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Re: [Qemu-block] [Qemu-devel] [PATCH 2/2] block/iscsi: only report an iS

From: Eric Blake
Subject: Re: [Qemu-block] [Qemu-devel] [PATCH 2/2] block/iscsi: only report an iSCSI Failure if we don't handle it gracefully
Date: Fri, 8 Dec 2017 11:03:12 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0

On 12/08/2017 10:14 AM, Peter Lieven wrote:
> Am 08.12.2017 um 16:11 schrieb Eric Blake:
>> On 12/08/2017 05:51 AM, Peter Lieven wrote:
>>> we currently report an "iSCSI Failure" in iscsi_co_generic_cb if the task
>>> hasn't completed with SCSI_STATUS_GOOD. However, we expect a failure in
>>> some cases and handle it gracefully. This is the case for misaligned UNMAPs
>> Is the block layer still capable of producing a misaligned UNMAP?  If
>> so, that's probably a bug in the block layer for not honoring the block
>> limit geometries.
> In theory there should be none. I think we can drop this code.

Or, better yet, replace the check with an assert.

Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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