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Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extensi
From: |
Alex Bligh |
Subject: |
Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension |
Date: |
Thu, 24 Mar 2016 10:32:25 +0000 |
On 24 Mar 2016, at 09:33, Wouter Verhelst <address@hidden> wrote:
> Now I'm not saying we
> need to fully define what it means for a part of the backend to be
> "dirty" or not. It's okay to leave part of the meaning in the dark,
> leaving that implementation-defined.
Well, the 3 possible states are:
* unallocated
* zero
* non-zero
So the possible replies are a bitfield of those, with a '1' if it 'might'
be in that state, i.e.
111 = no idea
110 = might be zero or unallocated, but isn't zero
011 = I know it's allocated, but I don't know whether it is zero or not
And '000' is not permitted!
etc.
--
Alex Bligh
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- Re: [Qemu-devel] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, (continued)
Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Wouter Verhelst, 2016/03/23
- Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Kevin Wolf, 2016/03/23
- Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Pavel Borzenkov, 2016/03/24
- Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Wouter Verhelst, 2016/03/24
- Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Pavel Borzenkov, 2016/03/24
- Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Wouter Verhelst, 2016/03/24
Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Pavel Borzenkov, 2016/03/24
Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Wouter Verhelst, 2016/03/24
Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension,
Alex Bligh <=
Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Paolo Bonzini, 2016/03/24
Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Alex Bligh, 2016/03/24
Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Paolo Bonzini, 2016/03/24
Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Alex Bligh, 2016/03/24
Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Paolo Bonzini, 2016/03/24
Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Paolo Bonzini, 2016/03/24
Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Eric Blake, 2016/03/24
Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Paolo Bonzini, 2016/03/24
Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Wouter Verhelst, 2016/03/24
Re: [Qemu-devel] [Nbd] [PATCH 2/2] NBD proto: add GET_LBA_STATUS extension, Eric Blake, 2016/03/24