4 * Copyright (c) 2016 Nutanix Inc. All rights reserved.
5 * Copyright (c) 2017 Red Hat, Inc.
8 * Marc-André Lureau <mlureau@redhat.com>
9 * Felipe Franciosi <felipe@nutanix.com>
11 * This work is licensed under the terms of the GNU GPL, version 2 or
12 * later. See the COPYING file in the top-level directory.
15 #include "qemu/osdep.h"
17 #include "libvhost-user-glib.h"
19 /* glib event loop integration for libvhost-user and misc callbacks */
21 G_STATIC_ASSERT((int)G_IO_IN == (int)VU_WATCH_IN);
22 G_STATIC_ASSERT((int)G_IO_OUT == (int)VU_WATCH_OUT);
23 G_STATIC_ASSERT((int)G_IO_PRI == (int)VU_WATCH_PRI);
24 G_STATIC_ASSERT((int)G_IO_ERR == (int)VU_WATCH_ERR);
25 G_STATIC_ASSERT((int)G_IO_HUP == (int)VU_WATCH_HUP);
27 typedef struct VugSrc {
34 vug_src_prepare(GSource *gsrc, gint *timeout)
43 vug_src_check(GSource *gsrc)
45 VugSrc *src = (VugSrc *)gsrc;
49 return src->gfd.revents & src->gfd.events;
53 vug_src_dispatch(GSource *gsrc, GSourceFunc cb, gpointer data)
55 VugSrc *src = (VugSrc *)gsrc;
59 ((vu_watch_cb)cb)(src->dev, src->gfd.revents, data);
61 return G_SOURCE_CONTINUE;
64 static GSourceFuncs vug_src_funcs = {
72 vug_source_new(VugDev *gdev, int fd, GIOCondition cond,
73 vu_watch_cb vu_cb, gpointer data)
75 VuDev *dev = &gdev->parent;
84 gsrc = g_source_new(&vug_src_funcs, sizeof(VugSrc));
85 g_source_set_callback(gsrc, (GSourceFunc)vu_cb, data, NULL);
89 src->gfd.events = cond;
91 g_source_add_poll(gsrc, &src->gfd);
92 id = g_source_attach(gsrc, g_main_context_get_thread_default());
99 set_watch(VuDev *vu_dev, int fd, int vu_evt, vu_watch_cb cb, void *pvt)
108 dev = container_of(vu_dev, VugDev, parent);
109 src = vug_source_new(dev, fd, vu_evt, cb, pvt);
110 g_hash_table_replace(dev->fdmap, GINT_TO_POINTER(fd), src);
114 remove_watch(VuDev *vu_dev, int fd)
121 dev = container_of(vu_dev, VugDev, parent);
122 g_hash_table_remove(dev->fdmap, GINT_TO_POINTER(fd));
126 static void vug_watch(VuDev *dev, int condition, void *data)
128 if (!vu_dispatch(dev) != 0) {
129 dev->panic(dev, "Error processing vhost message");
133 void vug_source_destroy(GSource *src)
139 g_source_destroy(src);
144 vug_init(VugDev *dev, uint16_t max_queues, int socket,
145 vu_panic_cb panic, const VuDevIface *iface)
150 if (!vu_init(&dev->parent, max_queues, socket, panic, NULL, set_watch,
151 remove_watch, iface)) {
155 dev->fdmap = g_hash_table_new_full(NULL, NULL, NULL,
156 (GDestroyNotify) vug_source_destroy);
158 dev->src = vug_source_new(dev, socket, G_IO_IN, vug_watch, NULL);
164 vug_deinit(VugDev *dev)
168 g_hash_table_unref(dev->fdmap);
169 vug_source_destroy(dev->src);