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 return ERR_PTR(status); 205 206 return inode; 207 } 208 209 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb, 210 struct dentry *dentry, struct inode *inode) 211 { 212 struct ocfs2_dentry_lock *dl = dentry->d_fsdata; 213 214 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres); 215 ocfs2_lock_res_free(&dl->dl_lockres); 216 BUG_ON(dl->dl_count != 1); 217 spin_lock(&dentry_attach_lock); 218 dentry->d_fsdata = NULL; 219 spin_unlock(&dentry_attach_lock); 220 kfree(dl); 221 iput(inode); 222 } 223 224 static int ocfs2_mknod(struct mnt_idmap *idmap, 225 struct inode *dir, 226 struct dentry *dentry, 227 umode_t mode, 228 dev_t dev) 229 { 230 int status = 0; 231 struct buffer_head *parent_fe_bh = NULL; 232 handle_t *handle = NULL; 233 struct ocfs2_super *osb; 234 struct ocfs2_dinode *dirfe; 235 struct ocfs2_dinode *fe = NULL; 236 struct buffer_head *new_fe_bh = NULL; 237 struct inode *inode = NULL; 238 struct ocfs2_alloc_context *inode_ac = NULL; 239 struct ocfs2_alloc_context *data_ac = NULL; 240 struct ocfs2_alloc_context *meta_ac = NULL; 241 int want_clusters = 0; 242 int want_meta = 0; 243 int xattr_credits = 0; 244 struct ocfs2_security_xattr_info si = { 245 .enable = 1, 246 }; 247 int did_quota_inode = 0; 248 struct ocfs2_dir_lookup_result lookup = { NULL, }; 249 sigset_t oldset; 250 int did_block_signals = 0; 251 struct ocfs2_dentry_lock *dl = NULL; 252 253 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name, 254 (unsigned long long)OCFS2_I(dir)->ip_blkno, 255 (unsigned long)dev, mode); 256 257 status = dquot_initialize(dir); 258 if (status) { 259 mlog_errno(status); 260 return status; 261 } 262 263 /* get our super block */ 264 osb = OCFS2_SB(dir->i_sb); 265 266 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 267 if (status < 0) { 268 if (status != -ENOENT) 269 mlog_errno(status); 270 return status; 271 } 272 273 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) { 274 status = -EMLINK; 275 goto leave; 276 } 277 278 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 279 if (!ocfs2_read_links_count(dirfe)) { 280 /* can't make a file in a deleted directory. */ 281 status = -ENOENT; 282 goto leave; 283 } 284 285 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 286 dentry->d_name.len); 287 if (status) 288 goto leave; 289 290 /* get a spot inside the dir. */ 291 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 292 dentry->d_name.name, 293 dentry->d_name.len, &lookup); 294 if (status < 0) { 295 mlog_errno(status); 296 goto leave; 297 } 298 299 /* reserve an inode spot */ 300 status = ocfs2_reserve_new_inode(osb, &inode_ac); 301 if (status < 0) { 302 if (status != -ENOSPC) 303 mlog_errno(status); 304 goto leave; 305 } 306 307 inode = ocfs2_get_init_inode(dir, mode); 308 if (IS_ERR(inode)) { 309 status = PTR_ERR(inode); 310 inode = NULL; 311 mlog_errno(status); 312 goto leave; 313 } 314 315 /* get security xattr */ 316 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 317 if (status) { 318 if (status == -EOPNOTSUPP) 319 si.enable = 0; 320 else { 321 mlog_errno(status); 322 goto leave; 323 } 324 } 325 326 /* calculate meta data/clusters for setting security and acl xattr */ 327 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode, 328 &si, &want_clusters, 329 &xattr_credits, &want_meta); 330 if (status < 0) { 331 mlog_errno(status); 332 goto leave; 333 } 334 335 /* Reserve a cluster if creating an extent based directory. */ 336 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { 337 want_clusters += 1; 338 339 /* Dir indexing requires extra space as well */ 340 if (ocfs2_supports_indexed_dirs(osb)) 341 want_meta++; 342 } 343 344 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac); 345 if (status < 0) { 346 if (status != -ENOSPC) 347 mlog_errno(status); 348 goto leave; 349 } 350 351 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 352 if (status < 0) { 353 if (status != -ENOSPC) 354 mlog_errno(status); 355 goto leave; 356 } 357 358 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 359 S_ISDIR(mode), 360 xattr_credits)); 361 if (IS_ERR(handle)) { 362 status = PTR_ERR(handle); 363 handle = NULL; 364 mlog_errno(status); 365 goto leave; 366 } 367 368 /* Starting to change things, restart is no longer possible. */ 369 ocfs2_block_signals(&oldset); 370 did_block_signals = 1; 371 372 status = dquot_alloc_inode(inode); 373 if (status) 374 goto leave; 375 did_quota_inode = 1; 376 377 /* do the real work now. */ 378 status = ocfs2_mknod_locked(osb, dir, inode, dev, 379 &new_fe_bh, parent_fe_bh, handle, 380 inode_ac); 381 if (status < 0) { 382 mlog_errno(status); 383 goto leave; 384 } 385 386 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 387 if (S_ISDIR(mode)) { 388 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 389 new_fe_bh, data_ac, meta_ac); 390 if (status < 0) { 391 mlog_errno(status); 392 goto leave; 393 } 394 395 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir), 396 parent_fe_bh, 397 OCFS2_JOURNAL_ACCESS_WRITE); 398 if (status < 0) { 399 mlog_errno(status); 400 goto leave; 401 } 402 ocfs2_add_links_count(dirfe, 1); 403 ocfs2_journal_dirty(handle, parent_fe_bh); 404 inc_nlink(dir); 405 } 406 407 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh, 408 meta_ac, data_ac); 409 410 if (status < 0) { 411 mlog_errno(status); 412 goto roll_back; 413 } 414 415 if (si.enable) { 416 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 417 meta_ac, data_ac); 418 if (status < 0) { 419 mlog_errno(status); 420 goto roll_back; 421 } 422 } 423 424 /* 425 * Do this before adding the entry to the directory. We add 426 * also set d_op after success so that ->d_iput() will cleanup 427 * the dentry lock even if ocfs2_add_entry() fails below. 428 */ 429 status = ocfs2_dentry_attach_lock(dentry, inode, 430 OCFS2_I(dir)->ip_blkno); 431 if (status) { 432 mlog_errno(status); 433 goto roll_back; 434 } 435 436 dl = dentry->d_fsdata; 437 438 status = ocfs2_add_entry(handle, dentry, inode, 439 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 440 &lookup); 441 if (status < 0) { 442 mlog_errno(status); 443 goto roll_back; 444 } 445 446 insert_inode_hash(inode); 447 d_instantiate(dentry, inode); 448 status = 0; 449 450 roll_back: 451 if (status < 0 && S_ISDIR(mode)) { 452 ocfs2_add_links_count(dirfe, -1); 453 drop_nlink(dir); 454 } 455 456 leave: 457 if (status < 0 && did_quota_inode) 458 dquot_free_inode(inode); 459 if (handle) { 460 if (status < 0 && fe) 461 ocfs2_set_links_count(fe, 0); 462 ocfs2_commit_trans(osb, handle); 463 } 464 465 ocfs2_inode_unlock(dir, 1); 466 if (did_block_signals) 467 ocfs2_unblock_signals(&oldset); 468 469 brelse(new_fe_bh); 470 brelse(parent_fe_bh); 471 kfree(si.value); 472 473 ocfs2_free_dir_lookup_result(&lookup); 474 475 if (inode_ac) 476 ocfs2_free_alloc_context(inode_ac); 477 478 if (data_ac) 479 ocfs2_free_alloc_context(data_ac); 480 481 if (meta_ac) 482 ocfs2_free_alloc_context(meta_ac); 483 484 /* 485 * We should call iput after the i_rwsem of the bitmap been 486 * unlocked in ocfs2_free_alloc_context, or the 487 * ocfs2_delete_inode will mutex_lock again. 488 */ 489 if ((status < 0) && inode) { 490 if (dl) 491 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 492 493 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 494 clear_nlink(inode); 495 iput(inode); 496 } 497 498 if (status) 499 mlog_errno(status); 500 501 return status; 502 } 503 504 static int __ocfs2_mknod_locked(struct inode *dir, 505 struct inode *inode, 506 dev_t dev, 507 struct buffer_head **new_fe_bh, 508 struct buffer_head *parent_fe_bh, 509 handle_t *handle, 510 struct ocfs2_alloc_context *inode_ac, 511 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit) 512 { 513 int status = 0; 514 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 515 struct ocfs2_dinode *fe = NULL; 516 struct ocfs2_extent_list *fel; 517 u16 feat; 518 struct ocfs2_inode_info *oi = OCFS2_I(inode); 519 struct timespec64 ts; 520 521 *new_fe_bh = NULL; 522 523 /* populate as many fields early on as possible - many of 524 * these are used by the support functions here and in 525 * callers. */ 526 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 527 oi->ip_blkno = fe_blkno; 528 spin_lock(&osb->osb_lock); 529 inode->i_generation = osb->s_next_generation++; 530 spin_unlock(&osb->osb_lock); 531 532 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 533 if (!*new_fe_bh) { 534 status = -ENOMEM; 535 mlog_errno(status); 536 goto leave; 537 } 538 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh); 539 540 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 541 *new_fe_bh, 542 OCFS2_JOURNAL_ACCESS_CREATE); 543 if (status < 0) { 544 mlog_errno(status); 545 goto leave; 546 } 547 548 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 549 memset(fe, 0, osb->sb->s_blocksize); 550 551 fe->i_generation = cpu_to_le32(inode->i_generation); 552 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 553 fe->i_blkno = cpu_to_le64(fe_blkno); 554 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc); 555 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 556 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); 557 fe->i_uid = cpu_to_le32(i_uid_read(inode)); 558 fe->i_gid = cpu_to_le32(i_gid_read(inode)); 559 fe->i_mode = cpu_to_le16(inode->i_mode); 560 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 561 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 562 563 ocfs2_set_links_count(fe, inode->i_nlink); 564 565 fe->i_last_eb_blk = 0; 566 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 567 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL); 568 ktime_get_real_ts64(&ts); 569 fe->i_atime = fe->i_ctime = fe->i_mtime = 570 cpu_to_le64(ts.tv_sec); 571 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 572 cpu_to_le32(ts.tv_nsec); 573 fe->i_dtime = 0; 574 575 /* 576 * If supported, directories start with inline data. If inline 577 * isn't supported, but indexing is, we start them as indexed. 578 */ 579 feat = le16_to_cpu(fe->i_dyn_features); 580 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) { 581 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); 582 583 fe->id2.i_data.id_count = cpu_to_le16( 584 ocfs2_max_inline_data_with_xattr(osb->sb, fe)); 585 } else { 586 fel = &fe->id2.i_list; 587 fel->l_tree_depth = 0; 588 fel->l_next_free_rec = 0; 589 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 590 } 591 592 ocfs2_journal_dirty(handle, *new_fe_bh); 593 594 ocfs2_populate_inode(inode, fe, 1); 595 ocfs2_ci_set_new(osb, INODE_CACHE(inode)); 596 if (!ocfs2_mount_local(osb)) { 597 status = ocfs2_create_new_inode_locks(inode); 598 if (status < 0) 599 mlog_errno(status); 600 } 601 602 ocfs2_update_inode_fsync_trans(handle, inode, 1); 603 604 leave: 605 if (status < 0) { 606 if (*new_fe_bh) { 607 brelse(*new_fe_bh); 608 *new_fe_bh = NULL; 609 } 610 } 611 612 if (status) 613 mlog_errno(status); 614 return status; 615 } 616 617 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 618 struct inode *dir, 619 struct inode *inode, 620 dev_t dev, 621 struct buffer_head **new_fe_bh, 622 struct buffer_head *parent_fe_bh, 623 handle_t *handle, 624 struct ocfs2_alloc_context *inode_ac) 625 { 626 int status = 0; 627 u64 suballoc_loc, fe_blkno = 0; 628 u16 suballoc_bit; 629 630 *new_fe_bh = NULL; 631 632 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh, 633 inode_ac, &suballoc_loc, 634 &suballoc_bit, &fe_blkno); 635 if (status < 0) { 636 mlog_errno(status); 637 return status; 638 } 639 640 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, 641 parent_fe_bh, handle, inode_ac, 642 fe_blkno, suballoc_loc, suballoc_bit); 643 } 644 645 static int ocfs2_mkdir(struct mnt_idmap *idmap, 646 struct inode *dir, 647 struct dentry *dentry, 648 umode_t mode) 649 { 650 int ret; 651 652 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, 653 OCFS2_I(dir)->ip_blkno, mode); 654 ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFDIR, 0); 655 if (ret) 656 mlog_errno(ret); 657 658 return ret; 659 } 660 661 static int ocfs2_create(struct mnt_idmap *idmap, 662 struct inode *dir, 663 struct dentry *dentry, 664 umode_t mode, 665 bool excl) 666 { 667 int ret; 668 669 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name, 670 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode); 671 ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFREG, 0); 672 if (ret) 673 mlog_errno(ret); 674 675 return ret; 676 } 677 678 static int ocfs2_link(struct dentry *old_dentry, 679 struct inode *dir, 680 struct dentry *dentry) 681 { 682 handle_t *handle; 683 struct inode *inode = d_inode(old_dentry); 684 struct inode *old_dir = d_inode(old_dentry->d_parent); 685 int err; 686 struct buffer_head *fe_bh = NULL; 687 struct buffer_head *old_dir_bh = NULL; 688 struct buffer_head *parent_fe_bh = NULL; 689 struct ocfs2_dinode *fe = NULL; 690 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 691 struct ocfs2_dir_lookup_result lookup = { NULL, }; 692 sigset_t oldset; 693 u64 old_de_ino; 694 695 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno, 696 old_dentry->d_name.len, old_dentry->d_name.name, 697 dentry->d_name.len, dentry->d_name.name); 698 699 if (S_ISDIR(inode->i_mode)) 700 return -EPERM; 701 702 err = dquot_initialize(dir); 703 if (err) { 704 mlog_errno(err); 705 return err; 706 } 707 708 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 709 &parent_fe_bh, dir, 0); 710 if (err < 0) { 711 if (err != -ENOENT) 712 mlog_errno(err); 713 return err; 714 } 715 716 /* make sure both dirs have bhs 717 * get an extra ref on old_dir_bh if old==new */ 718 if (!parent_fe_bh) { 719 if (old_dir_bh) { 720 parent_fe_bh = old_dir_bh; 721 get_bh(parent_fe_bh); 722 } else { 723 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str); 724 err = -EIO; 725 goto out; 726 } 727 } 728 729 if (!dir->i_nlink) { 730 err = -ENOENT; 731 goto out; 732 } 733 734 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 735 old_dentry->d_name.len, &old_de_ino); 736 if (err) { 737 err = -ENOENT; 738 goto out; 739 } 740 741 /* 742 * Check whether another node removed the source inode while we 743 * were in the vfs. 744 */ 745 if (old_de_ino != OCFS2_I(inode)->ip_blkno) { 746 err = -ENOENT; 747 goto out; 748 } 749 750 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 751 dentry->d_name.len); 752 if (err) 753 goto out; 754 755 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 756 dentry->d_name.name, 757 dentry->d_name.len, &lookup); 758 if (err < 0) { 759 mlog_errno(err); 760 goto out; 761 } 762 763 err = ocfs2_inode_lock(inode, &fe_bh, 1); 764 if (err < 0) { 765 if (err != -ENOENT) 766 mlog_errno(err); 767 goto out; 768 } 769 770 fe = (struct ocfs2_dinode *) fe_bh->b_data; 771 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { 772 err = -EMLINK; 773 goto out_unlock_inode; 774 } 775 776 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); 777 if (IS_ERR(handle)) { 778 err = PTR_ERR(handle); 779 handle = NULL; 780 mlog_errno(err); 781 goto out_unlock_inode; 782 } 783 784 /* Starting to change things, restart is no longer possible. */ 785 ocfs2_block_signals(&oldset); 786 787 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 788 OCFS2_JOURNAL_ACCESS_WRITE); 789 if (err < 0) { 790 mlog_errno(err); 791 goto out_commit; 792 } 793 794 inc_nlink(inode); 795 inode->i_ctime = current_time(inode); 796 ocfs2_set_links_count(fe, inode->i_nlink); 797 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 798 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 799 ocfs2_journal_dirty(handle, fe_bh); 800 801 err = ocfs2_add_entry(handle, dentry, inode, 802 OCFS2_I(inode)->ip_blkno, 803 parent_fe_bh, &lookup); 804 if (err) { 805 ocfs2_add_links_count(fe, -1); 806 drop_nlink(inode); 807 mlog_errno(err); 808 goto out_commit; 809 } 810 811 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 812 if (err) { 813 mlog_errno(err); 814 goto out_commit; 815 } 816 817 ihold(inode); 818 d_instantiate(dentry, inode); 819 820 out_commit: 821 ocfs2_commit_trans(osb, handle); 822 ocfs2_unblock_signals(&oldset); 823 out_unlock_inode: 824 ocfs2_inode_unlock(inode, 1); 825 826 out: 827 ocfs2_double_unlock(old_dir, dir); 828 829 brelse(fe_bh); 830 brelse(parent_fe_bh); 831 brelse(old_dir_bh); 832 833 ocfs2_free_dir_lookup_result(&lookup); 834 835 if (err) 836 mlog_errno(err); 837 838 return err; 839 } 840 841 /* 842 * Takes and drops an exclusive lock on the given dentry. This will 843 * force other nodes to drop it. 844 */ 845 static int ocfs2_remote_dentry_delete(struct dentry *dentry) 846 { 847 int ret; 848 849 ret = ocfs2_dentry_lock(dentry, 1); 850 if (ret) 851 mlog_errno(ret); 852 else 853 ocfs2_dentry_unlock(dentry, 1); 854 855 return ret; 856 } 857 858 static inline int ocfs2_inode_is_unlinkable(struct inode *inode) 859 { 860 if (S_ISDIR(inode->i_mode)) { 861 if (inode->i_nlink == 2) 862 return 1; 863 return 0; 864 } 865 866 if (inode->i_nlink == 1) 867 return 1; 868 return 0; 869 } 870 871 static int ocfs2_unlink(struct inode *dir, 872 struct dentry *dentry) 873 { 874 int status; 875 int child_locked = 0; 876 bool is_unlinkable = false; 877 struct inode *inode = d_inode(dentry); 878 struct inode *orphan_dir = NULL; 879 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 880 u64 blkno; 881 struct ocfs2_dinode *fe = NULL; 882 struct buffer_head *fe_bh = NULL; 883 struct buffer_head *parent_node_bh = NULL; 884 handle_t *handle = NULL; 885 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 886 struct ocfs2_dir_lookup_result lookup = { NULL, }; 887 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 888 889 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, 890 dentry->d_name.name, 891 (unsigned long long)OCFS2_I(dir)->ip_blkno, 892 (unsigned long long)OCFS2_I(inode)->ip_blkno); 893 894 status = dquot_initialize(dir); 895 if (status) { 896 mlog_errno(status); 897 return status; 898 } 899 900 BUG_ON(d_inode(dentry->d_parent) != dir); 901 902 if (inode == osb->root_inode) 903 return -EPERM; 904 905 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 906 OI_LS_PARENT); 907 if (status < 0) { 908 if (status != -ENOENT) 909 mlog_errno(status); 910 return status; 911 } 912 913 status = ocfs2_find_files_on_disk(dentry->d_name.name, 914 dentry->d_name.len, &blkno, dir, 915 &lookup); 916 if (status < 0) { 917 if (status != -ENOENT) 918 mlog_errno(status); 919 goto leave; 920 } 921 922 if (OCFS2_I(inode)->ip_blkno != blkno) { 923 status = -ENOENT; 924 925 trace_ocfs2_unlink_noent( 926 (unsigned long long)OCFS2_I(inode)->ip_blkno, 927 (unsigned long long)blkno, 928 OCFS2_I(inode)->ip_flags); 929 goto leave; 930 } 931 932 status = ocfs2_inode_lock(inode, &fe_bh, 1); 933 if (status < 0) { 934 if (status != -ENOENT) 935 mlog_errno(status); 936 goto leave; 937 } 938 child_locked = 1; 939 940 if (S_ISDIR(inode->i_mode)) { 941 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 942 status = -ENOTEMPTY; 943 goto leave; 944 } 945 } 946 947 status = ocfs2_remote_dentry_delete(dentry); 948 if (status < 0) { 949 /* This remote delete should succeed under all normal 950 * circumstances. */ 951 mlog_errno(status); 952 goto leave; 953 } 954 955 if (ocfs2_inode_is_unlinkable(inode)) { 956 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 957 OCFS2_I(inode)->ip_blkno, 958 orphan_name, &orphan_insert, 959 false); 960 if (status < 0) { 961 mlog_errno(status); 962 goto leave; 963 } 964 is_unlinkable = true; 965 } 966 967 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 968 if (IS_ERR(handle)) { 969 status = PTR_ERR(handle); 970 handle = NULL; 971 mlog_errno(status); 972 goto leave; 973 } 974 975 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 976 OCFS2_JOURNAL_ACCESS_WRITE); 977 if (status < 0) { 978 mlog_errno(status); 979 goto leave; 980 } 981 982 fe = (struct ocfs2_dinode *) fe_bh->b_data; 983 984 /* delete the name from the parent dir */ 985 status = ocfs2_delete_entry(handle, dir, &lookup); 986 if (status < 0) { 987 mlog_errno(status); 988 goto leave; 989 } 990 991 if (S_ISDIR(inode->i_mode)) 992 drop_nlink(inode); 993 drop_nlink(inode); 994 ocfs2_set_links_count(fe, inode->i_nlink); 995 ocfs2_journal_dirty(handle, fe_bh); 996 997 dir->i_ctime = dir->i_mtime = current_time(dir); 998 if (S_ISDIR(inode->i_mode)) 999 drop_nlink(dir); 1000 1001 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 1002 if (status < 0) { 1003 mlog_errno(status); 1004 if (S_ISDIR(inode->i_mode)) 1005 inc_nlink(dir); 1006 goto leave; 1007 } 1008 1009 if (is_unlinkable) { 1010 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, 1011 orphan_name, &orphan_insert, orphan_dir, false); 1012 if (status < 0) 1013 mlog_errno(status); 1014 } 1015 1016 leave: 1017 if (handle) 1018 ocfs2_commit_trans(osb, handle); 1019 1020 if (orphan_dir) { 1021 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1022 ocfs2_inode_unlock(orphan_dir, 1); 1023 inode_unlock(orphan_dir); 1024 iput(orphan_dir); 1025 } 1026 1027 if (child_locked) 1028 ocfs2_inode_unlock(inode, 1); 1029 1030 ocfs2_inode_unlock(dir, 1); 1031 1032 brelse(fe_bh); 1033 brelse(parent_node_bh); 1034 1035 ocfs2_free_dir_lookup_result(&orphan_insert); 1036 ocfs2_free_dir_lookup_result(&lookup); 1037 1038 if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) 1039 mlog_errno(status); 1040 1041 return status; 1042 } 1043 1044 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, 1045 u64 src_inode_no, u64 dest_inode_no) 1046 { 1047 int ret = 0, i = 0; 1048 u64 parent_inode_no = 0; 1049 u64 child_inode_no = src_inode_no; 1050 struct inode *child_inode; 1051 1052 #define MAX_LOOKUP_TIMES 32 1053 while (1) { 1054 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); 1055 if (IS_ERR(child_inode)) { 1056 ret = PTR_ERR(child_inode); 1057 break; 1058 } 1059 1060 ret = ocfs2_inode_lock(child_inode, NULL, 0); 1061 if (ret < 0) { 1062 iput(child_inode); 1063 if (ret != -ENOENT) 1064 mlog_errno(ret); 1065 break; 1066 } 1067 1068 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, 1069 &parent_inode_no); 1070 ocfs2_inode_unlock(child_inode, 0); 1071 iput(child_inode); 1072 if (ret < 0) { 1073 ret = -ENOENT; 1074 break; 1075 } 1076 1077 if (parent_inode_no == dest_inode_no) { 1078 ret = 1; 1079 break; 1080 } 1081 1082 if (parent_inode_no == osb->root_inode->i_ino) { 1083 ret = 0; 1084 break; 1085 } 1086 1087 child_inode_no = parent_inode_no; 1088 1089 if (++i >= MAX_LOOKUP_TIMES) { 1090 mlog_ratelimited(ML_NOTICE, "max lookup times reached, " 1091 "filesystem may have nested directories, " 1092 "src inode: %llu, dest inode: %llu.\n", 1093 (unsigned long long)src_inode_no, 1094 (unsigned long long)dest_inode_no); 1095 ret = 0; 1096 break; 1097 } 1098 } 1099 1100 return ret; 1101 } 1102 1103 /* 1104 * The only place this should be used is rename and link! 1105 * if they have the same id, then the 1st one is the only one locked. 1106 */ 1107 static int ocfs2_double_lock(struct ocfs2_super *osb, 1108 struct buffer_head **bh1, 1109 struct inode *inode1, 1110 struct buffer_head **bh2, 1111 struct inode *inode2, 1112 int rename) 1113 { 1114 int status; 1115 int inode1_is_ancestor, inode2_is_ancestor; 1116 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 1117 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 1118 1119 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 1120 (unsigned long long)oi2->ip_blkno); 1121 1122 if (*bh1) 1123 *bh1 = NULL; 1124 if (*bh2) 1125 *bh2 = NULL; 1126 1127 /* we always want to lock the one with the lower lockid first. 1128 * and if they are nested, we lock ancestor first */ 1129 if (oi1->ip_blkno != oi2->ip_blkno) { 1130 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, 1131 oi1->ip_blkno); 1132 if (inode1_is_ancestor < 0) { 1133 status = inode1_is_ancestor; 1134 goto bail; 1135 } 1136 1137 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, 1138 oi2->ip_blkno); 1139 if (inode2_is_ancestor < 0) { 1140 status = inode2_is_ancestor; 1141 goto bail; 1142 } 1143 1144 if ((inode1_is_ancestor == 1) || 1145 (oi1->ip_blkno < oi2->ip_blkno && 1146 inode2_is_ancestor == 0)) { 1147 /* switch id1 and id2 around */ 1148 swap(bh2, bh1); 1149 swap(inode2, inode1); 1150 } 1151 /* lock id2 */ 1152 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 1153 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); 1154 if (status < 0) { 1155 if (status != -ENOENT) 1156 mlog_errno(status); 1157 goto bail; 1158 } 1159 } 1160 1161 /* lock id1 */ 1162 status = ocfs2_inode_lock_nested(inode1, bh1, 1, 1163 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 1164 if (status < 0) { 1165 /* 1166 * An error return must mean that no cluster locks 1167 * were held on function exit. 1168 */ 1169 if (oi1->ip_blkno != oi2->ip_blkno) { 1170 ocfs2_inode_unlock(inode2, 1); 1171 brelse(*bh2); 1172 *bh2 = NULL; 1173 } 1174 1175 if (status != -ENOENT) 1176 mlog_errno(status); 1177 } 1178 1179 trace_ocfs2_double_lock_end( 1180 (unsigned long long)oi1->ip_blkno, 1181 (unsigned long long)oi2->ip_blkno); 1182 1183 bail: 1184 if (status) 1185 mlog_errno(status); 1186 return status; 1187 } 1188 1189 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1190 { 1191 ocfs2_inode_unlock(inode1, 1); 1192 1193 if (inode1 != inode2) 1194 ocfs2_inode_unlock(inode2, 1); 1195 } 1196 1197 static int ocfs2_rename(struct mnt_idmap *idmap, 1198 struct inode *old_dir, 1199 struct dentry *old_dentry, 1200 struct inode *new_dir, 1201 struct dentry *new_dentry, 1202 unsigned int flags) 1203 { 1204 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1205 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1206 struct inode *old_inode = d_inode(old_dentry); 1207 struct inode *new_inode = d_inode(new_dentry); 1208 struct inode *orphan_dir = NULL; 1209 struct ocfs2_dinode *newfe = NULL; 1210 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1211 struct buffer_head *newfe_bh = NULL; 1212 struct buffer_head *old_inode_bh = NULL; 1213 struct ocfs2_super *osb = NULL; 1214 u64 newfe_blkno, old_de_ino; 1215 handle_t *handle = NULL; 1216 struct buffer_head *old_dir_bh = NULL; 1217 struct buffer_head *new_dir_bh = NULL; 1218 u32 old_dir_nlink = old_dir->i_nlink; 1219 struct ocfs2_dinode *old_di; 1220 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1221 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1222 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1223 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1224 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1225 bool should_add_orphan = false; 1226 1227 if (flags) 1228 return -EINVAL; 1229 1230 /* At some point it might be nice to break this function up a 1231 * bit. */ 1232 1233 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, 1234 old_dentry->d_name.len, old_dentry->d_name.name, 1235 new_dentry->d_name.len, new_dentry->d_name.name); 1236 1237 status = dquot_initialize(old_dir); 1238 if (status) { 1239 mlog_errno(status); 1240 goto bail; 1241 } 1242 status = dquot_initialize(new_dir); 1243 if (status) { 1244 mlog_errno(status); 1245 goto bail; 1246 } 1247 1248 osb = OCFS2_SB(old_dir->i_sb); 1249 1250 if (new_inode) { 1251 if (!igrab(new_inode)) 1252 BUG(); 1253 } 1254 1255 /* Assume a directory hierarchy thusly: 1256 * a/b/c 1257 * a/d 1258 * a,b,c, and d are all directories. 1259 * 1260 * from cwd of 'a' on both nodes: 1261 * node1: mv b/c d 1262 * node2: mv d b/c 1263 * 1264 * And that's why, just like the VFS, we need a file system 1265 * rename lock. */ 1266 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1267 status = ocfs2_rename_lock(osb); 1268 if (status < 0) { 1269 mlog_errno(status); 1270 goto bail; 1271 } 1272 rename_lock = 1; 1273 1274 /* here we cannot guarantee the inodes haven't just been 1275 * changed, so check if they are nested again */ 1276 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, 1277 old_inode->i_ino); 1278 if (status < 0) { 1279 mlog_errno(status); 1280 goto bail; 1281 } else if (status == 1) { 1282 status = -EPERM; 1283 trace_ocfs2_rename_not_permitted( 1284 (unsigned long long)old_inode->i_ino, 1285 (unsigned long long)new_dir->i_ino); 1286 goto bail; 1287 } 1288 } 1289 1290 /* if old and new are the same, this'll just do one lock. */ 1291 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1292 &new_dir_bh, new_dir, 1); 1293 if (status < 0) { 1294 mlog_errno(status); 1295 goto bail; 1296 } 1297 parents_locked = 1; 1298 1299 if (!new_dir->i_nlink) { 1300 status = -EACCES; 1301 goto bail; 1302 } 1303 1304 /* make sure both dirs have bhs 1305 * get an extra ref on old_dir_bh if old==new */ 1306 if (!new_dir_bh) { 1307 if (old_dir_bh) { 1308 new_dir_bh = old_dir_bh; 1309 get_bh(new_dir_bh); 1310 } else { 1311 mlog(ML_ERROR, "no old_dir_bh!\n"); 1312 status = -EIO; 1313 goto bail; 1314 } 1315 } 1316 1317 /* 1318 * Aside from allowing a meta data update, the locking here 1319 * also ensures that the downconvert thread on other nodes 1320 * won't have to concurrently downconvert the inode and the 1321 * dentry locks. 1322 */ 1323 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1324 OI_LS_PARENT); 1325 if (status < 0) { 1326 if (status != -ENOENT) 1327 mlog_errno(status); 1328 goto bail; 1329 } 1330 old_child_locked = 1; 1331 1332 status = ocfs2_remote_dentry_delete(old_dentry); 1333 if (status < 0) { 1334 mlog_errno(status); 1335 goto bail; 1336 } 1337 1338 if (S_ISDIR(old_inode->i_mode)) { 1339 u64 old_inode_parent; 1340 1341 update_dot_dot = 1; 1342 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1343 old_inode, 1344 &old_inode_dot_dot_res); 1345 if (status) { 1346 status = -EIO; 1347 goto bail; 1348 } 1349 1350 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1351 status = -EIO; 1352 goto bail; 1353 } 1354 1355 if (!new_inode && new_dir != old_dir && 1356 new_dir->i_nlink >= ocfs2_link_max(osb)) { 1357 status = -EMLINK; 1358 goto bail; 1359 } 1360 } 1361 1362 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1363 old_dentry->d_name.len, 1364 &old_de_ino); 1365 if (status) { 1366 status = -ENOENT; 1367 goto bail; 1368 } 1369 1370 /* 1371 * Check for inode number is _not_ due to possible IO errors. 1372 * We might rmdir the source, keep it as pwd of some process 1373 * and merrily kill the link to whatever was created under the 1374 * same name. Goodbye sticky bit ;-< 1375 */ 1376 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1377 status = -ENOENT; 1378 goto bail; 1379 } 1380 1381 /* check if the target already exists (in which case we need 1382 * to delete it */ 1383 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1384 new_dentry->d_name.len, 1385 &newfe_blkno, new_dir, 1386 &target_lookup_res); 1387 /* The only error we allow here is -ENOENT because the new 1388 * file not existing is perfectly valid. */ 1389 if ((status < 0) && (status != -ENOENT)) { 1390 /* If we cannot find the file specified we should just */ 1391 /* return the error... */ 1392 mlog_errno(status); 1393 goto bail; 1394 } 1395 if (status == 0) 1396 target_exists = 1; 1397 1398 if (!target_exists && new_inode) { 1399 /* 1400 * Target was unlinked by another node while we were 1401 * waiting to get to ocfs2_rename(). There isn't 1402 * anything we can do here to help the situation, so 1403 * bubble up the appropriate error. 1404 */ 1405 status = -ENOENT; 1406 goto bail; 1407 } 1408 1409 /* In case we need to overwrite an existing file, we blow it 1410 * away first */ 1411 if (target_exists) { 1412 /* VFS didn't think there existed an inode here, but 1413 * someone else in the cluster must have raced our 1414 * rename to create one. Today we error cleanly, in 1415 * the future we should consider calling iget to build 1416 * a new struct inode for this entry. */ 1417 if (!new_inode) { 1418 status = -EACCES; 1419 1420 trace_ocfs2_rename_target_exists(new_dentry->d_name.len, 1421 new_dentry->d_name.name); 1422 goto bail; 1423 } 1424 1425 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1426 status = -EACCES; 1427 1428 trace_ocfs2_rename_disagree( 1429 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1430 (unsigned long long)newfe_blkno, 1431 OCFS2_I(new_inode)->ip_flags); 1432 goto bail; 1433 } 1434 1435 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1436 if (status < 0) { 1437 if (status != -ENOENT) 1438 mlog_errno(status); 1439 goto bail; 1440 } 1441 new_child_locked = 1; 1442 1443 status = ocfs2_remote_dentry_delete(new_dentry); 1444 if (status < 0) { 1445 mlog_errno(status); 1446 goto bail; 1447 } 1448 1449 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1450 1451 trace_ocfs2_rename_over_existing( 1452 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1453 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1454 1455 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1456 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1457 OCFS2_I(new_inode)->ip_blkno, 1458 orphan_name, &orphan_insert, 1459 false); 1460 if (status < 0) { 1461 mlog_errno(status); 1462 goto bail; 1463 } 1464 should_add_orphan = true; 1465 } 1466 } else { 1467 BUG_ON(d_inode(new_dentry->d_parent) != new_dir); 1468 1469 status = ocfs2_check_dir_for_entry(new_dir, 1470 new_dentry->d_name.name, 1471 new_dentry->d_name.len); 1472 if (status) 1473 goto bail; 1474 1475 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1476 new_dentry->d_name.name, 1477 new_dentry->d_name.len, 1478 &target_insert); 1479 if (status < 0) { 1480 mlog_errno(status); 1481 goto bail; 1482 } 1483 } 1484 1485 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1486 if (IS_ERR(handle)) { 1487 status = PTR_ERR(handle); 1488 handle = NULL; 1489 mlog_errno(status); 1490 goto bail; 1491 } 1492 1493 if (target_exists) { 1494 if (S_ISDIR(new_inode->i_mode)) { 1495 if (new_inode->i_nlink != 2 || 1496 !ocfs2_empty_dir(new_inode)) { 1497 status = -ENOTEMPTY; 1498 goto bail; 1499 } 1500 } 1501 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1502 newfe_bh, 1503 OCFS2_JOURNAL_ACCESS_WRITE); 1504 if (status < 0) { 1505 mlog_errno(status); 1506 goto bail; 1507 } 1508 1509 /* change the dirent to point to the correct inode */ 1510 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1511 old_inode); 1512 if (status < 0) { 1513 mlog_errno(status); 1514 goto bail; 1515 } 1516 inode_inc_iversion(new_dir); 1517 1518 if (S_ISDIR(new_inode->i_mode)) 1519 ocfs2_set_links_count(newfe, 0); 1520 else 1521 ocfs2_add_links_count(newfe, -1); 1522 ocfs2_journal_dirty(handle, newfe_bh); 1523 if (should_add_orphan) { 1524 status = ocfs2_orphan_add(osb, handle, new_inode, 1525 newfe_bh, orphan_name, 1526 &orphan_insert, orphan_dir, false); 1527 if (status < 0) { 1528 mlog_errno(status); 1529 goto bail; 1530 } 1531 } 1532 } else { 1533 /* if the name was not found in new_dir, add it now */ 1534 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1535 OCFS2_I(old_inode)->ip_blkno, 1536 new_dir_bh, &target_insert); 1537 } 1538 1539 old_inode->i_ctime = current_time(old_inode); 1540 mark_inode_dirty(old_inode); 1541 1542 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1543 old_inode_bh, 1544 OCFS2_JOURNAL_ACCESS_WRITE); 1545 if (status >= 0) { 1546 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1547 1548 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); 1549 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); 1550 ocfs2_journal_dirty(handle, old_inode_bh); 1551 } else 1552 mlog_errno(status); 1553 1554 /* 1555 * Now that the name has been added to new_dir, remove the old name. 1556 * 1557 * We don't keep any directory entry context around until now 1558 * because the insert might have changed the type of directory 1559 * we're dealing with. 1560 */ 1561 status = ocfs2_find_entry(old_dentry->d_name.name, 1562 old_dentry->d_name.len, old_dir, 1563 &old_entry_lookup); 1564 if (status) { 1565 if (!is_journal_aborted(osb->journal->j_journal)) { 1566 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1567 "is not deleted.", 1568 new_dentry->d_name.len, new_dentry->d_name.name, 1569 old_dentry->d_name.len, old_dentry->d_name.name); 1570 } 1571 goto bail; 1572 } 1573 1574 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1575 if (status < 0) { 1576 mlog_errno(status); 1577 if (!is_journal_aborted(osb->journal->j_journal)) { 1578 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1579 "is not deleted.", 1580 new_dentry->d_name.len, new_dentry->d_name.name, 1581 old_dentry->d_name.len, old_dentry->d_name.name); 1582 } 1583 goto bail; 1584 } 1585 1586 if (new_inode) { 1587 drop_nlink(new_inode); 1588 new_inode->i_ctime = current_time(new_inode); 1589 } 1590 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir); 1591 1592 if (update_dot_dot) { 1593 status = ocfs2_update_entry(old_inode, handle, 1594 &old_inode_dot_dot_res, new_dir); 1595 drop_nlink(old_dir); 1596 if (new_inode) { 1597 drop_nlink(new_inode); 1598 } else { 1599 inc_nlink(new_dir); 1600 mark_inode_dirty(new_dir); 1601 } 1602 } 1603 mark_inode_dirty(old_dir); 1604 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1605 if (new_inode) { 1606 mark_inode_dirty(new_inode); 1607 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1608 } 1609 1610 if (old_dir != new_dir) { 1611 /* Keep the same times on both directories.*/ 1612 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; 1613 1614 /* 1615 * This will also pick up the i_nlink change from the 1616 * block above. 1617 */ 1618 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1619 } 1620 1621 if (old_dir_nlink != old_dir->i_nlink) { 1622 if (!old_dir_bh) { 1623 mlog(ML_ERROR, "need to change nlink for old dir " 1624 "%llu from %d to %d but bh is NULL!\n", 1625 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1626 (int)old_dir_nlink, old_dir->i_nlink); 1627 } else { 1628 struct ocfs2_dinode *fe; 1629 status = ocfs2_journal_access_di(handle, 1630 INODE_CACHE(old_dir), 1631 old_dir_bh, 1632 OCFS2_JOURNAL_ACCESS_WRITE); 1633 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1634 ocfs2_set_links_count(fe, old_dir->i_nlink); 1635 ocfs2_journal_dirty(handle, old_dir_bh); 1636 } 1637 } 1638 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1639 status = 0; 1640 bail: 1641 if (handle) 1642 ocfs2_commit_trans(osb, handle); 1643 1644 if (orphan_dir) { 1645 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1646 ocfs2_inode_unlock(orphan_dir, 1); 1647 inode_unlock(orphan_dir); 1648 iput(orphan_dir); 1649 } 1650 1651 if (new_child_locked) 1652 ocfs2_inode_unlock(new_inode, 1); 1653 1654 if (old_child_locked) 1655 ocfs2_inode_unlock(old_inode, 1); 1656 1657 if (parents_locked) 1658 ocfs2_double_unlock(old_dir, new_dir); 1659 1660 if (rename_lock) 1661 ocfs2_rename_unlock(osb); 1662 1663 if (new_inode) 1664 sync_mapping_buffers(old_inode->i_mapping); 1665 1666 iput(new_inode); 1667 1668 ocfs2_free_dir_lookup_result(&target_lookup_res); 1669 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1670 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1671 ocfs2_free_dir_lookup_result(&orphan_insert); 1672 ocfs2_free_dir_lookup_result(&target_insert); 1673 1674 brelse(newfe_bh); 1675 brelse(old_inode_bh); 1676 brelse(old_dir_bh); 1677 brelse(new_dir_bh); 1678 1679 if (status) 1680 mlog_errno(status); 1681 1682 return status; 1683 } 1684 1685 /* 1686 * we expect i_size = strlen(symname). Copy symname into the file 1687 * data, including the null terminator. 1688 */ 1689 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1690 handle_t *handle, 1691 struct inode *inode, 1692 const char *symname) 1693 { 1694 struct buffer_head **bhs = NULL; 1695 const char *c; 1696 struct super_block *sb = osb->sb; 1697 u64 p_blkno, p_blocks; 1698 int virtual, blocks, status, i, bytes_left; 1699 1700 bytes_left = i_size_read(inode) + 1; 1701 /* we can't trust i_blocks because we're actually going to 1702 * write i_size + 1 bytes. */ 1703 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1704 1705 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, 1706 i_size_read(inode), blocks); 1707 1708 /* Sanity check -- make sure we're going to fit. */ 1709 if (bytes_left > 1710 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1711 status = -EIO; 1712 mlog_errno(status); 1713 goto bail; 1714 } 1715 1716 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1717 if (!bhs) { 1718 status = -ENOMEM; 1719 mlog_errno(status); 1720 goto bail; 1721 } 1722 1723 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1724 NULL); 1725 if (status < 0) { 1726 mlog_errno(status); 1727 goto bail; 1728 } 1729 1730 /* links can never be larger than one cluster so we know this 1731 * is all going to be contiguous, but do a sanity check 1732 * anyway. */ 1733 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1734 status = -EIO; 1735 mlog_errno(status); 1736 goto bail; 1737 } 1738 1739 virtual = 0; 1740 while(bytes_left > 0) { 1741 c = &symname[virtual * sb->s_blocksize]; 1742 1743 bhs[virtual] = sb_getblk(sb, p_blkno); 1744 if (!bhs[virtual]) { 1745 status = -ENOMEM; 1746 mlog_errno(status); 1747 goto bail; 1748 } 1749 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1750 bhs[virtual]); 1751 1752 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1753 bhs[virtual], 1754 OCFS2_JOURNAL_ACCESS_CREATE); 1755 if (status < 0) { 1756 mlog_errno(status); 1757 goto bail; 1758 } 1759 1760 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1761 1762 memcpy(bhs[virtual]->b_data, c, 1763 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1764 bytes_left); 1765 1766 ocfs2_journal_dirty(handle, bhs[virtual]); 1767 1768 virtual++; 1769 p_blkno++; 1770 bytes_left -= sb->s_blocksize; 1771 } 1772 1773 status = 0; 1774 bail: 1775 1776 if (bhs) { 1777 for(i = 0; i < blocks; i++) 1778 brelse(bhs[i]); 1779 kfree(bhs); 1780 } 1781 1782 if (status) 1783 mlog_errno(status); 1784 return status; 1785 } 1786 1787 static int ocfs2_symlink(struct mnt_idmap *idmap, 1788 struct inode *dir, 1789 struct dentry *dentry, 1790 const char *symname) 1791 { 1792 int status, l, credits; 1793 u64 newsize; 1794 struct ocfs2_super *osb = NULL; 1795 struct inode *inode = NULL; 1796 struct super_block *sb; 1797 struct buffer_head *new_fe_bh = NULL; 1798 struct buffer_head *parent_fe_bh = NULL; 1799 struct ocfs2_dinode *fe = NULL; 1800 struct ocfs2_dinode *dirfe; 1801 handle_t *handle = NULL; 1802 struct ocfs2_alloc_context *inode_ac = NULL; 1803 struct ocfs2_alloc_context *data_ac = NULL; 1804 struct ocfs2_alloc_context *xattr_ac = NULL; 1805 int want_clusters = 0; 1806 int xattr_credits = 0; 1807 struct ocfs2_security_xattr_info si = { 1808 .enable = 1, 1809 }; 1810 int did_quota = 0, did_quota_inode = 0; 1811 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1812 sigset_t oldset; 1813 int did_block_signals = 0; 1814 struct ocfs2_dentry_lock *dl = NULL; 1815 1816 trace_ocfs2_symlink_begin(dir, dentry, symname, 1817 dentry->d_name.len, dentry->d_name.name); 1818 1819 status = dquot_initialize(dir); 1820 if (status) { 1821 mlog_errno(status); 1822 goto bail; 1823 } 1824 1825 sb = dir->i_sb; 1826 osb = OCFS2_SB(sb); 1827 1828 l = strlen(symname) + 1; 1829 1830 credits = ocfs2_calc_symlink_credits(sb); 1831 1832 /* lock the parent directory */ 1833 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1834 if (status < 0) { 1835 if (status != -ENOENT) 1836 mlog_errno(status); 1837 return status; 1838 } 1839 1840 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1841 if (!ocfs2_read_links_count(dirfe)) { 1842 /* can't make a file in a deleted directory. */ 1843 status = -ENOENT; 1844 goto bail; 1845 } 1846 1847 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1848 dentry->d_name.len); 1849 if (status) 1850 goto bail; 1851 1852 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1853 dentry->d_name.name, 1854 dentry->d_name.len, &lookup); 1855 if (status < 0) { 1856 mlog_errno(status); 1857 goto bail; 1858 } 1859 1860 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1861 if (status < 0) { 1862 if (status != -ENOSPC) 1863 mlog_errno(status); 1864 goto bail; 1865 } 1866 1867 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1868 if (IS_ERR(inode)) { 1869 status = PTR_ERR(inode); 1870 inode = NULL; 1871 mlog_errno(status); 1872 goto bail; 1873 } 1874 1875 /* get security xattr */ 1876 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1877 if (status) { 1878 if (status == -EOPNOTSUPP) 1879 si.enable = 0; 1880 else { 1881 mlog_errno(status); 1882 goto bail; 1883 } 1884 } 1885 1886 /* calculate meta data/clusters for setting security xattr */ 1887 if (si.enable) { 1888 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1889 &xattr_credits, &xattr_ac); 1890 if (status < 0) { 1891 mlog_errno(status); 1892 goto bail; 1893 } 1894 } 1895 1896 /* don't reserve bitmap space for fast symlinks. */ 1897 if (l > ocfs2_fast_symlink_chars(sb)) 1898 want_clusters += 1; 1899 1900 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1901 if (status < 0) { 1902 if (status != -ENOSPC) 1903 mlog_errno(status); 1904 goto bail; 1905 } 1906 1907 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1908 if (IS_ERR(handle)) { 1909 status = PTR_ERR(handle); 1910 handle = NULL; 1911 mlog_errno(status); 1912 goto bail; 1913 } 1914 1915 /* Starting to change things, restart is no longer possible. */ 1916 ocfs2_block_signals(&oldset); 1917 did_block_signals = 1; 1918 1919 status = dquot_alloc_inode(inode); 1920 if (status) 1921 goto bail; 1922 did_quota_inode = 1; 1923 1924 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1925 dentry->d_name.name, 1926 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1927 inode->i_mode); 1928 1929 status = ocfs2_mknod_locked(osb, dir, inode, 1930 0, &new_fe_bh, parent_fe_bh, handle, 1931 inode_ac); 1932 if (status < 0) { 1933 mlog_errno(status); 1934 goto bail; 1935 } 1936 1937 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1938 inode->i_rdev = 0; 1939 newsize = l - 1; 1940 inode->i_op = &ocfs2_symlink_inode_operations; 1941 inode_nohighmem(inode); 1942 if (l > ocfs2_fast_symlink_chars(sb)) { 1943 u32 offset = 0; 1944 1945 status = dquot_alloc_space_nodirty(inode, 1946 ocfs2_clusters_to_bytes(osb->sb, 1)); 1947 if (status) 1948 goto bail; 1949 did_quota = 1; 1950 inode->i_mapping->a_ops = &ocfs2_aops; 1951 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1952 new_fe_bh, 1953 handle, data_ac, NULL, 1954 NULL); 1955 if (status < 0) { 1956 if (status != -ENOSPC && status != -EINTR) { 1957 mlog(ML_ERROR, 1958 "Failed to extend file to %llu\n", 1959 (unsigned long long)newsize); 1960 mlog_errno(status); 1961 status = -ENOSPC; 1962 } 1963 goto bail; 1964 } 1965 i_size_write(inode, newsize); 1966 inode->i_blocks = ocfs2_inode_sector_count(inode); 1967 } else { 1968 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1969 memcpy((char *) fe->id2.i_symlink, symname, l); 1970 i_size_write(inode, newsize); 1971 inode->i_blocks = 0; 1972 } 1973 1974 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1975 if (status < 0) { 1976 mlog_errno(status); 1977 goto bail; 1978 } 1979 1980 if (!ocfs2_inode_is_fast_symlink(inode)) { 1981 status = ocfs2_create_symlink_data(osb, handle, inode, 1982 symname); 1983 if (status < 0) { 1984 mlog_errno(status); 1985 goto bail; 1986 } 1987 } 1988 1989 if (si.enable) { 1990 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 1991 xattr_ac, data_ac); 1992 if (status < 0) { 1993 mlog_errno(status); 1994 goto bail; 1995 } 1996 } 1997 1998 /* 1999 * Do this before adding the entry to the directory. We add 2000 * also set d_op after success so that ->d_iput() will cleanup 2001 * the dentry lock even if ocfs2_add_entry() fails below. 2002 */ 2003 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 2004 if (status) { 2005 mlog_errno(status); 2006 goto bail; 2007 } 2008 2009 dl = dentry->d_fsdata; 2010 2011 status = ocfs2_add_entry(handle, dentry, inode, 2012 le64_to_cpu(fe->i_blkno), parent_fe_bh, 2013 &lookup); 2014 if (status < 0) { 2015 mlog_errno(status); 2016 goto bail; 2017 } 2018 2019 insert_inode_hash(inode); 2020 d_instantiate(dentry, inode); 2021 bail: 2022 if (status < 0 && did_quota) 2023 dquot_free_space_nodirty(inode, 2024 ocfs2_clusters_to_bytes(osb->sb, 1)); 2025 if (status < 0 && did_quota_inode) 2026 dquot_free_inode(inode); 2027 if (handle) { 2028 if (status < 0 && fe) 2029 ocfs2_set_links_count(fe, 0); 2030 ocfs2_commit_trans(osb, handle); 2031 } 2032 2033 ocfs2_inode_unlock(dir, 1); 2034 if (did_block_signals) 2035 ocfs2_unblock_signals(&oldset); 2036 2037 brelse(new_fe_bh); 2038 brelse(parent_fe_bh); 2039 kfree(si.value); 2040 ocfs2_free_dir_lookup_result(&lookup); 2041 if (inode_ac) 2042 ocfs2_free_alloc_context(inode_ac); 2043 if (data_ac) 2044 ocfs2_free_alloc_context(data_ac); 2045 if (xattr_ac) 2046 ocfs2_free_alloc_context(xattr_ac); 2047 if ((status < 0) && inode) { 2048 if (dl) 2049 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 2050 2051 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 2052 clear_nlink(inode); 2053 iput(inode); 2054 } 2055 2056 if (status) 2057 mlog_errno(status); 2058 2059 return status; 2060 } 2061 2062 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2063 { 2064 int status, namelen; 2065 2066 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2067 (long long)blkno); 2068 if (namelen <= 0) { 2069 if (namelen) 2070 status = namelen; 2071 else 2072 status = -EINVAL; 2073 mlog_errno(status); 2074 goto bail; 2075 } 2076 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2077 status = -EINVAL; 2078 mlog_errno(status); 2079 goto bail; 2080 } 2081 2082 trace_ocfs2_blkno_stringify(blkno, name, namelen); 2083 2084 status = 0; 2085 bail: 2086 if (status < 0) 2087 mlog_errno(status); 2088 return status; 2089 } 2090 2091 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, 2092 struct inode **ret_orphan_dir, 2093 struct buffer_head **ret_orphan_dir_bh) 2094 { 2095 struct inode *orphan_dir_inode; 2096 struct buffer_head *orphan_dir_bh = NULL; 2097 int ret = 0; 2098 2099 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2100 ORPHAN_DIR_SYSTEM_INODE, 2101 osb->slot_num); 2102 if (!orphan_dir_inode) { 2103 ret = -ENOENT; 2104 mlog_errno(ret); 2105 return ret; 2106 } 2107 2108 inode_lock(orphan_dir_inode); 2109 2110 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2111 if (ret < 0) { 2112 inode_unlock(orphan_dir_inode); 2113 iput(orphan_dir_inode); 2114 2115 mlog_errno(ret); 2116 return ret; 2117 } 2118 2119 *ret_orphan_dir = orphan_dir_inode; 2120 *ret_orphan_dir_bh = orphan_dir_bh; 2121 2122 return 0; 2123 } 2124 2125 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, 2126 struct buffer_head *orphan_dir_bh, 2127 u64 blkno, 2128 char *name, 2129 struct ocfs2_dir_lookup_result *lookup, 2130 bool dio) 2131 { 2132 int ret; 2133 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); 2134 int namelen = dio ? 2135 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2136 OCFS2_ORPHAN_NAMELEN; 2137 2138 if (dio) { 2139 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2140 OCFS2_DIO_ORPHAN_PREFIX); 2141 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2142 ret = -EINVAL; 2143 mlog_errno(ret); 2144 return ret; 2145 } 2146 2147 ret = ocfs2_blkno_stringify(blkno, 2148 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2149 } else 2150 ret = ocfs2_blkno_stringify(blkno, name); 2151 if (ret < 0) { 2152 mlog_errno(ret); 2153 return ret; 2154 } 2155 2156 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2157 orphan_dir_bh, name, 2158 namelen, lookup); 2159 if (ret < 0) { 2160 mlog_errno(ret); 2161 return ret; 2162 } 2163 2164 return 0; 2165 } 2166 2167 /** 2168 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for 2169 * insertion of an orphan. 2170 * @osb: ocfs2 file system 2171 * @ret_orphan_dir: Orphan dir inode - returned locked! 2172 * @blkno: Actual block number of the inode to be inserted into orphan dir. 2173 * @lookup: dir lookup result, to be passed back into functions like 2174 * ocfs2_orphan_add 2175 * 2176 * Returns zero on success and the ret_orphan_dir, name and lookup 2177 * fields will be populated. 2178 * 2179 * Returns non-zero on failure. 2180 */ 2181 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2182 struct inode **ret_orphan_dir, 2183 u64 blkno, 2184 char *name, 2185 struct ocfs2_dir_lookup_result *lookup, 2186 bool dio) 2187 { 2188 struct inode *orphan_dir_inode = NULL; 2189 struct buffer_head *orphan_dir_bh = NULL; 2190 int ret = 0; 2191 2192 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, 2193 &orphan_dir_bh); 2194 if (ret < 0) { 2195 mlog_errno(ret); 2196 return ret; 2197 } 2198 2199 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, 2200 blkno, name, lookup, dio); 2201 if (ret < 0) { 2202 mlog_errno(ret); 2203 goto out; 2204 } 2205 2206 *ret_orphan_dir = orphan_dir_inode; 2207 2208 out: 2209 brelse(orphan_dir_bh); 2210 2211 if (ret) { 2212 ocfs2_inode_unlock(orphan_dir_inode, 1); 2213 inode_unlock(orphan_dir_inode); 2214 iput(orphan_dir_inode); 2215 } 2216 2217 if (ret) 2218 mlog_errno(ret); 2219 return ret; 2220 } 2221 2222 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2223 handle_t *handle, 2224 struct inode *inode, 2225 struct buffer_head *fe_bh, 2226 char *name, 2227 struct ocfs2_dir_lookup_result *lookup, 2228 struct inode *orphan_dir_inode, 2229 bool dio) 2230 { 2231 struct buffer_head *orphan_dir_bh = NULL; 2232 int status = 0; 2233 struct ocfs2_dinode *orphan_fe; 2234 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 2235 int namelen = dio ? 2236 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2237 OCFS2_ORPHAN_NAMELEN; 2238 2239 trace_ocfs2_orphan_add_begin( 2240 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2241 2242 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 2243 if (status < 0) { 2244 mlog_errno(status); 2245 goto leave; 2246 } 2247 2248 status = ocfs2_journal_access_di(handle, 2249 INODE_CACHE(orphan_dir_inode), 2250 orphan_dir_bh, 2251 OCFS2_JOURNAL_ACCESS_WRITE); 2252 if (status < 0) { 2253 mlog_errno(status); 2254 goto leave; 2255 } 2256 2257 /* 2258 * We're going to journal the change of i_flags and i_orphaned_slot. 2259 * It's safe anyway, though some callers may duplicate the journaling. 2260 * Journaling within the func just make the logic look more 2261 * straightforward. 2262 */ 2263 status = ocfs2_journal_access_di(handle, 2264 INODE_CACHE(inode), 2265 fe_bh, 2266 OCFS2_JOURNAL_ACCESS_WRITE); 2267 if (status < 0) { 2268 mlog_errno(status); 2269 goto leave; 2270 } 2271 2272 /* we're a cluster, and nlink can change on disk from 2273 * underneath us... */ 2274 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2275 if (S_ISDIR(inode->i_mode)) 2276 ocfs2_add_links_count(orphan_fe, 1); 2277 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2278 ocfs2_journal_dirty(handle, orphan_dir_bh); 2279 2280 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2281 namelen, inode, 2282 OCFS2_I(inode)->ip_blkno, 2283 orphan_dir_bh, lookup); 2284 if (status < 0) { 2285 mlog_errno(status); 2286 goto rollback; 2287 } 2288 2289 if (dio) { 2290 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan 2291 * slot. 2292 */ 2293 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2294 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); 2295 } else { 2296 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL); 2297 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; 2298 2299 /* Record which orphan dir our inode now resides 2300 * in. delete_inode will use this to determine which orphan 2301 * dir to lock. */ 2302 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2303 } 2304 2305 ocfs2_journal_dirty(handle, fe_bh); 2306 2307 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, 2308 osb->slot_num); 2309 2310 rollback: 2311 if (status < 0) { 2312 if (S_ISDIR(inode->i_mode)) 2313 ocfs2_add_links_count(orphan_fe, -1); 2314 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2315 } 2316 2317 leave: 2318 brelse(orphan_dir_bh); 2319 2320 return status; 2321 } 2322 2323 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2324 int ocfs2_orphan_del(struct ocfs2_super *osb, 2325 handle_t *handle, 2326 struct inode *orphan_dir_inode, 2327 struct inode *inode, 2328 struct buffer_head *orphan_dir_bh, 2329 bool dio) 2330 { 2331 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2332 struct ocfs2_dinode *orphan_fe; 2333 int status = 0; 2334 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2335 2336 if (dio) { 2337 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2338 OCFS2_DIO_ORPHAN_PREFIX); 2339 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2340 status = -EINVAL; 2341 mlog_errno(status); 2342 return status; 2343 } 2344 2345 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, 2346 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2347 } else 2348 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2349 if (status < 0) { 2350 mlog_errno(status); 2351 goto leave; 2352 } 2353 2354 trace_ocfs2_orphan_del( 2355 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2356 name, strlen(name)); 2357 2358 status = ocfs2_journal_access_di(handle, 2359 INODE_CACHE(orphan_dir_inode), 2360 orphan_dir_bh, 2361 OCFS2_JOURNAL_ACCESS_WRITE); 2362 if (status < 0) { 2363 mlog_errno(status); 2364 goto leave; 2365 } 2366 2367 /* find it's spot in the orphan directory */ 2368 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode, 2369 &lookup); 2370 if (status) { 2371 mlog_errno(status); 2372 goto leave; 2373 } 2374 2375 /* remove it from the orphan directory */ 2376 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); 2377 if (status < 0) { 2378 mlog_errno(status); 2379 goto leave; 2380 } 2381 2382 /* do the i_nlink dance! :) */ 2383 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2384 if (S_ISDIR(inode->i_mode)) 2385 ocfs2_add_links_count(orphan_fe, -1); 2386 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2387 ocfs2_journal_dirty(handle, orphan_dir_bh); 2388 2389 leave: 2390 ocfs2_free_dir_lookup_result(&lookup); 2391 2392 if (status) 2393 mlog_errno(status); 2394 return status; 2395 } 2396 2397 /** 2398 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly 2399 * allocated file. This is different from the typical 'add to orphan dir' 2400 * operation in that the inode does not yet exist. This is a problem because 2401 * the orphan dir stringifies the inode block number to come up with it's 2402 * dirent. Obviously if the inode does not yet exist we have a chicken and egg 2403 * problem. This function works around it by calling deeper into the orphan 2404 * and suballoc code than other callers. Use this only by necessity. 2405 * @dir: The directory which this inode will ultimately wind up under - not the 2406 * orphan dir! 2407 * @dir_bh: buffer_head the @dir inode block 2408 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled 2409 * with the string to be used for orphan dirent. Pass back to the orphan dir 2410 * code. 2411 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan 2412 * dir code. 2413 * @ret_di_blkno: block number where the new inode will be allocated. 2414 * @orphan_insert: Dir insert context to be passed back into orphan dir code. 2415 * @ret_inode_ac: Inode alloc context to be passed back to the allocator. 2416 * 2417 * Returns zero on success and the ret_orphan_dir, name and lookup 2418 * fields will be populated. 2419 * 2420 * Returns non-zero on failure. 2421 */ 2422 static int ocfs2_prep_new_orphaned_file(struct inode *dir, 2423 struct buffer_head *dir_bh, 2424 char *orphan_name, 2425 struct inode **ret_orphan_dir, 2426 u64 *ret_di_blkno, 2427 struct ocfs2_dir_lookup_result *orphan_insert, 2428 struct ocfs2_alloc_context **ret_inode_ac) 2429 { 2430 int ret; 2431 u64 di_blkno; 2432 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2433 struct inode *orphan_dir = NULL; 2434 struct buffer_head *orphan_dir_bh = NULL; 2435 struct ocfs2_alloc_context *inode_ac = NULL; 2436 2437 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); 2438 if (ret < 0) { 2439 mlog_errno(ret); 2440 return ret; 2441 } 2442 2443 /* reserve an inode spot */ 2444 ret = ocfs2_reserve_new_inode(osb, &inode_ac); 2445 if (ret < 0) { 2446 if (ret != -ENOSPC) 2447 mlog_errno(ret); 2448 goto out; 2449 } 2450 2451 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, 2452 &di_blkno); 2453 if (ret) { 2454 mlog_errno(ret); 2455 goto out; 2456 } 2457 2458 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, 2459 di_blkno, orphan_name, orphan_insert, 2460 false); 2461 if (ret < 0) { 2462 mlog_errno(ret); 2463 goto out; 2464 } 2465 2466 out: 2467 if (ret == 0) { 2468 *ret_orphan_dir = orphan_dir; 2469 *ret_di_blkno = di_blkno; 2470 *ret_inode_ac = inode_ac; 2471 /* 2472 * orphan_name and orphan_insert are already up to 2473 * date via prepare_orphan_dir 2474 */ 2475 } else { 2476 /* Unroll reserve_new_inode* */ 2477 if (inode_ac) 2478 ocfs2_free_alloc_context(inode_ac); 2479 2480 /* Unroll orphan dir locking */ 2481 inode_unlock(orphan_dir); 2482 ocfs2_inode_unlock(orphan_dir, 1); 2483 iput(orphan_dir); 2484 } 2485 2486 brelse(orphan_dir_bh); 2487 2488 return ret; 2489 } 2490 2491 int ocfs2_create_inode_in_orphan(struct inode *dir, 2492 int mode, 2493 struct inode **new_inode) 2494 { 2495 int status, did_quota_inode = 0; 2496 struct inode *inode = NULL; 2497 struct inode *orphan_dir = NULL; 2498 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2499 handle_t *handle = NULL; 2500 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2501 struct buffer_head *parent_di_bh = NULL; 2502 struct buffer_head *new_di_bh = NULL; 2503 struct ocfs2_alloc_context *inode_ac = NULL; 2504 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2505 u64 di_blkno, suballoc_loc; 2506 u16 suballoc_bit; 2507 2508 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2509 if (status < 0) { 2510 if (status != -ENOENT) 2511 mlog_errno(status); 2512 return status; 2513 } 2514 2515 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, 2516 orphan_name, &orphan_dir, 2517 &di_blkno, &orphan_insert, &inode_ac); 2518 if (status < 0) { 2519 if (status != -ENOSPC) 2520 mlog_errno(status); 2521 goto leave; 2522 } 2523 2524 inode = ocfs2_get_init_inode(dir, mode); 2525 if (IS_ERR(inode)) { 2526 status = PTR_ERR(inode); 2527 inode = NULL; 2528 mlog_errno(status); 2529 goto leave; 2530 } 2531 2532 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2533 if (IS_ERR(handle)) { 2534 status = PTR_ERR(handle); 2535 handle = NULL; 2536 mlog_errno(status); 2537 goto leave; 2538 } 2539 2540 status = dquot_alloc_inode(inode); 2541 if (status) 2542 goto leave; 2543 did_quota_inode = 1; 2544 2545 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, 2546 &suballoc_loc, 2547 &suballoc_bit, di_blkno); 2548 if (status < 0) { 2549 mlog_errno(status); 2550 goto leave; 2551 } 2552 2553 clear_nlink(inode); 2554 /* do the real work now. */ 2555 status = __ocfs2_mknod_locked(dir, inode, 2556 0, &new_di_bh, parent_di_bh, handle, 2557 inode_ac, di_blkno, suballoc_loc, 2558 suballoc_bit); 2559 if (status < 0) { 2560 mlog_errno(status); 2561 goto leave; 2562 } 2563 2564 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, 2565 &orphan_insert, orphan_dir, false); 2566 if (status < 0) { 2567 mlog_errno(status); 2568 goto leave; 2569 } 2570 2571 /* get open lock so that only nodes can't remove it from orphan dir. */ 2572 status = ocfs2_open_lock(inode); 2573 if (status < 0) 2574 mlog_errno(status); 2575 2576 insert_inode_hash(inode); 2577 leave: 2578 if (status < 0 && did_quota_inode) 2579 dquot_free_inode(inode); 2580 if (handle) 2581 ocfs2_commit_trans(osb, handle); 2582 2583 if (orphan_dir) { 2584 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2585 ocfs2_inode_unlock(orphan_dir, 1); 2586 inode_unlock(orphan_dir); 2587 iput(orphan_dir); 2588 } 2589 2590 if ((status < 0) && inode) { 2591 clear_nlink(inode); 2592 iput(inode); 2593 } 2594 2595 if (inode_ac) 2596 ocfs2_free_alloc_context(inode_ac); 2597 2598 brelse(new_di_bh); 2599 2600 if (!status) 2601 *new_inode = inode; 2602 2603 ocfs2_free_dir_lookup_result(&orphan_insert); 2604 2605 ocfs2_inode_unlock(dir, 1); 2606 brelse(parent_di_bh); 2607 return status; 2608 } 2609 2610 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, 2611 struct inode *inode) 2612 { 2613 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2614 struct inode *orphan_dir_inode = NULL; 2615 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2616 struct buffer_head *di_bh = NULL; 2617 int status = 0; 2618 handle_t *handle = NULL; 2619 struct ocfs2_dinode *di = NULL; 2620 2621 status = ocfs2_inode_lock(inode, &di_bh, 1); 2622 if (status < 0) { 2623 mlog_errno(status); 2624 goto bail; 2625 } 2626 2627 di = (struct ocfs2_dinode *) di_bh->b_data; 2628 /* 2629 * Another append dio crashed? 2630 * If so, manually recover it first. 2631 */ 2632 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 2633 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode)); 2634 if (status < 0) { 2635 if (status != -ENOSPC) 2636 mlog_errno(status); 2637 goto bail_unlock_inode; 2638 } 2639 2640 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0); 2641 if (status < 0) { 2642 mlog_errno(status); 2643 goto bail_unlock_inode; 2644 } 2645 } 2646 2647 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, 2648 OCFS2_I(inode)->ip_blkno, 2649 orphan_name, 2650 &orphan_insert, 2651 true); 2652 if (status < 0) { 2653 mlog_errno(status); 2654 goto bail_unlock_inode; 2655 } 2656 2657 handle = ocfs2_start_trans(osb, 2658 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); 2659 if (IS_ERR(handle)) { 2660 status = PTR_ERR(handle); 2661 goto bail_unlock_orphan; 2662 } 2663 2664 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, 2665 &orphan_insert, orphan_dir_inode, true); 2666 if (status) 2667 mlog_errno(status); 2668 2669 ocfs2_commit_trans(osb, handle); 2670 2671 bail_unlock_orphan: 2672 ocfs2_inode_unlock(orphan_dir_inode, 1); 2673 inode_unlock(orphan_dir_inode); 2674 iput(orphan_dir_inode); 2675 2676 ocfs2_free_dir_lookup_result(&orphan_insert); 2677 2678 bail_unlock_inode: 2679 ocfs2_inode_unlock(inode, 1); 2680 brelse(di_bh); 2681 2682 bail: 2683 return status; 2684 } 2685 2686 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, 2687 struct inode *inode, struct buffer_head *di_bh, 2688 int update_isize, loff_t end) 2689 { 2690 struct inode *orphan_dir_inode = NULL; 2691 struct buffer_head *orphan_dir_bh = NULL; 2692 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2693 handle_t *handle = NULL; 2694 int status = 0; 2695 2696 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2697 ORPHAN_DIR_SYSTEM_INODE, 2698 le16_to_cpu(di->i_dio_orphaned_slot)); 2699 if (!orphan_dir_inode) { 2700 status = -ENOENT; 2701 mlog_errno(status); 2702 goto bail; 2703 } 2704 2705 inode_lock(orphan_dir_inode); 2706 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2707 if (status < 0) { 2708 inode_unlock(orphan_dir_inode); 2709 iput(orphan_dir_inode); 2710 mlog_errno(status); 2711 goto bail; 2712 } 2713 2714 handle = ocfs2_start_trans(osb, 2715 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); 2716 if (IS_ERR(handle)) { 2717 status = PTR_ERR(handle); 2718 goto bail_unlock_orphan; 2719 } 2720 2721 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); 2722 2723 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, 2724 inode, orphan_dir_bh, true); 2725 if (status < 0) { 2726 mlog_errno(status); 2727 goto bail_commit; 2728 } 2729 2730 status = ocfs2_journal_access_di(handle, 2731 INODE_CACHE(inode), 2732 di_bh, 2733 OCFS2_JOURNAL_ACCESS_WRITE); 2734 if (status < 0) { 2735 mlog_errno(status); 2736 goto bail_commit; 2737 } 2738 2739 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2740 di->i_dio_orphaned_slot = 0; 2741 2742 if (update_isize) { 2743 status = ocfs2_set_inode_size(handle, inode, di_bh, end); 2744 if (status) 2745 mlog_errno(status); 2746 } else 2747 ocfs2_journal_dirty(handle, di_bh); 2748 2749 bail_commit: 2750 ocfs2_commit_trans(osb, handle); 2751 2752 bail_unlock_orphan: 2753 ocfs2_inode_unlock(orphan_dir_inode, 1); 2754 inode_unlock(orphan_dir_inode); 2755 brelse(orphan_dir_bh); 2756 iput(orphan_dir_inode); 2757 2758 bail: 2759 return status; 2760 } 2761 2762 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2763 struct inode *inode, 2764 struct dentry *dentry) 2765 { 2766 int status = 0; 2767 struct buffer_head *parent_di_bh = NULL; 2768 handle_t *handle = NULL; 2769 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2770 struct ocfs2_dinode *dir_di, *di; 2771 struct inode *orphan_dir_inode = NULL; 2772 struct buffer_head *orphan_dir_bh = NULL; 2773 struct buffer_head *di_bh = NULL; 2774 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2775 2776 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, 2777 dentry->d_name.len, dentry->d_name.name, 2778 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2779 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2780 2781 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2782 if (status < 0) { 2783 if (status != -ENOENT) 2784 mlog_errno(status); 2785 return status; 2786 } 2787 2788 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2789 if (!dir_di->i_links_count) { 2790 /* can't make a file in a deleted directory. */ 2791 status = -ENOENT; 2792 goto leave; 2793 } 2794 2795 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2796 dentry->d_name.len); 2797 if (status) 2798 goto leave; 2799 2800 /* get a spot inside the dir. */ 2801 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2802 dentry->d_name.name, 2803 dentry->d_name.len, &lookup); 2804 if (status < 0) { 2805 mlog_errno(status); 2806 goto leave; 2807 } 2808 2809 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2810 ORPHAN_DIR_SYSTEM_INODE, 2811 osb->slot_num); 2812 if (!orphan_dir_inode) { 2813 status = -ENOENT; 2814 mlog_errno(status); 2815 goto leave; 2816 } 2817 2818 inode_lock(orphan_dir_inode); 2819 2820 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2821 if (status < 0) { 2822 mlog_errno(status); 2823 inode_unlock(orphan_dir_inode); 2824 iput(orphan_dir_inode); 2825 goto leave; 2826 } 2827 2828 status = ocfs2_read_inode_block(inode, &di_bh); 2829 if (status < 0) { 2830 mlog_errno(status); 2831 goto orphan_unlock; 2832 } 2833 2834 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2835 if (IS_ERR(handle)) { 2836 status = PTR_ERR(handle); 2837 handle = NULL; 2838 mlog_errno(status); 2839 goto orphan_unlock; 2840 } 2841 2842 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2843 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2844 if (status < 0) { 2845 mlog_errno(status); 2846 goto out_commit; 2847 } 2848 2849 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2850 orphan_dir_bh, false); 2851 if (status < 0) { 2852 mlog_errno(status); 2853 goto out_commit; 2854 } 2855 2856 di = (struct ocfs2_dinode *)di_bh->b_data; 2857 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); 2858 di->i_orphaned_slot = 0; 2859 set_nlink(inode, 1); 2860 ocfs2_set_links_count(di, inode->i_nlink); 2861 ocfs2_update_inode_fsync_trans(handle, inode, 1); 2862 ocfs2_journal_dirty(handle, di_bh); 2863 2864 status = ocfs2_add_entry(handle, dentry, inode, 2865 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2866 &lookup); 2867 if (status < 0) { 2868 mlog_errno(status); 2869 goto out_commit; 2870 } 2871 2872 status = ocfs2_dentry_attach_lock(dentry, inode, 2873 OCFS2_I(dir)->ip_blkno); 2874 if (status) { 2875 mlog_errno(status); 2876 goto out_commit; 2877 } 2878 2879 d_instantiate(dentry, inode); 2880 status = 0; 2881 out_commit: 2882 ocfs2_commit_trans(osb, handle); 2883 orphan_unlock: 2884 ocfs2_inode_unlock(orphan_dir_inode, 1); 2885 inode_unlock(orphan_dir_inode); 2886 iput(orphan_dir_inode); 2887 leave: 2888 2889 ocfs2_inode_unlock(dir, 1); 2890 2891 brelse(di_bh); 2892 brelse(parent_di_bh); 2893 brelse(orphan_dir_bh); 2894 2895 ocfs2_free_dir_lookup_result(&lookup); 2896 2897 if (status) 2898 mlog_errno(status); 2899 2900 return status; 2901 } 2902 2903 const struct inode_operations ocfs2_dir_iops = { 2904 .create = ocfs2_create, 2905 .lookup = ocfs2_lookup, 2906 .link = ocfs2_link, 2907 .unlink = ocfs2_unlink, 2908 .rmdir = ocfs2_unlink, 2909 .symlink = ocfs2_symlink, 2910 .mkdir = ocfs2_mkdir, 2911 .mknod = ocfs2_mknod, 2912 .rename = ocfs2_rename, 2913 .setattr = ocfs2_setattr, 2914 .getattr = ocfs2_getattr, 2915 .permission = ocfs2_permission, 2916 .listxattr = ocfs2_listxattr, 2917 .fiemap = ocfs2_fiemap, 2918 .get_inode_acl = ocfs2_iop_get_acl, 2919 .set_acl = ocfs2_iop_set_acl, 2920 .fileattr_get = ocfs2_fileattr_get, 2921 .fileattr_set = ocfs2_fileattr_set, 2922 }; 2923