Function clusterDelSlot

app/redis-6.2.6/src/cluster.c:3896–3903

Delete the specified slot marking it as unassigned. * Returns C_OK if the slot was assigned, otherwise if the slot was * already unassigned C_ERR is returned. */

 * Returns C_OK if the slot was assigned, otherwise if the slot was
 * already unassigned C_ERR is returned. */
int clusterDelSlot(int slot) {
    clusterNode *n = server.cluster->slots[slot];

    if (!n) return C_ERR;
    serverAssert(clusterNodeClearSlotBit(n,slot) == 1);
    server.cluster->slots[slot] = NULL;
    return C_OK;
}

/* Delete all the slots associated with the specified node.
 * The number of deleted slots is returned. */