Add a new rescan method to the bus interface.

The BUS_RESCAN() method rescans a single bus device checking for devices
that have been added or removed from the bus.  A new 'rescan' command is
added to devctl(8) to trigger a rescan.

Differential Revision:	https://reviews.freebsd.org/D6016

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/libdevctl/devctl.c b/lib/libdevctl/devctl.c
index 7be431e..33c891b 100644
--- a/lib/libdevctl/devctl.c
+++ b/lib/libdevctl/devctl.c
@@ -122,3 +122,10 @@ devctl_set_driver(const char *device, const char *driver, bool force)
 		req.dr_flags |= DEVF_SET_DRIVER_DETACH;
 	return (devctl_request(DEV_SET_DRIVER, &req));
 }
+
+int
+devctl_rescan(const char *device)
+{
+
+	return (devctl_simple_request(DEV_RESCAN, device, 0));
+}