vlib: add plugin override support

Allow a plugin to override (suppress loading of) other plugins. This
mechanism allows a developer to prevent specific plugins from being
loaded.

To do so, provide an "overrides" list in the plugin definition:

VLIB_PLUGIN_REGISTER () =
{
  <snip>
  .overrides = "avf_plugin.so,ioam_plugin.so,dpdk_plugin.so",
};

or some such. Simply list the plugins in question as shown above. The
.overrides structure member is limited to 256 octets. The named .elf
section mechanism used to discover the vlib_plugin_registration_t's
precludes the use of a variable-length array of strings.

Use the vlib log to eliminate plugin and built-in vat plugin loader
console spew.

Added vlib_log_register_class_rate_limit(...) to allow procedural
configuration of the log rate-limit. We *never* want to rate-limit
plugin loader messages.

Type: feature

Signed-off-by: Dave Barach <dave@barachs.net>
Change-Id: I0a9327b8cf5508482f057342783252112cb44170

1 files changed, 0 insertions, 2 deletions

diff --git a/src/vlib/main.c b/src/vlib/main.c
index 4223474367e..28c8c789c0a 100644
--- a/src/vlib/main.c
+++ b/src/vlib/main.c
@@ -2021,8 +2021,6 @@ vlib_main (vlib_main_t * volatile vm, unformat_input_t * input)
 
   vm->queue_signal_callback = dummy_queue_signal_callback;
 
-  clib_time_init (&vm->clib_time);
-
   /* Turn on event log. */
   if (!vm->elog_main.event_ring_size)
     vm->elog_main.event_ring_size = 128 << 10;