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 reiserfs_key MAX_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 = MAX_KEY; 168 max_cpu_key.key_length = 3; 169 170 #ifdef CONFIG_QUOTA 171 /* Needed for iput() to work correctly and not trash data */ 172 if (s->s_flags & MS_ACTIVE) { 173 ms_active_set = 0; 174 } else { 175 ms_active_set = 1; 176 s->s_flags |= MS_ACTIVE; 177 } 178 /* Turn on quotas so that they are updated correctly */ 179 for (i = 0; i < MAXQUOTAS; i++) { 180 if (REISERFS_SB(s)->s_qf_names[i]) { 181 int ret = reiserfs_quota_on_mount(s, i); 182 if (ret < 0) 183 reiserfs_warning(s, "reiserfs: cannot turn on journalled quota: error %d", ret); 184 } 185 } 186 #endif 187 188 done = 0; 189 REISERFS_SB(s)->s_is_unlinked_ok = 1; 190 while (!retval) { 191 retval = search_item (s, &max_cpu_key, &path); 192 if (retval != ITEM_NOT_FOUND) { 193 reiserfs_warning (s, "vs-2140: finish_unfinished: search_by_key returned %d", 194 retval); 195 break; 196 } 197 198 bh = get_last_bh (&path); 199 item_pos = get_item_pos (&path); 200 if (item_pos != B_NR_ITEMS (bh)) { 201 reiserfs_warning (s, "vs-2060: finish_unfinished: wrong position found"); 202 break; 203 } 204 item_pos --; 205 ih = B_N_PITEM_HEAD (bh, item_pos); 206 207 if (le32_to_cpu (ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) 208 /* there are no "save" links anymore */ 209 break; 210 211 save_link_key = ih->ih_key; 212 if (is_indirect_le_ih (ih)) 213 truncate = 1; 214 else 215 truncate = 0; 216 217 /* reiserfs_iget needs k_dirid and k_objectid only */ 218 item = B_I_PITEM (bh, ih); 219 obj_key.on_disk_key.k_dir_id = le32_to_cpu (*(__u32 *)item); 220 obj_key.on_disk_key.k_objectid = le32_to_cpu (ih->ih_key.k_objectid); 221 obj_key.on_disk_key.u.k_offset_v1.k_offset = 0; 222 obj_key.on_disk_key.u.k_offset_v1.k_uniqueness = 0; 223 224 pathrelse (&path); 225 226 inode = reiserfs_iget (s, &obj_key); 227 if (!inode) { 228 /* the unlink almost completed, it just did not manage to remove 229 "save" link and release objectid */ 230 reiserfs_warning (s, "vs-2180: finish_unfinished: iget failed for %K", 231 &obj_key); 232 retval = remove_save_link_only (s, &save_link_key, 1); 233 continue; 234 } 235 236 if (!truncate && inode->i_nlink) { 237 /* file is not unlinked */ 238 reiserfs_warning (s, "vs-2185: finish_unfinished: file %K is not unlinked", 239 &obj_key); 240 retval = remove_save_link_only (s, &save_link_key, 0); 241 continue; 242 } 243 DQUOT_INIT(inode); 244 245 if (truncate && S_ISDIR (inode->i_mode) ) { 246 /* We got a truncate request for a dir which is impossible. 247 The only imaginable way is to execute unfinished truncate request 248 then boot into old kernel, remove the file and create dir with 249 the same key. */ 250 reiserfs_warning(s, "green-2101: impossible truncate on a directory %k. Please report", INODE_PKEY (inode)); 251 retval = remove_save_link_only (s, &save_link_key, 0); 252 truncate = 0; 253 iput (inode); 254 continue; 255 } 256 257 if (truncate) { 258 REISERFS_I(inode) -> i_flags |= i_link_saved_truncate_mask; 259 /* not completed truncate found. New size was committed together 260 with "save" link */ 261 reiserfs_info (s, "Truncating %k to %Ld ..", 262 INODE_PKEY (inode), inode->i_size); 263 reiserfs_truncate_file (inode, 0/*don't update modification time*/); 264 retval = remove_save_link (inode, truncate); 265 } else { 266 REISERFS_I(inode) -> i_flags |= i_link_saved_unlink_mask; 267 /* not completed unlink (rmdir) found */ 268 reiserfs_info (s, "Removing %k..", INODE_PKEY (inode)); 269 /* removal gets completed in iput */ 270 retval = 0; 271 } 272 273 iput (inode); 274 printk ("done\n"); 275 done ++; 276 } 277 REISERFS_SB(s)->s_is_unlinked_ok = 0; 278 279 #ifdef CONFIG_QUOTA 280 /* Turn quotas off */ 281 for (i = 0; i < MAXQUOTAS; i++) { 282 if (sb_dqopt(s)->files[i]) 283 vfs_quota_off_mount(s, i); 284 } 285 if (ms_active_set) 286 /* Restore the flag back */ 287 s->s_flags &= ~MS_ACTIVE; 288 #endif 289 pathrelse (&path); 290 if (done) 291 reiserfs_info (s, "There were %d uncompleted unlinks/truncates. " 292 "Completed\n", done); 293 return retval; 294 } 295 296 /* to protect file being unlinked from getting lost we "safe" link files 297 being unlinked. This link will be deleted in the same transaction with last 298 item of file. mounting the filesytem we scan all these links and remove 299 files which almost got lost */ 300 void add_save_link (struct reiserfs_transaction_handle * th, 301 struct inode * inode, int truncate) 302 { 303 INITIALIZE_PATH (path); 304 int retval; 305 struct cpu_key key; 306 struct item_head ih; 307 __u32 link; 308 309 BUG_ON (!th->t_trans_id); 310 311 /* file can only get one "save link" of each kind */ 312 RFALSE( truncate && 313 ( REISERFS_I(inode) -> i_flags & i_link_saved_truncate_mask ), 314 "saved link already exists for truncated inode %lx", 315 ( long ) inode -> i_ino ); 316 RFALSE( !truncate && 317 ( REISERFS_I(inode) -> i_flags & i_link_saved_unlink_mask ), 318 "saved link already exists for unlinked inode %lx", 319 ( long ) inode -> i_ino ); 320 321 /* setup key of "save" link */ 322 key.version = KEY_FORMAT_3_5; 323 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; 324 key.on_disk_key.k_objectid = inode->i_ino; 325 if (!truncate) { 326 /* unlink, rmdir, rename */ 327 set_cpu_key_k_offset (&key, 1 + inode->i_sb->s_blocksize); 328 set_cpu_key_k_type (&key, TYPE_DIRECT); 329 330 /* item head of "safe" link */ 331 make_le_item_head (&ih, &key, key.version, 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, 332 4/*length*/, 0xffff/*free space*/); 333 } else { 334 /* truncate */ 335 if (S_ISDIR (inode->i_mode)) 336 reiserfs_warning(inode->i_sb, "green-2102: Adding a truncate savelink for a directory %k! Please report", INODE_PKEY(inode)); 337 set_cpu_key_k_offset (&key, 1); 338 set_cpu_key_k_type (&key, TYPE_INDIRECT); 339 340 /* item head of "safe" link */ 341 make_le_item_head (&ih, &key, key.version, 1, TYPE_INDIRECT, 342 4/*length*/, 0/*free space*/); 343 } 344 key.key_length = 3; 345 346 /* look for its place in the tree */ 347 retval = search_item (inode->i_sb, &key, &path); 348 if (retval != ITEM_NOT_FOUND) { 349 if ( retval != -ENOSPC ) 350 reiserfs_warning (inode->i_sb, "vs-2100: add_save_link:" 351 "search_by_key (%K) returned %d", &key, retval); 352 pathrelse (&path); 353 return; 354 } 355 356 /* body of "save" link */ 357 link = INODE_PKEY (inode)->k_dir_id; 358 359 /* put "save" link inot tree, don't charge quota to anyone */ 360 retval = reiserfs_insert_item (th, &path, &key, &ih, NULL, (char *)&link); 361 if (retval) { 362 if (retval != -ENOSPC) 363 reiserfs_warning (inode->i_sb, "vs-2120: add_save_link: insert_item returned %d", 364 retval); 365 } else { 366 if( truncate ) 367 REISERFS_I(inode) -> i_flags |= i_link_saved_truncate_mask; 368 else 369 REISERFS_I(inode) -> i_flags |= i_link_saved_unlink_mask; 370 } 371 } 372 373 374 /* this opens transaction unlike add_save_link */ 375 int remove_save_link (struct inode * inode, int truncate) 376 { 377 struct reiserfs_transaction_handle th; 378 struct reiserfs_key key; 379 int err; 380 381 /* we are going to do one balancing only */ 382 err = journal_begin (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); 383 if (err) 384 return err; 385 386 /* setup key of "save" link */ 387 key.k_dir_id = cpu_to_le32 (MAX_KEY_OBJECTID); 388 key.k_objectid = INODE_PKEY (inode)->k_objectid; 389 if (!truncate) { 390 /* unlink, rmdir, rename */ 391 set_le_key_k_offset (KEY_FORMAT_3_5, &key, 392 1 + inode->i_sb->s_blocksize); 393 set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_DIRECT); 394 } else { 395 /* truncate */ 396 set_le_key_k_offset (KEY_FORMAT_3_5, &key, 1); 397 set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_INDIRECT); 398 } 399 400 if( ( truncate && 401 ( REISERFS_I(inode) -> i_flags & i_link_saved_truncate_mask ) ) || 402 ( !truncate && 403 ( REISERFS_I(inode) -> i_flags & i_link_saved_unlink_mask ) ) ) 404 /* don't take quota bytes from anywhere */ 405 reiserfs_delete_solid_item (&th, NULL, &key); 406 if (!truncate) { 407 reiserfs_release_objectid (&th, inode->i_ino); 408 REISERFS_I(inode) -> i_flags &= ~i_link_saved_unlink_mask; 409 } else 410 REISERFS_I(inode) -> i_flags &= ~i_link_saved_truncate_mask; 411 412 return journal_end (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); 413 } 414 415 416 static void reiserfs_put_super (struct super_block * s) 417 { 418 int i; 419 struct reiserfs_transaction_handle th ; 420 th.t_trans_id = 0; 421 422 if (REISERFS_SB(s)->xattr_root) { 423 d_invalidate (REISERFS_SB(s)->xattr_root); 424 dput (REISERFS_SB(s)->xattr_root); 425 } 426 427 if (REISERFS_SB(s)->priv_root) { 428 d_invalidate (REISERFS_SB(s)->priv_root); 429 dput (REISERFS_SB(s)->priv_root); 430 } 431 432 /* change file system state to current state if it was mounted with read-write permissions */ 433 if (!(s->s_flags & MS_RDONLY)) { 434 if (!journal_begin(&th, s, 10)) { 435 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ; 436 set_sb_umount_state( SB_DISK_SUPER_BLOCK(s), REISERFS_SB(s)->s_mount_state ); 437 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s)); 438 } 439 } 440 441 /* note, journal_release checks for readonly mount, and can decide not 442 ** to do a journal_end 443 */ 444 journal_release(&th, s) ; 445 446 for (i = 0; i < SB_BMAP_NR (s); i ++) 447 brelse (SB_AP_BITMAP (s)[i].bh); 448 449 vfree (SB_AP_BITMAP (s)); 450 451 brelse (SB_BUFFER_WITH_SB (s)); 452 453 print_statistics (s); 454 455 if (REISERFS_SB(s)->s_kmallocs != 0) { 456 reiserfs_warning (s, "vs-2004: reiserfs_put_super: allocated memory left %d", 457 REISERFS_SB(s)->s_kmallocs); 458 } 459 460 if (REISERFS_SB(s)->reserved_blocks != 0) { 461 reiserfs_warning (s, "green-2005: reiserfs_put_super: reserved blocks left %d", 462 REISERFS_SB(s)->reserved_blocks); 463 } 464 465 reiserfs_proc_info_done( s ); 466 467 kfree(s->s_fs_info); 468 s->s_fs_info = NULL; 469 470 return; 471 } 472 473 static kmem_cache_t * reiserfs_inode_cachep; 474 475 static struct inode *reiserfs_alloc_inode(struct super_block *sb) 476 { 477 struct reiserfs_inode_info *ei; 478 ei = (struct reiserfs_inode_info *)kmem_cache_alloc(reiserfs_inode_cachep, SLAB_KERNEL); 479 if (!ei) 480 return NULL; 481 return &ei->vfs_inode; 482 } 483 484 static void reiserfs_destroy_inode(struct inode *inode) 485 { 486 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); 487 } 488 489 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) 490 { 491 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *) foo; 492 493 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == 494 SLAB_CTOR_CONSTRUCTOR) { 495 INIT_LIST_HEAD(&ei->i_prealloc_list) ; 496 inode_init_once(&ei->vfs_inode); 497 ei->i_acl_access = NULL; 498 ei->i_acl_default = NULL; 499 } 500 } 501 502 static int init_inodecache(void) 503 { 504 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", 505 sizeof(struct reiserfs_inode_info), 506 0, SLAB_RECLAIM_ACCOUNT, 507 init_once, NULL); 508 if (reiserfs_inode_cachep == NULL) 509 return -ENOMEM; 510 return 0; 511 } 512 513 static void destroy_inodecache(void) 514 { 515 if (kmem_cache_destroy(reiserfs_inode_cachep)) 516 reiserfs_warning (NULL, "reiserfs_inode_cache: not all structures were freed"); 517 } 518 519 /* we don't mark inodes dirty, we just log them */ 520 static void reiserfs_dirty_inode (struct inode * inode) { 521 struct reiserfs_transaction_handle th ; 522 523 int err = 0; 524 if (inode->i_sb->s_flags & MS_RDONLY) { 525 reiserfs_warning(inode->i_sb, "clm-6006: writing inode %lu on readonly FS", 526 inode->i_ino) ; 527 return ; 528 } 529 reiserfs_write_lock(inode->i_sb); 530 531 /* this is really only used for atime updates, so they don't have 532 ** to be included in O_SYNC or fsync 533 */ 534 err = journal_begin(&th, inode->i_sb, 1) ; 535 if (err) { 536 reiserfs_write_unlock (inode->i_sb); 537 return; 538 } 539 reiserfs_update_sd (&th, inode); 540 journal_end(&th, inode->i_sb, 1) ; 541 reiserfs_write_unlock(inode->i_sb); 542 } 543 544 static void reiserfs_clear_inode (struct inode *inode) 545 { 546 struct posix_acl *acl; 547 548 acl = REISERFS_I(inode)->i_acl_access; 549 if (acl && !IS_ERR (acl)) 550 posix_acl_release (acl); 551 REISERFS_I(inode)->i_acl_access = NULL; 552 553 acl = REISERFS_I(inode)->i_acl_default; 554 if (acl && !IS_ERR (acl)) 555 posix_acl_release (acl); 556 REISERFS_I(inode)->i_acl_default = NULL; 557 } 558 559 #ifdef CONFIG_QUOTA 560 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, size_t, loff_t); 561 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, loff_t); 562 #endif 563 564 static struct super_operations reiserfs_sops = 565 { 566 .alloc_inode = reiserfs_alloc_inode, 567 .destroy_inode = reiserfs_destroy_inode, 568 .write_inode = reiserfs_write_inode, 569 .dirty_inode = reiserfs_dirty_inode, 570 .delete_inode = reiserfs_delete_inode, 571 .clear_inode = reiserfs_clear_inode, 572 .put_super = reiserfs_put_super, 573 .write_super = reiserfs_write_super, 574 .sync_fs = reiserfs_sync_fs, 575 .write_super_lockfs = reiserfs_write_super_lockfs, 576 .unlockfs = reiserfs_unlockfs, 577 .statfs = reiserfs_statfs, 578 .remount_fs = reiserfs_remount, 579 #ifdef CONFIG_QUOTA 580 .quota_read = reiserfs_quota_read, 581 .quota_write = reiserfs_quota_write, 582 #endif 583 }; 584 585 #ifdef CONFIG_QUOTA 586 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") 587 588 static int reiserfs_dquot_initialize(struct inode *, int); 589 static int reiserfs_dquot_drop(struct inode *); 590 static int reiserfs_write_dquot(struct dquot *); 591 static int reiserfs_acquire_dquot(struct dquot *); 592 static int reiserfs_release_dquot(struct dquot *); 593 static int reiserfs_mark_dquot_dirty(struct dquot *); 594 static int reiserfs_write_info(struct super_block *, int); 595 static int reiserfs_quota_on(struct super_block *, int, int, char *); 596 597 static struct dquot_operations reiserfs_quota_operations = 598 { 599 .initialize = reiserfs_dquot_initialize, 600 .drop = reiserfs_dquot_drop, 601 .alloc_space = dquot_alloc_space, 602 .alloc_inode = dquot_alloc_inode, 603 .free_space = dquot_free_space, 604 .free_inode = dquot_free_inode, 605 .transfer = dquot_transfer, 606 .write_dquot = reiserfs_write_dquot, 607 .acquire_dquot = reiserfs_acquire_dquot, 608 .release_dquot = reiserfs_release_dquot, 609 .mark_dirty = reiserfs_mark_dquot_dirty, 610 .write_info = reiserfs_write_info, 611 }; 612 613 static struct quotactl_ops reiserfs_qctl_operations = 614 { 615 .quota_on = reiserfs_quota_on, 616 .quota_off = vfs_quota_off, 617 .quota_sync = vfs_quota_sync, 618 .get_info = vfs_get_dqinfo, 619 .set_info = vfs_set_dqinfo, 620 .get_dqblk = vfs_get_dqblk, 621 .set_dqblk = vfs_set_dqblk, 622 }; 623 #endif 624 625 static struct export_operations reiserfs_export_ops = { 626 .encode_fh = reiserfs_encode_fh, 627 .decode_fh = reiserfs_decode_fh, 628 .get_parent = reiserfs_get_parent, 629 .get_dentry = reiserfs_get_dentry, 630 } ; 631 632 /* this struct is used in reiserfs_getopt () for containing the value for those 633 mount options that have values rather than being toggles. */ 634 typedef struct { 635 char * value; 636 int setmask; /* bitmask which is to set on mount_options bitmask when this 637 value is found, 0 is no bits are to be changed. */ 638 int clrmask; /* bitmask which is to clear on mount_options bitmask when this 639 value is found, 0 is no bits are to be changed. This is 640 applied BEFORE setmask */ 641 } arg_desc_t; 642 643 /* Set this bit in arg_required to allow empty arguments */ 644 #define REISERFS_OPT_ALLOWEMPTY 31 645 646 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs 647 mount options */ 648 typedef struct { 649 char * option_name; 650 int arg_required; /* 0 if argument is not required, not 0 otherwise */ 651 const arg_desc_t * values; /* list of values accepted by an option */ 652 int setmask; /* bitmask which is to set on mount_options bitmask when this 653 value is found, 0 is no bits are to be changed. */ 654 int clrmask; /* bitmask which is to clear on mount_options bitmask when this 655 value is found, 0 is no bits are to be changed. This is 656 applied BEFORE setmask */ 657 } opt_desc_t; 658 659 /* possible values for -o data= */ 660 static const arg_desc_t logging_mode[] = { 661 {"ordered", 1<<REISERFS_DATA_ORDERED, (1<<REISERFS_DATA_LOG|1<<REISERFS_DATA_WRITEBACK)}, 662 {"journal", 1<<REISERFS_DATA_LOG, (1<<REISERFS_DATA_ORDERED|1<<REISERFS_DATA_WRITEBACK)}, 663 {"writeback", 1<<REISERFS_DATA_WRITEBACK, (1<<REISERFS_DATA_ORDERED|1<<REISERFS_DATA_LOG)}, 664 {NULL, 0} 665 }; 666 667 /* possible values for -o barrier= */ 668 static const arg_desc_t barrier_mode[] = { 669 {"none", 1<<REISERFS_BARRIER_NONE, 1<<REISERFS_BARRIER_FLUSH}, 670 {"flush", 1<<REISERFS_BARRIER_FLUSH, 1<<REISERFS_BARRIER_NONE}, 671 {NULL, 0} 672 }; 673 674 /* possible values for "-o block-allocator=" and bits which are to be set in 675 s_mount_opt of reiserfs specific part of in-core super block */ 676 static const arg_desc_t balloc[] = { 677 {"noborder", 1<<REISERFS_NO_BORDER, 0}, 678 {"border", 0, 1<<REISERFS_NO_BORDER}, 679 {"no_unhashed_relocation", 1<<REISERFS_NO_UNHASHED_RELOCATION, 0}, 680 {"hashed_relocation", 1<<REISERFS_HASHED_RELOCATION, 0}, 681 {"test4", 1<<REISERFS_TEST4, 0}, 682 {"notest4", 0, 1<<REISERFS_TEST4}, 683 {NULL, 0, 0} 684 }; 685 686 static const arg_desc_t tails[] = { 687 {"on", 1<<REISERFS_LARGETAIL, 1<<REISERFS_SMALLTAIL}, 688 {"off", 0, (1<<REISERFS_LARGETAIL)|(1<<REISERFS_SMALLTAIL)}, 689 {"small", 1<<REISERFS_SMALLTAIL, 1<<REISERFS_LARGETAIL}, 690 {NULL, 0, 0} 691 }; 692 693 static const arg_desc_t error_actions[] = { 694 {"panic", 1 << REISERFS_ERROR_PANIC, 695 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, 696 {"ro-remount", 1 << REISERFS_ERROR_RO, 697 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, 698 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG 699 {"continue", 1 << REISERFS_ERROR_CONTINUE, 700 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, 701 #endif 702 {NULL, 0, 0}, 703 }; 704 705 int reiserfs_default_io_size = 128 * 1024; /* Default recommended I/O size is 128k. 706 There might be broken applications that are 707 confused by this. Use nolargeio mount option 708 to get usual i/o size = PAGE_SIZE. 709 */ 710 711 /* proceed only one option from a list *cur - string containing of mount options 712 opts - array of options which are accepted 713 opt_arg - if option is found and requires an argument and if it is specifed 714 in the input - pointer to the argument is stored here 715 bit_flags - if option requires to set a certain bit - it is set here 716 return -1 if unknown option is found, opt->arg_required otherwise */ 717 static int reiserfs_getopt ( struct super_block * s, char ** cur, opt_desc_t * opts, char ** opt_arg, 718 unsigned long * bit_flags) 719 { 720 char * p; 721 /* foo=bar, 722 ^ ^ ^ 723 | | +-- option_end 724 | +-- arg_start 725 +-- option_start 726 */ 727 const opt_desc_t * opt; 728 const arg_desc_t * arg; 729 730 731 p = *cur; 732 733 /* assume argument cannot contain commas */ 734 *cur = strchr (p, ','); 735 if (*cur) { 736 *(*cur) = '\0'; 737 (*cur) ++; 738 } 739 740 if ( !strncmp (p, "alloc=", 6) ) { 741 /* Ugly special case, probably we should redo options parser so that 742 it can understand several arguments for some options, also so that 743 it can fill several bitfields with option values. */ 744 if ( reiserfs_parse_alloc_options( s, p + 6) ) { 745 return -1; 746 } else { 747 return 0; 748 } 749 } 750 751 752 /* for every option in the list */ 753 for (opt = opts; opt->option_name; opt ++) { 754 if (!strncmp (p, opt->option_name, strlen (opt->option_name))) { 755 if (bit_flags) { 756 if (opt->clrmask == (1 << REISERFS_UNSUPPORTED_OPT)) 757 reiserfs_warning (s, "%s not supported.", p); 758 else 759 *bit_flags &= ~opt->clrmask; 760 if (opt->setmask == (1 << REISERFS_UNSUPPORTED_OPT)) 761 reiserfs_warning (s, "%s not supported.", p); 762 else 763 *bit_flags |= opt->setmask; 764 } 765 break; 766 } 767 } 768 if (!opt->option_name) { 769 reiserfs_warning (s, "unknown mount option \"%s\"", p); 770 return -1; 771 } 772 773 p += strlen (opt->option_name); 774 switch (*p) { 775 case '=': 776 if (!opt->arg_required) { 777 reiserfs_warning (s, "the option \"%s\" does not require an argument", 778 opt->option_name); 779 return -1; 780 } 781 break; 782 783 case 0: 784 if (opt->arg_required) { 785 reiserfs_warning (s, "the option \"%s\" requires an argument", opt->option_name); 786 return -1; 787 } 788 break; 789 default: 790 reiserfs_warning (s, "head of option \"%s\" is only correct", opt->option_name); 791 return -1; 792 } 793 794 /* move to the argument, or to next option if argument is not required */ 795 p ++; 796 797 if ( opt->arg_required && !(opt->arg_required & (1<<REISERFS_OPT_ALLOWEMPTY)) && !strlen (p) ) { 798 /* this catches "option=," if not allowed */ 799 reiserfs_warning (s, "empty argument for \"%s\"", opt->option_name); 800 return -1; 801 } 802 803 if (!opt->values) { 804 /* *=NULLopt_arg contains pointer to argument */ 805 *opt_arg = p; 806 return opt->arg_required & ~(1<<REISERFS_OPT_ALLOWEMPTY); 807 } 808 809 /* values possible for this option are listed in opt->values */ 810 for (arg = opt->values; arg->value; arg ++) { 811 if (!strcmp (p, arg->value)) { 812 if (bit_flags) { 813 *bit_flags &= ~arg->clrmask; 814 *bit_flags |= arg->setmask; 815 } 816 return opt->arg_required; 817 } 818 } 819 820 reiserfs_warning (s, "bad value \"%s\" for option \"%s\"", p, opt->option_name); 821 return -1; 822 } 823 824 /* returns 0 if something is wrong in option string, 1 - otherwise */ 825 static int reiserfs_parse_options (struct super_block * s, char * options, /* string given via mount's -o */ 826 unsigned long * mount_options, 827 /* after the parsing phase, contains the 828 collection of bitflags defining what 829 mount options were selected. */ 830 unsigned long * blocks, /* strtol-ed from NNN of resize=NNN */ 831 char ** jdev_name, 832 unsigned int * commit_max_age) 833 { 834 int c; 835 char * arg = NULL; 836 char * pos; 837 opt_desc_t opts[] = { 838 /* Compatibility stuff, so that -o notail for old setups still work */ 839 {"tails", .arg_required = 't', .values = tails}, 840 {"notail", .clrmask = (1<<REISERFS_LARGETAIL)|(1<<REISERFS_SMALLTAIL)}, 841 {"conv", .setmask = 1<<REISERFS_CONVERT}, 842 {"attrs", .setmask = 1<<REISERFS_ATTRS}, 843 {"noattrs", .clrmask = 1<<REISERFS_ATTRS}, 844 #ifdef CONFIG_REISERFS_FS_XATTR 845 {"user_xattr", .setmask = 1<<REISERFS_XATTRS_USER}, 846 {"nouser_xattr",.clrmask = 1<<REISERFS_XATTRS_USER}, 847 #else 848 {"user_xattr", .setmask = 1<<REISERFS_UNSUPPORTED_OPT}, 849 {"nouser_xattr",.clrmask = 1<<REISERFS_UNSUPPORTED_OPT}, 850 #endif 851 #ifdef CONFIG_REISERFS_FS_POSIX_ACL 852 {"acl", .setmask = 1<<REISERFS_POSIXACL}, 853 {"noacl", .clrmask = 1<<REISERFS_POSIXACL}, 854 #else 855 {"acl", .setmask = 1<<REISERFS_UNSUPPORTED_OPT}, 856 {"noacl", .clrmask = 1<<REISERFS_UNSUPPORTED_OPT}, 857 #endif 858 {"nolog",}, /* This is unsupported */ 859 {"replayonly", .setmask = 1<<REPLAYONLY}, 860 {"block-allocator", .arg_required = 'a', .values = balloc}, 861 {"data", .arg_required = 'd', .values = logging_mode}, 862 {"barrier", .arg_required = 'b', .values = barrier_mode}, 863 {"resize", .arg_required = 'r', .values = NULL}, 864 {"jdev", .arg_required = 'j', .values = NULL}, 865 {"nolargeio", .arg_required = 'w', .values = NULL}, 866 {"commit", .arg_required = 'c', .values = NULL}, 867 {"usrquota",}, 868 {"grpquota",}, 869 {"errors", .arg_required = 'e', .values = error_actions}, 870 {"usrjquota", .arg_required = 'u'|(1<<REISERFS_OPT_ALLOWEMPTY), .values = NULL}, 871 {"grpjquota", .arg_required = 'g'|(1<<REISERFS_OPT_ALLOWEMPTY), .values = NULL}, 872 {"jqfmt", .arg_required = 'f', .values = NULL}, 873 {NULL,} 874 }; 875 876 *blocks = 0; 877 if (!options || !*options) 878 /* use default configuration: create tails, journaling on, no 879 conversion to newest format */ 880 return 1; 881 882 for (pos = options; pos; ) { 883 c = reiserfs_getopt (s, &pos, opts, &arg, mount_options); 884 if (c == -1) 885 /* wrong option is given */ 886 return 0; 887 888 if (c == 'r') { 889 char * p; 890 891 p = NULL; 892 /* "resize=NNN" */ 893 *blocks = simple_strtoul (arg, &p, 0); 894 if (*p != '\0') { 895 /* NNN does not look like a number */ 896 reiserfs_warning (s, "reiserfs_parse_options: bad value %s", arg); 897 return 0; 898 } 899 } 900 901 if ( c == 'c' ) { 902 char *p = NULL; 903 unsigned long val = simple_strtoul (arg, &p, 0); 904 /* commit=NNN (time in seconds) */ 905 if ( *p != '\0' || val >= (unsigned int)-1) { 906 reiserfs_warning (s, "reiserfs_parse_options: bad value %s", arg); return 0; 907 } 908 *commit_max_age = (unsigned int)val; 909 } 910 911 if ( c == 'w' ) { 912 char *p=NULL; 913 int val = simple_strtoul (arg, &p, 0); 914 915 if ( *p != '\0') { 916 reiserfs_warning (s, "reiserfs_parse_options: non-numeric value %s for nolargeio option", arg); 917 return 0; 918 } 919 if ( val ) 920 reiserfs_default_io_size = PAGE_SIZE; 921 else 922 reiserfs_default_io_size = 128 * 1024; 923 } 924 925 if (c == 'j') { 926 if (arg && *arg && jdev_name) { 927 if ( *jdev_name ) { //Hm, already assigned? 928 reiserfs_warning (s, "reiserfs_parse_options: journal device was already specified to be %s", *jdev_name); 929 return 0; 930 } 931 *jdev_name = arg; 932 } 933 } 934 935 #ifdef CONFIG_QUOTA 936 if (c == 'u' || c == 'g') { 937 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; 938 939 if (sb_any_quota_enabled(s)) { 940 reiserfs_warning(s, "reiserfs_parse_options: cannot change journalled quota options when quota turned on."); 941 return 0; 942 } 943 if (*arg) { /* Some filename specified? */ 944 if (REISERFS_SB(s)->s_qf_names[qtype] && strcmp(REISERFS_SB(s)->s_qf_names[qtype], arg)) { 945 reiserfs_warning(s, "reiserfs_parse_options: %s quota file already specified.", QTYPE2NAME(qtype)); 946 return 0; 947 } 948 if (strchr(arg, '/')) { 949 reiserfs_warning(s, "reiserfs_parse_options: quotafile must be on filesystem root."); 950 return 0; 951 } 952 REISERFS_SB(s)->s_qf_names[qtype] = kmalloc(strlen(arg)+1, GFP_KERNEL); 953 if (!REISERFS_SB(s)->s_qf_names[qtype]) { 954 reiserfs_warning(s, "reiserfs_parse_options: not enough memory for storing quotafile name."); 955 return 0; 956 } 957 strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg); 958 } 959 else { 960 if (REISERFS_SB(s)->s_qf_names[qtype]) { 961 kfree(REISERFS_SB(s)->s_qf_names[qtype]); 962 REISERFS_SB(s)->s_qf_names[qtype] = NULL; 963 } 964 } 965 } 966 if (c == 'f') { 967 if (!strcmp(arg, "vfsold")) 968 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD; 969 else if (!strcmp(arg, "vfsv0")) 970 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0; 971 else { 972 reiserfs_warning(s, "reiserfs_parse_options: unknown quota format specified."); 973 return 0; 974 } 975 } 976 #else 977 if (c == 'u' || c == 'g' || c == 'f') { 978 reiserfs_warning(s, "reiserfs_parse_options: journalled quota options not supported."); 979 return 0; 980 } 981 #endif 982 } 983 984 #ifdef CONFIG_QUOTA 985 if (!REISERFS_SB(s)->s_jquota_fmt && (REISERFS_SB(s)->s_qf_names[USRQUOTA] || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) { 986 reiserfs_warning(s, "reiserfs_parse_options: journalled quota format not specified."); 987 return 0; 988 } 989 #endif 990 return 1; 991 } 992 993 static void switch_data_mode(struct super_block *s, unsigned long mode) { 994 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | 995 (1 << REISERFS_DATA_ORDERED) | 996 (1 << REISERFS_DATA_WRITEBACK)); 997 REISERFS_SB(s)->s_mount_opt |= (1 << mode); 998 } 999 1000 static void handle_data_mode(struct super_block *s, unsigned long mount_options) 1001 { 1002 if (mount_options & (1 << REISERFS_DATA_LOG)) { 1003 if (!reiserfs_data_log(s)) { 1004 switch_data_mode(s, REISERFS_DATA_LOG); 1005 reiserfs_info (s, "switching to journaled data mode\n"); 1006 } 1007 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { 1008 if (!reiserfs_data_ordered(s)) { 1009 switch_data_mode(s, REISERFS_DATA_ORDERED); 1010 reiserfs_info (s, "switching to ordered data mode\n"); 1011 } 1012 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { 1013 if (!reiserfs_data_writeback(s)) { 1014 switch_data_mode(s, REISERFS_DATA_WRITEBACK); 1015 reiserfs_info (s, "switching to writeback data mode\n"); 1016 } 1017 } 1018 } 1019 1020 static void handle_barrier_mode(struct super_block *s, unsigned long bits) { 1021 int flush = (1 << REISERFS_BARRIER_FLUSH); 1022 int none = (1 << REISERFS_BARRIER_NONE); 1023 int all_barrier = flush | none; 1024 1025 if (bits & all_barrier) { 1026 REISERFS_SB(s)->s_mount_opt &= ~all_barrier; 1027 if (bits & flush) { 1028 REISERFS_SB(s)->s_mount_opt |= flush; 1029 printk("reiserfs: enabling write barrier flush mode\n"); 1030 } else if (bits & none) { 1031 REISERFS_SB(s)->s_mount_opt |= none; 1032 printk("reiserfs: write barriers turned off\n"); 1033 } 1034 } 1035 } 1036 1037 static void handle_attrs( struct super_block *s ) 1038 { 1039 struct reiserfs_super_block * rs; 1040 1041 if( reiserfs_attrs( s ) ) { 1042 rs = SB_DISK_SUPER_BLOCK (s); 1043 if( old_format_only(s) ) { 1044 reiserfs_warning(s, "reiserfs: cannot support attributes on 3.5.x disk format" ); 1045 REISERFS_SB(s) -> s_mount_opt &= ~ ( 1 << REISERFS_ATTRS ); 1046 return; 1047 } 1048 if( !( le32_to_cpu( rs -> s_flags ) & reiserfs_attrs_cleared ) ) { 1049 reiserfs_warning(s, "reiserfs: cannot support attributes until flag is set in super-block" ); 1050 REISERFS_SB(s) -> s_mount_opt &= ~ ( 1 << REISERFS_ATTRS ); 1051 } 1052 } 1053 } 1054 1055 static int reiserfs_remount (struct super_block * s, int * mount_flags, char * arg) 1056 { 1057 struct reiserfs_super_block * rs; 1058 struct reiserfs_transaction_handle th ; 1059 unsigned long blocks; 1060 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; 1061 unsigned long safe_mask = 0; 1062 unsigned int commit_max_age = (unsigned int)-1; 1063 struct reiserfs_journal *journal = SB_JOURNAL(s); 1064 int err; 1065 #ifdef CONFIG_QUOTA 1066 int i; 1067 #endif 1068 1069 rs = SB_DISK_SUPER_BLOCK (s); 1070 1071 if (!reiserfs_parse_options(s, arg, &mount_options, &blocks, NULL, &commit_max_age)) { 1072 #ifdef CONFIG_QUOTA 1073 for (i = 0; i < MAXQUOTAS; i++) 1074 if (REISERFS_SB(s)->s_qf_names[i]) { 1075 kfree(REISERFS_SB(s)->s_qf_names[i]); 1076 REISERFS_SB(s)->s_qf_names[i] = NULL; 1077 } 1078 #endif 1079 return -EINVAL; 1080 } 1081 1082 handle_attrs(s); 1083 1084 /* Add options that are safe here */ 1085 safe_mask |= 1 << REISERFS_SMALLTAIL; 1086 safe_mask |= 1 << REISERFS_LARGETAIL; 1087 safe_mask |= 1 << REISERFS_NO_BORDER; 1088 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; 1089 safe_mask |= 1 << REISERFS_HASHED_RELOCATION; 1090 safe_mask |= 1 << REISERFS_TEST4; 1091 safe_mask |= 1 << REISERFS_ATTRS; 1092 safe_mask |= 1 << REISERFS_XATTRS_USER; 1093 safe_mask |= 1 << REISERFS_POSIXACL; 1094 safe_mask |= 1 << REISERFS_BARRIER_FLUSH; 1095 safe_mask |= 1 << REISERFS_BARRIER_NONE; 1096 safe_mask |= 1 << REISERFS_ERROR_RO; 1097 safe_mask |= 1 << REISERFS_ERROR_CONTINUE; 1098 safe_mask |= 1 << REISERFS_ERROR_PANIC; 1099 1100 /* Update the bitmask, taking care to keep 1101 * the bits we're not allowed to change here */ 1102 REISERFS_SB(s)->s_mount_opt = (REISERFS_SB(s)->s_mount_opt & ~safe_mask) | (mount_options & safe_mask); 1103 1104 if(commit_max_age != 0 && commit_max_age != (unsigned int)-1) { 1105 journal->j_max_commit_age = commit_max_age; 1106 journal->j_max_trans_age = commit_max_age; 1107 } 1108 else if(commit_max_age == 0) 1109 { 1110 /* 0 means restore defaults. */ 1111 journal->j_max_commit_age = journal->j_default_max_commit_age; 1112 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; 1113 } 1114 1115 if(blocks) { 1116 int rc = reiserfs_resize(s, blocks); 1117 if (rc != 0) 1118 return rc; 1119 } 1120 1121 if (*mount_flags & MS_RDONLY) { 1122 reiserfs_xattr_init (s, *mount_flags); 1123 /* remount read-only */ 1124 if (s->s_flags & MS_RDONLY) 1125 /* it is read-only already */ 1126 return 0; 1127 /* try to remount file system with read-only permissions */ 1128 if (sb_umount_state(rs) == REISERFS_VALID_FS || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { 1129 return 0; 1130 } 1131 1132 err = journal_begin(&th, s, 10) ; 1133 if (err) 1134 return err; 1135 1136 /* Mounting a rw partition read-only. */ 1137 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ; 1138 set_sb_umount_state( rs, REISERFS_SB(s)->s_mount_state ); 1139 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s)); 1140 } else { 1141 /* remount read-write */ 1142 if (!(s->s_flags & MS_RDONLY)) { 1143 reiserfs_xattr_init (s, *mount_flags); 1144 return 0; /* We are read-write already */ 1145 } 1146 1147 if (reiserfs_is_journal_aborted (journal)) 1148 return journal->j_errno; 1149 1150 handle_data_mode(s, mount_options); 1151 handle_barrier_mode(s, mount_options); 1152 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs) ; 1153 s->s_flags &= ~MS_RDONLY ; /* now it is safe to call journal_begin */ 1154 err = journal_begin(&th, s, 10) ; 1155 if (err) 1156 return err; 1157 1158 /* Mount a partition which is read-only, read-write */ 1159 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ; 1160 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); 1161 s->s_flags &= ~MS_RDONLY; 1162 set_sb_umount_state( rs, REISERFS_ERROR_FS ); 1163 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ 1164 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s)); 1165 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS ; 1166 } 1167 /* this will force a full flush of all journal lists */ 1168 SB_JOURNAL(s)->j_must_wait = 1 ; 1169 err = journal_end(&th, s, 10) ; 1170 if (err) 1171 return err; 1172 s->s_dirt = 0; 1173 1174 if (!( *mount_flags & MS_RDONLY ) ) { 1175 finish_unfinished( s ); 1176 reiserfs_xattr_init (s, *mount_flags); 1177 } 1178 1179 return 0; 1180 } 1181 1182 /* load_bitmap_info_data - Sets up the reiserfs_bitmap_info structure from disk. 1183 * @sb - superblock for this filesystem 1184 * @bi - the bitmap info to be loaded. Requires that bi->bh is valid. 1185 * 1186 * This routine counts how many free bits there are, finding the first zero 1187 * as a side effect. Could also be implemented as a loop of test_bit() calls, or 1188 * a loop of find_first_zero_bit() calls. This implementation is similar to 1189 * find_first_zero_bit(), but doesn't return after it finds the first bit. 1190 * Should only be called on fs mount, but should be fairly efficient anyways. 1191 * 1192 * bi->first_zero_hint is considered unset if it == 0, since the bitmap itself 1193 * will * invariably occupt block 0 represented in the bitmap. The only 1194 * exception to this is when free_count also == 0, since there will be no 1195 * free blocks at all. 1196 */ 1197 1198 static void load_bitmap_info_data (struct super_block *sb, 1199 struct reiserfs_bitmap_info *bi) 1200 { 1201 unsigned long *cur = (unsigned long *)bi->bh->b_data; 1202 1203 while ((char *)cur < (bi->bh->b_data + sb->s_blocksize)) { 1204 1205 /* No need to scan if all 0's or all 1's. 1206 * Since we're only counting 0's, we can simply ignore all 1's */ 1207 if (*cur == 0) { 1208 if (bi->first_zero_hint == 0) { 1209 bi->first_zero_hint = ((char *)cur - bi->bh->b_data) << 3; 1210 } 1211 bi->free_count += sizeof(unsigned long)*8; 1212 } else if (*cur != ~0L) { 1213 int b; 1214 for (b = 0; b < sizeof(unsigned long)*8; b++) { 1215 if (!reiserfs_test_le_bit (b, cur)) { 1216 bi->free_count ++; 1217 if (bi->first_zero_hint == 0) 1218 bi->first_zero_hint = 1219 (((char *)cur - bi->bh->b_data) << 3) + b; 1220 } 1221 } 1222 } 1223 cur ++; 1224 } 1225 1226 #ifdef CONFIG_REISERFS_CHECK 1227 // This outputs a lot of unneded info on big FSes 1228 // reiserfs_warning ("bitmap loaded from block %d: %d free blocks", 1229 // bi->bh->b_blocknr, bi->free_count); 1230 #endif 1231 } 1232 1233 static int read_bitmaps (struct super_block * s) 1234 { 1235 int i, bmap_nr; 1236 1237 SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s)); 1238 if (SB_AP_BITMAP (s) == 0) 1239 return 1; 1240 memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s)); 1241 for (i = 0, bmap_nr = REISERFS_DISK_OFFSET_IN_BYTES / s->s_blocksize + 1; 1242 i < SB_BMAP_NR(s); i++, bmap_nr = s->s_blocksize * 8 * i) { 1243 SB_AP_BITMAP (s)[i].bh = sb_getblk(s, bmap_nr); 1244 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) 1245 ll_rw_block(READ, 1, &SB_AP_BITMAP(s)[i].bh); 1246 } 1247 for (i = 0; i < SB_BMAP_NR(s); i++) { 1248 wait_on_buffer(SB_AP_BITMAP (s)[i].bh); 1249 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) { 1250 reiserfs_warning(s,"sh-2029: reiserfs read_bitmaps: " 1251 "bitmap block (#%lu) reading failed", 1252 SB_AP_BITMAP(s)[i].bh->b_blocknr); 1253 for (i = 0; i < SB_BMAP_NR(s); i++) 1254 brelse(SB_AP_BITMAP(s)[i].bh); 1255 vfree(SB_AP_BITMAP(s)); 1256 SB_AP_BITMAP(s) = NULL; 1257 return 1; 1258 } 1259 load_bitmap_info_data (s, SB_AP_BITMAP (s) + i); 1260 } 1261 return 0; 1262 } 1263 1264 static int read_old_bitmaps (struct super_block * s) 1265 { 1266 int i ; 1267 struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK(s); 1268 int bmp1 = (REISERFS_OLD_DISK_OFFSET_IN_BYTES / s->s_blocksize) + 1; /* first of bitmap blocks */ 1269 1270 /* read true bitmap */ 1271 SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs)); 1272 if (SB_AP_BITMAP (s) == 0) 1273 return 1; 1274 1275 memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs)); 1276 1277 for (i = 0; i < sb_bmap_nr(rs); i ++) { 1278 SB_AP_BITMAP (s)[i].bh = sb_bread (s, bmp1 + i); 1279 if (!SB_AP_BITMAP (s)[i].bh) 1280 return 1; 1281 load_bitmap_info_data (s, SB_AP_BITMAP (s) + i); 1282 } 1283 1284 return 0; 1285 } 1286 1287 static int read_super_block (struct super_block * s, int offset) 1288 { 1289 struct buffer_head * bh; 1290 struct reiserfs_super_block * rs; 1291 int fs_blocksize; 1292 1293 1294 bh = sb_bread (s, offset / s->s_blocksize); 1295 if (!bh) { 1296 reiserfs_warning (s, "sh-2006: read_super_block: " 1297 "bread failed (dev %s, block %lu, size %lu)", 1298 reiserfs_bdevname (s), offset / s->s_blocksize, s->s_blocksize); 1299 return 1; 1300 } 1301 1302 rs = (struct reiserfs_super_block *)bh->b_data; 1303 if (!is_any_reiserfs_magic_string (rs)) { 1304 brelse (bh); 1305 return 1; 1306 } 1307 1308 // 1309 // ok, reiserfs signature (old or new) found in at the given offset 1310 // 1311 fs_blocksize = sb_blocksize(rs); 1312 brelse (bh); 1313 sb_set_blocksize (s, fs_blocksize); 1314 1315 bh = sb_bread (s, offset / s->s_blocksize); 1316 if (!bh) { 1317 reiserfs_warning (s, "sh-2007: read_super_block: " 1318 "bread failed (dev %s, block %lu, size %lu)\n", 1319 reiserfs_bdevname (s), offset / s->s_blocksize, s->s_blocksize); 1320 return 1; 1321 } 1322 1323 rs = (struct reiserfs_super_block *)bh->b_data; 1324 if (sb_blocksize(rs) != s->s_blocksize) { 1325 reiserfs_warning (s, "sh-2011: read_super_block: " 1326 "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n", 1327 reiserfs_bdevname (s), (unsigned long long)bh->b_blocknr, s->s_blocksize); 1328 brelse (bh); 1329 return 1; 1330 } 1331 1332 if ( rs->s_v1.s_root_block == -1 ) { 1333 brelse(bh) ; 1334 reiserfs_warning (s, "Unfinished reiserfsck --rebuild-tree run detected. Please run\n" 1335 "reiserfsck --rebuild-tree and wait for a completion. If that fails\n" 1336 "get newer reiserfsprogs package"); 1337 return 1; 1338 } 1339 1340 SB_BUFFER_WITH_SB (s) = bh; 1341 SB_DISK_SUPER_BLOCK (s) = rs; 1342 1343 if (is_reiserfs_jr (rs)) { 1344 /* magic is of non-standard journal filesystem, look at s_version to 1345 find which format is in use */ 1346 if (sb_version(rs) == REISERFS_VERSION_2) 1347 reiserfs_warning (s, "read_super_block: found reiserfs format \"3.6\"" 1348 " with non-standard journal"); 1349 else if (sb_version(rs) == REISERFS_VERSION_1) 1350 reiserfs_warning (s, "read_super_block: found reiserfs format \"3.5\"" 1351 " with non-standard journal"); 1352 else { 1353 reiserfs_warning (s, "sh-2012: read_super_block: found unknown " 1354 "format \"%u\" of reiserfs with non-standard magic", 1355 sb_version(rs)); 1356 return 1; 1357 } 1358 } 1359 else 1360 /* s_version of standard format may contain incorrect information, 1361 so we just look at the magic string */ 1362 reiserfs_info (s, "found reiserfs format \"%s\" with standard journal\n", 1363 is_reiserfs_3_5 (rs) ? "3.5" : "3.6"); 1364 1365 s->s_op = &reiserfs_sops; 1366 s->s_export_op = &reiserfs_export_ops; 1367 #ifdef CONFIG_QUOTA 1368 s->s_qcop = &reiserfs_qctl_operations; 1369 s->dq_op = &reiserfs_quota_operations; 1370 #endif 1371 1372 /* new format is limited by the 32 bit wide i_blocks field, want to 1373 ** be one full block below that. 1374 */ 1375 s->s_maxbytes = (512LL << 32) - s->s_blocksize ; 1376 return 0; 1377 } 1378 1379 1380 1381 /* after journal replay, reread all bitmap and super blocks */ 1382 static int reread_meta_blocks(struct super_block *s) { 1383 int i ; 1384 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s))) ; 1385 wait_on_buffer(SB_BUFFER_WITH_SB(s)) ; 1386 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) { 1387 reiserfs_warning (s, "reread_meta_blocks, error reading the super") ; 1388 return 1 ; 1389 } 1390 1391 for (i = 0; i < SB_BMAP_NR(s) ; i++) { 1392 ll_rw_block(READ, 1, &(SB_AP_BITMAP(s)[i].bh)) ; 1393 wait_on_buffer(SB_AP_BITMAP(s)[i].bh) ; 1394 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) { 1395 reiserfs_warning (s, "reread_meta_blocks, error reading bitmap block number %d at %llu", 1396 i, (unsigned long long)SB_AP_BITMAP(s)[i].bh->b_blocknr) ; 1397 return 1 ; 1398 } 1399 } 1400 return 0 ; 1401 1402 } 1403 1404 1405 ///////////////////////////////////////////////////// 1406 // hash detection stuff 1407 1408 1409 // if root directory is empty - we set default - Yura's - hash and 1410 // warn about it 1411 // FIXME: we look for only one name in a directory. If tea and yura 1412 // bith have the same value - we ask user to send report to the 1413 // mailing list 1414 static __u32 find_hash_out (struct super_block * s) 1415 { 1416 int retval; 1417 struct inode * inode; 1418 struct cpu_key key; 1419 INITIALIZE_PATH (path); 1420 struct reiserfs_dir_entry de; 1421 __u32 hash = DEFAULT_HASH; 1422 1423 inode = s->s_root->d_inode; 1424 1425 do { // Some serious "goto"-hater was there ;) 1426 u32 teahash, r5hash, yurahash; 1427 1428 make_cpu_key (&key, inode, ~0, TYPE_DIRENTRY, 3); 1429 retval = search_by_entry_key (s, &key, &path, &de); 1430 if (retval == IO_ERROR) { 1431 pathrelse (&path); 1432 return UNSET_HASH ; 1433 } 1434 if (retval == NAME_NOT_FOUND) 1435 de.de_entry_num --; 1436 set_de_name_and_namelen (&de); 1437 if (deh_offset( &(de.de_deh[de.de_entry_num]) ) == DOT_DOT_OFFSET) { 1438 /* allow override in this case */ 1439 if (reiserfs_rupasov_hash(s)) { 1440 hash = YURA_HASH ; 1441 } 1442 reiserfs_warning(s,"FS seems to be empty, autodetect " 1443 "is using the default hash"); 1444 break; 1445 } 1446 r5hash=GET_HASH_VALUE (r5_hash (de.de_name, de.de_namelen)); 1447 teahash=GET_HASH_VALUE (keyed_hash (de.de_name, de.de_namelen)); 1448 yurahash=GET_HASH_VALUE (yura_hash (de.de_name, de.de_namelen)); 1449 if ( ( (teahash == r5hash) && (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) ) || 1450 ( (teahash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) || 1451 ( (r5hash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) ) { 1452 reiserfs_warning(s,"Unable to automatically detect hash function. " 1453 "Please mount with -o hash={tea,rupasov,r5}", 1454 reiserfs_bdevname (s)); 1455 hash = UNSET_HASH; 1456 break; 1457 } 1458 if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == yurahash) 1459 hash = YURA_HASH; 1460 else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == teahash) 1461 hash = TEA_HASH; 1462 else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == r5hash) 1463 hash = R5_HASH; 1464 else { 1465 reiserfs_warning (s,"Unrecognised hash function"); 1466 hash = UNSET_HASH; 1467 } 1468 } while (0); 1469 1470 pathrelse (&path); 1471 return hash; 1472 } 1473 1474 // finds out which hash names are sorted with 1475 static int what_hash (struct super_block * s) 1476 { 1477 __u32 code; 1478 1479 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); 1480 1481 /* reiserfs_hash_detect() == true if any of the hash mount options 1482 ** were used. We must check them to make sure the user isn't 1483 ** using a bad hash value 1484 */ 1485 if (code == UNSET_HASH || reiserfs_hash_detect(s)) 1486 code = find_hash_out (s); 1487 1488 if (code != UNSET_HASH && reiserfs_hash_detect(s)) { 1489 /* detection has found the hash, and we must check against the 1490 ** mount options 1491 */ 1492 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { 1493 reiserfs_warning (s, "Error, %s hash detected, " 1494 "unable to force rupasov hash", reiserfs_hashname(code)) ; 1495 code = UNSET_HASH ; 1496 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { 1497 reiserfs_warning (s, "Error, %s hash detected, " 1498 "unable to force tea hash", reiserfs_hashname(code)) ; 1499 code = UNSET_HASH ; 1500 } else if (reiserfs_r5_hash(s) && code != R5_HASH) { 1501 reiserfs_warning (s, "Error, %s hash detected, " 1502 "unable to force r5 hash", reiserfs_hashname(code)) ; 1503 code = UNSET_HASH ; 1504 } 1505 } else { 1506 /* find_hash_out was not called or could not determine the hash */ 1507 if (reiserfs_rupasov_hash(s)) { 1508 code = YURA_HASH ; 1509 } else if (reiserfs_tea_hash(s)) { 1510 code = TEA_HASH ; 1511 } else if (reiserfs_r5_hash(s)) { 1512 code = R5_HASH ; 1513 } 1514 } 1515 1516 /* if we are mounted RW, and we have a new valid hash code, update 1517 ** the super 1518 */ 1519 if (code != UNSET_HASH && 1520 !(s->s_flags & MS_RDONLY) && 1521 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { 1522 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); 1523 } 1524 return code; 1525 } 1526 1527 // return pointer to appropriate function 1528 static hashf_t hash_function (struct super_block * s) 1529 { 1530 switch (what_hash (s)) { 1531 case TEA_HASH: 1532 reiserfs_info (s, "Using tea hash to sort names\n"); 1533 return keyed_hash; 1534 case YURA_HASH: 1535 reiserfs_info (s, "Using rupasov hash to sort names\n"); 1536 return yura_hash; 1537 case R5_HASH: 1538 reiserfs_info (s, "Using r5 hash to sort names\n"); 1539 return r5_hash; 1540 } 1541 return NULL; 1542 } 1543 1544 // this is used to set up correct value for old partitions 1545 static int function2code (hashf_t func) 1546 { 1547 if (func == keyed_hash) 1548 return TEA_HASH; 1549 if (func == yura_hash) 1550 return YURA_HASH; 1551 if (func == r5_hash) 1552 return R5_HASH; 1553 1554 BUG() ; // should never happen 1555 1556 return 0; 1557 } 1558 1559 #define SWARN(silent, s, ...) \ 1560 if (!(silent)) \ 1561 reiserfs_warning (s, __VA_ARGS__) 1562 1563 static int reiserfs_fill_super (struct super_block * s, void * data, int silent) 1564 { 1565 struct inode *root_inode; 1566 int j; 1567 struct reiserfs_transaction_handle th ; 1568 int old_format = 0; 1569 unsigned long blocks; 1570 unsigned int commit_max_age = 0; 1571 int jinit_done = 0 ; 1572 struct reiserfs_iget_args args ; 1573 struct reiserfs_super_block * rs; 1574 char *jdev_name; 1575 struct reiserfs_sb_info *sbi; 1576 int errval = -EINVAL; 1577 1578 sbi = kmalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); 1579 if (!sbi) { 1580 errval = -ENOMEM; 1581 goto error; 1582 } 1583 s->s_fs_info = sbi; 1584 memset (sbi, 0, sizeof (struct reiserfs_sb_info)); 1585 /* Set default values for options: non-aggressive tails, RO on errors */ 1586 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL); 1587 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO); 1588 /* no preallocation minimum, be smart in 1589 reiserfs_file_write instead */ 1590 REISERFS_SB(s)->s_alloc_options.preallocmin = 0; 1591 /* Preallocate by 16 blocks (17-1) at once */ 1592 REISERFS_SB(s)->s_alloc_options.preallocsize = 17; 1593 /* Initialize the rwsem for xattr dir */ 1594 init_rwsem(&REISERFS_SB(s)->xattr_dir_sem); 1595 1596 /* setup default block allocator options */ 1597 reiserfs_init_alloc_options(s); 1598 1599 jdev_name = NULL; 1600 if (reiserfs_parse_options (s, (char *) data, &(sbi->s_mount_opt), &blocks, &jdev_name, &commit_max_age) == 0) { 1601 goto error; 1602 } 1603 1604 if (blocks) { 1605 SWARN (silent, s, "jmacd-7: reiserfs_fill_super: resize option " 1606 "for remount only"); 1607 goto error; 1608 } 1609 1610 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */ 1611 if (!read_super_block (s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) 1612 old_format = 1; 1613 /* try new format (64-th 1k block), which can contain reiserfs super block */ 1614 else if (read_super_block (s, REISERFS_DISK_OFFSET_IN_BYTES)) { 1615 SWARN(silent, s, "sh-2021: reiserfs_fill_super: can not find reiserfs on %s", reiserfs_bdevname (s)); 1616 goto error; 1617 } 1618 1619 rs = SB_DISK_SUPER_BLOCK (s); 1620 /* Let's do basic sanity check to verify that underlying device is not 1621 smaller than the filesystem. If the check fails then abort and scream, 1622 because bad stuff will happen otherwise. */ 1623 if ( s->s_bdev && s->s_bdev->bd_inode && i_size_read(s->s_bdev->bd_inode) < sb_block_count(rs)*sb_blocksize(rs)) { 1624 SWARN (silent, s, "Filesystem on %s cannot be mounted because it is bigger than the device", reiserfs_bdevname(s)); 1625 SWARN(silent, s, "You may need to run fsck or increase size of your LVM partition"); 1626 SWARN(silent, s, "Or may be you forgot to reboot after fdisk when it told you to"); 1627 goto error; 1628 } 1629 1630 sbi->s_mount_state = SB_REISERFS_STATE(s); 1631 sbi->s_mount_state = REISERFS_VALID_FS ; 1632 1633 if (old_format ? read_old_bitmaps(s) : read_bitmaps(s)) { 1634 SWARN(silent, s, "jmacd-8: reiserfs_fill_super: unable to read bitmap"); 1635 goto error; 1636 } 1637 #ifdef CONFIG_REISERFS_CHECK 1638 SWARN (silent, s, "CONFIG_REISERFS_CHECK is set ON"); 1639 SWARN (silent, s, "- it is slow mode for debugging."); 1640 #endif 1641 1642 /* make data=ordered the default */ 1643 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && 1644 !reiserfs_data_writeback(s)) 1645 { 1646 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); 1647 } 1648 1649 if (reiserfs_data_log(s)) { 1650 reiserfs_info (s, "using journaled data mode\n"); 1651 } else if (reiserfs_data_ordered(s)) { 1652 reiserfs_info (s, "using ordered data mode\n"); 1653 } else { 1654 reiserfs_info (s, "using writeback data mode\n"); 1655 } 1656 if (reiserfs_barrier_flush(s)) { 1657 printk("reiserfs: using flush barriers\n"); 1658 } 1659 1660 // set_device_ro(s->s_dev, 1) ; 1661 if( journal_init(s, jdev_name, old_format, commit_max_age) ) { 1662 SWARN(silent, s, "sh-2022: reiserfs_fill_super: unable to initialize journal space") ; 1663 goto error ; 1664 } else { 1665 jinit_done = 1 ; /* once this is set, journal_release must be called 1666 ** if we error out of the mount 1667 */ 1668 } 1669 if (reread_meta_blocks(s)) { 1670 SWARN(silent, s, "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init") ; 1671 goto error ; 1672 } 1673 1674 if (replay_only (s)) 1675 goto error; 1676 1677 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) { 1678 SWARN(silent, s, "clm-7000: Detected readonly device, marking FS readonly") ; 1679 s->s_flags |= MS_RDONLY ; 1680 } 1681 args.objectid = REISERFS_ROOT_OBJECTID ; 1682 args.dirid = REISERFS_ROOT_PARENT_OBJECTID ; 1683 root_inode = iget5_locked (s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, reiserfs_init_locked_inode, (void *)(&args)); 1684 if (!root_inode) { 1685 SWARN(silent, s, "jmacd-10: reiserfs_fill_super: get root inode failed"); 1686 goto error; 1687 } 1688 1689 if (root_inode->i_state & I_NEW) { 1690 reiserfs_read_locked_inode(root_inode, &args); 1691 unlock_new_inode(root_inode); 1692 } 1693 1694 s->s_root = d_alloc_root(root_inode); 1695 if (!s->s_root) { 1696 iput(root_inode); 1697 goto error; 1698 } 1699 1700 // define and initialize hash function 1701 sbi->s_hash_function = hash_function (s); 1702 if (sbi->s_hash_function == NULL) { 1703 dput(s->s_root) ; 1704 s->s_root = NULL ; 1705 goto error ; 1706 } 1707 1708 if (is_reiserfs_3_5 (rs) || (is_reiserfs_jr (rs) && SB_VERSION (s) == REISERFS_VERSION_1)) 1709 set_bit(REISERFS_3_5, &(sbi->s_properties)); 1710 else 1711 set_bit(REISERFS_3_6, &(sbi->s_properties)); 1712 1713 if (!(s->s_flags & MS_RDONLY)) { 1714 1715 errval = journal_begin(&th, s, 1) ; 1716 if (errval) { 1717 dput (s->s_root); 1718 s->s_root = NULL; 1719 goto error; 1720 } 1721 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ; 1722 1723 set_sb_umount_state( rs, REISERFS_ERROR_FS ); 1724 set_sb_fs_state (rs, 0); 1725 1726 if (old_format_only(s)) { 1727 /* filesystem of format 3.5 either with standard or non-standard 1728 journal */ 1729 if (convert_reiserfs (s)) { 1730 /* and -o conv is given */ 1731 if(!silent) 1732 reiserfs_info (s,"converting 3.5 filesystem to the 3.6 format") ; 1733 1734 if (is_reiserfs_3_5 (rs)) 1735 /* put magic string of 3.6 format. 2.2 will not be able to 1736 mount this filesystem anymore */ 1737 memcpy (rs->s_v1.s_magic, reiserfs_3_6_magic_string, 1738 sizeof (reiserfs_3_6_magic_string)); 1739 1740 set_sb_version(rs,REISERFS_VERSION_2); 1741 reiserfs_convert_objectid_map_v1(s) ; 1742 set_bit(REISERFS_3_6, &(sbi->s_properties)); 1743 clear_bit(REISERFS_3_5, &(sbi->s_properties)); 1744 } else if (!silent){ 1745 reiserfs_info (s, "using 3.5.x disk format\n") ; 1746 } 1747 } 1748 1749 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s)); 1750 errval = journal_end(&th, s, 1) ; 1751 if (errval) { 1752 dput (s->s_root); 1753 s->s_root = NULL; 1754 goto error; 1755 } 1756 1757 if ((errval = reiserfs_xattr_init (s, s->s_flags))) { 1758 dput (s->s_root); 1759 s->s_root = NULL; 1760 goto error; 1761 } 1762 1763 /* look for files which were to be removed in previous session */ 1764 finish_unfinished (s); 1765 } else { 1766 if ( old_format_only(s) && !silent) { 1767 reiserfs_info (s, "using 3.5.x disk format\n") ; 1768 } 1769 1770 if ((errval = reiserfs_xattr_init (s, s->s_flags))) { 1771 dput (s->s_root); 1772 s->s_root = NULL; 1773 goto error; 1774 } 1775 } 1776 // mark hash in super block: it could be unset. overwrite should be ok 1777 set_sb_hash_function_code( rs, function2code(sbi->s_hash_function ) ); 1778 1779 handle_attrs( s ); 1780 1781 reiserfs_proc_info_init( s ); 1782 1783 init_waitqueue_head (&(sbi->s_wait)); 1784 spin_lock_init(&sbi->bitmap_lock); 1785 1786 return (0); 1787 1788 error: 1789 if (jinit_done) { /* kill the commit thread, free journal ram */ 1790 journal_release_error(NULL, s) ; 1791 } 1792 if (SB_DISK_SUPER_BLOCK (s)) { 1793 for (j = 0; j < SB_BMAP_NR (s); j ++) { 1794 if (SB_AP_BITMAP (s)) 1795 brelse (SB_AP_BITMAP (s)[j].bh); 1796 } 1797 if (SB_AP_BITMAP (s)) 1798 vfree (SB_AP_BITMAP (s)); 1799 } 1800 if (SB_BUFFER_WITH_SB (s)) 1801 brelse(SB_BUFFER_WITH_SB (s)); 1802 #ifdef CONFIG_QUOTA 1803 for (j = 0; j < MAXQUOTAS; j++) { 1804 if (sbi->s_qf_names[j]) 1805 kfree(sbi->s_qf_names[j]); 1806 } 1807 #endif 1808 if (sbi != NULL) { 1809 kfree(sbi); 1810 } 1811 1812 s->s_fs_info = NULL; 1813 return errval; 1814 } 1815 1816 1817 static int reiserfs_statfs (struct super_block * s, struct kstatfs * buf) 1818 { 1819 struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK (s); 1820 1821 buf->f_namelen = (REISERFS_MAX_NAME (s->s_blocksize)); 1822 buf->f_bfree = sb_free_blocks(rs); 1823 buf->f_bavail = buf->f_bfree; 1824 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; 1825 buf->f_bsize = s->s_blocksize; 1826 /* changed to accommodate gcc folks.*/ 1827 buf->f_type = REISERFS_SUPER_MAGIC; 1828 return 0; 1829 } 1830 1831 #ifdef CONFIG_QUOTA 1832 static int reiserfs_dquot_initialize(struct inode *inode, int type) 1833 { 1834 struct reiserfs_transaction_handle th; 1835 int ret; 1836 1837 /* We may create quota structure so we need to reserve enough blocks */ 1838 reiserfs_write_lock(inode->i_sb); 1839 journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS); 1840 ret = dquot_initialize(inode, type); 1841 journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS); 1842 reiserfs_write_unlock(inode->i_sb); 1843 return ret; 1844 } 1845 1846 static int reiserfs_dquot_drop(struct inode *inode) 1847 { 1848 struct reiserfs_transaction_handle th; 1849 int ret; 1850 1851 /* We may delete quota structure so we need to reserve enough blocks */ 1852 reiserfs_write_lock(inode->i_sb); 1853 journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS); 1854 ret = dquot_drop(inode); 1855 journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS); 1856 reiserfs_write_unlock(inode->i_sb); 1857 return ret; 1858 } 1859 1860 static int reiserfs_write_dquot(struct dquot *dquot) 1861 { 1862 struct reiserfs_transaction_handle th; 1863 int ret; 1864 1865 reiserfs_write_lock(dquot->dq_sb); 1866 journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS); 1867 ret = dquot_commit(dquot); 1868 journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS); 1869 reiserfs_write_unlock(dquot->dq_sb); 1870 return ret; 1871 } 1872 1873 static int reiserfs_acquire_dquot(struct dquot *dquot) 1874 { 1875 struct reiserfs_transaction_handle th; 1876 int ret; 1877 1878 reiserfs_write_lock(dquot->dq_sb); 1879 journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS); 1880 ret = dquot_acquire(dquot); 1881 journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS); 1882 reiserfs_write_unlock(dquot->dq_sb); 1883 return ret; 1884 } 1885 1886 static int reiserfs_release_dquot(struct dquot *dquot) 1887 { 1888 struct reiserfs_transaction_handle th; 1889 int ret; 1890 1891 reiserfs_write_lock(dquot->dq_sb); 1892 journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS); 1893 ret = dquot_release(dquot); 1894 journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS); 1895 reiserfs_write_unlock(dquot->dq_sb); 1896 return ret; 1897 } 1898 1899 static int reiserfs_mark_dquot_dirty(struct dquot *dquot) 1900 { 1901 /* Are we journalling quotas? */ 1902 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 1903 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 1904 dquot_mark_dquot_dirty(dquot); 1905 return reiserfs_write_dquot(dquot); 1906 } 1907 else 1908 return dquot_mark_dquot_dirty(dquot); 1909 } 1910 1911 static int reiserfs_write_info(struct super_block *sb, int type) 1912 { 1913 struct reiserfs_transaction_handle th; 1914 int ret; 1915 1916 /* Data block + inode block */ 1917 reiserfs_write_lock(sb); 1918 journal_begin(&th, sb, 2); 1919 ret = dquot_commit_info(sb, type); 1920 journal_end(&th, sb, 2); 1921 reiserfs_write_unlock(sb); 1922 return ret; 1923 } 1924 1925 /* 1926 * Turn on quotas during mount time - we need to find 1927 * the quota file and such... 1928 */ 1929 static int reiserfs_quota_on_mount(struct super_block *sb, int type) 1930 { 1931 int err; 1932 struct dentry *dentry; 1933 struct qstr name = { .name = REISERFS_SB(sb)->s_qf_names[type], 1934 .hash = 0, 1935 .len = strlen(REISERFS_SB(sb)->s_qf_names[type])}; 1936 1937 dentry = lookup_hash(&name, sb->s_root); 1938 if (IS_ERR(dentry)) 1939 return PTR_ERR(dentry); 1940 err = vfs_quota_on_mount(type, REISERFS_SB(sb)->s_jquota_fmt, dentry); 1941 /* Now invalidate and put the dentry - quota got its own reference 1942 * to inode and dentry has at least wrong hash so we had better 1943 * throw it away */ 1944 d_invalidate(dentry); 1945 dput(dentry); 1946 return err; 1947 } 1948 1949 /* 1950 * Standard function to be called on quota_on 1951 */ 1952 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, char *path) 1953 { 1954 int err; 1955 struct nameidata nd; 1956 1957 err = path_lookup(path, LOOKUP_FOLLOW, &nd); 1958 if (err) 1959 return err; 1960 /* Quotafile not on the same filesystem? */ 1961 if (nd.mnt->mnt_sb != sb) { 1962 path_release(&nd); 1963 return -EXDEV; 1964 } 1965 /* We must not pack tails for quota files on reiserfs for quota IO to work */ 1966 if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) { 1967 reiserfs_warning(sb, "reiserfs: Quota file must have tail packing disabled."); 1968 path_release(&nd); 1969 return -EINVAL; 1970 } 1971 /* Not journalling quota? No more tests needed... */ 1972 if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] && 1973 !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) { 1974 path_release(&nd); 1975 return vfs_quota_on(sb, type, format_id, path); 1976 } 1977 /* Quotafile not of fs root? */ 1978 if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode) 1979 reiserfs_warning(sb, "reiserfs: Quota file not on filesystem root. " 1980 "Journalled quota will not work."); 1981 path_release(&nd); 1982 return vfs_quota_on(sb, type, format_id, path); 1983 } 1984 1985 /* Read data from quotafile - avoid pagecache and such because we cannot afford 1986 * acquiring the locks... As quota files are never truncated and quota code 1987 * itself serializes the operations (and noone else should touch the files) 1988 * we don't have to be afraid of races */ 1989 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, 1990 size_t len, loff_t off) 1991 { 1992 struct inode *inode = sb_dqopt(sb)->files[type]; 1993 unsigned long blk = off >> sb->s_blocksize_bits; 1994 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; 1995 size_t toread; 1996 struct buffer_head tmp_bh, *bh; 1997 loff_t i_size = i_size_read(inode); 1998 1999 if (off > i_size) 2000 return 0; 2001 if (off+len > i_size) 2002 len = i_size-off; 2003 toread = len; 2004 while (toread > 0) { 2005 tocopy = sb->s_blocksize - offset < toread ? sb->s_blocksize - offset : toread; 2006 tmp_bh.b_state = 0; 2007 /* Quota files are without tails so we can safely use this function */ 2008 reiserfs_write_lock(sb); 2009 err = reiserfs_get_block(inode, blk, &tmp_bh, 0); 2010 reiserfs_write_unlock(sb); 2011 if (err) 2012 return err; 2013 if (!buffer_mapped(&tmp_bh)) /* A hole? */ 2014 memset(data, 0, tocopy); 2015 else { 2016 bh = sb_bread(sb, tmp_bh.b_blocknr); 2017 if (!bh) 2018 return -EIO; 2019 memcpy(data, bh->b_data+offset, tocopy); 2020 brelse(bh); 2021 } 2022 offset = 0; 2023 toread -= tocopy; 2024 data += tocopy; 2025 blk++; 2026 } 2027 return len; 2028 } 2029 2030 /* Write to quotafile (we know the transaction is already started and has 2031 * enough credits) */ 2032 static ssize_t reiserfs_quota_write(struct super_block *sb, int type, 2033 const char *data, size_t len, loff_t off) 2034 { 2035 struct inode *inode = sb_dqopt(sb)->files[type]; 2036 unsigned long blk = off >> sb->s_blocksize_bits; 2037 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; 2038 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; 2039 size_t towrite = len; 2040 struct buffer_head tmp_bh, *bh; 2041 2042 down(&inode->i_sem); 2043 while (towrite > 0) { 2044 tocopy = sb->s_blocksize - offset < towrite ? 2045 sb->s_blocksize - offset : towrite; 2046 tmp_bh.b_state = 0; 2047 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); 2048 if (err) 2049 goto out; 2050 if (offset || tocopy != sb->s_blocksize) 2051 bh = sb_bread(sb, tmp_bh.b_blocknr); 2052 else 2053 bh = sb_getblk(sb, tmp_bh.b_blocknr); 2054 if (!bh) { 2055 err = -EIO; 2056 goto out; 2057 } 2058 lock_buffer(bh); 2059 memcpy(bh->b_data+offset, data, tocopy); 2060 flush_dcache_page(bh->b_page); 2061 set_buffer_uptodate(bh); 2062 unlock_buffer(bh); 2063 reiserfs_prepare_for_journal(sb, bh, 1); 2064 journal_mark_dirty(current->journal_info, sb, bh); 2065 if (!journal_quota) 2066 reiserfs_add_ordered_list(inode, bh); 2067 brelse(bh); 2068 offset = 0; 2069 towrite -= tocopy; 2070 data += tocopy; 2071 blk++; 2072 } 2073 out: 2074 if (len == towrite) 2075 return err; 2076 if (inode->i_size < off+len-towrite) 2077 i_size_write(inode, off+len-towrite); 2078 inode->i_version++; 2079 inode->i_mtime = inode->i_ctime = CURRENT_TIME; 2080 mark_inode_dirty(inode); 2081 up(&inode->i_sem); 2082 return len - towrite; 2083 } 2084 2085 #endif 2086 2087 static struct super_block* 2088 get_super_block (struct file_system_type *fs_type, int flags, 2089 const char *dev_name, void *data) 2090 { 2091 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super); 2092 } 2093 2094 static int __init 2095 init_reiserfs_fs ( void ) 2096 { 2097 int ret; 2098 2099 if ((ret = init_inodecache ())) { 2100 return ret; 2101 } 2102 2103 if ((ret = reiserfs_xattr_register_handlers ())) 2104 goto failed_reiserfs_xattr_register_handlers; 2105 2106 reiserfs_proc_info_global_init (); 2107 reiserfs_proc_register_global ("version", reiserfs_global_version_in_proc); 2108 2109 ret = register_filesystem (& reiserfs_fs_type); 2110 2111 if (ret == 0) { 2112 return 0; 2113 } 2114 2115 reiserfs_xattr_unregister_handlers (); 2116 2117 failed_reiserfs_xattr_register_handlers: 2118 reiserfs_proc_unregister_global ("version"); 2119 reiserfs_proc_info_global_done (); 2120 destroy_inodecache (); 2121 2122 return ret; 2123 } 2124 2125 static void __exit 2126 exit_reiserfs_fs ( void ) 2127 { 2128 reiserfs_xattr_unregister_handlers (); 2129 reiserfs_proc_unregister_global ("version"); 2130 reiserfs_proc_info_global_done (); 2131 unregister_filesystem (& reiserfs_fs_type); 2132 destroy_inodecache (); 2133 } 2134 2135 struct file_system_type reiserfs_fs_type = { 2136 .owner = THIS_MODULE, 2137 .name = "reiserfs", 2138 .get_sb = get_super_block, 2139 .kill_sb = kill_block_super, 2140 .fs_flags = FS_REQUIRES_DEV, 2141 }; 2142 2143 MODULE_DESCRIPTION ("ReiserFS journaled filesystem"); 2144 MODULE_AUTHOR ("Hans Reiser <reiser@namesys.com>"); 2145 MODULE_LICENSE ("GPL"); 2146 2147 module_init (init_reiserfs_fs); 2148 module_exit (exit_reiserfs_fs); 2149