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 handle_t *handle, 512 struct ocfs2_alloc_context *inode_ac, 513 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit) 514 { 515 int status = 0; 516 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 517 struct ocfs2_dinode *fe = NULL; 518 struct ocfs2_extent_list *fel; 519 u16 feat; 520 struct ocfs2_inode_info *oi = OCFS2_I(inode); 521 struct timespec64 ts; 522 523 *new_fe_bh = NULL; 524 525 /* populate as many fields early on as possible - many of 526 * these are used by the support functions here and in 527 * callers. */ 528 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 529 oi->ip_blkno = fe_blkno; 530 spin_lock(&osb->osb_lock); 531 inode->i_generation = osb->s_next_generation++; 532 spin_unlock(&osb->osb_lock); 533 534 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 535 if (!*new_fe_bh) { 536 status = -ENOMEM; 537 mlog_errno(status); 538 goto leave; 539 } 540 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh); 541 542 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 543 *new_fe_bh, 544 OCFS2_JOURNAL_ACCESS_CREATE); 545 if (status < 0) { 546 mlog_errno(status); 547 goto leave; 548 } 549 550 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 551 memset(fe, 0, osb->sb->s_blocksize); 552 553 fe->i_generation = cpu_to_le32(inode->i_generation); 554 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 555 fe->i_blkno = cpu_to_le64(fe_blkno); 556 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc); 557 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 558 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); 559 fe->i_uid = cpu_to_le32(i_uid_read(inode)); 560 fe->i_gid = cpu_to_le32(i_gid_read(inode)); 561 fe->i_mode = cpu_to_le16(inode->i_mode); 562 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 563 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 564 565 ocfs2_set_links_count(fe, inode->i_nlink); 566 567 fe->i_last_eb_blk = 0; 568 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 569 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL); 570 ktime_get_coarse_real_ts64(&ts); 571 fe->i_atime = fe->i_ctime = fe->i_mtime = 572 cpu_to_le64(ts.tv_sec); 573 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 574 cpu_to_le32(ts.tv_nsec); 575 fe->i_dtime = 0; 576 577 /* 578 * If supported, directories start with inline data. If inline 579 * isn't supported, but indexing is, we start them as indexed. 580 */ 581 feat = le16_to_cpu(fe->i_dyn_features); 582 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) { 583 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); 584 585 fe->id2.i_data.id_count = cpu_to_le16( 586 ocfs2_max_inline_data_with_xattr(osb->sb, fe)); 587 } else { 588 fel = &fe->id2.i_list; 589 fel->l_tree_depth = 0; 590 fel->l_next_free_rec = 0; 591 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 592 } 593 594 ocfs2_journal_dirty(handle, *new_fe_bh); 595 596 ocfs2_populate_inode(inode, fe, 1); 597 ocfs2_ci_set_new(osb, INODE_CACHE(inode)); 598 if (!ocfs2_mount_local(osb)) { 599 status = ocfs2_create_new_inode_locks(inode); 600 if (status < 0) 601 mlog_errno(status); 602 } 603 604 ocfs2_update_inode_fsync_trans(handle, inode, 1); 605 606 leave: 607 if (status < 0) { 608 if (*new_fe_bh) { 609 brelse(*new_fe_bh); 610 *new_fe_bh = NULL; 611 } 612 } 613 614 if (status) 615 mlog_errno(status); 616 return status; 617 } 618 619 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 620 struct inode *dir, 621 struct inode *inode, 622 dev_t dev, 623 struct buffer_head **new_fe_bh, 624 struct buffer_head *parent_fe_bh, 625 handle_t *handle, 626 struct ocfs2_alloc_context *inode_ac) 627 { 628 int status = 0; 629 u64 suballoc_loc, fe_blkno = 0; 630 u16 suballoc_bit; 631 632 *new_fe_bh = NULL; 633 634 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh, 635 inode_ac, &suballoc_loc, 636 &suballoc_bit, &fe_blkno); 637 if (status < 0) { 638 mlog_errno(status); 639 return status; 640 } 641 642 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, 643 handle, inode_ac, fe_blkno, 644 suballoc_loc, suballoc_bit); 645 } 646 647 static struct dentry *ocfs2_mkdir(struct mnt_idmap *idmap, 648 struct inode *dir, 649 struct dentry *dentry, 650 umode_t mode) 651 { 652 int ret; 653 654 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, 655 OCFS2_I(dir)->ip_blkno, mode); 656 ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFDIR, 0); 657 if (ret) 658 mlog_errno(ret); 659 660 return ERR_PTR(ret); 661 } 662 663 static int ocfs2_create(struct mnt_idmap *idmap, 664 struct inode *dir, 665 struct dentry *dentry, 666 umode_t mode, 667 bool excl) 668 { 669 int ret; 670 671 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name, 672 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode); 673 ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFREG, 0); 674 if (ret) 675 mlog_errno(ret); 676 677 return ret; 678 } 679 680 static int ocfs2_link(struct dentry *old_dentry, 681 struct inode *dir, 682 struct dentry *dentry) 683 { 684 handle_t *handle; 685 struct inode *inode = d_inode(old_dentry); 686 struct inode *old_dir = d_inode(old_dentry->d_parent); 687 int err; 688 struct buffer_head *fe_bh = NULL; 689 struct buffer_head *old_dir_bh = NULL; 690 struct buffer_head *parent_fe_bh = NULL; 691 struct ocfs2_dinode *fe = NULL; 692 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 693 struct ocfs2_dir_lookup_result lookup = { NULL, }; 694 sigset_t oldset; 695 u64 old_de_ino; 696 697 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno, 698 old_dentry->d_name.len, old_dentry->d_name.name, 699 dentry->d_name.len, dentry->d_name.name); 700 701 if (S_ISDIR(inode->i_mode)) 702 return -EPERM; 703 704 err = dquot_initialize(dir); 705 if (err) { 706 mlog_errno(err); 707 return err; 708 } 709 710 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 711 &parent_fe_bh, dir, 0); 712 if (err < 0) { 713 if (err != -ENOENT) 714 mlog_errno(err); 715 return err; 716 } 717 718 /* make sure both dirs have bhs 719 * get an extra ref on old_dir_bh if old==new */ 720 if (!parent_fe_bh) { 721 if (old_dir_bh) { 722 parent_fe_bh = old_dir_bh; 723 get_bh(parent_fe_bh); 724 } else { 725 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str); 726 err = -EIO; 727 goto out; 728 } 729 } 730 731 if (!dir->i_nlink) { 732 err = -ENOENT; 733 goto out; 734 } 735 736 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 737 old_dentry->d_name.len, &old_de_ino); 738 if (err) { 739 err = -ENOENT; 740 goto out; 741 } 742 743 /* 744 * Check whether another node removed the source inode while we 745 * were in the vfs. 746 */ 747 if (old_de_ino != OCFS2_I(inode)->ip_blkno) { 748 err = -ENOENT; 749 goto out; 750 } 751 752 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 753 dentry->d_name.len); 754 if (err) 755 goto out; 756 757 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 758 dentry->d_name.name, 759 dentry->d_name.len, &lookup); 760 if (err < 0) { 761 mlog_errno(err); 762 goto out; 763 } 764 765 err = ocfs2_inode_lock(inode, &fe_bh, 1); 766 if (err < 0) { 767 if (err != -ENOENT) 768 mlog_errno(err); 769 goto out; 770 } 771 772 fe = (struct ocfs2_dinode *) fe_bh->b_data; 773 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { 774 err = -EMLINK; 775 goto out_unlock_inode; 776 } 777 778 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); 779 if (IS_ERR(handle)) { 780 err = PTR_ERR(handle); 781 handle = NULL; 782 mlog_errno(err); 783 goto out_unlock_inode; 784 } 785 786 /* Starting to change things, restart is no longer possible. */ 787 ocfs2_block_signals(&oldset); 788 789 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 790 OCFS2_JOURNAL_ACCESS_WRITE); 791 if (err < 0) { 792 mlog_errno(err); 793 goto out_commit; 794 } 795 796 inc_nlink(inode); 797 inode_set_ctime_current(inode); 798 ocfs2_set_links_count(fe, inode->i_nlink); 799 fe->i_ctime = cpu_to_le64(inode_get_ctime_sec(inode)); 800 fe->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(inode)); 801 ocfs2_update_inode_fsync_trans(handle, inode, 0); 802 ocfs2_journal_dirty(handle, fe_bh); 803 804 err = ocfs2_add_entry(handle, dentry, inode, 805 OCFS2_I(inode)->ip_blkno, 806 parent_fe_bh, &lookup); 807 if (err) { 808 ocfs2_add_links_count(fe, -1); 809 drop_nlink(inode); 810 mlog_errno(err); 811 goto out_commit; 812 } 813 814 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 815 if (err) { 816 mlog_errno(err); 817 goto out_commit; 818 } 819 820 ihold(inode); 821 d_instantiate(dentry, inode); 822 823 out_commit: 824 ocfs2_commit_trans(osb, handle); 825 ocfs2_unblock_signals(&oldset); 826 out_unlock_inode: 827 ocfs2_inode_unlock(inode, 1); 828 829 out: 830 ocfs2_double_unlock(old_dir, dir); 831 832 brelse(fe_bh); 833 brelse(parent_fe_bh); 834 brelse(old_dir_bh); 835 836 ocfs2_free_dir_lookup_result(&lookup); 837 838 if (err) 839 mlog_errno(err); 840 841 return err; 842 } 843 844 /* 845 * Takes and drops an exclusive lock on the given dentry. This will 846 * force other nodes to drop it. 847 */ 848 static int ocfs2_remote_dentry_delete(struct dentry *dentry) 849 { 850 int ret; 851 852 ret = ocfs2_dentry_lock(dentry, 1); 853 if (ret) 854 mlog_errno(ret); 855 else 856 ocfs2_dentry_unlock(dentry, 1); 857 858 return ret; 859 } 860 861 static inline int ocfs2_inode_is_unlinkable(struct inode *inode) 862 { 863 if (S_ISDIR(inode->i_mode)) { 864 if (inode->i_nlink == 2) 865 return 1; 866 return 0; 867 } 868 869 if (inode->i_nlink == 1) 870 return 1; 871 return 0; 872 } 873 874 static int ocfs2_unlink(struct inode *dir, 875 struct dentry *dentry) 876 { 877 int status; 878 int child_locked = 0; 879 bool is_unlinkable = false; 880 struct inode *inode = d_inode(dentry); 881 struct inode *orphan_dir = NULL; 882 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 883 u64 blkno; 884 struct ocfs2_dinode *fe = NULL; 885 struct buffer_head *fe_bh = NULL; 886 struct buffer_head *parent_node_bh = NULL; 887 handle_t *handle = NULL; 888 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 889 struct ocfs2_dir_lookup_result lookup = { NULL, }; 890 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 891 892 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, 893 dentry->d_name.name, 894 (unsigned long long)OCFS2_I(dir)->ip_blkno, 895 (unsigned long long)OCFS2_I(inode)->ip_blkno); 896 897 status = dquot_initialize(dir); 898 if (status) { 899 mlog_errno(status); 900 return status; 901 } 902 903 BUG_ON(d_inode(dentry->d_parent) != dir); 904 905 if (inode == osb->root_inode) 906 return -EPERM; 907 908 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 909 OI_LS_PARENT); 910 if (status < 0) { 911 if (status != -ENOENT) 912 mlog_errno(status); 913 return status; 914 } 915 916 status = ocfs2_find_files_on_disk(dentry->d_name.name, 917 dentry->d_name.len, &blkno, dir, 918 &lookup); 919 if (status < 0) { 920 if (status != -ENOENT) 921 mlog_errno(status); 922 goto leave; 923 } 924 925 if (OCFS2_I(inode)->ip_blkno != blkno) { 926 status = -ENOENT; 927 928 trace_ocfs2_unlink_noent( 929 (unsigned long long)OCFS2_I(inode)->ip_blkno, 930 (unsigned long long)blkno, 931 OCFS2_I(inode)->ip_flags); 932 goto leave; 933 } 934 935 status = ocfs2_inode_lock(inode, &fe_bh, 1); 936 if (status < 0) { 937 if (status != -ENOENT) 938 mlog_errno(status); 939 goto leave; 940 } 941 child_locked = 1; 942 943 if (S_ISDIR(inode->i_mode)) { 944 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 945 status = -ENOTEMPTY; 946 goto leave; 947 } 948 } 949 950 status = ocfs2_remote_dentry_delete(dentry); 951 if (status < 0) { 952 /* This remote delete should succeed under all normal 953 * circumstances. */ 954 mlog_errno(status); 955 goto leave; 956 } 957 958 if (ocfs2_inode_is_unlinkable(inode)) { 959 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 960 OCFS2_I(inode)->ip_blkno, 961 orphan_name, &orphan_insert, 962 false); 963 if (status < 0) { 964 mlog_errno(status); 965 goto leave; 966 } 967 is_unlinkable = true; 968 } 969 970 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 971 if (IS_ERR(handle)) { 972 status = PTR_ERR(handle); 973 handle = NULL; 974 mlog_errno(status); 975 goto leave; 976 } 977 978 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 979 OCFS2_JOURNAL_ACCESS_WRITE); 980 if (status < 0) { 981 mlog_errno(status); 982 goto leave; 983 } 984 985 fe = (struct ocfs2_dinode *) fe_bh->b_data; 986 987 /* delete the name from the parent dir */ 988 status = ocfs2_delete_entry(handle, dir, &lookup); 989 if (status < 0) { 990 mlog_errno(status); 991 goto leave; 992 } 993 994 if (S_ISDIR(inode->i_mode)) 995 drop_nlink(inode); 996 drop_nlink(inode); 997 ocfs2_set_links_count(fe, inode->i_nlink); 998 ocfs2_update_inode_fsync_trans(handle, inode, 0); 999 ocfs2_journal_dirty(handle, fe_bh); 1000 1001 inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); 1002 if (S_ISDIR(inode->i_mode)) 1003 drop_nlink(dir); 1004 1005 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 1006 if (status < 0) { 1007 mlog_errno(status); 1008 if (S_ISDIR(inode->i_mode)) 1009 inc_nlink(dir); 1010 goto leave; 1011 } 1012 1013 if (is_unlinkable) { 1014 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, 1015 orphan_name, &orphan_insert, orphan_dir, false); 1016 if (status < 0) 1017 mlog_errno(status); 1018 } 1019 1020 leave: 1021 if (handle) 1022 ocfs2_commit_trans(osb, handle); 1023 1024 if (orphan_dir) { 1025 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1026 ocfs2_inode_unlock(orphan_dir, 1); 1027 inode_unlock(orphan_dir); 1028 iput(orphan_dir); 1029 } 1030 1031 if (child_locked) 1032 ocfs2_inode_unlock(inode, 1); 1033 1034 ocfs2_inode_unlock(dir, 1); 1035 1036 brelse(fe_bh); 1037 brelse(parent_node_bh); 1038 1039 ocfs2_free_dir_lookup_result(&orphan_insert); 1040 ocfs2_free_dir_lookup_result(&lookup); 1041 1042 if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) 1043 mlog_errno(status); 1044 1045 return status; 1046 } 1047 1048 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, 1049 u64 src_inode_no, u64 dest_inode_no) 1050 { 1051 int ret = 0, i = 0; 1052 u64 parent_inode_no = 0; 1053 u64 child_inode_no = src_inode_no; 1054 struct inode *child_inode; 1055 1056 #define MAX_LOOKUP_TIMES 32 1057 while (1) { 1058 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); 1059 if (IS_ERR(child_inode)) { 1060 ret = PTR_ERR(child_inode); 1061 break; 1062 } 1063 1064 ret = ocfs2_inode_lock(child_inode, NULL, 0); 1065 if (ret < 0) { 1066 iput(child_inode); 1067 if (ret != -ENOENT) 1068 mlog_errno(ret); 1069 break; 1070 } 1071 1072 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, 1073 &parent_inode_no); 1074 ocfs2_inode_unlock(child_inode, 0); 1075 iput(child_inode); 1076 if (ret < 0) { 1077 ret = -ENOENT; 1078 break; 1079 } 1080 1081 if (parent_inode_no == dest_inode_no) { 1082 ret = 1; 1083 break; 1084 } 1085 1086 if (parent_inode_no == osb->root_inode->i_ino) { 1087 ret = 0; 1088 break; 1089 } 1090 1091 child_inode_no = parent_inode_no; 1092 1093 if (++i >= MAX_LOOKUP_TIMES) { 1094 mlog_ratelimited(ML_NOTICE, "max lookup times reached, " 1095 "filesystem may have nested directories, " 1096 "src inode: %llu, dest inode: %llu.\n", 1097 (unsigned long long)src_inode_no, 1098 (unsigned long long)dest_inode_no); 1099 ret = 0; 1100 break; 1101 } 1102 } 1103 1104 return ret; 1105 } 1106 1107 /* 1108 * The only place this should be used is rename and link! 1109 * if they have the same id, then the 1st one is the only one locked. 1110 */ 1111 static int ocfs2_double_lock(struct ocfs2_super *osb, 1112 struct buffer_head **bh1, 1113 struct inode *inode1, 1114 struct buffer_head **bh2, 1115 struct inode *inode2, 1116 int rename) 1117 { 1118 int status; 1119 int inode1_is_ancestor, inode2_is_ancestor; 1120 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 1121 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 1122 1123 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 1124 (unsigned long long)oi2->ip_blkno); 1125 1126 if (*bh1) 1127 *bh1 = NULL; 1128 if (*bh2) 1129 *bh2 = NULL; 1130 1131 /* we always want to lock the one with the lower lockid first. 1132 * and if they are nested, we lock ancestor first */ 1133 if (oi1->ip_blkno != oi2->ip_blkno) { 1134 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, 1135 oi1->ip_blkno); 1136 if (inode1_is_ancestor < 0) { 1137 status = inode1_is_ancestor; 1138 goto bail; 1139 } 1140 1141 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, 1142 oi2->ip_blkno); 1143 if (inode2_is_ancestor < 0) { 1144 status = inode2_is_ancestor; 1145 goto bail; 1146 } 1147 1148 if ((inode1_is_ancestor == 1) || 1149 (oi1->ip_blkno < oi2->ip_blkno && 1150 inode2_is_ancestor == 0)) { 1151 /* switch id1 and id2 around */ 1152 swap(bh2, bh1); 1153 swap(inode2, inode1); 1154 } 1155 /* lock id2 */ 1156 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 1157 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); 1158 if (status < 0) { 1159 if (status != -ENOENT) 1160 mlog_errno(status); 1161 goto bail; 1162 } 1163 } 1164 1165 /* lock id1 */ 1166 status = ocfs2_inode_lock_nested(inode1, bh1, 1, 1167 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 1168 if (status < 0) { 1169 /* 1170 * An error return must mean that no cluster locks 1171 * were held on function exit. 1172 */ 1173 if (oi1->ip_blkno != oi2->ip_blkno) { 1174 ocfs2_inode_unlock(inode2, 1); 1175 brelse(*bh2); 1176 *bh2 = NULL; 1177 } 1178 1179 if (status != -ENOENT) 1180 mlog_errno(status); 1181 } 1182 1183 trace_ocfs2_double_lock_end( 1184 (unsigned long long)oi1->ip_blkno, 1185 (unsigned long long)oi2->ip_blkno); 1186 1187 bail: 1188 if (status) 1189 mlog_errno(status); 1190 return status; 1191 } 1192 1193 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1194 { 1195 ocfs2_inode_unlock(inode1, 1); 1196 1197 if (inode1 != inode2) 1198 ocfs2_inode_unlock(inode2, 1); 1199 } 1200 1201 static int ocfs2_rename(struct mnt_idmap *idmap, 1202 struct inode *old_dir, 1203 struct dentry *old_dentry, 1204 struct inode *new_dir, 1205 struct dentry *new_dentry, 1206 unsigned int flags) 1207 { 1208 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1209 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1210 struct inode *old_inode = d_inode(old_dentry); 1211 struct inode *new_inode = d_inode(new_dentry); 1212 struct inode *orphan_dir = NULL; 1213 struct ocfs2_dinode *newfe = NULL; 1214 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1215 struct buffer_head *newfe_bh = NULL; 1216 struct buffer_head *old_inode_bh = NULL; 1217 struct ocfs2_super *osb = NULL; 1218 u64 newfe_blkno, old_de_ino; 1219 handle_t *handle = NULL; 1220 struct buffer_head *old_dir_bh = NULL; 1221 struct buffer_head *new_dir_bh = NULL; 1222 u32 old_dir_nlink = old_dir->i_nlink; 1223 struct ocfs2_dinode *old_di; 1224 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1225 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1226 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1227 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1228 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1229 bool should_add_orphan = false; 1230 1231 if (flags) 1232 return -EINVAL; 1233 1234 /* At some point it might be nice to break this function up a 1235 * bit. */ 1236 1237 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, 1238 old_dentry->d_name.len, old_dentry->d_name.name, 1239 new_dentry->d_name.len, new_dentry->d_name.name); 1240 1241 status = dquot_initialize(old_dir); 1242 if (status) { 1243 mlog_errno(status); 1244 goto bail; 1245 } 1246 status = dquot_initialize(new_dir); 1247 if (status) { 1248 mlog_errno(status); 1249 goto bail; 1250 } 1251 1252 osb = OCFS2_SB(old_dir->i_sb); 1253 1254 if (new_inode) { 1255 if (!igrab(new_inode)) 1256 BUG(); 1257 } 1258 1259 /* Assume a directory hierarchy thusly: 1260 * a/b/c 1261 * a/d 1262 * a,b,c, and d are all directories. 1263 * 1264 * from cwd of 'a' on both nodes: 1265 * node1: mv b/c d 1266 * node2: mv d b/c 1267 * 1268 * And that's why, just like the VFS, we need a file system 1269 * rename lock. */ 1270 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1271 status = ocfs2_rename_lock(osb); 1272 if (status < 0) { 1273 mlog_errno(status); 1274 goto bail; 1275 } 1276 rename_lock = 1; 1277 1278 /* here we cannot guarantee the inodes haven't just been 1279 * changed, so check if they are nested again */ 1280 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, 1281 old_inode->i_ino); 1282 if (status < 0) { 1283 mlog_errno(status); 1284 goto bail; 1285 } else if (status == 1) { 1286 status = -EPERM; 1287 trace_ocfs2_rename_not_permitted( 1288 (unsigned long long)old_inode->i_ino, 1289 (unsigned long long)new_dir->i_ino); 1290 goto bail; 1291 } 1292 } 1293 1294 /* if old and new are the same, this'll just do one lock. */ 1295 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1296 &new_dir_bh, new_dir, 1); 1297 if (status < 0) { 1298 mlog_errno(status); 1299 goto bail; 1300 } 1301 parents_locked = 1; 1302 1303 if (!new_dir->i_nlink) { 1304 status = -EACCES; 1305 goto bail; 1306 } 1307 1308 /* make sure both dirs have bhs 1309 * get an extra ref on old_dir_bh if old==new */ 1310 if (!new_dir_bh) { 1311 if (old_dir_bh) { 1312 new_dir_bh = old_dir_bh; 1313 get_bh(new_dir_bh); 1314 } else { 1315 mlog(ML_ERROR, "no old_dir_bh!\n"); 1316 status = -EIO; 1317 goto bail; 1318 } 1319 } 1320 1321 /* 1322 * Aside from allowing a meta data update, the locking here 1323 * also ensures that the downconvert thread on other nodes 1324 * won't have to concurrently downconvert the inode and the 1325 * dentry locks. 1326 */ 1327 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1328 OI_LS_PARENT); 1329 if (status < 0) { 1330 if (status != -ENOENT) 1331 mlog_errno(status); 1332 goto bail; 1333 } 1334 old_child_locked = 1; 1335 1336 status = ocfs2_remote_dentry_delete(old_dentry); 1337 if (status < 0) { 1338 mlog_errno(status); 1339 goto bail; 1340 } 1341 1342 if (S_ISDIR(old_inode->i_mode) && new_dir != old_dir) { 1343 u64 old_inode_parent; 1344 1345 update_dot_dot = 1; 1346 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1347 old_inode, 1348 &old_inode_dot_dot_res); 1349 if (status) { 1350 status = -EIO; 1351 goto bail; 1352 } 1353 1354 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1355 status = -EIO; 1356 goto bail; 1357 } 1358 1359 if (!new_inode && new_dir->i_nlink >= ocfs2_link_max(osb)) { 1360 status = -EMLINK; 1361 goto bail; 1362 } 1363 } 1364 1365 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1366 old_dentry->d_name.len, 1367 &old_de_ino); 1368 if (status) { 1369 status = -ENOENT; 1370 goto bail; 1371 } 1372 1373 /* 1374 * Check for inode number is _not_ due to possible IO errors. 1375 * We might rmdir the source, keep it as pwd of some process 1376 * and merrily kill the link to whatever was created under the 1377 * same name. Goodbye sticky bit ;-< 1378 */ 1379 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1380 status = -ENOENT; 1381 goto bail; 1382 } 1383 1384 /* check if the target already exists (in which case we need 1385 * to delete it */ 1386 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1387 new_dentry->d_name.len, 1388 &newfe_blkno, new_dir, 1389 &target_lookup_res); 1390 /* The only error we allow here is -ENOENT because the new 1391 * file not existing is perfectly valid. */ 1392 if ((status < 0) && (status != -ENOENT)) { 1393 /* If we cannot find the file specified we should just */ 1394 /* return the error... */ 1395 mlog_errno(status); 1396 goto bail; 1397 } 1398 if (status == 0) 1399 target_exists = 1; 1400 1401 if (!target_exists && new_inode) { 1402 /* 1403 * Target was unlinked by another node while we were 1404 * waiting to get to ocfs2_rename(). There isn't 1405 * anything we can do here to help the situation, so 1406 * bubble up the appropriate error. 1407 */ 1408 status = -ENOENT; 1409 goto bail; 1410 } 1411 1412 /* In case we need to overwrite an existing file, we blow it 1413 * away first */ 1414 if (target_exists) { 1415 /* VFS didn't think there existed an inode here, but 1416 * someone else in the cluster must have raced our 1417 * rename to create one. Today we error cleanly, in 1418 * the future we should consider calling iget to build 1419 * a new struct inode for this entry. */ 1420 if (!new_inode) { 1421 status = -EACCES; 1422 1423 trace_ocfs2_rename_target_exists(new_dentry->d_name.len, 1424 new_dentry->d_name.name); 1425 goto bail; 1426 } 1427 1428 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1429 status = -EACCES; 1430 1431 trace_ocfs2_rename_disagree( 1432 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1433 (unsigned long long)newfe_blkno, 1434 OCFS2_I(new_inode)->ip_flags); 1435 goto bail; 1436 } 1437 1438 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1439 if (status < 0) { 1440 if (status != -ENOENT) 1441 mlog_errno(status); 1442 goto bail; 1443 } 1444 new_child_locked = 1; 1445 1446 status = ocfs2_remote_dentry_delete(new_dentry); 1447 if (status < 0) { 1448 mlog_errno(status); 1449 goto bail; 1450 } 1451 1452 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1453 1454 trace_ocfs2_rename_over_existing( 1455 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1456 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1457 1458 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1459 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1460 OCFS2_I(new_inode)->ip_blkno, 1461 orphan_name, &orphan_insert, 1462 false); 1463 if (status < 0) { 1464 mlog_errno(status); 1465 goto bail; 1466 } 1467 should_add_orphan = true; 1468 } 1469 } else { 1470 BUG_ON(d_inode(new_dentry->d_parent) != new_dir); 1471 1472 status = ocfs2_check_dir_for_entry(new_dir, 1473 new_dentry->d_name.name, 1474 new_dentry->d_name.len); 1475 if (status) 1476 goto bail; 1477 1478 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1479 new_dentry->d_name.name, 1480 new_dentry->d_name.len, 1481 &target_insert); 1482 if (status < 0) { 1483 mlog_errno(status); 1484 goto bail; 1485 } 1486 } 1487 1488 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1489 if (IS_ERR(handle)) { 1490 status = PTR_ERR(handle); 1491 handle = NULL; 1492 mlog_errno(status); 1493 goto bail; 1494 } 1495 1496 if (target_exists) { 1497 if (S_ISDIR(new_inode->i_mode)) { 1498 if (new_inode->i_nlink != 2 || 1499 !ocfs2_empty_dir(new_inode)) { 1500 status = -ENOTEMPTY; 1501 goto bail; 1502 } 1503 } 1504 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1505 newfe_bh, 1506 OCFS2_JOURNAL_ACCESS_WRITE); 1507 if (status < 0) { 1508 mlog_errno(status); 1509 goto bail; 1510 } 1511 1512 /* change the dirent to point to the correct inode */ 1513 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1514 old_inode); 1515 if (status < 0) { 1516 mlog_errno(status); 1517 goto bail; 1518 } 1519 inode_inc_iversion(new_dir); 1520 1521 if (S_ISDIR(new_inode->i_mode)) 1522 ocfs2_set_links_count(newfe, 0); 1523 else 1524 ocfs2_add_links_count(newfe, -1); 1525 ocfs2_journal_dirty(handle, newfe_bh); 1526 if (should_add_orphan) { 1527 status = ocfs2_orphan_add(osb, handle, new_inode, 1528 newfe_bh, orphan_name, 1529 &orphan_insert, orphan_dir, false); 1530 if (status < 0) { 1531 mlog_errno(status); 1532 goto bail; 1533 } 1534 } 1535 } else { 1536 /* if the name was not found in new_dir, add it now */ 1537 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1538 OCFS2_I(old_inode)->ip_blkno, 1539 new_dir_bh, &target_insert); 1540 if (status < 0) { 1541 mlog_errno(status); 1542 goto bail; 1543 } 1544 } 1545 1546 inode_set_ctime_current(old_inode); 1547 mark_inode_dirty(old_inode); 1548 1549 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1550 old_inode_bh, 1551 OCFS2_JOURNAL_ACCESS_WRITE); 1552 if (status >= 0) { 1553 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1554 1555 old_di->i_ctime = cpu_to_le64(inode_get_ctime_sec(old_inode)); 1556 old_di->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(old_inode)); 1557 ocfs2_journal_dirty(handle, old_inode_bh); 1558 } else 1559 mlog_errno(status); 1560 1561 /* 1562 * Now that the name has been added to new_dir, remove the old name. 1563 * 1564 * We don't keep any directory entry context around until now 1565 * because the insert might have changed the type of directory 1566 * we're dealing with. 1567 */ 1568 status = ocfs2_find_entry(old_dentry->d_name.name, 1569 old_dentry->d_name.len, old_dir, 1570 &old_entry_lookup); 1571 if (status) { 1572 if (!is_journal_aborted(osb->journal->j_journal)) { 1573 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1574 "is not deleted.", 1575 new_dentry->d_name.len, new_dentry->d_name.name, 1576 old_dentry->d_name.len, old_dentry->d_name.name); 1577 } 1578 goto bail; 1579 } 1580 1581 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1582 if (status < 0) { 1583 mlog_errno(status); 1584 if (!is_journal_aborted(osb->journal->j_journal)) { 1585 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1586 "is not deleted.", 1587 new_dentry->d_name.len, new_dentry->d_name.name, 1588 old_dentry->d_name.len, old_dentry->d_name.name); 1589 } 1590 goto bail; 1591 } 1592 1593 if (new_inode) { 1594 drop_nlink(new_inode); 1595 inode_set_ctime_current(new_inode); 1596 } 1597 inode_set_mtime_to_ts(old_dir, inode_set_ctime_current(old_dir)); 1598 1599 if (update_dot_dot) { 1600 status = ocfs2_update_entry(old_inode, handle, 1601 &old_inode_dot_dot_res, new_dir); 1602 if (status < 0) { 1603 mlog_errno(status); 1604 goto bail; 1605 } 1606 } 1607 1608 if (S_ISDIR(old_inode->i_mode)) { 1609 drop_nlink(old_dir); 1610 if (new_inode) { 1611 drop_nlink(new_inode); 1612 } else { 1613 inc_nlink(new_dir); 1614 mark_inode_dirty(new_dir); 1615 } 1616 } 1617 mark_inode_dirty(old_dir); 1618 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1619 if (new_inode) { 1620 mark_inode_dirty(new_inode); 1621 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1622 } 1623 1624 if (old_dir != new_dir) { 1625 /* Keep the same times on both directories.*/ 1626 inode_set_mtime_to_ts(new_dir, 1627 inode_set_ctime_to_ts(new_dir, inode_get_ctime(old_dir))); 1628 1629 /* 1630 * This will also pick up the i_nlink change from the 1631 * block above. 1632 */ 1633 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1634 } 1635 1636 if (old_dir_nlink != old_dir->i_nlink) { 1637 if (!old_dir_bh) { 1638 mlog(ML_ERROR, "need to change nlink for old dir " 1639 "%llu from %d to %d but bh is NULL!\n", 1640 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1641 (int)old_dir_nlink, old_dir->i_nlink); 1642 } else { 1643 struct ocfs2_dinode *fe; 1644 status = ocfs2_journal_access_di(handle, 1645 INODE_CACHE(old_dir), 1646 old_dir_bh, 1647 OCFS2_JOURNAL_ACCESS_WRITE); 1648 if (status < 0) { 1649 mlog_errno(status); 1650 goto bail; 1651 } 1652 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1653 ocfs2_set_links_count(fe, old_dir->i_nlink); 1654 ocfs2_journal_dirty(handle, old_dir_bh); 1655 } 1656 } 1657 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1658 status = 0; 1659 bail: 1660 if (handle) 1661 ocfs2_commit_trans(osb, handle); 1662 1663 if (orphan_dir) { 1664 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1665 ocfs2_inode_unlock(orphan_dir, 1); 1666 inode_unlock(orphan_dir); 1667 iput(orphan_dir); 1668 } 1669 1670 if (new_child_locked) 1671 ocfs2_inode_unlock(new_inode, 1); 1672 1673 if (old_child_locked) 1674 ocfs2_inode_unlock(old_inode, 1); 1675 1676 if (parents_locked) 1677 ocfs2_double_unlock(old_dir, new_dir); 1678 1679 if (rename_lock) 1680 ocfs2_rename_unlock(osb); 1681 1682 if (new_inode) 1683 sync_mapping_buffers(old_inode->i_mapping); 1684 1685 iput(new_inode); 1686 1687 ocfs2_free_dir_lookup_result(&target_lookup_res); 1688 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1689 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1690 ocfs2_free_dir_lookup_result(&orphan_insert); 1691 ocfs2_free_dir_lookup_result(&target_insert); 1692 1693 brelse(newfe_bh); 1694 brelse(old_inode_bh); 1695 brelse(old_dir_bh); 1696 brelse(new_dir_bh); 1697 1698 if (status) 1699 mlog_errno(status); 1700 1701 return status; 1702 } 1703 1704 /* 1705 * we expect i_size = strlen(symname). Copy symname into the file 1706 * data, including the null terminator. 1707 */ 1708 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1709 handle_t *handle, 1710 struct inode *inode, 1711 const char *symname) 1712 { 1713 struct buffer_head **bhs = NULL; 1714 const char *c; 1715 struct super_block *sb = osb->sb; 1716 u64 p_blkno, p_blocks; 1717 int virtual, blocks, status, i, bytes_left; 1718 1719 bytes_left = i_size_read(inode) + 1; 1720 /* we can't trust i_blocks because we're actually going to 1721 * write i_size + 1 bytes. */ 1722 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1723 1724 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, 1725 i_size_read(inode), blocks); 1726 1727 /* Sanity check -- make sure we're going to fit. */ 1728 if (bytes_left > 1729 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1730 status = -EIO; 1731 mlog_errno(status); 1732 goto bail; 1733 } 1734 1735 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1736 if (!bhs) { 1737 status = -ENOMEM; 1738 mlog_errno(status); 1739 goto bail; 1740 } 1741 1742 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1743 NULL); 1744 if (status < 0) { 1745 mlog_errno(status); 1746 goto bail; 1747 } 1748 1749 /* links can never be larger than one cluster so we know this 1750 * is all going to be contiguous, but do a sanity check 1751 * anyway. */ 1752 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1753 status = -EIO; 1754 mlog_errno(status); 1755 goto bail; 1756 } 1757 1758 virtual = 0; 1759 while(bytes_left > 0) { 1760 c = &symname[virtual * sb->s_blocksize]; 1761 1762 bhs[virtual] = sb_getblk(sb, p_blkno); 1763 if (!bhs[virtual]) { 1764 status = -ENOMEM; 1765 mlog_errno(status); 1766 goto bail; 1767 } 1768 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1769 bhs[virtual]); 1770 1771 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1772 bhs[virtual], 1773 OCFS2_JOURNAL_ACCESS_CREATE); 1774 if (status < 0) { 1775 mlog_errno(status); 1776 goto bail; 1777 } 1778 1779 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1780 1781 memcpy(bhs[virtual]->b_data, c, 1782 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1783 bytes_left); 1784 1785 ocfs2_journal_dirty(handle, bhs[virtual]); 1786 1787 virtual++; 1788 p_blkno++; 1789 bytes_left -= sb->s_blocksize; 1790 } 1791 1792 status = 0; 1793 bail: 1794 1795 if (bhs) { 1796 for(i = 0; i < blocks; i++) 1797 brelse(bhs[i]); 1798 kfree(bhs); 1799 } 1800 1801 if (status) 1802 mlog_errno(status); 1803 return status; 1804 } 1805 1806 static int ocfs2_symlink(struct mnt_idmap *idmap, 1807 struct inode *dir, 1808 struct dentry *dentry, 1809 const char *symname) 1810 { 1811 int status, l, credits; 1812 u64 newsize; 1813 struct ocfs2_super *osb = NULL; 1814 struct inode *inode = NULL; 1815 struct super_block *sb; 1816 struct buffer_head *new_fe_bh = NULL; 1817 struct buffer_head *parent_fe_bh = NULL; 1818 struct ocfs2_dinode *fe = NULL; 1819 struct ocfs2_dinode *dirfe; 1820 handle_t *handle = NULL; 1821 struct ocfs2_alloc_context *inode_ac = NULL; 1822 struct ocfs2_alloc_context *data_ac = NULL; 1823 struct ocfs2_alloc_context *xattr_ac = NULL; 1824 int want_clusters = 0; 1825 int xattr_credits = 0; 1826 struct ocfs2_security_xattr_info si = { 1827 .name = NULL, 1828 .enable = 1, 1829 }; 1830 int did_quota = 0, did_quota_inode = 0; 1831 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1832 sigset_t oldset; 1833 int did_block_signals = 0; 1834 struct ocfs2_dentry_lock *dl = NULL; 1835 1836 trace_ocfs2_symlink_begin(dir, dentry, symname, 1837 dentry->d_name.len, dentry->d_name.name); 1838 1839 status = dquot_initialize(dir); 1840 if (status) { 1841 mlog_errno(status); 1842 goto bail; 1843 } 1844 1845 sb = dir->i_sb; 1846 osb = OCFS2_SB(sb); 1847 1848 l = strlen(symname) + 1; 1849 1850 credits = ocfs2_calc_symlink_credits(sb); 1851 1852 /* lock the parent directory */ 1853 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1854 if (status < 0) { 1855 if (status != -ENOENT) 1856 mlog_errno(status); 1857 return status; 1858 } 1859 1860 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1861 if (!ocfs2_read_links_count(dirfe)) { 1862 /* can't make a file in a deleted directory. */ 1863 status = -ENOENT; 1864 goto bail; 1865 } 1866 1867 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1868 dentry->d_name.len); 1869 if (status) 1870 goto bail; 1871 1872 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1873 dentry->d_name.name, 1874 dentry->d_name.len, &lookup); 1875 if (status < 0) { 1876 mlog_errno(status); 1877 goto bail; 1878 } 1879 1880 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1881 if (status < 0) { 1882 if (status != -ENOSPC) 1883 mlog_errno(status); 1884 goto bail; 1885 } 1886 1887 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1888 if (IS_ERR(inode)) { 1889 status = PTR_ERR(inode); 1890 inode = NULL; 1891 mlog_errno(status); 1892 goto bail; 1893 } 1894 1895 /* get security xattr */ 1896 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1897 if (status) { 1898 if (status == -EOPNOTSUPP) 1899 si.enable = 0; 1900 else { 1901 mlog_errno(status); 1902 goto bail; 1903 } 1904 } 1905 1906 /* calculate meta data/clusters for setting security xattr */ 1907 if (si.enable) { 1908 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1909 &xattr_credits, &xattr_ac); 1910 if (status < 0) { 1911 mlog_errno(status); 1912 goto bail; 1913 } 1914 } 1915 1916 /* don't reserve bitmap space for fast symlinks. */ 1917 if (l > ocfs2_fast_symlink_chars(sb)) 1918 want_clusters += 1; 1919 1920 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1921 if (status < 0) { 1922 if (status != -ENOSPC) 1923 mlog_errno(status); 1924 goto bail; 1925 } 1926 1927 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1928 if (IS_ERR(handle)) { 1929 status = PTR_ERR(handle); 1930 handle = NULL; 1931 mlog_errno(status); 1932 goto bail; 1933 } 1934 1935 /* Starting to change things, restart is no longer possible. */ 1936 ocfs2_block_signals(&oldset); 1937 did_block_signals = 1; 1938 1939 status = dquot_alloc_inode(inode); 1940 if (status) 1941 goto bail; 1942 did_quota_inode = 1; 1943 1944 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1945 dentry->d_name.name, 1946 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1947 inode->i_mode); 1948 1949 status = ocfs2_mknod_locked(osb, dir, inode, 1950 0, &new_fe_bh, parent_fe_bh, handle, 1951 inode_ac); 1952 if (status < 0) { 1953 mlog_errno(status); 1954 goto bail; 1955 } 1956 1957 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1958 inode->i_rdev = 0; 1959 newsize = l - 1; 1960 inode->i_op = &ocfs2_symlink_inode_operations; 1961 inode_nohighmem(inode); 1962 if (l > ocfs2_fast_symlink_chars(sb)) { 1963 u32 offset = 0; 1964 1965 status = dquot_alloc_space_nodirty(inode, 1966 ocfs2_clusters_to_bytes(osb->sb, 1)); 1967 if (status) 1968 goto bail; 1969 did_quota = 1; 1970 inode->i_mapping->a_ops = &ocfs2_aops; 1971 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1972 new_fe_bh, 1973 handle, data_ac, NULL, 1974 NULL); 1975 if (status < 0) { 1976 if (status != -ENOSPC && status != -EINTR) { 1977 mlog(ML_ERROR, 1978 "Failed to extend file to %llu\n", 1979 (unsigned long long)newsize); 1980 mlog_errno(status); 1981 status = -ENOSPC; 1982 } 1983 goto bail; 1984 } 1985 i_size_write(inode, newsize); 1986 inode->i_blocks = ocfs2_inode_sector_count(inode); 1987 } else { 1988 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1989 memcpy((char *) fe->id2.i_symlink, symname, l); 1990 i_size_write(inode, newsize); 1991 inode->i_blocks = 0; 1992 } 1993 1994 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1995 if (status < 0) { 1996 mlog_errno(status); 1997 goto bail; 1998 } 1999 2000 if (!ocfs2_inode_is_fast_symlink(inode)) { 2001 status = ocfs2_create_symlink_data(osb, handle, inode, 2002 symname); 2003 if (status < 0) { 2004 mlog_errno(status); 2005 goto bail; 2006 } 2007 } 2008 2009 if (si.enable) { 2010 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 2011 xattr_ac, data_ac); 2012 if (status < 0) { 2013 mlog_errno(status); 2014 goto bail; 2015 } 2016 } 2017 2018 /* 2019 * Do this before adding the entry to the directory. We add 2020 * also set d_op after success so that ->d_iput() will cleanup 2021 * the dentry lock even if ocfs2_add_entry() fails below. 2022 */ 2023 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 2024 if (status) { 2025 mlog_errno(status); 2026 goto bail; 2027 } 2028 2029 dl = dentry->d_fsdata; 2030 2031 status = ocfs2_add_entry(handle, dentry, inode, 2032 le64_to_cpu(fe->i_blkno), parent_fe_bh, 2033 &lookup); 2034 if (status < 0) { 2035 mlog_errno(status); 2036 goto bail; 2037 } 2038 2039 insert_inode_hash(inode); 2040 d_instantiate(dentry, inode); 2041 bail: 2042 if (status < 0 && did_quota) 2043 dquot_free_space_nodirty(inode, 2044 ocfs2_clusters_to_bytes(osb->sb, 1)); 2045 if (status < 0 && did_quota_inode) 2046 dquot_free_inode(inode); 2047 if (handle) { 2048 if (status < 0 && fe) 2049 ocfs2_set_links_count(fe, 0); 2050 ocfs2_commit_trans(osb, handle); 2051 } 2052 2053 ocfs2_inode_unlock(dir, 1); 2054 if (did_block_signals) 2055 ocfs2_unblock_signals(&oldset); 2056 2057 brelse(new_fe_bh); 2058 brelse(parent_fe_bh); 2059 kfree(si.value); 2060 ocfs2_free_dir_lookup_result(&lookup); 2061 if (inode_ac) 2062 ocfs2_free_alloc_context(inode_ac); 2063 if (data_ac) 2064 ocfs2_free_alloc_context(data_ac); 2065 if (xattr_ac) 2066 ocfs2_free_alloc_context(xattr_ac); 2067 if ((status < 0) && inode) { 2068 if (dl) 2069 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 2070 2071 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 2072 clear_nlink(inode); 2073 iput(inode); 2074 } 2075 2076 if (status) 2077 mlog_errno(status); 2078 2079 return status; 2080 } 2081 2082 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2083 { 2084 int status, namelen; 2085 2086 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2087 (long long)blkno); 2088 if (namelen <= 0) { 2089 if (namelen) 2090 status = namelen; 2091 else 2092 status = -EINVAL; 2093 mlog_errno(status); 2094 goto bail; 2095 } 2096 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2097 status = -EINVAL; 2098 mlog_errno(status); 2099 goto bail; 2100 } 2101 2102 trace_ocfs2_blkno_stringify(blkno, name, namelen); 2103 2104 status = 0; 2105 bail: 2106 if (status < 0) 2107 mlog_errno(status); 2108 return status; 2109 } 2110 2111 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, 2112 struct inode **ret_orphan_dir, 2113 struct buffer_head **ret_orphan_dir_bh) 2114 { 2115 struct inode *orphan_dir_inode; 2116 struct buffer_head *orphan_dir_bh = NULL; 2117 int ret = 0; 2118 2119 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2120 ORPHAN_DIR_SYSTEM_INODE, 2121 osb->slot_num); 2122 if (!orphan_dir_inode) { 2123 ret = -ENOENT; 2124 mlog_errno(ret); 2125 return ret; 2126 } 2127 2128 inode_lock(orphan_dir_inode); 2129 2130 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2131 if (ret < 0) { 2132 inode_unlock(orphan_dir_inode); 2133 iput(orphan_dir_inode); 2134 2135 mlog_errno(ret); 2136 return ret; 2137 } 2138 2139 *ret_orphan_dir = orphan_dir_inode; 2140 *ret_orphan_dir_bh = orphan_dir_bh; 2141 2142 return 0; 2143 } 2144 2145 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, 2146 struct buffer_head *orphan_dir_bh, 2147 u64 blkno, 2148 char *name, 2149 struct ocfs2_dir_lookup_result *lookup, 2150 bool dio) 2151 { 2152 int ret; 2153 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); 2154 int namelen = dio ? 2155 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2156 OCFS2_ORPHAN_NAMELEN; 2157 2158 if (dio) { 2159 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2160 OCFS2_DIO_ORPHAN_PREFIX); 2161 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2162 ret = -EINVAL; 2163 mlog_errno(ret); 2164 return ret; 2165 } 2166 2167 ret = ocfs2_blkno_stringify(blkno, 2168 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2169 } else 2170 ret = ocfs2_blkno_stringify(blkno, name); 2171 if (ret < 0) { 2172 mlog_errno(ret); 2173 return ret; 2174 } 2175 2176 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2177 orphan_dir_bh, name, 2178 namelen, lookup); 2179 if (ret < 0) { 2180 mlog_errno(ret); 2181 return ret; 2182 } 2183 2184 return 0; 2185 } 2186 2187 /** 2188 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for 2189 * insertion of an orphan. 2190 * @osb: ocfs2 file system 2191 * @ret_orphan_dir: Orphan dir inode - returned locked! 2192 * @blkno: Actual block number of the inode to be inserted into orphan dir. 2193 * @name: Buffer to store the name of the orphan. 2194 * @lookup: dir lookup result, to be passed back into functions like 2195 * ocfs2_orphan_add 2196 * @dio: Flag indicating if direct IO is being used or not. 2197 * 2198 * Returns zero on success and the ret_orphan_dir, name and lookup 2199 * fields will be populated. 2200 * 2201 * Returns non-zero on failure. 2202 */ 2203 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2204 struct inode **ret_orphan_dir, 2205 u64 blkno, 2206 char *name, 2207 struct ocfs2_dir_lookup_result *lookup, 2208 bool dio) 2209 { 2210 struct inode *orphan_dir_inode = NULL; 2211 struct buffer_head *orphan_dir_bh = NULL; 2212 int ret = 0; 2213 2214 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, 2215 &orphan_dir_bh); 2216 if (ret < 0) { 2217 mlog_errno(ret); 2218 return ret; 2219 } 2220 2221 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, 2222 blkno, name, lookup, dio); 2223 if (ret < 0) { 2224 mlog_errno(ret); 2225 goto out; 2226 } 2227 2228 *ret_orphan_dir = orphan_dir_inode; 2229 2230 out: 2231 brelse(orphan_dir_bh); 2232 2233 if (ret) { 2234 ocfs2_inode_unlock(orphan_dir_inode, 1); 2235 inode_unlock(orphan_dir_inode); 2236 iput(orphan_dir_inode); 2237 } 2238 2239 if (ret) 2240 mlog_errno(ret); 2241 return ret; 2242 } 2243 2244 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2245 handle_t *handle, 2246 struct inode *inode, 2247 struct buffer_head *fe_bh, 2248 char *name, 2249 struct ocfs2_dir_lookup_result *lookup, 2250 struct inode *orphan_dir_inode, 2251 bool dio) 2252 { 2253 struct buffer_head *orphan_dir_bh = NULL; 2254 int status = 0; 2255 struct ocfs2_dinode *orphan_fe; 2256 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 2257 int namelen = dio ? 2258 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2259 OCFS2_ORPHAN_NAMELEN; 2260 2261 trace_ocfs2_orphan_add_begin( 2262 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2263 2264 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 2265 if (status < 0) { 2266 mlog_errno(status); 2267 goto leave; 2268 } 2269 2270 status = ocfs2_journal_access_di(handle, 2271 INODE_CACHE(orphan_dir_inode), 2272 orphan_dir_bh, 2273 OCFS2_JOURNAL_ACCESS_WRITE); 2274 if (status < 0) { 2275 mlog_errno(status); 2276 goto leave; 2277 } 2278 2279 /* 2280 * We're going to journal the change of i_flags and i_orphaned_slot. 2281 * It's safe anyway, though some callers may duplicate the journaling. 2282 * Journaling within the func just make the logic look more 2283 * straightforward. 2284 */ 2285 status = ocfs2_journal_access_di(handle, 2286 INODE_CACHE(inode), 2287 fe_bh, 2288 OCFS2_JOURNAL_ACCESS_WRITE); 2289 if (status < 0) { 2290 mlog_errno(status); 2291 goto leave; 2292 } 2293 2294 /* we're a cluster, and nlink can change on disk from 2295 * underneath us... */ 2296 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2297 if (S_ISDIR(inode->i_mode)) 2298 ocfs2_add_links_count(orphan_fe, 1); 2299 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2300 ocfs2_journal_dirty(handle, orphan_dir_bh); 2301 2302 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2303 namelen, inode, 2304 OCFS2_I(inode)->ip_blkno, 2305 orphan_dir_bh, lookup); 2306 if (status < 0) { 2307 mlog_errno(status); 2308 goto rollback; 2309 } 2310 2311 if (dio) { 2312 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan 2313 * slot. 2314 */ 2315 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2316 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); 2317 } else { 2318 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL); 2319 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; 2320 2321 /* Record which orphan dir our inode now resides 2322 * in. delete_inode will use this to determine which orphan 2323 * dir to lock. */ 2324 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2325 } 2326 2327 ocfs2_journal_dirty(handle, fe_bh); 2328 2329 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, 2330 osb->slot_num); 2331 2332 rollback: 2333 if (status < 0) { 2334 if (S_ISDIR(inode->i_mode)) 2335 ocfs2_add_links_count(orphan_fe, -1); 2336 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2337 } 2338 2339 leave: 2340 brelse(orphan_dir_bh); 2341 2342 return status; 2343 } 2344 2345 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2346 int ocfs2_orphan_del(struct ocfs2_super *osb, 2347 handle_t *handle, 2348 struct inode *orphan_dir_inode, 2349 struct inode *inode, 2350 struct buffer_head *orphan_dir_bh, 2351 bool dio) 2352 { 2353 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2354 struct ocfs2_dinode *orphan_fe; 2355 int status = 0; 2356 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2357 2358 if (dio) { 2359 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2360 OCFS2_DIO_ORPHAN_PREFIX); 2361 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2362 status = -EINVAL; 2363 mlog_errno(status); 2364 return status; 2365 } 2366 2367 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, 2368 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2369 } else 2370 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2371 if (status < 0) { 2372 mlog_errno(status); 2373 goto leave; 2374 } 2375 2376 trace_ocfs2_orphan_del( 2377 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2378 name, strlen(name)); 2379 2380 status = ocfs2_journal_access_di(handle, 2381 INODE_CACHE(orphan_dir_inode), 2382 orphan_dir_bh, 2383 OCFS2_JOURNAL_ACCESS_WRITE); 2384 if (status < 0) { 2385 mlog_errno(status); 2386 goto leave; 2387 } 2388 2389 /* find it's spot in the orphan directory */ 2390 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode, 2391 &lookup); 2392 if (status) { 2393 mlog_errno(status); 2394 goto leave; 2395 } 2396 2397 /* remove it from the orphan directory */ 2398 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); 2399 if (status < 0) { 2400 mlog_errno(status); 2401 goto leave; 2402 } 2403 2404 /* do the i_nlink dance! :) */ 2405 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2406 if (S_ISDIR(inode->i_mode)) 2407 ocfs2_add_links_count(orphan_fe, -1); 2408 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2409 ocfs2_journal_dirty(handle, orphan_dir_bh); 2410 2411 leave: 2412 ocfs2_free_dir_lookup_result(&lookup); 2413 2414 if (status) 2415 mlog_errno(status); 2416 return status; 2417 } 2418 2419 /** 2420 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly 2421 * allocated file. This is different from the typical 'add to orphan dir' 2422 * operation in that the inode does not yet exist. This is a problem because 2423 * the orphan dir stringifies the inode block number to come up with it's 2424 * dirent. Obviously if the inode does not yet exist we have a chicken and egg 2425 * problem. This function works around it by calling deeper into the orphan 2426 * and suballoc code than other callers. Use this only by necessity. 2427 * @dir: The directory which this inode will ultimately wind up under - not the 2428 * orphan dir! 2429 * @dir_bh: buffer_head the @dir inode block 2430 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled 2431 * with the string to be used for orphan dirent. Pass back to the orphan dir 2432 * code. 2433 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan 2434 * dir code. 2435 * @ret_di_blkno: block number where the new inode will be allocated. 2436 * @orphan_insert: Dir insert context to be passed back into orphan dir code. 2437 * @ret_inode_ac: Inode alloc context to be passed back to the allocator. 2438 * 2439 * Returns zero on success and the ret_orphan_dir, name and lookup 2440 * fields will be populated. 2441 * 2442 * Returns non-zero on failure. 2443 */ 2444 static int ocfs2_prep_new_orphaned_file(struct inode *dir, 2445 struct buffer_head *dir_bh, 2446 char *orphan_name, 2447 struct inode **ret_orphan_dir, 2448 u64 *ret_di_blkno, 2449 struct ocfs2_dir_lookup_result *orphan_insert, 2450 struct ocfs2_alloc_context **ret_inode_ac) 2451 { 2452 int ret; 2453 u64 di_blkno; 2454 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2455 struct inode *orphan_dir = NULL; 2456 struct buffer_head *orphan_dir_bh = NULL; 2457 struct ocfs2_alloc_context *inode_ac = NULL; 2458 2459 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); 2460 if (ret < 0) { 2461 mlog_errno(ret); 2462 return ret; 2463 } 2464 2465 /* reserve an inode spot */ 2466 ret = ocfs2_reserve_new_inode(osb, &inode_ac); 2467 if (ret < 0) { 2468 if (ret != -ENOSPC) 2469 mlog_errno(ret); 2470 goto out; 2471 } 2472 2473 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, 2474 &di_blkno); 2475 if (ret) { 2476 mlog_errno(ret); 2477 goto out; 2478 } 2479 2480 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, 2481 di_blkno, orphan_name, orphan_insert, 2482 false); 2483 if (ret < 0) { 2484 mlog_errno(ret); 2485 goto out; 2486 } 2487 2488 out: 2489 if (ret == 0) { 2490 *ret_orphan_dir = orphan_dir; 2491 *ret_di_blkno = di_blkno; 2492 *ret_inode_ac = inode_ac; 2493 /* 2494 * orphan_name and orphan_insert are already up to 2495 * date via prepare_orphan_dir 2496 */ 2497 } else { 2498 /* Unroll reserve_new_inode* */ 2499 if (inode_ac) 2500 ocfs2_free_alloc_context(inode_ac); 2501 2502 /* Unroll orphan dir locking */ 2503 inode_unlock(orphan_dir); 2504 ocfs2_inode_unlock(orphan_dir, 1); 2505 iput(orphan_dir); 2506 } 2507 2508 brelse(orphan_dir_bh); 2509 2510 return ret; 2511 } 2512 2513 int ocfs2_create_inode_in_orphan(struct inode *dir, 2514 int mode, 2515 struct inode **new_inode) 2516 { 2517 int status, did_quota_inode = 0; 2518 struct inode *inode = NULL; 2519 struct inode *orphan_dir = NULL; 2520 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2521 handle_t *handle = NULL; 2522 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2523 struct buffer_head *parent_di_bh = NULL; 2524 struct buffer_head *new_di_bh = NULL; 2525 struct ocfs2_alloc_context *inode_ac = NULL; 2526 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2527 u64 di_blkno, suballoc_loc; 2528 u16 suballoc_bit; 2529 2530 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2531 if (status < 0) { 2532 if (status != -ENOENT) 2533 mlog_errno(status); 2534 return status; 2535 } 2536 2537 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, 2538 orphan_name, &orphan_dir, 2539 &di_blkno, &orphan_insert, &inode_ac); 2540 if (status < 0) { 2541 if (status != -ENOSPC) 2542 mlog_errno(status); 2543 goto leave; 2544 } 2545 2546 inode = ocfs2_get_init_inode(dir, mode); 2547 if (IS_ERR(inode)) { 2548 status = PTR_ERR(inode); 2549 inode = NULL; 2550 mlog_errno(status); 2551 goto leave; 2552 } 2553 2554 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2555 if (IS_ERR(handle)) { 2556 status = PTR_ERR(handle); 2557 handle = NULL; 2558 mlog_errno(status); 2559 goto leave; 2560 } 2561 2562 status = dquot_alloc_inode(inode); 2563 if (status) 2564 goto leave; 2565 did_quota_inode = 1; 2566 2567 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, 2568 &suballoc_loc, 2569 &suballoc_bit, di_blkno); 2570 if (status < 0) { 2571 mlog_errno(status); 2572 goto leave; 2573 } 2574 2575 clear_nlink(inode); 2576 /* do the real work now. */ 2577 status = __ocfs2_mknod_locked(dir, inode, 2578 0, &new_di_bh, handle, 2579 inode_ac, di_blkno, suballoc_loc, 2580 suballoc_bit); 2581 if (status < 0) { 2582 mlog_errno(status); 2583 goto leave; 2584 } 2585 2586 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, 2587 &orphan_insert, orphan_dir, false); 2588 if (status < 0) { 2589 mlog_errno(status); 2590 goto leave; 2591 } 2592 2593 /* get open lock so that only nodes can't remove it from orphan dir. */ 2594 status = ocfs2_open_lock(inode); 2595 if (status < 0) 2596 mlog_errno(status); 2597 2598 insert_inode_hash(inode); 2599 leave: 2600 if (status < 0 && did_quota_inode) 2601 dquot_free_inode(inode); 2602 if (handle) 2603 ocfs2_commit_trans(osb, handle); 2604 2605 if (orphan_dir) { 2606 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2607 ocfs2_inode_unlock(orphan_dir, 1); 2608 inode_unlock(orphan_dir); 2609 iput(orphan_dir); 2610 } 2611 2612 if ((status < 0) && inode) { 2613 clear_nlink(inode); 2614 iput(inode); 2615 } 2616 2617 if (inode_ac) 2618 ocfs2_free_alloc_context(inode_ac); 2619 2620 brelse(new_di_bh); 2621 2622 if (!status) 2623 *new_inode = inode; 2624 2625 ocfs2_free_dir_lookup_result(&orphan_insert); 2626 2627 ocfs2_inode_unlock(dir, 1); 2628 brelse(parent_di_bh); 2629 return status; 2630 } 2631 2632 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, 2633 struct inode *inode) 2634 { 2635 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2636 struct inode *orphan_dir_inode = NULL; 2637 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2638 struct buffer_head *di_bh = NULL; 2639 int status = 0; 2640 handle_t *handle = NULL; 2641 struct ocfs2_dinode *di = NULL; 2642 2643 status = ocfs2_inode_lock(inode, &di_bh, 1); 2644 if (status < 0) { 2645 mlog_errno(status); 2646 goto bail; 2647 } 2648 2649 di = (struct ocfs2_dinode *) di_bh->b_data; 2650 /* 2651 * Another append dio crashed? 2652 * If so, manually recover it first. 2653 */ 2654 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 2655 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode)); 2656 if (status < 0) { 2657 if (status != -ENOSPC) 2658 mlog_errno(status); 2659 goto bail_unlock_inode; 2660 } 2661 2662 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0); 2663 if (status < 0) { 2664 mlog_errno(status); 2665 goto bail_unlock_inode; 2666 } 2667 } 2668 2669 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, 2670 OCFS2_I(inode)->ip_blkno, 2671 orphan_name, 2672 &orphan_insert, 2673 true); 2674 if (status < 0) { 2675 mlog_errno(status); 2676 goto bail_unlock_inode; 2677 } 2678 2679 handle = ocfs2_start_trans(osb, 2680 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); 2681 if (IS_ERR(handle)) { 2682 status = PTR_ERR(handle); 2683 goto bail_unlock_orphan; 2684 } 2685 2686 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, 2687 &orphan_insert, orphan_dir_inode, true); 2688 if (status) 2689 mlog_errno(status); 2690 2691 ocfs2_commit_trans(osb, handle); 2692 2693 bail_unlock_orphan: 2694 ocfs2_inode_unlock(orphan_dir_inode, 1); 2695 inode_unlock(orphan_dir_inode); 2696 iput(orphan_dir_inode); 2697 2698 ocfs2_free_dir_lookup_result(&orphan_insert); 2699 2700 bail_unlock_inode: 2701 ocfs2_inode_unlock(inode, 1); 2702 brelse(di_bh); 2703 2704 bail: 2705 return status; 2706 } 2707 2708 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, 2709 struct inode *inode, struct buffer_head *di_bh, 2710 int update_isize, loff_t end) 2711 { 2712 struct inode *orphan_dir_inode = NULL; 2713 struct buffer_head *orphan_dir_bh = NULL; 2714 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2715 handle_t *handle = NULL; 2716 int status = 0; 2717 2718 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2719 ORPHAN_DIR_SYSTEM_INODE, 2720 le16_to_cpu(di->i_dio_orphaned_slot)); 2721 if (!orphan_dir_inode) { 2722 status = -ENOENT; 2723 mlog_errno(status); 2724 goto bail; 2725 } 2726 2727 inode_lock(orphan_dir_inode); 2728 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2729 if (status < 0) { 2730 inode_unlock(orphan_dir_inode); 2731 iput(orphan_dir_inode); 2732 mlog_errno(status); 2733 goto bail; 2734 } 2735 2736 handle = ocfs2_start_trans(osb, 2737 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); 2738 if (IS_ERR(handle)) { 2739 status = PTR_ERR(handle); 2740 goto bail_unlock_orphan; 2741 } 2742 2743 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); 2744 2745 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, 2746 inode, orphan_dir_bh, true); 2747 if (status < 0) { 2748 mlog_errno(status); 2749 goto bail_commit; 2750 } 2751 2752 status = ocfs2_journal_access_di(handle, 2753 INODE_CACHE(inode), 2754 di_bh, 2755 OCFS2_JOURNAL_ACCESS_WRITE); 2756 if (status < 0) { 2757 mlog_errno(status); 2758 goto bail_commit; 2759 } 2760 2761 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2762 di->i_dio_orphaned_slot = 0; 2763 2764 if (update_isize) { 2765 status = ocfs2_set_inode_size(handle, inode, di_bh, end); 2766 if (status) 2767 mlog_errno(status); 2768 } else 2769 ocfs2_journal_dirty(handle, di_bh); 2770 2771 bail_commit: 2772 ocfs2_commit_trans(osb, handle); 2773 2774 bail_unlock_orphan: 2775 ocfs2_inode_unlock(orphan_dir_inode, 1); 2776 inode_unlock(orphan_dir_inode); 2777 brelse(orphan_dir_bh); 2778 iput(orphan_dir_inode); 2779 2780 bail: 2781 return status; 2782 } 2783 2784 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2785 struct inode *inode, 2786 struct dentry *dentry) 2787 { 2788 int status = 0; 2789 struct buffer_head *parent_di_bh = NULL; 2790 handle_t *handle = NULL; 2791 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2792 struct ocfs2_dinode *dir_di, *di; 2793 struct inode *orphan_dir_inode = NULL; 2794 struct buffer_head *orphan_dir_bh = NULL; 2795 struct buffer_head *di_bh = NULL; 2796 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2797 2798 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, 2799 dentry->d_name.len, dentry->d_name.name, 2800 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2801 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2802 2803 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2804 if (status < 0) { 2805 if (status != -ENOENT) 2806 mlog_errno(status); 2807 return status; 2808 } 2809 2810 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2811 if (!dir_di->i_links_count) { 2812 /* can't make a file in a deleted directory. */ 2813 status = -ENOENT; 2814 goto leave; 2815 } 2816 2817 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2818 dentry->d_name.len); 2819 if (status) 2820 goto leave; 2821 2822 /* get a spot inside the dir. */ 2823 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2824 dentry->d_name.name, 2825 dentry->d_name.len, &lookup); 2826 if (status < 0) { 2827 mlog_errno(status); 2828 goto leave; 2829 } 2830 2831 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2832 ORPHAN_DIR_SYSTEM_INODE, 2833 osb->slot_num); 2834 if (!orphan_dir_inode) { 2835 status = -ENOENT; 2836 mlog_errno(status); 2837 goto leave; 2838 } 2839 2840 inode_lock(orphan_dir_inode); 2841 2842 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2843 if (status < 0) { 2844 mlog_errno(status); 2845 inode_unlock(orphan_dir_inode); 2846 iput(orphan_dir_inode); 2847 goto leave; 2848 } 2849 2850 status = ocfs2_read_inode_block(inode, &di_bh); 2851 if (status < 0) { 2852 mlog_errno(status); 2853 goto orphan_unlock; 2854 } 2855 2856 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2857 if (IS_ERR(handle)) { 2858 status = PTR_ERR(handle); 2859 handle = NULL; 2860 mlog_errno(status); 2861 goto orphan_unlock; 2862 } 2863 2864 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2865 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2866 if (status < 0) { 2867 mlog_errno(status); 2868 goto out_commit; 2869 } 2870 2871 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2872 orphan_dir_bh, false); 2873 if (status < 0) { 2874 mlog_errno(status); 2875 goto out_commit; 2876 } 2877 2878 di = (struct ocfs2_dinode *)di_bh->b_data; 2879 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); 2880 di->i_orphaned_slot = 0; 2881 set_nlink(inode, 1); 2882 ocfs2_set_links_count(di, inode->i_nlink); 2883 ocfs2_update_inode_fsync_trans(handle, inode, 1); 2884 ocfs2_journal_dirty(handle, di_bh); 2885 2886 status = ocfs2_add_entry(handle, dentry, inode, 2887 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2888 &lookup); 2889 if (status < 0) { 2890 mlog_errno(status); 2891 goto out_commit; 2892 } 2893 2894 status = ocfs2_dentry_attach_lock(dentry, inode, 2895 OCFS2_I(dir)->ip_blkno); 2896 if (status) { 2897 mlog_errno(status); 2898 goto out_commit; 2899 } 2900 2901 d_instantiate(dentry, inode); 2902 status = 0; 2903 out_commit: 2904 ocfs2_commit_trans(osb, handle); 2905 orphan_unlock: 2906 ocfs2_inode_unlock(orphan_dir_inode, 1); 2907 inode_unlock(orphan_dir_inode); 2908 iput(orphan_dir_inode); 2909 leave: 2910 2911 ocfs2_inode_unlock(dir, 1); 2912 2913 brelse(di_bh); 2914 brelse(parent_di_bh); 2915 brelse(orphan_dir_bh); 2916 2917 ocfs2_free_dir_lookup_result(&lookup); 2918 2919 if (status) 2920 mlog_errno(status); 2921 2922 return status; 2923 } 2924 2925 const struct inode_operations ocfs2_dir_iops = { 2926 .create = ocfs2_create, 2927 .lookup = ocfs2_lookup, 2928 .link = ocfs2_link, 2929 .unlink = ocfs2_unlink, 2930 .rmdir = ocfs2_unlink, 2931 .symlink = ocfs2_symlink, 2932 .mkdir = ocfs2_mkdir, 2933 .mknod = ocfs2_mknod, 2934 .rename = ocfs2_rename, 2935 .setattr = ocfs2_setattr, 2936 .getattr = ocfs2_getattr, 2937 .permission = ocfs2_permission, 2938 .listxattr = ocfs2_listxattr, 2939 .fiemap = ocfs2_fiemap, 2940 .get_inode_acl = ocfs2_iop_get_acl, 2941 .set_acl = ocfs2_iop_set_acl, 2942 .fileattr_get = ocfs2_fileattr_get, 2943 .fileattr_set = ocfs2_fileattr_set, 2944 }; 2945