446 lines
11 KiB
C
446 lines
11 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 "netdevsim.h"
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static struct dentry *nsim_ddir;
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static int nsim_get_port_parent_id(struct net_device *dev,
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struct netdev_phys_item_id *ppid)
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{
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struct netdevsim *ns = netdev_priv(dev);
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ppid->id_len = sizeof(ns->nsim_dev->nsim_bus_dev->dev.id);
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memcpy(&ppid->id, &ns->nsim_dev->nsim_bus_dev->dev.id, ppid->id_len);
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return 0;
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}
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static int nsim_init(struct net_device *dev)
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{
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struct netdevsim *ns = netdev_priv(dev);
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char dev_link_name[32];
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int err;
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ns->ddir = debugfs_create_dir(netdev_name(dev), nsim_ddir);
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if (IS_ERR_OR_NULL(ns->ddir))
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return -ENOMEM;
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sprintf(dev_link_name, "../../" DRV_NAME "_dev/%u",
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ns->nsim_dev->nsim_bus_dev->dev.id);
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debugfs_create_symlink("dev", ns->ddir, dev_link_name);
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err = nsim_bpf_init(ns);
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if (err)
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goto err_debugfs_destroy;
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nsim_ipsec_init(ns);
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return 0;
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err_debugfs_destroy:
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debugfs_remove_recursive(ns->ddir);
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return err;
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}
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static void nsim_uninit(struct net_device *dev)
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{
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struct netdevsim *ns = netdev_priv(dev);
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nsim_ipsec_teardown(ns);
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debugfs_remove_recursive(ns->ddir);
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nsim_bpf_uninit(ns);
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}
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static void nsim_free(struct net_device *dev)
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{
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struct netdevsim *ns = netdev_priv(dev);
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nsim_dev_destroy(ns->nsim_dev);
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nsim_bus_dev_del(ns->nsim_bus_dev);
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/* netdev and vf state will be freed out of device_release() */
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}
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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(&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(&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
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nsim_setup_tc_block(struct net_device *dev, struct tc_block_offload *f)
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{
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struct netdevsim *ns = netdev_priv(dev);
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if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
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return -EOPNOTSUPP;
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switch (f->command) {
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case TC_BLOCK_BIND:
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return tcf_block_cb_register(f->block, nsim_setup_tc_block_cb,
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ns, ns, f->extack);
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case TC_BLOCK_UNBIND:
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tcf_block_cb_unregister(f->block, nsim_setup_tc_block_cb, ns);
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return 0;
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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 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_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
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/* Only refuse multicast addresses, zero address can mean unset/any. */
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if (vf >= nsim_bus_dev->num_vfs || is_multicast_ether_addr(mac))
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return -EINVAL;
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memcpy(nsim_bus_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_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
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if (vf >= nsim_bus_dev->num_vfs || vlan > 4095 || qos > 7)
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return -EINVAL;
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nsim_bus_dev->vfconfigs[vf].vlan = vlan;
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nsim_bus_dev->vfconfigs[vf].qos = qos;
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nsim_bus_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_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
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if (vf >= nsim_bus_dev->num_vfs)
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return -EINVAL;
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nsim_bus_dev->vfconfigs[vf].min_tx_rate = min;
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nsim_bus_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_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
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if (vf >= nsim_bus_dev->num_vfs)
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return -EINVAL;
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nsim_bus_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_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
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if (vf >= nsim_bus_dev->num_vfs)
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return -EINVAL;
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nsim_bus_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_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
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if (vf >= nsim_bus_dev->num_vfs)
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return -EINVAL;
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nsim_bus_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_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
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if (vf >= nsim_bus_dev->num_vfs)
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return -EINVAL;
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ivi->vf = vf;
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ivi->linkstate = nsim_bus_dev->vfconfigs[vf].link_state;
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ivi->min_tx_rate = nsim_bus_dev->vfconfigs[vf].min_tx_rate;
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ivi->max_tx_rate = nsim_bus_dev->vfconfigs[vf].max_tx_rate;
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ivi->vlan = nsim_bus_dev->vfconfigs[vf].vlan;
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ivi->vlan_proto = nsim_bus_dev->vfconfigs[vf].vlan_proto;
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ivi->qos = nsim_bus_dev->vfconfigs[vf].qos;
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memcpy(&ivi->mac, nsim_bus_dev->vfconfigs[vf].vf_mac, ETH_ALEN);
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ivi->spoofchk = nsim_bus_dev->vfconfigs[vf].spoofchk_enabled;
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ivi->trusted = nsim_bus_dev->vfconfigs[vf].trusted;
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ivi->rss_query_en = nsim_bus_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_bus_dev *nsim_bus_dev = ns->nsim_bus_dev;
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if (vf >= nsim_bus_dev->num_vfs)
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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_bus_dev->vfconfigs[vf].link_state = state;
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return 0;
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}
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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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switch (type) {
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case TC_SETUP_BLOCK:
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return nsim_setup_tc_block(dev, type_data);
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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 const struct net_device_ops nsim_netdev_ops = {
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.ndo_init = nsim_init,
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.ndo_uninit = nsim_uninit,
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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_port_parent_id = nsim_get_port_parent_id,
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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->netdev_ops = &nsim_netdev_ops;
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dev->needs_free_netdev = true;
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dev->priv_destructor = nsim_free;
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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_validate(struct nlattr *tb[], struct nlattr *data[],
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struct netlink_ext_ack *extack)
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{
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if (tb[IFLA_ADDRESS]) {
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if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
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return -EINVAL;
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if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
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return -EADDRNOTAVAIL;
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}
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return 0;
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}
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static int nsim_newlink(struct net *src_net, struct net_device *dev,
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struct nlattr *tb[], struct nlattr *data[],
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struct netlink_ext_ack *extack)
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{
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struct netdevsim *ns = netdev_priv(dev);
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int err;
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ns->nsim_bus_dev = nsim_bus_dev_new(~0, 0);
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if (IS_ERR(ns->nsim_bus_dev))
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return PTR_ERR(ns->nsim_bus_dev);
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SET_NETDEV_DEV(dev, &ns->nsim_bus_dev->dev);
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ns->netdev = dev;
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ns->nsim_dev = nsim_dev_create_with_ns(ns->nsim_bus_dev, ns);
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if (IS_ERR(ns->nsim_dev)) {
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err = PTR_ERR(ns->nsim_dev);
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goto err_dev_del;
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}
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err = register_netdevice(dev);
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if (err)
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goto err_dev_destroy;
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return 0;
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err_dev_destroy:
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nsim_dev_destroy(ns->nsim_dev);
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err_dev_del:
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nsim_bus_dev_del(ns->nsim_bus_dev);
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return err;
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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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.priv_size = sizeof(struct netdevsim),
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.setup = nsim_setup,
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.validate = nsim_validate,
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.newlink = nsim_newlink,
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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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nsim_ddir = debugfs_create_dir(DRV_NAME, NULL);
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if (IS_ERR_OR_NULL(nsim_ddir))
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return -ENOMEM;
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err = nsim_dev_init();
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if (err)
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goto err_debugfs_destroy;
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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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err_debugfs_destroy:
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debugfs_remove_recursive(nsim_ddir);
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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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debugfs_remove_recursive(nsim_ddir);
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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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