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e3d4d252 | 1 | /* |
42074a9d | 2 | * QEMU Guest Agent POSIX-specific command implementations |
e3d4d252 MR |
3 | * |
4 | * Copyright IBM Corp. 2011 | |
5 | * | |
6 | * Authors: | |
7 | * Michael Roth <mdroth@linux.vnet.ibm.com> | |
3424fc9f | 8 | * Michal Privoznik <mprivozn@redhat.com> |
e3d4d252 MR |
9 | * |
10 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
11 | * See the COPYING file in the top-level directory. | |
12 | */ | |
13 | ||
14 | #include <glib.h> | |
e72c3f2e MR |
15 | #include <sys/types.h> |
16 | #include <sys/ioctl.h> | |
17 | #include "qga/guest-agent-core.h" | |
18 | #include "qga-qmp-commands.h" | |
19 | #include "qerror.h" | |
20 | #include "qemu-queue.h" | |
21 | #include "host-utils.h" | |
4eb36d40 AL |
22 | |
23 | #if defined(__linux__) | |
e3d4d252 | 24 | #include <mntent.h> |
7006b9cf | 25 | #include <linux/fs.h> |
3424fc9f MP |
26 | #include <ifaddrs.h> |
27 | #include <arpa/inet.h> | |
28 | #include <sys/socket.h> | |
29 | #include <net/if.h> | |
11d0f125 | 30 | #include <sys/wait.h> |
e3d4d252 | 31 | |
e72c3f2e MR |
32 | #if defined(__linux__) && defined(FIFREEZE) |
33 | #define CONFIG_FSFREEZE | |
34 | #endif | |
35 | #endif | |
36 | ||
e3d4d252 MR |
37 | void qmp_guest_shutdown(bool has_mode, const char *mode, Error **err) |
38 | { | |
39 | int ret; | |
40 | const char *shutdown_flag; | |
41 | ||
42 | slog("guest-shutdown called, mode: %s", mode); | |
43 | if (!has_mode || strcmp(mode, "powerdown") == 0) { | |
44 | shutdown_flag = "-P"; | |
45 | } else if (strcmp(mode, "halt") == 0) { | |
46 | shutdown_flag = "-H"; | |
47 | } else if (strcmp(mode, "reboot") == 0) { | |
48 | shutdown_flag = "-r"; | |
49 | } else { | |
50 | error_set(err, QERR_INVALID_PARAMETER_VALUE, "mode", | |
51 | "halt|powerdown|reboot"); | |
52 | return; | |
53 | } | |
54 | ||
55 | ret = fork(); | |
56 | if (ret == 0) { | |
57 | /* child, start the shutdown */ | |
58 | setsid(); | |
59 | fclose(stdin); | |
60 | fclose(stdout); | |
61 | fclose(stderr); | |
62 | ||
63 | ret = execl("/sbin/shutdown", "shutdown", shutdown_flag, "+0", | |
64 | "hypervisor initiated shutdown", (char*)NULL); | |
65 | if (ret) { | |
66 | slog("guest-shutdown failed: %s", strerror(errno)); | |
67 | } | |
68 | exit(!!ret); | |
69 | } else if (ret < 0) { | |
70 | error_set(err, QERR_UNDEFINED_ERROR); | |
71 | } | |
72 | } | |
73 | ||
74 | typedef struct GuestFileHandle { | |
75 | uint64_t id; | |
76 | FILE *fh; | |
77 | QTAILQ_ENTRY(GuestFileHandle) next; | |
78 | } GuestFileHandle; | |
79 | ||
80 | static struct { | |
81 | QTAILQ_HEAD(, GuestFileHandle) filehandles; | |
82 | } guest_file_state; | |
83 | ||
84 | static void guest_file_handle_add(FILE *fh) | |
85 | { | |
86 | GuestFileHandle *gfh; | |
87 | ||
7267c094 | 88 | gfh = g_malloc0(sizeof(GuestFileHandle)); |
e3d4d252 MR |
89 | gfh->id = fileno(fh); |
90 | gfh->fh = fh; | |
91 | QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next); | |
92 | } | |
93 | ||
94 | static GuestFileHandle *guest_file_handle_find(int64_t id) | |
95 | { | |
96 | GuestFileHandle *gfh; | |
97 | ||
98 | QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next) | |
99 | { | |
100 | if (gfh->id == id) { | |
101 | return gfh; | |
102 | } | |
103 | } | |
104 | ||
105 | return NULL; | |
106 | } | |
107 | ||
108 | int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, Error **err) | |
109 | { | |
110 | FILE *fh; | |
111 | int fd; | |
112 | int64_t ret = -1; | |
113 | ||
114 | if (!has_mode) { | |
115 | mode = "r"; | |
116 | } | |
117 | slog("guest-file-open called, filepath: %s, mode: %s", path, mode); | |
118 | fh = fopen(path, mode); | |
119 | if (!fh) { | |
120 | error_set(err, QERR_OPEN_FILE_FAILED, path); | |
121 | return -1; | |
122 | } | |
123 | ||
124 | /* set fd non-blocking to avoid common use cases (like reading from a | |
125 | * named pipe) from hanging the agent | |
126 | */ | |
127 | fd = fileno(fh); | |
128 | ret = fcntl(fd, F_GETFL); | |
129 | ret = fcntl(fd, F_SETFL, ret | O_NONBLOCK); | |
130 | if (ret == -1) { | |
131 | error_set(err, QERR_QGA_COMMAND_FAILED, "fcntl() failed"); | |
132 | fclose(fh); | |
133 | return -1; | |
134 | } | |
135 | ||
136 | guest_file_handle_add(fh); | |
137 | slog("guest-file-open, handle: %d", fd); | |
138 | return fd; | |
139 | } | |
140 | ||
141 | void qmp_guest_file_close(int64_t handle, Error **err) | |
142 | { | |
143 | GuestFileHandle *gfh = guest_file_handle_find(handle); | |
144 | int ret; | |
145 | ||
146 | slog("guest-file-close called, handle: %ld", handle); | |
147 | if (!gfh) { | |
148 | error_set(err, QERR_FD_NOT_FOUND, "handle"); | |
149 | return; | |
150 | } | |
151 | ||
152 | ret = fclose(gfh->fh); | |
153 | if (ret == -1) { | |
154 | error_set(err, QERR_QGA_COMMAND_FAILED, "fclose() failed"); | |
155 | return; | |
156 | } | |
157 | ||
158 | QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next); | |
7267c094 | 159 | g_free(gfh); |
e3d4d252 MR |
160 | } |
161 | ||
162 | struct GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count, | |
163 | int64_t count, Error **err) | |
164 | { | |
165 | GuestFileHandle *gfh = guest_file_handle_find(handle); | |
166 | GuestFileRead *read_data = NULL; | |
167 | guchar *buf; | |
168 | FILE *fh; | |
169 | size_t read_count; | |
170 | ||
171 | if (!gfh) { | |
172 | error_set(err, QERR_FD_NOT_FOUND, "handle"); | |
173 | return NULL; | |
174 | } | |
175 | ||
176 | if (!has_count) { | |
177 | count = QGA_READ_COUNT_DEFAULT; | |
178 | } else if (count < 0) { | |
179 | error_set(err, QERR_INVALID_PARAMETER, "count"); | |
180 | return NULL; | |
181 | } | |
182 | ||
183 | fh = gfh->fh; | |
7267c094 | 184 | buf = g_malloc0(count+1); |
e3d4d252 MR |
185 | read_count = fread(buf, 1, count, fh); |
186 | if (ferror(fh)) { | |
187 | slog("guest-file-read failed, handle: %ld", handle); | |
188 | error_set(err, QERR_QGA_COMMAND_FAILED, "fread() failed"); | |
189 | } else { | |
190 | buf[read_count] = 0; | |
7267c094 | 191 | read_data = g_malloc0(sizeof(GuestFileRead)); |
e3d4d252 MR |
192 | read_data->count = read_count; |
193 | read_data->eof = feof(fh); | |
194 | if (read_count) { | |
195 | read_data->buf_b64 = g_base64_encode(buf, read_count); | |
196 | } | |
197 | } | |
7267c094 | 198 | g_free(buf); |
e3d4d252 MR |
199 | clearerr(fh); |
200 | ||
201 | return read_data; | |
202 | } | |
203 | ||
204 | GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64, | |
205 | bool has_count, int64_t count, Error **err) | |
206 | { | |
207 | GuestFileWrite *write_data = NULL; | |
208 | guchar *buf; | |
209 | gsize buf_len; | |
210 | int write_count; | |
211 | GuestFileHandle *gfh = guest_file_handle_find(handle); | |
212 | FILE *fh; | |
213 | ||
214 | if (!gfh) { | |
215 | error_set(err, QERR_FD_NOT_FOUND, "handle"); | |
216 | return NULL; | |
217 | } | |
218 | ||
219 | fh = gfh->fh; | |
220 | buf = g_base64_decode(buf_b64, &buf_len); | |
221 | ||
222 | if (!has_count) { | |
223 | count = buf_len; | |
224 | } else if (count < 0 || count > buf_len) { | |
7267c094 | 225 | g_free(buf); |
e3d4d252 MR |
226 | error_set(err, QERR_INVALID_PARAMETER, "count"); |
227 | return NULL; | |
228 | } | |
229 | ||
230 | write_count = fwrite(buf, 1, count, fh); | |
231 | if (ferror(fh)) { | |
232 | slog("guest-file-write failed, handle: %ld", handle); | |
233 | error_set(err, QERR_QGA_COMMAND_FAILED, "fwrite() error"); | |
234 | } else { | |
7267c094 | 235 | write_data = g_malloc0(sizeof(GuestFileWrite)); |
e3d4d252 MR |
236 | write_data->count = write_count; |
237 | write_data->eof = feof(fh); | |
238 | } | |
7267c094 | 239 | g_free(buf); |
e3d4d252 MR |
240 | clearerr(fh); |
241 | ||
242 | return write_data; | |
243 | } | |
244 | ||
245 | struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset, | |
246 | int64_t whence, Error **err) | |
247 | { | |
248 | GuestFileHandle *gfh = guest_file_handle_find(handle); | |
249 | GuestFileSeek *seek_data = NULL; | |
250 | FILE *fh; | |
251 | int ret; | |
252 | ||
253 | if (!gfh) { | |
254 | error_set(err, QERR_FD_NOT_FOUND, "handle"); | |
255 | return NULL; | |
256 | } | |
257 | ||
258 | fh = gfh->fh; | |
259 | ret = fseek(fh, offset, whence); | |
260 | if (ret == -1) { | |
261 | error_set(err, QERR_QGA_COMMAND_FAILED, strerror(errno)); | |
262 | } else { | |
7267c094 | 263 | seek_data = g_malloc0(sizeof(GuestFileRead)); |
e3d4d252 MR |
264 | seek_data->position = ftell(fh); |
265 | seek_data->eof = feof(fh); | |
266 | } | |
267 | clearerr(fh); | |
268 | ||
269 | return seek_data; | |
270 | } | |
271 | ||
272 | void qmp_guest_file_flush(int64_t handle, Error **err) | |
273 | { | |
274 | GuestFileHandle *gfh = guest_file_handle_find(handle); | |
275 | FILE *fh; | |
276 | int ret; | |
277 | ||
278 | if (!gfh) { | |
279 | error_set(err, QERR_FD_NOT_FOUND, "handle"); | |
280 | return; | |
281 | } | |
282 | ||
283 | fh = gfh->fh; | |
284 | ret = fflush(fh); | |
285 | if (ret == EOF) { | |
286 | error_set(err, QERR_QGA_COMMAND_FAILED, strerror(errno)); | |
287 | } | |
288 | } | |
289 | ||
290 | static void guest_file_init(void) | |
291 | { | |
292 | QTAILQ_INIT(&guest_file_state.filehandles); | |
293 | } | |
294 | ||
e72c3f2e MR |
295 | /* linux-specific implementations. avoid this if at all possible. */ |
296 | #if defined(__linux__) | |
297 | ||
7006b9cf | 298 | #if defined(CONFIG_FSFREEZE) |
e72c3f2e | 299 | |
e3d4d252 MR |
300 | typedef struct GuestFsfreezeMount { |
301 | char *dirname; | |
302 | char *devtype; | |
303 | QTAILQ_ENTRY(GuestFsfreezeMount) next; | |
304 | } GuestFsfreezeMount; | |
305 | ||
9e8aded4 MR |
306 | typedef QTAILQ_HEAD(, GuestFsfreezeMount) GuestFsfreezeMountList; |
307 | ||
9e8aded4 MR |
308 | static void guest_fsfreeze_free_mount_list(GuestFsfreezeMountList *mounts) |
309 | { | |
310 | GuestFsfreezeMount *mount, *temp; | |
311 | ||
312 | if (!mounts) { | |
313 | return; | |
314 | } | |
315 | ||
316 | QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) { | |
317 | QTAILQ_REMOVE(mounts, mount, next); | |
318 | g_free(mount->dirname); | |
319 | g_free(mount->devtype); | |
320 | g_free(mount); | |
321 | } | |
322 | } | |
323 | ||
e3d4d252 MR |
324 | /* |
325 | * Walk the mount table and build a list of local file systems | |
326 | */ | |
9e8aded4 | 327 | static int guest_fsfreeze_build_mount_list(GuestFsfreezeMountList *mounts) |
e3d4d252 MR |
328 | { |
329 | struct mntent *ment; | |
9e8aded4 | 330 | GuestFsfreezeMount *mount; |
e3d4d252 MR |
331 | char const *mtab = MOUNTED; |
332 | FILE *fp; | |
333 | ||
e3d4d252 MR |
334 | fp = setmntent(mtab, "r"); |
335 | if (!fp) { | |
336 | g_warning("fsfreeze: unable to read mtab"); | |
337 | return -1; | |
338 | } | |
339 | ||
340 | while ((ment = getmntent(fp))) { | |
341 | /* | |
342 | * An entry which device name doesn't start with a '/' is | |
343 | * either a dummy file system or a network file system. | |
344 | * Add special handling for smbfs and cifs as is done by | |
345 | * coreutils as well. | |
346 | */ | |
347 | if ((ment->mnt_fsname[0] != '/') || | |
348 | (strcmp(ment->mnt_type, "smbfs") == 0) || | |
349 | (strcmp(ment->mnt_type, "cifs") == 0)) { | |
350 | continue; | |
351 | } | |
352 | ||
7267c094 AL |
353 | mount = g_malloc0(sizeof(GuestFsfreezeMount)); |
354 | mount->dirname = g_strdup(ment->mnt_dir); | |
355 | mount->devtype = g_strdup(ment->mnt_type); | |
e3d4d252 | 356 | |
9e8aded4 | 357 | QTAILQ_INSERT_TAIL(mounts, mount, next); |
e3d4d252 MR |
358 | } |
359 | ||
360 | endmntent(fp); | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
365 | /* | |
366 | * Return status of freeze/thaw | |
367 | */ | |
368 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err) | |
369 | { | |
f22d85e9 MR |
370 | if (ga_is_frozen(ga_state)) { |
371 | return GUEST_FSFREEZE_STATUS_FROZEN; | |
372 | } | |
373 | ||
374 | return GUEST_FSFREEZE_STATUS_THAWED; | |
e3d4d252 MR |
375 | } |
376 | ||
377 | /* | |
378 | * Walk list of mounted file systems in the guest, and freeze the ones which | |
379 | * are real local file systems. | |
380 | */ | |
381 | int64_t qmp_guest_fsfreeze_freeze(Error **err) | |
382 | { | |
383 | int ret = 0, i = 0; | |
9e8aded4 MR |
384 | GuestFsfreezeMountList mounts; |
385 | struct GuestFsfreezeMount *mount; | |
e3d4d252 MR |
386 | int fd; |
387 | char err_msg[512]; | |
388 | ||
389 | slog("guest-fsfreeze called"); | |
390 | ||
9e8aded4 MR |
391 | QTAILQ_INIT(&mounts); |
392 | ret = guest_fsfreeze_build_mount_list(&mounts); | |
e3d4d252 MR |
393 | if (ret < 0) { |
394 | return ret; | |
395 | } | |
396 | ||
397 | /* cannot risk guest agent blocking itself on a write in this state */ | |
f22d85e9 | 398 | ga_set_frozen(ga_state); |
e3d4d252 | 399 | |
9e8aded4 | 400 | QTAILQ_FOREACH(mount, &mounts, next) { |
e3d4d252 MR |
401 | fd = qemu_open(mount->dirname, O_RDONLY); |
402 | if (fd == -1) { | |
9e8aded4 MR |
403 | sprintf(err_msg, "failed to open %s, %s", mount->dirname, |
404 | strerror(errno)); | |
e3d4d252 MR |
405 | error_set(err, QERR_QGA_COMMAND_FAILED, err_msg); |
406 | goto error; | |
407 | } | |
408 | ||
409 | /* we try to cull filesytems we know won't work in advance, but other | |
410 | * filesytems may not implement fsfreeze for less obvious reasons. | |
9e8aded4 MR |
411 | * these will report EOPNOTSUPP. we simply ignore these when tallying |
412 | * the number of frozen filesystems. | |
413 | * | |
414 | * any other error means a failure to freeze a filesystem we | |
415 | * expect to be freezable, so return an error in those cases | |
416 | * and return system to thawed state. | |
e3d4d252 MR |
417 | */ |
418 | ret = ioctl(fd, FIFREEZE); | |
9e8aded4 MR |
419 | if (ret == -1) { |
420 | if (errno != EOPNOTSUPP) { | |
421 | sprintf(err_msg, "failed to freeze %s, %s", | |
422 | mount->dirname, strerror(errno)); | |
423 | error_set(err, QERR_QGA_COMMAND_FAILED, err_msg); | |
424 | close(fd); | |
425 | goto error; | |
426 | } | |
427 | } else { | |
428 | i++; | |
e3d4d252 MR |
429 | } |
430 | close(fd); | |
e3d4d252 MR |
431 | } |
432 | ||
9e8aded4 | 433 | guest_fsfreeze_free_mount_list(&mounts); |
e3d4d252 MR |
434 | return i; |
435 | ||
436 | error: | |
9e8aded4 MR |
437 | guest_fsfreeze_free_mount_list(&mounts); |
438 | qmp_guest_fsfreeze_thaw(NULL); | |
e3d4d252 MR |
439 | return 0; |
440 | } | |
441 | ||
442 | /* | |
443 | * Walk list of frozen file systems in the guest, and thaw them. | |
444 | */ | |
445 | int64_t qmp_guest_fsfreeze_thaw(Error **err) | |
446 | { | |
447 | int ret; | |
9e8aded4 MR |
448 | GuestFsfreezeMountList mounts; |
449 | GuestFsfreezeMount *mount; | |
450 | int fd, i = 0, logged; | |
451 | ||
452 | QTAILQ_INIT(&mounts); | |
453 | ret = guest_fsfreeze_build_mount_list(&mounts); | |
454 | if (ret) { | |
455 | error_set(err, QERR_QGA_COMMAND_FAILED, | |
456 | "failed to enumerate filesystems"); | |
457 | return 0; | |
458 | } | |
e3d4d252 | 459 | |
9e8aded4 MR |
460 | QTAILQ_FOREACH(mount, &mounts, next) { |
461 | logged = false; | |
e3d4d252 MR |
462 | fd = qemu_open(mount->dirname, O_RDONLY); |
463 | if (fd == -1) { | |
e3d4d252 MR |
464 | continue; |
465 | } | |
9e8aded4 MR |
466 | /* we have no way of knowing whether a filesystem was actually unfrozen |
467 | * as a result of a successful call to FITHAW, only that if an error | |
468 | * was returned the filesystem was *not* unfrozen by that particular | |
469 | * call. | |
470 | * | |
a31f0531 | 471 | * since multiple preceding FIFREEZEs require multiple calls to FITHAW |
9e8aded4 MR |
472 | * to unfreeze, continuing issuing FITHAW until an error is returned, |
473 | * in which case either the filesystem is in an unfreezable state, or, | |
474 | * more likely, it was thawed previously (and remains so afterward). | |
475 | * | |
476 | * also, since the most recent successful call is the one that did | |
477 | * the actual unfreeze, we can use this to provide an accurate count | |
478 | * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which | |
479 | * may * be useful for determining whether a filesystem was unfrozen | |
480 | * during the freeze/thaw phase by a process other than qemu-ga. | |
481 | */ | |
482 | do { | |
483 | ret = ioctl(fd, FITHAW); | |
484 | if (ret == 0 && !logged) { | |
485 | i++; | |
486 | logged = true; | |
487 | } | |
488 | } while (ret == 0); | |
e3d4d252 | 489 | close(fd); |
e3d4d252 MR |
490 | } |
491 | ||
f22d85e9 | 492 | ga_unset_frozen(ga_state); |
9e8aded4 | 493 | guest_fsfreeze_free_mount_list(&mounts); |
e3d4d252 MR |
494 | return i; |
495 | } | |
496 | ||
e3d4d252 MR |
497 | static void guest_fsfreeze_cleanup(void) |
498 | { | |
499 | int64_t ret; | |
500 | Error *err = NULL; | |
501 | ||
f22d85e9 | 502 | if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) { |
e3d4d252 MR |
503 | ret = qmp_guest_fsfreeze_thaw(&err); |
504 | if (ret < 0 || err) { | |
505 | slog("failed to clean up frozen filesystems"); | |
506 | } | |
507 | } | |
508 | } | |
e72c3f2e | 509 | #endif /* CONFIG_FSFREEZE */ |
e3d4d252 | 510 | |
11d0f125 LC |
511 | #define LINUX_SYS_STATE_FILE "/sys/power/state" |
512 | #define SUSPEND_SUPPORTED 0 | |
513 | #define SUSPEND_NOT_SUPPORTED 1 | |
514 | ||
515 | /** | |
516 | * This function forks twice and the information about the mode support | |
517 | * status is passed to the qemu-ga process via a pipe. | |
518 | * | |
519 | * This approach allows us to keep the way we reap terminated children | |
520 | * in qemu-ga quite simple. | |
521 | */ | |
522 | static void bios_supports_mode(const char *pmutils_bin, const char *pmutils_arg, | |
523 | const char *sysfile_str, Error **err) | |
524 | { | |
525 | pid_t pid; | |
526 | ssize_t ret; | |
527 | char *pmutils_path; | |
528 | int status, pipefds[2]; | |
529 | ||
530 | if (pipe(pipefds) < 0) { | |
531 | error_set(err, QERR_UNDEFINED_ERROR); | |
532 | return; | |
533 | } | |
534 | ||
535 | pmutils_path = g_find_program_in_path(pmutils_bin); | |
536 | ||
537 | pid = fork(); | |
538 | if (!pid) { | |
539 | struct sigaction act; | |
540 | ||
541 | memset(&act, 0, sizeof(act)); | |
542 | act.sa_handler = SIG_DFL; | |
543 | sigaction(SIGCHLD, &act, NULL); | |
544 | ||
545 | setsid(); | |
546 | close(pipefds[0]); | |
547 | reopen_fd_to_null(0); | |
548 | reopen_fd_to_null(1); | |
549 | reopen_fd_to_null(2); | |
550 | ||
551 | pid = fork(); | |
552 | if (!pid) { | |
553 | int fd; | |
554 | char buf[32]; /* hopefully big enough */ | |
555 | ||
556 | if (pmutils_path) { | |
557 | execle(pmutils_path, pmutils_bin, pmutils_arg, NULL, environ); | |
558 | } | |
559 | ||
560 | /* | |
561 | * If we get here either pm-utils is not installed or execle() has | |
562 | * failed. Let's try the manual method if the caller wants it. | |
563 | */ | |
564 | ||
565 | if (!sysfile_str) { | |
566 | _exit(SUSPEND_NOT_SUPPORTED); | |
567 | } | |
568 | ||
569 | fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); | |
570 | if (fd < 0) { | |
571 | _exit(SUSPEND_NOT_SUPPORTED); | |
572 | } | |
573 | ||
574 | ret = read(fd, buf, sizeof(buf)-1); | |
575 | if (ret <= 0) { | |
576 | _exit(SUSPEND_NOT_SUPPORTED); | |
577 | } | |
578 | buf[ret] = '\0'; | |
579 | ||
580 | if (strstr(buf, sysfile_str)) { | |
581 | _exit(SUSPEND_SUPPORTED); | |
582 | } | |
583 | ||
584 | _exit(SUSPEND_NOT_SUPPORTED); | |
585 | } | |
586 | ||
587 | if (pid > 0) { | |
588 | wait(&status); | |
589 | } else { | |
590 | status = SUSPEND_NOT_SUPPORTED; | |
591 | } | |
592 | ||
593 | ret = write(pipefds[1], &status, sizeof(status)); | |
594 | if (ret != sizeof(status)) { | |
595 | _exit(EXIT_FAILURE); | |
596 | } | |
597 | ||
598 | _exit(EXIT_SUCCESS); | |
599 | } | |
600 | ||
601 | close(pipefds[1]); | |
602 | g_free(pmutils_path); | |
603 | ||
604 | if (pid < 0) { | |
605 | error_set(err, QERR_UNDEFINED_ERROR); | |
606 | goto out; | |
607 | } | |
608 | ||
609 | ret = read(pipefds[0], &status, sizeof(status)); | |
610 | if (ret == sizeof(status) && WIFEXITED(status) && | |
611 | WEXITSTATUS(status) == SUSPEND_SUPPORTED) { | |
612 | goto out; | |
613 | } | |
614 | ||
615 | error_set(err, QERR_UNSUPPORTED); | |
616 | ||
617 | out: | |
618 | close(pipefds[0]); | |
619 | } | |
620 | ||
621 | static void guest_suspend(const char *pmutils_bin, const char *sysfile_str, | |
622 | Error **err) | |
623 | { | |
624 | pid_t pid; | |
625 | char *pmutils_path; | |
626 | ||
627 | pmutils_path = g_find_program_in_path(pmutils_bin); | |
628 | ||
629 | pid = fork(); | |
630 | if (pid == 0) { | |
631 | /* child */ | |
632 | int fd; | |
633 | ||
634 | setsid(); | |
635 | reopen_fd_to_null(0); | |
636 | reopen_fd_to_null(1); | |
637 | reopen_fd_to_null(2); | |
638 | ||
639 | if (pmutils_path) { | |
640 | execle(pmutils_path, pmutils_bin, NULL, environ); | |
641 | } | |
642 | ||
643 | /* | |
644 | * If we get here either pm-utils is not installed or execle() has | |
645 | * failed. Let's try the manual method if the caller wants it. | |
646 | */ | |
647 | ||
648 | if (!sysfile_str) { | |
649 | _exit(EXIT_FAILURE); | |
650 | } | |
651 | ||
652 | fd = open(LINUX_SYS_STATE_FILE, O_WRONLY); | |
653 | if (fd < 0) { | |
654 | _exit(EXIT_FAILURE); | |
655 | } | |
656 | ||
657 | if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) { | |
658 | _exit(EXIT_FAILURE); | |
659 | } | |
660 | ||
661 | _exit(EXIT_SUCCESS); | |
662 | } | |
663 | ||
664 | g_free(pmutils_path); | |
665 | ||
666 | if (pid < 0) { | |
667 | error_set(err, QERR_UNDEFINED_ERROR); | |
668 | return; | |
669 | } | |
670 | } | |
671 | ||
672 | void qmp_guest_suspend_disk(Error **err) | |
673 | { | |
674 | bios_supports_mode("pm-is-supported", "--hibernate", "disk", err); | |
675 | if (error_is_set(err)) { | |
676 | return; | |
677 | } | |
678 | ||
679 | guest_suspend("pm-hibernate", "disk", err); | |
680 | } | |
681 | ||
fbf42210 LC |
682 | void qmp_guest_suspend_ram(Error **err) |
683 | { | |
684 | bios_supports_mode("pm-is-supported", "--suspend", "mem", err); | |
685 | if (error_is_set(err)) { | |
686 | return; | |
687 | } | |
688 | ||
689 | guest_suspend("pm-suspend", "mem", err); | |
690 | } | |
691 | ||
95f4f404 LC |
692 | void qmp_guest_suspend_hybrid(Error **err) |
693 | { | |
694 | bios_supports_mode("pm-is-supported", "--suspend-hybrid", NULL, err); | |
695 | if (error_is_set(err)) { | |
696 | return; | |
697 | } | |
698 | ||
699 | guest_suspend("pm-suspend-hybrid", NULL, err); | |
700 | } | |
701 | ||
3424fc9f MP |
702 | static GuestNetworkInterfaceList * |
703 | guest_find_interface(GuestNetworkInterfaceList *head, | |
704 | const char *name) | |
705 | { | |
706 | for (; head; head = head->next) { | |
707 | if (strcmp(head->value->name, name) == 0) { | |
708 | break; | |
709 | } | |
710 | } | |
711 | ||
712 | return head; | |
713 | } | |
714 | ||
715 | /* | |
716 | * Build information about guest interfaces | |
717 | */ | |
718 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) | |
719 | { | |
720 | GuestNetworkInterfaceList *head = NULL, *cur_item = NULL; | |
721 | struct ifaddrs *ifap, *ifa; | |
722 | char err_msg[512]; | |
723 | ||
724 | if (getifaddrs(&ifap) < 0) { | |
725 | snprintf(err_msg, sizeof(err_msg), | |
726 | "getifaddrs failed: %s", strerror(errno)); | |
727 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
728 | goto error; | |
729 | } | |
730 | ||
731 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { | |
732 | GuestNetworkInterfaceList *info; | |
733 | GuestIpAddressList **address_list = NULL, *address_item = NULL; | |
734 | char addr4[INET_ADDRSTRLEN]; | |
735 | char addr6[INET6_ADDRSTRLEN]; | |
736 | int sock; | |
737 | struct ifreq ifr; | |
738 | unsigned char *mac_addr; | |
739 | void *p; | |
740 | ||
741 | g_debug("Processing %s interface", ifa->ifa_name); | |
742 | ||
743 | info = guest_find_interface(head, ifa->ifa_name); | |
744 | ||
745 | if (!info) { | |
746 | info = g_malloc0(sizeof(*info)); | |
747 | info->value = g_malloc0(sizeof(*info->value)); | |
748 | info->value->name = g_strdup(ifa->ifa_name); | |
749 | ||
750 | if (!cur_item) { | |
751 | head = cur_item = info; | |
752 | } else { | |
753 | cur_item->next = info; | |
754 | cur_item = info; | |
755 | } | |
756 | } | |
757 | ||
758 | if (!info->value->has_hardware_address && | |
759 | ifa->ifa_flags & SIOCGIFHWADDR) { | |
760 | /* we haven't obtained HW address yet */ | |
761 | sock = socket(PF_INET, SOCK_STREAM, 0); | |
762 | if (sock == -1) { | |
763 | snprintf(err_msg, sizeof(err_msg), | |
764 | "failed to create socket: %s", strerror(errno)); | |
765 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
766 | goto error; | |
767 | } | |
768 | ||
769 | memset(&ifr, 0, sizeof(ifr)); | |
770 | strncpy(ifr.ifr_name, info->value->name, IF_NAMESIZE); | |
771 | if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) { | |
772 | snprintf(err_msg, sizeof(err_msg), | |
a31f0531 | 773 | "failed to get MAC address of %s: %s", |
3424fc9f MP |
774 | ifa->ifa_name, |
775 | strerror(errno)); | |
776 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
777 | goto error; | |
778 | } | |
779 | ||
780 | mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data; | |
781 | ||
782 | if (asprintf(&info->value->hardware_address, | |
783 | "%02x:%02x:%02x:%02x:%02x:%02x", | |
784 | (int) mac_addr[0], (int) mac_addr[1], | |
785 | (int) mac_addr[2], (int) mac_addr[3], | |
786 | (int) mac_addr[4], (int) mac_addr[5]) == -1) { | |
787 | snprintf(err_msg, sizeof(err_msg), | |
788 | "failed to format MAC: %s", strerror(errno)); | |
789 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
790 | goto error; | |
791 | } | |
792 | ||
793 | info->value->has_hardware_address = true; | |
794 | close(sock); | |
795 | } | |
796 | ||
797 | if (ifa->ifa_addr && | |
798 | ifa->ifa_addr->sa_family == AF_INET) { | |
799 | /* interface with IPv4 address */ | |
800 | address_item = g_malloc0(sizeof(*address_item)); | |
801 | address_item->value = g_malloc0(sizeof(*address_item->value)); | |
802 | p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr; | |
803 | if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) { | |
804 | snprintf(err_msg, sizeof(err_msg), | |
805 | "inet_ntop failed : %s", strerror(errno)); | |
806 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
807 | goto error; | |
808 | } | |
809 | ||
810 | address_item->value->ip_address = g_strdup(addr4); | |
811 | address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4; | |
812 | ||
813 | if (ifa->ifa_netmask) { | |
814 | /* Count the number of set bits in netmask. | |
815 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
816 | p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr; | |
817 | address_item->value->prefix = ctpop32(((uint32_t *) p)[0]); | |
818 | } | |
819 | } else if (ifa->ifa_addr && | |
820 | ifa->ifa_addr->sa_family == AF_INET6) { | |
821 | /* interface with IPv6 address */ | |
822 | address_item = g_malloc0(sizeof(*address_item)); | |
823 | address_item->value = g_malloc0(sizeof(*address_item->value)); | |
824 | p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr; | |
825 | if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) { | |
826 | snprintf(err_msg, sizeof(err_msg), | |
827 | "inet_ntop failed : %s", strerror(errno)); | |
828 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
829 | goto error; | |
830 | } | |
831 | ||
832 | address_item->value->ip_address = g_strdup(addr6); | |
833 | address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6; | |
834 | ||
835 | if (ifa->ifa_netmask) { | |
836 | /* Count the number of set bits in netmask. | |
837 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
838 | p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr; | |
839 | address_item->value->prefix = | |
840 | ctpop32(((uint32_t *) p)[0]) + | |
841 | ctpop32(((uint32_t *) p)[1]) + | |
842 | ctpop32(((uint32_t *) p)[2]) + | |
843 | ctpop32(((uint32_t *) p)[3]); | |
844 | } | |
845 | } | |
846 | ||
847 | if (!address_item) { | |
848 | continue; | |
849 | } | |
850 | ||
851 | address_list = &info->value->ip_addresses; | |
852 | ||
853 | while (*address_list && (*address_list)->next) { | |
854 | address_list = &(*address_list)->next; | |
855 | } | |
856 | ||
857 | if (!*address_list) { | |
858 | *address_list = address_item; | |
859 | } else { | |
860 | (*address_list)->next = address_item; | |
861 | } | |
862 | ||
863 | info->value->has_ip_addresses = true; | |
864 | ||
865 | ||
866 | } | |
867 | ||
868 | freeifaddrs(ifap); | |
869 | return head; | |
870 | ||
871 | error: | |
872 | freeifaddrs(ifap); | |
873 | qapi_free_GuestNetworkInterfaceList(head); | |
874 | return NULL; | |
875 | } | |
876 | ||
e72c3f2e MR |
877 | #else /* defined(__linux__) */ |
878 | ||
d35d4cb5 | 879 | void qmp_guest_suspend_disk(Error **err) |
e72c3f2e MR |
880 | { |
881 | error_set(err, QERR_UNSUPPORTED); | |
e72c3f2e MR |
882 | } |
883 | ||
d35d4cb5 | 884 | void qmp_guest_suspend_ram(Error **err) |
e72c3f2e MR |
885 | { |
886 | error_set(err, QERR_UNSUPPORTED); | |
e72c3f2e MR |
887 | } |
888 | ||
d35d4cb5 | 889 | void qmp_guest_suspend_hybrid(Error **err) |
e72c3f2e MR |
890 | { |
891 | error_set(err, QERR_UNSUPPORTED); | |
e72c3f2e MR |
892 | } |
893 | ||
d35d4cb5 | 894 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) |
e72c3f2e | 895 | { |
d35d4cb5 MR |
896 | error_set(errp, QERR_UNSUPPORTED); |
897 | return NULL; | |
e72c3f2e MR |
898 | } |
899 | ||
d35d4cb5 MR |
900 | #endif |
901 | ||
902 | #if !defined(CONFIG_FSFREEZE) | |
903 | ||
904 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err) | |
e72c3f2e MR |
905 | { |
906 | error_set(err, QERR_UNSUPPORTED); | |
d35d4cb5 MR |
907 | |
908 | return 0; | |
e72c3f2e MR |
909 | } |
910 | ||
d35d4cb5 | 911 | int64_t qmp_guest_fsfreeze_freeze(Error **err) |
e72c3f2e MR |
912 | { |
913 | error_set(err, QERR_UNSUPPORTED); | |
d35d4cb5 MR |
914 | |
915 | return 0; | |
e72c3f2e MR |
916 | } |
917 | ||
d35d4cb5 | 918 | int64_t qmp_guest_fsfreeze_thaw(Error **err) |
e72c3f2e | 919 | { |
d35d4cb5 MR |
920 | error_set(err, QERR_UNSUPPORTED); |
921 | ||
922 | return 0; | |
e72c3f2e MR |
923 | } |
924 | ||
925 | #endif | |
926 | ||
e3d4d252 MR |
927 | /* register init/cleanup routines for stateful command groups */ |
928 | void ga_command_state_init(GAState *s, GACommandState *cs) | |
929 | { | |
7006b9cf | 930 | #if defined(CONFIG_FSFREEZE) |
f22d85e9 | 931 | ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup); |
7006b9cf | 932 | #endif |
e3d4d252 MR |
933 | ga_command_state_add(cs, guest_file_init, NULL); |
934 | } |