Currently Q_XQUOTASYNC calls into the quota_sync method, but XFS does something
entirely different in it than the rest of the filesystems. xfs_quota which
calls Q_XQUOTASYNC expects an asynchronous data writeout to flush delayed
allocations, while the "VFS" quota support wants to flush changes to the quota
file.
So make Q_XQUOTASYNC call into the writeback code directly and make the
quota_sync method optional as XFS doesn't need in the sense expected by the
rest of the quota code.
GFS2 was using limited XFS-style quota and has a quota_sync method fitting
neither the style used by vfs_quota_sync nor xfs_fs_quota_sync. I left it
in for now as per discussion with Steve it expects to be called from the
sync path this way.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Index: linux-2.6/fs/quota/quota.c
===================================================================
--- linux-2.6.orig/fs/quota/quota.c 2010-02-16 00:15:27.136003612 +0100
+++ linux-2.6/fs/quota/quota.c 2010-02-16 00:16:03.263004031 +0100
@@ -18,6 +18,7 @@
#include <linux/capability.h>
#include <linux/quotaops.h>
#include <linux/types.h>
+#include <linux/writeback.h>
#include <net/netlink.h>
#include <net/genetlink.h>
@@ -52,7 +53,7 @@ void sync_quota_sb(struct super_block *s
{
int cnt;
- if (!sb->s_qcop->quota_sync)
+ if (!sb->s_qcop || !sb->s_qcop->quota_sync)
return;
sb->s_qcop->quota_sync(sb, type);
@@ -318,9 +319,11 @@ static int do_quotactl(struct super_bloc
case Q_XGETQUOTA:
return quota_getxquota(sb, type, id, addr);
case Q_XQUOTASYNC:
- if (!sb->s_qcop->quota_sync)
- return -ENOSYS;
- return sb->s_qcop->quota_sync(sb, type);
+ /* caller already holds s_umount */
+ if (sb->s_flags & MS_RDONLY)
+ return -EROFS;
+ writeback_inodes_sb(sb);
+ return 0;
default:
return -EINVAL;
}
Index: linux-2.6/fs/xfs/linux-2.6/xfs_quotaops.c
===================================================================
--- linux-2.6.orig/fs/xfs/linux-2.6/xfs_quotaops.c 2010-02-16 00:13:44.399004869 +0100
+++ linux-2.6/fs/xfs/linux-2.6/xfs_quotaops.c 2010-02-16 00:15:27.709004380 +0100
@@ -44,20 +44,6 @@ xfs_quota_type(int type)
}
STATIC int
-xfs_fs_quota_sync(
- struct super_block *sb,
- int type)
-{
- struct xfs_mount *mp = XFS_M(sb);
-
- if (sb->s_flags & MS_RDONLY)
- return -EROFS;
- if (!XFS_IS_QUOTA_RUNNING(mp))
- return -ENOSYS;
- return -xfs_sync_data(mp, 0);
-}
-
-STATIC int
xfs_fs_get_xstate(
struct super_block *sb,
struct fs_quota_stat *fqs)
@@ -151,7 +137,6 @@ xfs_fs_set_xquota(
}
const struct quotactl_ops xfs_quotactl_operations = {
- .quota_sync = xfs_fs_quota_sync,
.get_xstate = xfs_fs_get_xstate,
.set_xstate = xfs_fs_set_xstate,
.get_xquota = xfs_fs_get_xquota,
Index: linux-2.6/include/linux/quotaops.h
===================================================================
--- linux-2.6.orig/include/linux/quotaops.h 2010-02-16 00:16:06.788003612 +0100
+++ linux-2.6/include/linux/quotaops.h 2010-02-16 00:16:15.361004730 +0100
@@ -22,7 +22,7 @@ static inline struct quota_info *sb_dqop
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)
+ if (sb->s_qcop && sb->s_qcop->quota_sync)
sb->s_qcop->quota_sync(sb, type);
}
--
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