- unsigned int hash;
- sfq_index x;
- int ret;
-
- hash = sfq_classify(skb, sch, &ret);
- if (hash == 0) {
- if (ret == NET_XMIT_BYPASS)
- sch->qstats.drops++;
- kfree_skb(skb);
- return ret;
- }
- hash--;
-
- x = q->ht[hash];
- if (x == SFQ_DEPTH) {
- q->ht[hash] = x = q->dep[SFQ_DEPTH].next;
- q->hash[x] = hash;
- }
-
- sch->qstats.backlog += skb->len;
- __skb_queue_head(&q->qs[x], skb);
- /* If selected queue has length q->limit+1, this means that
- * all another queues are empty and we do simple tail drop.
- * This packet is still requeued at head of queue, tail packet
- * is dropped.
- */
- if (q->qs[x].qlen > q->limit) {
- skb = q->qs[x].prev;
- __skb_unlink(skb, &q->qs[x]);
- sch->qstats.drops++;
- sch->qstats.backlog -= skb->len;
- kfree_skb(skb);
- return NET_XMIT_CN;
- }
-
- sfq_inc(q, x);
- if (q->qs[x].qlen == 1) { /* The flow is new */
- if (q->tail == SFQ_DEPTH) { /* It is the first flow */
- q->tail = x;
- q->next[x] = x;
- q->allot[x] = q->quantum;
- } else {
- q->next[x] = q->next[q->tail];
- q->next[q->tail] = x;
- q->tail = x;
- }
- }