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 #define MLOG_MASK_PREFIX ML_NAMEI 46 #include <cluster/masklog.h> 47 48 #include "ocfs2.h" 49 50 #include "alloc.h" 51 #include "dcache.h" 52 #include "dir.h" 53 #include "dlmglue.h" 54 #include "extent_map.h" 55 #include "file.h" 56 #include "inode.h" 57 #include "journal.h" 58 #include "namei.h" 59 #include "suballoc.h" 60 #include "super.h" 61 #include "symlink.h" 62 #include "sysfile.h" 63 #include "uptodate.h" 64 #include "xattr.h" 65 #include "acl.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 84 static int ocfs2_orphan_add(struct ocfs2_super *osb, 85 handle_t *handle, 86 struct inode *inode, 87 struct ocfs2_dinode *fe, 88 char *name, 89 struct ocfs2_dir_lookup_result *lookup, 90 struct inode *orphan_dir_inode); 91 92 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 93 handle_t *handle, 94 struct inode *inode, 95 const char *symname); 96 97 /* An orphan dir name is an 8 byte value, printed as a hex string */ 98 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64))) 99 100 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, 101 struct nameidata *nd) 102 { 103 int status; 104 u64 blkno; 105 struct inode *inode = NULL; 106 struct dentry *ret; 107 struct ocfs2_inode_info *oi; 108 109 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, 110 dentry->d_name.len, dentry->d_name.name); 111 112 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { 113 ret = ERR_PTR(-ENAMETOOLONG); 114 goto bail; 115 } 116 117 mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len, 118 dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno); 119 120 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT); 121 if (status < 0) { 122 if (status != -ENOENT) 123 mlog_errno(status); 124 ret = ERR_PTR(status); 125 goto bail; 126 } 127 128 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name, 129 dentry->d_name.len, &blkno); 130 if (status < 0) 131 goto bail_add; 132 133 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0); 134 if (IS_ERR(inode)) { 135 ret = ERR_PTR(-EACCES); 136 goto bail_unlock; 137 } 138 139 oi = OCFS2_I(inode); 140 /* Clear any orphaned state... If we were able to look up the 141 * inode from a directory, it certainly can't be orphaned. We 142 * might have the bad state from a node which intended to 143 * orphan this inode but crashed before it could commit the 144 * unlink. */ 145 spin_lock(&oi->ip_lock); 146 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; 147 spin_unlock(&oi->ip_lock); 148 149 bail_add: 150 dentry->d_op = &ocfs2_dentry_ops; 151 ret = d_splice_alias(inode, dentry); 152 153 if (inode) { 154 /* 155 * If d_splice_alias() finds a DCACHE_DISCONNECTED 156 * dentry, it will d_move() it on top of ourse. The 157 * return value will indicate this however, so in 158 * those cases, we switch them around for the locking 159 * code. 160 * 161 * NOTE: This dentry already has ->d_op set from 162 * ocfs2_get_parent() and ocfs2_get_dentry() 163 */ 164 if (ret) 165 dentry = ret; 166 167 status = ocfs2_dentry_attach_lock(dentry, inode, 168 OCFS2_I(dir)->ip_blkno); 169 if (status) { 170 mlog_errno(status); 171 ret = ERR_PTR(status); 172 goto bail_unlock; 173 } 174 } 175 176 bail_unlock: 177 /* Don't drop the cluster lock until *after* the d_add -- 178 * unlink on another node will message us to remove that 179 * dentry under this lock so otherwise we can race this with 180 * the downconvert thread and have a stale dentry. */ 181 ocfs2_inode_unlock(dir, 0); 182 183 bail: 184 185 mlog_exit_ptr(ret); 186 187 return ret; 188 } 189 190 static struct inode *ocfs2_get_init_inode(struct inode *dir, int mode) 191 { 192 struct inode *inode; 193 194 inode = new_inode(dir->i_sb); 195 if (!inode) { 196 mlog(ML_ERROR, "new_inode failed!\n"); 197 return NULL; 198 } 199 200 /* populate as many fields early on as possible - many of 201 * these are used by the support functions here and in 202 * callers. */ 203 if (S_ISDIR(mode)) 204 inode->i_nlink = 2; 205 else 206 inode->i_nlink = 1; 207 inode->i_uid = current_fsuid(); 208 if (dir->i_mode & S_ISGID) { 209 inode->i_gid = dir->i_gid; 210 if (S_ISDIR(mode)) 211 mode |= S_ISGID; 212 } else 213 inode->i_gid = current_fsgid(); 214 inode->i_mode = mode; 215 vfs_dq_init(inode); 216 return inode; 217 } 218 219 static int ocfs2_mknod(struct inode *dir, 220 struct dentry *dentry, 221 int mode, 222 dev_t dev) 223 { 224 int status = 0; 225 struct buffer_head *parent_fe_bh = NULL; 226 handle_t *handle = NULL; 227 struct ocfs2_super *osb; 228 struct ocfs2_dinode *dirfe; 229 struct buffer_head *new_fe_bh = NULL; 230 struct inode *inode = NULL; 231 struct ocfs2_alloc_context *inode_ac = NULL; 232 struct ocfs2_alloc_context *data_ac = NULL; 233 struct ocfs2_alloc_context *meta_ac = NULL; 234 int want_clusters = 0; 235 int want_meta = 0; 236 int xattr_credits = 0; 237 struct ocfs2_security_xattr_info si = { 238 .enable = 1, 239 }; 240 int did_quota_inode = 0; 241 struct ocfs2_dir_lookup_result lookup = { NULL, }; 242 243 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, 244 (unsigned long)dev, dentry->d_name.len, 245 dentry->d_name.name); 246 247 /* get our super block */ 248 osb = OCFS2_SB(dir->i_sb); 249 250 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 251 if (status < 0) { 252 if (status != -ENOENT) 253 mlog_errno(status); 254 return status; 255 } 256 257 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) { 258 status = -EMLINK; 259 goto leave; 260 } 261 262 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 263 if (!ocfs2_read_links_count(dirfe)) { 264 /* can't make a file in a deleted directory. */ 265 status = -ENOENT; 266 goto leave; 267 } 268 269 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 270 dentry->d_name.len); 271 if (status) 272 goto leave; 273 274 /* get a spot inside the dir. */ 275 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 276 dentry->d_name.name, 277 dentry->d_name.len, &lookup); 278 if (status < 0) { 279 mlog_errno(status); 280 goto leave; 281 } 282 283 /* reserve an inode spot */ 284 status = ocfs2_reserve_new_inode(osb, &inode_ac); 285 if (status < 0) { 286 if (status != -ENOSPC) 287 mlog_errno(status); 288 goto leave; 289 } 290 291 inode = ocfs2_get_init_inode(dir, mode); 292 if (!inode) { 293 status = -ENOMEM; 294 mlog_errno(status); 295 goto leave; 296 } 297 298 /* get security xattr */ 299 status = ocfs2_init_security_get(inode, dir, &si); 300 if (status) { 301 if (status == -EOPNOTSUPP) 302 si.enable = 0; 303 else { 304 mlog_errno(status); 305 goto leave; 306 } 307 } 308 309 /* calculate meta data/clusters for setting security and acl xattr */ 310 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode, 311 &si, &want_clusters, 312 &xattr_credits, &want_meta); 313 if (status < 0) { 314 mlog_errno(status); 315 goto leave; 316 } 317 318 /* Reserve a cluster if creating an extent based directory. */ 319 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { 320 want_clusters += 1; 321 322 /* Dir indexing requires extra space as well */ 323 if (ocfs2_supports_indexed_dirs(osb)) 324 want_meta++; 325 } 326 327 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac); 328 if (status < 0) { 329 if (status != -ENOSPC) 330 mlog_errno(status); 331 goto leave; 332 } 333 334 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 335 if (status < 0) { 336 if (status != -ENOSPC) 337 mlog_errno(status); 338 goto leave; 339 } 340 341 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 342 S_ISDIR(mode), 343 xattr_credits)); 344 if (IS_ERR(handle)) { 345 status = PTR_ERR(handle); 346 handle = NULL; 347 mlog_errno(status); 348 goto leave; 349 } 350 351 /* We don't use standard VFS wrapper because we don't want vfs_dq_init 352 * to be called. */ 353 if (sb_any_quota_active(osb->sb) && 354 osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) { 355 status = -EDQUOT; 356 goto leave; 357 } 358 did_quota_inode = 1; 359 360 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, 361 inode->i_mode, (unsigned long)dev, dentry->d_name.len, 362 dentry->d_name.name); 363 364 /* do the real work now. */ 365 status = ocfs2_mknod_locked(osb, dir, inode, dev, 366 &new_fe_bh, parent_fe_bh, handle, 367 inode_ac); 368 if (status < 0) { 369 mlog_errno(status); 370 goto leave; 371 } 372 373 if (S_ISDIR(mode)) { 374 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 375 new_fe_bh, data_ac, meta_ac); 376 if (status < 0) { 377 mlog_errno(status); 378 goto leave; 379 } 380 381 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir), 382 parent_fe_bh, 383 OCFS2_JOURNAL_ACCESS_WRITE); 384 if (status < 0) { 385 mlog_errno(status); 386 goto leave; 387 } 388 ocfs2_add_links_count(dirfe, 1); 389 status = ocfs2_journal_dirty(handle, parent_fe_bh); 390 if (status < 0) { 391 mlog_errno(status); 392 goto leave; 393 } 394 inc_nlink(dir); 395 } 396 397 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh, 398 meta_ac, data_ac); 399 if (status < 0) { 400 mlog_errno(status); 401 goto leave; 402 } 403 404 if (si.enable) { 405 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 406 meta_ac, data_ac); 407 if (status < 0) { 408 mlog_errno(status); 409 goto leave; 410 } 411 } 412 413 status = ocfs2_add_entry(handle, dentry, inode, 414 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 415 &lookup); 416 if (status < 0) { 417 mlog_errno(status); 418 goto leave; 419 } 420 421 status = ocfs2_dentry_attach_lock(dentry, inode, 422 OCFS2_I(dir)->ip_blkno); 423 if (status) { 424 mlog_errno(status); 425 goto leave; 426 } 427 428 insert_inode_hash(inode); 429 dentry->d_op = &ocfs2_dentry_ops; 430 d_instantiate(dentry, inode); 431 status = 0; 432 leave: 433 if (status < 0 && did_quota_inode) 434 vfs_dq_free_inode(inode); 435 if (handle) 436 ocfs2_commit_trans(osb, handle); 437 438 ocfs2_inode_unlock(dir, 1); 439 440 if (status == -ENOSPC) 441 mlog(0, "Disk is full\n"); 442 443 brelse(new_fe_bh); 444 brelse(parent_fe_bh); 445 kfree(si.name); 446 kfree(si.value); 447 448 ocfs2_free_dir_lookup_result(&lookup); 449 450 if ((status < 0) && inode) { 451 clear_nlink(inode); 452 iput(inode); 453 } 454 455 if (inode_ac) 456 ocfs2_free_alloc_context(inode_ac); 457 458 if (data_ac) 459 ocfs2_free_alloc_context(data_ac); 460 461 if (meta_ac) 462 ocfs2_free_alloc_context(meta_ac); 463 464 mlog_exit(status); 465 466 return status; 467 } 468 469 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 470 struct inode *dir, 471 struct inode *inode, 472 dev_t dev, 473 struct buffer_head **new_fe_bh, 474 struct buffer_head *parent_fe_bh, 475 handle_t *handle, 476 struct ocfs2_alloc_context *inode_ac) 477 { 478 int status = 0; 479 struct ocfs2_dinode *fe = NULL; 480 struct ocfs2_extent_list *fel; 481 u64 fe_blkno = 0; 482 u16 suballoc_bit; 483 u16 feat; 484 485 *new_fe_bh = NULL; 486 487 status = ocfs2_claim_new_inode(osb, handle, dir, parent_fe_bh, 488 inode_ac, &suballoc_bit, &fe_blkno); 489 if (status < 0) { 490 mlog_errno(status); 491 goto leave; 492 } 493 494 /* populate as many fields early on as possible - many of 495 * these are used by the support functions here and in 496 * callers. */ 497 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 498 OCFS2_I(inode)->ip_blkno = fe_blkno; 499 spin_lock(&osb->osb_lock); 500 inode->i_generation = osb->s_next_generation++; 501 spin_unlock(&osb->osb_lock); 502 503 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 504 if (!*new_fe_bh) { 505 status = -EIO; 506 mlog_errno(status); 507 goto leave; 508 } 509 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh); 510 511 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 512 *new_fe_bh, 513 OCFS2_JOURNAL_ACCESS_CREATE); 514 if (status < 0) { 515 mlog_errno(status); 516 goto leave; 517 } 518 519 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 520 memset(fe, 0, osb->sb->s_blocksize); 521 522 fe->i_generation = cpu_to_le32(inode->i_generation); 523 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 524 fe->i_blkno = cpu_to_le64(fe_blkno); 525 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 526 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); 527 fe->i_uid = cpu_to_le32(inode->i_uid); 528 fe->i_gid = cpu_to_le32(inode->i_gid); 529 fe->i_mode = cpu_to_le16(inode->i_mode); 530 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 531 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 532 533 ocfs2_set_links_count(fe, inode->i_nlink); 534 535 fe->i_last_eb_blk = 0; 536 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 537 le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL); 538 fe->i_atime = fe->i_ctime = fe->i_mtime = 539 cpu_to_le64(CURRENT_TIME.tv_sec); 540 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 541 cpu_to_le32(CURRENT_TIME.tv_nsec); 542 fe->i_dtime = 0; 543 544 /* 545 * If supported, directories start with inline data. If inline 546 * isn't supported, but indexing is, we start them as indexed. 547 */ 548 feat = le16_to_cpu(fe->i_dyn_features); 549 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) { 550 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); 551 552 fe->id2.i_data.id_count = cpu_to_le16( 553 ocfs2_max_inline_data_with_xattr(osb->sb, fe)); 554 } else { 555 fel = &fe->id2.i_list; 556 fel->l_tree_depth = 0; 557 fel->l_next_free_rec = 0; 558 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 559 } 560 561 status = ocfs2_journal_dirty(handle, *new_fe_bh); 562 if (status < 0) { 563 mlog_errno(status); 564 goto leave; 565 } 566 567 ocfs2_populate_inode(inode, fe, 1); 568 ocfs2_ci_set_new(osb, INODE_CACHE(inode)); 569 if (!ocfs2_mount_local(osb)) { 570 status = ocfs2_create_new_inode_locks(inode); 571 if (status < 0) 572 mlog_errno(status); 573 } 574 575 status = 0; /* error in ocfs2_create_new_inode_locks is not 576 * critical */ 577 578 leave: 579 if (status < 0) { 580 if (*new_fe_bh) { 581 brelse(*new_fe_bh); 582 *new_fe_bh = NULL; 583 } 584 } 585 586 mlog_exit(status); 587 return status; 588 } 589 590 static int ocfs2_mkdir(struct inode *dir, 591 struct dentry *dentry, 592 int mode) 593 { 594 int ret; 595 596 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, 597 dentry->d_name.len, dentry->d_name.name); 598 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); 599 mlog_exit(ret); 600 601 return ret; 602 } 603 604 static int ocfs2_create(struct inode *dir, 605 struct dentry *dentry, 606 int mode, 607 struct nameidata *nd) 608 { 609 int ret; 610 611 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, 612 dentry->d_name.len, dentry->d_name.name); 613 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); 614 mlog_exit(ret); 615 616 return ret; 617 } 618 619 static int ocfs2_link(struct dentry *old_dentry, 620 struct inode *dir, 621 struct dentry *dentry) 622 { 623 handle_t *handle; 624 struct inode *inode = old_dentry->d_inode; 625 int err; 626 struct buffer_head *fe_bh = NULL; 627 struct buffer_head *parent_fe_bh = NULL; 628 struct ocfs2_dinode *fe = NULL; 629 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 630 struct ocfs2_dir_lookup_result lookup = { NULL, }; 631 632 mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino, 633 old_dentry->d_name.len, old_dentry->d_name.name, 634 dentry->d_name.len, dentry->d_name.name); 635 636 if (S_ISDIR(inode->i_mode)) 637 return -EPERM; 638 639 err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT); 640 if (err < 0) { 641 if (err != -ENOENT) 642 mlog_errno(err); 643 return err; 644 } 645 646 if (!dir->i_nlink) { 647 err = -ENOENT; 648 goto out; 649 } 650 651 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 652 dentry->d_name.len); 653 if (err) 654 goto out; 655 656 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 657 dentry->d_name.name, 658 dentry->d_name.len, &lookup); 659 if (err < 0) { 660 mlog_errno(err); 661 goto out; 662 } 663 664 err = ocfs2_inode_lock(inode, &fe_bh, 1); 665 if (err < 0) { 666 if (err != -ENOENT) 667 mlog_errno(err); 668 goto out; 669 } 670 671 fe = (struct ocfs2_dinode *) fe_bh->b_data; 672 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { 673 err = -EMLINK; 674 goto out_unlock_inode; 675 } 676 677 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); 678 if (IS_ERR(handle)) { 679 err = PTR_ERR(handle); 680 handle = NULL; 681 mlog_errno(err); 682 goto out_unlock_inode; 683 } 684 685 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 686 OCFS2_JOURNAL_ACCESS_WRITE); 687 if (err < 0) { 688 mlog_errno(err); 689 goto out_commit; 690 } 691 692 inc_nlink(inode); 693 inode->i_ctime = CURRENT_TIME; 694 ocfs2_set_links_count(fe, inode->i_nlink); 695 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 696 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 697 698 err = ocfs2_journal_dirty(handle, fe_bh); 699 if (err < 0) { 700 ocfs2_add_links_count(fe, -1); 701 drop_nlink(inode); 702 mlog_errno(err); 703 goto out_commit; 704 } 705 706 err = ocfs2_add_entry(handle, dentry, inode, 707 OCFS2_I(inode)->ip_blkno, 708 parent_fe_bh, &lookup); 709 if (err) { 710 ocfs2_add_links_count(fe, -1); 711 drop_nlink(inode); 712 mlog_errno(err); 713 goto out_commit; 714 } 715 716 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 717 if (err) { 718 mlog_errno(err); 719 goto out_commit; 720 } 721 722 atomic_inc(&inode->i_count); 723 dentry->d_op = &ocfs2_dentry_ops; 724 d_instantiate(dentry, inode); 725 726 out_commit: 727 ocfs2_commit_trans(osb, handle); 728 out_unlock_inode: 729 ocfs2_inode_unlock(inode, 1); 730 731 out: 732 ocfs2_inode_unlock(dir, 1); 733 734 brelse(fe_bh); 735 brelse(parent_fe_bh); 736 737 ocfs2_free_dir_lookup_result(&lookup); 738 739 mlog_exit(err); 740 741 return err; 742 } 743 744 /* 745 * Takes and drops an exclusive lock on the given dentry. This will 746 * force other nodes to drop it. 747 */ 748 static int ocfs2_remote_dentry_delete(struct dentry *dentry) 749 { 750 int ret; 751 752 ret = ocfs2_dentry_lock(dentry, 1); 753 if (ret) 754 mlog_errno(ret); 755 else 756 ocfs2_dentry_unlock(dentry, 1); 757 758 return ret; 759 } 760 761 static inline int inode_is_unlinkable(struct inode *inode) 762 { 763 if (S_ISDIR(inode->i_mode)) { 764 if (inode->i_nlink == 2) 765 return 1; 766 return 0; 767 } 768 769 if (inode->i_nlink == 1) 770 return 1; 771 return 0; 772 } 773 774 static int ocfs2_unlink(struct inode *dir, 775 struct dentry *dentry) 776 { 777 int status; 778 int child_locked = 0; 779 struct inode *inode = dentry->d_inode; 780 struct inode *orphan_dir = NULL; 781 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 782 u64 blkno; 783 struct ocfs2_dinode *fe = NULL; 784 struct buffer_head *fe_bh = NULL; 785 struct buffer_head *parent_node_bh = NULL; 786 handle_t *handle = NULL; 787 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 788 struct ocfs2_dir_lookup_result lookup = { NULL, }; 789 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 790 791 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, 792 dentry->d_name.len, dentry->d_name.name); 793 794 BUG_ON(dentry->d_parent->d_inode != dir); 795 796 mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno); 797 798 if (inode == osb->root_inode) { 799 mlog(0, "Cannot delete the root directory\n"); 800 return -EPERM; 801 } 802 803 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 804 OI_LS_PARENT); 805 if (status < 0) { 806 if (status != -ENOENT) 807 mlog_errno(status); 808 return status; 809 } 810 811 status = ocfs2_find_files_on_disk(dentry->d_name.name, 812 dentry->d_name.len, &blkno, dir, 813 &lookup); 814 if (status < 0) { 815 if (status != -ENOENT) 816 mlog_errno(status); 817 goto leave; 818 } 819 820 if (OCFS2_I(inode)->ip_blkno != blkno) { 821 status = -ENOENT; 822 823 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n", 824 (unsigned long long)OCFS2_I(inode)->ip_blkno, 825 (unsigned long long)blkno, OCFS2_I(inode)->ip_flags); 826 goto leave; 827 } 828 829 status = ocfs2_inode_lock(inode, &fe_bh, 1); 830 if (status < 0) { 831 if (status != -ENOENT) 832 mlog_errno(status); 833 goto leave; 834 } 835 child_locked = 1; 836 837 if (S_ISDIR(inode->i_mode)) { 838 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 839 status = -ENOTEMPTY; 840 goto leave; 841 } 842 } 843 844 status = ocfs2_remote_dentry_delete(dentry); 845 if (status < 0) { 846 /* This remote delete should succeed under all normal 847 * circumstances. */ 848 mlog_errno(status); 849 goto leave; 850 } 851 852 if (inode_is_unlinkable(inode)) { 853 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 854 OCFS2_I(inode)->ip_blkno, 855 orphan_name, &orphan_insert); 856 if (status < 0) { 857 mlog_errno(status); 858 goto leave; 859 } 860 } 861 862 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 863 if (IS_ERR(handle)) { 864 status = PTR_ERR(handle); 865 handle = NULL; 866 mlog_errno(status); 867 goto leave; 868 } 869 870 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 871 OCFS2_JOURNAL_ACCESS_WRITE); 872 if (status < 0) { 873 mlog_errno(status); 874 goto leave; 875 } 876 877 fe = (struct ocfs2_dinode *) fe_bh->b_data; 878 879 if (inode_is_unlinkable(inode)) { 880 status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name, 881 &orphan_insert, orphan_dir); 882 if (status < 0) { 883 mlog_errno(status); 884 goto leave; 885 } 886 } 887 888 /* delete the name from the parent dir */ 889 status = ocfs2_delete_entry(handle, dir, &lookup); 890 if (status < 0) { 891 mlog_errno(status); 892 goto leave; 893 } 894 895 if (S_ISDIR(inode->i_mode)) 896 drop_nlink(inode); 897 drop_nlink(inode); 898 ocfs2_set_links_count(fe, inode->i_nlink); 899 900 status = ocfs2_journal_dirty(handle, fe_bh); 901 if (status < 0) { 902 mlog_errno(status); 903 goto leave; 904 } 905 906 dir->i_ctime = dir->i_mtime = CURRENT_TIME; 907 if (S_ISDIR(inode->i_mode)) 908 drop_nlink(dir); 909 910 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 911 if (status < 0) { 912 mlog_errno(status); 913 if (S_ISDIR(inode->i_mode)) 914 inc_nlink(dir); 915 } 916 917 leave: 918 if (handle) 919 ocfs2_commit_trans(osb, handle); 920 921 if (child_locked) 922 ocfs2_inode_unlock(inode, 1); 923 924 ocfs2_inode_unlock(dir, 1); 925 926 if (orphan_dir) { 927 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 928 ocfs2_inode_unlock(orphan_dir, 1); 929 mutex_unlock(&orphan_dir->i_mutex); 930 iput(orphan_dir); 931 } 932 933 brelse(fe_bh); 934 brelse(parent_node_bh); 935 936 ocfs2_free_dir_lookup_result(&orphan_insert); 937 ocfs2_free_dir_lookup_result(&lookup); 938 939 mlog_exit(status); 940 941 return status; 942 } 943 944 /* 945 * The only place this should be used is rename! 946 * if they have the same id, then the 1st one is the only one locked. 947 */ 948 static int ocfs2_double_lock(struct ocfs2_super *osb, 949 struct buffer_head **bh1, 950 struct inode *inode1, 951 struct buffer_head **bh2, 952 struct inode *inode2) 953 { 954 int status; 955 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 956 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 957 struct buffer_head **tmpbh; 958 struct inode *tmpinode; 959 960 mlog_entry("(inode1 = %llu, inode2 = %llu)\n", 961 (unsigned long long)oi1->ip_blkno, 962 (unsigned long long)oi2->ip_blkno); 963 964 if (*bh1) 965 *bh1 = NULL; 966 if (*bh2) 967 *bh2 = NULL; 968 969 /* we always want to lock the one with the lower lockid first. */ 970 if (oi1->ip_blkno != oi2->ip_blkno) { 971 if (oi1->ip_blkno < oi2->ip_blkno) { 972 /* switch id1 and id2 around */ 973 mlog(0, "switching them around...\n"); 974 tmpbh = bh2; 975 bh2 = bh1; 976 bh1 = tmpbh; 977 978 tmpinode = inode2; 979 inode2 = inode1; 980 inode1 = tmpinode; 981 } 982 /* lock id2 */ 983 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 984 OI_LS_RENAME1); 985 if (status < 0) { 986 if (status != -ENOENT) 987 mlog_errno(status); 988 goto bail; 989 } 990 } 991 992 /* lock id1 */ 993 status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2); 994 if (status < 0) { 995 /* 996 * An error return must mean that no cluster locks 997 * were held on function exit. 998 */ 999 if (oi1->ip_blkno != oi2->ip_blkno) 1000 ocfs2_inode_unlock(inode2, 1); 1001 1002 if (status != -ENOENT) 1003 mlog_errno(status); 1004 } 1005 1006 bail: 1007 mlog_exit(status); 1008 return status; 1009 } 1010 1011 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1012 { 1013 ocfs2_inode_unlock(inode1, 1); 1014 1015 if (inode1 != inode2) 1016 ocfs2_inode_unlock(inode2, 1); 1017 } 1018 1019 static int ocfs2_rename(struct inode *old_dir, 1020 struct dentry *old_dentry, 1021 struct inode *new_dir, 1022 struct dentry *new_dentry) 1023 { 1024 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1025 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1026 struct inode *old_inode = old_dentry->d_inode; 1027 struct inode *new_inode = new_dentry->d_inode; 1028 struct inode *orphan_dir = NULL; 1029 struct ocfs2_dinode *newfe = NULL; 1030 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1031 struct buffer_head *newfe_bh = NULL; 1032 struct buffer_head *old_inode_bh = NULL; 1033 struct ocfs2_super *osb = NULL; 1034 u64 newfe_blkno, old_de_ino; 1035 handle_t *handle = NULL; 1036 struct buffer_head *old_dir_bh = NULL; 1037 struct buffer_head *new_dir_bh = NULL; 1038 nlink_t old_dir_nlink = old_dir->i_nlink; 1039 struct ocfs2_dinode *old_di; 1040 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1041 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1042 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1043 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1044 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1045 1046 /* At some point it might be nice to break this function up a 1047 * bit. */ 1048 1049 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n", 1050 old_dir, old_dentry, new_dir, new_dentry, 1051 old_dentry->d_name.len, old_dentry->d_name.name, 1052 new_dentry->d_name.len, new_dentry->d_name.name); 1053 1054 osb = OCFS2_SB(old_dir->i_sb); 1055 1056 if (new_inode) { 1057 if (!igrab(new_inode)) 1058 BUG(); 1059 } 1060 1061 /* Assume a directory hierarchy thusly: 1062 * a/b/c 1063 * a/d 1064 * a,b,c, and d are all directories. 1065 * 1066 * from cwd of 'a' on both nodes: 1067 * node1: mv b/c d 1068 * node2: mv d b/c 1069 * 1070 * And that's why, just like the VFS, we need a file system 1071 * rename lock. */ 1072 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1073 status = ocfs2_rename_lock(osb); 1074 if (status < 0) { 1075 mlog_errno(status); 1076 goto bail; 1077 } 1078 rename_lock = 1; 1079 } 1080 1081 /* if old and new are the same, this'll just do one lock. */ 1082 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1083 &new_dir_bh, new_dir); 1084 if (status < 0) { 1085 mlog_errno(status); 1086 goto bail; 1087 } 1088 parents_locked = 1; 1089 1090 /* make sure both dirs have bhs 1091 * get an extra ref on old_dir_bh if old==new */ 1092 if (!new_dir_bh) { 1093 if (old_dir_bh) { 1094 new_dir_bh = old_dir_bh; 1095 get_bh(new_dir_bh); 1096 } else { 1097 mlog(ML_ERROR, "no old_dir_bh!\n"); 1098 status = -EIO; 1099 goto bail; 1100 } 1101 } 1102 1103 /* 1104 * Aside from allowing a meta data update, the locking here 1105 * also ensures that the downconvert thread on other nodes 1106 * won't have to concurrently downconvert the inode and the 1107 * dentry locks. 1108 */ 1109 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1110 OI_LS_PARENT); 1111 if (status < 0) { 1112 if (status != -ENOENT) 1113 mlog_errno(status); 1114 goto bail; 1115 } 1116 old_child_locked = 1; 1117 1118 status = ocfs2_remote_dentry_delete(old_dentry); 1119 if (status < 0) { 1120 mlog_errno(status); 1121 goto bail; 1122 } 1123 1124 if (S_ISDIR(old_inode->i_mode)) { 1125 u64 old_inode_parent; 1126 1127 update_dot_dot = 1; 1128 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1129 old_inode, 1130 &old_inode_dot_dot_res); 1131 if (status) { 1132 status = -EIO; 1133 goto bail; 1134 } 1135 1136 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1137 status = -EIO; 1138 goto bail; 1139 } 1140 1141 if (!new_inode && new_dir != old_dir && 1142 new_dir->i_nlink >= ocfs2_link_max(osb)) { 1143 status = -EMLINK; 1144 goto bail; 1145 } 1146 } 1147 1148 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1149 old_dentry->d_name.len, 1150 &old_de_ino); 1151 if (status) { 1152 status = -ENOENT; 1153 goto bail; 1154 } 1155 1156 /* 1157 * Check for inode number is _not_ due to possible IO errors. 1158 * We might rmdir the source, keep it as pwd of some process 1159 * and merrily kill the link to whatever was created under the 1160 * same name. Goodbye sticky bit ;-< 1161 */ 1162 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1163 status = -ENOENT; 1164 goto bail; 1165 } 1166 1167 /* check if the target already exists (in which case we need 1168 * to delete it */ 1169 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1170 new_dentry->d_name.len, 1171 &newfe_blkno, new_dir, 1172 &target_lookup_res); 1173 /* The only error we allow here is -ENOENT because the new 1174 * file not existing is perfectly valid. */ 1175 if ((status < 0) && (status != -ENOENT)) { 1176 /* If we cannot find the file specified we should just */ 1177 /* return the error... */ 1178 mlog_errno(status); 1179 goto bail; 1180 } 1181 if (status == 0) 1182 target_exists = 1; 1183 1184 if (!target_exists && new_inode) { 1185 /* 1186 * Target was unlinked by another node while we were 1187 * waiting to get to ocfs2_rename(). There isn't 1188 * anything we can do here to help the situation, so 1189 * bubble up the appropriate error. 1190 */ 1191 status = -ENOENT; 1192 goto bail; 1193 } 1194 1195 /* In case we need to overwrite an existing file, we blow it 1196 * away first */ 1197 if (target_exists) { 1198 /* VFS didn't think there existed an inode here, but 1199 * someone else in the cluster must have raced our 1200 * rename to create one. Today we error cleanly, in 1201 * the future we should consider calling iget to build 1202 * a new struct inode for this entry. */ 1203 if (!new_inode) { 1204 status = -EACCES; 1205 1206 mlog(0, "We found an inode for name %.*s but VFS " 1207 "didn't give us one.\n", new_dentry->d_name.len, 1208 new_dentry->d_name.name); 1209 goto bail; 1210 } 1211 1212 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1213 status = -EACCES; 1214 1215 mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n", 1216 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1217 (unsigned long long)newfe_blkno, 1218 OCFS2_I(new_inode)->ip_flags); 1219 goto bail; 1220 } 1221 1222 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1223 if (status < 0) { 1224 if (status != -ENOENT) 1225 mlog_errno(status); 1226 goto bail; 1227 } 1228 new_child_locked = 1; 1229 1230 status = ocfs2_remote_dentry_delete(new_dentry); 1231 if (status < 0) { 1232 mlog_errno(status); 1233 goto bail; 1234 } 1235 1236 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1237 1238 mlog(0, "aha rename over existing... new_blkno=%llu " 1239 "newfebh=%p bhblocknr=%llu\n", 1240 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1241 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1242 1243 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1244 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1245 OCFS2_I(new_inode)->ip_blkno, 1246 orphan_name, &orphan_insert); 1247 if (status < 0) { 1248 mlog_errno(status); 1249 goto bail; 1250 } 1251 } 1252 } else { 1253 BUG_ON(new_dentry->d_parent->d_inode != new_dir); 1254 1255 status = ocfs2_check_dir_for_entry(new_dir, 1256 new_dentry->d_name.name, 1257 new_dentry->d_name.len); 1258 if (status) 1259 goto bail; 1260 1261 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1262 new_dentry->d_name.name, 1263 new_dentry->d_name.len, 1264 &target_insert); 1265 if (status < 0) { 1266 mlog_errno(status); 1267 goto bail; 1268 } 1269 } 1270 1271 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1272 if (IS_ERR(handle)) { 1273 status = PTR_ERR(handle); 1274 handle = NULL; 1275 mlog_errno(status); 1276 goto bail; 1277 } 1278 1279 if (target_exists) { 1280 if (S_ISDIR(new_inode->i_mode)) { 1281 if (new_inode->i_nlink != 2 || 1282 !ocfs2_empty_dir(new_inode)) { 1283 status = -ENOTEMPTY; 1284 goto bail; 1285 } 1286 } 1287 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1288 newfe_bh, 1289 OCFS2_JOURNAL_ACCESS_WRITE); 1290 if (status < 0) { 1291 mlog_errno(status); 1292 goto bail; 1293 } 1294 1295 if (S_ISDIR(new_inode->i_mode) || 1296 (ocfs2_read_links_count(newfe) == 1)) { 1297 status = ocfs2_orphan_add(osb, handle, new_inode, 1298 newfe, orphan_name, 1299 &orphan_insert, orphan_dir); 1300 if (status < 0) { 1301 mlog_errno(status); 1302 goto bail; 1303 } 1304 } 1305 1306 /* change the dirent to point to the correct inode */ 1307 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1308 old_inode); 1309 if (status < 0) { 1310 mlog_errno(status); 1311 goto bail; 1312 } 1313 new_dir->i_version++; 1314 1315 if (S_ISDIR(new_inode->i_mode)) 1316 ocfs2_set_links_count(newfe, 0); 1317 else 1318 ocfs2_add_links_count(newfe, -1); 1319 1320 status = ocfs2_journal_dirty(handle, newfe_bh); 1321 if (status < 0) { 1322 mlog_errno(status); 1323 goto bail; 1324 } 1325 } else { 1326 /* if the name was not found in new_dir, add it now */ 1327 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1328 OCFS2_I(old_inode)->ip_blkno, 1329 new_dir_bh, &target_insert); 1330 } 1331 1332 old_inode->i_ctime = CURRENT_TIME; 1333 mark_inode_dirty(old_inode); 1334 1335 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1336 old_inode_bh, 1337 OCFS2_JOURNAL_ACCESS_WRITE); 1338 if (status >= 0) { 1339 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1340 1341 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); 1342 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); 1343 1344 status = ocfs2_journal_dirty(handle, old_inode_bh); 1345 if (status < 0) 1346 mlog_errno(status); 1347 } else 1348 mlog_errno(status); 1349 1350 /* 1351 * Now that the name has been added to new_dir, remove the old name. 1352 * 1353 * We don't keep any directory entry context around until now 1354 * because the insert might have changed the type of directory 1355 * we're dealing with. 1356 */ 1357 status = ocfs2_find_entry(old_dentry->d_name.name, 1358 old_dentry->d_name.len, old_dir, 1359 &old_entry_lookup); 1360 if (status) 1361 goto bail; 1362 1363 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1364 if (status < 0) { 1365 mlog_errno(status); 1366 goto bail; 1367 } 1368 1369 if (new_inode) { 1370 new_inode->i_nlink--; 1371 new_inode->i_ctime = CURRENT_TIME; 1372 } 1373 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; 1374 1375 if (update_dot_dot) { 1376 status = ocfs2_update_entry(old_inode, handle, 1377 &old_inode_dot_dot_res, new_dir); 1378 old_dir->i_nlink--; 1379 if (new_inode) { 1380 new_inode->i_nlink--; 1381 } else { 1382 inc_nlink(new_dir); 1383 mark_inode_dirty(new_dir); 1384 } 1385 } 1386 mark_inode_dirty(old_dir); 1387 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1388 if (new_inode) { 1389 mark_inode_dirty(new_inode); 1390 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1391 } 1392 1393 if (old_dir != new_dir) { 1394 /* Keep the same times on both directories.*/ 1395 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; 1396 1397 /* 1398 * This will also pick up the i_nlink change from the 1399 * block above. 1400 */ 1401 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1402 } 1403 1404 if (old_dir_nlink != old_dir->i_nlink) { 1405 if (!old_dir_bh) { 1406 mlog(ML_ERROR, "need to change nlink for old dir " 1407 "%llu from %d to %d but bh is NULL!\n", 1408 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1409 (int)old_dir_nlink, old_dir->i_nlink); 1410 } else { 1411 struct ocfs2_dinode *fe; 1412 status = ocfs2_journal_access_di(handle, 1413 INODE_CACHE(old_dir), 1414 old_dir_bh, 1415 OCFS2_JOURNAL_ACCESS_WRITE); 1416 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1417 ocfs2_set_links_count(fe, old_dir->i_nlink); 1418 status = ocfs2_journal_dirty(handle, old_dir_bh); 1419 } 1420 } 1421 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1422 status = 0; 1423 bail: 1424 if (rename_lock) 1425 ocfs2_rename_unlock(osb); 1426 1427 if (handle) 1428 ocfs2_commit_trans(osb, handle); 1429 1430 if (parents_locked) 1431 ocfs2_double_unlock(old_dir, new_dir); 1432 1433 if (old_child_locked) 1434 ocfs2_inode_unlock(old_inode, 1); 1435 1436 if (new_child_locked) 1437 ocfs2_inode_unlock(new_inode, 1); 1438 1439 if (orphan_dir) { 1440 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1441 ocfs2_inode_unlock(orphan_dir, 1); 1442 mutex_unlock(&orphan_dir->i_mutex); 1443 iput(orphan_dir); 1444 } 1445 1446 if (new_inode) 1447 sync_mapping_buffers(old_inode->i_mapping); 1448 1449 if (new_inode) 1450 iput(new_inode); 1451 1452 ocfs2_free_dir_lookup_result(&target_lookup_res); 1453 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1454 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1455 ocfs2_free_dir_lookup_result(&orphan_insert); 1456 ocfs2_free_dir_lookup_result(&target_insert); 1457 1458 brelse(newfe_bh); 1459 brelse(old_inode_bh); 1460 brelse(old_dir_bh); 1461 brelse(new_dir_bh); 1462 1463 mlog_exit(status); 1464 1465 return status; 1466 } 1467 1468 /* 1469 * we expect i_size = strlen(symname). Copy symname into the file 1470 * data, including the null terminator. 1471 */ 1472 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1473 handle_t *handle, 1474 struct inode *inode, 1475 const char *symname) 1476 { 1477 struct buffer_head **bhs = NULL; 1478 const char *c; 1479 struct super_block *sb = osb->sb; 1480 u64 p_blkno, p_blocks; 1481 int virtual, blocks, status, i, bytes_left; 1482 1483 bytes_left = i_size_read(inode) + 1; 1484 /* we can't trust i_blocks because we're actually going to 1485 * write i_size + 1 bytes. */ 1486 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1487 1488 mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n", 1489 (unsigned long long)inode->i_blocks, 1490 i_size_read(inode), blocks); 1491 1492 /* Sanity check -- make sure we're going to fit. */ 1493 if (bytes_left > 1494 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1495 status = -EIO; 1496 mlog_errno(status); 1497 goto bail; 1498 } 1499 1500 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1501 if (!bhs) { 1502 status = -ENOMEM; 1503 mlog_errno(status); 1504 goto bail; 1505 } 1506 1507 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1508 NULL); 1509 if (status < 0) { 1510 mlog_errno(status); 1511 goto bail; 1512 } 1513 1514 /* links can never be larger than one cluster so we know this 1515 * is all going to be contiguous, but do a sanity check 1516 * anyway. */ 1517 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1518 status = -EIO; 1519 mlog_errno(status); 1520 goto bail; 1521 } 1522 1523 virtual = 0; 1524 while(bytes_left > 0) { 1525 c = &symname[virtual * sb->s_blocksize]; 1526 1527 bhs[virtual] = sb_getblk(sb, p_blkno); 1528 if (!bhs[virtual]) { 1529 status = -ENOMEM; 1530 mlog_errno(status); 1531 goto bail; 1532 } 1533 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1534 bhs[virtual]); 1535 1536 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1537 bhs[virtual], 1538 OCFS2_JOURNAL_ACCESS_CREATE); 1539 if (status < 0) { 1540 mlog_errno(status); 1541 goto bail; 1542 } 1543 1544 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1545 1546 memcpy(bhs[virtual]->b_data, c, 1547 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1548 bytes_left); 1549 1550 status = ocfs2_journal_dirty(handle, bhs[virtual]); 1551 if (status < 0) { 1552 mlog_errno(status); 1553 goto bail; 1554 } 1555 1556 virtual++; 1557 p_blkno++; 1558 bytes_left -= sb->s_blocksize; 1559 } 1560 1561 status = 0; 1562 bail: 1563 1564 if (bhs) { 1565 for(i = 0; i < blocks; i++) 1566 brelse(bhs[i]); 1567 kfree(bhs); 1568 } 1569 1570 mlog_exit(status); 1571 return status; 1572 } 1573 1574 static int ocfs2_symlink(struct inode *dir, 1575 struct dentry *dentry, 1576 const char *symname) 1577 { 1578 int status, l, credits; 1579 u64 newsize; 1580 struct ocfs2_super *osb = NULL; 1581 struct inode *inode = NULL; 1582 struct super_block *sb; 1583 struct buffer_head *new_fe_bh = NULL; 1584 struct buffer_head *parent_fe_bh = NULL; 1585 struct ocfs2_dinode *fe = NULL; 1586 struct ocfs2_dinode *dirfe; 1587 handle_t *handle = NULL; 1588 struct ocfs2_alloc_context *inode_ac = NULL; 1589 struct ocfs2_alloc_context *data_ac = NULL; 1590 struct ocfs2_alloc_context *xattr_ac = NULL; 1591 int want_clusters = 0; 1592 int xattr_credits = 0; 1593 struct ocfs2_security_xattr_info si = { 1594 .enable = 1, 1595 }; 1596 int did_quota = 0, did_quota_inode = 0; 1597 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1598 1599 mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir, 1600 dentry, symname, dentry->d_name.len, dentry->d_name.name); 1601 1602 sb = dir->i_sb; 1603 osb = OCFS2_SB(sb); 1604 1605 l = strlen(symname) + 1; 1606 1607 credits = ocfs2_calc_symlink_credits(sb); 1608 1609 /* lock the parent directory */ 1610 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1611 if (status < 0) { 1612 if (status != -ENOENT) 1613 mlog_errno(status); 1614 return status; 1615 } 1616 1617 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1618 if (!ocfs2_read_links_count(dirfe)) { 1619 /* can't make a file in a deleted directory. */ 1620 status = -ENOENT; 1621 goto bail; 1622 } 1623 1624 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1625 dentry->d_name.len); 1626 if (status) 1627 goto bail; 1628 1629 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1630 dentry->d_name.name, 1631 dentry->d_name.len, &lookup); 1632 if (status < 0) { 1633 mlog_errno(status); 1634 goto bail; 1635 } 1636 1637 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1638 if (status < 0) { 1639 if (status != -ENOSPC) 1640 mlog_errno(status); 1641 goto bail; 1642 } 1643 1644 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1645 if (!inode) { 1646 status = -ENOMEM; 1647 mlog_errno(status); 1648 goto bail; 1649 } 1650 1651 /* get security xattr */ 1652 status = ocfs2_init_security_get(inode, dir, &si); 1653 if (status) { 1654 if (status == -EOPNOTSUPP) 1655 si.enable = 0; 1656 else { 1657 mlog_errno(status); 1658 goto bail; 1659 } 1660 } 1661 1662 /* calculate meta data/clusters for setting security xattr */ 1663 if (si.enable) { 1664 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1665 &xattr_credits, &xattr_ac); 1666 if (status < 0) { 1667 mlog_errno(status); 1668 goto bail; 1669 } 1670 } 1671 1672 /* don't reserve bitmap space for fast symlinks. */ 1673 if (l > ocfs2_fast_symlink_chars(sb)) 1674 want_clusters += 1; 1675 1676 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1677 if (status < 0) { 1678 if (status != -ENOSPC) 1679 mlog_errno(status); 1680 goto bail; 1681 } 1682 1683 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1684 if (IS_ERR(handle)) { 1685 status = PTR_ERR(handle); 1686 handle = NULL; 1687 mlog_errno(status); 1688 goto bail; 1689 } 1690 1691 /* We don't use standard VFS wrapper because we don't want vfs_dq_init 1692 * to be called. */ 1693 if (sb_any_quota_active(osb->sb) && 1694 osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) { 1695 status = -EDQUOT; 1696 goto bail; 1697 } 1698 did_quota_inode = 1; 1699 1700 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, 1701 inode->i_mode, dentry->d_name.len, 1702 dentry->d_name.name); 1703 1704 status = ocfs2_mknod_locked(osb, dir, inode, 1705 0, &new_fe_bh, parent_fe_bh, handle, 1706 inode_ac); 1707 if (status < 0) { 1708 mlog_errno(status); 1709 goto bail; 1710 } 1711 1712 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1713 inode->i_rdev = 0; 1714 newsize = l - 1; 1715 if (l > ocfs2_fast_symlink_chars(sb)) { 1716 u32 offset = 0; 1717 1718 inode->i_op = &ocfs2_symlink_inode_operations; 1719 if (vfs_dq_alloc_space_nodirty(inode, 1720 ocfs2_clusters_to_bytes(osb->sb, 1))) { 1721 status = -EDQUOT; 1722 goto bail; 1723 } 1724 did_quota = 1; 1725 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1726 new_fe_bh, 1727 handle, data_ac, NULL, 1728 NULL); 1729 if (status < 0) { 1730 if (status != -ENOSPC && status != -EINTR) { 1731 mlog(ML_ERROR, 1732 "Failed to extend file to %llu\n", 1733 (unsigned long long)newsize); 1734 mlog_errno(status); 1735 status = -ENOSPC; 1736 } 1737 goto bail; 1738 } 1739 i_size_write(inode, newsize); 1740 inode->i_blocks = ocfs2_inode_sector_count(inode); 1741 } else { 1742 inode->i_op = &ocfs2_fast_symlink_inode_operations; 1743 memcpy((char *) fe->id2.i_symlink, symname, l); 1744 i_size_write(inode, newsize); 1745 inode->i_blocks = 0; 1746 } 1747 1748 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1749 if (status < 0) { 1750 mlog_errno(status); 1751 goto bail; 1752 } 1753 1754 if (!ocfs2_inode_is_fast_symlink(inode)) { 1755 status = ocfs2_create_symlink_data(osb, handle, inode, 1756 symname); 1757 if (status < 0) { 1758 mlog_errno(status); 1759 goto bail; 1760 } 1761 } 1762 1763 if (si.enable) { 1764 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 1765 xattr_ac, data_ac); 1766 if (status < 0) { 1767 mlog_errno(status); 1768 goto bail; 1769 } 1770 } 1771 1772 status = ocfs2_add_entry(handle, dentry, inode, 1773 le64_to_cpu(fe->i_blkno), parent_fe_bh, 1774 &lookup); 1775 if (status < 0) { 1776 mlog_errno(status); 1777 goto bail; 1778 } 1779 1780 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 1781 if (status) { 1782 mlog_errno(status); 1783 goto bail; 1784 } 1785 1786 insert_inode_hash(inode); 1787 dentry->d_op = &ocfs2_dentry_ops; 1788 d_instantiate(dentry, inode); 1789 bail: 1790 if (status < 0 && did_quota) 1791 vfs_dq_free_space_nodirty(inode, 1792 ocfs2_clusters_to_bytes(osb->sb, 1)); 1793 if (status < 0 && did_quota_inode) 1794 vfs_dq_free_inode(inode); 1795 if (handle) 1796 ocfs2_commit_trans(osb, handle); 1797 1798 ocfs2_inode_unlock(dir, 1); 1799 1800 brelse(new_fe_bh); 1801 brelse(parent_fe_bh); 1802 kfree(si.name); 1803 kfree(si.value); 1804 ocfs2_free_dir_lookup_result(&lookup); 1805 if (inode_ac) 1806 ocfs2_free_alloc_context(inode_ac); 1807 if (data_ac) 1808 ocfs2_free_alloc_context(data_ac); 1809 if (xattr_ac) 1810 ocfs2_free_alloc_context(xattr_ac); 1811 if ((status < 0) && inode) { 1812 clear_nlink(inode); 1813 iput(inode); 1814 } 1815 1816 mlog_exit(status); 1817 1818 return status; 1819 } 1820 1821 static int ocfs2_blkno_stringify(u64 blkno, char *name) 1822 { 1823 int status, namelen; 1824 1825 mlog_entry_void(); 1826 1827 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 1828 (long long)blkno); 1829 if (namelen <= 0) { 1830 if (namelen) 1831 status = namelen; 1832 else 1833 status = -EINVAL; 1834 mlog_errno(status); 1835 goto bail; 1836 } 1837 if (namelen != OCFS2_ORPHAN_NAMELEN) { 1838 status = -EINVAL; 1839 mlog_errno(status); 1840 goto bail; 1841 } 1842 1843 mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name, 1844 namelen); 1845 1846 status = 0; 1847 bail: 1848 mlog_exit(status); 1849 return status; 1850 } 1851 1852 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 1853 struct inode **ret_orphan_dir, 1854 u64 blkno, 1855 char *name, 1856 struct ocfs2_dir_lookup_result *lookup) 1857 { 1858 struct inode *orphan_dir_inode; 1859 struct buffer_head *orphan_dir_bh = NULL; 1860 int status = 0; 1861 1862 status = ocfs2_blkno_stringify(blkno, name); 1863 if (status < 0) { 1864 mlog_errno(status); 1865 return status; 1866 } 1867 1868 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 1869 ORPHAN_DIR_SYSTEM_INODE, 1870 osb->slot_num); 1871 if (!orphan_dir_inode) { 1872 status = -ENOENT; 1873 mlog_errno(status); 1874 return status; 1875 } 1876 1877 mutex_lock(&orphan_dir_inode->i_mutex); 1878 1879 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 1880 if (status < 0) { 1881 mlog_errno(status); 1882 goto leave; 1883 } 1884 1885 status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 1886 orphan_dir_bh, name, 1887 OCFS2_ORPHAN_NAMELEN, lookup); 1888 if (status < 0) { 1889 ocfs2_inode_unlock(orphan_dir_inode, 1); 1890 1891 mlog_errno(status); 1892 goto leave; 1893 } 1894 1895 *ret_orphan_dir = orphan_dir_inode; 1896 1897 leave: 1898 if (status) { 1899 mutex_unlock(&orphan_dir_inode->i_mutex); 1900 iput(orphan_dir_inode); 1901 } 1902 1903 brelse(orphan_dir_bh); 1904 1905 mlog_exit(status); 1906 return status; 1907 } 1908 1909 static int ocfs2_orphan_add(struct ocfs2_super *osb, 1910 handle_t *handle, 1911 struct inode *inode, 1912 struct ocfs2_dinode *fe, 1913 char *name, 1914 struct ocfs2_dir_lookup_result *lookup, 1915 struct inode *orphan_dir_inode) 1916 { 1917 struct buffer_head *orphan_dir_bh = NULL; 1918 int status = 0; 1919 struct ocfs2_dinode *orphan_fe; 1920 1921 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino); 1922 1923 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 1924 if (status < 0) { 1925 mlog_errno(status); 1926 goto leave; 1927 } 1928 1929 status = ocfs2_journal_access_di(handle, 1930 INODE_CACHE(orphan_dir_inode), 1931 orphan_dir_bh, 1932 OCFS2_JOURNAL_ACCESS_WRITE); 1933 if (status < 0) { 1934 mlog_errno(status); 1935 goto leave; 1936 } 1937 1938 /* we're a cluster, and nlink can change on disk from 1939 * underneath us... */ 1940 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 1941 if (S_ISDIR(inode->i_mode)) 1942 ocfs2_add_links_count(orphan_fe, 1); 1943 orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe); 1944 1945 status = ocfs2_journal_dirty(handle, orphan_dir_bh); 1946 if (status < 0) { 1947 mlog_errno(status); 1948 goto leave; 1949 } 1950 1951 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 1952 OCFS2_ORPHAN_NAMELEN, inode, 1953 OCFS2_I(inode)->ip_blkno, 1954 orphan_dir_bh, lookup); 1955 if (status < 0) { 1956 mlog_errno(status); 1957 goto leave; 1958 } 1959 1960 le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL); 1961 1962 /* Record which orphan dir our inode now resides 1963 * in. delete_inode will use this to determine which orphan 1964 * dir to lock. */ 1965 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 1966 1967 mlog(0, "Inode %llu orphaned in slot %d\n", 1968 (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num); 1969 1970 leave: 1971 brelse(orphan_dir_bh); 1972 1973 mlog_exit(status); 1974 return status; 1975 } 1976 1977 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 1978 int ocfs2_orphan_del(struct ocfs2_super *osb, 1979 handle_t *handle, 1980 struct inode *orphan_dir_inode, 1981 struct inode *inode, 1982 struct buffer_head *orphan_dir_bh) 1983 { 1984 char name[OCFS2_ORPHAN_NAMELEN + 1]; 1985 struct ocfs2_dinode *orphan_fe; 1986 int status = 0; 1987 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1988 1989 mlog_entry_void(); 1990 1991 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 1992 if (status < 0) { 1993 mlog_errno(status); 1994 goto leave; 1995 } 1996 1997 mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n", 1998 name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 1999 OCFS2_ORPHAN_NAMELEN); 2000 2001 /* find it's spot in the orphan directory */ 2002 status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode, 2003 &lookup); 2004 if (status) { 2005 mlog_errno(status); 2006 goto leave; 2007 } 2008 2009 /* remove it from the orphan directory */ 2010 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); 2011 if (status < 0) { 2012 mlog_errno(status); 2013 goto leave; 2014 } 2015 2016 status = ocfs2_journal_access_di(handle, 2017 INODE_CACHE(orphan_dir_inode), 2018 orphan_dir_bh, 2019 OCFS2_JOURNAL_ACCESS_WRITE); 2020 if (status < 0) { 2021 mlog_errno(status); 2022 goto leave; 2023 } 2024 2025 /* do the i_nlink dance! :) */ 2026 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2027 if (S_ISDIR(inode->i_mode)) 2028 ocfs2_add_links_count(orphan_fe, -1); 2029 orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe); 2030 2031 status = ocfs2_journal_dirty(handle, orphan_dir_bh); 2032 if (status < 0) { 2033 mlog_errno(status); 2034 goto leave; 2035 } 2036 2037 leave: 2038 ocfs2_free_dir_lookup_result(&lookup); 2039 2040 mlog_exit(status); 2041 return status; 2042 } 2043 2044 int ocfs2_create_inode_in_orphan(struct inode *dir, 2045 int mode, 2046 struct inode **new_inode) 2047 { 2048 int status, did_quota_inode = 0; 2049 struct inode *inode = NULL; 2050 struct inode *orphan_dir = NULL; 2051 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2052 struct ocfs2_dinode *di = NULL; 2053 handle_t *handle = NULL; 2054 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2055 struct buffer_head *parent_di_bh = NULL; 2056 struct buffer_head *new_di_bh = NULL; 2057 struct ocfs2_alloc_context *inode_ac = NULL; 2058 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2059 2060 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2061 if (status < 0) { 2062 if (status != -ENOENT) 2063 mlog_errno(status); 2064 return status; 2065 } 2066 2067 /* 2068 * We give the orphan dir the root blkno to fake an orphan name, 2069 * and allocate enough space for our insertion. 2070 */ 2071 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 2072 osb->root_blkno, 2073 orphan_name, &orphan_insert); 2074 if (status < 0) { 2075 mlog_errno(status); 2076 goto leave; 2077 } 2078 2079 /* reserve an inode spot */ 2080 status = ocfs2_reserve_new_inode(osb, &inode_ac); 2081 if (status < 0) { 2082 if (status != -ENOSPC) 2083 mlog_errno(status); 2084 goto leave; 2085 } 2086 2087 inode = ocfs2_get_init_inode(dir, mode); 2088 if (!inode) { 2089 status = -ENOMEM; 2090 mlog_errno(status); 2091 goto leave; 2092 } 2093 2094 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2095 if (IS_ERR(handle)) { 2096 status = PTR_ERR(handle); 2097 handle = NULL; 2098 mlog_errno(status); 2099 goto leave; 2100 } 2101 2102 /* We don't use standard VFS wrapper because we don't want vfs_dq_init 2103 * to be called. */ 2104 if (sb_any_quota_active(osb->sb) && 2105 osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) { 2106 status = -EDQUOT; 2107 goto leave; 2108 } 2109 did_quota_inode = 1; 2110 2111 inode->i_nlink = 0; 2112 /* do the real work now. */ 2113 status = ocfs2_mknod_locked(osb, dir, inode, 2114 0, &new_di_bh, parent_di_bh, handle, 2115 inode_ac); 2116 if (status < 0) { 2117 mlog_errno(status); 2118 goto leave; 2119 } 2120 2121 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, orphan_name); 2122 if (status < 0) { 2123 mlog_errno(status); 2124 goto leave; 2125 } 2126 2127 di = (struct ocfs2_dinode *)new_di_bh->b_data; 2128 status = ocfs2_orphan_add(osb, handle, inode, di, orphan_name, 2129 &orphan_insert, orphan_dir); 2130 if (status < 0) { 2131 mlog_errno(status); 2132 goto leave; 2133 } 2134 2135 /* get open lock so that only nodes can't remove it from orphan dir. */ 2136 status = ocfs2_open_lock(inode); 2137 if (status < 0) 2138 mlog_errno(status); 2139 2140 insert_inode_hash(inode); 2141 leave: 2142 if (status < 0 && did_quota_inode) 2143 vfs_dq_free_inode(inode); 2144 if (handle) 2145 ocfs2_commit_trans(osb, handle); 2146 2147 if (orphan_dir) { 2148 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2149 ocfs2_inode_unlock(orphan_dir, 1); 2150 mutex_unlock(&orphan_dir->i_mutex); 2151 iput(orphan_dir); 2152 } 2153 2154 if (status == -ENOSPC) 2155 mlog(0, "Disk is full\n"); 2156 2157 if ((status < 0) && inode) { 2158 clear_nlink(inode); 2159 iput(inode); 2160 } 2161 2162 if (inode_ac) 2163 ocfs2_free_alloc_context(inode_ac); 2164 2165 brelse(new_di_bh); 2166 2167 if (!status) 2168 *new_inode = inode; 2169 2170 ocfs2_free_dir_lookup_result(&orphan_insert); 2171 2172 ocfs2_inode_unlock(dir, 1); 2173 brelse(parent_di_bh); 2174 return status; 2175 } 2176 2177 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2178 struct inode *inode, 2179 struct dentry *dentry) 2180 { 2181 int status = 0; 2182 struct buffer_head *parent_di_bh = NULL; 2183 handle_t *handle = NULL; 2184 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2185 struct ocfs2_dinode *dir_di, *di; 2186 struct inode *orphan_dir_inode = NULL; 2187 struct buffer_head *orphan_dir_bh = NULL; 2188 struct buffer_head *di_bh = NULL; 2189 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2190 2191 mlog_entry("(0x%p, 0x%p, %.*s')\n", dir, dentry, 2192 dentry->d_name.len, dentry->d_name.name); 2193 2194 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2195 if (status < 0) { 2196 if (status != -ENOENT) 2197 mlog_errno(status); 2198 return status; 2199 } 2200 2201 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2202 if (!dir_di->i_links_count) { 2203 /* can't make a file in a deleted directory. */ 2204 status = -ENOENT; 2205 goto leave; 2206 } 2207 2208 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2209 dentry->d_name.len); 2210 if (status) 2211 goto leave; 2212 2213 /* get a spot inside the dir. */ 2214 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2215 dentry->d_name.name, 2216 dentry->d_name.len, &lookup); 2217 if (status < 0) { 2218 mlog_errno(status); 2219 goto leave; 2220 } 2221 2222 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2223 ORPHAN_DIR_SYSTEM_INODE, 2224 osb->slot_num); 2225 if (!orphan_dir_inode) { 2226 status = -EEXIST; 2227 mlog_errno(status); 2228 goto leave; 2229 } 2230 2231 mutex_lock(&orphan_dir_inode->i_mutex); 2232 2233 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2234 if (status < 0) { 2235 mlog_errno(status); 2236 mutex_unlock(&orphan_dir_inode->i_mutex); 2237 iput(orphan_dir_inode); 2238 goto leave; 2239 } 2240 2241 status = ocfs2_read_inode_block(inode, &di_bh); 2242 if (status < 0) { 2243 mlog_errno(status); 2244 goto orphan_unlock; 2245 } 2246 2247 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2248 if (IS_ERR(handle)) { 2249 status = PTR_ERR(handle); 2250 handle = NULL; 2251 mlog_errno(status); 2252 goto orphan_unlock; 2253 } 2254 2255 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2256 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2257 if (status < 0) { 2258 mlog_errno(status); 2259 goto out_commit; 2260 } 2261 2262 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2263 orphan_dir_bh); 2264 if (status < 0) { 2265 mlog_errno(status); 2266 goto out_commit; 2267 } 2268 2269 di = (struct ocfs2_dinode *)di_bh->b_data; 2270 le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL); 2271 di->i_orphaned_slot = 0; 2272 inode->i_nlink = 1; 2273 ocfs2_set_links_count(di, inode->i_nlink); 2274 ocfs2_journal_dirty(handle, di_bh); 2275 2276 status = ocfs2_add_entry(handle, dentry, inode, 2277 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2278 &lookup); 2279 if (status < 0) { 2280 mlog_errno(status); 2281 goto out_commit; 2282 } 2283 2284 status = ocfs2_dentry_attach_lock(dentry, inode, 2285 OCFS2_I(dir)->ip_blkno); 2286 if (status) { 2287 mlog_errno(status); 2288 goto out_commit; 2289 } 2290 2291 dentry->d_op = &ocfs2_dentry_ops; 2292 d_instantiate(dentry, inode); 2293 status = 0; 2294 out_commit: 2295 ocfs2_commit_trans(osb, handle); 2296 orphan_unlock: 2297 ocfs2_inode_unlock(orphan_dir_inode, 1); 2298 mutex_unlock(&orphan_dir_inode->i_mutex); 2299 iput(orphan_dir_inode); 2300 leave: 2301 2302 ocfs2_inode_unlock(dir, 1); 2303 2304 brelse(di_bh); 2305 brelse(parent_di_bh); 2306 brelse(orphan_dir_bh); 2307 2308 ocfs2_free_dir_lookup_result(&lookup); 2309 2310 mlog_exit(status); 2311 2312 return status; 2313 } 2314 2315 const struct inode_operations ocfs2_dir_iops = { 2316 .create = ocfs2_create, 2317 .lookup = ocfs2_lookup, 2318 .link = ocfs2_link, 2319 .unlink = ocfs2_unlink, 2320 .rmdir = ocfs2_unlink, 2321 .symlink = ocfs2_symlink, 2322 .mkdir = ocfs2_mkdir, 2323 .mknod = ocfs2_mknod, 2324 .rename = ocfs2_rename, 2325 .setattr = ocfs2_setattr, 2326 .getattr = ocfs2_getattr, 2327 .permission = ocfs2_permission, 2328 .setxattr = generic_setxattr, 2329 .getxattr = generic_getxattr, 2330 .listxattr = ocfs2_listxattr, 2331 .removexattr = generic_removexattr, 2332 .fiemap = ocfs2_fiemap, 2333 }; 2334