[azure 4.13][PATCH 05/19] Revert "UBUNTU: SAUCE: hv_sock: implements Hyper-V transport for Virtual Sockets (AF_VSOCK)"
Marcelo Henrique Cerri
marcelo.cerri at canonical.com
Tue Dec 12 15:41:54 UTC 2017
From: Dexuan Cui <decui at microsoft.com>
BugLink: http://bugs.launchpad.net/bugs/1736283
This reverts commit 7500c36601c8bfc772bef23a84038a163f29fadb.
Signed-off-by: Dexuan Cui <decui at microsoft.com>
Signed-off-by: Marcelo Henrique Cerri <marcelo.cerri at canonical.com>
---
MAINTAINERS | 1 -
net/vmw_vsock/Kconfig | 12 -
net/vmw_vsock/Makefile | 3 -
net/vmw_vsock/hyperv_transport.c | 829 ---------------------------------------
4 files changed, 845 deletions(-)
delete mode 100644 net/vmw_vsock/hyperv_transport.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 525af6faa126..749a119d5bc1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6292,7 +6292,6 @@ F: drivers/net/hyperv/
F: drivers/scsi/storvsc_drv.c
F: drivers/uio/uio_hv_generic.c
F: drivers/video/fbdev/hyperv_fb.c
-F: net/vmw_vsock/hyperv_transport.c
F: include/linux/hyperv.h
F: tools/hv/
F: Documentation/ABI/stable/sysfs-bus-vmbus
diff --git a/net/vmw_vsock/Kconfig b/net/vmw_vsock/Kconfig
index a24369d175fd..8831e7c42167 100644
--- a/net/vmw_vsock/Kconfig
+++ b/net/vmw_vsock/Kconfig
@@ -46,15 +46,3 @@ config VIRTIO_VSOCKETS_COMMON
This option is selected by any driver which needs to access
the virtio_vsock. The module will be called
vmw_vsock_virtio_transport_common.
-
-config HYPERV_VSOCKETS
- tristate "Hyper-V transport for Virtual Sockets"
- depends on VSOCKETS && HYPERV
- help
- This module implements a Hyper-V transport for Virtual Sockets.
-
- Enable this transport if your Virtual Machine host supports Virtual
- Sockets over Hyper-V VMBus.
-
- To compile this driver as a module, choose M here: the module will be
- called hv_sock. If unsure, say N.
diff --git a/net/vmw_vsock/Makefile b/net/vmw_vsock/Makefile
index e63d574234a9..09fc2eb29dc8 100644
--- a/net/vmw_vsock/Makefile
+++ b/net/vmw_vsock/Makefile
@@ -2,7 +2,6 @@ obj-$(CONFIG_VSOCKETS) += vsock.o
obj-$(CONFIG_VMWARE_VMCI_VSOCKETS) += vmw_vsock_vmci_transport.o
obj-$(CONFIG_VIRTIO_VSOCKETS) += vmw_vsock_virtio_transport.o
obj-$(CONFIG_VIRTIO_VSOCKETS_COMMON) += vmw_vsock_virtio_transport_common.o
-obj-$(CONFIG_HYPERV_VSOCKETS) += hv_sock.o
vsock-y += af_vsock.o af_vsock_tap.o vsock_addr.o
@@ -12,5 +11,3 @@ vmw_vsock_vmci_transport-y += vmci_transport.o vmci_transport_notify.o \
vmw_vsock_virtio_transport-y += virtio_transport.o
vmw_vsock_virtio_transport_common-y += virtio_transport_common.o
-
-hv_sock-y += hyperv_transport.o
diff --git a/net/vmw_vsock/hyperv_transport.c b/net/vmw_vsock/hyperv_transport.c
deleted file mode 100644
index fd89bf357617..000000000000
--- a/net/vmw_vsock/hyperv_transport.c
+++ /dev/null
@@ -1,829 +0,0 @@
-/*
- * Hyper-V transport for vsock
- *
- * Hyper-V Sockets supplies a byte-stream based communication mechanism
- * between the host and the VM. This driver implements the necessary
- * support in the VM by introducing the new vsock transport.
- *
- * Copyright (c) 2017, Microsoft Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- */
-#include <linux/module.h>
-#include <linux/vmalloc.h>
-#include <linux/hyperv.h>
-#include <net/sock.h>
-#include <net/af_vsock.h>
-
-/* The host side's design of the feature requires 6 exact 4KB pages for
- * recv/send rings respectively -- this is suboptimal considering memory
- * consumption, however unluckily we have to live with it, before the
- * host comes up with a better design in the future.
- */
-#define PAGE_SIZE_4K 4096
-#define RINGBUFFER_HVS_RCV_SIZE (PAGE_SIZE_4K * 6)
-#define RINGBUFFER_HVS_SND_SIZE (PAGE_SIZE_4K * 6)
-
-/* The MTU is 16KB per the host side's design */
-#define HVS_MTU_SIZE (1024 * 16)
-
-struct vmpipe_proto_header {
- u32 pkt_type;
- u32 data_size;
-};
-
-/* For recv, we use the VMBus in-place packet iterator APIs to directly copy
- * data from the ringbuffer into the userspace buffer.
- */
-struct hvs_recv_buf {
- /* The header before the payload data */
- struct vmpipe_proto_header hdr;
-
- /* The payload */
- u8 data[HVS_MTU_SIZE];
-};
-
-/* We can send up to HVS_MTU_SIZE bytes of payload to the host, but let's use
- * a small size, i.e. HVS_SEND_BUF_SIZE, to minimize the dynamically-allocated
- * buffer, because tests show there is no significant performance difference.
- *
- * Note: the buffer can be eliminated in the future when we add new VMBus
- * ringbuffer APIs that allow us to directly copy data from userspace buffer
- * to VMBus ringbuffer.
- */
-#define HVS_SEND_BUF_SIZE (PAGE_SIZE_4K - sizeof(struct vmpipe_proto_header))
-
-struct hvs_send_buf {
- /* The header before the payload data */
- struct vmpipe_proto_header hdr;
-
- /* The payload */
- u8 data[HVS_SEND_BUF_SIZE];
-};
-
-#define HVS_HEADER_LEN (sizeof(struct vmpacket_descriptor) + \
- sizeof(struct vmpipe_proto_header))
-
-/* See 'prev_indices' in hv_ringbuffer_read(), hv_ringbuffer_write(), and
- * __hv_pkt_iter_next().
- */
-#define VMBUS_PKT_TRAILER (sizeof(u64))
-
-#define HVS_PKT_LEN(payload_len) (HVS_HEADER_LEN + \
- ALIGN((payload_len), 8) + \
- VMBUS_PKT_TRAILER)
-
-/* Per-socket state (accessed via vsk->trans) */
-struct hvsock {
- struct vsock_sock *vsk;
-
- uuid_le vm_srv_id;
- uuid_le host_srv_id;
-
- struct vmbus_channel *chan;
- struct vmpacket_descriptor *recv_desc;
-
- /* The length of the payload not delivered to userland yet */
- u32 recv_data_len;
- /* The offset of the payload */
- u32 recv_data_off;
-};
-
-/* In the VM, we support Hyper-V Sockets with AF_VSOCK, and the endpoint is
- * <cid, port> (see struct sockaddr_vm). Note: cid is not really used here:
- * when we write apps to connect to the host, we can only use VMADDR_CID_ANY
- * or VMADDR_CID_HOST (both are equivalent) as the remote cid, and when we
- * write apps to bind() & listen() in the VM, we can only use VMADDR_CID_ANY
- * as the local cid.
- *
- * On the host, Hyper-V Sockets are supported by Winsock AF_HYPERV:
- * https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/user-
- * guide/make-integration-service, and the endpoint is <VmID, ServiceId> with
- * the below sockaddr:
- *
- * struct SOCKADDR_HV
- * {
- * ADDRESS_FAMILY Family;
- * USHORT Reserved;
- * GUID VmId;
- * GUID ServiceId;
- * };
- * Note: VmID is not used by Linux VM and actually it isn't transmitted via
- * VMBus, because here it's obvious the host and the VM can easily identify
- * each other. Though the VmID is useful on the host, especially in the case
- * of Windows container, Linux VM doesn't need it at all.
- *
- * To make use of the AF_VSOCK infrastructure in Linux VM, we have to limit
- * the available GUID space of SOCKADDR_HV so that we can create a mapping
- * between AF_VSOCK port and SOCKADDR_HV Service GUID. The rule of writing
- * Hyper-V Sockets apps on the host and in Linux VM is:
- *
- ****************************************************************************
- * the only valid Service GUIDs, from the perspectives of both the host and *
- * Linux VM, that can be connected by the other end, must conform to this *
- * format: <port>-facb-11e6-bd58-64006a7986d3, and the "port" must be in *
- * this range [0, 0x7FFFFFFF]. *
- ****************************************************************************
- *
- * When we write apps on the host to connect(), the GUID ServiceID is used.
- * When we write apps in Linux VM to connect(), we only need to specify the
- * port and the driver will form the GUID and use that to request the host.
- *
- * From the perspective of Linux VM:
- * 1. the local ephemeral port (i.e. the local auto-bound port when we call
- * connect() without explicit bind()) is generated by __vsock_bind_stream(),
- * and the range is [1024, 0xFFFFFFFF).
- * 2. the remote ephemeral port (i.e. the auto-generated remote port for
- * a connect request initiated by the host's connect()) is generated by
- * hvs_remote_addr_init() and the range is [0x80000000, 0xFFFFFFFF).
- */
-
-#define MAX_LISTEN_PORT ((u32)0x7FFFFFFF)
-#define MAX_VM_LISTEN_PORT MAX_LISTEN_PORT
-#define MAX_HOST_LISTEN_PORT MAX_LISTEN_PORT
-#define MIN_HOST_EPHEMERAL_PORT (MAX_HOST_LISTEN_PORT + 1)
-
-/* 00000000-facb-11e6-bd58-64006a7986d3 */
-static const uuid_le srv_id_template =
- UUID_LE(0x00000000, 0xfacb, 0x11e6, 0xbd, 0x58,
- 0x64, 0x00, 0x6a, 0x79, 0x86, 0xd3);
-
-static inline bool is_valid_srv_id(const uuid_le *id)
-{
- return !memcmp(&id->b[4], &srv_id_template.b[4], sizeof(uuid_le) - 4);
-}
-
-static inline unsigned int get_port_by_srv_id(const uuid_le *svr_id)
-{
- return *((unsigned int *)svr_id);
-}
-
-static inline void hvs_addr_init(struct sockaddr_vm *addr,
- const uuid_le *svr_id)
-{
- unsigned int port = get_port_by_srv_id(svr_id);
-
- vsock_addr_init(addr, VMADDR_CID_ANY, port);
-}
-
-static inline void hvs_remote_addr_init(struct sockaddr_vm *remote,
- struct sockaddr_vm *local)
-{
- static u32 host_ephemeral_port = MIN_HOST_EPHEMERAL_PORT;
- struct sock *sk;
-
- vsock_addr_init(remote, VMADDR_CID_ANY, VMADDR_PORT_ANY);
-
- while (1) {
- /* Wrap around ? */
- if (host_ephemeral_port < MIN_HOST_EPHEMERAL_PORT ||
- host_ephemeral_port == VMADDR_PORT_ANY)
- host_ephemeral_port = MIN_HOST_EPHEMERAL_PORT;
-
- remote->svm_port = host_ephemeral_port++;
-
- sk = vsock_find_connected_socket(remote, local);
- if (!sk) {
- /* Found an available ephemeral port */
- return;
- }
-
- /* Release refcnt got in vsock_find_connected_socket */
- sock_put(sk);
- }
-}
-
-static bool hvs_channel_readable(struct vmbus_channel *chan)
-{
- u32 readable = hv_get_bytes_to_read(&chan->inbound);
-
- /* 0-size payload means FIN */
- return readable >= HVS_PKT_LEN(0);
-}
-
-static int hvs_channel_readable_payload(struct vmbus_channel *chan)
-{
- u32 readable = hv_get_bytes_to_read(&chan->inbound);
-
- if (readable > HVS_PKT_LEN(0)) {
- /* At least we have 1 byte to read. We don't need to return
- * the exact readable bytes: see vsock_stream_recvmsg() ->
- * vsock_stream_has_data().
- */
- return 1;
- }
-
- if (readable == HVS_PKT_LEN(0)) {
- /* 0-size payload means FIN */
- return 0;
- }
-
- /* No payload or FIN */
- return -1;
-}
-
-static inline size_t hvs_channel_writable_bytes(struct vmbus_channel *chan)
-{
- u32 writeable = hv_get_bytes_to_write(&chan->outbound);
- size_t ret;
-
- /* The ringbuffer mustn't be 100% full, and we should reserve a
- * zero-length-payload packet for the FIN: see hv_ringbuffer_write()
- * and hvs_shutdown().
- */
- if (writeable <= HVS_PKT_LEN(1) + HVS_PKT_LEN(0))
- return 0;
-
- ret = writeable - HVS_PKT_LEN(1) - HVS_PKT_LEN(0);
-
- return round_down(ret, 8);
-}
-
-static int hvs_send_data(struct vmbus_channel *chan,
- struct hvs_send_buf *send_buf, size_t to_write)
-{
- send_buf->hdr.pkt_type = 1;
- send_buf->hdr.data_size = to_write;
- return vmbus_sendpacket(chan, &send_buf->hdr,
- sizeof(send_buf->hdr) + to_write,
- 0, VM_PKT_DATA_INBAND, 0);
-}
-
-static void hvs_channel_cb(void *ctx)
-{
- struct sock *sk = (struct sock *)ctx;
- struct vsock_sock *vsk = vsock_sk(sk);
- struct hvsock *hvs = vsk->trans;
- struct vmbus_channel *chan = hvs->chan;
-
- if (hvs_channel_readable(chan))
- sk->sk_data_ready(sk);
-
- /* Mark it writable only if there is enough space */
- if (hvs_channel_writable_bytes(chan) >= HVS_SEND_BUF_SIZE)
- sk->sk_write_space(sk);
-}
-
-static void hvs_close_connection(struct vmbus_channel *chan)
-{
- struct sock *sk = get_per_channel_state(chan);
- struct vsock_sock *vsk = vsock_sk(sk);
-
- sk->sk_state = SS_UNCONNECTED;
- sock_set_flag(sk, SOCK_DONE);
- vsk->peer_shutdown |= SEND_SHUTDOWN | RCV_SHUTDOWN;
-
- sk->sk_state_change(sk);
-}
-
-static void hvs_open_connection(struct vmbus_channel *chan)
-{
- uuid_le *if_instance, *if_type;
- unsigned char conn_from_host;
-
- struct sockaddr_vm addr;
- struct sock *sk, *new = NULL;
- struct vsock_sock *vnew;
- struct hvsock *hvs, *hvs_new;
- int ret;
-
- if_type = &chan->offermsg.offer.if_type;
- if_instance = &chan->offermsg.offer.if_instance;
- conn_from_host = chan->offermsg.offer.u.pipe.user_def[0];
-
- /* The host or the VM should only listen on a port in
- * [0, MAX_LISTEN_PORT]
- */
- if (!is_valid_srv_id(if_type) ||
- get_port_by_srv_id(if_type) > MAX_LISTEN_PORT)
- return;
-
- hvs_addr_init(&addr, conn_from_host ? if_type : if_instance);
- sk = vsock_find_bound_socket(&addr);
- if (!sk)
- return;
-
- if ((conn_from_host && sk->sk_state != VSOCK_SS_LISTEN) ||
- (!conn_from_host && sk->sk_state != SS_CONNECTING))
- goto out;
-
- if (conn_from_host) {
- if (sk->sk_ack_backlog >= sk->sk_max_ack_backlog)
- goto out;
-
- new = __vsock_create(sock_net(sk), NULL, sk, GFP_KERNEL,
- sk->sk_type, 0);
- if (!new)
- goto out;
-
- new->sk_state = SS_CONNECTING;
- vnew = vsock_sk(new);
- hvs_new = vnew->trans;
- hvs_new->chan = chan;
- } else {
- hvs = vsock_sk(sk)->trans;
- hvs->chan = chan;
- }
-
- set_channel_read_mode(chan, HV_CALL_DIRECT);
- ret = vmbus_open(chan, RINGBUFFER_HVS_SND_SIZE,
- RINGBUFFER_HVS_RCV_SIZE, NULL, 0,
- hvs_channel_cb, conn_from_host ? new : sk);
- if (ret != 0) {
- if (conn_from_host) {
- hvs_new->chan = NULL;
- sock_put(new);
- } else {
- hvs->chan = NULL;
- }
- goto out;
- }
-
- set_per_channel_state(chan, conn_from_host ? new : sk);
- vmbus_set_chn_rescind_callback(chan, hvs_close_connection);
-
- /* See hvs_channel_cb() and hvs_notify_poll_out() */
- set_channel_pending_send_size(chan,
- HVS_PKT_LEN(HVS_SEND_BUF_SIZE) + 1);
-
- if (conn_from_host) {
- new->sk_state = SS_CONNECTED;
- sk->sk_ack_backlog++;
-
- hvs_addr_init(&vnew->local_addr, if_type);
- hvs_remote_addr_init(&vnew->remote_addr, &vnew->local_addr);
-
- hvs_new->vm_srv_id = *if_type;
- hvs_new->host_srv_id = *if_instance;
-
- vsock_insert_connected(vnew);
- vsock_enqueue_accept(sk, new);
- } else {
- sk->sk_state = SS_CONNECTED;
- sk->sk_socket->state = SS_CONNECTED;
-
- vsock_insert_connected(vsock_sk(sk));
- }
-
- sk->sk_state_change(sk);
-
-out:
- /* Release refcnt obtained when we called vsock_find_bound_socket() */
- sock_put(sk);
-}
-
-static u32 hvs_get_local_cid(void)
-{
- return VMADDR_CID_ANY;
-}
-
-static int hvs_sock_init(struct vsock_sock *vsk, struct vsock_sock *psk)
-{
- struct hvsock *hvs;
-
- hvs = kzalloc(sizeof(*hvs), GFP_KERNEL);
- if (!hvs)
- return -ENOMEM;
-
- vsk->trans = hvs;
- hvs->vsk = vsk;
-
- return 0;
-}
-
-static int hvs_connect(struct vsock_sock *vsk)
-{
- struct hvsock *h = vsk->trans;
-
- h->vm_srv_id = srv_id_template;
- h->host_srv_id = srv_id_template;
-
- *((u32 *)&h->vm_srv_id) = vsk->local_addr.svm_port;
- *((u32 *)&h->host_srv_id) = vsk->remote_addr.svm_port;
-
- return vmbus_send_tl_connect_request(&h->vm_srv_id, &h->host_srv_id);
-}
-
-static int hvs_shutdown(struct vsock_sock *vsk, int mode)
-{
- struct vmpipe_proto_header hdr;
- struct hvs_send_buf *send_buf;
- struct hvsock *hvs;
-
- if (!(mode & SEND_SHUTDOWN))
- return 0;
-
- hvs = vsk->trans;
-
- send_buf = (struct hvs_send_buf *)&hdr;
-
- /* It can't fail: see hvs_channel_writable_bytes(). */
- (void)hvs_send_data(hvs->chan, send_buf, 0);
-
- return 0;
-}
-
-static void hvs_release(struct vsock_sock *vsk)
-{
- struct hvsock *hvs = vsk->trans;
- struct vmbus_channel *chan = hvs->chan;
-
- if (chan)
- hvs_shutdown(vsk, RCV_SHUTDOWN | SEND_SHUTDOWN);
-
- vsock_remove_sock(vsk);
-}
-
-static void hvs_destruct(struct vsock_sock *vsk)
-{
- struct hvsock *hvs = vsk->trans;
- struct vmbus_channel *chan = hvs->chan;
-
- if (chan)
- vmbus_hvsock_device_unregister(chan);
-
- kfree(hvs);
-}
-
-static int hvs_dgram_bind(struct vsock_sock *vsk, struct sockaddr_vm *addr)
-{
- return -EOPNOTSUPP;
-}
-
-static int hvs_dgram_dequeue(struct vsock_sock *vsk, struct msghdr *msg,
- size_t len, int flags)
-{
- return -EOPNOTSUPP;
-}
-
-static int hvs_dgram_enqueue(struct vsock_sock *vsk,
- struct sockaddr_vm *remote, struct msghdr *msg,
- size_t dgram_len)
-{
- return -EOPNOTSUPP;
-}
-
-static bool hvs_dgram_allow(u32 cid, u32 port)
-{
- return false;
-}
-
-static ssize_t hvs_stream_dequeue(struct vsock_sock *vsk, struct msghdr *msg,
- size_t len, int flags)
-{
- struct hvsock *hvs = vsk->trans;
- bool need_refill = !hvs->recv_desc;
- struct hvs_recv_buf *recv_buf;
- u32 payload_len, to_read;
- int ret;
-
- if (flags & MSG_PEEK)
- return -EOPNOTSUPP;
-
- if (need_refill) {
- hvs->recv_desc = hv_pkt_iter_first(hvs->chan);
- recv_buf = (struct hvs_recv_buf *)(hvs->recv_desc + 1);
-
- payload_len = recv_buf->hdr.data_size;
- if (payload_len == 0 || payload_len > HVS_MTU_SIZE)
- return -EIO;
-
- hvs->recv_data_len = payload_len;
- hvs->recv_data_off = 0;
- } else {
- recv_buf = (struct hvs_recv_buf *)(hvs->recv_desc + 1);
- }
-
- to_read = min_t(u32, len, hvs->recv_data_len);
- ret = memcpy_to_msg(msg, recv_buf->data + hvs->recv_data_off, to_read);
- if (ret != 0)
- return ret;
-
- hvs->recv_data_len -= to_read;
-
- if (hvs->recv_data_len == 0)
- hvs->recv_desc = hv_pkt_iter_next(hvs->chan, hvs->recv_desc);
- else
- hvs->recv_data_off += to_read;
-
- return to_read;
-}
-
-static ssize_t hvs_stream_enqueue(struct vsock_sock *vsk, struct msghdr *msg,
- size_t len)
-{
- struct hvsock *hvs = vsk->trans;
- struct vmbus_channel *chan = hvs->chan;
- struct hvs_send_buf *send_buf;
- size_t to_write, max_writable, ret;
-
- BUILD_BUG_ON(sizeof(*send_buf) != PAGE_SIZE_4K);
-
- send_buf = kmalloc(sizeof(*send_buf), GFP_KERNEL);
- if (!send_buf)
- return -ENOMEM;
-
- max_writable = hvs_channel_writable_bytes(chan);
- to_write = min_t(size_t, len, max_writable);
- to_write = min_t(size_t, to_write, HVS_SEND_BUF_SIZE);
-
- ret = memcpy_from_msg(send_buf->data, msg, to_write);
- if (ret < 0)
- goto out;
-
- ret = hvs_send_data(hvs->chan, send_buf, to_write);
- if (ret < 0)
- goto out;
-
- ret = to_write;
-out:
- kfree(send_buf);
- return ret;
-}
-
-static s64 hvs_stream_has_data(struct vsock_sock *vsk)
-{
- struct hvsock *hvs = vsk->trans;
- s64 ret;
-
- switch (hvs_channel_readable_payload(hvs->chan)) {
- case 1:
- ret = 1;
- break;
- case 0:
- vsk->peer_shutdown |= SEND_SHUTDOWN;
- ret = 0;
- break;
- default: /* -1 */
- ret = 0;
- break;
- }
-
- return ret;
-}
-
-static s64 hvs_stream_has_space(struct vsock_sock *vsk)
-{
- struct hvsock *hvs = vsk->trans;
-
- return hvs_channel_writable_bytes(hvs->chan);
-}
-
-static u64 hvs_stream_rcvhiwat(struct vsock_sock *vsk)
-{
- return HVS_MTU_SIZE + 1;
-}
-
-static bool hvs_stream_is_active(struct vsock_sock *vsk)
-{
- struct hvsock *hvs = vsk->trans;
-
- return hvs->chan != NULL;
-}
-
-static bool hvs_stream_allow(u32 cid, u32 port)
-{
- static const u32 valid_cids[] = {
- VMADDR_CID_ANY,
- VMADDR_CID_HOST,
- };
- int i;
-
- /* The host's port range [MIN_HOST_EPHEMERAL_PORT, 0xFFFFFFFF) is
- * reserved as ephemeral ports, which are used as the host's ports
- * when the host initiates connections.
- */
- if (port > MAX_HOST_LISTEN_PORT)
- return false;
-
- for (i = 0; i < ARRAY_SIZE(valid_cids); i++) {
- if (cid == valid_cids[i])
- return true;
- }
-
- return false;
-}
-
-static
-int hvs_notify_poll_in(struct vsock_sock *vsk, size_t target, bool *readable)
-{
- struct hvsock *hvs = vsk->trans;
-
- *readable = hvs_channel_readable(hvs->chan);
- return 0;
-}
-
-static
-int hvs_notify_poll_out(struct vsock_sock *vsk, size_t target, bool *writable)
-{
- /* Report writable only if there is enough space */
- *writable = hvs_stream_has_space(vsk) >= HVS_SEND_BUF_SIZE;
-
- return 0;
-}
-
-static
-int hvs_notify_recv_init(struct vsock_sock *vsk, size_t target,
- struct vsock_transport_recv_notify_data *d)
-{
- return 0;
-}
-
-static
-int hvs_notify_recv_pre_block(struct vsock_sock *vsk, size_t target,
- struct vsock_transport_recv_notify_data *d)
-{
- return 0;
-}
-
-static
-int hvs_notify_recv_pre_dequeue(struct vsock_sock *vsk, size_t target,
- struct vsock_transport_recv_notify_data *d)
-{
- return 0;
-}
-
-static
-int hvs_notify_recv_post_dequeue(struct vsock_sock *vsk, size_t target,
- ssize_t copied, bool data_read,
- struct vsock_transport_recv_notify_data *d)
-{
- return 0;
-}
-
-static
-int hvs_notify_send_init(struct vsock_sock *vsk,
- struct vsock_transport_send_notify_data *d)
-{
- return 0;
-}
-
-static
-int hvs_notify_send_pre_block(struct vsock_sock *vsk,
- struct vsock_transport_send_notify_data *d)
-{
- return 0;
-}
-
-static
-int hvs_notify_send_pre_enqueue(struct vsock_sock *vsk,
- struct vsock_transport_send_notify_data *d)
-{
- return 0;
-}
-
-static
-int hvs_notify_send_post_enqueue(struct vsock_sock *vsk, ssize_t written,
- struct vsock_transport_send_notify_data *d)
-{
- return 0;
-}
-
-static void hvs_set_buffer_size(struct vsock_sock *vsk, u64 val)
-{
- /* Ignored. */
-}
-
-static void hvs_set_min_buffer_size(struct vsock_sock *vsk, u64 val)
-{
- /* Ignored. */
-}
-
-static void hvs_set_max_buffer_size(struct vsock_sock *vsk, u64 val)
-{
- /* Ignored. */
-}
-
-static u64 hvs_get_buffer_size(struct vsock_sock *vsk)
-{
- return -ENOPROTOOPT;
-}
-
-static u64 hvs_get_min_buffer_size(struct vsock_sock *vsk)
-{
- return -ENOPROTOOPT;
-}
-
-static u64 hvs_get_max_buffer_size(struct vsock_sock *vsk)
-{
- return -ENOPROTOOPT;
-}
-
-static struct vsock_transport hvs_transport = {
- .get_local_cid = hvs_get_local_cid,
-
- .init = hvs_sock_init,
- .destruct = hvs_destruct,
- .release = hvs_release,
- .connect = hvs_connect,
- .shutdown = hvs_shutdown,
-
- .dgram_bind = hvs_dgram_bind,
- .dgram_dequeue = hvs_dgram_dequeue,
- .dgram_enqueue = hvs_dgram_enqueue,
- .dgram_allow = hvs_dgram_allow,
-
- .stream_dequeue = hvs_stream_dequeue,
- .stream_enqueue = hvs_stream_enqueue,
- .stream_has_data = hvs_stream_has_data,
- .stream_has_space = hvs_stream_has_space,
- .stream_rcvhiwat = hvs_stream_rcvhiwat,
- .stream_is_active = hvs_stream_is_active,
- .stream_allow = hvs_stream_allow,
-
- .notify_poll_in = hvs_notify_poll_in,
- .notify_poll_out = hvs_notify_poll_out,
- .notify_recv_init = hvs_notify_recv_init,
- .notify_recv_pre_block = hvs_notify_recv_pre_block,
- .notify_recv_pre_dequeue = hvs_notify_recv_pre_dequeue,
- .notify_recv_post_dequeue = hvs_notify_recv_post_dequeue,
- .notify_send_init = hvs_notify_send_init,
- .notify_send_pre_block = hvs_notify_send_pre_block,
- .notify_send_pre_enqueue = hvs_notify_send_pre_enqueue,
- .notify_send_post_enqueue = hvs_notify_send_post_enqueue,
-
- .set_buffer_size = hvs_set_buffer_size,
- .set_min_buffer_size = hvs_set_min_buffer_size,
- .set_max_buffer_size = hvs_set_max_buffer_size,
- .get_buffer_size = hvs_get_buffer_size,
- .get_min_buffer_size = hvs_get_min_buffer_size,
- .get_max_buffer_size = hvs_get_max_buffer_size,
-};
-
-static int hvs_probe(struct hv_device *hdev,
- const struct hv_vmbus_device_id *dev_id)
-{
- struct vmbus_channel *chan = hdev->channel;
-
- hvs_open_connection(chan);
-
- /* Always return success to suppress the unnecessary error message
- * in vmbus_probe(): on error the host will rescind the device in
- * 30 seconds and we can do cleanup at that time in
- * vmbus_onoffer_rescind().
- */
- return 0;
-}
-
-static int hvs_remove(struct hv_device *hdev)
-{
- struct vmbus_channel *chan = hdev->channel;
-
- vmbus_close(chan);
-
- return 0;
-}
-
-/* This isn't really used. See vmbus_match() and vmbus_probe() */
-static const struct hv_vmbus_device_id id_table[] = {
- {},
-};
-
-static struct hv_driver hvs_drv = {
- .name = "hv_sock",
- .hvsock = true,
- .id_table = id_table,
- .probe = hvs_probe,
- .remove = hvs_remove,
-};
-
-static int __init hvs_init(void)
-{
- int ret;
-
- if (vmbus_proto_version < VERSION_WIN10)
- return -ENODEV;
-
- ret = vmbus_driver_register(&hvs_drv);
- if (ret != 0)
- return ret;
-
- ret = vsock_core_init(&hvs_transport);
- if (ret) {
- vmbus_driver_unregister(&hvs_drv);
- return ret;
- }
-
- return 0;
-}
-
-static void __exit hvs_exit(void)
-{
- vsock_core_exit();
- vmbus_driver_unregister(&hvs_drv);
-}
-
-module_init(hvs_init);
-module_exit(hvs_exit);
-
-MODULE_DESCRIPTION("Hyper-V sockets");
-MODULE_VERSION("1.0.0");
-MODULE_LICENSE("GPL");
--
2.7.4
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