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quota: Split dquot_quota_sync() to writeback and cache flushing part

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Split off part of dquot_quota_sync() which writes dquots into a quota file
to a separate function. In the next patch we will use the function from
filesystems and we do not want to abuse ->quota_sync quotactl callback more
than necessary.

Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Reviewed-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:
Jan Kara 2012-07-03 16:45:28 +02:00 committed by Al Viro
parent 6eedc70150
commit ceed17236a
9 changed files with 37 additions and 13 deletions
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4
fs/gfs2/quota.c
View file

@ -1108,7 +1108,7 @@ void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
}
}
int gfs2_quota_sync(struct super_block *sb, int type, int wait)
int gfs2_quota_sync(struct super_block *sb, int type)
{
struct gfs2_sbd *sdp = sb->s_fs_info;
struct gfs2_quota_data **qda;
@ -1154,7 +1154,7 @@ int gfs2_quota_sync(struct super_block *sb, int type, int wait)
static int gfs2_quota_sync_timeo(struct super_block *sb, int type)
{
return gfs2_quota_sync(sb, type, 0);
return gfs2_quota_sync(sb, type);
}
int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id)

2
fs/gfs2/quota.h
View file

@ -26,7 +26,7 @@ extern int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid);
extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
u32 uid, u32 gid);
extern int gfs2_quota_sync(struct super_block *sb, int type, int wait);
extern int gfs2_quota_sync(struct super_block *sb, int type);
extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id);
extern int gfs2_quota_init(struct gfs2_sbd *sdp);

2
fs/gfs2/super.c
View file

@ -838,7 +838,7 @@ static int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
int error;
flush_workqueue(gfs2_delete_workqueue);
gfs2_quota_sync(sdp->sd_vfs, 0, 1);
gfs2_quota_sync(sdp->sd_vfs, 0);
gfs2_statfs_sync(sdp->sd_vfs, 0);
error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE,

2
fs/gfs2/sys.c
View file

@ -168,7 +168,7 @@ static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
if (simple_strtol(buf, NULL, 0) != 1)
return -EINVAL;
gfs2_quota_sync(sdp->sd_vfs, 0, 1);
gfs2_quota_sync(sdp->sd_vfs, 0);
return len;
}

24
fs/quota/dquot.c
View file

@ -595,12 +595,14 @@ int dquot_scan_active(struct super_block *sb,
}
EXPORT_SYMBOL(dquot_scan_active);
int dquot_quota_sync(struct super_block *sb, int type, int wait)
/* Write all dquot structures to quota files */
int dquot_writeback_dquots(struct super_block *sb, int type)
{
struct list_head *dirty;
struct dquot *dquot;
struct quota_info *dqopt = sb_dqopt(sb);
int cnt;
int err, ret = 0;
mutex_lock(&dqopt->dqonoff_mutex);
for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
@ -624,7 +626,9 @@ int dquot_quota_sync(struct super_block *sb, int type, int wait)
atomic_inc(&dquot->dq_count);
spin_unlock(&dq_list_lock);
dqstats_inc(DQST_LOOKUPS);
sb->dq_op->write_dquot(dquot);
err = sb->dq_op->write_dquot(dquot);
if (!ret && err)
err = ret;
dqput(dquot);
spin_lock(&dq_list_lock);
}
@ -638,7 +642,21 @@ int dquot_quota_sync(struct super_block *sb, int type, int wait)
dqstats_inc(DQST_SYNCS);
mutex_unlock(&dqopt->dqonoff_mutex);
if (!wait || (dqopt->flags & DQUOT_QUOTA_SYS_FILE))
return ret;
}
EXPORT_SYMBOL(dquot_writeback_dquots);
/* Write all dquot structures to disk and make them visible from userspace */
int dquot_quota_sync(struct super_block *sb, int type)
{
struct quota_info *dqopt = sb_dqopt(sb);
int cnt;
int ret;
ret = dquot_writeback_dquots(sb, type);
if (ret)
return ret;
if (dqopt->flags & DQUOT_QUOTA_SYS_FILE)
return 0;
/* This is not very clever (and fast) but currently I don't know about

4
fs/quota/quota.c
View file

@ -47,7 +47,7 @@ static int check_quotactl_permission(struct super_block *sb, int type, int cmd,
static void quota_sync_one(struct super_block *sb, void *arg)
{
if (sb->s_qcop && sb->s_qcop->quota_sync)
sb->s_qcop->quota_sync(sb, *(int *)arg, 1);
sb->s_qcop->quota_sync(sb, *(int *)arg);
}
static int quota_sync_all(int type)
@ -270,7 +270,7 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id,
case Q_SYNC:
if (!sb->s_qcop->quota_sync)
return -ENOSYS;
return sb->s_qcop->quota_sync(sb, type, 1);
return sb->s_qcop->quota_sync(sb, type);
case Q_XQUOTAON:
case Q_XQUOTAOFF:
case Q_XQUOTARM:

2
fs/sync.c
View file

@ -30,7 +30,7 @@
static int __sync_filesystem(struct super_block *sb, int wait)
{
if (sb->s_qcop && sb->s_qcop->quota_sync)
sb->s_qcop->quota_sync(sb, -1, wait);
sb->s_qcop->quota_sync(sb, -1);
if (wait)
sync_inodes_sb(sb);

2
include/linux/quota.h
View file

@ -333,7 +333,7 @@ struct quotactl_ops {
int (*quota_on)(struct super_block *, int, int, struct path *);
int (*quota_on_meta)(struct super_block *, int, int);
int (*quota_off)(struct super_block *, int);
int (*quota_sync)(struct super_block *, int, int);
int (*quota_sync)(struct super_block *, int);
int (*get_info)(struct super_block *, int, struct if_dqinfo *);
int (*set_info)(struct super_block *, int, struct if_dqinfo *);
int (*get_dqblk)(struct super_block *, int, qid_t, struct fs_disk_quota *);

8
include/linux/quotaops.h
View file

@ -83,7 +83,8 @@ int dquot_quota_on(struct super_block *sb, int type, int format_id,
int dquot_quota_on_mount(struct super_block *sb, char *qf_name,
int format_id, int type);
int dquot_quota_off(struct super_block *sb, int type);
int dquot_quota_sync(struct super_block *sb, int type, int wait);
int dquot_writeback_dquots(struct super_block *sb, int type);
int dquot_quota_sync(struct super_block *sb, int type);
int dquot_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
int dquot_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
int dquot_get_dqblk(struct super_block *sb, int type, qid_t id,
@ -255,6 +256,11 @@ static inline int dquot_resume(struct super_block *sb, int type)
#define dquot_file_open generic_file_open
static inline int dquot_writeback_dquots(struct super_block *sb, int type)
{
return 0;
}
#endif /* CONFIG_QUOTA */
static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)