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-rw-r--r--fs/quota/dquot.c32
1 files changed, 15 insertions, 17 deletions
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index d69a1d1..10cbe84 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -116,15 +116,15 @@
* spinlock to internal buffers before writing.
*
* Lock ordering (including related VFS locks) is the following:
- * i_mutex > dqonoff_sem > journal_lock > dqptr_sem > dquot->dq_lock >
+ * dqonoff_mutex > i_mutex > journal_lock > dqptr_sem > dquot->dq_lock >
* dqio_mutex
+ * dqonoff_mutex > i_mutex comes from dquot_quota_sync, dquot_enable, etc.
* The lock ordering of dqptr_sem imposed by quota code is only dqonoff_sem >
* dqptr_sem. But filesystem has to count with the fact that functions such as
* dquot_alloc_space() acquire dqptr_sem and they usually have to be called
* from inside a transaction to keep filesystem consistency after a crash. Also
* filesystems usually want to do some IO on dquot from ->mark_dirty which is
* called with dqptr_sem held.
- * i_mutex on quota files is special (it's below dqio_mutex)
*/
static __cacheline_aligned_in_smp DEFINE_SPINLOCK(dq_list_lock);
@@ -638,7 +638,7 @@ int dquot_quota_sync(struct super_block *sb, int type, int wait)
dqstats_inc(DQST_SYNCS);
mutex_unlock(&dqopt->dqonoff_mutex);
- if (!wait || (sb_dqopt(sb)->flags & DQUOT_QUOTA_SYS_FILE))
+ if (!wait || (dqopt->flags & DQUOT_QUOTA_SYS_FILE))
return 0;
/* This is not very clever (and fast) but currently I don't know about
@@ -652,18 +652,17 @@ int dquot_quota_sync(struct super_block *sb, int type, int wait)
* Now when everything is written we can discard the pagecache so
* that userspace sees the changes.
*/
- mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
+ mutex_lock(&dqopt->dqonoff_mutex);
for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
if (type != -1 && cnt != type)
continue;
if (!sb_has_quota_active(sb, cnt))
continue;
- mutex_lock_nested(&sb_dqopt(sb)->files[cnt]->i_mutex,
- I_MUTEX_QUOTA);
- truncate_inode_pages(&sb_dqopt(sb)->files[cnt]->i_data, 0);
- mutex_unlock(&sb_dqopt(sb)->files[cnt]->i_mutex);
+ mutex_lock(&dqopt->files[cnt]->i_mutex);
+ truncate_inode_pages(&dqopt->files[cnt]->i_data, 0);
+ mutex_unlock(&dqopt->files[cnt]->i_mutex);
}
- mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
+ mutex_unlock(&dqopt->dqonoff_mutex);
return 0;
}
@@ -907,14 +906,14 @@ static void add_dquot_ref(struct super_block *sb, int type)
spin_unlock(&inode->i_lock);
continue;
}
-#ifdef CONFIG_QUOTA_DEBUG
- if (unlikely(inode_get_rsv_space(inode) > 0))
- reserved = 1;
-#endif
__iget(inode);
spin_unlock(&inode->i_lock);
spin_unlock(&inode_sb_list_lock);
+#ifdef CONFIG_QUOTA_DEBUG
+ if (unlikely(inode_get_rsv_space(inode) > 0))
+ reserved = 1;
+#endif
iput(old_inode);
__dquot_initialize(inode, type);
@@ -2037,8 +2036,7 @@ int dquot_disable(struct super_block *sb, int type, unsigned int flags)
/* If quota was reenabled in the meantime, we have
* nothing to do */
if (!sb_has_quota_loaded(sb, cnt)) {
- mutex_lock_nested(&toputinode[cnt]->i_mutex,
- I_MUTEX_QUOTA);
+ mutex_lock(&toputinode[cnt]->i_mutex);
toputinode[cnt]->i_flags &= ~(S_IMMUTABLE |
S_NOATIME | S_NOQUOTA);
truncate_inode_pages(&toputinode[cnt]->i_data,
@@ -2133,7 +2131,7 @@ static int vfs_load_quota_inode(struct inode *inode, int type, int format_id,
/* We don't want quota and atime on quota files (deadlocks
* possible) Also nobody should write to the file - we use
* special IO operations which ignore the immutable bit. */
- mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
+ mutex_lock(&inode->i_mutex);
oldflags = inode->i_flags & (S_NOATIME | S_IMMUTABLE |
S_NOQUOTA);
inode->i_flags |= S_NOQUOTA | S_NOATIME | S_IMMUTABLE;
@@ -2180,7 +2178,7 @@ out_file_init:
iput(inode);
out_lock:
if (oldflags != -1) {
- mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
+ mutex_lock(&inode->i_mutex);
/* Set the flags back (in the case of accidental quotaon()
* on a wrong file we don't want to mess up the flags) */
inode->i_flags &= ~(S_NOATIME | S_NOQUOTA | S_IMMUTABLE);
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