summaryrefslogtreecommitdiffstats
path: root/fs/xfs/xfs_sync.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/xfs/xfs_sync.c')
-rw-r--r--fs/xfs/xfs_sync.c67
1 files changed, 8 insertions, 59 deletions
diff --git a/fs/xfs/xfs_sync.c b/fs/xfs/xfs_sync.c
index 15be21f074fd..581eb59a85b5 100644
--- a/fs/xfs/xfs_sync.c
+++ b/fs/xfs/xfs_sync.c
@@ -214,70 +214,16 @@ xfs_inode_ag_iterator(
return XFS_ERROR(last_error);
}
-STATIC int
-xfs_sync_fsdata(
- struct xfs_mount *mp)
-{
- struct xfs_buf *bp;
- int error;
-
- /*
- * If the buffer is pinned then push on the log so we won't get stuck
- * waiting in the write for someone, maybe ourselves, to flush the log.
- *
- * Even though we just pushed the log above, we did not have the
- * superblock buffer locked at that point so it can become pinned in
- * between there and here.
- */
- bp = xfs_getsb(mp, 0);
- if (xfs_buf_ispinned(bp))
- xfs_log_force(mp, 0);
- error = xfs_bwrite(bp);
- xfs_buf_relse(bp);
- return error;
-}
-
-/*
- * When remounting a filesystem read-only or freezing the filesystem, we have
- * two phases to execute. This first phase is syncing the data before we
- * quiesce the filesystem, and the second is flushing all the inodes out after
- * we've waited for all the transactions created by the first phase to
- * complete. The second phase ensures that the inodes are written to their
- * location on disk rather than just existing in transactions in the log. This
- * means after a quiesce there is no log replay required to write the inodes to
- * disk (this is the main difference between a sync and a quiesce).
- */
-/*
- * First stage of freeze - no writers will make progress now we are here,
- * so we flush delwri and delalloc buffers here, then wait for all I/O to
- * complete. Data is frozen at that point. Metadata is not frozen,
- * transactions can still occur here so don't bother emptying the AIL
- * because it'll just get dirty again.
- */
-int
-xfs_quiesce_data(
- struct xfs_mount *mp)
-{
- int error, error2 = 0;
-
- /* force out the log */
- xfs_log_force(mp, XFS_LOG_SYNC);
-
- /* write superblock and hoover up shutdown errors */
- error = xfs_sync_fsdata(mp);
-
- /* mark the log as covered if needed */
- if (xfs_log_need_covered(mp))
- error2 = xfs_fs_log_dummy(mp);
-
- return error ? error : error2;
-}
-
/*
* Second stage of a quiesce. The data is already synced, now we have to take
* care of the metadata. New transactions are already blocked, so we need to
* wait for any remaining transactions to drain out before proceeding.
*
+ * The second phase ensures that the inodes are written to their
+ * location on disk rather than just existing in transactions in the log. This
+ * means after a quiesce there is no log replay required to write the inodes to
+ * disk (this is the main difference between a sync and a quiesce).
+ *
* Note: this stops background sync work - the callers must ensure it is started
* again when appropriate.
*/
@@ -291,6 +237,9 @@ xfs_quiesce_attr(
while (atomic_read(&mp->m_active_trans) > 0)
delay(100);
+ /* force the log to unpin objects from the now complete transactions */
+ xfs_log_force(mp, XFS_LOG_SYNC);
+
/* reclaim inodes to do any IO before the freeze completes */
xfs_reclaim_inodes(mp, 0);
xfs_reclaim_inodes(mp, SYNC_WAIT);