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Re: [Qemu-devel] [PATCH v4 0/2] hw/scsi: support SCSI-2 passthrough with

From: Daniel Henrique Barboza
Subject: Re: [Qemu-devel] [PATCH v4 0/2] hw/scsi: support SCSI-2 passthrough without PI
Date: Fri, 6 Apr 2018 09:06:01 -0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0

On 04/06/2018 07:12 AM, Paolo Bonzini wrote:
On 06/04/2018 01:10, Daniel Henrique Barboza wrote:
Yet another fix is to fully prohibit the user to set scsi_version
scsi-block and scsi-generic cases, returning an error message right off
the start. Not sure how hard this would be - perhaps the above
alternatives are cleaner.

Another fix is ... no fix. I am not sure how far the design philosophy
of passthrough devices allows the user to overwrite device parameters in
despite of their real values, but ....  what if the user wants to
enforce a scsi_version when using a scsi-block device? The device will
surely behave badly, but the user explicitly enforced it via command
line, so perhaps let him/her have at it?
Yeah, that was the idea.  Removing it is as easy as dropping the
DEFINE_PROP_INT32 and initializing to -1 in scsi_block_realize (just
like for scsi_generic_realize), but for now we can keep it.  My usecase
was more to downgrade scsi_version from newer to 2.

I agree. +1 for pulling the patch series as is.




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