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Re: [Qemu-devel] qemu iotest 020 failing for vmdk after 2b7731938d9

From: Max Reitz
Subject: Re: [Qemu-devel] qemu iotest 020 failing for vmdk after 2b7731938d9
Date: Wed, 22 Nov 2017 19:22:35 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0

On 2017-11-21 23:16, John Snow wrote:
> Commit 2b7731938d9 adds a blkdebug driver test for failing commits, but
> the vmdk driver doesn't appear to appreciate this format:
> +_qemu_img_wrapper create -f vmdk -b "json:{'driver': 'raw',
> +                         'file': {
> +                             'driver': 'blkdebug',
> +                             'inject-error': [{
> +                                 'event': 'write_aio',
> +                                 'errno': 28,
> +                                 'once': true
> +                             }],
> +                             'image': {
> +                                 'driver': 'null-co'
> +                             }}}"
> "/home/bos/jhuston/src/qemu/bin/git/tests/qemu-iotests/scratch/t.vmdk"
> +qemu-img: TEST_DIR/t.IMGFMT: Could not create image: Invalid argument
> ...so;
> (A) VMDK should be dropped from 020, or
> (B) This sub-test should be rewritten, or
> (C) This sub-test should be split out into a new unit where VMDK can be
> dropped.
> I don't like (A) very much because I like testing our weird formats when
> possible, I don't like (B) very much because I don't really like
> wrangling QMP commands inside of the bash unit tests.
> (C) Could work; though it's odd to have it away from its kin in 020.

The issue is not blkdebug, the issue is that the backing file is not in
vmdk format (because it's a null-co node at heart).

I can make it a VMDK, but that'll be fun either when specifying the
backing file file.image node because this test is supposed to work with
all protocols but NFS; or I'll have to resort to the gold old
blkdebug:conf:file syntax...  But why not, it works.

Now I'll just have to figure this out:

-qemu-img: Block job failed: No space left on device
+Image committed.



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