set resync_start in Incremental_container

From: Dan Williams <dan.j.williams@intel.com>

Metadata handlers set mdinfo.resync_start depending on the state of the
array.  By default mdadm assumes the array is dirty and needs a full
resync.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

3 files changed, 7 insertions, 0 deletions

diff --git a/mdadm.h b/mdadm.h
index 27f0f38..176d1c3 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -147,6 +147,7 @@ struct mdinfo {
 						 */
 	int			reshape_active;
 	unsigned long long	reshape_progress;
+	unsigned long long	resync_start;
 	int			new_level, delta_disks, new_layout, new_chunk;
 	int			errors;
 	int			cache_size; /* size of raid456 stripe cache*/
diff --git a/super-intel.c b/super-intel.c
index cfbf772..3c15ed2 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -1053,6 +1053,11 @@ static struct mdinfo *container_content_imsm(struct supertype *st)
 		this->array.chunk_size = __le16_to_cpu(map->blocks_per_strip) << 9;
 		this->array.state = !vol->dirty;
 		this->container_member = i;
+		if (map->map_state == IMSM_T_STATE_UNINITIALIZED || dev->vol.dirty)
+			this->resync_start = 0;
+		else
+			this->resync_start = ~0ULL;
+
 		strncpy(this->name, (char *) dev->volume, MAX_RAID_SERIAL_LEN);
 		this->name[MAX_RAID_SERIAL_LEN] = 0;
 
diff --git a/sysfs.c b/sysfs.c
index 8b5a6ff..f0e9512 100644
--- a/sysfs.c
+++ b/sysfs.c
@@ -325,6 +325,7 @@ int sysfs_set_array(struct mdinfo *sra,
 	rv |= sysfs_set_num(sra, NULL, "chunk_size", info->array.chunk_size);
 	rv |= sysfs_set_num(sra, NULL, "layout", info->array.layout);
 	rv |= sysfs_set_num(sra, NULL, "component_size", info->component_size);
+	rv |= sysfs_set_num(sra, NULL, "resync_start", info->resync_start);
 	sra->array = info->array;
 	return rv;
 }