diff options
| -rw-r--r-- | acinclude.m4 | 4 | ||||
| -rw-r--r-- | datapath/linux/compat/gre.c | 11 | ||||
| -rw-r--r-- | datapath/linux/compat/gso.c | 95 | ||||
| -rw-r--r-- | datapath/linux/compat/gso.h | 85 | ||||
| -rw-r--r-- | datapath/linux/compat/include/linux/skbuff.h | 8 | ||||
| -rw-r--r-- | datapath/linux/compat/include/net/gre.h | 2 | ||||
| -rw-r--r-- | datapath/linux/compat/include/net/ip_tunnels.h | 57 | ||||
| -rw-r--r-- | datapath/linux/compat/include/net/vxlan.h | 10 | ||||
| -rw-r--r-- | datapath/linux/compat/ip_tunnels_core.c | 61 | ||||
| -rw-r--r-- | datapath/linux/compat/vxlan.c | 2 |
10 files changed, 165 insertions, 170 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index c2f45cef1..d8b415eeb 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -365,9 +365,6 @@ AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [ OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock], [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])]) OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register]) - OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads]) - OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [iptunnel_xmit.*net], - [OVS_DEFINE([HAVE_IPTUNNEL_XMIT_NET])]) OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH]) OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16]) OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16]) @@ -388,7 +385,6 @@ AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [ OVS_GREP_IFELSE([$KSRC/include/linux/openvswitch.h], [openvswitch_handle_frame_hook], [OVS_DEFINE([HAVE_RHEL_OVS_HOOK])]) - OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [vxlan_xmit_skb]) OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata], [OVS_DEFINE([HAVE_VXLAN_METADATA])]) OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port], diff --git a/datapath/linux/compat/gre.c b/datapath/linux/compat/gre.c index 02551fb3b..7b77d23ed 100644 --- a/datapath/linux/compat/gre.c +++ b/datapath/linux/compat/gre.c @@ -268,9 +268,9 @@ int gre_cisco_unregister(struct gre_cisco_protocol *proto) #endif /* !HAVE_GRE_CISCO_REGISTER */ -#ifndef USE_KERNEL_TUNNEL_API - /* GRE TX side. */ +static void gre_nop_fix(struct sk_buff *skb) { } + static void gre_csum_fix(struct sk_buff *skb) { struct gre_base_hdr *greh; @@ -287,15 +287,15 @@ static void gre_csum_fix(struct sk_buff *skb) struct sk_buff *gre_handle_offloads(struct sk_buff *skb, bool gre_csum) { + int type = gre_csum ? SKB_GSO_GRE_CSUM : SKB_GSO_GRE; gso_fix_segment_t fix_segment; if (gre_csum) fix_segment = gre_csum_fix; else - fix_segment = NULL; + fix_segment = gre_nop_fix; - skb_reset_inner_headers(skb); - return ovs_iptunnel_handle_offloads(skb, gre_csum, fix_segment); + return ovs_iptunnel_handle_offloads(skb, gre_csum, type, fix_segment); } static bool is_gre_gso(struct sk_buff *skb) @@ -332,7 +332,6 @@ void gre_build_header(struct sk_buff *skb, const struct tnl_ptk_info *tpi, } } } -#endif #endif /* CONFIG_NET_IPGRE_DEMUX */ diff --git a/datapath/linux/compat/gso.c b/datapath/linux/compat/gso.c index b20ad8a1f..cad9b182d 100644 --- a/datapath/linux/compat/gso.c +++ b/datapath/linux/compat/gso.c @@ -167,7 +167,9 @@ drop: kfree_skb(skb); return err; } +#endif /* 3.16 */ +#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0) static __be16 __skb_network_protocol(struct sk_buff *skb) { __be16 type = skb->protocol; @@ -190,16 +192,6 @@ static __be16 __skb_network_protocol(struct sk_buff *skb) return type; } -#if LINUX_VERSION_CODE < KERNEL_VERSION(3,12,0) -static void tnl_fix_segment(struct sk_buff *skb) -{ - if (OVS_GSO_CB(skb)->fix_segment) - OVS_GSO_CB(skb)->fix_segment(skb); -} -#else -static void tnl_fix_segment(struct sk_buff *skb) { } -#endif - static struct sk_buff *tnl_skb_gso_segment(struct sk_buff *skb, netdev_features_t features, bool tx_path) @@ -240,7 +232,7 @@ static struct sk_buff *tnl_skb_gso_segment(struct sk_buff *skb, memcpy(ip_hdr(skb), iph, pkt_hlen); memcpy(skb->cb, cb, sizeof(cb)); - tnl_fix_segment(skb); + OVS_GSO_CB(skb)->fix_segment(skb); skb->protocol = proto; skb = skb->next; @@ -250,11 +242,29 @@ free: return segs; } +static int output_ip(struct sk_buff *skb) +{ + int ret = NETDEV_TX_OK; + int err; + + memset(IPCB(skb), 0, sizeof(*IPCB(skb))); + +#undef ip_local_out + err = ip_local_out(skb); + if (unlikely(net_xmit_eval(err))) + ret = err; + + return ret; +} + int rpl_ip_local_out(struct sk_buff *skb) { int ret = NETDEV_TX_OK; int id = -1; + if (!OVS_GSO_CB(skb)->fix_segment) + return output_ip(skb); + if (skb_is_gso(skb)) { struct iphdr *iph; @@ -274,7 +284,6 @@ int rpl_ip_local_out(struct sk_buff *skb) while (skb) { struct sk_buff *next_skb = skb->next; struct iphdr *iph; - int err; skb->next = NULL; @@ -282,67 +291,9 @@ int rpl_ip_local_out(struct sk_buff *skb) if (id >= 0) iph->id = htons(id++); - memset(IPCB(skb), 0, sizeof(*IPCB(skb))); - -#undef ip_local_out - err = ip_local_out(skb); - if (unlikely(net_xmit_eval(err))) - ret = err; - + ret = output_ip(skb); skb = next_skb; } return ret; } -#endif /* 3.16 */ - -#if LINUX_VERSION_CODE < KERNEL_VERSION(3,12,0) || \ - !defined USE_UPSTREAM_VXLAN -struct sk_buff *ovs_iptunnel_handle_offloads(struct sk_buff *skb, - bool csum_help, - void (*fix_segment)(struct sk_buff *)) -{ - int err; - - /* XXX: synchronize inner header reset for compat and non compat code - * so that we can do it here. - */ - /* - skb_reset_inner_headers(skb); - */ - - /* OVS compat code does not maintain encapsulation bit. - * skb->encapsulation = 1; */ - - if (skb_is_gso(skb)) { - if (skb_is_encapsulated(skb)) { - err = -ENOSYS; - goto error; - } - - OVS_GSO_CB(skb)->fix_segment = fix_segment; - return skb; - } - - /* If packet is not gso and we are resolving any partial checksum, - * clear encapsulation flag. This allows setting CHECKSUM_PARTIAL - * on the outer header without confusing devices that implement - * NETIF_F_IP_CSUM with encapsulation. - */ - /* - if (csum_help) - skb->encapsulation = 0; - */ - - if (skb->ip_summed == CHECKSUM_PARTIAL && csum_help) { - err = skb_checksum_help(skb); - if (unlikely(err)) - goto error; - } else if (skb->ip_summed != CHECKSUM_PARTIAL) - skb->ip_summed = CHECKSUM_NONE; - - return skb; -error: - kfree_skb(skb); - return ERR_PTR(err); -} -#endif /* 3.12 || !USE_UPSTREAM_VXLAN */ +#endif /* 3.18 */ diff --git a/datapath/linux/compat/gso.h b/datapath/linux/compat/gso.h index 023d6d310..337d13a77 100644 --- a/datapath/linux/compat/gso.h +++ b/datapath/linux/compat/gso.h @@ -2,8 +2,7 @@ #define __LINUX_GSO_WRAPPER_H #include <linux/version.h> -#if LINUX_VERSION_CODE < KERNEL_VERSION(3,12,0) || \ - !defined USE_UPSTREAM_VXLAN +#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0) #include <linux/netdevice.h> #include <linux/skbuff.h> @@ -15,75 +14,55 @@ typedef void (*gso_fix_segment_t)(struct sk_buff *); struct ovs_gso_cb { struct ovs_skb_cb dp_cb; gso_fix_segment_t fix_segment; - sk_buff_data_t inner_mac_header; /* Offset from skb->head */ #if LINUX_VERSION_CODE < KERNEL_VERSION(3,11,0) __be16 inner_protocol; #endif - u16 inner_network_header; /* Offset from - * inner_mac_header */ +#if LINUX_VERSION_CODE < KERNEL_VERSION(3,10,0) + unsigned int inner_mac_header; +#endif +#if LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0) + unsigned int inner_network_header; +#endif }; #define OVS_GSO_CB(skb) ((struct ovs_gso_cb *)(skb)->cb) -#define skb_inner_network_header rpl_skb_inner_network_header +#endif -#ifdef NET_SKBUFF_DATA_USES_OFFSET -#define skb_inner_mac_header rpl_skb_inner_mac_header +#if LINUX_VERSION_CODE < KERNEL_VERSION(3,10,0) static inline unsigned char *skb_inner_mac_header(const struct sk_buff *skb) { return skb->head + OVS_GSO_CB(skb)->inner_mac_header; } -#else - -#define skb_inner_mac_header rpl_skb_inner_mac_header -static inline unsigned char *skb_inner_mac_header(const struct sk_buff *skb) +static inline void skb_set_inner_mac_header(const struct sk_buff *skb, + int offset) { - return OVS_GSO_CB(skb)->inner_mac_header; + OVS_GSO_CB(skb)->inner_mac_header = (skb->data - skb->head) + offset; } - #endif -#define skb_inner_network_header rpl_skb_inner_network_header +#if LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0) static inline unsigned char *skb_inner_network_header(const struct sk_buff *skb) { - return skb_inner_mac_header(skb) + - OVS_GSO_CB(skb)->inner_network_header; + return skb->head + OVS_GSO_CB(skb)->inner_network_header; } -#define skb_inner_network_offset rpl_skb_inner_network_offset static inline int skb_inner_network_offset(const struct sk_buff *skb) { return skb_inner_network_header(skb) - skb->data; } -#define skb_reset_inner_headers rpl_skb_reset_inner_headers -static inline void skb_reset_inner_headers(struct sk_buff *skb) +static inline void skb_set_inner_network_header(const struct sk_buff *skb, + int offset) { - BUILD_BUG_ON(sizeof(struct ovs_gso_cb) > FIELD_SIZEOF(struct sk_buff, cb)); - OVS_GSO_CB(skb)->inner_network_header = skb->network_header - - skb->mac_header; - OVS_GSO_CB(skb)->inner_mac_header = skb->mac_header; - - OVS_GSO_CB(skb)->fix_segment = NULL; + OVS_GSO_CB(skb)->inner_network_header = (skb->data - skb->head) + + offset; } -struct sk_buff *ovs_iptunnel_handle_offloads(struct sk_buff *skb, - bool csum_help, - gso_fix_segment_t fix_segment); - - -#endif /* 3.12 || !USE_UPSTREAM_VXLAN */ - -#if LINUX_VERSION_CODE < KERNEL_VERSION(3,16,0) -#define ip_local_out rpl_ip_local_out -int ip_local_out(struct sk_buff *skb); - -#define skb_inner_mac_offset rpl_skb_inner_mac_offset -static inline int skb_inner_mac_offset(const struct sk_buff *skb) -{ - return skb_inner_mac_header(skb) - skb->data; -} -#endif /* 3.16 */ +static inline void skb_set_inner_transport_header(const struct sk_buff *skb, + int offset) +{ } +#endif #if LINUX_VERSION_CODE < KERNEL_VERSION(3,11,0) static inline void ovs_skb_init_inner_protocol(struct sk_buff *skb) { @@ -128,4 +107,24 @@ static inline __be16 ovs_skb_get_inner_protocol(struct sk_buff *skb) return skb->inner_protocol; } #endif /* 3.11 */ + +#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0) +#define ip_local_out rpl_ip_local_out +int ip_local_out(struct sk_buff *skb); + +static inline int skb_inner_mac_offset(const struct sk_buff *skb) +{ + return skb_inner_mac_header(skb) - skb->data; +} + +#define skb_reset_inner_headers rpl_skb_reset_inner_headers +static inline void skb_reset_inner_headers(struct sk_buff *skb) +{ + BUILD_BUG_ON(sizeof(struct ovs_gso_cb) > FIELD_SIZEOF(struct sk_buff, cb)); + skb_set_inner_mac_header(skb, skb_mac_header(skb) - skb->data); + skb_set_inner_network_header(skb, skb_network_offset(skb)); + skb_set_inner_transport_header(skb, skb_transport_offset(skb)); +} +#endif /* 3.18 */ + #endif diff --git a/datapath/linux/compat/include/linux/skbuff.h b/datapath/linux/compat/include/linux/skbuff.h index 9cf915997..20a575c96 100644 --- a/datapath/linux/compat/include/linux/skbuff.h +++ b/datapath/linux/compat/include/linux/skbuff.h @@ -6,6 +6,14 @@ #include <linux/jhash.h> #include <linux/version.h> +#if LINUX_VERSION_CODE < KERNEL_VERSION(3,9,0) +#define SKB_GSO_GRE 0 +#endif + +#if LINUX_VERSION_CODE < KERNEL_VERSION(3,16,0) +#define SKB_GSO_GRE_CSUM 0 +#endif + #ifndef HAVE_IGNORE_DF_RENAME #define ignore_df local_df #endif diff --git a/datapath/linux/compat/include/net/gre.h b/datapath/linux/compat/include/net/gre.h index af1d991c7..08f6ee1b1 100644 --- a/datapath/linux/compat/include/net/gre.h +++ b/datapath/linux/compat/include/net/gre.h @@ -81,7 +81,7 @@ static inline __be16 tnl_flags_to_gre_flags(__be16 tflags) #endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,10,0) */ #endif /* HAVE_GRE_CISCO_REGISTER */ -#ifndef USE_KERNEL_TUNNEL_API +#if LINUX_VERSION_CODE < KERNEL_VERSION(3,12,0) #define gre_build_header rpl_gre_build_header void gre_build_header(struct sk_buff *skb, const struct tnl_ptk_info *tpi, diff --git a/datapath/linux/compat/include/net/ip_tunnels.h b/datapath/linux/compat/include/net/ip_tunnels.h index 74c6a2ccc..bb96ec318 100644 --- a/datapath/linux/compat/include/net/ip_tunnels.h +++ b/datapath/linux/compat/include/net/ip_tunnels.h @@ -2,34 +2,12 @@ #define __NET_IP_TUNNELS_WRAPPER_H 1 #include <linux/version.h> -#if defined(HAVE_GRE_HANDLE_OFFLOADS) && \ - LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0) && \ - defined(HAVE_VXLAN_XMIT_SKB) -/* RHEL6 and RHEL7 both has backported tunnel API but RHEL6 has - * older version, so avoid using RHEL6 backports. - */ -#define USE_KERNEL_TUNNEL_API -#endif -#ifdef USE_KERNEL_TUNNEL_API +#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0) #include_next <net/ip_tunnels.h> - -#if LINUX_VERSION_CODE < KERNEL_VERSION(3,15,0) -static inline int rpl_iptunnel_xmit(struct sock *sk, struct rtable *rt, - struct sk_buff *skb, __be32 src, - __be32 dst, __u8 proto, __u8 tos, - __u8 ttl, __be16 df, bool xnet) -{ -#ifdef HAVE_IPTUNNEL_XMIT_NET - return iptunnel_xmit(NULL, rt, skb, src, dst, proto, tos, ttl, df); -#else - return iptunnel_xmit(rt, skb, src, dst, proto, tos, ttl, df, xnet); -#endif -} -#define iptunnel_xmit rpl_iptunnel_xmit #endif -#else +#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0) #include <linux/if_tunnel.h> #include <linux/netdevice.h> @@ -41,6 +19,26 @@ static inline int rpl_iptunnel_xmit(struct sock *sk, struct rtable *rt, #include <net/ip.h> #include <net/rtnetlink.h> +struct sk_buff *ovs_iptunnel_handle_offloads(struct sk_buff *skb, + bool csum_help, int gso_type_mask, + void (*fix_segment)(struct sk_buff *)); + +#define iptunnel_xmit rpl_iptunnel_xmit +int iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, + __be32 src, __be32 dst, __u8 proto, __u8 tos, __u8 ttl, + __be16 df, bool xnet); + +#define iptunnel_pull_header rpl_iptunnel_pull_header +int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, __be16 inner_proto); + +#else + +#define ovs_iptunnel_handle_offloads(skb, csum_help, gso_type_mask, fix_segment) \ + iptunnel_handle_offloads(skb, csum_help, gso_type_mask) + +#endif /* 3.18 */ + +#ifndef TUNNEL_CSUM #define TUNNEL_CSUM __cpu_to_be16(0x01) #define TUNNEL_ROUTING __cpu_to_be16(0x02) #define TUNNEL_KEY __cpu_to_be16(0x04) @@ -49,7 +47,6 @@ static inline int rpl_iptunnel_xmit(struct sock *sk, struct rtable *rt, #define TUNNEL_REC __cpu_to_be16(0x20) #define TUNNEL_VERSION __cpu_to_be16(0x40) #define TUNNEL_NO_KEY __cpu_to_be16(0x80) -#define TUNNEL_DONT_FRAGMENT __cpu_to_be16(0x0100) struct tnl_ptk_info { __be16 flags; @@ -60,14 +57,10 @@ struct tnl_ptk_info { #define PACKET_RCVD 0 #define PACKET_REJECT 1 +#endif -int iptunnel_xmit(struct sock *sk, struct rtable *rt, - struct sk_buff *skb, - __be32 src, __be32 dst, __u8 proto, - __u8 tos, __u8 ttl, __be16 df, bool xnet); - -int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, __be16 inner_proto); - +#ifndef TUNNEL_DONT_FRAGMENT +#define TUNNEL_DONT_FRAGMENT __cpu_to_be16(0x0100) #endif #ifndef TUNNEL_OAM diff --git a/datapath/linux/compat/include/net/vxlan.h b/datapath/linux/compat/include/net/vxlan.h index 7270eb153..198a1e353 100644 --- a/datapath/linux/compat/include/net/vxlan.h +++ b/datapath/linux/compat/include/net/vxlan.h @@ -8,7 +8,9 @@ #include <linux/version.h> -#ifdef USE_KERNEL_TUNNEL_API +#ifdef HAVE_VXLAN_METADATA +#define USE_UPSTREAM_VXLAN + #include_next <net/vxlan.h> #endif @@ -81,9 +83,7 @@ struct vxlanhdr_gbp { #define VXLAN_F_RCV_FLAGS VXLAN_F_GBP #endif -#ifdef HAVE_VXLAN_METADATA -#define USE_UPSTREAM_VXLAN - +#ifdef USE_UPSTREAM_VXLAN static inline int rpl_vxlan_xmit_skb(struct vxlan_sock *vs, struct rtable *rt, struct sk_buff *skb, __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, @@ -100,7 +100,7 @@ static inline int rpl_vxlan_xmit_skb(struct vxlan_sock *vs, } #define vxlan_xmit_skb rpl_vxlan_xmit_skb -#else /* HAVE_VXLAN_METADATA */ +#else /* USE_UPSTREAM_VXLAN */ struct vxlan_metadata { __be32 vni; diff --git a/datapath/linux/compat/ip_tunnels_core.c b/datapath/linux/compat/ip_tunnels_core.c index e71ba4e17..70dd7ec58 100644 --- a/datapath/linux/compat/ip_tunnels_core.c +++ b/datapath/linux/compat/ip_tunnels_core.c @@ -35,11 +35,10 @@ #include "compat.h" #include "gso.h" -#ifndef USE_KERNEL_TUNNEL_API -int iptunnel_xmit(struct sock *sk, struct rtable *rt, - struct sk_buff *skb, - __be32 src, __be32 dst, __u8 proto, - __u8 tos, __u8 ttl, __be16 df, bool xnet) +#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0) +int rpl_iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, + __be32 src, __be32 dst, __u8 proto, __u8 tos, __u8 ttl, + __be16 df, bool xnet) { int pkt_len = skb->len; struct iphdr *iph; @@ -82,6 +81,58 @@ int iptunnel_xmit(struct sock *sk, struct rtable *rt, return pkt_len; } +struct sk_buff *ovs_iptunnel_handle_offloads(struct sk_buff *skb, + bool csum_help, int gso_type_mask, + void (*fix_segment)(struct sk_buff *)) +{ + int err; + + if (likely(!skb_is_encapsulated(skb))) { + skb_reset_inner_headers(skb); +#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0) + skb->encapsulation = 1; +#endif + } else if (skb_is_gso(skb)) { + err = -ENOSYS; + goto error; + } + + if (gso_type_mask) + fix_segment = NULL; + + OVS_GSO_CB(skb)->fix_segment = fix_segment; + + if (skb_is_gso(skb)) { + err = skb_unclone(skb, GFP_ATOMIC); + if (unlikely(err)) + goto error; + skb_shinfo(skb)->gso_type |= gso_type_mask; + return skb; + } + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0) + /* If packet is not gso and we are resolving any partial checksum, + * clear encapsulation flag. This allows setting CHECKSUM_PARTIAL + * on the outer header without confusing devices that implement + * NETIF_F_IP_CSUM with encapsulation. + */ + if (csum_help) + skb->encapsulation = 0; +#endif + + if (skb->ip_summed == CHECKSUM_PARTIAL && csum_help) { + err = skb_checksum_help(skb); + if (unlikely(err)) + goto error; + } else if (skb->ip_summed != CHECKSUM_PARTIAL) + skb->ip_summed = CHECKSUM_NONE; + + return skb; +error: + kfree_skb(skb); + return ERR_PTR(err); +} + int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, __be16 inner_proto) { if (unlikely(!pskb_may_pull(skb, hdr_len))) diff --git a/datapath/linux/compat/vxlan.c b/datapath/linux/compat/vxlan.c index 9585c8dd4..7b25aaa02 100644 --- a/datapath/linux/compat/vxlan.c +++ b/datapath/linux/compat/vxlan.c @@ -62,13 +62,11 @@ #include "gso.h" #include "vlan.h" -#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0) /* VXLAN protocol header */ struct vxlanhdr { __be32 vx_flags; __be32 vx_vni; }; -#endif /* Callback from net/ipv4/udp.c to receive packets */ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) |