linux-kernel - [PATCH 4.14 134/164] geneve: fix fill

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Date:   Tue, 12 Dec 2017 13:45:14 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hangbin Liu <liuhangbin@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.14 134/164] geneve: fix fill_info when link down

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Hangbin Liu <liuhangbin@...il.com>


[ Upstream commit fd7eafd02121d6ef501ef1a4a891e6061366c952 ]

geneve->sock4/6 were added with geneve_open and released with geneve_stop.
So when geneve link down, we will not able to show remote address and
checksum info after commit 11387fe4a98 ("geneve: fix fill_info when using
collect_metadata").

Fix this by avoid passing *_REMOTE{,6} for COLLECT_METADATA since they are
mutually exclusive, and always show UDP_ZERO_CSUM6_RX info.

Fixes: 11387fe4a98 ("geneve: fix fill_info when using collect_metadata")
Signed-off-by: Hangbin Liu <liuhangbin@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/geneve.c |   24 ++++++++++--------------
 1 file changed, 10 insertions(+), 14 deletions(-)

--- a/drivers/net/geneve.c
+++ b/drivers/net/geneve.c
@@ -1503,6 +1503,7 @@ static int geneve_fill_info(struct sk_bu
 {
 	struct geneve_dev *geneve = netdev_priv(dev);
 	struct ip_tunnel_info *info = &geneve->info;
+	bool metadata = geneve->collect_md;
 	__u8 tmp_vni[3];
 	__u32 vni;
 
@@ -1511,32 +1512,24 @@ static int geneve_fill_info(struct sk_bu
 	if (nla_put_u32(skb, IFLA_GENEVE_ID, vni))
 		goto nla_put_failure;
 
-	if (rtnl_dereference(geneve->sock4)) {
+	if (!metadata && ip_tunnel_info_af(info) == AF_INET) {
 		if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE,
 				    info->key.u.ipv4.dst))
 			goto nla_put_failure;
-
 		if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM,
 			       !!(info->key.tun_flags & TUNNEL_CSUM)))
 			goto nla_put_failure;
 
-	}
-
 #if IS_ENABLED(CONFIG_IPV6)
-	if (rtnl_dereference(geneve->sock6)) {
+	} else if (!metadata) {
 		if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6,
 				     &info->key.u.ipv6.dst))
 			goto nla_put_failure;
-
 		if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
 			       !(info->key.tun_flags & TUNNEL_CSUM)))
 			goto nla_put_failure;
-
-		if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
-			       !geneve->use_udp6_rx_checksums))
-			goto nla_put_failure;
-	}
 #endif
+	}
 
 	if (nla_put_u8(skb, IFLA_GENEVE_TTL, info->key.ttl) ||
 	    nla_put_u8(skb, IFLA_GENEVE_TOS, info->key.tos) ||
@@ -1546,10 +1539,13 @@ static int geneve_fill_info(struct sk_bu
 	if (nla_put_be16(skb, IFLA_GENEVE_PORT, info->key.tp_dst))
 		goto nla_put_failure;
 
-	if (geneve->collect_md) {
-		if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA))
+	if (metadata && nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA))
 			goto nla_put_failure;
-	}
+
+	if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
+		       !geneve->use_udp6_rx_checksums))
+		goto nla_put_failure;
+
 	return 0;
 
 nla_put_failure: