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 #define OCFS2_DIO_ORPHAN_PREFIX "dio-" 110 #define OCFS2_DIO_ORPHAN_PREFIX_LEN 4 111 112 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, 113 unsigned int flags) 114 { 115 int status; 116 u64 blkno; 117 struct inode *inode = NULL; 118 struct dentry *ret; 119 struct ocfs2_inode_info *oi; 120 121 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len, 122 dentry->d_name.name, 123 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0); 124 125 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { 126 ret = ERR_PTR(-ENAMETOOLONG); 127 goto bail; 128 } 129 130 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT); 131 if (status < 0) { 132 if (status != -ENOENT) 133 mlog_errno(status); 134 ret = ERR_PTR(status); 135 goto bail; 136 } 137 138 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name, 139 dentry->d_name.len, &blkno); 140 if (status < 0) 141 goto bail_add; 142 143 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0); 144 if (IS_ERR(inode)) { 145 ret = ERR_PTR(-EACCES); 146 goto bail_unlock; 147 } 148 149 oi = OCFS2_I(inode); 150 /* Clear any orphaned state... If we were able to look up the 151 * inode from a directory, it certainly can't be orphaned. We 152 * might have the bad state from a node which intended to 153 * orphan this inode but crashed before it could commit the 154 * unlink. */ 155 spin_lock(&oi->ip_lock); 156 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; 157 spin_unlock(&oi->ip_lock); 158 159 bail_add: 160 ret = d_splice_alias(inode, dentry); 161 162 if (inode) { 163 /* 164 * If d_splice_alias() finds a DCACHE_DISCONNECTED 165 * dentry, it will d_move() it on top of ourse. The 166 * return value will indicate this however, so in 167 * those cases, we switch them around for the locking 168 * code. 169 * 170 * NOTE: This dentry already has ->d_op set from 171 * ocfs2_get_parent() and ocfs2_get_dentry() 172 */ 173 if (!IS_ERR_OR_NULL(ret)) 174 dentry = ret; 175 176 status = ocfs2_dentry_attach_lock(dentry, inode, 177 OCFS2_I(dir)->ip_blkno); 178 if (status) { 179 mlog_errno(status); 180 ret = ERR_PTR(status); 181 goto bail_unlock; 182 } 183 } else 184 ocfs2_dentry_attach_gen(dentry); 185 186 bail_unlock: 187 /* Don't drop the cluster lock until *after* the d_add -- 188 * unlink on another node will message us to remove that 189 * dentry under this lock so otherwise we can race this with 190 * the downconvert thread and have a stale dentry. */ 191 ocfs2_inode_unlock(dir, 0); 192 193 bail: 194 195 trace_ocfs2_lookup_ret(ret); 196 197 return ret; 198 } 199 200 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode) 201 { 202 struct inode *inode; 203 int status; 204 205 inode = new_inode(dir->i_sb); 206 if (!inode) { 207 mlog(ML_ERROR, "new_inode failed!\n"); 208 return ERR_PTR(-ENOMEM); 209 } 210 211 /* populate as many fields early on as possible - many of 212 * these are used by the support functions here and in 213 * callers. */ 214 if (S_ISDIR(mode)) 215 set_nlink(inode, 2); 216 inode_init_owner(inode, dir, mode); 217 status = dquot_initialize(inode); 218 if (status) 219 return ERR_PTR(status); 220 221 return inode; 222 } 223 224 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb, 225 struct dentry *dentry, struct inode *inode) 226 { 227 struct ocfs2_dentry_lock *dl = dentry->d_fsdata; 228 229 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres); 230 ocfs2_lock_res_free(&dl->dl_lockres); 231 BUG_ON(dl->dl_count != 1); 232 spin_lock(&dentry_attach_lock); 233 dentry->d_fsdata = NULL; 234 spin_unlock(&dentry_attach_lock); 235 kfree(dl); 236 iput(inode); 237 } 238 239 static int ocfs2_mknod(struct inode *dir, 240 struct dentry *dentry, 241 umode_t mode, 242 dev_t dev) 243 { 244 int status = 0; 245 struct buffer_head *parent_fe_bh = NULL; 246 handle_t *handle = NULL; 247 struct ocfs2_super *osb; 248 struct ocfs2_dinode *dirfe; 249 struct buffer_head *new_fe_bh = NULL; 250 struct inode *inode = NULL; 251 struct ocfs2_alloc_context *inode_ac = NULL; 252 struct ocfs2_alloc_context *data_ac = NULL; 253 struct ocfs2_alloc_context *meta_ac = NULL; 254 int want_clusters = 0; 255 int want_meta = 0; 256 int xattr_credits = 0; 257 struct ocfs2_security_xattr_info si = { 258 .enable = 1, 259 }; 260 int did_quota_inode = 0; 261 struct ocfs2_dir_lookup_result lookup = { NULL, }; 262 sigset_t oldset; 263 int did_block_signals = 0; 264 struct posix_acl *default_acl = NULL, *acl = NULL; 265 struct ocfs2_dentry_lock *dl = NULL; 266 267 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name, 268 (unsigned long long)OCFS2_I(dir)->ip_blkno, 269 (unsigned long)dev, mode); 270 271 status = dquot_initialize(dir); 272 if (status) { 273 mlog_errno(status); 274 return status; 275 } 276 277 /* get our super block */ 278 osb = OCFS2_SB(dir->i_sb); 279 280 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 281 if (status < 0) { 282 if (status != -ENOENT) 283 mlog_errno(status); 284 return status; 285 } 286 287 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) { 288 status = -EMLINK; 289 goto leave; 290 } 291 292 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 293 if (!ocfs2_read_links_count(dirfe)) { 294 /* can't make a file in a deleted directory. */ 295 status = -ENOENT; 296 goto leave; 297 } 298 299 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 300 dentry->d_name.len); 301 if (status) 302 goto leave; 303 304 /* get a spot inside the dir. */ 305 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 306 dentry->d_name.name, 307 dentry->d_name.len, &lookup); 308 if (status < 0) { 309 mlog_errno(status); 310 goto leave; 311 } 312 313 /* reserve an inode spot */ 314 status = ocfs2_reserve_new_inode(osb, &inode_ac); 315 if (status < 0) { 316 if (status != -ENOSPC) 317 mlog_errno(status); 318 goto leave; 319 } 320 321 inode = ocfs2_get_init_inode(dir, mode); 322 if (IS_ERR(inode)) { 323 status = PTR_ERR(inode); 324 inode = NULL; 325 mlog_errno(status); 326 goto leave; 327 } 328 329 /* get security xattr */ 330 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 331 if (status) { 332 if (status == -EOPNOTSUPP) 333 si.enable = 0; 334 else { 335 mlog_errno(status); 336 goto leave; 337 } 338 } 339 340 /* calculate meta data/clusters for setting security and acl xattr */ 341 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode, 342 &si, &want_clusters, 343 &xattr_credits, &want_meta); 344 if (status < 0) { 345 mlog_errno(status); 346 goto leave; 347 } 348 349 /* Reserve a cluster if creating an extent based directory. */ 350 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { 351 want_clusters += 1; 352 353 /* Dir indexing requires extra space as well */ 354 if (ocfs2_supports_indexed_dirs(osb)) 355 want_meta++; 356 } 357 358 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac); 359 if (status < 0) { 360 if (status != -ENOSPC) 361 mlog_errno(status); 362 goto leave; 363 } 364 365 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 366 if (status < 0) { 367 if (status != -ENOSPC) 368 mlog_errno(status); 369 goto leave; 370 } 371 372 status = posix_acl_create(dir, &mode, &default_acl, &acl); 373 if (status) { 374 mlog_errno(status); 375 goto leave; 376 } 377 378 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 379 S_ISDIR(mode), 380 xattr_credits)); 381 if (IS_ERR(handle)) { 382 status = PTR_ERR(handle); 383 handle = NULL; 384 mlog_errno(status); 385 goto leave; 386 } 387 388 /* Starting to change things, restart is no longer possible. */ 389 ocfs2_block_signals(&oldset); 390 did_block_signals = 1; 391 392 status = dquot_alloc_inode(inode); 393 if (status) 394 goto leave; 395 did_quota_inode = 1; 396 397 /* do the real work now. */ 398 status = ocfs2_mknod_locked(osb, dir, inode, dev, 399 &new_fe_bh, parent_fe_bh, handle, 400 inode_ac); 401 if (status < 0) { 402 mlog_errno(status); 403 goto leave; 404 } 405 406 if (S_ISDIR(mode)) { 407 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 408 new_fe_bh, data_ac, meta_ac); 409 if (status < 0) { 410 mlog_errno(status); 411 goto leave; 412 } 413 414 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir), 415 parent_fe_bh, 416 OCFS2_JOURNAL_ACCESS_WRITE); 417 if (status < 0) { 418 mlog_errno(status); 419 goto leave; 420 } 421 ocfs2_add_links_count(dirfe, 1); 422 ocfs2_journal_dirty(handle, parent_fe_bh); 423 inc_nlink(dir); 424 } 425 426 if (default_acl) { 427 status = ocfs2_set_acl(handle, inode, new_fe_bh, 428 ACL_TYPE_DEFAULT, default_acl, 429 meta_ac, data_ac); 430 } 431 if (!status && acl) { 432 status = ocfs2_set_acl(handle, inode, new_fe_bh, 433 ACL_TYPE_ACCESS, acl, 434 meta_ac, data_ac); 435 } 436 437 if (status < 0) { 438 mlog_errno(status); 439 goto leave; 440 } 441 442 if (si.enable) { 443 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 444 meta_ac, data_ac); 445 if (status < 0) { 446 mlog_errno(status); 447 goto leave; 448 } 449 } 450 451 /* 452 * Do this before adding the entry to the directory. We add 453 * also set d_op after success so that ->d_iput() will cleanup 454 * the dentry lock even if ocfs2_add_entry() fails below. 455 */ 456 status = ocfs2_dentry_attach_lock(dentry, inode, 457 OCFS2_I(dir)->ip_blkno); 458 if (status) { 459 mlog_errno(status); 460 goto leave; 461 } 462 463 dl = dentry->d_fsdata; 464 465 status = ocfs2_add_entry(handle, dentry, inode, 466 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 467 &lookup); 468 if (status < 0) { 469 mlog_errno(status); 470 goto leave; 471 } 472 473 insert_inode_hash(inode); 474 d_instantiate(dentry, inode); 475 status = 0; 476 leave: 477 if (default_acl) 478 posix_acl_release(default_acl); 479 if (acl) 480 posix_acl_release(acl); 481 if (status < 0 && did_quota_inode) 482 dquot_free_inode(inode); 483 if (handle) 484 ocfs2_commit_trans(osb, handle); 485 486 ocfs2_inode_unlock(dir, 1); 487 if (did_block_signals) 488 ocfs2_unblock_signals(&oldset); 489 490 brelse(new_fe_bh); 491 brelse(parent_fe_bh); 492 kfree(si.value); 493 494 ocfs2_free_dir_lookup_result(&lookup); 495 496 if (inode_ac) 497 ocfs2_free_alloc_context(inode_ac); 498 499 if (data_ac) 500 ocfs2_free_alloc_context(data_ac); 501 502 if (meta_ac) 503 ocfs2_free_alloc_context(meta_ac); 504 505 /* 506 * We should call iput after the i_mutex of the bitmap been 507 * unlocked in ocfs2_free_alloc_context, or the 508 * ocfs2_delete_inode will mutex_lock again. 509 */ 510 if ((status < 0) && inode) { 511 if (dl) 512 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 513 514 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 515 clear_nlink(inode); 516 iput(inode); 517 } 518 519 if (status) 520 mlog_errno(status); 521 522 return status; 523 } 524 525 static int __ocfs2_mknod_locked(struct inode *dir, 526 struct inode *inode, 527 dev_t dev, 528 struct buffer_head **new_fe_bh, 529 struct buffer_head *parent_fe_bh, 530 handle_t *handle, 531 struct ocfs2_alloc_context *inode_ac, 532 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit) 533 { 534 int status = 0; 535 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 536 struct ocfs2_dinode *fe = NULL; 537 struct ocfs2_extent_list *fel; 538 u16 feat; 539 struct ocfs2_inode_info *oi = OCFS2_I(inode); 540 541 *new_fe_bh = NULL; 542 543 /* populate as many fields early on as possible - many of 544 * these are used by the support functions here and in 545 * callers. */ 546 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 547 OCFS2_I(inode)->ip_blkno = fe_blkno; 548 spin_lock(&osb->osb_lock); 549 inode->i_generation = osb->s_next_generation++; 550 spin_unlock(&osb->osb_lock); 551 552 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 553 if (!*new_fe_bh) { 554 status = -ENOMEM; 555 mlog_errno(status); 556 goto leave; 557 } 558 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh); 559 560 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 561 *new_fe_bh, 562 OCFS2_JOURNAL_ACCESS_CREATE); 563 if (status < 0) { 564 mlog_errno(status); 565 goto leave; 566 } 567 568 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 569 memset(fe, 0, osb->sb->s_blocksize); 570 571 fe->i_generation = cpu_to_le32(inode->i_generation); 572 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 573 fe->i_blkno = cpu_to_le64(fe_blkno); 574 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc); 575 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 576 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); 577 fe->i_uid = cpu_to_le32(i_uid_read(inode)); 578 fe->i_gid = cpu_to_le32(i_gid_read(inode)); 579 fe->i_mode = cpu_to_le16(inode->i_mode); 580 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 581 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 582 583 ocfs2_set_links_count(fe, inode->i_nlink); 584 585 fe->i_last_eb_blk = 0; 586 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 587 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL); 588 fe->i_atime = fe->i_ctime = fe->i_mtime = 589 cpu_to_le64(CURRENT_TIME.tv_sec); 590 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 591 cpu_to_le32(CURRENT_TIME.tv_nsec); 592 fe->i_dtime = 0; 593 594 /* 595 * If supported, directories start with inline data. If inline 596 * isn't supported, but indexing is, we start them as indexed. 597 */ 598 feat = le16_to_cpu(fe->i_dyn_features); 599 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) { 600 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); 601 602 fe->id2.i_data.id_count = cpu_to_le16( 603 ocfs2_max_inline_data_with_xattr(osb->sb, fe)); 604 } else { 605 fel = &fe->id2.i_list; 606 fel->l_tree_depth = 0; 607 fel->l_next_free_rec = 0; 608 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 609 } 610 611 ocfs2_journal_dirty(handle, *new_fe_bh); 612 613 ocfs2_populate_inode(inode, fe, 1); 614 ocfs2_ci_set_new(osb, INODE_CACHE(inode)); 615 if (!ocfs2_mount_local(osb)) { 616 status = ocfs2_create_new_inode_locks(inode); 617 if (status < 0) 618 mlog_errno(status); 619 } 620 621 oi->i_sync_tid = handle->h_transaction->t_tid; 622 oi->i_datasync_tid = handle->h_transaction->t_tid; 623 624 leave: 625 if (status < 0) { 626 if (*new_fe_bh) { 627 brelse(*new_fe_bh); 628 *new_fe_bh = NULL; 629 } 630 } 631 632 if (status) 633 mlog_errno(status); 634 return status; 635 } 636 637 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 638 struct inode *dir, 639 struct inode *inode, 640 dev_t dev, 641 struct buffer_head **new_fe_bh, 642 struct buffer_head *parent_fe_bh, 643 handle_t *handle, 644 struct ocfs2_alloc_context *inode_ac) 645 { 646 int status = 0; 647 u64 suballoc_loc, fe_blkno = 0; 648 u16 suballoc_bit; 649 650 *new_fe_bh = NULL; 651 652 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh, 653 inode_ac, &suballoc_loc, 654 &suballoc_bit, &fe_blkno); 655 if (status < 0) { 656 mlog_errno(status); 657 return status; 658 } 659 660 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, 661 parent_fe_bh, handle, inode_ac, 662 fe_blkno, suballoc_loc, suballoc_bit); 663 } 664 665 static int ocfs2_mkdir(struct inode *dir, 666 struct dentry *dentry, 667 umode_t mode) 668 { 669 int ret; 670 671 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, 672 OCFS2_I(dir)->ip_blkno, mode); 673 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); 674 if (ret) 675 mlog_errno(ret); 676 677 return ret; 678 } 679 680 static int ocfs2_create(struct inode *dir, 681 struct dentry *dentry, 682 umode_t mode, 683 bool excl) 684 { 685 int ret; 686 687 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name, 688 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode); 689 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); 690 if (ret) 691 mlog_errno(ret); 692 693 return ret; 694 } 695 696 static int ocfs2_link(struct dentry *old_dentry, 697 struct inode *dir, 698 struct dentry *dentry) 699 { 700 handle_t *handle; 701 struct inode *inode = d_inode(old_dentry); 702 struct inode *old_dir = d_inode(old_dentry->d_parent); 703 int err; 704 struct buffer_head *fe_bh = NULL; 705 struct buffer_head *old_dir_bh = NULL; 706 struct buffer_head *parent_fe_bh = NULL; 707 struct ocfs2_dinode *fe = NULL; 708 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 709 struct ocfs2_dir_lookup_result lookup = { NULL, }; 710 sigset_t oldset; 711 u64 old_de_ino; 712 713 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno, 714 old_dentry->d_name.len, old_dentry->d_name.name, 715 dentry->d_name.len, dentry->d_name.name); 716 717 if (S_ISDIR(inode->i_mode)) 718 return -EPERM; 719 720 err = dquot_initialize(dir); 721 if (err) { 722 mlog_errno(err); 723 return err; 724 } 725 726 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 727 &parent_fe_bh, dir, 0); 728 if (err < 0) { 729 if (err != -ENOENT) 730 mlog_errno(err); 731 return err; 732 } 733 734 /* make sure both dirs have bhs 735 * get an extra ref on old_dir_bh if old==new */ 736 if (!parent_fe_bh) { 737 if (old_dir_bh) { 738 parent_fe_bh = old_dir_bh; 739 get_bh(parent_fe_bh); 740 } else { 741 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str); 742 err = -EIO; 743 goto out; 744 } 745 } 746 747 if (!dir->i_nlink) { 748 err = -ENOENT; 749 goto out; 750 } 751 752 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 753 old_dentry->d_name.len, &old_de_ino); 754 if (err) { 755 err = -ENOENT; 756 goto out; 757 } 758 759 /* 760 * Check whether another node removed the source inode while we 761 * were in the vfs. 762 */ 763 if (old_de_ino != OCFS2_I(inode)->ip_blkno) { 764 err = -ENOENT; 765 goto out; 766 } 767 768 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 769 dentry->d_name.len); 770 if (err) 771 goto out; 772 773 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 774 dentry->d_name.name, 775 dentry->d_name.len, &lookup); 776 if (err < 0) { 777 mlog_errno(err); 778 goto out; 779 } 780 781 err = ocfs2_inode_lock(inode, &fe_bh, 1); 782 if (err < 0) { 783 if (err != -ENOENT) 784 mlog_errno(err); 785 goto out; 786 } 787 788 fe = (struct ocfs2_dinode *) fe_bh->b_data; 789 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { 790 err = -EMLINK; 791 goto out_unlock_inode; 792 } 793 794 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); 795 if (IS_ERR(handle)) { 796 err = PTR_ERR(handle); 797 handle = NULL; 798 mlog_errno(err); 799 goto out_unlock_inode; 800 } 801 802 /* Starting to change things, restart is no longer possible. */ 803 ocfs2_block_signals(&oldset); 804 805 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 806 OCFS2_JOURNAL_ACCESS_WRITE); 807 if (err < 0) { 808 mlog_errno(err); 809 goto out_commit; 810 } 811 812 inc_nlink(inode); 813 inode->i_ctime = CURRENT_TIME; 814 ocfs2_set_links_count(fe, inode->i_nlink); 815 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 816 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 817 ocfs2_journal_dirty(handle, fe_bh); 818 819 err = ocfs2_add_entry(handle, dentry, inode, 820 OCFS2_I(inode)->ip_blkno, 821 parent_fe_bh, &lookup); 822 if (err) { 823 ocfs2_add_links_count(fe, -1); 824 drop_nlink(inode); 825 mlog_errno(err); 826 goto out_commit; 827 } 828 829 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 830 if (err) { 831 mlog_errno(err); 832 goto out_commit; 833 } 834 835 ihold(inode); 836 d_instantiate(dentry, inode); 837 838 out_commit: 839 ocfs2_commit_trans(osb, handle); 840 ocfs2_unblock_signals(&oldset); 841 out_unlock_inode: 842 ocfs2_inode_unlock(inode, 1); 843 844 out: 845 ocfs2_double_unlock(old_dir, dir); 846 847 brelse(fe_bh); 848 brelse(parent_fe_bh); 849 brelse(old_dir_bh); 850 851 ocfs2_free_dir_lookup_result(&lookup); 852 853 if (err) 854 mlog_errno(err); 855 856 return err; 857 } 858 859 /* 860 * Takes and drops an exclusive lock on the given dentry. This will 861 * force other nodes to drop it. 862 */ 863 static int ocfs2_remote_dentry_delete(struct dentry *dentry) 864 { 865 int ret; 866 867 ret = ocfs2_dentry_lock(dentry, 1); 868 if (ret) 869 mlog_errno(ret); 870 else 871 ocfs2_dentry_unlock(dentry, 1); 872 873 return ret; 874 } 875 876 static inline int ocfs2_inode_is_unlinkable(struct inode *inode) 877 { 878 if (S_ISDIR(inode->i_mode)) { 879 if (inode->i_nlink == 2) 880 return 1; 881 return 0; 882 } 883 884 if (inode->i_nlink == 1) 885 return 1; 886 return 0; 887 } 888 889 static int ocfs2_unlink(struct inode *dir, 890 struct dentry *dentry) 891 { 892 int status; 893 int child_locked = 0; 894 bool is_unlinkable = false; 895 struct inode *inode = d_inode(dentry); 896 struct inode *orphan_dir = NULL; 897 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 898 u64 blkno; 899 struct ocfs2_dinode *fe = NULL; 900 struct buffer_head *fe_bh = NULL; 901 struct buffer_head *parent_node_bh = NULL; 902 handle_t *handle = NULL; 903 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 904 struct ocfs2_dir_lookup_result lookup = { NULL, }; 905 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 906 907 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, 908 dentry->d_name.name, 909 (unsigned long long)OCFS2_I(dir)->ip_blkno, 910 (unsigned long long)OCFS2_I(inode)->ip_blkno); 911 912 status = dquot_initialize(dir); 913 if (status) { 914 mlog_errno(status); 915 return status; 916 } 917 918 BUG_ON(d_inode(dentry->d_parent) != dir); 919 920 if (inode == osb->root_inode) 921 return -EPERM; 922 923 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 924 OI_LS_PARENT); 925 if (status < 0) { 926 if (status != -ENOENT) 927 mlog_errno(status); 928 return status; 929 } 930 931 status = ocfs2_find_files_on_disk(dentry->d_name.name, 932 dentry->d_name.len, &blkno, dir, 933 &lookup); 934 if (status < 0) { 935 if (status != -ENOENT) 936 mlog_errno(status); 937 goto leave; 938 } 939 940 if (OCFS2_I(inode)->ip_blkno != blkno) { 941 status = -ENOENT; 942 943 trace_ocfs2_unlink_noent( 944 (unsigned long long)OCFS2_I(inode)->ip_blkno, 945 (unsigned long long)blkno, 946 OCFS2_I(inode)->ip_flags); 947 goto leave; 948 } 949 950 status = ocfs2_inode_lock(inode, &fe_bh, 1); 951 if (status < 0) { 952 if (status != -ENOENT) 953 mlog_errno(status); 954 goto leave; 955 } 956 child_locked = 1; 957 958 if (S_ISDIR(inode->i_mode)) { 959 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 960 status = -ENOTEMPTY; 961 goto leave; 962 } 963 } 964 965 status = ocfs2_remote_dentry_delete(dentry); 966 if (status < 0) { 967 /* This remote delete should succeed under all normal 968 * circumstances. */ 969 mlog_errno(status); 970 goto leave; 971 } 972 973 if (ocfs2_inode_is_unlinkable(inode)) { 974 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 975 OCFS2_I(inode)->ip_blkno, 976 orphan_name, &orphan_insert, 977 false); 978 if (status < 0) { 979 mlog_errno(status); 980 goto leave; 981 } 982 is_unlinkable = true; 983 } 984 985 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 986 if (IS_ERR(handle)) { 987 status = PTR_ERR(handle); 988 handle = NULL; 989 mlog_errno(status); 990 goto leave; 991 } 992 993 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 994 OCFS2_JOURNAL_ACCESS_WRITE); 995 if (status < 0) { 996 mlog_errno(status); 997 goto leave; 998 } 999 1000 fe = (struct ocfs2_dinode *) fe_bh->b_data; 1001 1002 /* delete the name from the parent dir */ 1003 status = ocfs2_delete_entry(handle, dir, &lookup); 1004 if (status < 0) { 1005 mlog_errno(status); 1006 goto leave; 1007 } 1008 1009 if (S_ISDIR(inode->i_mode)) 1010 drop_nlink(inode); 1011 drop_nlink(inode); 1012 ocfs2_set_links_count(fe, inode->i_nlink); 1013 ocfs2_journal_dirty(handle, fe_bh); 1014 1015 dir->i_ctime = dir->i_mtime = CURRENT_TIME; 1016 if (S_ISDIR(inode->i_mode)) 1017 drop_nlink(dir); 1018 1019 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 1020 if (status < 0) { 1021 mlog_errno(status); 1022 if (S_ISDIR(inode->i_mode)) 1023 inc_nlink(dir); 1024 goto leave; 1025 } 1026 1027 if (is_unlinkable) { 1028 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, 1029 orphan_name, &orphan_insert, orphan_dir, false); 1030 if (status < 0) 1031 mlog_errno(status); 1032 } 1033 1034 leave: 1035 if (handle) 1036 ocfs2_commit_trans(osb, handle); 1037 1038 if (orphan_dir) { 1039 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1040 ocfs2_inode_unlock(orphan_dir, 1); 1041 mutex_unlock(&orphan_dir->i_mutex); 1042 iput(orphan_dir); 1043 } 1044 1045 if (child_locked) 1046 ocfs2_inode_unlock(inode, 1); 1047 1048 ocfs2_inode_unlock(dir, 1); 1049 1050 brelse(fe_bh); 1051 brelse(parent_node_bh); 1052 1053 ocfs2_free_dir_lookup_result(&orphan_insert); 1054 ocfs2_free_dir_lookup_result(&lookup); 1055 1056 if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) 1057 mlog_errno(status); 1058 1059 return status; 1060 } 1061 1062 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, 1063 u64 src_inode_no, u64 dest_inode_no) 1064 { 1065 int ret = 0, i = 0; 1066 u64 parent_inode_no = 0; 1067 u64 child_inode_no = src_inode_no; 1068 struct inode *child_inode; 1069 1070 #define MAX_LOOKUP_TIMES 32 1071 while (1) { 1072 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); 1073 if (IS_ERR(child_inode)) { 1074 ret = PTR_ERR(child_inode); 1075 break; 1076 } 1077 1078 ret = ocfs2_inode_lock(child_inode, NULL, 0); 1079 if (ret < 0) { 1080 iput(child_inode); 1081 if (ret != -ENOENT) 1082 mlog_errno(ret); 1083 break; 1084 } 1085 1086 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, 1087 &parent_inode_no); 1088 ocfs2_inode_unlock(child_inode, 0); 1089 iput(child_inode); 1090 if (ret < 0) { 1091 ret = -ENOENT; 1092 break; 1093 } 1094 1095 if (parent_inode_no == dest_inode_no) { 1096 ret = 1; 1097 break; 1098 } 1099 1100 if (parent_inode_no == osb->root_inode->i_ino) { 1101 ret = 0; 1102 break; 1103 } 1104 1105 child_inode_no = parent_inode_no; 1106 1107 if (++i >= MAX_LOOKUP_TIMES) { 1108 mlog(ML_NOTICE, "max lookup times reached, filesystem " 1109 "may have nested directories, " 1110 "src inode: %llu, dest inode: %llu.\n", 1111 (unsigned long long)src_inode_no, 1112 (unsigned long long)dest_inode_no); 1113 ret = 0; 1114 break; 1115 } 1116 } 1117 1118 return ret; 1119 } 1120 1121 /* 1122 * The only place this should be used is rename and link! 1123 * if they have the same id, then the 1st one is the only one locked. 1124 */ 1125 static int ocfs2_double_lock(struct ocfs2_super *osb, 1126 struct buffer_head **bh1, 1127 struct inode *inode1, 1128 struct buffer_head **bh2, 1129 struct inode *inode2, 1130 int rename) 1131 { 1132 int status; 1133 int inode1_is_ancestor, inode2_is_ancestor; 1134 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 1135 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 1136 1137 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 1138 (unsigned long long)oi2->ip_blkno); 1139 1140 if (*bh1) 1141 *bh1 = NULL; 1142 if (*bh2) 1143 *bh2 = NULL; 1144 1145 /* we always want to lock the one with the lower lockid first. 1146 * and if they are nested, we lock ancestor first */ 1147 if (oi1->ip_blkno != oi2->ip_blkno) { 1148 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, 1149 oi1->ip_blkno); 1150 if (inode1_is_ancestor < 0) { 1151 status = inode1_is_ancestor; 1152 goto bail; 1153 } 1154 1155 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, 1156 oi2->ip_blkno); 1157 if (inode2_is_ancestor < 0) { 1158 status = inode2_is_ancestor; 1159 goto bail; 1160 } 1161 1162 if ((inode1_is_ancestor == 1) || 1163 (oi1->ip_blkno < oi2->ip_blkno && 1164 inode2_is_ancestor == 0)) { 1165 /* switch id1 and id2 around */ 1166 swap(bh2, bh1); 1167 swap(inode2, inode1); 1168 } 1169 /* lock id2 */ 1170 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 1171 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); 1172 if (status < 0) { 1173 if (status != -ENOENT) 1174 mlog_errno(status); 1175 goto bail; 1176 } 1177 } 1178 1179 /* lock id1 */ 1180 status = ocfs2_inode_lock_nested(inode1, bh1, 1, 1181 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 1182 if (status < 0) { 1183 /* 1184 * An error return must mean that no cluster locks 1185 * were held on function exit. 1186 */ 1187 if (oi1->ip_blkno != oi2->ip_blkno) { 1188 ocfs2_inode_unlock(inode2, 1); 1189 brelse(*bh2); 1190 *bh2 = NULL; 1191 } 1192 1193 if (status != -ENOENT) 1194 mlog_errno(status); 1195 } 1196 1197 trace_ocfs2_double_lock_end( 1198 (unsigned long long)OCFS2_I(inode1)->ip_blkno, 1199 (unsigned long long)OCFS2_I(inode2)->ip_blkno); 1200 1201 bail: 1202 if (status) 1203 mlog_errno(status); 1204 return status; 1205 } 1206 1207 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1208 { 1209 ocfs2_inode_unlock(inode1, 1); 1210 1211 if (inode1 != inode2) 1212 ocfs2_inode_unlock(inode2, 1); 1213 } 1214 1215 static int ocfs2_rename(struct inode *old_dir, 1216 struct dentry *old_dentry, 1217 struct inode *new_dir, 1218 struct dentry *new_dentry) 1219 { 1220 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1221 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1222 struct inode *old_inode = d_inode(old_dentry); 1223 struct inode *new_inode = d_inode(new_dentry); 1224 struct inode *orphan_dir = NULL; 1225 struct ocfs2_dinode *newfe = NULL; 1226 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1227 struct buffer_head *newfe_bh = NULL; 1228 struct buffer_head *old_inode_bh = NULL; 1229 struct ocfs2_super *osb = NULL; 1230 u64 newfe_blkno, old_de_ino; 1231 handle_t *handle = NULL; 1232 struct buffer_head *old_dir_bh = NULL; 1233 struct buffer_head *new_dir_bh = NULL; 1234 u32 old_dir_nlink = old_dir->i_nlink; 1235 struct ocfs2_dinode *old_di; 1236 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1237 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1238 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1239 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1240 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1241 bool should_add_orphan = false; 1242 1243 /* At some point it might be nice to break this function up a 1244 * bit. */ 1245 1246 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, 1247 old_dentry->d_name.len, old_dentry->d_name.name, 1248 new_dentry->d_name.len, new_dentry->d_name.name); 1249 1250 status = dquot_initialize(old_dir); 1251 if (status) { 1252 mlog_errno(status); 1253 goto bail; 1254 } 1255 status = dquot_initialize(new_dir); 1256 if (status) { 1257 mlog_errno(status); 1258 goto bail; 1259 } 1260 1261 osb = OCFS2_SB(old_dir->i_sb); 1262 1263 if (new_inode) { 1264 if (!igrab(new_inode)) 1265 BUG(); 1266 } 1267 1268 /* Assume a directory hierarchy thusly: 1269 * a/b/c 1270 * a/d 1271 * a,b,c, and d are all directories. 1272 * 1273 * from cwd of 'a' on both nodes: 1274 * node1: mv b/c d 1275 * node2: mv d b/c 1276 * 1277 * And that's why, just like the VFS, we need a file system 1278 * rename lock. */ 1279 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1280 status = ocfs2_rename_lock(osb); 1281 if (status < 0) { 1282 mlog_errno(status); 1283 goto bail; 1284 } 1285 rename_lock = 1; 1286 1287 /* here we cannot guarantee the inodes haven't just been 1288 * changed, so check if they are nested again */ 1289 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, 1290 old_inode->i_ino); 1291 if (status < 0) { 1292 mlog_errno(status); 1293 goto bail; 1294 } else if (status == 1) { 1295 status = -EPERM; 1296 trace_ocfs2_rename_not_permitted( 1297 (unsigned long long)old_inode->i_ino, 1298 (unsigned long long)new_dir->i_ino); 1299 goto bail; 1300 } 1301 } 1302 1303 /* if old and new are the same, this'll just do one lock. */ 1304 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1305 &new_dir_bh, new_dir, 1); 1306 if (status < 0) { 1307 mlog_errno(status); 1308 goto bail; 1309 } 1310 parents_locked = 1; 1311 1312 if (!new_dir->i_nlink) { 1313 status = -EACCES; 1314 goto bail; 1315 } 1316 1317 /* make sure both dirs have bhs 1318 * get an extra ref on old_dir_bh if old==new */ 1319 if (!new_dir_bh) { 1320 if (old_dir_bh) { 1321 new_dir_bh = old_dir_bh; 1322 get_bh(new_dir_bh); 1323 } else { 1324 mlog(ML_ERROR, "no old_dir_bh!\n"); 1325 status = -EIO; 1326 goto bail; 1327 } 1328 } 1329 1330 /* 1331 * Aside from allowing a meta data update, the locking here 1332 * also ensures that the downconvert thread on other nodes 1333 * won't have to concurrently downconvert the inode and the 1334 * dentry locks. 1335 */ 1336 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1337 OI_LS_PARENT); 1338 if (status < 0) { 1339 if (status != -ENOENT) 1340 mlog_errno(status); 1341 goto bail; 1342 } 1343 old_child_locked = 1; 1344 1345 status = ocfs2_remote_dentry_delete(old_dentry); 1346 if (status < 0) { 1347 mlog_errno(status); 1348 goto bail; 1349 } 1350 1351 if (S_ISDIR(old_inode->i_mode)) { 1352 u64 old_inode_parent; 1353 1354 update_dot_dot = 1; 1355 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1356 old_inode, 1357 &old_inode_dot_dot_res); 1358 if (status) { 1359 status = -EIO; 1360 goto bail; 1361 } 1362 1363 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1364 status = -EIO; 1365 goto bail; 1366 } 1367 1368 if (!new_inode && new_dir != old_dir && 1369 new_dir->i_nlink >= ocfs2_link_max(osb)) { 1370 status = -EMLINK; 1371 goto bail; 1372 } 1373 } 1374 1375 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1376 old_dentry->d_name.len, 1377 &old_de_ino); 1378 if (status) { 1379 status = -ENOENT; 1380 goto bail; 1381 } 1382 1383 /* 1384 * Check for inode number is _not_ due to possible IO errors. 1385 * We might rmdir the source, keep it as pwd of some process 1386 * and merrily kill the link to whatever was created under the 1387 * same name. Goodbye sticky bit ;-< 1388 */ 1389 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1390 status = -ENOENT; 1391 goto bail; 1392 } 1393 1394 /* check if the target already exists (in which case we need 1395 * to delete it */ 1396 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1397 new_dentry->d_name.len, 1398 &newfe_blkno, new_dir, 1399 &target_lookup_res); 1400 /* The only error we allow here is -ENOENT because the new 1401 * file not existing is perfectly valid. */ 1402 if ((status < 0) && (status != -ENOENT)) { 1403 /* If we cannot find the file specified we should just */ 1404 /* return the error... */ 1405 mlog_errno(status); 1406 goto bail; 1407 } 1408 if (status == 0) 1409 target_exists = 1; 1410 1411 if (!target_exists && new_inode) { 1412 /* 1413 * Target was unlinked by another node while we were 1414 * waiting to get to ocfs2_rename(). There isn't 1415 * anything we can do here to help the situation, so 1416 * bubble up the appropriate error. 1417 */ 1418 status = -ENOENT; 1419 goto bail; 1420 } 1421 1422 /* In case we need to overwrite an existing file, we blow it 1423 * away first */ 1424 if (target_exists) { 1425 /* VFS didn't think there existed an inode here, but 1426 * someone else in the cluster must have raced our 1427 * rename to create one. Today we error cleanly, in 1428 * the future we should consider calling iget to build 1429 * a new struct inode for this entry. */ 1430 if (!new_inode) { 1431 status = -EACCES; 1432 1433 trace_ocfs2_rename_target_exists(new_dentry->d_name.len, 1434 new_dentry->d_name.name); 1435 goto bail; 1436 } 1437 1438 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1439 status = -EACCES; 1440 1441 trace_ocfs2_rename_disagree( 1442 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1443 (unsigned long long)newfe_blkno, 1444 OCFS2_I(new_inode)->ip_flags); 1445 goto bail; 1446 } 1447 1448 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1449 if (status < 0) { 1450 if (status != -ENOENT) 1451 mlog_errno(status); 1452 goto bail; 1453 } 1454 new_child_locked = 1; 1455 1456 status = ocfs2_remote_dentry_delete(new_dentry); 1457 if (status < 0) { 1458 mlog_errno(status); 1459 goto bail; 1460 } 1461 1462 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1463 1464 trace_ocfs2_rename_over_existing( 1465 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1466 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1467 1468 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1469 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1470 OCFS2_I(new_inode)->ip_blkno, 1471 orphan_name, &orphan_insert, 1472 false); 1473 if (status < 0) { 1474 mlog_errno(status); 1475 goto bail; 1476 } 1477 should_add_orphan = true; 1478 } 1479 } else { 1480 BUG_ON(d_inode(new_dentry->d_parent) != new_dir); 1481 1482 status = ocfs2_check_dir_for_entry(new_dir, 1483 new_dentry->d_name.name, 1484 new_dentry->d_name.len); 1485 if (status) 1486 goto bail; 1487 1488 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1489 new_dentry->d_name.name, 1490 new_dentry->d_name.len, 1491 &target_insert); 1492 if (status < 0) { 1493 mlog_errno(status); 1494 goto bail; 1495 } 1496 } 1497 1498 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1499 if (IS_ERR(handle)) { 1500 status = PTR_ERR(handle); 1501 handle = NULL; 1502 mlog_errno(status); 1503 goto bail; 1504 } 1505 1506 if (target_exists) { 1507 if (S_ISDIR(new_inode->i_mode)) { 1508 if (new_inode->i_nlink != 2 || 1509 !ocfs2_empty_dir(new_inode)) { 1510 status = -ENOTEMPTY; 1511 goto bail; 1512 } 1513 } 1514 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1515 newfe_bh, 1516 OCFS2_JOURNAL_ACCESS_WRITE); 1517 if (status < 0) { 1518 mlog_errno(status); 1519 goto bail; 1520 } 1521 1522 /* change the dirent to point to the correct inode */ 1523 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1524 old_inode); 1525 if (status < 0) { 1526 mlog_errno(status); 1527 goto bail; 1528 } 1529 new_dir->i_version++; 1530 1531 if (S_ISDIR(new_inode->i_mode)) 1532 ocfs2_set_links_count(newfe, 0); 1533 else 1534 ocfs2_add_links_count(newfe, -1); 1535 ocfs2_journal_dirty(handle, newfe_bh); 1536 if (should_add_orphan) { 1537 status = ocfs2_orphan_add(osb, handle, new_inode, 1538 newfe_bh, orphan_name, 1539 &orphan_insert, orphan_dir, false); 1540 if (status < 0) { 1541 mlog_errno(status); 1542 goto bail; 1543 } 1544 } 1545 } else { 1546 /* if the name was not found in new_dir, add it now */ 1547 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1548 OCFS2_I(old_inode)->ip_blkno, 1549 new_dir_bh, &target_insert); 1550 } 1551 1552 old_inode->i_ctime = CURRENT_TIME; 1553 mark_inode_dirty(old_inode); 1554 1555 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1556 old_inode_bh, 1557 OCFS2_JOURNAL_ACCESS_WRITE); 1558 if (status >= 0) { 1559 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1560 1561 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); 1562 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); 1563 ocfs2_journal_dirty(handle, old_inode_bh); 1564 } else 1565 mlog_errno(status); 1566 1567 /* 1568 * Now that the name has been added to new_dir, remove the old name. 1569 * 1570 * We don't keep any directory entry context around until now 1571 * because the insert might have changed the type of directory 1572 * we're dealing with. 1573 */ 1574 status = ocfs2_find_entry(old_dentry->d_name.name, 1575 old_dentry->d_name.len, old_dir, 1576 &old_entry_lookup); 1577 if (status) { 1578 if (!is_journal_aborted(osb->journal->j_journal)) { 1579 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1580 "is not deleted.", 1581 new_dentry->d_name.len, new_dentry->d_name.name, 1582 old_dentry->d_name.len, old_dentry->d_name.name); 1583 } 1584 goto bail; 1585 } 1586 1587 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1588 if (status < 0) { 1589 mlog_errno(status); 1590 if (!is_journal_aborted(osb->journal->j_journal)) { 1591 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1592 "is not deleted.", 1593 new_dentry->d_name.len, new_dentry->d_name.name, 1594 old_dentry->d_name.len, old_dentry->d_name.name); 1595 } 1596 goto bail; 1597 } 1598 1599 if (new_inode) { 1600 drop_nlink(new_inode); 1601 new_inode->i_ctime = CURRENT_TIME; 1602 } 1603 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; 1604 1605 if (update_dot_dot) { 1606 status = ocfs2_update_entry(old_inode, handle, 1607 &old_inode_dot_dot_res, new_dir); 1608 drop_nlink(old_dir); 1609 if (new_inode) { 1610 drop_nlink(new_inode); 1611 } else { 1612 inc_nlink(new_dir); 1613 mark_inode_dirty(new_dir); 1614 } 1615 } 1616 mark_inode_dirty(old_dir); 1617 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1618 if (new_inode) { 1619 mark_inode_dirty(new_inode); 1620 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1621 } 1622 1623 if (old_dir != new_dir) { 1624 /* Keep the same times on both directories.*/ 1625 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; 1626 1627 /* 1628 * This will also pick up the i_nlink change from the 1629 * block above. 1630 */ 1631 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1632 } 1633 1634 if (old_dir_nlink != old_dir->i_nlink) { 1635 if (!old_dir_bh) { 1636 mlog(ML_ERROR, "need to change nlink for old dir " 1637 "%llu from %d to %d but bh is NULL!\n", 1638 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1639 (int)old_dir_nlink, old_dir->i_nlink); 1640 } else { 1641 struct ocfs2_dinode *fe; 1642 status = ocfs2_journal_access_di(handle, 1643 INODE_CACHE(old_dir), 1644 old_dir_bh, 1645 OCFS2_JOURNAL_ACCESS_WRITE); 1646 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1647 ocfs2_set_links_count(fe, old_dir->i_nlink); 1648 ocfs2_journal_dirty(handle, old_dir_bh); 1649 } 1650 } 1651 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1652 status = 0; 1653 bail: 1654 if (handle) 1655 ocfs2_commit_trans(osb, handle); 1656 1657 if (orphan_dir) { 1658 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1659 ocfs2_inode_unlock(orphan_dir, 1); 1660 mutex_unlock(&orphan_dir->i_mutex); 1661 iput(orphan_dir); 1662 } 1663 1664 if (new_child_locked) 1665 ocfs2_inode_unlock(new_inode, 1); 1666 1667 if (old_child_locked) 1668 ocfs2_inode_unlock(old_inode, 1); 1669 1670 if (parents_locked) 1671 ocfs2_double_unlock(old_dir, new_dir); 1672 1673 if (rename_lock) 1674 ocfs2_rename_unlock(osb); 1675 1676 if (new_inode) 1677 sync_mapping_buffers(old_inode->i_mapping); 1678 1679 if (new_inode) 1680 iput(new_inode); 1681 1682 ocfs2_free_dir_lookup_result(&target_lookup_res); 1683 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1684 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1685 ocfs2_free_dir_lookup_result(&orphan_insert); 1686 ocfs2_free_dir_lookup_result(&target_insert); 1687 1688 brelse(newfe_bh); 1689 brelse(old_inode_bh); 1690 brelse(old_dir_bh); 1691 brelse(new_dir_bh); 1692 1693 if (status) 1694 mlog_errno(status); 1695 1696 return status; 1697 } 1698 1699 /* 1700 * we expect i_size = strlen(symname). Copy symname into the file 1701 * data, including the null terminator. 1702 */ 1703 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1704 handle_t *handle, 1705 struct inode *inode, 1706 const char *symname) 1707 { 1708 struct buffer_head **bhs = NULL; 1709 const char *c; 1710 struct super_block *sb = osb->sb; 1711 u64 p_blkno, p_blocks; 1712 int virtual, blocks, status, i, bytes_left; 1713 1714 bytes_left = i_size_read(inode) + 1; 1715 /* we can't trust i_blocks because we're actually going to 1716 * write i_size + 1 bytes. */ 1717 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1718 1719 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, 1720 i_size_read(inode), blocks); 1721 1722 /* Sanity check -- make sure we're going to fit. */ 1723 if (bytes_left > 1724 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1725 status = -EIO; 1726 mlog_errno(status); 1727 goto bail; 1728 } 1729 1730 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1731 if (!bhs) { 1732 status = -ENOMEM; 1733 mlog_errno(status); 1734 goto bail; 1735 } 1736 1737 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1738 NULL); 1739 if (status < 0) { 1740 mlog_errno(status); 1741 goto bail; 1742 } 1743 1744 /* links can never be larger than one cluster so we know this 1745 * is all going to be contiguous, but do a sanity check 1746 * anyway. */ 1747 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1748 status = -EIO; 1749 mlog_errno(status); 1750 goto bail; 1751 } 1752 1753 virtual = 0; 1754 while(bytes_left > 0) { 1755 c = &symname[virtual * sb->s_blocksize]; 1756 1757 bhs[virtual] = sb_getblk(sb, p_blkno); 1758 if (!bhs[virtual]) { 1759 status = -ENOMEM; 1760 mlog_errno(status); 1761 goto bail; 1762 } 1763 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1764 bhs[virtual]); 1765 1766 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1767 bhs[virtual], 1768 OCFS2_JOURNAL_ACCESS_CREATE); 1769 if (status < 0) { 1770 mlog_errno(status); 1771 goto bail; 1772 } 1773 1774 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1775 1776 memcpy(bhs[virtual]->b_data, c, 1777 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1778 bytes_left); 1779 1780 ocfs2_journal_dirty(handle, bhs[virtual]); 1781 1782 virtual++; 1783 p_blkno++; 1784 bytes_left -= sb->s_blocksize; 1785 } 1786 1787 status = 0; 1788 bail: 1789 1790 if (bhs) { 1791 for(i = 0; i < blocks; i++) 1792 brelse(bhs[i]); 1793 kfree(bhs); 1794 } 1795 1796 if (status) 1797 mlog_errno(status); 1798 return status; 1799 } 1800 1801 static int ocfs2_symlink(struct inode *dir, 1802 struct dentry *dentry, 1803 const char *symname) 1804 { 1805 int status, l, credits; 1806 u64 newsize; 1807 struct ocfs2_super *osb = NULL; 1808 struct inode *inode = NULL; 1809 struct super_block *sb; 1810 struct buffer_head *new_fe_bh = NULL; 1811 struct buffer_head *parent_fe_bh = NULL; 1812 struct ocfs2_dinode *fe = NULL; 1813 struct ocfs2_dinode *dirfe; 1814 handle_t *handle = NULL; 1815 struct ocfs2_alloc_context *inode_ac = NULL; 1816 struct ocfs2_alloc_context *data_ac = NULL; 1817 struct ocfs2_alloc_context *xattr_ac = NULL; 1818 int want_clusters = 0; 1819 int xattr_credits = 0; 1820 struct ocfs2_security_xattr_info si = { 1821 .enable = 1, 1822 }; 1823 int did_quota = 0, did_quota_inode = 0; 1824 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1825 sigset_t oldset; 1826 int did_block_signals = 0; 1827 struct ocfs2_dentry_lock *dl = NULL; 1828 1829 trace_ocfs2_symlink_begin(dir, dentry, symname, 1830 dentry->d_name.len, dentry->d_name.name); 1831 1832 status = dquot_initialize(dir); 1833 if (status) { 1834 mlog_errno(status); 1835 goto bail; 1836 } 1837 1838 sb = dir->i_sb; 1839 osb = OCFS2_SB(sb); 1840 1841 l = strlen(symname) + 1; 1842 1843 credits = ocfs2_calc_symlink_credits(sb); 1844 1845 /* lock the parent directory */ 1846 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1847 if (status < 0) { 1848 if (status != -ENOENT) 1849 mlog_errno(status); 1850 return status; 1851 } 1852 1853 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1854 if (!ocfs2_read_links_count(dirfe)) { 1855 /* can't make a file in a deleted directory. */ 1856 status = -ENOENT; 1857 goto bail; 1858 } 1859 1860 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1861 dentry->d_name.len); 1862 if (status) 1863 goto bail; 1864 1865 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1866 dentry->d_name.name, 1867 dentry->d_name.len, &lookup); 1868 if (status < 0) { 1869 mlog_errno(status); 1870 goto bail; 1871 } 1872 1873 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1874 if (status < 0) { 1875 if (status != -ENOSPC) 1876 mlog_errno(status); 1877 goto bail; 1878 } 1879 1880 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1881 if (IS_ERR(inode)) { 1882 status = PTR_ERR(inode); 1883 inode = NULL; 1884 mlog_errno(status); 1885 goto bail; 1886 } 1887 1888 /* get security xattr */ 1889 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1890 if (status) { 1891 if (status == -EOPNOTSUPP) 1892 si.enable = 0; 1893 else { 1894 mlog_errno(status); 1895 goto bail; 1896 } 1897 } 1898 1899 /* calculate meta data/clusters for setting security xattr */ 1900 if (si.enable) { 1901 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1902 &xattr_credits, &xattr_ac); 1903 if (status < 0) { 1904 mlog_errno(status); 1905 goto bail; 1906 } 1907 } 1908 1909 /* don't reserve bitmap space for fast symlinks. */ 1910 if (l > ocfs2_fast_symlink_chars(sb)) 1911 want_clusters += 1; 1912 1913 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1914 if (status < 0) { 1915 if (status != -ENOSPC) 1916 mlog_errno(status); 1917 goto bail; 1918 } 1919 1920 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1921 if (IS_ERR(handle)) { 1922 status = PTR_ERR(handle); 1923 handle = NULL; 1924 mlog_errno(status); 1925 goto bail; 1926 } 1927 1928 /* Starting to change things, restart is no longer possible. */ 1929 ocfs2_block_signals(&oldset); 1930 did_block_signals = 1; 1931 1932 status = dquot_alloc_inode(inode); 1933 if (status) 1934 goto bail; 1935 did_quota_inode = 1; 1936 1937 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1938 dentry->d_name.name, 1939 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1940 inode->i_mode); 1941 1942 status = ocfs2_mknod_locked(osb, dir, inode, 1943 0, &new_fe_bh, parent_fe_bh, handle, 1944 inode_ac); 1945 if (status < 0) { 1946 mlog_errno(status); 1947 goto bail; 1948 } 1949 1950 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1951 inode->i_rdev = 0; 1952 newsize = l - 1; 1953 inode->i_op = &ocfs2_symlink_inode_operations; 1954 if (l > ocfs2_fast_symlink_chars(sb)) { 1955 u32 offset = 0; 1956 1957 status = dquot_alloc_space_nodirty(inode, 1958 ocfs2_clusters_to_bytes(osb->sb, 1)); 1959 if (status) 1960 goto bail; 1961 did_quota = 1; 1962 inode->i_mapping->a_ops = &ocfs2_aops; 1963 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1964 new_fe_bh, 1965 handle, data_ac, NULL, 1966 NULL); 1967 if (status < 0) { 1968 if (status != -ENOSPC && status != -EINTR) { 1969 mlog(ML_ERROR, 1970 "Failed to extend file to %llu\n", 1971 (unsigned long long)newsize); 1972 mlog_errno(status); 1973 status = -ENOSPC; 1974 } 1975 goto bail; 1976 } 1977 i_size_write(inode, newsize); 1978 inode->i_blocks = ocfs2_inode_sector_count(inode); 1979 } else { 1980 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1981 memcpy((char *) fe->id2.i_symlink, symname, l); 1982 i_size_write(inode, newsize); 1983 inode->i_blocks = 0; 1984 } 1985 1986 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1987 if (status < 0) { 1988 mlog_errno(status); 1989 goto bail; 1990 } 1991 1992 if (!ocfs2_inode_is_fast_symlink(inode)) { 1993 status = ocfs2_create_symlink_data(osb, handle, inode, 1994 symname); 1995 if (status < 0) { 1996 mlog_errno(status); 1997 goto bail; 1998 } 1999 } 2000 2001 if (si.enable) { 2002 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 2003 xattr_ac, data_ac); 2004 if (status < 0) { 2005 mlog_errno(status); 2006 goto bail; 2007 } 2008 } 2009 2010 /* 2011 * Do this before adding the entry to the directory. We add 2012 * also set d_op after success so that ->d_iput() will cleanup 2013 * the dentry lock even if ocfs2_add_entry() fails below. 2014 */ 2015 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 2016 if (status) { 2017 mlog_errno(status); 2018 goto bail; 2019 } 2020 2021 dl = dentry->d_fsdata; 2022 2023 status = ocfs2_add_entry(handle, dentry, inode, 2024 le64_to_cpu(fe->i_blkno), parent_fe_bh, 2025 &lookup); 2026 if (status < 0) { 2027 mlog_errno(status); 2028 goto bail; 2029 } 2030 2031 insert_inode_hash(inode); 2032 d_instantiate(dentry, inode); 2033 bail: 2034 if (status < 0 && did_quota) 2035 dquot_free_space_nodirty(inode, 2036 ocfs2_clusters_to_bytes(osb->sb, 1)); 2037 if (status < 0 && did_quota_inode) 2038 dquot_free_inode(inode); 2039 if (handle) 2040 ocfs2_commit_trans(osb, handle); 2041 2042 ocfs2_inode_unlock(dir, 1); 2043 if (did_block_signals) 2044 ocfs2_unblock_signals(&oldset); 2045 2046 brelse(new_fe_bh); 2047 brelse(parent_fe_bh); 2048 kfree(si.value); 2049 ocfs2_free_dir_lookup_result(&lookup); 2050 if (inode_ac) 2051 ocfs2_free_alloc_context(inode_ac); 2052 if (data_ac) 2053 ocfs2_free_alloc_context(data_ac); 2054 if (xattr_ac) 2055 ocfs2_free_alloc_context(xattr_ac); 2056 if ((status < 0) && inode) { 2057 if (dl) 2058 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 2059 2060 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 2061 clear_nlink(inode); 2062 iput(inode); 2063 } 2064 2065 if (status) 2066 mlog_errno(status); 2067 2068 return status; 2069 } 2070 2071 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2072 { 2073 int status, namelen; 2074 2075 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2076 (long long)blkno); 2077 if (namelen <= 0) { 2078 if (namelen) 2079 status = namelen; 2080 else 2081 status = -EINVAL; 2082 mlog_errno(status); 2083 goto bail; 2084 } 2085 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2086 status = -EINVAL; 2087 mlog_errno(status); 2088 goto bail; 2089 } 2090 2091 trace_ocfs2_blkno_stringify(blkno, name, namelen); 2092 2093 status = 0; 2094 bail: 2095 if (status < 0) 2096 mlog_errno(status); 2097 return status; 2098 } 2099 2100 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, 2101 struct inode **ret_orphan_dir, 2102 struct buffer_head **ret_orphan_dir_bh) 2103 { 2104 struct inode *orphan_dir_inode; 2105 struct buffer_head *orphan_dir_bh = NULL; 2106 int ret = 0; 2107 2108 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2109 ORPHAN_DIR_SYSTEM_INODE, 2110 osb->slot_num); 2111 if (!orphan_dir_inode) { 2112 ret = -ENOENT; 2113 mlog_errno(ret); 2114 return ret; 2115 } 2116 2117 mutex_lock(&orphan_dir_inode->i_mutex); 2118 2119 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2120 if (ret < 0) { 2121 mutex_unlock(&orphan_dir_inode->i_mutex); 2122 iput(orphan_dir_inode); 2123 2124 mlog_errno(ret); 2125 return ret; 2126 } 2127 2128 *ret_orphan_dir = orphan_dir_inode; 2129 *ret_orphan_dir_bh = orphan_dir_bh; 2130 2131 return 0; 2132 } 2133 2134 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, 2135 struct buffer_head *orphan_dir_bh, 2136 u64 blkno, 2137 char *name, 2138 struct ocfs2_dir_lookup_result *lookup, 2139 bool dio) 2140 { 2141 int ret; 2142 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); 2143 int namelen = dio ? 2144 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2145 OCFS2_ORPHAN_NAMELEN; 2146 2147 if (dio) { 2148 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2149 OCFS2_DIO_ORPHAN_PREFIX); 2150 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2151 ret = -EINVAL; 2152 mlog_errno(ret); 2153 return ret; 2154 } 2155 2156 ret = ocfs2_blkno_stringify(blkno, 2157 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2158 } else 2159 ret = ocfs2_blkno_stringify(blkno, name); 2160 if (ret < 0) { 2161 mlog_errno(ret); 2162 return ret; 2163 } 2164 2165 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2166 orphan_dir_bh, name, 2167 namelen, lookup); 2168 if (ret < 0) { 2169 mlog_errno(ret); 2170 return ret; 2171 } 2172 2173 return 0; 2174 } 2175 2176 /** 2177 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for 2178 * insertion of an orphan. 2179 * @osb: ocfs2 file system 2180 * @ret_orphan_dir: Orphan dir inode - returned locked! 2181 * @blkno: Actual block number of the inode to be inserted into orphan dir. 2182 * @lookup: dir lookup result, to be passed back into functions like 2183 * ocfs2_orphan_add 2184 * 2185 * Returns zero on success and the ret_orphan_dir, name and lookup 2186 * fields will be populated. 2187 * 2188 * Returns non-zero on failure. 2189 */ 2190 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2191 struct inode **ret_orphan_dir, 2192 u64 blkno, 2193 char *name, 2194 struct ocfs2_dir_lookup_result *lookup, 2195 bool dio) 2196 { 2197 struct inode *orphan_dir_inode = NULL; 2198 struct buffer_head *orphan_dir_bh = NULL; 2199 int ret = 0; 2200 2201 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, 2202 &orphan_dir_bh); 2203 if (ret < 0) { 2204 mlog_errno(ret); 2205 return ret; 2206 } 2207 2208 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, 2209 blkno, name, lookup, dio); 2210 if (ret < 0) { 2211 mlog_errno(ret); 2212 goto out; 2213 } 2214 2215 *ret_orphan_dir = orphan_dir_inode; 2216 2217 out: 2218 brelse(orphan_dir_bh); 2219 2220 if (ret) { 2221 ocfs2_inode_unlock(orphan_dir_inode, 1); 2222 mutex_unlock(&orphan_dir_inode->i_mutex); 2223 iput(orphan_dir_inode); 2224 } 2225 2226 if (ret) 2227 mlog_errno(ret); 2228 return ret; 2229 } 2230 2231 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2232 handle_t *handle, 2233 struct inode *inode, 2234 struct buffer_head *fe_bh, 2235 char *name, 2236 struct ocfs2_dir_lookup_result *lookup, 2237 struct inode *orphan_dir_inode, 2238 bool dio) 2239 { 2240 struct buffer_head *orphan_dir_bh = NULL; 2241 int status = 0; 2242 struct ocfs2_dinode *orphan_fe; 2243 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 2244 int namelen = dio ? 2245 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2246 OCFS2_ORPHAN_NAMELEN; 2247 2248 trace_ocfs2_orphan_add_begin( 2249 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2250 2251 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 2252 if (status < 0) { 2253 mlog_errno(status); 2254 goto leave; 2255 } 2256 2257 status = ocfs2_journal_access_di(handle, 2258 INODE_CACHE(orphan_dir_inode), 2259 orphan_dir_bh, 2260 OCFS2_JOURNAL_ACCESS_WRITE); 2261 if (status < 0) { 2262 mlog_errno(status); 2263 goto leave; 2264 } 2265 2266 /* 2267 * We're going to journal the change of i_flags and i_orphaned_slot. 2268 * It's safe anyway, though some callers may duplicate the journaling. 2269 * Journaling within the func just make the logic look more 2270 * straightforward. 2271 */ 2272 status = ocfs2_journal_access_di(handle, 2273 INODE_CACHE(inode), 2274 fe_bh, 2275 OCFS2_JOURNAL_ACCESS_WRITE); 2276 if (status < 0) { 2277 mlog_errno(status); 2278 goto leave; 2279 } 2280 2281 /* we're a cluster, and nlink can change on disk from 2282 * underneath us... */ 2283 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2284 if (S_ISDIR(inode->i_mode)) 2285 ocfs2_add_links_count(orphan_fe, 1); 2286 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2287 ocfs2_journal_dirty(handle, orphan_dir_bh); 2288 2289 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2290 namelen, inode, 2291 OCFS2_I(inode)->ip_blkno, 2292 orphan_dir_bh, lookup); 2293 if (status < 0) { 2294 mlog_errno(status); 2295 goto rollback; 2296 } 2297 2298 if (dio) { 2299 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan 2300 * slot. 2301 */ 2302 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2303 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); 2304 } else { 2305 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL); 2306 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; 2307 2308 /* Record which orphan dir our inode now resides 2309 * in. delete_inode will use this to determine which orphan 2310 * dir to lock. */ 2311 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2312 } 2313 2314 ocfs2_journal_dirty(handle, fe_bh); 2315 2316 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, 2317 osb->slot_num); 2318 2319 rollback: 2320 if (status < 0) { 2321 if (S_ISDIR(inode->i_mode)) 2322 ocfs2_add_links_count(orphan_fe, -1); 2323 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2324 } 2325 2326 leave: 2327 brelse(orphan_dir_bh); 2328 2329 return status; 2330 } 2331 2332 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2333 int ocfs2_orphan_del(struct ocfs2_super *osb, 2334 handle_t *handle, 2335 struct inode *orphan_dir_inode, 2336 struct inode *inode, 2337 struct buffer_head *orphan_dir_bh, 2338 bool dio) 2339 { 2340 const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN; 2341 char name[namelen + 1]; 2342 struct ocfs2_dinode *orphan_fe; 2343 int status = 0; 2344 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2345 2346 if (dio) { 2347 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2348 OCFS2_DIO_ORPHAN_PREFIX); 2349 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2350 status = -EINVAL; 2351 mlog_errno(status); 2352 return status; 2353 } 2354 2355 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, 2356 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2357 } else 2358 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2359 if (status < 0) { 2360 mlog_errno(status); 2361 goto leave; 2362 } 2363 2364 trace_ocfs2_orphan_del( 2365 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2366 name, strlen(name)); 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 status = ocfs2_journal_access_di(handle, 2384 INODE_CACHE(orphan_dir_inode), 2385 orphan_dir_bh, 2386 OCFS2_JOURNAL_ACCESS_WRITE); 2387 if (status < 0) { 2388 mlog_errno(status); 2389 goto leave; 2390 } 2391 2392 /* do the i_nlink dance! :) */ 2393 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2394 if (S_ISDIR(inode->i_mode)) 2395 ocfs2_add_links_count(orphan_fe, -1); 2396 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2397 ocfs2_journal_dirty(handle, orphan_dir_bh); 2398 2399 leave: 2400 ocfs2_free_dir_lookup_result(&lookup); 2401 2402 if (status) 2403 mlog_errno(status); 2404 return status; 2405 } 2406 2407 /** 2408 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly 2409 * allocated file. This is different from the typical 'add to orphan dir' 2410 * operation in that the inode does not yet exist. This is a problem because 2411 * the orphan dir stringifies the inode block number to come up with it's 2412 * dirent. Obviously if the inode does not yet exist we have a chicken and egg 2413 * problem. This function works around it by calling deeper into the orphan 2414 * and suballoc code than other callers. Use this only by necessity. 2415 * @dir: The directory which this inode will ultimately wind up under - not the 2416 * orphan dir! 2417 * @dir_bh: buffer_head the @dir inode block 2418 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled 2419 * with the string to be used for orphan dirent. Pass back to the orphan dir 2420 * code. 2421 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan 2422 * dir code. 2423 * @ret_di_blkno: block number where the new inode will be allocated. 2424 * @orphan_insert: Dir insert context to be passed back into orphan dir code. 2425 * @ret_inode_ac: Inode alloc context to be passed back to the allocator. 2426 * 2427 * Returns zero on success and the ret_orphan_dir, name and lookup 2428 * fields will be populated. 2429 * 2430 * Returns non-zero on failure. 2431 */ 2432 static int ocfs2_prep_new_orphaned_file(struct inode *dir, 2433 struct buffer_head *dir_bh, 2434 char *orphan_name, 2435 struct inode **ret_orphan_dir, 2436 u64 *ret_di_blkno, 2437 struct ocfs2_dir_lookup_result *orphan_insert, 2438 struct ocfs2_alloc_context **ret_inode_ac) 2439 { 2440 int ret; 2441 u64 di_blkno; 2442 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2443 struct inode *orphan_dir = NULL; 2444 struct buffer_head *orphan_dir_bh = NULL; 2445 struct ocfs2_alloc_context *inode_ac = NULL; 2446 2447 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); 2448 if (ret < 0) { 2449 mlog_errno(ret); 2450 return ret; 2451 } 2452 2453 /* reserve an inode spot */ 2454 ret = ocfs2_reserve_new_inode(osb, &inode_ac); 2455 if (ret < 0) { 2456 if (ret != -ENOSPC) 2457 mlog_errno(ret); 2458 goto out; 2459 } 2460 2461 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, 2462 &di_blkno); 2463 if (ret) { 2464 mlog_errno(ret); 2465 goto out; 2466 } 2467 2468 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, 2469 di_blkno, orphan_name, orphan_insert, 2470 false); 2471 if (ret < 0) { 2472 mlog_errno(ret); 2473 goto out; 2474 } 2475 2476 out: 2477 if (ret == 0) { 2478 *ret_orphan_dir = orphan_dir; 2479 *ret_di_blkno = di_blkno; 2480 *ret_inode_ac = inode_ac; 2481 /* 2482 * orphan_name and orphan_insert are already up to 2483 * date via prepare_orphan_dir 2484 */ 2485 } else { 2486 /* Unroll reserve_new_inode* */ 2487 if (inode_ac) 2488 ocfs2_free_alloc_context(inode_ac); 2489 2490 /* Unroll orphan dir locking */ 2491 mutex_unlock(&orphan_dir->i_mutex); 2492 ocfs2_inode_unlock(orphan_dir, 1); 2493 iput(orphan_dir); 2494 } 2495 2496 brelse(orphan_dir_bh); 2497 2498 return ret; 2499 } 2500 2501 int ocfs2_create_inode_in_orphan(struct inode *dir, 2502 int mode, 2503 struct inode **new_inode) 2504 { 2505 int status, did_quota_inode = 0; 2506 struct inode *inode = NULL; 2507 struct inode *orphan_dir = NULL; 2508 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2509 struct ocfs2_dinode *di = NULL; 2510 handle_t *handle = NULL; 2511 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2512 struct buffer_head *parent_di_bh = NULL; 2513 struct buffer_head *new_di_bh = NULL; 2514 struct ocfs2_alloc_context *inode_ac = NULL; 2515 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2516 u64 uninitialized_var(di_blkno), suballoc_loc; 2517 u16 suballoc_bit; 2518 2519 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2520 if (status < 0) { 2521 if (status != -ENOENT) 2522 mlog_errno(status); 2523 return status; 2524 } 2525 2526 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, 2527 orphan_name, &orphan_dir, 2528 &di_blkno, &orphan_insert, &inode_ac); 2529 if (status < 0) { 2530 if (status != -ENOSPC) 2531 mlog_errno(status); 2532 goto leave; 2533 } 2534 2535 inode = ocfs2_get_init_inode(dir, mode); 2536 if (IS_ERR(inode)) { 2537 status = PTR_ERR(inode); 2538 inode = NULL; 2539 mlog_errno(status); 2540 goto leave; 2541 } 2542 2543 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2544 if (IS_ERR(handle)) { 2545 status = PTR_ERR(handle); 2546 handle = NULL; 2547 mlog_errno(status); 2548 goto leave; 2549 } 2550 2551 status = dquot_alloc_inode(inode); 2552 if (status) 2553 goto leave; 2554 did_quota_inode = 1; 2555 2556 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, 2557 &suballoc_loc, 2558 &suballoc_bit, di_blkno); 2559 if (status < 0) { 2560 mlog_errno(status); 2561 goto leave; 2562 } 2563 2564 clear_nlink(inode); 2565 /* do the real work now. */ 2566 status = __ocfs2_mknod_locked(dir, inode, 2567 0, &new_di_bh, parent_di_bh, handle, 2568 inode_ac, di_blkno, suballoc_loc, 2569 suballoc_bit); 2570 if (status < 0) { 2571 mlog_errno(status); 2572 goto leave; 2573 } 2574 2575 di = (struct ocfs2_dinode *)new_di_bh->b_data; 2576 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, 2577 &orphan_insert, orphan_dir, false); 2578 if (status < 0) { 2579 mlog_errno(status); 2580 goto leave; 2581 } 2582 2583 /* get open lock so that only nodes can't remove it from orphan dir. */ 2584 status = ocfs2_open_lock(inode); 2585 if (status < 0) 2586 mlog_errno(status); 2587 2588 insert_inode_hash(inode); 2589 leave: 2590 if (status < 0 && did_quota_inode) 2591 dquot_free_inode(inode); 2592 if (handle) 2593 ocfs2_commit_trans(osb, handle); 2594 2595 if (orphan_dir) { 2596 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2597 ocfs2_inode_unlock(orphan_dir, 1); 2598 mutex_unlock(&orphan_dir->i_mutex); 2599 iput(orphan_dir); 2600 } 2601 2602 if ((status < 0) && inode) { 2603 clear_nlink(inode); 2604 iput(inode); 2605 } 2606 2607 if (inode_ac) 2608 ocfs2_free_alloc_context(inode_ac); 2609 2610 brelse(new_di_bh); 2611 2612 if (!status) 2613 *new_inode = inode; 2614 2615 ocfs2_free_dir_lookup_result(&orphan_insert); 2616 2617 ocfs2_inode_unlock(dir, 1); 2618 brelse(parent_di_bh); 2619 return status; 2620 } 2621 2622 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, 2623 struct inode *inode) 2624 { 2625 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2626 struct inode *orphan_dir_inode = NULL; 2627 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2628 struct buffer_head *di_bh = NULL; 2629 int status = 0; 2630 handle_t *handle = NULL; 2631 struct ocfs2_dinode *di = NULL; 2632 2633 status = ocfs2_inode_lock(inode, &di_bh, 1); 2634 if (status < 0) { 2635 mlog_errno(status); 2636 goto bail; 2637 } 2638 2639 di = (struct ocfs2_dinode *) di_bh->b_data; 2640 /* 2641 * Another append dio crashed? 2642 * If so, manually recover it first. 2643 */ 2644 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 2645 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode)); 2646 if (status < 0) { 2647 if (status != -ENOSPC) 2648 mlog_errno(status); 2649 goto bail_unlock_inode; 2650 } 2651 2652 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0); 2653 if (status < 0) { 2654 mlog_errno(status); 2655 goto bail_unlock_inode; 2656 } 2657 } 2658 2659 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, 2660 OCFS2_I(inode)->ip_blkno, 2661 orphan_name, 2662 &orphan_insert, 2663 true); 2664 if (status < 0) { 2665 mlog_errno(status); 2666 goto bail_unlock_inode; 2667 } 2668 2669 handle = ocfs2_start_trans(osb, 2670 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); 2671 if (IS_ERR(handle)) { 2672 status = PTR_ERR(handle); 2673 goto bail_unlock_orphan; 2674 } 2675 2676 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, 2677 &orphan_insert, orphan_dir_inode, true); 2678 if (status) 2679 mlog_errno(status); 2680 2681 ocfs2_commit_trans(osb, handle); 2682 2683 bail_unlock_orphan: 2684 ocfs2_inode_unlock(orphan_dir_inode, 1); 2685 mutex_unlock(&orphan_dir_inode->i_mutex); 2686 iput(orphan_dir_inode); 2687 2688 ocfs2_free_dir_lookup_result(&orphan_insert); 2689 2690 bail_unlock_inode: 2691 ocfs2_inode_unlock(inode, 1); 2692 brelse(di_bh); 2693 2694 bail: 2695 return status; 2696 } 2697 2698 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, 2699 struct inode *inode, struct buffer_head *di_bh, 2700 int update_isize, loff_t end) 2701 { 2702 struct inode *orphan_dir_inode = NULL; 2703 struct buffer_head *orphan_dir_bh = NULL; 2704 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2705 handle_t *handle = NULL; 2706 int status = 0; 2707 2708 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2709 ORPHAN_DIR_SYSTEM_INODE, 2710 le16_to_cpu(di->i_dio_orphaned_slot)); 2711 if (!orphan_dir_inode) { 2712 status = -ENOENT; 2713 mlog_errno(status); 2714 goto bail; 2715 } 2716 2717 mutex_lock(&orphan_dir_inode->i_mutex); 2718 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2719 if (status < 0) { 2720 mutex_unlock(&orphan_dir_inode->i_mutex); 2721 iput(orphan_dir_inode); 2722 mlog_errno(status); 2723 goto bail; 2724 } 2725 2726 handle = ocfs2_start_trans(osb, 2727 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); 2728 if (IS_ERR(handle)) { 2729 status = PTR_ERR(handle); 2730 goto bail_unlock_orphan; 2731 } 2732 2733 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); 2734 2735 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, 2736 inode, orphan_dir_bh, true); 2737 if (status < 0) { 2738 mlog_errno(status); 2739 goto bail_commit; 2740 } 2741 2742 status = ocfs2_journal_access_di(handle, 2743 INODE_CACHE(inode), 2744 di_bh, 2745 OCFS2_JOURNAL_ACCESS_WRITE); 2746 if (status < 0) { 2747 mlog_errno(status); 2748 goto bail_commit; 2749 } 2750 2751 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2752 di->i_dio_orphaned_slot = 0; 2753 2754 if (update_isize) { 2755 status = ocfs2_set_inode_size(handle, inode, di_bh, end); 2756 if (status) 2757 mlog_errno(status); 2758 } else 2759 ocfs2_journal_dirty(handle, di_bh); 2760 2761 bail_commit: 2762 ocfs2_commit_trans(osb, handle); 2763 2764 bail_unlock_orphan: 2765 ocfs2_inode_unlock(orphan_dir_inode, 1); 2766 mutex_unlock(&orphan_dir_inode->i_mutex); 2767 brelse(orphan_dir_bh); 2768 iput(orphan_dir_inode); 2769 2770 bail: 2771 return status; 2772 } 2773 2774 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2775 struct inode *inode, 2776 struct dentry *dentry) 2777 { 2778 int status = 0; 2779 struct buffer_head *parent_di_bh = NULL; 2780 handle_t *handle = NULL; 2781 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2782 struct ocfs2_dinode *dir_di, *di; 2783 struct inode *orphan_dir_inode = NULL; 2784 struct buffer_head *orphan_dir_bh = NULL; 2785 struct buffer_head *di_bh = NULL; 2786 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2787 2788 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, 2789 dentry->d_name.len, dentry->d_name.name, 2790 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2791 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2792 2793 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2794 if (status < 0) { 2795 if (status != -ENOENT) 2796 mlog_errno(status); 2797 return status; 2798 } 2799 2800 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2801 if (!dir_di->i_links_count) { 2802 /* can't make a file in a deleted directory. */ 2803 status = -ENOENT; 2804 goto leave; 2805 } 2806 2807 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2808 dentry->d_name.len); 2809 if (status) 2810 goto leave; 2811 2812 /* get a spot inside the dir. */ 2813 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2814 dentry->d_name.name, 2815 dentry->d_name.len, &lookup); 2816 if (status < 0) { 2817 mlog_errno(status); 2818 goto leave; 2819 } 2820 2821 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2822 ORPHAN_DIR_SYSTEM_INODE, 2823 osb->slot_num); 2824 if (!orphan_dir_inode) { 2825 status = -ENOENT; 2826 mlog_errno(status); 2827 goto leave; 2828 } 2829 2830 mutex_lock(&orphan_dir_inode->i_mutex); 2831 2832 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2833 if (status < 0) { 2834 mlog_errno(status); 2835 mutex_unlock(&orphan_dir_inode->i_mutex); 2836 iput(orphan_dir_inode); 2837 goto leave; 2838 } 2839 2840 status = ocfs2_read_inode_block(inode, &di_bh); 2841 if (status < 0) { 2842 mlog_errno(status); 2843 goto orphan_unlock; 2844 } 2845 2846 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2847 if (IS_ERR(handle)) { 2848 status = PTR_ERR(handle); 2849 handle = NULL; 2850 mlog_errno(status); 2851 goto orphan_unlock; 2852 } 2853 2854 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2855 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2856 if (status < 0) { 2857 mlog_errno(status); 2858 goto out_commit; 2859 } 2860 2861 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2862 orphan_dir_bh, false); 2863 if (status < 0) { 2864 mlog_errno(status); 2865 goto out_commit; 2866 } 2867 2868 di = (struct ocfs2_dinode *)di_bh->b_data; 2869 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); 2870 di->i_orphaned_slot = 0; 2871 set_nlink(inode, 1); 2872 ocfs2_set_links_count(di, inode->i_nlink); 2873 ocfs2_update_inode_fsync_trans(handle, inode, 1); 2874 ocfs2_journal_dirty(handle, di_bh); 2875 2876 status = ocfs2_add_entry(handle, dentry, inode, 2877 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2878 &lookup); 2879 if (status < 0) { 2880 mlog_errno(status); 2881 goto out_commit; 2882 } 2883 2884 status = ocfs2_dentry_attach_lock(dentry, inode, 2885 OCFS2_I(dir)->ip_blkno); 2886 if (status) { 2887 mlog_errno(status); 2888 goto out_commit; 2889 } 2890 2891 d_instantiate(dentry, inode); 2892 status = 0; 2893 out_commit: 2894 ocfs2_commit_trans(osb, handle); 2895 orphan_unlock: 2896 ocfs2_inode_unlock(orphan_dir_inode, 1); 2897 mutex_unlock(&orphan_dir_inode->i_mutex); 2898 iput(orphan_dir_inode); 2899 leave: 2900 2901 ocfs2_inode_unlock(dir, 1); 2902 2903 brelse(di_bh); 2904 brelse(parent_di_bh); 2905 brelse(orphan_dir_bh); 2906 2907 ocfs2_free_dir_lookup_result(&lookup); 2908 2909 if (status) 2910 mlog_errno(status); 2911 2912 return status; 2913 } 2914 2915 const struct inode_operations ocfs2_dir_iops = { 2916 .create = ocfs2_create, 2917 .lookup = ocfs2_lookup, 2918 .link = ocfs2_link, 2919 .unlink = ocfs2_unlink, 2920 .rmdir = ocfs2_unlink, 2921 .symlink = ocfs2_symlink, 2922 .mkdir = ocfs2_mkdir, 2923 .mknod = ocfs2_mknod, 2924 .rename = ocfs2_rename, 2925 .setattr = ocfs2_setattr, 2926 .getattr = ocfs2_getattr, 2927 .permission = ocfs2_permission, 2928 .setxattr = generic_setxattr, 2929 .getxattr = generic_getxattr, 2930 .listxattr = ocfs2_listxattr, 2931 .removexattr = generic_removexattr, 2932 .fiemap = ocfs2_fiemap, 2933 .get_acl = ocfs2_iop_get_acl, 2934 .set_acl = ocfs2_iop_set_acl, 2935 }; 2936