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[Qemu-devel] Re: [PATCH 0/5]: Add hw/scsi-bsg.c backend driver
From: |
Nicholas A. Bellinger |
Subject: |
[Qemu-devel] Re: [PATCH 0/5]: Add hw/scsi-bsg.c backend driver |
Date: |
Wed, 24 Nov 2010 01:45:27 -0800 |
On Wed, 2010-11-24 at 11:31 +0200, Boaz Harrosh wrote:
> 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?
Hi Boaz,
I found Tomo-san's follow here:
http://ns3.spinics.net/lists/linux-scsi/msg44266.html
>
> 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
> >
>