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[Qemu-devel] Re: [PATCH 0/5]: Add hw/scsi-bsg.c backend driver
From: |
Boaz Harrosh |
Subject: |
[Qemu-devel] Re: [PATCH 0/5]: Add hw/scsi-bsg.c backend driver |
Date: |
Wed, 24 Nov 2010 11:31:03 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.15) Gecko/20101027 Fedora/3.0.10-1.fc12 Thunderbird/3.0.10 |
On 11/24/2010 10:44 AM, Nicholas A. Bellinger wrote:
> From: Nicholas Bellinger <address@hidden>
>
> <Quick resend with proper subject>
>
> Greetings QEMU SCSI / BLOCK folks,
>
> This series adds rebased support for the hw/scsi-bsg.c backstore for scsi-bus
> compatible HBA emulation in QEMU-KVM on Linux hosts supporting the BSG driver
> against current mainline qemu-kvm.git/master code.
>
> This patch is available from the scsi-bsg branch in the megasas/scsi friendly
> QEMU-KVM tree at:
>
> http://git.kernel.org/?p=virt/kvm/nab/qemu-kvm.git;a=shortlog;h=refs/heads/megasas-upstream-v1
>
> which includes Hannes's recent patch series posted recently against mainline
> v0.13.0 here:
>
> Re: [Qemu-devel] [PATCH] Megasas HBA emulation and SCSI update v.2
> http://lists.gnu.org/archive/html/qemu-devel/2010-11/msg02018.html
>
> Note that in order for BSG I/O to function using vectored AIO a kernel patch
> to
> linux/block/bsg.c:bsg_map_hdr() is currently required running on a bit paired
> user/kernel enviroment. The kernel patch in question is here:
>
> http://marc.info/?l=linux-scsi&m=127649585524598&w=2
>
OK I've looked at this patch. I have sent such a patch my self and Pete Wyckoff
and other people have sent it as well. I could not find in the URL above any
response to your patch. Where there any?
Thanks
Boaz
> The first three patches involve updating block code to support the BSG
> backstore for scsi-bsg.
>
> The forth patch adds the minor changes to hw/scsi-bus.c and hw/scsi-disk.c in
> order to
> function with scsi-bsg.
>
> And the fifth patch adds the main hw/scsi-bsg.c logic necessary to run the
> new struct
> SCSIDeviceInfo and for BSG AIO using struct iovec and paio_submit_len() to
> function.
> The scsi-bsg.c code has been refactored to follow the modern
> SCSIDeviceInfo->alloc_req_iov()
> and incoming struct iovec * memory for underlying SCSIRequest SGLs
>
> So far this has been tested with v2 8708EM2 HBA Emulation on 0.13.0 on a
> .37-rc2
> KVM host with TCM_Loop FILEIO backstores into a Debian Lenny v2.6.26 x86_64
> KVM guest with XFS filesystem mounts.
>
> Signed-off-by: Nicholas A. Bellinger <address@hidden>
>
> Nicholas Bellinger (5):
> block: Add top level BSG support
> block: Add BSG qemu_open() in block/raw.c:raw_open()
> block: Add paio_submit_len() non sector sized AIO
> scsi: Add BSG checks into scsi-bus and scsi-disk
> scsi-bsg: Add initial support for BSG based SCSIDeviceInfo
>
> Makefile.objs | 2 +-
> block.c | 7 +-
> block.h | 1 +
> block/raw-posix-aio.h | 3 +
> block/raw-posix.c | 65 +++++-
> block/raw.c | 21 ++
> block_int.h | 6 +
> hw/scsi-bsg.c | 720
> +++++++++++++++++++++++++++++++++++++++++++++++++
> hw/scsi-bus.c | 3 +-
> hw/scsi-disk.c | 5 +
> posix-aio-compat.c | 29 ++
> 11 files changed, 855 insertions(+), 7 deletions(-)
> create mode 100644 hw/scsi-bsg.c
>