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
177
178
179
180
181
182
|
/*
* Copyright (c) 2018 Citrix Systems Inc.
*
* 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 "qemu/osdep.h"
#include "hw/xen/xen.h"
#include "hw/xen/xen-bus.h"
#include "hw/xen/xen-bus-helper.h"
#include "qapi/error.h"
#include <glib/gprintf.h>
struct xs_state {
enum xenbus_state statenum;
const char *statestr;
};
#define XS_STATE(state) { state, #state }
static struct xs_state xs_state[] = {
XS_STATE(XenbusStateUnknown),
XS_STATE(XenbusStateInitialising),
XS_STATE(XenbusStateInitWait),
XS_STATE(XenbusStateInitialised),
XS_STATE(XenbusStateConnected),
XS_STATE(XenbusStateClosing),
XS_STATE(XenbusStateClosed),
XS_STATE(XenbusStateReconfiguring),
XS_STATE(XenbusStateReconfigured),
};
#undef XS_STATE
const char *xs_strstate(enum xenbus_state state)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(xs_state); i++) {
if (xs_state[i].statenum == state) {
return xs_state[i].statestr;
}
}
return "INVALID";
}
void xs_node_create(struct xs_handle *xsh, xs_transaction_t tid,
const char *node, struct xs_permissions perms[],
unsigned int nr_perms, Error **errp)
{
trace_xs_node_create(node);
if (!xs_write(xsh, tid, node, "", 0)) {
error_setg_errno(errp, errno, "failed to create node '%s'", node);
return;
}
if (!xs_set_permissions(xsh, tid, node, perms, nr_perms)) {
error_setg_errno(errp, errno, "failed to set node '%s' permissions",
node);
}
}
void xs_node_destroy(struct xs_handle *xsh, xs_transaction_t tid,
const char *node, Error **errp)
{
trace_xs_node_destroy(node);
if (!xs_rm(xsh, tid, node)) {
error_setg_errno(errp, errno, "failed to destroy node '%s'", node);
}
}
void xs_node_vprintf(struct xs_handle *xsh, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, va_list ap)
{
char *path, *value;
int len;
path = (strlen(node) != 0) ? g_strdup_printf("%s/%s", node, key) :
g_strdup(key);
len = g_vasprintf(&value, fmt, ap);
trace_xs_node_vprintf(path, value);
if (!xs_write(xsh, tid, path, value, len)) {
error_setg_errno(errp, errno, "failed to write '%s' to '%s'",
value, path);
}
g_free(value);
g_free(path);
}
void xs_node_printf(struct xs_handle *xsh, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
xs_node_vprintf(xsh, tid, node, key, errp, fmt, ap);
va_end(ap);
}
int xs_node_vscanf(struct xs_handle *xsh, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, va_list ap)
{
char *path, *value;
int rc;
path = (strlen(node) != 0) ? g_strdup_printf("%s/%s", node, key) :
g_strdup(key);
value = xs_read(xsh, tid, path, NULL);
trace_xs_node_vscanf(path, value);
if (value) {
rc = vsscanf(value, fmt, ap);
} else {
error_setg_errno(errp, errno, "failed to read from '%s'",
path);
rc = EOF;
}
free(value);
g_free(path);
return rc;
}
int xs_node_scanf(struct xs_handle *xsh, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, ...)
{
va_list ap;
int rc;
va_start(ap, fmt);
rc = xs_node_vscanf(xsh, tid, node, key, errp, fmt, ap);
va_end(ap);
return rc;
}
void xs_node_watch(struct xs_handle *xsh, const char *node, const char *key,
char *token, Error **errp)
{
char *path;
path = (strlen(node) != 0) ? g_strdup_printf("%s/%s", node, key) :
g_strdup(key);
trace_xs_node_watch(path);
if (!xs_watch(xsh, path, token)) {
error_setg_errno(errp, errno, "failed to watch node '%s'", path);
}
g_free(path);
}
void xs_node_unwatch(struct xs_handle *xsh, const char *node,
const char *key, const char *token, Error **errp)
{
char *path;
path = (strlen(node) != 0) ? g_strdup_printf("%s/%s", node, key) :
g_strdup(key);
trace_xs_node_unwatch(path);
if (!xs_unwatch(xsh, path, token)) {
error_setg_errno(errp, errno, "failed to unwatch node '%s'", path);
}
g_free(path);
}
|
