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Date: Tue, 24 Jul 2007 15:33:52 -0700 From: PJ Waskiewicz <peter.p.waskiewicz.jr@...el.com> To: davem@...emloft.net Cc: netdev@...r.kernel.org, kaber@...sh.net Subject: [PATCH 1/2] NET: Fix sch_api to properly set sch->parent on the root qdisc From: Patrick McHardy <kaber@...sh.net> Fix sch_api to correctly set sch->parent for both ingress and egress qdiscs in qdisc_create(). Signed-off-by: Patrick McHardy <trash@...er.net> Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com> --- net/sched/sch_api.c | 17 ++++++++++++----- 1 files changed, 12 insertions(+), 5 deletions(-) diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index 13c09bc..dee0d5f 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -380,6 +380,10 @@ void qdisc_tree_decrease_qlen(struct Qdisc *sch, unsigned int n) return; while ((parentid = sch->parent)) { sch = qdisc_lookup(sch->dev, TC_H_MAJ(parentid)); + if (sch == NULL) { + WARN_ON(parentid != TC_H_ROOT); + return; + } cops = sch->ops->cl_ops; if (cops->qlen_notify) { cl = cops->get(sch, parentid); @@ -420,8 +424,6 @@ static int qdisc_graft(struct net_device *dev, struct Qdisc *parent, unsigned long cl = cops->get(parent, classid); if (cl) { err = cops->graft(parent, cl, new, old); - if (new) - new->parent = classid; cops->put(parent, cl); } } @@ -436,7 +438,8 @@ static int qdisc_graft(struct net_device *dev, struct Qdisc *parent, */ static struct Qdisc * -qdisc_create(struct net_device *dev, u32 handle, struct rtattr **tca, int *errp) +qdisc_create(struct net_device *dev, u32 parent, u32 handle, + struct rtattr **tca, int *errp) { int err; struct rtattr *kind = tca[TCA_KIND-1]; @@ -482,6 +485,8 @@ qdisc_create(struct net_device *dev, u32 handle, struct rtattr **tca, int *errp) goto err_out2; } + sch->parent = parent; + if (handle == TC_H_INGRESS) { sch->flags |= TCQ_F_INGRESS; sch->stats_lock = &dev->ingress_lock; @@ -758,9 +763,11 @@ create_n_graft: if (!(n->nlmsg_flags&NLM_F_CREATE)) return -ENOENT; if (clid == TC_H_INGRESS) - q = qdisc_create(dev, tcm->tcm_parent, tca, &err); + q = qdisc_create(dev, tcm->tcm_parent, tcm->tcm_parent, + tca, &err); else - q = qdisc_create(dev, tcm->tcm_handle, tca, &err); + q = qdisc_create(dev, tcm->tcm_parent, tcm->tcm_handle, + tca, &err); if (q == NULL) { if (err == -EAGAIN) goto replay; - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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