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iotests: Test unaligned raw images with O_DIRECT

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We already have 221 for accesses through the page cache, but it is
better to create a new file for O_DIRECT instead of integrating those
test cases into 221.  This way, we can make use of
_supported_cache_modes (and _default_cache_mode) so the test is
automatically skipped on filesystems that do not support O_DIRECT.

As part of the split, add _supported_cache_modes to 221.  With that, it
no longer fails when run with -c none or -c directsync.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2019-05-15 06:15:41 +02:00 • committed by Kevin Wolf
parent 9c3db310ff
commit 2fab30c80b
4 changed files with 103 additions and 0 deletions
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4
tests/qemu-iotests/221
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@ -1,6 +1,7 @@
#!/usr/bin/env bash
#
# Test qemu-img vs. unaligned images
# (See also 253, which is the O_DIRECT version)
#
# Copyright (C) 2018-2019 Red Hat, Inc.
#
@ -37,6 +38,9 @@ _supported_fmt raw
_supported_proto file
_supported_os Linux
_default_cache_mode writeback
_supported_cache_modes writeback writethrough unsafe
echo
echo "=== Check mapping of unaligned raw image ==="
echo