diff options
| author | Nicolas Dichtel <nicolas.dichtel@6wind.com> | 2012-12-04 02:03:07 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-12-07 18:24:33 +0100 |
| commit | 8caaf7b608ae27f7e7d5f5df6f87039db556d4bb (patch) | |
| tree | a2df2bfcc8e549e633cda4e3958d61aeb975b994 /net/ipv4/route.c | |
| parent | net: call notifiers for mtu change even if iface is not up (diff) | |
| download | linux-8caaf7b608ae27f7e7d5f5df6f87039db556d4bb.tar.xz linux-8caaf7b608ae27f7e7d5f5df6f87039db556d4bb.zip | |
ipv4/route/rtnl: get mcast attributes when dst is multicast
Commit f1ce3062c538 (ipv4: Remove 'rt_dst' from 'struct rtable') removes the
call to ipmr_get_route(), which will get multicast parameters of the route.
I revert the part of the patch that remove this call. I think the goal was only
to get rid of rt_dst field.
The patch is only compiled-tested. My first idea was to remove ipmr_get_route()
because rt_fill_info() was the only user, but it seems the previous patch cleans
the code a bit too much ;-)
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/route.c')
| -rw-r--r-- | net/ipv4/route.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index baa9b289d7ab..844a9ef60dbd 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -2232,8 +2232,27 @@ static int rt_fill_info(struct net *net, __be32 dst, __be32 src, error = rt->dst.error; if (rt_is_input_route(rt)) { - if (nla_put_u32(skb, RTA_IIF, rt->rt_iif)) - goto nla_put_failure; +#ifdef CONFIG_IP_MROUTE + if (ipv4_is_multicast(dst) && !ipv4_is_local_multicast(dst) && + IPV4_DEVCONF_ALL(net, MC_FORWARDING)) { + int err = ipmr_get_route(net, skb, + fl4->saddr, fl4->daddr, + r, nowait); + if (err <= 0) { + if (!nowait) { + if (err == 0) + return 0; + goto nla_put_failure; + } else { + if (err == -EMSGSIZE) + goto nla_put_failure; + error = err; + } + } + } else +#endif + if (nla_put_u32(skb, RTA_IIF, rt->rt_iif)) + goto nla_put_failure; } if (rtnl_put_cacheinfo(skb, &rt->dst, 0, expires, error) < 0) |