WSL2-Linux-Kernel/drivers/net/netdevsim/netdev.c

396 строки
9.5 KiB
C
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/*
* Copyright (C) 2017 Netronome Systems, Inc.
*
* This software is licensed under the GNU General License Version 2,
* June 1991 as shown in the file COPYING in the top-level directory of this
* source tree.
*
* THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
* OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
* THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
*/
#include <linux/debugfs.h>
#include <linux/etherdevice.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
#include <net/netlink.h>
#include <net/pkt_cls.h>
#include <net/rtnetlink.h>
#include <net/udp_tunnel.h>
#include "netdevsim.h"
static netdev_tx_t nsim_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct netdevsim *ns = netdev_priv(dev);
if (!nsim_ipsec_tx(ns, skb))
goto out;
u64_stats_update_begin(&ns->syncp);
ns->tx_packets++;
ns->tx_bytes += skb->len;
u64_stats_update_end(&ns->syncp);
out:
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
static void nsim_set_rx_mode(struct net_device *dev)
{
}
static int nsim_change_mtu(struct net_device *dev, int new_mtu)
{
struct netdevsim *ns = netdev_priv(dev);
if (ns->xdp.prog && new_mtu > NSIM_XDP_MAX_MTU)
return -EBUSY;
dev->mtu = new_mtu;
return 0;
}
static void
nsim_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
{
struct netdevsim *ns = netdev_priv(dev);
unsigned int start;
do {
start = u64_stats_fetch_begin(&ns->syncp);
stats->tx_bytes = ns->tx_bytes;
stats->tx_packets = ns->tx_packets;
} while (u64_stats_fetch_retry(&ns->syncp, start));
}
static int
nsim_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv)
{
return nsim_bpf_setup_tc_block_cb(type, type_data, cb_priv);
}
static int nsim_set_vf_mac(struct net_device *dev, int vf, u8 *mac)
{
struct netdevsim *ns = netdev_priv(dev);
struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
/* Only refuse multicast addresses, zero address can mean unset/any. */
if (vf >= nsim_bus_dev->num_vfs || is_multicast_ether_addr(mac))
return -EINVAL;
memcpy(nsim_bus_dev->vfconfigs[vf].vf_mac, mac, ETH_ALEN);
return 0;
}
static int nsim_set_vf_vlan(struct net_device *dev, int vf,
u16 vlan, u8 qos, __be16 vlan_proto)
{
struct netdevsim *ns = netdev_priv(dev);
struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
if (vf >= nsim_bus_dev->num_vfs || vlan > 4095 || qos > 7)
return -EINVAL;
nsim_bus_dev->vfconfigs[vf].vlan = vlan;
nsim_bus_dev->vfconfigs[vf].qos = qos;
nsim_bus_dev->vfconfigs[vf].vlan_proto = vlan_proto;
return 0;
}
static int nsim_set_vf_rate(struct net_device *dev, int vf, int min, int max)
{
struct netdevsim *ns = netdev_priv(dev);
struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
if (vf >= nsim_bus_dev->num_vfs)
return -EINVAL;
nsim_bus_dev->vfconfigs[vf].min_tx_rate = min;
nsim_bus_dev->vfconfigs[vf].max_tx_rate = max;
return 0;
}
static int nsim_set_vf_spoofchk(struct net_device *dev, int vf, bool val)
{
struct netdevsim *ns = netdev_priv(dev);
struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
if (vf >= nsim_bus_dev->num_vfs)
return -EINVAL;
nsim_bus_dev->vfconfigs[vf].spoofchk_enabled = val;
return 0;
}
static int nsim_set_vf_rss_query_en(struct net_device *dev, int vf, bool val)
{
struct netdevsim *ns = netdev_priv(dev);
struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
if (vf >= nsim_bus_dev->num_vfs)
return -EINVAL;
nsim_bus_dev->vfconfigs[vf].rss_query_enabled = val;
return 0;
}
static int nsim_set_vf_trust(struct net_device *dev, int vf, bool val)
{
struct netdevsim *ns = netdev_priv(dev);
struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
if (vf >= nsim_bus_dev->num_vfs)
return -EINVAL;
nsim_bus_dev->vfconfigs[vf].trusted = val;
return 0;
}
static int
nsim_get_vf_config(struct net_device *dev, int vf, struct ifla_vf_info *ivi)
{
struct netdevsim *ns = netdev_priv(dev);
struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
if (vf >= nsim_bus_dev->num_vfs)
return -EINVAL;
ivi->vf = vf;
ivi->linkstate = nsim_bus_dev->vfconfigs[vf].link_state;
ivi->min_tx_rate = nsim_bus_dev->vfconfigs[vf].min_tx_rate;
ivi->max_tx_rate = nsim_bus_dev->vfconfigs[vf].max_tx_rate;
ivi->vlan = nsim_bus_dev->vfconfigs[vf].vlan;
ivi->vlan_proto = nsim_bus_dev->vfconfigs[vf].vlan_proto;
ivi->qos = nsim_bus_dev->vfconfigs[vf].qos;
memcpy(&ivi->mac, nsim_bus_dev->vfconfigs[vf].vf_mac, ETH_ALEN);
ivi->spoofchk = nsim_bus_dev->vfconfigs[vf].spoofchk_enabled;
ivi->trusted = nsim_bus_dev->vfconfigs[vf].trusted;
ivi->rss_query_en = nsim_bus_dev->vfconfigs[vf].rss_query_enabled;
return 0;
}
static int nsim_set_vf_link_state(struct net_device *dev, int vf, int state)
{
struct netdevsim *ns = netdev_priv(dev);
struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
if (vf >= nsim_bus_dev->num_vfs)
return -EINVAL;
switch (state) {
case IFLA_VF_LINK_STATE_AUTO:
case IFLA_VF_LINK_STATE_ENABLE:
case IFLA_VF_LINK_STATE_DISABLE:
break;
default:
return -EINVAL;
}
nsim_bus_dev->vfconfigs[vf].link_state = state;
return 0;
}
static LIST_HEAD(nsim_block_cb_list);
static int
nsim_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data)
{
struct netdevsim *ns = netdev_priv(dev);
switch (type) {
case TC_SETUP_BLOCK:
return flow_block_cb_setup_simple(type_data,
&nsim_block_cb_list,
nsim_setup_tc_block_cb,
ns, ns, true);
default:
return -EOPNOTSUPP;
}
}
static int
nsim_set_features(struct net_device *dev, netdev_features_t features)
{
struct netdevsim *ns = netdev_priv(dev);
if ((dev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC))
return nsim_bpf_disable_tc(ns);
return 0;
}
static struct devlink_port *nsim_get_devlink_port(struct net_device *dev)
{
struct netdevsim *ns = netdev_priv(dev);
return &ns->nsim_dev_port->devlink_port;
}
static const struct net_device_ops nsim_netdev_ops = {
.ndo_start_xmit = nsim_start_xmit,
.ndo_set_rx_mode = nsim_set_rx_mode,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
.ndo_change_mtu = nsim_change_mtu,
.ndo_get_stats64 = nsim_get_stats64,
.ndo_set_vf_mac = nsim_set_vf_mac,
.ndo_set_vf_vlan = nsim_set_vf_vlan,
.ndo_set_vf_rate = nsim_set_vf_rate,
.ndo_set_vf_spoofchk = nsim_set_vf_spoofchk,
.ndo_set_vf_trust = nsim_set_vf_trust,
.ndo_get_vf_config = nsim_get_vf_config,
.ndo_set_vf_link_state = nsim_set_vf_link_state,
.ndo_set_vf_rss_query_en = nsim_set_vf_rss_query_en,
.ndo_setup_tc = nsim_setup_tc,
.ndo_set_features = nsim_set_features,
.ndo_bpf = nsim_bpf,
.ndo_udp_tunnel_add = udp_tunnel_nic_add_port,
.ndo_udp_tunnel_del = udp_tunnel_nic_del_port,
.ndo_get_devlink_port = nsim_get_devlink_port,
};
static void nsim_setup(struct net_device *dev)
{
ether_setup(dev);
eth_hw_addr_random(dev);
dev->tx_queue_len = 0;
dev->flags |= IFF_NOARP;
dev->flags &= ~IFF_MULTICAST;
dev->priv_flags |= IFF_LIVE_ADDR_CHANGE |
IFF_NO_QUEUE;
dev->features |= NETIF_F_HIGHDMA |
NETIF_F_SG |
NETIF_F_FRAGLIST |
NETIF_F_HW_CSUM |
NETIF_F_TSO;
dev->hw_features |= NETIF_F_HW_TC;
dev->max_mtu = ETH_MAX_MTU;
}
struct netdevsim *
nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port)
{
struct net_device *dev;
struct netdevsim *ns;
int err;
dev = alloc_netdev(sizeof(*ns), "eth%d", NET_NAME_UNKNOWN, nsim_setup);
if (!dev)
return ERR_PTR(-ENOMEM);
dev_net_set(dev, nsim_dev_net(nsim_dev));
ns = netdev_priv(dev);
ns->netdev = dev;
ns->nsim_dev = nsim_dev;
ns->nsim_dev_port = nsim_dev_port;
ns->nsim_bus_dev = nsim_dev->nsim_bus_dev;
SET_NETDEV_DEV(dev, &ns->nsim_bus_dev->dev);
dev->netdev_ops = &nsim_netdev_ops;
nsim_ethtool_init(ns);
err = nsim_udp_tunnels_info_create(nsim_dev, dev);
if (err)
goto err_free_netdev;
rtnl_lock();
err = nsim_bpf_init(ns);
if (err)
goto err_utn_destroy;
nsim_ipsec_init(ns);
err = register_netdevice(dev);
if (err)
goto err_ipsec_teardown;
rtnl_unlock();
return ns;
err_ipsec_teardown:
nsim_ipsec_teardown(ns);
nsim_bpf_uninit(ns);
err_utn_destroy:
rtnl_unlock();
nsim_udp_tunnels_info_destroy(dev);
err_free_netdev:
free_netdev(dev);
return ERR_PTR(err);
}
void nsim_destroy(struct netdevsim *ns)
{
struct net_device *dev = ns->netdev;
rtnl_lock();
unregister_netdevice(dev);
nsim_ipsec_teardown(ns);
nsim_bpf_uninit(ns);
rtnl_unlock();
nsim_udp_tunnels_info_destroy(dev);
free_netdev(dev);
}
static int nsim_validate(struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack)
{
NL_SET_ERR_MSG_MOD(extack, "Please use: echo \"[ID] [PORT_COUNT]\" > /sys/bus/netdevsim/new_device");
return -EOPNOTSUPP;
}
static struct rtnl_link_ops nsim_link_ops __read_mostly = {
.kind = DRV_NAME,
.validate = nsim_validate,
};
static int __init nsim_module_init(void)
{
int err;
err = nsim_dev_init();
if (err)
return err;
err = nsim_bus_init();
if (err)
goto err_dev_exit;
err = rtnl_link_register(&nsim_link_ops);
if (err)
goto err_bus_exit;
return 0;
err_bus_exit:
nsim_bus_exit();
err_dev_exit:
nsim_dev_exit();
return err;
}
static void __exit nsim_module_exit(void)
{
rtnl_link_unregister(&nsim_link_ops);
nsim_bus_exit();
nsim_dev_exit();
}
module_init(nsim_module_init);
module_exit(nsim_module_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_RTNL_LINK(DRV_NAME);