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[Qemu-block] [PULL 04/13] docs: Describe using images in writing iotests
From: |
Kevin Wolf |
Subject: |
[Qemu-block] [PULL 04/13] docs: Describe using images in writing iotests |
Date: |
Mon, 30 Jul 2018 17:09:49 +0200 |
From: Fam Zheng <address@hidden>
Signed-off-by: Fam Zheng <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
Reviewed-by: John Snow <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
docs/devel/testing.rst | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/docs/devel/testing.rst b/docs/devel/testing.rst
index 5e19cd50da..8e1fa3a66e 100644
--- a/docs/devel/testing.rst
+++ b/docs/devel/testing.rst
@@ -255,6 +255,17 @@ comparable library support for invoking and interacting
with QEMU programs. If
you opt for Python, it is strongly recommended to write Python 3 compatible
code.
+Both Python and Bash frameworks in iotests provide helpers to manage test
+images. They can be used to create and clean up images under the test
+directory. If no I/O or any protocol specific feature is needed, it is often
+more convenient to use the pseudo block driver, ``null-co://``, as the test
+image, which doesn't require image creation or cleaning up. Avoid system-wide
+devices or files whenever possible, such as ``/dev/null`` or ``/dev/zero``.
+Otherwise, image locking implications have to be considered. For example,
+another application on the host may have locked the file, possibly leading to a
+test failure. If using such devices are explicitly desired, consider adding
+``locking=off`` option to disable image locking.
+
Docker based tests
==================
--
2.13.6
- [Qemu-block] [PULL 00/13] Block layer patches, Kevin Wolf, 2018/07/30
- [Qemu-block] [PULL 02/13] qcow2: A grammar fix in conflicting cache sizing error message, Kevin Wolf, 2018/07/30
- [Qemu-block] [PULL 01/13] qcow: fix a reference leak, Kevin Wolf, 2018/07/30
- [Qemu-block] [PULL 04/13] docs: Describe using images in writing iotests,
Kevin Wolf <=
- [Qemu-block] [PULL 03/13] file-posix: Handle EINTR in preallocation=full write, Kevin Wolf, 2018/07/30
- [Qemu-block] [PULL 05/13] iotests: Don't lock /dev/null in 226, Kevin Wolf, 2018/07/30
- [Qemu-block] [PULL 06/13] Revert "qemu-img: Document copy offloading implications with -S and -c", Kevin Wolf, 2018/07/30
- [Qemu-block] [PULL 07/13] qemu-img: Add -C option for convert with copy offloading, Kevin Wolf, 2018/07/30
- [Qemu-block] [PULL 10/13] file-posix: Fix write_zeroes with unmap on block devices, Kevin Wolf, 2018/07/30
- [Qemu-block] [PULL 08/13] iotests: Add test for 'qemu-img convert -C' compatibility, Kevin Wolf, 2018/07/30
- [Qemu-block] [PULL 11/13] block/qapi: Add 'qdev' field to query-blockstats result, Kevin Wolf, 2018/07/30
- [Qemu-block] [PULL 12/13] block/qapi: Include anonymous BBs in query-blockstats, Kevin Wolf, 2018/07/30
- [Qemu-block] [PULL 09/13] block: Fix documentation for BDRV_REQ_MAY_UNMAP, Kevin Wolf, 2018/07/30
- [Qemu-block] [PULL 13/13] qemu-iotests: Test query-blockstats with -drive and -blockdev, Kevin Wolf, 2018/07/30