| /* |
| * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README |
| * |
| * Trivial changes by Alan Cox to add the LFS fixes |
| * |
| * Trivial Changes: |
| * Rights granted to Hans Reiser to redistribute under other terms providing |
| * he accepts all liability including but not limited to patent, fitness |
| * for purpose, and direct or indirect claims arising from failure to perform. |
| * |
| * NO WARRANTY |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/vmalloc.h> |
| #include <linux/time.h> |
| #include <linux/uaccess.h> |
| #include "reiserfs.h" |
| #include "acl.h" |
| #include "xattr.h" |
| #include <linux/init.h> |
| #include <linux/blkdev.h> |
| #include <linux/buffer_head.h> |
| #include <linux/exportfs.h> |
| #include <linux/quotaops.h> |
| #include <linux/vfs.h> |
| #include <linux/mount.h> |
| #include <linux/namei.h> |
| #include <linux/crc32.h> |
| #include <linux/seq_file.h> |
| |
| struct file_system_type reiserfs_fs_type; |
| |
| static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING; |
| static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING; |
| static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING; |
| |
| int is_reiserfs_3_5(struct reiserfs_super_block *rs) |
| { |
| return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string, |
| strlen(reiserfs_3_5_magic_string)); |
| } |
| |
| int is_reiserfs_3_6(struct reiserfs_super_block *rs) |
| { |
| return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string, |
| strlen(reiserfs_3_6_magic_string)); |
| } |
| |
| int is_reiserfs_jr(struct reiserfs_super_block *rs) |
| { |
| return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string, |
| strlen(reiserfs_jr_magic_string)); |
| } |
| |
| static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs) |
| { |
| return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) || |
| is_reiserfs_jr(rs)); |
| } |
| |
| static int reiserfs_remount(struct super_block *s, int *flags, char *data); |
| static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf); |
| |
| static int reiserfs_sync_fs(struct super_block *s, int wait) |
| { |
| struct reiserfs_transaction_handle th; |
| |
| /* |
| * Writeback quota in non-journalled quota case - journalled quota has |
| * no dirty dquots |
| */ |
| dquot_writeback_dquots(s, -1); |
| reiserfs_write_lock(s); |
| if (!journal_begin(&th, s, 1)) |
| if (!journal_end_sync(&th)) |
| reiserfs_flush_old_commits(s); |
| reiserfs_write_unlock(s); |
| return 0; |
| } |
| |
| static void flush_old_commits(struct work_struct *work) |
| { |
| struct reiserfs_sb_info *sbi; |
| struct super_block *s; |
| |
| sbi = container_of(work, struct reiserfs_sb_info, old_work.work); |
| s = sbi->s_journal->j_work_sb; |
| |
| spin_lock(&sbi->old_work_lock); |
| sbi->work_queued = 0; |
| spin_unlock(&sbi->old_work_lock); |
| |
| reiserfs_sync_fs(s, 1); |
| } |
| |
| void reiserfs_schedule_old_flush(struct super_block *s) |
| { |
| struct reiserfs_sb_info *sbi = REISERFS_SB(s); |
| unsigned long delay; |
| |
| /* |
| * Avoid scheduling flush when sb is being shut down. It can race |
| * with journal shutdown and free still queued delayed work. |
| */ |
| if (s->s_flags & MS_RDONLY || !(s->s_flags & MS_ACTIVE)) |
| return; |
| |
| spin_lock(&sbi->old_work_lock); |
| if (!sbi->work_queued) { |
| delay = msecs_to_jiffies(dirty_writeback_interval * 10); |
| queue_delayed_work(system_long_wq, &sbi->old_work, delay); |
| sbi->work_queued = 1; |
| } |
| spin_unlock(&sbi->old_work_lock); |
| } |
| |
| static void cancel_old_flush(struct super_block *s) |
| { |
| struct reiserfs_sb_info *sbi = REISERFS_SB(s); |
| |
| cancel_delayed_work_sync(&REISERFS_SB(s)->old_work); |
| spin_lock(&sbi->old_work_lock); |
| sbi->work_queued = 0; |
| spin_unlock(&sbi->old_work_lock); |
| } |
| |
| static int reiserfs_freeze(struct super_block *s) |
| { |
| struct reiserfs_transaction_handle th; |
| |
| cancel_old_flush(s); |
| |
| reiserfs_write_lock(s); |
| if (!(s->s_flags & MS_RDONLY)) { |
| int err = journal_begin(&th, s, 1); |
| if (err) { |
| reiserfs_block_writes(&th); |
| } else { |
| reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), |
| 1); |
| journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
| reiserfs_block_writes(&th); |
| journal_end_sync(&th); |
| } |
| } |
| reiserfs_write_unlock(s); |
| return 0; |
| } |
| |
| static int reiserfs_unfreeze(struct super_block *s) |
| { |
| reiserfs_allow_writes(s); |
| return 0; |
| } |
| |
| extern const struct in_core_key MAX_IN_CORE_KEY; |
| |
| /* |
| * this is used to delete "save link" when there are no items of a |
| * file it points to. It can either happen if unlink is completed but |
| * "save unlink" removal, or if file has both unlink and truncate |
| * pending and as unlink completes first (because key of "save link" |
| * protecting unlink is bigger that a key lf "save link" which |
| * protects truncate), so there left no items to make truncate |
| * completion on |
| */ |
| static int remove_save_link_only(struct super_block *s, |
| struct reiserfs_key *key, int oid_free) |
| { |
| struct reiserfs_transaction_handle th; |
| int err; |
| |
| /* we are going to do one balancing */ |
| err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT); |
| if (err) |
| return err; |
| |
| reiserfs_delete_solid_item(&th, NULL, key); |
| if (oid_free) |
| /* removals are protected by direct items */ |
| reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid)); |
| |
| return journal_end(&th); |
| } |
| |
| #ifdef CONFIG_QUOTA |
| static int reiserfs_quota_on_mount(struct super_block *, int); |
| #endif |
| |
| /* look for uncompleted unlinks and truncates and complete them */ |
| static int finish_unfinished(struct super_block *s) |
| { |
| INITIALIZE_PATH(path); |
| struct cpu_key max_cpu_key, obj_key; |
| struct reiserfs_key save_link_key, last_inode_key; |
| int retval = 0; |
| struct item_head *ih; |
| struct buffer_head *bh; |
| int item_pos; |
| char *item; |
| int done; |
| struct inode *inode; |
| int truncate; |
| #ifdef CONFIG_QUOTA |
| int i; |
| int ms_active_set; |
| int quota_enabled[REISERFS_MAXQUOTAS]; |
| #endif |
| |
| /* compose key to look for "save" links */ |
| max_cpu_key.version = KEY_FORMAT_3_5; |
| max_cpu_key.on_disk_key.k_dir_id = ~0U; |
| max_cpu_key.on_disk_key.k_objectid = ~0U; |
| set_cpu_key_k_offset(&max_cpu_key, ~0U); |
| max_cpu_key.key_length = 3; |
| |
| memset(&last_inode_key, 0, sizeof(last_inode_key)); |
| |
| #ifdef CONFIG_QUOTA |
| /* Needed for iput() to work correctly and not trash data */ |
| if (s->s_flags & MS_ACTIVE) { |
| ms_active_set = 0; |
| } else { |
| ms_active_set = 1; |
| s->s_flags |= MS_ACTIVE; |
| } |
| /* Turn on quotas so that they are updated correctly */ |
| for (i = 0; i < REISERFS_MAXQUOTAS; i++) { |
| quota_enabled[i] = 1; |
| if (REISERFS_SB(s)->s_qf_names[i]) { |
| int ret; |
| |
| if (sb_has_quota_active(s, i)) { |
| quota_enabled[i] = 0; |
| continue; |
| } |
| ret = reiserfs_quota_on_mount(s, i); |
| if (ret < 0) |
| reiserfs_warning(s, "reiserfs-2500", |
| "cannot turn on journaled " |
| "quota: error %d", ret); |
| } |
| } |
| #endif |
| |
| done = 0; |
| REISERFS_SB(s)->s_is_unlinked_ok = 1; |
| while (!retval) { |
| int depth; |
| retval = search_item(s, &max_cpu_key, &path); |
| if (retval != ITEM_NOT_FOUND) { |
| reiserfs_error(s, "vs-2140", |
| "search_by_key returned %d", retval); |
| break; |
| } |
| |
| bh = get_last_bh(&path); |
| item_pos = get_item_pos(&path); |
| if (item_pos != B_NR_ITEMS(bh)) { |
| reiserfs_warning(s, "vs-2060", |
| "wrong position found"); |
| break; |
| } |
| item_pos--; |
| ih = item_head(bh, item_pos); |
| |
| if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) |
| /* there are no "save" links anymore */ |
| break; |
| |
| save_link_key = ih->ih_key; |
| if (is_indirect_le_ih(ih)) |
| truncate = 1; |
| else |
| truncate = 0; |
| |
| /* reiserfs_iget needs k_dirid and k_objectid only */ |
| item = ih_item_body(bh, ih); |
| obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item); |
| obj_key.on_disk_key.k_objectid = |
| le32_to_cpu(ih->ih_key.k_objectid); |
| obj_key.on_disk_key.k_offset = 0; |
| obj_key.on_disk_key.k_type = 0; |
| |
| pathrelse(&path); |
| |
| inode = reiserfs_iget(s, &obj_key); |
| if (!inode) { |
| /* |
| * the unlink almost completed, it just did not |
| * manage to remove "save" link and release objectid |
| */ |
| reiserfs_warning(s, "vs-2180", "iget failed for %K", |
| &obj_key); |
| retval = remove_save_link_only(s, &save_link_key, 1); |
| continue; |
| } |
| |
| if (!truncate && inode->i_nlink) { |
| /* file is not unlinked */ |
| reiserfs_warning(s, "vs-2185", |
| "file %K is not unlinked", |
| &obj_key); |
| retval = remove_save_link_only(s, &save_link_key, 0); |
| continue; |
| } |
| depth = reiserfs_write_unlock_nested(inode->i_sb); |
| dquot_initialize(inode); |
| reiserfs_write_lock_nested(inode->i_sb, depth); |
| |
| if (truncate && S_ISDIR(inode->i_mode)) { |
| /* |
| * We got a truncate request for a dir which |
| * is impossible. The only imaginable way is to |
| * execute unfinished truncate request then boot |
| * into old kernel, remove the file and create dir |
| * with the same key. |
| */ |
| reiserfs_warning(s, "green-2101", |
| "impossible truncate on a " |
| "directory %k. Please report", |
| INODE_PKEY(inode)); |
| retval = remove_save_link_only(s, &save_link_key, 0); |
| truncate = 0; |
| iput(inode); |
| continue; |
| } |
| |
| if (truncate) { |
| REISERFS_I(inode)->i_flags |= |
| i_link_saved_truncate_mask; |
| /* |
| * not completed truncate found. New size was |
| * committed together with "save" link |
| */ |
| reiserfs_info(s, "Truncating %k to %lld ..", |
| INODE_PKEY(inode), inode->i_size); |
| |
| /* don't update modification time */ |
| reiserfs_truncate_file(inode, 0); |
| |
| retval = remove_save_link(inode, truncate); |
| } else { |
| REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; |
| /* not completed unlink (rmdir) found */ |
| reiserfs_info(s, "Removing %k..", INODE_PKEY(inode)); |
| if (memcmp(&last_inode_key, INODE_PKEY(inode), |
| sizeof(last_inode_key))){ |
| last_inode_key = *INODE_PKEY(inode); |
| /* removal gets completed in iput */ |
| retval = 0; |
| } else { |
| reiserfs_warning(s, "super-2189", "Dead loop " |
| "in finish_unfinished " |
| "detected, just remove " |
| "save link\n"); |
| retval = remove_save_link_only(s, |
| &save_link_key, 0); |
| } |
| } |
| |
| iput(inode); |
| printk("done\n"); |
| done++; |
| } |
| REISERFS_SB(s)->s_is_unlinked_ok = 0; |
| |
| #ifdef CONFIG_QUOTA |
| /* Turn quotas off */ |
| reiserfs_write_unlock(s); |
| for (i = 0; i < REISERFS_MAXQUOTAS; i++) { |
| if (sb_dqopt(s)->files[i] && quota_enabled[i]) |
| dquot_quota_off(s, i); |
| } |
| reiserfs_write_lock(s); |
| if (ms_active_set) |
| /* Restore the flag back */ |
| s->s_flags &= ~MS_ACTIVE; |
| #endif |
| pathrelse(&path); |
| if (done) |
| reiserfs_info(s, "There were %d uncompleted unlinks/truncates. " |
| "Completed\n", done); |
| return retval; |
| } |
| |
| /* |
| * to protect file being unlinked from getting lost we "safe" link files |
| * being unlinked. This link will be deleted in the same transaction with last |
| * item of file. mounting the filesystem we scan all these links and remove |
| * files which almost got lost |
| */ |
| void add_save_link(struct reiserfs_transaction_handle *th, |
| struct inode *inode, int truncate) |
| { |
| INITIALIZE_PATH(path); |
| int retval; |
| struct cpu_key key; |
| struct item_head ih; |
| __le32 link; |
| |
| BUG_ON(!th->t_trans_id); |
| |
| /* file can only get one "save link" of each kind */ |
| RFALSE(truncate && |
| (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask), |
| "saved link already exists for truncated inode %lx", |
| (long)inode->i_ino); |
| RFALSE(!truncate && |
| (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask), |
| "saved link already exists for unlinked inode %lx", |
| (long)inode->i_ino); |
| |
| /* setup key of "save" link */ |
| key.version = KEY_FORMAT_3_5; |
| key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; |
| key.on_disk_key.k_objectid = inode->i_ino; |
| if (!truncate) { |
| /* unlink, rmdir, rename */ |
| set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize); |
| set_cpu_key_k_type(&key, TYPE_DIRECT); |
| |
| /* item head of "safe" link */ |
| make_le_item_head(&ih, &key, key.version, |
| 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, |
| 4 /*length */ , 0xffff /*free space */ ); |
| } else { |
| /* truncate */ |
| if (S_ISDIR(inode->i_mode)) |
| reiserfs_warning(inode->i_sb, "green-2102", |
| "Adding a truncate savelink for " |
| "a directory %k! Please report", |
| INODE_PKEY(inode)); |
| set_cpu_key_k_offset(&key, 1); |
| set_cpu_key_k_type(&key, TYPE_INDIRECT); |
| |
| /* item head of "safe" link */ |
| make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT, |
| 4 /*length */ , 0 /*free space */ ); |
| } |
| key.key_length = 3; |
| |
| /* look for its place in the tree */ |
| retval = search_item(inode->i_sb, &key, &path); |
| if (retval != ITEM_NOT_FOUND) { |
| if (retval != -ENOSPC) |
| reiserfs_error(inode->i_sb, "vs-2100", |
| "search_by_key (%K) returned %d", &key, |
| retval); |
| pathrelse(&path); |
| return; |
| } |
| |
| /* body of "save" link */ |
| link = INODE_PKEY(inode)->k_dir_id; |
| |
| /* put "save" link into tree, don't charge quota to anyone */ |
| retval = |
| reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link); |
| if (retval) { |
| if (retval != -ENOSPC) |
| reiserfs_error(inode->i_sb, "vs-2120", |
| "insert_item returned %d", retval); |
| } else { |
| if (truncate) |
| REISERFS_I(inode)->i_flags |= |
| i_link_saved_truncate_mask; |
| else |
| REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; |
| } |
| } |
| |
| /* this opens transaction unlike add_save_link */ |
| int remove_save_link(struct inode *inode, int truncate) |
| { |
| struct reiserfs_transaction_handle th; |
| struct reiserfs_key key; |
| int err; |
| |
| /* we are going to do one balancing only */ |
| err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); |
| if (err) |
| return err; |
| |
| /* setup key of "save" link */ |
| key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID); |
| key.k_objectid = INODE_PKEY(inode)->k_objectid; |
| if (!truncate) { |
| /* unlink, rmdir, rename */ |
| set_le_key_k_offset(KEY_FORMAT_3_5, &key, |
| 1 + inode->i_sb->s_blocksize); |
| set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT); |
| } else { |
| /* truncate */ |
| set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1); |
| set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT); |
| } |
| |
| if ((truncate && |
| (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) || |
| (!truncate && |
| (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask))) |
| /* don't take quota bytes from anywhere */ |
| reiserfs_delete_solid_item(&th, NULL, &key); |
| if (!truncate) { |
| reiserfs_release_objectid(&th, inode->i_ino); |
| REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask; |
| } else |
| REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask; |
| |
| return journal_end(&th); |
| } |
| |
| static void reiserfs_kill_sb(struct super_block *s) |
| { |
| if (REISERFS_SB(s)) { |
| reiserfs_proc_info_done(s); |
| /* |
| * Force any pending inode evictions to occur now. Any |
| * inodes to be removed that have extended attributes |
| * associated with them need to clean them up before |
| * we can release the extended attribute root dentries. |
| * shrink_dcache_for_umount will BUG if we don't release |
| * those before it's called so ->put_super is too late. |
| */ |
| shrink_dcache_sb(s); |
| |
| dput(REISERFS_SB(s)->xattr_root); |
| REISERFS_SB(s)->xattr_root = NULL; |
| dput(REISERFS_SB(s)->priv_root); |
| REISERFS_SB(s)->priv_root = NULL; |
| } |
| |
| kill_block_super(s); |
| } |
| |
| static void reiserfs_put_super(struct super_block *s) |
| { |
| struct reiserfs_transaction_handle th; |
| th.t_trans_id = 0; |
| |
| dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
| |
| reiserfs_write_lock(s); |
| |
| /* |
| * change file system state to current state if it was mounted |
| * with read-write permissions |
| */ |
| if (!(s->s_flags & MS_RDONLY)) { |
| if (!journal_begin(&th, s, 10)) { |
| reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), |
| 1); |
| set_sb_umount_state(SB_DISK_SUPER_BLOCK(s), |
| REISERFS_SB(s)->s_mount_state); |
| journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
| } |
| } |
| |
| /* |
| * note, journal_release checks for readonly mount, and can |
| * decide not to do a journal_end |
| */ |
| journal_release(&th, s); |
| |
| reiserfs_free_bitmap_cache(s); |
| |
| brelse(SB_BUFFER_WITH_SB(s)); |
| |
| print_statistics(s); |
| |
| if (REISERFS_SB(s)->reserved_blocks != 0) { |
| reiserfs_warning(s, "green-2005", "reserved blocks left %d", |
| REISERFS_SB(s)->reserved_blocks); |
| } |
| |
| reiserfs_write_unlock(s); |
| mutex_destroy(&REISERFS_SB(s)->lock); |
| destroy_workqueue(REISERFS_SB(s)->commit_wq); |
| kfree(s->s_fs_info); |
| s->s_fs_info = NULL; |
| } |
| |
| static struct kmem_cache *reiserfs_inode_cachep; |
| |
| static struct inode *reiserfs_alloc_inode(struct super_block *sb) |
| { |
| struct reiserfs_inode_info *ei; |
| ei = (struct reiserfs_inode_info *) |
| kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL); |
| if (!ei) |
| return NULL; |
| atomic_set(&ei->openers, 0); |
| mutex_init(&ei->tailpack); |
| #ifdef CONFIG_QUOTA |
| memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); |
| #endif |
| |
| return &ei->vfs_inode; |
| } |
| |
| static void reiserfs_i_callback(struct rcu_head *head) |
| { |
| struct inode *inode = container_of(head, struct inode, i_rcu); |
| kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); |
| } |
| |
| static void reiserfs_destroy_inode(struct inode *inode) |
| { |
| call_rcu(&inode->i_rcu, reiserfs_i_callback); |
| } |
| |
| static void init_once(void *foo) |
| { |
| struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo; |
| |
| INIT_LIST_HEAD(&ei->i_prealloc_list); |
| inode_init_once(&ei->vfs_inode); |
| } |
| |
| static int __init init_inodecache(void) |
| { |
| reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", |
| sizeof(struct |
| reiserfs_inode_info), |
| 0, (SLAB_RECLAIM_ACCOUNT| |
| SLAB_MEM_SPREAD), |
| init_once); |
| if (reiserfs_inode_cachep == NULL) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| static void destroy_inodecache(void) |
| { |
| /* |
| * Make sure all delayed rcu free inodes are flushed before we |
| * destroy cache. |
| */ |
| rcu_barrier(); |
| kmem_cache_destroy(reiserfs_inode_cachep); |
| } |
| |
| /* we don't mark inodes dirty, we just log them */ |
| static void reiserfs_dirty_inode(struct inode *inode, int flags) |
| { |
| struct reiserfs_transaction_handle th; |
| |
| int err = 0; |
| |
| if (inode->i_sb->s_flags & MS_RDONLY) { |
| reiserfs_warning(inode->i_sb, "clm-6006", |
| "writing inode %lu on readonly FS", |
| inode->i_ino); |
| return; |
| } |
| reiserfs_write_lock(inode->i_sb); |
| |
| /* |
| * this is really only used for atime updates, so they don't have |
| * to be included in O_SYNC or fsync |
| */ |
| err = journal_begin(&th, inode->i_sb, 1); |
| if (err) |
| goto out; |
| |
| reiserfs_update_sd(&th, inode); |
| journal_end(&th); |
| |
| out: |
| reiserfs_write_unlock(inode->i_sb); |
| } |
| |
| static int reiserfs_show_options(struct seq_file *seq, struct dentry *root) |
| { |
| struct super_block *s = root->d_sb; |
| struct reiserfs_journal *journal = SB_JOURNAL(s); |
| long opts = REISERFS_SB(s)->s_mount_opt; |
| |
| if (opts & (1 << REISERFS_LARGETAIL)) |
| seq_puts(seq, ",tails=on"); |
| else if (!(opts & (1 << REISERFS_SMALLTAIL))) |
| seq_puts(seq, ",notail"); |
| /* tails=small is default so we don't show it */ |
| |
| if (!(opts & (1 << REISERFS_BARRIER_FLUSH))) |
| seq_puts(seq, ",barrier=none"); |
| /* barrier=flush is default so we don't show it */ |
| |
| if (opts & (1 << REISERFS_ERROR_CONTINUE)) |
| seq_puts(seq, ",errors=continue"); |
| else if (opts & (1 << REISERFS_ERROR_PANIC)) |
| seq_puts(seq, ",errors=panic"); |
| /* errors=ro is default so we don't show it */ |
| |
| if (opts & (1 << REISERFS_DATA_LOG)) |
| seq_puts(seq, ",data=journal"); |
| else if (opts & (1 << REISERFS_DATA_WRITEBACK)) |
| seq_puts(seq, ",data=writeback"); |
| /* data=ordered is default so we don't show it */ |
| |
| if (opts & (1 << REISERFS_ATTRS)) |
| seq_puts(seq, ",attrs"); |
| |
| if (opts & (1 << REISERFS_XATTRS_USER)) |
| seq_puts(seq, ",user_xattr"); |
| |
| if (opts & (1 << REISERFS_EXPOSE_PRIVROOT)) |
| seq_puts(seq, ",expose_privroot"); |
| |
| if (opts & (1 << REISERFS_POSIXACL)) |
| seq_puts(seq, ",acl"); |
| |
| if (REISERFS_SB(s)->s_jdev) |
| seq_printf(seq, ",jdev=%s", REISERFS_SB(s)->s_jdev); |
| |
| if (journal->j_max_commit_age != journal->j_default_max_commit_age) |
| seq_printf(seq, ",commit=%d", journal->j_max_commit_age); |
| |
| #ifdef CONFIG_QUOTA |
| if (REISERFS_SB(s)->s_qf_names[USRQUOTA]) |
| seq_printf(seq, ",usrjquota=%s", REISERFS_SB(s)->s_qf_names[USRQUOTA]); |
| else if (opts & (1 << REISERFS_USRQUOTA)) |
| seq_puts(seq, ",usrquota"); |
| if (REISERFS_SB(s)->s_qf_names[GRPQUOTA]) |
| seq_printf(seq, ",grpjquota=%s", REISERFS_SB(s)->s_qf_names[GRPQUOTA]); |
| else if (opts & (1 << REISERFS_GRPQUOTA)) |
| seq_puts(seq, ",grpquota"); |
| if (REISERFS_SB(s)->s_jquota_fmt) { |
| if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD) |
| seq_puts(seq, ",jqfmt=vfsold"); |
| else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0) |
| seq_puts(seq, ",jqfmt=vfsv0"); |
| } |
| #endif |
| |
| /* Block allocator options */ |
| if (opts & (1 << REISERFS_NO_BORDER)) |
| seq_puts(seq, ",block-allocator=noborder"); |
| if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION)) |
| seq_puts(seq, ",block-allocator=no_unhashed_relocation"); |
| if (opts & (1 << REISERFS_HASHED_RELOCATION)) |
| seq_puts(seq, ",block-allocator=hashed_relocation"); |
| if (opts & (1 << REISERFS_TEST4)) |
| seq_puts(seq, ",block-allocator=test4"); |
| show_alloc_options(seq, s); |
| return 0; |
| } |
| |
| #ifdef CONFIG_QUOTA |
| static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, |
| size_t, loff_t); |
| static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, |
| loff_t); |
| |
| static struct dquot **reiserfs_get_dquots(struct inode *inode) |
| { |
| return REISERFS_I(inode)->i_dquot; |
| } |
| #endif |
| |
| static const struct super_operations reiserfs_sops = { |
| .alloc_inode = reiserfs_alloc_inode, |
| .destroy_inode = reiserfs_destroy_inode, |
| .write_inode = reiserfs_write_inode, |
| .dirty_inode = reiserfs_dirty_inode, |
| .evict_inode = reiserfs_evict_inode, |
| .put_super = reiserfs_put_super, |
| .sync_fs = reiserfs_sync_fs, |
| .freeze_fs = reiserfs_freeze, |
| .unfreeze_fs = reiserfs_unfreeze, |
| .statfs = reiserfs_statfs, |
| .remount_fs = reiserfs_remount, |
| .show_options = reiserfs_show_options, |
| #ifdef CONFIG_QUOTA |
| .quota_read = reiserfs_quota_read, |
| .quota_write = reiserfs_quota_write, |
| .get_dquots = reiserfs_get_dquots, |
| #endif |
| }; |
| |
| #ifdef CONFIG_QUOTA |
| #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") |
| |
| static int reiserfs_write_dquot(struct dquot *); |
| static int reiserfs_acquire_dquot(struct dquot *); |
| static int reiserfs_release_dquot(struct dquot *); |
| static int reiserfs_mark_dquot_dirty(struct dquot *); |
| static int reiserfs_write_info(struct super_block *, int); |
| static int reiserfs_quota_on(struct super_block *, int, int, struct path *); |
| |
| static const struct dquot_operations reiserfs_quota_operations = { |
| .write_dquot = reiserfs_write_dquot, |
| .acquire_dquot = reiserfs_acquire_dquot, |
| .release_dquot = reiserfs_release_dquot, |
| .mark_dirty = reiserfs_mark_dquot_dirty, |
| .write_info = reiserfs_write_info, |
| .alloc_dquot = dquot_alloc, |
| .destroy_dquot = dquot_destroy, |
| }; |
| |
| static const struct quotactl_ops reiserfs_qctl_operations = { |
| .quota_on = reiserfs_quota_on, |
| .quota_off = dquot_quota_off, |
| .quota_sync = dquot_quota_sync, |
| .get_state = dquot_get_state, |
| .set_info = dquot_set_dqinfo, |
| .get_dqblk = dquot_get_dqblk, |
| .set_dqblk = dquot_set_dqblk, |
| }; |
| #endif |
| |
| static const struct export_operations reiserfs_export_ops = { |
| .encode_fh = reiserfs_encode_fh, |
| .fh_to_dentry = reiserfs_fh_to_dentry, |
| .fh_to_parent = reiserfs_fh_to_parent, |
| .get_parent = reiserfs_get_parent, |
| }; |
| |
| /* |
| * this struct is used in reiserfs_getopt () for containing the value for |
| * those mount options that have values rather than being toggles. |
| */ |
| typedef struct { |
| char *value; |
| /* |
| * bitmask which is to set on mount_options bitmask |
| * when this value is found, 0 is no bits are to be changed. |
| */ |
| int setmask; |
| /* |
| * bitmask which is to clear on mount_options bitmask |
| * when this value is found, 0 is no bits are to be changed. |
| * This is applied BEFORE setmask |
| */ |
| int clrmask; |
| } arg_desc_t; |
| |
| /* Set this bit in arg_required to allow empty arguments */ |
| #define REISERFS_OPT_ALLOWEMPTY 31 |
| |
| /* |
| * this struct is used in reiserfs_getopt() for describing the |
| * set of reiserfs mount options |
| */ |
| typedef struct { |
| char *option_name; |
| |
| /* 0 if argument is not required, not 0 otherwise */ |
| int arg_required; |
| |
| /* list of values accepted by an option */ |
| const arg_desc_t *values; |
| |
| /* |
| * bitmask which is to set on mount_options bitmask |
| * when this value is found, 0 is no bits are to be changed. |
| */ |
| int setmask; |
| |
| /* |
| * bitmask which is to clear on mount_options bitmask |
| * when this value is found, 0 is no bits are to be changed. |
| * This is applied BEFORE setmask |
| */ |
| int clrmask; |
| } opt_desc_t; |
| |
| /* possible values for -o data= */ |
| static const arg_desc_t logging_mode[] = { |
| {"ordered", 1 << REISERFS_DATA_ORDERED, |
| (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)}, |
| {"journal", 1 << REISERFS_DATA_LOG, |
| (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)}, |
| {"writeback", 1 << REISERFS_DATA_WRITEBACK, |
| (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)}, |
| {.value = NULL} |
| }; |
| |
| /* possible values for -o barrier= */ |
| static const arg_desc_t barrier_mode[] = { |
| {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH}, |
| {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE}, |
| {.value = NULL} |
| }; |
| |
| /* |
| * possible values for "-o block-allocator=" and bits which are to be set in |
| * s_mount_opt of reiserfs specific part of in-core super block |
| */ |
| static const arg_desc_t balloc[] = { |
| {"noborder", 1 << REISERFS_NO_BORDER, 0}, |
| {"border", 0, 1 << REISERFS_NO_BORDER}, |
| {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0}, |
| {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0}, |
| {"test4", 1 << REISERFS_TEST4, 0}, |
| {"notest4", 0, 1 << REISERFS_TEST4}, |
| {NULL, 0, 0} |
| }; |
| |
| static const arg_desc_t tails[] = { |
| {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL}, |
| {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, |
| {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL}, |
| {NULL, 0, 0} |
| }; |
| |
| static const arg_desc_t error_actions[] = { |
| {"panic", 1 << REISERFS_ERROR_PANIC, |
| (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, |
| {"ro-remount", 1 << REISERFS_ERROR_RO, |
| (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, |
| #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG |
| {"continue", 1 << REISERFS_ERROR_CONTINUE, |
| (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, |
| #endif |
| {NULL, 0, 0}, |
| }; |
| |
| /* |
| * proceed only one option from a list *cur - string containing of mount |
| * options |
| * opts - array of options which are accepted |
| * opt_arg - if option is found and requires an argument and if it is specifed |
| * in the input - pointer to the argument is stored here |
| * bit_flags - if option requires to set a certain bit - it is set here |
| * return -1 if unknown option is found, opt->arg_required otherwise |
| */ |
| static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts, |
| char **opt_arg, unsigned long *bit_flags) |
| { |
| char *p; |
| /* |
| * foo=bar, |
| * ^ ^ ^ |
| * | | +-- option_end |
| * | +-- arg_start |
| * +-- option_start |
| */ |
| const opt_desc_t *opt; |
| const arg_desc_t *arg; |
| |
| p = *cur; |
| |
| /* assume argument cannot contain commas */ |
| *cur = strchr(p, ','); |
| if (*cur) { |
| *(*cur) = '\0'; |
| (*cur)++; |
| } |
| |
| if (!strncmp(p, "alloc=", 6)) { |
| /* |
| * Ugly special case, probably we should redo options |
| * parser so that it can understand several arguments for |
| * some options, also so that it can fill several bitfields |
| * with option values. |
| */ |
| if (reiserfs_parse_alloc_options(s, p + 6)) { |
| return -1; |
| } else { |
| return 0; |
| } |
| } |
| |
| /* for every option in the list */ |
| for (opt = opts; opt->option_name; opt++) { |
| if (!strncmp(p, opt->option_name, strlen(opt->option_name))) { |
| if (bit_flags) { |
| if (opt->clrmask == |
| (1 << REISERFS_UNSUPPORTED_OPT)) |
| reiserfs_warning(s, "super-6500", |
| "%s not supported.\n", |
| p); |
| else |
| *bit_flags &= ~opt->clrmask; |
| if (opt->setmask == |
| (1 << REISERFS_UNSUPPORTED_OPT)) |
| reiserfs_warning(s, "super-6501", |
| "%s not supported.\n", |
| p); |
| else |
| *bit_flags |= opt->setmask; |
| } |
| break; |
| } |
| } |
| if (!opt->option_name) { |
| reiserfs_warning(s, "super-6502", |
| "unknown mount option \"%s\"", p); |
| return -1; |
| } |
| |
| p += strlen(opt->option_name); |
| switch (*p) { |
| case '=': |
| if (!opt->arg_required) { |
| reiserfs_warning(s, "super-6503", |
| "the option \"%s\" does not " |
| "require an argument\n", |
| opt->option_name); |
| return -1; |
| } |
| break; |
| |
| case 0: |
| if (opt->arg_required) { |
| reiserfs_warning(s, "super-6504", |
| "the option \"%s\" requires an " |
| "argument\n", opt->option_name); |
| return -1; |
| } |
| break; |
| default: |
| reiserfs_warning(s, "super-6505", |
| "head of option \"%s\" is only correct\n", |
| opt->option_name); |
| return -1; |
| } |
| |
| /* |
| * move to the argument, or to next option if argument is not |
| * required |
| */ |
| p++; |
| |
| if (opt->arg_required |
| && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY)) |
| && !strlen(p)) { |
| /* this catches "option=," if not allowed */ |
| reiserfs_warning(s, "super-6506", |
| "empty argument for \"%s\"\n", |
| opt->option_name); |
| return -1; |
| } |
| |
| if (!opt->values) { |
| /* *=NULLopt_arg contains pointer to argument */ |
| *opt_arg = p; |
| return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY); |
| } |
| |
| /* values possible for this option are listed in opt->values */ |
| for (arg = opt->values; arg->value; arg++) { |
| if (!strcmp(p, arg->value)) { |
| if (bit_flags) { |
| *bit_flags &= ~arg->clrmask; |
| *bit_flags |= arg->setmask; |
| } |
| return opt->arg_required; |
| } |
| } |
| |
| reiserfs_warning(s, "super-6506", |
| "bad value \"%s\" for option \"%s\"\n", p, |
| opt->option_name); |
| return -1; |
| } |
| |
| /* returns 0 if something is wrong in option string, 1 - otherwise */ |
| static int reiserfs_parse_options(struct super_block *s, |
| |
| /* string given via mount's -o */ |
| char *options, |
| |
| /* |
| * after the parsing phase, contains the |
| * collection of bitflags defining what |
| * mount options were selected. |
| */ |
| unsigned long *mount_options, |
| |
| /* strtol-ed from NNN of resize=NNN */ |
| unsigned long *blocks, |
| char **jdev_name, |
| unsigned int *commit_max_age, |
| char **qf_names, |
| unsigned int *qfmt) |
| { |
| int c; |
| char *arg = NULL; |
| char *pos; |
| opt_desc_t opts[] = { |
| /* |
| * Compatibility stuff, so that -o notail for old |
| * setups still work |
| */ |
| {"tails",.arg_required = 't',.values = tails}, |
| {"notail",.clrmask = |
| (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, |
| {"conv",.setmask = 1 << REISERFS_CONVERT}, |
| {"attrs",.setmask = 1 << REISERFS_ATTRS}, |
| {"noattrs",.clrmask = 1 << REISERFS_ATTRS}, |
| {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT}, |
| #ifdef CONFIG_REISERFS_FS_XATTR |
| {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER}, |
| {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER}, |
| #else |
| {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
| {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
| #endif |
| #ifdef CONFIG_REISERFS_FS_POSIX_ACL |
| {"acl",.setmask = 1 << REISERFS_POSIXACL}, |
| {"noacl",.clrmask = 1 << REISERFS_POSIXACL}, |
| #else |
| {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
| {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
| #endif |
| {.option_name = "nolog"}, |
| {"replayonly",.setmask = 1 << REPLAYONLY}, |
| {"block-allocator",.arg_required = 'a',.values = balloc}, |
| {"data",.arg_required = 'd',.values = logging_mode}, |
| {"barrier",.arg_required = 'b',.values = barrier_mode}, |
| {"resize",.arg_required = 'r',.values = NULL}, |
| {"jdev",.arg_required = 'j',.values = NULL}, |
| {"nolargeio",.arg_required = 'w',.values = NULL}, |
| {"commit",.arg_required = 'c',.values = NULL}, |
| {"usrquota",.setmask = 1 << REISERFS_USRQUOTA}, |
| {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA}, |
| {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA}, |
| {"errors",.arg_required = 'e',.values = error_actions}, |
| {"usrjquota",.arg_required = |
| 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, |
| {"grpjquota",.arg_required = |
| 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, |
| {"jqfmt",.arg_required = 'f',.values = NULL}, |
| {.option_name = NULL} |
| }; |
| |
| *blocks = 0; |
| if (!options || !*options) |
| /* |
| * use default configuration: create tails, journaling on, no |
| * conversion to newest format |
| */ |
| return 1; |
| |
| for (pos = options; pos;) { |
| c = reiserfs_getopt(s, &pos, opts, &arg, mount_options); |
| if (c == -1) |
| /* wrong option is given */ |
| return 0; |
| |
| if (c == 'r') { |
| char *p; |
| |
| p = NULL; |
| /* "resize=NNN" or "resize=auto" */ |
| |
| if (!strcmp(arg, "auto")) { |
| /* From JFS code, to auto-get the size. */ |
| *blocks = |
| s->s_bdev->bd_inode->i_size >> s-> |
| s_blocksize_bits; |
| } else { |
| *blocks = simple_strtoul(arg, &p, 0); |
| if (*p != '\0') { |
| /* NNN does not look like a number */ |
| reiserfs_warning(s, "super-6507", |
| "bad value %s for " |
| "-oresize\n", arg); |
| return 0; |
| } |
| } |
| } |
| |
| if (c == 'c') { |
| char *p = NULL; |
| unsigned long val = simple_strtoul(arg, &p, 0); |
| /* commit=NNN (time in seconds) */ |
| if (*p != '\0' || val >= (unsigned int)-1) { |
| reiserfs_warning(s, "super-6508", |
| "bad value %s for -ocommit\n", |
| arg); |
| return 0; |
| } |
| *commit_max_age = (unsigned int)val; |
| } |
| |
| if (c == 'w') { |
| reiserfs_warning(s, "super-6509", "nolargeio option " |
| "is no longer supported"); |
| return 0; |
| } |
| |
| if (c == 'j') { |
| if (arg && *arg && jdev_name) { |
| /* Hm, already assigned? */ |
| if (*jdev_name) { |
| reiserfs_warning(s, "super-6510", |
| "journal device was " |
| "already specified to " |
| "be %s", *jdev_name); |
| return 0; |
| } |
| *jdev_name = arg; |
| } |
| } |
| #ifdef CONFIG_QUOTA |
| if (c == 'u' || c == 'g') { |
| int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; |
| |
| if (sb_any_quota_loaded(s) && |
| (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) { |
| reiserfs_warning(s, "super-6511", |
| "cannot change journaled " |
| "quota options when quota " |
| "turned on."); |
| return 0; |
| } |
| if (*arg) { /* Some filename specified? */ |
| if (REISERFS_SB(s)->s_qf_names[qtype] |
| && strcmp(REISERFS_SB(s)->s_qf_names[qtype], |
| arg)) { |
| reiserfs_warning(s, "super-6512", |
| "%s quota file " |
| "already specified.", |
| QTYPE2NAME(qtype)); |
| return 0; |
| } |
| if (strchr(arg, '/')) { |
| reiserfs_warning(s, "super-6513", |
| "quotafile must be " |
| "on filesystem root."); |
| return 0; |
| } |
| qf_names[qtype] = kstrdup(arg, GFP_KERNEL); |
| if (!qf_names[qtype]) { |
| reiserfs_warning(s, "reiserfs-2502", |
| "not enough memory " |
| "for storing " |
| "quotafile name."); |
| return 0; |
| } |
| if (qtype == USRQUOTA) |
| *mount_options |= 1 << REISERFS_USRQUOTA; |
| else |
| *mount_options |= 1 << REISERFS_GRPQUOTA; |
| } else { |
| if (qf_names[qtype] != |
| REISERFS_SB(s)->s_qf_names[qtype]) |
| kfree(qf_names[qtype]); |
| qf_names[qtype] = NULL; |
| if (qtype == USRQUOTA) |
| *mount_options &= ~(1 << REISERFS_USRQUOTA); |
| else |
| *mount_options &= ~(1 << REISERFS_GRPQUOTA); |
| } |
| } |
| if (c == 'f') { |
| if (!strcmp(arg, "vfsold")) |
| *qfmt = QFMT_VFS_OLD; |
| else if (!strcmp(arg, "vfsv0")) |
| *qfmt = QFMT_VFS_V0; |
| else { |
| reiserfs_warning(s, "super-6514", |
| "unknown quota format " |
| "specified."); |
| return 0; |
| } |
| if (sb_any_quota_loaded(s) && |
| *qfmt != REISERFS_SB(s)->s_jquota_fmt) { |
| reiserfs_warning(s, "super-6515", |
| "cannot change journaled " |
| "quota options when quota " |
| "turned on."); |
| return 0; |
| } |
| } |
| #else |
| if (c == 'u' || c == 'g' || c == 'f') { |
| reiserfs_warning(s, "reiserfs-2503", "journaled " |
| "quota options not supported."); |
| return 0; |
| } |
| #endif |
| } |
| |
| #ifdef CONFIG_QUOTA |
| if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt |
| && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) { |
| reiserfs_warning(s, "super-6515", |
| "journaled quota format not specified."); |
| return 0; |
| } |
| if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) && |
| sb_has_quota_loaded(s, USRQUOTA)) || |
| (!(*mount_options & (1 << REISERFS_GRPQUOTA)) && |
| sb_has_quota_loaded(s, GRPQUOTA))) { |
| reiserfs_warning(s, "super-6516", "quota options must " |
| "be present when quota is turned on."); |
| return 0; |
| } |
| #endif |
| |
| return 1; |
| } |
| |
| static void switch_data_mode(struct super_block *s, unsigned long mode) |
| { |
| REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | |
| (1 << REISERFS_DATA_ORDERED) | |
| (1 << REISERFS_DATA_WRITEBACK)); |
| REISERFS_SB(s)->s_mount_opt |= (1 << mode); |
| } |
| |
| static void handle_data_mode(struct super_block *s, unsigned long mount_options) |
| { |
| if (mount_options & (1 << REISERFS_DATA_LOG)) { |
| if (!reiserfs_data_log(s)) { |
| switch_data_mode(s, REISERFS_DATA_LOG); |
| reiserfs_info(s, "switching to journaled data mode\n"); |
| } |
| } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { |
| if (!reiserfs_data_ordered(s)) { |
| switch_data_mode(s, REISERFS_DATA_ORDERED); |
| reiserfs_info(s, "switching to ordered data mode\n"); |
| } |
| } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { |
| if (!reiserfs_data_writeback(s)) { |
| switch_data_mode(s, REISERFS_DATA_WRITEBACK); |
| reiserfs_info(s, "switching to writeback data mode\n"); |
| } |
| } |
| } |
| |
| static void handle_barrier_mode(struct super_block *s, unsigned long bits) |
| { |
| int flush = (1 << REISERFS_BARRIER_FLUSH); |
| int none = (1 << REISERFS_BARRIER_NONE); |
| int all_barrier = flush | none; |
| |
| if (bits & all_barrier) { |
| REISERFS_SB(s)->s_mount_opt &= ~all_barrier; |
| if (bits & flush) { |
| REISERFS_SB(s)->s_mount_opt |= flush; |
| printk("reiserfs: enabling write barrier flush mode\n"); |
| } else if (bits & none) { |
| REISERFS_SB(s)->s_mount_opt |= none; |
| printk("reiserfs: write barriers turned off\n"); |
| } |
| } |
| } |
| |
| static void handle_attrs(struct super_block *s) |
| { |
| struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s); |
| |
| if (reiserfs_attrs(s)) { |
| if (old_format_only(s)) { |
| reiserfs_warning(s, "super-6517", "cannot support " |
| "attributes on 3.5.x disk format"); |
| REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
| return; |
| } |
| if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) { |
| reiserfs_warning(s, "super-6518", "cannot support " |
| "attributes until flag is set in " |
| "super-block"); |
| REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
| } |
| } |
| } |
| |
| #ifdef CONFIG_QUOTA |
| static void handle_quota_files(struct super_block *s, char **qf_names, |
| unsigned int *qfmt) |
| { |
| int i; |
| |
| for (i = 0; i < REISERFS_MAXQUOTAS; i++) { |
| if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) |
| kfree(REISERFS_SB(s)->s_qf_names[i]); |
| REISERFS_SB(s)->s_qf_names[i] = qf_names[i]; |
| } |
| if (*qfmt) |
| REISERFS_SB(s)->s_jquota_fmt = *qfmt; |
| } |
| #endif |
| |
| static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) |
| { |
| struct reiserfs_super_block *rs; |
| struct reiserfs_transaction_handle th; |
| unsigned long blocks; |
| unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; |
| unsigned long safe_mask = 0; |
| unsigned int commit_max_age = (unsigned int)-1; |
| struct reiserfs_journal *journal = SB_JOURNAL(s); |
| char *new_opts = kstrdup(arg, GFP_KERNEL); |
| int err; |
| char *qf_names[REISERFS_MAXQUOTAS]; |
| unsigned int qfmt = 0; |
| #ifdef CONFIG_QUOTA |
| int i; |
| #endif |
| |
| sync_filesystem(s); |
| reiserfs_write_lock(s); |
| |
| #ifdef CONFIG_QUOTA |
| memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names)); |
| #endif |
| |
| rs = SB_DISK_SUPER_BLOCK(s); |
| |
| if (!reiserfs_parse_options |
| (s, arg, &mount_options, &blocks, NULL, &commit_max_age, |
| qf_names, &qfmt)) { |
| #ifdef CONFIG_QUOTA |
| for (i = 0; i < REISERFS_MAXQUOTAS; i++) |
| if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) |
| kfree(qf_names[i]); |
| #endif |
| err = -EINVAL; |
| goto out_err_unlock; |
| } |
| #ifdef CONFIG_QUOTA |
| handle_quota_files(s, qf_names, &qfmt); |
| #endif |
| |
| handle_attrs(s); |
| |
| /* Add options that are safe here */ |
| safe_mask |= 1 << REISERFS_SMALLTAIL; |
| safe_mask |= 1 << REISERFS_LARGETAIL; |
| safe_mask |= 1 << REISERFS_NO_BORDER; |
| safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; |
| safe_mask |= 1 << REISERFS_HASHED_RELOCATION; |
| safe_mask |= 1 << REISERFS_TEST4; |
| safe_mask |= 1 << REISERFS_ATTRS; |
| safe_mask |= 1 << REISERFS_XATTRS_USER; |
| safe_mask |= 1 << REISERFS_POSIXACL; |
| safe_mask |= 1 << REISERFS_BARRIER_FLUSH; |
| safe_mask |= 1 << REISERFS_BARRIER_NONE; |
| safe_mask |= 1 << REISERFS_ERROR_RO; |
| safe_mask |= 1 << REISERFS_ERROR_CONTINUE; |
| safe_mask |= 1 << REISERFS_ERROR_PANIC; |
| safe_mask |= 1 << REISERFS_USRQUOTA; |
| safe_mask |= 1 << REISERFS_GRPQUOTA; |
| |
| /* |
| * Update the bitmask, taking care to keep |
| * the bits we're not allowed to change here |
| */ |
| REISERFS_SB(s)->s_mount_opt = |
| (REISERFS_SB(s)-> |
| s_mount_opt & ~safe_mask) | (mount_options & safe_mask); |
| |
| if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) { |
| journal->j_max_commit_age = commit_max_age; |
| journal->j_max_trans_age = commit_max_age; |
| } else if (commit_max_age == 0) { |
| /* 0 means restore defaults. */ |
| journal->j_max_commit_age = journal->j_default_max_commit_age; |
| journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; |
| } |
| |
| if (blocks) { |
| err = reiserfs_resize(s, blocks); |
| if (err != 0) |
| goto out_err_unlock; |
| } |
| |
| if (*mount_flags & MS_RDONLY) { |
| reiserfs_write_unlock(s); |
| reiserfs_xattr_init(s, *mount_flags); |
| /* remount read-only */ |
| if (s->s_flags & MS_RDONLY) |
| /* it is read-only already */ |
| goto out_ok_unlocked; |
| |
| err = dquot_suspend(s, -1); |
| if (err < 0) |
| goto out_err; |
| |
| /* try to remount file system with read-only permissions */ |
| if (sb_umount_state(rs) == REISERFS_VALID_FS |
| || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { |
| goto out_ok_unlocked; |
| } |
| |
| reiserfs_write_lock(s); |
| |
| err = journal_begin(&th, s, 10); |
| if (err) |
| goto out_err_unlock; |
| |
| /* Mounting a rw partition read-only. */ |
| reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); |
| set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state); |
| journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
| } else { |
| /* remount read-write */ |
| if (!(s->s_flags & MS_RDONLY)) { |
| reiserfs_write_unlock(s); |
| reiserfs_xattr_init(s, *mount_flags); |
| goto out_ok_unlocked; /* We are read-write already */ |
| } |
| |
| if (reiserfs_is_journal_aborted(journal)) { |
| err = journal->j_errno; |
| goto out_err_unlock; |
| } |
| |
| handle_data_mode(s, mount_options); |
| handle_barrier_mode(s, mount_options); |
| REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); |
| |
| /* now it is safe to call journal_begin */ |
| s->s_flags &= ~MS_RDONLY; |
| err = journal_begin(&th, s, 10); |
| if (err) |
| goto out_err_unlock; |
| |
| /* Mount a partition which is read-only, read-write */ |
| reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); |
| REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); |
| s->s_flags &= ~MS_RDONLY; |
| set_sb_umount_state(rs, REISERFS_ERROR_FS); |
| if (!old_format_only(s)) |
| set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); |
| /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ |
| journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
| REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS; |
| } |
| /* this will force a full flush of all journal lists */ |
| SB_JOURNAL(s)->j_must_wait = 1; |
| err = journal_end(&th); |
| if (err) |
| goto out_err_unlock; |
| |
| reiserfs_write_unlock(s); |
| if (!(*mount_flags & MS_RDONLY)) { |
| dquot_resume(s, -1); |
| reiserfs_write_lock(s); |
| finish_unfinished(s); |
| reiserfs_write_unlock(s); |
| reiserfs_xattr_init(s, *mount_flags); |
| } |
| |
| out_ok_unlocked: |
| replace_mount_options(s, new_opts); |
| return 0; |
| |
| out_err_unlock: |
| reiserfs_write_unlock(s); |
| out_err: |
| kfree(new_opts); |
| return err; |
| } |
| |
| static int read_super_block(struct super_block *s, int offset) |
| { |
| struct buffer_head *bh; |
| struct reiserfs_super_block *rs; |
| int fs_blocksize; |
| |
| bh = sb_bread(s, offset / s->s_blocksize); |
| if (!bh) { |
| reiserfs_warning(s, "sh-2006", |
| "bread failed (dev %s, block %lu, size %lu)", |
| s->s_id, offset / s->s_blocksize, |
| s->s_blocksize); |
| return 1; |
| } |
| |
| rs = (struct reiserfs_super_block *)bh->b_data; |
| if (!is_any_reiserfs_magic_string(rs)) { |
| brelse(bh); |
| return 1; |
| } |
| /* |
| * ok, reiserfs signature (old or new) found in at the given offset |
| */ |
| fs_blocksize = sb_blocksize(rs); |
| brelse(bh); |
| sb_set_blocksize(s, fs_blocksize); |
| |
| bh = sb_bread(s, offset / s->s_blocksize); |
| if (!bh) { |
| reiserfs_warning(s, "sh-2007", |
| "bread failed (dev %s, block %lu, size %lu)", |
| s->s_id, offset / s->s_blocksize, |
| s->s_blocksize); |
| return 1; |
| } |
| |
| rs = (struct reiserfs_super_block *)bh->b_data; |
| if (sb_blocksize(rs) != s->s_blocksize) { |
| reiserfs_warning(s, "sh-2011", "can't find a reiserfs " |
| "filesystem on (dev %s, block %llu, size %lu)", |
| s->s_id, |
| (unsigned long long)bh->b_blocknr, |
| s->s_blocksize); |
| brelse(bh); |
| return 1; |
| } |
| |
| if (rs->s_v1.s_root_block == cpu_to_le32(-1)) { |
| brelse(bh); |
| reiserfs_warning(s, "super-6519", "Unfinished reiserfsck " |
| "--rebuild-tree run detected. Please run\n" |
| "reiserfsck --rebuild-tree and wait for a " |
| "completion. If that fails\n" |
| "get newer reiserfsprogs package"); |
| return 1; |
| } |
| |
| SB_BUFFER_WITH_SB(s) = bh; |
| SB_DISK_SUPER_BLOCK(s) = rs; |
| |
| /* |
| * magic is of non-standard journal filesystem, look at s_version to |
| * find which format is in use |
| */ |
| if (is_reiserfs_jr(rs)) { |
| if (sb_version(rs) == REISERFS_VERSION_2) |
| reiserfs_info(s, "found reiserfs format \"3.6\"" |
| " with non-standard journal\n"); |
| else if (sb_version(rs) == REISERFS_VERSION_1) |
| reiserfs_info(s, "found reiserfs format \"3.5\"" |
| " with non-standard journal\n"); |
| else { |
| reiserfs_warning(s, "sh-2012", "found unknown " |
| "format \"%u\" of reiserfs with " |
| "non-standard magic", sb_version(rs)); |
| return 1; |
| } |
| } else |
| /* |
| * s_version of standard format may contain incorrect |
| * information, so we just look at the magic string |
| */ |
| reiserfs_info(s, |
| "found reiserfs format \"%s\" with standard journal\n", |
| is_reiserfs_3_5(rs) ? "3.5" : "3.6"); |
| |
| s->s_op = &reiserfs_sops; |
| s->s_export_op = &reiserfs_export_ops; |
| #ifdef CONFIG_QUOTA |
| s->s_qcop = &reiserfs_qctl_operations; |
| s->dq_op = &reiserfs_quota_operations; |
| s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; |
| #endif |
| |
| /* |
| * new format is limited by the 32 bit wide i_blocks field, want to |
| * be one full block below that. |
| */ |
| s->s_maxbytes = (512LL << 32) - s->s_blocksize; |
| return 0; |
| } |
| |
| /* after journal replay, reread all bitmap and super blocks */ |
| static int reread_meta_blocks(struct super_block *s) |
| { |
| ll_rw_block(READ, 1, &SB_BUFFER_WITH_SB(s)); |
| wait_on_buffer(SB_BUFFER_WITH_SB(s)); |
| if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) { |
| reiserfs_warning(s, "reiserfs-2504", "error reading the super"); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* hash detection stuff */ |
| |
| /* |
| * if root directory is empty - we set default - Yura's - hash and |
| * warn about it |
| * FIXME: we look for only one name in a directory. If tea and yura |
| * both have the same value - we ask user to send report to the |
| * mailing list |
| */ |
| static __u32 find_hash_out(struct super_block *s) |
| { |
| int retval; |
| struct inode *inode; |
| struct cpu_key key; |
| INITIALIZE_PATH(path); |
| struct reiserfs_dir_entry de; |
| struct reiserfs_de_head *deh; |
| __u32 hash = DEFAULT_HASH; |
| __u32 deh_hashval, teahash, r5hash, yurahash; |
| |
| inode = s->s_root->d_inode; |
| |
| make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3); |
| retval = search_by_entry_key(s, &key, &path, &de); |
| if (retval == IO_ERROR) { |
| pathrelse(&path); |
| return UNSET_HASH; |
| } |
| if (retval == NAME_NOT_FOUND) |
| de.de_entry_num--; |
| |
| set_de_name_and_namelen(&de); |
| deh = de.de_deh + de.de_entry_num; |
| |
| if (deh_offset(deh) == DOT_DOT_OFFSET) { |
| /* allow override in this case */ |
| if (reiserfs_rupasov_hash(s)) |
| hash = YURA_HASH; |
| reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n"); |
| goto out; |
| } |
| |
| deh_hashval = GET_HASH_VALUE(deh_offset(deh)); |
| r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen)); |
| teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen)); |
| yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen)); |
| |
| if ((teahash == r5hash && deh_hashval == r5hash) || |
| (teahash == yurahash && deh_hashval == yurahash) || |
| (r5hash == yurahash && deh_hashval == yurahash)) { |
| reiserfs_warning(s, "reiserfs-2506", |
| "Unable to automatically detect hash " |
| "function. Please mount with -o " |
| "hash={tea,rupasov,r5}"); |
| hash = UNSET_HASH; |
| goto out; |
| } |
| |
| if (deh_hashval == yurahash) |
| hash = YURA_HASH; |
| else if (deh_hashval == teahash) |
| hash = TEA_HASH; |
| else if (deh_hashval == r5hash) |
| hash = R5_HASH; |
| else { |
| reiserfs_warning(s, "reiserfs-2506", |
| "Unrecognised hash function"); |
| hash = UNSET_HASH; |
| } |
| out: |
| pathrelse(&path); |
| return hash; |
| } |
| |
| /* finds out which hash names are sorted with */ |
| static int what_hash(struct super_block *s) |
| { |
| __u32 code; |
| |
| code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); |
| |
| /* |
| * reiserfs_hash_detect() == true if any of the hash mount options |
| * were used. We must check them to make sure the user isn't |
| * using a bad hash value |
| */ |
| if (code == UNSET_HASH || reiserfs_hash_detect(s)) |
| code = find_hash_out(s); |
| |
| if (code != UNSET_HASH && reiserfs_hash_detect(s)) { |
| /* |
| * detection has found the hash, and we must check against the |
| * mount options |
| */ |
| if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { |
| reiserfs_warning(s, "reiserfs-2507", |
| "Error, %s hash detected, " |
| "unable to force rupasov hash", |
| reiserfs_hashname(code)); |
| code = UNSET_HASH; |
| } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { |
| reiserfs_warning(s, "reiserfs-2508", |
| "Error, %s hash detected, " |
| "unable to force tea hash", |
| reiserfs_hashname(code)); |
| code = UNSET_HASH; |
| } else if (reiserfs_r5_hash(s) && code != R5_HASH) { |
| reiserfs_warning(s, "reiserfs-2509", |
| "Error, %s hash detected, " |
| "unable to force r5 hash", |
| reiserfs_hashname(code)); |
| code = UNSET_HASH; |
| } |
| } else { |
| /* |
| * find_hash_out was not called or |
| * could not determine the hash |
| */ |
| if (reiserfs_rupasov_hash(s)) { |
| code = YURA_HASH; |
| } else if (reiserfs_tea_hash(s)) { |
| code = TEA_HASH; |
| } else if (reiserfs_r5_hash(s)) { |
| code = R5_HASH; |
| } |
| } |
| |
| /* |
| * if we are mounted RW, and we have a new valid hash code, update |
| * the super |
| */ |
| if (code != UNSET_HASH && |
| !(s->s_flags & MS_RDONLY) && |
| code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { |
| set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); |
| } |
| return code; |
| } |
| |
| /* return pointer to appropriate function */ |
| static hashf_t hash_function(struct super_block *s) |
| { |
| switch (what_hash(s)) { |
| case TEA_HASH: |
| reiserfs_info(s, "Using tea hash to sort names\n"); |
| return keyed_hash; |
| case YURA_HASH: |
| reiserfs_info(s, "Using rupasov hash to sort names\n"); |
| return yura_hash; |
| case R5_HASH: |
| reiserfs_info(s, "Using r5 hash to sort names\n"); |
| return r5_hash; |
| } |
| return NULL; |
| } |
| |
| /* this is used to set up correct value for old partitions */ |
| static int function2code(hashf_t func) |
| { |
| if (func == keyed_hash) |
| return TEA_HASH; |
| if (func == yura_hash) |
| return YURA_HASH; |
| if (func == r5_hash) |
| return R5_HASH; |
| |
| BUG(); /* should never happen */ |
| |
| return 0; |
| } |
| |
| #define SWARN(silent, s, id, ...) \ |
| if (!(silent)) \ |
| reiserfs_warning(s, id, __VA_ARGS__) |
| |
| static int reiserfs_fill_super(struct super_block *s, void *data, int silent) |
| { |
| struct inode *root_inode; |
| struct reiserfs_transaction_handle th; |
| int old_format = 0; |
| unsigned long blocks; |
| unsigned int commit_max_age = 0; |
| int jinit_done = 0; |
| struct reiserfs_iget_args args; |
| struct reiserfs_super_block *rs; |
| char *jdev_name; |
| struct reiserfs_sb_info *sbi; |
| int errval = -EINVAL; |
| char *qf_names[REISERFS_MAXQUOTAS] = {}; |
| unsigned int qfmt = 0; |
| |
| save_mount_options(s, data); |
| |
| sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); |
| if (!sbi) |
| return -ENOMEM; |
| s->s_fs_info = sbi; |
| /* Set default values for options: non-aggressive tails, RO on errors */ |
| sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL); |
| sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO); |
| sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH); |
| /* no preallocation minimum, be smart in reiserfs_file_write instead */ |
| sbi->s_alloc_options.preallocmin = 0; |
| /* Preallocate by 16 blocks (17-1) at once */ |
| sbi->s_alloc_options.preallocsize = 17; |
| /* setup default block allocator options */ |
| reiserfs_init_alloc_options(s); |
| |
| spin_lock_init(&sbi->old_work_lock); |
| INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits); |
| mutex_init(&sbi->lock); |
| sbi->lock_depth = -1; |
| |
| sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0, |
| s->s_id); |
| if (!sbi->commit_wq) { |
| SWARN(silent, s, "", "Cannot allocate commit workqueue"); |
| errval = -ENOMEM; |
| goto error_unlocked; |
| } |
| |
| jdev_name = NULL; |
| if (reiserfs_parse_options |
| (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name, |
| &commit_max_age, qf_names, &qfmt) == 0) { |
| goto error_unlocked; |
| } |
| if (jdev_name && jdev_name[0]) { |
| sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL); |
| if (!sbi->s_jdev) { |
| SWARN(silent, s, "", "Cannot allocate memory for " |
| "journal device name"); |
| goto error; |
| } |
| } |
| #ifdef CONFIG_QUOTA |
| handle_quota_files(s, qf_names, &qfmt); |
| #endif |
| |
| if (blocks) { |
| SWARN(silent, s, "jmacd-7", "resize option for remount only"); |
| goto error_unlocked; |
| } |
| |
| /* |
| * try old format (undistributed bitmap, super block in 8-th 1k |
| * block of a device) |
| */ |
| if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) |
| old_format = 1; |
| |
| /* |
| * try new format (64-th 1k block), which can contain reiserfs |
| * super block |
| */ |
| else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) { |
| SWARN(silent, s, "sh-2021", "can not find reiserfs on %s", |
| s->s_id); |
| goto error_unlocked; |
| } |
| |
| rs = SB_DISK_SUPER_BLOCK(s); |
| /* |
| * Let's do basic sanity check to verify that underlying device is not |
| * smaller than the filesystem. If the check fails then abort and |
| * scream, because bad stuff will happen otherwise. |
| */ |
| if (s->s_bdev && s->s_bdev->bd_inode |
| && i_size_read(s->s_bdev->bd_inode) < |
| sb_block_count(rs) * sb_blocksize(rs)) { |
| SWARN(silent, s, "", "Filesystem cannot be " |
| "mounted because it is bigger than the device"); |
| SWARN(silent, s, "", "You may need to run fsck " |
| "or increase size of your LVM partition"); |
| SWARN(silent, s, "", "Or may be you forgot to " |
| "reboot after fdisk when it told you to"); |
| goto error_unlocked; |
| } |
| |
| sbi->s_mount_state = SB_REISERFS_STATE(s); |
| sbi->s_mount_state = REISERFS_VALID_FS; |
| |
| if ((errval = reiserfs_init_bitmap_cache(s))) { |
| SWARN(silent, s, "jmacd-8", "unable to read bitmap"); |
| goto error_unlocked; |
| } |
| |
| errval = -EINVAL; |
| #ifdef CONFIG_REISERFS_CHECK |
| SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON"); |
| SWARN(silent, s, "", "- it is slow mode for debugging."); |
| #endif |
| |
| /* make data=ordered the default */ |
| if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && |
| !reiserfs_data_writeback(s)) { |
| sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); |
| } |
| |
| if (reiserfs_data_log(s)) { |
| reiserfs_info(s, "using journaled data mode\n"); |
| } else if (reiserfs_data_ordered(s)) { |
| reiserfs_info(s, "using ordered data mode\n"); |
| } else { |
| reiserfs_info(s, "using writeback data mode\n"); |
| } |
| if (reiserfs_barrier_flush(s)) { |
| printk("reiserfs: using flush barriers\n"); |
| } |
| |
| if (journal_init(s, jdev_name, old_format, commit_max_age)) { |
| SWARN(silent, s, "sh-2022", |
| "unable to initialize journal space"); |
| goto error_unlocked; |
| } else { |
| /* |
| * once this is set, journal_release must be called |
| * if we error out of the mount |
| */ |
| jinit_done = 1; |
| } |
| |
| if (reread_meta_blocks(s)) { |
| SWARN(silent, s, "jmacd-9", |
| "unable to reread meta blocks after journal init"); |
| goto error_unlocked; |
| } |
| |
| if (replay_only(s)) |
| goto error_unlocked; |
| |
| if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) { |
| SWARN(silent, s, "clm-7000", |
| "Detected readonly device, marking FS readonly"); |
| s->s_flags |= MS_RDONLY; |
| } |
| args.objectid = REISERFS_ROOT_OBJECTID; |
| args.dirid = REISERFS_ROOT_PARENT_OBJECTID; |
| root_inode = |
| iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, |
| reiserfs_init_locked_inode, (void *)&args); |
| if (!root_inode) { |
| SWARN(silent, s, "jmacd-10", "get root inode failed"); |
| goto error_unlocked; |
| } |
| |
| /* |
| * This path assumed to be called with the BKL in the old times. |
| * Now we have inherited the big reiserfs lock from it and many |
| * reiserfs helpers called in the mount path and elsewhere require |
| * this lock to be held even if it's not always necessary. Let's be |
| * conservative and hold it early. The window can be reduced after |
| * careful review of the code. |
| */ |
| reiserfs_write_lock(s); |
| |
| if (root_inode->i_state & I_NEW) { |
| reiserfs_read_locked_inode(root_inode, &args); |
| unlock_new_inode(root_inode); |
| } |
| |
| s->s_root = d_make_root(root_inode); |
| if (!s->s_root) |
| goto error; |
| /* define and initialize hash function */ |
| sbi->s_hash_function = hash_function(s); |
| if (sbi->s_hash_function == NULL) { |
| dput(s->s_root); |
| s->s_root = NULL; |
| goto error; |
| } |
| |
| if (is_reiserfs_3_5(rs) |
| || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) |
| set_bit(REISERFS_3_5, &sbi->s_properties); |
| else if (old_format) |
| set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties); |
| else |
| set_bit(REISERFS_3_6, &sbi->s_properties); |
| |
| if (!(s->s_flags & MS_RDONLY)) { |
| |
| errval = journal_begin(&th, s, 1); |
| if (errval) { |
| dput(s->s_root); |
| s->s_root = NULL; |
| goto error; |
| } |
| reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); |
| |
| set_sb_umount_state(rs, REISERFS_ERROR_FS); |
| set_sb_fs_state(rs, 0); |
| |
| /* |
| * Clear out s_bmap_nr if it would wrap. We can handle this |
| * case, but older revisions can't. This will cause the |
| * file system to fail mount on those older implementations, |
| * avoiding corruption. -jeffm |
| */ |
| if (bmap_would_wrap(reiserfs_bmap_count(s)) && |
| sb_bmap_nr(rs) != 0) { |
| reiserfs_warning(s, "super-2030", "This file system " |
| "claims to use %u bitmap blocks in " |
| "its super block, but requires %u. " |
| "Clearing to zero.", sb_bmap_nr(rs), |
| reiserfs_bmap_count(s)); |
| |
| set_sb_bmap_nr(rs, 0); |
| } |
| |
| if (old_format_only(s)) { |
| /* |
| * filesystem of format 3.5 either with standard |
| * or non-standard journal |
| */ |
| if (convert_reiserfs(s)) { |
| /* and -o conv is given */ |
| if (!silent) |
| reiserfs_info(s, |
| "converting 3.5 filesystem to the 3.6 format"); |
| |
| if (is_reiserfs_3_5(rs)) |
| /* |
| * put magic string of 3.6 format. |
| * 2.2 will not be able to |
| * mount this filesystem anymore |
| */ |
| memcpy(rs->s_v1.s_magic, |
| reiserfs_3_6_magic_string, |
| sizeof |
| (reiserfs_3_6_magic_string)); |
| |
| set_sb_version(rs, REISERFS_VERSION_2); |
| reiserfs_convert_objectid_map_v1(s); |
| set_bit(REISERFS_3_6, &sbi->s_properties); |
| clear_bit(REISERFS_3_5, &sbi->s_properties); |
| } else if (!silent) { |
| reiserfs_info(s, "using 3.5.x disk format\n"); |
| } |
| } else |
| set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); |
| |
| |
| journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
| errval = journal_end(&th); |
| if (errval) { |
| dput(s->s_root); |
| s->s_root = NULL; |
| goto error; |
| } |
| |
| reiserfs_write_unlock(s); |
| if ((errval = reiserfs_lookup_privroot(s)) || |
| (errval = reiserfs_xattr_init(s, s->s_flags))) { |
| dput(s->s_root); |
| s->s_root = NULL; |
| goto error_unlocked; |
| } |
| reiserfs_write_lock(s); |
| |
| /* |
| * look for files which were to be removed in previous session |
| */ |
| finish_unfinished(s); |
| } else { |
| if (old_format_only(s) && !silent) { |
| reiserfs_info(s, "using 3.5.x disk format\n"); |
| } |
| |
| reiserfs_write_unlock(s); |
| if ((errval = reiserfs_lookup_privroot(s)) || |
| (errval = reiserfs_xattr_init(s, s->s_flags))) { |
| dput(s->s_root); |
| s->s_root = NULL; |
| goto error_unlocked; |
| } |
| reiserfs_write_lock(s); |
| } |
| /* |
| * mark hash in super block: it could be unset. overwrite should be ok |
| */ |
| set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); |
| |
| handle_attrs(s); |
| |
| reiserfs_proc_info_init(s); |
| |
| init_waitqueue_head(&(sbi->s_wait)); |
| spin_lock_init(&sbi->bitmap_lock); |
| |
| reiserfs_write_unlock(s); |
| |
| return (0); |
| |
| error: |
| reiserfs_write_unlock(s); |
| |
| error_unlocked: |
| /* kill the commit thread, free journal ram */ |
| if (jinit_done) { |
| reiserfs_write_lock(s); |
| journal_release_error(NULL, s); |
| reiserfs_write_unlock(s); |
| } |
| |
| if (sbi->commit_wq) |
| destroy_workqueue(sbi->commit_wq); |
| |
| cancel_delayed_work_sync(&REISERFS_SB(s)->old_work); |
| |
| reiserfs_free_bitmap_cache(s); |
| if (SB_BUFFER_WITH_SB(s)) |
| brelse(SB_BUFFER_WITH_SB(s)); |
| #ifdef CONFIG_QUOTA |
| { |
| int j; |
| for (j = 0; j < REISERFS_MAXQUOTAS; j++) |
| kfree(qf_names[j]); |
| } |
| #endif |
| kfree(sbi); |
| |
| s->s_fs_info = NULL; |
| return errval; |
| } |
| |
| static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
| { |
| struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb); |
| |
| buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize)); |
| buf->f_bfree = sb_free_blocks(rs); |
| buf->f_bavail = buf->f_bfree; |
| buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; |
| buf->f_bsize = dentry->d_sb->s_blocksize; |
| /* changed to accommodate gcc folks. */ |
| buf->f_type = REISERFS_SUPER_MAGIC; |
| buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2); |
| buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2, |
| sizeof(rs->s_uuid)/2); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_QUOTA |
| static int reiserfs_write_dquot(struct dquot *dquot) |
| { |
| struct reiserfs_transaction_handle th; |
| int ret, err; |
| int depth; |
| |
| reiserfs_write_lock(dquot->dq_sb); |
| ret = |
| journal_begin(&th, dquot->dq_sb, |
| REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
| if (ret) |
| goto out; |
| depth = reiserfs_write_unlock_nested(dquot->dq_sb); |
| ret = dquot_commit(dquot); |
| reiserfs_write_lock_nested(dquot->dq_sb, depth); |
| err = journal_end(&th); |
| if (!ret && err) |
| ret = err; |
| out: |
| reiserfs_write_unlock(dquot->dq_sb); |
| return ret; |
| } |
| |
| static int reiserfs_acquire_dquot(struct dquot *dquot) |
| { |
| struct reiserfs_transaction_handle th; |
| int ret, err; |
| int depth; |
| |
| reiserfs_write_lock(dquot->dq_sb); |
| ret = |
| journal_begin(&th, dquot->dq_sb, |
| REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
| if (ret) |
| goto out; |
| depth = reiserfs_write_unlock_nested(dquot->dq_sb); |
| ret = dquot_acquire(dquot); |
| reiserfs_write_lock_nested(dquot->dq_sb, depth); |
| err = journal_end(&th); |
| if (!ret && err) |
| ret = err; |
| out: |
| reiserfs_write_unlock(dquot->dq_sb); |
| return ret; |
| } |
| |
| static int reiserfs_release_dquot(struct dquot *dquot) |
| { |
| struct reiserfs_transaction_handle th; |
| int ret, err; |
| |
| reiserfs_write_lock(dquot->dq_sb); |
| ret = |
| journal_begin(&th, dquot->dq_sb, |
| REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
| reiserfs_write_unlock(dquot->dq_sb); |
| if (ret) { |
| /* Release dquot anyway to avoid endless cycle in dqput() */ |
| dquot_release(dquot); |
| goto out; |
| } |
| ret = dquot_release(dquot); |
| reiserfs_write_lock(dquot->dq_sb); |
| err = journal_end(&th); |
| if (!ret && err) |
| ret = err; |
| reiserfs_write_unlock(dquot->dq_sb); |
| out: |
| return ret; |
| } |
| |
| static int reiserfs_mark_dquot_dirty(struct dquot *dquot) |
| { |
| /* Are we journaling quotas? */ |
| if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
| REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { |
| dquot_mark_dquot_dirty(dquot); |
| return reiserfs_write_dquot(dquot); |
| } else |
| return dquot_mark_dquot_dirty(dquot); |
| } |
| |
| static int reiserfs_write_info(struct super_block *sb, int type) |
| { |
| struct reiserfs_transaction_handle th; |
| int ret, err; |
| int depth; |
| |
| /* Data block + inode block */ |
| reiserfs_write_lock(sb); |
| ret = journal_begin(&th, sb, 2); |
| if (ret) |
| goto out; |
| depth = reiserfs_write_unlock_nested(sb); |
| ret = dquot_commit_info(sb, type); |
| reiserfs_write_lock_nested(sb, depth); |
| err = journal_end(&th); |
| if (!ret && err) |
| ret = err; |
| out: |
| reiserfs_write_unlock(sb); |
| return ret; |
| } |
| |
| /* |
| * Turn on quotas during mount time - we need to find the quota file and such... |
| */ |
| static int reiserfs_quota_on_mount(struct super_block *sb, int type) |
| { |
| return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type], |
| REISERFS_SB(sb)->s_jquota_fmt, type); |
| } |
| |
| /* |
| * Standard function to be called on quota_on |
| */ |
| static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, |
| struct path *path) |
| { |
| int err; |
| struct inode *inode; |
| struct reiserfs_transaction_handle th; |
| int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA; |
| |
| reiserfs_write_lock(sb); |
| if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) { |
| err = -EINVAL; |
| goto out; |
| } |
| |
| /* Quotafile not on the same filesystem? */ |
| if (path->dentry->d_sb != sb) { |
| err = -EXDEV; |
| goto out; |
| } |
| inode = path->dentry->d_inode; |
| /* |
| * We must not pack tails for quota files on reiserfs for quota |
| * IO to work |
| */ |
| if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) { |
| err = reiserfs_unpack(inode, NULL); |
| if (err) { |
| reiserfs_warning(sb, "super-6520", |
| "Unpacking tail of quota file failed" |
| " (%d). Cannot turn on quotas.", err); |
| err = -EINVAL; |
| goto out; |
| } |
| mark_inode_dirty(inode); |
| } |
| /* Journaling quota? */ |
| if (REISERFS_SB(sb)->s_qf_names[type]) { |
| /* Quotafile not of fs root? */ |
| if (path->dentry->d_parent != sb->s_root) |
| reiserfs_warning(sb, "super-6521", |
| "Quota file not on filesystem root. " |
| "Journalled quota will not work."); |
| } |
| |
| /* |
| * When we journal data on quota file, we have to flush journal to see |
| * all updates to the file when we bypass pagecache... |
| */ |
| if (reiserfs_file_data_log(inode)) { |
| /* Just start temporary transaction and finish it */ |
| err = journal_begin(&th, sb, 1); |
| if (err) |
| goto out; |
| err = journal_end_sync(&th); |
| if (err) |
| goto out; |
| } |
| reiserfs_write_unlock(sb); |
| return dquot_quota_on(sb, type, format_id, path); |
| out: |
| reiserfs_write_unlock(sb); |
| return err; |
| } |
| |
| /* |
| * Read data from quotafile - avoid pagecache and such because we cannot afford |
| * acquiring the locks... As quota files are never truncated and quota code |
| * itself serializes the operations (and no one else should touch the files) |
| * we don't have to be afraid of races |
| */ |
| static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, |
| size_t len, loff_t off) |
| { |
| struct inode *inode = sb_dqopt(sb)->files[type]; |
| unsigned long blk = off >> sb->s_blocksize_bits; |
| int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; |
| size_t toread; |
| struct buffer_head tmp_bh, *bh; |
| loff_t i_size = i_size_read(inode); |
| |
| if (off > i_size) |
| return 0; |
| if (off + len > i_size) |
| len = i_size - off; |
| toread = len; |
| while (toread > 0) { |
| tocopy = |
| sb->s_blocksize - offset < |
| toread ? sb->s_blocksize - offset : toread; |
| tmp_bh.b_state = 0; |
| /* |
| * Quota files are without tails so we can safely |
| * use this function |
| */ |
| reiserfs_write_lock(sb); |
| err = reiserfs_get_block(inode, blk, &tmp_bh, 0); |
| reiserfs_write_unlock(sb); |
| if (err) |
| return err; |
| if (!buffer_mapped(&tmp_bh)) /* A hole? */ |
| memset(data, 0, tocopy); |
| else { |
| bh = sb_bread(sb, tmp_bh.b_blocknr); |
| if (!bh) |
| return -EIO; |
| memcpy(data, bh->b_data + offset, tocopy); |
| brelse(bh); |
| } |
| offset = 0; |
| toread -= tocopy; |
| data += tocopy; |
| blk++; |
| } |
| return len; |
| } |
| |
| /* |
| * Write to quotafile (we know the transaction is already started and has |
| * enough credits) |
| */ |
| static ssize_t reiserfs_quota_write(struct super_block *sb, int type, |
| const char *data, size_t len, loff_t off) |
| { |
| struct inode *inode = sb_dqopt(sb)->files[type]; |
| unsigned long blk = off >> sb->s_blocksize_bits; |
| int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; |
| int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; |
| size_t towrite = len; |
| struct buffer_head tmp_bh, *bh; |
| |
| if (!current->journal_info) { |
| printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n", |
| (unsigned long long)off, (unsigned long long)len); |
| return -EIO; |
| } |
| while (towrite > 0) { |
| tocopy = sb->s_blocksize - offset < towrite ? |
| sb->s_blocksize - offset : towrite; |
| tmp_bh.b_state = 0; |
| reiserfs_write_lock(sb); |
| err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); |
| reiserfs_write_unlock(sb); |
| if (err) |
| goto out; |
| if (offset || tocopy != sb->s_blocksize) |
| bh = sb_bread(sb, tmp_bh.b_blocknr); |
| else |
| bh = sb_getblk(sb, tmp_bh.b_blocknr); |
| if (!bh) { |
| err = -EIO; |
| goto out; |
| } |
| lock_buffer(bh); |
| memcpy(bh->b_data + offset, data, tocopy); |
| flush_dcache_page(bh->b_page); |
| set_buffer_uptodate(bh); |
| unlock_buffer(bh); |
| reiserfs_write_lock(sb); |
| reiserfs_prepare_for_journal(sb, bh, 1); |
| journal_mark_dirty(current->journal_info, bh); |
| if (!journal_quota) |
| reiserfs_add_ordered_list(inode, bh); |
| reiserfs_write_unlock(sb); |
| brelse(bh); |
| offset = 0; |
| towrite -= tocopy; |
| data += tocopy; |
| blk++; |
| } |
| out: |
| if (len == towrite) |
| return err; |
| if (inode->i_size < off + len - towrite) |
| i_size_write(inode, off + len - towrite); |
| inode->i_version++; |
| inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| mark_inode_dirty(inode); |
| return len - towrite; |
| } |
| |
| #endif |
| |
| static struct dentry *get_super_block(struct file_system_type *fs_type, |
| int flags, const char *dev_name, |
| void *data) |
| { |
| return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super); |
| } |
| |
| static int __init init_reiserfs_fs(void) |
| { |
| int ret; |
| |
| ret = init_inodecache(); |
| if (ret) |
| return ret; |
| |
| reiserfs_proc_info_global_init(); |
| |
| ret = register_filesystem(&reiserfs_fs_type); |
| if (ret) |
| goto out; |
| |
| return 0; |
| out: |
| reiserfs_proc_info_global_done(); |
| destroy_inodecache(); |
| |
| return ret; |
| } |
| |
| static void __exit exit_reiserfs_fs(void) |
| { |
| reiserfs_proc_info_global_done(); |
| unregister_filesystem(&reiserfs_fs_type); |
| destroy_inodecache(); |
| } |
| |
| struct file_system_type reiserfs_fs_type = { |
| .owner = THIS_MODULE, |
| .name = "reiserfs", |
| .mount = get_super_block, |
| .kill_sb = reiserfs_kill_sb, |
| .fs_flags = FS_REQUIRES_DEV, |
| }; |
| MODULE_ALIAS_FS("reiserfs"); |
| |
| MODULE_DESCRIPTION("ReiserFS journaled filesystem"); |
| MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>"); |
| MODULE_LICENSE("GPL"); |
| |
| module_init(init_reiserfs_fs); |
| module_exit(exit_reiserfs_fs); |