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authorJohn Lo <loj@cisco.com>2017-03-24 20:11:15 -0400
committerOle Trøan <otroan@employees.org>2017-03-28 22:36:13 +0000
commit58f061dca4cb049410a72bb21a9643f7acffa738 (patch)
tree3871125ca8e4df0809f06e9fad66badce823d78f /src/vnet
parent45e526f36fb43f0b2c86d136ab563a3c5c412546 (diff)
Implement MAC Flush for BD or Interface from the L2FIB
Allow non-static MACs in the L2FIB which is associated with an interface or a bridge domain (BD) be flushed. MAC flush are initiated automatically when an interface is removed from a BD or when a BD is deleted. MAC flush can also be invoked manually via the following CLI: l2fib mac-flush interface <if-name> l2fib mac-flush bridge-domain <bd-id> Change-Id: Ie33243622834810a765f48ebcd22bdb8e8fc87a4 Signed-off-by: John Lo <loj@cisco.com>
Diffstat (limited to 'src/vnet')
-rw-r--r--src/vnet/buffer.h8
-rw-r--r--src/vnet/l2/l2_bd.c41
-rw-r--r--src/vnet/l2/l2_bd.h3
-rw-r--r--src/vnet/l2/l2_fib.c188
-rw-r--r--src/vnet/l2/l2_fib.h39
-rw-r--r--src/vnet/l2/l2_input.c14
-rw-r--r--src/vnet/l2/l2_input.h3
-rw-r--r--src/vnet/l2/l2_learn.c10
-rw-r--r--src/vnet/l2/l2_learn.h1
9 files changed, 258 insertions, 49 deletions
diff --git a/src/vnet/buffer.h b/src/vnet/buffer.h
index f08b4fc177d..ea3ce0938de 100644
--- a/src/vnet/buffer.h
+++ b/src/vnet/buffer.h
@@ -169,9 +169,11 @@ typedef struct
struct
{
u32 feature_bitmap;
- u16 bd_index; // bridge-domain index
- u8 l2_len; // ethernet header length
- u8 shg; // split-horizon group
+ u16 bd_index; /* bridge-domain index */
+ u8 l2_len; /* ethernet header length */
+ u8 shg; /* split-horizon group */
+ u8 bd_sn; /* bridge domain seq# */
+ u8 int_sn; /* interface seq# */
} l2;
/* l2tpv3 softwire encap, only valid there */
diff --git a/src/vnet/l2/l2_bd.c b/src/vnet/l2/l2_bd.c
index f741b64371f..6c01368bd92 100644
--- a/src/vnet/l2/l2_bd.c
+++ b/src/vnet/l2/l2_bd.c
@@ -115,6 +115,8 @@ bd_delete_bd_index (bd_main_t * bdm, u32 bd_id)
l2input_main.bd_configs[bd_index].bd_id = ~0;
l2input_main.bd_configs[bd_index].feature_bitmap = 0;
+ l2fib_flush_bd_mac (vlib_get_main (), bd_index);
+
return 0;
}
@@ -900,7 +902,6 @@ bd_show (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
u32 bd_index = ~0;
l2_bridge_domain_t *bd_config;
u32 start, end;
- u32 printed;
u32 detail = 0;
u32 intf = 0;
u32 arp = 0;
@@ -942,7 +943,8 @@ bd_show (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
}
/* Show all bridge-domains that have been initialized */
- printed = 0;
+ u32 printed = 0;
+ u8 *as = 0;
for (bd_index = start; bd_index < end; bd_index++)
{
bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
@@ -952,26 +954,32 @@ bd_show (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
{
printed = 1;
vlib_cli_output (vm,
- "%=5s %=7s %=10s %=10s %=10s %=10s %=10s %=14s",
- "ID", "Index", "Learning", "U-Forwrd",
- "UU-Flood", "Flooding", "ARP-Term",
+ "%=5s %=7s %=4s %=9s %=9s %=9s %=9s %=9s %=9s %=9s",
+ "ID", "Index", "BSN", "Age(min)", "Learning",
+ "U-Forwrd", "UU-Flood", "Flooding", "ARP-Term",
"BVI-Intf");
}
+ if (bd_config->mac_age)
+ as = format (as, "%d", bd_config->mac_age);
+ else
+ as = format (as, "off");
vlib_cli_output (vm,
- "%=5d %=7d %=10s %=10s %=10s %=10s %=10s %=14U",
- bd_config->bd_id, bd_index,
+ "%=5d %=7d %=4d %=9v %=9s %=9s %=9s %=9s %=9s %=9U",
+ bd_config->bd_id, bd_index, bd_config->seq_num, as,
bd_config->feature_bitmap & L2INPUT_FEAT_LEARN ?
"on" : "off",
- bd_config->feature_bitmap & L2INPUT_FEAT_FWD ? "on"
- : "off",
+ bd_config->feature_bitmap & L2INPUT_FEAT_FWD ?
+ "on" : "off",
bd_config->feature_bitmap & L2INPUT_FEAT_UU_FLOOD ?
"on" : "off",
bd_config->feature_bitmap & L2INPUT_FEAT_FLOOD ?
"on" : "off",
bd_config->feature_bitmap & L2INPUT_FEAT_ARP_TERM ?
- "on" : "off", format_vnet_sw_if_index_name_with_NA,
+ "on" : "off",
+ format_vnet_sw_if_index_name_with_NA,
vnm, bd_config->bvi_sw_if_index);
+ vec_reset_length (as);
if (detail || intf)
{
@@ -981,19 +989,21 @@ bd_show (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
{
l2_flood_member_t *member =
vec_elt_at_index (bd_config->members, i);
+ l2_input_config_t *int_config =
+ l2input_intf_config (member->sw_if_index);
u32 vtr_opr, dot1q, tag1, tag2;
if (i == 0)
{
- vlib_cli_output (vm, "\n%=30s%=7s%=5s%=5s%=9s%=30s",
- "Interface", "Index", "SHG", "BVI",
- "TxFlood", "VLAN-Tag-Rewrite");
+ vlib_cli_output (vm, "\n%=30s%=7s%=5s%=5s%=5s%=9s%=30s",
+ "Interface", "If-idx", "ISN", "SHG",
+ "BVI", "TxFlood", "VLAN-Tag-Rewrite");
}
l2vtr_get (vm, vnm, member->sw_if_index, &vtr_opr, &dot1q,
&tag1, &tag2);
- vlib_cli_output (vm, "%=30U%=7d%=5d%=5s%=9s%=30U",
+ vlib_cli_output (vm, "%=30U%=7d%=5d%=5d%=5s%=9s%=30U",
format_vnet_sw_if_index_name, vnm,
member->sw_if_index, member->sw_if_index,
- member->shg,
+ int_config->seq_num, member->shg,
member->flags & L2_FLOOD_MEMBER_BVI ? "*" :
"-", i < bd_config->flood_count ? "*" : "-",
format_vtr, vtr_opr, dot1q, tag1, tag2);
@@ -1027,6 +1037,7 @@ bd_show (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
}
}
}
+ vec_free (as);
if (!printed)
{
diff --git a/src/vnet/l2/l2_bd.h b/src/vnet/l2/l2_bd.h
index 4bb9bc9b24c..5c2502d9f9b 100644
--- a/src/vnet/l2/l2_bd.h
+++ b/src/vnet/l2/l2_bd.h
@@ -86,6 +86,9 @@ typedef struct
/* mac aging */
u8 mac_age;
+ /* sequence number for bridge domain based flush of MACs */
+ u8 seq_num;
+
} l2_bridge_domain_t;
/* Return 1 if bridge domain has been initialized */
diff --git a/src/vnet/l2/l2_fib.c b/src/vnet/l2/l2_fib.c
index d34836e33d0..fadd79ebdf6 100644
--- a/src/vnet/l2/l2_fib.c
+++ b/src/vnet/l2/l2_fib.c
@@ -168,10 +168,10 @@ show_l2fib (vlib_main_t * vm,
{
first_entry = 0;
vlib_cli_output (vm,
- "%=19s%=7s%=30s%=7s%=8s%=8s%=5s%=16s",
- "Mac Address", "BD Idx", "Interface",
- "Index", "static", "filter", "bvi",
- "Mac Age (min)");
+ "%=19s%=7s%=7s%=8s%=9s%=7s%=7s%=5s%=30s",
+ "Mac-Address", "BD-Idx", "If-Idx",
+ "BSN-ISN", "Age(min)", "static", "filter",
+ "bvi", "Interface-Name");
}
key.raw = v->kvp[k].key;
@@ -183,26 +183,27 @@ show_l2fib (vlib_main_t * vm,
bd_config = vec_elt_at_index (l2input_main.bd_configs,
key.fields.bd_index);
- if (bd_config->mac_age)
+ if (bd_config->mac_age && !result.fields.static_mac)
{
i16 delta = now - result.fields.timestamp;
delta += delta < 0 ? 256 : 0;
s = format (s, "%d", delta);
}
else
- s = format (s, "disabled");
+ s = format (s, "-");
vlib_cli_output (vm,
- "%=19U%=7d%=30U%=7d%=8d%=8d%=5d%=16v",
+ "%=19U%=7d%=7d %3d/%-3d%=9v%=7s%=7s%=5s%=30U",
format_ethernet_address, key.fields.mac,
key.fields.bd_index,
- format_vnet_sw_if_index_name_with_NA,
- msm->vnet_main, result.fields.sw_if_index,
result.fields.sw_if_index == ~0
? -1 : result.fields.sw_if_index,
- result.fields.static_mac,
- result.fields.filter,
- result.fields.bvi, s);
+ result.fields.bd_sn, result.fields.int_sn,
+ s, result.fields.static_mac ? "*" : "-",
+ result.fields.filter ? "*" : "-",
+ result.fields.bvi ? "*" : "-",
+ format_vnet_sw_if_index_name_with_NA,
+ msm->vnet_main, result.fields.sw_if_index);
vec_reset_length (s);
}
total_entries++;
@@ -330,6 +331,15 @@ l2fib_add_entry (u64 mac,
result.fields.static_mac = static_mac;
result.fields.filter = filter_mac;
result.fields.bvi = bvi_mac;
+ if (!static_mac)
+ {
+ l2_input_config_t *int_config = l2input_intf_config (sw_if_index);
+ l2_bridge_domain_t *bd_config =
+ vec_elt_at_index (l2input_main.bd_configs,
+ bd_index);
+ result.fields.int_sn = int_config->seq_num;
+ result.fields.bd_sn = bd_config->seq_num;
+ }
kv.key = key.raw;
kv.value = result.raw;
@@ -703,6 +713,141 @@ VLIB_CLI_COMMAND (l2fib_del_cli, static) = {
};
/* *INDENT-ON* */
+/**
+ Kick off ager to scan MACs to age/delete MAC entries
+*/
+void
+l2fib_start_ager_scan (vlib_main_t * vm)
+{
+ l2_bridge_domain_t *bd_config;
+ int enable = 0;
+
+ /* check if there is at least one bd with mac aging enabled */
+ vec_foreach (bd_config, l2input_main.bd_configs)
+ if (bd_config->bd_id != ~0 && bd_config->mac_age != 0)
+ enable = 1;
+
+ vlib_process_signal_event (vm, l2fib_mac_age_scanner_process_node.index,
+ enable ? L2_MAC_AGE_PROCESS_EVENT_START :
+ L2_MAC_AGE_PROCESS_EVENT_ONE_PASS, 0);
+}
+
+/**
+ Flush all learned MACs from an interface
+*/
+void
+l2fib_flush_int_mac (vlib_main_t * vm, u32 sw_if_index)
+{
+ l2_input_config_t *int_config;
+ int_config = l2input_intf_config (sw_if_index);
+ int_config->seq_num += 1;
+ l2fib_start_ager_scan (vm);
+}
+
+/**
+ Flush all learned MACs in a bridge domain
+*/
+void
+l2fib_flush_bd_mac (vlib_main_t * vm, u32 bd_index)
+{
+ l2_bridge_domain_t *bd_config;
+ vec_validate (l2input_main.bd_configs, bd_index);
+ bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
+ bd_config->seq_num += 1;
+ l2fib_start_ager_scan (vm);
+}
+
+/**
+ Flush MACs, except static ones, associated with an interface
+ The CLI format is:
+ l2fib flush-mac interface <if-name>
+*/
+static clib_error_t *
+l2fib_flush_mac_int (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ clib_error_t *error = 0;
+ u32 sw_if_index;
+
+ if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
+ {
+ error = clib_error_return (0, "unknown interface `%U'",
+ format_unformat_error, input);
+ goto done;
+ }
+
+ l2fib_flush_int_mac (vm, sw_if_index);
+
+done:
+ return error;
+}
+
+/*?
+ * This command kick off ager to delete all existing MAC Address entries,
+ * except static ones, associated with an interface from the L2 FIB table.
+ *
+ * @cliexpar
+ * Example of how to flush MAC Address entries learned on an interface from the L2 FIB table:
+ * @cliexcmd{l2fib flush-mac interface GigabitEthernet2/1/0}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (l2fib_flush_mac_int_cli, static) = {
+ .path = "l2fib flush-mac interface",
+ .short_help = "l2fib flush-mac interface <if-name>",
+ .function = l2fib_flush_mac_int,
+};
+/* *INDENT-ON* */
+
+/**
+ Flush bridge-domain MACs except static ones.
+ The CLI format is:
+ l2fib flush-mac bridge-domain <bd-id>
+*/
+static clib_error_t *
+l2fib_flush_mac_bd (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ bd_main_t *bdm = &bd_main;
+ clib_error_t *error = 0;
+ u32 bd_index, bd_id;
+ uword *p;
+
+ if (!unformat (input, "%d", &bd_id))
+ {
+ error = clib_error_return (0, "expecting bridge-domain id but got `%U'",
+ format_unformat_error, input);
+ goto done;
+ }
+
+ p = hash_get (bdm->bd_index_by_bd_id, bd_id);
+ if (p)
+ bd_index = *p;
+ else
+ return clib_error_return (0, "No such bridge domain %d", bd_id);
+
+ l2fib_flush_bd_mac (vm, bd_index);
+
+done:
+ return error;
+}
+
+/*?
+ * This command kick off ager to delete all existing MAC Address entries,
+ * except static ones, in a bridge domain from the L2 FIB table.
+ *
+ * @cliexpar
+ * Example of how to flush MAC Address entries learned in a bridge domain from the L2 FIB table:
+ * @cliexcmd{l2fib flush-mac bridge-domain 1000}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (l2fib_flush_mac_bd_cli, static) = {
+ .path = "l2fib flush-mac bridge-domain",
+ .short_help = "l2fib flush-mac bridge-domain <bd-id>",
+ .function = l2fib_flush_mac_bd,
+};
+/* *INDENT-ON* */
+
BVT (clib_bihash) * get_mac_table (void)
{
@@ -716,6 +861,7 @@ l2fib_mac_age_scanner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
{
uword event_type, *event_data = 0;
l2fib_main_t *msm = &l2fib_main;
+ l2_input_config_t *int_config;
l2_bridge_domain_t *bd_config;
BVT (clib_bihash) * h = &msm->mac_table;
clib_bihash_bucket_t *b;
@@ -747,6 +893,9 @@ l2fib_mac_age_scanner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
case L2_MAC_AGE_PROCESS_EVENT_STOP:
enabled = 0;
continue;
+ case L2_MAC_AGE_PROCESS_EVENT_ONE_PASS:
+ enabled = 0;
+ break;
default:
ASSERT (0);
}
@@ -790,8 +939,19 @@ l2fib_mac_age_scanner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
if (result.fields.static_mac)
continue;
- bd_config = vec_elt_at_index (l2input_main.bd_configs,
- key.fields.bd_index);
+ int_config =
+ l2input_intf_config (result.fields.sw_if_index);
+ bd_config =
+ vec_elt_at_index (l2input_main.bd_configs,
+ key.fields.bd_index);
+
+ if ((result.fields.int_sn != int_config->seq_num) ||
+ (result.fields.bd_sn != bd_config->seq_num))
+ {
+ void *p = &key.fields.mac;
+ l2fib_del_entry (*(u64 *) p, key.fields.bd_index);
+ continue;
+ }
if (bd_config->mac_age == 0)
continue;
diff --git a/src/vnet/l2/l2_fib.h b/src/vnet/l2/l2_fib.h
index 4a2da59bc01..7e49d74baf8 100644
--- a/src/vnet/l2/l2_fib.h
+++ b/src/vnet/l2/l2_fib.h
@@ -66,7 +66,8 @@ typedef struct
u8 filter:1; /* drop packets to/from this mac */
u8 unused1:5;
u8 timestamp; /* timestamp for aging */
- u16 unused2;
+ u8 int_sn; /* interface seq num */
+ u8 bd_sn; /* bridge domain seq num */
} fields;
u64 raw;
};
@@ -313,22 +314,28 @@ l2fib_lookup_4 (BVT (clib_bihash) * mac_table,
}
}
+void l2fib_clear_table (uint keep_static);
+
+void
+l2fib_add_entry (u64 mac,
+ u32 bd_index,
+ u32 sw_if_index, u32 static_mac, u32 drop_mac, u32 bvi_mac);
+
+u32 l2fib_del_entry (u64 mac, u32 bd_index);
+
+void l2fib_start_ager_scan (vlib_main_t * vm);
+
+void l2fib_flush_int_mac (vlib_main_t * vm, u32 sw_if_index);
+
+void l2fib_flush_bd_mac (vlib_main_t * vm, u32 bd_index);
+
+void
+l2fib_table_dump (u32 bd_index, l2fib_entry_key_t ** l2fe_key,
+ l2fib_entry_result_t ** l2fe_res);
+
+u8 *format_vnet_sw_if_index_name_with_NA (u8 * s, va_list * args);
+
BVT (clib_bihash) * get_mac_table (void);
- void
- l2fib_clear_table (uint keep_static);
- void
- l2fib_add_entry (u64 mac,
- u32 bd_index,
- u32 sw_if_index,
- u32 static_mac, u32 drop_mac, u32 bvi_mac);
-u32
-l2fib_del_entry (u64 mac, u32 bd_index);
-
- void
- l2fib_table_dump (u32 bd_index, l2fib_entry_key_t ** l2fe_key,
- l2fib_entry_result_t ** l2fe_res);
-
- u8 *format_vnet_sw_if_index_name_with_NA (u8 * s, va_list * args);
#endif
diff --git a/src/vnet/l2/l2_input.c b/src/vnet/l2/l2_input.c
index 3aa5331bf7a..041ff38d131 100644
--- a/src/vnet/l2/l2_input.c
+++ b/src/vnet/l2/l2_input.c
@@ -29,6 +29,7 @@
#include <vnet/l2/feat_bitmap.h>
#include <vnet/l2/l2_bvi.h>
#include <vnet/l2/l2_fib.h>
+#include <vnet/l2/l2_bd.h>
#include <vppinfra/error.h>
#include <vppinfra/hash.h>
@@ -201,6 +202,9 @@ classify_and_dispatch (vlib_main_t * vm,
/* Get config for the bridge domain interface */
bd_config = vec_elt_at_index (msm->bd_configs, bd_index0);
+ /* Save bridge domain seq_num */
+ vnet_buffer (b0)->l2.bd_sn = bd_config->seq_num;
+
/*
* Process bridge domain feature enables.
* To perform learning/flooding/forwarding, the corresponding bit
@@ -214,6 +218,9 @@ classify_and_dispatch (vlib_main_t * vm,
/* mask out features from bitmap using packet type and bd config */
feature_bitmap = config->feature_bitmap & feat_mask;
+ /* Save interface seq_num */
+ vnet_buffer (b0)->l2.int_sn = config->seq_num;
+
/* save for next feature graph nodes */
vnet_buffer (b0)->l2.feature_bitmap = feature_bitmap;
@@ -561,6 +568,12 @@ set_int_l2_mode (vlib_main_t * vm, vnet_main_t * vnet_main, /* */
VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
}
+
+ /* Clear MACs learned on the interface */
+ if ((config->feature_bitmap | L2INPUT_FEAT_LEARN) ||
+ (bd_config->feature_bitmap | L2INPUT_FEAT_LEARN))
+ l2fib_flush_int_mac (vm, sw_if_index);
+
l2_if_adjust--;
}
else if (config->xconnect)
@@ -632,6 +645,7 @@ set_int_l2_mode (vlib_main_t * vm, vnet_main_t * vnet_main, /* */
config->xconnect = 0;
config->bridge = 1;
config->bd_index = bd_index;
+ config->seq_num += 1;
/*
* Enable forwarding, flooding, learning and ARP termination by default
diff --git a/src/vnet/l2/l2_input.h b/src/vnet/l2/l2_input.h
index f3fada6a7d3..262f75c7e64 100644
--- a/src/vnet/l2/l2_input.h
+++ b/src/vnet/l2/l2_input.h
@@ -53,6 +53,9 @@ typedef struct
/* split horizon group */
u8 shg;
+ /* sequence number for interface based flush of MACs */
+ u8 seq_num;
+
} l2_input_config_t;
diff --git a/src/vnet/l2/l2_learn.c b/src/vnet/l2/l2_learn.c
index afe7f478f8c..faed0d6609d 100644
--- a/src/vnet/l2/l2_learn.c
+++ b/src/vnet/l2/l2_learn.c
@@ -140,7 +140,11 @@ l2learn_process (vlib_node_runtime_t * node,
counter_base[L2LEARN_ERROR_HIT] += 1;
if (PREDICT_FALSE (result0->fields.timestamp != timestamp))
result0->fields.timestamp = timestamp;
-
+ if (PREDICT_FALSE
+ (result0->fields.int_sn != vnet_buffer (b0)->l2.int_sn))
+ result0->fields.int_sn = vnet_buffer (b0)->l2.int_sn;
+ if (PREDICT_FALSE (result0->fields.bd_sn != vnet_buffer (b0)->l2.bd_sn))
+ result0->fields.bd_sn = vnet_buffer (b0)->l2.bd_sn;
}
else if (result0->raw == ~0)
{
@@ -167,6 +171,8 @@ l2learn_process (vlib_node_runtime_t * node,
result0->raw = 0; /* clear all fields */
result0->fields.sw_if_index = sw_if_index0;
result0->fields.timestamp = timestamp;
+ result0->fields.bd_sn = vnet_buffer (b0)->l2.bd_sn;
+ result0->fields.int_sn = vnet_buffer (b0)->l2.int_sn;
kv.key = key0->raw;
kv.value = result0->raw;
@@ -204,6 +210,8 @@ l2learn_process (vlib_node_runtime_t * node,
result0->raw = 0; /* clear all fields */
result0->fields.sw_if_index = sw_if_index0;
result0->fields.timestamp = timestamp;
+ result0->fields.bd_sn = vnet_buffer (b0)->l2.bd_sn;
+ result0->fields.int_sn = vnet_buffer (b0)->l2.int_sn;
kv.key = key0->raw;
kv.value = result0->raw;
diff --git a/src/vnet/l2/l2_learn.h b/src/vnet/l2/l2_learn.h
index 5bb1130b015..0d95de04b66 100644
--- a/src/vnet/l2/l2_learn.h
+++ b/src/vnet/l2/l2_learn.h
@@ -51,6 +51,7 @@ enum
{
L2_MAC_AGE_PROCESS_EVENT_START = 1,
L2_MAC_AGE_PROCESS_EVENT_STOP = 2,
+ L2_MAC_AGE_PROCESS_EVENT_ONE_PASS = 3,
} l2_mac_age_process_event_t;
#endif