Function clusterNodeAddFailureReport

app/redis-6.2.6/src/cluster.c:824–847

This function is called every time we get a failure report from a node. * The side effect is to populate the fail_reports list (or to update * the timestamp of an existing report). * * 'failing' is the node that is in failure state according to the * 'sender' node. * * The function returns 0 if it just updates a timestamp of an existing * failure report from the same sender. 1 is returned

 * failure report from the same sender. 1 is returned if a new failure
 * report is created. */
int clusterNodeAddFailureReport(clusterNode *failing, clusterNode *sender) {
    list *l = failing->fail_reports;
    listNode *ln;
    listIter li;
    clusterNodeFailReport *fr;

    /* If a failure report from the same sender already exists, just update
     * the timestamp. */
    listRewind(l,&li);
    while ((ln = listNext(&li)) != NULL) {
        fr = ln->value;
        if (fr->node == sender) {
            fr->time = mstime();
            return 0;
        }
    }

    /* Otherwise create a new report. */
    fr = zmalloc(sizeof(*fr));
    fr->node = sender;
    fr->time = mstime();
    listAddNodeTail(l,fr);
    return 1;
}

/* Remove failure reports that are too old, where too old means reasonably
 * older than the global node timeout. Note that anyway for a node to be