5e9be92d77
The WWPN specified in configfs is passed to "-device vhost-scsi-pci".
The tgpt field of the SET_ENDPOINT ioctl is obsolete now, so it is not
available from the QEMU command-line. Instead, I hardcode it to zero.
Changes in Patch-v2:
- Add vhost_scsi_get_features() in order to determine feature bits
supports by host kernel (mst + nab)
- Re-enable usage of DEFINE_VIRTIO_COMMON_FEATURES, and allow
EVENT_IDX to be disabled by host in vhost_scsi_get_features()
- Drop unused hotplug bit in DEFINE_VHOST_SCSI_PROPERTIES
Changes in Patch-v1:
- Set event_idx=off by default (nab, thanks asias)
- Disable hotplug feature bit for v3.9 tcm_vhost kernel code, need to
re-enable in v3.10 (nab)
- Update to latest qemu.git/master HEAD
Changes in WIP-V3:
- Drop ioeventfd vhost_scsi_properties (asias, thanks stefanha)
- Add CONFIG_VHOST_SCSI (asias, thanks stefanha)
- Add hotplug feature bit
Changes in WIP-V2:
- Add backend guest masking support (nab)
- Bump ABI_VERSION to 1 (nab)
- Set up set_guest_notifiers (asias)
- Set up vs->dev.vq_index (asias)
- Drop vs->vs.vdev.{set,clear}_vhost_endpoint (asias)
- Drop VIRTIO_CONFIG_S_DRIVER check in vhost_scsi_set_status (asias)
Howto:
Use the latest seabios, at least commit b44a7be17b
git clone git://git.seabios.org/seabios.git
make
cp out/bios.bin /usr/share/qemu/bios.bin
qemu -device vhost-scsi-pci,wwpn=naa.6001405bd4e8476d,event_idx=off
...
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Asias He <asias@redhat.com>
[ Rebase on top of VirtIOSCSICommon patch, fix bugs in feature
negotiation and irqfd masking - Paolo ]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
/*
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* vhost_scsi host device
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*
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* Copyright IBM, Corp. 2011
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*
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* Authors:
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* Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU LGPL, version 2 or later.
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* See the COPYING.LIB file in the top-level directory.
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*
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*/
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#ifndef VHOST_SCSI_H
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#define VHOST_SCSI_H
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#include "qemu-common.h"
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#include "hw/qdev.h"
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#include "hw/virtio/virtio-scsi.h"
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#include "hw/virtio/vhost.h"
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/*
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* Used by QEMU userspace to ensure a consistent vhost-scsi ABI.
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*
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* ABI Rev 0: July 2012 version starting point for v3.6-rc merge candidate +
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* RFC-v2 vhost-scsi userspace. Add GET_ABI_VERSION ioctl usage
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* ABI Rev 1: January 2013. Ignore vhost_tpgt filed in struct vhost_scsi_target.
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* All the targets under vhost_wwpn can be seen and used by guest.
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*/
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#define VHOST_SCSI_ABI_VERSION 1
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/* TODO #include <linux/vhost.h> properly */
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/* For VHOST_SCSI_SET_ENDPOINT/VHOST_SCSI_CLEAR_ENDPOINT ioctl */
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struct vhost_scsi_target {
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int abi_version;
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char vhost_wwpn[224];
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unsigned short vhost_tpgt;
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unsigned short reserved;
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};
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enum vhost_scsi_vq_list {
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VHOST_SCSI_VQ_CONTROL = 0,
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VHOST_SCSI_VQ_EVENT = 1,
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VHOST_SCSI_VQ_NUM_FIXED = 2,
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};
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#define VHOST_VIRTIO 0xAF
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#define VHOST_SCSI_SET_ENDPOINT _IOW(VHOST_VIRTIO, 0x40, struct vhost_scsi_target)
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#define VHOST_SCSI_CLEAR_ENDPOINT _IOW(VHOST_VIRTIO, 0x41, struct vhost_scsi_target)
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#define VHOST_SCSI_GET_ABI_VERSION _IOW(VHOST_VIRTIO, 0x42, int)
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#define TYPE_VHOST_SCSI "vhost-scsi"
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#define VHOST_SCSI(obj) \
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OBJECT_CHECK(VHostSCSI, (obj), TYPE_VHOST_SCSI)
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typedef struct VHostSCSI {
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VirtIOSCSICommon parent_obj;
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Error *migration_blocker;
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struct vhost_dev dev;
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} VHostSCSI;
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#define DEFINE_VHOST_SCSI_PROPERTIES(_state, _conf_field) \
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DEFINE_PROP_STRING("vhostfd", _state, _conf_field.vhostfd), \
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DEFINE_PROP_STRING("wwpn", _state, _conf_field.wwpn), \
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DEFINE_PROP_UINT32("num_queues", _state, _conf_field.num_queues, 1), \
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DEFINE_PROP_UINT32("max_sectors", _state, _conf_field.max_sectors, 0xFFFF), \
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DEFINE_PROP_UINT32("cmd_per_lun", _state, _conf_field.cmd_per_lun, 128)
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#endif
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