Merge remote-tracking branch 'remotes/vivier2/tags/linux-user-for-5.2-pull-request...
[qemu.git] / qga / commands-posix.c
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 "qemu-common.h"
20 #include "guest-agent-core.h"
21 #include "qga-qapi-commands.h"
22 #include "qapi/error.h"
23 #include "qapi/qmp/qerror.h"
24 #include "qemu/queue.h"
25 #include "qemu/host-utils.h"
26 #include "qemu/sockets.h"
27 #include "qemu/base64.h"
28 #include "qemu/cutils.h"
29 #include "commands-common.h"
30
31 #ifdef HAVE_UTMPX
32 #include <utmpx.h>
33 #endif
34
35 #ifndef CONFIG_HAS_ENVIRON
36 #ifdef __APPLE__
37 #include <crt_externs.h>
38 #define environ (*_NSGetEnviron())
39 #else
40 extern char **environ;
41 #endif
42 #endif
43
44 #if defined(__linux__)
45 #include <mntent.h>
46 #include <linux/fs.h>
47 #include <ifaddrs.h>
48 #include <arpa/inet.h>
49 #include <sys/socket.h>
50 #include <net/if.h>
51 #include <sys/statvfs.h>
52
53 #ifdef CONFIG_LIBUDEV
54 #include <libudev.h>
55 #endif
56
57 #ifdef FIFREEZE
58 #define CONFIG_FSFREEZE
59 #endif
60 #ifdef FITRIM
61 #define CONFIG_FSTRIM
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 slog("guest-shutdown called, mode: %s", mode);
92 if (!has_mode || strcmp(mode, "powerdown") == 0) {
93 shutdown_flag = "-P";
94 } else if (strcmp(mode, "halt") == 0) {
95 shutdown_flag = "-H";
96 } else if (strcmp(mode, "reboot") == 0) {
97 shutdown_flag = "-r";
98 } else {
99 error_setg(errp,
100 "mode is invalid (valid values are: halt|powerdown|reboot");
101 return;
102 }
103
104 pid = fork();
105 if (pid == 0) {
106 /* child, start the shutdown */
107 setsid();
108 reopen_fd_to_null(0);
109 reopen_fd_to_null(1);
110 reopen_fd_to_null(2);
111
112 execle("/sbin/shutdown", "shutdown", "-h", shutdown_flag, "+0",
113 "hypervisor initiated shutdown", (char*)NULL, environ);
114 _exit(EXIT_FAILURE);
115 } else if (pid < 0) {
116 error_setg_errno(errp, errno, "failed to create child process");
117 return;
118 }
119
120 ga_wait_child(pid, &status, &local_err);
121 if (local_err) {
122 error_propagate(errp, local_err);
123 return;
124 }
125
126 if (!WIFEXITED(status)) {
127 error_setg(errp, "child process has terminated abnormally");
128 return;
129 }
130
131 if (WEXITSTATUS(status)) {
132 error_setg(errp, "child process has failed to shutdown");
133 return;
134 }
135
136 /* succeeded */
137 }
138
139 int64_t qmp_guest_get_time(Error **errp)
140 {
141 int ret;
142 qemu_timeval tq;
143
144 ret = qemu_gettimeofday(&tq);
145 if (ret < 0) {
146 error_setg_errno(errp, errno, "Failed to get time");
147 return -1;
148 }
149
150 return tq.tv_sec * 1000000000LL + tq.tv_usec * 1000;
151 }
152
153 void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp)
154 {
155 int ret;
156 int status;
157 pid_t pid;
158 Error *local_err = NULL;
159 struct timeval tv;
160 static const char hwclock_path[] = "/sbin/hwclock";
161 static int hwclock_available = -1;
162
163 if (hwclock_available < 0) {
164 hwclock_available = (access(hwclock_path, X_OK) == 0);
165 }
166
167 if (!hwclock_available) {
168 error_setg(errp, QERR_UNSUPPORTED);
169 return;
170 }
171
172 /* If user has passed a time, validate and set it. */
173 if (has_time) {
174 GDate date = { 0, };
175
176 /* year-2038 will overflow in case time_t is 32bit */
177 if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) {
178 error_setg(errp, "Time %" PRId64 " is too large", time_ns);
179 return;
180 }
181
182 tv.tv_sec = time_ns / 1000000000;
183 tv.tv_usec = (time_ns % 1000000000) / 1000;
184 g_date_set_time_t(&date, tv.tv_sec);
185 if (date.year < 1970 || date.year >= 2070) {
186 error_setg_errno(errp, errno, "Invalid time");
187 return;
188 }
189
190 ret = settimeofday(&tv, NULL);
191 if (ret < 0) {
192 error_setg_errno(errp, errno, "Failed to set time to guest");
193 return;
194 }
195 }
196
197 /* Now, if user has passed a time to set and the system time is set, we
198 * just need to synchronize the hardware clock. However, if no time was
199 * passed, user is requesting the opposite: set the system time from the
200 * hardware clock (RTC). */
201 pid = fork();
202 if (pid == 0) {
203 setsid();
204 reopen_fd_to_null(0);
205 reopen_fd_to_null(1);
206 reopen_fd_to_null(2);
207
208 /* Use '/sbin/hwclock -w' to set RTC from the system time,
209 * or '/sbin/hwclock -s' to set the system time from RTC. */
210 execle(hwclock_path, "hwclock", has_time ? "-w" : "-s",
211 NULL, environ);
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 Error *local_err = NULL;
344 int oflag;
345
346 oflag = find_open_flag(mode, &local_err);
347 if (local_err == NULL) {
348 int fd;
349
350 /* If the caller wants / allows creation of a new file, we implement it
351 * with a two step process: open() + (open() / fchmod()).
352 *
353 * First we insist on creating the file exclusively as a new file. If
354 * that succeeds, we're free to set any file-mode bits on it. (The
355 * motivation is that we want to set those file-mode bits independently
356 * of the current umask.)
357 *
358 * If the exclusive creation fails because the file already exists
359 * (EEXIST is not possible for any other reason), we just attempt to
360 * open the file, but in this case we won't be allowed to change the
361 * file-mode bits on the preexistent file.
362 *
363 * The pathname should never disappear between the two open()s in
364 * practice. If it happens, then someone very likely tried to race us.
365 * In this case just go ahead and report the ENOENT from the second
366 * open() to the caller.
367 *
368 * If the caller wants to open a preexistent file, then the first
369 * open() is decisive and its third argument is ignored, and the second
370 * open() and the fchmod() are never called.
371 */
372 fd = open(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0);
373 if (fd == -1 && errno == EEXIST) {
374 oflag &= ~(unsigned)O_CREAT;
375 fd = open(path, oflag);
376 }
377
378 if (fd == -1) {
379 error_setg_errno(&local_err, errno, "failed to open file '%s' "
380 "(mode: '%s')", path, mode);
381 } else {
382 qemu_set_cloexec(fd);
383
384 if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) {
385 error_setg_errno(&local_err, errno, "failed to set permission "
386 "0%03o on new file '%s' (mode: '%s')",
387 (unsigned)DEFAULT_NEW_FILE_MODE, path, mode);
388 } else {
389 FILE *f;
390
391 f = fdopen(fd, mode);
392 if (f == NULL) {
393 error_setg_errno(&local_err, errno, "failed to associate "
394 "stdio stream with file descriptor %d, "
395 "file '%s' (mode: '%s')", fd, path, mode);
396 } else {
397 return f;
398 }
399 }
400
401 close(fd);
402 if (oflag & O_CREAT) {
403 unlink(path);
404 }
405 }
406 }
407
408 error_propagate(errp, local_err);
409 return NULL;
410 }
411
412 int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode,
413 Error **errp)
414 {
415 FILE *fh;
416 Error *local_err = NULL;
417 int64_t handle;
418
419 if (!has_mode) {
420 mode = "r";
421 }
422 slog("guest-file-open called, filepath: %s, mode: %s", path, mode);
423 fh = safe_open_or_create(path, mode, &local_err);
424 if (local_err != NULL) {
425 error_propagate(errp, local_err);
426 return -1;
427 }
428
429 /* set fd non-blocking to avoid common use cases (like reading from a
430 * named pipe) from hanging the agent
431 */
432 qemu_set_nonblock(fileno(fh));
433
434 handle = guest_file_handle_add(fh, errp);
435 if (handle < 0) {
436 fclose(fh);
437 return -1;
438 }
439
440 slog("guest-file-open, handle: %" PRId64, handle);
441 return handle;
442 }
443
444 void qmp_guest_file_close(int64_t handle, Error **errp)
445 {
446 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
447 int ret;
448
449 slog("guest-file-close called, handle: %" PRId64, handle);
450 if (!gfh) {
451 return;
452 }
453
454 ret = fclose(gfh->fh);
455 if (ret == EOF) {
456 error_setg_errno(errp, errno, "failed to close handle");
457 return;
458 }
459
460 QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next);
461 g_free(gfh);
462 }
463
464 GuestFileRead *guest_file_read_unsafe(GuestFileHandle *gfh,
465 int64_t count, Error **errp)
466 {
467 GuestFileRead *read_data = NULL;
468 guchar *buf;
469 FILE *fh = gfh->fh;
470 size_t read_count;
471
472 /* explicitly flush when switching from writing to reading */
473 if (gfh->state == RW_STATE_WRITING) {
474 int ret = fflush(fh);
475 if (ret == EOF) {
476 error_setg_errno(errp, errno, "failed to flush file");
477 return NULL;
478 }
479 gfh->state = RW_STATE_NEW;
480 }
481
482 buf = g_malloc0(count+1);
483 read_count = fread(buf, 1, count, fh);
484 if (ferror(fh)) {
485 error_setg_errno(errp, errno, "failed to read file");
486 } else {
487 buf[read_count] = 0;
488 read_data = g_new0(GuestFileRead, 1);
489 read_data->count = read_count;
490 read_data->eof = feof(fh);
491 if (read_count) {
492 read_data->buf_b64 = g_base64_encode(buf, read_count);
493 }
494 gfh->state = RW_STATE_READING;
495 }
496 g_free(buf);
497 clearerr(fh);
498
499 return read_data;
500 }
501
502 GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64,
503 bool has_count, int64_t count,
504 Error **errp)
505 {
506 GuestFileWrite *write_data = NULL;
507 guchar *buf;
508 gsize buf_len;
509 int write_count;
510 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
511 FILE *fh;
512
513 if (!gfh) {
514 return NULL;
515 }
516
517 fh = gfh->fh;
518
519 if (gfh->state == RW_STATE_READING) {
520 int ret = fseek(fh, 0, SEEK_CUR);
521 if (ret == -1) {
522 error_setg_errno(errp, errno, "failed to seek file");
523 return NULL;
524 }
525 gfh->state = RW_STATE_NEW;
526 }
527
528 buf = qbase64_decode(buf_b64, -1, &buf_len, errp);
529 if (!buf) {
530 return NULL;
531 }
532
533 if (!has_count) {
534 count = buf_len;
535 } else if (count < 0 || count > buf_len) {
536 error_setg(errp, "value '%" PRId64 "' is invalid for argument count",
537 count);
538 g_free(buf);
539 return NULL;
540 }
541
542 write_count = fwrite(buf, 1, count, fh);
543 if (ferror(fh)) {
544 error_setg_errno(errp, errno, "failed to write to file");
545 slog("guest-file-write failed, handle: %" PRId64, handle);
546 } else {
547 write_data = g_new0(GuestFileWrite, 1);
548 write_data->count = write_count;
549 write_data->eof = feof(fh);
550 gfh->state = RW_STATE_WRITING;
551 }
552 g_free(buf);
553 clearerr(fh);
554
555 return write_data;
556 }
557
558 struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset,
559 GuestFileWhence *whence_code,
560 Error **errp)
561 {
562 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
563 GuestFileSeek *seek_data = NULL;
564 FILE *fh;
565 int ret;
566 int whence;
567 Error *err = NULL;
568
569 if (!gfh) {
570 return NULL;
571 }
572
573 /* We stupidly exposed 'whence':'int' in our qapi */
574 whence = ga_parse_whence(whence_code, &err);
575 if (err) {
576 error_propagate(errp, err);
577 return NULL;
578 }
579
580 fh = gfh->fh;
581 ret = fseek(fh, offset, whence);
582 if (ret == -1) {
583 error_setg_errno(errp, errno, "failed to seek file");
584 if (errno == ESPIPE) {
585 /* file is non-seekable, stdio shouldn't be buffering anyways */
586 gfh->state = RW_STATE_NEW;
587 }
588 } else {
589 seek_data = g_new0(GuestFileSeek, 1);
590 seek_data->position = ftell(fh);
591 seek_data->eof = feof(fh);
592 gfh->state = RW_STATE_NEW;
593 }
594 clearerr(fh);
595
596 return seek_data;
597 }
598
599 void qmp_guest_file_flush(int64_t handle, Error **errp)
600 {
601 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
602 FILE *fh;
603 int ret;
604
605 if (!gfh) {
606 return;
607 }
608
609 fh = gfh->fh;
610 ret = fflush(fh);
611 if (ret == EOF) {
612 error_setg_errno(errp, errno, "failed to flush file");
613 } else {
614 gfh->state = RW_STATE_NEW;
615 }
616 }
617
618 /* linux-specific implementations. avoid this if at all possible. */
619 #if defined(__linux__)
620
621 #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM)
622 typedef struct FsMount {
623 char *dirname;
624 char *devtype;
625 unsigned int devmajor, devminor;
626 QTAILQ_ENTRY(FsMount) next;
627 } FsMount;
628
629 typedef QTAILQ_HEAD(FsMountList, FsMount) FsMountList;
630
631 static void free_fs_mount_list(FsMountList *mounts)
632 {
633 FsMount *mount, *temp;
634
635 if (!mounts) {
636 return;
637 }
638
639 QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) {
640 QTAILQ_REMOVE(mounts, mount, next);
641 g_free(mount->dirname);
642 g_free(mount->devtype);
643 g_free(mount);
644 }
645 }
646
647 static int dev_major_minor(const char *devpath,
648 unsigned int *devmajor, unsigned int *devminor)
649 {
650 struct stat st;
651
652 *devmajor = 0;
653 *devminor = 0;
654
655 if (stat(devpath, &st) < 0) {
656 slog("failed to stat device file '%s': %s", devpath, strerror(errno));
657 return -1;
658 }
659 if (S_ISDIR(st.st_mode)) {
660 /* It is bind mount */
661 return -2;
662 }
663 if (S_ISBLK(st.st_mode)) {
664 *devmajor = major(st.st_rdev);
665 *devminor = minor(st.st_rdev);
666 return 0;
667 }
668 return -1;
669 }
670
671 /*
672 * Walk the mount table and build a list of local file systems
673 */
674 static void build_fs_mount_list_from_mtab(FsMountList *mounts, Error **errp)
675 {
676 struct mntent *ment;
677 FsMount *mount;
678 char const *mtab = "/proc/self/mounts";
679 FILE *fp;
680 unsigned int devmajor, devminor;
681
682 fp = setmntent(mtab, "r");
683 if (!fp) {
684 error_setg(errp, "failed to open mtab file: '%s'", mtab);
685 return;
686 }
687
688 while ((ment = getmntent(fp))) {
689 /*
690 * An entry which device name doesn't start with a '/' is
691 * either a dummy file system or a network file system.
692 * Add special handling for smbfs and cifs as is done by
693 * coreutils as well.
694 */
695 if ((ment->mnt_fsname[0] != '/') ||
696 (strcmp(ment->mnt_type, "smbfs") == 0) ||
697 (strcmp(ment->mnt_type, "cifs") == 0)) {
698 continue;
699 }
700 if (dev_major_minor(ment->mnt_fsname, &devmajor, &devminor) == -2) {
701 /* Skip bind mounts */
702 continue;
703 }
704
705 mount = g_new0(FsMount, 1);
706 mount->dirname = g_strdup(ment->mnt_dir);
707 mount->devtype = g_strdup(ment->mnt_type);
708 mount->devmajor = devmajor;
709 mount->devminor = devminor;
710
711 QTAILQ_INSERT_TAIL(mounts, mount, next);
712 }
713
714 endmntent(fp);
715 }
716
717 static void decode_mntname(char *name, int len)
718 {
719 int i, j = 0;
720 for (i = 0; i <= len; i++) {
721 if (name[i] != '\\') {
722 name[j++] = name[i];
723 } else if (name[i + 1] == '\\') {
724 name[j++] = '\\';
725 i++;
726 } else if (name[i + 1] >= '0' && name[i + 1] <= '3' &&
727 name[i + 2] >= '0' && name[i + 2] <= '7' &&
728 name[i + 3] >= '0' && name[i + 3] <= '7') {
729 name[j++] = (name[i + 1] - '0') * 64 +
730 (name[i + 2] - '0') * 8 +
731 (name[i + 3] - '0');
732 i += 3;
733 } else {
734 name[j++] = name[i];
735 }
736 }
737 }
738
739 static void build_fs_mount_list(FsMountList *mounts, Error **errp)
740 {
741 FsMount *mount;
742 char const *mountinfo = "/proc/self/mountinfo";
743 FILE *fp;
744 char *line = NULL, *dash;
745 size_t n;
746 char check;
747 unsigned int devmajor, devminor;
748 int ret, dir_s, dir_e, type_s, type_e, dev_s, dev_e;
749
750 fp = fopen(mountinfo, "r");
751 if (!fp) {
752 build_fs_mount_list_from_mtab(mounts, errp);
753 return;
754 }
755
756 while (getline(&line, &n, fp) != -1) {
757 ret = sscanf(line, "%*u %*u %u:%u %*s %n%*s%n%c",
758 &devmajor, &devminor, &dir_s, &dir_e, &check);
759 if (ret < 3) {
760 continue;
761 }
762 dash = strstr(line + dir_e, " - ");
763 if (!dash) {
764 continue;
765 }
766 ret = sscanf(dash, " - %n%*s%n %n%*s%n%c",
767 &type_s, &type_e, &dev_s, &dev_e, &check);
768 if (ret < 1) {
769 continue;
770 }
771 line[dir_e] = 0;
772 dash[type_e] = 0;
773 dash[dev_e] = 0;
774 decode_mntname(line + dir_s, dir_e - dir_s);
775 decode_mntname(dash + dev_s, dev_e - dev_s);
776 if (devmajor == 0) {
777 /* btrfs reports major number = 0 */
778 if (strcmp("btrfs", dash + type_s) != 0 ||
779 dev_major_minor(dash + dev_s, &devmajor, &devminor) < 0) {
780 continue;
781 }
782 }
783
784 mount = g_new0(FsMount, 1);
785 mount->dirname = g_strdup(line + dir_s);
786 mount->devtype = g_strdup(dash + type_s);
787 mount->devmajor = devmajor;
788 mount->devminor = devminor;
789
790 QTAILQ_INSERT_TAIL(mounts, mount, next);
791 }
792 free(line);
793
794 fclose(fp);
795 }
796 #endif
797
798 #if defined(CONFIG_FSFREEZE)
799
800 static char *get_pci_driver(char const *syspath, int pathlen, Error **errp)
801 {
802 char *path;
803 char *dpath;
804 char *driver = NULL;
805 char buf[PATH_MAX];
806 ssize_t len;
807
808 path = g_strndup(syspath, pathlen);
809 dpath = g_strdup_printf("%s/driver", path);
810 len = readlink(dpath, buf, sizeof(buf) - 1);
811 if (len != -1) {
812 buf[len] = 0;
813 driver = g_path_get_basename(buf);
814 }
815 g_free(dpath);
816 g_free(path);
817 return driver;
818 }
819
820 static int compare_uint(const void *_a, const void *_b)
821 {
822 unsigned int a = *(unsigned int *)_a;
823 unsigned int b = *(unsigned int *)_b;
824
825 return a < b ? -1 : a > b ? 1 : 0;
826 }
827
828 /* Walk the specified sysfs and build a sorted list of host or ata numbers */
829 static int build_hosts(char const *syspath, char const *host, bool ata,
830 unsigned int *hosts, int hosts_max, Error **errp)
831 {
832 char *path;
833 DIR *dir;
834 struct dirent *entry;
835 int i = 0;
836
837 path = g_strndup(syspath, host - syspath);
838 dir = opendir(path);
839 if (!dir) {
840 error_setg_errno(errp, errno, "opendir(\"%s\")", path);
841 g_free(path);
842 return -1;
843 }
844
845 while (i < hosts_max) {
846 entry = readdir(dir);
847 if (!entry) {
848 break;
849 }
850 if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) {
851 ++i;
852 } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) {
853 ++i;
854 }
855 }
856
857 qsort(hosts, i, sizeof(hosts[0]), compare_uint);
858
859 g_free(path);
860 closedir(dir);
861 return i;
862 }
863
864 /* Store disk device info specified by @sysfs into @fs */
865 static void build_guest_fsinfo_for_real_device(char const *syspath,
866 GuestFilesystemInfo *fs,
867 Error **errp)
868 {
869 unsigned int pci[4], host, hosts[8], tgt[3];
870 int i, nhosts = 0, pcilen;
871 GuestDiskAddress *disk;
872 GuestPCIAddress *pciaddr;
873 GuestDiskAddressList *list = NULL;
874 bool has_ata = false, has_host = false, has_tgt = false;
875 char *p, *q, *driver = NULL;
876 #ifdef CONFIG_LIBUDEV
877 struct udev *udev = NULL;
878 struct udev_device *udevice = NULL;
879 #endif
880
881 p = strstr(syspath, "/devices/pci");
882 if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n",
883 pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) {
884 g_debug("only pci device is supported: sysfs path '%s'", syspath);
885 return;
886 }
887
888 p += 12 + pcilen;
889 while (true) {
890 driver = get_pci_driver(syspath, p - syspath, errp);
891 if (driver && (g_str_equal(driver, "ata_piix") ||
892 g_str_equal(driver, "sym53c8xx") ||
893 g_str_equal(driver, "virtio-pci") ||
894 g_str_equal(driver, "ahci"))) {
895 break;
896 }
897
898 g_free(driver);
899 if (sscanf(p, "/%x:%x:%x.%x%n",
900 pci, pci + 1, pci + 2, pci + 3, &pcilen) == 4) {
901 p += pcilen;
902 continue;
903 }
904
905 g_debug("unsupported driver or sysfs path '%s'", syspath);
906 return;
907 }
908
909 p = strstr(syspath, "/target");
910 if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u",
911 tgt, tgt + 1, tgt + 2) == 3) {
912 has_tgt = true;
913 }
914
915 p = strstr(syspath, "/ata");
916 if (p) {
917 q = p + 4;
918 has_ata = true;
919 } else {
920 p = strstr(syspath, "/host");
921 q = p + 5;
922 }
923 if (p && sscanf(q, "%u", &host) == 1) {
924 has_host = true;
925 nhosts = build_hosts(syspath, p, has_ata, hosts,
926 ARRAY_SIZE(hosts), errp);
927 if (nhosts < 0) {
928 goto cleanup;
929 }
930 }
931
932 pciaddr = g_malloc0(sizeof(*pciaddr));
933 pciaddr->domain = pci[0];
934 pciaddr->bus = pci[1];
935 pciaddr->slot = pci[2];
936 pciaddr->function = pci[3];
937
938 disk = g_malloc0(sizeof(*disk));
939 disk->pci_controller = pciaddr;
940
941 list = g_malloc0(sizeof(*list));
942 list->value = disk;
943
944 #ifdef CONFIG_LIBUDEV
945 udev = udev_new();
946 udevice = udev_device_new_from_syspath(udev, syspath);
947 if (udev == NULL || udevice == NULL) {
948 g_debug("failed to query udev");
949 } else {
950 const char *devnode, *serial;
951 devnode = udev_device_get_devnode(udevice);
952 if (devnode != NULL) {
953 disk->dev = g_strdup(devnode);
954 disk->has_dev = true;
955 }
956 serial = udev_device_get_property_value(udevice, "ID_SERIAL");
957 if (serial != NULL && *serial != 0) {
958 disk->serial = g_strdup(serial);
959 disk->has_serial = true;
960 }
961 }
962 #endif
963
964 if (strcmp(driver, "ata_piix") == 0) {
965 /* a host per ide bus, target*:0:<unit>:0 */
966 if (!has_host || !has_tgt) {
967 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
968 goto cleanup;
969 }
970 for (i = 0; i < nhosts; i++) {
971 if (host == hosts[i]) {
972 disk->bus_type = GUEST_DISK_BUS_TYPE_IDE;
973 disk->bus = i;
974 disk->unit = tgt[1];
975 break;
976 }
977 }
978 if (i >= nhosts) {
979 g_debug("no host for '%s' (driver '%s')", syspath, driver);
980 goto cleanup;
981 }
982 } else if (strcmp(driver, "sym53c8xx") == 0) {
983 /* scsi(LSI Logic): target*:0:<unit>:0 */
984 if (!has_tgt) {
985 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
986 goto cleanup;
987 }
988 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
989 disk->unit = tgt[1];
990 } else if (strcmp(driver, "virtio-pci") == 0) {
991 if (has_tgt) {
992 /* virtio-scsi: target*:0:0:<unit> */
993 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
994 disk->unit = tgt[2];
995 } else {
996 /* virtio-blk: 1 disk per 1 device */
997 disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO;
998 }
999 } else if (strcmp(driver, "ahci") == 0) {
1000 /* ahci: 1 host per 1 unit */
1001 if (!has_host || !has_tgt) {
1002 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
1003 goto cleanup;
1004 }
1005 for (i = 0; i < nhosts; i++) {
1006 if (host == hosts[i]) {
1007 disk->unit = i;
1008 disk->bus_type = GUEST_DISK_BUS_TYPE_SATA;
1009 break;
1010 }
1011 }
1012 if (i >= nhosts) {
1013 g_debug("no host for '%s' (driver '%s')", syspath, driver);
1014 goto cleanup;
1015 }
1016 } else {
1017 g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath);
1018 goto cleanup;
1019 }
1020
1021 list->next = fs->disk;
1022 fs->disk = list;
1023 goto out;
1024
1025 cleanup:
1026 if (list) {
1027 qapi_free_GuestDiskAddressList(list);
1028 }
1029 out:
1030 g_free(driver);
1031 #ifdef CONFIG_LIBUDEV
1032 udev_unref(udev);
1033 udev_device_unref(udevice);
1034 #endif
1035 return;
1036 }
1037
1038 static void build_guest_fsinfo_for_device(char const *devpath,
1039 GuestFilesystemInfo *fs,
1040 Error **errp);
1041
1042 /* Store a list of slave devices of virtual volume specified by @syspath into
1043 * @fs */
1044 static void build_guest_fsinfo_for_virtual_device(char const *syspath,
1045 GuestFilesystemInfo *fs,
1046 Error **errp)
1047 {
1048 Error *err = NULL;
1049 DIR *dir;
1050 char *dirpath;
1051 struct dirent *entry;
1052
1053 dirpath = g_strdup_printf("%s/slaves", syspath);
1054 dir = opendir(dirpath);
1055 if (!dir) {
1056 if (errno != ENOENT) {
1057 error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath);
1058 }
1059 g_free(dirpath);
1060 return;
1061 }
1062
1063 for (;;) {
1064 errno = 0;
1065 entry = readdir(dir);
1066 if (entry == NULL) {
1067 if (errno) {
1068 error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath);
1069 }
1070 break;
1071 }
1072
1073 if (entry->d_type == DT_LNK) {
1074 char *path;
1075
1076 g_debug(" slave device '%s'", entry->d_name);
1077 path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name);
1078 build_guest_fsinfo_for_device(path, fs, &err);
1079 g_free(path);
1080
1081 if (err) {
1082 error_propagate(errp, err);
1083 break;
1084 }
1085 }
1086 }
1087
1088 g_free(dirpath);
1089 closedir(dir);
1090 }
1091
1092 /* Dispatch to functions for virtual/real device */
1093 static void build_guest_fsinfo_for_device(char const *devpath,
1094 GuestFilesystemInfo *fs,
1095 Error **errp)
1096 {
1097 char *syspath = realpath(devpath, NULL);
1098
1099 if (!syspath) {
1100 error_setg_errno(errp, errno, "realpath(\"%s\")", devpath);
1101 return;
1102 }
1103
1104 if (!fs->name) {
1105 fs->name = g_path_get_basename(syspath);
1106 }
1107
1108 g_debug(" parse sysfs path '%s'", syspath);
1109
1110 if (strstr(syspath, "/devices/virtual/block/")) {
1111 build_guest_fsinfo_for_virtual_device(syspath, fs, errp);
1112 } else {
1113 build_guest_fsinfo_for_real_device(syspath, fs, errp);
1114 }
1115
1116 free(syspath);
1117 }
1118
1119 /* Return a list of the disk device(s)' info which @mount lies on */
1120 static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount,
1121 Error **errp)
1122 {
1123 GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs));
1124 struct statvfs buf;
1125 unsigned long used, nonroot_total, fr_size;
1126 char *devpath = g_strdup_printf("/sys/dev/block/%u:%u",
1127 mount->devmajor, mount->devminor);
1128
1129 fs->mountpoint = g_strdup(mount->dirname);
1130 fs->type = g_strdup(mount->devtype);
1131 build_guest_fsinfo_for_device(devpath, fs, errp);
1132
1133 if (statvfs(fs->mountpoint, &buf) == 0) {
1134 fr_size = buf.f_frsize;
1135 used = buf.f_blocks - buf.f_bfree;
1136 nonroot_total = used + buf.f_bavail;
1137 fs->used_bytes = used * fr_size;
1138 fs->total_bytes = nonroot_total * fr_size;
1139
1140 fs->has_total_bytes = true;
1141 fs->has_used_bytes = true;
1142 }
1143
1144 g_free(devpath);
1145
1146 return fs;
1147 }
1148
1149 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
1150 {
1151 FsMountList mounts;
1152 struct FsMount *mount;
1153 GuestFilesystemInfoList *new, *ret = NULL;
1154 Error *local_err = NULL;
1155
1156 QTAILQ_INIT(&mounts);
1157 build_fs_mount_list(&mounts, &local_err);
1158 if (local_err) {
1159 error_propagate(errp, local_err);
1160 return NULL;
1161 }
1162
1163 QTAILQ_FOREACH(mount, &mounts, next) {
1164 g_debug("Building guest fsinfo for '%s'", mount->dirname);
1165
1166 new = g_malloc0(sizeof(*ret));
1167 new->value = build_guest_fsinfo(mount, &local_err);
1168 new->next = ret;
1169 ret = new;
1170 if (local_err) {
1171 error_propagate(errp, local_err);
1172 qapi_free_GuestFilesystemInfoList(ret);
1173 ret = NULL;
1174 break;
1175 }
1176 }
1177
1178 free_fs_mount_list(&mounts);
1179 return ret;
1180 }
1181
1182
1183 typedef enum {
1184 FSFREEZE_HOOK_THAW = 0,
1185 FSFREEZE_HOOK_FREEZE,
1186 } FsfreezeHookArg;
1187
1188 static const char *fsfreeze_hook_arg_string[] = {
1189 "thaw",
1190 "freeze",
1191 };
1192
1193 static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **errp)
1194 {
1195 int status;
1196 pid_t pid;
1197 const char *hook;
1198 const char *arg_str = fsfreeze_hook_arg_string[arg];
1199 Error *local_err = NULL;
1200
1201 hook = ga_fsfreeze_hook(ga_state);
1202 if (!hook) {
1203 return;
1204 }
1205 if (access(hook, X_OK) != 0) {
1206 error_setg_errno(errp, errno, "can't access fsfreeze hook '%s'", hook);
1207 return;
1208 }
1209
1210 slog("executing fsfreeze hook with arg '%s'", arg_str);
1211 pid = fork();
1212 if (pid == 0) {
1213 setsid();
1214 reopen_fd_to_null(0);
1215 reopen_fd_to_null(1);
1216 reopen_fd_to_null(2);
1217
1218 execle(hook, hook, arg_str, NULL, environ);
1219 _exit(EXIT_FAILURE);
1220 } else if (pid < 0) {
1221 error_setg_errno(errp, errno, "failed to create child process");
1222 return;
1223 }
1224
1225 ga_wait_child(pid, &status, &local_err);
1226 if (local_err) {
1227 error_propagate(errp, local_err);
1228 return;
1229 }
1230
1231 if (!WIFEXITED(status)) {
1232 error_setg(errp, "fsfreeze hook has terminated abnormally");
1233 return;
1234 }
1235
1236 status = WEXITSTATUS(status);
1237 if (status) {
1238 error_setg(errp, "fsfreeze hook has failed with status %d", status);
1239 return;
1240 }
1241 }
1242
1243 /*
1244 * Return status of freeze/thaw
1245 */
1246 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
1247 {
1248 if (ga_is_frozen(ga_state)) {
1249 return GUEST_FSFREEZE_STATUS_FROZEN;
1250 }
1251
1252 return GUEST_FSFREEZE_STATUS_THAWED;
1253 }
1254
1255 int64_t qmp_guest_fsfreeze_freeze(Error **errp)
1256 {
1257 return qmp_guest_fsfreeze_freeze_list(false, NULL, errp);
1258 }
1259
1260 /*
1261 * Walk list of mounted file systems in the guest, and freeze the ones which
1262 * are real local file systems.
1263 */
1264 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
1265 strList *mountpoints,
1266 Error **errp)
1267 {
1268 int ret = 0, i = 0;
1269 strList *list;
1270 FsMountList mounts;
1271 struct FsMount *mount;
1272 Error *local_err = NULL;
1273 int fd;
1274
1275 slog("guest-fsfreeze called");
1276
1277 execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err);
1278 if (local_err) {
1279 error_propagate(errp, local_err);
1280 return -1;
1281 }
1282
1283 QTAILQ_INIT(&mounts);
1284 build_fs_mount_list(&mounts, &local_err);
1285 if (local_err) {
1286 error_propagate(errp, local_err);
1287 return -1;
1288 }
1289
1290 /* cannot risk guest agent blocking itself on a write in this state */
1291 ga_set_frozen(ga_state);
1292
1293 QTAILQ_FOREACH_REVERSE(mount, &mounts, next) {
1294 /* To issue fsfreeze in the reverse order of mounts, check if the
1295 * mount is listed in the list here */
1296 if (has_mountpoints) {
1297 for (list = mountpoints; list; list = list->next) {
1298 if (strcmp(list->value, mount->dirname) == 0) {
1299 break;
1300 }
1301 }
1302 if (!list) {
1303 continue;
1304 }
1305 }
1306
1307 fd = qemu_open(mount->dirname, O_RDONLY);
1308 if (fd == -1) {
1309 error_setg_errno(errp, errno, "failed to open %s", mount->dirname);
1310 goto error;
1311 }
1312
1313 /* we try to cull filesystems we know won't work in advance, but other
1314 * filesystems may not implement fsfreeze for less obvious reasons.
1315 * these will report EOPNOTSUPP. we simply ignore these when tallying
1316 * the number of frozen filesystems.
1317 * if a filesystem is mounted more than once (aka bind mount) a
1318 * consecutive attempt to freeze an already frozen filesystem will
1319 * return EBUSY.
1320 *
1321 * any other error means a failure to freeze a filesystem we
1322 * expect to be freezable, so return an error in those cases
1323 * and return system to thawed state.
1324 */
1325 ret = ioctl(fd, FIFREEZE);
1326 if (ret == -1) {
1327 if (errno != EOPNOTSUPP && errno != EBUSY) {
1328 error_setg_errno(errp, errno, "failed to freeze %s",
1329 mount->dirname);
1330 close(fd);
1331 goto error;
1332 }
1333 } else {
1334 i++;
1335 }
1336 close(fd);
1337 }
1338
1339 free_fs_mount_list(&mounts);
1340 /* We may not issue any FIFREEZE here.
1341 * Just unset ga_state here and ready for the next call.
1342 */
1343 if (i == 0) {
1344 ga_unset_frozen(ga_state);
1345 }
1346 return i;
1347
1348 error:
1349 free_fs_mount_list(&mounts);
1350 qmp_guest_fsfreeze_thaw(NULL);
1351 return 0;
1352 }
1353
1354 /*
1355 * Walk list of frozen file systems in the guest, and thaw them.
1356 */
1357 int64_t qmp_guest_fsfreeze_thaw(Error **errp)
1358 {
1359 int ret;
1360 FsMountList mounts;
1361 FsMount *mount;
1362 int fd, i = 0, logged;
1363 Error *local_err = NULL;
1364
1365 QTAILQ_INIT(&mounts);
1366 build_fs_mount_list(&mounts, &local_err);
1367 if (local_err) {
1368 error_propagate(errp, local_err);
1369 return 0;
1370 }
1371
1372 QTAILQ_FOREACH(mount, &mounts, next) {
1373 logged = false;
1374 fd = qemu_open(mount->dirname, O_RDONLY);
1375 if (fd == -1) {
1376 continue;
1377 }
1378 /* we have no way of knowing whether a filesystem was actually unfrozen
1379 * as a result of a successful call to FITHAW, only that if an error
1380 * was returned the filesystem was *not* unfrozen by that particular
1381 * call.
1382 *
1383 * since multiple preceding FIFREEZEs require multiple calls to FITHAW
1384 * to unfreeze, continuing issuing FITHAW until an error is returned,
1385 * in which case either the filesystem is in an unfreezable state, or,
1386 * more likely, it was thawed previously (and remains so afterward).
1387 *
1388 * also, since the most recent successful call is the one that did
1389 * the actual unfreeze, we can use this to provide an accurate count
1390 * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which
1391 * may * be useful for determining whether a filesystem was unfrozen
1392 * during the freeze/thaw phase by a process other than qemu-ga.
1393 */
1394 do {
1395 ret = ioctl(fd, FITHAW);
1396 if (ret == 0 && !logged) {
1397 i++;
1398 logged = true;
1399 }
1400 } while (ret == 0);
1401 close(fd);
1402 }
1403
1404 ga_unset_frozen(ga_state);
1405 free_fs_mount_list(&mounts);
1406
1407 execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, errp);
1408
1409 return i;
1410 }
1411
1412 static void guest_fsfreeze_cleanup(void)
1413 {
1414 Error *err = NULL;
1415
1416 if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) {
1417 qmp_guest_fsfreeze_thaw(&err);
1418 if (err) {
1419 slog("failed to clean up frozen filesystems: %s",
1420 error_get_pretty(err));
1421 error_free(err);
1422 }
1423 }
1424 }
1425 #endif /* CONFIG_FSFREEZE */
1426
1427 #if defined(CONFIG_FSTRIM)
1428 /*
1429 * Walk list of mounted file systems in the guest, and trim them.
1430 */
1431 GuestFilesystemTrimResponse *
1432 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
1433 {
1434 GuestFilesystemTrimResponse *response;
1435 GuestFilesystemTrimResultList *list;
1436 GuestFilesystemTrimResult *result;
1437 int ret = 0;
1438 FsMountList mounts;
1439 struct FsMount *mount;
1440 int fd;
1441 Error *local_err = NULL;
1442 struct fstrim_range r;
1443
1444 slog("guest-fstrim called");
1445
1446 QTAILQ_INIT(&mounts);
1447 build_fs_mount_list(&mounts, &local_err);
1448 if (local_err) {
1449 error_propagate(errp, local_err);
1450 return NULL;
1451 }
1452
1453 response = g_malloc0(sizeof(*response));
1454
1455 QTAILQ_FOREACH(mount, &mounts, next) {
1456 result = g_malloc0(sizeof(*result));
1457 result->path = g_strdup(mount->dirname);
1458
1459 list = g_malloc0(sizeof(*list));
1460 list->value = result;
1461 list->next = response->paths;
1462 response->paths = list;
1463
1464 fd = qemu_open(mount->dirname, O_RDONLY);
1465 if (fd == -1) {
1466 result->error = g_strdup_printf("failed to open: %s",
1467 strerror(errno));
1468 result->has_error = true;
1469 continue;
1470 }
1471
1472 /* We try to cull filesystems we know won't work in advance, but other
1473 * filesystems may not implement fstrim for less obvious reasons.
1474 * These will report EOPNOTSUPP; while in some other cases ENOTTY
1475 * will be reported (e.g. CD-ROMs).
1476 * Any other error means an unexpected error.
1477 */
1478 r.start = 0;
1479 r.len = -1;
1480 r.minlen = has_minimum ? minimum : 0;
1481 ret = ioctl(fd, FITRIM, &r);
1482 if (ret == -1) {
1483 result->has_error = true;
1484 if (errno == ENOTTY || errno == EOPNOTSUPP) {
1485 result->error = g_strdup("trim not supported");
1486 } else {
1487 result->error = g_strdup_printf("failed to trim: %s",
1488 strerror(errno));
1489 }
1490 close(fd);
1491 continue;
1492 }
1493
1494 result->has_minimum = true;
1495 result->minimum = r.minlen;
1496 result->has_trimmed = true;
1497 result->trimmed = r.len;
1498 close(fd);
1499 }
1500
1501 free_fs_mount_list(&mounts);
1502 return response;
1503 }
1504 #endif /* CONFIG_FSTRIM */
1505
1506
1507 #define LINUX_SYS_STATE_FILE "/sys/power/state"
1508 #define SUSPEND_SUPPORTED 0
1509 #define SUSPEND_NOT_SUPPORTED 1
1510
1511 typedef enum {
1512 SUSPEND_MODE_DISK = 0,
1513 SUSPEND_MODE_RAM = 1,
1514 SUSPEND_MODE_HYBRID = 2,
1515 } SuspendMode;
1516
1517 /*
1518 * Executes a command in a child process using g_spawn_sync,
1519 * returning an int >= 0 representing the exit status of the
1520 * process.
1521 *
1522 * If the program wasn't found in path, returns -1.
1523 *
1524 * If a problem happened when creating the child process,
1525 * returns -1 and errp is set.
1526 */
1527 static int run_process_child(const char *command[], Error **errp)
1528 {
1529 int exit_status, spawn_flag;
1530 GError *g_err = NULL;
1531 bool success;
1532
1533 spawn_flag = G_SPAWN_SEARCH_PATH | G_SPAWN_STDOUT_TO_DEV_NULL |
1534 G_SPAWN_STDERR_TO_DEV_NULL;
1535
1536 success = g_spawn_sync(NULL, (char **)command, environ, spawn_flag,
1537 NULL, NULL, NULL, NULL,
1538 &exit_status, &g_err);
1539
1540 if (success) {
1541 return WEXITSTATUS(exit_status);
1542 }
1543
1544 if (g_err && (g_err->code != G_SPAWN_ERROR_NOENT)) {
1545 error_setg(errp, "failed to create child process, error '%s'",
1546 g_err->message);
1547 }
1548
1549 g_error_free(g_err);
1550 return -1;
1551 }
1552
1553 static bool systemd_supports_mode(SuspendMode mode, Error **errp)
1554 {
1555 const char *systemctl_args[3] = {"systemd-hibernate", "systemd-suspend",
1556 "systemd-hybrid-sleep"};
1557 const char *cmd[4] = {"systemctl", "status", systemctl_args[mode], NULL};
1558 int status;
1559
1560 status = run_process_child(cmd, errp);
1561
1562 /*
1563 * systemctl status uses LSB return codes so we can expect
1564 * status > 0 and be ok. To assert if the guest has support
1565 * for the selected suspend mode, status should be < 4. 4 is
1566 * the code for unknown service status, the return value when
1567 * the service does not exist. A common value is status = 3
1568 * (program is not running).
1569 */
1570 if (status > 0 && status < 4) {
1571 return true;
1572 }
1573
1574 return false;
1575 }
1576
1577 static void systemd_suspend(SuspendMode mode, Error **errp)
1578 {
1579 Error *local_err = NULL;
1580 const char *systemctl_args[3] = {"hibernate", "suspend", "hybrid-sleep"};
1581 const char *cmd[3] = {"systemctl", systemctl_args[mode], NULL};
1582 int status;
1583
1584 status = run_process_child(cmd, &local_err);
1585
1586 if (status == 0) {
1587 return;
1588 }
1589
1590 if ((status == -1) && !local_err) {
1591 error_setg(errp, "the helper program 'systemctl %s' was not found",
1592 systemctl_args[mode]);
1593 return;
1594 }
1595
1596 if (local_err) {
1597 error_propagate(errp, local_err);
1598 } else {
1599 error_setg(errp, "the helper program 'systemctl %s' returned an "
1600 "unexpected exit status code (%d)",
1601 systemctl_args[mode], status);
1602 }
1603 }
1604
1605 static bool pmutils_supports_mode(SuspendMode mode, Error **errp)
1606 {
1607 Error *local_err = NULL;
1608 const char *pmutils_args[3] = {"--hibernate", "--suspend",
1609 "--suspend-hybrid"};
1610 const char *cmd[3] = {"pm-is-supported", pmutils_args[mode], NULL};
1611 int status;
1612
1613 status = run_process_child(cmd, &local_err);
1614
1615 if (status == SUSPEND_SUPPORTED) {
1616 return true;
1617 }
1618
1619 if ((status == -1) && !local_err) {
1620 return false;
1621 }
1622
1623 if (local_err) {
1624 error_propagate(errp, local_err);
1625 } else {
1626 error_setg(errp,
1627 "the helper program '%s' returned an unexpected exit"
1628 " status code (%d)", "pm-is-supported", status);
1629 }
1630
1631 return false;
1632 }
1633
1634 static void pmutils_suspend(SuspendMode mode, Error **errp)
1635 {
1636 Error *local_err = NULL;
1637 const char *pmutils_binaries[3] = {"pm-hibernate", "pm-suspend",
1638 "pm-suspend-hybrid"};
1639 const char *cmd[2] = {pmutils_binaries[mode], NULL};
1640 int status;
1641
1642 status = run_process_child(cmd, &local_err);
1643
1644 if (status == 0) {
1645 return;
1646 }
1647
1648 if ((status == -1) && !local_err) {
1649 error_setg(errp, "the helper program '%s' was not found",
1650 pmutils_binaries[mode]);
1651 return;
1652 }
1653
1654 if (local_err) {
1655 error_propagate(errp, local_err);
1656 } else {
1657 error_setg(errp,
1658 "the helper program '%s' returned an unexpected exit"
1659 " status code (%d)", pmutils_binaries[mode], status);
1660 }
1661 }
1662
1663 static bool linux_sys_state_supports_mode(SuspendMode mode, Error **errp)
1664 {
1665 const char *sysfile_strs[3] = {"disk", "mem", NULL};
1666 const char *sysfile_str = sysfile_strs[mode];
1667 char buf[32]; /* hopefully big enough */
1668 int fd;
1669 ssize_t ret;
1670
1671 if (!sysfile_str) {
1672 error_setg(errp, "unknown guest suspend mode");
1673 return false;
1674 }
1675
1676 fd = open(LINUX_SYS_STATE_FILE, O_RDONLY);
1677 if (fd < 0) {
1678 return false;
1679 }
1680
1681 ret = read(fd, buf, sizeof(buf) - 1);
1682 close(fd);
1683 if (ret <= 0) {
1684 return false;
1685 }
1686 buf[ret] = '\0';
1687
1688 if (strstr(buf, sysfile_str)) {
1689 return true;
1690 }
1691 return false;
1692 }
1693
1694 static void linux_sys_state_suspend(SuspendMode mode, Error **errp)
1695 {
1696 Error *local_err = NULL;
1697 const char *sysfile_strs[3] = {"disk", "mem", NULL};
1698 const char *sysfile_str = sysfile_strs[mode];
1699 pid_t pid;
1700 int status;
1701
1702 if (!sysfile_str) {
1703 error_setg(errp, "unknown guest suspend mode");
1704 return;
1705 }
1706
1707 pid = fork();
1708 if (!pid) {
1709 /* child */
1710 int fd;
1711
1712 setsid();
1713 reopen_fd_to_null(0);
1714 reopen_fd_to_null(1);
1715 reopen_fd_to_null(2);
1716
1717 fd = open(LINUX_SYS_STATE_FILE, O_WRONLY);
1718 if (fd < 0) {
1719 _exit(EXIT_FAILURE);
1720 }
1721
1722 if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) {
1723 _exit(EXIT_FAILURE);
1724 }
1725
1726 _exit(EXIT_SUCCESS);
1727 } else if (pid < 0) {
1728 error_setg_errno(errp, errno, "failed to create child process");
1729 return;
1730 }
1731
1732 ga_wait_child(pid, &status, &local_err);
1733 if (local_err) {
1734 error_propagate(errp, local_err);
1735 return;
1736 }
1737
1738 if (WEXITSTATUS(status)) {
1739 error_setg(errp, "child process has failed to suspend");
1740 }
1741
1742 }
1743
1744 static void guest_suspend(SuspendMode mode, Error **errp)
1745 {
1746 Error *local_err = NULL;
1747 bool mode_supported = false;
1748
1749 if (systemd_supports_mode(mode, &local_err)) {
1750 mode_supported = true;
1751 systemd_suspend(mode, &local_err);
1752 }
1753
1754 if (!local_err) {
1755 return;
1756 }
1757
1758 error_free(local_err);
1759 local_err = NULL;
1760
1761 if (pmutils_supports_mode(mode, &local_err)) {
1762 mode_supported = true;
1763 pmutils_suspend(mode, &local_err);
1764 }
1765
1766 if (!local_err) {
1767 return;
1768 }
1769
1770 error_free(local_err);
1771 local_err = NULL;
1772
1773 if (linux_sys_state_supports_mode(mode, &local_err)) {
1774 mode_supported = true;
1775 linux_sys_state_suspend(mode, &local_err);
1776 }
1777
1778 if (!mode_supported) {
1779 error_free(local_err);
1780 error_setg(errp,
1781 "the requested suspend mode is not supported by the guest");
1782 } else {
1783 error_propagate(errp, local_err);
1784 }
1785 }
1786
1787 void qmp_guest_suspend_disk(Error **errp)
1788 {
1789 guest_suspend(SUSPEND_MODE_DISK, errp);
1790 }
1791
1792 void qmp_guest_suspend_ram(Error **errp)
1793 {
1794 guest_suspend(SUSPEND_MODE_RAM, errp);
1795 }
1796
1797 void qmp_guest_suspend_hybrid(Error **errp)
1798 {
1799 guest_suspend(SUSPEND_MODE_HYBRID, errp);
1800 }
1801
1802 static GuestNetworkInterfaceList *
1803 guest_find_interface(GuestNetworkInterfaceList *head,
1804 const char *name)
1805 {
1806 for (; head; head = head->next) {
1807 if (strcmp(head->value->name, name) == 0) {
1808 break;
1809 }
1810 }
1811
1812 return head;
1813 }
1814
1815 static int guest_get_network_stats(const char *name,
1816 GuestNetworkInterfaceStat *stats)
1817 {
1818 int name_len;
1819 char const *devinfo = "/proc/net/dev";
1820 FILE *fp;
1821 char *line = NULL, *colon;
1822 size_t n = 0;
1823 fp = fopen(devinfo, "r");
1824 if (!fp) {
1825 return -1;
1826 }
1827 name_len = strlen(name);
1828 while (getline(&line, &n, fp) != -1) {
1829 long long dummy;
1830 long long rx_bytes;
1831 long long rx_packets;
1832 long long rx_errs;
1833 long long rx_dropped;
1834 long long tx_bytes;
1835 long long tx_packets;
1836 long long tx_errs;
1837 long long tx_dropped;
1838 char *trim_line;
1839 trim_line = g_strchug(line);
1840 if (trim_line[0] == '\0') {
1841 continue;
1842 }
1843 colon = strchr(trim_line, ':');
1844 if (!colon) {
1845 continue;
1846 }
1847 if (colon - name_len == trim_line &&
1848 strncmp(trim_line, name, name_len) == 0) {
1849 if (sscanf(colon + 1,
1850 "%lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld",
1851 &rx_bytes, &rx_packets, &rx_errs, &rx_dropped,
1852 &dummy, &dummy, &dummy, &dummy,
1853 &tx_bytes, &tx_packets, &tx_errs, &tx_dropped,
1854 &dummy, &dummy, &dummy, &dummy) != 16) {
1855 continue;
1856 }
1857 stats->rx_bytes = rx_bytes;
1858 stats->rx_packets = rx_packets;
1859 stats->rx_errs = rx_errs;
1860 stats->rx_dropped = rx_dropped;
1861 stats->tx_bytes = tx_bytes;
1862 stats->tx_packets = tx_packets;
1863 stats->tx_errs = tx_errs;
1864 stats->tx_dropped = tx_dropped;
1865 fclose(fp);
1866 g_free(line);
1867 return 0;
1868 }
1869 }
1870 fclose(fp);
1871 g_free(line);
1872 g_debug("/proc/net/dev: Interface '%s' not found", name);
1873 return -1;
1874 }
1875
1876 /*
1877 * Build information about guest interfaces
1878 */
1879 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
1880 {
1881 GuestNetworkInterfaceList *head = NULL, *cur_item = NULL;
1882 struct ifaddrs *ifap, *ifa;
1883
1884 if (getifaddrs(&ifap) < 0) {
1885 error_setg_errno(errp, errno, "getifaddrs failed");
1886 goto error;
1887 }
1888
1889 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1890 GuestNetworkInterfaceList *info;
1891 GuestIpAddressList **address_list = NULL, *address_item = NULL;
1892 GuestNetworkInterfaceStat *interface_stat = NULL;
1893 char addr4[INET_ADDRSTRLEN];
1894 char addr6[INET6_ADDRSTRLEN];
1895 int sock;
1896 struct ifreq ifr;
1897 unsigned char *mac_addr;
1898 void *p;
1899
1900 g_debug("Processing %s interface", ifa->ifa_name);
1901
1902 info = guest_find_interface(head, ifa->ifa_name);
1903
1904 if (!info) {
1905 info = g_malloc0(sizeof(*info));
1906 info->value = g_malloc0(sizeof(*info->value));
1907 info->value->name = g_strdup(ifa->ifa_name);
1908
1909 if (!cur_item) {
1910 head = cur_item = info;
1911 } else {
1912 cur_item->next = info;
1913 cur_item = info;
1914 }
1915 }
1916
1917 if (!info->value->has_hardware_address &&
1918 ifa->ifa_flags & SIOCGIFHWADDR) {
1919 /* we haven't obtained HW address yet */
1920 sock = socket(PF_INET, SOCK_STREAM, 0);
1921 if (sock == -1) {
1922 error_setg_errno(errp, errno, "failed to create socket");
1923 goto error;
1924 }
1925
1926 memset(&ifr, 0, sizeof(ifr));
1927 pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->value->name);
1928 if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) {
1929 error_setg_errno(errp, errno,
1930 "failed to get MAC address of %s",
1931 ifa->ifa_name);
1932 close(sock);
1933 goto error;
1934 }
1935
1936 close(sock);
1937 mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data;
1938
1939 info->value->hardware_address =
1940 g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x",
1941 (int) mac_addr[0], (int) mac_addr[1],
1942 (int) mac_addr[2], (int) mac_addr[3],
1943 (int) mac_addr[4], (int) mac_addr[5]);
1944
1945 info->value->has_hardware_address = true;
1946 }
1947
1948 if (ifa->ifa_addr &&
1949 ifa->ifa_addr->sa_family == AF_INET) {
1950 /* interface with IPv4 address */
1951 p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
1952 if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) {
1953 error_setg_errno(errp, errno, "inet_ntop failed");
1954 goto error;
1955 }
1956
1957 address_item = g_malloc0(sizeof(*address_item));
1958 address_item->value = g_malloc0(sizeof(*address_item->value));
1959 address_item->value->ip_address = g_strdup(addr4);
1960 address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4;
1961
1962 if (ifa->ifa_netmask) {
1963 /* Count the number of set bits in netmask.
1964 * This is safe as '1' and '0' cannot be shuffled in netmask. */
1965 p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr;
1966 address_item->value->prefix = ctpop32(((uint32_t *) p)[0]);
1967 }
1968 } else if (ifa->ifa_addr &&
1969 ifa->ifa_addr->sa_family == AF_INET6) {
1970 /* interface with IPv6 address */
1971 p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
1972 if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) {
1973 error_setg_errno(errp, errno, "inet_ntop failed");
1974 goto error;
1975 }
1976
1977 address_item = g_malloc0(sizeof(*address_item));
1978 address_item->value = g_malloc0(sizeof(*address_item->value));
1979 address_item->value->ip_address = g_strdup(addr6);
1980 address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6;
1981
1982 if (ifa->ifa_netmask) {
1983 /* Count the number of set bits in netmask.
1984 * This is safe as '1' and '0' cannot be shuffled in netmask. */
1985 p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr;
1986 address_item->value->prefix =
1987 ctpop32(((uint32_t *) p)[0]) +
1988 ctpop32(((uint32_t *) p)[1]) +
1989 ctpop32(((uint32_t *) p)[2]) +
1990 ctpop32(((uint32_t *) p)[3]);
1991 }
1992 }
1993
1994 if (!address_item) {
1995 continue;
1996 }
1997
1998 address_list = &info->value->ip_addresses;
1999
2000 while (*address_list && (*address_list)->next) {
2001 address_list = &(*address_list)->next;
2002 }
2003
2004 if (!*address_list) {
2005 *address_list = address_item;
2006 } else {
2007 (*address_list)->next = address_item;
2008 }
2009
2010 info->value->has_ip_addresses = true;
2011
2012 if (!info->value->has_statistics) {
2013 interface_stat = g_malloc0(sizeof(*interface_stat));
2014 if (guest_get_network_stats(info->value->name,
2015 interface_stat) == -1) {
2016 info->value->has_statistics = false;
2017 g_free(interface_stat);
2018 } else {
2019 info->value->statistics = interface_stat;
2020 info->value->has_statistics = true;
2021 }
2022 }
2023 }
2024
2025 freeifaddrs(ifap);
2026 return head;
2027
2028 error:
2029 freeifaddrs(ifap);
2030 qapi_free_GuestNetworkInterfaceList(head);
2031 return NULL;
2032 }
2033
2034 #define SYSCONF_EXACT(name, errp) sysconf_exact((name), #name, (errp))
2035
2036 static long sysconf_exact(int name, const char *name_str, Error **errp)
2037 {
2038 long ret;
2039
2040 errno = 0;
2041 ret = sysconf(name);
2042 if (ret == -1) {
2043 if (errno == 0) {
2044 error_setg(errp, "sysconf(%s): value indefinite", name_str);
2045 } else {
2046 error_setg_errno(errp, errno, "sysconf(%s)", name_str);
2047 }
2048 }
2049 return ret;
2050 }
2051
2052 /* Transfer online/offline status between @vcpu and the guest system.
2053 *
2054 * On input either @errp or *@errp must be NULL.
2055 *
2056 * In system-to-@vcpu direction, the following @vcpu fields are accessed:
2057 * - R: vcpu->logical_id
2058 * - W: vcpu->online
2059 * - W: vcpu->can_offline
2060 *
2061 * In @vcpu-to-system direction, the following @vcpu fields are accessed:
2062 * - R: vcpu->logical_id
2063 * - R: vcpu->online
2064 *
2065 * Written members remain unmodified on error.
2066 */
2067 static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu,
2068 char *dirpath, Error **errp)
2069 {
2070 int fd;
2071 int res;
2072 int dirfd;
2073 static const char fn[] = "online";
2074
2075 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2076 if (dirfd == -1) {
2077 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2078 return;
2079 }
2080
2081 fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR);
2082 if (fd == -1) {
2083 if (errno != ENOENT) {
2084 error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn);
2085 } else if (sys2vcpu) {
2086 vcpu->online = true;
2087 vcpu->can_offline = false;
2088 } else if (!vcpu->online) {
2089 error_setg(errp, "logical processor #%" PRId64 " can't be "
2090 "offlined", vcpu->logical_id);
2091 } /* otherwise pretend successful re-onlining */
2092 } else {
2093 unsigned char status;
2094
2095 res = pread(fd, &status, 1, 0);
2096 if (res == -1) {
2097 error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn);
2098 } else if (res == 0) {
2099 error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath,
2100 fn);
2101 } else if (sys2vcpu) {
2102 vcpu->online = (status != '0');
2103 vcpu->can_offline = true;
2104 } else if (vcpu->online != (status != '0')) {
2105 status = '0' + vcpu->online;
2106 if (pwrite(fd, &status, 1, 0) == -1) {
2107 error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath,
2108 fn);
2109 }
2110 } /* otherwise pretend successful re-(on|off)-lining */
2111
2112 res = close(fd);
2113 g_assert(res == 0);
2114 }
2115
2116 res = close(dirfd);
2117 g_assert(res == 0);
2118 }
2119
2120 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
2121 {
2122 int64_t current;
2123 GuestLogicalProcessorList *head, **link;
2124 long sc_max;
2125 Error *local_err = NULL;
2126
2127 current = 0;
2128 head = NULL;
2129 link = &head;
2130 sc_max = SYSCONF_EXACT(_SC_NPROCESSORS_CONF, &local_err);
2131
2132 while (local_err == NULL && current < sc_max) {
2133 GuestLogicalProcessor *vcpu;
2134 GuestLogicalProcessorList *entry;
2135 int64_t id = current++;
2136 char *path = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/",
2137 id);
2138
2139 if (g_file_test(path, G_FILE_TEST_EXISTS)) {
2140 vcpu = g_malloc0(sizeof *vcpu);
2141 vcpu->logical_id = id;
2142 vcpu->has_can_offline = true; /* lolspeak ftw */
2143 transfer_vcpu(vcpu, true, path, &local_err);
2144 entry = g_malloc0(sizeof *entry);
2145 entry->value = vcpu;
2146 *link = entry;
2147 link = &entry->next;
2148 }
2149 g_free(path);
2150 }
2151
2152 if (local_err == NULL) {
2153 /* there's no guest with zero VCPUs */
2154 g_assert(head != NULL);
2155 return head;
2156 }
2157
2158 qapi_free_GuestLogicalProcessorList(head);
2159 error_propagate(errp, local_err);
2160 return NULL;
2161 }
2162
2163 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
2164 {
2165 int64_t processed;
2166 Error *local_err = NULL;
2167
2168 processed = 0;
2169 while (vcpus != NULL) {
2170 char *path = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/",
2171 vcpus->value->logical_id);
2172
2173 transfer_vcpu(vcpus->value, false, path, &local_err);
2174 g_free(path);
2175 if (local_err != NULL) {
2176 break;
2177 }
2178 ++processed;
2179 vcpus = vcpus->next;
2180 }
2181
2182 if (local_err != NULL) {
2183 if (processed == 0) {
2184 error_propagate(errp, local_err);
2185 } else {
2186 error_free(local_err);
2187 }
2188 }
2189
2190 return processed;
2191 }
2192
2193 void qmp_guest_set_user_password(const char *username,
2194 const char *password,
2195 bool crypted,
2196 Error **errp)
2197 {
2198 Error *local_err = NULL;
2199 char *passwd_path = NULL;
2200 pid_t pid;
2201 int status;
2202 int datafd[2] = { -1, -1 };
2203 char *rawpasswddata = NULL;
2204 size_t rawpasswdlen;
2205 char *chpasswddata = NULL;
2206 size_t chpasswdlen;
2207
2208 rawpasswddata = (char *)qbase64_decode(password, -1, &rawpasswdlen, errp);
2209 if (!rawpasswddata) {
2210 return;
2211 }
2212 rawpasswddata = g_renew(char, rawpasswddata, rawpasswdlen + 1);
2213 rawpasswddata[rawpasswdlen] = '\0';
2214
2215 if (strchr(rawpasswddata, '\n')) {
2216 error_setg(errp, "forbidden characters in raw password");
2217 goto out;
2218 }
2219
2220 if (strchr(username, '\n') ||
2221 strchr(username, ':')) {
2222 error_setg(errp, "forbidden characters in username");
2223 goto out;
2224 }
2225
2226 chpasswddata = g_strdup_printf("%s:%s\n", username, rawpasswddata);
2227 chpasswdlen = strlen(chpasswddata);
2228
2229 passwd_path = g_find_program_in_path("chpasswd");
2230
2231 if (!passwd_path) {
2232 error_setg(errp, "cannot find 'passwd' program in PATH");
2233 goto out;
2234 }
2235
2236 if (pipe(datafd) < 0) {
2237 error_setg(errp, "cannot create pipe FDs");
2238 goto out;
2239 }
2240
2241 pid = fork();
2242 if (pid == 0) {
2243 close(datafd[1]);
2244 /* child */
2245 setsid();
2246 dup2(datafd[0], 0);
2247 reopen_fd_to_null(1);
2248 reopen_fd_to_null(2);
2249
2250 if (crypted) {
2251 execle(passwd_path, "chpasswd", "-e", NULL, environ);
2252 } else {
2253 execle(passwd_path, "chpasswd", NULL, environ);
2254 }
2255 _exit(EXIT_FAILURE);
2256 } else if (pid < 0) {
2257 error_setg_errno(errp, errno, "failed to create child process");
2258 goto out;
2259 }
2260 close(datafd[0]);
2261 datafd[0] = -1;
2262
2263 if (qemu_write_full(datafd[1], chpasswddata, chpasswdlen) != chpasswdlen) {
2264 error_setg_errno(errp, errno, "cannot write new account password");
2265 goto out;
2266 }
2267 close(datafd[1]);
2268 datafd[1] = -1;
2269
2270 ga_wait_child(pid, &status, &local_err);
2271 if (local_err) {
2272 error_propagate(errp, local_err);
2273 goto out;
2274 }
2275
2276 if (!WIFEXITED(status)) {
2277 error_setg(errp, "child process has terminated abnormally");
2278 goto out;
2279 }
2280
2281 if (WEXITSTATUS(status)) {
2282 error_setg(errp, "child process has failed to set user password");
2283 goto out;
2284 }
2285
2286 out:
2287 g_free(chpasswddata);
2288 g_free(rawpasswddata);
2289 g_free(passwd_path);
2290 if (datafd[0] != -1) {
2291 close(datafd[0]);
2292 }
2293 if (datafd[1] != -1) {
2294 close(datafd[1]);
2295 }
2296 }
2297
2298 static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf,
2299 int size, Error **errp)
2300 {
2301 int fd;
2302 int res;
2303
2304 errno = 0;
2305 fd = openat(dirfd, pathname, O_RDONLY);
2306 if (fd == -1) {
2307 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname);
2308 return;
2309 }
2310
2311 res = pread(fd, buf, size, 0);
2312 if (res == -1) {
2313 error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname);
2314 } else if (res == 0) {
2315 error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname);
2316 }
2317 close(fd);
2318 }
2319
2320 static void ga_write_sysfs_file(int dirfd, const char *pathname,
2321 const char *buf, int size, Error **errp)
2322 {
2323 int fd;
2324
2325 errno = 0;
2326 fd = openat(dirfd, pathname, O_WRONLY);
2327 if (fd == -1) {
2328 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname);
2329 return;
2330 }
2331
2332 if (pwrite(fd, buf, size, 0) == -1) {
2333 error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname);
2334 }
2335
2336 close(fd);
2337 }
2338
2339 /* Transfer online/offline status between @mem_blk and the guest system.
2340 *
2341 * On input either @errp or *@errp must be NULL.
2342 *
2343 * In system-to-@mem_blk direction, the following @mem_blk fields are accessed:
2344 * - R: mem_blk->phys_index
2345 * - W: mem_blk->online
2346 * - W: mem_blk->can_offline
2347 *
2348 * In @mem_blk-to-system direction, the following @mem_blk fields are accessed:
2349 * - R: mem_blk->phys_index
2350 * - R: mem_blk->online
2351 *- R: mem_blk->can_offline
2352 * Written members remain unmodified on error.
2353 */
2354 static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk,
2355 GuestMemoryBlockResponse *result,
2356 Error **errp)
2357 {
2358 char *dirpath;
2359 int dirfd;
2360 char *status;
2361 Error *local_err = NULL;
2362
2363 if (!sys2memblk) {
2364 DIR *dp;
2365
2366 if (!result) {
2367 error_setg(errp, "Internal error, 'result' should not be NULL");
2368 return;
2369 }
2370 errno = 0;
2371 dp = opendir("/sys/devices/system/memory/");
2372 /* if there is no 'memory' directory in sysfs,
2373 * we think this VM does not support online/offline memory block,
2374 * any other solution?
2375 */
2376 if (!dp) {
2377 if (errno == ENOENT) {
2378 result->response =
2379 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED;
2380 }
2381 goto out1;
2382 }
2383 closedir(dp);
2384 }
2385
2386 dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/",
2387 mem_blk->phys_index);
2388 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2389 if (dirfd == -1) {
2390 if (sys2memblk) {
2391 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2392 } else {
2393 if (errno == ENOENT) {
2394 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND;
2395 } else {
2396 result->response =
2397 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2398 }
2399 }
2400 g_free(dirpath);
2401 goto out1;
2402 }
2403 g_free(dirpath);
2404
2405 status = g_malloc0(10);
2406 ga_read_sysfs_file(dirfd, "state", status, 10, &local_err);
2407 if (local_err) {
2408 /* treat with sysfs file that not exist in old kernel */
2409 if (errno == ENOENT) {
2410 error_free(local_err);
2411 if (sys2memblk) {
2412 mem_blk->online = true;
2413 mem_blk->can_offline = false;
2414 } else if (!mem_blk->online) {
2415 result->response =
2416 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED;
2417 }
2418 } else {
2419 if (sys2memblk) {
2420 error_propagate(errp, local_err);
2421 } else {
2422 error_free(local_err);
2423 result->response =
2424 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2425 }
2426 }
2427 goto out2;
2428 }
2429
2430 if (sys2memblk) {
2431 char removable = '0';
2432
2433 mem_blk->online = (strncmp(status, "online", 6) == 0);
2434
2435 ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err);
2436 if (local_err) {
2437 /* if no 'removable' file, it doesn't support offline mem blk */
2438 if (errno == ENOENT) {
2439 error_free(local_err);
2440 mem_blk->can_offline = false;
2441 } else {
2442 error_propagate(errp, local_err);
2443 }
2444 } else {
2445 mem_blk->can_offline = (removable != '0');
2446 }
2447 } else {
2448 if (mem_blk->online != (strncmp(status, "online", 6) == 0)) {
2449 const char *new_state = mem_blk->online ? "online" : "offline";
2450
2451 ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state),
2452 &local_err);
2453 if (local_err) {
2454 error_free(local_err);
2455 result->response =
2456 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2457 goto out2;
2458 }
2459
2460 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS;
2461 result->has_error_code = false;
2462 } /* otherwise pretend successful re-(on|off)-lining */
2463 }
2464 g_free(status);
2465 close(dirfd);
2466 return;
2467
2468 out2:
2469 g_free(status);
2470 close(dirfd);
2471 out1:
2472 if (!sys2memblk) {
2473 result->has_error_code = true;
2474 result->error_code = errno;
2475 }
2476 }
2477
2478 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp)
2479 {
2480 GuestMemoryBlockList *head, **link;
2481 Error *local_err = NULL;
2482 struct dirent *de;
2483 DIR *dp;
2484
2485 head = NULL;
2486 link = &head;
2487
2488 dp = opendir("/sys/devices/system/memory/");
2489 if (!dp) {
2490 /* it's ok if this happens to be a system that doesn't expose
2491 * memory blocks via sysfs, but otherwise we should report
2492 * an error
2493 */
2494 if (errno != ENOENT) {
2495 error_setg_errno(errp, errno, "Can't open directory"
2496 "\"/sys/devices/system/memory/\"");
2497 }
2498 return NULL;
2499 }
2500
2501 /* Note: the phys_index of memory block may be discontinuous,
2502 * this is because a memblk is the unit of the Sparse Memory design, which
2503 * allows discontinuous memory ranges (ex. NUMA), so here we should
2504 * traverse the memory block directory.
2505 */
2506 while ((de = readdir(dp)) != NULL) {
2507 GuestMemoryBlock *mem_blk;
2508 GuestMemoryBlockList *entry;
2509
2510 if ((strncmp(de->d_name, "memory", 6) != 0) ||
2511 !(de->d_type & DT_DIR)) {
2512 continue;
2513 }
2514
2515 mem_blk = g_malloc0(sizeof *mem_blk);
2516 /* The d_name is "memoryXXX", phys_index is block id, same as XXX */
2517 mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10);
2518 mem_blk->has_can_offline = true; /* lolspeak ftw */
2519 transfer_memory_block(mem_blk, true, NULL, &local_err);
2520 if (local_err) {
2521 break;
2522 }
2523
2524 entry = g_malloc0(sizeof *entry);
2525 entry->value = mem_blk;
2526
2527 *link = entry;
2528 link = &entry->next;
2529 }
2530
2531 closedir(dp);
2532 if (local_err == NULL) {
2533 /* there's no guest with zero memory blocks */
2534 if (head == NULL) {
2535 error_setg(errp, "guest reported zero memory blocks!");
2536 }
2537 return head;
2538 }
2539
2540 qapi_free_GuestMemoryBlockList(head);
2541 error_propagate(errp, local_err);
2542 return NULL;
2543 }
2544
2545 GuestMemoryBlockResponseList *
2546 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp)
2547 {
2548 GuestMemoryBlockResponseList *head, **link;
2549 Error *local_err = NULL;
2550
2551 head = NULL;
2552 link = &head;
2553
2554 while (mem_blks != NULL) {
2555 GuestMemoryBlockResponse *result;
2556 GuestMemoryBlockResponseList *entry;
2557 GuestMemoryBlock *current_mem_blk = mem_blks->value;
2558
2559 result = g_malloc0(sizeof(*result));
2560 result->phys_index = current_mem_blk->phys_index;
2561 transfer_memory_block(current_mem_blk, false, result, &local_err);
2562 if (local_err) { /* should never happen */
2563 goto err;
2564 }
2565 entry = g_malloc0(sizeof *entry);
2566 entry->value = result;
2567
2568 *link = entry;
2569 link = &entry->next;
2570 mem_blks = mem_blks->next;
2571 }
2572
2573 return head;
2574 err:
2575 qapi_free_GuestMemoryBlockResponseList(head);
2576 error_propagate(errp, local_err);
2577 return NULL;
2578 }
2579
2580 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp)
2581 {
2582 Error *local_err = NULL;
2583 char *dirpath;
2584 int dirfd;
2585 char *buf;
2586 GuestMemoryBlockInfo *info;
2587
2588 dirpath = g_strdup_printf("/sys/devices/system/memory/");
2589 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2590 if (dirfd == -1) {
2591 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2592 g_free(dirpath);
2593 return NULL;
2594 }
2595 g_free(dirpath);
2596
2597 buf = g_malloc0(20);
2598 ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err);
2599 close(dirfd);
2600 if (local_err) {
2601 g_free(buf);
2602 error_propagate(errp, local_err);
2603 return NULL;
2604 }
2605
2606 info = g_new0(GuestMemoryBlockInfo, 1);
2607 info->size = strtol(buf, NULL, 16); /* the unit is bytes */
2608
2609 g_free(buf);
2610
2611 return info;
2612 }
2613
2614 #else /* defined(__linux__) */
2615
2616 void qmp_guest_suspend_disk(Error **errp)
2617 {
2618 error_setg(errp, QERR_UNSUPPORTED);
2619 }
2620
2621 void qmp_guest_suspend_ram(Error **errp)
2622 {
2623 error_setg(errp, QERR_UNSUPPORTED);
2624 }
2625
2626 void qmp_guest_suspend_hybrid(Error **errp)
2627 {
2628 error_setg(errp, QERR_UNSUPPORTED);
2629 }
2630
2631 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
2632 {
2633 error_setg(errp, QERR_UNSUPPORTED);
2634 return NULL;
2635 }
2636
2637 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
2638 {
2639 error_setg(errp, QERR_UNSUPPORTED);
2640 return NULL;
2641 }
2642
2643 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
2644 {
2645 error_setg(errp, QERR_UNSUPPORTED);
2646 return -1;
2647 }
2648
2649 void qmp_guest_set_user_password(const char *username,
2650 const char *password,
2651 bool crypted,
2652 Error **errp)
2653 {
2654 error_setg(errp, QERR_UNSUPPORTED);
2655 }
2656
2657 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp)
2658 {
2659 error_setg(errp, QERR_UNSUPPORTED);
2660 return NULL;
2661 }
2662
2663 GuestMemoryBlockResponseList *
2664 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp)
2665 {
2666 error_setg(errp, QERR_UNSUPPORTED);
2667 return NULL;
2668 }
2669
2670 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp)
2671 {
2672 error_setg(errp, QERR_UNSUPPORTED);
2673 return NULL;
2674 }
2675
2676 #endif
2677
2678 #if !defined(CONFIG_FSFREEZE)
2679
2680 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
2681 {
2682 error_setg(errp, QERR_UNSUPPORTED);
2683 return NULL;
2684 }
2685
2686 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
2687 {
2688 error_setg(errp, QERR_UNSUPPORTED);
2689
2690 return 0;
2691 }
2692
2693 int64_t qmp_guest_fsfreeze_freeze(Error **errp)
2694 {
2695 error_setg(errp, QERR_UNSUPPORTED);
2696
2697 return 0;
2698 }
2699
2700 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
2701 strList *mountpoints,
2702 Error **errp)
2703 {
2704 error_setg(errp, QERR_UNSUPPORTED);
2705
2706 return 0;
2707 }
2708
2709 int64_t qmp_guest_fsfreeze_thaw(Error **errp)
2710 {
2711 error_setg(errp, QERR_UNSUPPORTED);
2712
2713 return 0;
2714 }
2715 #endif /* CONFIG_FSFREEZE */
2716
2717 #if !defined(CONFIG_FSTRIM)
2718 GuestFilesystemTrimResponse *
2719 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
2720 {
2721 error_setg(errp, QERR_UNSUPPORTED);
2722 return NULL;
2723 }
2724 #endif
2725
2726 /* add unsupported commands to the blacklist */
2727 GList *ga_command_blacklist_init(GList *blacklist)
2728 {
2729 #if !defined(__linux__)
2730 {
2731 const char *list[] = {
2732 "guest-suspend-disk", "guest-suspend-ram",
2733 "guest-suspend-hybrid", "guest-network-get-interfaces",
2734 "guest-get-vcpus", "guest-set-vcpus",
2735 "guest-get-memory-blocks", "guest-set-memory-blocks",
2736 "guest-get-memory-block-size", "guest-get-memory-block-info",
2737 NULL};
2738 char **p = (char **)list;
2739
2740 while (*p) {
2741 blacklist = g_list_append(blacklist, g_strdup(*p++));
2742 }
2743 }
2744 #endif
2745
2746 #if !defined(CONFIG_FSFREEZE)
2747 {
2748 const char *list[] = {
2749 "guest-get-fsinfo", "guest-fsfreeze-status",
2750 "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list",
2751 "guest-fsfreeze-thaw", "guest-get-fsinfo", NULL};
2752 char **p = (char **)list;
2753
2754 while (*p) {
2755 blacklist = g_list_append(blacklist, g_strdup(*p++));
2756 }
2757 }
2758 #endif
2759
2760 #if !defined(CONFIG_FSTRIM)
2761 blacklist = g_list_append(blacklist, g_strdup("guest-fstrim"));
2762 #endif
2763
2764 return blacklist;
2765 }
2766
2767 /* register init/cleanup routines for stateful command groups */
2768 void ga_command_state_init(GAState *s, GACommandState *cs)
2769 {
2770 #if defined(CONFIG_FSFREEZE)
2771 ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup);
2772 #endif
2773 }
2774
2775 #ifdef HAVE_UTMPX
2776
2777 #define QGA_MICRO_SECOND_TO_SECOND 1000000
2778
2779 static double ga_get_login_time(struct utmpx *user_info)
2780 {
2781 double seconds = (double)user_info->ut_tv.tv_sec;
2782 double useconds = (double)user_info->ut_tv.tv_usec;
2783 useconds /= QGA_MICRO_SECOND_TO_SECOND;
2784 return seconds + useconds;
2785 }
2786
2787 GuestUserList *qmp_guest_get_users(Error **errp)
2788 {
2789 GHashTable *cache = NULL;
2790 GuestUserList *head = NULL, *cur_item = NULL;
2791 struct utmpx *user_info = NULL;
2792 gpointer value = NULL;
2793 GuestUser *user = NULL;
2794 GuestUserList *item = NULL;
2795 double login_time = 0;
2796
2797 cache = g_hash_table_new(g_str_hash, g_str_equal);
2798 setutxent();
2799
2800 for (;;) {
2801 user_info = getutxent();
2802 if (user_info == NULL) {
2803 break;
2804 } else if (user_info->ut_type != USER_PROCESS) {
2805 continue;
2806 } else if (g_hash_table_contains(cache, user_info->ut_user)) {
2807 value = g_hash_table_lookup(cache, user_info->ut_user);
2808 user = (GuestUser *)value;
2809 login_time = ga_get_login_time(user_info);
2810 /* We're ensuring the earliest login time to be sent */
2811 if (login_time < user->login_time) {
2812 user->login_time = login_time;
2813 }
2814 continue;
2815 }
2816
2817 item = g_new0(GuestUserList, 1);
2818 item->value = g_new0(GuestUser, 1);
2819 item->value->user = g_strdup(user_info->ut_user);
2820 item->value->login_time = ga_get_login_time(user_info);
2821
2822 g_hash_table_insert(cache, item->value->user, item->value);
2823
2824 if (!cur_item) {
2825 head = cur_item = item;
2826 } else {
2827 cur_item->next = item;
2828 cur_item = item;
2829 }
2830 }
2831 endutxent();
2832 g_hash_table_destroy(cache);
2833 return head;
2834 }
2835
2836 #else
2837
2838 GuestUserList *qmp_guest_get_users(Error **errp)
2839 {
2840 error_setg(errp, QERR_UNSUPPORTED);
2841 return NULL;
2842 }
2843
2844 #endif
2845
2846 /* Replace escaped special characters with theire real values. The replacement
2847 * is done in place -- returned value is in the original string.
2848 */
2849 static void ga_osrelease_replace_special(gchar *value)
2850 {
2851 gchar *p, *p2, quote;
2852
2853 /* Trim the string at first space or semicolon if it is not enclosed in
2854 * single or double quotes. */
2855 if ((value[0] != '"') || (value[0] == '\'')) {
2856 p = strchr(value, ' ');
2857 if (p != NULL) {
2858 *p = 0;
2859 }
2860 p = strchr(value, ';');
2861 if (p != NULL) {
2862 *p = 0;
2863 }
2864 return;
2865 }
2866
2867 quote = value[0];
2868 p2 = value;
2869 p = value + 1;
2870 while (*p != 0) {
2871 if (*p == '\\') {
2872 p++;
2873 switch (*p) {
2874 case '$':
2875 case '\'':
2876 case '"':
2877 case '\\':
2878 case '`':
2879 break;
2880 default:
2881 /* Keep literal backslash followed by whatever is there */
2882 p--;
2883 break;
2884 }
2885 } else if (*p == quote) {
2886 *p2 = 0;
2887 break;
2888 }
2889 *(p2++) = *(p++);
2890 }
2891 }
2892
2893 static GKeyFile *ga_parse_osrelease(const char *fname)
2894 {
2895 gchar *content = NULL;
2896 gchar *content2 = NULL;
2897 GError *err = NULL;
2898 GKeyFile *keys = g_key_file_new();
2899 const char *group = "[os-release]\n";
2900
2901 if (!g_file_get_contents(fname, &content, NULL, &err)) {
2902 slog("failed to read '%s', error: %s", fname, err->message);
2903 goto fail;
2904 }
2905
2906 if (!g_utf8_validate(content, -1, NULL)) {
2907 slog("file is not utf-8 encoded: %s", fname);
2908 goto fail;
2909 }
2910 content2 = g_strdup_printf("%s%s", group, content);
2911
2912 if (!g_key_file_load_from_data(keys, content2, -1, G_KEY_FILE_NONE,
2913 &err)) {
2914 slog("failed to parse file '%s', error: %s", fname, err->message);
2915 goto fail;
2916 }
2917
2918 g_free(content);
2919 g_free(content2);
2920 return keys;
2921
2922 fail:
2923 g_error_free(err);
2924 g_free(content);
2925 g_free(content2);
2926 g_key_file_free(keys);
2927 return NULL;
2928 }
2929
2930 GuestOSInfo *qmp_guest_get_osinfo(Error **errp)
2931 {
2932 GuestOSInfo *info = NULL;
2933 struct utsname kinfo;
2934 GKeyFile *osrelease = NULL;
2935 const char *qga_os_release = g_getenv("QGA_OS_RELEASE");
2936
2937 info = g_new0(GuestOSInfo, 1);
2938
2939 if (uname(&kinfo) != 0) {
2940 error_setg_errno(errp, errno, "uname failed");
2941 } else {
2942 info->has_kernel_version = true;
2943 info->kernel_version = g_strdup(kinfo.version);
2944 info->has_kernel_release = true;
2945 info->kernel_release = g_strdup(kinfo.release);
2946 info->has_machine = true;
2947 info->machine = g_strdup(kinfo.machine);
2948 }
2949
2950 if (qga_os_release != NULL) {
2951 osrelease = ga_parse_osrelease(qga_os_release);
2952 } else {
2953 osrelease = ga_parse_osrelease("/etc/os-release");
2954 if (osrelease == NULL) {
2955 osrelease = ga_parse_osrelease("/usr/lib/os-release");
2956 }
2957 }
2958
2959 if (osrelease != NULL) {
2960 char *value;
2961
2962 #define GET_FIELD(field, osfield) do { \
2963 value = g_key_file_get_value(osrelease, "os-release", osfield, NULL); \
2964 if (value != NULL) { \
2965 ga_osrelease_replace_special(value); \
2966 info->has_ ## field = true; \
2967 info->field = value; \
2968 } \
2969 } while (0)
2970 GET_FIELD(id, "ID");
2971 GET_FIELD(name, "NAME");
2972 GET_FIELD(pretty_name, "PRETTY_NAME");
2973 GET_FIELD(version, "VERSION");
2974 GET_FIELD(version_id, "VERSION_ID");
2975 GET_FIELD(variant, "VARIANT");
2976 GET_FIELD(variant_id, "VARIANT_ID");
2977 #undef GET_FIELD
2978
2979 g_key_file_free(osrelease);
2980 }
2981
2982 return info;
2983 }