--- /dev/null
+/*
+ * 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/ip/punt.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/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.
+ */
+static vlib_punt_hdl_t punt_hdl;
+
+vxlan_gbp_main_t vxlan_gbp_main;
+
+u8 *
+format_vxlan_gbp_tunnel_mode (u8 * s, va_list * args)
+{
+ vxlan_gbp_tunnel_mode_t mode = va_arg (*args, vxlan_gbp_tunnel_mode_t);
+
+ switch (mode)
+ {
+ case VXLAN_GBP_TUNNEL_MODE_L2:
+ s = format (s, "L2");
+ break;
+ case VXLAN_GBP_TUNNEL_MODE_L3:
+ s = format (s, "L3");
+ break;
+ }
+ 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 mode %U ",
+ 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,
+ format_vxlan_gbp_tunnel_mode, t->mode);
+
+ s = format (s, "encap-dpo-idx %d ", t->next_dpo.dpoi_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) \
+_(mode) \
+_(mcast_sw_if_index) \
+_(encap_fib_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 */
+
+ clib_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 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);
+ ALWAYS_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);
+ ALWAYS_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);
+}
+
+inline void
+vxlan_gbp_register_udp_ports (void)
+{
+ vxlan_gbp_main_t *vxm = &vxlan_gbp_main;
+
+ if (vxm->udp_ports_registered == 0)
+ {
+ udp_register_dst_port (vxm->vlib_main, UDP_DST_PORT_vxlan_gbp,
+ vxlan4_gbp_input_node.index, /* is_ip4 */ 1);
+ udp_register_dst_port (vxm->vlib_main, UDP_DST_PORT_vxlan6_gbp,
+ vxlan6_gbp_input_node.index, /* is_ip4 */ 0);
+ }
+ /*
+ * Counts the number of vxlan_gbp tunnels
+ */
+ vxm->udp_ports_registered += 1;
+}
+
+inline void
+vxlan_gbp_unregister_udp_ports (void)
+{
+ vxlan_gbp_main_t *vxm = &vxlan_gbp_main;
+
+ ASSERT (vxm->udp_ports_registered != 0);
+
+ if (vxm->udp_ports_registered == 1)
+ {
+ udp_unregister_dst_port (vxm->vlib_main, UDP_DST_PORT_vxlan_gbp,
+ /* is_ip4 */ 1);
+ udp_unregister_dst_port (vxm->vlib_main, UDP_DST_PORT_vxlan6_gbp,
+ /* is_ip4 */ 0);
+ }
+
+ vxm->udp_ports_registered -= 1;
+}
+
+int vnet_vxlan_gbp_tunnel_add_del
+ (vnet_vxlan_gbp_tunnel_add_del_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] = ip46_address_is_multicast (&a->dst) ?
+ a->dst.ip4.as_u32 :
+ a->dst.ip4.as_u32 | (((u64) a->src.ip4.as_u32) << 32);
+ key4.key[1] = (((u64) a->encap_fib_index) << 32)
+ | clib_host_to_net_u32 (a->vni << 8);
+ not_found =
+ clib_bihash_search_inline_16_8 (&vxm->vxlan4_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)
+ {
+ t = pool_elt_at_index (vxm->tunnels, *p);
+ *sw_if_indexp = t->sw_if_index;
+ return VNET_API_ERROR_TUNNEL_EXIST;
+ }
+ pool_get_aligned (vxm->tunnels, t, CLIB_CACHE_LINE_BYTES);
+ clib_memset (t, 0, sizeof (*t));
+ dev_instance = t - vxm->tunnels;
+
+ /* copy from arg structure */
+#define _(x) t->x = a->x;
+ foreach_copy_field;
+#undef _
+
+ vxlan_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;
+ }
+
+ vxlan_gbp_register_udp_ports ();
+
+ 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;
+
+ if (VXLAN_GBP_TUNNEL_MODE_L3 == t->mode)
+ {
+ ip4_sw_interface_enable_disable (t->sw_if_index, 1);
+ ip6_sw_interface_enable_disable (t->sw_if_index, 1);
+ }
+
+ 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_entry_track (t->encap_fib_index,
+ &tun_dst_pfx,
+ FIB_NODE_TYPE_VXLAN_GBP_TUNNEL,
+ dev_instance,
+ &t->sibling_index);
+ vxlan_gbp_tunnel_restack_dpo (t);
+ }
+ else
+ {
+ /* Multicast tunnel -
+ * as the same mcast group can be used for multiple mcast tunnels
+ * with different VNIs, create the output fib adjacency only if
+ * it does not already exist
+ */
+ fib_protocol_t fp = fib_ip_proto (is_ip6);
+
+ if (vtep_addr_ref (&t->dst) == 1)
+ {
+ fib_node_index_t mfei;
+ adj_index_t ai;
+ fib_route_path_t path = {
+ .frp_proto = fib_proto_to_dpo (fp),
+ .frp_addr = zero_addr,
+ .frp_sw_if_index = 0xffffffff,
+ .frp_fib_index = ~0,
+ .frp_weight = 0,
+ .frp_flags = FIB_ROUTE_PATH_LOCAL,
+ .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_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,
+ 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_GBP,
+ 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->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 */ );
+
+ if (VXLAN_GBP_TUNNEL_MODE_L3 == t->mode)
+ {
+ ip4_sw_interface_enable_disable (t->sw_if_index, 0);
+ ip6_sw_interface_enable_disable (t->sw_if_index, 0);
+ }
+
+ 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_untrack (t->fib_entry_index, t->sibling_index);
+ }
+ else if (vtep_addr_unref (&t->dst) == 0)
+ {
+ mcast_shared_remove (&t->dst);
+ }
+
+ vxlan_gbp_unregister_udp_ports ();
+ 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;
+}
+
+int
+vnet_vxlan_gbp_tunnel_del (u32 sw_if_index)
+{
+ vxlan_gbp_main_t *vxm = &vxlan_gbp_main;
+ vxlan_gbp_tunnel_t *t = 0;
+ u32 ti;
+
+ if (sw_if_index >= vec_len (vxm->tunnel_index_by_sw_if_index))
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+
+ ti = vxm->tunnel_index_by_sw_if_index[sw_if_index];
+ if (~0 != ti)
+ {
+ t = pool_elt_at_index (vxm->tunnels, ti);
+
+ vnet_vxlan_gbp_tunnel_add_del_args_t args = {
+ .is_add = 0,
+ .is_ip6 = !ip46_address_is_ip4 (&t->src),
+ .vni = t->vni,
+ .src = t->src,
+ .dst = t->dst,
+ .instance = ~0,
+ };
+
+ return (vnet_vxlan_gbp_tunnel_add_del (&args, NULL));
+ }
+
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+}
+
+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_tunnel_add_del_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;
+ vxlan_gbp_tunnel_mode_t mode = VXLAN_GBP_TUNNEL_MODE_L2;
+ 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_tunnel_add_del_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_tunnel_add_del (&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_tunnel_add_del 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 GigabitEthernet0/8/0 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_tunnel_add_del_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 enabled 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 enabled 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 ip6 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));
+
+ fib_node_register_type (FIB_NODE_TYPE_VXLAN_GBP_TUNNEL, &vxlan_gbp_vft);
+
+ punt_hdl = vlib_punt_client_register ("vxlan-gbp");
+
+ vlib_punt_reason_alloc (punt_hdl, "VXLAN-GBP-no-such-v4-tunnel", NULL, NULL,
+ &vxm->punt_no_such_tunnel[FIB_PROTOCOL_IP4],
+ VNET_PUNT_REASON_F_IP4_PACKET,
+ format_vnet_punt_reason_flags);
+ vlib_punt_reason_alloc (punt_hdl, "VXLAN-GBP-no-such-v6-tunnel", NULL, NULL,
+ &vxm->punt_no_such_tunnel[FIB_PROTOCOL_IP6],
+ VNET_PUNT_REASON_F_IP6_PACKET,
+ format_vnet_punt_reason_flags);
+
+ return (0);
+}
+
+/* *INDENT-OFF* */
+VLIB_INIT_FUNCTION (vxlan_gbp_init) =
+{
+ .runs_after = VLIB_INITS("punt_init"),
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff