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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_red.c
parent71ebe5e91947392bc276af713827eab12b6db8e4 (diff)
downloadop-kernel-dev-de6d5cdf881353f83006d5f3e28ac4fffd42145e.zip
op-kernel-dev-de6d5cdf881353f83006d5f3e28ac4fffd42145e.tar.gz
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_red.c')
-rw-r--r--net/sched/sch_red.c13
1 files changed, 0 insertions, 13 deletions
diff --git a/net/sched/sch_red.c b/net/sched/sch_red.c
index c27b802..a2c4d1a 100644
--- a/net/sched/sch_red.c
+++ b/net/sched/sch_red.c
@@ -308,17 +308,6 @@ static void red_put(struct Qdisc *sch, unsigned long arg)
return;
}
-static int red_change_class(struct Qdisc *sch, u32 classid, u32 parentid,
- struct nlattr **tca, unsigned long *arg)
-{
- return -ENOSYS;
-}
-
-static int red_delete(struct Qdisc *sch, unsigned long cl)
-{
- return -ENOSYS;
-}
-
static void red_walk(struct Qdisc *sch, struct qdisc_walker *walker)
{
if (!walker->stop) {
@@ -336,8 +325,6 @@ static const struct Qdisc_class_ops red_class_ops = {
.leaf = red_leaf,
.get = red_get,
.put = red_put,
- .change = red_change_class,
- .delete = red_delete,
.walk = red_walk,
.dump = red_dump_class,
};
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