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1 | /* | |
2 | * QEMU Guest Agent POSIX-specific command implementations | |
3 | * | |
4 | * Copyright IBM Corp. 2011 | |
5 | * | |
6 | * Authors: | |
7 | * Michael Roth <mdroth@linux.vnet.ibm.com> | |
8 | * Michal Privoznik <mprivozn@redhat.com> | |
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 "qemu/osdep.h" | |
15 | #include <sys/ioctl.h> | |
16 | #include <sys/wait.h> | |
17 | #include <dirent.h> | |
18 | #include "qga/guest-agent-core.h" | |
19 | #include "qga-qmp-commands.h" | |
20 | #include "qapi/qmp/qerror.h" | |
21 | #include "qemu/queue.h" | |
22 | #include "qemu/host-utils.h" | |
23 | #include "qemu/sockets.h" | |
24 | #include "qemu/base64.h" | |
25 | #include "qemu/cutils.h" | |
26 | ||
27 | #ifndef CONFIG_HAS_ENVIRON | |
28 | #ifdef __APPLE__ | |
29 | #include <crt_externs.h> | |
30 | #define environ (*_NSGetEnviron()) | |
31 | #else | |
32 | extern char **environ; | |
33 | #endif | |
34 | #endif | |
35 | ||
36 | #if defined(__linux__) | |
37 | #include <mntent.h> | |
38 | #include <linux/fs.h> | |
39 | #include <ifaddrs.h> | |
40 | #include <arpa/inet.h> | |
41 | #include <sys/socket.h> | |
42 | #include <net/if.h> | |
43 | ||
44 | #ifdef FIFREEZE | |
45 | #define CONFIG_FSFREEZE | |
46 | #endif | |
47 | #ifdef FITRIM | |
48 | #define CONFIG_FSTRIM | |
49 | #endif | |
50 | #endif | |
51 | ||
52 | static void ga_wait_child(pid_t pid, int *status, Error **errp) | |
53 | { | |
54 | pid_t rpid; | |
55 | ||
56 | *status = 0; | |
57 | ||
58 | do { | |
59 | rpid = waitpid(pid, status, 0); | |
60 | } while (rpid == -1 && errno == EINTR); | |
61 | ||
62 | if (rpid == -1) { | |
63 | error_setg_errno(errp, errno, "failed to wait for child (pid: %d)", | |
64 | pid); | |
65 | return; | |
66 | } | |
67 | ||
68 | g_assert(rpid == pid); | |
69 | } | |
70 | ||
71 | void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp) | |
72 | { | |
73 | const char *shutdown_flag; | |
74 | Error *local_err = NULL; | |
75 | pid_t pid; | |
76 | int status; | |
77 | ||
78 | slog("guest-shutdown called, mode: %s", mode); | |
79 | if (!has_mode || strcmp(mode, "powerdown") == 0) { | |
80 | shutdown_flag = "-P"; | |
81 | } else if (strcmp(mode, "halt") == 0) { | |
82 | shutdown_flag = "-H"; | |
83 | } else if (strcmp(mode, "reboot") == 0) { | |
84 | shutdown_flag = "-r"; | |
85 | } else { | |
86 | error_setg(errp, | |
87 | "mode is invalid (valid values are: halt|powerdown|reboot"); | |
88 | return; | |
89 | } | |
90 | ||
91 | pid = fork(); | |
92 | if (pid == 0) { | |
93 | /* child, start the shutdown */ | |
94 | setsid(); | |
95 | reopen_fd_to_null(0); | |
96 | reopen_fd_to_null(1); | |
97 | reopen_fd_to_null(2); | |
98 | ||
99 | execle("/sbin/shutdown", "shutdown", "-h", shutdown_flag, "+0", | |
100 | "hypervisor initiated shutdown", (char*)NULL, environ); | |
101 | _exit(EXIT_FAILURE); | |
102 | } else if (pid < 0) { | |
103 | error_setg_errno(errp, errno, "failed to create child process"); | |
104 | return; | |
105 | } | |
106 | ||
107 | ga_wait_child(pid, &status, &local_err); | |
108 | if (local_err) { | |
109 | error_propagate(errp, local_err); | |
110 | return; | |
111 | } | |
112 | ||
113 | if (!WIFEXITED(status)) { | |
114 | error_setg(errp, "child process has terminated abnormally"); | |
115 | return; | |
116 | } | |
117 | ||
118 | if (WEXITSTATUS(status)) { | |
119 | error_setg(errp, "child process has failed to shutdown"); | |
120 | return; | |
121 | } | |
122 | ||
123 | /* succeeded */ | |
124 | } | |
125 | ||
126 | int64_t qmp_guest_get_time(Error **errp) | |
127 | { | |
128 | int ret; | |
129 | qemu_timeval tq; | |
130 | ||
131 | ret = qemu_gettimeofday(&tq); | |
132 | if (ret < 0) { | |
133 | error_setg_errno(errp, errno, "Failed to get time"); | |
134 | return -1; | |
135 | } | |
136 | ||
137 | return tq.tv_sec * 1000000000LL + tq.tv_usec * 1000; | |
138 | } | |
139 | ||
140 | void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp) | |
141 | { | |
142 | int ret; | |
143 | int status; | |
144 | pid_t pid; | |
145 | Error *local_err = NULL; | |
146 | struct timeval tv; | |
147 | ||
148 | /* If user has passed a time, validate and set it. */ | |
149 | if (has_time) { | |
150 | GDate date = { 0, }; | |
151 | ||
152 | /* year-2038 will overflow in case time_t is 32bit */ | |
153 | if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) { | |
154 | error_setg(errp, "Time %" PRId64 " is too large", time_ns); | |
155 | return; | |
156 | } | |
157 | ||
158 | tv.tv_sec = time_ns / 1000000000; | |
159 | tv.tv_usec = (time_ns % 1000000000) / 1000; | |
160 | g_date_set_time_t(&date, tv.tv_sec); | |
161 | if (date.year < 1970 || date.year >= 2070) { | |
162 | error_setg_errno(errp, errno, "Invalid time"); | |
163 | return; | |
164 | } | |
165 | ||
166 | ret = settimeofday(&tv, NULL); | |
167 | if (ret < 0) { | |
168 | error_setg_errno(errp, errno, "Failed to set time to guest"); | |
169 | return; | |
170 | } | |
171 | } | |
172 | ||
173 | /* Now, if user has passed a time to set and the system time is set, we | |
174 | * just need to synchronize the hardware clock. However, if no time was | |
175 | * passed, user is requesting the opposite: set the system time from the | |
176 | * hardware clock (RTC). */ | |
177 | pid = fork(); | |
178 | if (pid == 0) { | |
179 | setsid(); | |
180 | reopen_fd_to_null(0); | |
181 | reopen_fd_to_null(1); | |
182 | reopen_fd_to_null(2); | |
183 | ||
184 | /* Use '/sbin/hwclock -w' to set RTC from the system time, | |
185 | * or '/sbin/hwclock -s' to set the system time from RTC. */ | |
186 | execle("/sbin/hwclock", "hwclock", has_time ? "-w" : "-s", | |
187 | NULL, environ); | |
188 | _exit(EXIT_FAILURE); | |
189 | } else if (pid < 0) { | |
190 | error_setg_errno(errp, errno, "failed to create child process"); | |
191 | return; | |
192 | } | |
193 | ||
194 | ga_wait_child(pid, &status, &local_err); | |
195 | if (local_err) { | |
196 | error_propagate(errp, local_err); | |
197 | return; | |
198 | } | |
199 | ||
200 | if (!WIFEXITED(status)) { | |
201 | error_setg(errp, "child process has terminated abnormally"); | |
202 | return; | |
203 | } | |
204 | ||
205 | if (WEXITSTATUS(status)) { | |
206 | error_setg(errp, "hwclock failed to set hardware clock to system time"); | |
207 | return; | |
208 | } | |
209 | } | |
210 | ||
211 | typedef enum { | |
212 | RW_STATE_NEW, | |
213 | RW_STATE_READING, | |
214 | RW_STATE_WRITING, | |
215 | } RwState; | |
216 | ||
217 | typedef struct GuestFileHandle { | |
218 | uint64_t id; | |
219 | FILE *fh; | |
220 | RwState state; | |
221 | QTAILQ_ENTRY(GuestFileHandle) next; | |
222 | } GuestFileHandle; | |
223 | ||
224 | static struct { | |
225 | QTAILQ_HEAD(, GuestFileHandle) filehandles; | |
226 | } guest_file_state = { | |
227 | .filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles), | |
228 | }; | |
229 | ||
230 | static int64_t guest_file_handle_add(FILE *fh, Error **errp) | |
231 | { | |
232 | GuestFileHandle *gfh; | |
233 | int64_t handle; | |
234 | ||
235 | handle = ga_get_fd_handle(ga_state, errp); | |
236 | if (handle < 0) { | |
237 | return -1; | |
238 | } | |
239 | ||
240 | gfh = g_new0(GuestFileHandle, 1); | |
241 | gfh->id = handle; | |
242 | gfh->fh = fh; | |
243 | QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next); | |
244 | ||
245 | return handle; | |
246 | } | |
247 | ||
248 | static GuestFileHandle *guest_file_handle_find(int64_t id, Error **errp) | |
249 | { | |
250 | GuestFileHandle *gfh; | |
251 | ||
252 | QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next) | |
253 | { | |
254 | if (gfh->id == id) { | |
255 | return gfh; | |
256 | } | |
257 | } | |
258 | ||
259 | error_setg(errp, "handle '%" PRId64 "' has not been found", id); | |
260 | return NULL; | |
261 | } | |
262 | ||
263 | typedef const char * const ccpc; | |
264 | ||
265 | #ifndef O_BINARY | |
266 | #define O_BINARY 0 | |
267 | #endif | |
268 | ||
269 | /* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */ | |
270 | static const struct { | |
271 | ccpc *forms; | |
272 | int oflag_base; | |
273 | } guest_file_open_modes[] = { | |
274 | { (ccpc[]){ "r", NULL }, O_RDONLY }, | |
275 | { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY }, | |
276 | { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC }, | |
277 | { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY }, | |
278 | { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND }, | |
279 | { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY }, | |
280 | { (ccpc[]){ "r+", NULL }, O_RDWR }, | |
281 | { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY }, | |
282 | { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC }, | |
283 | { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY }, | |
284 | { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND }, | |
285 | { (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY } | |
286 | }; | |
287 | ||
288 | static int | |
289 | find_open_flag(const char *mode_str, Error **errp) | |
290 | { | |
291 | unsigned mode; | |
292 | ||
293 | for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) { | |
294 | ccpc *form; | |
295 | ||
296 | form = guest_file_open_modes[mode].forms; | |
297 | while (*form != NULL && strcmp(*form, mode_str) != 0) { | |
298 | ++form; | |
299 | } | |
300 | if (*form != NULL) { | |
301 | break; | |
302 | } | |
303 | } | |
304 | ||
305 | if (mode == ARRAY_SIZE(guest_file_open_modes)) { | |
306 | error_setg(errp, "invalid file open mode '%s'", mode_str); | |
307 | return -1; | |
308 | } | |
309 | return guest_file_open_modes[mode].oflag_base | O_NOCTTY | O_NONBLOCK; | |
310 | } | |
311 | ||
312 | #define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \ | |
313 | S_IRGRP | S_IWGRP | \ | |
314 | S_IROTH | S_IWOTH) | |
315 | ||
316 | static FILE * | |
317 | safe_open_or_create(const char *path, const char *mode, Error **errp) | |
318 | { | |
319 | Error *local_err = NULL; | |
320 | int oflag; | |
321 | ||
322 | oflag = find_open_flag(mode, &local_err); | |
323 | if (local_err == NULL) { | |
324 | int fd; | |
325 | ||
326 | /* If the caller wants / allows creation of a new file, we implement it | |
327 | * with a two step process: open() + (open() / fchmod()). | |
328 | * | |
329 | * First we insist on creating the file exclusively as a new file. If | |
330 | * that succeeds, we're free to set any file-mode bits on it. (The | |
331 | * motivation is that we want to set those file-mode bits independently | |
332 | * of the current umask.) | |
333 | * | |
334 | * If the exclusive creation fails because the file already exists | |
335 | * (EEXIST is not possible for any other reason), we just attempt to | |
336 | * open the file, but in this case we won't be allowed to change the | |
337 | * file-mode bits on the preexistent file. | |
338 | * | |
339 | * The pathname should never disappear between the two open()s in | |
340 | * practice. If it happens, then someone very likely tried to race us. | |
341 | * In this case just go ahead and report the ENOENT from the second | |
342 | * open() to the caller. | |
343 | * | |
344 | * If the caller wants to open a preexistent file, then the first | |
345 | * open() is decisive and its third argument is ignored, and the second | |
346 | * open() and the fchmod() are never called. | |
347 | */ | |
348 | fd = open(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0); | |
349 | if (fd == -1 && errno == EEXIST) { | |
350 | oflag &= ~(unsigned)O_CREAT; | |
351 | fd = open(path, oflag); | |
352 | } | |
353 | ||
354 | if (fd == -1) { | |
355 | error_setg_errno(&local_err, errno, "failed to open file '%s' " | |
356 | "(mode: '%s')", path, mode); | |
357 | } else { | |
358 | qemu_set_cloexec(fd); | |
359 | ||
360 | if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) { | |
361 | error_setg_errno(&local_err, errno, "failed to set permission " | |
362 | "0%03o on new file '%s' (mode: '%s')", | |
363 | (unsigned)DEFAULT_NEW_FILE_MODE, path, mode); | |
364 | } else { | |
365 | FILE *f; | |
366 | ||
367 | f = fdopen(fd, mode); | |
368 | if (f == NULL) { | |
369 | error_setg_errno(&local_err, errno, "failed to associate " | |
370 | "stdio stream with file descriptor %d, " | |
371 | "file '%s' (mode: '%s')", fd, path, mode); | |
372 | } else { | |
373 | return f; | |
374 | } | |
375 | } | |
376 | ||
377 | close(fd); | |
378 | if (oflag & O_CREAT) { | |
379 | unlink(path); | |
380 | } | |
381 | } | |
382 | } | |
383 | ||
384 | error_propagate(errp, local_err); | |
385 | return NULL; | |
386 | } | |
387 | ||
388 | int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, | |
389 | Error **errp) | |
390 | { | |
391 | FILE *fh; | |
392 | Error *local_err = NULL; | |
393 | int64_t handle; | |
394 | ||
395 | if (!has_mode) { | |
396 | mode = "r"; | |
397 | } | |
398 | slog("guest-file-open called, filepath: %s, mode: %s", path, mode); | |
399 | fh = safe_open_or_create(path, mode, &local_err); | |
400 | if (local_err != NULL) { | |
401 | error_propagate(errp, local_err); | |
402 | return -1; | |
403 | } | |
404 | ||
405 | /* set fd non-blocking to avoid common use cases (like reading from a | |
406 | * named pipe) from hanging the agent | |
407 | */ | |
408 | qemu_set_nonblock(fileno(fh)); | |
409 | ||
410 | handle = guest_file_handle_add(fh, errp); | |
411 | if (handle < 0) { | |
412 | fclose(fh); | |
413 | return -1; | |
414 | } | |
415 | ||
416 | slog("guest-file-open, handle: %" PRId64, handle); | |
417 | return handle; | |
418 | } | |
419 | ||
420 | void qmp_guest_file_close(int64_t handle, Error **errp) | |
421 | { | |
422 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); | |
423 | int ret; | |
424 | ||
425 | slog("guest-file-close called, handle: %" PRId64, handle); | |
426 | if (!gfh) { | |
427 | return; | |
428 | } | |
429 | ||
430 | ret = fclose(gfh->fh); | |
431 | if (ret == EOF) { | |
432 | error_setg_errno(errp, errno, "failed to close handle"); | |
433 | return; | |
434 | } | |
435 | ||
436 | QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next); | |
437 | g_free(gfh); | |
438 | } | |
439 | ||
440 | struct GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count, | |
441 | int64_t count, Error **errp) | |
442 | { | |
443 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); | |
444 | GuestFileRead *read_data = NULL; | |
445 | guchar *buf; | |
446 | FILE *fh; | |
447 | size_t read_count; | |
448 | ||
449 | if (!gfh) { | |
450 | return NULL; | |
451 | } | |
452 | ||
453 | if (!has_count) { | |
454 | count = QGA_READ_COUNT_DEFAULT; | |
455 | } else if (count < 0) { | |
456 | error_setg(errp, "value '%" PRId64 "' is invalid for argument count", | |
457 | count); | |
458 | return NULL; | |
459 | } | |
460 | ||
461 | fh = gfh->fh; | |
462 | ||
463 | /* explicitly flush when switching from writing to reading */ | |
464 | if (gfh->state == RW_STATE_WRITING) { | |
465 | int ret = fflush(fh); | |
466 | if (ret == EOF) { | |
467 | error_setg_errno(errp, errno, "failed to flush file"); | |
468 | return NULL; | |
469 | } | |
470 | gfh->state = RW_STATE_NEW; | |
471 | } | |
472 | ||
473 | buf = g_malloc0(count+1); | |
474 | read_count = fread(buf, 1, count, fh); | |
475 | if (ferror(fh)) { | |
476 | error_setg_errno(errp, errno, "failed to read file"); | |
477 | slog("guest-file-read failed, handle: %" PRId64, handle); | |
478 | } else { | |
479 | buf[read_count] = 0; | |
480 | read_data = g_new0(GuestFileRead, 1); | |
481 | read_data->count = read_count; | |
482 | read_data->eof = feof(fh); | |
483 | if (read_count) { | |
484 | read_data->buf_b64 = g_base64_encode(buf, read_count); | |
485 | } | |
486 | gfh->state = RW_STATE_READING; | |
487 | } | |
488 | g_free(buf); | |
489 | clearerr(fh); | |
490 | ||
491 | return read_data; | |
492 | } | |
493 | ||
494 | GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64, | |
495 | bool has_count, int64_t count, | |
496 | Error **errp) | |
497 | { | |
498 | GuestFileWrite *write_data = NULL; | |
499 | guchar *buf; | |
500 | gsize buf_len; | |
501 | int write_count; | |
502 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); | |
503 | FILE *fh; | |
504 | ||
505 | if (!gfh) { | |
506 | return NULL; | |
507 | } | |
508 | ||
509 | fh = gfh->fh; | |
510 | ||
511 | if (gfh->state == RW_STATE_READING) { | |
512 | int ret = fseek(fh, 0, SEEK_CUR); | |
513 | if (ret == -1) { | |
514 | error_setg_errno(errp, errno, "failed to seek file"); | |
515 | return NULL; | |
516 | } | |
517 | gfh->state = RW_STATE_NEW; | |
518 | } | |
519 | ||
520 | buf = qbase64_decode(buf_b64, -1, &buf_len, errp); | |
521 | if (!buf) { | |
522 | return NULL; | |
523 | } | |
524 | ||
525 | if (!has_count) { | |
526 | count = buf_len; | |
527 | } else if (count < 0 || count > buf_len) { | |
528 | error_setg(errp, "value '%" PRId64 "' is invalid for argument count", | |
529 | count); | |
530 | g_free(buf); | |
531 | return NULL; | |
532 | } | |
533 | ||
534 | write_count = fwrite(buf, 1, count, fh); | |
535 | if (ferror(fh)) { | |
536 | error_setg_errno(errp, errno, "failed to write to file"); | |
537 | slog("guest-file-write failed, handle: %" PRId64, handle); | |
538 | } else { | |
539 | write_data = g_new0(GuestFileWrite, 1); | |
540 | write_data->count = write_count; | |
541 | write_data->eof = feof(fh); | |
542 | gfh->state = RW_STATE_WRITING; | |
543 | } | |
544 | g_free(buf); | |
545 | clearerr(fh); | |
546 | ||
547 | return write_data; | |
548 | } | |
549 | ||
550 | struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset, | |
551 | GuestFileWhence *whence_code, | |
552 | Error **errp) | |
553 | { | |
554 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); | |
555 | GuestFileSeek *seek_data = NULL; | |
556 | FILE *fh; | |
557 | int ret; | |
558 | int whence; | |
559 | Error *err = NULL; | |
560 | ||
561 | if (!gfh) { | |
562 | return NULL; | |
563 | } | |
564 | ||
565 | /* We stupidly exposed 'whence':'int' in our qapi */ | |
566 | whence = ga_parse_whence(whence_code, &err); | |
567 | if (err) { | |
568 | error_propagate(errp, err); | |
569 | return NULL; | |
570 | } | |
571 | ||
572 | fh = gfh->fh; | |
573 | ret = fseek(fh, offset, whence); | |
574 | if (ret == -1) { | |
575 | error_setg_errno(errp, errno, "failed to seek file"); | |
576 | if (errno == ESPIPE) { | |
577 | /* file is non-seekable, stdio shouldn't be buffering anyways */ | |
578 | gfh->state = RW_STATE_NEW; | |
579 | } | |
580 | } else { | |
581 | seek_data = g_new0(GuestFileSeek, 1); | |
582 | seek_data->position = ftell(fh); | |
583 | seek_data->eof = feof(fh); | |
584 | gfh->state = RW_STATE_NEW; | |
585 | } | |
586 | clearerr(fh); | |
587 | ||
588 | return seek_data; | |
589 | } | |
590 | ||
591 | void qmp_guest_file_flush(int64_t handle, Error **errp) | |
592 | { | |
593 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); | |
594 | FILE *fh; | |
595 | int ret; | |
596 | ||
597 | if (!gfh) { | |
598 | return; | |
599 | } | |
600 | ||
601 | fh = gfh->fh; | |
602 | ret = fflush(fh); | |
603 | if (ret == EOF) { | |
604 | error_setg_errno(errp, errno, "failed to flush file"); | |
605 | } else { | |
606 | gfh->state = RW_STATE_NEW; | |
607 | } | |
608 | } | |
609 | ||
610 | /* linux-specific implementations. avoid this if at all possible. */ | |
611 | #if defined(__linux__) | |
612 | ||
613 | #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) | |
614 | typedef struct FsMount { | |
615 | char *dirname; | |
616 | char *devtype; | |
617 | unsigned int devmajor, devminor; | |
618 | QTAILQ_ENTRY(FsMount) next; | |
619 | } FsMount; | |
620 | ||
621 | typedef QTAILQ_HEAD(FsMountList, FsMount) FsMountList; | |
622 | ||
623 | static void free_fs_mount_list(FsMountList *mounts) | |
624 | { | |
625 | FsMount *mount, *temp; | |
626 | ||
627 | if (!mounts) { | |
628 | return; | |
629 | } | |
630 | ||
631 | QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) { | |
632 | QTAILQ_REMOVE(mounts, mount, next); | |
633 | g_free(mount->dirname); | |
634 | g_free(mount->devtype); | |
635 | g_free(mount); | |
636 | } | |
637 | } | |
638 | ||
639 | static int dev_major_minor(const char *devpath, | |
640 | unsigned int *devmajor, unsigned int *devminor) | |
641 | { | |
642 | struct stat st; | |
643 | ||
644 | *devmajor = 0; | |
645 | *devminor = 0; | |
646 | ||
647 | if (stat(devpath, &st) < 0) { | |
648 | slog("failed to stat device file '%s': %s", devpath, strerror(errno)); | |
649 | return -1; | |
650 | } | |
651 | if (S_ISDIR(st.st_mode)) { | |
652 | /* It is bind mount */ | |
653 | return -2; | |
654 | } | |
655 | if (S_ISBLK(st.st_mode)) { | |
656 | *devmajor = major(st.st_rdev); | |
657 | *devminor = minor(st.st_rdev); | |
658 | return 0; | |
659 | } | |
660 | return -1; | |
661 | } | |
662 | ||
663 | /* | |
664 | * Walk the mount table and build a list of local file systems | |
665 | */ | |
666 | static void build_fs_mount_list_from_mtab(FsMountList *mounts, Error **errp) | |
667 | { | |
668 | struct mntent *ment; | |
669 | FsMount *mount; | |
670 | char const *mtab = "/proc/self/mounts"; | |
671 | FILE *fp; | |
672 | unsigned int devmajor, devminor; | |
673 | ||
674 | fp = setmntent(mtab, "r"); | |
675 | if (!fp) { | |
676 | error_setg(errp, "failed to open mtab file: '%s'", mtab); | |
677 | return; | |
678 | } | |
679 | ||
680 | while ((ment = getmntent(fp))) { | |
681 | /* | |
682 | * An entry which device name doesn't start with a '/' is | |
683 | * either a dummy file system or a network file system. | |
684 | * Add special handling for smbfs and cifs as is done by | |
685 | * coreutils as well. | |
686 | */ | |
687 | if ((ment->mnt_fsname[0] != '/') || | |
688 | (strcmp(ment->mnt_type, "smbfs") == 0) || | |
689 | (strcmp(ment->mnt_type, "cifs") == 0)) { | |
690 | continue; | |
691 | } | |
692 | if (dev_major_minor(ment->mnt_fsname, &devmajor, &devminor) == -2) { | |
693 | /* Skip bind mounts */ | |
694 | continue; | |
695 | } | |
696 | ||
697 | mount = g_new0(FsMount, 1); | |
698 | mount->dirname = g_strdup(ment->mnt_dir); | |
699 | mount->devtype = g_strdup(ment->mnt_type); | |
700 | mount->devmajor = devmajor; | |
701 | mount->devminor = devminor; | |
702 | ||
703 | QTAILQ_INSERT_TAIL(mounts, mount, next); | |
704 | } | |
705 | ||
706 | endmntent(fp); | |
707 | } | |
708 | ||
709 | static void decode_mntname(char *name, int len) | |
710 | { | |
711 | int i, j = 0; | |
712 | for (i = 0; i <= len; i++) { | |
713 | if (name[i] != '\\') { | |
714 | name[j++] = name[i]; | |
715 | } else if (name[i + 1] == '\\') { | |
716 | name[j++] = '\\'; | |
717 | i++; | |
718 | } else if (name[i + 1] >= '0' && name[i + 1] <= '3' && | |
719 | name[i + 2] >= '0' && name[i + 2] <= '7' && | |
720 | name[i + 3] >= '0' && name[i + 3] <= '7') { | |
721 | name[j++] = (name[i + 1] - '0') * 64 + | |
722 | (name[i + 2] - '0') * 8 + | |
723 | (name[i + 3] - '0'); | |
724 | i += 3; | |
725 | } else { | |
726 | name[j++] = name[i]; | |
727 | } | |
728 | } | |
729 | } | |
730 | ||
731 | static void build_fs_mount_list(FsMountList *mounts, Error **errp) | |
732 | { | |
733 | FsMount *mount; | |
734 | char const *mountinfo = "/proc/self/mountinfo"; | |
735 | FILE *fp; | |
736 | char *line = NULL, *dash; | |
737 | size_t n; | |
738 | char check; | |
739 | unsigned int devmajor, devminor; | |
740 | int ret, dir_s, dir_e, type_s, type_e, dev_s, dev_e; | |
741 | ||
742 | fp = fopen(mountinfo, "r"); | |
743 | if (!fp) { | |
744 | build_fs_mount_list_from_mtab(mounts, errp); | |
745 | return; | |
746 | } | |
747 | ||
748 | while (getline(&line, &n, fp) != -1) { | |
749 | ret = sscanf(line, "%*u %*u %u:%u %*s %n%*s%n%c", | |
750 | &devmajor, &devminor, &dir_s, &dir_e, &check); | |
751 | if (ret < 3) { | |
752 | continue; | |
753 | } | |
754 | dash = strstr(line + dir_e, " - "); | |
755 | if (!dash) { | |
756 | continue; | |
757 | } | |
758 | ret = sscanf(dash, " - %n%*s%n %n%*s%n%c", | |
759 | &type_s, &type_e, &dev_s, &dev_e, &check); | |
760 | if (ret < 1) { | |
761 | continue; | |
762 | } | |
763 | line[dir_e] = 0; | |
764 | dash[type_e] = 0; | |
765 | dash[dev_e] = 0; | |
766 | decode_mntname(line + dir_s, dir_e - dir_s); | |
767 | decode_mntname(dash + dev_s, dev_e - dev_s); | |
768 | if (devmajor == 0) { | |
769 | /* btrfs reports major number = 0 */ | |
770 | if (strcmp("btrfs", dash + type_s) != 0 || | |
771 | dev_major_minor(dash + dev_s, &devmajor, &devminor) < 0) { | |
772 | continue; | |
773 | } | |
774 | } | |
775 | ||
776 | mount = g_new0(FsMount, 1); | |
777 | mount->dirname = g_strdup(line + dir_s); | |
778 | mount->devtype = g_strdup(dash + type_s); | |
779 | mount->devmajor = devmajor; | |
780 | mount->devminor = devminor; | |
781 | ||
782 | QTAILQ_INSERT_TAIL(mounts, mount, next); | |
783 | } | |
784 | free(line); | |
785 | ||
786 | fclose(fp); | |
787 | } | |
788 | #endif | |
789 | ||
790 | #if defined(CONFIG_FSFREEZE) | |
791 | ||
792 | static char *get_pci_driver(char const *syspath, int pathlen, Error **errp) | |
793 | { | |
794 | char *path; | |
795 | char *dpath; | |
796 | char *driver = NULL; | |
797 | char buf[PATH_MAX]; | |
798 | ssize_t len; | |
799 | ||
800 | path = g_strndup(syspath, pathlen); | |
801 | dpath = g_strdup_printf("%s/driver", path); | |
802 | len = readlink(dpath, buf, sizeof(buf) - 1); | |
803 | if (len != -1) { | |
804 | buf[len] = 0; | |
805 | driver = g_strdup(basename(buf)); | |
806 | } | |
807 | g_free(dpath); | |
808 | g_free(path); | |
809 | return driver; | |
810 | } | |
811 | ||
812 | static int compare_uint(const void *_a, const void *_b) | |
813 | { | |
814 | unsigned int a = *(unsigned int *)_a; | |
815 | unsigned int b = *(unsigned int *)_b; | |
816 | ||
817 | return a < b ? -1 : a > b ? 1 : 0; | |
818 | } | |
819 | ||
820 | /* Walk the specified sysfs and build a sorted list of host or ata numbers */ | |
821 | static int build_hosts(char const *syspath, char const *host, bool ata, | |
822 | unsigned int *hosts, int hosts_max, Error **errp) | |
823 | { | |
824 | char *path; | |
825 | DIR *dir; | |
826 | struct dirent *entry; | |
827 | int i = 0; | |
828 | ||
829 | path = g_strndup(syspath, host - syspath); | |
830 | dir = opendir(path); | |
831 | if (!dir) { | |
832 | error_setg_errno(errp, errno, "opendir(\"%s\")", path); | |
833 | g_free(path); | |
834 | return -1; | |
835 | } | |
836 | ||
837 | while (i < hosts_max) { | |
838 | entry = readdir(dir); | |
839 | if (!entry) { | |
840 | break; | |
841 | } | |
842 | if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) { | |
843 | ++i; | |
844 | } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) { | |
845 | ++i; | |
846 | } | |
847 | } | |
848 | ||
849 | qsort(hosts, i, sizeof(hosts[0]), compare_uint); | |
850 | ||
851 | g_free(path); | |
852 | closedir(dir); | |
853 | return i; | |
854 | } | |
855 | ||
856 | /* Store disk device info specified by @sysfs into @fs */ | |
857 | static void build_guest_fsinfo_for_real_device(char const *syspath, | |
858 | GuestFilesystemInfo *fs, | |
859 | Error **errp) | |
860 | { | |
861 | unsigned int pci[4], host, hosts[8], tgt[3]; | |
862 | int i, nhosts = 0, pcilen; | |
863 | GuestDiskAddress *disk; | |
864 | GuestPCIAddress *pciaddr; | |
865 | GuestDiskAddressList *list = NULL; | |
866 | bool has_ata = false, has_host = false, has_tgt = false; | |
867 | char *p, *q, *driver = NULL; | |
868 | ||
869 | p = strstr(syspath, "/devices/pci"); | |
870 | if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n", | |
871 | pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) { | |
872 | g_debug("only pci device is supported: sysfs path \"%s\"", syspath); | |
873 | return; | |
874 | } | |
875 | ||
876 | driver = get_pci_driver(syspath, (p + 12 + pcilen) - syspath, errp); | |
877 | if (!driver) { | |
878 | goto cleanup; | |
879 | } | |
880 | ||
881 | p = strstr(syspath, "/target"); | |
882 | if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", | |
883 | tgt, tgt + 1, tgt + 2) == 3) { | |
884 | has_tgt = true; | |
885 | } | |
886 | ||
887 | p = strstr(syspath, "/ata"); | |
888 | if (p) { | |
889 | q = p + 4; | |
890 | has_ata = true; | |
891 | } else { | |
892 | p = strstr(syspath, "/host"); | |
893 | q = p + 5; | |
894 | } | |
895 | if (p && sscanf(q, "%u", &host) == 1) { | |
896 | has_host = true; | |
897 | nhosts = build_hosts(syspath, p, has_ata, hosts, | |
898 | sizeof(hosts) / sizeof(hosts[0]), errp); | |
899 | if (nhosts < 0) { | |
900 | goto cleanup; | |
901 | } | |
902 | } | |
903 | ||
904 | pciaddr = g_malloc0(sizeof(*pciaddr)); | |
905 | pciaddr->domain = pci[0]; | |
906 | pciaddr->bus = pci[1]; | |
907 | pciaddr->slot = pci[2]; | |
908 | pciaddr->function = pci[3]; | |
909 | ||
910 | disk = g_malloc0(sizeof(*disk)); | |
911 | disk->pci_controller = pciaddr; | |
912 | ||
913 | list = g_malloc0(sizeof(*list)); | |
914 | list->value = disk; | |
915 | ||
916 | if (strcmp(driver, "ata_piix") == 0) { | |
917 | /* a host per ide bus, target*:0:<unit>:0 */ | |
918 | if (!has_host || !has_tgt) { | |
919 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); | |
920 | goto cleanup; | |
921 | } | |
922 | for (i = 0; i < nhosts; i++) { | |
923 | if (host == hosts[i]) { | |
924 | disk->bus_type = GUEST_DISK_BUS_TYPE_IDE; | |
925 | disk->bus = i; | |
926 | disk->unit = tgt[1]; | |
927 | break; | |
928 | } | |
929 | } | |
930 | if (i >= nhosts) { | |
931 | g_debug("no host for '%s' (driver '%s')", syspath, driver); | |
932 | goto cleanup; | |
933 | } | |
934 | } else if (strcmp(driver, "sym53c8xx") == 0) { | |
935 | /* scsi(LSI Logic): target*:0:<unit>:0 */ | |
936 | if (!has_tgt) { | |
937 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); | |
938 | goto cleanup; | |
939 | } | |
940 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; | |
941 | disk->unit = tgt[1]; | |
942 | } else if (strcmp(driver, "virtio-pci") == 0) { | |
943 | if (has_tgt) { | |
944 | /* virtio-scsi: target*:0:0:<unit> */ | |
945 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; | |
946 | disk->unit = tgt[2]; | |
947 | } else { | |
948 | /* virtio-blk: 1 disk per 1 device */ | |
949 | disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; | |
950 | } | |
951 | } else if (strcmp(driver, "ahci") == 0) { | |
952 | /* ahci: 1 host per 1 unit */ | |
953 | if (!has_host || !has_tgt) { | |
954 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); | |
955 | goto cleanup; | |
956 | } | |
957 | for (i = 0; i < nhosts; i++) { | |
958 | if (host == hosts[i]) { | |
959 | disk->unit = i; | |
960 | disk->bus_type = GUEST_DISK_BUS_TYPE_SATA; | |
961 | break; | |
962 | } | |
963 | } | |
964 | if (i >= nhosts) { | |
965 | g_debug("no host for '%s' (driver '%s')", syspath, driver); | |
966 | goto cleanup; | |
967 | } | |
968 | } else { | |
969 | g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath); | |
970 | goto cleanup; | |
971 | } | |
972 | ||
973 | list->next = fs->disk; | |
974 | fs->disk = list; | |
975 | g_free(driver); | |
976 | return; | |
977 | ||
978 | cleanup: | |
979 | if (list) { | |
980 | qapi_free_GuestDiskAddressList(list); | |
981 | } | |
982 | g_free(driver); | |
983 | } | |
984 | ||
985 | static void build_guest_fsinfo_for_device(char const *devpath, | |
986 | GuestFilesystemInfo *fs, | |
987 | Error **errp); | |
988 | ||
989 | /* Store a list of slave devices of virtual volume specified by @syspath into | |
990 | * @fs */ | |
991 | static void build_guest_fsinfo_for_virtual_device(char const *syspath, | |
992 | GuestFilesystemInfo *fs, | |
993 | Error **errp) | |
994 | { | |
995 | DIR *dir; | |
996 | char *dirpath; | |
997 | struct dirent *entry; | |
998 | ||
999 | dirpath = g_strdup_printf("%s/slaves", syspath); | |
1000 | dir = opendir(dirpath); | |
1001 | if (!dir) { | |
1002 | error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath); | |
1003 | g_free(dirpath); | |
1004 | return; | |
1005 | } | |
1006 | ||
1007 | for (;;) { | |
1008 | errno = 0; | |
1009 | entry = readdir(dir); | |
1010 | if (entry == NULL) { | |
1011 | if (errno) { | |
1012 | error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath); | |
1013 | } | |
1014 | break; | |
1015 | } | |
1016 | ||
1017 | if (entry->d_type == DT_LNK) { | |
1018 | char *path; | |
1019 | ||
1020 | g_debug(" slave device '%s'", entry->d_name); | |
1021 | path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name); | |
1022 | build_guest_fsinfo_for_device(path, fs, errp); | |
1023 | g_free(path); | |
1024 | ||
1025 | if (*errp) { | |
1026 | break; | |
1027 | } | |
1028 | } | |
1029 | } | |
1030 | ||
1031 | g_free(dirpath); | |
1032 | closedir(dir); | |
1033 | } | |
1034 | ||
1035 | /* Dispatch to functions for virtual/real device */ | |
1036 | static void build_guest_fsinfo_for_device(char const *devpath, | |
1037 | GuestFilesystemInfo *fs, | |
1038 | Error **errp) | |
1039 | { | |
1040 | char *syspath = realpath(devpath, NULL); | |
1041 | ||
1042 | if (!syspath) { | |
1043 | error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); | |
1044 | return; | |
1045 | } | |
1046 | ||
1047 | if (!fs->name) { | |
1048 | fs->name = g_strdup(basename(syspath)); | |
1049 | } | |
1050 | ||
1051 | g_debug(" parse sysfs path '%s'", syspath); | |
1052 | ||
1053 | if (strstr(syspath, "/devices/virtual/block/")) { | |
1054 | build_guest_fsinfo_for_virtual_device(syspath, fs, errp); | |
1055 | } else { | |
1056 | build_guest_fsinfo_for_real_device(syspath, fs, errp); | |
1057 | } | |
1058 | ||
1059 | free(syspath); | |
1060 | } | |
1061 | ||
1062 | /* Return a list of the disk device(s)' info which @mount lies on */ | |
1063 | static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount, | |
1064 | Error **errp) | |
1065 | { | |
1066 | GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs)); | |
1067 | char *devpath = g_strdup_printf("/sys/dev/block/%u:%u", | |
1068 | mount->devmajor, mount->devminor); | |
1069 | ||
1070 | fs->mountpoint = g_strdup(mount->dirname); | |
1071 | fs->type = g_strdup(mount->devtype); | |
1072 | build_guest_fsinfo_for_device(devpath, fs, errp); | |
1073 | ||
1074 | g_free(devpath); | |
1075 | return fs; | |
1076 | } | |
1077 | ||
1078 | GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) | |
1079 | { | |
1080 | FsMountList mounts; | |
1081 | struct FsMount *mount; | |
1082 | GuestFilesystemInfoList *new, *ret = NULL; | |
1083 | Error *local_err = NULL; | |
1084 | ||
1085 | QTAILQ_INIT(&mounts); | |
1086 | build_fs_mount_list(&mounts, &local_err); | |
1087 | if (local_err) { | |
1088 | error_propagate(errp, local_err); | |
1089 | return NULL; | |
1090 | } | |
1091 | ||
1092 | QTAILQ_FOREACH(mount, &mounts, next) { | |
1093 | g_debug("Building guest fsinfo for '%s'", mount->dirname); | |
1094 | ||
1095 | new = g_malloc0(sizeof(*ret)); | |
1096 | new->value = build_guest_fsinfo(mount, &local_err); | |
1097 | new->next = ret; | |
1098 | ret = new; | |
1099 | if (local_err) { | |
1100 | error_propagate(errp, local_err); | |
1101 | qapi_free_GuestFilesystemInfoList(ret); | |
1102 | ret = NULL; | |
1103 | break; | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | free_fs_mount_list(&mounts); | |
1108 | return ret; | |
1109 | } | |
1110 | ||
1111 | ||
1112 | typedef enum { | |
1113 | FSFREEZE_HOOK_THAW = 0, | |
1114 | FSFREEZE_HOOK_FREEZE, | |
1115 | } FsfreezeHookArg; | |
1116 | ||
1117 | static const char *fsfreeze_hook_arg_string[] = { | |
1118 | "thaw", | |
1119 | "freeze", | |
1120 | }; | |
1121 | ||
1122 | static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **errp) | |
1123 | { | |
1124 | int status; | |
1125 | pid_t pid; | |
1126 | const char *hook; | |
1127 | const char *arg_str = fsfreeze_hook_arg_string[arg]; | |
1128 | Error *local_err = NULL; | |
1129 | ||
1130 | hook = ga_fsfreeze_hook(ga_state); | |
1131 | if (!hook) { | |
1132 | return; | |
1133 | } | |
1134 | if (access(hook, X_OK) != 0) { | |
1135 | error_setg_errno(errp, errno, "can't access fsfreeze hook '%s'", hook); | |
1136 | return; | |
1137 | } | |
1138 | ||
1139 | slog("executing fsfreeze hook with arg '%s'", arg_str); | |
1140 | pid = fork(); | |
1141 | if (pid == 0) { | |
1142 | setsid(); | |
1143 | reopen_fd_to_null(0); | |
1144 | reopen_fd_to_null(1); | |
1145 | reopen_fd_to_null(2); | |
1146 | ||
1147 | execle(hook, hook, arg_str, NULL, environ); | |
1148 | _exit(EXIT_FAILURE); | |
1149 | } else if (pid < 0) { | |
1150 | error_setg_errno(errp, errno, "failed to create child process"); | |
1151 | return; | |
1152 | } | |
1153 | ||
1154 | ga_wait_child(pid, &status, &local_err); | |
1155 | if (local_err) { | |
1156 | error_propagate(errp, local_err); | |
1157 | return; | |
1158 | } | |
1159 | ||
1160 | if (!WIFEXITED(status)) { | |
1161 | error_setg(errp, "fsfreeze hook has terminated abnormally"); | |
1162 | return; | |
1163 | } | |
1164 | ||
1165 | status = WEXITSTATUS(status); | |
1166 | if (status) { | |
1167 | error_setg(errp, "fsfreeze hook has failed with status %d", status); | |
1168 | return; | |
1169 | } | |
1170 | } | |
1171 | ||
1172 | /* | |
1173 | * Return status of freeze/thaw | |
1174 | */ | |
1175 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp) | |
1176 | { | |
1177 | if (ga_is_frozen(ga_state)) { | |
1178 | return GUEST_FSFREEZE_STATUS_FROZEN; | |
1179 | } | |
1180 | ||
1181 | return GUEST_FSFREEZE_STATUS_THAWED; | |
1182 | } | |
1183 | ||
1184 | int64_t qmp_guest_fsfreeze_freeze(Error **errp) | |
1185 | { | |
1186 | return qmp_guest_fsfreeze_freeze_list(false, NULL, errp); | |
1187 | } | |
1188 | ||
1189 | /* | |
1190 | * Walk list of mounted file systems in the guest, and freeze the ones which | |
1191 | * are real local file systems. | |
1192 | */ | |
1193 | int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints, | |
1194 | strList *mountpoints, | |
1195 | Error **errp) | |
1196 | { | |
1197 | int ret = 0, i = 0; | |
1198 | strList *list; | |
1199 | FsMountList mounts; | |
1200 | struct FsMount *mount; | |
1201 | Error *local_err = NULL; | |
1202 | int fd; | |
1203 | ||
1204 | slog("guest-fsfreeze called"); | |
1205 | ||
1206 | execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err); | |
1207 | if (local_err) { | |
1208 | error_propagate(errp, local_err); | |
1209 | return -1; | |
1210 | } | |
1211 | ||
1212 | QTAILQ_INIT(&mounts); | |
1213 | build_fs_mount_list(&mounts, &local_err); | |
1214 | if (local_err) { | |
1215 | error_propagate(errp, local_err); | |
1216 | return -1; | |
1217 | } | |
1218 | ||
1219 | /* cannot risk guest agent blocking itself on a write in this state */ | |
1220 | ga_set_frozen(ga_state); | |
1221 | ||
1222 | QTAILQ_FOREACH_REVERSE(mount, &mounts, FsMountList, next) { | |
1223 | /* To issue fsfreeze in the reverse order of mounts, check if the | |
1224 | * mount is listed in the list here */ | |
1225 | if (has_mountpoints) { | |
1226 | for (list = mountpoints; list; list = list->next) { | |
1227 | if (strcmp(list->value, mount->dirname) == 0) { | |
1228 | break; | |
1229 | } | |
1230 | } | |
1231 | if (!list) { | |
1232 | continue; | |
1233 | } | |
1234 | } | |
1235 | ||
1236 | fd = qemu_open(mount->dirname, O_RDONLY); | |
1237 | if (fd == -1) { | |
1238 | error_setg_errno(errp, errno, "failed to open %s", mount->dirname); | |
1239 | goto error; | |
1240 | } | |
1241 | ||
1242 | /* we try to cull filesystems we know won't work in advance, but other | |
1243 | * filesystems may not implement fsfreeze for less obvious reasons. | |
1244 | * these will report EOPNOTSUPP. we simply ignore these when tallying | |
1245 | * the number of frozen filesystems. | |
1246 | * if a filesystem is mounted more than once (aka bind mount) a | |
1247 | * consecutive attempt to freeze an already frozen filesystem will | |
1248 | * return EBUSY. | |
1249 | * | |
1250 | * any other error means a failure to freeze a filesystem we | |
1251 | * expect to be freezable, so return an error in those cases | |
1252 | * and return system to thawed state. | |
1253 | */ | |
1254 | ret = ioctl(fd, FIFREEZE); | |
1255 | if (ret == -1) { | |
1256 | if (errno != EOPNOTSUPP && errno != EBUSY) { | |
1257 | error_setg_errno(errp, errno, "failed to freeze %s", | |
1258 | mount->dirname); | |
1259 | close(fd); | |
1260 | goto error; | |
1261 | } | |
1262 | } else { | |
1263 | i++; | |
1264 | } | |
1265 | close(fd); | |
1266 | } | |
1267 | ||
1268 | free_fs_mount_list(&mounts); | |
1269 | return i; | |
1270 | ||
1271 | error: | |
1272 | free_fs_mount_list(&mounts); | |
1273 | qmp_guest_fsfreeze_thaw(NULL); | |
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | /* | |
1278 | * Walk list of frozen file systems in the guest, and thaw them. | |
1279 | */ | |
1280 | int64_t qmp_guest_fsfreeze_thaw(Error **errp) | |
1281 | { | |
1282 | int ret; | |
1283 | FsMountList mounts; | |
1284 | FsMount *mount; | |
1285 | int fd, i = 0, logged; | |
1286 | Error *local_err = NULL; | |
1287 | ||
1288 | QTAILQ_INIT(&mounts); | |
1289 | build_fs_mount_list(&mounts, &local_err); | |
1290 | if (local_err) { | |
1291 | error_propagate(errp, local_err); | |
1292 | return 0; | |
1293 | } | |
1294 | ||
1295 | QTAILQ_FOREACH(mount, &mounts, next) { | |
1296 | logged = false; | |
1297 | fd = qemu_open(mount->dirname, O_RDONLY); | |
1298 | if (fd == -1) { | |
1299 | continue; | |
1300 | } | |
1301 | /* we have no way of knowing whether a filesystem was actually unfrozen | |
1302 | * as a result of a successful call to FITHAW, only that if an error | |
1303 | * was returned the filesystem was *not* unfrozen by that particular | |
1304 | * call. | |
1305 | * | |
1306 | * since multiple preceding FIFREEZEs require multiple calls to FITHAW | |
1307 | * to unfreeze, continuing issuing FITHAW until an error is returned, | |
1308 | * in which case either the filesystem is in an unfreezable state, or, | |
1309 | * more likely, it was thawed previously (and remains so afterward). | |
1310 | * | |
1311 | * also, since the most recent successful call is the one that did | |
1312 | * the actual unfreeze, we can use this to provide an accurate count | |
1313 | * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which | |
1314 | * may * be useful for determining whether a filesystem was unfrozen | |
1315 | * during the freeze/thaw phase by a process other than qemu-ga. | |
1316 | */ | |
1317 | do { | |
1318 | ret = ioctl(fd, FITHAW); | |
1319 | if (ret == 0 && !logged) { | |
1320 | i++; | |
1321 | logged = true; | |
1322 | } | |
1323 | } while (ret == 0); | |
1324 | close(fd); | |
1325 | } | |
1326 | ||
1327 | ga_unset_frozen(ga_state); | |
1328 | free_fs_mount_list(&mounts); | |
1329 | ||
1330 | execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, errp); | |
1331 | ||
1332 | return i; | |
1333 | } | |
1334 | ||
1335 | static void guest_fsfreeze_cleanup(void) | |
1336 | { | |
1337 | Error *err = NULL; | |
1338 | ||
1339 | if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) { | |
1340 | qmp_guest_fsfreeze_thaw(&err); | |
1341 | if (err) { | |
1342 | slog("failed to clean up frozen filesystems: %s", | |
1343 | error_get_pretty(err)); | |
1344 | error_free(err); | |
1345 | } | |
1346 | } | |
1347 | } | |
1348 | #endif /* CONFIG_FSFREEZE */ | |
1349 | ||
1350 | #if defined(CONFIG_FSTRIM) | |
1351 | /* | |
1352 | * Walk list of mounted file systems in the guest, and trim them. | |
1353 | */ | |
1354 | GuestFilesystemTrimResponse * | |
1355 | qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) | |
1356 | { | |
1357 | GuestFilesystemTrimResponse *response; | |
1358 | GuestFilesystemTrimResultList *list; | |
1359 | GuestFilesystemTrimResult *result; | |
1360 | int ret = 0; | |
1361 | FsMountList mounts; | |
1362 | struct FsMount *mount; | |
1363 | int fd; | |
1364 | Error *local_err = NULL; | |
1365 | struct fstrim_range r; | |
1366 | ||
1367 | slog("guest-fstrim called"); | |
1368 | ||
1369 | QTAILQ_INIT(&mounts); | |
1370 | build_fs_mount_list(&mounts, &local_err); | |
1371 | if (local_err) { | |
1372 | error_propagate(errp, local_err); | |
1373 | return NULL; | |
1374 | } | |
1375 | ||
1376 | response = g_malloc0(sizeof(*response)); | |
1377 | ||
1378 | QTAILQ_FOREACH(mount, &mounts, next) { | |
1379 | result = g_malloc0(sizeof(*result)); | |
1380 | result->path = g_strdup(mount->dirname); | |
1381 | ||
1382 | list = g_malloc0(sizeof(*list)); | |
1383 | list->value = result; | |
1384 | list->next = response->paths; | |
1385 | response->paths = list; | |
1386 | ||
1387 | fd = qemu_open(mount->dirname, O_RDONLY); | |
1388 | if (fd == -1) { | |
1389 | result->error = g_strdup_printf("failed to open: %s", | |
1390 | strerror(errno)); | |
1391 | result->has_error = true; | |
1392 | continue; | |
1393 | } | |
1394 | ||
1395 | /* We try to cull filesystems we know won't work in advance, but other | |
1396 | * filesystems may not implement fstrim for less obvious reasons. | |
1397 | * These will report EOPNOTSUPP; while in some other cases ENOTTY | |
1398 | * will be reported (e.g. CD-ROMs). | |
1399 | * Any other error means an unexpected error. | |
1400 | */ | |
1401 | r.start = 0; | |
1402 | r.len = -1; | |
1403 | r.minlen = has_minimum ? minimum : 0; | |
1404 | ret = ioctl(fd, FITRIM, &r); | |
1405 | if (ret == -1) { | |
1406 | result->has_error = true; | |
1407 | if (errno == ENOTTY || errno == EOPNOTSUPP) { | |
1408 | result->error = g_strdup("trim not supported"); | |
1409 | } else { | |
1410 | result->error = g_strdup_printf("failed to trim: %s", | |
1411 | strerror(errno)); | |
1412 | } | |
1413 | close(fd); | |
1414 | continue; | |
1415 | } | |
1416 | ||
1417 | result->has_minimum = true; | |
1418 | result->minimum = r.minlen; | |
1419 | result->has_trimmed = true; | |
1420 | result->trimmed = r.len; | |
1421 | close(fd); | |
1422 | } | |
1423 | ||
1424 | free_fs_mount_list(&mounts); | |
1425 | return response; | |
1426 | } | |
1427 | #endif /* CONFIG_FSTRIM */ | |
1428 | ||
1429 | ||
1430 | #define LINUX_SYS_STATE_FILE "/sys/power/state" | |
1431 | #define SUSPEND_SUPPORTED 0 | |
1432 | #define SUSPEND_NOT_SUPPORTED 1 | |
1433 | ||
1434 | static void bios_supports_mode(const char *pmutils_bin, const char *pmutils_arg, | |
1435 | const char *sysfile_str, Error **errp) | |
1436 | { | |
1437 | Error *local_err = NULL; | |
1438 | char *pmutils_path; | |
1439 | pid_t pid; | |
1440 | int status; | |
1441 | ||
1442 | pmutils_path = g_find_program_in_path(pmutils_bin); | |
1443 | ||
1444 | pid = fork(); | |
1445 | if (!pid) { | |
1446 | char buf[32]; /* hopefully big enough */ | |
1447 | ssize_t ret; | |
1448 | int fd; | |
1449 | ||
1450 | setsid(); | |
1451 | reopen_fd_to_null(0); | |
1452 | reopen_fd_to_null(1); | |
1453 | reopen_fd_to_null(2); | |
1454 | ||
1455 | if (pmutils_path) { | |
1456 | execle(pmutils_path, pmutils_bin, pmutils_arg, NULL, environ); | |
1457 | } | |
1458 | ||
1459 | /* | |
1460 | * If we get here either pm-utils is not installed or execle() has | |
1461 | * failed. Let's try the manual method if the caller wants it. | |
1462 | */ | |
1463 | ||
1464 | if (!sysfile_str) { | |
1465 | _exit(SUSPEND_NOT_SUPPORTED); | |
1466 | } | |
1467 | ||
1468 | fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); | |
1469 | if (fd < 0) { | |
1470 | _exit(SUSPEND_NOT_SUPPORTED); | |
1471 | } | |
1472 | ||
1473 | ret = read(fd, buf, sizeof(buf)-1); | |
1474 | if (ret <= 0) { | |
1475 | _exit(SUSPEND_NOT_SUPPORTED); | |
1476 | } | |
1477 | buf[ret] = '\0'; | |
1478 | ||
1479 | if (strstr(buf, sysfile_str)) { | |
1480 | _exit(SUSPEND_SUPPORTED); | |
1481 | } | |
1482 | ||
1483 | _exit(SUSPEND_NOT_SUPPORTED); | |
1484 | } else if (pid < 0) { | |
1485 | error_setg_errno(errp, errno, "failed to create child process"); | |
1486 | goto out; | |
1487 | } | |
1488 | ||
1489 | ga_wait_child(pid, &status, &local_err); | |
1490 | if (local_err) { | |
1491 | error_propagate(errp, local_err); | |
1492 | goto out; | |
1493 | } | |
1494 | ||
1495 | if (!WIFEXITED(status)) { | |
1496 | error_setg(errp, "child process has terminated abnormally"); | |
1497 | goto out; | |
1498 | } | |
1499 | ||
1500 | switch (WEXITSTATUS(status)) { | |
1501 | case SUSPEND_SUPPORTED: | |
1502 | goto out; | |
1503 | case SUSPEND_NOT_SUPPORTED: | |
1504 | error_setg(errp, | |
1505 | "the requested suspend mode is not supported by the guest"); | |
1506 | goto out; | |
1507 | default: | |
1508 | error_setg(errp, | |
1509 | "the helper program '%s' returned an unexpected exit status" | |
1510 | " code (%d)", pmutils_path, WEXITSTATUS(status)); | |
1511 | goto out; | |
1512 | } | |
1513 | ||
1514 | out: | |
1515 | g_free(pmutils_path); | |
1516 | } | |
1517 | ||
1518 | static void guest_suspend(const char *pmutils_bin, const char *sysfile_str, | |
1519 | Error **errp) | |
1520 | { | |
1521 | Error *local_err = NULL; | |
1522 | char *pmutils_path; | |
1523 | pid_t pid; | |
1524 | int status; | |
1525 | ||
1526 | pmutils_path = g_find_program_in_path(pmutils_bin); | |
1527 | ||
1528 | pid = fork(); | |
1529 | if (pid == 0) { | |
1530 | /* child */ | |
1531 | int fd; | |
1532 | ||
1533 | setsid(); | |
1534 | reopen_fd_to_null(0); | |
1535 | reopen_fd_to_null(1); | |
1536 | reopen_fd_to_null(2); | |
1537 | ||
1538 | if (pmutils_path) { | |
1539 | execle(pmutils_path, pmutils_bin, NULL, environ); | |
1540 | } | |
1541 | ||
1542 | /* | |
1543 | * If we get here either pm-utils is not installed or execle() has | |
1544 | * failed. Let's try the manual method if the caller wants it. | |
1545 | */ | |
1546 | ||
1547 | if (!sysfile_str) { | |
1548 | _exit(EXIT_FAILURE); | |
1549 | } | |
1550 | ||
1551 | fd = open(LINUX_SYS_STATE_FILE, O_WRONLY); | |
1552 | if (fd < 0) { | |
1553 | _exit(EXIT_FAILURE); | |
1554 | } | |
1555 | ||
1556 | if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) { | |
1557 | _exit(EXIT_FAILURE); | |
1558 | } | |
1559 | ||
1560 | _exit(EXIT_SUCCESS); | |
1561 | } else if (pid < 0) { | |
1562 | error_setg_errno(errp, errno, "failed to create child process"); | |
1563 | goto out; | |
1564 | } | |
1565 | ||
1566 | ga_wait_child(pid, &status, &local_err); | |
1567 | if (local_err) { | |
1568 | error_propagate(errp, local_err); | |
1569 | goto out; | |
1570 | } | |
1571 | ||
1572 | if (!WIFEXITED(status)) { | |
1573 | error_setg(errp, "child process has terminated abnormally"); | |
1574 | goto out; | |
1575 | } | |
1576 | ||
1577 | if (WEXITSTATUS(status)) { | |
1578 | error_setg(errp, "child process has failed to suspend"); | |
1579 | goto out; | |
1580 | } | |
1581 | ||
1582 | out: | |
1583 | g_free(pmutils_path); | |
1584 | } | |
1585 | ||
1586 | void qmp_guest_suspend_disk(Error **errp) | |
1587 | { | |
1588 | Error *local_err = NULL; | |
1589 | ||
1590 | bios_supports_mode("pm-is-supported", "--hibernate", "disk", &local_err); | |
1591 | if (local_err) { | |
1592 | error_propagate(errp, local_err); | |
1593 | return; | |
1594 | } | |
1595 | ||
1596 | guest_suspend("pm-hibernate", "disk", errp); | |
1597 | } | |
1598 | ||
1599 | void qmp_guest_suspend_ram(Error **errp) | |
1600 | { | |
1601 | Error *local_err = NULL; | |
1602 | ||
1603 | bios_supports_mode("pm-is-supported", "--suspend", "mem", &local_err); | |
1604 | if (local_err) { | |
1605 | error_propagate(errp, local_err); | |
1606 | return; | |
1607 | } | |
1608 | ||
1609 | guest_suspend("pm-suspend", "mem", errp); | |
1610 | } | |
1611 | ||
1612 | void qmp_guest_suspend_hybrid(Error **errp) | |
1613 | { | |
1614 | Error *local_err = NULL; | |
1615 | ||
1616 | bios_supports_mode("pm-is-supported", "--suspend-hybrid", NULL, | |
1617 | &local_err); | |
1618 | if (local_err) { | |
1619 | error_propagate(errp, local_err); | |
1620 | return; | |
1621 | } | |
1622 | ||
1623 | guest_suspend("pm-suspend-hybrid", NULL, errp); | |
1624 | } | |
1625 | ||
1626 | static GuestNetworkInterfaceList * | |
1627 | guest_find_interface(GuestNetworkInterfaceList *head, | |
1628 | const char *name) | |
1629 | { | |
1630 | for (; head; head = head->next) { | |
1631 | if (strcmp(head->value->name, name) == 0) { | |
1632 | break; | |
1633 | } | |
1634 | } | |
1635 | ||
1636 | return head; | |
1637 | } | |
1638 | ||
1639 | /* | |
1640 | * Build information about guest interfaces | |
1641 | */ | |
1642 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) | |
1643 | { | |
1644 | GuestNetworkInterfaceList *head = NULL, *cur_item = NULL; | |
1645 | struct ifaddrs *ifap, *ifa; | |
1646 | ||
1647 | if (getifaddrs(&ifap) < 0) { | |
1648 | error_setg_errno(errp, errno, "getifaddrs failed"); | |
1649 | goto error; | |
1650 | } | |
1651 | ||
1652 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { | |
1653 | GuestNetworkInterfaceList *info; | |
1654 | GuestIpAddressList **address_list = NULL, *address_item = NULL; | |
1655 | char addr4[INET_ADDRSTRLEN]; | |
1656 | char addr6[INET6_ADDRSTRLEN]; | |
1657 | int sock; | |
1658 | struct ifreq ifr; | |
1659 | unsigned char *mac_addr; | |
1660 | void *p; | |
1661 | ||
1662 | g_debug("Processing %s interface", ifa->ifa_name); | |
1663 | ||
1664 | info = guest_find_interface(head, ifa->ifa_name); | |
1665 | ||
1666 | if (!info) { | |
1667 | info = g_malloc0(sizeof(*info)); | |
1668 | info->value = g_malloc0(sizeof(*info->value)); | |
1669 | info->value->name = g_strdup(ifa->ifa_name); | |
1670 | ||
1671 | if (!cur_item) { | |
1672 | head = cur_item = info; | |
1673 | } else { | |
1674 | cur_item->next = info; | |
1675 | cur_item = info; | |
1676 | } | |
1677 | } | |
1678 | ||
1679 | if (!info->value->has_hardware_address && | |
1680 | ifa->ifa_flags & SIOCGIFHWADDR) { | |
1681 | /* we haven't obtained HW address yet */ | |
1682 | sock = socket(PF_INET, SOCK_STREAM, 0); | |
1683 | if (sock == -1) { | |
1684 | error_setg_errno(errp, errno, "failed to create socket"); | |
1685 | goto error; | |
1686 | } | |
1687 | ||
1688 | memset(&ifr, 0, sizeof(ifr)); | |
1689 | pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->value->name); | |
1690 | if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) { | |
1691 | error_setg_errno(errp, errno, | |
1692 | "failed to get MAC address of %s", | |
1693 | ifa->ifa_name); | |
1694 | close(sock); | |
1695 | goto error; | |
1696 | } | |
1697 | ||
1698 | close(sock); | |
1699 | mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data; | |
1700 | ||
1701 | info->value->hardware_address = | |
1702 | g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x", | |
1703 | (int) mac_addr[0], (int) mac_addr[1], | |
1704 | (int) mac_addr[2], (int) mac_addr[3], | |
1705 | (int) mac_addr[4], (int) mac_addr[5]); | |
1706 | ||
1707 | info->value->has_hardware_address = true; | |
1708 | } | |
1709 | ||
1710 | if (ifa->ifa_addr && | |
1711 | ifa->ifa_addr->sa_family == AF_INET) { | |
1712 | /* interface with IPv4 address */ | |
1713 | p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr; | |
1714 | if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) { | |
1715 | error_setg_errno(errp, errno, "inet_ntop failed"); | |
1716 | goto error; | |
1717 | } | |
1718 | ||
1719 | address_item = g_malloc0(sizeof(*address_item)); | |
1720 | address_item->value = g_malloc0(sizeof(*address_item->value)); | |
1721 | address_item->value->ip_address = g_strdup(addr4); | |
1722 | address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4; | |
1723 | ||
1724 | if (ifa->ifa_netmask) { | |
1725 | /* Count the number of set bits in netmask. | |
1726 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
1727 | p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr; | |
1728 | address_item->value->prefix = ctpop32(((uint32_t *) p)[0]); | |
1729 | } | |
1730 | } else if (ifa->ifa_addr && | |
1731 | ifa->ifa_addr->sa_family == AF_INET6) { | |
1732 | /* interface with IPv6 address */ | |
1733 | p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr; | |
1734 | if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) { | |
1735 | error_setg_errno(errp, errno, "inet_ntop failed"); | |
1736 | goto error; | |
1737 | } | |
1738 | ||
1739 | address_item = g_malloc0(sizeof(*address_item)); | |
1740 | address_item->value = g_malloc0(sizeof(*address_item->value)); | |
1741 | address_item->value->ip_address = g_strdup(addr6); | |
1742 | address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6; | |
1743 | ||
1744 | if (ifa->ifa_netmask) { | |
1745 | /* Count the number of set bits in netmask. | |
1746 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
1747 | p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr; | |
1748 | address_item->value->prefix = | |
1749 | ctpop32(((uint32_t *) p)[0]) + | |
1750 | ctpop32(((uint32_t *) p)[1]) + | |
1751 | ctpop32(((uint32_t *) p)[2]) + | |
1752 | ctpop32(((uint32_t *) p)[3]); | |
1753 | } | |
1754 | } | |
1755 | ||
1756 | if (!address_item) { | |
1757 | continue; | |
1758 | } | |
1759 | ||
1760 | address_list = &info->value->ip_addresses; | |
1761 | ||
1762 | while (*address_list && (*address_list)->next) { | |
1763 | address_list = &(*address_list)->next; | |
1764 | } | |
1765 | ||
1766 | if (!*address_list) { | |
1767 | *address_list = address_item; | |
1768 | } else { | |
1769 | (*address_list)->next = address_item; | |
1770 | } | |
1771 | ||
1772 | info->value->has_ip_addresses = true; | |
1773 | ||
1774 | ||
1775 | } | |
1776 | ||
1777 | freeifaddrs(ifap); | |
1778 | return head; | |
1779 | ||
1780 | error: | |
1781 | freeifaddrs(ifap); | |
1782 | qapi_free_GuestNetworkInterfaceList(head); | |
1783 | return NULL; | |
1784 | } | |
1785 | ||
1786 | #define SYSCONF_EXACT(name, errp) sysconf_exact((name), #name, (errp)) | |
1787 | ||
1788 | static long sysconf_exact(int name, const char *name_str, Error **errp) | |
1789 | { | |
1790 | long ret; | |
1791 | ||
1792 | errno = 0; | |
1793 | ret = sysconf(name); | |
1794 | if (ret == -1) { | |
1795 | if (errno == 0) { | |
1796 | error_setg(errp, "sysconf(%s): value indefinite", name_str); | |
1797 | } else { | |
1798 | error_setg_errno(errp, errno, "sysconf(%s)", name_str); | |
1799 | } | |
1800 | } | |
1801 | return ret; | |
1802 | } | |
1803 | ||
1804 | /* Transfer online/offline status between @vcpu and the guest system. | |
1805 | * | |
1806 | * On input either @errp or *@errp must be NULL. | |
1807 | * | |
1808 | * In system-to-@vcpu direction, the following @vcpu fields are accessed: | |
1809 | * - R: vcpu->logical_id | |
1810 | * - W: vcpu->online | |
1811 | * - W: vcpu->can_offline | |
1812 | * | |
1813 | * In @vcpu-to-system direction, the following @vcpu fields are accessed: | |
1814 | * - R: vcpu->logical_id | |
1815 | * - R: vcpu->online | |
1816 | * | |
1817 | * Written members remain unmodified on error. | |
1818 | */ | |
1819 | static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu, | |
1820 | Error **errp) | |
1821 | { | |
1822 | char *dirpath; | |
1823 | int dirfd; | |
1824 | ||
1825 | dirpath = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/", | |
1826 | vcpu->logical_id); | |
1827 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); | |
1828 | if (dirfd == -1) { | |
1829 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); | |
1830 | } else { | |
1831 | static const char fn[] = "online"; | |
1832 | int fd; | |
1833 | int res; | |
1834 | ||
1835 | fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR); | |
1836 | if (fd == -1) { | |
1837 | if (errno != ENOENT) { | |
1838 | error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn); | |
1839 | } else if (sys2vcpu) { | |
1840 | vcpu->online = true; | |
1841 | vcpu->can_offline = false; | |
1842 | } else if (!vcpu->online) { | |
1843 | error_setg(errp, "logical processor #%" PRId64 " can't be " | |
1844 | "offlined", vcpu->logical_id); | |
1845 | } /* otherwise pretend successful re-onlining */ | |
1846 | } else { | |
1847 | unsigned char status; | |
1848 | ||
1849 | res = pread(fd, &status, 1, 0); | |
1850 | if (res == -1) { | |
1851 | error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn); | |
1852 | } else if (res == 0) { | |
1853 | error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath, | |
1854 | fn); | |
1855 | } else if (sys2vcpu) { | |
1856 | vcpu->online = (status != '0'); | |
1857 | vcpu->can_offline = true; | |
1858 | } else if (vcpu->online != (status != '0')) { | |
1859 | status = '0' + vcpu->online; | |
1860 | if (pwrite(fd, &status, 1, 0) == -1) { | |
1861 | error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath, | |
1862 | fn); | |
1863 | } | |
1864 | } /* otherwise pretend successful re-(on|off)-lining */ | |
1865 | ||
1866 | res = close(fd); | |
1867 | g_assert(res == 0); | |
1868 | } | |
1869 | ||
1870 | res = close(dirfd); | |
1871 | g_assert(res == 0); | |
1872 | } | |
1873 | ||
1874 | g_free(dirpath); | |
1875 | } | |
1876 | ||
1877 | GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) | |
1878 | { | |
1879 | int64_t current; | |
1880 | GuestLogicalProcessorList *head, **link; | |
1881 | long sc_max; | |
1882 | Error *local_err = NULL; | |
1883 | ||
1884 | current = 0; | |
1885 | head = NULL; | |
1886 | link = &head; | |
1887 | sc_max = SYSCONF_EXACT(_SC_NPROCESSORS_CONF, &local_err); | |
1888 | ||
1889 | while (local_err == NULL && current < sc_max) { | |
1890 | GuestLogicalProcessor *vcpu; | |
1891 | GuestLogicalProcessorList *entry; | |
1892 | ||
1893 | vcpu = g_malloc0(sizeof *vcpu); | |
1894 | vcpu->logical_id = current++; | |
1895 | vcpu->has_can_offline = true; /* lolspeak ftw */ | |
1896 | transfer_vcpu(vcpu, true, &local_err); | |
1897 | ||
1898 | entry = g_malloc0(sizeof *entry); | |
1899 | entry->value = vcpu; | |
1900 | ||
1901 | *link = entry; | |
1902 | link = &entry->next; | |
1903 | } | |
1904 | ||
1905 | if (local_err == NULL) { | |
1906 | /* there's no guest with zero VCPUs */ | |
1907 | g_assert(head != NULL); | |
1908 | return head; | |
1909 | } | |
1910 | ||
1911 | qapi_free_GuestLogicalProcessorList(head); | |
1912 | error_propagate(errp, local_err); | |
1913 | return NULL; | |
1914 | } | |
1915 | ||
1916 | int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) | |
1917 | { | |
1918 | int64_t processed; | |
1919 | Error *local_err = NULL; | |
1920 | ||
1921 | processed = 0; | |
1922 | while (vcpus != NULL) { | |
1923 | transfer_vcpu(vcpus->value, false, &local_err); | |
1924 | if (local_err != NULL) { | |
1925 | break; | |
1926 | } | |
1927 | ++processed; | |
1928 | vcpus = vcpus->next; | |
1929 | } | |
1930 | ||
1931 | if (local_err != NULL) { | |
1932 | if (processed == 0) { | |
1933 | error_propagate(errp, local_err); | |
1934 | } else { | |
1935 | error_free(local_err); | |
1936 | } | |
1937 | } | |
1938 | ||
1939 | return processed; | |
1940 | } | |
1941 | ||
1942 | void qmp_guest_set_user_password(const char *username, | |
1943 | const char *password, | |
1944 | bool crypted, | |
1945 | Error **errp) | |
1946 | { | |
1947 | Error *local_err = NULL; | |
1948 | char *passwd_path = NULL; | |
1949 | pid_t pid; | |
1950 | int status; | |
1951 | int datafd[2] = { -1, -1 }; | |
1952 | char *rawpasswddata = NULL; | |
1953 | size_t rawpasswdlen; | |
1954 | char *chpasswddata = NULL; | |
1955 | size_t chpasswdlen; | |
1956 | ||
1957 | rawpasswddata = (char *)qbase64_decode(password, -1, &rawpasswdlen, errp); | |
1958 | if (!rawpasswddata) { | |
1959 | return; | |
1960 | } | |
1961 | rawpasswddata = g_renew(char, rawpasswddata, rawpasswdlen + 1); | |
1962 | rawpasswddata[rawpasswdlen] = '\0'; | |
1963 | ||
1964 | if (strchr(rawpasswddata, '\n')) { | |
1965 | error_setg(errp, "forbidden characters in raw password"); | |
1966 | goto out; | |
1967 | } | |
1968 | ||
1969 | if (strchr(username, '\n') || | |
1970 | strchr(username, ':')) { | |
1971 | error_setg(errp, "forbidden characters in username"); | |
1972 | goto out; | |
1973 | } | |
1974 | ||
1975 | chpasswddata = g_strdup_printf("%s:%s\n", username, rawpasswddata); | |
1976 | chpasswdlen = strlen(chpasswddata); | |
1977 | ||
1978 | passwd_path = g_find_program_in_path("chpasswd"); | |
1979 | ||
1980 | if (!passwd_path) { | |
1981 | error_setg(errp, "cannot find 'passwd' program in PATH"); | |
1982 | goto out; | |
1983 | } | |
1984 | ||
1985 | if (pipe(datafd) < 0) { | |
1986 | error_setg(errp, "cannot create pipe FDs"); | |
1987 | goto out; | |
1988 | } | |
1989 | ||
1990 | pid = fork(); | |
1991 | if (pid == 0) { | |
1992 | close(datafd[1]); | |
1993 | /* child */ | |
1994 | setsid(); | |
1995 | dup2(datafd[0], 0); | |
1996 | reopen_fd_to_null(1); | |
1997 | reopen_fd_to_null(2); | |
1998 | ||
1999 | if (crypted) { | |
2000 | execle(passwd_path, "chpasswd", "-e", NULL, environ); | |
2001 | } else { | |
2002 | execle(passwd_path, "chpasswd", NULL, environ); | |
2003 | } | |
2004 | _exit(EXIT_FAILURE); | |
2005 | } else if (pid < 0) { | |
2006 | error_setg_errno(errp, errno, "failed to create child process"); | |
2007 | goto out; | |
2008 | } | |
2009 | close(datafd[0]); | |
2010 | datafd[0] = -1; | |
2011 | ||
2012 | if (qemu_write_full(datafd[1], chpasswddata, chpasswdlen) != chpasswdlen) { | |
2013 | error_setg_errno(errp, errno, "cannot write new account password"); | |
2014 | goto out; | |
2015 | } | |
2016 | close(datafd[1]); | |
2017 | datafd[1] = -1; | |
2018 | ||
2019 | ga_wait_child(pid, &status, &local_err); | |
2020 | if (local_err) { | |
2021 | error_propagate(errp, local_err); | |
2022 | goto out; | |
2023 | } | |
2024 | ||
2025 | if (!WIFEXITED(status)) { | |
2026 | error_setg(errp, "child process has terminated abnormally"); | |
2027 | goto out; | |
2028 | } | |
2029 | ||
2030 | if (WEXITSTATUS(status)) { | |
2031 | error_setg(errp, "child process has failed to set user password"); | |
2032 | goto out; | |
2033 | } | |
2034 | ||
2035 | out: | |
2036 | g_free(chpasswddata); | |
2037 | g_free(rawpasswddata); | |
2038 | g_free(passwd_path); | |
2039 | if (datafd[0] != -1) { | |
2040 | close(datafd[0]); | |
2041 | } | |
2042 | if (datafd[1] != -1) { | |
2043 | close(datafd[1]); | |
2044 | } | |
2045 | } | |
2046 | ||
2047 | static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf, | |
2048 | int size, Error **errp) | |
2049 | { | |
2050 | int fd; | |
2051 | int res; | |
2052 | ||
2053 | errno = 0; | |
2054 | fd = openat(dirfd, pathname, O_RDONLY); | |
2055 | if (fd == -1) { | |
2056 | error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); | |
2057 | return; | |
2058 | } | |
2059 | ||
2060 | res = pread(fd, buf, size, 0); | |
2061 | if (res == -1) { | |
2062 | error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname); | |
2063 | } else if (res == 0) { | |
2064 | error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname); | |
2065 | } | |
2066 | close(fd); | |
2067 | } | |
2068 | ||
2069 | static void ga_write_sysfs_file(int dirfd, const char *pathname, | |
2070 | const char *buf, int size, Error **errp) | |
2071 | { | |
2072 | int fd; | |
2073 | ||
2074 | errno = 0; | |
2075 | fd = openat(dirfd, pathname, O_WRONLY); | |
2076 | if (fd == -1) { | |
2077 | error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); | |
2078 | return; | |
2079 | } | |
2080 | ||
2081 | if (pwrite(fd, buf, size, 0) == -1) { | |
2082 | error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname); | |
2083 | } | |
2084 | ||
2085 | close(fd); | |
2086 | } | |
2087 | ||
2088 | /* Transfer online/offline status between @mem_blk and the guest system. | |
2089 | * | |
2090 | * On input either @errp or *@errp must be NULL. | |
2091 | * | |
2092 | * In system-to-@mem_blk direction, the following @mem_blk fields are accessed: | |
2093 | * - R: mem_blk->phys_index | |
2094 | * - W: mem_blk->online | |
2095 | * - W: mem_blk->can_offline | |
2096 | * | |
2097 | * In @mem_blk-to-system direction, the following @mem_blk fields are accessed: | |
2098 | * - R: mem_blk->phys_index | |
2099 | * - R: mem_blk->online | |
2100 | *- R: mem_blk->can_offline | |
2101 | * Written members remain unmodified on error. | |
2102 | */ | |
2103 | static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk, | |
2104 | GuestMemoryBlockResponse *result, | |
2105 | Error **errp) | |
2106 | { | |
2107 | char *dirpath; | |
2108 | int dirfd; | |
2109 | char *status; | |
2110 | Error *local_err = NULL; | |
2111 | ||
2112 | if (!sys2memblk) { | |
2113 | DIR *dp; | |
2114 | ||
2115 | if (!result) { | |
2116 | error_setg(errp, "Internal error, 'result' should not be NULL"); | |
2117 | return; | |
2118 | } | |
2119 | errno = 0; | |
2120 | dp = opendir("/sys/devices/system/memory/"); | |
2121 | /* if there is no 'memory' directory in sysfs, | |
2122 | * we think this VM does not support online/offline memory block, | |
2123 | * any other solution? | |
2124 | */ | |
2125 | if (!dp && errno == ENOENT) { | |
2126 | result->response = | |
2127 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; | |
2128 | goto out1; | |
2129 | } | |
2130 | closedir(dp); | |
2131 | } | |
2132 | ||
2133 | dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/", | |
2134 | mem_blk->phys_index); | |
2135 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); | |
2136 | if (dirfd == -1) { | |
2137 | if (sys2memblk) { | |
2138 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); | |
2139 | } else { | |
2140 | if (errno == ENOENT) { | |
2141 | result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND; | |
2142 | } else { | |
2143 | result->response = | |
2144 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; | |
2145 | } | |
2146 | } | |
2147 | g_free(dirpath); | |
2148 | goto out1; | |
2149 | } | |
2150 | g_free(dirpath); | |
2151 | ||
2152 | status = g_malloc0(10); | |
2153 | ga_read_sysfs_file(dirfd, "state", status, 10, &local_err); | |
2154 | if (local_err) { | |
2155 | /* treat with sysfs file that not exist in old kernel */ | |
2156 | if (errno == ENOENT) { | |
2157 | error_free(local_err); | |
2158 | if (sys2memblk) { | |
2159 | mem_blk->online = true; | |
2160 | mem_blk->can_offline = false; | |
2161 | } else if (!mem_blk->online) { | |
2162 | result->response = | |
2163 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; | |
2164 | } | |
2165 | } else { | |
2166 | if (sys2memblk) { | |
2167 | error_propagate(errp, local_err); | |
2168 | } else { | |
2169 | result->response = | |
2170 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; | |
2171 | } | |
2172 | } | |
2173 | goto out2; | |
2174 | } | |
2175 | ||
2176 | if (sys2memblk) { | |
2177 | char removable = '0'; | |
2178 | ||
2179 | mem_blk->online = (strncmp(status, "online", 6) == 0); | |
2180 | ||
2181 | ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err); | |
2182 | if (local_err) { | |
2183 | /* if no 'removable' file, it doesn't support offline mem blk */ | |
2184 | if (errno == ENOENT) { | |
2185 | error_free(local_err); | |
2186 | mem_blk->can_offline = false; | |
2187 | } else { | |
2188 | error_propagate(errp, local_err); | |
2189 | } | |
2190 | } else { | |
2191 | mem_blk->can_offline = (removable != '0'); | |
2192 | } | |
2193 | } else { | |
2194 | if (mem_blk->online != (strncmp(status, "online", 6) == 0)) { | |
2195 | char *new_state = mem_blk->online ? g_strdup("online") : | |
2196 | g_strdup("offline"); | |
2197 | ||
2198 | ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state), | |
2199 | &local_err); | |
2200 | g_free(new_state); | |
2201 | if (local_err) { | |
2202 | error_free(local_err); | |
2203 | result->response = | |
2204 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; | |
2205 | goto out2; | |
2206 | } | |
2207 | ||
2208 | result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS; | |
2209 | result->has_error_code = false; | |
2210 | } /* otherwise pretend successful re-(on|off)-lining */ | |
2211 | } | |
2212 | g_free(status); | |
2213 | close(dirfd); | |
2214 | return; | |
2215 | ||
2216 | out2: | |
2217 | g_free(status); | |
2218 | close(dirfd); | |
2219 | out1: | |
2220 | if (!sys2memblk) { | |
2221 | result->has_error_code = true; | |
2222 | result->error_code = errno; | |
2223 | } | |
2224 | } | |
2225 | ||
2226 | GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) | |
2227 | { | |
2228 | GuestMemoryBlockList *head, **link; | |
2229 | Error *local_err = NULL; | |
2230 | struct dirent *de; | |
2231 | DIR *dp; | |
2232 | ||
2233 | head = NULL; | |
2234 | link = &head; | |
2235 | ||
2236 | dp = opendir("/sys/devices/system/memory/"); | |
2237 | if (!dp) { | |
2238 | /* it's ok if this happens to be a system that doesn't expose | |
2239 | * memory blocks via sysfs, but otherwise we should report | |
2240 | * an error | |
2241 | */ | |
2242 | if (errno != ENOENT) { | |
2243 | error_setg_errno(errp, errno, "Can't open directory" | |
2244 | "\"/sys/devices/system/memory/\""); | |
2245 | } | |
2246 | return NULL; | |
2247 | } | |
2248 | ||
2249 | /* Note: the phys_index of memory block may be discontinuous, | |
2250 | * this is because a memblk is the unit of the Sparse Memory design, which | |
2251 | * allows discontinuous memory ranges (ex. NUMA), so here we should | |
2252 | * traverse the memory block directory. | |
2253 | */ | |
2254 | while ((de = readdir(dp)) != NULL) { | |
2255 | GuestMemoryBlock *mem_blk; | |
2256 | GuestMemoryBlockList *entry; | |
2257 | ||
2258 | if ((strncmp(de->d_name, "memory", 6) != 0) || | |
2259 | !(de->d_type & DT_DIR)) { | |
2260 | continue; | |
2261 | } | |
2262 | ||
2263 | mem_blk = g_malloc0(sizeof *mem_blk); | |
2264 | /* The d_name is "memoryXXX", phys_index is block id, same as XXX */ | |
2265 | mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10); | |
2266 | mem_blk->has_can_offline = true; /* lolspeak ftw */ | |
2267 | transfer_memory_block(mem_blk, true, NULL, &local_err); | |
2268 | ||
2269 | entry = g_malloc0(sizeof *entry); | |
2270 | entry->value = mem_blk; | |
2271 | ||
2272 | *link = entry; | |
2273 | link = &entry->next; | |
2274 | } | |
2275 | ||
2276 | closedir(dp); | |
2277 | if (local_err == NULL) { | |
2278 | /* there's no guest with zero memory blocks */ | |
2279 | if (head == NULL) { | |
2280 | error_setg(errp, "guest reported zero memory blocks!"); | |
2281 | } | |
2282 | return head; | |
2283 | } | |
2284 | ||
2285 | qapi_free_GuestMemoryBlockList(head); | |
2286 | error_propagate(errp, local_err); | |
2287 | return NULL; | |
2288 | } | |
2289 | ||
2290 | GuestMemoryBlockResponseList * | |
2291 | qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) | |
2292 | { | |
2293 | GuestMemoryBlockResponseList *head, **link; | |
2294 | Error *local_err = NULL; | |
2295 | ||
2296 | head = NULL; | |
2297 | link = &head; | |
2298 | ||
2299 | while (mem_blks != NULL) { | |
2300 | GuestMemoryBlockResponse *result; | |
2301 | GuestMemoryBlockResponseList *entry; | |
2302 | GuestMemoryBlock *current_mem_blk = mem_blks->value; | |
2303 | ||
2304 | result = g_malloc0(sizeof(*result)); | |
2305 | result->phys_index = current_mem_blk->phys_index; | |
2306 | transfer_memory_block(current_mem_blk, false, result, &local_err); | |
2307 | if (local_err) { /* should never happen */ | |
2308 | goto err; | |
2309 | } | |
2310 | entry = g_malloc0(sizeof *entry); | |
2311 | entry->value = result; | |
2312 | ||
2313 | *link = entry; | |
2314 | link = &entry->next; | |
2315 | mem_blks = mem_blks->next; | |
2316 | } | |
2317 | ||
2318 | return head; | |
2319 | err: | |
2320 | qapi_free_GuestMemoryBlockResponseList(head); | |
2321 | error_propagate(errp, local_err); | |
2322 | return NULL; | |
2323 | } | |
2324 | ||
2325 | GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) | |
2326 | { | |
2327 | Error *local_err = NULL; | |
2328 | char *dirpath; | |
2329 | int dirfd; | |
2330 | char *buf; | |
2331 | GuestMemoryBlockInfo *info; | |
2332 | ||
2333 | dirpath = g_strdup_printf("/sys/devices/system/memory/"); | |
2334 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); | |
2335 | if (dirfd == -1) { | |
2336 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); | |
2337 | g_free(dirpath); | |
2338 | return NULL; | |
2339 | } | |
2340 | g_free(dirpath); | |
2341 | ||
2342 | buf = g_malloc0(20); | |
2343 | ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err); | |
2344 | close(dirfd); | |
2345 | if (local_err) { | |
2346 | g_free(buf); | |
2347 | error_propagate(errp, local_err); | |
2348 | return NULL; | |
2349 | } | |
2350 | ||
2351 | info = g_new0(GuestMemoryBlockInfo, 1); | |
2352 | info->size = strtol(buf, NULL, 16); /* the unit is bytes */ | |
2353 | ||
2354 | g_free(buf); | |
2355 | ||
2356 | return info; | |
2357 | } | |
2358 | ||
2359 | #else /* defined(__linux__) */ | |
2360 | ||
2361 | void qmp_guest_suspend_disk(Error **errp) | |
2362 | { | |
2363 | error_setg(errp, QERR_UNSUPPORTED); | |
2364 | } | |
2365 | ||
2366 | void qmp_guest_suspend_ram(Error **errp) | |
2367 | { | |
2368 | error_setg(errp, QERR_UNSUPPORTED); | |
2369 | } | |
2370 | ||
2371 | void qmp_guest_suspend_hybrid(Error **errp) | |
2372 | { | |
2373 | error_setg(errp, QERR_UNSUPPORTED); | |
2374 | } | |
2375 | ||
2376 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) | |
2377 | { | |
2378 | error_setg(errp, QERR_UNSUPPORTED); | |
2379 | return NULL; | |
2380 | } | |
2381 | ||
2382 | GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) | |
2383 | { | |
2384 | error_setg(errp, QERR_UNSUPPORTED); | |
2385 | return NULL; | |
2386 | } | |
2387 | ||
2388 | int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) | |
2389 | { | |
2390 | error_setg(errp, QERR_UNSUPPORTED); | |
2391 | return -1; | |
2392 | } | |
2393 | ||
2394 | void qmp_guest_set_user_password(const char *username, | |
2395 | const char *password, | |
2396 | bool crypted, | |
2397 | Error **errp) | |
2398 | { | |
2399 | error_setg(errp, QERR_UNSUPPORTED); | |
2400 | } | |
2401 | ||
2402 | GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) | |
2403 | { | |
2404 | error_setg(errp, QERR_UNSUPPORTED); | |
2405 | return NULL; | |
2406 | } | |
2407 | ||
2408 | GuestMemoryBlockResponseList * | |
2409 | qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) | |
2410 | { | |
2411 | error_setg(errp, QERR_UNSUPPORTED); | |
2412 | return NULL; | |
2413 | } | |
2414 | ||
2415 | GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) | |
2416 | { | |
2417 | error_setg(errp, QERR_UNSUPPORTED); | |
2418 | return NULL; | |
2419 | } | |
2420 | ||
2421 | #endif | |
2422 | ||
2423 | #if !defined(CONFIG_FSFREEZE) | |
2424 | ||
2425 | GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) | |
2426 | { | |
2427 | error_setg(errp, QERR_UNSUPPORTED); | |
2428 | return NULL; | |
2429 | } | |
2430 | ||
2431 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp) | |
2432 | { | |
2433 | error_setg(errp, QERR_UNSUPPORTED); | |
2434 | ||
2435 | return 0; | |
2436 | } | |
2437 | ||
2438 | int64_t qmp_guest_fsfreeze_freeze(Error **errp) | |
2439 | { | |
2440 | error_setg(errp, QERR_UNSUPPORTED); | |
2441 | ||
2442 | return 0; | |
2443 | } | |
2444 | ||
2445 | int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints, | |
2446 | strList *mountpoints, | |
2447 | Error **errp) | |
2448 | { | |
2449 | error_setg(errp, QERR_UNSUPPORTED); | |
2450 | ||
2451 | return 0; | |
2452 | } | |
2453 | ||
2454 | int64_t qmp_guest_fsfreeze_thaw(Error **errp) | |
2455 | { | |
2456 | error_setg(errp, QERR_UNSUPPORTED); | |
2457 | ||
2458 | return 0; | |
2459 | } | |
2460 | #endif /* CONFIG_FSFREEZE */ | |
2461 | ||
2462 | #if !defined(CONFIG_FSTRIM) | |
2463 | GuestFilesystemTrimResponse * | |
2464 | qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) | |
2465 | { | |
2466 | error_setg(errp, QERR_UNSUPPORTED); | |
2467 | return NULL; | |
2468 | } | |
2469 | #endif | |
2470 | ||
2471 | /* add unsupported commands to the blacklist */ | |
2472 | GList *ga_command_blacklist_init(GList *blacklist) | |
2473 | { | |
2474 | #if !defined(__linux__) | |
2475 | { | |
2476 | const char *list[] = { | |
2477 | "guest-suspend-disk", "guest-suspend-ram", | |
2478 | "guest-suspend-hybrid", "guest-network-get-interfaces", | |
2479 | "guest-get-vcpus", "guest-set-vcpus", | |
2480 | "guest-get-memory-blocks", "guest-set-memory-blocks", | |
2481 | "guest-get-memory-block-size", NULL}; | |
2482 | char **p = (char **)list; | |
2483 | ||
2484 | while (*p) { | |
2485 | blacklist = g_list_append(blacklist, g_strdup(*p++)); | |
2486 | } | |
2487 | } | |
2488 | #endif | |
2489 | ||
2490 | #if !defined(CONFIG_FSFREEZE) | |
2491 | { | |
2492 | const char *list[] = { | |
2493 | "guest-get-fsinfo", "guest-fsfreeze-status", | |
2494 | "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list", | |
2495 | "guest-fsfreeze-thaw", "guest-get-fsinfo", NULL}; | |
2496 | char **p = (char **)list; | |
2497 | ||
2498 | while (*p) { | |
2499 | blacklist = g_list_append(blacklist, g_strdup(*p++)); | |
2500 | } | |
2501 | } | |
2502 | #endif | |
2503 | ||
2504 | #if !defined(CONFIG_FSTRIM) | |
2505 | blacklist = g_list_append(blacklist, g_strdup("guest-fstrim")); | |
2506 | #endif | |
2507 | ||
2508 | return blacklist; | |
2509 | } | |
2510 | ||
2511 | /* register init/cleanup routines for stateful command groups */ | |
2512 | void ga_command_state_init(GAState *s, GACommandState *cs) | |
2513 | { | |
2514 | #if defined(CONFIG_FSFREEZE) | |
2515 | ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup); | |
2516 | #endif | |
2517 | } |