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| author |   Petr Machata <petrm@mellanox.com> | 2018-05-17 16:36:45 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-05-17 16:50:06 -0400 |
| commit | c8632fc30bb03aa0c3bd7bcce85355a10feb8149 (patch) | |
| tree | dc8f3e57cd0b386e87cd43d8116485297aabd055 /net/ipv6/ip6_gre.c | |
| parent | net: ip6_gre: Split up ip6gre_newlink() (diff) | |
| download | linux-dev-c8632fc30bb03aa0c3bd7bcce85355a10feb8149.tar.xz linux-dev-c8632fc30bb03aa0c3bd7bcce85355a10feb8149.zip | |
net: ip6_gre: Split up ip6gre_changelink()
Extract from ip6gre_changelink() a reusable function
ip6gre_changelink_common(). This will allow introduction of
ERSPAN-specific _changelink() function with not a lot of code
duplication.
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/ipv6/ip6_gre.c')
| -rw-r--r-- | net/ipv6/ip6_gre.c | 33 |
1 files changed, 24 insertions, 9 deletions
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index 565e11162ac3..41fd5735f931 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -1924,37 +1924,52 @@ static int ip6gre_newlink(struct net *src_net, struct net_device *dev, return err; } -static int ip6gre_changelink(struct net_device *dev, struct nlattr *tb[], - struct nlattr *data[], - struct netlink_ext_ack *extack) +static struct ip6_tnl * +ip6gre_changelink_common(struct net_device *dev, struct nlattr *tb[], + struct nlattr *data[], struct __ip6_tnl_parm *p_p, + struct netlink_ext_ack *extack) { struct ip6_tnl *t, *nt = netdev_priv(dev); struct net *net = nt->net; struct ip6gre_net *ign = net_generic(net, ip6gre_net_id); - struct __ip6_tnl_parm p; struct ip_tunnel_encap ipencap; if (dev == ign->fb_tunnel_dev) - return -EINVAL; + return ERR_PTR(-EINVAL); if (ip6gre_netlink_encap_parms(data, &ipencap)) { int err = ip6_tnl_encap_setup(nt, &ipencap); if (err < 0) - return err; + return ERR_PTR(err); } - ip6gre_netlink_parms(data, &p); + ip6gre_netlink_parms(data, p_p); - t = ip6gre_tunnel_locate(net, &p, 0); + t = ip6gre_tunnel_locate(net, p_p, 0); if (t) { if (t->dev != dev) - return -EEXIST; + return ERR_PTR(-EEXIST); } else { t = nt; } + return t; +} + +static int ip6gre_changelink(struct net_device *dev, struct nlattr *tb[], + struct nlattr *data[], + struct netlink_ext_ack *extack) +{ + struct ip6gre_net *ign = net_generic(dev_net(dev), ip6gre_net_id); + struct __ip6_tnl_parm p; + struct ip6_tnl *t; + + t = ip6gre_changelink_common(dev, tb, data, &p, extack); + if (IS_ERR(t)) + return PTR_ERR(t); + ip6gre_tunnel_unlink(ign, t); ip6gre_tnl_change(t, &p, !tb[IFLA_MTU]); ip6gre_tunnel_link(ign, t); |