From: Sasha Levin <sashal@kernel.org>
To: stable@vger.kernel.org
Cc: Liu Jian <liujian56@huawei.com>,
"David S. Miller" <davem@davemloft.net>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.15.y 1/2] net: Add helper function to parse netlink msg of ip_tunnel_encap
Date: Tue, 28 Jul 2026 08:11:15 -0400 [thread overview]
Message-ID: <20260728121116.3703252-1-sashal@kernel.org> (raw)
In-Reply-To: <2026072005-sabotage-stylized-6dae@gregkh>
From: Liu Jian <liujian56@huawei.com>
[ Upstream commit 537dd2d9fb9f4aa7939fb4fcf552ebe4f497bd7e ]
Add ip_tunnel_netlink_encap_parms to parse netlink msg of ip_tunnel_encap.
Reduces duplicate code, no actual functional changes.
Signed-off-by: Liu Jian <liujian56@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stable-dep-of: 8211a2632466 ("net: ipip: require CAP_NET_ADMIN in the device netns for changelink")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
include/net/ip_tunnels.h | 3 +++
net/ipv4/ip_tunnel_core.c | 35 +++++++++++++++++++++++++++++++++++
net/ipv4/ipip.c | 38 ++------------------------------------
net/ipv6/ip6_tunnel.c | 37 ++-----------------------------------
net/ipv6/sit.c | 38 ++------------------------------------
5 files changed, 44 insertions(+), 107 deletions(-)
diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
index 7ca06cf6e0f798..0d71e7c4c69163 100644
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -296,6 +296,9 @@ int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[],
struct ip_tunnel_parm *p, __u32 fwmark);
void ip_tunnel_setup(struct net_device *dev, unsigned int net_id);
+bool ip_tunnel_netlink_encap_parms(struct nlattr *data[],
+ struct ip_tunnel_encap *encap);
+
extern const struct header_ops ip_tunnel_header_ops;
__be16 ip_tunnel_parse_protocol(const struct sk_buff *skb);
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index f535b875a02b88..3b91b943e9a9a4 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -1091,3 +1091,38 @@ EXPORT_SYMBOL(ip_tunnel_parse_protocol);
const struct header_ops ip_tunnel_header_ops = { .parse_protocol = ip_tunnel_parse_protocol };
EXPORT_SYMBOL(ip_tunnel_header_ops);
+
+/* This function returns true when ENCAP attributes are present in the nl msg */
+bool ip_tunnel_netlink_encap_parms(struct nlattr *data[],
+ struct ip_tunnel_encap *encap)
+{
+ bool ret = false;
+
+ memset(encap, 0, sizeof(*encap));
+
+ if (!data)
+ return ret;
+
+ if (data[IFLA_IPTUN_ENCAP_TYPE]) {
+ ret = true;
+ encap->type = nla_get_u16(data[IFLA_IPTUN_ENCAP_TYPE]);
+ }
+
+ if (data[IFLA_IPTUN_ENCAP_FLAGS]) {
+ ret = true;
+ encap->flags = nla_get_u16(data[IFLA_IPTUN_ENCAP_FLAGS]);
+ }
+
+ if (data[IFLA_IPTUN_ENCAP_SPORT]) {
+ ret = true;
+ encap->sport = nla_get_be16(data[IFLA_IPTUN_ENCAP_SPORT]);
+ }
+
+ if (data[IFLA_IPTUN_ENCAP_DPORT]) {
+ ret = true;
+ encap->dport = nla_get_be16(data[IFLA_IPTUN_ENCAP_DPORT]);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ip_tunnel_netlink_encap_parms);
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 3aa78ccbec3ed8..ae4bd3a3ef8156 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -448,40 +448,6 @@ static void ipip_netlink_parms(struct nlattr *data[],
*fwmark = nla_get_u32(data[IFLA_IPTUN_FWMARK]);
}
-/* This function returns true when ENCAP attributes are present in the nl msg */
-static bool ipip_netlink_encap_parms(struct nlattr *data[],
- struct ip_tunnel_encap *ipencap)
-{
- bool ret = false;
-
- memset(ipencap, 0, sizeof(*ipencap));
-
- if (!data)
- return ret;
-
- if (data[IFLA_IPTUN_ENCAP_TYPE]) {
- ret = true;
- ipencap->type = nla_get_u16(data[IFLA_IPTUN_ENCAP_TYPE]);
- }
-
- if (data[IFLA_IPTUN_ENCAP_FLAGS]) {
- ret = true;
- ipencap->flags = nla_get_u16(data[IFLA_IPTUN_ENCAP_FLAGS]);
- }
-
- if (data[IFLA_IPTUN_ENCAP_SPORT]) {
- ret = true;
- ipencap->sport = nla_get_be16(data[IFLA_IPTUN_ENCAP_SPORT]);
- }
-
- if (data[IFLA_IPTUN_ENCAP_DPORT]) {
- ret = true;
- ipencap->dport = nla_get_be16(data[IFLA_IPTUN_ENCAP_DPORT]);
- }
-
- return ret;
-}
-
static int ipip_newlink(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack)
@@ -491,7 +457,7 @@ static int ipip_newlink(struct net *src_net, struct net_device *dev,
struct ip_tunnel_encap ipencap;
__u32 fwmark = 0;
- if (ipip_netlink_encap_parms(data, &ipencap)) {
+ if (ip_tunnel_netlink_encap_parms(data, &ipencap)) {
int err = ip_tunnel_encap_setup(t, &ipencap);
if (err < 0)
@@ -512,7 +478,7 @@ static int ipip_changelink(struct net_device *dev, struct nlattr *tb[],
bool collect_md;
__u32 fwmark = t->fwmark;
- if (ipip_netlink_encap_parms(data, &ipencap)) {
+ if (ip_tunnel_netlink_encap_parms(data, &ipencap)) {
int err = ip_tunnel_encap_setup(t, &ipencap);
if (err < 0)
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 53930c28b69469..8c7d5f391bb305 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -2005,39 +2005,6 @@ static void ip6_tnl_netlink_parms(struct nlattr *data[],
parms->fwmark = nla_get_u32(data[IFLA_IPTUN_FWMARK]);
}
-static bool ip6_tnl_netlink_encap_parms(struct nlattr *data[],
- struct ip_tunnel_encap *ipencap)
-{
- bool ret = false;
-
- memset(ipencap, 0, sizeof(*ipencap));
-
- if (!data)
- return ret;
-
- if (data[IFLA_IPTUN_ENCAP_TYPE]) {
- ret = true;
- ipencap->type = nla_get_u16(data[IFLA_IPTUN_ENCAP_TYPE]);
- }
-
- if (data[IFLA_IPTUN_ENCAP_FLAGS]) {
- ret = true;
- ipencap->flags = nla_get_u16(data[IFLA_IPTUN_ENCAP_FLAGS]);
- }
-
- if (data[IFLA_IPTUN_ENCAP_SPORT]) {
- ret = true;
- ipencap->sport = nla_get_be16(data[IFLA_IPTUN_ENCAP_SPORT]);
- }
-
- if (data[IFLA_IPTUN_ENCAP_DPORT]) {
- ret = true;
- ipencap->dport = nla_get_be16(data[IFLA_IPTUN_ENCAP_DPORT]);
- }
-
- return ret;
-}
-
static int ip6_tnl_newlink(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack)
@@ -2050,7 +2017,7 @@ static int ip6_tnl_newlink(struct net *src_net, struct net_device *dev,
nt = netdev_priv(dev);
- if (ip6_tnl_netlink_encap_parms(data, &ipencap)) {
+ if (ip_tunnel_netlink_encap_parms(data, &ipencap)) {
err = ip6_tnl_encap_setup(nt, &ipencap);
if (err < 0)
return err;
@@ -2087,7 +2054,7 @@ static int ip6_tnl_changelink(struct net_device *dev, struct nlattr *tb[],
if (dev == ip6n->fb_tnl_dev)
return -EINVAL;
- if (ip6_tnl_netlink_encap_parms(data, &ipencap)) {
+ if (ip_tunnel_netlink_encap_parms(data, &ipencap)) {
int err = ip6_tnl_encap_setup(t, &ipencap);
if (err < 0)
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 733362dcc653a4..4b16ddc3d6c7f3 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -1545,40 +1545,6 @@ static void ipip6_netlink_parms(struct nlattr *data[],
*fwmark = nla_get_u32(data[IFLA_IPTUN_FWMARK]);
}
-/* This function returns true when ENCAP attributes are present in the nl msg */
-static bool ipip6_netlink_encap_parms(struct nlattr *data[],
- struct ip_tunnel_encap *ipencap)
-{
- bool ret = false;
-
- memset(ipencap, 0, sizeof(*ipencap));
-
- if (!data)
- return ret;
-
- if (data[IFLA_IPTUN_ENCAP_TYPE]) {
- ret = true;
- ipencap->type = nla_get_u16(data[IFLA_IPTUN_ENCAP_TYPE]);
- }
-
- if (data[IFLA_IPTUN_ENCAP_FLAGS]) {
- ret = true;
- ipencap->flags = nla_get_u16(data[IFLA_IPTUN_ENCAP_FLAGS]);
- }
-
- if (data[IFLA_IPTUN_ENCAP_SPORT]) {
- ret = true;
- ipencap->sport = nla_get_be16(data[IFLA_IPTUN_ENCAP_SPORT]);
- }
-
- if (data[IFLA_IPTUN_ENCAP_DPORT]) {
- ret = true;
- ipencap->dport = nla_get_be16(data[IFLA_IPTUN_ENCAP_DPORT]);
- }
-
- return ret;
-}
-
#ifdef CONFIG_IPV6_SIT_6RD
/* This function returns true when 6RD attributes are present in the nl msg */
static bool ipip6_netlink_6rd_parms(struct nlattr *data[],
@@ -1630,7 +1596,7 @@ static int ipip6_newlink(struct net *src_net, struct net_device *dev,
nt = netdev_priv(dev);
- if (ipip6_netlink_encap_parms(data, &ipencap)) {
+ if (ip_tunnel_netlink_encap_parms(data, &ipencap)) {
err = ip_tunnel_encap_setup(nt, &ipencap);
if (err < 0)
return err;
@@ -1685,7 +1651,7 @@ static int ipip6_changelink(struct net_device *dev, struct nlattr *tb[],
if (dev == sitn->fb_tunnel_dev)
return -EINVAL;
- if (ipip6_netlink_encap_parms(data, &ipencap)) {
+ if (ip_tunnel_netlink_encap_parms(data, &ipencap)) {
err = ip_tunnel_encap_setup(t, &ipencap);
if (err < 0)
return err;
--
2.53.0
next prev parent reply other threads:[~2026-07-28 12:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-20 15:53 FAILED: patch "[PATCH] net: ipip: require CAP_NET_ADMIN in the device netns for" failed to apply to 5.15-stable tree gregkh
2026-07-28 12:11 ` Sasha Levin [this message]
2026-07-28 12:11 ` [PATCH 5.15.y 2/2] net: ipip: require CAP_NET_ADMIN in the device netns for changelink Sasha Levin
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