On Wed, Dec 09, 2015 at 08:03:49PM +0800, Stefan Hajnoczi wrote: > Note: the virtio-vsock device specification is currently under review but not > yet finalized. Please review this code but don't merge until I send an update > when the spec is finalized. Thanks! Yes, this should have RFC in the subject. > v3: > * Remove unnecessary 3-way handshake, just do REQUEST/RESPONSE instead > of REQUEST/RESPONSE/ACK > * Remove SOCK_DGRAM support and focus on SOCK_STREAM first > (also drop v2 Patch 1, it's only needed for SOCK_DGRAM) > * Only allow host->guest connections (same security model as latest > VMware) > * Don't put vhost vsock driver into staging > * Add missing Kconfig dependencies (Arnd Bergmann <arnd@xxxxxxxx>) > * Remove unneeded variable used to store return value > (Fengguang Wu <fengguang.wu@xxxxxxxxx> and Julia Lawall > <julia.lawall@xxxxxxx>) > > v2: > * Rebased onto Linux v4.4-rc2 > * vhost: Refuse to assign reserved CIDs > * vhost: Refuse guest CID if already in use > * vhost: Only accept correctly addressed packets (no spoofing!) > * vhost: Support flexible rx/tx descriptor layout > * vhost: Add missing total_tx_buf decrement > * virtio_transport: Fix total_tx_buf accounting > * virtio_transport: Add virtio_transport global mutex to prevent races > * common: Notify other side of SOCK_STREAM disconnect (fixes shutdown > semantics) > * common: Avoid recursive mutex_lock(tx_lock) for write_space (fixes deadlock) > * common: Define VIRTIO_VSOCK_TYPE_STREAM/DGRAM hardware interface constants > * common: Define VIRTIO_VSOCK_SHUTDOWN_RCV/SEND hardware interface constants > * common: Fix peer_buf_alloc inheritance on child socket > > This patch series adds a virtio transport for AF_VSOCK (net/vmw_vsock/). > AF_VSOCK is designed for communication between virtual machines and > hypervisors. It is currently only implemented for VMware's VMCI transport. > > This series implements the proposed virtio-vsock device specification from > here: > http://permalink.gmane.org/gmane.comp.emulators.virtio.devel/980 > > Most of the work was done by Asias He and Gerd Hoffmann a while back. I have > picked up the series again. > > The QEMU userspace changes are here: > https://github.com/stefanha/qemu/commits/vsock > > Why virtio-vsock? > ----------------- > Guest<->host communication is currently done over the virtio-serial device. > This makes it hard to port sockets API-based applications and is limited to > static ports. > > virtio-vsock uses the sockets API so that applications can rely on familiar > SOCK_STREAM semantics. Applications on the host can easily connect to guest > agents because the sockets API allows multiple connections to a listen socket > (unlike virtio-serial). This simplifies the guest<->host communication and > eliminates the need for extra processes on the host to arbitrate virtio-serial > ports. > > Overview > -------- > This series adds 3 pieces: > > 1. virtio_transport_common.ko - core virtio vsock code that uses vsock.ko > > 2. virtio_transport.ko - guest driver > > 3. drivers/vhost/vsock.ko - host driver > > Howto > ----- > The following kernel options are needed: > CONFIG_VSOCKETS=y > CONFIG_VIRTIO_VSOCKETS=y > CONFIG_VIRTIO_VSOCKETS_COMMON=y > CONFIG_VHOST_VSOCK=m > > Launch QEMU as follows: > # qemu ... -device vhost-vsock-pci,id=vhost-vsock-pci0,guest-cid=3 > > Guest and host can communicate via AF_VSOCK sockets. The host's CID (address) > is 2 and the guest must be assigned a CID (3 in the example above). > > Status > ------ > This patch series implements the latest draft specification. Please review. > > Asias He (4): > VSOCK: Introduce virtio-vsock-common.ko > VSOCK: Introduce virtio-vsock.ko > VSOCK: Introduce vhost-vsock.ko > VSOCK: Add Makefile and Kconfig > > drivers/vhost/Kconfig | 10 + > drivers/vhost/Makefile | 4 + > drivers/vhost/vsock.c | 628 +++++++++++++++++++++++ > drivers/vhost/vsock.h | 4 + > include/linux/virtio_vsock.h | 203 ++++++++ > include/uapi/linux/virtio_ids.h | 1 + > include/uapi/linux/virtio_vsock.h | 87 ++++ > net/vmw_vsock/Kconfig | 18 + > net/vmw_vsock/Makefile | 2 + > net/vmw_vsock/virtio_transport.c | 466 +++++++++++++++++ > net/vmw_vsock/virtio_transport_common.c | 854 ++++++++++++++++++++++++++++++++ > 11 files changed, 2277 insertions(+) > create mode 100644 drivers/vhost/vsock.c > create mode 100644 drivers/vhost/vsock.h > create mode 100644 include/linux/virtio_vsock.h > create mode 100644 include/uapi/linux/virtio_vsock.h > create mode 100644 net/vmw_vsock/virtio_transport.c > create mode 100644 net/vmw_vsock/virtio_transport_common.c > > -- > 2.5.0 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
