tests: virtio-9p: add version operation test
[qemu.git] / xen-common.c
1 /*
2 * Copyright (C) 2014 Citrix Systems UK Ltd.
3 *
4 * This work is licensed under the terms of the GNU GPL, version 2. See
5 * the COPYING file in the top-level directory.
6 *
7 * Contributions after 2012-01-13 are licensed under the terms of the
8 * GNU GPL, version 2 or (at your option) any later version.
9 */
10
11 #include "qemu/osdep.h"
12 #include "hw/xen/xen_backend.h"
13 #include "qmp-commands.h"
14 #include "sysemu/char.h"
15 #include "sysemu/accel.h"
16 #include "migration/migration.h"
17
18 //#define DEBUG_XEN
19
20 #ifdef DEBUG_XEN
21 #define DPRINTF(fmt, ...) \
22 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
23 #else
24 #define DPRINTF(fmt, ...) \
25 do { } while (0)
26 #endif
27
28 static int store_dev_info(int domid, CharDriverState *cs, const char *string)
29 {
30 struct xs_handle *xs = NULL;
31 char *path = NULL;
32 char *newpath = NULL;
33 char *pts = NULL;
34 int ret = -1;
35
36 /* Only continue if we're talking to a pty. */
37 if (strncmp(cs->filename, "pty:", 4)) {
38 return 0;
39 }
40 pts = cs->filename + 4;
41
42 /* We now have everything we need to set the xenstore entry. */
43 xs = xs_open(0);
44 if (xs == NULL) {
45 fprintf(stderr, "Could not contact XenStore\n");
46 goto out;
47 }
48
49 path = xs_get_domain_path(xs, domid);
50 if (path == NULL) {
51 fprintf(stderr, "xs_get_domain_path() error\n");
52 goto out;
53 }
54 newpath = realloc(path, (strlen(path) + strlen(string) +
55 strlen("/tty") + 1));
56 if (newpath == NULL) {
57 fprintf(stderr, "realloc error\n");
58 goto out;
59 }
60 path = newpath;
61
62 strcat(path, string);
63 strcat(path, "/tty");
64 if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) {
65 fprintf(stderr, "xs_write for '%s' fail", string);
66 goto out;
67 }
68 ret = 0;
69
70 out:
71 free(path);
72 xs_close(xs);
73
74 return ret;
75 }
76
77 void xenstore_store_pv_console_info(int i, CharDriverState *chr)
78 {
79 if (i == 0) {
80 store_dev_info(xen_domid, chr, "/console");
81 } else {
82 char buf[32];
83 snprintf(buf, sizeof(buf), "/device/console/%d", i);
84 store_dev_info(xen_domid, chr, buf);
85 }
86 }
87
88
89 static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
90 {
91 char path[50];
92
93 if (xs == NULL) {
94 fprintf(stderr, "xenstore connection not initialized\n");
95 exit(1);
96 }
97
98 snprintf(path, sizeof (path), "device-model/%u/state", xen_domid);
99 if (!xs_write(xs, XBT_NULL, path, state, strlen(state))) {
100 fprintf(stderr, "error recording dm state\n");
101 exit(1);
102 }
103 }
104
105
106 static void xen_change_state_handler(void *opaque, int running,
107 RunState state)
108 {
109 if (running) {
110 /* record state running */
111 xenstore_record_dm_state(xenstore, "running");
112 }
113 }
114
115 static int xen_init(MachineState *ms)
116 {
117 xen_xc = xc_interface_open(0, 0, 0);
118 if (xen_xc == NULL) {
119 xen_pv_printf(NULL, 0, "can't open xen interface\n");
120 return -1;
121 }
122 xen_fmem = xenforeignmemory_open(0, 0);
123 if (xen_fmem == NULL) {
124 xen_pv_printf(NULL, 0, "can't open xen fmem interface\n");
125 xc_interface_close(xen_xc);
126 return -1;
127 }
128 qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
129
130 global_state_set_optional();
131 savevm_skip_configuration();
132 savevm_skip_section_footers();
133
134 return 0;
135 }
136
137 static void xen_accel_class_init(ObjectClass *oc, void *data)
138 {
139 AccelClass *ac = ACCEL_CLASS(oc);
140 ac->name = "Xen";
141 ac->init_machine = xen_init;
142 ac->allowed = &xen_allowed;
143 }
144
145 #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
146
147 static const TypeInfo xen_accel_type = {
148 .name = TYPE_XEN_ACCEL,
149 .parent = TYPE_ACCEL,
150 .class_init = xen_accel_class_init,
151 };
152
153 static void xen_type_init(void)
154 {
155 type_register_static(&xen_accel_type);
156 }
157
158 type_init(xen_type_init);