mirror of https://gitee.com/openkylin/linux.git
net: ipv4: RTM_GETROUTE: return matched fib result when requested
This patch adds support to return matched fib result when RTM_F_FIB_MATCH flag is specified in RTM_GETROUTE request. This is useful for user-space applications/controllers wanting to query a matching route. Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -114,6 +114,8 @@
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#include <net/ip_tunnels.h>
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#include <net/l3mdev.h>
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#include "fib_lookup.h"
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#define RT_FL_TOS(oldflp4) \
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((oldflp4)->flowi4_tos & (IPTOS_RT_MASK | RTO_ONLINK))
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@ -2746,8 +2748,15 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh,
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if (rtm->rtm_flags & RTM_F_LOOKUP_TABLE)
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table_id = rt->rt_table_id;
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err = rt_fill_info(net, dst, src, table_id, &fl4, skb,
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NETLINK_CB(in_skb).portid, nlh->nlmsg_seq, rt);
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if (rtm->rtm_flags & RTM_F_FIB_MATCH)
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err = fib_dump_info(skb, NETLINK_CB(in_skb).portid,
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nlh->nlmsg_seq, RTM_NEWROUTE, table_id,
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rt->rt_type, res.prefix, res.prefixlen,
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fl4.flowi4_tos, res.fi, 0);
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else
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err = rt_fill_info(net, dst, src, table_id, &fl4, skb,
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NETLINK_CB(in_skb).portid, nlh->nlmsg_seq,
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rt);
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if (err < 0)
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goto errout_free;
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