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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 | { | |
e3d4d252 | 39 | const char *shutdown_flag; |
d5dd3498 LC |
40 | int ret, status; |
41 | pid_t rpid, pid; | |
e3d4d252 MR |
42 | |
43 | slog("guest-shutdown called, mode: %s", mode); | |
44 | if (!has_mode || strcmp(mode, "powerdown") == 0) { | |
45 | shutdown_flag = "-P"; | |
46 | } else if (strcmp(mode, "halt") == 0) { | |
47 | shutdown_flag = "-H"; | |
48 | } else if (strcmp(mode, "reboot") == 0) { | |
49 | shutdown_flag = "-r"; | |
50 | } else { | |
51 | error_set(err, QERR_INVALID_PARAMETER_VALUE, "mode", | |
52 | "halt|powerdown|reboot"); | |
53 | return; | |
54 | } | |
55 | ||
d5dd3498 LC |
56 | pid = fork(); |
57 | if (pid == 0) { | |
e3d4d252 MR |
58 | /* child, start the shutdown */ |
59 | setsid(); | |
60 | fclose(stdin); | |
61 | fclose(stdout); | |
62 | fclose(stderr); | |
63 | ||
64 | ret = execl("/sbin/shutdown", "shutdown", shutdown_flag, "+0", | |
65 | "hypervisor initiated shutdown", (char*)NULL); | |
66 | if (ret) { | |
67 | slog("guest-shutdown failed: %s", strerror(errno)); | |
68 | } | |
69 | exit(!!ret); | |
d5dd3498 LC |
70 | } else if (pid < 0) { |
71 | goto exit_err; | |
e3d4d252 | 72 | } |
d5dd3498 LC |
73 | |
74 | do { | |
75 | rpid = waitpid(pid, &status, 0); | |
76 | } while (rpid == -1 && errno == EINTR); | |
77 | if (rpid == pid && WIFEXITED(status) && !WEXITSTATUS(status)) { | |
78 | return; | |
79 | } | |
80 | ||
81 | exit_err: | |
82 | error_set(err, QERR_UNDEFINED_ERROR); | |
e3d4d252 MR |
83 | } |
84 | ||
85 | typedef struct GuestFileHandle { | |
86 | uint64_t id; | |
87 | FILE *fh; | |
88 | QTAILQ_ENTRY(GuestFileHandle) next; | |
89 | } GuestFileHandle; | |
90 | ||
91 | static struct { | |
92 | QTAILQ_HEAD(, GuestFileHandle) filehandles; | |
93 | } guest_file_state; | |
94 | ||
95 | static void guest_file_handle_add(FILE *fh) | |
96 | { | |
97 | GuestFileHandle *gfh; | |
98 | ||
7267c094 | 99 | gfh = g_malloc0(sizeof(GuestFileHandle)); |
e3d4d252 MR |
100 | gfh->id = fileno(fh); |
101 | gfh->fh = fh; | |
102 | QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next); | |
103 | } | |
104 | ||
105 | static GuestFileHandle *guest_file_handle_find(int64_t id) | |
106 | { | |
107 | GuestFileHandle *gfh; | |
108 | ||
109 | QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next) | |
110 | { | |
111 | if (gfh->id == id) { | |
112 | return gfh; | |
113 | } | |
114 | } | |
115 | ||
116 | return NULL; | |
117 | } | |
118 | ||
119 | int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, Error **err) | |
120 | { | |
121 | FILE *fh; | |
122 | int fd; | |
123 | int64_t ret = -1; | |
124 | ||
125 | if (!has_mode) { | |
126 | mode = "r"; | |
127 | } | |
128 | slog("guest-file-open called, filepath: %s, mode: %s", path, mode); | |
129 | fh = fopen(path, mode); | |
130 | if (!fh) { | |
131 | error_set(err, QERR_OPEN_FILE_FAILED, path); | |
132 | return -1; | |
133 | } | |
134 | ||
135 | /* set fd non-blocking to avoid common use cases (like reading from a | |
136 | * named pipe) from hanging the agent | |
137 | */ | |
138 | fd = fileno(fh); | |
139 | ret = fcntl(fd, F_GETFL); | |
140 | ret = fcntl(fd, F_SETFL, ret | O_NONBLOCK); | |
141 | if (ret == -1) { | |
142 | error_set(err, QERR_QGA_COMMAND_FAILED, "fcntl() failed"); | |
143 | fclose(fh); | |
144 | return -1; | |
145 | } | |
146 | ||
147 | guest_file_handle_add(fh); | |
148 | slog("guest-file-open, handle: %d", fd); | |
149 | return fd; | |
150 | } | |
151 | ||
152 | void qmp_guest_file_close(int64_t handle, Error **err) | |
153 | { | |
154 | GuestFileHandle *gfh = guest_file_handle_find(handle); | |
155 | int ret; | |
156 | ||
157 | slog("guest-file-close called, handle: %ld", handle); | |
158 | if (!gfh) { | |
159 | error_set(err, QERR_FD_NOT_FOUND, "handle"); | |
160 | return; | |
161 | } | |
162 | ||
163 | ret = fclose(gfh->fh); | |
164 | if (ret == -1) { | |
165 | error_set(err, QERR_QGA_COMMAND_FAILED, "fclose() failed"); | |
166 | return; | |
167 | } | |
168 | ||
169 | QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next); | |
7267c094 | 170 | g_free(gfh); |
e3d4d252 MR |
171 | } |
172 | ||
173 | struct GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count, | |
174 | int64_t count, Error **err) | |
175 | { | |
176 | GuestFileHandle *gfh = guest_file_handle_find(handle); | |
177 | GuestFileRead *read_data = NULL; | |
178 | guchar *buf; | |
179 | FILE *fh; | |
180 | size_t read_count; | |
181 | ||
182 | if (!gfh) { | |
183 | error_set(err, QERR_FD_NOT_FOUND, "handle"); | |
184 | return NULL; | |
185 | } | |
186 | ||
187 | if (!has_count) { | |
188 | count = QGA_READ_COUNT_DEFAULT; | |
189 | } else if (count < 0) { | |
190 | error_set(err, QERR_INVALID_PARAMETER, "count"); | |
191 | return NULL; | |
192 | } | |
193 | ||
194 | fh = gfh->fh; | |
7267c094 | 195 | buf = g_malloc0(count+1); |
e3d4d252 MR |
196 | read_count = fread(buf, 1, count, fh); |
197 | if (ferror(fh)) { | |
198 | slog("guest-file-read failed, handle: %ld", handle); | |
199 | error_set(err, QERR_QGA_COMMAND_FAILED, "fread() failed"); | |
200 | } else { | |
201 | buf[read_count] = 0; | |
7267c094 | 202 | read_data = g_malloc0(sizeof(GuestFileRead)); |
e3d4d252 MR |
203 | read_data->count = read_count; |
204 | read_data->eof = feof(fh); | |
205 | if (read_count) { | |
206 | read_data->buf_b64 = g_base64_encode(buf, read_count); | |
207 | } | |
208 | } | |
7267c094 | 209 | g_free(buf); |
e3d4d252 MR |
210 | clearerr(fh); |
211 | ||
212 | return read_data; | |
213 | } | |
214 | ||
215 | GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64, | |
216 | bool has_count, int64_t count, Error **err) | |
217 | { | |
218 | GuestFileWrite *write_data = NULL; | |
219 | guchar *buf; | |
220 | gsize buf_len; | |
221 | int write_count; | |
222 | GuestFileHandle *gfh = guest_file_handle_find(handle); | |
223 | FILE *fh; | |
224 | ||
225 | if (!gfh) { | |
226 | error_set(err, QERR_FD_NOT_FOUND, "handle"); | |
227 | return NULL; | |
228 | } | |
229 | ||
230 | fh = gfh->fh; | |
231 | buf = g_base64_decode(buf_b64, &buf_len); | |
232 | ||
233 | if (!has_count) { | |
234 | count = buf_len; | |
235 | } else if (count < 0 || count > buf_len) { | |
7267c094 | 236 | g_free(buf); |
e3d4d252 MR |
237 | error_set(err, QERR_INVALID_PARAMETER, "count"); |
238 | return NULL; | |
239 | } | |
240 | ||
241 | write_count = fwrite(buf, 1, count, fh); | |
242 | if (ferror(fh)) { | |
243 | slog("guest-file-write failed, handle: %ld", handle); | |
244 | error_set(err, QERR_QGA_COMMAND_FAILED, "fwrite() error"); | |
245 | } else { | |
7267c094 | 246 | write_data = g_malloc0(sizeof(GuestFileWrite)); |
e3d4d252 MR |
247 | write_data->count = write_count; |
248 | write_data->eof = feof(fh); | |
249 | } | |
7267c094 | 250 | g_free(buf); |
e3d4d252 MR |
251 | clearerr(fh); |
252 | ||
253 | return write_data; | |
254 | } | |
255 | ||
256 | struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset, | |
257 | int64_t whence, Error **err) | |
258 | { | |
259 | GuestFileHandle *gfh = guest_file_handle_find(handle); | |
260 | GuestFileSeek *seek_data = NULL; | |
261 | FILE *fh; | |
262 | int ret; | |
263 | ||
264 | if (!gfh) { | |
265 | error_set(err, QERR_FD_NOT_FOUND, "handle"); | |
266 | return NULL; | |
267 | } | |
268 | ||
269 | fh = gfh->fh; | |
270 | ret = fseek(fh, offset, whence); | |
271 | if (ret == -1) { | |
272 | error_set(err, QERR_QGA_COMMAND_FAILED, strerror(errno)); | |
273 | } else { | |
7267c094 | 274 | seek_data = g_malloc0(sizeof(GuestFileRead)); |
e3d4d252 MR |
275 | seek_data->position = ftell(fh); |
276 | seek_data->eof = feof(fh); | |
277 | } | |
278 | clearerr(fh); | |
279 | ||
280 | return seek_data; | |
281 | } | |
282 | ||
283 | void qmp_guest_file_flush(int64_t handle, Error **err) | |
284 | { | |
285 | GuestFileHandle *gfh = guest_file_handle_find(handle); | |
286 | FILE *fh; | |
287 | int ret; | |
288 | ||
289 | if (!gfh) { | |
290 | error_set(err, QERR_FD_NOT_FOUND, "handle"); | |
291 | return; | |
292 | } | |
293 | ||
294 | fh = gfh->fh; | |
295 | ret = fflush(fh); | |
296 | if (ret == EOF) { | |
297 | error_set(err, QERR_QGA_COMMAND_FAILED, strerror(errno)); | |
298 | } | |
299 | } | |
300 | ||
301 | static void guest_file_init(void) | |
302 | { | |
303 | QTAILQ_INIT(&guest_file_state.filehandles); | |
304 | } | |
305 | ||
e72c3f2e MR |
306 | /* linux-specific implementations. avoid this if at all possible. */ |
307 | #if defined(__linux__) | |
308 | ||
7006b9cf | 309 | #if defined(CONFIG_FSFREEZE) |
e72c3f2e | 310 | |
e3d4d252 MR |
311 | typedef struct GuestFsfreezeMount { |
312 | char *dirname; | |
313 | char *devtype; | |
314 | QTAILQ_ENTRY(GuestFsfreezeMount) next; | |
315 | } GuestFsfreezeMount; | |
316 | ||
9e8aded4 MR |
317 | typedef QTAILQ_HEAD(, GuestFsfreezeMount) GuestFsfreezeMountList; |
318 | ||
9e8aded4 MR |
319 | static void guest_fsfreeze_free_mount_list(GuestFsfreezeMountList *mounts) |
320 | { | |
321 | GuestFsfreezeMount *mount, *temp; | |
322 | ||
323 | if (!mounts) { | |
324 | return; | |
325 | } | |
326 | ||
327 | QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) { | |
328 | QTAILQ_REMOVE(mounts, mount, next); | |
329 | g_free(mount->dirname); | |
330 | g_free(mount->devtype); | |
331 | g_free(mount); | |
332 | } | |
333 | } | |
334 | ||
e3d4d252 MR |
335 | /* |
336 | * Walk the mount table and build a list of local file systems | |
337 | */ | |
9e8aded4 | 338 | static int guest_fsfreeze_build_mount_list(GuestFsfreezeMountList *mounts) |
e3d4d252 MR |
339 | { |
340 | struct mntent *ment; | |
9e8aded4 | 341 | GuestFsfreezeMount *mount; |
e3d4d252 MR |
342 | char const *mtab = MOUNTED; |
343 | FILE *fp; | |
344 | ||
e3d4d252 MR |
345 | fp = setmntent(mtab, "r"); |
346 | if (!fp) { | |
347 | g_warning("fsfreeze: unable to read mtab"); | |
348 | return -1; | |
349 | } | |
350 | ||
351 | while ((ment = getmntent(fp))) { | |
352 | /* | |
353 | * An entry which device name doesn't start with a '/' is | |
354 | * either a dummy file system or a network file system. | |
355 | * Add special handling for smbfs and cifs as is done by | |
356 | * coreutils as well. | |
357 | */ | |
358 | if ((ment->mnt_fsname[0] != '/') || | |
359 | (strcmp(ment->mnt_type, "smbfs") == 0) || | |
360 | (strcmp(ment->mnt_type, "cifs") == 0)) { | |
361 | continue; | |
362 | } | |
363 | ||
7267c094 AL |
364 | mount = g_malloc0(sizeof(GuestFsfreezeMount)); |
365 | mount->dirname = g_strdup(ment->mnt_dir); | |
366 | mount->devtype = g_strdup(ment->mnt_type); | |
e3d4d252 | 367 | |
9e8aded4 | 368 | QTAILQ_INSERT_TAIL(mounts, mount, next); |
e3d4d252 MR |
369 | } |
370 | ||
371 | endmntent(fp); | |
372 | ||
373 | return 0; | |
374 | } | |
375 | ||
376 | /* | |
377 | * Return status of freeze/thaw | |
378 | */ | |
379 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err) | |
380 | { | |
f22d85e9 MR |
381 | if (ga_is_frozen(ga_state)) { |
382 | return GUEST_FSFREEZE_STATUS_FROZEN; | |
383 | } | |
384 | ||
385 | return GUEST_FSFREEZE_STATUS_THAWED; | |
e3d4d252 MR |
386 | } |
387 | ||
388 | /* | |
389 | * Walk list of mounted file systems in the guest, and freeze the ones which | |
390 | * are real local file systems. | |
391 | */ | |
392 | int64_t qmp_guest_fsfreeze_freeze(Error **err) | |
393 | { | |
394 | int ret = 0, i = 0; | |
9e8aded4 MR |
395 | GuestFsfreezeMountList mounts; |
396 | struct GuestFsfreezeMount *mount; | |
e3d4d252 MR |
397 | int fd; |
398 | char err_msg[512]; | |
399 | ||
400 | slog("guest-fsfreeze called"); | |
401 | ||
9e8aded4 MR |
402 | QTAILQ_INIT(&mounts); |
403 | ret = guest_fsfreeze_build_mount_list(&mounts); | |
e3d4d252 MR |
404 | if (ret < 0) { |
405 | return ret; | |
406 | } | |
407 | ||
408 | /* cannot risk guest agent blocking itself on a write in this state */ | |
f22d85e9 | 409 | ga_set_frozen(ga_state); |
e3d4d252 | 410 | |
9e8aded4 | 411 | QTAILQ_FOREACH(mount, &mounts, next) { |
e3d4d252 MR |
412 | fd = qemu_open(mount->dirname, O_RDONLY); |
413 | if (fd == -1) { | |
9e8aded4 MR |
414 | sprintf(err_msg, "failed to open %s, %s", mount->dirname, |
415 | strerror(errno)); | |
e3d4d252 MR |
416 | error_set(err, QERR_QGA_COMMAND_FAILED, err_msg); |
417 | goto error; | |
418 | } | |
419 | ||
420 | /* we try to cull filesytems we know won't work in advance, but other | |
421 | * filesytems may not implement fsfreeze for less obvious reasons. | |
9e8aded4 MR |
422 | * these will report EOPNOTSUPP. we simply ignore these when tallying |
423 | * the number of frozen filesystems. | |
424 | * | |
425 | * any other error means a failure to freeze a filesystem we | |
426 | * expect to be freezable, so return an error in those cases | |
427 | * and return system to thawed state. | |
e3d4d252 MR |
428 | */ |
429 | ret = ioctl(fd, FIFREEZE); | |
9e8aded4 MR |
430 | if (ret == -1) { |
431 | if (errno != EOPNOTSUPP) { | |
432 | sprintf(err_msg, "failed to freeze %s, %s", | |
433 | mount->dirname, strerror(errno)); | |
434 | error_set(err, QERR_QGA_COMMAND_FAILED, err_msg); | |
435 | close(fd); | |
436 | goto error; | |
437 | } | |
438 | } else { | |
439 | i++; | |
e3d4d252 MR |
440 | } |
441 | close(fd); | |
e3d4d252 MR |
442 | } |
443 | ||
9e8aded4 | 444 | guest_fsfreeze_free_mount_list(&mounts); |
e3d4d252 MR |
445 | return i; |
446 | ||
447 | error: | |
9e8aded4 MR |
448 | guest_fsfreeze_free_mount_list(&mounts); |
449 | qmp_guest_fsfreeze_thaw(NULL); | |
e3d4d252 MR |
450 | return 0; |
451 | } | |
452 | ||
453 | /* | |
454 | * Walk list of frozen file systems in the guest, and thaw them. | |
455 | */ | |
456 | int64_t qmp_guest_fsfreeze_thaw(Error **err) | |
457 | { | |
458 | int ret; | |
9e8aded4 MR |
459 | GuestFsfreezeMountList mounts; |
460 | GuestFsfreezeMount *mount; | |
461 | int fd, i = 0, logged; | |
462 | ||
463 | QTAILQ_INIT(&mounts); | |
464 | ret = guest_fsfreeze_build_mount_list(&mounts); | |
465 | if (ret) { | |
466 | error_set(err, QERR_QGA_COMMAND_FAILED, | |
467 | "failed to enumerate filesystems"); | |
468 | return 0; | |
469 | } | |
e3d4d252 | 470 | |
9e8aded4 MR |
471 | QTAILQ_FOREACH(mount, &mounts, next) { |
472 | logged = false; | |
e3d4d252 MR |
473 | fd = qemu_open(mount->dirname, O_RDONLY); |
474 | if (fd == -1) { | |
e3d4d252 MR |
475 | continue; |
476 | } | |
9e8aded4 MR |
477 | /* we have no way of knowing whether a filesystem was actually unfrozen |
478 | * as a result of a successful call to FITHAW, only that if an error | |
479 | * was returned the filesystem was *not* unfrozen by that particular | |
480 | * call. | |
481 | * | |
a31f0531 | 482 | * since multiple preceding FIFREEZEs require multiple calls to FITHAW |
9e8aded4 MR |
483 | * to unfreeze, continuing issuing FITHAW until an error is returned, |
484 | * in which case either the filesystem is in an unfreezable state, or, | |
485 | * more likely, it was thawed previously (and remains so afterward). | |
486 | * | |
487 | * also, since the most recent successful call is the one that did | |
488 | * the actual unfreeze, we can use this to provide an accurate count | |
489 | * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which | |
490 | * may * be useful for determining whether a filesystem was unfrozen | |
491 | * during the freeze/thaw phase by a process other than qemu-ga. | |
492 | */ | |
493 | do { | |
494 | ret = ioctl(fd, FITHAW); | |
495 | if (ret == 0 && !logged) { | |
496 | i++; | |
497 | logged = true; | |
498 | } | |
499 | } while (ret == 0); | |
e3d4d252 | 500 | close(fd); |
e3d4d252 MR |
501 | } |
502 | ||
f22d85e9 | 503 | ga_unset_frozen(ga_state); |
9e8aded4 | 504 | guest_fsfreeze_free_mount_list(&mounts); |
e3d4d252 MR |
505 | return i; |
506 | } | |
507 | ||
e3d4d252 MR |
508 | static void guest_fsfreeze_cleanup(void) |
509 | { | |
510 | int64_t ret; | |
511 | Error *err = NULL; | |
512 | ||
f22d85e9 | 513 | if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) { |
e3d4d252 MR |
514 | ret = qmp_guest_fsfreeze_thaw(&err); |
515 | if (ret < 0 || err) { | |
516 | slog("failed to clean up frozen filesystems"); | |
517 | } | |
518 | } | |
519 | } | |
e72c3f2e | 520 | #endif /* CONFIG_FSFREEZE */ |
e3d4d252 | 521 | |
11d0f125 LC |
522 | #define LINUX_SYS_STATE_FILE "/sys/power/state" |
523 | #define SUSPEND_SUPPORTED 0 | |
524 | #define SUSPEND_NOT_SUPPORTED 1 | |
525 | ||
11d0f125 LC |
526 | static void bios_supports_mode(const char *pmutils_bin, const char *pmutils_arg, |
527 | const char *sysfile_str, Error **err) | |
528 | { | |
11d0f125 | 529 | char *pmutils_path; |
dc8764f0 LC |
530 | pid_t pid, rpid; |
531 | int status; | |
11d0f125 LC |
532 | |
533 | pmutils_path = g_find_program_in_path(pmutils_bin); | |
534 | ||
535 | pid = fork(); | |
536 | if (!pid) { | |
dc8764f0 LC |
537 | char buf[32]; /* hopefully big enough */ |
538 | ssize_t ret; | |
539 | int fd; | |
11d0f125 LC |
540 | |
541 | setsid(); | |
11d0f125 LC |
542 | reopen_fd_to_null(0); |
543 | reopen_fd_to_null(1); | |
544 | reopen_fd_to_null(2); | |
545 | ||
dc8764f0 LC |
546 | if (pmutils_path) { |
547 | execle(pmutils_path, pmutils_bin, pmutils_arg, NULL, environ); | |
548 | } | |
11d0f125 | 549 | |
dc8764f0 LC |
550 | /* |
551 | * If we get here either pm-utils is not installed or execle() has | |
552 | * failed. Let's try the manual method if the caller wants it. | |
553 | */ | |
11d0f125 | 554 | |
dc8764f0 LC |
555 | if (!sysfile_str) { |
556 | _exit(SUSPEND_NOT_SUPPORTED); | |
557 | } | |
11d0f125 | 558 | |
dc8764f0 LC |
559 | fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); |
560 | if (fd < 0) { | |
11d0f125 LC |
561 | _exit(SUSPEND_NOT_SUPPORTED); |
562 | } | |
563 | ||
dc8764f0 LC |
564 | ret = read(fd, buf, sizeof(buf)-1); |
565 | if (ret <= 0) { | |
566 | _exit(SUSPEND_NOT_SUPPORTED); | |
11d0f125 | 567 | } |
dc8764f0 | 568 | buf[ret] = '\0'; |
11d0f125 | 569 | |
dc8764f0 LC |
570 | if (strstr(buf, sysfile_str)) { |
571 | _exit(SUSPEND_SUPPORTED); | |
11d0f125 LC |
572 | } |
573 | ||
dc8764f0 | 574 | _exit(SUSPEND_NOT_SUPPORTED); |
11d0f125 LC |
575 | } |
576 | ||
11d0f125 LC |
577 | g_free(pmutils_path); |
578 | ||
579 | if (pid < 0) { | |
dc8764f0 LC |
580 | goto undef_err; |
581 | } | |
582 | ||
583 | do { | |
584 | rpid = waitpid(pid, &status, 0); | |
585 | } while (rpid == -1 && errno == EINTR); | |
586 | if (rpid == pid && WIFEXITED(status)) { | |
587 | switch (WEXITSTATUS(status)) { | |
588 | case SUSPEND_SUPPORTED: | |
589 | return; | |
590 | case SUSPEND_NOT_SUPPORTED: | |
591 | error_set(err, QERR_UNSUPPORTED); | |
592 | return; | |
593 | default: | |
594 | goto undef_err; | |
595 | } | |
11d0f125 LC |
596 | } |
597 | ||
dc8764f0 LC |
598 | undef_err: |
599 | error_set(err, QERR_UNDEFINED_ERROR); | |
11d0f125 LC |
600 | } |
601 | ||
602 | static void guest_suspend(const char *pmutils_bin, const char *sysfile_str, | |
603 | Error **err) | |
604 | { | |
11d0f125 | 605 | char *pmutils_path; |
dc8764f0 LC |
606 | pid_t rpid, pid; |
607 | int status; | |
11d0f125 LC |
608 | |
609 | pmutils_path = g_find_program_in_path(pmutils_bin); | |
610 | ||
611 | pid = fork(); | |
612 | if (pid == 0) { | |
613 | /* child */ | |
614 | int fd; | |
615 | ||
616 | setsid(); | |
617 | reopen_fd_to_null(0); | |
618 | reopen_fd_to_null(1); | |
619 | reopen_fd_to_null(2); | |
620 | ||
621 | if (pmutils_path) { | |
622 | execle(pmutils_path, pmutils_bin, NULL, environ); | |
623 | } | |
624 | ||
625 | /* | |
626 | * If we get here either pm-utils is not installed or execle() has | |
627 | * failed. Let's try the manual method if the caller wants it. | |
628 | */ | |
629 | ||
630 | if (!sysfile_str) { | |
631 | _exit(EXIT_FAILURE); | |
632 | } | |
633 | ||
634 | fd = open(LINUX_SYS_STATE_FILE, O_WRONLY); | |
635 | if (fd < 0) { | |
636 | _exit(EXIT_FAILURE); | |
637 | } | |
638 | ||
639 | if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) { | |
640 | _exit(EXIT_FAILURE); | |
641 | } | |
642 | ||
643 | _exit(EXIT_SUCCESS); | |
644 | } | |
645 | ||
646 | g_free(pmutils_path); | |
647 | ||
648 | if (pid < 0) { | |
dc8764f0 LC |
649 | goto exit_err; |
650 | } | |
651 | ||
652 | do { | |
653 | rpid = waitpid(pid, &status, 0); | |
654 | } while (rpid == -1 && errno == EINTR); | |
655 | if (rpid == pid && WIFEXITED(status) && !WEXITSTATUS(status)) { | |
11d0f125 LC |
656 | return; |
657 | } | |
dc8764f0 LC |
658 | |
659 | exit_err: | |
660 | error_set(err, QERR_UNDEFINED_ERROR); | |
11d0f125 LC |
661 | } |
662 | ||
663 | void qmp_guest_suspend_disk(Error **err) | |
664 | { | |
665 | bios_supports_mode("pm-is-supported", "--hibernate", "disk", err); | |
666 | if (error_is_set(err)) { | |
667 | return; | |
668 | } | |
669 | ||
670 | guest_suspend("pm-hibernate", "disk", err); | |
671 | } | |
672 | ||
fbf42210 LC |
673 | void qmp_guest_suspend_ram(Error **err) |
674 | { | |
675 | bios_supports_mode("pm-is-supported", "--suspend", "mem", err); | |
676 | if (error_is_set(err)) { | |
677 | return; | |
678 | } | |
679 | ||
680 | guest_suspend("pm-suspend", "mem", err); | |
681 | } | |
682 | ||
95f4f404 LC |
683 | void qmp_guest_suspend_hybrid(Error **err) |
684 | { | |
685 | bios_supports_mode("pm-is-supported", "--suspend-hybrid", NULL, err); | |
686 | if (error_is_set(err)) { | |
687 | return; | |
688 | } | |
689 | ||
690 | guest_suspend("pm-suspend-hybrid", NULL, err); | |
691 | } | |
692 | ||
3424fc9f MP |
693 | static GuestNetworkInterfaceList * |
694 | guest_find_interface(GuestNetworkInterfaceList *head, | |
695 | const char *name) | |
696 | { | |
697 | for (; head; head = head->next) { | |
698 | if (strcmp(head->value->name, name) == 0) { | |
699 | break; | |
700 | } | |
701 | } | |
702 | ||
703 | return head; | |
704 | } | |
705 | ||
706 | /* | |
707 | * Build information about guest interfaces | |
708 | */ | |
709 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) | |
710 | { | |
711 | GuestNetworkInterfaceList *head = NULL, *cur_item = NULL; | |
712 | struct ifaddrs *ifap, *ifa; | |
713 | char err_msg[512]; | |
714 | ||
715 | if (getifaddrs(&ifap) < 0) { | |
716 | snprintf(err_msg, sizeof(err_msg), | |
717 | "getifaddrs failed: %s", strerror(errno)); | |
718 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
719 | goto error; | |
720 | } | |
721 | ||
722 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { | |
723 | GuestNetworkInterfaceList *info; | |
724 | GuestIpAddressList **address_list = NULL, *address_item = NULL; | |
725 | char addr4[INET_ADDRSTRLEN]; | |
726 | char addr6[INET6_ADDRSTRLEN]; | |
727 | int sock; | |
728 | struct ifreq ifr; | |
729 | unsigned char *mac_addr; | |
730 | void *p; | |
731 | ||
732 | g_debug("Processing %s interface", ifa->ifa_name); | |
733 | ||
734 | info = guest_find_interface(head, ifa->ifa_name); | |
735 | ||
736 | if (!info) { | |
737 | info = g_malloc0(sizeof(*info)); | |
738 | info->value = g_malloc0(sizeof(*info->value)); | |
739 | info->value->name = g_strdup(ifa->ifa_name); | |
740 | ||
741 | if (!cur_item) { | |
742 | head = cur_item = info; | |
743 | } else { | |
744 | cur_item->next = info; | |
745 | cur_item = info; | |
746 | } | |
747 | } | |
748 | ||
749 | if (!info->value->has_hardware_address && | |
750 | ifa->ifa_flags & SIOCGIFHWADDR) { | |
751 | /* we haven't obtained HW address yet */ | |
752 | sock = socket(PF_INET, SOCK_STREAM, 0); | |
753 | if (sock == -1) { | |
754 | snprintf(err_msg, sizeof(err_msg), | |
755 | "failed to create socket: %s", strerror(errno)); | |
756 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
757 | goto error; | |
758 | } | |
759 | ||
760 | memset(&ifr, 0, sizeof(ifr)); | |
761 | strncpy(ifr.ifr_name, info->value->name, IF_NAMESIZE); | |
762 | if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) { | |
763 | snprintf(err_msg, sizeof(err_msg), | |
a31f0531 | 764 | "failed to get MAC address of %s: %s", |
3424fc9f MP |
765 | ifa->ifa_name, |
766 | strerror(errno)); | |
767 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
768 | goto error; | |
769 | } | |
770 | ||
771 | mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data; | |
772 | ||
773 | if (asprintf(&info->value->hardware_address, | |
774 | "%02x:%02x:%02x:%02x:%02x:%02x", | |
775 | (int) mac_addr[0], (int) mac_addr[1], | |
776 | (int) mac_addr[2], (int) mac_addr[3], | |
777 | (int) mac_addr[4], (int) mac_addr[5]) == -1) { | |
778 | snprintf(err_msg, sizeof(err_msg), | |
779 | "failed to format MAC: %s", strerror(errno)); | |
780 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
781 | goto error; | |
782 | } | |
783 | ||
784 | info->value->has_hardware_address = true; | |
785 | close(sock); | |
786 | } | |
787 | ||
788 | if (ifa->ifa_addr && | |
789 | ifa->ifa_addr->sa_family == AF_INET) { | |
790 | /* interface with IPv4 address */ | |
791 | address_item = g_malloc0(sizeof(*address_item)); | |
792 | address_item->value = g_malloc0(sizeof(*address_item->value)); | |
793 | p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr; | |
794 | if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) { | |
795 | snprintf(err_msg, sizeof(err_msg), | |
796 | "inet_ntop failed : %s", strerror(errno)); | |
797 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
798 | goto error; | |
799 | } | |
800 | ||
801 | address_item->value->ip_address = g_strdup(addr4); | |
802 | address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4; | |
803 | ||
804 | if (ifa->ifa_netmask) { | |
805 | /* Count the number of set bits in netmask. | |
806 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
807 | p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr; | |
808 | address_item->value->prefix = ctpop32(((uint32_t *) p)[0]); | |
809 | } | |
810 | } else if (ifa->ifa_addr && | |
811 | ifa->ifa_addr->sa_family == AF_INET6) { | |
812 | /* interface with IPv6 address */ | |
813 | address_item = g_malloc0(sizeof(*address_item)); | |
814 | address_item->value = g_malloc0(sizeof(*address_item->value)); | |
815 | p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr; | |
816 | if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) { | |
817 | snprintf(err_msg, sizeof(err_msg), | |
818 | "inet_ntop failed : %s", strerror(errno)); | |
819 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
820 | goto error; | |
821 | } | |
822 | ||
823 | address_item->value->ip_address = g_strdup(addr6); | |
824 | address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6; | |
825 | ||
826 | if (ifa->ifa_netmask) { | |
827 | /* Count the number of set bits in netmask. | |
828 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
829 | p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr; | |
830 | address_item->value->prefix = | |
831 | ctpop32(((uint32_t *) p)[0]) + | |
832 | ctpop32(((uint32_t *) p)[1]) + | |
833 | ctpop32(((uint32_t *) p)[2]) + | |
834 | ctpop32(((uint32_t *) p)[3]); | |
835 | } | |
836 | } | |
837 | ||
838 | if (!address_item) { | |
839 | continue; | |
840 | } | |
841 | ||
842 | address_list = &info->value->ip_addresses; | |
843 | ||
844 | while (*address_list && (*address_list)->next) { | |
845 | address_list = &(*address_list)->next; | |
846 | } | |
847 | ||
848 | if (!*address_list) { | |
849 | *address_list = address_item; | |
850 | } else { | |
851 | (*address_list)->next = address_item; | |
852 | } | |
853 | ||
854 | info->value->has_ip_addresses = true; | |
855 | ||
856 | ||
857 | } | |
858 | ||
859 | freeifaddrs(ifap); | |
860 | return head; | |
861 | ||
862 | error: | |
863 | freeifaddrs(ifap); | |
864 | qapi_free_GuestNetworkInterfaceList(head); | |
865 | return NULL; | |
866 | } | |
867 | ||
e72c3f2e MR |
868 | #else /* defined(__linux__) */ |
869 | ||
d35d4cb5 | 870 | void qmp_guest_suspend_disk(Error **err) |
e72c3f2e MR |
871 | { |
872 | error_set(err, QERR_UNSUPPORTED); | |
e72c3f2e MR |
873 | } |
874 | ||
d35d4cb5 | 875 | void qmp_guest_suspend_ram(Error **err) |
e72c3f2e MR |
876 | { |
877 | error_set(err, QERR_UNSUPPORTED); | |
e72c3f2e MR |
878 | } |
879 | ||
d35d4cb5 | 880 | void qmp_guest_suspend_hybrid(Error **err) |
e72c3f2e MR |
881 | { |
882 | error_set(err, QERR_UNSUPPORTED); | |
e72c3f2e MR |
883 | } |
884 | ||
d35d4cb5 | 885 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) |
e72c3f2e | 886 | { |
d35d4cb5 MR |
887 | error_set(errp, QERR_UNSUPPORTED); |
888 | return NULL; | |
e72c3f2e MR |
889 | } |
890 | ||
d35d4cb5 MR |
891 | #endif |
892 | ||
893 | #if !defined(CONFIG_FSFREEZE) | |
894 | ||
895 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err) | |
e72c3f2e MR |
896 | { |
897 | error_set(err, QERR_UNSUPPORTED); | |
d35d4cb5 MR |
898 | |
899 | return 0; | |
e72c3f2e MR |
900 | } |
901 | ||
d35d4cb5 | 902 | int64_t qmp_guest_fsfreeze_freeze(Error **err) |
e72c3f2e MR |
903 | { |
904 | error_set(err, QERR_UNSUPPORTED); | |
d35d4cb5 MR |
905 | |
906 | return 0; | |
e72c3f2e MR |
907 | } |
908 | ||
d35d4cb5 | 909 | int64_t qmp_guest_fsfreeze_thaw(Error **err) |
e72c3f2e | 910 | { |
d35d4cb5 MR |
911 | error_set(err, QERR_UNSUPPORTED); |
912 | ||
913 | return 0; | |
e72c3f2e MR |
914 | } |
915 | ||
916 | #endif | |
917 | ||
e3d4d252 MR |
918 | /* register init/cleanup routines for stateful command groups */ |
919 | void ga_command_state_init(GAState *s, GACommandState *cs) | |
920 | { | |
7006b9cf | 921 | #if defined(CONFIG_FSFREEZE) |
f22d85e9 | 922 | ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup); |
7006b9cf | 923 | #endif |
e3d4d252 MR |
924 | ga_command_state_add(cs, guest_file_init, NULL); |
925 | } |