| /* |
| * GENEVE: Generic Network Virtualization Encapsulation |
| * |
| * Copyright (c) 2015 Red Hat, Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/hash.h> |
| #include <net/dst_metadata.h> |
| #include <net/rtnetlink.h> |
| #include <net/geneve.h> |
| |
| #define GENEVE_NETDEV_VER "0.6" |
| |
| #define GENEVE_UDP_PORT 6081 |
| |
| #define GENEVE_N_VID (1u << 24) |
| #define GENEVE_VID_MASK (GENEVE_N_VID - 1) |
| |
| #define VNI_HASH_BITS 10 |
| #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) |
| |
| static bool log_ecn_error = true; |
| module_param(log_ecn_error, bool, 0644); |
| MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); |
| |
| /* per-network namespace private data for this module */ |
| struct geneve_net { |
| struct list_head geneve_list; |
| struct hlist_head vni_list[VNI_HASH_SIZE]; |
| struct geneve_dev __rcu *collect_md_tun; |
| }; |
| |
| /* Pseudo network device */ |
| struct geneve_dev { |
| struct hlist_node hlist; /* vni hash table */ |
| struct net *net; /* netns for packet i/o */ |
| struct net_device *dev; /* netdev for geneve tunnel */ |
| struct geneve_sock *sock; /* socket used for geneve tunnel */ |
| u8 vni[3]; /* virtual network ID for tunnel */ |
| u8 ttl; /* TTL override */ |
| u8 tos; /* TOS override */ |
| struct sockaddr_in remote; /* IPv4 address for link partner */ |
| struct list_head next; /* geneve's per namespace list */ |
| __be16 dst_port; |
| bool collect_md; |
| }; |
| |
| static int geneve_net_id; |
| |
| static inline __u32 geneve_net_vni_hash(u8 vni[3]) |
| { |
| __u32 vnid; |
| |
| vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; |
| return hash_32(vnid, VNI_HASH_BITS); |
| } |
| |
| static __be64 vni_to_tunnel_id(const __u8 *vni) |
| { |
| #ifdef __BIG_ENDIAN |
| return (vni[0] << 16) | (vni[1] << 8) | vni[2]; |
| #else |
| return (__force __be64)(((__force u64)vni[0] << 40) | |
| ((__force u64)vni[1] << 48) | |
| ((__force u64)vni[2] << 56)); |
| #endif |
| } |
| |
| static struct geneve_dev *geneve_lookup(struct geneve_net *gn, |
| struct geneve_sock *gs, |
| struct iphdr *iph, |
| struct genevehdr *gnvh) |
| { |
| struct inet_sock *sk = inet_sk(gs->sock->sk); |
| struct hlist_head *vni_list_head; |
| struct geneve_dev *geneve; |
| __u32 hash; |
| |
| geneve = rcu_dereference(gn->collect_md_tun); |
| if (geneve) |
| return geneve; |
| |
| /* Find the device for this VNI */ |
| hash = geneve_net_vni_hash(gnvh->vni); |
| vni_list_head = &gn->vni_list[hash]; |
| hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { |
| if (!memcmp(gnvh->vni, geneve->vni, sizeof(geneve->vni)) && |
| iph->saddr == geneve->remote.sin_addr.s_addr && |
| sk->inet_sport == geneve->dst_port) { |
| return geneve; |
| } |
| } |
| return NULL; |
| } |
| |
| /* geneve receive/decap routine */ |
| static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb) |
| { |
| struct genevehdr *gnvh = geneve_hdr(skb); |
| struct metadata_dst *tun_dst = NULL; |
| struct geneve_dev *geneve = NULL; |
| struct pcpu_sw_netstats *stats; |
| struct geneve_net *gn; |
| struct iphdr *iph; |
| int err; |
| |
| iph = ip_hdr(skb); /* Still outer IP header... */ |
| gn = gs->rcv_data; |
| geneve = geneve_lookup(gn, gs, iph, gnvh); |
| if (!geneve) |
| goto drop; |
| |
| if (ip_tunnel_collect_metadata() || geneve->collect_md) { |
| __be16 flags; |
| void *opts; |
| |
| flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | |
| (gnvh->oam ? TUNNEL_OAM : 0) | |
| (gnvh->critical ? TUNNEL_CRIT_OPT : 0); |
| |
| tun_dst = udp_tun_rx_dst(skb, AF_INET, flags, |
| vni_to_tunnel_id(gnvh->vni), |
| gnvh->opt_len * 4); |
| if (!tun_dst) |
| goto drop; |
| |
| /* Update tunnel dst according to Geneve options. */ |
| opts = ip_tunnel_info_opts(&tun_dst->u.tun_info, |
| gnvh->opt_len * 4); |
| memcpy(opts, gnvh->options, gnvh->opt_len * 4); |
| } else { |
| /* Drop packets w/ critical options, |
| * since we don't support any... |
| */ |
| if (gnvh->critical) |
| goto drop; |
| } |
| |
| skb_reset_mac_header(skb); |
| skb_scrub_packet(skb, !net_eq(geneve->net, dev_net(geneve->dev))); |
| skb->protocol = eth_type_trans(skb, geneve->dev); |
| skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
| |
| if (tun_dst) |
| skb_dst_set(skb, &tun_dst->dst); |
| |
| /* Ignore packet loops (and multicast echo) */ |
| if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) |
| goto drop; |
| |
| skb_reset_network_header(skb); |
| |
| iph = ip_hdr(skb); /* Now inner IP header... */ |
| err = IP_ECN_decapsulate(iph, skb); |
| |
| if (unlikely(err)) { |
| if (log_ecn_error) |
| net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", |
| &iph->saddr, iph->tos); |
| if (err > 1) { |
| ++geneve->dev->stats.rx_frame_errors; |
| ++geneve->dev->stats.rx_errors; |
| goto drop; |
| } |
| } |
| |
| stats = this_cpu_ptr(geneve->dev->tstats); |
| u64_stats_update_begin(&stats->syncp); |
| stats->rx_packets++; |
| stats->rx_bytes += skb->len; |
| u64_stats_update_end(&stats->syncp); |
| |
| netif_rx(skb); |
| return; |
| drop: |
| /* Consume bad packet */ |
| kfree_skb(skb); |
| } |
| |
| /* Setup stats when device is created */ |
| static int geneve_init(struct net_device *dev) |
| { |
| dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
| if (!dev->tstats) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| static void geneve_uninit(struct net_device *dev) |
| { |
| free_percpu(dev->tstats); |
| } |
| |
| static int geneve_open(struct net_device *dev) |
| { |
| struct geneve_dev *geneve = netdev_priv(dev); |
| struct net *net = geneve->net; |
| struct geneve_net *gn = net_generic(geneve->net, geneve_net_id); |
| struct geneve_sock *gs; |
| |
| gs = geneve_sock_add(net, geneve->dst_port, geneve_rx, gn, |
| false, false); |
| if (IS_ERR(gs)) |
| return PTR_ERR(gs); |
| |
| geneve->sock = gs; |
| |
| return 0; |
| } |
| |
| static int geneve_stop(struct net_device *dev) |
| { |
| struct geneve_dev *geneve = netdev_priv(dev); |
| struct geneve_sock *gs = geneve->sock; |
| |
| geneve_sock_release(gs); |
| |
| return 0; |
| } |
| |
| static struct rtable *geneve_get_rt(struct sk_buff *skb, |
| struct net_device *dev, |
| struct flowi4 *fl4, |
| struct ip_tunnel_info *info) |
| { |
| struct geneve_dev *geneve = netdev_priv(dev); |
| struct rtable *rt = NULL; |
| __u8 tos; |
| |
| memset(fl4, 0, sizeof(*fl4)); |
| fl4->flowi4_mark = skb->mark; |
| fl4->flowi4_proto = IPPROTO_UDP; |
| |
| if (info) { |
| fl4->daddr = info->key.u.ipv4.dst; |
| fl4->saddr = info->key.u.ipv4.src; |
| fl4->flowi4_tos = RT_TOS(info->key.tos); |
| } else { |
| tos = geneve->tos; |
| if (tos == 1) { |
| const struct iphdr *iip = ip_hdr(skb); |
| |
| tos = ip_tunnel_get_dsfield(iip, skb); |
| } |
| |
| fl4->flowi4_tos = RT_TOS(tos); |
| fl4->daddr = geneve->remote.sin_addr.s_addr; |
| } |
| |
| rt = ip_route_output_key(geneve->net, fl4); |
| if (IS_ERR(rt)) { |
| netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); |
| dev->stats.tx_carrier_errors++; |
| return rt; |
| } |
| if (rt->dst.dev == dev) { /* is this necessary? */ |
| netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); |
| dev->stats.collisions++; |
| ip_rt_put(rt); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| return rt; |
| } |
| |
| /* Convert 64 bit tunnel ID to 24 bit VNI. */ |
| static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) |
| { |
| #ifdef __BIG_ENDIAN |
| vni[0] = (__force __u8)(tun_id >> 16); |
| vni[1] = (__force __u8)(tun_id >> 8); |
| vni[2] = (__force __u8)tun_id; |
| #else |
| vni[0] = (__force __u8)((__force u64)tun_id >> 40); |
| vni[1] = (__force __u8)((__force u64)tun_id >> 48); |
| vni[2] = (__force __u8)((__force u64)tun_id >> 56); |
| #endif |
| } |
| |
| static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct geneve_dev *geneve = netdev_priv(dev); |
| struct geneve_sock *gs = geneve->sock; |
| struct ip_tunnel_info *info = NULL; |
| struct rtable *rt = NULL; |
| const struct iphdr *iip; /* interior IP header */ |
| struct flowi4 fl4; |
| __u8 tos, ttl; |
| __be16 sport; |
| bool xnet; |
| int err; |
| |
| sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); |
| |
| if (geneve->collect_md) { |
| info = skb_tunnel_info(skb); |
| if (unlikely(info && info->mode != IP_TUNNEL_INFO_TX)) { |
| netdev_dbg(dev, "no tunnel metadata\n"); |
| goto tx_error; |
| } |
| } |
| |
| rt = geneve_get_rt(skb, dev, &fl4, info); |
| if (IS_ERR(rt)) { |
| netdev_dbg(dev, "no route to %pI4\n", &fl4.daddr); |
| dev->stats.tx_carrier_errors++; |
| goto tx_error; |
| } |
| skb_reset_mac_header(skb); |
| xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
| |
| if (info) { |
| const struct ip_tunnel_key *key = &info->key; |
| bool udp_csum; |
| u8 *opts = NULL; |
| u8 vni[3]; |
| __be16 df; |
| |
| tunnel_id_to_vni(key->tun_id, vni); |
| df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; |
| udp_csum = !!(key->tun_flags & TUNNEL_CSUM); |
| |
| if (key->tun_flags & TUNNEL_GENEVE_OPT) |
| opts = ip_tunnel_info_opts(info, info->options_len); |
| |
| err = geneve_xmit_skb(gs, rt, skb, fl4.saddr, fl4.daddr, |
| key->tos, key->ttl, df, |
| sport, geneve->dst_port, |
| key->tun_flags, vni, |
| info->options_len, opts, udp_csum, xnet); |
| } else { |
| iip = ip_hdr(skb); |
| tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb); |
| |
| ttl = geneve->ttl; |
| if (!ttl && IN_MULTICAST(ntohl(fl4.daddr))) |
| ttl = 1; |
| |
| ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); |
| |
| /* no need to handle local destination and encap bypass...yet... */ |
| err = geneve_xmit_skb(gs, rt, skb, fl4.saddr, fl4.daddr, tos, |
| ttl, 0, sport, geneve->dst_port, 0, |
| geneve->vni, 0, NULL, false, xnet); |
| } |
| if (err < 0) |
| ip_rt_put(rt); |
| |
| iptunnel_xmit_stats(err, &dev->stats, dev->tstats); |
| return NETDEV_TX_OK; |
| |
| tx_error: |
| dev->stats.tx_errors++; |
| dev_kfree_skb(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| static const struct net_device_ops geneve_netdev_ops = { |
| .ndo_init = geneve_init, |
| .ndo_uninit = geneve_uninit, |
| .ndo_open = geneve_open, |
| .ndo_stop = geneve_stop, |
| .ndo_start_xmit = geneve_xmit, |
| .ndo_get_stats64 = ip_tunnel_get_stats64, |
| .ndo_change_mtu = eth_change_mtu, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_set_mac_address = eth_mac_addr, |
| }; |
| |
| static void geneve_get_drvinfo(struct net_device *dev, |
| struct ethtool_drvinfo *drvinfo) |
| { |
| strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); |
| strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); |
| } |
| |
| static const struct ethtool_ops geneve_ethtool_ops = { |
| .get_drvinfo = geneve_get_drvinfo, |
| .get_link = ethtool_op_get_link, |
| }; |
| |
| /* Info for udev, that this is a virtual tunnel endpoint */ |
| static struct device_type geneve_type = { |
| .name = "geneve", |
| }; |
| |
| /* Initialize the device structure. */ |
| static void geneve_setup(struct net_device *dev) |
| { |
| ether_setup(dev); |
| |
| dev->netdev_ops = &geneve_netdev_ops; |
| dev->ethtool_ops = &geneve_ethtool_ops; |
| dev->destructor = free_netdev; |
| |
| SET_NETDEV_DEVTYPE(dev, &geneve_type); |
| |
| dev->features |= NETIF_F_LLTX; |
| dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
| dev->features |= NETIF_F_RXCSUM; |
| dev->features |= NETIF_F_GSO_SOFTWARE; |
| |
| dev->vlan_features = dev->features; |
| dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
| |
| dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
| dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
| dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
| |
| netif_keep_dst(dev); |
| dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
| eth_hw_addr_random(dev); |
| } |
| |
| static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { |
| [IFLA_GENEVE_ID] = { .type = NLA_U32 }, |
| [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
| [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
| [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
| [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
| [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
| }; |
| |
| static int geneve_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 (!data) |
| return -EINVAL; |
| |
| if (data[IFLA_GENEVE_ID]) { |
| __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); |
| |
| if (vni >= GENEVE_VID_MASK) |
| return -ERANGE; |
| } |
| |
| return 0; |
| } |
| |
| static int geneve_configure(struct net *net, struct net_device *dev, |
| __be32 rem_addr, __u32 vni, __u8 ttl, __u8 tos, |
| __u16 dst_port, bool metadata) |
| { |
| struct geneve_net *gn = net_generic(net, geneve_net_id); |
| struct geneve_dev *dummy, *geneve = netdev_priv(dev); |
| struct hlist_head *vni_list_head; |
| struct sockaddr_in remote; /* IPv4 address for link partner */ |
| __u32 hash; |
| int err; |
| |
| if (metadata) { |
| if (rtnl_dereference(gn->collect_md_tun)) |
| return -EEXIST; |
| if (!list_empty(&gn->geneve_list)) |
| return -EPERM; |
| } else { |
| if (rtnl_dereference(gn->collect_md_tun)) |
| return -EPERM; |
| } |
| |
| geneve->net = net; |
| geneve->dev = dev; |
| |
| geneve->vni[0] = (vni & 0x00ff0000) >> 16; |
| geneve->vni[1] = (vni & 0x0000ff00) >> 8; |
| geneve->vni[2] = vni & 0x000000ff; |
| |
| geneve->remote.sin_addr.s_addr = rem_addr; |
| if (IN_MULTICAST(ntohl(geneve->remote.sin_addr.s_addr))) |
| return -EINVAL; |
| |
| remote = geneve->remote; |
| if (metadata) { |
| if (rem_addr || vni || tos || ttl) |
| return -EINVAL; |
| } |
| |
| hash = geneve_net_vni_hash(geneve->vni); |
| vni_list_head = &gn->vni_list[hash]; |
| hlist_for_each_entry_rcu(dummy, vni_list_head, hlist) { |
| if (!memcmp(geneve->vni, dummy->vni, sizeof(dummy->vni)) && |
| !memcmp(&remote, &dummy->remote, sizeof(dummy->remote)) && |
| htons(dst_port) == dummy->dst_port) { |
| return -EBUSY; |
| } |
| } |
| |
| geneve->ttl = ttl; |
| geneve->tos = tos; |
| geneve->dst_port = htons(dst_port); |
| geneve->collect_md = metadata; |
| |
| err = register_netdevice(dev); |
| if (err) |
| return err; |
| |
| list_add(&geneve->next, &gn->geneve_list); |
| hlist_add_head_rcu(&geneve->hlist, &gn->vni_list[hash]); |
| |
| if (geneve->collect_md) |
| rcu_assign_pointer(gn->collect_md_tun, geneve); |
| return 0; |
| } |
| |
| static int geneve_newlink(struct net *net, struct net_device *dev, |
| struct nlattr *tb[], struct nlattr *data[]) |
| { |
| __u16 dst_port = GENEVE_UDP_PORT; |
| __u8 ttl = 0, tos = 0; |
| bool metadata = false; |
| __be32 rem_addr; |
| __u32 vni; |
| |
| if (!data[IFLA_GENEVE_ID] || !data[IFLA_GENEVE_REMOTE]) |
| return -EINVAL; |
| |
| vni = nla_get_u32(data[IFLA_GENEVE_ID]); |
| rem_addr = nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); |
| |
| if (data[IFLA_GENEVE_TTL]) |
| ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
| |
| if (data[IFLA_GENEVE_TOS]) |
| tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
| |
| if (data[IFLA_GENEVE_PORT]) |
| dst_port = nla_get_u16(data[IFLA_GENEVE_PORT]); |
| |
| if (data[IFLA_GENEVE_COLLECT_METADATA]) |
| metadata = true; |
| |
| return geneve_configure(net, dev, rem_addr, vni, |
| ttl, tos, dst_port, metadata); |
| } |
| |
| static void geneve_dellink(struct net_device *dev, struct list_head *head) |
| { |
| struct geneve_dev *geneve = netdev_priv(dev); |
| |
| if (geneve->collect_md) { |
| struct geneve_net *gn = net_generic(geneve->net, geneve_net_id); |
| |
| rcu_assign_pointer(gn->collect_md_tun, NULL); |
| } |
| |
| if (!hlist_unhashed(&geneve->hlist)) |
| hlist_del_rcu(&geneve->hlist); |
| |
| list_del(&geneve->next); |
| unregister_netdevice_queue(dev, head); |
| } |
| |
| static size_t geneve_get_size(const struct net_device *dev) |
| { |
| return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ |
| nla_total_size(sizeof(struct in_addr)) + /* IFLA_GENEVE_REMOTE */ |
| nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
| nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
| nla_total_size(sizeof(__u16)) + /* IFLA_GENEVE_PORT */ |
| nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
| 0; |
| } |
| |
| static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) |
| { |
| struct geneve_dev *geneve = netdev_priv(dev); |
| __u32 vni; |
| |
| vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2]; |
| if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) |
| goto nla_put_failure; |
| |
| if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, |
| geneve->remote.sin_addr.s_addr)) |
| goto nla_put_failure; |
| |
| if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) || |
| nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos)) |
| goto nla_put_failure; |
| |
| if (nla_put_u16(skb, IFLA_GENEVE_PORT, ntohs(geneve->dst_port))) |
| goto nla_put_failure; |
| |
| if (geneve->collect_md) { |
| if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) |
| goto nla_put_failure; |
| } |
| |
| return 0; |
| |
| nla_put_failure: |
| return -EMSGSIZE; |
| } |
| |
| static struct rtnl_link_ops geneve_link_ops __read_mostly = { |
| .kind = "geneve", |
| .maxtype = IFLA_GENEVE_MAX, |
| .policy = geneve_policy, |
| .priv_size = sizeof(struct geneve_dev), |
| .setup = geneve_setup, |
| .validate = geneve_validate, |
| .newlink = geneve_newlink, |
| .dellink = geneve_dellink, |
| .get_size = geneve_get_size, |
| .fill_info = geneve_fill_info, |
| }; |
| |
| struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
| u8 name_assign_type, u16 dst_port) |
| { |
| struct nlattr *tb[IFLA_MAX + 1]; |
| struct net_device *dev; |
| int err; |
| |
| memset(tb, 0, sizeof(tb)); |
| dev = rtnl_create_link(net, name, name_assign_type, |
| &geneve_link_ops, tb); |
| if (IS_ERR(dev)) |
| return dev; |
| |
| err = geneve_configure(net, dev, 0, 0, 0, 0, dst_port, true); |
| if (err) { |
| free_netdev(dev); |
| return ERR_PTR(err); |
| } |
| return dev; |
| } |
| EXPORT_SYMBOL_GPL(geneve_dev_create_fb); |
| |
| static __net_init int geneve_init_net(struct net *net) |
| { |
| struct geneve_net *gn = net_generic(net, geneve_net_id); |
| unsigned int h; |
| |
| INIT_LIST_HEAD(&gn->geneve_list); |
| |
| for (h = 0; h < VNI_HASH_SIZE; ++h) |
| INIT_HLIST_HEAD(&gn->vni_list[h]); |
| |
| return 0; |
| } |
| |
| static void __net_exit geneve_exit_net(struct net *net) |
| { |
| struct geneve_net *gn = net_generic(net, geneve_net_id); |
| struct geneve_dev *geneve, *next; |
| struct net_device *dev, *aux; |
| LIST_HEAD(list); |
| |
| rtnl_lock(); |
| |
| /* gather any geneve devices that were moved into this ns */ |
| for_each_netdev_safe(net, dev, aux) |
| if (dev->rtnl_link_ops == &geneve_link_ops) |
| unregister_netdevice_queue(dev, &list); |
| |
| /* now gather any other geneve devices that were created in this ns */ |
| list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { |
| /* If geneve->dev is in the same netns, it was already added |
| * to the list by the previous loop. |
| */ |
| if (!net_eq(dev_net(geneve->dev), net)) |
| unregister_netdevice_queue(geneve->dev, &list); |
| } |
| |
| /* unregister the devices gathered above */ |
| unregister_netdevice_many(&list); |
| rtnl_unlock(); |
| } |
| |
| static struct pernet_operations geneve_net_ops = { |
| .init = geneve_init_net, |
| .exit = geneve_exit_net, |
| .id = &geneve_net_id, |
| .size = sizeof(struct geneve_net), |
| }; |
| |
| static int __init geneve_init_module(void) |
| { |
| int rc; |
| |
| rc = register_pernet_subsys(&geneve_net_ops); |
| if (rc) |
| goto out1; |
| |
| rc = rtnl_link_register(&geneve_link_ops); |
| if (rc) |
| goto out2; |
| |
| return 0; |
| out2: |
| unregister_pernet_subsys(&geneve_net_ops); |
| out1: |
| return rc; |
| } |
| late_initcall(geneve_init_module); |
| |
| static void __exit geneve_cleanup_module(void) |
| { |
| rtnl_link_unregister(&geneve_link_ops); |
| unregister_pernet_subsys(&geneve_net_ops); |
| } |
| module_exit(geneve_cleanup_module); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(GENEVE_NETDEV_VER); |
| MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); |
| MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); |
| MODULE_ALIAS_RTNL_LINK("geneve"); |