diff options
| author | Petr Machata <petrm@mellanox.com> | 2018-05-17 17:36:27 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-05-17 23:50:06 +0300 |
| commit | a483373ead61e6079bc8ebe27e2dfdb2e3c1559f (patch) | |
| tree | 5b44a0e3b07bf61d6b4868fe0d9129bde4dd4fa9 /net | |
| parent | 5691484df961aff897d824bcc26cd1a2aa036b5b (diff) | |
| download | linux-a483373ead61e6079bc8ebe27e2dfdb2e3c1559f.tar.xz | |
net: ip6_gre: Split up ip6gre_tnl_link_config()
The function ip6gre_tnl_link_config() is used for setting up
configuration of both ip6gretap and ip6erspan tunnels. Split the
function into the common part and the route-lookup part. The latter then
takes the calculated header length as an argument. This split will allow
the patches down the line to sneak in a custom header length computation
for the ERSPAN tunnel.
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.c | 38 |
1 files changed, 26 insertions, 12 deletions
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index 14c069b59a90..5d0a3b1ee0e9 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -1025,12 +1025,11 @@ tx_err: return NETDEV_TX_OK; } -static void ip6gre_tnl_link_config(struct ip6_tnl *t, int set_mtu) +static void ip6gre_tnl_link_config_common(struct ip6_tnl *t) { struct net_device *dev = t->dev; struct __ip6_tnl_parm *p = &t->parms; struct flowi6 *fl6 = &t->fl.u.ip6; - int t_hlen; if (dev->type != ARPHRD_ETHER) { memcpy(dev->dev_addr, &p->laddr, sizeof(struct in6_addr)); @@ -1057,12 +1056,13 @@ static void ip6gre_tnl_link_config(struct ip6_tnl *t, int set_mtu) dev->flags |= IFF_POINTOPOINT; else dev->flags &= ~IFF_POINTOPOINT; +} - t->tun_hlen = gre_calc_hlen(t->parms.o_flags); - - t->hlen = t->encap_hlen + t->tun_hlen; - - t_hlen = t->hlen + sizeof(struct ipv6hdr); +static void ip6gre_tnl_link_config_route(struct ip6_tnl *t, int set_mtu, + int t_hlen) +{ + const struct __ip6_tnl_parm *p = &t->parms; + struct net_device *dev = t->dev; if (p->flags & IP6_TNL_F_CAP_XMIT) { int strict = (ipv6_addr_type(&p->raddr) & @@ -1094,6 +1094,24 @@ static void ip6gre_tnl_link_config(struct ip6_tnl *t, int set_mtu) } } +static int ip6gre_calc_hlen(struct ip6_tnl *tunnel) +{ + int t_hlen; + + tunnel->tun_hlen = gre_calc_hlen(tunnel->parms.o_flags); + tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen; + + t_hlen = tunnel->hlen + sizeof(struct ipv6hdr); + tunnel->dev->hard_header_len = LL_MAX_HEADER + t_hlen; + return t_hlen; +} + +static void ip6gre_tnl_link_config(struct ip6_tnl *t, int set_mtu) +{ + ip6gre_tnl_link_config_common(t); + ip6gre_tnl_link_config_route(t, set_mtu, ip6gre_calc_hlen(t)); +} + static int ip6gre_tnl_change(struct ip6_tnl *t, const struct __ip6_tnl_parm *p, int set_mtu) { @@ -1387,11 +1405,7 @@ static int ip6gre_tunnel_init_common(struct net_device *dev) return ret; } - tunnel->tun_hlen = gre_calc_hlen(tunnel->parms.o_flags); - tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen; - t_hlen = tunnel->hlen + sizeof(struct ipv6hdr); - - dev->hard_header_len = LL_MAX_HEADER + t_hlen; + t_hlen = ip6gre_calc_hlen(tunnel); dev->mtu = ETH_DATA_LEN - t_hlen; if (dev->type == ARPHRD_ETHER) dev->mtu -= ETH_HLEN; |