[XFS] write barrier support Issue all log sync operations as ordered
writes. In addition flush the disk cache on fsync if the sync cached
operation didn't sync the log to disk (this requires some additional
bookeping in the transaction and log code). If the device doesn't claim to
support barriers, the filesystem has an extern log volume or the trial
superblock write with barriers enabled failed we disable barriers and
print a warning. We should probably fail the mount completely, but that
could lead to nasty boot failures for the root filesystem. Not enabled by
default yet, needs more destructive testing first.
SGI-PV: 912426
SGI-Modid: xfs-linux:xfs-kern:198723a
Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index a263aec..0cc7af5 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -1025,7 +1025,12 @@
struct xfs_efd_log_item *,
xfs_fsblock_t,
xfs_extlen_t);
-int xfs_trans_commit(xfs_trans_t *, uint flags, xfs_lsn_t *);
+int _xfs_trans_commit(xfs_trans_t *,
+ uint flags,
+ xfs_lsn_t *,
+ int *);
+#define xfs_trans_commit(tp, flags, lsn) \
+ _xfs_trans_commit(tp, flags, lsn, NULL)
void xfs_trans_cancel(xfs_trans_t *, int);
void xfs_trans_ail_init(struct xfs_mount *);
xfs_lsn_t xfs_trans_push_ail(struct xfs_mount *, xfs_lsn_t);