BIER neighbor stats

Change-Id: I2f638f1932b4aeddf2408c06d1b8393551675b72
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>

5 files changed, 124 insertions, 29 deletions

diff --git a/src/vnet/bier/bier_fmask.c b/src/vnet/bier/bier_fmask.c
index 3d7cc838ab0..73f719460aa 100644
--- a/src/vnet/bier/bier_fmask.c
+++ b/src/vnet/bier/bier_fmask.c
@@ -37,6 +37,11 @@ static const char *const bier_fmask_attr_names[] = BIER_FMASK_ATTR_NAMES;
  */
 bier_fmask_t *bier_fmask_pool;
 
+/**
+ * Stats for each BIER fmask object
+ */
+vlib_combined_counter_main_t bier_fmask_counters;
+
 static inline index_t
 bier_fmask_get_index (const bier_fmask_t *bfm)
 {
@@ -165,6 +170,12 @@ bier_fmask_init (bier_fmask_t *bfm,
     const bier_table_id_t *btid;
     mpls_label_t olabel;
 
+    ASSERT(1 == vec_len(rpaths));
+    memset(bfm, 0, sizeof(*bfm));
+
+    bfm->bfm_id = clib_mem_alloc(sizeof(*bfm->bfm_id));
+
+    fib_node_init(&bfm->bfm_node, FIB_NODE_TYPE_BIER_FMASK);
     *bfm->bfm_id = *fmid;
     dpo_reset(&bfm->bfm_dpo);
     btid = bier_table_get_id(bfm->bfm_id->bfmi_bti);
@@ -268,20 +279,19 @@ bier_fmask_create_and_lock (const bier_fmask_id_t *fmid,
                             const fib_route_path_t *rpaths)
 {
     bier_fmask_t *bfm;
+    index_t bfmi;
 
     pool_get_aligned(bier_fmask_pool, bfm, CLIB_CACHE_LINE_BYTES);
+    bfmi = bier_fmask_get_index(bfm);
 
-    memset(bfm, 0, sizeof(*bfm));
-
-    bfm->bfm_id = clib_mem_alloc(sizeof(*bfm->bfm_id));
+    vlib_validate_combined_counter (&(bier_fmask_counters), bfmi);
+    vlib_zero_combined_counter (&(bier_fmask_counters), bfmi);
 
-    ASSERT(1 == vec_len(rpaths));
-    fib_node_init(&bfm->bfm_node, FIB_NODE_TYPE_BIER_FMASK);
     bier_fmask_init(bfm, fmid, rpaths);
 
-    bier_fmask_lock(bier_fmask_get_index(bfm));
+    bier_fmask_lock(bfmi);
 
-    return (bier_fmask_get_index(bfm));
+    return (bfmi);
 }
 
 void
@@ -331,6 +341,7 @@ format_bier_fmask (u8 *s, va_list *ap)
     u32 indent = va_arg(*ap, u32);
     bier_fmask_attributes_t attr;
     bier_fmask_t *bfm;
+    vlib_counter_t to;
 
     if (pool_is_free_index(bier_fmask_pool, bfmi))
     {
@@ -349,6 +360,8 @@ format_bier_fmask (u8 *s, va_list *ap)
             s = format (s, "%s,", bier_fmask_attr_names[attr]);
         }
     }
+    vlib_get_combined_counter (&(bier_fmask_counters), bfmi, &to);
+    s = format (s, " to:[%Ld:%Ld]]", to.packets, to.bytes);
     s = format(s, "\n");
     s = fib_path_list_format(bfm->bfm_pl, s);
 
@@ -371,6 +384,43 @@ format_bier_fmask (u8 *s, va_list *ap)
     return (s);
 }
 
+void
+bier_fmask_get_stats (index_t bfmi, u64 * packets, u64 * bytes)
+{
+  vlib_counter_t to;
+
+  vlib_get_combined_counter (&(bier_fmask_counters), bfmi, &to);
+
+  *packets = to.packets;
+  *bytes = to.bytes;
+}
+
+void
+bier_fmask_encode (index_t bfmi,
+                   bier_table_id_t *btid,
+                   fib_route_path_encode_t *rpath)
+{
+    bier_fmask_t *bfm;
+
+    bfm = bier_fmask_get(bfmi);
+    *btid = *bier_table_get_id(bfm->bfm_id->bfmi_bti);
+
+    memset(rpath, 0, sizeof(*rpath));
+
+    rpath->rpath.frp_sw_if_index = ~0;
+
+    switch (bfm->bfm_id->bfmi_nh_type)
+    {
+    case BIER_NH_UDP:
+        rpath->rpath.frp_flags = FIB_ROUTE_PATH_UDP_ENCAP;
+        rpath->rpath.frp_udp_encap_id = bfm->bfm_id->bfmi_id;
+        break;
+    case BIER_NH_IP:
+        memcpy(&rpath->rpath.frp_addr, &bfm->bfm_id->bfmi_nh,
+               sizeof(rpath->rpath.frp_addr));
+        break;
+    }
+}
 
 static fib_node_t *
 bier_fmask_get_node (fib_node_index_t index)
diff --git a/src/vnet/bier/bier_fmask.h b/src/vnet/bier/bier_fmask.h
index 56930f6cd44..0666605c23f 100644
--- a/src/vnet/bier/bier_fmask.h
+++ b/src/vnet/bier/bier_fmask.h
@@ -163,6 +163,10 @@ extern u32 bier_fmask_child_add (fib_node_index_t fib_entry_index,
                                  fib_node_index_t child_index);
 extern void bier_fmask_child_remove (fib_node_index_t fib_entry_index,
                                      u32 sibling_index);
+extern void bier_fmask_get_stats (index_t bfmi, u64 * packets, u64 * bytes);
+extern void bier_fmask_encode (index_t bfmi,
+                               bier_table_id_t *btid,
+                               fib_route_path_encode_t *rpath);
 
 /*
  * provided for fast data-path access
diff --git a/src/vnet/bier/bier_fmask_db.c b/src/vnet/bier/bier_fmask_db.c
index 67d3bd1cf85..59e2973b589 100644
--- a/src/vnet/bier/bier_fmask_db.c
+++ b/src/vnet/bier/bier_fmask_db.c
@@ -31,7 +31,7 @@ typedef struct bier_fmask_db_t_ {
     /**
      * hash table for underlying storage
      */
-    mhash_t bfdb_hash;
+    uword *bfdb_hash;
 
     /**
      * Pool for memory
@@ -68,11 +68,12 @@ bier_fmask_db_mk_key (index_t bti,
     if (FIB_ROUTE_PATH_UDP_ENCAP & rpath->frp_flags)
     {
         key->bfmi_id = rpath->frp_udp_encap_id;
+        key->bfmi_nh_type = BIER_NH_UDP;
     }
     else
     {
-        key->bfmi_sw_if_index = rpath->frp_sw_if_index;
         memcpy(&key->bfmi_nh, &rpath->frp_addr, sizeof(rpath->frp_addr));
+        key->bfmi_nh_type = BIER_NH_IP;
     }
     if (NULL == rpath->frp_label_stack)
     {
@@ -82,6 +83,7 @@ bier_fmask_db_mk_key (index_t bti,
     {
         key->bfmi_hdr_type = BIER_HDR_O_MPLS;
     }
+    key->bfmi_bti = bti;
 }
 
 u32
@@ -92,7 +94,7 @@ bier_fmask_db_find (index_t bti,
     uword *p;
 
     bier_fmask_db_mk_key(bti, rpath, &fmid);
-    p = mhash_get(&bier_fmask_db.bfdb_hash, &fmid);
+    p = hash_get_mem(bier_fmask_db.bfdb_hash, &fmid);
 
     if (NULL != p)
     {
@@ -111,7 +113,7 @@ bier_fmask_db_find_or_create_and_lock (index_t bti,
     uword *p;
 
     bier_fmask_db_mk_key(bti, rpath, &fmid);
-    p = mhash_get(&bier_fmask_db.bfdb_hash, &fmid);
+    p = hash_get_mem(bier_fmask_db.bfdb_hash, &fmid);
 
     if (NULL == p)
     {
@@ -121,7 +123,7 @@ bier_fmask_db_find_or_create_and_lock (index_t bti,
          */
         index = bier_fmask_create_and_lock(&fmid, rpath);
         bfm = bier_fmask_get(index);
-        mhash_set(&bier_fmask_db.bfdb_hash, bfm->bfm_id, index, 0);
+        hash_set_mem(bier_fmask_db.bfdb_hash, bfm->bfm_id, index);
     }
     else
     {
@@ -137,7 +139,7 @@ bier_fmask_db_remove (const bier_fmask_id_t *fmid)
 {
     uword *p;
 
-    p = mhash_get(&bier_fmask_db.bfdb_hash, fmid);
+    p = hash_get_mem(bier_fmask_db.bfdb_hash, fmid);
 
     if (NULL == p) {
         /*
@@ -145,16 +147,29 @@ bier_fmask_db_remove (const bier_fmask_id_t *fmid)
          */
         ASSERT (!"remove non-existant fmask");
     } else {
-        mhash_unset(&(bier_fmask_db.bfdb_hash), (void*)fmid, 0);
+        hash_unset(bier_fmask_db.bfdb_hash, fmid);
     }
 }
 
+void
+bier_fmask_db_walk (bier_fmask_walk_fn_t fn, void *ctx)
+{
+    CLIB_UNUSED (bier_fmask_id_t *fmid);
+    uword *bfmi;
+
+    hash_foreach(fmid, bfmi, bier_fmask_db.bfdb_hash,
+    ({
+        if (WALK_STOP == fn(*bfmi, ctx))
+            break;
+    }));
+}
+
 clib_error_t *
 bier_fmask_db_module_init (vlib_main_t *vm)
 {
-    mhash_init(&bier_fmask_db.bfdb_hash,
-               sizeof(index_t),
-               sizeof(bier_fmask_id_t));
+    bier_fmask_db.bfdb_hash = hash_create_mem(0,
+                                              sizeof(bier_fmask_id_t),
+                                              sizeof(index_t));
 
     return (NULL);
 }
diff --git a/src/vnet/bier/bier_fmask_db.h b/src/vnet/bier/bier_fmask_db.h
index a7f29c2b6a6..36e555f8680 100644
--- a/src/vnet/bier/bier_fmask_db.h
+++ b/src/vnet/bier/bier_fmask_db.h
@@ -36,23 +36,28 @@ typedef enum bier_hdr_type_t_ {
      * BIER header in non-MPLS networks
      */
     BIER_HDR_O_OTHER,
-} bier_hdr_type_t;
+} __attribute__((packed)) bier_hdr_type_t;
 
 /**
- * A key/ID for a BIER forwarding Mas (FMask).
- * This is a simplified version of a fib_route_path_t.
+ * BIER next-hop type
  */
-typedef struct bier_fmask_id_t_ {
+typedef enum bier_nh_type_t_ {
     /**
-     * Type of BIER header this fmask supports
+     * BIER Header in MPLS networks
      */
-    bier_hdr_type_t bfmi_hdr_type;
+    BIER_NH_IP,
 
     /**
-     * The BIER table this fmask is in
+     * BIER header in non-MPLS networks
      */
-    index_t bfmi_bti;
+    BIER_NH_UDP,
+} __attribute__((packed)) bier_nh_type_t;
 
+/**
+ * A key/ID for a BIER forwarding Mas (FMask).
+ * This is a simplified version of a fib_route_path_t.
+ */
+typedef struct bier_fmask_id_t_ {
     union {
         /**
          * next-hop of the peer
@@ -64,11 +69,20 @@ typedef struct bier_fmask_id_t_ {
          */
         u32 bfmi_id;
     };
+    /**
+     * The BIER table this fmask is in
+     */
+    index_t bfmi_bti;
 
     /**
-     * Software interface index
+     * Type of BIER header this fmask supports
      */
-    u32 bfmi_sw_if_index;
+    bier_hdr_type_t bfmi_hdr_type;
+
+    /**
+     * Union discriminatrr
+     */
+    bier_nh_type_t bfmi_nh_type;
 } __attribute__((packed)) bier_fmask_id_t;
 
 extern index_t
@@ -79,5 +93,11 @@ extern index_t bier_fmask_db_find (index_t bti,
 
 extern void bier_fmask_db_remove (const bier_fmask_id_t *fmid);
 
+/**
+ * Walk all the BIER fmasks
+ */
+typedef walk_rc_t (*bier_fmask_walk_fn_t) (index_t bfmi, void *ctx);
+
+extern void bier_fmask_db_walk(bier_fmask_walk_fn_t fn, void *ctx);
 
 #endif
diff --git a/src/vnet/bier/bier_output.c b/src/vnet/bier/bier_output.c
index 01eeffe475c..7f513fc7b48 100644
--- a/src/vnet/bier/bier_output.c
+++ b/src/vnet/bier/bier_output.c
@@ -49,6 +49,7 @@ typedef enum {
  * Forward declaration
  */
 vlib_node_registration_t bier_output_node;
+extern vlib_combined_counter_main_t bier_fmask_counters;
 
 /**
  * @brief Packet trace recoed for a BIER output
@@ -64,13 +65,14 @@ bier_output (vlib_main_t * vm,
              vlib_node_runtime_t * node,
              vlib_frame_t * from_frame)
 {
+  vlib_combined_counter_main_t *cm = &bier_fmask_counters;
     u32 n_left_from, next_index, * from, * to_next;
+    u32 thread_index;
 
+    thread_index = vlib_get_thread_index ();
     from = vlib_frame_vector_args (from_frame);
     n_left_from = from_frame->n_vectors;
 
-    // vnet_buffer(b0)->sw_if_index[VLIB_TX] = d0->tx_fib_index;
-
     /*
      * objection your honour! speculation!
      */
@@ -112,6 +114,10 @@ bier_output (vlib_main_t * vm,
             bfmi0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
             bfm0 = bier_fmask_get(bfmi0);
 
+            vlib_increment_combined_counter(
+                cm, thread_index, bfmi0, 1,
+                vlib_buffer_length_in_chain (vm, b0));
+
             /*
              * perform the logical AND of the packet's mask with
              * that of the fmask objects, to reset the bits that