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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
/*
* Copyright (C) 2008 Tobias Brunner
* Copyright (C) 2007 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#ifndef GUEST_H
#define GUEST_H
#include <library.h>
#include <utils/enumerator.h>
typedef enum guest_state_t guest_state_t;
typedef struct guest_t guest_t;
#include "iface.h"
/**
* State of a guest (started, stopped, ...)
*/
enum guest_state_t {
/** guest kernel not running at all */
GUEST_STOPPED,
/** kernel started, but not yet available */
GUEST_STARTING,
/** guest is up and running */
GUEST_RUNNING,
/** guest has been paused */
GUEST_PAUSED,
/** guest is stopping (shutting down) */
GUEST_STOPPING,
};
/**
* string mappings for guest_state_t
*/
extern enum_name_t *guest_state_names;
/**
* Invoke function which lauches the UML guest.
*
* Consoles are all set to NULL, you may change them by adding additional UML
* options to args before invocation.
*
* @param data callback data
* @param guest guest to start
* @param args args to use for guest invocation, args[0] is kernel
* @param argc number of elements in args
* @param idle
* @return PID of child, 0 if failed
*/
typedef pid_t (*invoke_function_t)(void *data, guest_t *guest,
char *args[], int argc);
/**
* Idle function to pass to start().
*/
typedef void (*idle_function_t)(void);
/**
* A guest is a UML instance running on the host.
**/
struct guest_t {
/**
* Get the name of this guest.
*
* @return name of the guest
*/
char* (*get_name) (guest_t *this);
/**
* Get the process ID of the guest child process.
*
* @return name of the guest
*/
pid_t (*get_pid) (guest_t *this);
/**
* Get the state of the guest (stopped, started, etc.).
*
* @return guests state
*/
guest_state_t (*get_state)(guest_t *this);
/**
* Start the guest.
*
* @param invoke UML guest invocation function
* @param data data to pass back to invoke function
* @param idle idle function to call while waiting on child
* @return TRUE if guest successfully started
*/
bool (*start) (guest_t *this, invoke_function_t invoke, void *data,
idle_function_t idle);
/**
* Kill the guest.
*
* @param idle idle function to call while waiting to termination
*/
void (*stop) (guest_t *this, idle_function_t idle);
/**
* Create a new interface in the current scenario.
*
* @param name name of the interface in the guest
* @return created interface, or NULL if failed
*/
iface_t* (*create_iface)(guest_t *this, char *name);
/**
* Destroy an interface on guest.
*
* @param iface interface to destroy
*/
void (*destroy_iface)(guest_t *this, iface_t *iface);
/**
* Create an enumerator over all guest interfaces.
*
* @return enumerator over iface_t's
*/
enumerator_t* (*create_iface_enumerator)(guest_t *this);
/**
* Set the template COWFS overlay to use.
*
* @param parent parent directory where template diff should point to
* @return FALSE if failed
*/
bool (*load_template)(guest_t *this, char *parent);
/**
* Execute a command on the guests mconsole.
*
* @param cb callback to call for each read block
* @param data data to pass to callback
* @param cmd command to execute
* @param ... printf style argument list for cmd
* @return return value
*/
int (*exec)(guest_t *this, void(*cb)(void*,char*,size_t), void *data,
char *cmd, ...);
/**
* Execute a command on the guests mconsole, with output formatter.
*
* If lines is TRUE, callback is invoked for each output line. Otherwise
* the full result is returned in one callback invocation.
*
* @note This function does not work with binary output.
*
* @param cb callback to call for each line or for the complete output
* @param lines TRUE if the callback should be called for each line
* @param data data to pass to callback
* @param cmd command to execute
* @param ... printf style argument list for cmd
* @return return value
*/
int (*exec_str)(guest_t *this, void(*cb)(void*,char*), bool lines,
void *data, char *cmd, ...);
/**
* Called whenever a SIGCHILD for the guests PID is received.
*/
void (*sigchild)(guest_t *this);
/**
* Close and destroy a guest with all interfaces
*/
void (*destroy) (guest_t *this);
};
/**
* Create a new, unstarted guest.
*
* @param parent parent directory to create the guest in
* @param name name of the guest to create
* @param kernel kernel this guest uses
* @param master read-only master filesystem for guest
* @param args additional args to pass to kernel
* @param mem amount of memory to give the guest
*/
guest_t *guest_create(char *parent, char *name, char *kernel,
char *master, char *args);
/**
* Load a guest created with guest_create().
*
* @param parent parent directory to look for a guest
* @param name name of the guest directory
*/
guest_t *guest_load(char *parent, char *name);
#endif /* GUEST_H */
|
