From: Maciej Trela <maciej.trela@xxxxxxxxx>
Add new methods to the superswitch for external metadata supporting
its own critical reshape data backup mechanism.
The new methods are:
save_backup - save critical data to backup area
discard_backup - critical data was successfully migrated, so
the current backup may be discarded
recover_backup - recover critical data after reshape crashed
during array assembly
Signed-off-by: Maciej Trela <maciej.trela@xxxxxxxxx>
---
mdadm.h | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/mdadm.h b/mdadm.h
index e5e56fe..baee86c 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -671,6 +671,15 @@ extern struct superswitch {
int (*grow_array)(struct active_array *a, int new_raid_disks);
+ /* for external backup area
+ *
+ */
+ int (*save_backup)(struct supertype *st, struct mdinfo *info,
+ void *buf, unsigned long write_offset, int length);
+ void (*discard_backup)(struct supertype *st, struct mdinfo *info);
+ int (*recover_backup)(struct supertype *st, struct mdinfo *info,
+ void *ptr, int length);
+
int swapuuid; /* true if uuid is bigending rather than hostendian */
int external;
const char *name; /* canonical metadata name */
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
