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 posix_acl *default_acl = NULL, *acl = NULL; 263 struct ocfs2_dentry_lock *dl = NULL; 264 265 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name, 266 (unsigned long long)OCFS2_I(dir)->ip_blkno, 267 (unsigned long)dev, mode); 268 269 status = dquot_initialize(dir); 270 if (status) { 271 mlog_errno(status); 272 return status; 273 } 274 275 /* get our super block */ 276 osb = OCFS2_SB(dir->i_sb); 277 278 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 279 if (status < 0) { 280 if (status != -ENOENT) 281 mlog_errno(status); 282 return status; 283 } 284 285 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) { 286 status = -EMLINK; 287 goto leave; 288 } 289 290 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 291 if (!ocfs2_read_links_count(dirfe)) { 292 /* can't make a file in a deleted directory. */ 293 status = -ENOENT; 294 goto leave; 295 } 296 297 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 298 dentry->d_name.len); 299 if (status) 300 goto leave; 301 302 /* get a spot inside the dir. */ 303 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 304 dentry->d_name.name, 305 dentry->d_name.len, &lookup); 306 if (status < 0) { 307 mlog_errno(status); 308 goto leave; 309 } 310 311 /* reserve an inode spot */ 312 status = ocfs2_reserve_new_inode(osb, &inode_ac); 313 if (status < 0) { 314 if (status != -ENOSPC) 315 mlog_errno(status); 316 goto leave; 317 } 318 319 inode = ocfs2_get_init_inode(dir, mode); 320 if (IS_ERR(inode)) { 321 status = PTR_ERR(inode); 322 inode = NULL; 323 mlog_errno(status); 324 goto leave; 325 } 326 327 /* get security xattr */ 328 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 329 if (status) { 330 if (status == -EOPNOTSUPP) 331 si.enable = 0; 332 else { 333 mlog_errno(status); 334 goto leave; 335 } 336 } 337 338 /* calculate meta data/clusters for setting security and acl xattr */ 339 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode, 340 &si, &want_clusters, 341 &xattr_credits, &want_meta); 342 if (status < 0) { 343 mlog_errno(status); 344 goto leave; 345 } 346 347 /* Reserve a cluster if creating an extent based directory. */ 348 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { 349 want_clusters += 1; 350 351 /* Dir indexing requires extra space as well */ 352 if (ocfs2_supports_indexed_dirs(osb)) 353 want_meta++; 354 } 355 356 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac); 357 if (status < 0) { 358 if (status != -ENOSPC) 359 mlog_errno(status); 360 goto leave; 361 } 362 363 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 364 if (status < 0) { 365 if (status != -ENOSPC) 366 mlog_errno(status); 367 goto leave; 368 } 369 370 status = posix_acl_create(dir, &mode, &default_acl, &acl); 371 if (status) { 372 mlog_errno(status); 373 goto leave; 374 } 375 /* update inode->i_mode after mask with "umask". */ 376 inode->i_mode = mode; 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 status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, 661 parent_fe_bh, handle, inode_ac, 662 fe_blkno, suballoc_loc, suballoc_bit); 663 if (status < 0) { 664 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit); 665 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode, 666 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1); 667 if (tmp) 668 mlog_errno(tmp); 669 } 670 671 return status; 672 } 673 674 static int ocfs2_mkdir(struct inode *dir, 675 struct dentry *dentry, 676 umode_t mode) 677 { 678 int ret; 679 680 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, 681 OCFS2_I(dir)->ip_blkno, mode); 682 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); 683 if (ret) 684 mlog_errno(ret); 685 686 return ret; 687 } 688 689 static int ocfs2_create(struct inode *dir, 690 struct dentry *dentry, 691 umode_t mode, 692 bool excl) 693 { 694 int ret; 695 696 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name, 697 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode); 698 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); 699 if (ret) 700 mlog_errno(ret); 701 702 return ret; 703 } 704 705 static int ocfs2_link(struct dentry *old_dentry, 706 struct inode *dir, 707 struct dentry *dentry) 708 { 709 handle_t *handle; 710 struct inode *inode = d_inode(old_dentry); 711 struct inode *old_dir = d_inode(old_dentry->d_parent); 712 int err; 713 struct buffer_head *fe_bh = NULL; 714 struct buffer_head *old_dir_bh = NULL; 715 struct buffer_head *parent_fe_bh = NULL; 716 struct ocfs2_dinode *fe = NULL; 717 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 718 struct ocfs2_dir_lookup_result lookup = { NULL, }; 719 sigset_t oldset; 720 u64 old_de_ino; 721 722 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno, 723 old_dentry->d_name.len, old_dentry->d_name.name, 724 dentry->d_name.len, dentry->d_name.name); 725 726 if (S_ISDIR(inode->i_mode)) 727 return -EPERM; 728 729 err = dquot_initialize(dir); 730 if (err) { 731 mlog_errno(err); 732 return err; 733 } 734 735 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 736 &parent_fe_bh, dir, 0); 737 if (err < 0) { 738 if (err != -ENOENT) 739 mlog_errno(err); 740 return err; 741 } 742 743 /* make sure both dirs have bhs 744 * get an extra ref on old_dir_bh if old==new */ 745 if (!parent_fe_bh) { 746 if (old_dir_bh) { 747 parent_fe_bh = old_dir_bh; 748 get_bh(parent_fe_bh); 749 } else { 750 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str); 751 err = -EIO; 752 goto out; 753 } 754 } 755 756 if (!dir->i_nlink) { 757 err = -ENOENT; 758 goto out; 759 } 760 761 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 762 old_dentry->d_name.len, &old_de_ino); 763 if (err) { 764 err = -ENOENT; 765 goto out; 766 } 767 768 /* 769 * Check whether another node removed the source inode while we 770 * were in the vfs. 771 */ 772 if (old_de_ino != OCFS2_I(inode)->ip_blkno) { 773 err = -ENOENT; 774 goto out; 775 } 776 777 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 778 dentry->d_name.len); 779 if (err) 780 goto out; 781 782 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 783 dentry->d_name.name, 784 dentry->d_name.len, &lookup); 785 if (err < 0) { 786 mlog_errno(err); 787 goto out; 788 } 789 790 err = ocfs2_inode_lock(inode, &fe_bh, 1); 791 if (err < 0) { 792 if (err != -ENOENT) 793 mlog_errno(err); 794 goto out; 795 } 796 797 fe = (struct ocfs2_dinode *) fe_bh->b_data; 798 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { 799 err = -EMLINK; 800 goto out_unlock_inode; 801 } 802 803 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); 804 if (IS_ERR(handle)) { 805 err = PTR_ERR(handle); 806 handle = NULL; 807 mlog_errno(err); 808 goto out_unlock_inode; 809 } 810 811 /* Starting to change things, restart is no longer possible. */ 812 ocfs2_block_signals(&oldset); 813 814 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 815 OCFS2_JOURNAL_ACCESS_WRITE); 816 if (err < 0) { 817 mlog_errno(err); 818 goto out_commit; 819 } 820 821 inc_nlink(inode); 822 inode->i_ctime = CURRENT_TIME; 823 ocfs2_set_links_count(fe, inode->i_nlink); 824 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 825 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 826 ocfs2_journal_dirty(handle, fe_bh); 827 828 err = ocfs2_add_entry(handle, dentry, inode, 829 OCFS2_I(inode)->ip_blkno, 830 parent_fe_bh, &lookup); 831 if (err) { 832 ocfs2_add_links_count(fe, -1); 833 drop_nlink(inode); 834 mlog_errno(err); 835 goto out_commit; 836 } 837 838 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 839 if (err) { 840 mlog_errno(err); 841 goto out_commit; 842 } 843 844 ihold(inode); 845 d_instantiate(dentry, inode); 846 847 out_commit: 848 ocfs2_commit_trans(osb, handle); 849 ocfs2_unblock_signals(&oldset); 850 out_unlock_inode: 851 ocfs2_inode_unlock(inode, 1); 852 853 out: 854 ocfs2_double_unlock(old_dir, dir); 855 856 brelse(fe_bh); 857 brelse(parent_fe_bh); 858 brelse(old_dir_bh); 859 860 ocfs2_free_dir_lookup_result(&lookup); 861 862 if (err) 863 mlog_errno(err); 864 865 return err; 866 } 867 868 /* 869 * Takes and drops an exclusive lock on the given dentry. This will 870 * force other nodes to drop it. 871 */ 872 static int ocfs2_remote_dentry_delete(struct dentry *dentry) 873 { 874 int ret; 875 876 ret = ocfs2_dentry_lock(dentry, 1); 877 if (ret) 878 mlog_errno(ret); 879 else 880 ocfs2_dentry_unlock(dentry, 1); 881 882 return ret; 883 } 884 885 static inline int ocfs2_inode_is_unlinkable(struct inode *inode) 886 { 887 if (S_ISDIR(inode->i_mode)) { 888 if (inode->i_nlink == 2) 889 return 1; 890 return 0; 891 } 892 893 if (inode->i_nlink == 1) 894 return 1; 895 return 0; 896 } 897 898 static int ocfs2_unlink(struct inode *dir, 899 struct dentry *dentry) 900 { 901 int status; 902 int child_locked = 0; 903 bool is_unlinkable = false; 904 struct inode *inode = d_inode(dentry); 905 struct inode *orphan_dir = NULL; 906 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 907 u64 blkno; 908 struct ocfs2_dinode *fe = NULL; 909 struct buffer_head *fe_bh = NULL; 910 struct buffer_head *parent_node_bh = NULL; 911 handle_t *handle = NULL; 912 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 913 struct ocfs2_dir_lookup_result lookup = { NULL, }; 914 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 915 916 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, 917 dentry->d_name.name, 918 (unsigned long long)OCFS2_I(dir)->ip_blkno, 919 (unsigned long long)OCFS2_I(inode)->ip_blkno); 920 921 status = dquot_initialize(dir); 922 if (status) { 923 mlog_errno(status); 924 return status; 925 } 926 927 BUG_ON(d_inode(dentry->d_parent) != dir); 928 929 if (inode == osb->root_inode) 930 return -EPERM; 931 932 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 933 OI_LS_PARENT); 934 if (status < 0) { 935 if (status != -ENOENT) 936 mlog_errno(status); 937 return status; 938 } 939 940 status = ocfs2_find_files_on_disk(dentry->d_name.name, 941 dentry->d_name.len, &blkno, dir, 942 &lookup); 943 if (status < 0) { 944 if (status != -ENOENT) 945 mlog_errno(status); 946 goto leave; 947 } 948 949 if (OCFS2_I(inode)->ip_blkno != blkno) { 950 status = -ENOENT; 951 952 trace_ocfs2_unlink_noent( 953 (unsigned long long)OCFS2_I(inode)->ip_blkno, 954 (unsigned long long)blkno, 955 OCFS2_I(inode)->ip_flags); 956 goto leave; 957 } 958 959 status = ocfs2_inode_lock(inode, &fe_bh, 1); 960 if (status < 0) { 961 if (status != -ENOENT) 962 mlog_errno(status); 963 goto leave; 964 } 965 child_locked = 1; 966 967 if (S_ISDIR(inode->i_mode)) { 968 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 969 status = -ENOTEMPTY; 970 goto leave; 971 } 972 } 973 974 status = ocfs2_remote_dentry_delete(dentry); 975 if (status < 0) { 976 /* This remote delete should succeed under all normal 977 * circumstances. */ 978 mlog_errno(status); 979 goto leave; 980 } 981 982 if (ocfs2_inode_is_unlinkable(inode)) { 983 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 984 OCFS2_I(inode)->ip_blkno, 985 orphan_name, &orphan_insert, 986 false); 987 if (status < 0) { 988 mlog_errno(status); 989 goto leave; 990 } 991 is_unlinkable = true; 992 } 993 994 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 995 if (IS_ERR(handle)) { 996 status = PTR_ERR(handle); 997 handle = NULL; 998 mlog_errno(status); 999 goto leave; 1000 } 1001 1002 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 1003 OCFS2_JOURNAL_ACCESS_WRITE); 1004 if (status < 0) { 1005 mlog_errno(status); 1006 goto leave; 1007 } 1008 1009 fe = (struct ocfs2_dinode *) fe_bh->b_data; 1010 1011 /* delete the name from the parent dir */ 1012 status = ocfs2_delete_entry(handle, dir, &lookup); 1013 if (status < 0) { 1014 mlog_errno(status); 1015 goto leave; 1016 } 1017 1018 if (S_ISDIR(inode->i_mode)) 1019 drop_nlink(inode); 1020 drop_nlink(inode); 1021 ocfs2_set_links_count(fe, inode->i_nlink); 1022 ocfs2_journal_dirty(handle, fe_bh); 1023 1024 dir->i_ctime = dir->i_mtime = CURRENT_TIME; 1025 if (S_ISDIR(inode->i_mode)) 1026 drop_nlink(dir); 1027 1028 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 1029 if (status < 0) { 1030 mlog_errno(status); 1031 if (S_ISDIR(inode->i_mode)) 1032 inc_nlink(dir); 1033 goto leave; 1034 } 1035 1036 if (is_unlinkable) { 1037 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, 1038 orphan_name, &orphan_insert, orphan_dir, false); 1039 if (status < 0) 1040 mlog_errno(status); 1041 } 1042 1043 leave: 1044 if (handle) 1045 ocfs2_commit_trans(osb, handle); 1046 1047 if (orphan_dir) { 1048 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1049 ocfs2_inode_unlock(orphan_dir, 1); 1050 mutex_unlock(&orphan_dir->i_mutex); 1051 iput(orphan_dir); 1052 } 1053 1054 if (child_locked) 1055 ocfs2_inode_unlock(inode, 1); 1056 1057 ocfs2_inode_unlock(dir, 1); 1058 1059 brelse(fe_bh); 1060 brelse(parent_node_bh); 1061 1062 ocfs2_free_dir_lookup_result(&orphan_insert); 1063 ocfs2_free_dir_lookup_result(&lookup); 1064 1065 if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) 1066 mlog_errno(status); 1067 1068 return status; 1069 } 1070 1071 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, 1072 u64 src_inode_no, u64 dest_inode_no) 1073 { 1074 int ret = 0, i = 0; 1075 u64 parent_inode_no = 0; 1076 u64 child_inode_no = src_inode_no; 1077 struct inode *child_inode; 1078 1079 #define MAX_LOOKUP_TIMES 32 1080 while (1) { 1081 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); 1082 if (IS_ERR(child_inode)) { 1083 ret = PTR_ERR(child_inode); 1084 break; 1085 } 1086 1087 ret = ocfs2_inode_lock(child_inode, NULL, 0); 1088 if (ret < 0) { 1089 iput(child_inode); 1090 if (ret != -ENOENT) 1091 mlog_errno(ret); 1092 break; 1093 } 1094 1095 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, 1096 &parent_inode_no); 1097 ocfs2_inode_unlock(child_inode, 0); 1098 iput(child_inode); 1099 if (ret < 0) { 1100 ret = -ENOENT; 1101 break; 1102 } 1103 1104 if (parent_inode_no == dest_inode_no) { 1105 ret = 1; 1106 break; 1107 } 1108 1109 if (parent_inode_no == osb->root_inode->i_ino) { 1110 ret = 0; 1111 break; 1112 } 1113 1114 child_inode_no = parent_inode_no; 1115 1116 if (++i >= MAX_LOOKUP_TIMES) { 1117 mlog(ML_NOTICE, "max lookup times reached, filesystem " 1118 "may have nested directories, " 1119 "src inode: %llu, dest inode: %llu.\n", 1120 (unsigned long long)src_inode_no, 1121 (unsigned long long)dest_inode_no); 1122 ret = 0; 1123 break; 1124 } 1125 } 1126 1127 return ret; 1128 } 1129 1130 /* 1131 * The only place this should be used is rename and link! 1132 * if they have the same id, then the 1st one is the only one locked. 1133 */ 1134 static int ocfs2_double_lock(struct ocfs2_super *osb, 1135 struct buffer_head **bh1, 1136 struct inode *inode1, 1137 struct buffer_head **bh2, 1138 struct inode *inode2, 1139 int rename) 1140 { 1141 int status; 1142 int inode1_is_ancestor, inode2_is_ancestor; 1143 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 1144 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 1145 1146 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 1147 (unsigned long long)oi2->ip_blkno); 1148 1149 if (*bh1) 1150 *bh1 = NULL; 1151 if (*bh2) 1152 *bh2 = NULL; 1153 1154 /* we always want to lock the one with the lower lockid first. 1155 * and if they are nested, we lock ancestor first */ 1156 if (oi1->ip_blkno != oi2->ip_blkno) { 1157 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, 1158 oi1->ip_blkno); 1159 if (inode1_is_ancestor < 0) { 1160 status = inode1_is_ancestor; 1161 goto bail; 1162 } 1163 1164 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, 1165 oi2->ip_blkno); 1166 if (inode2_is_ancestor < 0) { 1167 status = inode2_is_ancestor; 1168 goto bail; 1169 } 1170 1171 if ((inode1_is_ancestor == 1) || 1172 (oi1->ip_blkno < oi2->ip_blkno && 1173 inode2_is_ancestor == 0)) { 1174 /* switch id1 and id2 around */ 1175 swap(bh2, bh1); 1176 swap(inode2, inode1); 1177 } 1178 /* lock id2 */ 1179 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 1180 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); 1181 if (status < 0) { 1182 if (status != -ENOENT) 1183 mlog_errno(status); 1184 goto bail; 1185 } 1186 } 1187 1188 /* lock id1 */ 1189 status = ocfs2_inode_lock_nested(inode1, bh1, 1, 1190 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 1191 if (status < 0) { 1192 /* 1193 * An error return must mean that no cluster locks 1194 * were held on function exit. 1195 */ 1196 if (oi1->ip_blkno != oi2->ip_blkno) { 1197 ocfs2_inode_unlock(inode2, 1); 1198 brelse(*bh2); 1199 *bh2 = NULL; 1200 } 1201 1202 if (status != -ENOENT) 1203 mlog_errno(status); 1204 } 1205 1206 trace_ocfs2_double_lock_end( 1207 (unsigned long long)OCFS2_I(inode1)->ip_blkno, 1208 (unsigned long long)OCFS2_I(inode2)->ip_blkno); 1209 1210 bail: 1211 if (status) 1212 mlog_errno(status); 1213 return status; 1214 } 1215 1216 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1217 { 1218 ocfs2_inode_unlock(inode1, 1); 1219 1220 if (inode1 != inode2) 1221 ocfs2_inode_unlock(inode2, 1); 1222 } 1223 1224 static int ocfs2_rename(struct inode *old_dir, 1225 struct dentry *old_dentry, 1226 struct inode *new_dir, 1227 struct dentry *new_dentry) 1228 { 1229 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1230 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1231 struct inode *old_inode = d_inode(old_dentry); 1232 struct inode *new_inode = d_inode(new_dentry); 1233 struct inode *orphan_dir = NULL; 1234 struct ocfs2_dinode *newfe = NULL; 1235 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1236 struct buffer_head *newfe_bh = NULL; 1237 struct buffer_head *old_inode_bh = NULL; 1238 struct ocfs2_super *osb = NULL; 1239 u64 newfe_blkno, old_de_ino; 1240 handle_t *handle = NULL; 1241 struct buffer_head *old_dir_bh = NULL; 1242 struct buffer_head *new_dir_bh = NULL; 1243 u32 old_dir_nlink = old_dir->i_nlink; 1244 struct ocfs2_dinode *old_di; 1245 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1246 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1247 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1248 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1249 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1250 bool should_add_orphan = false; 1251 1252 /* At some point it might be nice to break this function up a 1253 * bit. */ 1254 1255 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, 1256 old_dentry->d_name.len, old_dentry->d_name.name, 1257 new_dentry->d_name.len, new_dentry->d_name.name); 1258 1259 status = dquot_initialize(old_dir); 1260 if (status) { 1261 mlog_errno(status); 1262 goto bail; 1263 } 1264 status = dquot_initialize(new_dir); 1265 if (status) { 1266 mlog_errno(status); 1267 goto bail; 1268 } 1269 1270 osb = OCFS2_SB(old_dir->i_sb); 1271 1272 if (new_inode) { 1273 if (!igrab(new_inode)) 1274 BUG(); 1275 } 1276 1277 /* Assume a directory hierarchy thusly: 1278 * a/b/c 1279 * a/d 1280 * a,b,c, and d are all directories. 1281 * 1282 * from cwd of 'a' on both nodes: 1283 * node1: mv b/c d 1284 * node2: mv d b/c 1285 * 1286 * And that's why, just like the VFS, we need a file system 1287 * rename lock. */ 1288 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1289 status = ocfs2_rename_lock(osb); 1290 if (status < 0) { 1291 mlog_errno(status); 1292 goto bail; 1293 } 1294 rename_lock = 1; 1295 1296 /* here we cannot guarantee the inodes haven't just been 1297 * changed, so check if they are nested again */ 1298 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, 1299 old_inode->i_ino); 1300 if (status < 0) { 1301 mlog_errno(status); 1302 goto bail; 1303 } else if (status == 1) { 1304 status = -EPERM; 1305 trace_ocfs2_rename_not_permitted( 1306 (unsigned long long)old_inode->i_ino, 1307 (unsigned long long)new_dir->i_ino); 1308 goto bail; 1309 } 1310 } 1311 1312 /* if old and new are the same, this'll just do one lock. */ 1313 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1314 &new_dir_bh, new_dir, 1); 1315 if (status < 0) { 1316 mlog_errno(status); 1317 goto bail; 1318 } 1319 parents_locked = 1; 1320 1321 if (!new_dir->i_nlink) { 1322 status = -EACCES; 1323 goto bail; 1324 } 1325 1326 /* make sure both dirs have bhs 1327 * get an extra ref on old_dir_bh if old==new */ 1328 if (!new_dir_bh) { 1329 if (old_dir_bh) { 1330 new_dir_bh = old_dir_bh; 1331 get_bh(new_dir_bh); 1332 } else { 1333 mlog(ML_ERROR, "no old_dir_bh!\n"); 1334 status = -EIO; 1335 goto bail; 1336 } 1337 } 1338 1339 /* 1340 * Aside from allowing a meta data update, the locking here 1341 * also ensures that the downconvert thread on other nodes 1342 * won't have to concurrently downconvert the inode and the 1343 * dentry locks. 1344 */ 1345 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1346 OI_LS_PARENT); 1347 if (status < 0) { 1348 if (status != -ENOENT) 1349 mlog_errno(status); 1350 goto bail; 1351 } 1352 old_child_locked = 1; 1353 1354 status = ocfs2_remote_dentry_delete(old_dentry); 1355 if (status < 0) { 1356 mlog_errno(status); 1357 goto bail; 1358 } 1359 1360 if (S_ISDIR(old_inode->i_mode)) { 1361 u64 old_inode_parent; 1362 1363 update_dot_dot = 1; 1364 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1365 old_inode, 1366 &old_inode_dot_dot_res); 1367 if (status) { 1368 status = -EIO; 1369 goto bail; 1370 } 1371 1372 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1373 status = -EIO; 1374 goto bail; 1375 } 1376 1377 if (!new_inode && new_dir != old_dir && 1378 new_dir->i_nlink >= ocfs2_link_max(osb)) { 1379 status = -EMLINK; 1380 goto bail; 1381 } 1382 } 1383 1384 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1385 old_dentry->d_name.len, 1386 &old_de_ino); 1387 if (status) { 1388 status = -ENOENT; 1389 goto bail; 1390 } 1391 1392 /* 1393 * Check for inode number is _not_ due to possible IO errors. 1394 * We might rmdir the source, keep it as pwd of some process 1395 * and merrily kill the link to whatever was created under the 1396 * same name. Goodbye sticky bit ;-< 1397 */ 1398 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1399 status = -ENOENT; 1400 goto bail; 1401 } 1402 1403 /* check if the target already exists (in which case we need 1404 * to delete it */ 1405 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1406 new_dentry->d_name.len, 1407 &newfe_blkno, new_dir, 1408 &target_lookup_res); 1409 /* The only error we allow here is -ENOENT because the new 1410 * file not existing is perfectly valid. */ 1411 if ((status < 0) && (status != -ENOENT)) { 1412 /* If we cannot find the file specified we should just */ 1413 /* return the error... */ 1414 mlog_errno(status); 1415 goto bail; 1416 } 1417 if (status == 0) 1418 target_exists = 1; 1419 1420 if (!target_exists && new_inode) { 1421 /* 1422 * Target was unlinked by another node while we were 1423 * waiting to get to ocfs2_rename(). There isn't 1424 * anything we can do here to help the situation, so 1425 * bubble up the appropriate error. 1426 */ 1427 status = -ENOENT; 1428 goto bail; 1429 } 1430 1431 /* In case we need to overwrite an existing file, we blow it 1432 * away first */ 1433 if (target_exists) { 1434 /* VFS didn't think there existed an inode here, but 1435 * someone else in the cluster must have raced our 1436 * rename to create one. Today we error cleanly, in 1437 * the future we should consider calling iget to build 1438 * a new struct inode for this entry. */ 1439 if (!new_inode) { 1440 status = -EACCES; 1441 1442 trace_ocfs2_rename_target_exists(new_dentry->d_name.len, 1443 new_dentry->d_name.name); 1444 goto bail; 1445 } 1446 1447 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1448 status = -EACCES; 1449 1450 trace_ocfs2_rename_disagree( 1451 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1452 (unsigned long long)newfe_blkno, 1453 OCFS2_I(new_inode)->ip_flags); 1454 goto bail; 1455 } 1456 1457 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1458 if (status < 0) { 1459 if (status != -ENOENT) 1460 mlog_errno(status); 1461 goto bail; 1462 } 1463 new_child_locked = 1; 1464 1465 status = ocfs2_remote_dentry_delete(new_dentry); 1466 if (status < 0) { 1467 mlog_errno(status); 1468 goto bail; 1469 } 1470 1471 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1472 1473 trace_ocfs2_rename_over_existing( 1474 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1475 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1476 1477 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1478 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1479 OCFS2_I(new_inode)->ip_blkno, 1480 orphan_name, &orphan_insert, 1481 false); 1482 if (status < 0) { 1483 mlog_errno(status); 1484 goto bail; 1485 } 1486 should_add_orphan = true; 1487 } 1488 } else { 1489 BUG_ON(d_inode(new_dentry->d_parent) != new_dir); 1490 1491 status = ocfs2_check_dir_for_entry(new_dir, 1492 new_dentry->d_name.name, 1493 new_dentry->d_name.len); 1494 if (status) 1495 goto bail; 1496 1497 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1498 new_dentry->d_name.name, 1499 new_dentry->d_name.len, 1500 &target_insert); 1501 if (status < 0) { 1502 mlog_errno(status); 1503 goto bail; 1504 } 1505 } 1506 1507 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1508 if (IS_ERR(handle)) { 1509 status = PTR_ERR(handle); 1510 handle = NULL; 1511 mlog_errno(status); 1512 goto bail; 1513 } 1514 1515 if (target_exists) { 1516 if (S_ISDIR(new_inode->i_mode)) { 1517 if (new_inode->i_nlink != 2 || 1518 !ocfs2_empty_dir(new_inode)) { 1519 status = -ENOTEMPTY; 1520 goto bail; 1521 } 1522 } 1523 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1524 newfe_bh, 1525 OCFS2_JOURNAL_ACCESS_WRITE); 1526 if (status < 0) { 1527 mlog_errno(status); 1528 goto bail; 1529 } 1530 1531 /* change the dirent to point to the correct inode */ 1532 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1533 old_inode); 1534 if (status < 0) { 1535 mlog_errno(status); 1536 goto bail; 1537 } 1538 new_dir->i_version++; 1539 1540 if (S_ISDIR(new_inode->i_mode)) 1541 ocfs2_set_links_count(newfe, 0); 1542 else 1543 ocfs2_add_links_count(newfe, -1); 1544 ocfs2_journal_dirty(handle, newfe_bh); 1545 if (should_add_orphan) { 1546 status = ocfs2_orphan_add(osb, handle, new_inode, 1547 newfe_bh, orphan_name, 1548 &orphan_insert, orphan_dir, false); 1549 if (status < 0) { 1550 mlog_errno(status); 1551 goto bail; 1552 } 1553 } 1554 } else { 1555 /* if the name was not found in new_dir, add it now */ 1556 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1557 OCFS2_I(old_inode)->ip_blkno, 1558 new_dir_bh, &target_insert); 1559 } 1560 1561 old_inode->i_ctime = CURRENT_TIME; 1562 mark_inode_dirty(old_inode); 1563 1564 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1565 old_inode_bh, 1566 OCFS2_JOURNAL_ACCESS_WRITE); 1567 if (status >= 0) { 1568 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1569 1570 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); 1571 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); 1572 ocfs2_journal_dirty(handle, old_inode_bh); 1573 } else 1574 mlog_errno(status); 1575 1576 /* 1577 * Now that the name has been added to new_dir, remove the old name. 1578 * 1579 * We don't keep any directory entry context around until now 1580 * because the insert might have changed the type of directory 1581 * we're dealing with. 1582 */ 1583 status = ocfs2_find_entry(old_dentry->d_name.name, 1584 old_dentry->d_name.len, old_dir, 1585 &old_entry_lookup); 1586 if (status) { 1587 if (!is_journal_aborted(osb->journal->j_journal)) { 1588 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1589 "is not deleted.", 1590 new_dentry->d_name.len, new_dentry->d_name.name, 1591 old_dentry->d_name.len, old_dentry->d_name.name); 1592 } 1593 goto bail; 1594 } 1595 1596 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1597 if (status < 0) { 1598 mlog_errno(status); 1599 if (!is_journal_aborted(osb->journal->j_journal)) { 1600 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1601 "is not deleted.", 1602 new_dentry->d_name.len, new_dentry->d_name.name, 1603 old_dentry->d_name.len, old_dentry->d_name.name); 1604 } 1605 goto bail; 1606 } 1607 1608 if (new_inode) { 1609 drop_nlink(new_inode); 1610 new_inode->i_ctime = CURRENT_TIME; 1611 } 1612 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; 1613 1614 if (update_dot_dot) { 1615 status = ocfs2_update_entry(old_inode, handle, 1616 &old_inode_dot_dot_res, new_dir); 1617 drop_nlink(old_dir); 1618 if (new_inode) { 1619 drop_nlink(new_inode); 1620 } else { 1621 inc_nlink(new_dir); 1622 mark_inode_dirty(new_dir); 1623 } 1624 } 1625 mark_inode_dirty(old_dir); 1626 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1627 if (new_inode) { 1628 mark_inode_dirty(new_inode); 1629 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1630 } 1631 1632 if (old_dir != new_dir) { 1633 /* Keep the same times on both directories.*/ 1634 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; 1635 1636 /* 1637 * This will also pick up the i_nlink change from the 1638 * block above. 1639 */ 1640 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1641 } 1642 1643 if (old_dir_nlink != old_dir->i_nlink) { 1644 if (!old_dir_bh) { 1645 mlog(ML_ERROR, "need to change nlink for old dir " 1646 "%llu from %d to %d but bh is NULL!\n", 1647 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1648 (int)old_dir_nlink, old_dir->i_nlink); 1649 } else { 1650 struct ocfs2_dinode *fe; 1651 status = ocfs2_journal_access_di(handle, 1652 INODE_CACHE(old_dir), 1653 old_dir_bh, 1654 OCFS2_JOURNAL_ACCESS_WRITE); 1655 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1656 ocfs2_set_links_count(fe, old_dir->i_nlink); 1657 ocfs2_journal_dirty(handle, old_dir_bh); 1658 } 1659 } 1660 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1661 status = 0; 1662 bail: 1663 if (handle) 1664 ocfs2_commit_trans(osb, handle); 1665 1666 if (orphan_dir) { 1667 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1668 ocfs2_inode_unlock(orphan_dir, 1); 1669 mutex_unlock(&orphan_dir->i_mutex); 1670 iput(orphan_dir); 1671 } 1672 1673 if (new_child_locked) 1674 ocfs2_inode_unlock(new_inode, 1); 1675 1676 if (old_child_locked) 1677 ocfs2_inode_unlock(old_inode, 1); 1678 1679 if (parents_locked) 1680 ocfs2_double_unlock(old_dir, new_dir); 1681 1682 if (rename_lock) 1683 ocfs2_rename_unlock(osb); 1684 1685 if (new_inode) 1686 sync_mapping_buffers(old_inode->i_mapping); 1687 1688 if (new_inode) 1689 iput(new_inode); 1690 1691 ocfs2_free_dir_lookup_result(&target_lookup_res); 1692 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1693 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1694 ocfs2_free_dir_lookup_result(&orphan_insert); 1695 ocfs2_free_dir_lookup_result(&target_insert); 1696 1697 brelse(newfe_bh); 1698 brelse(old_inode_bh); 1699 brelse(old_dir_bh); 1700 brelse(new_dir_bh); 1701 1702 if (status) 1703 mlog_errno(status); 1704 1705 return status; 1706 } 1707 1708 /* 1709 * we expect i_size = strlen(symname). Copy symname into the file 1710 * data, including the null terminator. 1711 */ 1712 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1713 handle_t *handle, 1714 struct inode *inode, 1715 const char *symname) 1716 { 1717 struct buffer_head **bhs = NULL; 1718 const char *c; 1719 struct super_block *sb = osb->sb; 1720 u64 p_blkno, p_blocks; 1721 int virtual, blocks, status, i, bytes_left; 1722 1723 bytes_left = i_size_read(inode) + 1; 1724 /* we can't trust i_blocks because we're actually going to 1725 * write i_size + 1 bytes. */ 1726 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1727 1728 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, 1729 i_size_read(inode), blocks); 1730 1731 /* Sanity check -- make sure we're going to fit. */ 1732 if (bytes_left > 1733 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1734 status = -EIO; 1735 mlog_errno(status); 1736 goto bail; 1737 } 1738 1739 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1740 if (!bhs) { 1741 status = -ENOMEM; 1742 mlog_errno(status); 1743 goto bail; 1744 } 1745 1746 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1747 NULL); 1748 if (status < 0) { 1749 mlog_errno(status); 1750 goto bail; 1751 } 1752 1753 /* links can never be larger than one cluster so we know this 1754 * is all going to be contiguous, but do a sanity check 1755 * anyway. */ 1756 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1757 status = -EIO; 1758 mlog_errno(status); 1759 goto bail; 1760 } 1761 1762 virtual = 0; 1763 while(bytes_left > 0) { 1764 c = &symname[virtual * sb->s_blocksize]; 1765 1766 bhs[virtual] = sb_getblk(sb, p_blkno); 1767 if (!bhs[virtual]) { 1768 status = -ENOMEM; 1769 mlog_errno(status); 1770 goto bail; 1771 } 1772 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1773 bhs[virtual]); 1774 1775 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1776 bhs[virtual], 1777 OCFS2_JOURNAL_ACCESS_CREATE); 1778 if (status < 0) { 1779 mlog_errno(status); 1780 goto bail; 1781 } 1782 1783 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1784 1785 memcpy(bhs[virtual]->b_data, c, 1786 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1787 bytes_left); 1788 1789 ocfs2_journal_dirty(handle, bhs[virtual]); 1790 1791 virtual++; 1792 p_blkno++; 1793 bytes_left -= sb->s_blocksize; 1794 } 1795 1796 status = 0; 1797 bail: 1798 1799 if (bhs) { 1800 for(i = 0; i < blocks; i++) 1801 brelse(bhs[i]); 1802 kfree(bhs); 1803 } 1804 1805 if (status) 1806 mlog_errno(status); 1807 return status; 1808 } 1809 1810 static int ocfs2_symlink(struct inode *dir, 1811 struct dentry *dentry, 1812 const char *symname) 1813 { 1814 int status, l, credits; 1815 u64 newsize; 1816 struct ocfs2_super *osb = NULL; 1817 struct inode *inode = NULL; 1818 struct super_block *sb; 1819 struct buffer_head *new_fe_bh = NULL; 1820 struct buffer_head *parent_fe_bh = NULL; 1821 struct ocfs2_dinode *fe = NULL; 1822 struct ocfs2_dinode *dirfe; 1823 handle_t *handle = NULL; 1824 struct ocfs2_alloc_context *inode_ac = NULL; 1825 struct ocfs2_alloc_context *data_ac = NULL; 1826 struct ocfs2_alloc_context *xattr_ac = NULL; 1827 int want_clusters = 0; 1828 int xattr_credits = 0; 1829 struct ocfs2_security_xattr_info si = { 1830 .enable = 1, 1831 }; 1832 int did_quota = 0, did_quota_inode = 0; 1833 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1834 sigset_t oldset; 1835 int did_block_signals = 0; 1836 struct ocfs2_dentry_lock *dl = NULL; 1837 1838 trace_ocfs2_symlink_begin(dir, dentry, symname, 1839 dentry->d_name.len, dentry->d_name.name); 1840 1841 status = dquot_initialize(dir); 1842 if (status) { 1843 mlog_errno(status); 1844 goto bail; 1845 } 1846 1847 sb = dir->i_sb; 1848 osb = OCFS2_SB(sb); 1849 1850 l = strlen(symname) + 1; 1851 1852 credits = ocfs2_calc_symlink_credits(sb); 1853 1854 /* lock the parent directory */ 1855 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1856 if (status < 0) { 1857 if (status != -ENOENT) 1858 mlog_errno(status); 1859 return status; 1860 } 1861 1862 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1863 if (!ocfs2_read_links_count(dirfe)) { 1864 /* can't make a file in a deleted directory. */ 1865 status = -ENOENT; 1866 goto bail; 1867 } 1868 1869 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1870 dentry->d_name.len); 1871 if (status) 1872 goto bail; 1873 1874 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1875 dentry->d_name.name, 1876 dentry->d_name.len, &lookup); 1877 if (status < 0) { 1878 mlog_errno(status); 1879 goto bail; 1880 } 1881 1882 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1883 if (status < 0) { 1884 if (status != -ENOSPC) 1885 mlog_errno(status); 1886 goto bail; 1887 } 1888 1889 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1890 if (IS_ERR(inode)) { 1891 status = PTR_ERR(inode); 1892 inode = NULL; 1893 mlog_errno(status); 1894 goto bail; 1895 } 1896 1897 /* get security xattr */ 1898 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1899 if (status) { 1900 if (status == -EOPNOTSUPP) 1901 si.enable = 0; 1902 else { 1903 mlog_errno(status); 1904 goto bail; 1905 } 1906 } 1907 1908 /* calculate meta data/clusters for setting security xattr */ 1909 if (si.enable) { 1910 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1911 &xattr_credits, &xattr_ac); 1912 if (status < 0) { 1913 mlog_errno(status); 1914 goto bail; 1915 } 1916 } 1917 1918 /* don't reserve bitmap space for fast symlinks. */ 1919 if (l > ocfs2_fast_symlink_chars(sb)) 1920 want_clusters += 1; 1921 1922 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1923 if (status < 0) { 1924 if (status != -ENOSPC) 1925 mlog_errno(status); 1926 goto bail; 1927 } 1928 1929 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1930 if (IS_ERR(handle)) { 1931 status = PTR_ERR(handle); 1932 handle = NULL; 1933 mlog_errno(status); 1934 goto bail; 1935 } 1936 1937 /* Starting to change things, restart is no longer possible. */ 1938 ocfs2_block_signals(&oldset); 1939 did_block_signals = 1; 1940 1941 status = dquot_alloc_inode(inode); 1942 if (status) 1943 goto bail; 1944 did_quota_inode = 1; 1945 1946 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1947 dentry->d_name.name, 1948 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1949 inode->i_mode); 1950 1951 status = ocfs2_mknod_locked(osb, dir, inode, 1952 0, &new_fe_bh, parent_fe_bh, handle, 1953 inode_ac); 1954 if (status < 0) { 1955 mlog_errno(status); 1956 goto bail; 1957 } 1958 1959 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1960 inode->i_rdev = 0; 1961 newsize = l - 1; 1962 inode->i_op = &ocfs2_symlink_inode_operations; 1963 if (l > ocfs2_fast_symlink_chars(sb)) { 1964 u32 offset = 0; 1965 1966 status = dquot_alloc_space_nodirty(inode, 1967 ocfs2_clusters_to_bytes(osb->sb, 1)); 1968 if (status) 1969 goto bail; 1970 did_quota = 1; 1971 inode->i_mapping->a_ops = &ocfs2_aops; 1972 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1973 new_fe_bh, 1974 handle, data_ac, NULL, 1975 NULL); 1976 if (status < 0) { 1977 if (status != -ENOSPC && status != -EINTR) { 1978 mlog(ML_ERROR, 1979 "Failed to extend file to %llu\n", 1980 (unsigned long long)newsize); 1981 mlog_errno(status); 1982 status = -ENOSPC; 1983 } 1984 goto bail; 1985 } 1986 i_size_write(inode, newsize); 1987 inode->i_blocks = ocfs2_inode_sector_count(inode); 1988 } else { 1989 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1990 memcpy((char *) fe->id2.i_symlink, symname, l); 1991 i_size_write(inode, newsize); 1992 inode->i_blocks = 0; 1993 } 1994 1995 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1996 if (status < 0) { 1997 mlog_errno(status); 1998 goto bail; 1999 } 2000 2001 if (!ocfs2_inode_is_fast_symlink(inode)) { 2002 status = ocfs2_create_symlink_data(osb, handle, inode, 2003 symname); 2004 if (status < 0) { 2005 mlog_errno(status); 2006 goto bail; 2007 } 2008 } 2009 2010 if (si.enable) { 2011 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 2012 xattr_ac, data_ac); 2013 if (status < 0) { 2014 mlog_errno(status); 2015 goto bail; 2016 } 2017 } 2018 2019 /* 2020 * Do this before adding the entry to the directory. We add 2021 * also set d_op after success so that ->d_iput() will cleanup 2022 * the dentry lock even if ocfs2_add_entry() fails below. 2023 */ 2024 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 2025 if (status) { 2026 mlog_errno(status); 2027 goto bail; 2028 } 2029 2030 dl = dentry->d_fsdata; 2031 2032 status = ocfs2_add_entry(handle, dentry, inode, 2033 le64_to_cpu(fe->i_blkno), parent_fe_bh, 2034 &lookup); 2035 if (status < 0) { 2036 mlog_errno(status); 2037 goto bail; 2038 } 2039 2040 insert_inode_hash(inode); 2041 d_instantiate(dentry, inode); 2042 bail: 2043 if (status < 0 && did_quota) 2044 dquot_free_space_nodirty(inode, 2045 ocfs2_clusters_to_bytes(osb->sb, 1)); 2046 if (status < 0 && did_quota_inode) 2047 dquot_free_inode(inode); 2048 if (handle) 2049 ocfs2_commit_trans(osb, handle); 2050 2051 ocfs2_inode_unlock(dir, 1); 2052 if (did_block_signals) 2053 ocfs2_unblock_signals(&oldset); 2054 2055 brelse(new_fe_bh); 2056 brelse(parent_fe_bh); 2057 kfree(si.value); 2058 ocfs2_free_dir_lookup_result(&lookup); 2059 if (inode_ac) 2060 ocfs2_free_alloc_context(inode_ac); 2061 if (data_ac) 2062 ocfs2_free_alloc_context(data_ac); 2063 if (xattr_ac) 2064 ocfs2_free_alloc_context(xattr_ac); 2065 if ((status < 0) && inode) { 2066 if (dl) 2067 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 2068 2069 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 2070 clear_nlink(inode); 2071 iput(inode); 2072 } 2073 2074 if (status) 2075 mlog_errno(status); 2076 2077 return status; 2078 } 2079 2080 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2081 { 2082 int status, namelen; 2083 2084 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2085 (long long)blkno); 2086 if (namelen <= 0) { 2087 if (namelen) 2088 status = namelen; 2089 else 2090 status = -EINVAL; 2091 mlog_errno(status); 2092 goto bail; 2093 } 2094 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2095 status = -EINVAL; 2096 mlog_errno(status); 2097 goto bail; 2098 } 2099 2100 trace_ocfs2_blkno_stringify(blkno, name, namelen); 2101 2102 status = 0; 2103 bail: 2104 if (status < 0) 2105 mlog_errno(status); 2106 return status; 2107 } 2108 2109 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, 2110 struct inode **ret_orphan_dir, 2111 struct buffer_head **ret_orphan_dir_bh) 2112 { 2113 struct inode *orphan_dir_inode; 2114 struct buffer_head *orphan_dir_bh = NULL; 2115 int ret = 0; 2116 2117 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2118 ORPHAN_DIR_SYSTEM_INODE, 2119 osb->slot_num); 2120 if (!orphan_dir_inode) { 2121 ret = -ENOENT; 2122 mlog_errno(ret); 2123 return ret; 2124 } 2125 2126 mutex_lock(&orphan_dir_inode->i_mutex); 2127 2128 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2129 if (ret < 0) { 2130 mutex_unlock(&orphan_dir_inode->i_mutex); 2131 iput(orphan_dir_inode); 2132 2133 mlog_errno(ret); 2134 return ret; 2135 } 2136 2137 *ret_orphan_dir = orphan_dir_inode; 2138 *ret_orphan_dir_bh = orphan_dir_bh; 2139 2140 return 0; 2141 } 2142 2143 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, 2144 struct buffer_head *orphan_dir_bh, 2145 u64 blkno, 2146 char *name, 2147 struct ocfs2_dir_lookup_result *lookup, 2148 bool dio) 2149 { 2150 int ret; 2151 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); 2152 int namelen = dio ? 2153 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2154 OCFS2_ORPHAN_NAMELEN; 2155 2156 if (dio) { 2157 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2158 OCFS2_DIO_ORPHAN_PREFIX); 2159 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2160 ret = -EINVAL; 2161 mlog_errno(ret); 2162 return ret; 2163 } 2164 2165 ret = ocfs2_blkno_stringify(blkno, 2166 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2167 } else 2168 ret = ocfs2_blkno_stringify(blkno, name); 2169 if (ret < 0) { 2170 mlog_errno(ret); 2171 return ret; 2172 } 2173 2174 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2175 orphan_dir_bh, name, 2176 namelen, lookup); 2177 if (ret < 0) { 2178 mlog_errno(ret); 2179 return ret; 2180 } 2181 2182 return 0; 2183 } 2184 2185 /** 2186 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for 2187 * insertion of an orphan. 2188 * @osb: ocfs2 file system 2189 * @ret_orphan_dir: Orphan dir inode - returned locked! 2190 * @blkno: Actual block number of the inode to be inserted into orphan dir. 2191 * @lookup: dir lookup result, to be passed back into functions like 2192 * ocfs2_orphan_add 2193 * 2194 * Returns zero on success and the ret_orphan_dir, name and lookup 2195 * fields will be populated. 2196 * 2197 * Returns non-zero on failure. 2198 */ 2199 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2200 struct inode **ret_orphan_dir, 2201 u64 blkno, 2202 char *name, 2203 struct ocfs2_dir_lookup_result *lookup, 2204 bool dio) 2205 { 2206 struct inode *orphan_dir_inode = NULL; 2207 struct buffer_head *orphan_dir_bh = NULL; 2208 int ret = 0; 2209 2210 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, 2211 &orphan_dir_bh); 2212 if (ret < 0) { 2213 mlog_errno(ret); 2214 return ret; 2215 } 2216 2217 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, 2218 blkno, name, lookup, dio); 2219 if (ret < 0) { 2220 mlog_errno(ret); 2221 goto out; 2222 } 2223 2224 *ret_orphan_dir = orphan_dir_inode; 2225 2226 out: 2227 brelse(orphan_dir_bh); 2228 2229 if (ret) { 2230 ocfs2_inode_unlock(orphan_dir_inode, 1); 2231 mutex_unlock(&orphan_dir_inode->i_mutex); 2232 iput(orphan_dir_inode); 2233 } 2234 2235 if (ret) 2236 mlog_errno(ret); 2237 return ret; 2238 } 2239 2240 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2241 handle_t *handle, 2242 struct inode *inode, 2243 struct buffer_head *fe_bh, 2244 char *name, 2245 struct ocfs2_dir_lookup_result *lookup, 2246 struct inode *orphan_dir_inode, 2247 bool dio) 2248 { 2249 struct buffer_head *orphan_dir_bh = NULL; 2250 int status = 0; 2251 struct ocfs2_dinode *orphan_fe; 2252 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 2253 int namelen = dio ? 2254 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2255 OCFS2_ORPHAN_NAMELEN; 2256 2257 trace_ocfs2_orphan_add_begin( 2258 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2259 2260 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 2261 if (status < 0) { 2262 mlog_errno(status); 2263 goto leave; 2264 } 2265 2266 status = ocfs2_journal_access_di(handle, 2267 INODE_CACHE(orphan_dir_inode), 2268 orphan_dir_bh, 2269 OCFS2_JOURNAL_ACCESS_WRITE); 2270 if (status < 0) { 2271 mlog_errno(status); 2272 goto leave; 2273 } 2274 2275 /* 2276 * We're going to journal the change of i_flags and i_orphaned_slot. 2277 * It's safe anyway, though some callers may duplicate the journaling. 2278 * Journaling within the func just make the logic look more 2279 * straightforward. 2280 */ 2281 status = ocfs2_journal_access_di(handle, 2282 INODE_CACHE(inode), 2283 fe_bh, 2284 OCFS2_JOURNAL_ACCESS_WRITE); 2285 if (status < 0) { 2286 mlog_errno(status); 2287 goto leave; 2288 } 2289 2290 /* we're a cluster, and nlink can change on disk from 2291 * underneath us... */ 2292 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2293 if (S_ISDIR(inode->i_mode)) 2294 ocfs2_add_links_count(orphan_fe, 1); 2295 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2296 ocfs2_journal_dirty(handle, orphan_dir_bh); 2297 2298 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2299 namelen, inode, 2300 OCFS2_I(inode)->ip_blkno, 2301 orphan_dir_bh, lookup); 2302 if (status < 0) { 2303 mlog_errno(status); 2304 goto rollback; 2305 } 2306 2307 if (dio) { 2308 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan 2309 * slot. 2310 */ 2311 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2312 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); 2313 } else { 2314 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL); 2315 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; 2316 2317 /* Record which orphan dir our inode now resides 2318 * in. delete_inode will use this to determine which orphan 2319 * dir to lock. */ 2320 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2321 } 2322 2323 ocfs2_journal_dirty(handle, fe_bh); 2324 2325 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, 2326 osb->slot_num); 2327 2328 rollback: 2329 if (status < 0) { 2330 if (S_ISDIR(inode->i_mode)) 2331 ocfs2_add_links_count(orphan_fe, -1); 2332 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2333 } 2334 2335 leave: 2336 brelse(orphan_dir_bh); 2337 2338 return status; 2339 } 2340 2341 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2342 int ocfs2_orphan_del(struct ocfs2_super *osb, 2343 handle_t *handle, 2344 struct inode *orphan_dir_inode, 2345 struct inode *inode, 2346 struct buffer_head *orphan_dir_bh, 2347 bool dio) 2348 { 2349 const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN; 2350 char name[namelen + 1]; 2351 struct ocfs2_dinode *orphan_fe; 2352 int status = 0; 2353 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2354 2355 if (dio) { 2356 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2357 OCFS2_DIO_ORPHAN_PREFIX); 2358 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2359 status = -EINVAL; 2360 mlog_errno(status); 2361 return status; 2362 } 2363 2364 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, 2365 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2366 } else 2367 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2368 if (status < 0) { 2369 mlog_errno(status); 2370 goto leave; 2371 } 2372 2373 trace_ocfs2_orphan_del( 2374 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2375 name, strlen(name)); 2376 2377 /* find it's spot in the orphan directory */ 2378 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode, 2379 &lookup); 2380 if (status) { 2381 mlog_errno(status); 2382 goto leave; 2383 } 2384 2385 /* remove it from the orphan directory */ 2386 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); 2387 if (status < 0) { 2388 mlog_errno(status); 2389 goto leave; 2390 } 2391 2392 status = ocfs2_journal_access_di(handle, 2393 INODE_CACHE(orphan_dir_inode), 2394 orphan_dir_bh, 2395 OCFS2_JOURNAL_ACCESS_WRITE); 2396 if (status < 0) { 2397 mlog_errno(status); 2398 goto leave; 2399 } 2400 2401 /* do the i_nlink dance! :) */ 2402 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2403 if (S_ISDIR(inode->i_mode)) 2404 ocfs2_add_links_count(orphan_fe, -1); 2405 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2406 ocfs2_journal_dirty(handle, orphan_dir_bh); 2407 2408 leave: 2409 ocfs2_free_dir_lookup_result(&lookup); 2410 2411 if (status) 2412 mlog_errno(status); 2413 return status; 2414 } 2415 2416 /** 2417 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly 2418 * allocated file. This is different from the typical 'add to orphan dir' 2419 * operation in that the inode does not yet exist. This is a problem because 2420 * the orphan dir stringifies the inode block number to come up with it's 2421 * dirent. Obviously if the inode does not yet exist we have a chicken and egg 2422 * problem. This function works around it by calling deeper into the orphan 2423 * and suballoc code than other callers. Use this only by necessity. 2424 * @dir: The directory which this inode will ultimately wind up under - not the 2425 * orphan dir! 2426 * @dir_bh: buffer_head the @dir inode block 2427 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled 2428 * with the string to be used for orphan dirent. Pass back to the orphan dir 2429 * code. 2430 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan 2431 * dir code. 2432 * @ret_di_blkno: block number where the new inode will be allocated. 2433 * @orphan_insert: Dir insert context to be passed back into orphan dir code. 2434 * @ret_inode_ac: Inode alloc context to be passed back to the allocator. 2435 * 2436 * Returns zero on success and the ret_orphan_dir, name and lookup 2437 * fields will be populated. 2438 * 2439 * Returns non-zero on failure. 2440 */ 2441 static int ocfs2_prep_new_orphaned_file(struct inode *dir, 2442 struct buffer_head *dir_bh, 2443 char *orphan_name, 2444 struct inode **ret_orphan_dir, 2445 u64 *ret_di_blkno, 2446 struct ocfs2_dir_lookup_result *orphan_insert, 2447 struct ocfs2_alloc_context **ret_inode_ac) 2448 { 2449 int ret; 2450 u64 di_blkno; 2451 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2452 struct inode *orphan_dir = NULL; 2453 struct buffer_head *orphan_dir_bh = NULL; 2454 struct ocfs2_alloc_context *inode_ac = NULL; 2455 2456 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); 2457 if (ret < 0) { 2458 mlog_errno(ret); 2459 return ret; 2460 } 2461 2462 /* reserve an inode spot */ 2463 ret = ocfs2_reserve_new_inode(osb, &inode_ac); 2464 if (ret < 0) { 2465 if (ret != -ENOSPC) 2466 mlog_errno(ret); 2467 goto out; 2468 } 2469 2470 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, 2471 &di_blkno); 2472 if (ret) { 2473 mlog_errno(ret); 2474 goto out; 2475 } 2476 2477 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, 2478 di_blkno, orphan_name, orphan_insert, 2479 false); 2480 if (ret < 0) { 2481 mlog_errno(ret); 2482 goto out; 2483 } 2484 2485 out: 2486 if (ret == 0) { 2487 *ret_orphan_dir = orphan_dir; 2488 *ret_di_blkno = di_blkno; 2489 *ret_inode_ac = inode_ac; 2490 /* 2491 * orphan_name and orphan_insert are already up to 2492 * date via prepare_orphan_dir 2493 */ 2494 } else { 2495 /* Unroll reserve_new_inode* */ 2496 if (inode_ac) 2497 ocfs2_free_alloc_context(inode_ac); 2498 2499 /* Unroll orphan dir locking */ 2500 mutex_unlock(&orphan_dir->i_mutex); 2501 ocfs2_inode_unlock(orphan_dir, 1); 2502 iput(orphan_dir); 2503 } 2504 2505 brelse(orphan_dir_bh); 2506 2507 return ret; 2508 } 2509 2510 int ocfs2_create_inode_in_orphan(struct inode *dir, 2511 int mode, 2512 struct inode **new_inode) 2513 { 2514 int status, did_quota_inode = 0; 2515 struct inode *inode = NULL; 2516 struct inode *orphan_dir = NULL; 2517 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2518 struct ocfs2_dinode *di = NULL; 2519 handle_t *handle = NULL; 2520 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2521 struct buffer_head *parent_di_bh = NULL; 2522 struct buffer_head *new_di_bh = NULL; 2523 struct ocfs2_alloc_context *inode_ac = NULL; 2524 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2525 u64 uninitialized_var(di_blkno), suballoc_loc; 2526 u16 suballoc_bit; 2527 2528 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2529 if (status < 0) { 2530 if (status != -ENOENT) 2531 mlog_errno(status); 2532 return status; 2533 } 2534 2535 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, 2536 orphan_name, &orphan_dir, 2537 &di_blkno, &orphan_insert, &inode_ac); 2538 if (status < 0) { 2539 if (status != -ENOSPC) 2540 mlog_errno(status); 2541 goto leave; 2542 } 2543 2544 inode = ocfs2_get_init_inode(dir, mode); 2545 if (IS_ERR(inode)) { 2546 status = PTR_ERR(inode); 2547 inode = NULL; 2548 mlog_errno(status); 2549 goto leave; 2550 } 2551 2552 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2553 if (IS_ERR(handle)) { 2554 status = PTR_ERR(handle); 2555 handle = NULL; 2556 mlog_errno(status); 2557 goto leave; 2558 } 2559 2560 status = dquot_alloc_inode(inode); 2561 if (status) 2562 goto leave; 2563 did_quota_inode = 1; 2564 2565 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, 2566 &suballoc_loc, 2567 &suballoc_bit, di_blkno); 2568 if (status < 0) { 2569 mlog_errno(status); 2570 goto leave; 2571 } 2572 2573 clear_nlink(inode); 2574 /* do the real work now. */ 2575 status = __ocfs2_mknod_locked(dir, inode, 2576 0, &new_di_bh, parent_di_bh, handle, 2577 inode_ac, di_blkno, suballoc_loc, 2578 suballoc_bit); 2579 if (status < 0) { 2580 mlog_errno(status); 2581 goto leave; 2582 } 2583 2584 di = (struct ocfs2_dinode *)new_di_bh->b_data; 2585 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, 2586 &orphan_insert, orphan_dir, false); 2587 if (status < 0) { 2588 mlog_errno(status); 2589 goto leave; 2590 } 2591 2592 /* get open lock so that only nodes can't remove it from orphan dir. */ 2593 status = ocfs2_open_lock(inode); 2594 if (status < 0) 2595 mlog_errno(status); 2596 2597 insert_inode_hash(inode); 2598 leave: 2599 if (status < 0 && did_quota_inode) 2600 dquot_free_inode(inode); 2601 if (handle) 2602 ocfs2_commit_trans(osb, handle); 2603 2604 if (orphan_dir) { 2605 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2606 ocfs2_inode_unlock(orphan_dir, 1); 2607 mutex_unlock(&orphan_dir->i_mutex); 2608 iput(orphan_dir); 2609 } 2610 2611 if ((status < 0) && inode) { 2612 clear_nlink(inode); 2613 iput(inode); 2614 } 2615 2616 if (inode_ac) 2617 ocfs2_free_alloc_context(inode_ac); 2618 2619 brelse(new_di_bh); 2620 2621 if (!status) 2622 *new_inode = inode; 2623 2624 ocfs2_free_dir_lookup_result(&orphan_insert); 2625 2626 ocfs2_inode_unlock(dir, 1); 2627 brelse(parent_di_bh); 2628 return status; 2629 } 2630 2631 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, 2632 struct inode *inode) 2633 { 2634 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2635 struct inode *orphan_dir_inode = NULL; 2636 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2637 struct buffer_head *di_bh = NULL; 2638 int status = 0; 2639 handle_t *handle = NULL; 2640 struct ocfs2_dinode *di = NULL; 2641 2642 status = ocfs2_inode_lock(inode, &di_bh, 1); 2643 if (status < 0) { 2644 mlog_errno(status); 2645 goto bail; 2646 } 2647 2648 di = (struct ocfs2_dinode *) di_bh->b_data; 2649 /* 2650 * Another append dio crashed? 2651 * If so, manually recover it first. 2652 */ 2653 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 2654 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode)); 2655 if (status < 0) { 2656 if (status != -ENOSPC) 2657 mlog_errno(status); 2658 goto bail_unlock_inode; 2659 } 2660 2661 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0); 2662 if (status < 0) { 2663 mlog_errno(status); 2664 goto bail_unlock_inode; 2665 } 2666 } 2667 2668 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, 2669 OCFS2_I(inode)->ip_blkno, 2670 orphan_name, 2671 &orphan_insert, 2672 true); 2673 if (status < 0) { 2674 mlog_errno(status); 2675 goto bail_unlock_inode; 2676 } 2677 2678 handle = ocfs2_start_trans(osb, 2679 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); 2680 if (IS_ERR(handle)) { 2681 status = PTR_ERR(handle); 2682 goto bail_unlock_orphan; 2683 } 2684 2685 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, 2686 &orphan_insert, orphan_dir_inode, true); 2687 if (status) 2688 mlog_errno(status); 2689 2690 ocfs2_commit_trans(osb, handle); 2691 2692 bail_unlock_orphan: 2693 ocfs2_inode_unlock(orphan_dir_inode, 1); 2694 mutex_unlock(&orphan_dir_inode->i_mutex); 2695 iput(orphan_dir_inode); 2696 2697 ocfs2_free_dir_lookup_result(&orphan_insert); 2698 2699 bail_unlock_inode: 2700 ocfs2_inode_unlock(inode, 1); 2701 brelse(di_bh); 2702 2703 bail: 2704 return status; 2705 } 2706 2707 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, 2708 struct inode *inode, struct buffer_head *di_bh, 2709 int update_isize, loff_t end) 2710 { 2711 struct inode *orphan_dir_inode = NULL; 2712 struct buffer_head *orphan_dir_bh = NULL; 2713 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2714 handle_t *handle = NULL; 2715 int status = 0; 2716 2717 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2718 ORPHAN_DIR_SYSTEM_INODE, 2719 le16_to_cpu(di->i_dio_orphaned_slot)); 2720 if (!orphan_dir_inode) { 2721 status = -ENOENT; 2722 mlog_errno(status); 2723 goto bail; 2724 } 2725 2726 mutex_lock(&orphan_dir_inode->i_mutex); 2727 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2728 if (status < 0) { 2729 mutex_unlock(&orphan_dir_inode->i_mutex); 2730 iput(orphan_dir_inode); 2731 mlog_errno(status); 2732 goto bail; 2733 } 2734 2735 handle = ocfs2_start_trans(osb, 2736 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); 2737 if (IS_ERR(handle)) { 2738 status = PTR_ERR(handle); 2739 goto bail_unlock_orphan; 2740 } 2741 2742 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); 2743 2744 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, 2745 inode, orphan_dir_bh, true); 2746 if (status < 0) { 2747 mlog_errno(status); 2748 goto bail_commit; 2749 } 2750 2751 status = ocfs2_journal_access_di(handle, 2752 INODE_CACHE(inode), 2753 di_bh, 2754 OCFS2_JOURNAL_ACCESS_WRITE); 2755 if (status < 0) { 2756 mlog_errno(status); 2757 goto bail_commit; 2758 } 2759 2760 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2761 di->i_dio_orphaned_slot = 0; 2762 2763 if (update_isize) { 2764 status = ocfs2_set_inode_size(handle, inode, di_bh, end); 2765 if (status) 2766 mlog_errno(status); 2767 } else 2768 ocfs2_journal_dirty(handle, di_bh); 2769 2770 bail_commit: 2771 ocfs2_commit_trans(osb, handle); 2772 2773 bail_unlock_orphan: 2774 ocfs2_inode_unlock(orphan_dir_inode, 1); 2775 mutex_unlock(&orphan_dir_inode->i_mutex); 2776 brelse(orphan_dir_bh); 2777 iput(orphan_dir_inode); 2778 2779 bail: 2780 return status; 2781 } 2782 2783 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2784 struct inode *inode, 2785 struct dentry *dentry) 2786 { 2787 int status = 0; 2788 struct buffer_head *parent_di_bh = NULL; 2789 handle_t *handle = NULL; 2790 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2791 struct ocfs2_dinode *dir_di, *di; 2792 struct inode *orphan_dir_inode = NULL; 2793 struct buffer_head *orphan_dir_bh = NULL; 2794 struct buffer_head *di_bh = NULL; 2795 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2796 2797 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, 2798 dentry->d_name.len, dentry->d_name.name, 2799 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2800 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2801 2802 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2803 if (status < 0) { 2804 if (status != -ENOENT) 2805 mlog_errno(status); 2806 return status; 2807 } 2808 2809 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2810 if (!dir_di->i_links_count) { 2811 /* can't make a file in a deleted directory. */ 2812 status = -ENOENT; 2813 goto leave; 2814 } 2815 2816 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2817 dentry->d_name.len); 2818 if (status) 2819 goto leave; 2820 2821 /* get a spot inside the dir. */ 2822 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2823 dentry->d_name.name, 2824 dentry->d_name.len, &lookup); 2825 if (status < 0) { 2826 mlog_errno(status); 2827 goto leave; 2828 } 2829 2830 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2831 ORPHAN_DIR_SYSTEM_INODE, 2832 osb->slot_num); 2833 if (!orphan_dir_inode) { 2834 status = -ENOENT; 2835 mlog_errno(status); 2836 goto leave; 2837 } 2838 2839 mutex_lock(&orphan_dir_inode->i_mutex); 2840 2841 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2842 if (status < 0) { 2843 mlog_errno(status); 2844 mutex_unlock(&orphan_dir_inode->i_mutex); 2845 iput(orphan_dir_inode); 2846 goto leave; 2847 } 2848 2849 status = ocfs2_read_inode_block(inode, &di_bh); 2850 if (status < 0) { 2851 mlog_errno(status); 2852 goto orphan_unlock; 2853 } 2854 2855 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2856 if (IS_ERR(handle)) { 2857 status = PTR_ERR(handle); 2858 handle = NULL; 2859 mlog_errno(status); 2860 goto orphan_unlock; 2861 } 2862 2863 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2864 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2865 if (status < 0) { 2866 mlog_errno(status); 2867 goto out_commit; 2868 } 2869 2870 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2871 orphan_dir_bh, false); 2872 if (status < 0) { 2873 mlog_errno(status); 2874 goto out_commit; 2875 } 2876 2877 di = (struct ocfs2_dinode *)di_bh->b_data; 2878 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); 2879 di->i_orphaned_slot = 0; 2880 set_nlink(inode, 1); 2881 ocfs2_set_links_count(di, inode->i_nlink); 2882 ocfs2_update_inode_fsync_trans(handle, inode, 1); 2883 ocfs2_journal_dirty(handle, di_bh); 2884 2885 status = ocfs2_add_entry(handle, dentry, inode, 2886 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2887 &lookup); 2888 if (status < 0) { 2889 mlog_errno(status); 2890 goto out_commit; 2891 } 2892 2893 status = ocfs2_dentry_attach_lock(dentry, inode, 2894 OCFS2_I(dir)->ip_blkno); 2895 if (status) { 2896 mlog_errno(status); 2897 goto out_commit; 2898 } 2899 2900 d_instantiate(dentry, inode); 2901 status = 0; 2902 out_commit: 2903 ocfs2_commit_trans(osb, handle); 2904 orphan_unlock: 2905 ocfs2_inode_unlock(orphan_dir_inode, 1); 2906 mutex_unlock(&orphan_dir_inode->i_mutex); 2907 iput(orphan_dir_inode); 2908 leave: 2909 2910 ocfs2_inode_unlock(dir, 1); 2911 2912 brelse(di_bh); 2913 brelse(parent_di_bh); 2914 brelse(orphan_dir_bh); 2915 2916 ocfs2_free_dir_lookup_result(&lookup); 2917 2918 if (status) 2919 mlog_errno(status); 2920 2921 return status; 2922 } 2923 2924 const struct inode_operations ocfs2_dir_iops = { 2925 .create = ocfs2_create, 2926 .lookup = ocfs2_lookup, 2927 .link = ocfs2_link, 2928 .unlink = ocfs2_unlink, 2929 .rmdir = ocfs2_unlink, 2930 .symlink = ocfs2_symlink, 2931 .mkdir = ocfs2_mkdir, 2932 .mknod = ocfs2_mknod, 2933 .rename = ocfs2_rename, 2934 .setattr = ocfs2_setattr, 2935 .getattr = ocfs2_getattr, 2936 .permission = ocfs2_permission, 2937 .setxattr = generic_setxattr, 2938 .getxattr = generic_getxattr, 2939 .listxattr = ocfs2_listxattr, 2940 .removexattr = generic_removexattr, 2941 .fiemap = ocfs2_fiemap, 2942 .get_acl = ocfs2_iop_get_acl, 2943 .set_acl = ocfs2_iop_set_acl, 2944 }; 2945