netdev - [PATCH net-next V6 5/6] ipv6: add ipv6_dev

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Message-Id: <aa665807b1ab756c1db62a038fa42b6503e2e308.1617067968.git.andreas.a.roeseler@gmail.com>
Date:   Mon, 29 Mar 2021 18:45:43 -0700
From:   Andreas Roeseler <andreas.a.roeseler@...il.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, yoshfuji@...ux-ipv6.org, dsahern@...nel.org,
        kuba@...nel.org, Andreas Roeseler <andreas.a.roeseler@...il.com>
Subject: [PATCH net-next V6 5/6] ipv6: add ipv6_dev_find to stubs

Add ipv6_dev_find to ipv6_stub to allow lookup of net_devices by IPV6
address in net/ipv4/icmp.c.

Signed-off-by: Andreas Roeseler <andreas.a.roeseler@...il.com>
---
 include/net/ipv6_stubs.h | 2 ++
 net/ipv6/addrconf_core.c | 7 +++++++
 net/ipv6/af_inet6.c      | 1 +
 3 files changed, 10 insertions(+)

diff --git a/include/net/ipv6_stubs.h b/include/net/ipv6_stubs.h
index 8fce558b5fea..afbce90c4480 100644
--- a/include/net/ipv6_stubs.h
+++ b/include/net/ipv6_stubs.h
@@ -66,6 +66,8 @@ struct ipv6_stub {
 
 	int (*ipv6_fragment)(struct net *net, struct sock *sk, struct sk_buff *skb,
 			     int (*output)(struct net *, struct sock *, struct sk_buff *));
+	struct net_device *(*ipv6_dev_find)(struct net *net, const struct in6_addr *addr,
+					    struct net_device *dev);
 };
 extern const struct ipv6_stub *ipv6_stub __read_mostly;
 
diff --git a/net/ipv6/addrconf_core.c b/net/ipv6/addrconf_core.c
index a36626afbc02..1d4054bb345b 100644
--- a/net/ipv6/addrconf_core.c
+++ b/net/ipv6/addrconf_core.c
@@ -198,6 +198,12 @@ static int eafnosupport_ipv6_fragment(struct net *net, struct sock *sk, struct s
 	return -EAFNOSUPPORT;
 }
 
+static struct net_device *eafnosupport_ipv6_dev_find(struct net *net, const struct in6_addr *addr,
+						     struct net_device *dev)
+{
+	return ERR_PTR(-EAFNOSUPPORT);
+}
+
 const struct ipv6_stub *ipv6_stub __read_mostly = &(struct ipv6_stub) {
 	.ipv6_dst_lookup_flow = eafnosupport_ipv6_dst_lookup_flow,
 	.ipv6_route_input  = eafnosupport_ipv6_route_input,
@@ -209,6 +215,7 @@ const struct ipv6_stub *ipv6_stub __read_mostly = &(struct ipv6_stub) {
 	.fib6_nh_init	   = eafnosupport_fib6_nh_init,
 	.ip6_del_rt	   = eafnosupport_ip6_del_rt,
 	.ipv6_fragment	   = eafnosupport_ipv6_fragment,
+	.ipv6_dev_find     = eafnosupport_ipv6_dev_find,
 };
 EXPORT_SYMBOL_GPL(ipv6_stub);
 
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 3c9bacffc9c3..4f7ca5807046 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -1032,6 +1032,7 @@ static const struct ipv6_stub ipv6_stub_impl = {
 #endif
 	.nd_tbl	= &nd_tbl,
 	.ipv6_fragment = ip6_fragment,
+	.ipv6_dev_find = ipv6_dev_find,
 };
 
 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
-- 
2.17.1