From 89d22bc30629f6b89ed7fcbe4c7c6a6d1a9fd626 Mon Sep 17 00:00:00 2001 From: Stefan Hajnoczi Date: Fri, 15 Oct 2010 07:55:52 -0700 Subject: qemu-iotests: add sub-cluster allocating write test for sparse image formats Image formats that grow the image file on demand and are organized into clusters must handle sub-cluster allocating writes. Such writes touch a portion of a previously unallocated data cluster. After the image file is grown with the written data, reads of that cluster should work as expected: 1. Sectors before the written region are zero. 2. The written region is present and the data is uncorrupted. 3. Sectors after the written region are zero. Signed-off-by: Stefan Hajnoczi Signed-off-by: Christoph Hellwig --- tests/qemu-iotests/027.out | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 tests/qemu-iotests/027.out (limited to 'tests/qemu-iotests/027.out') diff --git a/tests/qemu-iotests/027.out b/tests/qemu-iotests/027.out new file mode 100644 index 0000000..a45c303 --- /dev/null +++ b/tests/qemu-iotests/027.out @@ -0,0 +1,23 @@ +QA output created by 027 +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 + +== writing first cluster to populate metadata == +wrote 65536/65536 bytes at offset 65536 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== writing at sub-cluster granularity == +wrote 2048/2048 bytes at offset 1024 +2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== verify pattern == +read 2048/2048 bytes at offset 1024 +2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== verify zeroes before sub-cluster pattern == +read 2048/2048 bytes at offset 0 +2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== verify zeroes after sub-cluster pattern == +read 2560/2560 bytes at offset 1024 +2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +*** done -- cgit v1.1