This patch series is an implementation of vhost-user-backend server, thanks to
Stefan's guidance after reviewing the draft version and the instructions on
https://wiki.qemu.org/Google_Summer_of_Code_2019#vhost-user-blk_device_backend,
Vhost-user-backend server is a UserCreatable object and can be started using
object_add,
(qemu) object_add
vhost-user-server,id=ID,unix_socket=/tmp/vhost-user-blk_vhost.socket,name=DRIVE_NAME,writable=off
(qemu) object_del ID
or appending the "-object" option when starting QEMU,
$ -object
vhost-user-server,id=disk,unix_socket=/tmp/vhost-user-blk_vhost.socket,name=disk,writable=off
Then vhost-user client can connect to the server backend. For example, QEMU
could act as a client,
$ -m 256 -object memory-backend-memfd,id=mem,size=256M,share=on -numa
node,memdev=mem -chardev socket,id=char1,path=/tmp/vhost-user-blk_vhost.socket
-device vhost-user-blk-pci,id=blk0,chardev=char1
And guest OS could access this vhost-user block device after mouting it.
patches are against commit 035eed4c0d257c905a556fa0f4865a0c077b4e7f.
Coiby Xu (5):
vhost-user block device backend
extend libvhost to support IOThread
a standone-alone tool to directly share disk image file via vhost-user
protocol
new qTest case for the vhost-user-blk device backend
building configuration files changes
Makefile | 1 +
Makefile.objs | 2 +-
Makefile.target | 1 +
blockdev-vu.c | 1008 +++++++++++++++++++++++++
configure | 2 +-
contrib/libvhost-user/libvhost-user.c | 64 +-
contrib/libvhost-user/libvhost-user.h | 36 +-
include/block/vhost-user.h | 46 ++
qemu-vu.c | 264 +++++++
tests/Makefile.include | 5 +-
tests/libqos/vhost-user-blk.c | 125 +++
tests/libqos/vhost-user-blk.h | 44 ++
tests/vhost-user-blk-test.c | 691 +++++++++++++++++
vl.c | 4 +
14 files changed, 2277 insertions(+), 16 deletions(-)
create mode 100644 blockdev-vu.c
create mode 100644 include/block/vhost-user.h
create mode 100644 qemu-vu.c
create mode 100644 tests/libqos/vhost-user-blk.c
create mode 100644 tests/libqos/vhost-user-blk.h
create mode 100644 tests/vhost-user-blk-test.c
--
2.24.1
