From 71ebe5e91947392bc276af713827eab12b6db8e4 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Fri, 4 Sep 2009 06:41:15 +0000 Subject: net_sched: make cls_ops->tcf_chain() optional Some qdiscs don't support attaching filters. Handle this centrally in cls_api and return a proper errno code (EOPNOTSUPP) instead of EINVAL. Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/sched/cls_api.c | 5 +++++ net/sched/sch_red.c | 6 ------ net/sched/sch_tbf.c | 6 ------ 3 files changed, 5 insertions(+), 12 deletions(-) (limited to 'net/sched') diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index 09cdcdfe7e9..bcfbdb4758c 100644 --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -181,6 +181,9 @@ replay: if ((cops = q->ops->cl_ops) == NULL) return -EINVAL; + if (cops->tcf_chain == NULL) + return -EOPNOTSUPP; + /* Do we search for filter, attached to class? */ if (TC_H_MIN(parent)) { cl = cops->get(q, parent); @@ -433,6 +436,8 @@ static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb) goto out; if ((cops = q->ops->cl_ops) == NULL) goto errout; + if (cops->tcf_chain == NULL) + goto errout; if (TC_H_MIN(tcm->tcm_parent)) { cl = cops->get(q, tcm->tcm_parent); if (cl == 0) diff --git a/net/sched/sch_red.c b/net/sched/sch_red.c index 2bdf241f631..c27b8023f07 100644 --- a/net/sched/sch_red.c +++ b/net/sched/sch_red.c @@ -331,11 +331,6 @@ static void red_walk(struct Qdisc *sch, struct qdisc_walker *walker) } } -static struct tcf_proto **red_find_tcf(struct Qdisc *sch, unsigned long cl) -{ - return NULL; -} - static const struct Qdisc_class_ops red_class_ops = { .graft = red_graft, .leaf = red_leaf, @@ -344,7 +339,6 @@ static const struct Qdisc_class_ops red_class_ops = { .change = red_change_class, .delete = red_delete, .walk = red_walk, - .tcf_chain = red_find_tcf, .dump = red_dump_class, }; diff --git a/net/sched/sch_tbf.c b/net/sched/sch_tbf.c index e22dfe85e43..28909699d24 100644 --- a/net/sched/sch_tbf.c +++ b/net/sched/sch_tbf.c @@ -433,11 +433,6 @@ static void tbf_walk(struct Qdisc *sch, struct qdisc_walker *walker) } } -static struct tcf_proto **tbf_find_tcf(struct Qdisc *sch, unsigned long cl) -{ - return NULL; -} - static const struct Qdisc_class_ops tbf_class_ops = { .graft = tbf_graft, @@ -447,7 +442,6 @@ static const struct Qdisc_class_ops tbf_class_ops = .change = tbf_change_class, .delete = tbf_delete, .walk = tbf_walk, - .tcf_chain = tbf_find_tcf, .dump = tbf_dump_class, }; -- cgit v1.2.3