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net_sched: Fail if missing mandatory action operation methods

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Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jamal Hadi Salim
2013-12-04 09:26:52 -05:00
committed by David S. Miller
parent e1ca87bb1b
commit 76c82d7a3d
1 changed files with 8 additions and 4 deletions
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net/sched/act_api.c
+8 -4
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@@ -270,6 +270,10 @@ int tcf_register_action(struct tc_action_ops *act)
{ {
struct tc_action_ops *a, **ap; 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); write_lock(&act_mod_lock);
for (ap = &act_base; (a = *ap) != NULL; ap = &a->next) { for (ap = &act_base; (a = *ap) != NULL; ap = &a->next) {
if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) { 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) { while ((a = act) != NULL) {
repeat: repeat:
if (a->ops && a->ops->act) { if (a->ops) {
ret = a->ops->act(skb, a, res); ret = a->ops->act(skb, a, res);
if (TC_MUNGED & skb->tc_verd) { if (TC_MUNGED & skb->tc_verd) {
/* copied already, allow trampling */ /* copied already, allow trampling */
@@ -405,7 +409,7 @@ void tcf_action_destroy(struct tc_action *act, int bind)
struct tc_action *a; struct tc_action *a;
for (a = act; a; a = act) { for (a = act; a; a = act) {
if (a->ops && a->ops->cleanup) { if (a->ops) {
if (a->ops->cleanup(a, bind) == ACT_P_DELETED) if (a->ops->cleanup(a, bind) == ACT_P_DELETED)
module_put(a->ops->owner); module_put(a->ops->owner);
act = act->next; 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; int err = -EINVAL;
if (a->ops == NULL || a->ops->dump == NULL) if (a->ops == NULL)
return err; return err;
return a->ops->dump(skb, a, bind, ref); 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); unsigned char *b = skb_tail_pointer(skb);
struct nlattr *nest; struct nlattr *nest;
if (a->ops == NULL || a->ops->dump == NULL) if (a->ops == NULL)
return err; return err;
if (nla_put_string(skb, TCA_KIND, a->ops->kind)) if (nla_put_string(skb, TCA_KIND, a->ops->kind))