1 /* 2 * linux/fs/9p/vfs_inode.c 3 * 4 * This file contains vfs inode ops for the 9P2000 protocol. 5 * 6 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> 7 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 11 * as published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to: 20 * Free Software Foundation 21 * 51 Franklin Street, Fifth Floor 22 * Boston, MA 02111-1301 USA 23 * 24 */ 25 26 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 27 28 #include <linux/module.h> 29 #include <linux/errno.h> 30 #include <linux/fs.h> 31 #include <linux/file.h> 32 #include <linux/pagemap.h> 33 #include <linux/stat.h> 34 #include <linux/string.h> 35 #include <linux/inet.h> 36 #include <linux/namei.h> 37 #include <linux/idr.h> 38 #include <linux/sched.h> 39 #include <linux/slab.h> 40 #include <linux/xattr.h> 41 #include <linux/posix_acl.h> 42 #include <net/9p/9p.h> 43 #include <net/9p/client.h> 44 45 #include "v9fs.h" 46 #include "v9fs_vfs.h" 47 #include "fid.h" 48 #include "cache.h" 49 #include "xattr.h" 50 #include "acl.h" 51 52 static const struct inode_operations v9fs_dir_inode_operations; 53 static const struct inode_operations v9fs_dir_inode_operations_dotu; 54 static const struct inode_operations v9fs_file_inode_operations; 55 static const struct inode_operations v9fs_symlink_inode_operations; 56 57 /** 58 * unixmode2p9mode - convert unix mode bits to plan 9 59 * @v9ses: v9fs session information 60 * @mode: mode to convert 61 * 62 */ 63 64 static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode) 65 { 66 int res; 67 res = mode & 0777; 68 if (S_ISDIR(mode)) 69 res |= P9_DMDIR; 70 if (v9fs_proto_dotu(v9ses)) { 71 if (v9ses->nodev == 0) { 72 if (S_ISSOCK(mode)) 73 res |= P9_DMSOCKET; 74 if (S_ISFIFO(mode)) 75 res |= P9_DMNAMEDPIPE; 76 if (S_ISBLK(mode)) 77 res |= P9_DMDEVICE; 78 if (S_ISCHR(mode)) 79 res |= P9_DMDEVICE; 80 } 81 82 if ((mode & S_ISUID) == S_ISUID) 83 res |= P9_DMSETUID; 84 if ((mode & S_ISGID) == S_ISGID) 85 res |= P9_DMSETGID; 86 if ((mode & S_ISVTX) == S_ISVTX) 87 res |= P9_DMSETVTX; 88 } 89 return res; 90 } 91 92 /** 93 * p9mode2perm- convert plan9 mode bits to unix permission bits 94 * @v9ses: v9fs session information 95 * @stat: p9_wstat from which mode need to be derived 96 * 97 */ 98 static int p9mode2perm(struct v9fs_session_info *v9ses, 99 struct p9_wstat *stat) 100 { 101 int res; 102 int mode = stat->mode; 103 104 res = mode & S_IALLUGO; 105 if (v9fs_proto_dotu(v9ses)) { 106 if ((mode & P9_DMSETUID) == P9_DMSETUID) 107 res |= S_ISUID; 108 109 if ((mode & P9_DMSETGID) == P9_DMSETGID) 110 res |= S_ISGID; 111 112 if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 113 res |= S_ISVTX; 114 } 115 return res; 116 } 117 118 /** 119 * p9mode2unixmode- convert plan9 mode bits to unix mode bits 120 * @v9ses: v9fs session information 121 * @stat: p9_wstat from which mode need to be derived 122 * @rdev: major number, minor number in case of device files. 123 * 124 */ 125 static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, 126 struct p9_wstat *stat, dev_t *rdev) 127 { 128 int res; 129 u32 mode = stat->mode; 130 131 *rdev = 0; 132 res = p9mode2perm(v9ses, stat); 133 134 if ((mode & P9_DMDIR) == P9_DMDIR) 135 res |= S_IFDIR; 136 else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 137 res |= S_IFLNK; 138 else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 139 && (v9ses->nodev == 0)) 140 res |= S_IFSOCK; 141 else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 142 && (v9ses->nodev == 0)) 143 res |= S_IFIFO; 144 else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 145 && (v9ses->nodev == 0)) { 146 char type = 0, ext[32]; 147 int major = -1, minor = -1; 148 149 strlcpy(ext, stat->extension, sizeof(ext)); 150 sscanf(ext, "%c %i %i", &type, &major, &minor); 151 switch (type) { 152 case 'c': 153 res |= S_IFCHR; 154 break; 155 case 'b': 156 res |= S_IFBLK; 157 break; 158 default: 159 p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", 160 type, stat->extension); 161 }; 162 *rdev = MKDEV(major, minor); 163 } else 164 res |= S_IFREG; 165 166 return res; 167 } 168 169 /** 170 * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 171 * @uflags: flags to convert 172 * @extended: if .u extensions are active 173 */ 174 175 int v9fs_uflags2omode(int uflags, int extended) 176 { 177 int ret; 178 179 ret = 0; 180 switch (uflags&3) { 181 default: 182 case O_RDONLY: 183 ret = P9_OREAD; 184 break; 185 186 case O_WRONLY: 187 ret = P9_OWRITE; 188 break; 189 190 case O_RDWR: 191 ret = P9_ORDWR; 192 break; 193 } 194 195 if (extended) { 196 if (uflags & O_EXCL) 197 ret |= P9_OEXCL; 198 199 if (uflags & O_APPEND) 200 ret |= P9_OAPPEND; 201 } 202 203 return ret; 204 } 205 206 /** 207 * v9fs_blank_wstat - helper function to setup a 9P stat structure 208 * @wstat: structure to initialize 209 * 210 */ 211 212 void 213 v9fs_blank_wstat(struct p9_wstat *wstat) 214 { 215 wstat->type = ~0; 216 wstat->dev = ~0; 217 wstat->qid.type = ~0; 218 wstat->qid.version = ~0; 219 *((long long *)&wstat->qid.path) = ~0; 220 wstat->mode = ~0; 221 wstat->atime = ~0; 222 wstat->mtime = ~0; 223 wstat->length = ~0; 224 wstat->name = NULL; 225 wstat->uid = NULL; 226 wstat->gid = NULL; 227 wstat->muid = NULL; 228 wstat->n_uid = INVALID_UID; 229 wstat->n_gid = INVALID_GID; 230 wstat->n_muid = INVALID_UID; 231 wstat->extension = NULL; 232 } 233 234 /** 235 * v9fs_alloc_inode - helper function to allocate an inode 236 * 237 */ 238 struct inode *v9fs_alloc_inode(struct super_block *sb) 239 { 240 struct v9fs_inode *v9inode; 241 v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache, 242 GFP_KERNEL); 243 if (!v9inode) 244 return NULL; 245 #ifdef CONFIG_9P_FSCACHE 246 v9inode->fscache = NULL; 247 mutex_init(&v9inode->fscache_lock); 248 #endif 249 v9inode->writeback_fid = NULL; 250 v9inode->cache_validity = 0; 251 mutex_init(&v9inode->v_mutex); 252 return &v9inode->vfs_inode; 253 } 254 255 /** 256 * v9fs_destroy_inode - destroy an inode 257 * 258 */ 259 260 static void v9fs_i_callback(struct rcu_head *head) 261 { 262 struct inode *inode = container_of(head, struct inode, i_rcu); 263 kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 264 } 265 266 void v9fs_destroy_inode(struct inode *inode) 267 { 268 call_rcu(&inode->i_rcu, v9fs_i_callback); 269 } 270 271 int v9fs_init_inode(struct v9fs_session_info *v9ses, 272 struct inode *inode, umode_t mode, dev_t rdev) 273 { 274 int err = 0; 275 276 inode_init_owner(inode, NULL, mode); 277 inode->i_blocks = 0; 278 inode->i_rdev = rdev; 279 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 280 inode->i_mapping->a_ops = &v9fs_addr_operations; 281 282 switch (mode & S_IFMT) { 283 case S_IFIFO: 284 case S_IFBLK: 285 case S_IFCHR: 286 case S_IFSOCK: 287 if (v9fs_proto_dotl(v9ses)) { 288 inode->i_op = &v9fs_file_inode_operations_dotl; 289 } else if (v9fs_proto_dotu(v9ses)) { 290 inode->i_op = &v9fs_file_inode_operations; 291 } else { 292 p9_debug(P9_DEBUG_ERROR, 293 "special files without extended mode\n"); 294 err = -EINVAL; 295 goto error; 296 } 297 init_special_inode(inode, inode->i_mode, inode->i_rdev); 298 break; 299 case S_IFREG: 300 if (v9fs_proto_dotl(v9ses)) { 301 inode->i_op = &v9fs_file_inode_operations_dotl; 302 if (v9ses->cache == CACHE_LOOSE || 303 v9ses->cache == CACHE_FSCACHE) 304 inode->i_fop = 305 &v9fs_cached_file_operations_dotl; 306 else if (v9ses->cache == CACHE_MMAP) 307 inode->i_fop = &v9fs_mmap_file_operations_dotl; 308 else 309 inode->i_fop = &v9fs_file_operations_dotl; 310 } else { 311 inode->i_op = &v9fs_file_inode_operations; 312 if (v9ses->cache == CACHE_LOOSE || 313 v9ses->cache == CACHE_FSCACHE) 314 inode->i_fop = 315 &v9fs_cached_file_operations; 316 else if (v9ses->cache == CACHE_MMAP) 317 inode->i_fop = &v9fs_mmap_file_operations; 318 else 319 inode->i_fop = &v9fs_file_operations; 320 } 321 322 break; 323 case S_IFLNK: 324 if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 325 p9_debug(P9_DEBUG_ERROR, 326 "extended modes used with legacy protocol\n"); 327 err = -EINVAL; 328 goto error; 329 } 330 331 if (v9fs_proto_dotl(v9ses)) 332 inode->i_op = &v9fs_symlink_inode_operations_dotl; 333 else 334 inode->i_op = &v9fs_symlink_inode_operations; 335 336 break; 337 case S_IFDIR: 338 inc_nlink(inode); 339 if (v9fs_proto_dotl(v9ses)) 340 inode->i_op = &v9fs_dir_inode_operations_dotl; 341 else if (v9fs_proto_dotu(v9ses)) 342 inode->i_op = &v9fs_dir_inode_operations_dotu; 343 else 344 inode->i_op = &v9fs_dir_inode_operations; 345 346 if (v9fs_proto_dotl(v9ses)) 347 inode->i_fop = &v9fs_dir_operations_dotl; 348 else 349 inode->i_fop = &v9fs_dir_operations; 350 351 break; 352 default: 353 p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", 354 mode, mode & S_IFMT); 355 err = -EINVAL; 356 goto error; 357 } 358 error: 359 return err; 360 361 } 362 363 /** 364 * v9fs_get_inode - helper function to setup an inode 365 * @sb: superblock 366 * @mode: mode to setup inode with 367 * 368 */ 369 370 struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) 371 { 372 int err; 373 struct inode *inode; 374 struct v9fs_session_info *v9ses = sb->s_fs_info; 375 376 p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); 377 378 inode = new_inode(sb); 379 if (!inode) { 380 pr_warn("%s (%d): Problem allocating inode\n", 381 __func__, task_pid_nr(current)); 382 return ERR_PTR(-ENOMEM); 383 } 384 err = v9fs_init_inode(v9ses, inode, mode, rdev); 385 if (err) { 386 iput(inode); 387 return ERR_PTR(err); 388 } 389 return inode; 390 } 391 392 /* 393 static struct v9fs_fid* 394 v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 395 { 396 int err; 397 int nfid; 398 struct v9fs_fid *ret; 399 struct v9fs_fcall *fcall; 400 401 nfid = v9fs_get_idpool(&v9ses->fidpool); 402 if (nfid < 0) { 403 eprintk(KERN_WARNING, "no free fids available\n"); 404 return ERR_PTR(-ENOSPC); 405 } 406 407 err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 408 &fcall); 409 410 if (err < 0) { 411 if (fcall && fcall->id == RWALK) 412 goto clunk_fid; 413 414 PRINT_FCALL_ERROR("walk error", fcall); 415 v9fs_put_idpool(nfid, &v9ses->fidpool); 416 goto error; 417 } 418 419 kfree(fcall); 420 fcall = NULL; 421 ret = v9fs_fid_create(v9ses, nfid); 422 if (!ret) { 423 err = -ENOMEM; 424 goto clunk_fid; 425 } 426 427 err = v9fs_fid_insert(ret, dentry); 428 if (err < 0) { 429 v9fs_fid_destroy(ret); 430 goto clunk_fid; 431 } 432 433 return ret; 434 435 clunk_fid: 436 v9fs_t_clunk(v9ses, nfid); 437 438 error: 439 kfree(fcall); 440 return ERR_PTR(err); 441 } 442 */ 443 444 445 /** 446 * v9fs_clear_inode - release an inode 447 * @inode: inode to release 448 * 449 */ 450 void v9fs_evict_inode(struct inode *inode) 451 { 452 struct v9fs_inode *v9inode = V9FS_I(inode); 453 454 truncate_inode_pages_final(&inode->i_data); 455 clear_inode(inode); 456 filemap_fdatawrite(&inode->i_data); 457 458 v9fs_cache_inode_put_cookie(inode); 459 /* clunk the fid stashed in writeback_fid */ 460 if (v9inode->writeback_fid) { 461 p9_client_clunk(v9inode->writeback_fid); 462 v9inode->writeback_fid = NULL; 463 } 464 } 465 466 static int v9fs_test_inode(struct inode *inode, void *data) 467 { 468 int umode; 469 dev_t rdev; 470 struct v9fs_inode *v9inode = V9FS_I(inode); 471 struct p9_wstat *st = (struct p9_wstat *)data; 472 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 473 474 umode = p9mode2unixmode(v9ses, st, &rdev); 475 /* don't match inode of different type */ 476 if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 477 return 0; 478 479 /* compare qid details */ 480 if (memcmp(&v9inode->qid.version, 481 &st->qid.version, sizeof(v9inode->qid.version))) 482 return 0; 483 484 if (v9inode->qid.type != st->qid.type) 485 return 0; 486 487 if (v9inode->qid.path != st->qid.path) 488 return 0; 489 return 1; 490 } 491 492 static int v9fs_test_new_inode(struct inode *inode, void *data) 493 { 494 return 0; 495 } 496 497 static int v9fs_set_inode(struct inode *inode, void *data) 498 { 499 struct v9fs_inode *v9inode = V9FS_I(inode); 500 struct p9_wstat *st = (struct p9_wstat *)data; 501 502 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 503 return 0; 504 } 505 506 static struct inode *v9fs_qid_iget(struct super_block *sb, 507 struct p9_qid *qid, 508 struct p9_wstat *st, 509 int new) 510 { 511 dev_t rdev; 512 int retval; 513 umode_t umode; 514 unsigned long i_ino; 515 struct inode *inode; 516 struct v9fs_session_info *v9ses = sb->s_fs_info; 517 int (*test)(struct inode *, void *); 518 519 if (new) 520 test = v9fs_test_new_inode; 521 else 522 test = v9fs_test_inode; 523 524 i_ino = v9fs_qid2ino(qid); 525 inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 526 if (!inode) 527 return ERR_PTR(-ENOMEM); 528 if (!(inode->i_state & I_NEW)) 529 return inode; 530 /* 531 * initialize the inode with the stat info 532 * FIXME!! we may need support for stale inodes 533 * later. 534 */ 535 inode->i_ino = i_ino; 536 umode = p9mode2unixmode(v9ses, st, &rdev); 537 retval = v9fs_init_inode(v9ses, inode, umode, rdev); 538 if (retval) 539 goto error; 540 541 v9fs_stat2inode(st, inode, sb); 542 v9fs_cache_inode_get_cookie(inode); 543 unlock_new_inode(inode); 544 return inode; 545 error: 546 iget_failed(inode); 547 return ERR_PTR(retval); 548 549 } 550 551 struct inode * 552 v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 553 struct super_block *sb, int new) 554 { 555 struct p9_wstat *st; 556 struct inode *inode = NULL; 557 558 st = p9_client_stat(fid); 559 if (IS_ERR(st)) 560 return ERR_CAST(st); 561 562 inode = v9fs_qid_iget(sb, &st->qid, st, new); 563 p9stat_free(st); 564 kfree(st); 565 return inode; 566 } 567 568 /** 569 * v9fs_at_to_dotl_flags- convert Linux specific AT flags to 570 * plan 9 AT flag. 571 * @flags: flags to convert 572 */ 573 static int v9fs_at_to_dotl_flags(int flags) 574 { 575 int rflags = 0; 576 if (flags & AT_REMOVEDIR) 577 rflags |= P9_DOTL_AT_REMOVEDIR; 578 return rflags; 579 } 580 581 /** 582 * v9fs_remove - helper function to remove files and directories 583 * @dir: directory inode that is being deleted 584 * @dentry: dentry that is being deleted 585 * @flags: removing a directory 586 * 587 */ 588 589 static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 590 { 591 struct inode *inode; 592 int retval = -EOPNOTSUPP; 593 struct p9_fid *v9fid, *dfid; 594 struct v9fs_session_info *v9ses; 595 596 p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 597 dir, dentry, flags); 598 599 v9ses = v9fs_inode2v9ses(dir); 600 inode = d_inode(dentry); 601 dfid = v9fs_parent_fid(dentry); 602 if (IS_ERR(dfid)) { 603 retval = PTR_ERR(dfid); 604 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 605 return retval; 606 } 607 if (v9fs_proto_dotl(v9ses)) 608 retval = p9_client_unlinkat(dfid, dentry->d_name.name, 609 v9fs_at_to_dotl_flags(flags)); 610 if (retval == -EOPNOTSUPP) { 611 /* Try the one based on path */ 612 v9fid = v9fs_fid_clone(dentry); 613 if (IS_ERR(v9fid)) 614 return PTR_ERR(v9fid); 615 retval = p9_client_remove(v9fid); 616 } 617 if (!retval) { 618 /* 619 * directories on unlink should have zero 620 * link count 621 */ 622 if (flags & AT_REMOVEDIR) { 623 clear_nlink(inode); 624 drop_nlink(dir); 625 } else 626 drop_nlink(inode); 627 628 v9fs_invalidate_inode_attr(inode); 629 v9fs_invalidate_inode_attr(dir); 630 } 631 return retval; 632 } 633 634 /** 635 * v9fs_create - Create a file 636 * @v9ses: session information 637 * @dir: directory that dentry is being created in 638 * @dentry: dentry that is being created 639 * @extension: 9p2000.u extension string to support devices, etc. 640 * @perm: create permissions 641 * @mode: open mode 642 * 643 */ 644 static struct p9_fid * 645 v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 646 struct dentry *dentry, char *extension, u32 perm, u8 mode) 647 { 648 int err; 649 const unsigned char *name; 650 struct p9_fid *dfid, *ofid, *fid; 651 struct inode *inode; 652 653 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 654 655 err = 0; 656 ofid = NULL; 657 fid = NULL; 658 name = dentry->d_name.name; 659 dfid = v9fs_parent_fid(dentry); 660 if (IS_ERR(dfid)) { 661 err = PTR_ERR(dfid); 662 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 663 return ERR_PTR(err); 664 } 665 666 /* clone a fid to use for creation */ 667 ofid = clone_fid(dfid); 668 if (IS_ERR(ofid)) { 669 err = PTR_ERR(ofid); 670 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 671 return ERR_PTR(err); 672 } 673 674 err = p9_client_fcreate(ofid, name, perm, mode, extension); 675 if (err < 0) { 676 p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 677 goto error; 678 } 679 680 if (!(perm & P9_DMLINK)) { 681 /* now walk from the parent so we can get unopened fid */ 682 fid = p9_client_walk(dfid, 1, &name, 1); 683 if (IS_ERR(fid)) { 684 err = PTR_ERR(fid); 685 p9_debug(P9_DEBUG_VFS, 686 "p9_client_walk failed %d\n", err); 687 fid = NULL; 688 goto error; 689 } 690 /* 691 * instantiate inode and assign the unopened fid to the dentry 692 */ 693 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 694 if (IS_ERR(inode)) { 695 err = PTR_ERR(inode); 696 p9_debug(P9_DEBUG_VFS, 697 "inode creation failed %d\n", err); 698 goto error; 699 } 700 v9fs_fid_add(dentry, fid); 701 d_instantiate(dentry, inode); 702 } 703 return ofid; 704 error: 705 if (ofid) 706 p9_client_clunk(ofid); 707 708 if (fid) 709 p9_client_clunk(fid); 710 711 return ERR_PTR(err); 712 } 713 714 /** 715 * v9fs_vfs_create - VFS hook to create a regular file 716 * 717 * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called 718 * for mknod(2). 719 * 720 * @dir: directory inode that is being created 721 * @dentry: dentry that is being deleted 722 * @mode: create permissions 723 * 724 */ 725 726 static int 727 v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 728 bool excl) 729 { 730 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 731 u32 perm = unixmode2p9mode(v9ses, mode); 732 struct p9_fid *fid; 733 734 /* P9_OEXCL? */ 735 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); 736 if (IS_ERR(fid)) 737 return PTR_ERR(fid); 738 739 v9fs_invalidate_inode_attr(dir); 740 p9_client_clunk(fid); 741 742 return 0; 743 } 744 745 /** 746 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 747 * @dir: inode that is being unlinked 748 * @dentry: dentry that is being unlinked 749 * @mode: mode for new directory 750 * 751 */ 752 753 static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 754 { 755 int err; 756 u32 perm; 757 struct p9_fid *fid; 758 struct v9fs_session_info *v9ses; 759 760 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); 761 err = 0; 762 v9ses = v9fs_inode2v9ses(dir); 763 perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 764 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 765 if (IS_ERR(fid)) { 766 err = PTR_ERR(fid); 767 fid = NULL; 768 } else { 769 inc_nlink(dir); 770 v9fs_invalidate_inode_attr(dir); 771 } 772 773 if (fid) 774 p9_client_clunk(fid); 775 776 return err; 777 } 778 779 /** 780 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 781 * @dir: inode that is being walked from 782 * @dentry: dentry that is being walked to? 783 * @flags: lookup flags (unused) 784 * 785 */ 786 787 struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 788 unsigned int flags) 789 { 790 struct dentry *res; 791 struct v9fs_session_info *v9ses; 792 struct p9_fid *dfid, *fid; 793 struct inode *inode; 794 const unsigned char *name; 795 796 p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", 797 dir, dentry, dentry, flags); 798 799 if (dentry->d_name.len > NAME_MAX) 800 return ERR_PTR(-ENAMETOOLONG); 801 802 v9ses = v9fs_inode2v9ses(dir); 803 /* We can walk d_parent because we hold the dir->i_mutex */ 804 dfid = v9fs_parent_fid(dentry); 805 if (IS_ERR(dfid)) 806 return ERR_CAST(dfid); 807 808 name = dentry->d_name.name; 809 fid = p9_client_walk(dfid, 1, &name, 1); 810 if (IS_ERR(fid)) { 811 if (fid == ERR_PTR(-ENOENT)) { 812 d_add(dentry, NULL); 813 return NULL; 814 } 815 return ERR_CAST(fid); 816 } 817 /* 818 * Make sure we don't use a wrong inode due to parallel 819 * unlink. For cached mode create calls request for new 820 * inode. But with cache disabled, lookup should do this. 821 */ 822 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 823 inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 824 else 825 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 826 if (IS_ERR(inode)) { 827 p9_client_clunk(fid); 828 return ERR_CAST(inode); 829 } 830 /* 831 * If we had a rename on the server and a parallel lookup 832 * for the new name, then make sure we instantiate with 833 * the new name. ie look up for a/b, while on server somebody 834 * moved b under k and client parallely did a lookup for 835 * k/b. 836 */ 837 res = d_splice_alias(inode, dentry); 838 if (!res) 839 v9fs_fid_add(dentry, fid); 840 else if (!IS_ERR(res)) 841 v9fs_fid_add(res, fid); 842 else 843 p9_client_clunk(fid); 844 return res; 845 } 846 847 static int 848 v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, 849 struct file *file, unsigned flags, umode_t mode, 850 int *opened) 851 { 852 int err; 853 u32 perm; 854 struct v9fs_inode *v9inode; 855 struct v9fs_session_info *v9ses; 856 struct p9_fid *fid, *inode_fid; 857 struct dentry *res = NULL; 858 859 if (d_in_lookup(dentry)) { 860 res = v9fs_vfs_lookup(dir, dentry, 0); 861 if (IS_ERR(res)) 862 return PTR_ERR(res); 863 864 if (res) 865 dentry = res; 866 } 867 868 /* Only creates */ 869 if (!(flags & O_CREAT) || d_really_is_positive(dentry)) 870 return finish_no_open(file, res); 871 872 err = 0; 873 874 v9ses = v9fs_inode2v9ses(dir); 875 perm = unixmode2p9mode(v9ses, mode); 876 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 877 v9fs_uflags2omode(flags, 878 v9fs_proto_dotu(v9ses))); 879 if (IS_ERR(fid)) { 880 err = PTR_ERR(fid); 881 fid = NULL; 882 goto error; 883 } 884 885 v9fs_invalidate_inode_attr(dir); 886 v9inode = V9FS_I(d_inode(dentry)); 887 mutex_lock(&v9inode->v_mutex); 888 if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && 889 !v9inode->writeback_fid && 890 ((flags & O_ACCMODE) != O_RDONLY)) { 891 /* 892 * clone a fid and add it to writeback_fid 893 * we do it during open time instead of 894 * page dirty time via write_begin/page_mkwrite 895 * because we want write after unlink usecase 896 * to work. 897 */ 898 inode_fid = v9fs_writeback_fid(dentry); 899 if (IS_ERR(inode_fid)) { 900 err = PTR_ERR(inode_fid); 901 mutex_unlock(&v9inode->v_mutex); 902 goto error; 903 } 904 v9inode->writeback_fid = (void *) inode_fid; 905 } 906 mutex_unlock(&v9inode->v_mutex); 907 err = finish_open(file, dentry, generic_file_open, opened); 908 if (err) 909 goto error; 910 911 file->private_data = fid; 912 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 913 v9fs_cache_inode_set_cookie(d_inode(dentry), file); 914 915 *opened |= FILE_CREATED; 916 out: 917 dput(res); 918 return err; 919 920 error: 921 if (fid) 922 p9_client_clunk(fid); 923 goto out; 924 } 925 926 /** 927 * v9fs_vfs_unlink - VFS unlink hook to delete an inode 928 * @i: inode that is being unlinked 929 * @d: dentry that is being unlinked 930 * 931 */ 932 933 int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 934 { 935 return v9fs_remove(i, d, 0); 936 } 937 938 /** 939 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 940 * @i: inode that is being unlinked 941 * @d: dentry that is being unlinked 942 * 943 */ 944 945 int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 946 { 947 return v9fs_remove(i, d, AT_REMOVEDIR); 948 } 949 950 /** 951 * v9fs_vfs_rename - VFS hook to rename an inode 952 * @old_dir: old dir inode 953 * @old_dentry: old dentry 954 * @new_dir: new dir inode 955 * @new_dentry: new dentry 956 * 957 */ 958 959 int 960 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 961 struct inode *new_dir, struct dentry *new_dentry, 962 unsigned int flags) 963 { 964 int retval; 965 struct inode *old_inode; 966 struct inode *new_inode; 967 struct v9fs_session_info *v9ses; 968 struct p9_fid *oldfid; 969 struct p9_fid *olddirfid; 970 struct p9_fid *newdirfid; 971 struct p9_wstat wstat; 972 973 if (flags) 974 return -EINVAL; 975 976 p9_debug(P9_DEBUG_VFS, "\n"); 977 retval = 0; 978 old_inode = d_inode(old_dentry); 979 new_inode = d_inode(new_dentry); 980 v9ses = v9fs_inode2v9ses(old_inode); 981 oldfid = v9fs_fid_lookup(old_dentry); 982 if (IS_ERR(oldfid)) 983 return PTR_ERR(oldfid); 984 985 olddirfid = clone_fid(v9fs_parent_fid(old_dentry)); 986 if (IS_ERR(olddirfid)) { 987 retval = PTR_ERR(olddirfid); 988 goto done; 989 } 990 991 newdirfid = clone_fid(v9fs_parent_fid(new_dentry)); 992 if (IS_ERR(newdirfid)) { 993 retval = PTR_ERR(newdirfid); 994 goto clunk_olddir; 995 } 996 997 down_write(&v9ses->rename_sem); 998 if (v9fs_proto_dotl(v9ses)) { 999 retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 1000 newdirfid, new_dentry->d_name.name); 1001 if (retval == -EOPNOTSUPP) 1002 retval = p9_client_rename(oldfid, newdirfid, 1003 new_dentry->d_name.name); 1004 if (retval != -EOPNOTSUPP) 1005 goto clunk_newdir; 1006 } 1007 if (old_dentry->d_parent != new_dentry->d_parent) { 1008 /* 1009 * 9P .u can only handle file rename in the same directory 1010 */ 1011 1012 p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); 1013 retval = -EXDEV; 1014 goto clunk_newdir; 1015 } 1016 v9fs_blank_wstat(&wstat); 1017 wstat.muid = v9ses->uname; 1018 wstat.name = new_dentry->d_name.name; 1019 retval = p9_client_wstat(oldfid, &wstat); 1020 1021 clunk_newdir: 1022 if (!retval) { 1023 if (new_inode) { 1024 if (S_ISDIR(new_inode->i_mode)) 1025 clear_nlink(new_inode); 1026 else 1027 drop_nlink(new_inode); 1028 } 1029 if (S_ISDIR(old_inode->i_mode)) { 1030 if (!new_inode) 1031 inc_nlink(new_dir); 1032 drop_nlink(old_dir); 1033 } 1034 v9fs_invalidate_inode_attr(old_inode); 1035 v9fs_invalidate_inode_attr(old_dir); 1036 v9fs_invalidate_inode_attr(new_dir); 1037 1038 /* successful rename */ 1039 d_move(old_dentry, new_dentry); 1040 } 1041 up_write(&v9ses->rename_sem); 1042 p9_client_clunk(newdirfid); 1043 1044 clunk_olddir: 1045 p9_client_clunk(olddirfid); 1046 1047 done: 1048 return retval; 1049 } 1050 1051 /** 1052 * v9fs_vfs_getattr - retrieve file metadata 1053 * @path: Object to query 1054 * @stat: metadata structure to populate 1055 * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 1056 * @flags: AT_STATX_xxx setting 1057 * 1058 */ 1059 1060 static int 1061 v9fs_vfs_getattr(const struct path *path, struct kstat *stat, 1062 u32 request_mask, unsigned int flags) 1063 { 1064 struct dentry *dentry = path->dentry; 1065 struct v9fs_session_info *v9ses; 1066 struct p9_fid *fid; 1067 struct p9_wstat *st; 1068 1069 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); 1070 v9ses = v9fs_dentry2v9ses(dentry); 1071 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 1072 generic_fillattr(d_inode(dentry), stat); 1073 return 0; 1074 } 1075 fid = v9fs_fid_lookup(dentry); 1076 if (IS_ERR(fid)) 1077 return PTR_ERR(fid); 1078 1079 st = p9_client_stat(fid); 1080 if (IS_ERR(st)) 1081 return PTR_ERR(st); 1082 1083 v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb); 1084 generic_fillattr(d_inode(dentry), stat); 1085 1086 p9stat_free(st); 1087 kfree(st); 1088 return 0; 1089 } 1090 1091 /** 1092 * v9fs_vfs_setattr - set file metadata 1093 * @dentry: file whose metadata to set 1094 * @iattr: metadata assignment structure 1095 * 1096 */ 1097 1098 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 1099 { 1100 int retval; 1101 struct v9fs_session_info *v9ses; 1102 struct p9_fid *fid; 1103 struct p9_wstat wstat; 1104 1105 p9_debug(P9_DEBUG_VFS, "\n"); 1106 retval = setattr_prepare(dentry, iattr); 1107 if (retval) 1108 return retval; 1109 1110 retval = -EPERM; 1111 v9ses = v9fs_dentry2v9ses(dentry); 1112 fid = v9fs_fid_lookup(dentry); 1113 if(IS_ERR(fid)) 1114 return PTR_ERR(fid); 1115 1116 v9fs_blank_wstat(&wstat); 1117 if (iattr->ia_valid & ATTR_MODE) 1118 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 1119 1120 if (iattr->ia_valid & ATTR_MTIME) 1121 wstat.mtime = iattr->ia_mtime.tv_sec; 1122 1123 if (iattr->ia_valid & ATTR_ATIME) 1124 wstat.atime = iattr->ia_atime.tv_sec; 1125 1126 if (iattr->ia_valid & ATTR_SIZE) 1127 wstat.length = iattr->ia_size; 1128 1129 if (v9fs_proto_dotu(v9ses)) { 1130 if (iattr->ia_valid & ATTR_UID) 1131 wstat.n_uid = iattr->ia_uid; 1132 1133 if (iattr->ia_valid & ATTR_GID) 1134 wstat.n_gid = iattr->ia_gid; 1135 } 1136 1137 /* Write all dirty data */ 1138 if (d_is_reg(dentry)) 1139 filemap_write_and_wait(d_inode(dentry)->i_mapping); 1140 1141 retval = p9_client_wstat(fid, &wstat); 1142 if (retval < 0) 1143 return retval; 1144 1145 if ((iattr->ia_valid & ATTR_SIZE) && 1146 iattr->ia_size != i_size_read(d_inode(dentry))) 1147 truncate_setsize(d_inode(dentry), iattr->ia_size); 1148 1149 v9fs_invalidate_inode_attr(d_inode(dentry)); 1150 1151 setattr_copy(d_inode(dentry), iattr); 1152 mark_inode_dirty(d_inode(dentry)); 1153 return 0; 1154 } 1155 1156 /** 1157 * v9fs_stat2inode - populate an inode structure with mistat info 1158 * @stat: Plan 9 metadata (mistat) structure 1159 * @inode: inode to populate 1160 * @sb: superblock of filesystem 1161 * 1162 */ 1163 1164 void 1165 v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 1166 struct super_block *sb) 1167 { 1168 umode_t mode; 1169 char ext[32]; 1170 char tag_name[14]; 1171 unsigned int i_nlink; 1172 struct v9fs_session_info *v9ses = sb->s_fs_info; 1173 struct v9fs_inode *v9inode = V9FS_I(inode); 1174 1175 set_nlink(inode, 1); 1176 1177 inode->i_atime.tv_sec = stat->atime; 1178 inode->i_mtime.tv_sec = stat->mtime; 1179 inode->i_ctime.tv_sec = stat->mtime; 1180 1181 inode->i_uid = v9ses->dfltuid; 1182 inode->i_gid = v9ses->dfltgid; 1183 1184 if (v9fs_proto_dotu(v9ses)) { 1185 inode->i_uid = stat->n_uid; 1186 inode->i_gid = stat->n_gid; 1187 } 1188 if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 1189 if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 1190 /* 1191 * Hadlink support got added later to 1192 * to the .u extension. So there can be 1193 * server out there that doesn't support 1194 * this even with .u extension. So check 1195 * for non NULL stat->extension 1196 */ 1197 strlcpy(ext, stat->extension, sizeof(ext)); 1198 /* HARDLINKCOUNT %u */ 1199 sscanf(ext, "%13s %u", tag_name, &i_nlink); 1200 if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 1201 set_nlink(inode, i_nlink); 1202 } 1203 } 1204 mode = p9mode2perm(v9ses, stat); 1205 mode |= inode->i_mode & ~S_IALLUGO; 1206 inode->i_mode = mode; 1207 i_size_write(inode, stat->length); 1208 1209 /* not real number of blocks, but 512 byte ones ... */ 1210 inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 1211 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 1212 } 1213 1214 /** 1215 * v9fs_qid2ino - convert qid into inode number 1216 * @qid: qid to hash 1217 * 1218 * BUG: potential for inode number collisions? 1219 */ 1220 1221 ino_t v9fs_qid2ino(struct p9_qid *qid) 1222 { 1223 u64 path = qid->path + 2; 1224 ino_t i = 0; 1225 1226 if (sizeof(ino_t) == sizeof(path)) 1227 memcpy(&i, &path, sizeof(ino_t)); 1228 else 1229 i = (ino_t) (path ^ (path >> 32)); 1230 1231 return i; 1232 } 1233 1234 /** 1235 * v9fs_vfs_get_link - follow a symlink path 1236 * @dentry: dentry for symlink 1237 * @inode: inode for symlink 1238 * @done: delayed call for when we are done with the return value 1239 */ 1240 1241 static const char *v9fs_vfs_get_link(struct dentry *dentry, 1242 struct inode *inode, 1243 struct delayed_call *done) 1244 { 1245 struct v9fs_session_info *v9ses; 1246 struct p9_fid *fid; 1247 struct p9_wstat *st; 1248 char *res; 1249 1250 if (!dentry) 1251 return ERR_PTR(-ECHILD); 1252 1253 v9ses = v9fs_dentry2v9ses(dentry); 1254 fid = v9fs_fid_lookup(dentry); 1255 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); 1256 1257 if (IS_ERR(fid)) 1258 return ERR_CAST(fid); 1259 1260 if (!v9fs_proto_dotu(v9ses)) 1261 return ERR_PTR(-EBADF); 1262 1263 st = p9_client_stat(fid); 1264 if (IS_ERR(st)) 1265 return ERR_CAST(st); 1266 1267 if (!(st->mode & P9_DMSYMLINK)) { 1268 p9stat_free(st); 1269 kfree(st); 1270 return ERR_PTR(-EINVAL); 1271 } 1272 res = st->extension; 1273 st->extension = NULL; 1274 if (strlen(res) >= PATH_MAX) 1275 res[PATH_MAX - 1] = '\0'; 1276 1277 p9stat_free(st); 1278 kfree(st); 1279 set_delayed_call(done, kfree_link, res); 1280 return res; 1281 } 1282 1283 /** 1284 * v9fs_vfs_mkspecial - create a special file 1285 * @dir: inode to create special file in 1286 * @dentry: dentry to create 1287 * @perm: mode to create special file 1288 * @extension: 9p2000.u format extension string representing special file 1289 * 1290 */ 1291 1292 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1293 u32 perm, const char *extension) 1294 { 1295 struct p9_fid *fid; 1296 struct v9fs_session_info *v9ses; 1297 1298 v9ses = v9fs_inode2v9ses(dir); 1299 if (!v9fs_proto_dotu(v9ses)) { 1300 p9_debug(P9_DEBUG_ERROR, "not extended\n"); 1301 return -EPERM; 1302 } 1303 1304 fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1305 P9_OREAD); 1306 if (IS_ERR(fid)) 1307 return PTR_ERR(fid); 1308 1309 v9fs_invalidate_inode_attr(dir); 1310 p9_client_clunk(fid); 1311 return 0; 1312 } 1313 1314 /** 1315 * v9fs_vfs_symlink - helper function to create symlinks 1316 * @dir: directory inode containing symlink 1317 * @dentry: dentry for symlink 1318 * @symname: symlink data 1319 * 1320 * See Also: 9P2000.u RFC for more information 1321 * 1322 */ 1323 1324 static int 1325 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1326 { 1327 p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", 1328 dir->i_ino, dentry, symname); 1329 1330 return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); 1331 } 1332 1333 #define U32_MAX_DIGITS 10 1334 1335 /** 1336 * v9fs_vfs_link - create a hardlink 1337 * @old_dentry: dentry for file to link to 1338 * @dir: inode destination for new link 1339 * @dentry: dentry for link 1340 * 1341 */ 1342 1343 static int 1344 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 1345 struct dentry *dentry) 1346 { 1347 int retval; 1348 char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ 1349 struct p9_fid *oldfid; 1350 1351 p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", 1352 dir->i_ino, dentry, old_dentry); 1353 1354 oldfid = v9fs_fid_clone(old_dentry); 1355 if (IS_ERR(oldfid)) 1356 return PTR_ERR(oldfid); 1357 1358 sprintf(name, "%d\n", oldfid->fid); 1359 retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1360 if (!retval) { 1361 v9fs_refresh_inode(oldfid, d_inode(old_dentry)); 1362 v9fs_invalidate_inode_attr(dir); 1363 } 1364 p9_client_clunk(oldfid); 1365 return retval; 1366 } 1367 1368 /** 1369 * v9fs_vfs_mknod - create a special file 1370 * @dir: inode destination for new link 1371 * @dentry: dentry for file 1372 * @mode: mode for creation 1373 * @rdev: device associated with special file 1374 * 1375 */ 1376 1377 static int 1378 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) 1379 { 1380 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); 1381 int retval; 1382 char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; 1383 u32 perm; 1384 1385 p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n", 1386 dir->i_ino, dentry, mode, 1387 MAJOR(rdev), MINOR(rdev)); 1388 1389 /* build extension */ 1390 if (S_ISBLK(mode)) 1391 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 1392 else if (S_ISCHR(mode)) 1393 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1394 else 1395 *name = 0; 1396 1397 perm = unixmode2p9mode(v9ses, mode); 1398 retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); 1399 1400 return retval; 1401 } 1402 1403 int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1404 { 1405 int umode; 1406 dev_t rdev; 1407 loff_t i_size; 1408 struct p9_wstat *st; 1409 struct v9fs_session_info *v9ses; 1410 1411 v9ses = v9fs_inode2v9ses(inode); 1412 st = p9_client_stat(fid); 1413 if (IS_ERR(st)) 1414 return PTR_ERR(st); 1415 /* 1416 * Don't update inode if the file type is different 1417 */ 1418 umode = p9mode2unixmode(v9ses, st, &rdev); 1419 if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 1420 goto out; 1421 1422 spin_lock(&inode->i_lock); 1423 /* 1424 * We don't want to refresh inode->i_size, 1425 * because we may have cached data 1426 */ 1427 i_size = inode->i_size; 1428 v9fs_stat2inode(st, inode, inode->i_sb); 1429 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 1430 inode->i_size = i_size; 1431 spin_unlock(&inode->i_lock); 1432 out: 1433 p9stat_free(st); 1434 kfree(st); 1435 return 0; 1436 } 1437 1438 static const struct inode_operations v9fs_dir_inode_operations_dotu = { 1439 .create = v9fs_vfs_create, 1440 .lookup = v9fs_vfs_lookup, 1441 .atomic_open = v9fs_vfs_atomic_open, 1442 .symlink = v9fs_vfs_symlink, 1443 .link = v9fs_vfs_link, 1444 .unlink = v9fs_vfs_unlink, 1445 .mkdir = v9fs_vfs_mkdir, 1446 .rmdir = v9fs_vfs_rmdir, 1447 .mknod = v9fs_vfs_mknod, 1448 .rename = v9fs_vfs_rename, 1449 .getattr = v9fs_vfs_getattr, 1450 .setattr = v9fs_vfs_setattr, 1451 }; 1452 1453 static const struct inode_operations v9fs_dir_inode_operations = { 1454 .create = v9fs_vfs_create, 1455 .lookup = v9fs_vfs_lookup, 1456 .atomic_open = v9fs_vfs_atomic_open, 1457 .unlink = v9fs_vfs_unlink, 1458 .mkdir = v9fs_vfs_mkdir, 1459 .rmdir = v9fs_vfs_rmdir, 1460 .mknod = v9fs_vfs_mknod, 1461 .rename = v9fs_vfs_rename, 1462 .getattr = v9fs_vfs_getattr, 1463 .setattr = v9fs_vfs_setattr, 1464 }; 1465 1466 static const struct inode_operations v9fs_file_inode_operations = { 1467 .getattr = v9fs_vfs_getattr, 1468 .setattr = v9fs_vfs_setattr, 1469 }; 1470 1471 static const struct inode_operations v9fs_symlink_inode_operations = { 1472 .get_link = v9fs_vfs_get_link, 1473 .getattr = v9fs_vfs_getattr, 1474 .setattr = v9fs_vfs_setattr, 1475 }; 1476 1477