qemu-img: Print available options with -o ?

This patch adds a small help text to each of the options in the block drivers
which can be displayed by using qemu-img create -f fmt -o ?

Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/block/raw-win32.c b/block/raw-win32.c
index 6e5c09bcb5..1e95153d56 100644
--- a/block/raw-win32.c
+++ b/block/raw-win32.c
@@ -234,7 +234,11 @@ static int raw_create(const char *filename, QEMUOptionParameter *options)
 }
 
 static QEMUOptionParameter raw_create_options[] = {
-    { BLOCK_OPT_SIZE,           OPT_SIZE },
+    {
+        .name = BLOCK_OPT_SIZE,
+        .type = OPT_SIZE,
+        .help = "Virtual disk size"
+    },
     { NULL }
 };