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Diffstat (limited to 'src/vnet/vxlan/vxlan.c')
| -rw-r--r-- | src/vnet/vxlan/vxlan.c | 1113 |
1 files changed, 1113 insertions, 0 deletions
diff --git a/src/vnet/vxlan/vxlan.c b/src/vnet/vxlan/vxlan.c new file mode 100644 index 00000000..dc973372 --- /dev/null +++ b/src/vnet/vxlan/vxlan.c @@ -0,0 +1,1113 @@ +/* + * 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/interface.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); + + switch (next_index) + { + case VXLAN_INPUT_NEXT_DROP: + return format (s, "drop"); + case VXLAN_INPUT_NEXT_L2_INPUT: + return format (s, "l2"); + default: + 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 *); + vxlan_main_t * ngm = &vxlan_main; + + s = format (s, "[%d] src %U dst %U vni %d sw_if_index %d ", + t - ngm->tunnels, + format_ip46_address, &t->src, IP46_TYPE_ANY, + format_ip46_address, &t->dst, IP46_TYPE_ANY, + t->vni, t->sw_if_index); + + if (ip46_address_is_multicast (&t->dst)) + s = format (s, "mcast_sw_if_index %d ", t->mcast_sw_if_index); + + s = format (s, "encap_fib_index %d fib_entry_index %d decap_next %U\n", + t->encap_fib_index, t->fib_entry_index, + format_decap_next, t->decap_next_index); + return s; +} + +static u8 * format_vxlan_name (u8 * s, va_list * args) +{ + u32 dev_instance = va_arg (*args, u32); + return format (s, "vxlan_tunnel%d", dev_instance); +} + +static uword dummy_interface_tx (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + clib_warning ("you shouldn't be here, leaking buffers..."); + return frame->n_vectors; +} + +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; +} + +VNET_DEVICE_CLASS (vxlan_device_class,static) = { + .name = "VXLAN", + .format_device_name = format_vxlan_name, + .format_tx_trace = format_vxlan_encap_trace, + .tx_function = dummy_interface_tx, + .admin_up_down_function = vxlan_interface_admin_up_down, +}; + +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; +} + +VNET_HW_INTERFACE_CLASS (vxlan_hw_class) = { + .name = "VXLAN", + .format_header = format_vxlan_header_with_length, + .build_rewrite = default_build_rewrite, +}; + +static void +vxlan_tunnel_restack_dpo(vxlan_tunnel_t * t) +{ + dpo_id_t dpo = DPO_INVALID; + u32 encap_index = ip46_address_is_ip4(&t->dst) ? + vxlan4_encap_node.index : vxlan6_encap_node.index; + fib_forward_chain_type_t forw_type = ip46_address_is_ip4(&t->dst) ? + 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 vxlan_tunnel_t * +vxlan_tunnel_from_fib_node (fib_node_t *node) +{ +#if (CLIB_DEBUG > 0) + ASSERT(FIB_NODE_TYPE_VXLAN_TUNNEL == node->fn_type); +#endif + 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 int +vxlan_rewrite (vxlan_tunnel_t * t, bool is_ip6) +{ + union { + ip4_vxlan_header_t * h4; + ip6_vxlan_header_t * h6; + u8 *rw; + } r = { .rw = 0 }; + int len = is_ip6 ? sizeof *r.h6 : sizeof *r.h4; + + vec_validate_aligned (r.rw, len-1, CLIB_CACHE_LINE_BYTES); + + udp_header_t * udp; + vxlan_header_t * vxlan; + /* Fixed portion of the (outer) ip header */ + if (!is_ip6) + { + ip4_header_t * ip = &r.h4->ip4; + udp = &r.h4->udp, vxlan = &r.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 = &r.h6->ip6; + udp = &r.h6->udp, vxlan = &r.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); + + t->rewrite = r.rw; + return (0); +} + +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 void +hash_set_key_copy (uword ** h, void * key, uword v) { + size_t ksz = hash_header(*h)->user; + void * copy = clib_mem_alloc (ksz); + clib_memcpy (copy, key, ksz); + hash_set_mem (*h, copy, v); +} + +static void +hash_unset_key_free (uword ** h, void * key) { + hash_pair_t * hp = hash_get_pair_mem (*h, key); + ASSERT (hp); + key = uword_to_pointer (hp->key, void *); + hash_unset_mem (*h, key); + clib_mem_free (key); +} + +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_key_copy (&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_key_free (&vxlan_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 (vxlan_main.mcast_shared, ip); + ASSERT(p); + return (mcast_shared_t) { .as_u64 = *p }; +} + +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_key_copy (&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_key_free (&vxlan_main.mcast_shared, dst); +} + +static inline fib_protocol_t +fib_ip_proto(bool is_ip6) +{ + return (is_ip6) ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4; +} + +int vnet_vxlan_add_del_tunnel +(vnet_vxlan_add_del_tunnel_args_t *a, u32 * sw_if_indexp) +{ + vxlan_main_t * vxm = &vxlan_main; + vxlan_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; + vxlan4_tunnel_key_t key4; + vxlan6_tunnel_key_t key6; + u32 is_ip6 = a->is_ip6; + + if (!is_ip6) + { + key4.src = a->dst.ip4.as_u32; /* decap src in key is encap dst in config */ + key4.vni = clib_host_to_net_u32 (a->vni << 8); + p = hash_get (vxm->vxlan4_tunnel_by_key, key4.as_u64); + } + else + { + key6.src = a->dst.ip6; + key6.vni = clib_host_to_net_u32 (a->vni << 8); + p = hash_get_mem (vxm->vxlan6_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 = 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; + + 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 = vxlan_rewrite (t, is_ip6); + if (rv) + { + pool_put (vxm->tunnels, t); + return rv; + } + + /* copy the key */ + if (is_ip6) + hash_set_key_copy (&vxm->vxlan6_tunnel_by_key, &key6, t - vxm->tunnels); + else + hash_set (vxm->vxlan4_tunnel_by_key, key4.as_u64, t - vxm->tunnels); + + vnet_hw_interface_t * hi; + if (vec_len (vxm->free_vxlan_tunnel_hw_if_indices) > 0) + { + vnet_interface_main_t * im = &vnm->interface_main; + hw_if_index = vxm->free_vxlan_tunnel_hw_if_indices + [vec_len (vxm->free_vxlan_tunnel_hw_if_indices)-1]; + _vec_len (vxm->free_vxlan_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, vxlan_device_class.index, t - vxm->tunnels, + vxlan_hw_class.index, t - vxm->tunnels); + hi = vnet_get_hw_interface (vnm, hw_if_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_VXLAN_TUNNEL); + fib_prefix_t tun_dst_pfx; + u32 encap_index = !is_ip6 ? + vxlan4_encap_node.index : vxlan6_encap_node.index; + 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, t - vxm->tunnels); + vxlan_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, + &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; + } + + /* Set vxlan tunnel output node */ + hi->output_node_index = encap_index; + + 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, 0, 0, 0); + vec_add1 (vxm->free_vxlan_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->vxlan4_tunnel_by_key, key4.as_u64); + else + hash_unset_key_free (&vxm->vxlan6_tunnel_by_key, &key6); + + 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); + } + + 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) +{ + 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 , dst; + 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 encap_fib_index = 0; + u32 mcast_sw_if_index = ~0; + u32 decap_next_index = VXLAN_INPUT_NEXT_L2_INPUT; + u32 vni = 0; + u32 tmp; + int rv; + vnet_vxlan_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(&src, 0, sizeof src); + memset(&dst, 0, sizeof dst); + + /* 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, "src %U", + unformat_ip4_address, &src.ip4)) + { + src_set = 1; + ipv4_set = 1; + } + else if (unformat (line_input, "dst %U", + unformat_ip4_address, &dst.ip4)) + { + dst_set = 1; + ipv4_set = 1; + } + else if (unformat (line_input, "src %U", + unformat_ip6_address, &src.ip6)) + { + src_set = 1; + ipv6_set = 1; + } + else if (unformat (line_input, "dst %U", + unformat_ip6_address, &dst.ip6)) + { + dst_set = 1; + ipv6_set = 1; + } + else if (unformat (line_input, "group %U %U", + unformat_ip4_address, &dst.ip4, + unformat_vnet_sw_interface, + vnet_get_main(), &mcast_sw_if_index)) + { + grp_set = dst_set = 1; + ipv4_set = 1; + } + else if (unformat (line_input, "group %U %U", + unformat_ip6_address, &dst.ip6, + unformat_vnet_sw_interface, + vnet_get_main(), &mcast_sw_if_index)) + { + grp_set = dst_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 (src_set == 0) + { + error = clib_error_return (0, "tunnel src address not specified"); + goto done; + } + + if (dst_set == 0) + { + error = clib_error_return (0, "tunnel dst address not specified"); + goto done; + } + + if (grp_set && !ip46_address_is_multicast(&dst)) + { + error = clib_error_return (0, "tunnel group address not multicast"); + goto done; + } + + if (grp_set == 0 && ip46_address_is_multicast(&dst)) + { + error = clib_error_return (0, "dst 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(&src, &dst) == 0) + { + error = clib_error_return (0, "src and dst 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_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: + 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_vxlan_add_del_tunnel returned %d", rv); + goto done; + } + +done: + unformat_free (line_input); + + return error; +} + +/*? + * 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 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>" + " [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; + + if (pool_elts (vxm->tunnels) == 0) + vlib_cli_output (vm, "No vxlan tunnels configured..."); + + pool_foreach (t, vxm->tunnels, + ({ + vlib_cli_output (vm, "%U", format_vxlan_tunnel, t); + })); + + 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", + .function = show_vxlan_tunnel_command_fn, +}; +/* *INDENT-ON* */ + + +void vnet_int_vxlan_bypass_mode (u32 sw_if_index, + u8 is_ip6, + u8 is_enable) +{ + if (is_ip6) + vnet_feature_enable_disable ("ip6-unicast", "ip6-vxlan-bypass", + sw_if_index, is_enable, 0, 0); + else + vnet_feature_enable_disable ("ip4-unicast", "ip4-vxlan-bypass", + sw_if_index, is_enable, 0, 0); +} + + +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 enabed 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 enabed 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* */ + +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; + + /* initialize the ip6 hash */ + vxm->vxlan6_tunnel_by_key = hash_create_mem(0, + sizeof(vxlan6_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_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); |