[NET_SCHED]: Use nla_policy for attribute validation in packet schedulers
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index 1a75579..c9c649b 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -368,9 +368,6 @@
struct netem_sched_data *q = qdisc_priv(sch);
const struct tc_netem_corr *c = nla_data(attr);
- if (nla_len(attr) != sizeof(*c))
- return -EINVAL;
-
init_crandom(&q->delay_cor, c->delay_corr);
init_crandom(&q->loss_cor, c->loss_corr);
init_crandom(&q->dup_cor, c->dup_corr);
@@ -382,9 +379,6 @@
struct netem_sched_data *q = qdisc_priv(sch);
const struct tc_netem_reorder *r = nla_data(attr);
- if (nla_len(attr) != sizeof(*r))
- return -EINVAL;
-
q->reorder = r->probability;
init_crandom(&q->reorder_cor, r->correlation);
return 0;
@@ -395,14 +389,17 @@
struct netem_sched_data *q = qdisc_priv(sch);
const struct tc_netem_corrupt *r = nla_data(attr);
- if (nla_len(attr) != sizeof(*r))
- return -EINVAL;
-
q->corrupt = r->probability;
init_crandom(&q->corrupt_cor, r->correlation);
return 0;
}
+static const struct nla_policy netem_policy[TCA_NETEM_MAX + 1] = {
+ [TCA_NETEM_CORR] = { .len = sizeof(struct tc_netem_corr) },
+ [TCA_NETEM_REORDER] = { .len = sizeof(struct tc_netem_reorder) },
+ [TCA_NETEM_CORRUPT] = { .len = sizeof(struct tc_netem_corrupt) },
+};
+
/* Parse netlink message to set options */
static int netem_change(struct Qdisc *sch, struct nlattr *opt)
{
@@ -414,8 +411,8 @@
if (opt == NULL)
return -EINVAL;
- ret = nla_parse_nested_compat(tb, TCA_NETEM_MAX, opt, NULL, qopt,
- sizeof(*qopt));
+ ret = nla_parse_nested_compat(tb, TCA_NETEM_MAX, opt, netem_policy,
+ qopt, sizeof(*qopt));
if (ret < 0)
return ret;