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Message-Id: <20211209092806.12336-12-simon.horman@corigine.com>
Date: Thu, 9 Dec 2021 10:28:05 +0100
From: Simon Horman <simon.horman@...igine.com>
To: netdev@...r.kernel.org
Cc: Cong Wang <xiyou.wangcong@...il.com>,
Dan Carpenter <dan.carpenter@...cle.com>,
Ido Schimmel <idosch@...dia.com>,
Jamal Hadi Salim <jhs@...atatu.com>,
Jiri Pirko <jiri@...nulli.us>, Oz Shlomo <ozsh@...dia.com>,
Roi Dayan <roid@...dia.com>, Vlad Buslov <vladbu@...dia.com>,
Baowen Zheng <baowen.zheng@...igine.com>,
Louis Peens <louis.peens@...igine.com>,
oss-drivers@...igine.com, Simon Horman <simon.horman@...igine.com>
Subject: [PATCH v6 net-next 11/12] flow_offload: validate flags of filter and actions
From: Baowen Zheng <baowen.zheng@...igine.com>
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@...igine.com>
Signed-off-by: Louis Peens <louis.peens@...igine.com>
Signed-off-by: Simon Horman <simon.horman@...igine.com>
---
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 87ad1d3f2063..39daa1bf1af5 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 1942fe72b3e3..55abc3c1d761 100644
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -326,6 +326,9 @@ 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 668e596b539c..47532806dabd 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -1384,7 +1384,8 @@ 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] = {};
@@ -1422,7 +1423,18 @@ 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;
@@ -1925,7 +1937,7 @@ 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 2a1cc7fe2dd9..0894a1c90943 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 aab13ba11767..c3a104832a17 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 24f0046ce0b3..a0c2a81d5762 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
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