From 48758a84738c5be8cf022062ed0b85ff2ebacc0c Mon Sep 17 00:00:00 2001 From: Max Reitz Date: Wed, 26 Apr 2017 15:46:48 +0200 Subject: qemu-img/convert: Move bs_n > 1 && -B check down It does not make much sense to use a backing image for the target when you concatenate multiple images (because then there is no correspondence between the source images' backing files and the target's); but it was still possible to give one by using -o backing_file=X instead of -B X. Fix this by moving the check. (Also, change the error message because -B is not the only way to specify the backing file, evidently.) Signed-off-by: Max Reitz Reviewed-by: Eric Blake Signed-off-by: Kevin Wolf --- qemu-img.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'qemu-img.c') diff --git a/qemu-img.c b/qemu-img.c index e0503aec9b..704488484d 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -2089,12 +2089,6 @@ static int img_convert(int argc, char **argv) } - if (s.src_num > 1 && out_baseimg) { - error_report("-B makes no sense when concatenating multiple input " - "images"); - goto fail_getopt; - } - /* ret is still -EINVAL until here */ ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); if (ret < 0) { @@ -2208,6 +2202,13 @@ static int img_convert(int argc, char **argv) } s.target_has_backing = (bool) out_baseimg; + if (s.src_num > 1 && out_baseimg) { + error_report("Having a backing file for the target makes no sense when " + "concatenating multiple input images"); + ret = -1; + goto out; + } + /* Check if compression is supported */ if (s.compressed) { bool encryption = -- cgit v1.2.1