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authorPatrick McHardy <kaber@trash.net>2009-09-04 06:41:16 +0000
committerDavid S. Miller <davem@davemloft.net>2009-09-06 02:07:02 -0700
commitde6d5cdf881353f83006d5f3e28ac4fffd42145e (patch)
treeedc032e4d0a868578780facdd28fb0ee277aadc3 /net/sched/sch_ingress.c
parentnet_sched: make cls_ops->tcf_chain() optional (diff)
downloadlinux-dev-de6d5cdf881353f83006d5f3e28ac4fffd42145e.tar.xz
linux-dev-de6d5cdf881353f83006d5f3e28ac4fffd42145e.zip
net_sched: make cls_ops->change and cls_ops->delete optional
Some schedulers don't support creating, changing or deleting classes. Make the respective callbacks optionally and consistently return -EOPNOTSUPP for unsupported operations, instead of currently either -EOPNOTSUPP, -ENOSYS or no error. In case of sch_prio and sch_multiq, the removed operations additionally checked for an invalid class. This is not necessary since the class argument can only orginate from ->get() or in case of ->change is 0 for creation of new classes, in which case ->change() incorrectly returned -ENOENT. As a side-effect, this patch fixes a possible (root-only) NULL pointer function call in sch_ingress, which didn't implement a so far mandatory ->delete() operation. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_ingress.c')
-rw-r--r--net/sched/sch_ingress.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/net/sched/sch_ingress.c b/net/sched/sch_ingress.c
index ace7902b5097..a9e646bdb605 100644
--- a/net/sched/sch_ingress.c
+++ b/net/sched/sch_ingress.c
@@ -42,12 +42,6 @@ static void ingress_put(struct Qdisc *sch, unsigned long cl)
{
}
-static int ingress_change(struct Qdisc *sch, u32 classid, u32 parent,
- struct nlattr **tca, unsigned long *arg)
-{
- return 0;
-}
-
static void ingress_walk(struct Qdisc *sch, struct qdisc_walker *walker)
{
return;
@@ -120,7 +114,6 @@ static const struct Qdisc_class_ops ingress_class_ops = {
.leaf = ingress_leaf,
.get = ingress_get,
.put = ingress_put,
- .change = ingress_change,
.walk = ingress_walk,
.tcf_chain = ingress_find_tcf,
.bind_tcf = ingress_bind_filter,