Public bug reported: Dexuan Cui of Microsoft has submitted upstream the a VM Sockets for Hyper-V feature. The V6 series of this feature set was submitted on January 26th so it seems likely that the discussion is winding down and the feature is ripe for inclusion. We'd like it considered for Ubuntu 16.04.
Here's the latest Part 0 description from lkml: From: Dexuan Cui [email protected] via vger.kernel.org Changes since v1: - updated "[PATCH 6/7] hvsock: introduce Hyper-V VM Sockets feature" - added __init and __exit for the module init/exit functions - net/hv_sock/Kconfig: "default m" -> "default m if HYPERV" - MODULE_LICENSE: "Dual MIT/GPL" -> "Dual BSD/GPL" Changes since v2: - fixed various coding issue pointed out by David Miller - fixed indentation issues - removed pr_debug in net/hv_sock/af_hvsock.c - used reverse-Chrismas-tree style for local variables. - EXPORT_SYMBOL -> EXPORT_SYMBOL_GPL Changes since v3: - fixed a few coding issue pointed by Vitaly Kuznetsov and Dan Carpenter - fixed the ret value in vmbus_recvpacket_hvsock on error - fixed the style of multi-line comment: vmbus_get_hvsock_rw_status() Changes since v4 (https://lkml.org/lkml/2015/7/28/404): - addressed all the comments about V4. - treat the hvsock offers/channels as special VMBus devices - add a mechanism to pass hvsock events to the hvsock driver - fixed some corner cases with proper locking when a connection is closed - rebased to the latest Greg's tree Changes since v5 (https://lkml.org/lkml/2015/12/24/103): - addressed the coding style issues (Vitaly Kuznetsov & David Miller, thanks!) - used a better coding for the per-channel rescind callback (Thank Vitaly!) - avoided the introduction of new VMBUS driver APIs vmbus_sendpacket_hvsock() and vmbus_recvpacket_hvsock() and used vmbus_sendpacket()/vmbus_recvpacket() in the higher level (i.e., the vmsock driver). Thank Vitaly! Hyper-V VM Socket (hv_sock) is a byte-stream based communication mechanism between Windowsd 10 (or later) host and a guest. It's kind of TCP over VMBus, but the transportation layer (VMBus) is much simpler than IP. With Hyper-V VM Sockets, applications between the host and a guest can talk with each other directly by the traditional BSD-style socket APIs. The patchset implements the necessary support in the guest side by adding the necessary new APIs in the vmbus driver, and introducing a new driver hv_sock.ko, which implements_a new socket address family AF_HYPERV. I know the kernel has already had a VM Sockets driver (AF_VSOCK) based on VMware's VMCI (net/vmw_vsock/, drivers/misc/vmw_vmci), and KVM is proposing AF_VSOCK of virtio version: http://thread.gmane.org/gmane.linux.network/365205. However, though Hyper-V VM Sockets may seem conceptually similar to AF_VOSCK, there are differences in the transportation layer, and IMO these make the direct code reusing impractical: 1. In AF_VSOCK, the endpoint type is: <u32 ContextID, u32 Port>, but in AF_HYPERV, the endpoint type is: <GUID VM_ID, GUID ServiceID>. Here GUID is 128-bit. 2. AF_VSOCK supports SOCK_DGRAM, while AF_HYPERV doesn't. 3. AF_VSOCK supports some special sock opts, like SO_VM_SOCKETS_BUFFER_SIZE, SO_VM_SOCKETS_BUFFER_MIN/MAX_SIZE and SO_VM_SOCKETS_CONNECT_TIMEOUT. These are meaningless to AF_HYPERV. 4. Some AF_VSOCK's VMCI transportation ops are meanless to AF_HYPERV/VMBus, like .notify_recv_init .notify_recv_pre_block .notify_recv_pre_dequeue .notify_recv_post_dequeue .notify_send_init .notify_send_pre_block .notify_send_pre_enqueue .notify_send_post_enqueue etc. So I think we'd better introduce a new address family: AF_HYPERV. Please review the patchset. Looking forward to your comments! Dexuan Cui (9): Drivers: hv: vmbus: add a helper function to set a channel's pending send size Drivers: hv: vmbus: define the new offer type for Hyper-V socket (hvsock) Drivers: hv: vmbus: define a new VMBus message type for hvsock Drivers: hv: ring_buffer: enhance hv_ringbuffer_read() to support hvsock Drivers: hv: vmbus: add APIs to send/recv hvsock packets Drivers: hv: vmbus: add a hvsock flag in struct hv_driver Drivers: hv: vmbus: add a mechanism to pass hvsock events to the hvsock driver Drivers: hv: vmbus: add an API vmbus_hvsock_device_unregister() hvsock: introduce Hyper-V VM Sockets feature MAINTAINERS | 2 + drivers/hv/channel.c | 84 ++- drivers/hv/channel_mgmt.c | 53 +- drivers/hv/connection.c | 4 +- drivers/hv/hyperv_vmbus.h | 13 +- drivers/hv/ring_buffer.c | 54 +- drivers/hv/vmbus_drv.c | 4 + include/linux/hyperv.h | 88 +++ include/linux/socket.h | 4 +- include/net/af_hvsock.h | 44 ++ include/uapi/linux/hyperv.h | 16 + net/Kconfig | 1 + net/Makefile | 1 + net/hv_sock/Kconfig | 10 + net/hv_sock/Makefile | 3 + net/hv_sock/af_hvsock.c | 1473 +++++++++++++++++++++++++++++++++++++++++++ 16 files changed, 1830 insertions(+), 24 deletions(-) create mode 100644 include/net/af_hvsock.h create mode 100644 net/hv_sock/Kconfig create mode 100644 net/hv_sock/Makefile create mode 100644 net/hv_sock/af_hvsock.c -- 2.1.4 Dexuan Cui (8): Drivers: hv: vmbus: add a helper function to set a channel's pending send size Drivers: hv: vmbus: define the new offer type for Hyper-V socket (hvsock) Drivers: hv: vmbus: vmbus_sendpacket_ctl: hvsock: avoid unnecessary signaling Drivers: hv: vmbus: define a new VMBus message type for hvsock Drivers: hv: vmbus: add a hvsock flag in struct hv_driver Drivers: hv: vmbus: add a per-channel rescind callback Drivers: hv: vmbus: add an API vmbus_hvsock_device_unregister() hvsock: introduce Hyper-V Socket feature MAINTAINERS | 2 + drivers/hv/channel.c | 21 +- drivers/hv/channel_mgmt.c | 46 +- drivers/hv/connection.c | 4 +- drivers/hv/vmbus_drv.c | 4 + include/linux/hyperv.h | 67 ++ include/linux/socket.h | 4 +- include/net/af_hvsock.h | 51 ++ include/uapi/linux/hyperv.h | 16 + net/Kconfig | 1 + net/Makefile | 1 + net/hv_sock/Kconfig | 10 + net/hv_sock/Makefile | 3 + net/hv_sock/af_hvsock.c | 1480 +++++++++++++++++++++++++++++++++++++++++++ 14 files changed, 1702 insertions(+), 8 deletions(-) create mode 100644 include/net/af_hvsock.h create mode 100644 net/hv_sock/Kconfig create mode 100644 net/hv_sock/Makefile create mode 100644 net/hv_sock/af_hvsock.c There are, as yet, no pieces of this upstream submitted committed to Linus's tree. ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1541585 Title: [Hyper-V] VM Sockets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1541585/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
