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Re: [Qemu-devel] [PATCH 0/4] ISCSI: Passthough updates
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH 0/4] ISCSI: Passthough updates |
Date: |
Sat, 26 May 2012 09:37:44 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 |
Il 26/05/2012 06:56, Ronnie Sahlberg ha scritto:
> Paolo, list
>
> Please find a set of patches for iscsi.
>
> 1, The recent change to the eventsystem in iscsi is racy. If the
> async connect of the socket takes longer than almost instant, the
> shortcircuit trying to write directly to the socket may try to do so
> before the socket is established. So we hcange the logic here and
> ONLY try the shortcircuit avoiding setting up POLLOUT if we have been
> fully logged in.
>
> This avoids the race where we might crash if the socket is not yet
> connected.
>
> 2, Swithc to using READCAPACITY10 for MMC devices. Only SBC devices
> support READCAPACITY16 so far.
>
> 3, Switch to use READ10 for MMC devices instead of READ16. With this
> patch ISCSI and MMC devices now work correctly.
>
> 4, If the device is a SMC device, then force the device to be sg. We
> dont support emulation as far as i know for SMV devices, so these
> device types would only work for sg or iscsi passthrough anyway. The
> reason we need to forcer sg is that since we can not READ from a SMC
> device, we need to shortcircuit find_image_format() before it tries
> to do the bdrv_pread() trying to guess what format the image is.
>
> With this patch I have verified I can access and manage a media
> changer via iscsi-passthrough.
Applied 1-2 to scsi-next branch for 1.1, 3 for 1.2.
Paolo
- [Qemu-devel] [PATCH 0/4] ISCSI: Passthough updates, Ronnie Sahlberg, 2012/05/26
- [Qemu-devel] [PATCH 1/4] ISCSI: Only call READCAPACITY16 for SBC devices, Ronnie Sahlberg, 2012/05/26
- [Qemu-devel] [PATCH 2/4] ISCSI: Use READCAPACITY10 for MMC devices, Ronnie Sahlberg, 2012/05/26
- [Qemu-devel] [PATCH 3/4] ISCSI: Only use READ16 for SBC devices. Use READ10 for other device types such as MMC, Ronnie Sahlberg, 2012/05/26
- [Qemu-devel] [PATCH 4/4] ISCSI: If the device we open is a SMC device, then force the use of sg. We dont have any medium changer emulation so only passthrough via real sg or scsi-generic via iscsi would work anyway., Ronnie Sahlberg, 2012/05/26
- Re: [Qemu-devel] [PATCH 4/4] ISCSI: If the device we open is a SMC device, then force the use of sg. We dont have any medium changer emulation so only passthrough via real sg or scsi-generic via iscsi would work anyway., Paolo Bonzini, 2012/05/26
- Re: [Qemu-devel] [PATCH 4/4] ISCSI: If the device we open is a SMC device, then force the use of sg. We dont have any medium changer emulation so only passthrough via real sg or scsi-generic via iscsi would work anyway., Andreas Färber, 2012/05/27
- Re: [Qemu-devel] [PATCH 4/4] ISCSI: If the device we open is a SMC device, then force the use of sg. We dont have any medium changer emulation so only passthrough via real sg or scsi-generic via iscsi would work anyway., Paolo Bonzini, 2012/05/28
- Re: [Qemu-devel] [PATCH 4/4] ISCSI: If the device we open is a SMC device, then force the use of sg. We dont have any medium changer emulation so only passthrough via real sg or scsi-generic via iscsi would work anyway., ronnie sahlberg, 2012/05/28
- Re: [Qemu-devel] [PATCH 4/4] ISCSI: If the device we open is a SMC device, then force the use of sg. We dont have any medium changer emulation so only passthrough via real sg or scsi-generic via iscsi would work anyway., Paolo Bonzini, 2012/05/28
Re: [Qemu-devel] [PATCH 0/4] ISCSI: Passthough updates,
Paolo Bonzini <=