diff options
Diffstat (limited to 'src/vnet/vxlan-gbp/vxlan_gbp.c')
| -rw-r--r-- | src/vnet/vxlan-gbp/vxlan_gbp.c | 1109 |
1 files changed, 1109 insertions, 0 deletions
diff --git a/src/vnet/vxlan-gbp/vxlan_gbp.c b/src/vnet/vxlan-gbp/vxlan_gbp.c new file mode 100644 index 00000000000..14b3e667dbf --- /dev/null +++ b/src/vnet/vxlan-gbp/vxlan_gbp.c @@ -0,0 +1,1109 @@ +/* + * Copyright (c) 2018 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-gbp/vxlan_gbp.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 <vlib/vlib.h> + +/** + * @file + * @brief VXLAN GBP. + * + * VXLAN GBP provides the features of vxlan and carry group policy id. + */ + + +vxlan_gbp_main_t vxlan_gbp_main; + +static u8 * +format_decap_next (u8 * s, va_list * args) +{ + u32 next_index = va_arg (*args, u32); + + if (next_index == VXLAN_GBP_INPUT_NEXT_DROP) + return format (s, "drop"); + else + return format (s, "index %d", next_index); + return s; +} + +u8 * +format_vxlan_gbp_tunnel (u8 * s, va_list * args) +{ + vxlan_gbp_tunnel_t *t = va_arg (*args, vxlan_gbp_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_GBP_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); + + return s; +} + +static u8 * +format_vxlan_gbp_name (u8 * s, va_list * args) +{ + u32 dev_instance = va_arg (*args, u32); + vxlan_gbp_main_t *vxm = &vxlan_gbp_main; + vxlan_gbp_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_gbp_tunnel%d", t->user_instance); +} + +static clib_error_t * +vxlan_gbp_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_gbp_device_class, static) = { + .name = "VXLAN-GBP", + .format_device_name = format_vxlan_gbp_name, + .format_tx_trace = format_vxlan_gbp_encap_trace, + .admin_up_down_function = vxlan_gbp_interface_admin_up_down, +}; +/* *INDENT-ON* */ + +static u8 * +format_vxlan_gbp_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_gbp_hw_class) = { + .name = "VXLAN-GBP", + .format_header = format_vxlan_gbp_header_with_length, + .build_rewrite = default_build_rewrite, +}; +/* *INDENT-ON* */ + +static void +vxlan_gbp_tunnel_restack_dpo (vxlan_gbp_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_gbp 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_gbp_encap_node.index : vxlan6_gbp_encap_node.index; + dpo_stack_from_node (encap_index, &t->next_dpo, &dpo); + dpo_reset (&dpo); +} + +static vxlan_gbp_tunnel_t * +vxlan_gbp_tunnel_from_fib_node (fib_node_t * node) +{ + ASSERT (FIB_NODE_TYPE_VXLAN_GBP_TUNNEL == node->fn_type); + return ((vxlan_gbp_tunnel_t *) (((char *) node) - + STRUCT_OFFSET_OF (vxlan_gbp_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_gbp_tunnel_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx) +{ + vxlan_gbp_tunnel_restack_dpo (vxlan_gbp_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_gbp_tunnel_fib_node_get (fib_node_index_t index) +{ + vxlan_gbp_tunnel_t *t; + vxlan_gbp_main_t *vxm = &vxlan_gbp_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_gbp_tunnel_last_lock_gone (fib_node_t * node) +{ + /* + * The VXLAN GBP 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 GBP tunnels + * for participation in the FIB object graph. + */ +const static fib_node_vft_t vxlan_gbp_vft = { + .fnv_get = vxlan_gbp_tunnel_fib_node_get, + .fnv_last_lock = vxlan_gbp_tunnel_last_lock_gone, + .fnv_back_walk = vxlan_gbp_tunnel_back_walk, +}; + + +#define foreach_copy_field \ +_(vni) \ +_(mcast_sw_if_index) \ +_(encap_fib_index) \ +_(decap_next_index) \ +_(src) \ +_(dst) + +static void +vxlan_gbp_rewrite (vxlan_gbp_tunnel_t * t, bool is_ip6) +{ + union + { + ip4_vxlan_gbp_header_t h4; + ip6_vxlan_gbp_header_t h6; + } h; + int len = is_ip6 ? sizeof h.h6 : sizeof h.h4; + + udp_header_t *udp; + vxlan_gbp_header_t *vxlan_gbp; + /* Fixed portion of the (outer) ip header */ + + memset (&h, 0, sizeof (h)); + if (!is_ip6) + { + ip4_header_t *ip = &h.h4.ip4; + udp = &h.h4.udp, vxlan_gbp = &h.h4.vxlan_gbp; + 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_gbp = &h.h6.vxlan_gbp; + 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 (47789); + udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_vxlan_gbp); + + /* VXLAN header */ + vxlan_gbp_set_header (vxlan_gbp, t->vni); + vnet_rewrite_set_data (*t, &h, len); +} + +static bool +vxlan_gbp_decap_next_is_valid (vxlan_gbp_main_t * vxm, u32 is_ip6, + u32 decap_next_index) +{ + vlib_main_t *vm = vxm->vlib_main; + u32 input_idx = (!is_ip6) ? + vxlan4_gbp_input_node.index : vxlan6_gbp_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_gbp_main.vtep4, ip->ip4.as_u32) : + hash_get_mem (vxlan_gbp_main.vtep6, &ip->ip6); + if (vtep) + return ++(*vtep); + ip46_address_is_ip4 (ip) ? + hash_set (vxlan_gbp_main.vtep4, ip->ip4.as_u32, 1) : + hash_set_mem_alloc (&vxlan_gbp_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_gbp_main.vtep4, ip->ip4.as_u32) : + hash_get_mem (vxlan_gbp_main.vtep6, &ip->ip6); + ASSERT (vtep); + if (--(*vtep) != 0) + return *vtep; + ip46_address_is_ip4 (ip) ? + hash_unset (vxlan_gbp_main.vtep4, ip->ip4.as_u32) : + hash_unset_mem_free (&vxlan_gbp_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_gbp_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_gbp_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_GBP); + + hash_unset_mem_free (&vxlan_gbp_main.mcast_shared, dst); +} + +int vnet_vxlan_gbp_add_del_tunnel + (vnet_vxlan_gbp_add_del_tunnel_args_t * a, u32 * sw_if_indexp) +{ + vxlan_gbp_main_t *vxm = &vxlan_gbp_main; + vxlan_gbp_tunnel_t *t = 0; + vnet_main_t *vnm = vxm->vnet_main; + u64 *p; + u32 sw_if_index = ~0; + vxlan4_gbp_tunnel_key_t key4; + vxlan6_gbp_tunnel_key_t key6; + u32 is_ip6 = a->is_ip6; + + int not_found; + if (!is_ip6) + { + key4.key[0] = a->dst.ip4.as_u32; + 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_gbp_tunnel_by_key, + &key4); + p = &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_gbp_tunnel_by_key, + &key6); + p = &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_GBP_INPUT_NEXT_L2_INPUT; + if (!vxlan_gbp_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)); + dev_instance = t - vxm->tunnels; + + /* copy from arg structure */ +#define _(x) t->x = a->x; + foreach_copy_field; +#undef _ + + vxlan_gbp_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 */ + + /* copy the key */ + int add_failed; + if (is_ip6) + { + key6.value = (u64) dev_instance; + add_failed = + clib_bihash_add_del_24_8 (&vxm->vxlan6_gbp_tunnel_by_key, &key6, + 1 /*add */ ); + } + else + { + key4.value = (u64) dev_instance; + add_failed = + clib_bihash_add_del_16_8 (&vxm->vxlan4_gbp_tunnel_by_key, &key4, + 1 /*add */ ); + } + + if (add_failed) + { + pool_put (vxm->tunnels, t); + return VNET_API_ERROR_INVALID_REGISTRATION; + } + + t->hw_if_index = vnet_register_interface + (vnm, vxlan_gbp_device_class.index, dev_instance, + vxlan_gbp_hw_class.index, dev_instance); + vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, t->hw_if_index); + + /* Set vxlan_gbp tunnel output node */ + u32 encap_index = !is_ip6 ? + vxlan4_gbp_encap_node.index : vxlan6_gbp_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; + + 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_GBP_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_GBP_TUNNEL, + dev_instance); + vxlan_gbp_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->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_GBP, + &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_GBP, + &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 = p[0]; + 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_gbp_tunnel_by_key, &key4, + 0 /*del */ ); + else + clib_bihash_add_del_24_8 (&vxm->vxlan6_gbp_tunnel_by_key, &key6, + 0 /*del */ ); + + if (!ip46_address_is_multicast (&t->dst)) + { + 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_gbp_main_t *vxm = &vxlan_gbp_main; + vlib_main_t *vm = vxm->vlib_main; + uword input_node = (ipv4_set) ? vxlan4_gbp_input_node.index : + vxlan6_gbp_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_gbp_main_t *vxm = &vxlan_gbp_main; + vlib_main_t *vm = vxm->vlib_main; + u32 node_index; + u32 tmp; + + if (unformat (input, "l2")) + *result = VXLAN_GBP_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_gbp_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_GBP_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_gbp_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_gbp_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_gbp_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_gbp 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_gbp_tunnel42: + * @cliexcmd{create vxlan_gbp 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_gbp_tunnel23: + * @cliexcmd{create vxlan_gbp tunnel src 10.0.3.1 group 239.1.1.1 GigabitEtherner0/8/0 instance 23} + * Example of how to delete a VXLAN Tunnel: + * @cliexcmd{create vxlan_gbp tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 del} + ?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (create_vxlan_gbp_tunnel_command, static) = { + .path = "create vxlan-gbp tunnel", + .short_help = + "create vxlan-gbp 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_gbp_add_del_tunnel_command_fn, +}; +/* *INDENT-ON* */ + +static clib_error_t * +show_vxlan_gbp_tunnel_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + vxlan_gbp_main_t *vxm = &vxlan_gbp_main; + vxlan_gbp_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-gbp tunnels configured..."); + +/* *INDENT-OFF* */ + pool_foreach (t, vxm->tunnels, + ({ + vlib_cli_output (vm, "%U", format_vxlan_gbp_tunnel, t); + })); +/* *INDENT-ON* */ + + if (raw) + { + vlib_cli_output (vm, "Raw IPv4 Hash Table:\n%U\n", + format_bihash_16_8, &vxm->vxlan4_gbp_tunnel_by_key, + 1 /* verbose */ ); + vlib_cli_output (vm, "Raw IPv6 Hash Table:\n%U\n", + format_bihash_24_8, &vxm->vxlan6_gbp_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_gbp 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_gbp_tunnel_command, static) = { + .path = "show vxlan-gbp tunnel", + .short_help = "show vxlan-gbp tunnel [raw]", + .function = show_vxlan_gbp_tunnel_command_fn, +}; +/* *INDENT-ON* */ + + +void +vnet_int_vxlan_gbp_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable) +{ + if (is_ip6) + vnet_feature_enable_disable ("ip6-unicast", "ip6-vxlan-gbp-bypass", + sw_if_index, is_enable, 0, 0); + else + vnet_feature_enable_disable ("ip4-unicast", "ip4-vxlan-gbp-bypass", + sw_if_index, is_enable, 0, 0); +} + + +static clib_error_t * +set_ip_vxlan_gbp_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_gbp_bypass_mode (sw_if_index, is_ip6, is_enable); + +done: + unformat_free (line_input); + + return error; +} + +static clib_error_t * +set_ip4_vxlan_gbp_bypass (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + return set_ip_vxlan_gbp_bypass (0, input, cmd); +} + +/*? + * This command adds the 'ip4-vxlan-gbp-bypass' graph node for a given interface. + * By adding the IPv4 vxlan_gbp-bypass graph node to an interface, the node checks + * for and validate input vxlan_gbp packet and bypass ip4-lookup, ip4-local, + * ip4-udp-lookup nodes to speedup vxlan_gbp packet forwarding. This node will + * cause extra overhead to for non-vxlan_gbp packets which is kept at a minimum. + * + * @cliexpar + * @parblock + * Example of graph node before ip4-vxlan_gbp-bypass is enabled: + * @cliexstart{show vlib graph ip4-vxlan_gbp-bypass} + * Name Next Previous + * ip4-vxlan-gbp-bypass error-drop [0] + * vxlan4-gbp-input [1] + * ip4-lookup [2] + * @cliexend + * + * Example of how to enable ip4-vxlan-gbp-bypass on an interface: + * @cliexcmd{set interface ip vxlan-gbp-bypass GigabitEthernet2/0/0} + * + * Example of graph node after ip4-vxlan-gbp-bypass is enabled: + * @cliexstart{show vlib graph ip4-vxlan-gbp-bypass} + * Name Next Previous + * ip4-vxlan-gbp-bypass error-drop [0] ip4-input + * vxlan4-gbp-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-vxlan-gbp-bypass + * ip4-lookup + * ... + * @cliexend + * + * Example of how to disable ip4-vxlan-gbp-bypass on an interface: + * @cliexcmd{set interface ip vxlan-gbp-bypass GigabitEthernet2/0/0 del} + * @endparblock +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (set_interface_ip_vxlan_gbp_bypass_command, static) = { + .path = "set interface ip vxlan-gbp-bypass", + .function = set_ip4_vxlan_gbp_bypass, + .short_help = "set interface ip vxlan-gbp-bypass <interface> [del]", +}; +/* *INDENT-ON* */ + +static clib_error_t * +set_ip6_vxlan_gbp_bypass (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + return set_ip_vxlan_gbp_bypass (1, input, cmd); +} + +/*? + * This command adds the 'ip6-vxlan-gbp-bypass' graph node for a given interface. + * By adding the IPv6 vxlan-gbp-bypass graph node to an interface, the node checks + * for and validate input vxlan_gbp packet and bypass ip6-lookup, ip6-local, + * ip6-udp-lookup nodes to speedup vxlan_gbp 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-gbp-bypass is enabled: + * @cliexstart{show vlib graph ip6-vxlan-gbp-bypass} + * Name Next Previous + * ip6-vxlan-gbp-bypass error-drop [0] + * vxlan6-gbp-input [1] + * ip6-lookup [2] + * @cliexend + * + * Example of how to enable ip6-vxlan-gbp-bypass on an interface: + * @cliexcmd{set interface ip6 vxlan-gbp-bypass GigabitEthernet2/0/0} + * + * Example of graph node after ip6-vxlan-gbp-bypass is enabled: + * @cliexstart{show vlib graph ip6-vxlan-gbp-bypass} + * Name Next Previous + * ip6-vxlan-gbp-bypass error-drop [0] ip6-input + * vxlan6-gbp-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-vxlan-gbp-bypass + * ip6-lookup + * ... + * @cliexend + * + * Example of how to disable ip6-vxlan-gbp-bypass on an interface: + * @cliexcmd{set interface ip6 vxlan-gbp-bypass GigabitEthernet2/0/0 del} + * @endparblock +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (set_interface_ip6_vxlan_gbp_bypass_command, static) = { + .path = "set interface ip6 vxlan-gbp-bypass", + .function = set_ip6_vxlan_gbp_bypass, + .short_help = "set interface ip vxlan-gbp-bypass <interface> [del]", +}; +/* *INDENT-ON* */ + +#define VXLAN_GBP_HASH_NUM_BUCKETS (2 * 1024) +#define VXLAN_GBP_HASH_MEMORY_SIZE (1 << 20) + +clib_error_t * +vxlan_gbp_init (vlib_main_t * vm) +{ + vxlan_gbp_main_t *vxm = &vxlan_gbp_main; + + vxm->vnet_main = vnet_get_main (); + vxm->vlib_main = vm; + + /* initialize the ip6 hash */ + clib_bihash_init_16_8 (&vxm->vxlan4_gbp_tunnel_by_key, "vxlan4-gbp", + VXLAN_GBP_HASH_NUM_BUCKETS, + VXLAN_GBP_HASH_MEMORY_SIZE); + clib_bihash_init_24_8 (&vxm->vxlan6_gbp_tunnel_by_key, "vxlan6-gbp", + VXLAN_GBP_HASH_NUM_BUCKETS, + VXLAN_GBP_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_gbp, + vxlan4_gbp_input_node.index, /* is_ip4 */ 1); + udp_register_dst_port (vm, UDP_DST_PORT_vxlan6_gbp, + vxlan6_gbp_input_node.index, /* is_ip4 */ 0); + + fib_node_register_type (FIB_NODE_TYPE_VXLAN_GBP_TUNNEL, &vxlan_gbp_vft); + + return 0; +} + +VLIB_INIT_FUNCTION (vxlan_gbp_init); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |