Commit 1fa9a1ad authored by Guoqing Jiang's avatar Guoqing Jiang Committed by Shaohua Li
Browse files

md-cluster: check the return value of process_recvd_msg 



We don't need to run the full path of recv_daemon
if process_recvd_msg doesn't return 0.

Reviewed-by: default avatarNeilBrown <neilb@suse.com>
Signed-off-by: default avatarGuoqing Jiang <gqjiang@suse.com>
Signed-off-by: default avatarShaohua Li <shli@fb.com>
parent 51e453ae

drivers/md/md-cluster.c

+10 −3
Original line number Diff line number Diff line
@@ -520,11 +520,13 @@ static void process_readd_disk(struct mddev *mddev, struct cluster_msg *msg) 
			__func__, __LINE__, le32_to_cpu(msg->raid_slot));

}



static void process_recvd_msg(struct mddev *mddev, struct cluster_msg *msg)

static int process_recvd_msg(struct mddev *mddev, struct cluster_msg *msg)

{

	int ret = 0;



	if (WARN(mddev->cluster_info->slot_number - 1 == le32_to_cpu(msg->slot),

		"node %d received it's own msg\n", le32_to_cpu(msg->slot)))

		return;

		return -1;

	switch (le32_to_cpu(msg->type)) {

	case METADATA_UPDATED:

		process_metadata_update(mddev, msg);
@@ -547,9 +549,11 @@ static void process_recvd_msg(struct mddev *mddev, struct cluster_msg *msg) 
		__recover_slot(mddev, le32_to_cpu(msg->slot));

		break;

	default:

		ret = -1;

		pr_warn("%s:%d Received unknown message from %d\n",

			__func__, __LINE__, msg->slot);

	}

	return ret;

}



/*
@@ -573,7 +577,9 @@ static void recv_daemon(struct md_thread *thread) 


	/* read lvb and wake up thread to process this message_lockres */

	memcpy(&msg, message_lockres->lksb.sb_lvbptr, sizeof(struct cluster_msg));

	process_recvd_msg(thread->mddev, &msg);

	ret = process_recvd_msg(thread->mddev, &msg);

	if (ret)

		goto out;



	/*release CR on ack_lockres*/

	ret = dlm_unlock_sync(ack_lockres);
@@ -587,6 +593,7 @@ static void recv_daemon(struct md_thread *thread) 
	ret = dlm_lock_sync(ack_lockres, DLM_LOCK_CR);

	if (unlikely(ret != 0))

		pr_info("lock CR on ack failed return %d\n", ret);

out:

	/*release CR on message_lockres*/

	ret = dlm_unlock_sync(message_lockres);

	if (unlikely(ret != 0))