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authorPetr Machata <petrm@mellanox.com>2018-05-17 17:36:39 +0300
committerDavid S. Miller <davem@davemloft.net>2018-05-17 23:50:06 +0300
commit7fa38a7c852ec99e3a7fc375eb2c21c50c2e46b8 (patch)
tree6c3c5fb35d5631440cdb9b0d6a255e6b575824a7 /net
parenta6465350ef495f5cbd76a3e505d25a01d648477e (diff)
downloadlinux-7fa38a7c852ec99e3a7fc375eb2c21c50c2e46b8.tar.xz
net: ip6_gre: Split up ip6gre_newlink()
Extract from ip6gre_newlink() a reusable function ip6gre_newlink_common(). The ip6gre_tnl_link_config() call needs to be made customizable for ERSPAN, thus reorder it with calls to ip6_tnl_change_mtu() and dev_hold(), and extract the whole tail to the caller, ip6gre_newlink(). Thus enable an ERSPAN-specific _newlink() function without a lot of duplicity. Fixes: 5a963eb61b7c ("ip6_gre: Add ERSPAN native tunnel support") Signed-off-by: Petr Machata <petrm@mellanox.com> Acked-by: William Tu <u9012063@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/ip6_gre.c24
1 files changed, 18 insertions, 6 deletions
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index fac820b121ae..565e11162ac3 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -1861,9 +1861,9 @@ static bool ip6gre_netlink_encap_parms(struct nlattr *data[],
return ret;
}
-static int ip6gre_newlink(struct net *src_net, struct net_device *dev,
- struct nlattr *tb[], struct nlattr *data[],
- struct netlink_ext_ack *extack)
+static int ip6gre_newlink_common(struct net *src_net, struct net_device *dev,
+ struct nlattr *tb[], struct nlattr *data[],
+ struct netlink_ext_ack *extack)
{
struct ip6_tnl *nt;
struct net *net = dev_net(dev);
@@ -1900,18 +1900,30 @@ static int ip6gre_newlink(struct net *src_net, struct net_device *dev,
if (err)
goto out;
- ip6gre_tnl_link_config(nt, !tb[IFLA_MTU]);
-
if (tb[IFLA_MTU])
ip6_tnl_change_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
dev_hold(dev);
- ip6gre_tunnel_link(ign, nt);
out:
return err;
}
+static int ip6gre_newlink(struct net *src_net, struct net_device *dev,
+ struct nlattr *tb[], struct nlattr *data[],
+ struct netlink_ext_ack *extack)
+{
+ int err = ip6gre_newlink_common(src_net, dev, tb, data, extack);
+ struct ip6_tnl *nt = netdev_priv(dev);
+ struct net *net = dev_net(dev);
+
+ if (!err) {
+ ip6gre_tnl_link_config(nt, !tb[IFLA_MTU]);
+ ip6gre_tunnel_link(net_generic(net, ip6gre_net_id), nt);
+ }
+ return err;
+}
+
static int ip6gre_changelink(struct net_device *dev, struct nlattr *tb[],
struct nlattr *data[],
struct netlink_ext_ack *extack)