gre: move to a plugin

Move GRE folder under vnet to the plugin folder, and modify some of path
of the #inlude<header> to the new path.

Add a plugin.c file to register a plugin.

JIRA: VPP-2044

Type: improvement
Change-Id: I7f64cecd97538a7492e56a41558dab58281a9fa5
Signed-off-by: Chuhao Tang <nicotang@cisco.com>

1 files changed, 0 insertions, 443 deletions

diff --git a/src/vnet/gre/gre.h b/src/vnet/gre/gre.h
deleted file mode 100644
index ea085bf0fa1..00000000000
--- a/src/vnet/gre/gre.h
+++ /dev/null
@@ -1,443 +0,0 @@
-/*
- * gre.h: types/functions for gre.
- *
- * Copyright (c) 2012 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef included_gre_h
-#define included_gre_h
-
-#include <vnet/vnet.h>
-#include <vnet/gre/packet.h>
-#include <vnet/ip/ip.h>
-#include <vnet/ip/format.h>
-#include <vnet/adj/adj_types.h>
-#include <vnet/tunnel/tunnel.h>
-#include <vnet/teib/teib.h>
-
-extern vnet_hw_interface_class_t gre_hw_interface_class;
-extern vnet_hw_interface_class_t mgre_hw_interface_class;
-
-typedef enum
-{
-#define gre_error(n,s) GRE_ERROR_##n,
-#include <vnet/gre/error.def>
-#undef gre_error
-  GRE_N_ERROR,
-} gre_error_t;
-
-/**
- * L3: GRE (i.e. this tunnel is in L3 mode)
- * TEB: Transparent Ethernet Bridging - the tunnel is in L2 mode
- * ERSPAN: type 2 - the tunnel is for port mirror SPAN output. Each tunnel is
- *         associated with a session ID and expected to be used for encap
- *         and output of mirrored packet from a L2 network only. There is
- *         no support for receiving ERSPAN packets from a GRE ERSPAN tunnel
- */
-#define foreach_gre_tunnel_type \
-  _(L3, "L3")                   \
-  _(TEB, "TEB")                 \
-  _(ERSPAN, "ERSPAN")           \
-
-/**
- * @brief The GRE tunnel type
- */
-typedef enum gre_tunnel_type_t_
-{
-#define _(n, s) GRE_TUNNEL_TYPE_##n,
-  foreach_gre_tunnel_type
-#undef _
-} __clib_packed gre_tunnel_type_t;
-
-extern u8 *format_gre_tunnel_type (u8 * s, va_list * args);
-
-
-/**
- * A GRE payload protocol registration
- */
-typedef struct
-{
-  /** Name (a c string). */
-  char *name;
-
-  /** GRE protocol type in host byte order. */
-  gre_protocol_t protocol;
-
-  /** GRE tunnel type */
-  gre_tunnel_type_t tunnel_type;
-
-  /** Node which handles this type. */
-  u32 node_index;
-
-  /** Next index for this type. */
-  u32 next_index;
-} gre_protocol_info_t;
-
-/**
- * Elements of the GRE key that are common for v6 and v6 addresses
- */
-typedef struct gre_tunnel_key_common_t_
-{
-  union
-  {
-    struct
-    {
-      u32 fib_index;
-      u16 session_id;
-      gre_tunnel_type_t type;
-      tunnel_mode_t mode;
-    };
-    u64 as_u64;
-  };
-} gre_tunnel_key_common_t;
-
-STATIC_ASSERT_SIZEOF (gre_tunnel_key_common_t, sizeof (u64));
-
-/**
- * @brief Key for a IPv4 GRE Tunnel
- */
-typedef struct gre_tunnel_key4_t_
-{
-  /**
-   * Source and destination IP addresses
-   */
-  union
-  {
-    struct
-    {
-      ip4_address_t gtk_src;
-      ip4_address_t gtk_dst;
-    };
-    u64 gtk_as_u64;
-  };
-
-  /** address independent attributes */
-  gre_tunnel_key_common_t gtk_common;
-} __attribute__ ((packed)) gre_tunnel_key4_t;
-
-STATIC_ASSERT_SIZEOF (gre_tunnel_key4_t, 2 * sizeof (u64));
-
-/**
- * @brief Key for a IPv6 GRE Tunnel
- * We use a different type so that the V4 key hash is as small as possible
- */
-typedef struct gre_tunnel_key6_t_
-{
-  /**
-   * Source and destination IP addresses
-   */
-  ip6_address_t gtk_src;
-  ip6_address_t gtk_dst;
-
-  /** address independent attributes */
-  gre_tunnel_key_common_t gtk_common;
-} __attribute__ ((packed)) gre_tunnel_key6_t;
-
-STATIC_ASSERT_SIZEOF (gre_tunnel_key6_t, 5 * sizeof (u64));
-
-/**
- * Union of the two possible key types
- */
-typedef union gre_tunnel_key_t_
-{
-  gre_tunnel_key4_t gtk_v4;
-  gre_tunnel_key6_t gtk_v6;
-} gre_tunnel_key_t;
-
-/**
- * The session ID is only a 10 bit value
- */
-#define GTK_SESSION_ID_MAX (0x3ff)
-
-/**
- * Used for GRE header seq number generation for ERSPAN encap
- */
-typedef struct
-{
-  u32 seq_num;
-  u32 ref_count;
-} gre_sn_t;
-
-/**
- * Hash key for GRE header seq number generation for ERSPAN encap
- */
-typedef struct
-{
-  ip46_address_t src;
-  ip46_address_t dst;
-  u32 fib_index;
-} gre_sn_key_t;
-
-/**
- * @brief A representation of a GRE tunnel
- */
-typedef struct
-{
-  /**
-   * Required for pool_get_aligned
-   */
-  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
-
-  /**
-   * The tunnel's source/local address
-   */
-  ip46_address_t tunnel_src;
-  /**
-   * The tunnel's destination/remote address
-   */
-  fib_prefix_t tunnel_dst;
-  /**
-   * The FIB in which the src.dst address are present
-   */
-  u32 outer_fib_index;
-  u32 hw_if_index;
-  u32 sw_if_index;
-  gre_tunnel_type_t type;
-  tunnel_mode_t mode;
-  tunnel_encap_decap_flags_t flags;
-
-  /**
-   * an L2 tunnel always rquires an L2 midchain. cache here for DP.
-   */
-  adj_index_t l2_adj_index;
-
-  /**
-   * ERSPAN type 2 session ID, least significant 10 bits of u16
-   */
-  u16 session_id;
-
-  /**
-   * GRE header sequence number (SN) used for ERSPAN type 2 header, must be
-   * bumped automically to be thread safe. As multiple GRE tunnels are created
-   * for the same fib-idx/DIP/SIP with different ERSPAN session number, they all
-   * share the same SN which is kept per FIB/DIP/SIP, as specified by RFC2890.
-   */
-  gre_sn_t *gre_sn;
-
-
-  u32 dev_instance;		/* Real device instance in tunnel vector */
-  u32 user_instance;		/* Instance name being shown to user */
-} gre_tunnel_t;
-
-typedef struct
-{
-  u8 next_index;
-  u8 tunnel_type;
-} next_info_t;
-
-/**
- * @brief GRE related global data
- */
-typedef struct
-{
-  /**
-   * pool of tunnel instances
-   */
-  gre_tunnel_t *tunnels;
-
-  /**
-   * GRE payload protocol registrations
-   */
-  gre_protocol_info_t *protocol_infos;
-
-  /**
-   *  Hash tables mapping name/protocol to protocol info index.
-   */
-  uword *protocol_info_by_name, *protocol_info_by_protocol;
-
-  /**
-   * Hash mapping to tunnels with ipv4 src/dst addr
-   */
-  uword *tunnel_by_key4;
-
-  /**
-   * Hash mapping to tunnels with ipv6 src/dst addr
-   */
-  uword *tunnel_by_key6;
-
-  /**
-   * Hash mapping tunnel src/dst addr and fib-idx to sequence number
-   */
-  uword *seq_num_by_key;
-
-  /**
-   * Mapping from sw_if_index to tunnel index
-   */
-  u32 *tunnel_index_by_sw_if_index;
-
-  /* Sparse vector mapping gre protocol in network byte order
-     to next index. */
-  next_info_t *next_by_protocol;
-
-  /* convenience */
-  vlib_main_t *vlib_main;
-  vnet_main_t *vnet_main;
-
-  /* Record used instances */
-  uword *instance_used;
-
-  u16 msg_id_base;
-} gre_main_t;
-
-/**
- * @brief IPv4 and GRE header.
- */
-/* *INDENT-OFF* */
-typedef CLIB_PACKED (struct {
-  ip4_header_t ip4;
-  gre_header_t gre;
-}) ip4_and_gre_header_t;
-/* *INDENT-ON* */
-
-/**
- * @brief IPv6 and GRE header.
- */
-/* *INDENT-OFF* */
-typedef CLIB_PACKED (struct {
-  ip6_header_t ip6;
-  gre_header_t gre;
-}) ip6_and_gre_header_t;
-/* *INDENT-ON* */
-
-always_inline gre_protocol_info_t *
-gre_get_protocol_info (gre_main_t * em, gre_protocol_t protocol)
-{
-  uword *p = hash_get (em->protocol_info_by_protocol, protocol);
-  return p ? vec_elt_at_index (em->protocol_infos, p[0]) : 0;
-}
-
-extern gre_main_t gre_main;
-
-extern clib_error_t *gre_interface_admin_up_down (vnet_main_t * vnm,
-						  u32 hw_if_index, u32 flags);
-
-extern void gre_tunnel_stack (adj_index_t ai);
-extern void gre_update_adj (vnet_main_t * vnm,
-			    u32 sw_if_index, adj_index_t ai);
-
-typedef struct mgre_walk_ctx_t_
-{
-  const gre_tunnel_t *t;
-  const teib_entry_t *ne;
-} mgre_walk_ctx_t;
-
-adj_walk_rc_t mgre_mk_complete_walk (adj_index_t ai, void *data);
-adj_walk_rc_t mgre_mk_incomplete_walk (adj_index_t ai, void *data);
-
-format_function_t format_gre_protocol;
-format_function_t format_gre_header;
-format_function_t format_gre_header_with_length;
-
-extern vlib_node_registration_t gre4_input_node;
-extern vlib_node_registration_t gre6_input_node;
-extern vlib_node_registration_t gre_erspan_encap_node;
-extern vlib_node_registration_t gre_teb_encap_node;
-extern vnet_device_class_t gre_device_class;
-
-/* Parse gre protocol as 0xXXXX or protocol name.
-   In either host or network byte order. */
-unformat_function_t unformat_gre_protocol_host_byte_order;
-unformat_function_t unformat_gre_protocol_net_byte_order;
-
-/* Parse gre header. */
-unformat_function_t unformat_gre_header;
-unformat_function_t unformat_pg_gre_header;
-
-void
-gre_register_input_protocol (vlib_main_t * vm, gre_protocol_t protocol,
-			     u32 node_index, gre_tunnel_type_t tunnel_type);
-
-/* manually added to the interface output node in gre.c */
-#define GRE_OUTPUT_NEXT_LOOKUP	1
-
-typedef struct
-{
-  u8 is_add;
-  gre_tunnel_type_t type;
-  tunnel_mode_t mode;
-  u8 is_ipv6;
-  u32 instance;
-  ip46_address_t src, dst;
-  u32 outer_table_id;
-  u16 session_id;
-  tunnel_encap_decap_flags_t flags;
-} vnet_gre_tunnel_add_del_args_t;
-
-extern int vnet_gre_tunnel_add_del (vnet_gre_tunnel_add_del_args_t * a,
-				    u32 * sw_if_indexp);
-
-static inline void
-gre_mk_key4 (ip4_address_t src,
-	     ip4_address_t dst,
-	     u32 fib_index,
-	     gre_tunnel_type_t ttype,
-	     tunnel_mode_t tmode, u16 session_id, gre_tunnel_key4_t * key)
-{
-  key->gtk_src = src;
-  key->gtk_dst = dst;
-  key->gtk_common.type = ttype;
-  key->gtk_common.mode = tmode;
-  key->gtk_common.fib_index = fib_index;
-  key->gtk_common.session_id = session_id;
-}
-
-static inline int
-gre_match_key4 (const gre_tunnel_key4_t * key1,
-		const gre_tunnel_key4_t * key2)
-{
-  return ((key1->gtk_as_u64 == key2->gtk_as_u64) &&
-	  (key1->gtk_common.as_u64 == key2->gtk_common.as_u64));
-}
-
-static inline void
-gre_mk_key6 (const ip6_address_t * src,
-	     const ip6_address_t * dst,
-	     u32 fib_index,
-	     gre_tunnel_type_t ttype,
-	     tunnel_mode_t tmode, u16 session_id, gre_tunnel_key6_t * key)
-{
-  key->gtk_src = *src;
-  key->gtk_dst = *dst;
-  key->gtk_common.type = ttype;
-  key->gtk_common.mode = tmode;
-  key->gtk_common.fib_index = fib_index;
-  key->gtk_common.session_id = session_id;
-}
-
-static inline int
-gre_match_key6 (const gre_tunnel_key6_t * key1,
-		const gre_tunnel_key6_t * key2)
-{
-  return (ip6_address_is_equal (&key1->gtk_src, &key2->gtk_src) &&
-	  ip6_address_is_equal (&key1->gtk_dst, &key2->gtk_dst) &&
-	  (key1->gtk_common.as_u64 == key2->gtk_common.as_u64));
-}
-
-static inline void
-gre_mk_sn_key (const gre_tunnel_t * gt, gre_sn_key_t * key)
-{
-  key->src = gt->tunnel_src;
-  key->dst = gt->tunnel_dst.fp_addr;
-  key->fib_index = gt->outer_fib_index;
-}
-
-#endif /* included_gre_h */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */