lib: dynamic module loading

This adds a "-M" option to each daemon, to load dynamic modules at
startup.  Modules are by default located in /usr/lib/frr/modules (lib64
if appropriate).  Unloading or loading at runtime is not supported at
this point to keep things simple.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

1 files changed, 11 insertions, 2 deletions

diff --git a/lib/libfrr.h b/lib/libfrr.h
index d37f406f5b..71225fad38 100644
--- a/lib/libfrr.h
+++ b/lib/libfrr.h
@@ -26,6 +26,7 @@
 #include "thread.h"
 #include "log.h"
 #include "getopt.h"
+#include "module.h"
 
 #define FRR_NO_PRIVSEP		(1 << 0)
 #define FRR_NO_TCPVTY		(1 << 1)
@@ -40,6 +41,7 @@ struct frr_daemon_info {
 	const char *name;
 	const char *logname;
 	unsigned short instance;
+	struct frrmod_runtime *module;
 
 	char *vty_addr;
 	int vty_port;
@@ -67,15 +69,22 @@ struct frr_daemon_info {
  * i.e. "ZEBRA" or "BGP"
  *
  * note that this macro is also a latch-on point for other changes (e.g.
- * upcoming plugin support) that need to place some per-daemon things.  Each
+ * upcoming module support) that need to place some per-daemon things.  Each
  * daemon should have one of these.
  */
 #define FRR_DAEMON_INFO(execname, constname, ...) \
 	static struct frr_daemon_info execname ##_di = { \
 		.name = # execname, \
 		.logname = # constname, \
+		.module = THIS_MODULE, \
 		__VA_ARGS__ \
-	};
+	}; \
+	FRR_COREMOD_SETUP( \
+		.name = # execname, \
+		.description = # execname " daemon", \
+                .version = FRR_VERSION, \
+	) \
+	/* end */
 
 extern void frr_preinit(struct frr_daemon_info *daemon,
 		int argc, char **argv);