Commit f12c1ebd authored by Felipe Franciosi's avatar Felipe Franciosi Committed by Paolo Bonzini
Browse files

vhost-user-scsi: Introduce vhost-user-scsi host device 



This commit introduces a vhost-user device for SCSI. This is based
on the existing vhost-scsi implementation, but done over vhost-user
instead. It also uses a chardev to connect to the backend. Unlike
vhost-scsi (today), VMs using vhost-user-scsi can be live migrated.

To use it, start Qemu with a command line equivalent to:

qemu-system-x86_64 \
       -chardev socket,id=vus0,path=/tmp/vus.sock \
       -device vhost-user-scsi-pci,chardev=vus0,bus=pci.0,addr=...

A separate commit presents a sample application linked with libiscsi to
provide a backend for vhost-user-scsi.

Signed-off-by: default avatarFelipe Franciosi <felipe@nutanix.com>
Message-Id: <1488479153-21203-4-git-send-email-felipe@nutanix.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 44cb280d

.gitignore

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@@ -50,6 +50,7 @@ 
/qemu-version.h.tmp

/module_block.h

/vscclient

/vhost-user-scsi

/fsdev/virtfs-proxy-helper

*.[1-9]

*.a

default-configs/pci.mak

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@@ -43,3 +43,4 @@ CONFIG_VGA=y 
CONFIG_VGA_PCI=y

CONFIG_IVSHMEM=$(CONFIG_EVENTFD)

CONFIG_ROCKER=y

CONFIG_VHOST_USER_SCSI=$(CONFIG_LINUX)

default-configs/s390x-softmmu.mak

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CONFIG_PCI=y

CONFIG_VIRTIO_PCI=y

CONFIG_VHOST_USER_SCSI=$(CONFIG_LINUX)

CONFIG_VIRTIO=y

CONFIG_SCLPCONSOLE=y

CONFIG_TERMINAL3270=y

hw/scsi/Makefile.objs

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@@ -11,4 +11,5 @@ obj-$(CONFIG_PSERIES) += spapr_vscsi.o 
ifeq ($(CONFIG_VIRTIO),y)

obj-y += virtio-scsi.o virtio-scsi-dataplane.o

obj-$(CONFIG_VHOST_SCSI) += vhost-scsi-common.o vhost-scsi.o

obj-$(CONFIG_VHOST_USER_SCSI) += vhost-scsi-common.o vhost-user-scsi.o

endif

hw/scsi/vhost-scsi-common.c

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@@ -16,7 +16,6 @@ 
 */



#include "qemu/osdep.h"

#include <linux/vhost.h>

#include "qapi/error.h"

#include "qemu/error-report.h"

#include "migration/migration.h"