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-rw-r--r--drivers/net/bareudp.c11
-rw-r--r--drivers/net/geneve.c111
-rw-r--r--drivers/net/vxlan/vxlan_core.c114
-rw-r--r--include/net/route.h6
-rw-r--r--include/net/udp_tunnel.h8
-rw-r--r--net/ipv4/route.c48
-rw-r--r--net/ipv4/udp_tunnel_core.c49
7 files changed, 147 insertions, 200 deletions
diff --git a/drivers/net/bareudp.c b/drivers/net/bareudp.c
index 683203f87ae2..47a9c2a5583c 100644
--- a/drivers/net/bareudp.c
+++ b/drivers/net/bareudp.c
@@ -306,8 +306,10 @@ static int bareudp_xmit_skb(struct sk_buff *skb, struct net_device *dev,
if (!sock)
return -ESHUTDOWN;
- rt = ip_route_output_tunnel(skb, dev, bareudp->net, &saddr, info,
- IPPROTO_UDP, use_cache);
+ rt = udp_tunnel_dst_lookup(skb, dev, bareudp->net, 0, &saddr, &info->key,
+ 0, 0, key->tos,
+ use_cache ?
+ (struct dst_cache *)&info->dst_cache : NULL);
if (IS_ERR(rt))
return PTR_ERR(rt);
@@ -483,8 +485,9 @@ static int bareudp_fill_metadata_dst(struct net_device *dev,
struct rtable *rt;
__be32 saddr;
- rt = ip_route_output_tunnel(skb, dev, bareudp->net, &saddr,
- info, IPPROTO_UDP, use_cache);
+ rt = udp_tunnel_dst_lookup(skb, dev, bareudp->net, 0, &saddr,
+ &info->key, 0, 0, info->key.tos,
+ use_cache ? &info->dst_cache : NULL);
if (IS_ERR(rt))
return PTR_ERR(rt);
diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c
index 78f9d588f712..23041eeec121 100644
--- a/drivers/net/geneve.c
+++ b/drivers/net/geneve.c
@@ -784,60 +784,20 @@ free_dst:
return err;
}
-static struct rtable *geneve_get_v4_rt(struct sk_buff *skb,
- struct net_device *dev,
- struct geneve_sock *gs4,
- struct flowi4 *fl4,
- const struct ip_tunnel_info *info,
- __be16 dport, __be16 sport,
- __u8 *full_tos)
+static u8 geneve_get_dsfield(struct sk_buff *skb, struct net_device *dev,
+ const struct ip_tunnel_info *info,
+ bool *use_cache)
{
- bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
struct geneve_dev *geneve = netdev_priv(dev);
- struct dst_cache *dst_cache;
- struct rtable *rt = NULL;
- __u8 tos;
-
- if (!gs4)
- return ERR_PTR(-EIO);
+ u8 dsfield;
- 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;
- fl4->fl4_dport = dport;
- fl4->fl4_sport = sport;
- fl4->flowi4_flags = info->key.flow_flags;
-
- tos = info->key.tos;
- if ((tos == 1) && !geneve->cfg.collect_md) {
- tos = ip_tunnel_get_dsfield(ip_hdr(skb), skb);
- use_cache = false;
+ dsfield = info->key.tos;
+ if (dsfield == 1 && !geneve->cfg.collect_md) {
+ dsfield = ip_tunnel_get_dsfield(ip_hdr(skb), skb);
+ *use_cache = false;
}
- fl4->flowi4_tos = RT_TOS(tos);
- if (full_tos)
- *full_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);
- return ERR_PTR(-ENETUNREACH);
- }
- if (rt->dst.dev == dev) { /* is this necessary? */
- netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr);
- ip_rt_put(rt);
- return ERR_PTR(-ELOOP);
- }
- if (use_cache)
- dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr);
- return rt;
+ return dsfield;
}
#if IS_ENABLED(CONFIG_IPV6)
@@ -865,12 +825,7 @@ static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb,
fl6->fl6_dport = dport;
fl6->fl6_sport = sport;
- prio = info->key.tos;
- if ((prio == 1) && !geneve->cfg.collect_md) {
- prio = ip_tunnel_get_dsfield(ip_hdr(skb), skb);
- use_cache = false;
- }
-
+ prio = geneve_get_dsfield(skb, dev, info, &use_cache);
fl6->flowlabel = ip6_make_flowinfo(prio, info->key.label);
dst_cache = (struct dst_cache *)&info->dst_cache;
if (use_cache) {
@@ -904,19 +859,28 @@ static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
struct geneve_sock *gs4 = rcu_dereference(geneve->sock4);
const struct ip_tunnel_key *key = &info->key;
struct rtable *rt;
- struct flowi4 fl4;
- __u8 full_tos;
+ bool use_cache;
__u8 tos, ttl;
__be16 df = 0;
+ __be32 saddr;
__be16 sport;
int err;
if (!pskb_inet_may_pull(skb))
return -EINVAL;
+ if (!gs4)
+ return -EIO;
+
+ use_cache = ip_tunnel_dst_cache_usable(skb, info);
+ tos = geneve_get_dsfield(skb, dev, info, &use_cache);
sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
- rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info,
- geneve->cfg.info.key.tp_dst, sport, &full_tos);
+
+ rt = udp_tunnel_dst_lookup(skb, dev, geneve->net, 0, &saddr,
+ &info->key,
+ sport, geneve->cfg.info.key.tp_dst, tos,
+ use_cache ?
+ (struct dst_cache *)&info->dst_cache : NULL);
if (IS_ERR(rt))
return PTR_ERR(rt);
@@ -939,8 +903,8 @@ static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
return -ENOMEM;
}
- unclone->key.u.ipv4.dst = fl4.saddr;
- unclone->key.u.ipv4.src = fl4.daddr;
+ unclone->key.u.ipv4.dst = saddr;
+ unclone->key.u.ipv4.src = info->key.u.ipv4.dst;
}
if (!pskb_may_pull(skb, ETH_HLEN)) {
@@ -954,13 +918,12 @@ static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
return -EMSGSIZE;
}
+ tos = ip_tunnel_ecn_encap(tos, ip_hdr(skb), skb);
if (geneve->cfg.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 {
- tos = ip_tunnel_ecn_encap(full_tos, ip_hdr(skb), skb);
if (geneve->cfg.ttl_inherit)
ttl = ip_tunnel_get_ttl(ip_hdr(skb), skb);
else
@@ -988,7 +951,7 @@ static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
if (unlikely(err))
return err;
- udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr,
+ udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, saddr, info->key.u.ipv4.dst,
tos, ttl, df, sport, geneve->cfg.info.key.tp_dst,
!net_eq(geneve->net, dev_net(geneve->dev)),
!(info->key.tun_flags & TUNNEL_CSUM));
@@ -1137,19 +1100,29 @@ static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
if (ip_tunnel_info_af(info) == AF_INET) {
struct rtable *rt;
- struct flowi4 fl4;
-
struct geneve_sock *gs4 = rcu_dereference(geneve->sock4);
+ bool use_cache;
+ __be32 saddr;
+ u8 tos;
+
+ if (!gs4)
+ return -EIO;
+
+ use_cache = ip_tunnel_dst_cache_usable(skb, info);
+ tos = geneve_get_dsfield(skb, dev, info, &use_cache);
sport = udp_flow_src_port(geneve->net, skb,
1, USHRT_MAX, true);
- rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info,
- geneve->cfg.info.key.tp_dst, sport, NULL);
+ rt = udp_tunnel_dst_lookup(skb, dev, geneve->net, 0, &saddr,
+ &info->key,
+ sport, geneve->cfg.info.key.tp_dst,
+ tos,
+ use_cache ? &info->dst_cache : NULL);
if (IS_ERR(rt))
return PTR_ERR(rt);
ip_rt_put(rt);
- info->key.u.ipv4.src = fl4.saddr;
+ info->key.u.ipv4.src = saddr;
#if IS_ENABLED(CONFIG_IPV6)
} else if (ip_tunnel_info_af(info) == AF_INET6) {
struct dst_entry *dst;
diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index ece377b1b6bd..6f7d45e3cfa2 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -2215,57 +2215,6 @@ static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst,
return 0;
}
-static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, struct net_device *dev,
- struct vxlan_sock *sock4,
- struct sk_buff *skb, int oif, u8 tos,
- __be32 daddr, __be32 *saddr, __be16 dport, __be16 sport,
- __u8 flow_flags, struct dst_cache *dst_cache,
- const struct ip_tunnel_info *info)
-{
- bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
- struct rtable *rt = NULL;
- struct flowi4 fl4;
-
- if (!sock4)
- return ERR_PTR(-EIO);
-
- if (tos && !info)
- use_cache = false;
- if (use_cache) {
- rt = dst_cache_get_ip4(dst_cache, saddr);
- if (rt)
- return rt;
- }
-
- memset(&fl4, 0, sizeof(fl4));
- fl4.flowi4_oif = oif;
- fl4.flowi4_tos = RT_TOS(tos);
- fl4.flowi4_mark = skb->mark;
- fl4.flowi4_proto = IPPROTO_UDP;
- fl4.daddr = daddr;
- fl4.saddr = *saddr;
- fl4.fl4_dport = dport;
- fl4.fl4_sport = sport;
- fl4.flowi4_flags = flow_flags;
-
- rt = ip_route_output_key(vxlan->net, &fl4);
- if (!IS_ERR(rt)) {
- if (rt->dst.dev == dev) {
- netdev_dbg(dev, "circular route to %pI4\n", &daddr);
- ip_rt_put(rt);
- return ERR_PTR(-ELOOP);
- }
-
- *saddr = fl4.saddr;
- if (use_cache)
- dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr);
- } else {
- netdev_dbg(dev, "no route to %pI4\n", &daddr);
- return ERR_PTR(-ENETUNREACH);
- }
- return rt;
-}
-
#if IS_ENABLED(CONFIG_IPV6)
static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan,
struct net_device *dev,
@@ -2418,30 +2367,38 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
{
struct dst_cache *dst_cache;
struct ip_tunnel_info *info;
+ struct ip_tunnel_key *pkey;
+ struct ip_tunnel_key key;
struct vxlan_dev *vxlan = netdev_priv(dev);
const struct iphdr *old_iph = ip_hdr(skb);
union vxlan_addr *dst;
- union vxlan_addr remote_ip, local_ip;
+ union vxlan_addr remote_ip;
struct vxlan_metadata _md;
struct vxlan_metadata *md = &_md;
unsigned int pkt_len = skb->len;
__be16 src_port = 0, dst_port;
struct dst_entry *ndst = NULL;
- __u8 tos, ttl, flow_flags = 0;
+ __u8 tos, ttl;
int ifindex;
int err;
u32 flags = vxlan->cfg.flags;
+ bool use_cache;
bool udp_sum = false;
bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev));
__be32 vni = 0;
#if IS_ENABLED(CONFIG_IPV6)
+ union vxlan_addr local_ip;
__be32 label;
#endif
info = skb_tunnel_info(skb);
+ use_cache = ip_tunnel_dst_cache_usable(skb, info);
if (rdst) {
dst = &rdst->remote_ip;
+ memset(&key, 0, sizeof(key));
+ pkey = &key;
+
if (vxlan_addr_any(dst)) {
if (did_rsc) {
/* short-circuited back to local bridge */
@@ -2455,7 +2412,15 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port;
vni = (rdst->remote_vni) ? : default_vni;
ifindex = rdst->remote_ifindex;
- local_ip = vxlan->cfg.saddr;
+
+ if (dst->sa.sa_family == AF_INET) {
+ key.u.ipv4.src = vxlan->cfg.saddr.sin.sin_addr.s_addr;
+ key.u.ipv4.dst = rdst->remote_ip.sin.sin_addr.s_addr;
+ } else {
+ key.u.ipv6.src = vxlan->cfg.saddr.sin6.sin6_addr;
+ key.u.ipv6.dst = rdst->remote_ip.sin6.sin6_addr;
+ }
+
dst_cache = &rdst->dst_cache;
md->gbp = skb->mark;
if (flags & VXLAN_F_TTL_INHERIT) {
@@ -2469,12 +2434,15 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
tos = vxlan->cfg.tos;
if (tos == 1)
tos = ip_tunnel_get_dsfield(old_iph, skb);
+ if (tos && !info)
+ use_cache = false;
if (dst->sa.sa_family == AF_INET)
udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX);
else
udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);
#if IS_ENABLED(CONFIG_IPV6)
+ local_ip = vxlan->cfg.saddr;
label = vxlan->cfg.label;
#endif
} else {
@@ -2486,14 +2454,15 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
remote_ip.sa.sa_family = ip_tunnel_info_af(info);
if (remote_ip.sa.sa_family == AF_INET) {
remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst;
- local_ip.sin.sin_addr.s_addr = info->key.u.ipv4.src;
} else {
remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst;
+#if IS_ENABLED(CONFIG_IPV6)
local_ip.sin6.sin6_addr = info->key.u.ipv6.src;
+#endif
}
dst = &remote_ip;
+ pkey = &info->key;
dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
- flow_flags = info->key.flow_flags;
vni = tunnel_id_to_key32(info->key.tun_id);
ifindex = 0;
dst_cache = &info->dst_cache;
@@ -2517,15 +2486,14 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock);
struct rtable *rt;
__be16 df = 0;
+ __be32 saddr;
if (!ifindex)
ifindex = sock4->sock->sk->sk_bound_dev_if;
- rt = vxlan_get_route(vxlan, dev, sock4, skb, ifindex, tos,
- dst->sin.sin_addr.s_addr,
- &local_ip.sin.sin_addr.s_addr,
- dst_port, src_port, flow_flags,
- dst_cache, info);
+ rt = udp_tunnel_dst_lookup(skb, dev, vxlan->net, ifindex,
+ &saddr, pkey, src_port, dst_port,
+ tos, use_cache ? dst_cache : NULL);
if (IS_ERR(rt)) {
err = PTR_ERR(rt);
goto tx_error;
@@ -2561,16 +2529,13 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
} else if (err) {
if (info) {
struct ip_tunnel_info *unclone;
- struct in_addr src, dst;
unclone = skb_tunnel_info_unclone(skb);
if (unlikely(!unclone))
goto tx_error;
- src = remote_ip.sin.sin_addr;
- dst = local_ip.sin.sin_addr;
- unclone->key.u.ipv4.src = src.s_addr;
- unclone->key.u.ipv4.dst = dst.s_addr;
+ unclone->key.u.ipv4.src = pkey->u.ipv4.dst;
+ unclone->key.u.ipv4.dst = saddr;
}
vxlan_encap_bypass(skb, vxlan, vxlan, vni, false);
dst_release(ndst);
@@ -2584,8 +2549,8 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
if (err < 0)
goto tx_error;
- udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, local_ip.sin.sin_addr.s_addr,
- dst->sin.sin_addr.s_addr, tos, ttl, df,
+ udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, saddr,
+ pkey->u.ipv4.dst, tos, ttl, df,
src_port, dst_port, xnet, !udp_sum);
#if IS_ENABLED(CONFIG_IPV6)
} else {
@@ -3286,11 +3251,14 @@ static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock);
struct rtable *rt;
- rt = vxlan_get_route(vxlan, dev, sock4, skb, 0, info->key.tos,
- info->key.u.ipv4.dst,
- &info->key.u.ipv4.src, dport, sport,
- info->key.flow_flags, &info->dst_cache,
- info);
+ if (!sock4)
+ return -EIO;
+
+ rt = udp_tunnel_dst_lookup(skb, dev, vxlan->net, 0,
+ &info->key.u.ipv4.src,
+ &info->key,
+ sport, dport, info->key.tos,
+ &info->dst_cache);
if (IS_ERR(rt))
return PTR_ERR(rt);
ip_rt_put(rt);
diff --git a/include/net/route.h b/include/net/route.h
index 5c248a8e3d0e..980ab474eabd 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -136,12 +136,6 @@ static inline struct rtable *__ip_route_output_key(struct net *net,
struct rtable *ip_route_output_flow(struct net *, struct flowi4 *flp,
const struct sock *sk);
-struct rtable *ip_route_output_tunnel(struct sk_buff *skb,
- struct net_device *dev,
- struct net *net, __be32 *saddr,
- const struct ip_tunnel_info *info,
- u8 protocol, bool use_cache);
-
struct dst_entry *ipv4_blackhole_route(struct net *net,
struct dst_entry *dst_orig);
diff --git a/include/net/udp_tunnel.h b/include/net/udp_tunnel.h
index 21ba0a25f936..4d0578fab01a 100644
--- a/include/net/udp_tunnel.h
+++ b/include/net/udp_tunnel.h
@@ -162,6 +162,14 @@ int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
void udp_tunnel_sock_release(struct socket *sock);
+struct rtable *udp_tunnel_dst_lookup(struct sk_buff *skb,
+ struct net_device *dev,
+ struct net *net, int oif,
+ __be32 *saddr,
+ const struct ip_tunnel_key *key,
+ __be16 sport, __be16 dport, u8 tos,
+ struct dst_cache *dst_cache);
+
struct metadata_dst *udp_tun_rx_dst(struct sk_buff *skb, unsigned short family,
__be16 flags, __be64 tunnel_id,
int md_size);
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index e2bf4602b559..3290a4442b4a 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2885,54 +2885,6 @@ struct rtable *ip_route_output_flow(struct net *net, struct flowi4 *flp4,
}
EXPORT_SYMBOL_GPL(ip_route_output_flow);
-struct rtable *ip_route_output_tunnel(struct sk_buff *skb,
- struct net_device *dev,
- struct net *net, __be32 *saddr,
- const struct ip_tunnel_info *info,
- u8 protocol, bool use_cache)
-{
-#ifdef CONFIG_DST_CACHE
- struct dst_cache *dst_cache;
-#endif
- struct rtable *rt = NULL;
- struct flowi4 fl4;
- __u8 tos;
-
-#ifdef CONFIG_DST_CACHE
- dst_cache = (struct dst_cache *)&info->dst_cache;
- if (use_cache) {
- rt = dst_cache_get_ip4(dst_cache, saddr);
- if (rt)
- return rt;
- }
-#endif
- memset(&fl4, 0, sizeof(fl4));
- fl4.flowi4_mark = skb->mark;
- fl4.flowi4_proto = protocol;
- fl4.daddr = info->key.u.ipv4.dst;
- fl4.saddr = info->key.u.ipv4.src;
- tos = info->key.tos;
- fl4.flowi4_tos = RT_TOS(tos);
-
- rt = ip_route_output_key(net, &fl4);
- if (IS_ERR(rt)) {
- netdev_dbg(dev, "no route to %pI4\n", &fl4.daddr);
- return ERR_PTR(-ENETUNREACH);
- }
- if (rt->dst.dev == dev) { /* is this necessary? */
- netdev_dbg(dev, "circular route to %pI4\n", &fl4.daddr);
- ip_rt_put(rt);
- return ERR_PTR(-ELOOP);
- }
-#ifdef CONFIG_DST_CACHE
- if (use_cache)
- dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr);
-#endif
- *saddr = fl4.saddr;
- return rt;
-}
-EXPORT_SYMBOL_GPL(ip_route_output_tunnel);
-
/* called with rcu_read_lock held */
static int rt_fill_info(struct net *net, __be32 dst, __be32 src,
struct rtable *rt, u32 table_id, struct flowi4 *fl4,
diff --git a/net/ipv4/udp_tunnel_core.c b/net/ipv4/udp_tunnel_core.c
index 1e7e4aecdc48..a87defb2b167 100644
--- a/net/ipv4/udp_tunnel_core.c
+++ b/net/ipv4/udp_tunnel_core.c
@@ -204,4 +204,53 @@ struct metadata_dst *udp_tun_rx_dst(struct sk_buff *skb, unsigned short family,
}
EXPORT_SYMBOL_GPL(udp_tun_rx_dst);
+struct rtable *udp_tunnel_dst_lookup(struct sk_buff *skb,
+ struct net_device *dev,
+ struct net *net, int oif,
+ __be32 *saddr,
+ const struct ip_tunnel_key *key,
+ __be16 sport, __be16 dport, u8 tos,
+ struct dst_cache *dst_cache)
+{
+ struct rtable *rt = NULL;
+ struct flowi4 fl4;
+
+#ifdef CONFIG_DST_CACHE
+ if (dst_cache) {
+ rt = dst_cache_get_ip4(dst_cache, saddr);
+ if (rt)
+ return rt;
+ }
+#endif
+
+ memset(&fl4, 0, sizeof(fl4));
+ fl4.flowi4_mark = skb->mark;
+ fl4.flowi4_proto = IPPROTO_UDP;
+ fl4.flowi4_oif = oif;
+ fl4.daddr = key->u.ipv4.dst;
+ fl4.saddr = key->u.ipv4.src;
+ fl4.fl4_dport = dport;
+ fl4.fl4_sport = sport;
+ fl4.flowi4_tos = RT_TOS(tos);
+ fl4.flowi4_flags = key->flow_flags;
+
+ rt = ip_route_output_key(net, &fl4);
+ if (IS_ERR(rt)) {
+ netdev_dbg(dev, "no route to %pI4\n", &fl4.daddr);
+ return ERR_PTR(-ENETUNREACH);
+ }
+ if (rt->dst.dev == dev) { /* is this necessary? */
+ netdev_dbg(dev, "circular route to %pI4\n", &fl4.daddr);
+ ip_rt_put(rt);
+ return ERR_PTR(-ELOOP);
+ }
+#ifdef CONFIG_DST_CACHE
+ if (dst_cache)
+ dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr);
+#endif
+ *saddr = fl4.saddr;
+ return rt;
+}
+EXPORT_SYMBOL_GPL(udp_tunnel_dst_lookup);
+
MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2025-12-24 08:48:46 +0000