提交 f898d6c0 编写于 作者: C Christoph Hellwig 提交者: Nathan Scott

[XFS] quiesce the filesystem proper when freezing

SGI-PV: 936977
SGI-Modid: xfs-linux:xfs-kern:193840a
Signed-off-by: NChristoph Hellwig <hch@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>
上级 48fab6bf
......@@ -590,8 +590,10 @@ linvfs_sync_super(
int error;
int flags = SYNC_FSDATA;
if (wait)
flags |= SYNC_WAIT;
if (unlikely(sb->s_frozen == SB_FREEZE_WRITE))
flags = SYNC_QUIESCE;
else
flags = SYNC_FSDATA | (wait ? SYNC_WAIT : 0);
VFS_SYNC(vfsp, flags, NULL, error);
sb->s_dirt = 0;
......
......@@ -107,6 +107,7 @@ typedef enum {
#define SYNC_FSDATA 0x0020 /* flush fs data (e.g. superblocks) */
#define SYNC_REFCACHE 0x0040 /* prune some of the nfs ref cache */
#define SYNC_REMOUNT 0x0080 /* remount readonly, no dummy LRs */
#define SYNC_QUIESCE 0x0100 /* quiesce fileystem for a snapshot */
typedef int (*vfs_mount_t)(bhv_desc_t *,
struct xfs_mount_args *, struct cred *);
......
......@@ -612,29 +612,12 @@ xfs_unmount(
return XFS_ERROR(error);
}
#define REMOUNT_READONLY_FLAGS (SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT)
STATIC int
xfs_mntupdate(
bhv_desc_t *bdp,
int *flags,
struct xfs_mount_args *args)
xfs_quiesce_fs(
xfs_mount_t *mp)
{
struct vfs *vfsp = bhvtovfs(bdp);
xfs_mount_t *mp = XFS_BHVTOM(bdp);
int pincount, error;
int count = 0;
if (args->flags & XFSMNT_NOATIME)
mp->m_flags |= XFS_MOUNT_NOATIME;
else
mp->m_flags &= ~XFS_MOUNT_NOATIME;
int count = 0, pincount;
if (!(vfsp->vfs_flag & VFS_RDONLY)) {
VFS_SYNC(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL, error);
}
if (*flags & MS_RDONLY) {
xfs_refcache_purge_mp(mp);
xfs_flush_buftarg(mp->m_ddev_targp, 0);
xfs_finish_reclaim_all(mp, 0);
......@@ -647,7 +630,7 @@ xfs_mntupdate(
* we can write the unmount record.
*/
do {
VFS_SYNC(vfsp, REMOUNT_READONLY_FLAGS, NULL, error);
xfs_syncsub(mp, SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT, 0, NULL);
pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
if (!pincount) {
delay(50);
......@@ -655,6 +638,31 @@ xfs_mntupdate(
}
} while (count < 2);
return 0;
}
STATIC int
xfs_mntupdate(
bhv_desc_t *bdp,
int *flags,
struct xfs_mount_args *args)
{
struct vfs *vfsp = bhvtovfs(bdp);
xfs_mount_t *mp = XFS_BHVTOM(bdp);
int error;
if (args->flags & XFSMNT_NOATIME)
mp->m_flags |= XFS_MOUNT_NOATIME;
else
mp->m_flags &= ~XFS_MOUNT_NOATIME;
if (!(vfsp->vfs_flag & VFS_RDONLY)) {
VFS_SYNC(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL, error);
}
if (*flags & MS_RDONLY) {
xfs_quiesce_fs(mp);
/* Ok now write out an unmount record */
xfs_log_unmount_write(mp);
xfs_unmountfs_writesb(mp);
......@@ -869,10 +877,12 @@ xfs_sync(
int flags,
cred_t *credp)
{
xfs_mount_t *mp;
xfs_mount_t *mp = XFS_BHVTOM(bdp);
mp = XFS_BHVTOM(bdp);
return (xfs_syncsub(mp, flags, 0, NULL));
if (unlikely(flags == SYNC_QUIESCE))
return xfs_quiesce_fs(mp);
else
return xfs_syncsub(mp, flags, 0, NULL);
}
/*
......
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