1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* -*- mode: c; c-basic-offset: 8; -*- 3 * vim: noexpandtab sw=8 ts=8 sts=0: 4 * 5 * namei.c 6 * 7 * Create and rename file, directory, symlinks 8 * 9 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 10 * 11 * Portions of this code from linux/fs/ext3/dir.c 12 * 13 * Copyright (C) 1992, 1993, 1994, 1995 14 * Remy Card (card@masi.ibp.fr) 15 * Laboratoire MASI - Institut Blaise pascal 16 * Universite Pierre et Marie Curie (Paris VI) 17 * 18 * from 19 * 20 * linux/fs/minix/dir.c 21 * 22 * Copyright (C) 1991, 1992 Linux Torvalds 23 */ 24 25 #include <linux/fs.h> 26 #include <linux/types.h> 27 #include <linux/slab.h> 28 #include <linux/highmem.h> 29 #include <linux/quotaops.h> 30 #include <linux/iversion.h> 31 32 #include <cluster/masklog.h> 33 34 #include "ocfs2.h" 35 36 #include "alloc.h" 37 #include "dcache.h" 38 #include "dir.h" 39 #include "dlmglue.h" 40 #include "extent_map.h" 41 #include "file.h" 42 #include "inode.h" 43 #include "journal.h" 44 #include "namei.h" 45 #include "suballoc.h" 46 #include "super.h" 47 #include "symlink.h" 48 #include "sysfile.h" 49 #include "uptodate.h" 50 #include "xattr.h" 51 #include "acl.h" 52 #include "ocfs2_trace.h" 53 54 #include "buffer_head_io.h" 55 56 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 57 struct inode *dir, 58 struct inode *inode, 59 dev_t dev, 60 struct buffer_head **new_fe_bh, 61 struct buffer_head *parent_fe_bh, 62 handle_t *handle, 63 struct ocfs2_alloc_context *inode_ac); 64 65 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 66 struct inode **ret_orphan_dir, 67 u64 blkno, 68 char *name, 69 struct ocfs2_dir_lookup_result *lookup, 70 bool dio); 71 72 static int ocfs2_orphan_add(struct ocfs2_super *osb, 73 handle_t *handle, 74 struct inode *inode, 75 struct buffer_head *fe_bh, 76 char *name, 77 struct ocfs2_dir_lookup_result *lookup, 78 struct inode *orphan_dir_inode, 79 bool dio); 80 81 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 82 handle_t *handle, 83 struct inode *inode, 84 const char *symname); 85 86 static int ocfs2_double_lock(struct ocfs2_super *osb, 87 struct buffer_head **bh1, 88 struct inode *inode1, 89 struct buffer_head **bh2, 90 struct inode *inode2, 91 int rename); 92 93 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2); 94 /* An orphan dir name is an 8 byte value, printed as a hex string */ 95 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64))) 96 97 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, 98 unsigned int flags) 99 { 100 int status; 101 u64 blkno; 102 struct inode *inode = NULL; 103 struct dentry *ret; 104 struct ocfs2_inode_info *oi; 105 106 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len, 107 dentry->d_name.name, 108 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0); 109 110 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { 111 ret = ERR_PTR(-ENAMETOOLONG); 112 goto bail; 113 } 114 115 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT); 116 if (status < 0) { 117 if (status != -ENOENT) 118 mlog_errno(status); 119 ret = ERR_PTR(status); 120 goto bail; 121 } 122 123 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name, 124 dentry->d_name.len, &blkno); 125 if (status < 0) 126 goto bail_add; 127 128 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0); 129 if (IS_ERR(inode)) { 130 ret = ERR_PTR(-EACCES); 131 goto bail_unlock; 132 } 133 134 oi = OCFS2_I(inode); 135 /* Clear any orphaned state... If we were able to look up the 136 * inode from a directory, it certainly can't be orphaned. We 137 * might have the bad state from a node which intended to 138 * orphan this inode but crashed before it could commit the 139 * unlink. */ 140 spin_lock(&oi->ip_lock); 141 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; 142 spin_unlock(&oi->ip_lock); 143 144 bail_add: 145 ret = d_splice_alias(inode, dentry); 146 147 if (inode) { 148 /* 149 * If d_splice_alias() finds a DCACHE_DISCONNECTED 150 * dentry, it will d_move() it on top of ourse. The 151 * return value will indicate this however, so in 152 * those cases, we switch them around for the locking 153 * code. 154 * 155 * NOTE: This dentry already has ->d_op set from 156 * ocfs2_get_parent() and ocfs2_get_dentry() 157 */ 158 if (!IS_ERR_OR_NULL(ret)) 159 dentry = ret; 160 161 status = ocfs2_dentry_attach_lock(dentry, inode, 162 OCFS2_I(dir)->ip_blkno); 163 if (status) { 164 mlog_errno(status); 165 ret = ERR_PTR(status); 166 goto bail_unlock; 167 } 168 } else 169 ocfs2_dentry_attach_gen(dentry); 170 171 bail_unlock: 172 /* Don't drop the cluster lock until *after* the d_add -- 173 * unlink on another node will message us to remove that 174 * dentry under this lock so otherwise we can race this with 175 * the downconvert thread and have a stale dentry. */ 176 ocfs2_inode_unlock(dir, 0); 177 178 bail: 179 180 trace_ocfs2_lookup_ret(ret); 181 182 return ret; 183 } 184 185 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode) 186 { 187 struct inode *inode; 188 int status; 189 190 inode = new_inode(dir->i_sb); 191 if (!inode) { 192 mlog(ML_ERROR, "new_inode failed!\n"); 193 return ERR_PTR(-ENOMEM); 194 } 195 196 /* populate as many fields early on as possible - many of 197 * these are used by the support functions here and in 198 * callers. */ 199 if (S_ISDIR(mode)) 200 set_nlink(inode, 2); 201 inode_init_owner(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 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 inode *dir, 649 struct dentry *dentry, 650 umode_t mode) 651 { 652 int ret; 653 654 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, 655 OCFS2_I(dir)->ip_blkno, mode); 656 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); 657 if (ret) 658 mlog_errno(ret); 659 660 return ret; 661 } 662 663 static int ocfs2_create(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(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(ML_NOTICE, "max lookup times reached, filesystem " 1092 "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 inode *old_dir, 1199 struct dentry *old_dentry, 1200 struct inode *new_dir, 1201 struct dentry *new_dentry, 1202 unsigned int flags) 1203 { 1204 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1205 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1206 struct inode *old_inode = d_inode(old_dentry); 1207 struct inode *new_inode = d_inode(new_dentry); 1208 struct inode *orphan_dir = NULL; 1209 struct ocfs2_dinode *newfe = NULL; 1210 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1211 struct buffer_head *newfe_bh = NULL; 1212 struct buffer_head *old_inode_bh = NULL; 1213 struct ocfs2_super *osb = NULL; 1214 u64 newfe_blkno, old_de_ino; 1215 handle_t *handle = NULL; 1216 struct buffer_head *old_dir_bh = NULL; 1217 struct buffer_head *new_dir_bh = NULL; 1218 u32 old_dir_nlink = old_dir->i_nlink; 1219 struct ocfs2_dinode *old_di; 1220 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1221 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1222 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1223 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1224 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1225 bool should_add_orphan = false; 1226 1227 if (flags) 1228 return -EINVAL; 1229 1230 /* At some point it might be nice to break this function up a 1231 * bit. */ 1232 1233 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, 1234 old_dentry->d_name.len, old_dentry->d_name.name, 1235 new_dentry->d_name.len, new_dentry->d_name.name); 1236 1237 status = dquot_initialize(old_dir); 1238 if (status) { 1239 mlog_errno(status); 1240 goto bail; 1241 } 1242 status = dquot_initialize(new_dir); 1243 if (status) { 1244 mlog_errno(status); 1245 goto bail; 1246 } 1247 1248 osb = OCFS2_SB(old_dir->i_sb); 1249 1250 if (new_inode) { 1251 if (!igrab(new_inode)) 1252 BUG(); 1253 } 1254 1255 /* Assume a directory hierarchy thusly: 1256 * a/b/c 1257 * a/d 1258 * a,b,c, and d are all directories. 1259 * 1260 * from cwd of 'a' on both nodes: 1261 * node1: mv b/c d 1262 * node2: mv d b/c 1263 * 1264 * And that's why, just like the VFS, we need a file system 1265 * rename lock. */ 1266 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1267 status = ocfs2_rename_lock(osb); 1268 if (status < 0) { 1269 mlog_errno(status); 1270 goto bail; 1271 } 1272 rename_lock = 1; 1273 1274 /* here we cannot guarantee the inodes haven't just been 1275 * changed, so check if they are nested again */ 1276 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, 1277 old_inode->i_ino); 1278 if (status < 0) { 1279 mlog_errno(status); 1280 goto bail; 1281 } else if (status == 1) { 1282 status = -EPERM; 1283 trace_ocfs2_rename_not_permitted( 1284 (unsigned long long)old_inode->i_ino, 1285 (unsigned long long)new_dir->i_ino); 1286 goto bail; 1287 } 1288 } 1289 1290 /* if old and new are the same, this'll just do one lock. */ 1291 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1292 &new_dir_bh, new_dir, 1); 1293 if (status < 0) { 1294 mlog_errno(status); 1295 goto bail; 1296 } 1297 parents_locked = 1; 1298 1299 if (!new_dir->i_nlink) { 1300 status = -EACCES; 1301 goto bail; 1302 } 1303 1304 /* make sure both dirs have bhs 1305 * get an extra ref on old_dir_bh if old==new */ 1306 if (!new_dir_bh) { 1307 if (old_dir_bh) { 1308 new_dir_bh = old_dir_bh; 1309 get_bh(new_dir_bh); 1310 } else { 1311 mlog(ML_ERROR, "no old_dir_bh!\n"); 1312 status = -EIO; 1313 goto bail; 1314 } 1315 } 1316 1317 /* 1318 * Aside from allowing a meta data update, the locking here 1319 * also ensures that the downconvert thread on other nodes 1320 * won't have to concurrently downconvert the inode and the 1321 * dentry locks. 1322 */ 1323 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1324 OI_LS_PARENT); 1325 if (status < 0) { 1326 if (status != -ENOENT) 1327 mlog_errno(status); 1328 goto bail; 1329 } 1330 old_child_locked = 1; 1331 1332 status = ocfs2_remote_dentry_delete(old_dentry); 1333 if (status < 0) { 1334 mlog_errno(status); 1335 goto bail; 1336 } 1337 1338 if (S_ISDIR(old_inode->i_mode)) { 1339 u64 old_inode_parent; 1340 1341 update_dot_dot = 1; 1342 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1343 old_inode, 1344 &old_inode_dot_dot_res); 1345 if (status) { 1346 status = -EIO; 1347 goto bail; 1348 } 1349 1350 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1351 status = -EIO; 1352 goto bail; 1353 } 1354 1355 if (!new_inode && new_dir != old_dir && 1356 new_dir->i_nlink >= ocfs2_link_max(osb)) { 1357 status = -EMLINK; 1358 goto bail; 1359 } 1360 } 1361 1362 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1363 old_dentry->d_name.len, 1364 &old_de_ino); 1365 if (status) { 1366 status = -ENOENT; 1367 goto bail; 1368 } 1369 1370 /* 1371 * Check for inode number is _not_ due to possible IO errors. 1372 * We might rmdir the source, keep it as pwd of some process 1373 * and merrily kill the link to whatever was created under the 1374 * same name. Goodbye sticky bit ;-< 1375 */ 1376 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1377 status = -ENOENT; 1378 goto bail; 1379 } 1380 1381 /* check if the target already exists (in which case we need 1382 * to delete it */ 1383 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1384 new_dentry->d_name.len, 1385 &newfe_blkno, new_dir, 1386 &target_lookup_res); 1387 /* The only error we allow here is -ENOENT because the new 1388 * file not existing is perfectly valid. */ 1389 if ((status < 0) && (status != -ENOENT)) { 1390 /* If we cannot find the file specified we should just */ 1391 /* return the error... */ 1392 mlog_errno(status); 1393 goto bail; 1394 } 1395 if (status == 0) 1396 target_exists = 1; 1397 1398 if (!target_exists && new_inode) { 1399 /* 1400 * Target was unlinked by another node while we were 1401 * waiting to get to ocfs2_rename(). There isn't 1402 * anything we can do here to help the situation, so 1403 * bubble up the appropriate error. 1404 */ 1405 status = -ENOENT; 1406 goto bail; 1407 } 1408 1409 /* In case we need to overwrite an existing file, we blow it 1410 * away first */ 1411 if (target_exists) { 1412 /* VFS didn't think there existed an inode here, but 1413 * someone else in the cluster must have raced our 1414 * rename to create one. Today we error cleanly, in 1415 * the future we should consider calling iget to build 1416 * a new struct inode for this entry. */ 1417 if (!new_inode) { 1418 status = -EACCES; 1419 1420 trace_ocfs2_rename_target_exists(new_dentry->d_name.len, 1421 new_dentry->d_name.name); 1422 goto bail; 1423 } 1424 1425 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1426 status = -EACCES; 1427 1428 trace_ocfs2_rename_disagree( 1429 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1430 (unsigned long long)newfe_blkno, 1431 OCFS2_I(new_inode)->ip_flags); 1432 goto bail; 1433 } 1434 1435 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1436 if (status < 0) { 1437 if (status != -ENOENT) 1438 mlog_errno(status); 1439 goto bail; 1440 } 1441 new_child_locked = 1; 1442 1443 status = ocfs2_remote_dentry_delete(new_dentry); 1444 if (status < 0) { 1445 mlog_errno(status); 1446 goto bail; 1447 } 1448 1449 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1450 1451 trace_ocfs2_rename_over_existing( 1452 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1453 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1454 1455 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1456 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1457 OCFS2_I(new_inode)->ip_blkno, 1458 orphan_name, &orphan_insert, 1459 false); 1460 if (status < 0) { 1461 mlog_errno(status); 1462 goto bail; 1463 } 1464 should_add_orphan = true; 1465 } 1466 } else { 1467 BUG_ON(d_inode(new_dentry->d_parent) != new_dir); 1468 1469 status = ocfs2_check_dir_for_entry(new_dir, 1470 new_dentry->d_name.name, 1471 new_dentry->d_name.len); 1472 if (status) 1473 goto bail; 1474 1475 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1476 new_dentry->d_name.name, 1477 new_dentry->d_name.len, 1478 &target_insert); 1479 if (status < 0) { 1480 mlog_errno(status); 1481 goto bail; 1482 } 1483 } 1484 1485 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1486 if (IS_ERR(handle)) { 1487 status = PTR_ERR(handle); 1488 handle = NULL; 1489 mlog_errno(status); 1490 goto bail; 1491 } 1492 1493 if (target_exists) { 1494 if (S_ISDIR(new_inode->i_mode)) { 1495 if (new_inode->i_nlink != 2 || 1496 !ocfs2_empty_dir(new_inode)) { 1497 status = -ENOTEMPTY; 1498 goto bail; 1499 } 1500 } 1501 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1502 newfe_bh, 1503 OCFS2_JOURNAL_ACCESS_WRITE); 1504 if (status < 0) { 1505 mlog_errno(status); 1506 goto bail; 1507 } 1508 1509 /* change the dirent to point to the correct inode */ 1510 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1511 old_inode); 1512 if (status < 0) { 1513 mlog_errno(status); 1514 goto bail; 1515 } 1516 inode_inc_iversion(new_dir); 1517 1518 if (S_ISDIR(new_inode->i_mode)) 1519 ocfs2_set_links_count(newfe, 0); 1520 else 1521 ocfs2_add_links_count(newfe, -1); 1522 ocfs2_journal_dirty(handle, newfe_bh); 1523 if (should_add_orphan) { 1524 status = ocfs2_orphan_add(osb, handle, new_inode, 1525 newfe_bh, orphan_name, 1526 &orphan_insert, orphan_dir, false); 1527 if (status < 0) { 1528 mlog_errno(status); 1529 goto bail; 1530 } 1531 } 1532 } else { 1533 /* if the name was not found in new_dir, add it now */ 1534 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1535 OCFS2_I(old_inode)->ip_blkno, 1536 new_dir_bh, &target_insert); 1537 } 1538 1539 old_inode->i_ctime = current_time(old_inode); 1540 mark_inode_dirty(old_inode); 1541 1542 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1543 old_inode_bh, 1544 OCFS2_JOURNAL_ACCESS_WRITE); 1545 if (status >= 0) { 1546 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1547 1548 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); 1549 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); 1550 ocfs2_journal_dirty(handle, old_inode_bh); 1551 } else 1552 mlog_errno(status); 1553 1554 /* 1555 * Now that the name has been added to new_dir, remove the old name. 1556 * 1557 * We don't keep any directory entry context around until now 1558 * because the insert might have changed the type of directory 1559 * we're dealing with. 1560 */ 1561 status = ocfs2_find_entry(old_dentry->d_name.name, 1562 old_dentry->d_name.len, old_dir, 1563 &old_entry_lookup); 1564 if (status) { 1565 if (!is_journal_aborted(osb->journal->j_journal)) { 1566 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1567 "is not deleted.", 1568 new_dentry->d_name.len, new_dentry->d_name.name, 1569 old_dentry->d_name.len, old_dentry->d_name.name); 1570 } 1571 goto bail; 1572 } 1573 1574 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1575 if (status < 0) { 1576 mlog_errno(status); 1577 if (!is_journal_aborted(osb->journal->j_journal)) { 1578 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1579 "is not deleted.", 1580 new_dentry->d_name.len, new_dentry->d_name.name, 1581 old_dentry->d_name.len, old_dentry->d_name.name); 1582 } 1583 goto bail; 1584 } 1585 1586 if (new_inode) { 1587 drop_nlink(new_inode); 1588 new_inode->i_ctime = current_time(new_inode); 1589 } 1590 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir); 1591 1592 if (update_dot_dot) { 1593 status = ocfs2_update_entry(old_inode, handle, 1594 &old_inode_dot_dot_res, new_dir); 1595 drop_nlink(old_dir); 1596 if (new_inode) { 1597 drop_nlink(new_inode); 1598 } else { 1599 inc_nlink(new_dir); 1600 mark_inode_dirty(new_dir); 1601 } 1602 } 1603 mark_inode_dirty(old_dir); 1604 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1605 if (new_inode) { 1606 mark_inode_dirty(new_inode); 1607 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1608 } 1609 1610 if (old_dir != new_dir) { 1611 /* Keep the same times on both directories.*/ 1612 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; 1613 1614 /* 1615 * This will also pick up the i_nlink change from the 1616 * block above. 1617 */ 1618 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1619 } 1620 1621 if (old_dir_nlink != old_dir->i_nlink) { 1622 if (!old_dir_bh) { 1623 mlog(ML_ERROR, "need to change nlink for old dir " 1624 "%llu from %d to %d but bh is NULL!\n", 1625 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1626 (int)old_dir_nlink, old_dir->i_nlink); 1627 } else { 1628 struct ocfs2_dinode *fe; 1629 status = ocfs2_journal_access_di(handle, 1630 INODE_CACHE(old_dir), 1631 old_dir_bh, 1632 OCFS2_JOURNAL_ACCESS_WRITE); 1633 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1634 ocfs2_set_links_count(fe, old_dir->i_nlink); 1635 ocfs2_journal_dirty(handle, old_dir_bh); 1636 } 1637 } 1638 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1639 status = 0; 1640 bail: 1641 if (handle) 1642 ocfs2_commit_trans(osb, handle); 1643 1644 if (orphan_dir) { 1645 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1646 ocfs2_inode_unlock(orphan_dir, 1); 1647 inode_unlock(orphan_dir); 1648 iput(orphan_dir); 1649 } 1650 1651 if (new_child_locked) 1652 ocfs2_inode_unlock(new_inode, 1); 1653 1654 if (old_child_locked) 1655 ocfs2_inode_unlock(old_inode, 1); 1656 1657 if (parents_locked) 1658 ocfs2_double_unlock(old_dir, new_dir); 1659 1660 if (rename_lock) 1661 ocfs2_rename_unlock(osb); 1662 1663 if (new_inode) 1664 sync_mapping_buffers(old_inode->i_mapping); 1665 1666 iput(new_inode); 1667 1668 ocfs2_free_dir_lookup_result(&target_lookup_res); 1669 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1670 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1671 ocfs2_free_dir_lookup_result(&orphan_insert); 1672 ocfs2_free_dir_lookup_result(&target_insert); 1673 1674 brelse(newfe_bh); 1675 brelse(old_inode_bh); 1676 brelse(old_dir_bh); 1677 brelse(new_dir_bh); 1678 1679 if (status) 1680 mlog_errno(status); 1681 1682 return status; 1683 } 1684 1685 /* 1686 * we expect i_size = strlen(symname). Copy symname into the file 1687 * data, including the null terminator. 1688 */ 1689 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1690 handle_t *handle, 1691 struct inode *inode, 1692 const char *symname) 1693 { 1694 struct buffer_head **bhs = NULL; 1695 const char *c; 1696 struct super_block *sb = osb->sb; 1697 u64 p_blkno, p_blocks; 1698 int virtual, blocks, status, i, bytes_left; 1699 1700 bytes_left = i_size_read(inode) + 1; 1701 /* we can't trust i_blocks because we're actually going to 1702 * write i_size + 1 bytes. */ 1703 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1704 1705 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, 1706 i_size_read(inode), blocks); 1707 1708 /* Sanity check -- make sure we're going to fit. */ 1709 if (bytes_left > 1710 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1711 status = -EIO; 1712 mlog_errno(status); 1713 goto bail; 1714 } 1715 1716 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1717 if (!bhs) { 1718 status = -ENOMEM; 1719 mlog_errno(status); 1720 goto bail; 1721 } 1722 1723 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1724 NULL); 1725 if (status < 0) { 1726 mlog_errno(status); 1727 goto bail; 1728 } 1729 1730 /* links can never be larger than one cluster so we know this 1731 * is all going to be contiguous, but do a sanity check 1732 * anyway. */ 1733 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1734 status = -EIO; 1735 mlog_errno(status); 1736 goto bail; 1737 } 1738 1739 virtual = 0; 1740 while(bytes_left > 0) { 1741 c = &symname[virtual * sb->s_blocksize]; 1742 1743 bhs[virtual] = sb_getblk(sb, p_blkno); 1744 if (!bhs[virtual]) { 1745 status = -ENOMEM; 1746 mlog_errno(status); 1747 goto bail; 1748 } 1749 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1750 bhs[virtual]); 1751 1752 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1753 bhs[virtual], 1754 OCFS2_JOURNAL_ACCESS_CREATE); 1755 if (status < 0) { 1756 mlog_errno(status); 1757 goto bail; 1758 } 1759 1760 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1761 1762 memcpy(bhs[virtual]->b_data, c, 1763 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1764 bytes_left); 1765 1766 ocfs2_journal_dirty(handle, bhs[virtual]); 1767 1768 virtual++; 1769 p_blkno++; 1770 bytes_left -= sb->s_blocksize; 1771 } 1772 1773 status = 0; 1774 bail: 1775 1776 if (bhs) { 1777 for(i = 0; i < blocks; i++) 1778 brelse(bhs[i]); 1779 kfree(bhs); 1780 } 1781 1782 if (status) 1783 mlog_errno(status); 1784 return status; 1785 } 1786 1787 static int ocfs2_symlink(struct inode *dir, 1788 struct dentry *dentry, 1789 const char *symname) 1790 { 1791 int status, l, credits; 1792 u64 newsize; 1793 struct ocfs2_super *osb = NULL; 1794 struct inode *inode = NULL; 1795 struct super_block *sb; 1796 struct buffer_head *new_fe_bh = NULL; 1797 struct buffer_head *parent_fe_bh = NULL; 1798 struct ocfs2_dinode *fe = NULL; 1799 struct ocfs2_dinode *dirfe; 1800 handle_t *handle = NULL; 1801 struct ocfs2_alloc_context *inode_ac = NULL; 1802 struct ocfs2_alloc_context *data_ac = NULL; 1803 struct ocfs2_alloc_context *xattr_ac = NULL; 1804 int want_clusters = 0; 1805 int xattr_credits = 0; 1806 struct ocfs2_security_xattr_info si = { 1807 .enable = 1, 1808 }; 1809 int did_quota = 0, did_quota_inode = 0; 1810 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1811 sigset_t oldset; 1812 int did_block_signals = 0; 1813 struct ocfs2_dentry_lock *dl = NULL; 1814 1815 trace_ocfs2_symlink_begin(dir, dentry, symname, 1816 dentry->d_name.len, dentry->d_name.name); 1817 1818 status = dquot_initialize(dir); 1819 if (status) { 1820 mlog_errno(status); 1821 goto bail; 1822 } 1823 1824 sb = dir->i_sb; 1825 osb = OCFS2_SB(sb); 1826 1827 l = strlen(symname) + 1; 1828 1829 credits = ocfs2_calc_symlink_credits(sb); 1830 1831 /* lock the parent directory */ 1832 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1833 if (status < 0) { 1834 if (status != -ENOENT) 1835 mlog_errno(status); 1836 return status; 1837 } 1838 1839 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1840 if (!ocfs2_read_links_count(dirfe)) { 1841 /* can't make a file in a deleted directory. */ 1842 status = -ENOENT; 1843 goto bail; 1844 } 1845 1846 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1847 dentry->d_name.len); 1848 if (status) 1849 goto bail; 1850 1851 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1852 dentry->d_name.name, 1853 dentry->d_name.len, &lookup); 1854 if (status < 0) { 1855 mlog_errno(status); 1856 goto bail; 1857 } 1858 1859 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1860 if (status < 0) { 1861 if (status != -ENOSPC) 1862 mlog_errno(status); 1863 goto bail; 1864 } 1865 1866 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1867 if (IS_ERR(inode)) { 1868 status = PTR_ERR(inode); 1869 inode = NULL; 1870 mlog_errno(status); 1871 goto bail; 1872 } 1873 1874 /* get security xattr */ 1875 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1876 if (status) { 1877 if (status == -EOPNOTSUPP) 1878 si.enable = 0; 1879 else { 1880 mlog_errno(status); 1881 goto bail; 1882 } 1883 } 1884 1885 /* calculate meta data/clusters for setting security xattr */ 1886 if (si.enable) { 1887 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1888 &xattr_credits, &xattr_ac); 1889 if (status < 0) { 1890 mlog_errno(status); 1891 goto bail; 1892 } 1893 } 1894 1895 /* don't reserve bitmap space for fast symlinks. */ 1896 if (l > ocfs2_fast_symlink_chars(sb)) 1897 want_clusters += 1; 1898 1899 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1900 if (status < 0) { 1901 if (status != -ENOSPC) 1902 mlog_errno(status); 1903 goto bail; 1904 } 1905 1906 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1907 if (IS_ERR(handle)) { 1908 status = PTR_ERR(handle); 1909 handle = NULL; 1910 mlog_errno(status); 1911 goto bail; 1912 } 1913 1914 /* Starting to change things, restart is no longer possible. */ 1915 ocfs2_block_signals(&oldset); 1916 did_block_signals = 1; 1917 1918 status = dquot_alloc_inode(inode); 1919 if (status) 1920 goto bail; 1921 did_quota_inode = 1; 1922 1923 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1924 dentry->d_name.name, 1925 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1926 inode->i_mode); 1927 1928 status = ocfs2_mknod_locked(osb, dir, inode, 1929 0, &new_fe_bh, parent_fe_bh, handle, 1930 inode_ac); 1931 if (status < 0) { 1932 mlog_errno(status); 1933 goto bail; 1934 } 1935 1936 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1937 inode->i_rdev = 0; 1938 newsize = l - 1; 1939 inode->i_op = &ocfs2_symlink_inode_operations; 1940 inode_nohighmem(inode); 1941 if (l > ocfs2_fast_symlink_chars(sb)) { 1942 u32 offset = 0; 1943 1944 status = dquot_alloc_space_nodirty(inode, 1945 ocfs2_clusters_to_bytes(osb->sb, 1)); 1946 if (status) 1947 goto bail; 1948 did_quota = 1; 1949 inode->i_mapping->a_ops = &ocfs2_aops; 1950 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1951 new_fe_bh, 1952 handle, data_ac, NULL, 1953 NULL); 1954 if (status < 0) { 1955 if (status != -ENOSPC && status != -EINTR) { 1956 mlog(ML_ERROR, 1957 "Failed to extend file to %llu\n", 1958 (unsigned long long)newsize); 1959 mlog_errno(status); 1960 status = -ENOSPC; 1961 } 1962 goto bail; 1963 } 1964 i_size_write(inode, newsize); 1965 inode->i_blocks = ocfs2_inode_sector_count(inode); 1966 } else { 1967 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1968 memcpy((char *) fe->id2.i_symlink, symname, l); 1969 i_size_write(inode, newsize); 1970 inode->i_blocks = 0; 1971 } 1972 1973 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1974 if (status < 0) { 1975 mlog_errno(status); 1976 goto bail; 1977 } 1978 1979 if (!ocfs2_inode_is_fast_symlink(inode)) { 1980 status = ocfs2_create_symlink_data(osb, handle, inode, 1981 symname); 1982 if (status < 0) { 1983 mlog_errno(status); 1984 goto bail; 1985 } 1986 } 1987 1988 if (si.enable) { 1989 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 1990 xattr_ac, data_ac); 1991 if (status < 0) { 1992 mlog_errno(status); 1993 goto bail; 1994 } 1995 } 1996 1997 /* 1998 * Do this before adding the entry to the directory. We add 1999 * also set d_op after success so that ->d_iput() will cleanup 2000 * the dentry lock even if ocfs2_add_entry() fails below. 2001 */ 2002 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 2003 if (status) { 2004 mlog_errno(status); 2005 goto bail; 2006 } 2007 2008 dl = dentry->d_fsdata; 2009 2010 status = ocfs2_add_entry(handle, dentry, inode, 2011 le64_to_cpu(fe->i_blkno), parent_fe_bh, 2012 &lookup); 2013 if (status < 0) { 2014 mlog_errno(status); 2015 goto bail; 2016 } 2017 2018 insert_inode_hash(inode); 2019 d_instantiate(dentry, inode); 2020 bail: 2021 if (status < 0 && did_quota) 2022 dquot_free_space_nodirty(inode, 2023 ocfs2_clusters_to_bytes(osb->sb, 1)); 2024 if (status < 0 && did_quota_inode) 2025 dquot_free_inode(inode); 2026 if (handle) 2027 ocfs2_commit_trans(osb, handle); 2028 2029 ocfs2_inode_unlock(dir, 1); 2030 if (did_block_signals) 2031 ocfs2_unblock_signals(&oldset); 2032 2033 brelse(new_fe_bh); 2034 brelse(parent_fe_bh); 2035 kfree(si.value); 2036 ocfs2_free_dir_lookup_result(&lookup); 2037 if (inode_ac) 2038 ocfs2_free_alloc_context(inode_ac); 2039 if (data_ac) 2040 ocfs2_free_alloc_context(data_ac); 2041 if (xattr_ac) 2042 ocfs2_free_alloc_context(xattr_ac); 2043 if ((status < 0) && inode) { 2044 if (dl) 2045 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 2046 2047 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 2048 clear_nlink(inode); 2049 iput(inode); 2050 } 2051 2052 if (status) 2053 mlog_errno(status); 2054 2055 return status; 2056 } 2057 2058 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2059 { 2060 int status, namelen; 2061 2062 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2063 (long long)blkno); 2064 if (namelen <= 0) { 2065 if (namelen) 2066 status = namelen; 2067 else 2068 status = -EINVAL; 2069 mlog_errno(status); 2070 goto bail; 2071 } 2072 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2073 status = -EINVAL; 2074 mlog_errno(status); 2075 goto bail; 2076 } 2077 2078 trace_ocfs2_blkno_stringify(blkno, name, namelen); 2079 2080 status = 0; 2081 bail: 2082 if (status < 0) 2083 mlog_errno(status); 2084 return status; 2085 } 2086 2087 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, 2088 struct inode **ret_orphan_dir, 2089 struct buffer_head **ret_orphan_dir_bh) 2090 { 2091 struct inode *orphan_dir_inode; 2092 struct buffer_head *orphan_dir_bh = NULL; 2093 int ret = 0; 2094 2095 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2096 ORPHAN_DIR_SYSTEM_INODE, 2097 osb->slot_num); 2098 if (!orphan_dir_inode) { 2099 ret = -ENOENT; 2100 mlog_errno(ret); 2101 return ret; 2102 } 2103 2104 inode_lock(orphan_dir_inode); 2105 2106 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2107 if (ret < 0) { 2108 inode_unlock(orphan_dir_inode); 2109 iput(orphan_dir_inode); 2110 2111 mlog_errno(ret); 2112 return ret; 2113 } 2114 2115 *ret_orphan_dir = orphan_dir_inode; 2116 *ret_orphan_dir_bh = orphan_dir_bh; 2117 2118 return 0; 2119 } 2120 2121 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, 2122 struct buffer_head *orphan_dir_bh, 2123 u64 blkno, 2124 char *name, 2125 struct ocfs2_dir_lookup_result *lookup, 2126 bool dio) 2127 { 2128 int ret; 2129 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); 2130 int namelen = dio ? 2131 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2132 OCFS2_ORPHAN_NAMELEN; 2133 2134 if (dio) { 2135 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2136 OCFS2_DIO_ORPHAN_PREFIX); 2137 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2138 ret = -EINVAL; 2139 mlog_errno(ret); 2140 return ret; 2141 } 2142 2143 ret = ocfs2_blkno_stringify(blkno, 2144 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2145 } else 2146 ret = ocfs2_blkno_stringify(blkno, name); 2147 if (ret < 0) { 2148 mlog_errno(ret); 2149 return ret; 2150 } 2151 2152 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2153 orphan_dir_bh, name, 2154 namelen, lookup); 2155 if (ret < 0) { 2156 mlog_errno(ret); 2157 return ret; 2158 } 2159 2160 return 0; 2161 } 2162 2163 /** 2164 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for 2165 * insertion of an orphan. 2166 * @osb: ocfs2 file system 2167 * @ret_orphan_dir: Orphan dir inode - returned locked! 2168 * @blkno: Actual block number of the inode to be inserted into orphan dir. 2169 * @lookup: dir lookup result, to be passed back into functions like 2170 * ocfs2_orphan_add 2171 * 2172 * Returns zero on success and the ret_orphan_dir, name and lookup 2173 * fields will be populated. 2174 * 2175 * Returns non-zero on failure. 2176 */ 2177 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2178 struct inode **ret_orphan_dir, 2179 u64 blkno, 2180 char *name, 2181 struct ocfs2_dir_lookup_result *lookup, 2182 bool dio) 2183 { 2184 struct inode *orphan_dir_inode = NULL; 2185 struct buffer_head *orphan_dir_bh = NULL; 2186 int ret = 0; 2187 2188 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, 2189 &orphan_dir_bh); 2190 if (ret < 0) { 2191 mlog_errno(ret); 2192 return ret; 2193 } 2194 2195 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, 2196 blkno, name, lookup, dio); 2197 if (ret < 0) { 2198 mlog_errno(ret); 2199 goto out; 2200 } 2201 2202 *ret_orphan_dir = orphan_dir_inode; 2203 2204 out: 2205 brelse(orphan_dir_bh); 2206 2207 if (ret) { 2208 ocfs2_inode_unlock(orphan_dir_inode, 1); 2209 inode_unlock(orphan_dir_inode); 2210 iput(orphan_dir_inode); 2211 } 2212 2213 if (ret) 2214 mlog_errno(ret); 2215 return ret; 2216 } 2217 2218 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2219 handle_t *handle, 2220 struct inode *inode, 2221 struct buffer_head *fe_bh, 2222 char *name, 2223 struct ocfs2_dir_lookup_result *lookup, 2224 struct inode *orphan_dir_inode, 2225 bool dio) 2226 { 2227 struct buffer_head *orphan_dir_bh = NULL; 2228 int status = 0; 2229 struct ocfs2_dinode *orphan_fe; 2230 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 2231 int namelen = dio ? 2232 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2233 OCFS2_ORPHAN_NAMELEN; 2234 2235 trace_ocfs2_orphan_add_begin( 2236 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2237 2238 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 2239 if (status < 0) { 2240 mlog_errno(status); 2241 goto leave; 2242 } 2243 2244 status = ocfs2_journal_access_di(handle, 2245 INODE_CACHE(orphan_dir_inode), 2246 orphan_dir_bh, 2247 OCFS2_JOURNAL_ACCESS_WRITE); 2248 if (status < 0) { 2249 mlog_errno(status); 2250 goto leave; 2251 } 2252 2253 /* 2254 * We're going to journal the change of i_flags and i_orphaned_slot. 2255 * It's safe anyway, though some callers may duplicate the journaling. 2256 * Journaling within the func just make the logic look more 2257 * straightforward. 2258 */ 2259 status = ocfs2_journal_access_di(handle, 2260 INODE_CACHE(inode), 2261 fe_bh, 2262 OCFS2_JOURNAL_ACCESS_WRITE); 2263 if (status < 0) { 2264 mlog_errno(status); 2265 goto leave; 2266 } 2267 2268 /* we're a cluster, and nlink can change on disk from 2269 * underneath us... */ 2270 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2271 if (S_ISDIR(inode->i_mode)) 2272 ocfs2_add_links_count(orphan_fe, 1); 2273 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2274 ocfs2_journal_dirty(handle, orphan_dir_bh); 2275 2276 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2277 namelen, inode, 2278 OCFS2_I(inode)->ip_blkno, 2279 orphan_dir_bh, lookup); 2280 if (status < 0) { 2281 mlog_errno(status); 2282 goto rollback; 2283 } 2284 2285 if (dio) { 2286 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan 2287 * slot. 2288 */ 2289 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2290 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); 2291 } else { 2292 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL); 2293 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; 2294 2295 /* Record which orphan dir our inode now resides 2296 * in. delete_inode will use this to determine which orphan 2297 * dir to lock. */ 2298 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2299 } 2300 2301 ocfs2_journal_dirty(handle, fe_bh); 2302 2303 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, 2304 osb->slot_num); 2305 2306 rollback: 2307 if (status < 0) { 2308 if (S_ISDIR(inode->i_mode)) 2309 ocfs2_add_links_count(orphan_fe, -1); 2310 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2311 } 2312 2313 leave: 2314 brelse(orphan_dir_bh); 2315 2316 return status; 2317 } 2318 2319 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2320 int ocfs2_orphan_del(struct ocfs2_super *osb, 2321 handle_t *handle, 2322 struct inode *orphan_dir_inode, 2323 struct inode *inode, 2324 struct buffer_head *orphan_dir_bh, 2325 bool dio) 2326 { 2327 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2328 struct ocfs2_dinode *orphan_fe; 2329 int status = 0; 2330 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2331 2332 if (dio) { 2333 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2334 OCFS2_DIO_ORPHAN_PREFIX); 2335 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2336 status = -EINVAL; 2337 mlog_errno(status); 2338 return status; 2339 } 2340 2341 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, 2342 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2343 } else 2344 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2345 if (status < 0) { 2346 mlog_errno(status); 2347 goto leave; 2348 } 2349 2350 trace_ocfs2_orphan_del( 2351 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2352 name, strlen(name)); 2353 2354 status = ocfs2_journal_access_di(handle, 2355 INODE_CACHE(orphan_dir_inode), 2356 orphan_dir_bh, 2357 OCFS2_JOURNAL_ACCESS_WRITE); 2358 if (status < 0) { 2359 mlog_errno(status); 2360 goto leave; 2361 } 2362 2363 /* find it's spot in the orphan directory */ 2364 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode, 2365 &lookup); 2366 if (status) { 2367 mlog_errno(status); 2368 goto leave; 2369 } 2370 2371 /* remove it from the orphan directory */ 2372 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); 2373 if (status < 0) { 2374 mlog_errno(status); 2375 goto leave; 2376 } 2377 2378 /* do the i_nlink dance! :) */ 2379 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2380 if (S_ISDIR(inode->i_mode)) 2381 ocfs2_add_links_count(orphan_fe, -1); 2382 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2383 ocfs2_journal_dirty(handle, orphan_dir_bh); 2384 2385 leave: 2386 ocfs2_free_dir_lookup_result(&lookup); 2387 2388 if (status) 2389 mlog_errno(status); 2390 return status; 2391 } 2392 2393 /** 2394 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly 2395 * allocated file. This is different from the typical 'add to orphan dir' 2396 * operation in that the inode does not yet exist. This is a problem because 2397 * the orphan dir stringifies the inode block number to come up with it's 2398 * dirent. Obviously if the inode does not yet exist we have a chicken and egg 2399 * problem. This function works around it by calling deeper into the orphan 2400 * and suballoc code than other callers. Use this only by necessity. 2401 * @dir: The directory which this inode will ultimately wind up under - not the 2402 * orphan dir! 2403 * @dir_bh: buffer_head the @dir inode block 2404 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled 2405 * with the string to be used for orphan dirent. Pass back to the orphan dir 2406 * code. 2407 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan 2408 * dir code. 2409 * @ret_di_blkno: block number where the new inode will be allocated. 2410 * @orphan_insert: Dir insert context to be passed back into orphan dir code. 2411 * @ret_inode_ac: Inode alloc context to be passed back to the allocator. 2412 * 2413 * Returns zero on success and the ret_orphan_dir, name and lookup 2414 * fields will be populated. 2415 * 2416 * Returns non-zero on failure. 2417 */ 2418 static int ocfs2_prep_new_orphaned_file(struct inode *dir, 2419 struct buffer_head *dir_bh, 2420 char *orphan_name, 2421 struct inode **ret_orphan_dir, 2422 u64 *ret_di_blkno, 2423 struct ocfs2_dir_lookup_result *orphan_insert, 2424 struct ocfs2_alloc_context **ret_inode_ac) 2425 { 2426 int ret; 2427 u64 di_blkno; 2428 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2429 struct inode *orphan_dir = NULL; 2430 struct buffer_head *orphan_dir_bh = NULL; 2431 struct ocfs2_alloc_context *inode_ac = NULL; 2432 2433 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); 2434 if (ret < 0) { 2435 mlog_errno(ret); 2436 return ret; 2437 } 2438 2439 /* reserve an inode spot */ 2440 ret = ocfs2_reserve_new_inode(osb, &inode_ac); 2441 if (ret < 0) { 2442 if (ret != -ENOSPC) 2443 mlog_errno(ret); 2444 goto out; 2445 } 2446 2447 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, 2448 &di_blkno); 2449 if (ret) { 2450 mlog_errno(ret); 2451 goto out; 2452 } 2453 2454 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, 2455 di_blkno, orphan_name, orphan_insert, 2456 false); 2457 if (ret < 0) { 2458 mlog_errno(ret); 2459 goto out; 2460 } 2461 2462 out: 2463 if (ret == 0) { 2464 *ret_orphan_dir = orphan_dir; 2465 *ret_di_blkno = di_blkno; 2466 *ret_inode_ac = inode_ac; 2467 /* 2468 * orphan_name and orphan_insert are already up to 2469 * date via prepare_orphan_dir 2470 */ 2471 } else { 2472 /* Unroll reserve_new_inode* */ 2473 if (inode_ac) 2474 ocfs2_free_alloc_context(inode_ac); 2475 2476 /* Unroll orphan dir locking */ 2477 inode_unlock(orphan_dir); 2478 ocfs2_inode_unlock(orphan_dir, 1); 2479 iput(orphan_dir); 2480 } 2481 2482 brelse(orphan_dir_bh); 2483 2484 return ret; 2485 } 2486 2487 int ocfs2_create_inode_in_orphan(struct inode *dir, 2488 int mode, 2489 struct inode **new_inode) 2490 { 2491 int status, did_quota_inode = 0; 2492 struct inode *inode = NULL; 2493 struct inode *orphan_dir = NULL; 2494 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2495 handle_t *handle = NULL; 2496 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2497 struct buffer_head *parent_di_bh = NULL; 2498 struct buffer_head *new_di_bh = NULL; 2499 struct ocfs2_alloc_context *inode_ac = NULL; 2500 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2501 u64 uninitialized_var(di_blkno), suballoc_loc; 2502 u16 suballoc_bit; 2503 2504 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2505 if (status < 0) { 2506 if (status != -ENOENT) 2507 mlog_errno(status); 2508 return status; 2509 } 2510 2511 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, 2512 orphan_name, &orphan_dir, 2513 &di_blkno, &orphan_insert, &inode_ac); 2514 if (status < 0) { 2515 if (status != -ENOSPC) 2516 mlog_errno(status); 2517 goto leave; 2518 } 2519 2520 inode = ocfs2_get_init_inode(dir, mode); 2521 if (IS_ERR(inode)) { 2522 status = PTR_ERR(inode); 2523 inode = NULL; 2524 mlog_errno(status); 2525 goto leave; 2526 } 2527 2528 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2529 if (IS_ERR(handle)) { 2530 status = PTR_ERR(handle); 2531 handle = NULL; 2532 mlog_errno(status); 2533 goto leave; 2534 } 2535 2536 status = dquot_alloc_inode(inode); 2537 if (status) 2538 goto leave; 2539 did_quota_inode = 1; 2540 2541 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, 2542 &suballoc_loc, 2543 &suballoc_bit, di_blkno); 2544 if (status < 0) { 2545 mlog_errno(status); 2546 goto leave; 2547 } 2548 2549 clear_nlink(inode); 2550 /* do the real work now. */ 2551 status = __ocfs2_mknod_locked(dir, inode, 2552 0, &new_di_bh, parent_di_bh, handle, 2553 inode_ac, di_blkno, suballoc_loc, 2554 suballoc_bit); 2555 if (status < 0) { 2556 mlog_errno(status); 2557 goto leave; 2558 } 2559 2560 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, 2561 &orphan_insert, orphan_dir, false); 2562 if (status < 0) { 2563 mlog_errno(status); 2564 goto leave; 2565 } 2566 2567 /* get open lock so that only nodes can't remove it from orphan dir. */ 2568 status = ocfs2_open_lock(inode); 2569 if (status < 0) 2570 mlog_errno(status); 2571 2572 insert_inode_hash(inode); 2573 leave: 2574 if (status < 0 && did_quota_inode) 2575 dquot_free_inode(inode); 2576 if (handle) 2577 ocfs2_commit_trans(osb, handle); 2578 2579 if (orphan_dir) { 2580 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2581 ocfs2_inode_unlock(orphan_dir, 1); 2582 inode_unlock(orphan_dir); 2583 iput(orphan_dir); 2584 } 2585 2586 if ((status < 0) && inode) { 2587 clear_nlink(inode); 2588 iput(inode); 2589 } 2590 2591 if (inode_ac) 2592 ocfs2_free_alloc_context(inode_ac); 2593 2594 brelse(new_di_bh); 2595 2596 if (!status) 2597 *new_inode = inode; 2598 2599 ocfs2_free_dir_lookup_result(&orphan_insert); 2600 2601 ocfs2_inode_unlock(dir, 1); 2602 brelse(parent_di_bh); 2603 return status; 2604 } 2605 2606 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, 2607 struct inode *inode) 2608 { 2609 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2610 struct inode *orphan_dir_inode = NULL; 2611 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2612 struct buffer_head *di_bh = NULL; 2613 int status = 0; 2614 handle_t *handle = NULL; 2615 struct ocfs2_dinode *di = NULL; 2616 2617 status = ocfs2_inode_lock(inode, &di_bh, 1); 2618 if (status < 0) { 2619 mlog_errno(status); 2620 goto bail; 2621 } 2622 2623 di = (struct ocfs2_dinode *) di_bh->b_data; 2624 /* 2625 * Another append dio crashed? 2626 * If so, manually recover it first. 2627 */ 2628 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 2629 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode)); 2630 if (status < 0) { 2631 if (status != -ENOSPC) 2632 mlog_errno(status); 2633 goto bail_unlock_inode; 2634 } 2635 2636 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0); 2637 if (status < 0) { 2638 mlog_errno(status); 2639 goto bail_unlock_inode; 2640 } 2641 } 2642 2643 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, 2644 OCFS2_I(inode)->ip_blkno, 2645 orphan_name, 2646 &orphan_insert, 2647 true); 2648 if (status < 0) { 2649 mlog_errno(status); 2650 goto bail_unlock_inode; 2651 } 2652 2653 handle = ocfs2_start_trans(osb, 2654 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); 2655 if (IS_ERR(handle)) { 2656 status = PTR_ERR(handle); 2657 goto bail_unlock_orphan; 2658 } 2659 2660 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, 2661 &orphan_insert, orphan_dir_inode, true); 2662 if (status) 2663 mlog_errno(status); 2664 2665 ocfs2_commit_trans(osb, handle); 2666 2667 bail_unlock_orphan: 2668 ocfs2_inode_unlock(orphan_dir_inode, 1); 2669 inode_unlock(orphan_dir_inode); 2670 iput(orphan_dir_inode); 2671 2672 ocfs2_free_dir_lookup_result(&orphan_insert); 2673 2674 bail_unlock_inode: 2675 ocfs2_inode_unlock(inode, 1); 2676 brelse(di_bh); 2677 2678 bail: 2679 return status; 2680 } 2681 2682 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, 2683 struct inode *inode, struct buffer_head *di_bh, 2684 int update_isize, loff_t end) 2685 { 2686 struct inode *orphan_dir_inode = NULL; 2687 struct buffer_head *orphan_dir_bh = NULL; 2688 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2689 handle_t *handle = NULL; 2690 int status = 0; 2691 2692 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2693 ORPHAN_DIR_SYSTEM_INODE, 2694 le16_to_cpu(di->i_dio_orphaned_slot)); 2695 if (!orphan_dir_inode) { 2696 status = -ENOENT; 2697 mlog_errno(status); 2698 goto bail; 2699 } 2700 2701 inode_lock(orphan_dir_inode); 2702 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2703 if (status < 0) { 2704 inode_unlock(orphan_dir_inode); 2705 iput(orphan_dir_inode); 2706 mlog_errno(status); 2707 goto bail; 2708 } 2709 2710 handle = ocfs2_start_trans(osb, 2711 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); 2712 if (IS_ERR(handle)) { 2713 status = PTR_ERR(handle); 2714 goto bail_unlock_orphan; 2715 } 2716 2717 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); 2718 2719 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, 2720 inode, orphan_dir_bh, true); 2721 if (status < 0) { 2722 mlog_errno(status); 2723 goto bail_commit; 2724 } 2725 2726 status = ocfs2_journal_access_di(handle, 2727 INODE_CACHE(inode), 2728 di_bh, 2729 OCFS2_JOURNAL_ACCESS_WRITE); 2730 if (status < 0) { 2731 mlog_errno(status); 2732 goto bail_commit; 2733 } 2734 2735 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2736 di->i_dio_orphaned_slot = 0; 2737 2738 if (update_isize) { 2739 status = ocfs2_set_inode_size(handle, inode, di_bh, end); 2740 if (status) 2741 mlog_errno(status); 2742 } else 2743 ocfs2_journal_dirty(handle, di_bh); 2744 2745 bail_commit: 2746 ocfs2_commit_trans(osb, handle); 2747 2748 bail_unlock_orphan: 2749 ocfs2_inode_unlock(orphan_dir_inode, 1); 2750 inode_unlock(orphan_dir_inode); 2751 brelse(orphan_dir_bh); 2752 iput(orphan_dir_inode); 2753 2754 bail: 2755 return status; 2756 } 2757 2758 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2759 struct inode *inode, 2760 struct dentry *dentry) 2761 { 2762 int status = 0; 2763 struct buffer_head *parent_di_bh = NULL; 2764 handle_t *handle = NULL; 2765 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2766 struct ocfs2_dinode *dir_di, *di; 2767 struct inode *orphan_dir_inode = NULL; 2768 struct buffer_head *orphan_dir_bh = NULL; 2769 struct buffer_head *di_bh = NULL; 2770 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2771 2772 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, 2773 dentry->d_name.len, dentry->d_name.name, 2774 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2775 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2776 2777 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2778 if (status < 0) { 2779 if (status != -ENOENT) 2780 mlog_errno(status); 2781 return status; 2782 } 2783 2784 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2785 if (!dir_di->i_links_count) { 2786 /* can't make a file in a deleted directory. */ 2787 status = -ENOENT; 2788 goto leave; 2789 } 2790 2791 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2792 dentry->d_name.len); 2793 if (status) 2794 goto leave; 2795 2796 /* get a spot inside the dir. */ 2797 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2798 dentry->d_name.name, 2799 dentry->d_name.len, &lookup); 2800 if (status < 0) { 2801 mlog_errno(status); 2802 goto leave; 2803 } 2804 2805 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2806 ORPHAN_DIR_SYSTEM_INODE, 2807 osb->slot_num); 2808 if (!orphan_dir_inode) { 2809 status = -ENOENT; 2810 mlog_errno(status); 2811 goto leave; 2812 } 2813 2814 inode_lock(orphan_dir_inode); 2815 2816 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2817 if (status < 0) { 2818 mlog_errno(status); 2819 inode_unlock(orphan_dir_inode); 2820 iput(orphan_dir_inode); 2821 goto leave; 2822 } 2823 2824 status = ocfs2_read_inode_block(inode, &di_bh); 2825 if (status < 0) { 2826 mlog_errno(status); 2827 goto orphan_unlock; 2828 } 2829 2830 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2831 if (IS_ERR(handle)) { 2832 status = PTR_ERR(handle); 2833 handle = NULL; 2834 mlog_errno(status); 2835 goto orphan_unlock; 2836 } 2837 2838 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2839 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2840 if (status < 0) { 2841 mlog_errno(status); 2842 goto out_commit; 2843 } 2844 2845 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2846 orphan_dir_bh, false); 2847 if (status < 0) { 2848 mlog_errno(status); 2849 goto out_commit; 2850 } 2851 2852 di = (struct ocfs2_dinode *)di_bh->b_data; 2853 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); 2854 di->i_orphaned_slot = 0; 2855 set_nlink(inode, 1); 2856 ocfs2_set_links_count(di, inode->i_nlink); 2857 ocfs2_update_inode_fsync_trans(handle, inode, 1); 2858 ocfs2_journal_dirty(handle, di_bh); 2859 2860 status = ocfs2_add_entry(handle, dentry, inode, 2861 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2862 &lookup); 2863 if (status < 0) { 2864 mlog_errno(status); 2865 goto out_commit; 2866 } 2867 2868 status = ocfs2_dentry_attach_lock(dentry, inode, 2869 OCFS2_I(dir)->ip_blkno); 2870 if (status) { 2871 mlog_errno(status); 2872 goto out_commit; 2873 } 2874 2875 d_instantiate(dentry, inode); 2876 status = 0; 2877 out_commit: 2878 ocfs2_commit_trans(osb, handle); 2879 orphan_unlock: 2880 ocfs2_inode_unlock(orphan_dir_inode, 1); 2881 inode_unlock(orphan_dir_inode); 2882 iput(orphan_dir_inode); 2883 leave: 2884 2885 ocfs2_inode_unlock(dir, 1); 2886 2887 brelse(di_bh); 2888 brelse(parent_di_bh); 2889 brelse(orphan_dir_bh); 2890 2891 ocfs2_free_dir_lookup_result(&lookup); 2892 2893 if (status) 2894 mlog_errno(status); 2895 2896 return status; 2897 } 2898 2899 const struct inode_operations ocfs2_dir_iops = { 2900 .create = ocfs2_create, 2901 .lookup = ocfs2_lookup, 2902 .link = ocfs2_link, 2903 .unlink = ocfs2_unlink, 2904 .rmdir = ocfs2_unlink, 2905 .symlink = ocfs2_symlink, 2906 .mkdir = ocfs2_mkdir, 2907 .mknod = ocfs2_mknod, 2908 .rename = ocfs2_rename, 2909 .setattr = ocfs2_setattr, 2910 .getattr = ocfs2_getattr, 2911 .permission = ocfs2_permission, 2912 .listxattr = ocfs2_listxattr, 2913 .fiemap = ocfs2_fiemap, 2914 .get_acl = ocfs2_iop_get_acl, 2915 .set_acl = ocfs2_iop_set_acl, 2916 }; 2917