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 .name = NULL, 246 .enable = 1, 247 }; 248 int did_quota_inode = 0; 249 struct ocfs2_dir_lookup_result lookup = { NULL, }; 250 sigset_t oldset; 251 int did_block_signals = 0; 252 struct ocfs2_dentry_lock *dl = NULL; 253 254 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name, 255 (unsigned long long)OCFS2_I(dir)->ip_blkno, 256 (unsigned long)dev, mode); 257 258 status = dquot_initialize(dir); 259 if (status) { 260 mlog_errno(status); 261 return status; 262 } 263 264 /* get our super block */ 265 osb = OCFS2_SB(dir->i_sb); 266 267 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 268 if (status < 0) { 269 if (status != -ENOENT) 270 mlog_errno(status); 271 return status; 272 } 273 274 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) { 275 status = -EMLINK; 276 goto leave; 277 } 278 279 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 280 if (!ocfs2_read_links_count(dirfe)) { 281 /* can't make a file in a deleted directory. */ 282 status = -ENOENT; 283 goto leave; 284 } 285 286 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 287 dentry->d_name.len); 288 if (status) 289 goto leave; 290 291 /* get a spot inside the dir. */ 292 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 293 dentry->d_name.name, 294 dentry->d_name.len, &lookup); 295 if (status < 0) { 296 mlog_errno(status); 297 goto leave; 298 } 299 300 /* reserve an inode spot */ 301 status = ocfs2_reserve_new_inode(osb, &inode_ac); 302 if (status < 0) { 303 if (status != -ENOSPC) 304 mlog_errno(status); 305 goto leave; 306 } 307 308 inode = ocfs2_get_init_inode(dir, mode); 309 if (IS_ERR(inode)) { 310 status = PTR_ERR(inode); 311 inode = NULL; 312 mlog_errno(status); 313 goto leave; 314 } 315 316 /* get security xattr */ 317 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 318 if (status) { 319 if (status == -EOPNOTSUPP) 320 si.enable = 0; 321 else { 322 mlog_errno(status); 323 goto leave; 324 } 325 } 326 327 /* calculate meta data/clusters for setting security and acl xattr */ 328 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode, 329 &si, &want_clusters, 330 &xattr_credits, &want_meta); 331 if (status < 0) { 332 mlog_errno(status); 333 goto leave; 334 } 335 336 /* Reserve a cluster if creating an extent based directory. */ 337 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { 338 want_clusters += 1; 339 340 /* Dir indexing requires extra space as well */ 341 if (ocfs2_supports_indexed_dirs(osb)) 342 want_meta++; 343 } 344 345 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac); 346 if (status < 0) { 347 if (status != -ENOSPC) 348 mlog_errno(status); 349 goto leave; 350 } 351 352 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 353 if (status < 0) { 354 if (status != -ENOSPC) 355 mlog_errno(status); 356 goto leave; 357 } 358 359 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 360 S_ISDIR(mode), 361 xattr_credits)); 362 if (IS_ERR(handle)) { 363 status = PTR_ERR(handle); 364 handle = NULL; 365 mlog_errno(status); 366 goto leave; 367 } 368 369 /* Starting to change things, restart is no longer possible. */ 370 ocfs2_block_signals(&oldset); 371 did_block_signals = 1; 372 373 status = dquot_alloc_inode(inode); 374 if (status) 375 goto leave; 376 did_quota_inode = 1; 377 378 /* do the real work now. */ 379 status = ocfs2_mknod_locked(osb, dir, inode, dev, 380 &new_fe_bh, parent_fe_bh, handle, 381 inode_ac); 382 if (status < 0) { 383 mlog_errno(status); 384 goto leave; 385 } 386 387 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 388 if (S_ISDIR(mode)) { 389 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 390 new_fe_bh, data_ac, meta_ac); 391 if (status < 0) { 392 mlog_errno(status); 393 goto leave; 394 } 395 396 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir), 397 parent_fe_bh, 398 OCFS2_JOURNAL_ACCESS_WRITE); 399 if (status < 0) { 400 mlog_errno(status); 401 goto leave; 402 } 403 ocfs2_add_links_count(dirfe, 1); 404 ocfs2_journal_dirty(handle, parent_fe_bh); 405 inc_nlink(dir); 406 } 407 408 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh, 409 meta_ac, data_ac); 410 411 if (status < 0) { 412 mlog_errno(status); 413 goto roll_back; 414 } 415 416 if (si.enable) { 417 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 418 meta_ac, data_ac); 419 if (status < 0) { 420 mlog_errno(status); 421 goto roll_back; 422 } 423 } 424 425 /* 426 * Do this before adding the entry to the directory. We add 427 * also set d_op after success so that ->d_iput() will cleanup 428 * the dentry lock even if ocfs2_add_entry() fails below. 429 */ 430 status = ocfs2_dentry_attach_lock(dentry, inode, 431 OCFS2_I(dir)->ip_blkno); 432 if (status) { 433 mlog_errno(status); 434 goto roll_back; 435 } 436 437 dl = dentry->d_fsdata; 438 439 status = ocfs2_add_entry(handle, dentry, inode, 440 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 441 &lookup); 442 if (status < 0) { 443 mlog_errno(status); 444 goto roll_back; 445 } 446 447 insert_inode_hash(inode); 448 d_instantiate(dentry, inode); 449 status = 0; 450 451 roll_back: 452 if (status < 0 && S_ISDIR(mode)) { 453 ocfs2_add_links_count(dirfe, -1); 454 drop_nlink(dir); 455 } 456 457 leave: 458 if (status < 0 && did_quota_inode) 459 dquot_free_inode(inode); 460 if (handle) { 461 if (status < 0 && fe) 462 ocfs2_set_links_count(fe, 0); 463 ocfs2_commit_trans(osb, handle); 464 } 465 466 ocfs2_inode_unlock(dir, 1); 467 if (did_block_signals) 468 ocfs2_unblock_signals(&oldset); 469 470 brelse(new_fe_bh); 471 brelse(parent_fe_bh); 472 kfree(si.value); 473 474 ocfs2_free_dir_lookup_result(&lookup); 475 476 if (inode_ac) 477 ocfs2_free_alloc_context(inode_ac); 478 479 if (data_ac) 480 ocfs2_free_alloc_context(data_ac); 481 482 if (meta_ac) 483 ocfs2_free_alloc_context(meta_ac); 484 485 /* 486 * We should call iput after the i_rwsem of the bitmap been 487 * unlocked in ocfs2_free_alloc_context, or the 488 * ocfs2_delete_inode will mutex_lock again. 489 */ 490 if ((status < 0) && inode) { 491 if (dl) 492 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 493 494 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 495 clear_nlink(inode); 496 iput(inode); 497 } 498 499 if (status) 500 mlog_errno(status); 501 502 return status; 503 } 504 505 static int __ocfs2_mknod_locked(struct inode *dir, 506 struct inode *inode, 507 dev_t dev, 508 struct buffer_head **new_fe_bh, 509 struct buffer_head *parent_fe_bh, 510 handle_t *handle, 511 struct ocfs2_alloc_context *inode_ac, 512 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit) 513 { 514 int status = 0; 515 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 516 struct ocfs2_dinode *fe = NULL; 517 struct ocfs2_extent_list *fel; 518 u16 feat; 519 struct ocfs2_inode_info *oi = OCFS2_I(inode); 520 struct timespec64 ts; 521 522 *new_fe_bh = NULL; 523 524 /* populate as many fields early on as possible - many of 525 * these are used by the support functions here and in 526 * callers. */ 527 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 528 oi->ip_blkno = fe_blkno; 529 spin_lock(&osb->osb_lock); 530 inode->i_generation = osb->s_next_generation++; 531 spin_unlock(&osb->osb_lock); 532 533 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 534 if (!*new_fe_bh) { 535 status = -ENOMEM; 536 mlog_errno(status); 537 goto leave; 538 } 539 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh); 540 541 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 542 *new_fe_bh, 543 OCFS2_JOURNAL_ACCESS_CREATE); 544 if (status < 0) { 545 mlog_errno(status); 546 goto leave; 547 } 548 549 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 550 memset(fe, 0, osb->sb->s_blocksize); 551 552 fe->i_generation = cpu_to_le32(inode->i_generation); 553 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 554 fe->i_blkno = cpu_to_le64(fe_blkno); 555 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc); 556 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 557 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); 558 fe->i_uid = cpu_to_le32(i_uid_read(inode)); 559 fe->i_gid = cpu_to_le32(i_gid_read(inode)); 560 fe->i_mode = cpu_to_le16(inode->i_mode); 561 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 562 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 563 564 ocfs2_set_links_count(fe, inode->i_nlink); 565 566 fe->i_last_eb_blk = 0; 567 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 568 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL); 569 ktime_get_real_ts64(&ts); 570 fe->i_atime = fe->i_ctime = fe->i_mtime = 571 cpu_to_le64(ts.tv_sec); 572 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 573 cpu_to_le32(ts.tv_nsec); 574 fe->i_dtime = 0; 575 576 /* 577 * If supported, directories start with inline data. If inline 578 * isn't supported, but indexing is, we start them as indexed. 579 */ 580 feat = le16_to_cpu(fe->i_dyn_features); 581 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) { 582 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); 583 584 fe->id2.i_data.id_count = cpu_to_le16( 585 ocfs2_max_inline_data_with_xattr(osb->sb, fe)); 586 } else { 587 fel = &fe->id2.i_list; 588 fel->l_tree_depth = 0; 589 fel->l_next_free_rec = 0; 590 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 591 } 592 593 ocfs2_journal_dirty(handle, *new_fe_bh); 594 595 ocfs2_populate_inode(inode, fe, 1); 596 ocfs2_ci_set_new(osb, INODE_CACHE(inode)); 597 if (!ocfs2_mount_local(osb)) { 598 status = ocfs2_create_new_inode_locks(inode); 599 if (status < 0) 600 mlog_errno(status); 601 } 602 603 ocfs2_update_inode_fsync_trans(handle, inode, 1); 604 605 leave: 606 if (status < 0) { 607 if (*new_fe_bh) { 608 brelse(*new_fe_bh); 609 *new_fe_bh = NULL; 610 } 611 } 612 613 if (status) 614 mlog_errno(status); 615 return status; 616 } 617 618 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 619 struct inode *dir, 620 struct inode *inode, 621 dev_t dev, 622 struct buffer_head **new_fe_bh, 623 struct buffer_head *parent_fe_bh, 624 handle_t *handle, 625 struct ocfs2_alloc_context *inode_ac) 626 { 627 int status = 0; 628 u64 suballoc_loc, fe_blkno = 0; 629 u16 suballoc_bit; 630 631 *new_fe_bh = NULL; 632 633 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh, 634 inode_ac, &suballoc_loc, 635 &suballoc_bit, &fe_blkno); 636 if (status < 0) { 637 mlog_errno(status); 638 return status; 639 } 640 641 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, 642 parent_fe_bh, handle, inode_ac, 643 fe_blkno, suballoc_loc, suballoc_bit); 644 } 645 646 static int ocfs2_mkdir(struct mnt_idmap *idmap, 647 struct inode *dir, 648 struct dentry *dentry, 649 umode_t mode) 650 { 651 int ret; 652 653 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, 654 OCFS2_I(dir)->ip_blkno, mode); 655 ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFDIR, 0); 656 if (ret) 657 mlog_errno(ret); 658 659 return ret; 660 } 661 662 static int ocfs2_create(struct mnt_idmap *idmap, 663 struct inode *dir, 664 struct dentry *dentry, 665 umode_t mode, 666 bool excl) 667 { 668 int ret; 669 670 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name, 671 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode); 672 ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFREG, 0); 673 if (ret) 674 mlog_errno(ret); 675 676 return ret; 677 } 678 679 static int ocfs2_link(struct dentry *old_dentry, 680 struct inode *dir, 681 struct dentry *dentry) 682 { 683 handle_t *handle; 684 struct inode *inode = d_inode(old_dentry); 685 struct inode *old_dir = d_inode(old_dentry->d_parent); 686 int err; 687 struct buffer_head *fe_bh = NULL; 688 struct buffer_head *old_dir_bh = NULL; 689 struct buffer_head *parent_fe_bh = NULL; 690 struct ocfs2_dinode *fe = NULL; 691 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 692 struct ocfs2_dir_lookup_result lookup = { NULL, }; 693 sigset_t oldset; 694 u64 old_de_ino; 695 696 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno, 697 old_dentry->d_name.len, old_dentry->d_name.name, 698 dentry->d_name.len, dentry->d_name.name); 699 700 if (S_ISDIR(inode->i_mode)) 701 return -EPERM; 702 703 err = dquot_initialize(dir); 704 if (err) { 705 mlog_errno(err); 706 return err; 707 } 708 709 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 710 &parent_fe_bh, dir, 0); 711 if (err < 0) { 712 if (err != -ENOENT) 713 mlog_errno(err); 714 return err; 715 } 716 717 /* make sure both dirs have bhs 718 * get an extra ref on old_dir_bh if old==new */ 719 if (!parent_fe_bh) { 720 if (old_dir_bh) { 721 parent_fe_bh = old_dir_bh; 722 get_bh(parent_fe_bh); 723 } else { 724 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str); 725 err = -EIO; 726 goto out; 727 } 728 } 729 730 if (!dir->i_nlink) { 731 err = -ENOENT; 732 goto out; 733 } 734 735 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 736 old_dentry->d_name.len, &old_de_ino); 737 if (err) { 738 err = -ENOENT; 739 goto out; 740 } 741 742 /* 743 * Check whether another node removed the source inode while we 744 * were in the vfs. 745 */ 746 if (old_de_ino != OCFS2_I(inode)->ip_blkno) { 747 err = -ENOENT; 748 goto out; 749 } 750 751 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 752 dentry->d_name.len); 753 if (err) 754 goto out; 755 756 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 757 dentry->d_name.name, 758 dentry->d_name.len, &lookup); 759 if (err < 0) { 760 mlog_errno(err); 761 goto out; 762 } 763 764 err = ocfs2_inode_lock(inode, &fe_bh, 1); 765 if (err < 0) { 766 if (err != -ENOENT) 767 mlog_errno(err); 768 goto out; 769 } 770 771 fe = (struct ocfs2_dinode *) fe_bh->b_data; 772 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { 773 err = -EMLINK; 774 goto out_unlock_inode; 775 } 776 777 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); 778 if (IS_ERR(handle)) { 779 err = PTR_ERR(handle); 780 handle = NULL; 781 mlog_errno(err); 782 goto out_unlock_inode; 783 } 784 785 /* Starting to change things, restart is no longer possible. */ 786 ocfs2_block_signals(&oldset); 787 788 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 789 OCFS2_JOURNAL_ACCESS_WRITE); 790 if (err < 0) { 791 mlog_errno(err); 792 goto out_commit; 793 } 794 795 inc_nlink(inode); 796 inode->i_ctime = current_time(inode); 797 ocfs2_set_links_count(fe, inode->i_nlink); 798 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 799 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 800 ocfs2_journal_dirty(handle, fe_bh); 801 802 err = ocfs2_add_entry(handle, dentry, inode, 803 OCFS2_I(inode)->ip_blkno, 804 parent_fe_bh, &lookup); 805 if (err) { 806 ocfs2_add_links_count(fe, -1); 807 drop_nlink(inode); 808 mlog_errno(err); 809 goto out_commit; 810 } 811 812 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 813 if (err) { 814 mlog_errno(err); 815 goto out_commit; 816 } 817 818 ihold(inode); 819 d_instantiate(dentry, inode); 820 821 out_commit: 822 ocfs2_commit_trans(osb, handle); 823 ocfs2_unblock_signals(&oldset); 824 out_unlock_inode: 825 ocfs2_inode_unlock(inode, 1); 826 827 out: 828 ocfs2_double_unlock(old_dir, dir); 829 830 brelse(fe_bh); 831 brelse(parent_fe_bh); 832 brelse(old_dir_bh); 833 834 ocfs2_free_dir_lookup_result(&lookup); 835 836 if (err) 837 mlog_errno(err); 838 839 return err; 840 } 841 842 /* 843 * Takes and drops an exclusive lock on the given dentry. This will 844 * force other nodes to drop it. 845 */ 846 static int ocfs2_remote_dentry_delete(struct dentry *dentry) 847 { 848 int ret; 849 850 ret = ocfs2_dentry_lock(dentry, 1); 851 if (ret) 852 mlog_errno(ret); 853 else 854 ocfs2_dentry_unlock(dentry, 1); 855 856 return ret; 857 } 858 859 static inline int ocfs2_inode_is_unlinkable(struct inode *inode) 860 { 861 if (S_ISDIR(inode->i_mode)) { 862 if (inode->i_nlink == 2) 863 return 1; 864 return 0; 865 } 866 867 if (inode->i_nlink == 1) 868 return 1; 869 return 0; 870 } 871 872 static int ocfs2_unlink(struct inode *dir, 873 struct dentry *dentry) 874 { 875 int status; 876 int child_locked = 0; 877 bool is_unlinkable = false; 878 struct inode *inode = d_inode(dentry); 879 struct inode *orphan_dir = NULL; 880 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 881 u64 blkno; 882 struct ocfs2_dinode *fe = NULL; 883 struct buffer_head *fe_bh = NULL; 884 struct buffer_head *parent_node_bh = NULL; 885 handle_t *handle = NULL; 886 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 887 struct ocfs2_dir_lookup_result lookup = { NULL, }; 888 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 889 890 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, 891 dentry->d_name.name, 892 (unsigned long long)OCFS2_I(dir)->ip_blkno, 893 (unsigned long long)OCFS2_I(inode)->ip_blkno); 894 895 status = dquot_initialize(dir); 896 if (status) { 897 mlog_errno(status); 898 return status; 899 } 900 901 BUG_ON(d_inode(dentry->d_parent) != dir); 902 903 if (inode == osb->root_inode) 904 return -EPERM; 905 906 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 907 OI_LS_PARENT); 908 if (status < 0) { 909 if (status != -ENOENT) 910 mlog_errno(status); 911 return status; 912 } 913 914 status = ocfs2_find_files_on_disk(dentry->d_name.name, 915 dentry->d_name.len, &blkno, dir, 916 &lookup); 917 if (status < 0) { 918 if (status != -ENOENT) 919 mlog_errno(status); 920 goto leave; 921 } 922 923 if (OCFS2_I(inode)->ip_blkno != blkno) { 924 status = -ENOENT; 925 926 trace_ocfs2_unlink_noent( 927 (unsigned long long)OCFS2_I(inode)->ip_blkno, 928 (unsigned long long)blkno, 929 OCFS2_I(inode)->ip_flags); 930 goto leave; 931 } 932 933 status = ocfs2_inode_lock(inode, &fe_bh, 1); 934 if (status < 0) { 935 if (status != -ENOENT) 936 mlog_errno(status); 937 goto leave; 938 } 939 child_locked = 1; 940 941 if (S_ISDIR(inode->i_mode)) { 942 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 943 status = -ENOTEMPTY; 944 goto leave; 945 } 946 } 947 948 status = ocfs2_remote_dentry_delete(dentry); 949 if (status < 0) { 950 /* This remote delete should succeed under all normal 951 * circumstances. */ 952 mlog_errno(status); 953 goto leave; 954 } 955 956 if (ocfs2_inode_is_unlinkable(inode)) { 957 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 958 OCFS2_I(inode)->ip_blkno, 959 orphan_name, &orphan_insert, 960 false); 961 if (status < 0) { 962 mlog_errno(status); 963 goto leave; 964 } 965 is_unlinkable = true; 966 } 967 968 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 969 if (IS_ERR(handle)) { 970 status = PTR_ERR(handle); 971 handle = NULL; 972 mlog_errno(status); 973 goto leave; 974 } 975 976 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 977 OCFS2_JOURNAL_ACCESS_WRITE); 978 if (status < 0) { 979 mlog_errno(status); 980 goto leave; 981 } 982 983 fe = (struct ocfs2_dinode *) fe_bh->b_data; 984 985 /* delete the name from the parent dir */ 986 status = ocfs2_delete_entry(handle, dir, &lookup); 987 if (status < 0) { 988 mlog_errno(status); 989 goto leave; 990 } 991 992 if (S_ISDIR(inode->i_mode)) 993 drop_nlink(inode); 994 drop_nlink(inode); 995 ocfs2_set_links_count(fe, inode->i_nlink); 996 ocfs2_journal_dirty(handle, fe_bh); 997 998 dir->i_ctime = dir->i_mtime = current_time(dir); 999 if (S_ISDIR(inode->i_mode)) 1000 drop_nlink(dir); 1001 1002 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 1003 if (status < 0) { 1004 mlog_errno(status); 1005 if (S_ISDIR(inode->i_mode)) 1006 inc_nlink(dir); 1007 goto leave; 1008 } 1009 1010 if (is_unlinkable) { 1011 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, 1012 orphan_name, &orphan_insert, orphan_dir, false); 1013 if (status < 0) 1014 mlog_errno(status); 1015 } 1016 1017 leave: 1018 if (handle) 1019 ocfs2_commit_trans(osb, handle); 1020 1021 if (orphan_dir) { 1022 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1023 ocfs2_inode_unlock(orphan_dir, 1); 1024 inode_unlock(orphan_dir); 1025 iput(orphan_dir); 1026 } 1027 1028 if (child_locked) 1029 ocfs2_inode_unlock(inode, 1); 1030 1031 ocfs2_inode_unlock(dir, 1); 1032 1033 brelse(fe_bh); 1034 brelse(parent_node_bh); 1035 1036 ocfs2_free_dir_lookup_result(&orphan_insert); 1037 ocfs2_free_dir_lookup_result(&lookup); 1038 1039 if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) 1040 mlog_errno(status); 1041 1042 return status; 1043 } 1044 1045 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, 1046 u64 src_inode_no, u64 dest_inode_no) 1047 { 1048 int ret = 0, i = 0; 1049 u64 parent_inode_no = 0; 1050 u64 child_inode_no = src_inode_no; 1051 struct inode *child_inode; 1052 1053 #define MAX_LOOKUP_TIMES 32 1054 while (1) { 1055 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); 1056 if (IS_ERR(child_inode)) { 1057 ret = PTR_ERR(child_inode); 1058 break; 1059 } 1060 1061 ret = ocfs2_inode_lock(child_inode, NULL, 0); 1062 if (ret < 0) { 1063 iput(child_inode); 1064 if (ret != -ENOENT) 1065 mlog_errno(ret); 1066 break; 1067 } 1068 1069 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, 1070 &parent_inode_no); 1071 ocfs2_inode_unlock(child_inode, 0); 1072 iput(child_inode); 1073 if (ret < 0) { 1074 ret = -ENOENT; 1075 break; 1076 } 1077 1078 if (parent_inode_no == dest_inode_no) { 1079 ret = 1; 1080 break; 1081 } 1082 1083 if (parent_inode_no == osb->root_inode->i_ino) { 1084 ret = 0; 1085 break; 1086 } 1087 1088 child_inode_no = parent_inode_no; 1089 1090 if (++i >= MAX_LOOKUP_TIMES) { 1091 mlog_ratelimited(ML_NOTICE, "max lookup times reached, " 1092 "filesystem may have nested directories, " 1093 "src inode: %llu, dest inode: %llu.\n", 1094 (unsigned long long)src_inode_no, 1095 (unsigned long long)dest_inode_no); 1096 ret = 0; 1097 break; 1098 } 1099 } 1100 1101 return ret; 1102 } 1103 1104 /* 1105 * The only place this should be used is rename and link! 1106 * if they have the same id, then the 1st one is the only one locked. 1107 */ 1108 static int ocfs2_double_lock(struct ocfs2_super *osb, 1109 struct buffer_head **bh1, 1110 struct inode *inode1, 1111 struct buffer_head **bh2, 1112 struct inode *inode2, 1113 int rename) 1114 { 1115 int status; 1116 int inode1_is_ancestor, inode2_is_ancestor; 1117 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 1118 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 1119 1120 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 1121 (unsigned long long)oi2->ip_blkno); 1122 1123 if (*bh1) 1124 *bh1 = NULL; 1125 if (*bh2) 1126 *bh2 = NULL; 1127 1128 /* we always want to lock the one with the lower lockid first. 1129 * and if they are nested, we lock ancestor first */ 1130 if (oi1->ip_blkno != oi2->ip_blkno) { 1131 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, 1132 oi1->ip_blkno); 1133 if (inode1_is_ancestor < 0) { 1134 status = inode1_is_ancestor; 1135 goto bail; 1136 } 1137 1138 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, 1139 oi2->ip_blkno); 1140 if (inode2_is_ancestor < 0) { 1141 status = inode2_is_ancestor; 1142 goto bail; 1143 } 1144 1145 if ((inode1_is_ancestor == 1) || 1146 (oi1->ip_blkno < oi2->ip_blkno && 1147 inode2_is_ancestor == 0)) { 1148 /* switch id1 and id2 around */ 1149 swap(bh2, bh1); 1150 swap(inode2, inode1); 1151 } 1152 /* lock id2 */ 1153 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 1154 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); 1155 if (status < 0) { 1156 if (status != -ENOENT) 1157 mlog_errno(status); 1158 goto bail; 1159 } 1160 } 1161 1162 /* lock id1 */ 1163 status = ocfs2_inode_lock_nested(inode1, bh1, 1, 1164 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 1165 if (status < 0) { 1166 /* 1167 * An error return must mean that no cluster locks 1168 * were held on function exit. 1169 */ 1170 if (oi1->ip_blkno != oi2->ip_blkno) { 1171 ocfs2_inode_unlock(inode2, 1); 1172 brelse(*bh2); 1173 *bh2 = NULL; 1174 } 1175 1176 if (status != -ENOENT) 1177 mlog_errno(status); 1178 } 1179 1180 trace_ocfs2_double_lock_end( 1181 (unsigned long long)oi1->ip_blkno, 1182 (unsigned long long)oi2->ip_blkno); 1183 1184 bail: 1185 if (status) 1186 mlog_errno(status); 1187 return status; 1188 } 1189 1190 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1191 { 1192 ocfs2_inode_unlock(inode1, 1); 1193 1194 if (inode1 != inode2) 1195 ocfs2_inode_unlock(inode2, 1); 1196 } 1197 1198 static int ocfs2_rename(struct mnt_idmap *idmap, 1199 struct inode *old_dir, 1200 struct dentry *old_dentry, 1201 struct inode *new_dir, 1202 struct dentry *new_dentry, 1203 unsigned int flags) 1204 { 1205 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1206 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1207 struct inode *old_inode = d_inode(old_dentry); 1208 struct inode *new_inode = d_inode(new_dentry); 1209 struct inode *orphan_dir = NULL; 1210 struct ocfs2_dinode *newfe = NULL; 1211 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1212 struct buffer_head *newfe_bh = NULL; 1213 struct buffer_head *old_inode_bh = NULL; 1214 struct ocfs2_super *osb = NULL; 1215 u64 newfe_blkno, old_de_ino; 1216 handle_t *handle = NULL; 1217 struct buffer_head *old_dir_bh = NULL; 1218 struct buffer_head *new_dir_bh = NULL; 1219 u32 old_dir_nlink = old_dir->i_nlink; 1220 struct ocfs2_dinode *old_di; 1221 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1222 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1223 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1224 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1225 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1226 bool should_add_orphan = false; 1227 1228 if (flags) 1229 return -EINVAL; 1230 1231 /* At some point it might be nice to break this function up a 1232 * bit. */ 1233 1234 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, 1235 old_dentry->d_name.len, old_dentry->d_name.name, 1236 new_dentry->d_name.len, new_dentry->d_name.name); 1237 1238 status = dquot_initialize(old_dir); 1239 if (status) { 1240 mlog_errno(status); 1241 goto bail; 1242 } 1243 status = dquot_initialize(new_dir); 1244 if (status) { 1245 mlog_errno(status); 1246 goto bail; 1247 } 1248 1249 osb = OCFS2_SB(old_dir->i_sb); 1250 1251 if (new_inode) { 1252 if (!igrab(new_inode)) 1253 BUG(); 1254 } 1255 1256 /* Assume a directory hierarchy thusly: 1257 * a/b/c 1258 * a/d 1259 * a,b,c, and d are all directories. 1260 * 1261 * from cwd of 'a' on both nodes: 1262 * node1: mv b/c d 1263 * node2: mv d b/c 1264 * 1265 * And that's why, just like the VFS, we need a file system 1266 * rename lock. */ 1267 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1268 status = ocfs2_rename_lock(osb); 1269 if (status < 0) { 1270 mlog_errno(status); 1271 goto bail; 1272 } 1273 rename_lock = 1; 1274 1275 /* here we cannot guarantee the inodes haven't just been 1276 * changed, so check if they are nested again */ 1277 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, 1278 old_inode->i_ino); 1279 if (status < 0) { 1280 mlog_errno(status); 1281 goto bail; 1282 } else if (status == 1) { 1283 status = -EPERM; 1284 trace_ocfs2_rename_not_permitted( 1285 (unsigned long long)old_inode->i_ino, 1286 (unsigned long long)new_dir->i_ino); 1287 goto bail; 1288 } 1289 } 1290 1291 /* if old and new are the same, this'll just do one lock. */ 1292 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1293 &new_dir_bh, new_dir, 1); 1294 if (status < 0) { 1295 mlog_errno(status); 1296 goto bail; 1297 } 1298 parents_locked = 1; 1299 1300 if (!new_dir->i_nlink) { 1301 status = -EACCES; 1302 goto bail; 1303 } 1304 1305 /* make sure both dirs have bhs 1306 * get an extra ref on old_dir_bh if old==new */ 1307 if (!new_dir_bh) { 1308 if (old_dir_bh) { 1309 new_dir_bh = old_dir_bh; 1310 get_bh(new_dir_bh); 1311 } else { 1312 mlog(ML_ERROR, "no old_dir_bh!\n"); 1313 status = -EIO; 1314 goto bail; 1315 } 1316 } 1317 1318 /* 1319 * Aside from allowing a meta data update, the locking here 1320 * also ensures that the downconvert thread on other nodes 1321 * won't have to concurrently downconvert the inode and the 1322 * dentry locks. 1323 */ 1324 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1325 OI_LS_PARENT); 1326 if (status < 0) { 1327 if (status != -ENOENT) 1328 mlog_errno(status); 1329 goto bail; 1330 } 1331 old_child_locked = 1; 1332 1333 status = ocfs2_remote_dentry_delete(old_dentry); 1334 if (status < 0) { 1335 mlog_errno(status); 1336 goto bail; 1337 } 1338 1339 if (S_ISDIR(old_inode->i_mode)) { 1340 u64 old_inode_parent; 1341 1342 update_dot_dot = 1; 1343 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1344 old_inode, 1345 &old_inode_dot_dot_res); 1346 if (status) { 1347 status = -EIO; 1348 goto bail; 1349 } 1350 1351 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1352 status = -EIO; 1353 goto bail; 1354 } 1355 1356 if (!new_inode && new_dir != old_dir && 1357 new_dir->i_nlink >= ocfs2_link_max(osb)) { 1358 status = -EMLINK; 1359 goto bail; 1360 } 1361 } 1362 1363 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1364 old_dentry->d_name.len, 1365 &old_de_ino); 1366 if (status) { 1367 status = -ENOENT; 1368 goto bail; 1369 } 1370 1371 /* 1372 * Check for inode number is _not_ due to possible IO errors. 1373 * We might rmdir the source, keep it as pwd of some process 1374 * and merrily kill the link to whatever was created under the 1375 * same name. Goodbye sticky bit ;-< 1376 */ 1377 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1378 status = -ENOENT; 1379 goto bail; 1380 } 1381 1382 /* check if the target already exists (in which case we need 1383 * to delete it */ 1384 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1385 new_dentry->d_name.len, 1386 &newfe_blkno, new_dir, 1387 &target_lookup_res); 1388 /* The only error we allow here is -ENOENT because the new 1389 * file not existing is perfectly valid. */ 1390 if ((status < 0) && (status != -ENOENT)) { 1391 /* If we cannot find the file specified we should just */ 1392 /* return the error... */ 1393 mlog_errno(status); 1394 goto bail; 1395 } 1396 if (status == 0) 1397 target_exists = 1; 1398 1399 if (!target_exists && new_inode) { 1400 /* 1401 * Target was unlinked by another node while we were 1402 * waiting to get to ocfs2_rename(). There isn't 1403 * anything we can do here to help the situation, so 1404 * bubble up the appropriate error. 1405 */ 1406 status = -ENOENT; 1407 goto bail; 1408 } 1409 1410 /* In case we need to overwrite an existing file, we blow it 1411 * away first */ 1412 if (target_exists) { 1413 /* VFS didn't think there existed an inode here, but 1414 * someone else in the cluster must have raced our 1415 * rename to create one. Today we error cleanly, in 1416 * the future we should consider calling iget to build 1417 * a new struct inode for this entry. */ 1418 if (!new_inode) { 1419 status = -EACCES; 1420 1421 trace_ocfs2_rename_target_exists(new_dentry->d_name.len, 1422 new_dentry->d_name.name); 1423 goto bail; 1424 } 1425 1426 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1427 status = -EACCES; 1428 1429 trace_ocfs2_rename_disagree( 1430 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1431 (unsigned long long)newfe_blkno, 1432 OCFS2_I(new_inode)->ip_flags); 1433 goto bail; 1434 } 1435 1436 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1437 if (status < 0) { 1438 if (status != -ENOENT) 1439 mlog_errno(status); 1440 goto bail; 1441 } 1442 new_child_locked = 1; 1443 1444 status = ocfs2_remote_dentry_delete(new_dentry); 1445 if (status < 0) { 1446 mlog_errno(status); 1447 goto bail; 1448 } 1449 1450 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1451 1452 trace_ocfs2_rename_over_existing( 1453 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1454 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1455 1456 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1457 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1458 OCFS2_I(new_inode)->ip_blkno, 1459 orphan_name, &orphan_insert, 1460 false); 1461 if (status < 0) { 1462 mlog_errno(status); 1463 goto bail; 1464 } 1465 should_add_orphan = true; 1466 } 1467 } else { 1468 BUG_ON(d_inode(new_dentry->d_parent) != new_dir); 1469 1470 status = ocfs2_check_dir_for_entry(new_dir, 1471 new_dentry->d_name.name, 1472 new_dentry->d_name.len); 1473 if (status) 1474 goto bail; 1475 1476 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1477 new_dentry->d_name.name, 1478 new_dentry->d_name.len, 1479 &target_insert); 1480 if (status < 0) { 1481 mlog_errno(status); 1482 goto bail; 1483 } 1484 } 1485 1486 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1487 if (IS_ERR(handle)) { 1488 status = PTR_ERR(handle); 1489 handle = NULL; 1490 mlog_errno(status); 1491 goto bail; 1492 } 1493 1494 if (target_exists) { 1495 if (S_ISDIR(new_inode->i_mode)) { 1496 if (new_inode->i_nlink != 2 || 1497 !ocfs2_empty_dir(new_inode)) { 1498 status = -ENOTEMPTY; 1499 goto bail; 1500 } 1501 } 1502 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1503 newfe_bh, 1504 OCFS2_JOURNAL_ACCESS_WRITE); 1505 if (status < 0) { 1506 mlog_errno(status); 1507 goto bail; 1508 } 1509 1510 /* change the dirent to point to the correct inode */ 1511 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1512 old_inode); 1513 if (status < 0) { 1514 mlog_errno(status); 1515 goto bail; 1516 } 1517 inode_inc_iversion(new_dir); 1518 1519 if (S_ISDIR(new_inode->i_mode)) 1520 ocfs2_set_links_count(newfe, 0); 1521 else 1522 ocfs2_add_links_count(newfe, -1); 1523 ocfs2_journal_dirty(handle, newfe_bh); 1524 if (should_add_orphan) { 1525 status = ocfs2_orphan_add(osb, handle, new_inode, 1526 newfe_bh, orphan_name, 1527 &orphan_insert, orphan_dir, false); 1528 if (status < 0) { 1529 mlog_errno(status); 1530 goto bail; 1531 } 1532 } 1533 } else { 1534 /* if the name was not found in new_dir, add it now */ 1535 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1536 OCFS2_I(old_inode)->ip_blkno, 1537 new_dir_bh, &target_insert); 1538 } 1539 1540 old_inode->i_ctime = current_time(old_inode); 1541 mark_inode_dirty(old_inode); 1542 1543 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1544 old_inode_bh, 1545 OCFS2_JOURNAL_ACCESS_WRITE); 1546 if (status >= 0) { 1547 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1548 1549 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); 1550 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); 1551 ocfs2_journal_dirty(handle, old_inode_bh); 1552 } else 1553 mlog_errno(status); 1554 1555 /* 1556 * Now that the name has been added to new_dir, remove the old name. 1557 * 1558 * We don't keep any directory entry context around until now 1559 * because the insert might have changed the type of directory 1560 * we're dealing with. 1561 */ 1562 status = ocfs2_find_entry(old_dentry->d_name.name, 1563 old_dentry->d_name.len, old_dir, 1564 &old_entry_lookup); 1565 if (status) { 1566 if (!is_journal_aborted(osb->journal->j_journal)) { 1567 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1568 "is not deleted.", 1569 new_dentry->d_name.len, new_dentry->d_name.name, 1570 old_dentry->d_name.len, old_dentry->d_name.name); 1571 } 1572 goto bail; 1573 } 1574 1575 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1576 if (status < 0) { 1577 mlog_errno(status); 1578 if (!is_journal_aborted(osb->journal->j_journal)) { 1579 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1580 "is not deleted.", 1581 new_dentry->d_name.len, new_dentry->d_name.name, 1582 old_dentry->d_name.len, old_dentry->d_name.name); 1583 } 1584 goto bail; 1585 } 1586 1587 if (new_inode) { 1588 drop_nlink(new_inode); 1589 new_inode->i_ctime = current_time(new_inode); 1590 } 1591 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir); 1592 1593 if (update_dot_dot) { 1594 status = ocfs2_update_entry(old_inode, handle, 1595 &old_inode_dot_dot_res, new_dir); 1596 drop_nlink(old_dir); 1597 if (new_inode) { 1598 drop_nlink(new_inode); 1599 } else { 1600 inc_nlink(new_dir); 1601 mark_inode_dirty(new_dir); 1602 } 1603 } 1604 mark_inode_dirty(old_dir); 1605 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1606 if (new_inode) { 1607 mark_inode_dirty(new_inode); 1608 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1609 } 1610 1611 if (old_dir != new_dir) { 1612 /* Keep the same times on both directories.*/ 1613 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; 1614 1615 /* 1616 * This will also pick up the i_nlink change from the 1617 * block above. 1618 */ 1619 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1620 } 1621 1622 if (old_dir_nlink != old_dir->i_nlink) { 1623 if (!old_dir_bh) { 1624 mlog(ML_ERROR, "need to change nlink for old dir " 1625 "%llu from %d to %d but bh is NULL!\n", 1626 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1627 (int)old_dir_nlink, old_dir->i_nlink); 1628 } else { 1629 struct ocfs2_dinode *fe; 1630 status = ocfs2_journal_access_di(handle, 1631 INODE_CACHE(old_dir), 1632 old_dir_bh, 1633 OCFS2_JOURNAL_ACCESS_WRITE); 1634 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1635 ocfs2_set_links_count(fe, old_dir->i_nlink); 1636 ocfs2_journal_dirty(handle, old_dir_bh); 1637 } 1638 } 1639 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1640 status = 0; 1641 bail: 1642 if (handle) 1643 ocfs2_commit_trans(osb, handle); 1644 1645 if (orphan_dir) { 1646 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1647 ocfs2_inode_unlock(orphan_dir, 1); 1648 inode_unlock(orphan_dir); 1649 iput(orphan_dir); 1650 } 1651 1652 if (new_child_locked) 1653 ocfs2_inode_unlock(new_inode, 1); 1654 1655 if (old_child_locked) 1656 ocfs2_inode_unlock(old_inode, 1); 1657 1658 if (parents_locked) 1659 ocfs2_double_unlock(old_dir, new_dir); 1660 1661 if (rename_lock) 1662 ocfs2_rename_unlock(osb); 1663 1664 if (new_inode) 1665 sync_mapping_buffers(old_inode->i_mapping); 1666 1667 iput(new_inode); 1668 1669 ocfs2_free_dir_lookup_result(&target_lookup_res); 1670 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1671 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1672 ocfs2_free_dir_lookup_result(&orphan_insert); 1673 ocfs2_free_dir_lookup_result(&target_insert); 1674 1675 brelse(newfe_bh); 1676 brelse(old_inode_bh); 1677 brelse(old_dir_bh); 1678 brelse(new_dir_bh); 1679 1680 if (status) 1681 mlog_errno(status); 1682 1683 return status; 1684 } 1685 1686 /* 1687 * we expect i_size = strlen(symname). Copy symname into the file 1688 * data, including the null terminator. 1689 */ 1690 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1691 handle_t *handle, 1692 struct inode *inode, 1693 const char *symname) 1694 { 1695 struct buffer_head **bhs = NULL; 1696 const char *c; 1697 struct super_block *sb = osb->sb; 1698 u64 p_blkno, p_blocks; 1699 int virtual, blocks, status, i, bytes_left; 1700 1701 bytes_left = i_size_read(inode) + 1; 1702 /* we can't trust i_blocks because we're actually going to 1703 * write i_size + 1 bytes. */ 1704 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1705 1706 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, 1707 i_size_read(inode), blocks); 1708 1709 /* Sanity check -- make sure we're going to fit. */ 1710 if (bytes_left > 1711 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1712 status = -EIO; 1713 mlog_errno(status); 1714 goto bail; 1715 } 1716 1717 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1718 if (!bhs) { 1719 status = -ENOMEM; 1720 mlog_errno(status); 1721 goto bail; 1722 } 1723 1724 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1725 NULL); 1726 if (status < 0) { 1727 mlog_errno(status); 1728 goto bail; 1729 } 1730 1731 /* links can never be larger than one cluster so we know this 1732 * is all going to be contiguous, but do a sanity check 1733 * anyway. */ 1734 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1735 status = -EIO; 1736 mlog_errno(status); 1737 goto bail; 1738 } 1739 1740 virtual = 0; 1741 while(bytes_left > 0) { 1742 c = &symname[virtual * sb->s_blocksize]; 1743 1744 bhs[virtual] = sb_getblk(sb, p_blkno); 1745 if (!bhs[virtual]) { 1746 status = -ENOMEM; 1747 mlog_errno(status); 1748 goto bail; 1749 } 1750 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1751 bhs[virtual]); 1752 1753 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1754 bhs[virtual], 1755 OCFS2_JOURNAL_ACCESS_CREATE); 1756 if (status < 0) { 1757 mlog_errno(status); 1758 goto bail; 1759 } 1760 1761 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1762 1763 memcpy(bhs[virtual]->b_data, c, 1764 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1765 bytes_left); 1766 1767 ocfs2_journal_dirty(handle, bhs[virtual]); 1768 1769 virtual++; 1770 p_blkno++; 1771 bytes_left -= sb->s_blocksize; 1772 } 1773 1774 status = 0; 1775 bail: 1776 1777 if (bhs) { 1778 for(i = 0; i < blocks; i++) 1779 brelse(bhs[i]); 1780 kfree(bhs); 1781 } 1782 1783 if (status) 1784 mlog_errno(status); 1785 return status; 1786 } 1787 1788 static int ocfs2_symlink(struct mnt_idmap *idmap, 1789 struct inode *dir, 1790 struct dentry *dentry, 1791 const char *symname) 1792 { 1793 int status, l, credits; 1794 u64 newsize; 1795 struct ocfs2_super *osb = NULL; 1796 struct inode *inode = NULL; 1797 struct super_block *sb; 1798 struct buffer_head *new_fe_bh = NULL; 1799 struct buffer_head *parent_fe_bh = NULL; 1800 struct ocfs2_dinode *fe = NULL; 1801 struct ocfs2_dinode *dirfe; 1802 handle_t *handle = NULL; 1803 struct ocfs2_alloc_context *inode_ac = NULL; 1804 struct ocfs2_alloc_context *data_ac = NULL; 1805 struct ocfs2_alloc_context *xattr_ac = NULL; 1806 int want_clusters = 0; 1807 int xattr_credits = 0; 1808 struct ocfs2_security_xattr_info si = { 1809 .name = NULL, 1810 .enable = 1, 1811 }; 1812 int did_quota = 0, did_quota_inode = 0; 1813 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1814 sigset_t oldset; 1815 int did_block_signals = 0; 1816 struct ocfs2_dentry_lock *dl = NULL; 1817 1818 trace_ocfs2_symlink_begin(dir, dentry, symname, 1819 dentry->d_name.len, dentry->d_name.name); 1820 1821 status = dquot_initialize(dir); 1822 if (status) { 1823 mlog_errno(status); 1824 goto bail; 1825 } 1826 1827 sb = dir->i_sb; 1828 osb = OCFS2_SB(sb); 1829 1830 l = strlen(symname) + 1; 1831 1832 credits = ocfs2_calc_symlink_credits(sb); 1833 1834 /* lock the parent directory */ 1835 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1836 if (status < 0) { 1837 if (status != -ENOENT) 1838 mlog_errno(status); 1839 return status; 1840 } 1841 1842 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1843 if (!ocfs2_read_links_count(dirfe)) { 1844 /* can't make a file in a deleted directory. */ 1845 status = -ENOENT; 1846 goto bail; 1847 } 1848 1849 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1850 dentry->d_name.len); 1851 if (status) 1852 goto bail; 1853 1854 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1855 dentry->d_name.name, 1856 dentry->d_name.len, &lookup); 1857 if (status < 0) { 1858 mlog_errno(status); 1859 goto bail; 1860 } 1861 1862 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1863 if (status < 0) { 1864 if (status != -ENOSPC) 1865 mlog_errno(status); 1866 goto bail; 1867 } 1868 1869 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1870 if (IS_ERR(inode)) { 1871 status = PTR_ERR(inode); 1872 inode = NULL; 1873 mlog_errno(status); 1874 goto bail; 1875 } 1876 1877 /* get security xattr */ 1878 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1879 if (status) { 1880 if (status == -EOPNOTSUPP) 1881 si.enable = 0; 1882 else { 1883 mlog_errno(status); 1884 goto bail; 1885 } 1886 } 1887 1888 /* calculate meta data/clusters for setting security xattr */ 1889 if (si.enable) { 1890 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1891 &xattr_credits, &xattr_ac); 1892 if (status < 0) { 1893 mlog_errno(status); 1894 goto bail; 1895 } 1896 } 1897 1898 /* don't reserve bitmap space for fast symlinks. */ 1899 if (l > ocfs2_fast_symlink_chars(sb)) 1900 want_clusters += 1; 1901 1902 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1903 if (status < 0) { 1904 if (status != -ENOSPC) 1905 mlog_errno(status); 1906 goto bail; 1907 } 1908 1909 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1910 if (IS_ERR(handle)) { 1911 status = PTR_ERR(handle); 1912 handle = NULL; 1913 mlog_errno(status); 1914 goto bail; 1915 } 1916 1917 /* Starting to change things, restart is no longer possible. */ 1918 ocfs2_block_signals(&oldset); 1919 did_block_signals = 1; 1920 1921 status = dquot_alloc_inode(inode); 1922 if (status) 1923 goto bail; 1924 did_quota_inode = 1; 1925 1926 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1927 dentry->d_name.name, 1928 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1929 inode->i_mode); 1930 1931 status = ocfs2_mknod_locked(osb, dir, inode, 1932 0, &new_fe_bh, parent_fe_bh, handle, 1933 inode_ac); 1934 if (status < 0) { 1935 mlog_errno(status); 1936 goto bail; 1937 } 1938 1939 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1940 inode->i_rdev = 0; 1941 newsize = l - 1; 1942 inode->i_op = &ocfs2_symlink_inode_operations; 1943 inode_nohighmem(inode); 1944 if (l > ocfs2_fast_symlink_chars(sb)) { 1945 u32 offset = 0; 1946 1947 status = dquot_alloc_space_nodirty(inode, 1948 ocfs2_clusters_to_bytes(osb->sb, 1)); 1949 if (status) 1950 goto bail; 1951 did_quota = 1; 1952 inode->i_mapping->a_ops = &ocfs2_aops; 1953 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1954 new_fe_bh, 1955 handle, data_ac, NULL, 1956 NULL); 1957 if (status < 0) { 1958 if (status != -ENOSPC && status != -EINTR) { 1959 mlog(ML_ERROR, 1960 "Failed to extend file to %llu\n", 1961 (unsigned long long)newsize); 1962 mlog_errno(status); 1963 status = -ENOSPC; 1964 } 1965 goto bail; 1966 } 1967 i_size_write(inode, newsize); 1968 inode->i_blocks = ocfs2_inode_sector_count(inode); 1969 } else { 1970 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1971 memcpy((char *) fe->id2.i_symlink, symname, l); 1972 i_size_write(inode, newsize); 1973 inode->i_blocks = 0; 1974 } 1975 1976 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1977 if (status < 0) { 1978 mlog_errno(status); 1979 goto bail; 1980 } 1981 1982 if (!ocfs2_inode_is_fast_symlink(inode)) { 1983 status = ocfs2_create_symlink_data(osb, handle, inode, 1984 symname); 1985 if (status < 0) { 1986 mlog_errno(status); 1987 goto bail; 1988 } 1989 } 1990 1991 if (si.enable) { 1992 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 1993 xattr_ac, data_ac); 1994 if (status < 0) { 1995 mlog_errno(status); 1996 goto bail; 1997 } 1998 } 1999 2000 /* 2001 * Do this before adding the entry to the directory. We add 2002 * also set d_op after success so that ->d_iput() will cleanup 2003 * the dentry lock even if ocfs2_add_entry() fails below. 2004 */ 2005 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 2006 if (status) { 2007 mlog_errno(status); 2008 goto bail; 2009 } 2010 2011 dl = dentry->d_fsdata; 2012 2013 status = ocfs2_add_entry(handle, dentry, inode, 2014 le64_to_cpu(fe->i_blkno), parent_fe_bh, 2015 &lookup); 2016 if (status < 0) { 2017 mlog_errno(status); 2018 goto bail; 2019 } 2020 2021 insert_inode_hash(inode); 2022 d_instantiate(dentry, inode); 2023 bail: 2024 if (status < 0 && did_quota) 2025 dquot_free_space_nodirty(inode, 2026 ocfs2_clusters_to_bytes(osb->sb, 1)); 2027 if (status < 0 && did_quota_inode) 2028 dquot_free_inode(inode); 2029 if (handle) { 2030 if (status < 0 && fe) 2031 ocfs2_set_links_count(fe, 0); 2032 ocfs2_commit_trans(osb, handle); 2033 } 2034 2035 ocfs2_inode_unlock(dir, 1); 2036 if (did_block_signals) 2037 ocfs2_unblock_signals(&oldset); 2038 2039 brelse(new_fe_bh); 2040 brelse(parent_fe_bh); 2041 kfree(si.value); 2042 ocfs2_free_dir_lookup_result(&lookup); 2043 if (inode_ac) 2044 ocfs2_free_alloc_context(inode_ac); 2045 if (data_ac) 2046 ocfs2_free_alloc_context(data_ac); 2047 if (xattr_ac) 2048 ocfs2_free_alloc_context(xattr_ac); 2049 if ((status < 0) && inode) { 2050 if (dl) 2051 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 2052 2053 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 2054 clear_nlink(inode); 2055 iput(inode); 2056 } 2057 2058 if (status) 2059 mlog_errno(status); 2060 2061 return status; 2062 } 2063 2064 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2065 { 2066 int status, namelen; 2067 2068 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2069 (long long)blkno); 2070 if (namelen <= 0) { 2071 if (namelen) 2072 status = namelen; 2073 else 2074 status = -EINVAL; 2075 mlog_errno(status); 2076 goto bail; 2077 } 2078 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2079 status = -EINVAL; 2080 mlog_errno(status); 2081 goto bail; 2082 } 2083 2084 trace_ocfs2_blkno_stringify(blkno, name, namelen); 2085 2086 status = 0; 2087 bail: 2088 if (status < 0) 2089 mlog_errno(status); 2090 return status; 2091 } 2092 2093 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, 2094 struct inode **ret_orphan_dir, 2095 struct buffer_head **ret_orphan_dir_bh) 2096 { 2097 struct inode *orphan_dir_inode; 2098 struct buffer_head *orphan_dir_bh = NULL; 2099 int ret = 0; 2100 2101 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2102 ORPHAN_DIR_SYSTEM_INODE, 2103 osb->slot_num); 2104 if (!orphan_dir_inode) { 2105 ret = -ENOENT; 2106 mlog_errno(ret); 2107 return ret; 2108 } 2109 2110 inode_lock(orphan_dir_inode); 2111 2112 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2113 if (ret < 0) { 2114 inode_unlock(orphan_dir_inode); 2115 iput(orphan_dir_inode); 2116 2117 mlog_errno(ret); 2118 return ret; 2119 } 2120 2121 *ret_orphan_dir = orphan_dir_inode; 2122 *ret_orphan_dir_bh = orphan_dir_bh; 2123 2124 return 0; 2125 } 2126 2127 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, 2128 struct buffer_head *orphan_dir_bh, 2129 u64 blkno, 2130 char *name, 2131 struct ocfs2_dir_lookup_result *lookup, 2132 bool dio) 2133 { 2134 int ret; 2135 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); 2136 int namelen = dio ? 2137 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2138 OCFS2_ORPHAN_NAMELEN; 2139 2140 if (dio) { 2141 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2142 OCFS2_DIO_ORPHAN_PREFIX); 2143 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2144 ret = -EINVAL; 2145 mlog_errno(ret); 2146 return ret; 2147 } 2148 2149 ret = ocfs2_blkno_stringify(blkno, 2150 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2151 } else 2152 ret = ocfs2_blkno_stringify(blkno, name); 2153 if (ret < 0) { 2154 mlog_errno(ret); 2155 return ret; 2156 } 2157 2158 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2159 orphan_dir_bh, name, 2160 namelen, lookup); 2161 if (ret < 0) { 2162 mlog_errno(ret); 2163 return ret; 2164 } 2165 2166 return 0; 2167 } 2168 2169 /** 2170 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for 2171 * insertion of an orphan. 2172 * @osb: ocfs2 file system 2173 * @ret_orphan_dir: Orphan dir inode - returned locked! 2174 * @blkno: Actual block number of the inode to be inserted into orphan dir. 2175 * @lookup: dir lookup result, to be passed back into functions like 2176 * ocfs2_orphan_add 2177 * 2178 * Returns zero on success and the ret_orphan_dir, name and lookup 2179 * fields will be populated. 2180 * 2181 * Returns non-zero on failure. 2182 */ 2183 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2184 struct inode **ret_orphan_dir, 2185 u64 blkno, 2186 char *name, 2187 struct ocfs2_dir_lookup_result *lookup, 2188 bool dio) 2189 { 2190 struct inode *orphan_dir_inode = NULL; 2191 struct buffer_head *orphan_dir_bh = NULL; 2192 int ret = 0; 2193 2194 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, 2195 &orphan_dir_bh); 2196 if (ret < 0) { 2197 mlog_errno(ret); 2198 return ret; 2199 } 2200 2201 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, 2202 blkno, name, lookup, dio); 2203 if (ret < 0) { 2204 mlog_errno(ret); 2205 goto out; 2206 } 2207 2208 *ret_orphan_dir = orphan_dir_inode; 2209 2210 out: 2211 brelse(orphan_dir_bh); 2212 2213 if (ret) { 2214 ocfs2_inode_unlock(orphan_dir_inode, 1); 2215 inode_unlock(orphan_dir_inode); 2216 iput(orphan_dir_inode); 2217 } 2218 2219 if (ret) 2220 mlog_errno(ret); 2221 return ret; 2222 } 2223 2224 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2225 handle_t *handle, 2226 struct inode *inode, 2227 struct buffer_head *fe_bh, 2228 char *name, 2229 struct ocfs2_dir_lookup_result *lookup, 2230 struct inode *orphan_dir_inode, 2231 bool dio) 2232 { 2233 struct buffer_head *orphan_dir_bh = NULL; 2234 int status = 0; 2235 struct ocfs2_dinode *orphan_fe; 2236 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 2237 int namelen = dio ? 2238 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2239 OCFS2_ORPHAN_NAMELEN; 2240 2241 trace_ocfs2_orphan_add_begin( 2242 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2243 2244 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 2245 if (status < 0) { 2246 mlog_errno(status); 2247 goto leave; 2248 } 2249 2250 status = ocfs2_journal_access_di(handle, 2251 INODE_CACHE(orphan_dir_inode), 2252 orphan_dir_bh, 2253 OCFS2_JOURNAL_ACCESS_WRITE); 2254 if (status < 0) { 2255 mlog_errno(status); 2256 goto leave; 2257 } 2258 2259 /* 2260 * We're going to journal the change of i_flags and i_orphaned_slot. 2261 * It's safe anyway, though some callers may duplicate the journaling. 2262 * Journaling within the func just make the logic look more 2263 * straightforward. 2264 */ 2265 status = ocfs2_journal_access_di(handle, 2266 INODE_CACHE(inode), 2267 fe_bh, 2268 OCFS2_JOURNAL_ACCESS_WRITE); 2269 if (status < 0) { 2270 mlog_errno(status); 2271 goto leave; 2272 } 2273 2274 /* we're a cluster, and nlink can change on disk from 2275 * underneath us... */ 2276 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2277 if (S_ISDIR(inode->i_mode)) 2278 ocfs2_add_links_count(orphan_fe, 1); 2279 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2280 ocfs2_journal_dirty(handle, orphan_dir_bh); 2281 2282 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2283 namelen, inode, 2284 OCFS2_I(inode)->ip_blkno, 2285 orphan_dir_bh, lookup); 2286 if (status < 0) { 2287 mlog_errno(status); 2288 goto rollback; 2289 } 2290 2291 if (dio) { 2292 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan 2293 * slot. 2294 */ 2295 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2296 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); 2297 } else { 2298 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL); 2299 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; 2300 2301 /* Record which orphan dir our inode now resides 2302 * in. delete_inode will use this to determine which orphan 2303 * dir to lock. */ 2304 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2305 } 2306 2307 ocfs2_journal_dirty(handle, fe_bh); 2308 2309 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, 2310 osb->slot_num); 2311 2312 rollback: 2313 if (status < 0) { 2314 if (S_ISDIR(inode->i_mode)) 2315 ocfs2_add_links_count(orphan_fe, -1); 2316 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2317 } 2318 2319 leave: 2320 brelse(orphan_dir_bh); 2321 2322 return status; 2323 } 2324 2325 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2326 int ocfs2_orphan_del(struct ocfs2_super *osb, 2327 handle_t *handle, 2328 struct inode *orphan_dir_inode, 2329 struct inode *inode, 2330 struct buffer_head *orphan_dir_bh, 2331 bool dio) 2332 { 2333 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2334 struct ocfs2_dinode *orphan_fe; 2335 int status = 0; 2336 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2337 2338 if (dio) { 2339 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2340 OCFS2_DIO_ORPHAN_PREFIX); 2341 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2342 status = -EINVAL; 2343 mlog_errno(status); 2344 return status; 2345 } 2346 2347 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, 2348 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2349 } else 2350 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2351 if (status < 0) { 2352 mlog_errno(status); 2353 goto leave; 2354 } 2355 2356 trace_ocfs2_orphan_del( 2357 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2358 name, strlen(name)); 2359 2360 status = ocfs2_journal_access_di(handle, 2361 INODE_CACHE(orphan_dir_inode), 2362 orphan_dir_bh, 2363 OCFS2_JOURNAL_ACCESS_WRITE); 2364 if (status < 0) { 2365 mlog_errno(status); 2366 goto leave; 2367 } 2368 2369 /* find it's spot in the orphan directory */ 2370 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode, 2371 &lookup); 2372 if (status) { 2373 mlog_errno(status); 2374 goto leave; 2375 } 2376 2377 /* remove it from the orphan directory */ 2378 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); 2379 if (status < 0) { 2380 mlog_errno(status); 2381 goto leave; 2382 } 2383 2384 /* do the i_nlink dance! :) */ 2385 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2386 if (S_ISDIR(inode->i_mode)) 2387 ocfs2_add_links_count(orphan_fe, -1); 2388 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2389 ocfs2_journal_dirty(handle, orphan_dir_bh); 2390 2391 leave: 2392 ocfs2_free_dir_lookup_result(&lookup); 2393 2394 if (status) 2395 mlog_errno(status); 2396 return status; 2397 } 2398 2399 /** 2400 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly 2401 * allocated file. This is different from the typical 'add to orphan dir' 2402 * operation in that the inode does not yet exist. This is a problem because 2403 * the orphan dir stringifies the inode block number to come up with it's 2404 * dirent. Obviously if the inode does not yet exist we have a chicken and egg 2405 * problem. This function works around it by calling deeper into the orphan 2406 * and suballoc code than other callers. Use this only by necessity. 2407 * @dir: The directory which this inode will ultimately wind up under - not the 2408 * orphan dir! 2409 * @dir_bh: buffer_head the @dir inode block 2410 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled 2411 * with the string to be used for orphan dirent. Pass back to the orphan dir 2412 * code. 2413 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan 2414 * dir code. 2415 * @ret_di_blkno: block number where the new inode will be allocated. 2416 * @orphan_insert: Dir insert context to be passed back into orphan dir code. 2417 * @ret_inode_ac: Inode alloc context to be passed back to the allocator. 2418 * 2419 * Returns zero on success and the ret_orphan_dir, name and lookup 2420 * fields will be populated. 2421 * 2422 * Returns non-zero on failure. 2423 */ 2424 static int ocfs2_prep_new_orphaned_file(struct inode *dir, 2425 struct buffer_head *dir_bh, 2426 char *orphan_name, 2427 struct inode **ret_orphan_dir, 2428 u64 *ret_di_blkno, 2429 struct ocfs2_dir_lookup_result *orphan_insert, 2430 struct ocfs2_alloc_context **ret_inode_ac) 2431 { 2432 int ret; 2433 u64 di_blkno; 2434 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2435 struct inode *orphan_dir = NULL; 2436 struct buffer_head *orphan_dir_bh = NULL; 2437 struct ocfs2_alloc_context *inode_ac = NULL; 2438 2439 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); 2440 if (ret < 0) { 2441 mlog_errno(ret); 2442 return ret; 2443 } 2444 2445 /* reserve an inode spot */ 2446 ret = ocfs2_reserve_new_inode(osb, &inode_ac); 2447 if (ret < 0) { 2448 if (ret != -ENOSPC) 2449 mlog_errno(ret); 2450 goto out; 2451 } 2452 2453 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, 2454 &di_blkno); 2455 if (ret) { 2456 mlog_errno(ret); 2457 goto out; 2458 } 2459 2460 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, 2461 di_blkno, orphan_name, orphan_insert, 2462 false); 2463 if (ret < 0) { 2464 mlog_errno(ret); 2465 goto out; 2466 } 2467 2468 out: 2469 if (ret == 0) { 2470 *ret_orphan_dir = orphan_dir; 2471 *ret_di_blkno = di_blkno; 2472 *ret_inode_ac = inode_ac; 2473 /* 2474 * orphan_name and orphan_insert are already up to 2475 * date via prepare_orphan_dir 2476 */ 2477 } else { 2478 /* Unroll reserve_new_inode* */ 2479 if (inode_ac) 2480 ocfs2_free_alloc_context(inode_ac); 2481 2482 /* Unroll orphan dir locking */ 2483 inode_unlock(orphan_dir); 2484 ocfs2_inode_unlock(orphan_dir, 1); 2485 iput(orphan_dir); 2486 } 2487 2488 brelse(orphan_dir_bh); 2489 2490 return ret; 2491 } 2492 2493 int ocfs2_create_inode_in_orphan(struct inode *dir, 2494 int mode, 2495 struct inode **new_inode) 2496 { 2497 int status, did_quota_inode = 0; 2498 struct inode *inode = NULL; 2499 struct inode *orphan_dir = NULL; 2500 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2501 handle_t *handle = NULL; 2502 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2503 struct buffer_head *parent_di_bh = NULL; 2504 struct buffer_head *new_di_bh = NULL; 2505 struct ocfs2_alloc_context *inode_ac = NULL; 2506 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2507 u64 di_blkno, suballoc_loc; 2508 u16 suballoc_bit; 2509 2510 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2511 if (status < 0) { 2512 if (status != -ENOENT) 2513 mlog_errno(status); 2514 return status; 2515 } 2516 2517 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, 2518 orphan_name, &orphan_dir, 2519 &di_blkno, &orphan_insert, &inode_ac); 2520 if (status < 0) { 2521 if (status != -ENOSPC) 2522 mlog_errno(status); 2523 goto leave; 2524 } 2525 2526 inode = ocfs2_get_init_inode(dir, mode); 2527 if (IS_ERR(inode)) { 2528 status = PTR_ERR(inode); 2529 inode = NULL; 2530 mlog_errno(status); 2531 goto leave; 2532 } 2533 2534 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2535 if (IS_ERR(handle)) { 2536 status = PTR_ERR(handle); 2537 handle = NULL; 2538 mlog_errno(status); 2539 goto leave; 2540 } 2541 2542 status = dquot_alloc_inode(inode); 2543 if (status) 2544 goto leave; 2545 did_quota_inode = 1; 2546 2547 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, 2548 &suballoc_loc, 2549 &suballoc_bit, di_blkno); 2550 if (status < 0) { 2551 mlog_errno(status); 2552 goto leave; 2553 } 2554 2555 clear_nlink(inode); 2556 /* do the real work now. */ 2557 status = __ocfs2_mknod_locked(dir, inode, 2558 0, &new_di_bh, parent_di_bh, handle, 2559 inode_ac, di_blkno, suballoc_loc, 2560 suballoc_bit); 2561 if (status < 0) { 2562 mlog_errno(status); 2563 goto leave; 2564 } 2565 2566 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, 2567 &orphan_insert, orphan_dir, false); 2568 if (status < 0) { 2569 mlog_errno(status); 2570 goto leave; 2571 } 2572 2573 /* get open lock so that only nodes can't remove it from orphan dir. */ 2574 status = ocfs2_open_lock(inode); 2575 if (status < 0) 2576 mlog_errno(status); 2577 2578 insert_inode_hash(inode); 2579 leave: 2580 if (status < 0 && did_quota_inode) 2581 dquot_free_inode(inode); 2582 if (handle) 2583 ocfs2_commit_trans(osb, handle); 2584 2585 if (orphan_dir) { 2586 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2587 ocfs2_inode_unlock(orphan_dir, 1); 2588 inode_unlock(orphan_dir); 2589 iput(orphan_dir); 2590 } 2591 2592 if ((status < 0) && inode) { 2593 clear_nlink(inode); 2594 iput(inode); 2595 } 2596 2597 if (inode_ac) 2598 ocfs2_free_alloc_context(inode_ac); 2599 2600 brelse(new_di_bh); 2601 2602 if (!status) 2603 *new_inode = inode; 2604 2605 ocfs2_free_dir_lookup_result(&orphan_insert); 2606 2607 ocfs2_inode_unlock(dir, 1); 2608 brelse(parent_di_bh); 2609 return status; 2610 } 2611 2612 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, 2613 struct inode *inode) 2614 { 2615 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2616 struct inode *orphan_dir_inode = NULL; 2617 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2618 struct buffer_head *di_bh = NULL; 2619 int status = 0; 2620 handle_t *handle = NULL; 2621 struct ocfs2_dinode *di = NULL; 2622 2623 status = ocfs2_inode_lock(inode, &di_bh, 1); 2624 if (status < 0) { 2625 mlog_errno(status); 2626 goto bail; 2627 } 2628 2629 di = (struct ocfs2_dinode *) di_bh->b_data; 2630 /* 2631 * Another append dio crashed? 2632 * If so, manually recover it first. 2633 */ 2634 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 2635 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode)); 2636 if (status < 0) { 2637 if (status != -ENOSPC) 2638 mlog_errno(status); 2639 goto bail_unlock_inode; 2640 } 2641 2642 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0); 2643 if (status < 0) { 2644 mlog_errno(status); 2645 goto bail_unlock_inode; 2646 } 2647 } 2648 2649 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, 2650 OCFS2_I(inode)->ip_blkno, 2651 orphan_name, 2652 &orphan_insert, 2653 true); 2654 if (status < 0) { 2655 mlog_errno(status); 2656 goto bail_unlock_inode; 2657 } 2658 2659 handle = ocfs2_start_trans(osb, 2660 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); 2661 if (IS_ERR(handle)) { 2662 status = PTR_ERR(handle); 2663 goto bail_unlock_orphan; 2664 } 2665 2666 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, 2667 &orphan_insert, orphan_dir_inode, true); 2668 if (status) 2669 mlog_errno(status); 2670 2671 ocfs2_commit_trans(osb, handle); 2672 2673 bail_unlock_orphan: 2674 ocfs2_inode_unlock(orphan_dir_inode, 1); 2675 inode_unlock(orphan_dir_inode); 2676 iput(orphan_dir_inode); 2677 2678 ocfs2_free_dir_lookup_result(&orphan_insert); 2679 2680 bail_unlock_inode: 2681 ocfs2_inode_unlock(inode, 1); 2682 brelse(di_bh); 2683 2684 bail: 2685 return status; 2686 } 2687 2688 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, 2689 struct inode *inode, struct buffer_head *di_bh, 2690 int update_isize, loff_t end) 2691 { 2692 struct inode *orphan_dir_inode = NULL; 2693 struct buffer_head *orphan_dir_bh = NULL; 2694 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2695 handle_t *handle = NULL; 2696 int status = 0; 2697 2698 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2699 ORPHAN_DIR_SYSTEM_INODE, 2700 le16_to_cpu(di->i_dio_orphaned_slot)); 2701 if (!orphan_dir_inode) { 2702 status = -ENOENT; 2703 mlog_errno(status); 2704 goto bail; 2705 } 2706 2707 inode_lock(orphan_dir_inode); 2708 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2709 if (status < 0) { 2710 inode_unlock(orphan_dir_inode); 2711 iput(orphan_dir_inode); 2712 mlog_errno(status); 2713 goto bail; 2714 } 2715 2716 handle = ocfs2_start_trans(osb, 2717 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); 2718 if (IS_ERR(handle)) { 2719 status = PTR_ERR(handle); 2720 goto bail_unlock_orphan; 2721 } 2722 2723 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); 2724 2725 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, 2726 inode, orphan_dir_bh, true); 2727 if (status < 0) { 2728 mlog_errno(status); 2729 goto bail_commit; 2730 } 2731 2732 status = ocfs2_journal_access_di(handle, 2733 INODE_CACHE(inode), 2734 di_bh, 2735 OCFS2_JOURNAL_ACCESS_WRITE); 2736 if (status < 0) { 2737 mlog_errno(status); 2738 goto bail_commit; 2739 } 2740 2741 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2742 di->i_dio_orphaned_slot = 0; 2743 2744 if (update_isize) { 2745 status = ocfs2_set_inode_size(handle, inode, di_bh, end); 2746 if (status) 2747 mlog_errno(status); 2748 } else 2749 ocfs2_journal_dirty(handle, di_bh); 2750 2751 bail_commit: 2752 ocfs2_commit_trans(osb, handle); 2753 2754 bail_unlock_orphan: 2755 ocfs2_inode_unlock(orphan_dir_inode, 1); 2756 inode_unlock(orphan_dir_inode); 2757 brelse(orphan_dir_bh); 2758 iput(orphan_dir_inode); 2759 2760 bail: 2761 return status; 2762 } 2763 2764 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2765 struct inode *inode, 2766 struct dentry *dentry) 2767 { 2768 int status = 0; 2769 struct buffer_head *parent_di_bh = NULL; 2770 handle_t *handle = NULL; 2771 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2772 struct ocfs2_dinode *dir_di, *di; 2773 struct inode *orphan_dir_inode = NULL; 2774 struct buffer_head *orphan_dir_bh = NULL; 2775 struct buffer_head *di_bh = NULL; 2776 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2777 2778 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, 2779 dentry->d_name.len, dentry->d_name.name, 2780 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2781 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2782 2783 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2784 if (status < 0) { 2785 if (status != -ENOENT) 2786 mlog_errno(status); 2787 return status; 2788 } 2789 2790 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2791 if (!dir_di->i_links_count) { 2792 /* can't make a file in a deleted directory. */ 2793 status = -ENOENT; 2794 goto leave; 2795 } 2796 2797 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2798 dentry->d_name.len); 2799 if (status) 2800 goto leave; 2801 2802 /* get a spot inside the dir. */ 2803 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2804 dentry->d_name.name, 2805 dentry->d_name.len, &lookup); 2806 if (status < 0) { 2807 mlog_errno(status); 2808 goto leave; 2809 } 2810 2811 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2812 ORPHAN_DIR_SYSTEM_INODE, 2813 osb->slot_num); 2814 if (!orphan_dir_inode) { 2815 status = -ENOENT; 2816 mlog_errno(status); 2817 goto leave; 2818 } 2819 2820 inode_lock(orphan_dir_inode); 2821 2822 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2823 if (status < 0) { 2824 mlog_errno(status); 2825 inode_unlock(orphan_dir_inode); 2826 iput(orphan_dir_inode); 2827 goto leave; 2828 } 2829 2830 status = ocfs2_read_inode_block(inode, &di_bh); 2831 if (status < 0) { 2832 mlog_errno(status); 2833 goto orphan_unlock; 2834 } 2835 2836 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2837 if (IS_ERR(handle)) { 2838 status = PTR_ERR(handle); 2839 handle = NULL; 2840 mlog_errno(status); 2841 goto orphan_unlock; 2842 } 2843 2844 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2845 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2846 if (status < 0) { 2847 mlog_errno(status); 2848 goto out_commit; 2849 } 2850 2851 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2852 orphan_dir_bh, false); 2853 if (status < 0) { 2854 mlog_errno(status); 2855 goto out_commit; 2856 } 2857 2858 di = (struct ocfs2_dinode *)di_bh->b_data; 2859 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); 2860 di->i_orphaned_slot = 0; 2861 set_nlink(inode, 1); 2862 ocfs2_set_links_count(di, inode->i_nlink); 2863 ocfs2_update_inode_fsync_trans(handle, inode, 1); 2864 ocfs2_journal_dirty(handle, di_bh); 2865 2866 status = ocfs2_add_entry(handle, dentry, inode, 2867 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2868 &lookup); 2869 if (status < 0) { 2870 mlog_errno(status); 2871 goto out_commit; 2872 } 2873 2874 status = ocfs2_dentry_attach_lock(dentry, inode, 2875 OCFS2_I(dir)->ip_blkno); 2876 if (status) { 2877 mlog_errno(status); 2878 goto out_commit; 2879 } 2880 2881 d_instantiate(dentry, inode); 2882 status = 0; 2883 out_commit: 2884 ocfs2_commit_trans(osb, handle); 2885 orphan_unlock: 2886 ocfs2_inode_unlock(orphan_dir_inode, 1); 2887 inode_unlock(orphan_dir_inode); 2888 iput(orphan_dir_inode); 2889 leave: 2890 2891 ocfs2_inode_unlock(dir, 1); 2892 2893 brelse(di_bh); 2894 brelse(parent_di_bh); 2895 brelse(orphan_dir_bh); 2896 2897 ocfs2_free_dir_lookup_result(&lookup); 2898 2899 if (status) 2900 mlog_errno(status); 2901 2902 return status; 2903 } 2904 2905 const struct inode_operations ocfs2_dir_iops = { 2906 .create = ocfs2_create, 2907 .lookup = ocfs2_lookup, 2908 .link = ocfs2_link, 2909 .unlink = ocfs2_unlink, 2910 .rmdir = ocfs2_unlink, 2911 .symlink = ocfs2_symlink, 2912 .mkdir = ocfs2_mkdir, 2913 .mknod = ocfs2_mknod, 2914 .rename = ocfs2_rename, 2915 .setattr = ocfs2_setattr, 2916 .getattr = ocfs2_getattr, 2917 .permission = ocfs2_permission, 2918 .listxattr = ocfs2_listxattr, 2919 .fiemap = ocfs2_fiemap, 2920 .get_inode_acl = ocfs2_iop_get_acl, 2921 .set_acl = ocfs2_iop_set_acl, 2922 .fileattr_get = ocfs2_fileattr_get, 2923 .fileattr_set = ocfs2_fileattr_set, 2924 }; 2925