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(&init_user_ns, 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 user_namespace *mnt_userns, 225 struct inode *dir, 226 struct dentry *dentry, 227 umode_t mode, 228 dev_t dev) 229 { 230 int status = 0; 231 struct buffer_head *parent_fe_bh = NULL; 232 handle_t *handle = NULL; 233 struct ocfs2_super *osb; 234 struct ocfs2_dinode *dirfe; 235 struct buffer_head *new_fe_bh = NULL; 236 struct inode *inode = NULL; 237 struct ocfs2_alloc_context *inode_ac = NULL; 238 struct ocfs2_alloc_context *data_ac = NULL; 239 struct ocfs2_alloc_context *meta_ac = NULL; 240 int want_clusters = 0; 241 int want_meta = 0; 242 int xattr_credits = 0; 243 struct ocfs2_security_xattr_info si = { 244 .enable = 1, 245 }; 246 int did_quota_inode = 0; 247 struct ocfs2_dir_lookup_result lookup = { NULL, }; 248 sigset_t oldset; 249 int did_block_signals = 0; 250 struct ocfs2_dentry_lock *dl = NULL; 251 252 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name, 253 (unsigned long long)OCFS2_I(dir)->ip_blkno, 254 (unsigned long)dev, mode); 255 256 status = dquot_initialize(dir); 257 if (status) { 258 mlog_errno(status); 259 return status; 260 } 261 262 /* get our super block */ 263 osb = OCFS2_SB(dir->i_sb); 264 265 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 266 if (status < 0) { 267 if (status != -ENOENT) 268 mlog_errno(status); 269 return status; 270 } 271 272 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) { 273 status = -EMLINK; 274 goto leave; 275 } 276 277 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 278 if (!ocfs2_read_links_count(dirfe)) { 279 /* can't make a file in a deleted directory. */ 280 status = -ENOENT; 281 goto leave; 282 } 283 284 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 285 dentry->d_name.len); 286 if (status) 287 goto leave; 288 289 /* get a spot inside the dir. */ 290 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 291 dentry->d_name.name, 292 dentry->d_name.len, &lookup); 293 if (status < 0) { 294 mlog_errno(status); 295 goto leave; 296 } 297 298 /* reserve an inode spot */ 299 status = ocfs2_reserve_new_inode(osb, &inode_ac); 300 if (status < 0) { 301 if (status != -ENOSPC) 302 mlog_errno(status); 303 goto leave; 304 } 305 306 inode = ocfs2_get_init_inode(dir, mode); 307 if (IS_ERR(inode)) { 308 status = PTR_ERR(inode); 309 inode = NULL; 310 mlog_errno(status); 311 goto leave; 312 } 313 314 /* get security xattr */ 315 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 316 if (status) { 317 if (status == -EOPNOTSUPP) 318 si.enable = 0; 319 else { 320 mlog_errno(status); 321 goto leave; 322 } 323 } 324 325 /* calculate meta data/clusters for setting security and acl xattr */ 326 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode, 327 &si, &want_clusters, 328 &xattr_credits, &want_meta); 329 if (status < 0) { 330 mlog_errno(status); 331 goto leave; 332 } 333 334 /* Reserve a cluster if creating an extent based directory. */ 335 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { 336 want_clusters += 1; 337 338 /* Dir indexing requires extra space as well */ 339 if (ocfs2_supports_indexed_dirs(osb)) 340 want_meta++; 341 } 342 343 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac); 344 if (status < 0) { 345 if (status != -ENOSPC) 346 mlog_errno(status); 347 goto leave; 348 } 349 350 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 351 if (status < 0) { 352 if (status != -ENOSPC) 353 mlog_errno(status); 354 goto leave; 355 } 356 357 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 358 S_ISDIR(mode), 359 xattr_credits)); 360 if (IS_ERR(handle)) { 361 status = PTR_ERR(handle); 362 handle = NULL; 363 mlog_errno(status); 364 goto leave; 365 } 366 367 /* Starting to change things, restart is no longer possible. */ 368 ocfs2_block_signals(&oldset); 369 did_block_signals = 1; 370 371 status = dquot_alloc_inode(inode); 372 if (status) 373 goto leave; 374 did_quota_inode = 1; 375 376 /* do the real work now. */ 377 status = ocfs2_mknod_locked(osb, dir, inode, dev, 378 &new_fe_bh, parent_fe_bh, handle, 379 inode_ac); 380 if (status < 0) { 381 mlog_errno(status); 382 goto leave; 383 } 384 385 if (S_ISDIR(mode)) { 386 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 387 new_fe_bh, data_ac, meta_ac); 388 if (status < 0) { 389 mlog_errno(status); 390 goto leave; 391 } 392 393 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir), 394 parent_fe_bh, 395 OCFS2_JOURNAL_ACCESS_WRITE); 396 if (status < 0) { 397 mlog_errno(status); 398 goto leave; 399 } 400 ocfs2_add_links_count(dirfe, 1); 401 ocfs2_journal_dirty(handle, parent_fe_bh); 402 inc_nlink(dir); 403 } 404 405 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh, 406 meta_ac, data_ac); 407 408 if (status < 0) { 409 mlog_errno(status); 410 goto roll_back; 411 } 412 413 if (si.enable) { 414 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 415 meta_ac, data_ac); 416 if (status < 0) { 417 mlog_errno(status); 418 goto roll_back; 419 } 420 } 421 422 /* 423 * Do this before adding the entry to the directory. We add 424 * also set d_op after success so that ->d_iput() will cleanup 425 * the dentry lock even if ocfs2_add_entry() fails below. 426 */ 427 status = ocfs2_dentry_attach_lock(dentry, inode, 428 OCFS2_I(dir)->ip_blkno); 429 if (status) { 430 mlog_errno(status); 431 goto roll_back; 432 } 433 434 dl = dentry->d_fsdata; 435 436 status = ocfs2_add_entry(handle, dentry, inode, 437 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 438 &lookup); 439 if (status < 0) { 440 mlog_errno(status); 441 goto roll_back; 442 } 443 444 insert_inode_hash(inode); 445 d_instantiate(dentry, inode); 446 status = 0; 447 448 roll_back: 449 if (status < 0 && S_ISDIR(mode)) { 450 ocfs2_add_links_count(dirfe, -1); 451 drop_nlink(dir); 452 } 453 454 leave: 455 if (status < 0 && did_quota_inode) 456 dquot_free_inode(inode); 457 if (handle) 458 ocfs2_commit_trans(osb, handle); 459 460 ocfs2_inode_unlock(dir, 1); 461 if (did_block_signals) 462 ocfs2_unblock_signals(&oldset); 463 464 brelse(new_fe_bh); 465 brelse(parent_fe_bh); 466 kfree(si.value); 467 468 ocfs2_free_dir_lookup_result(&lookup); 469 470 if (inode_ac) 471 ocfs2_free_alloc_context(inode_ac); 472 473 if (data_ac) 474 ocfs2_free_alloc_context(data_ac); 475 476 if (meta_ac) 477 ocfs2_free_alloc_context(meta_ac); 478 479 /* 480 * We should call iput after the i_mutex of the bitmap been 481 * unlocked in ocfs2_free_alloc_context, or the 482 * ocfs2_delete_inode will mutex_lock again. 483 */ 484 if ((status < 0) && inode) { 485 if (dl) 486 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 487 488 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 489 clear_nlink(inode); 490 iput(inode); 491 } 492 493 if (status) 494 mlog_errno(status); 495 496 return status; 497 } 498 499 static int __ocfs2_mknod_locked(struct inode *dir, 500 struct inode *inode, 501 dev_t dev, 502 struct buffer_head **new_fe_bh, 503 struct buffer_head *parent_fe_bh, 504 handle_t *handle, 505 struct ocfs2_alloc_context *inode_ac, 506 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit) 507 { 508 int status = 0; 509 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 510 struct ocfs2_dinode *fe = NULL; 511 struct ocfs2_extent_list *fel; 512 u16 feat; 513 struct ocfs2_inode_info *oi = OCFS2_I(inode); 514 struct timespec64 ts; 515 516 *new_fe_bh = NULL; 517 518 /* populate as many fields early on as possible - many of 519 * these are used by the support functions here and in 520 * callers. */ 521 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 522 oi->ip_blkno = fe_blkno; 523 spin_lock(&osb->osb_lock); 524 inode->i_generation = osb->s_next_generation++; 525 spin_unlock(&osb->osb_lock); 526 527 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 528 if (!*new_fe_bh) { 529 status = -ENOMEM; 530 mlog_errno(status); 531 goto leave; 532 } 533 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh); 534 535 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 536 *new_fe_bh, 537 OCFS2_JOURNAL_ACCESS_CREATE); 538 if (status < 0) { 539 mlog_errno(status); 540 goto leave; 541 } 542 543 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 544 memset(fe, 0, osb->sb->s_blocksize); 545 546 fe->i_generation = cpu_to_le32(inode->i_generation); 547 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 548 fe->i_blkno = cpu_to_le64(fe_blkno); 549 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc); 550 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 551 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); 552 fe->i_uid = cpu_to_le32(i_uid_read(inode)); 553 fe->i_gid = cpu_to_le32(i_gid_read(inode)); 554 fe->i_mode = cpu_to_le16(inode->i_mode); 555 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 556 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 557 558 ocfs2_set_links_count(fe, inode->i_nlink); 559 560 fe->i_last_eb_blk = 0; 561 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 562 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL); 563 ktime_get_real_ts64(&ts); 564 fe->i_atime = fe->i_ctime = fe->i_mtime = 565 cpu_to_le64(ts.tv_sec); 566 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 567 cpu_to_le32(ts.tv_nsec); 568 fe->i_dtime = 0; 569 570 /* 571 * If supported, directories start with inline data. If inline 572 * isn't supported, but indexing is, we start them as indexed. 573 */ 574 feat = le16_to_cpu(fe->i_dyn_features); 575 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) { 576 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); 577 578 fe->id2.i_data.id_count = cpu_to_le16( 579 ocfs2_max_inline_data_with_xattr(osb->sb, fe)); 580 } else { 581 fel = &fe->id2.i_list; 582 fel->l_tree_depth = 0; 583 fel->l_next_free_rec = 0; 584 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 585 } 586 587 ocfs2_journal_dirty(handle, *new_fe_bh); 588 589 ocfs2_populate_inode(inode, fe, 1); 590 ocfs2_ci_set_new(osb, INODE_CACHE(inode)); 591 if (!ocfs2_mount_local(osb)) { 592 status = ocfs2_create_new_inode_locks(inode); 593 if (status < 0) 594 mlog_errno(status); 595 } 596 597 ocfs2_update_inode_fsync_trans(handle, inode, 1); 598 599 leave: 600 if (status < 0) { 601 if (*new_fe_bh) { 602 brelse(*new_fe_bh); 603 *new_fe_bh = NULL; 604 } 605 } 606 607 if (status) 608 mlog_errno(status); 609 return status; 610 } 611 612 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 613 struct inode *dir, 614 struct inode *inode, 615 dev_t dev, 616 struct buffer_head **new_fe_bh, 617 struct buffer_head *parent_fe_bh, 618 handle_t *handle, 619 struct ocfs2_alloc_context *inode_ac) 620 { 621 int status = 0; 622 u64 suballoc_loc, fe_blkno = 0; 623 u16 suballoc_bit; 624 625 *new_fe_bh = NULL; 626 627 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh, 628 inode_ac, &suballoc_loc, 629 &suballoc_bit, &fe_blkno); 630 if (status < 0) { 631 mlog_errno(status); 632 return status; 633 } 634 635 status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, 636 parent_fe_bh, handle, inode_ac, 637 fe_blkno, suballoc_loc, suballoc_bit); 638 if (status < 0) { 639 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit); 640 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode, 641 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1); 642 if (tmp) 643 mlog_errno(tmp); 644 } 645 646 return status; 647 } 648 649 static int ocfs2_mkdir(struct user_namespace *mnt_userns, 650 struct inode *dir, 651 struct dentry *dentry, 652 umode_t mode) 653 { 654 int ret; 655 656 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, 657 OCFS2_I(dir)->ip_blkno, mode); 658 ret = ocfs2_mknod(&init_user_ns, dir, dentry, mode | S_IFDIR, 0); 659 if (ret) 660 mlog_errno(ret); 661 662 return ret; 663 } 664 665 static int ocfs2_create(struct user_namespace *mnt_userns, 666 struct inode *dir, 667 struct dentry *dentry, 668 umode_t mode, 669 bool excl) 670 { 671 int ret; 672 673 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name, 674 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode); 675 ret = ocfs2_mknod(&init_user_ns, dir, dentry, mode | S_IFREG, 0); 676 if (ret) 677 mlog_errno(ret); 678 679 return ret; 680 } 681 682 static int ocfs2_link(struct dentry *old_dentry, 683 struct inode *dir, 684 struct dentry *dentry) 685 { 686 handle_t *handle; 687 struct inode *inode = d_inode(old_dentry); 688 struct inode *old_dir = d_inode(old_dentry->d_parent); 689 int err; 690 struct buffer_head *fe_bh = NULL; 691 struct buffer_head *old_dir_bh = NULL; 692 struct buffer_head *parent_fe_bh = NULL; 693 struct ocfs2_dinode *fe = NULL; 694 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 695 struct ocfs2_dir_lookup_result lookup = { NULL, }; 696 sigset_t oldset; 697 u64 old_de_ino; 698 699 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno, 700 old_dentry->d_name.len, old_dentry->d_name.name, 701 dentry->d_name.len, dentry->d_name.name); 702 703 if (S_ISDIR(inode->i_mode)) 704 return -EPERM; 705 706 err = dquot_initialize(dir); 707 if (err) { 708 mlog_errno(err); 709 return err; 710 } 711 712 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 713 &parent_fe_bh, dir, 0); 714 if (err < 0) { 715 if (err != -ENOENT) 716 mlog_errno(err); 717 return err; 718 } 719 720 /* make sure both dirs have bhs 721 * get an extra ref on old_dir_bh if old==new */ 722 if (!parent_fe_bh) { 723 if (old_dir_bh) { 724 parent_fe_bh = old_dir_bh; 725 get_bh(parent_fe_bh); 726 } else { 727 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str); 728 err = -EIO; 729 goto out; 730 } 731 } 732 733 if (!dir->i_nlink) { 734 err = -ENOENT; 735 goto out; 736 } 737 738 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 739 old_dentry->d_name.len, &old_de_ino); 740 if (err) { 741 err = -ENOENT; 742 goto out; 743 } 744 745 /* 746 * Check whether another node removed the source inode while we 747 * were in the vfs. 748 */ 749 if (old_de_ino != OCFS2_I(inode)->ip_blkno) { 750 err = -ENOENT; 751 goto out; 752 } 753 754 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 755 dentry->d_name.len); 756 if (err) 757 goto out; 758 759 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 760 dentry->d_name.name, 761 dentry->d_name.len, &lookup); 762 if (err < 0) { 763 mlog_errno(err); 764 goto out; 765 } 766 767 err = ocfs2_inode_lock(inode, &fe_bh, 1); 768 if (err < 0) { 769 if (err != -ENOENT) 770 mlog_errno(err); 771 goto out; 772 } 773 774 fe = (struct ocfs2_dinode *) fe_bh->b_data; 775 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { 776 err = -EMLINK; 777 goto out_unlock_inode; 778 } 779 780 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); 781 if (IS_ERR(handle)) { 782 err = PTR_ERR(handle); 783 handle = NULL; 784 mlog_errno(err); 785 goto out_unlock_inode; 786 } 787 788 /* Starting to change things, restart is no longer possible. */ 789 ocfs2_block_signals(&oldset); 790 791 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 792 OCFS2_JOURNAL_ACCESS_WRITE); 793 if (err < 0) { 794 mlog_errno(err); 795 goto out_commit; 796 } 797 798 inc_nlink(inode); 799 inode->i_ctime = current_time(inode); 800 ocfs2_set_links_count(fe, inode->i_nlink); 801 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 802 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 803 ocfs2_journal_dirty(handle, fe_bh); 804 805 err = ocfs2_add_entry(handle, dentry, inode, 806 OCFS2_I(inode)->ip_blkno, 807 parent_fe_bh, &lookup); 808 if (err) { 809 ocfs2_add_links_count(fe, -1); 810 drop_nlink(inode); 811 mlog_errno(err); 812 goto out_commit; 813 } 814 815 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 816 if (err) { 817 mlog_errno(err); 818 goto out_commit; 819 } 820 821 ihold(inode); 822 d_instantiate(dentry, inode); 823 824 out_commit: 825 ocfs2_commit_trans(osb, handle); 826 ocfs2_unblock_signals(&oldset); 827 out_unlock_inode: 828 ocfs2_inode_unlock(inode, 1); 829 830 out: 831 ocfs2_double_unlock(old_dir, dir); 832 833 brelse(fe_bh); 834 brelse(parent_fe_bh); 835 brelse(old_dir_bh); 836 837 ocfs2_free_dir_lookup_result(&lookup); 838 839 if (err) 840 mlog_errno(err); 841 842 return err; 843 } 844 845 /* 846 * Takes and drops an exclusive lock on the given dentry. This will 847 * force other nodes to drop it. 848 */ 849 static int ocfs2_remote_dentry_delete(struct dentry *dentry) 850 { 851 int ret; 852 853 ret = ocfs2_dentry_lock(dentry, 1); 854 if (ret) 855 mlog_errno(ret); 856 else 857 ocfs2_dentry_unlock(dentry, 1); 858 859 return ret; 860 } 861 862 static inline int ocfs2_inode_is_unlinkable(struct inode *inode) 863 { 864 if (S_ISDIR(inode->i_mode)) { 865 if (inode->i_nlink == 2) 866 return 1; 867 return 0; 868 } 869 870 if (inode->i_nlink == 1) 871 return 1; 872 return 0; 873 } 874 875 static int ocfs2_unlink(struct inode *dir, 876 struct dentry *dentry) 877 { 878 int status; 879 int child_locked = 0; 880 bool is_unlinkable = false; 881 struct inode *inode = d_inode(dentry); 882 struct inode *orphan_dir = NULL; 883 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 884 u64 blkno; 885 struct ocfs2_dinode *fe = NULL; 886 struct buffer_head *fe_bh = NULL; 887 struct buffer_head *parent_node_bh = NULL; 888 handle_t *handle = NULL; 889 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 890 struct ocfs2_dir_lookup_result lookup = { NULL, }; 891 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 892 893 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, 894 dentry->d_name.name, 895 (unsigned long long)OCFS2_I(dir)->ip_blkno, 896 (unsigned long long)OCFS2_I(inode)->ip_blkno); 897 898 status = dquot_initialize(dir); 899 if (status) { 900 mlog_errno(status); 901 return status; 902 } 903 904 BUG_ON(d_inode(dentry->d_parent) != dir); 905 906 if (inode == osb->root_inode) 907 return -EPERM; 908 909 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 910 OI_LS_PARENT); 911 if (status < 0) { 912 if (status != -ENOENT) 913 mlog_errno(status); 914 return status; 915 } 916 917 status = ocfs2_find_files_on_disk(dentry->d_name.name, 918 dentry->d_name.len, &blkno, dir, 919 &lookup); 920 if (status < 0) { 921 if (status != -ENOENT) 922 mlog_errno(status); 923 goto leave; 924 } 925 926 if (OCFS2_I(inode)->ip_blkno != blkno) { 927 status = -ENOENT; 928 929 trace_ocfs2_unlink_noent( 930 (unsigned long long)OCFS2_I(inode)->ip_blkno, 931 (unsigned long long)blkno, 932 OCFS2_I(inode)->ip_flags); 933 goto leave; 934 } 935 936 status = ocfs2_inode_lock(inode, &fe_bh, 1); 937 if (status < 0) { 938 if (status != -ENOENT) 939 mlog_errno(status); 940 goto leave; 941 } 942 child_locked = 1; 943 944 if (S_ISDIR(inode->i_mode)) { 945 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 946 status = -ENOTEMPTY; 947 goto leave; 948 } 949 } 950 951 status = ocfs2_remote_dentry_delete(dentry); 952 if (status < 0) { 953 /* This remote delete should succeed under all normal 954 * circumstances. */ 955 mlog_errno(status); 956 goto leave; 957 } 958 959 if (ocfs2_inode_is_unlinkable(inode)) { 960 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 961 OCFS2_I(inode)->ip_blkno, 962 orphan_name, &orphan_insert, 963 false); 964 if (status < 0) { 965 mlog_errno(status); 966 goto leave; 967 } 968 is_unlinkable = true; 969 } 970 971 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 972 if (IS_ERR(handle)) { 973 status = PTR_ERR(handle); 974 handle = NULL; 975 mlog_errno(status); 976 goto leave; 977 } 978 979 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 980 OCFS2_JOURNAL_ACCESS_WRITE); 981 if (status < 0) { 982 mlog_errno(status); 983 goto leave; 984 } 985 986 fe = (struct ocfs2_dinode *) fe_bh->b_data; 987 988 /* delete the name from the parent dir */ 989 status = ocfs2_delete_entry(handle, dir, &lookup); 990 if (status < 0) { 991 mlog_errno(status); 992 goto leave; 993 } 994 995 if (S_ISDIR(inode->i_mode)) 996 drop_nlink(inode); 997 drop_nlink(inode); 998 ocfs2_set_links_count(fe, inode->i_nlink); 999 ocfs2_journal_dirty(handle, fe_bh); 1000 1001 dir->i_ctime = dir->i_mtime = current_time(dir); 1002 if (S_ISDIR(inode->i_mode)) 1003 drop_nlink(dir); 1004 1005 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 1006 if (status < 0) { 1007 mlog_errno(status); 1008 if (S_ISDIR(inode->i_mode)) 1009 inc_nlink(dir); 1010 goto leave; 1011 } 1012 1013 if (is_unlinkable) { 1014 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, 1015 orphan_name, &orphan_insert, orphan_dir, false); 1016 if (status < 0) 1017 mlog_errno(status); 1018 } 1019 1020 leave: 1021 if (handle) 1022 ocfs2_commit_trans(osb, handle); 1023 1024 if (orphan_dir) { 1025 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1026 ocfs2_inode_unlock(orphan_dir, 1); 1027 inode_unlock(orphan_dir); 1028 iput(orphan_dir); 1029 } 1030 1031 if (child_locked) 1032 ocfs2_inode_unlock(inode, 1); 1033 1034 ocfs2_inode_unlock(dir, 1); 1035 1036 brelse(fe_bh); 1037 brelse(parent_node_bh); 1038 1039 ocfs2_free_dir_lookup_result(&orphan_insert); 1040 ocfs2_free_dir_lookup_result(&lookup); 1041 1042 if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) 1043 mlog_errno(status); 1044 1045 return status; 1046 } 1047 1048 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, 1049 u64 src_inode_no, u64 dest_inode_no) 1050 { 1051 int ret = 0, i = 0; 1052 u64 parent_inode_no = 0; 1053 u64 child_inode_no = src_inode_no; 1054 struct inode *child_inode; 1055 1056 #define MAX_LOOKUP_TIMES 32 1057 while (1) { 1058 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); 1059 if (IS_ERR(child_inode)) { 1060 ret = PTR_ERR(child_inode); 1061 break; 1062 } 1063 1064 ret = ocfs2_inode_lock(child_inode, NULL, 0); 1065 if (ret < 0) { 1066 iput(child_inode); 1067 if (ret != -ENOENT) 1068 mlog_errno(ret); 1069 break; 1070 } 1071 1072 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, 1073 &parent_inode_no); 1074 ocfs2_inode_unlock(child_inode, 0); 1075 iput(child_inode); 1076 if (ret < 0) { 1077 ret = -ENOENT; 1078 break; 1079 } 1080 1081 if (parent_inode_no == dest_inode_no) { 1082 ret = 1; 1083 break; 1084 } 1085 1086 if (parent_inode_no == osb->root_inode->i_ino) { 1087 ret = 0; 1088 break; 1089 } 1090 1091 child_inode_no = parent_inode_no; 1092 1093 if (++i >= MAX_LOOKUP_TIMES) { 1094 mlog_ratelimited(ML_NOTICE, "max lookup times reached, " 1095 "filesystem may have nested directories, " 1096 "src inode: %llu, dest inode: %llu.\n", 1097 (unsigned long long)src_inode_no, 1098 (unsigned long long)dest_inode_no); 1099 ret = 0; 1100 break; 1101 } 1102 } 1103 1104 return ret; 1105 } 1106 1107 /* 1108 * The only place this should be used is rename and link! 1109 * if they have the same id, then the 1st one is the only one locked. 1110 */ 1111 static int ocfs2_double_lock(struct ocfs2_super *osb, 1112 struct buffer_head **bh1, 1113 struct inode *inode1, 1114 struct buffer_head **bh2, 1115 struct inode *inode2, 1116 int rename) 1117 { 1118 int status; 1119 int inode1_is_ancestor, inode2_is_ancestor; 1120 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 1121 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 1122 1123 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 1124 (unsigned long long)oi2->ip_blkno); 1125 1126 if (*bh1) 1127 *bh1 = NULL; 1128 if (*bh2) 1129 *bh2 = NULL; 1130 1131 /* we always want to lock the one with the lower lockid first. 1132 * and if they are nested, we lock ancestor first */ 1133 if (oi1->ip_blkno != oi2->ip_blkno) { 1134 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, 1135 oi1->ip_blkno); 1136 if (inode1_is_ancestor < 0) { 1137 status = inode1_is_ancestor; 1138 goto bail; 1139 } 1140 1141 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, 1142 oi2->ip_blkno); 1143 if (inode2_is_ancestor < 0) { 1144 status = inode2_is_ancestor; 1145 goto bail; 1146 } 1147 1148 if ((inode1_is_ancestor == 1) || 1149 (oi1->ip_blkno < oi2->ip_blkno && 1150 inode2_is_ancestor == 0)) { 1151 /* switch id1 and id2 around */ 1152 swap(bh2, bh1); 1153 swap(inode2, inode1); 1154 } 1155 /* lock id2 */ 1156 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 1157 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); 1158 if (status < 0) { 1159 if (status != -ENOENT) 1160 mlog_errno(status); 1161 goto bail; 1162 } 1163 } 1164 1165 /* lock id1 */ 1166 status = ocfs2_inode_lock_nested(inode1, bh1, 1, 1167 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 1168 if (status < 0) { 1169 /* 1170 * An error return must mean that no cluster locks 1171 * were held on function exit. 1172 */ 1173 if (oi1->ip_blkno != oi2->ip_blkno) { 1174 ocfs2_inode_unlock(inode2, 1); 1175 brelse(*bh2); 1176 *bh2 = NULL; 1177 } 1178 1179 if (status != -ENOENT) 1180 mlog_errno(status); 1181 } 1182 1183 trace_ocfs2_double_lock_end( 1184 (unsigned long long)oi1->ip_blkno, 1185 (unsigned long long)oi2->ip_blkno); 1186 1187 bail: 1188 if (status) 1189 mlog_errno(status); 1190 return status; 1191 } 1192 1193 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1194 { 1195 ocfs2_inode_unlock(inode1, 1); 1196 1197 if (inode1 != inode2) 1198 ocfs2_inode_unlock(inode2, 1); 1199 } 1200 1201 static int ocfs2_rename(struct user_namespace *mnt_userns, 1202 struct inode *old_dir, 1203 struct dentry *old_dentry, 1204 struct inode *new_dir, 1205 struct dentry *new_dentry, 1206 unsigned int flags) 1207 { 1208 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1209 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1210 struct inode *old_inode = d_inode(old_dentry); 1211 struct inode *new_inode = d_inode(new_dentry); 1212 struct inode *orphan_dir = NULL; 1213 struct ocfs2_dinode *newfe = NULL; 1214 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1215 struct buffer_head *newfe_bh = NULL; 1216 struct buffer_head *old_inode_bh = NULL; 1217 struct ocfs2_super *osb = NULL; 1218 u64 newfe_blkno, old_de_ino; 1219 handle_t *handle = NULL; 1220 struct buffer_head *old_dir_bh = NULL; 1221 struct buffer_head *new_dir_bh = NULL; 1222 u32 old_dir_nlink = old_dir->i_nlink; 1223 struct ocfs2_dinode *old_di; 1224 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1225 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1226 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1227 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1228 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1229 bool should_add_orphan = false; 1230 1231 if (flags) 1232 return -EINVAL; 1233 1234 /* At some point it might be nice to break this function up a 1235 * bit. */ 1236 1237 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, 1238 old_dentry->d_name.len, old_dentry->d_name.name, 1239 new_dentry->d_name.len, new_dentry->d_name.name); 1240 1241 status = dquot_initialize(old_dir); 1242 if (status) { 1243 mlog_errno(status); 1244 goto bail; 1245 } 1246 status = dquot_initialize(new_dir); 1247 if (status) { 1248 mlog_errno(status); 1249 goto bail; 1250 } 1251 1252 osb = OCFS2_SB(old_dir->i_sb); 1253 1254 if (new_inode) { 1255 if (!igrab(new_inode)) 1256 BUG(); 1257 } 1258 1259 /* Assume a directory hierarchy thusly: 1260 * a/b/c 1261 * a/d 1262 * a,b,c, and d are all directories. 1263 * 1264 * from cwd of 'a' on both nodes: 1265 * node1: mv b/c d 1266 * node2: mv d b/c 1267 * 1268 * And that's why, just like the VFS, we need a file system 1269 * rename lock. */ 1270 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1271 status = ocfs2_rename_lock(osb); 1272 if (status < 0) { 1273 mlog_errno(status); 1274 goto bail; 1275 } 1276 rename_lock = 1; 1277 1278 /* here we cannot guarantee the inodes haven't just been 1279 * changed, so check if they are nested again */ 1280 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, 1281 old_inode->i_ino); 1282 if (status < 0) { 1283 mlog_errno(status); 1284 goto bail; 1285 } else if (status == 1) { 1286 status = -EPERM; 1287 trace_ocfs2_rename_not_permitted( 1288 (unsigned long long)old_inode->i_ino, 1289 (unsigned long long)new_dir->i_ino); 1290 goto bail; 1291 } 1292 } 1293 1294 /* if old and new are the same, this'll just do one lock. */ 1295 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1296 &new_dir_bh, new_dir, 1); 1297 if (status < 0) { 1298 mlog_errno(status); 1299 goto bail; 1300 } 1301 parents_locked = 1; 1302 1303 if (!new_dir->i_nlink) { 1304 status = -EACCES; 1305 goto bail; 1306 } 1307 1308 /* make sure both dirs have bhs 1309 * get an extra ref on old_dir_bh if old==new */ 1310 if (!new_dir_bh) { 1311 if (old_dir_bh) { 1312 new_dir_bh = old_dir_bh; 1313 get_bh(new_dir_bh); 1314 } else { 1315 mlog(ML_ERROR, "no old_dir_bh!\n"); 1316 status = -EIO; 1317 goto bail; 1318 } 1319 } 1320 1321 /* 1322 * Aside from allowing a meta data update, the locking here 1323 * also ensures that the downconvert thread on other nodes 1324 * won't have to concurrently downconvert the inode and the 1325 * dentry locks. 1326 */ 1327 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1328 OI_LS_PARENT); 1329 if (status < 0) { 1330 if (status != -ENOENT) 1331 mlog_errno(status); 1332 goto bail; 1333 } 1334 old_child_locked = 1; 1335 1336 status = ocfs2_remote_dentry_delete(old_dentry); 1337 if (status < 0) { 1338 mlog_errno(status); 1339 goto bail; 1340 } 1341 1342 if (S_ISDIR(old_inode->i_mode)) { 1343 u64 old_inode_parent; 1344 1345 update_dot_dot = 1; 1346 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1347 old_inode, 1348 &old_inode_dot_dot_res); 1349 if (status) { 1350 status = -EIO; 1351 goto bail; 1352 } 1353 1354 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1355 status = -EIO; 1356 goto bail; 1357 } 1358 1359 if (!new_inode && new_dir != old_dir && 1360 new_dir->i_nlink >= ocfs2_link_max(osb)) { 1361 status = -EMLINK; 1362 goto bail; 1363 } 1364 } 1365 1366 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1367 old_dentry->d_name.len, 1368 &old_de_ino); 1369 if (status) { 1370 status = -ENOENT; 1371 goto bail; 1372 } 1373 1374 /* 1375 * Check for inode number is _not_ due to possible IO errors. 1376 * We might rmdir the source, keep it as pwd of some process 1377 * and merrily kill the link to whatever was created under the 1378 * same name. Goodbye sticky bit ;-< 1379 */ 1380 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1381 status = -ENOENT; 1382 goto bail; 1383 } 1384 1385 /* check if the target already exists (in which case we need 1386 * to delete it */ 1387 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1388 new_dentry->d_name.len, 1389 &newfe_blkno, new_dir, 1390 &target_lookup_res); 1391 /* The only error we allow here is -ENOENT because the new 1392 * file not existing is perfectly valid. */ 1393 if ((status < 0) && (status != -ENOENT)) { 1394 /* If we cannot find the file specified we should just */ 1395 /* return the error... */ 1396 mlog_errno(status); 1397 goto bail; 1398 } 1399 if (status == 0) 1400 target_exists = 1; 1401 1402 if (!target_exists && new_inode) { 1403 /* 1404 * Target was unlinked by another node while we were 1405 * waiting to get to ocfs2_rename(). There isn't 1406 * anything we can do here to help the situation, so 1407 * bubble up the appropriate error. 1408 */ 1409 status = -ENOENT; 1410 goto bail; 1411 } 1412 1413 /* In case we need to overwrite an existing file, we blow it 1414 * away first */ 1415 if (target_exists) { 1416 /* VFS didn't think there existed an inode here, but 1417 * someone else in the cluster must have raced our 1418 * rename to create one. Today we error cleanly, in 1419 * the future we should consider calling iget to build 1420 * a new struct inode for this entry. */ 1421 if (!new_inode) { 1422 status = -EACCES; 1423 1424 trace_ocfs2_rename_target_exists(new_dentry->d_name.len, 1425 new_dentry->d_name.name); 1426 goto bail; 1427 } 1428 1429 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1430 status = -EACCES; 1431 1432 trace_ocfs2_rename_disagree( 1433 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1434 (unsigned long long)newfe_blkno, 1435 OCFS2_I(new_inode)->ip_flags); 1436 goto bail; 1437 } 1438 1439 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1440 if (status < 0) { 1441 if (status != -ENOENT) 1442 mlog_errno(status); 1443 goto bail; 1444 } 1445 new_child_locked = 1; 1446 1447 status = ocfs2_remote_dentry_delete(new_dentry); 1448 if (status < 0) { 1449 mlog_errno(status); 1450 goto bail; 1451 } 1452 1453 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1454 1455 trace_ocfs2_rename_over_existing( 1456 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1457 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1458 1459 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1460 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1461 OCFS2_I(new_inode)->ip_blkno, 1462 orphan_name, &orphan_insert, 1463 false); 1464 if (status < 0) { 1465 mlog_errno(status); 1466 goto bail; 1467 } 1468 should_add_orphan = true; 1469 } 1470 } else { 1471 BUG_ON(d_inode(new_dentry->d_parent) != new_dir); 1472 1473 status = ocfs2_check_dir_for_entry(new_dir, 1474 new_dentry->d_name.name, 1475 new_dentry->d_name.len); 1476 if (status) 1477 goto bail; 1478 1479 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1480 new_dentry->d_name.name, 1481 new_dentry->d_name.len, 1482 &target_insert); 1483 if (status < 0) { 1484 mlog_errno(status); 1485 goto bail; 1486 } 1487 } 1488 1489 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1490 if (IS_ERR(handle)) { 1491 status = PTR_ERR(handle); 1492 handle = NULL; 1493 mlog_errno(status); 1494 goto bail; 1495 } 1496 1497 if (target_exists) { 1498 if (S_ISDIR(new_inode->i_mode)) { 1499 if (new_inode->i_nlink != 2 || 1500 !ocfs2_empty_dir(new_inode)) { 1501 status = -ENOTEMPTY; 1502 goto bail; 1503 } 1504 } 1505 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1506 newfe_bh, 1507 OCFS2_JOURNAL_ACCESS_WRITE); 1508 if (status < 0) { 1509 mlog_errno(status); 1510 goto bail; 1511 } 1512 1513 /* change the dirent to point to the correct inode */ 1514 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1515 old_inode); 1516 if (status < 0) { 1517 mlog_errno(status); 1518 goto bail; 1519 } 1520 inode_inc_iversion(new_dir); 1521 1522 if (S_ISDIR(new_inode->i_mode)) 1523 ocfs2_set_links_count(newfe, 0); 1524 else 1525 ocfs2_add_links_count(newfe, -1); 1526 ocfs2_journal_dirty(handle, newfe_bh); 1527 if (should_add_orphan) { 1528 status = ocfs2_orphan_add(osb, handle, new_inode, 1529 newfe_bh, orphan_name, 1530 &orphan_insert, orphan_dir, false); 1531 if (status < 0) { 1532 mlog_errno(status); 1533 goto bail; 1534 } 1535 } 1536 } else { 1537 /* if the name was not found in new_dir, add it now */ 1538 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1539 OCFS2_I(old_inode)->ip_blkno, 1540 new_dir_bh, &target_insert); 1541 } 1542 1543 old_inode->i_ctime = current_time(old_inode); 1544 mark_inode_dirty(old_inode); 1545 1546 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1547 old_inode_bh, 1548 OCFS2_JOURNAL_ACCESS_WRITE); 1549 if (status >= 0) { 1550 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1551 1552 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); 1553 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); 1554 ocfs2_journal_dirty(handle, old_inode_bh); 1555 } else 1556 mlog_errno(status); 1557 1558 /* 1559 * Now that the name has been added to new_dir, remove the old name. 1560 * 1561 * We don't keep any directory entry context around until now 1562 * because the insert might have changed the type of directory 1563 * we're dealing with. 1564 */ 1565 status = ocfs2_find_entry(old_dentry->d_name.name, 1566 old_dentry->d_name.len, old_dir, 1567 &old_entry_lookup); 1568 if (status) { 1569 if (!is_journal_aborted(osb->journal->j_journal)) { 1570 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1571 "is not deleted.", 1572 new_dentry->d_name.len, new_dentry->d_name.name, 1573 old_dentry->d_name.len, old_dentry->d_name.name); 1574 } 1575 goto bail; 1576 } 1577 1578 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1579 if (status < 0) { 1580 mlog_errno(status); 1581 if (!is_journal_aborted(osb->journal->j_journal)) { 1582 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1583 "is not deleted.", 1584 new_dentry->d_name.len, new_dentry->d_name.name, 1585 old_dentry->d_name.len, old_dentry->d_name.name); 1586 } 1587 goto bail; 1588 } 1589 1590 if (new_inode) { 1591 drop_nlink(new_inode); 1592 new_inode->i_ctime = current_time(new_inode); 1593 } 1594 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir); 1595 1596 if (update_dot_dot) { 1597 status = ocfs2_update_entry(old_inode, handle, 1598 &old_inode_dot_dot_res, new_dir); 1599 drop_nlink(old_dir); 1600 if (new_inode) { 1601 drop_nlink(new_inode); 1602 } else { 1603 inc_nlink(new_dir); 1604 mark_inode_dirty(new_dir); 1605 } 1606 } 1607 mark_inode_dirty(old_dir); 1608 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1609 if (new_inode) { 1610 mark_inode_dirty(new_inode); 1611 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1612 } 1613 1614 if (old_dir != new_dir) { 1615 /* Keep the same times on both directories.*/ 1616 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; 1617 1618 /* 1619 * This will also pick up the i_nlink change from the 1620 * block above. 1621 */ 1622 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1623 } 1624 1625 if (old_dir_nlink != old_dir->i_nlink) { 1626 if (!old_dir_bh) { 1627 mlog(ML_ERROR, "need to change nlink for old dir " 1628 "%llu from %d to %d but bh is NULL!\n", 1629 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1630 (int)old_dir_nlink, old_dir->i_nlink); 1631 } else { 1632 struct ocfs2_dinode *fe; 1633 status = ocfs2_journal_access_di(handle, 1634 INODE_CACHE(old_dir), 1635 old_dir_bh, 1636 OCFS2_JOURNAL_ACCESS_WRITE); 1637 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1638 ocfs2_set_links_count(fe, old_dir->i_nlink); 1639 ocfs2_journal_dirty(handle, old_dir_bh); 1640 } 1641 } 1642 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1643 status = 0; 1644 bail: 1645 if (handle) 1646 ocfs2_commit_trans(osb, handle); 1647 1648 if (orphan_dir) { 1649 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1650 ocfs2_inode_unlock(orphan_dir, 1); 1651 inode_unlock(orphan_dir); 1652 iput(orphan_dir); 1653 } 1654 1655 if (new_child_locked) 1656 ocfs2_inode_unlock(new_inode, 1); 1657 1658 if (old_child_locked) 1659 ocfs2_inode_unlock(old_inode, 1); 1660 1661 if (parents_locked) 1662 ocfs2_double_unlock(old_dir, new_dir); 1663 1664 if (rename_lock) 1665 ocfs2_rename_unlock(osb); 1666 1667 if (new_inode) 1668 sync_mapping_buffers(old_inode->i_mapping); 1669 1670 iput(new_inode); 1671 1672 ocfs2_free_dir_lookup_result(&target_lookup_res); 1673 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1674 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1675 ocfs2_free_dir_lookup_result(&orphan_insert); 1676 ocfs2_free_dir_lookup_result(&target_insert); 1677 1678 brelse(newfe_bh); 1679 brelse(old_inode_bh); 1680 brelse(old_dir_bh); 1681 brelse(new_dir_bh); 1682 1683 if (status) 1684 mlog_errno(status); 1685 1686 return status; 1687 } 1688 1689 /* 1690 * we expect i_size = strlen(symname). Copy symname into the file 1691 * data, including the null terminator. 1692 */ 1693 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1694 handle_t *handle, 1695 struct inode *inode, 1696 const char *symname) 1697 { 1698 struct buffer_head **bhs = NULL; 1699 const char *c; 1700 struct super_block *sb = osb->sb; 1701 u64 p_blkno, p_blocks; 1702 int virtual, blocks, status, i, bytes_left; 1703 1704 bytes_left = i_size_read(inode) + 1; 1705 /* we can't trust i_blocks because we're actually going to 1706 * write i_size + 1 bytes. */ 1707 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1708 1709 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, 1710 i_size_read(inode), blocks); 1711 1712 /* Sanity check -- make sure we're going to fit. */ 1713 if (bytes_left > 1714 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1715 status = -EIO; 1716 mlog_errno(status); 1717 goto bail; 1718 } 1719 1720 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1721 if (!bhs) { 1722 status = -ENOMEM; 1723 mlog_errno(status); 1724 goto bail; 1725 } 1726 1727 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1728 NULL); 1729 if (status < 0) { 1730 mlog_errno(status); 1731 goto bail; 1732 } 1733 1734 /* links can never be larger than one cluster so we know this 1735 * is all going to be contiguous, but do a sanity check 1736 * anyway. */ 1737 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1738 status = -EIO; 1739 mlog_errno(status); 1740 goto bail; 1741 } 1742 1743 virtual = 0; 1744 while(bytes_left > 0) { 1745 c = &symname[virtual * sb->s_blocksize]; 1746 1747 bhs[virtual] = sb_getblk(sb, p_blkno); 1748 if (!bhs[virtual]) { 1749 status = -ENOMEM; 1750 mlog_errno(status); 1751 goto bail; 1752 } 1753 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1754 bhs[virtual]); 1755 1756 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1757 bhs[virtual], 1758 OCFS2_JOURNAL_ACCESS_CREATE); 1759 if (status < 0) { 1760 mlog_errno(status); 1761 goto bail; 1762 } 1763 1764 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1765 1766 memcpy(bhs[virtual]->b_data, c, 1767 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1768 bytes_left); 1769 1770 ocfs2_journal_dirty(handle, bhs[virtual]); 1771 1772 virtual++; 1773 p_blkno++; 1774 bytes_left -= sb->s_blocksize; 1775 } 1776 1777 status = 0; 1778 bail: 1779 1780 if (bhs) { 1781 for(i = 0; i < blocks; i++) 1782 brelse(bhs[i]); 1783 kfree(bhs); 1784 } 1785 1786 if (status) 1787 mlog_errno(status); 1788 return status; 1789 } 1790 1791 static int ocfs2_symlink(struct user_namespace *mnt_userns, 1792 struct inode *dir, 1793 struct dentry *dentry, 1794 const char *symname) 1795 { 1796 int status, l, credits; 1797 u64 newsize; 1798 struct ocfs2_super *osb = NULL; 1799 struct inode *inode = NULL; 1800 struct super_block *sb; 1801 struct buffer_head *new_fe_bh = NULL; 1802 struct buffer_head *parent_fe_bh = NULL; 1803 struct ocfs2_dinode *fe = NULL; 1804 struct ocfs2_dinode *dirfe; 1805 handle_t *handle = NULL; 1806 struct ocfs2_alloc_context *inode_ac = NULL; 1807 struct ocfs2_alloc_context *data_ac = NULL; 1808 struct ocfs2_alloc_context *xattr_ac = NULL; 1809 int want_clusters = 0; 1810 int xattr_credits = 0; 1811 struct ocfs2_security_xattr_info si = { 1812 .enable = 1, 1813 }; 1814 int did_quota = 0, did_quota_inode = 0; 1815 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1816 sigset_t oldset; 1817 int did_block_signals = 0; 1818 struct ocfs2_dentry_lock *dl = NULL; 1819 1820 trace_ocfs2_symlink_begin(dir, dentry, symname, 1821 dentry->d_name.len, dentry->d_name.name); 1822 1823 status = dquot_initialize(dir); 1824 if (status) { 1825 mlog_errno(status); 1826 goto bail; 1827 } 1828 1829 sb = dir->i_sb; 1830 osb = OCFS2_SB(sb); 1831 1832 l = strlen(symname) + 1; 1833 1834 credits = ocfs2_calc_symlink_credits(sb); 1835 1836 /* lock the parent directory */ 1837 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1838 if (status < 0) { 1839 if (status != -ENOENT) 1840 mlog_errno(status); 1841 return status; 1842 } 1843 1844 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1845 if (!ocfs2_read_links_count(dirfe)) { 1846 /* can't make a file in a deleted directory. */ 1847 status = -ENOENT; 1848 goto bail; 1849 } 1850 1851 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1852 dentry->d_name.len); 1853 if (status) 1854 goto bail; 1855 1856 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1857 dentry->d_name.name, 1858 dentry->d_name.len, &lookup); 1859 if (status < 0) { 1860 mlog_errno(status); 1861 goto bail; 1862 } 1863 1864 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1865 if (status < 0) { 1866 if (status != -ENOSPC) 1867 mlog_errno(status); 1868 goto bail; 1869 } 1870 1871 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1872 if (IS_ERR(inode)) { 1873 status = PTR_ERR(inode); 1874 inode = NULL; 1875 mlog_errno(status); 1876 goto bail; 1877 } 1878 1879 /* get security xattr */ 1880 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1881 if (status) { 1882 if (status == -EOPNOTSUPP) 1883 si.enable = 0; 1884 else { 1885 mlog_errno(status); 1886 goto bail; 1887 } 1888 } 1889 1890 /* calculate meta data/clusters for setting security xattr */ 1891 if (si.enable) { 1892 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1893 &xattr_credits, &xattr_ac); 1894 if (status < 0) { 1895 mlog_errno(status); 1896 goto bail; 1897 } 1898 } 1899 1900 /* don't reserve bitmap space for fast symlinks. */ 1901 if (l > ocfs2_fast_symlink_chars(sb)) 1902 want_clusters += 1; 1903 1904 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1905 if (status < 0) { 1906 if (status != -ENOSPC) 1907 mlog_errno(status); 1908 goto bail; 1909 } 1910 1911 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1912 if (IS_ERR(handle)) { 1913 status = PTR_ERR(handle); 1914 handle = NULL; 1915 mlog_errno(status); 1916 goto bail; 1917 } 1918 1919 /* Starting to change things, restart is no longer possible. */ 1920 ocfs2_block_signals(&oldset); 1921 did_block_signals = 1; 1922 1923 status = dquot_alloc_inode(inode); 1924 if (status) 1925 goto bail; 1926 did_quota_inode = 1; 1927 1928 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1929 dentry->d_name.name, 1930 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1931 inode->i_mode); 1932 1933 status = ocfs2_mknod_locked(osb, dir, inode, 1934 0, &new_fe_bh, parent_fe_bh, handle, 1935 inode_ac); 1936 if (status < 0) { 1937 mlog_errno(status); 1938 goto bail; 1939 } 1940 1941 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1942 inode->i_rdev = 0; 1943 newsize = l - 1; 1944 inode->i_op = &ocfs2_symlink_inode_operations; 1945 inode_nohighmem(inode); 1946 if (l > ocfs2_fast_symlink_chars(sb)) { 1947 u32 offset = 0; 1948 1949 status = dquot_alloc_space_nodirty(inode, 1950 ocfs2_clusters_to_bytes(osb->sb, 1)); 1951 if (status) 1952 goto bail; 1953 did_quota = 1; 1954 inode->i_mapping->a_ops = &ocfs2_aops; 1955 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1956 new_fe_bh, 1957 handle, data_ac, NULL, 1958 NULL); 1959 if (status < 0) { 1960 if (status != -ENOSPC && status != -EINTR) { 1961 mlog(ML_ERROR, 1962 "Failed to extend file to %llu\n", 1963 (unsigned long long)newsize); 1964 mlog_errno(status); 1965 status = -ENOSPC; 1966 } 1967 goto bail; 1968 } 1969 i_size_write(inode, newsize); 1970 inode->i_blocks = ocfs2_inode_sector_count(inode); 1971 } else { 1972 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1973 memcpy((char *) fe->id2.i_symlink, symname, l); 1974 i_size_write(inode, newsize); 1975 inode->i_blocks = 0; 1976 } 1977 1978 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1979 if (status < 0) { 1980 mlog_errno(status); 1981 goto bail; 1982 } 1983 1984 if (!ocfs2_inode_is_fast_symlink(inode)) { 1985 status = ocfs2_create_symlink_data(osb, handle, inode, 1986 symname); 1987 if (status < 0) { 1988 mlog_errno(status); 1989 goto bail; 1990 } 1991 } 1992 1993 if (si.enable) { 1994 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 1995 xattr_ac, data_ac); 1996 if (status < 0) { 1997 mlog_errno(status); 1998 goto bail; 1999 } 2000 } 2001 2002 /* 2003 * Do this before adding the entry to the directory. We add 2004 * also set d_op after success so that ->d_iput() will cleanup 2005 * the dentry lock even if ocfs2_add_entry() fails below. 2006 */ 2007 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 2008 if (status) { 2009 mlog_errno(status); 2010 goto bail; 2011 } 2012 2013 dl = dentry->d_fsdata; 2014 2015 status = ocfs2_add_entry(handle, dentry, inode, 2016 le64_to_cpu(fe->i_blkno), parent_fe_bh, 2017 &lookup); 2018 if (status < 0) { 2019 mlog_errno(status); 2020 goto bail; 2021 } 2022 2023 insert_inode_hash(inode); 2024 d_instantiate(dentry, inode); 2025 bail: 2026 if (status < 0 && did_quota) 2027 dquot_free_space_nodirty(inode, 2028 ocfs2_clusters_to_bytes(osb->sb, 1)); 2029 if (status < 0 && did_quota_inode) 2030 dquot_free_inode(inode); 2031 if (handle) 2032 ocfs2_commit_trans(osb, handle); 2033 2034 ocfs2_inode_unlock(dir, 1); 2035 if (did_block_signals) 2036 ocfs2_unblock_signals(&oldset); 2037 2038 brelse(new_fe_bh); 2039 brelse(parent_fe_bh); 2040 kfree(si.value); 2041 ocfs2_free_dir_lookup_result(&lookup); 2042 if (inode_ac) 2043 ocfs2_free_alloc_context(inode_ac); 2044 if (data_ac) 2045 ocfs2_free_alloc_context(data_ac); 2046 if (xattr_ac) 2047 ocfs2_free_alloc_context(xattr_ac); 2048 if ((status < 0) && inode) { 2049 if (dl) 2050 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 2051 2052 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 2053 clear_nlink(inode); 2054 iput(inode); 2055 } 2056 2057 if (status) 2058 mlog_errno(status); 2059 2060 return status; 2061 } 2062 2063 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2064 { 2065 int status, namelen; 2066 2067 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2068 (long long)blkno); 2069 if (namelen <= 0) { 2070 if (namelen) 2071 status = namelen; 2072 else 2073 status = -EINVAL; 2074 mlog_errno(status); 2075 goto bail; 2076 } 2077 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2078 status = -EINVAL; 2079 mlog_errno(status); 2080 goto bail; 2081 } 2082 2083 trace_ocfs2_blkno_stringify(blkno, name, namelen); 2084 2085 status = 0; 2086 bail: 2087 if (status < 0) 2088 mlog_errno(status); 2089 return status; 2090 } 2091 2092 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, 2093 struct inode **ret_orphan_dir, 2094 struct buffer_head **ret_orphan_dir_bh) 2095 { 2096 struct inode *orphan_dir_inode; 2097 struct buffer_head *orphan_dir_bh = NULL; 2098 int ret = 0; 2099 2100 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2101 ORPHAN_DIR_SYSTEM_INODE, 2102 osb->slot_num); 2103 if (!orphan_dir_inode) { 2104 ret = -ENOENT; 2105 mlog_errno(ret); 2106 return ret; 2107 } 2108 2109 inode_lock(orphan_dir_inode); 2110 2111 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2112 if (ret < 0) { 2113 inode_unlock(orphan_dir_inode); 2114 iput(orphan_dir_inode); 2115 2116 mlog_errno(ret); 2117 return ret; 2118 } 2119 2120 *ret_orphan_dir = orphan_dir_inode; 2121 *ret_orphan_dir_bh = orphan_dir_bh; 2122 2123 return 0; 2124 } 2125 2126 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, 2127 struct buffer_head *orphan_dir_bh, 2128 u64 blkno, 2129 char *name, 2130 struct ocfs2_dir_lookup_result *lookup, 2131 bool dio) 2132 { 2133 int ret; 2134 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); 2135 int namelen = dio ? 2136 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2137 OCFS2_ORPHAN_NAMELEN; 2138 2139 if (dio) { 2140 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2141 OCFS2_DIO_ORPHAN_PREFIX); 2142 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2143 ret = -EINVAL; 2144 mlog_errno(ret); 2145 return ret; 2146 } 2147 2148 ret = ocfs2_blkno_stringify(blkno, 2149 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2150 } else 2151 ret = ocfs2_blkno_stringify(blkno, name); 2152 if (ret < 0) { 2153 mlog_errno(ret); 2154 return ret; 2155 } 2156 2157 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2158 orphan_dir_bh, name, 2159 namelen, lookup); 2160 if (ret < 0) { 2161 mlog_errno(ret); 2162 return ret; 2163 } 2164 2165 return 0; 2166 } 2167 2168 /** 2169 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for 2170 * insertion of an orphan. 2171 * @osb: ocfs2 file system 2172 * @ret_orphan_dir: Orphan dir inode - returned locked! 2173 * @blkno: Actual block number of the inode to be inserted into orphan dir. 2174 * @lookup: dir lookup result, to be passed back into functions like 2175 * ocfs2_orphan_add 2176 * 2177 * Returns zero on success and the ret_orphan_dir, name and lookup 2178 * fields will be populated. 2179 * 2180 * Returns non-zero on failure. 2181 */ 2182 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2183 struct inode **ret_orphan_dir, 2184 u64 blkno, 2185 char *name, 2186 struct ocfs2_dir_lookup_result *lookup, 2187 bool dio) 2188 { 2189 struct inode *orphan_dir_inode = NULL; 2190 struct buffer_head *orphan_dir_bh = NULL; 2191 int ret = 0; 2192 2193 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, 2194 &orphan_dir_bh); 2195 if (ret < 0) { 2196 mlog_errno(ret); 2197 return ret; 2198 } 2199 2200 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, 2201 blkno, name, lookup, dio); 2202 if (ret < 0) { 2203 mlog_errno(ret); 2204 goto out; 2205 } 2206 2207 *ret_orphan_dir = orphan_dir_inode; 2208 2209 out: 2210 brelse(orphan_dir_bh); 2211 2212 if (ret) { 2213 ocfs2_inode_unlock(orphan_dir_inode, 1); 2214 inode_unlock(orphan_dir_inode); 2215 iput(orphan_dir_inode); 2216 } 2217 2218 if (ret) 2219 mlog_errno(ret); 2220 return ret; 2221 } 2222 2223 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2224 handle_t *handle, 2225 struct inode *inode, 2226 struct buffer_head *fe_bh, 2227 char *name, 2228 struct ocfs2_dir_lookup_result *lookup, 2229 struct inode *orphan_dir_inode, 2230 bool dio) 2231 { 2232 struct buffer_head *orphan_dir_bh = NULL; 2233 int status = 0; 2234 struct ocfs2_dinode *orphan_fe; 2235 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 2236 int namelen = dio ? 2237 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2238 OCFS2_ORPHAN_NAMELEN; 2239 2240 trace_ocfs2_orphan_add_begin( 2241 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2242 2243 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 2244 if (status < 0) { 2245 mlog_errno(status); 2246 goto leave; 2247 } 2248 2249 status = ocfs2_journal_access_di(handle, 2250 INODE_CACHE(orphan_dir_inode), 2251 orphan_dir_bh, 2252 OCFS2_JOURNAL_ACCESS_WRITE); 2253 if (status < 0) { 2254 mlog_errno(status); 2255 goto leave; 2256 } 2257 2258 /* 2259 * We're going to journal the change of i_flags and i_orphaned_slot. 2260 * It's safe anyway, though some callers may duplicate the journaling. 2261 * Journaling within the func just make the logic look more 2262 * straightforward. 2263 */ 2264 status = ocfs2_journal_access_di(handle, 2265 INODE_CACHE(inode), 2266 fe_bh, 2267 OCFS2_JOURNAL_ACCESS_WRITE); 2268 if (status < 0) { 2269 mlog_errno(status); 2270 goto leave; 2271 } 2272 2273 /* we're a cluster, and nlink can change on disk from 2274 * underneath us... */ 2275 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2276 if (S_ISDIR(inode->i_mode)) 2277 ocfs2_add_links_count(orphan_fe, 1); 2278 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2279 ocfs2_journal_dirty(handle, orphan_dir_bh); 2280 2281 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2282 namelen, inode, 2283 OCFS2_I(inode)->ip_blkno, 2284 orphan_dir_bh, lookup); 2285 if (status < 0) { 2286 mlog_errno(status); 2287 goto rollback; 2288 } 2289 2290 if (dio) { 2291 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan 2292 * slot. 2293 */ 2294 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2295 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); 2296 } else { 2297 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL); 2298 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; 2299 2300 /* Record which orphan dir our inode now resides 2301 * in. delete_inode will use this to determine which orphan 2302 * dir to lock. */ 2303 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2304 } 2305 2306 ocfs2_journal_dirty(handle, fe_bh); 2307 2308 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, 2309 osb->slot_num); 2310 2311 rollback: 2312 if (status < 0) { 2313 if (S_ISDIR(inode->i_mode)) 2314 ocfs2_add_links_count(orphan_fe, -1); 2315 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2316 } 2317 2318 leave: 2319 brelse(orphan_dir_bh); 2320 2321 return status; 2322 } 2323 2324 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2325 int ocfs2_orphan_del(struct ocfs2_super *osb, 2326 handle_t *handle, 2327 struct inode *orphan_dir_inode, 2328 struct inode *inode, 2329 struct buffer_head *orphan_dir_bh, 2330 bool dio) 2331 { 2332 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2333 struct ocfs2_dinode *orphan_fe; 2334 int status = 0; 2335 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2336 2337 if (dio) { 2338 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2339 OCFS2_DIO_ORPHAN_PREFIX); 2340 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2341 status = -EINVAL; 2342 mlog_errno(status); 2343 return status; 2344 } 2345 2346 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, 2347 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2348 } else 2349 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2350 if (status < 0) { 2351 mlog_errno(status); 2352 goto leave; 2353 } 2354 2355 trace_ocfs2_orphan_del( 2356 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2357 name, strlen(name)); 2358 2359 status = ocfs2_journal_access_di(handle, 2360 INODE_CACHE(orphan_dir_inode), 2361 orphan_dir_bh, 2362 OCFS2_JOURNAL_ACCESS_WRITE); 2363 if (status < 0) { 2364 mlog_errno(status); 2365 goto leave; 2366 } 2367 2368 /* find it's spot in the orphan directory */ 2369 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode, 2370 &lookup); 2371 if (status) { 2372 mlog_errno(status); 2373 goto leave; 2374 } 2375 2376 /* remove it from the orphan directory */ 2377 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); 2378 if (status < 0) { 2379 mlog_errno(status); 2380 goto leave; 2381 } 2382 2383 /* do the i_nlink dance! :) */ 2384 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2385 if (S_ISDIR(inode->i_mode)) 2386 ocfs2_add_links_count(orphan_fe, -1); 2387 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2388 ocfs2_journal_dirty(handle, orphan_dir_bh); 2389 2390 leave: 2391 ocfs2_free_dir_lookup_result(&lookup); 2392 2393 if (status) 2394 mlog_errno(status); 2395 return status; 2396 } 2397 2398 /** 2399 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly 2400 * allocated file. This is different from the typical 'add to orphan dir' 2401 * operation in that the inode does not yet exist. This is a problem because 2402 * the orphan dir stringifies the inode block number to come up with it's 2403 * dirent. Obviously if the inode does not yet exist we have a chicken and egg 2404 * problem. This function works around it by calling deeper into the orphan 2405 * and suballoc code than other callers. Use this only by necessity. 2406 * @dir: The directory which this inode will ultimately wind up under - not the 2407 * orphan dir! 2408 * @dir_bh: buffer_head the @dir inode block 2409 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled 2410 * with the string to be used for orphan dirent. Pass back to the orphan dir 2411 * code. 2412 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan 2413 * dir code. 2414 * @ret_di_blkno: block number where the new inode will be allocated. 2415 * @orphan_insert: Dir insert context to be passed back into orphan dir code. 2416 * @ret_inode_ac: Inode alloc context to be passed back to the allocator. 2417 * 2418 * Returns zero on success and the ret_orphan_dir, name and lookup 2419 * fields will be populated. 2420 * 2421 * Returns non-zero on failure. 2422 */ 2423 static int ocfs2_prep_new_orphaned_file(struct inode *dir, 2424 struct buffer_head *dir_bh, 2425 char *orphan_name, 2426 struct inode **ret_orphan_dir, 2427 u64 *ret_di_blkno, 2428 struct ocfs2_dir_lookup_result *orphan_insert, 2429 struct ocfs2_alloc_context **ret_inode_ac) 2430 { 2431 int ret; 2432 u64 di_blkno; 2433 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2434 struct inode *orphan_dir = NULL; 2435 struct buffer_head *orphan_dir_bh = NULL; 2436 struct ocfs2_alloc_context *inode_ac = NULL; 2437 2438 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); 2439 if (ret < 0) { 2440 mlog_errno(ret); 2441 return ret; 2442 } 2443 2444 /* reserve an inode spot */ 2445 ret = ocfs2_reserve_new_inode(osb, &inode_ac); 2446 if (ret < 0) { 2447 if (ret != -ENOSPC) 2448 mlog_errno(ret); 2449 goto out; 2450 } 2451 2452 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, 2453 &di_blkno); 2454 if (ret) { 2455 mlog_errno(ret); 2456 goto out; 2457 } 2458 2459 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, 2460 di_blkno, orphan_name, orphan_insert, 2461 false); 2462 if (ret < 0) { 2463 mlog_errno(ret); 2464 goto out; 2465 } 2466 2467 out: 2468 if (ret == 0) { 2469 *ret_orphan_dir = orphan_dir; 2470 *ret_di_blkno = di_blkno; 2471 *ret_inode_ac = inode_ac; 2472 /* 2473 * orphan_name and orphan_insert are already up to 2474 * date via prepare_orphan_dir 2475 */ 2476 } else { 2477 /* Unroll reserve_new_inode* */ 2478 if (inode_ac) 2479 ocfs2_free_alloc_context(inode_ac); 2480 2481 /* Unroll orphan dir locking */ 2482 inode_unlock(orphan_dir); 2483 ocfs2_inode_unlock(orphan_dir, 1); 2484 iput(orphan_dir); 2485 } 2486 2487 brelse(orphan_dir_bh); 2488 2489 return ret; 2490 } 2491 2492 int ocfs2_create_inode_in_orphan(struct inode *dir, 2493 int mode, 2494 struct inode **new_inode) 2495 { 2496 int status, did_quota_inode = 0; 2497 struct inode *inode = NULL; 2498 struct inode *orphan_dir = NULL; 2499 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2500 handle_t *handle = NULL; 2501 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2502 struct buffer_head *parent_di_bh = NULL; 2503 struct buffer_head *new_di_bh = NULL; 2504 struct ocfs2_alloc_context *inode_ac = NULL; 2505 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2506 u64 di_blkno, suballoc_loc; 2507 u16 suballoc_bit; 2508 2509 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2510 if (status < 0) { 2511 if (status != -ENOENT) 2512 mlog_errno(status); 2513 return status; 2514 } 2515 2516 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, 2517 orphan_name, &orphan_dir, 2518 &di_blkno, &orphan_insert, &inode_ac); 2519 if (status < 0) { 2520 if (status != -ENOSPC) 2521 mlog_errno(status); 2522 goto leave; 2523 } 2524 2525 inode = ocfs2_get_init_inode(dir, mode); 2526 if (IS_ERR(inode)) { 2527 status = PTR_ERR(inode); 2528 inode = NULL; 2529 mlog_errno(status); 2530 goto leave; 2531 } 2532 2533 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2534 if (IS_ERR(handle)) { 2535 status = PTR_ERR(handle); 2536 handle = NULL; 2537 mlog_errno(status); 2538 goto leave; 2539 } 2540 2541 status = dquot_alloc_inode(inode); 2542 if (status) 2543 goto leave; 2544 did_quota_inode = 1; 2545 2546 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, 2547 &suballoc_loc, 2548 &suballoc_bit, di_blkno); 2549 if (status < 0) { 2550 mlog_errno(status); 2551 goto leave; 2552 } 2553 2554 clear_nlink(inode); 2555 /* do the real work now. */ 2556 status = __ocfs2_mknod_locked(dir, inode, 2557 0, &new_di_bh, parent_di_bh, handle, 2558 inode_ac, di_blkno, suballoc_loc, 2559 suballoc_bit); 2560 if (status < 0) { 2561 mlog_errno(status); 2562 goto leave; 2563 } 2564 2565 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, 2566 &orphan_insert, orphan_dir, false); 2567 if (status < 0) { 2568 mlog_errno(status); 2569 goto leave; 2570 } 2571 2572 /* get open lock so that only nodes can't remove it from orphan dir. */ 2573 status = ocfs2_open_lock(inode); 2574 if (status < 0) 2575 mlog_errno(status); 2576 2577 insert_inode_hash(inode); 2578 leave: 2579 if (status < 0 && did_quota_inode) 2580 dquot_free_inode(inode); 2581 if (handle) 2582 ocfs2_commit_trans(osb, handle); 2583 2584 if (orphan_dir) { 2585 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2586 ocfs2_inode_unlock(orphan_dir, 1); 2587 inode_unlock(orphan_dir); 2588 iput(orphan_dir); 2589 } 2590 2591 if ((status < 0) && inode) { 2592 clear_nlink(inode); 2593 iput(inode); 2594 } 2595 2596 if (inode_ac) 2597 ocfs2_free_alloc_context(inode_ac); 2598 2599 brelse(new_di_bh); 2600 2601 if (!status) 2602 *new_inode = inode; 2603 2604 ocfs2_free_dir_lookup_result(&orphan_insert); 2605 2606 ocfs2_inode_unlock(dir, 1); 2607 brelse(parent_di_bh); 2608 return status; 2609 } 2610 2611 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, 2612 struct inode *inode) 2613 { 2614 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2615 struct inode *orphan_dir_inode = NULL; 2616 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2617 struct buffer_head *di_bh = NULL; 2618 int status = 0; 2619 handle_t *handle = NULL; 2620 struct ocfs2_dinode *di = NULL; 2621 2622 status = ocfs2_inode_lock(inode, &di_bh, 1); 2623 if (status < 0) { 2624 mlog_errno(status); 2625 goto bail; 2626 } 2627 2628 di = (struct ocfs2_dinode *) di_bh->b_data; 2629 /* 2630 * Another append dio crashed? 2631 * If so, manually recover it first. 2632 */ 2633 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 2634 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode)); 2635 if (status < 0) { 2636 if (status != -ENOSPC) 2637 mlog_errno(status); 2638 goto bail_unlock_inode; 2639 } 2640 2641 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0); 2642 if (status < 0) { 2643 mlog_errno(status); 2644 goto bail_unlock_inode; 2645 } 2646 } 2647 2648 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, 2649 OCFS2_I(inode)->ip_blkno, 2650 orphan_name, 2651 &orphan_insert, 2652 true); 2653 if (status < 0) { 2654 mlog_errno(status); 2655 goto bail_unlock_inode; 2656 } 2657 2658 handle = ocfs2_start_trans(osb, 2659 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); 2660 if (IS_ERR(handle)) { 2661 status = PTR_ERR(handle); 2662 goto bail_unlock_orphan; 2663 } 2664 2665 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, 2666 &orphan_insert, orphan_dir_inode, true); 2667 if (status) 2668 mlog_errno(status); 2669 2670 ocfs2_commit_trans(osb, handle); 2671 2672 bail_unlock_orphan: 2673 ocfs2_inode_unlock(orphan_dir_inode, 1); 2674 inode_unlock(orphan_dir_inode); 2675 iput(orphan_dir_inode); 2676 2677 ocfs2_free_dir_lookup_result(&orphan_insert); 2678 2679 bail_unlock_inode: 2680 ocfs2_inode_unlock(inode, 1); 2681 brelse(di_bh); 2682 2683 bail: 2684 return status; 2685 } 2686 2687 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, 2688 struct inode *inode, struct buffer_head *di_bh, 2689 int update_isize, loff_t end) 2690 { 2691 struct inode *orphan_dir_inode = NULL; 2692 struct buffer_head *orphan_dir_bh = NULL; 2693 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2694 handle_t *handle = NULL; 2695 int status = 0; 2696 2697 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2698 ORPHAN_DIR_SYSTEM_INODE, 2699 le16_to_cpu(di->i_dio_orphaned_slot)); 2700 if (!orphan_dir_inode) { 2701 status = -ENOENT; 2702 mlog_errno(status); 2703 goto bail; 2704 } 2705 2706 inode_lock(orphan_dir_inode); 2707 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2708 if (status < 0) { 2709 inode_unlock(orphan_dir_inode); 2710 iput(orphan_dir_inode); 2711 mlog_errno(status); 2712 goto bail; 2713 } 2714 2715 handle = ocfs2_start_trans(osb, 2716 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); 2717 if (IS_ERR(handle)) { 2718 status = PTR_ERR(handle); 2719 goto bail_unlock_orphan; 2720 } 2721 2722 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); 2723 2724 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, 2725 inode, orphan_dir_bh, true); 2726 if (status < 0) { 2727 mlog_errno(status); 2728 goto bail_commit; 2729 } 2730 2731 status = ocfs2_journal_access_di(handle, 2732 INODE_CACHE(inode), 2733 di_bh, 2734 OCFS2_JOURNAL_ACCESS_WRITE); 2735 if (status < 0) { 2736 mlog_errno(status); 2737 goto bail_commit; 2738 } 2739 2740 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2741 di->i_dio_orphaned_slot = 0; 2742 2743 if (update_isize) { 2744 status = ocfs2_set_inode_size(handle, inode, di_bh, end); 2745 if (status) 2746 mlog_errno(status); 2747 } else 2748 ocfs2_journal_dirty(handle, di_bh); 2749 2750 bail_commit: 2751 ocfs2_commit_trans(osb, handle); 2752 2753 bail_unlock_orphan: 2754 ocfs2_inode_unlock(orphan_dir_inode, 1); 2755 inode_unlock(orphan_dir_inode); 2756 brelse(orphan_dir_bh); 2757 iput(orphan_dir_inode); 2758 2759 bail: 2760 return status; 2761 } 2762 2763 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2764 struct inode *inode, 2765 struct dentry *dentry) 2766 { 2767 int status = 0; 2768 struct buffer_head *parent_di_bh = NULL; 2769 handle_t *handle = NULL; 2770 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2771 struct ocfs2_dinode *dir_di, *di; 2772 struct inode *orphan_dir_inode = NULL; 2773 struct buffer_head *orphan_dir_bh = NULL; 2774 struct buffer_head *di_bh = NULL; 2775 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2776 2777 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, 2778 dentry->d_name.len, dentry->d_name.name, 2779 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2780 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2781 2782 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2783 if (status < 0) { 2784 if (status != -ENOENT) 2785 mlog_errno(status); 2786 return status; 2787 } 2788 2789 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2790 if (!dir_di->i_links_count) { 2791 /* can't make a file in a deleted directory. */ 2792 status = -ENOENT; 2793 goto leave; 2794 } 2795 2796 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2797 dentry->d_name.len); 2798 if (status) 2799 goto leave; 2800 2801 /* get a spot inside the dir. */ 2802 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2803 dentry->d_name.name, 2804 dentry->d_name.len, &lookup); 2805 if (status < 0) { 2806 mlog_errno(status); 2807 goto leave; 2808 } 2809 2810 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2811 ORPHAN_DIR_SYSTEM_INODE, 2812 osb->slot_num); 2813 if (!orphan_dir_inode) { 2814 status = -ENOENT; 2815 mlog_errno(status); 2816 goto leave; 2817 } 2818 2819 inode_lock(orphan_dir_inode); 2820 2821 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2822 if (status < 0) { 2823 mlog_errno(status); 2824 inode_unlock(orphan_dir_inode); 2825 iput(orphan_dir_inode); 2826 goto leave; 2827 } 2828 2829 status = ocfs2_read_inode_block(inode, &di_bh); 2830 if (status < 0) { 2831 mlog_errno(status); 2832 goto orphan_unlock; 2833 } 2834 2835 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2836 if (IS_ERR(handle)) { 2837 status = PTR_ERR(handle); 2838 handle = NULL; 2839 mlog_errno(status); 2840 goto orphan_unlock; 2841 } 2842 2843 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2844 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2845 if (status < 0) { 2846 mlog_errno(status); 2847 goto out_commit; 2848 } 2849 2850 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2851 orphan_dir_bh, false); 2852 if (status < 0) { 2853 mlog_errno(status); 2854 goto out_commit; 2855 } 2856 2857 di = (struct ocfs2_dinode *)di_bh->b_data; 2858 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); 2859 di->i_orphaned_slot = 0; 2860 set_nlink(inode, 1); 2861 ocfs2_set_links_count(di, inode->i_nlink); 2862 ocfs2_update_inode_fsync_trans(handle, inode, 1); 2863 ocfs2_journal_dirty(handle, di_bh); 2864 2865 status = ocfs2_add_entry(handle, dentry, inode, 2866 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2867 &lookup); 2868 if (status < 0) { 2869 mlog_errno(status); 2870 goto out_commit; 2871 } 2872 2873 status = ocfs2_dentry_attach_lock(dentry, inode, 2874 OCFS2_I(dir)->ip_blkno); 2875 if (status) { 2876 mlog_errno(status); 2877 goto out_commit; 2878 } 2879 2880 d_instantiate(dentry, inode); 2881 status = 0; 2882 out_commit: 2883 ocfs2_commit_trans(osb, handle); 2884 orphan_unlock: 2885 ocfs2_inode_unlock(orphan_dir_inode, 1); 2886 inode_unlock(orphan_dir_inode); 2887 iput(orphan_dir_inode); 2888 leave: 2889 2890 ocfs2_inode_unlock(dir, 1); 2891 2892 brelse(di_bh); 2893 brelse(parent_di_bh); 2894 brelse(orphan_dir_bh); 2895 2896 ocfs2_free_dir_lookup_result(&lookup); 2897 2898 if (status) 2899 mlog_errno(status); 2900 2901 return status; 2902 } 2903 2904 const struct inode_operations ocfs2_dir_iops = { 2905 .create = ocfs2_create, 2906 .lookup = ocfs2_lookup, 2907 .link = ocfs2_link, 2908 .unlink = ocfs2_unlink, 2909 .rmdir = ocfs2_unlink, 2910 .symlink = ocfs2_symlink, 2911 .mkdir = ocfs2_mkdir, 2912 .mknod = ocfs2_mknod, 2913 .rename = ocfs2_rename, 2914 .setattr = ocfs2_setattr, 2915 .getattr = ocfs2_getattr, 2916 .permission = ocfs2_permission, 2917 .listxattr = ocfs2_listxattr, 2918 .fiemap = ocfs2_fiemap, 2919 .get_acl = ocfs2_iop_get_acl, 2920 .set_acl = ocfs2_iop_set_acl, 2921 }; 2922