static int leave(struct mddev *mddev) { struct md_cluster_info *cinfo = mddev->cluster_info; if (!cinfo) return 0; /* BITMAP_NEEDS_SYNC message should be sent when node * is leaving the cluster with dirty bitmap, also we * can only deliver it when dlm connection is available */ if (cinfo->slot_number > 0 && mddev->recovery_cp != MaxSector) resync_bitmap(mddev); md_unregister_thread(&cinfo->recovery_thread); md_unregister_thread(&cinfo->recv_thread); 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->resync_lockres); lockres_free(cinfo->bitmap_lockres); unlock_all_bitmaps(mddev); dlm_release_lockspace(cinfo->lockspace, 2); return 0; }
static int leave(struct mddev *mddev) { struct md_cluster_info *cinfo = mddev->cluster_info; if (!cinfo) return 0; md_unregister_thread(&cinfo->recovery_thread); md_unregister_thread(&cinfo->recv_thread); 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->sb_lock); lockres_free(cinfo->bitmap_lockres); dlm_release_lockspace(cinfo->lockspace, 2); return 0; }
static int join(struct mddev *mddev, int nodes) { struct md_cluster_info *cinfo; int ret, ops_rv; char str[64]; cinfo = kzalloc(sizeof(struct md_cluster_info), GFP_KERNEL); if (!cinfo) return -ENOMEM; INIT_LIST_HEAD(&cinfo->suspend_list); spin_lock_init(&cinfo->suspend_lock); init_completion(&cinfo->completion); set_bit(MD_CLUSTER_BEGIN_JOIN_CLUSTER, &cinfo->state); init_waitqueue_head(&cinfo->wait); mutex_init(&cinfo->recv_mutex); mddev->cluster_info = cinfo; memset(str, 0, 64); sprintf(str, "%pU", 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; } /* 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->no_new_dev_lockres = lockres_init(mddev, "no-new-dev", NULL, 0); if (!cinfo->no_new_dev_lockres) goto err; ret = dlm_lock_sync(cinfo->token_lockres, DLM_LOCK_EX); if (ret) { ret = -EAGAIN; pr_err("md-cluster: can't join cluster to avoid lock issue\n"); goto err; } cinfo->ack_lockres = lockres_init(mddev, "ack", ack_bast, 0); if (!cinfo->ack_lockres) { ret = -ENOMEM; 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); dlm_unlock_sync(cinfo->token_lockres); /* 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) { ret = -ENOMEM; goto err; } if (dlm_lock_sync(cinfo->bitmap_lockres, DLM_LOCK_PW)) { pr_err("Failed to get bitmap lock\n"); ret = -EINVAL; goto err; } cinfo->resync_lockres = lockres_init(mddev, "resync", NULL, 0); if (!cinfo->resync_lockres) { ret = -ENOMEM; goto err; } return 0; err: md_unregister_thread(&cinfo->recovery_thread); md_unregister_thread(&cinfo->recv_thread); 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->resync_lockres); lockres_free(cinfo->bitmap_lockres); if (cinfo->lockspace) dlm_release_lockspace(cinfo->lockspace, 2); mddev->cluster_info = NULL; kfree(cinfo); return ret; }