VXLAN: Allow user to specify a custom vxlan tunnel instance id.
If one is not selected by the user, the next available id
will be allocated, thus maintaining backward compatibility.
Change-Id: I4691ed0638b8072f9cfa9f20b9fe4f981e708800
Signed-off-by: Jon Loeliger <jdl@netgate.com>
diff --git a/src/vnet/vxlan/vxlan.c b/src/vnet/vxlan/vxlan.c
index 64936c0..2684462 100644
--- a/src/vnet/vxlan/vxlan.c
+++ b/src/vnet/vxlan/vxlan.c
@@ -55,9 +55,16 @@
{
vxlan_tunnel_t * t = va_arg (*args, vxlan_tunnel_t *);
vxlan_main_t * ngm = &vxlan_main;
+ u32 dev_instance;
+ u32 user_instance;
- s = format (s, "[%d] src %U dst %U vni %d fib-idx %d sw-if-idx %d ",
- t - ngm->tunnels,
+ dev_instance = t - ngm->tunnels;
+ user_instance = t->user_instance;
+
+ s = format (s,
+ "[%d] instance %d src %U dst %U vni %d fib-idx %d sw-if-idx %d ",
+ dev_instance,
+ 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);
@@ -76,7 +83,18 @@
static u8 * format_vxlan_name (u8 * s, va_list * args)
{
u32 dev_instance = va_arg (*args, u32);
- return format (s, "vxlan_tunnel%d", dev_instance);
+ 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 *
@@ -89,9 +107,16 @@
return /* no error */ 0;
}
+static int
+vxlan_name_renumber (vnet_hw_interface_t *hi, u32 new_dev_instance)
+{
+ return 0;
+}
+
VNET_DEVICE_CLASS (vxlan_device_class,static) = {
.name = "VXLAN",
.format_device_name = format_vxlan_name,
+ .name_renumber = vxlan_name_renumber,
.format_tx_trace = format_vxlan_encap_trace,
.admin_up_down_function = vxlan_interface_admin_up_down,
};
@@ -348,10 +373,12 @@
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)
@@ -365,7 +392,8 @@
pool_get_aligned (vxm->tunnels, t, CLIB_CACHE_LINE_BYTES);
memset (t, 0, sizeof (*t));
-
+ dev_instance = t - vxm->tunnels;
+
/* copy from arg structure */
#define _(x) t->x = a->x;
foreach_copy_field;
@@ -378,6 +406,22 @@
return rv;
}
+ /*
+ * 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,
@@ -394,11 +438,13 @@
_vec_len (vxm->free_vxlan_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;
+ hi->dev_instance = dev_instance;
+ hi->hw_instance = dev_instance;
+
+ sw_if_index = hi->sw_if_index;
+ vnet_interface_name_renumber(sw_if_index, user_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);
@@ -425,7 +471,7 @@
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;
+ 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);
@@ -455,7 +501,7 @@
(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, t - vxm->tunnels);
+ (t->fib_entry_index, FIB_NODE_TYPE_VXLAN_TUNNEL, dev_instance);
vxlan_tunnel_restack_dpo(t);
}
else
@@ -538,18 +584,19 @@
if (!p)
return VNET_API_ERROR_NO_SUCH_ENTRY;
- t = pool_elt_at_index (vxm->tunnels, p[0]);
+ 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, t->sw_if_index, 0 /* down */);
- vnet_sw_interface_t * si = vnet_get_sw_interface (vnm, t->sw_if_index);
+ vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */);
+ vnet_sw_interface_t * si = vnet_get_sw_interface (vnm, 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);
+ set_int_l2_mode(vxm->vlib_main, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0);
vec_add1 (vxm->free_vxlan_tunnel_hw_if_indices, t->hw_if_index);
- vxm->tunnel_index_by_sw_if_index[t->sw_if_index] = ~0;
+ vxm->tunnel_index_by_sw_if_index[sw_if_index] = ~0;
if (!is_ip6)
hash_unset (vxm->vxlan4_tunnel_by_key, key4.as_u64);
@@ -567,6 +614,12 @@
mcast_shared_remove(&t->dst);
}
+ vnet_hw_interface_t *hi;
+ hi = vnet_get_hw_interface (vnm, t->hw_if_index);
+ hi->dev_instance = ~0;
+
+ hash_unset (vxlan_main.instance_used, instance);
+
fib_node_deinit(&t->node);
vec_free (t->rewrite);
pool_put (vxm->tunnels, t);
@@ -621,6 +674,7 @@
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;
@@ -644,6 +698,8 @@
{
is_add = 0;
}
+ else if (unformat (line_input, "instance %d", &instance))
+ ;
else if (unformat (line_input, "src %U",
unformat_ip4_address, &src.ip4))
{
@@ -770,11 +826,12 @@
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)
@@ -793,6 +850,14 @@
error = clib_error_return (0, "tunnel does not exist...");
goto done;
+ case VNET_API_ERROR_INVALID_ARGUMENT:
+ error = clib_error_return (0, "Invalid argument");
+ 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);
@@ -822,6 +887,8 @@
* @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}
?*/
@@ -831,6 +898,7 @@
.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,
};
@@ -1075,3 +1143,9 @@
}
VLIB_INIT_FUNCTION(vxlan_init);
+
+/*
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */