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authorJarod Wilson <jarod@redhat.com>2016-10-20 20:55:20 +0300
committerDavid S. Miller <davem@davemloft.net>2016-10-20 21:51:09 +0300
commit91572088e3fdbf4fe31cf397926d8b890fdb3237 (patch)
tree956c0634c97ac6bac987182d4c09b80c08c56b7c /drivers/net/tun.c
parent8b6b4135e4fb2b537f33b811c13f77bee25ca8d3 (diff)
downloadlinux-91572088e3fdbf4fe31cf397926d8b890fdb3237.tar.xz
net: use core MTU range checking in core net infra
geneve: - Merge __geneve_change_mtu back into geneve_change_mtu, set max_mtu - This one isn't quite as straight-forward as others, could use some closer inspection and testing macvlan: - set min/max_mtu tun: - set min/max_mtu, remove tun_net_change_mtu vxlan: - Merge __vxlan_change_mtu back into vxlan_change_mtu - Set max_mtu to IP_MAX_MTU and retain dynamic MTU range checks in change_mtu function - This one is also not as straight-forward and could use closer inspection and testing from vxlan folks bridge: - set max_mtu of IP_MAX_MTU and retain dynamic MTU range checks in change_mtu function openvswitch: - set min/max_mtu, remove internal_dev_change_mtu - note: max_mtu wasn't checked previously, it's been set to 65535, which is the largest possible size supported sch_teql: - set min/max_mtu (note: max_mtu previously unchecked, used max of 65535) macsec: - min_mtu = 0, max_mtu = 65535 macvlan: - min_mtu = 0, max_mtu = 65535 ntb_netdev: - min_mtu = 0, max_mtu = 65535 veth: - min_mtu = 68, max_mtu = 65535 8021q: - min_mtu = 0, max_mtu = 65535 CC: netdev@vger.kernel.org CC: Nicolas Dichtel <nicolas.dichtel@6wind.com> CC: Hannes Frederic Sowa <hannes@stressinduktion.org> CC: Tom Herbert <tom@herbertland.com> CC: Daniel Borkmann <daniel@iogearbox.net> CC: Alexander Duyck <alexander.h.duyck@intel.com> CC: Paolo Abeni <pabeni@redhat.com> CC: Jiri Benc <jbenc@redhat.com> CC: WANG Cong <xiyou.wangcong@gmail.com> CC: Roopa Prabhu <roopa@cumulusnetworks.com> CC: Pravin B Shelar <pshelar@ovn.org> CC: Sabrina Dubroca <sd@queasysnail.net> CC: Patrick McHardy <kaber@trash.net> CC: Stephen Hemminger <stephen@networkplumber.org> CC: Pravin Shelar <pshelar@nicira.com> CC: Maxim Krasnyansky <maxk@qti.qualcomm.com> Signed-off-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/tun.c')
-rw-r--r--drivers/net/tun.c20
1 files changed, 6 insertions, 14 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 8093e39ae263..93285687cf13 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -925,18 +925,6 @@ static void tun_net_mclist(struct net_device *dev)
*/
}
-#define MIN_MTU 68
-#define MAX_MTU 65535
-
-static int
-tun_net_change_mtu(struct net_device *dev, int new_mtu)
-{
- if (new_mtu < MIN_MTU || new_mtu + dev->hard_header_len > MAX_MTU)
- return -EINVAL;
- dev->mtu = new_mtu;
- return 0;
-}
-
static netdev_features_t tun_net_fix_features(struct net_device *dev,
netdev_features_t features)
{
@@ -1014,7 +1002,6 @@ static const struct net_device_ops tun_netdev_ops = {
.ndo_open = tun_net_open,
.ndo_stop = tun_net_close,
.ndo_start_xmit = tun_net_xmit,
- .ndo_change_mtu = tun_net_change_mtu,
.ndo_fix_features = tun_net_fix_features,
.ndo_select_queue = tun_select_queue,
#ifdef CONFIG_NET_POLL_CONTROLLER
@@ -1029,7 +1016,6 @@ static const struct net_device_ops tap_netdev_ops = {
.ndo_open = tun_net_open,
.ndo_stop = tun_net_close,
.ndo_start_xmit = tun_net_xmit,
- .ndo_change_mtu = tun_net_change_mtu,
.ndo_fix_features = tun_net_fix_features,
.ndo_set_rx_mode = tun_net_mclist,
.ndo_set_mac_address = eth_mac_addr,
@@ -1062,6 +1048,9 @@ static void tun_flow_uninit(struct tun_struct *tun)
tun_flow_flush(tun);
}
+#define MIN_MTU 68
+#define MAX_MTU 65535
+
/* Initialize net device. */
static void tun_net_init(struct net_device *dev)
{
@@ -1092,6 +1081,9 @@ static void tun_net_init(struct net_device *dev)
break;
}
+
+ dev->min_mtu = MIN_MTU;
+ dev->max_mtu = MAX_MTU - dev->hard_header_len;
}
/* Character device part */