From 259b21731050eccfe1fd4da949a9633ec7547b04 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Tue, 6 Mar 2012 12:44:45 +0100 Subject: qcow2: Add error messages in qcow2_truncate qemu-img resize has some limitations with qcow2, but the user is only told that "this image format does not support resize". Quite confusing, so add some more detailed error_report() calls and change "this image format" into "this image". Signed-off-by: Kevin Wolf Reviewed-by: Stefan Hajnoczi --- block/qcow2.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'block/qcow2.c') diff --git a/block/qcow2.c b/block/qcow2.c index 6f53ec6..7aece65 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1120,16 +1120,19 @@ static int qcow2_truncate(BlockDriverState *bs, int64_t offset) int ret, new_l1_size; if (offset & 511) { + error_report("The new size must be a multiple of 512"); return -EINVAL; } /* cannot proceed if image has snapshots */ if (s->nb_snapshots) { + error_report("Can't resize an image which has snapshots"); return -ENOTSUP; } /* shrinking is currently not supported */ if (offset < bs->total_sectors * 512) { + error_report("qcow2 doesn't support shrinking images yet"); return -ENOTSUP; } -- cgit v1.1