In this commit, we make ip_route_input() return skb drop reasons that come
from ip_route_input_noref().
Meanwhile, adjust all the call to it.
Signed-off-by: Menglong Dong <dongml2@xxxxxxxxxxxxxxx>
---
include/net/route.h | 7 ++++---
net/bridge/br_netfilter_hooks.c | 11 ++++++-----
net/ipv4/icmp.c | 1 +
3 files changed, 11 insertions(+), 8 deletions(-)
diff --git a/include/net/route.h b/include/net/route.h
index 11674f7c6be6..f4ab5412c9c9 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -210,8 +210,9 @@ int ip_route_use_hint(struct sk_buff *skb, __be32 daddr, __be32 saddr,
dscp_t dscp, struct net_device *dev,
const struct sk_buff *hint);
-static inline int ip_route_input(struct sk_buff *skb, __be32 dst, __be32 src,
- dscp_t dscp, struct net_device *devin)
+static inline enum skb_drop_reason
+ip_route_input(struct sk_buff *skb, __be32 dst, __be32 src, dscp_t dscp,
+ struct net_device *devin)
{
enum skb_drop_reason reason;
@@ -224,7 +225,7 @@ static inline int ip_route_input(struct sk_buff *skb, __be32 dst, __be32 src,
}
rcu_read_unlock();
- return reason ? -EINVAL : 0;
+ return reason;
}
void ipv4_update_pmtu(struct sk_buff *skb, struct net *net, u32 mtu, int oif,
diff --git a/net/bridge/br_netfilter_hooks.c b/net/bridge/br_netfilter_hooks.c
index 17a5f5923d61..110cffc24a1d 100644
--- a/net/bridge/br_netfilter_hooks.c
+++ b/net/bridge/br_netfilter_hooks.c
@@ -373,8 +373,8 @@ static int br_nf_pre_routing_finish(struct net *net, struct sock *sk, struct sk_
struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
struct net_device *dev = skb->dev, *br_indev;
const struct iphdr *iph = ip_hdr(skb);
+ enum skb_drop_reason reason;
struct rtable *rt;
- int err;
br_indev = nf_bridge_get_physindev(skb, net);
if (!br_indev) {
@@ -390,9 +390,9 @@ static int br_nf_pre_routing_finish(struct net *net, struct sock *sk, struct sk_
}
nf_bridge->in_prerouting = 0;
if (br_nf_ipv4_daddr_was_changed(skb, nf_bridge)) {
- err = ip_route_input(skb, iph->daddr, iph->saddr,
- ip4h_dscp(iph), dev);
- if (err) {
+ reason = ip_route_input(skb, iph->daddr, iph->saddr,
+ ip4h_dscp(iph), dev);
+ if (reason) {
struct in_device *in_dev = __in_dev_get_rcu(dev);
/* If err equals -EHOSTUNREACH the error is due to a
@@ -402,7 +402,8 @@ static int br_nf_pre_routing_finish(struct net *net, struct sock *sk, struct sk_
* martian destinations: loopback destinations and destination
* 0.0.0.0. In both cases the packet will be dropped because the
* destination is the loopback device and not the bridge. */
- if (err != -EHOSTUNREACH || !in_dev || IN_DEV_FORWARD(in_dev))
+ if (reason != SKB_DROP_REASON_IP_INADDRERRORS || !in_dev ||
+ IN_DEV_FORWARD(in_dev))
goto free_skb;
rt = ip_route_output(net, iph->daddr, 0,
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 23664434922e..c3bafff093e0 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -546,6 +546,7 @@ static struct rtable *icmp_route_lookup(struct net *net, struct flowi4 *fl4,
skb_dst_set(skb_in, NULL);
err = ip_route_input(skb_in, fl4_dec.daddr, fl4_dec.saddr,
dscp, rt2->dst.dev);
+ err = err ? -EINVAL : 0;
dst_release(&rt2->dst);
rt2 = skb_rtable(skb_in);
--
2.39.5
