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 #include <linux/module.h> 27 #include <linux/errno.h> 28 #include <linux/fs.h> 29 #include <linux/file.h> 30 #include <linux/pagemap.h> 31 #include <linux/stat.h> 32 #include <linux/string.h> 33 #include <linux/inet.h> 34 #include <linux/namei.h> 35 #include <linux/idr.h> 36 #include <linux/sched.h> 37 #include <linux/slab.h> 38 #include <linux/xattr.h> 39 #include <linux/posix_acl.h> 40 #include <net/9p/9p.h> 41 #include <net/9p/client.h> 42 43 #include "v9fs.h" 44 #include "v9fs_vfs.h" 45 #include "fid.h" 46 #include "cache.h" 47 #include "xattr.h" 48 #include "acl.h" 49 50 static const struct inode_operations v9fs_dir_inode_operations; 51 static const struct inode_operations v9fs_dir_inode_operations_dotu; 52 static const struct inode_operations v9fs_file_inode_operations; 53 static const struct inode_operations v9fs_symlink_inode_operations; 54 55 /** 56 * unixmode2p9mode - convert unix mode bits to plan 9 57 * @v9ses: v9fs session information 58 * @mode: mode to convert 59 * 60 */ 61 62 static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) 63 { 64 int res; 65 res = mode & 0777; 66 if (S_ISDIR(mode)) 67 res |= P9_DMDIR; 68 if (v9fs_proto_dotu(v9ses)) { 69 if (S_ISLNK(mode)) 70 res |= P9_DMSYMLINK; 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 if ((mode & P9_DMLINK)) 89 res |= P9_DMLINK; 90 } 91 92 return res; 93 } 94 95 /** 96 * p9mode2unixmode- convert plan9 mode bits to unix mode bits 97 * @v9ses: v9fs session information 98 * @mode: mode to convert 99 * 100 */ 101 102 static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) 103 { 104 int res; 105 106 res = mode & 0777; 107 108 if ((mode & P9_DMDIR) == P9_DMDIR) 109 res |= S_IFDIR; 110 else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) 111 res |= S_IFLNK; 112 else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) 113 && (v9ses->nodev == 0)) 114 res |= S_IFSOCK; 115 else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) 116 && (v9ses->nodev == 0)) 117 res |= S_IFIFO; 118 else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) 119 && (v9ses->nodev == 0)) 120 res |= S_IFBLK; 121 else 122 res |= S_IFREG; 123 124 if (v9fs_proto_dotu(v9ses)) { 125 if ((mode & P9_DMSETUID) == P9_DMSETUID) 126 res |= S_ISUID; 127 128 if ((mode & P9_DMSETGID) == P9_DMSETGID) 129 res |= S_ISGID; 130 131 if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 132 res |= S_ISVTX; 133 } 134 135 return res; 136 } 137 138 /** 139 * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 140 * @uflags: flags to convert 141 * @extended: if .u extensions are active 142 */ 143 144 int v9fs_uflags2omode(int uflags, int extended) 145 { 146 int ret; 147 148 ret = 0; 149 switch (uflags&3) { 150 default: 151 case O_RDONLY: 152 ret = P9_OREAD; 153 break; 154 155 case O_WRONLY: 156 ret = P9_OWRITE; 157 break; 158 159 case O_RDWR: 160 ret = P9_ORDWR; 161 break; 162 } 163 164 if (uflags & O_TRUNC) 165 ret |= P9_OTRUNC; 166 167 if (extended) { 168 if (uflags & O_EXCL) 169 ret |= P9_OEXCL; 170 171 if (uflags & O_APPEND) 172 ret |= P9_OAPPEND; 173 } 174 175 return ret; 176 } 177 178 /** 179 * v9fs_blank_wstat - helper function to setup a 9P stat structure 180 * @wstat: structure to initialize 181 * 182 */ 183 184 void 185 v9fs_blank_wstat(struct p9_wstat *wstat) 186 { 187 wstat->type = ~0; 188 wstat->dev = ~0; 189 wstat->qid.type = ~0; 190 wstat->qid.version = ~0; 191 *((long long *)&wstat->qid.path) = ~0; 192 wstat->mode = ~0; 193 wstat->atime = ~0; 194 wstat->mtime = ~0; 195 wstat->length = ~0; 196 wstat->name = NULL; 197 wstat->uid = NULL; 198 wstat->gid = NULL; 199 wstat->muid = NULL; 200 wstat->n_uid = ~0; 201 wstat->n_gid = ~0; 202 wstat->n_muid = ~0; 203 wstat->extension = NULL; 204 } 205 206 /** 207 * v9fs_alloc_inode - helper function to allocate an inode 208 * 209 */ 210 struct inode *v9fs_alloc_inode(struct super_block *sb) 211 { 212 struct v9fs_inode *v9inode; 213 v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache, 214 GFP_KERNEL); 215 if (!v9inode) 216 return NULL; 217 #ifdef CONFIG_9P_FSCACHE 218 v9inode->fscache = NULL; 219 spin_lock_init(&v9inode->fscache_lock); 220 #endif 221 v9inode->writeback_fid = NULL; 222 v9inode->cache_validity = 0; 223 mutex_init(&v9inode->v_mutex); 224 return &v9inode->vfs_inode; 225 } 226 227 /** 228 * v9fs_destroy_inode - destroy an inode 229 * 230 */ 231 232 static void v9fs_i_callback(struct rcu_head *head) 233 { 234 struct inode *inode = container_of(head, struct inode, i_rcu); 235 INIT_LIST_HEAD(&inode->i_dentry); 236 kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); 237 } 238 239 void v9fs_destroy_inode(struct inode *inode) 240 { 241 call_rcu(&inode->i_rcu, v9fs_i_callback); 242 } 243 244 int v9fs_init_inode(struct v9fs_session_info *v9ses, 245 struct inode *inode, int mode) 246 { 247 int err = 0; 248 249 inode_init_owner(inode, NULL, mode); 250 inode->i_blocks = 0; 251 inode->i_rdev = 0; 252 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 253 inode->i_mapping->a_ops = &v9fs_addr_operations; 254 255 switch (mode & S_IFMT) { 256 case S_IFIFO: 257 case S_IFBLK: 258 case S_IFCHR: 259 case S_IFSOCK: 260 if (v9fs_proto_dotl(v9ses)) { 261 inode->i_op = &v9fs_file_inode_operations_dotl; 262 inode->i_fop = &v9fs_file_operations_dotl; 263 } else if (v9fs_proto_dotu(v9ses)) { 264 inode->i_op = &v9fs_file_inode_operations; 265 inode->i_fop = &v9fs_file_operations; 266 } else { 267 P9_DPRINTK(P9_DEBUG_ERROR, 268 "special files without extended mode\n"); 269 err = -EINVAL; 270 goto error; 271 } 272 init_special_inode(inode, inode->i_mode, inode->i_rdev); 273 break; 274 case S_IFREG: 275 if (v9fs_proto_dotl(v9ses)) { 276 inode->i_op = &v9fs_file_inode_operations_dotl; 277 if (v9ses->cache) 278 inode->i_fop = 279 &v9fs_cached_file_operations_dotl; 280 else 281 inode->i_fop = &v9fs_file_operations_dotl; 282 } else { 283 inode->i_op = &v9fs_file_inode_operations; 284 if (v9ses->cache) 285 inode->i_fop = &v9fs_cached_file_operations; 286 else 287 inode->i_fop = &v9fs_file_operations; 288 } 289 290 break; 291 case S_IFLNK: 292 if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { 293 P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with " 294 "legacy protocol.\n"); 295 err = -EINVAL; 296 goto error; 297 } 298 299 if (v9fs_proto_dotl(v9ses)) 300 inode->i_op = &v9fs_symlink_inode_operations_dotl; 301 else 302 inode->i_op = &v9fs_symlink_inode_operations; 303 304 break; 305 case S_IFDIR: 306 inc_nlink(inode); 307 if (v9fs_proto_dotl(v9ses)) 308 inode->i_op = &v9fs_dir_inode_operations_dotl; 309 else if (v9fs_proto_dotu(v9ses)) 310 inode->i_op = &v9fs_dir_inode_operations_dotu; 311 else 312 inode->i_op = &v9fs_dir_inode_operations; 313 314 if (v9fs_proto_dotl(v9ses)) 315 inode->i_fop = &v9fs_dir_operations_dotl; 316 else 317 inode->i_fop = &v9fs_dir_operations; 318 319 break; 320 default: 321 P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 322 mode, mode & S_IFMT); 323 err = -EINVAL; 324 goto error; 325 } 326 error: 327 return err; 328 329 } 330 331 /** 332 * v9fs_get_inode - helper function to setup an inode 333 * @sb: superblock 334 * @mode: mode to setup inode with 335 * 336 */ 337 338 struct inode *v9fs_get_inode(struct super_block *sb, int mode) 339 { 340 int err; 341 struct inode *inode; 342 struct v9fs_session_info *v9ses = sb->s_fs_info; 343 344 P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 345 346 inode = new_inode(sb); 347 if (!inode) { 348 P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 349 return ERR_PTR(-ENOMEM); 350 } 351 err = v9fs_init_inode(v9ses, inode, mode); 352 if (err) { 353 iput(inode); 354 return ERR_PTR(err); 355 } 356 return inode; 357 } 358 359 /* 360 static struct v9fs_fid* 361 v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 362 { 363 int err; 364 int nfid; 365 struct v9fs_fid *ret; 366 struct v9fs_fcall *fcall; 367 368 nfid = v9fs_get_idpool(&v9ses->fidpool); 369 if (nfid < 0) { 370 eprintk(KERN_WARNING, "no free fids available\n"); 371 return ERR_PTR(-ENOSPC); 372 } 373 374 err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 375 &fcall); 376 377 if (err < 0) { 378 if (fcall && fcall->id == RWALK) 379 goto clunk_fid; 380 381 PRINT_FCALL_ERROR("walk error", fcall); 382 v9fs_put_idpool(nfid, &v9ses->fidpool); 383 goto error; 384 } 385 386 kfree(fcall); 387 fcall = NULL; 388 ret = v9fs_fid_create(v9ses, nfid); 389 if (!ret) { 390 err = -ENOMEM; 391 goto clunk_fid; 392 } 393 394 err = v9fs_fid_insert(ret, dentry); 395 if (err < 0) { 396 v9fs_fid_destroy(ret); 397 goto clunk_fid; 398 } 399 400 return ret; 401 402 clunk_fid: 403 v9fs_t_clunk(v9ses, nfid); 404 405 error: 406 kfree(fcall); 407 return ERR_PTR(err); 408 } 409 */ 410 411 412 /** 413 * v9fs_clear_inode - release an inode 414 * @inode: inode to release 415 * 416 */ 417 void v9fs_evict_inode(struct inode *inode) 418 { 419 struct v9fs_inode *v9inode = V9FS_I(inode); 420 421 truncate_inode_pages(inode->i_mapping, 0); 422 end_writeback(inode); 423 filemap_fdatawrite(inode->i_mapping); 424 425 #ifdef CONFIG_9P_FSCACHE 426 v9fs_cache_inode_put_cookie(inode); 427 #endif 428 /* clunk the fid stashed in writeback_fid */ 429 if (v9inode->writeback_fid) { 430 p9_client_clunk(v9inode->writeback_fid); 431 v9inode->writeback_fid = NULL; 432 } 433 } 434 435 static int v9fs_test_inode(struct inode *inode, void *data) 436 { 437 int umode; 438 struct v9fs_inode *v9inode = V9FS_I(inode); 439 struct p9_wstat *st = (struct p9_wstat *)data; 440 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); 441 442 umode = p9mode2unixmode(v9ses, st->mode); 443 /* don't match inode of different type */ 444 if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) 445 return 0; 446 447 /* compare qid details */ 448 if (memcmp(&v9inode->qid.version, 449 &st->qid.version, sizeof(v9inode->qid.version))) 450 return 0; 451 452 if (v9inode->qid.type != st->qid.type) 453 return 0; 454 return 1; 455 } 456 457 static int v9fs_test_new_inode(struct inode *inode, void *data) 458 { 459 return 0; 460 } 461 462 static int v9fs_set_inode(struct inode *inode, void *data) 463 { 464 struct v9fs_inode *v9inode = V9FS_I(inode); 465 struct p9_wstat *st = (struct p9_wstat *)data; 466 467 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); 468 return 0; 469 } 470 471 static struct inode *v9fs_qid_iget(struct super_block *sb, 472 struct p9_qid *qid, 473 struct p9_wstat *st, 474 int new) 475 { 476 int retval, umode; 477 unsigned long i_ino; 478 struct inode *inode; 479 struct v9fs_session_info *v9ses = sb->s_fs_info; 480 int (*test)(struct inode *, void *); 481 482 if (new) 483 test = v9fs_test_new_inode; 484 else 485 test = v9fs_test_inode; 486 487 i_ino = v9fs_qid2ino(qid); 488 inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); 489 if (!inode) 490 return ERR_PTR(-ENOMEM); 491 if (!(inode->i_state & I_NEW)) 492 return inode; 493 /* 494 * initialize the inode with the stat info 495 * FIXME!! we may need support for stale inodes 496 * later. 497 */ 498 inode->i_ino = i_ino; 499 umode = p9mode2unixmode(v9ses, st->mode); 500 retval = v9fs_init_inode(v9ses, inode, umode); 501 if (retval) 502 goto error; 503 504 v9fs_stat2inode(st, inode, sb); 505 #ifdef CONFIG_9P_FSCACHE 506 v9fs_cache_inode_get_cookie(inode); 507 #endif 508 unlock_new_inode(inode); 509 return inode; 510 error: 511 unlock_new_inode(inode); 512 iput(inode); 513 return ERR_PTR(retval); 514 515 } 516 517 struct inode * 518 v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 519 struct super_block *sb, int new) 520 { 521 struct p9_wstat *st; 522 struct inode *inode = NULL; 523 524 st = p9_client_stat(fid); 525 if (IS_ERR(st)) 526 return ERR_CAST(st); 527 528 inode = v9fs_qid_iget(sb, &st->qid, st, new); 529 p9stat_free(st); 530 kfree(st); 531 return inode; 532 } 533 534 /** 535 * v9fs_remove - helper function to remove files and directories 536 * @dir: directory inode that is being deleted 537 * @dentry: dentry that is being deleted 538 * @rmdir: removing a directory 539 * 540 */ 541 542 static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) 543 { 544 struct inode *inode; 545 int retval = -EOPNOTSUPP; 546 struct p9_fid *v9fid, *dfid; 547 struct v9fs_session_info *v9ses; 548 549 P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", 550 dir, dentry, flags); 551 552 v9ses = v9fs_inode2v9ses(dir); 553 inode = dentry->d_inode; 554 dfid = v9fs_fid_lookup(dentry->d_parent); 555 if (IS_ERR(dfid)) { 556 retval = PTR_ERR(dfid); 557 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); 558 return retval; 559 } 560 if (v9fs_proto_dotl(v9ses)) 561 retval = p9_client_unlinkat(dfid, dentry->d_name.name, flags); 562 if (retval == -EOPNOTSUPP) { 563 /* Try the one based on path */ 564 v9fid = v9fs_fid_clone(dentry); 565 if (IS_ERR(v9fid)) 566 return PTR_ERR(v9fid); 567 retval = p9_client_remove(v9fid); 568 } 569 if (!retval) { 570 /* 571 * directories on unlink should have zero 572 * link count 573 */ 574 if (flags & AT_REMOVEDIR) { 575 clear_nlink(inode); 576 drop_nlink(dir); 577 } else 578 drop_nlink(inode); 579 580 v9fs_invalidate_inode_attr(inode); 581 v9fs_invalidate_inode_attr(dir); 582 } 583 return retval; 584 } 585 586 /** 587 * v9fs_create - Create a file 588 * @v9ses: session information 589 * @dir: directory that dentry is being created in 590 * @dentry: dentry that is being created 591 * @extension: 9p2000.u extension string to support devices, etc. 592 * @perm: create permissions 593 * @mode: open mode 594 * 595 */ 596 static struct p9_fid * 597 v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 598 struct dentry *dentry, char *extension, u32 perm, u8 mode) 599 { 600 int err; 601 char *name; 602 struct p9_fid *dfid, *ofid, *fid; 603 struct inode *inode; 604 605 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 606 607 err = 0; 608 ofid = NULL; 609 fid = NULL; 610 name = (char *) dentry->d_name.name; 611 dfid = v9fs_fid_lookup(dentry->d_parent); 612 if (IS_ERR(dfid)) { 613 err = PTR_ERR(dfid); 614 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); 615 return ERR_PTR(err); 616 } 617 618 /* clone a fid to use for creation */ 619 ofid = p9_client_walk(dfid, 0, NULL, 1); 620 if (IS_ERR(ofid)) { 621 err = PTR_ERR(ofid); 622 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 623 return ERR_PTR(err); 624 } 625 626 err = p9_client_fcreate(ofid, name, perm, mode, extension); 627 if (err < 0) { 628 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 629 goto error; 630 } 631 632 /* now walk from the parent so we can get unopened fid */ 633 fid = p9_client_walk(dfid, 1, &name, 1); 634 if (IS_ERR(fid)) { 635 err = PTR_ERR(fid); 636 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 637 fid = NULL; 638 goto error; 639 } 640 641 /* instantiate inode and assign the unopened fid to the dentry */ 642 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); 643 if (IS_ERR(inode)) { 644 err = PTR_ERR(inode); 645 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 646 goto error; 647 } 648 d_instantiate(dentry, inode); 649 err = v9fs_fid_add(dentry, fid); 650 if (err < 0) 651 goto error; 652 653 return ofid; 654 655 error: 656 if (ofid) 657 p9_client_clunk(ofid); 658 659 if (fid) 660 p9_client_clunk(fid); 661 662 return ERR_PTR(err); 663 } 664 665 /** 666 * v9fs_vfs_create - VFS hook to create files 667 * @dir: directory inode that is being created 668 * @dentry: dentry that is being deleted 669 * @mode: create permissions 670 * @nd: path information 671 * 672 */ 673 674 static int 675 v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 676 struct nameidata *nd) 677 { 678 int err; 679 u32 perm; 680 int flags; 681 struct file *filp; 682 struct v9fs_inode *v9inode; 683 struct v9fs_session_info *v9ses; 684 struct p9_fid *fid, *inode_fid; 685 686 err = 0; 687 fid = NULL; 688 v9ses = v9fs_inode2v9ses(dir); 689 perm = unixmode2p9mode(v9ses, mode); 690 if (nd) 691 flags = nd->intent.open.flags; 692 else 693 flags = O_RDWR; 694 695 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 696 v9fs_uflags2omode(flags, 697 v9fs_proto_dotu(v9ses))); 698 if (IS_ERR(fid)) { 699 err = PTR_ERR(fid); 700 fid = NULL; 701 goto error; 702 } 703 704 v9fs_invalidate_inode_attr(dir); 705 /* if we are opening a file, assign the open fid to the file */ 706 if (nd) { 707 v9inode = V9FS_I(dentry->d_inode); 708 mutex_lock(&v9inode->v_mutex); 709 if (v9ses->cache && !v9inode->writeback_fid && 710 ((flags & O_ACCMODE) != O_RDONLY)) { 711 /* 712 * clone a fid and add it to writeback_fid 713 * we do it during open time instead of 714 * page dirty time via write_begin/page_mkwrite 715 * because we want write after unlink usecase 716 * to work. 717 */ 718 inode_fid = v9fs_writeback_fid(dentry); 719 if (IS_ERR(inode_fid)) { 720 err = PTR_ERR(inode_fid); 721 mutex_unlock(&v9inode->v_mutex); 722 goto error; 723 } 724 v9inode->writeback_fid = (void *) inode_fid; 725 } 726 mutex_unlock(&v9inode->v_mutex); 727 filp = lookup_instantiate_filp(nd, dentry, generic_file_open); 728 if (IS_ERR(filp)) { 729 err = PTR_ERR(filp); 730 goto error; 731 } 732 733 filp->private_data = fid; 734 #ifdef CONFIG_9P_FSCACHE 735 if (v9ses->cache) 736 v9fs_cache_inode_set_cookie(dentry->d_inode, filp); 737 #endif 738 } else 739 p9_client_clunk(fid); 740 741 return 0; 742 743 error: 744 if (fid) 745 p9_client_clunk(fid); 746 747 return err; 748 } 749 750 /** 751 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 752 * @dir: inode that is being unlinked 753 * @dentry: dentry that is being unlinked 754 * @mode: mode for new directory 755 * 756 */ 757 758 static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 759 { 760 int err; 761 u32 perm; 762 struct p9_fid *fid; 763 struct v9fs_session_info *v9ses; 764 765 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 766 err = 0; 767 v9ses = v9fs_inode2v9ses(dir); 768 perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 769 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 770 if (IS_ERR(fid)) { 771 err = PTR_ERR(fid); 772 fid = NULL; 773 } else { 774 inc_nlink(dir); 775 v9fs_invalidate_inode_attr(dir); 776 } 777 778 if (fid) 779 p9_client_clunk(fid); 780 781 return err; 782 } 783 784 /** 785 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 786 * @dir: inode that is being walked from 787 * @dentry: dentry that is being walked to? 788 * @nameidata: path data 789 * 790 */ 791 792 struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 793 struct nameidata *nameidata) 794 { 795 struct super_block *sb; 796 struct v9fs_session_info *v9ses; 797 struct p9_fid *dfid, *fid; 798 struct inode *inode; 799 char *name; 800 int result = 0; 801 802 P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 803 dir, dentry->d_name.name, dentry, nameidata); 804 805 if (dentry->d_name.len > NAME_MAX) 806 return ERR_PTR(-ENAMETOOLONG); 807 808 sb = dir->i_sb; 809 v9ses = v9fs_inode2v9ses(dir); 810 /* We can walk d_parent because we hold the dir->i_mutex */ 811 dfid = v9fs_fid_lookup(dentry->d_parent); 812 if (IS_ERR(dfid)) 813 return ERR_CAST(dfid); 814 815 name = (char *) dentry->d_name.name; 816 fid = p9_client_walk(dfid, 1, &name, 1); 817 if (IS_ERR(fid)) { 818 result = PTR_ERR(fid); 819 if (result == -ENOENT) { 820 inode = NULL; 821 goto inst_out; 822 } 823 824 return ERR_PTR(result); 825 } 826 827 inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); 828 if (IS_ERR(inode)) { 829 result = PTR_ERR(inode); 830 inode = NULL; 831 goto error; 832 } 833 834 result = v9fs_fid_add(dentry, fid); 835 if (result < 0) 836 goto error_iput; 837 838 inst_out: 839 d_add(dentry, inode); 840 return NULL; 841 842 error_iput: 843 iput(inode); 844 error: 845 p9_client_clunk(fid); 846 847 return ERR_PTR(result); 848 } 849 850 /** 851 * v9fs_vfs_unlink - VFS unlink hook to delete an inode 852 * @i: inode that is being unlinked 853 * @d: dentry that is being unlinked 854 * 855 */ 856 857 int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 858 { 859 return v9fs_remove(i, d, 0); 860 } 861 862 /** 863 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 864 * @i: inode that is being unlinked 865 * @d: dentry that is being unlinked 866 * 867 */ 868 869 int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 870 { 871 return v9fs_remove(i, d, AT_REMOVEDIR); 872 } 873 874 /** 875 * v9fs_vfs_rename - VFS hook to rename an inode 876 * @old_dir: old dir inode 877 * @old_dentry: old dentry 878 * @new_dir: new dir inode 879 * @new_dentry: new dentry 880 * 881 */ 882 883 int 884 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 885 struct inode *new_dir, struct dentry *new_dentry) 886 { 887 int retval; 888 struct inode *old_inode; 889 struct inode *new_inode; 890 struct v9fs_session_info *v9ses; 891 struct p9_fid *oldfid; 892 struct p9_fid *olddirfid; 893 struct p9_fid *newdirfid; 894 struct p9_wstat wstat; 895 896 P9_DPRINTK(P9_DEBUG_VFS, "\n"); 897 retval = 0; 898 old_inode = old_dentry->d_inode; 899 new_inode = new_dentry->d_inode; 900 v9ses = v9fs_inode2v9ses(old_inode); 901 oldfid = v9fs_fid_lookup(old_dentry); 902 if (IS_ERR(oldfid)) 903 return PTR_ERR(oldfid); 904 905 olddirfid = v9fs_fid_clone(old_dentry->d_parent); 906 if (IS_ERR(olddirfid)) { 907 retval = PTR_ERR(olddirfid); 908 goto done; 909 } 910 911 newdirfid = v9fs_fid_clone(new_dentry->d_parent); 912 if (IS_ERR(newdirfid)) { 913 retval = PTR_ERR(newdirfid); 914 goto clunk_olddir; 915 } 916 917 down_write(&v9ses->rename_sem); 918 if (v9fs_proto_dotl(v9ses)) { 919 retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, 920 newdirfid, new_dentry->d_name.name); 921 if (retval == -EOPNOTSUPP) 922 retval = p9_client_rename(oldfid, newdirfid, 923 new_dentry->d_name.name); 924 if (retval != -EOPNOTSUPP) 925 goto clunk_newdir; 926 } 927 if (old_dentry->d_parent != new_dentry->d_parent) { 928 /* 929 * 9P .u can only handle file rename in the same directory 930 */ 931 932 P9_DPRINTK(P9_DEBUG_ERROR, 933 "old dir and new dir are different\n"); 934 retval = -EXDEV; 935 goto clunk_newdir; 936 } 937 v9fs_blank_wstat(&wstat); 938 wstat.muid = v9ses->uname; 939 wstat.name = (char *) new_dentry->d_name.name; 940 retval = p9_client_wstat(oldfid, &wstat); 941 942 clunk_newdir: 943 if (!retval) { 944 if (new_inode) { 945 if (S_ISDIR(new_inode->i_mode)) 946 clear_nlink(new_inode); 947 else 948 drop_nlink(new_inode); 949 } 950 if (S_ISDIR(old_inode->i_mode)) { 951 if (!new_inode) 952 inc_nlink(new_dir); 953 drop_nlink(old_dir); 954 } 955 v9fs_invalidate_inode_attr(old_inode); 956 v9fs_invalidate_inode_attr(old_dir); 957 v9fs_invalidate_inode_attr(new_dir); 958 959 /* successful rename */ 960 d_move(old_dentry, new_dentry); 961 } 962 up_write(&v9ses->rename_sem); 963 p9_client_clunk(newdirfid); 964 965 clunk_olddir: 966 p9_client_clunk(olddirfid); 967 968 done: 969 return retval; 970 } 971 972 /** 973 * v9fs_vfs_getattr - retrieve file metadata 974 * @mnt: mount information 975 * @dentry: file to get attributes on 976 * @stat: metadata structure to populate 977 * 978 */ 979 980 static int 981 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 982 struct kstat *stat) 983 { 984 int err; 985 struct v9fs_session_info *v9ses; 986 struct p9_fid *fid; 987 struct p9_wstat *st; 988 989 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 990 err = -EPERM; 991 v9ses = v9fs_dentry2v9ses(dentry); 992 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { 993 generic_fillattr(dentry->d_inode, stat); 994 return 0; 995 } 996 fid = v9fs_fid_lookup(dentry); 997 if (IS_ERR(fid)) 998 return PTR_ERR(fid); 999 1000 st = p9_client_stat(fid); 1001 if (IS_ERR(st)) 1002 return PTR_ERR(st); 1003 1004 v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 1005 generic_fillattr(dentry->d_inode, stat); 1006 1007 p9stat_free(st); 1008 kfree(st); 1009 return 0; 1010 } 1011 1012 /** 1013 * v9fs_vfs_setattr - set file metadata 1014 * @dentry: file whose metadata to set 1015 * @iattr: metadata assignment structure 1016 * 1017 */ 1018 1019 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 1020 { 1021 int retval; 1022 struct v9fs_session_info *v9ses; 1023 struct p9_fid *fid; 1024 struct p9_wstat wstat; 1025 1026 P9_DPRINTK(P9_DEBUG_VFS, "\n"); 1027 retval = inode_change_ok(dentry->d_inode, iattr); 1028 if (retval) 1029 return retval; 1030 1031 retval = -EPERM; 1032 v9ses = v9fs_dentry2v9ses(dentry); 1033 fid = v9fs_fid_lookup(dentry); 1034 if(IS_ERR(fid)) 1035 return PTR_ERR(fid); 1036 1037 v9fs_blank_wstat(&wstat); 1038 if (iattr->ia_valid & ATTR_MODE) 1039 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 1040 1041 if (iattr->ia_valid & ATTR_MTIME) 1042 wstat.mtime = iattr->ia_mtime.tv_sec; 1043 1044 if (iattr->ia_valid & ATTR_ATIME) 1045 wstat.atime = iattr->ia_atime.tv_sec; 1046 1047 if (iattr->ia_valid & ATTR_SIZE) 1048 wstat.length = iattr->ia_size; 1049 1050 if (v9fs_proto_dotu(v9ses)) { 1051 if (iattr->ia_valid & ATTR_UID) 1052 wstat.n_uid = iattr->ia_uid; 1053 1054 if (iattr->ia_valid & ATTR_GID) 1055 wstat.n_gid = iattr->ia_gid; 1056 } 1057 1058 /* Write all dirty data */ 1059 if (S_ISREG(dentry->d_inode->i_mode)) 1060 filemap_write_and_wait(dentry->d_inode->i_mapping); 1061 1062 retval = p9_client_wstat(fid, &wstat); 1063 if (retval < 0) 1064 return retval; 1065 1066 if ((iattr->ia_valid & ATTR_SIZE) && 1067 iattr->ia_size != i_size_read(dentry->d_inode)) 1068 truncate_setsize(dentry->d_inode, iattr->ia_size); 1069 1070 v9fs_invalidate_inode_attr(dentry->d_inode); 1071 1072 setattr_copy(dentry->d_inode, iattr); 1073 mark_inode_dirty(dentry->d_inode); 1074 return 0; 1075 } 1076 1077 /** 1078 * v9fs_stat2inode - populate an inode structure with mistat info 1079 * @stat: Plan 9 metadata (mistat) structure 1080 * @inode: inode to populate 1081 * @sb: superblock of filesystem 1082 * 1083 */ 1084 1085 void 1086 v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 1087 struct super_block *sb) 1088 { 1089 char ext[32]; 1090 char tag_name[14]; 1091 unsigned int i_nlink; 1092 struct v9fs_session_info *v9ses = sb->s_fs_info; 1093 struct v9fs_inode *v9inode = V9FS_I(inode); 1094 1095 inode->i_nlink = 1; 1096 1097 inode->i_atime.tv_sec = stat->atime; 1098 inode->i_mtime.tv_sec = stat->mtime; 1099 inode->i_ctime.tv_sec = stat->mtime; 1100 1101 inode->i_uid = v9ses->dfltuid; 1102 inode->i_gid = v9ses->dfltgid; 1103 1104 if (v9fs_proto_dotu(v9ses)) { 1105 inode->i_uid = stat->n_uid; 1106 inode->i_gid = stat->n_gid; 1107 } 1108 if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { 1109 if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { 1110 /* 1111 * Hadlink support got added later to 1112 * to the .u extension. So there can be 1113 * server out there that doesn't support 1114 * this even with .u extension. So check 1115 * for non NULL stat->extension 1116 */ 1117 strncpy(ext, stat->extension, sizeof(ext)); 1118 /* HARDLINKCOUNT %u */ 1119 sscanf(ext, "%13s %u", tag_name, &i_nlink); 1120 if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) 1121 inode->i_nlink = i_nlink; 1122 } 1123 } 1124 inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 1125 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 1126 char type = 0; 1127 int major = -1; 1128 int minor = -1; 1129 1130 strncpy(ext, stat->extension, sizeof(ext)); 1131 sscanf(ext, "%c %u %u", &type, &major, &minor); 1132 switch (type) { 1133 case 'c': 1134 inode->i_mode &= ~S_IFBLK; 1135 inode->i_mode |= S_IFCHR; 1136 break; 1137 case 'b': 1138 break; 1139 default: 1140 P9_DPRINTK(P9_DEBUG_ERROR, 1141 "Unknown special type %c %s\n", type, 1142 stat->extension); 1143 }; 1144 inode->i_rdev = MKDEV(major, minor); 1145 init_special_inode(inode, inode->i_mode, inode->i_rdev); 1146 } else 1147 inode->i_rdev = 0; 1148 1149 i_size_write(inode, stat->length); 1150 1151 /* not real number of blocks, but 512 byte ones ... */ 1152 inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 1153 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; 1154 } 1155 1156 /** 1157 * v9fs_qid2ino - convert qid into inode number 1158 * @qid: qid to hash 1159 * 1160 * BUG: potential for inode number collisions? 1161 */ 1162 1163 ino_t v9fs_qid2ino(struct p9_qid *qid) 1164 { 1165 u64 path = qid->path + 2; 1166 ino_t i = 0; 1167 1168 if (sizeof(ino_t) == sizeof(path)) 1169 memcpy(&i, &path, sizeof(ino_t)); 1170 else 1171 i = (ino_t) (path ^ (path >> 32)); 1172 1173 return i; 1174 } 1175 1176 /** 1177 * v9fs_readlink - read a symlink's location (internal version) 1178 * @dentry: dentry for symlink 1179 * @buffer: buffer to load symlink location into 1180 * @buflen: length of buffer 1181 * 1182 */ 1183 1184 static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 1185 { 1186 int retval; 1187 1188 struct v9fs_session_info *v9ses; 1189 struct p9_fid *fid; 1190 struct p9_wstat *st; 1191 1192 P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 1193 retval = -EPERM; 1194 v9ses = v9fs_dentry2v9ses(dentry); 1195 fid = v9fs_fid_lookup(dentry); 1196 if (IS_ERR(fid)) 1197 return PTR_ERR(fid); 1198 1199 if (!v9fs_proto_dotu(v9ses)) 1200 return -EBADF; 1201 1202 st = p9_client_stat(fid); 1203 if (IS_ERR(st)) 1204 return PTR_ERR(st); 1205 1206 if (!(st->mode & P9_DMSYMLINK)) { 1207 retval = -EINVAL; 1208 goto done; 1209 } 1210 1211 /* copy extension buffer into buffer */ 1212 strncpy(buffer, st->extension, buflen); 1213 1214 P9_DPRINTK(P9_DEBUG_VFS, 1215 "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); 1216 1217 retval = strnlen(buffer, buflen); 1218 done: 1219 p9stat_free(st); 1220 kfree(st); 1221 return retval; 1222 } 1223 1224 /** 1225 * v9fs_vfs_follow_link - follow a symlink path 1226 * @dentry: dentry for symlink 1227 * @nd: nameidata 1228 * 1229 */ 1230 1231 static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 1232 { 1233 int len = 0; 1234 char *link = __getname(); 1235 1236 P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 1237 1238 if (!link) 1239 link = ERR_PTR(-ENOMEM); 1240 else { 1241 len = v9fs_readlink(dentry, link, PATH_MAX); 1242 1243 if (len < 0) { 1244 __putname(link); 1245 link = ERR_PTR(len); 1246 } else 1247 link[min(len, PATH_MAX-1)] = 0; 1248 } 1249 nd_set_link(nd, link); 1250 1251 return NULL; 1252 } 1253 1254 /** 1255 * v9fs_vfs_put_link - release a symlink path 1256 * @dentry: dentry for symlink 1257 * @nd: nameidata 1258 * @p: unused 1259 * 1260 */ 1261 1262 void 1263 v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 1264 { 1265 char *s = nd_get_link(nd); 1266 1267 P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, 1268 IS_ERR(s) ? "<error>" : s); 1269 if (!IS_ERR(s)) 1270 __putname(s); 1271 } 1272 1273 /** 1274 * v9fs_vfs_mkspecial - create a special file 1275 * @dir: inode to create special file in 1276 * @dentry: dentry to create 1277 * @mode: mode to create special file 1278 * @extension: 9p2000.u format extension string representing special file 1279 * 1280 */ 1281 1282 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1283 int mode, const char *extension) 1284 { 1285 u32 perm; 1286 struct p9_fid *fid; 1287 struct v9fs_session_info *v9ses; 1288 1289 v9ses = v9fs_inode2v9ses(dir); 1290 if (!v9fs_proto_dotu(v9ses)) { 1291 P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 1292 return -EPERM; 1293 } 1294 1295 perm = unixmode2p9mode(v9ses, mode); 1296 fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1297 P9_OREAD); 1298 if (IS_ERR(fid)) 1299 return PTR_ERR(fid); 1300 1301 v9fs_invalidate_inode_attr(dir); 1302 p9_client_clunk(fid); 1303 return 0; 1304 } 1305 1306 /** 1307 * v9fs_vfs_symlink - helper function to create symlinks 1308 * @dir: directory inode containing symlink 1309 * @dentry: dentry for symlink 1310 * @symname: symlink data 1311 * 1312 * See Also: 9P2000.u RFC for more information 1313 * 1314 */ 1315 1316 static int 1317 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1318 { 1319 P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1320 dentry->d_name.name, symname); 1321 1322 return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1323 } 1324 1325 /** 1326 * v9fs_vfs_link - create a hardlink 1327 * @old_dentry: dentry for file to link to 1328 * @dir: inode destination for new link 1329 * @dentry: dentry for link 1330 * 1331 */ 1332 1333 static int 1334 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 1335 struct dentry *dentry) 1336 { 1337 int retval; 1338 char *name; 1339 struct p9_fid *oldfid; 1340 1341 P9_DPRINTK(P9_DEBUG_VFS, 1342 " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 1343 old_dentry->d_name.name); 1344 1345 oldfid = v9fs_fid_clone(old_dentry); 1346 if (IS_ERR(oldfid)) 1347 return PTR_ERR(oldfid); 1348 1349 name = __getname(); 1350 if (unlikely(!name)) { 1351 retval = -ENOMEM; 1352 goto clunk_fid; 1353 } 1354 1355 sprintf(name, "%d\n", oldfid->fid); 1356 retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1357 __putname(name); 1358 if (!retval) { 1359 v9fs_refresh_inode(oldfid, old_dentry->d_inode); 1360 v9fs_invalidate_inode_attr(dir); 1361 } 1362 clunk_fid: 1363 p9_client_clunk(oldfid); 1364 return retval; 1365 } 1366 1367 /** 1368 * v9fs_vfs_mknod - create a special file 1369 * @dir: inode destination for new link 1370 * @dentry: dentry for file 1371 * @mode: mode for creation 1372 * @rdev: device associated with special file 1373 * 1374 */ 1375 1376 static int 1377 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 1378 { 1379 int retval; 1380 char *name; 1381 1382 P9_DPRINTK(P9_DEBUG_VFS, 1383 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 1384 dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 1385 1386 if (!new_valid_dev(rdev)) 1387 return -EINVAL; 1388 1389 name = __getname(); 1390 if (!name) 1391 return -ENOMEM; 1392 /* build extension */ 1393 if (S_ISBLK(mode)) 1394 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 1395 else if (S_ISCHR(mode)) 1396 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 1397 else if (S_ISFIFO(mode)) 1398 *name = 0; 1399 else if (S_ISSOCK(mode)) 1400 *name = 0; 1401 else { 1402 __putname(name); 1403 return -EINVAL; 1404 } 1405 1406 retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1407 __putname(name); 1408 1409 return retval; 1410 } 1411 1412 int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) 1413 { 1414 loff_t i_size; 1415 struct p9_wstat *st; 1416 struct v9fs_session_info *v9ses; 1417 1418 v9ses = v9fs_inode2v9ses(inode); 1419 st = p9_client_stat(fid); 1420 if (IS_ERR(st)) 1421 return PTR_ERR(st); 1422 1423 spin_lock(&inode->i_lock); 1424 /* 1425 * We don't want to refresh inode->i_size, 1426 * because we may have cached data 1427 */ 1428 i_size = inode->i_size; 1429 v9fs_stat2inode(st, inode, inode->i_sb); 1430 if (v9ses->cache) 1431 inode->i_size = i_size; 1432 spin_unlock(&inode->i_lock); 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 .symlink = v9fs_vfs_symlink, 1442 .link = v9fs_vfs_link, 1443 .unlink = v9fs_vfs_unlink, 1444 .mkdir = v9fs_vfs_mkdir, 1445 .rmdir = v9fs_vfs_rmdir, 1446 .mknod = v9fs_vfs_mknod, 1447 .rename = v9fs_vfs_rename, 1448 .getattr = v9fs_vfs_getattr, 1449 .setattr = v9fs_vfs_setattr, 1450 }; 1451 1452 static const struct inode_operations v9fs_dir_inode_operations = { 1453 .create = v9fs_vfs_create, 1454 .lookup = v9fs_vfs_lookup, 1455 .unlink = v9fs_vfs_unlink, 1456 .mkdir = v9fs_vfs_mkdir, 1457 .rmdir = v9fs_vfs_rmdir, 1458 .mknod = v9fs_vfs_mknod, 1459 .rename = v9fs_vfs_rename, 1460 .getattr = v9fs_vfs_getattr, 1461 .setattr = v9fs_vfs_setattr, 1462 }; 1463 1464 static const struct inode_operations v9fs_file_inode_operations = { 1465 .getattr = v9fs_vfs_getattr, 1466 .setattr = v9fs_vfs_setattr, 1467 }; 1468 1469 static const struct inode_operations v9fs_symlink_inode_operations = { 1470 .readlink = generic_readlink, 1471 .follow_link = v9fs_vfs_follow_link, 1472 .put_link = v9fs_vfs_put_link, 1473 .getattr = v9fs_vfs_getattr, 1474 .setattr = v9fs_vfs_setattr, 1475 }; 1476 1477