From 1ce8460496c05379c66edc178c3c55ca4e953044 Mon Sep 17 00:00:00 2001 From: Yotam Gigi Date: Wed, 1 Feb 2017 15:30:02 +0200 Subject: net: Introduce ife encapsulation module This module is responsible for the ife encapsulation protocol encode/decode logics. That module can: - ife_encode: encode skb and reserve space for the ife meta header - ife_decode: decode skb and extract the meta header size - ife_tlv_meta_encode - encodes one tlv entry into the reserved ife header space. - ife_tlv_meta_decode - decodes one tlv entry from the packet - ife_tlv_meta_next - advance to the next tlv Reviewed-by: Jiri Pirko Signed-off-by: Yotam Gigi Signed-off-by: Jamal Hadi Salim Signed-off-by: Roman Mashak Signed-off-by: David S. Miller --- include/net/ife.h | 51 +++++++++++++++++++++++++++++++++++++++++++++++ include/uapi/linux/Kbuild | 1 + include/uapi/linux/ife.h | 18 +++++++++++++++++ 3 files changed, 70 insertions(+) create mode 100644 include/net/ife.h create mode 100644 include/uapi/linux/ife.h (limited to 'include') diff --git a/include/net/ife.h b/include/net/ife.h new file mode 100644 index 000000000000..2d87d6898b0a --- /dev/null +++ b/include/net/ife.h @@ -0,0 +1,51 @@ +#ifndef __NET_IFE_H +#define __NET_IFE_H + +#include +#include +#include +#include + +#if IS_ENABLED(CONFIG_NET_IFE) + +void *ife_encode(struct sk_buff *skb, u16 metalen); +void *ife_decode(struct sk_buff *skb, u16 *metalen); + +void *ife_tlv_meta_decode(void *skbdata, u16 *attrtype, u16 *dlen, u16 *totlen); +int ife_tlv_meta_encode(void *skbdata, u16 attrtype, u16 dlen, + const void *dval); + +void *ife_tlv_meta_next(void *skbdata); + +#else + +static inline void *ife_encode(struct sk_buff *skb, u16 metalen) +{ + return NULL; +} + +static inline void *ife_decode(struct sk_buff *skb, u16 *metalen) +{ + return NULL; +} + +static inline void *ife_tlv_meta_decode(void *skbdata, u16 *attrtype, u16 *dlen, + u16 *totlen) +{ + return NULL; +} + +static inline int ife_tlv_meta_encode(void *skbdata, u16 attrtype, u16 dlen, + const void *dval) +{ + return 0; +} + +static inline void *ife_tlv_meta_next(void *skbdata) +{ + return NULL; +} + +#endif + +#endif /* __NET_IFE_H */ diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild index 486e050e64c5..a2e90722a4c4 100644 --- a/include/uapi/linux/Kbuild +++ b/include/uapi/linux/Kbuild @@ -195,6 +195,7 @@ header-y += if_tun.h header-y += if_tunnel.h header-y += if_vlan.h header-y += if_x25.h +header-y += ife.h header-y += igmp.h header-y += ila.h header-y += in6.h diff --git a/include/uapi/linux/ife.h b/include/uapi/linux/ife.h new file mode 100644 index 000000000000..2954da32e012 --- /dev/null +++ b/include/uapi/linux/ife.h @@ -0,0 +1,18 @@ +#ifndef __UAPI_IFE_H +#define __UAPI_IFE_H + +#define IFE_METAHDRLEN 2 + +enum { + IFE_META_SKBMARK = 1, + IFE_META_HASHID, + IFE_META_PRIO, + IFE_META_QMAP, + IFE_META_TCINDEX, + __IFE_META_MAX +}; + +/*Can be overridden at runtime by module option*/ +#define IFE_META_MAX (__IFE_META_MAX - 1) + +#endif -- cgit 1.4.1