1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * namei.c 5 * 6 * Create and rename file, directory, symlinks 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * Portions of this code from linux/fs/ext3/dir.c 11 * 12 * Copyright (C) 1992, 1993, 1994, 1995 13 * Remy Card (card@masi.ibp.fr) 14 * Laboratoire MASI - Institut Blaise pascal 15 * Universite Pierre et Marie Curie (Paris VI) 16 * 17 * from 18 * 19 * linux/fs/minix/dir.c 20 * 21 * Copyright (C) 1991, 1992 Linux Torvalds 22 * 23 * This program is free software; you can redistribute it and/or 24 * modify it under the terms of the GNU General Public 25 * License as published by the Free Software Foundation; either 26 * version 2 of the License, or (at your option) any later version. 27 * 28 * This program is distributed in the hope that it will be useful, 29 * but WITHOUT ANY WARRANTY; without even the implied warranty of 30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 31 * General Public License for more details. 32 * 33 * You should have received a copy of the GNU General Public 34 * License along with this program; if not, write to the 35 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 36 * Boston, MA 021110-1307, USA. 37 */ 38 39 #include <linux/fs.h> 40 #include <linux/types.h> 41 #include <linux/slab.h> 42 #include <linux/highmem.h> 43 #include <linux/quotaops.h> 44 45 #include <cluster/masklog.h> 46 47 #include "ocfs2.h" 48 49 #include "alloc.h" 50 #include "dcache.h" 51 #include "dir.h" 52 #include "dlmglue.h" 53 #include "extent_map.h" 54 #include "file.h" 55 #include "inode.h" 56 #include "journal.h" 57 #include "namei.h" 58 #include "suballoc.h" 59 #include "super.h" 60 #include "symlink.h" 61 #include "sysfile.h" 62 #include "uptodate.h" 63 #include "xattr.h" 64 #include "acl.h" 65 #include "ocfs2_trace.h" 66 67 #include "buffer_head_io.h" 68 69 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 70 struct inode *dir, 71 struct inode *inode, 72 dev_t dev, 73 struct buffer_head **new_fe_bh, 74 struct buffer_head *parent_fe_bh, 75 handle_t *handle, 76 struct ocfs2_alloc_context *inode_ac); 77 78 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 79 struct inode **ret_orphan_dir, 80 u64 blkno, 81 char *name, 82 struct ocfs2_dir_lookup_result *lookup, 83 bool dio); 84 85 static int ocfs2_orphan_add(struct ocfs2_super *osb, 86 handle_t *handle, 87 struct inode *inode, 88 struct buffer_head *fe_bh, 89 char *name, 90 struct ocfs2_dir_lookup_result *lookup, 91 struct inode *orphan_dir_inode, 92 bool dio); 93 94 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 95 handle_t *handle, 96 struct inode *inode, 97 const char *symname); 98 99 static int ocfs2_double_lock(struct ocfs2_super *osb, 100 struct buffer_head **bh1, 101 struct inode *inode1, 102 struct buffer_head **bh2, 103 struct inode *inode2, 104 int rename); 105 106 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2); 107 /* An orphan dir name is an 8 byte value, printed as a hex string */ 108 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64))) 109 110 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, 111 unsigned int flags) 112 { 113 int status; 114 u64 blkno; 115 struct inode *inode = NULL; 116 struct dentry *ret; 117 struct ocfs2_inode_info *oi; 118 119 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len, 120 dentry->d_name.name, 121 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0); 122 123 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { 124 ret = ERR_PTR(-ENAMETOOLONG); 125 goto bail; 126 } 127 128 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT); 129 if (status < 0) { 130 if (status != -ENOENT) 131 mlog_errno(status); 132 ret = ERR_PTR(status); 133 goto bail; 134 } 135 136 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name, 137 dentry->d_name.len, &blkno); 138 if (status < 0) 139 goto bail_add; 140 141 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0); 142 if (IS_ERR(inode)) { 143 ret = ERR_PTR(-EACCES); 144 goto bail_unlock; 145 } 146 147 oi = OCFS2_I(inode); 148 /* Clear any orphaned state... If we were able to look up the 149 * inode from a directory, it certainly can't be orphaned. We 150 * might have the bad state from a node which intended to 151 * orphan this inode but crashed before it could commit the 152 * unlink. */ 153 spin_lock(&oi->ip_lock); 154 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; 155 spin_unlock(&oi->ip_lock); 156 157 bail_add: 158 ret = d_splice_alias(inode, dentry); 159 160 if (inode) { 161 /* 162 * If d_splice_alias() finds a DCACHE_DISCONNECTED 163 * dentry, it will d_move() it on top of ourse. The 164 * return value will indicate this however, so in 165 * those cases, we switch them around for the locking 166 * code. 167 * 168 * NOTE: This dentry already has ->d_op set from 169 * ocfs2_get_parent() and ocfs2_get_dentry() 170 */ 171 if (!IS_ERR_OR_NULL(ret)) 172 dentry = ret; 173 174 status = ocfs2_dentry_attach_lock(dentry, inode, 175 OCFS2_I(dir)->ip_blkno); 176 if (status) { 177 mlog_errno(status); 178 ret = ERR_PTR(status); 179 goto bail_unlock; 180 } 181 } else 182 ocfs2_dentry_attach_gen(dentry); 183 184 bail_unlock: 185 /* Don't drop the cluster lock until *after* the d_add -- 186 * unlink on another node will message us to remove that 187 * dentry under this lock so otherwise we can race this with 188 * the downconvert thread and have a stale dentry. */ 189 ocfs2_inode_unlock(dir, 0); 190 191 bail: 192 193 trace_ocfs2_lookup_ret(ret); 194 195 return ret; 196 } 197 198 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode) 199 { 200 struct inode *inode; 201 int status; 202 203 inode = new_inode(dir->i_sb); 204 if (!inode) { 205 mlog(ML_ERROR, "new_inode failed!\n"); 206 return ERR_PTR(-ENOMEM); 207 } 208 209 /* populate as many fields early on as possible - many of 210 * these are used by the support functions here and in 211 * callers. */ 212 if (S_ISDIR(mode)) 213 set_nlink(inode, 2); 214 inode_init_owner(inode, dir, mode); 215 status = dquot_initialize(inode); 216 if (status) 217 return ERR_PTR(status); 218 219 return inode; 220 } 221 222 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb, 223 struct dentry *dentry, struct inode *inode) 224 { 225 struct ocfs2_dentry_lock *dl = dentry->d_fsdata; 226 227 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres); 228 ocfs2_lock_res_free(&dl->dl_lockres); 229 BUG_ON(dl->dl_count != 1); 230 spin_lock(&dentry_attach_lock); 231 dentry->d_fsdata = NULL; 232 spin_unlock(&dentry_attach_lock); 233 kfree(dl); 234 iput(inode); 235 } 236 237 static int ocfs2_mknod(struct inode *dir, 238 struct dentry *dentry, 239 umode_t mode, 240 dev_t dev) 241 { 242 int status = 0; 243 struct buffer_head *parent_fe_bh = NULL; 244 handle_t *handle = NULL; 245 struct ocfs2_super *osb; 246 struct ocfs2_dinode *dirfe; 247 struct buffer_head *new_fe_bh = NULL; 248 struct inode *inode = NULL; 249 struct ocfs2_alloc_context *inode_ac = NULL; 250 struct ocfs2_alloc_context *data_ac = NULL; 251 struct ocfs2_alloc_context *meta_ac = NULL; 252 int want_clusters = 0; 253 int want_meta = 0; 254 int xattr_credits = 0; 255 struct ocfs2_security_xattr_info si = { 256 .enable = 1, 257 }; 258 int did_quota_inode = 0; 259 struct ocfs2_dir_lookup_result lookup = { NULL, }; 260 sigset_t oldset; 261 int did_block_signals = 0; 262 struct ocfs2_dentry_lock *dl = NULL; 263 264 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name, 265 (unsigned long long)OCFS2_I(dir)->ip_blkno, 266 (unsigned long)dev, mode); 267 268 status = dquot_initialize(dir); 269 if (status) { 270 mlog_errno(status); 271 return status; 272 } 273 274 /* get our super block */ 275 osb = OCFS2_SB(dir->i_sb); 276 277 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 278 if (status < 0) { 279 if (status != -ENOENT) 280 mlog_errno(status); 281 return status; 282 } 283 284 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) { 285 status = -EMLINK; 286 goto leave; 287 } 288 289 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 290 if (!ocfs2_read_links_count(dirfe)) { 291 /* can't make a file in a deleted directory. */ 292 status = -ENOENT; 293 goto leave; 294 } 295 296 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 297 dentry->d_name.len); 298 if (status) 299 goto leave; 300 301 /* get a spot inside the dir. */ 302 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 303 dentry->d_name.name, 304 dentry->d_name.len, &lookup); 305 if (status < 0) { 306 mlog_errno(status); 307 goto leave; 308 } 309 310 /* reserve an inode spot */ 311 status = ocfs2_reserve_new_inode(osb, &inode_ac); 312 if (status < 0) { 313 if (status != -ENOSPC) 314 mlog_errno(status); 315 goto leave; 316 } 317 318 inode = ocfs2_get_init_inode(dir, mode); 319 if (IS_ERR(inode)) { 320 status = PTR_ERR(inode); 321 inode = NULL; 322 mlog_errno(status); 323 goto leave; 324 } 325 326 /* get security xattr */ 327 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 328 if (status) { 329 if (status == -EOPNOTSUPP) 330 si.enable = 0; 331 else { 332 mlog_errno(status); 333 goto leave; 334 } 335 } 336 337 /* calculate meta data/clusters for setting security and acl xattr */ 338 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode, 339 &si, &want_clusters, 340 &xattr_credits, &want_meta); 341 if (status < 0) { 342 mlog_errno(status); 343 goto leave; 344 } 345 346 /* Reserve a cluster if creating an extent based directory. */ 347 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { 348 want_clusters += 1; 349 350 /* Dir indexing requires extra space as well */ 351 if (ocfs2_supports_indexed_dirs(osb)) 352 want_meta++; 353 } 354 355 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac); 356 if (status < 0) { 357 if (status != -ENOSPC) 358 mlog_errno(status); 359 goto leave; 360 } 361 362 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 363 if (status < 0) { 364 if (status != -ENOSPC) 365 mlog_errno(status); 366 goto leave; 367 } 368 369 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 370 S_ISDIR(mode), 371 xattr_credits)); 372 if (IS_ERR(handle)) { 373 status = PTR_ERR(handle); 374 handle = NULL; 375 mlog_errno(status); 376 goto leave; 377 } 378 379 /* Starting to change things, restart is no longer possible. */ 380 ocfs2_block_signals(&oldset); 381 did_block_signals = 1; 382 383 status = dquot_alloc_inode(inode); 384 if (status) 385 goto leave; 386 did_quota_inode = 1; 387 388 /* do the real work now. */ 389 status = ocfs2_mknod_locked(osb, dir, inode, dev, 390 &new_fe_bh, parent_fe_bh, handle, 391 inode_ac); 392 if (status < 0) { 393 mlog_errno(status); 394 goto leave; 395 } 396 397 if (S_ISDIR(mode)) { 398 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 399 new_fe_bh, data_ac, meta_ac); 400 if (status < 0) { 401 mlog_errno(status); 402 goto leave; 403 } 404 405 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir), 406 parent_fe_bh, 407 OCFS2_JOURNAL_ACCESS_WRITE); 408 if (status < 0) { 409 mlog_errno(status); 410 goto leave; 411 } 412 ocfs2_add_links_count(dirfe, 1); 413 ocfs2_journal_dirty(handle, parent_fe_bh); 414 inc_nlink(dir); 415 } 416 417 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh, 418 meta_ac, data_ac); 419 420 if (status < 0) { 421 mlog_errno(status); 422 goto leave; 423 } 424 425 if (si.enable) { 426 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 427 meta_ac, data_ac); 428 if (status < 0) { 429 mlog_errno(status); 430 goto leave; 431 } 432 } 433 434 /* 435 * Do this before adding the entry to the directory. We add 436 * also set d_op after success so that ->d_iput() will cleanup 437 * the dentry lock even if ocfs2_add_entry() fails below. 438 */ 439 status = ocfs2_dentry_attach_lock(dentry, inode, 440 OCFS2_I(dir)->ip_blkno); 441 if (status) { 442 mlog_errno(status); 443 goto leave; 444 } 445 446 dl = dentry->d_fsdata; 447 448 status = ocfs2_add_entry(handle, dentry, inode, 449 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 450 &lookup); 451 if (status < 0) { 452 mlog_errno(status); 453 goto leave; 454 } 455 456 insert_inode_hash(inode); 457 d_instantiate(dentry, inode); 458 status = 0; 459 leave: 460 if (status < 0 && did_quota_inode) 461 dquot_free_inode(inode); 462 if (handle) 463 ocfs2_commit_trans(osb, handle); 464 465 ocfs2_inode_unlock(dir, 1); 466 if (did_block_signals) 467 ocfs2_unblock_signals(&oldset); 468 469 brelse(new_fe_bh); 470 brelse(parent_fe_bh); 471 kfree(si.value); 472 473 ocfs2_free_dir_lookup_result(&lookup); 474 475 if (inode_ac) 476 ocfs2_free_alloc_context(inode_ac); 477 478 if (data_ac) 479 ocfs2_free_alloc_context(data_ac); 480 481 if (meta_ac) 482 ocfs2_free_alloc_context(meta_ac); 483 484 /* 485 * We should call iput after the i_mutex of the bitmap been 486 * unlocked in ocfs2_free_alloc_context, or the 487 * ocfs2_delete_inode will mutex_lock again. 488 */ 489 if ((status < 0) && inode) { 490 if (dl) 491 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 492 493 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 494 clear_nlink(inode); 495 iput(inode); 496 } 497 498 if (status) 499 mlog_errno(status); 500 501 return status; 502 } 503 504 static int __ocfs2_mknod_locked(struct inode *dir, 505 struct inode *inode, 506 dev_t dev, 507 struct buffer_head **new_fe_bh, 508 struct buffer_head *parent_fe_bh, 509 handle_t *handle, 510 struct ocfs2_alloc_context *inode_ac, 511 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit) 512 { 513 int status = 0; 514 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 515 struct ocfs2_dinode *fe = NULL; 516 struct ocfs2_extent_list *fel; 517 u16 feat; 518 struct ocfs2_inode_info *oi = OCFS2_I(inode); 519 struct timespec64 ts; 520 521 *new_fe_bh = NULL; 522 523 /* populate as many fields early on as possible - many of 524 * these are used by the support functions here and in 525 * callers. */ 526 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 527 OCFS2_I(inode)->ip_blkno = fe_blkno; 528 spin_lock(&osb->osb_lock); 529 inode->i_generation = osb->s_next_generation++; 530 spin_unlock(&osb->osb_lock); 531 532 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 533 if (!*new_fe_bh) { 534 status = -ENOMEM; 535 mlog_errno(status); 536 goto leave; 537 } 538 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh); 539 540 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 541 *new_fe_bh, 542 OCFS2_JOURNAL_ACCESS_CREATE); 543 if (status < 0) { 544 mlog_errno(status); 545 goto leave; 546 } 547 548 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 549 memset(fe, 0, osb->sb->s_blocksize); 550 551 fe->i_generation = cpu_to_le32(inode->i_generation); 552 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 553 fe->i_blkno = cpu_to_le64(fe_blkno); 554 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc); 555 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 556 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); 557 fe->i_uid = cpu_to_le32(i_uid_read(inode)); 558 fe->i_gid = cpu_to_le32(i_gid_read(inode)); 559 fe->i_mode = cpu_to_le16(inode->i_mode); 560 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 561 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 562 563 ocfs2_set_links_count(fe, inode->i_nlink); 564 565 fe->i_last_eb_blk = 0; 566 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 567 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL); 568 ktime_get_real_ts64(&ts); 569 fe->i_atime = fe->i_ctime = fe->i_mtime = 570 cpu_to_le64(ts.tv_sec); 571 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 572 cpu_to_le32(ts.tv_nsec); 573 fe->i_dtime = 0; 574 575 /* 576 * If supported, directories start with inline data. If inline 577 * isn't supported, but indexing is, we start them as indexed. 578 */ 579 feat = le16_to_cpu(fe->i_dyn_features); 580 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) { 581 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); 582 583 fe->id2.i_data.id_count = cpu_to_le16( 584 ocfs2_max_inline_data_with_xattr(osb->sb, fe)); 585 } else { 586 fel = &fe->id2.i_list; 587 fel->l_tree_depth = 0; 588 fel->l_next_free_rec = 0; 589 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 590 } 591 592 ocfs2_journal_dirty(handle, *new_fe_bh); 593 594 ocfs2_populate_inode(inode, fe, 1); 595 ocfs2_ci_set_new(osb, INODE_CACHE(inode)); 596 if (!ocfs2_mount_local(osb)) { 597 status = ocfs2_create_new_inode_locks(inode); 598 if (status < 0) 599 mlog_errno(status); 600 } 601 602 oi->i_sync_tid = handle->h_transaction->t_tid; 603 oi->i_datasync_tid = handle->h_transaction->t_tid; 604 605 leave: 606 if (status < 0) { 607 if (*new_fe_bh) { 608 brelse(*new_fe_bh); 609 *new_fe_bh = NULL; 610 } 611 } 612 613 if (status) 614 mlog_errno(status); 615 return status; 616 } 617 618 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 619 struct inode *dir, 620 struct inode *inode, 621 dev_t dev, 622 struct buffer_head **new_fe_bh, 623 struct buffer_head *parent_fe_bh, 624 handle_t *handle, 625 struct ocfs2_alloc_context *inode_ac) 626 { 627 int status = 0; 628 u64 suballoc_loc, fe_blkno = 0; 629 u16 suballoc_bit; 630 631 *new_fe_bh = NULL; 632 633 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh, 634 inode_ac, &suballoc_loc, 635 &suballoc_bit, &fe_blkno); 636 if (status < 0) { 637 mlog_errno(status); 638 return status; 639 } 640 641 status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, 642 parent_fe_bh, handle, inode_ac, 643 fe_blkno, suballoc_loc, suballoc_bit); 644 if (status < 0) { 645 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit); 646 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode, 647 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1); 648 if (tmp) 649 mlog_errno(tmp); 650 } 651 652 return status; 653 } 654 655 static int ocfs2_mkdir(struct inode *dir, 656 struct dentry *dentry, 657 umode_t mode) 658 { 659 int ret; 660 661 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, 662 OCFS2_I(dir)->ip_blkno, mode); 663 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); 664 if (ret) 665 mlog_errno(ret); 666 667 return ret; 668 } 669 670 static int ocfs2_create(struct inode *dir, 671 struct dentry *dentry, 672 umode_t mode, 673 bool excl) 674 { 675 int ret; 676 677 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name, 678 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode); 679 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); 680 if (ret) 681 mlog_errno(ret); 682 683 return ret; 684 } 685 686 static int ocfs2_link(struct dentry *old_dentry, 687 struct inode *dir, 688 struct dentry *dentry) 689 { 690 handle_t *handle; 691 struct inode *inode = d_inode(old_dentry); 692 struct inode *old_dir = d_inode(old_dentry->d_parent); 693 int err; 694 struct buffer_head *fe_bh = NULL; 695 struct buffer_head *old_dir_bh = NULL; 696 struct buffer_head *parent_fe_bh = NULL; 697 struct ocfs2_dinode *fe = NULL; 698 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 699 struct ocfs2_dir_lookup_result lookup = { NULL, }; 700 sigset_t oldset; 701 u64 old_de_ino; 702 703 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno, 704 old_dentry->d_name.len, old_dentry->d_name.name, 705 dentry->d_name.len, dentry->d_name.name); 706 707 if (S_ISDIR(inode->i_mode)) 708 return -EPERM; 709 710 err = dquot_initialize(dir); 711 if (err) { 712 mlog_errno(err); 713 return err; 714 } 715 716 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 717 &parent_fe_bh, dir, 0); 718 if (err < 0) { 719 if (err != -ENOENT) 720 mlog_errno(err); 721 return err; 722 } 723 724 /* make sure both dirs have bhs 725 * get an extra ref on old_dir_bh if old==new */ 726 if (!parent_fe_bh) { 727 if (old_dir_bh) { 728 parent_fe_bh = old_dir_bh; 729 get_bh(parent_fe_bh); 730 } else { 731 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str); 732 err = -EIO; 733 goto out; 734 } 735 } 736 737 if (!dir->i_nlink) { 738 err = -ENOENT; 739 goto out; 740 } 741 742 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 743 old_dentry->d_name.len, &old_de_ino); 744 if (err) { 745 err = -ENOENT; 746 goto out; 747 } 748 749 /* 750 * Check whether another node removed the source inode while we 751 * were in the vfs. 752 */ 753 if (old_de_ino != OCFS2_I(inode)->ip_blkno) { 754 err = -ENOENT; 755 goto out; 756 } 757 758 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 759 dentry->d_name.len); 760 if (err) 761 goto out; 762 763 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 764 dentry->d_name.name, 765 dentry->d_name.len, &lookup); 766 if (err < 0) { 767 mlog_errno(err); 768 goto out; 769 } 770 771 err = ocfs2_inode_lock(inode, &fe_bh, 1); 772 if (err < 0) { 773 if (err != -ENOENT) 774 mlog_errno(err); 775 goto out; 776 } 777 778 fe = (struct ocfs2_dinode *) fe_bh->b_data; 779 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { 780 err = -EMLINK; 781 goto out_unlock_inode; 782 } 783 784 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); 785 if (IS_ERR(handle)) { 786 err = PTR_ERR(handle); 787 handle = NULL; 788 mlog_errno(err); 789 goto out_unlock_inode; 790 } 791 792 /* Starting to change things, restart is no longer possible. */ 793 ocfs2_block_signals(&oldset); 794 795 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 796 OCFS2_JOURNAL_ACCESS_WRITE); 797 if (err < 0) { 798 mlog_errno(err); 799 goto out_commit; 800 } 801 802 inc_nlink(inode); 803 inode->i_ctime = current_time(inode); 804 ocfs2_set_links_count(fe, inode->i_nlink); 805 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 806 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 807 ocfs2_journal_dirty(handle, fe_bh); 808 809 err = ocfs2_add_entry(handle, dentry, inode, 810 OCFS2_I(inode)->ip_blkno, 811 parent_fe_bh, &lookup); 812 if (err) { 813 ocfs2_add_links_count(fe, -1); 814 drop_nlink(inode); 815 mlog_errno(err); 816 goto out_commit; 817 } 818 819 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 820 if (err) { 821 mlog_errno(err); 822 goto out_commit; 823 } 824 825 ihold(inode); 826 d_instantiate(dentry, inode); 827 828 out_commit: 829 ocfs2_commit_trans(osb, handle); 830 ocfs2_unblock_signals(&oldset); 831 out_unlock_inode: 832 ocfs2_inode_unlock(inode, 1); 833 834 out: 835 ocfs2_double_unlock(old_dir, dir); 836 837 brelse(fe_bh); 838 brelse(parent_fe_bh); 839 brelse(old_dir_bh); 840 841 ocfs2_free_dir_lookup_result(&lookup); 842 843 if (err) 844 mlog_errno(err); 845 846 return err; 847 } 848 849 /* 850 * Takes and drops an exclusive lock on the given dentry. This will 851 * force other nodes to drop it. 852 */ 853 static int ocfs2_remote_dentry_delete(struct dentry *dentry) 854 { 855 int ret; 856 857 ret = ocfs2_dentry_lock(dentry, 1); 858 if (ret) 859 mlog_errno(ret); 860 else 861 ocfs2_dentry_unlock(dentry, 1); 862 863 return ret; 864 } 865 866 static inline int ocfs2_inode_is_unlinkable(struct inode *inode) 867 { 868 if (S_ISDIR(inode->i_mode)) { 869 if (inode->i_nlink == 2) 870 return 1; 871 return 0; 872 } 873 874 if (inode->i_nlink == 1) 875 return 1; 876 return 0; 877 } 878 879 static int ocfs2_unlink(struct inode *dir, 880 struct dentry *dentry) 881 { 882 int status; 883 int child_locked = 0; 884 bool is_unlinkable = false; 885 struct inode *inode = d_inode(dentry); 886 struct inode *orphan_dir = NULL; 887 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 888 u64 blkno; 889 struct ocfs2_dinode *fe = NULL; 890 struct buffer_head *fe_bh = NULL; 891 struct buffer_head *parent_node_bh = NULL; 892 handle_t *handle = NULL; 893 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 894 struct ocfs2_dir_lookup_result lookup = { NULL, }; 895 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 896 897 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, 898 dentry->d_name.name, 899 (unsigned long long)OCFS2_I(dir)->ip_blkno, 900 (unsigned long long)OCFS2_I(inode)->ip_blkno); 901 902 status = dquot_initialize(dir); 903 if (status) { 904 mlog_errno(status); 905 return status; 906 } 907 908 BUG_ON(d_inode(dentry->d_parent) != dir); 909 910 if (inode == osb->root_inode) 911 return -EPERM; 912 913 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 914 OI_LS_PARENT); 915 if (status < 0) { 916 if (status != -ENOENT) 917 mlog_errno(status); 918 return status; 919 } 920 921 status = ocfs2_find_files_on_disk(dentry->d_name.name, 922 dentry->d_name.len, &blkno, dir, 923 &lookup); 924 if (status < 0) { 925 if (status != -ENOENT) 926 mlog_errno(status); 927 goto leave; 928 } 929 930 if (OCFS2_I(inode)->ip_blkno != blkno) { 931 status = -ENOENT; 932 933 trace_ocfs2_unlink_noent( 934 (unsigned long long)OCFS2_I(inode)->ip_blkno, 935 (unsigned long long)blkno, 936 OCFS2_I(inode)->ip_flags); 937 goto leave; 938 } 939 940 status = ocfs2_inode_lock(inode, &fe_bh, 1); 941 if (status < 0) { 942 if (status != -ENOENT) 943 mlog_errno(status); 944 goto leave; 945 } 946 child_locked = 1; 947 948 if (S_ISDIR(inode->i_mode)) { 949 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 950 status = -ENOTEMPTY; 951 goto leave; 952 } 953 } 954 955 status = ocfs2_remote_dentry_delete(dentry); 956 if (status < 0) { 957 /* This remote delete should succeed under all normal 958 * circumstances. */ 959 mlog_errno(status); 960 goto leave; 961 } 962 963 if (ocfs2_inode_is_unlinkable(inode)) { 964 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 965 OCFS2_I(inode)->ip_blkno, 966 orphan_name, &orphan_insert, 967 false); 968 if (status < 0) { 969 mlog_errno(status); 970 goto leave; 971 } 972 is_unlinkable = true; 973 } 974 975 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 976 if (IS_ERR(handle)) { 977 status = PTR_ERR(handle); 978 handle = NULL; 979 mlog_errno(status); 980 goto leave; 981 } 982 983 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 984 OCFS2_JOURNAL_ACCESS_WRITE); 985 if (status < 0) { 986 mlog_errno(status); 987 goto leave; 988 } 989 990 fe = (struct ocfs2_dinode *) fe_bh->b_data; 991 992 /* delete the name from the parent dir */ 993 status = ocfs2_delete_entry(handle, dir, &lookup); 994 if (status < 0) { 995 mlog_errno(status); 996 goto leave; 997 } 998 999 if (S_ISDIR(inode->i_mode)) 1000 drop_nlink(inode); 1001 drop_nlink(inode); 1002 ocfs2_set_links_count(fe, inode->i_nlink); 1003 ocfs2_journal_dirty(handle, fe_bh); 1004 1005 dir->i_ctime = dir->i_mtime = current_time(dir); 1006 if (S_ISDIR(inode->i_mode)) 1007 drop_nlink(dir); 1008 1009 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 1010 if (status < 0) { 1011 mlog_errno(status); 1012 if (S_ISDIR(inode->i_mode)) 1013 inc_nlink(dir); 1014 goto leave; 1015 } 1016 1017 if (is_unlinkable) { 1018 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, 1019 orphan_name, &orphan_insert, orphan_dir, false); 1020 if (status < 0) 1021 mlog_errno(status); 1022 } 1023 1024 leave: 1025 if (handle) 1026 ocfs2_commit_trans(osb, handle); 1027 1028 if (orphan_dir) { 1029 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1030 ocfs2_inode_unlock(orphan_dir, 1); 1031 inode_unlock(orphan_dir); 1032 iput(orphan_dir); 1033 } 1034 1035 if (child_locked) 1036 ocfs2_inode_unlock(inode, 1); 1037 1038 ocfs2_inode_unlock(dir, 1); 1039 1040 brelse(fe_bh); 1041 brelse(parent_node_bh); 1042 1043 ocfs2_free_dir_lookup_result(&orphan_insert); 1044 ocfs2_free_dir_lookup_result(&lookup); 1045 1046 if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) 1047 mlog_errno(status); 1048 1049 return status; 1050 } 1051 1052 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, 1053 u64 src_inode_no, u64 dest_inode_no) 1054 { 1055 int ret = 0, i = 0; 1056 u64 parent_inode_no = 0; 1057 u64 child_inode_no = src_inode_no; 1058 struct inode *child_inode; 1059 1060 #define MAX_LOOKUP_TIMES 32 1061 while (1) { 1062 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); 1063 if (IS_ERR(child_inode)) { 1064 ret = PTR_ERR(child_inode); 1065 break; 1066 } 1067 1068 ret = ocfs2_inode_lock(child_inode, NULL, 0); 1069 if (ret < 0) { 1070 iput(child_inode); 1071 if (ret != -ENOENT) 1072 mlog_errno(ret); 1073 break; 1074 } 1075 1076 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, 1077 &parent_inode_no); 1078 ocfs2_inode_unlock(child_inode, 0); 1079 iput(child_inode); 1080 if (ret < 0) { 1081 ret = -ENOENT; 1082 break; 1083 } 1084 1085 if (parent_inode_no == dest_inode_no) { 1086 ret = 1; 1087 break; 1088 } 1089 1090 if (parent_inode_no == osb->root_inode->i_ino) { 1091 ret = 0; 1092 break; 1093 } 1094 1095 child_inode_no = parent_inode_no; 1096 1097 if (++i >= MAX_LOOKUP_TIMES) { 1098 mlog(ML_NOTICE, "max lookup times reached, filesystem " 1099 "may have nested directories, " 1100 "src inode: %llu, dest inode: %llu.\n", 1101 (unsigned long long)src_inode_no, 1102 (unsigned long long)dest_inode_no); 1103 ret = 0; 1104 break; 1105 } 1106 } 1107 1108 return ret; 1109 } 1110 1111 /* 1112 * The only place this should be used is rename and link! 1113 * if they have the same id, then the 1st one is the only one locked. 1114 */ 1115 static int ocfs2_double_lock(struct ocfs2_super *osb, 1116 struct buffer_head **bh1, 1117 struct inode *inode1, 1118 struct buffer_head **bh2, 1119 struct inode *inode2, 1120 int rename) 1121 { 1122 int status; 1123 int inode1_is_ancestor, inode2_is_ancestor; 1124 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 1125 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 1126 1127 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 1128 (unsigned long long)oi2->ip_blkno); 1129 1130 if (*bh1) 1131 *bh1 = NULL; 1132 if (*bh2) 1133 *bh2 = NULL; 1134 1135 /* we always want to lock the one with the lower lockid first. 1136 * and if they are nested, we lock ancestor first */ 1137 if (oi1->ip_blkno != oi2->ip_blkno) { 1138 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, 1139 oi1->ip_blkno); 1140 if (inode1_is_ancestor < 0) { 1141 status = inode1_is_ancestor; 1142 goto bail; 1143 } 1144 1145 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, 1146 oi2->ip_blkno); 1147 if (inode2_is_ancestor < 0) { 1148 status = inode2_is_ancestor; 1149 goto bail; 1150 } 1151 1152 if ((inode1_is_ancestor == 1) || 1153 (oi1->ip_blkno < oi2->ip_blkno && 1154 inode2_is_ancestor == 0)) { 1155 /* switch id1 and id2 around */ 1156 swap(bh2, bh1); 1157 swap(inode2, inode1); 1158 } 1159 /* lock id2 */ 1160 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 1161 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); 1162 if (status < 0) { 1163 if (status != -ENOENT) 1164 mlog_errno(status); 1165 goto bail; 1166 } 1167 } 1168 1169 /* lock id1 */ 1170 status = ocfs2_inode_lock_nested(inode1, bh1, 1, 1171 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 1172 if (status < 0) { 1173 /* 1174 * An error return must mean that no cluster locks 1175 * were held on function exit. 1176 */ 1177 if (oi1->ip_blkno != oi2->ip_blkno) { 1178 ocfs2_inode_unlock(inode2, 1); 1179 brelse(*bh2); 1180 *bh2 = NULL; 1181 } 1182 1183 if (status != -ENOENT) 1184 mlog_errno(status); 1185 } 1186 1187 trace_ocfs2_double_lock_end( 1188 (unsigned long long)OCFS2_I(inode1)->ip_blkno, 1189 (unsigned long long)OCFS2_I(inode2)->ip_blkno); 1190 1191 bail: 1192 if (status) 1193 mlog_errno(status); 1194 return status; 1195 } 1196 1197 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1198 { 1199 ocfs2_inode_unlock(inode1, 1); 1200 1201 if (inode1 != inode2) 1202 ocfs2_inode_unlock(inode2, 1); 1203 } 1204 1205 static int ocfs2_rename(struct inode *old_dir, 1206 struct dentry *old_dentry, 1207 struct inode *new_dir, 1208 struct dentry *new_dentry, 1209 unsigned int flags) 1210 { 1211 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1212 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1213 struct inode *old_inode = d_inode(old_dentry); 1214 struct inode *new_inode = d_inode(new_dentry); 1215 struct inode *orphan_dir = NULL; 1216 struct ocfs2_dinode *newfe = NULL; 1217 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1218 struct buffer_head *newfe_bh = NULL; 1219 struct buffer_head *old_inode_bh = NULL; 1220 struct ocfs2_super *osb = NULL; 1221 u64 newfe_blkno, old_de_ino; 1222 handle_t *handle = NULL; 1223 struct buffer_head *old_dir_bh = NULL; 1224 struct buffer_head *new_dir_bh = NULL; 1225 u32 old_dir_nlink = old_dir->i_nlink; 1226 struct ocfs2_dinode *old_di; 1227 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1228 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1229 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1230 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1231 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1232 bool should_add_orphan = false; 1233 1234 if (flags) 1235 return -EINVAL; 1236 1237 /* At some point it might be nice to break this function up a 1238 * bit. */ 1239 1240 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, 1241 old_dentry->d_name.len, old_dentry->d_name.name, 1242 new_dentry->d_name.len, new_dentry->d_name.name); 1243 1244 status = dquot_initialize(old_dir); 1245 if (status) { 1246 mlog_errno(status); 1247 goto bail; 1248 } 1249 status = dquot_initialize(new_dir); 1250 if (status) { 1251 mlog_errno(status); 1252 goto bail; 1253 } 1254 1255 osb = OCFS2_SB(old_dir->i_sb); 1256 1257 if (new_inode) { 1258 if (!igrab(new_inode)) 1259 BUG(); 1260 } 1261 1262 /* Assume a directory hierarchy thusly: 1263 * a/b/c 1264 * a/d 1265 * a,b,c, and d are all directories. 1266 * 1267 * from cwd of 'a' on both nodes: 1268 * node1: mv b/c d 1269 * node2: mv d b/c 1270 * 1271 * And that's why, just like the VFS, we need a file system 1272 * rename lock. */ 1273 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1274 status = ocfs2_rename_lock(osb); 1275 if (status < 0) { 1276 mlog_errno(status); 1277 goto bail; 1278 } 1279 rename_lock = 1; 1280 1281 /* here we cannot guarantee the inodes haven't just been 1282 * changed, so check if they are nested again */ 1283 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, 1284 old_inode->i_ino); 1285 if (status < 0) { 1286 mlog_errno(status); 1287 goto bail; 1288 } else if (status == 1) { 1289 status = -EPERM; 1290 trace_ocfs2_rename_not_permitted( 1291 (unsigned long long)old_inode->i_ino, 1292 (unsigned long long)new_dir->i_ino); 1293 goto bail; 1294 } 1295 } 1296 1297 /* if old and new are the same, this'll just do one lock. */ 1298 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1299 &new_dir_bh, new_dir, 1); 1300 if (status < 0) { 1301 mlog_errno(status); 1302 goto bail; 1303 } 1304 parents_locked = 1; 1305 1306 if (!new_dir->i_nlink) { 1307 status = -EACCES; 1308 goto bail; 1309 } 1310 1311 /* make sure both dirs have bhs 1312 * get an extra ref on old_dir_bh if old==new */ 1313 if (!new_dir_bh) { 1314 if (old_dir_bh) { 1315 new_dir_bh = old_dir_bh; 1316 get_bh(new_dir_bh); 1317 } else { 1318 mlog(ML_ERROR, "no old_dir_bh!\n"); 1319 status = -EIO; 1320 goto bail; 1321 } 1322 } 1323 1324 /* 1325 * Aside from allowing a meta data update, the locking here 1326 * also ensures that the downconvert thread on other nodes 1327 * won't have to concurrently downconvert the inode and the 1328 * dentry locks. 1329 */ 1330 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1331 OI_LS_PARENT); 1332 if (status < 0) { 1333 if (status != -ENOENT) 1334 mlog_errno(status); 1335 goto bail; 1336 } 1337 old_child_locked = 1; 1338 1339 status = ocfs2_remote_dentry_delete(old_dentry); 1340 if (status < 0) { 1341 mlog_errno(status); 1342 goto bail; 1343 } 1344 1345 if (S_ISDIR(old_inode->i_mode)) { 1346 u64 old_inode_parent; 1347 1348 update_dot_dot = 1; 1349 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1350 old_inode, 1351 &old_inode_dot_dot_res); 1352 if (status) { 1353 status = -EIO; 1354 goto bail; 1355 } 1356 1357 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1358 status = -EIO; 1359 goto bail; 1360 } 1361 1362 if (!new_inode && new_dir != old_dir && 1363 new_dir->i_nlink >= ocfs2_link_max(osb)) { 1364 status = -EMLINK; 1365 goto bail; 1366 } 1367 } 1368 1369 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1370 old_dentry->d_name.len, 1371 &old_de_ino); 1372 if (status) { 1373 status = -ENOENT; 1374 goto bail; 1375 } 1376 1377 /* 1378 * Check for inode number is _not_ due to possible IO errors. 1379 * We might rmdir the source, keep it as pwd of some process 1380 * and merrily kill the link to whatever was created under the 1381 * same name. Goodbye sticky bit ;-< 1382 */ 1383 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1384 status = -ENOENT; 1385 goto bail; 1386 } 1387 1388 /* check if the target already exists (in which case we need 1389 * to delete it */ 1390 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1391 new_dentry->d_name.len, 1392 &newfe_blkno, new_dir, 1393 &target_lookup_res); 1394 /* The only error we allow here is -ENOENT because the new 1395 * file not existing is perfectly valid. */ 1396 if ((status < 0) && (status != -ENOENT)) { 1397 /* If we cannot find the file specified we should just */ 1398 /* return the error... */ 1399 mlog_errno(status); 1400 goto bail; 1401 } 1402 if (status == 0) 1403 target_exists = 1; 1404 1405 if (!target_exists && new_inode) { 1406 /* 1407 * Target was unlinked by another node while we were 1408 * waiting to get to ocfs2_rename(). There isn't 1409 * anything we can do here to help the situation, so 1410 * bubble up the appropriate error. 1411 */ 1412 status = -ENOENT; 1413 goto bail; 1414 } 1415 1416 /* In case we need to overwrite an existing file, we blow it 1417 * away first */ 1418 if (target_exists) { 1419 /* VFS didn't think there existed an inode here, but 1420 * someone else in the cluster must have raced our 1421 * rename to create one. Today we error cleanly, in 1422 * the future we should consider calling iget to build 1423 * a new struct inode for this entry. */ 1424 if (!new_inode) { 1425 status = -EACCES; 1426 1427 trace_ocfs2_rename_target_exists(new_dentry->d_name.len, 1428 new_dentry->d_name.name); 1429 goto bail; 1430 } 1431 1432 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1433 status = -EACCES; 1434 1435 trace_ocfs2_rename_disagree( 1436 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1437 (unsigned long long)newfe_blkno, 1438 OCFS2_I(new_inode)->ip_flags); 1439 goto bail; 1440 } 1441 1442 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1443 if (status < 0) { 1444 if (status != -ENOENT) 1445 mlog_errno(status); 1446 goto bail; 1447 } 1448 new_child_locked = 1; 1449 1450 status = ocfs2_remote_dentry_delete(new_dentry); 1451 if (status < 0) { 1452 mlog_errno(status); 1453 goto bail; 1454 } 1455 1456 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1457 1458 trace_ocfs2_rename_over_existing( 1459 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1460 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1461 1462 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1463 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1464 OCFS2_I(new_inode)->ip_blkno, 1465 orphan_name, &orphan_insert, 1466 false); 1467 if (status < 0) { 1468 mlog_errno(status); 1469 goto bail; 1470 } 1471 should_add_orphan = true; 1472 } 1473 } else { 1474 BUG_ON(d_inode(new_dentry->d_parent) != new_dir); 1475 1476 status = ocfs2_check_dir_for_entry(new_dir, 1477 new_dentry->d_name.name, 1478 new_dentry->d_name.len); 1479 if (status) 1480 goto bail; 1481 1482 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1483 new_dentry->d_name.name, 1484 new_dentry->d_name.len, 1485 &target_insert); 1486 if (status < 0) { 1487 mlog_errno(status); 1488 goto bail; 1489 } 1490 } 1491 1492 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1493 if (IS_ERR(handle)) { 1494 status = PTR_ERR(handle); 1495 handle = NULL; 1496 mlog_errno(status); 1497 goto bail; 1498 } 1499 1500 if (target_exists) { 1501 if (S_ISDIR(new_inode->i_mode)) { 1502 if (new_inode->i_nlink != 2 || 1503 !ocfs2_empty_dir(new_inode)) { 1504 status = -ENOTEMPTY; 1505 goto bail; 1506 } 1507 } 1508 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1509 newfe_bh, 1510 OCFS2_JOURNAL_ACCESS_WRITE); 1511 if (status < 0) { 1512 mlog_errno(status); 1513 goto bail; 1514 } 1515 1516 /* change the dirent to point to the correct inode */ 1517 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1518 old_inode); 1519 if (status < 0) { 1520 mlog_errno(status); 1521 goto bail; 1522 } 1523 new_dir->i_version++; 1524 1525 if (S_ISDIR(new_inode->i_mode)) 1526 ocfs2_set_links_count(newfe, 0); 1527 else 1528 ocfs2_add_links_count(newfe, -1); 1529 ocfs2_journal_dirty(handle, newfe_bh); 1530 if (should_add_orphan) { 1531 status = ocfs2_orphan_add(osb, handle, new_inode, 1532 newfe_bh, orphan_name, 1533 &orphan_insert, orphan_dir, false); 1534 if (status < 0) { 1535 mlog_errno(status); 1536 goto bail; 1537 } 1538 } 1539 } else { 1540 /* if the name was not found in new_dir, add it now */ 1541 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1542 OCFS2_I(old_inode)->ip_blkno, 1543 new_dir_bh, &target_insert); 1544 } 1545 1546 old_inode->i_ctime = current_time(old_inode); 1547 mark_inode_dirty(old_inode); 1548 1549 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1550 old_inode_bh, 1551 OCFS2_JOURNAL_ACCESS_WRITE); 1552 if (status >= 0) { 1553 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1554 1555 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); 1556 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); 1557 ocfs2_journal_dirty(handle, old_inode_bh); 1558 } else 1559 mlog_errno(status); 1560 1561 /* 1562 * Now that the name has been added to new_dir, remove the old name. 1563 * 1564 * We don't keep any directory entry context around until now 1565 * because the insert might have changed the type of directory 1566 * we're dealing with. 1567 */ 1568 status = ocfs2_find_entry(old_dentry->d_name.name, 1569 old_dentry->d_name.len, old_dir, 1570 &old_entry_lookup); 1571 if (status) { 1572 if (!is_journal_aborted(osb->journal->j_journal)) { 1573 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1574 "is not deleted.", 1575 new_dentry->d_name.len, new_dentry->d_name.name, 1576 old_dentry->d_name.len, old_dentry->d_name.name); 1577 } 1578 goto bail; 1579 } 1580 1581 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1582 if (status < 0) { 1583 mlog_errno(status); 1584 if (!is_journal_aborted(osb->journal->j_journal)) { 1585 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1586 "is not deleted.", 1587 new_dentry->d_name.len, new_dentry->d_name.name, 1588 old_dentry->d_name.len, old_dentry->d_name.name); 1589 } 1590 goto bail; 1591 } 1592 1593 if (new_inode) { 1594 drop_nlink(new_inode); 1595 new_inode->i_ctime = current_time(new_inode); 1596 } 1597 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir); 1598 1599 if (update_dot_dot) { 1600 status = ocfs2_update_entry(old_inode, handle, 1601 &old_inode_dot_dot_res, new_dir); 1602 drop_nlink(old_dir); 1603 if (new_inode) { 1604 drop_nlink(new_inode); 1605 } else { 1606 inc_nlink(new_dir); 1607 mark_inode_dirty(new_dir); 1608 } 1609 } 1610 mark_inode_dirty(old_dir); 1611 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1612 if (new_inode) { 1613 mark_inode_dirty(new_inode); 1614 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1615 } 1616 1617 if (old_dir != new_dir) { 1618 /* Keep the same times on both directories.*/ 1619 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; 1620 1621 /* 1622 * This will also pick up the i_nlink change from the 1623 * block above. 1624 */ 1625 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1626 } 1627 1628 if (old_dir_nlink != old_dir->i_nlink) { 1629 if (!old_dir_bh) { 1630 mlog(ML_ERROR, "need to change nlink for old dir " 1631 "%llu from %d to %d but bh is NULL!\n", 1632 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1633 (int)old_dir_nlink, old_dir->i_nlink); 1634 } else { 1635 struct ocfs2_dinode *fe; 1636 status = ocfs2_journal_access_di(handle, 1637 INODE_CACHE(old_dir), 1638 old_dir_bh, 1639 OCFS2_JOURNAL_ACCESS_WRITE); 1640 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1641 ocfs2_set_links_count(fe, old_dir->i_nlink); 1642 ocfs2_journal_dirty(handle, old_dir_bh); 1643 } 1644 } 1645 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1646 status = 0; 1647 bail: 1648 if (handle) 1649 ocfs2_commit_trans(osb, handle); 1650 1651 if (orphan_dir) { 1652 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1653 ocfs2_inode_unlock(orphan_dir, 1); 1654 inode_unlock(orphan_dir); 1655 iput(orphan_dir); 1656 } 1657 1658 if (new_child_locked) 1659 ocfs2_inode_unlock(new_inode, 1); 1660 1661 if (old_child_locked) 1662 ocfs2_inode_unlock(old_inode, 1); 1663 1664 if (parents_locked) 1665 ocfs2_double_unlock(old_dir, new_dir); 1666 1667 if (rename_lock) 1668 ocfs2_rename_unlock(osb); 1669 1670 if (new_inode) 1671 sync_mapping_buffers(old_inode->i_mapping); 1672 1673 iput(new_inode); 1674 1675 ocfs2_free_dir_lookup_result(&target_lookup_res); 1676 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1677 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1678 ocfs2_free_dir_lookup_result(&orphan_insert); 1679 ocfs2_free_dir_lookup_result(&target_insert); 1680 1681 brelse(newfe_bh); 1682 brelse(old_inode_bh); 1683 brelse(old_dir_bh); 1684 brelse(new_dir_bh); 1685 1686 if (status) 1687 mlog_errno(status); 1688 1689 return status; 1690 } 1691 1692 /* 1693 * we expect i_size = strlen(symname). Copy symname into the file 1694 * data, including the null terminator. 1695 */ 1696 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1697 handle_t *handle, 1698 struct inode *inode, 1699 const char *symname) 1700 { 1701 struct buffer_head **bhs = NULL; 1702 const char *c; 1703 struct super_block *sb = osb->sb; 1704 u64 p_blkno, p_blocks; 1705 int virtual, blocks, status, i, bytes_left; 1706 1707 bytes_left = i_size_read(inode) + 1; 1708 /* we can't trust i_blocks because we're actually going to 1709 * write i_size + 1 bytes. */ 1710 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1711 1712 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, 1713 i_size_read(inode), blocks); 1714 1715 /* Sanity check -- make sure we're going to fit. */ 1716 if (bytes_left > 1717 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1718 status = -EIO; 1719 mlog_errno(status); 1720 goto bail; 1721 } 1722 1723 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1724 if (!bhs) { 1725 status = -ENOMEM; 1726 mlog_errno(status); 1727 goto bail; 1728 } 1729 1730 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1731 NULL); 1732 if (status < 0) { 1733 mlog_errno(status); 1734 goto bail; 1735 } 1736 1737 /* links can never be larger than one cluster so we know this 1738 * is all going to be contiguous, but do a sanity check 1739 * anyway. */ 1740 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1741 status = -EIO; 1742 mlog_errno(status); 1743 goto bail; 1744 } 1745 1746 virtual = 0; 1747 while(bytes_left > 0) { 1748 c = &symname[virtual * sb->s_blocksize]; 1749 1750 bhs[virtual] = sb_getblk(sb, p_blkno); 1751 if (!bhs[virtual]) { 1752 status = -ENOMEM; 1753 mlog_errno(status); 1754 goto bail; 1755 } 1756 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1757 bhs[virtual]); 1758 1759 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1760 bhs[virtual], 1761 OCFS2_JOURNAL_ACCESS_CREATE); 1762 if (status < 0) { 1763 mlog_errno(status); 1764 goto bail; 1765 } 1766 1767 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1768 1769 memcpy(bhs[virtual]->b_data, c, 1770 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1771 bytes_left); 1772 1773 ocfs2_journal_dirty(handle, bhs[virtual]); 1774 1775 virtual++; 1776 p_blkno++; 1777 bytes_left -= sb->s_blocksize; 1778 } 1779 1780 status = 0; 1781 bail: 1782 1783 if (bhs) { 1784 for(i = 0; i < blocks; i++) 1785 brelse(bhs[i]); 1786 kfree(bhs); 1787 } 1788 1789 if (status) 1790 mlog_errno(status); 1791 return status; 1792 } 1793 1794 static int ocfs2_symlink(struct inode *dir, 1795 struct dentry *dentry, 1796 const char *symname) 1797 { 1798 int status, l, credits; 1799 u64 newsize; 1800 struct ocfs2_super *osb = NULL; 1801 struct inode *inode = NULL; 1802 struct super_block *sb; 1803 struct buffer_head *new_fe_bh = NULL; 1804 struct buffer_head *parent_fe_bh = NULL; 1805 struct ocfs2_dinode *fe = NULL; 1806 struct ocfs2_dinode *dirfe; 1807 handle_t *handle = NULL; 1808 struct ocfs2_alloc_context *inode_ac = NULL; 1809 struct ocfs2_alloc_context *data_ac = NULL; 1810 struct ocfs2_alloc_context *xattr_ac = NULL; 1811 int want_clusters = 0; 1812 int xattr_credits = 0; 1813 struct ocfs2_security_xattr_info si = { 1814 .enable = 1, 1815 }; 1816 int did_quota = 0, did_quota_inode = 0; 1817 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1818 sigset_t oldset; 1819 int did_block_signals = 0; 1820 struct ocfs2_dentry_lock *dl = NULL; 1821 1822 trace_ocfs2_symlink_begin(dir, dentry, symname, 1823 dentry->d_name.len, dentry->d_name.name); 1824 1825 status = dquot_initialize(dir); 1826 if (status) { 1827 mlog_errno(status); 1828 goto bail; 1829 } 1830 1831 sb = dir->i_sb; 1832 osb = OCFS2_SB(sb); 1833 1834 l = strlen(symname) + 1; 1835 1836 credits = ocfs2_calc_symlink_credits(sb); 1837 1838 /* lock the parent directory */ 1839 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1840 if (status < 0) { 1841 if (status != -ENOENT) 1842 mlog_errno(status); 1843 return status; 1844 } 1845 1846 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1847 if (!ocfs2_read_links_count(dirfe)) { 1848 /* can't make a file in a deleted directory. */ 1849 status = -ENOENT; 1850 goto bail; 1851 } 1852 1853 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1854 dentry->d_name.len); 1855 if (status) 1856 goto bail; 1857 1858 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1859 dentry->d_name.name, 1860 dentry->d_name.len, &lookup); 1861 if (status < 0) { 1862 mlog_errno(status); 1863 goto bail; 1864 } 1865 1866 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1867 if (status < 0) { 1868 if (status != -ENOSPC) 1869 mlog_errno(status); 1870 goto bail; 1871 } 1872 1873 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1874 if (IS_ERR(inode)) { 1875 status = PTR_ERR(inode); 1876 inode = NULL; 1877 mlog_errno(status); 1878 goto bail; 1879 } 1880 1881 /* get security xattr */ 1882 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1883 if (status) { 1884 if (status == -EOPNOTSUPP) 1885 si.enable = 0; 1886 else { 1887 mlog_errno(status); 1888 goto bail; 1889 } 1890 } 1891 1892 /* calculate meta data/clusters for setting security xattr */ 1893 if (si.enable) { 1894 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1895 &xattr_credits, &xattr_ac); 1896 if (status < 0) { 1897 mlog_errno(status); 1898 goto bail; 1899 } 1900 } 1901 1902 /* don't reserve bitmap space for fast symlinks. */ 1903 if (l > ocfs2_fast_symlink_chars(sb)) 1904 want_clusters += 1; 1905 1906 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1907 if (status < 0) { 1908 if (status != -ENOSPC) 1909 mlog_errno(status); 1910 goto bail; 1911 } 1912 1913 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1914 if (IS_ERR(handle)) { 1915 status = PTR_ERR(handle); 1916 handle = NULL; 1917 mlog_errno(status); 1918 goto bail; 1919 } 1920 1921 /* Starting to change things, restart is no longer possible. */ 1922 ocfs2_block_signals(&oldset); 1923 did_block_signals = 1; 1924 1925 status = dquot_alloc_inode(inode); 1926 if (status) 1927 goto bail; 1928 did_quota_inode = 1; 1929 1930 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1931 dentry->d_name.name, 1932 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1933 inode->i_mode); 1934 1935 status = ocfs2_mknod_locked(osb, dir, inode, 1936 0, &new_fe_bh, parent_fe_bh, handle, 1937 inode_ac); 1938 if (status < 0) { 1939 mlog_errno(status); 1940 goto bail; 1941 } 1942 1943 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1944 inode->i_rdev = 0; 1945 newsize = l - 1; 1946 inode->i_op = &ocfs2_symlink_inode_operations; 1947 inode_nohighmem(inode); 1948 if (l > ocfs2_fast_symlink_chars(sb)) { 1949 u32 offset = 0; 1950 1951 status = dquot_alloc_space_nodirty(inode, 1952 ocfs2_clusters_to_bytes(osb->sb, 1)); 1953 if (status) 1954 goto bail; 1955 did_quota = 1; 1956 inode->i_mapping->a_ops = &ocfs2_aops; 1957 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1958 new_fe_bh, 1959 handle, data_ac, NULL, 1960 NULL); 1961 if (status < 0) { 1962 if (status != -ENOSPC && status != -EINTR) { 1963 mlog(ML_ERROR, 1964 "Failed to extend file to %llu\n", 1965 (unsigned long long)newsize); 1966 mlog_errno(status); 1967 status = -ENOSPC; 1968 } 1969 goto bail; 1970 } 1971 i_size_write(inode, newsize); 1972 inode->i_blocks = ocfs2_inode_sector_count(inode); 1973 } else { 1974 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1975 memcpy((char *) fe->id2.i_symlink, symname, l); 1976 i_size_write(inode, newsize); 1977 inode->i_blocks = 0; 1978 } 1979 1980 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1981 if (status < 0) { 1982 mlog_errno(status); 1983 goto bail; 1984 } 1985 1986 if (!ocfs2_inode_is_fast_symlink(inode)) { 1987 status = ocfs2_create_symlink_data(osb, handle, inode, 1988 symname); 1989 if (status < 0) { 1990 mlog_errno(status); 1991 goto bail; 1992 } 1993 } 1994 1995 if (si.enable) { 1996 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 1997 xattr_ac, data_ac); 1998 if (status < 0) { 1999 mlog_errno(status); 2000 goto bail; 2001 } 2002 } 2003 2004 /* 2005 * Do this before adding the entry to the directory. We add 2006 * also set d_op after success so that ->d_iput() will cleanup 2007 * the dentry lock even if ocfs2_add_entry() fails below. 2008 */ 2009 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 2010 if (status) { 2011 mlog_errno(status); 2012 goto bail; 2013 } 2014 2015 dl = dentry->d_fsdata; 2016 2017 status = ocfs2_add_entry(handle, dentry, inode, 2018 le64_to_cpu(fe->i_blkno), parent_fe_bh, 2019 &lookup); 2020 if (status < 0) { 2021 mlog_errno(status); 2022 goto bail; 2023 } 2024 2025 insert_inode_hash(inode); 2026 d_instantiate(dentry, inode); 2027 bail: 2028 if (status < 0 && did_quota) 2029 dquot_free_space_nodirty(inode, 2030 ocfs2_clusters_to_bytes(osb->sb, 1)); 2031 if (status < 0 && did_quota_inode) 2032 dquot_free_inode(inode); 2033 if (handle) 2034 ocfs2_commit_trans(osb, handle); 2035 2036 ocfs2_inode_unlock(dir, 1); 2037 if (did_block_signals) 2038 ocfs2_unblock_signals(&oldset); 2039 2040 brelse(new_fe_bh); 2041 brelse(parent_fe_bh); 2042 kfree(si.value); 2043 ocfs2_free_dir_lookup_result(&lookup); 2044 if (inode_ac) 2045 ocfs2_free_alloc_context(inode_ac); 2046 if (data_ac) 2047 ocfs2_free_alloc_context(data_ac); 2048 if (xattr_ac) 2049 ocfs2_free_alloc_context(xattr_ac); 2050 if ((status < 0) && inode) { 2051 if (dl) 2052 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 2053 2054 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 2055 clear_nlink(inode); 2056 iput(inode); 2057 } 2058 2059 if (status) 2060 mlog_errno(status); 2061 2062 return status; 2063 } 2064 2065 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2066 { 2067 int status, namelen; 2068 2069 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2070 (long long)blkno); 2071 if (namelen <= 0) { 2072 if (namelen) 2073 status = namelen; 2074 else 2075 status = -EINVAL; 2076 mlog_errno(status); 2077 goto bail; 2078 } 2079 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2080 status = -EINVAL; 2081 mlog_errno(status); 2082 goto bail; 2083 } 2084 2085 trace_ocfs2_blkno_stringify(blkno, name, namelen); 2086 2087 status = 0; 2088 bail: 2089 if (status < 0) 2090 mlog_errno(status); 2091 return status; 2092 } 2093 2094 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, 2095 struct inode **ret_orphan_dir, 2096 struct buffer_head **ret_orphan_dir_bh) 2097 { 2098 struct inode *orphan_dir_inode; 2099 struct buffer_head *orphan_dir_bh = NULL; 2100 int ret = 0; 2101 2102 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2103 ORPHAN_DIR_SYSTEM_INODE, 2104 osb->slot_num); 2105 if (!orphan_dir_inode) { 2106 ret = -ENOENT; 2107 mlog_errno(ret); 2108 return ret; 2109 } 2110 2111 inode_lock(orphan_dir_inode); 2112 2113 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2114 if (ret < 0) { 2115 inode_unlock(orphan_dir_inode); 2116 iput(orphan_dir_inode); 2117 2118 mlog_errno(ret); 2119 return ret; 2120 } 2121 2122 *ret_orphan_dir = orphan_dir_inode; 2123 *ret_orphan_dir_bh = orphan_dir_bh; 2124 2125 return 0; 2126 } 2127 2128 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, 2129 struct buffer_head *orphan_dir_bh, 2130 u64 blkno, 2131 char *name, 2132 struct ocfs2_dir_lookup_result *lookup, 2133 bool dio) 2134 { 2135 int ret; 2136 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); 2137 int namelen = dio ? 2138 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2139 OCFS2_ORPHAN_NAMELEN; 2140 2141 if (dio) { 2142 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2143 OCFS2_DIO_ORPHAN_PREFIX); 2144 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2145 ret = -EINVAL; 2146 mlog_errno(ret); 2147 return ret; 2148 } 2149 2150 ret = ocfs2_blkno_stringify(blkno, 2151 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2152 } else 2153 ret = ocfs2_blkno_stringify(blkno, name); 2154 if (ret < 0) { 2155 mlog_errno(ret); 2156 return ret; 2157 } 2158 2159 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2160 orphan_dir_bh, name, 2161 namelen, lookup); 2162 if (ret < 0) { 2163 mlog_errno(ret); 2164 return ret; 2165 } 2166 2167 return 0; 2168 } 2169 2170 /** 2171 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for 2172 * insertion of an orphan. 2173 * @osb: ocfs2 file system 2174 * @ret_orphan_dir: Orphan dir inode - returned locked! 2175 * @blkno: Actual block number of the inode to be inserted into orphan dir. 2176 * @lookup: dir lookup result, to be passed back into functions like 2177 * ocfs2_orphan_add 2178 * 2179 * Returns zero on success and the ret_orphan_dir, name and lookup 2180 * fields will be populated. 2181 * 2182 * Returns non-zero on failure. 2183 */ 2184 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2185 struct inode **ret_orphan_dir, 2186 u64 blkno, 2187 char *name, 2188 struct ocfs2_dir_lookup_result *lookup, 2189 bool dio) 2190 { 2191 struct inode *orphan_dir_inode = NULL; 2192 struct buffer_head *orphan_dir_bh = NULL; 2193 int ret = 0; 2194 2195 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, 2196 &orphan_dir_bh); 2197 if (ret < 0) { 2198 mlog_errno(ret); 2199 return ret; 2200 } 2201 2202 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, 2203 blkno, name, lookup, dio); 2204 if (ret < 0) { 2205 mlog_errno(ret); 2206 goto out; 2207 } 2208 2209 *ret_orphan_dir = orphan_dir_inode; 2210 2211 out: 2212 brelse(orphan_dir_bh); 2213 2214 if (ret) { 2215 ocfs2_inode_unlock(orphan_dir_inode, 1); 2216 inode_unlock(orphan_dir_inode); 2217 iput(orphan_dir_inode); 2218 } 2219 2220 if (ret) 2221 mlog_errno(ret); 2222 return ret; 2223 } 2224 2225 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2226 handle_t *handle, 2227 struct inode *inode, 2228 struct buffer_head *fe_bh, 2229 char *name, 2230 struct ocfs2_dir_lookup_result *lookup, 2231 struct inode *orphan_dir_inode, 2232 bool dio) 2233 { 2234 struct buffer_head *orphan_dir_bh = NULL; 2235 int status = 0; 2236 struct ocfs2_dinode *orphan_fe; 2237 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 2238 int namelen = dio ? 2239 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2240 OCFS2_ORPHAN_NAMELEN; 2241 2242 trace_ocfs2_orphan_add_begin( 2243 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2244 2245 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 2246 if (status < 0) { 2247 mlog_errno(status); 2248 goto leave; 2249 } 2250 2251 status = ocfs2_journal_access_di(handle, 2252 INODE_CACHE(orphan_dir_inode), 2253 orphan_dir_bh, 2254 OCFS2_JOURNAL_ACCESS_WRITE); 2255 if (status < 0) { 2256 mlog_errno(status); 2257 goto leave; 2258 } 2259 2260 /* 2261 * We're going to journal the change of i_flags and i_orphaned_slot. 2262 * It's safe anyway, though some callers may duplicate the journaling. 2263 * Journaling within the func just make the logic look more 2264 * straightforward. 2265 */ 2266 status = ocfs2_journal_access_di(handle, 2267 INODE_CACHE(inode), 2268 fe_bh, 2269 OCFS2_JOURNAL_ACCESS_WRITE); 2270 if (status < 0) { 2271 mlog_errno(status); 2272 goto leave; 2273 } 2274 2275 /* we're a cluster, and nlink can change on disk from 2276 * underneath us... */ 2277 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2278 if (S_ISDIR(inode->i_mode)) 2279 ocfs2_add_links_count(orphan_fe, 1); 2280 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2281 ocfs2_journal_dirty(handle, orphan_dir_bh); 2282 2283 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2284 namelen, inode, 2285 OCFS2_I(inode)->ip_blkno, 2286 orphan_dir_bh, lookup); 2287 if (status < 0) { 2288 mlog_errno(status); 2289 goto rollback; 2290 } 2291 2292 if (dio) { 2293 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan 2294 * slot. 2295 */ 2296 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2297 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); 2298 } else { 2299 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL); 2300 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; 2301 2302 /* Record which orphan dir our inode now resides 2303 * in. delete_inode will use this to determine which orphan 2304 * dir to lock. */ 2305 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2306 } 2307 2308 ocfs2_journal_dirty(handle, fe_bh); 2309 2310 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, 2311 osb->slot_num); 2312 2313 rollback: 2314 if (status < 0) { 2315 if (S_ISDIR(inode->i_mode)) 2316 ocfs2_add_links_count(orphan_fe, -1); 2317 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2318 } 2319 2320 leave: 2321 brelse(orphan_dir_bh); 2322 2323 return status; 2324 } 2325 2326 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2327 int ocfs2_orphan_del(struct ocfs2_super *osb, 2328 handle_t *handle, 2329 struct inode *orphan_dir_inode, 2330 struct inode *inode, 2331 struct buffer_head *orphan_dir_bh, 2332 bool dio) 2333 { 2334 const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN; 2335 char name[namelen + 1]; 2336 struct ocfs2_dinode *orphan_fe; 2337 int status = 0; 2338 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2339 2340 if (dio) { 2341 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2342 OCFS2_DIO_ORPHAN_PREFIX); 2343 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2344 status = -EINVAL; 2345 mlog_errno(status); 2346 return status; 2347 } 2348 2349 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, 2350 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2351 } else 2352 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2353 if (status < 0) { 2354 mlog_errno(status); 2355 goto leave; 2356 } 2357 2358 trace_ocfs2_orphan_del( 2359 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2360 name, strlen(name)); 2361 2362 status = ocfs2_journal_access_di(handle, 2363 INODE_CACHE(orphan_dir_inode), 2364 orphan_dir_bh, 2365 OCFS2_JOURNAL_ACCESS_WRITE); 2366 if (status < 0) { 2367 mlog_errno(status); 2368 goto leave; 2369 } 2370 2371 /* find it's spot in the orphan directory */ 2372 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode, 2373 &lookup); 2374 if (status) { 2375 mlog_errno(status); 2376 goto leave; 2377 } 2378 2379 /* remove it from the orphan directory */ 2380 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); 2381 if (status < 0) { 2382 mlog_errno(status); 2383 goto leave; 2384 } 2385 2386 /* do the i_nlink dance! :) */ 2387 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2388 if (S_ISDIR(inode->i_mode)) 2389 ocfs2_add_links_count(orphan_fe, -1); 2390 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2391 ocfs2_journal_dirty(handle, orphan_dir_bh); 2392 2393 leave: 2394 ocfs2_free_dir_lookup_result(&lookup); 2395 2396 if (status) 2397 mlog_errno(status); 2398 return status; 2399 } 2400 2401 /** 2402 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly 2403 * allocated file. This is different from the typical 'add to orphan dir' 2404 * operation in that the inode does not yet exist. This is a problem because 2405 * the orphan dir stringifies the inode block number to come up with it's 2406 * dirent. Obviously if the inode does not yet exist we have a chicken and egg 2407 * problem. This function works around it by calling deeper into the orphan 2408 * and suballoc code than other callers. Use this only by necessity. 2409 * @dir: The directory which this inode will ultimately wind up under - not the 2410 * orphan dir! 2411 * @dir_bh: buffer_head the @dir inode block 2412 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled 2413 * with the string to be used for orphan dirent. Pass back to the orphan dir 2414 * code. 2415 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan 2416 * dir code. 2417 * @ret_di_blkno: block number where the new inode will be allocated. 2418 * @orphan_insert: Dir insert context to be passed back into orphan dir code. 2419 * @ret_inode_ac: Inode alloc context to be passed back to the allocator. 2420 * 2421 * Returns zero on success and the ret_orphan_dir, name and lookup 2422 * fields will be populated. 2423 * 2424 * Returns non-zero on failure. 2425 */ 2426 static int ocfs2_prep_new_orphaned_file(struct inode *dir, 2427 struct buffer_head *dir_bh, 2428 char *orphan_name, 2429 struct inode **ret_orphan_dir, 2430 u64 *ret_di_blkno, 2431 struct ocfs2_dir_lookup_result *orphan_insert, 2432 struct ocfs2_alloc_context **ret_inode_ac) 2433 { 2434 int ret; 2435 u64 di_blkno; 2436 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2437 struct inode *orphan_dir = NULL; 2438 struct buffer_head *orphan_dir_bh = NULL; 2439 struct ocfs2_alloc_context *inode_ac = NULL; 2440 2441 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); 2442 if (ret < 0) { 2443 mlog_errno(ret); 2444 return ret; 2445 } 2446 2447 /* reserve an inode spot */ 2448 ret = ocfs2_reserve_new_inode(osb, &inode_ac); 2449 if (ret < 0) { 2450 if (ret != -ENOSPC) 2451 mlog_errno(ret); 2452 goto out; 2453 } 2454 2455 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, 2456 &di_blkno); 2457 if (ret) { 2458 mlog_errno(ret); 2459 goto out; 2460 } 2461 2462 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, 2463 di_blkno, orphan_name, orphan_insert, 2464 false); 2465 if (ret < 0) { 2466 mlog_errno(ret); 2467 goto out; 2468 } 2469 2470 out: 2471 if (ret == 0) { 2472 *ret_orphan_dir = orphan_dir; 2473 *ret_di_blkno = di_blkno; 2474 *ret_inode_ac = inode_ac; 2475 /* 2476 * orphan_name and orphan_insert are already up to 2477 * date via prepare_orphan_dir 2478 */ 2479 } else { 2480 /* Unroll reserve_new_inode* */ 2481 if (inode_ac) 2482 ocfs2_free_alloc_context(inode_ac); 2483 2484 /* Unroll orphan dir locking */ 2485 inode_unlock(orphan_dir); 2486 ocfs2_inode_unlock(orphan_dir, 1); 2487 iput(orphan_dir); 2488 } 2489 2490 brelse(orphan_dir_bh); 2491 2492 return ret; 2493 } 2494 2495 int ocfs2_create_inode_in_orphan(struct inode *dir, 2496 int mode, 2497 struct inode **new_inode) 2498 { 2499 int status, did_quota_inode = 0; 2500 struct inode *inode = NULL; 2501 struct inode *orphan_dir = NULL; 2502 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2503 struct ocfs2_dinode *di = NULL; 2504 handle_t *handle = NULL; 2505 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2506 struct buffer_head *parent_di_bh = NULL; 2507 struct buffer_head *new_di_bh = NULL; 2508 struct ocfs2_alloc_context *inode_ac = NULL; 2509 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2510 u64 uninitialized_var(di_blkno), suballoc_loc; 2511 u16 suballoc_bit; 2512 2513 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2514 if (status < 0) { 2515 if (status != -ENOENT) 2516 mlog_errno(status); 2517 return status; 2518 } 2519 2520 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, 2521 orphan_name, &orphan_dir, 2522 &di_blkno, &orphan_insert, &inode_ac); 2523 if (status < 0) { 2524 if (status != -ENOSPC) 2525 mlog_errno(status); 2526 goto leave; 2527 } 2528 2529 inode = ocfs2_get_init_inode(dir, mode); 2530 if (IS_ERR(inode)) { 2531 status = PTR_ERR(inode); 2532 inode = NULL; 2533 mlog_errno(status); 2534 goto leave; 2535 } 2536 2537 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2538 if (IS_ERR(handle)) { 2539 status = PTR_ERR(handle); 2540 handle = NULL; 2541 mlog_errno(status); 2542 goto leave; 2543 } 2544 2545 status = dquot_alloc_inode(inode); 2546 if (status) 2547 goto leave; 2548 did_quota_inode = 1; 2549 2550 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, 2551 &suballoc_loc, 2552 &suballoc_bit, di_blkno); 2553 if (status < 0) { 2554 mlog_errno(status); 2555 goto leave; 2556 } 2557 2558 clear_nlink(inode); 2559 /* do the real work now. */ 2560 status = __ocfs2_mknod_locked(dir, inode, 2561 0, &new_di_bh, parent_di_bh, handle, 2562 inode_ac, di_blkno, suballoc_loc, 2563 suballoc_bit); 2564 if (status < 0) { 2565 mlog_errno(status); 2566 goto leave; 2567 } 2568 2569 di = (struct ocfs2_dinode *)new_di_bh->b_data; 2570 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, 2571 &orphan_insert, orphan_dir, false); 2572 if (status < 0) { 2573 mlog_errno(status); 2574 goto leave; 2575 } 2576 2577 /* get open lock so that only nodes can't remove it from orphan dir. */ 2578 status = ocfs2_open_lock(inode); 2579 if (status < 0) 2580 mlog_errno(status); 2581 2582 insert_inode_hash(inode); 2583 leave: 2584 if (status < 0 && did_quota_inode) 2585 dquot_free_inode(inode); 2586 if (handle) 2587 ocfs2_commit_trans(osb, handle); 2588 2589 if (orphan_dir) { 2590 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2591 ocfs2_inode_unlock(orphan_dir, 1); 2592 inode_unlock(orphan_dir); 2593 iput(orphan_dir); 2594 } 2595 2596 if ((status < 0) && inode) { 2597 clear_nlink(inode); 2598 iput(inode); 2599 } 2600 2601 if (inode_ac) 2602 ocfs2_free_alloc_context(inode_ac); 2603 2604 brelse(new_di_bh); 2605 2606 if (!status) 2607 *new_inode = inode; 2608 2609 ocfs2_free_dir_lookup_result(&orphan_insert); 2610 2611 ocfs2_inode_unlock(dir, 1); 2612 brelse(parent_di_bh); 2613 return status; 2614 } 2615 2616 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, 2617 struct inode *inode) 2618 { 2619 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2620 struct inode *orphan_dir_inode = NULL; 2621 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2622 struct buffer_head *di_bh = NULL; 2623 int status = 0; 2624 handle_t *handle = NULL; 2625 struct ocfs2_dinode *di = NULL; 2626 2627 status = ocfs2_inode_lock(inode, &di_bh, 1); 2628 if (status < 0) { 2629 mlog_errno(status); 2630 goto bail; 2631 } 2632 2633 di = (struct ocfs2_dinode *) di_bh->b_data; 2634 /* 2635 * Another append dio crashed? 2636 * If so, manually recover it first. 2637 */ 2638 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 2639 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode)); 2640 if (status < 0) { 2641 if (status != -ENOSPC) 2642 mlog_errno(status); 2643 goto bail_unlock_inode; 2644 } 2645 2646 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0); 2647 if (status < 0) { 2648 mlog_errno(status); 2649 goto bail_unlock_inode; 2650 } 2651 } 2652 2653 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, 2654 OCFS2_I(inode)->ip_blkno, 2655 orphan_name, 2656 &orphan_insert, 2657 true); 2658 if (status < 0) { 2659 mlog_errno(status); 2660 goto bail_unlock_inode; 2661 } 2662 2663 handle = ocfs2_start_trans(osb, 2664 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); 2665 if (IS_ERR(handle)) { 2666 status = PTR_ERR(handle); 2667 goto bail_unlock_orphan; 2668 } 2669 2670 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, 2671 &orphan_insert, orphan_dir_inode, true); 2672 if (status) 2673 mlog_errno(status); 2674 2675 ocfs2_commit_trans(osb, handle); 2676 2677 bail_unlock_orphan: 2678 ocfs2_inode_unlock(orphan_dir_inode, 1); 2679 inode_unlock(orphan_dir_inode); 2680 iput(orphan_dir_inode); 2681 2682 ocfs2_free_dir_lookup_result(&orphan_insert); 2683 2684 bail_unlock_inode: 2685 ocfs2_inode_unlock(inode, 1); 2686 brelse(di_bh); 2687 2688 bail: 2689 return status; 2690 } 2691 2692 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, 2693 struct inode *inode, struct buffer_head *di_bh, 2694 int update_isize, loff_t end) 2695 { 2696 struct inode *orphan_dir_inode = NULL; 2697 struct buffer_head *orphan_dir_bh = NULL; 2698 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2699 handle_t *handle = NULL; 2700 int status = 0; 2701 2702 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2703 ORPHAN_DIR_SYSTEM_INODE, 2704 le16_to_cpu(di->i_dio_orphaned_slot)); 2705 if (!orphan_dir_inode) { 2706 status = -ENOENT; 2707 mlog_errno(status); 2708 goto bail; 2709 } 2710 2711 inode_lock(orphan_dir_inode); 2712 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2713 if (status < 0) { 2714 inode_unlock(orphan_dir_inode); 2715 iput(orphan_dir_inode); 2716 mlog_errno(status); 2717 goto bail; 2718 } 2719 2720 handle = ocfs2_start_trans(osb, 2721 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); 2722 if (IS_ERR(handle)) { 2723 status = PTR_ERR(handle); 2724 goto bail_unlock_orphan; 2725 } 2726 2727 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); 2728 2729 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, 2730 inode, orphan_dir_bh, true); 2731 if (status < 0) { 2732 mlog_errno(status); 2733 goto bail_commit; 2734 } 2735 2736 status = ocfs2_journal_access_di(handle, 2737 INODE_CACHE(inode), 2738 di_bh, 2739 OCFS2_JOURNAL_ACCESS_WRITE); 2740 if (status < 0) { 2741 mlog_errno(status); 2742 goto bail_commit; 2743 } 2744 2745 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2746 di->i_dio_orphaned_slot = 0; 2747 2748 if (update_isize) { 2749 status = ocfs2_set_inode_size(handle, inode, di_bh, end); 2750 if (status) 2751 mlog_errno(status); 2752 } else 2753 ocfs2_journal_dirty(handle, di_bh); 2754 2755 bail_commit: 2756 ocfs2_commit_trans(osb, handle); 2757 2758 bail_unlock_orphan: 2759 ocfs2_inode_unlock(orphan_dir_inode, 1); 2760 inode_unlock(orphan_dir_inode); 2761 brelse(orphan_dir_bh); 2762 iput(orphan_dir_inode); 2763 2764 bail: 2765 return status; 2766 } 2767 2768 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2769 struct inode *inode, 2770 struct dentry *dentry) 2771 { 2772 int status = 0; 2773 struct buffer_head *parent_di_bh = NULL; 2774 handle_t *handle = NULL; 2775 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2776 struct ocfs2_dinode *dir_di, *di; 2777 struct inode *orphan_dir_inode = NULL; 2778 struct buffer_head *orphan_dir_bh = NULL; 2779 struct buffer_head *di_bh = NULL; 2780 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2781 2782 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, 2783 dentry->d_name.len, dentry->d_name.name, 2784 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2785 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2786 2787 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2788 if (status < 0) { 2789 if (status != -ENOENT) 2790 mlog_errno(status); 2791 return status; 2792 } 2793 2794 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2795 if (!dir_di->i_links_count) { 2796 /* can't make a file in a deleted directory. */ 2797 status = -ENOENT; 2798 goto leave; 2799 } 2800 2801 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2802 dentry->d_name.len); 2803 if (status) 2804 goto leave; 2805 2806 /* get a spot inside the dir. */ 2807 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2808 dentry->d_name.name, 2809 dentry->d_name.len, &lookup); 2810 if (status < 0) { 2811 mlog_errno(status); 2812 goto leave; 2813 } 2814 2815 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2816 ORPHAN_DIR_SYSTEM_INODE, 2817 osb->slot_num); 2818 if (!orphan_dir_inode) { 2819 status = -ENOENT; 2820 mlog_errno(status); 2821 goto leave; 2822 } 2823 2824 inode_lock(orphan_dir_inode); 2825 2826 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2827 if (status < 0) { 2828 mlog_errno(status); 2829 inode_unlock(orphan_dir_inode); 2830 iput(orphan_dir_inode); 2831 goto leave; 2832 } 2833 2834 status = ocfs2_read_inode_block(inode, &di_bh); 2835 if (status < 0) { 2836 mlog_errno(status); 2837 goto orphan_unlock; 2838 } 2839 2840 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2841 if (IS_ERR(handle)) { 2842 status = PTR_ERR(handle); 2843 handle = NULL; 2844 mlog_errno(status); 2845 goto orphan_unlock; 2846 } 2847 2848 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2849 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2850 if (status < 0) { 2851 mlog_errno(status); 2852 goto out_commit; 2853 } 2854 2855 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2856 orphan_dir_bh, false); 2857 if (status < 0) { 2858 mlog_errno(status); 2859 goto out_commit; 2860 } 2861 2862 di = (struct ocfs2_dinode *)di_bh->b_data; 2863 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); 2864 di->i_orphaned_slot = 0; 2865 set_nlink(inode, 1); 2866 ocfs2_set_links_count(di, inode->i_nlink); 2867 ocfs2_update_inode_fsync_trans(handle, inode, 1); 2868 ocfs2_journal_dirty(handle, di_bh); 2869 2870 status = ocfs2_add_entry(handle, dentry, inode, 2871 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2872 &lookup); 2873 if (status < 0) { 2874 mlog_errno(status); 2875 goto out_commit; 2876 } 2877 2878 status = ocfs2_dentry_attach_lock(dentry, inode, 2879 OCFS2_I(dir)->ip_blkno); 2880 if (status) { 2881 mlog_errno(status); 2882 goto out_commit; 2883 } 2884 2885 d_instantiate(dentry, inode); 2886 status = 0; 2887 out_commit: 2888 ocfs2_commit_trans(osb, handle); 2889 orphan_unlock: 2890 ocfs2_inode_unlock(orphan_dir_inode, 1); 2891 inode_unlock(orphan_dir_inode); 2892 iput(orphan_dir_inode); 2893 leave: 2894 2895 ocfs2_inode_unlock(dir, 1); 2896 2897 brelse(di_bh); 2898 brelse(parent_di_bh); 2899 brelse(orphan_dir_bh); 2900 2901 ocfs2_free_dir_lookup_result(&lookup); 2902 2903 if (status) 2904 mlog_errno(status); 2905 2906 return status; 2907 } 2908 2909 const struct inode_operations ocfs2_dir_iops = { 2910 .create = ocfs2_create, 2911 .lookup = ocfs2_lookup, 2912 .link = ocfs2_link, 2913 .unlink = ocfs2_unlink, 2914 .rmdir = ocfs2_unlink, 2915 .symlink = ocfs2_symlink, 2916 .mkdir = ocfs2_mkdir, 2917 .mknod = ocfs2_mknod, 2918 .rename = ocfs2_rename, 2919 .setattr = ocfs2_setattr, 2920 .getattr = ocfs2_getattr, 2921 .permission = ocfs2_permission, 2922 .listxattr = ocfs2_listxattr, 2923 .fiemap = ocfs2_fiemap, 2924 .get_acl = ocfs2_iop_get_acl, 2925 .set_acl = ocfs2_iop_set_acl, 2926 }; 2927