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 34struct file_system_type reiserfs_fs_type; 35 36static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING; 37static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING; 38static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING; 39 40int 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 46int 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 52int 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 58static 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 64static int reiserfs_remount(struct super_block *s, int *flags, char *data); 65static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf); 66 67static 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 84static 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 115void 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 136void 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 147static 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 170static 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 182extern 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 */ 193static 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 213static 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 */ 225static 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 */ 429void 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 */ 510int 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 550static 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 574static int reiserfs_quota_off(struct super_block *sb, int type); 575 576static 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 584static inline void reiserfs_quota_off_umount(struct super_block *s) 585{ 586} 587#endif 588 589static 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 637static struct kmem_cache *reiserfs_inode_cachep; 638 639static 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 654static void reiserfs_free_inode(struct inode *inode) 655{ 656 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); 657} 658 659static 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 667static 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_ACCOUNT), 674 init_once); 675 if (reiserfs_inode_cachep == NULL) 676 return -ENOMEM; 677 return 0; 678} 679 680static void destroy_inodecache(void) 681{ 682 /* 683 * Make sure all delayed rcu free inodes are flushed before we 684 * destroy cache. 685 */ 686 rcu_barrier(); 687 kmem_cache_destroy(reiserfs_inode_cachep); 688} 689 690/* we don't mark inodes dirty, we just log them */ 691static void reiserfs_dirty_inode(struct inode *inode, int flags) 692{ 693 struct reiserfs_transaction_handle th; 694 695 int err = 0; 696 697 if (sb_rdonly(inode->i_sb)) { 698 reiserfs_warning(inode->i_sb, "clm-6006", 699 "writing inode %lu on readonly FS", 700 inode->i_ino); 701 return; 702 } 703 reiserfs_write_lock(inode->i_sb); 704 705 /* 706 * this is really only used for atime updates, so they don't have 707 * to be included in O_SYNC or fsync 708 */ 709 err = journal_begin(&th, inode->i_sb, 1); 710 if (err) 711 goto out; 712 713 reiserfs_update_sd(&th, inode); 714 journal_end(&th); 715 716out: 717 reiserfs_write_unlock(inode->i_sb); 718} 719 720static int reiserfs_show_options(struct seq_file *seq, struct dentry *root) 721{ 722 struct super_block *s = root->d_sb; 723 struct reiserfs_journal *journal = SB_JOURNAL(s); 724 long opts = REISERFS_SB(s)->s_mount_opt; 725 726 if (opts & (1 << REISERFS_LARGETAIL)) 727 seq_puts(seq, ",tails=on"); 728 else if (!(opts & (1 << REISERFS_SMALLTAIL))) 729 seq_puts(seq, ",notail"); 730 /* tails=small is default so we don't show it */ 731 732 if (!(opts & (1 << REISERFS_BARRIER_FLUSH))) 733 seq_puts(seq, ",barrier=none"); 734 /* barrier=flush is default so we don't show it */ 735 736 if (opts & (1 << REISERFS_ERROR_CONTINUE)) 737 seq_puts(seq, ",errors=continue"); 738 else if (opts & (1 << REISERFS_ERROR_PANIC)) 739 seq_puts(seq, ",errors=panic"); 740 /* errors=ro is default so we don't show it */ 741 742 if (opts & (1 << REISERFS_DATA_LOG)) 743 seq_puts(seq, ",data=journal"); 744 else if (opts & (1 << REISERFS_DATA_WRITEBACK)) 745 seq_puts(seq, ",data=writeback"); 746 /* data=ordered is default so we don't show it */ 747 748 if (opts & (1 << REISERFS_ATTRS)) 749 seq_puts(seq, ",attrs"); 750 751 if (opts & (1 << REISERFS_XATTRS_USER)) 752 seq_puts(seq, ",user_xattr"); 753 754 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT)) 755 seq_puts(seq, ",expose_privroot"); 756 757 if (opts & (1 << REISERFS_POSIXACL)) 758 seq_puts(seq, ",acl"); 759 760 if (REISERFS_SB(s)->s_jdev) 761 seq_show_option(seq, "jdev", REISERFS_SB(s)->s_jdev); 762 763 if (journal->j_max_commit_age != journal->j_default_max_commit_age) 764 seq_printf(seq, ",commit=%d", journal->j_max_commit_age); 765 766#ifdef CONFIG_QUOTA 767 if (REISERFS_SB(s)->s_qf_names[USRQUOTA]) 768 seq_show_option(seq, "usrjquota", 769 REISERFS_SB(s)->s_qf_names[USRQUOTA]); 770 else if (opts & (1 << REISERFS_USRQUOTA)) 771 seq_puts(seq, ",usrquota"); 772 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA]) 773 seq_show_option(seq, "grpjquota", 774 REISERFS_SB(s)->s_qf_names[GRPQUOTA]); 775 else if (opts & (1 << REISERFS_GRPQUOTA)) 776 seq_puts(seq, ",grpquota"); 777 if (REISERFS_SB(s)->s_jquota_fmt) { 778 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD) 779 seq_puts(seq, ",jqfmt=vfsold"); 780 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0) 781 seq_puts(seq, ",jqfmt=vfsv0"); 782 } 783#endif 784 785 /* Block allocator options */ 786 if (opts & (1 << REISERFS_NO_BORDER)) 787 seq_puts(seq, ",block-allocator=noborder"); 788 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION)) 789 seq_puts(seq, ",block-allocator=no_unhashed_relocation"); 790 if (opts & (1 << REISERFS_HASHED_RELOCATION)) 791 seq_puts(seq, ",block-allocator=hashed_relocation"); 792 if (opts & (1 << REISERFS_TEST4)) 793 seq_puts(seq, ",block-allocator=test4"); 794 show_alloc_options(seq, s); 795 return 0; 796} 797 798#ifdef CONFIG_QUOTA 799static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, 800 size_t, loff_t); 801static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, 802 loff_t); 803 804static struct dquot __rcu **reiserfs_get_dquots(struct inode *inode) 805{ 806 return REISERFS_I(inode)->i_dquot; 807} 808#endif 809 810static const struct super_operations reiserfs_sops = { 811 .alloc_inode = reiserfs_alloc_inode, 812 .free_inode = reiserfs_free_inode, 813 .write_inode = reiserfs_write_inode, 814 .dirty_inode = reiserfs_dirty_inode, 815 .evict_inode = reiserfs_evict_inode, 816 .put_super = reiserfs_put_super, 817 .sync_fs = reiserfs_sync_fs, 818 .freeze_fs = reiserfs_freeze, 819 .unfreeze_fs = reiserfs_unfreeze, 820 .statfs = reiserfs_statfs, 821 .remount_fs = reiserfs_remount, 822 .show_options = reiserfs_show_options, 823#ifdef CONFIG_QUOTA 824 .quota_read = reiserfs_quota_read, 825 .quota_write = reiserfs_quota_write, 826 .get_dquots = reiserfs_get_dquots, 827#endif 828}; 829 830#ifdef CONFIG_QUOTA 831#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") 832 833static int reiserfs_write_dquot(struct dquot *); 834static int reiserfs_acquire_dquot(struct dquot *); 835static int reiserfs_release_dquot(struct dquot *); 836static int reiserfs_mark_dquot_dirty(struct dquot *); 837static int reiserfs_write_info(struct super_block *, int); 838static int reiserfs_quota_on(struct super_block *, int, int, const struct path *); 839 840static const struct dquot_operations reiserfs_quota_operations = { 841 .write_dquot = reiserfs_write_dquot, 842 .acquire_dquot = reiserfs_acquire_dquot, 843 .release_dquot = reiserfs_release_dquot, 844 .mark_dirty = reiserfs_mark_dquot_dirty, 845 .write_info = reiserfs_write_info, 846 .alloc_dquot = dquot_alloc, 847 .destroy_dquot = dquot_destroy, 848 .get_next_id = dquot_get_next_id, 849}; 850 851static const struct quotactl_ops reiserfs_qctl_operations = { 852 .quota_on = reiserfs_quota_on, 853 .quota_off = reiserfs_quota_off, 854 .quota_sync = dquot_quota_sync, 855 .get_state = dquot_get_state, 856 .set_info = dquot_set_dqinfo, 857 .get_dqblk = dquot_get_dqblk, 858 .set_dqblk = dquot_set_dqblk, 859}; 860#endif 861 862static const struct export_operations reiserfs_export_ops = { 863 .encode_fh = reiserfs_encode_fh, 864 .fh_to_dentry = reiserfs_fh_to_dentry, 865 .fh_to_parent = reiserfs_fh_to_parent, 866 .get_parent = reiserfs_get_parent, 867}; 868 869/* 870 * this struct is used in reiserfs_getopt () for containing the value for 871 * those mount options that have values rather than being toggles. 872 */ 873typedef struct { 874 char *value; 875 /* 876 * bitmask which is to set on mount_options bitmask 877 * when this value is found, 0 is no bits are to be changed. 878 */ 879 int setmask; 880 /* 881 * bitmask which is to clear on mount_options bitmask 882 * when this value is found, 0 is no bits are to be changed. 883 * This is applied BEFORE setmask 884 */ 885 int clrmask; 886} arg_desc_t; 887 888/* Set this bit in arg_required to allow empty arguments */ 889#define REISERFS_OPT_ALLOWEMPTY 31 890 891/* 892 * this struct is used in reiserfs_getopt() for describing the 893 * set of reiserfs mount options 894 */ 895typedef struct { 896 char *option_name; 897 898 /* 0 if argument is not required, not 0 otherwise */ 899 int arg_required; 900 901 /* list of values accepted by an option */ 902 const arg_desc_t *values; 903 904 /* 905 * bitmask which is to set on mount_options bitmask 906 * when this value is found, 0 is no bits are to be changed. 907 */ 908 int setmask; 909 910 /* 911 * bitmask which is to clear on mount_options bitmask 912 * when this value is found, 0 is no bits are to be changed. 913 * This is applied BEFORE setmask 914 */ 915 int clrmask; 916} opt_desc_t; 917 918/* possible values for -o data= */ 919static const arg_desc_t logging_mode[] = { 920 {"ordered", 1 << REISERFS_DATA_ORDERED, 921 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)}, 922 {"journal", 1 << REISERFS_DATA_LOG, 923 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)}, 924 {"writeback", 1 << REISERFS_DATA_WRITEBACK, 925 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)}, 926 {.value = NULL} 927}; 928 929/* possible values for -o barrier= */ 930static const arg_desc_t barrier_mode[] = { 931 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH}, 932 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE}, 933 {.value = NULL} 934}; 935 936/* 937 * possible values for "-o block-allocator=" and bits which are to be set in 938 * s_mount_opt of reiserfs specific part of in-core super block 939 */ 940static const arg_desc_t balloc[] = { 941 {"noborder", 1 << REISERFS_NO_BORDER, 0}, 942 {"border", 0, 1 << REISERFS_NO_BORDER}, 943 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0}, 944 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0}, 945 {"test4", 1 << REISERFS_TEST4, 0}, 946 {"notest4", 0, 1 << REISERFS_TEST4}, 947 {NULL, 0, 0} 948}; 949 950static const arg_desc_t tails[] = { 951 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL}, 952 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, 953 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL}, 954 {NULL, 0, 0} 955}; 956 957static const arg_desc_t error_actions[] = { 958 {"panic", 1 << REISERFS_ERROR_PANIC, 959 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, 960 {"ro-remount", 1 << REISERFS_ERROR_RO, 961 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, 962#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG 963 {"continue", 1 << REISERFS_ERROR_CONTINUE, 964 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, 965#endif 966 {NULL, 0, 0}, 967}; 968 969/* 970 * proceed only one option from a list *cur - string containing of mount 971 * options 972 * opts - array of options which are accepted 973 * opt_arg - if option is found and requires an argument and if it is specifed 974 * in the input - pointer to the argument is stored here 975 * bit_flags - if option requires to set a certain bit - it is set here 976 * return -1 if unknown option is found, opt->arg_required otherwise 977 */ 978static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts, 979 char **opt_arg, unsigned long *bit_flags) 980{ 981 char *p; 982 /* 983 * foo=bar, 984 * ^ ^ ^ 985 * | | +-- option_end 986 * | +-- arg_start 987 * +-- option_start 988 */ 989 const opt_desc_t *opt; 990 const arg_desc_t *arg; 991 992 p = *cur; 993 994 /* assume argument cannot contain commas */ 995 *cur = strchr(p, ','); 996 if (*cur) { 997 *(*cur) = '\0'; 998 (*cur)++; 999 } 1000 1001 if (!strncmp(p, "alloc=", 6)) { 1002 /* 1003 * Ugly special case, probably we should redo options 1004 * parser so that it can understand several arguments for 1005 * some options, also so that it can fill several bitfields 1006 * with option values. 1007 */ 1008 if (reiserfs_parse_alloc_options(s, p + 6)) { 1009 return -1; 1010 } else { 1011 return 0; 1012 } 1013 } 1014 1015 /* for every option in the list */ 1016 for (opt = opts; opt->option_name; opt++) { 1017 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) { 1018 if (bit_flags) { 1019 if (opt->clrmask == 1020 (1 << REISERFS_UNSUPPORTED_OPT)) 1021 reiserfs_warning(s, "super-6500", 1022 "%s not supported.\n", 1023 p); 1024 else 1025 *bit_flags &= ~opt->clrmask; 1026 if (opt->setmask == 1027 (1 << REISERFS_UNSUPPORTED_OPT)) 1028 reiserfs_warning(s, "super-6501", 1029 "%s not supported.\n", 1030 p); 1031 else 1032 *bit_flags |= opt->setmask; 1033 } 1034 break; 1035 } 1036 } 1037 if (!opt->option_name) { 1038 reiserfs_warning(s, "super-6502", 1039 "unknown mount option \"%s\"", p); 1040 return -1; 1041 } 1042 1043 p += strlen(opt->option_name); 1044 switch (*p) { 1045 case '=': 1046 if (!opt->arg_required) { 1047 reiserfs_warning(s, "super-6503", 1048 "the option \"%s\" does not " 1049 "require an argument\n", 1050 opt->option_name); 1051 return -1; 1052 } 1053 break; 1054 1055 case 0: 1056 if (opt->arg_required) { 1057 reiserfs_warning(s, "super-6504", 1058 "the option \"%s\" requires an " 1059 "argument\n", opt->option_name); 1060 return -1; 1061 } 1062 break; 1063 default: 1064 reiserfs_warning(s, "super-6505", 1065 "head of option \"%s\" is only correct\n", 1066 opt->option_name); 1067 return -1; 1068 } 1069 1070 /* 1071 * move to the argument, or to next option if argument is not 1072 * required 1073 */ 1074 p++; 1075 1076 if (opt->arg_required 1077 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY)) 1078 && !strlen(p)) { 1079 /* this catches "option=," if not allowed */ 1080 reiserfs_warning(s, "super-6506", 1081 "empty argument for \"%s\"\n", 1082 opt->option_name); 1083 return -1; 1084 } 1085 1086 if (!opt->values) { 1087 /* *=NULLopt_arg contains pointer to argument */ 1088 *opt_arg = p; 1089 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY); 1090 } 1091 1092 /* values possible for this option are listed in opt->values */ 1093 for (arg = opt->values; arg->value; arg++) { 1094 if (!strcmp(p, arg->value)) { 1095 if (bit_flags) { 1096 *bit_flags &= ~arg->clrmask; 1097 *bit_flags |= arg->setmask; 1098 } 1099 return opt->arg_required; 1100 } 1101 } 1102 1103 reiserfs_warning(s, "super-6506", 1104 "bad value \"%s\" for option \"%s\"\n", p, 1105 opt->option_name); 1106 return -1; 1107} 1108 1109/* returns 0 if something is wrong in option string, 1 - otherwise */ 1110static int reiserfs_parse_options(struct super_block *s, 1111 1112 /* string given via mount's -o */ 1113 char *options, 1114 1115 /* 1116 * after the parsing phase, contains the 1117 * collection of bitflags defining what 1118 * mount options were selected. 1119 */ 1120 unsigned long *mount_options, 1121 1122 /* strtol-ed from NNN of resize=NNN */ 1123 unsigned long *blocks, 1124 char **jdev_name, 1125 unsigned int *commit_max_age, 1126 char **qf_names, 1127 unsigned int *qfmt) 1128{ 1129 int c; 1130 char *arg = NULL; 1131 char *pos; 1132 opt_desc_t opts[] = { 1133 /* 1134 * Compatibility stuff, so that -o notail for old 1135 * setups still work 1136 */ 1137 {"tails",.arg_required = 't',.values = tails}, 1138 {"notail",.clrmask = 1139 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, 1140 {"conv",.setmask = 1 << REISERFS_CONVERT}, 1141 {"attrs",.setmask = 1 << REISERFS_ATTRS}, 1142 {"noattrs",.clrmask = 1 << REISERFS_ATTRS}, 1143 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT}, 1144#ifdef CONFIG_REISERFS_FS_XATTR 1145 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER}, 1146 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER}, 1147#else 1148 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, 1149 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, 1150#endif 1151#ifdef CONFIG_REISERFS_FS_POSIX_ACL 1152 {"acl",.setmask = 1 << REISERFS_POSIXACL}, 1153 {"noacl",.clrmask = 1 << REISERFS_POSIXACL}, 1154#else 1155 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, 1156 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, 1157#endif 1158 {.option_name = "nolog"}, 1159 {"replayonly",.setmask = 1 << REPLAYONLY}, 1160 {"block-allocator",.arg_required = 'a',.values = balloc}, 1161 {"data",.arg_required = 'd',.values = logging_mode}, 1162 {"barrier",.arg_required = 'b',.values = barrier_mode}, 1163 {"resize",.arg_required = 'r',.values = NULL}, 1164 {"jdev",.arg_required = 'j',.values = NULL}, 1165 {"nolargeio",.arg_required = 'w',.values = NULL}, 1166 {"commit",.arg_required = 'c',.values = NULL}, 1167 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA}, 1168 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA}, 1169 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA}, 1170 {"errors",.arg_required = 'e',.values = error_actions}, 1171 {"usrjquota",.arg_required = 1172 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, 1173 {"grpjquota",.arg_required = 1174 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, 1175 {"jqfmt",.arg_required = 'f',.values = NULL}, 1176 {.option_name = NULL} 1177 }; 1178 1179 *blocks = 0; 1180 if (!options || !*options) 1181 /* 1182 * use default configuration: create tails, journaling on, no 1183 * conversion to newest format 1184 */ 1185 return 1; 1186 1187 for (pos = options; pos;) { 1188 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options); 1189 if (c == -1) 1190 /* wrong option is given */ 1191 return 0; 1192 1193 if (c == 'r') { 1194 char *p; 1195 1196 p = NULL; 1197 /* "resize=NNN" or "resize=auto" */ 1198 1199 if (!strcmp(arg, "auto")) { 1200 /* From JFS code, to auto-get the size. */ 1201 *blocks = sb_bdev_nr_blocks(s); 1202 } else { 1203 *blocks = simple_strtoul(arg, &p, 0); 1204 if (*p != '\0') { 1205 /* NNN does not look like a number */ 1206 reiserfs_warning(s, "super-6507", 1207 "bad value %s for " 1208 "-oresize\n", arg); 1209 return 0; 1210 } 1211 } 1212 } 1213 1214 if (c == 'c') { 1215 char *p = NULL; 1216 unsigned long val = simple_strtoul(arg, &p, 0); 1217 /* commit=NNN (time in seconds) */ 1218 if (*p != '\0' || val >= (unsigned int)-1) { 1219 reiserfs_warning(s, "super-6508", 1220 "bad value %s for -ocommit\n", 1221 arg); 1222 return 0; 1223 } 1224 *commit_max_age = (unsigned int)val; 1225 } 1226 1227 if (c == 'w') { 1228 reiserfs_warning(s, "super-6509", "nolargeio option " 1229 "is no longer supported"); 1230 return 0; 1231 } 1232 1233 if (c == 'j') { 1234 if (arg && *arg && jdev_name) { 1235 /* Hm, already assigned? */ 1236 if (*jdev_name) { 1237 reiserfs_warning(s, "super-6510", 1238 "journal device was " 1239 "already specified to " 1240 "be %s", *jdev_name); 1241 return 0; 1242 } 1243 *jdev_name = arg; 1244 } 1245 } 1246#ifdef CONFIG_QUOTA 1247 if (c == 'u' || c == 'g') { 1248 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; 1249 1250 if (sb_any_quota_loaded(s) && 1251 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) { 1252 reiserfs_warning(s, "super-6511", 1253 "cannot change journaled " 1254 "quota options when quota " 1255 "turned on."); 1256 return 0; 1257 } 1258 if (qf_names[qtype] != 1259 REISERFS_SB(s)->s_qf_names[qtype]) 1260 kfree(qf_names[qtype]); 1261 qf_names[qtype] = NULL; 1262 if (*arg) { /* Some filename specified? */ 1263 if (REISERFS_SB(s)->s_qf_names[qtype] 1264 && strcmp(REISERFS_SB(s)->s_qf_names[qtype], 1265 arg)) { 1266 reiserfs_warning(s, "super-6512", 1267 "%s quota file " 1268 "already specified.", 1269 QTYPE2NAME(qtype)); 1270 return 0; 1271 } 1272 if (strchr(arg, '/')) { 1273 reiserfs_warning(s, "super-6513", 1274 "quotafile must be " 1275 "on filesystem root."); 1276 return 0; 1277 } 1278 qf_names[qtype] = kstrdup(arg, GFP_KERNEL); 1279 if (!qf_names[qtype]) { 1280 reiserfs_warning(s, "reiserfs-2502", 1281 "not enough memory " 1282 "for storing " 1283 "quotafile name."); 1284 return 0; 1285 } 1286 if (qtype == USRQUOTA) 1287 *mount_options |= 1 << REISERFS_USRQUOTA; 1288 else 1289 *mount_options |= 1 << REISERFS_GRPQUOTA; 1290 } else { 1291 if (qtype == USRQUOTA) 1292 *mount_options &= ~(1 << REISERFS_USRQUOTA); 1293 else 1294 *mount_options &= ~(1 << REISERFS_GRPQUOTA); 1295 } 1296 } 1297 if (c == 'f') { 1298 if (!strcmp(arg, "vfsold")) 1299 *qfmt = QFMT_VFS_OLD; 1300 else if (!strcmp(arg, "vfsv0")) 1301 *qfmt = QFMT_VFS_V0; 1302 else { 1303 reiserfs_warning(s, "super-6514", 1304 "unknown quota format " 1305 "specified."); 1306 return 0; 1307 } 1308 if (sb_any_quota_loaded(s) && 1309 *qfmt != REISERFS_SB(s)->s_jquota_fmt) { 1310 reiserfs_warning(s, "super-6515", 1311 "cannot change journaled " 1312 "quota options when quota " 1313 "turned on."); 1314 return 0; 1315 } 1316 } 1317#else 1318 if (c == 'u' || c == 'g' || c == 'f') { 1319 reiserfs_warning(s, "reiserfs-2503", "journaled " 1320 "quota options not supported."); 1321 return 0; 1322 } 1323#endif 1324 } 1325 1326#ifdef CONFIG_QUOTA 1327 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt 1328 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) { 1329 reiserfs_warning(s, "super-6515", 1330 "journaled quota format not specified."); 1331 return 0; 1332 } 1333 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) && 1334 sb_has_quota_loaded(s, USRQUOTA)) || 1335 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) && 1336 sb_has_quota_loaded(s, GRPQUOTA))) { 1337 reiserfs_warning(s, "super-6516", "quota options must " 1338 "be present when quota is turned on."); 1339 return 0; 1340 } 1341#endif 1342 1343 return 1; 1344} 1345 1346static void switch_data_mode(struct super_block *s, unsigned long mode) 1347{ 1348 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | 1349 (1 << REISERFS_DATA_ORDERED) | 1350 (1 << REISERFS_DATA_WRITEBACK)); 1351 REISERFS_SB(s)->s_mount_opt |= (1 << mode); 1352} 1353 1354static void handle_data_mode(struct super_block *s, unsigned long mount_options) 1355{ 1356 if (mount_options & (1 << REISERFS_DATA_LOG)) { 1357 if (!reiserfs_data_log(s)) { 1358 switch_data_mode(s, REISERFS_DATA_LOG); 1359 reiserfs_info(s, "switching to journaled data mode\n"); 1360 } 1361 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { 1362 if (!reiserfs_data_ordered(s)) { 1363 switch_data_mode(s, REISERFS_DATA_ORDERED); 1364 reiserfs_info(s, "switching to ordered data mode\n"); 1365 } 1366 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { 1367 if (!reiserfs_data_writeback(s)) { 1368 switch_data_mode(s, REISERFS_DATA_WRITEBACK); 1369 reiserfs_info(s, "switching to writeback data mode\n"); 1370 } 1371 } 1372} 1373 1374static void handle_barrier_mode(struct super_block *s, unsigned long bits) 1375{ 1376 int flush = (1 << REISERFS_BARRIER_FLUSH); 1377 int none = (1 << REISERFS_BARRIER_NONE); 1378 int all_barrier = flush | none; 1379 1380 if (bits & all_barrier) { 1381 REISERFS_SB(s)->s_mount_opt &= ~all_barrier; 1382 if (bits & flush) { 1383 REISERFS_SB(s)->s_mount_opt |= flush; 1384 printk("reiserfs: enabling write barrier flush mode\n"); 1385 } else if (bits & none) { 1386 REISERFS_SB(s)->s_mount_opt |= none; 1387 printk("reiserfs: write barriers turned off\n"); 1388 } 1389 } 1390} 1391 1392static void handle_attrs(struct super_block *s) 1393{ 1394 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s); 1395 1396 if (reiserfs_attrs(s)) { 1397 if (old_format_only(s)) { 1398 reiserfs_warning(s, "super-6517", "cannot support " 1399 "attributes on 3.5.x disk format"); 1400 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); 1401 return; 1402 } 1403 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) { 1404 reiserfs_warning(s, "super-6518", "cannot support " 1405 "attributes until flag is set in " 1406 "super-block"); 1407 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); 1408 } 1409 } 1410} 1411 1412#ifdef CONFIG_QUOTA 1413static void handle_quota_files(struct super_block *s, char **qf_names, 1414 unsigned int *qfmt) 1415{ 1416 int i; 1417 1418 for (i = 0; i < REISERFS_MAXQUOTAS; i++) { 1419 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) 1420 kfree(REISERFS_SB(s)->s_qf_names[i]); 1421 REISERFS_SB(s)->s_qf_names[i] = qf_names[i]; 1422 } 1423 if (*qfmt) 1424 REISERFS_SB(s)->s_jquota_fmt = *qfmt; 1425} 1426#endif 1427 1428static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) 1429{ 1430 struct reiserfs_super_block *rs; 1431 struct reiserfs_transaction_handle th; 1432 unsigned long blocks; 1433 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; 1434 unsigned long safe_mask = 0; 1435 unsigned int commit_max_age = (unsigned int)-1; 1436 struct reiserfs_journal *journal = SB_JOURNAL(s); 1437 int err; 1438 char *qf_names[REISERFS_MAXQUOTAS]; 1439 unsigned int qfmt = 0; 1440#ifdef CONFIG_QUOTA 1441 int i; 1442#endif 1443 1444 sync_filesystem(s); 1445 reiserfs_write_lock(s); 1446 1447#ifdef CONFIG_QUOTA 1448 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names)); 1449#endif 1450 1451 rs = SB_DISK_SUPER_BLOCK(s); 1452 1453 if (!reiserfs_parse_options 1454 (s, arg, &mount_options, &blocks, NULL, &commit_max_age, 1455 qf_names, &qfmt)) { 1456#ifdef CONFIG_QUOTA 1457 for (i = 0; i < REISERFS_MAXQUOTAS; i++) 1458 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) 1459 kfree(qf_names[i]); 1460#endif 1461 err = -EINVAL; 1462 goto out_err_unlock; 1463 } 1464#ifdef CONFIG_QUOTA 1465 handle_quota_files(s, qf_names, &qfmt); 1466#endif 1467 1468 handle_attrs(s); 1469 1470 /* Add options that are safe here */ 1471 safe_mask |= 1 << REISERFS_SMALLTAIL; 1472 safe_mask |= 1 << REISERFS_LARGETAIL; 1473 safe_mask |= 1 << REISERFS_NO_BORDER; 1474 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; 1475 safe_mask |= 1 << REISERFS_HASHED_RELOCATION; 1476 safe_mask |= 1 << REISERFS_TEST4; 1477 safe_mask |= 1 << REISERFS_ATTRS; 1478 safe_mask |= 1 << REISERFS_XATTRS_USER; 1479 safe_mask |= 1 << REISERFS_POSIXACL; 1480 safe_mask |= 1 << REISERFS_BARRIER_FLUSH; 1481 safe_mask |= 1 << REISERFS_BARRIER_NONE; 1482 safe_mask |= 1 << REISERFS_ERROR_RO; 1483 safe_mask |= 1 << REISERFS_ERROR_CONTINUE; 1484 safe_mask |= 1 << REISERFS_ERROR_PANIC; 1485 safe_mask |= 1 << REISERFS_USRQUOTA; 1486 safe_mask |= 1 << REISERFS_GRPQUOTA; 1487 1488 /* 1489 * Update the bitmask, taking care to keep 1490 * the bits we're not allowed to change here 1491 */ 1492 REISERFS_SB(s)->s_mount_opt = 1493 (REISERFS_SB(s)-> 1494 s_mount_opt & ~safe_mask) | (mount_options & safe_mask); 1495 1496 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) { 1497 journal->j_max_commit_age = commit_max_age; 1498 journal->j_max_trans_age = commit_max_age; 1499 } else if (commit_max_age == 0) { 1500 /* 0 means restore defaults. */ 1501 journal->j_max_commit_age = journal->j_default_max_commit_age; 1502 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; 1503 } 1504 1505 if (blocks) { 1506 err = reiserfs_resize(s, blocks); 1507 if (err != 0) 1508 goto out_err_unlock; 1509 } 1510 1511 if (*mount_flags & SB_RDONLY) { 1512 reiserfs_write_unlock(s); 1513 reiserfs_xattr_init(s, *mount_flags); 1514 /* remount read-only */ 1515 if (sb_rdonly(s)) 1516 /* it is read-only already */ 1517 goto out_ok_unlocked; 1518 1519 err = dquot_suspend(s, -1); 1520 if (err < 0) 1521 goto out_err; 1522 1523 /* try to remount file system with read-only permissions */ 1524 if (sb_umount_state(rs) == REISERFS_VALID_FS 1525 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { 1526 goto out_ok_unlocked; 1527 } 1528 1529 reiserfs_write_lock(s); 1530 1531 err = journal_begin(&th, s, 10); 1532 if (err) 1533 goto out_err_unlock; 1534 1535 /* Mounting a rw partition read-only. */ 1536 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); 1537 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state); 1538 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); 1539 } else { 1540 /* remount read-write */ 1541 if (!sb_rdonly(s)) { 1542 reiserfs_write_unlock(s); 1543 reiserfs_xattr_init(s, *mount_flags); 1544 goto out_ok_unlocked; /* We are read-write already */ 1545 } 1546 1547 if (reiserfs_is_journal_aborted(journal)) { 1548 err = journal->j_errno; 1549 goto out_err_unlock; 1550 } 1551 1552 handle_data_mode(s, mount_options); 1553 handle_barrier_mode(s, mount_options); 1554 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); 1555 1556 /* now it is safe to call journal_begin */ 1557 s->s_flags &= ~SB_RDONLY; 1558 err = journal_begin(&th, s, 10); 1559 if (err) 1560 goto out_err_unlock; 1561 1562 /* Mount a partition which is read-only, read-write */ 1563 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); 1564 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); 1565 s->s_flags &= ~SB_RDONLY; 1566 set_sb_umount_state(rs, REISERFS_ERROR_FS); 1567 if (!old_format_only(s)) 1568 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); 1569 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ 1570 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); 1571 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS; 1572 } 1573 /* this will force a full flush of all journal lists */ 1574 SB_JOURNAL(s)->j_must_wait = 1; 1575 err = journal_end(&th); 1576 if (err) 1577 goto out_err_unlock; 1578 1579 reiserfs_write_unlock(s); 1580 if (!(*mount_flags & SB_RDONLY)) { 1581 dquot_resume(s, -1); 1582 reiserfs_write_lock(s); 1583 finish_unfinished(s); 1584 reiserfs_write_unlock(s); 1585 reiserfs_xattr_init(s, *mount_flags); 1586 } 1587 1588out_ok_unlocked: 1589 return 0; 1590 1591out_err_unlock: 1592 reiserfs_write_unlock(s); 1593out_err: 1594 return err; 1595} 1596 1597static int read_super_block(struct super_block *s, int offset) 1598{ 1599 struct buffer_head *bh; 1600 struct reiserfs_super_block *rs; 1601 int fs_blocksize; 1602 1603 bh = sb_bread(s, offset / s->s_blocksize); 1604 if (!bh) { 1605 reiserfs_warning(s, "sh-2006", 1606 "bread failed (dev %s, block %lu, size %lu)", 1607 s->s_id, offset / s->s_blocksize, 1608 s->s_blocksize); 1609 return 1; 1610 } 1611 1612 rs = (struct reiserfs_super_block *)bh->b_data; 1613 if (!is_any_reiserfs_magic_string(rs)) { 1614 brelse(bh); 1615 return 1; 1616 } 1617 /* 1618 * ok, reiserfs signature (old or new) found in at the given offset 1619 */ 1620 fs_blocksize = sb_blocksize(rs); 1621 brelse(bh); 1622 sb_set_blocksize(s, fs_blocksize); 1623 1624 bh = sb_bread(s, offset / s->s_blocksize); 1625 if (!bh) { 1626 reiserfs_warning(s, "sh-2007", 1627 "bread failed (dev %s, block %lu, size %lu)", 1628 s->s_id, offset / s->s_blocksize, 1629 s->s_blocksize); 1630 return 1; 1631 } 1632 1633 rs = (struct reiserfs_super_block *)bh->b_data; 1634 if (sb_blocksize(rs) != s->s_blocksize) { 1635 reiserfs_warning(s, "sh-2011", "can't find a reiserfs " 1636 "filesystem on (dev %s, block %llu, size %lu)", 1637 s->s_id, 1638 (unsigned long long)bh->b_blocknr, 1639 s->s_blocksize); 1640 brelse(bh); 1641 return 1; 1642 } 1643 1644 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) { 1645 brelse(bh); 1646 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck " 1647 "--rebuild-tree run detected. Please run\n" 1648 "reiserfsck --rebuild-tree and wait for a " 1649 "completion. If that fails\n" 1650 "get newer reiserfsprogs package"); 1651 return 1; 1652 } 1653 1654 reiserfs_warning(NULL, "", "reiserfs filesystem is deprecated and " 1655 "scheduled to be removed from the kernel in 2025"); 1656 SB_BUFFER_WITH_SB(s) = bh; 1657 SB_DISK_SUPER_BLOCK(s) = rs; 1658 1659 /* 1660 * magic is of non-standard journal filesystem, look at s_version to 1661 * find which format is in use 1662 */ 1663 if (is_reiserfs_jr(rs)) { 1664 if (sb_version(rs) == REISERFS_VERSION_2) 1665 reiserfs_info(s, "found reiserfs format \"3.6\"" 1666 " with non-standard journal\n"); 1667 else if (sb_version(rs) == REISERFS_VERSION_1) 1668 reiserfs_info(s, "found reiserfs format \"3.5\"" 1669 " with non-standard journal\n"); 1670 else { 1671 reiserfs_warning(s, "sh-2012", "found unknown " 1672 "format \"%u\" of reiserfs with " 1673 "non-standard magic", sb_version(rs)); 1674 return 1; 1675 } 1676 } else 1677 /* 1678 * s_version of standard format may contain incorrect 1679 * information, so we just look at the magic string 1680 */ 1681 reiserfs_info(s, 1682 "found reiserfs format \"%s\" with standard journal\n", 1683 is_reiserfs_3_5(rs) ? "3.5" : "3.6"); 1684 1685 s->s_op = &reiserfs_sops; 1686 s->s_export_op = &reiserfs_export_ops; 1687#ifdef CONFIG_QUOTA 1688 s->s_qcop = &reiserfs_qctl_operations; 1689 s->dq_op = &reiserfs_quota_operations; 1690 s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 1691#endif 1692 1693 /* 1694 * new format is limited by the 32 bit wide i_blocks field, want to 1695 * be one full block below that. 1696 */ 1697 s->s_maxbytes = (512LL << 32) - s->s_blocksize; 1698 return 0; 1699} 1700 1701/* after journal replay, reread all bitmap and super blocks */ 1702static int reread_meta_blocks(struct super_block *s) 1703{ 1704 if (bh_read(SB_BUFFER_WITH_SB(s), 0) < 0) { 1705 reiserfs_warning(s, "reiserfs-2504", "error reading the super"); 1706 return 1; 1707 } 1708 1709 return 0; 1710} 1711 1712/* hash detection stuff */ 1713 1714/* 1715 * if root directory is empty - we set default - Yura's - hash and 1716 * warn about it 1717 * FIXME: we look for only one name in a directory. If tea and yura 1718 * both have the same value - we ask user to send report to the 1719 * mailing list 1720 */ 1721static __u32 find_hash_out(struct super_block *s) 1722{ 1723 int retval; 1724 struct inode *inode; 1725 struct cpu_key key; 1726 INITIALIZE_PATH(path); 1727 struct reiserfs_dir_entry de; 1728 struct reiserfs_de_head *deh; 1729 __u32 hash = DEFAULT_HASH; 1730 __u32 deh_hashval, teahash, r5hash, yurahash; 1731 1732 inode = d_inode(s->s_root); 1733 1734 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3); 1735 retval = search_by_entry_key(s, &key, &path, &de); 1736 if (retval == IO_ERROR) { 1737 pathrelse(&path); 1738 return UNSET_HASH; 1739 } 1740 if (retval == NAME_NOT_FOUND) 1741 de.de_entry_num--; 1742 1743 set_de_name_and_namelen(&de); 1744 deh = de.de_deh + de.de_entry_num; 1745 1746 if (deh_offset(deh) == DOT_DOT_OFFSET) { 1747 /* allow override in this case */ 1748 if (reiserfs_rupasov_hash(s)) 1749 hash = YURA_HASH; 1750 reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n"); 1751 goto out; 1752 } 1753 1754 deh_hashval = GET_HASH_VALUE(deh_offset(deh)); 1755 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen)); 1756 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen)); 1757 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen)); 1758 1759 if ((teahash == r5hash && deh_hashval == r5hash) || 1760 (teahash == yurahash && deh_hashval == yurahash) || 1761 (r5hash == yurahash && deh_hashval == yurahash)) { 1762 reiserfs_warning(s, "reiserfs-2506", 1763 "Unable to automatically detect hash " 1764 "function. Please mount with -o " 1765 "hash={tea,rupasov,r5}"); 1766 hash = UNSET_HASH; 1767 goto out; 1768 } 1769 1770 if (deh_hashval == yurahash) 1771 hash = YURA_HASH; 1772 else if (deh_hashval == teahash) 1773 hash = TEA_HASH; 1774 else if (deh_hashval == r5hash) 1775 hash = R5_HASH; 1776 else { 1777 reiserfs_warning(s, "reiserfs-2506", 1778 "Unrecognised hash function"); 1779 hash = UNSET_HASH; 1780 } 1781out: 1782 pathrelse(&path); 1783 return hash; 1784} 1785 1786/* finds out which hash names are sorted with */ 1787static int what_hash(struct super_block *s) 1788{ 1789 __u32 code; 1790 1791 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); 1792 1793 /* 1794 * reiserfs_hash_detect() == true if any of the hash mount options 1795 * were used. We must check them to make sure the user isn't 1796 * using a bad hash value 1797 */ 1798 if (code == UNSET_HASH || reiserfs_hash_detect(s)) 1799 code = find_hash_out(s); 1800 1801 if (code != UNSET_HASH && reiserfs_hash_detect(s)) { 1802 /* 1803 * detection has found the hash, and we must check against the 1804 * mount options 1805 */ 1806 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { 1807 reiserfs_warning(s, "reiserfs-2507", 1808 "Error, %s hash detected, " 1809 "unable to force rupasov hash", 1810 reiserfs_hashname(code)); 1811 code = UNSET_HASH; 1812 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { 1813 reiserfs_warning(s, "reiserfs-2508", 1814 "Error, %s hash detected, " 1815 "unable to force tea hash", 1816 reiserfs_hashname(code)); 1817 code = UNSET_HASH; 1818 } else if (reiserfs_r5_hash(s) && code != R5_HASH) { 1819 reiserfs_warning(s, "reiserfs-2509", 1820 "Error, %s hash detected, " 1821 "unable to force r5 hash", 1822 reiserfs_hashname(code)); 1823 code = UNSET_HASH; 1824 } 1825 } else { 1826 /* 1827 * find_hash_out was not called or 1828 * could not determine the hash 1829 */ 1830 if (reiserfs_rupasov_hash(s)) { 1831 code = YURA_HASH; 1832 } else if (reiserfs_tea_hash(s)) { 1833 code = TEA_HASH; 1834 } else if (reiserfs_r5_hash(s)) { 1835 code = R5_HASH; 1836 } 1837 } 1838 1839 /* 1840 * if we are mounted RW, and we have a new valid hash code, update 1841 * the super 1842 */ 1843 if (code != UNSET_HASH && 1844 !sb_rdonly(s) && 1845 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { 1846 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); 1847 } 1848 return code; 1849} 1850 1851/* return pointer to appropriate function */ 1852static hashf_t hash_function(struct super_block *s) 1853{ 1854 switch (what_hash(s)) { 1855 case TEA_HASH: 1856 reiserfs_info(s, "Using tea hash to sort names\n"); 1857 return keyed_hash; 1858 case YURA_HASH: 1859 reiserfs_info(s, "Using rupasov hash to sort names\n"); 1860 return yura_hash; 1861 case R5_HASH: 1862 reiserfs_info(s, "Using r5 hash to sort names\n"); 1863 return r5_hash; 1864 } 1865 return NULL; 1866} 1867 1868/* this is used to set up correct value for old partitions */ 1869static int function2code(hashf_t func) 1870{ 1871 if (func == keyed_hash) 1872 return TEA_HASH; 1873 if (func == yura_hash) 1874 return YURA_HASH; 1875 if (func == r5_hash) 1876 return R5_HASH; 1877 1878 BUG(); /* should never happen */ 1879 1880 return 0; 1881} 1882 1883#define SWARN(silent, s, id, ...) \ 1884 if (!(silent)) \ 1885 reiserfs_warning(s, id, __VA_ARGS__) 1886 1887static int reiserfs_fill_super(struct super_block *s, void *data, int silent) 1888{ 1889 struct inode *root_inode; 1890 struct reiserfs_transaction_handle th; 1891 int old_format = 0; 1892 unsigned long blocks; 1893 unsigned int commit_max_age = 0; 1894 int jinit_done = 0; 1895 struct reiserfs_iget_args args; 1896 struct reiserfs_super_block *rs; 1897 char *jdev_name; 1898 struct reiserfs_sb_info *sbi; 1899 int errval = -EINVAL; 1900 char *qf_names[REISERFS_MAXQUOTAS] = {}; 1901 unsigned int qfmt = 0; 1902 1903 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); 1904 if (!sbi) 1905 return -ENOMEM; 1906 s->s_fs_info = sbi; 1907 /* Set default values for options: non-aggressive tails, RO on errors */ 1908 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL); 1909 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO); 1910 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH); 1911 /* no preallocation minimum, be smart in reiserfs_file_write instead */ 1912 sbi->s_alloc_options.preallocmin = 0; 1913 /* Preallocate by 16 blocks (17-1) at once */ 1914 sbi->s_alloc_options.preallocsize = 17; 1915 /* setup default block allocator options */ 1916 reiserfs_init_alloc_options(s); 1917 1918 spin_lock_init(&sbi->old_work_lock); 1919 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits); 1920 mutex_init(&sbi->lock); 1921 sbi->lock_depth = -1; 1922 1923 sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0, 1924 s->s_id); 1925 if (!sbi->commit_wq) { 1926 SWARN(silent, s, "", "Cannot allocate commit workqueue"); 1927 errval = -ENOMEM; 1928 goto error_unlocked; 1929 } 1930 1931 jdev_name = NULL; 1932 if (reiserfs_parse_options 1933 (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name, 1934 &commit_max_age, qf_names, &qfmt) == 0) { 1935 goto error_unlocked; 1936 } 1937 if (jdev_name && jdev_name[0]) { 1938 sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL); 1939 if (!sbi->s_jdev) { 1940 SWARN(silent, s, "", "Cannot allocate memory for " 1941 "journal device name"); 1942 goto error_unlocked; 1943 } 1944 } 1945#ifdef CONFIG_QUOTA 1946 handle_quota_files(s, qf_names, &qfmt); 1947#endif 1948 1949 if (blocks) { 1950 SWARN(silent, s, "jmacd-7", "resize option for remount only"); 1951 goto error_unlocked; 1952 } 1953 1954 /* 1955 * try old format (undistributed bitmap, super block in 8-th 1k 1956 * block of a device) 1957 */ 1958 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) 1959 old_format = 1; 1960 1961 /* 1962 * try new format (64-th 1k block), which can contain reiserfs 1963 * super block 1964 */ 1965 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) { 1966 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s", 1967 s->s_id); 1968 goto error_unlocked; 1969 } 1970 1971 s->s_time_min = 0; 1972 s->s_time_max = U32_MAX; 1973 1974 rs = SB_DISK_SUPER_BLOCK(s); 1975 /* 1976 * Let's do basic sanity check to verify that underlying device is not 1977 * smaller than the filesystem. If the check fails then abort and 1978 * scream, because bad stuff will happen otherwise. 1979 */ 1980 if (bdev_nr_bytes(s->s_bdev) < sb_block_count(rs) * sb_blocksize(rs)) { 1981 SWARN(silent, s, "", "Filesystem cannot be " 1982 "mounted because it is bigger than the device"); 1983 SWARN(silent, s, "", "You may need to run fsck " 1984 "or increase size of your LVM partition"); 1985 SWARN(silent, s, "", "Or may be you forgot to " 1986 "reboot after fdisk when it told you to"); 1987 goto error_unlocked; 1988 } 1989 1990 sbi->s_mount_state = SB_REISERFS_STATE(s); 1991 sbi->s_mount_state = REISERFS_VALID_FS; 1992 1993 if ((errval = reiserfs_init_bitmap_cache(s))) { 1994 SWARN(silent, s, "jmacd-8", "unable to read bitmap"); 1995 goto error_unlocked; 1996 } 1997 1998 errval = -EINVAL; 1999#ifdef CONFIG_REISERFS_CHECK 2000 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON"); 2001 SWARN(silent, s, "", "- it is slow mode for debugging."); 2002#endif 2003 2004 /* make data=ordered the default */ 2005 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && 2006 !reiserfs_data_writeback(s)) { 2007 sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); 2008 } 2009 2010 if (reiserfs_data_log(s)) { 2011 reiserfs_info(s, "using journaled data mode\n"); 2012 } else if (reiserfs_data_ordered(s)) { 2013 reiserfs_info(s, "using ordered data mode\n"); 2014 } else { 2015 reiserfs_info(s, "using writeback data mode\n"); 2016 } 2017 if (reiserfs_barrier_flush(s)) { 2018 printk("reiserfs: using flush barriers\n"); 2019 } 2020 2021 if (journal_init(s, jdev_name, old_format, commit_max_age)) { 2022 SWARN(silent, s, "sh-2022", 2023 "unable to initialize journal space"); 2024 goto error_unlocked; 2025 } else { 2026 /* 2027 * once this is set, journal_release must be called 2028 * if we error out of the mount 2029 */ 2030 jinit_done = 1; 2031 } 2032 2033 if (reread_meta_blocks(s)) { 2034 SWARN(silent, s, "jmacd-9", 2035 "unable to reread meta blocks after journal init"); 2036 goto error_unlocked; 2037 } 2038 2039 if (replay_only(s)) 2040 goto error_unlocked; 2041 2042 s->s_xattr = reiserfs_xattr_handlers; 2043 2044 if (bdev_read_only(s->s_bdev) && !sb_rdonly(s)) { 2045 SWARN(silent, s, "clm-7000", 2046 "Detected readonly device, marking FS readonly"); 2047 s->s_flags |= SB_RDONLY; 2048 } 2049 args.objectid = REISERFS_ROOT_OBJECTID; 2050 args.dirid = REISERFS_ROOT_PARENT_OBJECTID; 2051 root_inode = 2052 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, 2053 reiserfs_init_locked_inode, (void *)&args); 2054 if (!root_inode) { 2055 SWARN(silent, s, "jmacd-10", "get root inode failed"); 2056 goto error_unlocked; 2057 } 2058 2059 /* 2060 * This path assumed to be called with the BKL in the old times. 2061 * Now we have inherited the big reiserfs lock from it and many 2062 * reiserfs helpers called in the mount path and elsewhere require 2063 * this lock to be held even if it's not always necessary. Let's be 2064 * conservative and hold it early. The window can be reduced after 2065 * careful review of the code. 2066 */ 2067 reiserfs_write_lock(s); 2068 2069 if (root_inode->i_state & I_NEW) { 2070 reiserfs_read_locked_inode(root_inode, &args); 2071 unlock_new_inode(root_inode); 2072 } 2073 2074 if (!S_ISDIR(root_inode->i_mode) || !inode_get_bytes(root_inode) || 2075 !root_inode->i_size) { 2076 SWARN(silent, s, "", "corrupt root inode, run fsck"); 2077 iput(root_inode); 2078 errval = -EUCLEAN; 2079 goto error; 2080 } 2081 2082 s->s_root = d_make_root(root_inode); 2083 if (!s->s_root) 2084 goto error; 2085 /* define and initialize hash function */ 2086 sbi->s_hash_function = hash_function(s); 2087 if (sbi->s_hash_function == NULL) { 2088 dput(s->s_root); 2089 s->s_root = NULL; 2090 goto error; 2091 } 2092 2093 if (is_reiserfs_3_5(rs) 2094 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) 2095 set_bit(REISERFS_3_5, &sbi->s_properties); 2096 else if (old_format) 2097 set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties); 2098 else 2099 set_bit(REISERFS_3_6, &sbi->s_properties); 2100 2101 if (!sb_rdonly(s)) { 2102 2103 errval = journal_begin(&th, s, 1); 2104 if (errval) { 2105 dput(s->s_root); 2106 s->s_root = NULL; 2107 goto error; 2108 } 2109 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); 2110 2111 set_sb_umount_state(rs, REISERFS_ERROR_FS); 2112 set_sb_fs_state(rs, 0); 2113 2114 /* 2115 * Clear out s_bmap_nr if it would wrap. We can handle this 2116 * case, but older revisions can't. This will cause the 2117 * file system to fail mount on those older implementations, 2118 * avoiding corruption. -jeffm 2119 */ 2120 if (bmap_would_wrap(reiserfs_bmap_count(s)) && 2121 sb_bmap_nr(rs) != 0) { 2122 reiserfs_warning(s, "super-2030", "This file system " 2123 "claims to use %u bitmap blocks in " 2124 "its super block, but requires %u. " 2125 "Clearing to zero.", sb_bmap_nr(rs), 2126 reiserfs_bmap_count(s)); 2127 2128 set_sb_bmap_nr(rs, 0); 2129 } 2130 2131 if (old_format_only(s)) { 2132 /* 2133 * filesystem of format 3.5 either with standard 2134 * or non-standard journal 2135 */ 2136 if (convert_reiserfs(s)) { 2137 /* and -o conv is given */ 2138 if (!silent) 2139 reiserfs_info(s, 2140 "converting 3.5 filesystem to the 3.6 format"); 2141 2142 if (is_reiserfs_3_5(rs)) 2143 /* 2144 * put magic string of 3.6 format. 2145 * 2.2 will not be able to 2146 * mount this filesystem anymore 2147 */ 2148 memcpy(rs->s_v1.s_magic, 2149 reiserfs_3_6_magic_string, 2150 sizeof 2151 (reiserfs_3_6_magic_string)); 2152 2153 set_sb_version(rs, REISERFS_VERSION_2); 2154 reiserfs_convert_objectid_map_v1(s); 2155 set_bit(REISERFS_3_6, &sbi->s_properties); 2156 clear_bit(REISERFS_3_5, &sbi->s_properties); 2157 } else if (!silent) { 2158 reiserfs_info(s, "using 3.5.x disk format\n"); 2159 } 2160 } else 2161 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); 2162 2163 2164 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); 2165 errval = journal_end(&th); 2166 if (errval) { 2167 dput(s->s_root); 2168 s->s_root = NULL; 2169 goto error; 2170 } 2171 2172 reiserfs_write_unlock(s); 2173 if ((errval = reiserfs_lookup_privroot(s)) || 2174 (errval = reiserfs_xattr_init(s, s->s_flags))) { 2175 dput(s->s_root); 2176 s->s_root = NULL; 2177 goto error_unlocked; 2178 } 2179 reiserfs_write_lock(s); 2180 2181 /* 2182 * look for files which were to be removed in previous session 2183 */ 2184 finish_unfinished(s); 2185 } else { 2186 if (old_format_only(s) && !silent) { 2187 reiserfs_info(s, "using 3.5.x disk format\n"); 2188 } 2189 2190 reiserfs_write_unlock(s); 2191 if ((errval = reiserfs_lookup_privroot(s)) || 2192 (errval = reiserfs_xattr_init(s, s->s_flags))) { 2193 dput(s->s_root); 2194 s->s_root = NULL; 2195 goto error_unlocked; 2196 } 2197 reiserfs_write_lock(s); 2198 } 2199 /* 2200 * mark hash in super block: it could be unset. overwrite should be ok 2201 */ 2202 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); 2203 2204 handle_attrs(s); 2205 2206 reiserfs_proc_info_init(s); 2207 2208 init_waitqueue_head(&(sbi->s_wait)); 2209 spin_lock_init(&sbi->bitmap_lock); 2210 2211 reiserfs_write_unlock(s); 2212 2213 return (0); 2214 2215error: 2216 reiserfs_write_unlock(s); 2217 2218error_unlocked: 2219 /* kill the commit thread, free journal ram */ 2220 if (jinit_done) { 2221 reiserfs_write_lock(s); 2222 journal_release_error(NULL, s); 2223 reiserfs_write_unlock(s); 2224 } 2225 2226 if (sbi->commit_wq) 2227 destroy_workqueue(sbi->commit_wq); 2228 2229 reiserfs_cancel_old_flush(s); 2230 2231 reiserfs_free_bitmap_cache(s); 2232 if (SB_BUFFER_WITH_SB(s)) 2233 brelse(SB_BUFFER_WITH_SB(s)); 2234#ifdef CONFIG_QUOTA 2235 { 2236 int j; 2237 for (j = 0; j < REISERFS_MAXQUOTAS; j++) 2238 kfree(qf_names[j]); 2239 } 2240#endif 2241 kfree(sbi->s_jdev); 2242 kfree(sbi); 2243 2244 s->s_fs_info = NULL; 2245 return errval; 2246} 2247 2248static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) 2249{ 2250 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb); 2251 2252 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize)); 2253 buf->f_bfree = sb_free_blocks(rs); 2254 buf->f_bavail = buf->f_bfree; 2255 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; 2256 buf->f_bsize = dentry->d_sb->s_blocksize; 2257 /* changed to accommodate gcc folks. */ 2258 buf->f_type = REISERFS_SUPER_MAGIC; 2259 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2); 2260 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2, 2261 sizeof(rs->s_uuid)/2); 2262 2263 return 0; 2264} 2265 2266#ifdef CONFIG_QUOTA 2267static int reiserfs_write_dquot(struct dquot *dquot) 2268{ 2269 struct reiserfs_transaction_handle th; 2270 int ret, err; 2271 int depth; 2272 2273 reiserfs_write_lock(dquot->dq_sb); 2274 ret = 2275 journal_begin(&th, dquot->dq_sb, 2276 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 2277 if (ret) 2278 goto out; 2279 depth = reiserfs_write_unlock_nested(dquot->dq_sb); 2280 ret = dquot_commit(dquot); 2281 reiserfs_write_lock_nested(dquot->dq_sb, depth); 2282 err = journal_end(&th); 2283 if (!ret && err) 2284 ret = err; 2285out: 2286 reiserfs_write_unlock(dquot->dq_sb); 2287 return ret; 2288} 2289 2290static int reiserfs_acquire_dquot(struct dquot *dquot) 2291{ 2292 struct reiserfs_transaction_handle th; 2293 int ret, err; 2294 int depth; 2295 2296 reiserfs_write_lock(dquot->dq_sb); 2297 ret = 2298 journal_begin(&th, dquot->dq_sb, 2299 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 2300 if (ret) 2301 goto out; 2302 depth = reiserfs_write_unlock_nested(dquot->dq_sb); 2303 ret = dquot_acquire(dquot); 2304 reiserfs_write_lock_nested(dquot->dq_sb, depth); 2305 err = journal_end(&th); 2306 if (!ret && err) 2307 ret = err; 2308out: 2309 reiserfs_write_unlock(dquot->dq_sb); 2310 return ret; 2311} 2312 2313static int reiserfs_release_dquot(struct dquot *dquot) 2314{ 2315 struct reiserfs_transaction_handle th; 2316 int ret, err; 2317 2318 reiserfs_write_lock(dquot->dq_sb); 2319 ret = 2320 journal_begin(&th, dquot->dq_sb, 2321 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 2322 reiserfs_write_unlock(dquot->dq_sb); 2323 if (ret) { 2324 /* Release dquot anyway to avoid endless cycle in dqput() */ 2325 dquot_release(dquot); 2326 goto out; 2327 } 2328 ret = dquot_release(dquot); 2329 reiserfs_write_lock(dquot->dq_sb); 2330 err = journal_end(&th); 2331 if (!ret && err) 2332 ret = err; 2333 reiserfs_write_unlock(dquot->dq_sb); 2334out: 2335 return ret; 2336} 2337 2338static int reiserfs_mark_dquot_dirty(struct dquot *dquot) 2339{ 2340 /* Are we journaling quotas? */ 2341 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 2342 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 2343 dquot_mark_dquot_dirty(dquot); 2344 return reiserfs_write_dquot(dquot); 2345 } else 2346 return dquot_mark_dquot_dirty(dquot); 2347} 2348 2349static int reiserfs_write_info(struct super_block *sb, int type) 2350{ 2351 struct reiserfs_transaction_handle th; 2352 int ret, err; 2353 int depth; 2354 2355 /* Data block + inode block */ 2356 reiserfs_write_lock(sb); 2357 ret = journal_begin(&th, sb, 2); 2358 if (ret) 2359 goto out; 2360 depth = reiserfs_write_unlock_nested(sb); 2361 ret = dquot_commit_info(sb, type); 2362 reiserfs_write_lock_nested(sb, depth); 2363 err = journal_end(&th); 2364 if (!ret && err) 2365 ret = err; 2366out: 2367 reiserfs_write_unlock(sb); 2368 return ret; 2369} 2370 2371/* 2372 * Turn on quotas during mount time - we need to find the quota file and such... 2373 */ 2374static int reiserfs_quota_on_mount(struct super_block *sb, int type) 2375{ 2376 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type], 2377 REISERFS_SB(sb)->s_jquota_fmt, type); 2378} 2379 2380/* 2381 * Standard function to be called on quota_on 2382 */ 2383static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, 2384 const struct path *path) 2385{ 2386 int err; 2387 struct inode *inode; 2388 struct reiserfs_transaction_handle th; 2389 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA; 2390 2391 reiserfs_write_lock(sb); 2392 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) { 2393 err = -EINVAL; 2394 goto out; 2395 } 2396 2397 /* Quotafile not on the same filesystem? */ 2398 if (path->dentry->d_sb != sb) { 2399 err = -EXDEV; 2400 goto out; 2401 } 2402 inode = d_inode(path->dentry); 2403 /* 2404 * We must not pack tails for quota files on reiserfs for quota 2405 * IO to work 2406 */ 2407 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) { 2408 err = reiserfs_unpack(inode); 2409 if (err) { 2410 reiserfs_warning(sb, "super-6520", 2411 "Unpacking tail of quota file failed" 2412 " (%d). Cannot turn on quotas.", err); 2413 err = -EINVAL; 2414 goto out; 2415 } 2416 mark_inode_dirty(inode); 2417 } 2418 /* Journaling quota? */ 2419 if (REISERFS_SB(sb)->s_qf_names[type]) { 2420 /* Quotafile not of fs root? */ 2421 if (path->dentry->d_parent != sb->s_root) 2422 reiserfs_warning(sb, "super-6521", 2423 "Quota file not on filesystem root. " 2424 "Journalled quota will not work."); 2425 } 2426 2427 /* 2428 * When we journal data on quota file, we have to flush journal to see 2429 * all updates to the file when we bypass pagecache... 2430 */ 2431 if (reiserfs_file_data_log(inode)) { 2432 /* Just start temporary transaction and finish it */ 2433 err = journal_begin(&th, sb, 1); 2434 if (err) 2435 goto out; 2436 err = journal_end_sync(&th); 2437 if (err) 2438 goto out; 2439 } 2440 reiserfs_write_unlock(sb); 2441 err = dquot_quota_on(sb, type, format_id, path); 2442 if (!err) { 2443 inode_lock(inode); 2444 REISERFS_I(inode)->i_attrs |= REISERFS_IMMUTABLE_FL | 2445 REISERFS_NOATIME_FL; 2446 inode_set_flags(inode, S_IMMUTABLE | S_NOATIME, 2447 S_IMMUTABLE | S_NOATIME); 2448 inode_unlock(inode); 2449 mark_inode_dirty(inode); 2450 } 2451 return err; 2452out: 2453 reiserfs_write_unlock(sb); 2454 return err; 2455} 2456 2457static int reiserfs_quota_off(struct super_block *sb, int type) 2458{ 2459 int err; 2460 struct inode *inode = sb_dqopt(sb)->files[type]; 2461 2462 if (!inode || !igrab(inode)) 2463 goto out; 2464 2465 err = dquot_quota_off(sb, type); 2466 if (err) 2467 goto out_put; 2468 2469 inode_lock(inode); 2470 REISERFS_I(inode)->i_attrs &= ~(REISERFS_IMMUTABLE_FL | 2471 REISERFS_NOATIME_FL); 2472 inode_set_flags(inode, 0, S_IMMUTABLE | S_NOATIME); 2473 inode_unlock(inode); 2474 mark_inode_dirty(inode); 2475out_put: 2476 iput(inode); 2477 return err; 2478out: 2479 return dquot_quota_off(sb, type); 2480} 2481 2482/* 2483 * Read data from quotafile - avoid pagecache and such because we cannot afford 2484 * acquiring the locks... As quota files are never truncated and quota code 2485 * itself serializes the operations (and no one else should touch the files) 2486 * we don't have to be afraid of races 2487 */ 2488static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, 2489 size_t len, loff_t off) 2490{ 2491 struct inode *inode = sb_dqopt(sb)->files[type]; 2492 unsigned long blk = off >> sb->s_blocksize_bits; 2493 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; 2494 size_t toread; 2495 struct buffer_head tmp_bh, *bh; 2496 loff_t i_size = i_size_read(inode); 2497 2498 if (off > i_size) 2499 return 0; 2500 if (off + len > i_size) 2501 len = i_size - off; 2502 toread = len; 2503 while (toread > 0) { 2504 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread); 2505 tmp_bh.b_state = 0; 2506 /* 2507 * Quota files are without tails so we can safely 2508 * use this function 2509 */ 2510 reiserfs_write_lock(sb); 2511 err = reiserfs_get_block(inode, blk, &tmp_bh, 0); 2512 reiserfs_write_unlock(sb); 2513 if (err) 2514 return err; 2515 if (!buffer_mapped(&tmp_bh)) /* A hole? */ 2516 memset(data, 0, tocopy); 2517 else { 2518 bh = sb_bread(sb, tmp_bh.b_blocknr); 2519 if (!bh) 2520 return -EIO; 2521 memcpy(data, bh->b_data + offset, tocopy); 2522 brelse(bh); 2523 } 2524 offset = 0; 2525 toread -= tocopy; 2526 data += tocopy; 2527 blk++; 2528 } 2529 return len; 2530} 2531 2532/* 2533 * Write to quotafile (we know the transaction is already started and has 2534 * enough credits) 2535 */ 2536static ssize_t reiserfs_quota_write(struct super_block *sb, int type, 2537 const char *data, size_t len, loff_t off) 2538{ 2539 struct inode *inode = sb_dqopt(sb)->files[type]; 2540 unsigned long blk = off >> sb->s_blocksize_bits; 2541 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; 2542 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; 2543 size_t towrite = len; 2544 struct buffer_head tmp_bh, *bh; 2545 2546 if (!current->journal_info) { 2547 printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n", 2548 (unsigned long long)off, (unsigned long long)len); 2549 return -EIO; 2550 } 2551 while (towrite > 0) { 2552 tocopy = min_t(unsigned long, sb->s_blocksize - offset, towrite); 2553 tmp_bh.b_state = 0; 2554 reiserfs_write_lock(sb); 2555 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); 2556 reiserfs_write_unlock(sb); 2557 if (err) 2558 goto out; 2559 if (offset || tocopy != sb->s_blocksize) 2560 bh = sb_bread(sb, tmp_bh.b_blocknr); 2561 else 2562 bh = sb_getblk(sb, tmp_bh.b_blocknr); 2563 if (!bh) { 2564 err = -EIO; 2565 goto out; 2566 } 2567 lock_buffer(bh); 2568 memcpy(bh->b_data + offset, data, tocopy); 2569 flush_dcache_page(bh->b_page); 2570 set_buffer_uptodate(bh); 2571 unlock_buffer(bh); 2572 reiserfs_write_lock(sb); 2573 reiserfs_prepare_for_journal(sb, bh, 1); 2574 journal_mark_dirty(current->journal_info, bh); 2575 if (!journal_quota) 2576 reiserfs_add_ordered_list(inode, bh); 2577 reiserfs_write_unlock(sb); 2578 brelse(bh); 2579 offset = 0; 2580 towrite -= tocopy; 2581 data += tocopy; 2582 blk++; 2583 } 2584out: 2585 if (len == towrite) 2586 return err; 2587 if (inode->i_size < off + len - towrite) 2588 i_size_write(inode, off + len - towrite); 2589 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); 2590 mark_inode_dirty(inode); 2591 return len - towrite; 2592} 2593 2594#endif 2595 2596static struct dentry *get_super_block(struct file_system_type *fs_type, 2597 int flags, const char *dev_name, 2598 void *data) 2599{ 2600 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super); 2601} 2602 2603static int __init init_reiserfs_fs(void) 2604{ 2605 int ret; 2606 2607 ret = init_inodecache(); 2608 if (ret) 2609 return ret; 2610 2611 reiserfs_proc_info_global_init(); 2612 2613 ret = register_filesystem(&reiserfs_fs_type); 2614 if (ret) 2615 goto out; 2616 2617 return 0; 2618out: 2619 reiserfs_proc_info_global_done(); 2620 destroy_inodecache(); 2621 2622 return ret; 2623} 2624 2625static void __exit exit_reiserfs_fs(void) 2626{ 2627 reiserfs_proc_info_global_done(); 2628 unregister_filesystem(&reiserfs_fs_type); 2629 destroy_inodecache(); 2630} 2631 2632struct file_system_type reiserfs_fs_type = { 2633 .owner = THIS_MODULE, 2634 .name = "reiserfs", 2635 .mount = get_super_block, 2636 .kill_sb = reiserfs_kill_sb, 2637 .fs_flags = FS_REQUIRES_DEV, 2638}; 2639MODULE_ALIAS_FS("reiserfs"); 2640 2641MODULE_DESCRIPTION("ReiserFS journaled filesystem"); 2642MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>"); 2643MODULE_LICENSE("GPL"); 2644 2645module_init(init_reiserfs_fs); 2646module_exit(exit_reiserfs_fs); 2647