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/config.h> 15 #include <linux/module.h> 16 #include <linux/vmalloc.h> 17 #include <linux/time.h> 18 #include <asm/uaccess.h> 19 #include <linux/reiserfs_fs.h> 20 #include <linux/reiserfs_acl.h> 21 #include <linux/reiserfs_xattr.h> 22 #include <linux/smp_lock.h> 23 #include <linux/init.h> 24 #include <linux/blkdev.h> 25 #include <linux/buffer_head.h> 26 #include <linux/vfs.h> 27 #include <linux/namespace.h> 28 #include <linux/mount.h> 29 #include <linux/namei.h> 30 #include <linux/quotaops.h> 31 32 struct file_system_type reiserfs_fs_type; 33 34 static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING; 35 static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING; 36 static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING; 37 38 int is_reiserfs_3_5 (struct reiserfs_super_block * rs) 39 { 40 return !strncmp (rs->s_v1.s_magic, reiserfs_3_5_magic_string, 41 strlen (reiserfs_3_5_magic_string)); 42 } 43 44 45 int is_reiserfs_3_6 (struct reiserfs_super_block * rs) 46 { 47 return !strncmp (rs->s_v1.s_magic, reiserfs_3_6_magic_string, 48 strlen (reiserfs_3_6_magic_string)); 49 } 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 59 static int is_any_reiserfs_magic_string (struct reiserfs_super_block * rs) 60 { 61 return (is_reiserfs_3_5 (rs) || is_reiserfs_3_6 (rs) || 62 is_reiserfs_jr (rs)); 63 } 64 65 static int reiserfs_remount (struct super_block * s, int * flags, char * data); 66 static int reiserfs_statfs (struct super_block * s, struct kstatfs * buf); 67 68 static int reiserfs_sync_fs (struct super_block * s, int wait) 69 { 70 if (!(s->s_flags & MS_RDONLY)) { 71 struct reiserfs_transaction_handle th; 72 reiserfs_write_lock(s); 73 if (!journal_begin(&th, s, 1)) 74 if (!journal_end_sync(&th, s, 1)) 75 reiserfs_flush_old_commits(s); 76 s->s_dirt = 0; /* Even if it's not true. 77 * We'll loop forever in sync_supers otherwise */ 78 reiserfs_write_unlock(s); 79 } else { 80 s->s_dirt = 0; 81 } 82 return 0; 83 } 84 85 static void reiserfs_write_super(struct super_block *s) 86 { 87 reiserfs_sync_fs(s, 1); 88 } 89 90 static void reiserfs_write_super_lockfs (struct super_block * s) 91 { 92 struct reiserfs_transaction_handle th ; 93 reiserfs_write_lock(s); 94 if (!(s->s_flags & MS_RDONLY)) { 95 int err = journal_begin(&th, s, 1) ; 96 if (err) { 97 reiserfs_block_writes(&th) ; 98 } else { 99 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); 100 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s)); 101 reiserfs_block_writes(&th) ; 102 journal_end_sync(&th, s, 1) ; 103 } 104 } 105 s->s_dirt = 0; 106 reiserfs_write_unlock(s); 107 } 108 109 static void reiserfs_unlockfs(struct super_block *s) { 110 reiserfs_allow_writes(s) ; 111 } 112 113 extern const struct in_core_key MAX_IN_CORE_KEY; 114 115 116 /* this is used to delete "save link" when there are no items of a 117 file it points to. It can either happen if unlink is completed but 118 "save unlink" removal, or if file has both unlink and truncate 119 pending and as unlink completes first (because key of "save link" 120 protecting unlink is bigger that a key lf "save link" which 121 protects truncate), so there left no items to make truncate 122 completion on */ 123 static int remove_save_link_only (struct super_block * s, struct reiserfs_key * key, int oid_free) 124 { 125 struct reiserfs_transaction_handle th; 126 int err; 127 128 /* we are going to do one balancing */ 129 err = journal_begin (&th, s, JOURNAL_PER_BALANCE_CNT); 130 if (err) 131 return err; 132 133 reiserfs_delete_solid_item (&th, NULL, key); 134 if (oid_free) 135 /* removals are protected by direct items */ 136 reiserfs_release_objectid (&th, le32_to_cpu (key->k_objectid)); 137 138 return journal_end (&th, s, JOURNAL_PER_BALANCE_CNT); 139 } 140 141 #ifdef CONFIG_QUOTA 142 static int reiserfs_quota_on_mount(struct super_block *, int); 143 #endif 144 145 /* look for uncompleted unlinks and truncates and complete them */ 146 static int finish_unfinished (struct super_block * s) 147 { 148 INITIALIZE_PATH (path); 149 struct cpu_key max_cpu_key, obj_key; 150 struct reiserfs_key save_link_key; 151 int retval = 0; 152 struct item_head * ih; 153 struct buffer_head * bh; 154 int item_pos; 155 char * item; 156 int done; 157 struct inode * inode; 158 int truncate; 159 #ifdef CONFIG_QUOTA 160 int i; 161 int ms_active_set; 162 #endif 163 164 165 /* compose key to look for "save" links */ 166 max_cpu_key.version = KEY_FORMAT_3_5; 167 max_cpu_key.on_disk_key.k_dir_id = ~0U; 168 max_cpu_key.on_disk_key.k_objectid = ~0U; 169 set_cpu_key_k_offset (&max_cpu_key, ~0U); 170 max_cpu_key.key_length = 3; 171 172 #ifdef CONFIG_QUOTA 173 /* Needed for iput() to work correctly and not trash data */ 174 if (s->s_flags & MS_ACTIVE) { 175 ms_active_set = 0; 176 } else { 177 ms_active_set = 1; 178 s->s_flags |= MS_ACTIVE; 179 } 180 /* Turn on quotas so that they are updated correctly */ 181 for (i = 0; i < MAXQUOTAS; i++) { 182 if (REISERFS_SB(s)->s_qf_names[i]) { 183 int ret = reiserfs_quota_on_mount(s, i); 184 if (ret < 0) 185 reiserfs_warning(s, "reiserfs: cannot turn on journalled quota: error %d", ret); 186 } 187 } 188 #endif 189 190 done = 0; 191 REISERFS_SB(s)->s_is_unlinked_ok = 1; 192 while (!retval) { 193 retval = search_item (s, &max_cpu_key, &path); 194 if (retval != ITEM_NOT_FOUND) { 195 reiserfs_warning (s, "vs-2140: finish_unfinished: search_by_key returned %d", 196 retval); 197 break; 198 } 199 200 bh = get_last_bh (&path); 201 item_pos = get_item_pos (&path); 202 if (item_pos != B_NR_ITEMS (bh)) { 203 reiserfs_warning (s, "vs-2060: finish_unfinished: wrong position found"); 204 break; 205 } 206 item_pos --; 207 ih = B_N_PITEM_HEAD (bh, item_pos); 208 209 if (le32_to_cpu (ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) 210 /* there are no "save" links anymore */ 211 break; 212 213 save_link_key = ih->ih_key; 214 if (is_indirect_le_ih (ih)) 215 truncate = 1; 216 else 217 truncate = 0; 218 219 /* reiserfs_iget needs k_dirid and k_objectid only */ 220 item = B_I_PITEM (bh, ih); 221 obj_key.on_disk_key.k_dir_id = le32_to_cpu (*(__le32 *)item); 222 obj_key.on_disk_key.k_objectid = le32_to_cpu (ih->ih_key.k_objectid); 223 obj_key.on_disk_key.k_offset = 0; 224 obj_key.on_disk_key.k_type = 0; 225 226 pathrelse (&path); 227 228 inode = reiserfs_iget (s, &obj_key); 229 if (!inode) { 230 /* the unlink almost completed, it just did not manage to remove 231 "save" link and release objectid */ 232 reiserfs_warning (s, "vs-2180: finish_unfinished: iget failed for %K", 233 &obj_key); 234 retval = remove_save_link_only (s, &save_link_key, 1); 235 continue; 236 } 237 238 if (!truncate && inode->i_nlink) { 239 /* file is not unlinked */ 240 reiserfs_warning (s, "vs-2185: finish_unfinished: file %K is not unlinked", 241 &obj_key); 242 retval = remove_save_link_only (s, &save_link_key, 0); 243 continue; 244 } 245 DQUOT_INIT(inode); 246 247 if (truncate && S_ISDIR (inode->i_mode) ) { 248 /* We got a truncate request for a dir which is impossible. 249 The only imaginable way is to execute unfinished truncate request 250 then boot into old kernel, remove the file and create dir with 251 the same key. */ 252 reiserfs_warning(s, "green-2101: impossible truncate on a directory %k. Please report", INODE_PKEY (inode)); 253 retval = remove_save_link_only (s, &save_link_key, 0); 254 truncate = 0; 255 iput (inode); 256 continue; 257 } 258 259 if (truncate) { 260 REISERFS_I(inode) -> i_flags |= i_link_saved_truncate_mask; 261 /* not completed truncate found. New size was committed together 262 with "save" link */ 263 reiserfs_info (s, "Truncating %k to %Ld ..", 264 INODE_PKEY (inode), inode->i_size); 265 reiserfs_truncate_file (inode, 0/*don't update modification time*/); 266 retval = remove_save_link (inode, truncate); 267 } else { 268 REISERFS_I(inode) -> i_flags |= i_link_saved_unlink_mask; 269 /* not completed unlink (rmdir) found */ 270 reiserfs_info (s, "Removing %k..", INODE_PKEY (inode)); 271 /* removal gets completed in iput */ 272 retval = 0; 273 } 274 275 iput (inode); 276 printk ("done\n"); 277 done ++; 278 } 279 REISERFS_SB(s)->s_is_unlinked_ok = 0; 280 281 #ifdef CONFIG_QUOTA 282 /* Turn quotas off */ 283 for (i = 0; i < MAXQUOTAS; i++) { 284 if (sb_dqopt(s)->files[i]) 285 vfs_quota_off_mount(s, i); 286 } 287 if (ms_active_set) 288 /* Restore the flag back */ 289 s->s_flags &= ~MS_ACTIVE; 290 #endif 291 pathrelse (&path); 292 if (done) 293 reiserfs_info (s, "There were %d uncompleted unlinks/truncates. " 294 "Completed\n", done); 295 return retval; 296 } 297 298 /* to protect file being unlinked from getting lost we "safe" link files 299 being unlinked. This link will be deleted in the same transaction with last 300 item of file. mounting the filesytem we scan all these links and remove 301 files which almost got lost */ 302 void add_save_link (struct reiserfs_transaction_handle * th, 303 struct inode * inode, int truncate) 304 { 305 INITIALIZE_PATH (path); 306 int retval; 307 struct cpu_key key; 308 struct item_head ih; 309 __le32 link; 310 311 BUG_ON (!th->t_trans_id); 312 313 /* file can only get one "save link" of each kind */ 314 RFALSE( truncate && 315 ( REISERFS_I(inode) -> i_flags & i_link_saved_truncate_mask ), 316 "saved link already exists for truncated inode %lx", 317 ( long ) inode -> i_ino ); 318 RFALSE( !truncate && 319 ( REISERFS_I(inode) -> i_flags & i_link_saved_unlink_mask ), 320 "saved link already exists for unlinked inode %lx", 321 ( long ) inode -> i_ino ); 322 323 /* setup key of "save" link */ 324 key.version = KEY_FORMAT_3_5; 325 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; 326 key.on_disk_key.k_objectid = inode->i_ino; 327 if (!truncate) { 328 /* unlink, rmdir, rename */ 329 set_cpu_key_k_offset (&key, 1 + inode->i_sb->s_blocksize); 330 set_cpu_key_k_type (&key, TYPE_DIRECT); 331 332 /* item head of "safe" link */ 333 make_le_item_head (&ih, &key, key.version, 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, 334 4/*length*/, 0xffff/*free space*/); 335 } else { 336 /* truncate */ 337 if (S_ISDIR (inode->i_mode)) 338 reiserfs_warning(inode->i_sb, "green-2102: Adding a truncate savelink for a directory %k! Please report", INODE_PKEY(inode)); 339 set_cpu_key_k_offset (&key, 1); 340 set_cpu_key_k_type (&key, TYPE_INDIRECT); 341 342 /* item head of "safe" link */ 343 make_le_item_head (&ih, &key, key.version, 1, TYPE_INDIRECT, 344 4/*length*/, 0/*free space*/); 345 } 346 key.key_length = 3; 347 348 /* look for its place in the tree */ 349 retval = search_item (inode->i_sb, &key, &path); 350 if (retval != ITEM_NOT_FOUND) { 351 if ( retval != -ENOSPC ) 352 reiserfs_warning (inode->i_sb, "vs-2100: add_save_link:" 353 "search_by_key (%K) returned %d", &key, retval); 354 pathrelse (&path); 355 return; 356 } 357 358 /* body of "save" link */ 359 link = INODE_PKEY (inode)->k_dir_id; 360 361 /* put "save" link inot tree, don't charge quota to anyone */ 362 retval = reiserfs_insert_item (th, &path, &key, &ih, NULL, (char *)&link); 363 if (retval) { 364 if (retval != -ENOSPC) 365 reiserfs_warning (inode->i_sb, "vs-2120: add_save_link: insert_item returned %d", 366 retval); 367 } else { 368 if( truncate ) 369 REISERFS_I(inode) -> i_flags |= i_link_saved_truncate_mask; 370 else 371 REISERFS_I(inode) -> i_flags |= i_link_saved_unlink_mask; 372 } 373 } 374 375 376 /* this opens transaction unlike add_save_link */ 377 int remove_save_link (struct inode * inode, int truncate) 378 { 379 struct reiserfs_transaction_handle th; 380 struct reiserfs_key key; 381 int err; 382 383 /* we are going to do one balancing only */ 384 err = journal_begin (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); 385 if (err) 386 return err; 387 388 /* setup key of "save" link */ 389 key.k_dir_id = cpu_to_le32 (MAX_KEY_OBJECTID); 390 key.k_objectid = INODE_PKEY (inode)->k_objectid; 391 if (!truncate) { 392 /* unlink, rmdir, rename */ 393 set_le_key_k_offset (KEY_FORMAT_3_5, &key, 394 1 + inode->i_sb->s_blocksize); 395 set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_DIRECT); 396 } else { 397 /* truncate */ 398 set_le_key_k_offset (KEY_FORMAT_3_5, &key, 1); 399 set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_INDIRECT); 400 } 401 402 if( ( truncate && 403 ( REISERFS_I(inode) -> i_flags & i_link_saved_truncate_mask ) ) || 404 ( !truncate && 405 ( REISERFS_I(inode) -> i_flags & i_link_saved_unlink_mask ) ) ) 406 /* don't take quota bytes from anywhere */ 407 reiserfs_delete_solid_item (&th, NULL, &key); 408 if (!truncate) { 409 reiserfs_release_objectid (&th, inode->i_ino); 410 REISERFS_I(inode) -> i_flags &= ~i_link_saved_unlink_mask; 411 } else 412 REISERFS_I(inode) -> i_flags &= ~i_link_saved_truncate_mask; 413 414 return journal_end (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); 415 } 416 417 418 static void reiserfs_put_super (struct super_block * s) 419 { 420 int i; 421 struct reiserfs_transaction_handle th ; 422 th.t_trans_id = 0; 423 424 if (REISERFS_SB(s)->xattr_root) { 425 d_invalidate (REISERFS_SB(s)->xattr_root); 426 dput (REISERFS_SB(s)->xattr_root); 427 } 428 429 if (REISERFS_SB(s)->priv_root) { 430 d_invalidate (REISERFS_SB(s)->priv_root); 431 dput (REISERFS_SB(s)->priv_root); 432 } 433 434 /* change file system state to current state if it was mounted with read-write permissions */ 435 if (!(s->s_flags & MS_RDONLY)) { 436 if (!journal_begin(&th, s, 10)) { 437 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ; 438 set_sb_umount_state( SB_DISK_SUPER_BLOCK(s), REISERFS_SB(s)->s_mount_state ); 439 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s)); 440 } 441 } 442 443 /* note, journal_release checks for readonly mount, and can decide not 444 ** to do a journal_end 445 */ 446 journal_release(&th, s) ; 447 448 for (i = 0; i < SB_BMAP_NR (s); i ++) 449 brelse (SB_AP_BITMAP (s)[i].bh); 450 451 vfree (SB_AP_BITMAP (s)); 452 453 brelse (SB_BUFFER_WITH_SB (s)); 454 455 print_statistics (s); 456 457 if (REISERFS_SB(s)->s_kmallocs != 0) { 458 reiserfs_warning (s, "vs-2004: reiserfs_put_super: allocated memory left %d", 459 REISERFS_SB(s)->s_kmallocs); 460 } 461 462 if (REISERFS_SB(s)->reserved_blocks != 0) { 463 reiserfs_warning (s, "green-2005: reiserfs_put_super: reserved blocks left %d", 464 REISERFS_SB(s)->reserved_blocks); 465 } 466 467 reiserfs_proc_info_done( s ); 468 469 kfree(s->s_fs_info); 470 s->s_fs_info = NULL; 471 472 return; 473 } 474 475 static kmem_cache_t * reiserfs_inode_cachep; 476 477 static struct inode *reiserfs_alloc_inode(struct super_block *sb) 478 { 479 struct reiserfs_inode_info *ei; 480 ei = (struct reiserfs_inode_info *)kmem_cache_alloc(reiserfs_inode_cachep, SLAB_KERNEL); 481 if (!ei) 482 return NULL; 483 return &ei->vfs_inode; 484 } 485 486 static void reiserfs_destroy_inode(struct inode *inode) 487 { 488 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); 489 } 490 491 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) 492 { 493 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *) foo; 494 495 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == 496 SLAB_CTOR_CONSTRUCTOR) { 497 INIT_LIST_HEAD(&ei->i_prealloc_list) ; 498 inode_init_once(&ei->vfs_inode); 499 ei->i_acl_access = NULL; 500 ei->i_acl_default = NULL; 501 } 502 } 503 504 static int init_inodecache(void) 505 { 506 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", 507 sizeof(struct reiserfs_inode_info), 508 0, SLAB_RECLAIM_ACCOUNT, 509 init_once, NULL); 510 if (reiserfs_inode_cachep == NULL) 511 return -ENOMEM; 512 return 0; 513 } 514 515 static void destroy_inodecache(void) 516 { 517 if (kmem_cache_destroy(reiserfs_inode_cachep)) 518 reiserfs_warning (NULL, "reiserfs_inode_cache: not all structures were freed"); 519 } 520 521 /* we don't mark inodes dirty, we just log them */ 522 static void reiserfs_dirty_inode (struct inode * inode) { 523 struct reiserfs_transaction_handle th ; 524 525 int err = 0; 526 if (inode->i_sb->s_flags & MS_RDONLY) { 527 reiserfs_warning(inode->i_sb, "clm-6006: writing inode %lu on readonly FS", 528 inode->i_ino) ; 529 return ; 530 } 531 reiserfs_write_lock(inode->i_sb); 532 533 /* this is really only used for atime updates, so they don't have 534 ** to be included in O_SYNC or fsync 535 */ 536 err = journal_begin(&th, inode->i_sb, 1) ; 537 if (err) { 538 reiserfs_write_unlock (inode->i_sb); 539 return; 540 } 541 reiserfs_update_sd (&th, inode); 542 journal_end(&th, inode->i_sb, 1) ; 543 reiserfs_write_unlock(inode->i_sb); 544 } 545 546 static void reiserfs_clear_inode (struct inode *inode) 547 { 548 struct posix_acl *acl; 549 550 acl = REISERFS_I(inode)->i_acl_access; 551 if (acl && !IS_ERR (acl)) 552 posix_acl_release (acl); 553 REISERFS_I(inode)->i_acl_access = NULL; 554 555 acl = REISERFS_I(inode)->i_acl_default; 556 if (acl && !IS_ERR (acl)) 557 posix_acl_release (acl); 558 REISERFS_I(inode)->i_acl_default = NULL; 559 } 560 561 #ifdef CONFIG_QUOTA 562 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, size_t, loff_t); 563 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, loff_t); 564 #endif 565 566 static struct super_operations reiserfs_sops = 567 { 568 .alloc_inode = reiserfs_alloc_inode, 569 .destroy_inode = reiserfs_destroy_inode, 570 .write_inode = reiserfs_write_inode, 571 .dirty_inode = reiserfs_dirty_inode, 572 .delete_inode = reiserfs_delete_inode, 573 .clear_inode = reiserfs_clear_inode, 574 .put_super = reiserfs_put_super, 575 .write_super = reiserfs_write_super, 576 .sync_fs = reiserfs_sync_fs, 577 .write_super_lockfs = reiserfs_write_super_lockfs, 578 .unlockfs = reiserfs_unlockfs, 579 .statfs = reiserfs_statfs, 580 .remount_fs = reiserfs_remount, 581 #ifdef CONFIG_QUOTA 582 .quota_read = reiserfs_quota_read, 583 .quota_write = reiserfs_quota_write, 584 #endif 585 }; 586 587 #ifdef CONFIG_QUOTA 588 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") 589 590 static int reiserfs_dquot_initialize(struct inode *, int); 591 static int reiserfs_dquot_drop(struct inode *); 592 static int reiserfs_write_dquot(struct dquot *); 593 static int reiserfs_acquire_dquot(struct dquot *); 594 static int reiserfs_release_dquot(struct dquot *); 595 static int reiserfs_mark_dquot_dirty(struct dquot *); 596 static int reiserfs_write_info(struct super_block *, int); 597 static int reiserfs_quota_on(struct super_block *, int, int, char *); 598 599 static struct dquot_operations reiserfs_quota_operations = 600 { 601 .initialize = reiserfs_dquot_initialize, 602 .drop = reiserfs_dquot_drop, 603 .alloc_space = dquot_alloc_space, 604 .alloc_inode = dquot_alloc_inode, 605 .free_space = dquot_free_space, 606 .free_inode = dquot_free_inode, 607 .transfer = dquot_transfer, 608 .write_dquot = reiserfs_write_dquot, 609 .acquire_dquot = reiserfs_acquire_dquot, 610 .release_dquot = reiserfs_release_dquot, 611 .mark_dirty = reiserfs_mark_dquot_dirty, 612 .write_info = reiserfs_write_info, 613 }; 614 615 static struct quotactl_ops reiserfs_qctl_operations = 616 { 617 .quota_on = reiserfs_quota_on, 618 .quota_off = vfs_quota_off, 619 .quota_sync = vfs_quota_sync, 620 .get_info = vfs_get_dqinfo, 621 .set_info = vfs_set_dqinfo, 622 .get_dqblk = vfs_get_dqblk, 623 .set_dqblk = vfs_set_dqblk, 624 }; 625 #endif 626 627 static struct export_operations reiserfs_export_ops = { 628 .encode_fh = reiserfs_encode_fh, 629 .decode_fh = reiserfs_decode_fh, 630 .get_parent = reiserfs_get_parent, 631 .get_dentry = reiserfs_get_dentry, 632 } ; 633 634 /* this struct is used in reiserfs_getopt () for containing the value for those 635 mount options that have values rather than being toggles. */ 636 typedef struct { 637 char * value; 638 int setmask; /* bitmask which is to set on mount_options bitmask when this 639 value is found, 0 is no bits are to be changed. */ 640 int clrmask; /* bitmask which is to clear on mount_options bitmask when this 641 value is found, 0 is no bits are to be changed. This is 642 applied BEFORE setmask */ 643 } arg_desc_t; 644 645 /* Set this bit in arg_required to allow empty arguments */ 646 #define REISERFS_OPT_ALLOWEMPTY 31 647 648 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs 649 mount options */ 650 typedef struct { 651 char * option_name; 652 int arg_required; /* 0 if argument is not required, not 0 otherwise */ 653 const arg_desc_t * values; /* list of values accepted by an option */ 654 int setmask; /* bitmask which is to set on mount_options bitmask when this 655 value is found, 0 is no bits are to be changed. */ 656 int clrmask; /* bitmask which is to clear on mount_options bitmask when this 657 value is found, 0 is no bits are to be changed. This is 658 applied BEFORE setmask */ 659 } opt_desc_t; 660 661 /* possible values for -o data= */ 662 static const arg_desc_t logging_mode[] = { 663 {"ordered", 1<<REISERFS_DATA_ORDERED, (1<<REISERFS_DATA_LOG|1<<REISERFS_DATA_WRITEBACK)}, 664 {"journal", 1<<REISERFS_DATA_LOG, (1<<REISERFS_DATA_ORDERED|1<<REISERFS_DATA_WRITEBACK)}, 665 {"writeback", 1<<REISERFS_DATA_WRITEBACK, (1<<REISERFS_DATA_ORDERED|1<<REISERFS_DATA_LOG)}, 666 {NULL, 0} 667 }; 668 669 /* possible values for -o barrier= */ 670 static const arg_desc_t barrier_mode[] = { 671 {"none", 1<<REISERFS_BARRIER_NONE, 1<<REISERFS_BARRIER_FLUSH}, 672 {"flush", 1<<REISERFS_BARRIER_FLUSH, 1<<REISERFS_BARRIER_NONE}, 673 {NULL, 0} 674 }; 675 676 /* possible values for "-o block-allocator=" and bits which are to be set in 677 s_mount_opt of reiserfs specific part of in-core super block */ 678 static const arg_desc_t balloc[] = { 679 {"noborder", 1<<REISERFS_NO_BORDER, 0}, 680 {"border", 0, 1<<REISERFS_NO_BORDER}, 681 {"no_unhashed_relocation", 1<<REISERFS_NO_UNHASHED_RELOCATION, 0}, 682 {"hashed_relocation", 1<<REISERFS_HASHED_RELOCATION, 0}, 683 {"test4", 1<<REISERFS_TEST4, 0}, 684 {"notest4", 0, 1<<REISERFS_TEST4}, 685 {NULL, 0, 0} 686 }; 687 688 static const arg_desc_t tails[] = { 689 {"on", 1<<REISERFS_LARGETAIL, 1<<REISERFS_SMALLTAIL}, 690 {"off", 0, (1<<REISERFS_LARGETAIL)|(1<<REISERFS_SMALLTAIL)}, 691 {"small", 1<<REISERFS_SMALLTAIL, 1<<REISERFS_LARGETAIL}, 692 {NULL, 0, 0} 693 }; 694 695 static const arg_desc_t error_actions[] = { 696 {"panic", 1 << REISERFS_ERROR_PANIC, 697 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, 698 {"ro-remount", 1 << REISERFS_ERROR_RO, 699 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, 700 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG 701 {"continue", 1 << REISERFS_ERROR_CONTINUE, 702 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, 703 #endif 704 {NULL, 0, 0}, 705 }; 706 707 int reiserfs_default_io_size = 128 * 1024; /* Default recommended I/O size is 128k. 708 There might be broken applications that are 709 confused by this. Use nolargeio mount option 710 to get usual i/o size = PAGE_SIZE. 711 */ 712 713 /* proceed only one option from a list *cur - string containing of mount options 714 opts - array of options which are accepted 715 opt_arg - if option is found and requires an argument and if it is specifed 716 in the input - pointer to the argument is stored here 717 bit_flags - if option requires to set a certain bit - it is set here 718 return -1 if unknown option is found, opt->arg_required otherwise */ 719 static int reiserfs_getopt ( struct super_block * s, char ** cur, opt_desc_t * opts, char ** opt_arg, 720 unsigned long * bit_flags) 721 { 722 char * p; 723 /* foo=bar, 724 ^ ^ ^ 725 | | +-- option_end 726 | +-- arg_start 727 +-- option_start 728 */ 729 const opt_desc_t * opt; 730 const arg_desc_t * arg; 731 732 733 p = *cur; 734 735 /* assume argument cannot contain commas */ 736 *cur = strchr (p, ','); 737 if (*cur) { 738 *(*cur) = '\0'; 739 (*cur) ++; 740 } 741 742 if ( !strncmp (p, "alloc=", 6) ) { 743 /* Ugly special case, probably we should redo options parser so that 744 it can understand several arguments for some options, also so that 745 it can fill several bitfields with option values. */ 746 if ( reiserfs_parse_alloc_options( s, p + 6) ) { 747 return -1; 748 } else { 749 return 0; 750 } 751 } 752 753 754 /* for every option in the list */ 755 for (opt = opts; opt->option_name; opt ++) { 756 if (!strncmp (p, opt->option_name, strlen (opt->option_name))) { 757 if (bit_flags) { 758 if (opt->clrmask == (1 << REISERFS_UNSUPPORTED_OPT)) 759 reiserfs_warning (s, "%s not supported.", p); 760 else 761 *bit_flags &= ~opt->clrmask; 762 if (opt->setmask == (1 << REISERFS_UNSUPPORTED_OPT)) 763 reiserfs_warning (s, "%s not supported.", p); 764 else 765 *bit_flags |= opt->setmask; 766 } 767 break; 768 } 769 } 770 if (!opt->option_name) { 771 reiserfs_warning (s, "unknown mount option \"%s\"", p); 772 return -1; 773 } 774 775 p += strlen (opt->option_name); 776 switch (*p) { 777 case '=': 778 if (!opt->arg_required) { 779 reiserfs_warning (s, "the option \"%s\" does not require an argument", 780 opt->option_name); 781 return -1; 782 } 783 break; 784 785 case 0: 786 if (opt->arg_required) { 787 reiserfs_warning (s, "the option \"%s\" requires an argument", opt->option_name); 788 return -1; 789 } 790 break; 791 default: 792 reiserfs_warning (s, "head of option \"%s\" is only correct", opt->option_name); 793 return -1; 794 } 795 796 /* move to the argument, or to next option if argument is not required */ 797 p ++; 798 799 if ( opt->arg_required && !(opt->arg_required & (1<<REISERFS_OPT_ALLOWEMPTY)) && !strlen (p) ) { 800 /* this catches "option=," if not allowed */ 801 reiserfs_warning (s, "empty argument for \"%s\"", opt->option_name); 802 return -1; 803 } 804 805 if (!opt->values) { 806 /* *=NULLopt_arg contains pointer to argument */ 807 *opt_arg = p; 808 return opt->arg_required & ~(1<<REISERFS_OPT_ALLOWEMPTY); 809 } 810 811 /* values possible for this option are listed in opt->values */ 812 for (arg = opt->values; arg->value; arg ++) { 813 if (!strcmp (p, arg->value)) { 814 if (bit_flags) { 815 *bit_flags &= ~arg->clrmask; 816 *bit_flags |= arg->setmask; 817 } 818 return opt->arg_required; 819 } 820 } 821 822 reiserfs_warning (s, "bad value \"%s\" for option \"%s\"", p, opt->option_name); 823 return -1; 824 } 825 826 /* returns 0 if something is wrong in option string, 1 - otherwise */ 827 static int reiserfs_parse_options (struct super_block * s, char * options, /* string given via mount's -o */ 828 unsigned long * mount_options, 829 /* after the parsing phase, contains the 830 collection of bitflags defining what 831 mount options were selected. */ 832 unsigned long * blocks, /* strtol-ed from NNN of resize=NNN */ 833 char ** jdev_name, 834 unsigned int * commit_max_age) 835 { 836 int c; 837 char * arg = NULL; 838 char * pos; 839 opt_desc_t opts[] = { 840 /* Compatibility stuff, so that -o notail for old setups still work */ 841 {"tails", .arg_required = 't', .values = tails}, 842 {"notail", .clrmask = (1<<REISERFS_LARGETAIL)|(1<<REISERFS_SMALLTAIL)}, 843 {"conv", .setmask = 1<<REISERFS_CONVERT}, 844 {"attrs", .setmask = 1<<REISERFS_ATTRS}, 845 {"noattrs", .clrmask = 1<<REISERFS_ATTRS}, 846 #ifdef CONFIG_REISERFS_FS_XATTR 847 {"user_xattr", .setmask = 1<<REISERFS_XATTRS_USER}, 848 {"nouser_xattr",.clrmask = 1<<REISERFS_XATTRS_USER}, 849 #else 850 {"user_xattr", .setmask = 1<<REISERFS_UNSUPPORTED_OPT}, 851 {"nouser_xattr",.clrmask = 1<<REISERFS_UNSUPPORTED_OPT}, 852 #endif 853 #ifdef CONFIG_REISERFS_FS_POSIX_ACL 854 {"acl", .setmask = 1<<REISERFS_POSIXACL}, 855 {"noacl", .clrmask = 1<<REISERFS_POSIXACL}, 856 #else 857 {"acl", .setmask = 1<<REISERFS_UNSUPPORTED_OPT}, 858 {"noacl", .clrmask = 1<<REISERFS_UNSUPPORTED_OPT}, 859 #endif 860 {"nolog",}, /* This is unsupported */ 861 {"replayonly", .setmask = 1<<REPLAYONLY}, 862 {"block-allocator", .arg_required = 'a', .values = balloc}, 863 {"data", .arg_required = 'd', .values = logging_mode}, 864 {"barrier", .arg_required = 'b', .values = barrier_mode}, 865 {"resize", .arg_required = 'r', .values = NULL}, 866 {"jdev", .arg_required = 'j', .values = NULL}, 867 {"nolargeio", .arg_required = 'w', .values = NULL}, 868 {"commit", .arg_required = 'c', .values = NULL}, 869 {"usrquota",}, 870 {"grpquota",}, 871 {"errors", .arg_required = 'e', .values = error_actions}, 872 {"usrjquota", .arg_required = 'u'|(1<<REISERFS_OPT_ALLOWEMPTY), .values = NULL}, 873 {"grpjquota", .arg_required = 'g'|(1<<REISERFS_OPT_ALLOWEMPTY), .values = NULL}, 874 {"jqfmt", .arg_required = 'f', .values = NULL}, 875 {NULL,} 876 }; 877 878 *blocks = 0; 879 if (!options || !*options) 880 /* use default configuration: create tails, journaling on, no 881 conversion to newest format */ 882 return 1; 883 884 for (pos = options; pos; ) { 885 c = reiserfs_getopt (s, &pos, opts, &arg, mount_options); 886 if (c == -1) 887 /* wrong option is given */ 888 return 0; 889 890 if (c == 'r') { 891 char * p; 892 893 p = NULL; 894 /* "resize=NNN" or "resize=auto" */ 895 896 if (!strcmp(arg, "auto")) { 897 /* From JFS code, to auto-get the size.*/ 898 *blocks = s->s_bdev->bd_inode->i_size >> s->s_blocksize_bits; 899 } else { 900 *blocks = simple_strtoul (arg, &p, 0); 901 if (*p != '\0') { 902 /* NNN does not look like a number */ 903 reiserfs_warning (s, "reiserfs_parse_options: bad value %s", arg); 904 return 0; 905 } 906 } 907 } 908 909 if ( c == 'c' ) { 910 char *p = NULL; 911 unsigned long val = simple_strtoul (arg, &p, 0); 912 /* commit=NNN (time in seconds) */ 913 if ( *p != '\0' || val >= (unsigned int)-1) { 914 reiserfs_warning (s, "reiserfs_parse_options: bad value %s", arg); 915 return 0; 916 } 917 *commit_max_age = (unsigned int)val; 918 } 919 920 if ( c == 'w' ) { 921 char *p=NULL; 922 int val = simple_strtoul (arg, &p, 0); 923 924 if ( *p != '\0') { 925 reiserfs_warning (s, "reiserfs_parse_options: non-numeric value %s for nolargeio option", arg); 926 return 0; 927 } 928 if ( val ) 929 reiserfs_default_io_size = PAGE_SIZE; 930 else 931 reiserfs_default_io_size = 128 * 1024; 932 } 933 934 if (c == 'j') { 935 if (arg && *arg && jdev_name) { 936 if ( *jdev_name ) { //Hm, already assigned? 937 reiserfs_warning (s, "reiserfs_parse_options: journal device was already specified to be %s", *jdev_name); 938 return 0; 939 } 940 *jdev_name = arg; 941 } 942 } 943 944 #ifdef CONFIG_QUOTA 945 if (c == 'u' || c == 'g') { 946 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; 947 948 if (sb_any_quota_enabled(s)) { 949 reiserfs_warning(s, "reiserfs_parse_options: cannot change journalled quota options when quota turned on."); 950 return 0; 951 } 952 if (*arg) { /* Some filename specified? */ 953 if (REISERFS_SB(s)->s_qf_names[qtype] && strcmp(REISERFS_SB(s)->s_qf_names[qtype], arg)) { 954 reiserfs_warning(s, "reiserfs_parse_options: %s quota file already specified.", QTYPE2NAME(qtype)); 955 return 0; 956 } 957 if (strchr(arg, '/')) { 958 reiserfs_warning(s, "reiserfs_parse_options: quotafile must be on filesystem root."); 959 return 0; 960 } 961 REISERFS_SB(s)->s_qf_names[qtype] = kmalloc(strlen(arg)+1, GFP_KERNEL); 962 if (!REISERFS_SB(s)->s_qf_names[qtype]) { 963 reiserfs_warning(s, "reiserfs_parse_options: not enough memory for storing quotafile name."); 964 return 0; 965 } 966 strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg); 967 } 968 else { 969 if (REISERFS_SB(s)->s_qf_names[qtype]) { 970 kfree(REISERFS_SB(s)->s_qf_names[qtype]); 971 REISERFS_SB(s)->s_qf_names[qtype] = NULL; 972 } 973 } 974 } 975 if (c == 'f') { 976 if (!strcmp(arg, "vfsold")) 977 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD; 978 else if (!strcmp(arg, "vfsv0")) 979 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0; 980 else { 981 reiserfs_warning(s, "reiserfs_parse_options: unknown quota format specified."); 982 return 0; 983 } 984 } 985 #else 986 if (c == 'u' || c == 'g' || c == 'f') { 987 reiserfs_warning(s, "reiserfs_parse_options: journalled quota options not supported."); 988 return 0; 989 } 990 #endif 991 } 992 993 #ifdef CONFIG_QUOTA 994 if (!REISERFS_SB(s)->s_jquota_fmt && (REISERFS_SB(s)->s_qf_names[USRQUOTA] || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) { 995 reiserfs_warning(s, "reiserfs_parse_options: journalled quota format not specified."); 996 return 0; 997 } 998 #endif 999 return 1; 1000 } 1001 1002 static void switch_data_mode(struct super_block *s, unsigned long mode) { 1003 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | 1004 (1 << REISERFS_DATA_ORDERED) | 1005 (1 << REISERFS_DATA_WRITEBACK)); 1006 REISERFS_SB(s)->s_mount_opt |= (1 << mode); 1007 } 1008 1009 static void handle_data_mode(struct super_block *s, unsigned long mount_options) 1010 { 1011 if (mount_options & (1 << REISERFS_DATA_LOG)) { 1012 if (!reiserfs_data_log(s)) { 1013 switch_data_mode(s, REISERFS_DATA_LOG); 1014 reiserfs_info (s, "switching to journaled data mode\n"); 1015 } 1016 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { 1017 if (!reiserfs_data_ordered(s)) { 1018 switch_data_mode(s, REISERFS_DATA_ORDERED); 1019 reiserfs_info (s, "switching to ordered data mode\n"); 1020 } 1021 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { 1022 if (!reiserfs_data_writeback(s)) { 1023 switch_data_mode(s, REISERFS_DATA_WRITEBACK); 1024 reiserfs_info (s, "switching to writeback data mode\n"); 1025 } 1026 } 1027 } 1028 1029 static void handle_barrier_mode(struct super_block *s, unsigned long bits) { 1030 int flush = (1 << REISERFS_BARRIER_FLUSH); 1031 int none = (1 << REISERFS_BARRIER_NONE); 1032 int all_barrier = flush | none; 1033 1034 if (bits & all_barrier) { 1035 REISERFS_SB(s)->s_mount_opt &= ~all_barrier; 1036 if (bits & flush) { 1037 REISERFS_SB(s)->s_mount_opt |= flush; 1038 printk("reiserfs: enabling write barrier flush mode\n"); 1039 } else if (bits & none) { 1040 REISERFS_SB(s)->s_mount_opt |= none; 1041 printk("reiserfs: write barriers turned off\n"); 1042 } 1043 } 1044 } 1045 1046 static void handle_attrs( struct super_block *s ) 1047 { 1048 struct reiserfs_super_block * rs; 1049 1050 if( reiserfs_attrs( s ) ) { 1051 rs = SB_DISK_SUPER_BLOCK (s); 1052 if( old_format_only(s) ) { 1053 reiserfs_warning(s, "reiserfs: cannot support attributes on 3.5.x disk format" ); 1054 REISERFS_SB(s) -> s_mount_opt &= ~ ( 1 << REISERFS_ATTRS ); 1055 return; 1056 } 1057 if( !( le32_to_cpu( rs -> s_flags ) & reiserfs_attrs_cleared ) ) { 1058 reiserfs_warning(s, "reiserfs: cannot support attributes until flag is set in super-block" ); 1059 REISERFS_SB(s) -> s_mount_opt &= ~ ( 1 << REISERFS_ATTRS ); 1060 } 1061 } 1062 } 1063 1064 static int reiserfs_remount (struct super_block * s, int * mount_flags, char * arg) 1065 { 1066 struct reiserfs_super_block * rs; 1067 struct reiserfs_transaction_handle th ; 1068 unsigned long blocks; 1069 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; 1070 unsigned long safe_mask = 0; 1071 unsigned int commit_max_age = (unsigned int)-1; 1072 struct reiserfs_journal *journal = SB_JOURNAL(s); 1073 int err; 1074 #ifdef CONFIG_QUOTA 1075 int i; 1076 #endif 1077 1078 rs = SB_DISK_SUPER_BLOCK (s); 1079 1080 if (!reiserfs_parse_options(s, arg, &mount_options, &blocks, NULL, &commit_max_age)) { 1081 #ifdef CONFIG_QUOTA 1082 for (i = 0; i < MAXQUOTAS; i++) 1083 if (REISERFS_SB(s)->s_qf_names[i]) { 1084 kfree(REISERFS_SB(s)->s_qf_names[i]); 1085 REISERFS_SB(s)->s_qf_names[i] = NULL; 1086 } 1087 #endif 1088 return -EINVAL; 1089 } 1090 1091 handle_attrs(s); 1092 1093 /* Add options that are safe here */ 1094 safe_mask |= 1 << REISERFS_SMALLTAIL; 1095 safe_mask |= 1 << REISERFS_LARGETAIL; 1096 safe_mask |= 1 << REISERFS_NO_BORDER; 1097 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; 1098 safe_mask |= 1 << REISERFS_HASHED_RELOCATION; 1099 safe_mask |= 1 << REISERFS_TEST4; 1100 safe_mask |= 1 << REISERFS_ATTRS; 1101 safe_mask |= 1 << REISERFS_XATTRS_USER; 1102 safe_mask |= 1 << REISERFS_POSIXACL; 1103 safe_mask |= 1 << REISERFS_BARRIER_FLUSH; 1104 safe_mask |= 1 << REISERFS_BARRIER_NONE; 1105 safe_mask |= 1 << REISERFS_ERROR_RO; 1106 safe_mask |= 1 << REISERFS_ERROR_CONTINUE; 1107 safe_mask |= 1 << REISERFS_ERROR_PANIC; 1108 1109 /* Update the bitmask, taking care to keep 1110 * the bits we're not allowed to change here */ 1111 REISERFS_SB(s)->s_mount_opt = (REISERFS_SB(s)->s_mount_opt & ~safe_mask) | (mount_options & safe_mask); 1112 1113 if(commit_max_age != 0 && commit_max_age != (unsigned int)-1) { 1114 journal->j_max_commit_age = commit_max_age; 1115 journal->j_max_trans_age = commit_max_age; 1116 } 1117 else if(commit_max_age == 0) 1118 { 1119 /* 0 means restore defaults. */ 1120 journal->j_max_commit_age = journal->j_default_max_commit_age; 1121 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; 1122 } 1123 1124 if(blocks) { 1125 int rc = reiserfs_resize(s, blocks); 1126 if (rc != 0) 1127 return rc; 1128 } 1129 1130 if (*mount_flags & MS_RDONLY) { 1131 reiserfs_xattr_init (s, *mount_flags); 1132 /* remount read-only */ 1133 if (s->s_flags & MS_RDONLY) 1134 /* it is read-only already */ 1135 return 0; 1136 /* try to remount file system with read-only permissions */ 1137 if (sb_umount_state(rs) == REISERFS_VALID_FS || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { 1138 return 0; 1139 } 1140 1141 err = journal_begin(&th, s, 10) ; 1142 if (err) 1143 return err; 1144 1145 /* Mounting a rw partition read-only. */ 1146 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ; 1147 set_sb_umount_state( rs, REISERFS_SB(s)->s_mount_state ); 1148 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s)); 1149 } else { 1150 /* remount read-write */ 1151 if (!(s->s_flags & MS_RDONLY)) { 1152 reiserfs_xattr_init (s, *mount_flags); 1153 return 0; /* We are read-write already */ 1154 } 1155 1156 if (reiserfs_is_journal_aborted (journal)) 1157 return journal->j_errno; 1158 1159 handle_data_mode(s, mount_options); 1160 handle_barrier_mode(s, mount_options); 1161 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs) ; 1162 s->s_flags &= ~MS_RDONLY ; /* now it is safe to call journal_begin */ 1163 err = journal_begin(&th, s, 10) ; 1164 if (err) 1165 return err; 1166 1167 /* Mount a partition which is read-only, read-write */ 1168 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ; 1169 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); 1170 s->s_flags &= ~MS_RDONLY; 1171 set_sb_umount_state( rs, REISERFS_ERROR_FS ); 1172 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ 1173 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s)); 1174 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS ; 1175 } 1176 /* this will force a full flush of all journal lists */ 1177 SB_JOURNAL(s)->j_must_wait = 1 ; 1178 err = journal_end(&th, s, 10) ; 1179 if (err) 1180 return err; 1181 s->s_dirt = 0; 1182 1183 if (!( *mount_flags & MS_RDONLY ) ) { 1184 finish_unfinished( s ); 1185 reiserfs_xattr_init (s, *mount_flags); 1186 } 1187 1188 return 0; 1189 } 1190 1191 /* load_bitmap_info_data - Sets up the reiserfs_bitmap_info structure from disk. 1192 * @sb - superblock for this filesystem 1193 * @bi - the bitmap info to be loaded. Requires that bi->bh is valid. 1194 * 1195 * This routine counts how many free bits there are, finding the first zero 1196 * as a side effect. Could also be implemented as a loop of test_bit() calls, or 1197 * a loop of find_first_zero_bit() calls. This implementation is similar to 1198 * find_first_zero_bit(), but doesn't return after it finds the first bit. 1199 * Should only be called on fs mount, but should be fairly efficient anyways. 1200 * 1201 * bi->first_zero_hint is considered unset if it == 0, since the bitmap itself 1202 * will * invariably occupt block 0 represented in the bitmap. The only 1203 * exception to this is when free_count also == 0, since there will be no 1204 * free blocks at all. 1205 */ 1206 1207 static void load_bitmap_info_data (struct super_block *sb, 1208 struct reiserfs_bitmap_info *bi) 1209 { 1210 unsigned long *cur = (unsigned long *)bi->bh->b_data; 1211 1212 while ((char *)cur < (bi->bh->b_data + sb->s_blocksize)) { 1213 1214 /* No need to scan if all 0's or all 1's. 1215 * Since we're only counting 0's, we can simply ignore all 1's */ 1216 if (*cur == 0) { 1217 if (bi->first_zero_hint == 0) { 1218 bi->first_zero_hint = ((char *)cur - bi->bh->b_data) << 3; 1219 } 1220 bi->free_count += sizeof(unsigned long)*8; 1221 } else if (*cur != ~0L) { 1222 int b; 1223 for (b = 0; b < sizeof(unsigned long)*8; b++) { 1224 if (!reiserfs_test_le_bit (b, cur)) { 1225 bi->free_count ++; 1226 if (bi->first_zero_hint == 0) 1227 bi->first_zero_hint = 1228 (((char *)cur - bi->bh->b_data) << 3) + b; 1229 } 1230 } 1231 } 1232 cur ++; 1233 } 1234 1235 #ifdef CONFIG_REISERFS_CHECK 1236 // This outputs a lot of unneded info on big FSes 1237 // reiserfs_warning ("bitmap loaded from block %d: %d free blocks", 1238 // bi->bh->b_blocknr, bi->free_count); 1239 #endif 1240 } 1241 1242 static int read_bitmaps (struct super_block * s) 1243 { 1244 int i, bmap_nr; 1245 1246 SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s)); 1247 if (SB_AP_BITMAP (s) == 0) 1248 return 1; 1249 memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s)); 1250 for (i = 0, bmap_nr = REISERFS_DISK_OFFSET_IN_BYTES / s->s_blocksize + 1; 1251 i < SB_BMAP_NR(s); i++, bmap_nr = s->s_blocksize * 8 * i) { 1252 SB_AP_BITMAP (s)[i].bh = sb_getblk(s, bmap_nr); 1253 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) 1254 ll_rw_block(READ, 1, &SB_AP_BITMAP(s)[i].bh); 1255 } 1256 for (i = 0; i < SB_BMAP_NR(s); i++) { 1257 wait_on_buffer(SB_AP_BITMAP (s)[i].bh); 1258 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) { 1259 reiserfs_warning(s,"sh-2029: reiserfs read_bitmaps: " 1260 "bitmap block (#%lu) reading failed", 1261 SB_AP_BITMAP(s)[i].bh->b_blocknr); 1262 for (i = 0; i < SB_BMAP_NR(s); i++) 1263 brelse(SB_AP_BITMAP(s)[i].bh); 1264 vfree(SB_AP_BITMAP(s)); 1265 SB_AP_BITMAP(s) = NULL; 1266 return 1; 1267 } 1268 load_bitmap_info_data (s, SB_AP_BITMAP (s) + i); 1269 } 1270 return 0; 1271 } 1272 1273 static int read_old_bitmaps (struct super_block * s) 1274 { 1275 int i ; 1276 struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK(s); 1277 int bmp1 = (REISERFS_OLD_DISK_OFFSET_IN_BYTES / s->s_blocksize) + 1; /* first of bitmap blocks */ 1278 1279 /* read true bitmap */ 1280 SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs)); 1281 if (SB_AP_BITMAP (s) == 0) 1282 return 1; 1283 1284 memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs)); 1285 1286 for (i = 0; i < sb_bmap_nr(rs); i ++) { 1287 SB_AP_BITMAP (s)[i].bh = sb_bread (s, bmp1 + i); 1288 if (!SB_AP_BITMAP (s)[i].bh) 1289 return 1; 1290 load_bitmap_info_data (s, SB_AP_BITMAP (s) + i); 1291 } 1292 1293 return 0; 1294 } 1295 1296 static int read_super_block (struct super_block * s, int offset) 1297 { 1298 struct buffer_head * bh; 1299 struct reiserfs_super_block * rs; 1300 int fs_blocksize; 1301 1302 1303 bh = sb_bread (s, offset / s->s_blocksize); 1304 if (!bh) { 1305 reiserfs_warning (s, "sh-2006: read_super_block: " 1306 "bread failed (dev %s, block %lu, size %lu)", 1307 reiserfs_bdevname (s), offset / s->s_blocksize, s->s_blocksize); 1308 return 1; 1309 } 1310 1311 rs = (struct reiserfs_super_block *)bh->b_data; 1312 if (!is_any_reiserfs_magic_string (rs)) { 1313 brelse (bh); 1314 return 1; 1315 } 1316 1317 // 1318 // ok, reiserfs signature (old or new) found in at the given offset 1319 // 1320 fs_blocksize = sb_blocksize(rs); 1321 brelse (bh); 1322 sb_set_blocksize (s, fs_blocksize); 1323 1324 bh = sb_bread (s, offset / s->s_blocksize); 1325 if (!bh) { 1326 reiserfs_warning (s, "sh-2007: read_super_block: " 1327 "bread failed (dev %s, block %lu, size %lu)\n", 1328 reiserfs_bdevname (s), offset / s->s_blocksize, s->s_blocksize); 1329 return 1; 1330 } 1331 1332 rs = (struct reiserfs_super_block *)bh->b_data; 1333 if (sb_blocksize(rs) != s->s_blocksize) { 1334 reiserfs_warning (s, "sh-2011: read_super_block: " 1335 "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n", 1336 reiserfs_bdevname (s), (unsigned long long)bh->b_blocknr, s->s_blocksize); 1337 brelse (bh); 1338 return 1; 1339 } 1340 1341 if ( rs->s_v1.s_root_block == cpu_to_le32(-1) ) { 1342 brelse(bh) ; 1343 reiserfs_warning (s, "Unfinished reiserfsck --rebuild-tree run detected. Please run\n" 1344 "reiserfsck --rebuild-tree and wait for a completion. If that fails\n" 1345 "get newer reiserfsprogs package"); 1346 return 1; 1347 } 1348 1349 SB_BUFFER_WITH_SB (s) = bh; 1350 SB_DISK_SUPER_BLOCK (s) = rs; 1351 1352 if (is_reiserfs_jr (rs)) { 1353 /* magic is of non-standard journal filesystem, look at s_version to 1354 find which format is in use */ 1355 if (sb_version(rs) == REISERFS_VERSION_2) 1356 reiserfs_warning (s, "read_super_block: found reiserfs format \"3.6\"" 1357 " with non-standard journal"); 1358 else if (sb_version(rs) == REISERFS_VERSION_1) 1359 reiserfs_warning (s, "read_super_block: found reiserfs format \"3.5\"" 1360 " with non-standard journal"); 1361 else { 1362 reiserfs_warning (s, "sh-2012: read_super_block: found unknown " 1363 "format \"%u\" of reiserfs with non-standard magic", 1364 sb_version(rs)); 1365 return 1; 1366 } 1367 } 1368 else 1369 /* s_version of standard format may contain incorrect information, 1370 so we just look at the magic string */ 1371 reiserfs_info (s, "found reiserfs format \"%s\" with standard journal\n", 1372 is_reiserfs_3_5 (rs) ? "3.5" : "3.6"); 1373 1374 s->s_op = &reiserfs_sops; 1375 s->s_export_op = &reiserfs_export_ops; 1376 #ifdef CONFIG_QUOTA 1377 s->s_qcop = &reiserfs_qctl_operations; 1378 s->dq_op = &reiserfs_quota_operations; 1379 #endif 1380 1381 /* new format is limited by the 32 bit wide i_blocks field, want to 1382 ** be one full block below that. 1383 */ 1384 s->s_maxbytes = (512LL << 32) - s->s_blocksize ; 1385 return 0; 1386 } 1387 1388 1389 1390 /* after journal replay, reread all bitmap and super blocks */ 1391 static int reread_meta_blocks(struct super_block *s) { 1392 int i ; 1393 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s))) ; 1394 wait_on_buffer(SB_BUFFER_WITH_SB(s)) ; 1395 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) { 1396 reiserfs_warning (s, "reread_meta_blocks, error reading the super") ; 1397 return 1 ; 1398 } 1399 1400 for (i = 0; i < SB_BMAP_NR(s) ; i++) { 1401 ll_rw_block(READ, 1, &(SB_AP_BITMAP(s)[i].bh)) ; 1402 wait_on_buffer(SB_AP_BITMAP(s)[i].bh) ; 1403 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) { 1404 reiserfs_warning (s, "reread_meta_blocks, error reading bitmap block number %d at %llu", 1405 i, (unsigned long long)SB_AP_BITMAP(s)[i].bh->b_blocknr) ; 1406 return 1 ; 1407 } 1408 } 1409 return 0 ; 1410 1411 } 1412 1413 1414 ///////////////////////////////////////////////////// 1415 // hash detection stuff 1416 1417 1418 // if root directory is empty - we set default - Yura's - hash and 1419 // warn about it 1420 // FIXME: we look for only one name in a directory. If tea and yura 1421 // bith have the same value - we ask user to send report to the 1422 // mailing list 1423 static __u32 find_hash_out (struct super_block * s) 1424 { 1425 int retval; 1426 struct inode * inode; 1427 struct cpu_key key; 1428 INITIALIZE_PATH (path); 1429 struct reiserfs_dir_entry de; 1430 __u32 hash = DEFAULT_HASH; 1431 1432 inode = s->s_root->d_inode; 1433 1434 do { // Some serious "goto"-hater was there ;) 1435 u32 teahash, r5hash, yurahash; 1436 1437 make_cpu_key (&key, inode, ~0, TYPE_DIRENTRY, 3); 1438 retval = search_by_entry_key (s, &key, &path, &de); 1439 if (retval == IO_ERROR) { 1440 pathrelse (&path); 1441 return UNSET_HASH ; 1442 } 1443 if (retval == NAME_NOT_FOUND) 1444 de.de_entry_num --; 1445 set_de_name_and_namelen (&de); 1446 if (deh_offset( &(de.de_deh[de.de_entry_num]) ) == DOT_DOT_OFFSET) { 1447 /* allow override in this case */ 1448 if (reiserfs_rupasov_hash(s)) { 1449 hash = YURA_HASH ; 1450 } 1451 reiserfs_warning(s,"FS seems to be empty, autodetect " 1452 "is using the default hash"); 1453 break; 1454 } 1455 r5hash=GET_HASH_VALUE (r5_hash (de.de_name, de.de_namelen)); 1456 teahash=GET_HASH_VALUE (keyed_hash (de.de_name, de.de_namelen)); 1457 yurahash=GET_HASH_VALUE (yura_hash (de.de_name, de.de_namelen)); 1458 if ( ( (teahash == r5hash) && (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) ) || 1459 ( (teahash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) || 1460 ( (r5hash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) ) { 1461 reiserfs_warning(s,"Unable to automatically detect hash function. " 1462 "Please mount with -o hash={tea,rupasov,r5}", 1463 reiserfs_bdevname (s)); 1464 hash = UNSET_HASH; 1465 break; 1466 } 1467 if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == yurahash) 1468 hash = YURA_HASH; 1469 else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == teahash) 1470 hash = TEA_HASH; 1471 else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == r5hash) 1472 hash = R5_HASH; 1473 else { 1474 reiserfs_warning (s,"Unrecognised hash function"); 1475 hash = UNSET_HASH; 1476 } 1477 } while (0); 1478 1479 pathrelse (&path); 1480 return hash; 1481 } 1482 1483 // finds out which hash names are sorted with 1484 static int what_hash (struct super_block * s) 1485 { 1486 __u32 code; 1487 1488 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); 1489 1490 /* reiserfs_hash_detect() == true if any of the hash mount options 1491 ** were used. We must check them to make sure the user isn't 1492 ** using a bad hash value 1493 */ 1494 if (code == UNSET_HASH || reiserfs_hash_detect(s)) 1495 code = find_hash_out (s); 1496 1497 if (code != UNSET_HASH && reiserfs_hash_detect(s)) { 1498 /* detection has found the hash, and we must check against the 1499 ** mount options 1500 */ 1501 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { 1502 reiserfs_warning (s, "Error, %s hash detected, " 1503 "unable to force rupasov hash", reiserfs_hashname(code)) ; 1504 code = UNSET_HASH ; 1505 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { 1506 reiserfs_warning (s, "Error, %s hash detected, " 1507 "unable to force tea hash", reiserfs_hashname(code)) ; 1508 code = UNSET_HASH ; 1509 } else if (reiserfs_r5_hash(s) && code != R5_HASH) { 1510 reiserfs_warning (s, "Error, %s hash detected, " 1511 "unable to force r5 hash", reiserfs_hashname(code)) ; 1512 code = UNSET_HASH ; 1513 } 1514 } else { 1515 /* find_hash_out was not called or could not determine the hash */ 1516 if (reiserfs_rupasov_hash(s)) { 1517 code = YURA_HASH ; 1518 } else if (reiserfs_tea_hash(s)) { 1519 code = TEA_HASH ; 1520 } else if (reiserfs_r5_hash(s)) { 1521 code = R5_HASH ; 1522 } 1523 } 1524 1525 /* if we are mounted RW, and we have a new valid hash code, update 1526 ** the super 1527 */ 1528 if (code != UNSET_HASH && 1529 !(s->s_flags & MS_RDONLY) && 1530 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { 1531 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); 1532 } 1533 return code; 1534 } 1535 1536 // return pointer to appropriate function 1537 static hashf_t hash_function (struct super_block * s) 1538 { 1539 switch (what_hash (s)) { 1540 case TEA_HASH: 1541 reiserfs_info (s, "Using tea hash to sort names\n"); 1542 return keyed_hash; 1543 case YURA_HASH: 1544 reiserfs_info (s, "Using rupasov hash to sort names\n"); 1545 return yura_hash; 1546 case R5_HASH: 1547 reiserfs_info (s, "Using r5 hash to sort names\n"); 1548 return r5_hash; 1549 } 1550 return NULL; 1551 } 1552 1553 // this is used to set up correct value for old partitions 1554 static int function2code (hashf_t func) 1555 { 1556 if (func == keyed_hash) 1557 return TEA_HASH; 1558 if (func == yura_hash) 1559 return YURA_HASH; 1560 if (func == r5_hash) 1561 return R5_HASH; 1562 1563 BUG() ; // should never happen 1564 1565 return 0; 1566 } 1567 1568 #define SWARN(silent, s, ...) \ 1569 if (!(silent)) \ 1570 reiserfs_warning (s, __VA_ARGS__) 1571 1572 static int reiserfs_fill_super (struct super_block * s, void * data, int silent) 1573 { 1574 struct inode *root_inode; 1575 int j; 1576 struct reiserfs_transaction_handle th ; 1577 int old_format = 0; 1578 unsigned long blocks; 1579 unsigned int commit_max_age = 0; 1580 int jinit_done = 0 ; 1581 struct reiserfs_iget_args args ; 1582 struct reiserfs_super_block * rs; 1583 char *jdev_name; 1584 struct reiserfs_sb_info *sbi; 1585 int errval = -EINVAL; 1586 1587 sbi = kmalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); 1588 if (!sbi) { 1589 errval = -ENOMEM; 1590 goto error; 1591 } 1592 s->s_fs_info = sbi; 1593 memset (sbi, 0, sizeof (struct reiserfs_sb_info)); 1594 /* Set default values for options: non-aggressive tails, RO on errors */ 1595 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL); 1596 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO); 1597 /* no preallocation minimum, be smart in 1598 reiserfs_file_write instead */ 1599 REISERFS_SB(s)->s_alloc_options.preallocmin = 0; 1600 /* Preallocate by 16 blocks (17-1) at once */ 1601 REISERFS_SB(s)->s_alloc_options.preallocsize = 17; 1602 /* Initialize the rwsem for xattr dir */ 1603 init_rwsem(&REISERFS_SB(s)->xattr_dir_sem); 1604 1605 /* setup default block allocator options */ 1606 reiserfs_init_alloc_options(s); 1607 1608 jdev_name = NULL; 1609 if (reiserfs_parse_options (s, (char *) data, &(sbi->s_mount_opt), &blocks, &jdev_name, &commit_max_age) == 0) { 1610 goto error; 1611 } 1612 1613 if (blocks) { 1614 SWARN (silent, s, "jmacd-7: reiserfs_fill_super: resize option " 1615 "for remount only"); 1616 goto error; 1617 } 1618 1619 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */ 1620 if (!read_super_block (s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) 1621 old_format = 1; 1622 /* try new format (64-th 1k block), which can contain reiserfs super block */ 1623 else if (read_super_block (s, REISERFS_DISK_OFFSET_IN_BYTES)) { 1624 SWARN(silent, s, "sh-2021: reiserfs_fill_super: can not find reiserfs on %s", reiserfs_bdevname (s)); 1625 goto error; 1626 } 1627 1628 rs = SB_DISK_SUPER_BLOCK (s); 1629 /* Let's do basic sanity check to verify that underlying device is not 1630 smaller than the filesystem. If the check fails then abort and scream, 1631 because bad stuff will happen otherwise. */ 1632 if ( s->s_bdev && s->s_bdev->bd_inode && i_size_read(s->s_bdev->bd_inode) < sb_block_count(rs)*sb_blocksize(rs)) { 1633 SWARN (silent, s, "Filesystem on %s cannot be mounted because it is bigger than the device", reiserfs_bdevname(s)); 1634 SWARN(silent, s, "You may need to run fsck or increase size of your LVM partition"); 1635 SWARN(silent, s, "Or may be you forgot to reboot after fdisk when it told you to"); 1636 goto error; 1637 } 1638 1639 sbi->s_mount_state = SB_REISERFS_STATE(s); 1640 sbi->s_mount_state = REISERFS_VALID_FS ; 1641 1642 if (old_format ? read_old_bitmaps(s) : read_bitmaps(s)) { 1643 SWARN(silent, s, "jmacd-8: reiserfs_fill_super: unable to read bitmap"); 1644 goto error; 1645 } 1646 #ifdef CONFIG_REISERFS_CHECK 1647 SWARN (silent, s, "CONFIG_REISERFS_CHECK is set ON"); 1648 SWARN (silent, s, "- it is slow mode for debugging."); 1649 #endif 1650 1651 /* make data=ordered the default */ 1652 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && 1653 !reiserfs_data_writeback(s)) 1654 { 1655 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); 1656 } 1657 1658 if (reiserfs_data_log(s)) { 1659 reiserfs_info (s, "using journaled data mode\n"); 1660 } else if (reiserfs_data_ordered(s)) { 1661 reiserfs_info (s, "using ordered data mode\n"); 1662 } else { 1663 reiserfs_info (s, "using writeback data mode\n"); 1664 } 1665 if (reiserfs_barrier_flush(s)) { 1666 printk("reiserfs: using flush barriers\n"); 1667 } 1668 1669 // set_device_ro(s->s_dev, 1) ; 1670 if( journal_init(s, jdev_name, old_format, commit_max_age) ) { 1671 SWARN(silent, s, "sh-2022: reiserfs_fill_super: unable to initialize journal space") ; 1672 goto error ; 1673 } else { 1674 jinit_done = 1 ; /* once this is set, journal_release must be called 1675 ** if we error out of the mount 1676 */ 1677 } 1678 if (reread_meta_blocks(s)) { 1679 SWARN(silent, s, "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init") ; 1680 goto error ; 1681 } 1682 1683 if (replay_only (s)) 1684 goto error; 1685 1686 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) { 1687 SWARN(silent, s, "clm-7000: Detected readonly device, marking FS readonly") ; 1688 s->s_flags |= MS_RDONLY ; 1689 } 1690 args.objectid = REISERFS_ROOT_OBJECTID ; 1691 args.dirid = REISERFS_ROOT_PARENT_OBJECTID ; 1692 root_inode = iget5_locked (s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, reiserfs_init_locked_inode, (void *)(&args)); 1693 if (!root_inode) { 1694 SWARN(silent, s, "jmacd-10: reiserfs_fill_super: get root inode failed"); 1695 goto error; 1696 } 1697 1698 if (root_inode->i_state & I_NEW) { 1699 reiserfs_read_locked_inode(root_inode, &args); 1700 unlock_new_inode(root_inode); 1701 } 1702 1703 s->s_root = d_alloc_root(root_inode); 1704 if (!s->s_root) { 1705 iput(root_inode); 1706 goto error; 1707 } 1708 1709 // define and initialize hash function 1710 sbi->s_hash_function = hash_function (s); 1711 if (sbi->s_hash_function == NULL) { 1712 dput(s->s_root) ; 1713 s->s_root = NULL ; 1714 goto error ; 1715 } 1716 1717 if (is_reiserfs_3_5 (rs) || (is_reiserfs_jr (rs) && SB_VERSION (s) == REISERFS_VERSION_1)) 1718 set_bit(REISERFS_3_5, &(sbi->s_properties)); 1719 else 1720 set_bit(REISERFS_3_6, &(sbi->s_properties)); 1721 1722 if (!(s->s_flags & MS_RDONLY)) { 1723 1724 errval = journal_begin(&th, s, 1) ; 1725 if (errval) { 1726 dput (s->s_root); 1727 s->s_root = NULL; 1728 goto error; 1729 } 1730 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ; 1731 1732 set_sb_umount_state( rs, REISERFS_ERROR_FS ); 1733 set_sb_fs_state (rs, 0); 1734 1735 if (old_format_only(s)) { 1736 /* filesystem of format 3.5 either with standard or non-standard 1737 journal */ 1738 if (convert_reiserfs (s)) { 1739 /* and -o conv is given */ 1740 if(!silent) 1741 reiserfs_info (s,"converting 3.5 filesystem to the 3.6 format") ; 1742 1743 if (is_reiserfs_3_5 (rs)) 1744 /* put magic string of 3.6 format. 2.2 will not be able to 1745 mount this filesystem anymore */ 1746 memcpy (rs->s_v1.s_magic, reiserfs_3_6_magic_string, 1747 sizeof (reiserfs_3_6_magic_string)); 1748 1749 set_sb_version(rs,REISERFS_VERSION_2); 1750 reiserfs_convert_objectid_map_v1(s) ; 1751 set_bit(REISERFS_3_6, &(sbi->s_properties)); 1752 clear_bit(REISERFS_3_5, &(sbi->s_properties)); 1753 } else if (!silent){ 1754 reiserfs_info (s, "using 3.5.x disk format\n") ; 1755 } 1756 } 1757 1758 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s)); 1759 errval = journal_end(&th, s, 1) ; 1760 if (errval) { 1761 dput (s->s_root); 1762 s->s_root = NULL; 1763 goto error; 1764 } 1765 1766 if ((errval = reiserfs_xattr_init (s, s->s_flags))) { 1767 dput (s->s_root); 1768 s->s_root = NULL; 1769 goto error; 1770 } 1771 1772 /* look for files which were to be removed in previous session */ 1773 finish_unfinished (s); 1774 } else { 1775 if ( old_format_only(s) && !silent) { 1776 reiserfs_info (s, "using 3.5.x disk format\n") ; 1777 } 1778 1779 if ((errval = reiserfs_xattr_init (s, s->s_flags))) { 1780 dput (s->s_root); 1781 s->s_root = NULL; 1782 goto error; 1783 } 1784 } 1785 // mark hash in super block: it could be unset. overwrite should be ok 1786 set_sb_hash_function_code( rs, function2code(sbi->s_hash_function ) ); 1787 1788 handle_attrs( s ); 1789 1790 reiserfs_proc_info_init( s ); 1791 1792 init_waitqueue_head (&(sbi->s_wait)); 1793 spin_lock_init(&sbi->bitmap_lock); 1794 1795 return (0); 1796 1797 error: 1798 if (jinit_done) { /* kill the commit thread, free journal ram */ 1799 journal_release_error(NULL, s) ; 1800 } 1801 if (SB_DISK_SUPER_BLOCK (s)) { 1802 for (j = 0; j < SB_BMAP_NR (s); j ++) { 1803 if (SB_AP_BITMAP (s)) 1804 brelse (SB_AP_BITMAP (s)[j].bh); 1805 } 1806 if (SB_AP_BITMAP (s)) 1807 vfree (SB_AP_BITMAP (s)); 1808 } 1809 if (SB_BUFFER_WITH_SB (s)) 1810 brelse(SB_BUFFER_WITH_SB (s)); 1811 #ifdef CONFIG_QUOTA 1812 for (j = 0; j < MAXQUOTAS; j++) { 1813 if (sbi->s_qf_names[j]) 1814 kfree(sbi->s_qf_names[j]); 1815 } 1816 #endif 1817 if (sbi != NULL) { 1818 kfree(sbi); 1819 } 1820 1821 s->s_fs_info = NULL; 1822 return errval; 1823 } 1824 1825 1826 static int reiserfs_statfs (struct super_block * s, struct kstatfs * buf) 1827 { 1828 struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK (s); 1829 1830 buf->f_namelen = (REISERFS_MAX_NAME (s->s_blocksize)); 1831 buf->f_bfree = sb_free_blocks(rs); 1832 buf->f_bavail = buf->f_bfree; 1833 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; 1834 buf->f_bsize = s->s_blocksize; 1835 /* changed to accommodate gcc folks.*/ 1836 buf->f_type = REISERFS_SUPER_MAGIC; 1837 return 0; 1838 } 1839 1840 #ifdef CONFIG_QUOTA 1841 static int reiserfs_dquot_initialize(struct inode *inode, int type) 1842 { 1843 struct reiserfs_transaction_handle th; 1844 int ret; 1845 1846 /* We may create quota structure so we need to reserve enough blocks */ 1847 reiserfs_write_lock(inode->i_sb); 1848 journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS); 1849 ret = dquot_initialize(inode, type); 1850 journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS); 1851 reiserfs_write_unlock(inode->i_sb); 1852 return ret; 1853 } 1854 1855 static int reiserfs_dquot_drop(struct inode *inode) 1856 { 1857 struct reiserfs_transaction_handle th; 1858 int ret; 1859 1860 /* We may delete quota structure so we need to reserve enough blocks */ 1861 reiserfs_write_lock(inode->i_sb); 1862 journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS); 1863 ret = dquot_drop(inode); 1864 journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS); 1865 reiserfs_write_unlock(inode->i_sb); 1866 return ret; 1867 } 1868 1869 static int reiserfs_write_dquot(struct dquot *dquot) 1870 { 1871 struct reiserfs_transaction_handle th; 1872 int ret; 1873 1874 reiserfs_write_lock(dquot->dq_sb); 1875 journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS); 1876 ret = dquot_commit(dquot); 1877 journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS); 1878 reiserfs_write_unlock(dquot->dq_sb); 1879 return ret; 1880 } 1881 1882 static int reiserfs_acquire_dquot(struct dquot *dquot) 1883 { 1884 struct reiserfs_transaction_handle th; 1885 int ret; 1886 1887 reiserfs_write_lock(dquot->dq_sb); 1888 journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS); 1889 ret = dquot_acquire(dquot); 1890 journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS); 1891 reiserfs_write_unlock(dquot->dq_sb); 1892 return ret; 1893 } 1894 1895 static int reiserfs_release_dquot(struct dquot *dquot) 1896 { 1897 struct reiserfs_transaction_handle th; 1898 int ret; 1899 1900 reiserfs_write_lock(dquot->dq_sb); 1901 journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS); 1902 ret = dquot_release(dquot); 1903 journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS); 1904 reiserfs_write_unlock(dquot->dq_sb); 1905 return ret; 1906 } 1907 1908 static int reiserfs_mark_dquot_dirty(struct dquot *dquot) 1909 { 1910 /* Are we journalling quotas? */ 1911 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 1912 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 1913 dquot_mark_dquot_dirty(dquot); 1914 return reiserfs_write_dquot(dquot); 1915 } 1916 else 1917 return dquot_mark_dquot_dirty(dquot); 1918 } 1919 1920 static int reiserfs_write_info(struct super_block *sb, int type) 1921 { 1922 struct reiserfs_transaction_handle th; 1923 int ret; 1924 1925 /* Data block + inode block */ 1926 reiserfs_write_lock(sb); 1927 journal_begin(&th, sb, 2); 1928 ret = dquot_commit_info(sb, type); 1929 journal_end(&th, sb, 2); 1930 reiserfs_write_unlock(sb); 1931 return ret; 1932 } 1933 1934 /* 1935 * Turn on quotas during mount time - we need to find 1936 * the quota file and such... 1937 */ 1938 static int reiserfs_quota_on_mount(struct super_block *sb, int type) 1939 { 1940 int err; 1941 struct dentry *dentry; 1942 struct qstr name = { .name = REISERFS_SB(sb)->s_qf_names[type], 1943 .hash = 0, 1944 .len = strlen(REISERFS_SB(sb)->s_qf_names[type])}; 1945 1946 dentry = lookup_hash(&name, sb->s_root); 1947 if (IS_ERR(dentry)) 1948 return PTR_ERR(dentry); 1949 err = vfs_quota_on_mount(type, REISERFS_SB(sb)->s_jquota_fmt, dentry); 1950 /* Now invalidate and put the dentry - quota got its own reference 1951 * to inode and dentry has at least wrong hash so we had better 1952 * throw it away */ 1953 d_invalidate(dentry); 1954 dput(dentry); 1955 return err; 1956 } 1957 1958 /* 1959 * Standard function to be called on quota_on 1960 */ 1961 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, char *path) 1962 { 1963 int err; 1964 struct nameidata nd; 1965 1966 err = path_lookup(path, LOOKUP_FOLLOW, &nd); 1967 if (err) 1968 return err; 1969 /* Quotafile not on the same filesystem? */ 1970 if (nd.mnt->mnt_sb != sb) { 1971 path_release(&nd); 1972 return -EXDEV; 1973 } 1974 /* We must not pack tails for quota files on reiserfs for quota IO to work */ 1975 if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) { 1976 reiserfs_warning(sb, "reiserfs: Quota file must have tail packing disabled."); 1977 path_release(&nd); 1978 return -EINVAL; 1979 } 1980 /* Not journalling quota? No more tests needed... */ 1981 if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] && 1982 !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) { 1983 path_release(&nd); 1984 return vfs_quota_on(sb, type, format_id, path); 1985 } 1986 /* Quotafile not of fs root? */ 1987 if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode) 1988 reiserfs_warning(sb, "reiserfs: Quota file not on filesystem root. " 1989 "Journalled quota will not work."); 1990 path_release(&nd); 1991 return vfs_quota_on(sb, type, format_id, path); 1992 } 1993 1994 /* Read data from quotafile - avoid pagecache and such because we cannot afford 1995 * acquiring the locks... As quota files are never truncated and quota code 1996 * itself serializes the operations (and noone else should touch the files) 1997 * we don't have to be afraid of races */ 1998 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, 1999 size_t len, loff_t off) 2000 { 2001 struct inode *inode = sb_dqopt(sb)->files[type]; 2002 unsigned long blk = off >> sb->s_blocksize_bits; 2003 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; 2004 size_t toread; 2005 struct buffer_head tmp_bh, *bh; 2006 loff_t i_size = i_size_read(inode); 2007 2008 if (off > i_size) 2009 return 0; 2010 if (off+len > i_size) 2011 len = i_size-off; 2012 toread = len; 2013 while (toread > 0) { 2014 tocopy = sb->s_blocksize - offset < toread ? sb->s_blocksize - offset : toread; 2015 tmp_bh.b_state = 0; 2016 /* Quota files are without tails so we can safely use this function */ 2017 reiserfs_write_lock(sb); 2018 err = reiserfs_get_block(inode, blk, &tmp_bh, 0); 2019 reiserfs_write_unlock(sb); 2020 if (err) 2021 return err; 2022 if (!buffer_mapped(&tmp_bh)) /* A hole? */ 2023 memset(data, 0, tocopy); 2024 else { 2025 bh = sb_bread(sb, tmp_bh.b_blocknr); 2026 if (!bh) 2027 return -EIO; 2028 memcpy(data, bh->b_data+offset, tocopy); 2029 brelse(bh); 2030 } 2031 offset = 0; 2032 toread -= tocopy; 2033 data += tocopy; 2034 blk++; 2035 } 2036 return len; 2037 } 2038 2039 /* Write to quotafile (we know the transaction is already started and has 2040 * enough credits) */ 2041 static ssize_t reiserfs_quota_write(struct super_block *sb, int type, 2042 const char *data, size_t len, loff_t off) 2043 { 2044 struct inode *inode = sb_dqopt(sb)->files[type]; 2045 unsigned long blk = off >> sb->s_blocksize_bits; 2046 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; 2047 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; 2048 size_t towrite = len; 2049 struct buffer_head tmp_bh, *bh; 2050 2051 down(&inode->i_sem); 2052 while (towrite > 0) { 2053 tocopy = sb->s_blocksize - offset < towrite ? 2054 sb->s_blocksize - offset : towrite; 2055 tmp_bh.b_state = 0; 2056 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); 2057 if (err) 2058 goto out; 2059 if (offset || tocopy != sb->s_blocksize) 2060 bh = sb_bread(sb, tmp_bh.b_blocknr); 2061 else 2062 bh = sb_getblk(sb, tmp_bh.b_blocknr); 2063 if (!bh) { 2064 err = -EIO; 2065 goto out; 2066 } 2067 lock_buffer(bh); 2068 memcpy(bh->b_data+offset, data, tocopy); 2069 flush_dcache_page(bh->b_page); 2070 set_buffer_uptodate(bh); 2071 unlock_buffer(bh); 2072 reiserfs_prepare_for_journal(sb, bh, 1); 2073 journal_mark_dirty(current->journal_info, sb, bh); 2074 if (!journal_quota) 2075 reiserfs_add_ordered_list(inode, bh); 2076 brelse(bh); 2077 offset = 0; 2078 towrite -= tocopy; 2079 data += tocopy; 2080 blk++; 2081 } 2082 out: 2083 if (len == towrite) 2084 return err; 2085 if (inode->i_size < off+len-towrite) 2086 i_size_write(inode, off+len-towrite); 2087 inode->i_version++; 2088 inode->i_mtime = inode->i_ctime = CURRENT_TIME; 2089 mark_inode_dirty(inode); 2090 up(&inode->i_sem); 2091 return len - towrite; 2092 } 2093 2094 #endif 2095 2096 static struct super_block* 2097 get_super_block (struct file_system_type *fs_type, int flags, 2098 const char *dev_name, void *data) 2099 { 2100 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super); 2101 } 2102 2103 static int __init 2104 init_reiserfs_fs ( void ) 2105 { 2106 int ret; 2107 2108 if ((ret = init_inodecache ())) { 2109 return ret; 2110 } 2111 2112 if ((ret = reiserfs_xattr_register_handlers ())) 2113 goto failed_reiserfs_xattr_register_handlers; 2114 2115 reiserfs_proc_info_global_init (); 2116 reiserfs_proc_register_global ("version", reiserfs_global_version_in_proc); 2117 2118 ret = register_filesystem (& reiserfs_fs_type); 2119 2120 if (ret == 0) { 2121 return 0; 2122 } 2123 2124 reiserfs_xattr_unregister_handlers (); 2125 2126 failed_reiserfs_xattr_register_handlers: 2127 reiserfs_proc_unregister_global ("version"); 2128 reiserfs_proc_info_global_done (); 2129 destroy_inodecache (); 2130 2131 return ret; 2132 } 2133 2134 static void __exit 2135 exit_reiserfs_fs ( void ) 2136 { 2137 reiserfs_xattr_unregister_handlers (); 2138 reiserfs_proc_unregister_global ("version"); 2139 reiserfs_proc_info_global_done (); 2140 unregister_filesystem (& reiserfs_fs_type); 2141 destroy_inodecache (); 2142 } 2143 2144 struct file_system_type reiserfs_fs_type = { 2145 .owner = THIS_MODULE, 2146 .name = "reiserfs", 2147 .get_sb = get_super_block, 2148 .kill_sb = kill_block_super, 2149 .fs_flags = FS_REQUIRES_DEV, 2150 }; 2151 2152 MODULE_DESCRIPTION ("ReiserFS journaled filesystem"); 2153 MODULE_AUTHOR ("Hans Reiser <reiser@namesys.com>"); 2154 MODULE_LICENSE ("GPL"); 2155 2156 module_init (init_reiserfs_fs); 2157 module_exit (exit_reiserfs_fs); 2158