From: Baowen Zheng <baowen.zheng@xxxxxxxxxxxx>
Add process to validate flags of filter and actions when adding
a tc filter.
We need to prevent adding filter with flags conflicts with its actions.
Signed-off-by: Baowen Zheng <baowen.zheng@xxxxxxxxxxxx>
Signed-off-by: Louis Peens <louis.peens@xxxxxxxxxxxx>
Signed-off-by: Simon Horman <simon.horman@xxxxxxxxxxxx>
Acked-by: Jamal Hadi Salim <jhs@xxxxxxxxxxxx>
---
include/net/act_api.h | 2 +-
include/net/pkt_cls.h | 3 +++
net/sched/act_api.c | 18 +++++++++++++++---
net/sched/cls_api.c | 18 ++++++++++++++----
net/sched/cls_flower.c | 9 ++++++---
net/sched/cls_matchall.c | 9 +++++----
net/sched/cls_u32.c | 12 +++++++-----
7 files changed, 51 insertions(+), 20 deletions(-)
diff --git a/include/net/act_api.h b/include/net/act_api.h
index 0f5f69deb3ce..3049cb69c025 100644
--- a/include/net/act_api.h
+++ b/include/net/act_api.h
@@ -203,7 +203,7 @@ int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
struct nlattr *est,
struct tc_action *actions[], int init_res[], size_t *attr_size,
- u32 flags, struct netlink_ext_ack *extack);
+ u32 flags, u32 fl_flags, struct netlink_ext_ack *extack);
struct tc_action_ops *tc_action_load_ops(struct nlattr *nla, bool police,
bool rtnl_held,
struct netlink_ext_ack *extack);
diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
index 9021e29694c9..8a2f4579081c 100644
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -330,6 +330,9 @@ int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
struct nlattr **tb, struct nlattr *rate_tlv,
struct tcf_exts *exts, u32 flags,
struct netlink_ext_ack *extack);
+int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
+ struct nlattr *rate_tlv, struct tcf_exts *exts,
+ u32 flags, u32 fl_flags, struct netlink_ext_ack *extack);
void tcf_exts_destroy(struct tcf_exts *exts);
void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 0103e44e241f..91967f6a6c03 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -1385,7 +1385,8 @@ static bool tc_act_bind(u32 flags)
int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
struct nlattr *est, struct tc_action *actions[],
- int init_res[], size_t *attr_size, u32 flags,
+ int init_res[], size_t *attr_size,
+ u32 flags, u32 fl_flags,
struct netlink_ext_ack *extack)
{
struct tc_action_ops *ops[TCA_ACT_MAX_PRIO] = {};
@@ -1423,7 +1424,18 @@ int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
sz += tcf_action_fill_size(act);
/* Start from index 0 */
actions[i - 1] = act;
- if (!tc_act_bind(flags)) {
+ if (tc_act_bind(flags)) {
+ bool skip_sw = tc_skip_sw(fl_flags);
+ bool skip_hw = tc_skip_hw(fl_flags);
+
+ if (tc_act_bind(act->tcfa_flags))
+ continue;
+ if (skip_sw != tc_act_skip_sw(act->tcfa_flags) ||
+ skip_hw != tc_act_skip_hw(act->tcfa_flags)) {
+ err = -EINVAL;
+ goto err;
+ }
+ } else {
err = tcf_action_offload_add(act, extack);
if (tc_act_skip_sw(act->tcfa_flags) && err)
goto err;
@@ -1926,7 +1938,7 @@ static int tcf_action_add(struct net *net, struct nlattr *nla,
for (loop = 0; loop < 10; loop++) {
ret = tcf_action_init(net, NULL, nla, NULL, actions, init_res,
- &attr_size, flags, extack);
+ &attr_size, flags, 0, extack);
if (ret != -EAGAIN)
break;
}
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 353e1eed48be..e3e26d358c7f 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -3025,9 +3025,9 @@ void tcf_exts_destroy(struct tcf_exts *exts)
}
EXPORT_SYMBOL(tcf_exts_destroy);
-int tcf_exts_validate(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
- struct nlattr *rate_tlv, struct tcf_exts *exts,
- u32 flags, struct netlink_ext_ack *extack)
+int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
+ struct nlattr *rate_tlv, struct tcf_exts *exts,
+ u32 flags, u32 fl_flags, struct netlink_ext_ack *extack)
{
#ifdef CONFIG_NET_CLS_ACT
{
@@ -3061,7 +3061,8 @@ int tcf_exts_validate(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
flags |= TCA_ACT_FLAGS_BIND;
err = tcf_action_init(net, tp, tb[exts->action],
rate_tlv, exts->actions, init_res,
- &attr_size, flags, extack);
+ &attr_size, flags, fl_flags,
+ extack);
if (err < 0)
return err;
exts->nr_actions = err;
@@ -3077,6 +3078,15 @@ int tcf_exts_validate(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
return 0;
}
+EXPORT_SYMBOL(tcf_exts_validate_ex);
+
+int tcf_exts_validate(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
+ struct nlattr *rate_tlv, struct tcf_exts *exts,
+ u32 flags, struct netlink_ext_ack *extack)
+{
+ return tcf_exts_validate_ex(net, tp, tb, rate_tlv, exts,
+ flags, 0, extack);
+}
EXPORT_SYMBOL(tcf_exts_validate);
void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src)
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index f4dad3be31c9..1e5caad4f7c8 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -1917,12 +1917,14 @@ static int fl_set_parms(struct net *net, struct tcf_proto *tp,
struct cls_fl_filter *f, struct fl_flow_mask *mask,
unsigned long base, struct nlattr **tb,
struct nlattr *est,
- struct fl_flow_tmplt *tmplt, u32 flags,
+ struct fl_flow_tmplt *tmplt,
+ u32 flags, u32 fl_flags,
struct netlink_ext_ack *extack)
{
int err;
- err = tcf_exts_validate(net, tp, tb, est, &f->exts, flags, extack);
+ err = tcf_exts_validate_ex(net, tp, tb, est, &f->exts, flags,
+ fl_flags, extack);
if (err < 0)
return err;
@@ -2036,7 +2038,8 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
}
err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE],
- tp->chain->tmplt_priv, flags, extack);
+ tp->chain->tmplt_priv, flags, fnew->flags,
+ extack);
if (err)
goto errout;
diff --git a/net/sched/cls_matchall.c b/net/sched/cls_matchall.c
index 2d2702915cfa..13f7a9ecd89a 100644
--- a/net/sched/cls_matchall.c
+++ b/net/sched/cls_matchall.c
@@ -163,12 +163,13 @@ static const struct nla_policy mall_policy[TCA_MATCHALL_MAX + 1] = {
static int mall_set_parms(struct net *net, struct tcf_proto *tp,
struct cls_mall_head *head,
unsigned long base, struct nlattr **tb,
- struct nlattr *est, u32 flags,
+ struct nlattr *est, u32 flags, u32 fl_flags,
struct netlink_ext_ack *extack)
{
int err;
- err = tcf_exts_validate(net, tp, tb, est, &head->exts, flags, extack);
+ err = tcf_exts_validate_ex(net, tp, tb, est, &head->exts, flags,
+ fl_flags, extack);
if (err < 0)
return err;
@@ -226,8 +227,8 @@ static int mall_change(struct net *net, struct sk_buff *in_skb,
goto err_alloc_percpu;
}
- err = mall_set_parms(net, tp, new, base, tb, tca[TCA_RATE], flags,
- extack);
+ err = mall_set_parms(net, tp, new, base, tb, tca[TCA_RATE],
+ flags, new->flags, extack);
if (err)
goto err_set_parms;
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index 4272814487f0..cf5649292ee0 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -709,12 +709,13 @@ static const struct nla_policy u32_policy[TCA_U32_MAX + 1] = {
static int u32_set_parms(struct net *net, struct tcf_proto *tp,
unsigned long base,
struct tc_u_knode *n, struct nlattr **tb,
- struct nlattr *est, u32 flags,
+ struct nlattr *est, u32 flags, u32 fl_flags,
struct netlink_ext_ack *extack)
{
int err;
- err = tcf_exts_validate(net, tp, tb, est, &n->exts, flags, extack);
+ err = tcf_exts_validate_ex(net, tp, tb, est, &n->exts, flags,
+ fl_flags, extack);
if (err < 0)
return err;
@@ -895,7 +896,8 @@ static int u32_change(struct net *net, struct sk_buff *in_skb,
return -ENOMEM;
err = u32_set_parms(net, tp, base, new, tb,
- tca[TCA_RATE], flags, extack);
+ tca[TCA_RATE], flags, new->flags,
+ extack);
if (err) {
u32_destroy_key(new, false);
@@ -1060,8 +1062,8 @@ static int u32_change(struct net *net, struct sk_buff *in_skb,
}
#endif
- err = u32_set_parms(net, tp, base, n, tb, tca[TCA_RATE], flags,
- extack);
+ err = u32_set_parms(net, tp, base, n, tb, tca[TCA_RATE],
+ flags, n->flags, extack);
if (err == 0) {
struct tc_u_knode __rcu **ins;
struct tc_u_knode *pins;
--
2.20.1
