mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
![Rick Jones](/assets/img/avatar_default.png)
Per discussion with Ben Hutchings and David Miller, go through and remove assignments of "N/A" to fw_version in various drivers' .get_drvinfo routines. While there clean-up some use of bare constants and such. Signed-off-by: Rick Jones <rick.jones2@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
457 lines
9.5 KiB
C
457 lines
9.5 KiB
C
/*
|
|
* drivers/net/veth.c
|
|
*
|
|
* Copyright (C) 2007 OpenVZ http://openvz.org, SWsoft Inc
|
|
*
|
|
* Author: Pavel Emelianov <xemul@openvz.org>
|
|
* Ethtool interface from: Eric W. Biederman <ebiederm@xmission.com>
|
|
*
|
|
*/
|
|
|
|
#include <linux/netdevice.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/ethtool.h>
|
|
#include <linux/etherdevice.h>
|
|
#include <linux/u64_stats_sync.h>
|
|
|
|
#include <net/dst.h>
|
|
#include <net/xfrm.h>
|
|
#include <linux/veth.h>
|
|
#include <linux/module.h>
|
|
|
|
#define DRV_NAME "veth"
|
|
#define DRV_VERSION "1.0"
|
|
|
|
#define MIN_MTU 68 /* Min L3 MTU */
|
|
#define MAX_MTU 65535 /* Max L3 MTU (arbitrary) */
|
|
|
|
struct veth_net_stats {
|
|
u64 rx_packets;
|
|
u64 rx_bytes;
|
|
u64 tx_packets;
|
|
u64 tx_bytes;
|
|
u64 rx_dropped;
|
|
struct u64_stats_sync syncp;
|
|
};
|
|
|
|
struct veth_priv {
|
|
struct net_device *peer;
|
|
struct veth_net_stats __percpu *stats;
|
|
};
|
|
|
|
/*
|
|
* ethtool interface
|
|
*/
|
|
|
|
static struct {
|
|
const char string[ETH_GSTRING_LEN];
|
|
} ethtool_stats_keys[] = {
|
|
{ "peer_ifindex" },
|
|
};
|
|
|
|
static int veth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
|
|
{
|
|
cmd->supported = 0;
|
|
cmd->advertising = 0;
|
|
ethtool_cmd_speed_set(cmd, SPEED_10000);
|
|
cmd->duplex = DUPLEX_FULL;
|
|
cmd->port = PORT_TP;
|
|
cmd->phy_address = 0;
|
|
cmd->transceiver = XCVR_INTERNAL;
|
|
cmd->autoneg = AUTONEG_DISABLE;
|
|
cmd->maxtxpkt = 0;
|
|
cmd->maxrxpkt = 0;
|
|
return 0;
|
|
}
|
|
|
|
static void veth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
|
|
{
|
|
strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
|
|
strlcpy(info->version, DRV_VERSION, sizeof(info->version));
|
|
}
|
|
|
|
static void veth_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
|
|
{
|
|
switch(stringset) {
|
|
case ETH_SS_STATS:
|
|
memcpy(buf, ðtool_stats_keys, sizeof(ethtool_stats_keys));
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int veth_get_sset_count(struct net_device *dev, int sset)
|
|
{
|
|
switch (sset) {
|
|
case ETH_SS_STATS:
|
|
return ARRAY_SIZE(ethtool_stats_keys);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static void veth_get_ethtool_stats(struct net_device *dev,
|
|
struct ethtool_stats *stats, u64 *data)
|
|
{
|
|
struct veth_priv *priv;
|
|
|
|
priv = netdev_priv(dev);
|
|
data[0] = priv->peer->ifindex;
|
|
}
|
|
|
|
static const struct ethtool_ops veth_ethtool_ops = {
|
|
.get_settings = veth_get_settings,
|
|
.get_drvinfo = veth_get_drvinfo,
|
|
.get_link = ethtool_op_get_link,
|
|
.get_strings = veth_get_strings,
|
|
.get_sset_count = veth_get_sset_count,
|
|
.get_ethtool_stats = veth_get_ethtool_stats,
|
|
};
|
|
|
|
/*
|
|
* xmit
|
|
*/
|
|
|
|
static netdev_tx_t veth_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct net_device *rcv = NULL;
|
|
struct veth_priv *priv, *rcv_priv;
|
|
struct veth_net_stats *stats, *rcv_stats;
|
|
int length;
|
|
|
|
priv = netdev_priv(dev);
|
|
rcv = priv->peer;
|
|
rcv_priv = netdev_priv(rcv);
|
|
|
|
stats = this_cpu_ptr(priv->stats);
|
|
rcv_stats = this_cpu_ptr(rcv_priv->stats);
|
|
|
|
/* don't change ip_summed == CHECKSUM_PARTIAL, as that
|
|
will cause bad checksum on forwarded packets */
|
|
if (skb->ip_summed == CHECKSUM_NONE &&
|
|
rcv->features & NETIF_F_RXCSUM)
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
|
|
length = skb->len;
|
|
if (dev_forward_skb(rcv, skb) != NET_RX_SUCCESS)
|
|
goto rx_drop;
|
|
|
|
u64_stats_update_begin(&stats->syncp);
|
|
stats->tx_bytes += length;
|
|
stats->tx_packets++;
|
|
u64_stats_update_end(&stats->syncp);
|
|
|
|
u64_stats_update_begin(&rcv_stats->syncp);
|
|
rcv_stats->rx_bytes += length;
|
|
rcv_stats->rx_packets++;
|
|
u64_stats_update_end(&rcv_stats->syncp);
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
rx_drop:
|
|
u64_stats_update_begin(&rcv_stats->syncp);
|
|
rcv_stats->rx_dropped++;
|
|
u64_stats_update_end(&rcv_stats->syncp);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/*
|
|
* general routines
|
|
*/
|
|
|
|
static struct rtnl_link_stats64 *veth_get_stats64(struct net_device *dev,
|
|
struct rtnl_link_stats64 *tot)
|
|
{
|
|
struct veth_priv *priv = netdev_priv(dev);
|
|
int cpu;
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
struct veth_net_stats *stats = per_cpu_ptr(priv->stats, cpu);
|
|
u64 rx_packets, rx_bytes, rx_dropped;
|
|
u64 tx_packets, tx_bytes;
|
|
unsigned int start;
|
|
|
|
do {
|
|
start = u64_stats_fetch_begin_bh(&stats->syncp);
|
|
rx_packets = stats->rx_packets;
|
|
tx_packets = stats->tx_packets;
|
|
rx_bytes = stats->rx_bytes;
|
|
tx_bytes = stats->tx_bytes;
|
|
rx_dropped = stats->rx_dropped;
|
|
} while (u64_stats_fetch_retry_bh(&stats->syncp, start));
|
|
tot->rx_packets += rx_packets;
|
|
tot->tx_packets += tx_packets;
|
|
tot->rx_bytes += rx_bytes;
|
|
tot->tx_bytes += tx_bytes;
|
|
tot->rx_dropped += rx_dropped;
|
|
}
|
|
|
|
return tot;
|
|
}
|
|
|
|
static int veth_open(struct net_device *dev)
|
|
{
|
|
struct veth_priv *priv;
|
|
|
|
priv = netdev_priv(dev);
|
|
if (priv->peer == NULL)
|
|
return -ENOTCONN;
|
|
|
|
if (priv->peer->flags & IFF_UP) {
|
|
netif_carrier_on(dev);
|
|
netif_carrier_on(priv->peer);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int veth_close(struct net_device *dev)
|
|
{
|
|
struct veth_priv *priv = netdev_priv(dev);
|
|
|
|
netif_carrier_off(dev);
|
|
netif_carrier_off(priv->peer);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int is_valid_veth_mtu(int new_mtu)
|
|
{
|
|
return new_mtu >= MIN_MTU && new_mtu <= MAX_MTU;
|
|
}
|
|
|
|
static int veth_change_mtu(struct net_device *dev, int new_mtu)
|
|
{
|
|
if (!is_valid_veth_mtu(new_mtu))
|
|
return -EINVAL;
|
|
dev->mtu = new_mtu;
|
|
return 0;
|
|
}
|
|
|
|
static int veth_dev_init(struct net_device *dev)
|
|
{
|
|
struct veth_net_stats __percpu *stats;
|
|
struct veth_priv *priv;
|
|
|
|
stats = alloc_percpu(struct veth_net_stats);
|
|
if (stats == NULL)
|
|
return -ENOMEM;
|
|
|
|
priv = netdev_priv(dev);
|
|
priv->stats = stats;
|
|
return 0;
|
|
}
|
|
|
|
static void veth_dev_free(struct net_device *dev)
|
|
{
|
|
struct veth_priv *priv;
|
|
|
|
priv = netdev_priv(dev);
|
|
free_percpu(priv->stats);
|
|
free_netdev(dev);
|
|
}
|
|
|
|
static const struct net_device_ops veth_netdev_ops = {
|
|
.ndo_init = veth_dev_init,
|
|
.ndo_open = veth_open,
|
|
.ndo_stop = veth_close,
|
|
.ndo_start_xmit = veth_xmit,
|
|
.ndo_change_mtu = veth_change_mtu,
|
|
.ndo_get_stats64 = veth_get_stats64,
|
|
.ndo_set_mac_address = eth_mac_addr,
|
|
};
|
|
|
|
static void veth_setup(struct net_device *dev)
|
|
{
|
|
ether_setup(dev);
|
|
|
|
dev->priv_flags &= ~IFF_TX_SKB_SHARING;
|
|
|
|
dev->netdev_ops = &veth_netdev_ops;
|
|
dev->ethtool_ops = &veth_ethtool_ops;
|
|
dev->features |= NETIF_F_LLTX;
|
|
dev->destructor = veth_dev_free;
|
|
|
|
dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_RXCSUM;
|
|
}
|
|
|
|
/*
|
|
* netlink interface
|
|
*/
|
|
|
|
static int veth_validate(struct nlattr *tb[], struct nlattr *data[])
|
|
{
|
|
if (tb[IFLA_ADDRESS]) {
|
|
if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
|
|
return -EINVAL;
|
|
if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
|
|
return -EADDRNOTAVAIL;
|
|
}
|
|
if (tb[IFLA_MTU]) {
|
|
if (!is_valid_veth_mtu(nla_get_u32(tb[IFLA_MTU])))
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct rtnl_link_ops veth_link_ops;
|
|
|
|
static int veth_newlink(struct net *src_net, struct net_device *dev,
|
|
struct nlattr *tb[], struct nlattr *data[])
|
|
{
|
|
int err;
|
|
struct net_device *peer;
|
|
struct veth_priv *priv;
|
|
char ifname[IFNAMSIZ];
|
|
struct nlattr *peer_tb[IFLA_MAX + 1], **tbp;
|
|
struct ifinfomsg *ifmp;
|
|
struct net *net;
|
|
|
|
/*
|
|
* create and register peer first
|
|
*/
|
|
if (data != NULL && data[VETH_INFO_PEER] != NULL) {
|
|
struct nlattr *nla_peer;
|
|
|
|
nla_peer = data[VETH_INFO_PEER];
|
|
ifmp = nla_data(nla_peer);
|
|
err = nla_parse(peer_tb, IFLA_MAX,
|
|
nla_data(nla_peer) + sizeof(struct ifinfomsg),
|
|
nla_len(nla_peer) - sizeof(struct ifinfomsg),
|
|
ifla_policy);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = veth_validate(peer_tb, NULL);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
tbp = peer_tb;
|
|
} else {
|
|
ifmp = NULL;
|
|
tbp = tb;
|
|
}
|
|
|
|
if (tbp[IFLA_IFNAME])
|
|
nla_strlcpy(ifname, tbp[IFLA_IFNAME], IFNAMSIZ);
|
|
else
|
|
snprintf(ifname, IFNAMSIZ, DRV_NAME "%%d");
|
|
|
|
net = rtnl_link_get_net(src_net, tbp);
|
|
if (IS_ERR(net))
|
|
return PTR_ERR(net);
|
|
|
|
peer = rtnl_create_link(src_net, net, ifname, &veth_link_ops, tbp);
|
|
if (IS_ERR(peer)) {
|
|
put_net(net);
|
|
return PTR_ERR(peer);
|
|
}
|
|
|
|
if (tbp[IFLA_ADDRESS] == NULL)
|
|
random_ether_addr(peer->dev_addr);
|
|
|
|
err = register_netdevice(peer);
|
|
put_net(net);
|
|
net = NULL;
|
|
if (err < 0)
|
|
goto err_register_peer;
|
|
|
|
netif_carrier_off(peer);
|
|
|
|
err = rtnl_configure_link(peer, ifmp);
|
|
if (err < 0)
|
|
goto err_configure_peer;
|
|
|
|
/*
|
|
* register dev last
|
|
*
|
|
* note, that since we've registered new device the dev's name
|
|
* should be re-allocated
|
|
*/
|
|
|
|
if (tb[IFLA_ADDRESS] == NULL)
|
|
random_ether_addr(dev->dev_addr);
|
|
|
|
if (tb[IFLA_IFNAME])
|
|
nla_strlcpy(dev->name, tb[IFLA_IFNAME], IFNAMSIZ);
|
|
else
|
|
snprintf(dev->name, IFNAMSIZ, DRV_NAME "%%d");
|
|
|
|
if (strchr(dev->name, '%')) {
|
|
err = dev_alloc_name(dev, dev->name);
|
|
if (err < 0)
|
|
goto err_alloc_name;
|
|
}
|
|
|
|
err = register_netdevice(dev);
|
|
if (err < 0)
|
|
goto err_register_dev;
|
|
|
|
netif_carrier_off(dev);
|
|
|
|
/*
|
|
* tie the deviced together
|
|
*/
|
|
|
|
priv = netdev_priv(dev);
|
|
priv->peer = peer;
|
|
|
|
priv = netdev_priv(peer);
|
|
priv->peer = dev;
|
|
return 0;
|
|
|
|
err_register_dev:
|
|
/* nothing to do */
|
|
err_alloc_name:
|
|
err_configure_peer:
|
|
unregister_netdevice(peer);
|
|
return err;
|
|
|
|
err_register_peer:
|
|
free_netdev(peer);
|
|
return err;
|
|
}
|
|
|
|
static void veth_dellink(struct net_device *dev, struct list_head *head)
|
|
{
|
|
struct veth_priv *priv;
|
|
struct net_device *peer;
|
|
|
|
priv = netdev_priv(dev);
|
|
peer = priv->peer;
|
|
|
|
unregister_netdevice_queue(dev, head);
|
|
unregister_netdevice_queue(peer, head);
|
|
}
|
|
|
|
static const struct nla_policy veth_policy[VETH_INFO_MAX + 1];
|
|
|
|
static struct rtnl_link_ops veth_link_ops = {
|
|
.kind = DRV_NAME,
|
|
.priv_size = sizeof(struct veth_priv),
|
|
.setup = veth_setup,
|
|
.validate = veth_validate,
|
|
.newlink = veth_newlink,
|
|
.dellink = veth_dellink,
|
|
.policy = veth_policy,
|
|
.maxtype = VETH_INFO_MAX,
|
|
};
|
|
|
|
/*
|
|
* init/fini
|
|
*/
|
|
|
|
static __init int veth_init(void)
|
|
{
|
|
return rtnl_link_register(&veth_link_ops);
|
|
}
|
|
|
|
static __exit void veth_exit(void)
|
|
{
|
|
rtnl_link_unregister(&veth_link_ops);
|
|
}
|
|
|
|
module_init(veth_init);
|
|
module_exit(veth_exit);
|
|
|
|
MODULE_DESCRIPTION("Virtual Ethernet Tunnel");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS_RTNL_LINK(DRV_NAME);
|