From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=53531 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PLBjG-0002qE-Jm for qemu-devel@nongnu.org; Wed, 24 Nov 2010 04:33:38 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PLBgz-0002jo-HC for qemu-devel@nongnu.org; Wed, 24 Nov 2010 04:32:01 -0500 Received: from daytona.panasas.com ([67.152.220.89]:35871) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PLBgz-0002hq-Br for qemu-devel@nongnu.org; Wed, 24 Nov 2010 04:31:09 -0500 Message-ID: <4CECDB57.8040406@panasas.com> Date: Wed, 24 Nov 2010 11:31:03 +0200 From: Boaz Harrosh MIME-Version: 1.0 References: <1290588274-8975-1-git-send-email-nab@linux-iscsi.org> In-Reply-To: <1290588274-8975-1-git-send-email-nab@linux-iscsi.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] Re: [PATCH 0/5]: Add hw/scsi-bsg.c backend driver List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: linux-iscsi-target-dev@googlegroups.com Cc: Kevin Wolf , Pete Wyckoff , Stefan Hajnoczi , qemu-devel , "Nicholas A. Bellinger" , Hannes Reinecke , Paolo Bonzini , Christoph Hellwig , Gerd Hoffmann On 11/24/2010 10:44 AM, Nicholas A. Bellinger wrote: > From: Nicholas Bellinger > > > > 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 > > 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 >