1/* 2 * fs/nfs/nfs4proc.c 3 * 4 * Client-side procedure declarations for NFSv4. 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38#include <linux/mm.h> 39#include <linux/delay.h> 40#include <linux/errno.h> 41#include <linux/string.h> 42#include <linux/ratelimit.h> 43#include <linux/printk.h> 44#include <linux/slab.h> 45#include <linux/sunrpc/clnt.h> 46#include <linux/nfs.h> 47#include <linux/nfs4.h> 48#include <linux/nfs_fs.h> 49#include <linux/nfs_page.h> 50#include <linux/nfs_mount.h> 51#include <linux/namei.h> 52#include <linux/mount.h> 53#include <linux/module.h> 54#include <linux/xattr.h> 55#include <linux/utsname.h> 56#include <linux/freezer.h> 57#include <linux/iversion.h> 58 59#include "nfs4_fs.h" 60#include "delegation.h" 61#include "internal.h" 62#include "iostat.h" 63#include "callback.h" 64#include "pnfs.h" 65#include "netns.h" 66#include "sysfs.h" 67#include "nfs4idmap.h" 68#include "nfs4session.h" 69#include "fscache.h" 70#include "nfs42.h" 71 72#include "nfs4trace.h" 73 74#ifdef CONFIG_NFS_V4_2 75#include "nfs42.h" 76#endif /* CONFIG_NFS_V4_2 */ 77 78#define NFSDBG_FACILITY NFSDBG_PROC 79 80#define NFS4_BITMASK_SZ 3 81 82#define NFS4_POLL_RETRY_MIN (HZ/10) 83#define NFS4_POLL_RETRY_MAX (15*HZ) 84 85/* file attributes which can be mapped to nfs attributes */ 86#define NFS4_VALID_ATTRS (ATTR_MODE \ 87 | ATTR_UID \ 88 | ATTR_GID \ 89 | ATTR_SIZE \ 90 | ATTR_ATIME \ 91 | ATTR_MTIME \ 92 | ATTR_CTIME \ 93 | ATTR_ATIME_SET \ 94 | ATTR_MTIME_SET) 95 96struct nfs4_opendata; 97static int _nfs4_recover_proc_open(struct nfs4_opendata *data); 98static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 99static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); 100static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode); 101static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 102 struct nfs_fattr *fattr, struct iattr *sattr, 103 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 104 struct nfs4_label *olabel); 105#ifdef CONFIG_NFS_V4_1 106static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 107 const struct cred *cred, 108 struct nfs4_slot *slot, 109 bool is_privileged); 110static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 111 const struct cred *); 112static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *, 113 const struct cred *, bool); 114#endif 115static void nfs4_bitmask_set(__u32 bitmask[NFS4_BITMASK_SZ], 116 const __u32 *src, struct inode *inode, 117 struct nfs_server *server, 118 struct nfs4_label *label); 119 120#ifdef CONFIG_NFS_V4_SECURITY_LABEL 121static inline struct nfs4_label * 122nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 123 struct iattr *sattr, struct nfs4_label *label) 124{ 125 int err; 126 127 if (label == NULL) 128 return NULL; 129 130 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 131 return NULL; 132 133 label->lfs = 0; 134 label->pi = 0; 135 label->len = 0; 136 label->label = NULL; 137 138 err = security_dentry_init_security(dentry, sattr->ia_mode, 139 &dentry->d_name, (void **)&label->label, &label->len); 140 if (err == 0) 141 return label; 142 143 return NULL; 144} 145static inline void 146nfs4_label_release_security(struct nfs4_label *label) 147{ 148 if (label) 149 security_release_secctx(label->label, label->len); 150} 151static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 152{ 153 if (label) 154 return server->attr_bitmask; 155 156 return server->attr_bitmask_nl; 157} 158#else 159static inline struct nfs4_label * 160nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 161 struct iattr *sattr, struct nfs4_label *l) 162{ return NULL; } 163static inline void 164nfs4_label_release_security(struct nfs4_label *label) 165{ return; } 166static inline u32 * 167nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 168{ return server->attr_bitmask; } 169#endif 170 171/* Prevent leaks of NFSv4 errors into userland */ 172static int nfs4_map_errors(int err) 173{ 174 if (err >= -1000) 175 return err; 176 switch (err) { 177 case -NFS4ERR_RESOURCE: 178 case -NFS4ERR_LAYOUTTRYLATER: 179 case -NFS4ERR_RECALLCONFLICT: 180 case -NFS4ERR_RETURNCONFLICT: 181 return -EREMOTEIO; 182 case -NFS4ERR_WRONGSEC: 183 case -NFS4ERR_WRONG_CRED: 184 return -EPERM; 185 case -NFS4ERR_BADOWNER: 186 case -NFS4ERR_BADNAME: 187 return -EINVAL; 188 case -NFS4ERR_SHARE_DENIED: 189 return -EACCES; 190 case -NFS4ERR_MINOR_VERS_MISMATCH: 191 return -EPROTONOSUPPORT; 192 case -NFS4ERR_FILE_OPEN: 193 return -EBUSY; 194 default: 195 dprintk("%s could not handle NFSv4 error %d\n", 196 __func__, -err); 197 break; 198 } 199 return -EIO; 200} 201 202/* 203 * This is our standard bitmap for GETATTR requests. 204 */ 205const u32 nfs4_fattr_bitmap[3] = { 206 FATTR4_WORD0_TYPE 207 | FATTR4_WORD0_CHANGE 208 | FATTR4_WORD0_SIZE 209 | FATTR4_WORD0_FSID 210 | FATTR4_WORD0_FILEID, 211 FATTR4_WORD1_MODE 212 | FATTR4_WORD1_NUMLINKS 213 | FATTR4_WORD1_OWNER 214 | FATTR4_WORD1_OWNER_GROUP 215 | FATTR4_WORD1_RAWDEV 216 | FATTR4_WORD1_SPACE_USED 217 | FATTR4_WORD1_TIME_ACCESS 218 | FATTR4_WORD1_TIME_METADATA 219 | FATTR4_WORD1_TIME_MODIFY 220 | FATTR4_WORD1_MOUNTED_ON_FILEID, 221#ifdef CONFIG_NFS_V4_SECURITY_LABEL 222 FATTR4_WORD2_SECURITY_LABEL 223#endif 224}; 225 226static const u32 nfs4_pnfs_open_bitmap[3] = { 227 FATTR4_WORD0_TYPE 228 | FATTR4_WORD0_CHANGE 229 | FATTR4_WORD0_SIZE 230 | FATTR4_WORD0_FSID 231 | FATTR4_WORD0_FILEID, 232 FATTR4_WORD1_MODE 233 | FATTR4_WORD1_NUMLINKS 234 | FATTR4_WORD1_OWNER 235 | FATTR4_WORD1_OWNER_GROUP 236 | FATTR4_WORD1_RAWDEV 237 | FATTR4_WORD1_SPACE_USED 238 | FATTR4_WORD1_TIME_ACCESS 239 | FATTR4_WORD1_TIME_METADATA 240 | FATTR4_WORD1_TIME_MODIFY, 241 FATTR4_WORD2_MDSTHRESHOLD 242#ifdef CONFIG_NFS_V4_SECURITY_LABEL 243 | FATTR4_WORD2_SECURITY_LABEL 244#endif 245}; 246 247static const u32 nfs4_open_noattr_bitmap[3] = { 248 FATTR4_WORD0_TYPE 249 | FATTR4_WORD0_FILEID, 250}; 251 252const u32 nfs4_statfs_bitmap[3] = { 253 FATTR4_WORD0_FILES_AVAIL 254 | FATTR4_WORD0_FILES_FREE 255 | FATTR4_WORD0_FILES_TOTAL, 256 FATTR4_WORD1_SPACE_AVAIL 257 | FATTR4_WORD1_SPACE_FREE 258 | FATTR4_WORD1_SPACE_TOTAL 259}; 260 261const u32 nfs4_pathconf_bitmap[3] = { 262 FATTR4_WORD0_MAXLINK 263 | FATTR4_WORD0_MAXNAME, 264 0 265}; 266 267const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 268 | FATTR4_WORD0_MAXREAD 269 | FATTR4_WORD0_MAXWRITE 270 | FATTR4_WORD0_LEASE_TIME, 271 FATTR4_WORD1_TIME_DELTA 272 | FATTR4_WORD1_FS_LAYOUT_TYPES, 273 FATTR4_WORD2_LAYOUT_BLKSIZE 274 | FATTR4_WORD2_CLONE_BLKSIZE 275 | FATTR4_WORD2_XATTR_SUPPORT 276}; 277 278const u32 nfs4_fs_locations_bitmap[3] = { 279 FATTR4_WORD0_CHANGE 280 | FATTR4_WORD0_SIZE 281 | FATTR4_WORD0_FSID 282 | FATTR4_WORD0_FILEID 283 | FATTR4_WORD0_FS_LOCATIONS, 284 FATTR4_WORD1_OWNER 285 | FATTR4_WORD1_OWNER_GROUP 286 | FATTR4_WORD1_RAWDEV 287 | FATTR4_WORD1_SPACE_USED 288 | FATTR4_WORD1_TIME_ACCESS 289 | FATTR4_WORD1_TIME_METADATA 290 | FATTR4_WORD1_TIME_MODIFY 291 | FATTR4_WORD1_MOUNTED_ON_FILEID, 292}; 293 294static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src, 295 struct inode *inode) 296{ 297 unsigned long cache_validity; 298 299 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst)); 300 if (!inode || !nfs4_have_delegation(inode, FMODE_READ)) 301 return; 302 303 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); 304 if (!(cache_validity & NFS_INO_REVAL_FORCED)) 305 cache_validity &= ~(NFS_INO_INVALID_CHANGE 306 | NFS_INO_INVALID_SIZE); 307 308 if (!(cache_validity & NFS_INO_INVALID_SIZE)) 309 dst[0] &= ~FATTR4_WORD0_SIZE; 310 311 if (!(cache_validity & NFS_INO_INVALID_CHANGE)) 312 dst[0] &= ~FATTR4_WORD0_CHANGE; 313} 314 315static void nfs4_bitmap_copy_adjust_setattr(__u32 *dst, 316 const __u32 *src, struct inode *inode) 317{ 318 nfs4_bitmap_copy_adjust(dst, src, inode); 319} 320 321static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 322 struct nfs4_readdir_arg *readdir) 323{ 324 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; 325 __be32 *start, *p; 326 327 if (cookie > 2) { 328 readdir->cookie = cookie; 329 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 330 return; 331 } 332 333 readdir->cookie = 0; 334 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 335 if (cookie == 2) 336 return; 337 338 /* 339 * NFSv4 servers do not return entries for '.' and '..' 340 * Therefore, we fake these entries here. We let '.' 341 * have cookie 0 and '..' have cookie 1. Note that 342 * when talking to the server, we always send cookie 0 343 * instead of 1 or 2. 344 */ 345 start = p = kmap_atomic(*readdir->pages); 346 347 if (cookie == 0) { 348 *p++ = xdr_one; /* next */ 349 *p++ = xdr_zero; /* cookie, first word */ 350 *p++ = xdr_one; /* cookie, second word */ 351 *p++ = xdr_one; /* entry len */ 352 memcpy(p, ".\0\0\0", 4); /* entry */ 353 p++; 354 *p++ = xdr_one; /* bitmap length */ 355 *p++ = htonl(attrs); /* bitmap */ 356 *p++ = htonl(12); /* attribute buffer length */ 357 *p++ = htonl(NF4DIR); 358 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 359 } 360 361 *p++ = xdr_one; /* next */ 362 *p++ = xdr_zero; /* cookie, first word */ 363 *p++ = xdr_two; /* cookie, second word */ 364 *p++ = xdr_two; /* entry len */ 365 memcpy(p, "..\0\0", 4); /* entry */ 366 p++; 367 *p++ = xdr_one; /* bitmap length */ 368 *p++ = htonl(attrs); /* bitmap */ 369 *p++ = htonl(12); /* attribute buffer length */ 370 *p++ = htonl(NF4DIR); 371 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 372 373 readdir->pgbase = (char *)p - (char *)start; 374 readdir->count -= readdir->pgbase; 375 kunmap_atomic(start); 376} 377 378static void nfs4_fattr_set_prechange(struct nfs_fattr *fattr, u64 version) 379{ 380 if (!(fattr->valid & NFS_ATTR_FATTR_PRECHANGE)) { 381 fattr->pre_change_attr = version; 382 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; 383 } 384} 385 386static void nfs4_test_and_free_stateid(struct nfs_server *server, 387 nfs4_stateid *stateid, 388 const struct cred *cred) 389{ 390 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 391 392 ops->test_and_free_expired(server, stateid, cred); 393} 394 395static void __nfs4_free_revoked_stateid(struct nfs_server *server, 396 nfs4_stateid *stateid, 397 const struct cred *cred) 398{ 399 stateid->type = NFS4_REVOKED_STATEID_TYPE; 400 nfs4_test_and_free_stateid(server, stateid, cred); 401} 402 403static void nfs4_free_revoked_stateid(struct nfs_server *server, 404 const nfs4_stateid *stateid, 405 const struct cred *cred) 406{ 407 nfs4_stateid tmp; 408 409 nfs4_stateid_copy(&tmp, stateid); 410 __nfs4_free_revoked_stateid(server, &tmp, cred); 411} 412 413static long nfs4_update_delay(long *timeout) 414{ 415 long ret; 416 if (!timeout) 417 return NFS4_POLL_RETRY_MAX; 418 if (*timeout <= 0) 419 *timeout = NFS4_POLL_RETRY_MIN; 420 if (*timeout > NFS4_POLL_RETRY_MAX) 421 *timeout = NFS4_POLL_RETRY_MAX; 422 ret = *timeout; 423 *timeout <<= 1; 424 return ret; 425} 426 427static int nfs4_delay_killable(long *timeout) 428{ 429 might_sleep(); 430 431 freezable_schedule_timeout_killable_unsafe( 432 nfs4_update_delay(timeout)); 433 if (!__fatal_signal_pending(current)) 434 return 0; 435 return -EINTR; 436} 437 438static int nfs4_delay_interruptible(long *timeout) 439{ 440 might_sleep(); 441 442 freezable_schedule_timeout_interruptible_unsafe(nfs4_update_delay(timeout)); 443 if (!signal_pending(current)) 444 return 0; 445 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS; 446} 447 448static int nfs4_delay(long *timeout, bool interruptible) 449{ 450 if (interruptible) 451 return nfs4_delay_interruptible(timeout); 452 return nfs4_delay_killable(timeout); 453} 454 455static const nfs4_stateid * 456nfs4_recoverable_stateid(const nfs4_stateid *stateid) 457{ 458 if (!stateid) 459 return NULL; 460 switch (stateid->type) { 461 case NFS4_OPEN_STATEID_TYPE: 462 case NFS4_LOCK_STATEID_TYPE: 463 case NFS4_DELEGATION_STATEID_TYPE: 464 return stateid; 465 default: 466 break; 467 } 468 return NULL; 469} 470 471/* This is the error handling routine for processes that are allowed 472 * to sleep. 473 */ 474static int nfs4_do_handle_exception(struct nfs_server *server, 475 int errorcode, struct nfs4_exception *exception) 476{ 477 struct nfs_client *clp = server->nfs_client; 478 struct nfs4_state *state = exception->state; 479 const nfs4_stateid *stateid; 480 struct inode *inode = exception->inode; 481 int ret = errorcode; 482 483 exception->delay = 0; 484 exception->recovering = 0; 485 exception->retry = 0; 486 487 stateid = nfs4_recoverable_stateid(exception->stateid); 488 if (stateid == NULL && state != NULL) 489 stateid = nfs4_recoverable_stateid(&state->stateid); 490 491 switch(errorcode) { 492 case 0: 493 return 0; 494 case -NFS4ERR_BADHANDLE: 495 case -ESTALE: 496 if (inode != NULL && S_ISREG(inode->i_mode)) 497 pnfs_destroy_layout(NFS_I(inode)); 498 break; 499 case -NFS4ERR_DELEG_REVOKED: 500 case -NFS4ERR_ADMIN_REVOKED: 501 case -NFS4ERR_EXPIRED: 502 case -NFS4ERR_BAD_STATEID: 503 case -NFS4ERR_PARTNER_NO_AUTH: 504 if (inode != NULL && stateid != NULL) { 505 nfs_inode_find_state_and_recover(inode, 506 stateid); 507 goto wait_on_recovery; 508 } 509 fallthrough; 510 case -NFS4ERR_OPENMODE: 511 if (inode) { 512 int err; 513 514 err = nfs_async_inode_return_delegation(inode, 515 stateid); 516 if (err == 0) 517 goto wait_on_recovery; 518 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { 519 exception->retry = 1; 520 break; 521 } 522 } 523 if (state == NULL) 524 break; 525 ret = nfs4_schedule_stateid_recovery(server, state); 526 if (ret < 0) 527 break; 528 goto wait_on_recovery; 529 case -NFS4ERR_STALE_STATEID: 530 case -NFS4ERR_STALE_CLIENTID: 531 nfs4_schedule_lease_recovery(clp); 532 goto wait_on_recovery; 533 case -NFS4ERR_MOVED: 534 ret = nfs4_schedule_migration_recovery(server); 535 if (ret < 0) 536 break; 537 goto wait_on_recovery; 538 case -NFS4ERR_LEASE_MOVED: 539 nfs4_schedule_lease_moved_recovery(clp); 540 goto wait_on_recovery; 541#if defined(CONFIG_NFS_V4_1) 542 case -NFS4ERR_BADSESSION: 543 case -NFS4ERR_BADSLOT: 544 case -NFS4ERR_BAD_HIGH_SLOT: 545 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 546 case -NFS4ERR_DEADSESSION: 547 case -NFS4ERR_SEQ_FALSE_RETRY: 548 case -NFS4ERR_SEQ_MISORDERED: 549 /* Handled in nfs41_sequence_process() */ 550 goto wait_on_recovery; 551#endif /* defined(CONFIG_NFS_V4_1) */ 552 case -NFS4ERR_FILE_OPEN: 553 if (exception->timeout > HZ) { 554 /* We have retried a decent amount, time to 555 * fail 556 */ 557 ret = -EBUSY; 558 break; 559 } 560 fallthrough; 561 case -NFS4ERR_DELAY: 562 nfs_inc_server_stats(server, NFSIOS_DELAY); 563 fallthrough; 564 case -NFS4ERR_GRACE: 565 case -NFS4ERR_LAYOUTTRYLATER: 566 case -NFS4ERR_RECALLCONFLICT: 567 case -NFS4ERR_RETURNCONFLICT: 568 exception->delay = 1; 569 return 0; 570 571 case -NFS4ERR_RETRY_UNCACHED_REP: 572 case -NFS4ERR_OLD_STATEID: 573 exception->retry = 1; 574 break; 575 case -NFS4ERR_BADOWNER: 576 /* The following works around a Linux server bug! */ 577 case -NFS4ERR_BADNAME: 578 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 579 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 580 exception->retry = 1; 581 printk(KERN_WARNING "NFS: v4 server %s " 582 "does not accept raw " 583 "uid/gids. " 584 "Reenabling the idmapper.\n", 585 server->nfs_client->cl_hostname); 586 } 587 } 588 /* We failed to handle the error */ 589 return nfs4_map_errors(ret); 590wait_on_recovery: 591 exception->recovering = 1; 592 return 0; 593} 594 595/* This is the error handling routine for processes that are allowed 596 * to sleep. 597 */ 598int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 599{ 600 struct nfs_client *clp = server->nfs_client; 601 int ret; 602 603 ret = nfs4_do_handle_exception(server, errorcode, exception); 604 if (exception->delay) { 605 ret = nfs4_delay(&exception->timeout, 606 exception->interruptible); 607 goto out_retry; 608 } 609 if (exception->recovering) { 610 if (exception->task_is_privileged) 611 return -EDEADLOCK; 612 ret = nfs4_wait_clnt_recover(clp); 613 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 614 return -EIO; 615 goto out_retry; 616 } 617 return ret; 618out_retry: 619 if (ret == 0) 620 exception->retry = 1; 621 return ret; 622} 623 624static int 625nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 626 int errorcode, struct nfs4_exception *exception) 627{ 628 struct nfs_client *clp = server->nfs_client; 629 int ret; 630 631 ret = nfs4_do_handle_exception(server, errorcode, exception); 632 if (exception->delay) { 633 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 634 goto out_retry; 635 } 636 if (exception->recovering) { 637 if (exception->task_is_privileged) 638 return -EDEADLOCK; 639 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 640 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 641 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 642 goto out_retry; 643 } 644 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 645 ret = -EIO; 646 return ret; 647out_retry: 648 if (ret == 0) { 649 exception->retry = 1; 650 /* 651 * For NFS4ERR_MOVED, the client transport will need to 652 * be recomputed after migration recovery has completed. 653 */ 654 if (errorcode == -NFS4ERR_MOVED) 655 rpc_task_release_transport(task); 656 } 657 return ret; 658} 659 660int 661nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 662 struct nfs4_state *state, long *timeout) 663{ 664 struct nfs4_exception exception = { 665 .state = state, 666 }; 667 668 if (task->tk_status >= 0) 669 return 0; 670 if (timeout) 671 exception.timeout = *timeout; 672 task->tk_status = nfs4_async_handle_exception(task, server, 673 task->tk_status, 674 &exception); 675 if (exception.delay && timeout) 676 *timeout = exception.timeout; 677 if (exception.retry) 678 return -EAGAIN; 679 return 0; 680} 681 682/* 683 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 684 * or 'false' otherwise. 685 */ 686static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 687{ 688 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 689 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); 690} 691 692static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 693{ 694 spin_lock(&clp->cl_lock); 695 if (time_before(clp->cl_last_renewal,timestamp)) 696 clp->cl_last_renewal = timestamp; 697 spin_unlock(&clp->cl_lock); 698} 699 700static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 701{ 702 struct nfs_client *clp = server->nfs_client; 703 704 if (!nfs4_has_session(clp)) 705 do_renew_lease(clp, timestamp); 706} 707 708struct nfs4_call_sync_data { 709 const struct nfs_server *seq_server; 710 struct nfs4_sequence_args *seq_args; 711 struct nfs4_sequence_res *seq_res; 712}; 713 714void nfs4_init_sequence(struct nfs4_sequence_args *args, 715 struct nfs4_sequence_res *res, int cache_reply, 716 int privileged) 717{ 718 args->sa_slot = NULL; 719 args->sa_cache_this = cache_reply; 720 args->sa_privileged = privileged; 721 722 res->sr_slot = NULL; 723} 724 725static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 726{ 727 struct nfs4_slot *slot = res->sr_slot; 728 struct nfs4_slot_table *tbl; 729 730 tbl = slot->table; 731 spin_lock(&tbl->slot_tbl_lock); 732 if (!nfs41_wake_and_assign_slot(tbl, slot)) 733 nfs4_free_slot(tbl, slot); 734 spin_unlock(&tbl->slot_tbl_lock); 735 736 res->sr_slot = NULL; 737} 738 739static int nfs40_sequence_done(struct rpc_task *task, 740 struct nfs4_sequence_res *res) 741{ 742 if (res->sr_slot != NULL) 743 nfs40_sequence_free_slot(res); 744 return 1; 745} 746 747#if defined(CONFIG_NFS_V4_1) 748 749static void nfs41_release_slot(struct nfs4_slot *slot) 750{ 751 struct nfs4_session *session; 752 struct nfs4_slot_table *tbl; 753 bool send_new_highest_used_slotid = false; 754 755 if (!slot) 756 return; 757 tbl = slot->table; 758 session = tbl->session; 759 760 /* Bump the slot sequence number */ 761 if (slot->seq_done) 762 slot->seq_nr++; 763 slot->seq_done = 0; 764 765 spin_lock(&tbl->slot_tbl_lock); 766 /* Be nice to the server: try to ensure that the last transmitted 767 * value for highest_user_slotid <= target_highest_slotid 768 */ 769 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 770 send_new_highest_used_slotid = true; 771 772 if (nfs41_wake_and_assign_slot(tbl, slot)) { 773 send_new_highest_used_slotid = false; 774 goto out_unlock; 775 } 776 nfs4_free_slot(tbl, slot); 777 778 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 779 send_new_highest_used_slotid = false; 780out_unlock: 781 spin_unlock(&tbl->slot_tbl_lock); 782 if (send_new_highest_used_slotid) 783 nfs41_notify_server(session->clp); 784 if (waitqueue_active(&tbl->slot_waitq)) 785 wake_up_all(&tbl->slot_waitq); 786} 787 788static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 789{ 790 nfs41_release_slot(res->sr_slot); 791 res->sr_slot = NULL; 792} 793 794static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot, 795 u32 seqnr) 796{ 797 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0) 798 slot->seq_nr_highest_sent = seqnr; 799} 800static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, u32 seqnr) 801{ 802 nfs4_slot_sequence_record_sent(slot, seqnr); 803 slot->seq_nr_last_acked = seqnr; 804} 805 806static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred, 807 struct nfs4_slot *slot) 808{ 809 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true); 810 if (!IS_ERR(task)) 811 rpc_put_task_async(task); 812} 813 814static int nfs41_sequence_process(struct rpc_task *task, 815 struct nfs4_sequence_res *res) 816{ 817 struct nfs4_session *session; 818 struct nfs4_slot *slot = res->sr_slot; 819 struct nfs_client *clp; 820 int status; 821 int ret = 1; 822 823 if (slot == NULL) 824 goto out_noaction; 825 /* don't increment the sequence number if the task wasn't sent */ 826 if (!RPC_WAS_SENT(task) || slot->seq_done) 827 goto out; 828 829 session = slot->table->session; 830 clp = session->clp; 831 832 trace_nfs4_sequence_done(session, res); 833 834 status = res->sr_status; 835 if (task->tk_status == -NFS4ERR_DEADSESSION) 836 status = -NFS4ERR_DEADSESSION; 837 838 /* Check the SEQUENCE operation status */ 839 switch (status) { 840 case 0: 841 /* Mark this sequence number as having been acked */ 842 nfs4_slot_sequence_acked(slot, slot->seq_nr); 843 /* Update the slot's sequence and clientid lease timer */ 844 slot->seq_done = 1; 845 do_renew_lease(clp, res->sr_timestamp); 846 /* Check sequence flags */ 847 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 848 !!slot->privileged); 849 nfs41_update_target_slotid(slot->table, slot, res); 850 break; 851 case 1: 852 /* 853 * sr_status remains 1 if an RPC level error occurred. 854 * The server may or may not have processed the sequence 855 * operation.. 856 */ 857 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 858 slot->seq_done = 1; 859 goto out; 860 case -NFS4ERR_DELAY: 861 /* The server detected a resend of the RPC call and 862 * returned NFS4ERR_DELAY as per Section 2.10.6.2 863 * of RFC5661. 864 */ 865 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 866 __func__, 867 slot->slot_nr, 868 slot->seq_nr); 869 goto out_retry; 870 case -NFS4ERR_RETRY_UNCACHED_REP: 871 case -NFS4ERR_SEQ_FALSE_RETRY: 872 /* 873 * The server thinks we tried to replay a request. 874 * Retry the call after bumping the sequence ID. 875 */ 876 nfs4_slot_sequence_acked(slot, slot->seq_nr); 877 goto retry_new_seq; 878 case -NFS4ERR_BADSLOT: 879 /* 880 * The slot id we used was probably retired. Try again 881 * using a different slot id. 882 */ 883 if (slot->slot_nr < slot->table->target_highest_slotid) 884 goto session_recover; 885 goto retry_nowait; 886 case -NFS4ERR_SEQ_MISORDERED: 887 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 888 /* 889 * Were one or more calls using this slot interrupted? 890 * If the server never received the request, then our 891 * transmitted slot sequence number may be too high. However, 892 * if the server did receive the request then it might 893 * accidentally give us a reply with a mismatched operation. 894 * We can sort this out by sending a lone sequence operation 895 * to the server on the same slot. 896 */ 897 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) { 898 slot->seq_nr--; 899 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) { 900 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot); 901 res->sr_slot = NULL; 902 } 903 goto retry_nowait; 904 } 905 /* 906 * RFC5661: 907 * A retry might be sent while the original request is 908 * still in progress on the replier. The replier SHOULD 909 * deal with the issue by returning NFS4ERR_DELAY as the 910 * reply to SEQUENCE or CB_SEQUENCE operation, but 911 * implementations MAY return NFS4ERR_SEQ_MISORDERED. 912 * 913 * Restart the search after a delay. 914 */ 915 slot->seq_nr = slot->seq_nr_highest_sent; 916 goto out_retry; 917 case -NFS4ERR_BADSESSION: 918 case -NFS4ERR_DEADSESSION: 919 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 920 goto session_recover; 921 default: 922 /* Just update the slot sequence no. */ 923 slot->seq_done = 1; 924 } 925out: 926 /* The session may be reset by one of the error handlers. */ 927 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 928out_noaction: 929 return ret; 930session_recover: 931 set_bit(NFS4_SLOT_TBL_DRAINING, &session->fc_slot_table.slot_tbl_state); 932 nfs4_schedule_session_recovery(session, status); 933 dprintk("%s ERROR: %d Reset session\n", __func__, status); 934 nfs41_sequence_free_slot(res); 935 goto out; 936retry_new_seq: 937 ++slot->seq_nr; 938retry_nowait: 939 if (rpc_restart_call_prepare(task)) { 940 nfs41_sequence_free_slot(res); 941 task->tk_status = 0; 942 ret = 0; 943 } 944 goto out; 945out_retry: 946 if (!rpc_restart_call(task)) 947 goto out; 948 rpc_delay(task, NFS4_POLL_RETRY_MAX); 949 return 0; 950} 951 952int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 953{ 954 if (!nfs41_sequence_process(task, res)) 955 return 0; 956 if (res->sr_slot != NULL) 957 nfs41_sequence_free_slot(res); 958 return 1; 959 960} 961EXPORT_SYMBOL_GPL(nfs41_sequence_done); 962 963static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 964{ 965 if (res->sr_slot == NULL) 966 return 1; 967 if (res->sr_slot->table->session != NULL) 968 return nfs41_sequence_process(task, res); 969 return nfs40_sequence_done(task, res); 970} 971 972static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 973{ 974 if (res->sr_slot != NULL) { 975 if (res->sr_slot->table->session != NULL) 976 nfs41_sequence_free_slot(res); 977 else 978 nfs40_sequence_free_slot(res); 979 } 980} 981 982int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 983{ 984 if (res->sr_slot == NULL) 985 return 1; 986 if (!res->sr_slot->table->session) 987 return nfs40_sequence_done(task, res); 988 return nfs41_sequence_done(task, res); 989} 990EXPORT_SYMBOL_GPL(nfs4_sequence_done); 991 992static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 993{ 994 struct nfs4_call_sync_data *data = calldata; 995 996 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 997 998 nfs4_setup_sequence(data->seq_server->nfs_client, 999 data->seq_args, data->seq_res, task); 1000} 1001 1002static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 1003{ 1004 struct nfs4_call_sync_data *data = calldata; 1005 1006 nfs41_sequence_done(task, data->seq_res); 1007} 1008 1009static const struct rpc_call_ops nfs41_call_sync_ops = { 1010 .rpc_call_prepare = nfs41_call_sync_prepare, 1011 .rpc_call_done = nfs41_call_sync_done, 1012}; 1013 1014#else /* !CONFIG_NFS_V4_1 */ 1015 1016static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 1017{ 1018 return nfs40_sequence_done(task, res); 1019} 1020 1021static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 1022{ 1023 if (res->sr_slot != NULL) 1024 nfs40_sequence_free_slot(res); 1025} 1026 1027int nfs4_sequence_done(struct rpc_task *task, 1028 struct nfs4_sequence_res *res) 1029{ 1030 return nfs40_sequence_done(task, res); 1031} 1032EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1033 1034#endif /* !CONFIG_NFS_V4_1 */ 1035 1036static void nfs41_sequence_res_init(struct nfs4_sequence_res *res) 1037{ 1038 res->sr_timestamp = jiffies; 1039 res->sr_status_flags = 0; 1040 res->sr_status = 1; 1041} 1042 1043static 1044void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, 1045 struct nfs4_sequence_res *res, 1046 struct nfs4_slot *slot) 1047{ 1048 if (!slot) 1049 return; 1050 slot->privileged = args->sa_privileged ? 1 : 0; 1051 args->sa_slot = slot; 1052 1053 res->sr_slot = slot; 1054} 1055 1056int nfs4_setup_sequence(struct nfs_client *client, 1057 struct nfs4_sequence_args *args, 1058 struct nfs4_sequence_res *res, 1059 struct rpc_task *task) 1060{ 1061 struct nfs4_session *session = nfs4_get_session(client); 1062 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 1063 struct nfs4_slot *slot; 1064 1065 /* slot already allocated? */ 1066 if (res->sr_slot != NULL) 1067 goto out_start; 1068 1069 if (session) 1070 tbl = &session->fc_slot_table; 1071 1072 spin_lock(&tbl->slot_tbl_lock); 1073 /* The state manager will wait until the slot table is empty */ 1074 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 1075 goto out_sleep; 1076 1077 slot = nfs4_alloc_slot(tbl); 1078 if (IS_ERR(slot)) { 1079 if (slot == ERR_PTR(-ENOMEM)) 1080 goto out_sleep_timeout; 1081 goto out_sleep; 1082 } 1083 spin_unlock(&tbl->slot_tbl_lock); 1084 1085 nfs4_sequence_attach_slot(args, res, slot); 1086 1087 trace_nfs4_setup_sequence(session, args); 1088out_start: 1089 nfs41_sequence_res_init(res); 1090 rpc_call_start(task); 1091 return 0; 1092out_sleep_timeout: 1093 /* Try again in 1/4 second */ 1094 if (args->sa_privileged) 1095 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task, 1096 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED); 1097 else 1098 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task, 1099 NULL, jiffies + (HZ >> 2)); 1100 spin_unlock(&tbl->slot_tbl_lock); 1101 return -EAGAIN; 1102out_sleep: 1103 if (args->sa_privileged) 1104 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 1105 RPC_PRIORITY_PRIVILEGED); 1106 else 1107 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 1108 spin_unlock(&tbl->slot_tbl_lock); 1109 return -EAGAIN; 1110} 1111EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 1112 1113static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1114{ 1115 struct nfs4_call_sync_data *data = calldata; 1116 nfs4_setup_sequence(data->seq_server->nfs_client, 1117 data->seq_args, data->seq_res, task); 1118} 1119 1120static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1121{ 1122 struct nfs4_call_sync_data *data = calldata; 1123 nfs4_sequence_done(task, data->seq_res); 1124} 1125 1126static const struct rpc_call_ops nfs40_call_sync_ops = { 1127 .rpc_call_prepare = nfs40_call_sync_prepare, 1128 .rpc_call_done = nfs40_call_sync_done, 1129}; 1130 1131static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup) 1132{ 1133 int ret; 1134 struct rpc_task *task; 1135 1136 task = rpc_run_task(task_setup); 1137 if (IS_ERR(task)) 1138 return PTR_ERR(task); 1139 1140 ret = task->tk_status; 1141 rpc_put_task(task); 1142 return ret; 1143} 1144 1145static int nfs4_do_call_sync(struct rpc_clnt *clnt, 1146 struct nfs_server *server, 1147 struct rpc_message *msg, 1148 struct nfs4_sequence_args *args, 1149 struct nfs4_sequence_res *res, 1150 unsigned short task_flags) 1151{ 1152 struct nfs_client *clp = server->nfs_client; 1153 struct nfs4_call_sync_data data = { 1154 .seq_server = server, 1155 .seq_args = args, 1156 .seq_res = res, 1157 }; 1158 struct rpc_task_setup task_setup = { 1159 .rpc_client = clnt, 1160 .rpc_message = msg, 1161 .callback_ops = clp->cl_mvops->call_sync_ops, 1162 .callback_data = &data, 1163 .flags = task_flags, 1164 }; 1165 1166 return nfs4_call_sync_custom(&task_setup); 1167} 1168 1169static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1170 struct nfs_server *server, 1171 struct rpc_message *msg, 1172 struct nfs4_sequence_args *args, 1173 struct nfs4_sequence_res *res) 1174{ 1175 return nfs4_do_call_sync(clnt, server, msg, args, res, 0); 1176} 1177 1178 1179int nfs4_call_sync(struct rpc_clnt *clnt, 1180 struct nfs_server *server, 1181 struct rpc_message *msg, 1182 struct nfs4_sequence_args *args, 1183 struct nfs4_sequence_res *res, 1184 int cache_reply) 1185{ 1186 nfs4_init_sequence(args, res, cache_reply, 0); 1187 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1188} 1189 1190static void 1191nfs4_inc_nlink_locked(struct inode *inode) 1192{ 1193 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER; 1194 inc_nlink(inode); 1195} 1196 1197static void 1198nfs4_dec_nlink_locked(struct inode *inode) 1199{ 1200 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER; 1201 drop_nlink(inode); 1202} 1203 1204static void 1205nfs4_update_changeattr_locked(struct inode *inode, 1206 struct nfs4_change_info *cinfo, 1207 unsigned long timestamp, unsigned long cache_validity) 1208{ 1209 struct nfs_inode *nfsi = NFS_I(inode); 1210 1211 nfsi->cache_validity |= NFS_INO_INVALID_CTIME 1212 | NFS_INO_INVALID_MTIME 1213 | cache_validity; 1214 1215 if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(inode)) { 1216 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE; 1217 nfsi->attrtimeo_timestamp = jiffies; 1218 } else { 1219 if (S_ISDIR(inode->i_mode)) { 1220 nfsi->cache_validity |= NFS_INO_INVALID_DATA; 1221 nfs_force_lookup_revalidate(inode); 1222 } else { 1223 if (!NFS_PROTO(inode)->have_delegation(inode, 1224 FMODE_READ)) 1225 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE; 1226 } 1227 1228 if (cinfo->before != inode_peek_iversion_raw(inode)) 1229 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS | 1230 NFS_INO_INVALID_ACL | 1231 NFS_INO_INVALID_XATTR; 1232 } 1233 inode_set_iversion_raw(inode, cinfo->after); 1234 nfsi->read_cache_jiffies = timestamp; 1235 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1236 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1237 1238 if (nfsi->cache_validity & NFS_INO_INVALID_DATA) 1239 nfs_fscache_invalidate(inode); 1240} 1241 1242void 1243nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1244 unsigned long timestamp, unsigned long cache_validity) 1245{ 1246 spin_lock(&dir->i_lock); 1247 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1248 spin_unlock(&dir->i_lock); 1249} 1250 1251struct nfs4_open_createattrs { 1252 struct nfs4_label *label; 1253 struct iattr *sattr; 1254 const __u32 verf[2]; 1255}; 1256 1257static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1258 int err, struct nfs4_exception *exception) 1259{ 1260 if (err != -EINVAL) 1261 return false; 1262 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1263 return false; 1264 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1265 exception->retry = 1; 1266 return true; 1267} 1268 1269static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) 1270{ 1271 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 1272} 1273 1274static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) 1275{ 1276 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); 1277 1278 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; 1279} 1280 1281static u32 1282nfs4_map_atomic_open_share(struct nfs_server *server, 1283 fmode_t fmode, int openflags) 1284{ 1285 u32 res = 0; 1286 1287 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1288 case FMODE_READ: 1289 res = NFS4_SHARE_ACCESS_READ; 1290 break; 1291 case FMODE_WRITE: 1292 res = NFS4_SHARE_ACCESS_WRITE; 1293 break; 1294 case FMODE_READ|FMODE_WRITE: 1295 res = NFS4_SHARE_ACCESS_BOTH; 1296 } 1297 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1298 goto out; 1299 /* Want no delegation if we're using O_DIRECT */ 1300 if (openflags & O_DIRECT) 1301 res |= NFS4_SHARE_WANT_NO_DELEG; 1302out: 1303 return res; 1304} 1305 1306static enum open_claim_type4 1307nfs4_map_atomic_open_claim(struct nfs_server *server, 1308 enum open_claim_type4 claim) 1309{ 1310 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1311 return claim; 1312 switch (claim) { 1313 default: 1314 return claim; 1315 case NFS4_OPEN_CLAIM_FH: 1316 return NFS4_OPEN_CLAIM_NULL; 1317 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1318 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1319 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1320 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1321 } 1322} 1323 1324static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1325{ 1326 p->o_res.f_attr = &p->f_attr; 1327 p->o_res.f_label = p->f_label; 1328 p->o_res.seqid = p->o_arg.seqid; 1329 p->c_res.seqid = p->c_arg.seqid; 1330 p->o_res.server = p->o_arg.server; 1331 p->o_res.access_request = p->o_arg.access; 1332 nfs_fattr_init(&p->f_attr); 1333 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1334} 1335 1336static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1337 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1338 const struct nfs4_open_createattrs *c, 1339 enum open_claim_type4 claim, 1340 gfp_t gfp_mask) 1341{ 1342 struct dentry *parent = dget_parent(dentry); 1343 struct inode *dir = d_inode(parent); 1344 struct nfs_server *server = NFS_SERVER(dir); 1345 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1346 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1347 struct nfs4_opendata *p; 1348 1349 p = kzalloc(sizeof(*p), gfp_mask); 1350 if (p == NULL) 1351 goto err; 1352 1353 p->f_label = nfs4_label_alloc(server, gfp_mask); 1354 if (IS_ERR(p->f_label)) 1355 goto err_free_p; 1356 1357 p->a_label = nfs4_label_alloc(server, gfp_mask); 1358 if (IS_ERR(p->a_label)) 1359 goto err_free_f; 1360 1361 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1362 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1363 if (IS_ERR(p->o_arg.seqid)) 1364 goto err_free_label; 1365 nfs_sb_active(dentry->d_sb); 1366 p->dentry = dget(dentry); 1367 p->dir = parent; 1368 p->owner = sp; 1369 atomic_inc(&sp->so_count); 1370 p->o_arg.open_flags = flags; 1371 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1372 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1373 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1374 fmode, flags); 1375 if (flags & O_CREAT) { 1376 p->o_arg.umask = current_umask(); 1377 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1378 if (c->sattr != NULL && c->sattr->ia_valid != 0) { 1379 p->o_arg.u.attrs = &p->attrs; 1380 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1381 1382 memcpy(p->o_arg.u.verifier.data, c->verf, 1383 sizeof(p->o_arg.u.verifier.data)); 1384 } 1385 } 1386 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS 1387 * will return permission denied for all bits until close */ 1388 if (!(flags & O_EXCL)) { 1389 /* ask server to check for all possible rights as results 1390 * are cached */ 1391 switch (p->o_arg.claim) { 1392 default: 1393 break; 1394 case NFS4_OPEN_CLAIM_NULL: 1395 case NFS4_OPEN_CLAIM_FH: 1396 p->o_arg.access = NFS4_ACCESS_READ | 1397 NFS4_ACCESS_MODIFY | 1398 NFS4_ACCESS_EXTEND | 1399 NFS4_ACCESS_EXECUTE; 1400#ifdef CONFIG_NFS_V4_2 1401 if (server->caps & NFS_CAP_XATTR) 1402 p->o_arg.access |= NFS4_ACCESS_XAREAD | 1403 NFS4_ACCESS_XAWRITE | 1404 NFS4_ACCESS_XALIST; 1405#endif 1406 } 1407 } 1408 p->o_arg.clientid = server->nfs_client->cl_clientid; 1409 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1410 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1411 p->o_arg.name = &dentry->d_name; 1412 p->o_arg.server = server; 1413 p->o_arg.bitmask = nfs4_bitmask(server, label); 1414 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1415 switch (p->o_arg.claim) { 1416 case NFS4_OPEN_CLAIM_NULL: 1417 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1418 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1419 p->o_arg.fh = NFS_FH(dir); 1420 break; 1421 case NFS4_OPEN_CLAIM_PREVIOUS: 1422 case NFS4_OPEN_CLAIM_FH: 1423 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1424 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1425 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1426 } 1427 p->c_arg.fh = &p->o_res.fh; 1428 p->c_arg.stateid = &p->o_res.stateid; 1429 p->c_arg.seqid = p->o_arg.seqid; 1430 nfs4_init_opendata_res(p); 1431 kref_init(&p->kref); 1432 return p; 1433 1434err_free_label: 1435 nfs4_label_free(p->a_label); 1436err_free_f: 1437 nfs4_label_free(p->f_label); 1438err_free_p: 1439 kfree(p); 1440err: 1441 dput(parent); 1442 return NULL; 1443} 1444 1445static void nfs4_opendata_free(struct kref *kref) 1446{ 1447 struct nfs4_opendata *p = container_of(kref, 1448 struct nfs4_opendata, kref); 1449 struct super_block *sb = p->dentry->d_sb; 1450 1451 nfs4_lgopen_release(p->lgp); 1452 nfs_free_seqid(p->o_arg.seqid); 1453 nfs4_sequence_free_slot(&p->o_res.seq_res); 1454 if (p->state != NULL) 1455 nfs4_put_open_state(p->state); 1456 nfs4_put_state_owner(p->owner); 1457 1458 nfs4_label_free(p->a_label); 1459 nfs4_label_free(p->f_label); 1460 1461 dput(p->dir); 1462 dput(p->dentry); 1463 nfs_sb_deactive(sb); 1464 nfs_fattr_free_names(&p->f_attr); 1465 kfree(p->f_attr.mdsthreshold); 1466 kfree(p); 1467} 1468 1469static void nfs4_opendata_put(struct nfs4_opendata *p) 1470{ 1471 if (p != NULL) 1472 kref_put(&p->kref, nfs4_opendata_free); 1473} 1474 1475static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1476 fmode_t fmode) 1477{ 1478 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1479 case FMODE_READ|FMODE_WRITE: 1480 return state->n_rdwr != 0; 1481 case FMODE_WRITE: 1482 return state->n_wronly != 0; 1483 case FMODE_READ: 1484 return state->n_rdonly != 0; 1485 } 1486 WARN_ON_ONCE(1); 1487 return false; 1488} 1489 1490static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1491 int open_mode, enum open_claim_type4 claim) 1492{ 1493 int ret = 0; 1494 1495 if (open_mode & (O_EXCL|O_TRUNC)) 1496 goto out; 1497 switch (claim) { 1498 case NFS4_OPEN_CLAIM_NULL: 1499 case NFS4_OPEN_CLAIM_FH: 1500 goto out; 1501 default: 1502 break; 1503 } 1504 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1505 case FMODE_READ: 1506 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1507 && state->n_rdonly != 0; 1508 break; 1509 case FMODE_WRITE: 1510 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1511 && state->n_wronly != 0; 1512 break; 1513 case FMODE_READ|FMODE_WRITE: 1514 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1515 && state->n_rdwr != 0; 1516 } 1517out: 1518 return ret; 1519} 1520 1521static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1522 enum open_claim_type4 claim) 1523{ 1524 if (delegation == NULL) 1525 return 0; 1526 if ((delegation->type & fmode) != fmode) 1527 return 0; 1528 switch (claim) { 1529 case NFS4_OPEN_CLAIM_NULL: 1530 case NFS4_OPEN_CLAIM_FH: 1531 break; 1532 case NFS4_OPEN_CLAIM_PREVIOUS: 1533 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1534 break; 1535 fallthrough; 1536 default: 1537 return 0; 1538 } 1539 nfs_mark_delegation_referenced(delegation); 1540 return 1; 1541} 1542 1543static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1544{ 1545 switch (fmode) { 1546 case FMODE_WRITE: 1547 state->n_wronly++; 1548 break; 1549 case FMODE_READ: 1550 state->n_rdonly++; 1551 break; 1552 case FMODE_READ|FMODE_WRITE: 1553 state->n_rdwr++; 1554 } 1555 nfs4_state_set_mode_locked(state, state->state | fmode); 1556} 1557 1558#ifdef CONFIG_NFS_V4_1 1559static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1560{ 1561 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1562 return true; 1563 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1564 return true; 1565 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1566 return true; 1567 return false; 1568} 1569#endif /* CONFIG_NFS_V4_1 */ 1570 1571static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1572{ 1573 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1574 wake_up_all(&state->waitq); 1575} 1576 1577static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1578{ 1579 struct nfs_client *clp = state->owner->so_server->nfs_client; 1580 bool need_recover = false; 1581 1582 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1583 need_recover = true; 1584 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1585 need_recover = true; 1586 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1587 need_recover = true; 1588 if (need_recover) 1589 nfs4_state_mark_reclaim_nograce(clp, state); 1590} 1591 1592/* 1593 * Check for whether or not the caller may update the open stateid 1594 * to the value passed in by stateid. 1595 * 1596 * Note: This function relies heavily on the server implementing 1597 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1598 * correctly. 1599 * i.e. The stateid seqids have to be initialised to 1, and 1600 * are then incremented on every state transition. 1601 */ 1602static bool nfs_stateid_is_sequential(struct nfs4_state *state, 1603 const nfs4_stateid *stateid) 1604{ 1605 if (test_bit(NFS_OPEN_STATE, &state->flags)) { 1606 /* The common case - we're updating to a new sequence number */ 1607 if (nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1608 if (nfs4_stateid_is_next(&state->open_stateid, stateid)) 1609 return true; 1610 return false; 1611 } 1612 /* The server returned a new stateid */ 1613 } 1614 /* This is the first OPEN in this generation */ 1615 if (stateid->seqid == cpu_to_be32(1)) 1616 return true; 1617 return false; 1618} 1619 1620static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1621{ 1622 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1623 return; 1624 if (state->n_wronly) 1625 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1626 if (state->n_rdonly) 1627 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1628 if (state->n_rdwr) 1629 set_bit(NFS_O_RDWR_STATE, &state->flags); 1630 set_bit(NFS_OPEN_STATE, &state->flags); 1631} 1632 1633static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1634 nfs4_stateid *stateid, fmode_t fmode) 1635{ 1636 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1637 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1638 case FMODE_WRITE: 1639 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1640 break; 1641 case FMODE_READ: 1642 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1643 break; 1644 case 0: 1645 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1646 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1647 clear_bit(NFS_OPEN_STATE, &state->flags); 1648 } 1649 if (stateid == NULL) 1650 return; 1651 /* Handle OPEN+OPEN_DOWNGRADE races */ 1652 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1653 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1654 nfs_resync_open_stateid_locked(state); 1655 goto out; 1656 } 1657 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1658 nfs4_stateid_copy(&state->stateid, stateid); 1659 nfs4_stateid_copy(&state->open_stateid, stateid); 1660 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1661out: 1662 nfs_state_log_update_open_stateid(state); 1663} 1664 1665static void nfs_clear_open_stateid(struct nfs4_state *state, 1666 nfs4_stateid *arg_stateid, 1667 nfs4_stateid *stateid, fmode_t fmode) 1668{ 1669 write_seqlock(&state->seqlock); 1670 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1671 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1672 nfs_clear_open_stateid_locked(state, stateid, fmode); 1673 write_sequnlock(&state->seqlock); 1674 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1675 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1676} 1677 1678static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1679 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1680 __must_hold(&state->owner->so_lock) 1681 __must_hold(&state->seqlock) 1682 __must_hold(RCU) 1683 1684{ 1685 DEFINE_WAIT(wait); 1686 int status = 0; 1687 for (;;) { 1688 1689 if (nfs_stateid_is_sequential(state, stateid)) 1690 break; 1691 1692 if (status) 1693 break; 1694 /* Rely on seqids for serialisation with NFSv4.0 */ 1695 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1696 break; 1697 1698 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1699 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1700 /* 1701 * Ensure we process the state changes in the same order 1702 * in which the server processed them by delaying the 1703 * update of the stateid until we are in sequence. 1704 */ 1705 write_sequnlock(&state->seqlock); 1706 spin_unlock(&state->owner->so_lock); 1707 rcu_read_unlock(); 1708 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1709 1710 if (!fatal_signal_pending(current)) { 1711 if (schedule_timeout(5*HZ) == 0) 1712 status = -EAGAIN; 1713 else 1714 status = 0; 1715 } else 1716 status = -EINTR; 1717 finish_wait(&state->waitq, &wait); 1718 rcu_read_lock(); 1719 spin_lock(&state->owner->so_lock); 1720 write_seqlock(&state->seqlock); 1721 } 1722 1723 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1724 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1725 nfs4_stateid_copy(freeme, &state->open_stateid); 1726 nfs_test_and_clear_all_open_stateid(state); 1727 } 1728 1729 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1730 nfs4_stateid_copy(&state->stateid, stateid); 1731 nfs4_stateid_copy(&state->open_stateid, stateid); 1732 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1733 nfs_state_log_update_open_stateid(state); 1734} 1735 1736static void nfs_state_set_open_stateid(struct nfs4_state *state, 1737 const nfs4_stateid *open_stateid, 1738 fmode_t fmode, 1739 nfs4_stateid *freeme) 1740{ 1741 /* 1742 * Protect the call to nfs4_state_set_mode_locked and 1743 * serialise the stateid update 1744 */ 1745 write_seqlock(&state->seqlock); 1746 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1747 switch (fmode) { 1748 case FMODE_READ: 1749 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1750 break; 1751 case FMODE_WRITE: 1752 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1753 break; 1754 case FMODE_READ|FMODE_WRITE: 1755 set_bit(NFS_O_RDWR_STATE, &state->flags); 1756 } 1757 set_bit(NFS_OPEN_STATE, &state->flags); 1758 write_sequnlock(&state->seqlock); 1759} 1760 1761static void nfs_state_clear_open_state_flags(struct nfs4_state *state) 1762{ 1763 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1764 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1765 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1766 clear_bit(NFS_OPEN_STATE, &state->flags); 1767} 1768 1769static void nfs_state_set_delegation(struct nfs4_state *state, 1770 const nfs4_stateid *deleg_stateid, 1771 fmode_t fmode) 1772{ 1773 /* 1774 * Protect the call to nfs4_state_set_mode_locked and 1775 * serialise the stateid update 1776 */ 1777 write_seqlock(&state->seqlock); 1778 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1779 set_bit(NFS_DELEGATED_STATE, &state->flags); 1780 write_sequnlock(&state->seqlock); 1781} 1782 1783static void nfs_state_clear_delegation(struct nfs4_state *state) 1784{ 1785 write_seqlock(&state->seqlock); 1786 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1787 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1788 write_sequnlock(&state->seqlock); 1789} 1790 1791int update_open_stateid(struct nfs4_state *state, 1792 const nfs4_stateid *open_stateid, 1793 const nfs4_stateid *delegation, 1794 fmode_t fmode) 1795{ 1796 struct nfs_server *server = NFS_SERVER(state->inode); 1797 struct nfs_client *clp = server->nfs_client; 1798 struct nfs_inode *nfsi = NFS_I(state->inode); 1799 struct nfs_delegation *deleg_cur; 1800 nfs4_stateid freeme = { }; 1801 int ret = 0; 1802 1803 fmode &= (FMODE_READ|FMODE_WRITE); 1804 1805 rcu_read_lock(); 1806 spin_lock(&state->owner->so_lock); 1807 if (open_stateid != NULL) { 1808 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1809 ret = 1; 1810 } 1811 1812 deleg_cur = nfs4_get_valid_delegation(state->inode); 1813 if (deleg_cur == NULL) 1814 goto no_delegation; 1815 1816 spin_lock(&deleg_cur->lock); 1817 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1818 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1819 (deleg_cur->type & fmode) != fmode) 1820 goto no_delegation_unlock; 1821 1822 if (delegation == NULL) 1823 delegation = &deleg_cur->stateid; 1824 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation)) 1825 goto no_delegation_unlock; 1826 1827 nfs_mark_delegation_referenced(deleg_cur); 1828 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1829 ret = 1; 1830no_delegation_unlock: 1831 spin_unlock(&deleg_cur->lock); 1832no_delegation: 1833 if (ret) 1834 update_open_stateflags(state, fmode); 1835 spin_unlock(&state->owner->so_lock); 1836 rcu_read_unlock(); 1837 1838 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1839 nfs4_schedule_state_manager(clp); 1840 if (freeme.type != 0) 1841 nfs4_test_and_free_stateid(server, &freeme, 1842 state->owner->so_cred); 1843 1844 return ret; 1845} 1846 1847static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1848 const nfs4_stateid *stateid) 1849{ 1850 struct nfs4_state *state = lsp->ls_state; 1851 bool ret = false; 1852 1853 spin_lock(&state->state_lock); 1854 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1855 goto out_noupdate; 1856 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1857 goto out_noupdate; 1858 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1859 ret = true; 1860out_noupdate: 1861 spin_unlock(&state->state_lock); 1862 return ret; 1863} 1864 1865static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1866{ 1867 struct nfs_delegation *delegation; 1868 1869 fmode &= FMODE_READ|FMODE_WRITE; 1870 rcu_read_lock(); 1871 delegation = nfs4_get_valid_delegation(inode); 1872 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1873 rcu_read_unlock(); 1874 return; 1875 } 1876 rcu_read_unlock(); 1877 nfs4_inode_return_delegation(inode); 1878} 1879 1880static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1881{ 1882 struct nfs4_state *state = opendata->state; 1883 struct nfs_delegation *delegation; 1884 int open_mode = opendata->o_arg.open_flags; 1885 fmode_t fmode = opendata->o_arg.fmode; 1886 enum open_claim_type4 claim = opendata->o_arg.claim; 1887 nfs4_stateid stateid; 1888 int ret = -EAGAIN; 1889 1890 for (;;) { 1891 spin_lock(&state->owner->so_lock); 1892 if (can_open_cached(state, fmode, open_mode, claim)) { 1893 update_open_stateflags(state, fmode); 1894 spin_unlock(&state->owner->so_lock); 1895 goto out_return_state; 1896 } 1897 spin_unlock(&state->owner->so_lock); 1898 rcu_read_lock(); 1899 delegation = nfs4_get_valid_delegation(state->inode); 1900 if (!can_open_delegated(delegation, fmode, claim)) { 1901 rcu_read_unlock(); 1902 break; 1903 } 1904 /* Save the delegation */ 1905 nfs4_stateid_copy(&stateid, &delegation->stateid); 1906 rcu_read_unlock(); 1907 nfs_release_seqid(opendata->o_arg.seqid); 1908 if (!opendata->is_recover) { 1909 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1910 if (ret != 0) 1911 goto out; 1912 } 1913 ret = -EAGAIN; 1914 1915 /* Try to update the stateid using the delegation */ 1916 if (update_open_stateid(state, NULL, &stateid, fmode)) 1917 goto out_return_state; 1918 } 1919out: 1920 return ERR_PTR(ret); 1921out_return_state: 1922 refcount_inc(&state->count); 1923 return state; 1924} 1925 1926static void 1927nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1928{ 1929 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1930 struct nfs_delegation *delegation; 1931 int delegation_flags = 0; 1932 1933 rcu_read_lock(); 1934 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1935 if (delegation) 1936 delegation_flags = delegation->flags; 1937 rcu_read_unlock(); 1938 switch (data->o_arg.claim) { 1939 default: 1940 break; 1941 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1942 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1943 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1944 "returning a delegation for " 1945 "OPEN(CLAIM_DELEGATE_CUR)\n", 1946 clp->cl_hostname); 1947 return; 1948 } 1949 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1950 nfs_inode_set_delegation(state->inode, 1951 data->owner->so_cred, 1952 data->o_res.delegation_type, 1953 &data->o_res.delegation, 1954 data->o_res.pagemod_limit); 1955 else 1956 nfs_inode_reclaim_delegation(state->inode, 1957 data->owner->so_cred, 1958 data->o_res.delegation_type, 1959 &data->o_res.delegation, 1960 data->o_res.pagemod_limit); 1961 1962 if (data->o_res.do_recall) 1963 nfs_async_inode_return_delegation(state->inode, 1964 &data->o_res.delegation); 1965} 1966 1967/* 1968 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1969 * and update the nfs4_state. 1970 */ 1971static struct nfs4_state * 1972_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1973{ 1974 struct inode *inode = data->state->inode; 1975 struct nfs4_state *state = data->state; 1976 int ret; 1977 1978 if (!data->rpc_done) { 1979 if (data->rpc_status) 1980 return ERR_PTR(data->rpc_status); 1981 return nfs4_try_open_cached(data); 1982 } 1983 1984 ret = nfs_refresh_inode(inode, &data->f_attr); 1985 if (ret) 1986 return ERR_PTR(ret); 1987 1988 if (data->o_res.delegation_type != 0) 1989 nfs4_opendata_check_deleg(data, state); 1990 1991 if (!update_open_stateid(state, &data->o_res.stateid, 1992 NULL, data->o_arg.fmode)) 1993 return ERR_PTR(-EAGAIN); 1994 refcount_inc(&state->count); 1995 1996 return state; 1997} 1998 1999static struct inode * 2000nfs4_opendata_get_inode(struct nfs4_opendata *data) 2001{ 2002 struct inode *inode; 2003 2004 switch (data->o_arg.claim) { 2005 case NFS4_OPEN_CLAIM_NULL: 2006 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 2007 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 2008 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 2009 return ERR_PTR(-EAGAIN); 2010 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 2011 &data->f_attr, data->f_label); 2012 break; 2013 default: 2014 inode = d_inode(data->dentry); 2015 ihold(inode); 2016 nfs_refresh_inode(inode, &data->f_attr); 2017 } 2018 return inode; 2019} 2020 2021static struct nfs4_state * 2022nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 2023{ 2024 struct nfs4_state *state; 2025 struct inode *inode; 2026 2027 inode = nfs4_opendata_get_inode(data); 2028 if (IS_ERR(inode)) 2029 return ERR_CAST(inode); 2030 if (data->state != NULL && data->state->inode == inode) { 2031 state = data->state; 2032 refcount_inc(&state->count); 2033 } else 2034 state = nfs4_get_open_state(inode, data->owner); 2035 iput(inode); 2036 if (state == NULL) 2037 state = ERR_PTR(-ENOMEM); 2038 return state; 2039} 2040 2041static struct nfs4_state * 2042_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2043{ 2044 struct nfs4_state *state; 2045 2046 if (!data->rpc_done) { 2047 state = nfs4_try_open_cached(data); 2048 trace_nfs4_cached_open(data->state); 2049 goto out; 2050 } 2051 2052 state = nfs4_opendata_find_nfs4_state(data); 2053 if (IS_ERR(state)) 2054 goto out; 2055 2056 if (data->o_res.delegation_type != 0) 2057 nfs4_opendata_check_deleg(data, state); 2058 if (!update_open_stateid(state, &data->o_res.stateid, 2059 NULL, data->o_arg.fmode)) { 2060 nfs4_put_open_state(state); 2061 state = ERR_PTR(-EAGAIN); 2062 } 2063out: 2064 nfs_release_seqid(data->o_arg.seqid); 2065 return state; 2066} 2067 2068static struct nfs4_state * 2069nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2070{ 2071 struct nfs4_state *ret; 2072 2073 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 2074 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 2075 else 2076 ret = _nfs4_opendata_to_nfs4_state(data); 2077 nfs4_sequence_free_slot(&data->o_res.seq_res); 2078 return ret; 2079} 2080 2081static struct nfs_open_context * 2082nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 2083{ 2084 struct nfs_inode *nfsi = NFS_I(state->inode); 2085 struct nfs_open_context *ctx; 2086 2087 rcu_read_lock(); 2088 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 2089 if (ctx->state != state) 2090 continue; 2091 if ((ctx->mode & mode) != mode) 2092 continue; 2093 if (!get_nfs_open_context(ctx)) 2094 continue; 2095 rcu_read_unlock(); 2096 return ctx; 2097 } 2098 rcu_read_unlock(); 2099 return ERR_PTR(-ENOENT); 2100} 2101 2102static struct nfs_open_context * 2103nfs4_state_find_open_context(struct nfs4_state *state) 2104{ 2105 struct nfs_open_context *ctx; 2106 2107 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 2108 if (!IS_ERR(ctx)) 2109 return ctx; 2110 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 2111 if (!IS_ERR(ctx)) 2112 return ctx; 2113 return nfs4_state_find_open_context_mode(state, FMODE_READ); 2114} 2115 2116static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 2117 struct nfs4_state *state, enum open_claim_type4 claim) 2118{ 2119 struct nfs4_opendata *opendata; 2120 2121 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 2122 NULL, claim, GFP_NOFS); 2123 if (opendata == NULL) 2124 return ERR_PTR(-ENOMEM); 2125 opendata->state = state; 2126 refcount_inc(&state->count); 2127 return opendata; 2128} 2129 2130static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 2131 fmode_t fmode) 2132{ 2133 struct nfs4_state *newstate; 2134 struct nfs_server *server = NFS_SB(opendata->dentry->d_sb); 2135 int openflags = opendata->o_arg.open_flags; 2136 int ret; 2137 2138 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2139 return 0; 2140 opendata->o_arg.fmode = fmode; 2141 opendata->o_arg.share_access = 2142 nfs4_map_atomic_open_share(server, fmode, openflags); 2143 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2144 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2145 nfs4_init_opendata_res(opendata); 2146 ret = _nfs4_recover_proc_open(opendata); 2147 if (ret != 0) 2148 return ret; 2149 newstate = nfs4_opendata_to_nfs4_state(opendata); 2150 if (IS_ERR(newstate)) 2151 return PTR_ERR(newstate); 2152 if (newstate != opendata->state) 2153 ret = -ESTALE; 2154 nfs4_close_state(newstate, fmode); 2155 return ret; 2156} 2157 2158static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2159{ 2160 int ret; 2161 2162 /* memory barrier prior to reading state->n_* */ 2163 smp_rmb(); 2164 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2165 if (ret != 0) 2166 return ret; 2167 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2168 if (ret != 0) 2169 return ret; 2170 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2171 if (ret != 0) 2172 return ret; 2173 /* 2174 * We may have performed cached opens for all three recoveries. 2175 * Check if we need to update the current stateid. 2176 */ 2177 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2178 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2179 write_seqlock(&state->seqlock); 2180 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2181 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2182 write_sequnlock(&state->seqlock); 2183 } 2184 return 0; 2185} 2186 2187/* 2188 * OPEN_RECLAIM: 2189 * reclaim state on the server after a reboot. 2190 */ 2191static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2192{ 2193 struct nfs_delegation *delegation; 2194 struct nfs4_opendata *opendata; 2195 fmode_t delegation_type = 0; 2196 int status; 2197 2198 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2199 NFS4_OPEN_CLAIM_PREVIOUS); 2200 if (IS_ERR(opendata)) 2201 return PTR_ERR(opendata); 2202 rcu_read_lock(); 2203 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2204 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 2205 delegation_type = delegation->type; 2206 rcu_read_unlock(); 2207 opendata->o_arg.u.delegation_type = delegation_type; 2208 status = nfs4_open_recover(opendata, state); 2209 nfs4_opendata_put(opendata); 2210 return status; 2211} 2212 2213static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2214{ 2215 struct nfs_server *server = NFS_SERVER(state->inode); 2216 struct nfs4_exception exception = { }; 2217 int err; 2218 do { 2219 err = _nfs4_do_open_reclaim(ctx, state); 2220 trace_nfs4_open_reclaim(ctx, 0, err); 2221 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2222 continue; 2223 if (err != -NFS4ERR_DELAY) 2224 break; 2225 nfs4_handle_exception(server, err, &exception); 2226 } while (exception.retry); 2227 return err; 2228} 2229 2230static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2231{ 2232 struct nfs_open_context *ctx; 2233 int ret; 2234 2235 ctx = nfs4_state_find_open_context(state); 2236 if (IS_ERR(ctx)) 2237 return -EAGAIN; 2238 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2239 nfs_state_clear_open_state_flags(state); 2240 ret = nfs4_do_open_reclaim(ctx, state); 2241 put_nfs_open_context(ctx); 2242 return ret; 2243} 2244 2245static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, struct file_lock *fl, int err) 2246{ 2247 switch (err) { 2248 default: 2249 printk(KERN_ERR "NFS: %s: unhandled error " 2250 "%d.\n", __func__, err); 2251 case 0: 2252 case -ENOENT: 2253 case -EAGAIN: 2254 case -ESTALE: 2255 case -ETIMEDOUT: 2256 break; 2257 case -NFS4ERR_BADSESSION: 2258 case -NFS4ERR_BADSLOT: 2259 case -NFS4ERR_BAD_HIGH_SLOT: 2260 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2261 case -NFS4ERR_DEADSESSION: 2262 return -EAGAIN; 2263 case -NFS4ERR_STALE_CLIENTID: 2264 case -NFS4ERR_STALE_STATEID: 2265 /* Don't recall a delegation if it was lost */ 2266 nfs4_schedule_lease_recovery(server->nfs_client); 2267 return -EAGAIN; 2268 case -NFS4ERR_MOVED: 2269 nfs4_schedule_migration_recovery(server); 2270 return -EAGAIN; 2271 case -NFS4ERR_LEASE_MOVED: 2272 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2273 return -EAGAIN; 2274 case -NFS4ERR_DELEG_REVOKED: 2275 case -NFS4ERR_ADMIN_REVOKED: 2276 case -NFS4ERR_EXPIRED: 2277 case -NFS4ERR_BAD_STATEID: 2278 case -NFS4ERR_OPENMODE: 2279 nfs_inode_find_state_and_recover(state->inode, 2280 stateid); 2281 nfs4_schedule_stateid_recovery(server, state); 2282 return -EAGAIN; 2283 case -NFS4ERR_DELAY: 2284 case -NFS4ERR_GRACE: 2285 ssleep(1); 2286 return -EAGAIN; 2287 case -ENOMEM: 2288 case -NFS4ERR_DENIED: 2289 if (fl) { 2290 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2291 if (lsp) 2292 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2293 } 2294 return 0; 2295 } 2296 return err; 2297} 2298 2299int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2300 struct nfs4_state *state, const nfs4_stateid *stateid) 2301{ 2302 struct nfs_server *server = NFS_SERVER(state->inode); 2303 struct nfs4_opendata *opendata; 2304 int err = 0; 2305 2306 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2307 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2308 if (IS_ERR(opendata)) 2309 return PTR_ERR(opendata); 2310 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2311 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { 2312 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2313 if (err) 2314 goto out; 2315 } 2316 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { 2317 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2318 if (err) 2319 goto out; 2320 } 2321 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { 2322 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2323 if (err) 2324 goto out; 2325 } 2326 nfs_state_clear_delegation(state); 2327out: 2328 nfs4_opendata_put(opendata); 2329 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2330} 2331 2332static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2333{ 2334 struct nfs4_opendata *data = calldata; 2335 2336 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2337 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2338} 2339 2340static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2341{ 2342 struct nfs4_opendata *data = calldata; 2343 2344 nfs40_sequence_done(task, &data->c_res.seq_res); 2345 2346 data->rpc_status = task->tk_status; 2347 if (data->rpc_status == 0) { 2348 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2349 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2350 renew_lease(data->o_res.server, data->timestamp); 2351 data->rpc_done = true; 2352 } 2353} 2354 2355static void nfs4_open_confirm_release(void *calldata) 2356{ 2357 struct nfs4_opendata *data = calldata; 2358 struct nfs4_state *state = NULL; 2359 2360 /* If this request hasn't been cancelled, do nothing */ 2361 if (!data->cancelled) 2362 goto out_free; 2363 /* In case of error, no cleanup! */ 2364 if (!data->rpc_done) 2365 goto out_free; 2366 state = nfs4_opendata_to_nfs4_state(data); 2367 if (!IS_ERR(state)) 2368 nfs4_close_state(state, data->o_arg.fmode); 2369out_free: 2370 nfs4_opendata_put(data); 2371} 2372 2373static const struct rpc_call_ops nfs4_open_confirm_ops = { 2374 .rpc_call_prepare = nfs4_open_confirm_prepare, 2375 .rpc_call_done = nfs4_open_confirm_done, 2376 .rpc_release = nfs4_open_confirm_release, 2377}; 2378 2379/* 2380 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2381 */ 2382static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2383{ 2384 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2385 struct rpc_task *task; 2386 struct rpc_message msg = { 2387 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2388 .rpc_argp = &data->c_arg, 2389 .rpc_resp = &data->c_res, 2390 .rpc_cred = data->owner->so_cred, 2391 }; 2392 struct rpc_task_setup task_setup_data = { 2393 .rpc_client = server->client, 2394 .rpc_message = &msg, 2395 .callback_ops = &nfs4_open_confirm_ops, 2396 .callback_data = data, 2397 .workqueue = nfsiod_workqueue, 2398 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2399 }; 2400 int status; 2401 2402 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2403 data->is_recover); 2404 kref_get(&data->kref); 2405 data->rpc_done = false; 2406 data->rpc_status = 0; 2407 data->timestamp = jiffies; 2408 task = rpc_run_task(&task_setup_data); 2409 if (IS_ERR(task)) 2410 return PTR_ERR(task); 2411 status = rpc_wait_for_completion_task(task); 2412 if (status != 0) { 2413 data->cancelled = true; 2414 smp_wmb(); 2415 } else 2416 status = data->rpc_status; 2417 rpc_put_task(task); 2418 return status; 2419} 2420 2421static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2422{ 2423 struct nfs4_opendata *data = calldata; 2424 struct nfs4_state_owner *sp = data->owner; 2425 struct nfs_client *clp = sp->so_server->nfs_client; 2426 enum open_claim_type4 claim = data->o_arg.claim; 2427 2428 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2429 goto out_wait; 2430 /* 2431 * Check if we still need to send an OPEN call, or if we can use 2432 * a delegation instead. 2433 */ 2434 if (data->state != NULL) { 2435 struct nfs_delegation *delegation; 2436 2437 if (can_open_cached(data->state, data->o_arg.fmode, 2438 data->o_arg.open_flags, claim)) 2439 goto out_no_action; 2440 rcu_read_lock(); 2441 delegation = nfs4_get_valid_delegation(data->state->inode); 2442 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2443 goto unlock_no_action; 2444 rcu_read_unlock(); 2445 } 2446 /* Update client id. */ 2447 data->o_arg.clientid = clp->cl_clientid; 2448 switch (claim) { 2449 default: 2450 break; 2451 case NFS4_OPEN_CLAIM_PREVIOUS: 2452 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2453 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2454 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2455 fallthrough; 2456 case NFS4_OPEN_CLAIM_FH: 2457 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2458 } 2459 data->timestamp = jiffies; 2460 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2461 &data->o_arg.seq_args, 2462 &data->o_res.seq_res, 2463 task) != 0) 2464 nfs_release_seqid(data->o_arg.seqid); 2465 2466 /* Set the create mode (note dependency on the session type) */ 2467 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2468 if (data->o_arg.open_flags & O_EXCL) { 2469 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2470 if (nfs4_has_persistent_session(clp)) 2471 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2472 else if (clp->cl_mvops->minor_version > 0) 2473 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2474 } 2475 return; 2476unlock_no_action: 2477 trace_nfs4_cached_open(data->state); 2478 rcu_read_unlock(); 2479out_no_action: 2480 task->tk_action = NULL; 2481out_wait: 2482 nfs4_sequence_done(task, &data->o_res.seq_res); 2483} 2484 2485static void nfs4_open_done(struct rpc_task *task, void *calldata) 2486{ 2487 struct nfs4_opendata *data = calldata; 2488 2489 data->rpc_status = task->tk_status; 2490 2491 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2492 return; 2493 2494 if (task->tk_status == 0) { 2495 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2496 switch (data->o_res.f_attr->mode & S_IFMT) { 2497 case S_IFREG: 2498 break; 2499 case S_IFLNK: 2500 data->rpc_status = -ELOOP; 2501 break; 2502 case S_IFDIR: 2503 data->rpc_status = -EISDIR; 2504 break; 2505 default: 2506 data->rpc_status = -ENOTDIR; 2507 } 2508 } 2509 renew_lease(data->o_res.server, data->timestamp); 2510 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2511 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2512 } 2513 data->rpc_done = true; 2514} 2515 2516static void nfs4_open_release(void *calldata) 2517{ 2518 struct nfs4_opendata *data = calldata; 2519 struct nfs4_state *state = NULL; 2520 2521 /* If this request hasn't been cancelled, do nothing */ 2522 if (!data->cancelled) 2523 goto out_free; 2524 /* In case of error, no cleanup! */ 2525 if (data->rpc_status != 0 || !data->rpc_done) 2526 goto out_free; 2527 /* In case we need an open_confirm, no cleanup! */ 2528 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2529 goto out_free; 2530 state = nfs4_opendata_to_nfs4_state(data); 2531 if (!IS_ERR(state)) 2532 nfs4_close_state(state, data->o_arg.fmode); 2533out_free: 2534 nfs4_opendata_put(data); 2535} 2536 2537static const struct rpc_call_ops nfs4_open_ops = { 2538 .rpc_call_prepare = nfs4_open_prepare, 2539 .rpc_call_done = nfs4_open_done, 2540 .rpc_release = nfs4_open_release, 2541}; 2542 2543static int nfs4_run_open_task(struct nfs4_opendata *data, 2544 struct nfs_open_context *ctx) 2545{ 2546 struct inode *dir = d_inode(data->dir); 2547 struct nfs_server *server = NFS_SERVER(dir); 2548 struct nfs_openargs *o_arg = &data->o_arg; 2549 struct nfs_openres *o_res = &data->o_res; 2550 struct rpc_task *task; 2551 struct rpc_message msg = { 2552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2553 .rpc_argp = o_arg, 2554 .rpc_resp = o_res, 2555 .rpc_cred = data->owner->so_cred, 2556 }; 2557 struct rpc_task_setup task_setup_data = { 2558 .rpc_client = server->client, 2559 .rpc_message = &msg, 2560 .callback_ops = &nfs4_open_ops, 2561 .callback_data = data, 2562 .workqueue = nfsiod_workqueue, 2563 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2564 }; 2565 int status; 2566 2567 kref_get(&data->kref); 2568 data->rpc_done = false; 2569 data->rpc_status = 0; 2570 data->cancelled = false; 2571 data->is_recover = false; 2572 if (!ctx) { 2573 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2574 data->is_recover = true; 2575 task_setup_data.flags |= RPC_TASK_TIMEOUT; 2576 } else { 2577 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2578 pnfs_lgopen_prepare(data, ctx); 2579 } 2580 task = rpc_run_task(&task_setup_data); 2581 if (IS_ERR(task)) 2582 return PTR_ERR(task); 2583 status = rpc_wait_for_completion_task(task); 2584 if (status != 0) { 2585 data->cancelled = true; 2586 smp_wmb(); 2587 } else 2588 status = data->rpc_status; 2589 rpc_put_task(task); 2590 2591 return status; 2592} 2593 2594static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2595{ 2596 struct inode *dir = d_inode(data->dir); 2597 struct nfs_openres *o_res = &data->o_res; 2598 int status; 2599 2600 status = nfs4_run_open_task(data, NULL); 2601 if (status != 0 || !data->rpc_done) 2602 return status; 2603 2604 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2605 2606 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2607 status = _nfs4_proc_open_confirm(data); 2608 2609 return status; 2610} 2611 2612/* 2613 * Additional permission checks in order to distinguish between an 2614 * open for read, and an open for execute. This works around the 2615 * fact that NFSv4 OPEN treats read and execute permissions as being 2616 * the same. 2617 * Note that in the non-execute case, we want to turn off permission 2618 * checking if we just created a new file (POSIX open() semantics). 2619 */ 2620static int nfs4_opendata_access(const struct cred *cred, 2621 struct nfs4_opendata *opendata, 2622 struct nfs4_state *state, fmode_t fmode, 2623 int openflags) 2624{ 2625 struct nfs_access_entry cache; 2626 u32 mask, flags; 2627 2628 /* access call failed or for some reason the server doesn't 2629 * support any access modes -- defer access call until later */ 2630 if (opendata->o_res.access_supported == 0) 2631 return 0; 2632 2633 mask = 0; 2634 /* 2635 * Use openflags to check for exec, because fmode won't 2636 * always have FMODE_EXEC set when file open for exec. 2637 */ 2638 if (openflags & __FMODE_EXEC) { 2639 /* ONLY check for exec rights */ 2640 if (S_ISDIR(state->inode->i_mode)) 2641 mask = NFS4_ACCESS_LOOKUP; 2642 else 2643 mask = NFS4_ACCESS_EXECUTE; 2644 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2645 mask = NFS4_ACCESS_READ; 2646 2647 cache.cred = cred; 2648 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2649 nfs_access_add_cache(state->inode, &cache); 2650 2651 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2652 if ((mask & ~cache.mask & flags) == 0) 2653 return 0; 2654 2655 return -EACCES; 2656} 2657 2658/* 2659 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2660 */ 2661static int _nfs4_proc_open(struct nfs4_opendata *data, 2662 struct nfs_open_context *ctx) 2663{ 2664 struct inode *dir = d_inode(data->dir); 2665 struct nfs_server *server = NFS_SERVER(dir); 2666 struct nfs_openargs *o_arg = &data->o_arg; 2667 struct nfs_openres *o_res = &data->o_res; 2668 int status; 2669 2670 status = nfs4_run_open_task(data, ctx); 2671 if (!data->rpc_done) 2672 return status; 2673 if (status != 0) { 2674 if (status == -NFS4ERR_BADNAME && 2675 !(o_arg->open_flags & O_CREAT)) 2676 return -ENOENT; 2677 return status; 2678 } 2679 2680 nfs_fattr_map_and_free_names(server, &data->f_attr); 2681 2682 if (o_arg->open_flags & O_CREAT) { 2683 if (o_arg->open_flags & O_EXCL) 2684 data->file_created = true; 2685 else if (o_res->cinfo.before != o_res->cinfo.after) 2686 data->file_created = true; 2687 if (data->file_created || 2688 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2689 nfs4_update_changeattr(dir, &o_res->cinfo, 2690 o_res->f_attr->time_start, 2691 NFS_INO_INVALID_DATA); 2692 } 2693 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2694 server->caps &= ~NFS_CAP_POSIX_LOCK; 2695 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2696 status = _nfs4_proc_open_confirm(data); 2697 if (status != 0) 2698 return status; 2699 } 2700 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2701 nfs4_sequence_free_slot(&o_res->seq_res); 2702 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, 2703 o_res->f_label, NULL); 2704 } 2705 return 0; 2706} 2707 2708/* 2709 * OPEN_EXPIRED: 2710 * reclaim state on the server after a network partition. 2711 * Assumes caller holds the appropriate lock 2712 */ 2713static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2714{ 2715 struct nfs4_opendata *opendata; 2716 int ret; 2717 2718 opendata = nfs4_open_recoverdata_alloc(ctx, state, NFS4_OPEN_CLAIM_FH); 2719 if (IS_ERR(opendata)) 2720 return PTR_ERR(opendata); 2721 /* 2722 * We're not recovering a delegation, so ask for no delegation. 2723 * Otherwise the recovery thread could deadlock with an outstanding 2724 * delegation return. 2725 */ 2726 opendata->o_arg.open_flags = O_DIRECT; 2727 ret = nfs4_open_recover(opendata, state); 2728 if (ret == -ESTALE) 2729 d_drop(ctx->dentry); 2730 nfs4_opendata_put(opendata); 2731 return ret; 2732} 2733 2734static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2735{ 2736 struct nfs_server *server = NFS_SERVER(state->inode); 2737 struct nfs4_exception exception = { }; 2738 int err; 2739 2740 do { 2741 err = _nfs4_open_expired(ctx, state); 2742 trace_nfs4_open_expired(ctx, 0, err); 2743 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2744 continue; 2745 switch (err) { 2746 default: 2747 goto out; 2748 case -NFS4ERR_GRACE: 2749 case -NFS4ERR_DELAY: 2750 nfs4_handle_exception(server, err, &exception); 2751 err = 0; 2752 } 2753 } while (exception.retry); 2754out: 2755 return err; 2756} 2757 2758static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2759{ 2760 struct nfs_open_context *ctx; 2761 int ret; 2762 2763 ctx = nfs4_state_find_open_context(state); 2764 if (IS_ERR(ctx)) 2765 return -EAGAIN; 2766 ret = nfs4_do_open_expired(ctx, state); 2767 put_nfs_open_context(ctx); 2768 return ret; 2769} 2770 2771static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2772 const nfs4_stateid *stateid) 2773{ 2774 nfs_remove_bad_delegation(state->inode, stateid); 2775 nfs_state_clear_delegation(state); 2776} 2777 2778static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2779{ 2780 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2781 nfs_finish_clear_delegation_stateid(state, NULL); 2782} 2783 2784static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2785{ 2786 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2787 nfs40_clear_delegation_stateid(state); 2788 nfs_state_clear_open_state_flags(state); 2789 return nfs4_open_expired(sp, state); 2790} 2791 2792static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2793 nfs4_stateid *stateid, 2794 const struct cred *cred) 2795{ 2796 return -NFS4ERR_BAD_STATEID; 2797} 2798 2799#if defined(CONFIG_NFS_V4_1) 2800static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2801 nfs4_stateid *stateid, 2802 const struct cred *cred) 2803{ 2804 int status; 2805 2806 switch (stateid->type) { 2807 default: 2808 break; 2809 case NFS4_INVALID_STATEID_TYPE: 2810 case NFS4_SPECIAL_STATEID_TYPE: 2811 return -NFS4ERR_BAD_STATEID; 2812 case NFS4_REVOKED_STATEID_TYPE: 2813 goto out_free; 2814 } 2815 2816 status = nfs41_test_stateid(server, stateid, cred); 2817 switch (status) { 2818 case -NFS4ERR_EXPIRED: 2819 case -NFS4ERR_ADMIN_REVOKED: 2820 case -NFS4ERR_DELEG_REVOKED: 2821 break; 2822 default: 2823 return status; 2824 } 2825out_free: 2826 /* Ack the revoked state to the server */ 2827 nfs41_free_stateid(server, stateid, cred, true); 2828 return -NFS4ERR_EXPIRED; 2829} 2830 2831static int nfs41_check_delegation_stateid(struct nfs4_state *state) 2832{ 2833 struct nfs_server *server = NFS_SERVER(state->inode); 2834 nfs4_stateid stateid; 2835 struct nfs_delegation *delegation; 2836 const struct cred *cred = NULL; 2837 int status, ret = NFS_OK; 2838 2839 /* Get the delegation credential for use by test/free_stateid */ 2840 rcu_read_lock(); 2841 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2842 if (delegation == NULL) { 2843 rcu_read_unlock(); 2844 nfs_state_clear_delegation(state); 2845 return NFS_OK; 2846 } 2847 2848 spin_lock(&delegation->lock); 2849 nfs4_stateid_copy(&stateid, &delegation->stateid); 2850 2851 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2852 &delegation->flags)) { 2853 spin_unlock(&delegation->lock); 2854 rcu_read_unlock(); 2855 return NFS_OK; 2856 } 2857 2858 if (delegation->cred) 2859 cred = get_cred(delegation->cred); 2860 spin_unlock(&delegation->lock); 2861 rcu_read_unlock(); 2862 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2863 trace_nfs4_test_delegation_stateid(state, NULL, status); 2864 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2865 nfs_finish_clear_delegation_stateid(state, &stateid); 2866 else 2867 ret = status; 2868 2869 put_cred(cred); 2870 return ret; 2871} 2872 2873static void nfs41_delegation_recover_stateid(struct nfs4_state *state) 2874{ 2875 nfs4_stateid tmp; 2876 2877 if (test_bit(NFS_DELEGATED_STATE, &state->flags) && 2878 nfs4_copy_delegation_stateid(state->inode, state->state, 2879 &tmp, NULL) && 2880 nfs4_stateid_match_other(&state->stateid, &tmp)) 2881 nfs_state_set_delegation(state, &tmp, state->state); 2882 else 2883 nfs_state_clear_delegation(state); 2884} 2885 2886/** 2887 * nfs41_check_expired_locks - possibly free a lock stateid 2888 * 2889 * @state: NFSv4 state for an inode 2890 * 2891 * Returns NFS_OK if recovery for this stateid is now finished. 2892 * Otherwise a negative NFS4ERR value is returned. 2893 */ 2894static int nfs41_check_expired_locks(struct nfs4_state *state) 2895{ 2896 int status, ret = NFS_OK; 2897 struct nfs4_lock_state *lsp, *prev = NULL; 2898 struct nfs_server *server = NFS_SERVER(state->inode); 2899 2900 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2901 goto out; 2902 2903 spin_lock(&state->state_lock); 2904 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2905 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2906 const struct cred *cred = lsp->ls_state->owner->so_cred; 2907 2908 refcount_inc(&lsp->ls_count); 2909 spin_unlock(&state->state_lock); 2910 2911 nfs4_put_lock_state(prev); 2912 prev = lsp; 2913 2914 status = nfs41_test_and_free_expired_stateid(server, 2915 &lsp->ls_stateid, 2916 cred); 2917 trace_nfs4_test_lock_stateid(state, lsp, status); 2918 if (status == -NFS4ERR_EXPIRED || 2919 status == -NFS4ERR_BAD_STATEID) { 2920 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2921 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2922 if (!recover_lost_locks) 2923 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2924 } else if (status != NFS_OK) { 2925 ret = status; 2926 nfs4_put_lock_state(prev); 2927 goto out; 2928 } 2929 spin_lock(&state->state_lock); 2930 } 2931 } 2932 spin_unlock(&state->state_lock); 2933 nfs4_put_lock_state(prev); 2934out: 2935 return ret; 2936} 2937 2938/** 2939 * nfs41_check_open_stateid - possibly free an open stateid 2940 * 2941 * @state: NFSv4 state for an inode 2942 * 2943 * Returns NFS_OK if recovery for this stateid is now finished. 2944 * Otherwise a negative NFS4ERR value is returned. 2945 */ 2946static int nfs41_check_open_stateid(struct nfs4_state *state) 2947{ 2948 struct nfs_server *server = NFS_SERVER(state->inode); 2949 nfs4_stateid *stateid = &state->open_stateid; 2950 const struct cred *cred = state->owner->so_cred; 2951 int status; 2952 2953 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) 2954 return -NFS4ERR_BAD_STATEID; 2955 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2956 trace_nfs4_test_open_stateid(state, NULL, status); 2957 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2958 nfs_state_clear_open_state_flags(state); 2959 stateid->type = NFS4_INVALID_STATEID_TYPE; 2960 return status; 2961 } 2962 if (nfs_open_stateid_recover_openmode(state)) 2963 return -NFS4ERR_OPENMODE; 2964 return NFS_OK; 2965} 2966 2967static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2968{ 2969 int status; 2970 2971 status = nfs41_check_delegation_stateid(state); 2972 if (status != NFS_OK) 2973 return status; 2974 nfs41_delegation_recover_stateid(state); 2975 2976 status = nfs41_check_expired_locks(state); 2977 if (status != NFS_OK) 2978 return status; 2979 status = nfs41_check_open_stateid(state); 2980 if (status != NFS_OK) 2981 status = nfs4_open_expired(sp, state); 2982 return status; 2983} 2984#endif 2985 2986/* 2987 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2988 * fields corresponding to attributes that were used to store the verifier. 2989 * Make sure we clobber those fields in the later setattr call 2990 */ 2991static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 2992 struct iattr *sattr, struct nfs4_label **label) 2993{ 2994 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 2995 __u32 attrset[3]; 2996 unsigned ret; 2997 unsigned i; 2998 2999 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 3000 attrset[i] = opendata->o_res.attrset[i]; 3001 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 3002 attrset[i] &= ~bitmask[i]; 3003 } 3004 3005 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 3006 sattr->ia_valid : 0; 3007 3008 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 3009 if (sattr->ia_valid & ATTR_ATIME_SET) 3010 ret |= ATTR_ATIME_SET; 3011 else 3012 ret |= ATTR_ATIME; 3013 } 3014 3015 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 3016 if (sattr->ia_valid & ATTR_MTIME_SET) 3017 ret |= ATTR_MTIME_SET; 3018 else 3019 ret |= ATTR_MTIME; 3020 } 3021 3022 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 3023 *label = NULL; 3024 return ret; 3025} 3026 3027static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 3028 int flags, struct nfs_open_context *ctx) 3029{ 3030 struct nfs4_state_owner *sp = opendata->owner; 3031 struct nfs_server *server = sp->so_server; 3032 struct dentry *dentry; 3033 struct nfs4_state *state; 3034 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); 3035 struct inode *dir = d_inode(opendata->dir); 3036 unsigned long dir_verifier; 3037 unsigned int seq; 3038 int ret; 3039 3040 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 3041 dir_verifier = nfs_save_change_attribute(dir); 3042 3043 ret = _nfs4_proc_open(opendata, ctx); 3044 if (ret != 0) 3045 goto out; 3046 3047 state = _nfs4_opendata_to_nfs4_state(opendata); 3048 ret = PTR_ERR(state); 3049 if (IS_ERR(state)) 3050 goto out; 3051 ctx->state = state; 3052 if (server->caps & NFS_CAP_POSIX_LOCK) 3053 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 3054 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 3055 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 3056 3057 dentry = opendata->dentry; 3058 if (d_really_is_negative(dentry)) { 3059 struct dentry *alias; 3060 d_drop(dentry); 3061 alias = d_exact_alias(dentry, state->inode); 3062 if (!alias) 3063 alias = d_splice_alias(igrab(state->inode), dentry); 3064 /* d_splice_alias() can't fail here - it's a non-directory */ 3065 if (alias) { 3066 dput(ctx->dentry); 3067 ctx->dentry = dentry = alias; 3068 } 3069 } 3070 3071 switch(opendata->o_arg.claim) { 3072 default: 3073 break; 3074 case NFS4_OPEN_CLAIM_NULL: 3075 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 3076 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 3077 if (!opendata->rpc_done) 3078 break; 3079 if (opendata->o_res.delegation_type != 0) 3080 dir_verifier = nfs_save_change_attribute(dir); 3081 nfs_set_verifier(dentry, dir_verifier); 3082 } 3083 3084 /* Parse layoutget results before we check for access */ 3085 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 3086 3087 ret = nfs4_opendata_access(sp->so_cred, opendata, state, 3088 acc_mode, flags); 3089 if (ret != 0) 3090 goto out; 3091 3092 if (d_inode(dentry) == state->inode) { 3093 nfs_inode_attach_open_context(ctx); 3094 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 3095 nfs4_schedule_stateid_recovery(server, state); 3096 } 3097 3098out: 3099 if (!opendata->cancelled) { 3100 if (opendata->lgp) { 3101 nfs4_lgopen_release(opendata->lgp); 3102 opendata->lgp = NULL; 3103 } 3104 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 3105 } 3106 return ret; 3107} 3108 3109/* 3110 * Returns a referenced nfs4_state 3111 */ 3112static int _nfs4_do_open(struct inode *dir, 3113 struct nfs_open_context *ctx, 3114 int flags, 3115 const struct nfs4_open_createattrs *c, 3116 int *opened) 3117{ 3118 struct nfs4_state_owner *sp; 3119 struct nfs4_state *state = NULL; 3120 struct nfs_server *server = NFS_SERVER(dir); 3121 struct nfs4_opendata *opendata; 3122 struct dentry *dentry = ctx->dentry; 3123 const struct cred *cred = ctx->cred; 3124 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 3125 fmode_t fmode = _nfs4_ctx_to_openmode(ctx); 3126 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 3127 struct iattr *sattr = c->sattr; 3128 struct nfs4_label *label = c->label; 3129 struct nfs4_label *olabel = NULL; 3130 int status; 3131 3132 /* Protect against reboot recovery conflicts */ 3133 status = -ENOMEM; 3134 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 3135 if (sp == NULL) { 3136 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 3137 goto out_err; 3138 } 3139 status = nfs4_client_recover_expired_lease(server->nfs_client); 3140 if (status != 0) 3141 goto err_put_state_owner; 3142 if (d_really_is_positive(dentry)) 3143 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 3144 status = -ENOMEM; 3145 if (d_really_is_positive(dentry)) 3146 claim = NFS4_OPEN_CLAIM_FH; 3147 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 3148 c, claim, GFP_KERNEL); 3149 if (opendata == NULL) 3150 goto err_put_state_owner; 3151 3152 if (label) { 3153 olabel = nfs4_label_alloc(server, GFP_KERNEL); 3154 if (IS_ERR(olabel)) { 3155 status = PTR_ERR(olabel); 3156 goto err_opendata_put; 3157 } 3158 } 3159 3160 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 3161 if (!opendata->f_attr.mdsthreshold) { 3162 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 3163 if (!opendata->f_attr.mdsthreshold) 3164 goto err_free_label; 3165 } 3166 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 3167 } 3168 if (d_really_is_positive(dentry)) 3169 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3170 3171 status = _nfs4_open_and_get_state(opendata, flags, ctx); 3172 if (status != 0) 3173 goto err_free_label; 3174 state = ctx->state; 3175 3176 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3177 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3178 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3179 /* 3180 * send create attributes which was not set by open 3181 * with an extra setattr. 3182 */ 3183 if (attrs || label) { 3184 unsigned ia_old = sattr->ia_valid; 3185 3186 sattr->ia_valid = attrs; 3187 nfs_fattr_init(opendata->o_res.f_attr); 3188 status = nfs4_do_setattr(state->inode, cred, 3189 opendata->o_res.f_attr, sattr, 3190 ctx, label, olabel); 3191 if (status == 0) { 3192 nfs_setattr_update_inode(state->inode, sattr, 3193 opendata->o_res.f_attr); 3194 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); 3195 } 3196 sattr->ia_valid = ia_old; 3197 } 3198 } 3199 if (opened && opendata->file_created) 3200 *opened = 1; 3201 3202 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3203 *ctx_th = opendata->f_attr.mdsthreshold; 3204 opendata->f_attr.mdsthreshold = NULL; 3205 } 3206 3207 nfs4_label_free(olabel); 3208 3209 nfs4_opendata_put(opendata); 3210 nfs4_put_state_owner(sp); 3211 return 0; 3212err_free_label: 3213 nfs4_label_free(olabel); 3214err_opendata_put: 3215 nfs4_opendata_put(opendata); 3216err_put_state_owner: 3217 nfs4_put_state_owner(sp); 3218out_err: 3219 return status; 3220} 3221 3222 3223static struct nfs4_state *nfs4_do_open(struct inode *dir, 3224 struct nfs_open_context *ctx, 3225 int flags, 3226 struct iattr *sattr, 3227 struct nfs4_label *label, 3228 int *opened) 3229{ 3230 struct nfs_server *server = NFS_SERVER(dir); 3231 struct nfs4_exception exception = { 3232 .interruptible = true, 3233 }; 3234 struct nfs4_state *res; 3235 struct nfs4_open_createattrs c = { 3236 .label = label, 3237 .sattr = sattr, 3238 .verf = { 3239 [0] = (__u32)jiffies, 3240 [1] = (__u32)current->pid, 3241 }, 3242 }; 3243 int status; 3244 3245 do { 3246 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3247 res = ctx->state; 3248 trace_nfs4_open_file(ctx, flags, status); 3249 if (status == 0) 3250 break; 3251 /* NOTE: BAD_SEQID means the server and client disagree about the 3252 * book-keeping w.r.t. state-changing operations 3253 * (OPEN/CLOSE/LOCK/LOCKU...) 3254 * It is actually a sign of a bug on the client or on the server. 3255 * 3256 * If we receive a BAD_SEQID error in the particular case of 3257 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3258 * have unhashed the old state_owner for us, and that we can 3259 * therefore safely retry using a new one. We should still warn 3260 * the user though... 3261 */ 3262 if (status == -NFS4ERR_BAD_SEQID) { 3263 pr_warn_ratelimited("NFS: v4 server %s " 3264 " returned a bad sequence-id error!\n", 3265 NFS_SERVER(dir)->nfs_client->cl_hostname); 3266 exception.retry = 1; 3267 continue; 3268 } 3269 /* 3270 * BAD_STATEID on OPEN means that the server cancelled our 3271 * state before it received the OPEN_CONFIRM. 3272 * Recover by retrying the request as per the discussion 3273 * on Page 181 of RFC3530. 3274 */ 3275 if (status == -NFS4ERR_BAD_STATEID) { 3276 exception.retry = 1; 3277 continue; 3278 } 3279 if (status == -NFS4ERR_EXPIRED) { 3280 nfs4_schedule_lease_recovery(server->nfs_client); 3281 exception.retry = 1; 3282 continue; 3283 } 3284 if (status == -EAGAIN) { 3285 /* We must have found a delegation */ 3286 exception.retry = 1; 3287 continue; 3288 } 3289 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3290 continue; 3291 res = ERR_PTR(nfs4_handle_exception(server, 3292 status, &exception)); 3293 } while (exception.retry); 3294 return res; 3295} 3296 3297static int _nfs4_do_setattr(struct inode *inode, 3298 struct nfs_setattrargs *arg, 3299 struct nfs_setattrres *res, 3300 const struct cred *cred, 3301 struct nfs_open_context *ctx) 3302{ 3303 struct nfs_server *server = NFS_SERVER(inode); 3304 struct rpc_message msg = { 3305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3306 .rpc_argp = arg, 3307 .rpc_resp = res, 3308 .rpc_cred = cred, 3309 }; 3310 const struct cred *delegation_cred = NULL; 3311 unsigned long timestamp = jiffies; 3312 bool truncate; 3313 int status; 3314 3315 nfs_fattr_init(res->fattr); 3316 3317 /* Servers should only apply open mode checks for file size changes */ 3318 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3319 if (!truncate) { 3320 nfs4_inode_make_writeable(inode); 3321 goto zero_stateid; 3322 } 3323 3324 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3325 /* Use that stateid */ 3326 } else if (ctx != NULL && ctx->state) { 3327 struct nfs_lock_context *l_ctx; 3328 if (!nfs4_valid_open_stateid(ctx->state)) 3329 return -EBADF; 3330 l_ctx = nfs_get_lock_context(ctx); 3331 if (IS_ERR(l_ctx)) 3332 return PTR_ERR(l_ctx); 3333 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3334 &arg->stateid, &delegation_cred); 3335 nfs_put_lock_context(l_ctx); 3336 if (status == -EIO) 3337 return -EBADF; 3338 else if (status == -EAGAIN) 3339 goto zero_stateid; 3340 } else { 3341zero_stateid: 3342 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3343 } 3344 if (delegation_cred) 3345 msg.rpc_cred = delegation_cred; 3346 3347 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3348 3349 put_cred(delegation_cred); 3350 if (status == 0 && ctx != NULL) 3351 renew_lease(server, timestamp); 3352 trace_nfs4_setattr(inode, &arg->stateid, status); 3353 return status; 3354} 3355 3356static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3357 struct nfs_fattr *fattr, struct iattr *sattr, 3358 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 3359 struct nfs4_label *olabel) 3360{ 3361 struct nfs_server *server = NFS_SERVER(inode); 3362 __u32 bitmask[NFS4_BITMASK_SZ]; 3363 struct nfs4_state *state = ctx ? ctx->state : NULL; 3364 struct nfs_setattrargs arg = { 3365 .fh = NFS_FH(inode), 3366 .iap = sattr, 3367 .server = server, 3368 .bitmask = bitmask, 3369 .label = ilabel, 3370 }; 3371 struct nfs_setattrres res = { 3372 .fattr = fattr, 3373 .label = olabel, 3374 .server = server, 3375 }; 3376 struct nfs4_exception exception = { 3377 .state = state, 3378 .inode = inode, 3379 .stateid = &arg.stateid, 3380 }; 3381 int err; 3382 3383 do { 3384 nfs4_bitmap_copy_adjust_setattr(bitmask, 3385 nfs4_bitmask(server, olabel), 3386 inode); 3387 3388 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3389 switch (err) { 3390 case -NFS4ERR_OPENMODE: 3391 if (!(sattr->ia_valid & ATTR_SIZE)) { 3392 pr_warn_once("NFSv4: server %s is incorrectly " 3393 "applying open mode checks to " 3394 "a SETATTR that is not " 3395 "changing file size.\n", 3396 server->nfs_client->cl_hostname); 3397 } 3398 if (state && !(state->state & FMODE_WRITE)) { 3399 err = -EBADF; 3400 if (sattr->ia_valid & ATTR_OPEN) 3401 err = -EACCES; 3402 goto out; 3403 } 3404 } 3405 err = nfs4_handle_exception(server, err, &exception); 3406 } while (exception.retry); 3407out: 3408 return err; 3409} 3410 3411static bool 3412nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3413{ 3414 if (inode == NULL || !nfs_have_layout(inode)) 3415 return false; 3416 3417 return pnfs_wait_on_layoutreturn(inode, task); 3418} 3419 3420/* 3421 * Update the seqid of an open stateid 3422 */ 3423static void nfs4_sync_open_stateid(nfs4_stateid *dst, 3424 struct nfs4_state *state) 3425{ 3426 __be32 seqid_open; 3427 u32 dst_seqid; 3428 int seq; 3429 3430 for (;;) { 3431 if (!nfs4_valid_open_stateid(state)) 3432 break; 3433 seq = read_seqbegin(&state->seqlock); 3434 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3435 nfs4_stateid_copy(dst, &state->open_stateid); 3436 if (read_seqretry(&state->seqlock, seq)) 3437 continue; 3438 break; 3439 } 3440 seqid_open = state->open_stateid.seqid; 3441 if (read_seqretry(&state->seqlock, seq)) 3442 continue; 3443 3444 dst_seqid = be32_to_cpu(dst->seqid); 3445 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) 3446 dst->seqid = seqid_open; 3447 break; 3448 } 3449} 3450 3451/* 3452 * Update the seqid of an open stateid after receiving 3453 * NFS4ERR_OLD_STATEID 3454 */ 3455static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, 3456 struct nfs4_state *state) 3457{ 3458 __be32 seqid_open; 3459 u32 dst_seqid; 3460 bool ret; 3461 int seq, status = -EAGAIN; 3462 DEFINE_WAIT(wait); 3463 3464 for (;;) { 3465 ret = false; 3466 if (!nfs4_valid_open_stateid(state)) 3467 break; 3468 seq = read_seqbegin(&state->seqlock); 3469 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3470 if (read_seqretry(&state->seqlock, seq)) 3471 continue; 3472 break; 3473 } 3474 3475 write_seqlock(&state->seqlock); 3476 seqid_open = state->open_stateid.seqid; 3477 3478 dst_seqid = be32_to_cpu(dst->seqid); 3479 3480 /* Did another OPEN bump the state's seqid? try again: */ 3481 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) { 3482 dst->seqid = seqid_open; 3483 write_sequnlock(&state->seqlock); 3484 ret = true; 3485 break; 3486 } 3487 3488 /* server says we're behind but we haven't seen the update yet */ 3489 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 3490 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 3491 write_sequnlock(&state->seqlock); 3492 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0); 3493 3494 if (fatal_signal_pending(current)) 3495 status = -EINTR; 3496 else 3497 if (schedule_timeout(5*HZ) != 0) 3498 status = 0; 3499 3500 finish_wait(&state->waitq, &wait); 3501 3502 if (!status) 3503 continue; 3504 if (status == -EINTR) 3505 break; 3506 3507 /* we slept the whole 5 seconds, we must have lost a seqid */ 3508 dst->seqid = cpu_to_be32(dst_seqid + 1); 3509 ret = true; 3510 break; 3511 } 3512 3513 return ret; 3514} 3515 3516struct nfs4_closedata { 3517 struct inode *inode; 3518 struct nfs4_state *state; 3519 struct nfs_closeargs arg; 3520 struct nfs_closeres res; 3521 struct { 3522 struct nfs4_layoutreturn_args arg; 3523 struct nfs4_layoutreturn_res res; 3524 struct nfs4_xdr_opaque_data ld_private; 3525 u32 roc_barrier; 3526 bool roc; 3527 } lr; 3528 struct nfs_fattr fattr; 3529 unsigned long timestamp; 3530}; 3531 3532static void nfs4_free_closedata(void *data) 3533{ 3534 struct nfs4_closedata *calldata = data; 3535 struct nfs4_state_owner *sp = calldata->state->owner; 3536 struct super_block *sb = calldata->state->inode->i_sb; 3537 3538 if (calldata->lr.roc) 3539 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3540 calldata->res.lr_ret); 3541 nfs4_put_open_state(calldata->state); 3542 nfs_free_seqid(calldata->arg.seqid); 3543 nfs4_put_state_owner(sp); 3544 nfs_sb_deactive(sb); 3545 kfree(calldata); 3546} 3547 3548static void nfs4_close_done(struct rpc_task *task, void *data) 3549{ 3550 struct nfs4_closedata *calldata = data; 3551 struct nfs4_state *state = calldata->state; 3552 struct nfs_server *server = NFS_SERVER(calldata->inode); 3553 nfs4_stateid *res_stateid = NULL; 3554 struct nfs4_exception exception = { 3555 .state = state, 3556 .inode = calldata->inode, 3557 .stateid = &calldata->arg.stateid, 3558 }; 3559 3560 dprintk("%s: begin!\n", __func__); 3561 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3562 return; 3563 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3564 3565 /* Handle Layoutreturn errors */ 3566 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res, 3567 &calldata->res.lr_ret) == -EAGAIN) 3568 goto out_restart; 3569 3570 /* hmm. we are done with the inode, and in the process of freeing 3571 * the state_owner. we keep this around to process errors 3572 */ 3573 switch (task->tk_status) { 3574 case 0: 3575 res_stateid = &calldata->res.stateid; 3576 renew_lease(server, calldata->timestamp); 3577 break; 3578 case -NFS4ERR_ACCESS: 3579 if (calldata->arg.bitmask != NULL) { 3580 calldata->arg.bitmask = NULL; 3581 calldata->res.fattr = NULL; 3582 goto out_restart; 3583 3584 } 3585 break; 3586 case -NFS4ERR_OLD_STATEID: 3587 /* Did we race with OPEN? */ 3588 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, 3589 state)) 3590 goto out_restart; 3591 goto out_release; 3592 case -NFS4ERR_ADMIN_REVOKED: 3593 case -NFS4ERR_STALE_STATEID: 3594 case -NFS4ERR_EXPIRED: 3595 nfs4_free_revoked_stateid(server, 3596 &calldata->arg.stateid, 3597 task->tk_msg.rpc_cred); 3598 fallthrough; 3599 case -NFS4ERR_BAD_STATEID: 3600 if (calldata->arg.fmode == 0) 3601 break; 3602 fallthrough; 3603 default: 3604 task->tk_status = nfs4_async_handle_exception(task, 3605 server, task->tk_status, &exception); 3606 if (exception.retry) 3607 goto out_restart; 3608 } 3609 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3610 res_stateid, calldata->arg.fmode); 3611out_release: 3612 task->tk_status = 0; 3613 nfs_release_seqid(calldata->arg.seqid); 3614 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3615 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); 3616 return; 3617out_restart: 3618 task->tk_status = 0; 3619 rpc_restart_call_prepare(task); 3620 goto out_release; 3621} 3622 3623static void nfs4_close_prepare(struct rpc_task *task, void *data) 3624{ 3625 struct nfs4_closedata *calldata = data; 3626 struct nfs4_state *state = calldata->state; 3627 struct inode *inode = calldata->inode; 3628 struct nfs_server *server = NFS_SERVER(inode); 3629 struct pnfs_layout_hdr *lo; 3630 bool is_rdonly, is_wronly, is_rdwr; 3631 int call_close = 0; 3632 3633 dprintk("%s: begin!\n", __func__); 3634 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3635 goto out_wait; 3636 3637 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3638 spin_lock(&state->owner->so_lock); 3639 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3640 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3641 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3642 /* Calculate the change in open mode */ 3643 calldata->arg.fmode = 0; 3644 if (state->n_rdwr == 0) { 3645 if (state->n_rdonly == 0) 3646 call_close |= is_rdonly; 3647 else if (is_rdonly) 3648 calldata->arg.fmode |= FMODE_READ; 3649 if (state->n_wronly == 0) 3650 call_close |= is_wronly; 3651 else if (is_wronly) 3652 calldata->arg.fmode |= FMODE_WRITE; 3653 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3654 call_close |= is_rdwr; 3655 } else if (is_rdwr) 3656 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3657 3658 nfs4_sync_open_stateid(&calldata->arg.stateid, state); 3659 if (!nfs4_valid_open_stateid(state)) 3660 call_close = 0; 3661 spin_unlock(&state->owner->so_lock); 3662 3663 if (!call_close) { 3664 /* Note: exit _without_ calling nfs4_close_done */ 3665 goto out_no_action; 3666 } 3667 3668 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3669 nfs_release_seqid(calldata->arg.seqid); 3670 goto out_wait; 3671 } 3672 3673 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3674 if (lo && !pnfs_layout_is_valid(lo)) { 3675 calldata->arg.lr_args = NULL; 3676 calldata->res.lr_res = NULL; 3677 } 3678 3679 if (calldata->arg.fmode == 0) 3680 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3681 3682 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3683 /* Close-to-open cache consistency revalidation */ 3684 if (!nfs4_have_delegation(inode, FMODE_READ)) { 3685 nfs4_bitmask_set(calldata->arg.bitmask_store, 3686 server->cache_consistency_bitmask, 3687 inode, server, NULL); 3688 calldata->arg.bitmask = calldata->arg.bitmask_store; 3689 } else 3690 calldata->arg.bitmask = NULL; 3691 } 3692 3693 calldata->arg.share_access = 3694 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3695 calldata->arg.fmode, 0); 3696 3697 if (calldata->res.fattr == NULL) 3698 calldata->arg.bitmask = NULL; 3699 else if (calldata->arg.bitmask == NULL) 3700 calldata->res.fattr = NULL; 3701 calldata->timestamp = jiffies; 3702 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3703 &calldata->arg.seq_args, 3704 &calldata->res.seq_res, 3705 task) != 0) 3706 nfs_release_seqid(calldata->arg.seqid); 3707 dprintk("%s: done!\n", __func__); 3708 return; 3709out_no_action: 3710 task->tk_action = NULL; 3711out_wait: 3712 nfs4_sequence_done(task, &calldata->res.seq_res); 3713} 3714 3715static const struct rpc_call_ops nfs4_close_ops = { 3716 .rpc_call_prepare = nfs4_close_prepare, 3717 .rpc_call_done = nfs4_close_done, 3718 .rpc_release = nfs4_free_closedata, 3719}; 3720 3721/* 3722 * It is possible for data to be read/written from a mem-mapped file 3723 * after the sys_close call (which hits the vfs layer as a flush). 3724 * This means that we can't safely call nfsv4 close on a file until 3725 * the inode is cleared. This in turn means that we are not good 3726 * NFSv4 citizens - we do not indicate to the server to update the file's 3727 * share state even when we are done with one of the three share 3728 * stateid's in the inode. 3729 * 3730 * NOTE: Caller must be holding the sp->so_owner semaphore! 3731 */ 3732int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3733{ 3734 struct nfs_server *server = NFS_SERVER(state->inode); 3735 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3736 struct nfs4_closedata *calldata; 3737 struct nfs4_state_owner *sp = state->owner; 3738 struct rpc_task *task; 3739 struct rpc_message msg = { 3740 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3741 .rpc_cred = state->owner->so_cred, 3742 }; 3743 struct rpc_task_setup task_setup_data = { 3744 .rpc_client = server->client, 3745 .rpc_message = &msg, 3746 .callback_ops = &nfs4_close_ops, 3747 .workqueue = nfsiod_workqueue, 3748 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 3749 }; 3750 int status = -ENOMEM; 3751 3752 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3753 &task_setup_data.rpc_client, &msg); 3754 3755 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3756 if (calldata == NULL) 3757 goto out; 3758 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3759 calldata->inode = state->inode; 3760 calldata->state = state; 3761 calldata->arg.fh = NFS_FH(state->inode); 3762 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3763 goto out_free_calldata; 3764 /* Serialization for the sequence id */ 3765 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3766 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3767 if (IS_ERR(calldata->arg.seqid)) 3768 goto out_free_calldata; 3769 nfs_fattr_init(&calldata->fattr); 3770 calldata->arg.fmode = 0; 3771 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3772 calldata->res.fattr = &calldata->fattr; 3773 calldata->res.seqid = calldata->arg.seqid; 3774 calldata->res.server = server; 3775 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3776 calldata->lr.roc = pnfs_roc(state->inode, 3777 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3778 if (calldata->lr.roc) { 3779 calldata->arg.lr_args = &calldata->lr.arg; 3780 calldata->res.lr_res = &calldata->lr.res; 3781 } 3782 nfs_sb_active(calldata->inode->i_sb); 3783 3784 msg.rpc_argp = &calldata->arg; 3785 msg.rpc_resp = &calldata->res; 3786 task_setup_data.callback_data = calldata; 3787 task = rpc_run_task(&task_setup_data); 3788 if (IS_ERR(task)) 3789 return PTR_ERR(task); 3790 status = 0; 3791 if (wait) 3792 status = rpc_wait_for_completion_task(task); 3793 rpc_put_task(task); 3794 return status; 3795out_free_calldata: 3796 kfree(calldata); 3797out: 3798 nfs4_put_open_state(state); 3799 nfs4_put_state_owner(sp); 3800 return status; 3801} 3802 3803static struct inode * 3804nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3805 int open_flags, struct iattr *attr, int *opened) 3806{ 3807 struct nfs4_state *state; 3808 struct nfs4_label l, *label; 3809 3810 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3811 3812 /* Protect against concurrent sillydeletes */ 3813 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3814 3815 nfs4_label_release_security(label); 3816 3817 if (IS_ERR(state)) 3818 return ERR_CAST(state); 3819 return state->inode; 3820} 3821 3822static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3823{ 3824 if (ctx->state == NULL) 3825 return; 3826 if (is_sync) 3827 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3828 else 3829 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3830} 3831 3832#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3833#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3834#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL) 3835 3836static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3837{ 3838 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3839 struct nfs4_server_caps_arg args = { 3840 .fhandle = fhandle, 3841 .bitmask = bitmask, 3842 }; 3843 struct nfs4_server_caps_res res = {}; 3844 struct rpc_message msg = { 3845 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3846 .rpc_argp = &args, 3847 .rpc_resp = &res, 3848 }; 3849 int status; 3850 int i; 3851 3852 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3853 FATTR4_WORD0_FH_EXPIRE_TYPE | 3854 FATTR4_WORD0_LINK_SUPPORT | 3855 FATTR4_WORD0_SYMLINK_SUPPORT | 3856 FATTR4_WORD0_ACLSUPPORT; 3857 if (minorversion) 3858 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3859 3860 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3861 if (status == 0) { 3862 /* Sanity check the server answers */ 3863 switch (minorversion) { 3864 case 0: 3865 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3866 res.attr_bitmask[2] = 0; 3867 break; 3868 case 1: 3869 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3870 break; 3871 case 2: 3872 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3873 } 3874 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3875 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| 3876 NFS_CAP_SYMLINKS|NFS_CAP_FILEID| 3877 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| 3878 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| 3879 NFS_CAP_CTIME|NFS_CAP_MTIME| 3880 NFS_CAP_SECURITY_LABEL); 3881 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3882 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3883 server->caps |= NFS_CAP_ACLS; 3884 if (res.has_links != 0) 3885 server->caps |= NFS_CAP_HARDLINKS; 3886 if (res.has_symlinks != 0) 3887 server->caps |= NFS_CAP_SYMLINKS; 3888 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) 3889 server->caps |= NFS_CAP_FILEID; 3890 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) 3891 server->caps |= NFS_CAP_MODE; 3892 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) 3893 server->caps |= NFS_CAP_NLINK; 3894 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) 3895 server->caps |= NFS_CAP_OWNER; 3896 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) 3897 server->caps |= NFS_CAP_OWNER_GROUP; 3898 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) 3899 server->caps |= NFS_CAP_ATIME; 3900 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) 3901 server->caps |= NFS_CAP_CTIME; 3902 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) 3903 server->caps |= NFS_CAP_MTIME; 3904#ifdef CONFIG_NFS_V4_SECURITY_LABEL 3905 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3906 server->caps |= NFS_CAP_SECURITY_LABEL; 3907#endif 3908 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3909 sizeof(server->attr_bitmask)); 3910 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3911 3912 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3913 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3914 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3915 server->cache_consistency_bitmask[2] = 0; 3916 3917 /* Avoid a regression due to buggy server */ 3918 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3919 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3920 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3921 sizeof(server->exclcreat_bitmask)); 3922 3923 server->acl_bitmask = res.acl_bitmask; 3924 server->fh_expire_type = res.fh_expire_type; 3925 } 3926 3927 return status; 3928} 3929 3930int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3931{ 3932 struct nfs4_exception exception = { 3933 .interruptible = true, 3934 }; 3935 int err; 3936 do { 3937 err = nfs4_handle_exception(server, 3938 _nfs4_server_capabilities(server, fhandle), 3939 &exception); 3940 } while (exception.retry); 3941 return err; 3942} 3943 3944static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3945 struct nfs_fsinfo *info) 3946{ 3947 u32 bitmask[3]; 3948 struct nfs4_lookup_root_arg args = { 3949 .bitmask = bitmask, 3950 }; 3951 struct nfs4_lookup_res res = { 3952 .server = server, 3953 .fattr = info->fattr, 3954 .fh = fhandle, 3955 }; 3956 struct rpc_message msg = { 3957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 3958 .rpc_argp = &args, 3959 .rpc_resp = &res, 3960 }; 3961 3962 bitmask[0] = nfs4_fattr_bitmap[0]; 3963 bitmask[1] = nfs4_fattr_bitmap[1]; 3964 /* 3965 * Process the label in the upcoming getfattr 3966 */ 3967 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 3968 3969 nfs_fattr_init(info->fattr); 3970 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3971} 3972 3973static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3974 struct nfs_fsinfo *info) 3975{ 3976 struct nfs4_exception exception = { 3977 .interruptible = true, 3978 }; 3979 int err; 3980 do { 3981 err = _nfs4_lookup_root(server, fhandle, info); 3982 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 3983 switch (err) { 3984 case 0: 3985 case -NFS4ERR_WRONGSEC: 3986 goto out; 3987 default: 3988 err = nfs4_handle_exception(server, err, &exception); 3989 } 3990 } while (exception.retry); 3991out: 3992 return err; 3993} 3994 3995static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3996 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 3997{ 3998 struct rpc_auth_create_args auth_args = { 3999 .pseudoflavor = flavor, 4000 }; 4001 struct rpc_auth *auth; 4002 4003 auth = rpcauth_create(&auth_args, server->client); 4004 if (IS_ERR(auth)) 4005 return -EACCES; 4006 return nfs4_lookup_root(server, fhandle, info); 4007} 4008 4009/* 4010 * Retry pseudoroot lookup with various security flavors. We do this when: 4011 * 4012 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 4013 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 4014 * 4015 * Returns zero on success, or a negative NFS4ERR value, or a 4016 * negative errno value. 4017 */ 4018static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4019 struct nfs_fsinfo *info) 4020{ 4021 /* Per 3530bis 15.33.5 */ 4022 static const rpc_authflavor_t flav_array[] = { 4023 RPC_AUTH_GSS_KRB5P, 4024 RPC_AUTH_GSS_KRB5I, 4025 RPC_AUTH_GSS_KRB5, 4026 RPC_AUTH_UNIX, /* courtesy */ 4027 RPC_AUTH_NULL, 4028 }; 4029 int status = -EPERM; 4030 size_t i; 4031 4032 if (server->auth_info.flavor_len > 0) { 4033 /* try each flavor specified by user */ 4034 for (i = 0; i < server->auth_info.flavor_len; i++) { 4035 status = nfs4_lookup_root_sec(server, fhandle, info, 4036 server->auth_info.flavors[i]); 4037 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4038 continue; 4039 break; 4040 } 4041 } else { 4042 /* no flavors specified by user, try default list */ 4043 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 4044 status = nfs4_lookup_root_sec(server, fhandle, info, 4045 flav_array[i]); 4046 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4047 continue; 4048 break; 4049 } 4050 } 4051 4052 /* 4053 * -EACCES could mean that the user doesn't have correct permissions 4054 * to access the mount. It could also mean that we tried to mount 4055 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 4056 * existing mount programs don't handle -EACCES very well so it should 4057 * be mapped to -EPERM instead. 4058 */ 4059 if (status == -EACCES) 4060 status = -EPERM; 4061 return status; 4062} 4063 4064/** 4065 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 4066 * @server: initialized nfs_server handle 4067 * @fhandle: we fill in the pseudo-fs root file handle 4068 * @info: we fill in an FSINFO struct 4069 * @auth_probe: probe the auth flavours 4070 * 4071 * Returns zero on success, or a negative errno. 4072 */ 4073int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 4074 struct nfs_fsinfo *info, 4075 bool auth_probe) 4076{ 4077 int status = 0; 4078 4079 if (!auth_probe) 4080 status = nfs4_lookup_root(server, fhandle, info); 4081 4082 if (auth_probe || status == NFS4ERR_WRONGSEC) 4083 status = server->nfs_client->cl_mvops->find_root_sec(server, 4084 fhandle, info); 4085 4086 if (status == 0) 4087 status = nfs4_server_capabilities(server, fhandle); 4088 if (status == 0) 4089 status = nfs4_do_fsinfo(server, fhandle, info); 4090 4091 return nfs4_map_errors(status); 4092} 4093 4094static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 4095 struct nfs_fsinfo *info) 4096{ 4097 int error; 4098 struct nfs_fattr *fattr = info->fattr; 4099 struct nfs4_label *label = fattr->label; 4100 4101 error = nfs4_server_capabilities(server, mntfh); 4102 if (error < 0) { 4103 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 4104 return error; 4105 } 4106 4107 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL); 4108 if (error < 0) { 4109 dprintk("nfs4_get_root: getattr error = %d\n", -error); 4110 goto out; 4111 } 4112 4113 if (fattr->valid & NFS_ATTR_FATTR_FSID && 4114 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 4115 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 4116 4117out: 4118 return error; 4119} 4120 4121/* 4122 * Get locations and (maybe) other attributes of a referral. 4123 * Note that we'll actually follow the referral later when 4124 * we detect fsid mismatch in inode revalidation 4125 */ 4126static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 4127 const struct qstr *name, struct nfs_fattr *fattr, 4128 struct nfs_fh *fhandle) 4129{ 4130 int status = -ENOMEM; 4131 struct page *page = NULL; 4132 struct nfs4_fs_locations *locations = NULL; 4133 4134 page = alloc_page(GFP_KERNEL); 4135 if (page == NULL) 4136 goto out; 4137 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4138 if (locations == NULL) 4139 goto out; 4140 4141 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4142 if (status != 0) 4143 goto out; 4144 4145 /* 4146 * If the fsid didn't change, this is a migration event, not a 4147 * referral. Cause us to drop into the exception handler, which 4148 * will kick off migration recovery. 4149 */ 4150 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 4151 dprintk("%s: server did not return a different fsid for" 4152 " a referral at %s\n", __func__, name->name); 4153 status = -NFS4ERR_MOVED; 4154 goto out; 4155 } 4156 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4157 nfs_fixup_referral_attributes(&locations->fattr); 4158 4159 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 4160 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 4161 memset(fhandle, 0, sizeof(struct nfs_fh)); 4162out: 4163 if (page) 4164 __free_page(page); 4165 kfree(locations); 4166 return status; 4167} 4168 4169static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4170 struct nfs_fattr *fattr, struct nfs4_label *label, 4171 struct inode *inode) 4172{ 4173 __u32 bitmask[NFS4_BITMASK_SZ]; 4174 struct nfs4_getattr_arg args = { 4175 .fh = fhandle, 4176 .bitmask = bitmask, 4177 }; 4178 struct nfs4_getattr_res res = { 4179 .fattr = fattr, 4180 .label = label, 4181 .server = server, 4182 }; 4183 struct rpc_message msg = { 4184 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4185 .rpc_argp = &args, 4186 .rpc_resp = &res, 4187 }; 4188 unsigned short task_flags = 0; 4189 4190 /* Is this is an attribute revalidation, subject to softreval? */ 4191 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 4192 task_flags |= RPC_TASK_TIMEOUT; 4193 4194 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode); 4195 4196 nfs_fattr_init(fattr); 4197 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4198 return nfs4_do_call_sync(server->client, server, &msg, 4199 &args.seq_args, &res.seq_res, task_flags); 4200} 4201 4202int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4203 struct nfs_fattr *fattr, struct nfs4_label *label, 4204 struct inode *inode) 4205{ 4206 struct nfs4_exception exception = { 4207 .interruptible = true, 4208 }; 4209 int err; 4210 do { 4211 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode); 4212 trace_nfs4_getattr(server, fhandle, fattr, err); 4213 err = nfs4_handle_exception(server, err, 4214 &exception); 4215 } while (exception.retry); 4216 return err; 4217} 4218 4219/* 4220 * The file is not closed if it is opened due to the a request to change 4221 * the size of the file. The open call will not be needed once the 4222 * VFS layer lookup-intents are implemented. 4223 * 4224 * Close is called when the inode is destroyed. 4225 * If we haven't opened the file for O_WRONLY, we 4226 * need to in the size_change case to obtain a stateid. 4227 * 4228 * Got race? 4229 * Because OPEN is always done by name in nfsv4, it is 4230 * possible that we opened a different file by the same 4231 * name. We can recognize this race condition, but we 4232 * can't do anything about it besides returning an error. 4233 * 4234 * This will be fixed with VFS changes (lookup-intent). 4235 */ 4236static int 4237nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4238 struct iattr *sattr) 4239{ 4240 struct inode *inode = d_inode(dentry); 4241 const struct cred *cred = NULL; 4242 struct nfs_open_context *ctx = NULL; 4243 struct nfs4_label *label = NULL; 4244 int status; 4245 4246 if (pnfs_ld_layoutret_on_setattr(inode) && 4247 sattr->ia_valid & ATTR_SIZE && 4248 sattr->ia_size < i_size_read(inode)) 4249 pnfs_commit_and_return_layout(inode); 4250 4251 nfs_fattr_init(fattr); 4252 4253 /* Deal with open(O_TRUNC) */ 4254 if (sattr->ia_valid & ATTR_OPEN) 4255 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4256 4257 /* Optimization: if the end result is no change, don't RPC */ 4258 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4259 return 0; 4260 4261 /* Search for an existing open(O_WRITE) file */ 4262 if (sattr->ia_valid & ATTR_FILE) { 4263 4264 ctx = nfs_file_open_context(sattr->ia_file); 4265 if (ctx) 4266 cred = ctx->cred; 4267 } 4268 4269 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 4270 if (IS_ERR(label)) 4271 return PTR_ERR(label); 4272 4273 /* Return any delegations if we're going to change ACLs */ 4274 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4275 nfs4_inode_make_writeable(inode); 4276 4277 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label); 4278 if (status == 0) { 4279 nfs_setattr_update_inode(inode, sattr, fattr); 4280 nfs_setsecurity(inode, fattr, label); 4281 } 4282 nfs4_label_free(label); 4283 return status; 4284} 4285 4286static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4287 struct dentry *dentry, struct nfs_fh *fhandle, 4288 struct nfs_fattr *fattr, struct nfs4_label *label) 4289{ 4290 struct nfs_server *server = NFS_SERVER(dir); 4291 int status; 4292 struct nfs4_lookup_arg args = { 4293 .bitmask = server->attr_bitmask, 4294 .dir_fh = NFS_FH(dir), 4295 .name = &dentry->d_name, 4296 }; 4297 struct nfs4_lookup_res res = { 4298 .server = server, 4299 .fattr = fattr, 4300 .label = label, 4301 .fh = fhandle, 4302 }; 4303 struct rpc_message msg = { 4304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4305 .rpc_argp = &args, 4306 .rpc_resp = &res, 4307 }; 4308 unsigned short task_flags = 0; 4309 4310 /* Is this is an attribute revalidation, subject to softreval? */ 4311 if (nfs_lookup_is_soft_revalidate(dentry)) 4312 task_flags |= RPC_TASK_TIMEOUT; 4313 4314 args.bitmask = nfs4_bitmask(server, label); 4315 4316 nfs_fattr_init(fattr); 4317 4318 dprintk("NFS call lookup %pd2\n", dentry); 4319 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4320 status = nfs4_do_call_sync(clnt, server, &msg, 4321 &args.seq_args, &res.seq_res, task_flags); 4322 dprintk("NFS reply lookup: %d\n", status); 4323 return status; 4324} 4325 4326static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4327{ 4328 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4329 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4330 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4331 fattr->nlink = 2; 4332} 4333 4334static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4335 struct dentry *dentry, struct nfs_fh *fhandle, 4336 struct nfs_fattr *fattr, struct nfs4_label *label) 4337{ 4338 struct nfs4_exception exception = { 4339 .interruptible = true, 4340 }; 4341 struct rpc_clnt *client = *clnt; 4342 const struct qstr *name = &dentry->d_name; 4343 int err; 4344 do { 4345 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr, label); 4346 trace_nfs4_lookup(dir, name, err); 4347 switch (err) { 4348 case -NFS4ERR_BADNAME: 4349 err = -ENOENT; 4350 goto out; 4351 case -NFS4ERR_MOVED: 4352 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4353 if (err == -NFS4ERR_MOVED) 4354 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4355 goto out; 4356 case -NFS4ERR_WRONGSEC: 4357 err = -EPERM; 4358 if (client != *clnt) 4359 goto out; 4360 client = nfs4_negotiate_security(client, dir, name); 4361 if (IS_ERR(client)) 4362 return PTR_ERR(client); 4363 4364 exception.retry = 1; 4365 break; 4366 default: 4367 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4368 } 4369 } while (exception.retry); 4370 4371out: 4372 if (err == 0) 4373 *clnt = client; 4374 else if (client != *clnt) 4375 rpc_shutdown_client(client); 4376 4377 return err; 4378} 4379 4380static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, 4381 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4382 struct nfs4_label *label) 4383{ 4384 int status; 4385 struct rpc_clnt *client = NFS_CLIENT(dir); 4386 4387 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, label); 4388 if (client != NFS_CLIENT(dir)) { 4389 rpc_shutdown_client(client); 4390 nfs_fixup_secinfo_attributes(fattr); 4391 } 4392 return status; 4393} 4394 4395struct rpc_clnt * 4396nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, 4397 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4398{ 4399 struct rpc_clnt *client = NFS_CLIENT(dir); 4400 int status; 4401 4402 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, NULL); 4403 if (status < 0) 4404 return ERR_PTR(status); 4405 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4406} 4407 4408static int _nfs4_proc_lookupp(struct inode *inode, 4409 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4410 struct nfs4_label *label) 4411{ 4412 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4413 struct nfs_server *server = NFS_SERVER(inode); 4414 int status; 4415 struct nfs4_lookupp_arg args = { 4416 .bitmask = server->attr_bitmask, 4417 .fh = NFS_FH(inode), 4418 }; 4419 struct nfs4_lookupp_res res = { 4420 .server = server, 4421 .fattr = fattr, 4422 .label = label, 4423 .fh = fhandle, 4424 }; 4425 struct rpc_message msg = { 4426 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4427 .rpc_argp = &args, 4428 .rpc_resp = &res, 4429 }; 4430 4431 args.bitmask = nfs4_bitmask(server, label); 4432 4433 nfs_fattr_init(fattr); 4434 4435 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4436 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4437 &res.seq_res, 0); 4438 dprintk("NFS reply lookupp: %d\n", status); 4439 return status; 4440} 4441 4442static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4443 struct nfs_fattr *fattr, struct nfs4_label *label) 4444{ 4445 struct nfs4_exception exception = { 4446 .interruptible = true, 4447 }; 4448 int err; 4449 do { 4450 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label); 4451 trace_nfs4_lookupp(inode, err); 4452 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4453 &exception); 4454 } while (exception.retry); 4455 return err; 4456} 4457 4458static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4459{ 4460 struct nfs_server *server = NFS_SERVER(inode); 4461 struct nfs4_accessargs args = { 4462 .fh = NFS_FH(inode), 4463 .access = entry->mask, 4464 }; 4465 struct nfs4_accessres res = { 4466 .server = server, 4467 }; 4468 struct rpc_message msg = { 4469 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4470 .rpc_argp = &args, 4471 .rpc_resp = &res, 4472 .rpc_cred = entry->cred, 4473 }; 4474 int status = 0; 4475 4476 if (!nfs4_have_delegation(inode, FMODE_READ)) { 4477 res.fattr = nfs_alloc_fattr(); 4478 if (res.fattr == NULL) 4479 return -ENOMEM; 4480 args.bitmask = server->cache_consistency_bitmask; 4481 } 4482 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4483 if (!status) { 4484 nfs_access_set_mask(entry, res.access); 4485 if (res.fattr) 4486 nfs_refresh_inode(inode, res.fattr); 4487 } 4488 nfs_free_fattr(res.fattr); 4489 return status; 4490} 4491 4492static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4493{ 4494 struct nfs4_exception exception = { 4495 .interruptible = true, 4496 }; 4497 int err; 4498 do { 4499 err = _nfs4_proc_access(inode, entry); 4500 trace_nfs4_access(inode, err); 4501 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4502 &exception); 4503 } while (exception.retry); 4504 return err; 4505} 4506 4507/* 4508 * TODO: For the time being, we don't try to get any attributes 4509 * along with any of the zero-copy operations READ, READDIR, 4510 * READLINK, WRITE. 4511 * 4512 * In the case of the first three, we want to put the GETATTR 4513 * after the read-type operation -- this is because it is hard 4514 * to predict the length of a GETATTR response in v4, and thus 4515 * align the READ data correctly. This means that the GETATTR 4516 * may end up partially falling into the page cache, and we should 4517 * shift it into the 'tail' of the xdr_buf before processing. 4518 * To do this efficiently, we need to know the total length 4519 * of data received, which doesn't seem to be available outside 4520 * of the RPC layer. 4521 * 4522 * In the case of WRITE, we also want to put the GETATTR after 4523 * the operation -- in this case because we want to make sure 4524 * we get the post-operation mtime and size. 4525 * 4526 * Both of these changes to the XDR layer would in fact be quite 4527 * minor, but I decided to leave them for a subsequent patch. 4528 */ 4529static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4530 unsigned int pgbase, unsigned int pglen) 4531{ 4532 struct nfs4_readlink args = { 4533 .fh = NFS_FH(inode), 4534 .pgbase = pgbase, 4535 .pglen = pglen, 4536 .pages = &page, 4537 }; 4538 struct nfs4_readlink_res res; 4539 struct rpc_message msg = { 4540 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4541 .rpc_argp = &args, 4542 .rpc_resp = &res, 4543 }; 4544 4545 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4546} 4547 4548static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4549 unsigned int pgbase, unsigned int pglen) 4550{ 4551 struct nfs4_exception exception = { 4552 .interruptible = true, 4553 }; 4554 int err; 4555 do { 4556 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4557 trace_nfs4_readlink(inode, err); 4558 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4559 &exception); 4560 } while (exception.retry); 4561 return err; 4562} 4563 4564/* 4565 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4566 */ 4567static int 4568nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4569 int flags) 4570{ 4571 struct nfs_server *server = NFS_SERVER(dir); 4572 struct nfs4_label l, *ilabel; 4573 struct nfs_open_context *ctx; 4574 struct nfs4_state *state; 4575 int status = 0; 4576 4577 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4578 if (IS_ERR(ctx)) 4579 return PTR_ERR(ctx); 4580 4581 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4582 4583 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4584 sattr->ia_mode &= ~current_umask(); 4585 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4586 if (IS_ERR(state)) { 4587 status = PTR_ERR(state); 4588 goto out; 4589 } 4590out: 4591 nfs4_label_release_security(ilabel); 4592 put_nfs_open_context(ctx); 4593 return status; 4594} 4595 4596static int 4597_nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4598{ 4599 struct nfs_server *server = NFS_SERVER(dir); 4600 struct nfs_removeargs args = { 4601 .fh = NFS_FH(dir), 4602 .name = *name, 4603 }; 4604 struct nfs_removeres res = { 4605 .server = server, 4606 }; 4607 struct rpc_message msg = { 4608 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4609 .rpc_argp = &args, 4610 .rpc_resp = &res, 4611 }; 4612 unsigned long timestamp = jiffies; 4613 int status; 4614 4615 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4616 if (status == 0) { 4617 spin_lock(&dir->i_lock); 4618 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp, 4619 NFS_INO_INVALID_DATA); 4620 /* Removing a directory decrements nlink in the parent */ 4621 if (ftype == NF4DIR && dir->i_nlink > 2) 4622 nfs4_dec_nlink_locked(dir); 4623 spin_unlock(&dir->i_lock); 4624 } 4625 return status; 4626} 4627 4628static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4629{ 4630 struct nfs4_exception exception = { 4631 .interruptible = true, 4632 }; 4633 struct inode *inode = d_inode(dentry); 4634 int err; 4635 4636 if (inode) { 4637 if (inode->i_nlink == 1) 4638 nfs4_inode_return_delegation(inode); 4639 else 4640 nfs4_inode_make_writeable(inode); 4641 } 4642 do { 4643 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4644 trace_nfs4_remove(dir, &dentry->d_name, err); 4645 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4646 &exception); 4647 } while (exception.retry); 4648 return err; 4649} 4650 4651static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4652{ 4653 struct nfs4_exception exception = { 4654 .interruptible = true, 4655 }; 4656 int err; 4657 4658 do { 4659 err = _nfs4_proc_remove(dir, name, NF4DIR); 4660 trace_nfs4_remove(dir, name, err); 4661 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4662 &exception); 4663 } while (exception.retry); 4664 return err; 4665} 4666 4667static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4668 struct dentry *dentry, 4669 struct inode *inode) 4670{ 4671 struct nfs_removeargs *args = msg->rpc_argp; 4672 struct nfs_removeres *res = msg->rpc_resp; 4673 4674 res->server = NFS_SB(dentry->d_sb); 4675 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4676 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4677 4678 nfs_fattr_init(res->dir_attr); 4679 4680 if (inode) 4681 nfs4_inode_return_delegation(inode); 4682} 4683 4684static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4685{ 4686 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4687 &data->args.seq_args, 4688 &data->res.seq_res, 4689 task); 4690} 4691 4692static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4693{ 4694 struct nfs_unlinkdata *data = task->tk_calldata; 4695 struct nfs_removeres *res = &data->res; 4696 4697 if (!nfs4_sequence_done(task, &res->seq_res)) 4698 return 0; 4699 if (nfs4_async_handle_error(task, res->server, NULL, 4700 &data->timeout) == -EAGAIN) 4701 return 0; 4702 if (task->tk_status == 0) 4703 nfs4_update_changeattr(dir, &res->cinfo, 4704 res->dir_attr->time_start, 4705 NFS_INO_INVALID_DATA); 4706 return 1; 4707} 4708 4709static void nfs4_proc_rename_setup(struct rpc_message *msg, 4710 struct dentry *old_dentry, 4711 struct dentry *new_dentry) 4712{ 4713 struct nfs_renameargs *arg = msg->rpc_argp; 4714 struct nfs_renameres *res = msg->rpc_resp; 4715 struct inode *old_inode = d_inode(old_dentry); 4716 struct inode *new_inode = d_inode(new_dentry); 4717 4718 if (old_inode) 4719 nfs4_inode_make_writeable(old_inode); 4720 if (new_inode) 4721 nfs4_inode_return_delegation(new_inode); 4722 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4723 res->server = NFS_SB(old_dentry->d_sb); 4724 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4725} 4726 4727static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4728{ 4729 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4730 &data->args.seq_args, 4731 &data->res.seq_res, 4732 task); 4733} 4734 4735static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4736 struct inode *new_dir) 4737{ 4738 struct nfs_renamedata *data = task->tk_calldata; 4739 struct nfs_renameres *res = &data->res; 4740 4741 if (!nfs4_sequence_done(task, &res->seq_res)) 4742 return 0; 4743 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4744 return 0; 4745 4746 if (task->tk_status == 0) { 4747 if (new_dir != old_dir) { 4748 /* Note: If we moved a directory, nlink will change */ 4749 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4750 res->old_fattr->time_start, 4751 NFS_INO_INVALID_OTHER | 4752 NFS_INO_INVALID_DATA); 4753 nfs4_update_changeattr(new_dir, &res->new_cinfo, 4754 res->new_fattr->time_start, 4755 NFS_INO_INVALID_OTHER | 4756 NFS_INO_INVALID_DATA); 4757 } else 4758 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4759 res->old_fattr->time_start, 4760 NFS_INO_INVALID_DATA); 4761 } 4762 return 1; 4763} 4764 4765static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4766{ 4767 struct nfs_server *server = NFS_SERVER(inode); 4768 __u32 bitmask[NFS4_BITMASK_SZ]; 4769 struct nfs4_link_arg arg = { 4770 .fh = NFS_FH(inode), 4771 .dir_fh = NFS_FH(dir), 4772 .name = name, 4773 .bitmask = bitmask, 4774 }; 4775 struct nfs4_link_res res = { 4776 .server = server, 4777 .label = NULL, 4778 }; 4779 struct rpc_message msg = { 4780 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4781 .rpc_argp = &arg, 4782 .rpc_resp = &res, 4783 }; 4784 int status = -ENOMEM; 4785 4786 res.fattr = nfs_alloc_fattr(); 4787 if (res.fattr == NULL) 4788 goto out; 4789 4790 res.label = nfs4_label_alloc(server, GFP_KERNEL); 4791 if (IS_ERR(res.label)) { 4792 status = PTR_ERR(res.label); 4793 goto out; 4794 } 4795 4796 nfs4_inode_make_writeable(inode); 4797 nfs4_bitmap_copy_adjust_setattr(bitmask, nfs4_bitmask(server, res.label), inode); 4798 4799 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4800 if (!status) { 4801 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start, 4802 NFS_INO_INVALID_DATA); 4803 status = nfs_post_op_update_inode(inode, res.fattr); 4804 if (!status) 4805 nfs_setsecurity(inode, res.fattr, res.label); 4806 } 4807 4808 4809 nfs4_label_free(res.label); 4810 4811out: 4812 nfs_free_fattr(res.fattr); 4813 return status; 4814} 4815 4816static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4817{ 4818 struct nfs4_exception exception = { 4819 .interruptible = true, 4820 }; 4821 int err; 4822 do { 4823 err = nfs4_handle_exception(NFS_SERVER(inode), 4824 _nfs4_proc_link(inode, dir, name), 4825 &exception); 4826 } while (exception.retry); 4827 return err; 4828} 4829 4830struct nfs4_createdata { 4831 struct rpc_message msg; 4832 struct nfs4_create_arg arg; 4833 struct nfs4_create_res res; 4834 struct nfs_fh fh; 4835 struct nfs_fattr fattr; 4836 struct nfs4_label *label; 4837}; 4838 4839static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4840 const struct qstr *name, struct iattr *sattr, u32 ftype) 4841{ 4842 struct nfs4_createdata *data; 4843 4844 data = kzalloc(sizeof(*data), GFP_KERNEL); 4845 if (data != NULL) { 4846 struct nfs_server *server = NFS_SERVER(dir); 4847 4848 data->label = nfs4_label_alloc(server, GFP_KERNEL); 4849 if (IS_ERR(data->label)) 4850 goto out_free; 4851 4852 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4853 data->msg.rpc_argp = &data->arg; 4854 data->msg.rpc_resp = &data->res; 4855 data->arg.dir_fh = NFS_FH(dir); 4856 data->arg.server = server; 4857 data->arg.name = name; 4858 data->arg.attrs = sattr; 4859 data->arg.ftype = ftype; 4860 data->arg.bitmask = nfs4_bitmask(server, data->label); 4861 data->arg.umask = current_umask(); 4862 data->res.server = server; 4863 data->res.fh = &data->fh; 4864 data->res.fattr = &data->fattr; 4865 data->res.label = data->label; 4866 nfs_fattr_init(data->res.fattr); 4867 } 4868 return data; 4869out_free: 4870 kfree(data); 4871 return NULL; 4872} 4873 4874static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 4875{ 4876 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 4877 &data->arg.seq_args, &data->res.seq_res, 1); 4878 if (status == 0) { 4879 spin_lock(&dir->i_lock); 4880 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo, 4881 data->res.fattr->time_start, 4882 NFS_INO_INVALID_DATA); 4883 /* Creating a directory bumps nlink in the parent */ 4884 if (data->arg.ftype == NF4DIR) 4885 nfs4_inc_nlink_locked(dir); 4886 spin_unlock(&dir->i_lock); 4887 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); 4888 } 4889 return status; 4890} 4891 4892static void nfs4_free_createdata(struct nfs4_createdata *data) 4893{ 4894 nfs4_label_free(data->label); 4895 kfree(data); 4896} 4897 4898static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4899 struct page *page, unsigned int len, struct iattr *sattr, 4900 struct nfs4_label *label) 4901{ 4902 struct nfs4_createdata *data; 4903 int status = -ENAMETOOLONG; 4904 4905 if (len > NFS4_MAXPATHLEN) 4906 goto out; 4907 4908 status = -ENOMEM; 4909 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 4910 if (data == NULL) 4911 goto out; 4912 4913 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 4914 data->arg.u.symlink.pages = &page; 4915 data->arg.u.symlink.len = len; 4916 data->arg.label = label; 4917 4918 status = nfs4_do_create(dir, dentry, data); 4919 4920 nfs4_free_createdata(data); 4921out: 4922 return status; 4923} 4924 4925static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4926 struct page *page, unsigned int len, struct iattr *sattr) 4927{ 4928 struct nfs4_exception exception = { 4929 .interruptible = true, 4930 }; 4931 struct nfs4_label l, *label; 4932 int err; 4933 4934 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4935 4936 do { 4937 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 4938 trace_nfs4_symlink(dir, &dentry->d_name, err); 4939 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4940 &exception); 4941 } while (exception.retry); 4942 4943 nfs4_label_release_security(label); 4944 return err; 4945} 4946 4947static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4948 struct iattr *sattr, struct nfs4_label *label) 4949{ 4950 struct nfs4_createdata *data; 4951 int status = -ENOMEM; 4952 4953 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 4954 if (data == NULL) 4955 goto out; 4956 4957 data->arg.label = label; 4958 status = nfs4_do_create(dir, dentry, data); 4959 4960 nfs4_free_createdata(data); 4961out: 4962 return status; 4963} 4964 4965static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4966 struct iattr *sattr) 4967{ 4968 struct nfs_server *server = NFS_SERVER(dir); 4969 struct nfs4_exception exception = { 4970 .interruptible = true, 4971 }; 4972 struct nfs4_label l, *label; 4973 int err; 4974 4975 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4976 4977 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4978 sattr->ia_mode &= ~current_umask(); 4979 do { 4980 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 4981 trace_nfs4_mkdir(dir, &dentry->d_name, err); 4982 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4983 &exception); 4984 } while (exception.retry); 4985 nfs4_label_release_security(label); 4986 4987 return err; 4988} 4989 4990static int _nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred, 4991 u64 cookie, struct page **pages, unsigned int count, bool plus) 4992{ 4993 struct inode *dir = d_inode(dentry); 4994 struct nfs_server *server = NFS_SERVER(dir); 4995 struct nfs4_readdir_arg args = { 4996 .fh = NFS_FH(dir), 4997 .pages = pages, 4998 .pgbase = 0, 4999 .count = count, 5000 .plus = plus, 5001 }; 5002 struct nfs4_readdir_res res; 5003 struct rpc_message msg = { 5004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 5005 .rpc_argp = &args, 5006 .rpc_resp = &res, 5007 .rpc_cred = cred, 5008 }; 5009 int status; 5010 5011 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__, 5012 dentry, 5013 (unsigned long long)cookie); 5014 if (!(server->caps & NFS_CAP_SECURITY_LABEL)) 5015 args.bitmask = server->attr_bitmask_nl; 5016 else 5017 args.bitmask = server->attr_bitmask; 5018 5019 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); 5020 res.pgbase = args.pgbase; 5021 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 5022 &res.seq_res, 0); 5023 if (status >= 0) { 5024 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); 5025 status += args.pgbase; 5026 } 5027 5028 nfs_invalidate_atime(dir); 5029 5030 dprintk("%s: returns %d\n", __func__, status); 5031 return status; 5032} 5033 5034static int nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred, 5035 u64 cookie, struct page **pages, unsigned int count, bool plus) 5036{ 5037 struct nfs4_exception exception = { 5038 .interruptible = true, 5039 }; 5040 int err; 5041 do { 5042 err = _nfs4_proc_readdir(dentry, cred, cookie, 5043 pages, count, plus); 5044 trace_nfs4_readdir(d_inode(dentry), err); 5045 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err, 5046 &exception); 5047 } while (exception.retry); 5048 return err; 5049} 5050 5051static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5052 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 5053{ 5054 struct nfs4_createdata *data; 5055 int mode = sattr->ia_mode; 5056 int status = -ENOMEM; 5057 5058 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 5059 if (data == NULL) 5060 goto out; 5061 5062 if (S_ISFIFO(mode)) 5063 data->arg.ftype = NF4FIFO; 5064 else if (S_ISBLK(mode)) { 5065 data->arg.ftype = NF4BLK; 5066 data->arg.u.device.specdata1 = MAJOR(rdev); 5067 data->arg.u.device.specdata2 = MINOR(rdev); 5068 } 5069 else if (S_ISCHR(mode)) { 5070 data->arg.ftype = NF4CHR; 5071 data->arg.u.device.specdata1 = MAJOR(rdev); 5072 data->arg.u.device.specdata2 = MINOR(rdev); 5073 } else if (!S_ISSOCK(mode)) { 5074 status = -EINVAL; 5075 goto out_free; 5076 } 5077 5078 data->arg.label = label; 5079 status = nfs4_do_create(dir, dentry, data); 5080out_free: 5081 nfs4_free_createdata(data); 5082out: 5083 return status; 5084} 5085 5086static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5087 struct iattr *sattr, dev_t rdev) 5088{ 5089 struct nfs_server *server = NFS_SERVER(dir); 5090 struct nfs4_exception exception = { 5091 .interruptible = true, 5092 }; 5093 struct nfs4_label l, *label; 5094 int err; 5095 5096 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5097 5098 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5099 sattr->ia_mode &= ~current_umask(); 5100 do { 5101 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 5102 trace_nfs4_mknod(dir, &dentry->d_name, err); 5103 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5104 &exception); 5105 } while (exception.retry); 5106 5107 nfs4_label_release_security(label); 5108 5109 return err; 5110} 5111 5112static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5113 struct nfs_fsstat *fsstat) 5114{ 5115 struct nfs4_statfs_arg args = { 5116 .fh = fhandle, 5117 .bitmask = server->attr_bitmask, 5118 }; 5119 struct nfs4_statfs_res res = { 5120 .fsstat = fsstat, 5121 }; 5122 struct rpc_message msg = { 5123 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 5124 .rpc_argp = &args, 5125 .rpc_resp = &res, 5126 }; 5127 5128 nfs_fattr_init(fsstat->fattr); 5129 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5130} 5131 5132static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 5133{ 5134 struct nfs4_exception exception = { 5135 .interruptible = true, 5136 }; 5137 int err; 5138 do { 5139 err = nfs4_handle_exception(server, 5140 _nfs4_proc_statfs(server, fhandle, fsstat), 5141 &exception); 5142 } while (exception.retry); 5143 return err; 5144} 5145 5146static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5147 struct nfs_fsinfo *fsinfo) 5148{ 5149 struct nfs4_fsinfo_arg args = { 5150 .fh = fhandle, 5151 .bitmask = server->attr_bitmask, 5152 }; 5153 struct nfs4_fsinfo_res res = { 5154 .fsinfo = fsinfo, 5155 }; 5156 struct rpc_message msg = { 5157 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5158 .rpc_argp = &args, 5159 .rpc_resp = &res, 5160 }; 5161 5162 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5163} 5164 5165static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5166{ 5167 struct nfs4_exception exception = { 5168 .interruptible = true, 5169 }; 5170 int err; 5171 5172 do { 5173 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5174 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5175 if (err == 0) { 5176 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); 5177 break; 5178 } 5179 err = nfs4_handle_exception(server, err, &exception); 5180 } while (exception.retry); 5181 return err; 5182} 5183 5184static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5185{ 5186 int error; 5187 5188 nfs_fattr_init(fsinfo->fattr); 5189 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5190 if (error == 0) { 5191 /* block layout checks this! */ 5192 server->pnfs_blksize = fsinfo->blksize; 5193 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5194 } 5195 5196 return error; 5197} 5198 5199static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5200 struct nfs_pathconf *pathconf) 5201{ 5202 struct nfs4_pathconf_arg args = { 5203 .fh = fhandle, 5204 .bitmask = server->attr_bitmask, 5205 }; 5206 struct nfs4_pathconf_res res = { 5207 .pathconf = pathconf, 5208 }; 5209 struct rpc_message msg = { 5210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5211 .rpc_argp = &args, 5212 .rpc_resp = &res, 5213 }; 5214 5215 /* None of the pathconf attributes are mandatory to implement */ 5216 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5217 memset(pathconf, 0, sizeof(*pathconf)); 5218 return 0; 5219 } 5220 5221 nfs_fattr_init(pathconf->fattr); 5222 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5223} 5224 5225static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5226 struct nfs_pathconf *pathconf) 5227{ 5228 struct nfs4_exception exception = { 5229 .interruptible = true, 5230 }; 5231 int err; 5232 5233 do { 5234 err = nfs4_handle_exception(server, 5235 _nfs4_proc_pathconf(server, fhandle, pathconf), 5236 &exception); 5237 } while (exception.retry); 5238 return err; 5239} 5240 5241int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5242 const struct nfs_open_context *ctx, 5243 const struct nfs_lock_context *l_ctx, 5244 fmode_t fmode) 5245{ 5246 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5247} 5248EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5249 5250static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5251 const struct nfs_open_context *ctx, 5252 const struct nfs_lock_context *l_ctx, 5253 fmode_t fmode) 5254{ 5255 nfs4_stateid _current_stateid; 5256 5257 /* If the current stateid represents a lost lock, then exit */ 5258 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) 5259 return true; 5260 return nfs4_stateid_match(stateid, &_current_stateid); 5261} 5262 5263static bool nfs4_error_stateid_expired(int err) 5264{ 5265 switch (err) { 5266 case -NFS4ERR_DELEG_REVOKED: 5267 case -NFS4ERR_ADMIN_REVOKED: 5268 case -NFS4ERR_BAD_STATEID: 5269 case -NFS4ERR_STALE_STATEID: 5270 case -NFS4ERR_OLD_STATEID: 5271 case -NFS4ERR_OPENMODE: 5272 case -NFS4ERR_EXPIRED: 5273 return true; 5274 } 5275 return false; 5276} 5277 5278static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5279{ 5280 struct nfs_server *server = NFS_SERVER(hdr->inode); 5281 5282 trace_nfs4_read(hdr, task->tk_status); 5283 if (task->tk_status < 0) { 5284 struct nfs4_exception exception = { 5285 .inode = hdr->inode, 5286 .state = hdr->args.context->state, 5287 .stateid = &hdr->args.stateid, 5288 }; 5289 task->tk_status = nfs4_async_handle_exception(task, 5290 server, task->tk_status, &exception); 5291 if (exception.retry) { 5292 rpc_restart_call_prepare(task); 5293 return -EAGAIN; 5294 } 5295 } 5296 5297 if (task->tk_status > 0) 5298 renew_lease(server, hdr->timestamp); 5299 return 0; 5300} 5301 5302static bool nfs4_read_stateid_changed(struct rpc_task *task, 5303 struct nfs_pgio_args *args) 5304{ 5305 5306 if (!nfs4_error_stateid_expired(task->tk_status) || 5307 nfs4_stateid_is_current(&args->stateid, 5308 args->context, 5309 args->lock_context, 5310 FMODE_READ)) 5311 return false; 5312 rpc_restart_call_prepare(task); 5313 return true; 5314} 5315 5316static bool nfs4_read_plus_not_supported(struct rpc_task *task, 5317 struct nfs_pgio_header *hdr) 5318{ 5319 struct nfs_server *server = NFS_SERVER(hdr->inode); 5320 struct rpc_message *msg = &task->tk_msg; 5321 5322 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && 5323 server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) { 5324 server->caps &= ~NFS_CAP_READ_PLUS; 5325 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5326 rpc_restart_call_prepare(task); 5327 return true; 5328 } 5329 return false; 5330} 5331 5332static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5333{ 5334 dprintk("--> %s\n", __func__); 5335 5336 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5337 return -EAGAIN; 5338 if (nfs4_read_stateid_changed(task, &hdr->args)) 5339 return -EAGAIN; 5340 if (nfs4_read_plus_not_supported(task, hdr)) 5341 return -EAGAIN; 5342 if (task->tk_status > 0) 5343 nfs_invalidate_atime(hdr->inode); 5344 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5345 nfs4_read_done_cb(task, hdr); 5346} 5347 5348#if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS 5349static void nfs42_read_plus_support(struct nfs_server *server, struct rpc_message *msg) 5350{ 5351 if (server->caps & NFS_CAP_READ_PLUS) 5352 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; 5353 else 5354 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5355} 5356#else 5357static void nfs42_read_plus_support(struct nfs_server *server, struct rpc_message *msg) 5358{ 5359 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5360} 5361#endif /* CONFIG_NFS_V4_2 */ 5362 5363static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5364 struct rpc_message *msg) 5365{ 5366 hdr->timestamp = jiffies; 5367 if (!hdr->pgio_done_cb) 5368 hdr->pgio_done_cb = nfs4_read_done_cb; 5369 nfs42_read_plus_support(NFS_SERVER(hdr->inode), msg); 5370 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5371} 5372 5373static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5374 struct nfs_pgio_header *hdr) 5375{ 5376 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5377 &hdr->args.seq_args, 5378 &hdr->res.seq_res, 5379 task)) 5380 return 0; 5381 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5382 hdr->args.lock_context, 5383 hdr->rw_mode) == -EIO) 5384 return -EIO; 5385 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5386 return -EIO; 5387 return 0; 5388} 5389 5390static int nfs4_write_done_cb(struct rpc_task *task, 5391 struct nfs_pgio_header *hdr) 5392{ 5393 struct inode *inode = hdr->inode; 5394 5395 trace_nfs4_write(hdr, task->tk_status); 5396 if (task->tk_status < 0) { 5397 struct nfs4_exception exception = { 5398 .inode = hdr->inode, 5399 .state = hdr->args.context->state, 5400 .stateid = &hdr->args.stateid, 5401 }; 5402 task->tk_status = nfs4_async_handle_exception(task, 5403 NFS_SERVER(inode), task->tk_status, 5404 &exception); 5405 if (exception.retry) { 5406 rpc_restart_call_prepare(task); 5407 return -EAGAIN; 5408 } 5409 } 5410 if (task->tk_status >= 0) { 5411 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5412 nfs_writeback_update_inode(hdr); 5413 } 5414 return 0; 5415} 5416 5417static bool nfs4_write_stateid_changed(struct rpc_task *task, 5418 struct nfs_pgio_args *args) 5419{ 5420 5421 if (!nfs4_error_stateid_expired(task->tk_status) || 5422 nfs4_stateid_is_current(&args->stateid, 5423 args->context, 5424 args->lock_context, 5425 FMODE_WRITE)) 5426 return false; 5427 rpc_restart_call_prepare(task); 5428 return true; 5429} 5430 5431static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5432{ 5433 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5434 return -EAGAIN; 5435 if (nfs4_write_stateid_changed(task, &hdr->args)) 5436 return -EAGAIN; 5437 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5438 nfs4_write_done_cb(task, hdr); 5439} 5440 5441static 5442bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5443{ 5444 /* Don't request attributes for pNFS or O_DIRECT writes */ 5445 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5446 return false; 5447 /* Otherwise, request attributes if and only if we don't hold 5448 * a delegation 5449 */ 5450 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 5451} 5452 5453static void nfs4_bitmask_set(__u32 bitmask[NFS4_BITMASK_SZ], const __u32 *src, 5454 struct inode *inode, struct nfs_server *server, 5455 struct nfs4_label *label) 5456{ 5457 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); 5458 unsigned int i; 5459 5460 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ); 5461 5462 if (cache_validity & (NFS_INO_INVALID_CHANGE | NFS_INO_REVAL_PAGECACHE)) 5463 bitmask[0] |= FATTR4_WORD0_CHANGE; 5464 if (cache_validity & NFS_INO_INVALID_ATIME) 5465 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS; 5466 if (cache_validity & NFS_INO_INVALID_OTHER) 5467 bitmask[1] |= FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | 5468 FATTR4_WORD1_OWNER_GROUP | 5469 FATTR4_WORD1_NUMLINKS; 5470 if (label && label->len && cache_validity & NFS_INO_INVALID_LABEL) 5471 bitmask[2] |= FATTR4_WORD2_SECURITY_LABEL; 5472 if (cache_validity & NFS_INO_INVALID_CTIME) 5473 bitmask[1] |= FATTR4_WORD1_TIME_METADATA; 5474 if (cache_validity & NFS_INO_INVALID_MTIME) 5475 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY; 5476 if (cache_validity & NFS_INO_INVALID_BLOCKS) 5477 bitmask[1] |= FATTR4_WORD1_SPACE_USED; 5478 5479 if (nfs4_have_delegation(inode, FMODE_READ) && 5480 !(cache_validity & NFS_INO_REVAL_FORCED)) 5481 bitmask[0] &= ~FATTR4_WORD0_SIZE; 5482 else if (cache_validity & 5483 (NFS_INO_INVALID_SIZE | NFS_INO_REVAL_PAGECACHE)) 5484 bitmask[0] |= FATTR4_WORD0_SIZE; 5485 5486 for (i = 0; i < NFS4_BITMASK_SZ; i++) 5487 bitmask[i] &= server->attr_bitmask[i]; 5488} 5489 5490static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5491 struct rpc_message *msg, 5492 struct rpc_clnt **clnt) 5493{ 5494 struct nfs_server *server = NFS_SERVER(hdr->inode); 5495 5496 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5497 hdr->args.bitmask = NULL; 5498 hdr->res.fattr = NULL; 5499 } else { 5500 nfs4_bitmask_set(hdr->args.bitmask_store, 5501 server->cache_consistency_bitmask, 5502 hdr->inode, server, NULL); 5503 hdr->args.bitmask = hdr->args.bitmask_store; 5504 } 5505 5506 if (!hdr->pgio_done_cb) 5507 hdr->pgio_done_cb = nfs4_write_done_cb; 5508 hdr->res.server = server; 5509 hdr->timestamp = jiffies; 5510 5511 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5512 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5513 nfs4_state_protect_write(hdr->ds_clp ? hdr->ds_clp : server->nfs_client, clnt, msg, hdr); 5514} 5515 5516static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5517{ 5518 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5519 &data->args.seq_args, 5520 &data->res.seq_res, 5521 task); 5522} 5523 5524static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5525{ 5526 struct inode *inode = data->inode; 5527 5528 trace_nfs4_commit(data, task->tk_status); 5529 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5530 NULL, NULL) == -EAGAIN) { 5531 rpc_restart_call_prepare(task); 5532 return -EAGAIN; 5533 } 5534 return 0; 5535} 5536 5537static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5538{ 5539 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5540 return -EAGAIN; 5541 return data->commit_done_cb(task, data); 5542} 5543 5544static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5545 struct rpc_clnt **clnt) 5546{ 5547 struct nfs_server *server = NFS_SERVER(data->inode); 5548 5549 if (data->commit_done_cb == NULL) 5550 data->commit_done_cb = nfs4_commit_done_cb; 5551 data->res.server = server; 5552 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5553 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5554 nfs4_state_protect(data->ds_clp ? data->ds_clp : server->nfs_client, 5555 NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5556} 5557 5558static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5559 struct nfs_commitres *res) 5560{ 5561 struct inode *dst_inode = file_inode(dst); 5562 struct nfs_server *server = NFS_SERVER(dst_inode); 5563 struct rpc_message msg = { 5564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5565 .rpc_argp = args, 5566 .rpc_resp = res, 5567 }; 5568 5569 args->fh = NFS_FH(dst_inode); 5570 return nfs4_call_sync(server->client, server, &msg, 5571 &args->seq_args, &res->seq_res, 1); 5572} 5573 5574int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5575{ 5576 struct nfs_commitargs args = { 5577 .offset = offset, 5578 .count = count, 5579 }; 5580 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5581 struct nfs4_exception exception = { }; 5582 int status; 5583 5584 do { 5585 status = _nfs4_proc_commit(dst, &args, res); 5586 status = nfs4_handle_exception(dst_server, status, &exception); 5587 } while (exception.retry); 5588 5589 return status; 5590} 5591 5592struct nfs4_renewdata { 5593 struct nfs_client *client; 5594 unsigned long timestamp; 5595}; 5596 5597/* 5598 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5599 * standalone procedure for queueing an asynchronous RENEW. 5600 */ 5601static void nfs4_renew_release(void *calldata) 5602{ 5603 struct nfs4_renewdata *data = calldata; 5604 struct nfs_client *clp = data->client; 5605 5606 if (refcount_read(&clp->cl_count) > 1) 5607 nfs4_schedule_state_renewal(clp); 5608 nfs_put_client(clp); 5609 kfree(data); 5610} 5611 5612static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5613{ 5614 struct nfs4_renewdata *data = calldata; 5615 struct nfs_client *clp = data->client; 5616 unsigned long timestamp = data->timestamp; 5617 5618 trace_nfs4_renew_async(clp, task->tk_status); 5619 switch (task->tk_status) { 5620 case 0: 5621 break; 5622 case -NFS4ERR_LEASE_MOVED: 5623 nfs4_schedule_lease_moved_recovery(clp); 5624 break; 5625 default: 5626 /* Unless we're shutting down, schedule state recovery! */ 5627 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5628 return; 5629 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5630 nfs4_schedule_lease_recovery(clp); 5631 return; 5632 } 5633 nfs4_schedule_path_down_recovery(clp); 5634 } 5635 do_renew_lease(clp, timestamp); 5636} 5637 5638static const struct rpc_call_ops nfs4_renew_ops = { 5639 .rpc_call_done = nfs4_renew_done, 5640 .rpc_release = nfs4_renew_release, 5641}; 5642 5643static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5644{ 5645 struct rpc_message msg = { 5646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5647 .rpc_argp = clp, 5648 .rpc_cred = cred, 5649 }; 5650 struct nfs4_renewdata *data; 5651 5652 if (renew_flags == 0) 5653 return 0; 5654 if (!refcount_inc_not_zero(&clp->cl_count)) 5655 return -EIO; 5656 data = kmalloc(sizeof(*data), GFP_NOFS); 5657 if (data == NULL) { 5658 nfs_put_client(clp); 5659 return -ENOMEM; 5660 } 5661 data->client = clp; 5662 data->timestamp = jiffies; 5663 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5664 &nfs4_renew_ops, data); 5665} 5666 5667static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5668{ 5669 struct rpc_message msg = { 5670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5671 .rpc_argp = clp, 5672 .rpc_cred = cred, 5673 }; 5674 unsigned long now = jiffies; 5675 int status; 5676 5677 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5678 if (status < 0) 5679 return status; 5680 do_renew_lease(clp, now); 5681 return 0; 5682} 5683 5684static inline int nfs4_server_supports_acls(struct nfs_server *server) 5685{ 5686 return server->caps & NFS_CAP_ACLS; 5687} 5688 5689/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5690 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5691 * the stack. 5692 */ 5693#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5694 5695int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, 5696 struct page **pages) 5697{ 5698 struct page *newpage, **spages; 5699 int rc = 0; 5700 size_t len; 5701 spages = pages; 5702 5703 do { 5704 len = min_t(size_t, PAGE_SIZE, buflen); 5705 newpage = alloc_page(GFP_KERNEL); 5706 5707 if (newpage == NULL) 5708 goto unwind; 5709 memcpy(page_address(newpage), buf, len); 5710 buf += len; 5711 buflen -= len; 5712 *pages++ = newpage; 5713 rc++; 5714 } while (buflen != 0); 5715 5716 return rc; 5717 5718unwind: 5719 for(; rc > 0; rc--) 5720 __free_page(spages[rc-1]); 5721 return -ENOMEM; 5722} 5723 5724struct nfs4_cached_acl { 5725 int cached; 5726 size_t len; 5727 char data[]; 5728}; 5729 5730static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5731{ 5732 struct nfs_inode *nfsi = NFS_I(inode); 5733 5734 spin_lock(&inode->i_lock); 5735 kfree(nfsi->nfs4_acl); 5736 nfsi->nfs4_acl = acl; 5737 spin_unlock(&inode->i_lock); 5738} 5739 5740static void nfs4_zap_acl_attr(struct inode *inode) 5741{ 5742 nfs4_set_cached_acl(inode, NULL); 5743} 5744 5745static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 5746{ 5747 struct nfs_inode *nfsi = NFS_I(inode); 5748 struct nfs4_cached_acl *acl; 5749 int ret = -ENOENT; 5750 5751 spin_lock(&inode->i_lock); 5752 acl = nfsi->nfs4_acl; 5753 if (acl == NULL) 5754 goto out; 5755 if (buf == NULL) /* user is just asking for length */ 5756 goto out_len; 5757 if (acl->cached == 0) 5758 goto out; 5759 ret = -ERANGE; /* see getxattr(2) man page */ 5760 if (acl->len > buflen) 5761 goto out; 5762 memcpy(buf, acl->data, acl->len); 5763out_len: 5764 ret = acl->len; 5765out: 5766 spin_unlock(&inode->i_lock); 5767 return ret; 5768} 5769 5770static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 5771{ 5772 struct nfs4_cached_acl *acl; 5773 size_t buflen = sizeof(*acl) + acl_len; 5774 5775 if (buflen <= PAGE_SIZE) { 5776 acl = kmalloc(buflen, GFP_KERNEL); 5777 if (acl == NULL) 5778 goto out; 5779 acl->cached = 1; 5780 _copy_from_pages(acl->data, pages, pgbase, acl_len); 5781 } else { 5782 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 5783 if (acl == NULL) 5784 goto out; 5785 acl->cached = 0; 5786 } 5787 acl->len = acl_len; 5788out: 5789 nfs4_set_cached_acl(inode, acl); 5790} 5791 5792/* 5793 * The getxattr API returns the required buffer length when called with a 5794 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 5795 * the required buf. On a NULL buf, we send a page of data to the server 5796 * guessing that the ACL request can be serviced by a page. If so, we cache 5797 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 5798 * the cache. If not so, we throw away the page, and cache the required 5799 * length. The next getxattr call will then produce another round trip to 5800 * the server, this time with the input buf of the required size. 5801 */ 5802static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5803{ 5804 struct page **pages; 5805 struct nfs_getaclargs args = { 5806 .fh = NFS_FH(inode), 5807 .acl_len = buflen, 5808 }; 5809 struct nfs_getaclres res = { 5810 .acl_len = buflen, 5811 }; 5812 struct rpc_message msg = { 5813 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5814 .rpc_argp = &args, 5815 .rpc_resp = &res, 5816 }; 5817 unsigned int npages; 5818 int ret = -ENOMEM, i; 5819 struct nfs_server *server = NFS_SERVER(inode); 5820 5821 if (buflen == 0) 5822 buflen = server->rsize; 5823 5824 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 5825 pages = kmalloc_array(npages, sizeof(struct page *), GFP_NOFS); 5826 if (!pages) 5827 return -ENOMEM; 5828 5829 args.acl_pages = pages; 5830 5831 for (i = 0; i < npages; i++) { 5832 pages[i] = alloc_page(GFP_KERNEL); 5833 if (!pages[i]) 5834 goto out_free; 5835 } 5836 5837 /* for decoding across pages */ 5838 res.acl_scratch = alloc_page(GFP_KERNEL); 5839 if (!res.acl_scratch) 5840 goto out_free; 5841 5842 args.acl_len = npages * PAGE_SIZE; 5843 5844 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 5845 __func__, buf, buflen, npages, args.acl_len); 5846 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 5847 &msg, &args.seq_args, &res.seq_res, 0); 5848 if (ret) 5849 goto out_free; 5850 5851 /* Handle the case where the passed-in buffer is too short */ 5852 if (res.acl_flags & NFS4_ACL_TRUNC) { 5853 /* Did the user only issue a request for the acl length? */ 5854 if (buf == NULL) 5855 goto out_ok; 5856 ret = -ERANGE; 5857 goto out_free; 5858 } 5859 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 5860 if (buf) { 5861 if (res.acl_len > buflen) { 5862 ret = -ERANGE; 5863 goto out_free; 5864 } 5865 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 5866 } 5867out_ok: 5868 ret = res.acl_len; 5869out_free: 5870 while (--i >= 0) 5871 __free_page(pages[i]); 5872 if (res.acl_scratch) 5873 __free_page(res.acl_scratch); 5874 kfree(pages); 5875 return ret; 5876} 5877 5878static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5879{ 5880 struct nfs4_exception exception = { 5881 .interruptible = true, 5882 }; 5883 ssize_t ret; 5884 do { 5885 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 5886 trace_nfs4_get_acl(inode, ret); 5887 if (ret >= 0) 5888 break; 5889 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 5890 } while (exception.retry); 5891 return ret; 5892} 5893 5894static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 5895{ 5896 struct nfs_server *server = NFS_SERVER(inode); 5897 int ret; 5898 5899 if (!nfs4_server_supports_acls(server)) 5900 return -EOPNOTSUPP; 5901 ret = nfs_revalidate_inode(server, inode); 5902 if (ret < 0) 5903 return ret; 5904 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 5905 nfs_zap_acl_cache(inode); 5906 ret = nfs4_read_cached_acl(inode, buf, buflen); 5907 if (ret != -ENOENT) 5908 /* -ENOENT is returned if there is no ACL or if there is an ACL 5909 * but no cached acl data, just the acl length */ 5910 return ret; 5911 return nfs4_get_acl_uncached(inode, buf, buflen); 5912} 5913 5914static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5915{ 5916 struct nfs_server *server = NFS_SERVER(inode); 5917 struct page *pages[NFS4ACL_MAXPAGES]; 5918 struct nfs_setaclargs arg = { 5919 .fh = NFS_FH(inode), 5920 .acl_pages = pages, 5921 .acl_len = buflen, 5922 }; 5923 struct nfs_setaclres res; 5924 struct rpc_message msg = { 5925 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 5926 .rpc_argp = &arg, 5927 .rpc_resp = &res, 5928 }; 5929 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 5930 int ret, i; 5931 5932 /* You can't remove system.nfs4_acl: */ 5933 if (buflen == 0) 5934 return -EINVAL; 5935 if (!nfs4_server_supports_acls(server)) 5936 return -EOPNOTSUPP; 5937 if (npages > ARRAY_SIZE(pages)) 5938 return -ERANGE; 5939 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages); 5940 if (i < 0) 5941 return i; 5942 nfs4_inode_make_writeable(inode); 5943 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5944 5945 /* 5946 * Free each page after tx, so the only ref left is 5947 * held by the network stack 5948 */ 5949 for (; i > 0; i--) 5950 put_page(pages[i-1]); 5951 5952 /* 5953 * Acl update can result in inode attribute update. 5954 * so mark the attribute cache invalid. 5955 */ 5956 spin_lock(&inode->i_lock); 5957 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_CHANGE 5958 | NFS_INO_INVALID_CTIME 5959 | NFS_INO_REVAL_FORCED; 5960 spin_unlock(&inode->i_lock); 5961 nfs_access_zap_cache(inode); 5962 nfs_zap_acl_cache(inode); 5963 return ret; 5964} 5965 5966static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5967{ 5968 struct nfs4_exception exception = { }; 5969 int err; 5970 do { 5971 err = __nfs4_proc_set_acl(inode, buf, buflen); 5972 trace_nfs4_set_acl(inode, err); 5973 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) { 5974 /* 5975 * no need to retry since the kernel 5976 * isn't involved in encoding the ACEs. 5977 */ 5978 err = -EINVAL; 5979 break; 5980 } 5981 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5982 &exception); 5983 } while (exception.retry); 5984 return err; 5985} 5986 5987#ifdef CONFIG_NFS_V4_SECURITY_LABEL 5988static int _nfs4_get_security_label(struct inode *inode, void *buf, 5989 size_t buflen) 5990{ 5991 struct nfs_server *server = NFS_SERVER(inode); 5992 struct nfs_fattr fattr; 5993 struct nfs4_label label = {0, 0, buflen, buf}; 5994 5995 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5996 struct nfs4_getattr_arg arg = { 5997 .fh = NFS_FH(inode), 5998 .bitmask = bitmask, 5999 }; 6000 struct nfs4_getattr_res res = { 6001 .fattr = &fattr, 6002 .label = &label, 6003 .server = server, 6004 }; 6005 struct rpc_message msg = { 6006 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 6007 .rpc_argp = &arg, 6008 .rpc_resp = &res, 6009 }; 6010 int ret; 6011 6012 nfs_fattr_init(&fattr); 6013 6014 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 6015 if (ret) 6016 return ret; 6017 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 6018 return -ENOENT; 6019 return label.len; 6020} 6021 6022static int nfs4_get_security_label(struct inode *inode, void *buf, 6023 size_t buflen) 6024{ 6025 struct nfs4_exception exception = { 6026 .interruptible = true, 6027 }; 6028 int err; 6029 6030 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6031 return -EOPNOTSUPP; 6032 6033 do { 6034 err = _nfs4_get_security_label(inode, buf, buflen); 6035 trace_nfs4_get_security_label(inode, err); 6036 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6037 &exception); 6038 } while (exception.retry); 6039 return err; 6040} 6041 6042static int _nfs4_do_set_security_label(struct inode *inode, 6043 struct nfs4_label *ilabel, 6044 struct nfs_fattr *fattr, 6045 struct nfs4_label *olabel) 6046{ 6047 6048 struct iattr sattr = {0}; 6049 struct nfs_server *server = NFS_SERVER(inode); 6050 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6051 struct nfs_setattrargs arg = { 6052 .fh = NFS_FH(inode), 6053 .iap = &sattr, 6054 .server = server, 6055 .bitmask = bitmask, 6056 .label = ilabel, 6057 }; 6058 struct nfs_setattrres res = { 6059 .fattr = fattr, 6060 .label = olabel, 6061 .server = server, 6062 }; 6063 struct rpc_message msg = { 6064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 6065 .rpc_argp = &arg, 6066 .rpc_resp = &res, 6067 }; 6068 int status; 6069 6070 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 6071 6072 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6073 if (status) 6074 dprintk("%s failed: %d\n", __func__, status); 6075 6076 return status; 6077} 6078 6079static int nfs4_do_set_security_label(struct inode *inode, 6080 struct nfs4_label *ilabel, 6081 struct nfs_fattr *fattr, 6082 struct nfs4_label *olabel) 6083{ 6084 struct nfs4_exception exception = { }; 6085 int err; 6086 6087 do { 6088 err = _nfs4_do_set_security_label(inode, ilabel, 6089 fattr, olabel); 6090 trace_nfs4_set_security_label(inode, err); 6091 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6092 &exception); 6093 } while (exception.retry); 6094 return err; 6095} 6096 6097static int 6098nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 6099{ 6100 struct nfs4_label ilabel, *olabel = NULL; 6101 struct nfs_fattr fattr; 6102 int status; 6103 6104 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6105 return -EOPNOTSUPP; 6106 6107 nfs_fattr_init(&fattr); 6108 6109 ilabel.pi = 0; 6110 ilabel.lfs = 0; 6111 ilabel.label = (char *)buf; 6112 ilabel.len = buflen; 6113 6114 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 6115 if (IS_ERR(olabel)) { 6116 status = -PTR_ERR(olabel); 6117 goto out; 6118 } 6119 6120 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); 6121 if (status == 0) 6122 nfs_setsecurity(inode, &fattr, olabel); 6123 6124 nfs4_label_free(olabel); 6125out: 6126 return status; 6127} 6128#endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 6129 6130 6131static void nfs4_init_boot_verifier(const struct nfs_client *clp, 6132 nfs4_verifier *bootverf) 6133{ 6134 __be32 verf[2]; 6135 6136 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 6137 /* An impossible timestamp guarantees this value 6138 * will never match a generated boot time. */ 6139 verf[0] = cpu_to_be32(U32_MAX); 6140 verf[1] = cpu_to_be32(U32_MAX); 6141 } else { 6142 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6143 u64 ns = ktime_to_ns(nn->boot_time); 6144 6145 verf[0] = cpu_to_be32(ns >> 32); 6146 verf[1] = cpu_to_be32(ns); 6147 } 6148 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 6149} 6150 6151static size_t 6152nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen) 6153{ 6154 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6155 struct nfs_netns_client *nn_clp = nn->nfs_client; 6156 const char *id; 6157 6158 buf[0] = '\0'; 6159 6160 if (nn_clp) { 6161 rcu_read_lock(); 6162 id = rcu_dereference(nn_clp->identifier); 6163 if (id) 6164 strscpy(buf, id, buflen); 6165 rcu_read_unlock(); 6166 } 6167 6168 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0') 6169 strscpy(buf, nfs4_client_id_uniquifier, buflen); 6170 6171 return strlen(buf); 6172} 6173 6174static int 6175nfs4_init_nonuniform_client_string(struct nfs_client *clp) 6176{ 6177 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6178 size_t buflen; 6179 size_t len; 6180 char *str; 6181 6182 if (clp->cl_owner_id != NULL) 6183 return 0; 6184 6185 rcu_read_lock(); 6186 len = 14 + 6187 strlen(clp->cl_rpcclient->cl_nodename) + 6188 1 + 6189 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 6190 1; 6191 rcu_read_unlock(); 6192 6193 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6194 if (buflen) 6195 len += buflen + 1; 6196 6197 if (len > NFS4_OPAQUE_LIMIT + 1) 6198 return -EINVAL; 6199 6200 /* 6201 * Since this string is allocated at mount time, and held until the 6202 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6203 * about a memory-reclaim deadlock. 6204 */ 6205 str = kmalloc(len, GFP_KERNEL); 6206 if (!str) 6207 return -ENOMEM; 6208 6209 rcu_read_lock(); 6210 if (buflen) 6211 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 6212 clp->cl_rpcclient->cl_nodename, buf, 6213 rpc_peeraddr2str(clp->cl_rpcclient, 6214 RPC_DISPLAY_ADDR)); 6215 else 6216 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 6217 clp->cl_rpcclient->cl_nodename, 6218 rpc_peeraddr2str(clp->cl_rpcclient, 6219 RPC_DISPLAY_ADDR)); 6220 rcu_read_unlock(); 6221 6222 clp->cl_owner_id = str; 6223 return 0; 6224} 6225 6226static int 6227nfs4_init_uniform_client_string(struct nfs_client *clp) 6228{ 6229 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6230 size_t buflen; 6231 size_t len; 6232 char *str; 6233 6234 if (clp->cl_owner_id != NULL) 6235 return 0; 6236 6237 len = 10 + 10 + 1 + 10 + 1 + 6238 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6239 6240 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6241 if (buflen) 6242 len += buflen + 1; 6243 6244 if (len > NFS4_OPAQUE_LIMIT + 1) 6245 return -EINVAL; 6246 6247 /* 6248 * Since this string is allocated at mount time, and held until the 6249 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6250 * about a memory-reclaim deadlock. 6251 */ 6252 str = kmalloc(len, GFP_KERNEL); 6253 if (!str) 6254 return -ENOMEM; 6255 6256 if (buflen) 6257 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 6258 clp->rpc_ops->version, clp->cl_minorversion, 6259 buf, clp->cl_rpcclient->cl_nodename); 6260 else 6261 scnprintf(str, len, "Linux NFSv%u.%u %s", 6262 clp->rpc_ops->version, clp->cl_minorversion, 6263 clp->cl_rpcclient->cl_nodename); 6264 clp->cl_owner_id = str; 6265 return 0; 6266} 6267 6268/* 6269 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6270 * services. Advertise one based on the address family of the 6271 * clientaddr. 6272 */ 6273static unsigned int 6274nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6275{ 6276 if (strchr(clp->cl_ipaddr, ':') != NULL) 6277 return scnprintf(buf, len, "tcp6"); 6278 else 6279 return scnprintf(buf, len, "tcp"); 6280} 6281 6282static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6283{ 6284 struct nfs4_setclientid *sc = calldata; 6285 6286 if (task->tk_status == 0) 6287 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6288} 6289 6290static const struct rpc_call_ops nfs4_setclientid_ops = { 6291 .rpc_call_done = nfs4_setclientid_done, 6292}; 6293 6294/** 6295 * nfs4_proc_setclientid - Negotiate client ID 6296 * @clp: state data structure 6297 * @program: RPC program for NFSv4 callback service 6298 * @port: IP port number for NFS4 callback service 6299 * @cred: credential to use for this call 6300 * @res: where to place the result 6301 * 6302 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6303 */ 6304int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6305 unsigned short port, const struct cred *cred, 6306 struct nfs4_setclientid_res *res) 6307{ 6308 nfs4_verifier sc_verifier; 6309 struct nfs4_setclientid setclientid = { 6310 .sc_verifier = &sc_verifier, 6311 .sc_prog = program, 6312 .sc_clnt = clp, 6313 }; 6314 struct rpc_message msg = { 6315 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6316 .rpc_argp = &setclientid, 6317 .rpc_resp = res, 6318 .rpc_cred = cred, 6319 }; 6320 struct rpc_task_setup task_setup_data = { 6321 .rpc_client = clp->cl_rpcclient, 6322 .rpc_message = &msg, 6323 .callback_ops = &nfs4_setclientid_ops, 6324 .callback_data = &setclientid, 6325 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6326 }; 6327 unsigned long now = jiffies; 6328 int status; 6329 6330 /* nfs_client_id4 */ 6331 nfs4_init_boot_verifier(clp, &sc_verifier); 6332 6333 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6334 status = nfs4_init_uniform_client_string(clp); 6335 else 6336 status = nfs4_init_nonuniform_client_string(clp); 6337 6338 if (status) 6339 goto out; 6340 6341 /* cb_client4 */ 6342 setclientid.sc_netid_len = 6343 nfs4_init_callback_netid(clp, 6344 setclientid.sc_netid, 6345 sizeof(setclientid.sc_netid)); 6346 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6347 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6348 clp->cl_ipaddr, port >> 8, port & 255); 6349 6350 dprintk("NFS call setclientid auth=%s, '%s'\n", 6351 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6352 clp->cl_owner_id); 6353 6354 status = nfs4_call_sync_custom(&task_setup_data); 6355 if (setclientid.sc_cred) { 6356 kfree(clp->cl_acceptor); 6357 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6358 put_rpccred(setclientid.sc_cred); 6359 } 6360 6361 if (status == 0) 6362 do_renew_lease(clp, now); 6363out: 6364 trace_nfs4_setclientid(clp, status); 6365 dprintk("NFS reply setclientid: %d\n", status); 6366 return status; 6367} 6368 6369/** 6370 * nfs4_proc_setclientid_confirm - Confirm client ID 6371 * @clp: state data structure 6372 * @arg: result of a previous SETCLIENTID 6373 * @cred: credential to use for this call 6374 * 6375 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6376 */ 6377int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6378 struct nfs4_setclientid_res *arg, 6379 const struct cred *cred) 6380{ 6381 struct rpc_message msg = { 6382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6383 .rpc_argp = arg, 6384 .rpc_cred = cred, 6385 }; 6386 int status; 6387 6388 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6389 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6390 clp->cl_clientid); 6391 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6392 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6393 trace_nfs4_setclientid_confirm(clp, status); 6394 dprintk("NFS reply setclientid_confirm: %d\n", status); 6395 return status; 6396} 6397 6398struct nfs4_delegreturndata { 6399 struct nfs4_delegreturnargs args; 6400 struct nfs4_delegreturnres res; 6401 struct nfs_fh fh; 6402 nfs4_stateid stateid; 6403 unsigned long timestamp; 6404 struct { 6405 struct nfs4_layoutreturn_args arg; 6406 struct nfs4_layoutreturn_res res; 6407 struct nfs4_xdr_opaque_data ld_private; 6408 u32 roc_barrier; 6409 bool roc; 6410 } lr; 6411 struct nfs_fattr fattr; 6412 int rpc_status; 6413 struct inode *inode; 6414}; 6415 6416static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6417{ 6418 struct nfs4_delegreturndata *data = calldata; 6419 struct nfs4_exception exception = { 6420 .inode = data->inode, 6421 .stateid = &data->stateid, 6422 .task_is_privileged = data->args.seq_args.sa_privileged, 6423 }; 6424 6425 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6426 return; 6427 6428 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6429 6430 /* Handle Layoutreturn errors */ 6431 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res, 6432 &data->res.lr_ret) == -EAGAIN) 6433 goto out_restart; 6434 6435 switch (task->tk_status) { 6436 case 0: 6437 renew_lease(data->res.server, data->timestamp); 6438 break; 6439 case -NFS4ERR_ADMIN_REVOKED: 6440 case -NFS4ERR_DELEG_REVOKED: 6441 case -NFS4ERR_EXPIRED: 6442 nfs4_free_revoked_stateid(data->res.server, 6443 data->args.stateid, 6444 task->tk_msg.rpc_cred); 6445 fallthrough; 6446 case -NFS4ERR_BAD_STATEID: 6447 case -NFS4ERR_STALE_STATEID: 6448 case -ETIMEDOUT: 6449 task->tk_status = 0; 6450 break; 6451 case -NFS4ERR_OLD_STATEID: 6452 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6453 nfs4_stateid_seqid_inc(&data->stateid); 6454 if (data->args.bitmask) { 6455 data->args.bitmask = NULL; 6456 data->res.fattr = NULL; 6457 } 6458 goto out_restart; 6459 case -NFS4ERR_ACCESS: 6460 if (data->args.bitmask) { 6461 data->args.bitmask = NULL; 6462 data->res.fattr = NULL; 6463 goto out_restart; 6464 } 6465 fallthrough; 6466 default: 6467 task->tk_status = nfs4_async_handle_exception(task, 6468 data->res.server, task->tk_status, 6469 &exception); 6470 if (exception.retry) 6471 goto out_restart; 6472 } 6473 nfs_delegation_mark_returned(data->inode, data->args.stateid); 6474 data->rpc_status = task->tk_status; 6475 return; 6476out_restart: 6477 task->tk_status = 0; 6478 rpc_restart_call_prepare(task); 6479} 6480 6481static void nfs4_delegreturn_release(void *calldata) 6482{ 6483 struct nfs4_delegreturndata *data = calldata; 6484 struct inode *inode = data->inode; 6485 6486 if (data->lr.roc) 6487 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6488 data->res.lr_ret); 6489 if (inode) { 6490 nfs4_fattr_set_prechange(&data->fattr, 6491 inode_peek_iversion_raw(inode)); 6492 nfs_refresh_inode(inode, &data->fattr); 6493 nfs_iput_and_deactive(inode); 6494 } 6495 kfree(calldata); 6496} 6497 6498static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6499{ 6500 struct nfs4_delegreturndata *d_data; 6501 struct pnfs_layout_hdr *lo; 6502 6503 d_data = (struct nfs4_delegreturndata *)data; 6504 6505 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { 6506 nfs4_sequence_done(task, &d_data->res.seq_res); 6507 return; 6508 } 6509 6510 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6511 if (lo && !pnfs_layout_is_valid(lo)) { 6512 d_data->args.lr_args = NULL; 6513 d_data->res.lr_res = NULL; 6514 } 6515 6516 nfs4_setup_sequence(d_data->res.server->nfs_client, 6517 &d_data->args.seq_args, 6518 &d_data->res.seq_res, 6519 task); 6520} 6521 6522static const struct rpc_call_ops nfs4_delegreturn_ops = { 6523 .rpc_call_prepare = nfs4_delegreturn_prepare, 6524 .rpc_call_done = nfs4_delegreturn_done, 6525 .rpc_release = nfs4_delegreturn_release, 6526}; 6527 6528static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6529{ 6530 struct nfs4_delegreturndata *data; 6531 struct nfs_server *server = NFS_SERVER(inode); 6532 struct rpc_task *task; 6533 struct rpc_message msg = { 6534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6535 .rpc_cred = cred, 6536 }; 6537 struct rpc_task_setup task_setup_data = { 6538 .rpc_client = server->client, 6539 .rpc_message = &msg, 6540 .callback_ops = &nfs4_delegreturn_ops, 6541 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 6542 }; 6543 int status = 0; 6544 6545 data = kzalloc(sizeof(*data), GFP_NOFS); 6546 if (data == NULL) 6547 return -ENOMEM; 6548 6549 nfs4_state_protect(server->nfs_client, 6550 NFS_SP4_MACH_CRED_CLEANUP, 6551 &task_setup_data.rpc_client, &msg); 6552 6553 data->args.fhandle = &data->fh; 6554 data->args.stateid = &data->stateid; 6555 nfs4_bitmask_set(data->args.bitmask_store, 6556 server->cache_consistency_bitmask, inode, server, 6557 NULL); 6558 data->args.bitmask = data->args.bitmask_store; 6559 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6560 nfs4_stateid_copy(&data->stateid, stateid); 6561 data->res.fattr = &data->fattr; 6562 data->res.server = server; 6563 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6564 data->lr.arg.ld_private = &data->lr.ld_private; 6565 nfs_fattr_init(data->res.fattr); 6566 data->timestamp = jiffies; 6567 data->rpc_status = 0; 6568 data->inode = nfs_igrab_and_active(inode); 6569 if (data->inode || issync) { 6570 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, 6571 cred); 6572 if (data->lr.roc) { 6573 data->args.lr_args = &data->lr.arg; 6574 data->res.lr_res = &data->lr.res; 6575 } 6576 } 6577 6578 if (!data->inode) 6579 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6580 1); 6581 else 6582 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6583 0); 6584 task_setup_data.callback_data = data; 6585 msg.rpc_argp = &data->args; 6586 msg.rpc_resp = &data->res; 6587 task = rpc_run_task(&task_setup_data); 6588 if (IS_ERR(task)) 6589 return PTR_ERR(task); 6590 if (!issync) 6591 goto out; 6592 status = rpc_wait_for_completion_task(task); 6593 if (status != 0) 6594 goto out; 6595 status = data->rpc_status; 6596out: 6597 rpc_put_task(task); 6598 return status; 6599} 6600 6601int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6602{ 6603 struct nfs_server *server = NFS_SERVER(inode); 6604 struct nfs4_exception exception = { }; 6605 int err; 6606 do { 6607 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 6608 trace_nfs4_delegreturn(inode, stateid, err); 6609 switch (err) { 6610 case -NFS4ERR_STALE_STATEID: 6611 case -NFS4ERR_EXPIRED: 6612 case 0: 6613 return 0; 6614 } 6615 err = nfs4_handle_exception(server, err, &exception); 6616 } while (exception.retry); 6617 return err; 6618} 6619 6620static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6621{ 6622 struct inode *inode = state->inode; 6623 struct nfs_server *server = NFS_SERVER(inode); 6624 struct nfs_client *clp = server->nfs_client; 6625 struct nfs_lockt_args arg = { 6626 .fh = NFS_FH(inode), 6627 .fl = request, 6628 }; 6629 struct nfs_lockt_res res = { 6630 .denied = request, 6631 }; 6632 struct rpc_message msg = { 6633 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6634 .rpc_argp = &arg, 6635 .rpc_resp = &res, 6636 .rpc_cred = state->owner->so_cred, 6637 }; 6638 struct nfs4_lock_state *lsp; 6639 int status; 6640 6641 arg.lock_owner.clientid = clp->cl_clientid; 6642 status = nfs4_set_lock_state(state, request); 6643 if (status != 0) 6644 goto out; 6645 lsp = request->fl_u.nfs4_fl.owner; 6646 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6647 arg.lock_owner.s_dev = server->s_dev; 6648 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6649 switch (status) { 6650 case 0: 6651 request->fl_type = F_UNLCK; 6652 break; 6653 case -NFS4ERR_DENIED: 6654 status = 0; 6655 } 6656 request->fl_ops->fl_release_private(request); 6657 request->fl_ops = NULL; 6658out: 6659 return status; 6660} 6661 6662static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6663{ 6664 struct nfs4_exception exception = { 6665 .interruptible = true, 6666 }; 6667 int err; 6668 6669 do { 6670 err = _nfs4_proc_getlk(state, cmd, request); 6671 trace_nfs4_get_lock(request, state, cmd, err); 6672 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6673 &exception); 6674 } while (exception.retry); 6675 return err; 6676} 6677 6678/* 6679 * Update the seqid of a lock stateid after receiving 6680 * NFS4ERR_OLD_STATEID 6681 */ 6682static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6683 struct nfs4_lock_state *lsp) 6684{ 6685 struct nfs4_state *state = lsp->ls_state; 6686 bool ret = false; 6687 6688 spin_lock(&state->state_lock); 6689 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6690 goto out; 6691 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6692 nfs4_stateid_seqid_inc(dst); 6693 else 6694 dst->seqid = lsp->ls_stateid.seqid; 6695 ret = true; 6696out: 6697 spin_unlock(&state->state_lock); 6698 return ret; 6699} 6700 6701static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 6702 struct nfs4_lock_state *lsp) 6703{ 6704 struct nfs4_state *state = lsp->ls_state; 6705 bool ret; 6706 6707 spin_lock(&state->state_lock); 6708 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 6709 nfs4_stateid_copy(dst, &lsp->ls_stateid); 6710 spin_unlock(&state->state_lock); 6711 return ret; 6712} 6713 6714struct nfs4_unlockdata { 6715 struct nfs_locku_args arg; 6716 struct nfs_locku_res res; 6717 struct nfs4_lock_state *lsp; 6718 struct nfs_open_context *ctx; 6719 struct nfs_lock_context *l_ctx; 6720 struct file_lock fl; 6721 struct nfs_server *server; 6722 unsigned long timestamp; 6723}; 6724 6725static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 6726 struct nfs_open_context *ctx, 6727 struct nfs4_lock_state *lsp, 6728 struct nfs_seqid *seqid) 6729{ 6730 struct nfs4_unlockdata *p; 6731 struct nfs4_state *state = lsp->ls_state; 6732 struct inode *inode = state->inode; 6733 6734 p = kzalloc(sizeof(*p), GFP_NOFS); 6735 if (p == NULL) 6736 return NULL; 6737 p->arg.fh = NFS_FH(inode); 6738 p->arg.fl = &p->fl; 6739 p->arg.seqid = seqid; 6740 p->res.seqid = seqid; 6741 p->lsp = lsp; 6742 /* Ensure we don't close file until we're done freeing locks! */ 6743 p->ctx = get_nfs_open_context(ctx); 6744 p->l_ctx = nfs_get_lock_context(ctx); 6745 locks_init_lock(&p->fl); 6746 locks_copy_lock(&p->fl, fl); 6747 p->server = NFS_SERVER(inode); 6748 spin_lock(&state->state_lock); 6749 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 6750 spin_unlock(&state->state_lock); 6751 return p; 6752} 6753 6754static void nfs4_locku_release_calldata(void *data) 6755{ 6756 struct nfs4_unlockdata *calldata = data; 6757 nfs_free_seqid(calldata->arg.seqid); 6758 nfs4_put_lock_state(calldata->lsp); 6759 nfs_put_lock_context(calldata->l_ctx); 6760 put_nfs_open_context(calldata->ctx); 6761 kfree(calldata); 6762} 6763 6764static void nfs4_locku_done(struct rpc_task *task, void *data) 6765{ 6766 struct nfs4_unlockdata *calldata = data; 6767 struct nfs4_exception exception = { 6768 .inode = calldata->lsp->ls_state->inode, 6769 .stateid = &calldata->arg.stateid, 6770 }; 6771 6772 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 6773 return; 6774 switch (task->tk_status) { 6775 case 0: 6776 renew_lease(calldata->server, calldata->timestamp); 6777 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 6778 if (nfs4_update_lock_stateid(calldata->lsp, 6779 &calldata->res.stateid)) 6780 break; 6781 fallthrough; 6782 case -NFS4ERR_ADMIN_REVOKED: 6783 case -NFS4ERR_EXPIRED: 6784 nfs4_free_revoked_stateid(calldata->server, 6785 &calldata->arg.stateid, 6786 task->tk_msg.rpc_cred); 6787 fallthrough; 6788 case -NFS4ERR_BAD_STATEID: 6789 case -NFS4ERR_STALE_STATEID: 6790 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 6791 calldata->lsp)) 6792 rpc_restart_call_prepare(task); 6793 break; 6794 case -NFS4ERR_OLD_STATEID: 6795 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 6796 calldata->lsp)) 6797 rpc_restart_call_prepare(task); 6798 break; 6799 default: 6800 task->tk_status = nfs4_async_handle_exception(task, 6801 calldata->server, task->tk_status, 6802 &exception); 6803 if (exception.retry) 6804 rpc_restart_call_prepare(task); 6805 } 6806 nfs_release_seqid(calldata->arg.seqid); 6807} 6808 6809static void nfs4_locku_prepare(struct rpc_task *task, void *data) 6810{ 6811 struct nfs4_unlockdata *calldata = data; 6812 6813 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 6814 nfs_async_iocounter_wait(task, calldata->l_ctx)) 6815 return; 6816 6817 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 6818 goto out_wait; 6819 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 6820 /* Note: exit _without_ running nfs4_locku_done */ 6821 goto out_no_action; 6822 } 6823 calldata->timestamp = jiffies; 6824 if (nfs4_setup_sequence(calldata->server->nfs_client, 6825 &calldata->arg.seq_args, 6826 &calldata->res.seq_res, 6827 task) != 0) 6828 nfs_release_seqid(calldata->arg.seqid); 6829 return; 6830out_no_action: 6831 task->tk_action = NULL; 6832out_wait: 6833 nfs4_sequence_done(task, &calldata->res.seq_res); 6834} 6835 6836static const struct rpc_call_ops nfs4_locku_ops = { 6837 .rpc_call_prepare = nfs4_locku_prepare, 6838 .rpc_call_done = nfs4_locku_done, 6839 .rpc_release = nfs4_locku_release_calldata, 6840}; 6841 6842static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 6843 struct nfs_open_context *ctx, 6844 struct nfs4_lock_state *lsp, 6845 struct nfs_seqid *seqid) 6846{ 6847 struct nfs4_unlockdata *data; 6848 struct rpc_message msg = { 6849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 6850 .rpc_cred = ctx->cred, 6851 }; 6852 struct rpc_task_setup task_setup_data = { 6853 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 6854 .rpc_message = &msg, 6855 .callback_ops = &nfs4_locku_ops, 6856 .workqueue = nfsiod_workqueue, 6857 .flags = RPC_TASK_ASYNC, 6858 }; 6859 6860 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 6861 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 6862 6863 /* Ensure this is an unlock - when canceling a lock, the 6864 * canceled lock is passed in, and it won't be an unlock. 6865 */ 6866 fl->fl_type = F_UNLCK; 6867 if (fl->fl_flags & FL_CLOSE) 6868 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 6869 6870 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 6871 if (data == NULL) { 6872 nfs_free_seqid(seqid); 6873 return ERR_PTR(-ENOMEM); 6874 } 6875 6876 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 6877 msg.rpc_argp = &data->arg; 6878 msg.rpc_resp = &data->res; 6879 task_setup_data.callback_data = data; 6880 return rpc_run_task(&task_setup_data); 6881} 6882 6883static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 6884{ 6885 struct inode *inode = state->inode; 6886 struct nfs4_state_owner *sp = state->owner; 6887 struct nfs_inode *nfsi = NFS_I(inode); 6888 struct nfs_seqid *seqid; 6889 struct nfs4_lock_state *lsp; 6890 struct rpc_task *task; 6891 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6892 int status = 0; 6893 unsigned char fl_flags = request->fl_flags; 6894 6895 status = nfs4_set_lock_state(state, request); 6896 /* Unlock _before_ we do the RPC call */ 6897 request->fl_flags |= FL_EXISTS; 6898 /* Exclude nfs_delegation_claim_locks() */ 6899 mutex_lock(&sp->so_delegreturn_mutex); 6900 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 6901 down_read(&nfsi->rwsem); 6902 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 6903 up_read(&nfsi->rwsem); 6904 mutex_unlock(&sp->so_delegreturn_mutex); 6905 goto out; 6906 } 6907 up_read(&nfsi->rwsem); 6908 mutex_unlock(&sp->so_delegreturn_mutex); 6909 if (status != 0) 6910 goto out; 6911 /* Is this a delegated lock? */ 6912 lsp = request->fl_u.nfs4_fl.owner; 6913 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 6914 goto out; 6915 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 6916 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 6917 status = -ENOMEM; 6918 if (IS_ERR(seqid)) 6919 goto out; 6920 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 6921 status = PTR_ERR(task); 6922 if (IS_ERR(task)) 6923 goto out; 6924 status = rpc_wait_for_completion_task(task); 6925 rpc_put_task(task); 6926out: 6927 request->fl_flags = fl_flags; 6928 trace_nfs4_unlock(request, state, F_SETLK, status); 6929 return status; 6930} 6931 6932struct nfs4_lockdata { 6933 struct nfs_lock_args arg; 6934 struct nfs_lock_res res; 6935 struct nfs4_lock_state *lsp; 6936 struct nfs_open_context *ctx; 6937 struct file_lock fl; 6938 unsigned long timestamp; 6939 int rpc_status; 6940 int cancelled; 6941 struct nfs_server *server; 6942}; 6943 6944static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 6945 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 6946 gfp_t gfp_mask) 6947{ 6948 struct nfs4_lockdata *p; 6949 struct inode *inode = lsp->ls_state->inode; 6950 struct nfs_server *server = NFS_SERVER(inode); 6951 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6952 6953 p = kzalloc(sizeof(*p), gfp_mask); 6954 if (p == NULL) 6955 return NULL; 6956 6957 p->arg.fh = NFS_FH(inode); 6958 p->arg.fl = &p->fl; 6959 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 6960 if (IS_ERR(p->arg.open_seqid)) 6961 goto out_free; 6962 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 6963 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 6964 if (IS_ERR(p->arg.lock_seqid)) 6965 goto out_free_seqid; 6966 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 6967 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 6968 p->arg.lock_owner.s_dev = server->s_dev; 6969 p->res.lock_seqid = p->arg.lock_seqid; 6970 p->lsp = lsp; 6971 p->server = server; 6972 p->ctx = get_nfs_open_context(ctx); 6973 locks_init_lock(&p->fl); 6974 locks_copy_lock(&p->fl, fl); 6975 return p; 6976out_free_seqid: 6977 nfs_free_seqid(p->arg.open_seqid); 6978out_free: 6979 kfree(p); 6980 return NULL; 6981} 6982 6983static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 6984{ 6985 struct nfs4_lockdata *data = calldata; 6986 struct nfs4_state *state = data->lsp->ls_state; 6987 6988 dprintk("%s: begin!\n", __func__); 6989 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 6990 goto out_wait; 6991 /* Do we need to do an open_to_lock_owner? */ 6992 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 6993 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 6994 goto out_release_lock_seqid; 6995 } 6996 nfs4_stateid_copy(&data->arg.open_stateid, 6997 &state->open_stateid); 6998 data->arg.new_lock_owner = 1; 6999 data->res.open_seqid = data->arg.open_seqid; 7000 } else { 7001 data->arg.new_lock_owner = 0; 7002 nfs4_stateid_copy(&data->arg.lock_stateid, 7003 &data->lsp->ls_stateid); 7004 } 7005 if (!nfs4_valid_open_stateid(state)) { 7006 data->rpc_status = -EBADF; 7007 task->tk_action = NULL; 7008 goto out_release_open_seqid; 7009 } 7010 data->timestamp = jiffies; 7011 if (nfs4_setup_sequence(data->server->nfs_client, 7012 &data->arg.seq_args, 7013 &data->res.seq_res, 7014 task) == 0) 7015 return; 7016out_release_open_seqid: 7017 nfs_release_seqid(data->arg.open_seqid); 7018out_release_lock_seqid: 7019 nfs_release_seqid(data->arg.lock_seqid); 7020out_wait: 7021 nfs4_sequence_done(task, &data->res.seq_res); 7022 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 7023} 7024 7025static void nfs4_lock_done(struct rpc_task *task, void *calldata) 7026{ 7027 struct nfs4_lockdata *data = calldata; 7028 struct nfs4_lock_state *lsp = data->lsp; 7029 struct nfs_server *server = NFS_SERVER(d_inode(data->ctx->dentry)); 7030 7031 dprintk("%s: begin!\n", __func__); 7032 7033 if (!nfs4_sequence_done(task, &data->res.seq_res)) 7034 return; 7035 7036 data->rpc_status = task->tk_status; 7037 switch (task->tk_status) { 7038 case 0: 7039 renew_lease(server, data->timestamp); 7040 if (data->arg.new_lock && !data->cancelled) { 7041 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 7042 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 7043 goto out_restart; 7044 } 7045 if (data->arg.new_lock_owner != 0) { 7046 nfs_confirm_seqid(&lsp->ls_seqid, 0); 7047 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 7048 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 7049 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 7050 goto out_restart; 7051 break; 7052 case -NFS4ERR_OLD_STATEID: 7053 if (data->arg.new_lock_owner != 0 && 7054 nfs4_refresh_open_old_stateid(&data->arg.open_stateid, 7055 lsp->ls_state)) 7056 goto out_restart; 7057 if (nfs4_refresh_lock_old_stateid(&data->arg.lock_stateid, lsp)) 7058 goto out_restart; 7059 fallthrough; 7060 case -NFS4ERR_BAD_STATEID: 7061 case -NFS4ERR_STALE_STATEID: 7062 case -NFS4ERR_EXPIRED: 7063 if (data->arg.new_lock_owner != 0) { 7064 if (!nfs4_stateid_match(&data->arg.open_stateid, 7065 &lsp->ls_state->open_stateid)) 7066 goto out_restart; 7067 else if (nfs4_async_handle_error(task, server, lsp->ls_state, NULL) == -EAGAIN) 7068 goto out_restart; 7069 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 7070 &lsp->ls_stateid)) 7071 goto out_restart; 7072 } 7073out_done: 7074 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 7075 return; 7076out_restart: 7077 if (!data->cancelled) 7078 rpc_restart_call_prepare(task); 7079 goto out_done; 7080} 7081 7082static void nfs4_lock_release(void *calldata) 7083{ 7084 struct nfs4_lockdata *data = calldata; 7085 7086 dprintk("%s: begin!\n", __func__); 7087 nfs_free_seqid(data->arg.open_seqid); 7088 if (data->cancelled && data->rpc_status == 0) { 7089 struct rpc_task *task; 7090 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 7091 data->arg.lock_seqid); 7092 if (!IS_ERR(task)) 7093 rpc_put_task_async(task); 7094 dprintk("%s: cancelling lock!\n", __func__); 7095 } else 7096 nfs_free_seqid(data->arg.lock_seqid); 7097 nfs4_put_lock_state(data->lsp); 7098 put_nfs_open_context(data->ctx); 7099 kfree(data); 7100 dprintk("%s: done!\n", __func__); 7101} 7102 7103static const struct rpc_call_ops nfs4_lock_ops = { 7104 .rpc_call_prepare = nfs4_lock_prepare, 7105 .rpc_call_done = nfs4_lock_done, 7106 .rpc_release = nfs4_lock_release, 7107}; 7108 7109static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 7110{ 7111 switch (error) { 7112 case -NFS4ERR_ADMIN_REVOKED: 7113 case -NFS4ERR_EXPIRED: 7114 case -NFS4ERR_BAD_STATEID: 7115 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7116 if (new_lock_owner != 0 || 7117 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 7118 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 7119 break; 7120 case -NFS4ERR_STALE_STATEID: 7121 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7122 nfs4_schedule_lease_recovery(server->nfs_client); 7123 } 7124} 7125 7126static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 7127{ 7128 struct nfs4_lockdata *data; 7129 struct rpc_task *task; 7130 struct rpc_message msg = { 7131 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 7132 .rpc_cred = state->owner->so_cred, 7133 }; 7134 struct rpc_task_setup task_setup_data = { 7135 .rpc_client = NFS_CLIENT(state->inode), 7136 .rpc_message = &msg, 7137 .callback_ops = &nfs4_lock_ops, 7138 .workqueue = nfsiod_workqueue, 7139 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 7140 }; 7141 int ret; 7142 7143 dprintk("%s: begin!\n", __func__); 7144 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 7145 fl->fl_u.nfs4_fl.owner, 7146 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 7147 if (data == NULL) 7148 return -ENOMEM; 7149 if (IS_SETLKW(cmd)) 7150 data->arg.block = 1; 7151 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 7152 recovery_type > NFS_LOCK_NEW); 7153 msg.rpc_argp = &data->arg; 7154 msg.rpc_resp = &data->res; 7155 task_setup_data.callback_data = data; 7156 if (recovery_type > NFS_LOCK_NEW) { 7157 if (recovery_type == NFS_LOCK_RECLAIM) 7158 data->arg.reclaim = NFS_LOCK_RECLAIM; 7159 } else 7160 data->arg.new_lock = 1; 7161 task = rpc_run_task(&task_setup_data); 7162 if (IS_ERR(task)) 7163 return PTR_ERR(task); 7164 ret = rpc_wait_for_completion_task(task); 7165 if (ret == 0) { 7166 ret = data->rpc_status; 7167 if (ret) 7168 nfs4_handle_setlk_error(data->server, data->lsp, 7169 data->arg.new_lock_owner, ret); 7170 } else 7171 data->cancelled = true; 7172 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 7173 rpc_put_task(task); 7174 dprintk("%s: done, ret = %d!\n", __func__, ret); 7175 return ret; 7176} 7177 7178static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 7179{ 7180 struct nfs_server *server = NFS_SERVER(state->inode); 7181 struct nfs4_exception exception = { 7182 .inode = state->inode, 7183 }; 7184 int err; 7185 7186 do { 7187 /* Cache the lock if possible... */ 7188 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7189 return 0; 7190 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 7191 if (err != -NFS4ERR_DELAY) 7192 break; 7193 nfs4_handle_exception(server, err, &exception); 7194 } while (exception.retry); 7195 return err; 7196} 7197 7198static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 7199{ 7200 struct nfs_server *server = NFS_SERVER(state->inode); 7201 struct nfs4_exception exception = { 7202 .inode = state->inode, 7203 }; 7204 int err; 7205 7206 err = nfs4_set_lock_state(state, request); 7207 if (err != 0) 7208 return err; 7209 if (!recover_lost_locks) { 7210 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 7211 return 0; 7212 } 7213 do { 7214 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7215 return 0; 7216 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 7217 switch (err) { 7218 default: 7219 goto out; 7220 case -NFS4ERR_GRACE: 7221 case -NFS4ERR_DELAY: 7222 nfs4_handle_exception(server, err, &exception); 7223 err = 0; 7224 } 7225 } while (exception.retry); 7226out: 7227 return err; 7228} 7229 7230#if defined(CONFIG_NFS_V4_1) 7231static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 7232{ 7233 struct nfs4_lock_state *lsp; 7234 int status; 7235 7236 status = nfs4_set_lock_state(state, request); 7237 if (status != 0) 7238 return status; 7239 lsp = request->fl_u.nfs4_fl.owner; 7240 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 7241 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 7242 return 0; 7243 return nfs4_lock_expired(state, request); 7244} 7245#endif 7246 7247static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7248{ 7249 struct nfs_inode *nfsi = NFS_I(state->inode); 7250 struct nfs4_state_owner *sp = state->owner; 7251 unsigned char fl_flags = request->fl_flags; 7252 int status; 7253 7254 request->fl_flags |= FL_ACCESS; 7255 status = locks_lock_inode_wait(state->inode, request); 7256 if (status < 0) 7257 goto out; 7258 mutex_lock(&sp->so_delegreturn_mutex); 7259 down_read(&nfsi->rwsem); 7260 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 7261 /* Yes: cache locks! */ 7262 /* ...but avoid races with delegation recall... */ 7263 request->fl_flags = fl_flags & ~FL_SLEEP; 7264 status = locks_lock_inode_wait(state->inode, request); 7265 up_read(&nfsi->rwsem); 7266 mutex_unlock(&sp->so_delegreturn_mutex); 7267 goto out; 7268 } 7269 up_read(&nfsi->rwsem); 7270 mutex_unlock(&sp->so_delegreturn_mutex); 7271 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 7272out: 7273 request->fl_flags = fl_flags; 7274 return status; 7275} 7276 7277static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7278{ 7279 struct nfs4_exception exception = { 7280 .state = state, 7281 .inode = state->inode, 7282 .interruptible = true, 7283 }; 7284 int err; 7285 7286 do { 7287 err = _nfs4_proc_setlk(state, cmd, request); 7288 if (err == -NFS4ERR_DENIED) 7289 err = -EAGAIN; 7290 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7291 err, &exception); 7292 } while (exception.retry); 7293 return err; 7294} 7295 7296#define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7297#define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7298 7299static int 7300nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7301 struct file_lock *request) 7302{ 7303 int status = -ERESTARTSYS; 7304 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7305 7306 while(!signalled()) { 7307 status = nfs4_proc_setlk(state, cmd, request); 7308 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7309 break; 7310 freezable_schedule_timeout_interruptible(timeout); 7311 timeout *= 2; 7312 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7313 status = -ERESTARTSYS; 7314 } 7315 return status; 7316} 7317 7318#ifdef CONFIG_NFS_V4_1 7319struct nfs4_lock_waiter { 7320 struct task_struct *task; 7321 struct inode *inode; 7322 struct nfs_lowner *owner; 7323}; 7324 7325static int 7326nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7327{ 7328 int ret; 7329 struct nfs4_lock_waiter *waiter = wait->private; 7330 7331 /* NULL key means to wake up everyone */ 7332 if (key) { 7333 struct cb_notify_lock_args *cbnl = key; 7334 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7335 *wowner = waiter->owner; 7336 7337 /* Only wake if the callback was for the same owner. */ 7338 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7339 return 0; 7340 7341 /* Make sure it's for the right inode */ 7342 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7343 return 0; 7344 } 7345 7346 /* override "private" so we can use default_wake_function */ 7347 wait->private = waiter->task; 7348 ret = woken_wake_function(wait, mode, flags, key); 7349 if (ret) 7350 list_del_init(&wait->entry); 7351 wait->private = waiter; 7352 return ret; 7353} 7354 7355static int 7356nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7357{ 7358 int status = -ERESTARTSYS; 7359 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7360 struct nfs_server *server = NFS_SERVER(state->inode); 7361 struct nfs_client *clp = server->nfs_client; 7362 wait_queue_head_t *q = &clp->cl_lock_waitq; 7363 struct nfs_lowner owner = { .clientid = clp->cl_clientid, 7364 .id = lsp->ls_seqid.owner_id, 7365 .s_dev = server->s_dev }; 7366 struct nfs4_lock_waiter waiter = { .task = current, 7367 .inode = state->inode, 7368 .owner = &owner}; 7369 wait_queue_entry_t wait; 7370 7371 /* Don't bother with waitqueue if we don't expect a callback */ 7372 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7373 return nfs4_retry_setlk_simple(state, cmd, request); 7374 7375 init_wait(&wait); 7376 wait.private = &waiter; 7377 wait.func = nfs4_wake_lock_waiter; 7378 7379 while(!signalled()) { 7380 add_wait_queue(q, &wait); 7381 status = nfs4_proc_setlk(state, cmd, request); 7382 if ((status != -EAGAIN) || IS_SETLK(cmd)) { 7383 finish_wait(q, &wait); 7384 break; 7385 } 7386 7387 status = -ERESTARTSYS; 7388 freezer_do_not_count(); 7389 wait_woken(&wait, TASK_INTERRUPTIBLE, NFS4_LOCK_MAXTIMEOUT); 7390 freezer_count(); 7391 finish_wait(q, &wait); 7392 } 7393 7394 return status; 7395} 7396#else /* !CONFIG_NFS_V4_1 */ 7397static inline int 7398nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7399{ 7400 return nfs4_retry_setlk_simple(state, cmd, request); 7401} 7402#endif 7403 7404static int 7405nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7406{ 7407 struct nfs_open_context *ctx; 7408 struct nfs4_state *state; 7409 int status; 7410 7411 /* verify open state */ 7412 ctx = nfs_file_open_context(filp); 7413 state = ctx->state; 7414 7415 if (IS_GETLK(cmd)) { 7416 if (state != NULL) 7417 return nfs4_proc_getlk(state, F_GETLK, request); 7418 return 0; 7419 } 7420 7421 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7422 return -EINVAL; 7423 7424 if (request->fl_type == F_UNLCK) { 7425 if (state != NULL) 7426 return nfs4_proc_unlck(state, cmd, request); 7427 return 0; 7428 } 7429 7430 if (state == NULL) 7431 return -ENOLCK; 7432 7433 if ((request->fl_flags & FL_POSIX) && 7434 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7435 return -ENOLCK; 7436 7437 /* 7438 * Don't rely on the VFS having checked the file open mode, 7439 * since it won't do this for flock() locks. 7440 */ 7441 switch (request->fl_type) { 7442 case F_RDLCK: 7443 if (!(filp->f_mode & FMODE_READ)) 7444 return -EBADF; 7445 break; 7446 case F_WRLCK: 7447 if (!(filp->f_mode & FMODE_WRITE)) 7448 return -EBADF; 7449 } 7450 7451 status = nfs4_set_lock_state(state, request); 7452 if (status != 0) 7453 return status; 7454 7455 return nfs4_retry_setlk(state, cmd, request); 7456} 7457 7458int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7459{ 7460 struct nfs_server *server = NFS_SERVER(state->inode); 7461 int err; 7462 7463 err = nfs4_set_lock_state(state, fl); 7464 if (err != 0) 7465 return err; 7466 do { 7467 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7468 if (err != -NFS4ERR_DELAY) 7469 break; 7470 ssleep(1); 7471 } while (err == -NFS4ERR_DELAY); 7472 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7473} 7474 7475struct nfs_release_lockowner_data { 7476 struct nfs4_lock_state *lsp; 7477 struct nfs_server *server; 7478 struct nfs_release_lockowner_args args; 7479 struct nfs_release_lockowner_res res; 7480 unsigned long timestamp; 7481}; 7482 7483static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7484{ 7485 struct nfs_release_lockowner_data *data = calldata; 7486 struct nfs_server *server = data->server; 7487 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7488 &data->res.seq_res, task); 7489 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7490 data->timestamp = jiffies; 7491} 7492 7493static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7494{ 7495 struct nfs_release_lockowner_data *data = calldata; 7496 struct nfs_server *server = data->server; 7497 7498 nfs40_sequence_done(task, &data->res.seq_res); 7499 7500 switch (task->tk_status) { 7501 case 0: 7502 renew_lease(server, data->timestamp); 7503 break; 7504 case -NFS4ERR_STALE_CLIENTID: 7505 case -NFS4ERR_EXPIRED: 7506 nfs4_schedule_lease_recovery(server->nfs_client); 7507 break; 7508 case -NFS4ERR_LEASE_MOVED: 7509 case -NFS4ERR_DELAY: 7510 if (nfs4_async_handle_error(task, server, 7511 NULL, NULL) == -EAGAIN) 7512 rpc_restart_call_prepare(task); 7513 } 7514} 7515 7516static void nfs4_release_lockowner_release(void *calldata) 7517{ 7518 struct nfs_release_lockowner_data *data = calldata; 7519 nfs4_free_lock_state(data->server, data->lsp); 7520 kfree(calldata); 7521} 7522 7523static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7524 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7525 .rpc_call_done = nfs4_release_lockowner_done, 7526 .rpc_release = nfs4_release_lockowner_release, 7527}; 7528 7529static void 7530nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7531{ 7532 struct nfs_release_lockowner_data *data; 7533 struct rpc_message msg = { 7534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7535 }; 7536 7537 if (server->nfs_client->cl_mvops->minor_version != 0) 7538 return; 7539 7540 data = kmalloc(sizeof(*data), GFP_NOFS); 7541 if (!data) 7542 return; 7543 data->lsp = lsp; 7544 data->server = server; 7545 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7546 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7547 data->args.lock_owner.s_dev = server->s_dev; 7548 7549 msg.rpc_argp = &data->args; 7550 msg.rpc_resp = &data->res; 7551 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7552 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7553} 7554 7555#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7556 7557static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7558 struct dentry *unused, struct inode *inode, 7559 const char *key, const void *buf, 7560 size_t buflen, int flags) 7561{ 7562 return nfs4_proc_set_acl(inode, buf, buflen); 7563} 7564 7565static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7566 struct dentry *unused, struct inode *inode, 7567 const char *key, void *buf, size_t buflen) 7568{ 7569 return nfs4_proc_get_acl(inode, buf, buflen); 7570} 7571 7572static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7573{ 7574 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 7575} 7576 7577#ifdef CONFIG_NFS_V4_SECURITY_LABEL 7578 7579static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7580 struct dentry *unused, struct inode *inode, 7581 const char *key, const void *buf, 7582 size_t buflen, int flags) 7583{ 7584 if (security_ismaclabel(key)) 7585 return nfs4_set_security_label(inode, buf, buflen); 7586 7587 return -EOPNOTSUPP; 7588} 7589 7590static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7591 struct dentry *unused, struct inode *inode, 7592 const char *key, void *buf, size_t buflen) 7593{ 7594 if (security_ismaclabel(key)) 7595 return nfs4_get_security_label(inode, buf, buflen); 7596 return -EOPNOTSUPP; 7597} 7598 7599static ssize_t 7600nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7601{ 7602 int len = 0; 7603 7604 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7605 len = security_inode_listsecurity(inode, list, list_len); 7606 if (len >= 0 && list_len && len > list_len) 7607 return -ERANGE; 7608 } 7609 return len; 7610} 7611 7612static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7613 .prefix = XATTR_SECURITY_PREFIX, 7614 .get = nfs4_xattr_get_nfs4_label, 7615 .set = nfs4_xattr_set_nfs4_label, 7616}; 7617 7618#else 7619 7620static ssize_t 7621nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7622{ 7623 return 0; 7624} 7625 7626#endif 7627 7628#ifdef CONFIG_NFS_V4_2 7629static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, 7630 struct dentry *unused, struct inode *inode, 7631 const char *key, const void *buf, 7632 size_t buflen, int flags) 7633{ 7634 u32 mask; 7635 int ret; 7636 7637 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7638 return -EOPNOTSUPP; 7639 7640 /* 7641 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA* 7642 * flags right now. Handling of xattr operations use the normal 7643 * file read/write permissions. 7644 * 7645 * Just in case the server has other ideas (which RFC 8276 allows), 7646 * do a cached access check for the XA* flags to possibly avoid 7647 * doing an RPC and getting EACCES back. 7648 */ 7649 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7650 if (!(mask & NFS_ACCESS_XAWRITE)) 7651 return -EACCES; 7652 } 7653 7654 if (buf == NULL) { 7655 ret = nfs42_proc_removexattr(inode, key); 7656 if (!ret) 7657 nfs4_xattr_cache_remove(inode, key); 7658 } else { 7659 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags); 7660 if (!ret) 7661 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen); 7662 } 7663 7664 return ret; 7665} 7666 7667static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler, 7668 struct dentry *unused, struct inode *inode, 7669 const char *key, void *buf, size_t buflen) 7670{ 7671 u32 mask; 7672 ssize_t ret; 7673 7674 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7675 return -EOPNOTSUPP; 7676 7677 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7678 if (!(mask & NFS_ACCESS_XAREAD)) 7679 return -EACCES; 7680 } 7681 7682 ret = nfs_revalidate_inode(NFS_SERVER(inode), inode); 7683 if (ret) 7684 return ret; 7685 7686 ret = nfs4_xattr_cache_get(inode, key, buf, buflen); 7687 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7688 return ret; 7689 7690 ret = nfs42_proc_getxattr(inode, key, buf, buflen); 7691 7692 return ret; 7693} 7694 7695static ssize_t 7696nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7697{ 7698 u64 cookie; 7699 bool eof; 7700 ssize_t ret, size; 7701 char *buf; 7702 size_t buflen; 7703 u32 mask; 7704 7705 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7706 return 0; 7707 7708 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7709 if (!(mask & NFS_ACCESS_XALIST)) 7710 return 0; 7711 } 7712 7713 ret = nfs_revalidate_inode(NFS_SERVER(inode), inode); 7714 if (ret) 7715 return ret; 7716 7717 ret = nfs4_xattr_cache_list(inode, list, list_len); 7718 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7719 return ret; 7720 7721 cookie = 0; 7722 eof = false; 7723 buflen = list_len ? list_len : XATTR_LIST_MAX; 7724 buf = list_len ? list : NULL; 7725 size = 0; 7726 7727 while (!eof) { 7728 ret = nfs42_proc_listxattrs(inode, buf, buflen, 7729 &cookie, &eof); 7730 if (ret < 0) 7731 return ret; 7732 7733 if (list_len) { 7734 buf += ret; 7735 buflen -= ret; 7736 } 7737 size += ret; 7738 } 7739 7740 if (list_len) 7741 nfs4_xattr_cache_set_list(inode, list, size); 7742 7743 return size; 7744} 7745 7746#else 7747 7748static ssize_t 7749nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7750{ 7751 return 0; 7752} 7753#endif /* CONFIG_NFS_V4_2 */ 7754 7755/* 7756 * nfs_fhget will use either the mounted_on_fileid or the fileid 7757 */ 7758static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 7759{ 7760 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 7761 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 7762 (fattr->valid & NFS_ATTR_FATTR_FSID) && 7763 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 7764 return; 7765 7766 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 7767 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 7768 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 7769 fattr->nlink = 2; 7770} 7771 7772static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7773 const struct qstr *name, 7774 struct nfs4_fs_locations *fs_locations, 7775 struct page *page) 7776{ 7777 struct nfs_server *server = NFS_SERVER(dir); 7778 u32 bitmask[3]; 7779 struct nfs4_fs_locations_arg args = { 7780 .dir_fh = NFS_FH(dir), 7781 .name = name, 7782 .page = page, 7783 .bitmask = bitmask, 7784 }; 7785 struct nfs4_fs_locations_res res = { 7786 .fs_locations = fs_locations, 7787 }; 7788 struct rpc_message msg = { 7789 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7790 .rpc_argp = &args, 7791 .rpc_resp = &res, 7792 }; 7793 int status; 7794 7795 dprintk("%s: start\n", __func__); 7796 7797 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 7798 bitmask[1] = nfs4_fattr_bitmap[1]; 7799 7800 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 7801 * is not supported */ 7802 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 7803 bitmask[0] &= ~FATTR4_WORD0_FILEID; 7804 else 7805 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 7806 7807 nfs_fattr_init(&fs_locations->fattr); 7808 fs_locations->server = server; 7809 fs_locations->nlocations = 0; 7810 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 7811 dprintk("%s: returned status = %d\n", __func__, status); 7812 return status; 7813} 7814 7815int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7816 const struct qstr *name, 7817 struct nfs4_fs_locations *fs_locations, 7818 struct page *page) 7819{ 7820 struct nfs4_exception exception = { 7821 .interruptible = true, 7822 }; 7823 int err; 7824 do { 7825 err = _nfs4_proc_fs_locations(client, dir, name, 7826 fs_locations, page); 7827 trace_nfs4_get_fs_locations(dir, name, err); 7828 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7829 &exception); 7830 } while (exception.retry); 7831 return err; 7832} 7833 7834/* 7835 * This operation also signals the server that this client is 7836 * performing migration recovery. The server can stop returning 7837 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 7838 * appended to this compound to identify the client ID which is 7839 * performing recovery. 7840 */ 7841static int _nfs40_proc_get_locations(struct inode *inode, 7842 struct nfs4_fs_locations *locations, 7843 struct page *page, const struct cred *cred) 7844{ 7845 struct nfs_server *server = NFS_SERVER(inode); 7846 struct rpc_clnt *clnt = server->client; 7847 u32 bitmask[2] = { 7848 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7849 }; 7850 struct nfs4_fs_locations_arg args = { 7851 .clientid = server->nfs_client->cl_clientid, 7852 .fh = NFS_FH(inode), 7853 .page = page, 7854 .bitmask = bitmask, 7855 .migration = 1, /* skip LOOKUP */ 7856 .renew = 1, /* append RENEW */ 7857 }; 7858 struct nfs4_fs_locations_res res = { 7859 .fs_locations = locations, 7860 .migration = 1, 7861 .renew = 1, 7862 }; 7863 struct rpc_message msg = { 7864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7865 .rpc_argp = &args, 7866 .rpc_resp = &res, 7867 .rpc_cred = cred, 7868 }; 7869 unsigned long now = jiffies; 7870 int status; 7871 7872 nfs_fattr_init(&locations->fattr); 7873 locations->server = server; 7874 locations->nlocations = 0; 7875 7876 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7877 status = nfs4_call_sync_sequence(clnt, server, &msg, 7878 &args.seq_args, &res.seq_res); 7879 if (status) 7880 return status; 7881 7882 renew_lease(server, now); 7883 return 0; 7884} 7885 7886#ifdef CONFIG_NFS_V4_1 7887 7888/* 7889 * This operation also signals the server that this client is 7890 * performing migration recovery. The server can stop asserting 7891 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 7892 * performing this operation is identified in the SEQUENCE 7893 * operation in this compound. 7894 * 7895 * When the client supports GETATTR(fs_locations_info), it can 7896 * be plumbed in here. 7897 */ 7898static int _nfs41_proc_get_locations(struct inode *inode, 7899 struct nfs4_fs_locations *locations, 7900 struct page *page, const struct cred *cred) 7901{ 7902 struct nfs_server *server = NFS_SERVER(inode); 7903 struct rpc_clnt *clnt = server->client; 7904 u32 bitmask[2] = { 7905 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7906 }; 7907 struct nfs4_fs_locations_arg args = { 7908 .fh = NFS_FH(inode), 7909 .page = page, 7910 .bitmask = bitmask, 7911 .migration = 1, /* skip LOOKUP */ 7912 }; 7913 struct nfs4_fs_locations_res res = { 7914 .fs_locations = locations, 7915 .migration = 1, 7916 }; 7917 struct rpc_message msg = { 7918 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7919 .rpc_argp = &args, 7920 .rpc_resp = &res, 7921 .rpc_cred = cred, 7922 }; 7923 int status; 7924 7925 nfs_fattr_init(&locations->fattr); 7926 locations->server = server; 7927 locations->nlocations = 0; 7928 7929 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7930 status = nfs4_call_sync_sequence(clnt, server, &msg, 7931 &args.seq_args, &res.seq_res); 7932 if (status == NFS4_OK && 7933 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7934 status = -NFS4ERR_LEASE_MOVED; 7935 return status; 7936} 7937 7938#endif /* CONFIG_NFS_V4_1 */ 7939 7940/** 7941 * nfs4_proc_get_locations - discover locations for a migrated FSID 7942 * @inode: inode on FSID that is migrating 7943 * @locations: result of query 7944 * @page: buffer 7945 * @cred: credential to use for this operation 7946 * 7947 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 7948 * operation failed, or a negative errno if a local error occurred. 7949 * 7950 * On success, "locations" is filled in, but if the server has 7951 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 7952 * asserted. 7953 * 7954 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 7955 * from this client that require migration recovery. 7956 */ 7957int nfs4_proc_get_locations(struct inode *inode, 7958 struct nfs4_fs_locations *locations, 7959 struct page *page, const struct cred *cred) 7960{ 7961 struct nfs_server *server = NFS_SERVER(inode); 7962 struct nfs_client *clp = server->nfs_client; 7963 const struct nfs4_mig_recovery_ops *ops = 7964 clp->cl_mvops->mig_recovery_ops; 7965 struct nfs4_exception exception = { 7966 .interruptible = true, 7967 }; 7968 int status; 7969 7970 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7971 (unsigned long long)server->fsid.major, 7972 (unsigned long long)server->fsid.minor, 7973 clp->cl_hostname); 7974 nfs_display_fhandle(NFS_FH(inode), __func__); 7975 7976 do { 7977 status = ops->get_locations(inode, locations, page, cred); 7978 if (status != -NFS4ERR_DELAY) 7979 break; 7980 nfs4_handle_exception(server, status, &exception); 7981 } while (exception.retry); 7982 return status; 7983} 7984 7985/* 7986 * This operation also signals the server that this client is 7987 * performing "lease moved" recovery. The server can stop 7988 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 7989 * is appended to this compound to identify the client ID which is 7990 * performing recovery. 7991 */ 7992static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 7993{ 7994 struct nfs_server *server = NFS_SERVER(inode); 7995 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 7996 struct rpc_clnt *clnt = server->client; 7997 struct nfs4_fsid_present_arg args = { 7998 .fh = NFS_FH(inode), 7999 .clientid = clp->cl_clientid, 8000 .renew = 1, /* append RENEW */ 8001 }; 8002 struct nfs4_fsid_present_res res = { 8003 .renew = 1, 8004 }; 8005 struct rpc_message msg = { 8006 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8007 .rpc_argp = &args, 8008 .rpc_resp = &res, 8009 .rpc_cred = cred, 8010 }; 8011 unsigned long now = jiffies; 8012 int status; 8013 8014 res.fh = nfs_alloc_fhandle(); 8015 if (res.fh == NULL) 8016 return -ENOMEM; 8017 8018 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8019 status = nfs4_call_sync_sequence(clnt, server, &msg, 8020 &args.seq_args, &res.seq_res); 8021 nfs_free_fhandle(res.fh); 8022 if (status) 8023 return status; 8024 8025 do_renew_lease(clp, now); 8026 return 0; 8027} 8028 8029#ifdef CONFIG_NFS_V4_1 8030 8031/* 8032 * This operation also signals the server that this client is 8033 * performing "lease moved" recovery. The server can stop asserting 8034 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 8035 * this operation is identified in the SEQUENCE operation in this 8036 * compound. 8037 */ 8038static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 8039{ 8040 struct nfs_server *server = NFS_SERVER(inode); 8041 struct rpc_clnt *clnt = server->client; 8042 struct nfs4_fsid_present_arg args = { 8043 .fh = NFS_FH(inode), 8044 }; 8045 struct nfs4_fsid_present_res res = { 8046 }; 8047 struct rpc_message msg = { 8048 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8049 .rpc_argp = &args, 8050 .rpc_resp = &res, 8051 .rpc_cred = cred, 8052 }; 8053 int status; 8054 8055 res.fh = nfs_alloc_fhandle(); 8056 if (res.fh == NULL) 8057 return -ENOMEM; 8058 8059 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8060 status = nfs4_call_sync_sequence(clnt, server, &msg, 8061 &args.seq_args, &res.seq_res); 8062 nfs_free_fhandle(res.fh); 8063 if (status == NFS4_OK && 8064 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8065 status = -NFS4ERR_LEASE_MOVED; 8066 return status; 8067} 8068 8069#endif /* CONFIG_NFS_V4_1 */ 8070 8071/** 8072 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 8073 * @inode: inode on FSID to check 8074 * @cred: credential to use for this operation 8075 * 8076 * Server indicates whether the FSID is present, moved, or not 8077 * recognized. This operation is necessary to clear a LEASE_MOVED 8078 * condition for this client ID. 8079 * 8080 * Returns NFS4_OK if the FSID is present on this server, 8081 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 8082 * NFS4ERR code if some error occurred on the server, or a 8083 * negative errno if a local failure occurred. 8084 */ 8085int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 8086{ 8087 struct nfs_server *server = NFS_SERVER(inode); 8088 struct nfs_client *clp = server->nfs_client; 8089 const struct nfs4_mig_recovery_ops *ops = 8090 clp->cl_mvops->mig_recovery_ops; 8091 struct nfs4_exception exception = { 8092 .interruptible = true, 8093 }; 8094 int status; 8095 8096 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8097 (unsigned long long)server->fsid.major, 8098 (unsigned long long)server->fsid.minor, 8099 clp->cl_hostname); 8100 nfs_display_fhandle(NFS_FH(inode), __func__); 8101 8102 do { 8103 status = ops->fsid_present(inode, cred); 8104 if (status != -NFS4ERR_DELAY) 8105 break; 8106 nfs4_handle_exception(server, status, &exception); 8107 } while (exception.retry); 8108 return status; 8109} 8110 8111/* 8112 * If 'use_integrity' is true and the state managment nfs_client 8113 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 8114 * and the machine credential as per RFC3530bis and RFC5661 Security 8115 * Considerations sections. Otherwise, just use the user cred with the 8116 * filesystem's rpc_client. 8117 */ 8118static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8119{ 8120 int status; 8121 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 8122 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; 8123 struct nfs4_secinfo_arg args = { 8124 .dir_fh = NFS_FH(dir), 8125 .name = name, 8126 }; 8127 struct nfs4_secinfo_res res = { 8128 .flavors = flavors, 8129 }; 8130 struct rpc_message msg = { 8131 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 8132 .rpc_argp = &args, 8133 .rpc_resp = &res, 8134 }; 8135 struct nfs4_call_sync_data data = { 8136 .seq_server = NFS_SERVER(dir), 8137 .seq_args = &args.seq_args, 8138 .seq_res = &res.seq_res, 8139 }; 8140 struct rpc_task_setup task_setup = { 8141 .rpc_client = clnt, 8142 .rpc_message = &msg, 8143 .callback_ops = clp->cl_mvops->call_sync_ops, 8144 .callback_data = &data, 8145 .flags = RPC_TASK_NO_ROUND_ROBIN, 8146 }; 8147 const struct cred *cred = NULL; 8148 8149 if (use_integrity) { 8150 clnt = clp->cl_rpcclient; 8151 task_setup.rpc_client = clnt; 8152 8153 cred = nfs4_get_clid_cred(clp); 8154 msg.rpc_cred = cred; 8155 } 8156 8157 dprintk("NFS call secinfo %s\n", name->name); 8158 8159 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 8160 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 8161 status = nfs4_call_sync_custom(&task_setup); 8162 8163 dprintk("NFS reply secinfo: %d\n", status); 8164 8165 put_cred(cred); 8166 return status; 8167} 8168 8169int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 8170 struct nfs4_secinfo_flavors *flavors) 8171{ 8172 struct nfs4_exception exception = { 8173 .interruptible = true, 8174 }; 8175 int err; 8176 do { 8177 err = -NFS4ERR_WRONGSEC; 8178 8179 /* try to use integrity protection with machine cred */ 8180 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 8181 err = _nfs4_proc_secinfo(dir, name, flavors, true); 8182 8183 /* 8184 * if unable to use integrity protection, or SECINFO with 8185 * integrity protection returns NFS4ERR_WRONGSEC (which is 8186 * disallowed by spec, but exists in deployed servers) use 8187 * the current filesystem's rpc_client and the user cred. 8188 */ 8189 if (err == -NFS4ERR_WRONGSEC) 8190 err = _nfs4_proc_secinfo(dir, name, flavors, false); 8191 8192 trace_nfs4_secinfo(dir, name, err); 8193 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8194 &exception); 8195 } while (exception.retry); 8196 return err; 8197} 8198 8199#ifdef CONFIG_NFS_V4_1 8200/* 8201 * Check the exchange flags returned by the server for invalid flags, having 8202 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 8203 * DS flags set. 8204 */ 8205static int nfs4_check_cl_exchange_flags(u32 flags, u32 version) 8206{ 8207 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R)) 8208 goto out_inval; 8209 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R)) 8210 goto out_inval; 8211 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 8212 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 8213 goto out_inval; 8214 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 8215 goto out_inval; 8216 return NFS_OK; 8217out_inval: 8218 return -NFS4ERR_INVAL; 8219} 8220 8221static bool 8222nfs41_same_server_scope(struct nfs41_server_scope *a, 8223 struct nfs41_server_scope *b) 8224{ 8225 if (a->server_scope_sz != b->server_scope_sz) 8226 return false; 8227 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 8228} 8229 8230static void 8231nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 8232{ 8233 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; 8234 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp; 8235 struct nfs_client *clp = args->client; 8236 8237 switch (task->tk_status) { 8238 case -NFS4ERR_BADSESSION: 8239 case -NFS4ERR_DEADSESSION: 8240 nfs4_schedule_session_recovery(clp->cl_session, 8241 task->tk_status); 8242 return; 8243 } 8244 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH && 8245 res->dir != NFS4_CDFS4_BOTH) { 8246 rpc_task_close_connection(task); 8247 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES) 8248 rpc_restart_call(task); 8249 } 8250} 8251 8252static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 8253 .rpc_call_done = nfs4_bind_one_conn_to_session_done, 8254}; 8255 8256/* 8257 * nfs4_proc_bind_one_conn_to_session() 8258 * 8259 * The 4.1 client currently uses the same TCP connection for the 8260 * fore and backchannel. 8261 */ 8262static 8263int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 8264 struct rpc_xprt *xprt, 8265 struct nfs_client *clp, 8266 const struct cred *cred) 8267{ 8268 int status; 8269 struct nfs41_bind_conn_to_session_args args = { 8270 .client = clp, 8271 .dir = NFS4_CDFC4_FORE_OR_BOTH, 8272 .retries = 0, 8273 }; 8274 struct nfs41_bind_conn_to_session_res res; 8275 struct rpc_message msg = { 8276 .rpc_proc = 8277 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 8278 .rpc_argp = &args, 8279 .rpc_resp = &res, 8280 .rpc_cred = cred, 8281 }; 8282 struct rpc_task_setup task_setup_data = { 8283 .rpc_client = clnt, 8284 .rpc_xprt = xprt, 8285 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 8286 .rpc_message = &msg, 8287 .flags = RPC_TASK_TIMEOUT, 8288 }; 8289 struct rpc_task *task; 8290 8291 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 8292 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 8293 args.dir = NFS4_CDFC4_FORE; 8294 8295 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 8296 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 8297 args.dir = NFS4_CDFC4_FORE; 8298 8299 task = rpc_run_task(&task_setup_data); 8300 if (!IS_ERR(task)) { 8301 status = task->tk_status; 8302 rpc_put_task(task); 8303 } else 8304 status = PTR_ERR(task); 8305 trace_nfs4_bind_conn_to_session(clp, status); 8306 if (status == 0) { 8307 if (memcmp(res.sessionid.data, 8308 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 8309 dprintk("NFS: %s: Session ID mismatch\n", __func__); 8310 return -EIO; 8311 } 8312 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 8313 dprintk("NFS: %s: Unexpected direction from server\n", 8314 __func__); 8315 return -EIO; 8316 } 8317 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 8318 dprintk("NFS: %s: Server returned RDMA mode = true\n", 8319 __func__); 8320 return -EIO; 8321 } 8322 } 8323 8324 return status; 8325} 8326 8327struct rpc_bind_conn_calldata { 8328 struct nfs_client *clp; 8329 const struct cred *cred; 8330}; 8331 8332static int 8333nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 8334 struct rpc_xprt *xprt, 8335 void *calldata) 8336{ 8337 struct rpc_bind_conn_calldata *p = calldata; 8338 8339 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 8340} 8341 8342int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 8343{ 8344 struct rpc_bind_conn_calldata data = { 8345 .clp = clp, 8346 .cred = cred, 8347 }; 8348 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 8349 nfs4_proc_bind_conn_to_session_callback, &data); 8350} 8351 8352/* 8353 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 8354 * and operations we'd like to see to enable certain features in the allow map 8355 */ 8356static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 8357 .how = SP4_MACH_CRED, 8358 .enforce.u.words = { 8359 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8360 1 << (OP_EXCHANGE_ID - 32) | 8361 1 << (OP_CREATE_SESSION - 32) | 8362 1 << (OP_DESTROY_SESSION - 32) | 8363 1 << (OP_DESTROY_CLIENTID - 32) 8364 }, 8365 .allow.u.words = { 8366 [0] = 1 << (OP_CLOSE) | 8367 1 << (OP_OPEN_DOWNGRADE) | 8368 1 << (OP_LOCKU) | 8369 1 << (OP_DELEGRETURN) | 8370 1 << (OP_COMMIT), 8371 [1] = 1 << (OP_SECINFO - 32) | 8372 1 << (OP_SECINFO_NO_NAME - 32) | 8373 1 << (OP_LAYOUTRETURN - 32) | 8374 1 << (OP_TEST_STATEID - 32) | 8375 1 << (OP_FREE_STATEID - 32) | 8376 1 << (OP_WRITE - 32) 8377 } 8378}; 8379 8380/* 8381 * Select the state protection mode for client `clp' given the server results 8382 * from exchange_id in `sp'. 8383 * 8384 * Returns 0 on success, negative errno otherwise. 8385 */ 8386static int nfs4_sp4_select_mode(struct nfs_client *clp, 8387 struct nfs41_state_protection *sp) 8388{ 8389 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 8390 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8391 1 << (OP_EXCHANGE_ID - 32) | 8392 1 << (OP_CREATE_SESSION - 32) | 8393 1 << (OP_DESTROY_SESSION - 32) | 8394 1 << (OP_DESTROY_CLIENTID - 32) 8395 }; 8396 unsigned long flags = 0; 8397 unsigned int i; 8398 int ret = 0; 8399 8400 if (sp->how == SP4_MACH_CRED) { 8401 /* Print state protect result */ 8402 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 8403 for (i = 0; i <= LAST_NFS4_OP; i++) { 8404 if (test_bit(i, sp->enforce.u.longs)) 8405 dfprintk(MOUNT, " enforce op %d\n", i); 8406 if (test_bit(i, sp->allow.u.longs)) 8407 dfprintk(MOUNT, " allow op %d\n", i); 8408 } 8409 8410 /* make sure nothing is on enforce list that isn't supported */ 8411 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 8412 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 8413 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8414 ret = -EINVAL; 8415 goto out; 8416 } 8417 } 8418 8419 /* 8420 * Minimal mode - state operations are allowed to use machine 8421 * credential. Note this already happens by default, so the 8422 * client doesn't have to do anything more than the negotiation. 8423 * 8424 * NOTE: we don't care if EXCHANGE_ID is in the list - 8425 * we're already using the machine cred for exchange_id 8426 * and will never use a different cred. 8427 */ 8428 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 8429 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 8430 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 8431 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 8432 dfprintk(MOUNT, "sp4_mach_cred:\n"); 8433 dfprintk(MOUNT, " minimal mode enabled\n"); 8434 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 8435 } else { 8436 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8437 ret = -EINVAL; 8438 goto out; 8439 } 8440 8441 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 8442 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 8443 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 8444 test_bit(OP_LOCKU, sp->allow.u.longs)) { 8445 dfprintk(MOUNT, " cleanup mode enabled\n"); 8446 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 8447 } 8448 8449 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 8450 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 8451 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 8452 } 8453 8454 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 8455 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 8456 dfprintk(MOUNT, " secinfo mode enabled\n"); 8457 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 8458 } 8459 8460 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 8461 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 8462 dfprintk(MOUNT, " stateid mode enabled\n"); 8463 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 8464 } 8465 8466 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 8467 dfprintk(MOUNT, " write mode enabled\n"); 8468 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 8469 } 8470 8471 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 8472 dfprintk(MOUNT, " commit mode enabled\n"); 8473 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 8474 } 8475 } 8476out: 8477 clp->cl_sp4_flags = flags; 8478 return ret; 8479} 8480 8481struct nfs41_exchange_id_data { 8482 struct nfs41_exchange_id_res res; 8483 struct nfs41_exchange_id_args args; 8484}; 8485 8486static void nfs4_exchange_id_release(void *data) 8487{ 8488 struct nfs41_exchange_id_data *cdata = 8489 (struct nfs41_exchange_id_data *)data; 8490 8491 nfs_put_client(cdata->args.client); 8492 kfree(cdata->res.impl_id); 8493 kfree(cdata->res.server_scope); 8494 kfree(cdata->res.server_owner); 8495 kfree(cdata); 8496} 8497 8498static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 8499 .rpc_release = nfs4_exchange_id_release, 8500}; 8501 8502/* 8503 * _nfs4_proc_exchange_id() 8504 * 8505 * Wrapper for EXCHANGE_ID operation. 8506 */ 8507static struct rpc_task * 8508nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8509 u32 sp4_how, struct rpc_xprt *xprt) 8510{ 8511 struct rpc_message msg = { 8512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8513 .rpc_cred = cred, 8514 }; 8515 struct rpc_task_setup task_setup_data = { 8516 .rpc_client = clp->cl_rpcclient, 8517 .callback_ops = &nfs4_exchange_id_call_ops, 8518 .rpc_message = &msg, 8519 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8520 }; 8521 struct nfs41_exchange_id_data *calldata; 8522 int status; 8523 8524 if (!refcount_inc_not_zero(&clp->cl_count)) 8525 return ERR_PTR(-EIO); 8526 8527 status = -ENOMEM; 8528 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8529 if (!calldata) 8530 goto out; 8531 8532 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8533 8534 status = nfs4_init_uniform_client_string(clp); 8535 if (status) 8536 goto out_calldata; 8537 8538 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8539 GFP_NOFS); 8540 status = -ENOMEM; 8541 if (unlikely(calldata->res.server_owner == NULL)) 8542 goto out_calldata; 8543 8544 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8545 GFP_NOFS); 8546 if (unlikely(calldata->res.server_scope == NULL)) 8547 goto out_server_owner; 8548 8549 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8550 if (unlikely(calldata->res.impl_id == NULL)) 8551 goto out_server_scope; 8552 8553 switch (sp4_how) { 8554 case SP4_NONE: 8555 calldata->args.state_protect.how = SP4_NONE; 8556 break; 8557 8558 case SP4_MACH_CRED: 8559 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8560 break; 8561 8562 default: 8563 /* unsupported! */ 8564 WARN_ON_ONCE(1); 8565 status = -EINVAL; 8566 goto out_impl_id; 8567 } 8568 if (xprt) { 8569 task_setup_data.rpc_xprt = xprt; 8570 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8571 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8572 sizeof(calldata->args.verifier.data)); 8573 } 8574 calldata->args.client = clp; 8575 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8576 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8577#ifdef CONFIG_NFS_V4_1_MIGRATION 8578 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8579#endif 8580 msg.rpc_argp = &calldata->args; 8581 msg.rpc_resp = &calldata->res; 8582 task_setup_data.callback_data = calldata; 8583 8584 return rpc_run_task(&task_setup_data); 8585 8586out_impl_id: 8587 kfree(calldata->res.impl_id); 8588out_server_scope: 8589 kfree(calldata->res.server_scope); 8590out_server_owner: 8591 kfree(calldata->res.server_owner); 8592out_calldata: 8593 kfree(calldata); 8594out: 8595 nfs_put_client(clp); 8596 return ERR_PTR(status); 8597} 8598 8599/* 8600 * _nfs4_proc_exchange_id() 8601 * 8602 * Wrapper for EXCHANGE_ID operation. 8603 */ 8604static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 8605 u32 sp4_how) 8606{ 8607 struct rpc_task *task; 8608 struct nfs41_exchange_id_args *argp; 8609 struct nfs41_exchange_id_res *resp; 8610 unsigned long now = jiffies; 8611 int status; 8612 8613 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 8614 if (IS_ERR(task)) 8615 return PTR_ERR(task); 8616 8617 argp = task->tk_msg.rpc_argp; 8618 resp = task->tk_msg.rpc_resp; 8619 status = task->tk_status; 8620 if (status != 0) 8621 goto out; 8622 8623 status = nfs4_check_cl_exchange_flags(resp->flags, 8624 clp->cl_mvops->minor_version); 8625 if (status != 0) 8626 goto out; 8627 8628 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 8629 if (status != 0) 8630 goto out; 8631 8632 do_renew_lease(clp, now); 8633 8634 clp->cl_clientid = resp->clientid; 8635 clp->cl_exchange_flags = resp->flags; 8636 clp->cl_seqid = resp->seqid; 8637 /* Client ID is not confirmed */ 8638 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 8639 clear_bit(NFS4_SESSION_ESTABLISHED, 8640 &clp->cl_session->session_state); 8641 8642 if (clp->cl_serverscope != NULL && 8643 !nfs41_same_server_scope(clp->cl_serverscope, 8644 resp->server_scope)) { 8645 dprintk("%s: server_scope mismatch detected\n", 8646 __func__); 8647 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 8648 } 8649 8650 swap(clp->cl_serverowner, resp->server_owner); 8651 swap(clp->cl_serverscope, resp->server_scope); 8652 swap(clp->cl_implid, resp->impl_id); 8653 8654 /* Save the EXCHANGE_ID verifier session trunk tests */ 8655 memcpy(clp->cl_confirm.data, argp->verifier.data, 8656 sizeof(clp->cl_confirm.data)); 8657out: 8658 trace_nfs4_exchange_id(clp, status); 8659 rpc_put_task(task); 8660 return status; 8661} 8662 8663/* 8664 * nfs4_proc_exchange_id() 8665 * 8666 * Returns zero, a negative errno, or a negative NFS4ERR status code. 8667 * 8668 * Since the clientid has expired, all compounds using sessions 8669 * associated with the stale clientid will be returning 8670 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 8671 * be in some phase of session reset. 8672 * 8673 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 8674 */ 8675int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 8676{ 8677 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 8678 int status; 8679 8680 /* try SP4_MACH_CRED if krb5i/p */ 8681 if (authflavor == RPC_AUTH_GSS_KRB5I || 8682 authflavor == RPC_AUTH_GSS_KRB5P) { 8683 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 8684 if (!status) 8685 return 0; 8686 } 8687 8688 /* try SP4_NONE */ 8689 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 8690} 8691 8692/** 8693 * nfs4_test_session_trunk 8694 * 8695 * This is an add_xprt_test() test function called from 8696 * rpc_clnt_setup_test_and_add_xprt. 8697 * 8698 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 8699 * and is dereferrenced in nfs4_exchange_id_release 8700 * 8701 * Upon success, add the new transport to the rpc_clnt 8702 * 8703 * @clnt: struct rpc_clnt to get new transport 8704 * @xprt: the rpc_xprt to test 8705 * @data: call data for _nfs4_proc_exchange_id. 8706 */ 8707void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 8708 void *data) 8709{ 8710 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data; 8711 struct rpc_task *task; 8712 int status; 8713 8714 u32 sp4_how; 8715 8716 dprintk("--> %s try %s\n", __func__, 8717 xprt->address_strings[RPC_DISPLAY_ADDR]); 8718 8719 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 8720 8721 /* Test connection for session trunking. Async exchange_id call */ 8722 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 8723 if (IS_ERR(task)) 8724 return; 8725 8726 status = task->tk_status; 8727 if (status == 0) 8728 status = nfs4_detect_session_trunking(adata->clp, 8729 task->tk_msg.rpc_resp, xprt); 8730 8731 if (status == 0) 8732 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 8733 8734 rpc_put_task(task); 8735} 8736EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 8737 8738static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 8739 const struct cred *cred) 8740{ 8741 struct rpc_message msg = { 8742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 8743 .rpc_argp = clp, 8744 .rpc_cred = cred, 8745 }; 8746 int status; 8747 8748 status = rpc_call_sync(clp->cl_rpcclient, &msg, 8749 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8750 trace_nfs4_destroy_clientid(clp, status); 8751 if (status) 8752 dprintk("NFS: Got error %d from the server %s on " 8753 "DESTROY_CLIENTID.", status, clp->cl_hostname); 8754 return status; 8755} 8756 8757static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 8758 const struct cred *cred) 8759{ 8760 unsigned int loop; 8761 int ret; 8762 8763 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 8764 ret = _nfs4_proc_destroy_clientid(clp, cred); 8765 switch (ret) { 8766 case -NFS4ERR_DELAY: 8767 case -NFS4ERR_CLIENTID_BUSY: 8768 ssleep(1); 8769 break; 8770 default: 8771 return ret; 8772 } 8773 } 8774 return 0; 8775} 8776 8777int nfs4_destroy_clientid(struct nfs_client *clp) 8778{ 8779 const struct cred *cred; 8780 int ret = 0; 8781 8782 if (clp->cl_mvops->minor_version < 1) 8783 goto out; 8784 if (clp->cl_exchange_flags == 0) 8785 goto out; 8786 if (clp->cl_preserve_clid) 8787 goto out; 8788 cred = nfs4_get_clid_cred(clp); 8789 ret = nfs4_proc_destroy_clientid(clp, cred); 8790 put_cred(cred); 8791 switch (ret) { 8792 case 0: 8793 case -NFS4ERR_STALE_CLIENTID: 8794 clp->cl_exchange_flags = 0; 8795 } 8796out: 8797 return ret; 8798} 8799 8800#endif /* CONFIG_NFS_V4_1 */ 8801 8802struct nfs4_get_lease_time_data { 8803 struct nfs4_get_lease_time_args *args; 8804 struct nfs4_get_lease_time_res *res; 8805 struct nfs_client *clp; 8806}; 8807 8808static void nfs4_get_lease_time_prepare(struct rpc_task *task, 8809 void *calldata) 8810{ 8811 struct nfs4_get_lease_time_data *data = 8812 (struct nfs4_get_lease_time_data *)calldata; 8813 8814 dprintk("--> %s\n", __func__); 8815 /* just setup sequence, do not trigger session recovery 8816 since we're invoked within one */ 8817 nfs4_setup_sequence(data->clp, 8818 &data->args->la_seq_args, 8819 &data->res->lr_seq_res, 8820 task); 8821 dprintk("<-- %s\n", __func__); 8822} 8823 8824/* 8825 * Called from nfs4_state_manager thread for session setup, so don't recover 8826 * from sequence operation or clientid errors. 8827 */ 8828static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 8829{ 8830 struct nfs4_get_lease_time_data *data = 8831 (struct nfs4_get_lease_time_data *)calldata; 8832 8833 dprintk("--> %s\n", __func__); 8834 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 8835 return; 8836 switch (task->tk_status) { 8837 case -NFS4ERR_DELAY: 8838 case -NFS4ERR_GRACE: 8839 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 8840 rpc_delay(task, NFS4_POLL_RETRY_MIN); 8841 task->tk_status = 0; 8842 fallthrough; 8843 case -NFS4ERR_RETRY_UNCACHED_REP: 8844 rpc_restart_call_prepare(task); 8845 return; 8846 } 8847 dprintk("<-- %s\n", __func__); 8848} 8849 8850static const struct rpc_call_ops nfs4_get_lease_time_ops = { 8851 .rpc_call_prepare = nfs4_get_lease_time_prepare, 8852 .rpc_call_done = nfs4_get_lease_time_done, 8853}; 8854 8855int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 8856{ 8857 struct nfs4_get_lease_time_args args; 8858 struct nfs4_get_lease_time_res res = { 8859 .lr_fsinfo = fsinfo, 8860 }; 8861 struct nfs4_get_lease_time_data data = { 8862 .args = &args, 8863 .res = &res, 8864 .clp = clp, 8865 }; 8866 struct rpc_message msg = { 8867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 8868 .rpc_argp = &args, 8869 .rpc_resp = &res, 8870 }; 8871 struct rpc_task_setup task_setup = { 8872 .rpc_client = clp->cl_rpcclient, 8873 .rpc_message = &msg, 8874 .callback_ops = &nfs4_get_lease_time_ops, 8875 .callback_data = &data, 8876 .flags = RPC_TASK_TIMEOUT, 8877 }; 8878 8879 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 8880 return nfs4_call_sync_custom(&task_setup); 8881} 8882 8883#ifdef CONFIG_NFS_V4_1 8884 8885/* 8886 * Initialize the values to be used by the client in CREATE_SESSION 8887 * If nfs4_init_session set the fore channel request and response sizes, 8888 * use them. 8889 * 8890 * Set the back channel max_resp_sz_cached to zero to force the client to 8891 * always set csa_cachethis to FALSE because the current implementation 8892 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 8893 */ 8894static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 8895 struct rpc_clnt *clnt) 8896{ 8897 unsigned int max_rqst_sz, max_resp_sz; 8898 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 8899 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 8900 8901 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 8902 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 8903 8904 /* Fore channel attributes */ 8905 args->fc_attrs.max_rqst_sz = max_rqst_sz; 8906 args->fc_attrs.max_resp_sz = max_resp_sz; 8907 args->fc_attrs.max_ops = NFS4_MAX_OPS; 8908 args->fc_attrs.max_reqs = max_session_slots; 8909 8910 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 8911 "max_ops=%u max_reqs=%u\n", 8912 __func__, 8913 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 8914 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 8915 8916 /* Back channel attributes */ 8917 args->bc_attrs.max_rqst_sz = max_bc_payload; 8918 args->bc_attrs.max_resp_sz = max_bc_payload; 8919 args->bc_attrs.max_resp_sz_cached = 0; 8920 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 8921 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 8922 if (args->bc_attrs.max_reqs > max_bc_slots) 8923 args->bc_attrs.max_reqs = max_bc_slots; 8924 8925 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 8926 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 8927 __func__, 8928 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 8929 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 8930 args->bc_attrs.max_reqs); 8931} 8932 8933static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 8934 struct nfs41_create_session_res *res) 8935{ 8936 struct nfs4_channel_attrs *sent = &args->fc_attrs; 8937 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 8938 8939 if (rcvd->max_resp_sz > sent->max_resp_sz) 8940 return -EINVAL; 8941 /* 8942 * Our requested max_ops is the minimum we need; we're not 8943 * prepared to break up compounds into smaller pieces than that. 8944 * So, no point even trying to continue if the server won't 8945 * cooperate: 8946 */ 8947 if (rcvd->max_ops < sent->max_ops) 8948 return -EINVAL; 8949 if (rcvd->max_reqs == 0) 8950 return -EINVAL; 8951 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 8952 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 8953 return 0; 8954} 8955 8956static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 8957 struct nfs41_create_session_res *res) 8958{ 8959 struct nfs4_channel_attrs *sent = &args->bc_attrs; 8960 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 8961 8962 if (!(res->flags & SESSION4_BACK_CHAN)) 8963 goto out; 8964 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 8965 return -EINVAL; 8966 if (rcvd->max_resp_sz < sent->max_resp_sz) 8967 return -EINVAL; 8968 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 8969 return -EINVAL; 8970 if (rcvd->max_ops > sent->max_ops) 8971 return -EINVAL; 8972 if (rcvd->max_reqs > sent->max_reqs) 8973 return -EINVAL; 8974out: 8975 return 0; 8976} 8977 8978static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 8979 struct nfs41_create_session_res *res) 8980{ 8981 int ret; 8982 8983 ret = nfs4_verify_fore_channel_attrs(args, res); 8984 if (ret) 8985 return ret; 8986 return nfs4_verify_back_channel_attrs(args, res); 8987} 8988 8989static void nfs4_update_session(struct nfs4_session *session, 8990 struct nfs41_create_session_res *res) 8991{ 8992 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 8993 /* Mark client id and session as being confirmed */ 8994 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 8995 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 8996 session->flags = res->flags; 8997 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 8998 if (res->flags & SESSION4_BACK_CHAN) 8999 memcpy(&session->bc_attrs, &res->bc_attrs, 9000 sizeof(session->bc_attrs)); 9001} 9002 9003static int _nfs4_proc_create_session(struct nfs_client *clp, 9004 const struct cred *cred) 9005{ 9006 struct nfs4_session *session = clp->cl_session; 9007 struct nfs41_create_session_args args = { 9008 .client = clp, 9009 .clientid = clp->cl_clientid, 9010 .seqid = clp->cl_seqid, 9011 .cb_program = NFS4_CALLBACK, 9012 }; 9013 struct nfs41_create_session_res res; 9014 9015 struct rpc_message msg = { 9016 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 9017 .rpc_argp = &args, 9018 .rpc_resp = &res, 9019 .rpc_cred = cred, 9020 }; 9021 int status; 9022 9023 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 9024 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 9025 9026 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9027 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9028 trace_nfs4_create_session(clp, status); 9029 9030 switch (status) { 9031 case -NFS4ERR_STALE_CLIENTID: 9032 case -NFS4ERR_DELAY: 9033 case -ETIMEDOUT: 9034 case -EACCES: 9035 case -EAGAIN: 9036 goto out; 9037 } 9038 9039 clp->cl_seqid++; 9040 if (!status) { 9041 /* Verify the session's negotiated channel_attrs values */ 9042 status = nfs4_verify_channel_attrs(&args, &res); 9043 /* Increment the clientid slot sequence id */ 9044 if (status) 9045 goto out; 9046 nfs4_update_session(session, &res); 9047 } 9048out: 9049 return status; 9050} 9051 9052/* 9053 * Issues a CREATE_SESSION operation to the server. 9054 * It is the responsibility of the caller to verify the session is 9055 * expired before calling this routine. 9056 */ 9057int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 9058{ 9059 int status; 9060 unsigned *ptr; 9061 struct nfs4_session *session = clp->cl_session; 9062 9063 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 9064 9065 status = _nfs4_proc_create_session(clp, cred); 9066 if (status) 9067 goto out; 9068 9069 /* Init or reset the session slot tables */ 9070 status = nfs4_setup_session_slot_tables(session); 9071 dprintk("slot table setup returned %d\n", status); 9072 if (status) 9073 goto out; 9074 9075 ptr = (unsigned *)&session->sess_id.data[0]; 9076 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 9077 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 9078out: 9079 dprintk("<-- %s\n", __func__); 9080 return status; 9081} 9082 9083/* 9084 * Issue the over-the-wire RPC DESTROY_SESSION. 9085 * The caller must serialize access to this routine. 9086 */ 9087int nfs4_proc_destroy_session(struct nfs4_session *session, 9088 const struct cred *cred) 9089{ 9090 struct rpc_message msg = { 9091 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 9092 .rpc_argp = session, 9093 .rpc_cred = cred, 9094 }; 9095 int status = 0; 9096 9097 dprintk("--> nfs4_proc_destroy_session\n"); 9098 9099 /* session is still being setup */ 9100 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 9101 return 0; 9102 9103 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9104 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9105 trace_nfs4_destroy_session(session->clp, status); 9106 9107 if (status) 9108 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 9109 "Session has been destroyed regardless...\n", status); 9110 9111 dprintk("<-- nfs4_proc_destroy_session\n"); 9112 return status; 9113} 9114 9115/* 9116 * Renew the cl_session lease. 9117 */ 9118struct nfs4_sequence_data { 9119 struct nfs_client *clp; 9120 struct nfs4_sequence_args args; 9121 struct nfs4_sequence_res res; 9122}; 9123 9124static void nfs41_sequence_release(void *data) 9125{ 9126 struct nfs4_sequence_data *calldata = data; 9127 struct nfs_client *clp = calldata->clp; 9128 9129 if (refcount_read(&clp->cl_count) > 1) 9130 nfs4_schedule_state_renewal(clp); 9131 nfs_put_client(clp); 9132 kfree(calldata); 9133} 9134 9135static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9136{ 9137 switch(task->tk_status) { 9138 case -NFS4ERR_DELAY: 9139 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9140 return -EAGAIN; 9141 default: 9142 nfs4_schedule_lease_recovery(clp); 9143 } 9144 return 0; 9145} 9146 9147static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 9148{ 9149 struct nfs4_sequence_data *calldata = data; 9150 struct nfs_client *clp = calldata->clp; 9151 9152 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 9153 return; 9154 9155 trace_nfs4_sequence(clp, task->tk_status); 9156 if (task->tk_status < 0) { 9157 dprintk("%s ERROR %d\n", __func__, task->tk_status); 9158 if (refcount_read(&clp->cl_count) == 1) 9159 goto out; 9160 9161 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 9162 rpc_restart_call_prepare(task); 9163 return; 9164 } 9165 } 9166 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 9167out: 9168 dprintk("<-- %s\n", __func__); 9169} 9170 9171static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 9172{ 9173 struct nfs4_sequence_data *calldata = data; 9174 struct nfs_client *clp = calldata->clp; 9175 struct nfs4_sequence_args *args; 9176 struct nfs4_sequence_res *res; 9177 9178 args = task->tk_msg.rpc_argp; 9179 res = task->tk_msg.rpc_resp; 9180 9181 nfs4_setup_sequence(clp, args, res, task); 9182} 9183 9184static const struct rpc_call_ops nfs41_sequence_ops = { 9185 .rpc_call_done = nfs41_sequence_call_done, 9186 .rpc_call_prepare = nfs41_sequence_prepare, 9187 .rpc_release = nfs41_sequence_release, 9188}; 9189 9190static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 9191 const struct cred *cred, 9192 struct nfs4_slot *slot, 9193 bool is_privileged) 9194{ 9195 struct nfs4_sequence_data *calldata; 9196 struct rpc_message msg = { 9197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 9198 .rpc_cred = cred, 9199 }; 9200 struct rpc_task_setup task_setup_data = { 9201 .rpc_client = clp->cl_rpcclient, 9202 .rpc_message = &msg, 9203 .callback_ops = &nfs41_sequence_ops, 9204 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 9205 }; 9206 struct rpc_task *ret; 9207 9208 ret = ERR_PTR(-EIO); 9209 if (!refcount_inc_not_zero(&clp->cl_count)) 9210 goto out_err; 9211 9212 ret = ERR_PTR(-ENOMEM); 9213 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9214 if (calldata == NULL) 9215 goto out_put_clp; 9216 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 9217 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 9218 msg.rpc_argp = &calldata->args; 9219 msg.rpc_resp = &calldata->res; 9220 calldata->clp = clp; 9221 task_setup_data.callback_data = calldata; 9222 9223 ret = rpc_run_task(&task_setup_data); 9224 if (IS_ERR(ret)) 9225 goto out_err; 9226 return ret; 9227out_put_clp: 9228 nfs_put_client(clp); 9229out_err: 9230 nfs41_release_slot(slot); 9231 return ret; 9232} 9233 9234static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 9235{ 9236 struct rpc_task *task; 9237 int ret = 0; 9238 9239 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 9240 return -EAGAIN; 9241 task = _nfs41_proc_sequence(clp, cred, NULL, false); 9242 if (IS_ERR(task)) 9243 ret = PTR_ERR(task); 9244 else 9245 rpc_put_task_async(task); 9246 dprintk("<-- %s status=%d\n", __func__, ret); 9247 return ret; 9248} 9249 9250static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 9251{ 9252 struct rpc_task *task; 9253 int ret; 9254 9255 task = _nfs41_proc_sequence(clp, cred, NULL, true); 9256 if (IS_ERR(task)) { 9257 ret = PTR_ERR(task); 9258 goto out; 9259 } 9260 ret = rpc_wait_for_completion_task(task); 9261 if (!ret) 9262 ret = task->tk_status; 9263 rpc_put_task(task); 9264out: 9265 dprintk("<-- %s status=%d\n", __func__, ret); 9266 return ret; 9267} 9268 9269struct nfs4_reclaim_complete_data { 9270 struct nfs_client *clp; 9271 struct nfs41_reclaim_complete_args arg; 9272 struct nfs41_reclaim_complete_res res; 9273}; 9274 9275static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 9276{ 9277 struct nfs4_reclaim_complete_data *calldata = data; 9278 9279 nfs4_setup_sequence(calldata->clp, 9280 &calldata->arg.seq_args, 9281 &calldata->res.seq_res, 9282 task); 9283} 9284 9285static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9286{ 9287 switch(task->tk_status) { 9288 case 0: 9289 wake_up_all(&clp->cl_lock_waitq); 9290 fallthrough; 9291 case -NFS4ERR_COMPLETE_ALREADY: 9292 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 9293 break; 9294 case -NFS4ERR_DELAY: 9295 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9296 fallthrough; 9297 case -NFS4ERR_RETRY_UNCACHED_REP: 9298 case -EACCES: 9299 dprintk("%s: failed to reclaim complete error %d for server %s, retrying\n", 9300 __func__, task->tk_status, clp->cl_hostname); 9301 return -EAGAIN; 9302 case -NFS4ERR_BADSESSION: 9303 case -NFS4ERR_DEADSESSION: 9304 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9305 break; 9306 default: 9307 nfs4_schedule_lease_recovery(clp); 9308 } 9309 return 0; 9310} 9311 9312static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 9313{ 9314 struct nfs4_reclaim_complete_data *calldata = data; 9315 struct nfs_client *clp = calldata->clp; 9316 struct nfs4_sequence_res *res = &calldata->res.seq_res; 9317 9318 dprintk("--> %s\n", __func__); 9319 if (!nfs41_sequence_done(task, res)) 9320 return; 9321 9322 trace_nfs4_reclaim_complete(clp, task->tk_status); 9323 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 9324 rpc_restart_call_prepare(task); 9325 return; 9326 } 9327 dprintk("<-- %s\n", __func__); 9328} 9329 9330static void nfs4_free_reclaim_complete_data(void *data) 9331{ 9332 struct nfs4_reclaim_complete_data *calldata = data; 9333 9334 kfree(calldata); 9335} 9336 9337static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 9338 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 9339 .rpc_call_done = nfs4_reclaim_complete_done, 9340 .rpc_release = nfs4_free_reclaim_complete_data, 9341}; 9342 9343/* 9344 * Issue a global reclaim complete. 9345 */ 9346static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 9347 const struct cred *cred) 9348{ 9349 struct nfs4_reclaim_complete_data *calldata; 9350 struct rpc_message msg = { 9351 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 9352 .rpc_cred = cred, 9353 }; 9354 struct rpc_task_setup task_setup_data = { 9355 .rpc_client = clp->cl_rpcclient, 9356 .rpc_message = &msg, 9357 .callback_ops = &nfs4_reclaim_complete_call_ops, 9358 .flags = RPC_TASK_NO_ROUND_ROBIN, 9359 }; 9360 int status = -ENOMEM; 9361 9362 dprintk("--> %s\n", __func__); 9363 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9364 if (calldata == NULL) 9365 goto out; 9366 calldata->clp = clp; 9367 calldata->arg.one_fs = 0; 9368 9369 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 9370 msg.rpc_argp = &calldata->arg; 9371 msg.rpc_resp = &calldata->res; 9372 task_setup_data.callback_data = calldata; 9373 status = nfs4_call_sync_custom(&task_setup_data); 9374out: 9375 dprintk("<-- %s status=%d\n", __func__, status); 9376 return status; 9377} 9378 9379static void 9380nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 9381{ 9382 struct nfs4_layoutget *lgp = calldata; 9383 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 9384 9385 dprintk("--> %s\n", __func__); 9386 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 9387 &lgp->res.seq_res, task); 9388 dprintk("<-- %s\n", __func__); 9389} 9390 9391static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 9392{ 9393 struct nfs4_layoutget *lgp = calldata; 9394 9395 dprintk("--> %s\n", __func__); 9396 nfs41_sequence_process(task, &lgp->res.seq_res); 9397 dprintk("<-- %s\n", __func__); 9398} 9399 9400static int 9401nfs4_layoutget_handle_exception(struct rpc_task *task, 9402 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 9403{ 9404 struct inode *inode = lgp->args.inode; 9405 struct nfs_server *server = NFS_SERVER(inode); 9406 struct pnfs_layout_hdr *lo; 9407 int nfs4err = task->tk_status; 9408 int err, status = 0; 9409 LIST_HEAD(head); 9410 9411 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 9412 9413 nfs4_sequence_free_slot(&lgp->res.seq_res); 9414 9415 switch (nfs4err) { 9416 case 0: 9417 goto out; 9418 9419 /* 9420 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 9421 * on the file. set tk_status to -ENODATA to tell upper layer to 9422 * retry go inband. 9423 */ 9424 case -NFS4ERR_LAYOUTUNAVAILABLE: 9425 status = -ENODATA; 9426 goto out; 9427 /* 9428 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 9429 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 9430 */ 9431 case -NFS4ERR_BADLAYOUT: 9432 status = -EOVERFLOW; 9433 goto out; 9434 /* 9435 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 9436 * (or clients) writing to the same RAID stripe except when 9437 * the minlength argument is 0 (see RFC5661 section 18.43.3). 9438 * 9439 * Treat it like we would RECALLCONFLICT -- we retry for a little 9440 * while, and then eventually give up. 9441 */ 9442 case -NFS4ERR_LAYOUTTRYLATER: 9443 if (lgp->args.minlength == 0) { 9444 status = -EOVERFLOW; 9445 goto out; 9446 } 9447 status = -EBUSY; 9448 break; 9449 case -NFS4ERR_RECALLCONFLICT: 9450 case -NFS4ERR_RETURNCONFLICT: 9451 status = -ERECALLCONFLICT; 9452 break; 9453 case -NFS4ERR_DELEG_REVOKED: 9454 case -NFS4ERR_ADMIN_REVOKED: 9455 case -NFS4ERR_EXPIRED: 9456 case -NFS4ERR_BAD_STATEID: 9457 exception->timeout = 0; 9458 spin_lock(&inode->i_lock); 9459 lo = NFS_I(inode)->layout; 9460 /* If the open stateid was bad, then recover it. */ 9461 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 9462 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 9463 spin_unlock(&inode->i_lock); 9464 exception->state = lgp->args.ctx->state; 9465 exception->stateid = &lgp->args.stateid; 9466 break; 9467 } 9468 9469 /* 9470 * Mark the bad layout state as invalid, then retry 9471 */ 9472 pnfs_mark_layout_stateid_invalid(lo, &head); 9473 spin_unlock(&inode->i_lock); 9474 nfs_commit_inode(inode, 0); 9475 pnfs_free_lseg_list(&head); 9476 status = -EAGAIN; 9477 goto out; 9478 } 9479 9480 err = nfs4_handle_exception(server, nfs4err, exception); 9481 if (!status) { 9482 if (exception->retry) 9483 status = -EAGAIN; 9484 else 9485 status = err; 9486 } 9487out: 9488 dprintk("<-- %s\n", __func__); 9489 return status; 9490} 9491 9492size_t max_response_pages(struct nfs_server *server) 9493{ 9494 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9495 return nfs_page_array_len(0, max_resp_sz); 9496} 9497 9498static void nfs4_layoutget_release(void *calldata) 9499{ 9500 struct nfs4_layoutget *lgp = calldata; 9501 9502 dprintk("--> %s\n", __func__); 9503 nfs4_sequence_free_slot(&lgp->res.seq_res); 9504 pnfs_layoutget_free(lgp); 9505 dprintk("<-- %s\n", __func__); 9506} 9507 9508static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9509 .rpc_call_prepare = nfs4_layoutget_prepare, 9510 .rpc_call_done = nfs4_layoutget_done, 9511 .rpc_release = nfs4_layoutget_release, 9512}; 9513 9514struct pnfs_layout_segment * 9515nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout) 9516{ 9517 struct inode *inode = lgp->args.inode; 9518 struct nfs_server *server = NFS_SERVER(inode); 9519 struct rpc_task *task; 9520 struct rpc_message msg = { 9521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9522 .rpc_argp = &lgp->args, 9523 .rpc_resp = &lgp->res, 9524 .rpc_cred = lgp->cred, 9525 }; 9526 struct rpc_task_setup task_setup_data = { 9527 .rpc_client = server->client, 9528 .rpc_message = &msg, 9529 .callback_ops = &nfs4_layoutget_call_ops, 9530 .callback_data = lgp, 9531 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 9532 }; 9533 struct pnfs_layout_segment *lseg = NULL; 9534 struct nfs4_exception exception = { 9535 .inode = inode, 9536 .timeout = *timeout, 9537 }; 9538 int status = 0; 9539 9540 dprintk("--> %s\n", __func__); 9541 9542 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ 9543 pnfs_get_layout_hdr(NFS_I(inode)->layout); 9544 9545 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9546 9547 task = rpc_run_task(&task_setup_data); 9548 9549 status = rpc_wait_for_completion_task(task); 9550 if (status != 0) 9551 goto out; 9552 9553 if (task->tk_status < 0) { 9554 status = nfs4_layoutget_handle_exception(task, lgp, &exception); 9555 *timeout = exception.timeout; 9556 } else if (lgp->res.layoutp->len == 0) { 9557 status = -EAGAIN; 9558 *timeout = nfs4_update_delay(&exception.timeout); 9559 } else 9560 lseg = pnfs_layout_process(lgp); 9561out: 9562 trace_nfs4_layoutget(lgp->args.ctx, 9563 &lgp->args.range, 9564 &lgp->res.range, 9565 &lgp->res.stateid, 9566 status); 9567 9568 rpc_put_task(task); 9569 dprintk("<-- %s status=%d\n", __func__, status); 9570 if (status) 9571 return ERR_PTR(status); 9572 return lseg; 9573} 9574 9575static void 9576nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9577{ 9578 struct nfs4_layoutreturn *lrp = calldata; 9579 9580 dprintk("--> %s\n", __func__); 9581 nfs4_setup_sequence(lrp->clp, 9582 &lrp->args.seq_args, 9583 &lrp->res.seq_res, 9584 task); 9585 if (!pnfs_layout_is_valid(lrp->args.layout)) 9586 rpc_exit(task, 0); 9587} 9588 9589static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9590{ 9591 struct nfs4_layoutreturn *lrp = calldata; 9592 struct nfs_server *server; 9593 9594 dprintk("--> %s\n", __func__); 9595 9596 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9597 return; 9598 9599 /* 9600 * Was there an RPC level error? Assume the call succeeded, 9601 * and that we need to release the layout 9602 */ 9603 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { 9604 lrp->res.lrs_present = 0; 9605 return; 9606 } 9607 9608 server = NFS_SERVER(lrp->args.inode); 9609 switch (task->tk_status) { 9610 case -NFS4ERR_OLD_STATEID: 9611 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, 9612 &lrp->args.range, 9613 lrp->args.inode)) 9614 goto out_restart; 9615 fallthrough; 9616 default: 9617 task->tk_status = 0; 9618 fallthrough; 9619 case 0: 9620 break; 9621 case -NFS4ERR_DELAY: 9622 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 9623 break; 9624 goto out_restart; 9625 } 9626 dprintk("<-- %s\n", __func__); 9627 return; 9628out_restart: 9629 task->tk_status = 0; 9630 nfs4_sequence_free_slot(&lrp->res.seq_res); 9631 rpc_restart_call_prepare(task); 9632} 9633 9634static void nfs4_layoutreturn_release(void *calldata) 9635{ 9636 struct nfs4_layoutreturn *lrp = calldata; 9637 struct pnfs_layout_hdr *lo = lrp->args.layout; 9638 9639 dprintk("--> %s\n", __func__); 9640 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, 9641 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 9642 nfs4_sequence_free_slot(&lrp->res.seq_res); 9643 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 9644 lrp->ld_private.ops->free(&lrp->ld_private); 9645 pnfs_put_layout_hdr(lrp->args.layout); 9646 nfs_iput_and_deactive(lrp->inode); 9647 put_cred(lrp->cred); 9648 kfree(calldata); 9649 dprintk("<-- %s\n", __func__); 9650} 9651 9652static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 9653 .rpc_call_prepare = nfs4_layoutreturn_prepare, 9654 .rpc_call_done = nfs4_layoutreturn_done, 9655 .rpc_release = nfs4_layoutreturn_release, 9656}; 9657 9658int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 9659{ 9660 struct rpc_task *task; 9661 struct rpc_message msg = { 9662 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 9663 .rpc_argp = &lrp->args, 9664 .rpc_resp = &lrp->res, 9665 .rpc_cred = lrp->cred, 9666 }; 9667 struct rpc_task_setup task_setup_data = { 9668 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 9669 .rpc_message = &msg, 9670 .callback_ops = &nfs4_layoutreturn_call_ops, 9671 .callback_data = lrp, 9672 }; 9673 int status = 0; 9674 9675 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 9676 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 9677 &task_setup_data.rpc_client, &msg); 9678 9679 dprintk("--> %s\n", __func__); 9680 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 9681 if (!sync) { 9682 if (!lrp->inode) { 9683 nfs4_layoutreturn_release(lrp); 9684 return -EAGAIN; 9685 } 9686 task_setup_data.flags |= RPC_TASK_ASYNC; 9687 } 9688 if (!lrp->inode) 9689 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9690 1); 9691 else 9692 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9693 0); 9694 task = rpc_run_task(&task_setup_data); 9695 if (IS_ERR(task)) 9696 return PTR_ERR(task); 9697 if (sync) 9698 status = task->tk_status; 9699 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 9700 dprintk("<-- %s status=%d\n", __func__, status); 9701 rpc_put_task(task); 9702 return status; 9703} 9704 9705static int 9706_nfs4_proc_getdeviceinfo(struct nfs_server *server, 9707 struct pnfs_device *pdev, 9708 const struct cred *cred) 9709{ 9710 struct nfs4_getdeviceinfo_args args = { 9711 .pdev = pdev, 9712 .notify_types = NOTIFY_DEVICEID4_CHANGE | 9713 NOTIFY_DEVICEID4_DELETE, 9714 }; 9715 struct nfs4_getdeviceinfo_res res = { 9716 .pdev = pdev, 9717 }; 9718 struct rpc_message msg = { 9719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 9720 .rpc_argp = &args, 9721 .rpc_resp = &res, 9722 .rpc_cred = cred, 9723 }; 9724 int status; 9725 9726 dprintk("--> %s\n", __func__); 9727 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 9728 if (res.notification & ~args.notify_types) 9729 dprintk("%s: unsupported notification\n", __func__); 9730 if (res.notification != args.notify_types) 9731 pdev->nocache = 1; 9732 9733 dprintk("<-- %s status=%d\n", __func__, status); 9734 9735 return status; 9736} 9737 9738int nfs4_proc_getdeviceinfo(struct nfs_server *server, 9739 struct pnfs_device *pdev, 9740 const struct cred *cred) 9741{ 9742 struct nfs4_exception exception = { }; 9743 int err; 9744 9745 do { 9746 err = nfs4_handle_exception(server, 9747 _nfs4_proc_getdeviceinfo(server, pdev, cred), 9748 &exception); 9749 } while (exception.retry); 9750 return err; 9751} 9752EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 9753 9754static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 9755{ 9756 struct nfs4_layoutcommit_data *data = calldata; 9757 struct nfs_server *server = NFS_SERVER(data->args.inode); 9758 9759 nfs4_setup_sequence(server->nfs_client, 9760 &data->args.seq_args, 9761 &data->res.seq_res, 9762 task); 9763} 9764 9765static void 9766nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 9767{ 9768 struct nfs4_layoutcommit_data *data = calldata; 9769 struct nfs_server *server = NFS_SERVER(data->args.inode); 9770 9771 if (!nfs41_sequence_done(task, &data->res.seq_res)) 9772 return; 9773 9774 switch (task->tk_status) { /* Just ignore these failures */ 9775 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 9776 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 9777 case -NFS4ERR_BADLAYOUT: /* no layout */ 9778 case -NFS4ERR_GRACE: /* loca_recalim always false */ 9779 task->tk_status = 0; 9780 case 0: 9781 break; 9782 default: 9783 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 9784 rpc_restart_call_prepare(task); 9785 return; 9786 } 9787 } 9788} 9789 9790static void nfs4_layoutcommit_release(void *calldata) 9791{ 9792 struct nfs4_layoutcommit_data *data = calldata; 9793 9794 pnfs_cleanup_layoutcommit(data); 9795 nfs_post_op_update_inode_force_wcc(data->args.inode, 9796 data->res.fattr); 9797 put_cred(data->cred); 9798 nfs_iput_and_deactive(data->inode); 9799 kfree(data); 9800} 9801 9802static const struct rpc_call_ops nfs4_layoutcommit_ops = { 9803 .rpc_call_prepare = nfs4_layoutcommit_prepare, 9804 .rpc_call_done = nfs4_layoutcommit_done, 9805 .rpc_release = nfs4_layoutcommit_release, 9806}; 9807 9808int 9809nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 9810{ 9811 struct rpc_message msg = { 9812 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 9813 .rpc_argp = &data->args, 9814 .rpc_resp = &data->res, 9815 .rpc_cred = data->cred, 9816 }; 9817 struct rpc_task_setup task_setup_data = { 9818 .task = &data->task, 9819 .rpc_client = NFS_CLIENT(data->args.inode), 9820 .rpc_message = &msg, 9821 .callback_ops = &nfs4_layoutcommit_ops, 9822 .callback_data = data, 9823 }; 9824 struct rpc_task *task; 9825 int status = 0; 9826 9827 dprintk("NFS: initiating layoutcommit call. sync %d " 9828 "lbw: %llu inode %lu\n", sync, 9829 data->args.lastbytewritten, 9830 data->args.inode->i_ino); 9831 9832 if (!sync) { 9833 data->inode = nfs_igrab_and_active(data->args.inode); 9834 if (data->inode == NULL) { 9835 nfs4_layoutcommit_release(data); 9836 return -EAGAIN; 9837 } 9838 task_setup_data.flags = RPC_TASK_ASYNC; 9839 } 9840 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 9841 task = rpc_run_task(&task_setup_data); 9842 if (IS_ERR(task)) 9843 return PTR_ERR(task); 9844 if (sync) 9845 status = task->tk_status; 9846 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 9847 dprintk("%s: status %d\n", __func__, status); 9848 rpc_put_task(task); 9849 return status; 9850} 9851 9852/* 9853 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 9854 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 9855 */ 9856static int 9857_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9858 struct nfs_fsinfo *info, 9859 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 9860{ 9861 struct nfs41_secinfo_no_name_args args = { 9862 .style = SECINFO_STYLE_CURRENT_FH, 9863 }; 9864 struct nfs4_secinfo_res res = { 9865 .flavors = flavors, 9866 }; 9867 struct rpc_message msg = { 9868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 9869 .rpc_argp = &args, 9870 .rpc_resp = &res, 9871 }; 9872 struct nfs4_call_sync_data data = { 9873 .seq_server = server, 9874 .seq_args = &args.seq_args, 9875 .seq_res = &res.seq_res, 9876 }; 9877 struct rpc_task_setup task_setup = { 9878 .rpc_client = server->client, 9879 .rpc_message = &msg, 9880 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 9881 .callback_data = &data, 9882 .flags = RPC_TASK_NO_ROUND_ROBIN, 9883 }; 9884 const struct cred *cred = NULL; 9885 int status; 9886 9887 if (use_integrity) { 9888 task_setup.rpc_client = server->nfs_client->cl_rpcclient; 9889 9890 cred = nfs4_get_clid_cred(server->nfs_client); 9891 msg.rpc_cred = cred; 9892 } 9893 9894 dprintk("--> %s\n", __func__); 9895 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 9896 status = nfs4_call_sync_custom(&task_setup); 9897 dprintk("<-- %s status=%d\n", __func__, status); 9898 9899 put_cred(cred); 9900 9901 return status; 9902} 9903 9904static int 9905nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9906 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 9907{ 9908 struct nfs4_exception exception = { 9909 .interruptible = true, 9910 }; 9911 int err; 9912 do { 9913 /* first try using integrity protection */ 9914 err = -NFS4ERR_WRONGSEC; 9915 9916 /* try to use integrity protection with machine cred */ 9917 if (_nfs4_is_integrity_protected(server->nfs_client)) 9918 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9919 flavors, true); 9920 9921 /* 9922 * if unable to use integrity protection, or SECINFO with 9923 * integrity protection returns NFS4ERR_WRONGSEC (which is 9924 * disallowed by spec, but exists in deployed servers) use 9925 * the current filesystem's rpc_client and the user cred. 9926 */ 9927 if (err == -NFS4ERR_WRONGSEC) 9928 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9929 flavors, false); 9930 9931 switch (err) { 9932 case 0: 9933 case -NFS4ERR_WRONGSEC: 9934 case -ENOTSUPP: 9935 goto out; 9936 default: 9937 err = nfs4_handle_exception(server, err, &exception); 9938 } 9939 } while (exception.retry); 9940out: 9941 return err; 9942} 9943 9944static int 9945nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 9946 struct nfs_fsinfo *info) 9947{ 9948 int err; 9949 struct page *page; 9950 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 9951 struct nfs4_secinfo_flavors *flavors; 9952 struct nfs4_secinfo4 *secinfo; 9953 int i; 9954 9955 page = alloc_page(GFP_KERNEL); 9956 if (!page) { 9957 err = -ENOMEM; 9958 goto out; 9959 } 9960 9961 flavors = page_address(page); 9962 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 9963 9964 /* 9965 * Fall back on "guess and check" method if 9966 * the server doesn't support SECINFO_NO_NAME 9967 */ 9968 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 9969 err = nfs4_find_root_sec(server, fhandle, info); 9970 goto out_freepage; 9971 } 9972 if (err) 9973 goto out_freepage; 9974 9975 for (i = 0; i < flavors->num_flavors; i++) { 9976 secinfo = &flavors->flavors[i]; 9977 9978 switch (secinfo->flavor) { 9979 case RPC_AUTH_NULL: 9980 case RPC_AUTH_UNIX: 9981 case RPC_AUTH_GSS: 9982 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 9983 &secinfo->flavor_info); 9984 break; 9985 default: 9986 flavor = RPC_AUTH_MAXFLAVOR; 9987 break; 9988 } 9989 9990 if (!nfs_auth_info_match(&server->auth_info, flavor)) 9991 flavor = RPC_AUTH_MAXFLAVOR; 9992 9993 if (flavor != RPC_AUTH_MAXFLAVOR) { 9994 err = nfs4_lookup_root_sec(server, fhandle, 9995 info, flavor); 9996 if (!err) 9997 break; 9998 } 9999 } 10000 10001 if (flavor == RPC_AUTH_MAXFLAVOR) 10002 err = -EPERM; 10003 10004out_freepage: 10005 put_page(page); 10006 if (err == -EACCES) 10007 return -EPERM; 10008out: 10009 return err; 10010} 10011 10012static int _nfs41_test_stateid(struct nfs_server *server, 10013 nfs4_stateid *stateid, 10014 const struct cred *cred) 10015{ 10016 int status; 10017 struct nfs41_test_stateid_args args = { 10018 .stateid = stateid, 10019 }; 10020 struct nfs41_test_stateid_res res; 10021 struct rpc_message msg = { 10022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 10023 .rpc_argp = &args, 10024 .rpc_resp = &res, 10025 .rpc_cred = cred, 10026 }; 10027 struct rpc_clnt *rpc_client = server->client; 10028 10029 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10030 &rpc_client, &msg); 10031 10032 dprintk("NFS call test_stateid %p\n", stateid); 10033 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 10034 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 10035 &args.seq_args, &res.seq_res); 10036 if (status != NFS_OK) { 10037 dprintk("NFS reply test_stateid: failed, %d\n", status); 10038 return status; 10039 } 10040 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 10041 return -res.status; 10042} 10043 10044static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 10045 int err, struct nfs4_exception *exception) 10046{ 10047 exception->retry = 0; 10048 switch(err) { 10049 case -NFS4ERR_DELAY: 10050 case -NFS4ERR_RETRY_UNCACHED_REP: 10051 nfs4_handle_exception(server, err, exception); 10052 break; 10053 case -NFS4ERR_BADSESSION: 10054 case -NFS4ERR_BADSLOT: 10055 case -NFS4ERR_BAD_HIGH_SLOT: 10056 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10057 case -NFS4ERR_DEADSESSION: 10058 nfs4_do_handle_exception(server, err, exception); 10059 } 10060} 10061 10062/** 10063 * nfs41_test_stateid - perform a TEST_STATEID operation 10064 * 10065 * @server: server / transport on which to perform the operation 10066 * @stateid: state ID to test 10067 * @cred: credential 10068 * 10069 * Returns NFS_OK if the server recognizes that "stateid" is valid. 10070 * Otherwise a negative NFS4ERR value is returned if the operation 10071 * failed or the state ID is not currently valid. 10072 */ 10073static int nfs41_test_stateid(struct nfs_server *server, 10074 nfs4_stateid *stateid, 10075 const struct cred *cred) 10076{ 10077 struct nfs4_exception exception = { 10078 .interruptible = true, 10079 }; 10080 int err; 10081 do { 10082 err = _nfs41_test_stateid(server, stateid, cred); 10083 nfs4_handle_delay_or_session_error(server, err, &exception); 10084 } while (exception.retry); 10085 return err; 10086} 10087 10088struct nfs_free_stateid_data { 10089 struct nfs_server *server; 10090 struct nfs41_free_stateid_args args; 10091 struct nfs41_free_stateid_res res; 10092}; 10093 10094static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 10095{ 10096 struct nfs_free_stateid_data *data = calldata; 10097 nfs4_setup_sequence(data->server->nfs_client, 10098 &data->args.seq_args, 10099 &data->res.seq_res, 10100 task); 10101} 10102 10103static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 10104{ 10105 struct nfs_free_stateid_data *data = calldata; 10106 10107 nfs41_sequence_done(task, &data->res.seq_res); 10108 10109 switch (task->tk_status) { 10110 case -NFS4ERR_DELAY: 10111 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 10112 rpc_restart_call_prepare(task); 10113 } 10114} 10115 10116static void nfs41_free_stateid_release(void *calldata) 10117{ 10118 kfree(calldata); 10119} 10120 10121static const struct rpc_call_ops nfs41_free_stateid_ops = { 10122 .rpc_call_prepare = nfs41_free_stateid_prepare, 10123 .rpc_call_done = nfs41_free_stateid_done, 10124 .rpc_release = nfs41_free_stateid_release, 10125}; 10126 10127/** 10128 * nfs41_free_stateid - perform a FREE_STATEID operation 10129 * 10130 * @server: server / transport on which to perform the operation 10131 * @stateid: state ID to release 10132 * @cred: credential 10133 * @privileged: set to true if this call needs to be privileged 10134 * 10135 * Note: this function is always asynchronous. 10136 */ 10137static int nfs41_free_stateid(struct nfs_server *server, 10138 const nfs4_stateid *stateid, 10139 const struct cred *cred, 10140 bool privileged) 10141{ 10142 struct rpc_message msg = { 10143 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 10144 .rpc_cred = cred, 10145 }; 10146 struct rpc_task_setup task_setup = { 10147 .rpc_client = server->client, 10148 .rpc_message = &msg, 10149 .callback_ops = &nfs41_free_stateid_ops, 10150 .flags = RPC_TASK_ASYNC, 10151 }; 10152 struct nfs_free_stateid_data *data; 10153 struct rpc_task *task; 10154 10155 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10156 &task_setup.rpc_client, &msg); 10157 10158 dprintk("NFS call free_stateid %p\n", stateid); 10159 data = kmalloc(sizeof(*data), GFP_NOFS); 10160 if (!data) 10161 return -ENOMEM; 10162 data->server = server; 10163 nfs4_stateid_copy(&data->args.stateid, stateid); 10164 10165 task_setup.callback_data = data; 10166 10167 msg.rpc_argp = &data->args; 10168 msg.rpc_resp = &data->res; 10169 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 10170 task = rpc_run_task(&task_setup); 10171 if (IS_ERR(task)) 10172 return PTR_ERR(task); 10173 rpc_put_task(task); 10174 return 0; 10175} 10176 10177static void 10178nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 10179{ 10180 const struct cred *cred = lsp->ls_state->owner->so_cred; 10181 10182 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 10183 nfs4_free_lock_state(server, lsp); 10184} 10185 10186static bool nfs41_match_stateid(const nfs4_stateid *s1, 10187 const nfs4_stateid *s2) 10188{ 10189 if (s1->type != s2->type) 10190 return false; 10191 10192 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 10193 return false; 10194 10195 if (s1->seqid == s2->seqid) 10196 return true; 10197 10198 return s1->seqid == 0 || s2->seqid == 0; 10199} 10200 10201#endif /* CONFIG_NFS_V4_1 */ 10202 10203static bool nfs4_match_stateid(const nfs4_stateid *s1, 10204 const nfs4_stateid *s2) 10205{ 10206 return nfs4_stateid_match(s1, s2); 10207} 10208 10209 10210static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 10211 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10212 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10213 .recover_open = nfs4_open_reclaim, 10214 .recover_lock = nfs4_lock_reclaim, 10215 .establish_clid = nfs4_init_clientid, 10216 .detect_trunking = nfs40_discover_server_trunking, 10217}; 10218 10219#if defined(CONFIG_NFS_V4_1) 10220static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 10221 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10222 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10223 .recover_open = nfs4_open_reclaim, 10224 .recover_lock = nfs4_lock_reclaim, 10225 .establish_clid = nfs41_init_clientid, 10226 .reclaim_complete = nfs41_proc_reclaim_complete, 10227 .detect_trunking = nfs41_discover_server_trunking, 10228}; 10229#endif /* CONFIG_NFS_V4_1 */ 10230 10231static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 10232 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10233 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10234 .recover_open = nfs40_open_expired, 10235 .recover_lock = nfs4_lock_expired, 10236 .establish_clid = nfs4_init_clientid, 10237}; 10238 10239#if defined(CONFIG_NFS_V4_1) 10240static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 10241 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10242 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10243 .recover_open = nfs41_open_expired, 10244 .recover_lock = nfs41_lock_expired, 10245 .establish_clid = nfs41_init_clientid, 10246}; 10247#endif /* CONFIG_NFS_V4_1 */ 10248 10249static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 10250 .sched_state_renewal = nfs4_proc_async_renew, 10251 .get_state_renewal_cred = nfs4_get_renew_cred, 10252 .renew_lease = nfs4_proc_renew, 10253}; 10254 10255#if defined(CONFIG_NFS_V4_1) 10256static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 10257 .sched_state_renewal = nfs41_proc_async_sequence, 10258 .get_state_renewal_cred = nfs4_get_machine_cred, 10259 .renew_lease = nfs4_proc_sequence, 10260}; 10261#endif 10262 10263static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 10264 .get_locations = _nfs40_proc_get_locations, 10265 .fsid_present = _nfs40_proc_fsid_present, 10266}; 10267 10268#if defined(CONFIG_NFS_V4_1) 10269static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 10270 .get_locations = _nfs41_proc_get_locations, 10271 .fsid_present = _nfs41_proc_fsid_present, 10272}; 10273#endif /* CONFIG_NFS_V4_1 */ 10274 10275static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 10276 .minor_version = 0, 10277 .init_caps = NFS_CAP_READDIRPLUS 10278 | NFS_CAP_ATOMIC_OPEN 10279 | NFS_CAP_POSIX_LOCK, 10280 .init_client = nfs40_init_client, 10281 .shutdown_client = nfs40_shutdown_client, 10282 .match_stateid = nfs4_match_stateid, 10283 .find_root_sec = nfs4_find_root_sec, 10284 .free_lock_state = nfs4_release_lockowner, 10285 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 10286 .alloc_seqid = nfs_alloc_seqid, 10287 .call_sync_ops = &nfs40_call_sync_ops, 10288 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 10289 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 10290 .state_renewal_ops = &nfs40_state_renewal_ops, 10291 .mig_recovery_ops = &nfs40_mig_recovery_ops, 10292}; 10293 10294#if defined(CONFIG_NFS_V4_1) 10295static struct nfs_seqid * 10296nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 10297{ 10298 return NULL; 10299} 10300 10301static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 10302 .minor_version = 1, 10303 .init_caps = NFS_CAP_READDIRPLUS 10304 | NFS_CAP_ATOMIC_OPEN 10305 | NFS_CAP_POSIX_LOCK 10306 | NFS_CAP_STATEID_NFSV41 10307 | NFS_CAP_ATOMIC_OPEN_V1 10308 | NFS_CAP_LGOPEN, 10309 .init_client = nfs41_init_client, 10310 .shutdown_client = nfs41_shutdown_client, 10311 .match_stateid = nfs41_match_stateid, 10312 .find_root_sec = nfs41_find_root_sec, 10313 .free_lock_state = nfs41_free_lock_state, 10314 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10315 .alloc_seqid = nfs_alloc_no_seqid, 10316 .session_trunk = nfs4_test_session_trunk, 10317 .call_sync_ops = &nfs41_call_sync_ops, 10318 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10319 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10320 .state_renewal_ops = &nfs41_state_renewal_ops, 10321 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10322}; 10323#endif 10324 10325#if defined(CONFIG_NFS_V4_2) 10326static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 10327 .minor_version = 2, 10328 .init_caps = NFS_CAP_READDIRPLUS 10329 | NFS_CAP_ATOMIC_OPEN 10330 | NFS_CAP_POSIX_LOCK 10331 | NFS_CAP_STATEID_NFSV41 10332 | NFS_CAP_ATOMIC_OPEN_V1 10333 | NFS_CAP_LGOPEN 10334 | NFS_CAP_ALLOCATE 10335 | NFS_CAP_COPY 10336 | NFS_CAP_OFFLOAD_CANCEL 10337 | NFS_CAP_COPY_NOTIFY 10338 | NFS_CAP_DEALLOCATE 10339 | NFS_CAP_SEEK 10340 | NFS_CAP_LAYOUTSTATS 10341 | NFS_CAP_CLONE 10342 | NFS_CAP_LAYOUTERROR 10343 | NFS_CAP_READ_PLUS, 10344 .init_client = nfs41_init_client, 10345 .shutdown_client = nfs41_shutdown_client, 10346 .match_stateid = nfs41_match_stateid, 10347 .find_root_sec = nfs41_find_root_sec, 10348 .free_lock_state = nfs41_free_lock_state, 10349 .call_sync_ops = &nfs41_call_sync_ops, 10350 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10351 .alloc_seqid = nfs_alloc_no_seqid, 10352 .session_trunk = nfs4_test_session_trunk, 10353 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10354 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10355 .state_renewal_ops = &nfs41_state_renewal_ops, 10356 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10357}; 10358#endif 10359 10360const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 10361 [0] = &nfs_v4_0_minor_ops, 10362#if defined(CONFIG_NFS_V4_1) 10363 [1] = &nfs_v4_1_minor_ops, 10364#endif 10365#if defined(CONFIG_NFS_V4_2) 10366 [2] = &nfs_v4_2_minor_ops, 10367#endif 10368}; 10369 10370static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 10371{ 10372 ssize_t error, error2, error3; 10373 size_t left = size; 10374 10375 error = generic_listxattr(dentry, list, left); 10376 if (error < 0) 10377 return error; 10378 if (list) { 10379 list += error; 10380 left -= error; 10381 } 10382 10383 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, left); 10384 if (error2 < 0) 10385 return error2; 10386 10387 if (list) { 10388 list += error2; 10389 left -= error2; 10390 } 10391 10392 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, left); 10393 if (error3 < 0) 10394 return error3; 10395 10396 error += error2 + error3; 10397 if (size && error > size) 10398 return -ERANGE; 10399 return error; 10400} 10401 10402static void nfs4_enable_swap(struct inode *inode) 10403{ 10404 /* The state manager thread must always be running. 10405 * It will notice the client is a swapper, and stay put. 10406 */ 10407 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 10408 10409 nfs4_schedule_state_manager(clp); 10410} 10411 10412static void nfs4_disable_swap(struct inode *inode) 10413{ 10414 /* The state manager thread will now exit once it is 10415 * woken. 10416 */ 10417 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 10418 10419 set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); 10420 clear_bit(NFS4CLNT_MANAGER_AVAILABLE, &clp->cl_state); 10421 wake_up_var(&clp->cl_state); 10422} 10423 10424static const struct inode_operations nfs4_dir_inode_operations = { 10425 .create = nfs_create, 10426 .lookup = nfs_lookup, 10427 .atomic_open = nfs_atomic_open, 10428 .link = nfs_link, 10429 .unlink = nfs_unlink, 10430 .symlink = nfs_symlink, 10431 .mkdir = nfs_mkdir, 10432 .rmdir = nfs_rmdir, 10433 .mknod = nfs_mknod, 10434 .rename = nfs_rename, 10435 .permission = nfs_permission, 10436 .getattr = nfs_getattr, 10437 .setattr = nfs_setattr, 10438 .listxattr = nfs4_listxattr, 10439}; 10440 10441static const struct inode_operations nfs4_file_inode_operations = { 10442 .permission = nfs_permission, 10443 .getattr = nfs_getattr, 10444 .setattr = nfs_setattr, 10445 .listxattr = nfs4_listxattr, 10446}; 10447 10448const struct nfs_rpc_ops nfs_v4_clientops = { 10449 .version = 4, /* protocol version */ 10450 .dentry_ops = &nfs4_dentry_operations, 10451 .dir_inode_ops = &nfs4_dir_inode_operations, 10452 .file_inode_ops = &nfs4_file_inode_operations, 10453 .file_ops = &nfs4_file_operations, 10454 .getroot = nfs4_proc_get_root, 10455 .submount = nfs4_submount, 10456 .try_get_tree = nfs4_try_get_tree, 10457 .getattr = nfs4_proc_getattr, 10458 .setattr = nfs4_proc_setattr, 10459 .lookup = nfs4_proc_lookup, 10460 .lookupp = nfs4_proc_lookupp, 10461 .access = nfs4_proc_access, 10462 .readlink = nfs4_proc_readlink, 10463 .create = nfs4_proc_create, 10464 .remove = nfs4_proc_remove, 10465 .unlink_setup = nfs4_proc_unlink_setup, 10466 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 10467 .unlink_done = nfs4_proc_unlink_done, 10468 .rename_setup = nfs4_proc_rename_setup, 10469 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 10470 .rename_done = nfs4_proc_rename_done, 10471 .link = nfs4_proc_link, 10472 .symlink = nfs4_proc_symlink, 10473 .mkdir = nfs4_proc_mkdir, 10474 .rmdir = nfs4_proc_rmdir, 10475 .readdir = nfs4_proc_readdir, 10476 .mknod = nfs4_proc_mknod, 10477 .statfs = nfs4_proc_statfs, 10478 .fsinfo = nfs4_proc_fsinfo, 10479 .pathconf = nfs4_proc_pathconf, 10480 .set_capabilities = nfs4_server_capabilities, 10481 .decode_dirent = nfs4_decode_dirent, 10482 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 10483 .read_setup = nfs4_proc_read_setup, 10484 .read_done = nfs4_read_done, 10485 .write_setup = nfs4_proc_write_setup, 10486 .write_done = nfs4_write_done, 10487 .commit_setup = nfs4_proc_commit_setup, 10488 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 10489 .commit_done = nfs4_commit_done, 10490 .lock = nfs4_proc_lock, 10491 .clear_acl_cache = nfs4_zap_acl_attr, 10492 .close_context = nfs4_close_context, 10493 .open_context = nfs4_atomic_open, 10494 .have_delegation = nfs4_have_delegation, 10495 .alloc_client = nfs4_alloc_client, 10496 .init_client = nfs4_init_client, 10497 .free_client = nfs4_free_client, 10498 .create_server = nfs4_create_server, 10499 .clone_server = nfs_clone_server, 10500 .enable_swap = nfs4_enable_swap, 10501 .disable_swap = nfs4_disable_swap, 10502}; 10503 10504static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 10505 .name = XATTR_NAME_NFSV4_ACL, 10506 .list = nfs4_xattr_list_nfs4_acl, 10507 .get = nfs4_xattr_get_nfs4_acl, 10508 .set = nfs4_xattr_set_nfs4_acl, 10509}; 10510 10511#ifdef CONFIG_NFS_V4_2 10512static const struct xattr_handler nfs4_xattr_nfs4_user_handler = { 10513 .prefix = XATTR_USER_PREFIX, 10514 .get = nfs4_xattr_get_nfs4_user, 10515 .set = nfs4_xattr_set_nfs4_user, 10516}; 10517#endif 10518 10519const struct xattr_handler *nfs4_xattr_handlers[] = { 10520 &nfs4_xattr_nfs4_acl_handler, 10521#ifdef CONFIG_NFS_V4_SECURITY_LABEL 10522 &nfs4_xattr_nfs4_label_handler, 10523#endif 10524#ifdef CONFIG_NFS_V4_2 10525 &nfs4_xattr_nfs4_user_handler, 10526#endif 10527 NULL 10528}; 10529 10530/* 10531 * Local variables: 10532 * c-basic-offset: 8 10533 * End: 10534 */ 10535