diff options
63 files changed, 2231 insertions, 952 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index ec86a11743fd..e9feefb41f0b 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -49,15 +49,12 @@ #include <net/ip6_tunnel.h> #include <net/ip6_checksum.h> #endif +#include <net/dst_metadata.h> #define VXLAN_VERSION "0.1" #define PORT_HASH_BITS 8 #define PORT_HASH_SIZE (1<<PORT_HASH_BITS) -#define VNI_HASH_BITS 10 -#define VNI_HASH_SIZE (1<<VNI_HASH_BITS) -#define FDB_HASH_BITS 8 -#define FDB_HASH_SIZE (1<<FDB_HASH_BITS) #define FDB_AGE_DEFAULT 300 /* 5 min */ #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ @@ -74,9 +71,13 @@ module_param(log_ecn_error, bool, 0644); MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); static int vxlan_net_id; +static struct rtnl_link_ops vxlan_link_ops; static const u8 all_zeros_mac[ETH_ALEN]; +static struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, + bool no_share, u32 flags); + /* per-network namespace private data for this module */ struct vxlan_net { struct list_head vxlan_list; @@ -84,21 +85,6 @@ struct vxlan_net { spinlock_t sock_lock; }; -union vxlan_addr { - struct sockaddr_in sin; - struct sockaddr_in6 sin6; - struct sockaddr sa; -}; - -struct vxlan_rdst { - union vxlan_addr remote_ip; - __be16 remote_port; - u32 remote_vni; - u32 remote_ifindex; - struct list_head list; - struct rcu_head rcu; -}; - /* Forwarding table entry */ struct vxlan_fdb { struct hlist_node hlist; /* linked list of entries */ @@ -111,35 +97,16 @@ struct vxlan_fdb { u8 flags; /* see ndm_flags */ }; -/* Pseudo network device */ -struct vxlan_dev { - struct hlist_node hlist; /* vni hash table */ - struct list_head next; /* vxlan's per namespace list */ - struct vxlan_sock *vn_sock; /* listening socket */ - struct net_device *dev; - struct net *net; /* netns for packet i/o */ - struct vxlan_rdst default_dst; /* default destination */ - union vxlan_addr saddr; /* source address */ - __be16 dst_port; - __u16 port_min; /* source port range */ - __u16 port_max; - __u8 tos; /* TOS override */ - __u8 ttl; - u32 flags; /* VXLAN_F_* in vxlan.h */ - - unsigned long age_interval; - struct timer_list age_timer; - spinlock_t hash_lock; - unsigned int addrcnt; - unsigned int addrmax; - - struct hlist_head fdb_head[FDB_HASH_SIZE]; -}; - /* salt for hash table */ static u32 vxlan_salt __read_mostly; static struct workqueue_struct *vxlan_wq; +static inline bool vxlan_collect_metadata(struct vxlan_sock *vs) +{ + return vs->flags & VXLAN_F_COLLECT_METADATA || + ip_tunnel_collect_metadata(); +} + #if IS_ENABLED(CONFIG_IPV6) static inline bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) @@ -345,7 +312,7 @@ static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) goto nla_put_failure; - if (rdst->remote_port && rdst->remote_port != vxlan->dst_port && + if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port && nla_put_be16(skb, NDA_PORT, rdst->remote_port)) goto nla_put_failure; if (rdst->remote_vni != vxlan->default_dst.remote_vni && @@ -749,7 +716,8 @@ static int vxlan_fdb_create(struct vxlan_dev *vxlan, if (!(flags & NLM_F_CREATE)) return -ENOENT; - if (vxlan->addrmax && vxlan->addrcnt >= vxlan->addrmax) + if (vxlan->cfg.addrmax && + vxlan->addrcnt >= vxlan->cfg.addrmax) return -ENOSPC; /* Disallow replace to add a multicast entry */ @@ -835,7 +803,7 @@ static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, return -EINVAL; *port = nla_get_be16(tb[NDA_PORT]); } else { - *port = vxlan->dst_port; + *port = vxlan->cfg.dst_port; } if (tb[NDA_VNI]) { @@ -1021,7 +989,7 @@ static bool vxlan_snoop(struct net_device *dev, vxlan_fdb_create(vxlan, src_mac, src_ip, NUD_REACHABLE, NLM_F_EXCL|NLM_F_CREATE, - vxlan->dst_port, + vxlan->cfg.dst_port, vxlan->default_dst.remote_vni, 0, NTF_SELF); spin_unlock(&vxlan->hash_lock); @@ -1062,7 +1030,7 @@ static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) return false; } -void vxlan_sock_release(struct vxlan_sock *vs) +static void vxlan_sock_release(struct vxlan_sock *vs) { struct sock *sk = vs->sock->sk; struct net *net = sock_net(sk); @@ -1078,7 +1046,6 @@ void vxlan_sock_release(struct vxlan_sock *vs) queue_work(vxlan_wq, &vs->del_work); } -EXPORT_SYMBOL_GPL(vxlan_sock_release); /* Update multicast group membership when first VNI on * multicast address is brought up @@ -1161,13 +1128,112 @@ static struct vxlanhdr *vxlan_remcsum(struct sk_buff *skb, struct vxlanhdr *vh, return vh; } +static void vxlan_rcv(struct vxlan_sock *vs, struct sk_buff *skb, + struct vxlan_metadata *md, u32 vni, + struct metadata_dst *tun_dst) +{ + struct iphdr *oip = NULL; + struct ipv6hdr *oip6 = NULL; + struct vxlan_dev *vxlan; + struct pcpu_sw_netstats *stats; + union vxlan_addr saddr; + int err = 0; + union vxlan_addr *remote_ip; + + /* For flow based devices, map all packets to VNI 0 */ + if (vs->flags & VXLAN_F_FLOW_BASED) + vni = 0; + + /* Is this VNI defined? */ + vxlan = vxlan_vs_find_vni(vs, vni); + if (!vxlan) + goto drop; + + remote_ip = &vxlan->default_dst.remote_ip; + skb_reset_mac_header(skb); + skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev))); + skb->protocol = eth_type_trans(skb, vxlan->dev); + skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); + + /* Ignore packet loops (and multicast echo) */ + if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) + goto drop; + + /* Re-examine inner Ethernet packet */ + if (remote_ip->sa.sa_family == AF_INET) { + oip = ip_hdr(skb); + saddr.sin.sin_addr.s_addr = oip->saddr; + saddr.sa.sa_family = AF_INET; +#if IS_ENABLED(CONFIG_IPV6) + } else { + oip6 = ipv6_hdr(skb); + saddr.sin6.sin6_addr = oip6->saddr; + saddr.sa.sa_family = AF_INET6; +#endif + } + + if (tun_dst) { + skb_dst_set(skb, (struct dst_entry *)tun_dst); + tun_dst = NULL; + } + + if ((vxlan->flags & VXLAN_F_LEARN) && + vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source)) + goto drop; + + skb_reset_network_header(skb); + /* In flow-based mode, GBP is carried in dst_metadata */ + if (!(vs->flags & VXLAN_F_FLOW_BASED)) + skb->mark = md->gbp; + + if (oip6) + err = IP6_ECN_decapsulate(oip6, skb); + if (oip) + err = IP_ECN_decapsulate(oip, skb); + + if (unlikely(err)) { + if (log_ecn_error) { + if (oip6) + net_info_ratelimited("non-ECT from %pI6\n", + &oip6->saddr); + if (oip) + net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", + &oip->saddr, oip->tos); + } + if (err > 1) { + ++vxlan->dev->stats.rx_frame_errors; + ++vxlan->dev->stats.rx_errors; + goto drop; + } + } + + stats = this_cpu_ptr(vxlan->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: + if (tun_dst) + dst_release((struct dst_entry *)tun_dst); + + /* Consume bad packet */ + kfree_skb(skb); +} + /* Callback from net/ipv4/udp.c to receive packets */ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) { + struct metadata_dst *tun_dst = NULL; + struct ip_tunnel_info *info; struct vxlan_sock *vs; struct vxlanhdr *vxh; u32 flags, vni; - struct vxlan_metadata md = {0}; + struct vxlan_metadata _md; + struct vxlan_metadata *md = &_md; /* Need Vxlan and inner Ethernet header to be present */ if (!pskb_may_pull(skb, VXLAN_HLEN)) @@ -1202,6 +1268,32 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) vni &= VXLAN_VNI_MASK; } + if (vxlan_collect_metadata(vs)) { + const struct iphdr *iph = ip_hdr(skb); + + tun_dst = metadata_dst_alloc(sizeof(*md), GFP_ATOMIC); + if (!tun_dst) + goto drop; + + info = &tun_dst->u.tun_info; + info->key.ipv4_src = iph->saddr; + info->key.ipv4_dst = iph->daddr; + info->key.ipv4_tos = iph->tos; + info->key.ipv4_ttl = iph->ttl; + info->key.tp_src = udp_hdr(skb)->source; + info->key.tp_dst = udp_hdr(skb)->dest; + + info->mode = IP_TUNNEL_INFO_RX; + info->key.tun_flags = TUNNEL_KEY; + info->key.tun_id = cpu_to_be64(vni >> 8); + if (udp_hdr(skb)->check != 0) + info->key.tun_flags |= TUNNEL_CSUM; + + md = ip_tunnel_info_opts(info, sizeof(*md)); + } else { + memset(md, 0, sizeof(*md)); + } + /* For backwards compatibility, only allow reserved fields to be * used by VXLAN extensions if explicitly requested. */ @@ -1209,13 +1301,16 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) struct vxlanhdr_gbp *gbp; gbp = (struct vxlanhdr_gbp *)vxh; - md.gbp = ntohs(gbp->policy_id); + md->gbp = ntohs(gbp->policy_id); + + if (tun_dst) + info->key.tun_flags |= TUNNEL_VXLAN_OPT; if (gbp->dont_learn) - md.gbp |= VXLAN_GBP_DONT_LEARN; + md->gbp |= VXLAN_GBP_DONT_LEARN; if (gbp->policy_applied) - md.gbp |= VXLAN_GBP_POLICY_APPLIED; + md->gbp |= VXLAN_GBP_POLICY_APPLIED; flags &= ~VXLAN_GBP_USED_BITS; } @@ -1233,8 +1328,7 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) goto bad_flags; } - md.vni = vxh->vx_vni; - vs->rcv(vs, skb, &md); + vxlan_rcv(vs, skb, md, vni >> 8, tun_dst); return 0; drop: @@ -1247,93 +1341,13 @@ bad_flags: ntohl(vxh->vx_flags), ntohl(vxh->vx_vni)); error: + if (tun_dst) + dst_release((struct dst_entry *)tun_dst); + /* Return non vxlan pkt */ return 1; } -static void vxlan_rcv(struct vxlan_sock *vs, struct sk_buff *skb, - struct vxlan_metadata *md) -{ - struct iphdr *oip = NULL; - struct ipv6hdr *oip6 = NULL; - struct vxlan_dev *vxlan; - struct pcpu_sw_netstats *stats; - union vxlan_addr saddr; - __u32 vni; - int err = 0; - union vxlan_addr *remote_ip; - - vni = ntohl(md->vni) >> 8; - /* Is this VNI defined? */ - vxlan = vxlan_vs_find_vni(vs, vni); - if (!vxlan) - goto drop; - - remote_ip = &vxlan->default_dst.remote_ip; - skb_reset_mac_header(skb); - skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev))); - skb->protocol = eth_type_trans(skb, vxlan->dev); - skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); - - /* Ignore packet loops (and multicast echo) */ - if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) - goto drop; - - /* Re-examine inner Ethernet packet */ - if (remote_ip->sa.sa_family == AF_INET) { - oip = ip_hdr(skb); - saddr.sin.sin_addr.s_addr = oip->saddr; - saddr.sa.sa_family = AF_INET; -#if IS_ENABLED(CONFIG_IPV6) - } else { - oip6 = ipv6_hdr(skb); - saddr.sin6.sin6_addr = oip6->saddr; - saddr.sa.sa_family = AF_INET6; -#endif - } - - if ((vxlan->flags & VXLAN_F_LEARN) && - vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source)) - goto drop; - - skb_reset_network_header(skb); - skb->mark = md->gbp; - - if (oip6) - err = IP6_ECN_decapsulate(oip6, skb); - if (oip) - err = IP_ECN_decapsulate(oip, skb); - - if (unlikely(err)) { - if (log_ecn_error) { - if (oip6) - net_info_ratelimited("non-ECT from %pI6\n", - &oip6->saddr); - if (oip) - net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", - &oip->saddr, oip->tos); - } - if (err > 1) { - ++vxlan->dev->stats.rx_frame_errors; - ++vxlan->dev->stats.rx_errors; - goto drop; - } - } - - stats = this_cpu_ptr(vxlan->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); -} - static int arp_reduce(struct net_device *dev, struct sk_buff *skb) { struct vxlan_dev *vxlan = netdev_priv(dev); @@ -1672,7 +1686,7 @@ static int vxlan6_xmit_skb(struct dst_entry *dst, struct sock *sk, struct sk_buff *skb, struct net_device *dev, struct in6_addr *saddr, struct in6_addr *daddr, __u8 prio, __u8 ttl, - __be16 src_port, __be16 dst_port, + __be16 src_port, __be16 dst_port, __u32 vni, struct vxlan_metadata *md, bool xnet, u32 vxflags) { struct vxlanhdr *vxh; @@ -1722,7 +1736,7 @@ static int vxlan6_xmit_skb(struct dst_entry *dst, struct sock *sk, vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); vxh->vx_flags = htonl(VXLAN_HF_VNI); - vxh->vx_vni = md->vni; + vxh->vx_vni = vni; if (type & SKB_GSO_TUNNEL_REMCSUM) { u32 data = (skb_checksum_start_offset(skb) - hdrlen) >> @@ -1755,10 +1769,10 @@ err: } #endif -int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, - __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, - __be16 src_port, __be16 dst_port, - struct vxlan_metadata *md, bool xnet, u32 vxflags) +static int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, + __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, + __be16 src_port, __be16 dst_port, __u32 vni, + struct vxlan_metadata *md, bool xnet, u32 vxflags) { struct vxlanhdr *vxh; int min_headroom; @@ -1801,7 +1815,7 @@ int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); vxh->vx_flags = htonl(VXLAN_HF_VNI); - vxh->vx_vni = md->vni; + vxh->vx_vni = vni; if (type & SKB_GSO_TUNNEL_REMCSUM) { u32 data = (skb_checksum_start_offset(skb) - hdrlen) >> @@ -1828,7 +1842,6 @@ int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, ttl, df, src_port, dst_port, xnet, !(vxflags & VXLAN_F_UDP_CSUM)); } -EXPORT_SYMBOL_GPL(vxlan_xmit_skb); /* Bypass encapsulation if the destination is local */ static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, @@ -1878,22 +1891,43 @@ static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, struct vxlan_rdst *rdst, bool did_rsc) { + struct ip_tunnel_info *info; struct vxlan_dev *vxlan = netdev_priv(dev); struct sock *sk = vxlan->vn_sock->sock->sk; struct rtable *rt = NULL; const struct iphdr *old_iph; struct flowi4 fl4; union vxlan_addr *dst; - struct vxlan_metadata md; + union vxlan_addr remote_ip; + struct vxlan_metadata _md; + struct vxlan_metadata *md = &_md; __be16 src_port = 0, dst_port; u32 vni; __be16 df = 0; __u8 tos, ttl; int err; + u32 flags = vxlan->flags; - dst_port = rdst->remote_port ? rdst->remote_port : vxlan->dst_port; - vni = rdst->remote_vni; - dst = &rdst->remote_ip; + /* FIXME: Support IPv6 */ + info = skb_tunnel_info(skb, AF_INET); + + if (rdst) { + dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port; + vni = rdst->remote_vni; + dst = &rdst->remote_ip; + } else { + if (!info) { + WARN_ONCE(1, "%s: Missing encapsulation instructions\n", + dev->name); + goto drop; + } + + dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port; + vni = be64_to_cpu(info->key.tun_id); + remote_ip.sin.sin_family = AF_INET; + remote_ip.sin.sin_addr.s_addr = info->key.ipv4_dst; + dst = &remote_ip; + } if (vxlan_addr_any(dst)) { if (did_rsc) { @@ -1906,25 +1940,42 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, old_iph = ip_hdr(skb); - ttl = vxlan->ttl; + ttl = vxlan->cfg.ttl; if (!ttl && vxlan_addr_multicast(dst)) ttl = 1; - tos = vxlan->tos; + tos = vxlan->cfg.tos; if (tos == 1) tos = ip_tunnel_get_dsfield(old_iph, skb); - src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->port_min, - vxlan->port_max, true); + src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, + vxlan->cfg.port_max, true); if (dst->sa.sa_family == AF_INET) { + if (info) { + if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) + df = htons(IP_DF); + if (info->key.tun_flags & TUNNEL_CSUM) + flags |= VXLAN_F_UDP_CSUM; + else + flags &= ~VXLAN_F_UDP_CSUM; + + ttl = info->key.ipv4_ttl; + tos = info->key.ipv4_tos; + + if (info->options_len) + md = ip_tunnel_info_opts(info, sizeof(*md)); + } else { + md->gbp = skb->mark; + } + memset(&fl4, 0, sizeof(fl4)); - fl4.flowi4_oif = rdst->remote_ifindex; + fl4.flowi4_oif = rdst ? rdst->remote_ifindex : 0; fl4.flowi4_tos = RT_TOS(tos); fl4.flowi4_mark = skb->mark; fl4.flowi4_proto = IPPROTO_UDP; fl4.daddr = dst->sin.sin_addr.s_addr; - fl4.saddr = vxlan->saddr.sin.sin_addr.s_addr; + fl4.saddr = vxlan->cfg.saddr.sin.sin_addr.s_addr; rt = ip_route_output_key(vxlan->net, &fl4); if (IS_ERR(rt)) { @@ -1958,14 +2009,11 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, tos = ip_tunnel_ecn_encap(tos, old_iph, skb); ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); - md.vni = htonl(vni << 8); - md.gbp = skb->mark; - err = vxlan_xmit_skb(rt, sk, skb, fl4.saddr, dst->sin.sin_addr.s_addr, tos, ttl, df, - src_port, dst_port, &md, + src_port, dst_port, htonl(vni << 8), md, !net_eq(vxlan->net, dev_net(vxlan->dev)), - vxlan->flags); + flags); if (err < 0) { /* skb is already freed. */ skb = NULL; @@ -1980,9 +2028,9 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, u32 flags; memset(&fl6, 0, sizeof(fl6)); - fl6.flowi6_oif = rdst->remote_ifindex; + fl6.flowi6_oif = rdst ? rdst->remote_ifindex : 0; fl6.daddr = dst->sin6.sin6_addr; - fl6.saddr = vxlan->saddr.sin6.sin6_addr; + fl6.saddr = vxlan->cfg.saddr.sin6.sin6_addr; fl6.flowi6_mark = skb->mark; fl6.flowi6_proto = IPPROTO_UDP; @@ -2018,11 +2066,10 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, } ttl = ttl ? : ip6_dst_hoplimit(ndst); - md.vni = htonl(vni << 8); - md.gbp = skb->mark; + md->gbp = skb->mark; err = vxlan6_xmit_skb(ndst, sk, skb, dev, &fl6.saddr, &fl6.daddr, - 0, ttl, src_port, dst_port, &md, + 0, ttl, src_port, dst_port, htonl(vni << 8), md, !net_eq(vxlan->net, dev_net(vxlan->dev)), vxlan->flags); #endif @@ -2051,11 +2098,15 @@ tx_free: static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) { struct vxlan_dev *vxlan = netdev_priv(dev); + const struct ip_tunnel_info *info; struct ethhdr *eth; bool did_rsc = false; struct vxlan_rdst *rdst, *fdst = NULL; struct vxlan_fdb *f; + /* FIXME: Support IPv6 */ + info = skb_tunnel_info(skb, AF_INET); + skb_reset_mac_header(skb); eth = eth_hdr(skb); @@ -2078,6 +2129,12 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) #endif } + if (vxlan->flags & VXLAN_F_FLOW_BASED && + info && info->mode == IP_TUNNEL_INFO_TX) { + vxlan_xmit_one(skb, dev, NULL, false); + return NETDEV_TX_OK; + } + f = vxlan_find_mac(vxlan, eth->h_dest); did_rsc = false; @@ -2143,7 +2200,7 @@ static void vxlan_cleanup(unsigned long arg) if (f->state & NUD_PERMANENT) continue; - timeout = f->used + vxlan->age_interval * HZ; + timeout = f->used + vxlan->cfg.age_interval * HZ; if (time_before_eq(timeout, jiffies)) { netdev_dbg(vxlan->dev, "garbage collect %pM\n", @@ -2207,8 +2264,8 @@ static int vxlan_open(struct net_device *dev) struct vxlan_sock *vs; int ret = 0; - vs = vxlan_sock_add(vxlan->net, vxlan->dst_port, vxlan_rcv, NULL, - false, vxlan->flags); + vs = vxlan_sock_add(vxlan->net, vxlan->cfg.dst_port, + vxlan->cfg.no_share, vxlan->flags); if (IS_ERR(vs)) return PTR_ERR(vs); @@ -2222,7 +2279,7 @@ static int vxlan_open(struct net_device *dev) } } - if (vxlan->age_interval) + if (vxlan->cfg.age_interval) mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); return ret; @@ -2380,7 +2437,7 @@ static void vxlan_setup(struct net_device *dev) vxlan->age_timer.function = vxlan_cleanup; vxlan->age_timer.data = (unsigned long) vxlan; - vxlan->dst_port = htons(vxlan_port); + vxlan->cfg.dst_port = htons(vxlan_port); vxlan->dev = dev; @@ -2405,6 +2462,7 @@ static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, + [IFLA_VXLAN_FLOWBASED] = { .type = NLA_U8 }, [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 }, [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, @@ -2500,7 +2558,6 @@ static struct socket *vxlan_create_sock(struct net *net, bool ipv6, /* Create new listen socket if needed */ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, - vxlan_rcv_t *rcv, void *data, u32 flags) { struct vxlan_net *vn = net_generic(net, vxlan_net_id); @@ -2529,8 +2586,6 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, vs->sock = sock; atomic_set(&vs->refcnt, 1); - vs->rcv = rcv; - vs->data = data; vs->flags = (flags & VXLAN_F_RCV_FLAGS); /* Initialize the vxlan udp offloads structure */ @@ -2554,9 +2609,8 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, return vs; } -struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, - vxlan_rcv_t *rcv, void *data, - bool no_share, u32 flags) +static struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, + bool no_share, u32 flags) { struct vxlan_net *vn = net_generic(net, vxlan_net_id); struct vxlan_sock *vs; @@ -2566,7 +2620,7 @@ struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, spin_lock(&vn->sock_lock); vs = vxlan_find_sock(net, ipv6 ? AF_INET6 : AF_INET, port, flags); - if (vs && vs->rcv == rcv) { + if (vs) { if (!atomic_add_unless(&vs->refcnt, 1, 0)) vs = ERR_PTR(-EBUSY); spin_unlock(&vn->sock_lock); @@ -2575,58 +2629,38 @@ struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, spin_unlock(&vn->sock_lock); } - return vxlan_socket_create(net, port, rcv, data, flags); + return vxlan_socket_create(net, port, flags); } -EXPORT_SYMBOL_GPL(vxlan_sock_add); -static int vxlan_newlink(struct net *src_net, struct net_device *dev, - struct nlattr *tb[], struct nlattr *data[]) +static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, + struct vxlan_config *conf) { struct vxlan_net *vn = net_generic(src_net, vxlan_net_id); struct vxlan_dev *vxlan = netdev_priv(dev); struct vxlan_rdst *dst = &vxlan->default_dst; - __u32 vni; int err; bool use_ipv6 = false; - - if (!data[IFLA_VXLAN_ID]) - return -EINVAL; + __be16 default_port = vxlan->cfg.dst_port; vxlan->net = src_net; - vni = nla_get_u32(data[IFLA_VXLAN_ID]); - dst->remote_vni = vni; - - /* Unless IPv6 is explicitly requested, assume IPv4 */ - dst->remote_ip.sa.sa_family = AF_INET; - if (data[IFLA_VXLAN_GROUP]) { - dst->remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]); - } else if (data[IFLA_VXLAN_GROUP6]) { - if (!IS_ENABLED(CONFIG_IPV6)) - return -EPFNOSUPPORT; + dst->remote_vni = conf->vni; - dst->remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]); - dst->remote_ip.sa.sa_family = AF_INET6; - use_ipv6 = true; - } + memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip)); - if (data[IFLA_VXLAN_LOCAL]) { - vxlan->saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]); - vxlan->saddr.sa.sa_family = AF_INET; - } else if (data[IFLA_VXLAN_LOCAL6]) { - if (!IS_ENABLED(CONFIG_IPV6)) - return -EPFNOSUPPORT; + /* Unless IPv6 is explicitly requested, assume IPv4 */ + if (!dst->remote_ip.sa.sa_family) + dst->remote_ip.sa.sa_family = AF_INET; - /* TODO: respect scope id */ - vxlan->saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]); - vxlan->saddr.sa.sa_family = AF_INET6; + if (dst->remote_ip.sa.sa_family == AF_INET6 || + vxlan->cfg.saddr.sa.sa_family == AF_INET6) use_ipv6 = true; - } - if (data[IFLA_VXLAN_LINK] && - (dst->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]))) { + if (conf->remote_ifindex) { struct net_device *lowerdev - = __dev_get_by_index(src_net, dst->remote_ifindex); + = __dev_get_by_index(src_net, conf->remote_ifindex); + + dst->remote_ifindex = conf->remote_ifindex; if (!lowerdev) { pr_info("ifindex %d does not exist\n", dst->remote_ifindex); @@ -2644,7 +2678,7 @@ static int vxlan_newlink(struct net *src_net, struct net_device *dev, } #endif - if (!tb[IFLA_MTU]) + if (!conf->mtu) dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); dev->needed_headroom = lowerdev->hard_header_len + @@ -2652,101 +2686,188 @@ static int vxlan_newlink(struct net *src_net, struct net_device *dev, } else if (use_ipv6) vxlan->flags |= VXLAN_F_IPV6; + memcpy(&vxlan->cfg, conf, sizeof(*conf)); + if (!vxlan->cfg.dst_port) + vxlan->cfg.dst_port = default_port; + vxlan->flags |= conf->flags; + + if (!vxlan->cfg.age_interval) + vxlan->cfg.age_interval = FDB_AGE_DEFAULT; + + if (vxlan_find_vni(src_net, conf->vni, use_ipv6 ? AF_INET6 : AF_INET, + vxlan->cfg.dst_port, vxlan->flags)) + return -EEXIST; + + dev->ethtool_ops = &vxlan_ethtool_ops; + + /* create an fdb entry for a valid default destination */ + if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { + err = vxlan_fdb_create(vxlan, all_zeros_mac, + &vxlan->default_dst.remote_ip, + NUD_REACHABLE|NUD_PERMANENT, + NLM_F_EXCL|NLM_F_CREATE, + vxlan->cfg.dst_port, + vxlan->default_dst.remote_vni, + vxlan->default_dst.remote_ifindex, + NTF_SELF); + if (err) + return err; + } + + err = register_netdevice(dev); + if (err) { + vxlan_fdb_delete_default(vxlan); + return err; + } + + list_add(&vxlan->next, &vn->vxlan_list); + + return 0; +} + +struct net_device *vxlan_dev_create(struct net *net, const char *name, + u8 name_assign_type, struct vxlan_config *conf) +{ + 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, + &vxlan_link_ops, tb); + if (IS_ERR(dev)) + return dev; + + err = vxlan_dev_configure(net, dev, conf); + if (err < 0) { + free_netdev(dev); + return ERR_PTR(err); + } + + return dev; +} +EXPORT_SYMBOL_GPL(vxlan_dev_create); + +static int vxlan_newlink(struct net *src_net, struct net_device *dev, + struct nlattr *tb[], struct nlattr *data[]) +{ + struct vxlan_config conf; + int err; + + if (!data[IFLA_VXLAN_ID]) + return -EINVAL; + + memset(&conf, 0, sizeof(conf)); + conf.vni = nla_get_u32(data[IFLA_VXLAN_ID]); + + if (data[IFLA_VXLAN_GROUP]) { + conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]); + } else if (data[IFLA_VXLAN_GROUP6]) { + if (!IS_ENABLED(CONFIG_IPV6)) + return -EPFNOSUPPORT; + + conf.remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]); + conf.remote_ip.sa.sa_family = AF_INET6; + } + + if (data[IFLA_VXLAN_LOCAL]) { + conf.saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]); + conf.saddr.sa.sa_family = AF_INET; + } else if (data[IFLA_VXLAN_LOCAL6]) { + if (!IS_ENABLED(CONFIG_IPV6)) + return -EPFNOSUPPORT; + + /* TODO: respect scope id */ + conf.saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]); + conf.saddr.sa.sa_family = AF_INET6; + } + + if (data[IFLA_VXLAN_LINK]) + conf.remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]); + if (data[IFLA_VXLAN_TOS]) - vxlan->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); + conf.tos = nla_get_u8(data[IFLA_VXLAN_TOS]); if (data[IFLA_VXLAN_TTL]) - vxlan->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); + conf.ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) - vxlan->flags |= VXLAN_F_LEARN; + conf.flags |= VXLAN_F_LEARN; if (data[IFLA_VXLAN_AGEING]) - vxlan->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); - else - vxlan->age_interval = FDB_AGE_DEFAULT; + conf.age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) - vxlan->flags |= VXLAN_F_PROXY; + conf.flags |= VXLAN_F_PROXY; if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) - vxlan->flags |= VXLAN_F_RSC; + conf.flags |= VXLAN_F_RSC; if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) - vxlan->flags |= VXLAN_F_L2MISS; + conf.flags |= VXLAN_F_L2MISS; if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) - vxlan->flags |= VXLAN_F_L3MISS; + conf.flags |= VXLAN_F_L3MISS; if (data[IFLA_VXLAN_LIMIT]) - vxlan->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); + conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); + + if (data[IFLA_VXLAN_FLOWBASED] && + nla_get_u8(data[IFLA_VXLAN_FLOWBASED])) + conf.flags |= VXLAN_F_FLOW_BASED; if (data[IFLA_VXLAN_PORT_RANGE]) { const struct ifla_vxlan_port_range *p = nla_data(data[IFLA_VXLAN_PORT_RANGE]); - vxlan->port_min = ntohs(p->low); - vxlan->port_max = ntohs(p->high); + conf.port_min = ntohs(p->low); + conf.port_max = ntohs(p->high); } if (data[IFLA_VXLAN_PORT]) - vxlan->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); + conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) - vxlan->flags |= VXLAN_F_UDP_CSUM; + conf.flags |= VXLAN_F_UDP_CSUM; if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] && nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX])) - vxlan->flags |= VXLAN_F_UDP_ZERO_CSUM6_TX; + conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX; if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] && nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])) - vxlan->flags |= VXLAN_F_UDP_ZERO_CSUM6_RX; + conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX; if (data[IFLA_VXLAN_REMCSUM_TX] && nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX])) - vxlan->flags |= VXLAN_F_REMCSUM_TX; + conf.flags |= VXLAN_F_REMCSUM_TX; if (data[IFLA_VXLAN_REMCSUM_RX] && nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX])) - vxlan->flags |= VXLAN_F_REMCSUM_RX; + conf.flags |= VXLAN_F_REMCSUM_RX; if (data[IFLA_VXLAN_GBP]) - vxlan->flags |= VXLAN_F_GBP; + conf.flags |= VXLAN_F_GBP; if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) - vxlan->flags |= VXLAN_F_REMCSUM_NOPARTIAL; - - if (vxlan_find_vni(src_net, vni, use_ipv6 ? AF_INET6 : AF_INET, - vxlan->dst_port, vxlan->flags)) { - pr_info("duplicate VNI %u\n", vni); - return -EEXIST; - } + conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL; - dev->ethtool_ops = &vxlan_ethtool_ops; + err = vxlan_dev_configure(src_net, dev, &conf); + switch (err) { + case -ENODEV: + pr_info("ifindex %d does not exist\n", conf.remote_ifindex); + break; - /* create an fdb entry for a valid default destination */ - if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { - err = vxlan_fdb_create(vxlan, all_zeros_mac, - &vxlan->default_dst.remote_ip, - NUD_REACHABLE|NUD_PERMANENT, - NLM_F_EXCL|NLM_F_CREATE, - vxlan->dst_port, - vxlan->default_dst.remote_vni, - vxlan->default_dst.remote_ifindex, - NTF_SELF); - if (err) - return err; - } + case -EPERM: + pr_info("IPv6 is disabled via sysctl\n"); + break; - err = register_netdevice(dev); - if (err) { - vxlan_fdb_delete_default(vxlan); - return err; + case -EEXIST: + pr_info("duplicate VNI %u\n", conf.vni); + break; } - list_add(&vxlan->next, &vn->vxlan_list); - - return 0; + return err; } static void vxlan_dellink(struct net_device *dev, struct list_head *head) @@ -2777,6 +2898,7 @@ static size_t vxlan_get_size(const struct net_device *dev) nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ + nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_FLOWBASED */ nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ nla_total_size(sizeof(struct ifla_vxlan_port_range)) + @@ -2794,8 +2916,8 @@ static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) const struct vxlan_dev *vxlan = netdev_priv(dev); const struct vxlan_rdst *dst = &vxlan->default_dst; struct ifla_vxlan_port_range ports = { - .low = htons(vxlan->port_min), - .high = htons(vxlan->port_max), + .low = htons(vxlan->cfg.port_min), + .high = htons(vxlan->cfg.port_max), }; if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni)) @@ -2818,22 +2940,22 @@ static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) goto nla_put_failure; - if (!vxlan_addr_any(&vxlan->saddr)) { - if (vxlan->saddr.sa.sa_family == AF_INET) { + if (!vxlan_addr_any(&vxlan->cfg.saddr)) { + if (vxlan->cfg.saddr.sa.sa_family == AF_INET) { if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL, - vxlan->saddr.sin.sin_addr.s_addr)) + vxlan->cfg.saddr.sin.sin_addr.s_addr)) goto nla_put_failure; #if IS_ENABLED(CONFIG_IPV6) } else { if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6, - &vxlan->saddr.sin6.sin6_addr)) + &vxlan->cfg.saddr.sin6.sin6_addr)) goto nla_put_failure; #endif } } - if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->ttl) || - nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->tos) || + if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) || + nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) || nla_put_u8(skb, IFLA_VXLAN_LEARNING, !!(vxlan->flags & VXLAN_F_LEARN)) || nla_put_u8(skb, IFLA_VXLAN_PROXY, @@ -2843,9 +2965,11 @@ static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) !!(vxlan->flags & VXLAN_F_L2MISS)) || nla_put_u8(skb, IFLA_VXLAN_L3MISS, !!(vxlan->flags & VXLAN_F_L3MISS)) || - nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->age_interval) || - nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->addrmax) || - nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->dst_port) || + nla_put_u8(skb, IFLA_VXLAN_FLOWBASED, + !!(vxlan->flags & VXLAN_F_FLOW_BASED)) || + nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) || + nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) || + nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) || nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, !!(vxlan->flags & VXLAN_F_UDP_CSUM)) || nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, diff --git a/include/linux/lwtunnel.h b/include/linux/lwtunnel.h new file mode 100644 index 000000000000..97f32f8b4ae1 --- /dev/null +++ b/include/linux/lwtunnel.h @@ -0,0 +1,6 @@ +#ifndef _LINUX_LWTUNNEL_H_ +#define _LINUX_LWTUNNEL_H_ + +#include <uapi/linux/lwtunnel.h> + +#endif /* _LINUX_LWTUNNEL_H_ */ diff --git a/include/linux/mpls_iptunnel.h b/include/linux/mpls_iptunnel.h new file mode 100644 index 000000000000..ef29eb2d6dfd --- /dev/null +++ b/include/linux/mpls_iptunnel.h @@ -0,0 +1,6 @@ +#ifndef _LINUX_MPLS_IPTUNNEL_H +#define _LINUX_MPLS_IPTUNNEL_H + +#include <uapi/linux/mpls_iptunnel.h> + +#endif /* _LINUX_MPLS_IPTUNNEL_H */ diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 6bd96fe9416a..648a2c241993 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -3469,5 +3469,6 @@ static inline unsigned int skb_gso_network_seglen(const struct sk_buff *skb) skb_network_header(skb); return hdr_len + skb_gso_transport_seglen(skb); } + #endif /* __KERNEL__ */ #endif /* _LINUX_SKBUFF_H */ diff --git a/include/net/dst.h b/include/net/dst.h index 2bc73f8a00a9..2578811cef51 100644 --- a/include/net/dst.h +++ b/include/net/dst.h @@ -57,6 +57,7 @@ struct dst_entry { #define DST_FAKE_RTABLE 0x0040 #define DST_XFRM_TUNNEL 0x0080 #define DST_XFRM_QUEUE 0x0100 +#define DST_METADATA 0x0200 unsigned short pending_confirm; @@ -356,6 +357,9 @@ static inline int dst_discard(struct sk_buff *skb) } void *dst_alloc(struct dst_ops *ops, struct net_device *dev, int initial_ref, int initial_obsolete, unsigned short flags); +void dst_init(struct dst_entry *dst, struct dst_ops *ops, + struct net_device *dev, int initial_ref, int initial_obsolete, + unsigned short flags); void __dst_free(struct dst_entry *dst); struct dst_entry *dst_destroy(struct dst_entry *dst); @@ -457,7 +461,7 @@ static inline struct dst_entry *dst_check(struct dst_entry *dst, u32 cookie) return dst; } -void dst_init(void); +void dst_subsys_init(void); /* Flags for xfrm_lookup flags argument. */ enum { diff --git a/include/net/dst_metadata.h b/include/net/dst_metadata.h new file mode 100644 index 000000000000..7b0306894663 --- /dev/null +++ b/include/net/dst_metadata.h @@ -0,0 +1,55 @@ +#ifndef __NET_DST_METADATA_H +#define __NET_DST_METADATA_H 1 + +#include <linux/skbuff.h> +#include <net/ip_tunnels.h> +#include <net/dst.h> + +struct metadata_dst { + struct dst_entry dst; + size_t opts_len; + union { + struct ip_tunnel_info tun_info; + } u; +}; + +static inline struct metadata_dst *skb_metadata_dst(struct sk_buff *skb) +{ + struct metadata_dst *md_dst = (struct metadata_dst *) skb_dst(skb); + + if (md_dst && md_dst->dst.flags & DST_METADATA) + return md_dst; + + return NULL; +} + +static inline struct ip_tunnel_info *skb_tunnel_info(struct sk_buff *skb, + int family) +{ + struct metadata_dst *md_dst = skb_metadata_dst(skb); + struct rtable *rt; + + if (md_dst) + return &md_dst->u.tun_info; + + switch (family) { + case AF_INET: + rt = (struct rtable *)skb_dst(skb); + if (rt && rt->rt_lwtstate) + return lwt_tun_info(rt->rt_lwtstate); + break; + } + + return NULL; +} + +static inline bool skb_valid_dst(const struct sk_buff *skb) +{ + struct dst_entry *dst = skb_dst(skb); + + return dst && !(dst->flags & DST_METADATA); +} + +struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags); + +#endif /* __NET_DST_METADATA_H */ diff --git a/include/net/fib_rules.h b/include/net/fib_rules.h index 903a55efbffe..4e8f804f4589 100644 --- a/include/net/fib_rules.h +++ b/include/net/fib_rules.h @@ -19,6 +19,7 @@ struct fib_rule { u8 action; /* 3 bytes hole, try to use */ u32 target; + __be64 tun_id; struct fib_rule __rcu *ctarget; struct net *fr_net; diff --git a/include/net/flow.h b/include/net/flow.h index 8109a159d1b3..3098ae33a178 100644 --- a/include/net/flow.h +++ b/include/net/flow.h @@ -19,6 +19,10 @@ #define LOOPBACK_IFINDEX 1 +struct flowi_tunnel { + __be64 tun_id; +}; + struct flowi_common { int flowic_oif; int flowic_iif; @@ -30,6 +34,7 @@ struct flowi_common { #define FLOWI_FLAG_ANYSRC 0x01 #define FLOWI_FLAG_KNOWN_NH 0x02 __u32 flowic_secid; + struct flowi_tunnel flowic_tun_key; }; union flowi_uli { @@ -66,6 +71,7 @@ struct flowi4 { #define flowi4_proto __fl_common.flowic_proto #define flowi4_flags __fl_common.flowic_flags #define flowi4_secid __fl_common.flowic_secid +#define flowi4_tun_key __fl_common.flowic_tun_key /* (saddr,daddr) must be grouped, same order as in IP header */ __be32 saddr; @@ -95,6 +101,7 @@ static inline void flowi4_init_output(struct flowi4 *fl4, int oif, fl4->flowi4_proto = proto; fl4->flowi4_flags = flags; fl4->flowi4_secid = 0; + fl4->flowi4_tun_key.tun_id = 0; fl4->daddr = daddr; fl4->saddr = saddr; fl4->fl4_dport = dport; @@ -165,6 +172,7 @@ struct flowi { #define flowi_proto u.__fl_common.flowic_proto #define flowi_flags u.__fl_common.flowic_flags #define flowi_secid u.__fl_common.flowic_secid +#define flowi_tun_key u.__fl_common.flowic_tun_key } __attribute__((__aligned__(BITS_PER_LONG/8))); static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4) diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h index 3b76849c190f..276328e3daa6 100644 --- a/include/net/ip6_fib.h +++ b/include/net/ip6_fib.h @@ -51,6 +51,8 @@ struct fib6_config { struct nlattr *fc_mp; struct nl_info fc_nlinfo; + struct nlattr *fc_encap; + u16 fc_encap_type; }; struct fib6_node { @@ -131,6 +133,7 @@ struct rt6_info { /* more non-fragment space at head required */ unsigned short rt6i_nfheader_len; u8 rt6i_protocol; + struct lwtunnel_state *rt6i_lwtstate; }; static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst) diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h index 49c142bdf01e..5e0196084f1e 100644 --- a/include/net/ip_fib.h +++ b/include/net/ip_fib.h @@ -44,7 +44,9 @@ struct fib_config { u32 fc_flow; u32 fc_nlflags; struct nl_info fc_nlinfo; - }; + struct nlattr *fc_encap; + u16 fc_encap_type; +}; struct fib_info; struct rtable; @@ -89,6 +91,7 @@ struct fib_nh { struct rtable __rcu * __percpu *nh_pcpu_rth_output; struct rtable __rcu *nh_rth_input; struct fnhe_hash_bucket __rcu *nh_exceptions; + struct lwtunnel_state *nh_lwtstate; }; /* diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h index d8214cb88bbc..0a5a7763eec2 100644 --- a/include/net/ip_tunnels.h +++ b/include/net/ip_tunnels.h @@ -9,9 +9,9 @@ #include <net/dsfield.h> #include <net/gro_cells.h> #include <net/inet_ecn.h> -#include <net/ip.h> #include <net/netns/generic.h> #include <net/rtnetlink.h> +#include <net/lwtunnel.h> #if IS_ENABLED(CONFIG_IPV6) #include <net/ipv6.h> @@ -22,6 +22,37 @@ /* Keep error state on tunnel for 30 sec */ #define IPTUNNEL_ERR_TIMEO (30*HZ) +/* Used to memset ip_tunnel padding. */ +#define IP_TUNNEL_KEY_SIZE \ + (offsetof(struct ip_tunnel_key, tp_dst) + \ + FIELD_SIZEOF(struct ip_tunnel_key, tp_dst)) + +struct ip_tunnel_key { + __be64 tun_id; + __be32 ipv4_src; + __be32 ipv4_dst; + __be16 tun_flags; + __u8 ipv4_tos; + __u8 ipv4_ttl; + __be16 tp_src; + __be16 tp_dst; +} __packed __aligned(4); /* Minimize padding. */ + +/* Indicates whether the tunnel info structure represents receive + * or transmit tunnel parameters. + */ +enum { + IP_TUNNEL_INFO_RX, + IP_TUNNEL_INFO_TX, +}; + +struct ip_tunnel_info { + struct ip_tunnel_key key; + const void *options; + u8 options_len; + u8 mode; +}; + /* 6rd prefix/relay information */ #ifdef CONFIG_IPV6_SIT_6RD struct ip_tunnel_6rd_parm { @@ -136,6 +167,47 @@ int ip_tunnel_encap_add_ops(const struct ip_tunnel_encap_ops *op, int ip_tunnel_encap_del_ops(const struct ip_tunnel_encap_ops *op, unsigned int num); +static inline void __ip_tunnel_info_init(struct ip_tunnel_info *tun_info, + __be32 saddr, __be32 daddr, + u8 tos, u8 ttl, + __be16 tp_src, __be16 tp_dst, + __be64 tun_id, __be16 tun_flags, + const void *opts, u8 opts_len) +{ + tun_info->key.tun_id = tun_id; + tun_info->key.ipv4_src = saddr; + tun_info->key.ipv4_dst = daddr; + tun_info->key.ipv4_tos = tos; + tun_info->key.ipv4_ttl = ttl; + tun_info->key.tun_flags = tun_flags; + + /* For the tunnel types on the top of IPsec, the tp_src and tp_dst of + * the upper tunnel are used. + * E.g: GRE over IPSEC, the tp_src and tp_port are zero. + */ + tun_info->key.tp_src = tp_src; + tun_info->key.tp_dst = tp_dst; + + /* Clear struct padding. */ + if (sizeof(tun_info->key) != IP_TUNNEL_KEY_SIZE) + memset((unsigned char *)&tun_info->key + IP_TUNNEL_KEY_SIZE, + 0, sizeof(tun_info->key) - IP_TUNNEL_KEY_SIZE); + + tun_info->options = opts; + tun_info->options_len = opts_len; +} + +static inline void ip_tunnel_info_init(struct ip_tunnel_info *tun_info, + const struct iphdr *iph, + __be16 tp_src, __be16 tp_dst, + __be64 tun_id, __be16 tun_flags, + const void *opts, u8 opts_len) +{ + __ip_tunnel_info_init(tun_info, iph->saddr, iph->daddr, + iph->tos, iph->ttl, tp_src, tp_dst, + tun_id, tun_flags, opts, opts_len); +} + #ifdef CONFIG_INET int ip_tunnel_init(struct net_device *dev); @@ -221,6 +293,27 @@ static inline void iptunnel_xmit_stats(int err, } } +static inline void *ip_tunnel_info_opts(struct ip_tunnel_info *info, size_t n) +{ + return info + 1; +} + +static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) +{ + return (struct ip_tunnel_info *)lwtstate->data; +} + +extern struct static_key ip_tunnel_metadata_cnt; + +/* Returns > 0 if metadata should be collected */ +static inline int ip_tunnel_collect_metadata(void) +{ + return static_key_false(&ip_tunnel_metadata_cnt); +} + +void ip_tunnel_need_metadata(void); +void ip_tunnel_unneed_metadata(void); + #endif /* CONFIG_INET */ #endif /* __NET_IP_TUNNELS_H */ diff --git a/include/net/lwtunnel.h b/include/net/lwtunnel.h new file mode 100644 index 000000000000..918e03c1dafa --- /dev/null +++ b/include/net/lwtunnel.h @@ -0,0 +1,144 @@ +#ifndef __NET_LWTUNNEL_H +#define __NET_LWTUNNEL_H 1 + +#include <linux/lwtunnel.h> +#include <linux/netdevice.h> +#include <linux/skbuff.h> +#include <linux/types.h> +#include <net/route.h> + +#define LWTUNNEL_HASH_BITS 7 +#define LWTUNNEL_HASH_SIZE (1 << LWTUNNEL_HASH_BITS) + +/* lw tunnel state flags */ +#define LWTUNNEL_STATE_OUTPUT_REDIRECT 0x1 + +struct lwtunnel_state { + __u16 type; + __u16 flags; + atomic_t refcnt; + int len; + __u8 data[0]; +}; + +struct lwtunnel_encap_ops { + int (*build_state)(struct net_device *dev, struct nlattr *encap, + struct lwtunnel_state **ts); + int (*output)(struct sock *sk, struct sk_buff *skb); + int (*fill_encap)(struct sk_buff *skb, + struct lwtunnel_state *lwtstate); + int (*get_encap_size)(struct lwtunnel_state *lwtstate); + int (*cmp_encap)(struct lwtunnel_state *a, struct lwtunnel_state *b); +}; + +extern const struct lwtunnel_encap_ops __rcu * + lwtun_encaps[LWTUNNEL_ENCAP_MAX+1]; + +#ifdef CONFIG_LWTUNNEL +static inline void lwtunnel_state_get(struct lwtunnel_state *lws) +{ + atomic_inc(&lws->refcnt); +} + +static inline void lwtunnel_state_put(struct lwtunnel_state *lws) +{ + if (!lws) + return; + + if (atomic_dec_and_test(&lws->refcnt)) + kfree(lws); +} + +static inline bool lwtunnel_output_redirect(struct lwtunnel_state *lwtstate) +{ + if (lwtstate && (lwtstate->flags & LWTUNNEL_STATE_OUTPUT_REDIRECT)) + return true; + + return false; +} + +int lwtunnel_encap_add_ops(const struct lwtunnel_encap_ops *op, + unsigned int num); +int lwtunnel_encap_del_ops(const struct lwtunnel_encap_ops *op, + unsigned int num); +int lwtunnel_build_state(struct net_device *dev, u16 encap_type, + struct nlattr *encap, + struct lwtunnel_state **lws); +int lwtunnel_fill_encap(struct sk_buff *skb, + struct lwtunnel_state *lwtstate); +int lwtunnel_get_encap_size(struct lwtunnel_state *lwtstate); +struct lwtunnel_state *lwtunnel_state_alloc(int hdr_len); +int lwtunnel_cmp_encap(struct lwtunnel_state *a, struct lwtunnel_state *b); +int lwtunnel_output(struct sock *sk, struct sk_buff *skb); +int lwtunnel_output6(struct sock *sk, struct sk_buff *skb); + +#else + +static inline void lwtunnel_state_get(struct lwtunnel_state *lws) +{ +} + +static inline void lwtunnel_state_put(struct lwtunnel_state *lws) +{ +} + +static inline bool lwtunnel_output_redirect(struct lwtunnel_state *lwtstate) +{ + return false; +} + +static inline int lwtunnel_encap_add_ops(const struct lwtunnel_encap_ops *op, + unsigned int num) +{ + return -EOPNOTSUPP; + +} + +static inline int lwtunnel_encap_del_ops(const struct lwtunnel_encap_ops *op, + unsigned int num) +{ + return -EOPNOTSUPP; +} + +static inline int lwtunnel_build_state(struct net_device *dev, u16 encap_type, + struct nlattr *encap, + struct lwtunnel_state **lws) +{ + return -EOPNOTSUPP; +} + +static inline int lwtunnel_fill_encap(struct sk_buff *skb, + struct lwtunnel_state *lwtstate) +{ + return 0; +} + +static inline int lwtunnel_get_encap_size(struct lwtunnel_state *lwtstate) +{ + return 0; +} + +static inline struct lwtunnel_state *lwtunnel_state_alloc(int hdr_len) +{ + return NULL; +} + +static inline int lwtunnel_cmp_encap(struct lwtunnel_state *a, + struct lwtunnel_state *b) +{ + return 0; +} + +static inline int lwtunnel_output(struct sock *sk, struct sk_buff *skb) +{ + return -EOPNOTSUPP; +} + +static inline int lwtunnel_output6(struct sock *sk, struct sk_buff *skb) +{ + return -EOPNOTSUPP; +} + +#endif + +#endif /* __NET_LWTUNNEL_H */ diff --git a/include/net/mpls_iptunnel.h b/include/net/mpls_iptunnel.h new file mode 100644 index 000000000000..4757997f76ed --- /dev/null +++ b/include/net/mpls_iptunnel.h @@ -0,0 +1,29 @@ +/* + * Copyright (c) 2015 Cumulus Networks, Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#ifndef _NET_MPLS_IPTUNNEL_H +#define _NET_MPLS_IPTUNNEL_H 1 + +#define MAX_NEW_LABELS 2 + +struct mpls_iptunnel_encap { + u32 label[MAX_NEW_LABELS]; + u32 labels; +}; + +static inline struct mpls_iptunnel_encap *mpls_lwtunnel_encap(struct lwtunnel_state *lwtstate) +{ + return (struct mpls_iptunnel_encap *)lwtstate->data; +} + +#endif diff --git a/include/net/route.h b/include/net/route.h index fe22d03afb6a..2d45f419477f 100644 --- a/include/net/route.h +++ b/include/net/route.h @@ -66,6 +66,7 @@ struct rtable { struct list_head rt_uncached; struct uncached_list *rt_uncached_list; + struct lwtunnel_state *rt_lwtstate; }; static inline bool rt_is_input_route(const struct rtable *rt) diff --git a/include/net/rtnetlink.h b/include/net/rtnetlink.h index 343d922d15c2..18fdb98185ab 100644 --- a/include/net/rtnetlink.h +++ b/include/net/rtnetlink.h @@ -141,6 +141,7 @@ struct net_device *rtnl_create_link(struct net *net, const char *ifname, unsigned char name_assign_type, const struct rtnl_link_ops *ops, struct nlattr *tb[]); +int rtnl_delete_link(struct net_device *dev); int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm); int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len); diff --git a/include/net/vxlan.h b/include/net/vxlan.h index 0082b5d33d7d..eb8d721cdb67 100644 --- a/include/net/vxlan.h +++ b/include/net/vxlan.h @@ -7,6 +7,7 @@ #include <linux/skbuff.h> #include <linux/netdevice.h> #include <linux/udp.h> +#include <net/dst_metadata.h> #define VNI_HASH_BITS 10 #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) @@ -94,20 +95,18 @@ struct vxlanhdr { #define VXLAN_VNI_MASK (VXLAN_VID_MASK << 8) #define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr)) +#define VNI_HASH_BITS 10 +#define VNI_HASH_SIZE (1<<VNI_HASH_BITS) +#define FDB_HASH_BITS 8 +#define FDB_HASH_SIZE (1<<FDB_HASH_BITS) + struct vxlan_metadata { - __be32 vni; u32 gbp; }; -struct vxlan_sock; -typedef void (vxlan_rcv_t)(struct vxlan_sock *vh, struct sk_buff *skb, - struct vxlan_metadata *md); - /* per UDP socket information */ struct vxlan_sock { struct hlist_node hlist; - vxlan_rcv_t *rcv; - void *data; struct work_struct del_work; struct socket *sock; struct rcu_head rcu; @@ -117,6 +116,57 @@ struct vxlan_sock { u32 flags; }; +union vxlan_addr { + struct sockaddr_in sin; + struct sockaddr_in6 sin6; + struct sockaddr sa; +}; + +struct vxlan_rdst { + union vxlan_addr remote_ip; + __be16 remote_port; + u32 remote_vni; + u32 remote_ifindex; + struct list_head list; + struct rcu_head rcu; +}; + +struct vxlan_config { + union vxlan_addr remote_ip; + union vxlan_addr saddr; + u32 vni; + int remote_ifindex; + int mtu; + __be16 dst_port; + __u16 port_min; + __u16 port_max; + __u8 tos; + __u8 ttl; + u32 flags; + unsigned long age_interval; + unsigned int addrmax; + bool no_share; +}; + +/* Pseudo network device */ +struct vxlan_dev { + struct hlist_node hlist; /* vni hash table */ + struct list_head next; /* vxlan's per namespace list */ + struct vxlan_sock *vn_sock; /* listening socket */ + struct net_device *dev; + struct net *net; /* netns for packet i/o */ + struct vxlan_rdst default_dst; /* default destination */ + u32 flags; /* VXLAN_F_* in vxlan.h */ + + struct timer_list age_timer; + spinlock_t hash_lock; + unsigned int addrcnt; + + struct vxlan_config cfg; + + struct hlist_head fdb_head[FDB_HASH_SIZE]; +}; + #define VXLAN_F_LEARN 0x01 #define VXLAN_F_PROXY 0x02 #define VXLAN_F_RSC 0x04 @@ -130,6 +180,8 @@ struct vxlan_sock { #define VXLAN_F_REMCSUM_RX 0x400 #define VXLAN_F_GBP 0x800 #define VXLAN_F_REMCSUM_NOPARTIAL 0x1000 +#define VXLAN_F_COLLECT_METADATA 0x2000 +#define VXLAN_F_FLOW_BASED 0x4000 /* Flags that are used in the receive path. These flags must match in * order for a socket to be shareable @@ -137,18 +189,17 @@ struct vxlan_sock { #define VXLAN_F_RCV_FLAGS (VXLAN_F_GBP | \ VXLAN_F_UDP_ZERO_CSUM6_RX | \ VXLAN_F_REMCSUM_RX | \ - VXLAN_F_REMCSUM_NOPARTIAL) - -struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, - vxlan_rcv_t *rcv, void *data, - bool no_share, u32 flags); + VXLAN_F_REMCSUM_NOPARTIAL | \ + VXLAN_F_COLLECT_METADATA | \ + VXLAN_F_FLOW_BASED) -void vxlan_sock_release(struct vxlan_sock *vs); +struct net_device *vxlan_dev_create(struct net *net, const char *name, + u8 name_assign_type, struct vxlan_config *conf); -int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, - __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, - __be16 src_port, __be16 dst_port, struct vxlan_metadata *md, - bool xnet, u32 vxflags); +static inline __be16 vxlan_dev_dst_port(struct vxlan_dev *vxlan) +{ + return inet_sk(vxlan->vn_sock->sock->sk)->inet_sport; +} static inline netdev_features_t vxlan_features_check(struct sk_buff *skb, netdev_features_t features) diff --git a/include/uapi/linux/fib_rules.h b/include/uapi/linux/fib_rules.h index 2b82d7e30974..96161b8202b5 100644 --- a/include/uapi/linux/fib_rules.h +++ b/include/uapi/linux/fib_rules.h @@ -43,7 +43,7 @@ enum { FRA_UNUSED5, FRA_FWMARK, /* mark */ FRA_FLOW, /* flow/class id */ - FRA_UNUSED6, + FRA_TUN_ID, FRA_SUPPRESS_IFGROUP, FRA_SUPPRESS_PREFIXLEN, FRA_TABLE, /* Extended table id */ diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index 24d68b797c59..9eeb5d9cf8f0 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -382,6 +382,7 @@ enum { IFLA_VXLAN_REMCSUM_RX, IFLA_VXLAN_GBP, IFLA_VXLAN_REMCSUM_NOPARTIAL, + IFLA_VXLAN_FLOWBASED, __IFLA_VXLAN_MAX }; #define IFLA_VXLAN_MAX (__IFLA_VXLAN_MAX - 1) diff --git a/include/uapi/linux/lwtunnel.h b/include/uapi/linux/lwtunnel.h new file mode 100644 index 000000000000..31377bbea3f8 --- /dev/null +++ b/include/uapi/linux/lwtunnel.h @@ -0,0 +1,16 @@ +#ifndef _UAPI_LWTUNNEL_H_ +#define _UAPI_LWTUNNEL_H_ + +#include <linux/types.h> + +enum lwtunnel_encap_types { + LWTUNNEL_ENCAP_NONE, + LWTUNNEL_ENCAP_MPLS, + LWTUNNEL_ENCAP_IP, + __LWTUNNEL_ENCAP_MAX, +}; + +#define LWTUNNEL_ENCAP_MAX (__LWTUNNEL_ENCAP_MAX - 1) + + +#endif /* _UAPI_LWTUNNEL_H_ */ diff --git a/include/uapi/linux/mpls_iptunnel.h b/include/uapi/linux/mpls_iptunnel.h new file mode 100644 index 000000000000..d80a0498f77e --- /dev/null +++ b/include/uapi/linux/mpls_iptunnel.h @@ -0,0 +1,28 @@ +/* + * mpls tunnel api + * + * Authors: + * Roopa Prabhu <roopa@cumulusnetworks.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#ifndef _UAPI_LINUX_MPLS_IPTUNNEL_H +#define _UAPI_LINUX_MPLS_IPTUNNEL_H + +/* MPLS tunnel attributes + * [RTA_ENCAP] = { + * [MPLS_IPTUNNEL_DST] + * } + */ +enum { + MPLS_IPTUNNEL_UNSPEC, + MPLS_IPTUNNEL_DST, + __MPLS_IPTUNNEL_MAX, +}; +#define MPLS_IPTUNNEL_MAX (__MPLS_IPTUNNEL_MAX - 1) + +#endif /* _UAPI_LINUX_MPLS_IPTUNNEL_H */ diff --git a/include/uapi/linux/openvswitch.h b/include/uapi/linux/openvswitch.h index 1dab77601c21..d6b885460187 100644 --- a/include/uapi/linux/openvswitch.h +++ b/include/uapi/linux/openvswitch.h @@ -321,7 +321,7 @@ enum ovs_key_attr { * the accepted length of the array. */ #ifdef __KERNEL__ - OVS_KEY_ATTR_TUNNEL_INFO, /* struct ovs_tunnel_info */ + OVS_KEY_ATTR_TUNNEL_INFO, /* struct ip_tunnel_info */ #endif __OVS_KEY_ATTR_MAX }; diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h index fdd8f07f1d34..47d24cb3fbc1 100644 --- a/include/uapi/linux/rtnetlink.h +++ b/include/uapi/linux/rtnetlink.h @@ -286,6 +286,21 @@ enum rt_class_t { /* Routing message attributes */ +enum ip_tunnel_t { + IP_TUN_UNSPEC, + IP_TUN_ID, + IP_TUN_DST, + IP_TUN_SRC, + IP_TUN_TTL, + IP_TUN_TOS, + IP_TUN_SPORT, + IP_TUN_DPORT, + IP_TUN_FLAGS, + __IP_TUN_MAX, +}; + +#define IP_TUN_MAX (__IP_TUN_MAX - 1) + enum rtattr_type_t { RTA_UNSPEC, RTA_DST, @@ -308,6 +323,8 @@ enum rtattr_type_t { RTA_VIA, RTA_NEWDST, RTA_PREF, + RTA_ENCAP_TYPE, + RTA_ENCAP, __RTA_MAX }; diff --git a/net/Kconfig b/net/Kconfig index 57a7c5af3175..7021c1bf44d6 100644 --- a/net/Kconfig +++ b/net/Kconfig @@ -374,6 +374,13 @@ source "net/caif/Kconfig" source "net/ceph/Kconfig" source "net/nfc/Kconfig" +config LWTUNNEL + bool "Network light weight tunnels" + ---help--- + This feature provides an infrastructure to support light weight + tunnels like mpls. There is no netdevice associated with a light + weight tunnel endpoint. Tunnel encapsulation parameters are stored + with light weight tunnel state associated with fib routes. endif # if NET diff --git a/net/core/Makefile b/net/core/Makefile index fec0856dd6c0..086b01fbe1bd 100644 --- a/net/core/Makefile +++ b/net/core/Makefile @@ -23,3 +23,4 @@ obj-$(CONFIG_NETWORK_PHY_TIMESTAMPING) += timestamping.o obj-$(CONFIG_NET_PTP_CLASSIFY) += ptp_classifier.o obj-$(CONFIG_CGROUP_NET_PRIO) += netprio_cgroup.o obj-$(CONFIG_CGROUP_NET_CLASSID) += netclassid_cgroup.o +obj-$(CONFIG_LWTUNNEL) += lwtunnel.o diff --git a/net/core/dev.c b/net/core/dev.c index 2ee15afb412d..cb52cba30ae8 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -7669,7 +7669,7 @@ static int __init net_dev_init(void) open_softirq(NET_RX_SOFTIRQ, net_rx_action); hotcpu_notifier(dev_cpu_callback, 0); - dst_init(); + dst_subsys_init(); rc = 0; out: return rc; diff --git a/net/core/dst.c b/net/core/dst.c index e956ce6d1378..917364f0d0be 100644 --- a/net/core/dst.c +++ b/net/core/dst.c @@ -22,6 +22,7 @@ #include <linux/prefetch.h> #include <net/dst.h> +#include <net/dst_metadata.h> /* * Theory of operations: @@ -158,19 +159,10 @@ const u32 dst_default_metrics[RTAX_MAX + 1] = { [RTAX_MAX] = 0xdeadbeef, }; - -void *dst_alloc(struct dst_ops *ops, struct net_device *dev, - int initial_ref, int initial_obsolete, unsigned short flags) +void dst_init(struct dst_entry *dst, struct dst_ops *ops, + struct net_device *dev, int initial_ref, int initial_obsolete, + unsigned short flags) { - struct dst_entry *dst; - - if (ops->gc && dst_entries_get_fast(ops) > ops->gc_thresh) { - if (ops->gc(ops)) - return NULL; - } - dst = kmem_cache_alloc(ops->kmem_cachep, GFP_ATOMIC); - if (!dst) - return NULL; dst->child = NULL; dst->dev = dev; if (dev) @@ -200,6 +192,25 @@ void *dst_alloc(struct dst_ops *ops, struct net_device *dev, dst->next = NULL; if (!(flags & DST_NOCOUNT)) dst_entries_add(ops, 1); +} +EXPORT_SYMBOL(dst_init); + +void *dst_alloc(struct dst_ops *ops, struct net_device *dev, + int initial_ref, int initial_obsolete, unsigned short flags) +{ + struct dst_entry *dst; + + if (ops->gc && dst_entries_get_fast(ops) > ops->gc_thresh) { + if (ops->gc(ops)) + return NULL; + } + + dst = kmem_cache_alloc(ops->kmem_cachep, GFP_ATOMIC); + if (!dst) + return NULL; + + dst_init(dst, ops, dev, initial_ref, initial_obsolete, flags); + return dst; } EXPORT_SYMBOL(dst_alloc); @@ -248,7 +259,11 @@ again: dst->ops->destroy(dst); if (dst->dev) dev_put(dst->dev); - kmem_cache_free(dst->ops->kmem_cachep, dst); + + if (dst->flags & DST_METADATA) + kfree(dst); + else + kmem_cache_free(dst->ops->kmem_cachep, dst); dst = child; if (dst) { @@ -327,6 +342,47 @@ void __dst_destroy_metrics_generic(struct dst_entry *dst, unsigned long old) } EXPORT_SYMBOL(__dst_destroy_metrics_generic); +static struct dst_ops md_dst_ops = { + .family = AF_UNSPEC, +}; + +static int dst_md_discard_sk(struct sock *sk, struct sk_buff *skb) +{ + WARN_ONCE(1, "Attempting to call output on metadata dst\n"); + kfree_skb(skb); + return 0; +} + +static int dst_md_discard(struct sk_buff *skb) +{ + WARN_ONCE(1, "Attempting to call input on metadata dst\n"); + kfree_skb(skb); + return 0; +} + +struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags) +{ + struct metadata_dst *md_dst; + struct dst_entry *dst; + + md_dst = kmalloc(sizeof(*md_dst) + optslen, flags); + if (!md_dst) + return ERR_PTR(-ENOMEM); + + dst = &md_dst->dst; + dst_init(dst, &md_dst_ops, NULL, 1, DST_OBSOLETE_NONE, + DST_METADATA | DST_NOCACHE | DST_NOCOUNT); + + dst->input = dst_md_discard; + dst->output = dst_md_discard_sk; + + memset(dst + 1, 0, sizeof(*md_dst) + optslen - sizeof(*dst)); + md_dst->opts_len = optslen; + + return md_dst; +} +EXPORT_SYMBOL_GPL(metadata_dst_alloc); + /* Dirty hack. We did it in 2.2 (in __dst_free), * we have _very_ good reasons not to repeat * this mistake in 2.3, but we have no choice @@ -391,7 +447,7 @@ static struct notifier_block dst_dev_notifier = { .priority = -10, /* must be called after other network notifiers */ }; -void __init dst_init(void) +void __init dst_subsys_init(void) { register_netdevice_notifier(&dst_dev_notifier); } diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c index 9a12668f7d62..ae8306e7c56f 100644 --- a/net/core/fib_rules.c +++ b/net/core/fib_rules.c @@ -16,6 +16,7 @@ #include <net/net_namespace.h> #include <net/sock.h> #include <net/fib_rules.h> +#include <net/ip_tunnels.h> int fib_default_rule_add(struct fib_rules_ops *ops, u32 pref, u32 table, u32 flags) @@ -186,6 +187,9 @@ static int fib_rule_match(struct fib_rule *rule, struct fib_rules_ops *ops, if ((rule->mark ^ fl->flowi_mark) & rule->mark_mask) goto out; + if (rule->tun_id && (rule->tun_id != fl->flowi_tun_key.tun_id)) + goto out; + ret = ops->match(rule, fl, flags); out: return (rule->flags & FIB_RULE_INVERT) ? !ret : ret; @@ -330,6 +334,9 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh) if (tb[FRA_FWMASK]) rule->mark_mask = nla_get_u32(tb[FRA_FWMASK]); + if (tb[FRA_TUN_ID]) + rule->tun_id = nla_get_be64(tb[FRA_TUN_ID]); + rule->action = frh->action; rule->flags = frh->flags; rule->table = frh_get_table(frh, tb); @@ -407,6 +414,9 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh) if (unresolved) ops->unresolved_rules++; + if (rule->tun_id) + ip_tunnel_need_metadata(); + notify_rule_change(RTM_NEWRULE, rule, ops, nlh, NETLINK_CB(skb).portid); flush_route_cache(ops); rules_ops_put(ops); @@ -473,6 +483,10 @@ static int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr* nlh) (rule->mark_mask != nla_get_u32(tb[FRA_FWMASK]))) continue; + if (tb[FRA_TUN_ID] && + (rule->tun_id != nla_get_be64(tb[FRA_TUN_ID]))) + continue; + if (!ops->compare(rule, frh, tb)) continue; @@ -487,6 +501,9 @@ static int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr* nlh) goto errout; } + if (rule->tun_id) + ip_tunnel_unneed_metadata(); + list_del_rcu(&rule->list); if (rule->action == FR_ACT_GOTO) { @@ -535,7 +552,8 @@ static inline size_t fib_rule_nlmsg_size(struct fib_rules_ops *ops, + nla_total_size(4) /* FRA_SUPPRESS_PREFIXLEN */ + nla_total_size(4) /* FRA_SUPPRESS_IFGROUP */ + nla_total_size(4) /* FRA_FWMARK */ - + nla_total_size(4); /* FRA_FWMASK */ + + nla_total_size(4) /* FRA_FWMASK */ + + nla_total_size(8); /* FRA_TUN_ID */ if (ops->nlmsg_payload) payload += ops->nlmsg_payload(rule); @@ -591,7 +609,9 @@ static int fib_nl_fill_rule(struct sk_buff *skb, struct fib_rule *rule, ((rule->mark_mask || rule->mark) && nla_put_u32(skb, FRA_FWMASK, rule->mark_mask)) || (rule->target && - nla_put_u32(skb, FRA_GOTO, rule->target))) + nla_put_u32(skb, FRA_GOTO, rule->target)) || + (rule->tun_id && + nla_put_be64(skb, FRA_TUN_ID, rule->tun_id))) goto nla_put_failure; if (rule->suppress_ifgroup != -1) { diff --git a/net/core/lwtunnel.c b/net/core/lwtunnel.c new file mode 100644 index 000000000000..bb58826c708d --- /dev/null +++ b/net/core/lwtunnel.c @@ -0,0 +1,235 @@ +/* + * lwtunnel Infrastructure for light weight tunnels like mpls + * + * Authors: Roopa Prabhu, <roopa@cumulusnetworks.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + */ + +#include <linux/capability.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/uaccess.h> +#include <linux/skbuff.h> +#include <linux/netdevice.h> +#include <linux/lwtunnel.h> +#include <linux/in.h> +#include <linux/init.h> +#include <linux/err.h> + +#include <net/lwtunnel.h> +#include <net/rtnetlink.h> +#include <net/ip6_fib.h> + +struct lwtunnel_state *lwtunnel_state_alloc(int encap_len) +{ + struct lwtunnel_state *lws; + + lws = kzalloc(sizeof(*lws) + encap_len, GFP_ATOMIC); + + return lws; +} +EXPORT_SYMBOL(lwtunnel_state_alloc); + +const struct lwtunnel_encap_ops __rcu * + lwtun_encaps[LWTUNNEL_ENCAP_MAX + 1] __read_mostly; + +int lwtunnel_encap_add_ops(const struct lwtunnel_encap_ops *ops, + unsigned int num) +{ + if (num > LWTUNNEL_ENCAP_MAX) + return -ERANGE; + + return !cmpxchg((const struct lwtunnel_encap_ops **) + &lwtun_encaps[num], + NULL, ops) ? 0 : -1; +} +EXPORT_SYMBOL(lwtunnel_encap_add_ops); + +int lwtunnel_encap_del_ops(const struct lwtunnel_encap_ops *ops, + unsigned int encap_type) +{ + int ret; + + if (encap_type == LWTUNNEL_ENCAP_NONE || + encap_type > LWTUNNEL_ENCAP_MAX) + return -ERANGE; + + ret = (cmpxchg((const struct lwtunnel_encap_ops **) + &lwtun_encaps[encap_type], + ops, NULL) == ops) ? 0 : -1; + + synchronize_net(); + + return ret; +} +EXPORT_SYMBOL(lwtunnel_encap_del_ops); + +int lwtunnel_build_state(struct net_device *dev, u16 encap_type, + struct nlattr *encap, struct lwtunnel_state **lws) +{ + const struct lwtunnel_encap_ops *ops; + int ret = -EINVAL; + + if (encap_type == LWTUNNEL_ENCAP_NONE || + encap_type > LWTUNNEL_ENCAP_MAX) + return ret; + + ret = -EOPNOTSUPP; + rcu_read_lock(); + ops = rcu_dereference(lwtun_encaps[encap_type]); + if (likely(ops && ops->build_state)) + ret = ops->build_state(dev, encap, lws); + rcu_read_unlock(); + + return ret; +} +EXPORT_SYMBOL(lwtunnel_build_state); + +int lwtunnel_fill_encap(struct sk_buff *skb, struct lwtunnel_state *lwtstate) +{ + const struct lwtunnel_encap_ops *ops; + struct nlattr *nest; + int ret = -EINVAL; + + if (!lwtstate) + return 0; + + if (lwtstate->type == LWTUNNEL_ENCAP_NONE || + lwtstate->type > LWTUNNEL_ENCAP_MAX) + return 0; + + ret = -EOPNOTSUPP; + nest = nla_nest_start(skb, RTA_ENCAP); + rcu_read_lock(); + ops = rcu_dereference(lwtun_encaps[lwtstate->type]); + if (likely(ops && ops->fill_encap)) + ret = ops->fill_encap(skb, lwtstate); + rcu_read_unlock(); + + if (ret) + goto nla_put_failure; + nla_nest_end(skb, nest); + ret = nla_put_u16(skb, RTA_ENCAP_TYPE, lwtstate->type); + if (ret) + goto nla_put_failure; + + return 0; + +nla_put_failure: + nla_nest_cancel(skb, nest); + + return (ret == -EOPNOTSUPP ? 0 : ret); +} +EXPORT_SYMBOL(lwtunnel_fill_encap); + +int lwtunnel_get_encap_size(struct lwtunnel_state *lwtstate) +{ + const struct lwtunnel_encap_ops *ops; + int ret = 0; + + if (!lwtstate) + return 0; + + if (lwtstate->type == LWTUNNEL_ENCAP_NONE || + lwtstate->type > LWTUNNEL_ENCAP_MAX) + return 0; + + rcu_read_lock(); + ops = rcu_dereference(lwtun_encaps[lwtstate->type]); + if (likely(ops && ops->get_encap_size)) + ret = nla_total_size(ops->get_encap_size(lwtstate)); + rcu_read_unlock(); + + return ret; +} +EXPORT_SYMBOL(lwtunnel_get_encap_size); + +int lwtunnel_cmp_encap(struct lwtunnel_state *a, struct lwtunnel_state *b) +{ + const struct lwtunnel_encap_ops *ops; + int ret = 0; + + if (!a && !b) + return 0; + + if (!a || !b) + return 1; + + if (a->type != b->type) + return 1; + + if (a->type == LWTUNNEL_ENCAP_NONE || + a->type > LWTUNNEL_ENCAP_MAX) + return 0; + + rcu_read_lock(); + ops = rcu_dereference(lwtun_encaps[a->type]); + if (likely(ops && ops->cmp_encap)) + ret = ops->cmp_encap(a, b); + rcu_read_unlock(); + + return ret; +} +EXPORT_SYMBOL(lwtunnel_cmp_encap); + +int __lwtunnel_output(struct sock *sk, struct sk_buff *skb, + struct lwtunnel_state *lwtstate) +{ + const struct lwtunnel_encap_ops *ops; + int ret = -EINVAL; + + if (!lwtstate) + goto drop; + + if (lwtstate->type == LWTUNNEL_ENCAP_NONE || + lwtstate->type > LWTUNNEL_ENCAP_MAX) + return 0; + + ret = -EOPNOTSUPP; + rcu_read_lock(); + ops = rcu_dereference(lwtun_encaps[lwtstate->type]); + if (likely(ops && ops->output)) + ret = ops->output(sk, skb); + rcu_read_unlock(); + + if (ret == -EOPNOTSUPP) + goto drop; + + return ret; + +drop: + kfree(skb); + + return ret; +} + +int lwtunnel_output6(struct sock *sk, struct sk_buff *skb) +{ + struct rt6_info *rt = (struct rt6_info *)skb_dst(skb); + struct lwtunnel_state *lwtstate = NULL; + + if (rt) + lwtstate = rt->rt6i_lwtstate; + + return __lwtunnel_output(sk, skb, lwtstate); +} +EXPORT_SYMBOL(lwtunnel_output6); + +int lwtunnel_output(struct sock *sk, struct sk_buff *skb) +{ + struct rtable *rt = (struct rtable *)skb_dst(skb); + struct lwtunnel_state *lwtstate = NULL; + + if (rt) + lwtstate = rt->rt_lwtstate; + + return __lwtunnel_output(sk, skb, lwtstate); +} +EXPORT_SYMBOL(lwtunnel_output); diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 03d61b54aac0..5fb4af20c6dd 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -1960,16 +1960,30 @@ static int rtnl_group_dellink(const struct net *net, int group) return 0; } +int rtnl_delete_link(struct net_device *dev) +{ + const struct rtnl_link_ops *ops; + LIST_HEAD(list_kill); + + ops = dev->rtnl_link_ops; + if (!ops || !ops->dellink) + return -EOPNOTSUPP; + + ops->dellink(dev, &list_kill); + unregister_netdevice_many(&list_kill); + + return 0; +} +EXPORT_SYMBOL_GPL(rtnl_delete_link); + static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) { struct net *net = sock_net(skb->sk); - const struct rtnl_link_ops *ops; struct net_device *dev; struct ifinfomsg *ifm; char ifname[IFNAMSIZ]; struct nlattr *tb[IFLA_MAX+1]; int err; - LIST_HEAD(list_kill); err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); if (err < 0) @@ -1991,13 +2005,7 @@ static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) if (!dev) return -ENODEV; - ops = dev->rtnl_link_ops; - if (!ops || !ops->dellink) - return -EOPNOTSUPP; - - ops->dellink(dev, &list_kill); - unregister_netdevice_many(&list_kill); - return 0; + return rtnl_delete_link(dev); } int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index 933a92820d26..1d59e50ce8b7 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -291,6 +291,40 @@ static void arp_error_report(struct neighbour *neigh, struct sk_buff *skb) kfree_skb(skb); } +/* Create and send an arp packet. */ +static void arp_send_dst(int type, int ptype, __be32 dest_ip, + struct net_device *dev, __be32 src_ip, + const unsigned char *dest_hw, + const unsigned char *src_hw, + const unsigned char *target_hw, struct sk_buff *oskb) +{ + struct sk_buff *skb; + + /* arp on this interface. */ + if (dev->flags & IFF_NOARP) + return; + + skb = arp_create(type, ptype, dest_ip, dev, src_ip, + dest_hw, src_hw, target_hw); + if (!skb) + return; + + if (oskb) + skb_dst_copy(skb, oskb); + + arp_xmit(skb); +} + +void arp_send(int type, int ptype, __be32 dest_ip, + struct net_device *dev, __be32 src_ip, + const unsigned char *dest_hw, const unsigned char *src_hw, + const unsigned char *target_hw) +{ + arp_send_dst(type, ptype, dest_ip, dev, src_ip, dest_hw, src_hw, + target_hw, NULL); +} +EXPORT_SYMBOL(arp_send); + static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb) { __be32 saddr = 0; @@ -346,8 +380,9 @@ static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb) } } - arp_send(ARPOP_REQUEST, ETH_P_ARP, target, dev, saddr, - dst_hw, dev->dev_addr, NULL); + arp_send_dst(ARPOP_REQUEST, ETH_P_ARP, target, dev, saddr, + dst_hw, dev->dev_addr, NULL, + dev->priv_flags & IFF_XMIT_DST_RELEASE ? NULL : skb); } static int arp_ignore(struct in_device *in_dev, __be32 sip, __be32 tip) @@ -597,32 +632,6 @@ void arp_xmit(struct sk_buff *skb) EXPORT_SYMBOL(arp_xmit); /* - * Create and send an arp packet. - */ -void arp_send(int type, int ptype, __be32 dest_ip, - struct net_device *dev, __be32 src_ip, - const unsigned char *dest_hw, const unsigned char *src_hw, - const unsigned char *target_hw) -{ - struct sk_buff *skb; - - /* - * No arp on this interface. - */ - - if (dev->flags&IFF_NOARP) - return; - - skb = arp_create(type, ptype, dest_ip, dev, src_ip, - dest_hw, src_hw, target_hw); - if (!skb) - return; - - arp_xmit(skb); -} -EXPORT_SYMBOL(arp_send); - -/* * Process an arp request. */ diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index 6bbc54940eb4..6b98de0d7949 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -280,6 +280,7 @@ __be32 fib_compute_spec_dst(struct sk_buff *skb) fl4.flowi4_tos = RT_TOS(ip_hdr(skb)->tos); fl4.flowi4_scope = scope; fl4.flowi4_mark = IN_DEV_SRC_VMARK(in_dev) ? skb->mark : 0; + fl4.flowi4_tun_key.tun_id = 0; if (!fib_lookup(net, &fl4, &res, 0)) return FIB_RES_PREFSRC(net, res); } else { @@ -313,6 +314,7 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst, fl4.saddr = dst; fl4.flowi4_tos = tos; fl4.flowi4_scope = RT_SCOPE_UNIVERSE; + fl4.flowi4_tun_key.tun_id = 0; no_addr = idev->ifa_list == NULL; @@ -591,6 +593,8 @@ const struct nla_policy rtm_ipv4_policy[RTA_MAX + 1] = { [RTA_METRICS] = { .type = NLA_NESTED }, [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) }, [RTA_FLOW] = { .type = NLA_U32 }, + [RTA_ENCAP_TYPE] = { .type = NLA_U16 }, + [RTA_ENCAP] = { .type = NLA_NESTED }, }; static int rtm_to_fib_config(struct net *net, struct sk_buff *skb, @@ -656,6 +660,12 @@ static int rtm_to_fib_config(struct net *net, struct sk_buff *skb, case RTA_TABLE: cfg->fc_table = nla_get_u32(attr); break; + case RTA_ENCAP: + cfg->fc_encap = attr; + break; + case RTA_ENCAP_TYPE: + cfg->fc_encap_type = nla_get_u16(attr); + break; } } diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index c7358ea4ae93..6754c64b2fe0 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -42,6 +42,7 @@ #include <net/ip_fib.h> #include <net/netlink.h> #include <net/nexthop.h> +#include <net/lwtunnel.h> #include "fib_lookup.h" @@ -208,6 +209,7 @@ static void free_fib_info_rcu(struct rcu_head *head) change_nexthops(fi) { if (nexthop_nh->nh_dev) dev_put(nexthop_nh->nh_dev); + lwtunnel_state_put(nexthop_nh->nh_lwtstate); free_nh_exceptions(nexthop_nh); rt_fibinfo_free_cpus(nexthop_nh->nh_pcpu_rth_output); rt_fibinfo_free(&nexthop_nh->nh_rth_input); @@ -266,6 +268,7 @@ static inline int nh_comp(const struct fib_info *fi, const struct fib_info *ofi) #ifdef CONFIG_IP_ROUTE_CLASSID nh->nh_tclassid != onh->nh_tclassid || #endif + lwtunnel_cmp_encap(nh->nh_lwtstate, onh->nh_lwtstate) || ((nh->nh_flags ^ onh->nh_flags) & ~RTNH_COMPARE_MASK)) return -1; onh++; @@ -366,6 +369,7 @@ static inline size_t fib_nlmsg_size(struct fib_info *fi) payload += nla_total_size((RTAX_MAX * nla_total_size(4))); if (fi->fib_nhs) { + size_t nh_encapsize = 0; /* Also handles the special case fib_nhs == 1 */ /* each nexthop is packed in an attribute */ @@ -374,8 +378,21 @@ static inline size_t fib_nlmsg_size(struct fib_info *fi) /* may contain flow and gateway attribute */ nhsize += 2 * nla_total_size(4); + /* grab encap info */ + for_nexthops(fi) { + if (nh->nh_lwtstate) { + /* RTA_ENCAP_TYPE */ + nh_encapsize += lwtunnel_get_encap_size( + nh->nh_lwtstate); + /* RTA_ENCAP */ + nh_encapsize += nla_total_size(2); + } + } endfor_nexthops(fi); + /* all nexthops are packed in a nested attribute */ - payload += nla_total_size(fi->fib_nhs * nhsize); + payload += nla_total_size((fi->fib_nhs * nhsize) + + nh_encapsize); + } return payload; @@ -452,6 +469,9 @@ static int fib_count_nexthops(struct rtnexthop *rtnh, int remaining) static int fib_get_nhs(struct fib_info *fi, struct rtnexthop *rtnh, int remaining, struct fib_config *cfg) { + struct net *net = cfg->fc_nlinfo.nl_net; + int ret; + change_nexthops(fi) { int attrlen; @@ -475,18 +495,66 @@ static int fib_get_nhs(struct fib_info *fi, struct rtnexthop *rtnh, if (nexthop_nh->nh_tclassid) fi->fib_net->ipv4.fib_num_tclassid_users++; #endif + nla = nla_find(attrs, attrlen, RTA_ENCAP); + if (nla) { + struct lwtunnel_state *lwtstate; + struct net_device *dev = NULL; + struct nlattr *nla_entype; + + nla_entype = nla_find(attrs, attrlen, + RTA_ENCAP_TYPE); + if (!nla_entype) + goto err_inval; + if (cfg->fc_oif) + dev = __dev_get_by_index(net, cfg->fc_oif); + ret = lwtunnel_build_state(dev, nla_get_u16( + nla_entype), + nla, &lwtstate); + if (ret) + goto errout; + lwtunnel_state_get(lwtstate); + nexthop_nh->nh_lwtstate = lwtstate; + } } rtnh = rtnh_next(rtnh, &remaining); } endfor_nexthops(fi); return 0; + +err_inval: + ret = -EINVAL; + +errout: + return ret; } #endif +int fib_encap_match(struct net *net, u16 encap_type, + struct nlattr *encap, + int oif, const struct fib_nh *nh) +{ + struct lwtunnel_state *lwtstate; + struct net_device *dev = NULL; + int ret; + + if (encap_type == LWTUNNEL_ENCAP_NONE) + return 0; + + if (oif) + dev = __dev_get_by_index(net, oif); + ret = lwtunnel_build_state(dev, encap_type, + encap, &lwtstate); + if (!ret) + return lwtunnel_cmp_encap(lwtstate, nh->nh_lwtstate); + + return 0; +} + int fib_nh_match(struct fib_config *cfg, struct fib_info *fi) { + struct net *net = cfg->fc_nlinfo.nl_net; #ifdef CONFIG_IP_ROUTE_MULTIPATH struct rtnexthop *rtnh; int remaining; @@ -496,6 +564,12 @@ int fib_nh_match(struct fib_config *cfg, struct fib_info *fi) return 1; if (cfg->fc_oif || cfg->fc_gw) { + if (cfg->fc_encap) { + if (fib_encap_match(net, cfg->fc_encap_type, + cfg->fc_encap, cfg->fc_oif, + fi->fib_nh)) + return 1; + } if ((!cfg->fc_oif || cfg->fc_oif == fi->fib_nh->nh_oif) && (!cfg->fc_gw || cfg->fc_gw == fi->fib_nh->nh_gw)) return 0; @@ -882,6 +956,22 @@ struct fib_info *fib_create_info(struct fib_config *cfg) } else { struct fib_nh *nh = fi->fib_nh; + if (cfg->fc_encap) { + struct lwtunnel_state *lwtstate; + struct net_device *dev = NULL; + + if (cfg->fc_encap_type == LWTUNNEL_ENCAP_NONE) + goto err_inval; + if (cfg->fc_oif) + dev = __dev_get_by_index(net, cfg->fc_oif); + err = lwtunnel_build_state(dev, cfg->fc_encap_type, + cfg->fc_encap, &lwtstate); + if (err) + goto failure; + + lwtunnel_state_get(lwtstate); + nh->nh_lwtstate = lwtstate; + } nh->nh_oif = cfg->fc_oif; nh->nh_gw = cfg->fc_gw; nh->nh_flags = cfg->fc_flags; @@ -1055,6 +1145,8 @@ int fib_dump_info(struct sk_buff *skb, u32 portid, u32 seq, int event, nla_put_u32(skb, RTA_FLOW, fi->fib_nh[0].nh_tclassid)) goto nla_put_failure; #endif + if (fi->fib_nh->nh_lwtstate) + lwtunnel_fill_encap(skb, fi->fib_nh->nh_lwtstate); } #ifdef CONFIG_IP_ROUTE_MULTIPATH if (fi->fib_nhs > 1) { @@ -1090,6 +1182,8 @@ int fib_dump_info(struct sk_buff *skb, u32 portid, u32 seq, int event, nla_put_u32(skb, RTA_FLOW, nh->nh_tclassid)) goto nla_put_failure; #endif + if (nh->nh_lwtstate) + lwtunnel_fill_encap(skb, nh->nh_lwtstate); /* length of rtnetlink header + attributes */ rtnh->rtnh_len = nlmsg_get_pos(skb) - (void *) rtnh; } endfor_nexthops(fi); diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index f5203fba6236..c0556f1e4bf0 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -496,6 +496,7 @@ static struct rtable *icmp_route_lookup(struct net *net, } /* Ugh! */ orefdst = skb_in->_skb_refdst; /* save old refdst */ + skb_dst_set(skb_in, NULL); err = ip_route_input(skb_in, fl4_dec.daddr, fl4_dec.saddr, RT_TOS(tos), rt2->dst.dev); diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c index 2db4c8773c1b..f4fc8a77aaa7 100644 --- a/net/ipv4/ip_input.c +++ b/net/ipv4/ip_input.c @@ -146,6 +146,7 @@ #include <net/xfrm.h> #include <linux/mroute.h> #include <linux/netlink.h> +#include <net/dst_metadata.h> /* * Process Router Attention IP option (RFC 2113) @@ -331,7 +332,7 @@ static int ip_rcv_finish(struct sock *sk, struct sk_buff *skb) * Initialise the virtual path cache for the packet. It describes * how the packet travels inside Linux networking. */ - if (!skb_dst(skb)) { + if (!skb_valid_dst(skb)) { int err = ip_route_input_noref(skb, iph->daddr, iph->saddr, iph->tos, skb->dev); if (unlikely(err)) { diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c index 6a51a71a6c67..630e6d5712e8 100644 --- a/net/ipv4/ip_tunnel_core.c +++ b/net/ipv4/ip_tunnel_core.c @@ -32,6 +32,7 @@ #include <linux/etherdevice.h> #include <linux/if_ether.h> #include <linux/if_vlan.h> +#include <linux/static_key.h> #include <net/ip.h> #include <net/icmp.h> @@ -190,3 +191,132 @@ struct rtnl_link_stats64 *ip_tunnel_get_stats64(struct net_device *dev, return tot; } EXPORT_SYMBOL_GPL(ip_tunnel_get_stats64); + +static const struct nla_policy ip_tun_policy[IP_TUN_MAX + 1] = { + [IP_TUN_ID] = { .type = NLA_U64 }, + [IP_TUN_DST] = { .type = NLA_U32 }, + [IP_TUN_SRC] = { .type = NLA_U32 }, + [IP_TUN_TTL] = { .type = NLA_U8 }, + [IP_TUN_TOS] = { .type = NLA_U8 }, + [IP_TUN_SPORT] = { .type = NLA_U16 }, + [IP_TUN_DPORT] = { .type = NLA_U16 }, + [IP_TUN_FLAGS] = { .type = NLA_U16 }, +}; + +static int ip_tun_build_state(struct net_device *dev, struct nlattr *attr, + struct lwtunnel_state **ts) +{ + struct ip_tunnel_info *tun_info; + struct lwtunnel_state *new_state; + struct nlattr *tb[IP_TUN_MAX + 1]; + int err; + + err = nla_parse_nested(tb, IP_TUN_MAX, attr, ip_tun_policy); + if (err < 0) + return err; + + new_state = lwtunnel_state_alloc(sizeof(*tun_info)); + if (!new_state) + return -ENOMEM; + + new_state->type = LWTUNNEL_ENCAP_IP; + + tun_info = lwt_tun_info(new_state); + + if (tb[IP_TUN_ID]) + tun_info->key.tun_id = nla_get_u64(tb[IP_TUN_ID]); + + if (tb[IP_TUN_DST]) + tun_info->key.ipv4_dst = nla_get_be32(tb[IP_TUN_DST]); + + if (tb[IP_TUN_SRC]) + tun_info->key.ipv4_src = nla_get_be32(tb[IP_TUN_SRC]); + + if (tb[IP_TUN_TTL]) + tun_info->key.ipv4_ttl = nla_get_u8(tb[IP_TUN_TTL]); + + if (tb[IP_TUN_TOS]) + tun_info->key.ipv4_tos = nla_get_u8(tb[IP_TUN_TOS]); + + if (tb[IP_TUN_SPORT]) + tun_info->key.tp_src = nla_get_be16(tb[IP_TUN_SPORT]); + + if (tb[IP_TUN_DPORT]) + tun_info->key.tp_dst = nla_get_be16(tb[IP_TUN_DPORT]); + + if (tb[IP_TUN_FLAGS]) + tun_info->key.tun_flags = nla_get_u16(tb[IP_TUN_FLAGS]); + + tun_info->mode = IP_TUNNEL_INFO_TX; + tun_info->options = NULL; + tun_info->options_len = 0; + + *ts = new_state; + + return 0; +} + +static int ip_tun_fill_encap_info(struct sk_buff *skb, + struct lwtunnel_state *lwtstate) +{ + struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); + + if (nla_put_u64(skb, IP_TUN_ID, tun_info->key.tun_id) || + nla_put_be32(skb, IP_TUN_DST, tun_info->key.ipv4_dst) || + nla_put_be32(skb, IP_TUN_SRC, tun_info->key.ipv4_src) || + nla_put_u8(skb, IP_TUN_TOS, tun_info->key.ipv4_tos) || + nla_put_u8(skb, IP_TUN_TTL, tun_info->key.ipv4_ttl) || + nla_put_u16(skb, IP_TUN_SPORT, tun_info->key.tp_src) || + nla_put_u16(skb, IP_TUN_DPORT, tun_info->key.tp_dst) || + nla_put_u16(skb, IP_TUN_FLAGS, tun_info->key.tun_flags)) + return -ENOMEM; + + return 0; +} + +static int ip_tun_encap_nlsize(struct lwtunnel_state *lwtstate) +{ + return nla_total_size(8) /* IP_TUN_ID */ + + nla_total_size(4) /* IP_TUN_DST */ + + nla_total_size(4) /* IP_TUN_SRC */ + + nla_total_size(1) /* IP_TUN_TOS */ + + nla_total_size(1) /* IP_TUN_TTL */ + + nla_total_size(2) /* IP_TUN_SPORT */ + + nla_total_size(2) /* IP_TUN_DPORT */ + + nla_total_size(2); /* IP_TUN_FLAGS */ +} + +static const struct lwtunnel_encap_ops ip_tun_lwt_ops = { + .build_state = ip_tun_build_state, + .fill_encap = ip_tun_fill_encap_info, + .get_encap_size = ip_tun_encap_nlsize, +}; + +static int __init ip_tunnel_core_init(void) +{ + lwtunnel_encap_add_ops(&ip_tun_lwt_ops, LWTUNNEL_ENCAP_IP); + + return 0; +} +module_init(ip_tunnel_core_init); + +static void __exit ip_tunnel_core_exit(void) +{ + lwtunnel_encap_del_ops(&ip_tun_lwt_ops, LWTUNNEL_ENCAP_IP); +} +module_exit(ip_tunnel_core_exit); + +struct static_key ip_tunnel_metadata_cnt = STATIC_KEY_INIT_FALSE; +EXPORT_SYMBOL(ip_tunnel_metadata_cnt); + +void ip_tunnel_need_metadata(void) +{ + static_key_slow_inc(&ip_tunnel_metadata_cnt); +} +EXPORT_SYMBOL_GPL(ip_tunnel_need_metadata); + +void ip_tunnel_unneed_metadata(void) +{ + static_key_slow_dec(&ip_tunnel_metadata_cnt); +} +EXPORT_SYMBOL_GPL(ip_tunnel_unneed_metadata); diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 04c83de4f79e..519ec232818d 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -91,6 +91,7 @@ #include <linux/slab.h> #include <linux/jhash.h> #include <net/dst.h> +#include <net/dst_metadata.h> #include <net/net_namespace.h> #include <net/protocol.h> #include <net/ip.h> @@ -102,6 +103,7 @@ #include <net/tcp.h> #include <net/icmp.h> #include <net/xfrm.h> +#include <net/lwtunnel.h> #include <net/netevent.h> #include <net/rtnetlink.h> #ifdef CONFIG_SYSCTL @@ -109,6 +111,7 @@ #include <linux/kmemleak.h> #endif #include <net/secure_seq.h> +#include <net/ip_tunnels.h> #define RT_FL_TOS(oldflp4) \ ((oldflp4)->flowi4_tos & (IPTOS_RT_MASK | RTO_ONLINK)) @@ -1355,6 +1358,7 @@ static void ipv4_dst_destroy(struct dst_entry *dst) list_del(&rt->rt_uncached); spin_unlock_bh(&ul->lock); } + lwtunnel_state_put(rt->rt_lwtstate); } void rt_flush_dev(struct net_device *dev) @@ -1403,6 +1407,12 @@ static void rt_set_nexthop(struct rtable *rt, __be32 daddr, #ifdef CONFIG_IP_ROUTE_CLASSID rt->dst.tclassid = nh->nh_tclassid; #endif + if (nh->nh_lwtstate) { + lwtunnel_state_get(nh->nh_lwtstate); + rt->rt_lwtstate = nh->nh_lwtstate; + } else { + rt->rt_lwtstate = NULL; + } if (unlikely(fnhe)) cached = rt_bind_exception(rt, fnhe, daddr); else if (!(rt->dst.flags & DST_NOCACHE)) @@ -1488,6 +1498,7 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr, rth->rt_gateway = 0; rth->rt_uses_gateway = 0; INIT_LIST_HEAD(&rth->rt_uncached); + rth->rt_lwtstate = NULL; if (our) { rth->dst.input= ip_local_deliver; rth->rt_flags |= RTCF_LOCAL; @@ -1617,12 +1628,15 @@ static int __mkroute_input(struct sk_buff *skb, rth->rt_gateway = 0; rth->rt_uses_gateway = 0; INIT_LIST_HEAD(&rth->rt_uncached); + rth->rt_lwtstate = NULL; RT_CACHE_STAT_INC(in_slow_tot); rth->dst.input = ip_forward; rth->dst.output = ip_output; rt_set_nexthop(rth, daddr, res, fnhe, res->fi, res->type, itag); + if (lwtunnel_output_redirect(rth->rt_lwtstate)) + rth->dst.output = lwtunnel_output; skb_dst_set(skb, &rth->dst); out: err = 0; @@ -1661,6 +1675,7 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr, { struct fib_result res; struct in_device *in_dev = __in_dev_get_rcu(dev); + struct ip_tunnel_info *tun_info; struct flowi4 fl4; unsigned int flags = 0; u32 itag = 0; @@ -1678,6 +1693,13 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr, by fib_lookup. */ + tun_info = skb_tunnel_info(skb, AF_INET); + if (tun_info && tun_info->mode == IP_TUNNEL_INFO_RX) + fl4.flowi4_tun_key.tun_id = tun_info->key.tun_id; + else + fl4.flowi4_tun_key.tun_id = 0; + skb_dst_drop(skb); + if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr)) goto martian_source; @@ -1791,6 +1813,8 @@ local_input: rth->rt_gateway = 0; rth->rt_uses_gateway = 0; INIT_LIST_HEAD(&rth->rt_uncached); + rth->rt_lwtstate = NULL; + RT_CACHE_STAT_INC(in_slow_tot); if (res.type == RTN_UNREACHABLE) { rth->dst.input= ip_error; @@ -1980,7 +2004,7 @@ add: rth->rt_gateway = 0; rth->rt_uses_gateway = 0; INIT_LIST_HEAD(&rth->rt_uncached); - + rth->rt_lwtstate = NULL; RT_CACHE_STAT_INC(out_slow_tot); if (flags & RTCF_LOCAL) @@ -2260,7 +2284,7 @@ struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_or rt->rt_uses_gateway = ort->rt_uses_gateway; INIT_LIST_HEAD(&rt->rt_uncached); - + rt->rt_lwtstate = NULL; dst_free(new); } diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c index 55d19861ab20..d715f2e0c4e7 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -32,6 +32,7 @@ #include <net/ipv6.h> #include <net/ndisc.h> #include <net/addrconf.h> +#include <net/lwtunnel.h> #include <net/ip6_fib.h> #include <net/ip6_route.h> @@ -177,6 +178,7 @@ static void rt6_free_pcpu(struct rt6_info *non_pcpu_rt) static void rt6_release(struct rt6_info *rt) { if (atomic_dec_and_test(&rt->rt6i_ref)) { + lwtunnel_state_put(rt->rt6i_lwtstate); rt6_free_pcpu(rt); dst_free(&rt->dst); } diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 6090969937f8..7f2214f8fde7 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -58,6 +58,7 @@ #include <net/netevent.h> #include <net/netlink.h> #include <net/nexthop.h> +#include <net/lwtunnel.h> #include <asm/uaccess.h> @@ -1770,6 +1771,18 @@ int ip6_route_add(struct fib6_config *cfg) rt->dst.output = ip6_output; + if (cfg->fc_encap) { + struct lwtunnel_state *lwtstate; + + err = lwtunnel_build_state(dev, cfg->fc_encap_type, + cfg->fc_encap, &lwtstate); + if (err) + goto out; + lwtunnel_state_get(lwtstate); + rt->rt6i_lwtstate = lwtstate; + rt->dst.output = lwtunnel_output6; + } + ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len); rt->rt6i_dst.plen = cfg->fc_dst_len; if (rt->rt6i_dst.plen == 128) @@ -2595,6 +2608,8 @@ static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = { [RTA_METRICS] = { .type = NLA_NESTED }, [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) }, [RTA_PREF] = { .type = NLA_U8 }, + [RTA_ENCAP_TYPE] = { .type = NLA_U16 }, + [RTA_ENCAP] = { .type = NLA_NESTED }, }; static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, @@ -2689,6 +2704,12 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, cfg->fc_flags |= RTF_PREF(pref); } + if (tb[RTA_ENCAP]) + cfg->fc_encap = tb[RTA_ENCAP]; + + if (tb[RTA_ENCAP_TYPE]) + cfg->fc_encap_type = nla_get_u16(tb[RTA_ENCAP_TYPE]); + err = 0; errout: return err; @@ -2721,6 +2742,10 @@ beginning: r_cfg.fc_gateway = nla_get_in6_addr(nla); r_cfg.fc_flags |= RTF_GATEWAY; } + r_cfg.fc_encap = nla_find(attrs, attrlen, RTA_ENCAP); + nla = nla_find(attrs, attrlen, RTA_ENCAP_TYPE); + if (nla) + r_cfg.fc_encap_type = nla_get_u16(nla); } err = add ? ip6_route_add(&r_cfg) : ip6_route_del(&r_cfg); if (err) { @@ -2783,7 +2808,7 @@ static int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh) return ip6_route_add(&cfg); } -static inline size_t rt6_nlmsg_size(void) +static inline size_t rt6_nlmsg_size(struct rt6_info *rt) { return NLMSG_ALIGN(sizeof(struct rtmsg)) + nla_total_size(16) /* RTA_SRC */ @@ -2797,7 +2822,8 @@ static inline size_t rt6_nlmsg_size(void) + RTAX_MAX * nla_total_size(4) /* RTA_METRICS */ + nla_total_size(sizeof(struct rta_cacheinfo)) + nla_total_size(TCP_CA_NAME_MAX) /* RTAX_CC_ALGO */ - + nla_total_size(1); /* RTA_PREF */ + + nla_total_size(1) /* RTA_PREF */ + + lwtunnel_get_encap_size(rt->rt6i_lwtstate); } static int rt6_fill_node(struct net *net, @@ -2945,6 +2971,8 @@ static int rt6_fill_node(struct net *net, if (nla_put_u8(skb, RTA_PREF, IPV6_EXTRACT_PREF(rt->rt6i_flags))) goto nla_put_failure; + lwtunnel_fill_encap(skb, rt->rt6i_lwtstate); + nlmsg_end(skb, nlh); return 0; @@ -3071,7 +3099,7 @@ void inet6_rt_notify(int event, struct rt6_info *rt, struct nl_info *info) err = -ENOBUFS; seq = info->nlh ? info->nlh->nlmsg_seq : 0; - skb = nlmsg_new(rt6_nlmsg_size(), gfp_any()); + skb = nlmsg_new(rt6_nlmsg_size(rt), gfp_any()); if (!skb) goto errout; diff --git a/net/mpls/Kconfig b/net/mpls/Kconfig index 17bde799c854..5c467ef97311 100644 --- a/net/mpls/Kconfig +++ b/net/mpls/Kconfig @@ -24,7 +24,13 @@ config NET_MPLS_GSO config MPLS_ROUTING tristate "MPLS: routing support" - help + ---help--- Add support for forwarding of mpls packets. +config MPLS_IPTUNNEL + tristate "MPLS: IP over MPLS tunnel support" + depends on LWTUNNEL && MPLS_ROUTING + ---help--- + mpls ip tunnel support. + endif # MPLS diff --git a/net/mpls/Makefile b/net/mpls/Makefile index 65bbe68c72e6..9ca923625016 100644 --- a/net/mpls/Makefile +++ b/net/mpls/Makefile @@ -3,5 +3,6 @@ # obj-$(CONFIG_NET_MPLS_GSO) += mpls_gso.o obj-$(CONFIG_MPLS_ROUTING) += mpls_router.o +obj-$(CONFIG_MPLS_IPTUNNEL) += mpls_iptunnel.o mpls_router-y := af_mpls.o diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c index 1f93a5978f2a..6e669114f829 100644 --- a/net/mpls/af_mpls.c +++ b/net/mpls/af_mpls.c @@ -58,10 +58,11 @@ static inline struct mpls_dev *mpls_dev_get(const struct net_device *dev) return rcu_dereference_rtnl(dev->mpls_ptr); } -static bool mpls_output_possible(const struct net_device *dev) +bool mpls_output_possible(const struct net_device *dev) { return dev && (dev->flags & IFF_UP) && netif_carrier_ok(dev); } +EXPORT_SYMBOL_GPL(mpls_output_possible); static unsigned int mpls_rt_header_size(const struct mpls_route *rt) { @@ -69,13 +70,14 @@ static unsigned int mpls_rt_header_size(const struct mpls_route *rt) return rt->rt_labels * sizeof(struct mpls_shim_hdr); } -static unsigned int mpls_dev_mtu(const struct net_device *dev) +unsigned int mpls_dev_mtu(const struct net_device *dev) { /* The amount of data the layer 2 frame can hold */ return dev->mtu; } +EXPORT_SYMBOL_GPL(mpls_dev_mtu); -static bool mpls_pkt_too_big(const struct sk_buff *skb, unsigned int mtu) +bool mpls_pkt_too_big(const struct sk_buff *skb, unsigned int mtu) { if (skb->len <= mtu) return false; @@ -85,6 +87,7 @@ static bool mpls_pkt_too_big(const struct sk_buff *skb, unsigned int mtu) return true; } +EXPORT_SYMBOL_GPL(mpls_pkt_too_big); static bool mpls_egress(struct mpls_route *rt, struct sk_buff *skb, struct mpls_entry_decoded dec) @@ -626,6 +629,7 @@ int nla_put_labels(struct sk_buff *skb, int attrtype, return 0; } +EXPORT_SYMBOL_GPL(nla_put_labels); int nla_get_labels(const struct nlattr *nla, u32 max_labels, u32 *labels, u32 label[]) @@ -671,6 +675,7 @@ int nla_get_labels(const struct nlattr *nla, *labels = nla_labels; return 0; } +EXPORT_SYMBOL_GPL(nla_get_labels); static int rtm_to_route_config(struct sk_buff *skb, struct nlmsghdr *nlh, struct mpls_route_config *cfg) diff --git a/net/mpls/internal.h b/net/mpls/internal.h index 8cabeb5a1cb9..2681a4ba6c37 100644 --- a/net/mpls/internal.h +++ b/net/mpls/internal.h @@ -50,7 +50,12 @@ static inline struct mpls_entry_decoded mpls_entry_decode(struct mpls_shim_hdr * return result; } -int nla_put_labels(struct sk_buff *skb, int attrtype, u8 labels, const u32 label[]); -int nla_get_labels(const struct nlattr *nla, u32 max_labels, u32 *labels, u32 label[]); +int nla_put_labels(struct sk_buff *skb, int attrtype, u8 labels, + const u32 label[]); +int nla_get_labels(const struct nlattr *nla, u32 max_labels, u32 *labels, + u32 label[]); +bool mpls_output_possible(const struct net_device *dev); +unsigned int mpls_dev_mtu(const struct net_device *dev); +bool mpls_pkt_too_big(const struct sk_buff *skb, unsigned int mtu); #endif /* MPLS_INTERNAL_H */ diff --git a/net/mpls/mpls_iptunnel.c b/net/mpls/mpls_iptunnel.c new file mode 100644 index 000000000000..eea096f21ba5 --- /dev/null +++ b/net/mpls/mpls_iptunnel.c @@ -0,0 +1,233 @@ +/* + * mpls tunnels An implementation mpls tunnels using the light weight tunnel + * infrastructure + * + * Authors: Roopa Prabhu, <roopa@cumulusnetworks.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + */ +#include <linux/types.h> +#include <linux/skbuff.h> +#include <linux/net.h> +#include <linux/module.h> +#include <linux/mpls.h> +#include <linux/vmalloc.h> +#include <net/ip.h> +#include <net/dst.h> +#include <net/lwtunnel.h> +#include <net/netevent.h> +#include <net/netns/generic.h> +#include <net/ip6_fib.h> +#include <net/route.h> +#include <net/mpls_iptunnel.h> +#include <linux/mpls_iptunnel.h> +#include "internal.h" + +static const struct nla_policy mpls_iptunnel_policy[MPLS_IPTUNNEL_MAX + 1] = { + [MPLS_IPTUNNEL_DST] = { .type = NLA_U32 }, +}; + +static unsigned int mpls_encap_size(struct mpls_iptunnel_encap *en) +{ + /* The size of the layer 2.5 labels to be added for this route */ + return en->labels * sizeof(struct mpls_shim_hdr); +} + +int mpls_output(struct sock *sk, struct sk_buff *skb) +{ + struct mpls_iptunnel_encap *tun_encap_info; + struct mpls_shim_hdr *hdr; + struct net_device *out_dev; + unsigned int hh_len; + unsigned int new_header_size; + unsigned int mtu; + struct dst_entry *dst = skb_dst(skb); + struct rtable *rt = NULL; + struct rt6_info *rt6 = NULL; + struct lwtunnel_state *lwtstate = NULL; + int err = 0; + bool bos; + int i; + unsigned int ttl; + + /* Obtain the ttl */ + if (skb->protocol == htons(ETH_P_IP)) { + ttl = ip_hdr(skb)->ttl; + rt = (struct rtable *)dst; + lwtstate = rt->rt_lwtstate; + } else if (skb->protocol == htons(ETH_P_IPV6)) { + ttl = ipv6_hdr(skb)->hop_limit; + rt6 = (struct rt6_info *)dst; + lwtstate = rt6->rt6i_lwtstate; + } else { + goto drop; + } + + skb_orphan(skb); + + /* Find the output device */ + out_dev = rcu_dereference(dst->dev); + if (!mpls_output_possible(out_dev) || + !lwtstate || skb_warn_if_lro(skb)) + goto drop; + + skb_forward_csum(skb); + + tun_encap_info = mpls_lwtunnel_encap(lwtstate); + + /* Verify the destination can hold the packet */ + new_header_size = mpls_encap_size(tun_encap_info); + mtu = mpls_dev_mtu(out_dev); + if (mpls_pkt_too_big(skb, mtu - new_header_size)) + goto drop; + + hh_len = LL_RESERVED_SPACE(out_dev); + if (!out_dev->header_ops) + hh_len = 0; + + /* Ensure there is enough space for the headers in the skb */ + if (skb_cow(skb, hh_len + new_header_size)) + goto drop; + + skb_push(skb, new_header_size); + skb_reset_network_header(skb); + + skb->dev = out_dev; + skb->protocol = htons(ETH_P_MPLS_UC); + + /* Push the new labels */ + hdr = mpls_hdr(skb); + bos = true; + for (i = tun_encap_info->labels - 1; i >= 0; i--) { + hdr[i] = mpls_entry_encode(tun_encap_info->label[i], + ttl, 0, bos); + bos = false; + } + + if (rt) + err = neigh_xmit(NEIGH_ARP_TABLE, out_dev, &rt->rt_gateway, + skb); + else if (rt6) + err = neigh_xmit(NEIGH_ND_TABLE, out_dev, &rt6->rt6i_gateway, + skb); + if (err) + net_dbg_ratelimited("%s: packet transmission failed: %d\n", + __func__, err); + + return 0; + +drop: + kfree_skb(skb); + return -EINVAL; +} + +static int mpls_build_state(struct net_device *dev, struct nlattr *nla, + struct lwtunnel_state **ts) +{ + struct mpls_iptunnel_encap *tun_encap_info; + struct nlattr *tb[MPLS_IPTUNNEL_MAX + 1]; + struct lwtunnel_state *newts; + int tun_encap_info_len; + int ret; + + ret = nla_parse_nested(tb, MPLS_IPTUNNEL_MAX, nla, + mpls_iptunnel_policy); + if (ret < 0) + return ret; + + if (!tb[MPLS_IPTUNNEL_DST]) + return -EINVAL; + + tun_encap_info_len = sizeof(*tun_encap_info); + + newts = lwtunnel_state_alloc(tun_encap_info_len); + if (!newts) + return -ENOMEM; + + newts->len = tun_encap_info_len; + tun_encap_info = mpls_lwtunnel_encap(newts); + ret = nla_get_labels(tb[MPLS_IPTUNNEL_DST], MAX_NEW_LABELS, + &tun_encap_info->labels, tun_encap_info->label); + if (ret) + goto errout; + newts->type = LWTUNNEL_ENCAP_MPLS; + newts->flags |= LWTUNNEL_STATE_OUTPUT_REDIRECT; + + *ts = newts; + + return 0; + +errout: + kfree(newts); + *ts = NULL; + + return ret; +} + +static int mpls_fill_encap_info(struct sk_buff *skb, + struct lwtunnel_state *lwtstate) +{ + struct mpls_iptunnel_encap *tun_encap_info; + + tun_encap_info = mpls_lwtunnel_encap(lwtstate); + + if (nla_put_labels(skb, MPLS_IPTUNNEL_DST, tun_encap_info->labels, + tun_encap_info->label)) + goto nla_put_failure; + + return 0; + +nla_put_failure: + return -EMSGSIZE; +} + +static int mpls_encap_nlsize(struct lwtunnel_state *lwtstate) +{ + struct mpls_iptunnel_encap *tun_encap_info; + + tun_encap_info = mpls_lwtunnel_encap(lwtstate); + + return nla_total_size(tun_encap_info->labels * 4); +} + +static int mpls_encap_cmp(struct lwtunnel_state *a, struct lwtunnel_state *b) +{ + struct mpls_iptunnel_encap *a_hdr = mpls_lwtunnel_encap(a); + struct mpls_iptunnel_encap *b_hdr = mpls_lwtunnel_encap(b); + int l; + + if (a_hdr->labels != b_hdr->labels) + return 1; + + for (l = 0; l < MAX_NEW_LABELS; l++) + if (a_hdr->label[l] != b_hdr->label[l]) + return 1; + return 0; +} + +static const struct lwtunnel_encap_ops mpls_iptun_ops = { + .build_state = mpls_build_state, + .output = mpls_output, + .fill_encap = mpls_fill_encap_info, + .get_encap_size = mpls_encap_nlsize, + .cmp_encap = mpls_encap_cmp, +}; + +static int __init mpls_iptunnel_init(void) +{ + return lwtunnel_encap_add_ops(&mpls_iptun_ops, LWTUNNEL_ENCAP_MPLS); +} +module_init(mpls_iptunnel_init); + +static void __exit mpls_iptunnel_exit(void) +{ + lwtunnel_encap_del_ops(&mpls_iptun_ops, LWTUNNEL_ENCAP_MPLS); +} +module_exit(mpls_iptunnel_exit); + +MODULE_DESCRIPTION("MultiProtocol Label Switching IP Tunnels"); +MODULE_LICENSE("GPL v2"); diff --git a/net/openvswitch/Kconfig b/net/openvswitch/Kconfig index 15840401a2ce..1119f46b80b4 100644 --- a/net/openvswitch/Kconfig +++ b/net/openvswitch/Kconfig @@ -44,18 +44,6 @@ config OPENVSWITCH_GRE If unsure, say Y. -config OPENVSWITCH_VXLAN - tristate "Open vSwitch VXLAN tunneling support" - depends on OPENVSWITCH - depends on VXLAN - default OPENVSWITCH - ---help--- - If you say Y here, then the Open vSwitch will be able create vxlan vport. - - Say N to exclude this support and reduce the binary size. - - If unsure, say Y. - config OPENVSWITCH_GENEVE tristate "Open vSwitch Geneve tunneling support" depends on OPENVSWITCH diff --git a/net/openvswitch/Makefile b/net/openvswitch/Makefile index 91b9478413ef..38e0e149c55e 100644 --- a/net/openvswitch/Makefile +++ b/net/openvswitch/Makefile @@ -16,5 +16,4 @@ openvswitch-y := \ vport-netdev.o obj-$(CONFIG_OPENVSWITCH_GENEVE)+= vport-geneve.o -obj-$(CONFIG_OPENVSWITCH_VXLAN) += vport-vxlan.o obj-$(CONFIG_OPENVSWITCH_GRE) += vport-gre.o diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c index 8a8c0b8b4f63..cf04c2f8b32a 100644 --- a/net/openvswitch/actions.c +++ b/net/openvswitch/actions.c @@ -611,7 +611,7 @@ static int output_userspace(struct datapath *dp, struct sk_buff *skb, struct sw_flow_key *key, const struct nlattr *attr, const struct nlattr *actions, int actions_len) { - struct ovs_tunnel_info info; + struct ip_tunnel_info info; struct dp_upcall_info upcall; const struct nlattr *a; int rem; @@ -733,7 +733,15 @@ static int execute_set_action(struct sk_buff *skb, { /* Only tunnel set execution is supported without a mask. */ if (nla_type(a) == OVS_KEY_ATTR_TUNNEL_INFO) { - OVS_CB(skb)->egress_tun_info = nla_data(a); + struct ovs_tunnel_info *tun = nla_data(a); + + skb_dst_drop(skb); + dst_hold((struct dst_entry *)tun->tun_dst); + skb_dst_set(skb, (struct dst_entry *)tun->tun_dst); + + /* FIXME: Remove when all vports have been converted */ + OVS_CB(skb)->egress_tun_info = &tun->tun_dst->u.tun_info; + return 0; } diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index ff8c4a4c1609..ffe984f5b95c 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -176,7 +176,7 @@ static inline struct datapath *get_dp(struct net *net, int dp_ifindex) const char *ovs_dp_name(const struct datapath *dp) { struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); - return vport->ops->get_name(vport); + return ovs_vport_name(vport); } static int get_dpifindex(const struct datapath *dp) @@ -188,7 +188,7 @@ static int get_dpifindex(const struct datapath *dp) local = ovs_vport_rcu(dp, OVSP_LOCAL); if (local) - ifindex = netdev_vport_priv(local)->dev->ifindex; + ifindex = local->dev->ifindex; else ifindex = 0; @@ -1018,7 +1018,7 @@ static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) } ovs_unlock(); - ovs_nla_free_flow_actions(old_acts); + ovs_nla_free_flow_actions_rcu(old_acts); ovs_flow_free(new_flow, false); } @@ -1030,7 +1030,7 @@ err_unlock_ovs: ovs_unlock(); kfree_skb(reply); err_kfree_acts: - kfree(acts); + ovs_nla_free_flow_actions(acts); err_kfree_flow: ovs_flow_free(new_flow, false); error: @@ -1157,7 +1157,7 @@ static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) if (reply) ovs_notify(&dp_flow_genl_family, reply, info); if (old_acts) - ovs_nla_free_flow_actions(old_acts); + ovs_nla_free_flow_actions_rcu(old_acts); return 0; @@ -1165,7 +1165,7 @@ err_unlock_ovs: ovs_unlock(); kfree_skb(reply); err_kfree_acts: - kfree(acts); + ovs_nla_free_flow_actions(acts); error: return error; } @@ -1800,7 +1800,7 @@ static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || nla_put_string(skb, OVS_VPORT_ATTR_NAME, - vport->ops->get_name(vport))) + ovs_vport_name(vport))) goto nla_put_failure; ovs_vport_get_stats(vport, &vport_stats); @@ -2219,13 +2219,10 @@ static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, struct vport *vport; hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { - struct netdev_vport *netdev_vport; - if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) continue; - netdev_vport = netdev_vport_priv(vport); - if (dev_net(netdev_vport->dev) == dnet) + if (dev_net(vport->dev) == dnet) list_add(&vport->detach_list, head); } } diff --git a/net/openvswitch/datapath.h b/net/openvswitch/datapath.h index cd691e935e08..6b28c5cedb23 100644 --- a/net/openvswitch/datapath.h +++ b/net/openvswitch/datapath.h @@ -25,6 +25,7 @@ #include <linux/netdevice.h> #include <linux/skbuff.h> #include <linux/u64_stats_sync.h> +#include <net/ip_tunnels.h> #include "flow.h" #include "flow_table.h" @@ -98,7 +99,7 @@ struct datapath { * when a packet is received by OVS. */ struct ovs_skb_cb { - struct ovs_tunnel_info *egress_tun_info; + struct ip_tunnel_info *egress_tun_info; struct vport *input_vport; }; #define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb) @@ -114,7 +115,7 @@ struct ovs_skb_cb { * @egress_tun_info: If nonnull, becomes %OVS_PACKET_ATTR_EGRESS_TUN_KEY. */ struct dp_upcall_info { - const struct ovs_tunnel_info *egress_tun_info; + const struct ip_tunnel_info *egress_tun_info; const struct nlattr *userdata; const struct nlattr *actions; int actions_len; diff --git a/net/openvswitch/dp_notify.c b/net/openvswitch/dp_notify.c index 2c631fe76be1..a7a80a6b77b0 100644 --- a/net/openvswitch/dp_notify.c +++ b/net/openvswitch/dp_notify.c @@ -58,13 +58,10 @@ void ovs_dp_notify_wq(struct work_struct *work) struct hlist_node *n; hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) { - struct netdev_vport *netdev_vport; - if (vport->ops->type != OVS_VPORT_TYPE_NETDEV) continue; - netdev_vport = netdev_vport_priv(vport); - if (!(netdev_vport->dev->priv_flags & IFF_OVS_DATAPATH)) + if (!(vport->dev->priv_flags & IFF_OVS_DATAPATH)) dp_detach_port_notify(vport); } } diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c index bc7b0aba994a..8db22ef73626 100644 --- a/net/openvswitch/flow.c +++ b/net/openvswitch/flow.c @@ -682,12 +682,12 @@ int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key) return key_extract(skb, key); } -int ovs_flow_key_extract(const struct ovs_tunnel_info *tun_info, +int ovs_flow_key_extract(const struct ip_tunnel_info *tun_info, struct sk_buff *skb, struct sw_flow_key *key) { /* Extract metadata from packet. */ if (tun_info) { - memcpy(&key->tun_key, &tun_info->tunnel, sizeof(key->tun_key)); + memcpy(&key->tun_key, &tun_info->key, sizeof(key->tun_key)); if (tun_info->options) { BUILD_BUG_ON((1 << (sizeof(tun_info->options_len) * diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h index a076e445ccc2..b62cdb3e3589 100644 --- a/net/openvswitch/flow.h +++ b/net/openvswitch/flow.h @@ -32,31 +32,11 @@ #include <linux/time.h> #include <linux/flex_array.h> #include <net/inet_ecn.h> +#include <net/ip_tunnels.h> +#include <net/dst_metadata.h> struct sk_buff; -/* Used to memset ovs_key_ipv4_tunnel padding. */ -#define OVS_TUNNEL_KEY_SIZE \ - (offsetof(struct ovs_key_ipv4_tunnel, tp_dst) + \ - FIELD_SIZEOF(struct ovs_key_ipv4_tunnel, tp_dst)) - -struct ovs_key_ipv4_tunnel { - __be64 tun_id; - __be32 ipv4_src; - __be32 ipv4_dst; - __be16 tun_flags; - u8 ipv4_tos; - u8 ipv4_ttl; - __be16 tp_src; - __be16 tp_dst; -} __packed __aligned(4); /* Minimize padding. */ - -struct ovs_tunnel_info { - struct ovs_key_ipv4_tunnel tunnel; - const void *options; - u8 options_len; -}; - /* Store options at the end of the array if they are less than the * maximum size. This allows us to get the benefits of variable length * matching for small options. @@ -66,54 +46,9 @@ struct ovs_tunnel_info { #define TUN_METADATA_OPTS(flow_key, opt_len) \ ((void *)((flow_key)->tun_opts + TUN_METADATA_OFFSET(opt_len))) -static inline void __ovs_flow_tun_info_init(struct ovs_tunnel_info *tun_info, - __be32 saddr, __be32 daddr, - u8 tos, u8 ttl, - __be16 tp_src, - __be16 tp_dst, - __be64 tun_id, - __be16 tun_flags, - const void *opts, - u8 opts_len) -{ - tun_info->tunnel.tun_id = tun_id; - tun_info->tunnel.ipv4_src = saddr; - tun_info->tunnel.ipv4_dst = daddr; - tun_info->tunnel.ipv4_tos = tos; - tun_info->tunnel.ipv4_ttl = ttl; - tun_info->tunnel.tun_flags = tun_flags; - - /* For the tunnel types on the top of IPsec, the tp_src and tp_dst of - * the upper tunnel are used. - * E.g: GRE over IPSEC, the tp_src and tp_port are zero. - */ - tun_info->tunnel.tp_src = tp_src; - tun_info->tunnel.tp_dst = tp_dst; - - /* Clear struct padding. */ - if (sizeof(tun_info->tunnel) != OVS_TUNNEL_KEY_SIZE) - memset((unsigned char *)&tun_info->tunnel + OVS_TUNNEL_KEY_SIZE, - 0, sizeof(tun_info->tunnel) - OVS_TUNNEL_KEY_SIZE); - - tun_info->options = opts; - tun_info->options_len = opts_len; -} - -static inline void ovs_flow_tun_info_init(struct ovs_tunnel_info *tun_info, - const struct iphdr *iph, - __be16 tp_src, - __be16 tp_dst, - __be64 tun_id, - __be16 tun_flags, - const void *opts, - u8 opts_len) -{ - __ovs_flow_tun_info_init(tun_info, iph->saddr, iph->daddr, - iph->tos, iph->ttl, - tp_src, tp_dst, - tun_id, tun_flags, - opts, opts_len); -} +struct ovs_tunnel_info { + struct metadata_dst *tun_dst; +}; #define OVS_SW_FLOW_KEY_METADATA_SIZE \ (offsetof(struct sw_flow_key, recirc_id) + \ @@ -122,7 +57,7 @@ static inline void ovs_flow_tun_info_init(struct ovs_tunnel_info *tun_info, struct sw_flow_key { u8 tun_opts[255]; u8 tun_opts_len; - struct ovs_key_ipv4_tunnel tun_key; /* Encapsulating tunnel key. */ + struct ip_tunnel_key tun_key; /* Encapsulating tunnel key. */ struct { u32 priority; /* Packet QoS priority. */ u32 skb_mark; /* SKB mark. */ @@ -273,7 +208,7 @@ void ovs_flow_stats_clear(struct sw_flow *); u64 ovs_flow_used_time(unsigned long flow_jiffies); int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key); -int ovs_flow_key_extract(const struct ovs_tunnel_info *tun_info, +int ovs_flow_key_extract(const struct ip_tunnel_info *tun_info, struct sk_buff *skb, struct sw_flow_key *key); /* Extract key from packet coming from userspace. */ diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c index 624e41c4267f..a6eb77ab1a64 100644 --- a/net/openvswitch/flow_netlink.c +++ b/net/openvswitch/flow_netlink.c @@ -47,9 +47,9 @@ #include <net/ipv6.h> #include <net/ndisc.h> #include <net/mpls.h> +#include <net/vxlan.h> #include "flow_netlink.h" -#include "vport-vxlan.h" struct ovs_len_tbl { int len; @@ -475,7 +475,7 @@ static int vxlan_tun_opt_from_nlattr(const struct nlattr *a, { struct nlattr *tb[OVS_VXLAN_EXT_MAX+1]; unsigned long opt_key_offset; - struct ovs_vxlan_opts opts; + struct vxlan_metadata opts; int err; BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts)); @@ -626,7 +626,7 @@ static int ipv4_tun_from_nlattr(const struct nlattr *attr, static int vxlan_opt_to_nlattr(struct sk_buff *skb, const void *tun_opts, int swkey_tun_opts_len) { - const struct ovs_vxlan_opts *opts = tun_opts; + const struct vxlan_metadata *opts = tun_opts; struct nlattr *nla; nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS); @@ -641,7 +641,7 @@ static int vxlan_opt_to_nlattr(struct sk_buff *skb, } static int __ipv4_tun_to_nlattr(struct sk_buff *skb, - const struct ovs_key_ipv4_tunnel *output, + const struct ip_tunnel_key *output, const void *tun_opts, int swkey_tun_opts_len) { if (output->tun_flags & TUNNEL_KEY && @@ -689,7 +689,7 @@ static int __ipv4_tun_to_nlattr(struct sk_buff *skb, } static int ipv4_tun_to_nlattr(struct sk_buff *skb, - const struct ovs_key_ipv4_tunnel *output, + const struct ip_tunnel_key *output, const void *tun_opts, int swkey_tun_opts_len) { struct nlattr *nla; @@ -708,9 +708,9 @@ static int ipv4_tun_to_nlattr(struct sk_buff *skb, } int ovs_nla_put_egress_tunnel_key(struct sk_buff *skb, - const struct ovs_tunnel_info *egress_tun_info) + const struct ip_tunnel_info *egress_tun_info) { - return __ipv4_tun_to_nlattr(skb, &egress_tun_info->tunnel, + return __ipv4_tun_to_nlattr(skb, &egress_tun_info->key, egress_tun_info->options, egress_tun_info->options_len); } @@ -1548,11 +1548,48 @@ static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log) return sfa; } +static void ovs_nla_free_set_action(const struct nlattr *a) +{ + const struct nlattr *ovs_key = nla_data(a); + struct ovs_tunnel_info *ovs_tun; + + switch (nla_type(ovs_key)) { + case OVS_KEY_ATTR_TUNNEL_INFO: + ovs_tun = nla_data(ovs_key); + dst_release((struct dst_entry *)ovs_tun->tun_dst); + break; + } +} + +void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts) +{ + const struct nlattr *a; + int rem; + + if (!sf_acts) + return; + + nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) { + switch (nla_type(a)) { + case OVS_ACTION_ATTR_SET: + ovs_nla_free_set_action(a); + break; + } + } + + kfree(sf_acts); +} + +static void __ovs_nla_free_flow_actions(struct rcu_head *head) +{ + ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu)); +} + /* Schedules 'sf_acts' to be freed after the next RCU grace period. * The caller must hold rcu_read_lock for this to be sensible. */ -void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts) +void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts) { - kfree_rcu(sf_acts, rcu); + call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions); } static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, @@ -1746,7 +1783,9 @@ static int validate_and_copy_set_tun(const struct nlattr *attr, { struct sw_flow_match match; struct sw_flow_key key; - struct ovs_tunnel_info *tun_info; + struct metadata_dst *tun_dst; + struct ip_tunnel_info *tun_info; + struct ovs_tunnel_info *ovs_tun; struct nlattr *a; int err = 0, start, opts_type; @@ -1771,13 +1810,23 @@ static int validate_and_copy_set_tun(const struct nlattr *attr, if (start < 0) return start; + tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL); + if (!tun_dst) + return -ENOMEM; + a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL, - sizeof(*tun_info) + key.tun_opts_len, log); - if (IS_ERR(a)) + sizeof(*ovs_tun), log); + if (IS_ERR(a)) { + dst_release((struct dst_entry *)tun_dst); return PTR_ERR(a); + } + + ovs_tun = nla_data(a); + ovs_tun->tun_dst = tun_dst; - tun_info = nla_data(a); - tun_info->tunnel = key.tun_key; + tun_info = &tun_dst->u.tun_info; + tun_info->mode = IP_TUNNEL_INFO_TX; + tun_info->key = key.tun_key; tun_info->options_len = key.tun_opts_len; if (tun_info->options_len) { @@ -2177,7 +2226,7 @@ int ovs_nla_copy_actions(const struct nlattr *attr, err = __ovs_nla_copy_actions(attr, key, 0, sfa, key->eth.type, key->eth.tci, log); if (err) - kfree(*sfa); + ovs_nla_free_flow_actions(*sfa); return err; } @@ -2227,13 +2276,14 @@ static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) switch (key_type) { case OVS_KEY_ATTR_TUNNEL_INFO: { - struct ovs_tunnel_info *tun_info = nla_data(ovs_key); + struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key); + struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info; start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); if (!start) return -EMSGSIZE; - err = ipv4_tun_to_nlattr(skb, &tun_info->tunnel, + err = ipv4_tun_to_nlattr(skb, &tun_info->key, tun_info->options_len ? tun_info->options : NULL, tun_info->options_len); diff --git a/net/openvswitch/flow_netlink.h b/net/openvswitch/flow_netlink.h index 5c3d75bff310..acd074408f0a 100644 --- a/net/openvswitch/flow_netlink.h +++ b/net/openvswitch/flow_netlink.h @@ -55,7 +55,7 @@ int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb); int ovs_nla_get_match(struct sw_flow_match *, const struct nlattr *key, const struct nlattr *mask, bool log); int ovs_nla_put_egress_tunnel_key(struct sk_buff *, - const struct ovs_tunnel_info *); + const struct ip_tunnel_info *); bool ovs_nla_get_ufid(struct sw_flow_id *, const struct nlattr *, bool log); int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid, @@ -69,5 +69,6 @@ int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb); void ovs_nla_free_flow_actions(struct sw_flow_actions *); +void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *); #endif /* flow_netlink.h */ diff --git a/net/openvswitch/flow_table.c b/net/openvswitch/flow_table.c index 4613df8c8290..b70d845e7efb 100644 --- a/net/openvswitch/flow_table.c +++ b/net/openvswitch/flow_table.c @@ -18,6 +18,7 @@ #include "flow.h" #include "datapath.h" +#include "flow_netlink.h" #include <linux/uaccess.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> @@ -143,7 +144,8 @@ static void flow_free(struct sw_flow *flow) if (ovs_identifier_is_key(&flow->id)) kfree(flow->id.unmasked_key); - kfree((struct sw_flow_actions __force *)flow->sf_acts); + if (flow->sf_acts) + ovs_nla_free_flow_actions((struct sw_flow_actions __force *)flow->sf_acts); for_each_node(node) if (flow->stats[node]) kmem_cache_free(flow_stats_cache, diff --git a/net/openvswitch/vport-geneve.c b/net/openvswitch/vport-geneve.c index 208c576bd1b6..1da3a14d1010 100644 --- a/net/openvswitch/vport-geneve.c +++ b/net/openvswitch/vport-geneve.c @@ -77,7 +77,7 @@ static void geneve_rcv(struct geneve_sock *gs, struct sk_buff *skb) struct vport *vport = gs->rcv_data; struct genevehdr *geneveh = geneve_hdr(skb); int opts_len; - struct ovs_tunnel_info tun_info; + struct ip_tunnel_info tun_info; __be64 key; __be16 flags; @@ -90,10 +90,9 @@ static void geneve_rcv(struct geneve_sock *gs, struct sk_buff *skb) key = vni_to_tunnel_id(geneveh->vni); - ovs_flow_tun_info_init(&tun_info, ip_hdr(skb), - udp_hdr(skb)->source, udp_hdr(skb)->dest, - key, flags, - geneveh->options, opts_len); + ip_tunnel_info_init(&tun_info, ip_hdr(skb), + udp_hdr(skb)->source, udp_hdr(skb)->dest, + key, flags, geneveh->options, opts_len); ovs_vport_receive(vport, skb, &tun_info); } @@ -165,8 +164,8 @@ error: static int geneve_tnl_send(struct vport *vport, struct sk_buff *skb) { - const struct ovs_key_ipv4_tunnel *tun_key; - struct ovs_tunnel_info *tun_info; + const struct ip_tunnel_key *tun_key; + struct ip_tunnel_info *tun_info; struct net *net = ovs_dp_get_net(vport->dp); struct geneve_port *geneve_port = geneve_vport(vport); __be16 dport = inet_sk(geneve_port->gs->sock->sk)->inet_sport; @@ -183,7 +182,7 @@ static int geneve_tnl_send(struct vport *vport, struct sk_buff *skb) goto error; } - tun_key = &tun_info->tunnel; + tun_key = &tun_info->key; rt = ovs_tunnel_route_lookup(net, tun_key, skb->mark, &fl, IPPROTO_UDP); if (IS_ERR(rt)) { err = PTR_ERR(rt); @@ -225,7 +224,7 @@ static const char *geneve_get_name(const struct vport *vport) } static int geneve_get_egress_tun_info(struct vport *vport, struct sk_buff *skb, - struct ovs_tunnel_info *egress_tun_info) + struct ip_tunnel_info *egress_tun_info) { struct geneve_port *geneve_port = geneve_vport(vport); struct net *net = ovs_dp_get_net(vport->dp); diff --git a/net/openvswitch/vport-gre.c b/net/openvswitch/vport-gre.c index f17ac9642f4e..b87656c66aaf 100644 --- a/net/openvswitch/vport-gre.c +++ b/net/openvswitch/vport-gre.c @@ -67,9 +67,9 @@ static struct sk_buff *__build_header(struct sk_buff *skb, int tunnel_hlen) { struct tnl_ptk_info tpi; - const struct ovs_key_ipv4_tunnel *tun_key; + const struct ip_tunnel_key *tun_key; - tun_key = &OVS_CB(skb)->egress_tun_info->tunnel; + tun_key = &OVS_CB(skb)->egress_tun_info->key; skb = gre_handle_offloads(skb, !!(tun_key->tun_flags & TUNNEL_CSUM)); if (IS_ERR(skb)) @@ -97,7 +97,7 @@ static __be64 key_to_tunnel_id(__be32 key, __be32 seq) static int gre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi) { - struct ovs_tunnel_info tun_info; + struct ip_tunnel_info tun_info; struct ovs_net *ovs_net; struct vport *vport; __be64 key; @@ -108,8 +108,8 @@ static int gre_rcv(struct sk_buff *skb, return PACKET_REJECT; key = key_to_tunnel_id(tpi->key, tpi->seq); - ovs_flow_tun_info_init(&tun_info, ip_hdr(skb), 0, 0, key, - filter_tnl_flags(tpi->flags), NULL, 0); + ip_tunnel_info_init(&tun_info, ip_hdr(skb), 0, 0, key, + filter_tnl_flags(tpi->flags), NULL, 0); ovs_vport_receive(vport, skb, &tun_info); return PACKET_RCVD; @@ -134,7 +134,7 @@ static int gre_err(struct sk_buff *skb, u32 info, static int gre_tnl_send(struct vport *vport, struct sk_buff *skb) { struct net *net = ovs_dp_get_net(vport->dp); - const struct ovs_key_ipv4_tunnel *tun_key; + const struct ip_tunnel_key *tun_key; struct flowi4 fl; struct rtable *rt; int min_headroom; @@ -147,7 +147,7 @@ static int gre_tnl_send(struct vport *vport, struct sk_buff *skb) goto err_free_skb; } - tun_key = &OVS_CB(skb)->egress_tun_info->tunnel; + tun_key = &OVS_CB(skb)->egress_tun_info->key; rt = ovs_tunnel_route_lookup(net, tun_key, skb->mark, &fl, IPPROTO_GRE); if (IS_ERR(rt)) { err = PTR_ERR(rt); @@ -277,7 +277,7 @@ static void gre_tnl_destroy(struct vport *vport) } static int gre_get_egress_tun_info(struct vport *vport, struct sk_buff *skb, - struct ovs_tunnel_info *egress_tun_info) + struct ip_tunnel_info *egress_tun_info) { return ovs_tunnel_get_egress_info(egress_tun_info, ovs_dp_get_net(vport->dp), diff --git a/net/openvswitch/vport-internal_dev.c b/net/openvswitch/vport-internal_dev.c index 6a55f7105505..c058bbf876c3 100644 --- a/net/openvswitch/vport-internal_dev.c +++ b/net/openvswitch/vport-internal_dev.c @@ -156,49 +156,44 @@ static void do_setup(struct net_device *netdev) static struct vport *internal_dev_create(const struct vport_parms *parms) { struct vport *vport; - struct netdev_vport *netdev_vport; struct internal_dev *internal_dev; int err; - vport = ovs_vport_alloc(sizeof(struct netdev_vport), - &ovs_internal_vport_ops, parms); + vport = ovs_vport_alloc(0, &ovs_internal_vport_ops, parms); if (IS_ERR(vport)) { err = PTR_ERR(vport); goto error; } - netdev_vport = netdev_vport_priv(vport); - - netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev), - parms->name, NET_NAME_UNKNOWN, - do_setup); - if (!netdev_vport->dev) { + vport->dev = alloc_netdev(sizeof(struct internal_dev), + parms->name, NET_NAME_UNKNOWN, do_setup); + if (!vport->dev) { err = -ENOMEM; goto error_free_vport; } - dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp)); - internal_dev = internal_dev_priv(netdev_vport->dev); + dev_net_set(vport->dev, ovs_dp_get_net(vport->dp)); + internal_dev = internal_dev_priv(vport->dev); internal_dev->vport = vport; /* Restrict bridge port to current netns. */ if (vport->port_no == OVSP_LOCAL) - netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL; + vport->dev->features |= NETIF_F_NETNS_LOCAL; rtnl_lock(); - err = register_netdevice(netdev_vport->dev); + err = register_netdevice(vport->dev); if (err) goto error_free_netdev; - dev_set_promiscuity(netdev_vport->dev, 1); + dev_set_promiscuity(vport->dev, 1); rtnl_unlock(); - netif_start_queue(netdev_vport->dev); + netif_start_queue(vport->dev); return vport; error_free_netdev: rtnl_unlock(); - free_netdev(netdev_vport->dev); + free_netdev(vport->dev); error_free_vport: ovs_vport_free(vport); error: @@ -207,21 +202,19 @@ error: static void internal_dev_destroy(struct vport *vport) { - struct netdev_vport *netdev_vport = netdev_vport_priv(vport); - - netif_stop_queue(netdev_vport->dev); + netif_stop_queue(vport->dev); rtnl_lock(); - dev_set_promiscuity(netdev_vport->dev, -1); + dev_set_promiscuity(vport->dev, -1); /* unregister_netdevice() waits for an RCU grace period. */ - unregister_netdevice(netdev_vport->dev); + unregister_netdevice(vport->dev); rtnl_unlock(); } static int internal_dev_recv(struct vport *vport, struct sk_buff *skb) { - struct net_device *netdev = netdev_vport_priv(vport)->dev; + struct net_device *netdev = vport->dev; int len; if (unlikely(!(netdev->flags & IFF_UP))) { @@ -249,7 +242,6 @@ static struct vport_ops ovs_internal_vport_ops = { .type = OVS_VPORT_TYPE_INTERNAL, .create = internal_dev_create, .destroy = internal_dev_destroy, - .get_name = ovs_netdev_get_name, .send = internal_dev_recv, }; diff --git a/net/openvswitch/vport-netdev.c b/net/openvswitch/vport-netdev.c index 33e6d6e2908f..68d0582fc001 100644 --- a/net/openvswitch/vport-netdev.c +++ b/net/openvswitch/vport-netdev.c @@ -27,9 +27,13 @@ #include <linux/skbuff.h> #include <linux/openvswitch.h> -#include <net/llc.h> +#include <net/udp.h> +#include <net/ip_tunnels.h> +#include <net/rtnetlink.h> +#include <net/vxlan.h> #include "datapath.h" +#include "vport.h" #include "vport-internal_dev.h" #include "vport-netdev.h" @@ -83,104 +87,93 @@ static struct net_device *get_dpdev(const struct datapath *dp) local = ovs_vport_ovsl(dp, OVSP_LOCAL); BUG_ON(!local); - return netdev_vport_priv(local)->dev; + return local->dev; } -static struct vport *netdev_create(const struct vport_parms *parms) +static struct vport *netdev_link(struct vport *vport, const char *name) { - struct vport *vport; - struct netdev_vport *netdev_vport; int err; - vport = ovs_vport_alloc(sizeof(struct netdev_vport), - &ovs_netdev_vport_ops, parms); - if (IS_ERR(vport)) { - err = PTR_ERR(vport); - goto error; - } - - netdev_vport = netdev_vport_priv(vport); - - netdev_vport->dev = dev_get_by_name(ovs_dp_get_net(vport->dp), parms->name); - if (!netdev_vport->dev) { + vport->dev = dev_get_by_name(ovs_dp_get_net(vport->dp), name); + if (!vport->dev) { err = -ENODEV; goto error_free_vport; } - if (netdev_vport->dev->flags & IFF_LOOPBACK || - netdev_vport->dev->type != ARPHRD_ETHER || - ovs_is_internal_dev(netdev_vport->dev)) { + if (vport->dev->flags & IFF_LOOPBACK || + vport->dev->type != ARPHRD_ETHER || + ovs_is_internal_dev(vport->dev)) { err = -EINVAL; goto error_put; } rtnl_lock(); - err = netdev_master_upper_dev_link(netdev_vport->dev, + err = netdev_master_upper_dev_link(vport->dev, get_dpdev(vport->dp)); if (err) goto error_unlock; - err = netdev_rx_handler_register(netdev_vport->dev, netdev_frame_hook, + err = netdev_rx_handler_register(vport->dev, netdev_frame_hook, vport); if (err) goto error_master_upper_dev_unlink; - dev_disable_lro(netdev_vport->dev); - dev_set_promiscuity(netdev_vport->dev, 1); - netdev_vport->dev->priv_flags |= IFF_OVS_DATAPATH; + dev_disable_lro(vport->dev); + dev_set_promiscuity(vport->dev, 1); + vport->dev->priv_flags |= IFF_OVS_DATAPATH; rtnl_unlock(); return vport; error_master_upper_dev_unlink: - netdev_upper_dev_unlink(netdev_vport->dev, get_dpdev(vport->dp)); + netdev_upper_dev_unlink(vport->dev, get_dpdev(vport->dp)); error_unlock: rtnl_unlock(); error_put: - dev_put(netdev_vport->dev); + dev_put(vport->dev); error_free_vport: ovs_vport_free(vport); -error: return ERR_PTR(err); } +static struct vport *netdev_create(const struct vport_parms *parms) +{ + struct vport *vport; + + vport = ovs_vport_alloc(0, &ovs_netdev_vport_ops, parms); + if (IS_ERR(vport)) + return vport; + + return netdev_link(vport, parms->name); +} + static void free_port_rcu(struct rcu_head *rcu) { - struct netdev_vport *netdev_vport = container_of(rcu, - struct netdev_vport, rcu); + struct vport *vport = container_of(rcu, struct vport, rcu); - dev_put(netdev_vport->dev); - ovs_vport_free(vport_from_priv(netdev_vport)); + if (vport->dev) + dev_put(vport->dev); + ovs_vport_free(vport); } void ovs_netdev_detach_dev(struct vport *vport) { - struct netdev_vport *netdev_vport = netdev_vport_priv(vport); - ASSERT_RTNL(); - netdev_vport->dev->priv_flags &= ~IFF_OVS_DATAPATH; - netdev_rx_handler_unregister(netdev_vport->dev); - netdev_upper_dev_unlink(netdev_vport->dev, - netdev_master_upper_dev_get(netdev_vport->dev)); - dev_set_promiscuity(netdev_vport->dev, -1); + vport->dev->priv_flags &= ~IFF_OVS_DATAPATH; + netdev_rx_handler_unregister(vport->dev); + netdev_upper_dev_unlink(vport->dev, + netdev_master_upper_dev_get(vport->dev)); + dev_set_promiscuity(vport->dev, -1); } static void netdev_destroy(struct vport *vport) { - struct netdev_vport *netdev_vport = netdev_vport_priv(vport); - rtnl_lock(); - if (netdev_vport->dev->priv_flags & IFF_OVS_DATAPATH) + if (vport->dev->priv_flags & IFF_OVS_DATAPATH) ovs_netdev_detach_dev(vport); rtnl_unlock(); - call_rcu(&netdev_vport->rcu, free_port_rcu); -} - -const char *ovs_netdev_get_name(const struct vport *vport) -{ - const struct netdev_vport *netdev_vport = netdev_vport_priv(vport); - return netdev_vport->dev->name; + call_rcu(&vport->rcu, free_port_rcu); } static unsigned int packet_length(const struct sk_buff *skb) @@ -195,18 +188,17 @@ static unsigned int packet_length(const struct sk_buff *skb) static int netdev_send(struct vport *vport, struct sk_buff *skb) { - struct netdev_vport *netdev_vport = netdev_vport_priv(vport); - int mtu = netdev_vport->dev->mtu; + int mtu = vport->dev->mtu; int len; if (unlikely(packet_length(skb) > mtu && !skb_is_gso(skb))) { net_warn_ratelimited("%s: dropped over-mtu packet: %d > %d\n", - netdev_vport->dev->name, + vport->dev->name, packet_length(skb), mtu); goto drop; } - skb->dev = netdev_vport->dev; + skb->dev = vport->dev; len = skb->len; dev_queue_xmit(skb); @@ -231,16 +223,205 @@ static struct vport_ops ovs_netdev_vport_ops = { .type = OVS_VPORT_TYPE_NETDEV, .create = netdev_create, .destroy = netdev_destroy, - .get_name = ovs_netdev_get_name, .send = netdev_send, }; +/* Compat code for old userspace. */ +#if IS_ENABLED(CONFIG_VXLAN) +static struct vport_ops ovs_vxlan_netdev_vport_ops; + +static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb) +{ + struct vxlan_dev *vxlan = netdev_priv(vport->dev); + __be16 dst_port = vxlan->cfg.dst_port; + + if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port))) + return -EMSGSIZE; + + if (vxlan->flags & VXLAN_F_GBP) { + struct nlattr *exts; + + exts = nla_nest_start(skb, OVS_TUNNEL_ATTR_EXTENSION); + if (!exts) + return -EMSGSIZE; + + if (vxlan->flags & VXLAN_F_GBP && + nla_put_flag(skb, OVS_VXLAN_EXT_GBP)) + return -EMSGSIZE; + + nla_nest_end(skb, exts); + } + + return 0; +} + +static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = { + [OVS_VXLAN_EXT_GBP] = { .type = NLA_FLAG, }, +}; + +static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr, + struct vxlan_config *conf) +{ + struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1]; + int err; + + if (nla_len(attr) < sizeof(struct nlattr)) + return -EINVAL; + + err = nla_parse_nested(exts, OVS_VXLAN_EXT_MAX, attr, exts_policy); + if (err < 0) + return err; + + if (exts[OVS_VXLAN_EXT_GBP]) + conf->flags |= VXLAN_F_GBP; + + return 0; +} + +static struct vport *vxlan_tnl_create(const struct vport_parms *parms) +{ + struct net *net = ovs_dp_get_net(parms->dp); + struct nlattr *options = parms->options; + struct net_device *dev; + struct vport *vport; + struct nlattr *a; + int err; + struct vxlan_config conf = { + .no_share = true, + .flags = VXLAN_F_FLOW_BASED | VXLAN_F_COLLECT_METADATA, + }; + + if (!options) { + err = -EINVAL; + goto error; + } + + a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT); + if (a && nla_len(a) == sizeof(u16)) { + conf.dst_port = htons(nla_get_u16(a)); + } else { + /* Require destination port from userspace. */ + err = -EINVAL; + goto error; + } + + vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms); + if (IS_ERR(vport)) + return vport; + + a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION); + if (a) { + err = vxlan_configure_exts(vport, a, &conf); + if (err) { + ovs_vport_free(vport); + goto error; + } + } + + rtnl_lock(); + dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf); + if (IS_ERR(dev)) { + rtnl_unlock(); + ovs_vport_free(vport); + return ERR_CAST(dev); + } + + dev_change_flags(dev, dev->flags | IFF_UP); + rtnl_unlock(); + return vport; +error: + return ERR_PTR(err); +} + +static struct vport *vxlan_create(const struct vport_parms *parms) +{ + struct vport *vport; + + vport = vxlan_tnl_create(parms); + if (IS_ERR(vport)) + return vport; + + return netdev_link(vport, parms->name); +} + +static void vxlan_destroy(struct vport *vport) +{ + rtnl_lock(); + if (vport->dev->priv_flags & IFF_OVS_DATAPATH) + ovs_netdev_detach_dev(vport); + + /* Early release so we can unregister the device */ + dev_put(vport->dev); + rtnl_delete_link(vport->dev); + vport->dev = NULL; + rtnl_unlock(); + + call_rcu(&vport->rcu, free_port_rcu); +} + +static int vxlan_get_egress_tun_info(struct vport *vport, struct sk_buff *skb, + struct ip_tunnel_info *egress_tun_info) +{ + struct vxlan_dev *vxlan = netdev_priv(vport->dev); + struct net *net = ovs_dp_get_net(vport->dp); + __be16 dst_port = vxlan_dev_dst_port(vxlan); + __be16 src_port; + int port_min; + int port_max; + + inet_get_local_port_range(net, &port_min, &port_max); + src_port = udp_flow_src_port(net, skb, 0, 0, true); + + return ovs_tunnel_get_egress_info(egress_tun_info, net, + OVS_CB(skb)->egress_tun_info, + IPPROTO_UDP, skb->mark, + src_port, dst_port); +} + +static struct vport_ops ovs_vxlan_netdev_vport_ops = { + .type = OVS_VPORT_TYPE_VXLAN, + .create = vxlan_create, + .destroy = vxlan_destroy, + .get_options = vxlan_get_options, + .send = netdev_send, + .get_egress_tun_info = vxlan_get_egress_tun_info, +}; + +static int vxlan_compat_init(void) +{ + return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops); +} + +static void vxlan_compat_exit(void) +{ + ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops); +} +#else +static int vxlan_compat_init(void) +{ + return 0; +} + +static void vxlan_compat_exit(void) +{ +} +#endif + int __init ovs_netdev_init(void) { - return ovs_vport_ops_register(&ovs_netdev_vport_ops); + int err; + + err = ovs_vport_ops_register(&ovs_netdev_vport_ops); + if (err) + return err; + err = vxlan_compat_init(); + if (err) + vxlan_compat_exit(); + return err; } void ovs_netdev_exit(void) { ovs_vport_ops_unregister(&ovs_netdev_vport_ops); + vxlan_compat_exit(); } diff --git a/net/openvswitch/vport-netdev.h b/net/openvswitch/vport-netdev.h index 6f7038e79c52..684fb88723a4 100644 --- a/net/openvswitch/vport-netdev.h +++ b/net/openvswitch/vport-netdev.h @@ -26,19 +26,6 @@ struct vport *ovs_netdev_get_vport(struct net_device *dev); -struct netdev_vport { - struct rcu_head rcu; - - struct net_device *dev; -}; - -static inline struct netdev_vport * -netdev_vport_priv(const struct vport *vport) -{ - return vport_priv(vport); -} - -const char *ovs_netdev_get_name(const struct vport *); void ovs_netdev_detach_dev(struct vport *); int __init ovs_netdev_init(void); diff --git a/net/openvswitch/vport-vxlan.c b/net/openvswitch/vport-vxlan.c deleted file mode 100644 index 6d39766e7828..000000000000 --- a/net/openvswitch/vport-vxlan.c +++ /dev/null @@ -1,322 +0,0 @@ -/* - * Copyright (c) 2014 Nicira, Inc. - * Copyright (c) 2013 Cisco Systems, Inc. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/in.h> -#include <linux/ip.h> -#include <linux/net.h> -#include <linux/rculist.h> -#include <linux/udp.h> -#include <linux/module.h> - -#include <net/icmp.h> -#include <net/ip.h> -#include <net/udp.h> -#include <net/ip_tunnels.h> -#include <net/rtnetlink.h> -#include <net/route.h> -#include <net/dsfield.h> -#include <net/inet_ecn.h> -#include <net/net_namespace.h> -#include <net/netns/generic.h> -#include <net/vxlan.h> - -#include "datapath.h" -#include "vport.h" -#include "vport-vxlan.h" - -/** - * struct vxlan_port - Keeps track of open UDP ports - * @vs: vxlan_sock created for the port. - * @name: vport name. - */ -struct vxlan_port { - struct vxlan_sock *vs; - char name[IFNAMSIZ]; - u32 exts; /* VXLAN_F_* in <net/vxlan.h> */ -}; - -static struct vport_ops ovs_vxlan_vport_ops; - -static inline struct vxlan_port *vxlan_vport(const struct vport *vport) -{ - return vport_priv(vport); -} - -/* Called with rcu_read_lock and BH disabled. */ -static void vxlan_rcv(struct vxlan_sock *vs, struct sk_buff *skb, - struct vxlan_metadata *md) -{ - struct ovs_tunnel_info tun_info; - struct vxlan_port *vxlan_port; - struct vport *vport = vs->data; - struct iphdr *iph; - struct ovs_vxlan_opts opts = { - .gbp = md->gbp, - }; - __be64 key; - __be16 flags; - - flags = TUNNEL_KEY | (udp_hdr(skb)->check != 0 ? TUNNEL_CSUM : 0); - vxlan_port = vxlan_vport(vport); - if (vxlan_port->exts & VXLAN_F_GBP && md->gbp) - flags |= TUNNEL_VXLAN_OPT; - - /* Save outer tunnel values */ - iph = ip_hdr(skb); - key = cpu_to_be64(ntohl(md->vni) >> 8); - ovs_flow_tun_info_init(&tun_info, iph, - udp_hdr(skb)->source, udp_hdr(skb)->dest, - key, flags, &opts, sizeof(opts)); - - ovs_vport_receive(vport, skb, &tun_info); -} - -static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb) -{ - struct vxlan_port *vxlan_port = vxlan_vport(vport); - __be16 dst_port = inet_sk(vxlan_port->vs->sock->sk)->inet_sport; - - if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port))) - return -EMSGSIZE; - - if (vxlan_port->exts) { - struct nlattr *exts; - - exts = nla_nest_start(skb, OVS_TUNNEL_ATTR_EXTENSION); - if (!exts) - return -EMSGSIZE; - - if (vxlan_port->exts & VXLAN_F_GBP && - nla_put_flag(skb, OVS_VXLAN_EXT_GBP)) - return -EMSGSIZE; - - nla_nest_end(skb, exts); - } - - return 0; -} - -static void vxlan_tnl_destroy(struct vport *vport) -{ - struct vxlan_port *vxlan_port = vxlan_vport(vport); - - vxlan_sock_release(vxlan_port->vs); - - ovs_vport_deferred_free(vport); -} - -static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX+1] = { - [OVS_VXLAN_EXT_GBP] = { .type = NLA_FLAG, }, -}; - -static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr) -{ - struct nlattr *exts[OVS_VXLAN_EXT_MAX+1]; - struct vxlan_port *vxlan_port; - int err; - - if (nla_len(attr) < sizeof(struct nlattr)) - return -EINVAL; - - err = nla_parse_nested(exts, OVS_VXLAN_EXT_MAX, attr, exts_policy); - if (err < 0) - return err; - - vxlan_port = vxlan_vport(vport); - - if (exts[OVS_VXLAN_EXT_GBP]) - vxlan_port->exts |= VXLAN_F_GBP; - - return 0; -} - -static struct vport *vxlan_tnl_create(const struct vport_parms *parms) -{ - struct net *net = ovs_dp_get_net(parms->dp); - struct nlattr *options = parms->options; - struct vxlan_port *vxlan_port; - struct vxlan_sock *vs; - struct vport *vport; - struct nlattr *a; - u16 dst_port; - int err; - - if (!options) { - err = -EINVAL; - goto error; - } - a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT); - if (a && nla_len(a) == sizeof(u16)) { - dst_port = nla_get_u16(a); - } else { - /* Require destination port from userspace. */ - err = -EINVAL; - goto error; - } - - vport = ovs_vport_alloc(sizeof(struct vxlan_port), - &ovs_vxlan_vport_ops, parms); - if (IS_ERR(vport)) - return vport; - - vxlan_port = vxlan_vport(vport); - strncpy(vxlan_port->name, parms->name, IFNAMSIZ); - - a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION); - if (a) { - err = vxlan_configure_exts(vport, a); - if (err) { - ovs_vport_free(vport); - goto error; - } - } - - vs = vxlan_sock_add(net, htons(dst_port), vxlan_rcv, vport, true, - vxlan_port->exts); - if (IS_ERR(vs)) { - ovs_vport_free(vport); - return (void *)vs; - } - vxlan_port->vs = vs; - - return vport; - -error: - return ERR_PTR(err); -} - -static int vxlan_ext_gbp(struct sk_buff *skb) -{ - const struct ovs_tunnel_info *tun_info; - const struct ovs_vxlan_opts *opts; - - tun_info = OVS_CB(skb)->egress_tun_info; - opts = tun_info->options; - - if (tun_info->tunnel.tun_flags & TUNNEL_VXLAN_OPT && - tun_info->options_len >= sizeof(*opts)) - return opts->gbp; - else - return 0; -} - -static int vxlan_tnl_send(struct vport *vport, struct sk_buff *skb) -{ - struct net *net = ovs_dp_get_net(vport->dp); - struct vxlan_port *vxlan_port = vxlan_vport(vport); - struct sock *sk = vxlan_port->vs->sock->sk; - __be16 dst_port = inet_sk(sk)->inet_sport; - const struct ovs_key_ipv4_tunnel *tun_key; - struct vxlan_metadata md = {0}; - struct rtable *rt; - struct flowi4 fl; - __be16 src_port; - __be16 df; - int err; - u32 vxflags; - - if (unlikely(!OVS_CB(skb)->egress_tun_info)) { - err = -EINVAL; - goto error; - } - - tun_key = &OVS_CB(skb)->egress_tun_info->tunnel; - rt = ovs_tunnel_route_lookup(net, tun_key, skb->mark, &fl, IPPROTO_UDP); - if (IS_ERR(rt)) { - err = PTR_ERR(rt); - goto error; - } - - df = tun_key->tun_flags & TUNNEL_DONT_FRAGMENT ? - htons(IP_DF) : 0; - - skb->ignore_df = 1; - - src_port = udp_flow_src_port(net, skb, 0, 0, true); - md.vni = htonl(be64_to_cpu(tun_key->tun_id) << 8); - md.gbp = vxlan_ext_gbp(skb); - vxflags = vxlan_port->exts | - (tun_key->tun_flags & TUNNEL_CSUM ? VXLAN_F_UDP_CSUM : 0); - - err = vxlan_xmit_skb(rt, sk, skb, fl.saddr, tun_key->ipv4_dst, - tun_key->ipv4_tos, tun_key->ipv4_ttl, df, - src_port, dst_port, - &md, false, vxflags); - if (err < 0) - ip_rt_put(rt); - return err; -error: - kfree_skb(skb); - return err; -} - -static int vxlan_get_egress_tun_info(struct vport *vport, struct sk_buff *skb, - struct ovs_tunnel_info *egress_tun_info) -{ - struct net *net = ovs_dp_get_net(vport->dp); - struct vxlan_port *vxlan_port = vxlan_vport(vport); - __be16 dst_port = inet_sk(vxlan_port->vs->sock->sk)->inet_sport; - __be16 src_port; - int port_min; - int port_max; - - inet_get_local_port_range(net, &port_min, &port_max); - src_port = udp_flow_src_port(net, skb, 0, 0, true); - - return ovs_tunnel_get_egress_info(egress_tun_info, net, - OVS_CB(skb)->egress_tun_info, - IPPROTO_UDP, skb->mark, - src_port, dst_port); -} - -static const char *vxlan_get_name(const struct vport *vport) -{ - struct vxlan_port *vxlan_port = vxlan_vport(vport); - return vxlan_port->name; -} - -static struct vport_ops ovs_vxlan_vport_ops = { - .type = OVS_VPORT_TYPE_VXLAN, - .create = vxlan_tnl_create, - .destroy = vxlan_tnl_destroy, - .get_name = vxlan_get_name, - .get_options = vxlan_get_options, - .send = vxlan_tnl_send, - .get_egress_tun_info = vxlan_get_egress_tun_info, - .owner = THIS_MODULE, -}; - -static int __init ovs_vxlan_tnl_init(void) -{ - return ovs_vport_ops_register(&ovs_vxlan_vport_ops); -} - -static void __exit ovs_vxlan_tnl_exit(void) -{ - ovs_vport_ops_unregister(&ovs_vxlan_vport_ops); -} - -module_init(ovs_vxlan_tnl_init); -module_exit(ovs_vxlan_tnl_exit); - -MODULE_DESCRIPTION("OVS: VXLAN switching port"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("vport-type-4"); diff --git a/net/openvswitch/vport-vxlan.h b/net/openvswitch/vport-vxlan.h deleted file mode 100644 index 4b08233e73d5..000000000000 --- a/net/openvswitch/vport-vxlan.h +++ /dev/null @@ -1,11 +0,0 @@ -#ifndef VPORT_VXLAN_H -#define VPORT_VXLAN_H 1 - -#include <linux/kernel.h> -#include <linux/types.h> - -struct ovs_vxlan_opts { - __u32 gbp; -}; - -#endif diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c index 067a3fff1d2c..d14f59403c5e 100644 --- a/net/openvswitch/vport.c +++ b/net/openvswitch/vport.c @@ -113,7 +113,7 @@ struct vport *ovs_vport_locate(const struct net *net, const char *name) struct vport *vport; hlist_for_each_entry_rcu(vport, bucket, hash_node) - if (!strcmp(name, vport->ops->get_name(vport)) && + if (!strcmp(name, ovs_vport_name(vport)) && net_eq(ovs_dp_get_net(vport->dp), net)) return vport; @@ -226,7 +226,7 @@ struct vport *ovs_vport_add(const struct vport_parms *parms) } bucket = hash_bucket(ovs_dp_get_net(vport->dp), - vport->ops->get_name(vport)); + ovs_vport_name(vport)); hlist_add_head_rcu(&vport->hash_node, bucket); return vport; } @@ -469,7 +469,7 @@ u32 ovs_vport_find_upcall_portid(const struct vport *vport, struct sk_buff *skb) * skb->data should point to the Ethernet header. */ void ovs_vport_receive(struct vport *vport, struct sk_buff *skb, - const struct ovs_tunnel_info *tun_info) + const struct ip_tunnel_info *tun_info) { struct pcpu_sw_netstats *stats; struct sw_flow_key key; @@ -572,22 +572,22 @@ void ovs_vport_deferred_free(struct vport *vport) } EXPORT_SYMBOL_GPL(ovs_vport_deferred_free); -int ovs_tunnel_get_egress_info(struct ovs_tunnel_info *egress_tun_info, +int ovs_tunnel_get_egress_info(struct ip_tunnel_info *egress_tun_info, struct net *net, - const struct ovs_tunnel_info *tun_info, + const struct ip_tunnel_info *tun_info, u8 ipproto, u32 skb_mark, __be16 tp_src, __be16 tp_dst) { - const struct ovs_key_ipv4_tunnel *tun_key; + const struct ip_tunnel_key *tun_key; struct rtable *rt; struct flowi4 fl; if (unlikely(!tun_info)) return -EINVAL; - tun_key = &tun_info->tunnel; + tun_key = &tun_info->key; /* Route lookup to get srouce IP address. * The process may need to be changed if the corresponding process @@ -602,22 +602,22 @@ int ovs_tunnel_get_egress_info(struct ovs_tunnel_info *egress_tun_info, /* Generate egress_tun_info based on tun_info, * saddr, tp_src and tp_dst */ - __ovs_flow_tun_info_init(egress_tun_info, - fl.saddr, tun_key->ipv4_dst, - tun_key->ipv4_tos, - tun_key->ipv4_ttl, - tp_src, tp_dst, - tun_key->tun_id, - tun_key->tun_flags, - tun_info->options, - tun_info->options_len); + __ip_tunnel_info_init(egress_tun_info, + fl.saddr, tun_key->ipv4_dst, + tun_key->ipv4_tos, + tun_key->ipv4_ttl, + tp_src, tp_dst, + tun_key->tun_id, + tun_key->tun_flags, + tun_info->options, + tun_info->options_len); return 0; } EXPORT_SYMBOL_GPL(ovs_tunnel_get_egress_info); int ovs_vport_get_egress_tun_info(struct vport *vport, struct sk_buff *skb, - struct ovs_tunnel_info *info) + struct ip_tunnel_info *info) { /* get_egress_tun_info() is only implemented on tunnel ports. */ if (unlikely(!vport->ops->get_egress_tun_info)) diff --git a/net/openvswitch/vport.h b/net/openvswitch/vport.h index bc85331a6c60..1a689c28b5a6 100644 --- a/net/openvswitch/vport.h +++ b/net/openvswitch/vport.h @@ -27,6 +27,7 @@ #include <linux/skbuff.h> #include <linux/spinlock.h> #include <linux/u64_stats_sync.h> +#include <net/route.h> #include "datapath.h" @@ -58,15 +59,15 @@ u32 ovs_vport_find_upcall_portid(const struct vport *, struct sk_buff *); int ovs_vport_send(struct vport *, struct sk_buff *); -int ovs_tunnel_get_egress_info(struct ovs_tunnel_info *egress_tun_info, +int ovs_tunnel_get_egress_info(struct ip_tunnel_info *egress_tun_info, struct net *net, - const struct ovs_tunnel_info *tun_info, + const struct ip_tunnel_info *tun_info, u8 ipproto, u32 skb_mark, __be16 tp_src, __be16 tp_dst); int ovs_vport_get_egress_tun_info(struct vport *vport, struct sk_buff *skb, - struct ovs_tunnel_info *info); + struct ip_tunnel_info *info); /* The following definitions are for implementers of vport devices: */ @@ -106,7 +107,7 @@ struct vport_portids { * @detach_list: list used for detaching vport in net-exit call. */ struct vport { - struct rcu_head rcu; + struct net_device *dev; struct datapath *dp; struct vport_portids __rcu *upcall_portids; u16 port_no; @@ -119,6 +120,7 @@ struct vport { struct vport_err_stats err_stats; struct list_head detach_list; + struct rcu_head rcu; }; /** @@ -176,7 +178,7 @@ struct vport_ops { int (*send)(struct vport *, struct sk_buff *); int (*get_egress_tun_info)(struct vport *, struct sk_buff *, - struct ovs_tunnel_info *); + struct ip_tunnel_info *); struct module *owner; struct list_head list; @@ -226,7 +228,7 @@ static inline struct vport *vport_from_priv(void *priv) } void ovs_vport_receive(struct vport *, struct sk_buff *, - const struct ovs_tunnel_info *); + const struct ip_tunnel_info *); static inline void ovs_skb_postpush_rcsum(struct sk_buff *skb, const void *start, unsigned int len) @@ -235,11 +237,16 @@ static inline void ovs_skb_postpush_rcsum(struct sk_buff *skb, skb->csum = csum_add(skb->csum, csum_partial(start, len, 0)); } +static inline const char *ovs_vport_name(struct vport *vport) +{ + return vport->dev ? vport->dev->name : vport->ops->get_name(vport); +} + int ovs_vport_ops_register(struct vport_ops *ops); void ovs_vport_ops_unregister(struct vport_ops *ops); static inline struct rtable *ovs_tunnel_route_lookup(struct net *net, - const struct ovs_key_ipv4_tunnel *key, + const struct ip_tunnel_key *key, u32 mark, struct flowi4 *fl, u8 protocol) |