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X-Received-From: 2607:f8b0:4864:20::642 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, bharatlkmlkvm@gmail.com, Coiby Xu , stefanha@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 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 feauture 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,blk-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,blk-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 mouting it. Coiby Xu (5): extend libvhost to support IOThread and coroutine generic vhost user server vhost-user block device backend server a standone-alone tool to directly share disk image file via vhost-user protocol new qTest case to test the vhost-user-blk-server Makefile | 4 + Makefile.target | 1 + backends/Makefile.objs | 2 + backends/vhost-user-blk-server.c | 716 ++++++++++++++++++++++++++ backends/vhost-user-blk-server.h | 21 + configure | 3 + contrib/libvhost-user/libvhost-user.c | 54 +- contrib/libvhost-user/libvhost-user.h | 38 +- qemu-vu.c | 252 +++++++++ tests/libqos/vhost-user-blk.c | 126 +++++ tests/libqos/vhost-user-blk.h | 44 ++ tests/vhost-user-blk-test.c | 694 +++++++++++++++++++++++++ util/Makefile.objs | 3 + util/vhost-user-server.c | 429 ++++++++++++++++ util/vhost-user-server.h | 56 ++ vl.c | 4 + 16 files changed, 2440 insertions(+), 7 deletions(-) create mode 100644 backends/vhost-user-blk-server.c create mode 100644 backends/vhost-user-blk-server.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 create mode 100644 util/vhost-user-server.c create mode 100644 util/vhost-user-server.h -- 2.25.0