+typedef struct bier_neighbor_stats_walk_t_
+{
+ vl_api_bier_neighbor_counter_t *stats;
+} bier_neighbor_stats_walk_t;
+
+static walk_rc_t
+bier_neighbor_stats_walk_cb (index_t bfmi, void *arg)
+{
+ bier_neighbor_stats_walk_t *ctx = arg;
+ vl_api_bier_neighbor_counter_t *stat;
+ fib_route_path_encode_t rpath;
+ bier_table_id_t btid;
+
+ vec_add2 (ctx->stats, stat, 1);
+
+ bier_fmask_encode (bfmi, &btid, &rpath);
+
+ stat->tbl_id.bt_set = btid.bti_set;
+ stat->tbl_id.bt_sub_domain = btid.bti_sub_domain;
+ stat->tbl_id.bt_hdr_len_id = btid.bti_hdr_len;
+ fib_api_path_encode (&rpath, &stat->path);
+ bier_fmask_get_stats (bfmi, &stat->packets, &stat->bytes);
+
+ return (WALK_CONTINUE);
+}
+
+static void
+bier_neighbor_ship (bier_neighbor_stats_walk_t * ctx)
+{
+ vl_api_vnet_bier_neighbor_counters_t *mp;
+ vl_shmem_hdr_t *shmem_hdr;
+ stats_main_t *sm;
+ api_main_t *am;
+ svm_queue_t *q;
+
+ mp = NULL;
+ sm = &stats_main;
+ am = sm->api_main;
+ shmem_hdr = am->shmem_hdr;
+ q = shmem_hdr->vl_input_queue;
+
+ /*
+ * If the walk context has counters, which may be left over from the last
+ * suspend, then we continue from there.
+ */
+ while (0 != vec_len (ctx->stats))
+ {
+ u32 n_items = MIN (vec_len (ctx->stats),
+ BIER_NEIGHBOR_COUNTER_BATCH_SIZE);
+ u8 pause = 0;
+
+ dslock (sm, 0 /* release hint */ , 1 /* tag */ );
+
+ mp = vl_msg_api_alloc_as_if_client (sizeof (*mp) +
+ (n_items *
+ sizeof
+ (vl_api_bier_neighbor_counter_t)));
+ mp->_vl_msg_id = ntohs (VL_API_VNET_BIER_NEIGHBOR_COUNTERS);
+ mp->count = ntohl (n_items);
+
+ /*
+ * copy the counters from the back of the context, then we can easily
+ * 'erase' them by resetting the vector length.
+ * The order we push the stats to the caller is not important.
+ */
+ clib_memcpy (mp->c,
+ &ctx->stats[vec_len (ctx->stats) - n_items],
+ n_items * sizeof (*ctx->stats));
+
+ _vec_len (ctx->stats) = vec_len (ctx->stats) - n_items;
+
+ /*
+ * send to the shm q
+ */
+ send_and_pause (sm, q, (u8 *) & mp);
+ }
+}
+
+static void
+do_bier_neighbor_counters (stats_main_t * sm)
+{
+ vl_api_bier_neighbor_counter_t *stat;
+
+ bier_neighbor_stats_walk_t ctx = {
+ .stats = NULL,
+ };
+
+ dslock (sm, 0 /* release hint */ , 1 /* tag */ );
+ bier_fmask_db_walk (bier_neighbor_stats_walk_cb, &ctx);
+ dsunlock (sm);
+
+ bier_neighbor_ship (&ctx);
+}
+