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net: RTA_MARK addition

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Add a new rt attribute, RTA_MARK, and use it in
rt_fill_info()/inet_rtm_getroute() to support following commands :

ip route get 192.168.20.110 mark NUMBER
ip route get 192.168.20.108 from 192.168.20.110 iif eth1 mark NUMBER
ip route list cache [192.168.20.110] mark NUMBER

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2010-07-20 22:03:14 +00:00 committed by David S. Miller
parent e955cead03
commit 963bfeeeec
2 changed files with 8 additions and 0 deletions
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1
include/linux/rtnetlink.h
View File

@ -282,6 +282,7 @@ enum rtattr_type_t {
RTA_SESSION, /* no longer used */
RTA_MP_ALGO, /* no longer used */
RTA_TABLE,
RTA_MARK,
__RTA_MAX
};

7
net/ipv4/route.c
View File

@ -2878,6 +2878,9 @@ static int rt_fill_info(struct net *net,
if (rtnetlink_put_metrics(skb, rt->dst.metrics) < 0)
goto nla_put_failure;
if (rt->fl.mark)
NLA_PUT_BE32(skb, RTA_MARK, rt->fl.mark);
error = rt->dst.error;
expires = rt->dst.expires ? rt->dst.expires - jiffies : 0;
if (rt->peer) {
@ -2933,6 +2936,7 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
__be32 src = 0;
u32 iif;
int err;
int mark;
struct sk_buff *skb;
err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv4_policy);
@ -2960,6 +2964,7 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
src = tb[RTA_SRC] ? nla_get_be32(tb[RTA_SRC]) : 0;
dst = tb[RTA_DST] ? nla_get_be32(tb[RTA_DST]) : 0;
iif = tb[RTA_IIF] ? nla_get_u32(tb[RTA_IIF]) : 0;
mark = tb[RTA_MARK] ? nla_get_u32(tb[RTA_MARK]) : 0;
if (iif) {
struct net_device *dev;
@ -2972,6 +2977,7 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
skb->protocol = htons(ETH_P_IP);
skb->dev = dev;
skb->mark = mark;
local_bh_disable();
err = ip_route_input(skb, dst, src, rtm->rtm_tos, dev);
local_bh_enable();
@ -2989,6 +2995,7 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
},
},
.oif = tb[RTA_OIF] ? nla_get_u32(tb[RTA_OIF]) : 0,
.mark = mark,
};
err = ip_route_output_key(net, &rt, &fl);
}