Exemple #1
0
static void load_bitmaps(struct mddev *mddev, int total_slots)
{
	struct md_cluster_info *cinfo = mddev->cluster_info;

	/* load all the node's bitmap info for resync */
	if (gather_all_resync_info(mddev, total_slots))
		pr_err("md-cluster: failed to gather all resyn infos\n");
	set_bit(MD_CLUSTER_ALREADY_IN_CLUSTER, &cinfo->state);
	/* wake up recv thread in case something need to be handled */
	if (test_and_clear_bit(MD_CLUSTER_PENDING_RECV_EVENT, &cinfo->state))
		md_wakeup_thread(cinfo->recv_thread);
}
Exemple #2
0
static int join(struct mddev *mddev, int nodes)
{
	struct md_cluster_info *cinfo;
	int ret, ops_rv;
	char str[64];

	if (!try_module_get(THIS_MODULE))
		return -ENOENT;

	cinfo = kzalloc(sizeof(struct md_cluster_info), GFP_KERNEL);
	if (!cinfo)
		return -ENOMEM;

	init_completion(&cinfo->completion);

	mutex_init(&cinfo->sb_mutex);
	mddev->cluster_info = cinfo;

	memset(str, 0, 64);
	pretty_uuid(str, mddev->uuid);
	ret = dlm_new_lockspace(str, mddev->bitmap_info.cluster_name,
				DLM_LSFL_FS, LVB_SIZE,
				&md_ls_ops, mddev, &ops_rv, &cinfo->lockspace);
	if (ret)
		goto err;
	wait_for_completion(&cinfo->completion);
	if (nodes < cinfo->slot_number) {
		pr_err("md-cluster: Slot allotted(%d) is greater than available slots(%d).",
			cinfo->slot_number, nodes);
		ret = -ERANGE;
		goto err;
	}
	cinfo->sb_lock = lockres_init(mddev, "cmd-super",
					NULL, 0);
	if (!cinfo->sb_lock) {
		ret = -ENOMEM;
		goto err;
	}
	/* Initiate the communication resources */
	ret = -ENOMEM;
	cinfo->recv_thread = md_register_thread(recv_daemon, mddev, "cluster_recv");
	if (!cinfo->recv_thread) {
		pr_err("md-cluster: cannot allocate memory for recv_thread!\n");
		goto err;
	}
	cinfo->message_lockres = lockres_init(mddev, "message", NULL, 1);
	if (!cinfo->message_lockres)
		goto err;
	cinfo->token_lockres = lockres_init(mddev, "token", NULL, 0);
	if (!cinfo->token_lockres)
		goto err;
	cinfo->ack_lockres = lockres_init(mddev, "ack", ack_bast, 0);
	if (!cinfo->ack_lockres)
		goto err;
	cinfo->no_new_dev_lockres = lockres_init(mddev, "no-new-dev", NULL, 0);
	if (!cinfo->no_new_dev_lockres)
		goto err;

	/* get sync CR lock on ACK. */
	if (dlm_lock_sync(cinfo->ack_lockres, DLM_LOCK_CR))
		pr_err("md-cluster: failed to get a sync CR lock on ACK!(%d)\n",
				ret);
	/* get sync CR lock on no-new-dev. */
	if (dlm_lock_sync(cinfo->no_new_dev_lockres, DLM_LOCK_CR))
		pr_err("md-cluster: failed to get a sync CR lock on no-new-dev!(%d)\n", ret);


	pr_info("md-cluster: Joined cluster %s slot %d\n", str, cinfo->slot_number);
	snprintf(str, 64, "bitmap%04d", cinfo->slot_number - 1);
	cinfo->bitmap_lockres = lockres_init(mddev, str, NULL, 1);
	if (!cinfo->bitmap_lockres)
		goto err;
	if (dlm_lock_sync(cinfo->bitmap_lockres, DLM_LOCK_PW)) {
		pr_err("Failed to get bitmap lock\n");
		ret = -EINVAL;
		goto err;
	}

	INIT_LIST_HEAD(&cinfo->suspend_list);
	spin_lock_init(&cinfo->suspend_lock);

	ret = gather_all_resync_info(mddev, nodes);
	if (ret)
		goto err;

	return 0;
err:
	lockres_free(cinfo->message_lockres);
	lockres_free(cinfo->token_lockres);
	lockres_free(cinfo->ack_lockres);
	lockres_free(cinfo->no_new_dev_lockres);
	lockres_free(cinfo->bitmap_lockres);
	lockres_free(cinfo->sb_lock);
	if (cinfo->lockspace)
		dlm_release_lockspace(cinfo->lockspace, 2);
	mddev->cluster_info = NULL;
	kfree(cinfo);
	module_put(THIS_MODULE);
	return ret;
}