X-Git-Url: https://gerrit.fd.io/r/gitweb?p=vpp.git;a=blobdiff_plain;f=src%2Fvnet%2Fgre%2Fgre.h;h=0cc60b87eebc1c4a3cec6f134a28cfab4554256d;hp=ad3e025a0ff001056f10a7687afa2038e3309f64;hb=e5b94dded;hpb=7eac916e1b00d6a3393a09925e1634d71bf30568 diff --git a/src/vnet/gre/gre.h b/src/vnet/gre/gre.h index ad3e025a0ff..0cc60b87eeb 100644 --- a/src/vnet/gre/gre.h +++ b/src/vnet/gre/gre.h @@ -24,26 +24,60 @@ #include #include #include +#include +#include extern vnet_hw_interface_class_t gre_hw_interface_class; +extern vnet_hw_interface_class_t mgre_hw_interface_class; -typedef enum { +typedef enum +{ #define gre_error(n,s) GRE_ERROR_##n, #include #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 { +typedef struct +{ /** Name (a c string). */ - char * name; + 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; @@ -52,35 +86,109 @@ typedef struct { } gre_protocol_info_t; /** - * @brief The GRE tunnel type + * 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 enum gre_tunnel_tyoe_t_ +typedef struct gre_tunnel_key4_t_ { /** - * L3 GRE (i.e. this tunnel is in L3 mode) + * Source and destination IP addresses */ - GRE_TUNNEL_TYPE_L3, + 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_ +{ /** - * Transparent Ethernet Bridging - the tunnel is in L2 mode + * Source and destination IP addresses */ - GRE_TUNNEL_TYPE_TEB, -} gre_tunnel_type_t; + ip6_address_t gtk_src; + ip6_address_t gtk_dst; -#define GRE_TUNNEL_TYPE_NAMES { \ - [GRE_TUNNEL_TYPE_L3] = "L3", \ - [GRE_TUNNEL_TYPE_TEB] = "TEB", \ -} + /** 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; -#define GRE_TUNNEL_N_TYPES ((gre_tunnel_type_t)GRE_TUNNEL_TYPE_TEB+1) +/** + * 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 { +typedef struct +{ /** - * Linkage into the FIB object graph + * Required for pool_get_aligned */ - fib_node_t node; + CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); /** * The tunnel's source/local address @@ -97,35 +205,43 @@ typedef struct { u32 hw_if_index; u32 sw_if_index; gre_tunnel_type_t type; + tunnel_mode_t mode; + tunnel_encap_decap_flags_t flags; /** - * The FIB entry sourced by the tunnel for its destination prefix + * an L2 tunnel always rquires an L2 midchain. cache here for DP. */ - fib_node_index_t fib_entry_index; + adj_index_t l2_adj_index; /** - * The tunnel is a child of the FIB entry for its desintion. This is - * so it receives updates when the forwarding information for that entry - * changes. - * The tunnels sibling index on the FIB entry's dependency list. + * ERSPAN type 2 session ID, least significant 10 bits of u16 */ - u32 sibling_index; + u16 session_id; /** - * on a L2 tunnel this is the VLIB arc from the L2-tx to the l2-midchain + * 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. */ - u32 l2_tx_arc; + gre_sn_t *gre_sn; - /** - * an L2 tunnel always rquires an L2 midchain. cache here for DP. - */ - adj_index_t l2_adj_index; + + 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 { +typedef struct +{ /** * pool of tunnel instances */ @@ -134,83 +250,89 @@ typedef struct { /** * GRE payload protocol registrations */ - gre_protocol_info_t * protocol_infos; + gre_protocol_info_t *protocol_infos; /** * Hash tables mapping name/protocol to protocol info index. */ - uword * protocol_info_by_name, * protocol_info_by_protocol; + uword *protocol_info_by_name, *protocol_info_by_protocol; /** - * Hash mapping ipv4 src/dst addr pair to tunnel + * Hash mapping to tunnels with ipv4 src/dst addr */ - uword * tunnel_by_key4; + uword *tunnel_by_key4; /** - * Hash mapping ipv6 src/dst addr pair to tunnel - */ - uword * tunnel_by_key6; + * Hash mapping to tunnels with ipv6 src/dst addr + */ + uword *tunnel_by_key6; /** - * Free vlib hw_if_indices. - * A free list per-tunnel type since the interfaces ctreated are fo different - * types and we cannot change the type. + * Hash mapping tunnel src/dst addr and fib-idx to sequence number */ - u32 * free_gre_tunnel_hw_if_indices[GRE_TUNNEL_N_TYPES]; + uword *seq_num_by_key; /** * Mapping from sw_if_index to tunnel index */ - u32 * tunnel_index_by_sw_if_index; + u32 *tunnel_index_by_sw_if_index; /* Sparse vector mapping gre protocol in network byte order to next index. */ - u16 * next_by_protocol; + next_info_t *next_by_protocol; /* convenience */ - vlib_main_t * vlib_main; - vnet_main_t * vnet_main; + vlib_main_t *vlib_main; + vnet_main_t *vnet_main; + + /* Record used instances */ + uword *instance_used; } 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); + uword *p = hash_get (em->protocol_info_by_protocol, protocol); return p ? vec_elt_at_index (em->protocol_infos, p[0]) : 0; } -gre_main_t gre_main; +extern gre_main_t gre_main; -/* Register given node index to take input for given gre type. */ -void -gre_register_input_type (vlib_main_t * vm, - gre_protocol_t protocol, - u32 node_index); - -extern clib_error_t * gre_interface_admin_up_down (vnet_main_t * vnm, - u32 hw_if_index, - u32 flags); +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); + u32 sw_if_index, adj_index_t ai); + +typedef struct mgre_walk_ctx_t_ +{ + const gre_tunnel_t *t; + const nhrp_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; @@ -218,8 +340,8 @@ 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_encap_node; extern vnet_device_class_t gre_device_class; -extern vnet_device_class_t gre_device_teb_class; /* Parse gre protocol as 0xXXXX or protocol name. In either host or network byte order. */ @@ -231,23 +353,89 @@ 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_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 { +typedef struct +{ u8 is_add; - - ip46_address_t src, dst; + gre_tunnel_type_t type; + tunnel_mode_t mode; u8 is_ipv6; - u32 outer_fib_id; - u8 teb; -} vnet_gre_add_del_tunnel_args_t; + 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)); +} -int vnet_gre_add_del_tunnel - (vnet_gre_add_del_tunnel_args_t *a, u32 * sw_if_indexp); +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: + */