diff options
| author | Jarod Wilson <jarod@redhat.com> | 2016-10-20 13:55:24 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-10-20 14:51:10 -0400 |
| commit | b96f9afee4eb5229c80afa3d97ccf725fb1b89a6 (patch) | |
| tree | 620fee35d81bca34bc7c117ba4bc65ab28f360b0 /net/ipv6/sit.c | |
| parent | 46b3ef4cdf6f84c35eeacfd4c19839e0067fcfdd (diff) | |
ipv4/6: use core net MTU range checking
ipv4/ip_tunnel:
- min_mtu = 68, max_mtu = 0xFFF8 - dev->hard_header_len - t_hlen
- preserve all ndo_change_mtu checks for now to prevent regressions
ipv6/ip6_tunnel:
- min_mtu = 68, max_mtu = 0xFFF8 - dev->hard_header_len
- preserve all ndo_change_mtu checks for now to prevent regressions
ipv6/ip6_vti:
- min_mtu = 1280, max_mtu = 65535
- remove redundant vti6_change_mtu
ipv6/sit:
- min_mtu = 1280, max_mtu = 0xFFF8 - t_hlen
- remove redundant ipip6_tunnel_change_mtu
CC: netdev@vger.kernel.org
CC: "David S. Miller" <davem@davemloft.net>
CC: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
CC: James Morris <jmorris@namei.org>
CC: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
CC: Patrick McHardy <kaber@trash.net>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/sit.c')
| -rw-r--r-- | net/ipv6/sit.c | 14 |
1 files changed, 2 insertions, 12 deletions
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index b1cdf8009d29..dc7a3449ffc1 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -1318,23 +1318,11 @@ done: return err; } -static int ipip6_tunnel_change_mtu(struct net_device *dev, int new_mtu) -{ - struct ip_tunnel *tunnel = netdev_priv(dev); - int t_hlen = tunnel->hlen + sizeof(struct iphdr); - - if (new_mtu < IPV6_MIN_MTU || new_mtu > 0xFFF8 - t_hlen) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} - static const struct net_device_ops ipip6_netdev_ops = { .ndo_init = ipip6_tunnel_init, .ndo_uninit = ipip6_tunnel_uninit, .ndo_start_xmit = sit_tunnel_xmit, .ndo_do_ioctl = ipip6_tunnel_ioctl, - .ndo_change_mtu = ipip6_tunnel_change_mtu, .ndo_get_stats64 = ip_tunnel_get_stats64, .ndo_get_iflink = ip_tunnel_get_iflink, }; @@ -1365,6 +1353,8 @@ static void ipip6_tunnel_setup(struct net_device *dev) dev->type = ARPHRD_SIT; dev->hard_header_len = LL_MAX_HEADER + t_hlen; dev->mtu = ETH_DATA_LEN - t_hlen; + dev->min_mtu = IPV6_MIN_MTU; + dev->max_mtu = 0xFFF8 - t_hlen; dev->flags = IFF_NOARP; netif_keep_dst(dev); dev->addr_len = 4; |