Re: [PATCH] iotests: don't run tests requiring cached writes in '-nocache' mode

[Kevin Wolf <kwolf@redhat.com>]

Am 11.12.2023 um 14:32 hat Andrey Drobyshev geschrieben:
> There're tests whose logic implies running without O_DIRECT set,
> otherwise they fail when running iotests in '-nocache' mode.  For these
> tests let's add _require_no_o_direct() helper which can be put in the
> preabmle and which makes sure '-nocache' isn't set.  Use it to skip
> running the following tests:
> 
>   * 271: creates files with unaligned sizes, thus producing multiple
>     errors like:
> 
> qemu-io: can't open device /path/to/t.qcow2.raw: Cannot get 'write'
> permission without 'resize': Image size is not a multiple of request alignment
> 
>   * 308, file-io-error: use fuse exports.  Though fuse does have
>     'direct-io' mode (see https://docs.kernel.org/filesystems/fuse-io.html)
>     we aren't using it yet, thus getting errors like:
> 
> qemu-io: can't open device /path/to/t.qcow2.fuse: Could not open
> '/path/to/t.qcow2.fuse': filesystem does not support O_DIRECT
> 
> Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>

How are you running qemu-iotests to make these tests fail? I tried to
reproduce, but they just pass for me:

$ tests/qemu-iotests/check -qcow2 -nocache 271 308 file-io-error
[...]
271             pass       [11:20:50] [11:21:11]   21.1s  (last: 20.4s) 
308             pass       [11:21:11] [11:21:14]   3.3s   (last: 3.3s)  
file-io-error   pass       [11:21:14] [11:21:14]   0.3s   (last: 0.3s)  
Passed all 3 iotests

$ tests/qemu-iotests/check -raw -nocache 271 308 file-io-error
271             not run    [11:21:20] [11:21:21]   ...                  not suitable for this image format: raw
308             pass       [11:21:21] [11:21:24]   3.8s   (last: 2.8s)  
file-io-error   pass       [11:21:24] [11:21:25]   0.3s   (last: 0.3s)  
Not run: 271
Passed all 2 iotests

Kevin