Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 459 insertions, 0 deletions

diff --git a/drivers/net/veth.c b/drivers/net/veth.c
new file mode 100644
index 00000000..58523610
--- /dev/null
+++ b/drivers/net/veth.c
@@ -0,0 +1,459 @@
+/*
+ *  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, &ethtool_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)
+		eth_hw_addr_random(peer);
+
+	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)
+		eth_hw_addr_random(dev);
+
+	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] = {
+	[VETH_INFO_PEER]	= { .len = sizeof(struct ifinfomsg) },
+};
+
+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);