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1/*2 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README3 *4 * Trivial changes by Alan Cox to add the LFS fixes5 *6 * Trivial Changes:7 * Rights granted to Hans Reiser to redistribute under other terms providing8 * he accepts all liability including but not limited to patent, fitness9 * for purpose, and direct or indirect claims arising from failure to perform.10 *11 * NO WARRANTY12 */13 14#include <linux/module.h>15#include <linux/slab.h>16#include <linux/vmalloc.h>17#include <linux/time.h>18#include <linux/uaccess.h>19#include "reiserfs.h"20#include "acl.h"21#include "xattr.h"22#include <linux/init.h>23#include <linux/blkdev.h>24#include <linux/backing-dev.h>25#include <linux/buffer_head.h>26#include <linux/exportfs.h>27#include <linux/quotaops.h>28#include <linux/vfs.h>29#include <linux/mount.h>30#include <linux/namei.h>31#include <linux/crc32.h>32#include <linux/seq_file.h>33 34struct file_system_type reiserfs_fs_type;35 36static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;37static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;38static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;39 40int is_reiserfs_3_5(struct reiserfs_super_block *rs)41{42 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,43 strlen(reiserfs_3_5_magic_string));44}45 46int is_reiserfs_3_6(struct reiserfs_super_block *rs)47{48 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,49 strlen(reiserfs_3_6_magic_string));50}51 52int is_reiserfs_jr(struct reiserfs_super_block *rs)53{54 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,55 strlen(reiserfs_jr_magic_string));56}57 58static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)59{60 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||61 is_reiserfs_jr(rs));62}63 64static int reiserfs_remount(struct super_block *s, int *flags, char *data);65static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);66 67static int reiserfs_sync_fs(struct super_block *s, int wait)68{69 struct reiserfs_transaction_handle th;70 71 /*72 * Writeback quota in non-journalled quota case - journalled quota has73 * no dirty dquots74 */75 dquot_writeback_dquots(s, -1);76 reiserfs_write_lock(s);77 if (!journal_begin(&th, s, 1))78 if (!journal_end_sync(&th))79 reiserfs_flush_old_commits(s);80 reiserfs_write_unlock(s);81 return 0;82}83 84static void flush_old_commits(struct work_struct *work)85{86 struct reiserfs_sb_info *sbi;87 struct super_block *s;88 89 sbi = container_of(work, struct reiserfs_sb_info, old_work.work);90 s = sbi->s_journal->j_work_sb;91 92 /*93 * We need s_umount for protecting quota writeback. We have to use94 * trylock as reiserfs_cancel_old_flush() may be waiting for this work95 * to complete with s_umount held.96 */97 if (!down_read_trylock(&s->s_umount)) {98 /* Requeue work if we are not cancelling it */99 spin_lock(&sbi->old_work_lock);100 if (sbi->work_queued == 1)101 queue_delayed_work(system_long_wq, &sbi->old_work, HZ);102 spin_unlock(&sbi->old_work_lock);103 return;104 }105 spin_lock(&sbi->old_work_lock);106 /* Avoid clobbering the cancel state... */107 if (sbi->work_queued == 1)108 sbi->work_queued = 0;109 spin_unlock(&sbi->old_work_lock);110 111 reiserfs_sync_fs(s, 1);112 up_read(&s->s_umount);113}114 115void reiserfs_schedule_old_flush(struct super_block *s)116{117 struct reiserfs_sb_info *sbi = REISERFS_SB(s);118 unsigned long delay;119 120 /*121 * Avoid scheduling flush when sb is being shut down. It can race122 * with journal shutdown and free still queued delayed work.123 */124 if (sb_rdonly(s) || !(s->s_flags & SB_ACTIVE))125 return;126 127 spin_lock(&sbi->old_work_lock);128 if (!sbi->work_queued) {129 delay = msecs_to_jiffies(dirty_writeback_interval * 10);130 queue_delayed_work(system_long_wq, &sbi->old_work, delay);131 sbi->work_queued = 1;132 }133 spin_unlock(&sbi->old_work_lock);134}135 136void reiserfs_cancel_old_flush(struct super_block *s)137{138 struct reiserfs_sb_info *sbi = REISERFS_SB(s);139 140 spin_lock(&sbi->old_work_lock);141 /* Make sure no new flushes will be queued */142 sbi->work_queued = 2;143 spin_unlock(&sbi->old_work_lock);144 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);145}146 147static int reiserfs_freeze(struct super_block *s)148{149 struct reiserfs_transaction_handle th;150 151 reiserfs_cancel_old_flush(s);152 153 reiserfs_write_lock(s);154 if (!sb_rdonly(s)) {155 int err = journal_begin(&th, s, 1);156 if (err) {157 reiserfs_block_writes(&th);158 } else {159 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),160 1);161 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));162 reiserfs_block_writes(&th);163 journal_end_sync(&th);164 }165 }166 reiserfs_write_unlock(s);167 return 0;168}169 170static int reiserfs_unfreeze(struct super_block *s)171{172 struct reiserfs_sb_info *sbi = REISERFS_SB(s);173 174 reiserfs_allow_writes(s);175 spin_lock(&sbi->old_work_lock);176 /* Allow old_work to run again */177 sbi->work_queued = 0;178 spin_unlock(&sbi->old_work_lock);179 return 0;180}181 182extern const struct in_core_key MAX_IN_CORE_KEY;183 184/*185 * this is used to delete "save link" when there are no items of a186 * file it points to. It can either happen if unlink is completed but187 * "save unlink" removal, or if file has both unlink and truncate188 * pending and as unlink completes first (because key of "save link"189 * protecting unlink is bigger that a key lf "save link" which190 * protects truncate), so there left no items to make truncate191 * completion on192 */193static int remove_save_link_only(struct super_block *s,194 struct reiserfs_key *key, int oid_free)195{196 struct reiserfs_transaction_handle th;197 int err;198 199 /* we are going to do one balancing */200 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);201 if (err)202 return err;203 204 reiserfs_delete_solid_item(&th, NULL, key);205 if (oid_free)206 /* removals are protected by direct items */207 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));208 209 return journal_end(&th);210}211 212#ifdef CONFIG_QUOTA213static int reiserfs_quota_on_mount(struct super_block *, int);214#endif215 216/*217 * Look for uncompleted unlinks and truncates and complete them218 *219 * Called with superblock write locked. If quotas are enabled, we have to220 * release/retake lest we call dquot_quota_on_mount(), proceed to221 * schedule_on_each_cpu() in invalidate_bdev() and deadlock waiting for the per222 * cpu worklets to complete flush_async_commits() that in turn wait for the223 * superblock write lock.224 */225static int finish_unfinished(struct super_block *s)226{227 INITIALIZE_PATH(path);228 struct cpu_key max_cpu_key, obj_key;229 struct reiserfs_key save_link_key, last_inode_key;230 int retval = 0;231 struct item_head *ih;232 struct buffer_head *bh;233 int item_pos;234 char *item;235 int done;236 struct inode *inode;237 int truncate;238#ifdef CONFIG_QUOTA239 int i;240 int ms_active_set;241 int quota_enabled[REISERFS_MAXQUOTAS];242#endif243 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_QUOTA254 /* 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#endif281 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 else311 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 not327 * manage to remove "save" link and release objectid328 */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 which350 * is impossible. The only imaginable way is to351 * execute unfinished truncate request then boot352 * into old kernel, remove the file and create dir353 * 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 was370 * committed together with "save" link371 */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_QUOTA405 /* 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#endif416 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 files425 * being unlinked. This link will be deleted in the same transaction with last426 * item of file. mounting the filesystem we scan all these links and remove427 * files which almost got lost428 */429void add_save_link(struct reiserfs_transaction_handle *th,430 struct inode *inode, int truncate)431{432 INITIALIZE_PATH(path);433 int retval;434 struct cpu_key key;435 struct item_head ih;436 __le32 link;437 438 BUG_ON(!th->t_trans_id);439 440 /* file can only get one "save link" of each kind */441 RFALSE(truncate &&442 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),443 "saved link already exists for truncated inode %lx",444 (long)inode->i_ino);445 RFALSE(!truncate &&446 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),447 "saved link already exists for unlinked inode %lx",448 (long)inode->i_ino);449 450 /* setup key of "save" link */451 key.version = KEY_FORMAT_3_5;452 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;453 key.on_disk_key.k_objectid = inode->i_ino;454 if (!truncate) {455 /* unlink, rmdir, rename */456 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);457 set_cpu_key_k_type(&key, TYPE_DIRECT);458 459 /* item head of "safe" link */460 make_le_item_head(&ih, &key, key.version,461 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,462 4 /*length */ , 0xffff /*free space */ );463 } else {464 /* truncate */465 if (S_ISDIR(inode->i_mode))466 reiserfs_warning(inode->i_sb, "green-2102",467 "Adding a truncate savelink for "468 "a directory %k! Please report",469 INODE_PKEY(inode));470 set_cpu_key_k_offset(&key, 1);471 set_cpu_key_k_type(&key, TYPE_INDIRECT);472 473 /* item head of "safe" link */474 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,475 4 /*length */ , 0 /*free space */ );476 }477 key.key_length = 3;478 479 /* look for its place in the tree */480 retval = search_item(inode->i_sb, &key, &path);481 if (retval != ITEM_NOT_FOUND) {482 if (retval != -ENOSPC)483 reiserfs_error(inode->i_sb, "vs-2100",484 "search_by_key (%K) returned %d", &key,485 retval);486 pathrelse(&path);487 return;488 }489 490 /* body of "save" link */491 link = INODE_PKEY(inode)->k_dir_id;492 493 /* put "save" link into tree, don't charge quota to anyone */494 retval =495 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);496 if (retval) {497 if (retval != -ENOSPC)498 reiserfs_error(inode->i_sb, "vs-2120",499 "insert_item returned %d", retval);500 } else {501 if (truncate)502 REISERFS_I(inode)->i_flags |=503 i_link_saved_truncate_mask;504 else505 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;506 }507}508 509/* this opens transaction unlike add_save_link */510int remove_save_link(struct inode *inode, int truncate)511{512 struct reiserfs_transaction_handle th;513 struct reiserfs_key key;514 int err;515 516 /* we are going to do one balancing only */517 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);518 if (err)519 return err;520 521 /* setup key of "save" link */522 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);523 key.k_objectid = INODE_PKEY(inode)->k_objectid;524 if (!truncate) {525 /* unlink, rmdir, rename */526 set_le_key_k_offset(KEY_FORMAT_3_5, &key,527 1 + inode->i_sb->s_blocksize);528 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);529 } else {530 /* truncate */531 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);532 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);533 }534 535 if ((truncate &&536 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||537 (!truncate &&538 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))539 /* don't take quota bytes from anywhere */540 reiserfs_delete_solid_item(&th, NULL, &key);541 if (!truncate) {542 reiserfs_release_objectid(&th, inode->i_ino);543 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;544 } else545 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;546 547 return journal_end(&th);548}549 550static void reiserfs_kill_sb(struct super_block *s)551{552 if (REISERFS_SB(s)) {553 reiserfs_proc_info_done(s);554 /*555 * Force any pending inode evictions to occur now. Any556 * inodes to be removed that have extended attributes557 * associated with them need to clean them up before558 * we can release the extended attribute root dentries.559 * shrink_dcache_for_umount will BUG if we don't release560 * 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_QUOTA574static int reiserfs_quota_off(struct super_block *sb, int type);575 576static void reiserfs_quota_off_umount(struct super_block *s)577{578 int type;579 580 for (type = 0; type < REISERFS_MAXQUOTAS; type++)581 reiserfs_quota_off(s, type);582}583#else584static inline void reiserfs_quota_off_umount(struct super_block *s)585{586}587#endif588 589static void reiserfs_put_super(struct super_block *s)590{591 struct reiserfs_transaction_handle th;592 th.t_trans_id = 0;593 594 reiserfs_quota_off_umount(s);595 596 reiserfs_write_lock(s);597 598 /*599 * change file system state to current state if it was mounted600 * with read-write permissions601 */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 can614 * decide not to do a journal_end615 */616 journal_release(&th, s);617 618 reiserfs_free_bitmap_cache(s);619 620 brelse(SB_BUFFER_WITH_SB(s));621 622 print_statistics(s);623 624 if (REISERFS_SB(s)->reserved_blocks != 0) {625 reiserfs_warning(s, "green-2005", "reserved blocks left %d",626 REISERFS_SB(s)->reserved_blocks);627 }628 629 reiserfs_write_unlock(s);630 mutex_destroy(&REISERFS_SB(s)->lock);631 destroy_workqueue(REISERFS_SB(s)->commit_wq);632 kfree(REISERFS_SB(s)->s_jdev);633 kfree(s->s_fs_info);634 s->s_fs_info = NULL;635}636 637static struct kmem_cache *reiserfs_inode_cachep;638 639static struct inode *reiserfs_alloc_inode(struct super_block *sb)640{641 struct reiserfs_inode_info *ei;642 ei = alloc_inode_sb(sb, reiserfs_inode_cachep, GFP_KERNEL);643 if (!ei)644 return NULL;645 atomic_set(&ei->openers, 0);646 mutex_init(&ei->tailpack);647#ifdef CONFIG_QUOTA648 memset(&ei->i_dquot, 0, sizeof(ei->i_dquot));649#endif650 651 return &ei->vfs_inode;652}653 654static void reiserfs_free_inode(struct inode *inode)655{656 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));657}658 659static void init_once(void *foo)660{661 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;662 663 INIT_LIST_HEAD(&ei->i_prealloc_list);664 inode_init_once(&ei->vfs_inode);665}666 667static int __init init_inodecache(void)668{669 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",670 sizeof(struct671 reiserfs_inode_info),672 0, (SLAB_RECLAIM_ACCOUNT|673 SLAB_ACCOUNT),674 init_once);675 if (reiserfs_inode_cachep == NULL)676 return -ENOMEM;677 return 0;678}679 680static void destroy_inodecache(void)681{682 /*683 * Make sure all delayed rcu free inodes are flushed before we684 * destroy cache.685 */686 rcu_barrier();687 kmem_cache_destroy(reiserfs_inode_cachep);688}689 690/* we don't mark inodes dirty, we just log them */691static void reiserfs_dirty_inode(struct inode *inode, int flags)692{693 struct reiserfs_transaction_handle th;694 695 int err = 0;696 697 if (sb_rdonly(inode->i_sb)) {698 reiserfs_warning(inode->i_sb, "clm-6006",699 "writing inode %lu on readonly FS",700 inode->i_ino);701 return;702 }703 reiserfs_write_lock(inode->i_sb);704 705 /*706 * this is really only used for atime updates, so they don't have707 * to be included in O_SYNC or fsync708 */709 err = journal_begin(&th, inode->i_sb, 1);710 if (err)711 goto out;712 713 reiserfs_update_sd(&th, inode);714 journal_end(&th);715 716out:717 reiserfs_write_unlock(inode->i_sb);718}719 720static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)721{722 struct super_block *s = root->d_sb;723 struct reiserfs_journal *journal = SB_JOURNAL(s);724 long opts = REISERFS_SB(s)->s_mount_opt;725 726 if (opts & (1 << REISERFS_LARGETAIL))727 seq_puts(seq, ",tails=on");728 else if (!(opts & (1 << REISERFS_SMALLTAIL)))729 seq_puts(seq, ",notail");730 /* tails=small is default so we don't show it */731 732 if (!(opts & (1 << REISERFS_BARRIER_FLUSH)))733 seq_puts(seq, ",barrier=none");734 /* barrier=flush is default so we don't show it */735 736 if (opts & (1 << REISERFS_ERROR_CONTINUE))737 seq_puts(seq, ",errors=continue");738 else if (opts & (1 << REISERFS_ERROR_PANIC))739 seq_puts(seq, ",errors=panic");740 /* errors=ro is default so we don't show it */741 742 if (opts & (1 << REISERFS_DATA_LOG))743 seq_puts(seq, ",data=journal");744 else if (opts & (1 << REISERFS_DATA_WRITEBACK))745 seq_puts(seq, ",data=writeback");746 /* data=ordered is default so we don't show it */747 748 if (opts & (1 << REISERFS_ATTRS))749 seq_puts(seq, ",attrs");750 751 if (opts & (1 << REISERFS_XATTRS_USER))752 seq_puts(seq, ",user_xattr");753 754 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT))755 seq_puts(seq, ",expose_privroot");756 757 if (opts & (1 << REISERFS_POSIXACL))758 seq_puts(seq, ",acl");759 760 if (REISERFS_SB(s)->s_jdev)761 seq_show_option(seq, "jdev", REISERFS_SB(s)->s_jdev);762 763 if (journal->j_max_commit_age != journal->j_default_max_commit_age)764 seq_printf(seq, ",commit=%d", journal->j_max_commit_age);765 766#ifdef CONFIG_QUOTA767 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#endif784 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_QUOTA799static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,800 size_t, loff_t);801static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,802 loff_t);803 804static struct dquot __rcu **reiserfs_get_dquots(struct inode *inode)805{806 return REISERFS_I(inode)->i_dquot;807}808#endif809 810static const struct super_operations reiserfs_sops = {811 .alloc_inode = reiserfs_alloc_inode,812 .free_inode = reiserfs_free_inode,813 .write_inode = reiserfs_write_inode,814 .dirty_inode = reiserfs_dirty_inode,815 .evict_inode = reiserfs_evict_inode,816 .put_super = reiserfs_put_super,817 .sync_fs = reiserfs_sync_fs,818 .freeze_fs = reiserfs_freeze,819 .unfreeze_fs = reiserfs_unfreeze,820 .statfs = reiserfs_statfs,821 .remount_fs = reiserfs_remount,822 .show_options = reiserfs_show_options,823#ifdef CONFIG_QUOTA824 .quota_read = reiserfs_quota_read,825 .quota_write = reiserfs_quota_write,826 .get_dquots = reiserfs_get_dquots,827#endif828};829 830#ifdef CONFIG_QUOTA831#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")832 833static int reiserfs_write_dquot(struct dquot *);834static int reiserfs_acquire_dquot(struct dquot *);835static int reiserfs_release_dquot(struct dquot *);836static int reiserfs_mark_dquot_dirty(struct dquot *);837static int reiserfs_write_info(struct super_block *, int);838static int reiserfs_quota_on(struct super_block *, int, int, const struct path *);839 840static const struct dquot_operations reiserfs_quota_operations = {841 .write_dquot = reiserfs_write_dquot,842 .acquire_dquot = reiserfs_acquire_dquot,843 .release_dquot = reiserfs_release_dquot,844 .mark_dirty = reiserfs_mark_dquot_dirty,845 .write_info = reiserfs_write_info,846 .alloc_dquot = dquot_alloc,847 .destroy_dquot = dquot_destroy,848 .get_next_id = dquot_get_next_id,849};850 851static const struct quotactl_ops reiserfs_qctl_operations = {852 .quota_on = reiserfs_quota_on,853 .quota_off = reiserfs_quota_off,854 .quota_sync = dquot_quota_sync,855 .get_state = dquot_get_state,856 .set_info = dquot_set_dqinfo,857 .get_dqblk = dquot_get_dqblk,858 .set_dqblk = dquot_set_dqblk,859};860#endif861 862static const struct export_operations reiserfs_export_ops = {863 .encode_fh = reiserfs_encode_fh,864 .fh_to_dentry = reiserfs_fh_to_dentry,865 .fh_to_parent = reiserfs_fh_to_parent,866 .get_parent = reiserfs_get_parent,867};868 869/*870 * this struct is used in reiserfs_getopt () for containing the value for871 * those mount options that have values rather than being toggles.872 */873typedef struct {874 char *value;875 /*876 * bitmask which is to set on mount_options bitmask877 * 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 bitmask882 * when this value is found, 0 is no bits are to be changed.883 * This is applied BEFORE setmask884 */885 int clrmask;886} arg_desc_t;887 888/* Set this bit in arg_required to allow empty arguments */889#define REISERFS_OPT_ALLOWEMPTY 31890 891/*892 * this struct is used in reiserfs_getopt() for describing the893 * set of reiserfs mount options894 */895typedef struct {896 char *option_name;897 898 /* 0 if argument is not required, not 0 otherwise */899 int arg_required;900 901 /* list of values accepted by an option */902 const arg_desc_t *values;903 904 /*905 * bitmask which is to set on mount_options bitmask906 * 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 bitmask912 * when this value is found, 0 is no bits are to be changed.913 * This is applied BEFORE setmask914 */915 int clrmask;916} opt_desc_t;917 918/* possible values for -o data= */919static const arg_desc_t logging_mode[] = {920 {"ordered", 1 << REISERFS_DATA_ORDERED,921 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},922 {"journal", 1 << REISERFS_DATA_LOG,923 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},924 {"writeback", 1 << REISERFS_DATA_WRITEBACK,925 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},926 {.value = NULL}927};928 929/* possible values for -o barrier= */930static const arg_desc_t barrier_mode[] = {931 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},932 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},933 {.value = NULL}934};935 936/*937 * possible values for "-o block-allocator=" and bits which are to be set in938 * s_mount_opt of reiserfs specific part of in-core super block939 */940static const arg_desc_t balloc[] = {941 {"noborder", 1 << REISERFS_NO_BORDER, 0},942 {"border", 0, 1 << REISERFS_NO_BORDER},943 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},944 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},945 {"test4", 1 << REISERFS_TEST4, 0},946 {"notest4", 0, 1 << REISERFS_TEST4},947 {NULL, 0, 0}948};949 950static const arg_desc_t tails[] = {951 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},952 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},953 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},954 {NULL, 0, 0}955};956 957static const arg_desc_t error_actions[] = {958 {"panic", 1 << REISERFS_ERROR_PANIC,959 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},960 {"ro-remount", 1 << REISERFS_ERROR_RO,961 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},962#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG963 {"continue", 1 << REISERFS_ERROR_CONTINUE,964 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},965#endif966 {NULL, 0, 0},967};968 969/*970 * proceed only one option from a list *cur - string containing of mount971 * options972 * opts - array of options which are accepted973 * opt_arg - if option is found and requires an argument and if it is specifed974 * in the input - pointer to the argument is stored here975 * bit_flags - if option requires to set a certain bit - it is set here976 * return -1 if unknown option is found, opt->arg_required otherwise977 */978static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,979 char **opt_arg, unsigned long *bit_flags)980{981 char *p;982 /*983 * foo=bar,984 * ^ ^ ^985 * | | +-- option_end986 * | +-- arg_start987 * +-- option_start988 */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 options1004 * parser so that it can understand several arguments for1005 * some options, also so that it can fill several bitfields1006 * 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 else1025 *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 else1032 *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 not1072 * required1073 */1074 p++;1075 1076 if (opt->arg_required1077 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))1078 && !strlen(p)) {1079 /* this catches "option=," if not allowed */1080 reiserfs_warning(s, "super-6506",1081 "empty argument for \"%s\"\n",1082 opt->option_name);1083 return -1;1084 }1085 1086 if (!opt->values) {1087 /* *=NULLopt_arg contains pointer to argument */1088 *opt_arg = p;1089 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);1090 }1091 1092 /* values possible for this option are listed in opt->values */1093 for (arg = opt->values; arg->value; arg++) {1094 if (!strcmp(p, arg->value)) {1095 if (bit_flags) {1096 *bit_flags &= ~arg->clrmask;1097 *bit_flags |= arg->setmask;1098 }1099 return opt->arg_required;1100 }1101 }1102 1103 reiserfs_warning(s, "super-6506",1104 "bad value \"%s\" for option \"%s\"\n", p,1105 opt->option_name);1106 return -1;1107}1108 1109/* returns 0 if something is wrong in option string, 1 - otherwise */1110static int reiserfs_parse_options(struct super_block *s,1111 1112 /* string given via mount's -o */1113 char *options,1114 1115 /*1116 * after the parsing phase, contains the1117 * collection of bitflags defining what1118 * 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 old1135 * setups still work1136 */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_XATTR1145 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},1146 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},1147#else1148 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},1149 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},1150#endif1151#ifdef CONFIG_REISERFS_FS_POSIX_ACL1152 {"acl",.setmask = 1 << REISERFS_POSIXACL},1153 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},1154#else1155 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},1156 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},1157#endif1158 {.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, no1183 * conversion to newest format1184 */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_QUOTA1247 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 else1289 *mount_options |= 1 << REISERFS_GRPQUOTA;1290 } else {1291 if (qtype == USRQUOTA)1292 *mount_options &= ~(1 << REISERFS_USRQUOTA);1293 else1294 *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#else1318 if (c == 'u' || c == 'g' || c == 'f') {1319 reiserfs_warning(s, "reiserfs-2503", "journaled "1320 "quota options not supported.");1321 return 0;1322 }1323#endif1324 }1325 1326#ifdef CONFIG_QUOTA1327 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt1328 && (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#endif1342 1343 return 1;1344}1345 1346static void switch_data_mode(struct super_block *s, unsigned long mode)1347{1348 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |1349 (1 << REISERFS_DATA_ORDERED) |1350 (1 << REISERFS_DATA_WRITEBACK));1351 REISERFS_SB(s)->s_mount_opt |= (1 << mode);1352}1353 1354static void handle_data_mode(struct super_block *s, unsigned long mount_options)1355{1356 if (mount_options & (1 << REISERFS_DATA_LOG)) {1357 if (!reiserfs_data_log(s)) {1358 switch_data_mode(s, REISERFS_DATA_LOG);1359 reiserfs_info(s, "switching to journaled data mode\n");1360 }1361 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {1362 if (!reiserfs_data_ordered(s)) {1363 switch_data_mode(s, REISERFS_DATA_ORDERED);1364 reiserfs_info(s, "switching to ordered data mode\n");1365 }1366 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {1367 if (!reiserfs_data_writeback(s)) {1368 switch_data_mode(s, REISERFS_DATA_WRITEBACK);1369 reiserfs_info(s, "switching to writeback data mode\n");1370 }1371 }1372}1373 1374static void handle_barrier_mode(struct super_block *s, unsigned long bits)1375{1376 int flush = (1 << REISERFS_BARRIER_FLUSH);1377 int none = (1 << REISERFS_BARRIER_NONE);1378 int all_barrier = flush | none;1379 1380 if (bits & all_barrier) {1381 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;1382 if (bits & flush) {1383 REISERFS_SB(s)->s_mount_opt |= flush;1384 printk("reiserfs: enabling write barrier flush mode\n");1385 } else if (bits & none) {1386 REISERFS_SB(s)->s_mount_opt |= none;1387 printk("reiserfs: write barriers turned off\n");1388 }1389 }1390}1391 1392static void handle_attrs(struct super_block *s)1393{1394 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);1395 1396 if (reiserfs_attrs(s)) {1397 if (old_format_only(s)) {1398 reiserfs_warning(s, "super-6517", "cannot support "1399 "attributes on 3.5.x disk format");1400 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);1401 return;1402 }1403 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {1404 reiserfs_warning(s, "super-6518", "cannot support "1405 "attributes until flag is set in "1406 "super-block");1407 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);1408 }1409 }1410}1411 1412#ifdef CONFIG_QUOTA1413static 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#endif1427 1428static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)1429{1430 struct reiserfs_super_block *rs;1431 struct reiserfs_transaction_handle th;1432 unsigned long blocks;1433 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;1434 unsigned long safe_mask = 0;1435 unsigned int commit_max_age = (unsigned int)-1;1436 struct reiserfs_journal *journal = SB_JOURNAL(s);1437 int err;1438 char *qf_names[REISERFS_MAXQUOTAS];1439 unsigned int qfmt = 0;1440#ifdef CONFIG_QUOTA1441 int i;1442#endif1443 1444 sync_filesystem(s);1445 reiserfs_write_lock(s);1446 1447#ifdef CONFIG_QUOTA1448 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));1449#endif1450 1451 rs = SB_DISK_SUPER_BLOCK(s);1452 1453 if (!reiserfs_parse_options1454 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,1455 qf_names, &qfmt)) {1456#ifdef CONFIG_QUOTA1457 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#endif1461 err = -EINVAL;1462 goto out_err_unlock;1463 }1464#ifdef CONFIG_QUOTA1465 handle_quota_files(s, qf_names, &qfmt);1466#endif1467 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 keep1490 * the bits we're not allowed to change here1491 */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_FS1525 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {1526 goto out_ok_unlocked;1527 }1528 1529 reiserfs_write_lock(s);1530 1531 err = journal_begin(&th, s, 10);1532 if (err)1533 goto out_err_unlock;1534 1535 /* Mounting a rw partition read-only. */1536 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);1537 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);1538 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));1539 } else {1540 /* remount read-write */1541 if (!sb_rdonly(s)) {1542 reiserfs_write_unlock(s);1543 reiserfs_xattr_init(s, *mount_flags);1544 goto out_ok_unlocked; /* We are read-write already */1545 }1546 1547 if (reiserfs_is_journal_aborted(journal)) {1548 err = journal->j_errno;1549 goto out_err_unlock;1550 }1551 1552 handle_data_mode(s, mount_options);1553 handle_barrier_mode(s, mount_options);1554 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);1555 1556 /* now it is safe to call journal_begin */1557 s->s_flags &= ~SB_RDONLY;1558 err = journal_begin(&th, s, 10);1559 if (err)1560 goto out_err_unlock;1561 1562 /* Mount a partition which is read-only, read-write */1563 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);1564 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);1565 s->s_flags &= ~SB_RDONLY;1566 set_sb_umount_state(rs, REISERFS_ERROR_FS);1567 if (!old_format_only(s))1568 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);1569 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */1570 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));1571 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;1572 }1573 /* this will force a full flush of all journal lists */1574 SB_JOURNAL(s)->j_must_wait = 1;1575 err = journal_end(&th);1576 if (err)1577 goto out_err_unlock;1578 1579 reiserfs_write_unlock(s);1580 if (!(*mount_flags & SB_RDONLY)) {1581 dquot_resume(s, -1);1582 reiserfs_write_lock(s);1583 finish_unfinished(s);1584 reiserfs_write_unlock(s);1585 reiserfs_xattr_init(s, *mount_flags);1586 }1587 1588out_ok_unlocked:1589 return 0;1590 1591out_err_unlock:1592 reiserfs_write_unlock(s);1593out_err:1594 return err;1595}1596 1597static int read_super_block(struct super_block *s, int offset)1598{1599 struct buffer_head *bh;1600 struct reiserfs_super_block *rs;1601 int fs_blocksize;1602 1603 bh = sb_bread(s, offset / s->s_blocksize);1604 if (!bh) {1605 reiserfs_warning(s, "sh-2006",1606 "bread failed (dev %s, block %lu, size %lu)",1607 s->s_id, offset / s->s_blocksize,1608 s->s_blocksize);1609 return 1;1610 }1611 1612 rs = (struct reiserfs_super_block *)bh->b_data;1613 if (!is_any_reiserfs_magic_string(rs)) {1614 brelse(bh);1615 return 1;1616 }1617 /*1618 * ok, reiserfs signature (old or new) found in at the given offset1619 */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 to1661 * find which format is in use1662 */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 } else1677 /*1678 * s_version of standard format may contain incorrect1679 * information, so we just look at the magic string1680 */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_QUOTA1688 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#endif1692 1693 /*1694 * new format is limited by the 32 bit wide i_blocks field, want to1695 * be one full block below that.1696 */1697 s->s_maxbytes = (512LL << 32) - s->s_blocksize;1698 return 0;1699}1700 1701/* after journal replay, reread all bitmap and super blocks */1702static int reread_meta_blocks(struct super_block *s)1703{1704 if (bh_read(SB_BUFFER_WITH_SB(s), 0) < 0) {1705 reiserfs_warning(s, "reiserfs-2504", "error reading the super");1706 return 1;1707 }1708 1709 return 0;1710}1711 1712/* hash detection stuff */1713 1714/*1715 * if root directory is empty - we set default - Yura's - hash and1716 * warn about it1717 * FIXME: we look for only one name in a directory. If tea and yura1718 * both have the same value - we ask user to send report to the1719 * mailing list1720 */1721static __u32 find_hash_out(struct super_block *s)1722{1723 int retval;1724 struct inode *inode;1725 struct cpu_key key;1726 INITIALIZE_PATH(path);1727 struct reiserfs_dir_entry de;1728 struct reiserfs_de_head *deh;1729 __u32 hash = DEFAULT_HASH;1730 __u32 deh_hashval, teahash, r5hash, yurahash;1731 1732 inode = d_inode(s->s_root);1733 1734 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);1735 retval = search_by_entry_key(s, &key, &path, &de);1736 if (retval == IO_ERROR) {1737 pathrelse(&path);1738 return UNSET_HASH;1739 }1740 if (retval == NAME_NOT_FOUND)1741 de.de_entry_num--;1742 1743 set_de_name_and_namelen(&de);1744 deh = de.de_deh + de.de_entry_num;1745 1746 if (deh_offset(deh) == DOT_DOT_OFFSET) {1747 /* allow override in this case */1748 if (reiserfs_rupasov_hash(s))1749 hash = YURA_HASH;1750 reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n");1751 goto out;1752 }1753 1754 deh_hashval = GET_HASH_VALUE(deh_offset(deh));1755 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));1756 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));1757 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));1758 1759 if ((teahash == r5hash && deh_hashval == r5hash) ||1760 (teahash == yurahash && deh_hashval == yurahash) ||1761 (r5hash == yurahash && deh_hashval == yurahash)) {1762 reiserfs_warning(s, "reiserfs-2506",1763 "Unable to automatically detect hash "1764 "function. Please mount with -o "1765 "hash={tea,rupasov,r5}");1766 hash = UNSET_HASH;1767 goto out;1768 }1769 1770 if (deh_hashval == yurahash)1771 hash = YURA_HASH;1772 else if (deh_hashval == teahash)1773 hash = TEA_HASH;1774 else if (deh_hashval == r5hash)1775 hash = R5_HASH;1776 else {1777 reiserfs_warning(s, "reiserfs-2506",1778 "Unrecognised hash function");1779 hash = UNSET_HASH;1780 }1781out:1782 pathrelse(&path);1783 return hash;1784}1785 1786/* finds out which hash names are sorted with */1787static int what_hash(struct super_block *s)1788{1789 __u32 code;1790 1791 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));1792 1793 /*1794 * reiserfs_hash_detect() == true if any of the hash mount options1795 * were used. We must check them to make sure the user isn't1796 * using a bad hash value1797 */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 the1804 * mount options1805 */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 or1828 * could not determine the hash1829 */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, update1841 * the super1842 */1843 if (code != UNSET_HASH &&1844 !sb_rdonly(s) &&1845 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {1846 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);1847 }1848 return code;1849}1850 1851/* return pointer to appropriate function */1852static hashf_t hash_function(struct super_block *s)1853{1854 switch (what_hash(s)) {1855 case TEA_HASH:1856 reiserfs_info(s, "Using tea hash to sort names\n");1857 return keyed_hash;1858 case YURA_HASH:1859 reiserfs_info(s, "Using rupasov hash to sort names\n");1860 return yura_hash;1861 case R5_HASH:1862 reiserfs_info(s, "Using r5 hash to sort names\n");1863 return r5_hash;1864 }1865 return NULL;1866}1867 1868/* this is used to set up correct value for old partitions */1869static int function2code(hashf_t func)1870{1871 if (func == keyed_hash)1872 return TEA_HASH;1873 if (func == yura_hash)1874 return YURA_HASH;1875 if (func == r5_hash)1876 return R5_HASH;1877 1878 BUG(); /* should never happen */1879 1880 return 0;1881}1882 1883#define SWARN(silent, s, id, ...) \1884 if (!(silent)) \1885 reiserfs_warning(s, id, __VA_ARGS__)1886 1887static int reiserfs_fill_super(struct super_block *s, void *data, int silent)1888{1889 struct inode *root_inode;1890 struct reiserfs_transaction_handle th;1891 int old_format = 0;1892 unsigned long blocks;1893 unsigned int commit_max_age = 0;1894 int jinit_done = 0;1895 struct reiserfs_iget_args args;1896 struct reiserfs_super_block *rs;1897 char *jdev_name;1898 struct reiserfs_sb_info *sbi;1899 int errval = -EINVAL;1900 char *qf_names[REISERFS_MAXQUOTAS] = {};1901 unsigned int qfmt = 0;1902 1903 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);1904 if (!sbi)1905 return -ENOMEM;1906 s->s_fs_info = sbi;1907 /* Set default values for options: non-aggressive tails, RO on errors */1908 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL);1909 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO);1910 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);1911 /* no preallocation minimum, be smart in reiserfs_file_write instead */1912 sbi->s_alloc_options.preallocmin = 0;1913 /* Preallocate by 16 blocks (17-1) at once */1914 sbi->s_alloc_options.preallocsize = 17;1915 /* setup default block allocator options */1916 reiserfs_init_alloc_options(s);1917 1918 spin_lock_init(&sbi->old_work_lock);1919 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits);1920 mutex_init(&sbi->lock);1921 sbi->lock_depth = -1;1922 1923 sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0,1924 s->s_id);1925 if (!sbi->commit_wq) {1926 SWARN(silent, s, "", "Cannot allocate commit workqueue");1927 errval = -ENOMEM;1928 goto error_unlocked;1929 }1930 1931 jdev_name = NULL;1932 if (reiserfs_parse_options1933 (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_QUOTA1946 handle_quota_files(s, qf_names, &qfmt);1947#endif1948 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 1k1956 * 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 reiserfs1963 * super block1964 */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 not1977 * smaller than the filesystem. If the check fails then abort and1978 * 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_CHECK2000 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");2001 SWARN(silent, s, "", "- it is slow mode for debugging.");2002#endif2003 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 called2028 * if we error out of the mount2029 */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 many2062 * reiserfs helpers called in the mount path and elsewhere require2063 * this lock to be held even if it's not always necessary. Let's be2064 * conservative and hold it early. The window can be reduced after2065 * 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 else2099 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 this2116 * case, but older revisions can't. This will cause the2117 * file system to fail mount on those older implementations,2118 * avoiding corruption. -jeffm2119 */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 standard2134 * or non-standard journal2135 */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 to2146 * mount this filesystem anymore2147 */2148 memcpy(rs->s_v1.s_magic,2149 reiserfs_3_6_magic_string,2150 sizeof2151 (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 } else2161 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 session2183 */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 ok2201 */2202 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));2203 2204 handle_attrs(s);2205 2206 reiserfs_proc_info_init(s);2207 2208 init_waitqueue_head(&(sbi->s_wait));2209 spin_lock_init(&sbi->bitmap_lock);2210 2211 reiserfs_write_unlock(s);2212 2213 return (0);2214 2215error:2216 reiserfs_write_unlock(s);2217 2218error_unlocked:2219 /* kill the commit thread, free journal ram */2220 if (jinit_done) {2221 reiserfs_write_lock(s);2222 journal_release_error(NULL, s);2223 reiserfs_write_unlock(s);2224 }2225 2226 if (sbi->commit_wq)2227 destroy_workqueue(sbi->commit_wq);2228 2229 reiserfs_cancel_old_flush(s);2230 2231 reiserfs_free_bitmap_cache(s);2232 if (SB_BUFFER_WITH_SB(s))2233 brelse(SB_BUFFER_WITH_SB(s));2234#ifdef CONFIG_QUOTA2235 {2236 int j;2237 for (j = 0; j < REISERFS_MAXQUOTAS; j++)2238 kfree(qf_names[j]);2239 }2240#endif2241 kfree(sbi->s_jdev);2242 kfree(sbi);2243 2244 s->s_fs_info = NULL;2245 return errval;2246}2247 2248static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)2249{2250 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);2251 2252 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));2253 buf->f_bfree = sb_free_blocks(rs);2254 buf->f_bavail = buf->f_bfree;2255 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;2256 buf->f_bsize = dentry->d_sb->s_blocksize;2257 /* changed to accommodate gcc folks. */2258 buf->f_type = REISERFS_SUPER_MAGIC;2259 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);2260 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,2261 sizeof(rs->s_uuid)/2);2262 2263 return 0;2264}2265 2266#ifdef CONFIG_QUOTA2267static int reiserfs_write_dquot(struct dquot *dquot)2268{2269 struct reiserfs_transaction_handle th;2270 int ret, err;2271 int depth;2272 2273 reiserfs_write_lock(dquot->dq_sb);2274 ret =2275 journal_begin(&th, dquot->dq_sb,2276 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));2277 if (ret)2278 goto out;2279 depth = reiserfs_write_unlock_nested(dquot->dq_sb);2280 ret = dquot_commit(dquot);2281 reiserfs_write_lock_nested(dquot->dq_sb, depth);2282 err = journal_end(&th);2283 if (!ret && err)2284 ret = err;2285out:2286 reiserfs_write_unlock(dquot->dq_sb);2287 return ret;2288}2289 2290static int reiserfs_acquire_dquot(struct dquot *dquot)2291{2292 struct reiserfs_transaction_handle th;2293 int ret, err;2294 int depth;2295 2296 reiserfs_write_lock(dquot->dq_sb);2297 ret =2298 journal_begin(&th, dquot->dq_sb,2299 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));2300 if (ret)2301 goto out;2302 depth = reiserfs_write_unlock_nested(dquot->dq_sb);2303 ret = dquot_acquire(dquot);2304 reiserfs_write_lock_nested(dquot->dq_sb, depth);2305 err = journal_end(&th);2306 if (!ret && err)2307 ret = err;2308out:2309 reiserfs_write_unlock(dquot->dq_sb);2310 return ret;2311}2312 2313static int reiserfs_release_dquot(struct dquot *dquot)2314{2315 struct reiserfs_transaction_handle th;2316 int ret, err;2317 2318 reiserfs_write_lock(dquot->dq_sb);2319 ret =2320 journal_begin(&th, dquot->dq_sb,2321 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));2322 reiserfs_write_unlock(dquot->dq_sb);2323 if (ret) {2324 /* Release dquot anyway to avoid endless cycle in dqput() */2325 dquot_release(dquot);2326 goto out;2327 }2328 ret = dquot_release(dquot);2329 reiserfs_write_lock(dquot->dq_sb);2330 err = journal_end(&th);2331 if (!ret && err)2332 ret = err;2333 reiserfs_write_unlock(dquot->dq_sb);2334out:2335 return ret;2336}2337 2338static int reiserfs_mark_dquot_dirty(struct dquot *dquot)2339{2340 /* Are we journaling quotas? */2341 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||2342 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {2343 dquot_mark_dquot_dirty(dquot);2344 return reiserfs_write_dquot(dquot);2345 } else2346 return dquot_mark_dquot_dirty(dquot);2347}2348 2349static int reiserfs_write_info(struct super_block *sb, int type)2350{2351 struct reiserfs_transaction_handle th;2352 int ret, err;2353 int depth;2354 2355 /* Data block + inode block */2356 reiserfs_write_lock(sb);2357 ret = journal_begin(&th, sb, 2);2358 if (ret)2359 goto out;2360 depth = reiserfs_write_unlock_nested(sb);2361 ret = dquot_commit_info(sb, type);2362 reiserfs_write_lock_nested(sb, depth);2363 err = journal_end(&th);2364 if (!ret && err)2365 ret = err;2366out:2367 reiserfs_write_unlock(sb);2368 return ret;2369}2370 2371/*2372 * Turn on quotas during mount time - we need to find the quota file and such...2373 */2374static int reiserfs_quota_on_mount(struct super_block *sb, int type)2375{2376 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],2377 REISERFS_SB(sb)->s_jquota_fmt, type);2378}2379 2380/*2381 * Standard function to be called on quota_on2382 */2383static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,2384 const struct path *path)2385{2386 int err;2387 struct inode *inode;2388 struct reiserfs_transaction_handle th;2389 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;2390 2391 reiserfs_write_lock(sb);2392 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) {2393 err = -EINVAL;2394 goto out;2395 }2396 2397 /* Quotafile not on the same filesystem? */2398 if (path->dentry->d_sb != sb) {2399 err = -EXDEV;2400 goto out;2401 }2402 inode = d_inode(path->dentry);2403 /*2404 * We must not pack tails for quota files on reiserfs for quota2405 * IO to work2406 */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 see2429 * all updates to the file when we bypass pagecache...2430 */2431 if (reiserfs_file_data_log(inode)) {2432 /* Just start temporary transaction and finish it */2433 err = journal_begin(&th, sb, 1);2434 if (err)2435 goto out;2436 err = journal_end_sync(&th);2437 if (err)2438 goto out;2439 }2440 reiserfs_write_unlock(sb);2441 err = dquot_quota_on(sb, type, format_id, path);2442 if (!err) {2443 inode_lock(inode);2444 REISERFS_I(inode)->i_attrs |= REISERFS_IMMUTABLE_FL |2445 REISERFS_NOATIME_FL;2446 inode_set_flags(inode, S_IMMUTABLE | S_NOATIME,2447 S_IMMUTABLE | S_NOATIME);2448 inode_unlock(inode);2449 mark_inode_dirty(inode);2450 }2451 return err;2452out:2453 reiserfs_write_unlock(sb);2454 return err;2455}2456 2457static int reiserfs_quota_off(struct super_block *sb, int type)2458{2459 int err;2460 struct inode *inode = sb_dqopt(sb)->files[type];2461 2462 if (!inode || !igrab(inode))2463 goto out;2464 2465 err = dquot_quota_off(sb, type);2466 if (err)2467 goto out_put;2468 2469 inode_lock(inode);2470 REISERFS_I(inode)->i_attrs &= ~(REISERFS_IMMUTABLE_FL |2471 REISERFS_NOATIME_FL);2472 inode_set_flags(inode, 0, S_IMMUTABLE | S_NOATIME);2473 inode_unlock(inode);2474 mark_inode_dirty(inode);2475out_put:2476 iput(inode);2477 return err;2478out:2479 return dquot_quota_off(sb, type);2480}2481 2482/*2483 * Read data from quotafile - avoid pagecache and such because we cannot afford2484 * acquiring the locks... As quota files are never truncated and quota code2485 * itself serializes the operations (and no one else should touch the files)2486 * we don't have to be afraid of races2487 */2488static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,2489 size_t len, loff_t off)2490{2491 struct inode *inode = sb_dqopt(sb)->files[type];2492 unsigned long blk = off >> sb->s_blocksize_bits;2493 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;2494 size_t toread;2495 struct buffer_head tmp_bh, *bh;2496 loff_t i_size = i_size_read(inode);2497 2498 if (off > i_size)2499 return 0;2500 if (off + len > i_size)2501 len = i_size - off;2502 toread = len;2503 while (toread > 0) {2504 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);2505 tmp_bh.b_state = 0;2506 /*2507 * Quota files are without tails so we can safely2508 * use this function2509 */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 has2534 * enough credits)2535 */2536static ssize_t reiserfs_quota_write(struct super_block *sb, int type,2537 const char *data, size_t len, loff_t off)2538{2539 struct inode *inode = sb_dqopt(sb)->files[type];2540 unsigned long blk = off >> sb->s_blocksize_bits;2541 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;2542 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;2543 size_t towrite = len;2544 struct buffer_head tmp_bh, *bh;2545 2546 if (!current->journal_info) {2547 printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n",2548 (unsigned long long)off, (unsigned long long)len);2549 return -EIO;2550 }2551 while (towrite > 0) {2552 tocopy = min_t(unsigned long, sb->s_blocksize - offset, towrite);2553 tmp_bh.b_state = 0;2554 reiserfs_write_lock(sb);2555 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);2556 reiserfs_write_unlock(sb);2557 if (err)2558 goto out;2559 if (offset || tocopy != sb->s_blocksize)2560 bh = sb_bread(sb, tmp_bh.b_blocknr);2561 else2562 bh = sb_getblk(sb, tmp_bh.b_blocknr);2563 if (!bh) {2564 err = -EIO;2565 goto out;2566 }2567 lock_buffer(bh);2568 memcpy(bh->b_data + offset, data, tocopy);2569 flush_dcache_page(bh->b_page);2570 set_buffer_uptodate(bh);2571 unlock_buffer(bh);2572 reiserfs_write_lock(sb);2573 reiserfs_prepare_for_journal(sb, bh, 1);2574 journal_mark_dirty(current->journal_info, bh);2575 if (!journal_quota)2576 reiserfs_add_ordered_list(inode, bh);2577 reiserfs_write_unlock(sb);2578 brelse(bh);2579 offset = 0;2580 towrite -= tocopy;2581 data += tocopy;2582 blk++;2583 }2584out:2585 if (len == towrite)2586 return err;2587 if (inode->i_size < off + len - towrite)2588 i_size_write(inode, off + len - towrite);2589 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));2590 mark_inode_dirty(inode);2591 return len - towrite;2592}2593 2594#endif2595 2596static struct dentry *get_super_block(struct file_system_type *fs_type,2597 int flags, const char *dev_name,2598 void *data)2599{2600 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);2601}2602 2603static int __init init_reiserfs_fs(void)2604{2605 int ret;2606 2607 ret = init_inodecache();2608 if (ret)2609 return ret;2610 2611 reiserfs_proc_info_global_init();2612 2613 ret = register_filesystem(&reiserfs_fs_type);2614 if (ret)2615 goto out;2616 2617 return 0;2618out:2619 reiserfs_proc_info_global_done();2620 destroy_inodecache();2621 2622 return ret;2623}2624 2625static void __exit exit_reiserfs_fs(void)2626{2627 reiserfs_proc_info_global_done();2628 unregister_filesystem(&reiserfs_fs_type);2629 destroy_inodecache();2630}2631 2632struct file_system_type reiserfs_fs_type = {2633 .owner = THIS_MODULE,2634 .name = "reiserfs",2635 .mount = get_super_block,2636 .kill_sb = reiserfs_kill_sb,2637 .fs_flags = FS_REQUIRES_DEV,2638};2639MODULE_ALIAS_FS("reiserfs");2640 2641MODULE_DESCRIPTION("ReiserFS journaled filesystem");2642MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");2643MODULE_LICENSE("GPL");2644 2645module_init(init_reiserfs_fs);2646module_exit(exit_reiserfs_fs);2647