1/* 2 * Server-side procedures for NFSv4. 3 * 4 * Copyright (c) 2002 The Regents of the University of Michigan. 5 * All rights reserved. 6 * 7 * Kendrick Smith <kmsmith@umich.edu> 8 * Andy Adamson <andros@umich.edu> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35#include <linux/fs_struct.h> 36#include <linux/file.h> 37#include <linux/falloc.h> 38#include <linux/slab.h> 39#include <linux/kthread.h> 40#include <linux/namei.h> 41 42#include <linux/sunrpc/addr.h> 43#include <linux/nfs_ssc.h> 44 45#include "idmap.h" 46#include "cache.h" 47#include "xdr4.h" 48#include "vfs.h" 49#include "current_stateid.h" 50#include "netns.h" 51#include "acl.h" 52#include "pnfs.h" 53#include "trace.h" 54 55static bool inter_copy_offload_enable; 56module_param(inter_copy_offload_enable, bool, 0644); 57MODULE_PARM_DESC(inter_copy_offload_enable, 58 "Enable inter server to server copy offload. Default: false"); 59 60#ifdef CONFIG_NFSD_V4_2_INTER_SSC 61static int nfsd4_ssc_umount_timeout = 900000; /* default to 15 mins */ 62module_param(nfsd4_ssc_umount_timeout, int, 0644); 63MODULE_PARM_DESC(nfsd4_ssc_umount_timeout, 64 "idle msecs before unmount export from source server"); 65#endif 66 67#define NFSDDBG_FACILITY NFSDDBG_PROC 68 69static u32 nfsd_attrmask[] = { 70 NFSD_WRITEABLE_ATTRS_WORD0, 71 NFSD_WRITEABLE_ATTRS_WORD1, 72 NFSD_WRITEABLE_ATTRS_WORD2 73}; 74 75static u32 nfsd41_ex_attrmask[] = { 76 NFSD_SUPPATTR_EXCLCREAT_WORD0, 77 NFSD_SUPPATTR_EXCLCREAT_WORD1, 78 NFSD_SUPPATTR_EXCLCREAT_WORD2 79}; 80 81static __be32 82check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 83 u32 *bmval, u32 *writable) 84{ 85 struct dentry *dentry = cstate->current_fh.fh_dentry; 86 struct svc_export *exp = cstate->current_fh.fh_export; 87 88 if (!nfsd_attrs_supported(cstate->minorversion, bmval)) 89 return nfserr_attrnotsupp; 90 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry))) 91 return nfserr_attrnotsupp; 92 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) && 93 !(exp->ex_flags & NFSEXP_SECURITY_LABEL)) 94 return nfserr_attrnotsupp; 95 if (writable && !bmval_is_subset(bmval, writable)) 96 return nfserr_inval; 97 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) && 98 (bmval[1] & FATTR4_WORD1_MODE)) 99 return nfserr_inval; 100 return nfs_ok; 101} 102 103static __be32 104nfsd4_check_open_attributes(struct svc_rqst *rqstp, 105 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 106{ 107 __be32 status = nfs_ok; 108 109 if (open->op_create == NFS4_OPEN_CREATE) { 110 if (open->op_createmode == NFS4_CREATE_UNCHECKED 111 || open->op_createmode == NFS4_CREATE_GUARDED) 112 status = check_attr_support(rqstp, cstate, 113 open->op_bmval, nfsd_attrmask); 114 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 115 status = check_attr_support(rqstp, cstate, 116 open->op_bmval, nfsd41_ex_attrmask); 117 } 118 119 return status; 120} 121 122static int 123is_create_with_attrs(struct nfsd4_open *open) 124{ 125 return open->op_create == NFS4_OPEN_CREATE 126 && (open->op_createmode == NFS4_CREATE_UNCHECKED 127 || open->op_createmode == NFS4_CREATE_GUARDED 128 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 129} 130 131static inline void 132fh_dup2(struct svc_fh *dst, struct svc_fh *src) 133{ 134 fh_put(dst); 135 dget(src->fh_dentry); 136 if (src->fh_export) 137 exp_get(src->fh_export); 138 *dst = *src; 139} 140 141static __be32 142do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 143{ 144 145 if (open->op_truncate && 146 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 147 return nfserr_inval; 148 149 accmode |= NFSD_MAY_READ_IF_EXEC; 150 151 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 152 accmode |= NFSD_MAY_READ; 153 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 154 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 155 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 156 accmode |= NFSD_MAY_WRITE; 157 158 return fh_verify(rqstp, current_fh, S_IFREG, accmode); 159} 160 161static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 162{ 163 umode_t mode = d_inode(fh->fh_dentry)->i_mode; 164 165 if (S_ISREG(mode)) 166 return nfs_ok; 167 if (S_ISDIR(mode)) 168 return nfserr_isdir; 169 /* 170 * Using err_symlink as our catch-all case may look odd; but 171 * there's no other obvious error for this case in 4.0, and we 172 * happen to know that it will cause the linux v4 client to do 173 * the right thing on attempts to open something other than a 174 * regular file. 175 */ 176 return nfserr_symlink; 177} 178 179static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 180{ 181 if (nfsd4_has_session(cstate)) 182 return; 183 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 184 &resfh->fh_handle); 185} 186 187static inline bool nfsd4_create_is_exclusive(int createmode) 188{ 189 return createmode == NFS4_CREATE_EXCLUSIVE || 190 createmode == NFS4_CREATE_EXCLUSIVE4_1; 191} 192 193static __be32 194nfsd4_vfs_create(struct svc_fh *fhp, struct dentry *child, 195 struct nfsd4_open *open) 196{ 197 struct file *filp; 198 struct path path; 199 int oflags; 200 201 oflags = O_CREAT | O_LARGEFILE; 202 switch (open->op_share_access & NFS4_SHARE_ACCESS_BOTH) { 203 case NFS4_SHARE_ACCESS_WRITE: 204 oflags |= O_WRONLY; 205 break; 206 case NFS4_SHARE_ACCESS_BOTH: 207 oflags |= O_RDWR; 208 break; 209 default: 210 oflags |= O_RDONLY; 211 } 212 213 path.mnt = fhp->fh_export->ex_path.mnt; 214 path.dentry = child; 215 filp = dentry_create(&path, oflags, open->op_iattr.ia_mode, 216 current_cred()); 217 if (IS_ERR(filp)) 218 return nfserrno(PTR_ERR(filp)); 219 220 open->op_filp = filp; 221 return nfs_ok; 222} 223 224/* 225 * Implement NFSv4's unchecked, guarded, and exclusive create 226 * semantics for regular files. Open state for this new file is 227 * subsequently fabricated in nfsd4_process_open2(). 228 * 229 * Upon return, caller must release @fhp and @resfhp. 230 */ 231static __be32 232nfsd4_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp, 233 struct svc_fh *resfhp, struct nfsd4_open *open) 234{ 235 struct iattr *iap = &open->op_iattr; 236 struct nfsd_attrs attrs = { 237 .na_iattr = iap, 238 .na_seclabel = &open->op_label, 239 }; 240 struct dentry *parent, *child; 241 __u32 v_mtime, v_atime; 242 struct inode *inode; 243 __be32 status; 244 int host_err; 245 246 if (isdotent(open->op_fname, open->op_fnamelen)) 247 return nfserr_exist; 248 if (!(iap->ia_valid & ATTR_MODE)) 249 iap->ia_mode = 0; 250 251 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC); 252 if (status != nfs_ok) 253 return status; 254 parent = fhp->fh_dentry; 255 inode = d_inode(parent); 256 257 host_err = fh_want_write(fhp); 258 if (host_err) 259 return nfserrno(host_err); 260 261 if (is_create_with_attrs(open)) 262 nfsd4_acl_to_attr(NF4REG, open->op_acl, &attrs); 263 264 inode_lock_nested(inode, I_MUTEX_PARENT); 265 266 child = lookup_one_len(open->op_fname, parent, open->op_fnamelen); 267 if (IS_ERR(child)) { 268 status = nfserrno(PTR_ERR(child)); 269 goto out; 270 } 271 272 if (d_really_is_negative(child)) { 273 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_CREATE); 274 if (status != nfs_ok) 275 goto out; 276 } 277 278 status = fh_compose(resfhp, fhp->fh_export, child, fhp); 279 if (status != nfs_ok) 280 goto out; 281 282 v_mtime = 0; 283 v_atime = 0; 284 if (nfsd4_create_is_exclusive(open->op_createmode)) { 285 u32 *verifier = (u32 *)open->op_verf.data; 286 287 /* 288 * Solaris 7 gets confused (bugid 4218508) if these have 289 * the high bit set, as do xfs filesystems without the 290 * "bigtime" feature. So just clear the high bits. If this 291 * is ever changed to use different attrs for storing the 292 * verifier, then do_open_lookup() will also need to be 293 * fixed accordingly. 294 */ 295 v_mtime = verifier[0] & 0x7fffffff; 296 v_atime = verifier[1] & 0x7fffffff; 297 } 298 299 if (d_really_is_positive(child)) { 300 /* NFSv4 protocol requires change attributes even though 301 * no change happened. 302 */ 303 status = fh_fill_both_attrs(fhp); 304 if (status != nfs_ok) 305 goto out; 306 307 switch (open->op_createmode) { 308 case NFS4_CREATE_UNCHECKED: 309 if (!d_is_reg(child)) 310 break; 311 312 /* 313 * In NFSv4, we don't want to truncate the file 314 * now. This would be wrong if the OPEN fails for 315 * some other reason. Furthermore, if the size is 316 * nonzero, we should ignore it according to spec! 317 */ 318 open->op_truncate = (iap->ia_valid & ATTR_SIZE) && 319 !iap->ia_size; 320 break; 321 case NFS4_CREATE_GUARDED: 322 status = nfserr_exist; 323 break; 324 case NFS4_CREATE_EXCLUSIVE: 325 if (d_inode(child)->i_mtime.tv_sec == v_mtime && 326 d_inode(child)->i_atime.tv_sec == v_atime && 327 d_inode(child)->i_size == 0) { 328 open->op_created = true; 329 break; /* subtle */ 330 } 331 status = nfserr_exist; 332 break; 333 case NFS4_CREATE_EXCLUSIVE4_1: 334 if (d_inode(child)->i_mtime.tv_sec == v_mtime && 335 d_inode(child)->i_atime.tv_sec == v_atime && 336 d_inode(child)->i_size == 0) { 337 open->op_created = true; 338 goto set_attr; /* subtle */ 339 } 340 status = nfserr_exist; 341 } 342 goto out; 343 } 344 345 if (!IS_POSIXACL(inode)) 346 iap->ia_mode &= ~current_umask(); 347 348 status = fh_fill_pre_attrs(fhp); 349 if (status != nfs_ok) 350 goto out; 351 status = nfsd4_vfs_create(fhp, child, open); 352 if (status != nfs_ok) 353 goto out; 354 open->op_created = true; 355 fh_fill_post_attrs(fhp); 356 357 /* A newly created file already has a file size of zero. */ 358 if ((iap->ia_valid & ATTR_SIZE) && (iap->ia_size == 0)) 359 iap->ia_valid &= ~ATTR_SIZE; 360 if (nfsd4_create_is_exclusive(open->op_createmode)) { 361 iap->ia_valid = ATTR_MTIME | ATTR_ATIME | 362 ATTR_MTIME_SET|ATTR_ATIME_SET; 363 iap->ia_mtime.tv_sec = v_mtime; 364 iap->ia_atime.tv_sec = v_atime; 365 iap->ia_mtime.tv_nsec = 0; 366 iap->ia_atime.tv_nsec = 0; 367 } 368 369set_attr: 370 status = nfsd_create_setattr(rqstp, fhp, resfhp, &attrs); 371 372 if (attrs.na_labelerr) 373 open->op_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 374 if (attrs.na_aclerr) 375 open->op_bmval[0] &= ~FATTR4_WORD0_ACL; 376out: 377 inode_unlock(inode); 378 nfsd_attrs_free(&attrs); 379 if (child && !IS_ERR(child)) 380 dput(child); 381 fh_drop_write(fhp); 382 return status; 383} 384 385/** 386 * set_change_info - set up the change_info4 for a reply 387 * @cinfo: pointer to nfsd4_change_info to be populated 388 * @fhp: pointer to svc_fh to use as source 389 * 390 * Many operations in NFSv4 require change_info4 in the reply. This function 391 * populates that from the info that we (should!) have already collected. In 392 * the event that we didn't get any pre-attrs, just zero out both. 393 */ 394static void 395set_change_info(struct nfsd4_change_info *cinfo, struct svc_fh *fhp) 396{ 397 cinfo->atomic = (u32)(fhp->fh_pre_saved && fhp->fh_post_saved && !fhp->fh_no_atomic_attr); 398 cinfo->before_change = fhp->fh_pre_change; 399 cinfo->after_change = fhp->fh_post_change; 400 401 /* 402 * If fetching the pre-change attributes failed, then we should 403 * have already failed the whole operation. We could have still 404 * failed to fetch post-change attributes however. 405 * 406 * If we didn't get post-op attrs, just zero-out the after 407 * field since we don't know what it should be. If the pre_saved 408 * field isn't set for some reason, throw warning and just copy 409 * whatever is in the after field. 410 */ 411 if (WARN_ON_ONCE(!fhp->fh_pre_saved)) 412 cinfo->before_change = 0; 413 if (!fhp->fh_post_saved) 414 cinfo->after_change = cinfo->before_change + 1; 415} 416 417static __be32 418do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) 419{ 420 struct svc_fh *current_fh = &cstate->current_fh; 421 int accmode; 422 __be32 status; 423 424 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 425 if (!*resfh) 426 return nfserr_jukebox; 427 fh_init(*resfh, NFS4_FHSIZE); 428 open->op_truncate = false; 429 430 if (open->op_create) { 431 /* FIXME: check session persistence and pnfs flags. 432 * The nfsv4.1 spec requires the following semantics: 433 * 434 * Persistent | pNFS | Server REQUIRED | Client Allowed 435 * Reply Cache | server | | 436 * -------------+--------+-----------------+-------------------- 437 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 438 * | | | (SHOULD) 439 * | | and EXCLUSIVE4 | or EXCLUSIVE4 440 * | | | (SHOULD NOT) 441 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 442 * yes | no | GUARDED4 | GUARDED4 443 * yes | yes | GUARDED4 | GUARDED4 444 */ 445 446 current->fs->umask = open->op_umask; 447 status = nfsd4_create_file(rqstp, current_fh, *resfh, open); 448 current->fs->umask = 0; 449 450 /* 451 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4 452 * use the returned bitmask to indicate which attributes 453 * we used to store the verifier: 454 */ 455 if (nfsd4_create_is_exclusive(open->op_createmode) && status == 0) 456 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS | 457 FATTR4_WORD1_TIME_MODIFY); 458 } else { 459 status = nfsd_lookup(rqstp, current_fh, 460 open->op_fname, open->op_fnamelen, *resfh); 461 if (status == nfs_ok) 462 /* NFSv4 protocol requires change attributes even though 463 * no change happened. 464 */ 465 status = fh_fill_both_attrs(current_fh); 466 } 467 if (status) 468 goto out; 469 status = nfsd_check_obj_isreg(*resfh); 470 if (status) 471 goto out; 472 473 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); 474 accmode = NFSD_MAY_NOP; 475 if (open->op_created || 476 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 477 accmode |= NFSD_MAY_OWNER_OVERRIDE; 478 status = do_open_permission(rqstp, *resfh, open, accmode); 479 set_change_info(&open->op_cinfo, current_fh); 480out: 481 return status; 482} 483 484static __be32 485do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 486{ 487 struct svc_fh *current_fh = &cstate->current_fh; 488 int accmode = 0; 489 490 /* We don't know the target directory, and therefore can not 491 * set the change info 492 */ 493 494 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 495 496 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 497 498 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 499 (open->op_iattr.ia_size == 0); 500 /* 501 * In the delegation case, the client is telling us about an 502 * open that it *already* performed locally, some time ago. We 503 * should let it succeed now if possible. 504 * 505 * In the case of a CLAIM_FH open, on the other hand, the client 506 * may be counting on us to enforce permissions (the Linux 4.1 507 * client uses this for normal opens, for example). 508 */ 509 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 510 accmode = NFSD_MAY_OWNER_OVERRIDE; 511 512 return do_open_permission(rqstp, current_fh, open, accmode); 513} 514 515static void 516copy_clientid(clientid_t *clid, struct nfsd4_session *session) 517{ 518 struct nfsd4_sessionid *sid = 519 (struct nfsd4_sessionid *)session->se_sessionid.data; 520 521 clid->cl_boot = sid->clientid.cl_boot; 522 clid->cl_id = sid->clientid.cl_id; 523} 524 525static __be32 526nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 527 union nfsd4_op_u *u) 528{ 529 struct nfsd4_open *open = &u->open; 530 __be32 status; 531 struct svc_fh *resfh = NULL; 532 struct net *net = SVC_NET(rqstp); 533 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 534 bool reclaim = false; 535 536 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 537 (int)open->op_fnamelen, open->op_fname, 538 open->op_openowner); 539 540 open->op_filp = NULL; 541 open->op_rqstp = rqstp; 542 543 /* This check required by spec. */ 544 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 545 return nfserr_inval; 546 547 open->op_created = false; 548 /* 549 * RFC5661 18.51.3 550 * Before RECLAIM_COMPLETE done, server should deny new lock 551 */ 552 if (nfsd4_has_session(cstate) && 553 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags) && 554 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 555 return nfserr_grace; 556 557 if (nfsd4_has_session(cstate)) 558 copy_clientid(&open->op_clientid, cstate->session); 559 560 /* check seqid for replay. set nfs4_owner */ 561 status = nfsd4_process_open1(cstate, open, nn); 562 if (status == nfserr_replay_me) { 563 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 564 fh_put(&cstate->current_fh); 565 fh_copy_shallow(&cstate->current_fh.fh_handle, 566 &rp->rp_openfh); 567 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 568 if (status) 569 dprintk("nfsd4_open: replay failed" 570 " restoring previous filehandle\n"); 571 else 572 status = nfserr_replay_me; 573 } 574 if (status) 575 goto out; 576 if (open->op_xdr_error) { 577 status = open->op_xdr_error; 578 goto out; 579 } 580 581 status = nfsd4_check_open_attributes(rqstp, cstate, open); 582 if (status) 583 goto out; 584 585 /* Openowner is now set, so sequence id will get bumped. Now we need 586 * these checks before we do any creates: */ 587 status = nfserr_grace; 588 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 589 goto out; 590 status = nfserr_no_grace; 591 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 592 goto out; 593 594 switch (open->op_claim_type) { 595 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 596 case NFS4_OPEN_CLAIM_NULL: 597 status = do_open_lookup(rqstp, cstate, open, &resfh); 598 if (status) 599 goto out; 600 break; 601 case NFS4_OPEN_CLAIM_PREVIOUS: 602 status = nfs4_check_open_reclaim(cstate->clp); 603 if (status) 604 goto out; 605 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 606 reclaim = true; 607 fallthrough; 608 case NFS4_OPEN_CLAIM_FH: 609 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 610 status = do_open_fhandle(rqstp, cstate, open); 611 if (status) 612 goto out; 613 resfh = &cstate->current_fh; 614 break; 615 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 616 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 617 status = nfserr_notsupp; 618 goto out; 619 default: 620 status = nfserr_inval; 621 goto out; 622 } 623 624 status = nfsd4_process_open2(rqstp, resfh, open); 625 if (status && open->op_created) 626 pr_warn("nfsd4_process_open2 failed to open newly-created file: status=%u\n", 627 be32_to_cpu(status)); 628 if (reclaim && !status) 629 nn->somebody_reclaimed = true; 630out: 631 if (open->op_filp) { 632 fput(open->op_filp); 633 open->op_filp = NULL; 634 } 635 if (resfh && resfh != &cstate->current_fh) { 636 fh_dup2(&cstate->current_fh, resfh); 637 fh_put(resfh); 638 kfree(resfh); 639 } 640 nfsd4_cleanup_open_state(cstate, open); 641 nfsd4_bump_seqid(cstate, status); 642 return status; 643} 644 645/* 646 * OPEN is the only seqid-mutating operation whose decoding can fail 647 * with a seqid-mutating error (specifically, decoding of user names in 648 * the attributes). Therefore we have to do some processing to look up 649 * the stateowner so that we can bump the seqid. 650 */ 651static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 652{ 653 struct nfsd4_open *open = &op->u.open; 654 655 if (!seqid_mutating_err(ntohl(op->status))) 656 return op->status; 657 if (nfsd4_has_session(cstate)) 658 return op->status; 659 open->op_xdr_error = op->status; 660 return nfsd4_open(rqstp, cstate, &op->u); 661} 662 663/* 664 * filehandle-manipulating ops. 665 */ 666static __be32 667nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 668 union nfsd4_op_u *u) 669{ 670 u->getfh = &cstate->current_fh; 671 return nfs_ok; 672} 673 674static __be32 675nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 676 union nfsd4_op_u *u) 677{ 678 struct nfsd4_putfh *putfh = &u->putfh; 679 __be32 ret; 680 681 fh_put(&cstate->current_fh); 682 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 683 memcpy(&cstate->current_fh.fh_handle.fh_raw, putfh->pf_fhval, 684 putfh->pf_fhlen); 685 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 686#ifdef CONFIG_NFSD_V4_2_INTER_SSC 687 if (ret == nfserr_stale && putfh->no_verify) { 688 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN); 689 ret = 0; 690 } 691#endif 692 return ret; 693} 694 695static __be32 696nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 697 union nfsd4_op_u *u) 698{ 699 fh_put(&cstate->current_fh); 700 701 return exp_pseudoroot(rqstp, &cstate->current_fh); 702} 703 704static __be32 705nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 706 union nfsd4_op_u *u) 707{ 708 if (!cstate->save_fh.fh_dentry) 709 return nfserr_restorefh; 710 711 fh_dup2(&cstate->current_fh, &cstate->save_fh); 712 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) { 713 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 714 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); 715 } 716 return nfs_ok; 717} 718 719static __be32 720nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 721 union nfsd4_op_u *u) 722{ 723 fh_dup2(&cstate->save_fh, &cstate->current_fh); 724 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) { 725 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 726 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG); 727 } 728 return nfs_ok; 729} 730 731/* 732 * misc nfsv4 ops 733 */ 734static __be32 735nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 736 union nfsd4_op_u *u) 737{ 738 struct nfsd4_access *access = &u->access; 739 u32 access_full; 740 741 access_full = NFS3_ACCESS_FULL; 742 if (cstate->minorversion >= 2) 743 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD | 744 NFS4_ACCESS_XAWRITE; 745 746 if (access->ac_req_access & ~access_full) 747 return nfserr_inval; 748 749 access->ac_resp_access = access->ac_req_access; 750 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 751 &access->ac_supported); 752} 753 754static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 755{ 756 __be32 *verf = (__be32 *)verifier->data; 757 758 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data)); 759 760 nfsd_copy_write_verifier(verf, net_generic(net, nfsd_net_id)); 761} 762 763static __be32 764nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 765 union nfsd4_op_u *u) 766{ 767 struct nfsd4_commit *commit = &u->commit; 768 struct nfsd_file *nf; 769 __be32 status; 770 771 status = nfsd_file_acquire(rqstp, &cstate->current_fh, NFSD_MAY_WRITE | 772 NFSD_MAY_NOT_BREAK_LEASE, &nf); 773 if (status != nfs_ok) 774 return status; 775 776 status = nfsd_commit(rqstp, &cstate->current_fh, nf, commit->co_offset, 777 commit->co_count, 778 (__be32 *)commit->co_verf.data); 779 nfsd_file_put(nf); 780 return status; 781} 782 783static __be32 784nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 785 union nfsd4_op_u *u) 786{ 787 struct nfsd4_create *create = &u->create; 788 struct nfsd_attrs attrs = { 789 .na_iattr = &create->cr_iattr, 790 .na_seclabel = &create->cr_label, 791 }; 792 struct svc_fh resfh; 793 __be32 status; 794 dev_t rdev; 795 796 fh_init(&resfh, NFS4_FHSIZE); 797 798 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP); 799 if (status) 800 return status; 801 802 status = check_attr_support(rqstp, cstate, create->cr_bmval, 803 nfsd_attrmask); 804 if (status) 805 return status; 806 807 status = nfsd4_acl_to_attr(create->cr_type, create->cr_acl, &attrs); 808 current->fs->umask = create->cr_umask; 809 switch (create->cr_type) { 810 case NF4LNK: 811 status = nfsd_symlink(rqstp, &cstate->current_fh, 812 create->cr_name, create->cr_namelen, 813 create->cr_data, &attrs, &resfh); 814 break; 815 816 case NF4BLK: 817 status = nfserr_inval; 818 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 819 if (MAJOR(rdev) != create->cr_specdata1 || 820 MINOR(rdev) != create->cr_specdata2) 821 goto out_umask; 822 status = nfsd_create(rqstp, &cstate->current_fh, 823 create->cr_name, create->cr_namelen, 824 &attrs, S_IFBLK, rdev, &resfh); 825 break; 826 827 case NF4CHR: 828 status = nfserr_inval; 829 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 830 if (MAJOR(rdev) != create->cr_specdata1 || 831 MINOR(rdev) != create->cr_specdata2) 832 goto out_umask; 833 status = nfsd_create(rqstp, &cstate->current_fh, 834 create->cr_name, create->cr_namelen, 835 &attrs, S_IFCHR, rdev, &resfh); 836 break; 837 838 case NF4SOCK: 839 status = nfsd_create(rqstp, &cstate->current_fh, 840 create->cr_name, create->cr_namelen, 841 &attrs, S_IFSOCK, 0, &resfh); 842 break; 843 844 case NF4FIFO: 845 status = nfsd_create(rqstp, &cstate->current_fh, 846 create->cr_name, create->cr_namelen, 847 &attrs, S_IFIFO, 0, &resfh); 848 break; 849 850 case NF4DIR: 851 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 852 status = nfsd_create(rqstp, &cstate->current_fh, 853 create->cr_name, create->cr_namelen, 854 &attrs, S_IFDIR, 0, &resfh); 855 break; 856 857 default: 858 status = nfserr_badtype; 859 } 860 861 if (status) 862 goto out; 863 864 if (attrs.na_labelerr) 865 create->cr_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 866 if (attrs.na_aclerr) 867 create->cr_bmval[0] &= ~FATTR4_WORD0_ACL; 868 set_change_info(&create->cr_cinfo, &cstate->current_fh); 869 fh_dup2(&cstate->current_fh, &resfh); 870out: 871 fh_put(&resfh); 872out_umask: 873 current->fs->umask = 0; 874 nfsd_attrs_free(&attrs); 875 return status; 876} 877 878static __be32 879nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 880 union nfsd4_op_u *u) 881{ 882 struct nfsd4_getattr *getattr = &u->getattr; 883 __be32 status; 884 885 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 886 if (status) 887 return status; 888 889 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 890 return nfserr_inval; 891 892 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 893 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 894 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 895 896 getattr->ga_fhp = &cstate->current_fh; 897 return nfs_ok; 898} 899 900static __be32 901nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 902 union nfsd4_op_u *u) 903{ 904 struct nfsd4_link *link = &u->link; 905 __be32 status; 906 907 status = nfsd_link(rqstp, &cstate->current_fh, 908 link->li_name, link->li_namelen, &cstate->save_fh); 909 if (!status) 910 set_change_info(&link->li_cinfo, &cstate->current_fh); 911 return status; 912} 913 914static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 915{ 916 struct svc_fh tmp_fh; 917 __be32 ret; 918 919 fh_init(&tmp_fh, NFS4_FHSIZE); 920 ret = exp_pseudoroot(rqstp, &tmp_fh); 921 if (ret) 922 return ret; 923 if (tmp_fh.fh_dentry == fh->fh_dentry) { 924 fh_put(&tmp_fh); 925 return nfserr_noent; 926 } 927 fh_put(&tmp_fh); 928 return nfsd_lookup(rqstp, fh, "..", 2, fh); 929} 930 931static __be32 932nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 933 union nfsd4_op_u *u) 934{ 935 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 936} 937 938static __be32 939nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 940 union nfsd4_op_u *u) 941{ 942 return nfsd_lookup(rqstp, &cstate->current_fh, 943 u->lookup.lo_name, u->lookup.lo_len, 944 &cstate->current_fh); 945} 946 947static __be32 948nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 949 union nfsd4_op_u *u) 950{ 951 struct nfsd4_read *read = &u->read; 952 __be32 status; 953 954 read->rd_nf = NULL; 955 956 trace_nfsd_read_start(rqstp, &cstate->current_fh, 957 read->rd_offset, read->rd_length); 958 959 read->rd_length = min_t(u32, read->rd_length, svc_max_payload(rqstp)); 960 if (read->rd_offset > (u64)OFFSET_MAX) 961 read->rd_offset = (u64)OFFSET_MAX; 962 if (read->rd_offset + read->rd_length > (u64)OFFSET_MAX) 963 read->rd_length = (u64)OFFSET_MAX - read->rd_offset; 964 965 /* 966 * If we do a zero copy read, then a client will see read data 967 * that reflects the state of the file *after* performing the 968 * following compound. 969 * 970 * To ensure proper ordering, we therefore turn off zero copy if 971 * the client wants us to do more in this compound: 972 */ 973 if (!nfsd4_last_compound_op(rqstp)) 974 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 975 976 /* check stateid */ 977 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 978 &read->rd_stateid, RD_STATE, 979 &read->rd_nf, NULL); 980 981 read->rd_rqstp = rqstp; 982 read->rd_fhp = &cstate->current_fh; 983 return status; 984} 985 986 987static void 988nfsd4_read_release(union nfsd4_op_u *u) 989{ 990 if (u->read.rd_nf) 991 nfsd_file_put(u->read.rd_nf); 992 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp, 993 u->read.rd_offset, u->read.rd_length); 994} 995 996static __be32 997nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 998 union nfsd4_op_u *u) 999{ 1000 struct nfsd4_readdir *readdir = &u->readdir; 1001 u64 cookie = readdir->rd_cookie; 1002 static const nfs4_verifier zeroverf; 1003 1004 /* no need to check permission - this will be done in nfsd_readdir() */ 1005 1006 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 1007 return nfserr_inval; 1008 1009 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 1010 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 1011 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 1012 1013 if ((cookie == 1) || (cookie == 2) || 1014 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 1015 return nfserr_bad_cookie; 1016 1017 readdir->rd_rqstp = rqstp; 1018 readdir->rd_fhp = &cstate->current_fh; 1019 return nfs_ok; 1020} 1021 1022static __be32 1023nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1024 union nfsd4_op_u *u) 1025{ 1026 u->readlink.rl_rqstp = rqstp; 1027 u->readlink.rl_fhp = &cstate->current_fh; 1028 return nfs_ok; 1029} 1030 1031static __be32 1032nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1033 union nfsd4_op_u *u) 1034{ 1035 struct nfsd4_remove *remove = &u->remove; 1036 __be32 status; 1037 1038 if (opens_in_grace(SVC_NET(rqstp))) 1039 return nfserr_grace; 1040 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 1041 remove->rm_name, remove->rm_namelen); 1042 if (!status) 1043 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 1044 return status; 1045} 1046 1047static __be32 1048nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1049 union nfsd4_op_u *u) 1050{ 1051 struct nfsd4_rename *rename = &u->rename; 1052 __be32 status; 1053 1054 if (opens_in_grace(SVC_NET(rqstp))) 1055 return nfserr_grace; 1056 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 1057 rename->rn_snamelen, &cstate->current_fh, 1058 rename->rn_tname, rename->rn_tnamelen); 1059 if (status) 1060 return status; 1061 set_change_info(&rename->rn_sinfo, &cstate->save_fh); 1062 set_change_info(&rename->rn_tinfo, &cstate->current_fh); 1063 return nfs_ok; 1064} 1065 1066static __be32 1067nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1068 union nfsd4_op_u *u) 1069{ 1070 struct nfsd4_secinfo *secinfo = &u->secinfo; 1071 struct svc_export *exp; 1072 struct dentry *dentry; 1073 __be32 err; 1074 1075 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 1076 if (err) 1077 return err; 1078 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 1079 secinfo->si_name, secinfo->si_namelen, 1080 &exp, &dentry); 1081 if (err) 1082 return err; 1083 if (d_really_is_negative(dentry)) { 1084 exp_put(exp); 1085 err = nfserr_noent; 1086 } else 1087 secinfo->si_exp = exp; 1088 dput(dentry); 1089 if (cstate->minorversion) 1090 /* See rfc 5661 section 2.6.3.1.1.8 */ 1091 fh_put(&cstate->current_fh); 1092 return err; 1093} 1094 1095static __be32 1096nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1097 union nfsd4_op_u *u) 1098{ 1099 __be32 err; 1100 1101 switch (u->secinfo_no_name.sin_style) { 1102 case NFS4_SECINFO_STYLE4_CURRENT_FH: 1103 break; 1104 case NFS4_SECINFO_STYLE4_PARENT: 1105 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 1106 if (err) 1107 return err; 1108 break; 1109 default: 1110 return nfserr_inval; 1111 } 1112 1113 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export); 1114 fh_put(&cstate->current_fh); 1115 return nfs_ok; 1116} 1117 1118static void 1119nfsd4_secinfo_release(union nfsd4_op_u *u) 1120{ 1121 if (u->secinfo.si_exp) 1122 exp_put(u->secinfo.si_exp); 1123} 1124 1125static void 1126nfsd4_secinfo_no_name_release(union nfsd4_op_u *u) 1127{ 1128 if (u->secinfo_no_name.sin_exp) 1129 exp_put(u->secinfo_no_name.sin_exp); 1130} 1131 1132static __be32 1133nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1134 union nfsd4_op_u *u) 1135{ 1136 struct nfsd4_setattr *setattr = &u->setattr; 1137 struct nfsd_attrs attrs = { 1138 .na_iattr = &setattr->sa_iattr, 1139 .na_seclabel = &setattr->sa_label, 1140 }; 1141 struct inode *inode; 1142 __be32 status = nfs_ok; 1143 int err; 1144 1145 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 1146 status = nfs4_preprocess_stateid_op(rqstp, cstate, 1147 &cstate->current_fh, &setattr->sa_stateid, 1148 WR_STATE, NULL, NULL); 1149 if (status) 1150 return status; 1151 } 1152 err = fh_want_write(&cstate->current_fh); 1153 if (err) 1154 return nfserrno(err); 1155 status = nfs_ok; 1156 1157 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 1158 nfsd_attrmask); 1159 if (status) 1160 goto out; 1161 1162 inode = cstate->current_fh.fh_dentry->d_inode; 1163 status = nfsd4_acl_to_attr(S_ISDIR(inode->i_mode) ? NF4DIR : NF4REG, 1164 setattr->sa_acl, &attrs); 1165 1166 if (status) 1167 goto out; 1168 status = nfsd_setattr(rqstp, &cstate->current_fh, &attrs, 1169 0, (time64_t)0); 1170 if (!status) 1171 status = nfserrno(attrs.na_labelerr); 1172 if (!status) 1173 status = nfserrno(attrs.na_aclerr); 1174out: 1175 nfsd_attrs_free(&attrs); 1176 fh_drop_write(&cstate->current_fh); 1177 return status; 1178} 1179 1180static __be32 1181nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1182 union nfsd4_op_u *u) 1183{ 1184 struct nfsd4_write *write = &u->write; 1185 stateid_t *stateid = &write->wr_stateid; 1186 struct nfsd_file *nf = NULL; 1187 __be32 status = nfs_ok; 1188 unsigned long cnt; 1189 int nvecs; 1190 1191 if (write->wr_offset > (u64)OFFSET_MAX || 1192 write->wr_offset + write->wr_buflen > (u64)OFFSET_MAX) 1193 return nfserr_fbig; 1194 1195 cnt = write->wr_buflen; 1196 trace_nfsd_write_start(rqstp, &cstate->current_fh, 1197 write->wr_offset, cnt); 1198 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1199 stateid, WR_STATE, &nf, NULL); 1200 if (status) 1201 return status; 1202 1203 write->wr_how_written = write->wr_stable_how; 1204 1205 nvecs = svc_fill_write_vector(rqstp, &write->wr_payload); 1206 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1207 1208 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf, 1209 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 1210 write->wr_how_written, 1211 (__be32 *)write->wr_verifier.data); 1212 nfsd_file_put(nf); 1213 1214 write->wr_bytes_written = cnt; 1215 trace_nfsd_write_done(rqstp, &cstate->current_fh, 1216 write->wr_offset, cnt); 1217 return status; 1218} 1219 1220static __be32 1221nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1222 stateid_t *src_stateid, struct nfsd_file **src, 1223 stateid_t *dst_stateid, struct nfsd_file **dst) 1224{ 1225 __be32 status; 1226 1227 if (!cstate->save_fh.fh_dentry) 1228 return nfserr_nofilehandle; 1229 1230 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, 1231 src_stateid, RD_STATE, src, NULL); 1232 if (status) 1233 goto out; 1234 1235 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1236 dst_stateid, WR_STATE, dst, NULL); 1237 if (status) 1238 goto out_put_src; 1239 1240 /* fix up for NFS-specific error code */ 1241 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) || 1242 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) { 1243 status = nfserr_wrong_type; 1244 goto out_put_dst; 1245 } 1246 1247out: 1248 return status; 1249out_put_dst: 1250 nfsd_file_put(*dst); 1251 *dst = NULL; 1252out_put_src: 1253 nfsd_file_put(*src); 1254 *src = NULL; 1255 goto out; 1256} 1257 1258static __be32 1259nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1260 union nfsd4_op_u *u) 1261{ 1262 struct nfsd4_clone *clone = &u->clone; 1263 struct nfsd_file *src, *dst; 1264 __be32 status; 1265 1266 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src, 1267 &clone->cl_dst_stateid, &dst); 1268 if (status) 1269 goto out; 1270 1271 status = nfsd4_clone_file_range(rqstp, src, clone->cl_src_pos, 1272 dst, clone->cl_dst_pos, clone->cl_count, 1273 EX_ISSYNC(cstate->current_fh.fh_export)); 1274 1275 nfsd_file_put(dst); 1276 nfsd_file_put(src); 1277out: 1278 return status; 1279} 1280 1281static void nfs4_put_copy(struct nfsd4_copy *copy) 1282{ 1283 if (!refcount_dec_and_test(©->refcount)) 1284 return; 1285 kfree(copy->cp_src); 1286 kfree(copy); 1287} 1288 1289static void nfsd4_stop_copy(struct nfsd4_copy *copy) 1290{ 1291 if (!test_and_set_bit(NFSD4_COPY_F_STOPPED, ©->cp_flags)) 1292 kthread_stop(copy->copy_task); 1293 nfs4_put_copy(copy); 1294} 1295 1296static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp) 1297{ 1298 struct nfsd4_copy *copy = NULL; 1299 1300 spin_lock(&clp->async_lock); 1301 if (!list_empty(&clp->async_copies)) { 1302 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy, 1303 copies); 1304 refcount_inc(©->refcount); 1305 } 1306 spin_unlock(&clp->async_lock); 1307 return copy; 1308} 1309 1310void nfsd4_shutdown_copy(struct nfs4_client *clp) 1311{ 1312 struct nfsd4_copy *copy; 1313 1314 while ((copy = nfsd4_get_copy(clp)) != NULL) 1315 nfsd4_stop_copy(copy); 1316} 1317#ifdef CONFIG_NFSD_V4_2_INTER_SSC 1318 1319extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, 1320 struct nfs_fh *src_fh, 1321 nfs4_stateid *stateid); 1322extern void nfs42_ssc_close(struct file *filep); 1323 1324extern void nfs_sb_deactive(struct super_block *sb); 1325 1326#define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys" 1327 1328/* 1329 * setup a work entry in the ssc delayed unmount list. 1330 */ 1331static __be32 nfsd4_ssc_setup_dul(struct nfsd_net *nn, char *ipaddr, 1332 struct nfsd4_ssc_umount_item **nsui) 1333{ 1334 struct nfsd4_ssc_umount_item *ni = NULL; 1335 struct nfsd4_ssc_umount_item *work = NULL; 1336 struct nfsd4_ssc_umount_item *tmp; 1337 DEFINE_WAIT(wait); 1338 __be32 status = 0; 1339 1340 *nsui = NULL; 1341 work = kzalloc(sizeof(*work), GFP_KERNEL); 1342try_again: 1343 spin_lock(&nn->nfsd_ssc_lock); 1344 list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) { 1345 if (strncmp(ni->nsui_ipaddr, ipaddr, sizeof(ni->nsui_ipaddr))) 1346 continue; 1347 /* found a match */ 1348 if (ni->nsui_busy) { 1349 /* wait - and try again */ 1350 prepare_to_wait(&nn->nfsd_ssc_waitq, &wait, TASK_IDLE); 1351 spin_unlock(&nn->nfsd_ssc_lock); 1352 1353 /* allow 20secs for mount/unmount for now - revisit */ 1354 if (kthread_should_stop() || 1355 (schedule_timeout(20*HZ) == 0)) { 1356 finish_wait(&nn->nfsd_ssc_waitq, &wait); 1357 kfree(work); 1358 return nfserr_eagain; 1359 } 1360 finish_wait(&nn->nfsd_ssc_waitq, &wait); 1361 goto try_again; 1362 } 1363 *nsui = ni; 1364 refcount_inc(&ni->nsui_refcnt); 1365 spin_unlock(&nn->nfsd_ssc_lock); 1366 kfree(work); 1367 1368 /* return vfsmount in (*nsui)->nsui_vfsmount */ 1369 return 0; 1370 } 1371 if (work) { 1372 strscpy(work->nsui_ipaddr, ipaddr, sizeof(work->nsui_ipaddr) - 1); 1373 refcount_set(&work->nsui_refcnt, 2); 1374 work->nsui_busy = true; 1375 list_add_tail(&work->nsui_list, &nn->nfsd_ssc_mount_list); 1376 *nsui = work; 1377 } else 1378 status = nfserr_resource; 1379 spin_unlock(&nn->nfsd_ssc_lock); 1380 return status; 1381} 1382 1383static void nfsd4_ssc_update_dul(struct nfsd_net *nn, 1384 struct nfsd4_ssc_umount_item *nsui, 1385 struct vfsmount *ss_mnt) 1386{ 1387 spin_lock(&nn->nfsd_ssc_lock); 1388 nsui->nsui_vfsmount = ss_mnt; 1389 nsui->nsui_busy = false; 1390 wake_up_all(&nn->nfsd_ssc_waitq); 1391 spin_unlock(&nn->nfsd_ssc_lock); 1392} 1393 1394static void nfsd4_ssc_cancel_dul(struct nfsd_net *nn, 1395 struct nfsd4_ssc_umount_item *nsui) 1396{ 1397 spin_lock(&nn->nfsd_ssc_lock); 1398 list_del(&nsui->nsui_list); 1399 wake_up_all(&nn->nfsd_ssc_waitq); 1400 spin_unlock(&nn->nfsd_ssc_lock); 1401 kfree(nsui); 1402} 1403 1404/* 1405 * Support one copy source server for now. 1406 */ 1407static __be32 1408nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp, 1409 struct nfsd4_ssc_umount_item **nsui) 1410{ 1411 struct file_system_type *type; 1412 struct vfsmount *ss_mnt; 1413 struct nfs42_netaddr *naddr; 1414 struct sockaddr_storage tmp_addr; 1415 size_t tmp_addrlen, match_netid_len = 3; 1416 char *startsep = "", *endsep = "", *match_netid = "tcp"; 1417 char *ipaddr, *dev_name, *raw_data; 1418 int len, raw_len; 1419 __be32 status = nfserr_inval; 1420 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1421 1422 naddr = &nss->u.nl4_addr; 1423 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr, 1424 naddr->addr_len, 1425 (struct sockaddr *)&tmp_addr, 1426 sizeof(tmp_addr)); 1427 *nsui = NULL; 1428 if (tmp_addrlen == 0) 1429 goto out_err; 1430 1431 if (tmp_addr.ss_family == AF_INET6) { 1432 startsep = "["; 1433 endsep = "]"; 1434 match_netid = "tcp6"; 1435 match_netid_len = 4; 1436 } 1437 1438 if (naddr->netid_len != match_netid_len || 1439 strncmp(naddr->netid, match_netid, naddr->netid_len)) 1440 goto out_err; 1441 1442 /* Construct the raw data for the vfs_kern_mount call */ 1443 len = RPC_MAX_ADDRBUFLEN + 1; 1444 ipaddr = kzalloc(len, GFP_KERNEL); 1445 if (!ipaddr) 1446 goto out_err; 1447 1448 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len); 1449 1450 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/ 1451 1452 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr); 1453 raw_data = kzalloc(raw_len, GFP_KERNEL); 1454 if (!raw_data) 1455 goto out_free_ipaddr; 1456 1457 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr); 1458 1459 status = nfserr_nodev; 1460 type = get_fs_type("nfs"); 1461 if (!type) 1462 goto out_free_rawdata; 1463 1464 /* Set the server:<export> for the vfs_kern_mount call */ 1465 dev_name = kzalloc(len + 5, GFP_KERNEL); 1466 if (!dev_name) 1467 goto out_free_rawdata; 1468 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep); 1469 1470 status = nfsd4_ssc_setup_dul(nn, ipaddr, nsui); 1471 if (status) 1472 goto out_free_devname; 1473 if ((*nsui)->nsui_vfsmount) 1474 goto out_done; 1475 1476 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */ 1477 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data); 1478 module_put(type->owner); 1479 if (IS_ERR(ss_mnt)) { 1480 status = nfserr_nodev; 1481 nfsd4_ssc_cancel_dul(nn, *nsui); 1482 goto out_free_devname; 1483 } 1484 nfsd4_ssc_update_dul(nn, *nsui, ss_mnt); 1485out_done: 1486 status = 0; 1487 1488out_free_devname: 1489 kfree(dev_name); 1490out_free_rawdata: 1491 kfree(raw_data); 1492out_free_ipaddr: 1493 kfree(ipaddr); 1494out_err: 1495 return status; 1496} 1497 1498/* 1499 * Verify COPY destination stateid. 1500 * 1501 * Connect to the source server with NFSv4.1. 1502 * Create the source struct file for nfsd_copy_range. 1503 * Called with COPY cstate: 1504 * SAVED_FH: source filehandle 1505 * CURRENT_FH: destination filehandle 1506 */ 1507static __be32 1508nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, 1509 struct nfsd4_compound_state *cstate, 1510 struct nfsd4_copy *copy) 1511{ 1512 struct svc_fh *s_fh = NULL; 1513 stateid_t *s_stid = ©->cp_src_stateid; 1514 __be32 status = nfserr_inval; 1515 1516 /* Verify the destination stateid and set dst struct file*/ 1517 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1518 ©->cp_dst_stateid, 1519 WR_STATE, ©->nf_dst, NULL); 1520 if (status) 1521 goto out; 1522 1523 status = nfsd4_interssc_connect(copy->cp_src, rqstp, ©->ss_nsui); 1524 if (status) 1525 goto out; 1526 1527 s_fh = &cstate->save_fh; 1528 1529 copy->c_fh.size = s_fh->fh_handle.fh_size; 1530 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_raw, copy->c_fh.size); 1531 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation); 1532 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque, 1533 sizeof(stateid_opaque_t)); 1534 1535 status = 0; 1536out: 1537 return status; 1538} 1539 1540static void 1541nfsd4_cleanup_inter_ssc(struct nfsd4_ssc_umount_item *nsui, struct file *filp, 1542 struct nfsd_file *dst) 1543{ 1544 struct nfsd_net *nn = net_generic(dst->nf_net, nfsd_net_id); 1545 long timeout = msecs_to_jiffies(nfsd4_ssc_umount_timeout); 1546 1547 nfs42_ssc_close(filp); 1548 fput(filp); 1549 1550 spin_lock(&nn->nfsd_ssc_lock); 1551 list_del(&nsui->nsui_list); 1552 /* 1553 * vfsmount can be shared by multiple exports, 1554 * decrement refcnt. If the count drops to 1 it 1555 * will be unmounted when nsui_expire expires. 1556 */ 1557 refcount_dec(&nsui->nsui_refcnt); 1558 nsui->nsui_expire = jiffies + timeout; 1559 list_add_tail(&nsui->nsui_list, &nn->nfsd_ssc_mount_list); 1560 spin_unlock(&nn->nfsd_ssc_lock); 1561} 1562 1563#else /* CONFIG_NFSD_V4_2_INTER_SSC */ 1564 1565static __be32 1566nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, 1567 struct nfsd4_compound_state *cstate, 1568 struct nfsd4_copy *copy) 1569{ 1570 return nfserr_inval; 1571} 1572 1573static void 1574nfsd4_cleanup_inter_ssc(struct nfsd4_ssc_umount_item *nsui, struct file *filp, 1575 struct nfsd_file *dst) 1576{ 1577} 1578 1579static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, 1580 struct nfs_fh *src_fh, 1581 nfs4_stateid *stateid) 1582{ 1583 return NULL; 1584} 1585#endif /* CONFIG_NFSD_V4_2_INTER_SSC */ 1586 1587static __be32 1588nfsd4_setup_intra_ssc(struct svc_rqst *rqstp, 1589 struct nfsd4_compound_state *cstate, 1590 struct nfsd4_copy *copy) 1591{ 1592 return nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, 1593 ©->nf_src, ©->cp_dst_stateid, 1594 ©->nf_dst); 1595} 1596 1597static void nfsd4_cb_offload_release(struct nfsd4_callback *cb) 1598{ 1599 struct nfsd4_cb_offload *cbo = 1600 container_of(cb, struct nfsd4_cb_offload, co_cb); 1601 1602 kfree(cbo); 1603} 1604 1605static int nfsd4_cb_offload_done(struct nfsd4_callback *cb, 1606 struct rpc_task *task) 1607{ 1608 struct nfsd4_cb_offload *cbo = 1609 container_of(cb, struct nfsd4_cb_offload, co_cb); 1610 1611 trace_nfsd_cb_offload_done(&cbo->co_res.cb_stateid, task); 1612 return 1; 1613} 1614 1615static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = { 1616 .release = nfsd4_cb_offload_release, 1617 .done = nfsd4_cb_offload_done 1618}; 1619 1620static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync) 1621{ 1622 copy->cp_res.wr_stable_how = 1623 test_bit(NFSD4_COPY_F_COMMITTED, ©->cp_flags) ? 1624 NFS_FILE_SYNC : NFS_UNSTABLE; 1625 nfsd4_copy_set_sync(copy, sync); 1626 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net); 1627} 1628 1629static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy, 1630 struct file *dst, 1631 struct file *src) 1632{ 1633 errseq_t since; 1634 ssize_t bytes_copied = 0; 1635 u64 bytes_total = copy->cp_count; 1636 u64 src_pos = copy->cp_src_pos; 1637 u64 dst_pos = copy->cp_dst_pos; 1638 int status; 1639 loff_t end; 1640 1641 /* See RFC 7862 p.67: */ 1642 if (bytes_total == 0) 1643 bytes_total = ULLONG_MAX; 1644 do { 1645 if (kthread_should_stop()) 1646 break; 1647 bytes_copied = nfsd_copy_file_range(src, src_pos, dst, dst_pos, 1648 bytes_total); 1649 if (bytes_copied <= 0) 1650 break; 1651 bytes_total -= bytes_copied; 1652 copy->cp_res.wr_bytes_written += bytes_copied; 1653 src_pos += bytes_copied; 1654 dst_pos += bytes_copied; 1655 } while (bytes_total > 0 && nfsd4_copy_is_async(copy)); 1656 /* for a non-zero asynchronous copy do a commit of data */ 1657 if (nfsd4_copy_is_async(copy) && copy->cp_res.wr_bytes_written > 0) { 1658 since = READ_ONCE(dst->f_wb_err); 1659 end = copy->cp_dst_pos + copy->cp_res.wr_bytes_written - 1; 1660 status = vfs_fsync_range(dst, copy->cp_dst_pos, end, 0); 1661 if (!status) 1662 status = filemap_check_wb_err(dst->f_mapping, since); 1663 if (!status) 1664 set_bit(NFSD4_COPY_F_COMMITTED, ©->cp_flags); 1665 } 1666 return bytes_copied; 1667} 1668 1669static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, 1670 struct file *src, struct file *dst, 1671 bool sync) 1672{ 1673 __be32 status; 1674 ssize_t bytes; 1675 1676 bytes = _nfsd_copy_file_range(copy, dst, src); 1677 1678 /* for async copy, we ignore the error, client can always retry 1679 * to get the error 1680 */ 1681 if (bytes < 0 && !copy->cp_res.wr_bytes_written) 1682 status = nfserrno(bytes); 1683 else { 1684 nfsd4_init_copy_res(copy, sync); 1685 status = nfs_ok; 1686 } 1687 return status; 1688} 1689 1690static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst) 1691{ 1692 dst->cp_src_pos = src->cp_src_pos; 1693 dst->cp_dst_pos = src->cp_dst_pos; 1694 dst->cp_count = src->cp_count; 1695 dst->cp_flags = src->cp_flags; 1696 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res)); 1697 memcpy(&dst->fh, &src->fh, sizeof(src->fh)); 1698 dst->cp_clp = src->cp_clp; 1699 dst->nf_dst = nfsd_file_get(src->nf_dst); 1700 /* for inter, nf_src doesn't exist yet */ 1701 if (!nfsd4_ssc_is_inter(src)) 1702 dst->nf_src = nfsd_file_get(src->nf_src); 1703 1704 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid)); 1705 memcpy(dst->cp_src, src->cp_src, sizeof(struct nl4_server)); 1706 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid)); 1707 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh)); 1708 dst->ss_nsui = src->ss_nsui; 1709} 1710 1711static void release_copy_files(struct nfsd4_copy *copy) 1712{ 1713 if (copy->nf_src) 1714 nfsd_file_put(copy->nf_src); 1715 if (copy->nf_dst) 1716 nfsd_file_put(copy->nf_dst); 1717} 1718 1719static void cleanup_async_copy(struct nfsd4_copy *copy) 1720{ 1721 nfs4_free_copy_state(copy); 1722 release_copy_files(copy); 1723 if (copy->cp_clp) { 1724 spin_lock(©->cp_clp->async_lock); 1725 if (!list_empty(©->copies)) 1726 list_del_init(©->copies); 1727 spin_unlock(©->cp_clp->async_lock); 1728 } 1729 nfs4_put_copy(copy); 1730} 1731 1732static void nfsd4_send_cb_offload(struct nfsd4_copy *copy, __be32 nfserr) 1733{ 1734 struct nfsd4_cb_offload *cbo; 1735 1736 cbo = kzalloc(sizeof(*cbo), GFP_KERNEL); 1737 if (!cbo) 1738 return; 1739 1740 memcpy(&cbo->co_res, ©->cp_res, sizeof(copy->cp_res)); 1741 memcpy(&cbo->co_fh, ©->fh, sizeof(copy->fh)); 1742 cbo->co_nfserr = nfserr; 1743 1744 nfsd4_init_cb(&cbo->co_cb, copy->cp_clp, &nfsd4_cb_offload_ops, 1745 NFSPROC4_CLNT_CB_OFFLOAD); 1746 trace_nfsd_cb_offload(copy->cp_clp, &cbo->co_res.cb_stateid, 1747 &cbo->co_fh, copy->cp_count, nfserr); 1748 nfsd4_run_cb(&cbo->co_cb); 1749} 1750 1751/** 1752 * nfsd4_do_async_copy - kthread function for background server-side COPY 1753 * @data: arguments for COPY operation 1754 * 1755 * Return values: 1756 * %0: Copy operation is done. 1757 */ 1758static int nfsd4_do_async_copy(void *data) 1759{ 1760 struct nfsd4_copy *copy = (struct nfsd4_copy *)data; 1761 __be32 nfserr; 1762 1763 if (nfsd4_ssc_is_inter(copy)) { 1764 struct file *filp; 1765 1766 filp = nfs42_ssc_open(copy->ss_nsui->nsui_vfsmount, 1767 ©->c_fh, ©->stateid); 1768 if (IS_ERR(filp)) { 1769 switch (PTR_ERR(filp)) { 1770 case -EBADF: 1771 nfserr = nfserr_wrong_type; 1772 break; 1773 default: 1774 nfserr = nfserr_offload_denied; 1775 } 1776 /* ss_mnt will be unmounted by the laundromat */ 1777 goto do_callback; 1778 } 1779 nfserr = nfsd4_do_copy(copy, filp, copy->nf_dst->nf_file, 1780 false); 1781 nfsd4_cleanup_inter_ssc(copy->ss_nsui, filp, copy->nf_dst); 1782 } else { 1783 nfserr = nfsd4_do_copy(copy, copy->nf_src->nf_file, 1784 copy->nf_dst->nf_file, false); 1785 } 1786 1787do_callback: 1788 nfsd4_send_cb_offload(copy, nfserr); 1789 cleanup_async_copy(copy); 1790 return 0; 1791} 1792 1793static __be32 1794nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1795 union nfsd4_op_u *u) 1796{ 1797 struct nfsd4_copy *copy = &u->copy; 1798 __be32 status; 1799 struct nfsd4_copy *async_copy = NULL; 1800 1801 if (nfsd4_ssc_is_inter(copy)) { 1802 if (!inter_copy_offload_enable || nfsd4_copy_is_sync(copy)) { 1803 status = nfserr_notsupp; 1804 goto out; 1805 } 1806 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy); 1807 if (status) 1808 return nfserr_offload_denied; 1809 } else { 1810 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy); 1811 if (status) 1812 return status; 1813 } 1814 1815 copy->cp_clp = cstate->clp; 1816 memcpy(©->fh, &cstate->current_fh.fh_handle, 1817 sizeof(struct knfsd_fh)); 1818 if (nfsd4_copy_is_async(copy)) { 1819 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1820 1821 status = nfserrno(-ENOMEM); 1822 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1823 if (!async_copy) 1824 goto out_err; 1825 INIT_LIST_HEAD(&async_copy->copies); 1826 refcount_set(&async_copy->refcount, 1); 1827 async_copy->cp_src = kmalloc(sizeof(*async_copy->cp_src), GFP_KERNEL); 1828 if (!async_copy->cp_src) 1829 goto out_err; 1830 if (!nfs4_init_copy_state(nn, copy)) 1831 goto out_err; 1832 memcpy(©->cp_res.cb_stateid, ©->cp_stateid.cs_stid, 1833 sizeof(copy->cp_res.cb_stateid)); 1834 dup_copy_fields(copy, async_copy); 1835 async_copy->copy_task = kthread_create(nfsd4_do_async_copy, 1836 async_copy, "%s", "copy thread"); 1837 if (IS_ERR(async_copy->copy_task)) 1838 goto out_err; 1839 spin_lock(&async_copy->cp_clp->async_lock); 1840 list_add(&async_copy->copies, 1841 &async_copy->cp_clp->async_copies); 1842 spin_unlock(&async_copy->cp_clp->async_lock); 1843 wake_up_process(async_copy->copy_task); 1844 status = nfs_ok; 1845 } else { 1846 status = nfsd4_do_copy(copy, copy->nf_src->nf_file, 1847 copy->nf_dst->nf_file, true); 1848 } 1849out: 1850 release_copy_files(copy); 1851 return status; 1852out_err: 1853 if (nfsd4_ssc_is_inter(copy)) { 1854 /* 1855 * Source's vfsmount of inter-copy will be unmounted 1856 * by the laundromat. Use copy instead of async_copy 1857 * since async_copy->ss_nsui might not be set yet. 1858 */ 1859 refcount_dec(©->ss_nsui->nsui_refcnt); 1860 } 1861 if (async_copy) 1862 cleanup_async_copy(async_copy); 1863 status = nfserrno(-ENOMEM); 1864 goto out; 1865} 1866 1867static struct nfsd4_copy * 1868find_async_copy_locked(struct nfs4_client *clp, stateid_t *stateid) 1869{ 1870 struct nfsd4_copy *copy; 1871 1872 lockdep_assert_held(&clp->async_lock); 1873 1874 list_for_each_entry(copy, &clp->async_copies, copies) { 1875 if (memcmp(©->cp_stateid.cs_stid, stateid, NFS4_STATEID_SIZE)) 1876 continue; 1877 return copy; 1878 } 1879 return NULL; 1880} 1881 1882static struct nfsd4_copy * 1883find_async_copy(struct nfs4_client *clp, stateid_t *stateid) 1884{ 1885 struct nfsd4_copy *copy; 1886 1887 spin_lock(&clp->async_lock); 1888 copy = find_async_copy_locked(clp, stateid); 1889 if (copy) 1890 refcount_inc(©->refcount); 1891 spin_unlock(&clp->async_lock); 1892 return copy; 1893} 1894 1895static __be32 1896nfsd4_offload_cancel(struct svc_rqst *rqstp, 1897 struct nfsd4_compound_state *cstate, 1898 union nfsd4_op_u *u) 1899{ 1900 struct nfsd4_offload_status *os = &u->offload_status; 1901 struct nfsd4_copy *copy; 1902 struct nfs4_client *clp = cstate->clp; 1903 1904 copy = find_async_copy(clp, &os->stateid); 1905 if (!copy) { 1906 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1907 1908 return manage_cpntf_state(nn, &os->stateid, clp, NULL); 1909 } else 1910 nfsd4_stop_copy(copy); 1911 1912 return nfs_ok; 1913} 1914 1915static __be32 1916nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1917 union nfsd4_op_u *u) 1918{ 1919 struct nfsd4_copy_notify *cn = &u->copy_notify; 1920 __be32 status; 1921 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1922 struct nfs4_stid *stid; 1923 struct nfs4_cpntf_state *cps; 1924 struct nfs4_client *clp = cstate->clp; 1925 1926 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1927 &cn->cpn_src_stateid, RD_STATE, NULL, 1928 &stid); 1929 if (status) 1930 return status; 1931 1932 cn->cpn_sec = nn->nfsd4_lease; 1933 cn->cpn_nsec = 0; 1934 1935 status = nfserrno(-ENOMEM); 1936 cps = nfs4_alloc_init_cpntf_state(nn, stid); 1937 if (!cps) 1938 goto out; 1939 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.cs_stid, sizeof(stateid_t)); 1940 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t)); 1941 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t)); 1942 1943 /* For now, only return one server address in cpn_src, the 1944 * address used by the client to connect to this server. 1945 */ 1946 cn->cpn_src->nl4_type = NL4_NETADDR; 1947 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr, 1948 &cn->cpn_src->u.nl4_addr); 1949 WARN_ON_ONCE(status); 1950 if (status) { 1951 nfs4_put_cpntf_state(nn, cps); 1952 goto out; 1953 } 1954out: 1955 nfs4_put_stid(stid); 1956 return status; 1957} 1958 1959static __be32 1960nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1961 struct nfsd4_fallocate *fallocate, int flags) 1962{ 1963 __be32 status; 1964 struct nfsd_file *nf; 1965 1966 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1967 &fallocate->falloc_stateid, 1968 WR_STATE, &nf, NULL); 1969 if (status != nfs_ok) 1970 return status; 1971 1972 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file, 1973 fallocate->falloc_offset, 1974 fallocate->falloc_length, 1975 flags); 1976 nfsd_file_put(nf); 1977 return status; 1978} 1979 1980static __be32 1981nfsd4_offload_status(struct svc_rqst *rqstp, 1982 struct nfsd4_compound_state *cstate, 1983 union nfsd4_op_u *u) 1984{ 1985 struct nfsd4_offload_status *os = &u->offload_status; 1986 __be32 status = nfs_ok; 1987 struct nfsd4_copy *copy; 1988 struct nfs4_client *clp = cstate->clp; 1989 1990 spin_lock(&clp->async_lock); 1991 copy = find_async_copy_locked(clp, &os->stateid); 1992 if (copy) 1993 os->count = copy->cp_res.wr_bytes_written; 1994 else 1995 status = nfserr_bad_stateid; 1996 spin_unlock(&clp->async_lock); 1997 1998 return status; 1999} 2000 2001static __be32 2002nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2003 union nfsd4_op_u *u) 2004{ 2005 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0); 2006} 2007 2008static __be32 2009nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2010 union nfsd4_op_u *u) 2011{ 2012 return nfsd4_fallocate(rqstp, cstate, &u->deallocate, 2013 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 2014} 2015 2016static __be32 2017nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2018 union nfsd4_op_u *u) 2019{ 2020 struct nfsd4_seek *seek = &u->seek; 2021 int whence; 2022 __be32 status; 2023 struct nfsd_file *nf; 2024 2025 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 2026 &seek->seek_stateid, 2027 RD_STATE, &nf, NULL); 2028 if (status) 2029 return status; 2030 2031 switch (seek->seek_whence) { 2032 case NFS4_CONTENT_DATA: 2033 whence = SEEK_DATA; 2034 break; 2035 case NFS4_CONTENT_HOLE: 2036 whence = SEEK_HOLE; 2037 break; 2038 default: 2039 status = nfserr_union_notsupp; 2040 goto out; 2041 } 2042 2043 /* 2044 * Note: This call does change file->f_pos, but nothing in NFSD 2045 * should ever file->f_pos. 2046 */ 2047 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence); 2048 if (seek->seek_pos < 0) 2049 status = nfserrno(seek->seek_pos); 2050 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file))) 2051 seek->seek_eof = true; 2052 2053out: 2054 nfsd_file_put(nf); 2055 return status; 2056} 2057 2058/* This routine never returns NFS_OK! If there are no other errors, it 2059 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 2060 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 2061 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 2062 */ 2063static __be32 2064_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2065 struct nfsd4_verify *verify) 2066{ 2067 __be32 *buf, *p; 2068 int count; 2069 __be32 status; 2070 2071 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 2072 if (status) 2073 return status; 2074 2075 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 2076 if (status) 2077 return status; 2078 2079 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 2080 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 2081 return nfserr_inval; 2082 if (verify->ve_attrlen & 3) 2083 return nfserr_inval; 2084 2085 /* count in words: 2086 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 2087 */ 2088 count = 4 + (verify->ve_attrlen >> 2); 2089 buf = kmalloc(count << 2, GFP_KERNEL); 2090 if (!buf) 2091 return nfserr_jukebox; 2092 2093 p = buf; 2094 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 2095 cstate->current_fh.fh_export, 2096 cstate->current_fh.fh_dentry, 2097 verify->ve_bmval, 2098 rqstp, 0); 2099 /* 2100 * If nfsd4_encode_fattr() ran out of space, assume that's because 2101 * the attributes are longer (hence different) than those given: 2102 */ 2103 if (status == nfserr_resource) 2104 status = nfserr_not_same; 2105 if (status) 2106 goto out_kfree; 2107 2108 /* skip bitmap */ 2109 p = buf + 1 + ntohl(buf[0]); 2110 status = nfserr_not_same; 2111 if (ntohl(*p++) != verify->ve_attrlen) 2112 goto out_kfree; 2113 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 2114 status = nfserr_same; 2115 2116out_kfree: 2117 kfree(buf); 2118 return status; 2119} 2120 2121static __be32 2122nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2123 union nfsd4_op_u *u) 2124{ 2125 __be32 status; 2126 2127 status = _nfsd4_verify(rqstp, cstate, &u->verify); 2128 return status == nfserr_not_same ? nfs_ok : status; 2129} 2130 2131static __be32 2132nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2133 union nfsd4_op_u *u) 2134{ 2135 __be32 status; 2136 2137 status = _nfsd4_verify(rqstp, cstate, &u->nverify); 2138 return status == nfserr_same ? nfs_ok : status; 2139} 2140 2141#ifdef CONFIG_NFSD_PNFS 2142static const struct nfsd4_layout_ops * 2143nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 2144{ 2145 if (!exp->ex_layout_types) { 2146 dprintk("%s: export does not support pNFS\n", __func__); 2147 return NULL; 2148 } 2149 2150 if (layout_type >= LAYOUT_TYPE_MAX || 2151 !(exp->ex_layout_types & (1 << layout_type))) { 2152 dprintk("%s: layout type %d not supported\n", 2153 __func__, layout_type); 2154 return NULL; 2155 } 2156 2157 return nfsd4_layout_ops[layout_type]; 2158} 2159 2160static __be32 2161nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 2162 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 2163{ 2164 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo; 2165 const struct nfsd4_layout_ops *ops; 2166 struct nfsd4_deviceid_map *map; 2167 struct svc_export *exp; 2168 __be32 nfserr; 2169 2170 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 2171 __func__, 2172 gdp->gd_layout_type, 2173 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 2174 gdp->gd_maxcount); 2175 2176 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 2177 if (!map) { 2178 dprintk("%s: couldn't find device ID to export mapping!\n", 2179 __func__); 2180 return nfserr_noent; 2181 } 2182 2183 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 2184 if (IS_ERR(exp)) { 2185 dprintk("%s: could not find device id\n", __func__); 2186 return nfserr_noent; 2187 } 2188 2189 nfserr = nfserr_layoutunavailable; 2190 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 2191 if (!ops) 2192 goto out; 2193 2194 nfserr = nfs_ok; 2195 if (gdp->gd_maxcount != 0) { 2196 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 2197 rqstp, cstate->clp, gdp); 2198 } 2199 2200 gdp->gd_notify_types &= ops->notify_types; 2201out: 2202 exp_put(exp); 2203 return nfserr; 2204} 2205 2206static void 2207nfsd4_getdeviceinfo_release(union nfsd4_op_u *u) 2208{ 2209 kfree(u->getdeviceinfo.gd_device); 2210} 2211 2212static __be32 2213nfsd4_layoutget(struct svc_rqst *rqstp, 2214 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 2215{ 2216 struct nfsd4_layoutget *lgp = &u->layoutget; 2217 struct svc_fh *current_fh = &cstate->current_fh; 2218 const struct nfsd4_layout_ops *ops; 2219 struct nfs4_layout_stateid *ls; 2220 __be32 nfserr; 2221 int accmode = NFSD_MAY_READ_IF_EXEC; 2222 2223 switch (lgp->lg_seg.iomode) { 2224 case IOMODE_READ: 2225 accmode |= NFSD_MAY_READ; 2226 break; 2227 case IOMODE_RW: 2228 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE; 2229 break; 2230 default: 2231 dprintk("%s: invalid iomode %d\n", 2232 __func__, lgp->lg_seg.iomode); 2233 nfserr = nfserr_badiomode; 2234 goto out; 2235 } 2236 2237 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 2238 if (nfserr) 2239 goto out; 2240 2241 nfserr = nfserr_layoutunavailable; 2242 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 2243 if (!ops) 2244 goto out; 2245 2246 /* 2247 * Verify minlength and range as per RFC5661: 2248 * o If loga_length is less than loga_minlength, 2249 * the metadata server MUST return NFS4ERR_INVAL. 2250 * o If the sum of loga_offset and loga_minlength exceeds 2251 * NFS4_UINT64_MAX, and loga_minlength is not 2252 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 2253 * o If the sum of loga_offset and loga_length exceeds 2254 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 2255 * the error NFS4ERR_INVAL MUST result. 2256 */ 2257 nfserr = nfserr_inval; 2258 if (lgp->lg_seg.length < lgp->lg_minlength || 2259 (lgp->lg_minlength != NFS4_MAX_UINT64 && 2260 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 2261 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 2262 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 2263 goto out; 2264 if (lgp->lg_seg.length == 0) 2265 goto out; 2266 2267 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 2268 true, lgp->lg_layout_type, &ls); 2269 if (nfserr) { 2270 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid); 2271 goto out; 2272 } 2273 2274 nfserr = nfserr_recallconflict; 2275 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 2276 goto out_put_stid; 2277 2278 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 2279 current_fh, lgp); 2280 if (nfserr) 2281 goto out_put_stid; 2282 2283 nfserr = nfsd4_insert_layout(lgp, ls); 2284 2285out_put_stid: 2286 mutex_unlock(&ls->ls_mutex); 2287 nfs4_put_stid(&ls->ls_stid); 2288out: 2289 return nfserr; 2290} 2291 2292static void 2293nfsd4_layoutget_release(union nfsd4_op_u *u) 2294{ 2295 kfree(u->layoutget.lg_content); 2296} 2297 2298static __be32 2299nfsd4_layoutcommit(struct svc_rqst *rqstp, 2300 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 2301{ 2302 struct nfsd4_layoutcommit *lcp = &u->layoutcommit; 2303 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 2304 struct svc_fh *current_fh = &cstate->current_fh; 2305 const struct nfsd4_layout_ops *ops; 2306 loff_t new_size = lcp->lc_last_wr + 1; 2307 struct inode *inode; 2308 struct nfs4_layout_stateid *ls; 2309 __be32 nfserr; 2310 2311 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 2312 if (nfserr) 2313 goto out; 2314 2315 nfserr = nfserr_layoutunavailable; 2316 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 2317 if (!ops) 2318 goto out; 2319 inode = d_inode(current_fh->fh_dentry); 2320 2321 nfserr = nfserr_inval; 2322 if (new_size <= seg->offset) { 2323 dprintk("pnfsd: last write before layout segment\n"); 2324 goto out; 2325 } 2326 if (new_size > seg->offset + seg->length) { 2327 dprintk("pnfsd: last write beyond layout segment\n"); 2328 goto out; 2329 } 2330 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 2331 dprintk("pnfsd: layoutcommit beyond EOF\n"); 2332 goto out; 2333 } 2334 2335 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 2336 false, lcp->lc_layout_type, 2337 &ls); 2338 if (nfserr) { 2339 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid); 2340 /* fixup error code as per RFC5661 */ 2341 if (nfserr == nfserr_bad_stateid) 2342 nfserr = nfserr_badlayout; 2343 goto out; 2344 } 2345 2346 /* LAYOUTCOMMIT does not require any serialization */ 2347 mutex_unlock(&ls->ls_mutex); 2348 2349 if (new_size > i_size_read(inode)) { 2350 lcp->lc_size_chg = 1; 2351 lcp->lc_newsize = new_size; 2352 } else { 2353 lcp->lc_size_chg = 0; 2354 } 2355 2356 nfserr = ops->proc_layoutcommit(inode, lcp); 2357 nfs4_put_stid(&ls->ls_stid); 2358out: 2359 return nfserr; 2360} 2361 2362static __be32 2363nfsd4_layoutreturn(struct svc_rqst *rqstp, 2364 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 2365{ 2366 struct nfsd4_layoutreturn *lrp = &u->layoutreturn; 2367 struct svc_fh *current_fh = &cstate->current_fh; 2368 __be32 nfserr; 2369 2370 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 2371 if (nfserr) 2372 goto out; 2373 2374 nfserr = nfserr_layoutunavailable; 2375 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 2376 goto out; 2377 2378 switch (lrp->lr_seg.iomode) { 2379 case IOMODE_READ: 2380 case IOMODE_RW: 2381 case IOMODE_ANY: 2382 break; 2383 default: 2384 dprintk("%s: invalid iomode %d\n", __func__, 2385 lrp->lr_seg.iomode); 2386 nfserr = nfserr_inval; 2387 goto out; 2388 } 2389 2390 switch (lrp->lr_return_type) { 2391 case RETURN_FILE: 2392 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 2393 break; 2394 case RETURN_FSID: 2395 case RETURN_ALL: 2396 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 2397 break; 2398 default: 2399 dprintk("%s: invalid return_type %d\n", __func__, 2400 lrp->lr_return_type); 2401 nfserr = nfserr_inval; 2402 break; 2403 } 2404out: 2405 return nfserr; 2406} 2407#endif /* CONFIG_NFSD_PNFS */ 2408 2409static __be32 2410nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2411 union nfsd4_op_u *u) 2412{ 2413 struct nfsd4_getxattr *getxattr = &u->getxattr; 2414 2415 return nfsd_getxattr(rqstp, &cstate->current_fh, 2416 getxattr->getxa_name, &getxattr->getxa_buf, 2417 &getxattr->getxa_len); 2418} 2419 2420static __be32 2421nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2422 union nfsd4_op_u *u) 2423{ 2424 struct nfsd4_setxattr *setxattr = &u->setxattr; 2425 __be32 ret; 2426 2427 if (opens_in_grace(SVC_NET(rqstp))) 2428 return nfserr_grace; 2429 2430 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name, 2431 setxattr->setxa_buf, setxattr->setxa_len, 2432 setxattr->setxa_flags); 2433 2434 if (!ret) 2435 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh); 2436 2437 return ret; 2438} 2439 2440static __be32 2441nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2442 union nfsd4_op_u *u) 2443{ 2444 /* 2445 * Get the entire list, then copy out only the user attributes 2446 * in the encode function. 2447 */ 2448 return nfsd_listxattr(rqstp, &cstate->current_fh, 2449 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len); 2450} 2451 2452static __be32 2453nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2454 union nfsd4_op_u *u) 2455{ 2456 struct nfsd4_removexattr *removexattr = &u->removexattr; 2457 __be32 ret; 2458 2459 if (opens_in_grace(SVC_NET(rqstp))) 2460 return nfserr_grace; 2461 2462 ret = nfsd_removexattr(rqstp, &cstate->current_fh, 2463 removexattr->rmxa_name); 2464 2465 if (!ret) 2466 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh); 2467 2468 return ret; 2469} 2470 2471/* 2472 * NULL call. 2473 */ 2474static __be32 2475nfsd4_proc_null(struct svc_rqst *rqstp) 2476{ 2477 return rpc_success; 2478} 2479 2480static inline void nfsd4_increment_op_stats(u32 opnum) 2481{ 2482 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 2483 percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_NFS4_OP(opnum)]); 2484} 2485 2486static const struct nfsd4_operation nfsd4_ops[]; 2487 2488static const char *nfsd4_op_name(unsigned opnum); 2489 2490/* 2491 * Enforce NFSv4.1 COMPOUND ordering rules: 2492 * 2493 * Also note, enforced elsewhere: 2494 * - SEQUENCE other than as first op results in 2495 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 2496 * - BIND_CONN_TO_SESSION must be the only op in its compound. 2497 * (Enforced in nfsd4_bind_conn_to_session().) 2498 * - DESTROY_SESSION must be the final operation in a compound, if 2499 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 2500 * (Enforced in nfsd4_destroy_session().) 2501 */ 2502static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 2503{ 2504 struct nfsd4_op *first_op = &args->ops[0]; 2505 2506 /* These ordering requirements don't apply to NFSv4.0: */ 2507 if (args->minorversion == 0) 2508 return nfs_ok; 2509 /* This is weird, but OK, not our problem: */ 2510 if (args->opcnt == 0) 2511 return nfs_ok; 2512 if (first_op->status == nfserr_op_illegal) 2513 return nfs_ok; 2514 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 2515 return nfserr_op_not_in_session; 2516 if (first_op->opnum == OP_SEQUENCE) 2517 return nfs_ok; 2518 /* 2519 * So first_op is something allowed outside a session, like 2520 * EXCHANGE_ID; but then it has to be the only op in the 2521 * compound: 2522 */ 2523 if (args->opcnt != 1) 2524 return nfserr_not_only_op; 2525 return nfs_ok; 2526} 2527 2528const struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 2529{ 2530 return &nfsd4_ops[op->opnum]; 2531} 2532 2533bool nfsd4_cache_this_op(struct nfsd4_op *op) 2534{ 2535 if (op->opnum == OP_ILLEGAL) 2536 return false; 2537 return OPDESC(op)->op_flags & OP_CACHEME; 2538} 2539 2540static bool need_wrongsec_check(struct svc_rqst *rqstp) 2541{ 2542 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2543 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2544 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2545 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 2546 const struct nfsd4_operation *thisd = OPDESC(this); 2547 const struct nfsd4_operation *nextd; 2548 2549 /* 2550 * Most ops check wronsec on our own; only the putfh-like ops 2551 * have special rules. 2552 */ 2553 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 2554 return false; 2555 /* 2556 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 2557 * put-filehandle operation if we're not going to use the 2558 * result: 2559 */ 2560 if (argp->opcnt == resp->opcnt) 2561 return false; 2562 if (next->opnum == OP_ILLEGAL) 2563 return false; 2564 nextd = OPDESC(next); 2565 /* 2566 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 2567 * errors themselves as necessary; others should check for them 2568 * now: 2569 */ 2570 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 2571} 2572 2573#ifdef CONFIG_NFSD_V4_2_INTER_SSC 2574static void 2575check_if_stalefh_allowed(struct nfsd4_compoundargs *args) 2576{ 2577 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL; 2578 struct nfsd4_copy *copy; 2579 struct nfsd4_putfh *putfh; 2580 int i; 2581 2582 /* traverse all operation and if it's a COPY compound, mark the 2583 * source filehandle to skip verification 2584 */ 2585 for (i = 0; i < args->opcnt; i++) { 2586 op = &args->ops[i]; 2587 if (op->opnum == OP_PUTFH) 2588 current_op = op; 2589 else if (op->opnum == OP_SAVEFH) 2590 saved_op = current_op; 2591 else if (op->opnum == OP_RESTOREFH) 2592 current_op = saved_op; 2593 else if (op->opnum == OP_COPY) { 2594 copy = (struct nfsd4_copy *)&op->u; 2595 if (!saved_op) { 2596 op->status = nfserr_nofilehandle; 2597 return; 2598 } 2599 putfh = (struct nfsd4_putfh *)&saved_op->u; 2600 if (nfsd4_ssc_is_inter(copy)) 2601 putfh->no_verify = true; 2602 } 2603 } 2604} 2605#else 2606static void 2607check_if_stalefh_allowed(struct nfsd4_compoundargs *args) 2608{ 2609} 2610#endif 2611 2612/* 2613 * COMPOUND call. 2614 */ 2615static __be32 2616nfsd4_proc_compound(struct svc_rqst *rqstp) 2617{ 2618 struct nfsd4_compoundargs *args = rqstp->rq_argp; 2619 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2620 struct nfsd4_op *op; 2621 struct nfsd4_compound_state *cstate = &resp->cstate; 2622 struct svc_fh *current_fh = &cstate->current_fh; 2623 struct svc_fh *save_fh = &cstate->save_fh; 2624 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2625 __be32 status; 2626 2627 resp->xdr = &rqstp->rq_res_stream; 2628 resp->statusp = resp->xdr->p; 2629 2630 /* reserve space for: NFS status code */ 2631 xdr_reserve_space(resp->xdr, XDR_UNIT); 2632 2633 /* reserve space for: taglen, tag, and opcnt */ 2634 xdr_reserve_space(resp->xdr, XDR_UNIT * 2 + args->taglen); 2635 resp->taglen = args->taglen; 2636 resp->tag = args->tag; 2637 resp->rqstp = rqstp; 2638 cstate->minorversion = args->minorversion; 2639 fh_init(current_fh, NFS4_FHSIZE); 2640 fh_init(save_fh, NFS4_FHSIZE); 2641 /* 2642 * Don't use the deferral mechanism for NFSv4; compounds make it 2643 * too hard to avoid non-idempotency problems. 2644 */ 2645 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2646 2647 /* 2648 * According to RFC3010, this takes precedence over all other errors. 2649 */ 2650 status = nfserr_minor_vers_mismatch; 2651 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0) 2652 goto out; 2653 2654 status = nfs41_check_op_ordering(args); 2655 if (status) { 2656 op = &args->ops[0]; 2657 op->status = status; 2658 resp->opcnt = 1; 2659 goto encode_op; 2660 } 2661 check_if_stalefh_allowed(args); 2662 2663 rqstp->rq_lease_breaker = (void **)&cstate->clp; 2664 2665 trace_nfsd_compound(rqstp, args->tag, args->taglen, args->client_opcnt); 2666 while (!status && resp->opcnt < args->opcnt) { 2667 op = &args->ops[resp->opcnt++]; 2668 2669 if (unlikely(resp->opcnt == NFSD_MAX_OPS_PER_COMPOUND)) { 2670 /* If there are still more operations to process, 2671 * stop here and report NFS4ERR_RESOURCE. */ 2672 if (cstate->minorversion == 0 && 2673 args->client_opcnt > resp->opcnt) { 2674 op->status = nfserr_resource; 2675 goto encode_op; 2676 } 2677 } 2678 2679 /* 2680 * The XDR decode routines may have pre-set op->status; 2681 * for example, if there is a miscellaneous XDR error 2682 * it will be set to nfserr_bad_xdr. 2683 */ 2684 if (op->status) { 2685 if (op->opnum == OP_OPEN) 2686 op->status = nfsd4_open_omfg(rqstp, cstate, op); 2687 goto encode_op; 2688 } 2689 if (!current_fh->fh_dentry && 2690 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) { 2691 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 2692 op->status = nfserr_nofilehandle; 2693 goto encode_op; 2694 } 2695 } else if (current_fh->fh_export && 2696 current_fh->fh_export->ex_fslocs.migrated && 2697 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 2698 op->status = nfserr_moved; 2699 goto encode_op; 2700 } 2701 2702 fh_clear_pre_post_attrs(current_fh); 2703 2704 /* If op is non-idempotent */ 2705 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) { 2706 /* 2707 * Don't execute this op if we couldn't encode a 2708 * successful reply: 2709 */ 2710 u32 plen = op->opdesc->op_rsize_bop(rqstp, op); 2711 /* 2712 * Plus if there's another operation, make sure 2713 * we'll have space to at least encode an error: 2714 */ 2715 if (resp->opcnt < args->opcnt) 2716 plen += COMPOUND_ERR_SLACK_SPACE; 2717 op->status = nfsd4_check_resp_size(resp, plen); 2718 } 2719 2720 if (op->status) 2721 goto encode_op; 2722 2723 if (op->opdesc->op_get_currentstateid) 2724 op->opdesc->op_get_currentstateid(cstate, &op->u); 2725 op->status = op->opdesc->op_func(rqstp, cstate, &op->u); 2726 2727 /* Only from SEQUENCE */ 2728 if (cstate->status == nfserr_replay_cache) { 2729 dprintk("%s NFS4.1 replay from cache\n", __func__); 2730 status = op->status; 2731 goto out; 2732 } 2733 if (!op->status) { 2734 if (op->opdesc->op_set_currentstateid) 2735 op->opdesc->op_set_currentstateid(cstate, &op->u); 2736 2737 if (op->opdesc->op_flags & OP_CLEAR_STATEID) 2738 clear_current_stateid(cstate); 2739 2740 if (current_fh->fh_export && 2741 need_wrongsec_check(rqstp)) 2742 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 2743 } 2744encode_op: 2745 if (op->status == nfserr_replay_me) { 2746 op->replay = &cstate->replay_owner->so_replay; 2747 nfsd4_encode_replay(resp->xdr, op); 2748 status = op->status = op->replay->rp_status; 2749 } else { 2750 nfsd4_encode_operation(resp, op); 2751 status = op->status; 2752 } 2753 2754 trace_nfsd_compound_status(args->client_opcnt, resp->opcnt, 2755 status, nfsd4_op_name(op->opnum)); 2756 2757 nfsd4_cstate_clear_replay(cstate); 2758 nfsd4_increment_op_stats(op->opnum); 2759 } 2760 2761 fh_put(current_fh); 2762 fh_put(save_fh); 2763 BUG_ON(cstate->replay_owner); 2764out: 2765 cstate->status = status; 2766 /* Reset deferral mechanism for RPC deferrals */ 2767 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2768 return rpc_success; 2769} 2770 2771#define op_encode_hdr_size (2) 2772#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 2773#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 2774#define op_encode_change_info_maxsz (5) 2775#define nfs4_fattr_bitmap_maxsz (4) 2776 2777/* We'll fall back on returning no lockowner if run out of space: */ 2778#define op_encode_lockowner_maxsz (0) 2779#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 2780 2781#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 2782 2783#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 2784#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 2785 op_encode_ace_maxsz) 2786 2787#define op_encode_channel_attrs_maxsz (6 + 1 + 1) 2788 2789/* 2790 * The _rsize() helpers are invoked by the NFSv4 COMPOUND decoder, which 2791 * is called before sunrpc sets rq_res.buflen. Thus we have to compute 2792 * the maximum payload size here, based on transport limits and the size 2793 * of the remaining space in the rq_pages array. 2794 */ 2795static u32 nfsd4_max_payload(const struct svc_rqst *rqstp) 2796{ 2797 u32 buflen; 2798 2799 buflen = (rqstp->rq_page_end - rqstp->rq_next_page) * PAGE_SIZE; 2800 buflen -= rqstp->rq_auth_slack; 2801 buflen -= rqstp->rq_res.head[0].iov_len; 2802 return min_t(u32, buflen, svc_max_payload(rqstp)); 2803} 2804 2805static u32 nfsd4_only_status_rsize(const struct svc_rqst *rqstp, 2806 const struct nfsd4_op *op) 2807{ 2808 return (op_encode_hdr_size) * sizeof(__be32); 2809} 2810 2811static u32 nfsd4_status_stateid_rsize(const struct svc_rqst *rqstp, 2812 const struct nfsd4_op *op) 2813{ 2814 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 2815} 2816 2817static u32 nfsd4_access_rsize(const struct svc_rqst *rqstp, 2818 const struct nfsd4_op *op) 2819{ 2820 /* ac_supported, ac_resp_access */ 2821 return (op_encode_hdr_size + 2)* sizeof(__be32); 2822} 2823 2824static u32 nfsd4_commit_rsize(const struct svc_rqst *rqstp, 2825 const struct nfsd4_op *op) 2826{ 2827 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 2828} 2829 2830static u32 nfsd4_create_rsize(const struct svc_rqst *rqstp, 2831 const struct nfsd4_op *op) 2832{ 2833 return (op_encode_hdr_size + op_encode_change_info_maxsz 2834 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2835} 2836 2837/* 2838 * Note since this is an idempotent operation we won't insist on failing 2839 * the op prematurely if the estimate is too large. We may turn off splice 2840 * reads unnecessarily. 2841 */ 2842static u32 nfsd4_getattr_rsize(const struct svc_rqst *rqstp, 2843 const struct nfsd4_op *op) 2844{ 2845 const u32 *bmap = op->u.getattr.ga_bmval; 2846 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 2847 u32 ret = 0; 2848 2849 if (bmap0 & FATTR4_WORD0_ACL) 2850 return nfsd4_max_payload(rqstp); 2851 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 2852 return nfsd4_max_payload(rqstp); 2853 2854 if (bmap1 & FATTR4_WORD1_OWNER) { 2855 ret += IDMAP_NAMESZ + 4; 2856 bmap1 &= ~FATTR4_WORD1_OWNER; 2857 } 2858 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 2859 ret += IDMAP_NAMESZ + 4; 2860 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 2861 } 2862 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 2863 ret += NFS4_FHSIZE + 4; 2864 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 2865 } 2866 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 2867 ret += NFS4_MAXLABELLEN + 12; 2868 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2869 } 2870 /* 2871 * Largest of remaining attributes are 16 bytes (e.g., 2872 * supported_attributes) 2873 */ 2874 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 2875 /* bitmask, length */ 2876 ret += 20; 2877 return ret; 2878} 2879 2880static u32 nfsd4_getfh_rsize(const struct svc_rqst *rqstp, 2881 const struct nfsd4_op *op) 2882{ 2883 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE; 2884} 2885 2886static u32 nfsd4_link_rsize(const struct svc_rqst *rqstp, 2887 const struct nfsd4_op *op) 2888{ 2889 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2890 * sizeof(__be32); 2891} 2892 2893static u32 nfsd4_lock_rsize(const struct svc_rqst *rqstp, 2894 const struct nfsd4_op *op) 2895{ 2896 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 2897 * sizeof(__be32); 2898} 2899 2900static u32 nfsd4_open_rsize(const struct svc_rqst *rqstp, 2901 const struct nfsd4_op *op) 2902{ 2903 return (op_encode_hdr_size + op_encode_stateid_maxsz 2904 + op_encode_change_info_maxsz + 1 2905 + nfs4_fattr_bitmap_maxsz 2906 + op_encode_delegation_maxsz) * sizeof(__be32); 2907} 2908 2909static u32 nfsd4_read_rsize(const struct svc_rqst *rqstp, 2910 const struct nfsd4_op *op) 2911{ 2912 u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp)); 2913 2914 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2915} 2916 2917static u32 nfsd4_read_plus_rsize(const struct svc_rqst *rqstp, 2918 const struct nfsd4_op *op) 2919{ 2920 u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp)); 2921 /* 2922 * If we detect that the file changed during hole encoding, then we 2923 * recover by encoding the remaining reply as data. This means we need 2924 * to set aside enough room to encode two data segments. 2925 */ 2926 u32 seg_len = 2 * (1 + 2 + 1); 2927 2928 return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32); 2929} 2930 2931static u32 nfsd4_readdir_rsize(const struct svc_rqst *rqstp, 2932 const struct nfsd4_op *op) 2933{ 2934 u32 rlen = min(op->u.readdir.rd_maxcount, nfsd4_max_payload(rqstp)); 2935 2936 return (op_encode_hdr_size + op_encode_verifier_maxsz + 2937 XDR_QUADLEN(rlen)) * sizeof(__be32); 2938} 2939 2940static u32 nfsd4_readlink_rsize(const struct svc_rqst *rqstp, 2941 const struct nfsd4_op *op) 2942{ 2943 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE; 2944} 2945 2946static u32 nfsd4_remove_rsize(const struct svc_rqst *rqstp, 2947 const struct nfsd4_op *op) 2948{ 2949 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2950 * sizeof(__be32); 2951} 2952 2953static u32 nfsd4_rename_rsize(const struct svc_rqst *rqstp, 2954 const struct nfsd4_op *op) 2955{ 2956 return (op_encode_hdr_size + op_encode_change_info_maxsz 2957 + op_encode_change_info_maxsz) * sizeof(__be32); 2958} 2959 2960static u32 nfsd4_sequence_rsize(const struct svc_rqst *rqstp, 2961 const struct nfsd4_op *op) 2962{ 2963 return (op_encode_hdr_size 2964 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 2965} 2966 2967static u32 nfsd4_test_stateid_rsize(const struct svc_rqst *rqstp, 2968 const struct nfsd4_op *op) 2969{ 2970 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids) 2971 * sizeof(__be32); 2972} 2973 2974static u32 nfsd4_setattr_rsize(const struct svc_rqst *rqstp, 2975 const struct nfsd4_op *op) 2976{ 2977 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2978} 2979 2980static u32 nfsd4_secinfo_rsize(const struct svc_rqst *rqstp, 2981 const struct nfsd4_op *op) 2982{ 2983 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR * 2984 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32); 2985} 2986 2987static u32 nfsd4_setclientid_rsize(const struct svc_rqst *rqstp, 2988 const struct nfsd4_op *op) 2989{ 2990 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 2991 sizeof(__be32); 2992} 2993 2994static u32 nfsd4_write_rsize(const struct svc_rqst *rqstp, 2995 const struct nfsd4_op *op) 2996{ 2997 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 2998} 2999 3000static u32 nfsd4_exchange_id_rsize(const struct svc_rqst *rqstp, 3001 const struct nfsd4_op *op) 3002{ 3003 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 3004 1 + 1 + /* eir_flags, spr_how */\ 3005 4 + /* spo_must_enforce & _allow with bitmap */\ 3006 2 + /*eir_server_owner.so_minor_id */\ 3007 /* eir_server_owner.so_major_id<> */\ 3008 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 3009 /* eir_server_scope<> */\ 3010 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 3011 1 + /* eir_server_impl_id array length */\ 3012 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 3013} 3014 3015static u32 nfsd4_bind_conn_to_session_rsize(const struct svc_rqst *rqstp, 3016 const struct nfsd4_op *op) 3017{ 3018 return (op_encode_hdr_size + \ 3019 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 3020 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 3021} 3022 3023static u32 nfsd4_create_session_rsize(const struct svc_rqst *rqstp, 3024 const struct nfsd4_op *op) 3025{ 3026 return (op_encode_hdr_size + \ 3027 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 3028 2 + /* csr_sequence, csr_flags */\ 3029 op_encode_channel_attrs_maxsz + \ 3030 op_encode_channel_attrs_maxsz) * sizeof(__be32); 3031} 3032 3033static u32 nfsd4_copy_rsize(const struct svc_rqst *rqstp, 3034 const struct nfsd4_op *op) 3035{ 3036 return (op_encode_hdr_size + 3037 1 /* wr_callback */ + 3038 op_encode_stateid_maxsz /* wr_callback */ + 3039 2 /* wr_count */ + 3040 1 /* wr_committed */ + 3041 op_encode_verifier_maxsz + 3042 1 /* cr_consecutive */ + 3043 1 /* cr_synchronous */) * sizeof(__be32); 3044} 3045 3046static u32 nfsd4_offload_status_rsize(const struct svc_rqst *rqstp, 3047 const struct nfsd4_op *op) 3048{ 3049 return (op_encode_hdr_size + 3050 2 /* osr_count */ + 3051 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32); 3052} 3053 3054static u32 nfsd4_copy_notify_rsize(const struct svc_rqst *rqstp, 3055 const struct nfsd4_op *op) 3056{ 3057 return (op_encode_hdr_size + 3058 3 /* cnr_lease_time */ + 3059 1 /* We support one cnr_source_server */ + 3060 1 /* cnr_stateid seq */ + 3061 op_encode_stateid_maxsz /* cnr_stateid */ + 3062 1 /* num cnr_source_server*/ + 3063 1 /* nl4_type */ + 3064 1 /* nl4 size */ + 3065 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */) 3066 * sizeof(__be32); 3067} 3068 3069#ifdef CONFIG_NFSD_PNFS 3070static u32 nfsd4_getdeviceinfo_rsize(const struct svc_rqst *rqstp, 3071 const struct nfsd4_op *op) 3072{ 3073 u32 rlen = min(op->u.getdeviceinfo.gd_maxcount, nfsd4_max_payload(rqstp)); 3074 3075 return (op_encode_hdr_size + 3076 1 /* gd_layout_type*/ + 3077 XDR_QUADLEN(rlen) + 3078 2 /* gd_notify_types */) * sizeof(__be32); 3079} 3080 3081/* 3082 * At this stage we don't really know what layout driver will handle the request, 3083 * so we need to define an arbitrary upper bound here. 3084 */ 3085#define MAX_LAYOUT_SIZE 128 3086static u32 nfsd4_layoutget_rsize(const struct svc_rqst *rqstp, 3087 const struct nfsd4_op *op) 3088{ 3089 return (op_encode_hdr_size + 3090 1 /* logr_return_on_close */ + 3091 op_encode_stateid_maxsz + 3092 1 /* nr of layouts */ + 3093 MAX_LAYOUT_SIZE) * sizeof(__be32); 3094} 3095 3096static u32 nfsd4_layoutcommit_rsize(const struct svc_rqst *rqstp, 3097 const struct nfsd4_op *op) 3098{ 3099 return (op_encode_hdr_size + 3100 1 /* locr_newsize */ + 3101 2 /* ns_size */) * sizeof(__be32); 3102} 3103 3104static u32 nfsd4_layoutreturn_rsize(const struct svc_rqst *rqstp, 3105 const struct nfsd4_op *op) 3106{ 3107 return (op_encode_hdr_size + 3108 1 /* lrs_stateid */ + 3109 op_encode_stateid_maxsz) * sizeof(__be32); 3110} 3111#endif /* CONFIG_NFSD_PNFS */ 3112 3113 3114static u32 nfsd4_seek_rsize(const struct svc_rqst *rqstp, 3115 const struct nfsd4_op *op) 3116{ 3117 return (op_encode_hdr_size + 3) * sizeof(__be32); 3118} 3119 3120static u32 nfsd4_getxattr_rsize(const struct svc_rqst *rqstp, 3121 const struct nfsd4_op *op) 3122{ 3123 u32 rlen = min_t(u32, XATTR_SIZE_MAX, nfsd4_max_payload(rqstp)); 3124 3125 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32); 3126} 3127 3128static u32 nfsd4_setxattr_rsize(const struct svc_rqst *rqstp, 3129 const struct nfsd4_op *op) 3130{ 3131 return (op_encode_hdr_size + op_encode_change_info_maxsz) 3132 * sizeof(__be32); 3133} 3134static u32 nfsd4_listxattrs_rsize(const struct svc_rqst *rqstp, 3135 const struct nfsd4_op *op) 3136{ 3137 u32 rlen = min(op->u.listxattrs.lsxa_maxcount, nfsd4_max_payload(rqstp)); 3138 3139 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32); 3140} 3141 3142static u32 nfsd4_removexattr_rsize(const struct svc_rqst *rqstp, 3143 const struct nfsd4_op *op) 3144{ 3145 return (op_encode_hdr_size + op_encode_change_info_maxsz) 3146 * sizeof(__be32); 3147} 3148 3149 3150static const struct nfsd4_operation nfsd4_ops[] = { 3151 [OP_ACCESS] = { 3152 .op_func = nfsd4_access, 3153 .op_name = "OP_ACCESS", 3154 .op_rsize_bop = nfsd4_access_rsize, 3155 }, 3156 [OP_CLOSE] = { 3157 .op_func = nfsd4_close, 3158 .op_flags = OP_MODIFIES_SOMETHING, 3159 .op_name = "OP_CLOSE", 3160 .op_rsize_bop = nfsd4_status_stateid_rsize, 3161 .op_get_currentstateid = nfsd4_get_closestateid, 3162 .op_set_currentstateid = nfsd4_set_closestateid, 3163 }, 3164 [OP_COMMIT] = { 3165 .op_func = nfsd4_commit, 3166 .op_flags = OP_MODIFIES_SOMETHING, 3167 .op_name = "OP_COMMIT", 3168 .op_rsize_bop = nfsd4_commit_rsize, 3169 }, 3170 [OP_CREATE] = { 3171 .op_func = nfsd4_create, 3172 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 3173 .op_name = "OP_CREATE", 3174 .op_rsize_bop = nfsd4_create_rsize, 3175 }, 3176 [OP_DELEGRETURN] = { 3177 .op_func = nfsd4_delegreturn, 3178 .op_flags = OP_MODIFIES_SOMETHING, 3179 .op_name = "OP_DELEGRETURN", 3180 .op_rsize_bop = nfsd4_only_status_rsize, 3181 .op_get_currentstateid = nfsd4_get_delegreturnstateid, 3182 }, 3183 [OP_GETATTR] = { 3184 .op_func = nfsd4_getattr, 3185 .op_flags = ALLOWED_ON_ABSENT_FS, 3186 .op_rsize_bop = nfsd4_getattr_rsize, 3187 .op_name = "OP_GETATTR", 3188 }, 3189 [OP_GETFH] = { 3190 .op_func = nfsd4_getfh, 3191 .op_name = "OP_GETFH", 3192 .op_rsize_bop = nfsd4_getfh_rsize, 3193 }, 3194 [OP_LINK] = { 3195 .op_func = nfsd4_link, 3196 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 3197 | OP_CACHEME, 3198 .op_name = "OP_LINK", 3199 .op_rsize_bop = nfsd4_link_rsize, 3200 }, 3201 [OP_LOCK] = { 3202 .op_func = nfsd4_lock, 3203 .op_flags = OP_MODIFIES_SOMETHING | 3204 OP_NONTRIVIAL_ERROR_ENCODE, 3205 .op_name = "OP_LOCK", 3206 .op_rsize_bop = nfsd4_lock_rsize, 3207 .op_set_currentstateid = nfsd4_set_lockstateid, 3208 }, 3209 [OP_LOCKT] = { 3210 .op_func = nfsd4_lockt, 3211 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE, 3212 .op_name = "OP_LOCKT", 3213 .op_rsize_bop = nfsd4_lock_rsize, 3214 }, 3215 [OP_LOCKU] = { 3216 .op_func = nfsd4_locku, 3217 .op_flags = OP_MODIFIES_SOMETHING, 3218 .op_name = "OP_LOCKU", 3219 .op_rsize_bop = nfsd4_status_stateid_rsize, 3220 .op_get_currentstateid = nfsd4_get_lockustateid, 3221 }, 3222 [OP_LOOKUP] = { 3223 .op_func = nfsd4_lookup, 3224 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 3225 .op_name = "OP_LOOKUP", 3226 .op_rsize_bop = nfsd4_only_status_rsize, 3227 }, 3228 [OP_LOOKUPP] = { 3229 .op_func = nfsd4_lookupp, 3230 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 3231 .op_name = "OP_LOOKUPP", 3232 .op_rsize_bop = nfsd4_only_status_rsize, 3233 }, 3234 [OP_NVERIFY] = { 3235 .op_func = nfsd4_nverify, 3236 .op_name = "OP_NVERIFY", 3237 .op_rsize_bop = nfsd4_only_status_rsize, 3238 }, 3239 [OP_OPEN] = { 3240 .op_func = nfsd4_open, 3241 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 3242 .op_name = "OP_OPEN", 3243 .op_rsize_bop = nfsd4_open_rsize, 3244 .op_set_currentstateid = nfsd4_set_openstateid, 3245 }, 3246 [OP_OPEN_CONFIRM] = { 3247 .op_func = nfsd4_open_confirm, 3248 .op_flags = OP_MODIFIES_SOMETHING, 3249 .op_name = "OP_OPEN_CONFIRM", 3250 .op_rsize_bop = nfsd4_status_stateid_rsize, 3251 }, 3252 [OP_OPEN_DOWNGRADE] = { 3253 .op_func = nfsd4_open_downgrade, 3254 .op_flags = OP_MODIFIES_SOMETHING, 3255 .op_name = "OP_OPEN_DOWNGRADE", 3256 .op_rsize_bop = nfsd4_status_stateid_rsize, 3257 .op_get_currentstateid = nfsd4_get_opendowngradestateid, 3258 .op_set_currentstateid = nfsd4_set_opendowngradestateid, 3259 }, 3260 [OP_PUTFH] = { 3261 .op_func = nfsd4_putfh, 3262 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3263 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 3264 .op_name = "OP_PUTFH", 3265 .op_rsize_bop = nfsd4_only_status_rsize, 3266 }, 3267 [OP_PUTPUBFH] = { 3268 .op_func = nfsd4_putrootfh, 3269 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3270 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 3271 .op_name = "OP_PUTPUBFH", 3272 .op_rsize_bop = nfsd4_only_status_rsize, 3273 }, 3274 [OP_PUTROOTFH] = { 3275 .op_func = nfsd4_putrootfh, 3276 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3277 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 3278 .op_name = "OP_PUTROOTFH", 3279 .op_rsize_bop = nfsd4_only_status_rsize, 3280 }, 3281 [OP_READ] = { 3282 .op_func = nfsd4_read, 3283 .op_release = nfsd4_read_release, 3284 .op_name = "OP_READ", 3285 .op_rsize_bop = nfsd4_read_rsize, 3286 .op_get_currentstateid = nfsd4_get_readstateid, 3287 }, 3288 [OP_READDIR] = { 3289 .op_func = nfsd4_readdir, 3290 .op_name = "OP_READDIR", 3291 .op_rsize_bop = nfsd4_readdir_rsize, 3292 }, 3293 [OP_READLINK] = { 3294 .op_func = nfsd4_readlink, 3295 .op_name = "OP_READLINK", 3296 .op_rsize_bop = nfsd4_readlink_rsize, 3297 }, 3298 [OP_REMOVE] = { 3299 .op_func = nfsd4_remove, 3300 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3301 .op_name = "OP_REMOVE", 3302 .op_rsize_bop = nfsd4_remove_rsize, 3303 }, 3304 [OP_RENAME] = { 3305 .op_func = nfsd4_rename, 3306 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3307 .op_name = "OP_RENAME", 3308 .op_rsize_bop = nfsd4_rename_rsize, 3309 }, 3310 [OP_RENEW] = { 3311 .op_func = nfsd4_renew, 3312 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3313 | OP_MODIFIES_SOMETHING, 3314 .op_name = "OP_RENEW", 3315 .op_rsize_bop = nfsd4_only_status_rsize, 3316 3317 }, 3318 [OP_RESTOREFH] = { 3319 .op_func = nfsd4_restorefh, 3320 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3321 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 3322 .op_name = "OP_RESTOREFH", 3323 .op_rsize_bop = nfsd4_only_status_rsize, 3324 }, 3325 [OP_SAVEFH] = { 3326 .op_func = nfsd4_savefh, 3327 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 3328 .op_name = "OP_SAVEFH", 3329 .op_rsize_bop = nfsd4_only_status_rsize, 3330 }, 3331 [OP_SECINFO] = { 3332 .op_func = nfsd4_secinfo, 3333 .op_release = nfsd4_secinfo_release, 3334 .op_flags = OP_HANDLES_WRONGSEC, 3335 .op_name = "OP_SECINFO", 3336 .op_rsize_bop = nfsd4_secinfo_rsize, 3337 }, 3338 [OP_SETATTR] = { 3339 .op_func = nfsd4_setattr, 3340 .op_name = "OP_SETATTR", 3341 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME 3342 | OP_NONTRIVIAL_ERROR_ENCODE, 3343 .op_rsize_bop = nfsd4_setattr_rsize, 3344 .op_get_currentstateid = nfsd4_get_setattrstateid, 3345 }, 3346 [OP_SETCLIENTID] = { 3347 .op_func = nfsd4_setclientid, 3348 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3349 | OP_MODIFIES_SOMETHING | OP_CACHEME 3350 | OP_NONTRIVIAL_ERROR_ENCODE, 3351 .op_name = "OP_SETCLIENTID", 3352 .op_rsize_bop = nfsd4_setclientid_rsize, 3353 }, 3354 [OP_SETCLIENTID_CONFIRM] = { 3355 .op_func = nfsd4_setclientid_confirm, 3356 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3357 | OP_MODIFIES_SOMETHING | OP_CACHEME, 3358 .op_name = "OP_SETCLIENTID_CONFIRM", 3359 .op_rsize_bop = nfsd4_only_status_rsize, 3360 }, 3361 [OP_VERIFY] = { 3362 .op_func = nfsd4_verify, 3363 .op_name = "OP_VERIFY", 3364 .op_rsize_bop = nfsd4_only_status_rsize, 3365 }, 3366 [OP_WRITE] = { 3367 .op_func = nfsd4_write, 3368 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3369 .op_name = "OP_WRITE", 3370 .op_rsize_bop = nfsd4_write_rsize, 3371 .op_get_currentstateid = nfsd4_get_writestateid, 3372 }, 3373 [OP_RELEASE_LOCKOWNER] = { 3374 .op_func = nfsd4_release_lockowner, 3375 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3376 | OP_MODIFIES_SOMETHING, 3377 .op_name = "OP_RELEASE_LOCKOWNER", 3378 .op_rsize_bop = nfsd4_only_status_rsize, 3379 }, 3380 3381 /* NFSv4.1 operations */ 3382 [OP_EXCHANGE_ID] = { 3383 .op_func = nfsd4_exchange_id, 3384 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3385 | OP_MODIFIES_SOMETHING, 3386 .op_name = "OP_EXCHANGE_ID", 3387 .op_rsize_bop = nfsd4_exchange_id_rsize, 3388 }, 3389 [OP_BACKCHANNEL_CTL] = { 3390 .op_func = nfsd4_backchannel_ctl, 3391 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3392 .op_name = "OP_BACKCHANNEL_CTL", 3393 .op_rsize_bop = nfsd4_only_status_rsize, 3394 }, 3395 [OP_BIND_CONN_TO_SESSION] = { 3396 .op_func = nfsd4_bind_conn_to_session, 3397 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3398 | OP_MODIFIES_SOMETHING, 3399 .op_name = "OP_BIND_CONN_TO_SESSION", 3400 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize, 3401 }, 3402 [OP_CREATE_SESSION] = { 3403 .op_func = nfsd4_create_session, 3404 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3405 | OP_MODIFIES_SOMETHING, 3406 .op_name = "OP_CREATE_SESSION", 3407 .op_rsize_bop = nfsd4_create_session_rsize, 3408 }, 3409 [OP_DESTROY_SESSION] = { 3410 .op_func = nfsd4_destroy_session, 3411 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3412 | OP_MODIFIES_SOMETHING, 3413 .op_name = "OP_DESTROY_SESSION", 3414 .op_rsize_bop = nfsd4_only_status_rsize, 3415 }, 3416 [OP_SEQUENCE] = { 3417 .op_func = nfsd4_sequence, 3418 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 3419 .op_name = "OP_SEQUENCE", 3420 .op_rsize_bop = nfsd4_sequence_rsize, 3421 }, 3422 [OP_DESTROY_CLIENTID] = { 3423 .op_func = nfsd4_destroy_clientid, 3424 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3425 | OP_MODIFIES_SOMETHING, 3426 .op_name = "OP_DESTROY_CLIENTID", 3427 .op_rsize_bop = nfsd4_only_status_rsize, 3428 }, 3429 [OP_RECLAIM_COMPLETE] = { 3430 .op_func = nfsd4_reclaim_complete, 3431 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3432 .op_name = "OP_RECLAIM_COMPLETE", 3433 .op_rsize_bop = nfsd4_only_status_rsize, 3434 }, 3435 [OP_SECINFO_NO_NAME] = { 3436 .op_func = nfsd4_secinfo_no_name, 3437 .op_release = nfsd4_secinfo_no_name_release, 3438 .op_flags = OP_HANDLES_WRONGSEC, 3439 .op_name = "OP_SECINFO_NO_NAME", 3440 .op_rsize_bop = nfsd4_secinfo_rsize, 3441 }, 3442 [OP_TEST_STATEID] = { 3443 .op_func = nfsd4_test_stateid, 3444 .op_flags = ALLOWED_WITHOUT_FH, 3445 .op_name = "OP_TEST_STATEID", 3446 .op_rsize_bop = nfsd4_test_stateid_rsize, 3447 }, 3448 [OP_FREE_STATEID] = { 3449 .op_func = nfsd4_free_stateid, 3450 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3451 .op_name = "OP_FREE_STATEID", 3452 .op_get_currentstateid = nfsd4_get_freestateid, 3453 .op_rsize_bop = nfsd4_only_status_rsize, 3454 }, 3455#ifdef CONFIG_NFSD_PNFS 3456 [OP_GETDEVICEINFO] = { 3457 .op_func = nfsd4_getdeviceinfo, 3458 .op_release = nfsd4_getdeviceinfo_release, 3459 .op_flags = ALLOWED_WITHOUT_FH, 3460 .op_name = "OP_GETDEVICEINFO", 3461 .op_rsize_bop = nfsd4_getdeviceinfo_rsize, 3462 }, 3463 [OP_LAYOUTGET] = { 3464 .op_func = nfsd4_layoutget, 3465 .op_release = nfsd4_layoutget_release, 3466 .op_flags = OP_MODIFIES_SOMETHING, 3467 .op_name = "OP_LAYOUTGET", 3468 .op_rsize_bop = nfsd4_layoutget_rsize, 3469 }, 3470 [OP_LAYOUTCOMMIT] = { 3471 .op_func = nfsd4_layoutcommit, 3472 .op_flags = OP_MODIFIES_SOMETHING, 3473 .op_name = "OP_LAYOUTCOMMIT", 3474 .op_rsize_bop = nfsd4_layoutcommit_rsize, 3475 }, 3476 [OP_LAYOUTRETURN] = { 3477 .op_func = nfsd4_layoutreturn, 3478 .op_flags = OP_MODIFIES_SOMETHING, 3479 .op_name = "OP_LAYOUTRETURN", 3480 .op_rsize_bop = nfsd4_layoutreturn_rsize, 3481 }, 3482#endif /* CONFIG_NFSD_PNFS */ 3483 3484 /* NFSv4.2 operations */ 3485 [OP_ALLOCATE] = { 3486 .op_func = nfsd4_allocate, 3487 .op_flags = OP_MODIFIES_SOMETHING, 3488 .op_name = "OP_ALLOCATE", 3489 .op_rsize_bop = nfsd4_only_status_rsize, 3490 }, 3491 [OP_DEALLOCATE] = { 3492 .op_func = nfsd4_deallocate, 3493 .op_flags = OP_MODIFIES_SOMETHING, 3494 .op_name = "OP_DEALLOCATE", 3495 .op_rsize_bop = nfsd4_only_status_rsize, 3496 }, 3497 [OP_CLONE] = { 3498 .op_func = nfsd4_clone, 3499 .op_flags = OP_MODIFIES_SOMETHING, 3500 .op_name = "OP_CLONE", 3501 .op_rsize_bop = nfsd4_only_status_rsize, 3502 }, 3503 [OP_COPY] = { 3504 .op_func = nfsd4_copy, 3505 .op_flags = OP_MODIFIES_SOMETHING, 3506 .op_name = "OP_COPY", 3507 .op_rsize_bop = nfsd4_copy_rsize, 3508 }, 3509 [OP_READ_PLUS] = { 3510 .op_func = nfsd4_read, 3511 .op_release = nfsd4_read_release, 3512 .op_name = "OP_READ_PLUS", 3513 .op_rsize_bop = nfsd4_read_plus_rsize, 3514 .op_get_currentstateid = nfsd4_get_readstateid, 3515 }, 3516 [OP_SEEK] = { 3517 .op_func = nfsd4_seek, 3518 .op_name = "OP_SEEK", 3519 .op_rsize_bop = nfsd4_seek_rsize, 3520 }, 3521 [OP_OFFLOAD_STATUS] = { 3522 .op_func = nfsd4_offload_status, 3523 .op_name = "OP_OFFLOAD_STATUS", 3524 .op_rsize_bop = nfsd4_offload_status_rsize, 3525 }, 3526 [OP_OFFLOAD_CANCEL] = { 3527 .op_func = nfsd4_offload_cancel, 3528 .op_flags = OP_MODIFIES_SOMETHING, 3529 .op_name = "OP_OFFLOAD_CANCEL", 3530 .op_rsize_bop = nfsd4_only_status_rsize, 3531 }, 3532 [OP_COPY_NOTIFY] = { 3533 .op_func = nfsd4_copy_notify, 3534 .op_flags = OP_MODIFIES_SOMETHING, 3535 .op_name = "OP_COPY_NOTIFY", 3536 .op_rsize_bop = nfsd4_copy_notify_rsize, 3537 }, 3538 [OP_GETXATTR] = { 3539 .op_func = nfsd4_getxattr, 3540 .op_name = "OP_GETXATTR", 3541 .op_rsize_bop = nfsd4_getxattr_rsize, 3542 }, 3543 [OP_SETXATTR] = { 3544 .op_func = nfsd4_setxattr, 3545 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3546 .op_name = "OP_SETXATTR", 3547 .op_rsize_bop = nfsd4_setxattr_rsize, 3548 }, 3549 [OP_LISTXATTRS] = { 3550 .op_func = nfsd4_listxattrs, 3551 .op_name = "OP_LISTXATTRS", 3552 .op_rsize_bop = nfsd4_listxattrs_rsize, 3553 }, 3554 [OP_REMOVEXATTR] = { 3555 .op_func = nfsd4_removexattr, 3556 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3557 .op_name = "OP_REMOVEXATTR", 3558 .op_rsize_bop = nfsd4_removexattr_rsize, 3559 }, 3560}; 3561 3562/** 3563 * nfsd4_spo_must_allow - Determine if the compound op contains an 3564 * operation that is allowed to be sent with machine credentials 3565 * 3566 * @rqstp: a pointer to the struct svc_rqst 3567 * 3568 * Checks to see if the compound contains a spo_must_allow op 3569 * and confirms that it was sent with the proper machine creds. 3570 */ 3571 3572bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 3573{ 3574 struct nfsd4_compoundres *resp = rqstp->rq_resp; 3575 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 3576 struct nfsd4_op *this; 3577 struct nfsd4_compound_state *cstate = &resp->cstate; 3578 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 3579 u32 opiter; 3580 3581 if (!cstate->minorversion) 3582 return false; 3583 3584 if (cstate->spo_must_allowed) 3585 return true; 3586 3587 opiter = resp->opcnt; 3588 while (opiter < argp->opcnt) { 3589 this = &argp->ops[opiter++]; 3590 if (test_bit(this->opnum, allow->u.longs) && 3591 cstate->clp->cl_mach_cred && 3592 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 3593 cstate->spo_must_allowed = true; 3594 return true; 3595 } 3596 } 3597 cstate->spo_must_allowed = false; 3598 return false; 3599} 3600 3601int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 3602{ 3603 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp) 3604 return op_encode_hdr_size * sizeof(__be32); 3605 3606 BUG_ON(OPDESC(op)->op_rsize_bop == NULL); 3607 return OPDESC(op)->op_rsize_bop(rqstp, op); 3608} 3609 3610void warn_on_nonidempotent_op(struct nfsd4_op *op) 3611{ 3612 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 3613 pr_err("unable to encode reply to nonidempotent op %u (%s)\n", 3614 op->opnum, nfsd4_op_name(op->opnum)); 3615 WARN_ON_ONCE(1); 3616 } 3617} 3618 3619static const char *nfsd4_op_name(unsigned opnum) 3620{ 3621 if (opnum < ARRAY_SIZE(nfsd4_ops)) 3622 return nfsd4_ops[opnum].op_name; 3623 return "unknown_operation"; 3624} 3625 3626static const struct svc_procedure nfsd_procedures4[2] = { 3627 [NFSPROC4_NULL] = { 3628 .pc_func = nfsd4_proc_null, 3629 .pc_decode = nfssvc_decode_voidarg, 3630 .pc_encode = nfssvc_encode_voidres, 3631 .pc_argsize = sizeof(struct nfsd_voidargs), 3632 .pc_argzero = sizeof(struct nfsd_voidargs), 3633 .pc_ressize = sizeof(struct nfsd_voidres), 3634 .pc_cachetype = RC_NOCACHE, 3635 .pc_xdrressize = 1, 3636 .pc_name = "NULL", 3637 }, 3638 [NFSPROC4_COMPOUND] = { 3639 .pc_func = nfsd4_proc_compound, 3640 .pc_decode = nfs4svc_decode_compoundargs, 3641 .pc_encode = nfs4svc_encode_compoundres, 3642 .pc_argsize = sizeof(struct nfsd4_compoundargs), 3643 .pc_argzero = offsetof(struct nfsd4_compoundargs, iops), 3644 .pc_ressize = sizeof(struct nfsd4_compoundres), 3645 .pc_release = nfsd4_release_compoundargs, 3646 .pc_cachetype = RC_NOCACHE, 3647 .pc_xdrressize = NFSD_BUFSIZE/4, 3648 .pc_name = "COMPOUND", 3649 }, 3650}; 3651 3652static DEFINE_PER_CPU_ALIGNED(unsigned long, 3653 nfsd_count4[ARRAY_SIZE(nfsd_procedures4)]); 3654const struct svc_version nfsd_version4 = { 3655 .vs_vers = 4, 3656 .vs_nproc = ARRAY_SIZE(nfsd_procedures4), 3657 .vs_proc = nfsd_procedures4, 3658 .vs_count = nfsd_count4, 3659 .vs_dispatch = nfsd_dispatch, 3660 .vs_xdrsize = NFS4_SVC_XDRSIZE, 3661 .vs_rpcb_optnl = true, 3662 .vs_need_cong_ctrl = true, 3663}; 3664