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 "libvhost-user-glib.h"
18 #define container_of(ptr, type, member) \
20 void *__mptr = (void *)(ptr); \
21 ((type *)(__mptr - offsetof(type, member))); \
25 /* glib event loop integration for libvhost-user and misc callbacks */
27 G_STATIC_ASSERT((int)G_IO_IN == (int)VU_WATCH_IN);
28 G_STATIC_ASSERT((int)G_IO_OUT == (int)VU_WATCH_OUT);
29 G_STATIC_ASSERT((int)G_IO_PRI == (int)VU_WATCH_PRI);
30 G_STATIC_ASSERT((int)G_IO_ERR == (int)VU_WATCH_ERR);
31 G_STATIC_ASSERT((int)G_IO_HUP == (int)VU_WATCH_HUP);
33 typedef struct VugSrc {
40 vug_src_prepare(GSource *gsrc, gint *timeout)
49 vug_src_check(GSource *gsrc)
51 VugSrc *src = (VugSrc *)gsrc;
55 return src->gfd.revents & src->gfd.events;
59 vug_src_dispatch(GSource *gsrc, GSourceFunc cb, gpointer data)
61 VugSrc *src = (VugSrc *)gsrc;
65 ((vu_watch_cb)cb)(src->dev, src->gfd.revents, data);
67 return G_SOURCE_CONTINUE;
70 static GSourceFuncs vug_src_funcs = {
78 vug_source_new(VugDev *gdev, int fd, GIOCondition cond,
79 vu_watch_cb vu_cb, gpointer data)
81 VuDev *dev = &gdev->parent;
90 gsrc = g_source_new(&vug_src_funcs, sizeof(VugSrc));
91 g_source_set_callback(gsrc, (GSourceFunc)vu_cb, data, NULL);
95 src->gfd.events = cond;
97 g_source_add_poll(gsrc, &src->gfd);
98 id = g_source_attach(gsrc, g_main_context_get_thread_default());
105 set_watch(VuDev *vu_dev, int fd, int vu_evt, vu_watch_cb cb, void *pvt)
114 dev = container_of(vu_dev, VugDev, parent);
115 src = vug_source_new(dev, fd, vu_evt, cb, pvt);
116 g_hash_table_replace(dev->fdmap, GINT_TO_POINTER(fd), src);
120 remove_watch(VuDev *vu_dev, int fd)
127 dev = container_of(vu_dev, VugDev, parent);
128 g_hash_table_remove(dev->fdmap, GINT_TO_POINTER(fd));
132 static void vug_watch(VuDev *dev, int condition, void *data)
134 if (!vu_dispatch(dev) != 0) {
135 dev->panic(dev, "Error processing vhost message");
139 void vug_source_destroy(GSource *src)
145 g_source_destroy(src);
150 vug_init(VugDev *dev, uint16_t max_queues, int socket,
151 vu_panic_cb panic, const VuDevIface *iface)
156 if (!vu_init(&dev->parent, max_queues, socket, panic, NULL, set_watch,
157 remove_watch, iface)) {
161 dev->fdmap = g_hash_table_new_full(NULL, NULL, NULL,
162 (GDestroyNotify) vug_source_destroy);
164 dev->src = vug_source_new(dev, socket, G_IO_IN, vug_watch, NULL);
170 vug_deinit(VugDev *dev)
174 g_hash_table_unref(dev->fdmap);
175 vug_source_destroy(dev->src);