X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fgre%2Fgre.c;h=db16fa979cc82e9609d67ac1a0e1937a00941a2c;hb=07bbaef593939e9d03ba131e03296587472514ce;hp=4f16b5db3878bd409f2289bc275e91a84ad896ea;hpb=960eeea7ea48d91c1f2ec3a85a7a84f56619be2a;p=vpp.git diff --git a/src/vnet/gre/gre.c b/src/vnet/gre/gre.c index 4f16b5db387..db16fa979cc 100644 --- a/src/vnet/gre/gre.c +++ b/src/vnet/gre/gre.c @@ -18,6 +18,7 @@ #include #include #include +#include extern gre_main_t gre_main; @@ -213,6 +214,7 @@ gre_build_rewrite (vnet_main_t * vnm, vnet_link_t link_type, const void *dst_address) { gre_main_t *gm = &gre_main; + const ip46_address_t *dst; ip4_and_gre_header_t *h4; ip6_and_gre_header_t *h6; gre_header_t *gre; @@ -221,6 +223,7 @@ gre_build_rewrite (vnet_main_t * vnm, u32 ti; u8 is_ipv6; + dst = dst_address; ti = gm->tunnel_index_by_sw_if_index[sw_if_index]; if (~0 == ti) @@ -241,7 +244,7 @@ gre_build_rewrite (vnet_main_t * vnm, h4->ip4.protocol = IP_PROTOCOL_GRE; /* fixup ip4 header length and checksum after-the-fact */ h4->ip4.src_address.as_u32 = t->tunnel_src.ip4.as_u32; - h4->ip4.dst_address.as_u32 = t->tunnel_dst.fp_addr.ip4.as_u32; + h4->ip4.dst_address.as_u32 = dst->ip4.as_u32; h4->ip4.checksum = ip4_header_checksum (&h4->ip4); } else @@ -256,8 +259,8 @@ gre_build_rewrite (vnet_main_t * vnm, /* fixup ip6 header length and checksum after-the-fact */ h6->ip6.src_address.as_u64[0] = t->tunnel_src.ip6.as_u64[0]; h6->ip6.src_address.as_u64[1] = t->tunnel_src.ip6.as_u64[1]; - h6->ip6.dst_address.as_u64[0] = t->tunnel_dst.fp_addr.ip6.as_u64[0]; - h6->ip6.dst_address.as_u64[1] = t->tunnel_dst.fp_addr.ip6.as_u64[1]; + h6->ip6.dst_address.as_u64[0] = dst->ip6.as_u64[0]; + h6->ip6.dst_address.as_u64[1] = dst->ip6.as_u64[1]; } if (PREDICT_FALSE (t->type == GRE_TUNNEL_TYPE_ERSPAN)) @@ -272,11 +275,45 @@ gre_build_rewrite (vnet_main_t * vnm, return (rewrite); } -#define is_v4_packet(_h) ((*(u8*) _h) & 0xF0) == 0x40 +static void +gre44_fixup (vlib_main_t * vm, + const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data) +{ + tunnel_encap_decap_flags_t flags; + ip4_and_gre_header_t *ip0; + + ip0 = vlib_buffer_get_current (b0); + flags = pointer_to_uword (data); + + /* Fixup the checksum and len fields in the GRE tunnel encap + * that was applied at the midchain node */ + ip0->ip4.length = + clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)); + tunnel_encap_fixup_4o4 (flags, (ip4_header_t *) (ip0 + 1), &ip0->ip4); + ip0->ip4.checksum = ip4_header_checksum (&ip0->ip4); +} + +static void +gre64_fixup (vlib_main_t * vm, + const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data) +{ + tunnel_encap_decap_flags_t flags; + ip4_and_gre_header_t *ip0; + + ip0 = vlib_buffer_get_current (b0); + flags = pointer_to_uword (data); + + /* Fixup the checksum and len fields in the GRE tunnel encap + * that was applied at the midchain node */ + ip0->ip4.length = + clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)); + tunnel_encap_fixup_6o4 (flags, (ip6_header_t *) (ip0 + 1), &ip0->ip4); + ip0->ip4.checksum = ip4_header_checksum (&ip0->ip4); +} static void -gre4_fixup (vlib_main_t * vm, - const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data) +grex4_fixup (vlib_main_t * vm, + const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data) { ip4_header_t *ip0; @@ -289,8 +326,44 @@ gre4_fixup (vlib_main_t * vm, } static void -gre6_fixup (vlib_main_t * vm, - const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data) +gre46_fixup (vlib_main_t * vm, + const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data) +{ + tunnel_encap_decap_flags_t flags; + ip6_and_gre_header_t *ip0; + + ip0 = vlib_buffer_get_current (b0); + flags = pointer_to_uword (data); + + /* Fixup the payload length field in the GRE tunnel encap that was applied + * at the midchain node */ + ip0->ip6.payload_length = + clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) - + sizeof (*ip0)); + tunnel_encap_fixup_4o6 (flags, (ip4_header_t *) (ip0 + 1), &ip0->ip6); +} + +static void +gre66_fixup (vlib_main_t * vm, + const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data) +{ + tunnel_encap_decap_flags_t flags; + ip6_and_gre_header_t *ip0; + + ip0 = vlib_buffer_get_current (b0); + flags = pointer_to_uword (data); + + /* Fixup the payload length field in the GRE tunnel encap that was applied + * at the midchain node */ + ip0->ip6.payload_length = + clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) - + sizeof (*ip0)); + tunnel_encap_fixup_6o6 (flags, (ip6_header_t *) (ip0 + 1), &ip0->ip6); +} + +static void +grex6_fixup (vlib_main_t * vm, + const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data) { ip6_header_t *ip0; @@ -303,29 +376,116 @@ gre6_fixup (vlib_main_t * vm, sizeof (*ip0)); } +/** + * return the appropriate fixup function given the overlay (link-type) and + * underlay (fproto) combination + */ +static adj_midchain_fixup_t +gre_get_fixup (fib_protocol_t fproto, vnet_link_t lt) +{ + if (fproto == FIB_PROTOCOL_IP6 && lt == VNET_LINK_IP6) + return (gre66_fixup); + if (fproto == FIB_PROTOCOL_IP6 && lt == VNET_LINK_IP4) + return (gre46_fixup); + if (fproto == FIB_PROTOCOL_IP4 && lt == VNET_LINK_IP6) + return (gre64_fixup); + if (fproto == FIB_PROTOCOL_IP4 && lt == VNET_LINK_IP4) + return (gre44_fixup); + if (fproto == FIB_PROTOCOL_IP6 && lt == VNET_LINK_ETHERNET) + return (grex6_fixup); + if (fproto == FIB_PROTOCOL_IP4 && lt == VNET_LINK_ETHERNET) + return (grex4_fixup); + + ASSERT (0); + return (gre44_fixup); +} + void gre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai) { gre_main_t *gm = &gre_main; gre_tunnel_t *t; adj_flags_t af; - u8 is_ipv6; u32 ti; ti = gm->tunnel_index_by_sw_if_index[sw_if_index]; t = pool_elt_at_index (gm->tunnels, ti); - is_ipv6 = t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6 ? 1 : 0; af = ADJ_FLAG_MIDCHAIN_IP_STACK; if (VNET_LINK_ETHERNET == adj_get_link_type (ai)) af |= ADJ_FLAG_MIDCHAIN_NO_COUNT; adj_nbr_midchain_update_rewrite - (ai, !is_ipv6 ? gre4_fixup : gre6_fixup, NULL, af, - gre_build_rewrite (vnm, sw_if_index, adj_get_link_type (ai), NULL)); + (ai, gre_get_fixup (t->tunnel_dst.fp_proto, + adj_get_link_type (ai)), + uword_to_pointer (t->flags, void *), af, + gre_build_rewrite (vnm, sw_if_index, adj_get_link_type (ai), + &t->tunnel_dst.fp_addr)); gre_tunnel_stack (ai); } + +adj_walk_rc_t +mgre_mk_complete_walk (adj_index_t ai, void *data) +{ + mgre_walk_ctx_t *ctx = data; + + adj_nbr_midchain_update_rewrite + (ai, gre_get_fixup (ctx->t->tunnel_dst.fp_proto, + adj_get_link_type (ai)), + uword_to_pointer (ctx->t->flags, void *), + ADJ_FLAG_MIDCHAIN_IP_STACK, + gre_build_rewrite (vnet_get_main (), + ctx->t->sw_if_index, + adj_get_link_type (ai), + &teib_entry_get_nh (ctx->ne)->fp_addr)); + + teib_entry_adj_stack (ctx->ne, ai); + + return (ADJ_WALK_RC_CONTINUE); +} + +adj_walk_rc_t +mgre_mk_incomplete_walk (adj_index_t ai, void *data) +{ + gre_tunnel_t *t = data; + + adj_nbr_midchain_update_rewrite (ai, gre_get_fixup (t->tunnel_dst.fp_proto, + adj_get_link_type (ai)), + NULL, ADJ_FLAG_NONE, NULL); + + adj_midchain_delegate_unstack (ai); + + return (ADJ_WALK_RC_CONTINUE); +} + +void +mgre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai) +{ + gre_main_t *gm = &gre_main; + ip_adjacency_t *adj; + teib_entry_t *ne; + gre_tunnel_t *t; + u32 ti; + + adj = adj_get (ai); + ti = gm->tunnel_index_by_sw_if_index[sw_if_index]; + t = pool_elt_at_index (gm->tunnels, ti); + + ne = teib_entry_find (sw_if_index, &adj->sub_type.nbr.next_hop); + + if (NULL == ne) + // no NHRP entry to provide the next-hop + return; + + mgre_walk_ctx_t ctx = { + .t = t, + .ne = ne + }; + adj_nbr_walk_nh (sw_if_index, + adj->ia_nh_proto, + &adj->sub_type.nbr.next_hop, mgre_mk_complete_walk, &ctx); +} #endif /* CLIB_MARCH_VARIANT */ typedef enum @@ -338,8 +498,10 @@ typedef enum * @brief TX function. Only called for L2 payload including TEB or ERSPAN. * L3 traffic uses the adj-midchains. */ -VLIB_NODE_FN (gre_encap_node) (vlib_main_t * vm, vlib_node_runtime_t * node, - vlib_frame_t * frame) +static_always_inline u32 +gre_encap_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, gre_tunnel_type_t type) { gre_main_t *gm = &gre_main; u32 *from, n_left_from; @@ -377,7 +539,7 @@ VLIB_NODE_FN (gre_encap_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = adj_index[0]; vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = adj_index[1]; - if (PREDICT_FALSE (gt[0]->type == GRE_TUNNEL_TYPE_ERSPAN)) + if (type == GRE_TUNNEL_TYPE_ERSPAN) { /* Encap GRE seq# and ERSPAN type II header */ erspan_t2_t *h0; @@ -391,7 +553,7 @@ VLIB_NODE_FN (gre_encap_node) (vlib_main_t * vm, vlib_node_runtime_t * node, h0->t2_u64 = hdr; h0->t2.cos_en_t_session |= clib_host_to_net_u16 (gt[0]->session_id); } - if (PREDICT_FALSE (gt[1]->type == GRE_TUNNEL_TYPE_ERSPAN)) + if (type == GRE_TUNNEL_TYPE_ERSPAN) { /* Encap GRE seq# and ERSPAN type II header */ erspan_t2_t *h0; @@ -444,12 +606,13 @@ VLIB_NODE_FN (gre_encap_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = adj_index[0]; - if (PREDICT_FALSE (gt[0]->type == GRE_TUNNEL_TYPE_ERSPAN)) + if (type == GRE_TUNNEL_TYPE_ERSPAN) { /* Encap GRE seq# and ERSPAN type II header */ erspan_t2_t *h0; u32 seq_num; u64 hdr; + ASSERT (gt[0]->type == GRE_TUNNEL_TYPE_ERSPAN); vlib_buffer_advance (b[0], -sizeof (erspan_t2_t)); h0 = vlib_buffer_get_current (b[0]); seq_num = clib_atomic_fetch_add (>[0]->gre_sn->seq_num, 1); @@ -489,10 +652,37 @@ static char *gre_error_strings[] = { #undef gre_error }; +VLIB_NODE_FN (gre_teb_encap_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (gre_encap_inline (vm, node, frame, GRE_TUNNEL_TYPE_TEB)); +} + +VLIB_NODE_FN (gre_erspan_encap_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (gre_encap_inline (vm, node, frame, GRE_TUNNEL_TYPE_ERSPAN)); +} + /* *INDENT-OFF* */ -VLIB_REGISTER_NODE (gre_encap_node) = +VLIB_REGISTER_NODE (gre_teb_encap_node) = { - .name = "gre-encap", + .name = "gre-teb-encap", + .vector_size = sizeof (u32), + .format_trace = format_gre_tx_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = GRE_N_ERROR, + .error_strings = gre_error_strings, + .n_next_nodes = GRE_ENCAP_N_NEXT, + .next_nodes = { + [GRE_ENCAP_NEXT_L2_MIDCHAIN] = "adj-l2-midchain", + }, +}; +VLIB_REGISTER_NODE (gre_erspan_encap_node) = +{ + .name = "gre-erspan-encap", .vector_size = sizeof (u32), .format_trace = format_gre_tx_trace, .type = VLIB_NODE_TYPE_INTERNAL, @@ -574,6 +764,15 @@ VNET_HW_INTERFACE_CLASS (gre_hw_interface_class) = { .update_adjacency = gre_update_adj, .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P, }; + +VNET_HW_INTERFACE_CLASS (mgre_hw_interface_class) = { + .name = "mGRE", + .format_header = format_gre_header_with_length, + .unformat_header = unformat_gre_header, + .build_rewrite = gre_build_rewrite, + .update_adjacency = mgre_update_adj, + .flags = VNET_HW_INTERFACE_CLASS_FLAG_NBMA, +}; /* *INDENT-ON* */ #endif /* CLIB_MARCH_VARIANT */