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md-cluster: add CHANGE_CAPACITY message type

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The msg type CHANGE_CAPACITY is introduced to support
resize clustered raid in later patch, and it is sent
after all the nodes have the same sync_size, receiver
node just need to set new capacity once received this
msg.

Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
This commit is contained in:
Guoqing Jiang 2017-03-01 16:42:38 +08:00 committed by Shaohua Li
parent 0ba959774e
commit 7da3d20333
1 changed files with 5 additions and 0 deletions
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5
drivers/md/md-cluster.c
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@ -104,6 +104,7 @@ enum msg_type {
REMOVE,
RE_ADD,
BITMAP_NEEDS_SYNC,
CHANGE_CAPACITY,
};
struct cluster_msg {
@ -579,6 +580,10 @@ static int process_recvd_msg(struct mddev *mddev, struct cluster_msg *msg)
case METADATA_UPDATED:
process_metadata_update(mddev, msg);
break;
case CHANGE_CAPACITY:
set_capacity(mddev->gendisk, mddev->array_sectors);
revalidate_disk(mddev->gendisk);
break;
case RESYNCING:
process_suspend_info(mddev, le32_to_cpu(msg->slot),
le64_to_cpu(msg->low),