mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
2660 lines
70 KiB
2660 lines
70 KiB
/* |
|
* 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/backing-dev.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; |
|
|
|
/* |
|
* We need s_umount for protecting quota writeback. We have to use |
|
* trylock as reiserfs_cancel_old_flush() may be waiting for this work |
|
* to complete with s_umount held. |
|
*/ |
|
if (!down_read_trylock(&s->s_umount)) { |
|
/* Requeue work if we are not cancelling it */ |
|
spin_lock(&sbi->old_work_lock); |
|
if (sbi->work_queued == 1) |
|
queue_delayed_work(system_long_wq, &sbi->old_work, HZ); |
|
spin_unlock(&sbi->old_work_lock); |
|
return; |
|
} |
|
spin_lock(&sbi->old_work_lock); |
|
/* Avoid clobbering the cancel state... */ |
|
if (sbi->work_queued == 1) |
|
sbi->work_queued = 0; |
|
spin_unlock(&sbi->old_work_lock); |
|
|
|
reiserfs_sync_fs(s, 1); |
|
up_read(&s->s_umount); |
|
} |
|
|
|
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 (sb_rdonly(s) || !(s->s_flags & SB_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); |
|
} |
|
|
|
void reiserfs_cancel_old_flush(struct super_block *s) |
|
{ |
|
struct reiserfs_sb_info *sbi = REISERFS_SB(s); |
|
|
|
spin_lock(&sbi->old_work_lock); |
|
/* Make sure no new flushes will be queued */ |
|
sbi->work_queued = 2; |
|
spin_unlock(&sbi->old_work_lock); |
|
cancel_delayed_work_sync(&REISERFS_SB(s)->old_work); |
|
} |
|
|
|
static int reiserfs_freeze(struct super_block *s) |
|
{ |
|
struct reiserfs_transaction_handle th; |
|
|
|
reiserfs_cancel_old_flush(s); |
|
|
|
reiserfs_write_lock(s); |
|
if (!sb_rdonly(s)) { |
|
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) |
|
{ |
|
struct reiserfs_sb_info *sbi = REISERFS_SB(s); |
|
|
|
reiserfs_allow_writes(s); |
|
spin_lock(&sbi->old_work_lock); |
|
/* Allow old_work to run again */ |
|
sbi->work_queued = 0; |
|
spin_unlock(&sbi->old_work_lock); |
|
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 |
|
* |
|
* Called with superblock write locked. If quotas are enabled, we have to |
|
* release/retake lest we call dquot_quota_on_mount(), proceed to |
|
* schedule_on_each_cpu() in invalidate_bdev() and deadlock waiting for the per |
|
* cpu worklets to complete flush_async_commits() that in turn wait for the |
|
* superblock write lock. |
|
*/ |
|
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 & SB_ACTIVE) { |
|
ms_active_set = 0; |
|
} else { |
|
ms_active_set = 1; |
|
s->s_flags |= SB_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; |
|
} |
|
reiserfs_write_unlock(s); |
|
ret = reiserfs_quota_on_mount(s, i); |
|
reiserfs_write_lock(s); |
|
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 (IS_ERR_OR_NULL(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 &= ~SB_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); |
|
} |
|
|
|
#ifdef CONFIG_QUOTA |
|
static int reiserfs_quota_off(struct super_block *sb, int type); |
|
|
|
static void reiserfs_quota_off_umount(struct super_block *s) |
|
{ |
|
int type; |
|
|
|
for (type = 0; type < REISERFS_MAXQUOTAS; type++) |
|
reiserfs_quota_off(s, type); |
|
} |
|
#else |
|
static inline void reiserfs_quota_off_umount(struct super_block *s) |
|
{ |
|
} |
|
#endif |
|
|
|
static void reiserfs_put_super(struct super_block *s) |
|
{ |
|
struct reiserfs_transaction_handle th; |
|
th.t_trans_id = 0; |
|
|
|
reiserfs_quota_off_umount(s); |
|
|
|
reiserfs_write_lock(s); |
|
|
|
/* |
|
* change file system state to current state if it was mounted |
|
* with read-write permissions |
|
*/ |
|
if (!sb_rdonly(s)) { |
|
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(REISERFS_SB(s)->s_jdev); |
|
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 = 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_free_inode(struct inode *inode) |
|
{ |
|
kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); |
|
} |
|
|
|
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| |
|
SLAB_ACCOUNT), |
|
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 (sb_rdonly(inode->i_sb)) { |
|
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_show_option(seq, "jdev", 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_show_option(seq, "usrjquota", |
|
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_show_option(seq, "grpjquota", |
|
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, |
|
.free_inode = reiserfs_free_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, const 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, |
|
.get_next_id = dquot_get_next_id, |
|
}; |
|
|
|
static const struct quotactl_ops reiserfs_qctl_operations = { |
|
.quota_on = reiserfs_quota_on, |
|
.quota_off = reiserfs_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 = |
|
i_size_read(s->s_bdev->bd_inode) >> 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 (qf_names[qtype] != |
|
REISERFS_SB(s)->s_qf_names[qtype]) |
|
kfree(qf_names[qtype]); |
|
qf_names[qtype] = NULL; |
|
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 (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; |
|
int err; |
|
char *qf_names[REISERFS_MAXQUOTAS]; |
|
unsigned int qfmt = 0; |
|
#ifdef CONFIG_QUOTA |
|
int i; |
|
#endif |
|
|
|
new_opts = kstrdup(arg, GFP_KERNEL); |
|
if (arg && !new_opts) |
|
return -ENOMEM; |
|
|
|
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 & SB_RDONLY) { |
|
reiserfs_write_unlock(s); |
|
reiserfs_xattr_init(s, *mount_flags); |
|
/* remount read-only */ |
|
if (sb_rdonly(s)) |
|
/* 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 (!sb_rdonly(s)) { |
|
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 &= ~SB_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 &= ~SB_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 & SB_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: |
|
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(REQ_OP_READ, 0, 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 = d_inode(s->s_root); |
|
|
|
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 && |
|
!sb_rdonly(s) && |
|
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; |
|
|
|
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_unlocked; |
|
} |
|
} |
|
#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; |
|
} |
|
|
|
s->s_time_min = 0; |
|
s->s_time_max = U32_MAX; |
|
|
|
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; |
|
|
|
s->s_xattr = reiserfs_xattr_handlers; |
|
|
|
if (bdev_read_only(s->s_bdev) && !sb_rdonly(s)) { |
|
SWARN(silent, s, "clm-7000", |
|
"Detected readonly device, marking FS readonly"); |
|
s->s_flags |= SB_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); |
|
} |
|
|
|
if (!S_ISDIR(root_inode->i_mode) || !inode_get_bytes(root_inode) || |
|
!root_inode->i_size) { |
|
SWARN(silent, s, "", "corrupt root inode, run fsck"); |
|
iput(root_inode); |
|
errval = -EUCLEAN; |
|
goto error; |
|
} |
|
|
|
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 (!sb_rdonly(s)) { |
|
|
|
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); |
|
|
|
reiserfs_cancel_old_flush(s); |
|
|
|
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_jdev); |
|
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, |
|
const 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 = d_inode(path->dentry); |
|
/* |
|
* 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); |
|
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); |
|
err = dquot_quota_on(sb, type, format_id, path); |
|
if (!err) { |
|
inode_lock(inode); |
|
REISERFS_I(inode)->i_attrs |= REISERFS_IMMUTABLE_FL | |
|
REISERFS_NOATIME_FL; |
|
inode_set_flags(inode, S_IMMUTABLE | S_NOATIME, |
|
S_IMMUTABLE | S_NOATIME); |
|
inode_unlock(inode); |
|
mark_inode_dirty(inode); |
|
} |
|
return err; |
|
out: |
|
reiserfs_write_unlock(sb); |
|
return err; |
|
} |
|
|
|
static int reiserfs_quota_off(struct super_block *sb, int type) |
|
{ |
|
int err; |
|
struct inode *inode = sb_dqopt(sb)->files[type]; |
|
|
|
if (!inode || !igrab(inode)) |
|
goto out; |
|
|
|
err = dquot_quota_off(sb, type); |
|
if (err) |
|
goto out_put; |
|
|
|
inode_lock(inode); |
|
REISERFS_I(inode)->i_attrs &= ~(REISERFS_IMMUTABLE_FL | |
|
REISERFS_NOATIME_FL); |
|
inode_set_flags(inode, 0, S_IMMUTABLE | S_NOATIME); |
|
inode_unlock(inode); |
|
mark_inode_dirty(inode); |
|
out_put: |
|
iput(inode); |
|
return err; |
|
out: |
|
return dquot_quota_off(sb, type); |
|
} |
|
|
|
/* |
|
* 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_mtime = inode->i_ctime = current_time(inode); |
|
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 <[email protected]>"); |
|
MODULE_LICENSE("GPL"); |
|
|
|
module_init(init_reiserfs_fs); |
|
module_exit(exit_reiserfs_fs);
|
|
|