vpp - Vector Packet Processing

Age	Commit message (Expand)	Author	Files	Lines
2016-01-28	vpp metrics upload via gmond plugin	Dave Barach	1	-0/+27

/* * gre_interface.c: gre interfaces * * 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. */ #include <vnet/vnet.h> #include <vnet/pg/pg.h> #include <vnet/gre/gre.h> #include <vnet/ip/format.h> #include <vnet/fib/ip4_fib.h> #include <vnet/fib/ip6_fib.h> #include <vnet/adj/adj_midchain.h> #include <vnet/adj/adj_nbr.h> #include <vnet/mpls/mpls.h> #include <vnet/l2/l2_input.h> static const char *gre_tunnel_type_names[] = GRE_TUNNEL_TYPE_NAMES; static u8 * format_gre_tunnel (u8 * s, va_list * args) { gre_tunnel_t *t = va_arg (*args, gre_tunnel_t *); s = format (s, "[%d] instance %d src %U dst %U fib-idx %d sw-if-idx %d ", t->dev_instance, t->user_instance, format_ip46_address, &t->tunnel_src, IP46_TYPE_ANY, format_ip46_address, &t->tunnel_dst.fp_addr, IP46_TYPE_ANY, t->outer_fib_index, t->sw_if_index); s = format (s, "payload %s ", gre_tunnel_type_names[t->type]); if (t->type == GRE_TUNNEL_TYPE_ERSPAN) s = format (s, "session %d ", t->session_id); if (t->type != GRE_TUNNEL_TYPE_L3) s = format (s, "l2-adj-idx %d ", t->l2_adj_index); return s; } static gre_tunnel_t * gre_tunnel_db_find (const vnet_gre_add_del_tunnel_args_t * a, u32 outer_fib_index, gre_tunnel_key_t * key) { gre_main_t *gm = &gre_main; uword *p; if (!a->is_ipv6) { gre_mk_key4 (a->src.ip4, a->dst.ip4, outer_fib_index, a->tunnel_type, a->session_id, &key->gtk_v4); p = hash_get_mem (gm->tunnel_by_key4, &key->gtk_v4); } else { gre_mk_key6 (&a->src.ip6, &a->dst.ip6, outer_fib_index, a->tunnel_type, a->session_id, &key->gtk_v6); p = hash_get_mem (gm->tunnel_by_key6, &key->gtk_v6); } if (NULL == p) return (NULL); return (pool_elt_at_index (gm->tunnels, p[0])); } static void gre_tunnel_db_add (gre_tunnel_t * t, gre_tunnel_key_t * key) { gre_main_t *gm = &gre_main; t->key = clib_mem_alloc (sizeof (*t->key)); clib_memcpy (t->key, key, sizeof (*key)); if (t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6) { hash_set_mem (gm->tunnel_by_key6, &t->key->gtk_v6, t->dev_instance); } else { hash_set_mem (gm->tunnel_by_key4, &t->key->gtk_v4, t->dev_instance); } } static void gre_tunnel_db_remove (gre_tunnel_t * t) { gre_main_t *gm = &gre_main; if (t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6) { hash_unset_mem (gm->tunnel_by_key6, &t->key->gtk_v6); } else { hash_unset_mem (gm->tunnel_by_key4, &t->key->gtk_v4); } clib_mem_free (t->key); t->key = NULL; } static gre_tunnel_t * gre_tunnel_from_fib_node (fib_node_t * node) { ASSERT (FIB_NODE_TYPE_GRE_TUNNEL == node->fn_type); return ((gre_tunnel_t *) (((char *) node) - STRUCT_OFFSET_OF (gre_tunnel_t, node))); } /** * gre_tunnel_stack * * 'stack' (resolve the recursion for) the tunnel's midchain adjacency */ void gre_tunnel_stack (adj_index_t ai) { fib_forward_chain_type_t fib_fwd; gre_main_t *gm = &gre_main; dpo_id_t tmp = DPO_INVALID; ip_adjacency_t *adj; gre_tunnel_t *gt; u32 sw_if_index; adj = adj_get (ai); sw_if_index = adj->rewrite_header.sw_if_index; if ((vec_len (gm->tunnel_index_by_sw_if_index) <= sw_if_index) || (~0 == gm->tunnel_index_by_sw_if_index[sw_if_index])) return; gt = pool_elt_at_index (gm->tunnels, gm->tunnel_index_by_sw_if_index[sw_if_index]); if ((vnet_hw_interface_get_flags (vnet_get_main (), gt->hw_if_index) & VNET_HW_INTERFACE_FLAG_LINK_UP) == 0) { adj_nbr_midchain_unstack (ai); return; } fib_fwd = fib_forw_chain_type_from_fib_proto (gt->tunnel_dst.fp_proto); fib_entry_contribute_forwarding (gt->fib_entry_index, fib_fwd, &tmp); if (DPO_LOAD_BALANCE == tmp.dpoi_type) { /* * post GRE rewrite we will load-balance. However, the GRE encap * is always the same for this adjacency/tunnel and hence the IP/GRE * src,dst hash is always the same result too. So we do that hash now and * stack on the choice. * If the choice is an incomplete adj then we will need a poke when * it becomes complete. This happens since the adj update walk propagates * as far a recursive paths. */ const dpo_id_t *choice; load_balance_t *lb; int hash; lb = load_balance_get (tmp.dpoi_index); if (fib_fwd == FIB_FORW_CHAIN_TYPE_UNICAST_IP4) hash = ip4_compute_flow_hash ((ip4_header_t *) adj_get_rewrite (ai), lb->lb_hash_config); else hash = ip6_compute_flow_hash ((ip6_header_t *) adj_get_rewrite (ai), lb->lb_hash_config); choice = load_balance_get_bucket_i (lb, hash & lb->lb_n_buckets_minus_1); dpo_copy (&tmp, choice); } adj_nbr_midchain_stack (ai, &tmp); dpo_reset (&tmp); } /** * @brief Call back when restacking all adjacencies on a GRE interface */ static adj_walk_rc_t gre_adj_walk_cb (adj_index_t ai, void *ctx) { gre_tunnel_stack (ai); return (ADJ_WALK_RC_CONTINUE); } static void gre_tunnel_restack (gre_tunnel_t * gt) { fib_protocol_t proto; /* * walk all the adjacencies on th GRE interface and restack them */ FOR_EACH_FIB_IP_PROTOCOL (proto) { adj_nbr_walk (gt->sw_if_index, proto, gre_adj_walk_cb, NULL); } } /** * Function definition to backwalk a FIB node */ static fib_node_back_walk_rc_t gre_tunnel_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx) { gre_tunnel_restack (gre_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 * gre_tunnel_fib_node_get (fib_node_index_t index) { gre_tunnel_t *gt; gre_main_t *gm; gm = &gre_main; gt = pool_elt_at_index (gm->tunnels, index); return (&gt->node); } /** * Function definition to inform the FIB node that its last lock has gone. */ static void gre_tunnel_last_lock_gone (fib_node_t * node) { /* * The MPLS GRE 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 MPLS GRE tunnels * for participation in the FIB object graph. */ const static fib_node_vft_t gre_vft = { .fnv_get = gre_tunnel_fib_node_get, .fnv_last_lock = gre_tunnel_last_lock_gone, .fnv_back_walk = gre_tunnel_back_walk, }; static int vnet_gre_tunnel_add (vnet_gre_add_del_tunnel_args_t * a, u32 outer_fib_index, u32 * sw_if_indexp) { gre_main_t *gm = &gre_main; vnet_main_t *vnm = gm->vnet_main; ip4_main_t *im4 = &ip4_main; ip6_main_t *im6 = &ip6_main; gre_tunnel_t *t; vnet_hw_interface_t *hi; u32 hw_if_index, sw_if_index; clib_error_t *error; u8 is_ipv6 = a->is_ipv6; gre_tunnel_key_t key; t = gre_tunnel_db_find (a, outer_fib_index, &key); if (NULL != t) return VNET_API_ERROR_IF_ALREADY_EXISTS; pool_get_aligned (gm->tunnels, t, CLIB_CACHE_LINE_BYTES); clib_memset (t, 0, sizeof (*t)); /* Reconcile the real dev_instance and a possible requested instance */ u32 t_idx = t - gm->tunnels; /* tunnel index (or instance) */ u32 u_idx = a->instance; /* user specified instance */ if (u_idx == ~0) u_idx = t_idx; if (hash_get (gm->instance_used, u_idx)) { pool_put (gm->tunnels, t); return VNET_API_ERROR_INSTANCE_IN_USE; } hash_set (gm->instance_used, u_idx, 1); t->dev_instance = t_idx; /* actual */ t->user_instance = u_idx; /* name */ fib_node_init (&t->node, FIB_NODE_TYPE_GRE_TUNNEL); t->type = a->tunnel_type; if (t->type == GRE_TUNNEL_TYPE_ERSPAN) t->session_id = a->session_id; if (t->type == GRE_TUNNEL_TYPE_L3) hw_if_index = vnet_register_interface (vnm, gre_device_class.index, t_idx, gre_hw_interface_class.index, t_idx); else { /* Default MAC address (d00b:eed0:0000 + sw_if_index) */ u8 address[6] = { 0xd0, 0x0b, 0xee, 0xd0, (u8) (t_idx >> 8), (u8) t_idx }; error = ethernet_register_interface (vnm, gre_device_class.index, t_idx, address, &hw_if_index, 0); if (error) { clib_error_report (error); return VNET_API_ERROR_INVALID_REGISTRATION; } } /* Set GRE tunnel interface output node (not used for L3 payload) */ vnet_set_interface_output_node (vnm, hw_if_index, gre_encap_node.index); hi = vnet_get_hw_interface (vnm, hw_if_index); sw_if_index = hi->sw_if_index; t->hw_if_index = hw_if_index; t->outer_fib_index = outer_fib_index; t->sw_if_index = sw_if_index; t->l2_adj_index = ADJ_INDEX_INVALID; vec_validate_init_empty (gm->tunnel_index_by_sw_if_index, sw_if_index, ~0); gm->tunnel_index_by_sw_if_index[sw_if_index] = t_idx; if (!is_ipv6) { vec_validate (im4->fib_index_by_sw_if_index, sw_if_index); hi->min_packet_bytes = 64 + sizeof (gre_header_t) + sizeof (ip4_header_t); } else { vec_validate (im6->fib_index_by_sw_if_index, sw_if_index); hi->min_packet_bytes = 64 + sizeof (gre_header_t) + sizeof (ip6_header_t); } /* Standard default gre MTU. */ vnet_sw_interface_set_mtu (vnm, sw_if_index, 9000); /* * 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 */ clib_memcpy (&t->tunnel_src, &a->src, sizeof (t->tunnel_src)); t->tunnel_dst.fp_len = !is_ipv6 ? 32 : 128; t->tunnel_dst.fp_proto = !is_ipv6 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6; t->tunnel_dst.fp_addr = a->dst; gre_tunnel_db_add (t, &key); if (t->type == GRE_TUNNEL_TYPE_ERSPAN) { gre_sn_key_t skey; gre_sn_t *gre_sn; gre_mk_sn_key (t, &skey); gre_sn = (gre_sn_t *) hash_get_mem (gm->seq_num_by_key, &skey); if (gre_sn != NULL) { gre_sn->ref_count++; t->gre_sn = gre_sn; } else { gre_sn = clib_mem_alloc (sizeof (gre_sn_t)); gre_sn->seq_num = 0; gre_sn->ref_count = 1; t->gre_sn = gre_sn; hash_set_mem_alloc (&gm->seq_num_by_key, &skey, (uword) gre_sn); } } t->fib_entry_index = fib_table_entry_special_add (outer_fib_index, &t->tunnel_dst, FIB_SOURCE_RR, FIB_ENTRY_FLAG_NONE); t->sibling_index = fib_entry_child_add (t->fib_entry_index, FIB_NODE_TYPE_GRE_TUNNEL, t_idx); if (t->type != GRE_TUNNEL_TYPE_L3) { t->l2_adj_index = adj_nbr_add_or_lock (t->tunnel_dst.fp_proto, VNET_LINK_ETHERNET, &zero_addr, sw_if_index); gre_update_adj (vnm, t->sw_if_index, t->l2_adj_index); } if (sw_if_indexp) *sw_if_indexp = sw_if_index; return 0; } static int vnet_gre_tunnel_delete (vnet_gre_add_del_tunnel_args_t * a, u32 outer_fib_index, u32 * sw_if_indexp) { gre_main_t *gm = &gre_main; vnet_main_t *vnm = gm->vnet_main; gre_tunnel_t *t; gre_tunnel_key_t key; u32 sw_if_index; t = gre_tunnel_db_find (a, outer_fib_index, &key); if (NULL == t) return VNET_API_ERROR_NO_SUCH_ENTRY; sw_if_index = t->sw_if_index; vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ ); /* make sure tunnel is removed from l2 bd or xconnect */ set_int_l2_mode (gm->vlib_main, vnm, MODE_L3, sw_if_index, 0, L2_BD_PORT_TYPE_NORMAL, 0, 0); gm->tunnel_index_by_sw_if_index[sw_if_index] = ~0; if (t->type == GRE_TUNNEL_TYPE_L3) vnet_delete_hw_interface (vnm, t->hw_if_index); else ethernet_delete_interface (vnm, t->hw_if_index); if (t->l2_adj_index != ADJ_INDEX_INVALID) adj_unlock (t->l2_adj_index); fib_entry_child_remove (t->fib_entry_index, t->sibling_index); fib_table_entry_delete_index (t->fib_entry_index, FIB_SOURCE_RR); ASSERT ((t->type != GRE_TUNNEL_TYPE_ERSPAN) || (t->gre_sn != NULL)); if ((t->type == GRE_TUNNEL_TYPE_ERSPAN) && (t->gre_sn->ref_count-- == 1)) { gre_sn_key_t skey; gre_mk_sn_key (t, &skey); hash_unset_mem_free (&gm->seq_num_by_key, &skey); clib_mem_free (t->gre_sn); } hash_unset (gm->instance_used, t->user_instance); gre_tunnel_db_remove (t); fib_node_deinit (&t->node); pool_put (gm->tunnels, t); if (sw_if_indexp) *sw_if_indexp = sw_if_index; return 0; } int vnet_gre_add_del_tunnel (vnet_gre_add_del_tunnel_args_t * a, u32 * sw_if_indexp) { u32 outer_fib_index; if (!a->is_ipv6) outer_fib_index = ip4_fib_index_from_table_id (a->outer_fib_id); else outer_fib_index = ip6_fib_index_from_table_id (a->outer_fib_id); if (~0 == outer_fib_index) return VNET_API_ERROR_NO_SUCH_FIB; if (a->session_id > GTK_SESSION_ID_MAX) return VNET_API_ERROR_INVALID_SESSION_ID; if (a->is_add) return (vnet_gre_tunnel_add (a, outer_fib_index, sw_if_indexp)); else return (vnet_gre_tunnel_delete (a, outer_fib_index, sw_if_indexp)); } clib_error_t * gre_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags) { gre_main_t *gm = &gre_main; vnet_hw_interface_t *hi; gre_tunnel_t *t; u32 ti; hi = vnet_get_hw_interface (vnm, hw_if_index); if (NULL == gm->tunnel_index_by_sw_if_index || hi->sw_if_index >= vec_len (gm->tunnel_index_by_sw_if_index)) return (NULL); ti = gm->tunnel_index_by_sw_if_index[hi->sw_if_index]; if (~0 == ti) /* not one of ours */ return (NULL); t = pool_elt_at_index (gm->tunnels, ti); if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) vnet_hw_interface_set_flags (vnm, hw_if_index, VNET_HW_INTERFACE_FLAG_LINK_UP); else vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */ ); gre_tunnel_restack (t); return /* no error */ 0; } static clib_error_t * create_gre_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; vnet_gre_add_del_tunnel_args_t _a, *a = &_a; ip46_address_t src, dst; u32 instance = ~0; u32 outer_fib_id = 0; gre_tunnel_type_t t_type = GRE_TUNNEL_TYPE_L3; u32 session_id = 0; int rv; u32 num_m_args = 0; u8 is_add = 1; u32 sw_if_index; clib_error_t *error = NULL; u8 ipv4_set = 0; u8 ipv6_set = 0; /* 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, "instance %d", &instance)) ; else if (unformat (line_input, "src %U", unformat_ip4_address, &src.ip4)) { num_m_args++; ipv4_set = 1; } else if (unformat (line_input, "dst %U", unformat_ip4_address, &dst.ip4)) { num_m_args++; ipv4_set = 1; } else if (unformat (line_input, "src %U", unformat_ip6_address, &src.ip6)) { num_m_args++; ipv6_set = 1; } else if (unformat (line_input, "dst %U", unformat_ip6_address, &dst.ip6)) { num_m_args++; ipv6_set = 1; } else if (unformat (line_input, "outer-fib-id %d", &outer_fib_id)) ; else if (unformat (line_input, "teb")) t_type = GRE_TUNNEL_TYPE_TEB; else if (unformat (line_input, "erspan %d", &session_id)) t_type = GRE_TUNNEL_TYPE_ERSPAN; else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done; } } if (num_m_args < 2) { error = clib_error_return (0, "mandatory argument(s) missing"); goto done; } if ((ipv4_set && memcmp (&src.ip4, &dst.ip4, sizeof (src.ip4)) == 0) || (ipv6_set && memcmp (&src.ip6, &dst.ip6, sizeof (src.ip6)) == 0)) { error = clib_error_return (0, "src and dst are identical"); goto done; } if (ipv4_set && ipv6_set) return clib_error_return (0, "both IPv4 and IPv6 addresses specified"); if ((ipv4_set && memcmp (&dst.ip4, &zero_addr.ip4, sizeof (dst.ip4)) == 0) || (ipv6_set && memcmp (&dst.ip6, &zero_addr.ip6, sizeof (dst.ip6)) == 0)) { error = clib_error_return (0, "dst address cannot be zero"); goto done; } clib_memset (a, 0, sizeof (*a)); a->is_add = is_add; a->outer_fib_id = outer_fib_id; a->tunnel_type = t_type; a->session_id = session_id; a->is_ipv6 = ipv6_set; a->instance = instance; if (!ipv6_set) { clib_memcpy (&a->src.ip4, &src.ip4, sizeof (src.ip4)); clib_memcpy (&a->dst.ip4, &dst.ip4, sizeof (dst.ip4)); } else { clib_memcpy (&a->src.ip6, &src.ip6, sizeof (src.ip6)); clib_memcpy (&a->dst.ip6, &dst.ip6, sizeof (dst.ip6)); } rv = vnet_gre_add_del_tunnel (a, &sw_if_index); switch (rv) { case 0: vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (), sw_if_index); break; case VNET_API_ERROR_IF_ALREADY_EXISTS: error = clib_error_return (0, "GRE tunnel already exists..."); goto done; case VNET_API_ERROR_NO_SUCH_FIB: error = clib_error_return (0, "outer fib ID %d doesn't exist\n", outer_fib_id); goto done; case VNET_API_ERROR_NO_SUCH_ENTRY: error = clib_error_return (0, "GRE tunnel doesn't exist"); goto done; case VNET_API_ERROR_INVALID_SESSION_ID: error = clib_error_return (0, "session ID %d out of range\n", session_id); goto done; case VNET_API_ERROR_INSTANCE_IN_USE: error = clib_error_return (0, "Instance is in use"); goto done; default: error = clib_error_return (0, "vnet_gre_add_del_tunnel returned %d", rv); goto done; } done: unformat_free (line_input); return error; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (create_gre_tunnel_command, static) = { .path = "create gre tunnel", .short_help = "create gre tunnel src <addr> dst <addr> [instance <n>] " "[outer-fib-id <fib>] [teb | erspan <session-id>] [del]", .function = create_gre_tunnel_command_fn, }; /* *INDENT-ON* */ static clib_error_t * show_gre_tunnel_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { gre_main_t *gm = &gre_main; gre_tunnel_t *t; u32 ti = ~0; if (pool_elts (gm->tunnels) == 0) vlib_cli_output (vm, "No GRE tunnels configured..."); while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "%d", &ti)) ; else break; } if (~0 == ti) { /* *INDENT-OFF* */ pool_foreach (t, gm->tunnels, ({ vlib_cli_output (vm, "%U", format_gre_tunnel, t); })); /* *INDENT-ON* */ } else { t = pool_elt_at_index (gm->tunnels, ti); vlib_cli_output (vm, "%U", format_gre_tunnel, t); } return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (show_gre_tunnel_command, static) = { .path = "show gre tunnel", .function = show_gre_tunnel_command_fn, }; /* *INDENT-ON* */ /* force inclusion from application's main.c */ clib_error_t * gre_interface_init (vlib_main_t * vm) { fib_node_register_type (FIB_NODE_TYPE_GRE_TUNNEL, &gre_vft); return 0; } VLIB_INIT_FUNCTION (gre_interface_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */