Signed-off-by: Peter Lieven <p...@kamp.de>
---
qemu-img.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/qemu-img.c b/qemu-img.c
index 3e5e388..7600b58 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -100,8 +100,10 @@ static void help(void)
" '-h' with or without a command shows this help and lists the
supported formats\n"
" '-p' show progress of command (only certain commands)\n"
" '-q' use Quiet mode - do not print any output (except errors)\n"
- " '-S' indicates the consecutive number of bytes that must contain
only zeros\n"
- " for qemu-img to create a sparse image during conversion\n"
+ " '-S' indicates the consecutive number of bytes (defaults to
4096) that must\n"
+ " contain only zeros for qemu-img to create a sparse image
during\n"
+ " conversion. if the number of bytes is 0 sparse files are
disabled and\n"
+ " images will always be fully allocated\n"
" '--output' takes the format in which the output must be done
(human or json)\n"
" '-n' skips the target volume creation (useful if the volume is
created\n"
" prior to running qemu-img)\n"
@@ -1468,7 +1470,7 @@ static int img_convert(int argc, char **argv)
/* signal EOF to align */
bdrv_write_compressed(out_bs, 0, NULL, 0);
} else {
- int has_zero_init = bdrv_has_zero_init(out_bs);
+ int has_zero_init = min_sparse ? bdrv_has_zero_init(out_bs) : 0;
sector_num = 0; // total number of sectors converted so far
nb_sectors = total_sectors - sector_num;
--
1.7.9.5
