From: Nicolas Dichtel <nicolas.dich...@6wind.com>

[ Upstream commit b274e47d9e3f4dcd4ad4028a316ec22dc4533ac7 ]

During a dump, this attribute is essential, it enables the userspace to
know on which interface the context is linked to.

Fixes: 459aa660eb1d ("gtp: add initial driver for datapath of GPRS Tunneling 
Protocol (GTP-U)")
Signed-off-by: Nicolas Dichtel <nicolas.dich...@6wind.com>
Tested-by: Gabriel Ganne <gabriel.ga...@6wind.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/net/gtp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index 090607e725a24..d3ccd6929579a 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -1187,6 +1187,7 @@ static int gtp_genl_fill_info(struct sk_buff *skb, u32 
snd_portid, u32 snd_seq,
                goto nlmsg_failure;
 
        if (nla_put_u32(skb, GTPA_VERSION, pctx->gtp_version) ||
+           nla_put_u32(skb, GTPA_LINK, pctx->dev->ifindex) ||
            nla_put_be32(skb, GTPA_PEER_ADDRESS, pctx->peer_addr_ip4.s_addr) ||
            nla_put_be32(skb, GTPA_MS_ADDRESS, pctx->ms_addr_ip4.s_addr))
                goto nla_put_failure;
-- 
2.25.1



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