xfs: create rmap update intent log items

Create rmap update intent/done log items to record redo information in
the log.  Because we need to roll transactions between updating the
bmbt mapping and updating the reverse mapping, we also have to track
the status of the metadata updates that will be recorded in the
post-roll transactions, just in case we crash before committing the
final transaction.  This mechanism enables log recovery to finish what
was already started.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 449cadf149f9..654a0924b3d3 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -46,6 +46,7 @@
 #include "xfs_quota.h"
 #include "xfs_sysfs.h"
 #include "xfs_ondisk.h"
+#include "xfs_rmap_item.h"
 
 #include <linux/namei.h>
 #include <linux/init.h>
@@ -1765,8 +1766,26 @@ xfs_init_zones(void)
 	if (!xfs_icreate_zone)
 		goto out_destroy_ili_zone;
 
+	xfs_rud_zone = kmem_zone_init((sizeof(struct xfs_rud_log_item) +
+			((XFS_RUD_MAX_FAST_EXTENTS - 1) *
+				 sizeof(struct xfs_map_extent))),
+			"xfs_rud_item");
+	if (!xfs_rud_zone)
+		goto out_destroy_icreate_zone;
+
+	xfs_rui_zone = kmem_zone_init((sizeof(struct xfs_rui_log_item) +
+			((XFS_RUI_MAX_FAST_EXTENTS - 1) *
+				sizeof(struct xfs_map_extent))),
+			"xfs_rui_item");
+	if (!xfs_rui_zone)
+		goto out_destroy_rud_zone;
+
 	return 0;
 
+ out_destroy_rud_zone:
+	kmem_zone_destroy(xfs_rud_zone);
+ out_destroy_icreate_zone:
+	kmem_zone_destroy(xfs_icreate_zone);
  out_destroy_ili_zone:
 	kmem_zone_destroy(xfs_ili_zone);
  out_destroy_inode_zone:
@@ -1805,6 +1824,8 @@ xfs_destroy_zones(void)
 	 * destroy caches.
 	 */
 	rcu_barrier();
+	kmem_zone_destroy(xfs_rui_zone);
+	kmem_zone_destroy(xfs_rud_zone);
 	kmem_zone_destroy(xfs_icreate_zone);
 	kmem_zone_destroy(xfs_ili_zone);
 	kmem_zone_destroy(xfs_inode_zone);