block: Add hint to -EFBIG error message
The limit of qcow2 files at least depends on the cluster size. If the
image format has a cluster_size option, suggest to increase it.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/block.c b/block.c
index aa9a533..3f87489 100644
--- a/block.c
+++ b/block.c
@@ -4857,8 +4857,12 @@
error_setg(errp,"Formatting or formatting option not supported for "
"file format '%s'", fmt);
} else if (ret == -EFBIG) {
- error_setg(errp, "The image size is too large for file format '%s'",
- fmt);
+ const char *cluster_size_hint = "";
+ if (get_option_parameter(create_options, BLOCK_OPT_CLUSTER_SIZE)) {
+ cluster_size_hint = " (try using a larger cluster size)";
+ }
+ error_setg(errp, "The image size is too large for file format '%s'%s",
+ fmt, cluster_size_hint);
} else {
error_setg(errp, "%s: error while creating %s: %s", filename, fmt,
strerror(-ret));
