[PATCH 1/3] xfs_io: don't pass negative len to copy_file_range_cmd

[Eric Sandeen <sandeen@redhat.com>]

If copy_src_filesize returns an error (-1) we should return that
error, and not pass it to copy_file_range_cmd().

Addresses-Coverity-ID: 1431684 ("Improper use of negative value")
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
---

diff --git a/io/copy_file_range.c b/io/copy_file_range.c
index 4e2969c..bc891c9 100644
--- a/io/copy_file_range.c
+++ b/io/copy_file_range.c
@@ -121,6 +121,10 @@ copy_range_f(int argc, char **argv)
 
 	if (src == 0 && dst == 0 && len == 0) {
 		len = copy_src_filesize(fd);
+		if (len < 0) {
+			close(fd);
+			return 0;
+		}
 		copy_dst_truncate();
 	}