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Date: Wed, 21 Oct 2015 10:52:43 +0900
From: YOSHIFUJI Hideaki/吉藤英明
<hideaki.yoshifuji@...aclelinux.com>
To: "John W. Linville" <linville@...driver.com>, netdev@...r.kernel.org
Cc: hideaki.yoshifuji@...aclelinux.com,
Dave Miller <davem@...emloft.net>,
Pravin B Shelar <pshelar@...ira.com>,
Jesse Gross <jesse@...ira.com>, Jiri Benc <jbenc@...hat.com>
Subject: Re: [PATCH v4 1/2] geneve: implement support for IPv6-based tunnels
Hi,
John W. Linville wrote:
> Signed-off-by: John W. Linville <linville@...driver.com>
> ---
> v4:
> - treat mode field of ip_tunnel_info as flags
> - add a missing IS_ENABLED(CONFIG_IPV6) to geneve_rx
> - remove unneeded flags field in geneve_dev
> - NULL-check parameter for __geneve_sock_release
> - check remote socket family for AF_UNSPEC in geneve_configure
> - rename geneve_get_{rt,dst} as geneve_get_{v4_rt,v6_dst}
> - refactor some error handling in the xmit paths
>
> v3:
> - declare geneve_remote_unspec as static
>
> v2:
> - do not require remote address for tx on metadata tunnels
> - pass correct sockaddr family to udp_tun_rx_dst in geneve_rx
> - accommodate both ipv4 and ipv6 sockets open on same tunnel
> - move declaration of geneve_get_dst for aesthetic purposes
>
> drivers/net/geneve.c | 459 +++++++++++++++++++++++++++++++++++--------
> include/uapi/linux/if_link.h | 1 +
> 2 files changed, 377 insertions(+), 83 deletions(-)
>
> diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c
> index 8f5c02eed47d..217b472ab9e7 100644
> --- a/drivers/net/geneve.c
> +++ b/drivers/net/geneve.c
> @@ -46,16 +46,25 @@ struct geneve_net {
>
> static int geneve_net_id;
>
> +union geneve_addr {
> + struct sockaddr_in sin;
> + struct sockaddr_in6 sin6;
> + struct sockaddr sa;
> +};
> +
> +static union geneve_addr geneve_remote_unspec = { .sa.sa_family = AF_UNSPEC, };
> +
> /* Pseudo network device */
> struct geneve_dev {
> struct hlist_node hlist; /* vni hash table */
> struct net *net; /* netns for packet i/o */
> struct net_device *dev; /* netdev for geneve tunnel */
> - struct geneve_sock *sock; /* socket used for geneve tunnel */
> + struct geneve_sock *sock4; /* IPv4 socket used for geneve tunnel */
> + struct geneve_sock *sock6; /* IPv6 socket used for geneve tunnel */
> u8 vni[3]; /* virtual network ID for tunnel */
> u8 ttl; /* TTL override */
> u8 tos; /* TOS override */
> - struct sockaddr_in remote; /* IPv4 address for link partner */
> + union geneve_addr remote; /* IP address for link partner */
> struct list_head next; /* geneve's per namespace list */
> __be16 dst_port;
> bool collect_md;
> @@ -103,11 +112,32 @@ static struct geneve_dev *geneve_lookup(struct geneve_sock *gs,
> vni_list_head = &gs->vni_list[hash];
> hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) {
> if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
> - addr == geneve->remote.sin_addr.s_addr)
> + addr == geneve->remote.sin.sin_addr.s_addr)
> + return geneve;
> + }
> + return NULL;
> +}
> +
> +#if IS_ENABLED(CONFIG_IPV6)
> +static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs,
> + struct in6_addr addr6, u8 vni[])
> +{
> + struct hlist_head *vni_list_head;
> + struct geneve_dev *geneve;
> + __u32 hash;
> +
> + /* Find the device for this VNI */
> + hash = geneve_net_vni_hash(vni);
> + vni_list_head = &gs->vni_list[hash];
> + hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) {
> + if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
> + !memcmp(&addr6, &geneve->remote.sin6.sin6_addr,
> + sizeof(addr6)))
Please use ipv6_addr_equal().
How do you handle link-local addresses here?
> return geneve;
> }
> return NULL;
> }
> +#endif
>
> static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb)
> {
> @@ -121,24 +151,49 @@ static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb)
> struct metadata_dst *tun_dst = NULL;
> struct geneve_dev *geneve = NULL;
> struct pcpu_sw_netstats *stats;
> - struct iphdr *iph;
> - u8 *vni;
> + struct iphdr *iph = NULL;
> __be32 addr;
> - int err;
> + static u8 zero_vni[3];
> + u8 *vni;
> + int err = 0;
> + sa_family_t sa_family;
> +#if IS_ENABLED(CONFIG_IPV6)
> + struct ipv6hdr *ip6h = NULL;
> + struct in6_addr addr6;
> + static struct in6_addr zero_addr6;
> +#endif
>
> - iph = ip_hdr(skb); /* outer IP header... */
> + sa_family = gs->sock->sk->sk_family;
>
> - if (gs->collect_md) {
> - static u8 zero_vni[3];
> + if (sa_family == AF_INET) {
> + iph = ip_hdr(skb); /* outer IP header... */
>
> - vni = zero_vni;
> - addr = 0;
> - } else {
> - vni = gnvh->vni;
> - addr = iph->saddr;
> - }
> + if (gs->collect_md) {
> + vni = zero_vni;
> + addr = 0;
> + } else {
> + vni = gnvh->vni;
> +
> + addr = iph->saddr;
> + }
> +
> + geneve = geneve_lookup(gs, addr, vni);
> +#if IS_ENABLED(CONFIG_IPV6)
> + } else if (sa_family == AF_INET6) {
> + ip6h = ipv6_hdr(skb); /* outer IPv6 header... */
> +
> + if (gs->collect_md) {
> + vni = zero_vni;
> + addr6 = zero_addr6;
> + } else {
> + vni = gnvh->vni;
>
> - geneve = geneve_lookup(gs, addr, vni);
> + addr6 = ip6h->saddr;
> + }
> +
> + geneve = geneve6_lookup(gs, addr6, vni);
> +#endif
> + }
> if (!geneve)
> goto drop;
>
> @@ -149,7 +204,7 @@ static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb)
> (gnvh->oam ? TUNNEL_OAM : 0) |
> (gnvh->critical ? TUNNEL_CRIT_OPT : 0);
>
> - tun_dst = udp_tun_rx_dst(skb, AF_INET, flags,
> + tun_dst = udp_tun_rx_dst(skb, sa_family, flags,
> vni_to_tunnel_id(gnvh->vni),
> gnvh->opt_len * 4);
> if (!tun_dst)
> @@ -179,12 +234,21 @@ static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb)
>
> skb_reset_network_header(skb);
>
> - err = IP_ECN_decapsulate(iph, skb);
> + if (iph)
> + err = IP_ECN_decapsulate(iph, skb);
> + if (ip6h)
> + err = IP6_ECN_decapsulate(ip6h, skb);
>
> if (unlikely(err)) {
> - if (log_ecn_error)
> - net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
> - &iph->saddr, iph->tos);
> + if (log_ecn_error) {
> + if (iph)
> + net_info_ratelimited("non-ECT from %pI4 "
> + "with TOS=%#x\n",
> + &iph->saddr, iph->tos);
> + if (ip6h)
> + net_info_ratelimited("non-ECT from %pI6\n",
> + &ip6h->saddr);
> + }
> if (err > 1) {
> ++geneve->dev->stats.rx_frame_errors;
> ++geneve->dev->stats.rx_errors;
> @@ -284,6 +348,7 @@ static struct socket *geneve_create_sock(struct net *net, bool ipv6,
>
> if (ipv6) {
> udp_conf.family = AF_INET6;
> + udp_conf.ipv6_v6only = 1;
> } else {
> udp_conf.family = AF_INET;
> udp_conf.local_ip.s_addr = htonl(INADDR_ANY);
> @@ -458,9 +523,9 @@ static void geneve_notify_del_rx_port(struct geneve_sock *gs)
> udp_del_offload(&gs->udp_offloads);
> }
>
> -static void geneve_sock_release(struct geneve_sock *gs)
> +static void __geneve_sock_release(struct geneve_sock *gs)
> {
> - if (--gs->refcnt)
> + if (!gs || --gs->refcnt)
> return;
>
> list_del(&gs->list);
> @@ -469,58 +534,107 @@ static void geneve_sock_release(struct geneve_sock *gs)
> kfree_rcu(gs, rcu);
> }
>
> +static void geneve_sock_release(struct geneve_dev *geneve)
> +{
> + __geneve_sock_release(geneve->sock4);
> +#if IS_ENABLED(CONFIG_IPV6)
> + __geneve_sock_release(geneve->sock6);
> +#endif
> +}
> +
> static struct geneve_sock *geneve_find_sock(struct geneve_net *gn,
> + sa_family_t family,
> __be16 dst_port)
> {
> struct geneve_sock *gs;
>
> list_for_each_entry(gs, &gn->sock_list, list) {
> if (inet_sk(gs->sock->sk)->inet_sport == dst_port &&
> - inet_sk(gs->sock->sk)->sk.sk_family == AF_INET) {
> + inet_sk(gs->sock->sk)->sk.sk_family == family) {
> return gs;
> }
> }
> return NULL;
> }
>
> -static int geneve_open(struct net_device *dev)
> +static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6)
> {
> - struct geneve_dev *geneve = netdev_priv(dev);
> struct net *net = geneve->net;
> struct geneve_net *gn = net_generic(net, geneve_net_id);
> struct geneve_sock *gs;
> __u32 hash;
>
> - gs = geneve_find_sock(gn, geneve->dst_port);
> + gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->dst_port);
> if (gs) {
> gs->refcnt++;
> goto out;
> }
>
> - gs = geneve_socket_create(net, geneve->dst_port, false);
> + gs = geneve_socket_create(net, geneve->dst_port, ipv6);
> if (IS_ERR(gs))
> return PTR_ERR(gs);
>
> out:
> gs->collect_md = geneve->collect_md;
> - geneve->sock = gs;
> +#if IS_ENABLED(CONFIG_IPV6)
> + if (ipv6)
> + geneve->sock6 = gs;
> + else
> +#endif
> + geneve->sock4 = gs;
>
> hash = geneve_net_vni_hash(geneve->vni);
> hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]);
> return 0;
> }
>
> +static int geneve_open(struct net_device *dev)
> +{
> + struct geneve_dev *geneve = netdev_priv(dev);
> + bool ipv6 = geneve->remote.sa.sa_family == AF_INET6;
> + bool metadata = !!geneve->collect_md;
> + int ret = 0;
> +
> + geneve->sock4 = NULL;
> +#if IS_ENABLED(CONFIG_IPV6)
> + geneve->sock6 = NULL;
> + if (ipv6 || metadata)
> + ret = geneve_sock_add(geneve, true);
> +#endif
> + if (!ret && (!ipv6 || metadata))
> + ret = geneve_sock_add(geneve, false);
> + if (ret < 0)
> + geneve_sock_release(geneve);
> +
> + return ret;
> +}
> +
> static int geneve_stop(struct net_device *dev)
> {
> struct geneve_dev *geneve = netdev_priv(dev);
> - struct geneve_sock *gs = geneve->sock;
>
> if (!hlist_unhashed(&geneve->hlist))
> hlist_del_rcu(&geneve->hlist);
> - geneve_sock_release(gs);
> + geneve_sock_release(geneve);
> return 0;
> }
>
> +static void geneve_build_header(struct genevehdr *geneveh,
> + __be16 tun_flags, u8 vni[3],
> + u8 options_len, u8 *options)
> +{
> + geneveh->ver = GENEVE_VER;
> + geneveh->opt_len = options_len / 4;
> + geneveh->oam = !!(tun_flags & TUNNEL_OAM);
> + geneveh->critical = !!(tun_flags & TUNNEL_CRIT_OPT);
> + geneveh->rsvd1 = 0;
> + memcpy(geneveh->vni, vni, 3);
> + geneveh->proto_type = htons(ETH_P_TEB);
> + geneveh->rsvd2 = 0;
> +
> + memcpy(geneveh->options, options, options_len);
> +}
> +
> static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb,
> __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt,
> bool csum)
> @@ -544,15 +658,7 @@ static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb,
> }
>
> gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len);
> - gnvh->ver = GENEVE_VER;
> - gnvh->opt_len = opt_len / 4;
> - gnvh->oam = !!(tun_flags & TUNNEL_OAM);
> - gnvh->critical = !!(tun_flags & TUNNEL_CRIT_OPT);
> - gnvh->rsvd1 = 0;
> - memcpy(gnvh->vni, vni, 3);
> - gnvh->proto_type = htons(ETH_P_TEB);
> - gnvh->rsvd2 = 0;
> - memcpy(gnvh->options, opt, opt_len);
> + geneve_build_header(gnvh, tun_flags, vni, opt_len, opt);
>
> skb_set_inner_protocol(skb, htons(ETH_P_TEB));
> return 0;
> @@ -562,10 +668,47 @@ free_rt:
> return err;
> }
>
> -static struct rtable *geneve_get_rt(struct sk_buff *skb,
> - struct net_device *dev,
> - struct flowi4 *fl4,
> - struct ip_tunnel_info *info)
> +#if IS_ENABLED(CONFIG_IPV6)
> +static int geneve6_build_skb(struct dst_entry *dst, struct sk_buff *skb,
> + __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt,
> + bool csum, bool xnet)
> +{
> + struct genevehdr *gnvh;
> + int min_headroom;
> + int err;
> +
> + skb_scrub_packet(skb, xnet);
> +
> + min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
> + + GENEVE_BASE_HLEN + opt_len + sizeof(struct ipv6hdr);
> + err = skb_cow_head(skb, min_headroom);
> + if (unlikely(err)) {
> + kfree_skb(skb);
> + goto free_dst;
> + }
> +
> + skb = udp_tunnel_handle_offloads(skb, csum);
> + if (IS_ERR(skb)) {
> + err = PTR_ERR(skb);
> + goto free_dst;
> + }
> +
> + gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len);
> + geneve_build_header(gnvh, tun_flags, vni, opt_len, opt);
> +
> + skb_set_inner_protocol(skb, htons(ETH_P_TEB));
> + return 0;
> +
> +free_dst:
> + dst_release(dst);
> + return err;
> +}
> +#endif
> +
> +static struct rtable *geneve_get_v4_rt(struct sk_buff *skb,
> + struct net_device *dev,
> + struct flowi4 *fl4,
> + struct ip_tunnel_info *info)
> {
> struct geneve_dev *geneve = netdev_priv(dev);
> struct rtable *rt = NULL;
> @@ -588,24 +731,42 @@ static struct rtable *geneve_get_rt(struct sk_buff *skb,
> }
>
> fl4->flowi4_tos = RT_TOS(tos);
> - fl4->daddr = geneve->remote.sin_addr.s_addr;
> + fl4->daddr = geneve->remote.sin.sin_addr.s_addr;
> }
>
> rt = ip_route_output_key(geneve->net, fl4);
> - if (IS_ERR(rt)) {
> - netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr);
> - dev->stats.tx_carrier_errors++;
> - return rt;
> - }
> - if (rt->dst.dev == dev) { /* is this necessary? */
> - netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr);
> - dev->stats.collisions++;
> - ip_rt_put(rt);
> - return ERR_PTR(-EINVAL);
> - }
> +
> return rt;
> }
>
> +#if IS_ENABLED(CONFIG_IPV6)
> +static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb,
> + struct net_device *dev,
> + struct flowi6 *fl6,
> + struct ip_tunnel_info *info)
> +{
> + struct geneve_dev *geneve = netdev_priv(dev);
> + struct geneve_sock *gs6 = geneve->sock6;
> + struct dst_entry *dst = NULL;
> +
> + memset(fl6, 0, sizeof(*fl6));
> + fl6->flowi6_mark = skb->mark;
> + fl6->flowi6_proto = IPPROTO_UDP;
> +
> + if (info) {
> + fl6->daddr = info->key.u.ipv6.dst;
> + fl6->saddr = info->key.u.ipv6.src;
> + } else {
> + fl6->daddr = geneve->remote.sin6.sin6_addr;
> + }
> +
> + if (ipv6_stub->ipv6_dst_lookup(geneve->net, gs6->sock->sk, &dst, fl6))
> + return ERR_PTR(-EHOSTUNREACH);
> +
> + return dst;
> +}
> +#endif
> +
> /* Convert 64 bit tunnel ID to 24 bit VNI. */
> static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni)
> {
> @@ -620,11 +781,11 @@ static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni)
> #endif
> }
>
> -static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
> +static netdev_tx_t geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
> + struct ip_tunnel_info *info)
> {
> struct geneve_dev *geneve = netdev_priv(dev);
> - struct geneve_sock *gs = geneve->sock;
> - struct ip_tunnel_info *info = NULL;
> + struct geneve_sock *gs4 = geneve->sock4;
> struct rtable *rt = NULL;
> const struct iphdr *iip; /* interior IP header */
> struct flowi4 fl4;
> @@ -635,7 +796,6 @@ static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
> int err;
>
> if (geneve->collect_md) {
> - info = skb_tunnel_info(skb);
> if (unlikely(info && !(info->mode & IP_TUNNEL_INFO_TX))) {
> netdev_dbg(dev, "no tunnel metadata\n");
> goto tx_error;
> @@ -644,12 +804,18 @@ static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
> goto tx_error;
> }
>
> - rt = geneve_get_rt(skb, dev, &fl4, info);
> + rt = geneve_get_v4_rt(skb, dev, &fl4, info);
> if (IS_ERR(rt)) {
> netdev_dbg(dev, "no route to %pI4\n", &fl4.daddr);
> dev->stats.tx_carrier_errors++;
> goto tx_error;
> }
> + if (rt->dst.dev == dev) { /* is this necessary? */
> + netdev_dbg(dev, "circular route to %pI4\n", &fl4.daddr);
> + dev->stats.collisions++;
> + ip_rt_put(rt);
> + goto tx_error;
> + }
>
> sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
> skb_reset_mac_header(skb);
> @@ -688,7 +854,7 @@ static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
> ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
> df = 0;
> }
> - err = udp_tunnel_xmit_skb(rt, gs->sock->sk, skb, fl4.saddr, fl4.daddr,
> + err = udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr,
> tos, ttl, df, sport, geneve->dst_port,
> !net_eq(geneve->net, dev_net(geneve->dev)),
> !udp_csum);
> @@ -703,6 +869,103 @@ err:
> return NETDEV_TX_OK;
> }
>
> +#if IS_ENABLED(CONFIG_IPV6)
> +static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
> + struct ip_tunnel_info *info)
> +{
> + struct geneve_dev *geneve = netdev_priv(dev);
> + struct geneve_sock *gs6 = geneve->sock6;
> + struct dst_entry *dst = NULL;
> + struct flowi6 fl6;
> + __u8 ttl;
> + __be16 sport;
> + bool udp_csum;
> + int err;
> + bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
> +
> + if (geneve->collect_md) {
> + if (unlikely(info && !(info->mode & IP_TUNNEL_INFO_TX))) {
> + netdev_dbg(dev, "no tunnel metadata\n");
> + goto tx_error;
> + }
> + }
> +
> + dst = geneve_get_v6_dst(skb, dev, &fl6, info);
> + if (IS_ERR(dst)) {
> + netdev_dbg(dev, "no route to %pI6\n", &fl6.daddr);
> + dev->stats.tx_carrier_errors++;
> + goto tx_error;
> + }
> + if (dst->dev == dev) { /* is this necessary? */
> + netdev_dbg(dev, "circular route to %pI6\n", &fl6.daddr);
> + dev->stats.collisions++;
> + dst_release(dst);
> + goto tx_error;
> + }
> +
> + sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
> + skb_reset_mac_header(skb);
> +
> + if (info) {
> + const struct ip_tunnel_key *key = &info->key;
> + u8 *opts = NULL;
> + u8 vni[3];
> +
> + tunnel_id_to_vni(key->tun_id, vni);
> + if (key->tun_flags & TUNNEL_GENEVE_OPT)
> + opts = ip_tunnel_info_opts(info);
> +
> + udp_csum = !!(key->tun_flags & TUNNEL_CSUM);
> + err = geneve6_build_skb(dst, skb, key->tun_flags, vni,
> + info->options_len, opts,
> + udp_csum, xnet);
> + if (unlikely(err))
> + goto err;
> +
> + ttl = key->ttl;
> + } else {
> + udp_csum = false;
> + err = geneve6_build_skb(dst, skb, 0, geneve->vni,
> + 0, NULL, udp_csum, xnet);
> + if (unlikely(err))
> + goto err;
> +
> + ttl = geneve->ttl;
> + if (!ttl && ipv6_addr_is_multicast(&fl6.daddr))
> + ttl = 1;
> + ttl = ttl ? : ip6_dst_hoplimit(dst);
> + }
> + err = udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev,
> + &fl6.saddr, &fl6.daddr, 0, ttl,
> + sport, geneve->dst_port, !udp_csum);
> +
> + iptunnel_xmit_stats(err, &dev->stats, dev->tstats);
> + return NETDEV_TX_OK;
> +
> +tx_error:
> + dev_kfree_skb(skb);
> +err:
> + dev->stats.tx_errors++;
> + return NETDEV_TX_OK;
> +}
> +#endif
> +
> +static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
> +{
> + struct geneve_dev *geneve = netdev_priv(dev);
> + struct ip_tunnel_info *info = NULL;
> +
> + if (geneve->collect_md)
> + info = skb_tunnel_info(skb);
> +
> +#if IS_ENABLED(CONFIG_IPV6)
> + if ((info && ip_tunnel_info_af(info) == AF_INET6) ||
> + (!info && geneve->remote.sa.sa_family == AF_INET6))
> + return geneve6_xmit_skb(skb, dev, info);
> +#endif
> + return geneve_xmit_skb(skb, dev, info);
> +}
> +
> static const struct net_device_ops geneve_netdev_ops = {
> .ndo_init = geneve_init,
> .ndo_uninit = geneve_uninit,
> @@ -759,6 +1022,7 @@ static void geneve_setup(struct net_device *dev)
> static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = {
> [IFLA_GENEVE_ID] = { .type = NLA_U32 },
> [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
> + [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) },
> [IFLA_GENEVE_TTL] = { .type = NLA_U8 },
> [IFLA_GENEVE_TOS] = { .type = NLA_U8 },
> [IFLA_GENEVE_PORT] = { .type = NLA_U16 },
> @@ -790,7 +1054,7 @@ static int geneve_validate(struct nlattr *tb[], struct nlattr *data[])
>
> static struct geneve_dev *geneve_find_dev(struct geneve_net *gn,
> __be16 dst_port,
> - __be32 rem_addr,
> + union geneve_addr *remote,
> u8 vni[],
> bool *tun_on_same_port,
> bool *tun_collect_md)
> @@ -806,7 +1070,7 @@ static struct geneve_dev *geneve_find_dev(struct geneve_net *gn,
> *tun_on_same_port = true;
> }
> if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
> - rem_addr == geneve->remote.sin_addr.s_addr &&
> + !memcmp(remote, &geneve->remote, sizeof(geneve->remote)) &&
> dst_port == geneve->dst_port)
> t = geneve;
> }
> @@ -814,18 +1078,20 @@ static struct geneve_dev *geneve_find_dev(struct geneve_net *gn,
> }
>
> static int geneve_configure(struct net *net, struct net_device *dev,
> - __be32 rem_addr, __u32 vni, __u8 ttl, __u8 tos,
> - __be16 dst_port, bool metadata)
> + union geneve_addr *remote,
> + __u32 vni, __u8 ttl, __u8 tos, __be16 dst_port,
> + bool metadata)
> {
> struct geneve_net *gn = net_generic(net, geneve_net_id);
> struct geneve_dev *t, *geneve = netdev_priv(dev);
> bool tun_collect_md, tun_on_same_port;
> int err;
>
> - if (metadata) {
> - if (rem_addr || vni || tos || ttl)
> - return -EINVAL;
> - }
> + if (!remote)
> + return -EINVAL;
> + if (metadata &&
> + (remote->sa.sa_family != AF_UNSPEC || vni || tos || ttl))
> + return -EINVAL;
>
> geneve->net = net;
> geneve->dev = dev;
> @@ -834,16 +1100,19 @@ static int geneve_configure(struct net *net, struct net_device *dev,
> geneve->vni[1] = (vni & 0x0000ff00) >> 8;
> geneve->vni[2] = vni & 0x000000ff;
>
> - geneve->remote.sin_addr.s_addr = rem_addr;
> - if (IN_MULTICAST(ntohl(geneve->remote.sin_addr.s_addr)))
> + if ((remote->sa.sa_family == AF_INET &&
> + IN_MULTICAST(ntohl(remote->sin.sin_addr.s_addr))) ||
> + (remote->sa.sa_family == AF_INET6 &&
> + ipv6_addr_is_multicast(&remote->sin6.sin6_addr)))
> return -EINVAL;
> + geneve->remote = *remote;
>
> geneve->ttl = ttl;
> geneve->tos = tos;
> geneve->dst_port = dst_port;
> geneve->collect_md = metadata;
>
> - t = geneve_find_dev(gn, dst_port, rem_addr, geneve->vni,
> + t = geneve_find_dev(gn, dst_port, remote, geneve->vni,
> &tun_on_same_port, &tun_collect_md);
> if (t)
> return -EBUSY;
> @@ -870,14 +1139,29 @@ static int geneve_newlink(struct net *net, struct net_device *dev,
> __be16 dst_port = htons(GENEVE_UDP_PORT);
> __u8 ttl = 0, tos = 0;
> bool metadata = false;
> - __be32 rem_addr;
> + union geneve_addr remote;
> __u32 vni;
>
> - if (!data[IFLA_GENEVE_ID] || !data[IFLA_GENEVE_REMOTE])
> + if (!data[IFLA_GENEVE_ID] ||
> + (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) ||
> + (!data[IFLA_GENEVE_REMOTE] && !data[IFLA_GENEVE_REMOTE6]))
> return -EINVAL;
>
> vni = nla_get_u32(data[IFLA_GENEVE_ID]);
> - rem_addr = nla_get_in_addr(data[IFLA_GENEVE_REMOTE]);
> +
> + memset(&remote, 0, sizeof(remote));
> + if (data[IFLA_GENEVE_REMOTE]) {
> + remote.sa.sa_family = AF_INET;
> + remote.sin.sin_addr.s_addr =
> + nla_get_in_addr(data[IFLA_GENEVE_REMOTE]);
> + } else if (data[IFLA_GENEVE_REMOTE6]) {
> + if (!IS_ENABLED(CONFIG_IPV6))
> + return -EPFNOSUPPORT;
> +
> + remote.sa.sa_family = AF_INET6;
> + remote.sin6.sin6_addr =
> + nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]);
> + }
>
> if (data[IFLA_GENEVE_TTL])
> ttl = nla_get_u8(data[IFLA_GENEVE_TTL]);
> @@ -891,8 +1175,8 @@ static int geneve_newlink(struct net *net, struct net_device *dev,
> if (data[IFLA_GENEVE_COLLECT_METADATA])
> metadata = true;
>
> - return geneve_configure(net, dev, rem_addr, vni,
> - ttl, tos, dst_port, metadata);
> + return geneve_configure(net, dev, &remote, vni, ttl, tos, dst_port,
> + metadata);
> }
>
> static void geneve_dellink(struct net_device *dev, struct list_head *head)
> @@ -906,7 +1190,7 @@ static void geneve_dellink(struct net_device *dev, struct list_head *head)
> static size_t geneve_get_size(const struct net_device *dev)
> {
> return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */
> - nla_total_size(sizeof(struct in_addr)) + /* IFLA_GENEVE_REMOTE */
> + nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */
> nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */
> nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */
> nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */
> @@ -923,9 +1207,17 @@ static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev)
> if (nla_put_u32(skb, IFLA_GENEVE_ID, vni))
> goto nla_put_failure;
>
> - if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE,
> - geneve->remote.sin_addr.s_addr))
> - goto nla_put_failure;
> + if (geneve->remote.sa.sa_family == AF_INET) {
> + if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE,
> + geneve->remote.sin.sin_addr.s_addr))
> + goto nla_put_failure;
> +#if IS_ENABLED(CONFIG_IPV6)
> + } else {
> + if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6,
> + &geneve->remote.sin6.sin6_addr))
> + goto nla_put_failure;
> +#endif
> + }
>
> if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) ||
> nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos))
> @@ -971,7 +1263,8 @@ struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
> if (IS_ERR(dev))
> return dev;
>
> - err = geneve_configure(net, dev, 0, 0, 0, 0, htons(dst_port), true);
> + err = geneve_configure(net, dev, &geneve_remote_unspec,
> + 0, 0, 0, htons(dst_port), true);
> if (err) {
> free_netdev(dev);
> return ERR_PTR(err);
> diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
> index e3b6217f34f1..45e3a48550f9 100644
> --- a/include/uapi/linux/if_link.h
> +++ b/include/uapi/linux/if_link.h
> @@ -461,6 +461,7 @@ enum {
> IFLA_GENEVE_TOS,
> IFLA_GENEVE_PORT, /* destination port */
> IFLA_GENEVE_COLLECT_METADATA,
> + IFLA_GENEVE_REMOTE6,
> __IFLA_GENEVE_MAX
> };
> #define IFLA_GENEVE_MAX (__IFLA_GENEVE_MAX - 1)
>
--
吉藤英明 <hideaki.yoshifuji@...aclelinux.com>
ミラクル・リナックス株式会社 技術本部 サポート部
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