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>
Signed-off-by: Adam Kwolek <adam.kwolek@xxxxxxxxx>
---
mdadm.h | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/mdadm.h b/mdadm.h
index 95f355e..726e0a4 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -726,6 +726,15 @@ extern struct superswitch {
enum state_of_reshape request_type,
struct metadata_update **updates);
+ /* 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 */
--
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