1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/*
* Vhost User library
*
* Copyright (c) 2016 Nutanix Inc. All rights reserved.
* Copyright (c) 2017 Red Hat, Inc.
*
* Authors:
* Marc-André Lureau <mlureau@redhat.com>
* Felipe Franciosi <felipe@nutanix.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* later. See the COPYING file in the top-level directory.
*/
#include "libvhost-user-glib.h"
#ifndef container_of
#define container_of(ptr, type, member) \
__extension__({ \
void *__mptr = (void *)(ptr); \
((type *)(__mptr - offsetof(type, member))); \
})
#endif
/* glib event loop integration for libvhost-user and misc callbacks */
G_STATIC_ASSERT((int)G_IO_IN == (int)VU_WATCH_IN);
G_STATIC_ASSERT((int)G_IO_OUT == (int)VU_WATCH_OUT);
G_STATIC_ASSERT((int)G_IO_PRI == (int)VU_WATCH_PRI);
G_STATIC_ASSERT((int)G_IO_ERR == (int)VU_WATCH_ERR);
G_STATIC_ASSERT((int)G_IO_HUP == (int)VU_WATCH_HUP);
typedef struct VugSrc {
GSource parent;
VuDev *dev;
GPollFD gfd;
} VugSrc;
static gboolean
vug_src_prepare(GSource *gsrc, gint *timeout)
{
g_assert(timeout);
*timeout = -1;
return FALSE;
}
static gboolean
vug_src_check(GSource *gsrc)
{
VugSrc *src = (VugSrc *)gsrc;
g_assert(src);
return src->gfd.revents & src->gfd.events;
}
static gboolean
vug_src_dispatch(GSource *gsrc, GSourceFunc cb, gpointer data)
{
VugSrc *src = (VugSrc *)gsrc;
g_assert(src);
((vu_watch_cb)cb)(src->dev, src->gfd.revents, data);
return G_SOURCE_CONTINUE;
}
static GSourceFuncs vug_src_funcs = {
vug_src_prepare,
vug_src_check,
vug_src_dispatch,
NULL
};
GSource *
vug_source_new(VugDev *gdev, int fd, GIOCondition cond,
vu_watch_cb vu_cb, gpointer data)
{
VuDev *dev = &gdev->parent;
GSource *gsrc;
VugSrc *src;
guint id;
g_assert(gdev);
g_assert(fd >= 0);
g_assert(vu_cb);
gsrc = g_source_new(&vug_src_funcs, sizeof(VugSrc));
g_source_set_callback(gsrc, (GSourceFunc)vu_cb, data, NULL);
src = (VugSrc *)gsrc;
src->dev = dev;
src->gfd.fd = fd;
src->gfd.events = cond;
g_source_add_poll(gsrc, &src->gfd);
id = g_source_attach(gsrc, g_main_context_get_thread_default());
g_assert(id);
return gsrc;
}
static void
set_watch(VuDev *vu_dev, int fd, int vu_evt, vu_watch_cb cb, void *pvt)
{
GSource *src;
VugDev *dev;
g_assert(vu_dev);
g_assert(fd >= 0);
g_assert(cb);
dev = container_of(vu_dev, VugDev, parent);
src = vug_source_new(dev, fd, vu_evt, cb, pvt);
g_hash_table_replace(dev->fdmap, GINT_TO_POINTER(fd), src);
}
static void
remove_watch(VuDev *vu_dev, int fd)
{
VugDev *dev;
g_assert(vu_dev);
g_assert(fd >= 0);
dev = container_of(vu_dev, VugDev, parent);
g_hash_table_remove(dev->fdmap, GINT_TO_POINTER(fd));
}
static void vug_watch(VuDev *dev, int condition, void *data)
{
if (!vu_dispatch(dev) != 0) {
dev->panic(dev, "Error processing vhost message");
}
}
void vug_source_destroy(GSource *src)
{
if (!src) {
return;
}
g_source_destroy(src);
g_source_unref(src);
}
bool
vug_init(VugDev *dev, uint16_t max_queues, int socket,
vu_panic_cb panic, const VuDevIface *iface)
{
g_assert(dev);
g_assert(iface);
if (!vu_init(&dev->parent, max_queues, socket, panic, NULL, set_watch,
remove_watch, iface)) {
return false;
}
dev->fdmap = g_hash_table_new_full(NULL, NULL, NULL,
(GDestroyNotify) vug_source_destroy);
dev->src = vug_source_new(dev, socket, G_IO_IN, vug_watch, NULL);
return true;
}
void
vug_deinit(VugDev *dev)
{
g_assert(dev);
g_hash_table_unref(dev->fdmap);
vug_source_destroy(dev->src);
}
|
