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quota: cleanup dquota sync functions (version 4)

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Currently the VFS calls vfs_dq_sync to sync out disk quotas for a given
superblock.  This is a small wrapper around sync_dquots which for the
case of a non-NULL superblock is a small wrapper around quota_sync_sb.

Just make quota_sync_sb global (rename it to sync_quota_sb) and call it
directly.  Also call it directly for those cases in quota.c that have a
superblock and leave sync_dquots purely an iterator over sync_quota_sb and
remove it's superblock argument.

To make this nicer move the check for the lack of a quota_sync method
from the callers into sync_quota_sb.

[folded build fix from Alexander Beregalov <a.beregalov@gmail.com>]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2009-04-27 16:43:54 +02:00 committed by Al Viro
parent 60b0680fa2
commit 850b201b08
3 changed files with 18 additions and 20 deletions
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25
fs/quota/quota.c
View file

@ -159,10 +159,14 @@ static int check_quotactl_valid(struct super_block *sb, int type, int cmd,
return error;
}
static void quota_sync_sb(struct super_block *sb, int type)
#ifdef CONFIG_QUOTA
void sync_quota_sb(struct super_block *sb, int type)
{
int cnt;
if (!sb->s_qcop->quota_sync)
return;
sb->s_qcop->quota_sync(sb, type);
if (sb_dqopt(sb)->flags & DQUOT_QUOTA_SYS_FILE)
@ -191,17 +195,13 @@ static void quota_sync_sb(struct super_block *sb, int type)
}
mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
}
#endif
void sync_dquots(struct super_block *sb, int type)
static void sync_dquots(int type)
{
struct super_block *sb;
int cnt;
if (sb) {
if (sb->s_qcop->quota_sync)
quota_sync_sb(sb, type);
return;
}
spin_lock(&sb_lock);
restart:
list_for_each_entry(sb, &super_blocks, s_list) {
@ -222,8 +222,8 @@ restart:
sb->s_count++;
spin_unlock(&sb_lock);
down_read(&sb->s_umount);
if (sb->s_root && sb->s_qcop->quota_sync)
quota_sync_sb(sb, type);
if (sb->s_root)
sync_quota_sb(sb, type);
up_read(&sb->s_umount);
spin_lock(&sb_lock);
if (__put_super_and_need_restart(sb))
@ -301,7 +301,10 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id,
return sb->s_qcop->set_dqblk(sb, type, id, &idq);
}
case Q_SYNC:
sync_dquots(sb, type);
if (sb)
sync_quota_sb(sb, type);
else
sync_dquots(type);
return 0;
case Q_XQUOTAON:

2
fs/sync.c
View file

@ -27,7 +27,7 @@
*/
static int __sync_filesystem(struct super_block *sb, int wait)
{
vfs_dq_sync(sb);
sync_quota_sb(sb, -1);
sync_inodes_sb(sb, wait);
lock_super(sb);
if (sb->s_dirt && sb->s_op->write_super)

11
include/linux/quotaops.h
View file

@ -20,7 +20,7 @@ static inline struct quota_info *sb_dqopt(struct super_block *sb)
/*
* declaration of quota_function calls in kernel.
*/
void sync_dquots(struct super_block *sb, int type);
void sync_quota_sb(struct super_block *sb, int type);
int dquot_initialize(struct inode *inode, int type);
int dquot_drop(struct inode *inode);
@ -253,12 +253,7 @@ static inline void vfs_dq_free_inode(struct inode *inode)
inode->i_sb->dq_op->free_inode(inode, 1);
}
/* The following two functions cannot be called inside a transaction */
static inline void vfs_dq_sync(struct super_block *sb)
{
sync_dquots(sb, -1);
}
/* Cannot be called inside a transaction */
static inline int vfs_dq_off(struct super_block *sb, int remount)
{
int ret = -ENOSYS;
@ -334,7 +329,7 @@ static inline void vfs_dq_free_inode(struct inode *inode)
{
}
static inline void vfs_dq_sync(struct super_block *sb)
static inline void sync_quota_sb(struct super_block *sb, int type)
{
}