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[Qemu-devel] [PATCH 0/5] *** SUBJECT HERE ***
From: |
Nicholas A. Bellinger |
Subject: |
[Qemu-devel] [PATCH 0/5] *** SUBJECT HERE *** |
Date: |
Mon, 14 Jun 2010 02:44:04 -0700 |
From: Nicholas Bellinger <address@hidden>
Greetings Gerd, Hannes and co,
This series adds initial support for a hw/scsi-bsg.c backstore for scsi-bus
compatible HBA emulation in QEMU-KVM on Linux hosts supporting the BSG driver.
This code 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/scsi-bsg
Note that this initial code is being posted for review and to see how useful a
BSG backstore
would be for QEMU-KVM and Linux hosts. 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
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.
So far this patch series has been tested with a Linux based x86_64 KVM host and
guest
using the hw/megasas.c 8708EM2 HBA Emulation with TCM_Loop virtual SAS Port
LUNs.
Comments are welcome,
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 support for scsi-bus and scsi-disk
[scsi-bsg]: Add initial support for BSG based SCSIDeviceInfo
Makefile.objs | 2 +-
block.c | 23 ++-
block.h | 1 +
block/raw-posix-aio.h | 3 +
block/raw-posix.c | 17 ++-
block/raw.c | 20 ++
block_int.h | 5 +
hw/scsi-bsg.c | 588 +++++++++++++++++++++++++++++++++++++++++++++++++
hw/scsi-bus.c | 3 +-
hw/scsi-disk.c | 4 +
posix-aio-compat.c | 28 +++
11 files changed, 687 insertions(+), 7 deletions(-)
create mode 100644 hw/scsi-bsg.c
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