diff options
| author | David S. Miller <davem@davemloft.net> | 2016-10-20 14:51:11 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-10-20 14:51:11 -0400 |
| commit | 9e58c5dc4be31f8cf3ff62d96f91c97af6f9d58e (patch) | |
| tree | 620fee35d81bca34bc7c117ba4bc65ab28f360b0 /drivers/net/virtio_net.c | |
| parent | 1a61a8f1776758acb5111785c8a1688394fa3a60 (diff) | |
| parent | b96f9afee4eb5229c80afa3d97ccf725fb1b89a6 (diff) | |
Merge branch 'MTU-core-range-checking-more'
Jarod Wilson says:
====================
net: use core MTU range checking everywhere
This stack of patches should get absolutely everything in the kernel
converted from doing their own MTU range checking to the core MTU range
checking. This second spin includes alterations to hopefully fix all
concerns raised with the first, as well as including some additional
changes to drivers and infrastructure where I completely missed necessary
updates.
These have all been built through the 0-day build infrastructure via the
(rebasing) master branch at https://github.com/jarodwilson/linux-muck, which
at the time of the most recent compile across 147 configs, was based on
net-next at commit 7b1536ef0aa0.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/virtio_net.c')
| -rw-r--r-- | drivers/net/virtio_net.c | 23 |
1 files changed, 10 insertions, 13 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index fad84f3f4109..720809f82a0e 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -1419,17 +1419,6 @@ static const struct ethtool_ops virtnet_ethtool_ops = { .set_settings = virtnet_set_settings, }; -#define MIN_MTU 68 -#define MAX_MTU 65535 - -static int virtnet_change_mtu(struct net_device *dev, int new_mtu) -{ - if (new_mtu < MIN_MTU || new_mtu > MAX_MTU) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} - static const struct net_device_ops virtnet_netdev = { .ndo_open = virtnet_open, .ndo_stop = virtnet_close, @@ -1437,7 +1426,6 @@ static const struct net_device_ops virtnet_netdev = { .ndo_validate_addr = eth_validate_addr, .ndo_set_mac_address = virtnet_set_mac_address, .ndo_set_rx_mode = virtnet_set_rx_mode, - .ndo_change_mtu = virtnet_change_mtu, .ndo_get_stats64 = virtnet_stats, .ndo_vlan_rx_add_vid = virtnet_vlan_rx_add_vid, .ndo_vlan_rx_kill_vid = virtnet_vlan_rx_kill_vid, @@ -1748,6 +1736,9 @@ static bool virtnet_validate_features(struct virtio_device *vdev) return true; } +#define MIN_MTU ETH_MIN_MTU +#define MAX_MTU ETH_MAX_MTU + static int virtnet_probe(struct virtio_device *vdev) { int i, err; @@ -1821,6 +1812,10 @@ static int virtnet_probe(struct virtio_device *vdev) dev->vlan_features = dev->features; + /* MTU range: 68 - 65535 */ + dev->min_mtu = MIN_MTU; + dev->max_mtu = MAX_MTU; + /* Configuration may specify what MAC to use. Otherwise random. */ if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) virtio_cread_bytes(vdev, @@ -1875,8 +1870,10 @@ static int virtnet_probe(struct virtio_device *vdev) mtu = virtio_cread16(vdev, offsetof(struct virtio_net_config, mtu)); - if (virtnet_change_mtu(dev, mtu)) + if (mtu < dev->min_mtu || mtu > dev->max_mtu) __virtio_clear_bit(vdev, VIRTIO_NET_F_MTU); + else + dev->mtu = mtu; } if (vi->any_header_sg) |