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 33 static const struct inode_operations v9fs_dir_inode_operations; 34 static const struct inode_operations v9fs_dir_inode_operations_dotu; 35 static const struct inode_operations v9fs_file_inode_operations; 36 static 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 45 static 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 */ 80 static 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 & 0777; /* S_IRWXUGO */ 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 */ 107 static 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 */ 161 162 int 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 (uflags & O_TRUNC) 182 ret |= P9_OTRUNC; 183 184 if (extended) { 185 if (uflags & O_EXCL) 186 ret |= P9_OEXCL; 187 188 if (uflags & O_APPEND) 189 ret |= P9_OAPPEND; 190 } 191 192 return ret; 193 } 194 195 /** 196 * v9fs_blank_wstat - helper function to setup a 9P stat structure 197 * @wstat: structure to initialize 198 * 199 */ 200 201 void 202 v9fs_blank_wstat(struct p9_wstat *wstat) 203 { 204 wstat->type = ~0; 205 wstat->dev = ~0; 206 wstat->qid.type = ~0; 207 wstat->qid.version = ~0; 208 *((long long *)&wstat->qid.path) = ~0; 209 wstat->mode = ~0; 210 wstat->atime = ~0; 211 wstat->mtime = ~0; 212 wstat->length = ~0; 213 wstat->name = NULL; 214 wstat->uid = NULL; 215 wstat->gid = NULL; 216 wstat->muid = NULL; 217 wstat->n_uid = INVALID_UID; 218 wstat->n_gid = INVALID_GID; 219 wstat->n_muid = INVALID_UID; 220 wstat->extension = NULL; 221 } 222 223 /** 224 * v9fs_alloc_inode - helper function to allocate an inode 225 * @sb: The superblock to allocate the inode from 226 */ 227 struct inode *v9fs_alloc_inode(struct super_block *sb) 228 { 229 struct v9fs_inode *v9inode; 230 231 v9inode = alloc_inode_sb(sb, v9fs_inode_cache, GFP_KERNEL); 232 if (!v9inode) 233 return NULL; 234 v9inode->cache_validity = 0; 235 mutex_init(&v9inode->v_mutex); 236 return &v9inode->netfs.inode; 237 } 238 239 /** 240 * v9fs_free_inode - destroy an inode 241 * @inode: The inode to be freed 242 */ 243 244 void v9fs_free_inode(struct inode *inode) 245 { 246 kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 247 } 248 249 /* 250 * Set parameters for the netfs library 251 */ 252 void v9fs_set_netfs_context(struct inode *inode) 253 { 254 struct v9fs_inode *v9inode = V9FS_I(inode); 255 netfs_inode_init(&v9inode->netfs, &v9fs_req_ops, true); 256 } 257 258 int v9fs_init_inode(struct v9fs_session_info *v9ses, 259 struct inode *inode, umode_t mode, dev_t rdev) 260 { 261 int err = 0; 262 263 inode_init_owner(&nop_mnt_idmap, inode, NULL, mode); 264 inode->i_blocks = 0; 265 inode->i_rdev = rdev; 266 simple_inode_init_ts(inode); 267 inode->i_mapping->a_ops = &v9fs_addr_operations; 268 inode->i_private = NULL; 269 270 switch (mode & S_IFMT) { 271 case S_IFIFO: 272 case S_IFBLK: 273 case S_IFCHR: 274 case S_IFSOCK: 275 if (v9fs_proto_dotl(v9ses)) { 276 inode->i_op = &v9fs_file_inode_operations_dotl; 277 } else if (v9fs_proto_dotu(v9ses)) { 278 inode->i_op = &v9fs_file_inode_operations; 279 } else { 280 p9_debug(P9_DEBUG_ERROR, 281 "special files without extended mode\n"); 282 err = -EINVAL; 283 goto error; 284 } 285 init_special_inode(inode, inode->i_mode, inode->i_rdev); 286 break; 287 case S_IFREG: 288 if (v9fs_proto_dotl(v9ses)) { 289 inode->i_op = &v9fs_file_inode_operations_dotl; 290 inode->i_fop = &v9fs_file_operations_dotl; 291 } else { 292 inode->i_op = &v9fs_file_inode_operations; 293 inode->i_fop = &v9fs_file_operations; 294 } 295 296 break; 297 case S_IFLNK: 298 if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 299 p9_debug(P9_DEBUG_ERROR, 300 "extended modes used with legacy protocol\n"); 301 err = -EINVAL; 302 goto error; 303 } 304 305 if (v9fs_proto_dotl(v9ses)) 306 inode->i_op = &v9fs_symlink_inode_operations_dotl; 307 else 308 inode->i_op = &v9fs_symlink_inode_operations; 309 310 break; 311 case S_IFDIR: 312 inc_nlink(inode); 313 if (v9fs_proto_dotl(v9ses)) 314 inode->i_op = &v9fs_dir_inode_operations_dotl; 315 else if (v9fs_proto_dotu(v9ses)) 316 inode->i_op = &v9fs_dir_inode_operations_dotu; 317 else 318 inode->i_op = &v9fs_dir_inode_operations; 319 320 if (v9fs_proto_dotl(v9ses)) 321 inode->i_fop = &v9fs_dir_operations_dotl; 322 else 323 inode->i_fop = &v9fs_dir_operations; 324 325 break; 326 default: 327 p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", 328 mode, mode & S_IFMT); 329 err = -EINVAL; 330 goto error; 331 } 332 error: 333 return err; 334 335 } 336 337 /** 338 * v9fs_evict_inode - Remove an inode from the inode cache 339 * @inode: inode to release 340 * 341 */ 342 void v9fs_evict_inode(struct inode *inode) 343 { 344 struct v9fs_inode __maybe_unused *v9inode = V9FS_I(inode); 345 __le32 __maybe_unused version; 346 347 if (!is_bad_inode(inode)) { 348 netfs_wait_for_outstanding_io(inode); 349 truncate_inode_pages_final(&inode->i_data); 350 351 version = cpu_to_le32(v9inode->qid.version); 352 netfs_clear_inode_writeback(inode, &version); 353 354 clear_inode(inode); 355 filemap_fdatawrite(&inode->i_data); 356 357 #ifdef CONFIG_9P_FSCACHE 358 if (v9fs_inode_cookie(v9inode)) 359 fscache_relinquish_cookie(v9fs_inode_cookie(v9inode), false); 360 #endif 361 } else 362 clear_inode(inode); 363 } 364 365 static int v9fs_test_inode(struct inode *inode, void *data) 366 { 367 int umode; 368 dev_t rdev; 369 struct v9fs_inode *v9inode = V9FS_I(inode); 370 struct p9_wstat *st = (struct p9_wstat *)data; 371 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 372 373 umode = p9mode2unixmode(v9ses, st, &rdev); 374 /* don't match inode of different type */ 375 if (inode_wrong_type(inode, umode)) 376 return 0; 377 378 /* compare qid details */ 379 if (memcmp(&v9inode->qid.version, 380 &st->qid.version, sizeof(v9inode->qid.version))) 381 return 0; 382 383 if (v9inode->qid.type != st->qid.type) 384 return 0; 385 386 if (v9inode->qid.path != st->qid.path) 387 return 0; 388 return 1; 389 } 390 391 static int v9fs_test_new_inode(struct inode *inode, void *data) 392 { 393 return 0; 394 } 395 396 static int v9fs_set_inode(struct inode *inode, void *data) 397 { 398 struct v9fs_inode *v9inode = V9FS_I(inode); 399 struct p9_wstat *st = (struct p9_wstat *)data; 400 401 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 402 return 0; 403 } 404 405 static struct inode *v9fs_qid_iget(struct super_block *sb, 406 struct p9_qid *qid, 407 struct p9_wstat *st, 408 int new) 409 { 410 dev_t rdev; 411 int retval; 412 umode_t umode; 413 struct inode *inode; 414 struct v9fs_session_info *v9ses = sb->s_fs_info; 415 int (*test)(struct inode *inode, void *data); 416 417 if (new) 418 test = v9fs_test_new_inode; 419 else 420 test = v9fs_test_inode; 421 422 inode = iget5_locked(sb, QID2INO(qid), test, v9fs_set_inode, st); 423 if (!inode) 424 return ERR_PTR(-ENOMEM); 425 if (!(inode->i_state & I_NEW)) 426 return inode; 427 /* 428 * initialize the inode with the stat info 429 * FIXME!! we may need support for stale inodes 430 * later. 431 */ 432 inode->i_ino = QID2INO(qid); 433 umode = p9mode2unixmode(v9ses, st, &rdev); 434 retval = v9fs_init_inode(v9ses, inode, umode, rdev); 435 if (retval) 436 goto error; 437 438 v9fs_stat2inode(st, inode, sb, 0); 439 v9fs_set_netfs_context(inode); 440 v9fs_cache_inode_get_cookie(inode); 441 unlock_new_inode(inode); 442 return inode; 443 error: 444 iget_failed(inode); 445 return ERR_PTR(retval); 446 447 } 448 449 struct inode * 450 v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 451 struct super_block *sb, int new) 452 { 453 struct p9_wstat *st; 454 struct inode *inode = NULL; 455 456 st = p9_client_stat(fid); 457 if (IS_ERR(st)) 458 return ERR_CAST(st); 459 460 inode = v9fs_qid_iget(sb, &st->qid, st, new); 461 p9stat_free(st); 462 kfree(st); 463 return inode; 464 } 465 466 /** 467 * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 468 * plan 9 AT flag. 469 * @flags: flags to convert 470 */ 471 static int v9fs_at_to_dotl_flags(int flags) 472 { 473 int rflags = 0; 474 475 if (flags & AT_REMOVEDIR) 476 rflags |= P9_DOTL_AT_REMOVEDIR; 477 478 return rflags; 479 } 480 481 /** 482 * v9fs_dec_count - helper functon to drop i_nlink. 483 * 484 * If a directory had nlink <= 2 (including . and ..), then we should not drop 485 * the link count, which indicates the underlying exported fs doesn't maintain 486 * nlink accurately. e.g. 487 * - overlayfs sets nlink to 1 for merged dir 488 * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more 489 * than EXT4_LINK_MAX (65000) links. 490 * 491 * @inode: inode whose nlink is being dropped 492 */ 493 static void v9fs_dec_count(struct inode *inode) 494 { 495 if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) 496 drop_nlink(inode); 497 } 498 499 /** 500 * v9fs_remove - helper function to remove files and directories 501 * @dir: directory inode that is being deleted 502 * @dentry: dentry that is being deleted 503 * @flags: removing a directory 504 * 505 */ 506 507 static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 508 { 509 struct inode *inode; 510 int retval = -EOPNOTSUPP; 511 struct p9_fid *v9fid, *dfid; 512 struct v9fs_session_info *v9ses; 513 514 p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 515 dir, dentry, flags); 516 517 v9ses = v9fs_inode2v9ses(dir); 518 inode = d_inode(dentry); 519 dfid = v9fs_parent_fid(dentry); 520 if (IS_ERR(dfid)) { 521 retval = PTR_ERR(dfid); 522 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 523 return retval; 524 } 525 if (v9fs_proto_dotl(v9ses)) 526 retval = p9_client_unlinkat(dfid, dentry->d_name.name, 527 v9fs_at_to_dotl_flags(flags)); 528 p9_fid_put(dfid); 529 if (retval == -EOPNOTSUPP) { 530 /* Try the one based on path */ 531 v9fid = v9fs_fid_clone(dentry); 532 if (IS_ERR(v9fid)) 533 return PTR_ERR(v9fid); 534 retval = p9_client_remove(v9fid); 535 } 536 if (!retval) { 537 /* 538 * directories on unlink should have zero 539 * link count 540 */ 541 if (flags & AT_REMOVEDIR) { 542 clear_nlink(inode); 543 v9fs_dec_count(dir); 544 } else 545 v9fs_dec_count(inode); 546 547 v9fs_invalidate_inode_attr(inode); 548 v9fs_invalidate_inode_attr(dir); 549 550 /* invalidate all fids associated with dentry */ 551 /* NOTE: This will not include open fids */ 552 dentry->d_op->d_release(dentry); 553 } 554 return retval; 555 } 556 557 /** 558 * v9fs_create - Create a file 559 * @v9ses: session information 560 * @dir: directory that dentry is being created in 561 * @dentry: dentry that is being created 562 * @extension: 9p2000.u extension string to support devices, etc. 563 * @perm: create permissions 564 * @mode: open mode 565 * 566 */ 567 static struct p9_fid * 568 v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 569 struct dentry *dentry, char *extension, u32 perm, u8 mode) 570 { 571 int err; 572 const unsigned char *name; 573 struct p9_fid *dfid, *ofid = NULL, *fid = NULL; 574 struct inode *inode; 575 576 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 577 578 name = dentry->d_name.name; 579 dfid = v9fs_parent_fid(dentry); 580 if (IS_ERR(dfid)) { 581 err = PTR_ERR(dfid); 582 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 583 return ERR_PTR(err); 584 } 585 586 /* clone a fid to use for creation */ 587 ofid = clone_fid(dfid); 588 if (IS_ERR(ofid)) { 589 err = PTR_ERR(ofid); 590 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 591 goto error; 592 } 593 594 err = p9_client_fcreate(ofid, name, perm, mode, extension); 595 if (err < 0) { 596 p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 597 goto error; 598 } 599 600 if (!(perm & P9_DMLINK)) { 601 /* now walk from the parent so we can get unopened fid */ 602 fid = p9_client_walk(dfid, 1, &name, 1); 603 if (IS_ERR(fid)) { 604 err = PTR_ERR(fid); 605 p9_debug(P9_DEBUG_VFS, 606 "p9_client_walk failed %d\n", err); 607 goto error; 608 } 609 /* 610 * instantiate inode and assign the unopened fid to the dentry 611 */ 612 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 613 if (IS_ERR(inode)) { 614 err = PTR_ERR(inode); 615 p9_debug(P9_DEBUG_VFS, 616 "inode creation failed %d\n", err); 617 goto error; 618 } 619 v9fs_fid_add(dentry, &fid); 620 d_instantiate(dentry, inode); 621 } 622 p9_fid_put(dfid); 623 return ofid; 624 error: 625 p9_fid_put(dfid); 626 p9_fid_put(ofid); 627 p9_fid_put(fid); 628 return ERR_PTR(err); 629 } 630 631 /** 632 * v9fs_vfs_create - VFS hook to create a regular file 633 * @idmap: idmap of the mount 634 * @dir: The parent directory 635 * @dentry: The name of file to be created 636 * @mode: The UNIX file mode to set 637 * @excl: True if the file must not yet exist 638 * 639 * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 640 * for mknod(2). 641 * 642 */ 643 644 static int 645 v9fs_vfs_create(struct mnt_idmap *idmap, struct inode *dir, 646 struct dentry *dentry, umode_t mode, bool excl) 647 { 648 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 649 u32 perm = unixmode2p9mode(v9ses, mode); 650 struct p9_fid *fid; 651 652 /* P9_OEXCL? */ 653 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 654 if (IS_ERR(fid)) 655 return PTR_ERR(fid); 656 657 v9fs_invalidate_inode_attr(dir); 658 p9_fid_put(fid); 659 660 return 0; 661 } 662 663 /** 664 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 665 * @idmap: idmap of the mount 666 * @dir: inode that is being unlinked 667 * @dentry: dentry that is being unlinked 668 * @mode: mode for new directory 669 * 670 */ 671 672 static struct dentry *v9fs_vfs_mkdir(struct mnt_idmap *idmap, struct inode *dir, 673 struct dentry *dentry, umode_t mode) 674 { 675 int err; 676 u32 perm; 677 struct p9_fid *fid; 678 struct v9fs_session_info *v9ses; 679 680 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 681 err = 0; 682 v9ses = v9fs_inode2v9ses(dir); 683 perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 684 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 685 if (IS_ERR(fid)) { 686 err = PTR_ERR(fid); 687 fid = NULL; 688 } else { 689 inc_nlink(dir); 690 v9fs_invalidate_inode_attr(dir); 691 } 692 693 if (fid) 694 p9_fid_put(fid); 695 return ERR_PTR(err); 696 } 697 698 /** 699 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 700 * @dir: inode that is being walked from 701 * @dentry: dentry that is being walked to? 702 * @flags: lookup flags (unused) 703 * 704 */ 705 706 struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 707 unsigned int flags) 708 { 709 struct dentry *res; 710 struct v9fs_session_info *v9ses; 711 struct p9_fid *dfid, *fid; 712 struct inode *inode; 713 const unsigned char *name; 714 715 p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 716 dir, dentry, dentry, flags); 717 718 if (dentry->d_name.len > NAME_MAX) 719 return ERR_PTR(-ENAMETOOLONG); 720 721 v9ses = v9fs_inode2v9ses(dir); 722 /* We can walk d_parent because we hold the dir->i_mutex */ 723 dfid = v9fs_parent_fid(dentry); 724 if (IS_ERR(dfid)) 725 return ERR_CAST(dfid); 726 727 /* 728 * Make sure we don't use a wrong inode due to parallel 729 * unlink. For cached mode create calls request for new 730 * inode. But with cache disabled, lookup should do this. 731 */ 732 name = dentry->d_name.name; 733 fid = p9_client_walk(dfid, 1, &name, 1); 734 p9_fid_put(dfid); 735 if (fid == ERR_PTR(-ENOENT)) 736 inode = NULL; 737 else if (IS_ERR(fid)) 738 inode = ERR_CAST(fid); 739 else if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) 740 inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 741 else 742 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 743 /* 744 * If we had a rename on the server and a parallel lookup 745 * for the new name, then make sure we instantiate with 746 * the new name. ie look up for a/b, while on server somebody 747 * moved b under k and client parallely did a lookup for 748 * k/b. 749 */ 750 res = d_splice_alias(inode, dentry); 751 if (!IS_ERR(fid)) { 752 if (!res) 753 v9fs_fid_add(dentry, &fid); 754 else if (!IS_ERR(res)) 755 v9fs_fid_add(res, &fid); 756 else 757 p9_fid_put(fid); 758 } 759 return res; 760 } 761 762 static int 763 v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 764 struct file *file, unsigned int flags, umode_t mode) 765 { 766 int err; 767 u32 perm; 768 struct v9fs_inode __maybe_unused *v9inode; 769 struct v9fs_session_info *v9ses; 770 struct p9_fid *fid; 771 struct inode *inode; 772 int p9_omode; 773 774 if (d_in_lookup(dentry)) { 775 struct dentry *res = v9fs_vfs_lookup(dir, dentry, 0); 776 if (res || d_really_is_positive(dentry)) 777 return finish_no_open(file, res); 778 } 779 780 /* Only creates */ 781 if (!(flags & O_CREAT)) 782 return finish_no_open(file, NULL); 783 784 v9ses = v9fs_inode2v9ses(dir); 785 perm = unixmode2p9mode(v9ses, mode); 786 p9_omode = v9fs_uflags2omode(flags, v9fs_proto_dotu(v9ses)); 787 788 if ((v9ses->cache & CACHE_WRITEBACK) && (p9_omode & P9_OWRITE)) { 789 p9_omode = (p9_omode & ~P9_OWRITE) | P9_ORDWR; 790 p9_debug(P9_DEBUG_CACHE, 791 "write-only file with writeback enabled, creating w/ O_RDWR\n"); 792 } 793 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, p9_omode); 794 if (IS_ERR(fid)) 795 return PTR_ERR(fid); 796 797 v9fs_invalidate_inode_attr(dir); 798 inode = d_inode(dentry); 799 v9inode = V9FS_I(inode); 800 err = finish_open(file, dentry, generic_file_open); 801 if (unlikely(err)) { 802 p9_fid_put(fid); 803 return err; 804 } 805 806 file->private_data = fid; 807 #ifdef CONFIG_9P_FSCACHE 808 if (v9ses->cache & CACHE_FSCACHE) 809 fscache_use_cookie(v9fs_inode_cookie(v9inode), 810 file->f_mode & FMODE_WRITE); 811 #endif 812 813 v9fs_fid_add_modes(fid, v9ses->flags, v9ses->cache, file->f_flags); 814 v9fs_open_fid_add(inode, &fid); 815 816 file->f_mode |= FMODE_CREATED; 817 return 0; 818 } 819 820 /** 821 * v9fs_vfs_unlink - VFS unlink hook to delete an inode 822 * @i: inode that is being unlinked 823 * @d: dentry that is being unlinked 824 * 825 */ 826 827 int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 828 { 829 return v9fs_remove(i, d, 0); 830 } 831 832 /** 833 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 834 * @i: inode that is being unlinked 835 * @d: dentry that is being unlinked 836 * 837 */ 838 839 int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 840 { 841 return v9fs_remove(i, d, AT_REMOVEDIR); 842 } 843 844 /** 845 * v9fs_vfs_rename - VFS hook to rename an inode 846 * @idmap: The idmap of the mount 847 * @old_dir: old dir inode 848 * @old_dentry: old dentry 849 * @new_dir: new dir inode 850 * @new_dentry: new dentry 851 * @flags: RENAME_* flags 852 * 853 */ 854 855 int 856 v9fs_vfs_rename(struct mnt_idmap *idmap, struct inode *old_dir, 857 struct dentry *old_dentry, struct inode *new_dir, 858 struct dentry *new_dentry, unsigned int flags) 859 { 860 int retval; 861 struct inode *old_inode; 862 struct inode *new_inode; 863 struct v9fs_session_info *v9ses; 864 struct p9_fid *oldfid = NULL, *dfid = NULL; 865 struct p9_fid *olddirfid = NULL; 866 struct p9_fid *newdirfid = NULL; 867 struct p9_wstat wstat; 868 869 if (flags) 870 return -EINVAL; 871 872 p9_debug(P9_DEBUG_VFS, "\n"); 873 old_inode = d_inode(old_dentry); 874 new_inode = d_inode(new_dentry); 875 v9ses = v9fs_inode2v9ses(old_inode); 876 oldfid = v9fs_fid_lookup(old_dentry); 877 if (IS_ERR(oldfid)) 878 return PTR_ERR(oldfid); 879 880 dfid = v9fs_parent_fid(old_dentry); 881 olddirfid = clone_fid(dfid); 882 p9_fid_put(dfid); 883 dfid = NULL; 884 885 if (IS_ERR(olddirfid)) { 886 retval = PTR_ERR(olddirfid); 887 goto error; 888 } 889 890 dfid = v9fs_parent_fid(new_dentry); 891 newdirfid = clone_fid(dfid); 892 p9_fid_put(dfid); 893 dfid = NULL; 894 895 if (IS_ERR(newdirfid)) { 896 retval = PTR_ERR(newdirfid); 897 goto error; 898 } 899 900 down_write(&v9ses->rename_sem); 901 if (v9fs_proto_dotl(v9ses)) { 902 retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 903 newdirfid, new_dentry->d_name.name); 904 if (retval == -EOPNOTSUPP) 905 retval = p9_client_rename(oldfid, newdirfid, 906 new_dentry->d_name.name); 907 if (retval != -EOPNOTSUPP) 908 goto error_locked; 909 } 910 if (old_dentry->d_parent != new_dentry->d_parent) { 911 /* 912 * 9P .u can only handle file rename in the same directory 913 */ 914 915 p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 916 retval = -EXDEV; 917 goto error_locked; 918 } 919 v9fs_blank_wstat(&wstat); 920 wstat.muid = v9ses->uname; 921 wstat.name = new_dentry->d_name.name; 922 retval = p9_client_wstat(oldfid, &wstat); 923 924 error_locked: 925 if (!retval) { 926 if (new_inode) { 927 if (S_ISDIR(new_inode->i_mode)) 928 clear_nlink(new_inode); 929 else 930 v9fs_dec_count(new_inode); 931 } 932 if (S_ISDIR(old_inode->i_mode)) { 933 if (!new_inode) 934 inc_nlink(new_dir); 935 v9fs_dec_count(old_dir); 936 } 937 v9fs_invalidate_inode_attr(old_inode); 938 v9fs_invalidate_inode_attr(old_dir); 939 v9fs_invalidate_inode_attr(new_dir); 940 941 /* successful rename */ 942 d_move(old_dentry, new_dentry); 943 } 944 up_write(&v9ses->rename_sem); 945 946 error: 947 p9_fid_put(newdirfid); 948 p9_fid_put(olddirfid); 949 p9_fid_put(oldfid); 950 return retval; 951 } 952 953 /** 954 * v9fs_vfs_getattr - retrieve file metadata 955 * @idmap: idmap of the mount 956 * @path: Object to query 957 * @stat: metadata structure to populate 958 * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 959 * @flags: AT_STATX_xxx setting 960 * 961 */ 962 963 static int 964 v9fs_vfs_getattr(struct mnt_idmap *idmap, const struct path *path, 965 struct kstat *stat, u32 request_mask, unsigned int flags) 966 { 967 struct dentry *dentry = path->dentry; 968 struct inode *inode = d_inode(dentry); 969 struct v9fs_session_info *v9ses; 970 struct p9_fid *fid; 971 struct p9_wstat *st; 972 973 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 974 v9ses = v9fs_dentry2v9ses(dentry); 975 if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) { 976 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat); 977 return 0; 978 } else if (v9ses->cache & CACHE_WRITEBACK) { 979 if (S_ISREG(inode->i_mode)) { 980 int retval = filemap_fdatawrite(inode->i_mapping); 981 982 if (retval) 983 p9_debug(P9_DEBUG_ERROR, 984 "flushing writeback during getattr returned %d\n", retval); 985 } 986 } 987 fid = v9fs_fid_lookup(dentry); 988 if (IS_ERR(fid)) 989 return PTR_ERR(fid); 990 991 st = p9_client_stat(fid); 992 p9_fid_put(fid); 993 if (IS_ERR(st)) 994 return PTR_ERR(st); 995 996 v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); 997 generic_fillattr(&nop_mnt_idmap, request_mask, d_inode(dentry), stat); 998 999 p9stat_free(st); 1000 kfree(st); 1001 return 0; 1002 } 1003 1004 /** 1005 * v9fs_vfs_setattr - set file metadata 1006 * @idmap: idmap of the mount 1007 * @dentry: file whose metadata to set 1008 * @iattr: metadata assignment structure 1009 * 1010 */ 1011 1012 static int v9fs_vfs_setattr(struct mnt_idmap *idmap, 1013 struct dentry *dentry, struct iattr *iattr) 1014 { 1015 int retval, use_dentry = 0; 1016 struct inode *inode = d_inode(dentry); 1017 struct v9fs_session_info *v9ses; 1018 struct p9_fid *fid = NULL; 1019 struct p9_wstat wstat; 1020 1021 p9_debug(P9_DEBUG_VFS, "\n"); 1022 retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr); 1023 if (retval) 1024 return retval; 1025 1026 v9ses = v9fs_dentry2v9ses(dentry); 1027 if (iattr->ia_valid & ATTR_FILE) { 1028 fid = iattr->ia_file->private_data; 1029 WARN_ON(!fid); 1030 } 1031 if (!fid) { 1032 fid = v9fs_fid_lookup(dentry); 1033 use_dentry = 1; 1034 } 1035 if (IS_ERR(fid)) 1036 return PTR_ERR(fid); 1037 1038 v9fs_blank_wstat(&wstat); 1039 if (iattr->ia_valid & ATTR_MODE) 1040 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 1041 1042 if (iattr->ia_valid & ATTR_MTIME) 1043 wstat.mtime = iattr->ia_mtime.tv_sec; 1044 1045 if (iattr->ia_valid & ATTR_ATIME) 1046 wstat.atime = iattr->ia_atime.tv_sec; 1047 1048 if (iattr->ia_valid & ATTR_SIZE) 1049 wstat.length = iattr->ia_size; 1050 1051 if (v9fs_proto_dotu(v9ses)) { 1052 if (iattr->ia_valid & ATTR_UID) 1053 wstat.n_uid = iattr->ia_uid; 1054 1055 if (iattr->ia_valid & ATTR_GID) 1056 wstat.n_gid = iattr->ia_gid; 1057 } 1058 1059 /* Write all dirty data */ 1060 if (d_is_reg(dentry)) { 1061 retval = filemap_fdatawrite(inode->i_mapping); 1062 if (retval) 1063 p9_debug(P9_DEBUG_ERROR, 1064 "flushing writeback during setattr returned %d\n", retval); 1065 } 1066 1067 retval = p9_client_wstat(fid, &wstat); 1068 1069 if (use_dentry) 1070 p9_fid_put(fid); 1071 1072 if (retval < 0) 1073 return retval; 1074 1075 if ((iattr->ia_valid & ATTR_SIZE) && 1076 iattr->ia_size != i_size_read(inode)) { 1077 truncate_setsize(inode, iattr->ia_size); 1078 netfs_resize_file(netfs_inode(inode), iattr->ia_size, true); 1079 1080 #ifdef CONFIG_9P_FSCACHE 1081 if (v9ses->cache & CACHE_FSCACHE) { 1082 struct v9fs_inode *v9inode = V9FS_I(inode); 1083 1084 fscache_resize_cookie(v9fs_inode_cookie(v9inode), iattr->ia_size); 1085 } 1086 #endif 1087 } 1088 1089 v9fs_invalidate_inode_attr(inode); 1090 1091 setattr_copy(&nop_mnt_idmap, inode, iattr); 1092 mark_inode_dirty(inode); 1093 return 0; 1094 } 1095 1096 /** 1097 * v9fs_stat2inode - populate an inode structure with mistat info 1098 * @stat: Plan 9 metadata (mistat) structure 1099 * @inode: inode to populate 1100 * @sb: superblock of filesystem 1101 * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) 1102 * 1103 */ 1104 1105 void 1106 v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 1107 struct super_block *sb, unsigned int flags) 1108 { 1109 umode_t mode; 1110 struct v9fs_session_info *v9ses = sb->s_fs_info; 1111 struct v9fs_inode *v9inode = V9FS_I(inode); 1112 1113 inode_set_atime(inode, stat->atime, 0); 1114 inode_set_mtime(inode, stat->mtime, 0); 1115 inode_set_ctime(inode, stat->mtime, 0); 1116 1117 inode->i_uid = v9ses->dfltuid; 1118 inode->i_gid = v9ses->dfltgid; 1119 1120 if (v9fs_proto_dotu(v9ses)) { 1121 inode->i_uid = stat->n_uid; 1122 inode->i_gid = stat->n_gid; 1123 } 1124 if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 1125 if (v9fs_proto_dotu(v9ses)) { 1126 unsigned int i_nlink; 1127 /* 1128 * Hadlink support got added later to the .u extension. 1129 * So there can be a server out there that doesn't 1130 * support this even with .u extension. That would 1131 * just leave us with stat->extension being an empty 1132 * string, though. 1133 */ 1134 /* HARDLINKCOUNT %u */ 1135 if (sscanf(stat->extension, 1136 " HARDLINKCOUNT %u", &i_nlink) == 1) 1137 set_nlink(inode, i_nlink); 1138 } 1139 } 1140 mode = p9mode2perm(v9ses, stat); 1141 mode |= inode->i_mode & ~S_IALLUGO; 1142 inode->i_mode = mode; 1143 1144 v9inode->netfs.remote_i_size = stat->length; 1145 if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) 1146 v9fs_i_size_write(inode, stat->length); 1147 /* not real number of blocks, but 512 byte ones ... */ 1148 inode->i_blocks = (stat->length + 512 - 1) >> 9; 1149 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 1150 } 1151 1152 /** 1153 * v9fs_vfs_get_link - follow a symlink path 1154 * @dentry: dentry for symlink 1155 * @inode: inode for symlink 1156 * @done: delayed call for when we are done with the return value 1157 */ 1158 1159 static const char *v9fs_vfs_get_link(struct dentry *dentry, 1160 struct inode *inode, 1161 struct delayed_call *done) 1162 { 1163 struct v9fs_session_info *v9ses; 1164 struct p9_fid *fid; 1165 struct p9_wstat *st; 1166 char *res; 1167 1168 if (!dentry) 1169 return ERR_PTR(-ECHILD); 1170 1171 v9ses = v9fs_dentry2v9ses(dentry); 1172 if (!v9fs_proto_dotu(v9ses)) 1173 return ERR_PTR(-EBADF); 1174 1175 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 1176 fid = v9fs_fid_lookup(dentry); 1177 1178 if (IS_ERR(fid)) 1179 return ERR_CAST(fid); 1180 1181 st = p9_client_stat(fid); 1182 p9_fid_put(fid); 1183 if (IS_ERR(st)) 1184 return ERR_CAST(st); 1185 1186 if (!(st->mode & P9_DMSYMLINK)) { 1187 p9stat_free(st); 1188 kfree(st); 1189 return ERR_PTR(-EINVAL); 1190 } 1191 res = st->extension; 1192 st->extension = NULL; 1193 if (strlen(res) >= PATH_MAX) 1194 res[PATH_MAX - 1] = '\0'; 1195 1196 p9stat_free(st); 1197 kfree(st); 1198 set_delayed_call(done, kfree_link, res); 1199 return res; 1200 } 1201 1202 /** 1203 * v9fs_vfs_mkspecial - create a special file 1204 * @dir: inode to create special file in 1205 * @dentry: dentry to create 1206 * @perm: mode to create special file 1207 * @extension: 9p2000.u format extension string representing special file 1208 * 1209 */ 1210 1211 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1212 u32 perm, const char *extension) 1213 { 1214 struct p9_fid *fid; 1215 struct v9fs_session_info *v9ses; 1216 1217 v9ses = v9fs_inode2v9ses(dir); 1218 if (!v9fs_proto_dotu(v9ses)) { 1219 p9_debug(P9_DEBUG_ERROR, "not extended\n"); 1220 return -EPERM; 1221 } 1222 1223 fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1224 P9_OREAD); 1225 if (IS_ERR(fid)) 1226 return PTR_ERR(fid); 1227 1228 v9fs_invalidate_inode_attr(dir); 1229 p9_fid_put(fid); 1230 return 0; 1231 } 1232 1233 /** 1234 * v9fs_vfs_symlink - helper function to create symlinks 1235 * @idmap: idmap of the mount 1236 * @dir: directory inode containing symlink 1237 * @dentry: dentry for symlink 1238 * @symname: symlink data 1239 * 1240 * See Also: 9P2000.u RFC for more information 1241 * 1242 */ 1243 1244 static int 1245 v9fs_vfs_symlink(struct mnt_idmap *idmap, struct inode *dir, 1246 struct dentry *dentry, const char *symname) 1247 { 1248 p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 1249 dir->i_ino, dentry, symname); 1250 1251 return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1252 } 1253 1254 #define U32_MAX_DIGITS 10 1255 1256 /** 1257 * v9fs_vfs_link - create a hardlink 1258 * @old_dentry: dentry for file to link to 1259 * @dir: inode destination for new link 1260 * @dentry: dentry for link 1261 * 1262 */ 1263 1264 static int 1265 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 1266 struct dentry *dentry) 1267 { 1268 int retval; 1269 char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1270 struct p9_fid *oldfid; 1271 1272 p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 1273 dir->i_ino, dentry, old_dentry); 1274 1275 oldfid = v9fs_fid_clone(old_dentry); 1276 if (IS_ERR(oldfid)) 1277 return PTR_ERR(oldfid); 1278 1279 sprintf(name, "%d\n", oldfid->fid); 1280 retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1281 if (!retval) { 1282 v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1283 v9fs_invalidate_inode_attr(dir); 1284 } 1285 p9_fid_put(oldfid); 1286 return retval; 1287 } 1288 1289 /** 1290 * v9fs_vfs_mknod - create a special file 1291 * @idmap: idmap of the mount 1292 * @dir: inode destination for new link 1293 * @dentry: dentry for file 1294 * @mode: mode for creation 1295 * @rdev: device associated with special file 1296 * 1297 */ 1298 1299 static int 1300 v9fs_vfs_mknod(struct mnt_idmap *idmap, struct inode *dir, 1301 struct dentry *dentry, umode_t mode, dev_t rdev) 1302 { 1303 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1304 int retval; 1305 char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1306 u32 perm; 1307 1308 p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", 1309 dir->i_ino, dentry, mode, 1310 MAJOR(rdev), MINOR(rdev)); 1311 1312 /* build extension */ 1313 if (S_ISBLK(mode)) 1314 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 1315 else if (S_ISCHR(mode)) 1316 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1317 else 1318 *name = 0; 1319 1320 perm = unixmode2p9mode(v9ses, mode); 1321 retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 1322 1323 return retval; 1324 } 1325 1326 int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1327 { 1328 int umode; 1329 dev_t rdev; 1330 struct p9_wstat *st; 1331 struct v9fs_session_info *v9ses; 1332 unsigned int flags; 1333 1334 v9ses = v9fs_inode2v9ses(inode); 1335 st = p9_client_stat(fid); 1336 if (IS_ERR(st)) 1337 return PTR_ERR(st); 1338 /* 1339 * Don't update inode if the file type is different 1340 */ 1341 umode = p9mode2unixmode(v9ses, st, &rdev); 1342 if (inode_wrong_type(inode, umode)) 1343 goto out; 1344 1345 /* 1346 * We don't want to refresh inode->i_size, 1347 * because we may have cached data 1348 */ 1349 flags = (v9ses->cache & CACHE_LOOSE) ? 1350 V9FS_STAT2INODE_KEEP_ISIZE : 0; 1351 v9fs_stat2inode(st, inode, inode->i_sb, flags); 1352 out: 1353 p9stat_free(st); 1354 kfree(st); 1355 return 0; 1356 } 1357 1358 static const struct inode_operations v9fs_dir_inode_operations_dotu = { 1359 .create = v9fs_vfs_create, 1360 .lookup = v9fs_vfs_lookup, 1361 .atomic_open = v9fs_vfs_atomic_open, 1362 .symlink = v9fs_vfs_symlink, 1363 .link = v9fs_vfs_link, 1364 .unlink = v9fs_vfs_unlink, 1365 .mkdir = v9fs_vfs_mkdir, 1366 .rmdir = v9fs_vfs_rmdir, 1367 .mknod = v9fs_vfs_mknod, 1368 .rename = v9fs_vfs_rename, 1369 .getattr = v9fs_vfs_getattr, 1370 .setattr = v9fs_vfs_setattr, 1371 }; 1372 1373 static const struct inode_operations v9fs_dir_inode_operations = { 1374 .create = v9fs_vfs_create, 1375 .lookup = v9fs_vfs_lookup, 1376 .atomic_open = v9fs_vfs_atomic_open, 1377 .unlink = v9fs_vfs_unlink, 1378 .mkdir = v9fs_vfs_mkdir, 1379 .rmdir = v9fs_vfs_rmdir, 1380 .mknod = v9fs_vfs_mknod, 1381 .rename = v9fs_vfs_rename, 1382 .getattr = v9fs_vfs_getattr, 1383 .setattr = v9fs_vfs_setattr, 1384 }; 1385 1386 static const struct inode_operations v9fs_file_inode_operations = { 1387 .getattr = v9fs_vfs_getattr, 1388 .setattr = v9fs_vfs_setattr, 1389 }; 1390 1391 static const struct inode_operations v9fs_symlink_inode_operations = { 1392 .get_link = v9fs_vfs_get_link, 1393 .getattr = v9fs_vfs_getattr, 1394 .setattr = v9fs_vfs_setattr, 1395 }; 1396 1397