Include allocated table memory in 'sh fib mem' output

DBGvpp# sh fib mem
FIB memory
  Tables:
             SAFI              Number   Bytes
         IPv4 unicast             2    673066
         IPv6 unicast             2    1054608
             MPLS                 1    4194312
        IPv4 multicast            2     2322
        IPv6 multicast            2      ???
  Nodes:
             Name               Size  in-use /allocated   totals
             Entry               96     20   /    20      1920/1920
         Entry Source            32      0   /    0       0/0
     Entry Path-Extensions       60      0   /    0       0/0
        multicast-Entry         192     12   /    12      2304/2304
           Path-list             40     28   /    28      1120/1120
           uRPF-list             16     20   /    20      320/320
             Path                72     28   /    28      2016/2016
      Node-list elements         20     28   /    28      560/560
        Node-list heads          8      30   /    30      240/240

Change-Id: I8c8f6f1c87502a40265bf4f302d0daef111a4a4e
Signed-off-by: Neale Ranns <nranns@cisco.com>
diff --git a/src/vnet/mfib/ip6_mfib.c b/src/vnet/mfib/ip6_mfib.c
index e486133..1c1f5db 100644
--- a/src/vnet/mfib/ip6_mfib.c
+++ b/src/vnet/mfib/ip6_mfib.c
@@ -472,6 +472,16 @@
 
 VLIB_INIT_FUNCTION(ip6_mfib_module_init);
 
+u8 *
+format_ip6_mfib_table_memory (u8 * s, va_list * args)
+{
+    s = format(s, "%=30s %=6d %=8s\n",
+               "IPv6 multicast",
+               pool_elts(ip6_main.mfibs), "???");
+
+    return (s);
+}
+
 static void
 ip6_mfib_table_show_one (ip6_mfib_t *mfib,
                          vlib_main_t * vm,
@@ -566,7 +576,7 @@
                unformat_input_t * input,
                vlib_cli_command_t * cmd)
 {
-    ip6_main_t * im4 = &ip6_main;
+    ip6_main_t * im6 = &ip6_main;
     mfib_table_t *mfib_table;
     int verbose, matching;
     ip6_address_t grp, src = {{0}};
@@ -608,7 +618,7 @@
             break;
     }
 
-    pool_foreach (mfib_table, im4->mfibs,
+    pool_foreach (mfib_table, im6->mfibs,
     ({
         ip6_mfib_t *mfib = &mfib_table->v6;
 
@@ -649,7 +659,7 @@
 }
 
 /*
- * This command displays the IPv4 MulticasrFIB Tables (VRF Tables) and
+ * This command displays the IPv6 MulticasrFIB Tables (VRF Tables) and
  * the route entries for each table.
  *
  * @note This command will run for a long time when the FIB tables are
@@ -657,9 +667,9 @@
  * a single table or summary mode.
  *
  * @cliexpar
- * Example of how to display all the IPv4 Multicast FIB tables:
+ * Example of how to display all the IPv6 Multicast FIB tables:
  * @cliexstart{show ip fib}
- * ipv4-VRF:0, fib_index 0
+ * ipv6-VRF:0, fib_index 0
  * (*, 0.0.0.0/0):  flags:D,
  *  Interfaces:
  *  multicast-ip6-chain
@@ -671,18 +681,18 @@
  *  test-eth0: Accept,
  * multicast-ip6-chain
  * [@2]: dpo-replicate: [index:1 buckets:2 to:[0:0]]
- *   [0] [@1]: ipv4-mcast: test-eth1: IP6: d0:d1:d2:d3:d4:01 -> 01:00:05:00:00:00
- *   [1] [@1]: ipv4-mcast: test-eth2: IP6: d0:d1:d2:d3:d4:02 -> 01:00:05:00:00:00
+ *   [0] [@1]: ipv6-mcast: test-eth1: IP6: d0:d1:d2:d3:d4:01 -> 01:00:05:00:00:00
+ *   [1] [@1]: ipv6-mcast: test-eth2: IP6: d0:d1:d2:d3:d4:02 -> 01:00:05:00:00:00
  *
  * @cliexend
- * Example of how to display a summary of all IPv4 FIB tables:
+ * Example of how to display a summary of all IPv6 FIB tables:
  * @cliexstart{show ip fib summary}
- * ipv4-VRF:0, fib_index 0, flow hash: src dst sport dport proto
+ * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
  *     Prefix length         Count
  *                    0               1
  *                    8               2
  *                   32               4
- * ipv4-VRF:7, fib_index 1, flow hash: src dst sport dport proto
+ * ipv6-VRF:7, fib_index 1, flow hash: src dst sport dport proto
  *     Prefix length         Count
  *                    0               1
  *                    8               2