Commit 97763dc0 authored by Paolo Abeni's avatar Paolo Abeni Committed by David S. Miller

net_sched: reject unknown tcfa_action values

After the commit 802bfb19 ("net/sched: user-space can't set
unknown tcfa_action values"), unknown tcfa_action values are
converted to TC_ACT_UNSPEC, but the common agreement is instead
rejecting such configurations.

This change also introduces a helper to simplify the destruction
of a single action, avoiding code duplication.

v1 -> v2:
 - helper is now static and renamed according to act_* convention
 - updated extack message, according to the new behavior

Fixes: 802bfb19 ("net/sched: user-space can't set unknown tcfa_action values")
Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
Acked-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c4053ef3
...@@ -662,6 +662,13 @@ int tcf_action_destroy(struct tc_action *actions[], int bind) ...@@ -662,6 +662,13 @@ int tcf_action_destroy(struct tc_action *actions[], int bind)
return ret; return ret;
} }
static int tcf_action_destroy_1(struct tc_action *a, int bind)
{
struct tc_action *actions[] = { a, NULL };
return tcf_action_destroy(actions, bind);
}
static int tcf_action_put(struct tc_action *p) static int tcf_action_put(struct tc_action *p)
{ {
return __tcf_action_put(p, false); return __tcf_action_put(p, false);
...@@ -881,17 +888,16 @@ struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp, ...@@ -881,17 +888,16 @@ struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
if (TC_ACT_EXT_CMP(a->tcfa_action, TC_ACT_GOTO_CHAIN)) { if (TC_ACT_EXT_CMP(a->tcfa_action, TC_ACT_GOTO_CHAIN)) {
err = tcf_action_goto_chain_init(a, tp); err = tcf_action_goto_chain_init(a, tp);
if (err) { if (err) {
struct tc_action *actions[] = { a, NULL }; tcf_action_destroy_1(a, bind);
tcf_action_destroy(actions, bind);
NL_SET_ERR_MSG(extack, "Failed to init TC action chain"); NL_SET_ERR_MSG(extack, "Failed to init TC action chain");
return ERR_PTR(err); return ERR_PTR(err);
} }
} }
if (!tcf_action_valid(a->tcfa_action)) { if (!tcf_action_valid(a->tcfa_action)) {
NL_SET_ERR_MSG(extack, "invalid action value, using TC_ACT_UNSPEC instead"); tcf_action_destroy_1(a, bind);
a->tcfa_action = TC_ACT_UNSPEC; NL_SET_ERR_MSG(extack, "Invalid control action value");
return ERR_PTR(-EINVAL);
} }
return a; return a;
......
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