From: Jakub Radtke <jakub.radtke@xxxxxxxxx>
The patch enables the implementation of a write-intent bitmap for external
metadata.
Configuration of the internal bitmaps for non-native metadata requires the
extension in superswitch to perform an additional sysfs setup before the
array is activated.
Change-Id: I77be689b9f4f815dd00bb14ef52267686b273fb5
Signed-off-by: Jakub Radtke <jakub.radtke@xxxxxxxxx>
---
Assemble.c | 6 ++++++
Create.c | 10 ++++++++++
mdadm.h | 3 +++
3 files changed, 19 insertions(+)
diff --git a/Assemble.c b/Assemble.c
index ed0ddfb1..479ff5ec 100644
--- a/Assemble.c
+++ b/Assemble.c
@@ -2094,6 +2094,12 @@ int assemble_container_content(struct supertype *st, int mdfd,
}
}
+ /* Before activating the array, perform extra steps required to configure the internal
+ * write-intent bitmap.
+ */
+ if (content->consistency_policy == CONSISTENCY_POLICY_BITMAP &&
+ st->ss->set_bitmap)
+ st->ss->set_bitmap(st, content);
if (start_reshape) {
int spare = content->array.raid_disks + expansion;
diff --git a/Create.c b/Create.c
index 51f8826b..751f18c1 100644
--- a/Create.c
+++ b/Create.c
@@ -989,6 +989,16 @@ int Create(struct supertype *st, char *mddev,
st->ss->free_super(st);
goto abort_locked;
}
+ /* Before activating the array, perform extra steps required
+ * to configure the internal write-intent bitmap.
+ */
+ if (info_new.consistency_policy ==
+ CONSISTENCY_POLICY_BITMAP &&
+ st->ss->set_bitmap &&
+ st->ss->set_bitmap(st, &info)) {
+ st->ss->free_super(st);
+ goto abort_locked;
+ }
/* update parent container uuid */
if (me) {
diff --git a/mdadm.h b/mdadm.h
index 1ee6c92e..0cf94239 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -1006,6 +1006,9 @@ extern struct superswitch {
int (*add_internal_bitmap)(struct supertype *st, int *chunkp,
int delay, int write_behind,
unsigned long long size, int may_change, int major);
+ /* Perform additional setup required to activate a bitmap.
+ */
+ int (*set_bitmap)(struct supertype *st, struct mdinfo *info);
/* Seek 'fd' to start of write-intent-bitmap. Must be an
* md-native format bitmap
*/
--
2.26.2
