--- /dev/null
+/*
+ * Copyright (c) 2017 SUSE LLC.
+ * 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/geneve/geneve.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 GENEVE.
+ *
+ * GENEVE 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 GENEVE 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 GENEVE
+ * (Virtual eXtensible VLAN) segment.
+ */
+
+
+geneve_main_t geneve_main;
+
+static u8 *
+format_decap_next (u8 * s, va_list * args)
+{
+ u32 next_index = va_arg (*args, u32);
+
+ switch (next_index)
+ {
+ case GENEVE_INPUT_NEXT_DROP:
+ return format (s, "drop");
+ case GENEVE_INPUT_NEXT_L2_INPUT:
+ return format (s, "l2");
+ default:
+ return format (s, "index %d", next_index);
+ }
+ return s;
+}
+
+u8 *
+format_geneve_tunnel (u8 * s, va_list * args)
+{
+ geneve_tunnel_t *t = va_arg (*args, geneve_tunnel_t *);
+ geneve_main_t *ngm = &geneve_main;
+
+ s = format (s, "[%d] local %U remote %U vni %d sw_if_index %d ",
+ t - ngm->tunnels,
+ format_ip46_address, &t->local, IP46_TYPE_ANY,
+ format_ip46_address, &t->remote, IP46_TYPE_ANY,
+ t->vni, t->sw_if_index);
+
+ if (ip46_address_is_multicast (&t->remote))
+ 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_geneve_name (u8 * s, va_list * args)
+{
+ u32 dev_instance = va_arg (*args, u32);
+ return format (s, "geneve_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 *
+geneve_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 (geneve_device_class, static) = {
+ .name = "GENEVE",
+ .format_device_name = format_geneve_name,
+ .format_tx_trace = format_geneve_encap_trace,
+ .tx_function = dummy_interface_tx,
+ .admin_up_down_function = geneve_interface_admin_up_down,
+};
+/* *INDENT-ON* */
+
+static u8 *
+format_geneve_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 (geneve_hw_class) = {
+ .name = "GENEVE",
+ .format_header = format_geneve_header_with_length,
+ .build_rewrite = default_build_rewrite,
+};
+/* *INDENT-ON* */
+
+static void
+geneve_tunnel_restack_dpo (geneve_tunnel_t * t)
+{
+ dpo_id_t dpo = DPO_INVALID;
+ u32 encap_index = ip46_address_is_ip4 (&t->remote) ?
+ geneve4_encap_node.index : geneve6_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 geneve_tunnel_t *
+geneve_tunnel_from_fib_node (fib_node_t * node)
+{
+#if (CLIB_DEBUG > 0)
+ ASSERT (FIB_NODE_TYPE_GENEVE_TUNNEL == node->fn_type);
+#endif
+ return ((geneve_tunnel_t *) (((char *) node) -
+ STRUCT_OFFSET_OF (geneve_tunnel_t, node)));
+}
+
+/**
+ * Function definition to backwalk a FIB node -
+ * Here we will restack the new dpo of GENEVE DIP to encap node.
+ */
+static fib_node_back_walk_rc_t
+geneve_tunnel_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx)
+{
+ geneve_tunnel_restack_dpo (geneve_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 *
+geneve_tunnel_fib_node_get (fib_node_index_t index)
+{
+ geneve_tunnel_t *t;
+ geneve_main_t *vxm = &geneve_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
+geneve_tunnel_last_lock_gone (fib_node_t * node)
+{
+ /*
+ * The GENEVE 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 GENEVE tunnels
+ * for participation in the FIB object graph.
+ */
+const static fib_node_vft_t geneve_vft = {
+ .fnv_get = geneve_tunnel_fib_node_get,
+ .fnv_last_lock = geneve_tunnel_last_lock_gone,
+ .fnv_back_walk = geneve_tunnel_back_walk,
+};
+
+
+#define foreach_copy_field \
+_(vni) \
+_(mcast_sw_if_index) \
+_(encap_fib_index) \
+_(decap_next_index) \
+_(local) \
+_(remote)
+
+static int
+geneve_rewrite (geneve_tunnel_t * t, bool is_ip6)
+{
+ union
+ {
+ ip4_geneve_header_t *h4;
+ ip6_geneve_header_t *h6;
+ u8 *rw;
+ } r =
+ {
+ .rw = 0};
+ int len = is_ip6 ? sizeof *r.h6 : sizeof *r.h4;
+#if SUPPORT_OPTIONS_HEADER==1
+ len += t->options_len;
+#endif
+
+ vec_validate_aligned (r.rw, len - 1, CLIB_CACHE_LINE_BYTES);
+
+ udp_header_t *udp;
+ geneve_header_t *geneve;
+ /* Fixed portion of the (outer) ip header */
+ if (!is_ip6)
+ {
+ ip4_header_t *ip = &r.h4->ip4;
+ udp = &r.h4->udp, geneve = &r.h4->geneve;
+ ip->ip_version_and_header_length = 0x45;
+ ip->ttl = 254;
+ ip->protocol = IP_PROTOCOL_UDP;
+
+ ip->src_address = t->local.ip4;
+ ip->dst_address = t->remote.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, geneve = &r.h6->geneve;
+ 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->local.ip6;
+ ip->dst_address = t->remote.ip6;
+ }
+
+ /* UDP header, randomize local port on something, maybe? */
+ udp->src_port = clib_host_to_net_u16 (5251);
+ udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_geneve);
+
+ /* GENEVE header */
+ vnet_set_geneve_version (geneve, GENEVE_VERSION);
+#if SUPPORT_OPTIONS_HEADER==1
+ vnet_set_geneve_options_len (geneve, t->options_len);
+#else
+ vnet_set_geneve_options_len (geneve, 0);
+#endif
+ vnet_set_geneve_oamframe_bit (geneve, 0);
+ vnet_set_geneve_critical_bit (geneve, 0);
+ vnet_set_geneve_protocol (geneve, GENEVE_ETH_PROTOCOL);
+ vnet_set_geneve_vni (geneve, t->vni);
+
+ t->rewrite = r.rw;
+ return (0);
+}
+
+static bool
+geneve_decap_next_is_valid (geneve_main_t * vxm, u32 is_ip6,
+ u32 decap_next_index)
+{
+ vlib_main_t *vm = vxm->vlib_main;
+ u32 input_idx =
+ (!is_ip6) ? geneve4_input_node.index : geneve6_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 (geneve_main.vtep4, ip->ip4.as_u32) :
+ hash_get_mem (geneve_main.vtep6, &ip->ip6);
+ if (vtep)
+ return ++(*vtep);
+ ip46_address_is_ip4 (ip) ?
+ hash_set (geneve_main.vtep4, ip->ip4.as_u32, 1) :
+ hash_set_key_copy (&geneve_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 (geneve_main.vtep4, ip->ip4.as_u32) :
+ hash_get_mem (geneve_main.vtep6, &ip->ip6);
+ ASSERT (vtep);
+ if (--(*vtep) != 0)
+ return *vtep;
+ ip46_address_is_ip4 (ip) ?
+ hash_unset (geneve_main.vtep4, ip->ip4.as_u32) :
+ hash_unset_key_free (&geneve_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 (geneve_main.mcast_shared, ip);
+ 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_key_copy (&geneve_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_GENEVE);
+
+ hash_unset_key_free (&geneve_main.mcast_shared, remote);
+}
+
+static inline fib_protocol_t
+fib_ip_proto (bool is_ip6)
+{
+ return (is_ip6) ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4;
+}
+
+int vnet_geneve_add_del_tunnel
+ (vnet_geneve_add_del_tunnel_args_t * a, u32 * sw_if_indexp)
+{
+ geneve_main_t *vxm = &geneve_main;
+ geneve_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;
+ geneve4_tunnel_key_t key4;
+ geneve6_tunnel_key_t key6;
+ u32 is_ip6 = a->is_ip6;
+
+ if (!is_ip6)
+ {
+ key4.remote = a->remote.ip4.as_u32;
+ key4.vni = clib_host_to_net_u32 (a->vni << 8);
+ p = hash_get (vxm->geneve4_tunnel_by_key, key4.as_u64);
+ }
+ else
+ {
+ key6.remote = a->remote.ip6;
+ key6.vni = clib_host_to_net_u32 (a->vni << 8);
+ p = hash_get_mem (vxm->geneve6_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 = GENEVE_INPUT_NEXT_L2_INPUT;
+ if (!geneve_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 = geneve_rewrite (t, is_ip6);
+ if (rv)
+ {
+ pool_put (vxm->tunnels, t);
+ return rv;
+ }
+
+ /* copy the key */
+ if (is_ip6)
+ hash_set_key_copy (&vxm->geneve6_tunnel_by_key, &key6,
+ t - vxm->tunnels);
+ else
+ hash_set (vxm->geneve4_tunnel_by_key, key4.as_u64, t - vxm->tunnels);
+
+ vnet_hw_interface_t *hi;
+ if (vec_len (vxm->free_geneve_tunnel_hw_if_indices) > 0)
+ {
+ vnet_interface_main_t *im = &vnm->interface_main;
+ hw_if_index = vxm->free_geneve_tunnel_hw_if_indices
+ [vec_len (vxm->free_geneve_tunnel_hw_if_indices) - 1];
+ _vec_len (vxm->free_geneve_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, geneve_device_class.index, t - vxm->tunnels,
+ geneve_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_GENEVE_TUNNEL);
+ fib_prefix_t tun_remote_pfx;
+ u32 encap_index = !is_ip6 ?
+ geneve4_encap_node.index : geneve6_encap_node.index;
+ vnet_flood_class_t flood_class = VNET_FLOOD_CLASS_TUNNEL_NORMAL;
+
+ fib_prefix_from_ip46_addr (&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 (&t->local);
+ t->fib_entry_index = fib_table_entry_special_add
+ (t->encap_fib_index, &tun_remote_pfx, FIB_SOURCE_RR,
+ FIB_ENTRY_FLAG_NONE);
+ t->sibling_index = fib_entry_child_add
+ (t->fib_entry_index, FIB_NODE_TYPE_GENEVE_TUNNEL,
+ t - vxm->tunnels);
+ geneve_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->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 = 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_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_GENEVE,
+ &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_GENEVE,
+ &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->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;
+ }
+
+ /* Set geneve 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_geneve_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->geneve4_tunnel_by_key, key4.as_u64);
+ else
+ hash_unset_key_free (&vxm->geneve6_tunnel_by_key, &key6);
+
+ if (!ip46_address_is_multicast (&t->remote))
+ {
+ vtep_addr_unref (&t->local);
+ 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->remote) == 0)
+ {
+ mcast_shared_remove (&t->remote);
+ }
+
+ 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)
+{
+ geneve_main_t *vxm = &geneve_main;
+ vlib_main_t *vm = vxm->vlib_main;
+ uword input_node = (ipv4_set) ? geneve4_input_node.index :
+ geneve6_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);
+ geneve_main_t *vxm = &geneve_main;
+ vlib_main_t *vm = vxm->vlib_main;
+ u32 node_index;
+ u32 tmp;
+
+ if (unformat (input, "l2"))
+ *result = GENEVE_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 *
+geneve_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 local, remote;
+ u8 is_add = 1;
+ u8 local_set = 0;
+ u8 remote_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 = GENEVE_INPUT_NEXT_L2_INPUT;
+ u32 vni = 0;
+ u32 tmp;
+ int rv;
+ vnet_geneve_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 (&local, 0, sizeof local);
+ memset (&remote, 0, sizeof remote);
+
+ /* 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))
+ {
+ 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 (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 (ip46_address_cmp (&local, &remote) == 0)
+ {
+ error =
+ clib_error_return (0, "local and remote 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_geneve_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_geneve_add_del_tunnel returned %d", rv);
+ goto done;
+ }
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+/*?
+ * Add or delete a GENEVE Tunnel.
+ *
+ * GENEVE 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 GENEVE 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 GENEVE
+ * segment.
+ *
+ * @cliexpar
+ * Example of how to create a GENEVE Tunnel:
+ * @cliexcmd{create geneve tunnel local 10.0.3.1 remote 10.0.3.3 vni 13 encap-vrf-id 7}
+ * Example of how to delete a GENEVE Tunnel:
+ * @cliexcmd{create geneve tunnel local 10.0.3.1 remote 10.0.3.3 vni 13 del}
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (create_geneve_tunnel_command, static) = {
+ .path = "create geneve tunnel",
+ .short_help =
+ "create geneve tunnel local <local-vtep-addr>"
+ " {remote <remote-vtep-addr>|group <mcast-vtep-addr> <intf-name>} vni <nn>"
+ " [encap-vrf-id <nn>] [decap-next [l2|node <name>]] [del]",
+ .function = geneve_add_del_tunnel_command_fn,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+show_geneve_tunnel_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ geneve_main_t *vxm = &geneve_main;
+ geneve_tunnel_t *t;
+
+ if (pool_elts (vxm->tunnels) == 0)
+ vlib_cli_output (vm, "No geneve tunnels configured...");
+
+ pool_foreach (t, vxm->tunnels, (
+ {
+ vlib_cli_output (vm, "%U",
+ format_geneve_tunnel, t);
+ }
+ ));
+
+ return 0;
+}
+
+/*?
+ * Display all the GENEVE Tunnel entries.
+ *
+ * @cliexpar
+ * Example of how to display the GENEVE Tunnel entries:
+ * @cliexstart{show geneve 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
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (show_geneve_tunnel_command, static) = {
+ .path = "show geneve tunnel",
+ .short_help = "show geneve tunnel",
+ .function = show_geneve_tunnel_command_fn,
+};
+/* *INDENT-ON* */
+
+
+void
+vnet_int_geneve_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable)
+{
+ if (is_ip6)
+ vnet_feature_enable_disable ("ip6-unicast", "ip6-geneve-bypass",
+ sw_if_index, is_enable, 0, 0);
+ else
+ vnet_feature_enable_disable ("ip4-unicast", "ip4-geneve-bypass",
+ sw_if_index, is_enable, 0, 0);
+}
+
+
+static clib_error_t *
+set_ip_geneve_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_geneve_bypass_mode (sw_if_index, is_ip6, is_enable);
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+static clib_error_t *
+set_ip4_geneve_bypass (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ return set_ip_geneve_bypass (0, input, cmd);
+}
+
+/*?
+ * This command adds the 'ip4-geneve-bypass' graph node for a given interface.
+ * By adding the IPv4 geneve-bypass graph node to an interface, the node checks
+ * for and validate input geneve packet and bypass ip4-lookup, ip4-local,
+ * ip4-udp-lookup nodes to speedup geneve packet forwarding. This node will
+ * cause extra overhead to for non-geneve packets which is kept at a minimum.
+ *
+ * @cliexpar
+ * @parblock
+ * Example of graph node before ip4-geneve-bypass is enabled:
+ * @cliexstart{show vlib graph ip4-geneve-bypass}
+ * Name Next Previous
+ * ip4-geneve-bypass error-drop [0]
+ * geneve4-input [1]
+ * ip4-lookup [2]
+ * @cliexend
+ *
+ * Example of how to enable ip4-geneve-bypass on an interface:
+ * @cliexcmd{set interface ip geneve-bypass GigabitEthernet2/0/0}
+ *
+ * Example of graph node after ip4-geneve-bypass is enabled:
+ * @cliexstart{show vlib graph ip4-geneve-bypass}
+ * Name Next Previous
+ * ip4-geneve-bypass error-drop [0] ip4-input
+ * geneve4-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-geneve-bypass
+ * ip4-lookup
+ * ...
+ * @cliexend
+ *
+ * Example of how to disable ip4-geneve-bypass on an interface:
+ * @cliexcmd{set interface ip geneve-bypass GigabitEthernet2/0/0 del}
+ * @endparblock
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_interface_ip_geneve_bypass_command, static) = {
+ .path = "set interface ip geneve-bypass",
+ .function = set_ip4_geneve_bypass,
+ .short_help = "set interface ip geneve-bypass <interface> [del]",
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+set_ip6_geneve_bypass (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ return set_ip_geneve_bypass (1, input, cmd);
+}
+
+/*?
+ * This command adds the 'ip6-geneve-bypass' graph node for a given interface.
+ * By adding the IPv6 geneve-bypass graph node to an interface, the node checks
+ * for and validate input geneve packet and bypass ip6-lookup, ip6-local,
+ * ip6-udp-lookup nodes to speedup geneve packet forwarding. This node will
+ * cause extra overhead to for non-geneve packets which is kept at a minimum.
+ *
+ * @cliexpar
+ * @parblock
+ * Example of graph node before ip6-geneve-bypass is enabled:
+ * @cliexstart{show vlib graph ip6-geneve-bypass}
+ * Name Next Previous
+ * ip6-geneve-bypass error-drop [0]
+ * geneve6-input [1]
+ * ip6-lookup [2]
+ * @cliexend
+ *
+ * Example of how to enable ip6-geneve-bypass on an interface:
+ * @cliexcmd{set interface ip6 geneve-bypass GigabitEthernet2/0/0}
+ *
+ * Example of graph node after ip6-geneve-bypass is enabled:
+ * @cliexstart{show vlib graph ip6-geneve-bypass}
+ * Name Next Previous
+ * ip6-geneve-bypass error-drop [0] ip6-input
+ * geneve6-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-geneve-bypass
+ * ip6-lookup
+ * ...
+ * @cliexend
+ *
+ * Example of how to disable ip6-geneve-bypass on an interface:
+ * @cliexcmd{set interface ip6 geneve-bypass GigabitEthernet2/0/0 del}
+ * @endparblock
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_interface_ip6_geneve_bypass_command, static) = {
+ .path = "set interface ip6 geneve-bypass",
+ .function = set_ip6_geneve_bypass,
+ .short_help = "set interface ip geneve-bypass <interface> [del]",
+};
+/* *INDENT-ON* */
+
+clib_error_t *
+geneve_init (vlib_main_t * vm)
+{
+ geneve_main_t *vxm = &geneve_main;
+
+ vxm->vnet_main = vnet_get_main ();
+ vxm->vlib_main = vm;
+
+ /* initialize the ip6 hash */
+ vxm->geneve6_tunnel_by_key = hash_create_mem (0,
+ sizeof (geneve6_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_geneve,
+ geneve4_input_node.index, /* is_ip4 */ 1);
+ udp_register_dst_port (vm, UDP_DST_PORT_geneve6,
+ geneve6_input_node.index, /* is_ip4 */ 0);
+
+ fib_node_register_type (FIB_NODE_TYPE_GENEVE_TUNNEL, &geneve_vft);
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (geneve_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff