osdep: include glib-compat.h before other QEMU headers
[qemu/ar7.git] / include / qemu / vhost-user-server.h
blob121ea1dedf3ab6b509c048529c8c1308d403d202
1 /*
2 * Sharing QEMU devices via vhost-user protocol
4 * Copyright (c) Coiby Xu <coiby.xu@gmail.com>.
5 * Copyright (c) 2020 Red Hat, Inc.
7 * This work is licensed under the terms of the GNU GPL, version 2 or
8 * later. See the COPYING file in the top-level directory.
9 */
11 #ifndef VHOST_USER_SERVER_H
12 #define VHOST_USER_SERVER_H
14 #include "subprojects/libvhost-user/libvhost-user.h" /* only for the type definitions */
15 #include "io/channel-socket.h"
16 #include "io/channel-file.h"
17 #include "io/net-listener.h"
18 #include "qemu/error-report.h"
19 #include "qapi/error.h"
20 #include "standard-headers/linux/virtio_blk.h"
22 /* A kick fd that we monitor on behalf of libvhost-user */
23 typedef struct VuFdWatch {
24 VuDev *vu_dev;
25 int fd; /*kick fd*/
26 void *pvt;
27 vu_watch_cb cb;
28 QTAILQ_ENTRY(VuFdWatch) next;
29 } VuFdWatch;
31 /**
32 * VuServer:
33 * A vhost-user server instance with user-defined VuDevIface callbacks.
34 * Vhost-user device backends can be implemented using VuServer. VuDevIface
35 * callbacks and virtqueue kicks run in the given AioContext.
37 typedef struct {
38 QIONetListener *listener;
39 QEMUBH *restart_listener_bh;
40 AioContext *ctx;
41 int max_queues;
42 const VuDevIface *vu_iface;
44 /* Protected by ctx lock */
45 VuDev vu_dev;
46 QIOChannel *ioc; /* The I/O channel with the client */
47 QIOChannelSocket *sioc; /* The underlying data channel with the client */
48 QTAILQ_HEAD(, VuFdWatch) vu_fd_watches;
50 Coroutine *co_trip; /* coroutine for processing VhostUserMsg */
51 } VuServer;
53 bool vhost_user_server_start(VuServer *server,
54 SocketAddress *unix_socket,
55 AioContext *ctx,
56 uint16_t max_queues,
57 const VuDevIface *vu_iface,
58 Error **errp);
60 void vhost_user_server_stop(VuServer *server);
62 void vhost_user_server_attach_aio_context(VuServer *server, AioContext *ctx);
63 void vhost_user_server_detach_aio_context(VuServer *server);
65 #endif /* VHOST_USER_SERVER_H */