Basic support for persistent minor numbers;

slightly different from the current LVM1 method.

  lvcreate --persistent y  --minor 10   (to specify when created)
  lvchange --persistent n  (to turn off)
  lvchange --persistent y  --minor 11   (to change)

--persistent uses a new LV status flag stored on disk
minor number is stored on disk the same way as LVM1 does
(but major number stored is 0; any LVM1 major/minor setting gets lost)

  lvchange -ay --minor 12 (to activate using minor 12, regardless of the
                           on-disk setting, which doesn't get changed)

--minor == -m
--persistent == -M

1 files changed, 15 insertions, 0 deletions

diff --git a/tools/lvm.c b/tools/lvm.c
index 9adc26c2..3d84cab3 100644
--- a/tools/lvm.c
+++ b/tools/lvm.c
@@ -294,6 +294,21 @@ int int_arg_with_sign(struct arg *a)
 	return 1;
 }
 
+int minor_arg(struct arg *a)
+{
+	char *ptr;
+
+	if (!_get_int_arg(a, &ptr) || (*ptr) || (a->sign == SIGN_MINUS))
+		return 0;
+
+	if (a->i_value > 255) {
+		log_error("Minor number outside range 0-255");
+		return 0;
+	}
+
+	return 1;
+}
+
 int string_arg(struct arg *a)
 {
 	return 1;