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xfs: create rmap update intent log items

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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>
This commit is contained in:
Darrick J. Wong
2016-08-03 12:04:45 +10:00
committed by Dave Chinner
parent abf0923381
commit 5880f2d78f
6 changed files with 662 additions and 2 deletions
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21
fs/xfs/xfs_super.c
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@@ -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);