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(s->s_fs_info); 633 s->s_fs_info = NULL; 634 } 635 636 static struct kmem_cache *reiserfs_inode_cachep; 637 638 static struct inode *reiserfs_alloc_inode(struct super_block *sb) 639 { 640 struct reiserfs_inode_info *ei; 641 ei = kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL); 642 if (!ei) 643 return NULL; 644 atomic_set(&ei->openers, 0); 645 mutex_init(&ei->tailpack); 646 #ifdef CONFIG_QUOTA 647 memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 648 #endif 649 650 return &ei->vfs_inode; 651 } 652 653 static void reiserfs_i_callback(struct rcu_head *head) 654 { 655 struct inode *inode = container_of(head, struct inode, i_rcu); 656 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); 657 } 658 659 static void reiserfs_destroy_inode(struct inode *inode) 660 { 661 call_rcu(&inode->i_rcu, reiserfs_i_callback); 662 } 663 664 static void init_once(void *foo) 665 { 666 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo; 667 668 INIT_LIST_HEAD(&ei->i_prealloc_list); 669 inode_init_once(&ei->vfs_inode); 670 } 671 672 static int __init init_inodecache(void) 673 { 674 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", 675 sizeof(struct 676 reiserfs_inode_info), 677 0, (SLAB_RECLAIM_ACCOUNT| 678 SLAB_MEM_SPREAD| 679 SLAB_ACCOUNT), 680 init_once); 681 if (reiserfs_inode_cachep == NULL) 682 return -ENOMEM; 683 return 0; 684 } 685 686 static void destroy_inodecache(void) 687 { 688 /* 689 * Make sure all delayed rcu free inodes are flushed before we 690 * destroy cache. 691 */ 692 rcu_barrier(); 693 kmem_cache_destroy(reiserfs_inode_cachep); 694 } 695 696 /* we don't mark inodes dirty, we just log them */ 697 static void reiserfs_dirty_inode(struct inode *inode, int flags) 698 { 699 struct reiserfs_transaction_handle th; 700 701 int err = 0; 702 703 if (sb_rdonly(inode->i_sb)) { 704 reiserfs_warning(inode->i_sb, "clm-6006", 705 "writing inode %lu on readonly FS", 706 inode->i_ino); 707 return; 708 } 709 reiserfs_write_lock(inode->i_sb); 710 711 /* 712 * this is really only used for atime updates, so they don't have 713 * to be included in O_SYNC or fsync 714 */ 715 err = journal_begin(&th, inode->i_sb, 1); 716 if (err) 717 goto out; 718 719 reiserfs_update_sd(&th, inode); 720 journal_end(&th); 721 722 out: 723 reiserfs_write_unlock(inode->i_sb); 724 } 725 726 static int reiserfs_show_options(struct seq_file *seq, struct dentry *root) 727 { 728 struct super_block *s = root->d_sb; 729 struct reiserfs_journal *journal = SB_JOURNAL(s); 730 long opts = REISERFS_SB(s)->s_mount_opt; 731 732 if (opts & (1 << REISERFS_LARGETAIL)) 733 seq_puts(seq, ",tails=on"); 734 else if (!(opts & (1 << REISERFS_SMALLTAIL))) 735 seq_puts(seq, ",notail"); 736 /* tails=small is default so we don't show it */ 737 738 if (!(opts & (1 << REISERFS_BARRIER_FLUSH))) 739 seq_puts(seq, ",barrier=none"); 740 /* barrier=flush is default so we don't show it */ 741 742 if (opts & (1 << REISERFS_ERROR_CONTINUE)) 743 seq_puts(seq, ",errors=continue"); 744 else if (opts & (1 << REISERFS_ERROR_PANIC)) 745 seq_puts(seq, ",errors=panic"); 746 /* errors=ro is default so we don't show it */ 747 748 if (opts & (1 << REISERFS_DATA_LOG)) 749 seq_puts(seq, ",data=journal"); 750 else if (opts & (1 << REISERFS_DATA_WRITEBACK)) 751 seq_puts(seq, ",data=writeback"); 752 /* data=ordered is default so we don't show it */ 753 754 if (opts & (1 << REISERFS_ATTRS)) 755 seq_puts(seq, ",attrs"); 756 757 if (opts & (1 << REISERFS_XATTRS_USER)) 758 seq_puts(seq, ",user_xattr"); 759 760 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT)) 761 seq_puts(seq, ",expose_privroot"); 762 763 if (opts & (1 << REISERFS_POSIXACL)) 764 seq_puts(seq, ",acl"); 765 766 if (REISERFS_SB(s)->s_jdev) 767 seq_show_option(seq, "jdev", REISERFS_SB(s)->s_jdev); 768 769 if (journal->j_max_commit_age != journal->j_default_max_commit_age) 770 seq_printf(seq, ",commit=%d", journal->j_max_commit_age); 771 772 #ifdef CONFIG_QUOTA 773 if (REISERFS_SB(s)->s_qf_names[USRQUOTA]) 774 seq_show_option(seq, "usrjquota", 775 REISERFS_SB(s)->s_qf_names[USRQUOTA]); 776 else if (opts & (1 << REISERFS_USRQUOTA)) 777 seq_puts(seq, ",usrquota"); 778 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA]) 779 seq_show_option(seq, "grpjquota", 780 REISERFS_SB(s)->s_qf_names[GRPQUOTA]); 781 else if (opts & (1 << REISERFS_GRPQUOTA)) 782 seq_puts(seq, ",grpquota"); 783 if (REISERFS_SB(s)->s_jquota_fmt) { 784 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD) 785 seq_puts(seq, ",jqfmt=vfsold"); 786 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0) 787 seq_puts(seq, ",jqfmt=vfsv0"); 788 } 789 #endif 790 791 /* Block allocator options */ 792 if (opts & (1 << REISERFS_NO_BORDER)) 793 seq_puts(seq, ",block-allocator=noborder"); 794 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION)) 795 seq_puts(seq, ",block-allocator=no_unhashed_relocation"); 796 if (opts & (1 << REISERFS_HASHED_RELOCATION)) 797 seq_puts(seq, ",block-allocator=hashed_relocation"); 798 if (opts & (1 << REISERFS_TEST4)) 799 seq_puts(seq, ",block-allocator=test4"); 800 show_alloc_options(seq, s); 801 return 0; 802 } 803 804 #ifdef CONFIG_QUOTA 805 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, 806 size_t, loff_t); 807 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, 808 loff_t); 809 810 static struct dquot **reiserfs_get_dquots(struct inode *inode) 811 { 812 return REISERFS_I(inode)->i_dquot; 813 } 814 #endif 815 816 static const struct super_operations reiserfs_sops = { 817 .alloc_inode = reiserfs_alloc_inode, 818 .destroy_inode = reiserfs_destroy_inode, 819 .write_inode = reiserfs_write_inode, 820 .dirty_inode = reiserfs_dirty_inode, 821 .evict_inode = reiserfs_evict_inode, 822 .put_super = reiserfs_put_super, 823 .sync_fs = reiserfs_sync_fs, 824 .freeze_fs = reiserfs_freeze, 825 .unfreeze_fs = reiserfs_unfreeze, 826 .statfs = reiserfs_statfs, 827 .remount_fs = reiserfs_remount, 828 .show_options = reiserfs_show_options, 829 #ifdef CONFIG_QUOTA 830 .quota_read = reiserfs_quota_read, 831 .quota_write = reiserfs_quota_write, 832 .get_dquots = reiserfs_get_dquots, 833 #endif 834 }; 835 836 #ifdef CONFIG_QUOTA 837 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") 838 839 static int reiserfs_write_dquot(struct dquot *); 840 static int reiserfs_acquire_dquot(struct dquot *); 841 static int reiserfs_release_dquot(struct dquot *); 842 static int reiserfs_mark_dquot_dirty(struct dquot *); 843 static int reiserfs_write_info(struct super_block *, int); 844 static int reiserfs_quota_on(struct super_block *, int, int, const struct path *); 845 846 static const struct dquot_operations reiserfs_quota_operations = { 847 .write_dquot = reiserfs_write_dquot, 848 .acquire_dquot = reiserfs_acquire_dquot, 849 .release_dquot = reiserfs_release_dquot, 850 .mark_dirty = reiserfs_mark_dquot_dirty, 851 .write_info = reiserfs_write_info, 852 .alloc_dquot = dquot_alloc, 853 .destroy_dquot = dquot_destroy, 854 .get_next_id = dquot_get_next_id, 855 }; 856 857 static const struct quotactl_ops reiserfs_qctl_operations = { 858 .quota_on = reiserfs_quota_on, 859 .quota_off = reiserfs_quota_off, 860 .quota_sync = dquot_quota_sync, 861 .get_state = dquot_get_state, 862 .set_info = dquot_set_dqinfo, 863 .get_dqblk = dquot_get_dqblk, 864 .set_dqblk = dquot_set_dqblk, 865 }; 866 #endif 867 868 static const struct export_operations reiserfs_export_ops = { 869 .encode_fh = reiserfs_encode_fh, 870 .fh_to_dentry = reiserfs_fh_to_dentry, 871 .fh_to_parent = reiserfs_fh_to_parent, 872 .get_parent = reiserfs_get_parent, 873 }; 874 875 /* 876 * this struct is used in reiserfs_getopt () for containing the value for 877 * those mount options that have values rather than being toggles. 878 */ 879 typedef struct { 880 char *value; 881 /* 882 * bitmask which is to set on mount_options bitmask 883 * when this value is found, 0 is no bits are to be changed. 884 */ 885 int setmask; 886 /* 887 * bitmask which is to clear on mount_options bitmask 888 * when this value is found, 0 is no bits are to be changed. 889 * This is applied BEFORE setmask 890 */ 891 int clrmask; 892 } arg_desc_t; 893 894 /* Set this bit in arg_required to allow empty arguments */ 895 #define REISERFS_OPT_ALLOWEMPTY 31 896 897 /* 898 * this struct is used in reiserfs_getopt() for describing the 899 * set of reiserfs mount options 900 */ 901 typedef struct { 902 char *option_name; 903 904 /* 0 if argument is not required, not 0 otherwise */ 905 int arg_required; 906 907 /* list of values accepted by an option */ 908 const arg_desc_t *values; 909 910 /* 911 * bitmask which is to set on mount_options bitmask 912 * when this value is found, 0 is no bits are to be changed. 913 */ 914 int setmask; 915 916 /* 917 * bitmask which is to clear on mount_options bitmask 918 * when this value is found, 0 is no bits are to be changed. 919 * This is applied BEFORE setmask 920 */ 921 int clrmask; 922 } opt_desc_t; 923 924 /* possible values for -o data= */ 925 static const arg_desc_t logging_mode[] = { 926 {"ordered", 1 << REISERFS_DATA_ORDERED, 927 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)}, 928 {"journal", 1 << REISERFS_DATA_LOG, 929 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)}, 930 {"writeback", 1 << REISERFS_DATA_WRITEBACK, 931 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)}, 932 {.value = NULL} 933 }; 934 935 /* possible values for -o barrier= */ 936 static const arg_desc_t barrier_mode[] = { 937 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH}, 938 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE}, 939 {.value = NULL} 940 }; 941 942 /* 943 * possible values for "-o block-allocator=" and bits which are to be set in 944 * s_mount_opt of reiserfs specific part of in-core super block 945 */ 946 static const arg_desc_t balloc[] = { 947 {"noborder", 1 << REISERFS_NO_BORDER, 0}, 948 {"border", 0, 1 << REISERFS_NO_BORDER}, 949 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0}, 950 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0}, 951 {"test4", 1 << REISERFS_TEST4, 0}, 952 {"notest4", 0, 1 << REISERFS_TEST4}, 953 {NULL, 0, 0} 954 }; 955 956 static const arg_desc_t tails[] = { 957 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL}, 958 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, 959 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL}, 960 {NULL, 0, 0} 961 }; 962 963 static const arg_desc_t error_actions[] = { 964 {"panic", 1 << REISERFS_ERROR_PANIC, 965 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, 966 {"ro-remount", 1 << REISERFS_ERROR_RO, 967 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, 968 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG 969 {"continue", 1 << REISERFS_ERROR_CONTINUE, 970 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, 971 #endif 972 {NULL, 0, 0}, 973 }; 974 975 /* 976 * proceed only one option from a list *cur - string containing of mount 977 * options 978 * opts - array of options which are accepted 979 * opt_arg - if option is found and requires an argument and if it is specifed 980 * in the input - pointer to the argument is stored here 981 * bit_flags - if option requires to set a certain bit - it is set here 982 * return -1 if unknown option is found, opt->arg_required otherwise 983 */ 984 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts, 985 char **opt_arg, unsigned long *bit_flags) 986 { 987 char *p; 988 /* 989 * foo=bar, 990 * ^ ^ ^ 991 * | | +-- option_end 992 * | +-- arg_start 993 * +-- option_start 994 */ 995 const opt_desc_t *opt; 996 const arg_desc_t *arg; 997 998 p = *cur; 999 1000 /* assume argument cannot contain commas */ 1001 *cur = strchr(p, ','); 1002 if (*cur) { 1003 *(*cur) = '\0'; 1004 (*cur)++; 1005 } 1006 1007 if (!strncmp(p, "alloc=", 6)) { 1008 /* 1009 * Ugly special case, probably we should redo options 1010 * parser so that it can understand several arguments for 1011 * some options, also so that it can fill several bitfields 1012 * with option values. 1013 */ 1014 if (reiserfs_parse_alloc_options(s, p + 6)) { 1015 return -1; 1016 } else { 1017 return 0; 1018 } 1019 } 1020 1021 /* for every option in the list */ 1022 for (opt = opts; opt->option_name; opt++) { 1023 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) { 1024 if (bit_flags) { 1025 if (opt->clrmask == 1026 (1 << REISERFS_UNSUPPORTED_OPT)) 1027 reiserfs_warning(s, "super-6500", 1028 "%s not supported.\n", 1029 p); 1030 else 1031 *bit_flags &= ~opt->clrmask; 1032 if (opt->setmask == 1033 (1 << REISERFS_UNSUPPORTED_OPT)) 1034 reiserfs_warning(s, "super-6501", 1035 "%s not supported.\n", 1036 p); 1037 else 1038 *bit_flags |= opt->setmask; 1039 } 1040 break; 1041 } 1042 } 1043 if (!opt->option_name) { 1044 reiserfs_warning(s, "super-6502", 1045 "unknown mount option \"%s\"", p); 1046 return -1; 1047 } 1048 1049 p += strlen(opt->option_name); 1050 switch (*p) { 1051 case '=': 1052 if (!opt->arg_required) { 1053 reiserfs_warning(s, "super-6503", 1054 "the option \"%s\" does not " 1055 "require an argument\n", 1056 opt->option_name); 1057 return -1; 1058 } 1059 break; 1060 1061 case 0: 1062 if (opt->arg_required) { 1063 reiserfs_warning(s, "super-6504", 1064 "the option \"%s\" requires an " 1065 "argument\n", opt->option_name); 1066 return -1; 1067 } 1068 break; 1069 default: 1070 reiserfs_warning(s, "super-6505", 1071 "head of option \"%s\" is only correct\n", 1072 opt->option_name); 1073 return -1; 1074 } 1075 1076 /* 1077 * move to the argument, or to next option if argument is not 1078 * required 1079 */ 1080 p++; 1081 1082 if (opt->arg_required 1083 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY)) 1084 && !strlen(p)) { 1085 /* this catches "option=," if not allowed */ 1086 reiserfs_warning(s, "super-6506", 1087 "empty argument for \"%s\"\n", 1088 opt->option_name); 1089 return -1; 1090 } 1091 1092 if (!opt->values) { 1093 /* *=NULLopt_arg contains pointer to argument */ 1094 *opt_arg = p; 1095 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY); 1096 } 1097 1098 /* values possible for this option are listed in opt->values */ 1099 for (arg = opt->values; arg->value; arg++) { 1100 if (!strcmp(p, arg->value)) { 1101 if (bit_flags) { 1102 *bit_flags &= ~arg->clrmask; 1103 *bit_flags |= arg->setmask; 1104 } 1105 return opt->arg_required; 1106 } 1107 } 1108 1109 reiserfs_warning(s, "super-6506", 1110 "bad value \"%s\" for option \"%s\"\n", p, 1111 opt->option_name); 1112 return -1; 1113 } 1114 1115 /* returns 0 if something is wrong in option string, 1 - otherwise */ 1116 static int reiserfs_parse_options(struct super_block *s, 1117 1118 /* string given via mount's -o */ 1119 char *options, 1120 1121 /* 1122 * after the parsing phase, contains the 1123 * collection of bitflags defining what 1124 * mount options were selected. 1125 */ 1126 unsigned long *mount_options, 1127 1128 /* strtol-ed from NNN of resize=NNN */ 1129 unsigned long *blocks, 1130 char **jdev_name, 1131 unsigned int *commit_max_age, 1132 char **qf_names, 1133 unsigned int *qfmt) 1134 { 1135 int c; 1136 char *arg = NULL; 1137 char *pos; 1138 opt_desc_t opts[] = { 1139 /* 1140 * Compatibility stuff, so that -o notail for old 1141 * setups still work 1142 */ 1143 {"tails",.arg_required = 't',.values = tails}, 1144 {"notail",.clrmask = 1145 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, 1146 {"conv",.setmask = 1 << REISERFS_CONVERT}, 1147 {"attrs",.setmask = 1 << REISERFS_ATTRS}, 1148 {"noattrs",.clrmask = 1 << REISERFS_ATTRS}, 1149 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT}, 1150 #ifdef CONFIG_REISERFS_FS_XATTR 1151 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER}, 1152 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER}, 1153 #else 1154 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, 1155 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, 1156 #endif 1157 #ifdef CONFIG_REISERFS_FS_POSIX_ACL 1158 {"acl",.setmask = 1 << REISERFS_POSIXACL}, 1159 {"noacl",.clrmask = 1 << REISERFS_POSIXACL}, 1160 #else 1161 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, 1162 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, 1163 #endif 1164 {.option_name = "nolog"}, 1165 {"replayonly",.setmask = 1 << REPLAYONLY}, 1166 {"block-allocator",.arg_required = 'a',.values = balloc}, 1167 {"data",.arg_required = 'd',.values = logging_mode}, 1168 {"barrier",.arg_required = 'b',.values = barrier_mode}, 1169 {"resize",.arg_required = 'r',.values = NULL}, 1170 {"jdev",.arg_required = 'j',.values = NULL}, 1171 {"nolargeio",.arg_required = 'w',.values = NULL}, 1172 {"commit",.arg_required = 'c',.values = NULL}, 1173 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA}, 1174 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA}, 1175 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA}, 1176 {"errors",.arg_required = 'e',.values = error_actions}, 1177 {"usrjquota",.arg_required = 1178 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, 1179 {"grpjquota",.arg_required = 1180 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, 1181 {"jqfmt",.arg_required = 'f',.values = NULL}, 1182 {.option_name = NULL} 1183 }; 1184 1185 *blocks = 0; 1186 if (!options || !*options) 1187 /* 1188 * use default configuration: create tails, journaling on, no 1189 * conversion to newest format 1190 */ 1191 return 1; 1192 1193 for (pos = options; pos;) { 1194 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options); 1195 if (c == -1) 1196 /* wrong option is given */ 1197 return 0; 1198 1199 if (c == 'r') { 1200 char *p; 1201 1202 p = NULL; 1203 /* "resize=NNN" or "resize=auto" */ 1204 1205 if (!strcmp(arg, "auto")) { 1206 /* From JFS code, to auto-get the size. */ 1207 *blocks = 1208 i_size_read(s->s_bdev->bd_inode) >> s-> 1209 s_blocksize_bits; 1210 } else { 1211 *blocks = simple_strtoul(arg, &p, 0); 1212 if (*p != '\0') { 1213 /* NNN does not look like a number */ 1214 reiserfs_warning(s, "super-6507", 1215 "bad value %s for " 1216 "-oresize\n", arg); 1217 return 0; 1218 } 1219 } 1220 } 1221 1222 if (c == 'c') { 1223 char *p = NULL; 1224 unsigned long val = simple_strtoul(arg, &p, 0); 1225 /* commit=NNN (time in seconds) */ 1226 if (*p != '\0' || val >= (unsigned int)-1) { 1227 reiserfs_warning(s, "super-6508", 1228 "bad value %s for -ocommit\n", 1229 arg); 1230 return 0; 1231 } 1232 *commit_max_age = (unsigned int)val; 1233 } 1234 1235 if (c == 'w') { 1236 reiserfs_warning(s, "super-6509", "nolargeio option " 1237 "is no longer supported"); 1238 return 0; 1239 } 1240 1241 if (c == 'j') { 1242 if (arg && *arg && jdev_name) { 1243 /* Hm, already assigned? */ 1244 if (*jdev_name) { 1245 reiserfs_warning(s, "super-6510", 1246 "journal device was " 1247 "already specified to " 1248 "be %s", *jdev_name); 1249 return 0; 1250 } 1251 *jdev_name = arg; 1252 } 1253 } 1254 #ifdef CONFIG_QUOTA 1255 if (c == 'u' || c == 'g') { 1256 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; 1257 1258 if (sb_any_quota_loaded(s) && 1259 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) { 1260 reiserfs_warning(s, "super-6511", 1261 "cannot change journaled " 1262 "quota options when quota " 1263 "turned on."); 1264 return 0; 1265 } 1266 if (*arg) { /* Some filename specified? */ 1267 if (REISERFS_SB(s)->s_qf_names[qtype] 1268 && strcmp(REISERFS_SB(s)->s_qf_names[qtype], 1269 arg)) { 1270 reiserfs_warning(s, "super-6512", 1271 "%s quota file " 1272 "already specified.", 1273 QTYPE2NAME(qtype)); 1274 return 0; 1275 } 1276 if (strchr(arg, '/')) { 1277 reiserfs_warning(s, "super-6513", 1278 "quotafile must be " 1279 "on filesystem root."); 1280 return 0; 1281 } 1282 qf_names[qtype] = kstrdup(arg, GFP_KERNEL); 1283 if (!qf_names[qtype]) { 1284 reiserfs_warning(s, "reiserfs-2502", 1285 "not enough memory " 1286 "for storing " 1287 "quotafile name."); 1288 return 0; 1289 } 1290 if (qtype == USRQUOTA) 1291 *mount_options |= 1 << REISERFS_USRQUOTA; 1292 else 1293 *mount_options |= 1 << REISERFS_GRPQUOTA; 1294 } else { 1295 if (qf_names[qtype] != 1296 REISERFS_SB(s)->s_qf_names[qtype]) 1297 kfree(qf_names[qtype]); 1298 qf_names[qtype] = NULL; 1299 if (qtype == USRQUOTA) 1300 *mount_options &= ~(1 << REISERFS_USRQUOTA); 1301 else 1302 *mount_options &= ~(1 << REISERFS_GRPQUOTA); 1303 } 1304 } 1305 if (c == 'f') { 1306 if (!strcmp(arg, "vfsold")) 1307 *qfmt = QFMT_VFS_OLD; 1308 else if (!strcmp(arg, "vfsv0")) 1309 *qfmt = QFMT_VFS_V0; 1310 else { 1311 reiserfs_warning(s, "super-6514", 1312 "unknown quota format " 1313 "specified."); 1314 return 0; 1315 } 1316 if (sb_any_quota_loaded(s) && 1317 *qfmt != REISERFS_SB(s)->s_jquota_fmt) { 1318 reiserfs_warning(s, "super-6515", 1319 "cannot change journaled " 1320 "quota options when quota " 1321 "turned on."); 1322 return 0; 1323 } 1324 } 1325 #else 1326 if (c == 'u' || c == 'g' || c == 'f') { 1327 reiserfs_warning(s, "reiserfs-2503", "journaled " 1328 "quota options not supported."); 1329 return 0; 1330 } 1331 #endif 1332 } 1333 1334 #ifdef CONFIG_QUOTA 1335 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt 1336 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) { 1337 reiserfs_warning(s, "super-6515", 1338 "journaled quota format not specified."); 1339 return 0; 1340 } 1341 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) && 1342 sb_has_quota_loaded(s, USRQUOTA)) || 1343 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) && 1344 sb_has_quota_loaded(s, GRPQUOTA))) { 1345 reiserfs_warning(s, "super-6516", "quota options must " 1346 "be present when quota is turned on."); 1347 return 0; 1348 } 1349 #endif 1350 1351 return 1; 1352 } 1353 1354 static void switch_data_mode(struct super_block *s, unsigned long mode) 1355 { 1356 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | 1357 (1 << REISERFS_DATA_ORDERED) | 1358 (1 << REISERFS_DATA_WRITEBACK)); 1359 REISERFS_SB(s)->s_mount_opt |= (1 << mode); 1360 } 1361 1362 static void handle_data_mode(struct super_block *s, unsigned long mount_options) 1363 { 1364 if (mount_options & (1 << REISERFS_DATA_LOG)) { 1365 if (!reiserfs_data_log(s)) { 1366 switch_data_mode(s, REISERFS_DATA_LOG); 1367 reiserfs_info(s, "switching to journaled data mode\n"); 1368 } 1369 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { 1370 if (!reiserfs_data_ordered(s)) { 1371 switch_data_mode(s, REISERFS_DATA_ORDERED); 1372 reiserfs_info(s, "switching to ordered data mode\n"); 1373 } 1374 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { 1375 if (!reiserfs_data_writeback(s)) { 1376 switch_data_mode(s, REISERFS_DATA_WRITEBACK); 1377 reiserfs_info(s, "switching to writeback data mode\n"); 1378 } 1379 } 1380 } 1381 1382 static void handle_barrier_mode(struct super_block *s, unsigned long bits) 1383 { 1384 int flush = (1 << REISERFS_BARRIER_FLUSH); 1385 int none = (1 << REISERFS_BARRIER_NONE); 1386 int all_barrier = flush | none; 1387 1388 if (bits & all_barrier) { 1389 REISERFS_SB(s)->s_mount_opt &= ~all_barrier; 1390 if (bits & flush) { 1391 REISERFS_SB(s)->s_mount_opt |= flush; 1392 printk("reiserfs: enabling write barrier flush mode\n"); 1393 } else if (bits & none) { 1394 REISERFS_SB(s)->s_mount_opt |= none; 1395 printk("reiserfs: write barriers turned off\n"); 1396 } 1397 } 1398 } 1399 1400 static void handle_attrs(struct super_block *s) 1401 { 1402 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s); 1403 1404 if (reiserfs_attrs(s)) { 1405 if (old_format_only(s)) { 1406 reiserfs_warning(s, "super-6517", "cannot support " 1407 "attributes on 3.5.x disk format"); 1408 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); 1409 return; 1410 } 1411 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) { 1412 reiserfs_warning(s, "super-6518", "cannot support " 1413 "attributes until flag is set in " 1414 "super-block"); 1415 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); 1416 } 1417 } 1418 } 1419 1420 #ifdef CONFIG_QUOTA 1421 static void handle_quota_files(struct super_block *s, char **qf_names, 1422 unsigned int *qfmt) 1423 { 1424 int i; 1425 1426 for (i = 0; i < REISERFS_MAXQUOTAS; i++) { 1427 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) 1428 kfree(REISERFS_SB(s)->s_qf_names[i]); 1429 REISERFS_SB(s)->s_qf_names[i] = qf_names[i]; 1430 } 1431 if (*qfmt) 1432 REISERFS_SB(s)->s_jquota_fmt = *qfmt; 1433 } 1434 #endif 1435 1436 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) 1437 { 1438 struct reiserfs_super_block *rs; 1439 struct reiserfs_transaction_handle th; 1440 unsigned long blocks; 1441 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; 1442 unsigned long safe_mask = 0; 1443 unsigned int commit_max_age = (unsigned int)-1; 1444 struct reiserfs_journal *journal = SB_JOURNAL(s); 1445 char *new_opts; 1446 int err; 1447 char *qf_names[REISERFS_MAXQUOTAS]; 1448 unsigned int qfmt = 0; 1449 #ifdef CONFIG_QUOTA 1450 int i; 1451 #endif 1452 1453 new_opts = kstrdup(arg, GFP_KERNEL); 1454 if (arg && !new_opts) 1455 return -ENOMEM; 1456 1457 sync_filesystem(s); 1458 reiserfs_write_lock(s); 1459 1460 #ifdef CONFIG_QUOTA 1461 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names)); 1462 #endif 1463 1464 rs = SB_DISK_SUPER_BLOCK(s); 1465 1466 if (!reiserfs_parse_options 1467 (s, arg, &mount_options, &blocks, NULL, &commit_max_age, 1468 qf_names, &qfmt)) { 1469 #ifdef CONFIG_QUOTA 1470 for (i = 0; i < REISERFS_MAXQUOTAS; i++) 1471 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) 1472 kfree(qf_names[i]); 1473 #endif 1474 err = -EINVAL; 1475 goto out_err_unlock; 1476 } 1477 #ifdef CONFIG_QUOTA 1478 handle_quota_files(s, qf_names, &qfmt); 1479 #endif 1480 1481 handle_attrs(s); 1482 1483 /* Add options that are safe here */ 1484 safe_mask |= 1 << REISERFS_SMALLTAIL; 1485 safe_mask |= 1 << REISERFS_LARGETAIL; 1486 safe_mask |= 1 << REISERFS_NO_BORDER; 1487 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; 1488 safe_mask |= 1 << REISERFS_HASHED_RELOCATION; 1489 safe_mask |= 1 << REISERFS_TEST4; 1490 safe_mask |= 1 << REISERFS_ATTRS; 1491 safe_mask |= 1 << REISERFS_XATTRS_USER; 1492 safe_mask |= 1 << REISERFS_POSIXACL; 1493 safe_mask |= 1 << REISERFS_BARRIER_FLUSH; 1494 safe_mask |= 1 << REISERFS_BARRIER_NONE; 1495 safe_mask |= 1 << REISERFS_ERROR_RO; 1496 safe_mask |= 1 << REISERFS_ERROR_CONTINUE; 1497 safe_mask |= 1 << REISERFS_ERROR_PANIC; 1498 safe_mask |= 1 << REISERFS_USRQUOTA; 1499 safe_mask |= 1 << REISERFS_GRPQUOTA; 1500 1501 /* 1502 * Update the bitmask, taking care to keep 1503 * the bits we're not allowed to change here 1504 */ 1505 REISERFS_SB(s)->s_mount_opt = 1506 (REISERFS_SB(s)-> 1507 s_mount_opt & ~safe_mask) | (mount_options & safe_mask); 1508 1509 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) { 1510 journal->j_max_commit_age = commit_max_age; 1511 journal->j_max_trans_age = commit_max_age; 1512 } else if (commit_max_age == 0) { 1513 /* 0 means restore defaults. */ 1514 journal->j_max_commit_age = journal->j_default_max_commit_age; 1515 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; 1516 } 1517 1518 if (blocks) { 1519 err = reiserfs_resize(s, blocks); 1520 if (err != 0) 1521 goto out_err_unlock; 1522 } 1523 1524 if (*mount_flags & SB_RDONLY) { 1525 reiserfs_write_unlock(s); 1526 reiserfs_xattr_init(s, *mount_flags); 1527 /* remount read-only */ 1528 if (sb_rdonly(s)) 1529 /* it is read-only already */ 1530 goto out_ok_unlocked; 1531 1532 err = dquot_suspend(s, -1); 1533 if (err < 0) 1534 goto out_err; 1535 1536 /* try to remount file system with read-only permissions */ 1537 if (sb_umount_state(rs) == REISERFS_VALID_FS 1538 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { 1539 goto out_ok_unlocked; 1540 } 1541 1542 reiserfs_write_lock(s); 1543 1544 err = journal_begin(&th, s, 10); 1545 if (err) 1546 goto out_err_unlock; 1547 1548 /* Mounting a rw partition read-only. */ 1549 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); 1550 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state); 1551 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); 1552 } else { 1553 /* remount read-write */ 1554 if (!sb_rdonly(s)) { 1555 reiserfs_write_unlock(s); 1556 reiserfs_xattr_init(s, *mount_flags); 1557 goto out_ok_unlocked; /* We are read-write already */ 1558 } 1559 1560 if (reiserfs_is_journal_aborted(journal)) { 1561 err = journal->j_errno; 1562 goto out_err_unlock; 1563 } 1564 1565 handle_data_mode(s, mount_options); 1566 handle_barrier_mode(s, mount_options); 1567 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); 1568 1569 /* now it is safe to call journal_begin */ 1570 s->s_flags &= ~SB_RDONLY; 1571 err = journal_begin(&th, s, 10); 1572 if (err) 1573 goto out_err_unlock; 1574 1575 /* Mount a partition which is read-only, read-write */ 1576 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); 1577 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); 1578 s->s_flags &= ~SB_RDONLY; 1579 set_sb_umount_state(rs, REISERFS_ERROR_FS); 1580 if (!old_format_only(s)) 1581 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); 1582 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ 1583 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); 1584 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS; 1585 } 1586 /* this will force a full flush of all journal lists */ 1587 SB_JOURNAL(s)->j_must_wait = 1; 1588 err = journal_end(&th); 1589 if (err) 1590 goto out_err_unlock; 1591 1592 reiserfs_write_unlock(s); 1593 if (!(*mount_flags & SB_RDONLY)) { 1594 dquot_resume(s, -1); 1595 reiserfs_write_lock(s); 1596 finish_unfinished(s); 1597 reiserfs_write_unlock(s); 1598 reiserfs_xattr_init(s, *mount_flags); 1599 } 1600 1601 out_ok_unlocked: 1602 return 0; 1603 1604 out_err_unlock: 1605 reiserfs_write_unlock(s); 1606 out_err: 1607 kfree(new_opts); 1608 return err; 1609 } 1610 1611 static int read_super_block(struct super_block *s, int offset) 1612 { 1613 struct buffer_head *bh; 1614 struct reiserfs_super_block *rs; 1615 int fs_blocksize; 1616 1617 bh = sb_bread(s, offset / s->s_blocksize); 1618 if (!bh) { 1619 reiserfs_warning(s, "sh-2006", 1620 "bread failed (dev %s, block %lu, size %lu)", 1621 s->s_id, offset / s->s_blocksize, 1622 s->s_blocksize); 1623 return 1; 1624 } 1625 1626 rs = (struct reiserfs_super_block *)bh->b_data; 1627 if (!is_any_reiserfs_magic_string(rs)) { 1628 brelse(bh); 1629 return 1; 1630 } 1631 /* 1632 * ok, reiserfs signature (old or new) found in at the given offset 1633 */ 1634 fs_blocksize = sb_blocksize(rs); 1635 brelse(bh); 1636 sb_set_blocksize(s, fs_blocksize); 1637 1638 bh = sb_bread(s, offset / s->s_blocksize); 1639 if (!bh) { 1640 reiserfs_warning(s, "sh-2007", 1641 "bread failed (dev %s, block %lu, size %lu)", 1642 s->s_id, offset / s->s_blocksize, 1643 s->s_blocksize); 1644 return 1; 1645 } 1646 1647 rs = (struct reiserfs_super_block *)bh->b_data; 1648 if (sb_blocksize(rs) != s->s_blocksize) { 1649 reiserfs_warning(s, "sh-2011", "can't find a reiserfs " 1650 "filesystem on (dev %s, block %llu, size %lu)", 1651 s->s_id, 1652 (unsigned long long)bh->b_blocknr, 1653 s->s_blocksize); 1654 brelse(bh); 1655 return 1; 1656 } 1657 1658 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) { 1659 brelse(bh); 1660 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck " 1661 "--rebuild-tree run detected. Please run\n" 1662 "reiserfsck --rebuild-tree and wait for a " 1663 "completion. If that fails\n" 1664 "get newer reiserfsprogs package"); 1665 return 1; 1666 } 1667 1668 SB_BUFFER_WITH_SB(s) = bh; 1669 SB_DISK_SUPER_BLOCK(s) = rs; 1670 1671 /* 1672 * magic is of non-standard journal filesystem, look at s_version to 1673 * find which format is in use 1674 */ 1675 if (is_reiserfs_jr(rs)) { 1676 if (sb_version(rs) == REISERFS_VERSION_2) 1677 reiserfs_info(s, "found reiserfs format \"3.6\"" 1678 " with non-standard journal\n"); 1679 else if (sb_version(rs) == REISERFS_VERSION_1) 1680 reiserfs_info(s, "found reiserfs format \"3.5\"" 1681 " with non-standard journal\n"); 1682 else { 1683 reiserfs_warning(s, "sh-2012", "found unknown " 1684 "format \"%u\" of reiserfs with " 1685 "non-standard magic", sb_version(rs)); 1686 return 1; 1687 } 1688 } else 1689 /* 1690 * s_version of standard format may contain incorrect 1691 * information, so we just look at the magic string 1692 */ 1693 reiserfs_info(s, 1694 "found reiserfs format \"%s\" with standard journal\n", 1695 is_reiserfs_3_5(rs) ? "3.5" : "3.6"); 1696 1697 s->s_op = &reiserfs_sops; 1698 s->s_export_op = &reiserfs_export_ops; 1699 #ifdef CONFIG_QUOTA 1700 s->s_qcop = &reiserfs_qctl_operations; 1701 s->dq_op = &reiserfs_quota_operations; 1702 s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 1703 #endif 1704 1705 /* 1706 * new format is limited by the 32 bit wide i_blocks field, want to 1707 * be one full block below that. 1708 */ 1709 s->s_maxbytes = (512LL << 32) - s->s_blocksize; 1710 return 0; 1711 } 1712 1713 /* after journal replay, reread all bitmap and super blocks */ 1714 static int reread_meta_blocks(struct super_block *s) 1715 { 1716 ll_rw_block(REQ_OP_READ, 0, 1, &SB_BUFFER_WITH_SB(s)); 1717 wait_on_buffer(SB_BUFFER_WITH_SB(s)); 1718 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) { 1719 reiserfs_warning(s, "reiserfs-2504", "error reading the super"); 1720 return 1; 1721 } 1722 1723 return 0; 1724 } 1725 1726 /* hash detection stuff */ 1727 1728 /* 1729 * if root directory is empty - we set default - Yura's - hash and 1730 * warn about it 1731 * FIXME: we look for only one name in a directory. If tea and yura 1732 * both have the same value - we ask user to send report to the 1733 * mailing list 1734 */ 1735 static __u32 find_hash_out(struct super_block *s) 1736 { 1737 int retval; 1738 struct inode *inode; 1739 struct cpu_key key; 1740 INITIALIZE_PATH(path); 1741 struct reiserfs_dir_entry de; 1742 struct reiserfs_de_head *deh; 1743 __u32 hash = DEFAULT_HASH; 1744 __u32 deh_hashval, teahash, r5hash, yurahash; 1745 1746 inode = d_inode(s->s_root); 1747 1748 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3); 1749 retval = search_by_entry_key(s, &key, &path, &de); 1750 if (retval == IO_ERROR) { 1751 pathrelse(&path); 1752 return UNSET_HASH; 1753 } 1754 if (retval == NAME_NOT_FOUND) 1755 de.de_entry_num--; 1756 1757 set_de_name_and_namelen(&de); 1758 deh = de.de_deh + de.de_entry_num; 1759 1760 if (deh_offset(deh) == DOT_DOT_OFFSET) { 1761 /* allow override in this case */ 1762 if (reiserfs_rupasov_hash(s)) 1763 hash = YURA_HASH; 1764 reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n"); 1765 goto out; 1766 } 1767 1768 deh_hashval = GET_HASH_VALUE(deh_offset(deh)); 1769 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen)); 1770 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen)); 1771 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen)); 1772 1773 if ((teahash == r5hash && deh_hashval == r5hash) || 1774 (teahash == yurahash && deh_hashval == yurahash) || 1775 (r5hash == yurahash && deh_hashval == yurahash)) { 1776 reiserfs_warning(s, "reiserfs-2506", 1777 "Unable to automatically detect hash " 1778 "function. Please mount with -o " 1779 "hash={tea,rupasov,r5}"); 1780 hash = UNSET_HASH; 1781 goto out; 1782 } 1783 1784 if (deh_hashval == yurahash) 1785 hash = YURA_HASH; 1786 else if (deh_hashval == teahash) 1787 hash = TEA_HASH; 1788 else if (deh_hashval == r5hash) 1789 hash = R5_HASH; 1790 else { 1791 reiserfs_warning(s, "reiserfs-2506", 1792 "Unrecognised hash function"); 1793 hash = UNSET_HASH; 1794 } 1795 out: 1796 pathrelse(&path); 1797 return hash; 1798 } 1799 1800 /* finds out which hash names are sorted with */ 1801 static int what_hash(struct super_block *s) 1802 { 1803 __u32 code; 1804 1805 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); 1806 1807 /* 1808 * reiserfs_hash_detect() == true if any of the hash mount options 1809 * were used. We must check them to make sure the user isn't 1810 * using a bad hash value 1811 */ 1812 if (code == UNSET_HASH || reiserfs_hash_detect(s)) 1813 code = find_hash_out(s); 1814 1815 if (code != UNSET_HASH && reiserfs_hash_detect(s)) { 1816 /* 1817 * detection has found the hash, and we must check against the 1818 * mount options 1819 */ 1820 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { 1821 reiserfs_warning(s, "reiserfs-2507", 1822 "Error, %s hash detected, " 1823 "unable to force rupasov hash", 1824 reiserfs_hashname(code)); 1825 code = UNSET_HASH; 1826 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { 1827 reiserfs_warning(s, "reiserfs-2508", 1828 "Error, %s hash detected, " 1829 "unable to force tea hash", 1830 reiserfs_hashname(code)); 1831 code = UNSET_HASH; 1832 } else if (reiserfs_r5_hash(s) && code != R5_HASH) { 1833 reiserfs_warning(s, "reiserfs-2509", 1834 "Error, %s hash detected, " 1835 "unable to force r5 hash", 1836 reiserfs_hashname(code)); 1837 code = UNSET_HASH; 1838 } 1839 } else { 1840 /* 1841 * find_hash_out was not called or 1842 * could not determine the hash 1843 */ 1844 if (reiserfs_rupasov_hash(s)) { 1845 code = YURA_HASH; 1846 } else if (reiserfs_tea_hash(s)) { 1847 code = TEA_HASH; 1848 } else if (reiserfs_r5_hash(s)) { 1849 code = R5_HASH; 1850 } 1851 } 1852 1853 /* 1854 * if we are mounted RW, and we have a new valid hash code, update 1855 * the super 1856 */ 1857 if (code != UNSET_HASH && 1858 !sb_rdonly(s) && 1859 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { 1860 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); 1861 } 1862 return code; 1863 } 1864 1865 /* return pointer to appropriate function */ 1866 static hashf_t hash_function(struct super_block *s) 1867 { 1868 switch (what_hash(s)) { 1869 case TEA_HASH: 1870 reiserfs_info(s, "Using tea hash to sort names\n"); 1871 return keyed_hash; 1872 case YURA_HASH: 1873 reiserfs_info(s, "Using rupasov hash to sort names\n"); 1874 return yura_hash; 1875 case R5_HASH: 1876 reiserfs_info(s, "Using r5 hash to sort names\n"); 1877 return r5_hash; 1878 } 1879 return NULL; 1880 } 1881 1882 /* this is used to set up correct value for old partitions */ 1883 static int function2code(hashf_t func) 1884 { 1885 if (func == keyed_hash) 1886 return TEA_HASH; 1887 if (func == yura_hash) 1888 return YURA_HASH; 1889 if (func == r5_hash) 1890 return R5_HASH; 1891 1892 BUG(); /* should never happen */ 1893 1894 return 0; 1895 } 1896 1897 #define SWARN(silent, s, id, ...) \ 1898 if (!(silent)) \ 1899 reiserfs_warning(s, id, __VA_ARGS__) 1900 1901 static int reiserfs_fill_super(struct super_block *s, void *data, int silent) 1902 { 1903 struct inode *root_inode; 1904 struct reiserfs_transaction_handle th; 1905 int old_format = 0; 1906 unsigned long blocks; 1907 unsigned int commit_max_age = 0; 1908 int jinit_done = 0; 1909 struct reiserfs_iget_args args; 1910 struct reiserfs_super_block *rs; 1911 char *jdev_name; 1912 struct reiserfs_sb_info *sbi; 1913 int errval = -EINVAL; 1914 char *qf_names[REISERFS_MAXQUOTAS] = {}; 1915 unsigned int qfmt = 0; 1916 1917 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); 1918 if (!sbi) 1919 return -ENOMEM; 1920 s->s_fs_info = sbi; 1921 /* Set default values for options: non-aggressive tails, RO on errors */ 1922 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL); 1923 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO); 1924 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH); 1925 /* no preallocation minimum, be smart in reiserfs_file_write instead */ 1926 sbi->s_alloc_options.preallocmin = 0; 1927 /* Preallocate by 16 blocks (17-1) at once */ 1928 sbi->s_alloc_options.preallocsize = 17; 1929 /* setup default block allocator options */ 1930 reiserfs_init_alloc_options(s); 1931 1932 spin_lock_init(&sbi->old_work_lock); 1933 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits); 1934 mutex_init(&sbi->lock); 1935 sbi->lock_depth = -1; 1936 1937 sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0, 1938 s->s_id); 1939 if (!sbi->commit_wq) { 1940 SWARN(silent, s, "", "Cannot allocate commit workqueue"); 1941 errval = -ENOMEM; 1942 goto error_unlocked; 1943 } 1944 1945 jdev_name = NULL; 1946 if (reiserfs_parse_options 1947 (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name, 1948 &commit_max_age, qf_names, &qfmt) == 0) { 1949 goto error_unlocked; 1950 } 1951 if (jdev_name && jdev_name[0]) { 1952 sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL); 1953 if (!sbi->s_jdev) { 1954 SWARN(silent, s, "", "Cannot allocate memory for " 1955 "journal device name"); 1956 goto error; 1957 } 1958 } 1959 #ifdef CONFIG_QUOTA 1960 handle_quota_files(s, qf_names, &qfmt); 1961 #endif 1962 1963 if (blocks) { 1964 SWARN(silent, s, "jmacd-7", "resize option for remount only"); 1965 goto error_unlocked; 1966 } 1967 1968 /* 1969 * try old format (undistributed bitmap, super block in 8-th 1k 1970 * block of a device) 1971 */ 1972 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) 1973 old_format = 1; 1974 1975 /* 1976 * try new format (64-th 1k block), which can contain reiserfs 1977 * super block 1978 */ 1979 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) { 1980 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s", 1981 s->s_id); 1982 goto error_unlocked; 1983 } 1984 1985 rs = SB_DISK_SUPER_BLOCK(s); 1986 /* 1987 * Let's do basic sanity check to verify that underlying device is not 1988 * smaller than the filesystem. If the check fails then abort and 1989 * scream, because bad stuff will happen otherwise. 1990 */ 1991 if (s->s_bdev && s->s_bdev->bd_inode 1992 && i_size_read(s->s_bdev->bd_inode) < 1993 sb_block_count(rs) * sb_blocksize(rs)) { 1994 SWARN(silent, s, "", "Filesystem cannot be " 1995 "mounted because it is bigger than the device"); 1996 SWARN(silent, s, "", "You may need to run fsck " 1997 "or increase size of your LVM partition"); 1998 SWARN(silent, s, "", "Or may be you forgot to " 1999 "reboot after fdisk when it told you to"); 2000 goto error_unlocked; 2001 } 2002 2003 sbi->s_mount_state = SB_REISERFS_STATE(s); 2004 sbi->s_mount_state = REISERFS_VALID_FS; 2005 2006 if ((errval = reiserfs_init_bitmap_cache(s))) { 2007 SWARN(silent, s, "jmacd-8", "unable to read bitmap"); 2008 goto error_unlocked; 2009 } 2010 2011 errval = -EINVAL; 2012 #ifdef CONFIG_REISERFS_CHECK 2013 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON"); 2014 SWARN(silent, s, "", "- it is slow mode for debugging."); 2015 #endif 2016 2017 /* make data=ordered the default */ 2018 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && 2019 !reiserfs_data_writeback(s)) { 2020 sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); 2021 } 2022 2023 if (reiserfs_data_log(s)) { 2024 reiserfs_info(s, "using journaled data mode\n"); 2025 } else if (reiserfs_data_ordered(s)) { 2026 reiserfs_info(s, "using ordered data mode\n"); 2027 } else { 2028 reiserfs_info(s, "using writeback data mode\n"); 2029 } 2030 if (reiserfs_barrier_flush(s)) { 2031 printk("reiserfs: using flush barriers\n"); 2032 } 2033 2034 if (journal_init(s, jdev_name, old_format, commit_max_age)) { 2035 SWARN(silent, s, "sh-2022", 2036 "unable to initialize journal space"); 2037 goto error_unlocked; 2038 } else { 2039 /* 2040 * once this is set, journal_release must be called 2041 * if we error out of the mount 2042 */ 2043 jinit_done = 1; 2044 } 2045 2046 if (reread_meta_blocks(s)) { 2047 SWARN(silent, s, "jmacd-9", 2048 "unable to reread meta blocks after journal init"); 2049 goto error_unlocked; 2050 } 2051 2052 if (replay_only(s)) 2053 goto error_unlocked; 2054 2055 if (bdev_read_only(s->s_bdev) && !sb_rdonly(s)) { 2056 SWARN(silent, s, "clm-7000", 2057 "Detected readonly device, marking FS readonly"); 2058 s->s_flags |= SB_RDONLY; 2059 } 2060 args.objectid = REISERFS_ROOT_OBJECTID; 2061 args.dirid = REISERFS_ROOT_PARENT_OBJECTID; 2062 root_inode = 2063 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, 2064 reiserfs_init_locked_inode, (void *)&args); 2065 if (!root_inode) { 2066 SWARN(silent, s, "jmacd-10", "get root inode failed"); 2067 goto error_unlocked; 2068 } 2069 2070 /* 2071 * This path assumed to be called with the BKL in the old times. 2072 * Now we have inherited the big reiserfs lock from it and many 2073 * reiserfs helpers called in the mount path and elsewhere require 2074 * this lock to be held even if it's not always necessary. Let's be 2075 * conservative and hold it early. The window can be reduced after 2076 * careful review of the code. 2077 */ 2078 reiserfs_write_lock(s); 2079 2080 if (root_inode->i_state & I_NEW) { 2081 reiserfs_read_locked_inode(root_inode, &args); 2082 unlock_new_inode(root_inode); 2083 } 2084 2085 s->s_root = d_make_root(root_inode); 2086 if (!s->s_root) 2087 goto error; 2088 /* define and initialize hash function */ 2089 sbi->s_hash_function = hash_function(s); 2090 if (sbi->s_hash_function == NULL) { 2091 dput(s->s_root); 2092 s->s_root = NULL; 2093 goto error; 2094 } 2095 2096 if (is_reiserfs_3_5(rs) 2097 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) 2098 set_bit(REISERFS_3_5, &sbi->s_properties); 2099 else if (old_format) 2100 set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties); 2101 else 2102 set_bit(REISERFS_3_6, &sbi->s_properties); 2103 2104 if (!sb_rdonly(s)) { 2105 2106 errval = journal_begin(&th, s, 1); 2107 if (errval) { 2108 dput(s->s_root); 2109 s->s_root = NULL; 2110 goto error; 2111 } 2112 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); 2113 2114 set_sb_umount_state(rs, REISERFS_ERROR_FS); 2115 set_sb_fs_state(rs, 0); 2116 2117 /* 2118 * Clear out s_bmap_nr if it would wrap. We can handle this 2119 * case, but older revisions can't. This will cause the 2120 * file system to fail mount on those older implementations, 2121 * avoiding corruption. -jeffm 2122 */ 2123 if (bmap_would_wrap(reiserfs_bmap_count(s)) && 2124 sb_bmap_nr(rs) != 0) { 2125 reiserfs_warning(s, "super-2030", "This file system " 2126 "claims to use %u bitmap blocks in " 2127 "its super block, but requires %u. " 2128 "Clearing to zero.", sb_bmap_nr(rs), 2129 reiserfs_bmap_count(s)); 2130 2131 set_sb_bmap_nr(rs, 0); 2132 } 2133 2134 if (old_format_only(s)) { 2135 /* 2136 * filesystem of format 3.5 either with standard 2137 * or non-standard journal 2138 */ 2139 if (convert_reiserfs(s)) { 2140 /* and -o conv is given */ 2141 if (!silent) 2142 reiserfs_info(s, 2143 "converting 3.5 filesystem to the 3.6 format"); 2144 2145 if (is_reiserfs_3_5(rs)) 2146 /* 2147 * put magic string of 3.6 format. 2148 * 2.2 will not be able to 2149 * mount this filesystem anymore 2150 */ 2151 memcpy(rs->s_v1.s_magic, 2152 reiserfs_3_6_magic_string, 2153 sizeof 2154 (reiserfs_3_6_magic_string)); 2155 2156 set_sb_version(rs, REISERFS_VERSION_2); 2157 reiserfs_convert_objectid_map_v1(s); 2158 set_bit(REISERFS_3_6, &sbi->s_properties); 2159 clear_bit(REISERFS_3_5, &sbi->s_properties); 2160 } else if (!silent) { 2161 reiserfs_info(s, "using 3.5.x disk format\n"); 2162 } 2163 } else 2164 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); 2165 2166 2167 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); 2168 errval = journal_end(&th); 2169 if (errval) { 2170 dput(s->s_root); 2171 s->s_root = NULL; 2172 goto error; 2173 } 2174 2175 reiserfs_write_unlock(s); 2176 if ((errval = reiserfs_lookup_privroot(s)) || 2177 (errval = reiserfs_xattr_init(s, s->s_flags))) { 2178 dput(s->s_root); 2179 s->s_root = NULL; 2180 goto error_unlocked; 2181 } 2182 reiserfs_write_lock(s); 2183 2184 /* 2185 * look for files which were to be removed in previous session 2186 */ 2187 finish_unfinished(s); 2188 } else { 2189 if (old_format_only(s) && !silent) { 2190 reiserfs_info(s, "using 3.5.x disk format\n"); 2191 } 2192 2193 reiserfs_write_unlock(s); 2194 if ((errval = reiserfs_lookup_privroot(s)) || 2195 (errval = reiserfs_xattr_init(s, s->s_flags))) { 2196 dput(s->s_root); 2197 s->s_root = NULL; 2198 goto error_unlocked; 2199 } 2200 reiserfs_write_lock(s); 2201 } 2202 /* 2203 * mark hash in super block: it could be unset. overwrite should be ok 2204 */ 2205 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); 2206 2207 handle_attrs(s); 2208 2209 reiserfs_proc_info_init(s); 2210 2211 init_waitqueue_head(&(sbi->s_wait)); 2212 spin_lock_init(&sbi->bitmap_lock); 2213 2214 reiserfs_write_unlock(s); 2215 2216 return (0); 2217 2218 error: 2219 reiserfs_write_unlock(s); 2220 2221 error_unlocked: 2222 /* kill the commit thread, free journal ram */ 2223 if (jinit_done) { 2224 reiserfs_write_lock(s); 2225 journal_release_error(NULL, s); 2226 reiserfs_write_unlock(s); 2227 } 2228 2229 if (sbi->commit_wq) 2230 destroy_workqueue(sbi->commit_wq); 2231 2232 reiserfs_cancel_old_flush(s); 2233 2234 reiserfs_free_bitmap_cache(s); 2235 if (SB_BUFFER_WITH_SB(s)) 2236 brelse(SB_BUFFER_WITH_SB(s)); 2237 #ifdef CONFIG_QUOTA 2238 { 2239 int j; 2240 for (j = 0; j < REISERFS_MAXQUOTAS; j++) 2241 kfree(qf_names[j]); 2242 } 2243 #endif 2244 kfree(sbi); 2245 2246 s->s_fs_info = NULL; 2247 return errval; 2248 } 2249 2250 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) 2251 { 2252 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb); 2253 2254 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize)); 2255 buf->f_bfree = sb_free_blocks(rs); 2256 buf->f_bavail = buf->f_bfree; 2257 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; 2258 buf->f_bsize = dentry->d_sb->s_blocksize; 2259 /* changed to accommodate gcc folks. */ 2260 buf->f_type = REISERFS_SUPER_MAGIC; 2261 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2); 2262 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2, 2263 sizeof(rs->s_uuid)/2); 2264 2265 return 0; 2266 } 2267 2268 #ifdef CONFIG_QUOTA 2269 static int reiserfs_write_dquot(struct dquot *dquot) 2270 { 2271 struct reiserfs_transaction_handle th; 2272 int ret, err; 2273 int depth; 2274 2275 reiserfs_write_lock(dquot->dq_sb); 2276 ret = 2277 journal_begin(&th, dquot->dq_sb, 2278 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 2279 if (ret) 2280 goto out; 2281 depth = reiserfs_write_unlock_nested(dquot->dq_sb); 2282 ret = dquot_commit(dquot); 2283 reiserfs_write_lock_nested(dquot->dq_sb, depth); 2284 err = journal_end(&th); 2285 if (!ret && err) 2286 ret = err; 2287 out: 2288 reiserfs_write_unlock(dquot->dq_sb); 2289 return ret; 2290 } 2291 2292 static int reiserfs_acquire_dquot(struct dquot *dquot) 2293 { 2294 struct reiserfs_transaction_handle th; 2295 int ret, err; 2296 int depth; 2297 2298 reiserfs_write_lock(dquot->dq_sb); 2299 ret = 2300 journal_begin(&th, dquot->dq_sb, 2301 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 2302 if (ret) 2303 goto out; 2304 depth = reiserfs_write_unlock_nested(dquot->dq_sb); 2305 ret = dquot_acquire(dquot); 2306 reiserfs_write_lock_nested(dquot->dq_sb, depth); 2307 err = journal_end(&th); 2308 if (!ret && err) 2309 ret = err; 2310 out: 2311 reiserfs_write_unlock(dquot->dq_sb); 2312 return ret; 2313 } 2314 2315 static int reiserfs_release_dquot(struct dquot *dquot) 2316 { 2317 struct reiserfs_transaction_handle th; 2318 int ret, err; 2319 2320 reiserfs_write_lock(dquot->dq_sb); 2321 ret = 2322 journal_begin(&th, dquot->dq_sb, 2323 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 2324 reiserfs_write_unlock(dquot->dq_sb); 2325 if (ret) { 2326 /* Release dquot anyway to avoid endless cycle in dqput() */ 2327 dquot_release(dquot); 2328 goto out; 2329 } 2330 ret = dquot_release(dquot); 2331 reiserfs_write_lock(dquot->dq_sb); 2332 err = journal_end(&th); 2333 if (!ret && err) 2334 ret = err; 2335 reiserfs_write_unlock(dquot->dq_sb); 2336 out: 2337 return ret; 2338 } 2339 2340 static int reiserfs_mark_dquot_dirty(struct dquot *dquot) 2341 { 2342 /* Are we journaling quotas? */ 2343 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 2344 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 2345 dquot_mark_dquot_dirty(dquot); 2346 return reiserfs_write_dquot(dquot); 2347 } else 2348 return dquot_mark_dquot_dirty(dquot); 2349 } 2350 2351 static int reiserfs_write_info(struct super_block *sb, int type) 2352 { 2353 struct reiserfs_transaction_handle th; 2354 int ret, err; 2355 int depth; 2356 2357 /* Data block + inode block */ 2358 reiserfs_write_lock(sb); 2359 ret = journal_begin(&th, sb, 2); 2360 if (ret) 2361 goto out; 2362 depth = reiserfs_write_unlock_nested(sb); 2363 ret = dquot_commit_info(sb, type); 2364 reiserfs_write_lock_nested(sb, depth); 2365 err = journal_end(&th); 2366 if (!ret && err) 2367 ret = err; 2368 out: 2369 reiserfs_write_unlock(sb); 2370 return ret; 2371 } 2372 2373 /* 2374 * Turn on quotas during mount time - we need to find the quota file and such... 2375 */ 2376 static int reiserfs_quota_on_mount(struct super_block *sb, int type) 2377 { 2378 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type], 2379 REISERFS_SB(sb)->s_jquota_fmt, type); 2380 } 2381 2382 /* 2383 * Standard function to be called on quota_on 2384 */ 2385 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, 2386 const struct path *path) 2387 { 2388 int err; 2389 struct inode *inode; 2390 struct reiserfs_transaction_handle th; 2391 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA; 2392 2393 reiserfs_write_lock(sb); 2394 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) { 2395 err = -EINVAL; 2396 goto out; 2397 } 2398 2399 /* Quotafile not on the same filesystem? */ 2400 if (path->dentry->d_sb != sb) { 2401 err = -EXDEV; 2402 goto out; 2403 } 2404 inode = d_inode(path->dentry); 2405 /* 2406 * We must not pack tails for quota files on reiserfs for quota 2407 * IO to work 2408 */ 2409 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) { 2410 err = reiserfs_unpack(inode, NULL); 2411 if (err) { 2412 reiserfs_warning(sb, "super-6520", 2413 "Unpacking tail of quota file failed" 2414 " (%d). Cannot turn on quotas.", err); 2415 err = -EINVAL; 2416 goto out; 2417 } 2418 mark_inode_dirty(inode); 2419 } 2420 /* Journaling quota? */ 2421 if (REISERFS_SB(sb)->s_qf_names[type]) { 2422 /* Quotafile not of fs root? */ 2423 if (path->dentry->d_parent != sb->s_root) 2424 reiserfs_warning(sb, "super-6521", 2425 "Quota file not on filesystem root. " 2426 "Journalled quota will not work."); 2427 } 2428 2429 /* 2430 * When we journal data on quota file, we have to flush journal to see 2431 * all updates to the file when we bypass pagecache... 2432 */ 2433 if (reiserfs_file_data_log(inode)) { 2434 /* Just start temporary transaction and finish it */ 2435 err = journal_begin(&th, sb, 1); 2436 if (err) 2437 goto out; 2438 err = journal_end_sync(&th); 2439 if (err) 2440 goto out; 2441 } 2442 reiserfs_write_unlock(sb); 2443 err = dquot_quota_on(sb, type, format_id, path); 2444 if (!err) { 2445 inode_lock(inode); 2446 REISERFS_I(inode)->i_attrs |= REISERFS_IMMUTABLE_FL | 2447 REISERFS_NOATIME_FL; 2448 inode_set_flags(inode, S_IMMUTABLE | S_NOATIME, 2449 S_IMMUTABLE | S_NOATIME); 2450 inode_unlock(inode); 2451 mark_inode_dirty(inode); 2452 } 2453 return err; 2454 out: 2455 reiserfs_write_unlock(sb); 2456 return err; 2457 } 2458 2459 static int reiserfs_quota_off(struct super_block *sb, int type) 2460 { 2461 int err; 2462 struct inode *inode = sb_dqopt(sb)->files[type]; 2463 2464 if (!inode || !igrab(inode)) 2465 goto out; 2466 2467 err = dquot_quota_off(sb, type); 2468 if (err) 2469 goto out_put; 2470 2471 inode_lock(inode); 2472 REISERFS_I(inode)->i_attrs &= ~(REISERFS_IMMUTABLE_FL | 2473 REISERFS_NOATIME_FL); 2474 inode_set_flags(inode, 0, S_IMMUTABLE | S_NOATIME); 2475 inode_unlock(inode); 2476 mark_inode_dirty(inode); 2477 out_put: 2478 iput(inode); 2479 return err; 2480 out: 2481 return dquot_quota_off(sb, type); 2482 } 2483 2484 /* 2485 * Read data from quotafile - avoid pagecache and such because we cannot afford 2486 * acquiring the locks... As quota files are never truncated and quota code 2487 * itself serializes the operations (and no one else should touch the files) 2488 * we don't have to be afraid of races 2489 */ 2490 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, 2491 size_t len, loff_t off) 2492 { 2493 struct inode *inode = sb_dqopt(sb)->files[type]; 2494 unsigned long blk = off >> sb->s_blocksize_bits; 2495 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; 2496 size_t toread; 2497 struct buffer_head tmp_bh, *bh; 2498 loff_t i_size = i_size_read(inode); 2499 2500 if (off > i_size) 2501 return 0; 2502 if (off + len > i_size) 2503 len = i_size - off; 2504 toread = len; 2505 while (toread > 0) { 2506 tocopy = 2507 sb->s_blocksize - offset < 2508 toread ? sb->s_blocksize - offset : toread; 2509 tmp_bh.b_state = 0; 2510 /* 2511 * Quota files are without tails so we can safely 2512 * use this function 2513 */ 2514 reiserfs_write_lock(sb); 2515 err = reiserfs_get_block(inode, blk, &tmp_bh, 0); 2516 reiserfs_write_unlock(sb); 2517 if (err) 2518 return err; 2519 if (!buffer_mapped(&tmp_bh)) /* A hole? */ 2520 memset(data, 0, tocopy); 2521 else { 2522 bh = sb_bread(sb, tmp_bh.b_blocknr); 2523 if (!bh) 2524 return -EIO; 2525 memcpy(data, bh->b_data + offset, tocopy); 2526 brelse(bh); 2527 } 2528 offset = 0; 2529 toread -= tocopy; 2530 data += tocopy; 2531 blk++; 2532 } 2533 return len; 2534 } 2535 2536 /* 2537 * Write to quotafile (we know the transaction is already started and has 2538 * enough credits) 2539 */ 2540 static ssize_t reiserfs_quota_write(struct super_block *sb, int type, 2541 const char *data, size_t len, loff_t off) 2542 { 2543 struct inode *inode = sb_dqopt(sb)->files[type]; 2544 unsigned long blk = off >> sb->s_blocksize_bits; 2545 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; 2546 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; 2547 size_t towrite = len; 2548 struct buffer_head tmp_bh, *bh; 2549 2550 if (!current->journal_info) { 2551 printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n", 2552 (unsigned long long)off, (unsigned long long)len); 2553 return -EIO; 2554 } 2555 while (towrite > 0) { 2556 tocopy = sb->s_blocksize - offset < towrite ? 2557 sb->s_blocksize - offset : towrite; 2558 tmp_bh.b_state = 0; 2559 reiserfs_write_lock(sb); 2560 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); 2561 reiserfs_write_unlock(sb); 2562 if (err) 2563 goto out; 2564 if (offset || tocopy != sb->s_blocksize) 2565 bh = sb_bread(sb, tmp_bh.b_blocknr); 2566 else 2567 bh = sb_getblk(sb, tmp_bh.b_blocknr); 2568 if (!bh) { 2569 err = -EIO; 2570 goto out; 2571 } 2572 lock_buffer(bh); 2573 memcpy(bh->b_data + offset, data, tocopy); 2574 flush_dcache_page(bh->b_page); 2575 set_buffer_uptodate(bh); 2576 unlock_buffer(bh); 2577 reiserfs_write_lock(sb); 2578 reiserfs_prepare_for_journal(sb, bh, 1); 2579 journal_mark_dirty(current->journal_info, bh); 2580 if (!journal_quota) 2581 reiserfs_add_ordered_list(inode, bh); 2582 reiserfs_write_unlock(sb); 2583 brelse(bh); 2584 offset = 0; 2585 towrite -= tocopy; 2586 data += tocopy; 2587 blk++; 2588 } 2589 out: 2590 if (len == towrite) 2591 return err; 2592 if (inode->i_size < off + len - towrite) 2593 i_size_write(inode, off + len - towrite); 2594 inode->i_mtime = inode->i_ctime = current_time(inode); 2595 mark_inode_dirty(inode); 2596 return len - towrite; 2597 } 2598 2599 #endif 2600 2601 static struct dentry *get_super_block(struct file_system_type *fs_type, 2602 int flags, const char *dev_name, 2603 void *data) 2604 { 2605 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super); 2606 } 2607 2608 static int __init init_reiserfs_fs(void) 2609 { 2610 int ret; 2611 2612 ret = init_inodecache(); 2613 if (ret) 2614 return ret; 2615 2616 reiserfs_proc_info_global_init(); 2617 2618 ret = register_filesystem(&reiserfs_fs_type); 2619 if (ret) 2620 goto out; 2621 2622 return 0; 2623 out: 2624 reiserfs_proc_info_global_done(); 2625 destroy_inodecache(); 2626 2627 return ret; 2628 } 2629 2630 static void __exit exit_reiserfs_fs(void) 2631 { 2632 reiserfs_proc_info_global_done(); 2633 unregister_filesystem(&reiserfs_fs_type); 2634 destroy_inodecache(); 2635 } 2636 2637 struct file_system_type reiserfs_fs_type = { 2638 .owner = THIS_MODULE, 2639 .name = "reiserfs", 2640 .mount = get_super_block, 2641 .kill_sb = reiserfs_kill_sb, 2642 .fs_flags = FS_REQUIRES_DEV, 2643 }; 2644 MODULE_ALIAS_FS("reiserfs"); 2645 2646 MODULE_DESCRIPTION("ReiserFS journaled filesystem"); 2647 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>"); 2648 MODULE_LICENSE("GPL"); 2649 2650 module_init(init_reiserfs_fs); 2651 module_exit(exit_reiserfs_fs); 2652