QED relies on the underlying filesystem to extend the file and maintain
its size. Check that images are not created on a block device.
Signed-off-by: Stefan Hajnoczi <stefa...@linux.vnet.ibm.com>
---
block/qed.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/block/qed.c b/block/qed.c
index 085c4f2..a46f9ef 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -469,6 +469,12 @@ static int qed_create(const char *filename, uint32_t
cluster_size,
return ret;
}
+ /* File must start empty and grow, check truncate is supported */
+ ret = bdrv_truncate(bs, 0);
+ if (ret < 0) {
+ goto out;
+ }
+
if (backing_file) {
header.features |= QED_F_BACKING_FILE;
header.backing_filename_offset = sizeof(le_header);
--
1.7.2.3
