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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> | |
2c02cbf6 | 17 | #include <sys/wait.h> |
e72c3f2e MR |
18 | #include "qga/guest-agent-core.h" |
19 | #include "qga-qmp-commands.h" | |
20 | #include "qerror.h" | |
21 | #include "qemu-queue.h" | |
22 | #include "host-utils.h" | |
4eb36d40 | 23 | |
2c02cbf6 | 24 | #ifndef CONFIG_HAS_ENVIRON |
eecae147 AF |
25 | #ifdef __APPLE__ |
26 | #include <crt_externs.h> | |
27 | #define environ (*_NSGetEnviron()) | |
28 | #else | |
2c02cbf6 LC |
29 | extern char **environ; |
30 | #endif | |
eecae147 | 31 | #endif |
2c02cbf6 | 32 | |
4eb36d40 | 33 | #if defined(__linux__) |
e3d4d252 | 34 | #include <mntent.h> |
7006b9cf | 35 | #include <linux/fs.h> |
3424fc9f MP |
36 | #include <ifaddrs.h> |
37 | #include <arpa/inet.h> | |
38 | #include <sys/socket.h> | |
39 | #include <net/if.h> | |
e3d4d252 | 40 | |
eab5fd59 | 41 | #ifdef FIFREEZE |
e72c3f2e MR |
42 | #define CONFIG_FSFREEZE |
43 | #endif | |
eab5fd59 PB |
44 | #ifdef FITRIM |
45 | #define CONFIG_FSTRIM | |
46 | #endif | |
e72c3f2e MR |
47 | #endif |
48 | ||
e3d4d252 MR |
49 | void qmp_guest_shutdown(bool has_mode, const char *mode, Error **err) |
50 | { | |
e3d4d252 | 51 | const char *shutdown_flag; |
d5dd3498 | 52 | pid_t rpid, pid; |
3674838c | 53 | int status; |
e3d4d252 MR |
54 | |
55 | slog("guest-shutdown called, mode: %s", mode); | |
56 | if (!has_mode || strcmp(mode, "powerdown") == 0) { | |
57 | shutdown_flag = "-P"; | |
58 | } else if (strcmp(mode, "halt") == 0) { | |
59 | shutdown_flag = "-H"; | |
60 | } else if (strcmp(mode, "reboot") == 0) { | |
61 | shutdown_flag = "-r"; | |
62 | } else { | |
63 | error_set(err, QERR_INVALID_PARAMETER_VALUE, "mode", | |
64 | "halt|powerdown|reboot"); | |
65 | return; | |
66 | } | |
67 | ||
d5dd3498 LC |
68 | pid = fork(); |
69 | if (pid == 0) { | |
e3d4d252 MR |
70 | /* child, start the shutdown */ |
71 | setsid(); | |
3674838c LC |
72 | reopen_fd_to_null(0); |
73 | reopen_fd_to_null(1); | |
74 | reopen_fd_to_null(2); | |
e3d4d252 | 75 | |
3674838c LC |
76 | execle("/sbin/shutdown", "shutdown", shutdown_flag, "+0", |
77 | "hypervisor initiated shutdown", (char*)NULL, environ); | |
78 | _exit(EXIT_FAILURE); | |
d5dd3498 LC |
79 | } else if (pid < 0) { |
80 | goto exit_err; | |
e3d4d252 | 81 | } |
d5dd3498 LC |
82 | |
83 | do { | |
84 | rpid = waitpid(pid, &status, 0); | |
85 | } while (rpid == -1 && errno == EINTR); | |
86 | if (rpid == pid && WIFEXITED(status) && !WEXITSTATUS(status)) { | |
87 | return; | |
88 | } | |
89 | ||
90 | exit_err: | |
91 | error_set(err, QERR_UNDEFINED_ERROR); | |
e3d4d252 MR |
92 | } |
93 | ||
94 | typedef struct GuestFileHandle { | |
95 | uint64_t id; | |
96 | FILE *fh; | |
97 | QTAILQ_ENTRY(GuestFileHandle) next; | |
98 | } GuestFileHandle; | |
99 | ||
100 | static struct { | |
101 | QTAILQ_HEAD(, GuestFileHandle) filehandles; | |
102 | } guest_file_state; | |
103 | ||
104 | static void guest_file_handle_add(FILE *fh) | |
105 | { | |
106 | GuestFileHandle *gfh; | |
107 | ||
7267c094 | 108 | gfh = g_malloc0(sizeof(GuestFileHandle)); |
e3d4d252 MR |
109 | gfh->id = fileno(fh); |
110 | gfh->fh = fh; | |
111 | QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next); | |
112 | } | |
113 | ||
114 | static GuestFileHandle *guest_file_handle_find(int64_t id) | |
115 | { | |
116 | GuestFileHandle *gfh; | |
117 | ||
118 | QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next) | |
119 | { | |
120 | if (gfh->id == id) { | |
121 | return gfh; | |
122 | } | |
123 | } | |
124 | ||
125 | return NULL; | |
126 | } | |
127 | ||
128 | int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, Error **err) | |
129 | { | |
130 | FILE *fh; | |
131 | int fd; | |
132 | int64_t ret = -1; | |
133 | ||
134 | if (!has_mode) { | |
135 | mode = "r"; | |
136 | } | |
137 | slog("guest-file-open called, filepath: %s, mode: %s", path, mode); | |
138 | fh = fopen(path, mode); | |
139 | if (!fh) { | |
140 | error_set(err, QERR_OPEN_FILE_FAILED, path); | |
141 | return -1; | |
142 | } | |
143 | ||
144 | /* set fd non-blocking to avoid common use cases (like reading from a | |
145 | * named pipe) from hanging the agent | |
146 | */ | |
147 | fd = fileno(fh); | |
148 | ret = fcntl(fd, F_GETFL); | |
149 | ret = fcntl(fd, F_SETFL, ret | O_NONBLOCK); | |
150 | if (ret == -1) { | |
151 | error_set(err, QERR_QGA_COMMAND_FAILED, "fcntl() failed"); | |
152 | fclose(fh); | |
153 | return -1; | |
154 | } | |
155 | ||
156 | guest_file_handle_add(fh); | |
157 | slog("guest-file-open, handle: %d", fd); | |
158 | return fd; | |
159 | } | |
160 | ||
161 | void qmp_guest_file_close(int64_t handle, Error **err) | |
162 | { | |
163 | GuestFileHandle *gfh = guest_file_handle_find(handle); | |
164 | int ret; | |
165 | ||
166 | slog("guest-file-close called, handle: %ld", handle); | |
167 | if (!gfh) { | |
168 | error_set(err, QERR_FD_NOT_FOUND, "handle"); | |
169 | return; | |
170 | } | |
171 | ||
172 | ret = fclose(gfh->fh); | |
173 | if (ret == -1) { | |
174 | error_set(err, QERR_QGA_COMMAND_FAILED, "fclose() failed"); | |
175 | return; | |
176 | } | |
177 | ||
178 | QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next); | |
7267c094 | 179 | g_free(gfh); |
e3d4d252 MR |
180 | } |
181 | ||
182 | struct GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count, | |
183 | int64_t count, Error **err) | |
184 | { | |
185 | GuestFileHandle *gfh = guest_file_handle_find(handle); | |
186 | GuestFileRead *read_data = NULL; | |
187 | guchar *buf; | |
188 | FILE *fh; | |
189 | size_t read_count; | |
190 | ||
191 | if (!gfh) { | |
192 | error_set(err, QERR_FD_NOT_FOUND, "handle"); | |
193 | return NULL; | |
194 | } | |
195 | ||
196 | if (!has_count) { | |
197 | count = QGA_READ_COUNT_DEFAULT; | |
198 | } else if (count < 0) { | |
199 | error_set(err, QERR_INVALID_PARAMETER, "count"); | |
200 | return NULL; | |
201 | } | |
202 | ||
203 | fh = gfh->fh; | |
7267c094 | 204 | buf = g_malloc0(count+1); |
e3d4d252 MR |
205 | read_count = fread(buf, 1, count, fh); |
206 | if (ferror(fh)) { | |
207 | slog("guest-file-read failed, handle: %ld", handle); | |
208 | error_set(err, QERR_QGA_COMMAND_FAILED, "fread() failed"); | |
209 | } else { | |
210 | buf[read_count] = 0; | |
7267c094 | 211 | read_data = g_malloc0(sizeof(GuestFileRead)); |
e3d4d252 MR |
212 | read_data->count = read_count; |
213 | read_data->eof = feof(fh); | |
214 | if (read_count) { | |
215 | read_data->buf_b64 = g_base64_encode(buf, read_count); | |
216 | } | |
217 | } | |
7267c094 | 218 | g_free(buf); |
e3d4d252 MR |
219 | clearerr(fh); |
220 | ||
221 | return read_data; | |
222 | } | |
223 | ||
224 | GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64, | |
225 | bool has_count, int64_t count, Error **err) | |
226 | { | |
227 | GuestFileWrite *write_data = NULL; | |
228 | guchar *buf; | |
229 | gsize buf_len; | |
230 | int write_count; | |
231 | GuestFileHandle *gfh = guest_file_handle_find(handle); | |
232 | FILE *fh; | |
233 | ||
234 | if (!gfh) { | |
235 | error_set(err, QERR_FD_NOT_FOUND, "handle"); | |
236 | return NULL; | |
237 | } | |
238 | ||
239 | fh = gfh->fh; | |
240 | buf = g_base64_decode(buf_b64, &buf_len); | |
241 | ||
242 | if (!has_count) { | |
243 | count = buf_len; | |
244 | } else if (count < 0 || count > buf_len) { | |
7267c094 | 245 | g_free(buf); |
e3d4d252 MR |
246 | error_set(err, QERR_INVALID_PARAMETER, "count"); |
247 | return NULL; | |
248 | } | |
249 | ||
250 | write_count = fwrite(buf, 1, count, fh); | |
251 | if (ferror(fh)) { | |
252 | slog("guest-file-write failed, handle: %ld", handle); | |
253 | error_set(err, QERR_QGA_COMMAND_FAILED, "fwrite() error"); | |
254 | } else { | |
7267c094 | 255 | write_data = g_malloc0(sizeof(GuestFileWrite)); |
e3d4d252 MR |
256 | write_data->count = write_count; |
257 | write_data->eof = feof(fh); | |
258 | } | |
7267c094 | 259 | g_free(buf); |
e3d4d252 MR |
260 | clearerr(fh); |
261 | ||
262 | return write_data; | |
263 | } | |
264 | ||
265 | struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset, | |
266 | int64_t whence, Error **err) | |
267 | { | |
268 | GuestFileHandle *gfh = guest_file_handle_find(handle); | |
269 | GuestFileSeek *seek_data = NULL; | |
270 | FILE *fh; | |
271 | int ret; | |
272 | ||
273 | if (!gfh) { | |
274 | error_set(err, QERR_FD_NOT_FOUND, "handle"); | |
275 | return NULL; | |
276 | } | |
277 | ||
278 | fh = gfh->fh; | |
279 | ret = fseek(fh, offset, whence); | |
280 | if (ret == -1) { | |
281 | error_set(err, QERR_QGA_COMMAND_FAILED, strerror(errno)); | |
282 | } else { | |
7267c094 | 283 | seek_data = g_malloc0(sizeof(GuestFileRead)); |
e3d4d252 MR |
284 | seek_data->position = ftell(fh); |
285 | seek_data->eof = feof(fh); | |
286 | } | |
287 | clearerr(fh); | |
288 | ||
289 | return seek_data; | |
290 | } | |
291 | ||
292 | void qmp_guest_file_flush(int64_t handle, Error **err) | |
293 | { | |
294 | GuestFileHandle *gfh = guest_file_handle_find(handle); | |
295 | FILE *fh; | |
296 | int ret; | |
297 | ||
298 | if (!gfh) { | |
299 | error_set(err, QERR_FD_NOT_FOUND, "handle"); | |
300 | return; | |
301 | } | |
302 | ||
303 | fh = gfh->fh; | |
304 | ret = fflush(fh); | |
305 | if (ret == EOF) { | |
306 | error_set(err, QERR_QGA_COMMAND_FAILED, strerror(errno)); | |
307 | } | |
308 | } | |
309 | ||
310 | static void guest_file_init(void) | |
311 | { | |
312 | QTAILQ_INIT(&guest_file_state.filehandles); | |
313 | } | |
314 | ||
e72c3f2e MR |
315 | /* linux-specific implementations. avoid this if at all possible. */ |
316 | #if defined(__linux__) | |
317 | ||
eab5fd59 | 318 | #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) |
af02203f | 319 | typedef struct FsMount { |
e3d4d252 MR |
320 | char *dirname; |
321 | char *devtype; | |
af02203f PB |
322 | QTAILQ_ENTRY(FsMount) next; |
323 | } FsMount; | |
e3d4d252 | 324 | |
af02203f | 325 | typedef QTAILQ_HEAD(, FsMount) FsMountList; |
9e8aded4 | 326 | |
af02203f | 327 | static void free_fs_mount_list(FsMountList *mounts) |
9e8aded4 | 328 | { |
af02203f | 329 | FsMount *mount, *temp; |
9e8aded4 MR |
330 | |
331 | if (!mounts) { | |
332 | return; | |
333 | } | |
334 | ||
335 | QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) { | |
336 | QTAILQ_REMOVE(mounts, mount, next); | |
337 | g_free(mount->dirname); | |
338 | g_free(mount->devtype); | |
339 | g_free(mount); | |
340 | } | |
341 | } | |
342 | ||
e3d4d252 MR |
343 | /* |
344 | * Walk the mount table and build a list of local file systems | |
345 | */ | |
af02203f | 346 | static int build_fs_mount_list(FsMountList *mounts) |
e3d4d252 MR |
347 | { |
348 | struct mntent *ment; | |
af02203f | 349 | FsMount *mount; |
9e2fa418 | 350 | char const *mtab = "/proc/self/mounts"; |
e3d4d252 MR |
351 | FILE *fp; |
352 | ||
e3d4d252 MR |
353 | fp = setmntent(mtab, "r"); |
354 | if (!fp) { | |
355 | g_warning("fsfreeze: unable to read mtab"); | |
356 | return -1; | |
357 | } | |
358 | ||
359 | while ((ment = getmntent(fp))) { | |
360 | /* | |
361 | * An entry which device name doesn't start with a '/' is | |
362 | * either a dummy file system or a network file system. | |
363 | * Add special handling for smbfs and cifs as is done by | |
364 | * coreutils as well. | |
365 | */ | |
366 | if ((ment->mnt_fsname[0] != '/') || | |
367 | (strcmp(ment->mnt_type, "smbfs") == 0) || | |
368 | (strcmp(ment->mnt_type, "cifs") == 0)) { | |
369 | continue; | |
370 | } | |
371 | ||
af02203f | 372 | mount = g_malloc0(sizeof(FsMount)); |
7267c094 AL |
373 | mount->dirname = g_strdup(ment->mnt_dir); |
374 | mount->devtype = g_strdup(ment->mnt_type); | |
e3d4d252 | 375 | |
9e8aded4 | 376 | QTAILQ_INSERT_TAIL(mounts, mount, next); |
e3d4d252 MR |
377 | } |
378 | ||
379 | endmntent(fp); | |
380 | ||
381 | return 0; | |
382 | } | |
eab5fd59 PB |
383 | #endif |
384 | ||
385 | #if defined(CONFIG_FSFREEZE) | |
e3d4d252 MR |
386 | |
387 | /* | |
388 | * Return status of freeze/thaw | |
389 | */ | |
390 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err) | |
391 | { | |
f22d85e9 MR |
392 | if (ga_is_frozen(ga_state)) { |
393 | return GUEST_FSFREEZE_STATUS_FROZEN; | |
394 | } | |
395 | ||
396 | return GUEST_FSFREEZE_STATUS_THAWED; | |
e3d4d252 MR |
397 | } |
398 | ||
399 | /* | |
400 | * Walk list of mounted file systems in the guest, and freeze the ones which | |
401 | * are real local file systems. | |
402 | */ | |
403 | int64_t qmp_guest_fsfreeze_freeze(Error **err) | |
404 | { | |
405 | int ret = 0, i = 0; | |
af02203f PB |
406 | FsMountList mounts; |
407 | struct FsMount *mount; | |
e3d4d252 MR |
408 | int fd; |
409 | char err_msg[512]; | |
410 | ||
411 | slog("guest-fsfreeze called"); | |
412 | ||
9e8aded4 | 413 | QTAILQ_INIT(&mounts); |
af02203f | 414 | ret = build_fs_mount_list(&mounts); |
e3d4d252 MR |
415 | if (ret < 0) { |
416 | return ret; | |
417 | } | |
418 | ||
419 | /* cannot risk guest agent blocking itself on a write in this state */ | |
f22d85e9 | 420 | ga_set_frozen(ga_state); |
e3d4d252 | 421 | |
9e8aded4 | 422 | QTAILQ_FOREACH(mount, &mounts, next) { |
e3d4d252 MR |
423 | fd = qemu_open(mount->dirname, O_RDONLY); |
424 | if (fd == -1) { | |
9e8aded4 MR |
425 | sprintf(err_msg, "failed to open %s, %s", mount->dirname, |
426 | strerror(errno)); | |
e3d4d252 MR |
427 | error_set(err, QERR_QGA_COMMAND_FAILED, err_msg); |
428 | goto error; | |
429 | } | |
430 | ||
431 | /* we try to cull filesytems we know won't work in advance, but other | |
432 | * filesytems may not implement fsfreeze for less obvious reasons. | |
9e8aded4 MR |
433 | * these will report EOPNOTSUPP. we simply ignore these when tallying |
434 | * the number of frozen filesystems. | |
435 | * | |
436 | * any other error means a failure to freeze a filesystem we | |
437 | * expect to be freezable, so return an error in those cases | |
438 | * and return system to thawed state. | |
e3d4d252 MR |
439 | */ |
440 | ret = ioctl(fd, FIFREEZE); | |
9e8aded4 MR |
441 | if (ret == -1) { |
442 | if (errno != EOPNOTSUPP) { | |
443 | sprintf(err_msg, "failed to freeze %s, %s", | |
444 | mount->dirname, strerror(errno)); | |
445 | error_set(err, QERR_QGA_COMMAND_FAILED, err_msg); | |
446 | close(fd); | |
447 | goto error; | |
448 | } | |
449 | } else { | |
450 | i++; | |
e3d4d252 MR |
451 | } |
452 | close(fd); | |
e3d4d252 MR |
453 | } |
454 | ||
af02203f | 455 | free_fs_mount_list(&mounts); |
e3d4d252 MR |
456 | return i; |
457 | ||
458 | error: | |
af02203f | 459 | free_fs_mount_list(&mounts); |
9e8aded4 | 460 | qmp_guest_fsfreeze_thaw(NULL); |
e3d4d252 MR |
461 | return 0; |
462 | } | |
463 | ||
464 | /* | |
465 | * Walk list of frozen file systems in the guest, and thaw them. | |
466 | */ | |
467 | int64_t qmp_guest_fsfreeze_thaw(Error **err) | |
468 | { | |
469 | int ret; | |
af02203f PB |
470 | FsMountList mounts; |
471 | FsMount *mount; | |
9e8aded4 MR |
472 | int fd, i = 0, logged; |
473 | ||
474 | QTAILQ_INIT(&mounts); | |
af02203f | 475 | ret = build_fs_mount_list(&mounts); |
9e8aded4 MR |
476 | if (ret) { |
477 | error_set(err, QERR_QGA_COMMAND_FAILED, | |
478 | "failed to enumerate filesystems"); | |
479 | return 0; | |
480 | } | |
e3d4d252 | 481 | |
9e8aded4 MR |
482 | QTAILQ_FOREACH(mount, &mounts, next) { |
483 | logged = false; | |
e3d4d252 MR |
484 | fd = qemu_open(mount->dirname, O_RDONLY); |
485 | if (fd == -1) { | |
e3d4d252 MR |
486 | continue; |
487 | } | |
9e8aded4 MR |
488 | /* we have no way of knowing whether a filesystem was actually unfrozen |
489 | * as a result of a successful call to FITHAW, only that if an error | |
490 | * was returned the filesystem was *not* unfrozen by that particular | |
491 | * call. | |
492 | * | |
a31f0531 | 493 | * since multiple preceding FIFREEZEs require multiple calls to FITHAW |
9e8aded4 MR |
494 | * to unfreeze, continuing issuing FITHAW until an error is returned, |
495 | * in which case either the filesystem is in an unfreezable state, or, | |
496 | * more likely, it was thawed previously (and remains so afterward). | |
497 | * | |
498 | * also, since the most recent successful call is the one that did | |
499 | * the actual unfreeze, we can use this to provide an accurate count | |
500 | * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which | |
501 | * may * be useful for determining whether a filesystem was unfrozen | |
502 | * during the freeze/thaw phase by a process other than qemu-ga. | |
503 | */ | |
504 | do { | |
505 | ret = ioctl(fd, FITHAW); | |
506 | if (ret == 0 && !logged) { | |
507 | i++; | |
508 | logged = true; | |
509 | } | |
510 | } while (ret == 0); | |
e3d4d252 | 511 | close(fd); |
e3d4d252 MR |
512 | } |
513 | ||
f22d85e9 | 514 | ga_unset_frozen(ga_state); |
af02203f | 515 | free_fs_mount_list(&mounts); |
e3d4d252 MR |
516 | return i; |
517 | } | |
518 | ||
e3d4d252 MR |
519 | static void guest_fsfreeze_cleanup(void) |
520 | { | |
521 | int64_t ret; | |
522 | Error *err = NULL; | |
523 | ||
f22d85e9 | 524 | if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) { |
e3d4d252 MR |
525 | ret = qmp_guest_fsfreeze_thaw(&err); |
526 | if (ret < 0 || err) { | |
527 | slog("failed to clean up frozen filesystems"); | |
528 | } | |
529 | } | |
530 | } | |
e72c3f2e | 531 | #endif /* CONFIG_FSFREEZE */ |
e3d4d252 | 532 | |
eab5fd59 PB |
533 | #if defined(CONFIG_FSTRIM) |
534 | /* | |
535 | * Walk list of mounted file systems in the guest, and trim them. | |
536 | */ | |
537 | void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err) | |
538 | { | |
539 | int ret = 0; | |
540 | FsMountList mounts; | |
541 | struct FsMount *mount; | |
542 | int fd; | |
543 | char err_msg[512]; | |
544 | struct fstrim_range r = { | |
545 | .start = 0, | |
546 | .len = -1, | |
547 | .minlen = has_minimum ? minimum : 0, | |
548 | }; | |
549 | ||
550 | slog("guest-fstrim called"); | |
551 | ||
552 | QTAILQ_INIT(&mounts); | |
553 | ret = build_fs_mount_list(&mounts); | |
554 | if (ret < 0) { | |
555 | return; | |
556 | } | |
557 | ||
558 | QTAILQ_FOREACH(mount, &mounts, next) { | |
559 | fd = qemu_open(mount->dirname, O_RDONLY); | |
560 | if (fd == -1) { | |
561 | sprintf(err_msg, "failed to open %s, %s", mount->dirname, | |
562 | strerror(errno)); | |
563 | error_set(err, QERR_QGA_COMMAND_FAILED, err_msg); | |
564 | goto error; | |
565 | } | |
566 | ||
567 | /* We try to cull filesytems we know won't work in advance, but other | |
568 | * filesytems may not implement fstrim for less obvious reasons. These | |
569 | * will report EOPNOTSUPP; we simply ignore these errors. Any other | |
570 | * error means an unexpected error, so return it in those cases. In | |
571 | * some other cases ENOTTY will be reported (e.g. CD-ROMs). | |
572 | */ | |
573 | ret = ioctl(fd, FITRIM, &r); | |
574 | if (ret == -1) { | |
575 | if (errno != ENOTTY && errno != EOPNOTSUPP) { | |
576 | sprintf(err_msg, "failed to trim %s, %s", | |
577 | mount->dirname, strerror(errno)); | |
578 | error_set(err, QERR_QGA_COMMAND_FAILED, err_msg); | |
579 | close(fd); | |
580 | goto error; | |
581 | } | |
582 | } | |
583 | close(fd); | |
584 | } | |
585 | ||
586 | error: | |
587 | free_fs_mount_list(&mounts); | |
588 | } | |
589 | #endif /* CONFIG_FSTRIM */ | |
590 | ||
591 | ||
11d0f125 LC |
592 | #define LINUX_SYS_STATE_FILE "/sys/power/state" |
593 | #define SUSPEND_SUPPORTED 0 | |
594 | #define SUSPEND_NOT_SUPPORTED 1 | |
595 | ||
11d0f125 LC |
596 | static void bios_supports_mode(const char *pmutils_bin, const char *pmutils_arg, |
597 | const char *sysfile_str, Error **err) | |
598 | { | |
11d0f125 | 599 | char *pmutils_path; |
dc8764f0 LC |
600 | pid_t pid, rpid; |
601 | int status; | |
11d0f125 LC |
602 | |
603 | pmutils_path = g_find_program_in_path(pmutils_bin); | |
604 | ||
605 | pid = fork(); | |
606 | if (!pid) { | |
dc8764f0 LC |
607 | char buf[32]; /* hopefully big enough */ |
608 | ssize_t ret; | |
609 | int fd; | |
11d0f125 LC |
610 | |
611 | setsid(); | |
11d0f125 LC |
612 | reopen_fd_to_null(0); |
613 | reopen_fd_to_null(1); | |
614 | reopen_fd_to_null(2); | |
615 | ||
dc8764f0 LC |
616 | if (pmutils_path) { |
617 | execle(pmutils_path, pmutils_bin, pmutils_arg, NULL, environ); | |
618 | } | |
11d0f125 | 619 | |
dc8764f0 LC |
620 | /* |
621 | * If we get here either pm-utils is not installed or execle() has | |
622 | * failed. Let's try the manual method if the caller wants it. | |
623 | */ | |
11d0f125 | 624 | |
dc8764f0 LC |
625 | if (!sysfile_str) { |
626 | _exit(SUSPEND_NOT_SUPPORTED); | |
627 | } | |
11d0f125 | 628 | |
dc8764f0 LC |
629 | fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); |
630 | if (fd < 0) { | |
11d0f125 LC |
631 | _exit(SUSPEND_NOT_SUPPORTED); |
632 | } | |
633 | ||
dc8764f0 LC |
634 | ret = read(fd, buf, sizeof(buf)-1); |
635 | if (ret <= 0) { | |
636 | _exit(SUSPEND_NOT_SUPPORTED); | |
11d0f125 | 637 | } |
dc8764f0 | 638 | buf[ret] = '\0'; |
11d0f125 | 639 | |
dc8764f0 LC |
640 | if (strstr(buf, sysfile_str)) { |
641 | _exit(SUSPEND_SUPPORTED); | |
11d0f125 LC |
642 | } |
643 | ||
dc8764f0 | 644 | _exit(SUSPEND_NOT_SUPPORTED); |
11d0f125 LC |
645 | } |
646 | ||
11d0f125 LC |
647 | g_free(pmutils_path); |
648 | ||
649 | if (pid < 0) { | |
dc8764f0 LC |
650 | goto undef_err; |
651 | } | |
652 | ||
653 | do { | |
654 | rpid = waitpid(pid, &status, 0); | |
655 | } while (rpid == -1 && errno == EINTR); | |
656 | if (rpid == pid && WIFEXITED(status)) { | |
657 | switch (WEXITSTATUS(status)) { | |
658 | case SUSPEND_SUPPORTED: | |
659 | return; | |
660 | case SUSPEND_NOT_SUPPORTED: | |
661 | error_set(err, QERR_UNSUPPORTED); | |
662 | return; | |
663 | default: | |
664 | goto undef_err; | |
665 | } | |
11d0f125 LC |
666 | } |
667 | ||
dc8764f0 LC |
668 | undef_err: |
669 | error_set(err, QERR_UNDEFINED_ERROR); | |
11d0f125 LC |
670 | } |
671 | ||
672 | static void guest_suspend(const char *pmutils_bin, const char *sysfile_str, | |
673 | Error **err) | |
674 | { | |
11d0f125 | 675 | char *pmutils_path; |
dc8764f0 LC |
676 | pid_t rpid, pid; |
677 | int status; | |
11d0f125 LC |
678 | |
679 | pmutils_path = g_find_program_in_path(pmutils_bin); | |
680 | ||
681 | pid = fork(); | |
682 | if (pid == 0) { | |
683 | /* child */ | |
684 | int fd; | |
685 | ||
686 | setsid(); | |
687 | reopen_fd_to_null(0); | |
688 | reopen_fd_to_null(1); | |
689 | reopen_fd_to_null(2); | |
690 | ||
691 | if (pmutils_path) { | |
692 | execle(pmutils_path, pmutils_bin, NULL, environ); | |
693 | } | |
694 | ||
695 | /* | |
696 | * If we get here either pm-utils is not installed or execle() has | |
697 | * failed. Let's try the manual method if the caller wants it. | |
698 | */ | |
699 | ||
700 | if (!sysfile_str) { | |
701 | _exit(EXIT_FAILURE); | |
702 | } | |
703 | ||
704 | fd = open(LINUX_SYS_STATE_FILE, O_WRONLY); | |
705 | if (fd < 0) { | |
706 | _exit(EXIT_FAILURE); | |
707 | } | |
708 | ||
709 | if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) { | |
710 | _exit(EXIT_FAILURE); | |
711 | } | |
712 | ||
713 | _exit(EXIT_SUCCESS); | |
714 | } | |
715 | ||
716 | g_free(pmutils_path); | |
717 | ||
718 | if (pid < 0) { | |
dc8764f0 LC |
719 | goto exit_err; |
720 | } | |
721 | ||
722 | do { | |
723 | rpid = waitpid(pid, &status, 0); | |
724 | } while (rpid == -1 && errno == EINTR); | |
725 | if (rpid == pid && WIFEXITED(status) && !WEXITSTATUS(status)) { | |
11d0f125 LC |
726 | return; |
727 | } | |
dc8764f0 LC |
728 | |
729 | exit_err: | |
730 | error_set(err, QERR_UNDEFINED_ERROR); | |
11d0f125 LC |
731 | } |
732 | ||
733 | void qmp_guest_suspend_disk(Error **err) | |
734 | { | |
735 | bios_supports_mode("pm-is-supported", "--hibernate", "disk", err); | |
736 | if (error_is_set(err)) { | |
737 | return; | |
738 | } | |
739 | ||
740 | guest_suspend("pm-hibernate", "disk", err); | |
741 | } | |
742 | ||
fbf42210 LC |
743 | void qmp_guest_suspend_ram(Error **err) |
744 | { | |
745 | bios_supports_mode("pm-is-supported", "--suspend", "mem", err); | |
746 | if (error_is_set(err)) { | |
747 | return; | |
748 | } | |
749 | ||
750 | guest_suspend("pm-suspend", "mem", err); | |
751 | } | |
752 | ||
95f4f404 LC |
753 | void qmp_guest_suspend_hybrid(Error **err) |
754 | { | |
755 | bios_supports_mode("pm-is-supported", "--suspend-hybrid", NULL, err); | |
756 | if (error_is_set(err)) { | |
757 | return; | |
758 | } | |
759 | ||
760 | guest_suspend("pm-suspend-hybrid", NULL, err); | |
761 | } | |
762 | ||
3424fc9f MP |
763 | static GuestNetworkInterfaceList * |
764 | guest_find_interface(GuestNetworkInterfaceList *head, | |
765 | const char *name) | |
766 | { | |
767 | for (; head; head = head->next) { | |
768 | if (strcmp(head->value->name, name) == 0) { | |
769 | break; | |
770 | } | |
771 | } | |
772 | ||
773 | return head; | |
774 | } | |
775 | ||
776 | /* | |
777 | * Build information about guest interfaces | |
778 | */ | |
779 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) | |
780 | { | |
781 | GuestNetworkInterfaceList *head = NULL, *cur_item = NULL; | |
782 | struct ifaddrs *ifap, *ifa; | |
783 | char err_msg[512]; | |
784 | ||
785 | if (getifaddrs(&ifap) < 0) { | |
786 | snprintf(err_msg, sizeof(err_msg), | |
787 | "getifaddrs failed: %s", strerror(errno)); | |
788 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
789 | goto error; | |
790 | } | |
791 | ||
792 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { | |
793 | GuestNetworkInterfaceList *info; | |
794 | GuestIpAddressList **address_list = NULL, *address_item = NULL; | |
795 | char addr4[INET_ADDRSTRLEN]; | |
796 | char addr6[INET6_ADDRSTRLEN]; | |
797 | int sock; | |
798 | struct ifreq ifr; | |
799 | unsigned char *mac_addr; | |
800 | void *p; | |
801 | ||
802 | g_debug("Processing %s interface", ifa->ifa_name); | |
803 | ||
804 | info = guest_find_interface(head, ifa->ifa_name); | |
805 | ||
806 | if (!info) { | |
807 | info = g_malloc0(sizeof(*info)); | |
808 | info->value = g_malloc0(sizeof(*info->value)); | |
809 | info->value->name = g_strdup(ifa->ifa_name); | |
810 | ||
811 | if (!cur_item) { | |
812 | head = cur_item = info; | |
813 | } else { | |
814 | cur_item->next = info; | |
815 | cur_item = info; | |
816 | } | |
817 | } | |
818 | ||
819 | if (!info->value->has_hardware_address && | |
820 | ifa->ifa_flags & SIOCGIFHWADDR) { | |
821 | /* we haven't obtained HW address yet */ | |
822 | sock = socket(PF_INET, SOCK_STREAM, 0); | |
823 | if (sock == -1) { | |
824 | snprintf(err_msg, sizeof(err_msg), | |
825 | "failed to create socket: %s", strerror(errno)); | |
826 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
827 | goto error; | |
828 | } | |
829 | ||
830 | memset(&ifr, 0, sizeof(ifr)); | |
1ab516ed | 831 | pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->value->name); |
3424fc9f MP |
832 | if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) { |
833 | snprintf(err_msg, sizeof(err_msg), | |
a31f0531 | 834 | "failed to get MAC address of %s: %s", |
3424fc9f MP |
835 | ifa->ifa_name, |
836 | strerror(errno)); | |
837 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
838 | goto error; | |
839 | } | |
840 | ||
841 | mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data; | |
842 | ||
843 | if (asprintf(&info->value->hardware_address, | |
844 | "%02x:%02x:%02x:%02x:%02x:%02x", | |
845 | (int) mac_addr[0], (int) mac_addr[1], | |
846 | (int) mac_addr[2], (int) mac_addr[3], | |
847 | (int) mac_addr[4], (int) mac_addr[5]) == -1) { | |
848 | snprintf(err_msg, sizeof(err_msg), | |
849 | "failed to format MAC: %s", strerror(errno)); | |
850 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
851 | goto error; | |
852 | } | |
853 | ||
854 | info->value->has_hardware_address = true; | |
855 | close(sock); | |
856 | } | |
857 | ||
858 | if (ifa->ifa_addr && | |
859 | ifa->ifa_addr->sa_family == AF_INET) { | |
860 | /* interface with IPv4 address */ | |
861 | address_item = g_malloc0(sizeof(*address_item)); | |
862 | address_item->value = g_malloc0(sizeof(*address_item->value)); | |
863 | p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr; | |
864 | if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) { | |
865 | snprintf(err_msg, sizeof(err_msg), | |
866 | "inet_ntop failed : %s", strerror(errno)); | |
867 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
868 | goto error; | |
869 | } | |
870 | ||
871 | address_item->value->ip_address = g_strdup(addr4); | |
872 | address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4; | |
873 | ||
874 | if (ifa->ifa_netmask) { | |
875 | /* Count the number of set bits in netmask. | |
876 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
877 | p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr; | |
878 | address_item->value->prefix = ctpop32(((uint32_t *) p)[0]); | |
879 | } | |
880 | } else if (ifa->ifa_addr && | |
881 | ifa->ifa_addr->sa_family == AF_INET6) { | |
882 | /* interface with IPv6 address */ | |
883 | address_item = g_malloc0(sizeof(*address_item)); | |
884 | address_item->value = g_malloc0(sizeof(*address_item->value)); | |
885 | p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr; | |
886 | if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) { | |
887 | snprintf(err_msg, sizeof(err_msg), | |
888 | "inet_ntop failed : %s", strerror(errno)); | |
889 | error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg); | |
890 | goto error; | |
891 | } | |
892 | ||
893 | address_item->value->ip_address = g_strdup(addr6); | |
894 | address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6; | |
895 | ||
896 | if (ifa->ifa_netmask) { | |
897 | /* Count the number of set bits in netmask. | |
898 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
899 | p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr; | |
900 | address_item->value->prefix = | |
901 | ctpop32(((uint32_t *) p)[0]) + | |
902 | ctpop32(((uint32_t *) p)[1]) + | |
903 | ctpop32(((uint32_t *) p)[2]) + | |
904 | ctpop32(((uint32_t *) p)[3]); | |
905 | } | |
906 | } | |
907 | ||
908 | if (!address_item) { | |
909 | continue; | |
910 | } | |
911 | ||
912 | address_list = &info->value->ip_addresses; | |
913 | ||
914 | while (*address_list && (*address_list)->next) { | |
915 | address_list = &(*address_list)->next; | |
916 | } | |
917 | ||
918 | if (!*address_list) { | |
919 | *address_list = address_item; | |
920 | } else { | |
921 | (*address_list)->next = address_item; | |
922 | } | |
923 | ||
924 | info->value->has_ip_addresses = true; | |
925 | ||
926 | ||
927 | } | |
928 | ||
929 | freeifaddrs(ifap); | |
930 | return head; | |
931 | ||
932 | error: | |
933 | freeifaddrs(ifap); | |
934 | qapi_free_GuestNetworkInterfaceList(head); | |
935 | return NULL; | |
936 | } | |
937 | ||
e72c3f2e MR |
938 | #else /* defined(__linux__) */ |
939 | ||
d35d4cb5 | 940 | void qmp_guest_suspend_disk(Error **err) |
e72c3f2e MR |
941 | { |
942 | error_set(err, QERR_UNSUPPORTED); | |
e72c3f2e MR |
943 | } |
944 | ||
d35d4cb5 | 945 | void qmp_guest_suspend_ram(Error **err) |
e72c3f2e MR |
946 | { |
947 | error_set(err, QERR_UNSUPPORTED); | |
e72c3f2e MR |
948 | } |
949 | ||
d35d4cb5 | 950 | void qmp_guest_suspend_hybrid(Error **err) |
e72c3f2e MR |
951 | { |
952 | error_set(err, QERR_UNSUPPORTED); | |
e72c3f2e MR |
953 | } |
954 | ||
d35d4cb5 | 955 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) |
e72c3f2e | 956 | { |
d35d4cb5 MR |
957 | error_set(errp, QERR_UNSUPPORTED); |
958 | return NULL; | |
e72c3f2e MR |
959 | } |
960 | ||
d35d4cb5 MR |
961 | #endif |
962 | ||
963 | #if !defined(CONFIG_FSFREEZE) | |
964 | ||
965 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err) | |
e72c3f2e MR |
966 | { |
967 | error_set(err, QERR_UNSUPPORTED); | |
d35d4cb5 MR |
968 | |
969 | return 0; | |
e72c3f2e MR |
970 | } |
971 | ||
d35d4cb5 | 972 | int64_t qmp_guest_fsfreeze_freeze(Error **err) |
e72c3f2e MR |
973 | { |
974 | error_set(err, QERR_UNSUPPORTED); | |
d35d4cb5 MR |
975 | |
976 | return 0; | |
e72c3f2e MR |
977 | } |
978 | ||
d35d4cb5 | 979 | int64_t qmp_guest_fsfreeze_thaw(Error **err) |
e72c3f2e | 980 | { |
d35d4cb5 MR |
981 | error_set(err, QERR_UNSUPPORTED); |
982 | ||
983 | return 0; | |
e72c3f2e | 984 | } |
eab5fd59 PB |
985 | #endif /* CONFIG_FSFREEZE */ |
986 | ||
987 | #if !defined(CONFIG_FSTRIM) | |
988 | void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err) | |
989 | { | |
990 | error_set(err, QERR_UNSUPPORTED); | |
eab5fd59 | 991 | } |
e72c3f2e MR |
992 | #endif |
993 | ||
e3d4d252 MR |
994 | /* register init/cleanup routines for stateful command groups */ |
995 | void ga_command_state_init(GAState *s, GACommandState *cs) | |
996 | { | |
7006b9cf | 997 | #if defined(CONFIG_FSFREEZE) |
f22d85e9 | 998 | ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup); |
7006b9cf | 999 | #endif |
e3d4d252 MR |
1000 | ga_command_state_add(cs, guest_file_init, NULL); |
1001 | } |