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 inode_init_owner(&init_user_ns, inode, dir, mode); 201 status = dquot_initialize(inode); 202 if (status) 203 return ERR_PTR(status); 204 205 return inode; 206 } 207 208 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb, 209 struct dentry *dentry, struct inode *inode) 210 { 211 struct ocfs2_dentry_lock *dl = dentry->d_fsdata; 212 213 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres); 214 ocfs2_lock_res_free(&dl->dl_lockres); 215 BUG_ON(dl->dl_count != 1); 216 spin_lock(&dentry_attach_lock); 217 dentry->d_fsdata = NULL; 218 spin_unlock(&dentry_attach_lock); 219 kfree(dl); 220 iput(inode); 221 } 222 223 static int ocfs2_mknod(struct user_namespace *mnt_userns, 224 struct inode *dir, 225 struct dentry *dentry, 226 umode_t mode, 227 dev_t dev) 228 { 229 int status = 0; 230 struct buffer_head *parent_fe_bh = NULL; 231 handle_t *handle = NULL; 232 struct ocfs2_super *osb; 233 struct ocfs2_dinode *dirfe; 234 struct buffer_head *new_fe_bh = NULL; 235 struct inode *inode = NULL; 236 struct ocfs2_alloc_context *inode_ac = NULL; 237 struct ocfs2_alloc_context *data_ac = NULL; 238 struct ocfs2_alloc_context *meta_ac = NULL; 239 int want_clusters = 0; 240 int want_meta = 0; 241 int xattr_credits = 0; 242 struct ocfs2_security_xattr_info si = { 243 .enable = 1, 244 }; 245 int did_quota_inode = 0; 246 struct ocfs2_dir_lookup_result lookup = { NULL, }; 247 sigset_t oldset; 248 int did_block_signals = 0; 249 struct ocfs2_dentry_lock *dl = NULL; 250 251 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name, 252 (unsigned long long)OCFS2_I(dir)->ip_blkno, 253 (unsigned long)dev, mode); 254 255 status = dquot_initialize(dir); 256 if (status) { 257 mlog_errno(status); 258 return status; 259 } 260 261 /* get our super block */ 262 osb = OCFS2_SB(dir->i_sb); 263 264 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 265 if (status < 0) { 266 if (status != -ENOENT) 267 mlog_errno(status); 268 return status; 269 } 270 271 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) { 272 status = -EMLINK; 273 goto leave; 274 } 275 276 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 277 if (!ocfs2_read_links_count(dirfe)) { 278 /* can't make a file in a deleted directory. */ 279 status = -ENOENT; 280 goto leave; 281 } 282 283 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 284 dentry->d_name.len); 285 if (status) 286 goto leave; 287 288 /* get a spot inside the dir. */ 289 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 290 dentry->d_name.name, 291 dentry->d_name.len, &lookup); 292 if (status < 0) { 293 mlog_errno(status); 294 goto leave; 295 } 296 297 /* reserve an inode spot */ 298 status = ocfs2_reserve_new_inode(osb, &inode_ac); 299 if (status < 0) { 300 if (status != -ENOSPC) 301 mlog_errno(status); 302 goto leave; 303 } 304 305 inode = ocfs2_get_init_inode(dir, mode); 306 if (IS_ERR(inode)) { 307 status = PTR_ERR(inode); 308 inode = NULL; 309 mlog_errno(status); 310 goto leave; 311 } 312 313 /* get security xattr */ 314 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 315 if (status) { 316 if (status == -EOPNOTSUPP) 317 si.enable = 0; 318 else { 319 mlog_errno(status); 320 goto leave; 321 } 322 } 323 324 /* calculate meta data/clusters for setting security and acl xattr */ 325 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode, 326 &si, &want_clusters, 327 &xattr_credits, &want_meta); 328 if (status < 0) { 329 mlog_errno(status); 330 goto leave; 331 } 332 333 /* Reserve a cluster if creating an extent based directory. */ 334 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { 335 want_clusters += 1; 336 337 /* Dir indexing requires extra space as well */ 338 if (ocfs2_supports_indexed_dirs(osb)) 339 want_meta++; 340 } 341 342 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac); 343 if (status < 0) { 344 if (status != -ENOSPC) 345 mlog_errno(status); 346 goto leave; 347 } 348 349 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 350 if (status < 0) { 351 if (status != -ENOSPC) 352 mlog_errno(status); 353 goto leave; 354 } 355 356 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 357 S_ISDIR(mode), 358 xattr_credits)); 359 if (IS_ERR(handle)) { 360 status = PTR_ERR(handle); 361 handle = NULL; 362 mlog_errno(status); 363 goto leave; 364 } 365 366 /* Starting to change things, restart is no longer possible. */ 367 ocfs2_block_signals(&oldset); 368 did_block_signals = 1; 369 370 status = dquot_alloc_inode(inode); 371 if (status) 372 goto leave; 373 did_quota_inode = 1; 374 375 /* do the real work now. */ 376 status = ocfs2_mknod_locked(osb, dir, inode, dev, 377 &new_fe_bh, parent_fe_bh, handle, 378 inode_ac); 379 if (status < 0) { 380 mlog_errno(status); 381 goto leave; 382 } 383 384 if (S_ISDIR(mode)) { 385 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 386 new_fe_bh, data_ac, meta_ac); 387 if (status < 0) { 388 mlog_errno(status); 389 goto leave; 390 } 391 392 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir), 393 parent_fe_bh, 394 OCFS2_JOURNAL_ACCESS_WRITE); 395 if (status < 0) { 396 mlog_errno(status); 397 goto leave; 398 } 399 ocfs2_add_links_count(dirfe, 1); 400 ocfs2_journal_dirty(handle, parent_fe_bh); 401 inc_nlink(dir); 402 } 403 404 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh, 405 meta_ac, data_ac); 406 407 if (status < 0) { 408 mlog_errno(status); 409 goto roll_back; 410 } 411 412 if (si.enable) { 413 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 414 meta_ac, data_ac); 415 if (status < 0) { 416 mlog_errno(status); 417 goto roll_back; 418 } 419 } 420 421 /* 422 * Do this before adding the entry to the directory. We add 423 * also set d_op after success so that ->d_iput() will cleanup 424 * the dentry lock even if ocfs2_add_entry() fails below. 425 */ 426 status = ocfs2_dentry_attach_lock(dentry, inode, 427 OCFS2_I(dir)->ip_blkno); 428 if (status) { 429 mlog_errno(status); 430 goto roll_back; 431 } 432 433 dl = dentry->d_fsdata; 434 435 status = ocfs2_add_entry(handle, dentry, inode, 436 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 437 &lookup); 438 if (status < 0) { 439 mlog_errno(status); 440 goto roll_back; 441 } 442 443 insert_inode_hash(inode); 444 d_instantiate(dentry, inode); 445 status = 0; 446 447 roll_back: 448 if (status < 0 && S_ISDIR(mode)) { 449 ocfs2_add_links_count(dirfe, -1); 450 drop_nlink(dir); 451 } 452 453 leave: 454 if (status < 0 && did_quota_inode) 455 dquot_free_inode(inode); 456 if (handle) 457 ocfs2_commit_trans(osb, handle); 458 459 ocfs2_inode_unlock(dir, 1); 460 if (did_block_signals) 461 ocfs2_unblock_signals(&oldset); 462 463 brelse(new_fe_bh); 464 brelse(parent_fe_bh); 465 kfree(si.value); 466 467 ocfs2_free_dir_lookup_result(&lookup); 468 469 if (inode_ac) 470 ocfs2_free_alloc_context(inode_ac); 471 472 if (data_ac) 473 ocfs2_free_alloc_context(data_ac); 474 475 if (meta_ac) 476 ocfs2_free_alloc_context(meta_ac); 477 478 /* 479 * We should call iput after the i_mutex of the bitmap been 480 * unlocked in ocfs2_free_alloc_context, or the 481 * ocfs2_delete_inode will mutex_lock again. 482 */ 483 if ((status < 0) && inode) { 484 if (dl) 485 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 486 487 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 488 clear_nlink(inode); 489 iput(inode); 490 } 491 492 if (status) 493 mlog_errno(status); 494 495 return status; 496 } 497 498 static int __ocfs2_mknod_locked(struct inode *dir, 499 struct inode *inode, 500 dev_t dev, 501 struct buffer_head **new_fe_bh, 502 struct buffer_head *parent_fe_bh, 503 handle_t *handle, 504 struct ocfs2_alloc_context *inode_ac, 505 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit) 506 { 507 int status = 0; 508 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 509 struct ocfs2_dinode *fe = NULL; 510 struct ocfs2_extent_list *fel; 511 u16 feat; 512 struct ocfs2_inode_info *oi = OCFS2_I(inode); 513 struct timespec64 ts; 514 515 *new_fe_bh = NULL; 516 517 /* populate as many fields early on as possible - many of 518 * these are used by the support functions here and in 519 * callers. */ 520 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 521 oi->ip_blkno = fe_blkno; 522 spin_lock(&osb->osb_lock); 523 inode->i_generation = osb->s_next_generation++; 524 spin_unlock(&osb->osb_lock); 525 526 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 527 if (!*new_fe_bh) { 528 status = -ENOMEM; 529 mlog_errno(status); 530 goto leave; 531 } 532 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh); 533 534 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 535 *new_fe_bh, 536 OCFS2_JOURNAL_ACCESS_CREATE); 537 if (status < 0) { 538 mlog_errno(status); 539 goto leave; 540 } 541 542 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 543 memset(fe, 0, osb->sb->s_blocksize); 544 545 fe->i_generation = cpu_to_le32(inode->i_generation); 546 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 547 fe->i_blkno = cpu_to_le64(fe_blkno); 548 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc); 549 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 550 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); 551 fe->i_uid = cpu_to_le32(i_uid_read(inode)); 552 fe->i_gid = cpu_to_le32(i_gid_read(inode)); 553 fe->i_mode = cpu_to_le16(inode->i_mode); 554 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 555 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 556 557 ocfs2_set_links_count(fe, inode->i_nlink); 558 559 fe->i_last_eb_blk = 0; 560 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 561 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL); 562 ktime_get_real_ts64(&ts); 563 fe->i_atime = fe->i_ctime = fe->i_mtime = 564 cpu_to_le64(ts.tv_sec); 565 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 566 cpu_to_le32(ts.tv_nsec); 567 fe->i_dtime = 0; 568 569 /* 570 * If supported, directories start with inline data. If inline 571 * isn't supported, but indexing is, we start them as indexed. 572 */ 573 feat = le16_to_cpu(fe->i_dyn_features); 574 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) { 575 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); 576 577 fe->id2.i_data.id_count = cpu_to_le16( 578 ocfs2_max_inline_data_with_xattr(osb->sb, fe)); 579 } else { 580 fel = &fe->id2.i_list; 581 fel->l_tree_depth = 0; 582 fel->l_next_free_rec = 0; 583 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 584 } 585 586 ocfs2_journal_dirty(handle, *new_fe_bh); 587 588 ocfs2_populate_inode(inode, fe, 1); 589 ocfs2_ci_set_new(osb, INODE_CACHE(inode)); 590 if (!ocfs2_mount_local(osb)) { 591 status = ocfs2_create_new_inode_locks(inode); 592 if (status < 0) 593 mlog_errno(status); 594 } 595 596 ocfs2_update_inode_fsync_trans(handle, inode, 1); 597 598 leave: 599 if (status < 0) { 600 if (*new_fe_bh) { 601 brelse(*new_fe_bh); 602 *new_fe_bh = NULL; 603 } 604 } 605 606 if (status) 607 mlog_errno(status); 608 return status; 609 } 610 611 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 612 struct inode *dir, 613 struct inode *inode, 614 dev_t dev, 615 struct buffer_head **new_fe_bh, 616 struct buffer_head *parent_fe_bh, 617 handle_t *handle, 618 struct ocfs2_alloc_context *inode_ac) 619 { 620 int status = 0; 621 u64 suballoc_loc, fe_blkno = 0; 622 u16 suballoc_bit; 623 624 *new_fe_bh = NULL; 625 626 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh, 627 inode_ac, &suballoc_loc, 628 &suballoc_bit, &fe_blkno); 629 if (status < 0) { 630 mlog_errno(status); 631 return status; 632 } 633 634 status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, 635 parent_fe_bh, handle, inode_ac, 636 fe_blkno, suballoc_loc, suballoc_bit); 637 if (status < 0) { 638 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit); 639 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode, 640 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1); 641 if (tmp) 642 mlog_errno(tmp); 643 } 644 645 return status; 646 } 647 648 static int ocfs2_mkdir(struct user_namespace *mnt_userns, 649 struct inode *dir, 650 struct dentry *dentry, 651 umode_t mode) 652 { 653 int ret; 654 655 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, 656 OCFS2_I(dir)->ip_blkno, mode); 657 ret = ocfs2_mknod(&init_user_ns, dir, dentry, mode | S_IFDIR, 0); 658 if (ret) 659 mlog_errno(ret); 660 661 return ret; 662 } 663 664 static int ocfs2_create(struct user_namespace *mnt_userns, 665 struct inode *dir, 666 struct dentry *dentry, 667 umode_t mode, 668 bool excl) 669 { 670 int ret; 671 672 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name, 673 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode); 674 ret = ocfs2_mknod(&init_user_ns, dir, dentry, mode | S_IFREG, 0); 675 if (ret) 676 mlog_errno(ret); 677 678 return ret; 679 } 680 681 static int ocfs2_link(struct dentry *old_dentry, 682 struct inode *dir, 683 struct dentry *dentry) 684 { 685 handle_t *handle; 686 struct inode *inode = d_inode(old_dentry); 687 struct inode *old_dir = d_inode(old_dentry->d_parent); 688 int err; 689 struct buffer_head *fe_bh = NULL; 690 struct buffer_head *old_dir_bh = NULL; 691 struct buffer_head *parent_fe_bh = NULL; 692 struct ocfs2_dinode *fe = NULL; 693 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 694 struct ocfs2_dir_lookup_result lookup = { NULL, }; 695 sigset_t oldset; 696 u64 old_de_ino; 697 698 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno, 699 old_dentry->d_name.len, old_dentry->d_name.name, 700 dentry->d_name.len, dentry->d_name.name); 701 702 if (S_ISDIR(inode->i_mode)) 703 return -EPERM; 704 705 err = dquot_initialize(dir); 706 if (err) { 707 mlog_errno(err); 708 return err; 709 } 710 711 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 712 &parent_fe_bh, dir, 0); 713 if (err < 0) { 714 if (err != -ENOENT) 715 mlog_errno(err); 716 return err; 717 } 718 719 /* make sure both dirs have bhs 720 * get an extra ref on old_dir_bh if old==new */ 721 if (!parent_fe_bh) { 722 if (old_dir_bh) { 723 parent_fe_bh = old_dir_bh; 724 get_bh(parent_fe_bh); 725 } else { 726 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str); 727 err = -EIO; 728 goto out; 729 } 730 } 731 732 if (!dir->i_nlink) { 733 err = -ENOENT; 734 goto out; 735 } 736 737 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 738 old_dentry->d_name.len, &old_de_ino); 739 if (err) { 740 err = -ENOENT; 741 goto out; 742 } 743 744 /* 745 * Check whether another node removed the source inode while we 746 * were in the vfs. 747 */ 748 if (old_de_ino != OCFS2_I(inode)->ip_blkno) { 749 err = -ENOENT; 750 goto out; 751 } 752 753 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 754 dentry->d_name.len); 755 if (err) 756 goto out; 757 758 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 759 dentry->d_name.name, 760 dentry->d_name.len, &lookup); 761 if (err < 0) { 762 mlog_errno(err); 763 goto out; 764 } 765 766 err = ocfs2_inode_lock(inode, &fe_bh, 1); 767 if (err < 0) { 768 if (err != -ENOENT) 769 mlog_errno(err); 770 goto out; 771 } 772 773 fe = (struct ocfs2_dinode *) fe_bh->b_data; 774 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { 775 err = -EMLINK; 776 goto out_unlock_inode; 777 } 778 779 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); 780 if (IS_ERR(handle)) { 781 err = PTR_ERR(handle); 782 handle = NULL; 783 mlog_errno(err); 784 goto out_unlock_inode; 785 } 786 787 /* Starting to change things, restart is no longer possible. */ 788 ocfs2_block_signals(&oldset); 789 790 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 791 OCFS2_JOURNAL_ACCESS_WRITE); 792 if (err < 0) { 793 mlog_errno(err); 794 goto out_commit; 795 } 796 797 inc_nlink(inode); 798 inode->i_ctime = current_time(inode); 799 ocfs2_set_links_count(fe, inode->i_nlink); 800 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 801 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 802 ocfs2_journal_dirty(handle, fe_bh); 803 804 err = ocfs2_add_entry(handle, dentry, inode, 805 OCFS2_I(inode)->ip_blkno, 806 parent_fe_bh, &lookup); 807 if (err) { 808 ocfs2_add_links_count(fe, -1); 809 drop_nlink(inode); 810 mlog_errno(err); 811 goto out_commit; 812 } 813 814 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 815 if (err) { 816 mlog_errno(err); 817 goto out_commit; 818 } 819 820 ihold(inode); 821 d_instantiate(dentry, inode); 822 823 out_commit: 824 ocfs2_commit_trans(osb, handle); 825 ocfs2_unblock_signals(&oldset); 826 out_unlock_inode: 827 ocfs2_inode_unlock(inode, 1); 828 829 out: 830 ocfs2_double_unlock(old_dir, dir); 831 832 brelse(fe_bh); 833 brelse(parent_fe_bh); 834 brelse(old_dir_bh); 835 836 ocfs2_free_dir_lookup_result(&lookup); 837 838 if (err) 839 mlog_errno(err); 840 841 return err; 842 } 843 844 /* 845 * Takes and drops an exclusive lock on the given dentry. This will 846 * force other nodes to drop it. 847 */ 848 static int ocfs2_remote_dentry_delete(struct dentry *dentry) 849 { 850 int ret; 851 852 ret = ocfs2_dentry_lock(dentry, 1); 853 if (ret) 854 mlog_errno(ret); 855 else 856 ocfs2_dentry_unlock(dentry, 1); 857 858 return ret; 859 } 860 861 static inline int ocfs2_inode_is_unlinkable(struct inode *inode) 862 { 863 if (S_ISDIR(inode->i_mode)) { 864 if (inode->i_nlink == 2) 865 return 1; 866 return 0; 867 } 868 869 if (inode->i_nlink == 1) 870 return 1; 871 return 0; 872 } 873 874 static int ocfs2_unlink(struct inode *dir, 875 struct dentry *dentry) 876 { 877 int status; 878 int child_locked = 0; 879 bool is_unlinkable = false; 880 struct inode *inode = d_inode(dentry); 881 struct inode *orphan_dir = NULL; 882 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 883 u64 blkno; 884 struct ocfs2_dinode *fe = NULL; 885 struct buffer_head *fe_bh = NULL; 886 struct buffer_head *parent_node_bh = NULL; 887 handle_t *handle = NULL; 888 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 889 struct ocfs2_dir_lookup_result lookup = { NULL, }; 890 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 891 892 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, 893 dentry->d_name.name, 894 (unsigned long long)OCFS2_I(dir)->ip_blkno, 895 (unsigned long long)OCFS2_I(inode)->ip_blkno); 896 897 status = dquot_initialize(dir); 898 if (status) { 899 mlog_errno(status); 900 return status; 901 } 902 903 BUG_ON(d_inode(dentry->d_parent) != dir); 904 905 if (inode == osb->root_inode) 906 return -EPERM; 907 908 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 909 OI_LS_PARENT); 910 if (status < 0) { 911 if (status != -ENOENT) 912 mlog_errno(status); 913 return status; 914 } 915 916 status = ocfs2_find_files_on_disk(dentry->d_name.name, 917 dentry->d_name.len, &blkno, dir, 918 &lookup); 919 if (status < 0) { 920 if (status != -ENOENT) 921 mlog_errno(status); 922 goto leave; 923 } 924 925 if (OCFS2_I(inode)->ip_blkno != blkno) { 926 status = -ENOENT; 927 928 trace_ocfs2_unlink_noent( 929 (unsigned long long)OCFS2_I(inode)->ip_blkno, 930 (unsigned long long)blkno, 931 OCFS2_I(inode)->ip_flags); 932 goto leave; 933 } 934 935 status = ocfs2_inode_lock(inode, &fe_bh, 1); 936 if (status < 0) { 937 if (status != -ENOENT) 938 mlog_errno(status); 939 goto leave; 940 } 941 child_locked = 1; 942 943 if (S_ISDIR(inode->i_mode)) { 944 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 945 status = -ENOTEMPTY; 946 goto leave; 947 } 948 } 949 950 status = ocfs2_remote_dentry_delete(dentry); 951 if (status < 0) { 952 /* This remote delete should succeed under all normal 953 * circumstances. */ 954 mlog_errno(status); 955 goto leave; 956 } 957 958 if (ocfs2_inode_is_unlinkable(inode)) { 959 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 960 OCFS2_I(inode)->ip_blkno, 961 orphan_name, &orphan_insert, 962 false); 963 if (status < 0) { 964 mlog_errno(status); 965 goto leave; 966 } 967 is_unlinkable = true; 968 } 969 970 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 971 if (IS_ERR(handle)) { 972 status = PTR_ERR(handle); 973 handle = NULL; 974 mlog_errno(status); 975 goto leave; 976 } 977 978 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 979 OCFS2_JOURNAL_ACCESS_WRITE); 980 if (status < 0) { 981 mlog_errno(status); 982 goto leave; 983 } 984 985 fe = (struct ocfs2_dinode *) fe_bh->b_data; 986 987 /* delete the name from the parent dir */ 988 status = ocfs2_delete_entry(handle, dir, &lookup); 989 if (status < 0) { 990 mlog_errno(status); 991 goto leave; 992 } 993 994 if (S_ISDIR(inode->i_mode)) 995 drop_nlink(inode); 996 drop_nlink(inode); 997 ocfs2_set_links_count(fe, inode->i_nlink); 998 ocfs2_journal_dirty(handle, fe_bh); 999 1000 dir->i_ctime = dir->i_mtime = current_time(dir); 1001 if (S_ISDIR(inode->i_mode)) 1002 drop_nlink(dir); 1003 1004 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 1005 if (status < 0) { 1006 mlog_errno(status); 1007 if (S_ISDIR(inode->i_mode)) 1008 inc_nlink(dir); 1009 goto leave; 1010 } 1011 1012 if (is_unlinkable) { 1013 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, 1014 orphan_name, &orphan_insert, orphan_dir, false); 1015 if (status < 0) 1016 mlog_errno(status); 1017 } 1018 1019 leave: 1020 if (handle) 1021 ocfs2_commit_trans(osb, handle); 1022 1023 if (orphan_dir) { 1024 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1025 ocfs2_inode_unlock(orphan_dir, 1); 1026 inode_unlock(orphan_dir); 1027 iput(orphan_dir); 1028 } 1029 1030 if (child_locked) 1031 ocfs2_inode_unlock(inode, 1); 1032 1033 ocfs2_inode_unlock(dir, 1); 1034 1035 brelse(fe_bh); 1036 brelse(parent_node_bh); 1037 1038 ocfs2_free_dir_lookup_result(&orphan_insert); 1039 ocfs2_free_dir_lookup_result(&lookup); 1040 1041 if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) 1042 mlog_errno(status); 1043 1044 return status; 1045 } 1046 1047 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, 1048 u64 src_inode_no, u64 dest_inode_no) 1049 { 1050 int ret = 0, i = 0; 1051 u64 parent_inode_no = 0; 1052 u64 child_inode_no = src_inode_no; 1053 struct inode *child_inode; 1054 1055 #define MAX_LOOKUP_TIMES 32 1056 while (1) { 1057 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); 1058 if (IS_ERR(child_inode)) { 1059 ret = PTR_ERR(child_inode); 1060 break; 1061 } 1062 1063 ret = ocfs2_inode_lock(child_inode, NULL, 0); 1064 if (ret < 0) { 1065 iput(child_inode); 1066 if (ret != -ENOENT) 1067 mlog_errno(ret); 1068 break; 1069 } 1070 1071 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, 1072 &parent_inode_no); 1073 ocfs2_inode_unlock(child_inode, 0); 1074 iput(child_inode); 1075 if (ret < 0) { 1076 ret = -ENOENT; 1077 break; 1078 } 1079 1080 if (parent_inode_no == dest_inode_no) { 1081 ret = 1; 1082 break; 1083 } 1084 1085 if (parent_inode_no == osb->root_inode->i_ino) { 1086 ret = 0; 1087 break; 1088 } 1089 1090 child_inode_no = parent_inode_no; 1091 1092 if (++i >= MAX_LOOKUP_TIMES) { 1093 mlog_ratelimited(ML_NOTICE, "max lookup times reached, " 1094 "filesystem may have nested directories, " 1095 "src inode: %llu, dest inode: %llu.\n", 1096 (unsigned long long)src_inode_no, 1097 (unsigned long long)dest_inode_no); 1098 ret = 0; 1099 break; 1100 } 1101 } 1102 1103 return ret; 1104 } 1105 1106 /* 1107 * The only place this should be used is rename and link! 1108 * if they have the same id, then the 1st one is the only one locked. 1109 */ 1110 static int ocfs2_double_lock(struct ocfs2_super *osb, 1111 struct buffer_head **bh1, 1112 struct inode *inode1, 1113 struct buffer_head **bh2, 1114 struct inode *inode2, 1115 int rename) 1116 { 1117 int status; 1118 int inode1_is_ancestor, inode2_is_ancestor; 1119 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 1120 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 1121 1122 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 1123 (unsigned long long)oi2->ip_blkno); 1124 1125 if (*bh1) 1126 *bh1 = NULL; 1127 if (*bh2) 1128 *bh2 = NULL; 1129 1130 /* we always want to lock the one with the lower lockid first. 1131 * and if they are nested, we lock ancestor first */ 1132 if (oi1->ip_blkno != oi2->ip_blkno) { 1133 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, 1134 oi1->ip_blkno); 1135 if (inode1_is_ancestor < 0) { 1136 status = inode1_is_ancestor; 1137 goto bail; 1138 } 1139 1140 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, 1141 oi2->ip_blkno); 1142 if (inode2_is_ancestor < 0) { 1143 status = inode2_is_ancestor; 1144 goto bail; 1145 } 1146 1147 if ((inode1_is_ancestor == 1) || 1148 (oi1->ip_blkno < oi2->ip_blkno && 1149 inode2_is_ancestor == 0)) { 1150 /* switch id1 and id2 around */ 1151 swap(bh2, bh1); 1152 swap(inode2, inode1); 1153 } 1154 /* lock id2 */ 1155 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 1156 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); 1157 if (status < 0) { 1158 if (status != -ENOENT) 1159 mlog_errno(status); 1160 goto bail; 1161 } 1162 } 1163 1164 /* lock id1 */ 1165 status = ocfs2_inode_lock_nested(inode1, bh1, 1, 1166 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 1167 if (status < 0) { 1168 /* 1169 * An error return must mean that no cluster locks 1170 * were held on function exit. 1171 */ 1172 if (oi1->ip_blkno != oi2->ip_blkno) { 1173 ocfs2_inode_unlock(inode2, 1); 1174 brelse(*bh2); 1175 *bh2 = NULL; 1176 } 1177 1178 if (status != -ENOENT) 1179 mlog_errno(status); 1180 } 1181 1182 trace_ocfs2_double_lock_end( 1183 (unsigned long long)oi1->ip_blkno, 1184 (unsigned long long)oi2->ip_blkno); 1185 1186 bail: 1187 if (status) 1188 mlog_errno(status); 1189 return status; 1190 } 1191 1192 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1193 { 1194 ocfs2_inode_unlock(inode1, 1); 1195 1196 if (inode1 != inode2) 1197 ocfs2_inode_unlock(inode2, 1); 1198 } 1199 1200 static int ocfs2_rename(struct user_namespace *mnt_userns, 1201 struct inode *old_dir, 1202 struct dentry *old_dentry, 1203 struct inode *new_dir, 1204 struct dentry *new_dentry, 1205 unsigned int flags) 1206 { 1207 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1208 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1209 struct inode *old_inode = d_inode(old_dentry); 1210 struct inode *new_inode = d_inode(new_dentry); 1211 struct inode *orphan_dir = NULL; 1212 struct ocfs2_dinode *newfe = NULL; 1213 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1214 struct buffer_head *newfe_bh = NULL; 1215 struct buffer_head *old_inode_bh = NULL; 1216 struct ocfs2_super *osb = NULL; 1217 u64 newfe_blkno, old_de_ino; 1218 handle_t *handle = NULL; 1219 struct buffer_head *old_dir_bh = NULL; 1220 struct buffer_head *new_dir_bh = NULL; 1221 u32 old_dir_nlink = old_dir->i_nlink; 1222 struct ocfs2_dinode *old_di; 1223 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1224 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1225 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1226 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1227 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1228 bool should_add_orphan = false; 1229 1230 if (flags) 1231 return -EINVAL; 1232 1233 /* At some point it might be nice to break this function up a 1234 * bit. */ 1235 1236 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, 1237 old_dentry->d_name.len, old_dentry->d_name.name, 1238 new_dentry->d_name.len, new_dentry->d_name.name); 1239 1240 status = dquot_initialize(old_dir); 1241 if (status) { 1242 mlog_errno(status); 1243 goto bail; 1244 } 1245 status = dquot_initialize(new_dir); 1246 if (status) { 1247 mlog_errno(status); 1248 goto bail; 1249 } 1250 1251 osb = OCFS2_SB(old_dir->i_sb); 1252 1253 if (new_inode) { 1254 if (!igrab(new_inode)) 1255 BUG(); 1256 } 1257 1258 /* Assume a directory hierarchy thusly: 1259 * a/b/c 1260 * a/d 1261 * a,b,c, and d are all directories. 1262 * 1263 * from cwd of 'a' on both nodes: 1264 * node1: mv b/c d 1265 * node2: mv d b/c 1266 * 1267 * And that's why, just like the VFS, we need a file system 1268 * rename lock. */ 1269 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1270 status = ocfs2_rename_lock(osb); 1271 if (status < 0) { 1272 mlog_errno(status); 1273 goto bail; 1274 } 1275 rename_lock = 1; 1276 1277 /* here we cannot guarantee the inodes haven't just been 1278 * changed, so check if they are nested again */ 1279 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, 1280 old_inode->i_ino); 1281 if (status < 0) { 1282 mlog_errno(status); 1283 goto bail; 1284 } else if (status == 1) { 1285 status = -EPERM; 1286 trace_ocfs2_rename_not_permitted( 1287 (unsigned long long)old_inode->i_ino, 1288 (unsigned long long)new_dir->i_ino); 1289 goto bail; 1290 } 1291 } 1292 1293 /* if old and new are the same, this'll just do one lock. */ 1294 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1295 &new_dir_bh, new_dir, 1); 1296 if (status < 0) { 1297 mlog_errno(status); 1298 goto bail; 1299 } 1300 parents_locked = 1; 1301 1302 if (!new_dir->i_nlink) { 1303 status = -EACCES; 1304 goto bail; 1305 } 1306 1307 /* make sure both dirs have bhs 1308 * get an extra ref on old_dir_bh if old==new */ 1309 if (!new_dir_bh) { 1310 if (old_dir_bh) { 1311 new_dir_bh = old_dir_bh; 1312 get_bh(new_dir_bh); 1313 } else { 1314 mlog(ML_ERROR, "no old_dir_bh!\n"); 1315 status = -EIO; 1316 goto bail; 1317 } 1318 } 1319 1320 /* 1321 * Aside from allowing a meta data update, the locking here 1322 * also ensures that the downconvert thread on other nodes 1323 * won't have to concurrently downconvert the inode and the 1324 * dentry locks. 1325 */ 1326 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1327 OI_LS_PARENT); 1328 if (status < 0) { 1329 if (status != -ENOENT) 1330 mlog_errno(status); 1331 goto bail; 1332 } 1333 old_child_locked = 1; 1334 1335 status = ocfs2_remote_dentry_delete(old_dentry); 1336 if (status < 0) { 1337 mlog_errno(status); 1338 goto bail; 1339 } 1340 1341 if (S_ISDIR(old_inode->i_mode)) { 1342 u64 old_inode_parent; 1343 1344 update_dot_dot = 1; 1345 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1346 old_inode, 1347 &old_inode_dot_dot_res); 1348 if (status) { 1349 status = -EIO; 1350 goto bail; 1351 } 1352 1353 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1354 status = -EIO; 1355 goto bail; 1356 } 1357 1358 if (!new_inode && new_dir != old_dir && 1359 new_dir->i_nlink >= ocfs2_link_max(osb)) { 1360 status = -EMLINK; 1361 goto bail; 1362 } 1363 } 1364 1365 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1366 old_dentry->d_name.len, 1367 &old_de_ino); 1368 if (status) { 1369 status = -ENOENT; 1370 goto bail; 1371 } 1372 1373 /* 1374 * Check for inode number is _not_ due to possible IO errors. 1375 * We might rmdir the source, keep it as pwd of some process 1376 * and merrily kill the link to whatever was created under the 1377 * same name. Goodbye sticky bit ;-< 1378 */ 1379 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1380 status = -ENOENT; 1381 goto bail; 1382 } 1383 1384 /* check if the target already exists (in which case we need 1385 * to delete it */ 1386 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1387 new_dentry->d_name.len, 1388 &newfe_blkno, new_dir, 1389 &target_lookup_res); 1390 /* The only error we allow here is -ENOENT because the new 1391 * file not existing is perfectly valid. */ 1392 if ((status < 0) && (status != -ENOENT)) { 1393 /* If we cannot find the file specified we should just */ 1394 /* return the error... */ 1395 mlog_errno(status); 1396 goto bail; 1397 } 1398 if (status == 0) 1399 target_exists = 1; 1400 1401 if (!target_exists && new_inode) { 1402 /* 1403 * Target was unlinked by another node while we were 1404 * waiting to get to ocfs2_rename(). There isn't 1405 * anything we can do here to help the situation, so 1406 * bubble up the appropriate error. 1407 */ 1408 status = -ENOENT; 1409 goto bail; 1410 } 1411 1412 /* In case we need to overwrite an existing file, we blow it 1413 * away first */ 1414 if (target_exists) { 1415 /* VFS didn't think there existed an inode here, but 1416 * someone else in the cluster must have raced our 1417 * rename to create one. Today we error cleanly, in 1418 * the future we should consider calling iget to build 1419 * a new struct inode for this entry. */ 1420 if (!new_inode) { 1421 status = -EACCES; 1422 1423 trace_ocfs2_rename_target_exists(new_dentry->d_name.len, 1424 new_dentry->d_name.name); 1425 goto bail; 1426 } 1427 1428 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1429 status = -EACCES; 1430 1431 trace_ocfs2_rename_disagree( 1432 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1433 (unsigned long long)newfe_blkno, 1434 OCFS2_I(new_inode)->ip_flags); 1435 goto bail; 1436 } 1437 1438 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1439 if (status < 0) { 1440 if (status != -ENOENT) 1441 mlog_errno(status); 1442 goto bail; 1443 } 1444 new_child_locked = 1; 1445 1446 status = ocfs2_remote_dentry_delete(new_dentry); 1447 if (status < 0) { 1448 mlog_errno(status); 1449 goto bail; 1450 } 1451 1452 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1453 1454 trace_ocfs2_rename_over_existing( 1455 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1456 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1457 1458 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1459 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1460 OCFS2_I(new_inode)->ip_blkno, 1461 orphan_name, &orphan_insert, 1462 false); 1463 if (status < 0) { 1464 mlog_errno(status); 1465 goto bail; 1466 } 1467 should_add_orphan = true; 1468 } 1469 } else { 1470 BUG_ON(d_inode(new_dentry->d_parent) != new_dir); 1471 1472 status = ocfs2_check_dir_for_entry(new_dir, 1473 new_dentry->d_name.name, 1474 new_dentry->d_name.len); 1475 if (status) 1476 goto bail; 1477 1478 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1479 new_dentry->d_name.name, 1480 new_dentry->d_name.len, 1481 &target_insert); 1482 if (status < 0) { 1483 mlog_errno(status); 1484 goto bail; 1485 } 1486 } 1487 1488 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1489 if (IS_ERR(handle)) { 1490 status = PTR_ERR(handle); 1491 handle = NULL; 1492 mlog_errno(status); 1493 goto bail; 1494 } 1495 1496 if (target_exists) { 1497 if (S_ISDIR(new_inode->i_mode)) { 1498 if (new_inode->i_nlink != 2 || 1499 !ocfs2_empty_dir(new_inode)) { 1500 status = -ENOTEMPTY; 1501 goto bail; 1502 } 1503 } 1504 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1505 newfe_bh, 1506 OCFS2_JOURNAL_ACCESS_WRITE); 1507 if (status < 0) { 1508 mlog_errno(status); 1509 goto bail; 1510 } 1511 1512 /* change the dirent to point to the correct inode */ 1513 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1514 old_inode); 1515 if (status < 0) { 1516 mlog_errno(status); 1517 goto bail; 1518 } 1519 inode_inc_iversion(new_dir); 1520 1521 if (S_ISDIR(new_inode->i_mode)) 1522 ocfs2_set_links_count(newfe, 0); 1523 else 1524 ocfs2_add_links_count(newfe, -1); 1525 ocfs2_journal_dirty(handle, newfe_bh); 1526 if (should_add_orphan) { 1527 status = ocfs2_orphan_add(osb, handle, new_inode, 1528 newfe_bh, orphan_name, 1529 &orphan_insert, orphan_dir, false); 1530 if (status < 0) { 1531 mlog_errno(status); 1532 goto bail; 1533 } 1534 } 1535 } else { 1536 /* if the name was not found in new_dir, add it now */ 1537 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1538 OCFS2_I(old_inode)->ip_blkno, 1539 new_dir_bh, &target_insert); 1540 } 1541 1542 old_inode->i_ctime = current_time(old_inode); 1543 mark_inode_dirty(old_inode); 1544 1545 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1546 old_inode_bh, 1547 OCFS2_JOURNAL_ACCESS_WRITE); 1548 if (status >= 0) { 1549 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1550 1551 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); 1552 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); 1553 ocfs2_journal_dirty(handle, old_inode_bh); 1554 } else 1555 mlog_errno(status); 1556 1557 /* 1558 * Now that the name has been added to new_dir, remove the old name. 1559 * 1560 * We don't keep any directory entry context around until now 1561 * because the insert might have changed the type of directory 1562 * we're dealing with. 1563 */ 1564 status = ocfs2_find_entry(old_dentry->d_name.name, 1565 old_dentry->d_name.len, old_dir, 1566 &old_entry_lookup); 1567 if (status) { 1568 if (!is_journal_aborted(osb->journal->j_journal)) { 1569 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1570 "is not deleted.", 1571 new_dentry->d_name.len, new_dentry->d_name.name, 1572 old_dentry->d_name.len, old_dentry->d_name.name); 1573 } 1574 goto bail; 1575 } 1576 1577 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1578 if (status < 0) { 1579 mlog_errno(status); 1580 if (!is_journal_aborted(osb->journal->j_journal)) { 1581 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1582 "is not deleted.", 1583 new_dentry->d_name.len, new_dentry->d_name.name, 1584 old_dentry->d_name.len, old_dentry->d_name.name); 1585 } 1586 goto bail; 1587 } 1588 1589 if (new_inode) { 1590 drop_nlink(new_inode); 1591 new_inode->i_ctime = current_time(new_inode); 1592 } 1593 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir); 1594 1595 if (update_dot_dot) { 1596 status = ocfs2_update_entry(old_inode, handle, 1597 &old_inode_dot_dot_res, new_dir); 1598 drop_nlink(old_dir); 1599 if (new_inode) { 1600 drop_nlink(new_inode); 1601 } else { 1602 inc_nlink(new_dir); 1603 mark_inode_dirty(new_dir); 1604 } 1605 } 1606 mark_inode_dirty(old_dir); 1607 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1608 if (new_inode) { 1609 mark_inode_dirty(new_inode); 1610 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1611 } 1612 1613 if (old_dir != new_dir) { 1614 /* Keep the same times on both directories.*/ 1615 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; 1616 1617 /* 1618 * This will also pick up the i_nlink change from the 1619 * block above. 1620 */ 1621 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1622 } 1623 1624 if (old_dir_nlink != old_dir->i_nlink) { 1625 if (!old_dir_bh) { 1626 mlog(ML_ERROR, "need to change nlink for old dir " 1627 "%llu from %d to %d but bh is NULL!\n", 1628 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1629 (int)old_dir_nlink, old_dir->i_nlink); 1630 } else { 1631 struct ocfs2_dinode *fe; 1632 status = ocfs2_journal_access_di(handle, 1633 INODE_CACHE(old_dir), 1634 old_dir_bh, 1635 OCFS2_JOURNAL_ACCESS_WRITE); 1636 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1637 ocfs2_set_links_count(fe, old_dir->i_nlink); 1638 ocfs2_journal_dirty(handle, old_dir_bh); 1639 } 1640 } 1641 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1642 status = 0; 1643 bail: 1644 if (handle) 1645 ocfs2_commit_trans(osb, handle); 1646 1647 if (orphan_dir) { 1648 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1649 ocfs2_inode_unlock(orphan_dir, 1); 1650 inode_unlock(orphan_dir); 1651 iput(orphan_dir); 1652 } 1653 1654 if (new_child_locked) 1655 ocfs2_inode_unlock(new_inode, 1); 1656 1657 if (old_child_locked) 1658 ocfs2_inode_unlock(old_inode, 1); 1659 1660 if (parents_locked) 1661 ocfs2_double_unlock(old_dir, new_dir); 1662 1663 if (rename_lock) 1664 ocfs2_rename_unlock(osb); 1665 1666 if (new_inode) 1667 sync_mapping_buffers(old_inode->i_mapping); 1668 1669 iput(new_inode); 1670 1671 ocfs2_free_dir_lookup_result(&target_lookup_res); 1672 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1673 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1674 ocfs2_free_dir_lookup_result(&orphan_insert); 1675 ocfs2_free_dir_lookup_result(&target_insert); 1676 1677 brelse(newfe_bh); 1678 brelse(old_inode_bh); 1679 brelse(old_dir_bh); 1680 brelse(new_dir_bh); 1681 1682 if (status) 1683 mlog_errno(status); 1684 1685 return status; 1686 } 1687 1688 /* 1689 * we expect i_size = strlen(symname). Copy symname into the file 1690 * data, including the null terminator. 1691 */ 1692 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1693 handle_t *handle, 1694 struct inode *inode, 1695 const char *symname) 1696 { 1697 struct buffer_head **bhs = NULL; 1698 const char *c; 1699 struct super_block *sb = osb->sb; 1700 u64 p_blkno, p_blocks; 1701 int virtual, blocks, status, i, bytes_left; 1702 1703 bytes_left = i_size_read(inode) + 1; 1704 /* we can't trust i_blocks because we're actually going to 1705 * write i_size + 1 bytes. */ 1706 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1707 1708 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, 1709 i_size_read(inode), blocks); 1710 1711 /* Sanity check -- make sure we're going to fit. */ 1712 if (bytes_left > 1713 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1714 status = -EIO; 1715 mlog_errno(status); 1716 goto bail; 1717 } 1718 1719 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1720 if (!bhs) { 1721 status = -ENOMEM; 1722 mlog_errno(status); 1723 goto bail; 1724 } 1725 1726 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1727 NULL); 1728 if (status < 0) { 1729 mlog_errno(status); 1730 goto bail; 1731 } 1732 1733 /* links can never be larger than one cluster so we know this 1734 * is all going to be contiguous, but do a sanity check 1735 * anyway. */ 1736 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1737 status = -EIO; 1738 mlog_errno(status); 1739 goto bail; 1740 } 1741 1742 virtual = 0; 1743 while(bytes_left > 0) { 1744 c = &symname[virtual * sb->s_blocksize]; 1745 1746 bhs[virtual] = sb_getblk(sb, p_blkno); 1747 if (!bhs[virtual]) { 1748 status = -ENOMEM; 1749 mlog_errno(status); 1750 goto bail; 1751 } 1752 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1753 bhs[virtual]); 1754 1755 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1756 bhs[virtual], 1757 OCFS2_JOURNAL_ACCESS_CREATE); 1758 if (status < 0) { 1759 mlog_errno(status); 1760 goto bail; 1761 } 1762 1763 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1764 1765 memcpy(bhs[virtual]->b_data, c, 1766 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1767 bytes_left); 1768 1769 ocfs2_journal_dirty(handle, bhs[virtual]); 1770 1771 virtual++; 1772 p_blkno++; 1773 bytes_left -= sb->s_blocksize; 1774 } 1775 1776 status = 0; 1777 bail: 1778 1779 if (bhs) { 1780 for(i = 0; i < blocks; i++) 1781 brelse(bhs[i]); 1782 kfree(bhs); 1783 } 1784 1785 if (status) 1786 mlog_errno(status); 1787 return status; 1788 } 1789 1790 static int ocfs2_symlink(struct user_namespace *mnt_userns, 1791 struct inode *dir, 1792 struct dentry *dentry, 1793 const char *symname) 1794 { 1795 int status, l, credits; 1796 u64 newsize; 1797 struct ocfs2_super *osb = NULL; 1798 struct inode *inode = NULL; 1799 struct super_block *sb; 1800 struct buffer_head *new_fe_bh = NULL; 1801 struct buffer_head *parent_fe_bh = NULL; 1802 struct ocfs2_dinode *fe = NULL; 1803 struct ocfs2_dinode *dirfe; 1804 handle_t *handle = NULL; 1805 struct ocfs2_alloc_context *inode_ac = NULL; 1806 struct ocfs2_alloc_context *data_ac = NULL; 1807 struct ocfs2_alloc_context *xattr_ac = NULL; 1808 int want_clusters = 0; 1809 int xattr_credits = 0; 1810 struct ocfs2_security_xattr_info si = { 1811 .enable = 1, 1812 }; 1813 int did_quota = 0, did_quota_inode = 0; 1814 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1815 sigset_t oldset; 1816 int did_block_signals = 0; 1817 struct ocfs2_dentry_lock *dl = NULL; 1818 1819 trace_ocfs2_symlink_begin(dir, dentry, symname, 1820 dentry->d_name.len, dentry->d_name.name); 1821 1822 status = dquot_initialize(dir); 1823 if (status) { 1824 mlog_errno(status); 1825 goto bail; 1826 } 1827 1828 sb = dir->i_sb; 1829 osb = OCFS2_SB(sb); 1830 1831 l = strlen(symname) + 1; 1832 1833 credits = ocfs2_calc_symlink_credits(sb); 1834 1835 /* lock the parent directory */ 1836 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1837 if (status < 0) { 1838 if (status != -ENOENT) 1839 mlog_errno(status); 1840 return status; 1841 } 1842 1843 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1844 if (!ocfs2_read_links_count(dirfe)) { 1845 /* can't make a file in a deleted directory. */ 1846 status = -ENOENT; 1847 goto bail; 1848 } 1849 1850 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1851 dentry->d_name.len); 1852 if (status) 1853 goto bail; 1854 1855 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1856 dentry->d_name.name, 1857 dentry->d_name.len, &lookup); 1858 if (status < 0) { 1859 mlog_errno(status); 1860 goto bail; 1861 } 1862 1863 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1864 if (status < 0) { 1865 if (status != -ENOSPC) 1866 mlog_errno(status); 1867 goto bail; 1868 } 1869 1870 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1871 if (IS_ERR(inode)) { 1872 status = PTR_ERR(inode); 1873 inode = NULL; 1874 mlog_errno(status); 1875 goto bail; 1876 } 1877 1878 /* get security xattr */ 1879 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1880 if (status) { 1881 if (status == -EOPNOTSUPP) 1882 si.enable = 0; 1883 else { 1884 mlog_errno(status); 1885 goto bail; 1886 } 1887 } 1888 1889 /* calculate meta data/clusters for setting security xattr */ 1890 if (si.enable) { 1891 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1892 &xattr_credits, &xattr_ac); 1893 if (status < 0) { 1894 mlog_errno(status); 1895 goto bail; 1896 } 1897 } 1898 1899 /* don't reserve bitmap space for fast symlinks. */ 1900 if (l > ocfs2_fast_symlink_chars(sb)) 1901 want_clusters += 1; 1902 1903 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1904 if (status < 0) { 1905 if (status != -ENOSPC) 1906 mlog_errno(status); 1907 goto bail; 1908 } 1909 1910 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1911 if (IS_ERR(handle)) { 1912 status = PTR_ERR(handle); 1913 handle = NULL; 1914 mlog_errno(status); 1915 goto bail; 1916 } 1917 1918 /* Starting to change things, restart is no longer possible. */ 1919 ocfs2_block_signals(&oldset); 1920 did_block_signals = 1; 1921 1922 status = dquot_alloc_inode(inode); 1923 if (status) 1924 goto bail; 1925 did_quota_inode = 1; 1926 1927 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1928 dentry->d_name.name, 1929 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1930 inode->i_mode); 1931 1932 status = ocfs2_mknod_locked(osb, dir, inode, 1933 0, &new_fe_bh, parent_fe_bh, handle, 1934 inode_ac); 1935 if (status < 0) { 1936 mlog_errno(status); 1937 goto bail; 1938 } 1939 1940 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1941 inode->i_rdev = 0; 1942 newsize = l - 1; 1943 inode->i_op = &ocfs2_symlink_inode_operations; 1944 inode_nohighmem(inode); 1945 if (l > ocfs2_fast_symlink_chars(sb)) { 1946 u32 offset = 0; 1947 1948 status = dquot_alloc_space_nodirty(inode, 1949 ocfs2_clusters_to_bytes(osb->sb, 1)); 1950 if (status) 1951 goto bail; 1952 did_quota = 1; 1953 inode->i_mapping->a_ops = &ocfs2_aops; 1954 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1955 new_fe_bh, 1956 handle, data_ac, NULL, 1957 NULL); 1958 if (status < 0) { 1959 if (status != -ENOSPC && status != -EINTR) { 1960 mlog(ML_ERROR, 1961 "Failed to extend file to %llu\n", 1962 (unsigned long long)newsize); 1963 mlog_errno(status); 1964 status = -ENOSPC; 1965 } 1966 goto bail; 1967 } 1968 i_size_write(inode, newsize); 1969 inode->i_blocks = ocfs2_inode_sector_count(inode); 1970 } else { 1971 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1972 memcpy((char *) fe->id2.i_symlink, symname, l); 1973 i_size_write(inode, newsize); 1974 inode->i_blocks = 0; 1975 } 1976 1977 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1978 if (status < 0) { 1979 mlog_errno(status); 1980 goto bail; 1981 } 1982 1983 if (!ocfs2_inode_is_fast_symlink(inode)) { 1984 status = ocfs2_create_symlink_data(osb, handle, inode, 1985 symname); 1986 if (status < 0) { 1987 mlog_errno(status); 1988 goto bail; 1989 } 1990 } 1991 1992 if (si.enable) { 1993 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 1994 xattr_ac, data_ac); 1995 if (status < 0) { 1996 mlog_errno(status); 1997 goto bail; 1998 } 1999 } 2000 2001 /* 2002 * Do this before adding the entry to the directory. We add 2003 * also set d_op after success so that ->d_iput() will cleanup 2004 * the dentry lock even if ocfs2_add_entry() fails below. 2005 */ 2006 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 2007 if (status) { 2008 mlog_errno(status); 2009 goto bail; 2010 } 2011 2012 dl = dentry->d_fsdata; 2013 2014 status = ocfs2_add_entry(handle, dentry, inode, 2015 le64_to_cpu(fe->i_blkno), parent_fe_bh, 2016 &lookup); 2017 if (status < 0) { 2018 mlog_errno(status); 2019 goto bail; 2020 } 2021 2022 insert_inode_hash(inode); 2023 d_instantiate(dentry, inode); 2024 bail: 2025 if (status < 0 && did_quota) 2026 dquot_free_space_nodirty(inode, 2027 ocfs2_clusters_to_bytes(osb->sb, 1)); 2028 if (status < 0 && did_quota_inode) 2029 dquot_free_inode(inode); 2030 if (handle) 2031 ocfs2_commit_trans(osb, handle); 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_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