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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/utsname.h> | |
17 | #include <sys/wait.h> | |
18 | #include <dirent.h> | |
19 | #include "guest-agent-core.h" | |
20 | #include "qga-qapi-commands.h" | |
21 | #include "qapi/error.h" | |
22 | #include "qapi/qmp/qerror.h" | |
23 | #include "qemu/queue.h" | |
24 | #include "qemu/host-utils.h" | |
25 | #include "qemu/sockets.h" | |
26 | #include "qemu/base64.h" | |
27 | #include "qemu/cutils.h" | |
28 | #include "commands-common.h" | |
29 | #include "block/nvme.h" | |
30 | #include "cutils.h" | |
31 | ||
32 | #ifdef HAVE_UTMPX | |
33 | #include <utmpx.h> | |
34 | #endif | |
35 | ||
36 | #if defined(__linux__) | |
37 | #include <mntent.h> | |
38 | #include <linux/fs.h> | |
39 | #include <sys/statvfs.h> | |
40 | #include <linux/nvme_ioctl.h> | |
41 | ||
42 | #ifdef CONFIG_LIBUDEV | |
43 | #include <libudev.h> | |
44 | #endif | |
45 | ||
46 | #ifdef FIFREEZE | |
47 | #define CONFIG_FSFREEZE | |
48 | #endif | |
49 | #ifdef FITRIM | |
50 | #define CONFIG_FSTRIM | |
51 | #endif | |
52 | #endif | |
53 | ||
54 | #ifdef HAVE_GETIFADDRS | |
55 | #include <arpa/inet.h> | |
56 | #include <sys/socket.h> | |
57 | #include <net/if.h> | |
58 | #include <sys/types.h> | |
59 | #include <ifaddrs.h> | |
60 | #ifdef CONFIG_SOLARIS | |
61 | #include <sys/sockio.h> | |
62 | #endif | |
63 | #endif | |
64 | ||
65 | static void ga_wait_child(pid_t pid, int *status, Error **errp) | |
66 | { | |
67 | pid_t rpid; | |
68 | ||
69 | *status = 0; | |
70 | ||
71 | do { | |
72 | rpid = waitpid(pid, status, 0); | |
73 | } while (rpid == -1 && errno == EINTR); | |
74 | ||
75 | if (rpid == -1) { | |
76 | error_setg_errno(errp, errno, "failed to wait for child (pid: %d)", | |
77 | pid); | |
78 | return; | |
79 | } | |
80 | ||
81 | g_assert(rpid == pid); | |
82 | } | |
83 | ||
84 | void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp) | |
85 | { | |
86 | const char *shutdown_flag; | |
87 | Error *local_err = NULL; | |
88 | pid_t pid; | |
89 | int status; | |
90 | ||
91 | #ifdef CONFIG_SOLARIS | |
92 | const char *powerdown_flag = "-i5"; | |
93 | const char *halt_flag = "-i0"; | |
94 | const char *reboot_flag = "-i6"; | |
95 | #else | |
96 | const char *powerdown_flag = "-P"; | |
97 | const char *halt_flag = "-H"; | |
98 | const char *reboot_flag = "-r"; | |
99 | #endif | |
100 | ||
101 | slog("guest-shutdown called, mode: %s", mode); | |
102 | if (!has_mode || strcmp(mode, "powerdown") == 0) { | |
103 | shutdown_flag = powerdown_flag; | |
104 | } else if (strcmp(mode, "halt") == 0) { | |
105 | shutdown_flag = halt_flag; | |
106 | } else if (strcmp(mode, "reboot") == 0) { | |
107 | shutdown_flag = reboot_flag; | |
108 | } else { | |
109 | error_setg(errp, | |
110 | "mode is invalid (valid values are: halt|powerdown|reboot"); | |
111 | return; | |
112 | } | |
113 | ||
114 | pid = fork(); | |
115 | if (pid == 0) { | |
116 | /* child, start the shutdown */ | |
117 | setsid(); | |
118 | reopen_fd_to_null(0); | |
119 | reopen_fd_to_null(1); | |
120 | reopen_fd_to_null(2); | |
121 | ||
122 | #ifdef CONFIG_SOLARIS | |
123 | execl("/sbin/shutdown", "shutdown", shutdown_flag, "-g0", "-y", | |
124 | "hypervisor initiated shutdown", (char *)NULL); | |
125 | #else | |
126 | execl("/sbin/shutdown", "shutdown", "-h", shutdown_flag, "+0", | |
127 | "hypervisor initiated shutdown", (char *)NULL); | |
128 | #endif | |
129 | _exit(EXIT_FAILURE); | |
130 | } else if (pid < 0) { | |
131 | error_setg_errno(errp, errno, "failed to create child process"); | |
132 | return; | |
133 | } | |
134 | ||
135 | ga_wait_child(pid, &status, &local_err); | |
136 | if (local_err) { | |
137 | error_propagate(errp, local_err); | |
138 | return; | |
139 | } | |
140 | ||
141 | if (!WIFEXITED(status)) { | |
142 | error_setg(errp, "child process has terminated abnormally"); | |
143 | return; | |
144 | } | |
145 | ||
146 | if (WEXITSTATUS(status)) { | |
147 | error_setg(errp, "child process has failed to shutdown"); | |
148 | return; | |
149 | } | |
150 | ||
151 | /* succeeded */ | |
152 | } | |
153 | ||
154 | void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp) | |
155 | { | |
156 | int ret; | |
157 | int status; | |
158 | pid_t pid; | |
159 | Error *local_err = NULL; | |
160 | struct timeval tv; | |
161 | static const char hwclock_path[] = "/sbin/hwclock"; | |
162 | static int hwclock_available = -1; | |
163 | ||
164 | if (hwclock_available < 0) { | |
165 | hwclock_available = (access(hwclock_path, X_OK) == 0); | |
166 | } | |
167 | ||
168 | if (!hwclock_available) { | |
169 | error_setg(errp, QERR_UNSUPPORTED); | |
170 | return; | |
171 | } | |
172 | ||
173 | /* If user has passed a time, validate and set it. */ | |
174 | if (has_time) { | |
175 | GDate date = { 0, }; | |
176 | ||
177 | /* year-2038 will overflow in case time_t is 32bit */ | |
178 | if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) { | |
179 | error_setg(errp, "Time %" PRId64 " is too large", time_ns); | |
180 | return; | |
181 | } | |
182 | ||
183 | tv.tv_sec = time_ns / 1000000000; | |
184 | tv.tv_usec = (time_ns % 1000000000) / 1000; | |
185 | g_date_set_time_t(&date, tv.tv_sec); | |
186 | if (date.year < 1970 || date.year >= 2070) { | |
187 | error_setg_errno(errp, errno, "Invalid time"); | |
188 | return; | |
189 | } | |
190 | ||
191 | ret = settimeofday(&tv, NULL); | |
192 | if (ret < 0) { | |
193 | error_setg_errno(errp, errno, "Failed to set time to guest"); | |
194 | return; | |
195 | } | |
196 | } | |
197 | ||
198 | /* Now, if user has passed a time to set and the system time is set, we | |
199 | * just need to synchronize the hardware clock. However, if no time was | |
200 | * passed, user is requesting the opposite: set the system time from the | |
201 | * hardware clock (RTC). */ | |
202 | pid = fork(); | |
203 | if (pid == 0) { | |
204 | setsid(); | |
205 | reopen_fd_to_null(0); | |
206 | reopen_fd_to_null(1); | |
207 | reopen_fd_to_null(2); | |
208 | ||
209 | /* Use '/sbin/hwclock -w' to set RTC from the system time, | |
210 | * or '/sbin/hwclock -s' to set the system time from RTC. */ | |
211 | execl(hwclock_path, "hwclock", has_time ? "-w" : "-s", NULL); | |
212 | _exit(EXIT_FAILURE); | |
213 | } else if (pid < 0) { | |
214 | error_setg_errno(errp, errno, "failed to create child process"); | |
215 | return; | |
216 | } | |
217 | ||
218 | ga_wait_child(pid, &status, &local_err); | |
219 | if (local_err) { | |
220 | error_propagate(errp, local_err); | |
221 | return; | |
222 | } | |
223 | ||
224 | if (!WIFEXITED(status)) { | |
225 | error_setg(errp, "child process has terminated abnormally"); | |
226 | return; | |
227 | } | |
228 | ||
229 | if (WEXITSTATUS(status)) { | |
230 | error_setg(errp, "hwclock failed to set hardware clock to system time"); | |
231 | return; | |
232 | } | |
233 | } | |
234 | ||
235 | typedef enum { | |
236 | RW_STATE_NEW, | |
237 | RW_STATE_READING, | |
238 | RW_STATE_WRITING, | |
239 | } RwState; | |
240 | ||
241 | struct GuestFileHandle { | |
242 | uint64_t id; | |
243 | FILE *fh; | |
244 | RwState state; | |
245 | QTAILQ_ENTRY(GuestFileHandle) next; | |
246 | }; | |
247 | ||
248 | static struct { | |
249 | QTAILQ_HEAD(, GuestFileHandle) filehandles; | |
250 | } guest_file_state = { | |
251 | .filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles), | |
252 | }; | |
253 | ||
254 | static int64_t guest_file_handle_add(FILE *fh, Error **errp) | |
255 | { | |
256 | GuestFileHandle *gfh; | |
257 | int64_t handle; | |
258 | ||
259 | handle = ga_get_fd_handle(ga_state, errp); | |
260 | if (handle < 0) { | |
261 | return -1; | |
262 | } | |
263 | ||
264 | gfh = g_new0(GuestFileHandle, 1); | |
265 | gfh->id = handle; | |
266 | gfh->fh = fh; | |
267 | QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next); | |
268 | ||
269 | return handle; | |
270 | } | |
271 | ||
272 | GuestFileHandle *guest_file_handle_find(int64_t id, Error **errp) | |
273 | { | |
274 | GuestFileHandle *gfh; | |
275 | ||
276 | QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next) | |
277 | { | |
278 | if (gfh->id == id) { | |
279 | return gfh; | |
280 | } | |
281 | } | |
282 | ||
283 | error_setg(errp, "handle '%" PRId64 "' has not been found", id); | |
284 | return NULL; | |
285 | } | |
286 | ||
287 | typedef const char * const ccpc; | |
288 | ||
289 | #ifndef O_BINARY | |
290 | #define O_BINARY 0 | |
291 | #endif | |
292 | ||
293 | /* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */ | |
294 | static const struct { | |
295 | ccpc *forms; | |
296 | int oflag_base; | |
297 | } guest_file_open_modes[] = { | |
298 | { (ccpc[]){ "r", NULL }, O_RDONLY }, | |
299 | { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY }, | |
300 | { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC }, | |
301 | { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY }, | |
302 | { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND }, | |
303 | { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY }, | |
304 | { (ccpc[]){ "r+", NULL }, O_RDWR }, | |
305 | { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY }, | |
306 | { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC }, | |
307 | { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY }, | |
308 | { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND }, | |
309 | { (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY } | |
310 | }; | |
311 | ||
312 | static int | |
313 | find_open_flag(const char *mode_str, Error **errp) | |
314 | { | |
315 | unsigned mode; | |
316 | ||
317 | for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) { | |
318 | ccpc *form; | |
319 | ||
320 | form = guest_file_open_modes[mode].forms; | |
321 | while (*form != NULL && strcmp(*form, mode_str) != 0) { | |
322 | ++form; | |
323 | } | |
324 | if (*form != NULL) { | |
325 | break; | |
326 | } | |
327 | } | |
328 | ||
329 | if (mode == ARRAY_SIZE(guest_file_open_modes)) { | |
330 | error_setg(errp, "invalid file open mode '%s'", mode_str); | |
331 | return -1; | |
332 | } | |
333 | return guest_file_open_modes[mode].oflag_base | O_NOCTTY | O_NONBLOCK; | |
334 | } | |
335 | ||
336 | #define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \ | |
337 | S_IRGRP | S_IWGRP | \ | |
338 | S_IROTH | S_IWOTH) | |
339 | ||
340 | static FILE * | |
341 | safe_open_or_create(const char *path, const char *mode, Error **errp) | |
342 | { | |
343 | int oflag; | |
344 | int fd = -1; | |
345 | FILE *f = NULL; | |
346 | ||
347 | oflag = find_open_flag(mode, errp); | |
348 | if (oflag < 0) { | |
349 | goto end; | |
350 | } | |
351 | ||
352 | /* If the caller wants / allows creation of a new file, we implement it | |
353 | * with a two step process: open() + (open() / fchmod()). | |
354 | * | |
355 | * First we insist on creating the file exclusively as a new file. If | |
356 | * that succeeds, we're free to set any file-mode bits on it. (The | |
357 | * motivation is that we want to set those file-mode bits independently | |
358 | * of the current umask.) | |
359 | * | |
360 | * If the exclusive creation fails because the file already exists | |
361 | * (EEXIST is not possible for any other reason), we just attempt to | |
362 | * open the file, but in this case we won't be allowed to change the | |
363 | * file-mode bits on the preexistent file. | |
364 | * | |
365 | * The pathname should never disappear between the two open()s in | |
366 | * practice. If it happens, then someone very likely tried to race us. | |
367 | * In this case just go ahead and report the ENOENT from the second | |
368 | * open() to the caller. | |
369 | * | |
370 | * If the caller wants to open a preexistent file, then the first | |
371 | * open() is decisive and its third argument is ignored, and the second | |
372 | * open() and the fchmod() are never called. | |
373 | */ | |
374 | fd = qga_open_cloexec(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0); | |
375 | if (fd == -1 && errno == EEXIST) { | |
376 | oflag &= ~(unsigned)O_CREAT; | |
377 | fd = qga_open_cloexec(path, oflag, 0); | |
378 | } | |
379 | if (fd == -1) { | |
380 | error_setg_errno(errp, errno, | |
381 | "failed to open file '%s' (mode: '%s')", | |
382 | path, mode); | |
383 | goto end; | |
384 | } | |
385 | ||
386 | if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) { | |
387 | error_setg_errno(errp, errno, "failed to set permission " | |
388 | "0%03o on new file '%s' (mode: '%s')", | |
389 | (unsigned)DEFAULT_NEW_FILE_MODE, path, mode); | |
390 | goto end; | |
391 | } | |
392 | ||
393 | f = fdopen(fd, mode); | |
394 | if (f == NULL) { | |
395 | error_setg_errno(errp, errno, "failed to associate stdio stream with " | |
396 | "file descriptor %d, file '%s' (mode: '%s')", | |
397 | fd, path, mode); | |
398 | } | |
399 | ||
400 | end: | |
401 | if (f == NULL && fd != -1) { | |
402 | close(fd); | |
403 | if (oflag & O_CREAT) { | |
404 | unlink(path); | |
405 | } | |
406 | } | |
407 | return f; | |
408 | } | |
409 | ||
410 | int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, | |
411 | Error **errp) | |
412 | { | |
413 | FILE *fh; | |
414 | Error *local_err = NULL; | |
415 | int64_t handle; | |
416 | ||
417 | if (!has_mode) { | |
418 | mode = "r"; | |
419 | } | |
420 | slog("guest-file-open called, filepath: %s, mode: %s", path, mode); | |
421 | fh = safe_open_or_create(path, mode, &local_err); | |
422 | if (local_err != NULL) { | |
423 | error_propagate(errp, local_err); | |
424 | return -1; | |
425 | } | |
426 | ||
427 | /* set fd non-blocking to avoid common use cases (like reading from a | |
428 | * named pipe) from hanging the agent | |
429 | */ | |
430 | if (!g_unix_set_fd_nonblocking(fileno(fh), true, NULL)) { | |
431 | fclose(fh); | |
432 | error_setg_errno(errp, errno, "Failed to set FD nonblocking"); | |
433 | return -1; | |
434 | } | |
435 | ||
436 | handle = guest_file_handle_add(fh, errp); | |
437 | if (handle < 0) { | |
438 | fclose(fh); | |
439 | return -1; | |
440 | } | |
441 | ||
442 | slog("guest-file-open, handle: %" PRId64, handle); | |
443 | return handle; | |
444 | } | |
445 | ||
446 | void qmp_guest_file_close(int64_t handle, Error **errp) | |
447 | { | |
448 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); | |
449 | int ret; | |
450 | ||
451 | slog("guest-file-close called, handle: %" PRId64, handle); | |
452 | if (!gfh) { | |
453 | return; | |
454 | } | |
455 | ||
456 | ret = fclose(gfh->fh); | |
457 | if (ret == EOF) { | |
458 | error_setg_errno(errp, errno, "failed to close handle"); | |
459 | return; | |
460 | } | |
461 | ||
462 | QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next); | |
463 | g_free(gfh); | |
464 | } | |
465 | ||
466 | GuestFileRead *guest_file_read_unsafe(GuestFileHandle *gfh, | |
467 | int64_t count, Error **errp) | |
468 | { | |
469 | GuestFileRead *read_data = NULL; | |
470 | guchar *buf; | |
471 | FILE *fh = gfh->fh; | |
472 | size_t read_count; | |
473 | ||
474 | /* explicitly flush when switching from writing to reading */ | |
475 | if (gfh->state == RW_STATE_WRITING) { | |
476 | int ret = fflush(fh); | |
477 | if (ret == EOF) { | |
478 | error_setg_errno(errp, errno, "failed to flush file"); | |
479 | return NULL; | |
480 | } | |
481 | gfh->state = RW_STATE_NEW; | |
482 | } | |
483 | ||
484 | buf = g_malloc0(count + 1); | |
485 | read_count = fread(buf, 1, count, fh); | |
486 | if (ferror(fh)) { | |
487 | error_setg_errno(errp, errno, "failed to read file"); | |
488 | } else { | |
489 | buf[read_count] = 0; | |
490 | read_data = g_new0(GuestFileRead, 1); | |
491 | read_data->count = read_count; | |
492 | read_data->eof = feof(fh); | |
493 | if (read_count) { | |
494 | read_data->buf_b64 = g_base64_encode(buf, read_count); | |
495 | } | |
496 | gfh->state = RW_STATE_READING; | |
497 | } | |
498 | g_free(buf); | |
499 | clearerr(fh); | |
500 | ||
501 | return read_data; | |
502 | } | |
503 | ||
504 | GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64, | |
505 | bool has_count, int64_t count, | |
506 | Error **errp) | |
507 | { | |
508 | GuestFileWrite *write_data = NULL; | |
509 | guchar *buf; | |
510 | gsize buf_len; | |
511 | int write_count; | |
512 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); | |
513 | FILE *fh; | |
514 | ||
515 | if (!gfh) { | |
516 | return NULL; | |
517 | } | |
518 | ||
519 | fh = gfh->fh; | |
520 | ||
521 | if (gfh->state == RW_STATE_READING) { | |
522 | int ret = fseek(fh, 0, SEEK_CUR); | |
523 | if (ret == -1) { | |
524 | error_setg_errno(errp, errno, "failed to seek file"); | |
525 | return NULL; | |
526 | } | |
527 | gfh->state = RW_STATE_NEW; | |
528 | } | |
529 | ||
530 | buf = qbase64_decode(buf_b64, -1, &buf_len, errp); | |
531 | if (!buf) { | |
532 | return NULL; | |
533 | } | |
534 | ||
535 | if (!has_count) { | |
536 | count = buf_len; | |
537 | } else if (count < 0 || count > buf_len) { | |
538 | error_setg(errp, "value '%" PRId64 "' is invalid for argument count", | |
539 | count); | |
540 | g_free(buf); | |
541 | return NULL; | |
542 | } | |
543 | ||
544 | write_count = fwrite(buf, 1, count, fh); | |
545 | if (ferror(fh)) { | |
546 | error_setg_errno(errp, errno, "failed to write to file"); | |
547 | slog("guest-file-write failed, handle: %" PRId64, handle); | |
548 | } else { | |
549 | write_data = g_new0(GuestFileWrite, 1); | |
550 | write_data->count = write_count; | |
551 | write_data->eof = feof(fh); | |
552 | gfh->state = RW_STATE_WRITING; | |
553 | } | |
554 | g_free(buf); | |
555 | clearerr(fh); | |
556 | ||
557 | return write_data; | |
558 | } | |
559 | ||
560 | struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset, | |
561 | GuestFileWhence *whence_code, | |
562 | Error **errp) | |
563 | { | |
564 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); | |
565 | GuestFileSeek *seek_data = NULL; | |
566 | FILE *fh; | |
567 | int ret; | |
568 | int whence; | |
569 | Error *err = NULL; | |
570 | ||
571 | if (!gfh) { | |
572 | return NULL; | |
573 | } | |
574 | ||
575 | /* We stupidly exposed 'whence':'int' in our qapi */ | |
576 | whence = ga_parse_whence(whence_code, &err); | |
577 | if (err) { | |
578 | error_propagate(errp, err); | |
579 | return NULL; | |
580 | } | |
581 | ||
582 | fh = gfh->fh; | |
583 | ret = fseek(fh, offset, whence); | |
584 | if (ret == -1) { | |
585 | error_setg_errno(errp, errno, "failed to seek file"); | |
586 | if (errno == ESPIPE) { | |
587 | /* file is non-seekable, stdio shouldn't be buffering anyways */ | |
588 | gfh->state = RW_STATE_NEW; | |
589 | } | |
590 | } else { | |
591 | seek_data = g_new0(GuestFileSeek, 1); | |
592 | seek_data->position = ftell(fh); | |
593 | seek_data->eof = feof(fh); | |
594 | gfh->state = RW_STATE_NEW; | |
595 | } | |
596 | clearerr(fh); | |
597 | ||
598 | return seek_data; | |
599 | } | |
600 | ||
601 | void qmp_guest_file_flush(int64_t handle, Error **errp) | |
602 | { | |
603 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); | |
604 | FILE *fh; | |
605 | int ret; | |
606 | ||
607 | if (!gfh) { | |
608 | return; | |
609 | } | |
610 | ||
611 | fh = gfh->fh; | |
612 | ret = fflush(fh); | |
613 | if (ret == EOF) { | |
614 | error_setg_errno(errp, errno, "failed to flush file"); | |
615 | } else { | |
616 | gfh->state = RW_STATE_NEW; | |
617 | } | |
618 | } | |
619 | ||
620 | /* linux-specific implementations. avoid this if at all possible. */ | |
621 | #if defined(__linux__) | |
622 | ||
623 | #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) | |
624 | typedef struct FsMount { | |
625 | char *dirname; | |
626 | char *devtype; | |
627 | unsigned int devmajor, devminor; | |
628 | QTAILQ_ENTRY(FsMount) next; | |
629 | } FsMount; | |
630 | ||
631 | typedef QTAILQ_HEAD(FsMountList, FsMount) FsMountList; | |
632 | ||
633 | static void free_fs_mount_list(FsMountList *mounts) | |
634 | { | |
635 | FsMount *mount, *temp; | |
636 | ||
637 | if (!mounts) { | |
638 | return; | |
639 | } | |
640 | ||
641 | QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) { | |
642 | QTAILQ_REMOVE(mounts, mount, next); | |
643 | g_free(mount->dirname); | |
644 | g_free(mount->devtype); | |
645 | g_free(mount); | |
646 | } | |
647 | } | |
648 | ||
649 | static int dev_major_minor(const char *devpath, | |
650 | unsigned int *devmajor, unsigned int *devminor) | |
651 | { | |
652 | struct stat st; | |
653 | ||
654 | *devmajor = 0; | |
655 | *devminor = 0; | |
656 | ||
657 | if (stat(devpath, &st) < 0) { | |
658 | slog("failed to stat device file '%s': %s", devpath, strerror(errno)); | |
659 | return -1; | |
660 | } | |
661 | if (S_ISDIR(st.st_mode)) { | |
662 | /* It is bind mount */ | |
663 | return -2; | |
664 | } | |
665 | if (S_ISBLK(st.st_mode)) { | |
666 | *devmajor = major(st.st_rdev); | |
667 | *devminor = minor(st.st_rdev); | |
668 | return 0; | |
669 | } | |
670 | return -1; | |
671 | } | |
672 | ||
673 | /* | |
674 | * Walk the mount table and build a list of local file systems | |
675 | */ | |
676 | static bool build_fs_mount_list_from_mtab(FsMountList *mounts, Error **errp) | |
677 | { | |
678 | struct mntent *ment; | |
679 | FsMount *mount; | |
680 | char const *mtab = "/proc/self/mounts"; | |
681 | FILE *fp; | |
682 | unsigned int devmajor, devminor; | |
683 | ||
684 | fp = setmntent(mtab, "r"); | |
685 | if (!fp) { | |
686 | error_setg(errp, "failed to open mtab file: '%s'", mtab); | |
687 | return false; | |
688 | } | |
689 | ||
690 | while ((ment = getmntent(fp))) { | |
691 | /* | |
692 | * An entry which device name doesn't start with a '/' is | |
693 | * either a dummy file system or a network file system. | |
694 | * Add special handling for smbfs and cifs as is done by | |
695 | * coreutils as well. | |
696 | */ | |
697 | if ((ment->mnt_fsname[0] != '/') || | |
698 | (strcmp(ment->mnt_type, "smbfs") == 0) || | |
699 | (strcmp(ment->mnt_type, "cifs") == 0)) { | |
700 | continue; | |
701 | } | |
702 | if (dev_major_minor(ment->mnt_fsname, &devmajor, &devminor) == -2) { | |
703 | /* Skip bind mounts */ | |
704 | continue; | |
705 | } | |
706 | ||
707 | mount = g_new0(FsMount, 1); | |
708 | mount->dirname = g_strdup(ment->mnt_dir); | |
709 | mount->devtype = g_strdup(ment->mnt_type); | |
710 | mount->devmajor = devmajor; | |
711 | mount->devminor = devminor; | |
712 | ||
713 | QTAILQ_INSERT_TAIL(mounts, mount, next); | |
714 | } | |
715 | ||
716 | endmntent(fp); | |
717 | return true; | |
718 | } | |
719 | ||
720 | static void decode_mntname(char *name, int len) | |
721 | { | |
722 | int i, j = 0; | |
723 | for (i = 0; i <= len; i++) { | |
724 | if (name[i] != '\\') { | |
725 | name[j++] = name[i]; | |
726 | } else if (name[i + 1] == '\\') { | |
727 | name[j++] = '\\'; | |
728 | i++; | |
729 | } else if (name[i + 1] >= '0' && name[i + 1] <= '3' && | |
730 | name[i + 2] >= '0' && name[i + 2] <= '7' && | |
731 | name[i + 3] >= '0' && name[i + 3] <= '7') { | |
732 | name[j++] = (name[i + 1] - '0') * 64 + | |
733 | (name[i + 2] - '0') * 8 + | |
734 | (name[i + 3] - '0'); | |
735 | i += 3; | |
736 | } else { | |
737 | name[j++] = name[i]; | |
738 | } | |
739 | } | |
740 | } | |
741 | ||
742 | static bool build_fs_mount_list(FsMountList *mounts, Error **errp) | |
743 | { | |
744 | FsMount *mount; | |
745 | char const *mountinfo = "/proc/self/mountinfo"; | |
746 | FILE *fp; | |
747 | char *line = NULL, *dash; | |
748 | size_t n; | |
749 | char check; | |
750 | unsigned int devmajor, devminor; | |
751 | int ret, dir_s, dir_e, type_s, type_e, dev_s, dev_e; | |
752 | ||
753 | fp = fopen(mountinfo, "r"); | |
754 | if (!fp) { | |
755 | return build_fs_mount_list_from_mtab(mounts, errp); | |
756 | } | |
757 | ||
758 | while (getline(&line, &n, fp) != -1) { | |
759 | ret = sscanf(line, "%*u %*u %u:%u %*s %n%*s%n%c", | |
760 | &devmajor, &devminor, &dir_s, &dir_e, &check); | |
761 | if (ret < 3) { | |
762 | continue; | |
763 | } | |
764 | dash = strstr(line + dir_e, " - "); | |
765 | if (!dash) { | |
766 | continue; | |
767 | } | |
768 | ret = sscanf(dash, " - %n%*s%n %n%*s%n%c", | |
769 | &type_s, &type_e, &dev_s, &dev_e, &check); | |
770 | if (ret < 1) { | |
771 | continue; | |
772 | } | |
773 | line[dir_e] = 0; | |
774 | dash[type_e] = 0; | |
775 | dash[dev_e] = 0; | |
776 | decode_mntname(line + dir_s, dir_e - dir_s); | |
777 | decode_mntname(dash + dev_s, dev_e - dev_s); | |
778 | if (devmajor == 0) { | |
779 | /* btrfs reports major number = 0 */ | |
780 | if (strcmp("btrfs", dash + type_s) != 0 || | |
781 | dev_major_minor(dash + dev_s, &devmajor, &devminor) < 0) { | |
782 | continue; | |
783 | } | |
784 | } | |
785 | ||
786 | mount = g_new0(FsMount, 1); | |
787 | mount->dirname = g_strdup(line + dir_s); | |
788 | mount->devtype = g_strdup(dash + type_s); | |
789 | mount->devmajor = devmajor; | |
790 | mount->devminor = devminor; | |
791 | ||
792 | QTAILQ_INSERT_TAIL(mounts, mount, next); | |
793 | } | |
794 | free(line); | |
795 | ||
796 | fclose(fp); | |
797 | return true; | |
798 | } | |
799 | #endif | |
800 | ||
801 | #if defined(CONFIG_FSFREEZE) | |
802 | ||
803 | static char *get_pci_driver(char const *syspath, int pathlen, Error **errp) | |
804 | { | |
805 | char *path; | |
806 | char *dpath; | |
807 | char *driver = NULL; | |
808 | char buf[PATH_MAX]; | |
809 | ssize_t len; | |
810 | ||
811 | path = g_strndup(syspath, pathlen); | |
812 | dpath = g_strdup_printf("%s/driver", path); | |
813 | len = readlink(dpath, buf, sizeof(buf) - 1); | |
814 | if (len != -1) { | |
815 | buf[len] = 0; | |
816 | driver = g_path_get_basename(buf); | |
817 | } | |
818 | g_free(dpath); | |
819 | g_free(path); | |
820 | return driver; | |
821 | } | |
822 | ||
823 | static int compare_uint(const void *_a, const void *_b) | |
824 | { | |
825 | unsigned int a = *(unsigned int *)_a; | |
826 | unsigned int b = *(unsigned int *)_b; | |
827 | ||
828 | return a < b ? -1 : a > b ? 1 : 0; | |
829 | } | |
830 | ||
831 | /* Walk the specified sysfs and build a sorted list of host or ata numbers */ | |
832 | static int build_hosts(char const *syspath, char const *host, bool ata, | |
833 | unsigned int *hosts, int hosts_max, Error **errp) | |
834 | { | |
835 | char *path; | |
836 | DIR *dir; | |
837 | struct dirent *entry; | |
838 | int i = 0; | |
839 | ||
840 | path = g_strndup(syspath, host - syspath); | |
841 | dir = opendir(path); | |
842 | if (!dir) { | |
843 | error_setg_errno(errp, errno, "opendir(\"%s\")", path); | |
844 | g_free(path); | |
845 | return -1; | |
846 | } | |
847 | ||
848 | while (i < hosts_max) { | |
849 | entry = readdir(dir); | |
850 | if (!entry) { | |
851 | break; | |
852 | } | |
853 | if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) { | |
854 | ++i; | |
855 | } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) { | |
856 | ++i; | |
857 | } | |
858 | } | |
859 | ||
860 | qsort(hosts, i, sizeof(hosts[0]), compare_uint); | |
861 | ||
862 | g_free(path); | |
863 | closedir(dir); | |
864 | return i; | |
865 | } | |
866 | ||
867 | /* | |
868 | * Store disk device info for devices on the PCI bus. | |
869 | * Returns true if information has been stored, or false for failure. | |
870 | */ | |
871 | static bool build_guest_fsinfo_for_pci_dev(char const *syspath, | |
872 | GuestDiskAddress *disk, | |
873 | Error **errp) | |
874 | { | |
875 | unsigned int pci[4], host, hosts[8], tgt[3]; | |
876 | int i, nhosts = 0, pcilen; | |
877 | GuestPCIAddress *pciaddr = disk->pci_controller; | |
878 | bool has_ata = false, has_host = false, has_tgt = false; | |
879 | char *p, *q, *driver = NULL; | |
880 | bool ret = false; | |
881 | ||
882 | p = strstr(syspath, "/devices/pci"); | |
883 | if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n", | |
884 | pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) { | |
885 | g_debug("only pci device is supported: sysfs path '%s'", syspath); | |
886 | return false; | |
887 | } | |
888 | ||
889 | p += 12 + pcilen; | |
890 | while (true) { | |
891 | driver = get_pci_driver(syspath, p - syspath, errp); | |
892 | if (driver && (g_str_equal(driver, "ata_piix") || | |
893 | g_str_equal(driver, "sym53c8xx") || | |
894 | g_str_equal(driver, "virtio-pci") || | |
895 | g_str_equal(driver, "ahci") || | |
896 | g_str_equal(driver, "nvme"))) { | |
897 | break; | |
898 | } | |
899 | ||
900 | g_free(driver); | |
901 | if (sscanf(p, "/%x:%x:%x.%x%n", | |
902 | pci, pci + 1, pci + 2, pci + 3, &pcilen) == 4) { | |
903 | p += pcilen; | |
904 | continue; | |
905 | } | |
906 | ||
907 | g_debug("unsupported driver or sysfs path '%s'", syspath); | |
908 | return false; | |
909 | } | |
910 | ||
911 | p = strstr(syspath, "/target"); | |
912 | if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", | |
913 | tgt, tgt + 1, tgt + 2) == 3) { | |
914 | has_tgt = true; | |
915 | } | |
916 | ||
917 | p = strstr(syspath, "/ata"); | |
918 | if (p) { | |
919 | q = p + 4; | |
920 | has_ata = true; | |
921 | } else { | |
922 | p = strstr(syspath, "/host"); | |
923 | q = p + 5; | |
924 | } | |
925 | if (p && sscanf(q, "%u", &host) == 1) { | |
926 | has_host = true; | |
927 | nhosts = build_hosts(syspath, p, has_ata, hosts, | |
928 | ARRAY_SIZE(hosts), errp); | |
929 | if (nhosts < 0) { | |
930 | goto cleanup; | |
931 | } | |
932 | } | |
933 | ||
934 | pciaddr->domain = pci[0]; | |
935 | pciaddr->bus = pci[1]; | |
936 | pciaddr->slot = pci[2]; | |
937 | pciaddr->function = pci[3]; | |
938 | ||
939 | if (strcmp(driver, "ata_piix") == 0) { | |
940 | /* a host per ide bus, target*:0:<unit>:0 */ | |
941 | if (!has_host || !has_tgt) { | |
942 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); | |
943 | goto cleanup; | |
944 | } | |
945 | for (i = 0; i < nhosts; i++) { | |
946 | if (host == hosts[i]) { | |
947 | disk->bus_type = GUEST_DISK_BUS_TYPE_IDE; | |
948 | disk->bus = i; | |
949 | disk->unit = tgt[1]; | |
950 | break; | |
951 | } | |
952 | } | |
953 | if (i >= nhosts) { | |
954 | g_debug("no host for '%s' (driver '%s')", syspath, driver); | |
955 | goto cleanup; | |
956 | } | |
957 | } else if (strcmp(driver, "sym53c8xx") == 0) { | |
958 | /* scsi(LSI Logic): target*:0:<unit>:0 */ | |
959 | if (!has_tgt) { | |
960 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); | |
961 | goto cleanup; | |
962 | } | |
963 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; | |
964 | disk->unit = tgt[1]; | |
965 | } else if (strcmp(driver, "virtio-pci") == 0) { | |
966 | if (has_tgt) { | |
967 | /* virtio-scsi: target*:0:0:<unit> */ | |
968 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; | |
969 | disk->unit = tgt[2]; | |
970 | } else { | |
971 | /* virtio-blk: 1 disk per 1 device */ | |
972 | disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; | |
973 | } | |
974 | } else if (strcmp(driver, "ahci") == 0) { | |
975 | /* ahci: 1 host per 1 unit */ | |
976 | if (!has_host || !has_tgt) { | |
977 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); | |
978 | goto cleanup; | |
979 | } | |
980 | for (i = 0; i < nhosts; i++) { | |
981 | if (host == hosts[i]) { | |
982 | disk->unit = i; | |
983 | disk->bus_type = GUEST_DISK_BUS_TYPE_SATA; | |
984 | break; | |
985 | } | |
986 | } | |
987 | if (i >= nhosts) { | |
988 | g_debug("no host for '%s' (driver '%s')", syspath, driver); | |
989 | goto cleanup; | |
990 | } | |
991 | } else if (strcmp(driver, "nvme") == 0) { | |
992 | disk->bus_type = GUEST_DISK_BUS_TYPE_NVME; | |
993 | } else { | |
994 | g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath); | |
995 | goto cleanup; | |
996 | } | |
997 | ||
998 | ret = true; | |
999 | ||
1000 | cleanup: | |
1001 | g_free(driver); | |
1002 | return ret; | |
1003 | } | |
1004 | ||
1005 | /* | |
1006 | * Store disk device info for non-PCI virtio devices (for example s390x | |
1007 | * channel I/O devices). Returns true if information has been stored, or | |
1008 | * false for failure. | |
1009 | */ | |
1010 | static bool build_guest_fsinfo_for_nonpci_virtio(char const *syspath, | |
1011 | GuestDiskAddress *disk, | |
1012 | Error **errp) | |
1013 | { | |
1014 | unsigned int tgt[3]; | |
1015 | char *p; | |
1016 | ||
1017 | if (!strstr(syspath, "/virtio") || !strstr(syspath, "/block")) { | |
1018 | g_debug("Unsupported virtio device '%s'", syspath); | |
1019 | return false; | |
1020 | } | |
1021 | ||
1022 | p = strstr(syspath, "/target"); | |
1023 | if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", | |
1024 | &tgt[0], &tgt[1], &tgt[2]) == 3) { | |
1025 | /* virtio-scsi: target*:0:<target>:<unit> */ | |
1026 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; | |
1027 | disk->bus = tgt[0]; | |
1028 | disk->target = tgt[1]; | |
1029 | disk->unit = tgt[2]; | |
1030 | } else { | |
1031 | /* virtio-blk: 1 disk per 1 device */ | |
1032 | disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; | |
1033 | } | |
1034 | ||
1035 | return true; | |
1036 | } | |
1037 | ||
1038 | /* | |
1039 | * Store disk device info for CCW devices (s390x channel I/O devices). | |
1040 | * Returns true if information has been stored, or false for failure. | |
1041 | */ | |
1042 | static bool build_guest_fsinfo_for_ccw_dev(char const *syspath, | |
1043 | GuestDiskAddress *disk, | |
1044 | Error **errp) | |
1045 | { | |
1046 | unsigned int cssid, ssid, subchno, devno; | |
1047 | char *p; | |
1048 | ||
1049 | p = strstr(syspath, "/devices/css"); | |
1050 | if (!p || sscanf(p + 12, "%*x/%x.%x.%x/%*x.%*x.%x/", | |
1051 | &cssid, &ssid, &subchno, &devno) < 4) { | |
1052 | g_debug("could not parse ccw device sysfs path: %s", syspath); | |
1053 | return false; | |
1054 | } | |
1055 | ||
1056 | disk->has_ccw_address = true; | |
1057 | disk->ccw_address = g_new0(GuestCCWAddress, 1); | |
1058 | disk->ccw_address->cssid = cssid; | |
1059 | disk->ccw_address->ssid = ssid; | |
1060 | disk->ccw_address->subchno = subchno; | |
1061 | disk->ccw_address->devno = devno; | |
1062 | ||
1063 | if (strstr(p, "/virtio")) { | |
1064 | build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp); | |
1065 | } | |
1066 | ||
1067 | return true; | |
1068 | } | |
1069 | ||
1070 | /* Store disk device info specified by @sysfs into @fs */ | |
1071 | static void build_guest_fsinfo_for_real_device(char const *syspath, | |
1072 | GuestFilesystemInfo *fs, | |
1073 | Error **errp) | |
1074 | { | |
1075 | GuestDiskAddress *disk; | |
1076 | GuestPCIAddress *pciaddr; | |
1077 | bool has_hwinf; | |
1078 | #ifdef CONFIG_LIBUDEV | |
1079 | struct udev *udev = NULL; | |
1080 | struct udev_device *udevice = NULL; | |
1081 | #endif | |
1082 | ||
1083 | pciaddr = g_new0(GuestPCIAddress, 1); | |
1084 | pciaddr->domain = -1; /* -1 means field is invalid */ | |
1085 | pciaddr->bus = -1; | |
1086 | pciaddr->slot = -1; | |
1087 | pciaddr->function = -1; | |
1088 | ||
1089 | disk = g_new0(GuestDiskAddress, 1); | |
1090 | disk->pci_controller = pciaddr; | |
1091 | disk->bus_type = GUEST_DISK_BUS_TYPE_UNKNOWN; | |
1092 | ||
1093 | #ifdef CONFIG_LIBUDEV | |
1094 | udev = udev_new(); | |
1095 | udevice = udev_device_new_from_syspath(udev, syspath); | |
1096 | if (udev == NULL || udevice == NULL) { | |
1097 | g_debug("failed to query udev"); | |
1098 | } else { | |
1099 | const char *devnode, *serial; | |
1100 | devnode = udev_device_get_devnode(udevice); | |
1101 | if (devnode != NULL) { | |
1102 | disk->dev = g_strdup(devnode); | |
1103 | disk->has_dev = true; | |
1104 | } | |
1105 | serial = udev_device_get_property_value(udevice, "ID_SERIAL"); | |
1106 | if (serial != NULL && *serial != 0) { | |
1107 | disk->serial = g_strdup(serial); | |
1108 | disk->has_serial = true; | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | udev_unref(udev); | |
1113 | udev_device_unref(udevice); | |
1114 | #endif | |
1115 | ||
1116 | if (strstr(syspath, "/devices/pci")) { | |
1117 | has_hwinf = build_guest_fsinfo_for_pci_dev(syspath, disk, errp); | |
1118 | } else if (strstr(syspath, "/devices/css")) { | |
1119 | has_hwinf = build_guest_fsinfo_for_ccw_dev(syspath, disk, errp); | |
1120 | } else if (strstr(syspath, "/virtio")) { | |
1121 | has_hwinf = build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp); | |
1122 | } else { | |
1123 | g_debug("Unsupported device type for '%s'", syspath); | |
1124 | has_hwinf = false; | |
1125 | } | |
1126 | ||
1127 | if (has_hwinf || disk->has_dev || disk->has_serial) { | |
1128 | QAPI_LIST_PREPEND(fs->disk, disk); | |
1129 | } else { | |
1130 | qapi_free_GuestDiskAddress(disk); | |
1131 | } | |
1132 | } | |
1133 | ||
1134 | static void build_guest_fsinfo_for_device(char const *devpath, | |
1135 | GuestFilesystemInfo *fs, | |
1136 | Error **errp); | |
1137 | ||
1138 | /* Store a list of slave devices of virtual volume specified by @syspath into | |
1139 | * @fs */ | |
1140 | static void build_guest_fsinfo_for_virtual_device(char const *syspath, | |
1141 | GuestFilesystemInfo *fs, | |
1142 | Error **errp) | |
1143 | { | |
1144 | Error *err = NULL; | |
1145 | DIR *dir; | |
1146 | char *dirpath; | |
1147 | struct dirent *entry; | |
1148 | ||
1149 | dirpath = g_strdup_printf("%s/slaves", syspath); | |
1150 | dir = opendir(dirpath); | |
1151 | if (!dir) { | |
1152 | if (errno != ENOENT) { | |
1153 | error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath); | |
1154 | } | |
1155 | g_free(dirpath); | |
1156 | return; | |
1157 | } | |
1158 | ||
1159 | for (;;) { | |
1160 | errno = 0; | |
1161 | entry = readdir(dir); | |
1162 | if (entry == NULL) { | |
1163 | if (errno) { | |
1164 | error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath); | |
1165 | } | |
1166 | break; | |
1167 | } | |
1168 | ||
1169 | if (entry->d_type == DT_LNK) { | |
1170 | char *path; | |
1171 | ||
1172 | g_debug(" slave device '%s'", entry->d_name); | |
1173 | path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name); | |
1174 | build_guest_fsinfo_for_device(path, fs, &err); | |
1175 | g_free(path); | |
1176 | ||
1177 | if (err) { | |
1178 | error_propagate(errp, err); | |
1179 | break; | |
1180 | } | |
1181 | } | |
1182 | } | |
1183 | ||
1184 | g_free(dirpath); | |
1185 | closedir(dir); | |
1186 | } | |
1187 | ||
1188 | static bool is_disk_virtual(const char *devpath, Error **errp) | |
1189 | { | |
1190 | g_autofree char *syspath = realpath(devpath, NULL); | |
1191 | ||
1192 | if (!syspath) { | |
1193 | error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); | |
1194 | return false; | |
1195 | } | |
1196 | return strstr(syspath, "/devices/virtual/block/") != NULL; | |
1197 | } | |
1198 | ||
1199 | /* Dispatch to functions for virtual/real device */ | |
1200 | static void build_guest_fsinfo_for_device(char const *devpath, | |
1201 | GuestFilesystemInfo *fs, | |
1202 | Error **errp) | |
1203 | { | |
1204 | ERRP_GUARD(); | |
1205 | g_autofree char *syspath = NULL; | |
1206 | bool is_virtual = false; | |
1207 | ||
1208 | syspath = realpath(devpath, NULL); | |
1209 | if (!syspath) { | |
1210 | error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); | |
1211 | return; | |
1212 | } | |
1213 | ||
1214 | if (!fs->name) { | |
1215 | fs->name = g_path_get_basename(syspath); | |
1216 | } | |
1217 | ||
1218 | g_debug(" parse sysfs path '%s'", syspath); | |
1219 | is_virtual = is_disk_virtual(syspath, errp); | |
1220 | if (*errp != NULL) { | |
1221 | return; | |
1222 | } | |
1223 | if (is_virtual) { | |
1224 | build_guest_fsinfo_for_virtual_device(syspath, fs, errp); | |
1225 | } else { | |
1226 | build_guest_fsinfo_for_real_device(syspath, fs, errp); | |
1227 | } | |
1228 | } | |
1229 | ||
1230 | #ifdef CONFIG_LIBUDEV | |
1231 | ||
1232 | /* | |
1233 | * Wrapper around build_guest_fsinfo_for_device() for getting just | |
1234 | * the disk address. | |
1235 | */ | |
1236 | static GuestDiskAddress *get_disk_address(const char *syspath, Error **errp) | |
1237 | { | |
1238 | g_autoptr(GuestFilesystemInfo) fs = NULL; | |
1239 | ||
1240 | fs = g_new0(GuestFilesystemInfo, 1); | |
1241 | build_guest_fsinfo_for_device(syspath, fs, errp); | |
1242 | if (fs->disk != NULL) { | |
1243 | return g_steal_pointer(&fs->disk->value); | |
1244 | } | |
1245 | return NULL; | |
1246 | } | |
1247 | ||
1248 | static char *get_alias_for_syspath(const char *syspath) | |
1249 | { | |
1250 | struct udev *udev = NULL; | |
1251 | struct udev_device *udevice = NULL; | |
1252 | char *ret = NULL; | |
1253 | ||
1254 | udev = udev_new(); | |
1255 | if (udev == NULL) { | |
1256 | g_debug("failed to query udev"); | |
1257 | goto out; | |
1258 | } | |
1259 | udevice = udev_device_new_from_syspath(udev, syspath); | |
1260 | if (udevice == NULL) { | |
1261 | g_debug("failed to query udev for path: %s", syspath); | |
1262 | goto out; | |
1263 | } else { | |
1264 | const char *alias = udev_device_get_property_value( | |
1265 | udevice, "DM_NAME"); | |
1266 | /* | |
1267 | * NULL means there was an error and empty string means there is no | |
1268 | * alias. In case of no alias we return NULL instead of empty string. | |
1269 | */ | |
1270 | if (alias == NULL) { | |
1271 | g_debug("failed to query udev for device alias for: %s", | |
1272 | syspath); | |
1273 | } else if (*alias != 0) { | |
1274 | ret = g_strdup(alias); | |
1275 | } | |
1276 | } | |
1277 | ||
1278 | out: | |
1279 | udev_unref(udev); | |
1280 | udev_device_unref(udevice); | |
1281 | return ret; | |
1282 | } | |
1283 | ||
1284 | static char *get_device_for_syspath(const char *syspath) | |
1285 | { | |
1286 | struct udev *udev = NULL; | |
1287 | struct udev_device *udevice = NULL; | |
1288 | char *ret = NULL; | |
1289 | ||
1290 | udev = udev_new(); | |
1291 | if (udev == NULL) { | |
1292 | g_debug("failed to query udev"); | |
1293 | goto out; | |
1294 | } | |
1295 | udevice = udev_device_new_from_syspath(udev, syspath); | |
1296 | if (udevice == NULL) { | |
1297 | g_debug("failed to query udev for path: %s", syspath); | |
1298 | goto out; | |
1299 | } else { | |
1300 | ret = g_strdup(udev_device_get_devnode(udevice)); | |
1301 | } | |
1302 | ||
1303 | out: | |
1304 | udev_unref(udev); | |
1305 | udev_device_unref(udevice); | |
1306 | return ret; | |
1307 | } | |
1308 | ||
1309 | static void get_disk_deps(const char *disk_dir, GuestDiskInfo *disk) | |
1310 | { | |
1311 | g_autofree char *deps_dir = NULL; | |
1312 | const gchar *dep; | |
1313 | GDir *dp_deps = NULL; | |
1314 | ||
1315 | /* List dependent disks */ | |
1316 | deps_dir = g_strdup_printf("%s/slaves", disk_dir); | |
1317 | g_debug(" listing entries in: %s", deps_dir); | |
1318 | dp_deps = g_dir_open(deps_dir, 0, NULL); | |
1319 | if (dp_deps == NULL) { | |
1320 | g_debug("failed to list entries in %s", deps_dir); | |
1321 | return; | |
1322 | } | |
1323 | disk->has_dependencies = true; | |
1324 | while ((dep = g_dir_read_name(dp_deps)) != NULL) { | |
1325 | g_autofree char *dep_dir = NULL; | |
1326 | char *dev_name; | |
1327 | ||
1328 | /* Add dependent disks */ | |
1329 | dep_dir = g_strdup_printf("%s/%s", deps_dir, dep); | |
1330 | dev_name = get_device_for_syspath(dep_dir); | |
1331 | if (dev_name != NULL) { | |
1332 | g_debug(" adding dependent device: %s", dev_name); | |
1333 | QAPI_LIST_PREPEND(disk->dependencies, dev_name); | |
1334 | } | |
1335 | } | |
1336 | g_dir_close(dp_deps); | |
1337 | } | |
1338 | ||
1339 | /* | |
1340 | * Detect partitions subdirectory, name is "<disk_name><number>" or | |
1341 | * "<disk_name>p<number>" | |
1342 | * | |
1343 | * @disk_name -- last component of /sys path (e.g. sda) | |
1344 | * @disk_dir -- sys path of the disk (e.g. /sys/block/sda) | |
1345 | * @disk_dev -- device node of the disk (e.g. /dev/sda) | |
1346 | */ | |
1347 | static GuestDiskInfoList *get_disk_partitions( | |
1348 | GuestDiskInfoList *list, | |
1349 | const char *disk_name, const char *disk_dir, | |
1350 | const char *disk_dev) | |
1351 | { | |
1352 | GuestDiskInfoList *ret = list; | |
1353 | struct dirent *de_disk; | |
1354 | DIR *dp_disk = NULL; | |
1355 | size_t len = strlen(disk_name); | |
1356 | ||
1357 | dp_disk = opendir(disk_dir); | |
1358 | while ((de_disk = readdir(dp_disk)) != NULL) { | |
1359 | g_autofree char *partition_dir = NULL; | |
1360 | char *dev_name; | |
1361 | GuestDiskInfo *partition; | |
1362 | ||
1363 | if (!(de_disk->d_type & DT_DIR)) { | |
1364 | continue; | |
1365 | } | |
1366 | ||
1367 | if (!(strncmp(disk_name, de_disk->d_name, len) == 0 && | |
1368 | ((*(de_disk->d_name + len) == 'p' && | |
1369 | isdigit(*(de_disk->d_name + len + 1))) || | |
1370 | isdigit(*(de_disk->d_name + len))))) { | |
1371 | continue; | |
1372 | } | |
1373 | ||
1374 | partition_dir = g_strdup_printf("%s/%s", | |
1375 | disk_dir, de_disk->d_name); | |
1376 | dev_name = get_device_for_syspath(partition_dir); | |
1377 | if (dev_name == NULL) { | |
1378 | g_debug("Failed to get device name for syspath: %s", | |
1379 | disk_dir); | |
1380 | continue; | |
1381 | } | |
1382 | partition = g_new0(GuestDiskInfo, 1); | |
1383 | partition->name = dev_name; | |
1384 | partition->partition = true; | |
1385 | partition->has_dependencies = true; | |
1386 | /* Add parent disk as dependent for easier tracking of hierarchy */ | |
1387 | QAPI_LIST_PREPEND(partition->dependencies, g_strdup(disk_dev)); | |
1388 | ||
1389 | QAPI_LIST_PREPEND(ret, partition); | |
1390 | } | |
1391 | closedir(dp_disk); | |
1392 | ||
1393 | return ret; | |
1394 | } | |
1395 | ||
1396 | static void get_nvme_smart(GuestDiskInfo *disk) | |
1397 | { | |
1398 | int fd; | |
1399 | GuestNVMeSmart *smart; | |
1400 | NvmeSmartLog log = {0}; | |
1401 | struct nvme_admin_cmd cmd = { | |
1402 | .opcode = NVME_ADM_CMD_GET_LOG_PAGE, | |
1403 | .nsid = NVME_NSID_BROADCAST, | |
1404 | .addr = (uintptr_t)&log, | |
1405 | .data_len = sizeof(log), | |
1406 | .cdw10 = NVME_LOG_SMART_INFO | (1 << 15) /* RAE bit */ | |
1407 | | (((sizeof(log) >> 2) - 1) << 16) | |
1408 | }; | |
1409 | ||
1410 | fd = qga_open_cloexec(disk->name, O_RDONLY, 0); | |
1411 | if (fd == -1) { | |
1412 | g_debug("Failed to open device: %s: %s", disk->name, g_strerror(errno)); | |
1413 | return; | |
1414 | } | |
1415 | ||
1416 | if (ioctl(fd, NVME_IOCTL_ADMIN_CMD, &cmd)) { | |
1417 | g_debug("Failed to get smart: %s: %s", disk->name, g_strerror(errno)); | |
1418 | close(fd); | |
1419 | return; | |
1420 | } | |
1421 | ||
1422 | disk->has_smart = true; | |
1423 | disk->smart = g_new0(GuestDiskSmart, 1); | |
1424 | disk->smart->type = GUEST_DISK_BUS_TYPE_NVME; | |
1425 | ||
1426 | smart = &disk->smart->u.nvme; | |
1427 | smart->critical_warning = log.critical_warning; | |
1428 | smart->temperature = lduw_le_p(&log.temperature); /* unaligned field */ | |
1429 | smart->available_spare = log.available_spare; | |
1430 | smart->available_spare_threshold = log.available_spare_threshold; | |
1431 | smart->percentage_used = log.percentage_used; | |
1432 | smart->data_units_read_lo = le64_to_cpu(log.data_units_read[0]); | |
1433 | smart->data_units_read_hi = le64_to_cpu(log.data_units_read[1]); | |
1434 | smart->data_units_written_lo = le64_to_cpu(log.data_units_written[0]); | |
1435 | smart->data_units_written_hi = le64_to_cpu(log.data_units_written[1]); | |
1436 | smart->host_read_commands_lo = le64_to_cpu(log.host_read_commands[0]); | |
1437 | smart->host_read_commands_hi = le64_to_cpu(log.host_read_commands[1]); | |
1438 | smart->host_write_commands_lo = le64_to_cpu(log.host_write_commands[0]); | |
1439 | smart->host_write_commands_hi = le64_to_cpu(log.host_write_commands[1]); | |
1440 | smart->controller_busy_time_lo = le64_to_cpu(log.controller_busy_time[0]); | |
1441 | smart->controller_busy_time_hi = le64_to_cpu(log.controller_busy_time[1]); | |
1442 | smart->power_cycles_lo = le64_to_cpu(log.power_cycles[0]); | |
1443 | smart->power_cycles_hi = le64_to_cpu(log.power_cycles[1]); | |
1444 | smart->power_on_hours_lo = le64_to_cpu(log.power_on_hours[0]); | |
1445 | smart->power_on_hours_hi = le64_to_cpu(log.power_on_hours[1]); | |
1446 | smart->unsafe_shutdowns_lo = le64_to_cpu(log.unsafe_shutdowns[0]); | |
1447 | smart->unsafe_shutdowns_hi = le64_to_cpu(log.unsafe_shutdowns[1]); | |
1448 | smart->media_errors_lo = le64_to_cpu(log.media_errors[0]); | |
1449 | smart->media_errors_hi = le64_to_cpu(log.media_errors[1]); | |
1450 | smart->number_of_error_log_entries_lo = | |
1451 | le64_to_cpu(log.number_of_error_log_entries[0]); | |
1452 | smart->number_of_error_log_entries_hi = | |
1453 | le64_to_cpu(log.number_of_error_log_entries[1]); | |
1454 | ||
1455 | close(fd); | |
1456 | } | |
1457 | ||
1458 | static void get_disk_smart(GuestDiskInfo *disk) | |
1459 | { | |
1460 | if (disk->has_address | |
1461 | && (disk->address->bus_type == GUEST_DISK_BUS_TYPE_NVME)) { | |
1462 | get_nvme_smart(disk); | |
1463 | } | |
1464 | } | |
1465 | ||
1466 | GuestDiskInfoList *qmp_guest_get_disks(Error **errp) | |
1467 | { | |
1468 | GuestDiskInfoList *ret = NULL; | |
1469 | GuestDiskInfo *disk; | |
1470 | DIR *dp = NULL; | |
1471 | struct dirent *de = NULL; | |
1472 | ||
1473 | g_debug("listing /sys/block directory"); | |
1474 | dp = opendir("/sys/block"); | |
1475 | if (dp == NULL) { | |
1476 | error_setg_errno(errp, errno, "Can't open directory \"/sys/block\""); | |
1477 | return NULL; | |
1478 | } | |
1479 | while ((de = readdir(dp)) != NULL) { | |
1480 | g_autofree char *disk_dir = NULL, *line = NULL, | |
1481 | *size_path = NULL; | |
1482 | char *dev_name; | |
1483 | Error *local_err = NULL; | |
1484 | if (de->d_type != DT_LNK) { | |
1485 | g_debug(" skipping entry: %s", de->d_name); | |
1486 | continue; | |
1487 | } | |
1488 | ||
1489 | /* Check size and skip zero-sized disks */ | |
1490 | g_debug(" checking disk size"); | |
1491 | size_path = g_strdup_printf("/sys/block/%s/size", de->d_name); | |
1492 | if (!g_file_get_contents(size_path, &line, NULL, NULL)) { | |
1493 | g_debug(" failed to read disk size"); | |
1494 | continue; | |
1495 | } | |
1496 | if (g_strcmp0(line, "0\n") == 0) { | |
1497 | g_debug(" skipping zero-sized disk"); | |
1498 | continue; | |
1499 | } | |
1500 | ||
1501 | g_debug(" adding %s", de->d_name); | |
1502 | disk_dir = g_strdup_printf("/sys/block/%s", de->d_name); | |
1503 | dev_name = get_device_for_syspath(disk_dir); | |
1504 | if (dev_name == NULL) { | |
1505 | g_debug("Failed to get device name for syspath: %s", | |
1506 | disk_dir); | |
1507 | continue; | |
1508 | } | |
1509 | disk = g_new0(GuestDiskInfo, 1); | |
1510 | disk->name = dev_name; | |
1511 | disk->partition = false; | |
1512 | disk->alias = get_alias_for_syspath(disk_dir); | |
1513 | disk->has_alias = (disk->alias != NULL); | |
1514 | QAPI_LIST_PREPEND(ret, disk); | |
1515 | ||
1516 | /* Get address for non-virtual devices */ | |
1517 | bool is_virtual = is_disk_virtual(disk_dir, &local_err); | |
1518 | if (local_err != NULL) { | |
1519 | g_debug(" failed to check disk path, ignoring error: %s", | |
1520 | error_get_pretty(local_err)); | |
1521 | error_free(local_err); | |
1522 | local_err = NULL; | |
1523 | /* Don't try to get the address */ | |
1524 | is_virtual = true; | |
1525 | } | |
1526 | if (!is_virtual) { | |
1527 | disk->address = get_disk_address(disk_dir, &local_err); | |
1528 | if (local_err != NULL) { | |
1529 | g_debug(" failed to get device info, ignoring error: %s", | |
1530 | error_get_pretty(local_err)); | |
1531 | error_free(local_err); | |
1532 | local_err = NULL; | |
1533 | } else if (disk->address != NULL) { | |
1534 | disk->has_address = true; | |
1535 | } | |
1536 | } | |
1537 | ||
1538 | get_disk_deps(disk_dir, disk); | |
1539 | get_disk_smart(disk); | |
1540 | ret = get_disk_partitions(ret, de->d_name, disk_dir, dev_name); | |
1541 | } | |
1542 | ||
1543 | closedir(dp); | |
1544 | ||
1545 | return ret; | |
1546 | } | |
1547 | ||
1548 | #else | |
1549 | ||
1550 | GuestDiskInfoList *qmp_guest_get_disks(Error **errp) | |
1551 | { | |
1552 | error_setg(errp, QERR_UNSUPPORTED); | |
1553 | return NULL; | |
1554 | } | |
1555 | ||
1556 | #endif | |
1557 | ||
1558 | /* Return a list of the disk device(s)' info which @mount lies on */ | |
1559 | static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount, | |
1560 | Error **errp) | |
1561 | { | |
1562 | GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs)); | |
1563 | struct statvfs buf; | |
1564 | unsigned long used, nonroot_total, fr_size; | |
1565 | char *devpath = g_strdup_printf("/sys/dev/block/%u:%u", | |
1566 | mount->devmajor, mount->devminor); | |
1567 | ||
1568 | fs->mountpoint = g_strdup(mount->dirname); | |
1569 | fs->type = g_strdup(mount->devtype); | |
1570 | build_guest_fsinfo_for_device(devpath, fs, errp); | |
1571 | ||
1572 | if (statvfs(fs->mountpoint, &buf) == 0) { | |
1573 | fr_size = buf.f_frsize; | |
1574 | used = buf.f_blocks - buf.f_bfree; | |
1575 | nonroot_total = used + buf.f_bavail; | |
1576 | fs->used_bytes = used * fr_size; | |
1577 | fs->total_bytes = nonroot_total * fr_size; | |
1578 | ||
1579 | fs->has_total_bytes = true; | |
1580 | fs->has_used_bytes = true; | |
1581 | } | |
1582 | ||
1583 | g_free(devpath); | |
1584 | ||
1585 | return fs; | |
1586 | } | |
1587 | ||
1588 | GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) | |
1589 | { | |
1590 | FsMountList mounts; | |
1591 | struct FsMount *mount; | |
1592 | GuestFilesystemInfoList *ret = NULL; | |
1593 | Error *local_err = NULL; | |
1594 | ||
1595 | QTAILQ_INIT(&mounts); | |
1596 | if (!build_fs_mount_list(&mounts, &local_err)) { | |
1597 | error_propagate(errp, local_err); | |
1598 | return NULL; | |
1599 | } | |
1600 | ||
1601 | QTAILQ_FOREACH(mount, &mounts, next) { | |
1602 | g_debug("Building guest fsinfo for '%s'", mount->dirname); | |
1603 | ||
1604 | QAPI_LIST_PREPEND(ret, build_guest_fsinfo(mount, &local_err)); | |
1605 | if (local_err) { | |
1606 | error_propagate(errp, local_err); | |
1607 | qapi_free_GuestFilesystemInfoList(ret); | |
1608 | ret = NULL; | |
1609 | break; | |
1610 | } | |
1611 | } | |
1612 | ||
1613 | free_fs_mount_list(&mounts); | |
1614 | return ret; | |
1615 | } | |
1616 | ||
1617 | ||
1618 | typedef enum { | |
1619 | FSFREEZE_HOOK_THAW = 0, | |
1620 | FSFREEZE_HOOK_FREEZE, | |
1621 | } FsfreezeHookArg; | |
1622 | ||
1623 | static const char *fsfreeze_hook_arg_string[] = { | |
1624 | "thaw", | |
1625 | "freeze", | |
1626 | }; | |
1627 | ||
1628 | static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **errp) | |
1629 | { | |
1630 | int status; | |
1631 | pid_t pid; | |
1632 | const char *hook; | |
1633 | const char *arg_str = fsfreeze_hook_arg_string[arg]; | |
1634 | Error *local_err = NULL; | |
1635 | ||
1636 | hook = ga_fsfreeze_hook(ga_state); | |
1637 | if (!hook) { | |
1638 | return; | |
1639 | } | |
1640 | if (access(hook, X_OK) != 0) { | |
1641 | error_setg_errno(errp, errno, "can't access fsfreeze hook '%s'", hook); | |
1642 | return; | |
1643 | } | |
1644 | ||
1645 | slog("executing fsfreeze hook with arg '%s'", arg_str); | |
1646 | pid = fork(); | |
1647 | if (pid == 0) { | |
1648 | setsid(); | |
1649 | reopen_fd_to_null(0); | |
1650 | reopen_fd_to_null(1); | |
1651 | reopen_fd_to_null(2); | |
1652 | ||
1653 | execl(hook, hook, arg_str, NULL); | |
1654 | _exit(EXIT_FAILURE); | |
1655 | } else if (pid < 0) { | |
1656 | error_setg_errno(errp, errno, "failed to create child process"); | |
1657 | return; | |
1658 | } | |
1659 | ||
1660 | ga_wait_child(pid, &status, &local_err); | |
1661 | if (local_err) { | |
1662 | error_propagate(errp, local_err); | |
1663 | return; | |
1664 | } | |
1665 | ||
1666 | if (!WIFEXITED(status)) { | |
1667 | error_setg(errp, "fsfreeze hook has terminated abnormally"); | |
1668 | return; | |
1669 | } | |
1670 | ||
1671 | status = WEXITSTATUS(status); | |
1672 | if (status) { | |
1673 | error_setg(errp, "fsfreeze hook has failed with status %d", status); | |
1674 | return; | |
1675 | } | |
1676 | } | |
1677 | ||
1678 | /* | |
1679 | * Return status of freeze/thaw | |
1680 | */ | |
1681 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp) | |
1682 | { | |
1683 | if (ga_is_frozen(ga_state)) { | |
1684 | return GUEST_FSFREEZE_STATUS_FROZEN; | |
1685 | } | |
1686 | ||
1687 | return GUEST_FSFREEZE_STATUS_THAWED; | |
1688 | } | |
1689 | ||
1690 | int64_t qmp_guest_fsfreeze_freeze(Error **errp) | |
1691 | { | |
1692 | return qmp_guest_fsfreeze_freeze_list(false, NULL, errp); | |
1693 | } | |
1694 | ||
1695 | /* | |
1696 | * Walk list of mounted file systems in the guest, and freeze the ones which | |
1697 | * are real local file systems. | |
1698 | */ | |
1699 | int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints, | |
1700 | strList *mountpoints, | |
1701 | Error **errp) | |
1702 | { | |
1703 | int ret = 0, i = 0; | |
1704 | strList *list; | |
1705 | FsMountList mounts; | |
1706 | struct FsMount *mount; | |
1707 | Error *local_err = NULL; | |
1708 | int fd; | |
1709 | ||
1710 | slog("guest-fsfreeze called"); | |
1711 | ||
1712 | execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err); | |
1713 | if (local_err) { | |
1714 | error_propagate(errp, local_err); | |
1715 | return -1; | |
1716 | } | |
1717 | ||
1718 | QTAILQ_INIT(&mounts); | |
1719 | if (!build_fs_mount_list(&mounts, &local_err)) { | |
1720 | error_propagate(errp, local_err); | |
1721 | return -1; | |
1722 | } | |
1723 | ||
1724 | /* cannot risk guest agent blocking itself on a write in this state */ | |
1725 | ga_set_frozen(ga_state); | |
1726 | ||
1727 | QTAILQ_FOREACH_REVERSE(mount, &mounts, next) { | |
1728 | /* To issue fsfreeze in the reverse order of mounts, check if the | |
1729 | * mount is listed in the list here */ | |
1730 | if (has_mountpoints) { | |
1731 | for (list = mountpoints; list; list = list->next) { | |
1732 | if (strcmp(list->value, mount->dirname) == 0) { | |
1733 | break; | |
1734 | } | |
1735 | } | |
1736 | if (!list) { | |
1737 | continue; | |
1738 | } | |
1739 | } | |
1740 | ||
1741 | fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); | |
1742 | if (fd == -1) { | |
1743 | error_setg_errno(errp, errno, "failed to open %s", mount->dirname); | |
1744 | goto error; | |
1745 | } | |
1746 | ||
1747 | /* we try to cull filesystems we know won't work in advance, but other | |
1748 | * filesystems may not implement fsfreeze for less obvious reasons. | |
1749 | * these will report EOPNOTSUPP. we simply ignore these when tallying | |
1750 | * the number of frozen filesystems. | |
1751 | * if a filesystem is mounted more than once (aka bind mount) a | |
1752 | * consecutive attempt to freeze an already frozen filesystem will | |
1753 | * return EBUSY. | |
1754 | * | |
1755 | * any other error means a failure to freeze a filesystem we | |
1756 | * expect to be freezable, so return an error in those cases | |
1757 | * and return system to thawed state. | |
1758 | */ | |
1759 | ret = ioctl(fd, FIFREEZE); | |
1760 | if (ret == -1) { | |
1761 | if (errno != EOPNOTSUPP && errno != EBUSY) { | |
1762 | error_setg_errno(errp, errno, "failed to freeze %s", | |
1763 | mount->dirname); | |
1764 | close(fd); | |
1765 | goto error; | |
1766 | } | |
1767 | } else { | |
1768 | i++; | |
1769 | } | |
1770 | close(fd); | |
1771 | } | |
1772 | ||
1773 | free_fs_mount_list(&mounts); | |
1774 | /* We may not issue any FIFREEZE here. | |
1775 | * Just unset ga_state here and ready for the next call. | |
1776 | */ | |
1777 | if (i == 0) { | |
1778 | ga_unset_frozen(ga_state); | |
1779 | } | |
1780 | return i; | |
1781 | ||
1782 | error: | |
1783 | free_fs_mount_list(&mounts); | |
1784 | qmp_guest_fsfreeze_thaw(NULL); | |
1785 | return 0; | |
1786 | } | |
1787 | ||
1788 | /* | |
1789 | * Walk list of frozen file systems in the guest, and thaw them. | |
1790 | */ | |
1791 | int64_t qmp_guest_fsfreeze_thaw(Error **errp) | |
1792 | { | |
1793 | int ret; | |
1794 | FsMountList mounts; | |
1795 | FsMount *mount; | |
1796 | int fd, i = 0, logged; | |
1797 | Error *local_err = NULL; | |
1798 | ||
1799 | QTAILQ_INIT(&mounts); | |
1800 | if (!build_fs_mount_list(&mounts, &local_err)) { | |
1801 | error_propagate(errp, local_err); | |
1802 | return 0; | |
1803 | } | |
1804 | ||
1805 | QTAILQ_FOREACH(mount, &mounts, next) { | |
1806 | logged = false; | |
1807 | fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); | |
1808 | if (fd == -1) { | |
1809 | continue; | |
1810 | } | |
1811 | /* we have no way of knowing whether a filesystem was actually unfrozen | |
1812 | * as a result of a successful call to FITHAW, only that if an error | |
1813 | * was returned the filesystem was *not* unfrozen by that particular | |
1814 | * call. | |
1815 | * | |
1816 | * since multiple preceding FIFREEZEs require multiple calls to FITHAW | |
1817 | * to unfreeze, continuing issuing FITHAW until an error is returned, | |
1818 | * in which case either the filesystem is in an unfreezable state, or, | |
1819 | * more likely, it was thawed previously (and remains so afterward). | |
1820 | * | |
1821 | * also, since the most recent successful call is the one that did | |
1822 | * the actual unfreeze, we can use this to provide an accurate count | |
1823 | * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which | |
1824 | * may * be useful for determining whether a filesystem was unfrozen | |
1825 | * during the freeze/thaw phase by a process other than qemu-ga. | |
1826 | */ | |
1827 | do { | |
1828 | ret = ioctl(fd, FITHAW); | |
1829 | if (ret == 0 && !logged) { | |
1830 | i++; | |
1831 | logged = true; | |
1832 | } | |
1833 | } while (ret == 0); | |
1834 | close(fd); | |
1835 | } | |
1836 | ||
1837 | ga_unset_frozen(ga_state); | |
1838 | free_fs_mount_list(&mounts); | |
1839 | ||
1840 | execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, errp); | |
1841 | ||
1842 | return i; | |
1843 | } | |
1844 | ||
1845 | static void guest_fsfreeze_cleanup(void) | |
1846 | { | |
1847 | Error *err = NULL; | |
1848 | ||
1849 | if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) { | |
1850 | qmp_guest_fsfreeze_thaw(&err); | |
1851 | if (err) { | |
1852 | slog("failed to clean up frozen filesystems: %s", | |
1853 | error_get_pretty(err)); | |
1854 | error_free(err); | |
1855 | } | |
1856 | } | |
1857 | } | |
1858 | #endif /* CONFIG_FSFREEZE */ | |
1859 | ||
1860 | #if defined(CONFIG_FSTRIM) | |
1861 | /* | |
1862 | * Walk list of mounted file systems in the guest, and trim them. | |
1863 | */ | |
1864 | GuestFilesystemTrimResponse * | |
1865 | qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) | |
1866 | { | |
1867 | GuestFilesystemTrimResponse *response; | |
1868 | GuestFilesystemTrimResult *result; | |
1869 | int ret = 0; | |
1870 | FsMountList mounts; | |
1871 | struct FsMount *mount; | |
1872 | int fd; | |
1873 | struct fstrim_range r; | |
1874 | ||
1875 | slog("guest-fstrim called"); | |
1876 | ||
1877 | QTAILQ_INIT(&mounts); | |
1878 | if (!build_fs_mount_list(&mounts, errp)) { | |
1879 | return NULL; | |
1880 | } | |
1881 | ||
1882 | response = g_malloc0(sizeof(*response)); | |
1883 | ||
1884 | QTAILQ_FOREACH(mount, &mounts, next) { | |
1885 | result = g_malloc0(sizeof(*result)); | |
1886 | result->path = g_strdup(mount->dirname); | |
1887 | ||
1888 | QAPI_LIST_PREPEND(response->paths, result); | |
1889 | ||
1890 | fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); | |
1891 | if (fd == -1) { | |
1892 | result->error = g_strdup_printf("failed to open: %s", | |
1893 | strerror(errno)); | |
1894 | result->has_error = true; | |
1895 | continue; | |
1896 | } | |
1897 | ||
1898 | /* We try to cull filesystems we know won't work in advance, but other | |
1899 | * filesystems may not implement fstrim for less obvious reasons. | |
1900 | * These will report EOPNOTSUPP; while in some other cases ENOTTY | |
1901 | * will be reported (e.g. CD-ROMs). | |
1902 | * Any other error means an unexpected error. | |
1903 | */ | |
1904 | r.start = 0; | |
1905 | r.len = -1; | |
1906 | r.minlen = has_minimum ? minimum : 0; | |
1907 | ret = ioctl(fd, FITRIM, &r); | |
1908 | if (ret == -1) { | |
1909 | result->has_error = true; | |
1910 | if (errno == ENOTTY || errno == EOPNOTSUPP) { | |
1911 | result->error = g_strdup("trim not supported"); | |
1912 | } else { | |
1913 | result->error = g_strdup_printf("failed to trim: %s", | |
1914 | strerror(errno)); | |
1915 | } | |
1916 | close(fd); | |
1917 | continue; | |
1918 | } | |
1919 | ||
1920 | result->has_minimum = true; | |
1921 | result->minimum = r.minlen; | |
1922 | result->has_trimmed = true; | |
1923 | result->trimmed = r.len; | |
1924 | close(fd); | |
1925 | } | |
1926 | ||
1927 | free_fs_mount_list(&mounts); | |
1928 | return response; | |
1929 | } | |
1930 | #endif /* CONFIG_FSTRIM */ | |
1931 | ||
1932 | ||
1933 | #define LINUX_SYS_STATE_FILE "/sys/power/state" | |
1934 | #define SUSPEND_SUPPORTED 0 | |
1935 | #define SUSPEND_NOT_SUPPORTED 1 | |
1936 | ||
1937 | typedef enum { | |
1938 | SUSPEND_MODE_DISK = 0, | |
1939 | SUSPEND_MODE_RAM = 1, | |
1940 | SUSPEND_MODE_HYBRID = 2, | |
1941 | } SuspendMode; | |
1942 | ||
1943 | /* | |
1944 | * Executes a command in a child process using g_spawn_sync, | |
1945 | * returning an int >= 0 representing the exit status of the | |
1946 | * process. | |
1947 | * | |
1948 | * If the program wasn't found in path, returns -1. | |
1949 | * | |
1950 | * If a problem happened when creating the child process, | |
1951 | * returns -1 and errp is set. | |
1952 | */ | |
1953 | static int run_process_child(const char *command[], Error **errp) | |
1954 | { | |
1955 | int exit_status, spawn_flag; | |
1956 | GError *g_err = NULL; | |
1957 | bool success; | |
1958 | ||
1959 | spawn_flag = G_SPAWN_SEARCH_PATH | G_SPAWN_STDOUT_TO_DEV_NULL | | |
1960 | G_SPAWN_STDERR_TO_DEV_NULL; | |
1961 | ||
1962 | success = g_spawn_sync(NULL, (char **)command, NULL, spawn_flag, | |
1963 | NULL, NULL, NULL, NULL, | |
1964 | &exit_status, &g_err); | |
1965 | ||
1966 | if (success) { | |
1967 | return WEXITSTATUS(exit_status); | |
1968 | } | |
1969 | ||
1970 | if (g_err && (g_err->code != G_SPAWN_ERROR_NOENT)) { | |
1971 | error_setg(errp, "failed to create child process, error '%s'", | |
1972 | g_err->message); | |
1973 | } | |
1974 | ||
1975 | g_error_free(g_err); | |
1976 | return -1; | |
1977 | } | |
1978 | ||
1979 | static bool systemd_supports_mode(SuspendMode mode, Error **errp) | |
1980 | { | |
1981 | const char *systemctl_args[3] = {"systemd-hibernate", "systemd-suspend", | |
1982 | "systemd-hybrid-sleep"}; | |
1983 | const char *cmd[4] = {"systemctl", "status", systemctl_args[mode], NULL}; | |
1984 | int status; | |
1985 | ||
1986 | status = run_process_child(cmd, errp); | |
1987 | ||
1988 | /* | |
1989 | * systemctl status uses LSB return codes so we can expect | |
1990 | * status > 0 and be ok. To assert if the guest has support | |
1991 | * for the selected suspend mode, status should be < 4. 4 is | |
1992 | * the code for unknown service status, the return value when | |
1993 | * the service does not exist. A common value is status = 3 | |
1994 | * (program is not running). | |
1995 | */ | |
1996 | if (status > 0 && status < 4) { | |
1997 | return true; | |
1998 | } | |
1999 | ||
2000 | return false; | |
2001 | } | |
2002 | ||
2003 | static void systemd_suspend(SuspendMode mode, Error **errp) | |
2004 | { | |
2005 | Error *local_err = NULL; | |
2006 | const char *systemctl_args[3] = {"hibernate", "suspend", "hybrid-sleep"}; | |
2007 | const char *cmd[3] = {"systemctl", systemctl_args[mode], NULL}; | |
2008 | int status; | |
2009 | ||
2010 | status = run_process_child(cmd, &local_err); | |
2011 | ||
2012 | if (status == 0) { | |
2013 | return; | |
2014 | } | |
2015 | ||
2016 | if ((status == -1) && !local_err) { | |
2017 | error_setg(errp, "the helper program 'systemctl %s' was not found", | |
2018 | systemctl_args[mode]); | |
2019 | return; | |
2020 | } | |
2021 | ||
2022 | if (local_err) { | |
2023 | error_propagate(errp, local_err); | |
2024 | } else { | |
2025 | error_setg(errp, "the helper program 'systemctl %s' returned an " | |
2026 | "unexpected exit status code (%d)", | |
2027 | systemctl_args[mode], status); | |
2028 | } | |
2029 | } | |
2030 | ||
2031 | static bool pmutils_supports_mode(SuspendMode mode, Error **errp) | |
2032 | { | |
2033 | Error *local_err = NULL; | |
2034 | const char *pmutils_args[3] = {"--hibernate", "--suspend", | |
2035 | "--suspend-hybrid"}; | |
2036 | const char *cmd[3] = {"pm-is-supported", pmutils_args[mode], NULL}; | |
2037 | int status; | |
2038 | ||
2039 | status = run_process_child(cmd, &local_err); | |
2040 | ||
2041 | if (status == SUSPEND_SUPPORTED) { | |
2042 | return true; | |
2043 | } | |
2044 | ||
2045 | if ((status == -1) && !local_err) { | |
2046 | return false; | |
2047 | } | |
2048 | ||
2049 | if (local_err) { | |
2050 | error_propagate(errp, local_err); | |
2051 | } else { | |
2052 | error_setg(errp, | |
2053 | "the helper program '%s' returned an unexpected exit" | |
2054 | " status code (%d)", "pm-is-supported", status); | |
2055 | } | |
2056 | ||
2057 | return false; | |
2058 | } | |
2059 | ||
2060 | static void pmutils_suspend(SuspendMode mode, Error **errp) | |
2061 | { | |
2062 | Error *local_err = NULL; | |
2063 | const char *pmutils_binaries[3] = {"pm-hibernate", "pm-suspend", | |
2064 | "pm-suspend-hybrid"}; | |
2065 | const char *cmd[2] = {pmutils_binaries[mode], NULL}; | |
2066 | int status; | |
2067 | ||
2068 | status = run_process_child(cmd, &local_err); | |
2069 | ||
2070 | if (status == 0) { | |
2071 | return; | |
2072 | } | |
2073 | ||
2074 | if ((status == -1) && !local_err) { | |
2075 | error_setg(errp, "the helper program '%s' was not found", | |
2076 | pmutils_binaries[mode]); | |
2077 | return; | |
2078 | } | |
2079 | ||
2080 | if (local_err) { | |
2081 | error_propagate(errp, local_err); | |
2082 | } else { | |
2083 | error_setg(errp, | |
2084 | "the helper program '%s' returned an unexpected exit" | |
2085 | " status code (%d)", pmutils_binaries[mode], status); | |
2086 | } | |
2087 | } | |
2088 | ||
2089 | static bool linux_sys_state_supports_mode(SuspendMode mode, Error **errp) | |
2090 | { | |
2091 | const char *sysfile_strs[3] = {"disk", "mem", NULL}; | |
2092 | const char *sysfile_str = sysfile_strs[mode]; | |
2093 | char buf[32]; /* hopefully big enough */ | |
2094 | int fd; | |
2095 | ssize_t ret; | |
2096 | ||
2097 | if (!sysfile_str) { | |
2098 | error_setg(errp, "unknown guest suspend mode"); | |
2099 | return false; | |
2100 | } | |
2101 | ||
2102 | fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); | |
2103 | if (fd < 0) { | |
2104 | return false; | |
2105 | } | |
2106 | ||
2107 | ret = read(fd, buf, sizeof(buf) - 1); | |
2108 | close(fd); | |
2109 | if (ret <= 0) { | |
2110 | return false; | |
2111 | } | |
2112 | buf[ret] = '\0'; | |
2113 | ||
2114 | if (strstr(buf, sysfile_str)) { | |
2115 | return true; | |
2116 | } | |
2117 | return false; | |
2118 | } | |
2119 | ||
2120 | static void linux_sys_state_suspend(SuspendMode mode, Error **errp) | |
2121 | { | |
2122 | Error *local_err = NULL; | |
2123 | const char *sysfile_strs[3] = {"disk", "mem", NULL}; | |
2124 | const char *sysfile_str = sysfile_strs[mode]; | |
2125 | pid_t pid; | |
2126 | int status; | |
2127 | ||
2128 | if (!sysfile_str) { | |
2129 | error_setg(errp, "unknown guest suspend mode"); | |
2130 | return; | |
2131 | } | |
2132 | ||
2133 | pid = fork(); | |
2134 | if (!pid) { | |
2135 | /* child */ | |
2136 | int fd; | |
2137 | ||
2138 | setsid(); | |
2139 | reopen_fd_to_null(0); | |
2140 | reopen_fd_to_null(1); | |
2141 | reopen_fd_to_null(2); | |
2142 | ||
2143 | fd = open(LINUX_SYS_STATE_FILE, O_WRONLY); | |
2144 | if (fd < 0) { | |
2145 | _exit(EXIT_FAILURE); | |
2146 | } | |
2147 | ||
2148 | if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) { | |
2149 | _exit(EXIT_FAILURE); | |
2150 | } | |
2151 | ||
2152 | _exit(EXIT_SUCCESS); | |
2153 | } else if (pid < 0) { | |
2154 | error_setg_errno(errp, errno, "failed to create child process"); | |
2155 | return; | |
2156 | } | |
2157 | ||
2158 | ga_wait_child(pid, &status, &local_err); | |
2159 | if (local_err) { | |
2160 | error_propagate(errp, local_err); | |
2161 | return; | |
2162 | } | |
2163 | ||
2164 | if (WEXITSTATUS(status)) { | |
2165 | error_setg(errp, "child process has failed to suspend"); | |
2166 | } | |
2167 | ||
2168 | } | |
2169 | ||
2170 | static void guest_suspend(SuspendMode mode, Error **errp) | |
2171 | { | |
2172 | Error *local_err = NULL; | |
2173 | bool mode_supported = false; | |
2174 | ||
2175 | if (systemd_supports_mode(mode, &local_err)) { | |
2176 | mode_supported = true; | |
2177 | systemd_suspend(mode, &local_err); | |
2178 | } | |
2179 | ||
2180 | if (!local_err) { | |
2181 | return; | |
2182 | } | |
2183 | ||
2184 | error_free(local_err); | |
2185 | local_err = NULL; | |
2186 | ||
2187 | if (pmutils_supports_mode(mode, &local_err)) { | |
2188 | mode_supported = true; | |
2189 | pmutils_suspend(mode, &local_err); | |
2190 | } | |
2191 | ||
2192 | if (!local_err) { | |
2193 | return; | |
2194 | } | |
2195 | ||
2196 | error_free(local_err); | |
2197 | local_err = NULL; | |
2198 | ||
2199 | if (linux_sys_state_supports_mode(mode, &local_err)) { | |
2200 | mode_supported = true; | |
2201 | linux_sys_state_suspend(mode, &local_err); | |
2202 | } | |
2203 | ||
2204 | if (!mode_supported) { | |
2205 | error_free(local_err); | |
2206 | error_setg(errp, | |
2207 | "the requested suspend mode is not supported by the guest"); | |
2208 | } else { | |
2209 | error_propagate(errp, local_err); | |
2210 | } | |
2211 | } | |
2212 | ||
2213 | void qmp_guest_suspend_disk(Error **errp) | |
2214 | { | |
2215 | guest_suspend(SUSPEND_MODE_DISK, errp); | |
2216 | } | |
2217 | ||
2218 | void qmp_guest_suspend_ram(Error **errp) | |
2219 | { | |
2220 | guest_suspend(SUSPEND_MODE_RAM, errp); | |
2221 | } | |
2222 | ||
2223 | void qmp_guest_suspend_hybrid(Error **errp) | |
2224 | { | |
2225 | guest_suspend(SUSPEND_MODE_HYBRID, errp); | |
2226 | } | |
2227 | ||
2228 | /* Transfer online/offline status between @vcpu and the guest system. | |
2229 | * | |
2230 | * On input either @errp or *@errp must be NULL. | |
2231 | * | |
2232 | * In system-to-@vcpu direction, the following @vcpu fields are accessed: | |
2233 | * - R: vcpu->logical_id | |
2234 | * - W: vcpu->online | |
2235 | * - W: vcpu->can_offline | |
2236 | * | |
2237 | * In @vcpu-to-system direction, the following @vcpu fields are accessed: | |
2238 | * - R: vcpu->logical_id | |
2239 | * - R: vcpu->online | |
2240 | * | |
2241 | * Written members remain unmodified on error. | |
2242 | */ | |
2243 | static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu, | |
2244 | char *dirpath, Error **errp) | |
2245 | { | |
2246 | int fd; | |
2247 | int res; | |
2248 | int dirfd; | |
2249 | static const char fn[] = "online"; | |
2250 | ||
2251 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); | |
2252 | if (dirfd == -1) { | |
2253 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); | |
2254 | return; | |
2255 | } | |
2256 | ||
2257 | fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR); | |
2258 | if (fd == -1) { | |
2259 | if (errno != ENOENT) { | |
2260 | error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn); | |
2261 | } else if (sys2vcpu) { | |
2262 | vcpu->online = true; | |
2263 | vcpu->can_offline = false; | |
2264 | } else if (!vcpu->online) { | |
2265 | error_setg(errp, "logical processor #%" PRId64 " can't be " | |
2266 | "offlined", vcpu->logical_id); | |
2267 | } /* otherwise pretend successful re-onlining */ | |
2268 | } else { | |
2269 | unsigned char status; | |
2270 | ||
2271 | res = pread(fd, &status, 1, 0); | |
2272 | if (res == -1) { | |
2273 | error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn); | |
2274 | } else if (res == 0) { | |
2275 | error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath, | |
2276 | fn); | |
2277 | } else if (sys2vcpu) { | |
2278 | vcpu->online = (status != '0'); | |
2279 | vcpu->can_offline = true; | |
2280 | } else if (vcpu->online != (status != '0')) { | |
2281 | status = '0' + vcpu->online; | |
2282 | if (pwrite(fd, &status, 1, 0) == -1) { | |
2283 | error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath, | |
2284 | fn); | |
2285 | } | |
2286 | } /* otherwise pretend successful re-(on|off)-lining */ | |
2287 | ||
2288 | res = close(fd); | |
2289 | g_assert(res == 0); | |
2290 | } | |
2291 | ||
2292 | res = close(dirfd); | |
2293 | g_assert(res == 0); | |
2294 | } | |
2295 | ||
2296 | GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) | |
2297 | { | |
2298 | GuestLogicalProcessorList *head, **tail; | |
2299 | const char *cpu_dir = "/sys/devices/system/cpu"; | |
2300 | const gchar *line; | |
2301 | g_autoptr(GDir) cpu_gdir = NULL; | |
2302 | Error *local_err = NULL; | |
2303 | ||
2304 | head = NULL; | |
2305 | tail = &head; | |
2306 | cpu_gdir = g_dir_open(cpu_dir, 0, NULL); | |
2307 | ||
2308 | if (cpu_gdir == NULL) { | |
2309 | error_setg_errno(errp, errno, "failed to list entries: %s", cpu_dir); | |
2310 | return NULL; | |
2311 | } | |
2312 | ||
2313 | while (local_err == NULL && (line = g_dir_read_name(cpu_gdir)) != NULL) { | |
2314 | GuestLogicalProcessor *vcpu; | |
2315 | int64_t id; | |
2316 | if (sscanf(line, "cpu%" PRId64, &id)) { | |
2317 | g_autofree char *path = g_strdup_printf("/sys/devices/system/cpu/" | |
2318 | "cpu%" PRId64 "/", id); | |
2319 | vcpu = g_malloc0(sizeof *vcpu); | |
2320 | vcpu->logical_id = id; | |
2321 | vcpu->has_can_offline = true; /* lolspeak ftw */ | |
2322 | transfer_vcpu(vcpu, true, path, &local_err); | |
2323 | QAPI_LIST_APPEND(tail, vcpu); | |
2324 | } | |
2325 | } | |
2326 | ||
2327 | if (local_err == NULL) { | |
2328 | /* there's no guest with zero VCPUs */ | |
2329 | g_assert(head != NULL); | |
2330 | return head; | |
2331 | } | |
2332 | ||
2333 | qapi_free_GuestLogicalProcessorList(head); | |
2334 | error_propagate(errp, local_err); | |
2335 | return NULL; | |
2336 | } | |
2337 | ||
2338 | int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) | |
2339 | { | |
2340 | int64_t processed; | |
2341 | Error *local_err = NULL; | |
2342 | ||
2343 | processed = 0; | |
2344 | while (vcpus != NULL) { | |
2345 | char *path = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/", | |
2346 | vcpus->value->logical_id); | |
2347 | ||
2348 | transfer_vcpu(vcpus->value, false, path, &local_err); | |
2349 | g_free(path); | |
2350 | if (local_err != NULL) { | |
2351 | break; | |
2352 | } | |
2353 | ++processed; | |
2354 | vcpus = vcpus->next; | |
2355 | } | |
2356 | ||
2357 | if (local_err != NULL) { | |
2358 | if (processed == 0) { | |
2359 | error_propagate(errp, local_err); | |
2360 | } else { | |
2361 | error_free(local_err); | |
2362 | } | |
2363 | } | |
2364 | ||
2365 | return processed; | |
2366 | } | |
2367 | ||
2368 | void qmp_guest_set_user_password(const char *username, | |
2369 | const char *password, | |
2370 | bool crypted, | |
2371 | Error **errp) | |
2372 | { | |
2373 | Error *local_err = NULL; | |
2374 | char *passwd_path = NULL; | |
2375 | pid_t pid; | |
2376 | int status; | |
2377 | int datafd[2] = { -1, -1 }; | |
2378 | char *rawpasswddata = NULL; | |
2379 | size_t rawpasswdlen; | |
2380 | char *chpasswddata = NULL; | |
2381 | size_t chpasswdlen; | |
2382 | ||
2383 | rawpasswddata = (char *)qbase64_decode(password, -1, &rawpasswdlen, errp); | |
2384 | if (!rawpasswddata) { | |
2385 | return; | |
2386 | } | |
2387 | rawpasswddata = g_renew(char, rawpasswddata, rawpasswdlen + 1); | |
2388 | rawpasswddata[rawpasswdlen] = '\0'; | |
2389 | ||
2390 | if (strchr(rawpasswddata, '\n')) { | |
2391 | error_setg(errp, "forbidden characters in raw password"); | |
2392 | goto out; | |
2393 | } | |
2394 | ||
2395 | if (strchr(username, '\n') || | |
2396 | strchr(username, ':')) { | |
2397 | error_setg(errp, "forbidden characters in username"); | |
2398 | goto out; | |
2399 | } | |
2400 | ||
2401 | chpasswddata = g_strdup_printf("%s:%s\n", username, rawpasswddata); | |
2402 | chpasswdlen = strlen(chpasswddata); | |
2403 | ||
2404 | passwd_path = g_find_program_in_path("chpasswd"); | |
2405 | ||
2406 | if (!passwd_path) { | |
2407 | error_setg(errp, "cannot find 'passwd' program in PATH"); | |
2408 | goto out; | |
2409 | } | |
2410 | ||
2411 | if (!g_unix_open_pipe(datafd, FD_CLOEXEC, NULL)) { | |
2412 | error_setg(errp, "cannot create pipe FDs"); | |
2413 | goto out; | |
2414 | } | |
2415 | ||
2416 | pid = fork(); | |
2417 | if (pid == 0) { | |
2418 | close(datafd[1]); | |
2419 | /* child */ | |
2420 | setsid(); | |
2421 | dup2(datafd[0], 0); | |
2422 | reopen_fd_to_null(1); | |
2423 | reopen_fd_to_null(2); | |
2424 | ||
2425 | if (crypted) { | |
2426 | execl(passwd_path, "chpasswd", "-e", NULL); | |
2427 | } else { | |
2428 | execl(passwd_path, "chpasswd", NULL); | |
2429 | } | |
2430 | _exit(EXIT_FAILURE); | |
2431 | } else if (pid < 0) { | |
2432 | error_setg_errno(errp, errno, "failed to create child process"); | |
2433 | goto out; | |
2434 | } | |
2435 | close(datafd[0]); | |
2436 | datafd[0] = -1; | |
2437 | ||
2438 | if (qemu_write_full(datafd[1], chpasswddata, chpasswdlen) != chpasswdlen) { | |
2439 | error_setg_errno(errp, errno, "cannot write new account password"); | |
2440 | goto out; | |
2441 | } | |
2442 | close(datafd[1]); | |
2443 | datafd[1] = -1; | |
2444 | ||
2445 | ga_wait_child(pid, &status, &local_err); | |
2446 | if (local_err) { | |
2447 | error_propagate(errp, local_err); | |
2448 | goto out; | |
2449 | } | |
2450 | ||
2451 | if (!WIFEXITED(status)) { | |
2452 | error_setg(errp, "child process has terminated abnormally"); | |
2453 | goto out; | |
2454 | } | |
2455 | ||
2456 | if (WEXITSTATUS(status)) { | |
2457 | error_setg(errp, "child process has failed to set user password"); | |
2458 | goto out; | |
2459 | } | |
2460 | ||
2461 | out: | |
2462 | g_free(chpasswddata); | |
2463 | g_free(rawpasswddata); | |
2464 | g_free(passwd_path); | |
2465 | if (datafd[0] != -1) { | |
2466 | close(datafd[0]); | |
2467 | } | |
2468 | if (datafd[1] != -1) { | |
2469 | close(datafd[1]); | |
2470 | } | |
2471 | } | |
2472 | ||
2473 | static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf, | |
2474 | int size, Error **errp) | |
2475 | { | |
2476 | int fd; | |
2477 | int res; | |
2478 | ||
2479 | errno = 0; | |
2480 | fd = openat(dirfd, pathname, O_RDONLY); | |
2481 | if (fd == -1) { | |
2482 | error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); | |
2483 | return; | |
2484 | } | |
2485 | ||
2486 | res = pread(fd, buf, size, 0); | |
2487 | if (res == -1) { | |
2488 | error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname); | |
2489 | } else if (res == 0) { | |
2490 | error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname); | |
2491 | } | |
2492 | close(fd); | |
2493 | } | |
2494 | ||
2495 | static void ga_write_sysfs_file(int dirfd, const char *pathname, | |
2496 | const char *buf, int size, Error **errp) | |
2497 | { | |
2498 | int fd; | |
2499 | ||
2500 | errno = 0; | |
2501 | fd = openat(dirfd, pathname, O_WRONLY); | |
2502 | if (fd == -1) { | |
2503 | error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); | |
2504 | return; | |
2505 | } | |
2506 | ||
2507 | if (pwrite(fd, buf, size, 0) == -1) { | |
2508 | error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname); | |
2509 | } | |
2510 | ||
2511 | close(fd); | |
2512 | } | |
2513 | ||
2514 | /* Transfer online/offline status between @mem_blk and the guest system. | |
2515 | * | |
2516 | * On input either @errp or *@errp must be NULL. | |
2517 | * | |
2518 | * In system-to-@mem_blk direction, the following @mem_blk fields are accessed: | |
2519 | * - R: mem_blk->phys_index | |
2520 | * - W: mem_blk->online | |
2521 | * - W: mem_blk->can_offline | |
2522 | * | |
2523 | * In @mem_blk-to-system direction, the following @mem_blk fields are accessed: | |
2524 | * - R: mem_blk->phys_index | |
2525 | * - R: mem_blk->online | |
2526 | *- R: mem_blk->can_offline | |
2527 | * Written members remain unmodified on error. | |
2528 | */ | |
2529 | static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk, | |
2530 | GuestMemoryBlockResponse *result, | |
2531 | Error **errp) | |
2532 | { | |
2533 | char *dirpath; | |
2534 | int dirfd; | |
2535 | char *status; | |
2536 | Error *local_err = NULL; | |
2537 | ||
2538 | if (!sys2memblk) { | |
2539 | DIR *dp; | |
2540 | ||
2541 | if (!result) { | |
2542 | error_setg(errp, "Internal error, 'result' should not be NULL"); | |
2543 | return; | |
2544 | } | |
2545 | errno = 0; | |
2546 | dp = opendir("/sys/devices/system/memory/"); | |
2547 | /* if there is no 'memory' directory in sysfs, | |
2548 | * we think this VM does not support online/offline memory block, | |
2549 | * any other solution? | |
2550 | */ | |
2551 | if (!dp) { | |
2552 | if (errno == ENOENT) { | |
2553 | result->response = | |
2554 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; | |
2555 | } | |
2556 | goto out1; | |
2557 | } | |
2558 | closedir(dp); | |
2559 | } | |
2560 | ||
2561 | dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/", | |
2562 | mem_blk->phys_index); | |
2563 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); | |
2564 | if (dirfd == -1) { | |
2565 | if (sys2memblk) { | |
2566 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); | |
2567 | } else { | |
2568 | if (errno == ENOENT) { | |
2569 | result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND; | |
2570 | } else { | |
2571 | result->response = | |
2572 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; | |
2573 | } | |
2574 | } | |
2575 | g_free(dirpath); | |
2576 | goto out1; | |
2577 | } | |
2578 | g_free(dirpath); | |
2579 | ||
2580 | status = g_malloc0(10); | |
2581 | ga_read_sysfs_file(dirfd, "state", status, 10, &local_err); | |
2582 | if (local_err) { | |
2583 | /* treat with sysfs file that not exist in old kernel */ | |
2584 | if (errno == ENOENT) { | |
2585 | error_free(local_err); | |
2586 | if (sys2memblk) { | |
2587 | mem_blk->online = true; | |
2588 | mem_blk->can_offline = false; | |
2589 | } else if (!mem_blk->online) { | |
2590 | result->response = | |
2591 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; | |
2592 | } | |
2593 | } else { | |
2594 | if (sys2memblk) { | |
2595 | error_propagate(errp, local_err); | |
2596 | } else { | |
2597 | error_free(local_err); | |
2598 | result->response = | |
2599 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; | |
2600 | } | |
2601 | } | |
2602 | goto out2; | |
2603 | } | |
2604 | ||
2605 | if (sys2memblk) { | |
2606 | char removable = '0'; | |
2607 | ||
2608 | mem_blk->online = (strncmp(status, "online", 6) == 0); | |
2609 | ||
2610 | ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err); | |
2611 | if (local_err) { | |
2612 | /* if no 'removable' file, it doesn't support offline mem blk */ | |
2613 | if (errno == ENOENT) { | |
2614 | error_free(local_err); | |
2615 | mem_blk->can_offline = false; | |
2616 | } else { | |
2617 | error_propagate(errp, local_err); | |
2618 | } | |
2619 | } else { | |
2620 | mem_blk->can_offline = (removable != '0'); | |
2621 | } | |
2622 | } else { | |
2623 | if (mem_blk->online != (strncmp(status, "online", 6) == 0)) { | |
2624 | const char *new_state = mem_blk->online ? "online" : "offline"; | |
2625 | ||
2626 | ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state), | |
2627 | &local_err); | |
2628 | if (local_err) { | |
2629 | error_free(local_err); | |
2630 | result->response = | |
2631 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; | |
2632 | goto out2; | |
2633 | } | |
2634 | ||
2635 | result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS; | |
2636 | result->has_error_code = false; | |
2637 | } /* otherwise pretend successful re-(on|off)-lining */ | |
2638 | } | |
2639 | g_free(status); | |
2640 | close(dirfd); | |
2641 | return; | |
2642 | ||
2643 | out2: | |
2644 | g_free(status); | |
2645 | close(dirfd); | |
2646 | out1: | |
2647 | if (!sys2memblk) { | |
2648 | result->has_error_code = true; | |
2649 | result->error_code = errno; | |
2650 | } | |
2651 | } | |
2652 | ||
2653 | GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) | |
2654 | { | |
2655 | GuestMemoryBlockList *head, **tail; | |
2656 | Error *local_err = NULL; | |
2657 | struct dirent *de; | |
2658 | DIR *dp; | |
2659 | ||
2660 | head = NULL; | |
2661 | tail = &head; | |
2662 | ||
2663 | dp = opendir("/sys/devices/system/memory/"); | |
2664 | if (!dp) { | |
2665 | /* it's ok if this happens to be a system that doesn't expose | |
2666 | * memory blocks via sysfs, but otherwise we should report | |
2667 | * an error | |
2668 | */ | |
2669 | if (errno != ENOENT) { | |
2670 | error_setg_errno(errp, errno, "Can't open directory" | |
2671 | "\"/sys/devices/system/memory/\""); | |
2672 | } | |
2673 | return NULL; | |
2674 | } | |
2675 | ||
2676 | /* Note: the phys_index of memory block may be discontinuous, | |
2677 | * this is because a memblk is the unit of the Sparse Memory design, which | |
2678 | * allows discontinuous memory ranges (ex. NUMA), so here we should | |
2679 | * traverse the memory block directory. | |
2680 | */ | |
2681 | while ((de = readdir(dp)) != NULL) { | |
2682 | GuestMemoryBlock *mem_blk; | |
2683 | ||
2684 | if ((strncmp(de->d_name, "memory", 6) != 0) || | |
2685 | !(de->d_type & DT_DIR)) { | |
2686 | continue; | |
2687 | } | |
2688 | ||
2689 | mem_blk = g_malloc0(sizeof *mem_blk); | |
2690 | /* The d_name is "memoryXXX", phys_index is block id, same as XXX */ | |
2691 | mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10); | |
2692 | mem_blk->has_can_offline = true; /* lolspeak ftw */ | |
2693 | transfer_memory_block(mem_blk, true, NULL, &local_err); | |
2694 | if (local_err) { | |
2695 | break; | |
2696 | } | |
2697 | ||
2698 | QAPI_LIST_APPEND(tail, mem_blk); | |
2699 | } | |
2700 | ||
2701 | closedir(dp); | |
2702 | if (local_err == NULL) { | |
2703 | /* there's no guest with zero memory blocks */ | |
2704 | if (head == NULL) { | |
2705 | error_setg(errp, "guest reported zero memory blocks!"); | |
2706 | } | |
2707 | return head; | |
2708 | } | |
2709 | ||
2710 | qapi_free_GuestMemoryBlockList(head); | |
2711 | error_propagate(errp, local_err); | |
2712 | return NULL; | |
2713 | } | |
2714 | ||
2715 | GuestMemoryBlockResponseList * | |
2716 | qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) | |
2717 | { | |
2718 | GuestMemoryBlockResponseList *head, **tail; | |
2719 | Error *local_err = NULL; | |
2720 | ||
2721 | head = NULL; | |
2722 | tail = &head; | |
2723 | ||
2724 | while (mem_blks != NULL) { | |
2725 | GuestMemoryBlockResponse *result; | |
2726 | GuestMemoryBlock *current_mem_blk = mem_blks->value; | |
2727 | ||
2728 | result = g_malloc0(sizeof(*result)); | |
2729 | result->phys_index = current_mem_blk->phys_index; | |
2730 | transfer_memory_block(current_mem_blk, false, result, &local_err); | |
2731 | if (local_err) { /* should never happen */ | |
2732 | goto err; | |
2733 | } | |
2734 | ||
2735 | QAPI_LIST_APPEND(tail, result); | |
2736 | mem_blks = mem_blks->next; | |
2737 | } | |
2738 | ||
2739 | return head; | |
2740 | err: | |
2741 | qapi_free_GuestMemoryBlockResponseList(head); | |
2742 | error_propagate(errp, local_err); | |
2743 | return NULL; | |
2744 | } | |
2745 | ||
2746 | GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) | |
2747 | { | |
2748 | Error *local_err = NULL; | |
2749 | char *dirpath; | |
2750 | int dirfd; | |
2751 | char *buf; | |
2752 | GuestMemoryBlockInfo *info; | |
2753 | ||
2754 | dirpath = g_strdup_printf("/sys/devices/system/memory/"); | |
2755 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); | |
2756 | if (dirfd == -1) { | |
2757 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); | |
2758 | g_free(dirpath); | |
2759 | return NULL; | |
2760 | } | |
2761 | g_free(dirpath); | |
2762 | ||
2763 | buf = g_malloc0(20); | |
2764 | ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err); | |
2765 | close(dirfd); | |
2766 | if (local_err) { | |
2767 | g_free(buf); | |
2768 | error_propagate(errp, local_err); | |
2769 | return NULL; | |
2770 | } | |
2771 | ||
2772 | info = g_new0(GuestMemoryBlockInfo, 1); | |
2773 | info->size = strtol(buf, NULL, 16); /* the unit is bytes */ | |
2774 | ||
2775 | g_free(buf); | |
2776 | ||
2777 | return info; | |
2778 | } | |
2779 | ||
2780 | #define MAX_NAME_LEN 128 | |
2781 | static GuestDiskStatsInfoList *guest_get_diskstats(Error **errp) | |
2782 | { | |
2783 | #ifdef CONFIG_LINUX | |
2784 | GuestDiskStatsInfoList *head = NULL, **tail = &head; | |
2785 | const char *diskstats = "/proc/diskstats"; | |
2786 | FILE *fp; | |
2787 | size_t n; | |
2788 | char *line = NULL; | |
2789 | ||
2790 | fp = fopen(diskstats, "r"); | |
2791 | if (fp == NULL) { | |
2792 | error_setg_errno(errp, errno, "open(\"%s\")", diskstats); | |
2793 | return NULL; | |
2794 | } | |
2795 | ||
2796 | while (getline(&line, &n, fp) != -1) { | |
2797 | g_autofree GuestDiskStatsInfo *diskstatinfo = NULL; | |
2798 | g_autofree GuestDiskStats *diskstat = NULL; | |
2799 | char dev_name[MAX_NAME_LEN]; | |
2800 | unsigned int ios_pgr, tot_ticks, rq_ticks, wr_ticks, dc_ticks, fl_ticks; | |
2801 | unsigned long rd_ios, rd_merges_or_rd_sec, rd_ticks_or_wr_sec, wr_ios; | |
2802 | unsigned long wr_merges, rd_sec_or_wr_ios, wr_sec; | |
2803 | unsigned long dc_ios, dc_merges, dc_sec, fl_ios; | |
2804 | unsigned int major, minor; | |
2805 | int i; | |
2806 | ||
2807 | i = sscanf(line, "%u %u %s %lu %lu %lu" | |
2808 | "%lu %lu %lu %lu %u %u %u %u" | |
2809 | "%lu %lu %lu %u %lu %u", | |
2810 | &major, &minor, dev_name, | |
2811 | &rd_ios, &rd_merges_or_rd_sec, &rd_sec_or_wr_ios, | |
2812 | &rd_ticks_or_wr_sec, &wr_ios, &wr_merges, &wr_sec, | |
2813 | &wr_ticks, &ios_pgr, &tot_ticks, &rq_ticks, | |
2814 | &dc_ios, &dc_merges, &dc_sec, &dc_ticks, | |
2815 | &fl_ios, &fl_ticks); | |
2816 | ||
2817 | if (i < 7) { | |
2818 | continue; | |
2819 | } | |
2820 | ||
2821 | diskstatinfo = g_new0(GuestDiskStatsInfo, 1); | |
2822 | diskstatinfo->name = g_strdup(dev_name); | |
2823 | diskstatinfo->major = major; | |
2824 | diskstatinfo->minor = minor; | |
2825 | ||
2826 | diskstat = g_new0(GuestDiskStats, 1); | |
2827 | if (i == 7) { | |
2828 | diskstat->has_read_ios = true; | |
2829 | diskstat->read_ios = rd_ios; | |
2830 | diskstat->has_read_sectors = true; | |
2831 | diskstat->read_sectors = rd_merges_or_rd_sec; | |
2832 | diskstat->has_write_ios = true; | |
2833 | diskstat->write_ios = rd_sec_or_wr_ios; | |
2834 | diskstat->has_write_sectors = true; | |
2835 | diskstat->write_sectors = rd_ticks_or_wr_sec; | |
2836 | } | |
2837 | if (i >= 14) { | |
2838 | diskstat->has_read_ios = true; | |
2839 | diskstat->read_ios = rd_ios; | |
2840 | diskstat->has_read_sectors = true; | |
2841 | diskstat->read_sectors = rd_sec_or_wr_ios; | |
2842 | diskstat->has_read_merges = true; | |
2843 | diskstat->read_merges = rd_merges_or_rd_sec; | |
2844 | diskstat->has_read_ticks = true; | |
2845 | diskstat->read_ticks = rd_ticks_or_wr_sec; | |
2846 | diskstat->has_write_ios = true; | |
2847 | diskstat->write_ios = wr_ios; | |
2848 | diskstat->has_write_sectors = true; | |
2849 | diskstat->write_sectors = wr_sec; | |
2850 | diskstat->has_write_merges = true; | |
2851 | diskstat->write_merges = wr_merges; | |
2852 | diskstat->has_write_ticks = true; | |
2853 | diskstat->write_ticks = wr_ticks; | |
2854 | diskstat->has_ios_pgr = true; | |
2855 | diskstat->ios_pgr = ios_pgr; | |
2856 | diskstat->has_total_ticks = true; | |
2857 | diskstat->total_ticks = tot_ticks; | |
2858 | diskstat->has_weight_ticks = true; | |
2859 | diskstat->weight_ticks = rq_ticks; | |
2860 | } | |
2861 | if (i >= 18) { | |
2862 | diskstat->has_discard_ios = true; | |
2863 | diskstat->discard_ios = dc_ios; | |
2864 | diskstat->has_discard_merges = true; | |
2865 | diskstat->discard_merges = dc_merges; | |
2866 | diskstat->has_discard_sectors = true; | |
2867 | diskstat->discard_sectors = dc_sec; | |
2868 | diskstat->has_discard_ticks = true; | |
2869 | diskstat->discard_ticks = dc_ticks; | |
2870 | } | |
2871 | if (i >= 20) { | |
2872 | diskstat->has_flush_ios = true; | |
2873 | diskstat->flush_ios = fl_ios; | |
2874 | diskstat->has_flush_ticks = true; | |
2875 | diskstat->flush_ticks = fl_ticks; | |
2876 | } | |
2877 | ||
2878 | diskstatinfo->stats = g_steal_pointer(&diskstat); | |
2879 | QAPI_LIST_APPEND(tail, diskstatinfo); | |
2880 | diskstatinfo = NULL; | |
2881 | } | |
2882 | free(line); | |
2883 | fclose(fp); | |
2884 | return head; | |
2885 | #else | |
2886 | g_debug("disk stats reporting available only for Linux"); | |
2887 | return NULL; | |
2888 | #endif | |
2889 | } | |
2890 | ||
2891 | GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp) | |
2892 | { | |
2893 | return guest_get_diskstats(errp); | |
2894 | } | |
2895 | ||
2896 | #else /* defined(__linux__) */ | |
2897 | ||
2898 | void qmp_guest_suspend_disk(Error **errp) | |
2899 | { | |
2900 | error_setg(errp, QERR_UNSUPPORTED); | |
2901 | } | |
2902 | ||
2903 | void qmp_guest_suspend_ram(Error **errp) | |
2904 | { | |
2905 | error_setg(errp, QERR_UNSUPPORTED); | |
2906 | } | |
2907 | ||
2908 | void qmp_guest_suspend_hybrid(Error **errp) | |
2909 | { | |
2910 | error_setg(errp, QERR_UNSUPPORTED); | |
2911 | } | |
2912 | ||
2913 | GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) | |
2914 | { | |
2915 | error_setg(errp, QERR_UNSUPPORTED); | |
2916 | return NULL; | |
2917 | } | |
2918 | ||
2919 | int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) | |
2920 | { | |
2921 | error_setg(errp, QERR_UNSUPPORTED); | |
2922 | return -1; | |
2923 | } | |
2924 | ||
2925 | void qmp_guest_set_user_password(const char *username, | |
2926 | const char *password, | |
2927 | bool crypted, | |
2928 | Error **errp) | |
2929 | { | |
2930 | error_setg(errp, QERR_UNSUPPORTED); | |
2931 | } | |
2932 | ||
2933 | GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) | |
2934 | { | |
2935 | error_setg(errp, QERR_UNSUPPORTED); | |
2936 | return NULL; | |
2937 | } | |
2938 | ||
2939 | GuestMemoryBlockResponseList * | |
2940 | qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) | |
2941 | { | |
2942 | error_setg(errp, QERR_UNSUPPORTED); | |
2943 | return NULL; | |
2944 | } | |
2945 | ||
2946 | GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) | |
2947 | { | |
2948 | error_setg(errp, QERR_UNSUPPORTED); | |
2949 | return NULL; | |
2950 | } | |
2951 | ||
2952 | #endif | |
2953 | ||
2954 | #ifdef HAVE_GETIFADDRS | |
2955 | static GuestNetworkInterface * | |
2956 | guest_find_interface(GuestNetworkInterfaceList *head, | |
2957 | const char *name) | |
2958 | { | |
2959 | for (; head; head = head->next) { | |
2960 | if (strcmp(head->value->name, name) == 0) { | |
2961 | return head->value; | |
2962 | } | |
2963 | } | |
2964 | ||
2965 | return NULL; | |
2966 | } | |
2967 | ||
2968 | static int guest_get_network_stats(const char *name, | |
2969 | GuestNetworkInterfaceStat *stats) | |
2970 | { | |
2971 | #ifdef CONFIG_LINUX | |
2972 | int name_len; | |
2973 | char const *devinfo = "/proc/net/dev"; | |
2974 | FILE *fp; | |
2975 | char *line = NULL, *colon; | |
2976 | size_t n = 0; | |
2977 | fp = fopen(devinfo, "r"); | |
2978 | if (!fp) { | |
2979 | g_debug("failed to open network stats %s: %s", devinfo, | |
2980 | g_strerror(errno)); | |
2981 | return -1; | |
2982 | } | |
2983 | name_len = strlen(name); | |
2984 | while (getline(&line, &n, fp) != -1) { | |
2985 | long long dummy; | |
2986 | long long rx_bytes; | |
2987 | long long rx_packets; | |
2988 | long long rx_errs; | |
2989 | long long rx_dropped; | |
2990 | long long tx_bytes; | |
2991 | long long tx_packets; | |
2992 | long long tx_errs; | |
2993 | long long tx_dropped; | |
2994 | char *trim_line; | |
2995 | trim_line = g_strchug(line); | |
2996 | if (trim_line[0] == '\0') { | |
2997 | continue; | |
2998 | } | |
2999 | colon = strchr(trim_line, ':'); | |
3000 | if (!colon) { | |
3001 | continue; | |
3002 | } | |
3003 | if (colon - name_len == trim_line && | |
3004 | strncmp(trim_line, name, name_len) == 0) { | |
3005 | if (sscanf(colon + 1, | |
3006 | "%lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld", | |
3007 | &rx_bytes, &rx_packets, &rx_errs, &rx_dropped, | |
3008 | &dummy, &dummy, &dummy, &dummy, | |
3009 | &tx_bytes, &tx_packets, &tx_errs, &tx_dropped, | |
3010 | &dummy, &dummy, &dummy, &dummy) != 16) { | |
3011 | continue; | |
3012 | } | |
3013 | stats->rx_bytes = rx_bytes; | |
3014 | stats->rx_packets = rx_packets; | |
3015 | stats->rx_errs = rx_errs; | |
3016 | stats->rx_dropped = rx_dropped; | |
3017 | stats->tx_bytes = tx_bytes; | |
3018 | stats->tx_packets = tx_packets; | |
3019 | stats->tx_errs = tx_errs; | |
3020 | stats->tx_dropped = tx_dropped; | |
3021 | fclose(fp); | |
3022 | g_free(line); | |
3023 | return 0; | |
3024 | } | |
3025 | } | |
3026 | fclose(fp); | |
3027 | g_free(line); | |
3028 | g_debug("/proc/net/dev: Interface '%s' not found", name); | |
3029 | #else /* !CONFIG_LINUX */ | |
3030 | g_debug("Network stats reporting available only for Linux"); | |
3031 | #endif /* !CONFIG_LINUX */ | |
3032 | return -1; | |
3033 | } | |
3034 | ||
3035 | /* | |
3036 | * Build information about guest interfaces | |
3037 | */ | |
3038 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) | |
3039 | { | |
3040 | GuestNetworkInterfaceList *head = NULL, **tail = &head; | |
3041 | struct ifaddrs *ifap, *ifa; | |
3042 | ||
3043 | if (getifaddrs(&ifap) < 0) { | |
3044 | error_setg_errno(errp, errno, "getifaddrs failed"); | |
3045 | goto error; | |
3046 | } | |
3047 | ||
3048 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { | |
3049 | GuestNetworkInterface *info; | |
3050 | GuestIpAddressList **address_tail; | |
3051 | GuestIpAddress *address_item = NULL; | |
3052 | GuestNetworkInterfaceStat *interface_stat = NULL; | |
3053 | char addr4[INET_ADDRSTRLEN]; | |
3054 | char addr6[INET6_ADDRSTRLEN]; | |
3055 | int sock; | |
3056 | struct ifreq ifr; | |
3057 | unsigned char *mac_addr; | |
3058 | void *p; | |
3059 | ||
3060 | g_debug("Processing %s interface", ifa->ifa_name); | |
3061 | ||
3062 | info = guest_find_interface(head, ifa->ifa_name); | |
3063 | ||
3064 | if (!info) { | |
3065 | info = g_malloc0(sizeof(*info)); | |
3066 | info->name = g_strdup(ifa->ifa_name); | |
3067 | ||
3068 | QAPI_LIST_APPEND(tail, info); | |
3069 | } | |
3070 | ||
3071 | if (!info->has_hardware_address) { | |
3072 | /* we haven't obtained HW address yet */ | |
3073 | sock = socket(PF_INET, SOCK_STREAM, 0); | |
3074 | if (sock == -1) { | |
3075 | error_setg_errno(errp, errno, "failed to create socket"); | |
3076 | goto error; | |
3077 | } | |
3078 | ||
3079 | memset(&ifr, 0, sizeof(ifr)); | |
3080 | pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->name); | |
3081 | if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) { | |
3082 | /* | |
3083 | * We can't get the hw addr of this interface, but that's not a | |
3084 | * fatal error. Don't set info->hardware_address, but keep | |
3085 | * going. | |
3086 | */ | |
3087 | if (errno == EADDRNOTAVAIL) { | |
3088 | /* The interface doesn't have a hw addr (e.g. loopback). */ | |
3089 | g_debug("failed to get MAC address of %s: %s", | |
3090 | ifa->ifa_name, strerror(errno)); | |
3091 | } else{ | |
3092 | g_warning("failed to get MAC address of %s: %s", | |
3093 | ifa->ifa_name, strerror(errno)); | |
3094 | } | |
3095 | ||
3096 | } else { | |
3097 | #ifdef CONFIG_SOLARIS | |
3098 | mac_addr = (unsigned char *) &ifr.ifr_addr.sa_data; | |
3099 | #else | |
3100 | mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data; | |
3101 | #endif | |
3102 | info->hardware_address = | |
3103 | g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x", | |
3104 | (int) mac_addr[0], (int) mac_addr[1], | |
3105 | (int) mac_addr[2], (int) mac_addr[3], | |
3106 | (int) mac_addr[4], (int) mac_addr[5]); | |
3107 | ||
3108 | info->has_hardware_address = true; | |
3109 | } | |
3110 | close(sock); | |
3111 | } | |
3112 | ||
3113 | if (ifa->ifa_addr && | |
3114 | ifa->ifa_addr->sa_family == AF_INET) { | |
3115 | /* interface with IPv4 address */ | |
3116 | p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr; | |
3117 | if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) { | |
3118 | error_setg_errno(errp, errno, "inet_ntop failed"); | |
3119 | goto error; | |
3120 | } | |
3121 | ||
3122 | address_item = g_malloc0(sizeof(*address_item)); | |
3123 | address_item->ip_address = g_strdup(addr4); | |
3124 | address_item->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4; | |
3125 | ||
3126 | if (ifa->ifa_netmask) { | |
3127 | /* Count the number of set bits in netmask. | |
3128 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
3129 | p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr; | |
3130 | address_item->prefix = ctpop32(((uint32_t *) p)[0]); | |
3131 | } | |
3132 | } else if (ifa->ifa_addr && | |
3133 | ifa->ifa_addr->sa_family == AF_INET6) { | |
3134 | /* interface with IPv6 address */ | |
3135 | p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr; | |
3136 | if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) { | |
3137 | error_setg_errno(errp, errno, "inet_ntop failed"); | |
3138 | goto error; | |
3139 | } | |
3140 | ||
3141 | address_item = g_malloc0(sizeof(*address_item)); | |
3142 | address_item->ip_address = g_strdup(addr6); | |
3143 | address_item->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6; | |
3144 | ||
3145 | if (ifa->ifa_netmask) { | |
3146 | /* Count the number of set bits in netmask. | |
3147 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
3148 | p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr; | |
3149 | address_item->prefix = | |
3150 | ctpop32(((uint32_t *) p)[0]) + | |
3151 | ctpop32(((uint32_t *) p)[1]) + | |
3152 | ctpop32(((uint32_t *) p)[2]) + | |
3153 | ctpop32(((uint32_t *) p)[3]); | |
3154 | } | |
3155 | } | |
3156 | ||
3157 | if (!address_item) { | |
3158 | continue; | |
3159 | } | |
3160 | ||
3161 | address_tail = &info->ip_addresses; | |
3162 | while (*address_tail) { | |
3163 | address_tail = &(*address_tail)->next; | |
3164 | } | |
3165 | QAPI_LIST_APPEND(address_tail, address_item); | |
3166 | ||
3167 | info->has_ip_addresses = true; | |
3168 | ||
3169 | if (!info->has_statistics) { | |
3170 | interface_stat = g_malloc0(sizeof(*interface_stat)); | |
3171 | if (guest_get_network_stats(info->name, interface_stat) == -1) { | |
3172 | info->has_statistics = false; | |
3173 | g_free(interface_stat); | |
3174 | } else { | |
3175 | info->statistics = interface_stat; | |
3176 | info->has_statistics = true; | |
3177 | } | |
3178 | } | |
3179 | } | |
3180 | ||
3181 | freeifaddrs(ifap); | |
3182 | return head; | |
3183 | ||
3184 | error: | |
3185 | freeifaddrs(ifap); | |
3186 | qapi_free_GuestNetworkInterfaceList(head); | |
3187 | return NULL; | |
3188 | } | |
3189 | ||
3190 | #else | |
3191 | ||
3192 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) | |
3193 | { | |
3194 | error_setg(errp, QERR_UNSUPPORTED); | |
3195 | return NULL; | |
3196 | } | |
3197 | ||
3198 | #endif /* HAVE_GETIFADDRS */ | |
3199 | ||
3200 | #if !defined(CONFIG_FSFREEZE) | |
3201 | ||
3202 | GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) | |
3203 | { | |
3204 | error_setg(errp, QERR_UNSUPPORTED); | |
3205 | return NULL; | |
3206 | } | |
3207 | ||
3208 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp) | |
3209 | { | |
3210 | error_setg(errp, QERR_UNSUPPORTED); | |
3211 | ||
3212 | return 0; | |
3213 | } | |
3214 | ||
3215 | int64_t qmp_guest_fsfreeze_freeze(Error **errp) | |
3216 | { | |
3217 | error_setg(errp, QERR_UNSUPPORTED); | |
3218 | ||
3219 | return 0; | |
3220 | } | |
3221 | ||
3222 | int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints, | |
3223 | strList *mountpoints, | |
3224 | Error **errp) | |
3225 | { | |
3226 | error_setg(errp, QERR_UNSUPPORTED); | |
3227 | ||
3228 | return 0; | |
3229 | } | |
3230 | ||
3231 | int64_t qmp_guest_fsfreeze_thaw(Error **errp) | |
3232 | { | |
3233 | error_setg(errp, QERR_UNSUPPORTED); | |
3234 | ||
3235 | return 0; | |
3236 | } | |
3237 | ||
3238 | GuestDiskInfoList *qmp_guest_get_disks(Error **errp) | |
3239 | { | |
3240 | error_setg(errp, QERR_UNSUPPORTED); | |
3241 | return NULL; | |
3242 | } | |
3243 | ||
3244 | GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp) | |
3245 | { | |
3246 | error_setg(errp, QERR_UNSUPPORTED); | |
3247 | return NULL; | |
3248 | } | |
3249 | ||
3250 | ||
3251 | #endif /* CONFIG_FSFREEZE */ | |
3252 | ||
3253 | #if !defined(CONFIG_FSTRIM) | |
3254 | GuestFilesystemTrimResponse * | |
3255 | qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) | |
3256 | { | |
3257 | error_setg(errp, QERR_UNSUPPORTED); | |
3258 | return NULL; | |
3259 | } | |
3260 | #endif | |
3261 | ||
3262 | /* add unsupported commands to the blacklist */ | |
3263 | GList *ga_command_blacklist_init(GList *blacklist) | |
3264 | { | |
3265 | #if !defined(__linux__) | |
3266 | { | |
3267 | const char *list[] = { | |
3268 | "guest-suspend-disk", "guest-suspend-ram", | |
3269 | "guest-suspend-hybrid", "guest-get-vcpus", "guest-set-vcpus", | |
3270 | "guest-get-memory-blocks", "guest-set-memory-blocks", | |
3271 | "guest-get-memory-block-size", "guest-get-memory-block-info", | |
3272 | NULL}; | |
3273 | char **p = (char **)list; | |
3274 | ||
3275 | while (*p) { | |
3276 | blacklist = g_list_append(blacklist, g_strdup(*p++)); | |
3277 | } | |
3278 | } | |
3279 | #endif | |
3280 | ||
3281 | #if !defined(HAVE_GETIFADDRS) | |
3282 | blacklist = g_list_append(blacklist, | |
3283 | g_strdup("guest-network-get-interfaces")); | |
3284 | #endif | |
3285 | ||
3286 | #if !defined(CONFIG_FSFREEZE) | |
3287 | { | |
3288 | const char *list[] = { | |
3289 | "guest-get-fsinfo", "guest-fsfreeze-status", | |
3290 | "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list", | |
3291 | "guest-fsfreeze-thaw", "guest-get-fsinfo", | |
3292 | "guest-get-disks", NULL}; | |
3293 | char **p = (char **)list; | |
3294 | ||
3295 | while (*p) { | |
3296 | blacklist = g_list_append(blacklist, g_strdup(*p++)); | |
3297 | } | |
3298 | } | |
3299 | #endif | |
3300 | ||
3301 | #if !defined(CONFIG_FSTRIM) | |
3302 | blacklist = g_list_append(blacklist, g_strdup("guest-fstrim")); | |
3303 | #endif | |
3304 | ||
3305 | blacklist = g_list_append(blacklist, g_strdup("guest-get-devices")); | |
3306 | ||
3307 | return blacklist; | |
3308 | } | |
3309 | ||
3310 | /* register init/cleanup routines for stateful command groups */ | |
3311 | void ga_command_state_init(GAState *s, GACommandState *cs) | |
3312 | { | |
3313 | #if defined(CONFIG_FSFREEZE) | |
3314 | ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup); | |
3315 | #endif | |
3316 | } | |
3317 | ||
3318 | #ifdef HAVE_UTMPX | |
3319 | ||
3320 | #define QGA_MICRO_SECOND_TO_SECOND 1000000 | |
3321 | ||
3322 | static double ga_get_login_time(struct utmpx *user_info) | |
3323 | { | |
3324 | double seconds = (double)user_info->ut_tv.tv_sec; | |
3325 | double useconds = (double)user_info->ut_tv.tv_usec; | |
3326 | useconds /= QGA_MICRO_SECOND_TO_SECOND; | |
3327 | return seconds + useconds; | |
3328 | } | |
3329 | ||
3330 | GuestUserList *qmp_guest_get_users(Error **errp) | |
3331 | { | |
3332 | GHashTable *cache = NULL; | |
3333 | GuestUserList *head = NULL, **tail = &head; | |
3334 | struct utmpx *user_info = NULL; | |
3335 | gpointer value = NULL; | |
3336 | GuestUser *user = NULL; | |
3337 | double login_time = 0; | |
3338 | ||
3339 | cache = g_hash_table_new(g_str_hash, g_str_equal); | |
3340 | setutxent(); | |
3341 | ||
3342 | for (;;) { | |
3343 | user_info = getutxent(); | |
3344 | if (user_info == NULL) { | |
3345 | break; | |
3346 | } else if (user_info->ut_type != USER_PROCESS) { | |
3347 | continue; | |
3348 | } else if (g_hash_table_contains(cache, user_info->ut_user)) { | |
3349 | value = g_hash_table_lookup(cache, user_info->ut_user); | |
3350 | user = (GuestUser *)value; | |
3351 | login_time = ga_get_login_time(user_info); | |
3352 | /* We're ensuring the earliest login time to be sent */ | |
3353 | if (login_time < user->login_time) { | |
3354 | user->login_time = login_time; | |
3355 | } | |
3356 | continue; | |
3357 | } | |
3358 | ||
3359 | user = g_new0(GuestUser, 1); | |
3360 | user->user = g_strdup(user_info->ut_user); | |
3361 | user->login_time = ga_get_login_time(user_info); | |
3362 | ||
3363 | g_hash_table_insert(cache, user->user, user); | |
3364 | ||
3365 | QAPI_LIST_APPEND(tail, user); | |
3366 | } | |
3367 | endutxent(); | |
3368 | g_hash_table_destroy(cache); | |
3369 | return head; | |
3370 | } | |
3371 | ||
3372 | #else | |
3373 | ||
3374 | GuestUserList *qmp_guest_get_users(Error **errp) | |
3375 | { | |
3376 | error_setg(errp, QERR_UNSUPPORTED); | |
3377 | return NULL; | |
3378 | } | |
3379 | ||
3380 | #endif | |
3381 | ||
3382 | /* Replace escaped special characters with theire real values. The replacement | |
3383 | * is done in place -- returned value is in the original string. | |
3384 | */ | |
3385 | static void ga_osrelease_replace_special(gchar *value) | |
3386 | { | |
3387 | gchar *p, *p2, quote; | |
3388 | ||
3389 | /* Trim the string at first space or semicolon if it is not enclosed in | |
3390 | * single or double quotes. */ | |
3391 | if ((value[0] != '"') || (value[0] == '\'')) { | |
3392 | p = strchr(value, ' '); | |
3393 | if (p != NULL) { | |
3394 | *p = 0; | |
3395 | } | |
3396 | p = strchr(value, ';'); | |
3397 | if (p != NULL) { | |
3398 | *p = 0; | |
3399 | } | |
3400 | return; | |
3401 | } | |
3402 | ||
3403 | quote = value[0]; | |
3404 | p2 = value; | |
3405 | p = value + 1; | |
3406 | while (*p != 0) { | |
3407 | if (*p == '\\') { | |
3408 | p++; | |
3409 | switch (*p) { | |
3410 | case '$': | |
3411 | case '\'': | |
3412 | case '"': | |
3413 | case '\\': | |
3414 | case '`': | |
3415 | break; | |
3416 | default: | |
3417 | /* Keep literal backslash followed by whatever is there */ | |
3418 | p--; | |
3419 | break; | |
3420 | } | |
3421 | } else if (*p == quote) { | |
3422 | *p2 = 0; | |
3423 | break; | |
3424 | } | |
3425 | *(p2++) = *(p++); | |
3426 | } | |
3427 | } | |
3428 | ||
3429 | static GKeyFile *ga_parse_osrelease(const char *fname) | |
3430 | { | |
3431 | gchar *content = NULL; | |
3432 | gchar *content2 = NULL; | |
3433 | GError *err = NULL; | |
3434 | GKeyFile *keys = g_key_file_new(); | |
3435 | const char *group = "[os-release]\n"; | |
3436 | ||
3437 | if (!g_file_get_contents(fname, &content, NULL, &err)) { | |
3438 | slog("failed to read '%s', error: %s", fname, err->message); | |
3439 | goto fail; | |
3440 | } | |
3441 | ||
3442 | if (!g_utf8_validate(content, -1, NULL)) { | |
3443 | slog("file is not utf-8 encoded: %s", fname); | |
3444 | goto fail; | |
3445 | } | |
3446 | content2 = g_strdup_printf("%s%s", group, content); | |
3447 | ||
3448 | if (!g_key_file_load_from_data(keys, content2, -1, G_KEY_FILE_NONE, | |
3449 | &err)) { | |
3450 | slog("failed to parse file '%s', error: %s", fname, err->message); | |
3451 | goto fail; | |
3452 | } | |
3453 | ||
3454 | g_free(content); | |
3455 | g_free(content2); | |
3456 | return keys; | |
3457 | ||
3458 | fail: | |
3459 | g_error_free(err); | |
3460 | g_free(content); | |
3461 | g_free(content2); | |
3462 | g_key_file_free(keys); | |
3463 | return NULL; | |
3464 | } | |
3465 | ||
3466 | GuestOSInfo *qmp_guest_get_osinfo(Error **errp) | |
3467 | { | |
3468 | GuestOSInfo *info = NULL; | |
3469 | struct utsname kinfo; | |
3470 | GKeyFile *osrelease = NULL; | |
3471 | const char *qga_os_release = g_getenv("QGA_OS_RELEASE"); | |
3472 | ||
3473 | info = g_new0(GuestOSInfo, 1); | |
3474 | ||
3475 | if (uname(&kinfo) != 0) { | |
3476 | error_setg_errno(errp, errno, "uname failed"); | |
3477 | } else { | |
3478 | info->has_kernel_version = true; | |
3479 | info->kernel_version = g_strdup(kinfo.version); | |
3480 | info->has_kernel_release = true; | |
3481 | info->kernel_release = g_strdup(kinfo.release); | |
3482 | info->has_machine = true; | |
3483 | info->machine = g_strdup(kinfo.machine); | |
3484 | } | |
3485 | ||
3486 | if (qga_os_release != NULL) { | |
3487 | osrelease = ga_parse_osrelease(qga_os_release); | |
3488 | } else { | |
3489 | osrelease = ga_parse_osrelease("/etc/os-release"); | |
3490 | if (osrelease == NULL) { | |
3491 | osrelease = ga_parse_osrelease("/usr/lib/os-release"); | |
3492 | } | |
3493 | } | |
3494 | ||
3495 | if (osrelease != NULL) { | |
3496 | char *value; | |
3497 | ||
3498 | #define GET_FIELD(field, osfield) do { \ | |
3499 | value = g_key_file_get_value(osrelease, "os-release", osfield, NULL); \ | |
3500 | if (value != NULL) { \ | |
3501 | ga_osrelease_replace_special(value); \ | |
3502 | info->has_ ## field = true; \ | |
3503 | info->field = value; \ | |
3504 | } \ | |
3505 | } while (0) | |
3506 | GET_FIELD(id, "ID"); | |
3507 | GET_FIELD(name, "NAME"); | |
3508 | GET_FIELD(pretty_name, "PRETTY_NAME"); | |
3509 | GET_FIELD(version, "VERSION"); | |
3510 | GET_FIELD(version_id, "VERSION_ID"); | |
3511 | GET_FIELD(variant, "VARIANT"); | |
3512 | GET_FIELD(variant_id, "VARIANT_ID"); | |
3513 | #undef GET_FIELD | |
3514 | ||
3515 | g_key_file_free(osrelease); | |
3516 | } | |
3517 | ||
3518 | return info; | |
3519 | } | |
3520 | ||
3521 | GuestDeviceInfoList *qmp_guest_get_devices(Error **errp) | |
3522 | { | |
3523 | error_setg(errp, QERR_UNSUPPORTED); | |
3524 | ||
3525 | return NULL; | |
3526 | } | |
3527 | ||
3528 | #ifndef HOST_NAME_MAX | |
3529 | # ifdef _POSIX_HOST_NAME_MAX | |
3530 | # define HOST_NAME_MAX _POSIX_HOST_NAME_MAX | |
3531 | # else | |
3532 | # define HOST_NAME_MAX 255 | |
3533 | # endif | |
3534 | #endif | |
3535 | ||
3536 | char *qga_get_host_name(Error **errp) | |
3537 | { | |
3538 | long len = -1; | |
3539 | g_autofree char *hostname = NULL; | |
3540 | ||
3541 | #ifdef _SC_HOST_NAME_MAX | |
3542 | len = sysconf(_SC_HOST_NAME_MAX); | |
3543 | #endif /* _SC_HOST_NAME_MAX */ | |
3544 | ||
3545 | if (len < 0) { | |
3546 | len = HOST_NAME_MAX; | |
3547 | } | |
3548 | ||
3549 | /* Unfortunately, gethostname() below does not guarantee a | |
3550 | * NULL terminated string. Therefore, allocate one byte more | |
3551 | * to be sure. */ | |
3552 | hostname = g_new0(char, len + 1); | |
3553 | ||
3554 | if (gethostname(hostname, len) < 0) { | |
3555 | error_setg_errno(errp, errno, | |
3556 | "cannot get hostname"); | |
3557 | return NULL; | |
3558 | } | |
3559 | ||
3560 | return g_steal_pointer(&hostname); | |
3561 | } |