fib: add early config support for IP and IP6 default FIB table names

Type: improvement
Change-Id: I8c248d9e224bd069b641a174da57d448371470af
Signed-off-by: Jon Loeliger <jdl@netgate.com>

5 files changed, 82 insertions, 12 deletions

diff --git a/src/vnet/fib/fib_table.c b/src/vnet/fib/fib_table.c
index 85b17870eec..b2a32d0da56 100644
--- a/src/vnet/fib/fib_table.c
+++ b/src/vnet/fib/fib_table.c
@@ -25,6 +25,13 @@
 
 const static char * fib_table_flags_strings[] = FIB_TABLE_ATTRIBUTES;
 
+/*
+ * Default names for IP4, IP6, and MPLS FIB table index 0.
+ * Nominally like "ipv6-VRF:0", but this will override that name if set
+ * in a config section of the startup.conf file.
+ */
+char *fib_table_default_names[FIB_PROTOCOL_MAX];
+
 fib_table_t *
 fib_table_get (fib_node_index_t index,
 	       fib_protocol_t proto)
@@ -1153,21 +1160,29 @@ fib_table_find_or_create_and_lock_i (fib_protocol_t proto,
 
     fib_table = fib_table_get(fi, proto);
 
-    if (NULL == fib_table->ft_desc)
+    if (fib_table->ft_desc)
+	    return fi;
+
+    if (name && name[0])
     {
-        if (name && name[0])
-        {
-            fib_table->ft_desc = format(NULL, "%s", name);
-        }
-        else
-        {
-            fib_table->ft_desc = format(NULL, "%U-VRF:%d",
-                                        format_fib_protocol, proto,
-                                        table_id);
-        }
+        fib_table->ft_desc = format(NULL, "%s", name);
+	return fi;
     }
 
-    return (fi);
+    if (table_id == 0)
+    {
+	char *default_name = fib_table_default_names[proto];
+	if (default_name && default_name[0])
+	{
+	    fib_table->ft_desc = format(NULL, "%s", default_name);
+	    return fi;
+	}
+    }
+
+    fib_table->ft_desc = format(NULL, "%U-VRF:%d",
+				format_fib_protocol, proto,
+				table_id);
+    return fi;
 }
 
 u32
diff --git a/src/vnet/fib/fib_table.h b/src/vnet/fib/fib_table.h
index 11137e173cf..0eaaa67eea2 100644
--- a/src/vnet/fib/fib_table.h
+++ b/src/vnet/fib/fib_table.h
@@ -122,6 +122,15 @@ typedef struct fib_table_t_
     u8* ft_desc;
 } fib_table_t;
 
+
+/**
+ * @brief
+ *  Default names for IP4, IP6, and MPLS FIB table index 0.
+ *  Nominally like "ipv4-VRF:0", but this will override that name if set
+ *  in a config section of the startup.conf file.
+ */
+extern char *fib_table_default_names[FIB_PROTOCOL_MAX];
+
 /**
  * @brief
  *  Format the description/name of the table
diff --git a/src/vnet/fib/ip4_fib.c b/src/vnet/fib/ip4_fib.c
index 4211f8785ca..0eff8d0d485 100644
--- a/src/vnet/fib/ip4_fib.c
+++ b/src/vnet/fib/ip4_fib.c
@@ -626,3 +626,24 @@ VLIB_CLI_COMMAND (ip4_show_fib_command, static) = {
     .short_help = "show ip fib [summary] [table <table-id>] [index <fib-id>] [<ip4-addr>[/<mask>]] [mtrie] [detail]",
     .function = ip4_show_fib,
 };
+
+static clib_error_t *
+ip_config (vlib_main_t * vm, unformat_input_t * input)
+{
+    char *default_name = 0;
+
+    while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+	if (unformat (input, "default-table-name %s", &default_name))
+	    ;
+	else
+	    return clib_error_return (0, "unknown input '%U'",
+				      format_unformat_error, input);
+    }
+
+    fib_table_default_names[FIB_PROTOCOL_IP4] = default_name;
+
+    return 0;
+}
+
+VLIB_EARLY_CONFIG_FUNCTION (ip_config, "ip");
diff --git a/src/vnet/fib/ip6_fib.c b/src/vnet/fib/ip6_fib.c
index c40491cc997..d37b77e08a4 100644
--- a/src/vnet/fib/ip6_fib.c
+++ b/src/vnet/fib/ip6_fib.c
@@ -873,6 +873,7 @@ ip6_config (vlib_main_t * vm, unformat_input_t * input)
 {
   uword heapsize = 0;
   u32 nbuckets = 0;
+  char *default_name = 0;
 
   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
     {
@@ -881,6 +882,8 @@ ip6_config (vlib_main_t * vm, unformat_input_t * input)
       else if (unformat (input, "heap-size %U",
 			 unformat_memory_size, &heapsize))
 	;
+      else if (unformat (input, "default-table-name %s", &default_name))
+	;
       else
 	return clib_error_return (0, "unknown input '%U'",
 				  format_unformat_error, input);
@@ -888,6 +891,7 @@ ip6_config (vlib_main_t * vm, unformat_input_t * input)
 
   ip6_fib_table_nbuckets = nbuckets;
   ip6_fib_table_size = heapsize;
+  fib_table_default_names[FIB_PROTOCOL_IP6] = default_name;
 
   return 0;
 }
diff --git a/src/vnet/fib/mpls_fib.c b/src/vnet/fib/mpls_fib.c
index 5dcd70b4c53..767fc84c8a8 100644
--- a/src/vnet/fib/mpls_fib.c
+++ b/src/vnet/fib/mpls_fib.c
@@ -481,3 +481,24 @@ VLIB_CLI_COMMAND (mpls_fib_show_command, static) = {
     .short_help = "show mpls fib [summary] [table <n>]",
     .function = mpls_fib_show,
 };
+
+static clib_error_t *
+mpls_config (vlib_main_t * vm, unformat_input_t * input)
+{
+    char *default_name = 0;
+
+    while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+	if (unformat (input, "default-table-name %s", &default_name))
+	    ;
+	else
+	    return clib_error_return (0, "unknown input '%U'",
+				      format_unformat_error, input);
+    }
+
+    fib_table_default_names[FIB_PROTOCOL_MPLS] = default_name;
+
+    return 0;
+}
+
+VLIB_EARLY_CONFIG_FUNCTION (mpls_config, "mpls");