Function clusterManagerGetLinkStatus

app/redis-6.2.6/src/redis-cli.c:4521–4554

Check for disconnected cluster links. It returns a dict whose keys * are the unreachable node addresses and the values are lists of * node addresses that cannot reach the unreachable node. */

 * are the unreachable node addresses and the values are lists of
 * node addresses that cannot reach the unreachable node. */
static dict *clusterManagerGetLinkStatus(void) {
    if (cluster_manager.nodes == NULL) return NULL;
    dict *status = dictCreate(&clusterManagerLinkDictType, NULL);
    listIter li;
    listNode *ln;
    listRewind(cluster_manager.nodes, &li);
    while ((ln = listNext(&li)) != NULL) {
        clusterManagerNode *node = ln->value;
        list *links = clusterManagerGetDisconnectedLinks(node);
        if (links) {
            listIter lli;
            listNode *lln;
            listRewind(links, &lli);
            while ((lln = listNext(&lli)) != NULL) {
                clusterManagerLink *link = lln->value;
                list *from = NULL;
                dictEntry *entry = dictFind(status, link->node_addr);
                if (entry) from = dictGetVal(entry);
                else {
                    from = listCreate();
                    dictAdd(status, sdsdup(link->node_addr), from);
                }
                sds myaddr = sdsempty();
                myaddr = sdscatfmt(myaddr, "%s:%u", node->ip, node->port);
                listAddNodeTail(from, myaddr);
                sdsfree(link->node_name);
                sdsfree(link->node_addr);
                zfree(link);
            }
            listRelease(links);
        }
    }
    return status;
}

/* Add the error string to cluster_manager.errors and print it. */
static void clusterManagerOnError(sds err) {