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 leave; 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 leave; 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 leave; 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 leave; 441 } 442 443 insert_inode_hash(inode); 444 d_instantiate(dentry, inode); 445 status = 0; 446 leave: 447 if (status < 0 && did_quota_inode) 448 dquot_free_inode(inode); 449 if (handle) 450 ocfs2_commit_trans(osb, handle); 451 452 ocfs2_inode_unlock(dir, 1); 453 if (did_block_signals) 454 ocfs2_unblock_signals(&oldset); 455 456 brelse(new_fe_bh); 457 brelse(parent_fe_bh); 458 kfree(si.value); 459 460 ocfs2_free_dir_lookup_result(&lookup); 461 462 if (inode_ac) 463 ocfs2_free_alloc_context(inode_ac); 464 465 if (data_ac) 466 ocfs2_free_alloc_context(data_ac); 467 468 if (meta_ac) 469 ocfs2_free_alloc_context(meta_ac); 470 471 /* 472 * We should call iput after the i_mutex of the bitmap been 473 * unlocked in ocfs2_free_alloc_context, or the 474 * ocfs2_delete_inode will mutex_lock again. 475 */ 476 if ((status < 0) && inode) { 477 if (dl) 478 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 479 480 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 481 clear_nlink(inode); 482 iput(inode); 483 } 484 485 if (status) 486 mlog_errno(status); 487 488 return status; 489 } 490 491 static int __ocfs2_mknod_locked(struct inode *dir, 492 struct inode *inode, 493 dev_t dev, 494 struct buffer_head **new_fe_bh, 495 struct buffer_head *parent_fe_bh, 496 handle_t *handle, 497 struct ocfs2_alloc_context *inode_ac, 498 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit) 499 { 500 int status = 0; 501 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 502 struct ocfs2_dinode *fe = NULL; 503 struct ocfs2_extent_list *fel; 504 u16 feat; 505 struct ocfs2_inode_info *oi = OCFS2_I(inode); 506 struct timespec64 ts; 507 508 *new_fe_bh = NULL; 509 510 /* populate as many fields early on as possible - many of 511 * these are used by the support functions here and in 512 * callers. */ 513 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 514 oi->ip_blkno = fe_blkno; 515 spin_lock(&osb->osb_lock); 516 inode->i_generation = osb->s_next_generation++; 517 spin_unlock(&osb->osb_lock); 518 519 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 520 if (!*new_fe_bh) { 521 status = -ENOMEM; 522 mlog_errno(status); 523 goto leave; 524 } 525 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh); 526 527 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 528 *new_fe_bh, 529 OCFS2_JOURNAL_ACCESS_CREATE); 530 if (status < 0) { 531 mlog_errno(status); 532 goto leave; 533 } 534 535 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 536 memset(fe, 0, osb->sb->s_blocksize); 537 538 fe->i_generation = cpu_to_le32(inode->i_generation); 539 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 540 fe->i_blkno = cpu_to_le64(fe_blkno); 541 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc); 542 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 543 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); 544 fe->i_uid = cpu_to_le32(i_uid_read(inode)); 545 fe->i_gid = cpu_to_le32(i_gid_read(inode)); 546 fe->i_mode = cpu_to_le16(inode->i_mode); 547 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 548 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 549 550 ocfs2_set_links_count(fe, inode->i_nlink); 551 552 fe->i_last_eb_blk = 0; 553 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 554 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL); 555 ktime_get_real_ts64(&ts); 556 fe->i_atime = fe->i_ctime = fe->i_mtime = 557 cpu_to_le64(ts.tv_sec); 558 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 559 cpu_to_le32(ts.tv_nsec); 560 fe->i_dtime = 0; 561 562 /* 563 * If supported, directories start with inline data. If inline 564 * isn't supported, but indexing is, we start them as indexed. 565 */ 566 feat = le16_to_cpu(fe->i_dyn_features); 567 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) { 568 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); 569 570 fe->id2.i_data.id_count = cpu_to_le16( 571 ocfs2_max_inline_data_with_xattr(osb->sb, fe)); 572 } else { 573 fel = &fe->id2.i_list; 574 fel->l_tree_depth = 0; 575 fel->l_next_free_rec = 0; 576 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 577 } 578 579 ocfs2_journal_dirty(handle, *new_fe_bh); 580 581 ocfs2_populate_inode(inode, fe, 1); 582 ocfs2_ci_set_new(osb, INODE_CACHE(inode)); 583 if (!ocfs2_mount_local(osb)) { 584 status = ocfs2_create_new_inode_locks(inode); 585 if (status < 0) 586 mlog_errno(status); 587 } 588 589 ocfs2_update_inode_fsync_trans(handle, inode, 1); 590 591 leave: 592 if (status < 0) { 593 if (*new_fe_bh) { 594 brelse(*new_fe_bh); 595 *new_fe_bh = NULL; 596 } 597 } 598 599 if (status) 600 mlog_errno(status); 601 return status; 602 } 603 604 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 605 struct inode *dir, 606 struct inode *inode, 607 dev_t dev, 608 struct buffer_head **new_fe_bh, 609 struct buffer_head *parent_fe_bh, 610 handle_t *handle, 611 struct ocfs2_alloc_context *inode_ac) 612 { 613 int status = 0; 614 u64 suballoc_loc, fe_blkno = 0; 615 u16 suballoc_bit; 616 617 *new_fe_bh = NULL; 618 619 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh, 620 inode_ac, &suballoc_loc, 621 &suballoc_bit, &fe_blkno); 622 if (status < 0) { 623 mlog_errno(status); 624 return status; 625 } 626 627 status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, 628 parent_fe_bh, handle, inode_ac, 629 fe_blkno, suballoc_loc, suballoc_bit); 630 if (status < 0) { 631 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit); 632 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode, 633 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1); 634 if (tmp) 635 mlog_errno(tmp); 636 } 637 638 return status; 639 } 640 641 static int ocfs2_mkdir(struct inode *dir, 642 struct dentry *dentry, 643 umode_t mode) 644 { 645 int ret; 646 647 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, 648 OCFS2_I(dir)->ip_blkno, mode); 649 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); 650 if (ret) 651 mlog_errno(ret); 652 653 return ret; 654 } 655 656 static int ocfs2_create(struct inode *dir, 657 struct dentry *dentry, 658 umode_t mode, 659 bool excl) 660 { 661 int ret; 662 663 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name, 664 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode); 665 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); 666 if (ret) 667 mlog_errno(ret); 668 669 return ret; 670 } 671 672 static int ocfs2_link(struct dentry *old_dentry, 673 struct inode *dir, 674 struct dentry *dentry) 675 { 676 handle_t *handle; 677 struct inode *inode = d_inode(old_dentry); 678 struct inode *old_dir = d_inode(old_dentry->d_parent); 679 int err; 680 struct buffer_head *fe_bh = NULL; 681 struct buffer_head *old_dir_bh = NULL; 682 struct buffer_head *parent_fe_bh = NULL; 683 struct ocfs2_dinode *fe = NULL; 684 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 685 struct ocfs2_dir_lookup_result lookup = { NULL, }; 686 sigset_t oldset; 687 u64 old_de_ino; 688 689 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno, 690 old_dentry->d_name.len, old_dentry->d_name.name, 691 dentry->d_name.len, dentry->d_name.name); 692 693 if (S_ISDIR(inode->i_mode)) 694 return -EPERM; 695 696 err = dquot_initialize(dir); 697 if (err) { 698 mlog_errno(err); 699 return err; 700 } 701 702 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 703 &parent_fe_bh, dir, 0); 704 if (err < 0) { 705 if (err != -ENOENT) 706 mlog_errno(err); 707 return err; 708 } 709 710 /* make sure both dirs have bhs 711 * get an extra ref on old_dir_bh if old==new */ 712 if (!parent_fe_bh) { 713 if (old_dir_bh) { 714 parent_fe_bh = old_dir_bh; 715 get_bh(parent_fe_bh); 716 } else { 717 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str); 718 err = -EIO; 719 goto out; 720 } 721 } 722 723 if (!dir->i_nlink) { 724 err = -ENOENT; 725 goto out; 726 } 727 728 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 729 old_dentry->d_name.len, &old_de_ino); 730 if (err) { 731 err = -ENOENT; 732 goto out; 733 } 734 735 /* 736 * Check whether another node removed the source inode while we 737 * were in the vfs. 738 */ 739 if (old_de_ino != OCFS2_I(inode)->ip_blkno) { 740 err = -ENOENT; 741 goto out; 742 } 743 744 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 745 dentry->d_name.len); 746 if (err) 747 goto out; 748 749 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 750 dentry->d_name.name, 751 dentry->d_name.len, &lookup); 752 if (err < 0) { 753 mlog_errno(err); 754 goto out; 755 } 756 757 err = ocfs2_inode_lock(inode, &fe_bh, 1); 758 if (err < 0) { 759 if (err != -ENOENT) 760 mlog_errno(err); 761 goto out; 762 } 763 764 fe = (struct ocfs2_dinode *) fe_bh->b_data; 765 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { 766 err = -EMLINK; 767 goto out_unlock_inode; 768 } 769 770 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); 771 if (IS_ERR(handle)) { 772 err = PTR_ERR(handle); 773 handle = NULL; 774 mlog_errno(err); 775 goto out_unlock_inode; 776 } 777 778 /* Starting to change things, restart is no longer possible. */ 779 ocfs2_block_signals(&oldset); 780 781 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 782 OCFS2_JOURNAL_ACCESS_WRITE); 783 if (err < 0) { 784 mlog_errno(err); 785 goto out_commit; 786 } 787 788 inc_nlink(inode); 789 inode->i_ctime = current_time(inode); 790 ocfs2_set_links_count(fe, inode->i_nlink); 791 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 792 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 793 ocfs2_journal_dirty(handle, fe_bh); 794 795 err = ocfs2_add_entry(handle, dentry, inode, 796 OCFS2_I(inode)->ip_blkno, 797 parent_fe_bh, &lookup); 798 if (err) { 799 ocfs2_add_links_count(fe, -1); 800 drop_nlink(inode); 801 mlog_errno(err); 802 goto out_commit; 803 } 804 805 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 806 if (err) { 807 mlog_errno(err); 808 goto out_commit; 809 } 810 811 ihold(inode); 812 d_instantiate(dentry, inode); 813 814 out_commit: 815 ocfs2_commit_trans(osb, handle); 816 ocfs2_unblock_signals(&oldset); 817 out_unlock_inode: 818 ocfs2_inode_unlock(inode, 1); 819 820 out: 821 ocfs2_double_unlock(old_dir, dir); 822 823 brelse(fe_bh); 824 brelse(parent_fe_bh); 825 brelse(old_dir_bh); 826 827 ocfs2_free_dir_lookup_result(&lookup); 828 829 if (err) 830 mlog_errno(err); 831 832 return err; 833 } 834 835 /* 836 * Takes and drops an exclusive lock on the given dentry. This will 837 * force other nodes to drop it. 838 */ 839 static int ocfs2_remote_dentry_delete(struct dentry *dentry) 840 { 841 int ret; 842 843 ret = ocfs2_dentry_lock(dentry, 1); 844 if (ret) 845 mlog_errno(ret); 846 else 847 ocfs2_dentry_unlock(dentry, 1); 848 849 return ret; 850 } 851 852 static inline int ocfs2_inode_is_unlinkable(struct inode *inode) 853 { 854 if (S_ISDIR(inode->i_mode)) { 855 if (inode->i_nlink == 2) 856 return 1; 857 return 0; 858 } 859 860 if (inode->i_nlink == 1) 861 return 1; 862 return 0; 863 } 864 865 static int ocfs2_unlink(struct inode *dir, 866 struct dentry *dentry) 867 { 868 int status; 869 int child_locked = 0; 870 bool is_unlinkable = false; 871 struct inode *inode = d_inode(dentry); 872 struct inode *orphan_dir = NULL; 873 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 874 u64 blkno; 875 struct ocfs2_dinode *fe = NULL; 876 struct buffer_head *fe_bh = NULL; 877 struct buffer_head *parent_node_bh = NULL; 878 handle_t *handle = NULL; 879 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 880 struct ocfs2_dir_lookup_result lookup = { NULL, }; 881 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 882 883 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, 884 dentry->d_name.name, 885 (unsigned long long)OCFS2_I(dir)->ip_blkno, 886 (unsigned long long)OCFS2_I(inode)->ip_blkno); 887 888 status = dquot_initialize(dir); 889 if (status) { 890 mlog_errno(status); 891 return status; 892 } 893 894 BUG_ON(d_inode(dentry->d_parent) != dir); 895 896 if (inode == osb->root_inode) 897 return -EPERM; 898 899 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 900 OI_LS_PARENT); 901 if (status < 0) { 902 if (status != -ENOENT) 903 mlog_errno(status); 904 return status; 905 } 906 907 status = ocfs2_find_files_on_disk(dentry->d_name.name, 908 dentry->d_name.len, &blkno, dir, 909 &lookup); 910 if (status < 0) { 911 if (status != -ENOENT) 912 mlog_errno(status); 913 goto leave; 914 } 915 916 if (OCFS2_I(inode)->ip_blkno != blkno) { 917 status = -ENOENT; 918 919 trace_ocfs2_unlink_noent( 920 (unsigned long long)OCFS2_I(inode)->ip_blkno, 921 (unsigned long long)blkno, 922 OCFS2_I(inode)->ip_flags); 923 goto leave; 924 } 925 926 status = ocfs2_inode_lock(inode, &fe_bh, 1); 927 if (status < 0) { 928 if (status != -ENOENT) 929 mlog_errno(status); 930 goto leave; 931 } 932 child_locked = 1; 933 934 if (S_ISDIR(inode->i_mode)) { 935 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 936 status = -ENOTEMPTY; 937 goto leave; 938 } 939 } 940 941 status = ocfs2_remote_dentry_delete(dentry); 942 if (status < 0) { 943 /* This remote delete should succeed under all normal 944 * circumstances. */ 945 mlog_errno(status); 946 goto leave; 947 } 948 949 if (ocfs2_inode_is_unlinkable(inode)) { 950 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 951 OCFS2_I(inode)->ip_blkno, 952 orphan_name, &orphan_insert, 953 false); 954 if (status < 0) { 955 mlog_errno(status); 956 goto leave; 957 } 958 is_unlinkable = true; 959 } 960 961 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 962 if (IS_ERR(handle)) { 963 status = PTR_ERR(handle); 964 handle = NULL; 965 mlog_errno(status); 966 goto leave; 967 } 968 969 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 970 OCFS2_JOURNAL_ACCESS_WRITE); 971 if (status < 0) { 972 mlog_errno(status); 973 goto leave; 974 } 975 976 fe = (struct ocfs2_dinode *) fe_bh->b_data; 977 978 /* delete the name from the parent dir */ 979 status = ocfs2_delete_entry(handle, dir, &lookup); 980 if (status < 0) { 981 mlog_errno(status); 982 goto leave; 983 } 984 985 if (S_ISDIR(inode->i_mode)) 986 drop_nlink(inode); 987 drop_nlink(inode); 988 ocfs2_set_links_count(fe, inode->i_nlink); 989 ocfs2_journal_dirty(handle, fe_bh); 990 991 dir->i_ctime = dir->i_mtime = current_time(dir); 992 if (S_ISDIR(inode->i_mode)) 993 drop_nlink(dir); 994 995 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 996 if (status < 0) { 997 mlog_errno(status); 998 if (S_ISDIR(inode->i_mode)) 999 inc_nlink(dir); 1000 goto leave; 1001 } 1002 1003 if (is_unlinkable) { 1004 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, 1005 orphan_name, &orphan_insert, orphan_dir, false); 1006 if (status < 0) 1007 mlog_errno(status); 1008 } 1009 1010 leave: 1011 if (handle) 1012 ocfs2_commit_trans(osb, handle); 1013 1014 if (orphan_dir) { 1015 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1016 ocfs2_inode_unlock(orphan_dir, 1); 1017 inode_unlock(orphan_dir); 1018 iput(orphan_dir); 1019 } 1020 1021 if (child_locked) 1022 ocfs2_inode_unlock(inode, 1); 1023 1024 ocfs2_inode_unlock(dir, 1); 1025 1026 brelse(fe_bh); 1027 brelse(parent_node_bh); 1028 1029 ocfs2_free_dir_lookup_result(&orphan_insert); 1030 ocfs2_free_dir_lookup_result(&lookup); 1031 1032 if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) 1033 mlog_errno(status); 1034 1035 return status; 1036 } 1037 1038 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, 1039 u64 src_inode_no, u64 dest_inode_no) 1040 { 1041 int ret = 0, i = 0; 1042 u64 parent_inode_no = 0; 1043 u64 child_inode_no = src_inode_no; 1044 struct inode *child_inode; 1045 1046 #define MAX_LOOKUP_TIMES 32 1047 while (1) { 1048 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); 1049 if (IS_ERR(child_inode)) { 1050 ret = PTR_ERR(child_inode); 1051 break; 1052 } 1053 1054 ret = ocfs2_inode_lock(child_inode, NULL, 0); 1055 if (ret < 0) { 1056 iput(child_inode); 1057 if (ret != -ENOENT) 1058 mlog_errno(ret); 1059 break; 1060 } 1061 1062 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, 1063 &parent_inode_no); 1064 ocfs2_inode_unlock(child_inode, 0); 1065 iput(child_inode); 1066 if (ret < 0) { 1067 ret = -ENOENT; 1068 break; 1069 } 1070 1071 if (parent_inode_no == dest_inode_no) { 1072 ret = 1; 1073 break; 1074 } 1075 1076 if (parent_inode_no == osb->root_inode->i_ino) { 1077 ret = 0; 1078 break; 1079 } 1080 1081 child_inode_no = parent_inode_no; 1082 1083 if (++i >= MAX_LOOKUP_TIMES) { 1084 mlog(ML_NOTICE, "max lookup times reached, filesystem " 1085 "may have nested directories, " 1086 "src inode: %llu, dest inode: %llu.\n", 1087 (unsigned long long)src_inode_no, 1088 (unsigned long long)dest_inode_no); 1089 ret = 0; 1090 break; 1091 } 1092 } 1093 1094 return ret; 1095 } 1096 1097 /* 1098 * The only place this should be used is rename and link! 1099 * if they have the same id, then the 1st one is the only one locked. 1100 */ 1101 static int ocfs2_double_lock(struct ocfs2_super *osb, 1102 struct buffer_head **bh1, 1103 struct inode *inode1, 1104 struct buffer_head **bh2, 1105 struct inode *inode2, 1106 int rename) 1107 { 1108 int status; 1109 int inode1_is_ancestor, inode2_is_ancestor; 1110 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 1111 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 1112 1113 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 1114 (unsigned long long)oi2->ip_blkno); 1115 1116 if (*bh1) 1117 *bh1 = NULL; 1118 if (*bh2) 1119 *bh2 = NULL; 1120 1121 /* we always want to lock the one with the lower lockid first. 1122 * and if they are nested, we lock ancestor first */ 1123 if (oi1->ip_blkno != oi2->ip_blkno) { 1124 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, 1125 oi1->ip_blkno); 1126 if (inode1_is_ancestor < 0) { 1127 status = inode1_is_ancestor; 1128 goto bail; 1129 } 1130 1131 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, 1132 oi2->ip_blkno); 1133 if (inode2_is_ancestor < 0) { 1134 status = inode2_is_ancestor; 1135 goto bail; 1136 } 1137 1138 if ((inode1_is_ancestor == 1) || 1139 (oi1->ip_blkno < oi2->ip_blkno && 1140 inode2_is_ancestor == 0)) { 1141 /* switch id1 and id2 around */ 1142 swap(bh2, bh1); 1143 swap(inode2, inode1); 1144 } 1145 /* lock id2 */ 1146 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 1147 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); 1148 if (status < 0) { 1149 if (status != -ENOENT) 1150 mlog_errno(status); 1151 goto bail; 1152 } 1153 } 1154 1155 /* lock id1 */ 1156 status = ocfs2_inode_lock_nested(inode1, bh1, 1, 1157 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 1158 if (status < 0) { 1159 /* 1160 * An error return must mean that no cluster locks 1161 * were held on function exit. 1162 */ 1163 if (oi1->ip_blkno != oi2->ip_blkno) { 1164 ocfs2_inode_unlock(inode2, 1); 1165 brelse(*bh2); 1166 *bh2 = NULL; 1167 } 1168 1169 if (status != -ENOENT) 1170 mlog_errno(status); 1171 } 1172 1173 trace_ocfs2_double_lock_end( 1174 (unsigned long long)oi1->ip_blkno, 1175 (unsigned long long)oi2->ip_blkno); 1176 1177 bail: 1178 if (status) 1179 mlog_errno(status); 1180 return status; 1181 } 1182 1183 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1184 { 1185 ocfs2_inode_unlock(inode1, 1); 1186 1187 if (inode1 != inode2) 1188 ocfs2_inode_unlock(inode2, 1); 1189 } 1190 1191 static int ocfs2_rename(struct inode *old_dir, 1192 struct dentry *old_dentry, 1193 struct inode *new_dir, 1194 struct dentry *new_dentry, 1195 unsigned int flags) 1196 { 1197 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1198 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1199 struct inode *old_inode = d_inode(old_dentry); 1200 struct inode *new_inode = d_inode(new_dentry); 1201 struct inode *orphan_dir = NULL; 1202 struct ocfs2_dinode *newfe = NULL; 1203 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1204 struct buffer_head *newfe_bh = NULL; 1205 struct buffer_head *old_inode_bh = NULL; 1206 struct ocfs2_super *osb = NULL; 1207 u64 newfe_blkno, old_de_ino; 1208 handle_t *handle = NULL; 1209 struct buffer_head *old_dir_bh = NULL; 1210 struct buffer_head *new_dir_bh = NULL; 1211 u32 old_dir_nlink = old_dir->i_nlink; 1212 struct ocfs2_dinode *old_di; 1213 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1214 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1215 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1216 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1217 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1218 bool should_add_orphan = false; 1219 1220 if (flags) 1221 return -EINVAL; 1222 1223 /* At some point it might be nice to break this function up a 1224 * bit. */ 1225 1226 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, 1227 old_dentry->d_name.len, old_dentry->d_name.name, 1228 new_dentry->d_name.len, new_dentry->d_name.name); 1229 1230 status = dquot_initialize(old_dir); 1231 if (status) { 1232 mlog_errno(status); 1233 goto bail; 1234 } 1235 status = dquot_initialize(new_dir); 1236 if (status) { 1237 mlog_errno(status); 1238 goto bail; 1239 } 1240 1241 osb = OCFS2_SB(old_dir->i_sb); 1242 1243 if (new_inode) { 1244 if (!igrab(new_inode)) 1245 BUG(); 1246 } 1247 1248 /* Assume a directory hierarchy thusly: 1249 * a/b/c 1250 * a/d 1251 * a,b,c, and d are all directories. 1252 * 1253 * from cwd of 'a' on both nodes: 1254 * node1: mv b/c d 1255 * node2: mv d b/c 1256 * 1257 * And that's why, just like the VFS, we need a file system 1258 * rename lock. */ 1259 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1260 status = ocfs2_rename_lock(osb); 1261 if (status < 0) { 1262 mlog_errno(status); 1263 goto bail; 1264 } 1265 rename_lock = 1; 1266 1267 /* here we cannot guarantee the inodes haven't just been 1268 * changed, so check if they are nested again */ 1269 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, 1270 old_inode->i_ino); 1271 if (status < 0) { 1272 mlog_errno(status); 1273 goto bail; 1274 } else if (status == 1) { 1275 status = -EPERM; 1276 trace_ocfs2_rename_not_permitted( 1277 (unsigned long long)old_inode->i_ino, 1278 (unsigned long long)new_dir->i_ino); 1279 goto bail; 1280 } 1281 } 1282 1283 /* if old and new are the same, this'll just do one lock. */ 1284 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1285 &new_dir_bh, new_dir, 1); 1286 if (status < 0) { 1287 mlog_errno(status); 1288 goto bail; 1289 } 1290 parents_locked = 1; 1291 1292 if (!new_dir->i_nlink) { 1293 status = -EACCES; 1294 goto bail; 1295 } 1296 1297 /* make sure both dirs have bhs 1298 * get an extra ref on old_dir_bh if old==new */ 1299 if (!new_dir_bh) { 1300 if (old_dir_bh) { 1301 new_dir_bh = old_dir_bh; 1302 get_bh(new_dir_bh); 1303 } else { 1304 mlog(ML_ERROR, "no old_dir_bh!\n"); 1305 status = -EIO; 1306 goto bail; 1307 } 1308 } 1309 1310 /* 1311 * Aside from allowing a meta data update, the locking here 1312 * also ensures that the downconvert thread on other nodes 1313 * won't have to concurrently downconvert the inode and the 1314 * dentry locks. 1315 */ 1316 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1317 OI_LS_PARENT); 1318 if (status < 0) { 1319 if (status != -ENOENT) 1320 mlog_errno(status); 1321 goto bail; 1322 } 1323 old_child_locked = 1; 1324 1325 status = ocfs2_remote_dentry_delete(old_dentry); 1326 if (status < 0) { 1327 mlog_errno(status); 1328 goto bail; 1329 } 1330 1331 if (S_ISDIR(old_inode->i_mode)) { 1332 u64 old_inode_parent; 1333 1334 update_dot_dot = 1; 1335 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1336 old_inode, 1337 &old_inode_dot_dot_res); 1338 if (status) { 1339 status = -EIO; 1340 goto bail; 1341 } 1342 1343 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1344 status = -EIO; 1345 goto bail; 1346 } 1347 1348 if (!new_inode && new_dir != old_dir && 1349 new_dir->i_nlink >= ocfs2_link_max(osb)) { 1350 status = -EMLINK; 1351 goto bail; 1352 } 1353 } 1354 1355 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1356 old_dentry->d_name.len, 1357 &old_de_ino); 1358 if (status) { 1359 status = -ENOENT; 1360 goto bail; 1361 } 1362 1363 /* 1364 * Check for inode number is _not_ due to possible IO errors. 1365 * We might rmdir the source, keep it as pwd of some process 1366 * and merrily kill the link to whatever was created under the 1367 * same name. Goodbye sticky bit ;-< 1368 */ 1369 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1370 status = -ENOENT; 1371 goto bail; 1372 } 1373 1374 /* check if the target already exists (in which case we need 1375 * to delete it */ 1376 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1377 new_dentry->d_name.len, 1378 &newfe_blkno, new_dir, 1379 &target_lookup_res); 1380 /* The only error we allow here is -ENOENT because the new 1381 * file not existing is perfectly valid. */ 1382 if ((status < 0) && (status != -ENOENT)) { 1383 /* If we cannot find the file specified we should just */ 1384 /* return the error... */ 1385 mlog_errno(status); 1386 goto bail; 1387 } 1388 if (status == 0) 1389 target_exists = 1; 1390 1391 if (!target_exists && new_inode) { 1392 /* 1393 * Target was unlinked by another node while we were 1394 * waiting to get to ocfs2_rename(). There isn't 1395 * anything we can do here to help the situation, so 1396 * bubble up the appropriate error. 1397 */ 1398 status = -ENOENT; 1399 goto bail; 1400 } 1401 1402 /* In case we need to overwrite an existing file, we blow it 1403 * away first */ 1404 if (target_exists) { 1405 /* VFS didn't think there existed an inode here, but 1406 * someone else in the cluster must have raced our 1407 * rename to create one. Today we error cleanly, in 1408 * the future we should consider calling iget to build 1409 * a new struct inode for this entry. */ 1410 if (!new_inode) { 1411 status = -EACCES; 1412 1413 trace_ocfs2_rename_target_exists(new_dentry->d_name.len, 1414 new_dentry->d_name.name); 1415 goto bail; 1416 } 1417 1418 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1419 status = -EACCES; 1420 1421 trace_ocfs2_rename_disagree( 1422 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1423 (unsigned long long)newfe_blkno, 1424 OCFS2_I(new_inode)->ip_flags); 1425 goto bail; 1426 } 1427 1428 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1429 if (status < 0) { 1430 if (status != -ENOENT) 1431 mlog_errno(status); 1432 goto bail; 1433 } 1434 new_child_locked = 1; 1435 1436 status = ocfs2_remote_dentry_delete(new_dentry); 1437 if (status < 0) { 1438 mlog_errno(status); 1439 goto bail; 1440 } 1441 1442 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1443 1444 trace_ocfs2_rename_over_existing( 1445 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1446 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1447 1448 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1449 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1450 OCFS2_I(new_inode)->ip_blkno, 1451 orphan_name, &orphan_insert, 1452 false); 1453 if (status < 0) { 1454 mlog_errno(status); 1455 goto bail; 1456 } 1457 should_add_orphan = true; 1458 } 1459 } else { 1460 BUG_ON(d_inode(new_dentry->d_parent) != new_dir); 1461 1462 status = ocfs2_check_dir_for_entry(new_dir, 1463 new_dentry->d_name.name, 1464 new_dentry->d_name.len); 1465 if (status) 1466 goto bail; 1467 1468 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1469 new_dentry->d_name.name, 1470 new_dentry->d_name.len, 1471 &target_insert); 1472 if (status < 0) { 1473 mlog_errno(status); 1474 goto bail; 1475 } 1476 } 1477 1478 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1479 if (IS_ERR(handle)) { 1480 status = PTR_ERR(handle); 1481 handle = NULL; 1482 mlog_errno(status); 1483 goto bail; 1484 } 1485 1486 if (target_exists) { 1487 if (S_ISDIR(new_inode->i_mode)) { 1488 if (new_inode->i_nlink != 2 || 1489 !ocfs2_empty_dir(new_inode)) { 1490 status = -ENOTEMPTY; 1491 goto bail; 1492 } 1493 } 1494 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1495 newfe_bh, 1496 OCFS2_JOURNAL_ACCESS_WRITE); 1497 if (status < 0) { 1498 mlog_errno(status); 1499 goto bail; 1500 } 1501 1502 /* change the dirent to point to the correct inode */ 1503 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1504 old_inode); 1505 if (status < 0) { 1506 mlog_errno(status); 1507 goto bail; 1508 } 1509 inode_inc_iversion(new_dir); 1510 1511 if (S_ISDIR(new_inode->i_mode)) 1512 ocfs2_set_links_count(newfe, 0); 1513 else 1514 ocfs2_add_links_count(newfe, -1); 1515 ocfs2_journal_dirty(handle, newfe_bh); 1516 if (should_add_orphan) { 1517 status = ocfs2_orphan_add(osb, handle, new_inode, 1518 newfe_bh, orphan_name, 1519 &orphan_insert, orphan_dir, false); 1520 if (status < 0) { 1521 mlog_errno(status); 1522 goto bail; 1523 } 1524 } 1525 } else { 1526 /* if the name was not found in new_dir, add it now */ 1527 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1528 OCFS2_I(old_inode)->ip_blkno, 1529 new_dir_bh, &target_insert); 1530 } 1531 1532 old_inode->i_ctime = current_time(old_inode); 1533 mark_inode_dirty(old_inode); 1534 1535 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1536 old_inode_bh, 1537 OCFS2_JOURNAL_ACCESS_WRITE); 1538 if (status >= 0) { 1539 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1540 1541 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); 1542 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); 1543 ocfs2_journal_dirty(handle, old_inode_bh); 1544 } else 1545 mlog_errno(status); 1546 1547 /* 1548 * Now that the name has been added to new_dir, remove the old name. 1549 * 1550 * We don't keep any directory entry context around until now 1551 * because the insert might have changed the type of directory 1552 * we're dealing with. 1553 */ 1554 status = ocfs2_find_entry(old_dentry->d_name.name, 1555 old_dentry->d_name.len, old_dir, 1556 &old_entry_lookup); 1557 if (status) { 1558 if (!is_journal_aborted(osb->journal->j_journal)) { 1559 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1560 "is not deleted.", 1561 new_dentry->d_name.len, new_dentry->d_name.name, 1562 old_dentry->d_name.len, old_dentry->d_name.name); 1563 } 1564 goto bail; 1565 } 1566 1567 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1568 if (status < 0) { 1569 mlog_errno(status); 1570 if (!is_journal_aborted(osb->journal->j_journal)) { 1571 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1572 "is not deleted.", 1573 new_dentry->d_name.len, new_dentry->d_name.name, 1574 old_dentry->d_name.len, old_dentry->d_name.name); 1575 } 1576 goto bail; 1577 } 1578 1579 if (new_inode) { 1580 drop_nlink(new_inode); 1581 new_inode->i_ctime = current_time(new_inode); 1582 } 1583 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir); 1584 1585 if (update_dot_dot) { 1586 status = ocfs2_update_entry(old_inode, handle, 1587 &old_inode_dot_dot_res, new_dir); 1588 drop_nlink(old_dir); 1589 if (new_inode) { 1590 drop_nlink(new_inode); 1591 } else { 1592 inc_nlink(new_dir); 1593 mark_inode_dirty(new_dir); 1594 } 1595 } 1596 mark_inode_dirty(old_dir); 1597 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1598 if (new_inode) { 1599 mark_inode_dirty(new_inode); 1600 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1601 } 1602 1603 if (old_dir != new_dir) { 1604 /* Keep the same times on both directories.*/ 1605 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; 1606 1607 /* 1608 * This will also pick up the i_nlink change from the 1609 * block above. 1610 */ 1611 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1612 } 1613 1614 if (old_dir_nlink != old_dir->i_nlink) { 1615 if (!old_dir_bh) { 1616 mlog(ML_ERROR, "need to change nlink for old dir " 1617 "%llu from %d to %d but bh is NULL!\n", 1618 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1619 (int)old_dir_nlink, old_dir->i_nlink); 1620 } else { 1621 struct ocfs2_dinode *fe; 1622 status = ocfs2_journal_access_di(handle, 1623 INODE_CACHE(old_dir), 1624 old_dir_bh, 1625 OCFS2_JOURNAL_ACCESS_WRITE); 1626 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1627 ocfs2_set_links_count(fe, old_dir->i_nlink); 1628 ocfs2_journal_dirty(handle, old_dir_bh); 1629 } 1630 } 1631 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1632 status = 0; 1633 bail: 1634 if (handle) 1635 ocfs2_commit_trans(osb, handle); 1636 1637 if (orphan_dir) { 1638 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1639 ocfs2_inode_unlock(orphan_dir, 1); 1640 inode_unlock(orphan_dir); 1641 iput(orphan_dir); 1642 } 1643 1644 if (new_child_locked) 1645 ocfs2_inode_unlock(new_inode, 1); 1646 1647 if (old_child_locked) 1648 ocfs2_inode_unlock(old_inode, 1); 1649 1650 if (parents_locked) 1651 ocfs2_double_unlock(old_dir, new_dir); 1652 1653 if (rename_lock) 1654 ocfs2_rename_unlock(osb); 1655 1656 if (new_inode) 1657 sync_mapping_buffers(old_inode->i_mapping); 1658 1659 iput(new_inode); 1660 1661 ocfs2_free_dir_lookup_result(&target_lookup_res); 1662 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1663 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1664 ocfs2_free_dir_lookup_result(&orphan_insert); 1665 ocfs2_free_dir_lookup_result(&target_insert); 1666 1667 brelse(newfe_bh); 1668 brelse(old_inode_bh); 1669 brelse(old_dir_bh); 1670 brelse(new_dir_bh); 1671 1672 if (status) 1673 mlog_errno(status); 1674 1675 return status; 1676 } 1677 1678 /* 1679 * we expect i_size = strlen(symname). Copy symname into the file 1680 * data, including the null terminator. 1681 */ 1682 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1683 handle_t *handle, 1684 struct inode *inode, 1685 const char *symname) 1686 { 1687 struct buffer_head **bhs = NULL; 1688 const char *c; 1689 struct super_block *sb = osb->sb; 1690 u64 p_blkno, p_blocks; 1691 int virtual, blocks, status, i, bytes_left; 1692 1693 bytes_left = i_size_read(inode) + 1; 1694 /* we can't trust i_blocks because we're actually going to 1695 * write i_size + 1 bytes. */ 1696 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1697 1698 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, 1699 i_size_read(inode), blocks); 1700 1701 /* Sanity check -- make sure we're going to fit. */ 1702 if (bytes_left > 1703 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1704 status = -EIO; 1705 mlog_errno(status); 1706 goto bail; 1707 } 1708 1709 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1710 if (!bhs) { 1711 status = -ENOMEM; 1712 mlog_errno(status); 1713 goto bail; 1714 } 1715 1716 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1717 NULL); 1718 if (status < 0) { 1719 mlog_errno(status); 1720 goto bail; 1721 } 1722 1723 /* links can never be larger than one cluster so we know this 1724 * is all going to be contiguous, but do a sanity check 1725 * anyway. */ 1726 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1727 status = -EIO; 1728 mlog_errno(status); 1729 goto bail; 1730 } 1731 1732 virtual = 0; 1733 while(bytes_left > 0) { 1734 c = &symname[virtual * sb->s_blocksize]; 1735 1736 bhs[virtual] = sb_getblk(sb, p_blkno); 1737 if (!bhs[virtual]) { 1738 status = -ENOMEM; 1739 mlog_errno(status); 1740 goto bail; 1741 } 1742 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1743 bhs[virtual]); 1744 1745 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1746 bhs[virtual], 1747 OCFS2_JOURNAL_ACCESS_CREATE); 1748 if (status < 0) { 1749 mlog_errno(status); 1750 goto bail; 1751 } 1752 1753 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1754 1755 memcpy(bhs[virtual]->b_data, c, 1756 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1757 bytes_left); 1758 1759 ocfs2_journal_dirty(handle, bhs[virtual]); 1760 1761 virtual++; 1762 p_blkno++; 1763 bytes_left -= sb->s_blocksize; 1764 } 1765 1766 status = 0; 1767 bail: 1768 1769 if (bhs) { 1770 for(i = 0; i < blocks; i++) 1771 brelse(bhs[i]); 1772 kfree(bhs); 1773 } 1774 1775 if (status) 1776 mlog_errno(status); 1777 return status; 1778 } 1779 1780 static int ocfs2_symlink(struct inode *dir, 1781 struct dentry *dentry, 1782 const char *symname) 1783 { 1784 int status, l, credits; 1785 u64 newsize; 1786 struct ocfs2_super *osb = NULL; 1787 struct inode *inode = NULL; 1788 struct super_block *sb; 1789 struct buffer_head *new_fe_bh = NULL; 1790 struct buffer_head *parent_fe_bh = NULL; 1791 struct ocfs2_dinode *fe = NULL; 1792 struct ocfs2_dinode *dirfe; 1793 handle_t *handle = NULL; 1794 struct ocfs2_alloc_context *inode_ac = NULL; 1795 struct ocfs2_alloc_context *data_ac = NULL; 1796 struct ocfs2_alloc_context *xattr_ac = NULL; 1797 int want_clusters = 0; 1798 int xattr_credits = 0; 1799 struct ocfs2_security_xattr_info si = { 1800 .enable = 1, 1801 }; 1802 int did_quota = 0, did_quota_inode = 0; 1803 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1804 sigset_t oldset; 1805 int did_block_signals = 0; 1806 struct ocfs2_dentry_lock *dl = NULL; 1807 1808 trace_ocfs2_symlink_begin(dir, dentry, symname, 1809 dentry->d_name.len, dentry->d_name.name); 1810 1811 status = dquot_initialize(dir); 1812 if (status) { 1813 mlog_errno(status); 1814 goto bail; 1815 } 1816 1817 sb = dir->i_sb; 1818 osb = OCFS2_SB(sb); 1819 1820 l = strlen(symname) + 1; 1821 1822 credits = ocfs2_calc_symlink_credits(sb); 1823 1824 /* lock the parent directory */ 1825 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1826 if (status < 0) { 1827 if (status != -ENOENT) 1828 mlog_errno(status); 1829 return status; 1830 } 1831 1832 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1833 if (!ocfs2_read_links_count(dirfe)) { 1834 /* can't make a file in a deleted directory. */ 1835 status = -ENOENT; 1836 goto bail; 1837 } 1838 1839 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1840 dentry->d_name.len); 1841 if (status) 1842 goto bail; 1843 1844 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1845 dentry->d_name.name, 1846 dentry->d_name.len, &lookup); 1847 if (status < 0) { 1848 mlog_errno(status); 1849 goto bail; 1850 } 1851 1852 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1853 if (status < 0) { 1854 if (status != -ENOSPC) 1855 mlog_errno(status); 1856 goto bail; 1857 } 1858 1859 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1860 if (IS_ERR(inode)) { 1861 status = PTR_ERR(inode); 1862 inode = NULL; 1863 mlog_errno(status); 1864 goto bail; 1865 } 1866 1867 /* get security xattr */ 1868 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1869 if (status) { 1870 if (status == -EOPNOTSUPP) 1871 si.enable = 0; 1872 else { 1873 mlog_errno(status); 1874 goto bail; 1875 } 1876 } 1877 1878 /* calculate meta data/clusters for setting security xattr */ 1879 if (si.enable) { 1880 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1881 &xattr_credits, &xattr_ac); 1882 if (status < 0) { 1883 mlog_errno(status); 1884 goto bail; 1885 } 1886 } 1887 1888 /* don't reserve bitmap space for fast symlinks. */ 1889 if (l > ocfs2_fast_symlink_chars(sb)) 1890 want_clusters += 1; 1891 1892 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1893 if (status < 0) { 1894 if (status != -ENOSPC) 1895 mlog_errno(status); 1896 goto bail; 1897 } 1898 1899 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1900 if (IS_ERR(handle)) { 1901 status = PTR_ERR(handle); 1902 handle = NULL; 1903 mlog_errno(status); 1904 goto bail; 1905 } 1906 1907 /* Starting to change things, restart is no longer possible. */ 1908 ocfs2_block_signals(&oldset); 1909 did_block_signals = 1; 1910 1911 status = dquot_alloc_inode(inode); 1912 if (status) 1913 goto bail; 1914 did_quota_inode = 1; 1915 1916 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1917 dentry->d_name.name, 1918 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1919 inode->i_mode); 1920 1921 status = ocfs2_mknod_locked(osb, dir, inode, 1922 0, &new_fe_bh, parent_fe_bh, handle, 1923 inode_ac); 1924 if (status < 0) { 1925 mlog_errno(status); 1926 goto bail; 1927 } 1928 1929 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1930 inode->i_rdev = 0; 1931 newsize = l - 1; 1932 inode->i_op = &ocfs2_symlink_inode_operations; 1933 inode_nohighmem(inode); 1934 if (l > ocfs2_fast_symlink_chars(sb)) { 1935 u32 offset = 0; 1936 1937 status = dquot_alloc_space_nodirty(inode, 1938 ocfs2_clusters_to_bytes(osb->sb, 1)); 1939 if (status) 1940 goto bail; 1941 did_quota = 1; 1942 inode->i_mapping->a_ops = &ocfs2_aops; 1943 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1944 new_fe_bh, 1945 handle, data_ac, NULL, 1946 NULL); 1947 if (status < 0) { 1948 if (status != -ENOSPC && status != -EINTR) { 1949 mlog(ML_ERROR, 1950 "Failed to extend file to %llu\n", 1951 (unsigned long long)newsize); 1952 mlog_errno(status); 1953 status = -ENOSPC; 1954 } 1955 goto bail; 1956 } 1957 i_size_write(inode, newsize); 1958 inode->i_blocks = ocfs2_inode_sector_count(inode); 1959 } else { 1960 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1961 memcpy((char *) fe->id2.i_symlink, symname, l); 1962 i_size_write(inode, newsize); 1963 inode->i_blocks = 0; 1964 } 1965 1966 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1967 if (status < 0) { 1968 mlog_errno(status); 1969 goto bail; 1970 } 1971 1972 if (!ocfs2_inode_is_fast_symlink(inode)) { 1973 status = ocfs2_create_symlink_data(osb, handle, inode, 1974 symname); 1975 if (status < 0) { 1976 mlog_errno(status); 1977 goto bail; 1978 } 1979 } 1980 1981 if (si.enable) { 1982 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 1983 xattr_ac, data_ac); 1984 if (status < 0) { 1985 mlog_errno(status); 1986 goto bail; 1987 } 1988 } 1989 1990 /* 1991 * Do this before adding the entry to the directory. We add 1992 * also set d_op after success so that ->d_iput() will cleanup 1993 * the dentry lock even if ocfs2_add_entry() fails below. 1994 */ 1995 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 1996 if (status) { 1997 mlog_errno(status); 1998 goto bail; 1999 } 2000 2001 dl = dentry->d_fsdata; 2002 2003 status = ocfs2_add_entry(handle, dentry, inode, 2004 le64_to_cpu(fe->i_blkno), parent_fe_bh, 2005 &lookup); 2006 if (status < 0) { 2007 mlog_errno(status); 2008 goto bail; 2009 } 2010 2011 insert_inode_hash(inode); 2012 d_instantiate(dentry, inode); 2013 bail: 2014 if (status < 0 && did_quota) 2015 dquot_free_space_nodirty(inode, 2016 ocfs2_clusters_to_bytes(osb->sb, 1)); 2017 if (status < 0 && did_quota_inode) 2018 dquot_free_inode(inode); 2019 if (handle) 2020 ocfs2_commit_trans(osb, handle); 2021 2022 ocfs2_inode_unlock(dir, 1); 2023 if (did_block_signals) 2024 ocfs2_unblock_signals(&oldset); 2025 2026 brelse(new_fe_bh); 2027 brelse(parent_fe_bh); 2028 kfree(si.value); 2029 ocfs2_free_dir_lookup_result(&lookup); 2030 if (inode_ac) 2031 ocfs2_free_alloc_context(inode_ac); 2032 if (data_ac) 2033 ocfs2_free_alloc_context(data_ac); 2034 if (xattr_ac) 2035 ocfs2_free_alloc_context(xattr_ac); 2036 if ((status < 0) && inode) { 2037 if (dl) 2038 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 2039 2040 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 2041 clear_nlink(inode); 2042 iput(inode); 2043 } 2044 2045 if (status) 2046 mlog_errno(status); 2047 2048 return status; 2049 } 2050 2051 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2052 { 2053 int status, namelen; 2054 2055 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2056 (long long)blkno); 2057 if (namelen <= 0) { 2058 if (namelen) 2059 status = namelen; 2060 else 2061 status = -EINVAL; 2062 mlog_errno(status); 2063 goto bail; 2064 } 2065 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2066 status = -EINVAL; 2067 mlog_errno(status); 2068 goto bail; 2069 } 2070 2071 trace_ocfs2_blkno_stringify(blkno, name, namelen); 2072 2073 status = 0; 2074 bail: 2075 if (status < 0) 2076 mlog_errno(status); 2077 return status; 2078 } 2079 2080 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, 2081 struct inode **ret_orphan_dir, 2082 struct buffer_head **ret_orphan_dir_bh) 2083 { 2084 struct inode *orphan_dir_inode; 2085 struct buffer_head *orphan_dir_bh = NULL; 2086 int ret = 0; 2087 2088 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2089 ORPHAN_DIR_SYSTEM_INODE, 2090 osb->slot_num); 2091 if (!orphan_dir_inode) { 2092 ret = -ENOENT; 2093 mlog_errno(ret); 2094 return ret; 2095 } 2096 2097 inode_lock(orphan_dir_inode); 2098 2099 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2100 if (ret < 0) { 2101 inode_unlock(orphan_dir_inode); 2102 iput(orphan_dir_inode); 2103 2104 mlog_errno(ret); 2105 return ret; 2106 } 2107 2108 *ret_orphan_dir = orphan_dir_inode; 2109 *ret_orphan_dir_bh = orphan_dir_bh; 2110 2111 return 0; 2112 } 2113 2114 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, 2115 struct buffer_head *orphan_dir_bh, 2116 u64 blkno, 2117 char *name, 2118 struct ocfs2_dir_lookup_result *lookup, 2119 bool dio) 2120 { 2121 int ret; 2122 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); 2123 int namelen = dio ? 2124 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2125 OCFS2_ORPHAN_NAMELEN; 2126 2127 if (dio) { 2128 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2129 OCFS2_DIO_ORPHAN_PREFIX); 2130 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2131 ret = -EINVAL; 2132 mlog_errno(ret); 2133 return ret; 2134 } 2135 2136 ret = ocfs2_blkno_stringify(blkno, 2137 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2138 } else 2139 ret = ocfs2_blkno_stringify(blkno, name); 2140 if (ret < 0) { 2141 mlog_errno(ret); 2142 return ret; 2143 } 2144 2145 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2146 orphan_dir_bh, name, 2147 namelen, lookup); 2148 if (ret < 0) { 2149 mlog_errno(ret); 2150 return ret; 2151 } 2152 2153 return 0; 2154 } 2155 2156 /** 2157 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for 2158 * insertion of an orphan. 2159 * @osb: ocfs2 file system 2160 * @ret_orphan_dir: Orphan dir inode - returned locked! 2161 * @blkno: Actual block number of the inode to be inserted into orphan dir. 2162 * @lookup: dir lookup result, to be passed back into functions like 2163 * ocfs2_orphan_add 2164 * 2165 * Returns zero on success and the ret_orphan_dir, name and lookup 2166 * fields will be populated. 2167 * 2168 * Returns non-zero on failure. 2169 */ 2170 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2171 struct inode **ret_orphan_dir, 2172 u64 blkno, 2173 char *name, 2174 struct ocfs2_dir_lookup_result *lookup, 2175 bool dio) 2176 { 2177 struct inode *orphan_dir_inode = NULL; 2178 struct buffer_head *orphan_dir_bh = NULL; 2179 int ret = 0; 2180 2181 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, 2182 &orphan_dir_bh); 2183 if (ret < 0) { 2184 mlog_errno(ret); 2185 return ret; 2186 } 2187 2188 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, 2189 blkno, name, lookup, dio); 2190 if (ret < 0) { 2191 mlog_errno(ret); 2192 goto out; 2193 } 2194 2195 *ret_orphan_dir = orphan_dir_inode; 2196 2197 out: 2198 brelse(orphan_dir_bh); 2199 2200 if (ret) { 2201 ocfs2_inode_unlock(orphan_dir_inode, 1); 2202 inode_unlock(orphan_dir_inode); 2203 iput(orphan_dir_inode); 2204 } 2205 2206 if (ret) 2207 mlog_errno(ret); 2208 return ret; 2209 } 2210 2211 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2212 handle_t *handle, 2213 struct inode *inode, 2214 struct buffer_head *fe_bh, 2215 char *name, 2216 struct ocfs2_dir_lookup_result *lookup, 2217 struct inode *orphan_dir_inode, 2218 bool dio) 2219 { 2220 struct buffer_head *orphan_dir_bh = NULL; 2221 int status = 0; 2222 struct ocfs2_dinode *orphan_fe; 2223 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 2224 int namelen = dio ? 2225 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2226 OCFS2_ORPHAN_NAMELEN; 2227 2228 trace_ocfs2_orphan_add_begin( 2229 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2230 2231 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 2232 if (status < 0) { 2233 mlog_errno(status); 2234 goto leave; 2235 } 2236 2237 status = ocfs2_journal_access_di(handle, 2238 INODE_CACHE(orphan_dir_inode), 2239 orphan_dir_bh, 2240 OCFS2_JOURNAL_ACCESS_WRITE); 2241 if (status < 0) { 2242 mlog_errno(status); 2243 goto leave; 2244 } 2245 2246 /* 2247 * We're going to journal the change of i_flags and i_orphaned_slot. 2248 * It's safe anyway, though some callers may duplicate the journaling. 2249 * Journaling within the func just make the logic look more 2250 * straightforward. 2251 */ 2252 status = ocfs2_journal_access_di(handle, 2253 INODE_CACHE(inode), 2254 fe_bh, 2255 OCFS2_JOURNAL_ACCESS_WRITE); 2256 if (status < 0) { 2257 mlog_errno(status); 2258 goto leave; 2259 } 2260 2261 /* we're a cluster, and nlink can change on disk from 2262 * underneath us... */ 2263 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2264 if (S_ISDIR(inode->i_mode)) 2265 ocfs2_add_links_count(orphan_fe, 1); 2266 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2267 ocfs2_journal_dirty(handle, orphan_dir_bh); 2268 2269 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2270 namelen, inode, 2271 OCFS2_I(inode)->ip_blkno, 2272 orphan_dir_bh, lookup); 2273 if (status < 0) { 2274 mlog_errno(status); 2275 goto rollback; 2276 } 2277 2278 if (dio) { 2279 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan 2280 * slot. 2281 */ 2282 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2283 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); 2284 } else { 2285 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL); 2286 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; 2287 2288 /* Record which orphan dir our inode now resides 2289 * in. delete_inode will use this to determine which orphan 2290 * dir to lock. */ 2291 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2292 } 2293 2294 ocfs2_journal_dirty(handle, fe_bh); 2295 2296 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, 2297 osb->slot_num); 2298 2299 rollback: 2300 if (status < 0) { 2301 if (S_ISDIR(inode->i_mode)) 2302 ocfs2_add_links_count(orphan_fe, -1); 2303 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2304 } 2305 2306 leave: 2307 brelse(orphan_dir_bh); 2308 2309 return status; 2310 } 2311 2312 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2313 int ocfs2_orphan_del(struct ocfs2_super *osb, 2314 handle_t *handle, 2315 struct inode *orphan_dir_inode, 2316 struct inode *inode, 2317 struct buffer_head *orphan_dir_bh, 2318 bool dio) 2319 { 2320 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2321 struct ocfs2_dinode *orphan_fe; 2322 int status = 0; 2323 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2324 2325 if (dio) { 2326 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2327 OCFS2_DIO_ORPHAN_PREFIX); 2328 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2329 status = -EINVAL; 2330 mlog_errno(status); 2331 return status; 2332 } 2333 2334 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, 2335 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2336 } else 2337 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2338 if (status < 0) { 2339 mlog_errno(status); 2340 goto leave; 2341 } 2342 2343 trace_ocfs2_orphan_del( 2344 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2345 name, strlen(name)); 2346 2347 status = ocfs2_journal_access_di(handle, 2348 INODE_CACHE(orphan_dir_inode), 2349 orphan_dir_bh, 2350 OCFS2_JOURNAL_ACCESS_WRITE); 2351 if (status < 0) { 2352 mlog_errno(status); 2353 goto leave; 2354 } 2355 2356 /* find it's spot in the orphan directory */ 2357 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode, 2358 &lookup); 2359 if (status) { 2360 mlog_errno(status); 2361 goto leave; 2362 } 2363 2364 /* remove it from the orphan directory */ 2365 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); 2366 if (status < 0) { 2367 mlog_errno(status); 2368 goto leave; 2369 } 2370 2371 /* do the i_nlink dance! :) */ 2372 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2373 if (S_ISDIR(inode->i_mode)) 2374 ocfs2_add_links_count(orphan_fe, -1); 2375 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2376 ocfs2_journal_dirty(handle, orphan_dir_bh); 2377 2378 leave: 2379 ocfs2_free_dir_lookup_result(&lookup); 2380 2381 if (status) 2382 mlog_errno(status); 2383 return status; 2384 } 2385 2386 /** 2387 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly 2388 * allocated file. This is different from the typical 'add to orphan dir' 2389 * operation in that the inode does not yet exist. This is a problem because 2390 * the orphan dir stringifies the inode block number to come up with it's 2391 * dirent. Obviously if the inode does not yet exist we have a chicken and egg 2392 * problem. This function works around it by calling deeper into the orphan 2393 * and suballoc code than other callers. Use this only by necessity. 2394 * @dir: The directory which this inode will ultimately wind up under - not the 2395 * orphan dir! 2396 * @dir_bh: buffer_head the @dir inode block 2397 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled 2398 * with the string to be used for orphan dirent. Pass back to the orphan dir 2399 * code. 2400 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan 2401 * dir code. 2402 * @ret_di_blkno: block number where the new inode will be allocated. 2403 * @orphan_insert: Dir insert context to be passed back into orphan dir code. 2404 * @ret_inode_ac: Inode alloc context to be passed back to the allocator. 2405 * 2406 * Returns zero on success and the ret_orphan_dir, name and lookup 2407 * fields will be populated. 2408 * 2409 * Returns non-zero on failure. 2410 */ 2411 static int ocfs2_prep_new_orphaned_file(struct inode *dir, 2412 struct buffer_head *dir_bh, 2413 char *orphan_name, 2414 struct inode **ret_orphan_dir, 2415 u64 *ret_di_blkno, 2416 struct ocfs2_dir_lookup_result *orphan_insert, 2417 struct ocfs2_alloc_context **ret_inode_ac) 2418 { 2419 int ret; 2420 u64 di_blkno; 2421 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2422 struct inode *orphan_dir = NULL; 2423 struct buffer_head *orphan_dir_bh = NULL; 2424 struct ocfs2_alloc_context *inode_ac = NULL; 2425 2426 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); 2427 if (ret < 0) { 2428 mlog_errno(ret); 2429 return ret; 2430 } 2431 2432 /* reserve an inode spot */ 2433 ret = ocfs2_reserve_new_inode(osb, &inode_ac); 2434 if (ret < 0) { 2435 if (ret != -ENOSPC) 2436 mlog_errno(ret); 2437 goto out; 2438 } 2439 2440 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, 2441 &di_blkno); 2442 if (ret) { 2443 mlog_errno(ret); 2444 goto out; 2445 } 2446 2447 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, 2448 di_blkno, orphan_name, orphan_insert, 2449 false); 2450 if (ret < 0) { 2451 mlog_errno(ret); 2452 goto out; 2453 } 2454 2455 out: 2456 if (ret == 0) { 2457 *ret_orphan_dir = orphan_dir; 2458 *ret_di_blkno = di_blkno; 2459 *ret_inode_ac = inode_ac; 2460 /* 2461 * orphan_name and orphan_insert are already up to 2462 * date via prepare_orphan_dir 2463 */ 2464 } else { 2465 /* Unroll reserve_new_inode* */ 2466 if (inode_ac) 2467 ocfs2_free_alloc_context(inode_ac); 2468 2469 /* Unroll orphan dir locking */ 2470 inode_unlock(orphan_dir); 2471 ocfs2_inode_unlock(orphan_dir, 1); 2472 iput(orphan_dir); 2473 } 2474 2475 brelse(orphan_dir_bh); 2476 2477 return ret; 2478 } 2479 2480 int ocfs2_create_inode_in_orphan(struct inode *dir, 2481 int mode, 2482 struct inode **new_inode) 2483 { 2484 int status, did_quota_inode = 0; 2485 struct inode *inode = NULL; 2486 struct inode *orphan_dir = NULL; 2487 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2488 handle_t *handle = NULL; 2489 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2490 struct buffer_head *parent_di_bh = NULL; 2491 struct buffer_head *new_di_bh = NULL; 2492 struct ocfs2_alloc_context *inode_ac = NULL; 2493 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2494 u64 uninitialized_var(di_blkno), suballoc_loc; 2495 u16 suballoc_bit; 2496 2497 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2498 if (status < 0) { 2499 if (status != -ENOENT) 2500 mlog_errno(status); 2501 return status; 2502 } 2503 2504 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, 2505 orphan_name, &orphan_dir, 2506 &di_blkno, &orphan_insert, &inode_ac); 2507 if (status < 0) { 2508 if (status != -ENOSPC) 2509 mlog_errno(status); 2510 goto leave; 2511 } 2512 2513 inode = ocfs2_get_init_inode(dir, mode); 2514 if (IS_ERR(inode)) { 2515 status = PTR_ERR(inode); 2516 inode = NULL; 2517 mlog_errno(status); 2518 goto leave; 2519 } 2520 2521 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2522 if (IS_ERR(handle)) { 2523 status = PTR_ERR(handle); 2524 handle = NULL; 2525 mlog_errno(status); 2526 goto leave; 2527 } 2528 2529 status = dquot_alloc_inode(inode); 2530 if (status) 2531 goto leave; 2532 did_quota_inode = 1; 2533 2534 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, 2535 &suballoc_loc, 2536 &suballoc_bit, di_blkno); 2537 if (status < 0) { 2538 mlog_errno(status); 2539 goto leave; 2540 } 2541 2542 clear_nlink(inode); 2543 /* do the real work now. */ 2544 status = __ocfs2_mknod_locked(dir, inode, 2545 0, &new_di_bh, parent_di_bh, handle, 2546 inode_ac, di_blkno, suballoc_loc, 2547 suballoc_bit); 2548 if (status < 0) { 2549 mlog_errno(status); 2550 goto leave; 2551 } 2552 2553 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, 2554 &orphan_insert, orphan_dir, false); 2555 if (status < 0) { 2556 mlog_errno(status); 2557 goto leave; 2558 } 2559 2560 /* get open lock so that only nodes can't remove it from orphan dir. */ 2561 status = ocfs2_open_lock(inode); 2562 if (status < 0) 2563 mlog_errno(status); 2564 2565 insert_inode_hash(inode); 2566 leave: 2567 if (status < 0 && did_quota_inode) 2568 dquot_free_inode(inode); 2569 if (handle) 2570 ocfs2_commit_trans(osb, handle); 2571 2572 if (orphan_dir) { 2573 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2574 ocfs2_inode_unlock(orphan_dir, 1); 2575 inode_unlock(orphan_dir); 2576 iput(orphan_dir); 2577 } 2578 2579 if ((status < 0) && inode) { 2580 clear_nlink(inode); 2581 iput(inode); 2582 } 2583 2584 if (inode_ac) 2585 ocfs2_free_alloc_context(inode_ac); 2586 2587 brelse(new_di_bh); 2588 2589 if (!status) 2590 *new_inode = inode; 2591 2592 ocfs2_free_dir_lookup_result(&orphan_insert); 2593 2594 ocfs2_inode_unlock(dir, 1); 2595 brelse(parent_di_bh); 2596 return status; 2597 } 2598 2599 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, 2600 struct inode *inode) 2601 { 2602 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2603 struct inode *orphan_dir_inode = NULL; 2604 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2605 struct buffer_head *di_bh = NULL; 2606 int status = 0; 2607 handle_t *handle = NULL; 2608 struct ocfs2_dinode *di = NULL; 2609 2610 status = ocfs2_inode_lock(inode, &di_bh, 1); 2611 if (status < 0) { 2612 mlog_errno(status); 2613 goto bail; 2614 } 2615 2616 di = (struct ocfs2_dinode *) di_bh->b_data; 2617 /* 2618 * Another append dio crashed? 2619 * If so, manually recover it first. 2620 */ 2621 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 2622 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode)); 2623 if (status < 0) { 2624 if (status != -ENOSPC) 2625 mlog_errno(status); 2626 goto bail_unlock_inode; 2627 } 2628 2629 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0); 2630 if (status < 0) { 2631 mlog_errno(status); 2632 goto bail_unlock_inode; 2633 } 2634 } 2635 2636 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, 2637 OCFS2_I(inode)->ip_blkno, 2638 orphan_name, 2639 &orphan_insert, 2640 true); 2641 if (status < 0) { 2642 mlog_errno(status); 2643 goto bail_unlock_inode; 2644 } 2645 2646 handle = ocfs2_start_trans(osb, 2647 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); 2648 if (IS_ERR(handle)) { 2649 status = PTR_ERR(handle); 2650 goto bail_unlock_orphan; 2651 } 2652 2653 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, 2654 &orphan_insert, orphan_dir_inode, true); 2655 if (status) 2656 mlog_errno(status); 2657 2658 ocfs2_commit_trans(osb, handle); 2659 2660 bail_unlock_orphan: 2661 ocfs2_inode_unlock(orphan_dir_inode, 1); 2662 inode_unlock(orphan_dir_inode); 2663 iput(orphan_dir_inode); 2664 2665 ocfs2_free_dir_lookup_result(&orphan_insert); 2666 2667 bail_unlock_inode: 2668 ocfs2_inode_unlock(inode, 1); 2669 brelse(di_bh); 2670 2671 bail: 2672 return status; 2673 } 2674 2675 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, 2676 struct inode *inode, struct buffer_head *di_bh, 2677 int update_isize, loff_t end) 2678 { 2679 struct inode *orphan_dir_inode = NULL; 2680 struct buffer_head *orphan_dir_bh = NULL; 2681 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2682 handle_t *handle = NULL; 2683 int status = 0; 2684 2685 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2686 ORPHAN_DIR_SYSTEM_INODE, 2687 le16_to_cpu(di->i_dio_orphaned_slot)); 2688 if (!orphan_dir_inode) { 2689 status = -ENOENT; 2690 mlog_errno(status); 2691 goto bail; 2692 } 2693 2694 inode_lock(orphan_dir_inode); 2695 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2696 if (status < 0) { 2697 inode_unlock(orphan_dir_inode); 2698 iput(orphan_dir_inode); 2699 mlog_errno(status); 2700 goto bail; 2701 } 2702 2703 handle = ocfs2_start_trans(osb, 2704 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); 2705 if (IS_ERR(handle)) { 2706 status = PTR_ERR(handle); 2707 goto bail_unlock_orphan; 2708 } 2709 2710 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); 2711 2712 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, 2713 inode, orphan_dir_bh, true); 2714 if (status < 0) { 2715 mlog_errno(status); 2716 goto bail_commit; 2717 } 2718 2719 status = ocfs2_journal_access_di(handle, 2720 INODE_CACHE(inode), 2721 di_bh, 2722 OCFS2_JOURNAL_ACCESS_WRITE); 2723 if (status < 0) { 2724 mlog_errno(status); 2725 goto bail_commit; 2726 } 2727 2728 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2729 di->i_dio_orphaned_slot = 0; 2730 2731 if (update_isize) { 2732 status = ocfs2_set_inode_size(handle, inode, di_bh, end); 2733 if (status) 2734 mlog_errno(status); 2735 } else 2736 ocfs2_journal_dirty(handle, di_bh); 2737 2738 bail_commit: 2739 ocfs2_commit_trans(osb, handle); 2740 2741 bail_unlock_orphan: 2742 ocfs2_inode_unlock(orphan_dir_inode, 1); 2743 inode_unlock(orphan_dir_inode); 2744 brelse(orphan_dir_bh); 2745 iput(orphan_dir_inode); 2746 2747 bail: 2748 return status; 2749 } 2750 2751 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2752 struct inode *inode, 2753 struct dentry *dentry) 2754 { 2755 int status = 0; 2756 struct buffer_head *parent_di_bh = NULL; 2757 handle_t *handle = NULL; 2758 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2759 struct ocfs2_dinode *dir_di, *di; 2760 struct inode *orphan_dir_inode = NULL; 2761 struct buffer_head *orphan_dir_bh = NULL; 2762 struct buffer_head *di_bh = NULL; 2763 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2764 2765 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, 2766 dentry->d_name.len, dentry->d_name.name, 2767 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2768 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2769 2770 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2771 if (status < 0) { 2772 if (status != -ENOENT) 2773 mlog_errno(status); 2774 return status; 2775 } 2776 2777 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2778 if (!dir_di->i_links_count) { 2779 /* can't make a file in a deleted directory. */ 2780 status = -ENOENT; 2781 goto leave; 2782 } 2783 2784 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2785 dentry->d_name.len); 2786 if (status) 2787 goto leave; 2788 2789 /* get a spot inside the dir. */ 2790 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2791 dentry->d_name.name, 2792 dentry->d_name.len, &lookup); 2793 if (status < 0) { 2794 mlog_errno(status); 2795 goto leave; 2796 } 2797 2798 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2799 ORPHAN_DIR_SYSTEM_INODE, 2800 osb->slot_num); 2801 if (!orphan_dir_inode) { 2802 status = -ENOENT; 2803 mlog_errno(status); 2804 goto leave; 2805 } 2806 2807 inode_lock(orphan_dir_inode); 2808 2809 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2810 if (status < 0) { 2811 mlog_errno(status); 2812 inode_unlock(orphan_dir_inode); 2813 iput(orphan_dir_inode); 2814 goto leave; 2815 } 2816 2817 status = ocfs2_read_inode_block(inode, &di_bh); 2818 if (status < 0) { 2819 mlog_errno(status); 2820 goto orphan_unlock; 2821 } 2822 2823 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2824 if (IS_ERR(handle)) { 2825 status = PTR_ERR(handle); 2826 handle = NULL; 2827 mlog_errno(status); 2828 goto orphan_unlock; 2829 } 2830 2831 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2832 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2833 if (status < 0) { 2834 mlog_errno(status); 2835 goto out_commit; 2836 } 2837 2838 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2839 orphan_dir_bh, false); 2840 if (status < 0) { 2841 mlog_errno(status); 2842 goto out_commit; 2843 } 2844 2845 di = (struct ocfs2_dinode *)di_bh->b_data; 2846 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); 2847 di->i_orphaned_slot = 0; 2848 set_nlink(inode, 1); 2849 ocfs2_set_links_count(di, inode->i_nlink); 2850 ocfs2_update_inode_fsync_trans(handle, inode, 1); 2851 ocfs2_journal_dirty(handle, di_bh); 2852 2853 status = ocfs2_add_entry(handle, dentry, inode, 2854 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2855 &lookup); 2856 if (status < 0) { 2857 mlog_errno(status); 2858 goto out_commit; 2859 } 2860 2861 status = ocfs2_dentry_attach_lock(dentry, inode, 2862 OCFS2_I(dir)->ip_blkno); 2863 if (status) { 2864 mlog_errno(status); 2865 goto out_commit; 2866 } 2867 2868 d_instantiate(dentry, inode); 2869 status = 0; 2870 out_commit: 2871 ocfs2_commit_trans(osb, handle); 2872 orphan_unlock: 2873 ocfs2_inode_unlock(orphan_dir_inode, 1); 2874 inode_unlock(orphan_dir_inode); 2875 iput(orphan_dir_inode); 2876 leave: 2877 2878 ocfs2_inode_unlock(dir, 1); 2879 2880 brelse(di_bh); 2881 brelse(parent_di_bh); 2882 brelse(orphan_dir_bh); 2883 2884 ocfs2_free_dir_lookup_result(&lookup); 2885 2886 if (status) 2887 mlog_errno(status); 2888 2889 return status; 2890 } 2891 2892 const struct inode_operations ocfs2_dir_iops = { 2893 .create = ocfs2_create, 2894 .lookup = ocfs2_lookup, 2895 .link = ocfs2_link, 2896 .unlink = ocfs2_unlink, 2897 .rmdir = ocfs2_unlink, 2898 .symlink = ocfs2_symlink, 2899 .mkdir = ocfs2_mkdir, 2900 .mknod = ocfs2_mknod, 2901 .rename = ocfs2_rename, 2902 .setattr = ocfs2_setattr, 2903 .getattr = ocfs2_getattr, 2904 .permission = ocfs2_permission, 2905 .listxattr = ocfs2_listxattr, 2906 .fiemap = ocfs2_fiemap, 2907 .get_acl = ocfs2_iop_get_acl, 2908 .set_acl = ocfs2_iop_set_acl, 2909 }; 2910