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 44 #define MLOG_MASK_PREFIX ML_NAMEI 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 "vote.h" 64 65 #include "buffer_head_io.h" 66 67 #define NAMEI_RA_CHUNKS 2 68 #define NAMEI_RA_BLOCKS 4 69 #define NAMEI_RA_SIZE (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS) 70 #define NAMEI_RA_INDEX(c,b) (((c) * NAMEI_RA_BLOCKS) + (b)) 71 72 static int inline ocfs2_search_dirblock(struct buffer_head *bh, 73 struct inode *dir, 74 const char *name, int namelen, 75 unsigned long offset, 76 struct ocfs2_dir_entry **res_dir); 77 78 static int ocfs2_delete_entry(struct ocfs2_journal_handle *handle, 79 struct inode *dir, 80 struct ocfs2_dir_entry *de_del, 81 struct buffer_head *bh); 82 83 static int __ocfs2_add_entry(struct ocfs2_journal_handle *handle, 84 struct inode *dir, 85 const char *name, int namelen, 86 struct inode *inode, u64 blkno, 87 struct buffer_head *parent_fe_bh, 88 struct buffer_head *insert_bh); 89 90 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 91 struct inode *dir, 92 struct dentry *dentry, int mode, 93 dev_t dev, 94 struct buffer_head **new_fe_bh, 95 struct buffer_head *parent_fe_bh, 96 struct ocfs2_journal_handle *handle, 97 struct inode **ret_inode, 98 struct ocfs2_alloc_context *inode_ac); 99 100 static int ocfs2_fill_new_dir(struct ocfs2_super *osb, 101 struct ocfs2_journal_handle *handle, 102 struct inode *parent, 103 struct inode *inode, 104 struct buffer_head *fe_bh, 105 struct ocfs2_alloc_context *data_ac); 106 107 static int ocfs2_double_lock(struct ocfs2_super *osb, 108 struct ocfs2_journal_handle *handle, 109 struct buffer_head **bh1, 110 struct inode *inode1, 111 struct buffer_head **bh2, 112 struct inode *inode2); 113 114 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 115 struct ocfs2_journal_handle *handle, 116 struct inode *inode, 117 char *name, 118 struct buffer_head **de_bh); 119 120 static int ocfs2_orphan_add(struct ocfs2_super *osb, 121 struct ocfs2_journal_handle *handle, 122 struct inode *inode, 123 struct ocfs2_dinode *fe, 124 char *name, 125 struct buffer_head *de_bh); 126 127 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 128 struct ocfs2_journal_handle *handle, 129 struct inode *inode, 130 const char *symname); 131 132 static inline int ocfs2_add_entry(struct ocfs2_journal_handle *handle, 133 struct dentry *dentry, 134 struct inode *inode, u64 blkno, 135 struct buffer_head *parent_fe_bh, 136 struct buffer_head *insert_bh) 137 { 138 return __ocfs2_add_entry(handle, dentry->d_parent->d_inode, 139 dentry->d_name.name, dentry->d_name.len, 140 inode, blkno, parent_fe_bh, insert_bh); 141 } 142 143 /* An orphan dir name is an 8 byte value, printed as a hex string */ 144 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64))) 145 146 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, 147 struct nameidata *nd) 148 { 149 int status; 150 u64 blkno; 151 struct buffer_head *dirent_bh = NULL; 152 struct inode *inode = NULL; 153 struct dentry *ret; 154 struct ocfs2_dir_entry *dirent; 155 struct ocfs2_inode_info *oi; 156 157 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, 158 dentry->d_name.len, dentry->d_name.name); 159 160 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { 161 ret = ERR_PTR(-ENAMETOOLONG); 162 goto bail; 163 } 164 165 mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len, 166 dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno); 167 168 status = ocfs2_meta_lock(dir, NULL, NULL, 0); 169 if (status < 0) { 170 if (status != -ENOENT) 171 mlog_errno(status); 172 ret = ERR_PTR(status); 173 goto bail; 174 } 175 176 status = ocfs2_find_files_on_disk(dentry->d_name.name, 177 dentry->d_name.len, &blkno, 178 dir, &dirent_bh, &dirent); 179 if (status < 0) 180 goto bail_add; 181 182 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno); 183 if (IS_ERR(inode)) { 184 mlog(ML_ERROR, "Unable to create inode %llu\n", 185 (unsigned long long)blkno); 186 ret = ERR_PTR(-EACCES); 187 goto bail_unlock; 188 } 189 190 oi = OCFS2_I(inode); 191 /* Clear any orphaned state... If we were able to look up the 192 * inode from a directory, it certainly can't be orphaned. We 193 * might have the bad state from a node which intended to 194 * orphan this inode but crashed before it could commit the 195 * unlink. */ 196 spin_lock(&oi->ip_lock); 197 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; 198 oi->ip_orphaned_slot = OCFS2_INVALID_SLOT; 199 spin_unlock(&oi->ip_lock); 200 201 bail_add: 202 203 dentry->d_op = &ocfs2_dentry_ops; 204 ret = d_splice_alias(inode, dentry); 205 206 bail_unlock: 207 /* Don't drop the cluster lock until *after* the d_add -- 208 * unlink on another node will message us to remove that 209 * dentry under this lock so otherwise we can race this with 210 * the vote thread and have a stale dentry. */ 211 ocfs2_meta_unlock(dir, 0); 212 213 bail: 214 if (dirent_bh) 215 brelse(dirent_bh); 216 217 mlog_exit_ptr(ret); 218 219 return ret; 220 } 221 222 static int ocfs2_fill_new_dir(struct ocfs2_super *osb, 223 struct ocfs2_journal_handle *handle, 224 struct inode *parent, 225 struct inode *inode, 226 struct buffer_head *fe_bh, 227 struct ocfs2_alloc_context *data_ac) 228 { 229 int status; 230 struct buffer_head *new_bh = NULL; 231 struct ocfs2_dir_entry *de = NULL; 232 233 mlog_entry_void(); 234 235 status = ocfs2_do_extend_dir(osb->sb, handle, inode, fe_bh, 236 data_ac, NULL, &new_bh); 237 if (status < 0) { 238 mlog_errno(status); 239 goto bail; 240 } 241 242 ocfs2_set_new_buffer_uptodate(inode, new_bh); 243 244 status = ocfs2_journal_access(handle, inode, new_bh, 245 OCFS2_JOURNAL_ACCESS_CREATE); 246 if (status < 0) { 247 mlog_errno(status); 248 goto bail; 249 } 250 memset(new_bh->b_data, 0, osb->sb->s_blocksize); 251 252 de = (struct ocfs2_dir_entry *) new_bh->b_data; 253 de->inode = cpu_to_le64(OCFS2_I(inode)->ip_blkno); 254 de->name_len = 1; 255 de->rec_len = 256 cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len)); 257 strcpy(de->name, "."); 258 ocfs2_set_de_type(de, S_IFDIR); 259 de = (struct ocfs2_dir_entry *) ((char *)de + le16_to_cpu(de->rec_len)); 260 de->inode = cpu_to_le64(OCFS2_I(parent)->ip_blkno); 261 de->rec_len = cpu_to_le16(inode->i_sb->s_blocksize - 262 OCFS2_DIR_REC_LEN(1)); 263 de->name_len = 2; 264 strcpy(de->name, ".."); 265 ocfs2_set_de_type(de, S_IFDIR); 266 267 status = ocfs2_journal_dirty(handle, new_bh); 268 if (status < 0) { 269 mlog_errno(status); 270 goto bail; 271 } 272 273 i_size_write(inode, inode->i_sb->s_blocksize); 274 inode->i_nlink = 2; 275 inode->i_blocks = ocfs2_align_bytes_to_sectors(inode->i_sb->s_blocksize); 276 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); 277 if (status < 0) { 278 mlog_errno(status); 279 goto bail; 280 } 281 282 status = 0; 283 bail: 284 if (new_bh) 285 brelse(new_bh); 286 287 mlog_exit(status); 288 return status; 289 } 290 291 static int ocfs2_mknod(struct inode *dir, 292 struct dentry *dentry, 293 int mode, 294 dev_t dev) 295 { 296 int status = 0; 297 struct buffer_head *parent_fe_bh = NULL; 298 struct ocfs2_journal_handle *handle = NULL; 299 struct ocfs2_super *osb; 300 struct ocfs2_dinode *dirfe; 301 struct buffer_head *new_fe_bh = NULL; 302 struct buffer_head *de_bh = NULL; 303 struct inode *inode = NULL; 304 struct ocfs2_alloc_context *inode_ac = NULL; 305 struct ocfs2_alloc_context *data_ac = NULL; 306 307 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, 308 (unsigned long)dev, dentry->d_name.len, 309 dentry->d_name.name); 310 311 /* get our super block */ 312 osb = OCFS2_SB(dir->i_sb); 313 314 handle = ocfs2_alloc_handle(osb); 315 if (handle == NULL) { 316 status = -ENOMEM; 317 mlog_errno(status); 318 goto leave; 319 } 320 321 status = ocfs2_meta_lock(dir, handle, &parent_fe_bh, 1); 322 if (status < 0) { 323 if (status != -ENOENT) 324 mlog_errno(status); 325 goto leave; 326 } 327 328 if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) { 329 status = -EMLINK; 330 goto leave; 331 } 332 333 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 334 if (!dirfe->i_links_count) { 335 /* can't make a file in a deleted directory. */ 336 status = -ENOENT; 337 goto leave; 338 } 339 340 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 341 dentry->d_name.len); 342 if (status) 343 goto leave; 344 345 /* get a spot inside the dir. */ 346 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 347 dentry->d_name.name, 348 dentry->d_name.len, &de_bh); 349 if (status < 0) { 350 mlog_errno(status); 351 goto leave; 352 } 353 354 /* reserve an inode spot */ 355 status = ocfs2_reserve_new_inode(osb, handle, &inode_ac); 356 if (status < 0) { 357 if (status != -ENOSPC) 358 mlog_errno(status); 359 goto leave; 360 } 361 362 /* are we making a directory? If so, reserve a cluster for his 363 * 1st extent. */ 364 if (S_ISDIR(mode)) { 365 status = ocfs2_reserve_clusters(osb, handle, 1, &data_ac); 366 if (status < 0) { 367 if (status != -ENOSPC) 368 mlog_errno(status); 369 goto leave; 370 } 371 } 372 373 handle = ocfs2_start_trans(osb, handle, OCFS2_MKNOD_CREDITS); 374 if (IS_ERR(handle)) { 375 status = PTR_ERR(handle); 376 handle = NULL; 377 mlog_errno(status); 378 goto leave; 379 } 380 381 /* do the real work now. */ 382 status = ocfs2_mknod_locked(osb, dir, dentry, mode, dev, 383 &new_fe_bh, parent_fe_bh, handle, 384 &inode, inode_ac); 385 if (status < 0) { 386 mlog_errno(status); 387 goto leave; 388 } 389 390 if (S_ISDIR(mode)) { 391 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 392 new_fe_bh, data_ac); 393 if (status < 0) { 394 mlog_errno(status); 395 goto leave; 396 } 397 398 status = ocfs2_journal_access(handle, dir, parent_fe_bh, 399 OCFS2_JOURNAL_ACCESS_WRITE); 400 if (status < 0) { 401 mlog_errno(status); 402 goto leave; 403 } 404 le16_add_cpu(&dirfe->i_links_count, 1); 405 status = ocfs2_journal_dirty(handle, parent_fe_bh); 406 if (status < 0) { 407 mlog_errno(status); 408 goto leave; 409 } 410 dir->i_nlink++; 411 } 412 413 status = ocfs2_add_entry(handle, dentry, inode, 414 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 415 de_bh); 416 if (status < 0) { 417 mlog_errno(status); 418 goto leave; 419 } 420 421 insert_inode_hash(inode); 422 dentry->d_op = &ocfs2_dentry_ops; 423 d_instantiate(dentry, inode); 424 status = 0; 425 leave: 426 if (handle) 427 ocfs2_commit_trans(handle); 428 429 if (status == -ENOSPC) 430 mlog(0, "Disk is full\n"); 431 432 if (new_fe_bh) 433 brelse(new_fe_bh); 434 435 if (de_bh) 436 brelse(de_bh); 437 438 if (parent_fe_bh) 439 brelse(parent_fe_bh); 440 441 if ((status < 0) && inode) 442 iput(inode); 443 444 if (inode_ac) 445 ocfs2_free_alloc_context(inode_ac); 446 447 if (data_ac) 448 ocfs2_free_alloc_context(data_ac); 449 450 mlog_exit(status); 451 452 return status; 453 } 454 455 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 456 struct inode *dir, 457 struct dentry *dentry, int mode, 458 dev_t dev, 459 struct buffer_head **new_fe_bh, 460 struct buffer_head *parent_fe_bh, 461 struct ocfs2_journal_handle *handle, 462 struct inode **ret_inode, 463 struct ocfs2_alloc_context *inode_ac) 464 { 465 int status = 0; 466 struct ocfs2_dinode *fe = NULL; 467 struct ocfs2_extent_list *fel; 468 u64 fe_blkno = 0; 469 u16 suballoc_bit; 470 struct inode *inode = NULL; 471 472 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, 473 (unsigned long)dev, dentry->d_name.len, 474 dentry->d_name.name); 475 476 *new_fe_bh = NULL; 477 *ret_inode = NULL; 478 479 status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit, 480 &fe_blkno); 481 if (status < 0) { 482 mlog_errno(status); 483 goto leave; 484 } 485 486 inode = new_inode(dir->i_sb); 487 if (IS_ERR(inode)) { 488 status = PTR_ERR(inode); 489 mlog(ML_ERROR, "new_inode failed!\n"); 490 goto leave; 491 } 492 493 /* populate as many fields early on as possible - many of 494 * these are used by the support functions here and in 495 * callers. */ 496 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 497 OCFS2_I(inode)->ip_blkno = fe_blkno; 498 if (S_ISDIR(mode)) 499 inode->i_nlink = 2; 500 else 501 inode->i_nlink = 1; 502 inode->i_mode = mode; 503 spin_lock(&osb->osb_lock); 504 inode->i_generation = osb->s_next_generation++; 505 spin_unlock(&osb->osb_lock); 506 507 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 508 if (!*new_fe_bh) { 509 status = -EIO; 510 mlog_errno(status); 511 goto leave; 512 } 513 ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh); 514 515 status = ocfs2_journal_access(handle, inode, *new_fe_bh, 516 OCFS2_JOURNAL_ACCESS_CREATE); 517 if (status < 0) { 518 mlog_errno(status); 519 goto leave; 520 } 521 522 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 523 memset(fe, 0, osb->sb->s_blocksize); 524 525 fe->i_generation = cpu_to_le32(inode->i_generation); 526 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 527 fe->i_blkno = cpu_to_le64(fe_blkno); 528 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 529 fe->i_suballoc_slot = cpu_to_le16(osb->slot_num); 530 fe->i_uid = cpu_to_le32(current->fsuid); 531 if (dir->i_mode & S_ISGID) { 532 fe->i_gid = cpu_to_le32(dir->i_gid); 533 if (S_ISDIR(mode)) 534 mode |= S_ISGID; 535 } else 536 fe->i_gid = cpu_to_le32(current->fsgid); 537 fe->i_mode = cpu_to_le16(mode); 538 if (S_ISCHR(mode) || S_ISBLK(mode)) 539 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 540 541 fe->i_links_count = cpu_to_le16(inode->i_nlink); 542 543 fe->i_last_eb_blk = 0; 544 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 545 le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL); 546 fe->i_atime = fe->i_ctime = fe->i_mtime = 547 cpu_to_le64(CURRENT_TIME.tv_sec); 548 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 549 cpu_to_le32(CURRENT_TIME.tv_nsec); 550 fe->i_dtime = 0; 551 552 fel = &fe->id2.i_list; 553 fel->l_tree_depth = 0; 554 fel->l_next_free_rec = 0; 555 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 556 557 status = ocfs2_journal_dirty(handle, *new_fe_bh); 558 if (status < 0) { 559 mlog_errno(status); 560 goto leave; 561 } 562 563 if (ocfs2_populate_inode(inode, fe, 1) < 0) { 564 mlog(ML_ERROR, "populate inode failed! bh->b_blocknr=%llu, " 565 "i_blkno=%llu, i_ino=%lu\n", 566 (unsigned long long) (*new_fe_bh)->b_blocknr, 567 (unsigned long long)fe->i_blkno, inode->i_ino); 568 BUG(); 569 } 570 571 ocfs2_inode_set_new(osb, inode); 572 status = ocfs2_create_new_inode_locks(inode); 573 if (status < 0) 574 mlog_errno(status); 575 576 status = 0; /* error in ocfs2_create_new_inode_locks is not 577 * critical */ 578 579 *ret_inode = inode; 580 leave: 581 if (status < 0) { 582 if (*new_fe_bh) { 583 brelse(*new_fe_bh); 584 *new_fe_bh = NULL; 585 } 586 if (inode) 587 iput(inode); 588 } 589 590 mlog_exit(status); 591 return status; 592 } 593 594 static int ocfs2_mkdir(struct inode *dir, 595 struct dentry *dentry, 596 int mode) 597 { 598 int ret; 599 600 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, 601 dentry->d_name.len, dentry->d_name.name); 602 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); 603 mlog_exit(ret); 604 605 return ret; 606 } 607 608 static int ocfs2_create(struct inode *dir, 609 struct dentry *dentry, 610 int mode, 611 struct nameidata *nd) 612 { 613 int ret; 614 615 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, 616 dentry->d_name.len, dentry->d_name.name); 617 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); 618 mlog_exit(ret); 619 620 return ret; 621 } 622 623 static int ocfs2_link(struct dentry *old_dentry, 624 struct inode *dir, 625 struct dentry *dentry) 626 { 627 struct ocfs2_journal_handle *handle = NULL; 628 struct inode *inode = old_dentry->d_inode; 629 int err; 630 struct buffer_head *fe_bh = NULL; 631 struct buffer_head *parent_fe_bh = NULL; 632 struct buffer_head *de_bh = NULL; 633 struct ocfs2_dinode *fe = NULL; 634 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 635 636 mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino, 637 old_dentry->d_name.len, old_dentry->d_name.name, 638 dentry->d_name.len, dentry->d_name.name); 639 640 if (S_ISDIR(inode->i_mode)) { 641 err = -EPERM; 642 goto bail; 643 } 644 645 handle = ocfs2_alloc_handle(osb); 646 if (handle == NULL) { 647 err = -ENOMEM; 648 goto bail; 649 } 650 651 err = ocfs2_meta_lock(dir, handle, &parent_fe_bh, 1); 652 if (err < 0) { 653 if (err != -ENOENT) 654 mlog_errno(err); 655 goto bail; 656 } 657 658 if (!dir->i_nlink) { 659 err = -ENOENT; 660 goto bail; 661 } 662 663 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 664 dentry->d_name.len); 665 if (err) 666 goto bail; 667 668 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 669 dentry->d_name.name, 670 dentry->d_name.len, &de_bh); 671 if (err < 0) { 672 mlog_errno(err); 673 goto bail; 674 } 675 676 err = ocfs2_meta_lock(inode, handle, &fe_bh, 1); 677 if (err < 0) { 678 if (err != -ENOENT) 679 mlog_errno(err); 680 goto bail; 681 } 682 683 fe = (struct ocfs2_dinode *) fe_bh->b_data; 684 if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) { 685 err = -EMLINK; 686 goto bail; 687 } 688 689 handle = ocfs2_start_trans(osb, handle, OCFS2_LINK_CREDITS); 690 if (IS_ERR(handle)) { 691 err = PTR_ERR(handle); 692 handle = NULL; 693 mlog_errno(err); 694 goto bail; 695 } 696 697 err = ocfs2_journal_access(handle, inode, fe_bh, 698 OCFS2_JOURNAL_ACCESS_WRITE); 699 if (err < 0) { 700 mlog_errno(err); 701 goto bail; 702 } 703 704 inode->i_nlink++; 705 inode->i_ctime = CURRENT_TIME; 706 fe->i_links_count = cpu_to_le16(inode->i_nlink); 707 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 708 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 709 710 err = ocfs2_journal_dirty(handle, fe_bh); 711 if (err < 0) { 712 le16_add_cpu(&fe->i_links_count, -1); 713 inode->i_nlink--; 714 mlog_errno(err); 715 goto bail; 716 } 717 718 err = ocfs2_add_entry(handle, dentry, inode, 719 OCFS2_I(inode)->ip_blkno, 720 parent_fe_bh, de_bh); 721 if (err) { 722 le16_add_cpu(&fe->i_links_count, -1); 723 inode->i_nlink--; 724 mlog_errno(err); 725 goto bail; 726 } 727 728 atomic_inc(&inode->i_count); 729 dentry->d_op = &ocfs2_dentry_ops; 730 d_instantiate(dentry, inode); 731 bail: 732 if (handle) 733 ocfs2_commit_trans(handle); 734 if (de_bh) 735 brelse(de_bh); 736 if (fe_bh) 737 brelse(fe_bh); 738 if (parent_fe_bh) 739 brelse(parent_fe_bh); 740 741 mlog_exit(err); 742 743 return err; 744 } 745 746 static int ocfs2_unlink(struct inode *dir, 747 struct dentry *dentry) 748 { 749 int status; 750 unsigned int saved_nlink = 0; 751 struct inode *inode = dentry->d_inode; 752 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 753 u64 blkno; 754 struct ocfs2_dinode *fe = NULL; 755 struct buffer_head *fe_bh = NULL; 756 struct buffer_head *parent_node_bh = NULL; 757 struct ocfs2_journal_handle *handle = NULL; 758 struct ocfs2_dir_entry *dirent = NULL; 759 struct buffer_head *dirent_bh = NULL; 760 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 761 struct buffer_head *orphan_entry_bh = NULL; 762 763 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, 764 dentry->d_name.len, dentry->d_name.name); 765 766 BUG_ON(dentry->d_parent->d_inode != dir); 767 768 mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno); 769 770 if (inode == osb->root_inode) { 771 mlog(0, "Cannot delete the root directory\n"); 772 status = -EPERM; 773 goto leave; 774 } 775 776 handle = ocfs2_alloc_handle(osb); 777 if (handle == NULL) { 778 status = -ENOMEM; 779 mlog_errno(status); 780 goto leave; 781 } 782 783 status = ocfs2_meta_lock(dir, handle, &parent_node_bh, 1); 784 if (status < 0) { 785 if (status != -ENOENT) 786 mlog_errno(status); 787 goto leave; 788 } 789 790 status = ocfs2_find_files_on_disk(dentry->d_name.name, 791 dentry->d_name.len, &blkno, 792 dir, &dirent_bh, &dirent); 793 if (status < 0) { 794 if (status != -ENOENT) 795 mlog_errno(status); 796 goto leave; 797 } 798 799 if (OCFS2_I(inode)->ip_blkno != blkno) { 800 status = -ENOENT; 801 802 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n", 803 (unsigned long long)OCFS2_I(inode)->ip_blkno, 804 (unsigned long long)blkno, OCFS2_I(inode)->ip_flags); 805 goto leave; 806 } 807 808 status = ocfs2_meta_lock(inode, handle, &fe_bh, 1); 809 if (status < 0) { 810 if (status != -ENOENT) 811 mlog_errno(status); 812 goto leave; 813 } 814 815 if (S_ISDIR(inode->i_mode)) { 816 if (!ocfs2_empty_dir(inode)) { 817 status = -ENOTEMPTY; 818 goto leave; 819 } else if (inode->i_nlink != 2) { 820 status = -ENOTEMPTY; 821 goto leave; 822 } 823 } 824 825 /* There are still a few steps left until we can consider the 826 * unlink to have succeeded. Save off nlink here before 827 * modification so we can set it back in case we hit an issue 828 * before commit. */ 829 saved_nlink = inode->i_nlink; 830 if (S_ISDIR(inode->i_mode)) 831 inode->i_nlink = 0; 832 else 833 inode->i_nlink--; 834 835 status = ocfs2_request_unlink_vote(inode, dentry, 836 (unsigned int) inode->i_nlink); 837 if (status < 0) { 838 /* This vote should succeed under all normal 839 * circumstances. */ 840 mlog_errno(status); 841 goto leave; 842 } 843 844 if (!inode->i_nlink) { 845 status = ocfs2_prepare_orphan_dir(osb, handle, inode, 846 orphan_name, 847 &orphan_entry_bh); 848 if (status < 0) { 849 mlog_errno(status); 850 goto leave; 851 } 852 } 853 854 handle = ocfs2_start_trans(osb, handle, OCFS2_UNLINK_CREDITS); 855 if (IS_ERR(handle)) { 856 status = PTR_ERR(handle); 857 handle = NULL; 858 mlog_errno(status); 859 goto leave; 860 } 861 862 status = ocfs2_journal_access(handle, inode, fe_bh, 863 OCFS2_JOURNAL_ACCESS_WRITE); 864 if (status < 0) { 865 mlog_errno(status); 866 goto leave; 867 } 868 869 fe = (struct ocfs2_dinode *) fe_bh->b_data; 870 871 if (!inode->i_nlink) { 872 status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name, 873 orphan_entry_bh); 874 if (status < 0) { 875 mlog_errno(status); 876 goto leave; 877 } 878 } 879 880 /* delete the name from the parent dir */ 881 status = ocfs2_delete_entry(handle, dir, dirent, dirent_bh); 882 if (status < 0) { 883 mlog_errno(status); 884 goto leave; 885 } 886 887 /* We can set nlink on the dinode now. clear the saved version 888 * so that it doesn't get set later. */ 889 fe->i_links_count = cpu_to_le16(inode->i_nlink); 890 saved_nlink = 0; 891 892 status = ocfs2_journal_dirty(handle, fe_bh); 893 if (status < 0) { 894 mlog_errno(status); 895 goto leave; 896 } 897 898 if (S_ISDIR(inode->i_mode)) { 899 dir->i_nlink--; 900 status = ocfs2_mark_inode_dirty(handle, dir, 901 parent_node_bh); 902 if (status < 0) { 903 mlog_errno(status); 904 dir->i_nlink++; 905 } 906 } 907 908 leave: 909 if (status < 0 && saved_nlink) 910 inode->i_nlink = saved_nlink; 911 912 if (handle) 913 ocfs2_commit_trans(handle); 914 915 if (fe_bh) 916 brelse(fe_bh); 917 918 if (dirent_bh) 919 brelse(dirent_bh); 920 921 if (parent_node_bh) 922 brelse(parent_node_bh); 923 924 if (orphan_entry_bh) 925 brelse(orphan_entry_bh); 926 927 mlog_exit(status); 928 929 return status; 930 } 931 932 /* 933 * The only place this should be used is rename! 934 * if they have the same id, then the 1st one is the only one locked. 935 */ 936 static int ocfs2_double_lock(struct ocfs2_super *osb, 937 struct ocfs2_journal_handle *handle, 938 struct buffer_head **bh1, 939 struct inode *inode1, 940 struct buffer_head **bh2, 941 struct inode *inode2) 942 { 943 int status; 944 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 945 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 946 struct buffer_head **tmpbh; 947 struct inode *tmpinode; 948 949 mlog_entry("(inode1 = %llu, inode2 = %llu)\n", 950 (unsigned long long)oi1->ip_blkno, 951 (unsigned long long)oi2->ip_blkno); 952 953 BUG_ON(!handle); 954 955 if (*bh1) 956 *bh1 = NULL; 957 if (*bh2) 958 *bh2 = NULL; 959 960 /* we always want to lock the one with the lower lockid first. */ 961 if (oi1->ip_blkno != oi2->ip_blkno) { 962 if (oi1->ip_blkno < oi2->ip_blkno) { 963 /* switch id1 and id2 around */ 964 mlog(0, "switching them around...\n"); 965 tmpbh = bh2; 966 bh2 = bh1; 967 bh1 = tmpbh; 968 969 tmpinode = inode2; 970 inode2 = inode1; 971 inode1 = tmpinode; 972 } 973 /* lock id2 */ 974 status = ocfs2_meta_lock(inode2, handle, bh2, 1); 975 if (status < 0) { 976 if (status != -ENOENT) 977 mlog_errno(status); 978 goto bail; 979 } 980 } 981 /* lock id1 */ 982 status = ocfs2_meta_lock(inode1, handle, bh1, 1); 983 if (status < 0) { 984 if (status != -ENOENT) 985 mlog_errno(status); 986 goto bail; 987 } 988 bail: 989 mlog_exit(status); 990 return status; 991 } 992 993 #define PARENT_INO(buffer) \ 994 ((struct ocfs2_dir_entry *) \ 995 ((char *)buffer + \ 996 le16_to_cpu(((struct ocfs2_dir_entry *)buffer)->rec_len)))->inode 997 998 static int ocfs2_rename(struct inode *old_dir, 999 struct dentry *old_dentry, 1000 struct inode *new_dir, 1001 struct dentry *new_dentry) 1002 { 1003 int status = 0, rename_lock = 0; 1004 struct inode *old_inode = old_dentry->d_inode; 1005 struct inode *new_inode = new_dentry->d_inode; 1006 struct ocfs2_dinode *newfe = NULL; 1007 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1008 struct buffer_head *orphan_entry_bh = NULL; 1009 struct buffer_head *newfe_bh = NULL; 1010 struct buffer_head *insert_entry_bh = NULL; 1011 struct ocfs2_super *osb = NULL; 1012 u64 newfe_blkno; 1013 struct ocfs2_journal_handle *handle = NULL; 1014 struct buffer_head *old_dir_bh = NULL; 1015 struct buffer_head *new_dir_bh = NULL; 1016 struct ocfs2_dir_entry *old_de = NULL, *new_de = NULL; // dirent for old_dentry 1017 // and new_dentry 1018 struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above 1019 struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir, 1020 // this is the 1st dirent bh 1021 nlink_t old_dir_nlink = old_dir->i_nlink, new_dir_nlink = new_dir->i_nlink; 1022 unsigned int links_count; 1023 1024 /* At some point it might be nice to break this function up a 1025 * bit. */ 1026 1027 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n", 1028 old_dir, old_dentry, new_dir, new_dentry, 1029 old_dentry->d_name.len, old_dentry->d_name.name, 1030 new_dentry->d_name.len, new_dentry->d_name.name); 1031 1032 osb = OCFS2_SB(old_dir->i_sb); 1033 1034 if (new_inode) { 1035 if (!igrab(new_inode)) 1036 BUG(); 1037 } 1038 1039 if (atomic_read(&old_dentry->d_count) > 2) { 1040 shrink_dcache_parent(old_dentry); 1041 if (atomic_read(&old_dentry->d_count) > 2) { 1042 status = -EBUSY; 1043 goto bail; 1044 } 1045 } 1046 1047 /* Assume a directory heirarchy thusly: 1048 * a/b/c 1049 * a/d 1050 * a,b,c, and d are all directories. 1051 * 1052 * from cwd of 'a' on both nodes: 1053 * node1: mv b/c d 1054 * node2: mv d b/c 1055 * 1056 * And that's why, just like the VFS, we need a file system 1057 * rename lock. */ 1058 if (old_dentry != new_dentry) { 1059 status = ocfs2_rename_lock(osb); 1060 if (status < 0) { 1061 mlog_errno(status); 1062 goto bail; 1063 } 1064 rename_lock = 1; 1065 } 1066 1067 handle = ocfs2_alloc_handle(osb); 1068 if (handle == NULL) { 1069 status = -ENOMEM; 1070 mlog_errno(status); 1071 goto bail; 1072 } 1073 1074 /* if old and new are the same, this'll just do one lock. */ 1075 status = ocfs2_double_lock(osb, handle, 1076 &old_dir_bh, old_dir, 1077 &new_dir_bh, new_dir); 1078 if (status < 0) { 1079 mlog_errno(status); 1080 goto bail; 1081 } 1082 1083 /* make sure both dirs have bhs 1084 * get an extra ref on old_dir_bh if old==new */ 1085 if (!new_dir_bh) { 1086 if (old_dir_bh) { 1087 new_dir_bh = old_dir_bh; 1088 get_bh(new_dir_bh); 1089 } else { 1090 mlog(ML_ERROR, "no old_dir_bh!\n"); 1091 status = -EIO; 1092 goto bail; 1093 } 1094 } 1095 1096 if (S_ISDIR(old_inode->i_mode)) { 1097 /* Directories actually require metadata updates to 1098 * the directory info so we can't get away with not 1099 * doing node locking on it. */ 1100 status = ocfs2_meta_lock(old_inode, handle, NULL, 1); 1101 if (status < 0) { 1102 if (status != -ENOENT) 1103 mlog_errno(status); 1104 goto bail; 1105 } 1106 1107 status = ocfs2_request_rename_vote(old_inode, old_dentry); 1108 if (status < 0) { 1109 mlog_errno(status); 1110 goto bail; 1111 } 1112 1113 status = -EIO; 1114 old_inode_de_bh = ocfs2_bread(old_inode, 0, &status, 0); 1115 if (!old_inode_de_bh) 1116 goto bail; 1117 1118 status = -EIO; 1119 if (le64_to_cpu(PARENT_INO(old_inode_de_bh->b_data)) != 1120 OCFS2_I(old_dir)->ip_blkno) 1121 goto bail; 1122 status = -EMLINK; 1123 if (!new_inode && new_dir!=old_dir && 1124 new_dir->i_nlink >= OCFS2_LINK_MAX) 1125 goto bail; 1126 } else { 1127 /* Ah, the simple case - we're a file so just send a 1128 * message. */ 1129 status = ocfs2_request_rename_vote(old_inode, old_dentry); 1130 if (status < 0) { 1131 mlog_errno(status); 1132 goto bail; 1133 } 1134 } 1135 1136 status = -ENOENT; 1137 old_de_bh = ocfs2_find_entry(old_dentry->d_name.name, 1138 old_dentry->d_name.len, 1139 old_dir, &old_de); 1140 if (!old_de_bh) 1141 goto bail; 1142 1143 /* 1144 * Check for inode number is _not_ due to possible IO errors. 1145 * We might rmdir the source, keep it as pwd of some process 1146 * and merrily kill the link to whatever was created under the 1147 * same name. Goodbye sticky bit ;-< 1148 */ 1149 if (le64_to_cpu(old_de->inode) != OCFS2_I(old_inode)->ip_blkno) 1150 goto bail; 1151 1152 /* check if the target already exists (in which case we need 1153 * to delete it */ 1154 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1155 new_dentry->d_name.len, 1156 &newfe_blkno, new_dir, &new_de_bh, 1157 &new_de); 1158 /* The only error we allow here is -ENOENT because the new 1159 * file not existing is perfectly valid. */ 1160 if ((status < 0) && (status != -ENOENT)) { 1161 /* If we cannot find the file specified we should just */ 1162 /* return the error... */ 1163 mlog_errno(status); 1164 goto bail; 1165 } 1166 1167 if (!new_de && new_inode) 1168 mlog(ML_ERROR, "inode %lu does not exist in it's parent " 1169 "directory!", new_inode->i_ino); 1170 1171 /* In case we need to overwrite an existing file, we blow it 1172 * away first */ 1173 if (new_de) { 1174 /* VFS didn't think there existed an inode here, but 1175 * someone else in the cluster must have raced our 1176 * rename to create one. Today we error cleanly, in 1177 * the future we should consider calling iget to build 1178 * a new struct inode for this entry. */ 1179 if (!new_inode) { 1180 status = -EACCES; 1181 1182 mlog(0, "We found an inode for name %.*s but VFS " 1183 "didn't give us one.\n", new_dentry->d_name.len, 1184 new_dentry->d_name.name); 1185 goto bail; 1186 } 1187 1188 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1189 status = -EACCES; 1190 1191 mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n", 1192 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1193 (unsigned long long)newfe_blkno, 1194 OCFS2_I(new_inode)->ip_flags); 1195 goto bail; 1196 } 1197 1198 status = ocfs2_meta_lock(new_inode, handle, &newfe_bh, 1); 1199 if (status < 0) { 1200 if (status != -ENOENT) 1201 mlog_errno(status); 1202 goto bail; 1203 } 1204 1205 if (S_ISDIR(new_inode->i_mode)) 1206 links_count = 0; 1207 else 1208 links_count = (unsigned int) (new_inode->i_nlink - 1); 1209 1210 status = ocfs2_request_unlink_vote(new_inode, new_dentry, 1211 links_count); 1212 if (status < 0) { 1213 mlog_errno(status); 1214 goto bail; 1215 } 1216 1217 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1218 1219 mlog(0, "aha rename over existing... new_de=%p new_blkno=%llu " 1220 "newfebh=%p bhblocknr=%llu\n", new_de, 1221 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1222 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1223 1224 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1225 status = ocfs2_prepare_orphan_dir(osb, handle, 1226 new_inode, 1227 orphan_name, 1228 &orphan_entry_bh); 1229 if (status < 0) { 1230 mlog_errno(status); 1231 goto bail; 1232 } 1233 } 1234 } else { 1235 BUG_ON(new_dentry->d_parent->d_inode != new_dir); 1236 1237 status = ocfs2_check_dir_for_entry(new_dir, 1238 new_dentry->d_name.name, 1239 new_dentry->d_name.len); 1240 if (status) 1241 goto bail; 1242 1243 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1244 new_dentry->d_name.name, 1245 new_dentry->d_name.len, 1246 &insert_entry_bh); 1247 if (status < 0) { 1248 mlog_errno(status); 1249 goto bail; 1250 } 1251 } 1252 1253 handle = ocfs2_start_trans(osb, handle, OCFS2_RENAME_CREDITS); 1254 if (IS_ERR(handle)) { 1255 status = PTR_ERR(handle); 1256 handle = NULL; 1257 mlog_errno(status); 1258 goto bail; 1259 } 1260 1261 if (new_de) { 1262 if (S_ISDIR(new_inode->i_mode)) { 1263 if (!ocfs2_empty_dir(new_inode) || 1264 new_inode->i_nlink != 2) { 1265 status = -ENOTEMPTY; 1266 goto bail; 1267 } 1268 } 1269 status = ocfs2_journal_access(handle, new_inode, newfe_bh, 1270 OCFS2_JOURNAL_ACCESS_WRITE); 1271 if (status < 0) { 1272 mlog_errno(status); 1273 goto bail; 1274 } 1275 1276 if (S_ISDIR(new_inode->i_mode) || 1277 (newfe->i_links_count == cpu_to_le16(1))){ 1278 status = ocfs2_orphan_add(osb, handle, new_inode, 1279 newfe, orphan_name, 1280 orphan_entry_bh); 1281 if (status < 0) { 1282 mlog_errno(status); 1283 goto bail; 1284 } 1285 } 1286 1287 /* change the dirent to point to the correct inode */ 1288 status = ocfs2_journal_access(handle, new_dir, new_de_bh, 1289 OCFS2_JOURNAL_ACCESS_WRITE); 1290 if (status < 0) { 1291 mlog_errno(status); 1292 goto bail; 1293 } 1294 new_de->inode = cpu_to_le64(OCFS2_I(old_inode)->ip_blkno); 1295 new_de->file_type = old_de->file_type; 1296 new_dir->i_version++; 1297 status = ocfs2_journal_dirty(handle, new_de_bh); 1298 if (status < 0) { 1299 mlog_errno(status); 1300 goto bail; 1301 } 1302 1303 if (S_ISDIR(new_inode->i_mode)) 1304 newfe->i_links_count = 0; 1305 else 1306 le16_add_cpu(&newfe->i_links_count, -1); 1307 1308 status = ocfs2_journal_dirty(handle, newfe_bh); 1309 if (status < 0) { 1310 mlog_errno(status); 1311 goto bail; 1312 } 1313 } else { 1314 /* if the name was not found in new_dir, add it now */ 1315 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1316 OCFS2_I(old_inode)->ip_blkno, 1317 new_dir_bh, insert_entry_bh); 1318 } 1319 1320 old_inode->i_ctime = CURRENT_TIME; 1321 mark_inode_dirty(old_inode); 1322 1323 /* now that the name has been added to new_dir, remove the old name */ 1324 status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh); 1325 if (status < 0) { 1326 mlog_errno(status); 1327 goto bail; 1328 } 1329 1330 if (new_inode) { 1331 new_inode->i_nlink--; 1332 new_inode->i_ctime = CURRENT_TIME; 1333 } 1334 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; 1335 if (old_inode_de_bh) { 1336 status = ocfs2_journal_access(handle, old_inode, 1337 old_inode_de_bh, 1338 OCFS2_JOURNAL_ACCESS_WRITE); 1339 PARENT_INO(old_inode_de_bh->b_data) = 1340 cpu_to_le64(OCFS2_I(new_dir)->ip_blkno); 1341 status = ocfs2_journal_dirty(handle, old_inode_de_bh); 1342 old_dir->i_nlink--; 1343 if (new_inode) { 1344 new_inode->i_nlink--; 1345 } else { 1346 new_dir->i_nlink++; 1347 mark_inode_dirty(new_dir); 1348 } 1349 } 1350 mark_inode_dirty(old_dir); 1351 if (new_inode) 1352 mark_inode_dirty(new_inode); 1353 1354 if (old_dir != new_dir) 1355 if (new_dir_nlink != new_dir->i_nlink) { 1356 if (!new_dir_bh) { 1357 mlog(ML_ERROR, "need to change nlink for new " 1358 "dir %llu from %d to %d but bh is NULL\n", 1359 (unsigned long long)OCFS2_I(new_dir)->ip_blkno, 1360 (int)new_dir_nlink, new_dir->i_nlink); 1361 } else { 1362 struct ocfs2_dinode *fe; 1363 status = ocfs2_journal_access(handle, 1364 new_dir, 1365 new_dir_bh, 1366 OCFS2_JOURNAL_ACCESS_WRITE); 1367 fe = (struct ocfs2_dinode *) new_dir_bh->b_data; 1368 fe->i_links_count = cpu_to_le16(new_dir->i_nlink); 1369 status = ocfs2_journal_dirty(handle, new_dir_bh); 1370 } 1371 } 1372 1373 if (old_dir_nlink != old_dir->i_nlink) { 1374 if (!old_dir_bh) { 1375 mlog(ML_ERROR, "need to change nlink for old dir " 1376 "%llu from %d to %d but bh is NULL!\n", 1377 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1378 (int)old_dir_nlink, old_dir->i_nlink); 1379 } else { 1380 struct ocfs2_dinode *fe; 1381 status = ocfs2_journal_access(handle, old_dir, 1382 old_dir_bh, 1383 OCFS2_JOURNAL_ACCESS_WRITE); 1384 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1385 fe->i_links_count = cpu_to_le16(old_dir->i_nlink); 1386 status = ocfs2_journal_dirty(handle, old_dir_bh); 1387 } 1388 } 1389 1390 status = 0; 1391 bail: 1392 if (rename_lock) 1393 ocfs2_rename_unlock(osb); 1394 1395 if (handle) 1396 ocfs2_commit_trans(handle); 1397 1398 if (new_inode) 1399 sync_mapping_buffers(old_inode->i_mapping); 1400 1401 if (new_inode) 1402 iput(new_inode); 1403 if (newfe_bh) 1404 brelse(newfe_bh); 1405 if (old_dir_bh) 1406 brelse(old_dir_bh); 1407 if (new_dir_bh) 1408 brelse(new_dir_bh); 1409 if (new_de_bh) 1410 brelse(new_de_bh); 1411 if (old_de_bh) 1412 brelse(old_de_bh); 1413 if (old_inode_de_bh) 1414 brelse(old_inode_de_bh); 1415 if (orphan_entry_bh) 1416 brelse(orphan_entry_bh); 1417 if (insert_entry_bh) 1418 brelse(insert_entry_bh); 1419 1420 mlog_exit(status); 1421 1422 return status; 1423 } 1424 1425 /* 1426 * we expect i_size = strlen(symname). Copy symname into the file 1427 * data, including the null terminator. 1428 */ 1429 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1430 struct ocfs2_journal_handle *handle, 1431 struct inode *inode, 1432 const char *symname) 1433 { 1434 struct buffer_head **bhs = NULL; 1435 const char *c; 1436 struct super_block *sb = osb->sb; 1437 u64 p_blkno; 1438 int p_blocks; 1439 int virtual, blocks, status, i, bytes_left; 1440 1441 bytes_left = i_size_read(inode) + 1; 1442 /* we can't trust i_blocks because we're actually going to 1443 * write i_size + 1 bytes. */ 1444 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1445 1446 mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n", 1447 (unsigned long long)inode->i_blocks, 1448 i_size_read(inode), blocks); 1449 1450 /* Sanity check -- make sure we're going to fit. */ 1451 if (bytes_left > 1452 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1453 status = -EIO; 1454 mlog_errno(status); 1455 goto bail; 1456 } 1457 1458 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1459 if (!bhs) { 1460 status = -ENOMEM; 1461 mlog_errno(status); 1462 goto bail; 1463 } 1464 1465 status = ocfs2_extent_map_get_blocks(inode, 0, 1, &p_blkno, 1466 &p_blocks); 1467 if (status < 0) { 1468 mlog_errno(status); 1469 goto bail; 1470 } 1471 1472 /* links can never be larger than one cluster so we know this 1473 * is all going to be contiguous, but do a sanity check 1474 * anyway. */ 1475 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1476 status = -EIO; 1477 mlog_errno(status); 1478 goto bail; 1479 } 1480 1481 virtual = 0; 1482 while(bytes_left > 0) { 1483 c = &symname[virtual * sb->s_blocksize]; 1484 1485 bhs[virtual] = sb_getblk(sb, p_blkno); 1486 if (!bhs[virtual]) { 1487 status = -ENOMEM; 1488 mlog_errno(status); 1489 goto bail; 1490 } 1491 ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]); 1492 1493 status = ocfs2_journal_access(handle, inode, bhs[virtual], 1494 OCFS2_JOURNAL_ACCESS_CREATE); 1495 if (status < 0) { 1496 mlog_errno(status); 1497 goto bail; 1498 } 1499 1500 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1501 1502 memcpy(bhs[virtual]->b_data, c, 1503 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1504 bytes_left); 1505 1506 status = ocfs2_journal_dirty(handle, bhs[virtual]); 1507 if (status < 0) { 1508 mlog_errno(status); 1509 goto bail; 1510 } 1511 1512 virtual++; 1513 p_blkno++; 1514 bytes_left -= sb->s_blocksize; 1515 } 1516 1517 status = 0; 1518 bail: 1519 1520 if (bhs) { 1521 for(i = 0; i < blocks; i++) 1522 if (bhs[i]) 1523 brelse(bhs[i]); 1524 kfree(bhs); 1525 } 1526 1527 mlog_exit(status); 1528 return status; 1529 } 1530 1531 static int ocfs2_symlink(struct inode *dir, 1532 struct dentry *dentry, 1533 const char *symname) 1534 { 1535 int status, l, credits; 1536 u64 newsize; 1537 struct ocfs2_super *osb = NULL; 1538 struct inode *inode = NULL; 1539 struct super_block *sb; 1540 struct buffer_head *new_fe_bh = NULL; 1541 struct buffer_head *de_bh = NULL; 1542 struct buffer_head *parent_fe_bh = NULL; 1543 struct ocfs2_dinode *fe = NULL; 1544 struct ocfs2_dinode *dirfe; 1545 struct ocfs2_journal_handle *handle = NULL; 1546 struct ocfs2_alloc_context *inode_ac = NULL; 1547 struct ocfs2_alloc_context *data_ac = NULL; 1548 1549 mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir, 1550 dentry, symname, dentry->d_name.len, dentry->d_name.name); 1551 1552 sb = dir->i_sb; 1553 osb = OCFS2_SB(sb); 1554 1555 l = strlen(symname) + 1; 1556 1557 credits = ocfs2_calc_symlink_credits(sb); 1558 1559 handle = ocfs2_alloc_handle(osb); 1560 if (handle == NULL) { 1561 status = -ENOMEM; 1562 mlog_errno(status); 1563 goto bail; 1564 } 1565 1566 /* lock the parent directory */ 1567 status = ocfs2_meta_lock(dir, handle, &parent_fe_bh, 1); 1568 if (status < 0) { 1569 if (status != -ENOENT) 1570 mlog_errno(status); 1571 goto bail; 1572 } 1573 1574 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1575 if (!dirfe->i_links_count) { 1576 /* can't make a file in a deleted directory. */ 1577 status = -ENOENT; 1578 goto bail; 1579 } 1580 1581 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1582 dentry->d_name.len); 1583 if (status) 1584 goto bail; 1585 1586 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1587 dentry->d_name.name, 1588 dentry->d_name.len, &de_bh); 1589 if (status < 0) { 1590 mlog_errno(status); 1591 goto bail; 1592 } 1593 1594 status = ocfs2_reserve_new_inode(osb, handle, &inode_ac); 1595 if (status < 0) { 1596 if (status != -ENOSPC) 1597 mlog_errno(status); 1598 goto bail; 1599 } 1600 1601 /* don't reserve bitmap space for fast symlinks. */ 1602 if (l > ocfs2_fast_symlink_chars(sb)) { 1603 status = ocfs2_reserve_clusters(osb, handle, 1, &data_ac); 1604 if (status < 0) { 1605 if (status != -ENOSPC) 1606 mlog_errno(status); 1607 goto bail; 1608 } 1609 } 1610 1611 handle = ocfs2_start_trans(osb, handle, credits); 1612 if (IS_ERR(handle)) { 1613 status = PTR_ERR(handle); 1614 handle = NULL; 1615 mlog_errno(status); 1616 goto bail; 1617 } 1618 1619 status = ocfs2_mknod_locked(osb, dir, dentry, 1620 S_IFLNK | S_IRWXUGO, 0, 1621 &new_fe_bh, parent_fe_bh, handle, 1622 &inode, inode_ac); 1623 if (status < 0) { 1624 mlog_errno(status); 1625 goto bail; 1626 } 1627 1628 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1629 inode->i_rdev = 0; 1630 newsize = l - 1; 1631 if (l > ocfs2_fast_symlink_chars(sb)) { 1632 inode->i_op = &ocfs2_symlink_inode_operations; 1633 status = ocfs2_do_extend_allocation(osb, inode, 1, new_fe_bh, 1634 handle, data_ac, NULL, 1635 NULL); 1636 if (status < 0) { 1637 if (status != -ENOSPC && status != -EINTR) { 1638 mlog(ML_ERROR, 1639 "Failed to extend file to %llu\n", 1640 (unsigned long long)newsize); 1641 mlog_errno(status); 1642 status = -ENOSPC; 1643 } 1644 goto bail; 1645 } 1646 i_size_write(inode, newsize); 1647 inode->i_blocks = ocfs2_align_bytes_to_sectors(newsize); 1648 } else { 1649 inode->i_op = &ocfs2_fast_symlink_inode_operations; 1650 memcpy((char *) fe->id2.i_symlink, symname, l); 1651 i_size_write(inode, newsize); 1652 inode->i_blocks = 0; 1653 } 1654 1655 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1656 if (status < 0) { 1657 mlog_errno(status); 1658 goto bail; 1659 } 1660 1661 if (!ocfs2_inode_is_fast_symlink(inode)) { 1662 status = ocfs2_create_symlink_data(osb, handle, inode, 1663 symname); 1664 if (status < 0) { 1665 mlog_errno(status); 1666 goto bail; 1667 } 1668 } 1669 1670 status = ocfs2_add_entry(handle, dentry, inode, 1671 le64_to_cpu(fe->i_blkno), parent_fe_bh, 1672 de_bh); 1673 if (status < 0) { 1674 mlog_errno(status); 1675 goto bail; 1676 } 1677 1678 insert_inode_hash(inode); 1679 dentry->d_op = &ocfs2_dentry_ops; 1680 d_instantiate(dentry, inode); 1681 bail: 1682 if (handle) 1683 ocfs2_commit_trans(handle); 1684 if (new_fe_bh) 1685 brelse(new_fe_bh); 1686 if (parent_fe_bh) 1687 brelse(parent_fe_bh); 1688 if (de_bh) 1689 brelse(de_bh); 1690 if (inode_ac) 1691 ocfs2_free_alloc_context(inode_ac); 1692 if (data_ac) 1693 ocfs2_free_alloc_context(data_ac); 1694 if ((status < 0) && inode) 1695 iput(inode); 1696 1697 mlog_exit(status); 1698 1699 return status; 1700 } 1701 1702 int ocfs2_check_dir_entry(struct inode * dir, 1703 struct ocfs2_dir_entry * de, 1704 struct buffer_head * bh, 1705 unsigned long offset) 1706 { 1707 const char *error_msg = NULL; 1708 const int rlen = le16_to_cpu(de->rec_len); 1709 1710 if (rlen < OCFS2_DIR_REC_LEN(1)) 1711 error_msg = "rec_len is smaller than minimal"; 1712 else if (rlen % 4 != 0) 1713 error_msg = "rec_len % 4 != 0"; 1714 else if (rlen < OCFS2_DIR_REC_LEN(de->name_len)) 1715 error_msg = "rec_len is too small for name_len"; 1716 else if (((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize) 1717 error_msg = "directory entry across blocks"; 1718 1719 if (error_msg != NULL) 1720 mlog(ML_ERROR, "bad entry in directory #%llu: %s - " 1721 "offset=%lu, inode=%llu, rec_len=%d, name_len=%d\n", 1722 (unsigned long long)OCFS2_I(dir)->ip_blkno, error_msg, 1723 offset, (unsigned long long)le64_to_cpu(de->inode), rlen, 1724 de->name_len); 1725 return error_msg == NULL ? 1 : 0; 1726 } 1727 1728 /* we don't always have a dentry for what we want to add, so people 1729 * like orphan dir can call this instead. 1730 * 1731 * If you pass me insert_bh, I'll skip the search of the other dir 1732 * blocks and put the record in there. 1733 */ 1734 static int __ocfs2_add_entry(struct ocfs2_journal_handle *handle, 1735 struct inode *dir, 1736 const char *name, int namelen, 1737 struct inode *inode, u64 blkno, 1738 struct buffer_head *parent_fe_bh, 1739 struct buffer_head *insert_bh) 1740 { 1741 unsigned long offset; 1742 unsigned short rec_len; 1743 struct ocfs2_dir_entry *de, *de1; 1744 struct super_block *sb; 1745 int retval, status; 1746 1747 mlog_entry_void(); 1748 1749 sb = dir->i_sb; 1750 1751 if (!namelen) 1752 return -EINVAL; 1753 1754 rec_len = OCFS2_DIR_REC_LEN(namelen); 1755 offset = 0; 1756 de = (struct ocfs2_dir_entry *) insert_bh->b_data; 1757 while (1) { 1758 BUG_ON((char *)de >= sb->s_blocksize + insert_bh->b_data); 1759 /* These checks should've already been passed by the 1760 * prepare function, but I guess we can leave them 1761 * here anyway. */ 1762 if (!ocfs2_check_dir_entry(dir, de, insert_bh, offset)) { 1763 retval = -ENOENT; 1764 goto bail; 1765 } 1766 if (ocfs2_match(namelen, name, de)) { 1767 retval = -EEXIST; 1768 goto bail; 1769 } 1770 if (((le64_to_cpu(de->inode) == 0) && 1771 (le16_to_cpu(de->rec_len) >= rec_len)) || 1772 (le16_to_cpu(de->rec_len) >= 1773 (OCFS2_DIR_REC_LEN(de->name_len) + rec_len))) { 1774 status = ocfs2_journal_access(handle, dir, insert_bh, 1775 OCFS2_JOURNAL_ACCESS_WRITE); 1776 /* By now the buffer is marked for journaling */ 1777 offset += le16_to_cpu(de->rec_len); 1778 if (le64_to_cpu(de->inode)) { 1779 de1 = (struct ocfs2_dir_entry *)((char *) de + 1780 OCFS2_DIR_REC_LEN(de->name_len)); 1781 de1->rec_len = 1782 cpu_to_le16(le16_to_cpu(de->rec_len) - 1783 OCFS2_DIR_REC_LEN(de->name_len)); 1784 de->rec_len = cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len)); 1785 de = de1; 1786 } 1787 de->file_type = OCFS2_FT_UNKNOWN; 1788 if (blkno) { 1789 de->inode = cpu_to_le64(blkno); 1790 ocfs2_set_de_type(de, inode->i_mode); 1791 } else 1792 de->inode = 0; 1793 de->name_len = namelen; 1794 memcpy(de->name, name, namelen); 1795 1796 dir->i_mtime = dir->i_ctime = CURRENT_TIME; 1797 dir->i_version++; 1798 status = ocfs2_journal_dirty(handle, insert_bh); 1799 retval = 0; 1800 goto bail; 1801 } 1802 offset += le16_to_cpu(de->rec_len); 1803 de = (struct ocfs2_dir_entry *) ((char *) de + le16_to_cpu(de->rec_len)); 1804 } 1805 1806 /* when you think about it, the assert above should prevent us 1807 * from ever getting here. */ 1808 retval = -ENOSPC; 1809 bail: 1810 1811 mlog_exit(retval); 1812 return retval; 1813 } 1814 1815 1816 /* 1817 * ocfs2_delete_entry deletes a directory entry by merging it with the 1818 * previous entry 1819 */ 1820 static int ocfs2_delete_entry(struct ocfs2_journal_handle *handle, 1821 struct inode *dir, 1822 struct ocfs2_dir_entry *de_del, 1823 struct buffer_head *bh) 1824 { 1825 struct ocfs2_dir_entry *de, *pde; 1826 int i, status = -ENOENT; 1827 1828 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p)\n", handle, dir, de_del, bh); 1829 1830 i = 0; 1831 pde = NULL; 1832 de = (struct ocfs2_dir_entry *) bh->b_data; 1833 while (i < bh->b_size) { 1834 if (!ocfs2_check_dir_entry(dir, de, bh, i)) { 1835 status = -EIO; 1836 mlog_errno(status); 1837 goto bail; 1838 } 1839 if (de == de_del) { 1840 status = ocfs2_journal_access(handle, dir, bh, 1841 OCFS2_JOURNAL_ACCESS_WRITE); 1842 if (status < 0) { 1843 status = -EIO; 1844 mlog_errno(status); 1845 goto bail; 1846 } 1847 if (pde) 1848 pde->rec_len = 1849 cpu_to_le16(le16_to_cpu(pde->rec_len) + 1850 le16_to_cpu(de->rec_len)); 1851 else 1852 de->inode = 0; 1853 dir->i_version++; 1854 status = ocfs2_journal_dirty(handle, bh); 1855 goto bail; 1856 } 1857 i += le16_to_cpu(de->rec_len); 1858 pde = de; 1859 de = (struct ocfs2_dir_entry *)((char *)de + le16_to_cpu(de->rec_len)); 1860 } 1861 bail: 1862 mlog_exit(status); 1863 return status; 1864 } 1865 1866 /* 1867 * Returns 0 if not found, -1 on failure, and 1 on success 1868 */ 1869 static int inline ocfs2_search_dirblock(struct buffer_head *bh, 1870 struct inode *dir, 1871 const char *name, int namelen, 1872 unsigned long offset, 1873 struct ocfs2_dir_entry **res_dir) 1874 { 1875 struct ocfs2_dir_entry *de; 1876 char *dlimit, *de_buf; 1877 int de_len; 1878 int ret = 0; 1879 1880 mlog_entry_void(); 1881 1882 de_buf = bh->b_data; 1883 dlimit = de_buf + dir->i_sb->s_blocksize; 1884 1885 while (de_buf < dlimit) { 1886 /* this code is executed quadratically often */ 1887 /* do minimal checking `by hand' */ 1888 1889 de = (struct ocfs2_dir_entry *) de_buf; 1890 1891 if (de_buf + namelen <= dlimit && 1892 ocfs2_match(namelen, name, de)) { 1893 /* found a match - just to be sure, do a full check */ 1894 if (!ocfs2_check_dir_entry(dir, de, bh, offset)) { 1895 ret = -1; 1896 goto bail; 1897 } 1898 *res_dir = de; 1899 ret = 1; 1900 goto bail; 1901 } 1902 1903 /* prevent looping on a bad block */ 1904 de_len = le16_to_cpu(de->rec_len); 1905 if (de_len <= 0) { 1906 ret = -1; 1907 goto bail; 1908 } 1909 1910 de_buf += de_len; 1911 offset += de_len; 1912 } 1913 1914 bail: 1915 mlog_exit(ret); 1916 return ret; 1917 } 1918 1919 struct buffer_head *ocfs2_find_entry(const char *name, int namelen, 1920 struct inode *dir, 1921 struct ocfs2_dir_entry **res_dir) 1922 { 1923 struct super_block *sb; 1924 struct buffer_head *bh_use[NAMEI_RA_SIZE]; 1925 struct buffer_head *bh, *ret = NULL; 1926 unsigned long start, block, b; 1927 int ra_max = 0; /* Number of bh's in the readahead 1928 buffer, bh_use[] */ 1929 int ra_ptr = 0; /* Current index into readahead 1930 buffer */ 1931 int num = 0; 1932 int nblocks, i, err; 1933 1934 mlog_entry_void(); 1935 1936 *res_dir = NULL; 1937 sb = dir->i_sb; 1938 1939 nblocks = i_size_read(dir) >> sb->s_blocksize_bits; 1940 start = OCFS2_I(dir)->ip_dir_start_lookup; 1941 if (start >= nblocks) 1942 start = 0; 1943 block = start; 1944 1945 restart: 1946 do { 1947 /* 1948 * We deal with the read-ahead logic here. 1949 */ 1950 if (ra_ptr >= ra_max) { 1951 /* Refill the readahead buffer */ 1952 ra_ptr = 0; 1953 b = block; 1954 for (ra_max = 0; ra_max < NAMEI_RA_SIZE; ra_max++) { 1955 /* 1956 * Terminate if we reach the end of the 1957 * directory and must wrap, or if our 1958 * search has finished at this block. 1959 */ 1960 if (b >= nblocks || (num && block == start)) { 1961 bh_use[ra_max] = NULL; 1962 break; 1963 } 1964 num++; 1965 1966 bh = ocfs2_bread(dir, b++, &err, 1); 1967 bh_use[ra_max] = bh; 1968 } 1969 } 1970 if ((bh = bh_use[ra_ptr++]) == NULL) 1971 goto next; 1972 wait_on_buffer(bh); 1973 if (!buffer_uptodate(bh)) { 1974 /* read error, skip block & hope for the best */ 1975 ocfs2_error(dir->i_sb, "reading directory %llu, " 1976 "offset %lu\n", 1977 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1978 block); 1979 brelse(bh); 1980 goto next; 1981 } 1982 i = ocfs2_search_dirblock(bh, dir, name, namelen, 1983 block << sb->s_blocksize_bits, 1984 res_dir); 1985 if (i == 1) { 1986 OCFS2_I(dir)->ip_dir_start_lookup = block; 1987 ret = bh; 1988 goto cleanup_and_exit; 1989 } else { 1990 brelse(bh); 1991 if (i < 0) 1992 goto cleanup_and_exit; 1993 } 1994 next: 1995 if (++block >= nblocks) 1996 block = 0; 1997 } while (block != start); 1998 1999 /* 2000 * If the directory has grown while we were searching, then 2001 * search the last part of the directory before giving up. 2002 */ 2003 block = nblocks; 2004 nblocks = i_size_read(dir) >> sb->s_blocksize_bits; 2005 if (block < nblocks) { 2006 start = 0; 2007 goto restart; 2008 } 2009 2010 cleanup_and_exit: 2011 /* Clean up the read-ahead blocks */ 2012 for (; ra_ptr < ra_max; ra_ptr++) 2013 brelse(bh_use[ra_ptr]); 2014 2015 mlog_exit_ptr(ret); 2016 return ret; 2017 } 2018 2019 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2020 { 2021 int status, namelen; 2022 2023 mlog_entry_void(); 2024 2025 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2026 (long long)blkno); 2027 if (namelen <= 0) { 2028 if (namelen) 2029 status = namelen; 2030 else 2031 status = -EINVAL; 2032 mlog_errno(status); 2033 goto bail; 2034 } 2035 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2036 status = -EINVAL; 2037 mlog_errno(status); 2038 goto bail; 2039 } 2040 2041 mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name, 2042 namelen); 2043 2044 status = 0; 2045 bail: 2046 mlog_exit(status); 2047 return status; 2048 } 2049 2050 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2051 struct ocfs2_journal_handle *handle, 2052 struct inode *inode, 2053 char *name, 2054 struct buffer_head **de_bh) 2055 { 2056 struct inode *orphan_dir_inode = NULL; 2057 struct buffer_head *orphan_dir_bh = NULL; 2058 int status = 0; 2059 2060 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2061 if (status < 0) { 2062 mlog_errno(status); 2063 goto leave; 2064 } 2065 2066 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2067 ORPHAN_DIR_SYSTEM_INODE, 2068 osb->slot_num); 2069 if (!orphan_dir_inode) { 2070 status = -ENOENT; 2071 mlog_errno(status); 2072 goto leave; 2073 } 2074 2075 ocfs2_handle_add_inode(handle, orphan_dir_inode); 2076 status = ocfs2_meta_lock(orphan_dir_inode, handle, &orphan_dir_bh, 1); 2077 if (status < 0) { 2078 mlog_errno(status); 2079 goto leave; 2080 } 2081 2082 status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2083 orphan_dir_bh, name, 2084 OCFS2_ORPHAN_NAMELEN, de_bh); 2085 if (status < 0) { 2086 mlog_errno(status); 2087 goto leave; 2088 } 2089 2090 leave: 2091 if (orphan_dir_inode) 2092 iput(orphan_dir_inode); 2093 2094 if (orphan_dir_bh) 2095 brelse(orphan_dir_bh); 2096 2097 mlog_exit(status); 2098 return status; 2099 } 2100 2101 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2102 struct ocfs2_journal_handle *handle, 2103 struct inode *inode, 2104 struct ocfs2_dinode *fe, 2105 char *name, 2106 struct buffer_head *de_bh) 2107 { 2108 struct inode *orphan_dir_inode = NULL; 2109 struct buffer_head *orphan_dir_bh = NULL; 2110 int status = 0; 2111 struct ocfs2_dinode *orphan_fe; 2112 2113 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino); 2114 2115 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2116 ORPHAN_DIR_SYSTEM_INODE, 2117 osb->slot_num); 2118 if (!orphan_dir_inode) { 2119 status = -ENOENT; 2120 mlog_errno(status); 2121 goto leave; 2122 } 2123 2124 status = ocfs2_read_block(osb, 2125 OCFS2_I(orphan_dir_inode)->ip_blkno, 2126 &orphan_dir_bh, OCFS2_BH_CACHED, 2127 orphan_dir_inode); 2128 if (status < 0) { 2129 mlog_errno(status); 2130 goto leave; 2131 } 2132 2133 status = ocfs2_journal_access(handle, orphan_dir_inode, orphan_dir_bh, 2134 OCFS2_JOURNAL_ACCESS_WRITE); 2135 if (status < 0) { 2136 mlog_errno(status); 2137 goto leave; 2138 } 2139 2140 /* we're a cluster, and nlink can change on disk from 2141 * underneath us... */ 2142 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2143 if (S_ISDIR(inode->i_mode)) 2144 le16_add_cpu(&orphan_fe->i_links_count, 1); 2145 orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); 2146 2147 status = ocfs2_journal_dirty(handle, orphan_dir_bh); 2148 if (status < 0) { 2149 mlog_errno(status); 2150 goto leave; 2151 } 2152 2153 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2154 OCFS2_ORPHAN_NAMELEN, inode, 2155 OCFS2_I(inode)->ip_blkno, 2156 orphan_dir_bh, de_bh); 2157 if (status < 0) { 2158 mlog_errno(status); 2159 goto leave; 2160 } 2161 2162 le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL); 2163 2164 /* Record which orphan dir our inode now resides 2165 * in. delete_inode will use this to determine which orphan 2166 * dir to lock. */ 2167 spin_lock(&OCFS2_I(inode)->ip_lock); 2168 OCFS2_I(inode)->ip_orphaned_slot = osb->slot_num; 2169 spin_unlock(&OCFS2_I(inode)->ip_lock); 2170 2171 mlog(0, "Inode %llu orphaned in slot %d\n", 2172 (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num); 2173 2174 leave: 2175 if (orphan_dir_inode) 2176 iput(orphan_dir_inode); 2177 2178 if (orphan_dir_bh) 2179 brelse(orphan_dir_bh); 2180 2181 mlog_exit(status); 2182 return status; 2183 } 2184 2185 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2186 int ocfs2_orphan_del(struct ocfs2_super *osb, 2187 struct ocfs2_journal_handle *handle, 2188 struct inode *orphan_dir_inode, 2189 struct inode *inode, 2190 struct buffer_head *orphan_dir_bh) 2191 { 2192 char name[OCFS2_ORPHAN_NAMELEN + 1]; 2193 struct ocfs2_dinode *orphan_fe; 2194 int status = 0; 2195 struct buffer_head *target_de_bh = NULL; 2196 struct ocfs2_dir_entry *target_de = NULL; 2197 2198 mlog_entry_void(); 2199 2200 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2201 if (status < 0) { 2202 mlog_errno(status); 2203 goto leave; 2204 } 2205 2206 mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n", 2207 name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2208 OCFS2_ORPHAN_NAMELEN); 2209 2210 /* find it's spot in the orphan directory */ 2211 target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, 2212 orphan_dir_inode, &target_de); 2213 if (!target_de_bh) { 2214 status = -ENOENT; 2215 mlog_errno(status); 2216 goto leave; 2217 } 2218 2219 /* remove it from the orphan directory */ 2220 status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de, 2221 target_de_bh); 2222 if (status < 0) { 2223 mlog_errno(status); 2224 goto leave; 2225 } 2226 2227 status = ocfs2_journal_access(handle,orphan_dir_inode, orphan_dir_bh, 2228 OCFS2_JOURNAL_ACCESS_WRITE); 2229 if (status < 0) { 2230 mlog_errno(status); 2231 goto leave; 2232 } 2233 2234 /* do the i_nlink dance! :) */ 2235 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2236 if (S_ISDIR(inode->i_mode)) 2237 le16_add_cpu(&orphan_fe->i_links_count, -1); 2238 orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); 2239 2240 status = ocfs2_journal_dirty(handle, orphan_dir_bh); 2241 if (status < 0) { 2242 mlog_errno(status); 2243 goto leave; 2244 } 2245 2246 leave: 2247 if (target_de_bh) 2248 brelse(target_de_bh); 2249 2250 mlog_exit(status); 2251 return status; 2252 } 2253 2254 struct inode_operations ocfs2_dir_iops = { 2255 .create = ocfs2_create, 2256 .lookup = ocfs2_lookup, 2257 .link = ocfs2_link, 2258 .unlink = ocfs2_unlink, 2259 .rmdir = ocfs2_unlink, 2260 .symlink = ocfs2_symlink, 2261 .mkdir = ocfs2_mkdir, 2262 .mknod = ocfs2_mknod, 2263 .rename = ocfs2_rename, 2264 .setattr = ocfs2_setattr, 2265 .getattr = ocfs2_getattr, 2266 }; 2267