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authorJamal Hadi Salim <jhs@mojatatu.com>2013-12-04 09:26:52 -0500
committerDavid S. Miller <davem@davemloft.net>2013-12-05 19:28:42 -0500
commit76c82d7a3d24a4ae1f9b098287c18055546c1a47 (patch)
tree2c0f3f545ffb0de469a8d816b60c65f8de70f65c /net
parente1ca87bb1b64b044163e686ff3bb71405156c561 (diff)
downloadlinux-76c82d7a3d24a4ae1f9b098287c18055546c1a47.tar.bz2
net_sched: Fail if missing mandatory action operation methods
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sched/act_api.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index fd7072827a40..618695e84190 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -270,6 +270,10 @@ int tcf_register_action(struct tc_action_ops *act)
{
struct tc_action_ops *a, **ap;
+ /* Must supply act, dump, cleanup and init */
+ if (!act->act || !act->dump || !act->cleanup || !act->init)
+ return -EINVAL;
+
write_lock(&act_mod_lock);
for (ap = &act_base; (a = *ap) != NULL; ap = &a->next) {
if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) {
@@ -381,7 +385,7 @@ int tcf_action_exec(struct sk_buff *skb, const struct tc_action *act,
}
while ((a = act) != NULL) {
repeat:
- if (a->ops && a->ops->act) {
+ if (a->ops) {
ret = a->ops->act(skb, a, res);
if (TC_MUNGED & skb->tc_verd) {
/* copied already, allow trampling */
@@ -405,7 +409,7 @@ void tcf_action_destroy(struct tc_action *act, int bind)
struct tc_action *a;
for (a = act; a; a = act) {
- if (a->ops && a->ops->cleanup) {
+ if (a->ops) {
if (a->ops->cleanup(a, bind) == ACT_P_DELETED)
module_put(a->ops->owner);
act = act->next;
@@ -424,7 +428,7 @@ tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
{
int err = -EINVAL;
- if (a->ops == NULL || a->ops->dump == NULL)
+ if (a->ops == NULL)
return err;
return a->ops->dump(skb, a, bind, ref);
}
@@ -436,7 +440,7 @@ tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
unsigned char *b = skb_tail_pointer(skb);
struct nlattr *nest;
- if (a->ops == NULL || a->ops->dump == NULL)
+ if (a->ops == NULL)
return err;
if (nla_put_string(skb, TCA_KIND, a->ops->kind))