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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_multiq.c
parent71ebe5e91947392bc276af713827eab12b6db8e4 (diff)
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_multiq.c')
-rw-r--r--net/sched/sch_multiq.c22
1 files changed, 0 insertions, 22 deletions
diff --git a/net/sched/sch_multiq.c b/net/sched/sch_multiq.c
index 91273120304..a0ffe7158ff 100644
--- a/net/sched/sch_multiq.c
+++ b/net/sched/sch_multiq.c
@@ -348,26 +348,6 @@ static void multiq_put(struct Qdisc *q, unsigned long cl)
return;
}
-static int multiq_change(struct Qdisc *sch, u32 handle, u32 parent,
- struct nlattr **tca, unsigned long *arg)
-{
- unsigned long cl = *arg;
- struct multiq_sched_data *q = qdisc_priv(sch);
-
- if (cl - 1 > q->bands)
- return -ENOENT;
- return 0;
-}
-
-static int multiq_delete(struct Qdisc *sch, unsigned long cl)
-{
- struct multiq_sched_data *q = qdisc_priv(sch);
- if (cl - 1 > q->bands)
- return -ENOENT;
- return 0;
-}
-
-
static int multiq_dump_class(struct Qdisc *sch, unsigned long cl,
struct sk_buff *skb, struct tcmsg *tcm)
{
@@ -430,8 +410,6 @@ static const struct Qdisc_class_ops multiq_class_ops = {
.leaf = multiq_leaf,
.get = multiq_get,
.put = multiq_put,
- .change = multiq_change,
- .delete = multiq_delete,
.walk = multiq_walk,
.tcf_chain = multiq_find_tcf,
.bind_tcf = multiq_bind,