v2: * Only enable this feauture for Linux for eventfd is a Linux-specific feature
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
