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