1 /* 2 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README 3 * 4 * Trivial changes by Alan Cox to add the LFS fixes 5 * 6 * Trivial Changes: 7 * Rights granted to Hans Reiser to redistribute under other terms providing 8 * he accepts all liability including but not limited to patent, fitness 9 * for purpose, and direct or indirect claims arising from failure to perform. 10 * 11 * NO WARRANTY 12 */ 13 14 #include <linux/module.h> 15 #include <linux/slab.h> 16 #include <linux/vmalloc.h> 17 #include <linux/time.h> 18 #include <linux/uaccess.h> 19 #include "reiserfs.h" 20 #include "acl.h" 21 #include "xattr.h" 22 #include <linux/init.h> 23 #include <linux/blkdev.h> 24 #include <linux/backing-dev.h> 25 #include <linux/buffer_head.h> 26 #include <linux/exportfs.h> 27 #include <linux/quotaops.h> 28 #include <linux/vfs.h> 29 #include <linux/mount.h> 30 #include <linux/namei.h> 31 #include <linux/crc32.h> 32 #include <linux/seq_file.h> 33 34 struct file_system_type reiserfs_fs_type; 35 36 static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING; 37 static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING; 38 static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING; 39 40 int is_reiserfs_3_5(struct reiserfs_super_block *rs) 41 { 42 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string, 43 strlen(reiserfs_3_5_magic_string)); 44 } 45 46 int is_reiserfs_3_6(struct reiserfs_super_block *rs) 47 { 48 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string, 49 strlen(reiserfs_3_6_magic_string)); 50 } 51 52 int is_reiserfs_jr(struct reiserfs_super_block *rs) 53 { 54 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string, 55 strlen(reiserfs_jr_magic_string)); 56 } 57 58 static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs) 59 { 60 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) || 61 is_reiserfs_jr(rs)); 62 } 63 64 static int reiserfs_remount(struct super_block *s, int *flags, char *data); 65 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf); 66 67 static int reiserfs_sync_fs(struct super_block *s, int wait) 68 { 69 struct reiserfs_transaction_handle th; 70 71 /* 72 * Writeback quota in non-journalled quota case - journalled quota has 73 * no dirty dquots 74 */ 75 dquot_writeback_dquots(s, -1); 76 reiserfs_write_lock(s); 77 if (!journal_begin(&th, s, 1)) 78 if (!journal_end_sync(&th)) 79 reiserfs_flush_old_commits(s); 80 reiserfs_write_unlock(s); 81 return 0; 82 } 83 84 static void flush_old_commits(struct work_struct *work) 85 { 86 struct reiserfs_sb_info *sbi; 87 struct super_block *s; 88 89 sbi = container_of(work, struct reiserfs_sb_info, old_work.work); 90 s = sbi->s_journal->j_work_sb; 91 92 /* 93 * We need s_umount for protecting quota writeback. We have to use 94 * trylock as reiserfs_cancel_old_flush() may be waiting for this work 95 * to complete with s_umount held. 96 */ 97 if (!down_read_trylock(&s->s_umount)) { 98 /* Requeue work if we are not cancelling it */ 99 spin_lock(&sbi->old_work_lock); 100 if (sbi->work_queued == 1) 101 queue_delayed_work(system_long_wq, &sbi->old_work, HZ); 102 spin_unlock(&sbi->old_work_lock); 103 return; 104 } 105 spin_lock(&sbi->old_work_lock); 106 /* Avoid clobbering the cancel state... */ 107 if (sbi->work_queued == 1) 108 sbi->work_queued = 0; 109 spin_unlock(&sbi->old_work_lock); 110 111 reiserfs_sync_fs(s, 1); 112 up_read(&s->s_umount); 113 } 114 115 void reiserfs_schedule_old_flush(struct super_block *s) 116 { 117 struct reiserfs_sb_info *sbi = REISERFS_SB(s); 118 unsigned long delay; 119 120 /* 121 * Avoid scheduling flush when sb is being shut down. It can race 122 * with journal shutdown and free still queued delayed work. 123 */ 124 if (sb_rdonly(s) || !(s->s_flags & SB_ACTIVE)) 125 return; 126 127 spin_lock(&sbi->old_work_lock); 128 if (!sbi->work_queued) { 129 delay = msecs_to_jiffies(dirty_writeback_interval * 10); 130 queue_delayed_work(system_long_wq, &sbi->old_work, delay); 131 sbi->work_queued = 1; 132 } 133 spin_unlock(&sbi->old_work_lock); 134 } 135 136 void reiserfs_cancel_old_flush(struct super_block *s) 137 { 138 struct reiserfs_sb_info *sbi = REISERFS_SB(s); 139 140 spin_lock(&sbi->old_work_lock); 141 /* Make sure no new flushes will be queued */ 142 sbi->work_queued = 2; 143 spin_unlock(&sbi->old_work_lock); 144 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work); 145 } 146 147 static int reiserfs_freeze(struct super_block *s) 148 { 149 struct reiserfs_transaction_handle th; 150 151 reiserfs_cancel_old_flush(s); 152 153 reiserfs_write_lock(s); 154 if (!sb_rdonly(s)) { 155 int err = journal_begin(&th, s, 1); 156 if (err) { 157 reiserfs_block_writes(&th); 158 } else { 159 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 160 1); 161 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); 162 reiserfs_block_writes(&th); 163 journal_end_sync(&th); 164 } 165 } 166 reiserfs_write_unlock(s); 167 return 0; 168 } 169 170 static int reiserfs_unfreeze(struct super_block *s) 171 { 172 struct reiserfs_sb_info *sbi = REISERFS_SB(s); 173 174 reiserfs_allow_writes(s); 175 spin_lock(&sbi->old_work_lock); 176 /* Allow old_work to run again */ 177 sbi->work_queued = 0; 178 spin_unlock(&sbi->old_work_lock); 179 return 0; 180 } 181 182 extern const struct in_core_key MAX_IN_CORE_KEY; 183 184 /* 185 * this is used to delete "save link" when there are no items of a 186 * file it points to. It can either happen if unlink is completed but 187 * "save unlink" removal, or if file has both unlink and truncate 188 * pending and as unlink completes first (because key of "save link" 189 * protecting unlink is bigger that a key lf "save link" which 190 * protects truncate), so there left no items to make truncate 191 * completion on 192 */ 193 static int remove_save_link_only(struct super_block *s, 194 struct reiserfs_key *key, int oid_free) 195 { 196 struct reiserfs_transaction_handle th; 197 int err; 198 199 /* we are going to do one balancing */ 200 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT); 201 if (err) 202 return err; 203 204 reiserfs_delete_solid_item(&th, NULL, key); 205 if (oid_free) 206 /* removals are protected by direct items */ 207 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid)); 208 209 return journal_end(&th); 210 } 211 212 #ifdef CONFIG_QUOTA 213 static int reiserfs_quota_on_mount(struct super_block *, int); 214 #endif 215 216 /* 217 * Look for uncompleted unlinks and truncates and complete them 218 * 219 * Called with superblock write locked. If quotas are enabled, we have to 220 * release/retake lest we call dquot_quota_on_mount(), proceed to 221 * schedule_on_each_cpu() in invalidate_bdev() and deadlock waiting for the per 222 * cpu worklets to complete flush_async_commits() that in turn wait for the 223 * superblock write lock. 224 */ 225 static int finish_unfinished(struct super_block *s) 226 { 227 INITIALIZE_PATH(path); 228 struct cpu_key max_cpu_key, obj_key; 229 struct reiserfs_key save_link_key, last_inode_key; 230 int retval = 0; 231 struct item_head *ih; 232 struct buffer_head *bh; 233 int item_pos; 234 char *item; 235 int done; 236 struct inode *inode; 237 int truncate; 238 #ifdef CONFIG_QUOTA 239 int i; 240 int ms_active_set; 241 int quota_enabled[REISERFS_MAXQUOTAS]; 242 #endif 243 244 /* compose key to look for "save" links */ 245 max_cpu_key.version = KEY_FORMAT_3_5; 246 max_cpu_key.on_disk_key.k_dir_id = ~0U; 247 max_cpu_key.on_disk_key.k_objectid = ~0U; 248 set_cpu_key_k_offset(&max_cpu_key, ~0U); 249 max_cpu_key.key_length = 3; 250 251 memset(&last_inode_key, 0, sizeof(last_inode_key)); 252 253 #ifdef CONFIG_QUOTA 254 /* Needed for iput() to work correctly and not trash data */ 255 if (s->s_flags & SB_ACTIVE) { 256 ms_active_set = 0; 257 } else { 258 ms_active_set = 1; 259 s->s_flags |= SB_ACTIVE; 260 } 261 /* Turn on quotas so that they are updated correctly */ 262 for (i = 0; i < REISERFS_MAXQUOTAS; i++) { 263 quota_enabled[i] = 1; 264 if (REISERFS_SB(s)->s_qf_names[i]) { 265 int ret; 266 267 if (sb_has_quota_active(s, i)) { 268 quota_enabled[i] = 0; 269 continue; 270 } 271 reiserfs_write_unlock(s); 272 ret = reiserfs_quota_on_mount(s, i); 273 reiserfs_write_lock(s); 274 if (ret < 0) 275 reiserfs_warning(s, "reiserfs-2500", 276 "cannot turn on journaled " 277 "quota: error %d", ret); 278 } 279 } 280 #endif 281 282 done = 0; 283 REISERFS_SB(s)->s_is_unlinked_ok = 1; 284 while (!retval) { 285 int depth; 286 retval = search_item(s, &max_cpu_key, &path); 287 if (retval != ITEM_NOT_FOUND) { 288 reiserfs_error(s, "vs-2140", 289 "search_by_key returned %d", retval); 290 break; 291 } 292 293 bh = get_last_bh(&path); 294 item_pos = get_item_pos(&path); 295 if (item_pos != B_NR_ITEMS(bh)) { 296 reiserfs_warning(s, "vs-2060", 297 "wrong position found"); 298 break; 299 } 300 item_pos--; 301 ih = item_head(bh, item_pos); 302 303 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) 304 /* there are no "save" links anymore */ 305 break; 306 307 save_link_key = ih->ih_key; 308 if (is_indirect_le_ih(ih)) 309 truncate = 1; 310 else 311 truncate = 0; 312 313 /* reiserfs_iget needs k_dirid and k_objectid only */ 314 item = ih_item_body(bh, ih); 315 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item); 316 obj_key.on_disk_key.k_objectid = 317 le32_to_cpu(ih->ih_key.k_objectid); 318 obj_key.on_disk_key.k_offset = 0; 319 obj_key.on_disk_key.k_type = 0; 320 321 pathrelse(&path); 322 323 inode = reiserfs_iget(s, &obj_key); 324 if (IS_ERR_OR_NULL(inode)) { 325 /* 326 * the unlink almost completed, it just did not 327 * manage to remove "save" link and release objectid 328 */ 329 reiserfs_warning(s, "vs-2180", "iget failed for %K", 330 &obj_key); 331 retval = remove_save_link_only(s, &save_link_key, 1); 332 continue; 333 } 334 335 if (!truncate && inode->i_nlink) { 336 /* file is not unlinked */ 337 reiserfs_warning(s, "vs-2185", 338 "file %K is not unlinked", 339 &obj_key); 340 retval = remove_save_link_only(s, &save_link_key, 0); 341 continue; 342 } 343 depth = reiserfs_write_unlock_nested(inode->i_sb); 344 dquot_initialize(inode); 345 reiserfs_write_lock_nested(inode->i_sb, depth); 346 347 if (truncate && S_ISDIR(inode->i_mode)) { 348 /* 349 * We got a truncate request for a dir which 350 * is impossible. The only imaginable way is to 351 * execute unfinished truncate request then boot 352 * into old kernel, remove the file and create dir 353 * with the same key. 354 */ 355 reiserfs_warning(s, "green-2101", 356 "impossible truncate on a " 357 "directory %k. Please report", 358 INODE_PKEY(inode)); 359 retval = remove_save_link_only(s, &save_link_key, 0); 360 truncate = 0; 361 iput(inode); 362 continue; 363 } 364 365 if (truncate) { 366 REISERFS_I(inode)->i_flags |= 367 i_link_saved_truncate_mask; 368 /* 369 * not completed truncate found. New size was 370 * committed together with "save" link 371 */ 372 reiserfs_info(s, "Truncating %k to %lld ..", 373 INODE_PKEY(inode), inode->i_size); 374 375 /* don't update modification time */ 376 reiserfs_truncate_file(inode, 0); 377 378 retval = remove_save_link(inode, truncate); 379 } else { 380 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; 381 /* not completed unlink (rmdir) found */ 382 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode)); 383 if (memcmp(&last_inode_key, INODE_PKEY(inode), 384 sizeof(last_inode_key))){ 385 last_inode_key = *INODE_PKEY(inode); 386 /* removal gets completed in iput */ 387 retval = 0; 388 } else { 389 reiserfs_warning(s, "super-2189", "Dead loop " 390 "in finish_unfinished " 391 "detected, just remove " 392 "save link\n"); 393 retval = remove_save_link_only(s, 394 &save_link_key, 0); 395 } 396 } 397 398 iput(inode); 399 printk("done\n"); 400 done++; 401 } 402 REISERFS_SB(s)->s_is_unlinked_ok = 0; 403 404 #ifdef CONFIG_QUOTA 405 /* Turn quotas off */ 406 reiserfs_write_unlock(s); 407 for (i = 0; i < REISERFS_MAXQUOTAS; i++) { 408 if (sb_dqopt(s)->files[i] && quota_enabled[i]) 409 dquot_quota_off(s, i); 410 } 411 reiserfs_write_lock(s); 412 if (ms_active_set) 413 /* Restore the flag back */ 414 s->s_flags &= ~SB_ACTIVE; 415 #endif 416 pathrelse(&path); 417 if (done) 418 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. " 419 "Completed\n", done); 420 return retval; 421 } 422 423 /* 424 * to protect file being unlinked from getting lost we "safe" link files 425 * being unlinked. This link will be deleted in the same transaction with last 426 * item of file. mounting the filesystem we scan all these links and remove 427 * files which almost got lost 428 */ 429 void add_save_link(struct reiserfs_transaction_handle *th, 430 struct inode *inode, int truncate) 431 { 432 INITIALIZE_PATH(path); 433 int retval; 434 struct cpu_key key; 435 struct item_head ih; 436 __le32 link; 437 438 BUG_ON(!th->t_trans_id); 439 440 /* file can only get one "save link" of each kind */ 441 RFALSE(truncate && 442 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask), 443 "saved link already exists for truncated inode %lx", 444 (long)inode->i_ino); 445 RFALSE(!truncate && 446 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask), 447 "saved link already exists for unlinked inode %lx", 448 (long)inode->i_ino); 449 450 /* setup key of "save" link */ 451 key.version = KEY_FORMAT_3_5; 452 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; 453 key.on_disk_key.k_objectid = inode->i_ino; 454 if (!truncate) { 455 /* unlink, rmdir, rename */ 456 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize); 457 set_cpu_key_k_type(&key, TYPE_DIRECT); 458 459 /* item head of "safe" link */ 460 make_le_item_head(&ih, &key, key.version, 461 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, 462 4 /*length */ , 0xffff /*free space */ ); 463 } else { 464 /* truncate */ 465 if (S_ISDIR(inode->i_mode)) 466 reiserfs_warning(inode->i_sb, "green-2102", 467 "Adding a truncate savelink for " 468 "a directory %k! Please report", 469 INODE_PKEY(inode)); 470 set_cpu_key_k_offset(&key, 1); 471 set_cpu_key_k_type(&key, TYPE_INDIRECT); 472 473 /* item head of "safe" link */ 474 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT, 475 4 /*length */ , 0 /*free space */ ); 476 } 477 key.key_length = 3; 478 479 /* look for its place in the tree */ 480 retval = search_item(inode->i_sb, &key, &path); 481 if (retval != ITEM_NOT_FOUND) { 482 if (retval != -ENOSPC) 483 reiserfs_error(inode->i_sb, "vs-2100", 484 "search_by_key (%K) returned %d", &key, 485 retval); 486 pathrelse(&path); 487 return; 488 } 489 490 /* body of "save" link */ 491 link = INODE_PKEY(inode)->k_dir_id; 492 493 /* put "save" link into tree, don't charge quota to anyone */ 494 retval = 495 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link); 496 if (retval) { 497 if (retval != -ENOSPC) 498 reiserfs_error(inode->i_sb, "vs-2120", 499 "insert_item returned %d", retval); 500 } else { 501 if (truncate) 502 REISERFS_I(inode)->i_flags |= 503 i_link_saved_truncate_mask; 504 else 505 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; 506 } 507 } 508 509 /* this opens transaction unlike add_save_link */ 510 int remove_save_link(struct inode *inode, int truncate) 511 { 512 struct reiserfs_transaction_handle th; 513 struct reiserfs_key key; 514 int err; 515 516 /* we are going to do one balancing only */ 517 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); 518 if (err) 519 return err; 520 521 /* setup key of "save" link */ 522 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID); 523 key.k_objectid = INODE_PKEY(inode)->k_objectid; 524 if (!truncate) { 525 /* unlink, rmdir, rename */ 526 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 527 1 + inode->i_sb->s_blocksize); 528 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT); 529 } else { 530 /* truncate */ 531 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1); 532 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT); 533 } 534 535 if ((truncate && 536 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) || 537 (!truncate && 538 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask))) 539 /* don't take quota bytes from anywhere */ 540 reiserfs_delete_solid_item(&th, NULL, &key); 541 if (!truncate) { 542 reiserfs_release_objectid(&th, inode->i_ino); 543 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask; 544 } else 545 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask; 546 547 return journal_end(&th); 548 } 549 550 static void reiserfs_kill_sb(struct super_block *s) 551 { 552 if (REISERFS_SB(s)) { 553 reiserfs_proc_info_done(s); 554 /* 555 * Force any pending inode evictions to occur now. Any 556 * inodes to be removed that have extended attributes 557 * associated with them need to clean them up before 558 * we can release the extended attribute root dentries. 559 * shrink_dcache_for_umount will BUG if we don't release 560 * those before it's called so ->put_super is too late. 561 */ 562 shrink_dcache_sb(s); 563 564 dput(REISERFS_SB(s)->xattr_root); 565 REISERFS_SB(s)->xattr_root = NULL; 566 dput(REISERFS_SB(s)->priv_root); 567 REISERFS_SB(s)->priv_root = NULL; 568 } 569 570 kill_block_super(s); 571 } 572 573 #ifdef CONFIG_QUOTA 574 static int reiserfs_quota_off(struct super_block *sb, int type); 575 576 static void reiserfs_quota_off_umount(struct super_block *s) 577 { 578 int type; 579 580 for (type = 0; type < REISERFS_MAXQUOTAS; type++) 581 reiserfs_quota_off(s, type); 582 } 583 #else 584 static inline void reiserfs_quota_off_umount(struct super_block *s) 585 { 586 } 587 #endif 588 589 static void reiserfs_put_super(struct super_block *s) 590 { 591 struct reiserfs_transaction_handle th; 592 th.t_trans_id = 0; 593 594 reiserfs_quota_off_umount(s); 595 596 reiserfs_write_lock(s); 597 598 /* 599 * change file system state to current state if it was mounted 600 * with read-write permissions 601 */ 602 if (!sb_rdonly(s)) { 603 if (!journal_begin(&th, s, 10)) { 604 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 605 1); 606 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s), 607 REISERFS_SB(s)->s_mount_state); 608 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); 609 } 610 } 611 612 /* 613 * note, journal_release checks for readonly mount, and can 614 * decide not to do a journal_end 615 */ 616 journal_release(&th, s); 617 618 reiserfs_free_bitmap_cache(s); 619 620 brelse(SB_BUFFER_WITH_SB(s)); 621 622 print_statistics(s); 623 624 if (REISERFS_SB(s)->reserved_blocks != 0) { 625 reiserfs_warning(s, "green-2005", "reserved blocks left %d", 626 REISERFS_SB(s)->reserved_blocks); 627 } 628 629 reiserfs_write_unlock(s); 630 mutex_destroy(&REISERFS_SB(s)->lock); 631 destroy_workqueue(REISERFS_SB(s)->commit_wq); 632 kfree(REISERFS_SB(s)->s_jdev); 633 kfree(s->s_fs_info); 634 s->s_fs_info = NULL; 635 } 636 637 static struct kmem_cache *reiserfs_inode_cachep; 638 639 static struct inode *reiserfs_alloc_inode(struct super_block *sb) 640 { 641 struct reiserfs_inode_info *ei; 642 ei = alloc_inode_sb(sb, reiserfs_inode_cachep, GFP_KERNEL); 643 if (!ei) 644 return NULL; 645 atomic_set(&ei->openers, 0); 646 mutex_init(&ei->tailpack); 647 #ifdef CONFIG_QUOTA 648 memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 649 #endif 650 651 return &ei->vfs_inode; 652 } 653 654 static void reiserfs_free_inode(struct inode *inode) 655 { 656 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); 657 } 658 659 static void init_once(void *foo) 660 { 661 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo; 662 663 INIT_LIST_HEAD(&ei->i_prealloc_list); 664 inode_init_once(&ei->vfs_inode); 665 } 666 667 static int __init init_inodecache(void) 668 { 669 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", 670 sizeof(struct 671 reiserfs_inode_info), 672 0, (SLAB_RECLAIM_ACCOUNT| 673 SLAB_MEM_SPREAD| 674 SLAB_ACCOUNT), 675 init_once); 676 if (reiserfs_inode_cachep == NULL) 677 return -ENOMEM; 678 return 0; 679 } 680 681 static void destroy_inodecache(void) 682 { 683 /* 684 * Make sure all delayed rcu free inodes are flushed before we 685 * destroy cache. 686 */ 687 rcu_barrier(); 688 kmem_cache_destroy(reiserfs_inode_cachep); 689 } 690 691 /* we don't mark inodes dirty, we just log them */ 692 static void reiserfs_dirty_inode(struct inode *inode, int flags) 693 { 694 struct reiserfs_transaction_handle th; 695 696 int err = 0; 697 698 if (sb_rdonly(inode->i_sb)) { 699 reiserfs_warning(inode->i_sb, "clm-6006", 700 "writing inode %lu on readonly FS", 701 inode->i_ino); 702 return; 703 } 704 reiserfs_write_lock(inode->i_sb); 705 706 /* 707 * this is really only used for atime updates, so they don't have 708 * to be included in O_SYNC or fsync 709 */ 710 err = journal_begin(&th, inode->i_sb, 1); 711 if (err) 712 goto out; 713 714 reiserfs_update_sd(&th, inode); 715 journal_end(&th); 716 717 out: 718 reiserfs_write_unlock(inode->i_sb); 719 } 720 721 static int reiserfs_show_options(struct seq_file *seq, struct dentry *root) 722 { 723 struct super_block *s = root->d_sb; 724 struct reiserfs_journal *journal = SB_JOURNAL(s); 725 long opts = REISERFS_SB(s)->s_mount_opt; 726 727 if (opts & (1 << REISERFS_LARGETAIL)) 728 seq_puts(seq, ",tails=on"); 729 else if (!(opts & (1 << REISERFS_SMALLTAIL))) 730 seq_puts(seq, ",notail"); 731 /* tails=small is default so we don't show it */ 732 733 if (!(opts & (1 << REISERFS_BARRIER_FLUSH))) 734 seq_puts(seq, ",barrier=none"); 735 /* barrier=flush is default so we don't show it */ 736 737 if (opts & (1 << REISERFS_ERROR_CONTINUE)) 738 seq_puts(seq, ",errors=continue"); 739 else if (opts & (1 << REISERFS_ERROR_PANIC)) 740 seq_puts(seq, ",errors=panic"); 741 /* errors=ro is default so we don't show it */ 742 743 if (opts & (1 << REISERFS_DATA_LOG)) 744 seq_puts(seq, ",data=journal"); 745 else if (opts & (1 << REISERFS_DATA_WRITEBACK)) 746 seq_puts(seq, ",data=writeback"); 747 /* data=ordered is default so we don't show it */ 748 749 if (opts & (1 << REISERFS_ATTRS)) 750 seq_puts(seq, ",attrs"); 751 752 if (opts & (1 << REISERFS_XATTRS_USER)) 753 seq_puts(seq, ",user_xattr"); 754 755 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT)) 756 seq_puts(seq, ",expose_privroot"); 757 758 if (opts & (1 << REISERFS_POSIXACL)) 759 seq_puts(seq, ",acl"); 760 761 if (REISERFS_SB(s)->s_jdev) 762 seq_show_option(seq, "jdev", REISERFS_SB(s)->s_jdev); 763 764 if (journal->j_max_commit_age != journal->j_default_max_commit_age) 765 seq_printf(seq, ",commit=%d", journal->j_max_commit_age); 766 767 #ifdef CONFIG_QUOTA 768 if (REISERFS_SB(s)->s_qf_names[USRQUOTA]) 769 seq_show_option(seq, "usrjquota", 770 REISERFS_SB(s)->s_qf_names[USRQUOTA]); 771 else if (opts & (1 << REISERFS_USRQUOTA)) 772 seq_puts(seq, ",usrquota"); 773 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA]) 774 seq_show_option(seq, "grpjquota", 775 REISERFS_SB(s)->s_qf_names[GRPQUOTA]); 776 else if (opts & (1 << REISERFS_GRPQUOTA)) 777 seq_puts(seq, ",grpquota"); 778 if (REISERFS_SB(s)->s_jquota_fmt) { 779 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD) 780 seq_puts(seq, ",jqfmt=vfsold"); 781 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0) 782 seq_puts(seq, ",jqfmt=vfsv0"); 783 } 784 #endif 785 786 /* Block allocator options */ 787 if (opts & (1 << REISERFS_NO_BORDER)) 788 seq_puts(seq, ",block-allocator=noborder"); 789 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION)) 790 seq_puts(seq, ",block-allocator=no_unhashed_relocation"); 791 if (opts & (1 << REISERFS_HASHED_RELOCATION)) 792 seq_puts(seq, ",block-allocator=hashed_relocation"); 793 if (opts & (1 << REISERFS_TEST4)) 794 seq_puts(seq, ",block-allocator=test4"); 795 show_alloc_options(seq, s); 796 return 0; 797 } 798 799 #ifdef CONFIG_QUOTA 800 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, 801 size_t, loff_t); 802 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, 803 loff_t); 804 805 static struct dquot **reiserfs_get_dquots(struct inode *inode) 806 { 807 return REISERFS_I(inode)->i_dquot; 808 } 809 #endif 810 811 static const struct super_operations reiserfs_sops = { 812 .alloc_inode = reiserfs_alloc_inode, 813 .free_inode = reiserfs_free_inode, 814 .write_inode = reiserfs_write_inode, 815 .dirty_inode = reiserfs_dirty_inode, 816 .evict_inode = reiserfs_evict_inode, 817 .put_super = reiserfs_put_super, 818 .sync_fs = reiserfs_sync_fs, 819 .freeze_fs = reiserfs_freeze, 820 .unfreeze_fs = reiserfs_unfreeze, 821 .statfs = reiserfs_statfs, 822 .remount_fs = reiserfs_remount, 823 .show_options = reiserfs_show_options, 824 #ifdef CONFIG_QUOTA 825 .quota_read = reiserfs_quota_read, 826 .quota_write = reiserfs_quota_write, 827 .get_dquots = reiserfs_get_dquots, 828 #endif 829 }; 830 831 #ifdef CONFIG_QUOTA 832 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") 833 834 static int reiserfs_write_dquot(struct dquot *); 835 static int reiserfs_acquire_dquot(struct dquot *); 836 static int reiserfs_release_dquot(struct dquot *); 837 static int reiserfs_mark_dquot_dirty(struct dquot *); 838 static int reiserfs_write_info(struct super_block *, int); 839 static int reiserfs_quota_on(struct super_block *, int, int, const struct path *); 840 841 static const struct dquot_operations reiserfs_quota_operations = { 842 .write_dquot = reiserfs_write_dquot, 843 .acquire_dquot = reiserfs_acquire_dquot, 844 .release_dquot = reiserfs_release_dquot, 845 .mark_dirty = reiserfs_mark_dquot_dirty, 846 .write_info = reiserfs_write_info, 847 .alloc_dquot = dquot_alloc, 848 .destroy_dquot = dquot_destroy, 849 .get_next_id = dquot_get_next_id, 850 }; 851 852 static const struct quotactl_ops reiserfs_qctl_operations = { 853 .quota_on = reiserfs_quota_on, 854 .quota_off = reiserfs_quota_off, 855 .quota_sync = dquot_quota_sync, 856 .get_state = dquot_get_state, 857 .set_info = dquot_set_dqinfo, 858 .get_dqblk = dquot_get_dqblk, 859 .set_dqblk = dquot_set_dqblk, 860 }; 861 #endif 862 863 static const struct export_operations reiserfs_export_ops = { 864 .encode_fh = reiserfs_encode_fh, 865 .fh_to_dentry = reiserfs_fh_to_dentry, 866 .fh_to_parent = reiserfs_fh_to_parent, 867 .get_parent = reiserfs_get_parent, 868 }; 869 870 /* 871 * this struct is used in reiserfs_getopt () for containing the value for 872 * those mount options that have values rather than being toggles. 873 */ 874 typedef struct { 875 char *value; 876 /* 877 * bitmask which is to set on mount_options bitmask 878 * when this value is found, 0 is no bits are to be changed. 879 */ 880 int setmask; 881 /* 882 * bitmask which is to clear on mount_options bitmask 883 * when this value is found, 0 is no bits are to be changed. 884 * This is applied BEFORE setmask 885 */ 886 int clrmask; 887 } arg_desc_t; 888 889 /* Set this bit in arg_required to allow empty arguments */ 890 #define REISERFS_OPT_ALLOWEMPTY 31 891 892 /* 893 * this struct is used in reiserfs_getopt() for describing the 894 * set of reiserfs mount options 895 */ 896 typedef struct { 897 char *option_name; 898 899 /* 0 if argument is not required, not 0 otherwise */ 900 int arg_required; 901 902 /* list of values accepted by an option */ 903 const arg_desc_t *values; 904 905 /* 906 * bitmask which is to set on mount_options bitmask 907 * when this value is found, 0 is no bits are to be changed. 908 */ 909 int setmask; 910 911 /* 912 * bitmask which is to clear on mount_options bitmask 913 * when this value is found, 0 is no bits are to be changed. 914 * This is applied BEFORE setmask 915 */ 916 int clrmask; 917 } opt_desc_t; 918 919 /* possible values for -o data= */ 920 static const arg_desc_t logging_mode[] = { 921 {"ordered", 1 << REISERFS_DATA_ORDERED, 922 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)}, 923 {"journal", 1 << REISERFS_DATA_LOG, 924 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)}, 925 {"writeback", 1 << REISERFS_DATA_WRITEBACK, 926 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)}, 927 {.value = NULL} 928 }; 929 930 /* possible values for -o barrier= */ 931 static const arg_desc_t barrier_mode[] = { 932 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH}, 933 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE}, 934 {.value = NULL} 935 }; 936 937 /* 938 * possible values for "-o block-allocator=" and bits which are to be set in 939 * s_mount_opt of reiserfs specific part of in-core super block 940 */ 941 static const arg_desc_t balloc[] = { 942 {"noborder", 1 << REISERFS_NO_BORDER, 0}, 943 {"border", 0, 1 << REISERFS_NO_BORDER}, 944 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0}, 945 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0}, 946 {"test4", 1 << REISERFS_TEST4, 0}, 947 {"notest4", 0, 1 << REISERFS_TEST4}, 948 {NULL, 0, 0} 949 }; 950 951 static const arg_desc_t tails[] = { 952 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL}, 953 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, 954 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL}, 955 {NULL, 0, 0} 956 }; 957 958 static const arg_desc_t error_actions[] = { 959 {"panic", 1 << REISERFS_ERROR_PANIC, 960 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, 961 {"ro-remount", 1 << REISERFS_ERROR_RO, 962 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, 963 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG 964 {"continue", 1 << REISERFS_ERROR_CONTINUE, 965 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, 966 #endif 967 {NULL, 0, 0}, 968 }; 969 970 /* 971 * proceed only one option from a list *cur - string containing of mount 972 * options 973 * opts - array of options which are accepted 974 * opt_arg - if option is found and requires an argument and if it is specifed 975 * in the input - pointer to the argument is stored here 976 * bit_flags - if option requires to set a certain bit - it is set here 977 * return -1 if unknown option is found, opt->arg_required otherwise 978 */ 979 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts, 980 char **opt_arg, unsigned long *bit_flags) 981 { 982 char *p; 983 /* 984 * foo=bar, 985 * ^ ^ ^ 986 * | | +-- option_end 987 * | +-- arg_start 988 * +-- option_start 989 */ 990 const opt_desc_t *opt; 991 const arg_desc_t *arg; 992 993 p = *cur; 994 995 /* assume argument cannot contain commas */ 996 *cur = strchr(p, ','); 997 if (*cur) { 998 *(*cur) = '\0'; 999 (*cur)++; 1000 } 1001 1002 if (!strncmp(p, "alloc=", 6)) { 1003 /* 1004 * Ugly special case, probably we should redo options 1005 * parser so that it can understand several arguments for 1006 * some options, also so that it can fill several bitfields 1007 * with option values. 1008 */ 1009 if (reiserfs_parse_alloc_options(s, p + 6)) { 1010 return -1; 1011 } else { 1012 return 0; 1013 } 1014 } 1015 1016 /* for every option in the list */ 1017 for (opt = opts; opt->option_name; opt++) { 1018 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) { 1019 if (bit_flags) { 1020 if (opt->clrmask == 1021 (1 << REISERFS_UNSUPPORTED_OPT)) 1022 reiserfs_warning(s, "super-6500", 1023 "%s not supported.\n", 1024 p); 1025 else 1026 *bit_flags &= ~opt->clrmask; 1027 if (opt->setmask == 1028 (1 << REISERFS_UNSUPPORTED_OPT)) 1029 reiserfs_warning(s, "super-6501", 1030 "%s not supported.\n", 1031 p); 1032 else 1033 *bit_flags |= opt->setmask; 1034 } 1035 break; 1036 } 1037 } 1038 if (!opt->option_name) { 1039 reiserfs_warning(s, "super-6502", 1040 "unknown mount option \"%s\"", p); 1041 return -1; 1042 } 1043 1044 p += strlen(opt->option_name); 1045 switch (*p) { 1046 case '=': 1047 if (!opt->arg_required) { 1048 reiserfs_warning(s, "super-6503", 1049 "the option \"%s\" does not " 1050 "require an argument\n", 1051 opt->option_name); 1052 return -1; 1053 } 1054 break; 1055 1056 case 0: 1057 if (opt->arg_required) { 1058 reiserfs_warning(s, "super-6504", 1059 "the option \"%s\" requires an " 1060 "argument\n", opt->option_name); 1061 return -1; 1062 } 1063 break; 1064 default: 1065 reiserfs_warning(s, "super-6505", 1066 "head of option \"%s\" is only correct\n", 1067 opt->option_name); 1068 return -1; 1069 } 1070 1071 /* 1072 * move to the argument, or to next option if argument is not 1073 * required 1074 */ 1075 p++; 1076 1077 if (opt->arg_required 1078 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY)) 1079 && !strlen(p)) { 1080 /* this catches "option=," if not allowed */ 1081 reiserfs_warning(s, "super-6506", 1082 "empty argument for \"%s\"\n", 1083 opt->option_name); 1084 return -1; 1085 } 1086 1087 if (!opt->values) { 1088 /* *=NULLopt_arg contains pointer to argument */ 1089 *opt_arg = p; 1090 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY); 1091 } 1092 1093 /* values possible for this option are listed in opt->values */ 1094 for (arg = opt->values; arg->value; arg++) { 1095 if (!strcmp(p, arg->value)) { 1096 if (bit_flags) { 1097 *bit_flags &= ~arg->clrmask; 1098 *bit_flags |= arg->setmask; 1099 } 1100 return opt->arg_required; 1101 } 1102 } 1103 1104 reiserfs_warning(s, "super-6506", 1105 "bad value \"%s\" for option \"%s\"\n", p, 1106 opt->option_name); 1107 return -1; 1108 } 1109 1110 /* returns 0 if something is wrong in option string, 1 - otherwise */ 1111 static int reiserfs_parse_options(struct super_block *s, 1112 1113 /* string given via mount's -o */ 1114 char *options, 1115 1116 /* 1117 * after the parsing phase, contains the 1118 * collection of bitflags defining what 1119 * mount options were selected. 1120 */ 1121 unsigned long *mount_options, 1122 1123 /* strtol-ed from NNN of resize=NNN */ 1124 unsigned long *blocks, 1125 char **jdev_name, 1126 unsigned int *commit_max_age, 1127 char **qf_names, 1128 unsigned int *qfmt) 1129 { 1130 int c; 1131 char *arg = NULL; 1132 char *pos; 1133 opt_desc_t opts[] = { 1134 /* 1135 * Compatibility stuff, so that -o notail for old 1136 * setups still work 1137 */ 1138 {"tails",.arg_required = 't',.values = tails}, 1139 {"notail",.clrmask = 1140 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, 1141 {"conv",.setmask = 1 << REISERFS_CONVERT}, 1142 {"attrs",.setmask = 1 << REISERFS_ATTRS}, 1143 {"noattrs",.clrmask = 1 << REISERFS_ATTRS}, 1144 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT}, 1145 #ifdef CONFIG_REISERFS_FS_XATTR 1146 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER}, 1147 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER}, 1148 #else 1149 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, 1150 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, 1151 #endif 1152 #ifdef CONFIG_REISERFS_FS_POSIX_ACL 1153 {"acl",.setmask = 1 << REISERFS_POSIXACL}, 1154 {"noacl",.clrmask = 1 << REISERFS_POSIXACL}, 1155 #else 1156 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, 1157 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, 1158 #endif 1159 {.option_name = "nolog"}, 1160 {"replayonly",.setmask = 1 << REPLAYONLY}, 1161 {"block-allocator",.arg_required = 'a',.values = balloc}, 1162 {"data",.arg_required = 'd',.values = logging_mode}, 1163 {"barrier",.arg_required = 'b',.values = barrier_mode}, 1164 {"resize",.arg_required = 'r',.values = NULL}, 1165 {"jdev",.arg_required = 'j',.values = NULL}, 1166 {"nolargeio",.arg_required = 'w',.values = NULL}, 1167 {"commit",.arg_required = 'c',.values = NULL}, 1168 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA}, 1169 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA}, 1170 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA}, 1171 {"errors",.arg_required = 'e',.values = error_actions}, 1172 {"usrjquota",.arg_required = 1173 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, 1174 {"grpjquota",.arg_required = 1175 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, 1176 {"jqfmt",.arg_required = 'f',.values = NULL}, 1177 {.option_name = NULL} 1178 }; 1179 1180 *blocks = 0; 1181 if (!options || !*options) 1182 /* 1183 * use default configuration: create tails, journaling on, no 1184 * conversion to newest format 1185 */ 1186 return 1; 1187 1188 for (pos = options; pos;) { 1189 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options); 1190 if (c == -1) 1191 /* wrong option is given */ 1192 return 0; 1193 1194 if (c == 'r') { 1195 char *p; 1196 1197 p = NULL; 1198 /* "resize=NNN" or "resize=auto" */ 1199 1200 if (!strcmp(arg, "auto")) { 1201 /* From JFS code, to auto-get the size. */ 1202 *blocks = sb_bdev_nr_blocks(s); 1203 } else { 1204 *blocks = simple_strtoul(arg, &p, 0); 1205 if (*p != '\0') { 1206 /* NNN does not look like a number */ 1207 reiserfs_warning(s, "super-6507", 1208 "bad value %s for " 1209 "-oresize\n", arg); 1210 return 0; 1211 } 1212 } 1213 } 1214 1215 if (c == 'c') { 1216 char *p = NULL; 1217 unsigned long val = simple_strtoul(arg, &p, 0); 1218 /* commit=NNN (time in seconds) */ 1219 if (*p != '\0' || val >= (unsigned int)-1) { 1220 reiserfs_warning(s, "super-6508", 1221 "bad value %s for -ocommit\n", 1222 arg); 1223 return 0; 1224 } 1225 *commit_max_age = (unsigned int)val; 1226 } 1227 1228 if (c == 'w') { 1229 reiserfs_warning(s, "super-6509", "nolargeio option " 1230 "is no longer supported"); 1231 return 0; 1232 } 1233 1234 if (c == 'j') { 1235 if (arg && *arg && jdev_name) { 1236 /* Hm, already assigned? */ 1237 if (*jdev_name) { 1238 reiserfs_warning(s, "super-6510", 1239 "journal device was " 1240 "already specified to " 1241 "be %s", *jdev_name); 1242 return 0; 1243 } 1244 *jdev_name = arg; 1245 } 1246 } 1247 #ifdef CONFIG_QUOTA 1248 if (c == 'u' || c == 'g') { 1249 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; 1250 1251 if (sb_any_quota_loaded(s) && 1252 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) { 1253 reiserfs_warning(s, "super-6511", 1254 "cannot change journaled " 1255 "quota options when quota " 1256 "turned on."); 1257 return 0; 1258 } 1259 if (qf_names[qtype] != 1260 REISERFS_SB(s)->s_qf_names[qtype]) 1261 kfree(qf_names[qtype]); 1262 qf_names[qtype] = NULL; 1263 if (*arg) { /* Some filename specified? */ 1264 if (REISERFS_SB(s)->s_qf_names[qtype] 1265 && strcmp(REISERFS_SB(s)->s_qf_names[qtype], 1266 arg)) { 1267 reiserfs_warning(s, "super-6512", 1268 "%s quota file " 1269 "already specified.", 1270 QTYPE2NAME(qtype)); 1271 return 0; 1272 } 1273 if (strchr(arg, '/')) { 1274 reiserfs_warning(s, "super-6513", 1275 "quotafile must be " 1276 "on filesystem root."); 1277 return 0; 1278 } 1279 qf_names[qtype] = kstrdup(arg, GFP_KERNEL); 1280 if (!qf_names[qtype]) { 1281 reiserfs_warning(s, "reiserfs-2502", 1282 "not enough memory " 1283 "for storing " 1284 "quotafile name."); 1285 return 0; 1286 } 1287 if (qtype == USRQUOTA) 1288 *mount_options |= 1 << REISERFS_USRQUOTA; 1289 else 1290 *mount_options |= 1 << REISERFS_GRPQUOTA; 1291 } else { 1292 if (qtype == USRQUOTA) 1293 *mount_options &= ~(1 << REISERFS_USRQUOTA); 1294 else 1295 *mount_options &= ~(1 << REISERFS_GRPQUOTA); 1296 } 1297 } 1298 if (c == 'f') { 1299 if (!strcmp(arg, "vfsold")) 1300 *qfmt = QFMT_VFS_OLD; 1301 else if (!strcmp(arg, "vfsv0")) 1302 *qfmt = QFMT_VFS_V0; 1303 else { 1304 reiserfs_warning(s, "super-6514", 1305 "unknown quota format " 1306 "specified."); 1307 return 0; 1308 } 1309 if (sb_any_quota_loaded(s) && 1310 *qfmt != REISERFS_SB(s)->s_jquota_fmt) { 1311 reiserfs_warning(s, "super-6515", 1312 "cannot change journaled " 1313 "quota options when quota " 1314 "turned on."); 1315 return 0; 1316 } 1317 } 1318 #else 1319 if (c == 'u' || c == 'g' || c == 'f') { 1320 reiserfs_warning(s, "reiserfs-2503", "journaled " 1321 "quota options not supported."); 1322 return 0; 1323 } 1324 #endif 1325 } 1326 1327 #ifdef CONFIG_QUOTA 1328 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt 1329 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) { 1330 reiserfs_warning(s, "super-6515", 1331 "journaled quota format not specified."); 1332 return 0; 1333 } 1334 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) && 1335 sb_has_quota_loaded(s, USRQUOTA)) || 1336 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) && 1337 sb_has_quota_loaded(s, GRPQUOTA))) { 1338 reiserfs_warning(s, "super-6516", "quota options must " 1339 "be present when quota is turned on."); 1340 return 0; 1341 } 1342 #endif 1343 1344 return 1; 1345 } 1346 1347 static void switch_data_mode(struct super_block *s, unsigned long mode) 1348 { 1349 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | 1350 (1 << REISERFS_DATA_ORDERED) | 1351 (1 << REISERFS_DATA_WRITEBACK)); 1352 REISERFS_SB(s)->s_mount_opt |= (1 << mode); 1353 } 1354 1355 static void handle_data_mode(struct super_block *s, unsigned long mount_options) 1356 { 1357 if (mount_options & (1 << REISERFS_DATA_LOG)) { 1358 if (!reiserfs_data_log(s)) { 1359 switch_data_mode(s, REISERFS_DATA_LOG); 1360 reiserfs_info(s, "switching to journaled data mode\n"); 1361 } 1362 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { 1363 if (!reiserfs_data_ordered(s)) { 1364 switch_data_mode(s, REISERFS_DATA_ORDERED); 1365 reiserfs_info(s, "switching to ordered data mode\n"); 1366 } 1367 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { 1368 if (!reiserfs_data_writeback(s)) { 1369 switch_data_mode(s, REISERFS_DATA_WRITEBACK); 1370 reiserfs_info(s, "switching to writeback data mode\n"); 1371 } 1372 } 1373 } 1374 1375 static void handle_barrier_mode(struct super_block *s, unsigned long bits) 1376 { 1377 int flush = (1 << REISERFS_BARRIER_FLUSH); 1378 int none = (1 << REISERFS_BARRIER_NONE); 1379 int all_barrier = flush | none; 1380 1381 if (bits & all_barrier) { 1382 REISERFS_SB(s)->s_mount_opt &= ~all_barrier; 1383 if (bits & flush) { 1384 REISERFS_SB(s)->s_mount_opt |= flush; 1385 printk("reiserfs: enabling write barrier flush mode\n"); 1386 } else if (bits & none) { 1387 REISERFS_SB(s)->s_mount_opt |= none; 1388 printk("reiserfs: write barriers turned off\n"); 1389 } 1390 } 1391 } 1392 1393 static void handle_attrs(struct super_block *s) 1394 { 1395 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s); 1396 1397 if (reiserfs_attrs(s)) { 1398 if (old_format_only(s)) { 1399 reiserfs_warning(s, "super-6517", "cannot support " 1400 "attributes on 3.5.x disk format"); 1401 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); 1402 return; 1403 } 1404 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) { 1405 reiserfs_warning(s, "super-6518", "cannot support " 1406 "attributes until flag is set in " 1407 "super-block"); 1408 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); 1409 } 1410 } 1411 } 1412 1413 #ifdef CONFIG_QUOTA 1414 static void handle_quota_files(struct super_block *s, char **qf_names, 1415 unsigned int *qfmt) 1416 { 1417 int i; 1418 1419 for (i = 0; i < REISERFS_MAXQUOTAS; i++) { 1420 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) 1421 kfree(REISERFS_SB(s)->s_qf_names[i]); 1422 REISERFS_SB(s)->s_qf_names[i] = qf_names[i]; 1423 } 1424 if (*qfmt) 1425 REISERFS_SB(s)->s_jquota_fmt = *qfmt; 1426 } 1427 #endif 1428 1429 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) 1430 { 1431 struct reiserfs_super_block *rs; 1432 struct reiserfs_transaction_handle th; 1433 unsigned long blocks; 1434 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; 1435 unsigned long safe_mask = 0; 1436 unsigned int commit_max_age = (unsigned int)-1; 1437 struct reiserfs_journal *journal = SB_JOURNAL(s); 1438 int err; 1439 char *qf_names[REISERFS_MAXQUOTAS]; 1440 unsigned int qfmt = 0; 1441 #ifdef CONFIG_QUOTA 1442 int i; 1443 #endif 1444 1445 sync_filesystem(s); 1446 reiserfs_write_lock(s); 1447 1448 #ifdef CONFIG_QUOTA 1449 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names)); 1450 #endif 1451 1452 rs = SB_DISK_SUPER_BLOCK(s); 1453 1454 if (!reiserfs_parse_options 1455 (s, arg, &mount_options, &blocks, NULL, &commit_max_age, 1456 qf_names, &qfmt)) { 1457 #ifdef CONFIG_QUOTA 1458 for (i = 0; i < REISERFS_MAXQUOTAS; i++) 1459 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) 1460 kfree(qf_names[i]); 1461 #endif 1462 err = -EINVAL; 1463 goto out_err_unlock; 1464 } 1465 #ifdef CONFIG_QUOTA 1466 handle_quota_files(s, qf_names, &qfmt); 1467 #endif 1468 1469 handle_attrs(s); 1470 1471 /* Add options that are safe here */ 1472 safe_mask |= 1 << REISERFS_SMALLTAIL; 1473 safe_mask |= 1 << REISERFS_LARGETAIL; 1474 safe_mask |= 1 << REISERFS_NO_BORDER; 1475 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; 1476 safe_mask |= 1 << REISERFS_HASHED_RELOCATION; 1477 safe_mask |= 1 << REISERFS_TEST4; 1478 safe_mask |= 1 << REISERFS_ATTRS; 1479 safe_mask |= 1 << REISERFS_XATTRS_USER; 1480 safe_mask |= 1 << REISERFS_POSIXACL; 1481 safe_mask |= 1 << REISERFS_BARRIER_FLUSH; 1482 safe_mask |= 1 << REISERFS_BARRIER_NONE; 1483 safe_mask |= 1 << REISERFS_ERROR_RO; 1484 safe_mask |= 1 << REISERFS_ERROR_CONTINUE; 1485 safe_mask |= 1 << REISERFS_ERROR_PANIC; 1486 safe_mask |= 1 << REISERFS_USRQUOTA; 1487 safe_mask |= 1 << REISERFS_GRPQUOTA; 1488 1489 /* 1490 * Update the bitmask, taking care to keep 1491 * the bits we're not allowed to change here 1492 */ 1493 REISERFS_SB(s)->s_mount_opt = 1494 (REISERFS_SB(s)-> 1495 s_mount_opt & ~safe_mask) | (mount_options & safe_mask); 1496 1497 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) { 1498 journal->j_max_commit_age = commit_max_age; 1499 journal->j_max_trans_age = commit_max_age; 1500 } else if (commit_max_age == 0) { 1501 /* 0 means restore defaults. */ 1502 journal->j_max_commit_age = journal->j_default_max_commit_age; 1503 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; 1504 } 1505 1506 if (blocks) { 1507 err = reiserfs_resize(s, blocks); 1508 if (err != 0) 1509 goto out_err_unlock; 1510 } 1511 1512 if (*mount_flags & SB_RDONLY) { 1513 reiserfs_write_unlock(s); 1514 reiserfs_xattr_init(s, *mount_flags); 1515 /* remount read-only */ 1516 if (sb_rdonly(s)) 1517 /* it is read-only already */ 1518 goto out_ok_unlocked; 1519 1520 err = dquot_suspend(s, -1); 1521 if (err < 0) 1522 goto out_err; 1523 1524 /* try to remount file system with read-only permissions */ 1525 if (sb_umount_state(rs) == REISERFS_VALID_FS 1526 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { 1527 goto out_ok_unlocked; 1528 } 1529 1530 reiserfs_write_lock(s); 1531 1532 err = journal_begin(&th, s, 10); 1533 if (err) 1534 goto out_err_unlock; 1535 1536 /* Mounting a rw partition read-only. */ 1537 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); 1538 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state); 1539 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); 1540 } else { 1541 /* remount read-write */ 1542 if (!sb_rdonly(s)) { 1543 reiserfs_write_unlock(s); 1544 reiserfs_xattr_init(s, *mount_flags); 1545 goto out_ok_unlocked; /* We are read-write already */ 1546 } 1547 1548 if (reiserfs_is_journal_aborted(journal)) { 1549 err = journal->j_errno; 1550 goto out_err_unlock; 1551 } 1552 1553 handle_data_mode(s, mount_options); 1554 handle_barrier_mode(s, mount_options); 1555 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); 1556 1557 /* now it is safe to call journal_begin */ 1558 s->s_flags &= ~SB_RDONLY; 1559 err = journal_begin(&th, s, 10); 1560 if (err) 1561 goto out_err_unlock; 1562 1563 /* Mount a partition which is read-only, read-write */ 1564 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); 1565 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); 1566 s->s_flags &= ~SB_RDONLY; 1567 set_sb_umount_state(rs, REISERFS_ERROR_FS); 1568 if (!old_format_only(s)) 1569 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); 1570 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ 1571 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); 1572 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS; 1573 } 1574 /* this will force a full flush of all journal lists */ 1575 SB_JOURNAL(s)->j_must_wait = 1; 1576 err = journal_end(&th); 1577 if (err) 1578 goto out_err_unlock; 1579 1580 reiserfs_write_unlock(s); 1581 if (!(*mount_flags & SB_RDONLY)) { 1582 dquot_resume(s, -1); 1583 reiserfs_write_lock(s); 1584 finish_unfinished(s); 1585 reiserfs_write_unlock(s); 1586 reiserfs_xattr_init(s, *mount_flags); 1587 } 1588 1589 out_ok_unlocked: 1590 return 0; 1591 1592 out_err_unlock: 1593 reiserfs_write_unlock(s); 1594 out_err: 1595 return err; 1596 } 1597 1598 static int read_super_block(struct super_block *s, int offset) 1599 { 1600 struct buffer_head *bh; 1601 struct reiserfs_super_block *rs; 1602 int fs_blocksize; 1603 1604 bh = sb_bread(s, offset / s->s_blocksize); 1605 if (!bh) { 1606 reiserfs_warning(s, "sh-2006", 1607 "bread failed (dev %s, block %lu, size %lu)", 1608 s->s_id, offset / s->s_blocksize, 1609 s->s_blocksize); 1610 return 1; 1611 } 1612 1613 rs = (struct reiserfs_super_block *)bh->b_data; 1614 if (!is_any_reiserfs_magic_string(rs)) { 1615 brelse(bh); 1616 return 1; 1617 } 1618 /* 1619 * ok, reiserfs signature (old or new) found in at the given offset 1620 */ 1621 fs_blocksize = sb_blocksize(rs); 1622 brelse(bh); 1623 sb_set_blocksize(s, fs_blocksize); 1624 1625 bh = sb_bread(s, offset / s->s_blocksize); 1626 if (!bh) { 1627 reiserfs_warning(s, "sh-2007", 1628 "bread failed (dev %s, block %lu, size %lu)", 1629 s->s_id, offset / s->s_blocksize, 1630 s->s_blocksize); 1631 return 1; 1632 } 1633 1634 rs = (struct reiserfs_super_block *)bh->b_data; 1635 if (sb_blocksize(rs) != s->s_blocksize) { 1636 reiserfs_warning(s, "sh-2011", "can't find a reiserfs " 1637 "filesystem on (dev %s, block %llu, size %lu)", 1638 s->s_id, 1639 (unsigned long long)bh->b_blocknr, 1640 s->s_blocksize); 1641 brelse(bh); 1642 return 1; 1643 } 1644 1645 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) { 1646 brelse(bh); 1647 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck " 1648 "--rebuild-tree run detected. Please run\n" 1649 "reiserfsck --rebuild-tree and wait for a " 1650 "completion. If that fails\n" 1651 "get newer reiserfsprogs package"); 1652 return 1; 1653 } 1654 1655 reiserfs_warning(NULL, "", "reiserfs filesystem is deprecated and " 1656 "scheduled to be removed from the kernel in 2025"); 1657 SB_BUFFER_WITH_SB(s) = bh; 1658 SB_DISK_SUPER_BLOCK(s) = rs; 1659 1660 /* 1661 * magic is of non-standard journal filesystem, look at s_version to 1662 * find which format is in use 1663 */ 1664 if (is_reiserfs_jr(rs)) { 1665 if (sb_version(rs) == REISERFS_VERSION_2) 1666 reiserfs_info(s, "found reiserfs format \"3.6\"" 1667 " with non-standard journal\n"); 1668 else if (sb_version(rs) == REISERFS_VERSION_1) 1669 reiserfs_info(s, "found reiserfs format \"3.5\"" 1670 " with non-standard journal\n"); 1671 else { 1672 reiserfs_warning(s, "sh-2012", "found unknown " 1673 "format \"%u\" of reiserfs with " 1674 "non-standard magic", sb_version(rs)); 1675 return 1; 1676 } 1677 } else 1678 /* 1679 * s_version of standard format may contain incorrect 1680 * information, so we just look at the magic string 1681 */ 1682 reiserfs_info(s, 1683 "found reiserfs format \"%s\" with standard journal\n", 1684 is_reiserfs_3_5(rs) ? "3.5" : "3.6"); 1685 1686 s->s_op = &reiserfs_sops; 1687 s->s_export_op = &reiserfs_export_ops; 1688 #ifdef CONFIG_QUOTA 1689 s->s_qcop = &reiserfs_qctl_operations; 1690 s->dq_op = &reiserfs_quota_operations; 1691 s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 1692 #endif 1693 1694 /* 1695 * new format is limited by the 32 bit wide i_blocks field, want to 1696 * be one full block below that. 1697 */ 1698 s->s_maxbytes = (512LL << 32) - s->s_blocksize; 1699 return 0; 1700 } 1701 1702 /* after journal replay, reread all bitmap and super blocks */ 1703 static int reread_meta_blocks(struct super_block *s) 1704 { 1705 if (bh_read(SB_BUFFER_WITH_SB(s), 0) < 0) { 1706 reiserfs_warning(s, "reiserfs-2504", "error reading the super"); 1707 return 1; 1708 } 1709 1710 return 0; 1711 } 1712 1713 /* hash detection stuff */ 1714 1715 /* 1716 * if root directory is empty - we set default - Yura's - hash and 1717 * warn about it 1718 * FIXME: we look for only one name in a directory. If tea and yura 1719 * both have the same value - we ask user to send report to the 1720 * mailing list 1721 */ 1722 static __u32 find_hash_out(struct super_block *s) 1723 { 1724 int retval; 1725 struct inode *inode; 1726 struct cpu_key key; 1727 INITIALIZE_PATH(path); 1728 struct reiserfs_dir_entry de; 1729 struct reiserfs_de_head *deh; 1730 __u32 hash = DEFAULT_HASH; 1731 __u32 deh_hashval, teahash, r5hash, yurahash; 1732 1733 inode = d_inode(s->s_root); 1734 1735 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3); 1736 retval = search_by_entry_key(s, &key, &path, &de); 1737 if (retval == IO_ERROR) { 1738 pathrelse(&path); 1739 return UNSET_HASH; 1740 } 1741 if (retval == NAME_NOT_FOUND) 1742 de.de_entry_num--; 1743 1744 set_de_name_and_namelen(&de); 1745 deh = de.de_deh + de.de_entry_num; 1746 1747 if (deh_offset(deh) == DOT_DOT_OFFSET) { 1748 /* allow override in this case */ 1749 if (reiserfs_rupasov_hash(s)) 1750 hash = YURA_HASH; 1751 reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n"); 1752 goto out; 1753 } 1754 1755 deh_hashval = GET_HASH_VALUE(deh_offset(deh)); 1756 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen)); 1757 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen)); 1758 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen)); 1759 1760 if ((teahash == r5hash && deh_hashval == r5hash) || 1761 (teahash == yurahash && deh_hashval == yurahash) || 1762 (r5hash == yurahash && deh_hashval == yurahash)) { 1763 reiserfs_warning(s, "reiserfs-2506", 1764 "Unable to automatically detect hash " 1765 "function. Please mount with -o " 1766 "hash={tea,rupasov,r5}"); 1767 hash = UNSET_HASH; 1768 goto out; 1769 } 1770 1771 if (deh_hashval == yurahash) 1772 hash = YURA_HASH; 1773 else if (deh_hashval == teahash) 1774 hash = TEA_HASH; 1775 else if (deh_hashval == r5hash) 1776 hash = R5_HASH; 1777 else { 1778 reiserfs_warning(s, "reiserfs-2506", 1779 "Unrecognised hash function"); 1780 hash = UNSET_HASH; 1781 } 1782 out: 1783 pathrelse(&path); 1784 return hash; 1785 } 1786 1787 /* finds out which hash names are sorted with */ 1788 static int what_hash(struct super_block *s) 1789 { 1790 __u32 code; 1791 1792 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); 1793 1794 /* 1795 * reiserfs_hash_detect() == true if any of the hash mount options 1796 * were used. We must check them to make sure the user isn't 1797 * using a bad hash value 1798 */ 1799 if (code == UNSET_HASH || reiserfs_hash_detect(s)) 1800 code = find_hash_out(s); 1801 1802 if (code != UNSET_HASH && reiserfs_hash_detect(s)) { 1803 /* 1804 * detection has found the hash, and we must check against the 1805 * mount options 1806 */ 1807 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { 1808 reiserfs_warning(s, "reiserfs-2507", 1809 "Error, %s hash detected, " 1810 "unable to force rupasov hash", 1811 reiserfs_hashname(code)); 1812 code = UNSET_HASH; 1813 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { 1814 reiserfs_warning(s, "reiserfs-2508", 1815 "Error, %s hash detected, " 1816 "unable to force tea hash", 1817 reiserfs_hashname(code)); 1818 code = UNSET_HASH; 1819 } else if (reiserfs_r5_hash(s) && code != R5_HASH) { 1820 reiserfs_warning(s, "reiserfs-2509", 1821 "Error, %s hash detected, " 1822 "unable to force r5 hash", 1823 reiserfs_hashname(code)); 1824 code = UNSET_HASH; 1825 } 1826 } else { 1827 /* 1828 * find_hash_out was not called or 1829 * could not determine the hash 1830 */ 1831 if (reiserfs_rupasov_hash(s)) { 1832 code = YURA_HASH; 1833 } else if (reiserfs_tea_hash(s)) { 1834 code = TEA_HASH; 1835 } else if (reiserfs_r5_hash(s)) { 1836 code = R5_HASH; 1837 } 1838 } 1839 1840 /* 1841 * if we are mounted RW, and we have a new valid hash code, update 1842 * the super 1843 */ 1844 if (code != UNSET_HASH && 1845 !sb_rdonly(s) && 1846 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { 1847 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); 1848 } 1849 return code; 1850 } 1851 1852 /* return pointer to appropriate function */ 1853 static hashf_t hash_function(struct super_block *s) 1854 { 1855 switch (what_hash(s)) { 1856 case TEA_HASH: 1857 reiserfs_info(s, "Using tea hash to sort names\n"); 1858 return keyed_hash; 1859 case YURA_HASH: 1860 reiserfs_info(s, "Using rupasov hash to sort names\n"); 1861 return yura_hash; 1862 case R5_HASH: 1863 reiserfs_info(s, "Using r5 hash to sort names\n"); 1864 return r5_hash; 1865 } 1866 return NULL; 1867 } 1868 1869 /* this is used to set up correct value for old partitions */ 1870 static int function2code(hashf_t func) 1871 { 1872 if (func == keyed_hash) 1873 return TEA_HASH; 1874 if (func == yura_hash) 1875 return YURA_HASH; 1876 if (func == r5_hash) 1877 return R5_HASH; 1878 1879 BUG(); /* should never happen */ 1880 1881 return 0; 1882 } 1883 1884 #define SWARN(silent, s, id, ...) \ 1885 if (!(silent)) \ 1886 reiserfs_warning(s, id, __VA_ARGS__) 1887 1888 static int reiserfs_fill_super(struct super_block *s, void *data, int silent) 1889 { 1890 struct inode *root_inode; 1891 struct reiserfs_transaction_handle th; 1892 int old_format = 0; 1893 unsigned long blocks; 1894 unsigned int commit_max_age = 0; 1895 int jinit_done = 0; 1896 struct reiserfs_iget_args args; 1897 struct reiserfs_super_block *rs; 1898 char *jdev_name; 1899 struct reiserfs_sb_info *sbi; 1900 int errval = -EINVAL; 1901 char *qf_names[REISERFS_MAXQUOTAS] = {}; 1902 unsigned int qfmt = 0; 1903 1904 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); 1905 if (!sbi) 1906 return -ENOMEM; 1907 s->s_fs_info = sbi; 1908 /* Set default values for options: non-aggressive tails, RO on errors */ 1909 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL); 1910 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO); 1911 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH); 1912 /* no preallocation minimum, be smart in reiserfs_file_write instead */ 1913 sbi->s_alloc_options.preallocmin = 0; 1914 /* Preallocate by 16 blocks (17-1) at once */ 1915 sbi->s_alloc_options.preallocsize = 17; 1916 /* setup default block allocator options */ 1917 reiserfs_init_alloc_options(s); 1918 1919 spin_lock_init(&sbi->old_work_lock); 1920 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits); 1921 mutex_init(&sbi->lock); 1922 sbi->lock_depth = -1; 1923 1924 sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0, 1925 s->s_id); 1926 if (!sbi->commit_wq) { 1927 SWARN(silent, s, "", "Cannot allocate commit workqueue"); 1928 errval = -ENOMEM; 1929 goto error_unlocked; 1930 } 1931 1932 jdev_name = NULL; 1933 if (reiserfs_parse_options 1934 (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name, 1935 &commit_max_age, qf_names, &qfmt) == 0) { 1936 goto error_unlocked; 1937 } 1938 if (jdev_name && jdev_name[0]) { 1939 sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL); 1940 if (!sbi->s_jdev) { 1941 SWARN(silent, s, "", "Cannot allocate memory for " 1942 "journal device name"); 1943 goto error_unlocked; 1944 } 1945 } 1946 #ifdef CONFIG_QUOTA 1947 handle_quota_files(s, qf_names, &qfmt); 1948 #endif 1949 1950 if (blocks) { 1951 SWARN(silent, s, "jmacd-7", "resize option for remount only"); 1952 goto error_unlocked; 1953 } 1954 1955 /* 1956 * try old format (undistributed bitmap, super block in 8-th 1k 1957 * block of a device) 1958 */ 1959 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) 1960 old_format = 1; 1961 1962 /* 1963 * try new format (64-th 1k block), which can contain reiserfs 1964 * super block 1965 */ 1966 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) { 1967 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s", 1968 s->s_id); 1969 goto error_unlocked; 1970 } 1971 1972 s->s_time_min = 0; 1973 s->s_time_max = U32_MAX; 1974 1975 rs = SB_DISK_SUPER_BLOCK(s); 1976 /* 1977 * Let's do basic sanity check to verify that underlying device is not 1978 * smaller than the filesystem. If the check fails then abort and 1979 * scream, because bad stuff will happen otherwise. 1980 */ 1981 if (bdev_nr_bytes(s->s_bdev) < sb_block_count(rs) * sb_blocksize(rs)) { 1982 SWARN(silent, s, "", "Filesystem cannot be " 1983 "mounted because it is bigger than the device"); 1984 SWARN(silent, s, "", "You may need to run fsck " 1985 "or increase size of your LVM partition"); 1986 SWARN(silent, s, "", "Or may be you forgot to " 1987 "reboot after fdisk when it told you to"); 1988 goto error_unlocked; 1989 } 1990 1991 sbi->s_mount_state = SB_REISERFS_STATE(s); 1992 sbi->s_mount_state = REISERFS_VALID_FS; 1993 1994 if ((errval = reiserfs_init_bitmap_cache(s))) { 1995 SWARN(silent, s, "jmacd-8", "unable to read bitmap"); 1996 goto error_unlocked; 1997 } 1998 1999 errval = -EINVAL; 2000 #ifdef CONFIG_REISERFS_CHECK 2001 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON"); 2002 SWARN(silent, s, "", "- it is slow mode for debugging."); 2003 #endif 2004 2005 /* make data=ordered the default */ 2006 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && 2007 !reiserfs_data_writeback(s)) { 2008 sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); 2009 } 2010 2011 if (reiserfs_data_log(s)) { 2012 reiserfs_info(s, "using journaled data mode\n"); 2013 } else if (reiserfs_data_ordered(s)) { 2014 reiserfs_info(s, "using ordered data mode\n"); 2015 } else { 2016 reiserfs_info(s, "using writeback data mode\n"); 2017 } 2018 if (reiserfs_barrier_flush(s)) { 2019 printk("reiserfs: using flush barriers\n"); 2020 } 2021 2022 if (journal_init(s, jdev_name, old_format, commit_max_age)) { 2023 SWARN(silent, s, "sh-2022", 2024 "unable to initialize journal space"); 2025 goto error_unlocked; 2026 } else { 2027 /* 2028 * once this is set, journal_release must be called 2029 * if we error out of the mount 2030 */ 2031 jinit_done = 1; 2032 } 2033 2034 if (reread_meta_blocks(s)) { 2035 SWARN(silent, s, "jmacd-9", 2036 "unable to reread meta blocks after journal init"); 2037 goto error_unlocked; 2038 } 2039 2040 if (replay_only(s)) 2041 goto error_unlocked; 2042 2043 s->s_xattr = reiserfs_xattr_handlers; 2044 2045 if (bdev_read_only(s->s_bdev) && !sb_rdonly(s)) { 2046 SWARN(silent, s, "clm-7000", 2047 "Detected readonly device, marking FS readonly"); 2048 s->s_flags |= SB_RDONLY; 2049 } 2050 args.objectid = REISERFS_ROOT_OBJECTID; 2051 args.dirid = REISERFS_ROOT_PARENT_OBJECTID; 2052 root_inode = 2053 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, 2054 reiserfs_init_locked_inode, (void *)&args); 2055 if (!root_inode) { 2056 SWARN(silent, s, "jmacd-10", "get root inode failed"); 2057 goto error_unlocked; 2058 } 2059 2060 /* 2061 * This path assumed to be called with the BKL in the old times. 2062 * Now we have inherited the big reiserfs lock from it and many 2063 * reiserfs helpers called in the mount path and elsewhere require 2064 * this lock to be held even if it's not always necessary. Let's be 2065 * conservative and hold it early. The window can be reduced after 2066 * careful review of the code. 2067 */ 2068 reiserfs_write_lock(s); 2069 2070 if (root_inode->i_state & I_NEW) { 2071 reiserfs_read_locked_inode(root_inode, &args); 2072 unlock_new_inode(root_inode); 2073 } 2074 2075 if (!S_ISDIR(root_inode->i_mode) || !inode_get_bytes(root_inode) || 2076 !root_inode->i_size) { 2077 SWARN(silent, s, "", "corrupt root inode, run fsck"); 2078 iput(root_inode); 2079 errval = -EUCLEAN; 2080 goto error; 2081 } 2082 2083 s->s_root = d_make_root(root_inode); 2084 if (!s->s_root) 2085 goto error; 2086 /* define and initialize hash function */ 2087 sbi->s_hash_function = hash_function(s); 2088 if (sbi->s_hash_function == NULL) { 2089 dput(s->s_root); 2090 s->s_root = NULL; 2091 goto error; 2092 } 2093 2094 if (is_reiserfs_3_5(rs) 2095 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) 2096 set_bit(REISERFS_3_5, &sbi->s_properties); 2097 else if (old_format) 2098 set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties); 2099 else 2100 set_bit(REISERFS_3_6, &sbi->s_properties); 2101 2102 if (!sb_rdonly(s)) { 2103 2104 errval = journal_begin(&th, s, 1); 2105 if (errval) { 2106 dput(s->s_root); 2107 s->s_root = NULL; 2108 goto error; 2109 } 2110 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); 2111 2112 set_sb_umount_state(rs, REISERFS_ERROR_FS); 2113 set_sb_fs_state(rs, 0); 2114 2115 /* 2116 * Clear out s_bmap_nr if it would wrap. We can handle this 2117 * case, but older revisions can't. This will cause the 2118 * file system to fail mount on those older implementations, 2119 * avoiding corruption. -jeffm 2120 */ 2121 if (bmap_would_wrap(reiserfs_bmap_count(s)) && 2122 sb_bmap_nr(rs) != 0) { 2123 reiserfs_warning(s, "super-2030", "This file system " 2124 "claims to use %u bitmap blocks in " 2125 "its super block, but requires %u. " 2126 "Clearing to zero.", sb_bmap_nr(rs), 2127 reiserfs_bmap_count(s)); 2128 2129 set_sb_bmap_nr(rs, 0); 2130 } 2131 2132 if (old_format_only(s)) { 2133 /* 2134 * filesystem of format 3.5 either with standard 2135 * or non-standard journal 2136 */ 2137 if (convert_reiserfs(s)) { 2138 /* and -o conv is given */ 2139 if (!silent) 2140 reiserfs_info(s, 2141 "converting 3.5 filesystem to the 3.6 format"); 2142 2143 if (is_reiserfs_3_5(rs)) 2144 /* 2145 * put magic string of 3.6 format. 2146 * 2.2 will not be able to 2147 * mount this filesystem anymore 2148 */ 2149 memcpy(rs->s_v1.s_magic, 2150 reiserfs_3_6_magic_string, 2151 sizeof 2152 (reiserfs_3_6_magic_string)); 2153 2154 set_sb_version(rs, REISERFS_VERSION_2); 2155 reiserfs_convert_objectid_map_v1(s); 2156 set_bit(REISERFS_3_6, &sbi->s_properties); 2157 clear_bit(REISERFS_3_5, &sbi->s_properties); 2158 } else if (!silent) { 2159 reiserfs_info(s, "using 3.5.x disk format\n"); 2160 } 2161 } else 2162 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); 2163 2164 2165 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); 2166 errval = journal_end(&th); 2167 if (errval) { 2168 dput(s->s_root); 2169 s->s_root = NULL; 2170 goto error; 2171 } 2172 2173 reiserfs_write_unlock(s); 2174 if ((errval = reiserfs_lookup_privroot(s)) || 2175 (errval = reiserfs_xattr_init(s, s->s_flags))) { 2176 dput(s->s_root); 2177 s->s_root = NULL; 2178 goto error_unlocked; 2179 } 2180 reiserfs_write_lock(s); 2181 2182 /* 2183 * look for files which were to be removed in previous session 2184 */ 2185 finish_unfinished(s); 2186 } else { 2187 if (old_format_only(s) && !silent) { 2188 reiserfs_info(s, "using 3.5.x disk format\n"); 2189 } 2190 2191 reiserfs_write_unlock(s); 2192 if ((errval = reiserfs_lookup_privroot(s)) || 2193 (errval = reiserfs_xattr_init(s, s->s_flags))) { 2194 dput(s->s_root); 2195 s->s_root = NULL; 2196 goto error_unlocked; 2197 } 2198 reiserfs_write_lock(s); 2199 } 2200 /* 2201 * mark hash in super block: it could be unset. overwrite should be ok 2202 */ 2203 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); 2204 2205 handle_attrs(s); 2206 2207 reiserfs_proc_info_init(s); 2208 2209 init_waitqueue_head(&(sbi->s_wait)); 2210 spin_lock_init(&sbi->bitmap_lock); 2211 2212 reiserfs_write_unlock(s); 2213 2214 return (0); 2215 2216 error: 2217 reiserfs_write_unlock(s); 2218 2219 error_unlocked: 2220 /* kill the commit thread, free journal ram */ 2221 if (jinit_done) { 2222 reiserfs_write_lock(s); 2223 journal_release_error(NULL, s); 2224 reiserfs_write_unlock(s); 2225 } 2226 2227 if (sbi->commit_wq) 2228 destroy_workqueue(sbi->commit_wq); 2229 2230 reiserfs_cancel_old_flush(s); 2231 2232 reiserfs_free_bitmap_cache(s); 2233 if (SB_BUFFER_WITH_SB(s)) 2234 brelse(SB_BUFFER_WITH_SB(s)); 2235 #ifdef CONFIG_QUOTA 2236 { 2237 int j; 2238 for (j = 0; j < REISERFS_MAXQUOTAS; j++) 2239 kfree(qf_names[j]); 2240 } 2241 #endif 2242 kfree(sbi->s_jdev); 2243 kfree(sbi); 2244 2245 s->s_fs_info = NULL; 2246 return errval; 2247 } 2248 2249 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) 2250 { 2251 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb); 2252 2253 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize)); 2254 buf->f_bfree = sb_free_blocks(rs); 2255 buf->f_bavail = buf->f_bfree; 2256 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; 2257 buf->f_bsize = dentry->d_sb->s_blocksize; 2258 /* changed to accommodate gcc folks. */ 2259 buf->f_type = REISERFS_SUPER_MAGIC; 2260 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2); 2261 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2, 2262 sizeof(rs->s_uuid)/2); 2263 2264 return 0; 2265 } 2266 2267 #ifdef CONFIG_QUOTA 2268 static int reiserfs_write_dquot(struct dquot *dquot) 2269 { 2270 struct reiserfs_transaction_handle th; 2271 int ret, err; 2272 int depth; 2273 2274 reiserfs_write_lock(dquot->dq_sb); 2275 ret = 2276 journal_begin(&th, dquot->dq_sb, 2277 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 2278 if (ret) 2279 goto out; 2280 depth = reiserfs_write_unlock_nested(dquot->dq_sb); 2281 ret = dquot_commit(dquot); 2282 reiserfs_write_lock_nested(dquot->dq_sb, depth); 2283 err = journal_end(&th); 2284 if (!ret && err) 2285 ret = err; 2286 out: 2287 reiserfs_write_unlock(dquot->dq_sb); 2288 return ret; 2289 } 2290 2291 static int reiserfs_acquire_dquot(struct dquot *dquot) 2292 { 2293 struct reiserfs_transaction_handle th; 2294 int ret, err; 2295 int depth; 2296 2297 reiserfs_write_lock(dquot->dq_sb); 2298 ret = 2299 journal_begin(&th, dquot->dq_sb, 2300 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 2301 if (ret) 2302 goto out; 2303 depth = reiserfs_write_unlock_nested(dquot->dq_sb); 2304 ret = dquot_acquire(dquot); 2305 reiserfs_write_lock_nested(dquot->dq_sb, depth); 2306 err = journal_end(&th); 2307 if (!ret && err) 2308 ret = err; 2309 out: 2310 reiserfs_write_unlock(dquot->dq_sb); 2311 return ret; 2312 } 2313 2314 static int reiserfs_release_dquot(struct dquot *dquot) 2315 { 2316 struct reiserfs_transaction_handle th; 2317 int ret, err; 2318 2319 reiserfs_write_lock(dquot->dq_sb); 2320 ret = 2321 journal_begin(&th, dquot->dq_sb, 2322 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 2323 reiserfs_write_unlock(dquot->dq_sb); 2324 if (ret) { 2325 /* Release dquot anyway to avoid endless cycle in dqput() */ 2326 dquot_release(dquot); 2327 goto out; 2328 } 2329 ret = dquot_release(dquot); 2330 reiserfs_write_lock(dquot->dq_sb); 2331 err = journal_end(&th); 2332 if (!ret && err) 2333 ret = err; 2334 reiserfs_write_unlock(dquot->dq_sb); 2335 out: 2336 return ret; 2337 } 2338 2339 static int reiserfs_mark_dquot_dirty(struct dquot *dquot) 2340 { 2341 /* Are we journaling quotas? */ 2342 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 2343 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 2344 dquot_mark_dquot_dirty(dquot); 2345 return reiserfs_write_dquot(dquot); 2346 } else 2347 return dquot_mark_dquot_dirty(dquot); 2348 } 2349 2350 static int reiserfs_write_info(struct super_block *sb, int type) 2351 { 2352 struct reiserfs_transaction_handle th; 2353 int ret, err; 2354 int depth; 2355 2356 /* Data block + inode block */ 2357 reiserfs_write_lock(sb); 2358 ret = journal_begin(&th, sb, 2); 2359 if (ret) 2360 goto out; 2361 depth = reiserfs_write_unlock_nested(sb); 2362 ret = dquot_commit_info(sb, type); 2363 reiserfs_write_lock_nested(sb, depth); 2364 err = journal_end(&th); 2365 if (!ret && err) 2366 ret = err; 2367 out: 2368 reiserfs_write_unlock(sb); 2369 return ret; 2370 } 2371 2372 /* 2373 * Turn on quotas during mount time - we need to find the quota file and such... 2374 */ 2375 static int reiserfs_quota_on_mount(struct super_block *sb, int type) 2376 { 2377 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type], 2378 REISERFS_SB(sb)->s_jquota_fmt, type); 2379 } 2380 2381 /* 2382 * Standard function to be called on quota_on 2383 */ 2384 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, 2385 const struct path *path) 2386 { 2387 int err; 2388 struct inode *inode; 2389 struct reiserfs_transaction_handle th; 2390 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA; 2391 2392 reiserfs_write_lock(sb); 2393 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) { 2394 err = -EINVAL; 2395 goto out; 2396 } 2397 2398 /* Quotafile not on the same filesystem? */ 2399 if (path->dentry->d_sb != sb) { 2400 err = -EXDEV; 2401 goto out; 2402 } 2403 inode = d_inode(path->dentry); 2404 /* 2405 * We must not pack tails for quota files on reiserfs for quota 2406 * IO to work 2407 */ 2408 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) { 2409 err = reiserfs_unpack(inode); 2410 if (err) { 2411 reiserfs_warning(sb, "super-6520", 2412 "Unpacking tail of quota file failed" 2413 " (%d). Cannot turn on quotas.", err); 2414 err = -EINVAL; 2415 goto out; 2416 } 2417 mark_inode_dirty(inode); 2418 } 2419 /* Journaling quota? */ 2420 if (REISERFS_SB(sb)->s_qf_names[type]) { 2421 /* Quotafile not of fs root? */ 2422 if (path->dentry->d_parent != sb->s_root) 2423 reiserfs_warning(sb, "super-6521", 2424 "Quota file not on filesystem root. " 2425 "Journalled quota will not work."); 2426 } 2427 2428 /* 2429 * When we journal data on quota file, we have to flush journal to see 2430 * all updates to the file when we bypass pagecache... 2431 */ 2432 if (reiserfs_file_data_log(inode)) { 2433 /* Just start temporary transaction and finish it */ 2434 err = journal_begin(&th, sb, 1); 2435 if (err) 2436 goto out; 2437 err = journal_end_sync(&th); 2438 if (err) 2439 goto out; 2440 } 2441 reiserfs_write_unlock(sb); 2442 err = dquot_quota_on(sb, type, format_id, path); 2443 if (!err) { 2444 inode_lock(inode); 2445 REISERFS_I(inode)->i_attrs |= REISERFS_IMMUTABLE_FL | 2446 REISERFS_NOATIME_FL; 2447 inode_set_flags(inode, S_IMMUTABLE | S_NOATIME, 2448 S_IMMUTABLE | S_NOATIME); 2449 inode_unlock(inode); 2450 mark_inode_dirty(inode); 2451 } 2452 return err; 2453 out: 2454 reiserfs_write_unlock(sb); 2455 return err; 2456 } 2457 2458 static int reiserfs_quota_off(struct super_block *sb, int type) 2459 { 2460 int err; 2461 struct inode *inode = sb_dqopt(sb)->files[type]; 2462 2463 if (!inode || !igrab(inode)) 2464 goto out; 2465 2466 err = dquot_quota_off(sb, type); 2467 if (err) 2468 goto out_put; 2469 2470 inode_lock(inode); 2471 REISERFS_I(inode)->i_attrs &= ~(REISERFS_IMMUTABLE_FL | 2472 REISERFS_NOATIME_FL); 2473 inode_set_flags(inode, 0, S_IMMUTABLE | S_NOATIME); 2474 inode_unlock(inode); 2475 mark_inode_dirty(inode); 2476 out_put: 2477 iput(inode); 2478 return err; 2479 out: 2480 return dquot_quota_off(sb, type); 2481 } 2482 2483 /* 2484 * Read data from quotafile - avoid pagecache and such because we cannot afford 2485 * acquiring the locks... As quota files are never truncated and quota code 2486 * itself serializes the operations (and no one else should touch the files) 2487 * we don't have to be afraid of races 2488 */ 2489 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, 2490 size_t len, loff_t off) 2491 { 2492 struct inode *inode = sb_dqopt(sb)->files[type]; 2493 unsigned long blk = off >> sb->s_blocksize_bits; 2494 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; 2495 size_t toread; 2496 struct buffer_head tmp_bh, *bh; 2497 loff_t i_size = i_size_read(inode); 2498 2499 if (off > i_size) 2500 return 0; 2501 if (off + len > i_size) 2502 len = i_size - off; 2503 toread = len; 2504 while (toread > 0) { 2505 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread); 2506 tmp_bh.b_state = 0; 2507 /* 2508 * Quota files are without tails so we can safely 2509 * use this function 2510 */ 2511 reiserfs_write_lock(sb); 2512 err = reiserfs_get_block(inode, blk, &tmp_bh, 0); 2513 reiserfs_write_unlock(sb); 2514 if (err) 2515 return err; 2516 if (!buffer_mapped(&tmp_bh)) /* A hole? */ 2517 memset(data, 0, tocopy); 2518 else { 2519 bh = sb_bread(sb, tmp_bh.b_blocknr); 2520 if (!bh) 2521 return -EIO; 2522 memcpy(data, bh->b_data + offset, tocopy); 2523 brelse(bh); 2524 } 2525 offset = 0; 2526 toread -= tocopy; 2527 data += tocopy; 2528 blk++; 2529 } 2530 return len; 2531 } 2532 2533 /* 2534 * Write to quotafile (we know the transaction is already started and has 2535 * enough credits) 2536 */ 2537 static ssize_t reiserfs_quota_write(struct super_block *sb, int type, 2538 const char *data, size_t len, loff_t off) 2539 { 2540 struct inode *inode = sb_dqopt(sb)->files[type]; 2541 unsigned long blk = off >> sb->s_blocksize_bits; 2542 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; 2543 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; 2544 size_t towrite = len; 2545 struct buffer_head tmp_bh, *bh; 2546 2547 if (!current->journal_info) { 2548 printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n", 2549 (unsigned long long)off, (unsigned long long)len); 2550 return -EIO; 2551 } 2552 while (towrite > 0) { 2553 tocopy = min_t(unsigned long, sb->s_blocksize - offset, towrite); 2554 tmp_bh.b_state = 0; 2555 reiserfs_write_lock(sb); 2556 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); 2557 reiserfs_write_unlock(sb); 2558 if (err) 2559 goto out; 2560 if (offset || tocopy != sb->s_blocksize) 2561 bh = sb_bread(sb, tmp_bh.b_blocknr); 2562 else 2563 bh = sb_getblk(sb, tmp_bh.b_blocknr); 2564 if (!bh) { 2565 err = -EIO; 2566 goto out; 2567 } 2568 lock_buffer(bh); 2569 memcpy(bh->b_data + offset, data, tocopy); 2570 flush_dcache_page(bh->b_page); 2571 set_buffer_uptodate(bh); 2572 unlock_buffer(bh); 2573 reiserfs_write_lock(sb); 2574 reiserfs_prepare_for_journal(sb, bh, 1); 2575 journal_mark_dirty(current->journal_info, bh); 2576 if (!journal_quota) 2577 reiserfs_add_ordered_list(inode, bh); 2578 reiserfs_write_unlock(sb); 2579 brelse(bh); 2580 offset = 0; 2581 towrite -= tocopy; 2582 data += tocopy; 2583 blk++; 2584 } 2585 out: 2586 if (len == towrite) 2587 return err; 2588 if (inode->i_size < off + len - towrite) 2589 i_size_write(inode, off + len - towrite); 2590 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); 2591 mark_inode_dirty(inode); 2592 return len - towrite; 2593 } 2594 2595 #endif 2596 2597 static struct dentry *get_super_block(struct file_system_type *fs_type, 2598 int flags, const char *dev_name, 2599 void *data) 2600 { 2601 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super); 2602 } 2603 2604 static int __init init_reiserfs_fs(void) 2605 { 2606 int ret; 2607 2608 ret = init_inodecache(); 2609 if (ret) 2610 return ret; 2611 2612 reiserfs_proc_info_global_init(); 2613 2614 ret = register_filesystem(&reiserfs_fs_type); 2615 if (ret) 2616 goto out; 2617 2618 return 0; 2619 out: 2620 reiserfs_proc_info_global_done(); 2621 destroy_inodecache(); 2622 2623 return ret; 2624 } 2625 2626 static void __exit exit_reiserfs_fs(void) 2627 { 2628 reiserfs_proc_info_global_done(); 2629 unregister_filesystem(&reiserfs_fs_type); 2630 destroy_inodecache(); 2631 } 2632 2633 struct file_system_type reiserfs_fs_type = { 2634 .owner = THIS_MODULE, 2635 .name = "reiserfs", 2636 .mount = get_super_block, 2637 .kill_sb = reiserfs_kill_sb, 2638 .fs_flags = FS_REQUIRES_DEV, 2639 }; 2640 MODULE_ALIAS_FS("reiserfs"); 2641 2642 MODULE_DESCRIPTION("ReiserFS journaled filesystem"); 2643 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>"); 2644 MODULE_LICENSE("GPL"); 2645 2646 module_init(init_reiserfs_fs); 2647 module_exit(exit_reiserfs_fs); 2648