pkt_sched: give visibility to mq slave qdiscs

Commit 6da7c8fcbcbd ("qdisc: allow setting default queuing discipline")
added the ability to change default qdisc from pfifo_fast to say fq

But as most modern ethernet devices are multiqueue, we cant really
see all the statistics from "tc -s qdisc show", as the default root
qdisc is mq.

This patch adds the calls to qdisc_list_add() to mq and mqprio

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h
index 59ec3cd15d681c04230b3cccd386c045140c0645..891d80d2c4d2a98cfdad75deee1c28bdce9c9f9f 100644 (file)
--- a/include/net/pkt_sched.h
+++ b/include/net/pkt_sched.h
@@ -88,6 +88,7 @@ int unregister_qdisc(struct Qdisc_ops *qops);
 void qdisc_get_default(char *id, size_t len);
 int qdisc_set_default(const char *id);
 
+void qdisc_list_add(struct Qdisc *q);
 void qdisc_list_del(struct Qdisc *q);
 struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle);
 struct Qdisc *qdisc_lookup_class(struct net_device *dev, u32 handle);

diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index cd81505662b8a3bcc201a18bce0d6c9bd421b650..547b4a88ae2aa5fa9c850973cb6db9ad26e1035c 100644 (file)
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -271,11 +271,12 @@ static struct Qdisc *qdisc_match_from_root(struct Qdisc *root, u32 handle)
        return NULL;
 }
 
-static void qdisc_list_add(struct Qdisc *q)
+void qdisc_list_add(struct Qdisc *q)
 {
        if ((q->parent != TC_H_ROOT) && !(q->flags & TCQ_F_INGRESS))
                list_add_tail(&q->list, &qdisc_dev(q)->qdisc->list);
 }
+EXPORT_SYMBOL(qdisc_list_add);
 
 void qdisc_list_del(struct Qdisc *q)
 {

diff --git a/net/sched/sch_mq.c b/net/sched/sch_mq.c
index 2e56185736d67d589b78918ff59fd7641eb2377a..a8b2864a696be934114a3b23ccf75e0cb8c4d1d6 100644 (file)
--- a/net/sched/sch_mq.c
+++ b/net/sched/sch_mq.c
@@ -78,14 +78,19 @@ static void mq_attach(struct Qdisc *sch)
 {
        struct net_device *dev = qdisc_dev(sch);
        struct mq_sched *priv = qdisc_priv(sch);
-       struct Qdisc *qdisc;
+       struct Qdisc *qdisc, *old;
        unsigned int ntx;
 
        for (ntx = 0; ntx < dev->num_tx_queues; ntx++) {
                qdisc = priv->qdiscs[ntx];
-               qdisc = dev_graft_qdisc(qdisc->dev_queue, qdisc);
-               if (qdisc)
-                       qdisc_destroy(qdisc);
+               old = dev_graft_qdisc(qdisc->dev_queue, qdisc);
+               if (old)
+                       qdisc_destroy(old);
+#ifdef CONFIG_NET_SCHED
+               if (ntx < dev->real_num_tx_queues)
+                       qdisc_list_add(qdisc);
+#endif
+
        }
        kfree(priv->qdiscs);
        priv->qdiscs = NULL;

diff --git a/net/sched/sch_mqprio.c b/net/sched/sch_mqprio.c
index d44c868cb537d0e1da33e9d6806c00966e7286fc..6749e2f540d0336eb69f61cb82b59623382e5777 100644 (file)
--- a/net/sched/sch_mqprio.c
+++ b/net/sched/sch_mqprio.c
@@ -167,15 +167,17 @@ static void mqprio_attach(struct Qdisc *sch)
 {
        struct net_device *dev = qdisc_dev(sch);
        struct mqprio_sched *priv = qdisc_priv(sch);
-       struct Qdisc *qdisc;
+       struct Qdisc *qdisc, *old;
        unsigned int ntx;
 
        /* Attach underlying qdisc */
        for (ntx = 0; ntx < dev->num_tx_queues; ntx++) {
                qdisc = priv->qdiscs[ntx];
-               qdisc = dev_graft_qdisc(qdisc->dev_queue, qdisc);
-               if (qdisc)
-                       qdisc_destroy(qdisc);
+               old = dev_graft_qdisc(qdisc->dev_queue, qdisc);
+               if (old)
+                       qdisc_destroy(old);
+               if (ntx < dev->real_num_tx_queues)
+                       qdisc_list_add(qdisc);
        }
        kfree(priv->qdiscs);
        priv->qdiscs = NULL;