1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * namei.c 4 * 5 * Create and rename file, directory, symlinks 6 * 7 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 8 * 9 * Portions of this code from linux/fs/ext3/dir.c 10 * 11 * Copyright (C) 1992, 1993, 1994, 1995 12 * Remy Card (card@masi.ibp.fr) 13 * Laboratoire MASI - Institut Blaise pascal 14 * Universite Pierre et Marie Curie (Paris VI) 15 * 16 * from 17 * 18 * linux/fs/minix/dir.c 19 * 20 * Copyright (C) 1991, 1992 Linux Torvalds 21 */ 22 23 #include <linux/fs.h> 24 #include <linux/types.h> 25 #include <linux/slab.h> 26 #include <linux/highmem.h> 27 #include <linux/quotaops.h> 28 #include <linux/iversion.h> 29 30 #include <cluster/masklog.h> 31 32 #include "ocfs2.h" 33 34 #include "alloc.h" 35 #include "dcache.h" 36 #include "dir.h" 37 #include "dlmglue.h" 38 #include "extent_map.h" 39 #include "file.h" 40 #include "inode.h" 41 #include "journal.h" 42 #include "namei.h" 43 #include "suballoc.h" 44 #include "super.h" 45 #include "symlink.h" 46 #include "sysfile.h" 47 #include "uptodate.h" 48 #include "xattr.h" 49 #include "acl.h" 50 #include "ocfs2_trace.h" 51 #include "ioctl.h" 52 53 #include "buffer_head_io.h" 54 55 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 56 struct inode *dir, 57 struct inode *inode, 58 dev_t dev, 59 struct buffer_head **new_fe_bh, 60 struct buffer_head *parent_fe_bh, 61 handle_t *handle, 62 struct ocfs2_alloc_context *inode_ac); 63 64 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 65 struct inode **ret_orphan_dir, 66 u64 blkno, 67 char *name, 68 struct ocfs2_dir_lookup_result *lookup, 69 bool dio); 70 71 static int ocfs2_orphan_add(struct ocfs2_super *osb, 72 handle_t *handle, 73 struct inode *inode, 74 struct buffer_head *fe_bh, 75 char *name, 76 struct ocfs2_dir_lookup_result *lookup, 77 struct inode *orphan_dir_inode, 78 bool dio); 79 80 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 81 handle_t *handle, 82 struct inode *inode, 83 const char *symname); 84 85 static int ocfs2_double_lock(struct ocfs2_super *osb, 86 struct buffer_head **bh1, 87 struct inode *inode1, 88 struct buffer_head **bh2, 89 struct inode *inode2, 90 int rename); 91 92 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2); 93 /* An orphan dir name is an 8 byte value, printed as a hex string */ 94 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64))) 95 96 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, 97 unsigned int flags) 98 { 99 int status; 100 u64 blkno; 101 struct inode *inode = NULL; 102 struct dentry *ret; 103 struct ocfs2_inode_info *oi; 104 105 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len, 106 dentry->d_name.name, 107 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0); 108 109 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { 110 ret = ERR_PTR(-ENAMETOOLONG); 111 goto bail; 112 } 113 114 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT); 115 if (status < 0) { 116 if (status != -ENOENT) 117 mlog_errno(status); 118 ret = ERR_PTR(status); 119 goto bail; 120 } 121 122 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name, 123 dentry->d_name.len, &blkno); 124 if (status < 0) 125 goto bail_add; 126 127 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0); 128 if (IS_ERR(inode)) { 129 ret = ERR_PTR(-EACCES); 130 goto bail_unlock; 131 } 132 133 oi = OCFS2_I(inode); 134 /* Clear any orphaned state... If we were able to look up the 135 * inode from a directory, it certainly can't be orphaned. We 136 * might have the bad state from a node which intended to 137 * orphan this inode but crashed before it could commit the 138 * unlink. */ 139 spin_lock(&oi->ip_lock); 140 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; 141 spin_unlock(&oi->ip_lock); 142 143 bail_add: 144 ret = d_splice_alias(inode, dentry); 145 146 if (inode) { 147 /* 148 * If d_splice_alias() finds a DCACHE_DISCONNECTED 149 * dentry, it will d_move() it on top of ourse. The 150 * return value will indicate this however, so in 151 * those cases, we switch them around for the locking 152 * code. 153 * 154 * NOTE: This dentry already has ->d_op set from 155 * ocfs2_get_parent() and ocfs2_get_dentry() 156 */ 157 if (!IS_ERR_OR_NULL(ret)) 158 dentry = ret; 159 160 status = ocfs2_dentry_attach_lock(dentry, inode, 161 OCFS2_I(dir)->ip_blkno); 162 if (status) { 163 mlog_errno(status); 164 ret = ERR_PTR(status); 165 goto bail_unlock; 166 } 167 } else 168 ocfs2_dentry_attach_gen(dentry); 169 170 bail_unlock: 171 /* Don't drop the cluster lock until *after* the d_add -- 172 * unlink on another node will message us to remove that 173 * dentry under this lock so otherwise we can race this with 174 * the downconvert thread and have a stale dentry. */ 175 ocfs2_inode_unlock(dir, 0); 176 177 bail: 178 179 trace_ocfs2_lookup_ret(ret); 180 181 return ret; 182 } 183 184 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode) 185 { 186 struct inode *inode; 187 int status; 188 189 inode = new_inode(dir->i_sb); 190 if (!inode) { 191 mlog(ML_ERROR, "new_inode failed!\n"); 192 return ERR_PTR(-ENOMEM); 193 } 194 195 /* populate as many fields early on as possible - many of 196 * these are used by the support functions here and in 197 * callers. */ 198 if (S_ISDIR(mode)) 199 set_nlink(inode, 2); 200 mode = mode_strip_sgid(&nop_mnt_idmap, dir, mode); 201 inode_init_owner(&nop_mnt_idmap, inode, dir, mode); 202 status = dquot_initialize(inode); 203 if (status) { 204 iput(inode); 205 return ERR_PTR(status); 206 } 207 208 return inode; 209 } 210 211 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb, 212 struct dentry *dentry, struct inode *inode) 213 { 214 struct ocfs2_dentry_lock *dl = dentry->d_fsdata; 215 216 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres); 217 ocfs2_lock_res_free(&dl->dl_lockres); 218 BUG_ON(dl->dl_count != 1); 219 spin_lock(&dentry_attach_lock); 220 dentry->d_fsdata = NULL; 221 spin_unlock(&dentry_attach_lock); 222 kfree(dl); 223 iput(inode); 224 } 225 226 static int ocfs2_mknod(struct mnt_idmap *idmap, 227 struct inode *dir, 228 struct dentry *dentry, 229 umode_t mode, 230 dev_t dev) 231 { 232 int status = 0; 233 struct buffer_head *parent_fe_bh = NULL; 234 handle_t *handle = NULL; 235 struct ocfs2_super *osb; 236 struct ocfs2_dinode *dirfe; 237 struct ocfs2_dinode *fe = NULL; 238 struct buffer_head *new_fe_bh = NULL; 239 struct inode *inode = NULL; 240 struct ocfs2_alloc_context *inode_ac = NULL; 241 struct ocfs2_alloc_context *data_ac = NULL; 242 struct ocfs2_alloc_context *meta_ac = NULL; 243 int want_clusters = 0; 244 int want_meta = 0; 245 int xattr_credits = 0; 246 struct ocfs2_security_xattr_info si = { 247 .name = NULL, 248 .enable = 1, 249 }; 250 int did_quota_inode = 0; 251 struct ocfs2_dir_lookup_result lookup = { NULL, }; 252 sigset_t oldset; 253 int did_block_signals = 0; 254 struct ocfs2_dentry_lock *dl = NULL; 255 256 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name, 257 (unsigned long long)OCFS2_I(dir)->ip_blkno, 258 (unsigned long)dev, mode); 259 260 status = dquot_initialize(dir); 261 if (status) { 262 mlog_errno(status); 263 return status; 264 } 265 266 /* get our super block */ 267 osb = OCFS2_SB(dir->i_sb); 268 269 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 270 if (status < 0) { 271 if (status != -ENOENT) 272 mlog_errno(status); 273 return status; 274 } 275 276 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) { 277 status = -EMLINK; 278 goto leave; 279 } 280 281 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 282 if (!ocfs2_read_links_count(dirfe)) { 283 /* can't make a file in a deleted directory. */ 284 status = -ENOENT; 285 goto leave; 286 } 287 288 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 289 dentry->d_name.len); 290 if (status) 291 goto leave; 292 293 /* get a spot inside the dir. */ 294 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 295 dentry->d_name.name, 296 dentry->d_name.len, &lookup); 297 if (status < 0) { 298 mlog_errno(status); 299 goto leave; 300 } 301 302 /* reserve an inode spot */ 303 status = ocfs2_reserve_new_inode(osb, &inode_ac); 304 if (status < 0) { 305 if (status != -ENOSPC) 306 mlog_errno(status); 307 goto leave; 308 } 309 310 inode = ocfs2_get_init_inode(dir, mode); 311 if (IS_ERR(inode)) { 312 status = PTR_ERR(inode); 313 inode = NULL; 314 mlog_errno(status); 315 goto leave; 316 } 317 318 /* get security xattr */ 319 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 320 if (status) { 321 if (status == -EOPNOTSUPP) 322 si.enable = 0; 323 else { 324 mlog_errno(status); 325 goto leave; 326 } 327 } 328 329 /* calculate meta data/clusters for setting security and acl xattr */ 330 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode, 331 &si, &want_clusters, 332 &xattr_credits, &want_meta); 333 if (status < 0) { 334 mlog_errno(status); 335 goto leave; 336 } 337 338 /* Reserve a cluster if creating an extent based directory. */ 339 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { 340 want_clusters += 1; 341 342 /* Dir indexing requires extra space as well */ 343 if (ocfs2_supports_indexed_dirs(osb)) 344 want_meta++; 345 } 346 347 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac); 348 if (status < 0) { 349 if (status != -ENOSPC) 350 mlog_errno(status); 351 goto leave; 352 } 353 354 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 355 if (status < 0) { 356 if (status != -ENOSPC) 357 mlog_errno(status); 358 goto leave; 359 } 360 361 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 362 S_ISDIR(mode), 363 xattr_credits)); 364 if (IS_ERR(handle)) { 365 status = PTR_ERR(handle); 366 handle = NULL; 367 mlog_errno(status); 368 goto leave; 369 } 370 371 /* Starting to change things, restart is no longer possible. */ 372 ocfs2_block_signals(&oldset); 373 did_block_signals = 1; 374 375 status = dquot_alloc_inode(inode); 376 if (status) 377 goto leave; 378 did_quota_inode = 1; 379 380 /* do the real work now. */ 381 status = ocfs2_mknod_locked(osb, dir, inode, dev, 382 &new_fe_bh, parent_fe_bh, handle, 383 inode_ac); 384 if (status < 0) { 385 mlog_errno(status); 386 goto leave; 387 } 388 389 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 390 if (S_ISDIR(mode)) { 391 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 392 new_fe_bh, data_ac, meta_ac); 393 if (status < 0) { 394 mlog_errno(status); 395 goto leave; 396 } 397 398 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir), 399 parent_fe_bh, 400 OCFS2_JOURNAL_ACCESS_WRITE); 401 if (status < 0) { 402 mlog_errno(status); 403 goto leave; 404 } 405 ocfs2_add_links_count(dirfe, 1); 406 ocfs2_journal_dirty(handle, parent_fe_bh); 407 inc_nlink(dir); 408 } 409 410 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh, 411 meta_ac, data_ac); 412 413 if (status < 0) { 414 mlog_errno(status); 415 goto roll_back; 416 } 417 418 if (si.enable) { 419 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 420 meta_ac, data_ac); 421 if (status < 0) { 422 mlog_errno(status); 423 goto roll_back; 424 } 425 } 426 427 /* 428 * Do this before adding the entry to the directory. We add 429 * also set d_op after success so that ->d_iput() will cleanup 430 * the dentry lock even if ocfs2_add_entry() fails below. 431 */ 432 status = ocfs2_dentry_attach_lock(dentry, inode, 433 OCFS2_I(dir)->ip_blkno); 434 if (status) { 435 mlog_errno(status); 436 goto roll_back; 437 } 438 439 dl = dentry->d_fsdata; 440 441 status = ocfs2_add_entry(handle, dentry, inode, 442 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 443 &lookup); 444 if (status < 0) { 445 mlog_errno(status); 446 goto roll_back; 447 } 448 449 insert_inode_hash(inode); 450 d_instantiate(dentry, inode); 451 status = 0; 452 453 roll_back: 454 if (status < 0 && S_ISDIR(mode)) { 455 ocfs2_add_links_count(dirfe, -1); 456 drop_nlink(dir); 457 } 458 459 leave: 460 if (status < 0 && did_quota_inode) 461 dquot_free_inode(inode); 462 if (handle) { 463 if (status < 0 && fe) 464 ocfs2_set_links_count(fe, 0); 465 ocfs2_commit_trans(osb, handle); 466 } 467 468 ocfs2_inode_unlock(dir, 1); 469 if (did_block_signals) 470 ocfs2_unblock_signals(&oldset); 471 472 brelse(new_fe_bh); 473 brelse(parent_fe_bh); 474 kfree(si.value); 475 476 ocfs2_free_dir_lookup_result(&lookup); 477 478 if (inode_ac) 479 ocfs2_free_alloc_context(inode_ac); 480 481 if (data_ac) 482 ocfs2_free_alloc_context(data_ac); 483 484 if (meta_ac) 485 ocfs2_free_alloc_context(meta_ac); 486 487 /* 488 * We should call iput after the i_rwsem of the bitmap been 489 * unlocked in ocfs2_free_alloc_context, or the 490 * ocfs2_delete_inode will mutex_lock again. 491 */ 492 if ((status < 0) && inode) { 493 if (dl) 494 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 495 496 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 497 clear_nlink(inode); 498 iput(inode); 499 } 500 501 if (status) 502 mlog_errno(status); 503 504 return status; 505 } 506 507 static int __ocfs2_mknod_locked(struct inode *dir, 508 struct inode *inode, 509 dev_t dev, 510 struct buffer_head **new_fe_bh, 511 struct buffer_head *parent_fe_bh, 512 handle_t *handle, 513 struct ocfs2_alloc_context *inode_ac, 514 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit) 515 { 516 int status = 0; 517 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 518 struct ocfs2_dinode *fe = NULL; 519 struct ocfs2_extent_list *fel; 520 u16 feat; 521 struct ocfs2_inode_info *oi = OCFS2_I(inode); 522 struct timespec64 ts; 523 524 *new_fe_bh = NULL; 525 526 /* populate as many fields early on as possible - many of 527 * these are used by the support functions here and in 528 * callers. */ 529 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 530 oi->ip_blkno = fe_blkno; 531 spin_lock(&osb->osb_lock); 532 inode->i_generation = osb->s_next_generation++; 533 spin_unlock(&osb->osb_lock); 534 535 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 536 if (!*new_fe_bh) { 537 status = -ENOMEM; 538 mlog_errno(status); 539 goto leave; 540 } 541 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh); 542 543 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 544 *new_fe_bh, 545 OCFS2_JOURNAL_ACCESS_CREATE); 546 if (status < 0) { 547 mlog_errno(status); 548 goto leave; 549 } 550 551 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 552 memset(fe, 0, osb->sb->s_blocksize); 553 554 fe->i_generation = cpu_to_le32(inode->i_generation); 555 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 556 fe->i_blkno = cpu_to_le64(fe_blkno); 557 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc); 558 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 559 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); 560 fe->i_uid = cpu_to_le32(i_uid_read(inode)); 561 fe->i_gid = cpu_to_le32(i_gid_read(inode)); 562 fe->i_mode = cpu_to_le16(inode->i_mode); 563 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 564 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 565 566 ocfs2_set_links_count(fe, inode->i_nlink); 567 568 fe->i_last_eb_blk = 0; 569 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 570 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL); 571 ktime_get_coarse_real_ts64(&ts); 572 fe->i_atime = fe->i_ctime = fe->i_mtime = 573 cpu_to_le64(ts.tv_sec); 574 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 575 cpu_to_le32(ts.tv_nsec); 576 fe->i_dtime = 0; 577 578 /* 579 * If supported, directories start with inline data. If inline 580 * isn't supported, but indexing is, we start them as indexed. 581 */ 582 feat = le16_to_cpu(fe->i_dyn_features); 583 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) { 584 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); 585 586 fe->id2.i_data.id_count = cpu_to_le16( 587 ocfs2_max_inline_data_with_xattr(osb->sb, fe)); 588 } else { 589 fel = &fe->id2.i_list; 590 fel->l_tree_depth = 0; 591 fel->l_next_free_rec = 0; 592 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 593 } 594 595 ocfs2_journal_dirty(handle, *new_fe_bh); 596 597 ocfs2_populate_inode(inode, fe, 1); 598 ocfs2_ci_set_new(osb, INODE_CACHE(inode)); 599 if (!ocfs2_mount_local(osb)) { 600 status = ocfs2_create_new_inode_locks(inode); 601 if (status < 0) 602 mlog_errno(status); 603 } 604 605 ocfs2_update_inode_fsync_trans(handle, inode, 1); 606 607 leave: 608 if (status < 0) { 609 if (*new_fe_bh) { 610 brelse(*new_fe_bh); 611 *new_fe_bh = NULL; 612 } 613 } 614 615 if (status) 616 mlog_errno(status); 617 return status; 618 } 619 620 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 621 struct inode *dir, 622 struct inode *inode, 623 dev_t dev, 624 struct buffer_head **new_fe_bh, 625 struct buffer_head *parent_fe_bh, 626 handle_t *handle, 627 struct ocfs2_alloc_context *inode_ac) 628 { 629 int status = 0; 630 u64 suballoc_loc, fe_blkno = 0; 631 u16 suballoc_bit; 632 633 *new_fe_bh = NULL; 634 635 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh, 636 inode_ac, &suballoc_loc, 637 &suballoc_bit, &fe_blkno); 638 if (status < 0) { 639 mlog_errno(status); 640 return status; 641 } 642 643 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, 644 parent_fe_bh, handle, inode_ac, 645 fe_blkno, suballoc_loc, suballoc_bit); 646 } 647 648 static int ocfs2_mkdir(struct mnt_idmap *idmap, 649 struct inode *dir, 650 struct dentry *dentry, 651 umode_t mode) 652 { 653 int ret; 654 655 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, 656 OCFS2_I(dir)->ip_blkno, mode); 657 ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFDIR, 0); 658 if (ret) 659 mlog_errno(ret); 660 661 return ret; 662 } 663 664 static int ocfs2_create(struct mnt_idmap *idmap, 665 struct inode *dir, 666 struct dentry *dentry, 667 umode_t mode, 668 bool excl) 669 { 670 int ret; 671 672 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name, 673 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode); 674 ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFREG, 0); 675 if (ret) 676 mlog_errno(ret); 677 678 return ret; 679 } 680 681 static int ocfs2_link(struct dentry *old_dentry, 682 struct inode *dir, 683 struct dentry *dentry) 684 { 685 handle_t *handle; 686 struct inode *inode = d_inode(old_dentry); 687 struct inode *old_dir = d_inode(old_dentry->d_parent); 688 int err; 689 struct buffer_head *fe_bh = NULL; 690 struct buffer_head *old_dir_bh = NULL; 691 struct buffer_head *parent_fe_bh = NULL; 692 struct ocfs2_dinode *fe = NULL; 693 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 694 struct ocfs2_dir_lookup_result lookup = { NULL, }; 695 sigset_t oldset; 696 u64 old_de_ino; 697 698 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno, 699 old_dentry->d_name.len, old_dentry->d_name.name, 700 dentry->d_name.len, dentry->d_name.name); 701 702 if (S_ISDIR(inode->i_mode)) 703 return -EPERM; 704 705 err = dquot_initialize(dir); 706 if (err) { 707 mlog_errno(err); 708 return err; 709 } 710 711 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 712 &parent_fe_bh, dir, 0); 713 if (err < 0) { 714 if (err != -ENOENT) 715 mlog_errno(err); 716 return err; 717 } 718 719 /* make sure both dirs have bhs 720 * get an extra ref on old_dir_bh if old==new */ 721 if (!parent_fe_bh) { 722 if (old_dir_bh) { 723 parent_fe_bh = old_dir_bh; 724 get_bh(parent_fe_bh); 725 } else { 726 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str); 727 err = -EIO; 728 goto out; 729 } 730 } 731 732 if (!dir->i_nlink) { 733 err = -ENOENT; 734 goto out; 735 } 736 737 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 738 old_dentry->d_name.len, &old_de_ino); 739 if (err) { 740 err = -ENOENT; 741 goto out; 742 } 743 744 /* 745 * Check whether another node removed the source inode while we 746 * were in the vfs. 747 */ 748 if (old_de_ino != OCFS2_I(inode)->ip_blkno) { 749 err = -ENOENT; 750 goto out; 751 } 752 753 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 754 dentry->d_name.len); 755 if (err) 756 goto out; 757 758 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 759 dentry->d_name.name, 760 dentry->d_name.len, &lookup); 761 if (err < 0) { 762 mlog_errno(err); 763 goto out; 764 } 765 766 err = ocfs2_inode_lock(inode, &fe_bh, 1); 767 if (err < 0) { 768 if (err != -ENOENT) 769 mlog_errno(err); 770 goto out; 771 } 772 773 fe = (struct ocfs2_dinode *) fe_bh->b_data; 774 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { 775 err = -EMLINK; 776 goto out_unlock_inode; 777 } 778 779 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); 780 if (IS_ERR(handle)) { 781 err = PTR_ERR(handle); 782 handle = NULL; 783 mlog_errno(err); 784 goto out_unlock_inode; 785 } 786 787 /* Starting to change things, restart is no longer possible. */ 788 ocfs2_block_signals(&oldset); 789 790 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 791 OCFS2_JOURNAL_ACCESS_WRITE); 792 if (err < 0) { 793 mlog_errno(err); 794 goto out_commit; 795 } 796 797 inc_nlink(inode); 798 inode_set_ctime_current(inode); 799 ocfs2_set_links_count(fe, inode->i_nlink); 800 fe->i_ctime = cpu_to_le64(inode_get_ctime_sec(inode)); 801 fe->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(inode)); 802 ocfs2_update_inode_fsync_trans(handle, inode, 0); 803 ocfs2_journal_dirty(handle, fe_bh); 804 805 err = ocfs2_add_entry(handle, dentry, inode, 806 OCFS2_I(inode)->ip_blkno, 807 parent_fe_bh, &lookup); 808 if (err) { 809 ocfs2_add_links_count(fe, -1); 810 drop_nlink(inode); 811 mlog_errno(err); 812 goto out_commit; 813 } 814 815 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 816 if (err) { 817 mlog_errno(err); 818 goto out_commit; 819 } 820 821 ihold(inode); 822 d_instantiate(dentry, inode); 823 824 out_commit: 825 ocfs2_commit_trans(osb, handle); 826 ocfs2_unblock_signals(&oldset); 827 out_unlock_inode: 828 ocfs2_inode_unlock(inode, 1); 829 830 out: 831 ocfs2_double_unlock(old_dir, dir); 832 833 brelse(fe_bh); 834 brelse(parent_fe_bh); 835 brelse(old_dir_bh); 836 837 ocfs2_free_dir_lookup_result(&lookup); 838 839 if (err) 840 mlog_errno(err); 841 842 return err; 843 } 844 845 /* 846 * Takes and drops an exclusive lock on the given dentry. This will 847 * force other nodes to drop it. 848 */ 849 static int ocfs2_remote_dentry_delete(struct dentry *dentry) 850 { 851 int ret; 852 853 ret = ocfs2_dentry_lock(dentry, 1); 854 if (ret) 855 mlog_errno(ret); 856 else 857 ocfs2_dentry_unlock(dentry, 1); 858 859 return ret; 860 } 861 862 static inline int ocfs2_inode_is_unlinkable(struct inode *inode) 863 { 864 if (S_ISDIR(inode->i_mode)) { 865 if (inode->i_nlink == 2) 866 return 1; 867 return 0; 868 } 869 870 if (inode->i_nlink == 1) 871 return 1; 872 return 0; 873 } 874 875 static int ocfs2_unlink(struct inode *dir, 876 struct dentry *dentry) 877 { 878 int status; 879 int child_locked = 0; 880 bool is_unlinkable = false; 881 struct inode *inode = d_inode(dentry); 882 struct inode *orphan_dir = NULL; 883 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 884 u64 blkno; 885 struct ocfs2_dinode *fe = NULL; 886 struct buffer_head *fe_bh = NULL; 887 struct buffer_head *parent_node_bh = NULL; 888 handle_t *handle = NULL; 889 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 890 struct ocfs2_dir_lookup_result lookup = { NULL, }; 891 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 892 893 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, 894 dentry->d_name.name, 895 (unsigned long long)OCFS2_I(dir)->ip_blkno, 896 (unsigned long long)OCFS2_I(inode)->ip_blkno); 897 898 status = dquot_initialize(dir); 899 if (status) { 900 mlog_errno(status); 901 return status; 902 } 903 904 BUG_ON(d_inode(dentry->d_parent) != dir); 905 906 if (inode == osb->root_inode) 907 return -EPERM; 908 909 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 910 OI_LS_PARENT); 911 if (status < 0) { 912 if (status != -ENOENT) 913 mlog_errno(status); 914 return status; 915 } 916 917 status = ocfs2_find_files_on_disk(dentry->d_name.name, 918 dentry->d_name.len, &blkno, dir, 919 &lookup); 920 if (status < 0) { 921 if (status != -ENOENT) 922 mlog_errno(status); 923 goto leave; 924 } 925 926 if (OCFS2_I(inode)->ip_blkno != blkno) { 927 status = -ENOENT; 928 929 trace_ocfs2_unlink_noent( 930 (unsigned long long)OCFS2_I(inode)->ip_blkno, 931 (unsigned long long)blkno, 932 OCFS2_I(inode)->ip_flags); 933 goto leave; 934 } 935 936 status = ocfs2_inode_lock(inode, &fe_bh, 1); 937 if (status < 0) { 938 if (status != -ENOENT) 939 mlog_errno(status); 940 goto leave; 941 } 942 child_locked = 1; 943 944 if (S_ISDIR(inode->i_mode)) { 945 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 946 status = -ENOTEMPTY; 947 goto leave; 948 } 949 } 950 951 status = ocfs2_remote_dentry_delete(dentry); 952 if (status < 0) { 953 /* This remote delete should succeed under all normal 954 * circumstances. */ 955 mlog_errno(status); 956 goto leave; 957 } 958 959 if (ocfs2_inode_is_unlinkable(inode)) { 960 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 961 OCFS2_I(inode)->ip_blkno, 962 orphan_name, &orphan_insert, 963 false); 964 if (status < 0) { 965 mlog_errno(status); 966 goto leave; 967 } 968 is_unlinkable = true; 969 } 970 971 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 972 if (IS_ERR(handle)) { 973 status = PTR_ERR(handle); 974 handle = NULL; 975 mlog_errno(status); 976 goto leave; 977 } 978 979 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 980 OCFS2_JOURNAL_ACCESS_WRITE); 981 if (status < 0) { 982 mlog_errno(status); 983 goto leave; 984 } 985 986 fe = (struct ocfs2_dinode *) fe_bh->b_data; 987 988 /* delete the name from the parent dir */ 989 status = ocfs2_delete_entry(handle, dir, &lookup); 990 if (status < 0) { 991 mlog_errno(status); 992 goto leave; 993 } 994 995 if (S_ISDIR(inode->i_mode)) 996 drop_nlink(inode); 997 drop_nlink(inode); 998 ocfs2_set_links_count(fe, inode->i_nlink); 999 ocfs2_update_inode_fsync_trans(handle, inode, 0); 1000 ocfs2_journal_dirty(handle, fe_bh); 1001 1002 inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); 1003 if (S_ISDIR(inode->i_mode)) 1004 drop_nlink(dir); 1005 1006 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 1007 if (status < 0) { 1008 mlog_errno(status); 1009 if (S_ISDIR(inode->i_mode)) 1010 inc_nlink(dir); 1011 goto leave; 1012 } 1013 1014 if (is_unlinkable) { 1015 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, 1016 orphan_name, &orphan_insert, orphan_dir, false); 1017 if (status < 0) 1018 mlog_errno(status); 1019 } 1020 1021 leave: 1022 if (handle) 1023 ocfs2_commit_trans(osb, handle); 1024 1025 if (orphan_dir) { 1026 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1027 ocfs2_inode_unlock(orphan_dir, 1); 1028 inode_unlock(orphan_dir); 1029 iput(orphan_dir); 1030 } 1031 1032 if (child_locked) 1033 ocfs2_inode_unlock(inode, 1); 1034 1035 ocfs2_inode_unlock(dir, 1); 1036 1037 brelse(fe_bh); 1038 brelse(parent_node_bh); 1039 1040 ocfs2_free_dir_lookup_result(&orphan_insert); 1041 ocfs2_free_dir_lookup_result(&lookup); 1042 1043 if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) 1044 mlog_errno(status); 1045 1046 return status; 1047 } 1048 1049 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, 1050 u64 src_inode_no, u64 dest_inode_no) 1051 { 1052 int ret = 0, i = 0; 1053 u64 parent_inode_no = 0; 1054 u64 child_inode_no = src_inode_no; 1055 struct inode *child_inode; 1056 1057 #define MAX_LOOKUP_TIMES 32 1058 while (1) { 1059 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); 1060 if (IS_ERR(child_inode)) { 1061 ret = PTR_ERR(child_inode); 1062 break; 1063 } 1064 1065 ret = ocfs2_inode_lock(child_inode, NULL, 0); 1066 if (ret < 0) { 1067 iput(child_inode); 1068 if (ret != -ENOENT) 1069 mlog_errno(ret); 1070 break; 1071 } 1072 1073 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, 1074 &parent_inode_no); 1075 ocfs2_inode_unlock(child_inode, 0); 1076 iput(child_inode); 1077 if (ret < 0) { 1078 ret = -ENOENT; 1079 break; 1080 } 1081 1082 if (parent_inode_no == dest_inode_no) { 1083 ret = 1; 1084 break; 1085 } 1086 1087 if (parent_inode_no == osb->root_inode->i_ino) { 1088 ret = 0; 1089 break; 1090 } 1091 1092 child_inode_no = parent_inode_no; 1093 1094 if (++i >= MAX_LOOKUP_TIMES) { 1095 mlog_ratelimited(ML_NOTICE, "max lookup times reached, " 1096 "filesystem may have nested directories, " 1097 "src inode: %llu, dest inode: %llu.\n", 1098 (unsigned long long)src_inode_no, 1099 (unsigned long long)dest_inode_no); 1100 ret = 0; 1101 break; 1102 } 1103 } 1104 1105 return ret; 1106 } 1107 1108 /* 1109 * The only place this should be used is rename and link! 1110 * if they have the same id, then the 1st one is the only one locked. 1111 */ 1112 static int ocfs2_double_lock(struct ocfs2_super *osb, 1113 struct buffer_head **bh1, 1114 struct inode *inode1, 1115 struct buffer_head **bh2, 1116 struct inode *inode2, 1117 int rename) 1118 { 1119 int status; 1120 int inode1_is_ancestor, inode2_is_ancestor; 1121 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 1122 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 1123 1124 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 1125 (unsigned long long)oi2->ip_blkno); 1126 1127 if (*bh1) 1128 *bh1 = NULL; 1129 if (*bh2) 1130 *bh2 = NULL; 1131 1132 /* we always want to lock the one with the lower lockid first. 1133 * and if they are nested, we lock ancestor first */ 1134 if (oi1->ip_blkno != oi2->ip_blkno) { 1135 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, 1136 oi1->ip_blkno); 1137 if (inode1_is_ancestor < 0) { 1138 status = inode1_is_ancestor; 1139 goto bail; 1140 } 1141 1142 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, 1143 oi2->ip_blkno); 1144 if (inode2_is_ancestor < 0) { 1145 status = inode2_is_ancestor; 1146 goto bail; 1147 } 1148 1149 if ((inode1_is_ancestor == 1) || 1150 (oi1->ip_blkno < oi2->ip_blkno && 1151 inode2_is_ancestor == 0)) { 1152 /* switch id1 and id2 around */ 1153 swap(bh2, bh1); 1154 swap(inode2, inode1); 1155 } 1156 /* lock id2 */ 1157 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 1158 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); 1159 if (status < 0) { 1160 if (status != -ENOENT) 1161 mlog_errno(status); 1162 goto bail; 1163 } 1164 } 1165 1166 /* lock id1 */ 1167 status = ocfs2_inode_lock_nested(inode1, bh1, 1, 1168 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 1169 if (status < 0) { 1170 /* 1171 * An error return must mean that no cluster locks 1172 * were held on function exit. 1173 */ 1174 if (oi1->ip_blkno != oi2->ip_blkno) { 1175 ocfs2_inode_unlock(inode2, 1); 1176 brelse(*bh2); 1177 *bh2 = NULL; 1178 } 1179 1180 if (status != -ENOENT) 1181 mlog_errno(status); 1182 } 1183 1184 trace_ocfs2_double_lock_end( 1185 (unsigned long long)oi1->ip_blkno, 1186 (unsigned long long)oi2->ip_blkno); 1187 1188 bail: 1189 if (status) 1190 mlog_errno(status); 1191 return status; 1192 } 1193 1194 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1195 { 1196 ocfs2_inode_unlock(inode1, 1); 1197 1198 if (inode1 != inode2) 1199 ocfs2_inode_unlock(inode2, 1); 1200 } 1201 1202 static int ocfs2_rename(struct mnt_idmap *idmap, 1203 struct inode *old_dir, 1204 struct dentry *old_dentry, 1205 struct inode *new_dir, 1206 struct dentry *new_dentry, 1207 unsigned int flags) 1208 { 1209 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1210 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1211 struct inode *old_inode = d_inode(old_dentry); 1212 struct inode *new_inode = d_inode(new_dentry); 1213 struct inode *orphan_dir = NULL; 1214 struct ocfs2_dinode *newfe = NULL; 1215 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1216 struct buffer_head *newfe_bh = NULL; 1217 struct buffer_head *old_inode_bh = NULL; 1218 struct ocfs2_super *osb = NULL; 1219 u64 newfe_blkno, old_de_ino; 1220 handle_t *handle = NULL; 1221 struct buffer_head *old_dir_bh = NULL; 1222 struct buffer_head *new_dir_bh = NULL; 1223 u32 old_dir_nlink = old_dir->i_nlink; 1224 struct ocfs2_dinode *old_di; 1225 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1226 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1227 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1228 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1229 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1230 bool should_add_orphan = false; 1231 1232 if (flags) 1233 return -EINVAL; 1234 1235 /* At some point it might be nice to break this function up a 1236 * bit. */ 1237 1238 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, 1239 old_dentry->d_name.len, old_dentry->d_name.name, 1240 new_dentry->d_name.len, new_dentry->d_name.name); 1241 1242 status = dquot_initialize(old_dir); 1243 if (status) { 1244 mlog_errno(status); 1245 goto bail; 1246 } 1247 status = dquot_initialize(new_dir); 1248 if (status) { 1249 mlog_errno(status); 1250 goto bail; 1251 } 1252 1253 osb = OCFS2_SB(old_dir->i_sb); 1254 1255 if (new_inode) { 1256 if (!igrab(new_inode)) 1257 BUG(); 1258 } 1259 1260 /* Assume a directory hierarchy thusly: 1261 * a/b/c 1262 * a/d 1263 * a,b,c, and d are all directories. 1264 * 1265 * from cwd of 'a' on both nodes: 1266 * node1: mv b/c d 1267 * node2: mv d b/c 1268 * 1269 * And that's why, just like the VFS, we need a file system 1270 * rename lock. */ 1271 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1272 status = ocfs2_rename_lock(osb); 1273 if (status < 0) { 1274 mlog_errno(status); 1275 goto bail; 1276 } 1277 rename_lock = 1; 1278 1279 /* here we cannot guarantee the inodes haven't just been 1280 * changed, so check if they are nested again */ 1281 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, 1282 old_inode->i_ino); 1283 if (status < 0) { 1284 mlog_errno(status); 1285 goto bail; 1286 } else if (status == 1) { 1287 status = -EPERM; 1288 trace_ocfs2_rename_not_permitted( 1289 (unsigned long long)old_inode->i_ino, 1290 (unsigned long long)new_dir->i_ino); 1291 goto bail; 1292 } 1293 } 1294 1295 /* if old and new are the same, this'll just do one lock. */ 1296 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1297 &new_dir_bh, new_dir, 1); 1298 if (status < 0) { 1299 mlog_errno(status); 1300 goto bail; 1301 } 1302 parents_locked = 1; 1303 1304 if (!new_dir->i_nlink) { 1305 status = -EACCES; 1306 goto bail; 1307 } 1308 1309 /* make sure both dirs have bhs 1310 * get an extra ref on old_dir_bh if old==new */ 1311 if (!new_dir_bh) { 1312 if (old_dir_bh) { 1313 new_dir_bh = old_dir_bh; 1314 get_bh(new_dir_bh); 1315 } else { 1316 mlog(ML_ERROR, "no old_dir_bh!\n"); 1317 status = -EIO; 1318 goto bail; 1319 } 1320 } 1321 1322 /* 1323 * Aside from allowing a meta data update, the locking here 1324 * also ensures that the downconvert thread on other nodes 1325 * won't have to concurrently downconvert the inode and the 1326 * dentry locks. 1327 */ 1328 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1329 OI_LS_PARENT); 1330 if (status < 0) { 1331 if (status != -ENOENT) 1332 mlog_errno(status); 1333 goto bail; 1334 } 1335 old_child_locked = 1; 1336 1337 status = ocfs2_remote_dentry_delete(old_dentry); 1338 if (status < 0) { 1339 mlog_errno(status); 1340 goto bail; 1341 } 1342 1343 if (S_ISDIR(old_inode->i_mode)) { 1344 u64 old_inode_parent; 1345 1346 update_dot_dot = 1; 1347 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1348 old_inode, 1349 &old_inode_dot_dot_res); 1350 if (status) { 1351 status = -EIO; 1352 goto bail; 1353 } 1354 1355 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1356 status = -EIO; 1357 goto bail; 1358 } 1359 1360 if (!new_inode && new_dir != old_dir && 1361 new_dir->i_nlink >= ocfs2_link_max(osb)) { 1362 status = -EMLINK; 1363 goto bail; 1364 } 1365 } 1366 1367 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1368 old_dentry->d_name.len, 1369 &old_de_ino); 1370 if (status) { 1371 status = -ENOENT; 1372 goto bail; 1373 } 1374 1375 /* 1376 * Check for inode number is _not_ due to possible IO errors. 1377 * We might rmdir the source, keep it as pwd of some process 1378 * and merrily kill the link to whatever was created under the 1379 * same name. Goodbye sticky bit ;-< 1380 */ 1381 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1382 status = -ENOENT; 1383 goto bail; 1384 } 1385 1386 /* check if the target already exists (in which case we need 1387 * to delete it */ 1388 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1389 new_dentry->d_name.len, 1390 &newfe_blkno, new_dir, 1391 &target_lookup_res); 1392 /* The only error we allow here is -ENOENT because the new 1393 * file not existing is perfectly valid. */ 1394 if ((status < 0) && (status != -ENOENT)) { 1395 /* If we cannot find the file specified we should just */ 1396 /* return the error... */ 1397 mlog_errno(status); 1398 goto bail; 1399 } 1400 if (status == 0) 1401 target_exists = 1; 1402 1403 if (!target_exists && new_inode) { 1404 /* 1405 * Target was unlinked by another node while we were 1406 * waiting to get to ocfs2_rename(). There isn't 1407 * anything we can do here to help the situation, so 1408 * bubble up the appropriate error. 1409 */ 1410 status = -ENOENT; 1411 goto bail; 1412 } 1413 1414 /* In case we need to overwrite an existing file, we blow it 1415 * away first */ 1416 if (target_exists) { 1417 /* VFS didn't think there existed an inode here, but 1418 * someone else in the cluster must have raced our 1419 * rename to create one. Today we error cleanly, in 1420 * the future we should consider calling iget to build 1421 * a new struct inode for this entry. */ 1422 if (!new_inode) { 1423 status = -EACCES; 1424 1425 trace_ocfs2_rename_target_exists(new_dentry->d_name.len, 1426 new_dentry->d_name.name); 1427 goto bail; 1428 } 1429 1430 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1431 status = -EACCES; 1432 1433 trace_ocfs2_rename_disagree( 1434 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1435 (unsigned long long)newfe_blkno, 1436 OCFS2_I(new_inode)->ip_flags); 1437 goto bail; 1438 } 1439 1440 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1441 if (status < 0) { 1442 if (status != -ENOENT) 1443 mlog_errno(status); 1444 goto bail; 1445 } 1446 new_child_locked = 1; 1447 1448 status = ocfs2_remote_dentry_delete(new_dentry); 1449 if (status < 0) { 1450 mlog_errno(status); 1451 goto bail; 1452 } 1453 1454 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1455 1456 trace_ocfs2_rename_over_existing( 1457 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1458 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1459 1460 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1461 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1462 OCFS2_I(new_inode)->ip_blkno, 1463 orphan_name, &orphan_insert, 1464 false); 1465 if (status < 0) { 1466 mlog_errno(status); 1467 goto bail; 1468 } 1469 should_add_orphan = true; 1470 } 1471 } else { 1472 BUG_ON(d_inode(new_dentry->d_parent) != new_dir); 1473 1474 status = ocfs2_check_dir_for_entry(new_dir, 1475 new_dentry->d_name.name, 1476 new_dentry->d_name.len); 1477 if (status) 1478 goto bail; 1479 1480 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1481 new_dentry->d_name.name, 1482 new_dentry->d_name.len, 1483 &target_insert); 1484 if (status < 0) { 1485 mlog_errno(status); 1486 goto bail; 1487 } 1488 } 1489 1490 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1491 if (IS_ERR(handle)) { 1492 status = PTR_ERR(handle); 1493 handle = NULL; 1494 mlog_errno(status); 1495 goto bail; 1496 } 1497 1498 if (target_exists) { 1499 if (S_ISDIR(new_inode->i_mode)) { 1500 if (new_inode->i_nlink != 2 || 1501 !ocfs2_empty_dir(new_inode)) { 1502 status = -ENOTEMPTY; 1503 goto bail; 1504 } 1505 } 1506 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1507 newfe_bh, 1508 OCFS2_JOURNAL_ACCESS_WRITE); 1509 if (status < 0) { 1510 mlog_errno(status); 1511 goto bail; 1512 } 1513 1514 /* change the dirent to point to the correct inode */ 1515 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1516 old_inode); 1517 if (status < 0) { 1518 mlog_errno(status); 1519 goto bail; 1520 } 1521 inode_inc_iversion(new_dir); 1522 1523 if (S_ISDIR(new_inode->i_mode)) 1524 ocfs2_set_links_count(newfe, 0); 1525 else 1526 ocfs2_add_links_count(newfe, -1); 1527 ocfs2_journal_dirty(handle, newfe_bh); 1528 if (should_add_orphan) { 1529 status = ocfs2_orphan_add(osb, handle, new_inode, 1530 newfe_bh, orphan_name, 1531 &orphan_insert, orphan_dir, false); 1532 if (status < 0) { 1533 mlog_errno(status); 1534 goto bail; 1535 } 1536 } 1537 } else { 1538 /* if the name was not found in new_dir, add it now */ 1539 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1540 OCFS2_I(old_inode)->ip_blkno, 1541 new_dir_bh, &target_insert); 1542 if (status < 0) { 1543 mlog_errno(status); 1544 goto bail; 1545 } 1546 } 1547 1548 inode_set_ctime_current(old_inode); 1549 mark_inode_dirty(old_inode); 1550 1551 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1552 old_inode_bh, 1553 OCFS2_JOURNAL_ACCESS_WRITE); 1554 if (status >= 0) { 1555 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1556 1557 old_di->i_ctime = cpu_to_le64(inode_get_ctime_sec(old_inode)); 1558 old_di->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(old_inode)); 1559 ocfs2_journal_dirty(handle, old_inode_bh); 1560 } else 1561 mlog_errno(status); 1562 1563 /* 1564 * Now that the name has been added to new_dir, remove the old name. 1565 * 1566 * We don't keep any directory entry context around until now 1567 * because the insert might have changed the type of directory 1568 * we're dealing with. 1569 */ 1570 status = ocfs2_find_entry(old_dentry->d_name.name, 1571 old_dentry->d_name.len, old_dir, 1572 &old_entry_lookup); 1573 if (status) { 1574 if (!is_journal_aborted(osb->journal->j_journal)) { 1575 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1576 "is not deleted.", 1577 new_dentry->d_name.len, new_dentry->d_name.name, 1578 old_dentry->d_name.len, old_dentry->d_name.name); 1579 } 1580 goto bail; 1581 } 1582 1583 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1584 if (status < 0) { 1585 mlog_errno(status); 1586 if (!is_journal_aborted(osb->journal->j_journal)) { 1587 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1588 "is not deleted.", 1589 new_dentry->d_name.len, new_dentry->d_name.name, 1590 old_dentry->d_name.len, old_dentry->d_name.name); 1591 } 1592 goto bail; 1593 } 1594 1595 if (new_inode) { 1596 drop_nlink(new_inode); 1597 inode_set_ctime_current(new_inode); 1598 } 1599 inode_set_mtime_to_ts(old_dir, inode_set_ctime_current(old_dir)); 1600 1601 if (update_dot_dot) { 1602 status = ocfs2_update_entry(old_inode, handle, 1603 &old_inode_dot_dot_res, new_dir); 1604 drop_nlink(old_dir); 1605 if (new_inode) { 1606 drop_nlink(new_inode); 1607 } else { 1608 inc_nlink(new_dir); 1609 mark_inode_dirty(new_dir); 1610 } 1611 } 1612 mark_inode_dirty(old_dir); 1613 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1614 if (new_inode) { 1615 mark_inode_dirty(new_inode); 1616 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1617 } 1618 1619 if (old_dir != new_dir) { 1620 /* Keep the same times on both directories.*/ 1621 inode_set_mtime_to_ts(new_dir, 1622 inode_set_ctime_to_ts(new_dir, inode_get_ctime(old_dir))); 1623 1624 /* 1625 * This will also pick up the i_nlink change from the 1626 * block above. 1627 */ 1628 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1629 } 1630 1631 if (old_dir_nlink != old_dir->i_nlink) { 1632 if (!old_dir_bh) { 1633 mlog(ML_ERROR, "need to change nlink for old dir " 1634 "%llu from %d to %d but bh is NULL!\n", 1635 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1636 (int)old_dir_nlink, old_dir->i_nlink); 1637 } else { 1638 struct ocfs2_dinode *fe; 1639 status = ocfs2_journal_access_di(handle, 1640 INODE_CACHE(old_dir), 1641 old_dir_bh, 1642 OCFS2_JOURNAL_ACCESS_WRITE); 1643 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1644 ocfs2_set_links_count(fe, old_dir->i_nlink); 1645 ocfs2_journal_dirty(handle, old_dir_bh); 1646 } 1647 } 1648 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1649 status = 0; 1650 bail: 1651 if (handle) 1652 ocfs2_commit_trans(osb, handle); 1653 1654 if (orphan_dir) { 1655 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1656 ocfs2_inode_unlock(orphan_dir, 1); 1657 inode_unlock(orphan_dir); 1658 iput(orphan_dir); 1659 } 1660 1661 if (new_child_locked) 1662 ocfs2_inode_unlock(new_inode, 1); 1663 1664 if (old_child_locked) 1665 ocfs2_inode_unlock(old_inode, 1); 1666 1667 if (parents_locked) 1668 ocfs2_double_unlock(old_dir, new_dir); 1669 1670 if (rename_lock) 1671 ocfs2_rename_unlock(osb); 1672 1673 if (new_inode) 1674 sync_mapping_buffers(old_inode->i_mapping); 1675 1676 iput(new_inode); 1677 1678 ocfs2_free_dir_lookup_result(&target_lookup_res); 1679 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1680 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1681 ocfs2_free_dir_lookup_result(&orphan_insert); 1682 ocfs2_free_dir_lookup_result(&target_insert); 1683 1684 brelse(newfe_bh); 1685 brelse(old_inode_bh); 1686 brelse(old_dir_bh); 1687 brelse(new_dir_bh); 1688 1689 if (status) 1690 mlog_errno(status); 1691 1692 return status; 1693 } 1694 1695 /* 1696 * we expect i_size = strlen(symname). Copy symname into the file 1697 * data, including the null terminator. 1698 */ 1699 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1700 handle_t *handle, 1701 struct inode *inode, 1702 const char *symname) 1703 { 1704 struct buffer_head **bhs = NULL; 1705 const char *c; 1706 struct super_block *sb = osb->sb; 1707 u64 p_blkno, p_blocks; 1708 int virtual, blocks, status, i, bytes_left; 1709 1710 bytes_left = i_size_read(inode) + 1; 1711 /* we can't trust i_blocks because we're actually going to 1712 * write i_size + 1 bytes. */ 1713 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1714 1715 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, 1716 i_size_read(inode), blocks); 1717 1718 /* Sanity check -- make sure we're going to fit. */ 1719 if (bytes_left > 1720 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1721 status = -EIO; 1722 mlog_errno(status); 1723 goto bail; 1724 } 1725 1726 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1727 if (!bhs) { 1728 status = -ENOMEM; 1729 mlog_errno(status); 1730 goto bail; 1731 } 1732 1733 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1734 NULL); 1735 if (status < 0) { 1736 mlog_errno(status); 1737 goto bail; 1738 } 1739 1740 /* links can never be larger than one cluster so we know this 1741 * is all going to be contiguous, but do a sanity check 1742 * anyway. */ 1743 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1744 status = -EIO; 1745 mlog_errno(status); 1746 goto bail; 1747 } 1748 1749 virtual = 0; 1750 while(bytes_left > 0) { 1751 c = &symname[virtual * sb->s_blocksize]; 1752 1753 bhs[virtual] = sb_getblk(sb, p_blkno); 1754 if (!bhs[virtual]) { 1755 status = -ENOMEM; 1756 mlog_errno(status); 1757 goto bail; 1758 } 1759 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1760 bhs[virtual]); 1761 1762 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1763 bhs[virtual], 1764 OCFS2_JOURNAL_ACCESS_CREATE); 1765 if (status < 0) { 1766 mlog_errno(status); 1767 goto bail; 1768 } 1769 1770 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1771 1772 memcpy(bhs[virtual]->b_data, c, 1773 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1774 bytes_left); 1775 1776 ocfs2_journal_dirty(handle, bhs[virtual]); 1777 1778 virtual++; 1779 p_blkno++; 1780 bytes_left -= sb->s_blocksize; 1781 } 1782 1783 status = 0; 1784 bail: 1785 1786 if (bhs) { 1787 for(i = 0; i < blocks; i++) 1788 brelse(bhs[i]); 1789 kfree(bhs); 1790 } 1791 1792 if (status) 1793 mlog_errno(status); 1794 return status; 1795 } 1796 1797 static int ocfs2_symlink(struct mnt_idmap *idmap, 1798 struct inode *dir, 1799 struct dentry *dentry, 1800 const char *symname) 1801 { 1802 int status, l, credits; 1803 u64 newsize; 1804 struct ocfs2_super *osb = NULL; 1805 struct inode *inode = NULL; 1806 struct super_block *sb; 1807 struct buffer_head *new_fe_bh = NULL; 1808 struct buffer_head *parent_fe_bh = NULL; 1809 struct ocfs2_dinode *fe = NULL; 1810 struct ocfs2_dinode *dirfe; 1811 handle_t *handle = NULL; 1812 struct ocfs2_alloc_context *inode_ac = NULL; 1813 struct ocfs2_alloc_context *data_ac = NULL; 1814 struct ocfs2_alloc_context *xattr_ac = NULL; 1815 int want_clusters = 0; 1816 int xattr_credits = 0; 1817 struct ocfs2_security_xattr_info si = { 1818 .name = NULL, 1819 .enable = 1, 1820 }; 1821 int did_quota = 0, did_quota_inode = 0; 1822 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1823 sigset_t oldset; 1824 int did_block_signals = 0; 1825 struct ocfs2_dentry_lock *dl = NULL; 1826 1827 trace_ocfs2_symlink_begin(dir, dentry, symname, 1828 dentry->d_name.len, dentry->d_name.name); 1829 1830 status = dquot_initialize(dir); 1831 if (status) { 1832 mlog_errno(status); 1833 goto bail; 1834 } 1835 1836 sb = dir->i_sb; 1837 osb = OCFS2_SB(sb); 1838 1839 l = strlen(symname) + 1; 1840 1841 credits = ocfs2_calc_symlink_credits(sb); 1842 1843 /* lock the parent directory */ 1844 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1845 if (status < 0) { 1846 if (status != -ENOENT) 1847 mlog_errno(status); 1848 return status; 1849 } 1850 1851 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1852 if (!ocfs2_read_links_count(dirfe)) { 1853 /* can't make a file in a deleted directory. */ 1854 status = -ENOENT; 1855 goto bail; 1856 } 1857 1858 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1859 dentry->d_name.len); 1860 if (status) 1861 goto bail; 1862 1863 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1864 dentry->d_name.name, 1865 dentry->d_name.len, &lookup); 1866 if (status < 0) { 1867 mlog_errno(status); 1868 goto bail; 1869 } 1870 1871 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1872 if (status < 0) { 1873 if (status != -ENOSPC) 1874 mlog_errno(status); 1875 goto bail; 1876 } 1877 1878 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1879 if (IS_ERR(inode)) { 1880 status = PTR_ERR(inode); 1881 inode = NULL; 1882 mlog_errno(status); 1883 goto bail; 1884 } 1885 1886 /* get security xattr */ 1887 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1888 if (status) { 1889 if (status == -EOPNOTSUPP) 1890 si.enable = 0; 1891 else { 1892 mlog_errno(status); 1893 goto bail; 1894 } 1895 } 1896 1897 /* calculate meta data/clusters for setting security xattr */ 1898 if (si.enable) { 1899 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1900 &xattr_credits, &xattr_ac); 1901 if (status < 0) { 1902 mlog_errno(status); 1903 goto bail; 1904 } 1905 } 1906 1907 /* don't reserve bitmap space for fast symlinks. */ 1908 if (l > ocfs2_fast_symlink_chars(sb)) 1909 want_clusters += 1; 1910 1911 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1912 if (status < 0) { 1913 if (status != -ENOSPC) 1914 mlog_errno(status); 1915 goto bail; 1916 } 1917 1918 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1919 if (IS_ERR(handle)) { 1920 status = PTR_ERR(handle); 1921 handle = NULL; 1922 mlog_errno(status); 1923 goto bail; 1924 } 1925 1926 /* Starting to change things, restart is no longer possible. */ 1927 ocfs2_block_signals(&oldset); 1928 did_block_signals = 1; 1929 1930 status = dquot_alloc_inode(inode); 1931 if (status) 1932 goto bail; 1933 did_quota_inode = 1; 1934 1935 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1936 dentry->d_name.name, 1937 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1938 inode->i_mode); 1939 1940 status = ocfs2_mknod_locked(osb, dir, inode, 1941 0, &new_fe_bh, parent_fe_bh, handle, 1942 inode_ac); 1943 if (status < 0) { 1944 mlog_errno(status); 1945 goto bail; 1946 } 1947 1948 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1949 inode->i_rdev = 0; 1950 newsize = l - 1; 1951 inode->i_op = &ocfs2_symlink_inode_operations; 1952 inode_nohighmem(inode); 1953 if (l > ocfs2_fast_symlink_chars(sb)) { 1954 u32 offset = 0; 1955 1956 status = dquot_alloc_space_nodirty(inode, 1957 ocfs2_clusters_to_bytes(osb->sb, 1)); 1958 if (status) 1959 goto bail; 1960 did_quota = 1; 1961 inode->i_mapping->a_ops = &ocfs2_aops; 1962 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1963 new_fe_bh, 1964 handle, data_ac, NULL, 1965 NULL); 1966 if (status < 0) { 1967 if (status != -ENOSPC && status != -EINTR) { 1968 mlog(ML_ERROR, 1969 "Failed to extend file to %llu\n", 1970 (unsigned long long)newsize); 1971 mlog_errno(status); 1972 status = -ENOSPC; 1973 } 1974 goto bail; 1975 } 1976 i_size_write(inode, newsize); 1977 inode->i_blocks = ocfs2_inode_sector_count(inode); 1978 } else { 1979 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1980 memcpy((char *) fe->id2.i_symlink, symname, l); 1981 i_size_write(inode, newsize); 1982 inode->i_blocks = 0; 1983 } 1984 1985 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1986 if (status < 0) { 1987 mlog_errno(status); 1988 goto bail; 1989 } 1990 1991 if (!ocfs2_inode_is_fast_symlink(inode)) { 1992 status = ocfs2_create_symlink_data(osb, handle, inode, 1993 symname); 1994 if (status < 0) { 1995 mlog_errno(status); 1996 goto bail; 1997 } 1998 } 1999 2000 if (si.enable) { 2001 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 2002 xattr_ac, data_ac); 2003 if (status < 0) { 2004 mlog_errno(status); 2005 goto bail; 2006 } 2007 } 2008 2009 /* 2010 * Do this before adding the entry to the directory. We add 2011 * also set d_op after success so that ->d_iput() will cleanup 2012 * the dentry lock even if ocfs2_add_entry() fails below. 2013 */ 2014 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 2015 if (status) { 2016 mlog_errno(status); 2017 goto bail; 2018 } 2019 2020 dl = dentry->d_fsdata; 2021 2022 status = ocfs2_add_entry(handle, dentry, inode, 2023 le64_to_cpu(fe->i_blkno), parent_fe_bh, 2024 &lookup); 2025 if (status < 0) { 2026 mlog_errno(status); 2027 goto bail; 2028 } 2029 2030 insert_inode_hash(inode); 2031 d_instantiate(dentry, inode); 2032 bail: 2033 if (status < 0 && did_quota) 2034 dquot_free_space_nodirty(inode, 2035 ocfs2_clusters_to_bytes(osb->sb, 1)); 2036 if (status < 0 && did_quota_inode) 2037 dquot_free_inode(inode); 2038 if (handle) { 2039 if (status < 0 && fe) 2040 ocfs2_set_links_count(fe, 0); 2041 ocfs2_commit_trans(osb, handle); 2042 } 2043 2044 ocfs2_inode_unlock(dir, 1); 2045 if (did_block_signals) 2046 ocfs2_unblock_signals(&oldset); 2047 2048 brelse(new_fe_bh); 2049 brelse(parent_fe_bh); 2050 kfree(si.value); 2051 ocfs2_free_dir_lookup_result(&lookup); 2052 if (inode_ac) 2053 ocfs2_free_alloc_context(inode_ac); 2054 if (data_ac) 2055 ocfs2_free_alloc_context(data_ac); 2056 if (xattr_ac) 2057 ocfs2_free_alloc_context(xattr_ac); 2058 if ((status < 0) && inode) { 2059 if (dl) 2060 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 2061 2062 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 2063 clear_nlink(inode); 2064 iput(inode); 2065 } 2066 2067 if (status) 2068 mlog_errno(status); 2069 2070 return status; 2071 } 2072 2073 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2074 { 2075 int status, namelen; 2076 2077 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2078 (long long)blkno); 2079 if (namelen <= 0) { 2080 if (namelen) 2081 status = namelen; 2082 else 2083 status = -EINVAL; 2084 mlog_errno(status); 2085 goto bail; 2086 } 2087 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2088 status = -EINVAL; 2089 mlog_errno(status); 2090 goto bail; 2091 } 2092 2093 trace_ocfs2_blkno_stringify(blkno, name, namelen); 2094 2095 status = 0; 2096 bail: 2097 if (status < 0) 2098 mlog_errno(status); 2099 return status; 2100 } 2101 2102 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, 2103 struct inode **ret_orphan_dir, 2104 struct buffer_head **ret_orphan_dir_bh) 2105 { 2106 struct inode *orphan_dir_inode; 2107 struct buffer_head *orphan_dir_bh = NULL; 2108 int ret = 0; 2109 2110 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2111 ORPHAN_DIR_SYSTEM_INODE, 2112 osb->slot_num); 2113 if (!orphan_dir_inode) { 2114 ret = -ENOENT; 2115 mlog_errno(ret); 2116 return ret; 2117 } 2118 2119 inode_lock(orphan_dir_inode); 2120 2121 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2122 if (ret < 0) { 2123 inode_unlock(orphan_dir_inode); 2124 iput(orphan_dir_inode); 2125 2126 mlog_errno(ret); 2127 return ret; 2128 } 2129 2130 *ret_orphan_dir = orphan_dir_inode; 2131 *ret_orphan_dir_bh = orphan_dir_bh; 2132 2133 return 0; 2134 } 2135 2136 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, 2137 struct buffer_head *orphan_dir_bh, 2138 u64 blkno, 2139 char *name, 2140 struct ocfs2_dir_lookup_result *lookup, 2141 bool dio) 2142 { 2143 int ret; 2144 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); 2145 int namelen = dio ? 2146 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2147 OCFS2_ORPHAN_NAMELEN; 2148 2149 if (dio) { 2150 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2151 OCFS2_DIO_ORPHAN_PREFIX); 2152 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2153 ret = -EINVAL; 2154 mlog_errno(ret); 2155 return ret; 2156 } 2157 2158 ret = ocfs2_blkno_stringify(blkno, 2159 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2160 } else 2161 ret = ocfs2_blkno_stringify(blkno, name); 2162 if (ret < 0) { 2163 mlog_errno(ret); 2164 return ret; 2165 } 2166 2167 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2168 orphan_dir_bh, name, 2169 namelen, lookup); 2170 if (ret < 0) { 2171 mlog_errno(ret); 2172 return ret; 2173 } 2174 2175 return 0; 2176 } 2177 2178 /** 2179 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for 2180 * insertion of an orphan. 2181 * @osb: ocfs2 file system 2182 * @ret_orphan_dir: Orphan dir inode - returned locked! 2183 * @blkno: Actual block number of the inode to be inserted into orphan dir. 2184 * @lookup: dir lookup result, to be passed back into functions like 2185 * ocfs2_orphan_add 2186 * 2187 * Returns zero on success and the ret_orphan_dir, name and lookup 2188 * fields will be populated. 2189 * 2190 * Returns non-zero on failure. 2191 */ 2192 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2193 struct inode **ret_orphan_dir, 2194 u64 blkno, 2195 char *name, 2196 struct ocfs2_dir_lookup_result *lookup, 2197 bool dio) 2198 { 2199 struct inode *orphan_dir_inode = NULL; 2200 struct buffer_head *orphan_dir_bh = NULL; 2201 int ret = 0; 2202 2203 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, 2204 &orphan_dir_bh); 2205 if (ret < 0) { 2206 mlog_errno(ret); 2207 return ret; 2208 } 2209 2210 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, 2211 blkno, name, lookup, dio); 2212 if (ret < 0) { 2213 mlog_errno(ret); 2214 goto out; 2215 } 2216 2217 *ret_orphan_dir = orphan_dir_inode; 2218 2219 out: 2220 brelse(orphan_dir_bh); 2221 2222 if (ret) { 2223 ocfs2_inode_unlock(orphan_dir_inode, 1); 2224 inode_unlock(orphan_dir_inode); 2225 iput(orphan_dir_inode); 2226 } 2227 2228 if (ret) 2229 mlog_errno(ret); 2230 return ret; 2231 } 2232 2233 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2234 handle_t *handle, 2235 struct inode *inode, 2236 struct buffer_head *fe_bh, 2237 char *name, 2238 struct ocfs2_dir_lookup_result *lookup, 2239 struct inode *orphan_dir_inode, 2240 bool dio) 2241 { 2242 struct buffer_head *orphan_dir_bh = NULL; 2243 int status = 0; 2244 struct ocfs2_dinode *orphan_fe; 2245 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 2246 int namelen = dio ? 2247 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2248 OCFS2_ORPHAN_NAMELEN; 2249 2250 trace_ocfs2_orphan_add_begin( 2251 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2252 2253 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 2254 if (status < 0) { 2255 mlog_errno(status); 2256 goto leave; 2257 } 2258 2259 status = ocfs2_journal_access_di(handle, 2260 INODE_CACHE(orphan_dir_inode), 2261 orphan_dir_bh, 2262 OCFS2_JOURNAL_ACCESS_WRITE); 2263 if (status < 0) { 2264 mlog_errno(status); 2265 goto leave; 2266 } 2267 2268 /* 2269 * We're going to journal the change of i_flags and i_orphaned_slot. 2270 * It's safe anyway, though some callers may duplicate the journaling. 2271 * Journaling within the func just make the logic look more 2272 * straightforward. 2273 */ 2274 status = ocfs2_journal_access_di(handle, 2275 INODE_CACHE(inode), 2276 fe_bh, 2277 OCFS2_JOURNAL_ACCESS_WRITE); 2278 if (status < 0) { 2279 mlog_errno(status); 2280 goto leave; 2281 } 2282 2283 /* we're a cluster, and nlink can change on disk from 2284 * underneath us... */ 2285 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2286 if (S_ISDIR(inode->i_mode)) 2287 ocfs2_add_links_count(orphan_fe, 1); 2288 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2289 ocfs2_journal_dirty(handle, orphan_dir_bh); 2290 2291 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2292 namelen, inode, 2293 OCFS2_I(inode)->ip_blkno, 2294 orphan_dir_bh, lookup); 2295 if (status < 0) { 2296 mlog_errno(status); 2297 goto rollback; 2298 } 2299 2300 if (dio) { 2301 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan 2302 * slot. 2303 */ 2304 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2305 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); 2306 } else { 2307 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL); 2308 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; 2309 2310 /* Record which orphan dir our inode now resides 2311 * in. delete_inode will use this to determine which orphan 2312 * dir to lock. */ 2313 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2314 } 2315 2316 ocfs2_journal_dirty(handle, fe_bh); 2317 2318 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, 2319 osb->slot_num); 2320 2321 rollback: 2322 if (status < 0) { 2323 if (S_ISDIR(inode->i_mode)) 2324 ocfs2_add_links_count(orphan_fe, -1); 2325 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2326 } 2327 2328 leave: 2329 brelse(orphan_dir_bh); 2330 2331 return status; 2332 } 2333 2334 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2335 int ocfs2_orphan_del(struct ocfs2_super *osb, 2336 handle_t *handle, 2337 struct inode *orphan_dir_inode, 2338 struct inode *inode, 2339 struct buffer_head *orphan_dir_bh, 2340 bool dio) 2341 { 2342 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2343 struct ocfs2_dinode *orphan_fe; 2344 int status = 0; 2345 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2346 2347 if (dio) { 2348 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2349 OCFS2_DIO_ORPHAN_PREFIX); 2350 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2351 status = -EINVAL; 2352 mlog_errno(status); 2353 return status; 2354 } 2355 2356 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, 2357 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2358 } else 2359 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2360 if (status < 0) { 2361 mlog_errno(status); 2362 goto leave; 2363 } 2364 2365 trace_ocfs2_orphan_del( 2366 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2367 name, strlen(name)); 2368 2369 status = ocfs2_journal_access_di(handle, 2370 INODE_CACHE(orphan_dir_inode), 2371 orphan_dir_bh, 2372 OCFS2_JOURNAL_ACCESS_WRITE); 2373 if (status < 0) { 2374 mlog_errno(status); 2375 goto leave; 2376 } 2377 2378 /* find it's spot in the orphan directory */ 2379 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode, 2380 &lookup); 2381 if (status) { 2382 mlog_errno(status); 2383 goto leave; 2384 } 2385 2386 /* remove it from the orphan directory */ 2387 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); 2388 if (status < 0) { 2389 mlog_errno(status); 2390 goto leave; 2391 } 2392 2393 /* do the i_nlink dance! :) */ 2394 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2395 if (S_ISDIR(inode->i_mode)) 2396 ocfs2_add_links_count(orphan_fe, -1); 2397 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2398 ocfs2_journal_dirty(handle, orphan_dir_bh); 2399 2400 leave: 2401 ocfs2_free_dir_lookup_result(&lookup); 2402 2403 if (status) 2404 mlog_errno(status); 2405 return status; 2406 } 2407 2408 /** 2409 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly 2410 * allocated file. This is different from the typical 'add to orphan dir' 2411 * operation in that the inode does not yet exist. This is a problem because 2412 * the orphan dir stringifies the inode block number to come up with it's 2413 * dirent. Obviously if the inode does not yet exist we have a chicken and egg 2414 * problem. This function works around it by calling deeper into the orphan 2415 * and suballoc code than other callers. Use this only by necessity. 2416 * @dir: The directory which this inode will ultimately wind up under - not the 2417 * orphan dir! 2418 * @dir_bh: buffer_head the @dir inode block 2419 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled 2420 * with the string to be used for orphan dirent. Pass back to the orphan dir 2421 * code. 2422 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan 2423 * dir code. 2424 * @ret_di_blkno: block number where the new inode will be allocated. 2425 * @orphan_insert: Dir insert context to be passed back into orphan dir code. 2426 * @ret_inode_ac: Inode alloc context to be passed back to the allocator. 2427 * 2428 * Returns zero on success and the ret_orphan_dir, name and lookup 2429 * fields will be populated. 2430 * 2431 * Returns non-zero on failure. 2432 */ 2433 static int ocfs2_prep_new_orphaned_file(struct inode *dir, 2434 struct buffer_head *dir_bh, 2435 char *orphan_name, 2436 struct inode **ret_orphan_dir, 2437 u64 *ret_di_blkno, 2438 struct ocfs2_dir_lookup_result *orphan_insert, 2439 struct ocfs2_alloc_context **ret_inode_ac) 2440 { 2441 int ret; 2442 u64 di_blkno; 2443 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2444 struct inode *orphan_dir = NULL; 2445 struct buffer_head *orphan_dir_bh = NULL; 2446 struct ocfs2_alloc_context *inode_ac = NULL; 2447 2448 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); 2449 if (ret < 0) { 2450 mlog_errno(ret); 2451 return ret; 2452 } 2453 2454 /* reserve an inode spot */ 2455 ret = ocfs2_reserve_new_inode(osb, &inode_ac); 2456 if (ret < 0) { 2457 if (ret != -ENOSPC) 2458 mlog_errno(ret); 2459 goto out; 2460 } 2461 2462 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, 2463 &di_blkno); 2464 if (ret) { 2465 mlog_errno(ret); 2466 goto out; 2467 } 2468 2469 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, 2470 di_blkno, orphan_name, orphan_insert, 2471 false); 2472 if (ret < 0) { 2473 mlog_errno(ret); 2474 goto out; 2475 } 2476 2477 out: 2478 if (ret == 0) { 2479 *ret_orphan_dir = orphan_dir; 2480 *ret_di_blkno = di_blkno; 2481 *ret_inode_ac = inode_ac; 2482 /* 2483 * orphan_name and orphan_insert are already up to 2484 * date via prepare_orphan_dir 2485 */ 2486 } else { 2487 /* Unroll reserve_new_inode* */ 2488 if (inode_ac) 2489 ocfs2_free_alloc_context(inode_ac); 2490 2491 /* Unroll orphan dir locking */ 2492 inode_unlock(orphan_dir); 2493 ocfs2_inode_unlock(orphan_dir, 1); 2494 iput(orphan_dir); 2495 } 2496 2497 brelse(orphan_dir_bh); 2498 2499 return ret; 2500 } 2501 2502 int ocfs2_create_inode_in_orphan(struct inode *dir, 2503 int mode, 2504 struct inode **new_inode) 2505 { 2506 int status, did_quota_inode = 0; 2507 struct inode *inode = NULL; 2508 struct inode *orphan_dir = NULL; 2509 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2510 handle_t *handle = NULL; 2511 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2512 struct buffer_head *parent_di_bh = NULL; 2513 struct buffer_head *new_di_bh = NULL; 2514 struct ocfs2_alloc_context *inode_ac = NULL; 2515 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2516 u64 di_blkno, suballoc_loc; 2517 u16 suballoc_bit; 2518 2519 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2520 if (status < 0) { 2521 if (status != -ENOENT) 2522 mlog_errno(status); 2523 return status; 2524 } 2525 2526 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, 2527 orphan_name, &orphan_dir, 2528 &di_blkno, &orphan_insert, &inode_ac); 2529 if (status < 0) { 2530 if (status != -ENOSPC) 2531 mlog_errno(status); 2532 goto leave; 2533 } 2534 2535 inode = ocfs2_get_init_inode(dir, mode); 2536 if (IS_ERR(inode)) { 2537 status = PTR_ERR(inode); 2538 inode = NULL; 2539 mlog_errno(status); 2540 goto leave; 2541 } 2542 2543 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2544 if (IS_ERR(handle)) { 2545 status = PTR_ERR(handle); 2546 handle = NULL; 2547 mlog_errno(status); 2548 goto leave; 2549 } 2550 2551 status = dquot_alloc_inode(inode); 2552 if (status) 2553 goto leave; 2554 did_quota_inode = 1; 2555 2556 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, 2557 &suballoc_loc, 2558 &suballoc_bit, di_blkno); 2559 if (status < 0) { 2560 mlog_errno(status); 2561 goto leave; 2562 } 2563 2564 clear_nlink(inode); 2565 /* do the real work now. */ 2566 status = __ocfs2_mknod_locked(dir, inode, 2567 0, &new_di_bh, parent_di_bh, handle, 2568 inode_ac, di_blkno, suballoc_loc, 2569 suballoc_bit); 2570 if (status < 0) { 2571 mlog_errno(status); 2572 goto leave; 2573 } 2574 2575 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, 2576 &orphan_insert, orphan_dir, false); 2577 if (status < 0) { 2578 mlog_errno(status); 2579 goto leave; 2580 } 2581 2582 /* get open lock so that only nodes can't remove it from orphan dir. */ 2583 status = ocfs2_open_lock(inode); 2584 if (status < 0) 2585 mlog_errno(status); 2586 2587 insert_inode_hash(inode); 2588 leave: 2589 if (status < 0 && did_quota_inode) 2590 dquot_free_inode(inode); 2591 if (handle) 2592 ocfs2_commit_trans(osb, handle); 2593 2594 if (orphan_dir) { 2595 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2596 ocfs2_inode_unlock(orphan_dir, 1); 2597 inode_unlock(orphan_dir); 2598 iput(orphan_dir); 2599 } 2600 2601 if ((status < 0) && inode) { 2602 clear_nlink(inode); 2603 iput(inode); 2604 } 2605 2606 if (inode_ac) 2607 ocfs2_free_alloc_context(inode_ac); 2608 2609 brelse(new_di_bh); 2610 2611 if (!status) 2612 *new_inode = inode; 2613 2614 ocfs2_free_dir_lookup_result(&orphan_insert); 2615 2616 ocfs2_inode_unlock(dir, 1); 2617 brelse(parent_di_bh); 2618 return status; 2619 } 2620 2621 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, 2622 struct inode *inode) 2623 { 2624 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2625 struct inode *orphan_dir_inode = NULL; 2626 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2627 struct buffer_head *di_bh = NULL; 2628 int status = 0; 2629 handle_t *handle = NULL; 2630 struct ocfs2_dinode *di = NULL; 2631 2632 status = ocfs2_inode_lock(inode, &di_bh, 1); 2633 if (status < 0) { 2634 mlog_errno(status); 2635 goto bail; 2636 } 2637 2638 di = (struct ocfs2_dinode *) di_bh->b_data; 2639 /* 2640 * Another append dio crashed? 2641 * If so, manually recover it first. 2642 */ 2643 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 2644 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode)); 2645 if (status < 0) { 2646 if (status != -ENOSPC) 2647 mlog_errno(status); 2648 goto bail_unlock_inode; 2649 } 2650 2651 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0); 2652 if (status < 0) { 2653 mlog_errno(status); 2654 goto bail_unlock_inode; 2655 } 2656 } 2657 2658 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, 2659 OCFS2_I(inode)->ip_blkno, 2660 orphan_name, 2661 &orphan_insert, 2662 true); 2663 if (status < 0) { 2664 mlog_errno(status); 2665 goto bail_unlock_inode; 2666 } 2667 2668 handle = ocfs2_start_trans(osb, 2669 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); 2670 if (IS_ERR(handle)) { 2671 status = PTR_ERR(handle); 2672 goto bail_unlock_orphan; 2673 } 2674 2675 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, 2676 &orphan_insert, orphan_dir_inode, true); 2677 if (status) 2678 mlog_errno(status); 2679 2680 ocfs2_commit_trans(osb, handle); 2681 2682 bail_unlock_orphan: 2683 ocfs2_inode_unlock(orphan_dir_inode, 1); 2684 inode_unlock(orphan_dir_inode); 2685 iput(orphan_dir_inode); 2686 2687 ocfs2_free_dir_lookup_result(&orphan_insert); 2688 2689 bail_unlock_inode: 2690 ocfs2_inode_unlock(inode, 1); 2691 brelse(di_bh); 2692 2693 bail: 2694 return status; 2695 } 2696 2697 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, 2698 struct inode *inode, struct buffer_head *di_bh, 2699 int update_isize, loff_t end) 2700 { 2701 struct inode *orphan_dir_inode = NULL; 2702 struct buffer_head *orphan_dir_bh = NULL; 2703 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2704 handle_t *handle = NULL; 2705 int status = 0; 2706 2707 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2708 ORPHAN_DIR_SYSTEM_INODE, 2709 le16_to_cpu(di->i_dio_orphaned_slot)); 2710 if (!orphan_dir_inode) { 2711 status = -ENOENT; 2712 mlog_errno(status); 2713 goto bail; 2714 } 2715 2716 inode_lock(orphan_dir_inode); 2717 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2718 if (status < 0) { 2719 inode_unlock(orphan_dir_inode); 2720 iput(orphan_dir_inode); 2721 mlog_errno(status); 2722 goto bail; 2723 } 2724 2725 handle = ocfs2_start_trans(osb, 2726 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); 2727 if (IS_ERR(handle)) { 2728 status = PTR_ERR(handle); 2729 goto bail_unlock_orphan; 2730 } 2731 2732 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); 2733 2734 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, 2735 inode, orphan_dir_bh, true); 2736 if (status < 0) { 2737 mlog_errno(status); 2738 goto bail_commit; 2739 } 2740 2741 status = ocfs2_journal_access_di(handle, 2742 INODE_CACHE(inode), 2743 di_bh, 2744 OCFS2_JOURNAL_ACCESS_WRITE); 2745 if (status < 0) { 2746 mlog_errno(status); 2747 goto bail_commit; 2748 } 2749 2750 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2751 di->i_dio_orphaned_slot = 0; 2752 2753 if (update_isize) { 2754 status = ocfs2_set_inode_size(handle, inode, di_bh, end); 2755 if (status) 2756 mlog_errno(status); 2757 } else 2758 ocfs2_journal_dirty(handle, di_bh); 2759 2760 bail_commit: 2761 ocfs2_commit_trans(osb, handle); 2762 2763 bail_unlock_orphan: 2764 ocfs2_inode_unlock(orphan_dir_inode, 1); 2765 inode_unlock(orphan_dir_inode); 2766 brelse(orphan_dir_bh); 2767 iput(orphan_dir_inode); 2768 2769 bail: 2770 return status; 2771 } 2772 2773 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2774 struct inode *inode, 2775 struct dentry *dentry) 2776 { 2777 int status = 0; 2778 struct buffer_head *parent_di_bh = NULL; 2779 handle_t *handle = NULL; 2780 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2781 struct ocfs2_dinode *dir_di, *di; 2782 struct inode *orphan_dir_inode = NULL; 2783 struct buffer_head *orphan_dir_bh = NULL; 2784 struct buffer_head *di_bh = NULL; 2785 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2786 2787 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, 2788 dentry->d_name.len, dentry->d_name.name, 2789 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2790 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2791 2792 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2793 if (status < 0) { 2794 if (status != -ENOENT) 2795 mlog_errno(status); 2796 return status; 2797 } 2798 2799 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2800 if (!dir_di->i_links_count) { 2801 /* can't make a file in a deleted directory. */ 2802 status = -ENOENT; 2803 goto leave; 2804 } 2805 2806 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2807 dentry->d_name.len); 2808 if (status) 2809 goto leave; 2810 2811 /* get a spot inside the dir. */ 2812 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2813 dentry->d_name.name, 2814 dentry->d_name.len, &lookup); 2815 if (status < 0) { 2816 mlog_errno(status); 2817 goto leave; 2818 } 2819 2820 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2821 ORPHAN_DIR_SYSTEM_INODE, 2822 osb->slot_num); 2823 if (!orphan_dir_inode) { 2824 status = -ENOENT; 2825 mlog_errno(status); 2826 goto leave; 2827 } 2828 2829 inode_lock(orphan_dir_inode); 2830 2831 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2832 if (status < 0) { 2833 mlog_errno(status); 2834 inode_unlock(orphan_dir_inode); 2835 iput(orphan_dir_inode); 2836 goto leave; 2837 } 2838 2839 status = ocfs2_read_inode_block(inode, &di_bh); 2840 if (status < 0) { 2841 mlog_errno(status); 2842 goto orphan_unlock; 2843 } 2844 2845 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2846 if (IS_ERR(handle)) { 2847 status = PTR_ERR(handle); 2848 handle = NULL; 2849 mlog_errno(status); 2850 goto orphan_unlock; 2851 } 2852 2853 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2854 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2855 if (status < 0) { 2856 mlog_errno(status); 2857 goto out_commit; 2858 } 2859 2860 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2861 orphan_dir_bh, false); 2862 if (status < 0) { 2863 mlog_errno(status); 2864 goto out_commit; 2865 } 2866 2867 di = (struct ocfs2_dinode *)di_bh->b_data; 2868 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); 2869 di->i_orphaned_slot = 0; 2870 set_nlink(inode, 1); 2871 ocfs2_set_links_count(di, inode->i_nlink); 2872 ocfs2_update_inode_fsync_trans(handle, inode, 1); 2873 ocfs2_journal_dirty(handle, di_bh); 2874 2875 status = ocfs2_add_entry(handle, dentry, inode, 2876 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2877 &lookup); 2878 if (status < 0) { 2879 mlog_errno(status); 2880 goto out_commit; 2881 } 2882 2883 status = ocfs2_dentry_attach_lock(dentry, inode, 2884 OCFS2_I(dir)->ip_blkno); 2885 if (status) { 2886 mlog_errno(status); 2887 goto out_commit; 2888 } 2889 2890 d_instantiate(dentry, inode); 2891 status = 0; 2892 out_commit: 2893 ocfs2_commit_trans(osb, handle); 2894 orphan_unlock: 2895 ocfs2_inode_unlock(orphan_dir_inode, 1); 2896 inode_unlock(orphan_dir_inode); 2897 iput(orphan_dir_inode); 2898 leave: 2899 2900 ocfs2_inode_unlock(dir, 1); 2901 2902 brelse(di_bh); 2903 brelse(parent_di_bh); 2904 brelse(orphan_dir_bh); 2905 2906 ocfs2_free_dir_lookup_result(&lookup); 2907 2908 if (status) 2909 mlog_errno(status); 2910 2911 return status; 2912 } 2913 2914 const struct inode_operations ocfs2_dir_iops = { 2915 .create = ocfs2_create, 2916 .lookup = ocfs2_lookup, 2917 .link = ocfs2_link, 2918 .unlink = ocfs2_unlink, 2919 .rmdir = ocfs2_unlink, 2920 .symlink = ocfs2_symlink, 2921 .mkdir = ocfs2_mkdir, 2922 .mknod = ocfs2_mknod, 2923 .rename = ocfs2_rename, 2924 .setattr = ocfs2_setattr, 2925 .getattr = ocfs2_getattr, 2926 .permission = ocfs2_permission, 2927 .listxattr = ocfs2_listxattr, 2928 .fiemap = ocfs2_fiemap, 2929 .get_inode_acl = ocfs2_iop_get_acl, 2930 .set_acl = ocfs2_iop_set_acl, 2931 .fileattr_get = ocfs2_fileattr_get, 2932 .fileattr_set = ocfs2_fileattr_set, 2933 }; 2934