Add sw_interface_clear_stats API call

Change-Id: I0731357744ddcb890efaebd81aac5370449a90e3
Signed-off-by: Pavel Kotucek <pkotucek@cisco.com>

4 files changed, 134 insertions, 6 deletions

diff --git a/vpp-api-test/vat/api_format.c b/vpp-api-test/vat/api_format.c
index b6f09021d5b..50153fe3202 100644
--- a/vpp-api-test/vat/api_format.c
+++ b/vpp-api-test/vat/api_format.c
@@ -620,7 +620,7 @@ static void vl_api_sw_interface_set_flags_t_handler_json
     /* JSON output not supported */
 }
 
-static void vl_api_cli_reply_t_handler 
+static void vl_api_cli_reply_t_handler
 (vl_api_cli_reply_t * mp)
 {
     vat_main_t * vam = &vat_main;
@@ -1896,7 +1896,8 @@ _(map_add_del_rule_reply)                               \
 _(want_interface_events_reply)                          \
 _(want_stats_reply)					\
 _(cop_interface_enable_disable_reply)			\
-_(cop_whitelist_enable_disable_reply)
+_(cop_whitelist_enable_disable_reply)                   \
+_(sw_interface_clear_stats_reply)
 
 #define _(n)                                    \
     static void vl_api_##n##_t_handler          \
@@ -2049,7 +2050,8 @@ _(WANT_STATS_REPLY, want_stats_reply)					\
 _(GET_FIRST_MSG_ID_REPLY, get_first_msg_id_reply)    			\
 _(COP_INTERFACE_ENABLE_DISABLE_REPLY, cop_interface_enable_disable_reply) \
 _(COP_WHITELIST_ENABLE_DISABLE_REPLY, cop_whitelist_enable_disable_reply) \
-_(GET_NODE_GRAPH_REPLY, get_node_graph_reply)
+_(GET_NODE_GRAPH_REPLY, get_node_graph_reply)                           \
+_(SW_INTERFACE_CLEAR_STATS_REPLY, sw_interface_clear_stats_reply)
 
 /* M: construct, but don't yet send a message */
 
@@ -2670,6 +2672,39 @@ static int api_sw_interface_set_flags (vat_main_t * vam)
     W;
 }
 
+static int api_sw_interface_clear_stats (vat_main_t * vam)
+{
+    unformat_input_t * i = vam->input;
+    vl_api_sw_interface_clear_stats_t *mp;
+    f64 timeout;
+    u32 sw_if_index;
+    u8 sw_if_index_set = 0;
+
+    /* Parse args required to build the message */
+    while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT) {
+        if (unformat (i, "%U", unformat_sw_if_index, vam, &sw_if_index))
+            sw_if_index_set = 1;
+        else if (unformat (i, "sw_if_index %d", &sw_if_index))
+            sw_if_index_set = 1;
+        else
+            break;
+    }
+
+    /* Construct the API message */
+    M(SW_INTERFACE_CLEAR_STATS, sw_interface_clear_stats);
+
+    if (sw_if_index_set == 1)
+        mp->sw_if_index = ntohl (sw_if_index);
+    else
+    	mp->sw_if_index = ~0;
+
+    /* send it... */
+    S;
+
+    /* Wait for a reply, return the good/bad news... */
+    W;
+}
+
 static int api_sw_interface_add_del_address (vat_main_t * vam)
 {
     unformat_input_t * i = vam->input;
@@ -9064,7 +9099,8 @@ _(get_first_msg_id, "client <name>")					\
 _(cop_interface_enable_disable, "<intfc> | sw_if_index <nn> [disable]") \
 _(cop_whitelist_enable_disable, "<intfc> | sw_if_index <nn>\n"		\
   "fib-id <nn> [ip4][ip6][default]")					\
-_(get_node_graph, " ")
+_(get_node_graph, " ")                                                  \
+_(sw_interface_clear_stats,"<intfc> | sw_if_index <nn>")
 
 /* List of command functions, CLI names map directly to functions */
 #define foreach_cli_function                                    \
diff --git a/vpp/api/api.c b/vpp/api/api.c
index 2c0b4b3c013..40cfa27bb11 100644
--- a/vpp/api/api.c
+++ b/vpp/api/api.c
@@ -311,7 +311,8 @@ _(MAP_RULE_DUMP, map_rule_dump)						\
 _(MAP_SUMMARY_STATS, map_summary_stats)					\
 _(COP_INTERFACE_ENABLE_DISABLE, cop_interface_enable_disable)		\
 _(COP_WHITELIST_ENABLE_DISABLE, cop_whitelist_enable_disable)		\
-_(GET_NODE_GRAPH, get_node_graph)
+_(GET_NODE_GRAPH, get_node_graph)                                       \
+_(SW_INTERFACE_CLEAR_STATS, sw_interface_clear_stats)
 
 #define QUOTE_(x) #x
 #define QUOTE(x) QUOTE_(x)
@@ -2351,6 +2352,64 @@ static void vl_api_sw_interface_set_flags_t_handler (
    REPLY_MACRO(VL_API_SW_INTERFACE_SET_FLAGS_REPLY);
 }
 
+static void vl_api_sw_interface_clear_stats_t_handler (
+    vl_api_sw_interface_clear_stats_t * mp)
+{
+   vl_api_sw_interface_clear_stats_reply_t *rmp;
+
+   vnet_main_t * vnm = vnet_get_main();
+   vnet_interface_main_t * im = &vnm->interface_main;
+   vlib_simple_counter_main_t * sm;
+   vlib_combined_counter_main_t * cm;
+   static vnet_main_t ** my_vnet_mains;
+   int i, j, n_counters;
+
+   int rv = 0;
+
+   vec_reset_length (my_vnet_mains);
+
+   for (i = 0; i < vec_len (vnet_mains); i++)
+     {
+       if (vnet_mains[i])
+         vec_add1 (my_vnet_mains, vnet_mains[i]);
+     }
+
+   if (vec_len (vnet_mains) == 0)
+     vec_add1 (my_vnet_mains, vnm);
+
+   n_counters = vec_len (im->combined_sw_if_counters);
+
+   for (j = 0; j < n_counters; j++)
+     {
+       for (i = 0; i < vec_len(my_vnet_mains); i++)
+         {
+           im = &my_vnet_mains[i]->interface_main;
+           cm = im->combined_sw_if_counters + j;
+           if (mp->sw_if_index == (u32)~0)
+             vlib_clear_combined_counters (cm);
+           else
+             vlib_zero_combined_counter (cm, ntohl(mp->sw_if_index));
+         }
+     }
+
+   n_counters = vec_len (im->sw_if_counters);
+
+   for (j = 0; j < n_counters; j++)
+     {
+       for (i = 0; i < vec_len(my_vnet_mains); i++)
+         {
+           im = &my_vnet_mains[i]->interface_main;
+           sm = im->sw_if_counters + j;
+           if (mp->sw_if_index == (u32)~0)
+             vlib_clear_simple_counters (sm);
+           else
+             vlib_zero_simple_counter (sm, ntohl(mp->sw_if_index));
+         }
+     }
+
+   REPLY_MACRO(VL_API_SW_INTERFACE_CLEAR_STATS_REPLY);
+}
+
 static void send_sw_interface_details (vpe_api_main_t * am,
                                        unix_shared_memory_queue_t *q,
                                        vnet_sw_interface_t * swif,
diff --git a/vpp/api/custom_dump.c b/vpp/api/custom_dump.c
index 6a402ead744..6bdbdc55803 100644
--- a/vpp/api/custom_dump.c
+++ b/vpp/api/custom_dump.c
@@ -1727,6 +1727,18 @@ static void * vl_api_cop_whitelist_enable_disable_t_print
     FINISH;
 }
 
+static void *vl_api_sw_interface_clear_stats_t_print
+(vl_api_sw_interface_clear_stats_t * mp, void *handle)
+{
+    u8 * s;
+
+    s = format (0, "SCRIPT: sw_interface_clear_stats ");
+    if (mp->sw_if_index != ~0)
+      s = format (s, "sw_if_index %d ", ntohl(mp->sw_if_index));
+
+    FINISH;
+}
+
 #define foreach_custom_print_function                                   \
 _(CREATE_LOOPBACK, create_loopback)                                     \
 _(SW_INTERFACE_SET_FLAGS, sw_interface_set_flags)                       \
@@ -1808,7 +1820,8 @@ _(IP_DUMP, ip_dump)                                                     \
 _(DELETE_LOOPBACK, delete_loopback)                                     \
 _(BD_IP_MAC_ADD_DEL, bd_ip_mac_add_del)					\
 _(COP_INTERFACE_ENABLE_DISABLE, cop_interface_enable_disable) 		\
-_(COP_WHITELIST_ENABLE_DISABLE, cop_whitelist_enable_disable)
+_(COP_WHITELIST_ENABLE_DISABLE, cop_whitelist_enable_disable)           \
+_(SW_INTERFACE_CLEAR_STATS, sw_interface_clear_stats)
 
 void vl_msg_api_custom_dump_configure (api_main_t *am) 
 {
diff --git a/vpp/api/vpe.api b/vpp/api/vpe.api
index 2af4f503e8f..29cd1badcbc 100644
--- a/vpp/api/vpe.api
+++ b/vpp/api/vpe.api
@@ -2842,3 +2842,23 @@ define get_node_graph_reply {
     i32 retval;
     u64 reply_in_shmem;
 };
+
+/** \brief Clear interface statistics
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param sw_if_index - index of the interface to clear statistics
+*/
+define sw_interface_clear_stats {
+    u32 client_index;
+    u32 context;
+    u32 sw_if_index;
+};
+
+/** \brief Reply to sw_interface_clear_stats 
+    @param context - sender context which was passed in the request
+    @param retval - return code of the set flags request
+*/
+define sw_interface_clear_stats_reply {
+    u32 context;
+    i32 retval;
+};