Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu into staging
[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 "qga-qapi-commands.h"
20 #include "qapi/error.h"
21 #include "qapi/qmp/qerror.h"
22 #include "qemu/host-utils.h"
23 #include "qemu/sockets.h"
24 #include "qemu/base64.h"
25 #include "qemu/cutils.h"
26 #include "commands-common.h"
27 #include "block/nvme.h"
28 #include "cutils.h"
29
30 #ifdef HAVE_UTMPX
31 #include <utmpx.h>
32 #endif
33
34 #if defined(__linux__)
35 #include <mntent.h>
36 #include <sys/statvfs.h>
37 #include <linux/nvme_ioctl.h>
38
39 #ifdef CONFIG_LIBUDEV
40 #include <libudev.h>
41 #endif
42 #endif
43
44 #ifdef HAVE_GETIFADDRS
45 #include <arpa/inet.h>
46 #include <sys/socket.h>
47 #include <net/if.h>
48 #if defined(__NetBSD__) || defined(__OpenBSD__)
49 #include <net/if_arp.h>
50 #include <netinet/if_ether.h>
51 #else
52 #include <net/ethernet.h>
53 #endif
54 #include <sys/types.h>
55 #ifdef CONFIG_SOLARIS
56 #include <sys/sockio.h>
57 #endif
58 #endif
59
60 static void ga_wait_child(pid_t pid, int *status, Error **errp)
61 {
62 pid_t rpid;
63
64 *status = 0;
65
66 rpid = RETRY_ON_EINTR(waitpid(pid, status, 0));
67
68 if (rpid == -1) {
69 error_setg_errno(errp, errno, "failed to wait for child (pid: %d)",
70 pid);
71 return;
72 }
73
74 g_assert(rpid == pid);
75 }
76
77 void qmp_guest_shutdown(const char *mode, Error **errp)
78 {
79 const char *shutdown_flag;
80 Error *local_err = NULL;
81 pid_t pid;
82 int status;
83
84 #ifdef CONFIG_SOLARIS
85 const char *powerdown_flag = "-i5";
86 const char *halt_flag = "-i0";
87 const char *reboot_flag = "-i6";
88 #elif defined(CONFIG_BSD)
89 const char *powerdown_flag = "-p";
90 const char *halt_flag = "-h";
91 const char *reboot_flag = "-r";
92 #else
93 const char *powerdown_flag = "-P";
94 const char *halt_flag = "-H";
95 const char *reboot_flag = "-r";
96 #endif
97
98 slog("guest-shutdown called, mode: %s", mode);
99 if (!mode || strcmp(mode, "powerdown") == 0) {
100 shutdown_flag = powerdown_flag;
101 } else if (strcmp(mode, "halt") == 0) {
102 shutdown_flag = halt_flag;
103 } else if (strcmp(mode, "reboot") == 0) {
104 shutdown_flag = reboot_flag;
105 } else {
106 error_setg(errp,
107 "mode is invalid (valid values are: halt|powerdown|reboot");
108 return;
109 }
110
111 pid = fork();
112 if (pid == 0) {
113 /* child, start the shutdown */
114 setsid();
115 reopen_fd_to_null(0);
116 reopen_fd_to_null(1);
117 reopen_fd_to_null(2);
118
119 #ifdef CONFIG_SOLARIS
120 execl("/sbin/shutdown", "shutdown", shutdown_flag, "-g0", "-y",
121 "hypervisor initiated shutdown", (char *)NULL);
122 #elif defined(CONFIG_BSD)
123 execl("/sbin/shutdown", "shutdown", shutdown_flag, "+0",
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, const char *mode,
411 Error **errp)
412 {
413 FILE *fh;
414 Error *local_err = NULL;
415 int64_t handle;
416
417 if (!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 #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM)
621 void free_fs_mount_list(FsMountList *mounts)
622 {
623 FsMount *mount, *temp;
624
625 if (!mounts) {
626 return;
627 }
628
629 QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) {
630 QTAILQ_REMOVE(mounts, mount, next);
631 g_free(mount->dirname);
632 g_free(mount->devtype);
633 g_free(mount);
634 }
635 }
636 #endif
637
638 #if defined(CONFIG_FSFREEZE)
639 typedef enum {
640 FSFREEZE_HOOK_THAW = 0,
641 FSFREEZE_HOOK_FREEZE,
642 } FsfreezeHookArg;
643
644 static const char *fsfreeze_hook_arg_string[] = {
645 "thaw",
646 "freeze",
647 };
648
649 static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **errp)
650 {
651 int status;
652 pid_t pid;
653 const char *hook;
654 const char *arg_str = fsfreeze_hook_arg_string[arg];
655 Error *local_err = NULL;
656
657 hook = ga_fsfreeze_hook(ga_state);
658 if (!hook) {
659 return;
660 }
661 if (access(hook, X_OK) != 0) {
662 error_setg_errno(errp, errno, "can't access fsfreeze hook '%s'", hook);
663 return;
664 }
665
666 slog("executing fsfreeze hook with arg '%s'", arg_str);
667 pid = fork();
668 if (pid == 0) {
669 setsid();
670 reopen_fd_to_null(0);
671 reopen_fd_to_null(1);
672 reopen_fd_to_null(2);
673
674 execl(hook, hook, arg_str, NULL);
675 _exit(EXIT_FAILURE);
676 } else if (pid < 0) {
677 error_setg_errno(errp, errno, "failed to create child process");
678 return;
679 }
680
681 ga_wait_child(pid, &status, &local_err);
682 if (local_err) {
683 error_propagate(errp, local_err);
684 return;
685 }
686
687 if (!WIFEXITED(status)) {
688 error_setg(errp, "fsfreeze hook has terminated abnormally");
689 return;
690 }
691
692 status = WEXITSTATUS(status);
693 if (status) {
694 error_setg(errp, "fsfreeze hook has failed with status %d", status);
695 return;
696 }
697 }
698
699 /*
700 * Return status of freeze/thaw
701 */
702 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
703 {
704 if (ga_is_frozen(ga_state)) {
705 return GUEST_FSFREEZE_STATUS_FROZEN;
706 }
707
708 return GUEST_FSFREEZE_STATUS_THAWED;
709 }
710
711 int64_t qmp_guest_fsfreeze_freeze(Error **errp)
712 {
713 return qmp_guest_fsfreeze_freeze_list(false, NULL, errp);
714 }
715
716 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
717 strList *mountpoints,
718 Error **errp)
719 {
720 int ret;
721 FsMountList mounts;
722 Error *local_err = NULL;
723
724 slog("guest-fsfreeze called");
725
726 execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err);
727 if (local_err) {
728 error_propagate(errp, local_err);
729 return -1;
730 }
731
732 QTAILQ_INIT(&mounts);
733 if (!build_fs_mount_list(&mounts, &local_err)) {
734 error_propagate(errp, local_err);
735 return -1;
736 }
737
738 /* cannot risk guest agent blocking itself on a write in this state */
739 ga_set_frozen(ga_state);
740
741 ret = qmp_guest_fsfreeze_do_freeze_list(has_mountpoints, mountpoints,
742 mounts, errp);
743
744 free_fs_mount_list(&mounts);
745 /* We may not issue any FIFREEZE here.
746 * Just unset ga_state here and ready for the next call.
747 */
748 if (ret == 0) {
749 ga_unset_frozen(ga_state);
750 } else if (ret < 0) {
751 qmp_guest_fsfreeze_thaw(NULL);
752 }
753 return ret;
754 }
755
756 int64_t qmp_guest_fsfreeze_thaw(Error **errp)
757 {
758 int ret;
759
760 ret = qmp_guest_fsfreeze_do_thaw(errp);
761 if (ret >= 0) {
762 ga_unset_frozen(ga_state);
763 execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, errp);
764 } else {
765 ret = 0;
766 }
767
768 return ret;
769 }
770
771 static void guest_fsfreeze_cleanup(void)
772 {
773 Error *err = NULL;
774
775 if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) {
776 qmp_guest_fsfreeze_thaw(&err);
777 if (err) {
778 slog("failed to clean up frozen filesystems: %s",
779 error_get_pretty(err));
780 error_free(err);
781 }
782 }
783 }
784 #endif
785
786 /* linux-specific implementations. avoid this if at all possible. */
787 #if defined(__linux__)
788 #if defined(CONFIG_FSFREEZE)
789
790 static char *get_pci_driver(char const *syspath, int pathlen, Error **errp)
791 {
792 char *path;
793 char *dpath;
794 char *driver = NULL;
795 char buf[PATH_MAX];
796 ssize_t len;
797
798 path = g_strndup(syspath, pathlen);
799 dpath = g_strdup_printf("%s/driver", path);
800 len = readlink(dpath, buf, sizeof(buf) - 1);
801 if (len != -1) {
802 buf[len] = 0;
803 driver = g_path_get_basename(buf);
804 }
805 g_free(dpath);
806 g_free(path);
807 return driver;
808 }
809
810 static int compare_uint(const void *_a, const void *_b)
811 {
812 unsigned int a = *(unsigned int *)_a;
813 unsigned int b = *(unsigned int *)_b;
814
815 return a < b ? -1 : a > b ? 1 : 0;
816 }
817
818 /* Walk the specified sysfs and build a sorted list of host or ata numbers */
819 static int build_hosts(char const *syspath, char const *host, bool ata,
820 unsigned int *hosts, int hosts_max, Error **errp)
821 {
822 char *path;
823 DIR *dir;
824 struct dirent *entry;
825 int i = 0;
826
827 path = g_strndup(syspath, host - syspath);
828 dir = opendir(path);
829 if (!dir) {
830 error_setg_errno(errp, errno, "opendir(\"%s\")", path);
831 g_free(path);
832 return -1;
833 }
834
835 while (i < hosts_max) {
836 entry = readdir(dir);
837 if (!entry) {
838 break;
839 }
840 if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) {
841 ++i;
842 } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) {
843 ++i;
844 }
845 }
846
847 qsort(hosts, i, sizeof(hosts[0]), compare_uint);
848
849 g_free(path);
850 closedir(dir);
851 return i;
852 }
853
854 /*
855 * Store disk device info for devices on the PCI bus.
856 * Returns true if information has been stored, or false for failure.
857 */
858 static bool build_guest_fsinfo_for_pci_dev(char const *syspath,
859 GuestDiskAddress *disk,
860 Error **errp)
861 {
862 unsigned int pci[4], host, hosts[8], tgt[3];
863 int i, nhosts = 0, pcilen;
864 GuestPCIAddress *pciaddr = disk->pci_controller;
865 bool has_ata = false, has_host = false, has_tgt = false;
866 char *p, *q, *driver = NULL;
867 bool ret = false;
868
869 p = strstr(syspath, "/devices/pci");
870 if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n",
871 pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) {
872 g_debug("only pci device is supported: sysfs path '%s'", syspath);
873 return false;
874 }
875
876 p += 12 + pcilen;
877 while (true) {
878 driver = get_pci_driver(syspath, p - syspath, errp);
879 if (driver && (g_str_equal(driver, "ata_piix") ||
880 g_str_equal(driver, "sym53c8xx") ||
881 g_str_equal(driver, "virtio-pci") ||
882 g_str_equal(driver, "ahci") ||
883 g_str_equal(driver, "nvme"))) {
884 break;
885 }
886
887 g_free(driver);
888 if (sscanf(p, "/%x:%x:%x.%x%n",
889 pci, pci + 1, pci + 2, pci + 3, &pcilen) == 4) {
890 p += pcilen;
891 continue;
892 }
893
894 g_debug("unsupported driver or sysfs path '%s'", syspath);
895 return false;
896 }
897
898 p = strstr(syspath, "/target");
899 if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u",
900 tgt, tgt + 1, tgt + 2) == 3) {
901 has_tgt = true;
902 }
903
904 p = strstr(syspath, "/ata");
905 if (p) {
906 q = p + 4;
907 has_ata = true;
908 } else {
909 p = strstr(syspath, "/host");
910 q = p + 5;
911 }
912 if (p && sscanf(q, "%u", &host) == 1) {
913 has_host = true;
914 nhosts = build_hosts(syspath, p, has_ata, hosts,
915 ARRAY_SIZE(hosts), errp);
916 if (nhosts < 0) {
917 goto cleanup;
918 }
919 }
920
921 pciaddr->domain = pci[0];
922 pciaddr->bus = pci[1];
923 pciaddr->slot = pci[2];
924 pciaddr->function = pci[3];
925
926 if (strcmp(driver, "ata_piix") == 0) {
927 /* a host per ide bus, target*:0:<unit>:0 */
928 if (!has_host || !has_tgt) {
929 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
930 goto cleanup;
931 }
932 for (i = 0; i < nhosts; i++) {
933 if (host == hosts[i]) {
934 disk->bus_type = GUEST_DISK_BUS_TYPE_IDE;
935 disk->bus = i;
936 disk->unit = tgt[1];
937 break;
938 }
939 }
940 if (i >= nhosts) {
941 g_debug("no host for '%s' (driver '%s')", syspath, driver);
942 goto cleanup;
943 }
944 } else if (strcmp(driver, "sym53c8xx") == 0) {
945 /* scsi(LSI Logic): target*:0:<unit>:0 */
946 if (!has_tgt) {
947 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
948 goto cleanup;
949 }
950 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
951 disk->unit = tgt[1];
952 } else if (strcmp(driver, "virtio-pci") == 0) {
953 if (has_tgt) {
954 /* virtio-scsi: target*:0:0:<unit> */
955 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
956 disk->unit = tgt[2];
957 } else {
958 /* virtio-blk: 1 disk per 1 device */
959 disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO;
960 }
961 } else if (strcmp(driver, "ahci") == 0) {
962 /* ahci: 1 host per 1 unit */
963 if (!has_host || !has_tgt) {
964 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
965 goto cleanup;
966 }
967 for (i = 0; i < nhosts; i++) {
968 if (host == hosts[i]) {
969 disk->unit = i;
970 disk->bus_type = GUEST_DISK_BUS_TYPE_SATA;
971 break;
972 }
973 }
974 if (i >= nhosts) {
975 g_debug("no host for '%s' (driver '%s')", syspath, driver);
976 goto cleanup;
977 }
978 } else if (strcmp(driver, "nvme") == 0) {
979 disk->bus_type = GUEST_DISK_BUS_TYPE_NVME;
980 } else {
981 g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath);
982 goto cleanup;
983 }
984
985 ret = true;
986
987 cleanup:
988 g_free(driver);
989 return ret;
990 }
991
992 /*
993 * Store disk device info for non-PCI virtio devices (for example s390x
994 * channel I/O devices). Returns true if information has been stored, or
995 * false for failure.
996 */
997 static bool build_guest_fsinfo_for_nonpci_virtio(char const *syspath,
998 GuestDiskAddress *disk,
999 Error **errp)
1000 {
1001 unsigned int tgt[3];
1002 char *p;
1003
1004 if (!strstr(syspath, "/virtio") || !strstr(syspath, "/block")) {
1005 g_debug("Unsupported virtio device '%s'", syspath);
1006 return false;
1007 }
1008
1009 p = strstr(syspath, "/target");
1010 if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u",
1011 &tgt[0], &tgt[1], &tgt[2]) == 3) {
1012 /* virtio-scsi: target*:0:<target>:<unit> */
1013 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
1014 disk->bus = tgt[0];
1015 disk->target = tgt[1];
1016 disk->unit = tgt[2];
1017 } else {
1018 /* virtio-blk: 1 disk per 1 device */
1019 disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO;
1020 }
1021
1022 return true;
1023 }
1024
1025 /*
1026 * Store disk device info for CCW devices (s390x channel I/O devices).
1027 * Returns true if information has been stored, or false for failure.
1028 */
1029 static bool build_guest_fsinfo_for_ccw_dev(char const *syspath,
1030 GuestDiskAddress *disk,
1031 Error **errp)
1032 {
1033 unsigned int cssid, ssid, subchno, devno;
1034 char *p;
1035
1036 p = strstr(syspath, "/devices/css");
1037 if (!p || sscanf(p + 12, "%*x/%x.%x.%x/%*x.%*x.%x/",
1038 &cssid, &ssid, &subchno, &devno) < 4) {
1039 g_debug("could not parse ccw device sysfs path: %s", syspath);
1040 return false;
1041 }
1042
1043 disk->ccw_address = g_new0(GuestCCWAddress, 1);
1044 disk->ccw_address->cssid = cssid;
1045 disk->ccw_address->ssid = ssid;
1046 disk->ccw_address->subchno = subchno;
1047 disk->ccw_address->devno = devno;
1048
1049 if (strstr(p, "/virtio")) {
1050 build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp);
1051 }
1052
1053 return true;
1054 }
1055
1056 /* Store disk device info specified by @sysfs into @fs */
1057 static void build_guest_fsinfo_for_real_device(char const *syspath,
1058 GuestFilesystemInfo *fs,
1059 Error **errp)
1060 {
1061 GuestDiskAddress *disk;
1062 GuestPCIAddress *pciaddr;
1063 bool has_hwinf;
1064 #ifdef CONFIG_LIBUDEV
1065 struct udev *udev = NULL;
1066 struct udev_device *udevice = NULL;
1067 #endif
1068
1069 pciaddr = g_new0(GuestPCIAddress, 1);
1070 pciaddr->domain = -1; /* -1 means field is invalid */
1071 pciaddr->bus = -1;
1072 pciaddr->slot = -1;
1073 pciaddr->function = -1;
1074
1075 disk = g_new0(GuestDiskAddress, 1);
1076 disk->pci_controller = pciaddr;
1077 disk->bus_type = GUEST_DISK_BUS_TYPE_UNKNOWN;
1078
1079 #ifdef CONFIG_LIBUDEV
1080 udev = udev_new();
1081 udevice = udev_device_new_from_syspath(udev, syspath);
1082 if (udev == NULL || udevice == NULL) {
1083 g_debug("failed to query udev");
1084 } else {
1085 const char *devnode, *serial;
1086 devnode = udev_device_get_devnode(udevice);
1087 if (devnode != NULL) {
1088 disk->dev = g_strdup(devnode);
1089 }
1090 serial = udev_device_get_property_value(udevice, "ID_SERIAL");
1091 if (serial != NULL && *serial != 0) {
1092 disk->serial = g_strdup(serial);
1093 }
1094 }
1095
1096 udev_unref(udev);
1097 udev_device_unref(udevice);
1098 #endif
1099
1100 if (strstr(syspath, "/devices/pci")) {
1101 has_hwinf = build_guest_fsinfo_for_pci_dev(syspath, disk, errp);
1102 } else if (strstr(syspath, "/devices/css")) {
1103 has_hwinf = build_guest_fsinfo_for_ccw_dev(syspath, disk, errp);
1104 } else if (strstr(syspath, "/virtio")) {
1105 has_hwinf = build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp);
1106 } else {
1107 g_debug("Unsupported device type for '%s'", syspath);
1108 has_hwinf = false;
1109 }
1110
1111 if (has_hwinf || disk->dev || disk->serial) {
1112 QAPI_LIST_PREPEND(fs->disk, disk);
1113 } else {
1114 qapi_free_GuestDiskAddress(disk);
1115 }
1116 }
1117
1118 static void build_guest_fsinfo_for_device(char const *devpath,
1119 GuestFilesystemInfo *fs,
1120 Error **errp);
1121
1122 /* Store a list of slave devices of virtual volume specified by @syspath into
1123 * @fs */
1124 static void build_guest_fsinfo_for_virtual_device(char const *syspath,
1125 GuestFilesystemInfo *fs,
1126 Error **errp)
1127 {
1128 Error *err = NULL;
1129 DIR *dir;
1130 char *dirpath;
1131 struct dirent *entry;
1132
1133 dirpath = g_strdup_printf("%s/slaves", syspath);
1134 dir = opendir(dirpath);
1135 if (!dir) {
1136 if (errno != ENOENT) {
1137 error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath);
1138 }
1139 g_free(dirpath);
1140 return;
1141 }
1142
1143 for (;;) {
1144 errno = 0;
1145 entry = readdir(dir);
1146 if (entry == NULL) {
1147 if (errno) {
1148 error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath);
1149 }
1150 break;
1151 }
1152
1153 if (entry->d_type == DT_LNK) {
1154 char *path;
1155
1156 g_debug(" slave device '%s'", entry->d_name);
1157 path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name);
1158 build_guest_fsinfo_for_device(path, fs, &err);
1159 g_free(path);
1160
1161 if (err) {
1162 error_propagate(errp, err);
1163 break;
1164 }
1165 }
1166 }
1167
1168 g_free(dirpath);
1169 closedir(dir);
1170 }
1171
1172 static bool is_disk_virtual(const char *devpath, Error **errp)
1173 {
1174 g_autofree char *syspath = realpath(devpath, NULL);
1175
1176 if (!syspath) {
1177 error_setg_errno(errp, errno, "realpath(\"%s\")", devpath);
1178 return false;
1179 }
1180 return strstr(syspath, "/devices/virtual/block/") != NULL;
1181 }
1182
1183 /* Dispatch to functions for virtual/real device */
1184 static void build_guest_fsinfo_for_device(char const *devpath,
1185 GuestFilesystemInfo *fs,
1186 Error **errp)
1187 {
1188 ERRP_GUARD();
1189 g_autofree char *syspath = NULL;
1190 bool is_virtual = false;
1191
1192 syspath = realpath(devpath, NULL);
1193 if (!syspath) {
1194 if (errno != ENOENT) {
1195 error_setg_errno(errp, errno, "realpath(\"%s\")", devpath);
1196 return;
1197 }
1198
1199 /* ENOENT: This devpath may not exist because of container config */
1200 if (!fs->name) {
1201 fs->name = g_path_get_basename(devpath);
1202 }
1203 return;
1204 }
1205
1206 if (!fs->name) {
1207 fs->name = g_path_get_basename(syspath);
1208 }
1209
1210 g_debug(" parse sysfs path '%s'", syspath);
1211 is_virtual = is_disk_virtual(syspath, errp);
1212 if (*errp != NULL) {
1213 return;
1214 }
1215 if (is_virtual) {
1216 build_guest_fsinfo_for_virtual_device(syspath, fs, errp);
1217 } else {
1218 build_guest_fsinfo_for_real_device(syspath, fs, errp);
1219 }
1220 }
1221
1222 #ifdef CONFIG_LIBUDEV
1223
1224 /*
1225 * Wrapper around build_guest_fsinfo_for_device() for getting just
1226 * the disk address.
1227 */
1228 static GuestDiskAddress *get_disk_address(const char *syspath, Error **errp)
1229 {
1230 g_autoptr(GuestFilesystemInfo) fs = NULL;
1231
1232 fs = g_new0(GuestFilesystemInfo, 1);
1233 build_guest_fsinfo_for_device(syspath, fs, errp);
1234 if (fs->disk != NULL) {
1235 return g_steal_pointer(&fs->disk->value);
1236 }
1237 return NULL;
1238 }
1239
1240 static char *get_alias_for_syspath(const char *syspath)
1241 {
1242 struct udev *udev = NULL;
1243 struct udev_device *udevice = NULL;
1244 char *ret = NULL;
1245
1246 udev = udev_new();
1247 if (udev == NULL) {
1248 g_debug("failed to query udev");
1249 goto out;
1250 }
1251 udevice = udev_device_new_from_syspath(udev, syspath);
1252 if (udevice == NULL) {
1253 g_debug("failed to query udev for path: %s", syspath);
1254 goto out;
1255 } else {
1256 const char *alias = udev_device_get_property_value(
1257 udevice, "DM_NAME");
1258 /*
1259 * NULL means there was an error and empty string means there is no
1260 * alias. In case of no alias we return NULL instead of empty string.
1261 */
1262 if (alias == NULL) {
1263 g_debug("failed to query udev for device alias for: %s",
1264 syspath);
1265 } else if (*alias != 0) {
1266 ret = g_strdup(alias);
1267 }
1268 }
1269
1270 out:
1271 udev_unref(udev);
1272 udev_device_unref(udevice);
1273 return ret;
1274 }
1275
1276 static char *get_device_for_syspath(const char *syspath)
1277 {
1278 struct udev *udev = NULL;
1279 struct udev_device *udevice = NULL;
1280 char *ret = NULL;
1281
1282 udev = udev_new();
1283 if (udev == NULL) {
1284 g_debug("failed to query udev");
1285 goto out;
1286 }
1287 udevice = udev_device_new_from_syspath(udev, syspath);
1288 if (udevice == NULL) {
1289 g_debug("failed to query udev for path: %s", syspath);
1290 goto out;
1291 } else {
1292 ret = g_strdup(udev_device_get_devnode(udevice));
1293 }
1294
1295 out:
1296 udev_unref(udev);
1297 udev_device_unref(udevice);
1298 return ret;
1299 }
1300
1301 static void get_disk_deps(const char *disk_dir, GuestDiskInfo *disk)
1302 {
1303 g_autofree char *deps_dir = NULL;
1304 const gchar *dep;
1305 GDir *dp_deps = NULL;
1306
1307 /* List dependent disks */
1308 deps_dir = g_strdup_printf("%s/slaves", disk_dir);
1309 g_debug(" listing entries in: %s", deps_dir);
1310 dp_deps = g_dir_open(deps_dir, 0, NULL);
1311 if (dp_deps == NULL) {
1312 g_debug("failed to list entries in %s", deps_dir);
1313 return;
1314 }
1315 disk->has_dependencies = true;
1316 while ((dep = g_dir_read_name(dp_deps)) != NULL) {
1317 g_autofree char *dep_dir = NULL;
1318 char *dev_name;
1319
1320 /* Add dependent disks */
1321 dep_dir = g_strdup_printf("%s/%s", deps_dir, dep);
1322 dev_name = get_device_for_syspath(dep_dir);
1323 if (dev_name != NULL) {
1324 g_debug(" adding dependent device: %s", dev_name);
1325 QAPI_LIST_PREPEND(disk->dependencies, dev_name);
1326 }
1327 }
1328 g_dir_close(dp_deps);
1329 }
1330
1331 /*
1332 * Detect partitions subdirectory, name is "<disk_name><number>" or
1333 * "<disk_name>p<number>"
1334 *
1335 * @disk_name -- last component of /sys path (e.g. sda)
1336 * @disk_dir -- sys path of the disk (e.g. /sys/block/sda)
1337 * @disk_dev -- device node of the disk (e.g. /dev/sda)
1338 */
1339 static GuestDiskInfoList *get_disk_partitions(
1340 GuestDiskInfoList *list,
1341 const char *disk_name, const char *disk_dir,
1342 const char *disk_dev)
1343 {
1344 GuestDiskInfoList *ret = list;
1345 struct dirent *de_disk;
1346 DIR *dp_disk = NULL;
1347 size_t len = strlen(disk_name);
1348
1349 dp_disk = opendir(disk_dir);
1350 while ((de_disk = readdir(dp_disk)) != NULL) {
1351 g_autofree char *partition_dir = NULL;
1352 char *dev_name;
1353 GuestDiskInfo *partition;
1354
1355 if (!(de_disk->d_type & DT_DIR)) {
1356 continue;
1357 }
1358
1359 if (!(strncmp(disk_name, de_disk->d_name, len) == 0 &&
1360 ((*(de_disk->d_name + len) == 'p' &&
1361 isdigit(*(de_disk->d_name + len + 1))) ||
1362 isdigit(*(de_disk->d_name + len))))) {
1363 continue;
1364 }
1365
1366 partition_dir = g_strdup_printf("%s/%s",
1367 disk_dir, de_disk->d_name);
1368 dev_name = get_device_for_syspath(partition_dir);
1369 if (dev_name == NULL) {
1370 g_debug("Failed to get device name for syspath: %s",
1371 disk_dir);
1372 continue;
1373 }
1374 partition = g_new0(GuestDiskInfo, 1);
1375 partition->name = dev_name;
1376 partition->partition = true;
1377 partition->has_dependencies = true;
1378 /* Add parent disk as dependent for easier tracking of hierarchy */
1379 QAPI_LIST_PREPEND(partition->dependencies, g_strdup(disk_dev));
1380
1381 QAPI_LIST_PREPEND(ret, partition);
1382 }
1383 closedir(dp_disk);
1384
1385 return ret;
1386 }
1387
1388 static void get_nvme_smart(GuestDiskInfo *disk)
1389 {
1390 int fd;
1391 GuestNVMeSmart *smart;
1392 NvmeSmartLog log = {0};
1393 struct nvme_admin_cmd cmd = {
1394 .opcode = NVME_ADM_CMD_GET_LOG_PAGE,
1395 .nsid = NVME_NSID_BROADCAST,
1396 .addr = (uintptr_t)&log,
1397 .data_len = sizeof(log),
1398 .cdw10 = NVME_LOG_SMART_INFO | (1 << 15) /* RAE bit */
1399 | (((sizeof(log) >> 2) - 1) << 16)
1400 };
1401
1402 fd = qga_open_cloexec(disk->name, O_RDONLY, 0);
1403 if (fd == -1) {
1404 g_debug("Failed to open device: %s: %s", disk->name, g_strerror(errno));
1405 return;
1406 }
1407
1408 if (ioctl(fd, NVME_IOCTL_ADMIN_CMD, &cmd)) {
1409 g_debug("Failed to get smart: %s: %s", disk->name, g_strerror(errno));
1410 close(fd);
1411 return;
1412 }
1413
1414 disk->smart = g_new0(GuestDiskSmart, 1);
1415 disk->smart->type = GUEST_DISK_BUS_TYPE_NVME;
1416
1417 smart = &disk->smart->u.nvme;
1418 smart->critical_warning = log.critical_warning;
1419 smart->temperature = lduw_le_p(&log.temperature); /* unaligned field */
1420 smart->available_spare = log.available_spare;
1421 smart->available_spare_threshold = log.available_spare_threshold;
1422 smart->percentage_used = log.percentage_used;
1423 smart->data_units_read_lo = le64_to_cpu(log.data_units_read[0]);
1424 smart->data_units_read_hi = le64_to_cpu(log.data_units_read[1]);
1425 smart->data_units_written_lo = le64_to_cpu(log.data_units_written[0]);
1426 smart->data_units_written_hi = le64_to_cpu(log.data_units_written[1]);
1427 smart->host_read_commands_lo = le64_to_cpu(log.host_read_commands[0]);
1428 smart->host_read_commands_hi = le64_to_cpu(log.host_read_commands[1]);
1429 smart->host_write_commands_lo = le64_to_cpu(log.host_write_commands[0]);
1430 smart->host_write_commands_hi = le64_to_cpu(log.host_write_commands[1]);
1431 smart->controller_busy_time_lo = le64_to_cpu(log.controller_busy_time[0]);
1432 smart->controller_busy_time_hi = le64_to_cpu(log.controller_busy_time[1]);
1433 smart->power_cycles_lo = le64_to_cpu(log.power_cycles[0]);
1434 smart->power_cycles_hi = le64_to_cpu(log.power_cycles[1]);
1435 smart->power_on_hours_lo = le64_to_cpu(log.power_on_hours[0]);
1436 smart->power_on_hours_hi = le64_to_cpu(log.power_on_hours[1]);
1437 smart->unsafe_shutdowns_lo = le64_to_cpu(log.unsafe_shutdowns[0]);
1438 smart->unsafe_shutdowns_hi = le64_to_cpu(log.unsafe_shutdowns[1]);
1439 smart->media_errors_lo = le64_to_cpu(log.media_errors[0]);
1440 smart->media_errors_hi = le64_to_cpu(log.media_errors[1]);
1441 smart->number_of_error_log_entries_lo =
1442 le64_to_cpu(log.number_of_error_log_entries[0]);
1443 smart->number_of_error_log_entries_hi =
1444 le64_to_cpu(log.number_of_error_log_entries[1]);
1445
1446 close(fd);
1447 }
1448
1449 static void get_disk_smart(GuestDiskInfo *disk)
1450 {
1451 if (disk->address
1452 && (disk->address->bus_type == GUEST_DISK_BUS_TYPE_NVME)) {
1453 get_nvme_smart(disk);
1454 }
1455 }
1456
1457 GuestDiskInfoList *qmp_guest_get_disks(Error **errp)
1458 {
1459 GuestDiskInfoList *ret = NULL;
1460 GuestDiskInfo *disk;
1461 DIR *dp = NULL;
1462 struct dirent *de = NULL;
1463
1464 g_debug("listing /sys/block directory");
1465 dp = opendir("/sys/block");
1466 if (dp == NULL) {
1467 error_setg_errno(errp, errno, "Can't open directory \"/sys/block\"");
1468 return NULL;
1469 }
1470 while ((de = readdir(dp)) != NULL) {
1471 g_autofree char *disk_dir = NULL, *line = NULL,
1472 *size_path = NULL;
1473 char *dev_name;
1474 Error *local_err = NULL;
1475 if (de->d_type != DT_LNK) {
1476 g_debug(" skipping entry: %s", de->d_name);
1477 continue;
1478 }
1479
1480 /* Check size and skip zero-sized disks */
1481 g_debug(" checking disk size");
1482 size_path = g_strdup_printf("/sys/block/%s/size", de->d_name);
1483 if (!g_file_get_contents(size_path, &line, NULL, NULL)) {
1484 g_debug(" failed to read disk size");
1485 continue;
1486 }
1487 if (g_strcmp0(line, "0\n") == 0) {
1488 g_debug(" skipping zero-sized disk");
1489 continue;
1490 }
1491
1492 g_debug(" adding %s", de->d_name);
1493 disk_dir = g_strdup_printf("/sys/block/%s", de->d_name);
1494 dev_name = get_device_for_syspath(disk_dir);
1495 if (dev_name == NULL) {
1496 g_debug("Failed to get device name for syspath: %s",
1497 disk_dir);
1498 continue;
1499 }
1500 disk = g_new0(GuestDiskInfo, 1);
1501 disk->name = dev_name;
1502 disk->partition = false;
1503 disk->alias = get_alias_for_syspath(disk_dir);
1504 QAPI_LIST_PREPEND(ret, disk);
1505
1506 /* Get address for non-virtual devices */
1507 bool is_virtual = is_disk_virtual(disk_dir, &local_err);
1508 if (local_err != NULL) {
1509 g_debug(" failed to check disk path, ignoring error: %s",
1510 error_get_pretty(local_err));
1511 error_free(local_err);
1512 local_err = NULL;
1513 /* Don't try to get the address */
1514 is_virtual = true;
1515 }
1516 if (!is_virtual) {
1517 disk->address = get_disk_address(disk_dir, &local_err);
1518 if (local_err != NULL) {
1519 g_debug(" failed to get device info, ignoring error: %s",
1520 error_get_pretty(local_err));
1521 error_free(local_err);
1522 local_err = NULL;
1523 }
1524 }
1525
1526 get_disk_deps(disk_dir, disk);
1527 get_disk_smart(disk);
1528 ret = get_disk_partitions(ret, de->d_name, disk_dir, dev_name);
1529 }
1530
1531 closedir(dp);
1532
1533 return ret;
1534 }
1535
1536 #else
1537
1538 GuestDiskInfoList *qmp_guest_get_disks(Error **errp)
1539 {
1540 error_setg(errp, QERR_UNSUPPORTED);
1541 return NULL;
1542 }
1543
1544 #endif
1545
1546 /* Return a list of the disk device(s)' info which @mount lies on */
1547 static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount,
1548 Error **errp)
1549 {
1550 GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs));
1551 struct statvfs buf;
1552 unsigned long used, nonroot_total, fr_size;
1553 char *devpath = g_strdup_printf("/sys/dev/block/%u:%u",
1554 mount->devmajor, mount->devminor);
1555
1556 fs->mountpoint = g_strdup(mount->dirname);
1557 fs->type = g_strdup(mount->devtype);
1558 build_guest_fsinfo_for_device(devpath, fs, errp);
1559
1560 if (statvfs(fs->mountpoint, &buf) == 0) {
1561 fr_size = buf.f_frsize;
1562 used = buf.f_blocks - buf.f_bfree;
1563 nonroot_total = used + buf.f_bavail;
1564 fs->used_bytes = used * fr_size;
1565 fs->total_bytes = nonroot_total * fr_size;
1566
1567 fs->has_total_bytes = true;
1568 fs->has_used_bytes = true;
1569 }
1570
1571 g_free(devpath);
1572
1573 return fs;
1574 }
1575
1576 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
1577 {
1578 FsMountList mounts;
1579 struct FsMount *mount;
1580 GuestFilesystemInfoList *ret = NULL;
1581 Error *local_err = NULL;
1582
1583 QTAILQ_INIT(&mounts);
1584 if (!build_fs_mount_list(&mounts, &local_err)) {
1585 error_propagate(errp, local_err);
1586 return NULL;
1587 }
1588
1589 QTAILQ_FOREACH(mount, &mounts, next) {
1590 g_debug("Building guest fsinfo for '%s'", mount->dirname);
1591
1592 QAPI_LIST_PREPEND(ret, build_guest_fsinfo(mount, &local_err));
1593 if (local_err) {
1594 error_propagate(errp, local_err);
1595 qapi_free_GuestFilesystemInfoList(ret);
1596 ret = NULL;
1597 break;
1598 }
1599 }
1600
1601 free_fs_mount_list(&mounts);
1602 return ret;
1603 }
1604 #endif /* CONFIG_FSFREEZE */
1605
1606 #if defined(CONFIG_FSTRIM)
1607 /*
1608 * Walk list of mounted file systems in the guest, and trim them.
1609 */
1610 GuestFilesystemTrimResponse *
1611 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
1612 {
1613 GuestFilesystemTrimResponse *response;
1614 GuestFilesystemTrimResult *result;
1615 int ret = 0;
1616 FsMountList mounts;
1617 struct FsMount *mount;
1618 int fd;
1619 struct fstrim_range r;
1620
1621 slog("guest-fstrim called");
1622
1623 QTAILQ_INIT(&mounts);
1624 if (!build_fs_mount_list(&mounts, errp)) {
1625 return NULL;
1626 }
1627
1628 response = g_malloc0(sizeof(*response));
1629
1630 QTAILQ_FOREACH(mount, &mounts, next) {
1631 result = g_malloc0(sizeof(*result));
1632 result->path = g_strdup(mount->dirname);
1633
1634 QAPI_LIST_PREPEND(response->paths, result);
1635
1636 fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0);
1637 if (fd == -1) {
1638 result->error = g_strdup_printf("failed to open: %s",
1639 strerror(errno));
1640 continue;
1641 }
1642
1643 /* We try to cull filesystems we know won't work in advance, but other
1644 * filesystems may not implement fstrim for less obvious reasons.
1645 * These will report EOPNOTSUPP; while in some other cases ENOTTY
1646 * will be reported (e.g. CD-ROMs).
1647 * Any other error means an unexpected error.
1648 */
1649 r.start = 0;
1650 r.len = -1;
1651 r.minlen = has_minimum ? minimum : 0;
1652 ret = ioctl(fd, FITRIM, &r);
1653 if (ret == -1) {
1654 if (errno == ENOTTY || errno == EOPNOTSUPP) {
1655 result->error = g_strdup("trim not supported");
1656 } else {
1657 result->error = g_strdup_printf("failed to trim: %s",
1658 strerror(errno));
1659 }
1660 close(fd);
1661 continue;
1662 }
1663
1664 result->has_minimum = true;
1665 result->minimum = r.minlen;
1666 result->has_trimmed = true;
1667 result->trimmed = r.len;
1668 close(fd);
1669 }
1670
1671 free_fs_mount_list(&mounts);
1672 return response;
1673 }
1674 #endif /* CONFIG_FSTRIM */
1675
1676
1677 #define LINUX_SYS_STATE_FILE "/sys/power/state"
1678 #define SUSPEND_SUPPORTED 0
1679 #define SUSPEND_NOT_SUPPORTED 1
1680
1681 typedef enum {
1682 SUSPEND_MODE_DISK = 0,
1683 SUSPEND_MODE_RAM = 1,
1684 SUSPEND_MODE_HYBRID = 2,
1685 } SuspendMode;
1686
1687 /*
1688 * Executes a command in a child process using g_spawn_sync,
1689 * returning an int >= 0 representing the exit status of the
1690 * process.
1691 *
1692 * If the program wasn't found in path, returns -1.
1693 *
1694 * If a problem happened when creating the child process,
1695 * returns -1 and errp is set.
1696 */
1697 static int run_process_child(const char *command[], Error **errp)
1698 {
1699 int exit_status, spawn_flag;
1700 GError *g_err = NULL;
1701 bool success;
1702
1703 spawn_flag = G_SPAWN_SEARCH_PATH | G_SPAWN_STDOUT_TO_DEV_NULL |
1704 G_SPAWN_STDERR_TO_DEV_NULL;
1705
1706 success = g_spawn_sync(NULL, (char **)command, NULL, spawn_flag,
1707 NULL, NULL, NULL, NULL,
1708 &exit_status, &g_err);
1709
1710 if (success) {
1711 return WEXITSTATUS(exit_status);
1712 }
1713
1714 if (g_err && (g_err->code != G_SPAWN_ERROR_NOENT)) {
1715 error_setg(errp, "failed to create child process, error '%s'",
1716 g_err->message);
1717 }
1718
1719 g_error_free(g_err);
1720 return -1;
1721 }
1722
1723 static bool systemd_supports_mode(SuspendMode mode, Error **errp)
1724 {
1725 const char *systemctl_args[3] = {"systemd-hibernate", "systemd-suspend",
1726 "systemd-hybrid-sleep"};
1727 const char *cmd[4] = {"systemctl", "status", systemctl_args[mode], NULL};
1728 int status;
1729
1730 status = run_process_child(cmd, errp);
1731
1732 /*
1733 * systemctl status uses LSB return codes so we can expect
1734 * status > 0 and be ok. To assert if the guest has support
1735 * for the selected suspend mode, status should be < 4. 4 is
1736 * the code for unknown service status, the return value when
1737 * the service does not exist. A common value is status = 3
1738 * (program is not running).
1739 */
1740 if (status > 0 && status < 4) {
1741 return true;
1742 }
1743
1744 return false;
1745 }
1746
1747 static void systemd_suspend(SuspendMode mode, Error **errp)
1748 {
1749 Error *local_err = NULL;
1750 const char *systemctl_args[3] = {"hibernate", "suspend", "hybrid-sleep"};
1751 const char *cmd[3] = {"systemctl", systemctl_args[mode], NULL};
1752 int status;
1753
1754 status = run_process_child(cmd, &local_err);
1755
1756 if (status == 0) {
1757 return;
1758 }
1759
1760 if ((status == -1) && !local_err) {
1761 error_setg(errp, "the helper program 'systemctl %s' was not found",
1762 systemctl_args[mode]);
1763 return;
1764 }
1765
1766 if (local_err) {
1767 error_propagate(errp, local_err);
1768 } else {
1769 error_setg(errp, "the helper program 'systemctl %s' returned an "
1770 "unexpected exit status code (%d)",
1771 systemctl_args[mode], status);
1772 }
1773 }
1774
1775 static bool pmutils_supports_mode(SuspendMode mode, Error **errp)
1776 {
1777 Error *local_err = NULL;
1778 const char *pmutils_args[3] = {"--hibernate", "--suspend",
1779 "--suspend-hybrid"};
1780 const char *cmd[3] = {"pm-is-supported", pmutils_args[mode], NULL};
1781 int status;
1782
1783 status = run_process_child(cmd, &local_err);
1784
1785 if (status == SUSPEND_SUPPORTED) {
1786 return true;
1787 }
1788
1789 if ((status == -1) && !local_err) {
1790 return false;
1791 }
1792
1793 if (local_err) {
1794 error_propagate(errp, local_err);
1795 } else {
1796 error_setg(errp,
1797 "the helper program '%s' returned an unexpected exit"
1798 " status code (%d)", "pm-is-supported", status);
1799 }
1800
1801 return false;
1802 }
1803
1804 static void pmutils_suspend(SuspendMode mode, Error **errp)
1805 {
1806 Error *local_err = NULL;
1807 const char *pmutils_binaries[3] = {"pm-hibernate", "pm-suspend",
1808 "pm-suspend-hybrid"};
1809 const char *cmd[2] = {pmutils_binaries[mode], NULL};
1810 int status;
1811
1812 status = run_process_child(cmd, &local_err);
1813
1814 if (status == 0) {
1815 return;
1816 }
1817
1818 if ((status == -1) && !local_err) {
1819 error_setg(errp, "the helper program '%s' was not found",
1820 pmutils_binaries[mode]);
1821 return;
1822 }
1823
1824 if (local_err) {
1825 error_propagate(errp, local_err);
1826 } else {
1827 error_setg(errp,
1828 "the helper program '%s' returned an unexpected exit"
1829 " status code (%d)", pmutils_binaries[mode], status);
1830 }
1831 }
1832
1833 static bool linux_sys_state_supports_mode(SuspendMode mode, Error **errp)
1834 {
1835 const char *sysfile_strs[3] = {"disk", "mem", NULL};
1836 const char *sysfile_str = sysfile_strs[mode];
1837 char buf[32]; /* hopefully big enough */
1838 int fd;
1839 ssize_t ret;
1840
1841 if (!sysfile_str) {
1842 error_setg(errp, "unknown guest suspend mode");
1843 return false;
1844 }
1845
1846 fd = open(LINUX_SYS_STATE_FILE, O_RDONLY);
1847 if (fd < 0) {
1848 return false;
1849 }
1850
1851 ret = read(fd, buf, sizeof(buf) - 1);
1852 close(fd);
1853 if (ret <= 0) {
1854 return false;
1855 }
1856 buf[ret] = '\0';
1857
1858 if (strstr(buf, sysfile_str)) {
1859 return true;
1860 }
1861 return false;
1862 }
1863
1864 static void linux_sys_state_suspend(SuspendMode mode, Error **errp)
1865 {
1866 Error *local_err = NULL;
1867 const char *sysfile_strs[3] = {"disk", "mem", NULL};
1868 const char *sysfile_str = sysfile_strs[mode];
1869 pid_t pid;
1870 int status;
1871
1872 if (!sysfile_str) {
1873 error_setg(errp, "unknown guest suspend mode");
1874 return;
1875 }
1876
1877 pid = fork();
1878 if (!pid) {
1879 /* child */
1880 int fd;
1881
1882 setsid();
1883 reopen_fd_to_null(0);
1884 reopen_fd_to_null(1);
1885 reopen_fd_to_null(2);
1886
1887 fd = open(LINUX_SYS_STATE_FILE, O_WRONLY);
1888 if (fd < 0) {
1889 _exit(EXIT_FAILURE);
1890 }
1891
1892 if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) {
1893 _exit(EXIT_FAILURE);
1894 }
1895
1896 _exit(EXIT_SUCCESS);
1897 } else if (pid < 0) {
1898 error_setg_errno(errp, errno, "failed to create child process");
1899 return;
1900 }
1901
1902 ga_wait_child(pid, &status, &local_err);
1903 if (local_err) {
1904 error_propagate(errp, local_err);
1905 return;
1906 }
1907
1908 if (WEXITSTATUS(status)) {
1909 error_setg(errp, "child process has failed to suspend");
1910 }
1911
1912 }
1913
1914 static void guest_suspend(SuspendMode mode, Error **errp)
1915 {
1916 Error *local_err = NULL;
1917 bool mode_supported = false;
1918
1919 if (systemd_supports_mode(mode, &local_err)) {
1920 mode_supported = true;
1921 systemd_suspend(mode, &local_err);
1922 }
1923
1924 if (!local_err) {
1925 return;
1926 }
1927
1928 error_free(local_err);
1929 local_err = NULL;
1930
1931 if (pmutils_supports_mode(mode, &local_err)) {
1932 mode_supported = true;
1933 pmutils_suspend(mode, &local_err);
1934 }
1935
1936 if (!local_err) {
1937 return;
1938 }
1939
1940 error_free(local_err);
1941 local_err = NULL;
1942
1943 if (linux_sys_state_supports_mode(mode, &local_err)) {
1944 mode_supported = true;
1945 linux_sys_state_suspend(mode, &local_err);
1946 }
1947
1948 if (!mode_supported) {
1949 error_free(local_err);
1950 error_setg(errp,
1951 "the requested suspend mode is not supported by the guest");
1952 } else {
1953 error_propagate(errp, local_err);
1954 }
1955 }
1956
1957 void qmp_guest_suspend_disk(Error **errp)
1958 {
1959 guest_suspend(SUSPEND_MODE_DISK, errp);
1960 }
1961
1962 void qmp_guest_suspend_ram(Error **errp)
1963 {
1964 guest_suspend(SUSPEND_MODE_RAM, errp);
1965 }
1966
1967 void qmp_guest_suspend_hybrid(Error **errp)
1968 {
1969 guest_suspend(SUSPEND_MODE_HYBRID, errp);
1970 }
1971
1972 /* Transfer online/offline status between @vcpu and the guest system.
1973 *
1974 * On input either @errp or *@errp must be NULL.
1975 *
1976 * In system-to-@vcpu direction, the following @vcpu fields are accessed:
1977 * - R: vcpu->logical_id
1978 * - W: vcpu->online
1979 * - W: vcpu->can_offline
1980 *
1981 * In @vcpu-to-system direction, the following @vcpu fields are accessed:
1982 * - R: vcpu->logical_id
1983 * - R: vcpu->online
1984 *
1985 * Written members remain unmodified on error.
1986 */
1987 static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu,
1988 char *dirpath, Error **errp)
1989 {
1990 int fd;
1991 int res;
1992 int dirfd;
1993 static const char fn[] = "online";
1994
1995 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
1996 if (dirfd == -1) {
1997 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
1998 return;
1999 }
2000
2001 fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR);
2002 if (fd == -1) {
2003 if (errno != ENOENT) {
2004 error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn);
2005 } else if (sys2vcpu) {
2006 vcpu->online = true;
2007 vcpu->can_offline = false;
2008 } else if (!vcpu->online) {
2009 error_setg(errp, "logical processor #%" PRId64 " can't be "
2010 "offlined", vcpu->logical_id);
2011 } /* otherwise pretend successful re-onlining */
2012 } else {
2013 unsigned char status;
2014
2015 res = pread(fd, &status, 1, 0);
2016 if (res == -1) {
2017 error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn);
2018 } else if (res == 0) {
2019 error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath,
2020 fn);
2021 } else if (sys2vcpu) {
2022 vcpu->online = (status != '0');
2023 vcpu->can_offline = true;
2024 } else if (vcpu->online != (status != '0')) {
2025 status = '0' + vcpu->online;
2026 if (pwrite(fd, &status, 1, 0) == -1) {
2027 error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath,
2028 fn);
2029 }
2030 } /* otherwise pretend successful re-(on|off)-lining */
2031
2032 res = close(fd);
2033 g_assert(res == 0);
2034 }
2035
2036 res = close(dirfd);
2037 g_assert(res == 0);
2038 }
2039
2040 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
2041 {
2042 GuestLogicalProcessorList *head, **tail;
2043 const char *cpu_dir = "/sys/devices/system/cpu";
2044 const gchar *line;
2045 g_autoptr(GDir) cpu_gdir = NULL;
2046 Error *local_err = NULL;
2047
2048 head = NULL;
2049 tail = &head;
2050 cpu_gdir = g_dir_open(cpu_dir, 0, NULL);
2051
2052 if (cpu_gdir == NULL) {
2053 error_setg_errno(errp, errno, "failed to list entries: %s", cpu_dir);
2054 return NULL;
2055 }
2056
2057 while (local_err == NULL && (line = g_dir_read_name(cpu_gdir)) != NULL) {
2058 GuestLogicalProcessor *vcpu;
2059 int64_t id;
2060 if (sscanf(line, "cpu%" PRId64, &id)) {
2061 g_autofree char *path = g_strdup_printf("/sys/devices/system/cpu/"
2062 "cpu%" PRId64 "/", id);
2063 vcpu = g_malloc0(sizeof *vcpu);
2064 vcpu->logical_id = id;
2065 vcpu->has_can_offline = true; /* lolspeak ftw */
2066 transfer_vcpu(vcpu, true, path, &local_err);
2067 QAPI_LIST_APPEND(tail, vcpu);
2068 }
2069 }
2070
2071 if (local_err == NULL) {
2072 /* there's no guest with zero VCPUs */
2073 g_assert(head != NULL);
2074 return head;
2075 }
2076
2077 qapi_free_GuestLogicalProcessorList(head);
2078 error_propagate(errp, local_err);
2079 return NULL;
2080 }
2081
2082 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
2083 {
2084 int64_t processed;
2085 Error *local_err = NULL;
2086
2087 processed = 0;
2088 while (vcpus != NULL) {
2089 char *path = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/",
2090 vcpus->value->logical_id);
2091
2092 transfer_vcpu(vcpus->value, false, path, &local_err);
2093 g_free(path);
2094 if (local_err != NULL) {
2095 break;
2096 }
2097 ++processed;
2098 vcpus = vcpus->next;
2099 }
2100
2101 if (local_err != NULL) {
2102 if (processed == 0) {
2103 error_propagate(errp, local_err);
2104 } else {
2105 error_free(local_err);
2106 }
2107 }
2108
2109 return processed;
2110 }
2111 #endif /* __linux__ */
2112
2113 #if defined(__linux__) || defined(__FreeBSD__)
2114 void qmp_guest_set_user_password(const char *username,
2115 const char *password,
2116 bool crypted,
2117 Error **errp)
2118 {
2119 Error *local_err = NULL;
2120 char *passwd_path = NULL;
2121 pid_t pid;
2122 int status;
2123 int datafd[2] = { -1, -1 };
2124 char *rawpasswddata = NULL;
2125 size_t rawpasswdlen;
2126 char *chpasswddata = NULL;
2127 size_t chpasswdlen;
2128
2129 rawpasswddata = (char *)qbase64_decode(password, -1, &rawpasswdlen, errp);
2130 if (!rawpasswddata) {
2131 return;
2132 }
2133 rawpasswddata = g_renew(char, rawpasswddata, rawpasswdlen + 1);
2134 rawpasswddata[rawpasswdlen] = '\0';
2135
2136 if (strchr(rawpasswddata, '\n')) {
2137 error_setg(errp, "forbidden characters in raw password");
2138 goto out;
2139 }
2140
2141 if (strchr(username, '\n') ||
2142 strchr(username, ':')) {
2143 error_setg(errp, "forbidden characters in username");
2144 goto out;
2145 }
2146
2147 #ifdef __FreeBSD__
2148 chpasswddata = g_strdup(rawpasswddata);
2149 passwd_path = g_find_program_in_path("pw");
2150 #else
2151 chpasswddata = g_strdup_printf("%s:%s\n", username, rawpasswddata);
2152 passwd_path = g_find_program_in_path("chpasswd");
2153 #endif
2154
2155 chpasswdlen = strlen(chpasswddata);
2156
2157 if (!passwd_path) {
2158 error_setg(errp, "cannot find 'passwd' program in PATH");
2159 goto out;
2160 }
2161
2162 if (!g_unix_open_pipe(datafd, FD_CLOEXEC, NULL)) {
2163 error_setg(errp, "cannot create pipe FDs");
2164 goto out;
2165 }
2166
2167 pid = fork();
2168 if (pid == 0) {
2169 close(datafd[1]);
2170 /* child */
2171 setsid();
2172 dup2(datafd[0], 0);
2173 reopen_fd_to_null(1);
2174 reopen_fd_to_null(2);
2175
2176 #ifdef __FreeBSD__
2177 const char *h_arg;
2178 h_arg = (crypted) ? "-H" : "-h";
2179 execl(passwd_path, "pw", "usermod", "-n", username, h_arg, "0", NULL);
2180 #else
2181 if (crypted) {
2182 execl(passwd_path, "chpasswd", "-e", NULL);
2183 } else {
2184 execl(passwd_path, "chpasswd", NULL);
2185 }
2186 #endif
2187 _exit(EXIT_FAILURE);
2188 } else if (pid < 0) {
2189 error_setg_errno(errp, errno, "failed to create child process");
2190 goto out;
2191 }
2192 close(datafd[0]);
2193 datafd[0] = -1;
2194
2195 if (qemu_write_full(datafd[1], chpasswddata, chpasswdlen) != chpasswdlen) {
2196 error_setg_errno(errp, errno, "cannot write new account password");
2197 goto out;
2198 }
2199 close(datafd[1]);
2200 datafd[1] = -1;
2201
2202 ga_wait_child(pid, &status, &local_err);
2203 if (local_err) {
2204 error_propagate(errp, local_err);
2205 goto out;
2206 }
2207
2208 if (!WIFEXITED(status)) {
2209 error_setg(errp, "child process has terminated abnormally");
2210 goto out;
2211 }
2212
2213 if (WEXITSTATUS(status)) {
2214 error_setg(errp, "child process has failed to set user password");
2215 goto out;
2216 }
2217
2218 out:
2219 g_free(chpasswddata);
2220 g_free(rawpasswddata);
2221 g_free(passwd_path);
2222 if (datafd[0] != -1) {
2223 close(datafd[0]);
2224 }
2225 if (datafd[1] != -1) {
2226 close(datafd[1]);
2227 }
2228 }
2229 #else /* __linux__ || __FreeBSD__ */
2230 void qmp_guest_set_user_password(const char *username,
2231 const char *password,
2232 bool crypted,
2233 Error **errp)
2234 {
2235 error_setg(errp, QERR_UNSUPPORTED);
2236 }
2237 #endif /* __linux__ || __FreeBSD__ */
2238
2239 #ifdef __linux__
2240 static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf,
2241 int size, Error **errp)
2242 {
2243 int fd;
2244 int res;
2245
2246 errno = 0;
2247 fd = openat(dirfd, pathname, O_RDONLY);
2248 if (fd == -1) {
2249 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname);
2250 return;
2251 }
2252
2253 res = pread(fd, buf, size, 0);
2254 if (res == -1) {
2255 error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname);
2256 } else if (res == 0) {
2257 error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname);
2258 }
2259 close(fd);
2260 }
2261
2262 static void ga_write_sysfs_file(int dirfd, const char *pathname,
2263 const char *buf, int size, Error **errp)
2264 {
2265 int fd;
2266
2267 errno = 0;
2268 fd = openat(dirfd, pathname, O_WRONLY);
2269 if (fd == -1) {
2270 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname);
2271 return;
2272 }
2273
2274 if (pwrite(fd, buf, size, 0) == -1) {
2275 error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname);
2276 }
2277
2278 close(fd);
2279 }
2280
2281 /* Transfer online/offline status between @mem_blk and the guest system.
2282 *
2283 * On input either @errp or *@errp must be NULL.
2284 *
2285 * In system-to-@mem_blk direction, the following @mem_blk fields are accessed:
2286 * - R: mem_blk->phys_index
2287 * - W: mem_blk->online
2288 * - W: mem_blk->can_offline
2289 *
2290 * In @mem_blk-to-system direction, the following @mem_blk fields are accessed:
2291 * - R: mem_blk->phys_index
2292 * - R: mem_blk->online
2293 *- R: mem_blk->can_offline
2294 * Written members remain unmodified on error.
2295 */
2296 static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk,
2297 GuestMemoryBlockResponse *result,
2298 Error **errp)
2299 {
2300 char *dirpath;
2301 int dirfd;
2302 char *status;
2303 Error *local_err = NULL;
2304
2305 if (!sys2memblk) {
2306 DIR *dp;
2307
2308 if (!result) {
2309 error_setg(errp, "Internal error, 'result' should not be NULL");
2310 return;
2311 }
2312 errno = 0;
2313 dp = opendir("/sys/devices/system/memory/");
2314 /* if there is no 'memory' directory in sysfs,
2315 * we think this VM does not support online/offline memory block,
2316 * any other solution?
2317 */
2318 if (!dp) {
2319 if (errno == ENOENT) {
2320 result->response =
2321 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED;
2322 }
2323 goto out1;
2324 }
2325 closedir(dp);
2326 }
2327
2328 dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/",
2329 mem_blk->phys_index);
2330 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2331 if (dirfd == -1) {
2332 if (sys2memblk) {
2333 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2334 } else {
2335 if (errno == ENOENT) {
2336 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND;
2337 } else {
2338 result->response =
2339 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2340 }
2341 }
2342 g_free(dirpath);
2343 goto out1;
2344 }
2345 g_free(dirpath);
2346
2347 status = g_malloc0(10);
2348 ga_read_sysfs_file(dirfd, "state", status, 10, &local_err);
2349 if (local_err) {
2350 /* treat with sysfs file that not exist in old kernel */
2351 if (errno == ENOENT) {
2352 error_free(local_err);
2353 if (sys2memblk) {
2354 mem_blk->online = true;
2355 mem_blk->can_offline = false;
2356 } else if (!mem_blk->online) {
2357 result->response =
2358 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED;
2359 }
2360 } else {
2361 if (sys2memblk) {
2362 error_propagate(errp, local_err);
2363 } else {
2364 error_free(local_err);
2365 result->response =
2366 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2367 }
2368 }
2369 goto out2;
2370 }
2371
2372 if (sys2memblk) {
2373 char removable = '0';
2374
2375 mem_blk->online = (strncmp(status, "online", 6) == 0);
2376
2377 ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err);
2378 if (local_err) {
2379 /* if no 'removable' file, it doesn't support offline mem blk */
2380 if (errno == ENOENT) {
2381 error_free(local_err);
2382 mem_blk->can_offline = false;
2383 } else {
2384 error_propagate(errp, local_err);
2385 }
2386 } else {
2387 mem_blk->can_offline = (removable != '0');
2388 }
2389 } else {
2390 if (mem_blk->online != (strncmp(status, "online", 6) == 0)) {
2391 const char *new_state = mem_blk->online ? "online" : "offline";
2392
2393 ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state),
2394 &local_err);
2395 if (local_err) {
2396 error_free(local_err);
2397 result->response =
2398 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2399 goto out2;
2400 }
2401
2402 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS;
2403 result->has_error_code = false;
2404 } /* otherwise pretend successful re-(on|off)-lining */
2405 }
2406 g_free(status);
2407 close(dirfd);
2408 return;
2409
2410 out2:
2411 g_free(status);
2412 close(dirfd);
2413 out1:
2414 if (!sys2memblk) {
2415 result->has_error_code = true;
2416 result->error_code = errno;
2417 }
2418 }
2419
2420 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp)
2421 {
2422 GuestMemoryBlockList *head, **tail;
2423 Error *local_err = NULL;
2424 struct dirent *de;
2425 DIR *dp;
2426
2427 head = NULL;
2428 tail = &head;
2429
2430 dp = opendir("/sys/devices/system/memory/");
2431 if (!dp) {
2432 /* it's ok if this happens to be a system that doesn't expose
2433 * memory blocks via sysfs, but otherwise we should report
2434 * an error
2435 */
2436 if (errno != ENOENT) {
2437 error_setg_errno(errp, errno, "Can't open directory"
2438 "\"/sys/devices/system/memory/\"");
2439 }
2440 return NULL;
2441 }
2442
2443 /* Note: the phys_index of memory block may be discontinuous,
2444 * this is because a memblk is the unit of the Sparse Memory design, which
2445 * allows discontinuous memory ranges (ex. NUMA), so here we should
2446 * traverse the memory block directory.
2447 */
2448 while ((de = readdir(dp)) != NULL) {
2449 GuestMemoryBlock *mem_blk;
2450
2451 if ((strncmp(de->d_name, "memory", 6) != 0) ||
2452 !(de->d_type & DT_DIR)) {
2453 continue;
2454 }
2455
2456 mem_blk = g_malloc0(sizeof *mem_blk);
2457 /* The d_name is "memoryXXX", phys_index is block id, same as XXX */
2458 mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10);
2459 mem_blk->has_can_offline = true; /* lolspeak ftw */
2460 transfer_memory_block(mem_blk, true, NULL, &local_err);
2461 if (local_err) {
2462 break;
2463 }
2464
2465 QAPI_LIST_APPEND(tail, mem_blk);
2466 }
2467
2468 closedir(dp);
2469 if (local_err == NULL) {
2470 /* there's no guest with zero memory blocks */
2471 if (head == NULL) {
2472 error_setg(errp, "guest reported zero memory blocks!");
2473 }
2474 return head;
2475 }
2476
2477 qapi_free_GuestMemoryBlockList(head);
2478 error_propagate(errp, local_err);
2479 return NULL;
2480 }
2481
2482 GuestMemoryBlockResponseList *
2483 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp)
2484 {
2485 GuestMemoryBlockResponseList *head, **tail;
2486 Error *local_err = NULL;
2487
2488 head = NULL;
2489 tail = &head;
2490
2491 while (mem_blks != NULL) {
2492 GuestMemoryBlockResponse *result;
2493 GuestMemoryBlock *current_mem_blk = mem_blks->value;
2494
2495 result = g_malloc0(sizeof(*result));
2496 result->phys_index = current_mem_blk->phys_index;
2497 transfer_memory_block(current_mem_blk, false, result, &local_err);
2498 if (local_err) { /* should never happen */
2499 goto err;
2500 }
2501
2502 QAPI_LIST_APPEND(tail, result);
2503 mem_blks = mem_blks->next;
2504 }
2505
2506 return head;
2507 err:
2508 qapi_free_GuestMemoryBlockResponseList(head);
2509 error_propagate(errp, local_err);
2510 return NULL;
2511 }
2512
2513 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp)
2514 {
2515 Error *local_err = NULL;
2516 char *dirpath;
2517 int dirfd;
2518 char *buf;
2519 GuestMemoryBlockInfo *info;
2520
2521 dirpath = g_strdup_printf("/sys/devices/system/memory/");
2522 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2523 if (dirfd == -1) {
2524 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2525 g_free(dirpath);
2526 return NULL;
2527 }
2528 g_free(dirpath);
2529
2530 buf = g_malloc0(20);
2531 ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err);
2532 close(dirfd);
2533 if (local_err) {
2534 g_free(buf);
2535 error_propagate(errp, local_err);
2536 return NULL;
2537 }
2538
2539 info = g_new0(GuestMemoryBlockInfo, 1);
2540 info->size = strtol(buf, NULL, 16); /* the unit is bytes */
2541
2542 g_free(buf);
2543
2544 return info;
2545 }
2546
2547 #define MAX_NAME_LEN 128
2548 static GuestDiskStatsInfoList *guest_get_diskstats(Error **errp)
2549 {
2550 #ifdef CONFIG_LINUX
2551 GuestDiskStatsInfoList *head = NULL, **tail = &head;
2552 const char *diskstats = "/proc/diskstats";
2553 FILE *fp;
2554 size_t n;
2555 char *line = NULL;
2556
2557 fp = fopen(diskstats, "r");
2558 if (fp == NULL) {
2559 error_setg_errno(errp, errno, "open(\"%s\")", diskstats);
2560 return NULL;
2561 }
2562
2563 while (getline(&line, &n, fp) != -1) {
2564 g_autofree GuestDiskStatsInfo *diskstatinfo = NULL;
2565 g_autofree GuestDiskStats *diskstat = NULL;
2566 char dev_name[MAX_NAME_LEN];
2567 unsigned int ios_pgr, tot_ticks, rq_ticks, wr_ticks, dc_ticks, fl_ticks;
2568 unsigned long rd_ios, rd_merges_or_rd_sec, rd_ticks_or_wr_sec, wr_ios;
2569 unsigned long wr_merges, rd_sec_or_wr_ios, wr_sec;
2570 unsigned long dc_ios, dc_merges, dc_sec, fl_ios;
2571 unsigned int major, minor;
2572 int i;
2573
2574 i = sscanf(line, "%u %u %s %lu %lu %lu"
2575 "%lu %lu %lu %lu %u %u %u %u"
2576 "%lu %lu %lu %u %lu %u",
2577 &major, &minor, dev_name,
2578 &rd_ios, &rd_merges_or_rd_sec, &rd_sec_or_wr_ios,
2579 &rd_ticks_or_wr_sec, &wr_ios, &wr_merges, &wr_sec,
2580 &wr_ticks, &ios_pgr, &tot_ticks, &rq_ticks,
2581 &dc_ios, &dc_merges, &dc_sec, &dc_ticks,
2582 &fl_ios, &fl_ticks);
2583
2584 if (i < 7) {
2585 continue;
2586 }
2587
2588 diskstatinfo = g_new0(GuestDiskStatsInfo, 1);
2589 diskstatinfo->name = g_strdup(dev_name);
2590 diskstatinfo->major = major;
2591 diskstatinfo->minor = minor;
2592
2593 diskstat = g_new0(GuestDiskStats, 1);
2594 if (i == 7) {
2595 diskstat->has_read_ios = true;
2596 diskstat->read_ios = rd_ios;
2597 diskstat->has_read_sectors = true;
2598 diskstat->read_sectors = rd_merges_or_rd_sec;
2599 diskstat->has_write_ios = true;
2600 diskstat->write_ios = rd_sec_or_wr_ios;
2601 diskstat->has_write_sectors = true;
2602 diskstat->write_sectors = rd_ticks_or_wr_sec;
2603 }
2604 if (i >= 14) {
2605 diskstat->has_read_ios = true;
2606 diskstat->read_ios = rd_ios;
2607 diskstat->has_read_sectors = true;
2608 diskstat->read_sectors = rd_sec_or_wr_ios;
2609 diskstat->has_read_merges = true;
2610 diskstat->read_merges = rd_merges_or_rd_sec;
2611 diskstat->has_read_ticks = true;
2612 diskstat->read_ticks = rd_ticks_or_wr_sec;
2613 diskstat->has_write_ios = true;
2614 diskstat->write_ios = wr_ios;
2615 diskstat->has_write_sectors = true;
2616 diskstat->write_sectors = wr_sec;
2617 diskstat->has_write_merges = true;
2618 diskstat->write_merges = wr_merges;
2619 diskstat->has_write_ticks = true;
2620 diskstat->write_ticks = wr_ticks;
2621 diskstat->has_ios_pgr = true;
2622 diskstat->ios_pgr = ios_pgr;
2623 diskstat->has_total_ticks = true;
2624 diskstat->total_ticks = tot_ticks;
2625 diskstat->has_weight_ticks = true;
2626 diskstat->weight_ticks = rq_ticks;
2627 }
2628 if (i >= 18) {
2629 diskstat->has_discard_ios = true;
2630 diskstat->discard_ios = dc_ios;
2631 diskstat->has_discard_merges = true;
2632 diskstat->discard_merges = dc_merges;
2633 diskstat->has_discard_sectors = true;
2634 diskstat->discard_sectors = dc_sec;
2635 diskstat->has_discard_ticks = true;
2636 diskstat->discard_ticks = dc_ticks;
2637 }
2638 if (i >= 20) {
2639 diskstat->has_flush_ios = true;
2640 diskstat->flush_ios = fl_ios;
2641 diskstat->has_flush_ticks = true;
2642 diskstat->flush_ticks = fl_ticks;
2643 }
2644
2645 diskstatinfo->stats = g_steal_pointer(&diskstat);
2646 QAPI_LIST_APPEND(tail, diskstatinfo);
2647 diskstatinfo = NULL;
2648 }
2649 free(line);
2650 fclose(fp);
2651 return head;
2652 #else
2653 g_debug("disk stats reporting available only for Linux");
2654 return NULL;
2655 #endif
2656 }
2657
2658 GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp)
2659 {
2660 return guest_get_diskstats(errp);
2661 }
2662
2663 GuestCpuStatsList *qmp_guest_get_cpustats(Error **errp)
2664 {
2665 GuestCpuStatsList *head = NULL, **tail = &head;
2666 const char *cpustats = "/proc/stat";
2667 int clk_tck = sysconf(_SC_CLK_TCK);
2668 FILE *fp;
2669 size_t n;
2670 char *line = NULL;
2671
2672 fp = fopen(cpustats, "r");
2673 if (fp == NULL) {
2674 error_setg_errno(errp, errno, "open(\"%s\")", cpustats);
2675 return NULL;
2676 }
2677
2678 while (getline(&line, &n, fp) != -1) {
2679 GuestCpuStats *cpustat = NULL;
2680 GuestLinuxCpuStats *linuxcpustat;
2681 int i;
2682 unsigned long user, system, idle, iowait, irq, softirq, steal, guest;
2683 unsigned long nice, guest_nice;
2684 char name[64];
2685
2686 i = sscanf(line, "%s %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu",
2687 name, &user, &nice, &system, &idle, &iowait, &irq, &softirq,
2688 &steal, &guest, &guest_nice);
2689
2690 /* drop "cpu 1 2 3 ...", get "cpuX 1 2 3 ..." only */
2691 if ((i == EOF) || strncmp(name, "cpu", 3) || (name[3] == '\0')) {
2692 continue;
2693 }
2694
2695 if (i < 5) {
2696 slog("Parsing cpu stat from %s failed, see \"man proc\"", cpustats);
2697 break;
2698 }
2699
2700 cpustat = g_new0(GuestCpuStats, 1);
2701 cpustat->type = GUEST_CPU_STATS_TYPE_LINUX;
2702
2703 linuxcpustat = &cpustat->u.q_linux;
2704 linuxcpustat->cpu = atoi(&name[3]);
2705 linuxcpustat->user = user * 1000 / clk_tck;
2706 linuxcpustat->nice = nice * 1000 / clk_tck;
2707 linuxcpustat->system = system * 1000 / clk_tck;
2708 linuxcpustat->idle = idle * 1000 / clk_tck;
2709
2710 if (i > 5) {
2711 linuxcpustat->has_iowait = true;
2712 linuxcpustat->iowait = iowait * 1000 / clk_tck;
2713 }
2714
2715 if (i > 6) {
2716 linuxcpustat->has_irq = true;
2717 linuxcpustat->irq = irq * 1000 / clk_tck;
2718 linuxcpustat->has_softirq = true;
2719 linuxcpustat->softirq = softirq * 1000 / clk_tck;
2720 }
2721
2722 if (i > 8) {
2723 linuxcpustat->has_steal = true;
2724 linuxcpustat->steal = steal * 1000 / clk_tck;
2725 }
2726
2727 if (i > 9) {
2728 linuxcpustat->has_guest = true;
2729 linuxcpustat->guest = guest * 1000 / clk_tck;
2730 }
2731
2732 if (i > 10) {
2733 linuxcpustat->has_guest = true;
2734 linuxcpustat->guest = guest * 1000 / clk_tck;
2735 linuxcpustat->has_guestnice = true;
2736 linuxcpustat->guestnice = guest_nice * 1000 / clk_tck;
2737 }
2738
2739 QAPI_LIST_APPEND(tail, cpustat);
2740 }
2741
2742 free(line);
2743 fclose(fp);
2744 return head;
2745 }
2746
2747 #else /* defined(__linux__) */
2748
2749 void qmp_guest_suspend_disk(Error **errp)
2750 {
2751 error_setg(errp, QERR_UNSUPPORTED);
2752 }
2753
2754 void qmp_guest_suspend_ram(Error **errp)
2755 {
2756 error_setg(errp, QERR_UNSUPPORTED);
2757 }
2758
2759 void qmp_guest_suspend_hybrid(Error **errp)
2760 {
2761 error_setg(errp, QERR_UNSUPPORTED);
2762 }
2763
2764 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
2765 {
2766 error_setg(errp, QERR_UNSUPPORTED);
2767 return NULL;
2768 }
2769
2770 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
2771 {
2772 error_setg(errp, QERR_UNSUPPORTED);
2773 return -1;
2774 }
2775
2776 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp)
2777 {
2778 error_setg(errp, QERR_UNSUPPORTED);
2779 return NULL;
2780 }
2781
2782 GuestMemoryBlockResponseList *
2783 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp)
2784 {
2785 error_setg(errp, QERR_UNSUPPORTED);
2786 return NULL;
2787 }
2788
2789 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp)
2790 {
2791 error_setg(errp, QERR_UNSUPPORTED);
2792 return NULL;
2793 }
2794
2795 #endif
2796
2797 #ifdef HAVE_GETIFADDRS
2798 static GuestNetworkInterface *
2799 guest_find_interface(GuestNetworkInterfaceList *head,
2800 const char *name)
2801 {
2802 for (; head; head = head->next) {
2803 if (strcmp(head->value->name, name) == 0) {
2804 return head->value;
2805 }
2806 }
2807
2808 return NULL;
2809 }
2810
2811 static int guest_get_network_stats(const char *name,
2812 GuestNetworkInterfaceStat *stats)
2813 {
2814 #ifdef CONFIG_LINUX
2815 int name_len;
2816 char const *devinfo = "/proc/net/dev";
2817 FILE *fp;
2818 char *line = NULL, *colon;
2819 size_t n = 0;
2820 fp = fopen(devinfo, "r");
2821 if (!fp) {
2822 g_debug("failed to open network stats %s: %s", devinfo,
2823 g_strerror(errno));
2824 return -1;
2825 }
2826 name_len = strlen(name);
2827 while (getline(&line, &n, fp) != -1) {
2828 long long dummy;
2829 long long rx_bytes;
2830 long long rx_packets;
2831 long long rx_errs;
2832 long long rx_dropped;
2833 long long tx_bytes;
2834 long long tx_packets;
2835 long long tx_errs;
2836 long long tx_dropped;
2837 char *trim_line;
2838 trim_line = g_strchug(line);
2839 if (trim_line[0] == '\0') {
2840 continue;
2841 }
2842 colon = strchr(trim_line, ':');
2843 if (!colon) {
2844 continue;
2845 }
2846 if (colon - name_len == trim_line &&
2847 strncmp(trim_line, name, name_len) == 0) {
2848 if (sscanf(colon + 1,
2849 "%lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld",
2850 &rx_bytes, &rx_packets, &rx_errs, &rx_dropped,
2851 &dummy, &dummy, &dummy, &dummy,
2852 &tx_bytes, &tx_packets, &tx_errs, &tx_dropped,
2853 &dummy, &dummy, &dummy, &dummy) != 16) {
2854 continue;
2855 }
2856 stats->rx_bytes = rx_bytes;
2857 stats->rx_packets = rx_packets;
2858 stats->rx_errs = rx_errs;
2859 stats->rx_dropped = rx_dropped;
2860 stats->tx_bytes = tx_bytes;
2861 stats->tx_packets = tx_packets;
2862 stats->tx_errs = tx_errs;
2863 stats->tx_dropped = tx_dropped;
2864 fclose(fp);
2865 g_free(line);
2866 return 0;
2867 }
2868 }
2869 fclose(fp);
2870 g_free(line);
2871 g_debug("/proc/net/dev: Interface '%s' not found", name);
2872 #else /* !CONFIG_LINUX */
2873 g_debug("Network stats reporting available only for Linux");
2874 #endif /* !CONFIG_LINUX */
2875 return -1;
2876 }
2877
2878 #ifndef CONFIG_BSD
2879 /*
2880 * Fill "buf" with MAC address by ifaddrs. Pointer buf must point to a
2881 * buffer with ETHER_ADDR_LEN length at least.
2882 *
2883 * Returns false in case of an error, otherwise true. "obtained" argument
2884 * is true if a MAC address was obtained successful, otherwise false.
2885 */
2886 bool guest_get_hw_addr(struct ifaddrs *ifa, unsigned char *buf,
2887 bool *obtained, Error **errp)
2888 {
2889 struct ifreq ifr;
2890 int sock;
2891
2892 *obtained = false;
2893
2894 /* we haven't obtained HW address yet */
2895 sock = socket(PF_INET, SOCK_STREAM, 0);
2896 if (sock == -1) {
2897 error_setg_errno(errp, errno, "failed to create socket");
2898 return false;
2899 }
2900
2901 memset(&ifr, 0, sizeof(ifr));
2902 pstrcpy(ifr.ifr_name, IF_NAMESIZE, ifa->ifa_name);
2903 if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) {
2904 /*
2905 * We can't get the hw addr of this interface, but that's not a
2906 * fatal error.
2907 */
2908 if (errno == EADDRNOTAVAIL) {
2909 /* The interface doesn't have a hw addr (e.g. loopback). */
2910 g_debug("failed to get MAC address of %s: %s",
2911 ifa->ifa_name, strerror(errno));
2912 } else{
2913 g_warning("failed to get MAC address of %s: %s",
2914 ifa->ifa_name, strerror(errno));
2915 }
2916 } else {
2917 #ifdef CONFIG_SOLARIS
2918 memcpy(buf, &ifr.ifr_addr.sa_data, ETHER_ADDR_LEN);
2919 #else
2920 memcpy(buf, &ifr.ifr_hwaddr.sa_data, ETHER_ADDR_LEN);
2921 #endif
2922 *obtained = true;
2923 }
2924 close(sock);
2925 return true;
2926 }
2927 #endif /* CONFIG_BSD */
2928
2929 /*
2930 * Build information about guest interfaces
2931 */
2932 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
2933 {
2934 GuestNetworkInterfaceList *head = NULL, **tail = &head;
2935 struct ifaddrs *ifap, *ifa;
2936
2937 if (getifaddrs(&ifap) < 0) {
2938 error_setg_errno(errp, errno, "getifaddrs failed");
2939 goto error;
2940 }
2941
2942 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
2943 GuestNetworkInterface *info;
2944 GuestIpAddressList **address_tail;
2945 GuestIpAddress *address_item = NULL;
2946 GuestNetworkInterfaceStat *interface_stat = NULL;
2947 char addr4[INET_ADDRSTRLEN];
2948 char addr6[INET6_ADDRSTRLEN];
2949 unsigned char mac_addr[ETHER_ADDR_LEN];
2950 bool obtained;
2951 void *p;
2952
2953 g_debug("Processing %s interface", ifa->ifa_name);
2954
2955 info = guest_find_interface(head, ifa->ifa_name);
2956
2957 if (!info) {
2958 info = g_malloc0(sizeof(*info));
2959 info->name = g_strdup(ifa->ifa_name);
2960
2961 QAPI_LIST_APPEND(tail, info);
2962 }
2963
2964 if (!info->hardware_address) {
2965 if (!guest_get_hw_addr(ifa, mac_addr, &obtained, errp)) {
2966 goto error;
2967 }
2968 if (obtained) {
2969 info->hardware_address =
2970 g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x",
2971 (int) mac_addr[0], (int) mac_addr[1],
2972 (int) mac_addr[2], (int) mac_addr[3],
2973 (int) mac_addr[4], (int) mac_addr[5]);
2974 }
2975 }
2976
2977 if (ifa->ifa_addr &&
2978 ifa->ifa_addr->sa_family == AF_INET) {
2979 /* interface with IPv4 address */
2980 p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
2981 if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) {
2982 error_setg_errno(errp, errno, "inet_ntop failed");
2983 goto error;
2984 }
2985
2986 address_item = g_malloc0(sizeof(*address_item));
2987 address_item->ip_address = g_strdup(addr4);
2988 address_item->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4;
2989
2990 if (ifa->ifa_netmask) {
2991 /* Count the number of set bits in netmask.
2992 * This is safe as '1' and '0' cannot be shuffled in netmask. */
2993 p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr;
2994 address_item->prefix = ctpop32(((uint32_t *) p)[0]);
2995 }
2996 } else if (ifa->ifa_addr &&
2997 ifa->ifa_addr->sa_family == AF_INET6) {
2998 /* interface with IPv6 address */
2999 p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
3000 if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) {
3001 error_setg_errno(errp, errno, "inet_ntop failed");
3002 goto error;
3003 }
3004
3005 address_item = g_malloc0(sizeof(*address_item));
3006 address_item->ip_address = g_strdup(addr6);
3007 address_item->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6;
3008
3009 if (ifa->ifa_netmask) {
3010 /* Count the number of set bits in netmask.
3011 * This is safe as '1' and '0' cannot be shuffled in netmask. */
3012 p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr;
3013 address_item->prefix =
3014 ctpop32(((uint32_t *) p)[0]) +
3015 ctpop32(((uint32_t *) p)[1]) +
3016 ctpop32(((uint32_t *) p)[2]) +
3017 ctpop32(((uint32_t *) p)[3]);
3018 }
3019 }
3020
3021 if (!address_item) {
3022 continue;
3023 }
3024
3025 address_tail = &info->ip_addresses;
3026 while (*address_tail) {
3027 address_tail = &(*address_tail)->next;
3028 }
3029 QAPI_LIST_APPEND(address_tail, address_item);
3030
3031 info->has_ip_addresses = true;
3032
3033 if (!info->statistics) {
3034 interface_stat = g_malloc0(sizeof(*interface_stat));
3035 if (guest_get_network_stats(info->name, interface_stat) == -1) {
3036 g_free(interface_stat);
3037 } else {
3038 info->statistics = interface_stat;
3039 }
3040 }
3041 }
3042
3043 freeifaddrs(ifap);
3044 return head;
3045
3046 error:
3047 freeifaddrs(ifap);
3048 qapi_free_GuestNetworkInterfaceList(head);
3049 return NULL;
3050 }
3051
3052 #else
3053
3054 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
3055 {
3056 error_setg(errp, QERR_UNSUPPORTED);
3057 return NULL;
3058 }
3059
3060 #endif /* HAVE_GETIFADDRS */
3061
3062 #if !defined(CONFIG_FSFREEZE)
3063
3064 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
3065 {
3066 error_setg(errp, QERR_UNSUPPORTED);
3067 return NULL;
3068 }
3069
3070 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
3071 {
3072 error_setg(errp, QERR_UNSUPPORTED);
3073
3074 return 0;
3075 }
3076
3077 int64_t qmp_guest_fsfreeze_freeze(Error **errp)
3078 {
3079 error_setg(errp, QERR_UNSUPPORTED);
3080
3081 return 0;
3082 }
3083
3084 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
3085 strList *mountpoints,
3086 Error **errp)
3087 {
3088 error_setg(errp, QERR_UNSUPPORTED);
3089
3090 return 0;
3091 }
3092
3093 int64_t qmp_guest_fsfreeze_thaw(Error **errp)
3094 {
3095 error_setg(errp, QERR_UNSUPPORTED);
3096
3097 return 0;
3098 }
3099
3100 GuestDiskInfoList *qmp_guest_get_disks(Error **errp)
3101 {
3102 error_setg(errp, QERR_UNSUPPORTED);
3103 return NULL;
3104 }
3105
3106 GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp)
3107 {
3108 error_setg(errp, QERR_UNSUPPORTED);
3109 return NULL;
3110 }
3111
3112 GuestCpuStatsList *qmp_guest_get_cpustats(Error **errp)
3113 {
3114 error_setg(errp, QERR_UNSUPPORTED);
3115 return NULL;
3116 }
3117
3118 #endif /* CONFIG_FSFREEZE */
3119
3120 #if !defined(CONFIG_FSTRIM)
3121 GuestFilesystemTrimResponse *
3122 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
3123 {
3124 error_setg(errp, QERR_UNSUPPORTED);
3125 return NULL;
3126 }
3127 #endif
3128
3129 /* add unsupported commands to the list of blocked RPCs */
3130 GList *ga_command_init_blockedrpcs(GList *blockedrpcs)
3131 {
3132 #if !defined(__linux__)
3133 {
3134 const char *list[] = {
3135 "guest-suspend-disk", "guest-suspend-ram",
3136 "guest-suspend-hybrid", "guest-get-vcpus", "guest-set-vcpus",
3137 "guest-get-memory-blocks", "guest-set-memory-blocks",
3138 "guest-get-memory-block-size", "guest-get-memory-block-info",
3139 NULL};
3140 char **p = (char **)list;
3141
3142 while (*p) {
3143 blockedrpcs = g_list_append(blockedrpcs, g_strdup(*p++));
3144 }
3145 }
3146 #endif
3147
3148 #if !defined(HAVE_GETIFADDRS)
3149 blockedrpcs = g_list_append(blockedrpcs,
3150 g_strdup("guest-network-get-interfaces"));
3151 #endif
3152
3153 #if !defined(CONFIG_FSFREEZE)
3154 {
3155 const char *list[] = {
3156 "guest-get-fsinfo", "guest-fsfreeze-status",
3157 "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list",
3158 "guest-fsfreeze-thaw", "guest-get-fsinfo",
3159 "guest-get-disks", NULL};
3160 char **p = (char **)list;
3161
3162 while (*p) {
3163 blockedrpcs = g_list_append(blockedrpcs, g_strdup(*p++));
3164 }
3165 }
3166 #endif
3167
3168 #if !defined(CONFIG_FSTRIM)
3169 blockedrpcs = g_list_append(blockedrpcs, g_strdup("guest-fstrim"));
3170 #endif
3171
3172 blockedrpcs = g_list_append(blockedrpcs, g_strdup("guest-get-devices"));
3173
3174 return blockedrpcs;
3175 }
3176
3177 /* register init/cleanup routines for stateful command groups */
3178 void ga_command_state_init(GAState *s, GACommandState *cs)
3179 {
3180 #if defined(CONFIG_FSFREEZE)
3181 ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup);
3182 #endif
3183 }
3184
3185 #ifdef HAVE_UTMPX
3186
3187 #define QGA_MICRO_SECOND_TO_SECOND 1000000
3188
3189 static double ga_get_login_time(struct utmpx *user_info)
3190 {
3191 double seconds = (double)user_info->ut_tv.tv_sec;
3192 double useconds = (double)user_info->ut_tv.tv_usec;
3193 useconds /= QGA_MICRO_SECOND_TO_SECOND;
3194 return seconds + useconds;
3195 }
3196
3197 GuestUserList *qmp_guest_get_users(Error **errp)
3198 {
3199 GHashTable *cache = NULL;
3200 GuestUserList *head = NULL, **tail = &head;
3201 struct utmpx *user_info = NULL;
3202 gpointer value = NULL;
3203 GuestUser *user = NULL;
3204 double login_time = 0;
3205
3206 cache = g_hash_table_new(g_str_hash, g_str_equal);
3207 setutxent();
3208
3209 for (;;) {
3210 user_info = getutxent();
3211 if (user_info == NULL) {
3212 break;
3213 } else if (user_info->ut_type != USER_PROCESS) {
3214 continue;
3215 } else if (g_hash_table_contains(cache, user_info->ut_user)) {
3216 value = g_hash_table_lookup(cache, user_info->ut_user);
3217 user = (GuestUser *)value;
3218 login_time = ga_get_login_time(user_info);
3219 /* We're ensuring the earliest login time to be sent */
3220 if (login_time < user->login_time) {
3221 user->login_time = login_time;
3222 }
3223 continue;
3224 }
3225
3226 user = g_new0(GuestUser, 1);
3227 user->user = g_strdup(user_info->ut_user);
3228 user->login_time = ga_get_login_time(user_info);
3229
3230 g_hash_table_insert(cache, user->user, user);
3231
3232 QAPI_LIST_APPEND(tail, user);
3233 }
3234 endutxent();
3235 g_hash_table_destroy(cache);
3236 return head;
3237 }
3238
3239 #else
3240
3241 GuestUserList *qmp_guest_get_users(Error **errp)
3242 {
3243 error_setg(errp, QERR_UNSUPPORTED);
3244 return NULL;
3245 }
3246
3247 #endif
3248
3249 /* Replace escaped special characters with theire real values. The replacement
3250 * is done in place -- returned value is in the original string.
3251 */
3252 static void ga_osrelease_replace_special(gchar *value)
3253 {
3254 gchar *p, *p2, quote;
3255
3256 /* Trim the string at first space or semicolon if it is not enclosed in
3257 * single or double quotes. */
3258 if ((value[0] != '"') || (value[0] == '\'')) {
3259 p = strchr(value, ' ');
3260 if (p != NULL) {
3261 *p = 0;
3262 }
3263 p = strchr(value, ';');
3264 if (p != NULL) {
3265 *p = 0;
3266 }
3267 return;
3268 }
3269
3270 quote = value[0];
3271 p2 = value;
3272 p = value + 1;
3273 while (*p != 0) {
3274 if (*p == '\\') {
3275 p++;
3276 switch (*p) {
3277 case '$':
3278 case '\'':
3279 case '"':
3280 case '\\':
3281 case '`':
3282 break;
3283 default:
3284 /* Keep literal backslash followed by whatever is there */
3285 p--;
3286 break;
3287 }
3288 } else if (*p == quote) {
3289 *p2 = 0;
3290 break;
3291 }
3292 *(p2++) = *(p++);
3293 }
3294 }
3295
3296 static GKeyFile *ga_parse_osrelease(const char *fname)
3297 {
3298 gchar *content = NULL;
3299 gchar *content2 = NULL;
3300 GError *err = NULL;
3301 GKeyFile *keys = g_key_file_new();
3302 const char *group = "[os-release]\n";
3303
3304 if (!g_file_get_contents(fname, &content, NULL, &err)) {
3305 slog("failed to read '%s', error: %s", fname, err->message);
3306 goto fail;
3307 }
3308
3309 if (!g_utf8_validate(content, -1, NULL)) {
3310 slog("file is not utf-8 encoded: %s", fname);
3311 goto fail;
3312 }
3313 content2 = g_strdup_printf("%s%s", group, content);
3314
3315 if (!g_key_file_load_from_data(keys, content2, -1, G_KEY_FILE_NONE,
3316 &err)) {
3317 slog("failed to parse file '%s', error: %s", fname, err->message);
3318 goto fail;
3319 }
3320
3321 g_free(content);
3322 g_free(content2);
3323 return keys;
3324
3325 fail:
3326 g_error_free(err);
3327 g_free(content);
3328 g_free(content2);
3329 g_key_file_free(keys);
3330 return NULL;
3331 }
3332
3333 GuestOSInfo *qmp_guest_get_osinfo(Error **errp)
3334 {
3335 GuestOSInfo *info = NULL;
3336 struct utsname kinfo;
3337 GKeyFile *osrelease = NULL;
3338 const char *qga_os_release = g_getenv("QGA_OS_RELEASE");
3339
3340 info = g_new0(GuestOSInfo, 1);
3341
3342 if (uname(&kinfo) != 0) {
3343 error_setg_errno(errp, errno, "uname failed");
3344 } else {
3345 info->kernel_version = g_strdup(kinfo.version);
3346 info->kernel_release = g_strdup(kinfo.release);
3347 info->machine = g_strdup(kinfo.machine);
3348 }
3349
3350 if (qga_os_release != NULL) {
3351 osrelease = ga_parse_osrelease(qga_os_release);
3352 } else {
3353 osrelease = ga_parse_osrelease("/etc/os-release");
3354 if (osrelease == NULL) {
3355 osrelease = ga_parse_osrelease("/usr/lib/os-release");
3356 }
3357 }
3358
3359 if (osrelease != NULL) {
3360 char *value;
3361
3362 #define GET_FIELD(field, osfield) do { \
3363 value = g_key_file_get_value(osrelease, "os-release", osfield, NULL); \
3364 if (value != NULL) { \
3365 ga_osrelease_replace_special(value); \
3366 info->field = value; \
3367 } \
3368 } while (0)
3369 GET_FIELD(id, "ID");
3370 GET_FIELD(name, "NAME");
3371 GET_FIELD(pretty_name, "PRETTY_NAME");
3372 GET_FIELD(version, "VERSION");
3373 GET_FIELD(version_id, "VERSION_ID");
3374 GET_FIELD(variant, "VARIANT");
3375 GET_FIELD(variant_id, "VARIANT_ID");
3376 #undef GET_FIELD
3377
3378 g_key_file_free(osrelease);
3379 }
3380
3381 return info;
3382 }
3383
3384 GuestDeviceInfoList *qmp_guest_get_devices(Error **errp)
3385 {
3386 error_setg(errp, QERR_UNSUPPORTED);
3387
3388 return NULL;
3389 }
3390
3391 #ifndef HOST_NAME_MAX
3392 # ifdef _POSIX_HOST_NAME_MAX
3393 # define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
3394 # else
3395 # define HOST_NAME_MAX 255
3396 # endif
3397 #endif
3398
3399 char *qga_get_host_name(Error **errp)
3400 {
3401 long len = -1;
3402 g_autofree char *hostname = NULL;
3403
3404 #ifdef _SC_HOST_NAME_MAX
3405 len = sysconf(_SC_HOST_NAME_MAX);
3406 #endif /* _SC_HOST_NAME_MAX */
3407
3408 if (len < 0) {
3409 len = HOST_NAME_MAX;
3410 }
3411
3412 /* Unfortunately, gethostname() below does not guarantee a
3413 * NULL terminated string. Therefore, allocate one byte more
3414 * to be sure. */
3415 hostname = g_new0(char, len + 1);
3416
3417 if (gethostname(hostname, len) < 0) {
3418 error_setg_errno(errp, errno,
3419 "cannot get hostname");
3420 return NULL;
3421 }
3422
3423 return g_steal_pointer(&hostname);
3424 }