diff options
Diffstat (limited to 'src/plugins/vxlan-gpe/vxlan_gpe.c')
| -rw-r--r-- | src/plugins/vxlan-gpe/vxlan_gpe.c | 1259 |
1 files changed, 1259 insertions, 0 deletions
diff --git a/src/plugins/vxlan-gpe/vxlan_gpe.c b/src/plugins/vxlan-gpe/vxlan_gpe.c new file mode 100644 index 00000000000..abb2049a356 --- /dev/null +++ b/src/plugins/vxlan-gpe/vxlan_gpe.c @@ -0,0 +1,1259 @@ +/* + * 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. + */ +/** + * @file + * @brief Common utility functions for IPv4 and IPv6 VXLAN GPE tunnels + * +*/ +#include <vxlan-gpe/vxlan_gpe.h> +#include <vnet/fib/fib.h> +#include <vnet/ip/format.h> +#include <vnet/fib/fib_entry.h> +#include <vnet/fib/fib_table.h> +#include <vnet/fib/fib_entry_track.h> +#include <vnet/mfib/mfib_table.h> +#include <vnet/adj/adj_mcast.h> +#include <vnet/interface.h> +#include <vnet/udp/udp_local.h> +#include <vlib/vlib.h> + +/** + * @file + * @brief VXLAN-GPE. + * + * VXLAN-GPE 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-GPE 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-GPE segment. + */ + +vxlan_gpe_main_t vxlan_gpe_main __clib_export; + +static u8 * +format_decap_next (u8 * s, va_list * args) +{ + vxlan_gpe_tunnel_t *t = va_arg (*args, vxlan_gpe_tunnel_t *); + + switch (t->protocol) + { + case VXLAN_GPE_PROTOCOL_IP4: + s = format (s, "protocol ip4 fib-idx %d", t->decap_fib_index); + break; + case VXLAN_GPE_PROTOCOL_IP6: + s = format (s, "protocol ip6 fib-idx %d", t->decap_fib_index); + break; + case VXLAN_GPE_PROTOCOL_ETHERNET: + s = format (s, "protocol ethernet"); + break; + case VXLAN_GPE_PROTOCOL_NSH: + s = format (s, "protocol nsh"); + break; + default: + s = format (s, "protocol unknown %d", t->protocol); + } + + return s; +} + +/** + * @brief Format function for VXLAN GPE tunnel + * + * @param *s formatting string + * @param *args + * + * @return *s formatted string + * + */ +u8 * +format_vxlan_gpe_tunnel (u8 * s, va_list * args) +{ + vxlan_gpe_tunnel_t *t = va_arg (*args, vxlan_gpe_tunnel_t *); + vxlan_gpe_main_t *ngm = &vxlan_gpe_main; + + s = format (s, + "[%d] lcl %U rmt %U lcl_port %d rmt_port %d vni %d " + "fib-idx %d sw-if-idx %d ", + t - ngm->tunnels, format_ip46_address, &t->local, IP46_TYPE_ANY, + format_ip46_address, &t->remote, IP46_TYPE_ANY, t->local_port, + t->remote_port, t->vni, t->encap_fib_index, t->sw_if_index); + +#if 0 + /* next_dpo not yet used by vxlan-gpe-encap node */ + s = format (s, "encap-dpo-idx %d ", t->next_dpo.dpoi_index); + */ +#endif + s = format (s, "decap-next-%U ", format_decap_next, t); + + if (PREDICT_FALSE (ip46_address_is_multicast (&t->remote))) + s = format (s, "mcast-sw-if-idx %d ", t->mcast_sw_if_index); + + return s; +} + +/** + * @brief Naming for VXLAN GPE tunnel + * + * @param *s formatting string + * @param *args + * + * @return *s formatted string + * + */ +static u8 * +format_vxlan_gpe_name (u8 * s, va_list * args) +{ + u32 dev_instance = va_arg (*args, u32); + return format (s, "vxlan_gpe_tunnel%d", dev_instance); +} + +/** + * @brief CLI function for VXLAN GPE admin up/down + * + * @param *vnm + * @param hw_if_index + * @param flag + * + * @return *rc + * + */ +static clib_error_t * +vxlan_gpe_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 0; +} + +VNET_DEVICE_CLASS (vxlan_gpe_device_class,static) = { + .name = "VXLAN_GPE", + .format_device_name = format_vxlan_gpe_name, + .format_tx_trace = format_vxlan_gpe_encap_trace, + .admin_up_down_function = vxlan_gpe_interface_admin_up_down, +}; + + +/** + * @brief Formatting function for tracing VXLAN GPE with length + * + * @param *s + * @param *args + * + * @return *s + * + */ +static u8 * +format_vxlan_gpe_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_gpe_hw_class) = { + .name = "VXLAN_GPE", + .format_header = format_vxlan_gpe_header_with_length, + .build_rewrite = default_build_rewrite, +}; + +static void +vxlan_gpe_tunnel_restack_dpo (vxlan_gpe_tunnel_t * t) +{ + dpo_id_t dpo = DPO_INVALID; + u32 encap_index = vxlan_gpe_encap_node.index; + fib_forward_chain_type_t forw_type = ip46_address_is_ip4 (&t->remote) ? + FIB_FORW_CHAIN_TYPE_UNICAST_IP4 : FIB_FORW_CHAIN_TYPE_UNICAST_IP6; + + fib_entry_contribute_forwarding (t->fib_entry_index, forw_type, &dpo); + dpo_stack_from_node (encap_index, &t->next_dpo, &dpo); + dpo_reset (&dpo); +} + +static vxlan_gpe_tunnel_t * +vxlan_gpe_tunnel_from_fib_node (fib_node_t * node) +{ + ASSERT (FIB_NODE_TYPE_VXLAN_GPE_TUNNEL == node->fn_type); + return ((vxlan_gpe_tunnel_t *) (((char *) node) - + STRUCT_OFFSET_OF (vxlan_gpe_tunnel_t, + node))); +} + +/** + * Function definition to backwalk a FIB node - + * Here we will restack the new dpo of VXLAN_GPE DIP to encap node. + */ +static fib_node_back_walk_rc_t +vxlan_gpe_tunnel_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx) +{ + vxlan_gpe_tunnel_restack_dpo (vxlan_gpe_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_gpe_tunnel_fib_node_get (fib_node_index_t index) +{ + vxlan_gpe_tunnel_t *t; + vxlan_gpe_main_t *ngm = &vxlan_gpe_main; + + t = pool_elt_at_index (ngm->tunnels, index); + + return (&t->node); +} + +/** + * Function definition to inform the FIB node that its last lock has gone. + */ +static void +vxlan_gpe_tunnel_last_lock_gone (fib_node_t * node) +{ + /* + * The VXLAN_GPE 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_GPE tunnels + * for participation in the FIB object graph. + */ +const static fib_node_vft_t vxlan_gpe_vft = { + .fnv_get = vxlan_gpe_tunnel_fib_node_get, + .fnv_last_lock = vxlan_gpe_tunnel_last_lock_gone, + .fnv_back_walk = vxlan_gpe_tunnel_back_walk, +}; + +#define foreach_gpe_copy_field \ + _ (vni) \ + _ (protocol) \ + _ (mcast_sw_if_index) \ + _ (encap_fib_index) \ + _ (decap_fib_index) \ + _ (local_port) \ + _ (remote_port) + +#define foreach_copy_ipv4 { \ + _(local.ip4.as_u32) \ + _(remote.ip4.as_u32) \ +} + +#define foreach_copy_ipv6 { \ + _(local.ip6.as_u64[0]) \ + _(local.ip6.as_u64[1]) \ + _(remote.ip6.as_u64[0]) \ + _(remote.ip6.as_u64[1]) \ +} + + +/** + * @brief Calculate IPv4 VXLAN GPE rewrite header + * + * @param *t + * + * @return rc + * + */ +int +vxlan4_gpe_rewrite (vxlan_gpe_tunnel_t * t, u32 extension_size, + u8 protocol_override, uword encap_next_node) +{ + u8 *rw = 0; + ip4_header_t *ip0; + ip4_vxlan_gpe_header_t *h0; + int len; + + len = sizeof (*h0) + extension_size; + + vec_free (t->rewrite); + vec_validate_aligned (rw, len - 1, CLIB_CACHE_LINE_BYTES); + + h0 = (ip4_vxlan_gpe_header_t *) rw; + + /* Fixed portion of the (outer) ip4 header */ + ip0 = &h0->ip4; + ip0->ip_version_and_header_length = 0x45; + ip0->ttl = 254; + ip0->protocol = IP_PROTOCOL_UDP; + + /* we fix up the ip4 header length and checksum after-the-fact */ + ip0->src_address.as_u32 = t->local.ip4.as_u32; + ip0->dst_address.as_u32 = t->remote.ip4.as_u32; + ip0->checksum = ip4_header_checksum (ip0); + + /* UDP header, randomize src port on something, maybe? */ + h0->udp.src_port = clib_host_to_net_u16 (t->local_port); + h0->udp.dst_port = clib_host_to_net_u16 (t->remote_port); + + /* VXLAN header. Are we having fun yet? */ + h0->vxlan.flags = VXLAN_GPE_FLAGS_I | VXLAN_GPE_FLAGS_P; + h0->vxlan.ver_res = VXLAN_GPE_VERSION; + if (protocol_override) + { + h0->vxlan.protocol = protocol_override; + } + else + { + h0->vxlan.protocol = t->protocol; + } + t->rewrite_size = sizeof (ip4_vxlan_gpe_header_t) + extension_size; + h0->vxlan.vni_res = clib_host_to_net_u32 (t->vni << 8); + + t->rewrite = rw; + t->encap_next_node = encap_next_node; + return (0); +} + +/** + * @brief Calculate IPv6 VXLAN GPE rewrite header + * + * @param *t + * + * @return rc + * + */ +int +vxlan6_gpe_rewrite (vxlan_gpe_tunnel_t * t, u32 extension_size, + u8 protocol_override, uword encap_next_node) +{ + u8 *rw = 0; + ip6_header_t *ip0; + ip6_vxlan_gpe_header_t *h0; + int len; + + len = sizeof (*h0) + extension_size; + + vec_free (t->rewrite); + vec_validate_aligned (rw, len - 1, CLIB_CACHE_LINE_BYTES); + + h0 = (ip6_vxlan_gpe_header_t *) rw; + + /* Fixed portion of the (outer) ip4 header */ + ip0 = &h0->ip6; + ip0->ip_version_traffic_class_and_flow_label = + clib_host_to_net_u32 (6 << 28); + ip0->hop_limit = 255; + ip0->protocol = IP_PROTOCOL_UDP; + + ip0->src_address.as_u64[0] = t->local.ip6.as_u64[0]; + ip0->src_address.as_u64[1] = t->local.ip6.as_u64[1]; + ip0->dst_address.as_u64[0] = t->remote.ip6.as_u64[0]; + ip0->dst_address.as_u64[1] = t->remote.ip6.as_u64[1]; + + /* UDP header, randomize src port on something, maybe? */ + h0->udp.src_port = clib_host_to_net_u16 (t->local_port); + h0->udp.dst_port = clib_host_to_net_u16 (t->remote_port); + + /* VXLAN header. Are we having fun yet? */ + h0->vxlan.flags = VXLAN_GPE_FLAGS_I | VXLAN_GPE_FLAGS_P; + h0->vxlan.ver_res = VXLAN_GPE_VERSION; + if (protocol_override) + { + h0->vxlan.protocol = t->protocol; + } + else + { + h0->vxlan.protocol = protocol_override; + } + t->rewrite_size = sizeof (ip4_vxlan_gpe_header_t) + extension_size; + h0->vxlan.vni_res = clib_host_to_net_u32 (t->vni << 8); + + t->rewrite = rw; + t->encap_next_node = encap_next_node; + 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_gpe_main.mcast_shared, ip); + ALWAYS_ASSERT (p); + return (mcast_shared_t) + { + .as_u64 = *p}; +} + +static inline void +mcast_shared_add (ip46_address_t * remote, + fib_node_index_t mfei, adj_index_t ai) +{ + mcast_shared_t new_ep = { + .mcast_adj_index = ai, + .mfib_entry_index = mfei, + }; + + hash_set_mem_alloc (&vxlan_gpe_main.mcast_shared, remote, new_ep.as_u64); +} + +static inline void +mcast_shared_remove (ip46_address_t * remote) +{ + mcast_shared_t ep = mcast_shared_get (remote); + + adj_unlock (ep.mcast_adj_index); + mfib_table_entry_delete_index (ep.mfib_entry_index, MFIB_SOURCE_VXLAN_GPE); + + hash_unset_mem_free (&vxlan_gpe_main.mcast_shared, remote); +} + +/** + * @brief Add or Del a VXLAN GPE tunnel + * + * @param *a + * @param *sw_if_index + * + * @return rc + * + */ +int vnet_vxlan_gpe_add_del_tunnel + (vnet_vxlan_gpe_add_del_tunnel_args_t * a, u32 * sw_if_indexp) +{ + vxlan_gpe_main_t *ngm = &vxlan_gpe_main; + vxlan_gpe_tunnel_t *t = 0; + vnet_main_t *vnm = ngm->vnet_main; + vnet_hw_interface_t *hi; + uword *p; + u32 hw_if_index = ~0; + u32 sw_if_index = ~0; + int rv; + vxlan4_gpe_tunnel_key_t key4, *key4_copy; + vxlan6_gpe_tunnel_key_t key6, *key6_copy; + u32 is_ip6 = a->is_ip6; + + /* Set udp-ports */ + if (a->local_port == 0) + a->local_port = is_ip6 ? UDP_DST_PORT_VXLAN6_GPE : UDP_DST_PORT_VXLAN_GPE; + + if (a->remote_port == 0) + a->remote_port = is_ip6 ? UDP_DST_PORT_VXLAN6_GPE : UDP_DST_PORT_VXLAN_GPE; + + if (!is_ip6) + { + key4.local = a->local.ip4.as_u32; + key4.remote = a->remote.ip4.as_u32; + key4.vni = clib_host_to_net_u32 (a->vni << 8); + key4.port = (u32) clib_host_to_net_u16 (a->local_port); + + p = hash_get_mem (ngm->vxlan4_gpe_tunnel_by_key, &key4); + } + else + { + key6.local.as_u64[0] = a->local.ip6.as_u64[0]; + key6.local.as_u64[1] = a->local.ip6.as_u64[1]; + key6.remote.as_u64[0] = a->remote.ip6.as_u64[0]; + key6.remote.as_u64[1] = a->remote.ip6.as_u64[1]; + key6.vni = clib_host_to_net_u32 (a->vni << 8); + key6.port = (u32) clib_host_to_net_u16 (a->local_port); + + p = hash_get_mem (ngm->vxlan6_gpe_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; + + pool_get_aligned (ngm->tunnels, t, CLIB_CACHE_LINE_BYTES); + clib_memset (t, 0, sizeof (*t)); + + /* copy from arg structure */ +#define _(x) t->x = a->x; + foreach_gpe_copy_field; + if (!a->is_ip6) + foreach_copy_ipv4 + else + foreach_copy_ipv6 +#undef _ + + if (!a->is_ip6) + t->flags |= VXLAN_GPE_TUNNEL_IS_IPV4; + + if (!a->is_ip6) + { + rv = vxlan4_gpe_rewrite (t, 0, 0, VXLAN_GPE_ENCAP_NEXT_IP4_LOOKUP); + } + else + { + rv = vxlan6_gpe_rewrite (t, 0, 0, VXLAN_GPE_ENCAP_NEXT_IP6_LOOKUP); + } + + if (rv) + { + pool_put (ngm->tunnels, t); + return rv; + } + + if (!is_ip6) + { + key4_copy = clib_mem_alloc (sizeof (*key4_copy)); + clib_memcpy_fast (key4_copy, &key4, sizeof (*key4_copy)); + hash_set_mem (ngm->vxlan4_gpe_tunnel_by_key, key4_copy, + t - ngm->tunnels); + } + else + { + key6_copy = clib_mem_alloc (sizeof (*key6_copy)); + clib_memcpy_fast (key6_copy, &key6, sizeof (*key6_copy)); + hash_set_mem (ngm->vxlan6_gpe_tunnel_by_key, key6_copy, + t - ngm->tunnels); + } + + if (vec_len (ngm->free_vxlan_gpe_tunnel_hw_if_indices) > 0) + { + vnet_interface_main_t *im = &vnm->interface_main; + hw_if_index = ngm->free_vxlan_gpe_tunnel_hw_if_indices + [vec_len (ngm->free_vxlan_gpe_tunnel_hw_if_indices) - 1]; + vec_dec_len (ngm->free_vxlan_gpe_tunnel_hw_if_indices, 1); + + hi = vnet_get_hw_interface (vnm, hw_if_index); + hi->dev_instance = t - ngm->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_gpe_device_class.index, t - ngm->tunnels, + vxlan_gpe_hw_class.index, t - ngm->tunnels); + hi = vnet_get_hw_interface (vnm, hw_if_index); + } + + /* Set vxlan-gpe tunnel output node */ + u32 encap_index = vxlan_gpe_encap_node.index; + vnet_set_interface_output_node (vnm, hw_if_index, encap_index); + + t->hw_if_index = hw_if_index; + t->sw_if_index = sw_if_index = hi->sw_if_index; + vec_validate_init_empty (ngm->tunnel_index_by_sw_if_index, sw_if_index, + ~0); + ngm->tunnel_index_by_sw_if_index[sw_if_index] = t - ngm->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, hi->sw_if_index, + VNET_SW_INTERFACE_FLAG_ADMIN_UP); + fib_node_init (&t->node, FIB_NODE_TYPE_VXLAN_GPE_TUNNEL); + fib_prefix_t tun_remote_pfx; + vnet_flood_class_t flood_class = VNET_FLOOD_CLASS_TUNNEL_NORMAL; + + fib_protocol_t fp = fib_ip_proto (is_ip6); + fib_prefix_from_ip46_addr (fp, &t->remote, &tun_remote_pfx); + if (!ip46_address_is_multicast (&t->remote)) + { + /* Unicast tunnel - + * source the FIB entry for the tunnel's destination + * and become a child thereof. The tunnel will then get poked + * when the forwarding for the entry updates, and the tunnel can + * re-stack accordingly + */ + vtep_addr_ref (&ngm->vtep_table, t->encap_fib_index, &t->local); + t->fib_entry_index = fib_entry_track (t->encap_fib_index, + &tun_remote_pfx, + FIB_NODE_TYPE_VXLAN_GPE_TUNNEL, + t - ngm->tunnels, + &t->sibling_index); + vxlan_gpe_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 + */ + if (vtep_addr_ref (&ngm->vtep_table, + t->encap_fib_index, &t->remote) == 1) + { + fib_node_index_t mfei; + adj_index_t ai; + fib_route_path_t path = { + .frp_proto = fib_proto_to_dpo (fp), + .frp_addr = zero_addr, + .frp_sw_if_index = 0xffffffff, + .frp_fib_index = ~0, + .frp_weight = 1, + .frp_flags = FIB_ROUTE_PATH_LOCAL, + .frp_mitf_flags = MFIB_ITF_FLAG_FORWARD, + }; + const mfib_prefix_t mpfx = { + .fp_proto = fp, + .fp_len = (is_ip6 ? 128 : 32), + .fp_grp_addr = tun_remote_pfx.fp_addr, + }; + + /* + * Setup the (*,G) to receive traffic on the mcast group + * - the forwarding interface is for-us + * - the accepting interface is that from the API + */ + mfib_table_entry_path_update (t->encap_fib_index, &mpfx, + MFIB_SOURCE_VXLAN_GPE, + MFIB_ENTRY_FLAG_NONE, &path); + + path.frp_sw_if_index = a->mcast_sw_if_index; + path.frp_flags = FIB_ROUTE_PATH_FLAG_NONE; + path.frp_mitf_flags = MFIB_ITF_FLAG_ACCEPT; + mfei = mfib_table_entry_path_update ( + t->encap_fib_index, &mpfx, MFIB_SOURCE_VXLAN_GPE, + MFIB_ENTRY_FLAG_NONE, &path); + + /* + * Create the mcast adjacency to send traffic to the group + */ + ai = adj_mcast_add_or_lock (fp, + fib_proto_to_link (fp), + a->mcast_sw_if_index); + + /* + * create a new end-point + */ + mcast_shared_add (&t->remote, mfei, ai); + } + + dpo_id_t dpo = DPO_INVALID; + mcast_shared_t ep = mcast_shared_get (&t->remote); + + /* Stack shared mcast remote mac addr rewrite on encap */ + dpo_set (&dpo, DPO_ADJACENCY_MCAST, + fib_proto_to_dpo (fp), ep.mcast_adj_index); + + dpo_stack_from_node (encap_index, &t->next_dpo, &dpo); + dpo_reset (&dpo); + flood_class = VNET_FLOOD_CLASS_TUNNEL_MASTER; + } + + vnet_get_sw_interface (vnet_get_main (), sw_if_index)->flood_class = + flood_class; + } + else + { + /* deleting a tunnel: tunnel must exist */ + if (!p) + return VNET_API_ERROR_NO_SUCH_ENTRY; + + t = pool_elt_at_index (ngm->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; + set_int_l2_mode (ngm->vlib_main, vnm, MODE_L3, t->sw_if_index, 0, + L2_BD_PORT_TYPE_NORMAL, 0, 0); + vec_add1 (ngm->free_vxlan_gpe_tunnel_hw_if_indices, t->hw_if_index); + + ngm->tunnel_index_by_sw_if_index[t->sw_if_index] = ~0; + + if (!is_ip6) + hash_unset (ngm->vxlan4_gpe_tunnel_by_key, key4.as_u64); + else + hash_unset_mem_free (&ngm->vxlan6_gpe_tunnel_by_key, &key6); + + if (!ip46_address_is_multicast (&t->remote)) + { + vtep_addr_unref (&ngm->vtep_table, t->encap_fib_index, &t->local); + fib_entry_untrack (t->fib_entry_index, t->sibling_index); + } + else if (vtep_addr_unref (&ngm->vtep_table, + t->encap_fib_index, &t->remote) == 0) + { + mcast_shared_remove (&t->remote); + } + + fib_node_deinit (&t->node); + vec_free (t->rewrite); + pool_put (ngm->tunnels, t); + } + + if (sw_if_indexp) + *sw_if_indexp = sw_if_index; + + if (a->is_add) + { + /* register udp ports */ + if (!is_ip6 && !udp_is_valid_dst_port (a->local_port, 1)) + udp_register_dst_port (ngm->vlib_main, a->local_port, + vxlan4_gpe_input_node.index, 1 /* is_ip4 */); + if (is_ip6 && !udp_is_valid_dst_port (a->remote_port, 0)) + udp_register_dst_port (ngm->vlib_main, a->remote_port, + vxlan6_gpe_input_node.index, 0 /* is_ip4 */); + } + + return 0; +} + +static clib_error_t * +vxlan_gpe_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; + u8 is_add = 1; + ip46_address_t local, remote; + u8 local_set = 0; + u8 remote_set = 0; + u8 grp_set = 0; + u8 ipv4_set = 0; + u8 ipv6_set = 0; + u32 mcast_sw_if_index = ~0; + u32 encap_fib_index = 0; + u32 decap_fib_index = 0; + u8 protocol = VXLAN_GPE_PROTOCOL_IP4; + u32 vni; + u8 vni_set = 0; + u32 local_port = 0; + u32 remote_port = 0; + int rv; + u32 tmp; + vnet_vxlan_gpe_add_del_tunnel_args_t _a, *a = &_a; + u32 sw_if_index; + clib_error_t *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, "local %U", + unformat_ip4_address, &local.ip4)) + { + local_set = 1; + ipv4_set = 1; + } + else if (unformat (line_input, "remote %U", + unformat_ip4_address, &remote.ip4)) + { + remote_set = 1; + ipv4_set = 1; + } + else if (unformat (line_input, "local %U", + unformat_ip6_address, &local.ip6)) + { + local_set = 1; + ipv6_set = 1; + } + else if (unformat (line_input, "remote %U", + unformat_ip6_address, &remote.ip6)) + { + remote_set = 1; + ipv6_set = 1; + } + else if (unformat (line_input, "group %U %U", + unformat_ip4_address, &remote.ip4, + unformat_vnet_sw_interface, + vnet_get_main (), &mcast_sw_if_index)) + { + grp_set = remote_set = 1; + ipv4_set = 1; + } + else if (unformat (line_input, "group %U %U", + unformat_ip6_address, &remote.ip6, + unformat_vnet_sw_interface, + vnet_get_main (), &mcast_sw_if_index)) + { + grp_set = remote_set = 1; + ipv6_set = 1; + } + else if (unformat (line_input, "encap-vrf-id %d", &tmp)) + { + if (ipv6_set) + encap_fib_index = fib_table_find (FIB_PROTOCOL_IP6, tmp); + else + encap_fib_index = fib_table_find (FIB_PROTOCOL_IP4, tmp); + + if (encap_fib_index == ~0) + { + error = + clib_error_return (0, "nonexistent encap fib id %d", tmp); + goto done; + } + } + else if (unformat (line_input, "decap-vrf-id %d", &tmp)) + { + if (ipv6_set) + decap_fib_index = fib_table_find (FIB_PROTOCOL_IP6, tmp); + else + decap_fib_index = fib_table_find (FIB_PROTOCOL_IP4, tmp); + + if (decap_fib_index == ~0) + { + error = + clib_error_return (0, "nonexistent decap fib id %d", tmp); + goto done; + } + } + else if (unformat (line_input, "vni %d", &vni)) + vni_set = 1; + else if (unformat (line_input, "local_port %d", &local_port)) + ; + else if (unformat (line_input, "remote_port %d", &remote_port)) + ; + else if (unformat (line_input, "next-ip4")) + protocol = VXLAN_GPE_PROTOCOL_IP4; + else if (unformat (line_input, "next-ip6")) + protocol = VXLAN_GPE_PROTOCOL_IP6; + else if (unformat (line_input, "next-ethernet")) + protocol = VXLAN_GPE_PROTOCOL_ETHERNET; + else if (unformat (line_input, "next-nsh")) + protocol = VXLAN_GPE_PROTOCOL_NSH; + else + { + error = clib_error_return (0, "parse error: '%U'", + format_unformat_error, line_input); + goto done; + } + } + + if (local_set == 0) + { + error = clib_error_return (0, "tunnel local address not specified"); + goto done; + } + + if (remote_set == 0) + { + error = clib_error_return (0, "tunnel remote address not specified"); + goto done; + } + + if (grp_set && !ip46_address_is_multicast (&remote)) + { + error = clib_error_return (0, "tunnel group address not multicast"); + goto done; + } + + if (grp_set == 0 && ip46_address_is_multicast (&remote)) + { + error = clib_error_return (0, "remote address must be unicast"); + goto done; + } + + if (grp_set && mcast_sw_if_index == ~0) + { + error = clib_error_return (0, "tunnel nonexistent multicast device"); + goto done; + } + if (ipv4_set && ipv6_set) + { + error = clib_error_return (0, "both IPv4 and IPv6 addresses specified"); + goto done; + } + + if ((ipv4_set && memcmp (&local.ip4, &remote.ip4, sizeof (local.ip4)) == 0) + || (ipv6_set + && memcmp (&local.ip6, &remote.ip6, sizeof (local.ip6)) == 0)) + { + error = clib_error_return (0, "src and remote addresses are identical"); + goto done; + } + + if (vni_set == 0) + { + error = clib_error_return (0, "vni not specified"); + goto done; + } + + clib_memset (a, 0, sizeof (*a)); + + a->is_add = is_add; + a->is_ip6 = ipv6_set; + +#define _(x) a->x = x; + foreach_gpe_copy_field; + if (ipv4_set) + foreach_copy_ipv4 + else + foreach_copy_ipv6 +#undef _ + + rv = vnet_vxlan_gpe_add_del_tunnel (a, &sw_if_index); + + switch (rv) + { + case 0: + vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, + vnet_get_main (), sw_if_index); + break; + case VNET_API_ERROR_INVALID_DECAP_NEXT: + error = clib_error_return (0, "invalid decap-next..."); + goto done; + + 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_gpe_add_del_tunnel returned %d", rv); + goto done; + } + +done: + unformat_free (line_input); + + return error; +} + +/*? + * Add or delete a VXLAN-GPE Tunnel. + * + * VXLAN-GPE 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-GPE 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-GPE segment. + * + * @cliexpar + * Example of how to create a VXLAN-GPE Tunnel: + * @cliexcmd{create vxlan-gpe tunnel local 10.0.3.1 remote 10.0.3.3 vni 13 encap-vrf-id 7} + * Example of how to delete a VXLAN-GPE Tunnel: + * @cliexcmd{create vxlan-gpe tunnel local 10.0.3.1 remote 10.0.3.3 vni 13 del} + ?*/ +VLIB_CLI_COMMAND (create_vxlan_gpe_tunnel_command, static) = { + .path = "create vxlan-gpe tunnel", + .short_help = + "create vxlan-gpe tunnel local <local-addr> " + " {remote <remote-addr>|group <mcast-addr> <intf-name>}" + " vni <nn> [next-ip4][next-ip6][next-ethernet][next-nsh]" + " [encap-vrf-id <nn>] [decap-vrf-id <nn>] [del]\n", + .function = vxlan_gpe_add_del_tunnel_command_fn, +}; + +/** + * @brief CLI function for showing VXLAN GPE tunnels + * + * @param *vm + * @param *input + * @param *cmd + * + * @return error + * + */ +static clib_error_t * +show_vxlan_gpe_tunnel_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + vxlan_gpe_main_t *ngm = &vxlan_gpe_main; + vxlan_gpe_tunnel_t *t; + + if (pool_elts (ngm->tunnels) == 0) + vlib_cli_output (vm, "No vxlan-gpe tunnels configured."); + + pool_foreach (t, ngm->tunnels) + { + vlib_cli_output (vm, "%U", format_vxlan_gpe_tunnel, t); + } + + return 0; +} + +/*? + * Display all the VXLAN-GPE Tunnel entries. + * + * @cliexpar + * Example of how to display the VXLAN-GPE Tunnel entries: + * @cliexstart{show vxlan-gpe tunnel} + * [0] local 10.0.3.1 remote 10.0.3.3 vni 13 encap_fib_index 0 sw_if_index 5 decap_next l2 + * @cliexend + ?*/ +VLIB_CLI_COMMAND (show_vxlan_gpe_tunnel_command, static) = { + .path = "show vxlan-gpe", + .function = show_vxlan_gpe_tunnel_command_fn, +}; + +void +vnet_int_vxlan_gpe_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable) +{ + if (is_ip6) + vnet_feature_enable_disable ("ip6-unicast", "ip6-vxlan-gpe-bypass", + sw_if_index, is_enable, 0, 0); + else + vnet_feature_enable_disable ("ip4-unicast", "ip4-vxlan-gpe-bypass", + sw_if_index, is_enable, 0, 0); +} + + +static clib_error_t * +set_ip_vxlan_gpe_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_gpe_bypass_mode (sw_if_index, is_ip6, is_enable); + +done: + unformat_free (line_input); + + return error; +} + +static clib_error_t * +set_ip4_vxlan_gpe_bypass (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + return set_ip_vxlan_gpe_bypass (0, input, cmd); +} + +/*? + * This command adds the 'ip4-vxlan-gpe-bypass' graph node for a given + * interface. By adding the IPv4 vxlan-gpe-bypass graph node to an interface, + * the node checks for and validate input vxlan_gpe packet and bypass + * ip4-lookup, ip4-local, ip4-udp-lookup nodes to speedup vxlan_gpe packet + * forwarding. This node will cause extra overhead to for non-vxlan_gpe + * packets which is kept at a minimum. + * + * @cliexpar + * @parblock + * Example of graph node before ip4-vxlan-gpe-bypass is enabled: + * @cliexstart{show vlib graph ip4-vxlan-gpe-bypass} + * Name Next Previous + * ip4-vxlan-gpe-bypass error-drop [0] + * vxlan4-gpe-input [1] + * ip4-lookup [2] + * @cliexend + * + * Example of how to enable ip4-vxlan-gpe-bypass on an interface: + * @cliexcmd{set interface ip vxlan-gpe-bypass GigabitEthernet2/0/0} + * + * Example of graph node after ip4-vxlan-gpe-bypass is enabled: + * @cliexstart{show vlib graph ip4-vxlan-gpe-bypass} + * Name Next Previous + * ip4-vxlan-gpe-bypass error-drop [0] ip4-input + * vxlan4-gpe-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-gpe-bypass + * ip4-lookup + * ... + * @cliexend + * + * Example of how to disable ip4-vxlan-gpe-bypass on an interface: + * @cliexcmd{set interface ip vxlan-gpe-bypass GigabitEthernet2/0/0 del} + * @endparblock +?*/ +VLIB_CLI_COMMAND (set_interface_ip_vxlan_gpe_bypass_command, static) = { + .path = "set interface ip vxlan-gpe-bypass", + .function = set_ip4_vxlan_gpe_bypass, + .short_help = "set interface ip vxlan-gpe-bypass <interface> [del]", +}; + +static clib_error_t * +set_ip6_vxlan_gpe_bypass (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + return set_ip_vxlan_gpe_bypass (1, input, cmd); +} + +/*? + * This command adds the 'ip6-vxlan-gpe-bypass' graph node for a given + * interface. By adding the IPv6 vxlan-gpe-bypass graph node to an interface, + * the node checks for and validate input vxlan_gpe packet and bypass + * ip6-lookup, ip6-local, ip6-udp-lookup nodes to speedup vxlan_gpe packet + * forwarding. This node will cause extra overhead to for non-vxlan_gpe packets + * which is kept at a minimum. + * + * @cliexpar + * @parblock + * Example of graph node before ip6-vxlan-gpe-bypass is enabled: + * @cliexstart{show vlib graph ip6-vxlan-gpe-bypass} + * Name Next Previous + * ip6-vxlan-gpe-bypass error-drop [0] + * vxlan6-gpe-input [1] + * ip6-lookup [2] + * @cliexend + * + * Example of how to enable ip6-vxlan-gpe-bypass on an interface: + * @cliexcmd{set interface ip6 vxlan-gpe-bypass GigabitEthernet2/0/0} + * + * Example of graph node after ip6-vxlan-gpe-bypass is enabled: + * @cliexstart{show vlib graph ip6-vxlan-gpe-bypass} + * Name Next Previous + * ip6-vxlan-gpe-bypass error-drop [0] ip6-input + * vxlan6-gpe-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-gpe-bypass + * ip6-lookup + * ... + * @cliexend + * + * Example of how to disable ip6-vxlan-gpe-bypass on an interface: + * @cliexcmd{set interface ip6 vxlan-gpe-bypass GigabitEthernet2/0/0 del} + * @endparblock +?*/ +VLIB_CLI_COMMAND (set_interface_ip6_vxlan_gpe_bypass_command, static) = { + .path = "set interface ip6 vxlan-gpe-bypass", + .function = set_ip6_vxlan_gpe_bypass, + .short_help = "set interface ip6 vxlan-gpe-bypass <interface> [del]", +}; + +VNET_FEATURE_INIT (ip4_vxlan_gpe_bypass, static) = +{ + .arc_name = "ip4-unicast", + .node_name = "ip4-vxlan-gpe-bypass", + .runs_before = VNET_FEATURES ("ip4-lookup"), +}; + +VNET_FEATURE_INIT (ip6_vxlan_gpe_bypass, static) = +{ + .arc_name = "ip6-unicast", + .node_name = "ip6-vxlan-gpe-bypass", + .runs_before = VNET_FEATURES ("ip6-lookup"), +}; + +/** + * @brief Feature init function for VXLAN GPE + * + * @param *vm + * + * @return error + * + */ +__clib_export clib_error_t * +vxlan_gpe_init (vlib_main_t *vm) +{ + vxlan_gpe_main_t *ngm = &vxlan_gpe_main; + + ngm->register_decap_protocol = vxlan_gpe_register_decap_protocol; + ngm->unregister_decap_protocol = vxlan_gpe_unregister_decap_protocol; + ngm->vnet_main = vnet_get_main (); + ngm->vlib_main = vm; + + ngm->vxlan4_gpe_tunnel_by_key + = hash_create_mem (0, sizeof (vxlan4_gpe_tunnel_key_t), sizeof (uword)); + + ngm->vxlan6_gpe_tunnel_by_key + = hash_create_mem (0, sizeof (vxlan6_gpe_tunnel_key_t), sizeof (uword)); + + + ngm->mcast_shared = hash_create_mem (0, + sizeof (ip46_address_t), + sizeof (mcast_shared_t)); + ngm->vtep_table = vtep_table_create (); + + /* Register the list of standard decap protocols supported */ + vxlan_gpe_register_decap_protocol (VXLAN_GPE_PROTOCOL_IP4, + VXLAN_GPE_INPUT_NEXT_IP4_INPUT); + vxlan_gpe_register_decap_protocol (VXLAN_GPE_PROTOCOL_IP6, + VXLAN_GPE_INPUT_NEXT_IP6_INPUT); + vxlan_gpe_register_decap_protocol (VXLAN_GPE_PROTOCOL_ETHERNET, + VXLAN_GPE_INPUT_NEXT_L2_INPUT); + + fib_node_register_type (FIB_NODE_TYPE_VXLAN_GPE_TUNNEL, &vxlan_gpe_vft); + + return 0; +} + +VLIB_INIT_FUNCTION (vxlan_gpe_init); + + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |