struct list_head sock_list;
};
-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, };
+static unsigned int geneve_net_id;
/* 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 ip_tunnel_info info;
struct geneve_sock __rcu *sock4; /* IPv4 socket used for geneve tunnel */
#if IS_ENABLED(CONFIG_IPV6)
struct geneve_sock __rcu *sock6; /* IPv6 socket used for geneve tunnel */
#endif
- u8 vni[3]; /* virtual network ID for tunnel */
- u8 ttl; /* TTL override */
- u8 tos; /* TOS override */
- union geneve_addr remote; /* IP address for link partner */
struct list_head next; /* geneve's per namespace list */
- __be32 label; /* IPv6 flowlabel override */
- __be16 dst_port;
- bool collect_md;
struct gro_cells gro_cells;
- u32 flags;
- struct dst_cache dst_cache;
+ bool collect_md;
+ bool use_udp6_rx_checksums;
};
-/* Geneve device flags */
-#define GENEVE_F_UDP_ZERO_CSUM_TX BIT(0)
-#define GENEVE_F_UDP_ZERO_CSUM6_TX BIT(1)
-#define GENEVE_F_UDP_ZERO_CSUM6_RX BIT(2)
-
struct geneve_sock {
bool collect_md;
struct list_head list;
struct rcu_head rcu;
int refcnt;
struct hlist_head vni_list[VNI_HASH_SIZE];
- u32 flags;
};
static inline __u32 geneve_net_vni_hash(u8 vni[3])
#endif
}
+/* Convert 64 bit tunnel ID to 24 bit VNI. */
+static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni)
+{
+#ifdef __BIG_ENDIAN
+ vni[0] = (__force __u8)(tun_id >> 16);
+ vni[1] = (__force __u8)(tun_id >> 8);
+ vni[2] = (__force __u8)tun_id;
+#else
+ vni[0] = (__force __u8)((__force u64)tun_id >> 40);
+ vni[1] = (__force __u8)((__force u64)tun_id >> 48);
+ vni[2] = (__force __u8)((__force u64)tun_id >> 56);
+#endif
+}
+
+static bool eq_tun_id_and_vni(u8 *tun_id, u8 *vni)
+{
+#ifdef __BIG_ENDIAN
+ return (vni[0] == tun_id[2]) &&
+ (vni[1] == tun_id[1]) &&
+ (vni[2] == tun_id[0]);
+#else
+ return !memcmp(vni, &tun_id[5], 3);
+#endif
+}
+
static sa_family_t geneve_get_sk_family(struct geneve_sock *gs)
{
return gs->sock->sk->sk_family;
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)) &&
- addr == geneve->remote.sin.sin_addr.s_addr)
+ if (eq_tun_id_and_vni((u8 *)&geneve->info.key.tun_id, vni) &&
+ addr == geneve->info.key.u.ipv4.dst)
return geneve;
}
return NULL;
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)) &&
- ipv6_addr_equal(&addr6, &geneve->remote.sin6.sin6_addr))
+ if (eq_tun_id_and_vni((u8 *)&geneve->info.key.tun_id, vni) &&
+ ipv6_addr_equal(&addr6, &geneve->info.key.u.ipv6.dst))
return geneve;
}
return NULL;
static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs,
struct sk_buff *skb)
{
- u8 *vni;
- __be32 addr;
static u8 zero_vni[3];
-#if IS_ENABLED(CONFIG_IPV6)
- static struct in6_addr zero_addr6;
-#endif
+ u8 *vni;
if (geneve_get_sk_family(gs) == AF_INET) {
struct iphdr *iph;
+ __be32 addr;
iph = ip_hdr(skb); /* outer IP header... */
return geneve_lookup(gs, addr, vni);
#if IS_ENABLED(CONFIG_IPV6)
} else if (geneve_get_sk_family(gs) == AF_INET6) {
+ static struct in6_addr zero_addr6;
struct ipv6hdr *ip6h;
struct in6_addr addr6;
return err;
}
- err = dst_cache_init(&geneve->dst_cache, GFP_KERNEL);
+ err = dst_cache_init(&geneve->info.dst_cache, GFP_KERNEL);
if (err) {
free_percpu(dev->tstats);
gro_cells_destroy(&geneve->gro_cells);
return err;
}
-
return 0;
}
{
struct geneve_dev *geneve = netdev_priv(dev);
- dst_cache_destroy(&geneve->dst_cache);
+ dst_cache_destroy(&geneve->info.dst_cache);
gro_cells_destroy(&geneve->gro_cells);
free_percpu(dev->tstats);
}
}
static struct socket *geneve_create_sock(struct net *net, bool ipv6,
- __be16 port, u32 flags)
+ __be16 port, bool ipv6_rx_csum)
{
struct socket *sock;
struct udp_port_cfg udp_conf;
if (ipv6) {
udp_conf.family = AF_INET6;
udp_conf.ipv6_v6only = 1;
- udp_conf.use_udp6_rx_checksums =
- !(flags & GENEVE_F_UDP_ZERO_CSUM6_RX);
+ udp_conf.use_udp6_rx_checksums = ipv6_rx_csum;
} else {
udp_conf.family = AF_INET;
udp_conf.local_ip.s_addr = htonl(INADDR_ANY);
/* Create new listen socket if needed */
static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port,
- bool ipv6, u32 flags)
+ bool ipv6, bool ipv6_rx_csum)
{
struct geneve_net *gn = net_generic(net, geneve_net_id);
struct geneve_sock *gs;
if (!gs)
return ERR_PTR(-ENOMEM);
- sock = geneve_create_sock(net, ipv6, port, flags);
+ sock = geneve_create_sock(net, ipv6, port, ipv6_rx_csum);
if (IS_ERR(sock)) {
kfree(gs);
return ERR_CAST(sock);
struct net *net = geneve->net;
struct geneve_net *gn = net_generic(net, geneve_net_id);
struct geneve_sock *gs;
+ __u8 vni[3];
__u32 hash;
- gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->dst_port);
+ gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->info.key.tp_dst);
if (gs) {
gs->refcnt++;
goto out;
}
- gs = geneve_socket_create(net, geneve->dst_port, ipv6, geneve->flags);
+ gs = geneve_socket_create(net, geneve->info.key.tp_dst, ipv6,
+ geneve->use_udp6_rx_checksums);
if (IS_ERR(gs))
return PTR_ERR(gs);
out:
gs->collect_md = geneve->collect_md;
- gs->flags = geneve->flags;
#if IS_ENABLED(CONFIG_IPV6)
if (ipv6)
rcu_assign_pointer(geneve->sock6, gs);
#endif
rcu_assign_pointer(geneve->sock4, gs);
- hash = geneve_net_vni_hash(geneve->vni);
+ tunnel_id_to_vni(geneve->info.key.tun_id, vni);
+ hash = geneve_net_vni_hash(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 ipv6 = !!(geneve->info.mode & IP_TUNNEL_INFO_IPV6);
bool metadata = geneve->collect_md;
int ret = 0;
}
static void geneve_build_header(struct genevehdr *geneveh,
- __be16 tun_flags, u8 vni[3],
- u8 options_len, u8 *options)
+ const struct ip_tunnel_info *info)
{
geneveh->ver = GENEVE_VER;
- geneveh->opt_len = options_len / 4;
- geneveh->oam = !!(tun_flags & TUNNEL_OAM);
- geneveh->critical = !!(tun_flags & TUNNEL_CRIT_OPT);
+ geneveh->opt_len = info->options_len / 4;
+ geneveh->oam = !!(info->key.tun_flags & TUNNEL_OAM);
+ geneveh->critical = !!(info->key.tun_flags & TUNNEL_CRIT_OPT);
geneveh->rsvd1 = 0;
- memcpy(geneveh->vni, vni, 3);
+ tunnel_id_to_vni(info->key.tun_id, geneveh->vni);
geneveh->proto_type = htons(ETH_P_TEB);
geneveh->rsvd2 = 0;
- memcpy(geneveh->options, options, options_len);
+ ip_tunnel_info_opts_get(geneveh->options, info);
}
-static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb,
- __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt,
- u32 flags, bool xnet)
+static int geneve_build_skb(struct dst_entry *dst, struct sk_buff *skb,
+ const struct ip_tunnel_info *info,
+ bool xnet, int ip_hdr_len)
{
+ bool udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM);
struct genevehdr *gnvh;
int min_headroom;
int err;
- bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM_TX);
-
- skb_scrub_packet(skb, xnet);
-
- min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len
- + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr);
- err = skb_cow_head(skb, min_headroom);
- if (unlikely(err))
- goto free_rt;
-
- err = udp_tunnel_handle_offloads(skb, udp_sum);
- if (err)
- goto free_rt;
-
- 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_rt:
- ip_rt_put(rt);
- return err;
-}
-
-#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,
- u32 flags, bool xnet)
-{
- struct genevehdr *gnvh;
- int min_headroom;
- int err;
- bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM6_TX);
+ skb_reset_mac_header(skb);
skb_scrub_packet(skb, xnet);
- min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
- + GENEVE_BASE_HLEN + opt_len + sizeof(struct ipv6hdr);
+ min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len +
+ GENEVE_BASE_HLEN + info->options_len + ip_hdr_len;
err = skb_cow_head(skb, min_headroom);
if (unlikely(err))
goto free_dst;
if (err)
goto free_dst;
- gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len);
- geneve_build_header(gnvh, tun_flags, vni, opt_len, opt);
-
+ gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) +
+ info->options_len);
+ geneve_build_header(gnvh, info);
skb_set_inner_protocol(skb, htons(ETH_P_TEB));
return 0;
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)
+ const struct ip_tunnel_info *info)
{
bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
struct geneve_dev *geneve = netdev_priv(dev);
memset(fl4, 0, sizeof(*fl4));
fl4->flowi4_mark = skb->mark;
fl4->flowi4_proto = IPPROTO_UDP;
+ fl4->daddr = info->key.u.ipv4.dst;
+ fl4->saddr = info->key.u.ipv4.src;
- if (info) {
- fl4->daddr = info->key.u.ipv4.dst;
- fl4->saddr = info->key.u.ipv4.src;
- fl4->flowi4_tos = RT_TOS(info->key.tos);
- dst_cache = &info->dst_cache;
- } else {
- tos = geneve->tos;
- if (tos == 1) {
- const struct iphdr *iip = ip_hdr(skb);
-
- tos = ip_tunnel_get_dsfield(iip, skb);
- use_cache = false;
- }
-
- fl4->flowi4_tos = RT_TOS(tos);
- fl4->daddr = geneve->remote.sin.sin_addr.s_addr;
- dst_cache = &geneve->dst_cache;
+ tos = info->key.tos;
+ if ((tos == 1) && !geneve->collect_md) {
+ tos = ip_tunnel_get_dsfield(ip_hdr(skb), skb);
+ use_cache = false;
}
+ fl4->flowi4_tos = RT_TOS(tos);
+ dst_cache = (struct dst_cache *)&info->dst_cache;
if (use_cache) {
rt = dst_cache_get_ip4(dst_cache, &fl4->saddr);
if (rt)
return rt;
}
-
rt = ip_route_output_key(geneve->net, fl4);
if (IS_ERR(rt)) {
netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr);
static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb,
struct net_device *dev,
struct flowi6 *fl6,
- struct ip_tunnel_info *info)
+ const struct ip_tunnel_info *info)
{
bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
struct geneve_dev *geneve = netdev_priv(dev);
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;
- fl6->flowlabel = ip6_make_flowinfo(RT_TOS(info->key.tos),
- info->key.label);
- dst_cache = &info->dst_cache;
- } else {
- prio = geneve->tos;
- if (prio == 1) {
- const struct iphdr *iip = ip_hdr(skb);
-
- prio = ip_tunnel_get_dsfield(iip, skb);
- use_cache = false;
- }
-
- fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio),
- geneve->label);
- fl6->daddr = geneve->remote.sin6.sin6_addr;
- dst_cache = &geneve->dst_cache;
+ fl6->daddr = info->key.u.ipv6.dst;
+ fl6->saddr = info->key.u.ipv6.src;
+ prio = info->key.tos;
+ if ((prio == 1) && !geneve->collect_md) {
+ prio = ip_tunnel_get_dsfield(ip_hdr(skb), skb);
+ use_cache = false;
}
+ fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio),
+ info->key.label);
+ dst_cache = (struct dst_cache *)&info->dst_cache;
if (use_cache) {
dst = dst_cache_get_ip6(dst_cache, &fl6->saddr);
if (dst)
return dst;
}
-
if (ipv6_stub->ipv6_dst_lookup(geneve->net, gs6->sock->sk, &dst, fl6)) {
netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr);
return ERR_PTR(-ENETUNREACH);
}
#endif
-/* Convert 64 bit tunnel ID to 24 bit VNI. */
-static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni)
+static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
+ struct geneve_dev *geneve,
+ const struct ip_tunnel_info *info)
{
-#ifdef __BIG_ENDIAN
- vni[0] = (__force __u8)(tun_id >> 16);
- vni[1] = (__force __u8)(tun_id >> 8);
- vni[2] = (__force __u8)tun_id;
-#else
- vni[0] = (__force __u8)((__force u64)tun_id >> 40);
- vni[1] = (__force __u8)((__force u64)tun_id >> 48);
- vni[2] = (__force __u8)((__force u64)tun_id >> 56);
-#endif
-}
-
-static netdev_tx_t geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
- struct ip_tunnel_info *info)
-{
- struct geneve_dev *geneve = netdev_priv(dev);
- struct geneve_sock *gs4;
- struct rtable *rt = NULL;
- const struct iphdr *iip; /* interior IP header */
- int err = -EINVAL;
+ bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
+ struct geneve_sock *gs4 = rcu_dereference(geneve->sock4);
+ const struct ip_tunnel_key *key = &info->key;
+ struct rtable *rt;
struct flowi4 fl4;
__u8 tos, ttl;
__be16 sport;
__be16 df;
- bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
- u32 flags = geneve->flags;
-
- gs4 = rcu_dereference(geneve->sock4);
- if (!gs4)
- goto tx_error;
-
- if (geneve->collect_md) {
- if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) {
- netdev_dbg(dev, "no tunnel metadata\n");
- goto tx_error;
- }
- if (info && ip_tunnel_info_af(info) != AF_INET)
- goto tx_error;
- }
+ int err;
rt = geneve_get_v4_rt(skb, dev, &fl4, info);
- if (IS_ERR(rt)) {
- err = PTR_ERR(rt);
- goto tx_error;
- }
+ if (IS_ERR(rt))
+ return PTR_ERR(rt);
sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
- skb_reset_mac_header(skb);
-
- iip = ip_hdr(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 (info->options_len)
- opts = ip_tunnel_info_opts(info);
-
- if (key->tun_flags & TUNNEL_CSUM)
- flags &= ~GENEVE_F_UDP_ZERO_CSUM_TX;
- else
- flags |= GENEVE_F_UDP_ZERO_CSUM_TX;
-
- err = geneve_build_skb(rt, skb, key->tun_flags, vni,
- info->options_len, opts, flags, xnet);
- if (unlikely(err))
- goto tx_error;
-
- tos = ip_tunnel_ecn_encap(key->tos, iip, skb);
+ if (geneve->collect_md) {
+ tos = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb);
ttl = key->ttl;
- df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
} else {
- err = geneve_build_skb(rt, skb, 0, geneve->vni,
- 0, NULL, flags, xnet);
- if (unlikely(err))
- goto tx_error;
-
- tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb);
- ttl = geneve->ttl;
- if (!ttl && IN_MULTICAST(ntohl(fl4.daddr)))
- ttl = 1;
- ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
- df = 0;
+ tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, ip_hdr(skb), skb);
+ ttl = key->ttl ? : ip4_dst_hoplimit(&rt->dst);
}
- 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)),
- !!(flags & GENEVE_F_UDP_ZERO_CSUM_TX));
-
- return NETDEV_TX_OK;
-
-tx_error:
- dev_kfree_skb(skb);
+ df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
- if (err == -ELOOP)
- dev->stats.collisions++;
- else if (err == -ENETUNREACH)
- dev->stats.tx_carrier_errors++;
+ err = geneve_build_skb(&rt->dst, skb, info, xnet, sizeof(struct iphdr));
+ if (unlikely(err))
+ return err;
- dev->stats.tx_errors++;
- return NETDEV_TX_OK;
+ udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr,
+ tos, ttl, df, sport, geneve->info.key.tp_dst,
+ !net_eq(geneve->net, dev_net(geneve->dev)),
+ !(info->key.tun_flags & TUNNEL_CSUM));
+ return 0;
}
#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)
+static int geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
+ struct geneve_dev *geneve,
+ const struct ip_tunnel_info *info)
{
- struct geneve_dev *geneve = netdev_priv(dev);
+ bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
+ struct geneve_sock *gs6 = rcu_dereference(geneve->sock6);
+ const struct ip_tunnel_key *key = &info->key;
struct dst_entry *dst = NULL;
- const struct iphdr *iip; /* interior IP header */
- struct geneve_sock *gs6;
- int err = -EINVAL;
struct flowi6 fl6;
__u8 prio, ttl;
__be16 sport;
- __be32 label;
- bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
- u32 flags = geneve->flags;
-
- gs6 = rcu_dereference(geneve->sock6);
- if (!gs6)
- goto tx_error;
-
- if (geneve->collect_md) {
- if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) {
- netdev_dbg(dev, "no tunnel metadata\n");
- goto tx_error;
- }
- }
+ int err;
dst = geneve_get_v6_dst(skb, dev, &fl6, info);
- if (IS_ERR(dst)) {
- err = PTR_ERR(dst);
- goto tx_error;
- }
+ if (IS_ERR(dst))
+ return PTR_ERR(dst);
sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
- skb_reset_mac_header(skb);
-
- iip = ip_hdr(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 (info->options_len)
- opts = ip_tunnel_info_opts(info);
-
- if (key->tun_flags & TUNNEL_CSUM)
- flags &= ~GENEVE_F_UDP_ZERO_CSUM6_TX;
- else
- flags |= GENEVE_F_UDP_ZERO_CSUM6_TX;
-
- err = geneve6_build_skb(dst, skb, key->tun_flags, vni,
- info->options_len, opts,
- flags, xnet);
- if (unlikely(err))
- goto tx_error;
-
- prio = ip_tunnel_ecn_encap(key->tos, iip, skb);
+ if (geneve->collect_md) {
+ prio = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb);
ttl = key->ttl;
- label = info->key.label;
} else {
- err = geneve6_build_skb(dst, skb, 0, geneve->vni,
- 0, NULL, flags, xnet);
- if (unlikely(err))
- goto tx_error;
-
prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel),
- iip, skb);
- ttl = geneve->ttl;
- if (!ttl && ipv6_addr_is_multicast(&fl6.daddr))
- ttl = 1;
- ttl = ttl ? : ip6_dst_hoplimit(dst);
- label = geneve->label;
+ ip_hdr(skb), skb);
+ ttl = key->ttl ? : ip6_dst_hoplimit(dst);
}
+ err = geneve_build_skb(dst, skb, info, xnet, sizeof(struct ipv6hdr));
+ if (unlikely(err))
+ return err;
udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev,
- &fl6.saddr, &fl6.daddr, prio, ttl, label,
- sport, geneve->dst_port,
- !!(flags & GENEVE_F_UDP_ZERO_CSUM6_TX));
- return NETDEV_TX_OK;
-
-tx_error:
- dev_kfree_skb(skb);
-
- if (err == -ELOOP)
- dev->stats.collisions++;
- else if (err == -ENETUNREACH)
- dev->stats.tx_carrier_errors++;
-
- dev->stats.tx_errors++;
- return NETDEV_TX_OK;
+ &fl6.saddr, &fl6.daddr, prio, ttl,
+ info->key.label, sport, geneve->info.key.tp_dst,
+ !(info->key.tun_flags & TUNNEL_CSUM));
+ return 0;
}
#endif
{
struct geneve_dev *geneve = netdev_priv(dev);
struct ip_tunnel_info *info = NULL;
+ int err;
- if (geneve->collect_md)
+ if (geneve->collect_md) {
info = skb_tunnel_info(skb);
+ if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) {
+ err = -EINVAL;
+ netdev_dbg(dev, "no tunnel metadata\n");
+ goto tx_error;
+ }
+ } else {
+ info = &geneve->info;
+ }
#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 int __geneve_change_mtu(struct net_device *dev, int new_mtu, bool strict)
-{
- struct geneve_dev *geneve = netdev_priv(dev);
- /* The max_mtu calculation does not take account of GENEVE
- * options, to avoid excluding potentially valid
- * configurations.
- */
- int max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len;
-
- if (geneve->remote.sa.sa_family == AF_INET6)
- max_mtu -= sizeof(struct ipv6hdr);
+ if (info->mode & IP_TUNNEL_INFO_IPV6)
+ err = geneve6_xmit_skb(skb, dev, geneve, info);
else
- max_mtu -= sizeof(struct iphdr);
-
- if (new_mtu < 68)
- return -EINVAL;
+#endif
+ err = geneve_xmit_skb(skb, dev, geneve, info);
- if (new_mtu > max_mtu) {
- if (strict)
- return -EINVAL;
+ if (likely(!err))
+ return NETDEV_TX_OK;
+tx_error:
+ dev_kfree_skb(skb);
- new_mtu = max_mtu;
- }
+ if (err == -ELOOP)
+ dev->stats.collisions++;
+ else if (err == -ENETUNREACH)
+ dev->stats.tx_carrier_errors++;
- dev->mtu = new_mtu;
- return 0;
+ dev->stats.tx_errors++;
+ return NETDEV_TX_OK;
}
static int geneve_change_mtu(struct net_device *dev, int new_mtu)
{
- return __geneve_change_mtu(dev, new_mtu, true);
+ /* Only possible if called internally, ndo_change_mtu path's new_mtu
+ * is guaranteed to be between dev->min_mtu and dev->max_mtu.
+ */
+ if (new_mtu > dev->max_mtu)
+ new_mtu = dev->max_mtu;
+
+ dev->mtu = new_mtu;
+ return 0;
}
static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
{
struct ip_tunnel_info *info = skb_tunnel_info(skb);
struct geneve_dev *geneve = netdev_priv(dev);
- struct rtable *rt;
- struct flowi4 fl4;
-#if IS_ENABLED(CONFIG_IPV6)
- struct dst_entry *dst;
- struct flowi6 fl6;
-#endif
if (ip_tunnel_info_af(info) == AF_INET) {
+ struct rtable *rt;
+ struct flowi4 fl4;
+
rt = geneve_get_v4_rt(skb, dev, &fl4, info);
if (IS_ERR(rt))
return PTR_ERR(rt);
info->key.u.ipv4.src = fl4.saddr;
#if IS_ENABLED(CONFIG_IPV6)
} else if (ip_tunnel_info_af(info) == AF_INET6) {
+ struct dst_entry *dst;
+ struct flowi6 fl6;
+
dst = geneve_get_v6_dst(skb, dev, &fl6, info);
if (IS_ERR(dst))
return PTR_ERR(dst);
info->key.tp_src = udp_flow_src_port(geneve->net, skb,
1, USHRT_MAX, true);
- info->key.tp_dst = geneve->dst_port;
+ info->key.tp_dst = geneve->info.key.tp_dst;
return 0;
}
dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
dev->hw_features |= NETIF_F_GSO_SOFTWARE;
+ /* MTU range: 68 - (something less than 65535) */
+ dev->min_mtu = ETH_MIN_MTU;
+ /* The max_mtu calculation does not take account of GENEVE
+ * options, to avoid excluding potentially valid
+ * configurations. This will be further reduced by IPvX hdr size.
+ */
+ dev->max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len;
+
netif_keep_dst(dev);
dev->priv_flags &= ~IFF_TX_SKB_SHARING;
dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
}
static struct geneve_dev *geneve_find_dev(struct geneve_net *gn,
- __be16 dst_port,
- union geneve_addr *remote,
- u8 vni[],
+ const struct ip_tunnel_info *info,
bool *tun_on_same_port,
bool *tun_collect_md)
{
- struct geneve_dev *geneve, *t;
+ struct geneve_dev *geneve, *t = NULL;
*tun_on_same_port = false;
*tun_collect_md = false;
- t = NULL;
list_for_each_entry(geneve, &gn->geneve_list, next) {
- if (geneve->dst_port == dst_port) {
+ if (info->key.tp_dst == geneve->info.key.tp_dst) {
*tun_collect_md = geneve->collect_md;
*tun_on_same_port = true;
}
- if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
- !memcmp(remote, &geneve->remote, sizeof(geneve->remote)) &&
- dst_port == geneve->dst_port)
+ if (info->key.tun_id == geneve->info.key.tun_id &&
+ info->key.tp_dst == geneve->info.key.tp_dst &&
+ !memcmp(&info->key.u, &geneve->info.key.u, sizeof(info->key.u)))
t = geneve;
}
return t;
}
+static bool is_all_zero(const u8 *fp, size_t size)
+{
+ int i;
+
+ for (i = 0; i < size; i++)
+ if (fp[i])
+ return false;
+ return true;
+}
+
+static bool is_tnl_info_zero(const struct ip_tunnel_info *info)
+{
+ if (info->key.tun_id || info->key.tun_flags || info->key.tos ||
+ info->key.ttl || info->key.label || info->key.tp_src ||
+ !is_all_zero((const u8 *)&info->key.u, sizeof(info->key.u)))
+ return false;
+ else
+ return true;
+}
+
static int geneve_configure(struct net *net, struct net_device *dev,
- union geneve_addr *remote,
- __u32 vni, __u8 ttl, __u8 tos, __be32 label,
- __be16 dst_port, bool metadata, u32 flags)
+ const struct ip_tunnel_info *info,
+ bool metadata, bool ipv6_rx_csum)
{
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, encap_len;
- if (!remote)
- return -EINVAL;
- if (metadata &&
- (remote->sa.sa_family != AF_UNSPEC || vni || tos || ttl || label))
+ if (metadata && !is_tnl_info_zero(info))
return -EINVAL;
geneve->net = net;
geneve->dev = dev;
- geneve->vni[0] = (vni & 0x00ff0000) >> 16;
- geneve->vni[1] = (vni & 0x0000ff00) >> 8;
- geneve->vni[2] = vni & 0x000000ff;
-
- 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;
- if (label && remote->sa.sa_family != AF_INET6)
- return -EINVAL;
-
- geneve->remote = *remote;
-
- geneve->ttl = ttl;
- geneve->tos = tos;
- geneve->label = label;
- geneve->dst_port = dst_port;
- geneve->collect_md = metadata;
- geneve->flags = flags;
-
- t = geneve_find_dev(gn, dst_port, remote, geneve->vni,
- &tun_on_same_port, &tun_collect_md);
+ t = geneve_find_dev(gn, info, &tun_on_same_port, &tun_collect_md);
if (t)
return -EBUSY;
/* make enough headroom for basic scenario */
encap_len = GENEVE_BASE_HLEN + ETH_HLEN;
- if (remote->sa.sa_family == AF_INET)
+ if (ip_tunnel_info_af(info) == AF_INET) {
encap_len += sizeof(struct iphdr);
- else
+ dev->max_mtu -= sizeof(struct iphdr);
+ } else {
encap_len += sizeof(struct ipv6hdr);
+ dev->max_mtu -= sizeof(struct ipv6hdr);
+ }
dev->needed_headroom = encap_len + ETH_HLEN;
if (metadata) {
return -EPERM;
}
- dst_cache_reset(&geneve->dst_cache);
+ dst_cache_reset(&geneve->info.dst_cache);
+ geneve->info = *info;
+ geneve->collect_md = metadata;
+ geneve->use_udp6_rx_checksums = ipv6_rx_csum;
err = register_netdevice(dev);
if (err)
return 0;
}
+static void init_tnl_info(struct ip_tunnel_info *info, __u16 dst_port)
+{
+ memset(info, 0, sizeof(*info));
+ info->key.tp_dst = htons(dst_port);
+}
+
static int geneve_newlink(struct net *net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[])
{
- __be16 dst_port = htons(GENEVE_UDP_PORT);
- __u8 ttl = 0, tos = 0;
+ bool use_udp6_rx_checksums = false;
+ struct ip_tunnel_info info;
bool metadata = false;
- union geneve_addr remote = geneve_remote_unspec;
- __be32 label = 0;
- __u32 vni = 0;
- u32 flags = 0;
+
+ init_tnl_info(&info, GENEVE_UDP_PORT);
if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6])
return -EINVAL;
if (data[IFLA_GENEVE_REMOTE]) {
- remote.sa.sa_family = AF_INET;
- remote.sin.sin_addr.s_addr =
+ info.key.u.ipv4.dst =
nla_get_in_addr(data[IFLA_GENEVE_REMOTE]);
+
+ if (IN_MULTICAST(ntohl(info.key.u.ipv4.dst))) {
+ netdev_dbg(dev, "multicast remote is unsupported\n");
+ return -EINVAL;
+ }
}
if (data[IFLA_GENEVE_REMOTE6]) {
- if (!IS_ENABLED(CONFIG_IPV6))
- return -EPFNOSUPPORT;
-
- remote.sa.sa_family = AF_INET6;
- remote.sin6.sin6_addr =
+ #if IS_ENABLED(CONFIG_IPV6)
+ info.mode = IP_TUNNEL_INFO_IPV6;
+ info.key.u.ipv6.dst =
nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]);
- if (ipv6_addr_type(&remote.sin6.sin6_addr) &
+ if (ipv6_addr_type(&info.key.u.ipv6.dst) &
IPV6_ADDR_LINKLOCAL) {
netdev_dbg(dev, "link-local remote is unsupported\n");
return -EINVAL;
}
+ if (ipv6_addr_is_multicast(&info.key.u.ipv6.dst)) {
+ netdev_dbg(dev, "multicast remote is unsupported\n");
+ return -EINVAL;
+ }
+ info.key.tun_flags |= TUNNEL_CSUM;
+ use_udp6_rx_checksums = true;
+#else
+ return -EPFNOSUPPORT;
+#endif
}
- if (data[IFLA_GENEVE_ID])
+ if (data[IFLA_GENEVE_ID]) {
+ __u32 vni;
+ __u8 tvni[3];
+
vni = nla_get_u32(data[IFLA_GENEVE_ID]);
+ tvni[0] = (vni & 0x00ff0000) >> 16;
+ tvni[1] = (vni & 0x0000ff00) >> 8;
+ tvni[2] = vni & 0x000000ff;
+ info.key.tun_id = vni_to_tunnel_id(tvni);
+ }
if (data[IFLA_GENEVE_TTL])
- ttl = nla_get_u8(data[IFLA_GENEVE_TTL]);
+ info.key.ttl = nla_get_u8(data[IFLA_GENEVE_TTL]);
if (data[IFLA_GENEVE_TOS])
- tos = nla_get_u8(data[IFLA_GENEVE_TOS]);
+ info.key.tos = nla_get_u8(data[IFLA_GENEVE_TOS]);
- if (data[IFLA_GENEVE_LABEL])
- label = nla_get_be32(data[IFLA_GENEVE_LABEL]) &
- IPV6_FLOWLABEL_MASK;
+ if (data[IFLA_GENEVE_LABEL]) {
+ info.key.label = nla_get_be32(data[IFLA_GENEVE_LABEL]) &
+ IPV6_FLOWLABEL_MASK;
+ if (info.key.label && (!(info.mode & IP_TUNNEL_INFO_IPV6)))
+ return -EINVAL;
+ }
if (data[IFLA_GENEVE_PORT])
- dst_port = nla_get_be16(data[IFLA_GENEVE_PORT]);
+ info.key.tp_dst = nla_get_be16(data[IFLA_GENEVE_PORT]);
if (data[IFLA_GENEVE_COLLECT_METADATA])
metadata = true;
if (data[IFLA_GENEVE_UDP_CSUM] &&
!nla_get_u8(data[IFLA_GENEVE_UDP_CSUM]))
- flags |= GENEVE_F_UDP_ZERO_CSUM_TX;
+ info.key.tun_flags |= TUNNEL_CSUM;
if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] &&
nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]))
- flags |= GENEVE_F_UDP_ZERO_CSUM6_TX;
+ info.key.tun_flags &= ~TUNNEL_CSUM;
if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX] &&
nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]))
- flags |= GENEVE_F_UDP_ZERO_CSUM6_RX;
+ use_udp6_rx_checksums = false;
- return geneve_configure(net, dev, &remote, vni, ttl, tos, label,
- dst_port, metadata, flags);
+ return geneve_configure(net, dev, &info, metadata, use_udp6_rx_checksums);
}
static void geneve_dellink(struct net_device *dev, struct list_head *head)
static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev)
{
struct geneve_dev *geneve = netdev_priv(dev);
+ struct ip_tunnel_info *info = &geneve->info;
+ __u8 tmp_vni[3];
__u32 vni;
- vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2];
+ tunnel_id_to_vni(info->key.tun_id, tmp_vni);
+ vni = (tmp_vni[0] << 16) | (tmp_vni[1] << 8) | tmp_vni[2];
if (nla_put_u32(skb, IFLA_GENEVE_ID, vni))
goto nla_put_failure;
- if (geneve->remote.sa.sa_family == AF_INET) {
+ if (ip_tunnel_info_af(info) == AF_INET) {
if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE,
- geneve->remote.sin.sin_addr.s_addr))
+ info->key.u.ipv4.dst))
goto nla_put_failure;
+
+ if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM,
+ !!(info->key.tun_flags & TUNNEL_CSUM)))
+ goto nla_put_failure;
+
#if IS_ENABLED(CONFIG_IPV6)
} else {
if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6,
- &geneve->remote.sin6.sin6_addr))
+ &info->key.u.ipv6.dst))
+ goto nla_put_failure;
+
+ if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
+ !(info->key.tun_flags & TUNNEL_CSUM)))
+ goto nla_put_failure;
+
+ if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
+ !geneve->use_udp6_rx_checksums))
goto nla_put_failure;
#endif
}
- if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) ||
- nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos) ||
- nla_put_be32(skb, IFLA_GENEVE_LABEL, geneve->label))
+ if (nla_put_u8(skb, IFLA_GENEVE_TTL, info->key.ttl) ||
+ nla_put_u8(skb, IFLA_GENEVE_TOS, info->key.tos) ||
+ nla_put_be32(skb, IFLA_GENEVE_LABEL, info->key.label))
goto nla_put_failure;
- if (nla_put_be16(skb, IFLA_GENEVE_PORT, geneve->dst_port))
+ if (nla_put_be16(skb, IFLA_GENEVE_PORT, info->key.tp_dst))
goto nla_put_failure;
if (geneve->collect_md) {
if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA))
goto nla_put_failure;
}
-
- if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM,
- !(geneve->flags & GENEVE_F_UDP_ZERO_CSUM_TX)) ||
- nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
- !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_TX)) ||
- nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
- !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_RX)))
- goto nla_put_failure;
-
return 0;
nla_put_failure:
u8 name_assign_type, u16 dst_port)
{
struct nlattr *tb[IFLA_MAX + 1];
+ struct ip_tunnel_info info;
struct net_device *dev;
LIST_HEAD(list_kill);
int err;
if (IS_ERR(dev))
return dev;
- err = geneve_configure(net, dev, &geneve_remote_unspec,
- 0, 0, 0, 0, htons(dst_port), true,
- GENEVE_F_UDP_ZERO_CSUM6_RX);
+ init_tnl_info(&info, dst_port);
+ err = geneve_configure(net, dev, &info, true, true);
if (err) {
free_netdev(dev);
return ERR_PTR(err);
/* openvswitch users expect packet sizes to be unrestricted,
* so set the largest MTU we can.
*/
- err = __geneve_change_mtu(dev, IP_MAX_MTU, false);
+ err = geneve_change_mtu(dev, IP_MAX_MTU);
if (err)
goto err;
goto err;
return dev;
-
- err:
+err:
geneve_dellink(dev, &list_kill);
unregister_netdevice_many(&list_kill);
return ERR_PTR(err);
goto out3;
return 0;
-
out3:
unregister_netdevice_notifier(&geneve_notifier_block);
out2:
projects / karo-tx-linux.git / blobdiff