diff options
| author | Jarek Poplawski <jarkao2@gmail.com> | 2009-09-15 02:53:07 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-09-15 02:53:07 -0700 |
| commit | 926e61b7c44db83013159ac2f74bccd451607b5a (patch) | |
| tree | 512b532e22d4374948e0d149902304edfbef7e25 /net/sched | |
| parent | ca519274d537706b6fb1e3e91238d34a23320584 (diff) | |
| download | lwn-926e61b7c44db83013159ac2f74bccd451607b5a.tar.gz lwn-926e61b7c44db83013159ac2f74bccd451607b5a.zip | |
pkt_sched: Fix tx queue selection in tc_modify_qdisc
After the recent mq change there is the new select_queue qdisc class
method used in tc_modify_qdisc, but it works OK only for direct child
qdiscs of mq qdisc. Grandchildren always get the first tx queue, which
would give wrong qdisc_root etc. results (e.g. for sch_htb as child of
sch_prio). This patch fixes it by using parent's dev_queue for such
grandchildren qdiscs. The select_queue method's return type is changed
BTW.
With feedback from: Patrick McHardy <kaber@trash.net>
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
| -rw-r--r-- | net/sched/sch_api.c | 10 | ||||
| -rw-r--r-- | net/sched/sch_mq.c | 13 |
2 files changed, 16 insertions, 7 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index c6e4063f698c..1367aa21fad5 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -1116,12 +1116,16 @@ create_n_graft: tcm->tcm_parent, tcm->tcm_parent, tca, &err); else { - unsigned int ntx = 0; + struct netdev_queue *dev_queue; if (p && p->ops->cl_ops && p->ops->cl_ops->select_queue) - ntx = p->ops->cl_ops->select_queue(p, tcm); + dev_queue = p->ops->cl_ops->select_queue(p, tcm); + else if (p) + dev_queue = p->dev_queue; + else + dev_queue = netdev_get_tx_queue(dev, 0); - q = qdisc_create(dev, netdev_get_tx_queue(dev, ntx), p, + q = qdisc_create(dev, dev_queue, p, tcm->tcm_parent, tcm->tcm_handle, tca, &err); } diff --git a/net/sched/sch_mq.c b/net/sched/sch_mq.c index dd5ee022f1f7..600c50143cc7 100644 --- a/net/sched/sch_mq.c +++ b/net/sched/sch_mq.c @@ -125,13 +125,18 @@ static struct netdev_queue *mq_queue_get(struct Qdisc *sch, unsigned long cl) return netdev_get_tx_queue(dev, ntx); } -static unsigned int mq_select_queue(struct Qdisc *sch, struct tcmsg *tcm) +static struct netdev_queue *mq_select_queue(struct Qdisc *sch, + struct tcmsg *tcm) { unsigned int ntx = TC_H_MIN(tcm->tcm_parent); + struct netdev_queue *dev_queue = mq_queue_get(sch, ntx); - if (!mq_queue_get(sch, ntx)) - return 0; - return ntx - 1; + if (!dev_queue) { + struct net_device *dev = qdisc_dev(sch); + + return netdev_get_tx_queue(dev, 0); + } + return dev_queue; } static int mq_graft(struct Qdisc *sch, unsigned long cl, struct Qdisc *new, |