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gerrit.nordix.org / fdio / vpp / 0bee9ce4af04322c56f7511f24bda4874e78a4b4 / . / src / vnet / vxlan / vxlan.c
blob: 97321421a84f489f9314750114990506c8d5483d [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.
*/
#include <vnet/vxlan/vxlan.h>
#include <vnet/ip/format.h>
#include <vnet/fib/fib_entry.h>
#include <vnet/fib/fib_table.h>
#include <vnet/mfib/mfib_table.h>
#include <vnet/adj/adj_mcast.h>
#include <vnet/interface.h>
#include <vlib/vlib.h>
/**
* @file
* @brief VXLAN.
*
* VXLAN provides the features needed to allow L2 bridge domains (BDs)
* to span multiple servers. This is done by building an L2 overlay on
* top of an L3 network underlay using VXLAN tunnels.
*
* This makes it possible for servers to be co-located in the same data
* center or be separated geographically as long as they are reachable
* through the underlay L3 network.
*
* You can refer to this kind of L2 overlay bridge domain as a VXLAN
* (Virtual eXtensible VLAN) segment.
*/
vxlan_main_t vxlan_main;
static u8 * format_decap_next (u8 * s, va_list * args)
{
u32 next_index = va_arg (*args, u32);
if (next_index == VXLAN_INPUT_NEXT_DROP)
return format (s, "drop");
else
return format (s, "index %d", next_index);
return s;
}
u8 * format_vxlan_tunnel (u8 * s, va_list * args)
{
vxlan_tunnel_t * t = va_arg (*args, vxlan_tunnel_t *);
s = format (s,
"[%d] instance %d src %U dst %U vni %d fib-idx %d sw-if-idx %d ",
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);
s = format (s, "encap-dpo-idx %d ", t->next_dpo.dpoi_index);
if (PREDICT_FALSE (t->decap_next_index != VXLAN_INPUT_NEXT_L2_INPUT))
s = format (s, "decap-next-%U ", format_decap_next, t->decap_next_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_name (u8 * s, va_list * args)
{
u32 dev_instance = va_arg (*args, u32);
vxlan_main_t * vxm = &vxlan_main;
vxlan_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_tunnel%d", t->user_instance);
}
static clib_error_t *
vxlan_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
{
u32 hw_flags = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
VNET_HW_INTERFACE_FLAG_LINK_UP : 0;
vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
return /* no error */ 0;
}
VNET_DEVICE_CLASS (vxlan_device_class,static) = {
.name = "VXLAN",
.format_device_name = format_vxlan_name,
.format_tx_trace = format_vxlan_encap_trace,
.admin_up_down_function = vxlan_interface_admin_up_down,
};
static u8 * format_vxlan_header_with_length (u8 * s, va_list * args)
{
u32 dev_instance = va_arg (*args, u32);
s = format (s, "unimplemented dev %u", dev_instance);
return s;
}
VNET_HW_INTERFACE_CLASS (vxlan_hw_class) = {
.name = "VXLAN",
.format_header = format_vxlan_header_with_length,
.build_rewrite = default_build_rewrite,
};
static void
vxlan_tunnel_restack_dpo(vxlan_tunnel_t * t)
{
dpo_id_t dpo = DPO_INVALID;
u32 encap_index = ip46_address_is_ip4(&t->dst) ?
vxlan4_encap_node.index : vxlan6_encap_node.index;
fib_forward_chain_type_t forw_type = ip46_address_is_ip4(&t->dst) ?
FIB_FORW_CHAIN_TYPE_UNICAST_IP4 : FIB_FORW_CHAIN_TYPE_UNICAST_IP6;
fib_entry_contribute_forwarding (t->fib_entry_index, forw_type, &dpo);
dpo_stack_from_node (encap_index, &t->next_dpo, &dpo);
dpo_reset(&dpo);
}
static vxlan_tunnel_t *
vxlan_tunnel_from_fib_node (fib_node_t *node)
{
ASSERT(FIB_NODE_TYPE_VXLAN_TUNNEL == node->fn_type);
return ((vxlan_tunnel_t*) (((char*)node) -
STRUCT_OFFSET_OF(vxlan_tunnel_t, node)));
}
/**
* Function definition to backwalk a FIB node -
* Here we will restack the new dpo of VXLAN DIP to encap node.
*/
static fib_node_back_walk_rc_t
vxlan_tunnel_back_walk (fib_node_t *node,
fib_node_back_walk_ctx_t *ctx)
{
vxlan_tunnel_restack_dpo(vxlan_tunnel_from_fib_node(node));
return (FIB_NODE_BACK_WALK_CONTINUE);
}
/**
* Function definition to get a FIB node from its index
*/
static fib_node_t*
vxlan_tunnel_fib_node_get (fib_node_index_t index)
{
vxlan_tunnel_t * t;
vxlan_main_t * vxm = &vxlan_main;
t = pool_elt_at_index(vxm->tunnels, index);
return (&t->node);
}
/**
* Function definition to inform the FIB node that its last lock has gone.
*/
static void
vxlan_tunnel_last_lock_gone (fib_node_t *node)
{
/*
* The VXLAN tunnel is a root of the graph. As such
* it never has children and thus is never locked.
*/
ASSERT(0);
}
/*
* Virtual function table registered by VXLAN tunnels
* for participation in the FIB object graph.
*/
const static fib_node_vft_t vxlan_vft = {
.fnv_get = vxlan_tunnel_fib_node_get,
.fnv_last_lock = vxlan_tunnel_last_lock_gone,
.fnv_back_walk = vxlan_tunnel_back_walk,
};
#define foreach_copy_field \
_(vni) \
_(mcast_sw_if_index) \
_(encap_fib_index) \
_(decap_next_index) \
_(src) \
_(dst)
static void
vxlan_rewrite (vxlan_tunnel_t * t, bool is_ip6)
{
union {
ip4_vxlan_header_t * h4;
ip6_vxlan_header_t * h6;
u8 *rw;
} r = { .rw = 0 };
int len = is_ip6 ? sizeof *r.h6 : sizeof *r.h4;
vec_validate_aligned (r.rw, len-1, CLIB_CACHE_LINE_BYTES);
udp_header_t * udp;
vxlan_header_t * vxlan;
/* Fixed portion of the (outer) ip header */
if (!is_ip6)
{
ip4_header_t * ip = &r.h4->ip4;
udp = &r.h4->udp, vxlan = &r.h4->vxlan;
ip->ip_version_and_header_length = 0x45;
ip->ttl = 254;
ip->protocol = IP_PROTOCOL_UDP;
ip->src_address = t->src.ip4;
ip->dst_address = t->dst.ip4;
/* we fix up the ip4 header length and checksum after-the-fact */
ip->checksum = ip4_header_checksum (ip);
}
else
{
ip6_header_t * ip = &r.h6->ip6;
udp = &r.h6->udp, vxlan = &r.h6->vxlan;
ip->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32(6 << 28);
ip->hop_limit = 255;
ip->protocol = IP_PROTOCOL_UDP;
ip->src_address = t->src.ip6;
ip->dst_address = t->dst.ip6;
}
/* UDP header, randomize src port on something, maybe? */
udp->src_port = clib_host_to_net_u16 (4789);
udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_vxlan);
/* VXLAN header */
vnet_set_vni_and_flags(vxlan, t->vni);
t->rewrite = r.rw;
}
static bool
vxlan_decap_next_is_valid (vxlan_main_t * vxm, u32 is_ip6, u32 decap_next_index)
{
vlib_main_t * vm = vxm->vlib_main;
u32 input_idx = (!is_ip6) ? vxlan4_input_node.index : vxlan6_input_node.index;
vlib_node_runtime_t *r = vlib_node_get_runtime (vm, input_idx);
return decap_next_index < r->n_next_nodes;
}
static uword
vtep_addr_ref(ip46_address_t *ip)
{
uword *vtep = ip46_address_is_ip4(ip) ?
hash_get (vxlan_main.vtep4, ip->ip4.as_u32) :
hash_get_mem (vxlan_main.vtep6, &ip->ip6);
if (vtep)
return ++(*vtep);
ip46_address_is_ip4(ip) ?
hash_set (vxlan_main.vtep4, ip->ip4.as_u32, 1) :
hash_set_mem_alloc (&vxlan_main.vtep6, &ip->ip6, 1);
return 1;
}
static uword
vtep_addr_unref(ip46_address_t *ip)
{
uword *vtep = ip46_address_is_ip4(ip) ?
hash_get (vxlan_main.vtep4, ip->ip4.as_u32) :
hash_get_mem (vxlan_main.vtep6, &ip->ip6);
ASSERT(vtep);
if (--(*vtep) != 0)
return *vtep;
ip46_address_is_ip4(ip) ?
hash_unset (vxlan_main.vtep4, ip->ip4.as_u32) :
hash_unset_mem_free (&vxlan_main.vtep6, &ip->ip6);
return 0;
}
typedef CLIB_PACKED(union {
struct {
fib_node_index_t mfib_entry_index;
adj_index_t mcast_adj_index;
};
u64 as_u64;
}) mcast_shared_t;
static inline mcast_shared_t
mcast_shared_get(ip46_address_t * ip)
{
ASSERT(ip46_address_is_multicast(ip));
uword * p = hash_get_mem (vxlan_main.mcast_shared, ip);
ASSERT(p);
return (mcast_shared_t) { .as_u64 = *p };
}
static inline void
mcast_shared_add(ip46_address_t *dst,
fib_node_index_t mfei,
adj_index_t ai)
{
mcast_shared_t new_ep = {
.mcast_adj_index = ai,
.mfib_entry_index = mfei,
};
hash_set_mem_alloc (&vxlan_main.mcast_shared, dst, new_ep.as_u64);
}
static inline void
mcast_shared_remove(ip46_address_t *dst)
{
mcast_shared_t ep = mcast_shared_get(dst);
adj_unlock(ep.mcast_adj_index);
mfib_table_entry_delete_index(ep.mfib_entry_index,
MFIB_SOURCE_VXLAN);
hash_unset_mem_free (&vxlan_main.mcast_shared, dst);
}
int vnet_vxlan_add_del_tunnel
(vnet_vxlan_add_del_tunnel_args_t *a, u32 * sw_if_indexp)
{
vxlan_main_t * vxm = &vxlan_main;
vxlan_tunnel_t *t = 0;
vnet_main_t * vnm = vxm->vnet_main;
uword * p;
u32 sw_if_index = ~0;
vxlan4_tunnel_key_t key4;
vxlan6_tunnel_key_t key6;
u32 is_ip6 = a->is_ip6;
if (!is_ip6)
{
key4.src = a->dst.ip4.as_u32; /* decap src in key is encap dst in config */
key4.vni = clib_host_to_net_u32 (a->vni << 8);
p = hash_get (vxm->vxlan4_tunnel_by_key, key4.as_u64);
}
else
{
key6.src = a->dst.ip6;
key6.vni = clib_host_to_net_u32 (a->vni << 8);
p = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6);
}
if (a->is_add)
{
l2input_main_t * l2im = &l2input_main;
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)
return VNET_API_ERROR_TUNNEL_EXIST;
/*if not set explicitly, default to l2 */
if(a->decap_next_index == ~0)
a->decap_next_index = VXLAN_INPUT_NEXT_L2_INPUT;
if (!vxlan_decap_next_is_valid(vxm, is_ip6, a->decap_next_index))
return VNET_API_ERROR_INVALID_DECAP_NEXT;
pool_get_aligned (vxm->tunnels, t, CLIB_CACHE_LINE_BYTES);
*t = (vxlan_tunnel_t){ 0 };
dev_instance = t - vxm->tunnels;
/* copy from arg structure */
#define _(x) t->x = a->x;
foreach_copy_field;
#undef _
vxlan_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 */
if (is_ip6)
hash_set_mem_alloc (&vxm->vxlan6_tunnel_by_key, &key6, dev_instance);
else
hash_set (vxm->vxlan4_tunnel_by_key, key4.as_u64, dev_instance);
t->hw_if_index = vnet_register_interface
(vnm, vxlan_device_class.index, dev_instance,
vxlan_hw_class.index, dev_instance);
vnet_hw_interface_t * hi = vnet_get_hw_interface (vnm, t->hw_if_index);
/* Set vxlan tunnel output node */
u32 encap_index = !is_ip6 ?
vxlan4_encap_node.index : vxlan6_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;
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_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_table_entry_special_add
(t->encap_fib_index, &tun_dst_pfx, FIB_SOURCE_RR,
FIB_ENTRY_FLAG_NONE);
t->sibling_index = fib_entry_child_add
(t->fib_entry_index, FIB_NODE_TYPE_VXLAN_TUNNEL, dev_instance);
vxlan_tunnel_restack_dpo(t);
}
else
{
/* Multicast tunnel -
* as the same mcast group can be used for mutiple mcast tunnels
* with different VNIs, create the output fib adjecency only if
* it does not already exist
*/
fib_protocol_t fp = fib_ip_proto(is_ip6);
if (vtep_addr_ref(&t->dst) == 1)
{
fib_node_index_t mfei;
adj_index_t ai;
fib_route_path_t path = {
.frp_proto = fib_proto_to_dpo(fp),
.frp_addr = zero_addr,
.frp_sw_if_index = 0xffffffff,
.frp_fib_index = ~0,
.frp_weight = 0,
.frp_flags = FIB_ROUTE_PATH_LOCAL,
};
const mfib_prefix_t mpfx = {
.fp_proto = fp,
.fp_len = (is_ip6 ? 128 : 32),
.fp_grp_addr = tun_dst_pfx.fp_addr,
};
/*
* Setup the (*,G) to receive traffic on the mcast group
* - the forwarding interface is for-us
* - the accepting interface is that from the API
*/
mfib_table_entry_path_update(t->encap_fib_index,
&mpfx,
MFIB_SOURCE_VXLAN,
&path,
MFIB_ITF_FLAG_FORWARD);
path.frp_sw_if_index = a->mcast_sw_if_index;
path.frp_flags = FIB_ROUTE_PATH_FLAG_NONE;
mfei = mfib_table_entry_path_update(t->encap_fib_index,
&mpfx,
MFIB_SOURCE_VXLAN,
&path,
MFIB_ITF_FLAG_ACCEPT);
/*
* Create the mcast adjacency to send traffic to the group
*/
ai = adj_mcast_add_or_lock(fp,
fib_proto_to_link(fp),
a->mcast_sw_if_index);
/*
* create a new end-point
*/
mcast_shared_add(&t->dst, mfei, ai);
}
dpo_id_t dpo = DPO_INVALID;
mcast_shared_t ep = mcast_shared_get(&t->dst);
/* Stack shared mcast dst mac addr rewrite on encap */
dpo_set (&dpo, DPO_ADJACENCY_MCAST,
fib_proto_to_dpo(fp),
ep.mcast_adj_index);
dpo_stack_from_node (encap_index, &t->next_dpo, &dpo);
dpo_reset (&dpo);
flood_class = VNET_FLOOD_CLASS_TUNNEL_MASTER;
}
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 */);
vxm->tunnel_index_by_sw_if_index[sw_if_index] = ~0;
if (!is_ip6)
hash_unset (vxm->vxlan4_tunnel_by_key, key4.as_u64);
else
hash_unset_mem_free (&vxm->vxlan6_tunnel_by_key, &key6);
if (!ip46_address_is_multicast(&t->dst))
{
vtep_addr_unref(&t->src);
fib_entry_child_remove(t->fib_entry_index, t->sibling_index);
fib_table_entry_delete_index(t->fib_entry_index, FIB_SOURCE_RR);
}
else if (vtep_addr_unref(&t->dst) == 0)
{
mcast_shared_remove(&t->dst);
}
vnet_delete_hw_interface (vnm, t->hw_if_index);
hash_unset (vxm->instance_used, t->user_instance);
fib_node_deinit(&t->node);
vec_free (t->rewrite);
pool_put (vxm->tunnels, t);
}
if (sw_if_indexp)
*sw_if_indexp = sw_if_index;
return 0;
}
static uword get_decap_next_for_node(u32 node_index, u32 ipv4_set)
{
vxlan_main_t * vxm = &vxlan_main;
vlib_main_t * vm = vxm->vlib_main;
uword input_node = (ipv4_set) ? vxlan4_input_node.index :
vxlan6_input_node.index;
return vlib_node_add_next (vm, input_node, node_index);
}
static uword unformat_decap_next (unformat_input_t * input, va_list * args)
{
u32 * result = va_arg (*args, u32 *);
u32 ipv4_set = va_arg (*args, int);
vxlan_main_t * vxm = &vxlan_main;
vlib_main_t * vm = vxm->vlib_main;
u32 node_index;
u32 tmp;
if (unformat (input, "l2"))
*result = VXLAN_INPUT_NEXT_L2_INPUT;
else if (unformat (input, "node %U", unformat_vlib_node, vm, &node_index))
*result = get_decap_next_for_node(node_index, ipv4_set);
else if (unformat (input, "%d", &tmp))
*result = tmp;
else
return 0;
return 1;
}
static clib_error_t *
vxlan_add_del_tunnel_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
unformat_input_t _line_input, * line_input = &_line_input;
ip46_address_t src , dst;
u8 is_add = 1;
u8 src_set = 0;
u8 dst_set = 0;
u8 grp_set = 0;
u8 ipv4_set = 0;
u8 ipv6_set = 0;
u32 instance = ~0;
u32 encap_fib_index = 0;
u32 mcast_sw_if_index = ~0;
u32 decap_next_index = VXLAN_INPUT_NEXT_L2_INPUT;
u32 vni = 0;
u32 tmp;
int rv;
vnet_vxlan_add_del_tunnel_args_t _a, * a = &_a;
u32 tunnel_sw_if_index;
clib_error_t *error = NULL;
/* Cant "universally zero init" (={0}) due to GCC bug 53119 */
memset(&src, 0, sizeof src);
memset(&dst, 0, sizeof dst);
/* Get a line of input. */
if (! unformat_user (input, unformat_line_input, line_input))
return 0;
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) {
if (unformat (line_input, "del"))
{
is_add = 0;
}
else if (unformat (line_input, "instance %d", &instance))
;
else if (unformat (line_input, "src %U",
unformat_ip4_address, &src.ip4))
{
src_set = 1;
ipv4_set = 1;
}
else if (unformat (line_input, "dst %U",
unformat_ip4_address, &dst.ip4))
{
dst_set = 1;
ipv4_set = 1;
}
else if (unformat (line_input, "src %U",
unformat_ip6_address, &src.ip6))
{
src_set = 1;
ipv6_set = 1;
}
else if (unformat (line_input, "dst %U",
unformat_ip6_address, &dst.ip6))
{
dst_set = 1;
ipv6_set = 1;
}
else if (unformat (line_input, "group %U %U",
unformat_ip4_address, &dst.ip4,
unformat_vnet_sw_interface,
vnet_get_main(), &mcast_sw_if_index))
{
grp_set = dst_set = 1;
ipv4_set = 1;
}
else if (unformat (line_input, "group %U %U",
unformat_ip6_address, &dst.ip6,
unformat_vnet_sw_interface,
vnet_get_main(), &mcast_sw_if_index))
{
grp_set = dst_set = 1;
ipv6_set = 1;
}
else if (unformat (line_input, "encap-vrf-id %d", &tmp))
{
encap_fib_index = fib_table_find (fib_ip_proto (ipv6_set), tmp);
if (encap_fib_index == ~0)
{
error = clib_error_return (0, "nonexistent encap-vrf-id %d", tmp);
goto done;
}
}
else if (unformat (line_input, "decap-next %U", unformat_decap_next,
&decap_next_index, ipv4_set))
;
else if (unformat (line_input, "vni %d", &vni))
{
if (vni >> 24)
{
error = clib_error_return (0, "vni %d out of range", vni);
goto done;
}
}
else
{
error = clib_error_return (0, "parse error: '%U'",
format_unformat_error, line_input);
goto done;
}
}
if (src_set == 0)
{
error = clib_error_return (0, "tunnel src address not specified");
goto done;
}
if (dst_set == 0)
{
error = clib_error_return (0, "tunnel dst address not specified");
goto done;
}
if (grp_set && !ip46_address_is_multicast(&dst))
{
error = clib_error_return (0, "tunnel group address not multicast");
goto done;
}
if (grp_set == 0 && ip46_address_is_multicast(&dst))
{
error = clib_error_return (0, "dst address must be unicast");
goto done;
}
if (grp_set && mcast_sw_if_index == ~0)
{
error = clib_error_return (0, "tunnel nonexistent multicast device");
goto done;
}
if (ipv4_set && ipv6_set)
{
error = clib_error_return (0, "both IPv4 and IPv6 addresses specified");
goto done;
}
if (ip46_address_cmp(&src, &dst) == 0)
{
error = clib_error_return (0, "src and dst addresses are identical");
goto done;
}
if (decap_next_index == ~0)
{
error = clib_error_return (0, "next node not found");
goto done;
}
if (vni == 0)
{
error = clib_error_return (0, "vni not specified");
goto done;
}
memset (a, 0, sizeof (*a));
a->is_add = is_add;
a->is_ip6 = ipv6_set;
a->instance = instance;
#define _(x) a->x = x;
foreach_copy_field;
#undef _
rv = vnet_vxlan_add_del_tunnel (a, &tunnel_sw_if_index);
switch(rv)
{
case 0:
if (is_add)
vlib_cli_output(vm, "%U\n", format_vnet_sw_if_index_name,
vnet_get_main(), tunnel_sw_if_index);
break;
case VNET_API_ERROR_TUNNEL_EXIST:
error = clib_error_return (0, "tunnel already exists...");
goto done;
case VNET_API_ERROR_NO_SUCH_ENTRY:
error = clib_error_return (0, "tunnel does not exist...");
goto done;
case VNET_API_ERROR_INSTANCE_IN_USE:
error = clib_error_return (0, "Instance is in use");
goto done;
default:
error = clib_error_return
(0, "vnet_vxlan_add_del_tunnel returned %d", rv);
goto done;
}
done:
unformat_free (line_input);
return error;
}
/*?
* Add or delete a VXLAN Tunnel.
*
* VXLAN provides the features needed to allow L2 bridge domains (BDs)
* to span multiple servers. This is done by building an L2 overlay on
* top of an L3 network underlay using VXLAN tunnels.
*
* This makes it possible for servers to be co-located in the same data
* center or be separated geographically as long as they are reachable
* through the underlay L3 network.
*
* You can refer to this kind of L2 overlay bridge domain as a VXLAN
* (Virtual eXtensible VLAN) segment.
*
* @cliexpar
* Example of how to create a VXLAN Tunnel:
* @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 encap-vrf-id 7}
* Example of how to create a VXLAN Tunnel with a known name, vxlan_tunnel42:
* @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 instance 42}
* Example of how to delete a VXLAN Tunnel:
* @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 del}
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (create_vxlan_tunnel_command, static) = {
.path = "create vxlan tunnel",
.short_help =
"create vxlan tunnel src <local-vtep-addr>"
" {dst <remote-vtep-addr>|group <mcast-vtep-addr> <intf-name>} vni <nn>"
" [instance <id>]"
" [encap-vrf-id <nn>] [decap-next [l2|node <name>]] [del]",
.function = vxlan_add_del_tunnel_command_fn,
};
/* *INDENT-ON* */
static clib_error_t *
show_vxlan_tunnel_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
vxlan_main_t * vxm = &vxlan_main;
vxlan_tunnel_t * t;
if (pool_elts (vxm->tunnels) == 0)
vlib_cli_output (vm, "No vxlan tunnels configured...");
pool_foreach (t, vxm->tunnels,
({
vlib_cli_output (vm, "%U", format_vxlan_tunnel, t);
}));
return 0;
}
/*?
* Display all the VXLAN Tunnel entries.
*
* @cliexpar
* Example of how to display the VXLAN Tunnel entries:
* @cliexstart{show vxlan tunnel}
* [0] src 10.0.3.1 dst 10.0.3.3 vni 13 encap_fib_index 0 sw_if_index 5 decap_next l2
* @cliexend
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (show_vxlan_tunnel_command, static) = {
.path = "show vxlan tunnel",
.short_help = "show vxlan tunnel",
.function = show_vxlan_tunnel_command_fn,
};
/* *INDENT-ON* */
void vnet_int_vxlan_bypass_mode (u32 sw_if_index,
u8 is_ip6,
u8 is_enable)
{
if (is_ip6)
vnet_feature_enable_disable ("ip6-unicast", "ip6-vxlan-bypass",
sw_if_index, is_enable, 0, 0);
else
vnet_feature_enable_disable ("ip4-unicast", "ip4-vxlan-bypass",
sw_if_index, is_enable, 0, 0);
}
static clib_error_t *
set_ip_vxlan_bypass (u32 is_ip6,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
unformat_input_t _line_input, * line_input = &_line_input;
vnet_main_t * vnm = vnet_get_main();
clib_error_t * error = 0;
u32 sw_if_index, is_enable;
sw_if_index = ~0;
is_enable = 1;
if (! unformat_user (input, unformat_line_input, line_input))
return 0;
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat_user (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index))
;
else if (unformat (line_input, "del"))
is_enable = 0;
else
{
error = unformat_parse_error (line_input);
goto done;
}
}
if (~0 == sw_if_index)
{
error = clib_error_return (0, "unknown interface `%U'",
format_unformat_error, line_input);
goto done;
}
vnet_int_vxlan_bypass_mode (sw_if_index, is_ip6, is_enable);
done:
unformat_free (line_input);
return error;
}
static clib_error_t *
set_ip4_vxlan_bypass (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
return set_ip_vxlan_bypass (0, input, cmd);
}
/*?
* This command adds the 'ip4-vxlan-bypass' graph node for a given interface.
* By adding the IPv4 vxlan-bypass graph node to an interface, the node checks
* for and validate input vxlan packet and bypass ip4-lookup, ip4-local,
* ip4-udp-lookup nodes to speedup vxlan packet forwarding. This node will
* cause extra overhead to for non-vxlan packets which is kept at a minimum.
*
* @cliexpar
* @parblock
* Example of graph node before ip4-vxlan-bypass is enabled:
* @cliexstart{show vlib graph ip4-vxlan-bypass}
* Name Next Previous
* ip4-vxlan-bypass error-drop [0]
* vxlan4-input [1]
* ip4-lookup [2]
* @cliexend
*
* Example of how to enable ip4-vxlan-bypass on an interface:
* @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0}
*
* Example of graph node after ip4-vxlan-bypass is enabled:
* @cliexstart{show vlib graph ip4-vxlan-bypass}
* Name Next Previous
* ip4-vxlan-bypass error-drop [0] ip4-input
* vxlan4-input [1] ip4-input-no-checksum
* ip4-lookup [2]
* @cliexend
*
* Example of how to display the feature enabed on an interface:
* @cliexstart{show ip interface features GigabitEthernet2/0/0}
* IP feature paths configured on GigabitEthernet2/0/0...
* ...
* ipv4 unicast:
* ip4-vxlan-bypass
* ip4-lookup
* ...
* @cliexend
*
* Example of how to disable ip4-vxlan-bypass on an interface:
* @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0 del}
* @endparblock
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (set_interface_ip_vxlan_bypass_command, static) = {
.path = "set interface ip vxlan-bypass",
.function = set_ip4_vxlan_bypass,
.short_help = "set interface ip vxlan-bypass <interface> [del]",
};
/* *INDENT-ON* */
static clib_error_t *
set_ip6_vxlan_bypass (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
return set_ip_vxlan_bypass (1, input, cmd);
}
/*?
* This command adds the 'ip6-vxlan-bypass' graph node for a given interface.
* By adding the IPv6 vxlan-bypass graph node to an interface, the node checks
* for and validate input vxlan packet and bypass ip6-lookup, ip6-local,
* ip6-udp-lookup nodes to speedup vxlan packet forwarding. This node will
* cause extra overhead to for non-vxlan packets which is kept at a minimum.
*
* @cliexpar
* @parblock
* Example of graph node before ip6-vxlan-bypass is enabled:
* @cliexstart{show vlib graph ip6-vxlan-bypass}
* Name Next Previous
* ip6-vxlan-bypass error-drop [0]
* vxlan6-input [1]
* ip6-lookup [2]
* @cliexend
*
* Example of how to enable ip6-vxlan-bypass on an interface:
* @cliexcmd{set interface ip6 vxlan-bypass GigabitEthernet2/0/0}
*
* Example of graph node after ip6-vxlan-bypass is enabled:
* @cliexstart{show vlib graph ip6-vxlan-bypass}
* Name Next Previous
* ip6-vxlan-bypass error-drop [0] ip6-input
* vxlan6-input [1] ip4-input-no-checksum
* ip6-lookup [2]
* @cliexend
*
* Example of how to display the feature enabed on an interface:
* @cliexstart{show ip interface features GigabitEthernet2/0/0}
* IP feature paths configured on GigabitEthernet2/0/0...
* ...
* ipv6 unicast:
* ip6-vxlan-bypass
* ip6-lookup
* ...
* @cliexend
*
* Example of how to disable ip6-vxlan-bypass on an interface:
* @cliexcmd{set interface ip6 vxlan-bypass GigabitEthernet2/0/0 del}
* @endparblock
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (set_interface_ip6_vxlan_bypass_command, static) = {
.path = "set interface ip6 vxlan-bypass",
.function = set_ip6_vxlan_bypass,
.short_help = "set interface ip vxlan-bypass <interface> [del]",
};
/* *INDENT-ON* */
clib_error_t *vxlan_init (vlib_main_t *vm)
{
vxlan_main_t * vxm = &vxlan_main;
vxm->vnet_main = vnet_get_main();
vxm->vlib_main = vm;
/* initialize the ip6 hash */
vxm->vxlan6_tunnel_by_key = hash_create_mem(0,
sizeof(vxlan6_tunnel_key_t),
sizeof(uword));
vxm->vtep6 = hash_create_mem(0,
sizeof(ip6_address_t),
sizeof(uword));
vxm->mcast_shared = hash_create_mem(0,
sizeof(ip46_address_t),
sizeof(mcast_shared_t));
udp_register_dst_port (vm, UDP_DST_PORT_vxlan,
vxlan4_input_node.index, /* is_ip4 */ 1);
udp_register_dst_port (vm, UDP_DST_PORT_vxlan6,
vxlan6_input_node.index, /* is_ip4 */ 0);
fib_node_register_type(FIB_NODE_TYPE_VXLAN_TUNNEL, &vxlan_vft);
return 0;
}
VLIB_INIT_FUNCTION(vxlan_init);
/*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/