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 #include "ioctl.h" 54 55 #include "buffer_head_io.h" 56 57 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 58 struct inode *dir, 59 struct inode *inode, 60 dev_t dev, 61 struct buffer_head **new_fe_bh, 62 struct buffer_head *parent_fe_bh, 63 handle_t *handle, 64 struct ocfs2_alloc_context *inode_ac); 65 66 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 67 struct inode **ret_orphan_dir, 68 u64 blkno, 69 char *name, 70 struct ocfs2_dir_lookup_result *lookup, 71 bool dio); 72 73 static int ocfs2_orphan_add(struct ocfs2_super *osb, 74 handle_t *handle, 75 struct inode *inode, 76 struct buffer_head *fe_bh, 77 char *name, 78 struct ocfs2_dir_lookup_result *lookup, 79 struct inode *orphan_dir_inode, 80 bool dio); 81 82 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 83 handle_t *handle, 84 struct inode *inode, 85 const char *symname); 86 87 static int ocfs2_double_lock(struct ocfs2_super *osb, 88 struct buffer_head **bh1, 89 struct inode *inode1, 90 struct buffer_head **bh2, 91 struct inode *inode2, 92 int rename); 93 94 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2); 95 /* An orphan dir name is an 8 byte value, printed as a hex string */ 96 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64))) 97 98 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, 99 unsigned int flags) 100 { 101 int status; 102 u64 blkno; 103 struct inode *inode = NULL; 104 struct dentry *ret; 105 struct ocfs2_inode_info *oi; 106 107 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len, 108 dentry->d_name.name, 109 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0); 110 111 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { 112 ret = ERR_PTR(-ENAMETOOLONG); 113 goto bail; 114 } 115 116 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT); 117 if (status < 0) { 118 if (status != -ENOENT) 119 mlog_errno(status); 120 ret = ERR_PTR(status); 121 goto bail; 122 } 123 124 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name, 125 dentry->d_name.len, &blkno); 126 if (status < 0) 127 goto bail_add; 128 129 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0); 130 if (IS_ERR(inode)) { 131 ret = ERR_PTR(-EACCES); 132 goto bail_unlock; 133 } 134 135 oi = OCFS2_I(inode); 136 /* Clear any orphaned state... If we were able to look up the 137 * inode from a directory, it certainly can't be orphaned. We 138 * might have the bad state from a node which intended to 139 * orphan this inode but crashed before it could commit the 140 * unlink. */ 141 spin_lock(&oi->ip_lock); 142 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; 143 spin_unlock(&oi->ip_lock); 144 145 bail_add: 146 ret = d_splice_alias(inode, dentry); 147 148 if (inode) { 149 /* 150 * If d_splice_alias() finds a DCACHE_DISCONNECTED 151 * dentry, it will d_move() it on top of ourse. The 152 * return value will indicate this however, so in 153 * those cases, we switch them around for the locking 154 * code. 155 * 156 * NOTE: This dentry already has ->d_op set from 157 * ocfs2_get_parent() and ocfs2_get_dentry() 158 */ 159 if (!IS_ERR_OR_NULL(ret)) 160 dentry = ret; 161 162 status = ocfs2_dentry_attach_lock(dentry, inode, 163 OCFS2_I(dir)->ip_blkno); 164 if (status) { 165 mlog_errno(status); 166 ret = ERR_PTR(status); 167 goto bail_unlock; 168 } 169 } else 170 ocfs2_dentry_attach_gen(dentry); 171 172 bail_unlock: 173 /* Don't drop the cluster lock until *after* the d_add -- 174 * unlink on another node will message us to remove that 175 * dentry under this lock so otherwise we can race this with 176 * the downconvert thread and have a stale dentry. */ 177 ocfs2_inode_unlock(dir, 0); 178 179 bail: 180 181 trace_ocfs2_lookup_ret(ret); 182 183 return ret; 184 } 185 186 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode) 187 { 188 struct inode *inode; 189 int status; 190 191 inode = new_inode(dir->i_sb); 192 if (!inode) { 193 mlog(ML_ERROR, "new_inode failed!\n"); 194 return ERR_PTR(-ENOMEM); 195 } 196 197 /* populate as many fields early on as possible - many of 198 * these are used by the support functions here and in 199 * callers. */ 200 if (S_ISDIR(mode)) 201 set_nlink(inode, 2); 202 inode_init_owner(&init_user_ns, inode, dir, mode); 203 status = dquot_initialize(inode); 204 if (status) 205 return ERR_PTR(status); 206 207 return inode; 208 } 209 210 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb, 211 struct dentry *dentry, struct inode *inode) 212 { 213 struct ocfs2_dentry_lock *dl = dentry->d_fsdata; 214 215 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres); 216 ocfs2_lock_res_free(&dl->dl_lockres); 217 BUG_ON(dl->dl_count != 1); 218 spin_lock(&dentry_attach_lock); 219 dentry->d_fsdata = NULL; 220 spin_unlock(&dentry_attach_lock); 221 kfree(dl); 222 iput(inode); 223 } 224 225 static int ocfs2_mknod(struct user_namespace *mnt_userns, 226 struct inode *dir, 227 struct dentry *dentry, 228 umode_t mode, 229 dev_t dev) 230 { 231 int status = 0; 232 struct buffer_head *parent_fe_bh = NULL; 233 handle_t *handle = NULL; 234 struct ocfs2_super *osb; 235 struct ocfs2_dinode *dirfe; 236 struct buffer_head *new_fe_bh = NULL; 237 struct inode *inode = NULL; 238 struct ocfs2_alloc_context *inode_ac = NULL; 239 struct ocfs2_alloc_context *data_ac = NULL; 240 struct ocfs2_alloc_context *meta_ac = NULL; 241 int want_clusters = 0; 242 int want_meta = 0; 243 int xattr_credits = 0; 244 struct ocfs2_security_xattr_info si = { 245 .enable = 1, 246 }; 247 int did_quota_inode = 0; 248 struct ocfs2_dir_lookup_result lookup = { NULL, }; 249 sigset_t oldset; 250 int did_block_signals = 0; 251 struct ocfs2_dentry_lock *dl = NULL; 252 253 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name, 254 (unsigned long long)OCFS2_I(dir)->ip_blkno, 255 (unsigned long)dev, mode); 256 257 status = dquot_initialize(dir); 258 if (status) { 259 mlog_errno(status); 260 return status; 261 } 262 263 /* get our super block */ 264 osb = OCFS2_SB(dir->i_sb); 265 266 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 267 if (status < 0) { 268 if (status != -ENOENT) 269 mlog_errno(status); 270 return status; 271 } 272 273 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) { 274 status = -EMLINK; 275 goto leave; 276 } 277 278 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 279 if (!ocfs2_read_links_count(dirfe)) { 280 /* can't make a file in a deleted directory. */ 281 status = -ENOENT; 282 goto leave; 283 } 284 285 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 286 dentry->d_name.len); 287 if (status) 288 goto leave; 289 290 /* get a spot inside the dir. */ 291 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 292 dentry->d_name.name, 293 dentry->d_name.len, &lookup); 294 if (status < 0) { 295 mlog_errno(status); 296 goto leave; 297 } 298 299 /* reserve an inode spot */ 300 status = ocfs2_reserve_new_inode(osb, &inode_ac); 301 if (status < 0) { 302 if (status != -ENOSPC) 303 mlog_errno(status); 304 goto leave; 305 } 306 307 inode = ocfs2_get_init_inode(dir, mode); 308 if (IS_ERR(inode)) { 309 status = PTR_ERR(inode); 310 inode = NULL; 311 mlog_errno(status); 312 goto leave; 313 } 314 315 /* get security xattr */ 316 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 317 if (status) { 318 if (status == -EOPNOTSUPP) 319 si.enable = 0; 320 else { 321 mlog_errno(status); 322 goto leave; 323 } 324 } 325 326 /* calculate meta data/clusters for setting security and acl xattr */ 327 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode, 328 &si, &want_clusters, 329 &xattr_credits, &want_meta); 330 if (status < 0) { 331 mlog_errno(status); 332 goto leave; 333 } 334 335 /* Reserve a cluster if creating an extent based directory. */ 336 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { 337 want_clusters += 1; 338 339 /* Dir indexing requires extra space as well */ 340 if (ocfs2_supports_indexed_dirs(osb)) 341 want_meta++; 342 } 343 344 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac); 345 if (status < 0) { 346 if (status != -ENOSPC) 347 mlog_errno(status); 348 goto leave; 349 } 350 351 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 352 if (status < 0) { 353 if (status != -ENOSPC) 354 mlog_errno(status); 355 goto leave; 356 } 357 358 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 359 S_ISDIR(mode), 360 xattr_credits)); 361 if (IS_ERR(handle)) { 362 status = PTR_ERR(handle); 363 handle = NULL; 364 mlog_errno(status); 365 goto leave; 366 } 367 368 /* Starting to change things, restart is no longer possible. */ 369 ocfs2_block_signals(&oldset); 370 did_block_signals = 1; 371 372 status = dquot_alloc_inode(inode); 373 if (status) 374 goto leave; 375 did_quota_inode = 1; 376 377 /* do the real work now. */ 378 status = ocfs2_mknod_locked(osb, dir, inode, dev, 379 &new_fe_bh, parent_fe_bh, handle, 380 inode_ac); 381 if (status < 0) { 382 mlog_errno(status); 383 goto leave; 384 } 385 386 if (S_ISDIR(mode)) { 387 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 388 new_fe_bh, data_ac, meta_ac); 389 if (status < 0) { 390 mlog_errno(status); 391 goto leave; 392 } 393 394 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir), 395 parent_fe_bh, 396 OCFS2_JOURNAL_ACCESS_WRITE); 397 if (status < 0) { 398 mlog_errno(status); 399 goto leave; 400 } 401 ocfs2_add_links_count(dirfe, 1); 402 ocfs2_journal_dirty(handle, parent_fe_bh); 403 inc_nlink(dir); 404 } 405 406 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh, 407 meta_ac, data_ac); 408 409 if (status < 0) { 410 mlog_errno(status); 411 goto roll_back; 412 } 413 414 if (si.enable) { 415 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 416 meta_ac, data_ac); 417 if (status < 0) { 418 mlog_errno(status); 419 goto roll_back; 420 } 421 } 422 423 /* 424 * Do this before adding the entry to the directory. We add 425 * also set d_op after success so that ->d_iput() will cleanup 426 * the dentry lock even if ocfs2_add_entry() fails below. 427 */ 428 status = ocfs2_dentry_attach_lock(dentry, inode, 429 OCFS2_I(dir)->ip_blkno); 430 if (status) { 431 mlog_errno(status); 432 goto roll_back; 433 } 434 435 dl = dentry->d_fsdata; 436 437 status = ocfs2_add_entry(handle, dentry, inode, 438 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 439 &lookup); 440 if (status < 0) { 441 mlog_errno(status); 442 goto roll_back; 443 } 444 445 insert_inode_hash(inode); 446 d_instantiate(dentry, inode); 447 status = 0; 448 449 roll_back: 450 if (status < 0 && S_ISDIR(mode)) { 451 ocfs2_add_links_count(dirfe, -1); 452 drop_nlink(dir); 453 } 454 455 leave: 456 if (status < 0 && did_quota_inode) 457 dquot_free_inode(inode); 458 if (handle) 459 ocfs2_commit_trans(osb, handle); 460 461 ocfs2_inode_unlock(dir, 1); 462 if (did_block_signals) 463 ocfs2_unblock_signals(&oldset); 464 465 brelse(new_fe_bh); 466 brelse(parent_fe_bh); 467 kfree(si.value); 468 469 ocfs2_free_dir_lookup_result(&lookup); 470 471 if (inode_ac) 472 ocfs2_free_alloc_context(inode_ac); 473 474 if (data_ac) 475 ocfs2_free_alloc_context(data_ac); 476 477 if (meta_ac) 478 ocfs2_free_alloc_context(meta_ac); 479 480 /* 481 * We should call iput after the i_mutex of the bitmap been 482 * unlocked in ocfs2_free_alloc_context, or the 483 * ocfs2_delete_inode will mutex_lock again. 484 */ 485 if ((status < 0) && inode) { 486 if (dl) 487 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 488 489 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 490 clear_nlink(inode); 491 iput(inode); 492 } 493 494 if (status) 495 mlog_errno(status); 496 497 return status; 498 } 499 500 static int __ocfs2_mknod_locked(struct inode *dir, 501 struct inode *inode, 502 dev_t dev, 503 struct buffer_head **new_fe_bh, 504 struct buffer_head *parent_fe_bh, 505 handle_t *handle, 506 struct ocfs2_alloc_context *inode_ac, 507 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit) 508 { 509 int status = 0; 510 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 511 struct ocfs2_dinode *fe = NULL; 512 struct ocfs2_extent_list *fel; 513 u16 feat; 514 struct ocfs2_inode_info *oi = OCFS2_I(inode); 515 struct timespec64 ts; 516 517 *new_fe_bh = NULL; 518 519 /* populate as many fields early on as possible - many of 520 * these are used by the support functions here and in 521 * callers. */ 522 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 523 oi->ip_blkno = fe_blkno; 524 spin_lock(&osb->osb_lock); 525 inode->i_generation = osb->s_next_generation++; 526 spin_unlock(&osb->osb_lock); 527 528 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 529 if (!*new_fe_bh) { 530 status = -ENOMEM; 531 mlog_errno(status); 532 goto leave; 533 } 534 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh); 535 536 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 537 *new_fe_bh, 538 OCFS2_JOURNAL_ACCESS_CREATE); 539 if (status < 0) { 540 mlog_errno(status); 541 goto leave; 542 } 543 544 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 545 memset(fe, 0, osb->sb->s_blocksize); 546 547 fe->i_generation = cpu_to_le32(inode->i_generation); 548 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 549 fe->i_blkno = cpu_to_le64(fe_blkno); 550 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc); 551 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 552 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); 553 fe->i_uid = cpu_to_le32(i_uid_read(inode)); 554 fe->i_gid = cpu_to_le32(i_gid_read(inode)); 555 fe->i_mode = cpu_to_le16(inode->i_mode); 556 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 557 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 558 559 ocfs2_set_links_count(fe, inode->i_nlink); 560 561 fe->i_last_eb_blk = 0; 562 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 563 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL); 564 ktime_get_real_ts64(&ts); 565 fe->i_atime = fe->i_ctime = fe->i_mtime = 566 cpu_to_le64(ts.tv_sec); 567 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 568 cpu_to_le32(ts.tv_nsec); 569 fe->i_dtime = 0; 570 571 /* 572 * If supported, directories start with inline data. If inline 573 * isn't supported, but indexing is, we start them as indexed. 574 */ 575 feat = le16_to_cpu(fe->i_dyn_features); 576 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) { 577 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); 578 579 fe->id2.i_data.id_count = cpu_to_le16( 580 ocfs2_max_inline_data_with_xattr(osb->sb, fe)); 581 } else { 582 fel = &fe->id2.i_list; 583 fel->l_tree_depth = 0; 584 fel->l_next_free_rec = 0; 585 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 586 } 587 588 ocfs2_journal_dirty(handle, *new_fe_bh); 589 590 ocfs2_populate_inode(inode, fe, 1); 591 ocfs2_ci_set_new(osb, INODE_CACHE(inode)); 592 if (!ocfs2_mount_local(osb)) { 593 status = ocfs2_create_new_inode_locks(inode); 594 if (status < 0) 595 mlog_errno(status); 596 } 597 598 ocfs2_update_inode_fsync_trans(handle, inode, 1); 599 600 leave: 601 if (status < 0) { 602 if (*new_fe_bh) { 603 brelse(*new_fe_bh); 604 *new_fe_bh = NULL; 605 } 606 } 607 608 if (status) 609 mlog_errno(status); 610 return status; 611 } 612 613 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 614 struct inode *dir, 615 struct inode *inode, 616 dev_t dev, 617 struct buffer_head **new_fe_bh, 618 struct buffer_head *parent_fe_bh, 619 handle_t *handle, 620 struct ocfs2_alloc_context *inode_ac) 621 { 622 int status = 0; 623 u64 suballoc_loc, fe_blkno = 0; 624 u16 suballoc_bit; 625 626 *new_fe_bh = NULL; 627 628 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh, 629 inode_ac, &suballoc_loc, 630 &suballoc_bit, &fe_blkno); 631 if (status < 0) { 632 mlog_errno(status); 633 return status; 634 } 635 636 status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, 637 parent_fe_bh, handle, inode_ac, 638 fe_blkno, suballoc_loc, suballoc_bit); 639 if (status < 0) { 640 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit); 641 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode, 642 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1); 643 if (tmp) 644 mlog_errno(tmp); 645 } 646 647 return status; 648 } 649 650 static int ocfs2_mkdir(struct user_namespace *mnt_userns, 651 struct inode *dir, 652 struct dentry *dentry, 653 umode_t mode) 654 { 655 int ret; 656 657 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, 658 OCFS2_I(dir)->ip_blkno, mode); 659 ret = ocfs2_mknod(&init_user_ns, dir, dentry, mode | S_IFDIR, 0); 660 if (ret) 661 mlog_errno(ret); 662 663 return ret; 664 } 665 666 static int ocfs2_create(struct user_namespace *mnt_userns, 667 struct inode *dir, 668 struct dentry *dentry, 669 umode_t mode, 670 bool excl) 671 { 672 int ret; 673 674 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name, 675 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode); 676 ret = ocfs2_mknod(&init_user_ns, dir, dentry, mode | S_IFREG, 0); 677 if (ret) 678 mlog_errno(ret); 679 680 return ret; 681 } 682 683 static int ocfs2_link(struct dentry *old_dentry, 684 struct inode *dir, 685 struct dentry *dentry) 686 { 687 handle_t *handle; 688 struct inode *inode = d_inode(old_dentry); 689 struct inode *old_dir = d_inode(old_dentry->d_parent); 690 int err; 691 struct buffer_head *fe_bh = NULL; 692 struct buffer_head *old_dir_bh = NULL; 693 struct buffer_head *parent_fe_bh = NULL; 694 struct ocfs2_dinode *fe = NULL; 695 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 696 struct ocfs2_dir_lookup_result lookup = { NULL, }; 697 sigset_t oldset; 698 u64 old_de_ino; 699 700 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno, 701 old_dentry->d_name.len, old_dentry->d_name.name, 702 dentry->d_name.len, dentry->d_name.name); 703 704 if (S_ISDIR(inode->i_mode)) 705 return -EPERM; 706 707 err = dquot_initialize(dir); 708 if (err) { 709 mlog_errno(err); 710 return err; 711 } 712 713 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 714 &parent_fe_bh, dir, 0); 715 if (err < 0) { 716 if (err != -ENOENT) 717 mlog_errno(err); 718 return err; 719 } 720 721 /* make sure both dirs have bhs 722 * get an extra ref on old_dir_bh if old==new */ 723 if (!parent_fe_bh) { 724 if (old_dir_bh) { 725 parent_fe_bh = old_dir_bh; 726 get_bh(parent_fe_bh); 727 } else { 728 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str); 729 err = -EIO; 730 goto out; 731 } 732 } 733 734 if (!dir->i_nlink) { 735 err = -ENOENT; 736 goto out; 737 } 738 739 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 740 old_dentry->d_name.len, &old_de_ino); 741 if (err) { 742 err = -ENOENT; 743 goto out; 744 } 745 746 /* 747 * Check whether another node removed the source inode while we 748 * were in the vfs. 749 */ 750 if (old_de_ino != OCFS2_I(inode)->ip_blkno) { 751 err = -ENOENT; 752 goto out; 753 } 754 755 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 756 dentry->d_name.len); 757 if (err) 758 goto out; 759 760 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 761 dentry->d_name.name, 762 dentry->d_name.len, &lookup); 763 if (err < 0) { 764 mlog_errno(err); 765 goto out; 766 } 767 768 err = ocfs2_inode_lock(inode, &fe_bh, 1); 769 if (err < 0) { 770 if (err != -ENOENT) 771 mlog_errno(err); 772 goto out; 773 } 774 775 fe = (struct ocfs2_dinode *) fe_bh->b_data; 776 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { 777 err = -EMLINK; 778 goto out_unlock_inode; 779 } 780 781 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); 782 if (IS_ERR(handle)) { 783 err = PTR_ERR(handle); 784 handle = NULL; 785 mlog_errno(err); 786 goto out_unlock_inode; 787 } 788 789 /* Starting to change things, restart is no longer possible. */ 790 ocfs2_block_signals(&oldset); 791 792 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 793 OCFS2_JOURNAL_ACCESS_WRITE); 794 if (err < 0) { 795 mlog_errno(err); 796 goto out_commit; 797 } 798 799 inc_nlink(inode); 800 inode->i_ctime = current_time(inode); 801 ocfs2_set_links_count(fe, inode->i_nlink); 802 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 803 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 804 ocfs2_journal_dirty(handle, fe_bh); 805 806 err = ocfs2_add_entry(handle, dentry, inode, 807 OCFS2_I(inode)->ip_blkno, 808 parent_fe_bh, &lookup); 809 if (err) { 810 ocfs2_add_links_count(fe, -1); 811 drop_nlink(inode); 812 mlog_errno(err); 813 goto out_commit; 814 } 815 816 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 817 if (err) { 818 mlog_errno(err); 819 goto out_commit; 820 } 821 822 ihold(inode); 823 d_instantiate(dentry, inode); 824 825 out_commit: 826 ocfs2_commit_trans(osb, handle); 827 ocfs2_unblock_signals(&oldset); 828 out_unlock_inode: 829 ocfs2_inode_unlock(inode, 1); 830 831 out: 832 ocfs2_double_unlock(old_dir, dir); 833 834 brelse(fe_bh); 835 brelse(parent_fe_bh); 836 brelse(old_dir_bh); 837 838 ocfs2_free_dir_lookup_result(&lookup); 839 840 if (err) 841 mlog_errno(err); 842 843 return err; 844 } 845 846 /* 847 * Takes and drops an exclusive lock on the given dentry. This will 848 * force other nodes to drop it. 849 */ 850 static int ocfs2_remote_dentry_delete(struct dentry *dentry) 851 { 852 int ret; 853 854 ret = ocfs2_dentry_lock(dentry, 1); 855 if (ret) 856 mlog_errno(ret); 857 else 858 ocfs2_dentry_unlock(dentry, 1); 859 860 return ret; 861 } 862 863 static inline int ocfs2_inode_is_unlinkable(struct inode *inode) 864 { 865 if (S_ISDIR(inode->i_mode)) { 866 if (inode->i_nlink == 2) 867 return 1; 868 return 0; 869 } 870 871 if (inode->i_nlink == 1) 872 return 1; 873 return 0; 874 } 875 876 static int ocfs2_unlink(struct inode *dir, 877 struct dentry *dentry) 878 { 879 int status; 880 int child_locked = 0; 881 bool is_unlinkable = false; 882 struct inode *inode = d_inode(dentry); 883 struct inode *orphan_dir = NULL; 884 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 885 u64 blkno; 886 struct ocfs2_dinode *fe = NULL; 887 struct buffer_head *fe_bh = NULL; 888 struct buffer_head *parent_node_bh = NULL; 889 handle_t *handle = NULL; 890 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 891 struct ocfs2_dir_lookup_result lookup = { NULL, }; 892 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 893 894 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, 895 dentry->d_name.name, 896 (unsigned long long)OCFS2_I(dir)->ip_blkno, 897 (unsigned long long)OCFS2_I(inode)->ip_blkno); 898 899 status = dquot_initialize(dir); 900 if (status) { 901 mlog_errno(status); 902 return status; 903 } 904 905 BUG_ON(d_inode(dentry->d_parent) != dir); 906 907 if (inode == osb->root_inode) 908 return -EPERM; 909 910 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 911 OI_LS_PARENT); 912 if (status < 0) { 913 if (status != -ENOENT) 914 mlog_errno(status); 915 return status; 916 } 917 918 status = ocfs2_find_files_on_disk(dentry->d_name.name, 919 dentry->d_name.len, &blkno, dir, 920 &lookup); 921 if (status < 0) { 922 if (status != -ENOENT) 923 mlog_errno(status); 924 goto leave; 925 } 926 927 if (OCFS2_I(inode)->ip_blkno != blkno) { 928 status = -ENOENT; 929 930 trace_ocfs2_unlink_noent( 931 (unsigned long long)OCFS2_I(inode)->ip_blkno, 932 (unsigned long long)blkno, 933 OCFS2_I(inode)->ip_flags); 934 goto leave; 935 } 936 937 status = ocfs2_inode_lock(inode, &fe_bh, 1); 938 if (status < 0) { 939 if (status != -ENOENT) 940 mlog_errno(status); 941 goto leave; 942 } 943 child_locked = 1; 944 945 if (S_ISDIR(inode->i_mode)) { 946 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 947 status = -ENOTEMPTY; 948 goto leave; 949 } 950 } 951 952 status = ocfs2_remote_dentry_delete(dentry); 953 if (status < 0) { 954 /* This remote delete should succeed under all normal 955 * circumstances. */ 956 mlog_errno(status); 957 goto leave; 958 } 959 960 if (ocfs2_inode_is_unlinkable(inode)) { 961 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 962 OCFS2_I(inode)->ip_blkno, 963 orphan_name, &orphan_insert, 964 false); 965 if (status < 0) { 966 mlog_errno(status); 967 goto leave; 968 } 969 is_unlinkable = true; 970 } 971 972 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 973 if (IS_ERR(handle)) { 974 status = PTR_ERR(handle); 975 handle = NULL; 976 mlog_errno(status); 977 goto leave; 978 } 979 980 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 981 OCFS2_JOURNAL_ACCESS_WRITE); 982 if (status < 0) { 983 mlog_errno(status); 984 goto leave; 985 } 986 987 fe = (struct ocfs2_dinode *) fe_bh->b_data; 988 989 /* delete the name from the parent dir */ 990 status = ocfs2_delete_entry(handle, dir, &lookup); 991 if (status < 0) { 992 mlog_errno(status); 993 goto leave; 994 } 995 996 if (S_ISDIR(inode->i_mode)) 997 drop_nlink(inode); 998 drop_nlink(inode); 999 ocfs2_set_links_count(fe, inode->i_nlink); 1000 ocfs2_journal_dirty(handle, fe_bh); 1001 1002 dir->i_ctime = dir->i_mtime = current_time(dir); 1003 if (S_ISDIR(inode->i_mode)) 1004 drop_nlink(dir); 1005 1006 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 1007 if (status < 0) { 1008 mlog_errno(status); 1009 if (S_ISDIR(inode->i_mode)) 1010 inc_nlink(dir); 1011 goto leave; 1012 } 1013 1014 if (is_unlinkable) { 1015 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, 1016 orphan_name, &orphan_insert, orphan_dir, false); 1017 if (status < 0) 1018 mlog_errno(status); 1019 } 1020 1021 leave: 1022 if (handle) 1023 ocfs2_commit_trans(osb, handle); 1024 1025 if (orphan_dir) { 1026 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1027 ocfs2_inode_unlock(orphan_dir, 1); 1028 inode_unlock(orphan_dir); 1029 iput(orphan_dir); 1030 } 1031 1032 if (child_locked) 1033 ocfs2_inode_unlock(inode, 1); 1034 1035 ocfs2_inode_unlock(dir, 1); 1036 1037 brelse(fe_bh); 1038 brelse(parent_node_bh); 1039 1040 ocfs2_free_dir_lookup_result(&orphan_insert); 1041 ocfs2_free_dir_lookup_result(&lookup); 1042 1043 if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) 1044 mlog_errno(status); 1045 1046 return status; 1047 } 1048 1049 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, 1050 u64 src_inode_no, u64 dest_inode_no) 1051 { 1052 int ret = 0, i = 0; 1053 u64 parent_inode_no = 0; 1054 u64 child_inode_no = src_inode_no; 1055 struct inode *child_inode; 1056 1057 #define MAX_LOOKUP_TIMES 32 1058 while (1) { 1059 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); 1060 if (IS_ERR(child_inode)) { 1061 ret = PTR_ERR(child_inode); 1062 break; 1063 } 1064 1065 ret = ocfs2_inode_lock(child_inode, NULL, 0); 1066 if (ret < 0) { 1067 iput(child_inode); 1068 if (ret != -ENOENT) 1069 mlog_errno(ret); 1070 break; 1071 } 1072 1073 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, 1074 &parent_inode_no); 1075 ocfs2_inode_unlock(child_inode, 0); 1076 iput(child_inode); 1077 if (ret < 0) { 1078 ret = -ENOENT; 1079 break; 1080 } 1081 1082 if (parent_inode_no == dest_inode_no) { 1083 ret = 1; 1084 break; 1085 } 1086 1087 if (parent_inode_no == osb->root_inode->i_ino) { 1088 ret = 0; 1089 break; 1090 } 1091 1092 child_inode_no = parent_inode_no; 1093 1094 if (++i >= MAX_LOOKUP_TIMES) { 1095 mlog_ratelimited(ML_NOTICE, "max lookup times reached, " 1096 "filesystem may have nested directories, " 1097 "src inode: %llu, dest inode: %llu.\n", 1098 (unsigned long long)src_inode_no, 1099 (unsigned long long)dest_inode_no); 1100 ret = 0; 1101 break; 1102 } 1103 } 1104 1105 return ret; 1106 } 1107 1108 /* 1109 * The only place this should be used is rename and link! 1110 * if they have the same id, then the 1st one is the only one locked. 1111 */ 1112 static int ocfs2_double_lock(struct ocfs2_super *osb, 1113 struct buffer_head **bh1, 1114 struct inode *inode1, 1115 struct buffer_head **bh2, 1116 struct inode *inode2, 1117 int rename) 1118 { 1119 int status; 1120 int inode1_is_ancestor, inode2_is_ancestor; 1121 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 1122 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 1123 1124 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 1125 (unsigned long long)oi2->ip_blkno); 1126 1127 if (*bh1) 1128 *bh1 = NULL; 1129 if (*bh2) 1130 *bh2 = NULL; 1131 1132 /* we always want to lock the one with the lower lockid first. 1133 * and if they are nested, we lock ancestor first */ 1134 if (oi1->ip_blkno != oi2->ip_blkno) { 1135 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, 1136 oi1->ip_blkno); 1137 if (inode1_is_ancestor < 0) { 1138 status = inode1_is_ancestor; 1139 goto bail; 1140 } 1141 1142 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, 1143 oi2->ip_blkno); 1144 if (inode2_is_ancestor < 0) { 1145 status = inode2_is_ancestor; 1146 goto bail; 1147 } 1148 1149 if ((inode1_is_ancestor == 1) || 1150 (oi1->ip_blkno < oi2->ip_blkno && 1151 inode2_is_ancestor == 0)) { 1152 /* switch id1 and id2 around */ 1153 swap(bh2, bh1); 1154 swap(inode2, inode1); 1155 } 1156 /* lock id2 */ 1157 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 1158 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); 1159 if (status < 0) { 1160 if (status != -ENOENT) 1161 mlog_errno(status); 1162 goto bail; 1163 } 1164 } 1165 1166 /* lock id1 */ 1167 status = ocfs2_inode_lock_nested(inode1, bh1, 1, 1168 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 1169 if (status < 0) { 1170 /* 1171 * An error return must mean that no cluster locks 1172 * were held on function exit. 1173 */ 1174 if (oi1->ip_blkno != oi2->ip_blkno) { 1175 ocfs2_inode_unlock(inode2, 1); 1176 brelse(*bh2); 1177 *bh2 = NULL; 1178 } 1179 1180 if (status != -ENOENT) 1181 mlog_errno(status); 1182 } 1183 1184 trace_ocfs2_double_lock_end( 1185 (unsigned long long)oi1->ip_blkno, 1186 (unsigned long long)oi2->ip_blkno); 1187 1188 bail: 1189 if (status) 1190 mlog_errno(status); 1191 return status; 1192 } 1193 1194 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1195 { 1196 ocfs2_inode_unlock(inode1, 1); 1197 1198 if (inode1 != inode2) 1199 ocfs2_inode_unlock(inode2, 1); 1200 } 1201 1202 static int ocfs2_rename(struct user_namespace *mnt_userns, 1203 struct inode *old_dir, 1204 struct dentry *old_dentry, 1205 struct inode *new_dir, 1206 struct dentry *new_dentry, 1207 unsigned int flags) 1208 { 1209 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1210 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1211 struct inode *old_inode = d_inode(old_dentry); 1212 struct inode *new_inode = d_inode(new_dentry); 1213 struct inode *orphan_dir = NULL; 1214 struct ocfs2_dinode *newfe = NULL; 1215 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1216 struct buffer_head *newfe_bh = NULL; 1217 struct buffer_head *old_inode_bh = NULL; 1218 struct ocfs2_super *osb = NULL; 1219 u64 newfe_blkno, old_de_ino; 1220 handle_t *handle = NULL; 1221 struct buffer_head *old_dir_bh = NULL; 1222 struct buffer_head *new_dir_bh = NULL; 1223 u32 old_dir_nlink = old_dir->i_nlink; 1224 struct ocfs2_dinode *old_di; 1225 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1226 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1227 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1228 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1229 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1230 bool should_add_orphan = false; 1231 1232 if (flags) 1233 return -EINVAL; 1234 1235 /* At some point it might be nice to break this function up a 1236 * bit. */ 1237 1238 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, 1239 old_dentry->d_name.len, old_dentry->d_name.name, 1240 new_dentry->d_name.len, new_dentry->d_name.name); 1241 1242 status = dquot_initialize(old_dir); 1243 if (status) { 1244 mlog_errno(status); 1245 goto bail; 1246 } 1247 status = dquot_initialize(new_dir); 1248 if (status) { 1249 mlog_errno(status); 1250 goto bail; 1251 } 1252 1253 osb = OCFS2_SB(old_dir->i_sb); 1254 1255 if (new_inode) { 1256 if (!igrab(new_inode)) 1257 BUG(); 1258 } 1259 1260 /* Assume a directory hierarchy thusly: 1261 * a/b/c 1262 * a/d 1263 * a,b,c, and d are all directories. 1264 * 1265 * from cwd of 'a' on both nodes: 1266 * node1: mv b/c d 1267 * node2: mv d b/c 1268 * 1269 * And that's why, just like the VFS, we need a file system 1270 * rename lock. */ 1271 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1272 status = ocfs2_rename_lock(osb); 1273 if (status < 0) { 1274 mlog_errno(status); 1275 goto bail; 1276 } 1277 rename_lock = 1; 1278 1279 /* here we cannot guarantee the inodes haven't just been 1280 * changed, so check if they are nested again */ 1281 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, 1282 old_inode->i_ino); 1283 if (status < 0) { 1284 mlog_errno(status); 1285 goto bail; 1286 } else if (status == 1) { 1287 status = -EPERM; 1288 trace_ocfs2_rename_not_permitted( 1289 (unsigned long long)old_inode->i_ino, 1290 (unsigned long long)new_dir->i_ino); 1291 goto bail; 1292 } 1293 } 1294 1295 /* if old and new are the same, this'll just do one lock. */ 1296 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1297 &new_dir_bh, new_dir, 1); 1298 if (status < 0) { 1299 mlog_errno(status); 1300 goto bail; 1301 } 1302 parents_locked = 1; 1303 1304 if (!new_dir->i_nlink) { 1305 status = -EACCES; 1306 goto bail; 1307 } 1308 1309 /* make sure both dirs have bhs 1310 * get an extra ref on old_dir_bh if old==new */ 1311 if (!new_dir_bh) { 1312 if (old_dir_bh) { 1313 new_dir_bh = old_dir_bh; 1314 get_bh(new_dir_bh); 1315 } else { 1316 mlog(ML_ERROR, "no old_dir_bh!\n"); 1317 status = -EIO; 1318 goto bail; 1319 } 1320 } 1321 1322 /* 1323 * Aside from allowing a meta data update, the locking here 1324 * also ensures that the downconvert thread on other nodes 1325 * won't have to concurrently downconvert the inode and the 1326 * dentry locks. 1327 */ 1328 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1329 OI_LS_PARENT); 1330 if (status < 0) { 1331 if (status != -ENOENT) 1332 mlog_errno(status); 1333 goto bail; 1334 } 1335 old_child_locked = 1; 1336 1337 status = ocfs2_remote_dentry_delete(old_dentry); 1338 if (status < 0) { 1339 mlog_errno(status); 1340 goto bail; 1341 } 1342 1343 if (S_ISDIR(old_inode->i_mode)) { 1344 u64 old_inode_parent; 1345 1346 update_dot_dot = 1; 1347 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1348 old_inode, 1349 &old_inode_dot_dot_res); 1350 if (status) { 1351 status = -EIO; 1352 goto bail; 1353 } 1354 1355 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1356 status = -EIO; 1357 goto bail; 1358 } 1359 1360 if (!new_inode && new_dir != old_dir && 1361 new_dir->i_nlink >= ocfs2_link_max(osb)) { 1362 status = -EMLINK; 1363 goto bail; 1364 } 1365 } 1366 1367 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1368 old_dentry->d_name.len, 1369 &old_de_ino); 1370 if (status) { 1371 status = -ENOENT; 1372 goto bail; 1373 } 1374 1375 /* 1376 * Check for inode number is _not_ due to possible IO errors. 1377 * We might rmdir the source, keep it as pwd of some process 1378 * and merrily kill the link to whatever was created under the 1379 * same name. Goodbye sticky bit ;-< 1380 */ 1381 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1382 status = -ENOENT; 1383 goto bail; 1384 } 1385 1386 /* check if the target already exists (in which case we need 1387 * to delete it */ 1388 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1389 new_dentry->d_name.len, 1390 &newfe_blkno, new_dir, 1391 &target_lookup_res); 1392 /* The only error we allow here is -ENOENT because the new 1393 * file not existing is perfectly valid. */ 1394 if ((status < 0) && (status != -ENOENT)) { 1395 /* If we cannot find the file specified we should just */ 1396 /* return the error... */ 1397 mlog_errno(status); 1398 goto bail; 1399 } 1400 if (status == 0) 1401 target_exists = 1; 1402 1403 if (!target_exists && new_inode) { 1404 /* 1405 * Target was unlinked by another node while we were 1406 * waiting to get to ocfs2_rename(). There isn't 1407 * anything we can do here to help the situation, so 1408 * bubble up the appropriate error. 1409 */ 1410 status = -ENOENT; 1411 goto bail; 1412 } 1413 1414 /* In case we need to overwrite an existing file, we blow it 1415 * away first */ 1416 if (target_exists) { 1417 /* VFS didn't think there existed an inode here, but 1418 * someone else in the cluster must have raced our 1419 * rename to create one. Today we error cleanly, in 1420 * the future we should consider calling iget to build 1421 * a new struct inode for this entry. */ 1422 if (!new_inode) { 1423 status = -EACCES; 1424 1425 trace_ocfs2_rename_target_exists(new_dentry->d_name.len, 1426 new_dentry->d_name.name); 1427 goto bail; 1428 } 1429 1430 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1431 status = -EACCES; 1432 1433 trace_ocfs2_rename_disagree( 1434 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1435 (unsigned long long)newfe_blkno, 1436 OCFS2_I(new_inode)->ip_flags); 1437 goto bail; 1438 } 1439 1440 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1441 if (status < 0) { 1442 if (status != -ENOENT) 1443 mlog_errno(status); 1444 goto bail; 1445 } 1446 new_child_locked = 1; 1447 1448 status = ocfs2_remote_dentry_delete(new_dentry); 1449 if (status < 0) { 1450 mlog_errno(status); 1451 goto bail; 1452 } 1453 1454 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1455 1456 trace_ocfs2_rename_over_existing( 1457 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1458 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1459 1460 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1461 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1462 OCFS2_I(new_inode)->ip_blkno, 1463 orphan_name, &orphan_insert, 1464 false); 1465 if (status < 0) { 1466 mlog_errno(status); 1467 goto bail; 1468 } 1469 should_add_orphan = true; 1470 } 1471 } else { 1472 BUG_ON(d_inode(new_dentry->d_parent) != new_dir); 1473 1474 status = ocfs2_check_dir_for_entry(new_dir, 1475 new_dentry->d_name.name, 1476 new_dentry->d_name.len); 1477 if (status) 1478 goto bail; 1479 1480 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1481 new_dentry->d_name.name, 1482 new_dentry->d_name.len, 1483 &target_insert); 1484 if (status < 0) { 1485 mlog_errno(status); 1486 goto bail; 1487 } 1488 } 1489 1490 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1491 if (IS_ERR(handle)) { 1492 status = PTR_ERR(handle); 1493 handle = NULL; 1494 mlog_errno(status); 1495 goto bail; 1496 } 1497 1498 if (target_exists) { 1499 if (S_ISDIR(new_inode->i_mode)) { 1500 if (new_inode->i_nlink != 2 || 1501 !ocfs2_empty_dir(new_inode)) { 1502 status = -ENOTEMPTY; 1503 goto bail; 1504 } 1505 } 1506 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1507 newfe_bh, 1508 OCFS2_JOURNAL_ACCESS_WRITE); 1509 if (status < 0) { 1510 mlog_errno(status); 1511 goto bail; 1512 } 1513 1514 /* change the dirent to point to the correct inode */ 1515 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1516 old_inode); 1517 if (status < 0) { 1518 mlog_errno(status); 1519 goto bail; 1520 } 1521 inode_inc_iversion(new_dir); 1522 1523 if (S_ISDIR(new_inode->i_mode)) 1524 ocfs2_set_links_count(newfe, 0); 1525 else 1526 ocfs2_add_links_count(newfe, -1); 1527 ocfs2_journal_dirty(handle, newfe_bh); 1528 if (should_add_orphan) { 1529 status = ocfs2_orphan_add(osb, handle, new_inode, 1530 newfe_bh, orphan_name, 1531 &orphan_insert, orphan_dir, false); 1532 if (status < 0) { 1533 mlog_errno(status); 1534 goto bail; 1535 } 1536 } 1537 } else { 1538 /* if the name was not found in new_dir, add it now */ 1539 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1540 OCFS2_I(old_inode)->ip_blkno, 1541 new_dir_bh, &target_insert); 1542 } 1543 1544 old_inode->i_ctime = current_time(old_inode); 1545 mark_inode_dirty(old_inode); 1546 1547 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1548 old_inode_bh, 1549 OCFS2_JOURNAL_ACCESS_WRITE); 1550 if (status >= 0) { 1551 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1552 1553 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); 1554 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); 1555 ocfs2_journal_dirty(handle, old_inode_bh); 1556 } else 1557 mlog_errno(status); 1558 1559 /* 1560 * Now that the name has been added to new_dir, remove the old name. 1561 * 1562 * We don't keep any directory entry context around until now 1563 * because the insert might have changed the type of directory 1564 * we're dealing with. 1565 */ 1566 status = ocfs2_find_entry(old_dentry->d_name.name, 1567 old_dentry->d_name.len, old_dir, 1568 &old_entry_lookup); 1569 if (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 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1580 if (status < 0) { 1581 mlog_errno(status); 1582 if (!is_journal_aborted(osb->journal->j_journal)) { 1583 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1584 "is not deleted.", 1585 new_dentry->d_name.len, new_dentry->d_name.name, 1586 old_dentry->d_name.len, old_dentry->d_name.name); 1587 } 1588 goto bail; 1589 } 1590 1591 if (new_inode) { 1592 drop_nlink(new_inode); 1593 new_inode->i_ctime = current_time(new_inode); 1594 } 1595 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir); 1596 1597 if (update_dot_dot) { 1598 status = ocfs2_update_entry(old_inode, handle, 1599 &old_inode_dot_dot_res, new_dir); 1600 drop_nlink(old_dir); 1601 if (new_inode) { 1602 drop_nlink(new_inode); 1603 } else { 1604 inc_nlink(new_dir); 1605 mark_inode_dirty(new_dir); 1606 } 1607 } 1608 mark_inode_dirty(old_dir); 1609 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1610 if (new_inode) { 1611 mark_inode_dirty(new_inode); 1612 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1613 } 1614 1615 if (old_dir != new_dir) { 1616 /* Keep the same times on both directories.*/ 1617 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; 1618 1619 /* 1620 * This will also pick up the i_nlink change from the 1621 * block above. 1622 */ 1623 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1624 } 1625 1626 if (old_dir_nlink != old_dir->i_nlink) { 1627 if (!old_dir_bh) { 1628 mlog(ML_ERROR, "need to change nlink for old dir " 1629 "%llu from %d to %d but bh is NULL!\n", 1630 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1631 (int)old_dir_nlink, old_dir->i_nlink); 1632 } else { 1633 struct ocfs2_dinode *fe; 1634 status = ocfs2_journal_access_di(handle, 1635 INODE_CACHE(old_dir), 1636 old_dir_bh, 1637 OCFS2_JOURNAL_ACCESS_WRITE); 1638 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1639 ocfs2_set_links_count(fe, old_dir->i_nlink); 1640 ocfs2_journal_dirty(handle, old_dir_bh); 1641 } 1642 } 1643 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1644 status = 0; 1645 bail: 1646 if (handle) 1647 ocfs2_commit_trans(osb, handle); 1648 1649 if (orphan_dir) { 1650 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1651 ocfs2_inode_unlock(orphan_dir, 1); 1652 inode_unlock(orphan_dir); 1653 iput(orphan_dir); 1654 } 1655 1656 if (new_child_locked) 1657 ocfs2_inode_unlock(new_inode, 1); 1658 1659 if (old_child_locked) 1660 ocfs2_inode_unlock(old_inode, 1); 1661 1662 if (parents_locked) 1663 ocfs2_double_unlock(old_dir, new_dir); 1664 1665 if (rename_lock) 1666 ocfs2_rename_unlock(osb); 1667 1668 if (new_inode) 1669 sync_mapping_buffers(old_inode->i_mapping); 1670 1671 iput(new_inode); 1672 1673 ocfs2_free_dir_lookup_result(&target_lookup_res); 1674 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1675 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1676 ocfs2_free_dir_lookup_result(&orphan_insert); 1677 ocfs2_free_dir_lookup_result(&target_insert); 1678 1679 brelse(newfe_bh); 1680 brelse(old_inode_bh); 1681 brelse(old_dir_bh); 1682 brelse(new_dir_bh); 1683 1684 if (status) 1685 mlog_errno(status); 1686 1687 return status; 1688 } 1689 1690 /* 1691 * we expect i_size = strlen(symname). Copy symname into the file 1692 * data, including the null terminator. 1693 */ 1694 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1695 handle_t *handle, 1696 struct inode *inode, 1697 const char *symname) 1698 { 1699 struct buffer_head **bhs = NULL; 1700 const char *c; 1701 struct super_block *sb = osb->sb; 1702 u64 p_blkno, p_blocks; 1703 int virtual, blocks, status, i, bytes_left; 1704 1705 bytes_left = i_size_read(inode) + 1; 1706 /* we can't trust i_blocks because we're actually going to 1707 * write i_size + 1 bytes. */ 1708 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1709 1710 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, 1711 i_size_read(inode), blocks); 1712 1713 /* Sanity check -- make sure we're going to fit. */ 1714 if (bytes_left > 1715 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1716 status = -EIO; 1717 mlog_errno(status); 1718 goto bail; 1719 } 1720 1721 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1722 if (!bhs) { 1723 status = -ENOMEM; 1724 mlog_errno(status); 1725 goto bail; 1726 } 1727 1728 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1729 NULL); 1730 if (status < 0) { 1731 mlog_errno(status); 1732 goto bail; 1733 } 1734 1735 /* links can never be larger than one cluster so we know this 1736 * is all going to be contiguous, but do a sanity check 1737 * anyway. */ 1738 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1739 status = -EIO; 1740 mlog_errno(status); 1741 goto bail; 1742 } 1743 1744 virtual = 0; 1745 while(bytes_left > 0) { 1746 c = &symname[virtual * sb->s_blocksize]; 1747 1748 bhs[virtual] = sb_getblk(sb, p_blkno); 1749 if (!bhs[virtual]) { 1750 status = -ENOMEM; 1751 mlog_errno(status); 1752 goto bail; 1753 } 1754 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1755 bhs[virtual]); 1756 1757 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1758 bhs[virtual], 1759 OCFS2_JOURNAL_ACCESS_CREATE); 1760 if (status < 0) { 1761 mlog_errno(status); 1762 goto bail; 1763 } 1764 1765 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1766 1767 memcpy(bhs[virtual]->b_data, c, 1768 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1769 bytes_left); 1770 1771 ocfs2_journal_dirty(handle, bhs[virtual]); 1772 1773 virtual++; 1774 p_blkno++; 1775 bytes_left -= sb->s_blocksize; 1776 } 1777 1778 status = 0; 1779 bail: 1780 1781 if (bhs) { 1782 for(i = 0; i < blocks; i++) 1783 brelse(bhs[i]); 1784 kfree(bhs); 1785 } 1786 1787 if (status) 1788 mlog_errno(status); 1789 return status; 1790 } 1791 1792 static int ocfs2_symlink(struct user_namespace *mnt_userns, 1793 struct inode *dir, 1794 struct dentry *dentry, 1795 const char *symname) 1796 { 1797 int status, l, credits; 1798 u64 newsize; 1799 struct ocfs2_super *osb = NULL; 1800 struct inode *inode = NULL; 1801 struct super_block *sb; 1802 struct buffer_head *new_fe_bh = NULL; 1803 struct buffer_head *parent_fe_bh = NULL; 1804 struct ocfs2_dinode *fe = NULL; 1805 struct ocfs2_dinode *dirfe; 1806 handle_t *handle = NULL; 1807 struct ocfs2_alloc_context *inode_ac = NULL; 1808 struct ocfs2_alloc_context *data_ac = NULL; 1809 struct ocfs2_alloc_context *xattr_ac = NULL; 1810 int want_clusters = 0; 1811 int xattr_credits = 0; 1812 struct ocfs2_security_xattr_info si = { 1813 .enable = 1, 1814 }; 1815 int did_quota = 0, did_quota_inode = 0; 1816 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1817 sigset_t oldset; 1818 int did_block_signals = 0; 1819 struct ocfs2_dentry_lock *dl = NULL; 1820 1821 trace_ocfs2_symlink_begin(dir, dentry, symname, 1822 dentry->d_name.len, dentry->d_name.name); 1823 1824 status = dquot_initialize(dir); 1825 if (status) { 1826 mlog_errno(status); 1827 goto bail; 1828 } 1829 1830 sb = dir->i_sb; 1831 osb = OCFS2_SB(sb); 1832 1833 l = strlen(symname) + 1; 1834 1835 credits = ocfs2_calc_symlink_credits(sb); 1836 1837 /* lock the parent directory */ 1838 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1839 if (status < 0) { 1840 if (status != -ENOENT) 1841 mlog_errno(status); 1842 return status; 1843 } 1844 1845 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1846 if (!ocfs2_read_links_count(dirfe)) { 1847 /* can't make a file in a deleted directory. */ 1848 status = -ENOENT; 1849 goto bail; 1850 } 1851 1852 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1853 dentry->d_name.len); 1854 if (status) 1855 goto bail; 1856 1857 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1858 dentry->d_name.name, 1859 dentry->d_name.len, &lookup); 1860 if (status < 0) { 1861 mlog_errno(status); 1862 goto bail; 1863 } 1864 1865 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1866 if (status < 0) { 1867 if (status != -ENOSPC) 1868 mlog_errno(status); 1869 goto bail; 1870 } 1871 1872 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1873 if (IS_ERR(inode)) { 1874 status = PTR_ERR(inode); 1875 inode = NULL; 1876 mlog_errno(status); 1877 goto bail; 1878 } 1879 1880 /* get security xattr */ 1881 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1882 if (status) { 1883 if (status == -EOPNOTSUPP) 1884 si.enable = 0; 1885 else { 1886 mlog_errno(status); 1887 goto bail; 1888 } 1889 } 1890 1891 /* calculate meta data/clusters for setting security xattr */ 1892 if (si.enable) { 1893 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1894 &xattr_credits, &xattr_ac); 1895 if (status < 0) { 1896 mlog_errno(status); 1897 goto bail; 1898 } 1899 } 1900 1901 /* don't reserve bitmap space for fast symlinks. */ 1902 if (l > ocfs2_fast_symlink_chars(sb)) 1903 want_clusters += 1; 1904 1905 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1906 if (status < 0) { 1907 if (status != -ENOSPC) 1908 mlog_errno(status); 1909 goto bail; 1910 } 1911 1912 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1913 if (IS_ERR(handle)) { 1914 status = PTR_ERR(handle); 1915 handle = NULL; 1916 mlog_errno(status); 1917 goto bail; 1918 } 1919 1920 /* Starting to change things, restart is no longer possible. */ 1921 ocfs2_block_signals(&oldset); 1922 did_block_signals = 1; 1923 1924 status = dquot_alloc_inode(inode); 1925 if (status) 1926 goto bail; 1927 did_quota_inode = 1; 1928 1929 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1930 dentry->d_name.name, 1931 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1932 inode->i_mode); 1933 1934 status = ocfs2_mknod_locked(osb, dir, inode, 1935 0, &new_fe_bh, parent_fe_bh, handle, 1936 inode_ac); 1937 if (status < 0) { 1938 mlog_errno(status); 1939 goto bail; 1940 } 1941 1942 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1943 inode->i_rdev = 0; 1944 newsize = l - 1; 1945 inode->i_op = &ocfs2_symlink_inode_operations; 1946 inode_nohighmem(inode); 1947 if (l > ocfs2_fast_symlink_chars(sb)) { 1948 u32 offset = 0; 1949 1950 status = dquot_alloc_space_nodirty(inode, 1951 ocfs2_clusters_to_bytes(osb->sb, 1)); 1952 if (status) 1953 goto bail; 1954 did_quota = 1; 1955 inode->i_mapping->a_ops = &ocfs2_aops; 1956 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1957 new_fe_bh, 1958 handle, data_ac, NULL, 1959 NULL); 1960 if (status < 0) { 1961 if (status != -ENOSPC && status != -EINTR) { 1962 mlog(ML_ERROR, 1963 "Failed to extend file to %llu\n", 1964 (unsigned long long)newsize); 1965 mlog_errno(status); 1966 status = -ENOSPC; 1967 } 1968 goto bail; 1969 } 1970 i_size_write(inode, newsize); 1971 inode->i_blocks = ocfs2_inode_sector_count(inode); 1972 } else { 1973 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1974 memcpy((char *) fe->id2.i_symlink, symname, l); 1975 i_size_write(inode, newsize); 1976 inode->i_blocks = 0; 1977 } 1978 1979 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1980 if (status < 0) { 1981 mlog_errno(status); 1982 goto bail; 1983 } 1984 1985 if (!ocfs2_inode_is_fast_symlink(inode)) { 1986 status = ocfs2_create_symlink_data(osb, handle, inode, 1987 symname); 1988 if (status < 0) { 1989 mlog_errno(status); 1990 goto bail; 1991 } 1992 } 1993 1994 if (si.enable) { 1995 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 1996 xattr_ac, data_ac); 1997 if (status < 0) { 1998 mlog_errno(status); 1999 goto bail; 2000 } 2001 } 2002 2003 /* 2004 * Do this before adding the entry to the directory. We add 2005 * also set d_op after success so that ->d_iput() will cleanup 2006 * the dentry lock even if ocfs2_add_entry() fails below. 2007 */ 2008 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 2009 if (status) { 2010 mlog_errno(status); 2011 goto bail; 2012 } 2013 2014 dl = dentry->d_fsdata; 2015 2016 status = ocfs2_add_entry(handle, dentry, inode, 2017 le64_to_cpu(fe->i_blkno), parent_fe_bh, 2018 &lookup); 2019 if (status < 0) { 2020 mlog_errno(status); 2021 goto bail; 2022 } 2023 2024 insert_inode_hash(inode); 2025 d_instantiate(dentry, inode); 2026 bail: 2027 if (status < 0 && did_quota) 2028 dquot_free_space_nodirty(inode, 2029 ocfs2_clusters_to_bytes(osb->sb, 1)); 2030 if (status < 0 && did_quota_inode) 2031 dquot_free_inode(inode); 2032 if (handle) 2033 ocfs2_commit_trans(osb, handle); 2034 2035 ocfs2_inode_unlock(dir, 1); 2036 if (did_block_signals) 2037 ocfs2_unblock_signals(&oldset); 2038 2039 brelse(new_fe_bh); 2040 brelse(parent_fe_bh); 2041 kfree(si.value); 2042 ocfs2_free_dir_lookup_result(&lookup); 2043 if (inode_ac) 2044 ocfs2_free_alloc_context(inode_ac); 2045 if (data_ac) 2046 ocfs2_free_alloc_context(data_ac); 2047 if (xattr_ac) 2048 ocfs2_free_alloc_context(xattr_ac); 2049 if ((status < 0) && inode) { 2050 if (dl) 2051 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 2052 2053 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 2054 clear_nlink(inode); 2055 iput(inode); 2056 } 2057 2058 if (status) 2059 mlog_errno(status); 2060 2061 return status; 2062 } 2063 2064 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2065 { 2066 int status, namelen; 2067 2068 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2069 (long long)blkno); 2070 if (namelen <= 0) { 2071 if (namelen) 2072 status = namelen; 2073 else 2074 status = -EINVAL; 2075 mlog_errno(status); 2076 goto bail; 2077 } 2078 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2079 status = -EINVAL; 2080 mlog_errno(status); 2081 goto bail; 2082 } 2083 2084 trace_ocfs2_blkno_stringify(blkno, name, namelen); 2085 2086 status = 0; 2087 bail: 2088 if (status < 0) 2089 mlog_errno(status); 2090 return status; 2091 } 2092 2093 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, 2094 struct inode **ret_orphan_dir, 2095 struct buffer_head **ret_orphan_dir_bh) 2096 { 2097 struct inode *orphan_dir_inode; 2098 struct buffer_head *orphan_dir_bh = NULL; 2099 int ret = 0; 2100 2101 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2102 ORPHAN_DIR_SYSTEM_INODE, 2103 osb->slot_num); 2104 if (!orphan_dir_inode) { 2105 ret = -ENOENT; 2106 mlog_errno(ret); 2107 return ret; 2108 } 2109 2110 inode_lock(orphan_dir_inode); 2111 2112 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2113 if (ret < 0) { 2114 inode_unlock(orphan_dir_inode); 2115 iput(orphan_dir_inode); 2116 2117 mlog_errno(ret); 2118 return ret; 2119 } 2120 2121 *ret_orphan_dir = orphan_dir_inode; 2122 *ret_orphan_dir_bh = orphan_dir_bh; 2123 2124 return 0; 2125 } 2126 2127 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, 2128 struct buffer_head *orphan_dir_bh, 2129 u64 blkno, 2130 char *name, 2131 struct ocfs2_dir_lookup_result *lookup, 2132 bool dio) 2133 { 2134 int ret; 2135 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); 2136 int namelen = dio ? 2137 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2138 OCFS2_ORPHAN_NAMELEN; 2139 2140 if (dio) { 2141 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2142 OCFS2_DIO_ORPHAN_PREFIX); 2143 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2144 ret = -EINVAL; 2145 mlog_errno(ret); 2146 return ret; 2147 } 2148 2149 ret = ocfs2_blkno_stringify(blkno, 2150 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2151 } else 2152 ret = ocfs2_blkno_stringify(blkno, name); 2153 if (ret < 0) { 2154 mlog_errno(ret); 2155 return ret; 2156 } 2157 2158 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2159 orphan_dir_bh, name, 2160 namelen, lookup); 2161 if (ret < 0) { 2162 mlog_errno(ret); 2163 return ret; 2164 } 2165 2166 return 0; 2167 } 2168 2169 /** 2170 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for 2171 * insertion of an orphan. 2172 * @osb: ocfs2 file system 2173 * @ret_orphan_dir: Orphan dir inode - returned locked! 2174 * @blkno: Actual block number of the inode to be inserted into orphan dir. 2175 * @lookup: dir lookup result, to be passed back into functions like 2176 * ocfs2_orphan_add 2177 * 2178 * Returns zero on success and the ret_orphan_dir, name and lookup 2179 * fields will be populated. 2180 * 2181 * Returns non-zero on failure. 2182 */ 2183 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2184 struct inode **ret_orphan_dir, 2185 u64 blkno, 2186 char *name, 2187 struct ocfs2_dir_lookup_result *lookup, 2188 bool dio) 2189 { 2190 struct inode *orphan_dir_inode = NULL; 2191 struct buffer_head *orphan_dir_bh = NULL; 2192 int ret = 0; 2193 2194 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, 2195 &orphan_dir_bh); 2196 if (ret < 0) { 2197 mlog_errno(ret); 2198 return ret; 2199 } 2200 2201 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, 2202 blkno, name, lookup, dio); 2203 if (ret < 0) { 2204 mlog_errno(ret); 2205 goto out; 2206 } 2207 2208 *ret_orphan_dir = orphan_dir_inode; 2209 2210 out: 2211 brelse(orphan_dir_bh); 2212 2213 if (ret) { 2214 ocfs2_inode_unlock(orphan_dir_inode, 1); 2215 inode_unlock(orphan_dir_inode); 2216 iput(orphan_dir_inode); 2217 } 2218 2219 if (ret) 2220 mlog_errno(ret); 2221 return ret; 2222 } 2223 2224 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2225 handle_t *handle, 2226 struct inode *inode, 2227 struct buffer_head *fe_bh, 2228 char *name, 2229 struct ocfs2_dir_lookup_result *lookup, 2230 struct inode *orphan_dir_inode, 2231 bool dio) 2232 { 2233 struct buffer_head *orphan_dir_bh = NULL; 2234 int status = 0; 2235 struct ocfs2_dinode *orphan_fe; 2236 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 2237 int namelen = dio ? 2238 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2239 OCFS2_ORPHAN_NAMELEN; 2240 2241 trace_ocfs2_orphan_add_begin( 2242 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2243 2244 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 2245 if (status < 0) { 2246 mlog_errno(status); 2247 goto leave; 2248 } 2249 2250 status = ocfs2_journal_access_di(handle, 2251 INODE_CACHE(orphan_dir_inode), 2252 orphan_dir_bh, 2253 OCFS2_JOURNAL_ACCESS_WRITE); 2254 if (status < 0) { 2255 mlog_errno(status); 2256 goto leave; 2257 } 2258 2259 /* 2260 * We're going to journal the change of i_flags and i_orphaned_slot. 2261 * It's safe anyway, though some callers may duplicate the journaling. 2262 * Journaling within the func just make the logic look more 2263 * straightforward. 2264 */ 2265 status = ocfs2_journal_access_di(handle, 2266 INODE_CACHE(inode), 2267 fe_bh, 2268 OCFS2_JOURNAL_ACCESS_WRITE); 2269 if (status < 0) { 2270 mlog_errno(status); 2271 goto leave; 2272 } 2273 2274 /* we're a cluster, and nlink can change on disk from 2275 * underneath us... */ 2276 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2277 if (S_ISDIR(inode->i_mode)) 2278 ocfs2_add_links_count(orphan_fe, 1); 2279 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2280 ocfs2_journal_dirty(handle, orphan_dir_bh); 2281 2282 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2283 namelen, inode, 2284 OCFS2_I(inode)->ip_blkno, 2285 orphan_dir_bh, lookup); 2286 if (status < 0) { 2287 mlog_errno(status); 2288 goto rollback; 2289 } 2290 2291 if (dio) { 2292 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan 2293 * slot. 2294 */ 2295 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2296 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); 2297 } else { 2298 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL); 2299 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; 2300 2301 /* Record which orphan dir our inode now resides 2302 * in. delete_inode will use this to determine which orphan 2303 * dir to lock. */ 2304 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2305 } 2306 2307 ocfs2_journal_dirty(handle, fe_bh); 2308 2309 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, 2310 osb->slot_num); 2311 2312 rollback: 2313 if (status < 0) { 2314 if (S_ISDIR(inode->i_mode)) 2315 ocfs2_add_links_count(orphan_fe, -1); 2316 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2317 } 2318 2319 leave: 2320 brelse(orphan_dir_bh); 2321 2322 return status; 2323 } 2324 2325 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2326 int ocfs2_orphan_del(struct ocfs2_super *osb, 2327 handle_t *handle, 2328 struct inode *orphan_dir_inode, 2329 struct inode *inode, 2330 struct buffer_head *orphan_dir_bh, 2331 bool dio) 2332 { 2333 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2334 struct ocfs2_dinode *orphan_fe; 2335 int status = 0; 2336 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2337 2338 if (dio) { 2339 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2340 OCFS2_DIO_ORPHAN_PREFIX); 2341 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2342 status = -EINVAL; 2343 mlog_errno(status); 2344 return status; 2345 } 2346 2347 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, 2348 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2349 } else 2350 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2351 if (status < 0) { 2352 mlog_errno(status); 2353 goto leave; 2354 } 2355 2356 trace_ocfs2_orphan_del( 2357 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2358 name, strlen(name)); 2359 2360 status = ocfs2_journal_access_di(handle, 2361 INODE_CACHE(orphan_dir_inode), 2362 orphan_dir_bh, 2363 OCFS2_JOURNAL_ACCESS_WRITE); 2364 if (status < 0) { 2365 mlog_errno(status); 2366 goto leave; 2367 } 2368 2369 /* find it's spot in the orphan directory */ 2370 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode, 2371 &lookup); 2372 if (status) { 2373 mlog_errno(status); 2374 goto leave; 2375 } 2376 2377 /* remove it from the orphan directory */ 2378 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); 2379 if (status < 0) { 2380 mlog_errno(status); 2381 goto leave; 2382 } 2383 2384 /* do the i_nlink dance! :) */ 2385 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2386 if (S_ISDIR(inode->i_mode)) 2387 ocfs2_add_links_count(orphan_fe, -1); 2388 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2389 ocfs2_journal_dirty(handle, orphan_dir_bh); 2390 2391 leave: 2392 ocfs2_free_dir_lookup_result(&lookup); 2393 2394 if (status) 2395 mlog_errno(status); 2396 return status; 2397 } 2398 2399 /** 2400 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly 2401 * allocated file. This is different from the typical 'add to orphan dir' 2402 * operation in that the inode does not yet exist. This is a problem because 2403 * the orphan dir stringifies the inode block number to come up with it's 2404 * dirent. Obviously if the inode does not yet exist we have a chicken and egg 2405 * problem. This function works around it by calling deeper into the orphan 2406 * and suballoc code than other callers. Use this only by necessity. 2407 * @dir: The directory which this inode will ultimately wind up under - not the 2408 * orphan dir! 2409 * @dir_bh: buffer_head the @dir inode block 2410 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled 2411 * with the string to be used for orphan dirent. Pass back to the orphan dir 2412 * code. 2413 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan 2414 * dir code. 2415 * @ret_di_blkno: block number where the new inode will be allocated. 2416 * @orphan_insert: Dir insert context to be passed back into orphan dir code. 2417 * @ret_inode_ac: Inode alloc context to be passed back to the allocator. 2418 * 2419 * Returns zero on success and the ret_orphan_dir, name and lookup 2420 * fields will be populated. 2421 * 2422 * Returns non-zero on failure. 2423 */ 2424 static int ocfs2_prep_new_orphaned_file(struct inode *dir, 2425 struct buffer_head *dir_bh, 2426 char *orphan_name, 2427 struct inode **ret_orphan_dir, 2428 u64 *ret_di_blkno, 2429 struct ocfs2_dir_lookup_result *orphan_insert, 2430 struct ocfs2_alloc_context **ret_inode_ac) 2431 { 2432 int ret; 2433 u64 di_blkno; 2434 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2435 struct inode *orphan_dir = NULL; 2436 struct buffer_head *orphan_dir_bh = NULL; 2437 struct ocfs2_alloc_context *inode_ac = NULL; 2438 2439 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); 2440 if (ret < 0) { 2441 mlog_errno(ret); 2442 return ret; 2443 } 2444 2445 /* reserve an inode spot */ 2446 ret = ocfs2_reserve_new_inode(osb, &inode_ac); 2447 if (ret < 0) { 2448 if (ret != -ENOSPC) 2449 mlog_errno(ret); 2450 goto out; 2451 } 2452 2453 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, 2454 &di_blkno); 2455 if (ret) { 2456 mlog_errno(ret); 2457 goto out; 2458 } 2459 2460 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, 2461 di_blkno, orphan_name, orphan_insert, 2462 false); 2463 if (ret < 0) { 2464 mlog_errno(ret); 2465 goto out; 2466 } 2467 2468 out: 2469 if (ret == 0) { 2470 *ret_orphan_dir = orphan_dir; 2471 *ret_di_blkno = di_blkno; 2472 *ret_inode_ac = inode_ac; 2473 /* 2474 * orphan_name and orphan_insert are already up to 2475 * date via prepare_orphan_dir 2476 */ 2477 } else { 2478 /* Unroll reserve_new_inode* */ 2479 if (inode_ac) 2480 ocfs2_free_alloc_context(inode_ac); 2481 2482 /* Unroll orphan dir locking */ 2483 inode_unlock(orphan_dir); 2484 ocfs2_inode_unlock(orphan_dir, 1); 2485 iput(orphan_dir); 2486 } 2487 2488 brelse(orphan_dir_bh); 2489 2490 return ret; 2491 } 2492 2493 int ocfs2_create_inode_in_orphan(struct inode *dir, 2494 int mode, 2495 struct inode **new_inode) 2496 { 2497 int status, did_quota_inode = 0; 2498 struct inode *inode = NULL; 2499 struct inode *orphan_dir = NULL; 2500 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2501 handle_t *handle = NULL; 2502 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2503 struct buffer_head *parent_di_bh = NULL; 2504 struct buffer_head *new_di_bh = NULL; 2505 struct ocfs2_alloc_context *inode_ac = NULL; 2506 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2507 u64 di_blkno, suballoc_loc; 2508 u16 suballoc_bit; 2509 2510 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2511 if (status < 0) { 2512 if (status != -ENOENT) 2513 mlog_errno(status); 2514 return status; 2515 } 2516 2517 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, 2518 orphan_name, &orphan_dir, 2519 &di_blkno, &orphan_insert, &inode_ac); 2520 if (status < 0) { 2521 if (status != -ENOSPC) 2522 mlog_errno(status); 2523 goto leave; 2524 } 2525 2526 inode = ocfs2_get_init_inode(dir, mode); 2527 if (IS_ERR(inode)) { 2528 status = PTR_ERR(inode); 2529 inode = NULL; 2530 mlog_errno(status); 2531 goto leave; 2532 } 2533 2534 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2535 if (IS_ERR(handle)) { 2536 status = PTR_ERR(handle); 2537 handle = NULL; 2538 mlog_errno(status); 2539 goto leave; 2540 } 2541 2542 status = dquot_alloc_inode(inode); 2543 if (status) 2544 goto leave; 2545 did_quota_inode = 1; 2546 2547 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, 2548 &suballoc_loc, 2549 &suballoc_bit, di_blkno); 2550 if (status < 0) { 2551 mlog_errno(status); 2552 goto leave; 2553 } 2554 2555 clear_nlink(inode); 2556 /* do the real work now. */ 2557 status = __ocfs2_mknod_locked(dir, inode, 2558 0, &new_di_bh, parent_di_bh, handle, 2559 inode_ac, di_blkno, suballoc_loc, 2560 suballoc_bit); 2561 if (status < 0) { 2562 mlog_errno(status); 2563 goto leave; 2564 } 2565 2566 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, 2567 &orphan_insert, orphan_dir, false); 2568 if (status < 0) { 2569 mlog_errno(status); 2570 goto leave; 2571 } 2572 2573 /* get open lock so that only nodes can't remove it from orphan dir. */ 2574 status = ocfs2_open_lock(inode); 2575 if (status < 0) 2576 mlog_errno(status); 2577 2578 insert_inode_hash(inode); 2579 leave: 2580 if (status < 0 && did_quota_inode) 2581 dquot_free_inode(inode); 2582 if (handle) 2583 ocfs2_commit_trans(osb, handle); 2584 2585 if (orphan_dir) { 2586 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2587 ocfs2_inode_unlock(orphan_dir, 1); 2588 inode_unlock(orphan_dir); 2589 iput(orphan_dir); 2590 } 2591 2592 if ((status < 0) && inode) { 2593 clear_nlink(inode); 2594 iput(inode); 2595 } 2596 2597 if (inode_ac) 2598 ocfs2_free_alloc_context(inode_ac); 2599 2600 brelse(new_di_bh); 2601 2602 if (!status) 2603 *new_inode = inode; 2604 2605 ocfs2_free_dir_lookup_result(&orphan_insert); 2606 2607 ocfs2_inode_unlock(dir, 1); 2608 brelse(parent_di_bh); 2609 return status; 2610 } 2611 2612 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, 2613 struct inode *inode) 2614 { 2615 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2616 struct inode *orphan_dir_inode = NULL; 2617 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2618 struct buffer_head *di_bh = NULL; 2619 int status = 0; 2620 handle_t *handle = NULL; 2621 struct ocfs2_dinode *di = NULL; 2622 2623 status = ocfs2_inode_lock(inode, &di_bh, 1); 2624 if (status < 0) { 2625 mlog_errno(status); 2626 goto bail; 2627 } 2628 2629 di = (struct ocfs2_dinode *) di_bh->b_data; 2630 /* 2631 * Another append dio crashed? 2632 * If so, manually recover it first. 2633 */ 2634 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 2635 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode)); 2636 if (status < 0) { 2637 if (status != -ENOSPC) 2638 mlog_errno(status); 2639 goto bail_unlock_inode; 2640 } 2641 2642 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0); 2643 if (status < 0) { 2644 mlog_errno(status); 2645 goto bail_unlock_inode; 2646 } 2647 } 2648 2649 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, 2650 OCFS2_I(inode)->ip_blkno, 2651 orphan_name, 2652 &orphan_insert, 2653 true); 2654 if (status < 0) { 2655 mlog_errno(status); 2656 goto bail_unlock_inode; 2657 } 2658 2659 handle = ocfs2_start_trans(osb, 2660 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); 2661 if (IS_ERR(handle)) { 2662 status = PTR_ERR(handle); 2663 goto bail_unlock_orphan; 2664 } 2665 2666 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, 2667 &orphan_insert, orphan_dir_inode, true); 2668 if (status) 2669 mlog_errno(status); 2670 2671 ocfs2_commit_trans(osb, handle); 2672 2673 bail_unlock_orphan: 2674 ocfs2_inode_unlock(orphan_dir_inode, 1); 2675 inode_unlock(orphan_dir_inode); 2676 iput(orphan_dir_inode); 2677 2678 ocfs2_free_dir_lookup_result(&orphan_insert); 2679 2680 bail_unlock_inode: 2681 ocfs2_inode_unlock(inode, 1); 2682 brelse(di_bh); 2683 2684 bail: 2685 return status; 2686 } 2687 2688 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, 2689 struct inode *inode, struct buffer_head *di_bh, 2690 int update_isize, loff_t end) 2691 { 2692 struct inode *orphan_dir_inode = NULL; 2693 struct buffer_head *orphan_dir_bh = NULL; 2694 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2695 handle_t *handle = NULL; 2696 int status = 0; 2697 2698 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2699 ORPHAN_DIR_SYSTEM_INODE, 2700 le16_to_cpu(di->i_dio_orphaned_slot)); 2701 if (!orphan_dir_inode) { 2702 status = -ENOENT; 2703 mlog_errno(status); 2704 goto bail; 2705 } 2706 2707 inode_lock(orphan_dir_inode); 2708 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2709 if (status < 0) { 2710 inode_unlock(orphan_dir_inode); 2711 iput(orphan_dir_inode); 2712 mlog_errno(status); 2713 goto bail; 2714 } 2715 2716 handle = ocfs2_start_trans(osb, 2717 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); 2718 if (IS_ERR(handle)) { 2719 status = PTR_ERR(handle); 2720 goto bail_unlock_orphan; 2721 } 2722 2723 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); 2724 2725 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, 2726 inode, orphan_dir_bh, true); 2727 if (status < 0) { 2728 mlog_errno(status); 2729 goto bail_commit; 2730 } 2731 2732 status = ocfs2_journal_access_di(handle, 2733 INODE_CACHE(inode), 2734 di_bh, 2735 OCFS2_JOURNAL_ACCESS_WRITE); 2736 if (status < 0) { 2737 mlog_errno(status); 2738 goto bail_commit; 2739 } 2740 2741 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2742 di->i_dio_orphaned_slot = 0; 2743 2744 if (update_isize) { 2745 status = ocfs2_set_inode_size(handle, inode, di_bh, end); 2746 if (status) 2747 mlog_errno(status); 2748 } else 2749 ocfs2_journal_dirty(handle, di_bh); 2750 2751 bail_commit: 2752 ocfs2_commit_trans(osb, handle); 2753 2754 bail_unlock_orphan: 2755 ocfs2_inode_unlock(orphan_dir_inode, 1); 2756 inode_unlock(orphan_dir_inode); 2757 brelse(orphan_dir_bh); 2758 iput(orphan_dir_inode); 2759 2760 bail: 2761 return status; 2762 } 2763 2764 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2765 struct inode *inode, 2766 struct dentry *dentry) 2767 { 2768 int status = 0; 2769 struct buffer_head *parent_di_bh = NULL; 2770 handle_t *handle = NULL; 2771 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2772 struct ocfs2_dinode *dir_di, *di; 2773 struct inode *orphan_dir_inode = NULL; 2774 struct buffer_head *orphan_dir_bh = NULL; 2775 struct buffer_head *di_bh = NULL; 2776 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2777 2778 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, 2779 dentry->d_name.len, dentry->d_name.name, 2780 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2781 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2782 2783 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2784 if (status < 0) { 2785 if (status != -ENOENT) 2786 mlog_errno(status); 2787 return status; 2788 } 2789 2790 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2791 if (!dir_di->i_links_count) { 2792 /* can't make a file in a deleted directory. */ 2793 status = -ENOENT; 2794 goto leave; 2795 } 2796 2797 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2798 dentry->d_name.len); 2799 if (status) 2800 goto leave; 2801 2802 /* get a spot inside the dir. */ 2803 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2804 dentry->d_name.name, 2805 dentry->d_name.len, &lookup); 2806 if (status < 0) { 2807 mlog_errno(status); 2808 goto leave; 2809 } 2810 2811 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2812 ORPHAN_DIR_SYSTEM_INODE, 2813 osb->slot_num); 2814 if (!orphan_dir_inode) { 2815 status = -ENOENT; 2816 mlog_errno(status); 2817 goto leave; 2818 } 2819 2820 inode_lock(orphan_dir_inode); 2821 2822 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2823 if (status < 0) { 2824 mlog_errno(status); 2825 inode_unlock(orphan_dir_inode); 2826 iput(orphan_dir_inode); 2827 goto leave; 2828 } 2829 2830 status = ocfs2_read_inode_block(inode, &di_bh); 2831 if (status < 0) { 2832 mlog_errno(status); 2833 goto orphan_unlock; 2834 } 2835 2836 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2837 if (IS_ERR(handle)) { 2838 status = PTR_ERR(handle); 2839 handle = NULL; 2840 mlog_errno(status); 2841 goto orphan_unlock; 2842 } 2843 2844 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2845 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2846 if (status < 0) { 2847 mlog_errno(status); 2848 goto out_commit; 2849 } 2850 2851 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2852 orphan_dir_bh, false); 2853 if (status < 0) { 2854 mlog_errno(status); 2855 goto out_commit; 2856 } 2857 2858 di = (struct ocfs2_dinode *)di_bh->b_data; 2859 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); 2860 di->i_orphaned_slot = 0; 2861 set_nlink(inode, 1); 2862 ocfs2_set_links_count(di, inode->i_nlink); 2863 ocfs2_update_inode_fsync_trans(handle, inode, 1); 2864 ocfs2_journal_dirty(handle, di_bh); 2865 2866 status = ocfs2_add_entry(handle, dentry, inode, 2867 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2868 &lookup); 2869 if (status < 0) { 2870 mlog_errno(status); 2871 goto out_commit; 2872 } 2873 2874 status = ocfs2_dentry_attach_lock(dentry, inode, 2875 OCFS2_I(dir)->ip_blkno); 2876 if (status) { 2877 mlog_errno(status); 2878 goto out_commit; 2879 } 2880 2881 d_instantiate(dentry, inode); 2882 status = 0; 2883 out_commit: 2884 ocfs2_commit_trans(osb, handle); 2885 orphan_unlock: 2886 ocfs2_inode_unlock(orphan_dir_inode, 1); 2887 inode_unlock(orphan_dir_inode); 2888 iput(orphan_dir_inode); 2889 leave: 2890 2891 ocfs2_inode_unlock(dir, 1); 2892 2893 brelse(di_bh); 2894 brelse(parent_di_bh); 2895 brelse(orphan_dir_bh); 2896 2897 ocfs2_free_dir_lookup_result(&lookup); 2898 2899 if (status) 2900 mlog_errno(status); 2901 2902 return status; 2903 } 2904 2905 const struct inode_operations ocfs2_dir_iops = { 2906 .create = ocfs2_create, 2907 .lookup = ocfs2_lookup, 2908 .link = ocfs2_link, 2909 .unlink = ocfs2_unlink, 2910 .rmdir = ocfs2_unlink, 2911 .symlink = ocfs2_symlink, 2912 .mkdir = ocfs2_mkdir, 2913 .mknod = ocfs2_mknod, 2914 .rename = ocfs2_rename, 2915 .setattr = ocfs2_setattr, 2916 .getattr = ocfs2_getattr, 2917 .permission = ocfs2_permission, 2918 .listxattr = ocfs2_listxattr, 2919 .fiemap = ocfs2_fiemap, 2920 .get_acl = ocfs2_iop_get_acl, 2921 .set_acl = ocfs2_iop_set_acl, 2922 .fileattr_get = ocfs2_fileattr_get, 2923 .fileattr_set = ocfs2_fileattr_set, 2924 }; 2925