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authorDavid Ahern <dsa@cumulusnetworks.com>2016-01-04 09:09:27 -0800
committerDavid S. Miller <davem@davemloft.net>2016-01-04 22:58:30 -0500
commitb5bdacf3bb027ba0af4d61b38ec289bfc8b64372 (patch)
tree1346f43639075874a2c82c5d67dad70a3b95e493 /net
parent7ec2541aa7a026874930d6117e86fe2e76fb1587 (diff)
downloadlinux-b5bdacf3bb027ba0af4d61b38ec289bfc8b64372.tar.bz2
net: Propagate lookup failure in l3mdev_get_saddr to caller
Commands run in a vrf context are not failing as expected on a route lookup: root@kenny:~# ip ro ls table vrf-red unreachable default root@kenny:~# ping -I vrf-red -c1 -w1 10.100.1.254 ping: Warning: source address might be selected on device other than vrf-red. PING 10.100.1.254 (10.100.1.254) from 0.0.0.0 vrf-red: 56(84) bytes of data. --- 10.100.1.254 ping statistics --- 2 packets transmitted, 0 received, 100% packet loss, time 999ms Since the vrf table does not have a route for 10.100.1.254 the ping should have failed. The saddr lookup causes a full VRF table lookup. Propogating a lookup failure to the user allows the command to fail as expected: root@kenny:~# ping -I vrf-red -c1 -w1 10.100.1.254 connect: No route to host Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/raw.c7
-rw-r--r--net/ipv4/udp.c7
2 files changed, 10 insertions, 4 deletions
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 63e5be0abd86..bc35f1842512 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -601,8 +601,11 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
(inet->hdrincl ? FLOWI_FLAG_KNOWN_NH : 0),
daddr, saddr, 0, 0);
- if (!saddr && ipc.oif)
- l3mdev_get_saddr(net, ipc.oif, &fl4);
+ if (!saddr && ipc.oif) {
+ err = l3mdev_get_saddr(net, ipc.oif, &fl4);
+ if (err < 0)
+ goto done;
+ }
if (!inet->hdrincl) {
rfv.msg = msg;
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 0c7b0e61b917..c43890848641 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1025,8 +1025,11 @@ int udp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
flow_flags,
faddr, saddr, dport, inet->inet_sport);
- if (!saddr && ipc.oif)
- l3mdev_get_saddr(net, ipc.oif, fl4);
+ if (!saddr && ipc.oif) {
+ err = l3mdev_get_saddr(net, ipc.oif, fl4);
+ if (err < 0)
+ goto out;
+ }
security_sk_classify_flow(sk, flowi4_to_flowi(fl4));
rt = ip_route_output_flow(net, fl4, sk);