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; 203 204 inode = new_inode(dir->i_sb); 205 if (!inode) { 206 mlog(ML_ERROR, "new_inode failed!\n"); 207 return NULL; 208 } 209 210 /* populate as many fields early on as possible - many of 211 * these are used by the support functions here and in 212 * callers. */ 213 if (S_ISDIR(mode)) 214 set_nlink(inode, 2); 215 inode_init_owner(inode, dir, mode); 216 dquot_initialize(inode); 217 return inode; 218 } 219 220 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb, 221 struct dentry *dentry, struct inode *inode) 222 { 223 struct ocfs2_dentry_lock *dl = dentry->d_fsdata; 224 225 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres); 226 ocfs2_lock_res_free(&dl->dl_lockres); 227 BUG_ON(dl->dl_count != 1); 228 spin_lock(&dentry_attach_lock); 229 dentry->d_fsdata = NULL; 230 spin_unlock(&dentry_attach_lock); 231 kfree(dl); 232 iput(inode); 233 } 234 235 static int ocfs2_mknod(struct inode *dir, 236 struct dentry *dentry, 237 umode_t mode, 238 dev_t dev) 239 { 240 int status = 0; 241 struct buffer_head *parent_fe_bh = NULL; 242 handle_t *handle = NULL; 243 struct ocfs2_super *osb; 244 struct ocfs2_dinode *dirfe; 245 struct buffer_head *new_fe_bh = NULL; 246 struct inode *inode = NULL; 247 struct ocfs2_alloc_context *inode_ac = NULL; 248 struct ocfs2_alloc_context *data_ac = NULL; 249 struct ocfs2_alloc_context *meta_ac = NULL; 250 int want_clusters = 0; 251 int want_meta = 0; 252 int xattr_credits = 0; 253 struct ocfs2_security_xattr_info si = { 254 .enable = 1, 255 }; 256 int did_quota_inode = 0; 257 struct ocfs2_dir_lookup_result lookup = { NULL, }; 258 sigset_t oldset; 259 int did_block_signals = 0; 260 struct posix_acl *default_acl = NULL, *acl = NULL; 261 struct ocfs2_dentry_lock *dl = NULL; 262 263 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name, 264 (unsigned long long)OCFS2_I(dir)->ip_blkno, 265 (unsigned long)dev, mode); 266 267 dquot_initialize(dir); 268 269 /* get our super block */ 270 osb = OCFS2_SB(dir->i_sb); 271 272 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 273 if (status < 0) { 274 if (status != -ENOENT) 275 mlog_errno(status); 276 return status; 277 } 278 279 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) { 280 status = -EMLINK; 281 goto leave; 282 } 283 284 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 285 if (!ocfs2_read_links_count(dirfe)) { 286 /* can't make a file in a deleted directory. */ 287 status = -ENOENT; 288 goto leave; 289 } 290 291 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 292 dentry->d_name.len); 293 if (status) 294 goto leave; 295 296 /* get a spot inside the dir. */ 297 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 298 dentry->d_name.name, 299 dentry->d_name.len, &lookup); 300 if (status < 0) { 301 mlog_errno(status); 302 goto leave; 303 } 304 305 /* reserve an inode spot */ 306 status = ocfs2_reserve_new_inode(osb, &inode_ac); 307 if (status < 0) { 308 if (status != -ENOSPC) 309 mlog_errno(status); 310 goto leave; 311 } 312 313 inode = ocfs2_get_init_inode(dir, mode); 314 if (!inode) { 315 status = -ENOMEM; 316 mlog_errno(status); 317 goto leave; 318 } 319 320 /* get security xattr */ 321 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 322 if (status) { 323 if (status == -EOPNOTSUPP) 324 si.enable = 0; 325 else { 326 mlog_errno(status); 327 goto leave; 328 } 329 } 330 331 /* calculate meta data/clusters for setting security and acl xattr */ 332 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode, 333 &si, &want_clusters, 334 &xattr_credits, &want_meta); 335 if (status < 0) { 336 mlog_errno(status); 337 goto leave; 338 } 339 340 /* Reserve a cluster if creating an extent based directory. */ 341 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { 342 want_clusters += 1; 343 344 /* Dir indexing requires extra space as well */ 345 if (ocfs2_supports_indexed_dirs(osb)) 346 want_meta++; 347 } 348 349 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac); 350 if (status < 0) { 351 if (status != -ENOSPC) 352 mlog_errno(status); 353 goto leave; 354 } 355 356 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 357 if (status < 0) { 358 if (status != -ENOSPC) 359 mlog_errno(status); 360 goto leave; 361 } 362 363 status = posix_acl_create(dir, &mode, &default_acl, &acl); 364 if (status) { 365 mlog_errno(status); 366 goto leave; 367 } 368 369 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 370 S_ISDIR(mode), 371 xattr_credits)); 372 if (IS_ERR(handle)) { 373 status = PTR_ERR(handle); 374 handle = NULL; 375 mlog_errno(status); 376 goto leave; 377 } 378 379 /* Starting to change things, restart is no longer possible. */ 380 ocfs2_block_signals(&oldset); 381 did_block_signals = 1; 382 383 status = dquot_alloc_inode(inode); 384 if (status) 385 goto leave; 386 did_quota_inode = 1; 387 388 /* do the real work now. */ 389 status = ocfs2_mknod_locked(osb, dir, inode, dev, 390 &new_fe_bh, parent_fe_bh, handle, 391 inode_ac); 392 if (status < 0) { 393 mlog_errno(status); 394 goto leave; 395 } 396 397 if (S_ISDIR(mode)) { 398 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 399 new_fe_bh, data_ac, meta_ac); 400 if (status < 0) { 401 mlog_errno(status); 402 goto leave; 403 } 404 405 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir), 406 parent_fe_bh, 407 OCFS2_JOURNAL_ACCESS_WRITE); 408 if (status < 0) { 409 mlog_errno(status); 410 goto leave; 411 } 412 ocfs2_add_links_count(dirfe, 1); 413 ocfs2_journal_dirty(handle, parent_fe_bh); 414 inc_nlink(dir); 415 } 416 417 if (default_acl) { 418 status = ocfs2_set_acl(handle, inode, new_fe_bh, 419 ACL_TYPE_DEFAULT, default_acl, 420 meta_ac, data_ac); 421 } 422 if (!status && acl) { 423 status = ocfs2_set_acl(handle, inode, new_fe_bh, 424 ACL_TYPE_ACCESS, acl, 425 meta_ac, data_ac); 426 } 427 428 if (status < 0) { 429 mlog_errno(status); 430 goto leave; 431 } 432 433 if (si.enable) { 434 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 435 meta_ac, data_ac); 436 if (status < 0) { 437 mlog_errno(status); 438 goto leave; 439 } 440 } 441 442 /* 443 * Do this before adding the entry to the directory. We add 444 * also set d_op after success so that ->d_iput() will cleanup 445 * the dentry lock even if ocfs2_add_entry() fails below. 446 */ 447 status = ocfs2_dentry_attach_lock(dentry, inode, 448 OCFS2_I(dir)->ip_blkno); 449 if (status) { 450 mlog_errno(status); 451 goto leave; 452 } 453 454 dl = dentry->d_fsdata; 455 456 status = ocfs2_add_entry(handle, dentry, inode, 457 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 458 &lookup); 459 if (status < 0) { 460 mlog_errno(status); 461 goto leave; 462 } 463 464 insert_inode_hash(inode); 465 d_instantiate(dentry, inode); 466 status = 0; 467 leave: 468 if (default_acl) 469 posix_acl_release(default_acl); 470 if (acl) 471 posix_acl_release(acl); 472 if (status < 0 && did_quota_inode) 473 dquot_free_inode(inode); 474 if (handle) 475 ocfs2_commit_trans(osb, handle); 476 477 ocfs2_inode_unlock(dir, 1); 478 if (did_block_signals) 479 ocfs2_unblock_signals(&oldset); 480 481 brelse(new_fe_bh); 482 brelse(parent_fe_bh); 483 kfree(si.value); 484 485 ocfs2_free_dir_lookup_result(&lookup); 486 487 if (inode_ac) 488 ocfs2_free_alloc_context(inode_ac); 489 490 if (data_ac) 491 ocfs2_free_alloc_context(data_ac); 492 493 if (meta_ac) 494 ocfs2_free_alloc_context(meta_ac); 495 496 /* 497 * We should call iput after the i_mutex of the bitmap been 498 * unlocked in ocfs2_free_alloc_context, or the 499 * ocfs2_delete_inode will mutex_lock again. 500 */ 501 if ((status < 0) && inode) { 502 if (dl) 503 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 504 505 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 506 clear_nlink(inode); 507 iput(inode); 508 } 509 510 if (status) 511 mlog_errno(status); 512 513 return status; 514 } 515 516 static int __ocfs2_mknod_locked(struct inode *dir, 517 struct inode *inode, 518 dev_t dev, 519 struct buffer_head **new_fe_bh, 520 struct buffer_head *parent_fe_bh, 521 handle_t *handle, 522 struct ocfs2_alloc_context *inode_ac, 523 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit) 524 { 525 int status = 0; 526 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 527 struct ocfs2_dinode *fe = NULL; 528 struct ocfs2_extent_list *fel; 529 u16 feat; 530 struct ocfs2_inode_info *oi = OCFS2_I(inode); 531 532 *new_fe_bh = NULL; 533 534 /* populate as many fields early on as possible - many of 535 * these are used by the support functions here and in 536 * callers. */ 537 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 538 OCFS2_I(inode)->ip_blkno = fe_blkno; 539 spin_lock(&osb->osb_lock); 540 inode->i_generation = osb->s_next_generation++; 541 spin_unlock(&osb->osb_lock); 542 543 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 544 if (!*new_fe_bh) { 545 status = -ENOMEM; 546 mlog_errno(status); 547 goto leave; 548 } 549 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh); 550 551 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 552 *new_fe_bh, 553 OCFS2_JOURNAL_ACCESS_CREATE); 554 if (status < 0) { 555 mlog_errno(status); 556 goto leave; 557 } 558 559 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 560 memset(fe, 0, osb->sb->s_blocksize); 561 562 fe->i_generation = cpu_to_le32(inode->i_generation); 563 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 564 fe->i_blkno = cpu_to_le64(fe_blkno); 565 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc); 566 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 567 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); 568 fe->i_uid = cpu_to_le32(i_uid_read(inode)); 569 fe->i_gid = cpu_to_le32(i_gid_read(inode)); 570 fe->i_mode = cpu_to_le16(inode->i_mode); 571 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 572 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 573 574 ocfs2_set_links_count(fe, inode->i_nlink); 575 576 fe->i_last_eb_blk = 0; 577 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 578 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL); 579 fe->i_atime = fe->i_ctime = fe->i_mtime = 580 cpu_to_le64(CURRENT_TIME.tv_sec); 581 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 582 cpu_to_le32(CURRENT_TIME.tv_nsec); 583 fe->i_dtime = 0; 584 585 /* 586 * If supported, directories start with inline data. If inline 587 * isn't supported, but indexing is, we start them as indexed. 588 */ 589 feat = le16_to_cpu(fe->i_dyn_features); 590 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) { 591 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); 592 593 fe->id2.i_data.id_count = cpu_to_le16( 594 ocfs2_max_inline_data_with_xattr(osb->sb, fe)); 595 } else { 596 fel = &fe->id2.i_list; 597 fel->l_tree_depth = 0; 598 fel->l_next_free_rec = 0; 599 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 600 } 601 602 ocfs2_journal_dirty(handle, *new_fe_bh); 603 604 ocfs2_populate_inode(inode, fe, 1); 605 ocfs2_ci_set_new(osb, INODE_CACHE(inode)); 606 if (!ocfs2_mount_local(osb)) { 607 status = ocfs2_create_new_inode_locks(inode); 608 if (status < 0) 609 mlog_errno(status); 610 } 611 612 oi->i_sync_tid = handle->h_transaction->t_tid; 613 oi->i_datasync_tid = handle->h_transaction->t_tid; 614 615 leave: 616 if (status < 0) { 617 if (*new_fe_bh) { 618 brelse(*new_fe_bh); 619 *new_fe_bh = NULL; 620 } 621 } 622 623 if (status) 624 mlog_errno(status); 625 return status; 626 } 627 628 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 629 struct inode *dir, 630 struct inode *inode, 631 dev_t dev, 632 struct buffer_head **new_fe_bh, 633 struct buffer_head *parent_fe_bh, 634 handle_t *handle, 635 struct ocfs2_alloc_context *inode_ac) 636 { 637 int status = 0; 638 u64 suballoc_loc, fe_blkno = 0; 639 u16 suballoc_bit; 640 641 *new_fe_bh = NULL; 642 643 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh, 644 inode_ac, &suballoc_loc, 645 &suballoc_bit, &fe_blkno); 646 if (status < 0) { 647 mlog_errno(status); 648 return status; 649 } 650 651 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, 652 parent_fe_bh, handle, inode_ac, 653 fe_blkno, suballoc_loc, suballoc_bit); 654 } 655 656 static int ocfs2_mkdir(struct inode *dir, 657 struct dentry *dentry, 658 umode_t mode) 659 { 660 int ret; 661 662 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, 663 OCFS2_I(dir)->ip_blkno, mode); 664 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); 665 if (ret) 666 mlog_errno(ret); 667 668 return ret; 669 } 670 671 static int ocfs2_create(struct inode *dir, 672 struct dentry *dentry, 673 umode_t mode, 674 bool excl) 675 { 676 int ret; 677 678 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name, 679 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode); 680 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); 681 if (ret) 682 mlog_errno(ret); 683 684 return ret; 685 } 686 687 static int ocfs2_link(struct dentry *old_dentry, 688 struct inode *dir, 689 struct dentry *dentry) 690 { 691 handle_t *handle; 692 struct inode *inode = d_inode(old_dentry); 693 struct inode *old_dir = d_inode(old_dentry->d_parent); 694 int err; 695 struct buffer_head *fe_bh = NULL; 696 struct buffer_head *old_dir_bh = NULL; 697 struct buffer_head *parent_fe_bh = NULL; 698 struct ocfs2_dinode *fe = NULL; 699 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 700 struct ocfs2_dir_lookup_result lookup = { NULL, }; 701 sigset_t oldset; 702 u64 old_de_ino; 703 704 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno, 705 old_dentry->d_name.len, old_dentry->d_name.name, 706 dentry->d_name.len, dentry->d_name.name); 707 708 if (S_ISDIR(inode->i_mode)) 709 return -EPERM; 710 711 dquot_initialize(dir); 712 713 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 714 &parent_fe_bh, dir, 0); 715 if (err < 0) { 716 if (err != -ENOENT) 717 mlog_errno(err); 718 return err; 719 } 720 721 /* make sure both dirs have bhs 722 * get an extra ref on old_dir_bh if old==new */ 723 if (!parent_fe_bh) { 724 if (old_dir_bh) { 725 parent_fe_bh = old_dir_bh; 726 get_bh(parent_fe_bh); 727 } else { 728 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str); 729 err = -EIO; 730 goto out; 731 } 732 } 733 734 if (!dir->i_nlink) { 735 err = -ENOENT; 736 goto out; 737 } 738 739 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 740 old_dentry->d_name.len, &old_de_ino); 741 if (err) { 742 err = -ENOENT; 743 goto out; 744 } 745 746 /* 747 * Check whether another node removed the source inode while we 748 * were in the vfs. 749 */ 750 if (old_de_ino != OCFS2_I(inode)->ip_blkno) { 751 err = -ENOENT; 752 goto out; 753 } 754 755 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 756 dentry->d_name.len); 757 if (err) 758 goto out; 759 760 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 761 dentry->d_name.name, 762 dentry->d_name.len, &lookup); 763 if (err < 0) { 764 mlog_errno(err); 765 goto out; 766 } 767 768 err = ocfs2_inode_lock(inode, &fe_bh, 1); 769 if (err < 0) { 770 if (err != -ENOENT) 771 mlog_errno(err); 772 goto out; 773 } 774 775 fe = (struct ocfs2_dinode *) fe_bh->b_data; 776 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { 777 err = -EMLINK; 778 goto out_unlock_inode; 779 } 780 781 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); 782 if (IS_ERR(handle)) { 783 err = PTR_ERR(handle); 784 handle = NULL; 785 mlog_errno(err); 786 goto out_unlock_inode; 787 } 788 789 /* Starting to change things, restart is no longer possible. */ 790 ocfs2_block_signals(&oldset); 791 792 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 793 OCFS2_JOURNAL_ACCESS_WRITE); 794 if (err < 0) { 795 mlog_errno(err); 796 goto out_commit; 797 } 798 799 inc_nlink(inode); 800 inode->i_ctime = CURRENT_TIME; 801 ocfs2_set_links_count(fe, inode->i_nlink); 802 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 803 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 804 ocfs2_journal_dirty(handle, fe_bh); 805 806 err = ocfs2_add_entry(handle, dentry, inode, 807 OCFS2_I(inode)->ip_blkno, 808 parent_fe_bh, &lookup); 809 if (err) { 810 ocfs2_add_links_count(fe, -1); 811 drop_nlink(inode); 812 mlog_errno(err); 813 goto out_commit; 814 } 815 816 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 817 if (err) { 818 mlog_errno(err); 819 goto out_commit; 820 } 821 822 ihold(inode); 823 d_instantiate(dentry, inode); 824 825 out_commit: 826 ocfs2_commit_trans(osb, handle); 827 ocfs2_unblock_signals(&oldset); 828 out_unlock_inode: 829 ocfs2_inode_unlock(inode, 1); 830 831 out: 832 ocfs2_double_unlock(old_dir, dir); 833 834 brelse(fe_bh); 835 brelse(parent_fe_bh); 836 brelse(old_dir_bh); 837 838 ocfs2_free_dir_lookup_result(&lookup); 839 840 if (err) 841 mlog_errno(err); 842 843 return err; 844 } 845 846 /* 847 * Takes and drops an exclusive lock on the given dentry. This will 848 * force other nodes to drop it. 849 */ 850 static int ocfs2_remote_dentry_delete(struct dentry *dentry) 851 { 852 int ret; 853 854 ret = ocfs2_dentry_lock(dentry, 1); 855 if (ret) 856 mlog_errno(ret); 857 else 858 ocfs2_dentry_unlock(dentry, 1); 859 860 return ret; 861 } 862 863 static inline int ocfs2_inode_is_unlinkable(struct inode *inode) 864 { 865 if (S_ISDIR(inode->i_mode)) { 866 if (inode->i_nlink == 2) 867 return 1; 868 return 0; 869 } 870 871 if (inode->i_nlink == 1) 872 return 1; 873 return 0; 874 } 875 876 static int ocfs2_unlink(struct inode *dir, 877 struct dentry *dentry) 878 { 879 int status; 880 int child_locked = 0; 881 bool is_unlinkable = false; 882 struct inode *inode = d_inode(dentry); 883 struct inode *orphan_dir = NULL; 884 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 885 u64 blkno; 886 struct ocfs2_dinode *fe = NULL; 887 struct buffer_head *fe_bh = NULL; 888 struct buffer_head *parent_node_bh = NULL; 889 handle_t *handle = NULL; 890 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 891 struct ocfs2_dir_lookup_result lookup = { NULL, }; 892 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 893 894 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, 895 dentry->d_name.name, 896 (unsigned long long)OCFS2_I(dir)->ip_blkno, 897 (unsigned long long)OCFS2_I(inode)->ip_blkno); 898 899 dquot_initialize(dir); 900 901 BUG_ON(d_inode(dentry->d_parent) != dir); 902 903 if (inode == osb->root_inode) 904 return -EPERM; 905 906 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 907 OI_LS_PARENT); 908 if (status < 0) { 909 if (status != -ENOENT) 910 mlog_errno(status); 911 return status; 912 } 913 914 status = ocfs2_find_files_on_disk(dentry->d_name.name, 915 dentry->d_name.len, &blkno, dir, 916 &lookup); 917 if (status < 0) { 918 if (status != -ENOENT) 919 mlog_errno(status); 920 goto leave; 921 } 922 923 if (OCFS2_I(inode)->ip_blkno != blkno) { 924 status = -ENOENT; 925 926 trace_ocfs2_unlink_noent( 927 (unsigned long long)OCFS2_I(inode)->ip_blkno, 928 (unsigned long long)blkno, 929 OCFS2_I(inode)->ip_flags); 930 goto leave; 931 } 932 933 status = ocfs2_inode_lock(inode, &fe_bh, 1); 934 if (status < 0) { 935 if (status != -ENOENT) 936 mlog_errno(status); 937 goto leave; 938 } 939 child_locked = 1; 940 941 if (S_ISDIR(inode->i_mode)) { 942 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 943 status = -ENOTEMPTY; 944 goto leave; 945 } 946 } 947 948 status = ocfs2_remote_dentry_delete(dentry); 949 if (status < 0) { 950 /* This remote delete should succeed under all normal 951 * circumstances. */ 952 mlog_errno(status); 953 goto leave; 954 } 955 956 if (ocfs2_inode_is_unlinkable(inode)) { 957 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 958 OCFS2_I(inode)->ip_blkno, 959 orphan_name, &orphan_insert, 960 false); 961 if (status < 0) { 962 mlog_errno(status); 963 goto leave; 964 } 965 is_unlinkable = true; 966 } 967 968 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 969 if (IS_ERR(handle)) { 970 status = PTR_ERR(handle); 971 handle = NULL; 972 mlog_errno(status); 973 goto leave; 974 } 975 976 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 977 OCFS2_JOURNAL_ACCESS_WRITE); 978 if (status < 0) { 979 mlog_errno(status); 980 goto leave; 981 } 982 983 fe = (struct ocfs2_dinode *) fe_bh->b_data; 984 985 /* delete the name from the parent dir */ 986 status = ocfs2_delete_entry(handle, dir, &lookup); 987 if (status < 0) { 988 mlog_errno(status); 989 goto leave; 990 } 991 992 if (S_ISDIR(inode->i_mode)) 993 drop_nlink(inode); 994 drop_nlink(inode); 995 ocfs2_set_links_count(fe, inode->i_nlink); 996 ocfs2_journal_dirty(handle, fe_bh); 997 998 dir->i_ctime = dir->i_mtime = CURRENT_TIME; 999 if (S_ISDIR(inode->i_mode)) 1000 drop_nlink(dir); 1001 1002 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 1003 if (status < 0) { 1004 mlog_errno(status); 1005 if (S_ISDIR(inode->i_mode)) 1006 inc_nlink(dir); 1007 goto leave; 1008 } 1009 1010 if (is_unlinkable) { 1011 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, 1012 orphan_name, &orphan_insert, orphan_dir, false); 1013 if (status < 0) 1014 mlog_errno(status); 1015 } 1016 1017 leave: 1018 if (handle) 1019 ocfs2_commit_trans(osb, handle); 1020 1021 if (child_locked) 1022 ocfs2_inode_unlock(inode, 1); 1023 1024 ocfs2_inode_unlock(dir, 1); 1025 1026 if (orphan_dir) { 1027 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1028 ocfs2_inode_unlock(orphan_dir, 1); 1029 mutex_unlock(&orphan_dir->i_mutex); 1030 iput(orphan_dir); 1031 } 1032 1033 brelse(fe_bh); 1034 brelse(parent_node_bh); 1035 1036 ocfs2_free_dir_lookup_result(&orphan_insert); 1037 ocfs2_free_dir_lookup_result(&lookup); 1038 1039 if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) 1040 mlog_errno(status); 1041 1042 return status; 1043 } 1044 1045 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, 1046 u64 src_inode_no, u64 dest_inode_no) 1047 { 1048 int ret = 0, i = 0; 1049 u64 parent_inode_no = 0; 1050 u64 child_inode_no = src_inode_no; 1051 struct inode *child_inode; 1052 1053 #define MAX_LOOKUP_TIMES 32 1054 while (1) { 1055 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); 1056 if (IS_ERR(child_inode)) { 1057 ret = PTR_ERR(child_inode); 1058 break; 1059 } 1060 1061 ret = ocfs2_inode_lock(child_inode, NULL, 0); 1062 if (ret < 0) { 1063 iput(child_inode); 1064 if (ret != -ENOENT) 1065 mlog_errno(ret); 1066 break; 1067 } 1068 1069 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, 1070 &parent_inode_no); 1071 ocfs2_inode_unlock(child_inode, 0); 1072 iput(child_inode); 1073 if (ret < 0) { 1074 ret = -ENOENT; 1075 break; 1076 } 1077 1078 if (parent_inode_no == dest_inode_no) { 1079 ret = 1; 1080 break; 1081 } 1082 1083 if (parent_inode_no == osb->root_inode->i_ino) { 1084 ret = 0; 1085 break; 1086 } 1087 1088 child_inode_no = parent_inode_no; 1089 1090 if (++i >= MAX_LOOKUP_TIMES) { 1091 mlog(ML_NOTICE, "max lookup times reached, filesystem " 1092 "may have nested directories, " 1093 "src inode: %llu, dest inode: %llu.\n", 1094 (unsigned long long)src_inode_no, 1095 (unsigned long long)dest_inode_no); 1096 ret = 0; 1097 break; 1098 } 1099 } 1100 1101 return ret; 1102 } 1103 1104 /* 1105 * The only place this should be used is rename and link! 1106 * if they have the same id, then the 1st one is the only one locked. 1107 */ 1108 static int ocfs2_double_lock(struct ocfs2_super *osb, 1109 struct buffer_head **bh1, 1110 struct inode *inode1, 1111 struct buffer_head **bh2, 1112 struct inode *inode2, 1113 int rename) 1114 { 1115 int status; 1116 int inode1_is_ancestor, inode2_is_ancestor; 1117 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 1118 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 1119 1120 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 1121 (unsigned long long)oi2->ip_blkno); 1122 1123 if (*bh1) 1124 *bh1 = NULL; 1125 if (*bh2) 1126 *bh2 = NULL; 1127 1128 /* we always want to lock the one with the lower lockid first. 1129 * and if they are nested, we lock ancestor first */ 1130 if (oi1->ip_blkno != oi2->ip_blkno) { 1131 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, 1132 oi1->ip_blkno); 1133 if (inode1_is_ancestor < 0) { 1134 status = inode1_is_ancestor; 1135 goto bail; 1136 } 1137 1138 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, 1139 oi2->ip_blkno); 1140 if (inode2_is_ancestor < 0) { 1141 status = inode2_is_ancestor; 1142 goto bail; 1143 } 1144 1145 if ((inode1_is_ancestor == 1) || 1146 (oi1->ip_blkno < oi2->ip_blkno && 1147 inode2_is_ancestor == 0)) { 1148 /* switch id1 and id2 around */ 1149 swap(bh2, bh1); 1150 swap(inode2, inode1); 1151 } 1152 /* lock id2 */ 1153 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 1154 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); 1155 if (status < 0) { 1156 if (status != -ENOENT) 1157 mlog_errno(status); 1158 goto bail; 1159 } 1160 } 1161 1162 /* lock id1 */ 1163 status = ocfs2_inode_lock_nested(inode1, bh1, 1, 1164 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 1165 if (status < 0) { 1166 /* 1167 * An error return must mean that no cluster locks 1168 * were held on function exit. 1169 */ 1170 if (oi1->ip_blkno != oi2->ip_blkno) { 1171 ocfs2_inode_unlock(inode2, 1); 1172 brelse(*bh2); 1173 *bh2 = NULL; 1174 } 1175 1176 if (status != -ENOENT) 1177 mlog_errno(status); 1178 } 1179 1180 trace_ocfs2_double_lock_end( 1181 (unsigned long long)OCFS2_I(inode1)->ip_blkno, 1182 (unsigned long long)OCFS2_I(inode2)->ip_blkno); 1183 1184 bail: 1185 if (status) 1186 mlog_errno(status); 1187 return status; 1188 } 1189 1190 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1191 { 1192 ocfs2_inode_unlock(inode1, 1); 1193 1194 if (inode1 != inode2) 1195 ocfs2_inode_unlock(inode2, 1); 1196 } 1197 1198 static int ocfs2_rename(struct inode *old_dir, 1199 struct dentry *old_dentry, 1200 struct inode *new_dir, 1201 struct dentry *new_dentry) 1202 { 1203 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1204 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1205 struct inode *old_inode = d_inode(old_dentry); 1206 struct inode *new_inode = d_inode(new_dentry); 1207 struct inode *orphan_dir = NULL; 1208 struct ocfs2_dinode *newfe = NULL; 1209 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1210 struct buffer_head *newfe_bh = NULL; 1211 struct buffer_head *old_inode_bh = NULL; 1212 struct ocfs2_super *osb = NULL; 1213 u64 newfe_blkno, old_de_ino; 1214 handle_t *handle = NULL; 1215 struct buffer_head *old_dir_bh = NULL; 1216 struct buffer_head *new_dir_bh = NULL; 1217 u32 old_dir_nlink = old_dir->i_nlink; 1218 struct ocfs2_dinode *old_di; 1219 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1220 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1221 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1222 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1223 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1224 bool should_add_orphan = false; 1225 1226 /* At some point it might be nice to break this function up a 1227 * bit. */ 1228 1229 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, 1230 old_dentry->d_name.len, old_dentry->d_name.name, 1231 new_dentry->d_name.len, new_dentry->d_name.name); 1232 1233 dquot_initialize(old_dir); 1234 dquot_initialize(new_dir); 1235 1236 osb = OCFS2_SB(old_dir->i_sb); 1237 1238 if (new_inode) { 1239 if (!igrab(new_inode)) 1240 BUG(); 1241 } 1242 1243 /* Assume a directory hierarchy thusly: 1244 * a/b/c 1245 * a/d 1246 * a,b,c, and d are all directories. 1247 * 1248 * from cwd of 'a' on both nodes: 1249 * node1: mv b/c d 1250 * node2: mv d b/c 1251 * 1252 * And that's why, just like the VFS, we need a file system 1253 * rename lock. */ 1254 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1255 status = ocfs2_rename_lock(osb); 1256 if (status < 0) { 1257 mlog_errno(status); 1258 goto bail; 1259 } 1260 rename_lock = 1; 1261 1262 /* here we cannot guarantee the inodes haven't just been 1263 * changed, so check if they are nested again */ 1264 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, 1265 old_inode->i_ino); 1266 if (status < 0) { 1267 mlog_errno(status); 1268 goto bail; 1269 } else if (status == 1) { 1270 status = -EPERM; 1271 trace_ocfs2_rename_not_permitted( 1272 (unsigned long long)old_inode->i_ino, 1273 (unsigned long long)new_dir->i_ino); 1274 goto bail; 1275 } 1276 } 1277 1278 /* if old and new are the same, this'll just do one lock. */ 1279 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1280 &new_dir_bh, new_dir, 1); 1281 if (status < 0) { 1282 mlog_errno(status); 1283 goto bail; 1284 } 1285 parents_locked = 1; 1286 1287 /* make sure both dirs have bhs 1288 * get an extra ref on old_dir_bh if old==new */ 1289 if (!new_dir_bh) { 1290 if (old_dir_bh) { 1291 new_dir_bh = old_dir_bh; 1292 get_bh(new_dir_bh); 1293 } else { 1294 mlog(ML_ERROR, "no old_dir_bh!\n"); 1295 status = -EIO; 1296 goto bail; 1297 } 1298 } 1299 1300 /* 1301 * Aside from allowing a meta data update, the locking here 1302 * also ensures that the downconvert thread on other nodes 1303 * won't have to concurrently downconvert the inode and the 1304 * dentry locks. 1305 */ 1306 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1307 OI_LS_PARENT); 1308 if (status < 0) { 1309 if (status != -ENOENT) 1310 mlog_errno(status); 1311 goto bail; 1312 } 1313 old_child_locked = 1; 1314 1315 status = ocfs2_remote_dentry_delete(old_dentry); 1316 if (status < 0) { 1317 mlog_errno(status); 1318 goto bail; 1319 } 1320 1321 if (S_ISDIR(old_inode->i_mode)) { 1322 u64 old_inode_parent; 1323 1324 update_dot_dot = 1; 1325 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1326 old_inode, 1327 &old_inode_dot_dot_res); 1328 if (status) { 1329 status = -EIO; 1330 goto bail; 1331 } 1332 1333 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1334 status = -EIO; 1335 goto bail; 1336 } 1337 1338 if (!new_inode && new_dir != old_dir && 1339 new_dir->i_nlink >= ocfs2_link_max(osb)) { 1340 status = -EMLINK; 1341 goto bail; 1342 } 1343 } 1344 1345 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1346 old_dentry->d_name.len, 1347 &old_de_ino); 1348 if (status) { 1349 status = -ENOENT; 1350 goto bail; 1351 } 1352 1353 /* 1354 * Check for inode number is _not_ due to possible IO errors. 1355 * We might rmdir the source, keep it as pwd of some process 1356 * and merrily kill the link to whatever was created under the 1357 * same name. Goodbye sticky bit ;-< 1358 */ 1359 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1360 status = -ENOENT; 1361 goto bail; 1362 } 1363 1364 /* check if the target already exists (in which case we need 1365 * to delete it */ 1366 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1367 new_dentry->d_name.len, 1368 &newfe_blkno, new_dir, 1369 &target_lookup_res); 1370 /* The only error we allow here is -ENOENT because the new 1371 * file not existing is perfectly valid. */ 1372 if ((status < 0) && (status != -ENOENT)) { 1373 /* If we cannot find the file specified we should just */ 1374 /* return the error... */ 1375 mlog_errno(status); 1376 goto bail; 1377 } 1378 if (status == 0) 1379 target_exists = 1; 1380 1381 if (!target_exists && new_inode) { 1382 /* 1383 * Target was unlinked by another node while we were 1384 * waiting to get to ocfs2_rename(). There isn't 1385 * anything we can do here to help the situation, so 1386 * bubble up the appropriate error. 1387 */ 1388 status = -ENOENT; 1389 goto bail; 1390 } 1391 1392 /* In case we need to overwrite an existing file, we blow it 1393 * away first */ 1394 if (target_exists) { 1395 /* VFS didn't think there existed an inode here, but 1396 * someone else in the cluster must have raced our 1397 * rename to create one. Today we error cleanly, in 1398 * the future we should consider calling iget to build 1399 * a new struct inode for this entry. */ 1400 if (!new_inode) { 1401 status = -EACCES; 1402 1403 trace_ocfs2_rename_target_exists(new_dentry->d_name.len, 1404 new_dentry->d_name.name); 1405 goto bail; 1406 } 1407 1408 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1409 status = -EACCES; 1410 1411 trace_ocfs2_rename_disagree( 1412 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1413 (unsigned long long)newfe_blkno, 1414 OCFS2_I(new_inode)->ip_flags); 1415 goto bail; 1416 } 1417 1418 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1419 if (status < 0) { 1420 if (status != -ENOENT) 1421 mlog_errno(status); 1422 goto bail; 1423 } 1424 new_child_locked = 1; 1425 1426 status = ocfs2_remote_dentry_delete(new_dentry); 1427 if (status < 0) { 1428 mlog_errno(status); 1429 goto bail; 1430 } 1431 1432 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1433 1434 trace_ocfs2_rename_over_existing( 1435 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1436 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1437 1438 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1439 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1440 OCFS2_I(new_inode)->ip_blkno, 1441 orphan_name, &orphan_insert, 1442 false); 1443 if (status < 0) { 1444 mlog_errno(status); 1445 goto bail; 1446 } 1447 should_add_orphan = true; 1448 } 1449 } else { 1450 BUG_ON(d_inode(new_dentry->d_parent) != new_dir); 1451 1452 status = ocfs2_check_dir_for_entry(new_dir, 1453 new_dentry->d_name.name, 1454 new_dentry->d_name.len); 1455 if (status) 1456 goto bail; 1457 1458 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1459 new_dentry->d_name.name, 1460 new_dentry->d_name.len, 1461 &target_insert); 1462 if (status < 0) { 1463 mlog_errno(status); 1464 goto bail; 1465 } 1466 } 1467 1468 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1469 if (IS_ERR(handle)) { 1470 status = PTR_ERR(handle); 1471 handle = NULL; 1472 mlog_errno(status); 1473 goto bail; 1474 } 1475 1476 if (target_exists) { 1477 if (S_ISDIR(new_inode->i_mode)) { 1478 if (new_inode->i_nlink != 2 || 1479 !ocfs2_empty_dir(new_inode)) { 1480 status = -ENOTEMPTY; 1481 goto bail; 1482 } 1483 } 1484 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1485 newfe_bh, 1486 OCFS2_JOURNAL_ACCESS_WRITE); 1487 if (status < 0) { 1488 mlog_errno(status); 1489 goto bail; 1490 } 1491 1492 /* change the dirent to point to the correct inode */ 1493 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1494 old_inode); 1495 if (status < 0) { 1496 mlog_errno(status); 1497 goto bail; 1498 } 1499 new_dir->i_version++; 1500 1501 if (S_ISDIR(new_inode->i_mode)) 1502 ocfs2_set_links_count(newfe, 0); 1503 else 1504 ocfs2_add_links_count(newfe, -1); 1505 ocfs2_journal_dirty(handle, newfe_bh); 1506 if (should_add_orphan) { 1507 status = ocfs2_orphan_add(osb, handle, new_inode, 1508 newfe_bh, orphan_name, 1509 &orphan_insert, orphan_dir, false); 1510 if (status < 0) { 1511 mlog_errno(status); 1512 goto bail; 1513 } 1514 } 1515 } else { 1516 /* if the name was not found in new_dir, add it now */ 1517 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1518 OCFS2_I(old_inode)->ip_blkno, 1519 new_dir_bh, &target_insert); 1520 } 1521 1522 old_inode->i_ctime = CURRENT_TIME; 1523 mark_inode_dirty(old_inode); 1524 1525 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1526 old_inode_bh, 1527 OCFS2_JOURNAL_ACCESS_WRITE); 1528 if (status >= 0) { 1529 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1530 1531 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); 1532 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); 1533 ocfs2_journal_dirty(handle, old_inode_bh); 1534 } else 1535 mlog_errno(status); 1536 1537 /* 1538 * Now that the name has been added to new_dir, remove the old name. 1539 * 1540 * We don't keep any directory entry context around until now 1541 * because the insert might have changed the type of directory 1542 * we're dealing with. 1543 */ 1544 status = ocfs2_find_entry(old_dentry->d_name.name, 1545 old_dentry->d_name.len, old_dir, 1546 &old_entry_lookup); 1547 if (status) 1548 goto bail; 1549 1550 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1551 if (status < 0) { 1552 mlog_errno(status); 1553 goto bail; 1554 } 1555 1556 if (new_inode) { 1557 drop_nlink(new_inode); 1558 new_inode->i_ctime = CURRENT_TIME; 1559 } 1560 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; 1561 1562 if (update_dot_dot) { 1563 status = ocfs2_update_entry(old_inode, handle, 1564 &old_inode_dot_dot_res, new_dir); 1565 drop_nlink(old_dir); 1566 if (new_inode) { 1567 drop_nlink(new_inode); 1568 } else { 1569 inc_nlink(new_dir); 1570 mark_inode_dirty(new_dir); 1571 } 1572 } 1573 mark_inode_dirty(old_dir); 1574 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1575 if (new_inode) { 1576 mark_inode_dirty(new_inode); 1577 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1578 } 1579 1580 if (old_dir != new_dir) { 1581 /* Keep the same times on both directories.*/ 1582 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; 1583 1584 /* 1585 * This will also pick up the i_nlink change from the 1586 * block above. 1587 */ 1588 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1589 } 1590 1591 if (old_dir_nlink != old_dir->i_nlink) { 1592 if (!old_dir_bh) { 1593 mlog(ML_ERROR, "need to change nlink for old dir " 1594 "%llu from %d to %d but bh is NULL!\n", 1595 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1596 (int)old_dir_nlink, old_dir->i_nlink); 1597 } else { 1598 struct ocfs2_dinode *fe; 1599 status = ocfs2_journal_access_di(handle, 1600 INODE_CACHE(old_dir), 1601 old_dir_bh, 1602 OCFS2_JOURNAL_ACCESS_WRITE); 1603 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1604 ocfs2_set_links_count(fe, old_dir->i_nlink); 1605 ocfs2_journal_dirty(handle, old_dir_bh); 1606 } 1607 } 1608 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1609 status = 0; 1610 bail: 1611 if (rename_lock) 1612 ocfs2_rename_unlock(osb); 1613 1614 if (handle) 1615 ocfs2_commit_trans(osb, handle); 1616 1617 if (parents_locked) 1618 ocfs2_double_unlock(old_dir, new_dir); 1619 1620 if (old_child_locked) 1621 ocfs2_inode_unlock(old_inode, 1); 1622 1623 if (new_child_locked) 1624 ocfs2_inode_unlock(new_inode, 1); 1625 1626 if (orphan_dir) { 1627 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1628 ocfs2_inode_unlock(orphan_dir, 1); 1629 mutex_unlock(&orphan_dir->i_mutex); 1630 iput(orphan_dir); 1631 } 1632 1633 if (new_inode) 1634 sync_mapping_buffers(old_inode->i_mapping); 1635 1636 if (new_inode) 1637 iput(new_inode); 1638 1639 ocfs2_free_dir_lookup_result(&target_lookup_res); 1640 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1641 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1642 ocfs2_free_dir_lookup_result(&orphan_insert); 1643 ocfs2_free_dir_lookup_result(&target_insert); 1644 1645 brelse(newfe_bh); 1646 brelse(old_inode_bh); 1647 brelse(old_dir_bh); 1648 brelse(new_dir_bh); 1649 1650 if (status) 1651 mlog_errno(status); 1652 1653 return status; 1654 } 1655 1656 /* 1657 * we expect i_size = strlen(symname). Copy symname into the file 1658 * data, including the null terminator. 1659 */ 1660 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1661 handle_t *handle, 1662 struct inode *inode, 1663 const char *symname) 1664 { 1665 struct buffer_head **bhs = NULL; 1666 const char *c; 1667 struct super_block *sb = osb->sb; 1668 u64 p_blkno, p_blocks; 1669 int virtual, blocks, status, i, bytes_left; 1670 1671 bytes_left = i_size_read(inode) + 1; 1672 /* we can't trust i_blocks because we're actually going to 1673 * write i_size + 1 bytes. */ 1674 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1675 1676 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, 1677 i_size_read(inode), blocks); 1678 1679 /* Sanity check -- make sure we're going to fit. */ 1680 if (bytes_left > 1681 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1682 status = -EIO; 1683 mlog_errno(status); 1684 goto bail; 1685 } 1686 1687 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1688 if (!bhs) { 1689 status = -ENOMEM; 1690 mlog_errno(status); 1691 goto bail; 1692 } 1693 1694 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1695 NULL); 1696 if (status < 0) { 1697 mlog_errno(status); 1698 goto bail; 1699 } 1700 1701 /* links can never be larger than one cluster so we know this 1702 * is all going to be contiguous, but do a sanity check 1703 * anyway. */ 1704 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1705 status = -EIO; 1706 mlog_errno(status); 1707 goto bail; 1708 } 1709 1710 virtual = 0; 1711 while(bytes_left > 0) { 1712 c = &symname[virtual * sb->s_blocksize]; 1713 1714 bhs[virtual] = sb_getblk(sb, p_blkno); 1715 if (!bhs[virtual]) { 1716 status = -ENOMEM; 1717 mlog_errno(status); 1718 goto bail; 1719 } 1720 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1721 bhs[virtual]); 1722 1723 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1724 bhs[virtual], 1725 OCFS2_JOURNAL_ACCESS_CREATE); 1726 if (status < 0) { 1727 mlog_errno(status); 1728 goto bail; 1729 } 1730 1731 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1732 1733 memcpy(bhs[virtual]->b_data, c, 1734 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1735 bytes_left); 1736 1737 ocfs2_journal_dirty(handle, bhs[virtual]); 1738 1739 virtual++; 1740 p_blkno++; 1741 bytes_left -= sb->s_blocksize; 1742 } 1743 1744 status = 0; 1745 bail: 1746 1747 if (bhs) { 1748 for(i = 0; i < blocks; i++) 1749 brelse(bhs[i]); 1750 kfree(bhs); 1751 } 1752 1753 if (status) 1754 mlog_errno(status); 1755 return status; 1756 } 1757 1758 static int ocfs2_symlink(struct inode *dir, 1759 struct dentry *dentry, 1760 const char *symname) 1761 { 1762 int status, l, credits; 1763 u64 newsize; 1764 struct ocfs2_super *osb = NULL; 1765 struct inode *inode = NULL; 1766 struct super_block *sb; 1767 struct buffer_head *new_fe_bh = NULL; 1768 struct buffer_head *parent_fe_bh = NULL; 1769 struct ocfs2_dinode *fe = NULL; 1770 struct ocfs2_dinode *dirfe; 1771 handle_t *handle = NULL; 1772 struct ocfs2_alloc_context *inode_ac = NULL; 1773 struct ocfs2_alloc_context *data_ac = NULL; 1774 struct ocfs2_alloc_context *xattr_ac = NULL; 1775 int want_clusters = 0; 1776 int xattr_credits = 0; 1777 struct ocfs2_security_xattr_info si = { 1778 .enable = 1, 1779 }; 1780 int did_quota = 0, did_quota_inode = 0; 1781 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1782 sigset_t oldset; 1783 int did_block_signals = 0; 1784 struct ocfs2_dentry_lock *dl = NULL; 1785 1786 trace_ocfs2_symlink_begin(dir, dentry, symname, 1787 dentry->d_name.len, dentry->d_name.name); 1788 1789 dquot_initialize(dir); 1790 1791 sb = dir->i_sb; 1792 osb = OCFS2_SB(sb); 1793 1794 l = strlen(symname) + 1; 1795 1796 credits = ocfs2_calc_symlink_credits(sb); 1797 1798 /* lock the parent directory */ 1799 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1800 if (status < 0) { 1801 if (status != -ENOENT) 1802 mlog_errno(status); 1803 return status; 1804 } 1805 1806 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1807 if (!ocfs2_read_links_count(dirfe)) { 1808 /* can't make a file in a deleted directory. */ 1809 status = -ENOENT; 1810 goto bail; 1811 } 1812 1813 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1814 dentry->d_name.len); 1815 if (status) 1816 goto bail; 1817 1818 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1819 dentry->d_name.name, 1820 dentry->d_name.len, &lookup); 1821 if (status < 0) { 1822 mlog_errno(status); 1823 goto bail; 1824 } 1825 1826 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1827 if (status < 0) { 1828 if (status != -ENOSPC) 1829 mlog_errno(status); 1830 goto bail; 1831 } 1832 1833 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1834 if (!inode) { 1835 status = -ENOMEM; 1836 mlog_errno(status); 1837 goto bail; 1838 } 1839 1840 /* get security xattr */ 1841 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1842 if (status) { 1843 if (status == -EOPNOTSUPP) 1844 si.enable = 0; 1845 else { 1846 mlog_errno(status); 1847 goto bail; 1848 } 1849 } 1850 1851 /* calculate meta data/clusters for setting security xattr */ 1852 if (si.enable) { 1853 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1854 &xattr_credits, &xattr_ac); 1855 if (status < 0) { 1856 mlog_errno(status); 1857 goto bail; 1858 } 1859 } 1860 1861 /* don't reserve bitmap space for fast symlinks. */ 1862 if (l > ocfs2_fast_symlink_chars(sb)) 1863 want_clusters += 1; 1864 1865 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1866 if (status < 0) { 1867 if (status != -ENOSPC) 1868 mlog_errno(status); 1869 goto bail; 1870 } 1871 1872 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1873 if (IS_ERR(handle)) { 1874 status = PTR_ERR(handle); 1875 handle = NULL; 1876 mlog_errno(status); 1877 goto bail; 1878 } 1879 1880 /* Starting to change things, restart is no longer possible. */ 1881 ocfs2_block_signals(&oldset); 1882 did_block_signals = 1; 1883 1884 status = dquot_alloc_inode(inode); 1885 if (status) 1886 goto bail; 1887 did_quota_inode = 1; 1888 1889 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1890 dentry->d_name.name, 1891 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1892 inode->i_mode); 1893 1894 status = ocfs2_mknod_locked(osb, dir, inode, 1895 0, &new_fe_bh, parent_fe_bh, handle, 1896 inode_ac); 1897 if (status < 0) { 1898 mlog_errno(status); 1899 goto bail; 1900 } 1901 1902 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1903 inode->i_rdev = 0; 1904 newsize = l - 1; 1905 inode->i_op = &ocfs2_symlink_inode_operations; 1906 if (l > ocfs2_fast_symlink_chars(sb)) { 1907 u32 offset = 0; 1908 1909 status = dquot_alloc_space_nodirty(inode, 1910 ocfs2_clusters_to_bytes(osb->sb, 1)); 1911 if (status) 1912 goto bail; 1913 did_quota = 1; 1914 inode->i_mapping->a_ops = &ocfs2_aops; 1915 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1916 new_fe_bh, 1917 handle, data_ac, NULL, 1918 NULL); 1919 if (status < 0) { 1920 if (status != -ENOSPC && status != -EINTR) { 1921 mlog(ML_ERROR, 1922 "Failed to extend file to %llu\n", 1923 (unsigned long long)newsize); 1924 mlog_errno(status); 1925 status = -ENOSPC; 1926 } 1927 goto bail; 1928 } 1929 i_size_write(inode, newsize); 1930 inode->i_blocks = ocfs2_inode_sector_count(inode); 1931 } else { 1932 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1933 memcpy((char *) fe->id2.i_symlink, symname, l); 1934 i_size_write(inode, newsize); 1935 inode->i_blocks = 0; 1936 } 1937 1938 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1939 if (status < 0) { 1940 mlog_errno(status); 1941 goto bail; 1942 } 1943 1944 if (!ocfs2_inode_is_fast_symlink(inode)) { 1945 status = ocfs2_create_symlink_data(osb, handle, inode, 1946 symname); 1947 if (status < 0) { 1948 mlog_errno(status); 1949 goto bail; 1950 } 1951 } 1952 1953 if (si.enable) { 1954 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 1955 xattr_ac, data_ac); 1956 if (status < 0) { 1957 mlog_errno(status); 1958 goto bail; 1959 } 1960 } 1961 1962 /* 1963 * Do this before adding the entry to the directory. We add 1964 * also set d_op after success so that ->d_iput() will cleanup 1965 * the dentry lock even if ocfs2_add_entry() fails below. 1966 */ 1967 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 1968 if (status) { 1969 mlog_errno(status); 1970 goto bail; 1971 } 1972 1973 dl = dentry->d_fsdata; 1974 1975 status = ocfs2_add_entry(handle, dentry, inode, 1976 le64_to_cpu(fe->i_blkno), parent_fe_bh, 1977 &lookup); 1978 if (status < 0) { 1979 mlog_errno(status); 1980 goto bail; 1981 } 1982 1983 insert_inode_hash(inode); 1984 d_instantiate(dentry, inode); 1985 bail: 1986 if (status < 0 && did_quota) 1987 dquot_free_space_nodirty(inode, 1988 ocfs2_clusters_to_bytes(osb->sb, 1)); 1989 if (status < 0 && did_quota_inode) 1990 dquot_free_inode(inode); 1991 if (handle) 1992 ocfs2_commit_trans(osb, handle); 1993 1994 ocfs2_inode_unlock(dir, 1); 1995 if (did_block_signals) 1996 ocfs2_unblock_signals(&oldset); 1997 1998 brelse(new_fe_bh); 1999 brelse(parent_fe_bh); 2000 kfree(si.value); 2001 ocfs2_free_dir_lookup_result(&lookup); 2002 if (inode_ac) 2003 ocfs2_free_alloc_context(inode_ac); 2004 if (data_ac) 2005 ocfs2_free_alloc_context(data_ac); 2006 if (xattr_ac) 2007 ocfs2_free_alloc_context(xattr_ac); 2008 if ((status < 0) && inode) { 2009 if (dl) 2010 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 2011 2012 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 2013 clear_nlink(inode); 2014 iput(inode); 2015 } 2016 2017 if (status) 2018 mlog_errno(status); 2019 2020 return status; 2021 } 2022 2023 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2024 { 2025 int status, namelen; 2026 2027 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2028 (long long)blkno); 2029 if (namelen <= 0) { 2030 if (namelen) 2031 status = namelen; 2032 else 2033 status = -EINVAL; 2034 mlog_errno(status); 2035 goto bail; 2036 } 2037 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2038 status = -EINVAL; 2039 mlog_errno(status); 2040 goto bail; 2041 } 2042 2043 trace_ocfs2_blkno_stringify(blkno, name, namelen); 2044 2045 status = 0; 2046 bail: 2047 if (status < 0) 2048 mlog_errno(status); 2049 return status; 2050 } 2051 2052 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, 2053 struct inode **ret_orphan_dir, 2054 struct buffer_head **ret_orphan_dir_bh) 2055 { 2056 struct inode *orphan_dir_inode; 2057 struct buffer_head *orphan_dir_bh = NULL; 2058 int ret = 0; 2059 2060 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2061 ORPHAN_DIR_SYSTEM_INODE, 2062 osb->slot_num); 2063 if (!orphan_dir_inode) { 2064 ret = -ENOENT; 2065 mlog_errno(ret); 2066 return ret; 2067 } 2068 2069 mutex_lock(&orphan_dir_inode->i_mutex); 2070 2071 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2072 if (ret < 0) { 2073 mutex_unlock(&orphan_dir_inode->i_mutex); 2074 iput(orphan_dir_inode); 2075 2076 mlog_errno(ret); 2077 return ret; 2078 } 2079 2080 *ret_orphan_dir = orphan_dir_inode; 2081 *ret_orphan_dir_bh = orphan_dir_bh; 2082 2083 return 0; 2084 } 2085 2086 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, 2087 struct buffer_head *orphan_dir_bh, 2088 u64 blkno, 2089 char *name, 2090 struct ocfs2_dir_lookup_result *lookup, 2091 bool dio) 2092 { 2093 int ret; 2094 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); 2095 int namelen = dio ? 2096 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2097 OCFS2_ORPHAN_NAMELEN; 2098 2099 if (dio) { 2100 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2101 OCFS2_DIO_ORPHAN_PREFIX); 2102 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2103 ret = -EINVAL; 2104 mlog_errno(ret); 2105 return ret; 2106 } 2107 2108 ret = ocfs2_blkno_stringify(blkno, 2109 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2110 } else 2111 ret = ocfs2_blkno_stringify(blkno, name); 2112 if (ret < 0) { 2113 mlog_errno(ret); 2114 return ret; 2115 } 2116 2117 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2118 orphan_dir_bh, name, 2119 namelen, lookup); 2120 if (ret < 0) { 2121 mlog_errno(ret); 2122 return ret; 2123 } 2124 2125 return 0; 2126 } 2127 2128 /** 2129 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for 2130 * insertion of an orphan. 2131 * @osb: ocfs2 file system 2132 * @ret_orphan_dir: Orphan dir inode - returned locked! 2133 * @blkno: Actual block number of the inode to be inserted into orphan dir. 2134 * @lookup: dir lookup result, to be passed back into functions like 2135 * ocfs2_orphan_add 2136 * 2137 * Returns zero on success and the ret_orphan_dir, name and lookup 2138 * fields will be populated. 2139 * 2140 * Returns non-zero on failure. 2141 */ 2142 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2143 struct inode **ret_orphan_dir, 2144 u64 blkno, 2145 char *name, 2146 struct ocfs2_dir_lookup_result *lookup, 2147 bool dio) 2148 { 2149 struct inode *orphan_dir_inode = NULL; 2150 struct buffer_head *orphan_dir_bh = NULL; 2151 int ret = 0; 2152 2153 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, 2154 &orphan_dir_bh); 2155 if (ret < 0) { 2156 mlog_errno(ret); 2157 return ret; 2158 } 2159 2160 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, 2161 blkno, name, lookup, dio); 2162 if (ret < 0) { 2163 mlog_errno(ret); 2164 goto out; 2165 } 2166 2167 *ret_orphan_dir = orphan_dir_inode; 2168 2169 out: 2170 brelse(orphan_dir_bh); 2171 2172 if (ret) { 2173 ocfs2_inode_unlock(orphan_dir_inode, 1); 2174 mutex_unlock(&orphan_dir_inode->i_mutex); 2175 iput(orphan_dir_inode); 2176 } 2177 2178 if (ret) 2179 mlog_errno(ret); 2180 return ret; 2181 } 2182 2183 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2184 handle_t *handle, 2185 struct inode *inode, 2186 struct buffer_head *fe_bh, 2187 char *name, 2188 struct ocfs2_dir_lookup_result *lookup, 2189 struct inode *orphan_dir_inode, 2190 bool dio) 2191 { 2192 struct buffer_head *orphan_dir_bh = NULL; 2193 int status = 0; 2194 struct ocfs2_dinode *orphan_fe; 2195 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 2196 int namelen = dio ? 2197 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2198 OCFS2_ORPHAN_NAMELEN; 2199 2200 trace_ocfs2_orphan_add_begin( 2201 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2202 2203 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 2204 if (status < 0) { 2205 mlog_errno(status); 2206 goto leave; 2207 } 2208 2209 status = ocfs2_journal_access_di(handle, 2210 INODE_CACHE(orphan_dir_inode), 2211 orphan_dir_bh, 2212 OCFS2_JOURNAL_ACCESS_WRITE); 2213 if (status < 0) { 2214 mlog_errno(status); 2215 goto leave; 2216 } 2217 2218 /* 2219 * We're going to journal the change of i_flags and i_orphaned_slot. 2220 * It's safe anyway, though some callers may duplicate the journaling. 2221 * Journaling within the func just make the logic look more 2222 * straightforward. 2223 */ 2224 status = ocfs2_journal_access_di(handle, 2225 INODE_CACHE(inode), 2226 fe_bh, 2227 OCFS2_JOURNAL_ACCESS_WRITE); 2228 if (status < 0) { 2229 mlog_errno(status); 2230 goto leave; 2231 } 2232 2233 /* we're a cluster, and nlink can change on disk from 2234 * underneath us... */ 2235 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2236 if (S_ISDIR(inode->i_mode)) 2237 ocfs2_add_links_count(orphan_fe, 1); 2238 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2239 ocfs2_journal_dirty(handle, orphan_dir_bh); 2240 2241 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2242 namelen, inode, 2243 OCFS2_I(inode)->ip_blkno, 2244 orphan_dir_bh, lookup); 2245 if (status < 0) { 2246 mlog_errno(status); 2247 goto rollback; 2248 } 2249 2250 if (dio) { 2251 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan 2252 * slot. 2253 */ 2254 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2255 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); 2256 } else { 2257 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL); 2258 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; 2259 2260 /* Record which orphan dir our inode now resides 2261 * in. delete_inode will use this to determine which orphan 2262 * dir to lock. */ 2263 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2264 } 2265 2266 ocfs2_journal_dirty(handle, fe_bh); 2267 2268 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, 2269 osb->slot_num); 2270 2271 rollback: 2272 if (status < 0) { 2273 if (S_ISDIR(inode->i_mode)) 2274 ocfs2_add_links_count(orphan_fe, -1); 2275 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2276 } 2277 2278 leave: 2279 brelse(orphan_dir_bh); 2280 2281 return status; 2282 } 2283 2284 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2285 int ocfs2_orphan_del(struct ocfs2_super *osb, 2286 handle_t *handle, 2287 struct inode *orphan_dir_inode, 2288 struct inode *inode, 2289 struct buffer_head *orphan_dir_bh, 2290 bool dio) 2291 { 2292 const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN; 2293 char name[namelen + 1]; 2294 struct ocfs2_dinode *orphan_fe; 2295 int status = 0; 2296 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2297 2298 if (dio) { 2299 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2300 OCFS2_DIO_ORPHAN_PREFIX); 2301 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2302 status = -EINVAL; 2303 mlog_errno(status); 2304 return status; 2305 } 2306 2307 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, 2308 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2309 } else 2310 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2311 if (status < 0) { 2312 mlog_errno(status); 2313 goto leave; 2314 } 2315 2316 trace_ocfs2_orphan_del( 2317 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2318 name, strlen(name)); 2319 2320 /* find it's spot in the orphan directory */ 2321 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode, 2322 &lookup); 2323 if (status) { 2324 mlog_errno(status); 2325 goto leave; 2326 } 2327 2328 /* remove it from the orphan directory */ 2329 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); 2330 if (status < 0) { 2331 mlog_errno(status); 2332 goto leave; 2333 } 2334 2335 status = ocfs2_journal_access_di(handle, 2336 INODE_CACHE(orphan_dir_inode), 2337 orphan_dir_bh, 2338 OCFS2_JOURNAL_ACCESS_WRITE); 2339 if (status < 0) { 2340 mlog_errno(status); 2341 goto leave; 2342 } 2343 2344 /* do the i_nlink dance! :) */ 2345 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2346 if (S_ISDIR(inode->i_mode)) 2347 ocfs2_add_links_count(orphan_fe, -1); 2348 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2349 ocfs2_journal_dirty(handle, orphan_dir_bh); 2350 2351 leave: 2352 ocfs2_free_dir_lookup_result(&lookup); 2353 2354 if (status) 2355 mlog_errno(status); 2356 return status; 2357 } 2358 2359 /** 2360 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly 2361 * allocated file. This is different from the typical 'add to orphan dir' 2362 * operation in that the inode does not yet exist. This is a problem because 2363 * the orphan dir stringifies the inode block number to come up with it's 2364 * dirent. Obviously if the inode does not yet exist we have a chicken and egg 2365 * problem. This function works around it by calling deeper into the orphan 2366 * and suballoc code than other callers. Use this only by necessity. 2367 * @dir: The directory which this inode will ultimately wind up under - not the 2368 * orphan dir! 2369 * @dir_bh: buffer_head the @dir inode block 2370 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled 2371 * with the string to be used for orphan dirent. Pass back to the orphan dir 2372 * code. 2373 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan 2374 * dir code. 2375 * @ret_di_blkno: block number where the new inode will be allocated. 2376 * @orphan_insert: Dir insert context to be passed back into orphan dir code. 2377 * @ret_inode_ac: Inode alloc context to be passed back to the allocator. 2378 * 2379 * Returns zero on success and the ret_orphan_dir, name and lookup 2380 * fields will be populated. 2381 * 2382 * Returns non-zero on failure. 2383 */ 2384 static int ocfs2_prep_new_orphaned_file(struct inode *dir, 2385 struct buffer_head *dir_bh, 2386 char *orphan_name, 2387 struct inode **ret_orphan_dir, 2388 u64 *ret_di_blkno, 2389 struct ocfs2_dir_lookup_result *orphan_insert, 2390 struct ocfs2_alloc_context **ret_inode_ac) 2391 { 2392 int ret; 2393 u64 di_blkno; 2394 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2395 struct inode *orphan_dir = NULL; 2396 struct buffer_head *orphan_dir_bh = NULL; 2397 struct ocfs2_alloc_context *inode_ac = NULL; 2398 2399 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); 2400 if (ret < 0) { 2401 mlog_errno(ret); 2402 return ret; 2403 } 2404 2405 /* reserve an inode spot */ 2406 ret = ocfs2_reserve_new_inode(osb, &inode_ac); 2407 if (ret < 0) { 2408 if (ret != -ENOSPC) 2409 mlog_errno(ret); 2410 goto out; 2411 } 2412 2413 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, 2414 &di_blkno); 2415 if (ret) { 2416 mlog_errno(ret); 2417 goto out; 2418 } 2419 2420 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, 2421 di_blkno, orphan_name, orphan_insert, 2422 false); 2423 if (ret < 0) { 2424 mlog_errno(ret); 2425 goto out; 2426 } 2427 2428 out: 2429 if (ret == 0) { 2430 *ret_orphan_dir = orphan_dir; 2431 *ret_di_blkno = di_blkno; 2432 *ret_inode_ac = inode_ac; 2433 /* 2434 * orphan_name and orphan_insert are already up to 2435 * date via prepare_orphan_dir 2436 */ 2437 } else { 2438 /* Unroll reserve_new_inode* */ 2439 if (inode_ac) 2440 ocfs2_free_alloc_context(inode_ac); 2441 2442 /* Unroll orphan dir locking */ 2443 mutex_unlock(&orphan_dir->i_mutex); 2444 ocfs2_inode_unlock(orphan_dir, 1); 2445 iput(orphan_dir); 2446 } 2447 2448 brelse(orphan_dir_bh); 2449 2450 return ret; 2451 } 2452 2453 int ocfs2_create_inode_in_orphan(struct inode *dir, 2454 int mode, 2455 struct inode **new_inode) 2456 { 2457 int status, did_quota_inode = 0; 2458 struct inode *inode = NULL; 2459 struct inode *orphan_dir = NULL; 2460 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2461 struct ocfs2_dinode *di = NULL; 2462 handle_t *handle = NULL; 2463 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2464 struct buffer_head *parent_di_bh = NULL; 2465 struct buffer_head *new_di_bh = NULL; 2466 struct ocfs2_alloc_context *inode_ac = NULL; 2467 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2468 u64 uninitialized_var(di_blkno), suballoc_loc; 2469 u16 suballoc_bit; 2470 2471 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2472 if (status < 0) { 2473 if (status != -ENOENT) 2474 mlog_errno(status); 2475 return status; 2476 } 2477 2478 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, 2479 orphan_name, &orphan_dir, 2480 &di_blkno, &orphan_insert, &inode_ac); 2481 if (status < 0) { 2482 if (status != -ENOSPC) 2483 mlog_errno(status); 2484 goto leave; 2485 } 2486 2487 inode = ocfs2_get_init_inode(dir, mode); 2488 if (!inode) { 2489 status = -ENOMEM; 2490 mlog_errno(status); 2491 goto leave; 2492 } 2493 2494 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2495 if (IS_ERR(handle)) { 2496 status = PTR_ERR(handle); 2497 handle = NULL; 2498 mlog_errno(status); 2499 goto leave; 2500 } 2501 2502 status = dquot_alloc_inode(inode); 2503 if (status) 2504 goto leave; 2505 did_quota_inode = 1; 2506 2507 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, 2508 &suballoc_loc, 2509 &suballoc_bit, di_blkno); 2510 if (status < 0) { 2511 mlog_errno(status); 2512 goto leave; 2513 } 2514 2515 clear_nlink(inode); 2516 /* do the real work now. */ 2517 status = __ocfs2_mknod_locked(dir, inode, 2518 0, &new_di_bh, parent_di_bh, handle, 2519 inode_ac, di_blkno, suballoc_loc, 2520 suballoc_bit); 2521 if (status < 0) { 2522 mlog_errno(status); 2523 goto leave; 2524 } 2525 2526 di = (struct ocfs2_dinode *)new_di_bh->b_data; 2527 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, 2528 &orphan_insert, orphan_dir, false); 2529 if (status < 0) { 2530 mlog_errno(status); 2531 goto leave; 2532 } 2533 2534 /* get open lock so that only nodes can't remove it from orphan dir. */ 2535 status = ocfs2_open_lock(inode); 2536 if (status < 0) 2537 mlog_errno(status); 2538 2539 insert_inode_hash(inode); 2540 leave: 2541 if (status < 0 && did_quota_inode) 2542 dquot_free_inode(inode); 2543 if (handle) 2544 ocfs2_commit_trans(osb, handle); 2545 2546 if (orphan_dir) { 2547 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2548 ocfs2_inode_unlock(orphan_dir, 1); 2549 mutex_unlock(&orphan_dir->i_mutex); 2550 iput(orphan_dir); 2551 } 2552 2553 if ((status < 0) && inode) { 2554 clear_nlink(inode); 2555 iput(inode); 2556 } 2557 2558 if (inode_ac) 2559 ocfs2_free_alloc_context(inode_ac); 2560 2561 brelse(new_di_bh); 2562 2563 if (!status) 2564 *new_inode = inode; 2565 2566 ocfs2_free_dir_lookup_result(&orphan_insert); 2567 2568 ocfs2_inode_unlock(dir, 1); 2569 brelse(parent_di_bh); 2570 return status; 2571 } 2572 2573 static int ocfs2_dio_orphan_recovered(struct inode *inode) 2574 { 2575 int ret; 2576 struct buffer_head *di_bh = NULL; 2577 struct ocfs2_dinode *di = NULL; 2578 2579 ret = ocfs2_inode_lock(inode, &di_bh, 1); 2580 if (ret < 0) { 2581 mlog_errno(ret); 2582 return 0; 2583 } 2584 2585 di = (struct ocfs2_dinode *) di_bh->b_data; 2586 ret = !(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)); 2587 ocfs2_inode_unlock(inode, 1); 2588 brelse(di_bh); 2589 2590 return ret; 2591 } 2592 2593 #define OCFS2_DIO_ORPHANED_FL_CHECK_INTERVAL 10000 2594 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, 2595 struct inode *inode) 2596 { 2597 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2598 struct inode *orphan_dir_inode = NULL; 2599 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2600 struct buffer_head *di_bh = NULL; 2601 int status = 0; 2602 handle_t *handle = NULL; 2603 struct ocfs2_dinode *di = NULL; 2604 2605 restart: 2606 status = ocfs2_inode_lock(inode, &di_bh, 1); 2607 if (status < 0) { 2608 mlog_errno(status); 2609 goto bail; 2610 } 2611 2612 di = (struct ocfs2_dinode *) di_bh->b_data; 2613 /* 2614 * Another append dio crashed? 2615 * If so, wait for recovery first. 2616 */ 2617 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 2618 ocfs2_inode_unlock(inode, 1); 2619 brelse(di_bh); 2620 wait_event_interruptible_timeout(OCFS2_I(inode)->append_dio_wq, 2621 ocfs2_dio_orphan_recovered(inode), 2622 msecs_to_jiffies(OCFS2_DIO_ORPHANED_FL_CHECK_INTERVAL)); 2623 goto restart; 2624 } 2625 2626 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, 2627 OCFS2_I(inode)->ip_blkno, 2628 orphan_name, 2629 &orphan_insert, 2630 true); 2631 if (status < 0) { 2632 mlog_errno(status); 2633 goto bail_unlock_inode; 2634 } 2635 2636 handle = ocfs2_start_trans(osb, 2637 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); 2638 if (IS_ERR(handle)) { 2639 status = PTR_ERR(handle); 2640 goto bail_unlock_orphan; 2641 } 2642 2643 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, 2644 &orphan_insert, orphan_dir_inode, true); 2645 if (status) 2646 mlog_errno(status); 2647 2648 ocfs2_commit_trans(osb, handle); 2649 2650 bail_unlock_orphan: 2651 ocfs2_inode_unlock(orphan_dir_inode, 1); 2652 mutex_unlock(&orphan_dir_inode->i_mutex); 2653 iput(orphan_dir_inode); 2654 2655 ocfs2_free_dir_lookup_result(&orphan_insert); 2656 2657 bail_unlock_inode: 2658 ocfs2_inode_unlock(inode, 1); 2659 brelse(di_bh); 2660 2661 bail: 2662 return status; 2663 } 2664 2665 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, 2666 struct inode *inode, struct buffer_head *di_bh, 2667 int update_isize, loff_t end) 2668 { 2669 struct inode *orphan_dir_inode = NULL; 2670 struct buffer_head *orphan_dir_bh = NULL; 2671 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2672 handle_t *handle = NULL; 2673 int status = 0; 2674 2675 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2676 ORPHAN_DIR_SYSTEM_INODE, 2677 le16_to_cpu(di->i_dio_orphaned_slot)); 2678 if (!orphan_dir_inode) { 2679 status = -ENOENT; 2680 mlog_errno(status); 2681 goto bail; 2682 } 2683 2684 mutex_lock(&orphan_dir_inode->i_mutex); 2685 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2686 if (status < 0) { 2687 mutex_unlock(&orphan_dir_inode->i_mutex); 2688 iput(orphan_dir_inode); 2689 mlog_errno(status); 2690 goto bail; 2691 } 2692 2693 handle = ocfs2_start_trans(osb, 2694 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); 2695 if (IS_ERR(handle)) { 2696 status = PTR_ERR(handle); 2697 goto bail_unlock_orphan; 2698 } 2699 2700 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); 2701 2702 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, 2703 inode, orphan_dir_bh, true); 2704 if (status < 0) { 2705 mlog_errno(status); 2706 goto bail_commit; 2707 } 2708 2709 status = ocfs2_journal_access_di(handle, 2710 INODE_CACHE(inode), 2711 di_bh, 2712 OCFS2_JOURNAL_ACCESS_WRITE); 2713 if (status < 0) { 2714 mlog_errno(status); 2715 goto bail_commit; 2716 } 2717 2718 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2719 di->i_dio_orphaned_slot = 0; 2720 2721 if (update_isize) { 2722 status = ocfs2_set_inode_size(handle, inode, di_bh, end); 2723 if (status) 2724 mlog_errno(status); 2725 } else 2726 ocfs2_journal_dirty(handle, di_bh); 2727 2728 bail_commit: 2729 ocfs2_commit_trans(osb, handle); 2730 2731 bail_unlock_orphan: 2732 ocfs2_inode_unlock(orphan_dir_inode, 1); 2733 mutex_unlock(&orphan_dir_inode->i_mutex); 2734 brelse(orphan_dir_bh); 2735 iput(orphan_dir_inode); 2736 2737 bail: 2738 return status; 2739 } 2740 2741 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2742 struct inode *inode, 2743 struct dentry *dentry) 2744 { 2745 int status = 0; 2746 struct buffer_head *parent_di_bh = NULL; 2747 handle_t *handle = NULL; 2748 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2749 struct ocfs2_dinode *dir_di, *di; 2750 struct inode *orphan_dir_inode = NULL; 2751 struct buffer_head *orphan_dir_bh = NULL; 2752 struct buffer_head *di_bh = NULL; 2753 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2754 2755 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, 2756 dentry->d_name.len, dentry->d_name.name, 2757 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2758 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2759 2760 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2761 if (status < 0) { 2762 if (status != -ENOENT) 2763 mlog_errno(status); 2764 return status; 2765 } 2766 2767 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2768 if (!dir_di->i_links_count) { 2769 /* can't make a file in a deleted directory. */ 2770 status = -ENOENT; 2771 goto leave; 2772 } 2773 2774 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2775 dentry->d_name.len); 2776 if (status) 2777 goto leave; 2778 2779 /* get a spot inside the dir. */ 2780 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2781 dentry->d_name.name, 2782 dentry->d_name.len, &lookup); 2783 if (status < 0) { 2784 mlog_errno(status); 2785 goto leave; 2786 } 2787 2788 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2789 ORPHAN_DIR_SYSTEM_INODE, 2790 osb->slot_num); 2791 if (!orphan_dir_inode) { 2792 status = -ENOENT; 2793 mlog_errno(status); 2794 goto leave; 2795 } 2796 2797 mutex_lock(&orphan_dir_inode->i_mutex); 2798 2799 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2800 if (status < 0) { 2801 mlog_errno(status); 2802 mutex_unlock(&orphan_dir_inode->i_mutex); 2803 iput(orphan_dir_inode); 2804 goto leave; 2805 } 2806 2807 status = ocfs2_read_inode_block(inode, &di_bh); 2808 if (status < 0) { 2809 mlog_errno(status); 2810 goto orphan_unlock; 2811 } 2812 2813 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2814 if (IS_ERR(handle)) { 2815 status = PTR_ERR(handle); 2816 handle = NULL; 2817 mlog_errno(status); 2818 goto orphan_unlock; 2819 } 2820 2821 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2822 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2823 if (status < 0) { 2824 mlog_errno(status); 2825 goto out_commit; 2826 } 2827 2828 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2829 orphan_dir_bh, false); 2830 if (status < 0) { 2831 mlog_errno(status); 2832 goto out_commit; 2833 } 2834 2835 di = (struct ocfs2_dinode *)di_bh->b_data; 2836 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); 2837 di->i_orphaned_slot = 0; 2838 set_nlink(inode, 1); 2839 ocfs2_set_links_count(di, inode->i_nlink); 2840 ocfs2_update_inode_fsync_trans(handle, inode, 1); 2841 ocfs2_journal_dirty(handle, di_bh); 2842 2843 status = ocfs2_add_entry(handle, dentry, inode, 2844 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2845 &lookup); 2846 if (status < 0) { 2847 mlog_errno(status); 2848 goto out_commit; 2849 } 2850 2851 status = ocfs2_dentry_attach_lock(dentry, inode, 2852 OCFS2_I(dir)->ip_blkno); 2853 if (status) { 2854 mlog_errno(status); 2855 goto out_commit; 2856 } 2857 2858 d_instantiate(dentry, inode); 2859 status = 0; 2860 out_commit: 2861 ocfs2_commit_trans(osb, handle); 2862 orphan_unlock: 2863 ocfs2_inode_unlock(orphan_dir_inode, 1); 2864 mutex_unlock(&orphan_dir_inode->i_mutex); 2865 iput(orphan_dir_inode); 2866 leave: 2867 2868 ocfs2_inode_unlock(dir, 1); 2869 2870 brelse(di_bh); 2871 brelse(parent_di_bh); 2872 brelse(orphan_dir_bh); 2873 2874 ocfs2_free_dir_lookup_result(&lookup); 2875 2876 if (status) 2877 mlog_errno(status); 2878 2879 return status; 2880 } 2881 2882 const struct inode_operations ocfs2_dir_iops = { 2883 .create = ocfs2_create, 2884 .lookup = ocfs2_lookup, 2885 .link = ocfs2_link, 2886 .unlink = ocfs2_unlink, 2887 .rmdir = ocfs2_unlink, 2888 .symlink = ocfs2_symlink, 2889 .mkdir = ocfs2_mkdir, 2890 .mknod = ocfs2_mknod, 2891 .rename = ocfs2_rename, 2892 .setattr = ocfs2_setattr, 2893 .getattr = ocfs2_getattr, 2894 .permission = ocfs2_permission, 2895 .setxattr = generic_setxattr, 2896 .getxattr = generic_getxattr, 2897 .listxattr = ocfs2_listxattr, 2898 .removexattr = generic_removexattr, 2899 .fiemap = ocfs2_fiemap, 2900 .get_acl = ocfs2_iop_get_acl, 2901 .set_acl = ocfs2_iop_set_acl, 2902 }; 2903