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 "symlink.h" 60 #include "sysfile.h" 61 #include "uptodate.h" 62 #include "vote.h" 63 64 #include "buffer_head_io.h" 65 66 #define NAMEI_RA_CHUNKS 2 67 #define NAMEI_RA_BLOCKS 4 68 #define NAMEI_RA_SIZE (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS) 69 #define NAMEI_RA_INDEX(c,b) (((c) * NAMEI_RA_BLOCKS) + (b)) 70 71 static int inline ocfs2_search_dirblock(struct buffer_head *bh, 72 struct inode *dir, 73 const char *name, int namelen, 74 unsigned long offset, 75 struct ocfs2_dir_entry **res_dir); 76 77 static int ocfs2_delete_entry(struct ocfs2_journal_handle *handle, 78 struct inode *dir, 79 struct ocfs2_dir_entry *de_del, 80 struct buffer_head *bh); 81 82 static int __ocfs2_add_entry(struct ocfs2_journal_handle *handle, 83 struct inode *dir, 84 const char *name, int namelen, 85 struct inode *inode, u64 blkno, 86 struct buffer_head *parent_fe_bh, 87 struct buffer_head *insert_bh); 88 89 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 90 struct inode *dir, 91 struct dentry *dentry, int mode, 92 dev_t dev, 93 struct buffer_head **new_fe_bh, 94 struct buffer_head *parent_fe_bh, 95 struct ocfs2_journal_handle *handle, 96 struct inode **ret_inode, 97 struct ocfs2_alloc_context *inode_ac); 98 99 static int ocfs2_fill_new_dir(struct ocfs2_super *osb, 100 struct ocfs2_journal_handle *handle, 101 struct inode *parent, 102 struct inode *inode, 103 struct buffer_head *fe_bh, 104 struct ocfs2_alloc_context *data_ac); 105 106 static int ocfs2_double_lock(struct ocfs2_super *osb, 107 struct ocfs2_journal_handle *handle, 108 struct buffer_head **bh1, 109 struct inode *inode1, 110 struct buffer_head **bh2, 111 struct inode *inode2); 112 113 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 114 struct ocfs2_journal_handle *handle, 115 struct inode *inode, 116 char *name, 117 struct buffer_head **de_bh); 118 119 static int ocfs2_orphan_add(struct ocfs2_super *osb, 120 struct ocfs2_journal_handle *handle, 121 struct inode *inode, 122 struct ocfs2_dinode *fe, 123 char *name, 124 struct buffer_head *de_bh); 125 126 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 127 struct ocfs2_journal_handle *handle, 128 struct inode *inode, 129 const char *symname); 130 131 static inline int ocfs2_add_entry(struct ocfs2_journal_handle *handle, 132 struct dentry *dentry, 133 struct inode *inode, u64 blkno, 134 struct buffer_head *parent_fe_bh, 135 struct buffer_head *insert_bh) 136 { 137 return __ocfs2_add_entry(handle, dentry->d_parent->d_inode, 138 dentry->d_name.name, dentry->d_name.len, 139 inode, blkno, parent_fe_bh, insert_bh); 140 } 141 142 /* An orphan dir name is an 8 byte value, printed as a hex string */ 143 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64))) 144 145 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, 146 struct nameidata *nd) 147 { 148 int status; 149 u64 blkno; 150 struct buffer_head *dirent_bh = NULL; 151 struct inode *inode = NULL; 152 struct dentry *ret; 153 struct ocfs2_dir_entry *dirent; 154 struct ocfs2_inode_info *oi; 155 156 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, 157 dentry->d_name.len, dentry->d_name.name); 158 159 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { 160 ret = ERR_PTR(-ENAMETOOLONG); 161 goto bail; 162 } 163 164 mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len, 165 dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno); 166 167 status = ocfs2_meta_lock(dir, NULL, NULL, 0); 168 if (status < 0) { 169 if (status != -ENOENT) 170 mlog_errno(status); 171 ret = ERR_PTR(status); 172 goto bail; 173 } 174 175 status = ocfs2_find_files_on_disk(dentry->d_name.name, 176 dentry->d_name.len, &blkno, 177 dir, &dirent_bh, &dirent); 178 if (status < 0) 179 goto bail_add; 180 181 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno); 182 if (IS_ERR(inode)) { 183 mlog(ML_ERROR, "Unable to create inode %llu\n", 184 (unsigned long long)blkno); 185 ret = ERR_PTR(-EACCES); 186 goto bail_unlock; 187 } 188 189 oi = OCFS2_I(inode); 190 /* Clear any orphaned state... If we were able to look up the 191 * inode from a directory, it certainly can't be orphaned. We 192 * might have the bad state from a node which intended to 193 * orphan this inode but crashed before it could commit the 194 * unlink. */ 195 spin_lock(&oi->ip_lock); 196 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; 197 oi->ip_orphaned_slot = OCFS2_INVALID_SLOT; 198 spin_unlock(&oi->ip_lock); 199 200 bail_add: 201 202 dentry->d_op = &ocfs2_dentry_ops; 203 ret = d_splice_alias(inode, dentry); 204 205 bail_unlock: 206 /* Don't drop the cluster lock until *after* the d_add -- 207 * unlink on another node will message us to remove that 208 * dentry under this lock so otherwise we can race this with 209 * the vote thread and have a stale dentry. */ 210 ocfs2_meta_unlock(dir, 0); 211 212 bail: 213 if (dirent_bh) 214 brelse(dirent_bh); 215 216 mlog_exit_ptr(ret); 217 218 return ret; 219 } 220 221 static int ocfs2_fill_new_dir(struct ocfs2_super *osb, 222 struct ocfs2_journal_handle *handle, 223 struct inode *parent, 224 struct inode *inode, 225 struct buffer_head *fe_bh, 226 struct ocfs2_alloc_context *data_ac) 227 { 228 int status; 229 struct buffer_head *new_bh = NULL; 230 struct ocfs2_dir_entry *de = NULL; 231 232 mlog_entry_void(); 233 234 status = ocfs2_do_extend_dir(osb->sb, handle, inode, fe_bh, 235 data_ac, NULL, &new_bh); 236 if (status < 0) { 237 mlog_errno(status); 238 goto bail; 239 } 240 241 ocfs2_set_new_buffer_uptodate(inode, new_bh); 242 243 status = ocfs2_journal_access(handle, inode, new_bh, 244 OCFS2_JOURNAL_ACCESS_CREATE); 245 if (status < 0) { 246 mlog_errno(status); 247 goto bail; 248 } 249 memset(new_bh->b_data, 0, osb->sb->s_blocksize); 250 251 de = (struct ocfs2_dir_entry *) new_bh->b_data; 252 de->inode = cpu_to_le64(OCFS2_I(inode)->ip_blkno); 253 de->name_len = 1; 254 de->rec_len = 255 cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len)); 256 strcpy(de->name, "."); 257 ocfs2_set_de_type(de, S_IFDIR); 258 de = (struct ocfs2_dir_entry *) ((char *)de + le16_to_cpu(de->rec_len)); 259 de->inode = cpu_to_le64(OCFS2_I(parent)->ip_blkno); 260 de->rec_len = cpu_to_le16(inode->i_sb->s_blocksize - 261 OCFS2_DIR_REC_LEN(1)); 262 de->name_len = 2; 263 strcpy(de->name, ".."); 264 ocfs2_set_de_type(de, S_IFDIR); 265 266 status = ocfs2_journal_dirty(handle, new_bh); 267 if (status < 0) { 268 mlog_errno(status); 269 goto bail; 270 } 271 272 i_size_write(inode, inode->i_sb->s_blocksize); 273 inode->i_nlink = 2; 274 inode->i_blocks = ocfs2_align_bytes_to_sectors(inode->i_sb->s_blocksize); 275 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); 276 if (status < 0) { 277 mlog_errno(status); 278 goto bail; 279 } 280 281 status = 0; 282 bail: 283 if (new_bh) 284 brelse(new_bh); 285 286 mlog_exit(status); 287 return status; 288 } 289 290 static int ocfs2_mknod(struct inode *dir, 291 struct dentry *dentry, 292 int mode, 293 dev_t dev) 294 { 295 int status = 0; 296 struct buffer_head *parent_fe_bh = NULL; 297 struct ocfs2_journal_handle *handle = NULL; 298 struct ocfs2_super *osb; 299 struct ocfs2_dinode *dirfe; 300 struct buffer_head *new_fe_bh = NULL; 301 struct buffer_head *de_bh = NULL; 302 struct inode *inode = NULL; 303 struct ocfs2_alloc_context *inode_ac = NULL; 304 struct ocfs2_alloc_context *data_ac = NULL; 305 306 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, 307 (unsigned long)dev, dentry->d_name.len, 308 dentry->d_name.name); 309 310 /* get our super block */ 311 osb = OCFS2_SB(dir->i_sb); 312 313 if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) { 314 mlog(ML_ERROR, "inode %llu has i_nlink of %u\n", 315 (unsigned long long)OCFS2_I(dir)->ip_blkno, dir->i_nlink); 316 status = -EMLINK; 317 goto leave; 318 } 319 320 handle = ocfs2_alloc_handle(osb); 321 if (handle == NULL) { 322 status = -ENOMEM; 323 mlog_errno(status); 324 goto leave; 325 } 326 327 status = ocfs2_meta_lock(dir, handle, &parent_fe_bh, 1); 328 if (status < 0) { 329 if (status != -ENOENT) 330 mlog_errno(status); 331 goto leave; 332 } 333 334 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 335 if (!dirfe->i_links_count) { 336 /* can't make a file in a deleted directory. */ 337 status = -ENOENT; 338 goto leave; 339 } 340 341 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 342 dentry->d_name.len); 343 if (status) 344 goto leave; 345 346 /* get a spot inside the dir. */ 347 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 348 dentry->d_name.name, 349 dentry->d_name.len, &de_bh); 350 if (status < 0) { 351 mlog_errno(status); 352 goto leave; 353 } 354 355 /* reserve an inode spot */ 356 status = ocfs2_reserve_new_inode(osb, handle, &inode_ac); 357 if (status < 0) { 358 if (status != -ENOSPC) 359 mlog_errno(status); 360 goto leave; 361 } 362 363 /* are we making a directory? If so, reserve a cluster for his 364 * 1st extent. */ 365 if (S_ISDIR(mode)) { 366 status = ocfs2_reserve_clusters(osb, handle, 1, &data_ac); 367 if (status < 0) { 368 if (status != -ENOSPC) 369 mlog_errno(status); 370 goto leave; 371 } 372 } 373 374 handle = ocfs2_start_trans(osb, handle, OCFS2_MKNOD_CREDITS); 375 if (IS_ERR(handle)) { 376 status = PTR_ERR(handle); 377 handle = NULL; 378 mlog_errno(status); 379 goto leave; 380 } 381 382 /* do the real work now. */ 383 status = ocfs2_mknod_locked(osb, dir, dentry, mode, dev, 384 &new_fe_bh, parent_fe_bh, handle, 385 &inode, inode_ac); 386 if (status < 0) { 387 mlog_errno(status); 388 goto leave; 389 } 390 391 if (S_ISDIR(mode)) { 392 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 393 new_fe_bh, data_ac); 394 if (status < 0) { 395 mlog_errno(status); 396 goto leave; 397 } 398 399 status = ocfs2_journal_access(handle, dir, parent_fe_bh, 400 OCFS2_JOURNAL_ACCESS_WRITE); 401 if (status < 0) { 402 mlog_errno(status); 403 goto leave; 404 } 405 le16_add_cpu(&dirfe->i_links_count, 1); 406 status = ocfs2_journal_dirty(handle, parent_fe_bh); 407 if (status < 0) { 408 mlog_errno(status); 409 goto leave; 410 } 411 dir->i_nlink++; 412 } 413 414 status = ocfs2_add_entry(handle, dentry, inode, 415 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 416 de_bh); 417 if (status < 0) { 418 mlog_errno(status); 419 goto leave; 420 } 421 422 insert_inode_hash(inode); 423 dentry->d_op = &ocfs2_dentry_ops; 424 d_instantiate(dentry, inode); 425 status = 0; 426 leave: 427 if (handle) 428 ocfs2_commit_trans(handle); 429 430 if (status == -ENOSPC) 431 mlog(0, "Disk is full\n"); 432 433 if (new_fe_bh) 434 brelse(new_fe_bh); 435 436 if (de_bh) 437 brelse(de_bh); 438 439 if (parent_fe_bh) 440 brelse(parent_fe_bh); 441 442 if ((status < 0) && inode) 443 iput(inode); 444 445 if (inode_ac) 446 ocfs2_free_alloc_context(inode_ac); 447 448 if (data_ac) 449 ocfs2_free_alloc_context(data_ac); 450 451 mlog_exit(status); 452 453 return status; 454 } 455 456 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 457 struct inode *dir, 458 struct dentry *dentry, int mode, 459 dev_t dev, 460 struct buffer_head **new_fe_bh, 461 struct buffer_head *parent_fe_bh, 462 struct ocfs2_journal_handle *handle, 463 struct inode **ret_inode, 464 struct ocfs2_alloc_context *inode_ac) 465 { 466 int status = 0; 467 struct ocfs2_dinode *fe = NULL; 468 struct ocfs2_extent_list *fel; 469 u64 fe_blkno = 0; 470 u16 suballoc_bit; 471 struct inode *inode = NULL; 472 473 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, 474 (unsigned long)dev, dentry->d_name.len, 475 dentry->d_name.name); 476 477 *new_fe_bh = NULL; 478 *ret_inode = NULL; 479 480 status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit, 481 &fe_blkno); 482 if (status < 0) { 483 mlog_errno(status); 484 goto leave; 485 } 486 487 inode = new_inode(dir->i_sb); 488 if (IS_ERR(inode)) { 489 status = PTR_ERR(inode); 490 mlog(ML_ERROR, "new_inode failed!\n"); 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 if (S_ISDIR(mode)) 500 inode->i_nlink = 2; 501 else 502 inode->i_nlink = 1; 503 inode->i_mode = mode; 504 spin_lock(&osb->osb_lock); 505 inode->i_generation = osb->s_next_generation++; 506 spin_unlock(&osb->osb_lock); 507 508 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 509 if (!*new_fe_bh) { 510 status = -EIO; 511 mlog_errno(status); 512 goto leave; 513 } 514 ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh); 515 516 status = ocfs2_journal_access(handle, inode, *new_fe_bh, 517 OCFS2_JOURNAL_ACCESS_CREATE); 518 if (status < 0) { 519 mlog_errno(status); 520 goto leave; 521 } 522 523 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 524 memset(fe, 0, osb->sb->s_blocksize); 525 526 fe->i_generation = cpu_to_le32(inode->i_generation); 527 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 528 fe->i_blkno = cpu_to_le64(fe_blkno); 529 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 530 fe->i_suballoc_slot = cpu_to_le16(osb->slot_num); 531 fe->i_uid = cpu_to_le32(current->fsuid); 532 if (dir->i_mode & S_ISGID) { 533 fe->i_gid = cpu_to_le32(dir->i_gid); 534 if (S_ISDIR(mode)) 535 mode |= S_ISGID; 536 } else 537 fe->i_gid = cpu_to_le32(current->fsgid); 538 fe->i_mode = cpu_to_le16(mode); 539 if (S_ISCHR(mode) || S_ISBLK(mode)) 540 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 541 542 fe->i_links_count = cpu_to_le16(inode->i_nlink); 543 544 fe->i_last_eb_blk = 0; 545 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 546 le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL); 547 fe->i_atime = fe->i_ctime = fe->i_mtime = 548 cpu_to_le64(CURRENT_TIME.tv_sec); 549 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 550 cpu_to_le32(CURRENT_TIME.tv_nsec); 551 fe->i_dtime = 0; 552 553 fel = &fe->id2.i_list; 554 fel->l_tree_depth = 0; 555 fel->l_next_free_rec = 0; 556 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 557 558 status = ocfs2_journal_dirty(handle, *new_fe_bh); 559 if (status < 0) { 560 mlog_errno(status); 561 goto leave; 562 } 563 564 if (ocfs2_populate_inode(inode, fe, 1) < 0) { 565 mlog(ML_ERROR, "populate inode failed! bh->b_blocknr=%llu, " 566 "i_blkno=%llu, i_ino=%lu\n", 567 (unsigned long long) (*new_fe_bh)->b_blocknr, 568 (unsigned long long)fe->i_blkno, inode->i_ino); 569 BUG(); 570 } 571 572 ocfs2_inode_set_new(osb, inode); 573 status = ocfs2_create_new_inode_locks(inode); 574 if (status < 0) 575 mlog_errno(status); 576 577 status = 0; /* error in ocfs2_create_new_inode_locks is not 578 * critical */ 579 580 *ret_inode = inode; 581 leave: 582 if (status < 0) { 583 if (*new_fe_bh) { 584 brelse(*new_fe_bh); 585 *new_fe_bh = NULL; 586 } 587 if (inode) 588 iput(inode); 589 } 590 591 mlog_exit(status); 592 return status; 593 } 594 595 static int ocfs2_mkdir(struct inode *dir, 596 struct dentry *dentry, 597 int mode) 598 { 599 int ret; 600 601 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, 602 dentry->d_name.len, dentry->d_name.name); 603 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); 604 mlog_exit(ret); 605 606 return ret; 607 } 608 609 static int ocfs2_create(struct inode *dir, 610 struct dentry *dentry, 611 int mode, 612 struct nameidata *nd) 613 { 614 int ret; 615 616 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, 617 dentry->d_name.len, dentry->d_name.name); 618 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); 619 mlog_exit(ret); 620 621 return ret; 622 } 623 624 static int ocfs2_link(struct dentry *old_dentry, 625 struct inode *dir, 626 struct dentry *dentry) 627 { 628 struct ocfs2_journal_handle *handle = NULL; 629 struct inode *inode = old_dentry->d_inode; 630 int err; 631 struct buffer_head *fe_bh = NULL; 632 struct buffer_head *parent_fe_bh = NULL; 633 struct buffer_head *de_bh = NULL; 634 struct ocfs2_dinode *fe = NULL; 635 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 636 637 mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino, 638 old_dentry->d_name.len, old_dentry->d_name.name, 639 dentry->d_name.len, dentry->d_name.name); 640 641 if (S_ISDIR(inode->i_mode)) { 642 err = -EPERM; 643 goto bail; 644 } 645 646 if (inode->i_nlink >= OCFS2_LINK_MAX) { 647 err = -EMLINK; 648 goto bail; 649 } 650 651 handle = ocfs2_alloc_handle(osb); 652 if (handle == NULL) { 653 err = -ENOMEM; 654 goto bail; 655 } 656 657 err = ocfs2_meta_lock(dir, handle, &parent_fe_bh, 1); 658 if (err < 0) { 659 if (err != -ENOENT) 660 mlog_errno(err); 661 goto bail; 662 } 663 664 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 665 dentry->d_name.len); 666 if (err) 667 goto bail; 668 669 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 670 dentry->d_name.name, 671 dentry->d_name.len, &de_bh); 672 if (err < 0) { 673 mlog_errno(err); 674 goto bail; 675 } 676 677 err = ocfs2_meta_lock(inode, handle, &fe_bh, 1); 678 if (err < 0) { 679 if (err != -ENOENT) 680 mlog_errno(err); 681 goto bail; 682 } 683 684 fe = (struct ocfs2_dinode *) fe_bh->b_data; 685 if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) { 686 err = -EMLINK; 687 goto bail; 688 } 689 690 handle = ocfs2_start_trans(osb, handle, OCFS2_LINK_CREDITS); 691 if (IS_ERR(handle)) { 692 err = PTR_ERR(handle); 693 handle = NULL; 694 mlog_errno(err); 695 goto bail; 696 } 697 698 err = ocfs2_journal_access(handle, inode, fe_bh, 699 OCFS2_JOURNAL_ACCESS_WRITE); 700 if (err < 0) { 701 mlog_errno(err); 702 goto bail; 703 } 704 705 inode->i_nlink++; 706 inode->i_ctime = CURRENT_TIME; 707 fe->i_links_count = cpu_to_le16(inode->i_nlink); 708 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 709 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 710 711 err = ocfs2_journal_dirty(handle, fe_bh); 712 if (err < 0) { 713 le16_add_cpu(&fe->i_links_count, -1); 714 inode->i_nlink--; 715 mlog_errno(err); 716 goto bail; 717 } 718 719 err = ocfs2_add_entry(handle, dentry, inode, 720 OCFS2_I(inode)->ip_blkno, 721 parent_fe_bh, de_bh); 722 if (err) { 723 le16_add_cpu(&fe->i_links_count, -1); 724 inode->i_nlink--; 725 mlog_errno(err); 726 goto bail; 727 } 728 729 atomic_inc(&inode->i_count); 730 dentry->d_op = &ocfs2_dentry_ops; 731 d_instantiate(dentry, inode); 732 bail: 733 if (handle) 734 ocfs2_commit_trans(handle); 735 if (de_bh) 736 brelse(de_bh); 737 if (fe_bh) 738 brelse(fe_bh); 739 if (parent_fe_bh) 740 brelse(parent_fe_bh); 741 742 mlog_exit(err); 743 744 return err; 745 } 746 747 static int ocfs2_unlink(struct inode *dir, 748 struct dentry *dentry) 749 { 750 int status; 751 unsigned int saved_nlink = 0; 752 struct inode *inode = dentry->d_inode; 753 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 754 u64 blkno; 755 struct ocfs2_dinode *fe = NULL; 756 struct buffer_head *fe_bh = NULL; 757 struct buffer_head *parent_node_bh = NULL; 758 struct ocfs2_journal_handle *handle = NULL; 759 struct ocfs2_dir_entry *dirent = NULL; 760 struct buffer_head *dirent_bh = NULL; 761 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 762 struct buffer_head *orphan_entry_bh = NULL; 763 764 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, 765 dentry->d_name.len, dentry->d_name.name); 766 767 BUG_ON(dentry->d_parent->d_inode != dir); 768 769 mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno); 770 771 if (inode == osb->root_inode) { 772 mlog(0, "Cannot delete the root directory\n"); 773 status = -EPERM; 774 goto leave; 775 } 776 777 handle = ocfs2_alloc_handle(osb); 778 if (handle == NULL) { 779 status = -ENOMEM; 780 mlog_errno(status); 781 goto leave; 782 } 783 784 status = ocfs2_meta_lock(dir, handle, &parent_node_bh, 1); 785 if (status < 0) { 786 if (status != -ENOENT) 787 mlog_errno(status); 788 goto leave; 789 } 790 791 status = ocfs2_find_files_on_disk(dentry->d_name.name, 792 dentry->d_name.len, &blkno, 793 dir, &dirent_bh, &dirent); 794 if (status < 0) { 795 if (status != -ENOENT) 796 mlog_errno(status); 797 goto leave; 798 } 799 800 if (OCFS2_I(inode)->ip_blkno != blkno) { 801 status = -ENOENT; 802 803 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n", 804 (unsigned long long)OCFS2_I(inode)->ip_blkno, 805 (unsigned long long)blkno, OCFS2_I(inode)->ip_flags); 806 goto leave; 807 } 808 809 status = ocfs2_meta_lock(inode, handle, &fe_bh, 1); 810 if (status < 0) { 811 if (status != -ENOENT) 812 mlog_errno(status); 813 goto leave; 814 } 815 816 if (S_ISDIR(inode->i_mode)) { 817 if (!ocfs2_empty_dir(inode)) { 818 status = -ENOTEMPTY; 819 goto leave; 820 } else if (inode->i_nlink != 2) { 821 status = -ENOTEMPTY; 822 goto leave; 823 } 824 } 825 826 /* There are still a few steps left until we can consider the 827 * unlink to have succeeded. Save off nlink here before 828 * modification so we can set it back in case we hit an issue 829 * before commit. */ 830 saved_nlink = inode->i_nlink; 831 if (S_ISDIR(inode->i_mode)) 832 inode->i_nlink = 0; 833 else 834 inode->i_nlink--; 835 836 status = ocfs2_request_unlink_vote(inode, dentry, 837 (unsigned int) inode->i_nlink); 838 if (status < 0) { 839 /* This vote should succeed under all normal 840 * circumstances. */ 841 mlog_errno(status); 842 goto leave; 843 } 844 845 if (!inode->i_nlink) { 846 status = ocfs2_prepare_orphan_dir(osb, handle, inode, 847 orphan_name, 848 &orphan_entry_bh); 849 if (status < 0) { 850 mlog_errno(status); 851 goto leave; 852 } 853 } 854 855 handle = ocfs2_start_trans(osb, handle, OCFS2_UNLINK_CREDITS); 856 if (IS_ERR(handle)) { 857 status = PTR_ERR(handle); 858 handle = NULL; 859 mlog_errno(status); 860 goto leave; 861 } 862 863 status = ocfs2_journal_access(handle, inode, fe_bh, 864 OCFS2_JOURNAL_ACCESS_WRITE); 865 if (status < 0) { 866 mlog_errno(status); 867 goto leave; 868 } 869 870 fe = (struct ocfs2_dinode *) fe_bh->b_data; 871 872 if (!inode->i_nlink) { 873 status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name, 874 orphan_entry_bh); 875 if (status < 0) { 876 mlog_errno(status); 877 goto leave; 878 } 879 } 880 881 /* delete the name from the parent dir */ 882 status = ocfs2_delete_entry(handle, dir, dirent, dirent_bh); 883 if (status < 0) { 884 mlog_errno(status); 885 goto leave; 886 } 887 888 /* We can set nlink on the dinode now. clear the saved version 889 * so that it doesn't get set later. */ 890 fe->i_links_count = cpu_to_le16(inode->i_nlink); 891 saved_nlink = 0; 892 893 status = ocfs2_journal_dirty(handle, fe_bh); 894 if (status < 0) { 895 mlog_errno(status); 896 goto leave; 897 } 898 899 if (S_ISDIR(inode->i_mode)) { 900 dir->i_nlink--; 901 status = ocfs2_mark_inode_dirty(handle, dir, 902 parent_node_bh); 903 if (status < 0) { 904 mlog_errno(status); 905 dir->i_nlink++; 906 } 907 } 908 909 leave: 910 if (status < 0 && saved_nlink) 911 inode->i_nlink = saved_nlink; 912 913 if (handle) 914 ocfs2_commit_trans(handle); 915 916 if (fe_bh) 917 brelse(fe_bh); 918 919 if (dirent_bh) 920 brelse(dirent_bh); 921 922 if (parent_node_bh) 923 brelse(parent_node_bh); 924 925 if (orphan_entry_bh) 926 brelse(orphan_entry_bh); 927 928 mlog_exit(status); 929 930 return status; 931 } 932 933 /* 934 * The only place this should be used is rename! 935 * if they have the same id, then the 1st one is the only one locked. 936 */ 937 static int ocfs2_double_lock(struct ocfs2_super *osb, 938 struct ocfs2_journal_handle *handle, 939 struct buffer_head **bh1, 940 struct inode *inode1, 941 struct buffer_head **bh2, 942 struct inode *inode2) 943 { 944 int status; 945 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 946 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 947 struct buffer_head **tmpbh; 948 struct inode *tmpinode; 949 950 mlog_entry("(inode1 = %llu, inode2 = %llu)\n", 951 (unsigned long long)oi1->ip_blkno, 952 (unsigned long long)oi2->ip_blkno); 953 954 BUG_ON(!handle); 955 956 if (*bh1) 957 *bh1 = NULL; 958 if (*bh2) 959 *bh2 = NULL; 960 961 /* we always want to lock the one with the lower lockid first. */ 962 if (oi1->ip_blkno != oi2->ip_blkno) { 963 if (oi1->ip_blkno < oi2->ip_blkno) { 964 /* switch id1 and id2 around */ 965 mlog(0, "switching them around...\n"); 966 tmpbh = bh2; 967 bh2 = bh1; 968 bh1 = tmpbh; 969 970 tmpinode = inode2; 971 inode2 = inode1; 972 inode1 = tmpinode; 973 } 974 /* lock id2 */ 975 status = ocfs2_meta_lock(inode2, handle, bh2, 1); 976 if (status < 0) { 977 if (status != -ENOENT) 978 mlog_errno(status); 979 goto bail; 980 } 981 } 982 /* lock id1 */ 983 status = ocfs2_meta_lock(inode1, handle, bh1, 1); 984 if (status < 0) { 985 if (status != -ENOENT) 986 mlog_errno(status); 987 goto bail; 988 } 989 bail: 990 mlog_exit(status); 991 return status; 992 } 993 994 #define PARENT_INO(buffer) \ 995 ((struct ocfs2_dir_entry *) \ 996 ((char *)buffer + \ 997 le16_to_cpu(((struct ocfs2_dir_entry *)buffer)->rec_len)))->inode 998 999 static int ocfs2_rename(struct inode *old_dir, 1000 struct dentry *old_dentry, 1001 struct inode *new_dir, 1002 struct dentry *new_dentry) 1003 { 1004 int status = 0, rename_lock = 0; 1005 struct inode *old_inode = old_dentry->d_inode; 1006 struct inode *new_inode = new_dentry->d_inode; 1007 struct ocfs2_dinode *newfe = NULL; 1008 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1009 struct buffer_head *orphan_entry_bh = NULL; 1010 struct buffer_head *newfe_bh = NULL; 1011 struct buffer_head *insert_entry_bh = NULL; 1012 struct ocfs2_super *osb = NULL; 1013 u64 newfe_blkno; 1014 struct ocfs2_journal_handle *handle = NULL; 1015 struct buffer_head *old_dir_bh = NULL; 1016 struct buffer_head *new_dir_bh = NULL; 1017 struct ocfs2_dir_entry *old_de = NULL, *new_de = NULL; // dirent for old_dentry 1018 // and new_dentry 1019 struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above 1020 struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir, 1021 // this is the 1st dirent bh 1022 nlink_t old_dir_nlink = old_dir->i_nlink, new_dir_nlink = new_dir->i_nlink; 1023 unsigned int links_count; 1024 1025 /* At some point it might be nice to break this function up a 1026 * bit. */ 1027 1028 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n", 1029 old_dir, old_dentry, new_dir, new_dentry, 1030 old_dentry->d_name.len, old_dentry->d_name.name, 1031 new_dentry->d_name.len, new_dentry->d_name.name); 1032 1033 osb = OCFS2_SB(old_dir->i_sb); 1034 1035 if (new_inode) { 1036 if (!igrab(new_inode)) 1037 BUG(); 1038 } 1039 1040 if (atomic_read(&old_dentry->d_count) > 2) { 1041 shrink_dcache_parent(old_dentry); 1042 if (atomic_read(&old_dentry->d_count) > 2) { 1043 status = -EBUSY; 1044 goto bail; 1045 } 1046 } 1047 1048 /* Assume a directory heirarchy thusly: 1049 * a/b/c 1050 * a/d 1051 * a,b,c, and d are all directories. 1052 * 1053 * from cwd of 'a' on both nodes: 1054 * node1: mv b/c d 1055 * node2: mv d b/c 1056 * 1057 * And that's why, just like the VFS, we need a file system 1058 * rename lock. */ 1059 if (old_dentry != new_dentry) { 1060 status = ocfs2_rename_lock(osb); 1061 if (status < 0) { 1062 mlog_errno(status); 1063 goto bail; 1064 } 1065 rename_lock = 1; 1066 } 1067 1068 handle = ocfs2_alloc_handle(osb); 1069 if (handle == NULL) { 1070 status = -ENOMEM; 1071 mlog_errno(status); 1072 goto bail; 1073 } 1074 1075 /* if old and new are the same, this'll just do one lock. */ 1076 status = ocfs2_double_lock(osb, handle, 1077 &old_dir_bh, old_dir, 1078 &new_dir_bh, new_dir); 1079 if (status < 0) { 1080 mlog_errno(status); 1081 goto bail; 1082 } 1083 1084 /* make sure both dirs have bhs 1085 * get an extra ref on old_dir_bh if old==new */ 1086 if (!new_dir_bh) { 1087 if (old_dir_bh) { 1088 new_dir_bh = old_dir_bh; 1089 get_bh(new_dir_bh); 1090 } else { 1091 mlog(ML_ERROR, "no old_dir_bh!\n"); 1092 status = -EIO; 1093 goto bail; 1094 } 1095 } 1096 1097 if (S_ISDIR(old_inode->i_mode)) { 1098 /* Directories actually require metadata updates to 1099 * the directory info so we can't get away with not 1100 * doing node locking on it. */ 1101 status = ocfs2_meta_lock(old_inode, handle, NULL, 1); 1102 if (status < 0) { 1103 if (status != -ENOENT) 1104 mlog_errno(status); 1105 goto bail; 1106 } 1107 1108 status = ocfs2_request_rename_vote(old_inode, old_dentry); 1109 if (status < 0) { 1110 mlog_errno(status); 1111 goto bail; 1112 } 1113 1114 status = -EIO; 1115 old_inode_de_bh = ocfs2_bread(old_inode, 0, &status, 0); 1116 if (!old_inode_de_bh) 1117 goto bail; 1118 1119 status = -EIO; 1120 if (le64_to_cpu(PARENT_INO(old_inode_de_bh->b_data)) != 1121 OCFS2_I(old_dir)->ip_blkno) 1122 goto bail; 1123 status = -EMLINK; 1124 if (!new_inode && new_dir!=old_dir && 1125 new_dir->i_nlink >= OCFS2_LINK_MAX) 1126 goto bail; 1127 } else { 1128 /* Ah, the simple case - we're a file so just send a 1129 * message. */ 1130 status = ocfs2_request_rename_vote(old_inode, old_dentry); 1131 if (status < 0) { 1132 mlog_errno(status); 1133 goto bail; 1134 } 1135 } 1136 1137 status = -ENOENT; 1138 old_de_bh = ocfs2_find_entry(old_dentry->d_name.name, 1139 old_dentry->d_name.len, 1140 old_dir, &old_de); 1141 if (!old_de_bh) 1142 goto bail; 1143 1144 /* 1145 * Check for inode number is _not_ due to possible IO errors. 1146 * We might rmdir the source, keep it as pwd of some process 1147 * and merrily kill the link to whatever was created under the 1148 * same name. Goodbye sticky bit ;-< 1149 */ 1150 if (le64_to_cpu(old_de->inode) != OCFS2_I(old_inode)->ip_blkno) 1151 goto bail; 1152 1153 /* check if the target already exists (in which case we need 1154 * to delete it */ 1155 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1156 new_dentry->d_name.len, 1157 &newfe_blkno, new_dir, &new_de_bh, 1158 &new_de); 1159 /* The only error we allow here is -ENOENT because the new 1160 * file not existing is perfectly valid. */ 1161 if ((status < 0) && (status != -ENOENT)) { 1162 /* If we cannot find the file specified we should just */ 1163 /* return the error... */ 1164 mlog_errno(status); 1165 goto bail; 1166 } 1167 1168 if (!new_de && new_inode) 1169 mlog(ML_ERROR, "inode %lu does not exist in it's parent " 1170 "directory!", new_inode->i_ino); 1171 1172 /* In case we need to overwrite an existing file, we blow it 1173 * away first */ 1174 if (new_de) { 1175 /* VFS didn't think there existed an inode here, but 1176 * someone else in the cluster must have raced our 1177 * rename to create one. Today we error cleanly, in 1178 * the future we should consider calling iget to build 1179 * a new struct inode for this entry. */ 1180 if (!new_inode) { 1181 status = -EACCES; 1182 1183 mlog(0, "We found an inode for name %.*s but VFS " 1184 "didn't give us one.\n", new_dentry->d_name.len, 1185 new_dentry->d_name.name); 1186 goto bail; 1187 } 1188 1189 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1190 status = -EACCES; 1191 1192 mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n", 1193 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1194 (unsigned long long)newfe_blkno, 1195 OCFS2_I(new_inode)->ip_flags); 1196 goto bail; 1197 } 1198 1199 status = ocfs2_meta_lock(new_inode, handle, &newfe_bh, 1); 1200 if (status < 0) { 1201 if (status != -ENOENT) 1202 mlog_errno(status); 1203 goto bail; 1204 } 1205 1206 if (S_ISDIR(new_inode->i_mode)) 1207 links_count = 0; 1208 else 1209 links_count = (unsigned int) (new_inode->i_nlink - 1); 1210 1211 status = ocfs2_request_unlink_vote(new_inode, new_dentry, 1212 links_count); 1213 if (status < 0) { 1214 mlog_errno(status); 1215 goto bail; 1216 } 1217 1218 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1219 1220 mlog(0, "aha rename over existing... new_de=%p new_blkno=%llu " 1221 "newfebh=%p bhblocknr=%llu\n", new_de, 1222 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1223 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1224 1225 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1226 status = ocfs2_prepare_orphan_dir(osb, handle, 1227 new_inode, 1228 orphan_name, 1229 &orphan_entry_bh); 1230 if (status < 0) { 1231 mlog_errno(status); 1232 goto bail; 1233 } 1234 } 1235 } else { 1236 BUG_ON(new_dentry->d_parent->d_inode != new_dir); 1237 1238 status = ocfs2_check_dir_for_entry(new_dir, 1239 new_dentry->d_name.name, 1240 new_dentry->d_name.len); 1241 if (status) 1242 goto bail; 1243 1244 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1245 new_dentry->d_name.name, 1246 new_dentry->d_name.len, 1247 &insert_entry_bh); 1248 if (status < 0) { 1249 mlog_errno(status); 1250 goto bail; 1251 } 1252 } 1253 1254 handle = ocfs2_start_trans(osb, handle, OCFS2_RENAME_CREDITS); 1255 if (IS_ERR(handle)) { 1256 status = PTR_ERR(handle); 1257 handle = NULL; 1258 mlog_errno(status); 1259 goto bail; 1260 } 1261 1262 if (new_de) { 1263 if (S_ISDIR(new_inode->i_mode)) { 1264 if (!ocfs2_empty_dir(new_inode) || 1265 new_inode->i_nlink != 2) { 1266 status = -ENOTEMPTY; 1267 goto bail; 1268 } 1269 } 1270 status = ocfs2_journal_access(handle, new_inode, newfe_bh, 1271 OCFS2_JOURNAL_ACCESS_WRITE); 1272 if (status < 0) { 1273 mlog_errno(status); 1274 goto bail; 1275 } 1276 1277 if (S_ISDIR(new_inode->i_mode) || 1278 (newfe->i_links_count == cpu_to_le16(1))){ 1279 status = ocfs2_orphan_add(osb, handle, new_inode, 1280 newfe, orphan_name, 1281 orphan_entry_bh); 1282 if (status < 0) { 1283 mlog_errno(status); 1284 goto bail; 1285 } 1286 } 1287 1288 /* change the dirent to point to the correct inode */ 1289 status = ocfs2_journal_access(handle, new_dir, new_de_bh, 1290 OCFS2_JOURNAL_ACCESS_WRITE); 1291 if (status < 0) { 1292 mlog_errno(status); 1293 goto bail; 1294 } 1295 new_de->inode = cpu_to_le64(OCFS2_I(old_inode)->ip_blkno); 1296 new_de->file_type = old_de->file_type; 1297 new_dir->i_version++; 1298 status = ocfs2_journal_dirty(handle, new_de_bh); 1299 if (status < 0) { 1300 mlog_errno(status); 1301 goto bail; 1302 } 1303 1304 if (S_ISDIR(new_inode->i_mode)) 1305 newfe->i_links_count = 0; 1306 else 1307 le16_add_cpu(&newfe->i_links_count, -1); 1308 1309 status = ocfs2_journal_dirty(handle, newfe_bh); 1310 if (status < 0) { 1311 mlog_errno(status); 1312 goto bail; 1313 } 1314 } else { 1315 /* if the name was not found in new_dir, add it now */ 1316 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1317 OCFS2_I(old_inode)->ip_blkno, 1318 new_dir_bh, insert_entry_bh); 1319 } 1320 1321 old_inode->i_ctime = CURRENT_TIME; 1322 mark_inode_dirty(old_inode); 1323 1324 /* now that the name has been added to new_dir, remove the old name */ 1325 status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh); 1326 if (status < 0) { 1327 mlog_errno(status); 1328 goto bail; 1329 } 1330 1331 if (new_inode) { 1332 new_inode->i_nlink--; 1333 new_inode->i_ctime = CURRENT_TIME; 1334 } 1335 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; 1336 if (old_inode_de_bh) { 1337 status = ocfs2_journal_access(handle, old_inode, 1338 old_inode_de_bh, 1339 OCFS2_JOURNAL_ACCESS_WRITE); 1340 PARENT_INO(old_inode_de_bh->b_data) = 1341 cpu_to_le64(OCFS2_I(new_dir)->ip_blkno); 1342 status = ocfs2_journal_dirty(handle, old_inode_de_bh); 1343 old_dir->i_nlink--; 1344 if (new_inode) { 1345 new_inode->i_nlink--; 1346 } else { 1347 new_dir->i_nlink++; 1348 mark_inode_dirty(new_dir); 1349 } 1350 } 1351 mark_inode_dirty(old_dir); 1352 if (new_inode) 1353 mark_inode_dirty(new_inode); 1354 1355 if (old_dir != new_dir) 1356 if (new_dir_nlink != new_dir->i_nlink) { 1357 if (!new_dir_bh) { 1358 mlog(ML_ERROR, "need to change nlink for new " 1359 "dir %llu from %d to %d but bh is NULL\n", 1360 (unsigned long long)OCFS2_I(new_dir)->ip_blkno, 1361 (int)new_dir_nlink, new_dir->i_nlink); 1362 } else { 1363 struct ocfs2_dinode *fe; 1364 status = ocfs2_journal_access(handle, 1365 new_dir, 1366 new_dir_bh, 1367 OCFS2_JOURNAL_ACCESS_WRITE); 1368 fe = (struct ocfs2_dinode *) new_dir_bh->b_data; 1369 fe->i_links_count = cpu_to_le16(new_dir->i_nlink); 1370 status = ocfs2_journal_dirty(handle, new_dir_bh); 1371 } 1372 } 1373 1374 if (old_dir_nlink != old_dir->i_nlink) { 1375 if (!old_dir_bh) { 1376 mlog(ML_ERROR, "need to change nlink for old dir " 1377 "%llu from %d to %d but bh is NULL!\n", 1378 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1379 (int)old_dir_nlink, old_dir->i_nlink); 1380 } else { 1381 struct ocfs2_dinode *fe; 1382 status = ocfs2_journal_access(handle, old_dir, 1383 old_dir_bh, 1384 OCFS2_JOURNAL_ACCESS_WRITE); 1385 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1386 fe->i_links_count = cpu_to_le16(old_dir->i_nlink); 1387 status = ocfs2_journal_dirty(handle, old_dir_bh); 1388 } 1389 } 1390 1391 status = 0; 1392 bail: 1393 if (rename_lock) 1394 ocfs2_rename_unlock(osb); 1395 1396 if (handle) 1397 ocfs2_commit_trans(handle); 1398 1399 if (new_inode) 1400 sync_mapping_buffers(old_inode->i_mapping); 1401 1402 if (new_inode) 1403 iput(new_inode); 1404 if (newfe_bh) 1405 brelse(newfe_bh); 1406 if (old_dir_bh) 1407 brelse(old_dir_bh); 1408 if (new_dir_bh) 1409 brelse(new_dir_bh); 1410 if (new_de_bh) 1411 brelse(new_de_bh); 1412 if (old_de_bh) 1413 brelse(old_de_bh); 1414 if (old_inode_de_bh) 1415 brelse(old_inode_de_bh); 1416 if (orphan_entry_bh) 1417 brelse(orphan_entry_bh); 1418 if (insert_entry_bh) 1419 brelse(insert_entry_bh); 1420 1421 mlog_exit(status); 1422 1423 return status; 1424 } 1425 1426 /* 1427 * we expect i_size = strlen(symname). Copy symname into the file 1428 * data, including the null terminator. 1429 */ 1430 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1431 struct ocfs2_journal_handle *handle, 1432 struct inode *inode, 1433 const char *symname) 1434 { 1435 struct buffer_head **bhs = NULL; 1436 const char *c; 1437 struct super_block *sb = osb->sb; 1438 u64 p_blkno; 1439 int p_blocks; 1440 int virtual, blocks, status, i, bytes_left; 1441 1442 bytes_left = i_size_read(inode) + 1; 1443 /* we can't trust i_blocks because we're actually going to 1444 * write i_size + 1 bytes. */ 1445 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1446 1447 mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n", 1448 (unsigned long long)inode->i_blocks, 1449 i_size_read(inode), blocks); 1450 1451 /* Sanity check -- make sure we're going to fit. */ 1452 if (bytes_left > 1453 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1454 status = -EIO; 1455 mlog_errno(status); 1456 goto bail; 1457 } 1458 1459 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1460 if (!bhs) { 1461 status = -ENOMEM; 1462 mlog_errno(status); 1463 goto bail; 1464 } 1465 1466 status = ocfs2_extent_map_get_blocks(inode, 0, 1, &p_blkno, 1467 &p_blocks); 1468 if (status < 0) { 1469 mlog_errno(status); 1470 goto bail; 1471 } 1472 1473 /* links can never be larger than one cluster so we know this 1474 * is all going to be contiguous, but do a sanity check 1475 * anyway. */ 1476 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1477 status = -EIO; 1478 mlog_errno(status); 1479 goto bail; 1480 } 1481 1482 virtual = 0; 1483 while(bytes_left > 0) { 1484 c = &symname[virtual * sb->s_blocksize]; 1485 1486 bhs[virtual] = sb_getblk(sb, p_blkno); 1487 if (!bhs[virtual]) { 1488 status = -ENOMEM; 1489 mlog_errno(status); 1490 goto bail; 1491 } 1492 ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]); 1493 1494 status = ocfs2_journal_access(handle, inode, bhs[virtual], 1495 OCFS2_JOURNAL_ACCESS_CREATE); 1496 if (status < 0) { 1497 mlog_errno(status); 1498 goto bail; 1499 } 1500 1501 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1502 1503 memcpy(bhs[virtual]->b_data, c, 1504 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1505 bytes_left); 1506 1507 status = ocfs2_journal_dirty(handle, bhs[virtual]); 1508 if (status < 0) { 1509 mlog_errno(status); 1510 goto bail; 1511 } 1512 1513 virtual++; 1514 p_blkno++; 1515 bytes_left -= sb->s_blocksize; 1516 } 1517 1518 status = 0; 1519 bail: 1520 1521 if (bhs) { 1522 for(i = 0; i < blocks; i++) 1523 if (bhs[i]) 1524 brelse(bhs[i]); 1525 kfree(bhs); 1526 } 1527 1528 mlog_exit(status); 1529 return status; 1530 } 1531 1532 static int ocfs2_symlink(struct inode *dir, 1533 struct dentry *dentry, 1534 const char *symname) 1535 { 1536 int status, l, credits; 1537 u64 newsize; 1538 struct ocfs2_super *osb = NULL; 1539 struct inode *inode = NULL; 1540 struct super_block *sb; 1541 struct buffer_head *new_fe_bh = NULL; 1542 struct buffer_head *de_bh = NULL; 1543 struct buffer_head *parent_fe_bh = NULL; 1544 struct ocfs2_dinode *fe = NULL; 1545 struct ocfs2_dinode *dirfe; 1546 struct ocfs2_journal_handle *handle = NULL; 1547 struct ocfs2_alloc_context *inode_ac = NULL; 1548 struct ocfs2_alloc_context *data_ac = NULL; 1549 1550 mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir, 1551 dentry, symname, dentry->d_name.len, dentry->d_name.name); 1552 1553 sb = dir->i_sb; 1554 osb = OCFS2_SB(sb); 1555 1556 l = strlen(symname) + 1; 1557 1558 credits = ocfs2_calc_symlink_credits(sb); 1559 1560 handle = ocfs2_alloc_handle(osb); 1561 if (handle == NULL) { 1562 status = -ENOMEM; 1563 mlog_errno(status); 1564 goto bail; 1565 } 1566 1567 /* lock the parent directory */ 1568 status = ocfs2_meta_lock(dir, handle, &parent_fe_bh, 1); 1569 if (status < 0) { 1570 if (status != -ENOENT) 1571 mlog_errno(status); 1572 goto bail; 1573 } 1574 1575 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1576 if (!dirfe->i_links_count) { 1577 /* can't make a file in a deleted directory. */ 1578 status = -ENOENT; 1579 goto bail; 1580 } 1581 1582 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1583 dentry->d_name.len); 1584 if (status) 1585 goto bail; 1586 1587 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1588 dentry->d_name.name, 1589 dentry->d_name.len, &de_bh); 1590 if (status < 0) { 1591 mlog_errno(status); 1592 goto bail; 1593 } 1594 1595 status = ocfs2_reserve_new_inode(osb, handle, &inode_ac); 1596 if (status < 0) { 1597 if (status != -ENOSPC) 1598 mlog_errno(status); 1599 goto bail; 1600 } 1601 1602 /* don't reserve bitmap space for fast symlinks. */ 1603 if (l > ocfs2_fast_symlink_chars(sb)) { 1604 status = ocfs2_reserve_clusters(osb, handle, 1, &data_ac); 1605 if (status < 0) { 1606 if (status != -ENOSPC) 1607 mlog_errno(status); 1608 goto bail; 1609 } 1610 } 1611 1612 handle = ocfs2_start_trans(osb, handle, credits); 1613 if (IS_ERR(handle)) { 1614 status = PTR_ERR(handle); 1615 handle = NULL; 1616 mlog_errno(status); 1617 goto bail; 1618 } 1619 1620 status = ocfs2_mknod_locked(osb, dir, dentry, 1621 S_IFLNK | S_IRWXUGO, 0, 1622 &new_fe_bh, parent_fe_bh, handle, 1623 &inode, inode_ac); 1624 if (status < 0) { 1625 mlog_errno(status); 1626 goto bail; 1627 } 1628 1629 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1630 inode->i_rdev = 0; 1631 newsize = l - 1; 1632 if (l > ocfs2_fast_symlink_chars(sb)) { 1633 inode->i_op = &ocfs2_symlink_inode_operations; 1634 status = ocfs2_do_extend_allocation(osb, inode, 1, new_fe_bh, 1635 handle, data_ac, NULL, 1636 NULL); 1637 if (status < 0) { 1638 if (status != -ENOSPC && status != -EINTR) { 1639 mlog(ML_ERROR, 1640 "Failed to extend file to %llu\n", 1641 (unsigned long long)newsize); 1642 mlog_errno(status); 1643 status = -ENOSPC; 1644 } 1645 goto bail; 1646 } 1647 i_size_write(inode, newsize); 1648 inode->i_blocks = ocfs2_align_bytes_to_sectors(newsize); 1649 } else { 1650 inode->i_op = &ocfs2_fast_symlink_inode_operations; 1651 memcpy((char *) fe->id2.i_symlink, symname, l); 1652 i_size_write(inode, newsize); 1653 inode->i_blocks = 0; 1654 } 1655 1656 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1657 if (status < 0) { 1658 mlog_errno(status); 1659 goto bail; 1660 } 1661 1662 if (!ocfs2_inode_is_fast_symlink(inode)) { 1663 status = ocfs2_create_symlink_data(osb, handle, inode, 1664 symname); 1665 if (status < 0) { 1666 mlog_errno(status); 1667 goto bail; 1668 } 1669 } 1670 1671 status = ocfs2_add_entry(handle, dentry, inode, 1672 le64_to_cpu(fe->i_blkno), parent_fe_bh, 1673 de_bh); 1674 if (status < 0) { 1675 mlog_errno(status); 1676 goto bail; 1677 } 1678 1679 insert_inode_hash(inode); 1680 dentry->d_op = &ocfs2_dentry_ops; 1681 d_instantiate(dentry, inode); 1682 bail: 1683 if (handle) 1684 ocfs2_commit_trans(handle); 1685 if (new_fe_bh) 1686 brelse(new_fe_bh); 1687 if (parent_fe_bh) 1688 brelse(parent_fe_bh); 1689 if (de_bh) 1690 brelse(de_bh); 1691 if (inode_ac) 1692 ocfs2_free_alloc_context(inode_ac); 1693 if (data_ac) 1694 ocfs2_free_alloc_context(data_ac); 1695 if ((status < 0) && inode) 1696 iput(inode); 1697 1698 mlog_exit(status); 1699 1700 return status; 1701 } 1702 1703 int ocfs2_check_dir_entry(struct inode * dir, 1704 struct ocfs2_dir_entry * de, 1705 struct buffer_head * bh, 1706 unsigned long offset) 1707 { 1708 const char *error_msg = NULL; 1709 const int rlen = le16_to_cpu(de->rec_len); 1710 1711 if (rlen < OCFS2_DIR_REC_LEN(1)) 1712 error_msg = "rec_len is smaller than minimal"; 1713 else if (rlen % 4 != 0) 1714 error_msg = "rec_len % 4 != 0"; 1715 else if (rlen < OCFS2_DIR_REC_LEN(de->name_len)) 1716 error_msg = "rec_len is too small for name_len"; 1717 else if (((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize) 1718 error_msg = "directory entry across blocks"; 1719 1720 if (error_msg != NULL) 1721 mlog(ML_ERROR, "bad entry in directory #%llu: %s - " 1722 "offset=%lu, inode=%llu, rec_len=%d, name_len=%d\n", 1723 (unsigned long long)OCFS2_I(dir)->ip_blkno, error_msg, 1724 offset, (unsigned long long)le64_to_cpu(de->inode), rlen, 1725 de->name_len); 1726 return error_msg == NULL ? 1 : 0; 1727 } 1728 1729 /* we don't always have a dentry for what we want to add, so people 1730 * like orphan dir can call this instead. 1731 * 1732 * If you pass me insert_bh, I'll skip the search of the other dir 1733 * blocks and put the record in there. 1734 */ 1735 static int __ocfs2_add_entry(struct ocfs2_journal_handle *handle, 1736 struct inode *dir, 1737 const char *name, int namelen, 1738 struct inode *inode, u64 blkno, 1739 struct buffer_head *parent_fe_bh, 1740 struct buffer_head *insert_bh) 1741 { 1742 unsigned long offset; 1743 unsigned short rec_len; 1744 struct ocfs2_dir_entry *de, *de1; 1745 struct super_block *sb; 1746 int retval, status; 1747 1748 mlog_entry_void(); 1749 1750 sb = dir->i_sb; 1751 1752 if (!namelen) 1753 return -EINVAL; 1754 1755 rec_len = OCFS2_DIR_REC_LEN(namelen); 1756 offset = 0; 1757 de = (struct ocfs2_dir_entry *) insert_bh->b_data; 1758 while (1) { 1759 BUG_ON((char *)de >= sb->s_blocksize + insert_bh->b_data); 1760 /* These checks should've already been passed by the 1761 * prepare function, but I guess we can leave them 1762 * here anyway. */ 1763 if (!ocfs2_check_dir_entry(dir, de, insert_bh, offset)) { 1764 retval = -ENOENT; 1765 goto bail; 1766 } 1767 if (ocfs2_match(namelen, name, de)) { 1768 retval = -EEXIST; 1769 goto bail; 1770 } 1771 if (((le64_to_cpu(de->inode) == 0) && 1772 (le16_to_cpu(de->rec_len) >= rec_len)) || 1773 (le16_to_cpu(de->rec_len) >= 1774 (OCFS2_DIR_REC_LEN(de->name_len) + rec_len))) { 1775 status = ocfs2_journal_access(handle, dir, insert_bh, 1776 OCFS2_JOURNAL_ACCESS_WRITE); 1777 /* By now the buffer is marked for journaling */ 1778 offset += le16_to_cpu(de->rec_len); 1779 if (le64_to_cpu(de->inode)) { 1780 de1 = (struct ocfs2_dir_entry *)((char *) de + 1781 OCFS2_DIR_REC_LEN(de->name_len)); 1782 de1->rec_len = 1783 cpu_to_le16(le16_to_cpu(de->rec_len) - 1784 OCFS2_DIR_REC_LEN(de->name_len)); 1785 de->rec_len = cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len)); 1786 de = de1; 1787 } 1788 de->file_type = OCFS2_FT_UNKNOWN; 1789 if (blkno) { 1790 de->inode = cpu_to_le64(blkno); 1791 ocfs2_set_de_type(de, inode->i_mode); 1792 } else 1793 de->inode = 0; 1794 de->name_len = namelen; 1795 memcpy(de->name, name, namelen); 1796 1797 dir->i_mtime = dir->i_ctime = CURRENT_TIME; 1798 dir->i_version++; 1799 status = ocfs2_journal_dirty(handle, insert_bh); 1800 retval = 0; 1801 goto bail; 1802 } 1803 offset += le16_to_cpu(de->rec_len); 1804 de = (struct ocfs2_dir_entry *) ((char *) de + le16_to_cpu(de->rec_len)); 1805 } 1806 1807 /* when you think about it, the assert above should prevent us 1808 * from ever getting here. */ 1809 retval = -ENOSPC; 1810 bail: 1811 1812 mlog_exit(retval); 1813 return retval; 1814 } 1815 1816 1817 /* 1818 * ocfs2_delete_entry deletes a directory entry by merging it with the 1819 * previous entry 1820 */ 1821 static int ocfs2_delete_entry(struct ocfs2_journal_handle *handle, 1822 struct inode *dir, 1823 struct ocfs2_dir_entry *de_del, 1824 struct buffer_head *bh) 1825 { 1826 struct ocfs2_dir_entry *de, *pde; 1827 int i, status = -ENOENT; 1828 1829 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p)\n", handle, dir, de_del, bh); 1830 1831 i = 0; 1832 pde = NULL; 1833 de = (struct ocfs2_dir_entry *) bh->b_data; 1834 while (i < bh->b_size) { 1835 if (!ocfs2_check_dir_entry(dir, de, bh, i)) { 1836 status = -EIO; 1837 mlog_errno(status); 1838 goto bail; 1839 } 1840 if (de == de_del) { 1841 status = ocfs2_journal_access(handle, dir, bh, 1842 OCFS2_JOURNAL_ACCESS_WRITE); 1843 if (status < 0) { 1844 status = -EIO; 1845 mlog_errno(status); 1846 goto bail; 1847 } 1848 if (pde) 1849 pde->rec_len = 1850 cpu_to_le16(le16_to_cpu(pde->rec_len) + 1851 le16_to_cpu(de->rec_len)); 1852 else 1853 de->inode = 0; 1854 dir->i_version++; 1855 status = ocfs2_journal_dirty(handle, bh); 1856 goto bail; 1857 } 1858 i += le16_to_cpu(de->rec_len); 1859 pde = de; 1860 de = (struct ocfs2_dir_entry *)((char *)de + le16_to_cpu(de->rec_len)); 1861 } 1862 bail: 1863 mlog_exit(status); 1864 return status; 1865 } 1866 1867 /* 1868 * Returns 0 if not found, -1 on failure, and 1 on success 1869 */ 1870 static int inline ocfs2_search_dirblock(struct buffer_head *bh, 1871 struct inode *dir, 1872 const char *name, int namelen, 1873 unsigned long offset, 1874 struct ocfs2_dir_entry **res_dir) 1875 { 1876 struct ocfs2_dir_entry *de; 1877 char *dlimit, *de_buf; 1878 int de_len; 1879 int ret = 0; 1880 1881 mlog_entry_void(); 1882 1883 de_buf = bh->b_data; 1884 dlimit = de_buf + dir->i_sb->s_blocksize; 1885 1886 while (de_buf < dlimit) { 1887 /* this code is executed quadratically often */ 1888 /* do minimal checking `by hand' */ 1889 1890 de = (struct ocfs2_dir_entry *) de_buf; 1891 1892 if (de_buf + namelen <= dlimit && 1893 ocfs2_match(namelen, name, de)) { 1894 /* found a match - just to be sure, do a full check */ 1895 if (!ocfs2_check_dir_entry(dir, de, bh, offset)) { 1896 ret = -1; 1897 goto bail; 1898 } 1899 *res_dir = de; 1900 ret = 1; 1901 goto bail; 1902 } 1903 1904 /* prevent looping on a bad block */ 1905 de_len = le16_to_cpu(de->rec_len); 1906 if (de_len <= 0) { 1907 ret = -1; 1908 goto bail; 1909 } 1910 1911 de_buf += de_len; 1912 offset += de_len; 1913 } 1914 1915 bail: 1916 mlog_exit(ret); 1917 return ret; 1918 } 1919 1920 struct buffer_head *ocfs2_find_entry(const char *name, int namelen, 1921 struct inode *dir, 1922 struct ocfs2_dir_entry **res_dir) 1923 { 1924 struct super_block *sb; 1925 struct buffer_head *bh_use[NAMEI_RA_SIZE]; 1926 struct buffer_head *bh, *ret = NULL; 1927 unsigned long start, block, b; 1928 int ra_max = 0; /* Number of bh's in the readahead 1929 buffer, bh_use[] */ 1930 int ra_ptr = 0; /* Current index into readahead 1931 buffer */ 1932 int num = 0; 1933 int nblocks, i, err; 1934 1935 mlog_entry_void(); 1936 1937 *res_dir = NULL; 1938 sb = dir->i_sb; 1939 1940 nblocks = i_size_read(dir) >> sb->s_blocksize_bits; 1941 start = OCFS2_I(dir)->ip_dir_start_lookup; 1942 if (start >= nblocks) 1943 start = 0; 1944 block = start; 1945 1946 restart: 1947 do { 1948 /* 1949 * We deal with the read-ahead logic here. 1950 */ 1951 if (ra_ptr >= ra_max) { 1952 /* Refill the readahead buffer */ 1953 ra_ptr = 0; 1954 b = block; 1955 for (ra_max = 0; ra_max < NAMEI_RA_SIZE; ra_max++) { 1956 /* 1957 * Terminate if we reach the end of the 1958 * directory and must wrap, or if our 1959 * search has finished at this block. 1960 */ 1961 if (b >= nblocks || (num && block == start)) { 1962 bh_use[ra_max] = NULL; 1963 break; 1964 } 1965 num++; 1966 1967 /* XXX: questionable readahead stuff here */ 1968 bh = ocfs2_bread(dir, b++, &err, 1); 1969 bh_use[ra_max] = bh; 1970 #if 0 // ??? 1971 if (bh) 1972 ll_rw_block(READ, 1, &bh); 1973 #endif 1974 } 1975 } 1976 if ((bh = bh_use[ra_ptr++]) == NULL) 1977 goto next; 1978 wait_on_buffer(bh); 1979 if (!buffer_uptodate(bh)) { 1980 /* read error, skip block & hope for the best */ 1981 brelse(bh); 1982 goto next; 1983 } 1984 i = ocfs2_search_dirblock(bh, dir, name, namelen, 1985 block << sb->s_blocksize_bits, 1986 res_dir); 1987 if (i == 1) { 1988 OCFS2_I(dir)->ip_dir_start_lookup = block; 1989 ret = bh; 1990 goto cleanup_and_exit; 1991 } else { 1992 brelse(bh); 1993 if (i < 0) 1994 goto cleanup_and_exit; 1995 } 1996 next: 1997 if (++block >= nblocks) 1998 block = 0; 1999 } while (block != start); 2000 2001 /* 2002 * If the directory has grown while we were searching, then 2003 * search the last part of the directory before giving up. 2004 */ 2005 block = nblocks; 2006 nblocks = i_size_read(dir) >> sb->s_blocksize_bits; 2007 if (block < nblocks) { 2008 start = 0; 2009 goto restart; 2010 } 2011 2012 cleanup_and_exit: 2013 /* Clean up the read-ahead blocks */ 2014 for (; ra_ptr < ra_max; ra_ptr++) 2015 brelse(bh_use[ra_ptr]); 2016 2017 mlog_exit_ptr(ret); 2018 return ret; 2019 } 2020 2021 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2022 { 2023 int status, namelen; 2024 2025 mlog_entry_void(); 2026 2027 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2028 (long long)blkno); 2029 if (namelen <= 0) { 2030 if (namelen) 2031 status = namelen; 2032 else 2033 status = -EINVAL; 2034 mlog_errno(status); 2035 goto bail; 2036 } 2037 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2038 status = -EINVAL; 2039 mlog_errno(status); 2040 goto bail; 2041 } 2042 2043 mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name, 2044 namelen); 2045 2046 status = 0; 2047 bail: 2048 mlog_exit(status); 2049 return status; 2050 } 2051 2052 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2053 struct ocfs2_journal_handle *handle, 2054 struct inode *inode, 2055 char *name, 2056 struct buffer_head **de_bh) 2057 { 2058 struct inode *orphan_dir_inode = NULL; 2059 struct buffer_head *orphan_dir_bh = NULL; 2060 int status = 0; 2061 2062 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2063 if (status < 0) { 2064 mlog_errno(status); 2065 goto leave; 2066 } 2067 2068 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2069 ORPHAN_DIR_SYSTEM_INODE, 2070 osb->slot_num); 2071 if (!orphan_dir_inode) { 2072 status = -ENOENT; 2073 mlog_errno(status); 2074 goto leave; 2075 } 2076 2077 ocfs2_handle_add_inode(handle, orphan_dir_inode); 2078 status = ocfs2_meta_lock(orphan_dir_inode, handle, &orphan_dir_bh, 1); 2079 if (status < 0) { 2080 mlog_errno(status); 2081 goto leave; 2082 } 2083 2084 status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2085 orphan_dir_bh, name, 2086 OCFS2_ORPHAN_NAMELEN, de_bh); 2087 if (status < 0) { 2088 mlog_errno(status); 2089 goto leave; 2090 } 2091 2092 leave: 2093 if (orphan_dir_inode) 2094 iput(orphan_dir_inode); 2095 2096 if (orphan_dir_bh) 2097 brelse(orphan_dir_bh); 2098 2099 mlog_exit(status); 2100 return status; 2101 } 2102 2103 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2104 struct ocfs2_journal_handle *handle, 2105 struct inode *inode, 2106 struct ocfs2_dinode *fe, 2107 char *name, 2108 struct buffer_head *de_bh) 2109 { 2110 struct inode *orphan_dir_inode = NULL; 2111 struct buffer_head *orphan_dir_bh = NULL; 2112 int status = 0; 2113 struct ocfs2_dinode *orphan_fe; 2114 2115 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino); 2116 2117 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2118 ORPHAN_DIR_SYSTEM_INODE, 2119 osb->slot_num); 2120 if (!orphan_dir_inode) { 2121 status = -ENOENT; 2122 mlog_errno(status); 2123 goto leave; 2124 } 2125 2126 status = ocfs2_read_block(osb, 2127 OCFS2_I(orphan_dir_inode)->ip_blkno, 2128 &orphan_dir_bh, OCFS2_BH_CACHED, 2129 orphan_dir_inode); 2130 if (status < 0) { 2131 mlog_errno(status); 2132 goto leave; 2133 } 2134 2135 status = ocfs2_journal_access(handle, orphan_dir_inode, orphan_dir_bh, 2136 OCFS2_JOURNAL_ACCESS_WRITE); 2137 if (status < 0) { 2138 mlog_errno(status); 2139 goto leave; 2140 } 2141 2142 /* we're a cluster, and nlink can change on disk from 2143 * underneath us... */ 2144 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2145 if (S_ISDIR(inode->i_mode)) 2146 le16_add_cpu(&orphan_fe->i_links_count, 1); 2147 orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); 2148 2149 status = ocfs2_journal_dirty(handle, orphan_dir_bh); 2150 if (status < 0) { 2151 mlog_errno(status); 2152 goto leave; 2153 } 2154 2155 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2156 OCFS2_ORPHAN_NAMELEN, inode, 2157 OCFS2_I(inode)->ip_blkno, 2158 orphan_dir_bh, de_bh); 2159 if (status < 0) { 2160 mlog_errno(status); 2161 goto leave; 2162 } 2163 2164 le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL); 2165 2166 /* Record which orphan dir our inode now resides 2167 * in. delete_inode will use this to determine which orphan 2168 * dir to lock. */ 2169 spin_lock(&OCFS2_I(inode)->ip_lock); 2170 OCFS2_I(inode)->ip_orphaned_slot = osb->slot_num; 2171 spin_unlock(&OCFS2_I(inode)->ip_lock); 2172 2173 mlog(0, "Inode %llu orphaned in slot %d\n", 2174 (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num); 2175 2176 leave: 2177 if (orphan_dir_inode) 2178 iput(orphan_dir_inode); 2179 2180 if (orphan_dir_bh) 2181 brelse(orphan_dir_bh); 2182 2183 mlog_exit(status); 2184 return status; 2185 } 2186 2187 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2188 int ocfs2_orphan_del(struct ocfs2_super *osb, 2189 struct ocfs2_journal_handle *handle, 2190 struct inode *orphan_dir_inode, 2191 struct inode *inode, 2192 struct buffer_head *orphan_dir_bh) 2193 { 2194 char name[OCFS2_ORPHAN_NAMELEN + 1]; 2195 struct ocfs2_dinode *orphan_fe; 2196 int status = 0; 2197 struct buffer_head *target_de_bh = NULL; 2198 struct ocfs2_dir_entry *target_de = NULL; 2199 2200 mlog_entry_void(); 2201 2202 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2203 if (status < 0) { 2204 mlog_errno(status); 2205 goto leave; 2206 } 2207 2208 mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n", 2209 name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2210 OCFS2_ORPHAN_NAMELEN); 2211 2212 /* find it's spot in the orphan directory */ 2213 target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, 2214 orphan_dir_inode, &target_de); 2215 if (!target_de_bh) { 2216 status = -ENOENT; 2217 mlog_errno(status); 2218 goto leave; 2219 } 2220 2221 /* remove it from the orphan directory */ 2222 status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de, 2223 target_de_bh); 2224 if (status < 0) { 2225 mlog_errno(status); 2226 goto leave; 2227 } 2228 2229 status = ocfs2_journal_access(handle,orphan_dir_inode, orphan_dir_bh, 2230 OCFS2_JOURNAL_ACCESS_WRITE); 2231 if (status < 0) { 2232 mlog_errno(status); 2233 goto leave; 2234 } 2235 2236 /* do the i_nlink dance! :) */ 2237 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2238 if (S_ISDIR(inode->i_mode)) 2239 le16_add_cpu(&orphan_fe->i_links_count, -1); 2240 orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); 2241 2242 status = ocfs2_journal_dirty(handle, orphan_dir_bh); 2243 if (status < 0) { 2244 mlog_errno(status); 2245 goto leave; 2246 } 2247 2248 leave: 2249 if (target_de_bh) 2250 brelse(target_de_bh); 2251 2252 mlog_exit(status); 2253 return status; 2254 } 2255 2256 struct inode_operations ocfs2_dir_iops = { 2257 .create = ocfs2_create, 2258 .lookup = ocfs2_lookup, 2259 .link = ocfs2_link, 2260 .unlink = ocfs2_unlink, 2261 .rmdir = ocfs2_unlink, 2262 .symlink = ocfs2_symlink, 2263 .mkdir = ocfs2_mkdir, 2264 .mknod = ocfs2_mknod, 2265 .rename = ocfs2_rename, 2266 .setattr = ocfs2_setattr, 2267 .getattr = ocfs2_getattr, 2268 }; 2269