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-rw-r--r--block/file-posix.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/block/file-posix.c b/block/file-posix.c
index 3927fabf06..4a40976d4c 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -1624,12 +1624,19 @@ static void raw_close(BlockDriverState *bs)
}
}
-static int raw_truncate(BlockDriverState *bs, int64_t offset, Error **errp)
+static int raw_truncate(BlockDriverState *bs, int64_t offset,
+ PreallocMode prealloc, Error **errp)
{
BDRVRawState *s = bs->opaque;
struct stat st;
int ret;
+ if (prealloc != PREALLOC_MODE_OFF) {
+ error_setg(errp, "Unsupported preallocation mode '%s'",
+ PreallocMode_lookup[prealloc]);
+ return -ENOTSUP;
+ }
+
if (fstat(s->fd, &st)) {
ret = -errno;
error_setg_errno(errp, -ret, "Failed to fstat() the file");