vmxnet3: auto bind support - vpp - Vector Packet Processing

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author	Steven Luong <sluong@cisco.com>	2019-03-14 09:57:09 -0700
committer	Damjan Marion <dmarion@me.com>	2019-03-18 11:11:50 +0000
commit	ee8ba6877efb916b88255821f94ef33437724f75 (patch)
tree	aeb507c38ba53a60791c7084f6f47d540608971f /src/plugins/vmxnet3/vmxnet3.h
parent	a990a2e4930014f025338d8ce186abfa12ec09ff (diff)

vmxnet3: auto bind support

For creating the vmxnet3 interface, add the bind option to automatically bind the pci to vfio-pci module which removes the need for manual bind. Manual bind still works, should people prefer to go that route. Change-Id: Ife75926f8755d754a08dd0ecff0f1de326ad5ba1 Signed-off-by: Steven Luong <sluong@cisco.com>

Diffstat (limited to 'src/plugins/vmxnet3/vmxnet3.h')

-rw-r--r--

src/plugins/vmxnet3/vmxnet3.h

1 files changed, 1 insertions, 0 deletions

/* * Copyright (c) 2015 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/vxlan/vxlan.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/adj/rewrite.h> #include <vnet/interface.h> #include <vnet/flow/flow.h> #include <vlib/vlib.h> /** * @file * @brief VXLAN. * * VXLAN 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 VXLAN 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 VXLAN * (Virtual eXtensible VLAN) segment. */ vxlan_main_t vxlan_main; static u8 * format_decap_next (u8 * s, va_list * args) { u32 next_index = va_arg (*args, u32); if (next_index == VXLAN_INPUT_NEXT_DROP) return format (s, "drop"); else return format (s, "index %d", next_index); return s; } u8 * format_vxlan_tunnel (u8 * s, va_list * args) { vxlan_tunnel_t *t = va_arg (*args, vxlan_tunnel_t *); s = format (s, "[%d] instance %d src %U dst %U vni %d fib-idx %d sw-if-idx %d ", t->dev_instance, t->user_instance, format_ip46_address, &t->src, IP46_TYPE_ANY, format_ip46_address, &t->dst, 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); if (PREDICT_FALSE (t->decap_next_index != VXLAN_INPUT_NEXT_L2_INPUT)) s = format (s, "decap-next-%U ", format_decap_next, t->decap_next_index); if (PREDICT_FALSE (ip46_address_is_multicast (&t->dst))) s = format (s, "mcast-sw-if-idx %d ", t->mcast_sw_if_index); if (t->flow_index != ~0) s = format (s, "flow-index %d [%U]", t->flow_index, format_flow_enabled_hw, t->flow_index); return s; } static u8 * format_vxlan_name (u8 * s, va_list * args) { u32 dev_instance = va_arg (*args, u32); vxlan_main_t *vxm = &vxlan_main; vxlan_tunnel_t *t; if (dev_instance == ~0) return format (s, "<cached-unused>"); if (dev_instance >= vec_len (vxm->tunnels)) return format (s, "<improperly-referenced>"); t = pool_elt_at_index (vxm->tunnels, dev_instance); return format (s, "vxlan_tunnel%d", t->user_instance); } static clib_error_t * vxlan_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 (vxlan_device_class, static) = { .name = "VXLAN", .format_device_name = format_vxlan_name, .format_tx_trace = format_vxlan_encap_trace, .admin_up_down_function = vxlan_interface_admin_up_down, }; /* *INDENT-ON* */ static u8 * format_vxlan_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 (vxlan_hw_class) = { .name = "VXLAN", .format_header = format_vxlan_header_with_length, .build_rewrite = default_build_rewrite, }; /* *INDENT-ON* */ static void vxlan_tunnel_restack_dpo (vxlan_tunnel_t * t) { u8 is_ip4 = ip46_address_is_ip4 (&t->dst); dpo_id_t dpo = DPO_INVALID; fib_forward_chain_type_t forw_type = is_ip4 ? FIB_FORW_CHAIN_TYPE_UNICAST_IP4 : FIB_FORW_CHAIN_TYPE_UNICAST_IP6; fib_entry_contribute_forwarding (t->fib_entry_index, forw_type, &dpo); /* vxlan uses the payload hash as the udp source port * hence the packet's hash is unknown * skip single bucket load balance dpo's */ while (DPO_LOAD_BALANCE == dpo.dpoi_type) { load_balance_t *lb = load_balance_get (dpo.dpoi_index); if (lb->lb_n_buckets > 1) break; dpo_copy (&dpo, load_balance_get_bucket_i (lb, 0)); } u32 encap_index = is_ip4 ? vxlan4_encap_node.index : vxlan6_encap_node.index; dpo_stack_from_node (encap_index, &t->next_dpo, &dpo); dpo_reset (&dpo); } static vxlan_tunnel_t * vxlan_tunnel_from_fib_node (fib_node_t * node) { ASSERT (FIB_NODE_TYPE_VXLAN_TUNNEL == node->fn_type); return ((vxlan_tunnel_t *) (((char *) node) - STRUCT_OFFSET_OF (vxlan_tunnel_t, node))); } /** * Function definition to backwalk a FIB node - * Here we will restack the new dpo of VXLAN DIP to encap node. */ static fib_node_back_walk_rc_t vxlan_tunnel_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx) { vxlan_tunnel_restack_dpo (vxlan_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 * vxlan_tunnel_fib_node_get (fib_node_index_t index) { vxlan_tunnel_t *t; vxlan_main_t *vxm = &vxlan_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 vxlan_tunnel_last_lock_gone (fib_node_t * node) { /* * The VXLAN 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 VXLAN tunnels * for participation in the FIB object graph. */ const static fib_node_vft_t vxlan_vft = { .fnv_get = vxlan_tunnel_fib_node_get, .fnv_last_lock = vxlan_tunnel_last_lock_gone, .fnv_back_walk = vxlan_tunnel_back_walk, }; #define foreach_copy_field \ _(vni) \ _(mcast_sw_if_index) \ _(encap_fib_index) \ _(decap_next_index) \ _(src) \ _(dst) static void vxlan_rewrite (vxlan_tunnel_t * t, bool is_ip6) { union { ip4_vxlan_header_t h4; ip6_vxlan_header_t h6; } h; int len = is_ip6 ? sizeof h.h6 : sizeof h.h4; udp_header_t *udp; vxlan_header_t *vxlan; /* Fixed portion of the (outer) ip header */ clib_memset (&h, 0, sizeof (h)); if (!is_ip6) { ip4_header_t *ip = &h.h4.ip4; udp = &h.h4.udp, vxlan = &h.h4.vxlan; ip->ip_version_and_header_length = 0x45; ip->ttl = 254; ip->protocol = IP_PROTOCOL_UDP; ip->src_address = t->src.ip4; ip->dst_address = t->dst.ip4; /* we fix up the ip4 header length and checksum after-the-fact */ ip->checksum = ip4_header_checksum (ip); } else { ip6_header_t *ip = &h.h6.ip6; udp = &h.h6.udp, vxlan = &h.h6.vxlan; 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->src.ip6; ip->dst_address = t->dst.ip6; } /* UDP header, randomize src port on something, maybe? */ udp->src_port = clib_host_to_net_u16 (4789); udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_vxlan); /* VXLAN header */ vnet_set_vni_and_flags (vxlan, t->vni); vnet_rewrite_set_data (*t, &h, len); } static bool vxlan_decap_next_is_valid (vxlan_main_t * vxm, u32 is_ip6, u32 decap_next_index) { vlib_main_t *vm = vxm->vlib_main; u32 input_idx = (!is_ip6) ? vxlan4_input_node.index : vxlan6_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 (vxlan_main.vtep4, ip->ip4.as_u32) : hash_get_mem (vxlan_main.vtep6, &ip->ip6); if (vtep) return ++(*vtep); ip46_address_is_ip4 (ip) ? hash_set (vxlan_main.vtep4, ip->ip4.as_u32, 1) : hash_set_mem_alloc (&vxlan_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 (vxlan_main.vtep4, ip->ip4.as_u32) : hash_get_mem (vxlan_main.vtep6, &ip->ip6); ASSERT (vtep); if (--(*vtep) != 0) return *vtep; ip46_address_is_ip4 (ip) ? hash_unset (vxlan_main.vtep4, ip->ip4.as_u32) : hash_unset_mem_free (&vxlan_main.vtep6, &ip->ip6); return 0; } /* *INDENT-OFF* */ typedef CLIB_PACKED(union { struct { fib_node_index_t mfib_entry_index; adj_index_t mcast_adj_index; }; u64 as_u64; }) mcast_shared_t; /* *INDENT-ON* */ static inline mcast_shared_t mcast_shared_get (ip46_address_t * ip) { ASSERT (ip46_address_is_multicast (ip)); uword *p = hash_get_mem (vxlan_main.mcast_shared, ip); ASSERT (p); mcast_shared_t ret = {.as_u64 = *p }; return ret; } static inline void mcast_shared_add (ip46_address_t * dst, 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 (&vxlan_main.mcast_shared, dst, new_ep.as_u64); } static inline void mcast_shared_remove (ip46_address_t * dst) { mcast_shared_t ep = mcast_shared_get (dst); adj_unlock (ep.mcast_adj_index); mfib_table_entry_delete_index (ep.mfib_entry_index, MFIB_SOURCE_VXLAN); hash_unset_mem_free (&vxlan_main.mcast_shared, dst); } int vnet_vxlan_add_del_tunnel (vnet_vxlan_add_del_tunnel_args_t * a, u32 * sw_if_indexp) { vxlan_main_t *vxm = &vxlan_main; vnet_main_t *vnm = vxm->vnet_main; vxlan_decap_info_t *p; u32 sw_if_index = ~0; vxlan4_tunnel_key_t key4; vxlan6_tunnel_key_t key6; u32 is_ip6 = a->is_ip6; int not_found; if (!is_ip6) { /* ip4 mcast is indexed by mcast addr only */ key4.key[0] = ip46_address_is_multicast (&a->dst) ? a->dst.ip4.as_u32 : a->dst.ip4.as_u32 | (((u64) a->src.ip4.as_u32) << 32); key4.key[1] = (((u64) a->encap_fib_index) << 32) | clib_host_to_net_u32 (a->vni << 8); not_found = clib_bihash_search_inline_16_8 (&vxm->vxlan4_tunnel_by_key, &key4); p = (void *) &key4.value; } else { key6.key[0] = a->dst.ip6.as_u64[0]; key6.key[1] = a->dst.ip6.as_u64[1]; key6.key[2] = (((u64) a->encap_fib_index) << 32) | clib_host_to_net_u32 (a->vni << 8); not_found = clib_bihash_search_inline_24_8 (&vxm->vxlan6_tunnel_by_key, &key6); p = (void *) &key6.value; } if (not_found) p = 0; if (a->is_add) { l2input_main_t *l2im = &l2input_main; u32 dev_instance; /* real dev instance tunnel index */ u32 user_instance; /* request and actual instance number */ /* 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 = VXLAN_INPUT_NEXT_L2_INPUT; if (!vxlan_decap_next_is_valid (vxm, is_ip6, a->decap_next_index)) return VNET_API_ERROR_INVALID_DECAP_NEXT; vxlan_tunnel_t *t; pool_get_aligned (vxm->tunnels, t, CLIB_CACHE_LINE_BYTES); clib_memset (t, 0, sizeof (*t)); dev_instance = t - vxm->tunnels; /* copy from arg structure */ #define _(x) t->x = a->x; foreach_copy_field; #undef _ vxlan_rewrite (t, is_ip6); /* * Reconcile the real dev_instance and a possible requested instance. */ user_instance = a->instance; if (user_instance == ~0) user_instance = dev_instance; if (hash_get (vxm->instance_used, user_instance)) { pool_put (vxm->tunnels, t); return VNET_API_ERROR_INSTANCE_IN_USE; } hash_set (vxm->instance_used, user_instance, 1); t->dev_instance = dev_instance; /* actual */ t->user_instance = user_instance; /* name */ t->flow_index = ~0; t->hw_if_index = vnet_register_interface (vnm, vxlan_device_class.index, dev_instance, vxlan_hw_class.index, dev_instance); vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, t->hw_if_index); /* Set vxlan tunnel output node */ u32 encap_index = !is_ip6 ? vxlan4_encap_node.index : vxlan6_encap_node.index; vnet_set_interface_output_node (vnm, t->hw_if_index, encap_index); t->sw_if_index = sw_if_index = hi->sw_if_index; /* copy the key */ int add_failed; if (is_ip6) { key6.value = (u64) dev_instance; add_failed = clib_bihash_add_del_24_8 (&vxm->vxlan6_tunnel_by_key, &key6, 1 /*add */ ); } else { vxlan_decap_info_t di = {.sw_if_index = t->sw_if_index, }; if (ip46_address_is_multicast (&t->dst)) di.local_ip = t->src.ip4; else di.next_index = t->decap_next_index; key4.value = di.as_u64; add_failed = clib_bihash_add_del_16_8 (&vxm->vxlan4_tunnel_by_key, &key4, 1 /*add */ ); } if (add_failed) { vnet_delete_hw_interface (vnm, t->hw_if_index); hash_unset (vxm->instance_used, t->user_instance); pool_put (vxm->tunnels, t); return VNET_API_ERROR_INVALID_REGISTRATION; } 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] = dev_instance; /* 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_VXLAN_TUNNEL); fib_prefix_t tun_dst_pfx; vnet_flood_class_t flood_class = VNET_FLOOD_CLASS_TUNNEL_NORMAL; fib_prefix_from_ip46_addr (&t->dst, &tun_dst_pfx); if (!ip46_address_is_multicast (&t->dst)) { /* 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->src); t->fib_entry_index = fib_table_entry_special_add (t->encap_fib_index, &tun_dst_pfx, FIB_SOURCE_RR, FIB_ENTRY_FLAG_NONE); t->sibling_index = fib_entry_child_add (t->fib_entry_index, FIB_NODE_TYPE_VXLAN_TUNNEL, dev_instance); vxlan_tunnel_restack_dpo (t); } else { /* Multicast tunnel - * as the same mcast group can be used for multiple mcast tunnels * with different VNIs, create the output fib adjacency only if * it does not already exist */ fib_protocol_t fp = fib_ip_proto (is_ip6); if (vtep_addr_ref (&t->dst) == 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_dst_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_VXLAN, &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_VXLAN, &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->dst, mfei, ai); } dpo_id_t dpo = DPO_INVALID; mcast_shared_t ep = mcast_shared_get (&t->dst); /* Stack shared mcast dst 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; u32 instance = is_ip6 ? key6.value : vxm->tunnel_index_by_sw_if_index[p->sw_if_index]; vxlan_tunnel_t *t = pool_elt_at_index (vxm->tunnels, instance); sw_if_index = t->sw_if_index; vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ ); vxm->tunnel_index_by_sw_if_index[sw_if_index] = ~0; if (!is_ip6) clib_bihash_add_del_16_8 (&vxm->vxlan4_tunnel_by_key, &key4, 0 /*del */ ); else clib_bihash_add_del_24_8 (&vxm->vxlan6_tunnel_by_key, &key6, 0 /*del */ ); if (!ip46_address_is_multicast (&t->dst)) { if (t->flow_index != ~0) vnet_flow_del (vnm, t->flow_index); vtep_addr_unref (&t->src); 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->dst) == 0) { mcast_shared_remove (&t->dst); } vnet_delete_hw_interface (vnm, t->hw_if_index); hash_unset (vxm->instance_used, t->user_instance); fib_node_deinit (&t->node); 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) { vxlan_main_t *vxm = &vxlan_main; vlib_main_t *vm = vxm->vlib_main; uword input_node = (ipv4_set) ? vxlan4_input_node.index : vxlan6_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); vxlan_main_t *vxm = &vxlan_main; vlib_main_t *vm = vxm->vlib_main; u32 node_index; u32 tmp; if (unformat (input, "l2")) *result = VXLAN_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 * vxlan_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 src = ip46_address_initializer, dst = ip46_address_initializer; u8 is_add = 1; u8 src_set = 0; u8 dst_set = 0; u8 grp_set = 0; u8 ipv4_set = 0; u8 ipv6_set = 0; u32 instance = ~0; u32 encap_fib_index = 0; u32 mcast_sw_if_index = ~0; u32 decap_next_index = VXLAN_INPUT_NEXT_L2_INPUT; u32 vni = 0; u32 table_id; clib_error_t *parse_error = NULL; /* 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_ip46_address, &src, IP46_TYPE_ANY)) { src_set = 1; ip46_address_is_ip4 (&src) ? (ipv4_set = 1) : (ipv6_set = 1); } else if (unformat (line_input, "dst %U", unformat_ip46_address, &dst, IP46_TYPE_ANY)) { dst_set = 1; ip46_address_is_ip4 (&dst) ? (ipv4_set = 1) : (ipv6_set = 1); } else if (unformat (line_input, "group %U %U", unformat_ip46_address, &dst, IP46_TYPE_ANY, unformat_vnet_sw_interface, vnet_get_main (), &mcast_sw_if_index)) { grp_set = dst_set = 1; ip46_address_is_ip4 (&dst) ? (ipv4_set = 1) : (ipv6_set = 1); } else if (unformat (line_input, "encap-vrf-id %d", &table_id)) { encap_fib_index = fib_table_find (fib_ip_proto (ipv6_set), table_id); } else if (unformat (line_input, "decap-next %U", unformat_decap_next, &decap_next_index, ipv4_set)) ; else if (unformat (line_input, "vni %d", &vni)) ; else { parse_error = clib_error_return (0, "parse error: '%U'", format_unformat_error, line_input); break; } } unformat_free (line_input); if (parse_error) return parse_error; if (encap_fib_index == ~0) return clib_error_return (0, "nonexistent encap-vrf-id %d", table_id); if (src_set == 0) return clib_error_return (0, "tunnel src address not specified"); if (dst_set == 0) return clib_error_return (0, "tunnel dst address not specified"); if (grp_set && !ip46_address_is_multicast (&dst)) return clib_error_return (0, "tunnel group address not multicast"); if (grp_set == 0 && ip46_address_is_multicast (&dst)) return clib_error_return (0, "dst address must be unicast"); if (grp_set && mcast_sw_if_index == ~0) return clib_error_return (0, "tunnel nonexistent multicast device"); if (ipv4_set && ipv6_set) return clib_error_return (0, "both IPv4 and IPv6 addresses specified"); if (ip46_address_cmp (&src, &dst) == 0) return clib_error_return (0, "src and dst addresses are identical"); if (decap_next_index == ~0) return clib_error_return (0, "next node not found"); if (vni == 0) return clib_error_return (0, "vni not specified"); if (vni >> 24) return clib_error_return (0, "vni %d out of range", vni); vnet_vxlan_add_del_tunnel_args_t a = { .is_add = is_add, .is_ip6 = ipv6_set, .instance = instance, #define _(x) .x = x, foreach_copy_field #undef _ }; u32 tunnel_sw_if_index; int rv = vnet_vxlan_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: return clib_error_return (0, "tunnel already exists..."); case VNET_API_ERROR_NO_SUCH_ENTRY: return clib_error_return (0, "tunnel does not exist..."); case VNET_API_ERROR_INSTANCE_IN_USE: return clib_error_return (0, "Instance is in use"); default: return clib_error_return (0, "vnet_vxlan_add_del_tunnel returned %d", rv); } return 0; } /*? * Add or delete a VXLAN Tunnel. * * VXLAN 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 VXLAN 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 VXLAN * (Virtual eXtensible VLAN) segment. * * @cliexpar * Example of how to create a VXLAN Tunnel: * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 encap-vrf-id 7} * Example of how to create a VXLAN Tunnel with a known name, vxlan_tunnel42: * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 instance 42} * Example of how to create a multicast VXLAN Tunnel with a known name, vxlan_tunnel23: * @cliexcmd{create vxlan tunnel src 10.0.3.1 group 239.1.1.1 GigabitEthernet0/8/0 instance 23} * Example of how to delete a VXLAN Tunnel: * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 del} ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (create_vxlan_tunnel_command, static) = { .path = "create vxlan tunnel", .short_help = "create vxlan tunnel src <local-vtep-addr>" " {dst <remote-vtep-addr>|group <mcast-vtep-addr> <intf-name>} vni <nn>" " [instance <id>]" " [encap-vrf-id <nn>] [decap-next [l2|node <name>]] [del]", .function = vxlan_add_del_tunnel_command_fn, }; /* *INDENT-ON* */ static clib_error_t * show_vxlan_tunnel_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { vxlan_main_t *vxm = &vxlan_main; vxlan_tunnel_t *t; int raw = 0; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "raw")) raw = 1; else return clib_error_return (0, "parse error: '%U'", format_unformat_error, input); } if (pool_elts (vxm->tunnels) == 0) vlib_cli_output (vm, "No vxlan tunnels configured..."); /* *INDENT-OFF* */ pool_foreach (t, vxm->tunnels, ({ vlib_cli_output (vm, "%U", format_vxlan_tunnel, t); })); /* *INDENT-ON* */ if (raw) { vlib_cli_output (vm, "Raw IPv4 Hash Table:\n%U\n", format_bihash_16_8, &vxm->vxlan4_tunnel_by_key, 1 /* verbose */ ); vlib_cli_output (vm, "Raw IPv6 Hash Table:\n%U\n", format_bihash_24_8, &vxm->vxlan6_tunnel_by_key, 1 /* verbose */ ); } return 0; } /*? * Display all the VXLAN Tunnel entries. * * @cliexpar * Example of how to display the VXLAN Tunnel entries: * @cliexstart{show vxlan tunnel} * [0] src 10.0.3.1 dst 10.0.3.3 vni 13 encap_fib_index 0 sw_if_index 5 decap_next l2 * @cliexend ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (show_vxlan_tunnel_command, static) = { .path = "show vxlan tunnel", .short_help = "show vxlan tunnel [raw]", .function = show_vxlan_tunnel_command_fn, }; /* *INDENT-ON* */ void vnet_int_vxlan_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable) { vxlan_main_t *vxm = &vxlan_main; if (pool_is_free_index (vxm->vnet_main->interface_main.sw_interfaces, sw_if_index)) return; is_enable = ! !is_enable; if (is_ip6) { if (clib_bitmap_get (vxm->bm_ip6_bypass_enabled_by_sw_if, sw_if_index) != is_enable) { vnet_feature_enable_disable ("ip6-unicast", "ip6-vxlan-bypass", sw_if_index, is_enable, 0, 0); vxm->bm_ip6_bypass_enabled_by_sw_if = clib_bitmap_set (vxm->bm_ip6_bypass_enabled_by_sw_if, sw_if_index, is_enable); } } else { if (clib_bitmap_get (vxm->bm_ip4_bypass_enabled_by_sw_if, sw_if_index) != is_enable) { vnet_feature_enable_disable ("ip4-unicast", "ip4-vxlan-bypass", sw_if_index, is_enable, 0, 0); vxm->bm_ip4_bypass_enabled_by_sw_if = clib_bitmap_set (vxm->bm_ip4_bypass_enabled_by_sw_if, sw_if_index, is_enable); } } } static clib_error_t * set_ip_vxlan_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_vxlan_bypass_mode (sw_if_index, is_ip6, is_enable); done: unformat_free (line_input); return error; } static clib_error_t * set_ip4_vxlan_bypass (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { return set_ip_vxlan_bypass (0, input, cmd); } /*? * This command adds the 'ip4-vxlan-bypass' graph node for a given interface. * By adding the IPv4 vxlan-bypass graph node to an interface, the node checks * for and validate input vxlan packet and bypass ip4-lookup, ip4-local, * ip4-udp-lookup nodes to speedup vxlan packet forwarding. This node will * cause extra overhead to for non-vxlan packets which is kept at a minimum. * * @cliexpar * @parblock * Example of graph node before ip4-vxlan-bypass is enabled: * @cliexstart{show vlib graph ip4-vxlan-bypass} * Name Next Previous * ip4-vxlan-bypass error-drop [0] * vxlan4-input [1] * ip4-lookup [2] * @cliexend * * Example of how to enable ip4-vxlan-bypass on an interface: * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0} * * Example of graph node after ip4-vxlan-bypass is enabled: * @cliexstart{show vlib graph ip4-vxlan-bypass} * Name Next Previous * ip4-vxlan-bypass error-drop [0] ip4-input * vxlan4-input [1] ip4-input-no-checksum * ip4-lookup [2] * @cliexend * * Example of how to display the feature enabled on an interface: * @cliexstart{show ip interface features GigabitEthernet2/0/0} * IP feature paths configured on GigabitEthernet2/0/0... * ... * ipv4 unicast: * ip4-vxlan-bypass * ip4-lookup * ... * @cliexend * * Example of how to disable ip4-vxlan-bypass on an interface: * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0 del} * @endparblock ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (set_interface_ip_vxlan_bypass_command, static) = { .path = "set interface ip vxlan-bypass", .function = set_ip4_vxlan_bypass, .short_help = "set interface ip vxlan-bypass <interface> [del]", }; /* *INDENT-ON* */ static clib_error_t * set_ip6_vxlan_bypass (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { return set_ip_vxlan_bypass (1, input, cmd); } /*? * This command adds the 'ip6-vxlan-bypass' graph node for a given interface. * By adding the IPv6 vxlan-bypass graph node to an interface, the node checks * for and validate input vxlan packet and bypass ip6-lookup, ip6-local, * ip6-udp-lookup nodes to speedup vxlan packet forwarding. This node will * cause extra overhead to for non-vxlan packets which is kept at a minimum. * * @cliexpar * @parblock * Example of graph node before ip6-vxlan-bypass is enabled: * @cliexstart{show vlib graph ip6-vxlan-bypass} * Name Next Previous * ip6-vxlan-bypass error-drop [0] * vxlan6-input [1] * ip6-lookup [2] * @cliexend * * Example of how to enable ip6-vxlan-bypass on an interface: * @cliexcmd{set interface ip6 vxlan-bypass GigabitEthernet2/0/0} * * Example of graph node after ip6-vxlan-bypass is enabled: * @cliexstart{show vlib graph ip6-vxlan-bypass} * Name Next Previous * ip6-vxlan-bypass error-drop [0] ip6-input * vxlan6-input [1] ip4-input-no-checksum * ip6-lookup [2] * @cliexend * * Example of how to display the feature enabled on an interface: * @cliexstart{show ip interface features GigabitEthernet2/0/0} * IP feature paths configured on GigabitEthernet2/0/0... * ... * ipv6 unicast: * ip6-vxlan-bypass * ip6-lookup * ... * @cliexend * * Example of how to disable ip6-vxlan-bypass on an interface: * @cliexcmd{set interface ip6 vxlan-bypass GigabitEthernet2/0/0 del} * @endparblock ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (set_interface_ip6_vxlan_bypass_command, static) = { .path = "set interface ip6 vxlan-bypass", .function = set_ip6_vxlan_bypass, .short_help = "set interface ip vxlan-bypass <interface> [del]", }; /* *INDENT-ON* */ int vnet_vxlan_add_del_rx_flow (u32 hw_if_index, u32 t_index, int is_add) { vxlan_main_t *vxm = &vxlan_main; vxlan_tunnel_t *t = pool_elt_at_index (vxm->tunnels, t_index); vnet_main_t *vnm = vnet_get_main (); if (is_add) { if (t->flow_index == ~0) { vxlan_main_t *vxm = &vxlan_main; vnet_flow_t flow = { .actions = VNET_FLOW_ACTION_REDIRECT_TO_NODE | VNET_FLOW_ACTION_MARK, .mark_flow_id = t->dev_instance + vxm->flow_id_start, .redirect_node_index = vxlan4_flow_input_node.index, .type = VNET_FLOW_TYPE_IP4_VXLAN, .ip4_vxlan = { .src_addr = t->dst.ip4, .dst_addr = t->src.ip4, .dst_port = UDP_DST_PORT_vxlan, .vni = t->vni, } , }; vnet_flow_add (vnm, &flow, &t->flow_index); } return vnet_flow_enable (vnm, t->flow_index, hw_if_index); } /* flow index is removed when the tunnel is deleted */ return vnet_flow_disable (vnm, t->flow_index, hw_if_index); } u32 vnet_vxlan_get_tunnel_index (u32 sw_if_index) { vxlan_main_t *vxm = &vxlan_main; if (sw_if_index >= vec_len (vxm->tunnel_index_by_sw_if_index)) return ~0; return vxm->tunnel_index_by_sw_if_index[sw_if_index]; } static clib_error_t * vxlan_offload_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; vnet_main_t *vnm = vnet_get_main (); u32 rx_sw_if_index = ~0; u32 hw_if_index = ~0; int is_add = 1; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "hw %U", unformat_vnet_hw_interface, vnm, &hw_if_index)) continue; if (unformat (line_input, "rx %U", unformat_vnet_sw_interface, vnm, &rx_sw_if_index)) continue; if (unformat (line_input, "del")) { is_add = 0; continue; } return clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); } if (rx_sw_if_index == ~0) return clib_error_return (0, "missing rx interface"); if (hw_if_index == ~0) return clib_error_return (0, "missing hw interface"); u32 t_index = vnet_vxlan_get_tunnel_index (rx_sw_if_index);; if (t_index == ~0) return clib_error_return (0, "%U is not a vxlan tunnel", format_vnet_sw_if_index_name, vnm, rx_sw_if_index); vxlan_main_t *vxm = &vxlan_main; vxlan_tunnel_t *t = pool_elt_at_index (vxm->tunnels, t_index); if (!ip46_address_is_ip4 (&t->dst)) return clib_error_return (0, "currently only IPV4 tunnels are supported"); vnet_hw_interface_t *hw_if = vnet_get_hw_interface (vnm, hw_if_index); ip4_main_t *im = &ip4_main; u32 rx_fib_index = vec_elt (im->fib_index_by_sw_if_index, hw_if->sw_if_index); if (t->encap_fib_index != rx_fib_index) return clib_error_return (0, "interface/tunnel fib mismatch"); if (vnet_vxlan_add_del_rx_flow (hw_if_index, t_index, is_add)) return clib_error_return (0, "error %s flow", is_add ? "enabling" : "disabling"); return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (vxlan_offload_command, static) = { .path = "set flow-offload vxlan", .short_help = "set flow-offload vxlan hw <interface-name> rx <tunnel-name> [del]", .function = vxlan_offload_command_fn, }; /* *INDENT-ON* */ #define VXLAN_HASH_NUM_BUCKETS (2 * 1024) #define VXLAN_HASH_MEMORY_SIZE (1 << 20) clib_error_t * vxlan_init (vlib_main_t * vm) { vxlan_main_t *vxm = &vxlan_main; vxm->vnet_main = vnet_get_main (); vxm->vlib_main = vm; vnet_flow_get_range (vxm->vnet_main, "vxlan", 1024 * 1024, &vxm->flow_id_start); vxm->bm_ip4_bypass_enabled_by_sw_if = 0; vxm->bm_ip6_bypass_enabled_by_sw_if = 0; /* initialize the ip6 hash */ clib_bihash_init_16_8 (&vxm->vxlan4_tunnel_by_key, "vxlan4", VXLAN_HASH_NUM_BUCKETS, VXLAN_HASH_MEMORY_SIZE); clib_bihash_init_24_8 (&vxm->vxlan6_tunnel_by_key, "vxlan6", VXLAN_HASH_NUM_BUCKETS, VXLAN_HASH_MEMORY_SIZE); 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_vxlan, vxlan4_input_node.index, /* is_ip4 */ 1); udp_register_dst_port (vm, UDP_DST_PORT_vxlan6, vxlan6_input_node.index, /* is_ip4 */ 0); fib_node_register_type (FIB_NODE_TYPE_VXLAN_TUNNEL, &vxlan_vft); return 0; } VLIB_INIT_FUNCTION (vxlan_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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