Reorganize source tree to use single autotools instance

Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 784 insertions, 0 deletions

diff --git a/src/vnet/fib/ip6_fib.c b/src/vnet/fib/ip6_fib.c
new file mode 100644
index 00000000000..d5b9bdcbd52
--- /dev/null
+++ b/src/vnet/fib/ip6_fib.c
@@ -0,0 +1,784 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/fib/ip6_fib.h>
+#include <vnet/fib/fib_table.h>
+
+static void
+vnet_ip6_fib_init (u32 fib_index)
+{
+    fib_prefix_t pfx = {
+	.fp_proto = FIB_PROTOCOL_IP6,
+	.fp_len = 0,
+	.fp_addr = {
+	    .ip6 = {
+		{ 0, 0, },
+	    },
+	}
+    };
+
+    /*
+     * Add the default route.
+     */
+    fib_table_entry_special_add(fib_index,
+				&pfx,
+				FIB_SOURCE_DEFAULT_ROUTE,
+				FIB_ENTRY_FLAG_DROP,
+				ADJ_INDEX_INVALID);
+
+    /*
+     * Add ff02::1:ff00:0/104 via local route for all tables.
+     *  This is required for neighbor discovery to work.
+     */
+    ip6_set_solicited_node_multicast_address(&pfx.fp_addr.ip6, 0);
+    pfx.fp_len = 104;
+    fib_table_entry_special_add(fib_index,
+				&pfx,
+				FIB_SOURCE_SPECIAL,
+				FIB_ENTRY_FLAG_LOCAL,
+				ADJ_INDEX_INVALID);
+
+    /*
+     * Add all-routers multicast address via local route for all tables
+     */
+    ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
+					IP6_MULTICAST_SCOPE_link_local,
+					IP6_MULTICAST_GROUP_ID_all_routers);
+    pfx.fp_len = 128;
+    fib_table_entry_special_add(fib_index,
+				&pfx,
+				FIB_SOURCE_SPECIAL,
+				FIB_ENTRY_FLAG_LOCAL,
+				ADJ_INDEX_INVALID);
+
+    /*
+     * Add all-nodes multicast address via local route for all tables
+     */
+    ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
+					IP6_MULTICAST_SCOPE_link_local,
+					IP6_MULTICAST_GROUP_ID_all_hosts);
+    pfx.fp_len = 128;
+    fib_table_entry_special_add(fib_index,
+				&pfx,
+				FIB_SOURCE_SPECIAL,
+				FIB_ENTRY_FLAG_LOCAL,
+				ADJ_INDEX_INVALID);
+
+    /*
+     *  Add all-mldv2  multicast address via local route for all tables
+     */
+    ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
+					IP6_MULTICAST_SCOPE_link_local,
+					IP6_MULTICAST_GROUP_ID_mldv2_routers);
+    pfx.fp_len = 128;
+    fib_table_entry_special_add(fib_index,
+				&pfx,
+				FIB_SOURCE_SPECIAL,
+				FIB_ENTRY_FLAG_LOCAL,
+				ADJ_INDEX_INVALID);
+
+    /*
+     * all link local for us
+     */
+    pfx.fp_addr.ip6.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
+    pfx.fp_addr.ip6.as_u64[1] = 0;
+    pfx.fp_len = 10;
+    fib_table_entry_special_add(fib_index,
+				&pfx,
+				FIB_SOURCE_SPECIAL,
+				FIB_ENTRY_FLAG_LOCAL,
+				ADJ_INDEX_INVALID);
+}
+
+static u32
+create_fib_with_table_id (u32 table_id)
+{
+    fib_table_t *fib_table;
+
+    pool_get_aligned(ip6_main.fibs, fib_table, CLIB_CACHE_LINE_BYTES);
+    memset(fib_table, 0, sizeof(*fib_table));
+
+    fib_table->ft_proto = FIB_PROTOCOL_IP6;
+    fib_table->ft_index =
+	fib_table->v6.index =
+	    (fib_table - ip6_main.fibs);
+
+    hash_set(ip6_main.fib_index_by_table_id, table_id, fib_table->ft_index);
+
+    fib_table->ft_table_id =
+	fib_table->v6.table_id =
+	    table_id;
+    fib_table->ft_flow_hash_config = 
+	fib_table->v6.flow_hash_config =
+	    IP_FLOW_HASH_DEFAULT;
+
+    vnet_ip6_fib_init(fib_table->ft_index);
+    fib_table_lock(fib_table->ft_index, FIB_PROTOCOL_IP6);
+
+    return (fib_table->ft_index);
+}
+
+u32
+ip6_fib_table_find_or_create_and_lock (u32 table_id)
+{
+    uword * p;
+
+    p = hash_get (ip6_main.fib_index_by_table_id, table_id);
+    if (NULL == p)
+	return create_fib_with_table_id(table_id);
+    
+    fib_table_lock(p[0], FIB_PROTOCOL_IP6);
+
+    return (p[0]);
+}
+
+u32
+ip6_fib_table_create_and_lock (void)
+{
+    return (create_fib_with_table_id(~0));
+}
+
+void
+ip6_fib_table_destroy (u32 fib_index)
+{
+    fib_prefix_t pfx = {
+	.fp_proto = FIB_PROTOCOL_IP6,
+	.fp_len = 0,
+	.fp_addr = {
+	    .ip6 = {
+		{ 0, 0, },
+	    },
+	}
+    };
+
+    /*
+     * the default route.
+     */
+    fib_table_entry_special_remove(fib_index,
+				   &pfx,
+				   FIB_SOURCE_DEFAULT_ROUTE);
+
+
+    /*
+     * ff02::1:ff00:0/104
+     */
+    ip6_set_solicited_node_multicast_address(&pfx.fp_addr.ip6, 0);
+    pfx.fp_len = 104;
+    fib_table_entry_special_remove(fib_index,
+				   &pfx,
+				   FIB_SOURCE_SPECIAL);
+
+    /*
+     * all-routers multicast address
+     */
+    ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
+					IP6_MULTICAST_SCOPE_link_local,
+					IP6_MULTICAST_GROUP_ID_all_routers);
+    pfx.fp_len = 128;
+    fib_table_entry_special_remove(fib_index,
+				   &pfx,
+				   FIB_SOURCE_SPECIAL);
+
+    /*
+     * all-nodes multicast address
+     */
+    ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
+					IP6_MULTICAST_SCOPE_link_local,
+					IP6_MULTICAST_GROUP_ID_all_hosts);
+    pfx.fp_len = 128;
+    fib_table_entry_special_remove(fib_index,
+				   &pfx,
+				   FIB_SOURCE_SPECIAL);
+
+    /*
+     * all-mldv2 multicast address
+     */
+    ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
+					IP6_MULTICAST_SCOPE_link_local,
+					IP6_MULTICAST_GROUP_ID_mldv2_routers);
+    pfx.fp_len = 128;
+    fib_table_entry_special_remove(fib_index,
+				   &pfx,
+				   FIB_SOURCE_SPECIAL);
+
+    /*
+     * all link local 
+     */
+    pfx.fp_addr.ip6.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
+    pfx.fp_addr.ip6.as_u64[1] = 0;
+    pfx.fp_len = 10;
+    fib_table_entry_special_remove(fib_index,
+				   &pfx,
+				   FIB_SOURCE_SPECIAL);
+
+    fib_table_t *fib_table = fib_table_get(fib_index, FIB_PROTOCOL_IP6);
+    fib_source_t source;
+    
+     /*
+     * validate no more routes.
+     */
+    ASSERT(0 == fib_table->ft_total_route_counts);
+    FOR_EACH_FIB_SOURCE(source)
+    {
+	ASSERT(0 == fib_table->ft_src_route_counts[source]);
+    }
+
+    if (~0 != fib_table->ft_table_id)
+    {
+	hash_unset (ip6_main.fib_index_by_table_id, fib_table->ft_table_id);
+    }
+    pool_put(ip6_main.fibs, fib_table);
+}
+
+fib_node_index_t
+ip6_fib_table_lookup (u32 fib_index,
+		      const ip6_address_t *addr,
+		      u32 len)
+{
+    const ip6_fib_table_instance_t *table;
+    BVT(clib_bihash_kv) kv, value;
+    int i, n_p, rv;
+    u64 fib;
+
+    table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
+    n_p = vec_len (table->prefix_lengths_in_search_order);
+
+    kv.key[0] = addr->as_u64[0];
+    kv.key[1] = addr->as_u64[1];
+    fib = ((u64)((fib_index))<<32);
+
+    /*
+     * start search from a mask length same length or shorter.
+     * we don't want matches longer than the mask passed
+     */
+    i = 0;
+    while (i < n_p && table->prefix_lengths_in_search_order[i] > len)
+    {
+        i++;
+    }
+
+    for (; i < n_p; i++)
+    {
+	int dst_address_length = table->prefix_lengths_in_search_order[i];
+	ip6_address_t * mask = &ip6_main.fib_masks[dst_address_length];
+      
+	ASSERT(dst_address_length >= 0 && dst_address_length <= 128);
+	//As lengths are decreasing, masks are increasingly specific.
+	kv.key[0] &= mask->as_u64[0];
+	kv.key[1] &= mask->as_u64[1];
+	kv.key[2] = fib | dst_address_length;
+      
+	rv = BV(clib_bihash_search_inline_2)(&table->ip6_hash, &kv, &value);
+	if (rv == 0)
+	    return value.value;
+    }
+
+    return (FIB_NODE_INDEX_INVALID);
+}
+
+fib_node_index_t
+ip6_fib_table_lookup_exact_match (u32 fib_index,
+				  const ip6_address_t *addr,
+				  u32 len)
+{
+    const ip6_fib_table_instance_t *table;
+    BVT(clib_bihash_kv) kv, value;
+    ip6_address_t *mask;
+    u64 fib;
+    int rv;
+
+    table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
+    mask = &ip6_main.fib_masks[len];
+    fib = ((u64)((fib_index))<<32);
+
+    kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
+    kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
+    kv.key[2] = fib | len;
+      
+    rv = BV(clib_bihash_search_inline_2)(&table->ip6_hash, &kv, &value);
+    if (rv == 0)
+	return value.value;
+
+    return (FIB_NODE_INDEX_INVALID);
+}
+
+static void
+compute_prefix_lengths_in_search_order (ip6_fib_table_instance_t *table)
+{
+    int i;
+    vec_reset_length (table->prefix_lengths_in_search_order);
+    /* Note: bitmap reversed so this is in fact a longest prefix match */
+    clib_bitmap_foreach (i, table->non_empty_dst_address_length_bitmap,
+    ({
+	int dst_address_length = 128 - i;
+	vec_add1(table->prefix_lengths_in_search_order, dst_address_length);
+    }));
+}
+
+void
+ip6_fib_table_entry_remove (u32 fib_index,
+			    const ip6_address_t *addr,
+			    u32 len)
+{
+    ip6_fib_table_instance_t *table;
+    BVT(clib_bihash_kv) kv;
+    ip6_address_t *mask;
+    u64 fib;
+
+    table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
+    mask = &ip6_main.fib_masks[len];
+    fib = ((u64)((fib_index))<<32);
+
+    kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
+    kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
+    kv.key[2] = fib | len;
+
+    BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 0);
+
+    /* refcount accounting */
+    ASSERT (table->dst_address_length_refcounts[len] > 0);
+    if (--table->dst_address_length_refcounts[len] == 0)
+    {
+	table->non_empty_dst_address_length_bitmap =
+            clib_bitmap_set (table->non_empty_dst_address_length_bitmap, 
+                             128 - len, 0);
+	compute_prefix_lengths_in_search_order (table);
+    }
+}
+
+void
+ip6_fib_table_entry_insert (u32 fib_index,
+			    const ip6_address_t *addr,
+			    u32 len,
+			    fib_node_index_t fib_entry_index)
+{
+    ip6_fib_table_instance_t *table;
+    BVT(clib_bihash_kv) kv;
+    ip6_address_t *mask;
+    u64 fib;
+
+    table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
+    mask = &ip6_main.fib_masks[len];
+    fib = ((u64)((fib_index))<<32);
+
+    kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
+    kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
+    kv.key[2] = fib | len;
+    kv.value = fib_entry_index;
+
+    BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 1);
+
+    table->dst_address_length_refcounts[len]++;
+
+    table->non_empty_dst_address_length_bitmap =
+        clib_bitmap_set (table->non_empty_dst_address_length_bitmap, 
+			 128 - len, 1);
+    compute_prefix_lengths_in_search_order (table);
+}
+
+u32 
+ip6_fib_table_fwding_lookup (ip6_main_t * im,
+                             u32 fib_index,
+                             const ip6_address_t * dst)
+{
+    const ip6_fib_table_instance_t *table;
+    int i, len;
+    int rv;
+    BVT(clib_bihash_kv) kv, value;
+    u64 fib;
+
+    table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
+    len = vec_len (table->prefix_lengths_in_search_order);
+
+    kv.key[0] = dst->as_u64[0];
+    kv.key[1] = dst->as_u64[1];
+    fib = ((u64)((fib_index))<<32);
+
+    for (i = 0; i < len; i++)
+    {
+	int dst_address_length = table->prefix_lengths_in_search_order[i];
+	ip6_address_t * mask = &ip6_main.fib_masks[dst_address_length];
+      
+	ASSERT(dst_address_length >= 0 && dst_address_length <= 128);
+	//As lengths are decreasing, masks are increasingly specific.
+	kv.key[0] &= mask->as_u64[0];
+	kv.key[1] &= mask->as_u64[1];
+	kv.key[2] = fib | dst_address_length;
+      
+	rv = BV(clib_bihash_search_inline_2)(&table->ip6_hash, &kv, &value);
+	if (rv == 0)
+	    return value.value;
+    }
+
+    /* default route is always present */
+    ASSERT(0);
+    return 0;
+}
+
+u32 ip6_fib_table_fwding_lookup_with_if_index (ip6_main_t * im,
+					       u32 sw_if_index,
+					       const ip6_address_t * dst)
+{
+    u32 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
+    return ip6_fib_table_fwding_lookup(im, fib_index, dst);
+}
+
+flow_hash_config_t
+ip6_fib_table_get_flow_hash_config (u32 fib_index)
+{
+    return (ip6_fib_get(fib_index)->flow_hash_config);
+}
+
+u32
+ip6_fib_table_get_index_for_sw_if_index (u32 sw_if_index)
+{
+    if (sw_if_index >= vec_len(ip6_main.fib_index_by_sw_if_index))
+    {
+	/*
+	 * This is the case for interfaces that are not yet mapped to
+	 * a IP table
+	 */
+	return (~0);
+    }
+    return (ip6_main.fib_index_by_sw_if_index[sw_if_index]);
+}
+
+void
+ip6_fib_table_fwding_dpo_update (u32 fib_index,
+				 const ip6_address_t *addr,
+				 u32 len,
+				 const dpo_id_t *dpo)
+{
+    ip6_fib_table_instance_t *table;
+    BVT(clib_bihash_kv) kv;
+    ip6_address_t *mask;
+    u64 fib;
+
+    table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
+    mask = &ip6_main.fib_masks[len];
+    fib = ((u64)((fib_index))<<32);
+
+    kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
+    kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
+    kv.key[2] = fib | len;
+    kv.value = dpo->dpoi_index;
+
+    BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 1);
+
+    table->dst_address_length_refcounts[len]++;
+
+    table->non_empty_dst_address_length_bitmap =
+        clib_bitmap_set (table->non_empty_dst_address_length_bitmap, 
+			 128 - len, 1);
+    compute_prefix_lengths_in_search_order (table);
+}
+
+void
+ip6_fib_table_fwding_dpo_remove (u32 fib_index,
+				 const ip6_address_t *addr,
+				 u32 len,
+				 const dpo_id_t *dpo)
+{
+    ip6_fib_table_instance_t *table;
+    BVT(clib_bihash_kv) kv;
+    ip6_address_t *mask;
+    u64 fib;
+
+    table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
+    mask = &ip6_main.fib_masks[len];
+    fib = ((u64)((fib_index))<<32);
+
+    kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
+    kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
+    kv.key[2] = fib | len;
+    kv.value = dpo->dpoi_index;
+
+    BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 0);
+
+    /* refcount accounting */
+    ASSERT (table->dst_address_length_refcounts[len] > 0);
+    if (--table->dst_address_length_refcounts[len] == 0)
+    {
+	table->non_empty_dst_address_length_bitmap =
+            clib_bitmap_set (table->non_empty_dst_address_length_bitmap, 
+                             128 - len, 0);
+	compute_prefix_lengths_in_search_order (table);
+    }
+}
+
+typedef struct ip6_fib_show_ctx_t_ {
+    u32 fib_index;
+    fib_node_index_t *entries;
+} ip6_fib_show_ctx_t;
+
+static void
+ip6_fib_table_collect_entries (clib_bihash_kv_24_8_t * kvp,
+			       void *arg)
+{
+    ip6_fib_show_ctx_t *ctx = arg;
+
+    if ((kvp->key[2] >> 32) == ctx->fib_index)
+    {
+	vec_add1(ctx->entries, kvp->value);
+    }
+}
+
+static void
+ip6_fib_table_show_all (ip6_fib_t *fib,
+			vlib_main_t * vm)
+{
+    fib_node_index_t *fib_entry_index;
+    ip6_fib_show_ctx_t ctx = {
+	.fib_index = fib->index,
+	.entries = NULL,
+    };
+    ip6_main_t *im = &ip6_main;
+
+    BV(clib_bihash_foreach_key_value_pair)(&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
+					   ip6_fib_table_collect_entries,
+					   &ctx);
+
+    vec_sort_with_function(ctx.entries, fib_entry_cmp_for_sort);
+
+    vec_foreach(fib_entry_index, ctx.entries)
+    {
+	vlib_cli_output(vm, "%U",
+                        format_fib_entry,
+                        *fib_entry_index,
+                        FIB_ENTRY_FORMAT_BRIEF);
+    }
+
+    vec_free(ctx.entries);
+}
+
+static void
+ip6_fib_table_show_one (ip6_fib_t *fib,
+			vlib_main_t * vm,
+			ip6_address_t *address,
+			u32 mask_len)
+{
+    vlib_cli_output(vm, "%U",
+                    format_fib_entry,
+                    ip6_fib_table_lookup(fib->index, address, mask_len),
+                    FIB_ENTRY_FORMAT_DETAIL);
+}
+
+typedef struct {
+  u32 fib_index;
+  u64 count_by_prefix_length[129];
+} count_routes_in_fib_at_prefix_length_arg_t;
+
+static void count_routes_in_fib_at_prefix_length 
+(BVT(clib_bihash_kv) * kvp, void *arg)
+{
+  count_routes_in_fib_at_prefix_length_arg_t * ap = arg;
+  int mask_width;
+
+  if ((kvp->key[2]>>32) != ap->fib_index)
+    return;
+
+  mask_width = kvp->key[2] & 0xFF;
+
+  ap->count_by_prefix_length[mask_width]++;
+}
+
+static clib_error_t *
+ip6_show_fib (vlib_main_t * vm,
+	      unformat_input_t * input,
+	      vlib_cli_command_t * cmd)
+{
+    count_routes_in_fib_at_prefix_length_arg_t _ca, *ca = &_ca;
+    ip6_main_t * im6 = &ip6_main;
+    fib_table_t *fib_table;
+    ip6_fib_t * fib;
+    int verbose, matching;
+    ip6_address_t matching_address;
+    u32 mask_len  = 128;
+    int table_id = -1, fib_index = ~0;
+
+    verbose = 1;
+    matching = 0;
+
+    while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+	if (unformat (input, "brief")   ||
+	    unformat (input, "summary") ||
+	    unformat (input, "sum"))
+	    verbose = 0;
+
+	else if (unformat (input, "%U/%d",
+			   unformat_ip6_address, &matching_address, &mask_len))
+	    matching = 1;
+
+	else if (unformat (input, "%U", unformat_ip6_address, &matching_address))
+	    matching = 1;
+
+	else if (unformat (input, "table %d", &table_id))
+	    ;
+	else if (unformat (input, "index %d", &fib_index))
+	    ;
+	else
+	    break;
+    }
+
+    pool_foreach (fib_table, im6->fibs,
+    ({
+	fib = &(fib_table->v6);
+	if (table_id >= 0 && table_id != (int)fib->table_id)
+	    continue;
+	if (fib_index != ~0 && fib_index != (int)fib->index)
+	    continue;
+
+	vlib_cli_output (vm, "%s, fib_index %d, flow hash: %U", 
+			 fib_table->ft_desc, fib->index,
+			 format_ip_flow_hash_config, fib->flow_hash_config);
+
+	/* Show summary? */
+	if (! verbose)
+	{
+	    BVT(clib_bihash) * h = &im6->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash;
+	    int len;
+
+	    vlib_cli_output (vm, "%=20s%=16s", "Prefix length", "Count");
+
+	    memset (ca, 0, sizeof(*ca));
+	    ca->fib_index = fib->index;
+
+	    BV(clib_bihash_foreach_key_value_pair)
+		(h, count_routes_in_fib_at_prefix_length, ca);
+
+	    for (len = 128; len >= 0; len--)
+            {
+		if (ca->count_by_prefix_length[len])
+		    vlib_cli_output (vm, "%=20d%=16lld", 
+				     len, ca->count_by_prefix_length[len]);
+            }
+	    continue;
+	}
+
+	if (!matching)
+	{
+	    ip6_fib_table_show_all(fib, vm);
+	}
+	else
+	{
+	    ip6_fib_table_show_one(fib, vm, &matching_address, mask_len);
+	}
+    }));
+
+    return 0;
+}
+
+/*?
+ * This command displays the IPv6 FIB Tables (VRF Tables) and the route
+ * entries for each table.
+ *
+ * @note This command will run for a long time when the FIB tables are
+ * comprised of millions of entries. For those senarios, consider displaying
+ * in summary mode.
+ *
+ * @cliexpar
+ * @parblock
+ * Example of how to display all the IPv6 FIB tables:
+ * @cliexstart{show ip6 fib}
+ * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
+ * @::/0
+ *   unicast-ip6-chain
+ *   [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
+ *     [0] [@0]: dpo-drop ip6
+ * fe80::/10
+ *   unicast-ip6-chain
+ *   [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
+ *     [0] [@2]: dpo-receive
+ * ff02::1/128
+ *   unicast-ip6-chain
+ *   [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
+ *     [0] [@2]: dpo-receive
+ * ff02::2/128
+ *   unicast-ip6-chain
+ *   [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
+ *     [0] [@2]: dpo-receive
+ * ff02::16/128
+ *   unicast-ip6-chain
+ *   [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
+ *     [0] [@2]: dpo-receive
+ * ff02::1:ff00:0/104
+ *   unicast-ip6-chain
+ *   [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
+ *     [0] [@2]: dpo-receive
+ * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
+ * @::/0
+ *   unicast-ip6-chain
+ *   [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
+ *     [0] [@0]: dpo-drop ip6
+ * @::a:1:1:0:4/126
+ *   unicast-ip6-chain
+ *   [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
+ *     [0] [@4]: ipv6-glean: af_packet0
+ * @::a:1:1:0:7/128
+ *   unicast-ip6-chain
+ *   [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
+ *     [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
+ * fe80::/10
+ *   unicast-ip6-chain
+ *   [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
+ *     [0] [@2]: dpo-receive
+ * fe80::fe:3eff:fe3e:9222/128
+ *   unicast-ip6-chain
+ *   [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
+ *     [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
+ * ff02::1/128
+ *   unicast-ip6-chain
+ *   [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
+ *     [0] [@2]: dpo-receive
+ * ff02::2/128
+ *   unicast-ip6-chain
+ *   [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
+ *     [0] [@2]: dpo-receive
+ * ff02::16/128
+ *   unicast-ip6-chain
+ *   [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
+ *     [0] [@2]: dpo-receive
+ * ff02::1:ff00:0/104
+ *   unicast-ip6-chain
+ *   [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
+ *     [0] [@2]: dpo-receive
+ * @cliexend
+ *
+ * Example of how to display a summary of all IPv6 FIB tables:
+ * @cliexstart{show ip6 fib summary}
+ * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
+ *     Prefix length         Count
+ *          128                3
+ *          104                1
+ *          10                 1
+ *           0                 1
+ * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
+ *     Prefix length         Count
+ *          128                5
+ *          126                1
+ *          104                1
+ *          10                 1
+ *           0                 1
+ * @cliexend
+ * @endparblock
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (ip6_show_fib_command, static) = {
+    .path = "show ip6 fib",
+    .short_help = "show ip6 fib [summary] [table <table-id>] [index <fib-id>] [<ip6-addr>[/<width>]]",
+    .function = ip6_show_fib,
+};
+/* *INDENT-ON* */