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-rw-r--r--fs/dquot.c38
1 files changed, 32 insertions, 6 deletions
diff --git a/fs/dquot.c b/fs/dquot.c
index 8922672..ae8fd9e 100644
--- a/fs/dquot.c
+++ b/fs/dquot.c
@@ -211,8 +211,6 @@ static struct hlist_head *dquot_hash;
struct dqstats dqstats;
-static void dqput(struct dquot *dquot);
-
static inline unsigned int
hashfn(const struct super_block *sb, unsigned int id, int type)
{
@@ -568,7 +566,7 @@ static struct shrinker dqcache_shrinker = {
* NOTE: If you change this function please check whether dqput_blocks() works right...
* MUST be called with either dqptr_sem or dqonoff_mutex held
*/
-static void dqput(struct dquot *dquot)
+void dqput(struct dquot *dquot)
{
int ret;
@@ -662,10 +660,28 @@ static struct dquot *get_empty_dquot(struct super_block *sb, int type)
}
/*
+ * Check whether dquot is in memory.
+ * MUST be called with either dqptr_sem or dqonoff_mutex held
+ */
+int dquot_is_cached(struct super_block *sb, unsigned int id, int type)
+{
+ unsigned int hashent = hashfn(sb, id, type);
+ int ret = 0;
+
+ if (!sb_has_quota_active(sb, type))
+ return 0;
+ spin_lock(&dq_list_lock);
+ if (find_dquot(hashent, sb, id, type) != NODQUOT)
+ ret = 1;
+ spin_unlock(&dq_list_lock);
+ return ret;
+}
+
+/*
* Get reference to dquot
* MUST be called with either dqptr_sem or dqonoff_mutex held
*/
-static struct dquot *dqget(struct super_block *sb, unsigned int id, int type)
+struct dquot *dqget(struct super_block *sb, unsigned int id, int type)
{
unsigned int hashent = hashfn(sb, id, type);
struct dquot *dquot, *empty = NODQUOT;
@@ -1184,17 +1200,23 @@ out_err:
* Release all quotas referenced by inode
* Transaction must be started at an entry
*/
-int dquot_drop(struct inode *inode)
+int dquot_drop_locked(struct inode *inode)
{
int cnt;
- down_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
if (inode->i_dquot[cnt] != NODQUOT) {
dqput(inode->i_dquot[cnt]);
inode->i_dquot[cnt] = NODQUOT;
}
}
+ return 0;
+}
+
+int dquot_drop(struct inode *inode)
+{
+ down_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
+ dquot_drop_locked(inode);
up_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
return 0;
}
@@ -2308,7 +2330,11 @@ EXPORT_SYMBOL(dquot_release);
EXPORT_SYMBOL(dquot_mark_dquot_dirty);
EXPORT_SYMBOL(dquot_initialize);
EXPORT_SYMBOL(dquot_drop);
+EXPORT_SYMBOL(dquot_drop_locked);
EXPORT_SYMBOL(vfs_dq_drop);
+EXPORT_SYMBOL(dqget);
+EXPORT_SYMBOL(dqput);
+EXPORT_SYMBOL(dquot_is_cached);
EXPORT_SYMBOL(dquot_alloc_space);
EXPORT_SYMBOL(dquot_alloc_inode);
EXPORT_SYMBOL(dquot_free_space);
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