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quota: Introduce writeout_quota_sb() (version 4)

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Introduce this function which just writes all the quota structures but
avoids all the syncing and cache pruning work to expose quota structures
to userspace. Use this function from __sync_filesystem when wait == 0.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Jan Kara 2009-04-27 16:43:55 +02:00 committed by Al Viro
parent 850b201b08
commit c3f8a40c1c
2 changed files with 14 additions and 1 deletions
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6
fs/sync.c
View file

@ -27,7 +27,11 @@
*/
static int __sync_filesystem(struct super_block *sb, int wait)
{
sync_quota_sb(sb, -1);
/* Avoid doing twice syncing and cache pruning for quota sync */
if (!wait)
writeout_quota_sb(sb, -1);
else
sync_quota_sb(sb, -1);
sync_inodes_sb(sb, wait);
lock_super(sb);
if (sb->s_dirt && sb->s_op->write_super)

9
include/linux/quotaops.h
View file

@ -21,6 +21,11 @@ static inline struct quota_info *sb_dqopt(struct super_block *sb)
* declaration of quota_function calls in kernel.
*/
void sync_quota_sb(struct super_block *sb, int type);
static inline void writeout_quota_sb(struct super_block *sb, int type)
{
if (sb->s_qcop->quota_sync)
sb->s_qcop->quota_sync(sb, type);
}
int dquot_initialize(struct inode *inode, int type);
int dquot_drop(struct inode *inode);
@ -333,6 +338,10 @@ static inline void sync_quota_sb(struct super_block *sb, int type)
{
}
static inline void writeout_quota_sb(struct super_block *sb, int type)
{
}
static inline int vfs_dq_off(struct super_block *sb, int remount)
{
return 0;