vpp - Vector Packet Processing

Age	Commit message (Expand)	Author	Files	Lines
2017-09-13	Shared memory packet interface (memif) library	Jakub Grajciar	1	-0/+2427

/* * Copyright (c) 2017 SUSE LLC. * 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. */ #include <vnet/geneve/geneve.h> #include <vnet/ip/format.h> #include <vnet/fib/fib_entry.h> #include <vnet/fib/fib_table.h> #include <vnet/mfib/mfib_table.h> #include <vnet/adj/adj_mcast.h> #include <vnet/interface.h> #include <vlib/vlib.h> /** * @file * @brief GENEVE. * * GENEVE provides the features needed to allow L2 bridge domains (BDs) * to span multiple servers. This is done by building an L2 overlay on * top of an L3 network underlay using GENEVE tunnels. * * This makes it possible for servers to be co-located in the same data * center or be separated geographically as long as they are reachable * through the underlay L3 network. */ geneve_main_t geneve_main; static u8 * format_decap_next (u8 * s, va_list * args) { u32 next_index = va_arg (*args, u32); switch (next_index) { case GENEVE_INPUT_NEXT_DROP: return format (s, "drop"); case GENEVE_INPUT_NEXT_L2_INPUT: return format (s, "l2"); default: return format (s, "index %d", next_index); } return s; } u8 * format_geneve_tunnel (u8 * s, va_list * args) { geneve_tunnel_t *t = va_arg (*args, geneve_tunnel_t *); geneve_main_t *ngm = &geneve_main; s = format (s, "[%d] lcl %U rmt %U vni %d fib-idx %d sw-if-idx %d ", t - ngm->tunnels, format_ip46_address, &t->local, IP46_TYPE_ANY, format_ip46_address, &t->remote, IP46_TYPE_ANY, t->vni, t->encap_fib_index, t->sw_if_index); s = format (s, "encap-dpo-idx %d ", t->next_dpo.dpoi_index); s = format (s, "decap-next-%U ", format_decap_next, t->decap_next_index); if (PREDICT_FALSE (ip46_address_is_multicast (&t->remote))) s = format (s, "mcast-sw-if-idx %d ", t->mcast_sw_if_index); return s; } static u8 * format_geneve_name (u8 * s, va_list * args) { u32 dev_instance = va_arg (*args, u32); return format (s, "geneve_tunnel%d", dev_instance); } static clib_error_t * geneve_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags) { u32 hw_flags = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? VNET_HW_INTERFACE_FLAG_LINK_UP : 0; vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags); return /* no error */ 0; } /* *INDENT-OFF* */ VNET_DEVICE_CLASS (geneve_device_class, static) = { .name = "GENEVE", .format_device_name = format_geneve_name, .format_tx_trace = format_geneve_encap_trace, .admin_up_down_function = geneve_interface_admin_up_down, }; /* *INDENT-ON* */ static u8 * format_geneve_header_with_length (u8 * s, va_list * args) { u32 dev_instance = va_arg (*args, u32); s = format (s, "unimplemented dev %u", dev_instance); return s; } /* *INDENT-OFF* */ VNET_HW_INTERFACE_CLASS (geneve_hw_class) = { .name = "GENEVE", .format_header = format_geneve_header_with_length, .build_rewrite = default_build_rewrite, }; /* *INDENT-ON* */ static void geneve_tunnel_restack_dpo (geneve_tunnel_t * t) { dpo_id_t dpo = DPO_INVALID; u32 encap_index = ip46_address_is_ip4 (&t->remote) ? geneve4_encap_node.index : geneve6_encap_node.index; fib_forward_chain_type_t forw_type = ip46_address_is_ip4 (&t->remote) ? FIB_FORW_CHAIN_TYPE_UNICAST_IP4 : FIB_FORW_CHAIN_TYPE_UNICAST_IP6; fib_entry_contribute_forwarding (t->fib_entry_index, forw_type, &dpo); dpo_stack_from_node (encap_index, &t->next_dpo, &dpo); dpo_reset (&dpo); } static geneve_tunnel_t * geneve_tunnel_from_fib_node (fib_node_t * node) { ASSERT (FIB_NODE_TYPE_GENEVE_TUNNEL == node->fn_type); return ((geneve_tunnel_t *) (((char *) node) - STRUCT_OFFSET_OF (geneve_tunnel_t, node))); } /** * Function definition to backwalk a FIB node - * Here we will restack the new dpo of GENEVE DIP to encap node. */ static fib_node_back_walk_rc_t geneve_tunnel_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx) { geneve_tunnel_restack_dpo (geneve_tunnel_from_fib_node (node)); return (FIB_NODE_BACK_WALK_CONTINUE); } /** * Function definition to get a FIB node from its index */ static fib_node_t * geneve_tunnel_fib_node_get (fib_node_index_t index) { geneve_tunnel_t *t; geneve_main_t *vxm = &geneve_main; t = pool_elt_at_index (vxm->tunnels, index); return (&t->node); } /** * Function definition to inform the FIB node that its last lock has gone. */ static void geneve_tunnel_last_lock_gone (fib_node_t * node) { /* * The GENEVE tunnel is a root of the graph. As such * it never has children and thus is never locked. */ ASSERT (0); } /* * Virtual function table registered by GENEVE tunnels * for participation in the FIB object graph. */ const static fib_node_vft_t geneve_vft = { .fnv_get = geneve_tunnel_fib_node_get, .fnv_last_lock = geneve_tunnel_last_lock_gone, .fnv_back_walk = geneve_tunnel_back_walk, }; #define foreach_copy_field \ _(vni) \ _(mcast_sw_if_index) \ _(encap_fib_index) \ _(decap_next_index) \ _(local) \ _(remote) static int geneve_rewrite (geneve_tunnel_t * t, bool is_ip6) { union { ip4_geneve_header_t *h4; ip6_geneve_header_t *h6; u8 *rw; } r = { .rw = 0}; int len = is_ip6 ? sizeof *r.h6 : sizeof *r.h4; #if SUPPORT_OPTIONS_HEADER==1 len += t->options_len; #endif vec_validate_aligned (r.rw, len - 1, CLIB_CACHE_LINE_BYTES); udp_header_t *udp; geneve_header_t *geneve; /* Fixed portion of the (outer) ip header */ if (!is_ip6) { ip4_header_t *ip = &r.h4->ip4; udp = &r.h4->udp, geneve = &r.h4->geneve; ip->ip_version_and_header_length = 0x45; ip->ttl = 254; ip->protocol = IP_PROTOCOL_UDP; ip->src_address = t->local.ip4; ip->dst_address = t->remote.ip4; /* we fix up the ip4 header length and checksum after-the-fact */ ip->checksum = ip4_header_checksum (ip); } else { ip6_header_t *ip = &r.h6->ip6; udp = &r.h6->udp, geneve = &r.h6->geneve; ip->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (6 << 28); ip->hop_limit = 255; ip->protocol = IP_PROTOCOL_UDP; ip->src_address = t->local.ip6; ip->dst_address = t->remote.ip6; } /* UDP header, randomize local port on something, maybe? */ udp->src_port = clib_host_to_net_u16 (5251); udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_geneve); /* GENEVE header */ vnet_set_geneve_version (geneve, GENEVE_VERSION); #if SUPPORT_OPTIONS_HEADER==1 vnet_set_geneve_options_len (geneve, t->options_len); #else vnet_set_geneve_options_len (geneve, 0); #endif vnet_set_geneve_oamframe_bit (geneve, 0); vnet_set_geneve_critical_bit (geneve, 0); vnet_set_geneve_protocol (geneve, GENEVE_ETH_PROTOCOL); vnet_geneve_hdr_1word_hton (geneve); vnet_set_geneve_vni (geneve, t->vni); t->rewrite = r.rw; return (0); } static bool geneve_decap_next_is_valid (geneve_main_t * vxm, u32 is_ip6, u32 decap_next_index) { vlib_main_t *vm = vxm->vlib_main; u32 input_idx = (!is_ip6) ? geneve4_input_node.index : geneve6_input_node.index; vlib_node_runtime_t *r = vlib_node_get_runtime (vm, input_idx); return decap_next_index < r->n_next_nodes; } static uword vtep_addr_ref (ip46_address_t * ip) { uword *vtep = ip46_address_is_ip4 (ip) ? hash_get (geneve_main.vtep4, ip->ip4.as_u32) : hash_get_mem (geneve_main.vtep6, &ip->ip6); if (vtep) return ++(*vtep); ip46_address_is_ip4 (ip) ? hash_set (geneve_main.vtep4, ip->ip4.as_u32, 1) : hash_set_mem_alloc (&geneve_main.vtep6, &ip->ip6, 1); return 1; } static uword vtep_addr_unref (ip46_address_t * ip) { uword *vtep = ip46_address_is_ip4 (ip) ? hash_get (geneve_main.vtep4, ip->ip4.as_u32) : hash_get_mem (geneve_main.vtep6, &ip->ip6); ASSERT (vtep); if (--(*vtep) != 0) return *vtep; ip46_address_is_ip4 (ip) ? hash_unset (geneve_main.vtep4, ip->ip4.as_u32) : hash_unset_mem_free (&geneve_main.vtep6, &ip->ip6); return 0; } typedef CLIB_PACKED (union { struct { fib_node_index_t mfib_entry_index; adj_index_t mcast_adj_index; }; u64 as_u64; }) mcast_shared_t; static inline mcast_shared_t mcast_shared_get (ip46_address_t * ip) { ASSERT (ip46_address_is_multicast (ip)); uword *p = hash_get_mem (geneve_main.mcast_shared, ip); ASSERT (p); return (mcast_shared_t) { .as_u64 = *p}; } static inline void mcast_shared_add (ip46_address_t * remote, fib_node_index_t mfei, adj_index_t ai) { mcast_shared_t new_ep = { .mcast_adj_index = ai, .mfib_entry_index = mfei, }; hash_set_mem_alloc (&geneve_main.mcast_shared, remote, new_ep.as_u64); } static inline void mcast_shared_remove (ip46_address_t * remote) { mcast_shared_t ep = mcast_shared_get (remote); adj_unlock (ep.mcast_adj_index); mfib_table_entry_delete_index (ep.mfib_entry_index, MFIB_SOURCE_GENEVE); hash_unset_mem_free (&geneve_main.mcast_shared, remote); } int vnet_geneve_add_del_tunnel (vnet_geneve_add_del_tunnel_args_t * a, u32 * sw_if_indexp) { geneve_main_t *vxm = &geneve_main; geneve_tunnel_t *t = 0; vnet_main_t *vnm = vxm->vnet_main; uword *p; u32 hw_if_index = ~0; u32 sw_if_index = ~0; int rv; geneve4_tunnel_key_t key4; geneve6_tunnel_key_t key6; u32 is_ip6 = a->is_ip6; if (!is_ip6) { key4.remote = a->remote.ip4.as_u32; key4.vni = clib_host_to_net_u32 ((a->vni << GENEVE_VNI_SHIFT) & GENEVE_VNI_MASK); p = hash_get (vxm->geneve4_tunnel_by_key, key4.as_u64); } else { key6.remote = a->remote.ip6; key6.vni = clib_host_to_net_u32 ((a->vni << GENEVE_VNI_SHIFT) & GENEVE_VNI_MASK); p = hash_get_mem (vxm->geneve6_tunnel_by_key, &key6); } if (a->is_add) { l2input_main_t *l2im = &l2input_main; /* adding a tunnel: tunnel must not already exist */ if (p) return VNET_API_ERROR_TUNNEL_EXIST; /*if not set explicitly, default to l2 */ if (a->decap_next_index == ~0) a->decap_next_index = GENEVE_INPUT_NEXT_L2_INPUT; if (!geneve_decap_next_is_valid (vxm, is_ip6, a->decap_next_index)) return VNET_API_ERROR_INVALID_DECAP_NEXT; pool_get_aligned (vxm->tunnels, t, CLIB_CACHE_LINE_BYTES); memset (t, 0, sizeof (*t)); /* copy from arg structure */ #define _(x) t->x = a->x; foreach_copy_field; #undef _ rv = geneve_rewrite (t, is_ip6); if (rv) { pool_put (vxm->tunnels, t); return rv; } /* copy the key */ if (is_ip6) hash_set_mem_alloc (&vxm->geneve6_tunnel_by_key, &key6, t - vxm->tunnels); else hash_set (vxm->geneve4_tunnel_by_key, key4.as_u64, t - vxm->tunnels); vnet_hw_interface_t *hi; if (vec_len (vxm->free_geneve_tunnel_hw_if_indices) > 0) { vnet_interface_main_t *im = &vnm->interface_main; hw_if_index = vxm->free_geneve_tunnel_hw_if_indices [vec_len (vxm->free_geneve_tunnel_hw_if_indices) - 1]; _vec_len (vxm->free_geneve_tunnel_hw_if_indices) -= 1; hi = vnet_get_hw_interface (vnm, hw_if_index); hi->dev_instance = t - vxm->tunnels; hi->hw_instance = hi->dev_instance; /* clear old stats of freed tunnel before reuse */ sw_if_index = hi->sw_if_index; vnet_interface_counter_lock (im); vlib_zero_combined_counter (&im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX], sw_if_index); vlib_zero_combined_counter (&im->combined_sw_if_counters [VNET_INTERFACE_COUNTER_RX], sw_if_index); vlib_zero_simple_counter (&im->sw_if_counters [VNET_INTERFACE_COUNTER_DROP], sw_if_index); vnet_interface_counter_unlock (im); } else { hw_if_index = vnet_register_interface (vnm, geneve_device_class.index, t - vxm->tunnels, geneve_hw_class.index, t - vxm->tunnels); hi = vnet_get_hw_interface (vnm, hw_if_index); } /* Set geneve tunnel output node */ u32 encap_index = !is_ip6 ? geneve4_encap_node.index : geneve6_encap_node.index; vnet_set_interface_output_node (vnm, hw_if_index, encap_index); t->hw_if_index = hw_if_index; t->sw_if_index = sw_if_index = hi->sw_if_index; vec_validate_init_empty (vxm->tunnel_index_by_sw_if_index, sw_if_index, ~0); vxm->tunnel_index_by_sw_if_index[sw_if_index] = t - vxm->tunnels; /* setup l2 input config with l2 feature and bd 0 to drop packet */ vec_validate (l2im->configs, sw_if_index); l2im->configs[sw_if_index].feature_bitmap = L2INPUT_FEAT_DROP; l2im->configs[sw_if_index].bd_index = 0; vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index); si->flags &= ~VNET_SW_INTERFACE_FLAG_HIDDEN; vnet_sw_interface_set_flags (vnm, sw_if_index, VNET_SW_INTERFACE_FLAG_ADMIN_UP); fib_node_init (&t->node, FIB_NODE_TYPE_GENEVE_TUNNEL); fib_prefix_t tun_remote_pfx; vnet_flood_class_t flood_class = VNET_FLOOD_CLASS_TUNNEL_NORMAL; fib_prefix_from_ip46_addr (&t->remote, &tun_remote_pfx); if (!ip46_address_is_multicast (&t->remote)) { /* Unicast tunnel - * source the FIB entry for the tunnel's destination * and become a child thereof. The tunnel will then get poked * when the forwarding for the entry updates, and the tunnel can * re-stack accordingly */ vtep_addr_ref (&t->local); t->fib_entry_index = fib_table_entry_special_add (t->encap_fib_index, &tun_remote_pfx, FIB_SOURCE_RR, FIB_ENTRY_FLAG_NONE); t->sibling_index = fib_entry_child_add (t->fib_entry_index, FIB_NODE_TYPE_GENEVE_TUNNEL, t - vxm->tunnels); geneve_tunnel_restack_dpo (t); } else { /* Multicast tunnel - * as the same mcast group can be used for mutiple mcast tunnels * with different VNIs, create the output fib adjecency only if * it does not already exist */ fib_protocol_t fp = fib_ip_proto (is_ip6); if (vtep_addr_ref (&t->remote) == 1) { fib_node_index_t mfei; adj_index_t ai; fib_route_path_t path = { .frp_proto = fib_proto_to_dpo (fp), .frp_addr = zero_addr, .frp_sw_if_index = 0xffffffff, .frp_fib_index = ~0, .frp_weight = 0, .frp_flags = FIB_ROUTE_PATH_LOCAL, }; const mfib_prefix_t mpfx = { .fp_proto = fp, .fp_len = (is_ip6 ? 128 : 32), .fp_grp_addr = tun_remote_pfx.fp_addr, }; /* * Setup the (*,G) to receive traffic on the mcast group * - the forwarding interface is for-us * - the accepting interface is that from the API */ mfib_table_entry_path_update (t->encap_fib_index, &mpfx, MFIB_SOURCE_GENEVE, &path, MFIB_ITF_FLAG_FORWARD); path.frp_sw_if_index = a->mcast_sw_if_index; path.frp_flags = FIB_ROUTE_PATH_FLAG_NONE; mfei = mfib_table_entry_path_update (t->encap_fib_index, &mpfx, MFIB_SOURCE_GENEVE, &path, MFIB_ITF_FLAG_ACCEPT); /* * Create the mcast adjacency to send traffic to the group */ ai = adj_mcast_add_or_lock (fp, fib_proto_to_link (fp), a->mcast_sw_if_index); /* * create a new end-point */ mcast_shared_add (&t->remote, mfei, ai); } dpo_id_t dpo = DPO_INVALID; mcast_shared_t ep = mcast_shared_get (&t->remote); /* Stack shared mcast remote mac addr rewrite on encap */ dpo_set (&dpo, DPO_ADJACENCY_MCAST, fib_proto_to_dpo (fp), ep.mcast_adj_index); dpo_stack_from_node (encap_index, &t->next_dpo, &dpo); dpo_reset (&dpo); flood_class = VNET_FLOOD_CLASS_TUNNEL_MASTER; } vnet_get_sw_interface (vnet_get_main (), sw_if_index)->flood_class = flood_class; } else { /* deleting a tunnel: tunnel must exist */ if (!p) return VNET_API_ERROR_NO_SUCH_ENTRY; t = pool_elt_at_index (vxm->tunnels, p[0]); sw_if_index = t->sw_if_index; vnet_sw_interface_set_flags (vnm, t->sw_if_index, 0 /* down */ ); vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, t->sw_if_index); si->flags |= VNET_SW_INTERFACE_FLAG_HIDDEN; /* make sure tunnel is removed from l2 bd or xconnect */ set_int_l2_mode (vxm->vlib_main, vnm, MODE_L3, t->sw_if_index, 0, L2_BD_PORT_TYPE_NORMAL, 0, 0); vec_add1 (vxm->free_geneve_tunnel_hw_if_indices, t->hw_if_index); vxm->tunnel_index_by_sw_if_index[t->sw_if_index] = ~0; if (!is_ip6) hash_unset (vxm->geneve4_tunnel_by_key, key4.as_u64); else hash_unset_mem_free (&vxm->geneve6_tunnel_by_key, &key6); if (!ip46_address_is_multicast (&t->remote)) { vtep_addr_unref (&t->local); fib_entry_child_remove (t->fib_entry_index, t->sibling_index); fib_table_entry_delete_index (t->fib_entry_index, FIB_SOURCE_RR); } else if (vtep_addr_unref (&t->remote) == 0) { mcast_shared_remove (&t->remote); } fib_node_deinit (&t->node); vec_free (t->rewrite); pool_put (vxm->tunnels, t); } if (sw_if_indexp) *sw_if_indexp = sw_if_index; return 0; } static uword get_decap_next_for_node (u32 node_index, u32 ipv4_set) { geneve_main_t *vxm = &geneve_main; vlib_main_t *vm = vxm->vlib_main; uword input_node = (ipv4_set) ? geneve4_input_node.index : geneve6_input_node.index; return vlib_node_add_next (vm, input_node, node_index); } static uword unformat_decap_next (unformat_input_t * input, va_list * args) { u32 *result = va_arg (*args, u32 *); u32 ipv4_set = va_arg (*args, int); geneve_main_t *vxm = &geneve_main; vlib_main_t *vm = vxm->vlib_main; u32 node_index; u32 tmp; if (unformat (input, "l2")) *result = GENEVE_INPUT_NEXT_L2_INPUT; else if (unformat (input, "node %U", unformat_vlib_node, vm, &node_index)) *result = get_decap_next_for_node (node_index, ipv4_set); else if (unformat (input, "%d", &tmp)) *result = tmp; else return 0; return 1; } static clib_error_t * geneve_add_del_tunnel_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; ip46_address_t local, remote; u8 is_add = 1; u8 local_set = 0; u8 remote_set = 0; u8 grp_set = 0; u8 ipv4_set = 0; u8 ipv6_set = 0; u32 encap_fib_index = 0; u32 mcast_sw_if_index = ~0; u32 decap_next_index = GENEVE_INPUT_NEXT_L2_INPUT; u32 vni = 0; u32 tmp; int rv; vnet_geneve_add_del_tunnel_args_t _a, *a = &_a; u32 tunnel_sw_if_index; clib_error_t *error = NULL; /* Cant "universally zero init" (={0}) due to GCC bug 53119 */ memset (&local, 0, sizeof local); memset (&remote, 0, sizeof remote); /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "del")) { is_add = 0; } else if (unformat (line_input, "local %U", unformat_ip4_address, &local.ip4)) { local_set = 1; ipv4_set = 1; } else if (unformat (line_input, "remote %U", unformat_ip4_address, &remote.ip4)) { remote_set = 1; ipv4_set = 1; } else if (unformat (line_input, "local %U", unformat_ip6_address, &local.ip6)) { local_set = 1; ipv6_set = 1; } else if (unformat (line_input, "remote %U", unformat_ip6_address, &remote.ip6)) { remote_set = 1; ipv6_set = 1; } else if (unformat (line_input, "group %U %U", unformat_ip4_address, &remote.ip4, unformat_vnet_sw_interface, vnet_get_main (), &mcast_sw_if_index)) { grp_set = remote_set = 1; ipv4_set = 1; } else if (unformat (line_input, "group %U %U", unformat_ip6_address, &remote.ip6, unformat_vnet_sw_interface, vnet_get_main (), &mcast_sw_if_index)) { grp_set = remote_set = 1; ipv6_set = 1; } else if (unformat (line_input, "encap-vrf-id %d", &tmp)) { encap_fib_index = fib_table_find (fib_ip_proto (ipv6_set), tmp); if (encap_fib_index == ~0) { error = clib_error_return (0, "nonexistent encap-vrf-id %d", tmp); goto done; } } else if (unformat (line_input, "decap-next %U", unformat_decap_next, &decap_next_index, ipv4_set)) ; else if (unformat (line_input, "vni %d", &vni)) { if (vni >> 24) { error = clib_error_return (0, "vni %d out of range", vni); goto done; } } else { error = clib_error_return (0, "parse error: '%U'", format_unformat_error, line_input); goto done; } } if (local_set == 0) { error = clib_error_return (0, "tunnel local address not specified"); goto done; } if (remote_set == 0) { error = clib_error_return (0, "tunnel remote address not specified"); goto done; } if (grp_set && !ip46_address_is_multicast (&remote)) { error = clib_error_return (0, "tunnel group address not multicast"); goto done; } if (grp_set == 0 && ip46_address_is_multicast (&remote)) { error = clib_error_return (0, "remote address must be unicast"); goto done; } if (grp_set && mcast_sw_if_index == ~0) { error = clib_error_return (0, "tunnel nonexistent multicast device"); goto done; } if (ipv4_set && ipv6_set) { error = clib_error_return (0, "both IPv4 and IPv6 addresses specified"); goto done; } if (ip46_address_cmp (&local, &remote) == 0) { error = clib_error_return (0, "local and remote addresses are identical"); goto done; } if (decap_next_index == ~0) { error = clib_error_return (0, "next node not found"); goto done; } if (vni == 0) { error = clib_error_return (0, "vni not specified"); goto done; } memset (a, 0, sizeof (*a)); a->is_add = is_add; a->is_ip6 = ipv6_set; #define _(x) a->x = x; foreach_copy_field; #undef _ rv = vnet_geneve_add_del_tunnel (a, &tunnel_sw_if_index); switch (rv) { case 0: if (is_add) vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (), tunnel_sw_if_index); break; case VNET_API_ERROR_TUNNEL_EXIST: error = clib_error_return (0, "tunnel already exists..."); goto done; case VNET_API_ERROR_NO_SUCH_ENTRY: error = clib_error_return (0, "tunnel does not exist..."); goto done; default: error = clib_error_return (0, "vnet_geneve_add_del_tunnel returned %d", rv); goto done; } done: unformat_free (line_input); return error; } /*? * Add or delete a GENEVE Tunnel. * * GENEVE provides the features needed to allow L2 bridge domains (BDs) * to span multiple servers. This is done by building an L2 overlay on * top of an L3 network underlay using GENEVE tunnels. * * This makes it possible for servers to be co-located in the same data * center or be separated geographically as long as they are reachable * through the underlay L3 network. * * You can refer to this kind of L2 overlay bridge domain as a GENEVE * segment. * * @cliexpar * Example of how to create a GENEVE Tunnel: * @cliexcmd{create geneve tunnel local 10.0.3.1 remote 10.0.3.3 vni 13 encap-vrf-id 7} * Example of how to delete a GENEVE Tunnel: * @cliexcmd{create geneve tunnel local 10.0.3.1 remote 10.0.3.3 vni 13 del} ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (create_geneve_tunnel_command, static) = { .path = "create geneve tunnel", .short_help = "create geneve tunnel local <local-vtep-addr>" " {remote <remote-vtep-addr>|group <mcast-vtep-addr> <intf-name>} vni <nn>" " [encap-vrf-id <nn>] [decap-next [l2|node <name>]] [del]", .function = geneve_add_del_tunnel_command_fn, }; /* *INDENT-ON* */ static clib_error_t * show_geneve_tunnel_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { geneve_main_t *vxm = &geneve_main; geneve_tunnel_t *t; if (pool_elts (vxm->tunnels) == 0) vlib_cli_output (vm, "No geneve tunnels configured..."); pool_foreach (t, vxm->tunnels, ( { vlib_cli_output (vm, "%U", format_geneve_tunnel, t); } )); return 0; } /*? * Display all the GENEVE Tunnel entries. * * @cliexpar * Example of how to display the GENEVE Tunnel entries: * @cliexstart{show geneve tunnel} * [0] local 10.0.3.1 remote 10.0.3.3 vni 13 encap_fib_index 0 sw_if_index 5 decap_next l2 * @cliexend ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (show_geneve_tunnel_command, static) = { .path = "show geneve tunnel", .short_help = "show geneve tunnel", .function = show_geneve_tunnel_command_fn, }; /* *INDENT-ON* */ void vnet_int_geneve_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable) { if (is_ip6) vnet_feature_enable_disable ("ip6-unicast", "ip6-geneve-bypass", sw_if_index, is_enable, 0, 0); else vnet_feature_enable_disable ("ip4-unicast", "ip4-geneve-bypass", sw_if_index, is_enable, 0, 0); } static clib_error_t * set_ip_geneve_bypass (u32 is_ip6, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; vnet_main_t *vnm = vnet_get_main (); clib_error_t *error = 0; u32 sw_if_index, is_enable; sw_if_index = ~0; is_enable = 1; if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat_user (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index)) ; else if (unformat (line_input, "del")) is_enable = 0; else { error = unformat_parse_error (line_input); goto done; } } if (~0 == sw_if_index) { error = clib_error_return (0, "unknown interface `%U'", format_unformat_error, line_input); goto done; } vnet_int_geneve_bypass_mode (sw_if_index, is_ip6, is_enable); done: unformat_free (line_input); return error; } static clib_error_t * set_ip4_geneve_bypass (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { return set_ip_geneve_bypass (0, input, cmd); } /*? * This command adds the 'ip4-geneve-bypass' graph node for a given interface. * By adding the IPv4 geneve-bypass graph node to an interface, the node checks * for and validate input geneve packet and bypass ip4-lookup, ip4-local, * ip4-udp-lookup nodes to speedup geneve packet forwarding. This node will * cause extra overhead to for non-geneve packets which is kept at a minimum. * * @cliexpar * @parblock * Example of graph node before ip4-geneve-bypass is enabled: * @cliexstart{show vlib graph ip4-geneve-bypass} * Name Next Previous * ip4-geneve-bypass error-drop [0] * geneve4-input [1] * ip4-lookup [2] * @cliexend * * Example of how to enable ip4-geneve-bypass on an interface: * @cliexcmd{set interface ip geneve-bypass GigabitEthernet2/0/0} * * Example of graph node after ip4-geneve-bypass is enabled: * @cliexstart{show vlib graph ip4-geneve-bypass} * Name Next Previous * ip4-geneve-bypass error-drop [0] ip4-input * geneve4-input [1] ip4-input-no-checksum * ip4-lookup [2] * @cliexend * * Example of how to display the feature enabed on an interface: * @cliexstart{show ip interface features GigabitEthernet2/0/0} * IP feature paths configured on GigabitEthernet2/0/0... * ... * ipv4 unicast: * ip4-geneve-bypass * ip4-lookup * ... * @cliexend * * Example of how to disable ip4-geneve-bypass on an interface: * @cliexcmd{set interface ip geneve-bypass GigabitEthernet2/0/0 del} * @endparblock ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (set_interface_ip_geneve_bypass_command, static) = { .path = "set interface ip geneve-bypass", .function = set_ip4_geneve_bypass, .short_help = "set interface ip geneve-bypass <interface> [del]", }; /* *INDENT-ON* */ static clib_error_t * set_ip6_geneve_bypass (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { return set_ip_geneve_bypass (1, input, cmd); } /*? * This command adds the 'ip6-geneve-bypass' graph node for a given interface. * By adding the IPv6 geneve-bypass graph node to an interface, the node checks * for and validate input geneve packet and bypass ip6-lookup, ip6-local, * ip6-udp-lookup nodes to speedup geneve packet forwarding. This node will * cause extra overhead to for non-geneve packets which is kept at a minimum. * * @cliexpar * @parblock * Example of graph node before ip6-geneve-bypass is enabled: * @cliexstart{show vlib graph ip6-geneve-bypass} * Name Next Previous * ip6-geneve-bypass error-drop [0] * geneve6-input [1] * ip6-lookup [2] * @cliexend * * Example of how to enable ip6-geneve-bypass on an interface: * @cliexcmd{set interface ip6 geneve-bypass GigabitEthernet2/0/0} * * Example of graph node after ip6-geneve-bypass is enabled: * @cliexstart{show vlib graph ip6-geneve-bypass} * Name Next Previous * ip6-geneve-bypass error-drop [0] ip6-input * geneve6-input [1] ip4-input-no-checksum * ip6-lookup [2] * @cliexend * * Example of how to display the feature enabed on an interface: * @cliexstart{show ip interface features GigabitEthernet2/0/0} * IP feature paths configured on GigabitEthernet2/0/0... * ... * ipv6 unicast: * ip6-geneve-bypass * ip6-lookup * ... * @cliexend * * Example of how to disable ip6-geneve-bypass on an interface: * @cliexcmd{set interface ip6 geneve-bypass GigabitEthernet2/0/0 del} * @endparblock ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (set_interface_ip6_geneve_bypass_command, static) = { .path = "set interface ip6 geneve-bypass", .function = set_ip6_geneve_bypass, .short_help = "set interface ip geneve-bypass <interface> [del]", }; /* *INDENT-ON* */ clib_error_t * geneve_init (vlib_main_t * vm) { geneve_main_t *vxm = &geneve_main; vxm->vnet_main = vnet_get_main (); vxm->vlib_main = vm; /* initialize the ip6 hash */ vxm->geneve6_tunnel_by_key = hash_create_mem (0, sizeof (geneve6_tunnel_key_t), sizeof (uword)); vxm->vtep6 = hash_create_mem (0, sizeof (ip6_address_t), sizeof (uword)); vxm->mcast_shared = hash_create_mem (0, sizeof (ip46_address_t), sizeof (mcast_shared_t)); udp_register_dst_port (vm, UDP_DST_PORT_geneve, geneve4_input_node.index, /* is_ip4 */ 1); udp_register_dst_port (vm, UDP_DST_PORT_geneve6, geneve6_input_node.index, /* is_ip4 */ 0); fib_node_register_type (FIB_NODE_TYPE_GENEVE_TUNNEL, &geneve_vft); return 0; } VLIB_INIT_FUNCTION (geneve_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */