Provide a set of sysctls and tunables to disable device node creation

for specific "kinds" of disk labels - for example, GPT UUIDs.  Reason
for this is that sometimes, other GEOM classes attach to these device
nodes instead of the proper ones - e.g. they attach to /dev/gptid/XXX
instead of /dev/ada0p2, which is annoying.

Reviewed by:	pjd (earlier version)
MFC after:	1 month

1 files changed, 5 insertions, 2 deletions

diff --git a/sys/geom/label/g_label_ntfs.c b/sys/geom/label/g_label_ntfs.c
index 4781d7d..1ee3f79 100644
--- a/sys/geom/label/g_label_ntfs.c
+++ b/sys/geom/label/g_label_ntfs.c
@@ -114,7 +114,10 @@ done:
 		g_free(filerecp);
 }
 
-const struct g_label_desc g_label_ntfs = {
+struct g_label_desc g_label_ntfs = {
 	.ld_taste = g_label_ntfs_taste,
-	.ld_dir = G_LABEL_NTFS_DIR
+	.ld_dir = G_LABEL_NTFS_DIR,
+	.ld_enabled = 1
 };
+
+G_LABEL_INIT(ntfs, g_label_ntfs, "Create device nodes for NTFS volumes");