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11#include "qemu/osdep.h"
12#include "hw/xen/xen_backend.h"
13#include "qmp-commands.h"
14#include "chardev/char.h"
15#include "sysemu/accel.h"
16#include "migration/misc.h"
17#include "migration/global_state.h"
18
19
20
21#ifdef DEBUG_XEN
22#define DPRINTF(fmt, ...) \
23 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
24#else
25#define DPRINTF(fmt, ...) \
26 do { } while (0)
27#endif
28
29xc_interface *xen_xc;
30xenforeignmemory_handle *xen_fmem;
31xendevicemodel_handle *xen_dmod;
32
33static int store_dev_info(int domid, Chardev *cs, const char *string)
34{
35 struct xs_handle *xs = NULL;
36 char *path = NULL;
37 char *newpath = NULL;
38 char *pts = NULL;
39 int ret = -1;
40
41
42 if (!CHARDEV_IS_PTY(cs)) {
43 return 0;
44 }
45 pts = cs->filename + 4;
46
47
48 xs = xs_open(0);
49 if (xs == NULL) {
50 fprintf(stderr, "Could not contact XenStore\n");
51 goto out;
52 }
53
54 path = xs_get_domain_path(xs, domid);
55 if (path == NULL) {
56 fprintf(stderr, "xs_get_domain_path() error\n");
57 goto out;
58 }
59 newpath = realloc(path, (strlen(path) + strlen(string) +
60 strlen("/tty") + 1));
61 if (newpath == NULL) {
62 fprintf(stderr, "realloc error\n");
63 goto out;
64 }
65 path = newpath;
66
67 strcat(path, string);
68 strcat(path, "/tty");
69 if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) {
70 fprintf(stderr, "xs_write for '%s' fail", string);
71 goto out;
72 }
73 ret = 0;
74
75out:
76 free(path);
77 xs_close(xs);
78
79 return ret;
80}
81
82void xenstore_store_pv_console_info(int i, Chardev *chr)
83{
84 if (i == 0) {
85 store_dev_info(xen_domid, chr, "/console");
86 } else {
87 char buf[32];
88 snprintf(buf, sizeof(buf), "/device/console/%d", i);
89 store_dev_info(xen_domid, chr, buf);
90 }
91}
92
93
94static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
95{
96 char path[50];
97
98 if (xs == NULL) {
99 fprintf(stderr, "xenstore connection not initialized\n");
100 exit(1);
101 }
102
103 snprintf(path, sizeof (path), "device-model/%u/state", xen_domid);
104 if (!xs_write(xs, XBT_NULL, path, state, strlen(state))) {
105 fprintf(stderr, "error recording dm state\n");
106 exit(1);
107 }
108}
109
110
111static void xen_change_state_handler(void *opaque, int running,
112 RunState state)
113{
114 if (running) {
115
116 xenstore_record_dm_state(xenstore, "running");
117 }
118}
119
120static int xen_init(MachineState *ms)
121{
122 xen_xc = xc_interface_open(0, 0, 0);
123 if (xen_xc == NULL) {
124 xen_pv_printf(NULL, 0, "can't open xen interface\n");
125 return -1;
126 }
127 xen_fmem = xenforeignmemory_open(0, 0);
128 if (xen_fmem == NULL) {
129 xen_pv_printf(NULL, 0, "can't open xen fmem interface\n");
130 xc_interface_close(xen_xc);
131 return -1;
132 }
133 xen_dmod = xendevicemodel_open(0, 0);
134 if (xen_dmod == NULL) {
135 xen_pv_printf(NULL, 0, "can't open xen devicemodel interface\n");
136 xenforeignmemory_close(xen_fmem);
137 xc_interface_close(xen_xc);
138 return -1;
139 }
140 qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
141 return 0;
142}
143
144static GlobalProperty xen_compat_props[] = {
145 {
146 .driver = "migration",
147 .property = "store-global-state",
148 .value = "off",
149 },
150 {
151 .driver = "migration",
152 .property = "send-configuration",
153 .value = "off",
154 },
155 {
156 .driver = "migration",
157 .property = "send-section-footer",
158 .value = "off",
159 },
160 { },
161};
162
163static void xen_accel_class_init(ObjectClass *oc, void *data)
164{
165 AccelClass *ac = ACCEL_CLASS(oc);
166 ac->name = "Xen";
167 ac->init_machine = xen_init;
168 ac->allowed = &xen_allowed;
169 ac->global_props = xen_compat_props;
170}
171
172#define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
173
174static const TypeInfo xen_accel_type = {
175 .name = TYPE_XEN_ACCEL,
176 .parent = TYPE_ACCEL,
177 .class_init = xen_accel_class_init,
178};
179
180static void xen_type_init(void)
181{
182 type_register_static(&xen_accel_type);
183}
184
185type_init(xen_type_init);
186