[PATCH 5.4 040/129] gtp: add GTPA_LINK info to msg sent to userspace

From: Greg Kroah-Hartman
Date: Tue Sep 08 2020 - 13:19:58 EST

From: Nicolas Dichtel <nicolas.dichtel@xxxxxxxxx>

[ 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.dichtel@xxxxxxxxx>
Tested-by: Gabriel Ganne <gabriel.ganne@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
drivers/net/gtp.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index d89ec99abcd63..634bdea38ecb3 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -1182,6 +1182,7 @@ 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;