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author | Martin KaFai Lau <kafai@fb.com> | 2015-05-22 20:56:02 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2015-05-25 13:25:34 -0400 |
commit | 48e8aa6e3137692d38f20e8bfff100e408c6bc53 (patch) | |
tree | 9527801b5b219fb0f3c1cb62c8d1e8bfc44e7a51 /net/ipv6/raw.c | |
parent | b197df4f0f3782782e9ea8996e91b65ae33e8dd9 (diff) | |
download | linux-stable-48e8aa6e3137692d38f20e8bfff100e408c6bc53.tar.gz linux-stable-48e8aa6e3137692d38f20e8bfff100e408c6bc53.tar.bz2 linux-stable-48e8aa6e3137692d38f20e8bfff100e408c6bc53.zip |
ipv6: Set FLOWI_FLAG_KNOWN_NH at flowi6_flags
The neighbor look-up used to depend on the rt6i_gateway (if
there is a gateway) or the rt6i_dst (if it is a RTF_CACHE clone)
as the nexthop address. Note that rt6i_dst is set to fl6->daddr
for the RTF_CACHE clone where fl6->daddr is the one used to do
the route look-up.
Now, we only create RTF_CACHE clone after encountering exception.
When doing the neighbor look-up with a route that is neither a gateway
nor a RTF_CACHE clone, the daddr in skb will be used as the nexthop.
In some cases, the daddr in skb is not the one used to do
the route look-up. One example is in ip_vs_dr_xmit_v6() where the
real nexthop server address is different from the one in the skb.
This patch is going to follow the IPv4 approach and ask the
ip6_pol_route() callers to set the FLOWI_FLAG_KNOWN_NH properly.
In the next patch, ip6_pol_route() will honor the FLOWI_FLAG_KNOWN_NH
and create a RTF_CACHE clone.
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Tested-by: Julian Anastasov <ja@ssi.bg>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/raw.c')
-rw-r--r-- | net/ipv6/raw.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c index 8072bd4139b7..484a5c144073 100644 --- a/net/ipv6/raw.c +++ b/net/ipv6/raw.c @@ -865,6 +865,9 @@ static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) fl6.flowi6_oif = np->ucast_oif; security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); + if (inet->hdrincl) + fl6.flowi6_flags |= FLOWI_FLAG_KNOWN_NH; + dst = ip6_dst_lookup_flow(sk, &fl6, final_p); if (IS_ERR(dst)) { err = PTR_ERR(dst); |