pkt_sched: Fix ingress deletion and filter attachment.

Based upon bug reports by Stephen Hemminger.

We still had some cases using ->qdisc instead of ->qdisc_sleeping.

Also, qdisc_lookup() should return ingress qdiscs.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index ba1d121f312769c856821741901db6c45b276284..bbf149dd7818b192c0aad9b8693a3790e115a26e 100644 (file)
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -183,6 +183,21 @@ EXPORT_SYMBOL(unregister_qdisc);
    (root qdisc, all its children, children of children etc.)
  */
 
+struct Qdisc *qdisc_match_from_root(struct Qdisc *root, u32 handle)
+{
+       struct Qdisc *q;
+
+       if (!(root->flags & TCQ_F_BUILTIN) &&
+           root->handle == handle)
+               return root;
+
+       list_for_each_entry(q, &root->list, list) {
+               if (q->handle == handle)
+                       return q;
+       }
+       return NULL;
+}
+
 struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle)
 {
        unsigned int i;
@@ -191,16 +206,11 @@ struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle)
                struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
                struct Qdisc *q, *txq_root = txq->qdisc_sleeping;
 
-               if (!(txq_root->flags & TCQ_F_BUILTIN) &&
-                   txq_root->handle == handle)
-                       return txq_root;
-
-               list_for_each_entry(q, &txq_root->list, list) {
-                       if (q->handle == handle)
-                               return q;
-               }
+               q = qdisc_match_from_root(txq_root, handle);
+               if (q)
+                       return q;
        }
-       return NULL;
+       return qdisc_match_from_root(dev->rx_queue.qdisc_sleeping, handle);
 }
 
 static struct Qdisc *qdisc_leaf(struct Qdisc *p, u32 classid)
@@ -908,7 +918,7 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
                                        return -ENOENT;
                                q = qdisc_leaf(p, clid);
                        } else { /* ingress */
-                               q = dev->rx_queue.qdisc;
+                               q = dev->rx_queue.qdisc_sleeping;
                        }
                } else {
                        struct netdev_queue *dev_queue;
@@ -978,7 +988,7 @@ replay:
                                        return -ENOENT;
                                q = qdisc_leaf(p, clid);
                        } else { /*ingress */
-                               q = dev->rx_queue.qdisc;
+                               q = dev->rx_queue.qdisc_sleeping;
                        }
                } else {
                        struct netdev_queue *dev_queue;
@@ -1529,11 +1539,11 @@ static int tc_dump_tclass(struct sk_buff *skb, struct netlink_callback *cb)
        t = 0;
 
        dev_queue = netdev_get_tx_queue(dev, 0);
-       if (tc_dump_tclass_root(dev_queue->qdisc, skb, tcm, cb, &t, s_t) < 0)
+       if (tc_dump_tclass_root(dev_queue->qdisc_sleeping, skb, tcm, cb, &t, s_t) < 0)
                goto done;
 
        dev_queue = &dev->rx_queue;
-       if (tc_dump_tclass_root(dev_queue->qdisc, skb, tcm, cb, &t, s_t) < 0)
+       if (tc_dump_tclass_root(dev_queue->qdisc_sleeping, skb, tcm, cb, &t, s_t) < 0)
                goto done;
 
 done: