v10
- Use a linked list of VuFdWatch objects to keep kick info [Stefan]
- Merge improvements and fixes from Stefan
- Rename libvhost-user's vu_message_read to vu_message_read_default [Kevin]
- When shutting down the client, wait for the coroutine of processing
vhost-user messages to be finished [Kevin]
- Allocate struct req_data on the heap [Kevin]
- Improve coding of qtest case [Thomas]
- Fix several memory leaks detected by ASAN
v9
- move logical block size check function to a utility function
- fix issues regarding license, coding style, memory deallocation, etc.
v8
- re-try connecting to socket server to fix asan error
- fix license naming issue
v7
- fix docker-test-debug@fedora errors by freeing malloced memory
v6
- add missing license header and include guard
- vhost-user server only serve one client one time
- fix a bug in custom vu_message_read
- using qemu-storage-daemon to start vhost-user-blk-server
- a bug fix to pass docker-test-clang@ubuntu
v5:
* re-use vu_kick_cb in libvhost-user
* keeping processing VhostUserMsg in the same coroutine until there is
detachment/attachment of AIOContext
* Spawn separate coroutine for each VuVirtqElement
* Other changes including relocating vhost-user-blk-server.c, coding
style etc.
v4:
* add object properties in class_init
* relocate vhost-user-blk-test
* other changes including using SocketAddress, coding style, etc.
v3:
* separate generic vhost-user-server code from vhost-user-blk-server
code
* re-write vu_message_read and kick hander function as coroutines to
directly call blk_co_preadv, blk_co_pwritev, etc.
* add aio_context notifier functions to support multi-threading model
* other fixes regarding coding style, warning report, etc.
v2:
* Only enable this feature for Linux because eventfd is a Linux-specific
feature
This patch series is an implementation of vhost-user block device
backend server, thanks to Stefan and Kevin's guidance.
Vhost-user block device backend server is a UserCreatable object and can be
started using object_add,
(qemu) object_add
vhost-user-blk-server,id=ID,unix-socket=/tmp/vhost-user-blk_vhost.socket,node-name=DRIVE_NAME,writable=off,logical-block-size=512
(qemu) object_del ID
or appending the "-object" option when starting QEMU,
$ -object
vhost-user-blk-server,id=disk,unix-socket=/tmp/vhost-user-blk_vhost.socket,node-name=DRIVE_NAME,writable=off,logical-block-size=512
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 mounting it.
Coiby Xu (7):
libvhost-user: Allow vu_message_read to be replaced
libvhost-user: remove watch for kick_fd when de-initialize vu-dev
util/vhost-user-server: generic vhost user server
block: move logical block size check function to a common utility
function
block/export: vhost-user block device backend server
test: new qTest case to test the vhost-user-blk-server
MAINTAINERS: Add vhost-user block device backend server maintainer
MAINTAINERS | 8 +
block/export/vhost-user-blk-server.c | 661 ++++++++++++++++++
block/export/vhost-user-blk-server.h | 36 +
block/meson.build | 1 +
contrib/libvhost-user/libvhost-user-glib.c | 2 +-
contrib/libvhost-user/libvhost-user.c | 15 +-
contrib/libvhost-user/libvhost-user.h | 21 +
hw/core/qdev-properties.c | 31 +-
softmmu/vl.c | 4 +
tests/qtest/libqos/libqtest.h | 17 +
tests/qtest/libqos/meson.build | 1 +
tests/qtest/libqos/vhost-user-blk.c | 129 ++++
tests/qtest/libqos/vhost-user-blk.h | 48 ++
tests/qtest/libqtest.c | 36 +-
tests/qtest/meson.build | 4 +-
tests/qtest/vhost-user-blk-test.c | 751 +++++++++++++++++++++
tests/vhost-user-bridge.c | 2 +
tools/virtiofsd/fuse_virtio.c | 4 +-
util/block-helpers.c | 46 ++
util/block-helpers.h | 19 +
util/meson.build | 2 +
util/vhost-user-server.c | 428 ++++++++++++
util/vhost-user-server.h | 65 ++
23 files changed, 2292 insertions(+), 39 deletions(-)
create mode 100644 block/export/vhost-user-blk-server.c
create mode 100644 block/export/vhost-user-blk-server.h
create mode 100644 tests/qtest/libqos/vhost-user-blk.c
create mode 100644 tests/qtest/libqos/vhost-user-blk.h
create mode 100644 tests/qtest/vhost-user-blk-test.c
create mode 100644 util/block-helpers.c
create mode 100644 util/block-helpers.h
create mode 100644 util/vhost-user-server.c
create mode 100644 util/vhost-user-server.h
--
2.28.0
