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gerrit.nordix.org / fdio / vpp / 87c30d9c1072a3305d0385e9ba8eb1b60fb068ce / . / src / vnet / vxlan-gpe / vxlan_gpe.c
blob: b13a7343ddd0eefb04161cff14d82fa88c1a990b [file] [log] [blame]
/*
* 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 <vnet/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/mfib/mfib_table.h>
#include <vnet/adj/adj_mcast.h>
#include <vnet/interface.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;
/**
* @brief Tracing function for VXLAN GPE tunnel packets
*
* @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] local: %U remote: %U ",
t - ngm->tunnels,
format_ip46_address, &t->local, IP46_TYPE_ANY,
format_ip46_address, &t->remote, IP46_TYPE_ANY);
s = format (s, " vxlan VNI %d ", t->vni);
switch (t->protocol)
{
case VXLAN_GPE_PROTOCOL_IP4:
s = format (s, "next-protocol ip4");
break;
case VXLAN_GPE_PROTOCOL_IP6:
s = format (s, "next-protocol ip6");
break;
case VXLAN_GPE_PROTOCOL_ETHERNET:
s = format (s, "next-protocol ethernet");
break;
case VXLAN_GPE_PROTOCOL_NSH:
s = format (s, "next-protocol nsh");
break;
default:
s = format (s, "next-protocol unknown %d", t->protocol);
}
if (ip46_address_is_multicast (&t->remote))
s = format (s, "mcast_sw_if_index %d ", t->mcast_sw_if_index);
s = format (s, " fibs: (encap %d, decap %d)",
t->encap_fib_index,
t->decap_fib_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);
}
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;
}
/**
* @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,
.tx_function = dummy_interface_tx,
.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)
#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 (4790);
h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE);
/* 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 (4790);
h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE);
/* 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);
}
static void
hash_set_key_copy (uword ** h, void * key, uword v) {
size_t ksz = hash_header(*h)->user;
void * copy = clib_mem_alloc (ksz);
clib_memcpy (copy, key, ksz);
hash_set_mem (*h, copy, v);
}
static void
hash_unset_key_free (uword ** h, void * key) {
hash_pair_t * hp = hash_get_pair_mem (*h, key);
ASSERT (hp);
key = uword_to_pointer (hp->key, void *);
hash_unset_mem (*h, key);
clib_mem_free (key);
}
static uword
vtep_addr_ref(ip46_address_t *ip)
{
uword *vtep = ip46_address_is_ip4(ip) ?
hash_get (vxlan_gpe_main.vtep4, ip->ip4.as_u32) :
hash_get_mem (vxlan_gpe_main.vtep6, &ip->ip6);
if (vtep)
return ++(*vtep);
ip46_address_is_ip4(ip) ?
hash_set (vxlan_gpe_main.vtep4, ip->ip4.as_u32, 1) :
hash_set_key_copy (&vxlan_gpe_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_gpe_main.vtep4, ip->ip4.as_u32) :
hash_get_mem (vxlan_gpe_main.vtep6, &ip->ip6);
ASSERT(vtep);
if (--(*vtep) != 0)
return *vtep;
ip46_address_is_ip4(ip) ?
hash_unset (vxlan_gpe_main.vtep4, ip->ip4.as_u32) :
hash_unset_key_free (&vxlan_gpe_main.vtep6, &ip->ip6);
return 0;
}
typedef CLIB_PACKED(union {
struct {
fib_node_index_t mfib_entry_index;
adj_index_t mcast_adj_index;
};
u64 as_u64;
}) mcast_shared_t;
static inline mcast_shared_t
mcast_shared_get(ip46_address_t * ip)
{
ASSERT(ip46_address_is_multicast(ip));
uword * p = hash_get_mem (vxlan_gpe_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 (&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_key_free (&vxlan_gpe_main.mcast_shared, remote);
}
static inline fib_protocol_t
fib_ip_proto(bool is_ip6)
{
return (is_ip6) ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4;
}
/**
* @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;
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.pad = 0;
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);
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);
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 (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 (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_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);
hi->output_node_index = vxlan_gpe_encap_node.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;
u32 encap_index = vxlan_gpe_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_VXLAN_GPE_TUNNEL, t - ngm->tunnels);
vxlan_gpe_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_VXLAN_GPE,
&path,
MFIB_ITF_FLAG_FORWARD);
path.frp_sw_if_index = a->mcast_sw_if_index;
path.frp_flags = FIB_ROUTE_PATH_FLAG_NONE;
mfei = mfib_table_entry_path_update(t->encap_fib_index,
&mpfx,
MFIB_SOURCE_VXLAN_GPE,
&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 vxlan tunnel output node */
hi->output_node_index = encap_index;
vnet_get_sw_interface (vnet_get_main(), sw_if_index)->flood_class = flood_class;
}
else
{
/* deleting a tunnel: tunnel must exist */
if (!p)
return VNET_API_ERROR_NO_SUCH_ENTRY;
t = pool_elt_at_index (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, 0, 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_key_free (&ngm->vxlan6_gpe_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 (ngm->tunnels, t);
}
if (sw_if_indexp)
*sw_if_indexp = sw_if_index;
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;
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, "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;
}
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 sengment.
*
* @cliexpar
* Example of how to create a VXLAN-GPE Tunnel:
* @cliexcmd{create vxlan-gpe tunnel local 10.0.3.1 local 10.0.3.3 vni 13 encap-vrf-id 7}
* Example of how to delete a VXLAN Tunnel:
* @cliexcmd{create vxlan tunnel src 10.0.3.1 remote 10.0.3.3 vni 13 del}
?*/
/* *INDENT-OFF* */
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,
};
/* *INDENT-ON* */
/**
* @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
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (show_vxlan_gpe_tunnel_command, static) = {
.path = "show vxlan-gpe",
.function = show_vxlan_gpe_tunnel_command_fn,
};
/* *INDENT-ON* */
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 enabed 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
?*/
/* *INDENT-OFF* */
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]",
};
/* *INDENT-ON* */
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 enabed 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
?*/
/* *INDENT-OFF* */
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 ip vxlan-gpe-bypass <interface> [del]",
};
/* *INDENT-ON* */
/* *INDENT-OFF* */
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"),
};
/* *INDENT-ON* */
/**
* @brief Feature init function for VXLAN GPE
*
* @param *vm
*
* @return error
*
*/
clib_error_t *vxlan_gpe_init (vlib_main_t *vm)
{
vxlan_gpe_main_t *ngm = &vxlan_gpe_main;
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));
udp_register_dst_port (vm, UDP_DST_PORT_VXLAN_GPE,
vxlan4_gpe_input_node.index, 1 /* is_ip4 */);
udp_register_dst_port (vm, UDP_DST_PORT_VXLAN6_GPE,
vxlan6_gpe_input_node.index, 0 /* is_ip4 */);
/* 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_ETHERNET_INPUT);
fib_node_register_type(FIB_NODE_TYPE_VXLAN_GPE_TUNNEL, &vxlan_gpe_vft);
return 0;
}
VLIB_INIT_FUNCTION(vxlan_gpe_init);