[PATCHv3 net-next 6/7] net: sched: cls: add extack support for tcf_change_indev

Alexander Aring
2018-01-18T16:21:17Z

This patch adds extack handling for the tcf_change_indev function which
is common used by TC classifier implementations.

Cc: David Ahern <dsahern@gmail.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
---
include/net/pkt_cls.h | 7 +++++--
net/sched/cls_flower.c | 7 ++++---
net/sched/cls_fw.c | 2 +-
net/sched/cls_u32.c | 2 +-
4 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
index 6dd009e10e5d..2e4b8e436d25 100644
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -557,13 +557,16 @@ static inline int tcf_valid_offset(const struct sk_buff *skb,
#include <net/net_namespace.h>

static inline int
-tcf_change_indev(struct net *net, struct nlattr *indev_tlv)
+tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
+ struct netlink_ext_ack *extack)
{
char indev[IFNAMSIZ];
struct net_device *dev;

- if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
+ if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ) {
+ NL_SET_ERR_MSG(extack, "Interface name too long");
return -EINVAL;
+ }
dev = __dev_get_by_name(net, indev);
if (!dev)
return -ENODEV;
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 50145b873ff1..c6ac4a612c4a 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -526,13 +526,14 @@ static void fl_set_key_ip(struct nlattr **tb,
}

static int fl_set_key(struct net *net, struct nlattr **tb,
- struct fl_flow_key *key, struct fl_flow_key *mask)
+ struct fl_flow_key *key, struct fl_flow_key *mask,
+ struct netlink_ext_ack *extack)
{
__be16 ethertype;
int ret = 0;
#ifdef CONFIG_NET_CLS_IND
if (tb[TCA_FLOWER_INDEV]) {
- int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]);
+ int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
if (err < 0)
return err;
key->indev_ifindex = err;
@@ -841,7 +842,7 @@ static int fl_set_parms(struct net *net, struct tcf_proto *tp,
tcf_bind_filter(tp, &f->res, base);
}

- err = fl_set_key(net, tb, &f->key, &mask->key);
+ err = fl_set_key(net, tb, &f->key, &mask->key, extack);
if (err)
return err;

diff --git a/net/sched/cls_fw.c b/net/sched/cls_fw.c
index bd21ed83eb07..94d159a8869a 100644
--- a/net/sched/cls_fw.c
+++ b/net/sched/cls_fw.c
@@ -239,7 +239,7 @@ static int fw_set_parms(struct net *net, struct tcf_proto *tp,
#ifdef CONFIG_NET_CLS_IND
if (tb[TCA_FW_INDEV]) {
int ret;
- ret = tcf_change_indev(net, tb[TCA_FW_INDEV]);
+ ret = tcf_change_indev(net, tb[TCA_FW_INDEV], extack);
if (ret < 0)
return ret;
f->ifindex = ret;
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index 7f772da8e627..e8963ed35899 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -804,7 +804,7 @@ static int u32_set_parms(struct net *net, struct tcf_proto *tp,
#ifdef CONFIG_NET_CLS_IND
if (tb[TCA_U32_INDEV]) {
int ret;
- ret = tcf_change_indev(net, tb[TCA_U32_INDEV]);
+ ret = tcf_change_indev(net, tb[TCA_U32_INDEV], extack);
if (ret < 0)
return -EINVAL;
n->ifindex = ret;
--
2.11.0