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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>
This commit is contained in:
Jarod Wilson
David S. Miller
parent
8b6b4135e4
commit
91572088e3
11 changed files with 84 additions and 105 deletions
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@ -1034,39 +1034,18 @@ static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
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return geneve_xmit_skb(skb, dev, info);
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}
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static int __geneve_change_mtu(struct net_device *dev, int new_mtu, bool strict)
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static int geneve_change_mtu(struct net_device *dev, int new_mtu)
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{
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struct geneve_dev *geneve = netdev_priv(dev);
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/* The max_mtu calculation does not take account of GENEVE
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* options, to avoid excluding potentially valid
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* configurations.
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/* Only possible if called internally, ndo_change_mtu path's new_mtu
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* is guaranteed to be between dev->min_mtu and dev->max_mtu.
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*/
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int max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len;
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if (geneve->remote.sa.sa_family == AF_INET6)
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max_mtu -= sizeof(struct ipv6hdr);
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else
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max_mtu -= sizeof(struct iphdr);
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if (new_mtu < 68)
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return -EINVAL;
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if (new_mtu > max_mtu) {
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if (strict)
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return -EINVAL;
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new_mtu = max_mtu;
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}
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if (new_mtu > dev->max_mtu)
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new_mtu = dev->max_mtu;
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dev->mtu = new_mtu;
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return 0;
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}
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static int geneve_change_mtu(struct net_device *dev, int new_mtu)
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{
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return __geneve_change_mtu(dev, new_mtu, true);
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}
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static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
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{
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struct ip_tunnel_info *info = skb_tunnel_info(skb);
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@ -1170,6 +1149,14 @@ static void geneve_setup(struct net_device *dev)
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dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
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dev->hw_features |= NETIF_F_GSO_SOFTWARE;
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/* MTU range: 68 - (something less than 65535) */
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dev->min_mtu = ETH_MIN_MTU;
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/* The max_mtu calculation does not take account of GENEVE
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* options, to avoid excluding potentially valid
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* configurations. This will be further reduced by IPvX hdr size.
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*/
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dev->max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len;
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netif_keep_dst(dev);
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dev->priv_flags &= ~IFF_TX_SKB_SHARING;
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dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
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@ -1285,10 +1272,13 @@ static int geneve_configure(struct net *net, struct net_device *dev,
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/* make enough headroom for basic scenario */
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encap_len = GENEVE_BASE_HLEN + ETH_HLEN;
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if (remote->sa.sa_family == AF_INET)
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if (remote->sa.sa_family == AF_INET) {
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encap_len += sizeof(struct iphdr);
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else
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dev->max_mtu -= sizeof(struct iphdr);
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} else {
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encap_len += sizeof(struct ipv6hdr);
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dev->max_mtu -= sizeof(struct ipv6hdr);
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}
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dev->needed_headroom = encap_len + ETH_HLEN;
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if (metadata) {
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@ -1488,7 +1478,7 @@ struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
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/* openvswitch users expect packet sizes to be unrestricted,
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* so set the largest MTU we can.
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*/
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err = __geneve_change_mtu(dev, IP_MAX_MTU, false);
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err = geneve_change_mtu(dev, IP_MAX_MTU);
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if (err)
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goto err;
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@ -2970,6 +2970,8 @@ static void macsec_free_netdev(struct net_device *dev)
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static void macsec_setup(struct net_device *dev)
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{
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ether_setup(dev);
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dev->min_mtu = 0;
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dev->max_mtu = ETH_MAX_MTU;
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dev->priv_flags |= IFF_NO_QUEUE;
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dev->netdev_ops = &macsec_netdev_ops;
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dev->destructor = macsec_free_netdev;
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@ -777,7 +777,7 @@ static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
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{
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struct macvlan_dev *vlan = netdev_priv(dev);
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if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
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if (vlan->lowerdev->mtu < new_mtu)
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return -EINVAL;
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dev->mtu = new_mtu;
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return 0;
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@ -1085,6 +1085,8 @@ void macvlan_common_setup(struct net_device *dev)
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{
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ether_setup(dev);
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dev->min_mtu = 0;
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dev->max_mtu = ETH_MAX_MTU;
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dev->priv_flags &= ~IFF_TX_SKB_SHARING;
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netif_keep_dst(dev);
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dev->priv_flags |= IFF_UNICAST_FLT;
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@ -1297,6 +1299,10 @@ int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
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else if (dev->mtu > lowerdev->mtu)
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return -EINVAL;
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/* MTU range: 68 - lowerdev->max_mtu */
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dev->min_mtu = ETH_MIN_MTU;
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dev->max_mtu = lowerdev->max_mtu;
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if (!tb[IFLA_ADDRESS])
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eth_hw_addr_random(dev);
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@ -433,6 +433,9 @@ static int ntb_netdev_probe(struct device *client_dev)
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ndev->netdev_ops = &ntb_netdev_ops;
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ndev->ethtool_ops = &ntb_ethtool_ops;
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ndev->min_mtu = 0;
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ndev->max_mtu = ETH_MAX_MTU;
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dev->qp = ntb_transport_create_queue(ndev, client_dev,
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&ntb_netdev_handlers);
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if (!dev->qp) {
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@ -925,18 +925,6 @@ static void tun_net_mclist(struct net_device *dev)
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*/
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}
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#define MIN_MTU 68
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#define MAX_MTU 65535
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static int
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tun_net_change_mtu(struct net_device *dev, int new_mtu)
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{
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if (new_mtu < MIN_MTU || new_mtu + dev->hard_header_len > MAX_MTU)
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return -EINVAL;
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dev->mtu = new_mtu;
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return 0;
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}
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static netdev_features_t tun_net_fix_features(struct net_device *dev,
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netdev_features_t features)
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{
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@ -1014,7 +1002,6 @@ static const struct net_device_ops tun_netdev_ops = {
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.ndo_open = tun_net_open,
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.ndo_stop = tun_net_close,
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.ndo_start_xmit = tun_net_xmit,
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.ndo_change_mtu = tun_net_change_mtu,
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.ndo_fix_features = tun_net_fix_features,
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.ndo_select_queue = tun_select_queue,
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#ifdef CONFIG_NET_POLL_CONTROLLER
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@ -1029,7 +1016,6 @@ static const struct net_device_ops tap_netdev_ops = {
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.ndo_open = tun_net_open,
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.ndo_stop = tun_net_close,
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.ndo_start_xmit = tun_net_xmit,
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.ndo_change_mtu = tun_net_change_mtu,
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.ndo_fix_features = tun_net_fix_features,
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.ndo_set_rx_mode = tun_net_mclist,
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.ndo_set_mac_address = eth_mac_addr,
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@ -1062,6 +1048,9 @@ static void tun_flow_uninit(struct tun_struct *tun)
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tun_flow_flush(tun);
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}
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#define MIN_MTU 68
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#define MAX_MTU 65535
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/* Initialize net device. */
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static void tun_net_init(struct net_device *dev)
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{
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@ -1092,6 +1081,9 @@ static void tun_net_init(struct net_device *dev)
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break;
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}
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dev->min_mtu = MIN_MTU;
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dev->max_mtu = MAX_MTU - dev->hard_header_len;
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}
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/* Character device part */
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@ -23,9 +23,6 @@
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#define DRV_NAME "veth"
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#define DRV_VERSION "1.0"
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#define MIN_MTU 68 /* Min L3 MTU */
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#define MAX_MTU 65535 /* Max L3 MTU (arbitrary) */
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struct pcpu_vstats {
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u64 packets;
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u64 bytes;
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@ -216,17 +213,9 @@ static int veth_close(struct net_device *dev)
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return 0;
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}
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static int is_valid_veth_mtu(int new_mtu)
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static int is_valid_veth_mtu(int mtu)
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{
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return new_mtu >= MIN_MTU && new_mtu <= MAX_MTU;
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}
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static int veth_change_mtu(struct net_device *dev, int new_mtu)
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{
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if (!is_valid_veth_mtu(new_mtu))
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return -EINVAL;
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dev->mtu = new_mtu;
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return 0;
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return mtu >= ETH_MIN_MTU && mtu <= ETH_MAX_MTU;
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}
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static int veth_dev_init(struct net_device *dev)
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@ -300,7 +289,6 @@ static const struct net_device_ops veth_netdev_ops = {
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.ndo_open = veth_open,
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.ndo_stop = veth_close,
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.ndo_start_xmit = veth_xmit,
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.ndo_change_mtu = veth_change_mtu,
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.ndo_get_stats64 = veth_get_stats64,
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.ndo_set_rx_mode = veth_set_multicast_list,
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.ndo_set_mac_address = eth_mac_addr,
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@ -337,6 +325,7 @@ static void veth_setup(struct net_device *dev)
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NETIF_F_HW_VLAN_CTAG_RX |
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NETIF_F_HW_VLAN_STAG_RX);
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dev->destructor = veth_dev_free;
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dev->max_mtu = ETH_MAX_MTU;
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dev->hw_features = VETH_FEATURES;
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dev->hw_enc_features = VETH_FEATURES;
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@ -2367,41 +2367,29 @@ static void vxlan_set_multicast_list(struct net_device *dev)
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{
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}
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static int __vxlan_change_mtu(struct net_device *dev,
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struct net_device *lowerdev,
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struct vxlan_rdst *dst, int new_mtu, bool strict)
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{
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int max_mtu = IP_MAX_MTU;
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if (lowerdev)
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max_mtu = lowerdev->mtu;
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if (dst->remote_ip.sa.sa_family == AF_INET6)
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max_mtu -= VXLAN6_HEADROOM;
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else
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max_mtu -= VXLAN_HEADROOM;
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if (new_mtu < 68)
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return -EINVAL;
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if (new_mtu > max_mtu) {
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if (strict)
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return -EINVAL;
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new_mtu = max_mtu;
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}
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dev->mtu = new_mtu;
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return 0;
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}
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static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
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{
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struct vxlan_dev *vxlan = netdev_priv(dev);
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struct vxlan_rdst *dst = &vxlan->default_dst;
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struct net_device *lowerdev = __dev_get_by_index(vxlan->net,
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dst->remote_ifindex);
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return __vxlan_change_mtu(dev, lowerdev, dst, new_mtu, true);
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bool use_ipv6 = false;
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if (dst->remote_ip.sa.sa_family == AF_INET6)
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use_ipv6 = true;
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/* This check is different than dev->max_mtu, because it looks at
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* the lowerdev->mtu, rather than the static dev->max_mtu
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*/
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if (lowerdev) {
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int max_mtu = lowerdev->mtu -
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(use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
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if (new_mtu > max_mtu)
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return -EINVAL;
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}
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dev->mtu = new_mtu;
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return 0;
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}
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static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
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@ -2795,6 +2783,10 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
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vxlan_ether_setup(dev);
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}
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/* MTU range: 68 - 65535 */
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dev->min_mtu = ETH_MIN_MTU;
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dev->max_mtu = ETH_MAX_MTU;
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vxlan->net = src_net;
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dst->remote_vni = conf->vni;
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@ -2838,7 +2830,8 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
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#endif
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if (!conf->mtu)
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dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
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dev->mtu = lowerdev->mtu -
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(use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
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needed_headroom = lowerdev->hard_header_len;
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} else if (vxlan_addr_multicast(&dst->remote_ip)) {
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@ -2847,9 +2840,20 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
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}
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if (conf->mtu) {
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err = __vxlan_change_mtu(dev, lowerdev, dst, conf->mtu, false);
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if (err)
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return err;
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int max_mtu = ETH_MAX_MTU;
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if (lowerdev)
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max_mtu = lowerdev->mtu;
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max_mtu -= (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
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if (conf->mtu < dev->min_mtu || conf->mtu > dev->max_mtu)
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return -EINVAL;
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dev->mtu = conf->mtu;
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if (conf->mtu > max_mtu)
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dev->mtu = max_mtu;
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}
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if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA)
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@ -826,5 +826,8 @@ void vlan_setup(struct net_device *dev)
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dev->destructor = vlan_dev_free;
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dev->ethtool_ops = &vlan_ethtool_ops;
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dev->min_mtu = 0;
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dev->max_mtu = ETH_MAX_MTU;
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eth_zero_addr(dev->broadcast);
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}
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@ -185,7 +185,7 @@ static struct rtnl_link_stats64 *br_get_stats64(struct net_device *dev,
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static int br_change_mtu(struct net_device *dev, int new_mtu)
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{
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struct net_bridge *br = netdev_priv(dev);
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if (new_mtu < 68 || new_mtu > br_min_mtu(br))
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if (new_mtu > br_min_mtu(br))
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return -EINVAL;
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dev->mtu = new_mtu;
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@ -410,6 +410,7 @@ void br_dev_setup(struct net_device *dev)
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br->bridge_hello_time = br->hello_time = 2 * HZ;
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br->bridge_forward_delay = br->forward_delay = 15 * HZ;
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br->ageing_time = BR_DEFAULT_AGEING_TIME;
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dev->max_mtu = ETH_MAX_MTU;
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br_netfilter_rtable_init(br);
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br_stp_timer_init(br);
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@ -89,15 +89,6 @@ static const struct ethtool_ops internal_dev_ethtool_ops = {
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.get_link = ethtool_op_get_link,
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};
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static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
|
||||
{
|
||||
if (new_mtu < 68)
|
||||
return -EINVAL;
|
||||
|
||||
netdev->mtu = new_mtu;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void internal_dev_destructor(struct net_device *dev)
|
||||
{
|
||||
struct vport *vport = ovs_internal_dev_get_vport(dev);
|
||||
|
|
@ -148,7 +139,6 @@ static const struct net_device_ops internal_dev_netdev_ops = {
|
|||
.ndo_stop = internal_dev_stop,
|
||||
.ndo_start_xmit = internal_dev_xmit,
|
||||
.ndo_set_mac_address = eth_mac_addr,
|
||||
.ndo_change_mtu = internal_dev_change_mtu,
|
||||
.ndo_get_stats64 = internal_get_stats,
|
||||
.ndo_set_rx_headroom = internal_set_rx_headroom,
|
||||
};
|
||||
|
|
|
|||
|
|
@ -418,9 +418,6 @@ static int teql_master_mtu(struct net_device *dev, int new_mtu)
|
|||
struct teql_master *m = netdev_priv(dev);
|
||||
struct Qdisc *q;
|
||||
|
||||
if (new_mtu < 68)
|
||||
return -EINVAL;
|
||||
|
||||
q = m->slaves;
|
||||
if (q) {
|
||||
do {
|
||||
|
|
@ -460,6 +457,8 @@ static __init void teql_master_setup(struct net_device *dev)
|
|||
dev->netdev_ops = &teql_netdev_ops;
|
||||
dev->type = ARPHRD_VOID;
|
||||
dev->mtu = 1500;
|
||||
dev->min_mtu = 68;
|
||||
dev->max_mtu = 65535;
|
||||
dev->tx_queue_len = 100;
|
||||
dev->flags = IFF_NOARP;
|
||||
dev->hard_header_len = LL_MAX_HEADER;
|
||||
|
|
|
|||
Loading…
Reference in a new issue