442 lines
10 KiB
C
442 lines
10 KiB
C
/*
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* Copyright (C) 2017 Netronome Systems, Inc.
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*
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* This software is licensed under the GNU General License Version 2,
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* June 1991 as shown in the file COPYING in the top-level directory of this
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* source tree.
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*
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* THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
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* OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
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* THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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*/
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#include <linux/debugfs.h>
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#include <linux/etherdevice.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/slab.h>
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#include <net/netlink.h>
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#include <net/pkt_cls.h>
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#include <net/rtnetlink.h>
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#include <net/udp_tunnel.h>
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#include "netdevsim.h"
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static netdev_tx_t nsim_start_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct netdevsim *ns = netdev_priv(dev);
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if (!nsim_ipsec_tx(ns, skb))
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goto out;
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u64_stats_update_begin(&ns->syncp);
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ns->tx_packets++;
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ns->tx_bytes += skb->len;
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u64_stats_update_end(&ns->syncp);
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out:
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dev_kfree_skb(skb);
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return NETDEV_TX_OK;
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}
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static void nsim_set_rx_mode(struct net_device *dev)
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{
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}
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static int nsim_change_mtu(struct net_device *dev, int new_mtu)
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{
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struct netdevsim *ns = netdev_priv(dev);
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if (ns->xdp.prog && new_mtu > NSIM_XDP_MAX_MTU)
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return -EBUSY;
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dev->mtu = new_mtu;
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return 0;
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}
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static void
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nsim_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
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{
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struct netdevsim *ns = netdev_priv(dev);
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unsigned int start;
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do {
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start = u64_stats_fetch_begin_irq(&ns->syncp);
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stats->tx_bytes = ns->tx_bytes;
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stats->tx_packets = ns->tx_packets;
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} while (u64_stats_fetch_retry_irq(&ns->syncp, start));
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}
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static int
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nsim_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv)
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{
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return nsim_bpf_setup_tc_block_cb(type, type_data, cb_priv);
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}
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static int nsim_set_vf_mac(struct net_device *dev, int vf, u8 *mac)
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{
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struct netdevsim *ns = netdev_priv(dev);
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struct nsim_dev *nsim_dev = ns->nsim_dev;
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/* Only refuse multicast addresses, zero address can mean unset/any. */
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if (vf >= nsim_dev_get_vfs(nsim_dev) || is_multicast_ether_addr(mac))
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return -EINVAL;
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memcpy(nsim_dev->vfconfigs[vf].vf_mac, mac, ETH_ALEN);
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return 0;
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}
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static int nsim_set_vf_vlan(struct net_device *dev, int vf,
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u16 vlan, u8 qos, __be16 vlan_proto)
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{
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struct netdevsim *ns = netdev_priv(dev);
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struct nsim_dev *nsim_dev = ns->nsim_dev;
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if (vf >= nsim_dev_get_vfs(nsim_dev) || vlan > 4095 || qos > 7)
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return -EINVAL;
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nsim_dev->vfconfigs[vf].vlan = vlan;
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nsim_dev->vfconfigs[vf].qos = qos;
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nsim_dev->vfconfigs[vf].vlan_proto = vlan_proto;
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return 0;
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}
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static int nsim_set_vf_rate(struct net_device *dev, int vf, int min, int max)
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{
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struct netdevsim *ns = netdev_priv(dev);
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struct nsim_dev *nsim_dev = ns->nsim_dev;
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if (nsim_esw_mode_is_switchdev(ns->nsim_dev)) {
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pr_err("Not supported in switchdev mode. Please use devlink API.\n");
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return -EOPNOTSUPP;
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}
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if (vf >= nsim_dev_get_vfs(nsim_dev))
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return -EINVAL;
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nsim_dev->vfconfigs[vf].min_tx_rate = min;
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nsim_dev->vfconfigs[vf].max_tx_rate = max;
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return 0;
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}
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static int nsim_set_vf_spoofchk(struct net_device *dev, int vf, bool val)
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{
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struct netdevsim *ns = netdev_priv(dev);
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struct nsim_dev *nsim_dev = ns->nsim_dev;
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if (vf >= nsim_dev_get_vfs(nsim_dev))
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return -EINVAL;
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nsim_dev->vfconfigs[vf].spoofchk_enabled = val;
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return 0;
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}
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static int nsim_set_vf_rss_query_en(struct net_device *dev, int vf, bool val)
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{
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struct netdevsim *ns = netdev_priv(dev);
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struct nsim_dev *nsim_dev = ns->nsim_dev;
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if (vf >= nsim_dev_get_vfs(nsim_dev))
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return -EINVAL;
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nsim_dev->vfconfigs[vf].rss_query_enabled = val;
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return 0;
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}
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static int nsim_set_vf_trust(struct net_device *dev, int vf, bool val)
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{
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struct netdevsim *ns = netdev_priv(dev);
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struct nsim_dev *nsim_dev = ns->nsim_dev;
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if (vf >= nsim_dev_get_vfs(nsim_dev))
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return -EINVAL;
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nsim_dev->vfconfigs[vf].trusted = val;
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return 0;
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}
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static int
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nsim_get_vf_config(struct net_device *dev, int vf, struct ifla_vf_info *ivi)
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{
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struct netdevsim *ns = netdev_priv(dev);
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struct nsim_dev *nsim_dev = ns->nsim_dev;
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if (vf >= nsim_dev_get_vfs(nsim_dev))
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return -EINVAL;
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ivi->vf = vf;
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ivi->linkstate = nsim_dev->vfconfigs[vf].link_state;
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ivi->min_tx_rate = nsim_dev->vfconfigs[vf].min_tx_rate;
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ivi->max_tx_rate = nsim_dev->vfconfigs[vf].max_tx_rate;
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ivi->vlan = nsim_dev->vfconfigs[vf].vlan;
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ivi->vlan_proto = nsim_dev->vfconfigs[vf].vlan_proto;
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ivi->qos = nsim_dev->vfconfigs[vf].qos;
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memcpy(&ivi->mac, nsim_dev->vfconfigs[vf].vf_mac, ETH_ALEN);
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ivi->spoofchk = nsim_dev->vfconfigs[vf].spoofchk_enabled;
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ivi->trusted = nsim_dev->vfconfigs[vf].trusted;
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ivi->rss_query_en = nsim_dev->vfconfigs[vf].rss_query_enabled;
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return 0;
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}
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static int nsim_set_vf_link_state(struct net_device *dev, int vf, int state)
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{
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struct netdevsim *ns = netdev_priv(dev);
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struct nsim_dev *nsim_dev = ns->nsim_dev;
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if (vf >= nsim_dev_get_vfs(nsim_dev))
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return -EINVAL;
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switch (state) {
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case IFLA_VF_LINK_STATE_AUTO:
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case IFLA_VF_LINK_STATE_ENABLE:
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case IFLA_VF_LINK_STATE_DISABLE:
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break;
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default:
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return -EINVAL;
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}
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nsim_dev->vfconfigs[vf].link_state = state;
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return 0;
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}
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static LIST_HEAD(nsim_block_cb_list);
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static int
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nsim_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data)
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{
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struct netdevsim *ns = netdev_priv(dev);
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switch (type) {
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case TC_SETUP_BLOCK:
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return flow_block_cb_setup_simple(type_data,
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&nsim_block_cb_list,
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nsim_setup_tc_block_cb,
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ns, ns, true);
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default:
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return -EOPNOTSUPP;
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}
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}
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static int
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nsim_set_features(struct net_device *dev, netdev_features_t features)
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{
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struct netdevsim *ns = netdev_priv(dev);
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if ((dev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC))
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return nsim_bpf_disable_tc(ns);
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return 0;
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}
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static struct devlink_port *nsim_get_devlink_port(struct net_device *dev)
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{
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struct netdevsim *ns = netdev_priv(dev);
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return &ns->nsim_dev_port->devlink_port;
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}
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static const struct net_device_ops nsim_netdev_ops = {
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.ndo_start_xmit = nsim_start_xmit,
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.ndo_set_rx_mode = nsim_set_rx_mode,
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.ndo_set_mac_address = eth_mac_addr,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_change_mtu = nsim_change_mtu,
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.ndo_get_stats64 = nsim_get_stats64,
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.ndo_set_vf_mac = nsim_set_vf_mac,
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.ndo_set_vf_vlan = nsim_set_vf_vlan,
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.ndo_set_vf_rate = nsim_set_vf_rate,
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.ndo_set_vf_spoofchk = nsim_set_vf_spoofchk,
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.ndo_set_vf_trust = nsim_set_vf_trust,
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.ndo_get_vf_config = nsim_get_vf_config,
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.ndo_set_vf_link_state = nsim_set_vf_link_state,
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.ndo_set_vf_rss_query_en = nsim_set_vf_rss_query_en,
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.ndo_setup_tc = nsim_setup_tc,
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.ndo_set_features = nsim_set_features,
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.ndo_bpf = nsim_bpf,
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.ndo_get_devlink_port = nsim_get_devlink_port,
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};
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static const struct net_device_ops nsim_vf_netdev_ops = {
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.ndo_start_xmit = nsim_start_xmit,
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.ndo_set_rx_mode = nsim_set_rx_mode,
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.ndo_set_mac_address = eth_mac_addr,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_change_mtu = nsim_change_mtu,
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.ndo_get_stats64 = nsim_get_stats64,
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.ndo_setup_tc = nsim_setup_tc,
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.ndo_set_features = nsim_set_features,
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.ndo_get_devlink_port = nsim_get_devlink_port,
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};
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static void nsim_setup(struct net_device *dev)
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{
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ether_setup(dev);
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eth_hw_addr_random(dev);
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dev->tx_queue_len = 0;
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dev->flags |= IFF_NOARP;
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dev->flags &= ~IFF_MULTICAST;
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dev->priv_flags |= IFF_LIVE_ADDR_CHANGE |
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IFF_NO_QUEUE;
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dev->features |= NETIF_F_HIGHDMA |
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NETIF_F_SG |
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NETIF_F_FRAGLIST |
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NETIF_F_HW_CSUM |
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NETIF_F_TSO;
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dev->hw_features |= NETIF_F_HW_TC;
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dev->max_mtu = ETH_MAX_MTU;
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}
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static int nsim_init_netdevsim(struct netdevsim *ns)
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{
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int err;
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ns->netdev->netdev_ops = &nsim_netdev_ops;
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err = nsim_udp_tunnels_info_create(ns->nsim_dev, ns->netdev);
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if (err)
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return err;
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rtnl_lock();
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err = nsim_bpf_init(ns);
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if (err)
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goto err_utn_destroy;
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nsim_ipsec_init(ns);
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err = register_netdevice(ns->netdev);
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if (err)
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goto err_ipsec_teardown;
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rtnl_unlock();
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return 0;
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err_ipsec_teardown:
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nsim_ipsec_teardown(ns);
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nsim_bpf_uninit(ns);
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err_utn_destroy:
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rtnl_unlock();
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nsim_udp_tunnels_info_destroy(ns->netdev);
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return err;
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}
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static int nsim_init_netdevsim_vf(struct netdevsim *ns)
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{
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int err;
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ns->netdev->netdev_ops = &nsim_vf_netdev_ops;
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rtnl_lock();
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err = register_netdevice(ns->netdev);
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rtnl_unlock();
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return err;
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}
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struct netdevsim *
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nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port)
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{
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struct net_device *dev;
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struct netdevsim *ns;
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int err;
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dev = alloc_netdev_mq(sizeof(*ns), "eth%d", NET_NAME_UNKNOWN, nsim_setup,
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nsim_dev->nsim_bus_dev->num_queues);
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if (!dev)
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return ERR_PTR(-ENOMEM);
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dev_net_set(dev, nsim_dev_net(nsim_dev));
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ns = netdev_priv(dev);
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ns->netdev = dev;
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u64_stats_init(&ns->syncp);
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ns->nsim_dev = nsim_dev;
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ns->nsim_dev_port = nsim_dev_port;
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ns->nsim_bus_dev = nsim_dev->nsim_bus_dev;
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SET_NETDEV_DEV(dev, &ns->nsim_bus_dev->dev);
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nsim_ethtool_init(ns);
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if (nsim_dev_port_is_pf(nsim_dev_port))
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err = nsim_init_netdevsim(ns);
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else
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err = nsim_init_netdevsim_vf(ns);
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if (err)
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goto err_free_netdev;
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return ns;
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err_free_netdev:
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free_netdev(dev);
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return ERR_PTR(err);
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}
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void nsim_destroy(struct netdevsim *ns)
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{
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struct net_device *dev = ns->netdev;
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rtnl_lock();
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unregister_netdevice(dev);
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if (nsim_dev_port_is_pf(ns->nsim_dev_port)) {
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nsim_ipsec_teardown(ns);
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nsim_bpf_uninit(ns);
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}
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rtnl_unlock();
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if (nsim_dev_port_is_pf(ns->nsim_dev_port))
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nsim_udp_tunnels_info_destroy(dev);
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free_netdev(dev);
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}
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static int nsim_validate(struct nlattr *tb[], struct nlattr *data[],
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struct netlink_ext_ack *extack)
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{
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NL_SET_ERR_MSG_MOD(extack,
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"Please use: echo \"[ID] [PORT_COUNT] [NUM_QUEUES]\" > /sys/bus/netdevsim/new_device");
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return -EOPNOTSUPP;
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}
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static struct rtnl_link_ops nsim_link_ops __read_mostly = {
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.kind = DRV_NAME,
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.validate = nsim_validate,
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};
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static int __init nsim_module_init(void)
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{
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int err;
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err = nsim_dev_init();
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if (err)
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return err;
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err = nsim_bus_init();
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if (err)
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goto err_dev_exit;
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err = rtnl_link_register(&nsim_link_ops);
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if (err)
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goto err_bus_exit;
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return 0;
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err_bus_exit:
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nsim_bus_exit();
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err_dev_exit:
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nsim_dev_exit();
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return err;
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}
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static void __exit nsim_module_exit(void)
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{
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rtnl_link_unregister(&nsim_link_ops);
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nsim_bus_exit();
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nsim_dev_exit();
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}
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module_init(nsim_module_init);
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module_exit(nsim_module_exit);
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_RTNL_LINK(DRV_NAME);
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