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
|
/*
* Copyright (C) 2014 Citrix Systems UK Ltd.
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
* Contributions after 2012-01-13 are licensed under the terms of the
* GNU GPL, version 2 or (at your option) any later version.
*/
#include "qemu/osdep.h"
#include "hw/xen/xen_backend.h"
#include "qmp-commands.h"
#include "sysemu/char.h"
#include "sysemu/accel.h"
#include "migration/migration.h"
//#define DEBUG_XEN
#ifdef DEBUG_XEN
#define DPRINTF(fmt, ...) \
do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) \
do { } while (0)
#endif
static int store_dev_info(int domid, CharDriverState *cs, const char *string)
{
struct xs_handle *xs = NULL;
char *path = NULL;
char *newpath = NULL;
char *pts = NULL;
int ret = -1;
/* Only continue if we're talking to a pty. */
if (strncmp(cs->filename, "pty:", 4)) {
return 0;
}
pts = cs->filename + 4;
/* We now have everything we need to set the xenstore entry. */
xs = xs_open(0);
if (xs == NULL) {
fprintf(stderr, "Could not contact XenStore\n");
goto out;
}
path = xs_get_domain_path(xs, domid);
if (path == NULL) {
fprintf(stderr, "xs_get_domain_path() error\n");
goto out;
}
newpath = realloc(path, (strlen(path) + strlen(string) +
strlen("/tty") + 1));
if (newpath == NULL) {
fprintf(stderr, "realloc error\n");
goto out;
}
path = newpath;
strcat(path, string);
strcat(path, "/tty");
if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) {
fprintf(stderr, "xs_write for '%s' fail", string);
goto out;
}
ret = 0;
out:
free(path);
xs_close(xs);
return ret;
}
void xenstore_store_pv_console_info(int i, CharDriverState *chr)
{
if (i == 0) {
store_dev_info(xen_domid, chr, "/console");
} else {
char buf[32];
snprintf(buf, sizeof(buf), "/device/console/%d", i);
store_dev_info(xen_domid, chr, buf);
}
}
static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
{
char path[50];
if (xs == NULL) {
fprintf(stderr, "xenstore connection not initialized\n");
exit(1);
}
snprintf(path, sizeof (path), "device-model/%u/state", xen_domid);
if (!xs_write(xs, XBT_NULL, path, state, strlen(state))) {
fprintf(stderr, "error recording dm state\n");
exit(1);
}
}
static void xen_change_state_handler(void *opaque, int running,
RunState state)
{
if (running) {
/* record state running */
xenstore_record_dm_state(xenstore, "running");
}
}
static int xen_init(MachineState *ms)
{
xen_xc = xc_interface_open(0, 0, 0);
if (xen_xc == NULL) {
xen_be_printf(NULL, 0, "can't open xen interface\n");
return -1;
}
xen_fmem = xenforeignmemory_open(0, 0);
if (xen_fmem == NULL) {
xen_be_printf(NULL, 0, "can't open xen fmem interface\n");
xc_interface_close(xen_xc);
return -1;
}
qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
global_state_set_optional();
savevm_skip_configuration();
savevm_skip_section_footers();
return 0;
}
static void xen_accel_class_init(ObjectClass *oc, void *data)
{
AccelClass *ac = ACCEL_CLASS(oc);
ac->name = "Xen";
ac->init_machine = xen_init;
ac->allowed = &xen_allowed;
}
#define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
static const TypeInfo xen_accel_type = {
.name = TYPE_XEN_ACCEL,
.parent = TYPE_ACCEL,
.class_init = xen_accel_class_init,
};
static void xen_type_init(void)
{
type_register_static(&xen_accel_type);
}
type_init(xen_type_init);
|
