1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * This file contains vfs inode ops for the 9P2000 protocol. 4 * 5 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> 6 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> 7 */ 8 9#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 10 11#include <linux/module.h> 12#include <linux/errno.h> 13#include <linux/fs.h> 14#include <linux/file.h> 15#include <linux/pagemap.h> 16#include <linux/stat.h> 17#include <linux/string.h> 18#include <linux/namei.h> 19#include <linux/sched.h> 20#include <linux/slab.h> 21#include <linux/xattr.h> 22#include <linux/posix_acl.h> 23#include <net/9p/9p.h> 24#include <net/9p/client.h> 25 26#include "v9fs.h" 27#include "v9fs_vfs.h" 28#include "fid.h" 29#include "cache.h" 30#include "xattr.h" 31#include "acl.h" 32 33static const struct inode_operations v9fs_dir_inode_operations; 34static const struct inode_operations v9fs_dir_inode_operations_dotu; 35static const struct inode_operations v9fs_file_inode_operations; 36static const struct inode_operations v9fs_symlink_inode_operations; 37 38/** 39 * unixmode2p9mode - convert unix mode bits to plan 9 40 * @v9ses: v9fs session information 41 * @mode: mode to convert 42 * 43 */ 44 45static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode) 46{ 47 int res; 48 49 res = mode & 0777; 50 if (S_ISDIR(mode)) 51 res |= P9_DMDIR; 52 if (v9fs_proto_dotu(v9ses)) { 53 if (v9ses->nodev == 0) { 54 if (S_ISSOCK(mode)) 55 res |= P9_DMSOCKET; 56 if (S_ISFIFO(mode)) 57 res |= P9_DMNAMEDPIPE; 58 if (S_ISBLK(mode)) 59 res |= P9_DMDEVICE; 60 if (S_ISCHR(mode)) 61 res |= P9_DMDEVICE; 62 } 63 64 if ((mode & S_ISUID) == S_ISUID) 65 res |= P9_DMSETUID; 66 if ((mode & S_ISGID) == S_ISGID) 67 res |= P9_DMSETGID; 68 if ((mode & S_ISVTX) == S_ISVTX) 69 res |= P9_DMSETVTX; 70 } 71 return res; 72} 73 74/** 75 * p9mode2perm- convert plan9 mode bits to unix permission bits 76 * @v9ses: v9fs session information 77 * @stat: p9_wstat from which mode need to be derived 78 * 79 */ 80static int p9mode2perm(struct v9fs_session_info *v9ses, 81 struct p9_wstat *stat) 82{ 83 int res; 84 int mode = stat->mode; 85 86 res = mode & S_IALLUGO; 87 if (v9fs_proto_dotu(v9ses)) { 88 if ((mode & P9_DMSETUID) == P9_DMSETUID) 89 res |= S_ISUID; 90 91 if ((mode & P9_DMSETGID) == P9_DMSETGID) 92 res |= S_ISGID; 93 94 if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 95 res |= S_ISVTX; 96 } 97 return res; 98} 99 100/** 101 * p9mode2unixmode- convert plan9 mode bits to unix mode bits 102 * @v9ses: v9fs session information 103 * @stat: p9_wstat from which mode need to be derived 104 * @rdev: major number, minor number in case of device files. 105 * 106 */ 107static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, 108 struct p9_wstat *stat, dev_t *rdev) 109{ 110 int res, r; 111 u32 mode = stat->mode; 112 113 *rdev = 0; 114 res = p9mode2perm(v9ses, stat); 115 116 if ((mode & P9_DMDIR) == P9_DMDIR) 117 res |= S_IFDIR; 118 else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 119 res |= S_IFLNK; 120 else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 121 && (v9ses->nodev == 0)) 122 res |= S_IFSOCK; 123 else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 124 && (v9ses->nodev == 0)) 125 res |= S_IFIFO; 126 else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 127 && (v9ses->nodev == 0)) { 128 char type = 0; 129 int major = -1, minor = -1; 130 131 r = sscanf(stat->extension, "%c %i %i", &type, &major, &minor); 132 if (r != 3) { 133 p9_debug(P9_DEBUG_ERROR, 134 "invalid device string, umode will be bogus: %s\n", 135 stat->extension); 136 return res; 137 } 138 switch (type) { 139 case 'c': 140 res |= S_IFCHR; 141 break; 142 case 'b': 143 res |= S_IFBLK; 144 break; 145 default: 146 p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", 147 type, stat->extension); 148 } 149 *rdev = MKDEV(major, minor); 150 } else 151 res |= S_IFREG; 152 153 return res; 154} 155 156/** 157 * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 158 * @uflags: flags to convert 159 * @extended: if .u extensions are active 160 */ 161 162int v9fs_uflags2omode(int uflags, int extended) 163{ 164 int ret; 165 166 switch (uflags&3) { 167 default: 168 case O_RDONLY: 169 ret = P9_OREAD; 170 break; 171 172 case O_WRONLY: 173 ret = P9_OWRITE; 174 break; 175 176 case O_RDWR: 177 ret = P9_ORDWR; 178 break; 179 } 180 181 if (extended) { 182 if (uflags & O_EXCL) 183 ret |= P9_OEXCL; 184 185 if (uflags & O_APPEND) 186 ret |= P9_OAPPEND; 187 } 188 189 return ret; 190} 191 192/** 193 * v9fs_blank_wstat - helper function to setup a 9P stat structure 194 * @wstat: structure to initialize 195 * 196 */ 197 198void 199v9fs_blank_wstat(struct p9_wstat *wstat) 200{ 201 wstat->type = ~0; 202 wstat->dev = ~0; 203 wstat->qid.type = ~0; 204 wstat->qid.version = ~0; 205 *((long long *)&wstat->qid.path) = ~0; 206 wstat->mode = ~0; 207 wstat->atime = ~0; 208 wstat->mtime = ~0; 209 wstat->length = ~0; 210 wstat->name = NULL; 211 wstat->uid = NULL; 212 wstat->gid = NULL; 213 wstat->muid = NULL; 214 wstat->n_uid = INVALID_UID; 215 wstat->n_gid = INVALID_GID; 216 wstat->n_muid = INVALID_UID; 217 wstat->extension = NULL; 218} 219 220/** 221 * v9fs_alloc_inode - helper function to allocate an inode 222 * @sb: The superblock to allocate the inode from 223 */ 224struct inode *v9fs_alloc_inode(struct super_block *sb) 225{ 226 struct v9fs_inode *v9inode; 227 228 v9inode = alloc_inode_sb(sb, v9fs_inode_cache, GFP_KERNEL); 229 if (!v9inode) 230 return NULL; 231 v9inode->cache_validity = 0; 232 mutex_init(&v9inode->v_mutex); 233 return &v9inode->netfs.inode; 234} 235 236/** 237 * v9fs_free_inode - destroy an inode 238 * @inode: The inode to be freed 239 */ 240 241void v9fs_free_inode(struct inode *inode) 242{ 243 kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 244} 245 246/* 247 * Set parameters for the netfs library 248 */ 249void v9fs_set_netfs_context(struct inode *inode) 250{ 251 struct v9fs_inode *v9inode = V9FS_I(inode); 252 netfs_inode_init(&v9inode->netfs, &v9fs_req_ops); 253} 254 255int v9fs_init_inode(struct v9fs_session_info *v9ses, 256 struct inode *inode, umode_t mode, dev_t rdev) 257{ 258 int err = 0; 259 260 inode_init_owner(&nop_mnt_idmap, inode, NULL, mode); 261 inode->i_blocks = 0; 262 inode->i_rdev = rdev; 263 inode->i_atime = inode->i_mtime = inode_set_ctime_current(inode); 264 inode->i_mapping->a_ops = &v9fs_addr_operations; 265 inode->i_private = NULL; 266 267 switch (mode & S_IFMT) { 268 case S_IFIFO: 269 case S_IFBLK: 270 case S_IFCHR: 271 case S_IFSOCK: 272 if (v9fs_proto_dotl(v9ses)) { 273 inode->i_op = &v9fs_file_inode_operations_dotl; 274 } else if (v9fs_proto_dotu(v9ses)) { 275 inode->i_op = &v9fs_file_inode_operations; 276 } else { 277 p9_debug(P9_DEBUG_ERROR, 278 "special files without extended mode\n"); 279 err = -EINVAL; 280 goto error; 281 } 282 init_special_inode(inode, inode->i_mode, inode->i_rdev); 283 break; 284 case S_IFREG: 285 if (v9fs_proto_dotl(v9ses)) { 286 inode->i_op = &v9fs_file_inode_operations_dotl; 287 inode->i_fop = &v9fs_file_operations_dotl; 288 } else { 289 inode->i_op = &v9fs_file_inode_operations; 290 inode->i_fop = &v9fs_file_operations; 291 } 292 293 break; 294 case S_IFLNK: 295 if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 296 p9_debug(P9_DEBUG_ERROR, 297 "extended modes used with legacy protocol\n"); 298 err = -EINVAL; 299 goto error; 300 } 301 302 if (v9fs_proto_dotl(v9ses)) 303 inode->i_op = &v9fs_symlink_inode_operations_dotl; 304 else 305 inode->i_op = &v9fs_symlink_inode_operations; 306 307 break; 308 case S_IFDIR: 309 inc_nlink(inode); 310 if (v9fs_proto_dotl(v9ses)) 311 inode->i_op = &v9fs_dir_inode_operations_dotl; 312 else if (v9fs_proto_dotu(v9ses)) 313 inode->i_op = &v9fs_dir_inode_operations_dotu; 314 else 315 inode->i_op = &v9fs_dir_inode_operations; 316 317 if (v9fs_proto_dotl(v9ses)) 318 inode->i_fop = &v9fs_dir_operations_dotl; 319 else 320 inode->i_fop = &v9fs_dir_operations; 321 322 break; 323 default: 324 p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", 325 mode, mode & S_IFMT); 326 err = -EINVAL; 327 goto error; 328 } 329error: 330 return err; 331 332} 333 334/** 335 * v9fs_get_inode - helper function to setup an inode 336 * @sb: superblock 337 * @mode: mode to setup inode with 338 * @rdev: The device numbers to set 339 */ 340 341struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) 342{ 343 int err; 344 struct inode *inode; 345 struct v9fs_session_info *v9ses = sb->s_fs_info; 346 347 p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); 348 349 inode = new_inode(sb); 350 if (!inode) { 351 pr_warn("%s (%d): Problem allocating inode\n", 352 __func__, task_pid_nr(current)); 353 return ERR_PTR(-ENOMEM); 354 } 355 err = v9fs_init_inode(v9ses, inode, mode, rdev); 356 if (err) { 357 iput(inode); 358 return ERR_PTR(err); 359 } 360 v9fs_set_netfs_context(inode); 361 return inode; 362} 363 364/** 365 * v9fs_evict_inode - Remove an inode from the inode cache 366 * @inode: inode to release 367 * 368 */ 369void v9fs_evict_inode(struct inode *inode) 370{ 371 struct v9fs_inode __maybe_unused *v9inode = V9FS_I(inode); 372 __le32 __maybe_unused version; 373 374 truncate_inode_pages_final(&inode->i_data); 375 376#ifdef CONFIG_9P_FSCACHE 377 version = cpu_to_le32(v9inode->qid.version); 378 fscache_clear_inode_writeback(v9fs_inode_cookie(v9inode), inode, 379 &version); 380#endif 381 382 clear_inode(inode); 383 filemap_fdatawrite(&inode->i_data); 384 385#ifdef CONFIG_9P_FSCACHE 386 fscache_relinquish_cookie(v9fs_inode_cookie(v9inode), false); 387#endif 388} 389 390static int v9fs_test_inode(struct inode *inode, void *data) 391{ 392 int umode; 393 dev_t rdev; 394 struct v9fs_inode *v9inode = V9FS_I(inode); 395 struct p9_wstat *st = (struct p9_wstat *)data; 396 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 397 398 umode = p9mode2unixmode(v9ses, st, &rdev); 399 /* don't match inode of different type */ 400 if (inode_wrong_type(inode, umode)) 401 return 0; 402 403 /* compare qid details */ 404 if (memcmp(&v9inode->qid.version, 405 &st->qid.version, sizeof(v9inode->qid.version))) 406 return 0; 407 408 if (v9inode->qid.type != st->qid.type) 409 return 0; 410 411 if (v9inode->qid.path != st->qid.path) 412 return 0; 413 return 1; 414} 415 416static int v9fs_test_new_inode(struct inode *inode, void *data) 417{ 418 return 0; 419} 420 421static int v9fs_set_inode(struct inode *inode, void *data) 422{ 423 struct v9fs_inode *v9inode = V9FS_I(inode); 424 struct p9_wstat *st = (struct p9_wstat *)data; 425 426 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 427 return 0; 428} 429 430static struct inode *v9fs_qid_iget(struct super_block *sb, 431 struct p9_qid *qid, 432 struct p9_wstat *st, 433 int new) 434{ 435 dev_t rdev; 436 int retval; 437 umode_t umode; 438 unsigned long i_ino; 439 struct inode *inode; 440 struct v9fs_session_info *v9ses = sb->s_fs_info; 441 int (*test)(struct inode *inode, void *data); 442 443 if (new) 444 test = v9fs_test_new_inode; 445 else 446 test = v9fs_test_inode; 447 448 i_ino = v9fs_qid2ino(qid); 449 inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 450 if (!inode) 451 return ERR_PTR(-ENOMEM); 452 if (!(inode->i_state & I_NEW)) 453 return inode; 454 /* 455 * initialize the inode with the stat info 456 * FIXME!! we may need support for stale inodes 457 * later. 458 */ 459 inode->i_ino = i_ino; 460 umode = p9mode2unixmode(v9ses, st, &rdev); 461 retval = v9fs_init_inode(v9ses, inode, umode, rdev); 462 if (retval) 463 goto error; 464 465 v9fs_stat2inode(st, inode, sb, 0); 466 v9fs_set_netfs_context(inode); 467 v9fs_cache_inode_get_cookie(inode); 468 unlock_new_inode(inode); 469 return inode; 470error: 471 iget_failed(inode); 472 return ERR_PTR(retval); 473 474} 475 476struct inode * 477v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 478 struct super_block *sb, int new) 479{ 480 struct p9_wstat *st; 481 struct inode *inode = NULL; 482 483 st = p9_client_stat(fid); 484 if (IS_ERR(st)) 485 return ERR_CAST(st); 486 487 inode = v9fs_qid_iget(sb, &st->qid, st, new); 488 p9stat_free(st); 489 kfree(st); 490 return inode; 491} 492 493/** 494 * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 495 * plan 9 AT flag. 496 * @flags: flags to convert 497 */ 498static int v9fs_at_to_dotl_flags(int flags) 499{ 500 int rflags = 0; 501 502 if (flags & AT_REMOVEDIR) 503 rflags |= P9_DOTL_AT_REMOVEDIR; 504 505 return rflags; 506} 507 508/** 509 * v9fs_dec_count - helper functon to drop i_nlink. 510 * 511 * If a directory had nlink <= 2 (including . and ..), then we should not drop 512 * the link count, which indicates the underlying exported fs doesn't maintain 513 * nlink accurately. e.g. 514 * - overlayfs sets nlink to 1 for merged dir 515 * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 516 * than EXT4_LINK_MAX (65000) links. 517 * 518 * @inode: inode whose nlink is being dropped 519 */ 520static void v9fs_dec_count(struct inode *inode) 521{ 522 if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 523 drop_nlink(inode); 524} 525 526/** 527 * v9fs_remove - helper function to remove files and directories 528 * @dir: directory inode that is being deleted 529 * @dentry: dentry that is being deleted 530 * @flags: removing a directory 531 * 532 */ 533 534static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 535{ 536 struct inode *inode; 537 int retval = -EOPNOTSUPP; 538 struct p9_fid *v9fid, *dfid; 539 struct v9fs_session_info *v9ses; 540 541 p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 542 dir, dentry, flags); 543 544 v9ses = v9fs_inode2v9ses(dir); 545 inode = d_inode(dentry); 546 dfid = v9fs_parent_fid(dentry); 547 if (IS_ERR(dfid)) { 548 retval = PTR_ERR(dfid); 549 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 550 return retval; 551 } 552 if (v9fs_proto_dotl(v9ses)) 553 retval = p9_client_unlinkat(dfid, dentry->d_name.name, 554 v9fs_at_to_dotl_flags(flags)); 555 p9_fid_put(dfid); 556 if (retval == -EOPNOTSUPP) { 557 /* Try the one based on path */ 558 v9fid = v9fs_fid_clone(dentry); 559 if (IS_ERR(v9fid)) 560 return PTR_ERR(v9fid); 561 retval = p9_client_remove(v9fid); 562 } 563 if (!retval) { 564 /* 565 * directories on unlink should have zero 566 * link count 567 */ 568 if (flags & AT_REMOVEDIR) { 569 clear_nlink(inode); 570 v9fs_dec_count(dir); 571 } else 572 v9fs_dec_count(inode); 573 574 v9fs_invalidate_inode_attr(inode); 575 v9fs_invalidate_inode_attr(dir); 576 577 /* invalidate all fids associated with dentry */ 578 /* NOTE: This will not include open fids */ 579 dentry->d_op->d_release(dentry); 580 } 581 return retval; 582} 583 584/** 585 * v9fs_create - Create a file 586 * @v9ses: session information 587 * @dir: directory that dentry is being created in 588 * @dentry: dentry that is being created 589 * @extension: 9p2000.u extension string to support devices, etc. 590 * @perm: create permissions 591 * @mode: open mode 592 * 593 */ 594static struct p9_fid * 595v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 596 struct dentry *dentry, char *extension, u32 perm, u8 mode) 597{ 598 int err; 599 const unsigned char *name; 600 struct p9_fid *dfid, *ofid = NULL, *fid = NULL; 601 struct inode *inode; 602 603 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 604 605 name = dentry->d_name.name; 606 dfid = v9fs_parent_fid(dentry); 607 if (IS_ERR(dfid)) { 608 err = PTR_ERR(dfid); 609 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 610 return ERR_PTR(err); 611 } 612 613 /* clone a fid to use for creation */ 614 ofid = clone_fid(dfid); 615 if (IS_ERR(ofid)) { 616 err = PTR_ERR(ofid); 617 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 618 goto error; 619 } 620 621 err = p9_client_fcreate(ofid, name, perm, mode, extension); 622 if (err < 0) { 623 p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 624 goto error; 625 } 626 627 if (!(perm & P9_DMLINK)) { 628 /* now walk from the parent so we can get unopened fid */ 629 fid = p9_client_walk(dfid, 1, &name, 1); 630 if (IS_ERR(fid)) { 631 err = PTR_ERR(fid); 632 p9_debug(P9_DEBUG_VFS, 633 "p9_client_walk failed %d\n", err); 634 goto error; 635 } 636 /* 637 * instantiate inode and assign the unopened fid to the dentry 638 */ 639 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 640 if (IS_ERR(inode)) { 641 err = PTR_ERR(inode); 642 p9_debug(P9_DEBUG_VFS, 643 "inode creation failed %d\n", err); 644 goto error; 645 } 646 v9fs_fid_add(dentry, &fid); 647 d_instantiate(dentry, inode); 648 } 649 p9_fid_put(dfid); 650 return ofid; 651error: 652 p9_fid_put(dfid); 653 p9_fid_put(ofid); 654 p9_fid_put(fid); 655 return ERR_PTR(err); 656} 657 658/** 659 * v9fs_vfs_create - VFS hook to create a regular file 660 * @idmap: idmap of the mount 661 * @dir: The parent directory 662 * @dentry: The name of file to be created 663 * @mode: The UNIX file mode to set 664 * @excl: True if the file must not yet exist 665 * 666 * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 667 * for mknod(2). 668 * 669 */ 670 671static int 672v9fs_vfs_create(struct mnt_idmap *idmap, struct inode *dir, 673 struct dentry *dentry, umode_t mode, bool excl) 674{ 675 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 676 u32 perm = unixmode2p9mode(v9ses, mode); 677 struct p9_fid *fid; 678 679 /* P9_OEXCL? */ 680 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 681 if (IS_ERR(fid)) 682 return PTR_ERR(fid); 683 684 v9fs_invalidate_inode_attr(dir); 685 p9_fid_put(fid); 686 687 return 0; 688} 689 690/** 691 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 692 * @idmap: idmap of the mount 693 * @dir: inode that is being unlinked 694 * @dentry: dentry that is being unlinked 695 * @mode: mode for new directory 696 * 697 */ 698 699static int v9fs_vfs_mkdir(struct mnt_idmap *idmap, struct inode *dir, 700 struct dentry *dentry, umode_t mode) 701{ 702 int err; 703 u32 perm; 704 struct p9_fid *fid; 705 struct v9fs_session_info *v9ses; 706 707 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 708 err = 0; 709 v9ses = v9fs_inode2v9ses(dir); 710 perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 711 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 712 if (IS_ERR(fid)) { 713 err = PTR_ERR(fid); 714 fid = NULL; 715 } else { 716 inc_nlink(dir); 717 v9fs_invalidate_inode_attr(dir); 718 } 719 720 if (fid) 721 p9_fid_put(fid); 722 723 return err; 724} 725 726/** 727 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 728 * @dir: inode that is being walked from 729 * @dentry: dentry that is being walked to? 730 * @flags: lookup flags (unused) 731 * 732 */ 733 734struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 735 unsigned int flags) 736{ 737 struct dentry *res; 738 struct v9fs_session_info *v9ses; 739 struct p9_fid *dfid, *fid; 740 struct inode *inode; 741 const unsigned char *name; 742 743 p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 744 dir, dentry, dentry, flags); 745 746 if (dentry->d_name.len > NAME_MAX) 747 return ERR_PTR(-ENAMETOOLONG); 748 749 v9ses = v9fs_inode2v9ses(dir); 750 /* We can walk d_parent because we hold the dir->i_mutex */ 751 dfid = v9fs_parent_fid(dentry); 752 if (IS_ERR(dfid)) 753 return ERR_CAST(dfid); 754 755 /* 756 * Make sure we don't use a wrong inode due to parallel 757 * unlink. For cached mode create calls request for new 758 * inode. But with cache disabled, lookup should do this. 759 */ 760 name = dentry->d_name.name; 761 fid = p9_client_walk(dfid, 1, &name, 1); 762 p9_fid_put(dfid); 763 if (fid == ERR_PTR(-ENOENT)) 764 inode = NULL; 765 else if (IS_ERR(fid)) 766 inode = ERR_CAST(fid); 767 else if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) 768 inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 769 else 770 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 771 /* 772 * If we had a rename on the server and a parallel lookup 773 * for the new name, then make sure we instantiate with 774 * the new name. ie look up for a/b, while on server somebody 775 * moved b under k and client parallely did a lookup for 776 * k/b. 777 */ 778 res = d_splice_alias(inode, dentry); 779 if (!IS_ERR(fid)) { 780 if (!res) 781 v9fs_fid_add(dentry, &fid); 782 else if (!IS_ERR(res)) 783 v9fs_fid_add(res, &fid); 784 else 785 p9_fid_put(fid); 786 } 787 return res; 788} 789 790static int 791v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 792 struct file *file, unsigned int flags, umode_t mode) 793{ 794 int err; 795 u32 perm; 796 struct v9fs_inode __maybe_unused *v9inode; 797 struct v9fs_session_info *v9ses; 798 struct p9_fid *fid; 799 struct dentry *res = NULL; 800 struct inode *inode; 801 int p9_omode; 802 803 if (d_in_lookup(dentry)) { 804 res = v9fs_vfs_lookup(dir, dentry, 0); 805 if (IS_ERR(res)) 806 return PTR_ERR(res); 807 808 if (res) 809 dentry = res; 810 } 811 812 /* Only creates */ 813 if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 814 return finish_no_open(file, res); 815 816 v9ses = v9fs_inode2v9ses(dir); 817 perm = unixmode2p9mode(v9ses, mode); 818 p9_omode = v9fs_uflags2omode(flags, v9fs_proto_dotu(v9ses)); 819 820 if ((v9ses->cache & CACHE_WRITEBACK) && (p9_omode & P9_OWRITE)) { 821 p9_omode = (p9_omode & ~P9_OWRITE) | P9_ORDWR; 822 p9_debug(P9_DEBUG_CACHE, 823 "write-only file with writeback enabled, creating w/ O_RDWR\n"); 824 } 825 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, p9_omode); 826 if (IS_ERR(fid)) { 827 err = PTR_ERR(fid); 828 goto error; 829 } 830 831 v9fs_invalidate_inode_attr(dir); 832 inode = d_inode(dentry); 833 v9inode = V9FS_I(inode); 834 err = finish_open(file, dentry, generic_file_open); 835 if (err) 836 goto error; 837 838 file->private_data = fid; 839#ifdef CONFIG_9P_FSCACHE 840 if (v9ses->cache & CACHE_FSCACHE) 841 fscache_use_cookie(v9fs_inode_cookie(v9inode), 842 file->f_mode & FMODE_WRITE); 843#endif 844 845 v9fs_fid_add_modes(fid, v9ses->flags, v9ses->cache, file->f_flags); 846 v9fs_open_fid_add(inode, &fid); 847 848 file->f_mode |= FMODE_CREATED; 849out: 850 dput(res); 851 return err; 852 853error: 854 p9_fid_put(fid); 855 goto out; 856} 857 858/** 859 * v9fs_vfs_unlink - VFS unlink hook to delete an inode 860 * @i: inode that is being unlinked 861 * @d: dentry that is being unlinked 862 * 863 */ 864 865int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 866{ 867 return v9fs_remove(i, d, 0); 868} 869 870/** 871 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 872 * @i: inode that is being unlinked 873 * @d: dentry that is being unlinked 874 * 875 */ 876 877int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 878{ 879 return v9fs_remove(i, d, AT_REMOVEDIR); 880} 881 882/** 883 * v9fs_vfs_rename - VFS hook to rename an inode 884 * @idmap: The idmap of the mount 885 * @old_dir: old dir inode 886 * @old_dentry: old dentry 887 * @new_dir: new dir inode 888 * @new_dentry: new dentry 889 * @flags: RENAME_* flags 890 * 891 */ 892 893int 894v9fs_vfs_rename(struct mnt_idmap *idmap, struct inode *old_dir, 895 struct dentry *old_dentry, struct inode *new_dir, 896 struct dentry *new_dentry, unsigned int flags) 897{ 898 int retval; 899 struct inode *old_inode; 900 struct inode *new_inode; 901 struct v9fs_session_info *v9ses; 902 struct p9_fid *oldfid = NULL, *dfid = NULL; 903 struct p9_fid *olddirfid = NULL; 904 struct p9_fid *newdirfid = NULL; 905 struct p9_wstat wstat; 906 907 if (flags) 908 return -EINVAL; 909 910 p9_debug(P9_DEBUG_VFS, "\n"); 911 old_inode = d_inode(old_dentry); 912 new_inode = d_inode(new_dentry); 913 v9ses = v9fs_inode2v9ses(old_inode); 914 oldfid = v9fs_fid_lookup(old_dentry); 915 if (IS_ERR(oldfid)) 916 return PTR_ERR(oldfid); 917 918 dfid = v9fs_parent_fid(old_dentry); 919 olddirfid = clone_fid(dfid); 920 p9_fid_put(dfid); 921 dfid = NULL; 922 923 if (IS_ERR(olddirfid)) { 924 retval = PTR_ERR(olddirfid); 925 goto error; 926 } 927 928 dfid = v9fs_parent_fid(new_dentry); 929 newdirfid = clone_fid(dfid); 930 p9_fid_put(dfid); 931 dfid = NULL; 932 933 if (IS_ERR(newdirfid)) { 934 retval = PTR_ERR(newdirfid); 935 goto error; 936 } 937 938 down_write(&v9ses->rename_sem); 939 if (v9fs_proto_dotl(v9ses)) { 940 retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 941 newdirfid, new_dentry->d_name.name); 942 if (retval == -EOPNOTSUPP) 943 retval = p9_client_rename(oldfid, newdirfid, 944 new_dentry->d_name.name); 945 if (retval != -EOPNOTSUPP) 946 goto error_locked; 947 } 948 if (old_dentry->d_parent != new_dentry->d_parent) { 949 /* 950 * 9P .u can only handle file rename in the same directory 951 */ 952 953 p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 954 retval = -EXDEV; 955 goto error_locked; 956 } 957 v9fs_blank_wstat(&wstat); 958 wstat.muid = v9ses->uname; 959 wstat.name = new_dentry->d_name.name; 960 retval = p9_client_wstat(oldfid, &wstat); 961 962error_locked: 963 if (!retval) { 964 if (new_inode) { 965 if (S_ISDIR(new_inode->i_mode)) 966 clear_nlink(new_inode); 967 else 968 v9fs_dec_count(new_inode); 969 } 970 if (S_ISDIR(old_inode->i_mode)) { 971 if (!new_inode) 972 inc_nlink(new_dir); 973 v9fs_dec_count(old_dir); 974 } 975 v9fs_invalidate_inode_attr(old_inode); 976 v9fs_invalidate_inode_attr(old_dir); 977 v9fs_invalidate_inode_attr(new_dir); 978 979 /* successful rename */ 980 d_move(old_dentry, new_dentry); 981 } 982 up_write(&v9ses->rename_sem); 983 984error: 985 p9_fid_put(newdirfid); 986 p9_fid_put(olddirfid); 987 p9_fid_put(oldfid); 988 return retval; 989} 990 991/** 992 * v9fs_vfs_getattr - retrieve file metadata 993 * @idmap: idmap of the mount 994 * @path: Object to query 995 * @stat: metadata structure to populate 996 * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 997 * @flags: AT_STATX_xxx setting 998 * 999 */ 1000 1001static int 1002v9fs_vfs_getattr(struct mnt_idmap *idmap, const struct path *path, 1003 struct kstat *stat, u32 request_mask, unsigned int flags) 1004{ 1005 struct dentry *dentry = path->dentry; 1006 struct inode *inode = d_inode(dentry); 1007 struct v9fs_session_info *v9ses; 1008 struct p9_fid *fid; 1009 struct p9_wstat *st; 1010 1011 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 1012 v9ses = v9fs_dentry2v9ses(dentry); 1013 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) { 1014 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat); 1015 return 0; 1016 } else if (v9ses->cache & CACHE_WRITEBACK) { 1017 if (S_ISREG(inode->i_mode)) { 1018 int retval = filemap_fdatawrite(inode->i_mapping); 1019 1020 if (retval) 1021 p9_debug(P9_DEBUG_ERROR, 1022 "flushing writeback during getattr returned %d\n", retval); 1023 } 1024 } 1025 fid = v9fs_fid_lookup(dentry); 1026 if (IS_ERR(fid)) 1027 return PTR_ERR(fid); 1028 1029 st = p9_client_stat(fid); 1030 p9_fid_put(fid); 1031 if (IS_ERR(st)) 1032 return PTR_ERR(st); 1033 1034 v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 1035 generic_fillattr(&nop_mnt_idmap, request_mask, d_inode(dentry), stat); 1036 1037 p9stat_free(st); 1038 kfree(st); 1039 return 0; 1040} 1041 1042/** 1043 * v9fs_vfs_setattr - set file metadata 1044 * @idmap: idmap of the mount 1045 * @dentry: file whose metadata to set 1046 * @iattr: metadata assignment structure 1047 * 1048 */ 1049 1050static int v9fs_vfs_setattr(struct mnt_idmap *idmap, 1051 struct dentry *dentry, struct iattr *iattr) 1052{ 1053 int retval, use_dentry = 0; 1054 struct inode *inode = d_inode(dentry); 1055 struct v9fs_session_info *v9ses; 1056 struct p9_fid *fid = NULL; 1057 struct p9_wstat wstat; 1058 1059 p9_debug(P9_DEBUG_VFS, "\n"); 1060 retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr); 1061 if (retval) 1062 return retval; 1063 1064 v9ses = v9fs_dentry2v9ses(dentry); 1065 if (iattr->ia_valid & ATTR_FILE) { 1066 fid = iattr->ia_file->private_data; 1067 WARN_ON(!fid); 1068 } 1069 if (!fid) { 1070 fid = v9fs_fid_lookup(dentry); 1071 use_dentry = 1; 1072 } 1073 if (IS_ERR(fid)) 1074 return PTR_ERR(fid); 1075 1076 v9fs_blank_wstat(&wstat); 1077 if (iattr->ia_valid & ATTR_MODE) 1078 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 1079 1080 if (iattr->ia_valid & ATTR_MTIME) 1081 wstat.mtime = iattr->ia_mtime.tv_sec; 1082 1083 if (iattr->ia_valid & ATTR_ATIME) 1084 wstat.atime = iattr->ia_atime.tv_sec; 1085 1086 if (iattr->ia_valid & ATTR_SIZE) 1087 wstat.length = iattr->ia_size; 1088 1089 if (v9fs_proto_dotu(v9ses)) { 1090 if (iattr->ia_valid & ATTR_UID) 1091 wstat.n_uid = iattr->ia_uid; 1092 1093 if (iattr->ia_valid & ATTR_GID) 1094 wstat.n_gid = iattr->ia_gid; 1095 } 1096 1097 /* Write all dirty data */ 1098 if (d_is_reg(dentry)) { 1099 retval = filemap_fdatawrite(inode->i_mapping); 1100 if (retval) 1101 p9_debug(P9_DEBUG_ERROR, 1102 "flushing writeback during setattr returned %d\n", retval); 1103 } 1104 1105 retval = p9_client_wstat(fid, &wstat); 1106 1107 if (use_dentry) 1108 p9_fid_put(fid); 1109 1110 if (retval < 0) 1111 return retval; 1112 1113 if ((iattr->ia_valid & ATTR_SIZE) && 1114 iattr->ia_size != i_size_read(inode)) { 1115 truncate_setsize(inode, iattr->ia_size); 1116 truncate_pagecache(inode, iattr->ia_size); 1117 1118#ifdef CONFIG_9P_FSCACHE 1119 if (v9ses->cache & CACHE_FSCACHE) { 1120 struct v9fs_inode *v9inode = V9FS_I(inode); 1121 1122 fscache_resize_cookie(v9fs_inode_cookie(v9inode), iattr->ia_size); 1123 } 1124#endif 1125 } 1126 1127 v9fs_invalidate_inode_attr(inode); 1128 1129 setattr_copy(&nop_mnt_idmap, inode, iattr); 1130 mark_inode_dirty(inode); 1131 return 0; 1132} 1133 1134/** 1135 * v9fs_stat2inode - populate an inode structure with mistat info 1136 * @stat: Plan 9 metadata (mistat) structure 1137 * @inode: inode to populate 1138 * @sb: superblock of filesystem 1139 * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 1140 * 1141 */ 1142 1143void 1144v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 1145 struct super_block *sb, unsigned int flags) 1146{ 1147 umode_t mode; 1148 struct v9fs_session_info *v9ses = sb->s_fs_info; 1149 struct v9fs_inode *v9inode = V9FS_I(inode); 1150 1151 set_nlink(inode, 1); 1152 1153 inode->i_atime.tv_sec = stat->atime; 1154 inode->i_mtime.tv_sec = stat->mtime; 1155 inode_set_ctime(inode, stat->mtime, 0); 1156 1157 inode->i_uid = v9ses->dfltuid; 1158 inode->i_gid = v9ses->dfltgid; 1159 1160 if (v9fs_proto_dotu(v9ses)) { 1161 inode->i_uid = stat->n_uid; 1162 inode->i_gid = stat->n_gid; 1163 } 1164 if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 1165 if (v9fs_proto_dotu(v9ses)) { 1166 unsigned int i_nlink; 1167 /* 1168 * Hadlink support got added later to the .u extension. 1169 * So there can be a server out there that doesn't 1170 * support this even with .u extension. That would 1171 * just leave us with stat->extension being an empty 1172 * string, though. 1173 */ 1174 /* HARDLINKCOUNT %u */ 1175 if (sscanf(stat->extension, 1176 " HARDLINKCOUNT %u", &i_nlink) == 1) 1177 set_nlink(inode, i_nlink); 1178 } 1179 } 1180 mode = p9mode2perm(v9ses, stat); 1181 mode |= inode->i_mode & ~S_IALLUGO; 1182 inode->i_mode = mode; 1183 1184 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 1185 v9fs_i_size_write(inode, stat->length); 1186 /* not real number of blocks, but 512 byte ones ... */ 1187 inode->i_blocks = (stat->length + 512 - 1) >> 9; 1188 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 1189} 1190 1191/** 1192 * v9fs_qid2ino - convert qid into inode number 1193 * @qid: qid to hash 1194 * 1195 * BUG: potential for inode number collisions? 1196 */ 1197 1198ino_t v9fs_qid2ino(struct p9_qid *qid) 1199{ 1200 u64 path = qid->path + 2; 1201 ino_t i = 0; 1202 1203 if (sizeof(ino_t) == sizeof(path)) 1204 memcpy(&i, &path, sizeof(ino_t)); 1205 else 1206 i = (ino_t) (path ^ (path >> 32)); 1207 1208 return i; 1209} 1210 1211/** 1212 * v9fs_vfs_get_link - follow a symlink path 1213 * @dentry: dentry for symlink 1214 * @inode: inode for symlink 1215 * @done: delayed call for when we are done with the return value 1216 */ 1217 1218static const char *v9fs_vfs_get_link(struct dentry *dentry, 1219 struct inode *inode, 1220 struct delayed_call *done) 1221{ 1222 struct v9fs_session_info *v9ses; 1223 struct p9_fid *fid; 1224 struct p9_wstat *st; 1225 char *res; 1226 1227 if (!dentry) 1228 return ERR_PTR(-ECHILD); 1229 1230 v9ses = v9fs_dentry2v9ses(dentry); 1231 if (!v9fs_proto_dotu(v9ses)) 1232 return ERR_PTR(-EBADF); 1233 1234 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 1235 fid = v9fs_fid_lookup(dentry); 1236 1237 if (IS_ERR(fid)) 1238 return ERR_CAST(fid); 1239 1240 st = p9_client_stat(fid); 1241 p9_fid_put(fid); 1242 if (IS_ERR(st)) 1243 return ERR_CAST(st); 1244 1245 if (!(st->mode & P9_DMSYMLINK)) { 1246 p9stat_free(st); 1247 kfree(st); 1248 return ERR_PTR(-EINVAL); 1249 } 1250 res = st->extension; 1251 st->extension = NULL; 1252 if (strlen(res) >= PATH_MAX) 1253 res[PATH_MAX - 1] = '\0'; 1254 1255 p9stat_free(st); 1256 kfree(st); 1257 set_delayed_call(done, kfree_link, res); 1258 return res; 1259} 1260 1261/** 1262 * v9fs_vfs_mkspecial - create a special file 1263 * @dir: inode to create special file in 1264 * @dentry: dentry to create 1265 * @perm: mode to create special file 1266 * @extension: 9p2000.u format extension string representing special file 1267 * 1268 */ 1269 1270static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1271 u32 perm, const char *extension) 1272{ 1273 struct p9_fid *fid; 1274 struct v9fs_session_info *v9ses; 1275 1276 v9ses = v9fs_inode2v9ses(dir); 1277 if (!v9fs_proto_dotu(v9ses)) { 1278 p9_debug(P9_DEBUG_ERROR, "not extended\n"); 1279 return -EPERM; 1280 } 1281 1282 fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1283 P9_OREAD); 1284 if (IS_ERR(fid)) 1285 return PTR_ERR(fid); 1286 1287 v9fs_invalidate_inode_attr(dir); 1288 p9_fid_put(fid); 1289 return 0; 1290} 1291 1292/** 1293 * v9fs_vfs_symlink - helper function to create symlinks 1294 * @idmap: idmap of the mount 1295 * @dir: directory inode containing symlink 1296 * @dentry: dentry for symlink 1297 * @symname: symlink data 1298 * 1299 * See Also: 9P2000.u RFC for more information 1300 * 1301 */ 1302 1303static int 1304v9fs_vfs_symlink(struct mnt_idmap *idmap, struct inode *dir, 1305 struct dentry *dentry, const char *symname) 1306{ 1307 p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 1308 dir->i_ino, dentry, symname); 1309 1310 return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1311} 1312 1313#define U32_MAX_DIGITS 10 1314 1315/** 1316 * v9fs_vfs_link - create a hardlink 1317 * @old_dentry: dentry for file to link to 1318 * @dir: inode destination for new link 1319 * @dentry: dentry for link 1320 * 1321 */ 1322 1323static int 1324v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 1325 struct dentry *dentry) 1326{ 1327 int retval; 1328 char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1329 struct p9_fid *oldfid; 1330 1331 p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 1332 dir->i_ino, dentry, old_dentry); 1333 1334 oldfid = v9fs_fid_clone(old_dentry); 1335 if (IS_ERR(oldfid)) 1336 return PTR_ERR(oldfid); 1337 1338 sprintf(name, "%d\n", oldfid->fid); 1339 retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1340 if (!retval) { 1341 v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1342 v9fs_invalidate_inode_attr(dir); 1343 } 1344 p9_fid_put(oldfid); 1345 return retval; 1346} 1347 1348/** 1349 * v9fs_vfs_mknod - create a special file 1350 * @idmap: idmap of the mount 1351 * @dir: inode destination for new link 1352 * @dentry: dentry for file 1353 * @mode: mode for creation 1354 * @rdev: device associated with special file 1355 * 1356 */ 1357 1358static int 1359v9fs_vfs_mknod(struct mnt_idmap *idmap, struct inode *dir, 1360 struct dentry *dentry, umode_t mode, dev_t rdev) 1361{ 1362 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1363 int retval; 1364 char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1365 u32 perm; 1366 1367 p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", 1368 dir->i_ino, dentry, mode, 1369 MAJOR(rdev), MINOR(rdev)); 1370 1371 /* build extension */ 1372 if (S_ISBLK(mode)) 1373 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 1374 else if (S_ISCHR(mode)) 1375 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1376 else 1377 *name = 0; 1378 1379 perm = unixmode2p9mode(v9ses, mode); 1380 retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 1381 1382 return retval; 1383} 1384 1385int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1386{ 1387 int umode; 1388 dev_t rdev; 1389 struct p9_wstat *st; 1390 struct v9fs_session_info *v9ses; 1391 unsigned int flags; 1392 1393 v9ses = v9fs_inode2v9ses(inode); 1394 st = p9_client_stat(fid); 1395 if (IS_ERR(st)) 1396 return PTR_ERR(st); 1397 /* 1398 * Don't update inode if the file type is different 1399 */ 1400 umode = p9mode2unixmode(v9ses, st, &rdev); 1401 if (inode_wrong_type(inode, umode)) 1402 goto out; 1403 1404 /* 1405 * We don't want to refresh inode->i_size, 1406 * because we may have cached data 1407 */ 1408 flags = (v9ses->cache & CACHE_LOOSE) ? 1409 V9FS_STAT2INODE_KEEP_ISIZE : 0; 1410 v9fs_stat2inode(st, inode, inode->i_sb, flags); 1411out: 1412 p9stat_free(st); 1413 kfree(st); 1414 return 0; 1415} 1416 1417static const struct inode_operations v9fs_dir_inode_operations_dotu = { 1418 .create = v9fs_vfs_create, 1419 .lookup = v9fs_vfs_lookup, 1420 .atomic_open = v9fs_vfs_atomic_open, 1421 .symlink = v9fs_vfs_symlink, 1422 .link = v9fs_vfs_link, 1423 .unlink = v9fs_vfs_unlink, 1424 .mkdir = v9fs_vfs_mkdir, 1425 .rmdir = v9fs_vfs_rmdir, 1426 .mknod = v9fs_vfs_mknod, 1427 .rename = v9fs_vfs_rename, 1428 .getattr = v9fs_vfs_getattr, 1429 .setattr = v9fs_vfs_setattr, 1430}; 1431 1432static const struct inode_operations v9fs_dir_inode_operations = { 1433 .create = v9fs_vfs_create, 1434 .lookup = v9fs_vfs_lookup, 1435 .atomic_open = v9fs_vfs_atomic_open, 1436 .unlink = v9fs_vfs_unlink, 1437 .mkdir = v9fs_vfs_mkdir, 1438 .rmdir = v9fs_vfs_rmdir, 1439 .mknod = v9fs_vfs_mknod, 1440 .rename = v9fs_vfs_rename, 1441 .getattr = v9fs_vfs_getattr, 1442 .setattr = v9fs_vfs_setattr, 1443}; 1444 1445static const struct inode_operations v9fs_file_inode_operations = { 1446 .getattr = v9fs_vfs_getattr, 1447 .setattr = v9fs_vfs_setattr, 1448}; 1449 1450static const struct inode_operations v9fs_symlink_inode_operations = { 1451 .get_link = v9fs_vfs_get_link, 1452 .getattr = v9fs_vfs_getattr, 1453 .setattr = v9fs_vfs_setattr, 1454}; 1455 1456