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Diffstat (limited to 'net/sched/sch_tbf.c')
-rw-r--r--net/sched/sch_tbf.c47
1 files changed, 45 insertions, 2 deletions
diff --git a/net/sched/sch_tbf.c b/net/sched/sch_tbf.c
index e478d316602..1aaf1b6e51a 100644
--- a/net/sched/sch_tbf.c
+++ b/net/sched/sch_tbf.c
@@ -116,14 +116,57 @@ struct tbf_sched_data {
struct qdisc_watchdog watchdog; /* Watchdog timer */
};
+
+/* GSO packet is too big, segment it so that tbf can transmit
+ * each segment in time
+ */
+static int tbf_segment(struct sk_buff *skb, struct Qdisc *sch)
+{
+ struct tbf_sched_data *q = qdisc_priv(sch);
+ struct sk_buff *segs, *nskb;
+ netdev_features_t features = netif_skb_features(skb);
+ int ret, nb;
+
+ segs = skb_gso_segment(skb, features & ~NETIF_F_GSO_MASK);
+
+ if (IS_ERR_OR_NULL(segs))
+ return qdisc_reshape_fail(skb, sch);
+
+ nb = 0;
+ while (segs) {
+ nskb = segs->next;
+ segs->next = NULL;
+ if (likely(segs->len <= q->max_size)) {
+ qdisc_skb_cb(segs)->pkt_len = segs->len;
+ ret = qdisc_enqueue(segs, q->qdisc);
+ } else {
+ ret = qdisc_reshape_fail(skb, sch);
+ }
+ if (ret != NET_XMIT_SUCCESS) {
+ if (net_xmit_drop_count(ret))
+ sch->qstats.drops++;
+ } else {
+ nb++;
+ }
+ segs = nskb;
+ }
+ sch->q.qlen += nb;
+ if (nb > 1)
+ qdisc_tree_decrease_qlen(sch, 1 - nb);
+ consume_skb(skb);
+ return nb > 0 ? NET_XMIT_SUCCESS : NET_XMIT_DROP;
+}
+
static int tbf_enqueue(struct sk_buff *skb, struct Qdisc *sch)
{
struct tbf_sched_data *q = qdisc_priv(sch);
int ret;
- if (qdisc_pkt_len(skb) > q->max_size)
+ if (qdisc_pkt_len(skb) > q->max_size) {
+ if (skb_is_gso(skb))
+ return tbf_segment(skb, sch);
return qdisc_reshape_fail(skb, sch);
-
+ }
ret = qdisc_enqueue(skb, q->qdisc);
if (ret != NET_XMIT_SUCCESS) {
if (net_xmit_drop_count(ret))