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Merge tag 'accel-sh4-ui-20240503' of https://github.com/philmd/qemu into staging
[qemu/armbru.git] / qga / commands-posix.c
blob7a065c4085c85e0516156300c03d841c00a369fd
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__) || defined(CONFIG_SOLARIS)
49 #include <net/if_arp.h>
50 #include <netinet/if_ether.h>
51 #if !defined(ETHER_ADDR_LEN) && defined(ETHERADDRL)
52 #define ETHER_ADDR_LEN ETHERADDRL
53 #endif
54 #else
55 #include <net/ethernet.h>
56 #endif
57 #ifdef CONFIG_SOLARIS
58 #include <sys/sockio.h>
59 #endif
60 #endif
61
62 static void ga_wait_child(pid_t pid, int *status, Error **errp)
63 {
64 pid_t rpid;
65
66 *status = 0;
67
68 rpid = RETRY_ON_EINTR(waitpid(pid, status, 0));
69
70 if (rpid == -1) {
71 error_setg_errno(errp, errno, "failed to wait for child (pid: %d)",
72 pid);
73 return;
74 }
75
76 g_assert(rpid == pid);
77 }
78
79 static ssize_t ga_pipe_read_str(int fd[2], char **str)
80 {
81 ssize_t n, len = 0;
82 char buf[1024];
83
84 close(fd[1]);
85 fd[1] = -1;
86 while ((n = read(fd[0], buf, sizeof(buf))) != 0) {
87 if (n < 0) {
88 if (errno == EINTR) {
89 continue;
90 } else {
91 len = -errno;
92 break;
93 }
94 }
95 *str = g_realloc(*str, len + n + 1);
96 memcpy(*str + len, buf, n);
97 len += n;
98 *str[len] = '\0';
99 }
100 close(fd[0]);
101 fd[0] = -1;
102
103 return len;
104 }
105
106 /*
107 * Helper to run command with input/output redirection,
108 * sending string to stdin and taking error message from
109 * stdout/err.
110 */
111 static int ga_run_command(const char *argv[], const char *in_str,
112 const char *action, Error **errp)
113 {
114 pid_t pid;
115 int status;
116 int retcode = -1;
117 int infd[2] = { -1, -1 };
118 int outfd[2] = { -1, -1 };
119 char *str = NULL;
120 ssize_t len = 0;
121
122 if ((in_str && !g_unix_open_pipe(infd, FD_CLOEXEC, NULL)) ||
123 !g_unix_open_pipe(outfd, FD_CLOEXEC, NULL)) {
124 error_setg(errp, "cannot create pipe FDs");
125 goto out;
126 }
127
128 pid = fork();
129 if (pid == 0) {
130 char *cherr = NULL;
131
132 setsid();
133
134 if (in_str) {
135 /* Redirect stdin to infd. */
136 close(infd[1]);
137 dup2(infd[0], 0);
138 close(infd[0]);
139 } else {
140 reopen_fd_to_null(0);
141 }
142
143 /* Redirect stdout/stderr to outfd. */
144 close(outfd[0]);
145 dup2(outfd[1], 1);
146 dup2(outfd[1], 2);
147 close(outfd[1]);
148
149 execvp(argv[0], (char *const *)argv);
150
151 /* Write the cause of failed exec to pipe for the parent to read it. */
152 cherr = g_strdup_printf("failed to exec '%s'", argv[0]);
153 perror(cherr);
154 g_free(cherr);
155 _exit(EXIT_FAILURE);
156 } else if (pid < 0) {
157 error_setg_errno(errp, errno, "failed to create child process");
158 goto out;
159 }
160
161 if (in_str) {
162 close(infd[0]);
163 infd[0] = -1;
164 if (qemu_write_full(infd[1], in_str, strlen(in_str)) !=
165 strlen(in_str)) {
166 error_setg_errno(errp, errno, "%s: cannot write to stdin pipe",
167 action);
168 goto out;
169 }
170 close(infd[1]);
171 infd[1] = -1;
172 }
173
174 len = ga_pipe_read_str(outfd, &str);
175 if (len < 0) {
176 error_setg_errno(errp, -len, "%s: cannot read from stdout/stderr pipe",
177 action);
178 goto out;
179 }
180
181 ga_wait_child(pid, &status, errp);
182 if (*errp) {
183 goto out;
184 }
185
186 if (!WIFEXITED(status)) {
187 if (len) {
188 error_setg(errp, "child process has terminated abnormally: %s",
189 str);
190 } else {
191 error_setg(errp, "child process has terminated abnormally");
192 }
193 goto out;
194 }
195
196 retcode = WEXITSTATUS(status);
197
198 if (WEXITSTATUS(status)) {
199 if (len) {
200 error_setg(errp, "child process has failed to %s: %s",
201 action, str);
202 } else {
203 error_setg(errp, "child process has failed to %s: exit status %d",
204 action, WEXITSTATUS(status));
205 }
206 goto out;
207 }
208
209 out:
210 g_free(str);
211
212 if (infd[0] != -1) {
213 close(infd[0]);
214 }
215 if (infd[1] != -1) {
216 close(infd[1]);
217 }
218 if (outfd[0] != -1) {
219 close(outfd[0]);
220 }
221 if (outfd[1] != -1) {
222 close(outfd[1]);
223 }
224
225 return retcode;
226 }
227
228 void qmp_guest_shutdown(const char *mode, Error **errp)
229 {
230 const char *shutdown_flag;
231 Error *local_err = NULL;
232
233 #ifdef CONFIG_SOLARIS
234 const char *powerdown_flag = "-i5";
235 const char *halt_flag = "-i0";
236 const char *reboot_flag = "-i6";
237 #elif defined(CONFIG_BSD)
238 const char *powerdown_flag = "-p";
239 const char *halt_flag = "-h";
240 const char *reboot_flag = "-r";
241 #else
242 const char *powerdown_flag = "-P";
243 const char *halt_flag = "-H";
244 const char *reboot_flag = "-r";
245 #endif
246
247 slog("guest-shutdown called, mode: %s", mode);
248 if (!mode || strcmp(mode, "powerdown") == 0) {
249 shutdown_flag = powerdown_flag;
250 } else if (strcmp(mode, "halt") == 0) {
251 shutdown_flag = halt_flag;
252 } else if (strcmp(mode, "reboot") == 0) {
253 shutdown_flag = reboot_flag;
254 } else {
255 error_setg(errp,
256 "mode is invalid (valid values are: halt|powerdown|reboot");
257 return;
258 }
259
260 const char *argv[] = {"/sbin/shutdown",
261 #ifdef CONFIG_SOLARIS
262 shutdown_flag, "-g0", "-y",
263 #elif defined(CONFIG_BSD)
264 shutdown_flag, "+0",
265 #else
266 "-h", shutdown_flag, "+0",
267 #endif
268 "hypervisor initiated shutdown", (char *) NULL};
269
270 ga_run_command(argv, NULL, "shutdown", &local_err);
271 if (local_err) {
272 error_propagate(errp, local_err);
273 return;
274 }
275
276 /* succeeded */
277 }
278
279 void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp)
280 {
281 int ret;
282 Error *local_err = NULL;
283 struct timeval tv;
284 const char *argv[] = {"/sbin/hwclock", has_time ? "-w" : "-s", NULL};
285
286 /* If user has passed a time, validate and set it. */
287 if (has_time) {
288 GDate date = { 0, };
289
290 /* year-2038 will overflow in case time_t is 32bit */
291 if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) {
292 error_setg(errp, "Time %" PRId64 " is too large", time_ns);
293 return;
294 }
295
296 tv.tv_sec = time_ns / 1000000000;
297 tv.tv_usec = (time_ns % 1000000000) / 1000;
298 g_date_set_time_t(&date, tv.tv_sec);
299 if (date.year < 1970 || date.year >= 2070) {
300 error_setg_errno(errp, errno, "Invalid time");
301 return;
302 }
303
304 ret = settimeofday(&tv, NULL);
305 if (ret < 0) {
306 error_setg_errno(errp, errno, "Failed to set time to guest");
307 return;
308 }
309 }
310
311 /* Now, if user has passed a time to set and the system time is set, we
312 * just need to synchronize the hardware clock. However, if no time was
313 * passed, user is requesting the opposite: set the system time from the
314 * hardware clock (RTC). */
315 ga_run_command(argv, NULL, "set hardware clock to system time",
316 &local_err);
317 if (local_err) {
318 error_propagate(errp, local_err);
319 return;
320 }
321 }
322
323 typedef enum {
324 RW_STATE_NEW,
325 RW_STATE_READING,
326 RW_STATE_WRITING,
327 } RwState;
328
329 struct GuestFileHandle {
330 uint64_t id;
331 FILE *fh;
332 RwState state;
333 QTAILQ_ENTRY(GuestFileHandle) next;
334 };
335
336 static struct {
337 QTAILQ_HEAD(, GuestFileHandle) filehandles;
338 } guest_file_state = {
339 .filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles),
340 };
341
342 static int64_t guest_file_handle_add(FILE *fh, Error **errp)
343 {
344 GuestFileHandle *gfh;
345 int64_t handle;
346
347 handle = ga_get_fd_handle(ga_state, errp);
348 if (handle < 0) {
349 return -1;
350 }
351
352 gfh = g_new0(GuestFileHandle, 1);
353 gfh->id = handle;
354 gfh->fh = fh;
355 QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next);
356
357 return handle;
358 }
359
360 GuestFileHandle *guest_file_handle_find(int64_t id, Error **errp)
361 {
362 GuestFileHandle *gfh;
363
364 QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next)
365 {
366 if (gfh->id == id) {
367 return gfh;
368 }
369 }
370
371 error_setg(errp, "handle '%" PRId64 "' has not been found", id);
372 return NULL;
373 }
374
375 typedef const char * const ccpc;
376
377 #ifndef O_BINARY
378 #define O_BINARY 0
379 #endif
380
381 /* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */
382 static const struct {
383 ccpc *forms;
384 int oflag_base;
385 } guest_file_open_modes[] = {
386 { (ccpc[]){ "r", NULL }, O_RDONLY },
387 { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY },
388 { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC },
389 { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY },
390 { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND },
391 { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY },
392 { (ccpc[]){ "r+", NULL }, O_RDWR },
393 { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY },
394 { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC },
395 { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY },
396 { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND },
397 { (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY }
398 };
399
400 static int
401 find_open_flag(const char *mode_str, Error **errp)
402 {
403 unsigned mode;
404
405 for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) {
406 ccpc *form;
407
408 form = guest_file_open_modes[mode].forms;
409 while (*form != NULL && strcmp(*form, mode_str) != 0) {
410 ++form;
411 }
412 if (*form != NULL) {
413 break;
414 }
415 }
416
417 if (mode == ARRAY_SIZE(guest_file_open_modes)) {
418 error_setg(errp, "invalid file open mode '%s'", mode_str);
419 return -1;
420 }
421 return guest_file_open_modes[mode].oflag_base | O_NOCTTY | O_NONBLOCK;
422 }
423
424 #define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \
425 S_IRGRP | S_IWGRP | \
426 S_IROTH | S_IWOTH)
427
428 static FILE *
429 safe_open_or_create(const char *path, const char *mode, Error **errp)
430 {
431 int oflag;
432 int fd = -1;
433 FILE *f = NULL;
434
435 oflag = find_open_flag(mode, errp);
436 if (oflag < 0) {
437 goto end;
438 }
439
440 /* If the caller wants / allows creation of a new file, we implement it
441 * with a two step process: open() + (open() / fchmod()).
442 *
443 * First we insist on creating the file exclusively as a new file. If
444 * that succeeds, we're free to set any file-mode bits on it. (The
445 * motivation is that we want to set those file-mode bits independently
446 * of the current umask.)
447 *
448 * If the exclusive creation fails because the file already exists
449 * (EEXIST is not possible for any other reason), we just attempt to
450 * open the file, but in this case we won't be allowed to change the
451 * file-mode bits on the preexistent file.
452 *
453 * The pathname should never disappear between the two open()s in
454 * practice. If it happens, then someone very likely tried to race us.
455 * In this case just go ahead and report the ENOENT from the second
456 * open() to the caller.
457 *
458 * If the caller wants to open a preexistent file, then the first
459 * open() is decisive and its third argument is ignored, and the second
460 * open() and the fchmod() are never called.
461 */
462 fd = qga_open_cloexec(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0);
463 if (fd == -1 && errno == EEXIST) {
464 oflag &= ~(unsigned)O_CREAT;
465 fd = qga_open_cloexec(path, oflag, 0);
466 }
467 if (fd == -1) {
468 error_setg_errno(errp, errno,
469 "failed to open file '%s' (mode: '%s')",
470 path, mode);
471 goto end;
472 }
473
474 if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) {
475 error_setg_errno(errp, errno, "failed to set permission "
476 "0%03o on new file '%s' (mode: '%s')",
477 (unsigned)DEFAULT_NEW_FILE_MODE, path, mode);
478 goto end;
479 }
480
481 f = fdopen(fd, mode);
482 if (f == NULL) {
483 error_setg_errno(errp, errno, "failed to associate stdio stream with "
484 "file descriptor %d, file '%s' (mode: '%s')",
485 fd, path, mode);
486 }
487
488 end:
489 if (f == NULL && fd != -1) {
490 close(fd);
491 if (oflag & O_CREAT) {
492 unlink(path);
493 }
494 }
495 return f;
496 }
497
498 int64_t qmp_guest_file_open(const char *path, const char *mode,
499 Error **errp)
500 {
501 FILE *fh;
502 Error *local_err = NULL;
503 int64_t handle;
504
505 if (!mode) {
506 mode = "r";
507 }
508 slog("guest-file-open called, filepath: %s, mode: %s", path, mode);
509 fh = safe_open_or_create(path, mode, &local_err);
510 if (local_err != NULL) {
511 error_propagate(errp, local_err);
512 return -1;
513 }
514
515 /* set fd non-blocking to avoid common use cases (like reading from a
516 * named pipe) from hanging the agent
517 */
518 if (!g_unix_set_fd_nonblocking(fileno(fh), true, NULL)) {
519 fclose(fh);
520 error_setg_errno(errp, errno, "Failed to set FD nonblocking");
521 return -1;
522 }
523
524 handle = guest_file_handle_add(fh, errp);
525 if (handle < 0) {
526 fclose(fh);
527 return -1;
528 }
529
530 slog("guest-file-open, handle: %" PRId64, handle);
531 return handle;
532 }
533
534 void qmp_guest_file_close(int64_t handle, Error **errp)
535 {
536 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
537 int ret;
538
539 slog("guest-file-close called, handle: %" PRId64, handle);
540 if (!gfh) {
541 return;
542 }
543
544 ret = fclose(gfh->fh);
545 if (ret == EOF) {
546 error_setg_errno(errp, errno, "failed to close handle");
547 return;
548 }
549
550 QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next);
551 g_free(gfh);
552 }
553
554 GuestFileRead *guest_file_read_unsafe(GuestFileHandle *gfh,
555 int64_t count, Error **errp)
556 {
557 GuestFileRead *read_data = NULL;
558 guchar *buf;
559 FILE *fh = gfh->fh;
560 size_t read_count;
561
562 /* explicitly flush when switching from writing to reading */
563 if (gfh->state == RW_STATE_WRITING) {
564 int ret = fflush(fh);
565 if (ret == EOF) {
566 error_setg_errno(errp, errno, "failed to flush file");
567 return NULL;
568 }
569 gfh->state = RW_STATE_NEW;
570 }
571
572 buf = g_malloc0(count + 1);
573 read_count = fread(buf, 1, count, fh);
574 if (ferror(fh)) {
575 error_setg_errno(errp, errno, "failed to read file");
576 } else {
577 buf[read_count] = 0;
578 read_data = g_new0(GuestFileRead, 1);
579 read_data->count = read_count;
580 read_data->eof = feof(fh);
581 if (read_count) {
582 read_data->buf_b64 = g_base64_encode(buf, read_count);
583 }
584 gfh->state = RW_STATE_READING;
585 }
586 g_free(buf);
587 clearerr(fh);
588
589 return read_data;
590 }
591
592 GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64,
593 bool has_count, int64_t count,
594 Error **errp)
595 {
596 GuestFileWrite *write_data = NULL;
597 guchar *buf;
598 gsize buf_len;
599 int write_count;
600 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
601 FILE *fh;
602
603 if (!gfh) {
604 return NULL;
605 }
606
607 fh = gfh->fh;
608
609 if (gfh->state == RW_STATE_READING) {
610 int ret = fseek(fh, 0, SEEK_CUR);
611 if (ret == -1) {
612 error_setg_errno(errp, errno, "failed to seek file");
613 return NULL;
614 }
615 gfh->state = RW_STATE_NEW;
616 }
617
618 buf = qbase64_decode(buf_b64, -1, &buf_len, errp);
619 if (!buf) {
620 return NULL;
621 }
622
623 if (!has_count) {
624 count = buf_len;
625 } else if (count < 0 || count > buf_len) {
626 error_setg(errp, "value '%" PRId64 "' is invalid for argument count",
627 count);
628 g_free(buf);
629 return NULL;
630 }
631
632 write_count = fwrite(buf, 1, count, fh);
633 if (ferror(fh)) {
634 error_setg_errno(errp, errno, "failed to write to file");
635 slog("guest-file-write failed, handle: %" PRId64, handle);
636 } else {
637 write_data = g_new0(GuestFileWrite, 1);
638 write_data->count = write_count;
639 write_data->eof = feof(fh);
640 gfh->state = RW_STATE_WRITING;
641 }
642 g_free(buf);
643 clearerr(fh);
644
645 return write_data;
646 }
647
648 struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset,
649 GuestFileWhence *whence_code,
650 Error **errp)
651 {
652 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
653 GuestFileSeek *seek_data = NULL;
654 FILE *fh;
655 int ret;
656 int whence;
657 Error *err = NULL;
658
659 if (!gfh) {
660 return NULL;
661 }
662
663 /* We stupidly exposed 'whence':'int' in our qapi */
664 whence = ga_parse_whence(whence_code, &err);
665 if (err) {
666 error_propagate(errp, err);
667 return NULL;
668 }
669
670 fh = gfh->fh;
671 ret = fseek(fh, offset, whence);
672 if (ret == -1) {
673 error_setg_errno(errp, errno, "failed to seek file");
674 if (errno == ESPIPE) {
675 /* file is non-seekable, stdio shouldn't be buffering anyways */
676 gfh->state = RW_STATE_NEW;
677 }
678 } else {
679 seek_data = g_new0(GuestFileSeek, 1);
680 seek_data->position = ftell(fh);
681 seek_data->eof = feof(fh);
682 gfh->state = RW_STATE_NEW;
683 }
684 clearerr(fh);
685
686 return seek_data;
687 }
688
689 void qmp_guest_file_flush(int64_t handle, Error **errp)
690 {
691 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
692 FILE *fh;
693 int ret;
694
695 if (!gfh) {
696 return;
697 }
698
699 fh = gfh->fh;
700 ret = fflush(fh);
701 if (ret == EOF) {
702 error_setg_errno(errp, errno, "failed to flush file");
703 } else {
704 gfh->state = RW_STATE_NEW;
705 }
706 }
707
708 #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM)
709 void free_fs_mount_list(FsMountList *mounts)
710 {
711 FsMount *mount, *temp;
712
713 if (!mounts) {
714 return;
715 }
716
717 QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) {
718 QTAILQ_REMOVE(mounts, mount, next);
719 g_free(mount->dirname);
720 g_free(mount->devtype);
721 g_free(mount);
722 }
723 }
724 #endif
725
726 #if defined(CONFIG_FSFREEZE)
727 typedef enum {
728 FSFREEZE_HOOK_THAW = 0,
729 FSFREEZE_HOOK_FREEZE,
730 } FsfreezeHookArg;
731
732 static const char *fsfreeze_hook_arg_string[] = {
733 "thaw",
734 "freeze",
735 };
736
737 static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **errp)
738 {
739 const char *hook;
740 const char *arg_str = fsfreeze_hook_arg_string[arg];
741 Error *local_err = NULL;
742
743 hook = ga_fsfreeze_hook(ga_state);
744 if (!hook) {
745 return;
746 }
747
748 const char *argv[] = {hook, arg_str, NULL};
749
750 slog("executing fsfreeze hook with arg '%s'", arg_str);
751 ga_run_command(argv, NULL, "execute fsfreeze hook", &local_err);
752 if (local_err) {
753 error_propagate(errp, local_err);
754 return;
755 }
756 }
757
758 /*
759 * Return status of freeze/thaw
760 */
761 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
762 {
763 if (ga_is_frozen(ga_state)) {
764 return GUEST_FSFREEZE_STATUS_FROZEN;
765 }
766
767 return GUEST_FSFREEZE_STATUS_THAWED;
768 }
769
770 int64_t qmp_guest_fsfreeze_freeze(Error **errp)
771 {
772 return qmp_guest_fsfreeze_freeze_list(false, NULL, errp);
773 }
774
775 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
776 strList *mountpoints,
777 Error **errp)
778 {
779 int ret;
780 FsMountList mounts;
781 Error *local_err = NULL;
782
783 slog("guest-fsfreeze called");
784
785 execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err);
786 if (local_err) {
787 error_propagate(errp, local_err);
788 return -1;
789 }
790
791 QTAILQ_INIT(&mounts);
792 if (!build_fs_mount_list(&mounts, &local_err)) {
793 error_propagate(errp, local_err);
794 return -1;
795 }
796
797 /* cannot risk guest agent blocking itself on a write in this state */
798 ga_set_frozen(ga_state);
799
800 ret = qmp_guest_fsfreeze_do_freeze_list(has_mountpoints, mountpoints,
801 mounts, errp);
802
803 free_fs_mount_list(&mounts);
804 /* We may not issue any FIFREEZE here.
805 * Just unset ga_state here and ready for the next call.
806 */
807 if (ret == 0) {
808 ga_unset_frozen(ga_state);
809 } else if (ret < 0) {
810 qmp_guest_fsfreeze_thaw(NULL);
811 }
812 return ret;
813 }
814
815 int64_t qmp_guest_fsfreeze_thaw(Error **errp)
816 {
817 int ret;
818
819 ret = qmp_guest_fsfreeze_do_thaw(errp);
820 if (ret >= 0) {
821 ga_unset_frozen(ga_state);
822 execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, errp);
823 } else {
824 ret = 0;
825 }
826
827 return ret;
828 }
829
830 static void guest_fsfreeze_cleanup(void)
831 {
832 Error *err = NULL;
833
834 if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) {
835 qmp_guest_fsfreeze_thaw(&err);
836 if (err) {
837 slog("failed to clean up frozen filesystems: %s",
838 error_get_pretty(err));
839 error_free(err);
840 }
841 }
842 }
843 #endif
844
845 /* linux-specific implementations. avoid this if at all possible. */
846 #if defined(__linux__)
847 #if defined(CONFIG_FSFREEZE)
848
849 static char *get_pci_driver(char const *syspath, int pathlen, Error **errp)
850 {
851 char *path;
852 char *dpath;
853 char *driver = NULL;
854 char buf[PATH_MAX];
855 ssize_t len;
856
857 path = g_strndup(syspath, pathlen);
858 dpath = g_strdup_printf("%s/driver", path);
859 len = readlink(dpath, buf, sizeof(buf) - 1);
860 if (len != -1) {
861 buf[len] = 0;
862 driver = g_path_get_basename(buf);
863 }
864 g_free(dpath);
865 g_free(path);
866 return driver;
867 }
868
869 static int compare_uint(const void *_a, const void *_b)
870 {
871 unsigned int a = *(unsigned int *)_a;
872 unsigned int b = *(unsigned int *)_b;
873
874 return a < b ? -1 : a > b ? 1 : 0;
875 }
876
877 /* Walk the specified sysfs and build a sorted list of host or ata numbers */
878 static int build_hosts(char const *syspath, char const *host, bool ata,
879 unsigned int *hosts, int hosts_max, Error **errp)
880 {
881 char *path;
882 DIR *dir;
883 struct dirent *entry;
884 int i = 0;
885
886 path = g_strndup(syspath, host - syspath);
887 dir = opendir(path);
888 if (!dir) {
889 error_setg_errno(errp, errno, "opendir(\"%s\")", path);
890 g_free(path);
891 return -1;
892 }
893
894 while (i < hosts_max) {
895 entry = readdir(dir);
896 if (!entry) {
897 break;
898 }
899 if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) {
900 ++i;
901 } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) {
902 ++i;
903 }
904 }
905
906 qsort(hosts, i, sizeof(hosts[0]), compare_uint);
907
908 g_free(path);
909 closedir(dir);
910 return i;
911 }
912
913 /*
914 * Store disk device info for devices on the PCI bus.
915 * Returns true if information has been stored, or false for failure.
916 */
917 static bool build_guest_fsinfo_for_pci_dev(char const *syspath,
918 GuestDiskAddress *disk,
919 Error **errp)
920 {
921 unsigned int pci[4], host, hosts[8], tgt[3];
922 int i, nhosts = 0, pcilen;
923 GuestPCIAddress *pciaddr = disk->pci_controller;
924 bool has_ata = false, has_host = false, has_tgt = false;
925 char *p, *q, *driver = NULL;
926 bool ret = false;
927
928 p = strstr(syspath, "/devices/pci");
929 if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n",
930 pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) {
931 g_debug("only pci device is supported: sysfs path '%s'", syspath);
932 return false;
933 }
934
935 p += 12 + pcilen;
936 while (true) {
937 driver = get_pci_driver(syspath, p - syspath, errp);
938 if (driver && (g_str_equal(driver, "ata_piix") ||
939 g_str_equal(driver, "sym53c8xx") ||
940 g_str_equal(driver, "virtio-pci") ||
941 g_str_equal(driver, "ahci") ||
942 g_str_equal(driver, "nvme") ||
943 g_str_equal(driver, "xhci_hcd") ||
944 g_str_equal(driver, "ehci-pci"))) {
945 break;
946 }
947
948 g_free(driver);
949 if (sscanf(p, "/%x:%x:%x.%x%n",
950 pci, pci + 1, pci + 2, pci + 3, &pcilen) == 4) {
951 p += pcilen;
952 continue;
953 }
954
955 g_debug("unsupported driver or sysfs path '%s'", syspath);
956 return false;
957 }
958
959 p = strstr(syspath, "/target");
960 if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u",
961 tgt, tgt + 1, tgt + 2) == 3) {
962 has_tgt = true;
963 }
964
965 p = strstr(syspath, "/ata");
966 if (p) {
967 q = p + 4;
968 has_ata = true;
969 } else {
970 p = strstr(syspath, "/host");
971 q = p + 5;
972 }
973 if (p && sscanf(q, "%u", &host) == 1) {
974 has_host = true;
975 nhosts = build_hosts(syspath, p, has_ata, hosts,
976 ARRAY_SIZE(hosts), errp);
977 if (nhosts < 0) {
978 goto cleanup;
979 }
980 }
981
982 pciaddr->domain = pci[0];
983 pciaddr->bus = pci[1];
984 pciaddr->slot = pci[2];
985 pciaddr->function = pci[3];
986
987 if (strcmp(driver, "ata_piix") == 0) {
988 /* a host per ide bus, target*:0:<unit>:0 */
989 if (!has_host || !has_tgt) {
990 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
991 goto cleanup;
992 }
993 for (i = 0; i < nhosts; i++) {
994 if (host == hosts[i]) {
995 disk->bus_type = GUEST_DISK_BUS_TYPE_IDE;
996 disk->bus = i;
997 disk->unit = tgt[1];
998 break;
999 }
1000 }
1001 if (i >= nhosts) {
1002 g_debug("no host for '%s' (driver '%s')", syspath, driver);
1003 goto cleanup;
1004 }
1005 } else if (strcmp(driver, "sym53c8xx") == 0) {
1006 /* scsi(LSI Logic): target*:0:<unit>:0 */
1007 if (!has_tgt) {
1008 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
1009 goto cleanup;
1010 }
1011 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
1012 disk->unit = tgt[1];
1013 } else if (strcmp(driver, "virtio-pci") == 0) {
1014 if (has_tgt) {
1015 /* virtio-scsi: target*:0:0:<unit> */
1016 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
1017 disk->unit = tgt[2];
1018 } else {
1019 /* virtio-blk: 1 disk per 1 device */
1020 disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO;
1021 }
1022 } else if (strcmp(driver, "ahci") == 0) {
1023 /* ahci: 1 host per 1 unit */
1024 if (!has_host || !has_tgt) {
1025 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
1026 goto cleanup;
1027 }
1028 for (i = 0; i < nhosts; i++) {
1029 if (host == hosts[i]) {
1030 disk->unit = i;
1031 disk->bus_type = GUEST_DISK_BUS_TYPE_SATA;
1032 break;
1033 }
1034 }
1035 if (i >= nhosts) {
1036 g_debug("no host for '%s' (driver '%s')", syspath, driver);
1037 goto cleanup;
1038 }
1039 } else if (strcmp(driver, "nvme") == 0) {
1040 disk->bus_type = GUEST_DISK_BUS_TYPE_NVME;
1041 } else if (strcmp(driver, "ehci-pci") == 0 || strcmp(driver, "xhci_hcd") == 0) {
1042 disk->bus_type = GUEST_DISK_BUS_TYPE_USB;
1043 } else {
1044 g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath);
1045 goto cleanup;
1046 }
1047
1048 ret = true;
1049
1050 cleanup:
1051 g_free(driver);
1052 return ret;
1053 }
1054
1055 /*
1056 * Store disk device info for non-PCI virtio devices (for example s390x
1057 * channel I/O devices). Returns true if information has been stored, or
1058 * false for failure.
1059 */
1060 static bool build_guest_fsinfo_for_nonpci_virtio(char const *syspath,
1061 GuestDiskAddress *disk,
1062 Error **errp)
1063 {
1064 unsigned int tgt[3];
1065 char *p;
1066
1067 if (!strstr(syspath, "/virtio") || !strstr(syspath, "/block")) {
1068 g_debug("Unsupported virtio device '%s'", syspath);
1069 return false;
1070 }
1071
1072 p = strstr(syspath, "/target");
1073 if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u",
1074 &tgt[0], &tgt[1], &tgt[2]) == 3) {
1075 /* virtio-scsi: target*:0:<target>:<unit> */
1076 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
1077 disk->bus = tgt[0];
1078 disk->target = tgt[1];
1079 disk->unit = tgt[2];
1080 } else {
1081 /* virtio-blk: 1 disk per 1 device */
1082 disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO;
1083 }
1084
1085 return true;
1086 }
1087
1088 /*
1089 * Store disk device info for CCW devices (s390x channel I/O devices).
1090 * Returns true if information has been stored, or false for failure.
1091 */
1092 static bool build_guest_fsinfo_for_ccw_dev(char const *syspath,
1093 GuestDiskAddress *disk,
1094 Error **errp)
1095 {
1096 unsigned int cssid, ssid, subchno, devno;
1097 char *p;
1098
1099 p = strstr(syspath, "/devices/css");
1100 if (!p || sscanf(p + 12, "%*x/%x.%x.%x/%*x.%*x.%x/",
1101 &cssid, &ssid, &subchno, &devno) < 4) {
1102 g_debug("could not parse ccw device sysfs path: %s", syspath);
1103 return false;
1104 }
1105
1106 disk->ccw_address = g_new0(GuestCCWAddress, 1);
1107 disk->ccw_address->cssid = cssid;
1108 disk->ccw_address->ssid = ssid;
1109 disk->ccw_address->subchno = subchno;
1110 disk->ccw_address->devno = devno;
1111
1112 if (strstr(p, "/virtio")) {
1113 build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp);
1114 }
1115
1116 return true;
1117 }
1118
1119 /* Store disk device info specified by @sysfs into @fs */
1120 static void build_guest_fsinfo_for_real_device(char const *syspath,
1121 GuestFilesystemInfo *fs,
1122 Error **errp)
1123 {
1124 GuestDiskAddress *disk;
1125 GuestPCIAddress *pciaddr;
1126 bool has_hwinf;
1127 #ifdef CONFIG_LIBUDEV
1128 struct udev *udev = NULL;
1129 struct udev_device *udevice = NULL;
1130 #endif
1131
1132 pciaddr = g_new0(GuestPCIAddress, 1);
1133 pciaddr->domain = -1; /* -1 means field is invalid */
1134 pciaddr->bus = -1;
1135 pciaddr->slot = -1;
1136 pciaddr->function = -1;
1137
1138 disk = g_new0(GuestDiskAddress, 1);
1139 disk->pci_controller = pciaddr;
1140 disk->bus_type = GUEST_DISK_BUS_TYPE_UNKNOWN;
1141
1142 #ifdef CONFIG_LIBUDEV
1143 udev = udev_new();
1144 udevice = udev_device_new_from_syspath(udev, syspath);
1145 if (udev == NULL || udevice == NULL) {
1146 g_debug("failed to query udev");
1147 } else {
1148 const char *devnode, *serial;
1149 devnode = udev_device_get_devnode(udevice);
1150 if (devnode != NULL) {
1151 disk->dev = g_strdup(devnode);
1152 }
1153 serial = udev_device_get_property_value(udevice, "ID_SERIAL");
1154 if (serial != NULL && *serial != 0) {
1155 disk->serial = g_strdup(serial);
1156 }
1157 }
1158
1159 udev_unref(udev);
1160 udev_device_unref(udevice);
1161 #endif
1162
1163 if (strstr(syspath, "/devices/pci")) {
1164 has_hwinf = build_guest_fsinfo_for_pci_dev(syspath, disk, errp);
1165 } else if (strstr(syspath, "/devices/css")) {
1166 has_hwinf = build_guest_fsinfo_for_ccw_dev(syspath, disk, errp);
1167 } else if (strstr(syspath, "/virtio")) {
1168 has_hwinf = build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp);
1169 } else {
1170 g_debug("Unsupported device type for '%s'", syspath);
1171 has_hwinf = false;
1172 }
1173
1174 if (has_hwinf || disk->dev || disk->serial) {
1175 QAPI_LIST_PREPEND(fs->disk, disk);
1176 } else {
1177 qapi_free_GuestDiskAddress(disk);
1178 }
1179 }
1180
1181 static void build_guest_fsinfo_for_device(char const *devpath,
1182 GuestFilesystemInfo *fs,
1183 Error **errp);
1184
1185 /* Store a list of slave devices of virtual volume specified by @syspath into
1186 * @fs */
1187 static void build_guest_fsinfo_for_virtual_device(char const *syspath,
1188 GuestFilesystemInfo *fs,
1189 Error **errp)
1190 {
1191 Error *err = NULL;
1192 DIR *dir;
1193 char *dirpath;
1194 struct dirent *entry;
1195
1196 dirpath = g_strdup_printf("%s/slaves", syspath);
1197 dir = opendir(dirpath);
1198 if (!dir) {
1199 if (errno != ENOENT) {
1200 error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath);
1201 }
1202 g_free(dirpath);
1203 return;
1204 }
1205
1206 for (;;) {
1207 errno = 0;
1208 entry = readdir(dir);
1209 if (entry == NULL) {
1210 if (errno) {
1211 error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath);
1212 }
1213 break;
1214 }
1215
1216 if (entry->d_type == DT_LNK) {
1217 char *path;
1218
1219 g_debug(" slave device '%s'", entry->d_name);
1220 path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name);
1221 build_guest_fsinfo_for_device(path, fs, &err);
1222 g_free(path);
1223
1224 if (err) {
1225 error_propagate(errp, err);
1226 break;
1227 }
1228 }
1229 }
1230
1231 g_free(dirpath);
1232 closedir(dir);
1233 }
1234
1235 static bool is_disk_virtual(const char *devpath, Error **errp)
1236 {
1237 g_autofree char *syspath = realpath(devpath, NULL);
1238
1239 if (!syspath) {
1240 error_setg_errno(errp, errno, "realpath(\"%s\")", devpath);
1241 return false;
1242 }
1243 return strstr(syspath, "/devices/virtual/block/") != NULL;
1244 }
1245
1246 /* Dispatch to functions for virtual/real device */
1247 static void build_guest_fsinfo_for_device(char const *devpath,
1248 GuestFilesystemInfo *fs,
1249 Error **errp)
1250 {
1251 ERRP_GUARD();
1252 g_autofree char *syspath = NULL;
1253 bool is_virtual = false;
1254
1255 syspath = realpath(devpath, NULL);
1256 if (!syspath) {
1257 if (errno != ENOENT) {
1258 error_setg_errno(errp, errno, "realpath(\"%s\")", devpath);
1259 return;
1260 }
1261
1262 /* ENOENT: This devpath may not exist because of container config */
1263 if (!fs->name) {
1264 fs->name = g_path_get_basename(devpath);
1265 }
1266 return;
1267 }
1268
1269 if (!fs->name) {
1270 fs->name = g_path_get_basename(syspath);
1271 }
1272
1273 g_debug(" parse sysfs path '%s'", syspath);
1274 is_virtual = is_disk_virtual(syspath, errp);
1275 if (*errp != NULL) {
1276 return;
1277 }
1278 if (is_virtual) {
1279 build_guest_fsinfo_for_virtual_device(syspath, fs, errp);
1280 } else {
1281 build_guest_fsinfo_for_real_device(syspath, fs, errp);
1282 }
1283 }
1284
1285 #ifdef CONFIG_LIBUDEV
1286
1287 /*
1288 * Wrapper around build_guest_fsinfo_for_device() for getting just
1289 * the disk address.
1290 */
1291 static GuestDiskAddress *get_disk_address(const char *syspath, Error **errp)
1292 {
1293 g_autoptr(GuestFilesystemInfo) fs = NULL;
1294
1295 fs = g_new0(GuestFilesystemInfo, 1);
1296 build_guest_fsinfo_for_device(syspath, fs, errp);
1297 if (fs->disk != NULL) {
1298 return g_steal_pointer(&fs->disk->value);
1299 }
1300 return NULL;
1301 }
1302
1303 static char *get_alias_for_syspath(const char *syspath)
1304 {
1305 struct udev *udev = NULL;
1306 struct udev_device *udevice = NULL;
1307 char *ret = NULL;
1308
1309 udev = udev_new();
1310 if (udev == NULL) {
1311 g_debug("failed to query udev");
1312 goto out;
1313 }
1314 udevice = udev_device_new_from_syspath(udev, syspath);
1315 if (udevice == NULL) {
1316 g_debug("failed to query udev for path: %s", syspath);
1317 goto out;
1318 } else {
1319 const char *alias = udev_device_get_property_value(
1320 udevice, "DM_NAME");
1321 /*
1322 * NULL means there was an error and empty string means there is no
1323 * alias. In case of no alias we return NULL instead of empty string.
1324 */
1325 if (alias == NULL) {
1326 g_debug("failed to query udev for device alias for: %s",
1327 syspath);
1328 } else if (*alias != 0) {
1329 ret = g_strdup(alias);
1330 }
1331 }
1332
1333 out:
1334 udev_unref(udev);
1335 udev_device_unref(udevice);
1336 return ret;
1337 }
1338
1339 static char *get_device_for_syspath(const char *syspath)
1340 {
1341 struct udev *udev = NULL;
1342 struct udev_device *udevice = NULL;
1343 char *ret = NULL;
1344
1345 udev = udev_new();
1346 if (udev == NULL) {
1347 g_debug("failed to query udev");
1348 goto out;
1349 }
1350 udevice = udev_device_new_from_syspath(udev, syspath);
1351 if (udevice == NULL) {
1352 g_debug("failed to query udev for path: %s", syspath);
1353 goto out;
1354 } else {
1355 ret = g_strdup(udev_device_get_devnode(udevice));
1356 }
1357
1358 out:
1359 udev_unref(udev);
1360 udev_device_unref(udevice);
1361 return ret;
1362 }
1363
1364 static void get_disk_deps(const char *disk_dir, GuestDiskInfo *disk)
1365 {
1366 g_autofree char *deps_dir = NULL;
1367 const gchar *dep;
1368 GDir *dp_deps = NULL;
1369
1370 /* List dependent disks */
1371 deps_dir = g_strdup_printf("%s/slaves", disk_dir);
1372 g_debug(" listing entries in: %s", deps_dir);
1373 dp_deps = g_dir_open(deps_dir, 0, NULL);
1374 if (dp_deps == NULL) {
1375 g_debug("failed to list entries in %s", deps_dir);
1376 return;
1377 }
1378 disk->has_dependencies = true;
1379 while ((dep = g_dir_read_name(dp_deps)) != NULL) {
1380 g_autofree char *dep_dir = NULL;
1381 char *dev_name;
1382
1383 /* Add dependent disks */
1384 dep_dir = g_strdup_printf("%s/%s", deps_dir, dep);
1385 dev_name = get_device_for_syspath(dep_dir);
1386 if (dev_name != NULL) {
1387 g_debug(" adding dependent device: %s", dev_name);
1388 QAPI_LIST_PREPEND(disk->dependencies, dev_name);
1389 }
1390 }
1391 g_dir_close(dp_deps);
1392 }
1393
1394 /*
1395 * Detect partitions subdirectory, name is "<disk_name><number>" or
1396 * "<disk_name>p<number>"
1397 *
1398 * @disk_name -- last component of /sys path (e.g. sda)
1399 * @disk_dir -- sys path of the disk (e.g. /sys/block/sda)
1400 * @disk_dev -- device node of the disk (e.g. /dev/sda)
1401 */
1402 static GuestDiskInfoList *get_disk_partitions(
1403 GuestDiskInfoList *list,
1404 const char *disk_name, const char *disk_dir,
1405 const char *disk_dev)
1406 {
1407 GuestDiskInfoList *ret = list;
1408 struct dirent *de_disk;
1409 DIR *dp_disk = NULL;
1410 size_t len = strlen(disk_name);
1411
1412 dp_disk = opendir(disk_dir);
1413 while ((de_disk = readdir(dp_disk)) != NULL) {
1414 g_autofree char *partition_dir = NULL;
1415 char *dev_name;
1416 GuestDiskInfo *partition;
1417
1418 if (!(de_disk->d_type & DT_DIR)) {
1419 continue;
1420 }
1421
1422 if (!(strncmp(disk_name, de_disk->d_name, len) == 0 &&
1423 ((*(de_disk->d_name + len) == 'p' &&
1424 isdigit(*(de_disk->d_name + len + 1))) ||
1425 isdigit(*(de_disk->d_name + len))))) {
1426 continue;
1427 }
1428
1429 partition_dir = g_strdup_printf("%s/%s",
1430 disk_dir, de_disk->d_name);
1431 dev_name = get_device_for_syspath(partition_dir);
1432 if (dev_name == NULL) {
1433 g_debug("Failed to get device name for syspath: %s",
1434 disk_dir);
1435 continue;
1436 }
1437 partition = g_new0(GuestDiskInfo, 1);
1438 partition->name = dev_name;
1439 partition->partition = true;
1440 partition->has_dependencies = true;
1441 /* Add parent disk as dependent for easier tracking of hierarchy */
1442 QAPI_LIST_PREPEND(partition->dependencies, g_strdup(disk_dev));
1443
1444 QAPI_LIST_PREPEND(ret, partition);
1445 }
1446 closedir(dp_disk);
1447
1448 return ret;
1449 }
1450
1451 static void get_nvme_smart(GuestDiskInfo *disk)
1452 {
1453 int fd;
1454 GuestNVMeSmart *smart;
1455 NvmeSmartLog log = {0};
1456 struct nvme_admin_cmd cmd = {
1457 .opcode = NVME_ADM_CMD_GET_LOG_PAGE,
1458 .nsid = NVME_NSID_BROADCAST,
1459 .addr = (uintptr_t)&log,
1460 .data_len = sizeof(log),
1461 .cdw10 = NVME_LOG_SMART_INFO | (1 << 15) /* RAE bit */
1462 | (((sizeof(log) >> 2) - 1) << 16)
1463 };
1464
1465 fd = qga_open_cloexec(disk->name, O_RDONLY, 0);
1466 if (fd == -1) {
1467 g_debug("Failed to open device: %s: %s", disk->name, g_strerror(errno));
1468 return;
1469 }
1470
1471 if (ioctl(fd, NVME_IOCTL_ADMIN_CMD, &cmd)) {
1472 g_debug("Failed to get smart: %s: %s", disk->name, g_strerror(errno));
1473 close(fd);
1474 return;
1475 }
1476
1477 disk->smart = g_new0(GuestDiskSmart, 1);
1478 disk->smart->type = GUEST_DISK_BUS_TYPE_NVME;
1479
1480 smart = &disk->smart->u.nvme;
1481 smart->critical_warning = log.critical_warning;
1482 smart->temperature = lduw_le_p(&log.temperature); /* unaligned field */
1483 smart->available_spare = log.available_spare;
1484 smart->available_spare_threshold = log.available_spare_threshold;
1485 smart->percentage_used = log.percentage_used;
1486 smart->data_units_read_lo = le64_to_cpu(log.data_units_read[0]);
1487 smart->data_units_read_hi = le64_to_cpu(log.data_units_read[1]);
1488 smart->data_units_written_lo = le64_to_cpu(log.data_units_written[0]);
1489 smart->data_units_written_hi = le64_to_cpu(log.data_units_written[1]);
1490 smart->host_read_commands_lo = le64_to_cpu(log.host_read_commands[0]);
1491 smart->host_read_commands_hi = le64_to_cpu(log.host_read_commands[1]);
1492 smart->host_write_commands_lo = le64_to_cpu(log.host_write_commands[0]);
1493 smart->host_write_commands_hi = le64_to_cpu(log.host_write_commands[1]);
1494 smart->controller_busy_time_lo = le64_to_cpu(log.controller_busy_time[0]);
1495 smart->controller_busy_time_hi = le64_to_cpu(log.controller_busy_time[1]);
1496 smart->power_cycles_lo = le64_to_cpu(log.power_cycles[0]);
1497 smart->power_cycles_hi = le64_to_cpu(log.power_cycles[1]);
1498 smart->power_on_hours_lo = le64_to_cpu(log.power_on_hours[0]);
1499 smart->power_on_hours_hi = le64_to_cpu(log.power_on_hours[1]);
1500 smart->unsafe_shutdowns_lo = le64_to_cpu(log.unsafe_shutdowns[0]);
1501 smart->unsafe_shutdowns_hi = le64_to_cpu(log.unsafe_shutdowns[1]);
1502 smart->media_errors_lo = le64_to_cpu(log.media_errors[0]);
1503 smart->media_errors_hi = le64_to_cpu(log.media_errors[1]);
1504 smart->number_of_error_log_entries_lo =
1505 le64_to_cpu(log.number_of_error_log_entries[0]);
1506 smart->number_of_error_log_entries_hi =
1507 le64_to_cpu(log.number_of_error_log_entries[1]);
1508
1509 close(fd);
1510 }
1511
1512 static void get_disk_smart(GuestDiskInfo *disk)
1513 {
1514 if (disk->address
1515 && (disk->address->bus_type == GUEST_DISK_BUS_TYPE_NVME)) {
1516 get_nvme_smart(disk);
1517 }
1518 }
1519
1520 GuestDiskInfoList *qmp_guest_get_disks(Error **errp)
1521 {
1522 GuestDiskInfoList *ret = NULL;
1523 GuestDiskInfo *disk;
1524 DIR *dp = NULL;
1525 struct dirent *de = NULL;
1526
1527 g_debug("listing /sys/block directory");
1528 dp = opendir("/sys/block");
1529 if (dp == NULL) {
1530 error_setg_errno(errp, errno, "Can't open directory \"/sys/block\"");
1531 return NULL;
1532 }
1533 while ((de = readdir(dp)) != NULL) {
1534 g_autofree char *disk_dir = NULL, *line = NULL,
1535 *size_path = NULL;
1536 char *dev_name;
1537 Error *local_err = NULL;
1538 if (de->d_type != DT_LNK) {
1539 g_debug(" skipping entry: %s", de->d_name);
1540 continue;
1541 }
1542
1543 /* Check size and skip zero-sized disks */
1544 g_debug(" checking disk size");
1545 size_path = g_strdup_printf("/sys/block/%s/size", de->d_name);
1546 if (!g_file_get_contents(size_path, &line, NULL, NULL)) {
1547 g_debug(" failed to read disk size");
1548 continue;
1549 }
1550 if (g_strcmp0(line, "0\n") == 0) {
1551 g_debug(" skipping zero-sized disk");
1552 continue;
1553 }
1554
1555 g_debug(" adding %s", de->d_name);
1556 disk_dir = g_strdup_printf("/sys/block/%s", de->d_name);
1557 dev_name = get_device_for_syspath(disk_dir);
1558 if (dev_name == NULL) {
1559 g_debug("Failed to get device name for syspath: %s",
1560 disk_dir);
1561 continue;
1562 }
1563 disk = g_new0(GuestDiskInfo, 1);
1564 disk->name = dev_name;
1565 disk->partition = false;
1566 disk->alias = get_alias_for_syspath(disk_dir);
1567 QAPI_LIST_PREPEND(ret, disk);
1568
1569 /* Get address for non-virtual devices */
1570 bool is_virtual = is_disk_virtual(disk_dir, &local_err);
1571 if (local_err != NULL) {
1572 g_debug(" failed to check disk path, ignoring error: %s",
1573 error_get_pretty(local_err));
1574 error_free(local_err);
1575 local_err = NULL;
1576 /* Don't try to get the address */
1577 is_virtual = true;
1578 }
1579 if (!is_virtual) {
1580 disk->address = get_disk_address(disk_dir, &local_err);
1581 if (local_err != NULL) {
1582 g_debug(" failed to get device info, ignoring error: %s",
1583 error_get_pretty(local_err));
1584 error_free(local_err);
1585 local_err = NULL;
1586 }
1587 }
1588
1589 get_disk_deps(disk_dir, disk);
1590 get_disk_smart(disk);
1591 ret = get_disk_partitions(ret, de->d_name, disk_dir, dev_name);
1592 }
1593
1594 closedir(dp);
1595
1596 return ret;
1597 }
1598
1599 #else
1600
1601 GuestDiskInfoList *qmp_guest_get_disks(Error **errp)
1602 {
1603 error_setg(errp, QERR_UNSUPPORTED);
1604 return NULL;
1605 }
1606
1607 #endif
1608
1609 /* Return a list of the disk device(s)' info which @mount lies on */
1610 static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount,
1611 Error **errp)
1612 {
1613 GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs));
1614 struct statvfs buf;
1615 unsigned long used, nonroot_total, fr_size;
1616 char *devpath = g_strdup_printf("/sys/dev/block/%u:%u",
1617 mount->devmajor, mount->devminor);
1618
1619 fs->mountpoint = g_strdup(mount->dirname);
1620 fs->type = g_strdup(mount->devtype);
1621 build_guest_fsinfo_for_device(devpath, fs, errp);
1622
1623 if (statvfs(fs->mountpoint, &buf) == 0) {
1624 fr_size = buf.f_frsize;
1625 used = buf.f_blocks - buf.f_bfree;
1626 nonroot_total = used + buf.f_bavail;
1627 fs->used_bytes = used * fr_size;
1628 fs->total_bytes = nonroot_total * fr_size;
1629 fs->total_bytes_privileged = buf.f_blocks * fr_size;
1630
1631 fs->has_total_bytes = true;
1632 fs->has_total_bytes_privileged = true;
1633 fs->has_used_bytes = true;
1634 }
1635
1636 g_free(devpath);
1637
1638 return fs;
1639 }
1640
1641 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
1642 {
1643 FsMountList mounts;
1644 struct FsMount *mount;
1645 GuestFilesystemInfoList *ret = NULL;
1646 Error *local_err = NULL;
1647
1648 QTAILQ_INIT(&mounts);
1649 if (!build_fs_mount_list(&mounts, &local_err)) {
1650 error_propagate(errp, local_err);
1651 return NULL;
1652 }
1653
1654 QTAILQ_FOREACH(mount, &mounts, next) {
1655 g_debug("Building guest fsinfo for '%s'", mount->dirname);
1656
1657 QAPI_LIST_PREPEND(ret, build_guest_fsinfo(mount, &local_err));
1658 if (local_err) {
1659 error_propagate(errp, local_err);
1660 qapi_free_GuestFilesystemInfoList(ret);
1661 ret = NULL;
1662 break;
1663 }
1664 }
1665
1666 free_fs_mount_list(&mounts);
1667 return ret;
1668 }
1669 #endif /* CONFIG_FSFREEZE */
1670
1671 #if defined(CONFIG_FSTRIM)
1672 /*
1673 * Walk list of mounted file systems in the guest, and trim them.
1674 */
1675 GuestFilesystemTrimResponse *
1676 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
1677 {
1678 GuestFilesystemTrimResponse *response;
1679 GuestFilesystemTrimResult *result;
1680 int ret = 0;
1681 FsMountList mounts;
1682 struct FsMount *mount;
1683 int fd;
1684 struct fstrim_range r;
1685
1686 slog("guest-fstrim called");
1687
1688 QTAILQ_INIT(&mounts);
1689 if (!build_fs_mount_list(&mounts, errp)) {
1690 return NULL;
1691 }
1692
1693 response = g_malloc0(sizeof(*response));
1694
1695 QTAILQ_FOREACH(mount, &mounts, next) {
1696 result = g_malloc0(sizeof(*result));
1697 result->path = g_strdup(mount->dirname);
1698
1699 QAPI_LIST_PREPEND(response->paths, result);
1700
1701 fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0);
1702 if (fd == -1) {
1703 result->error = g_strdup_printf("failed to open: %s",
1704 strerror(errno));
1705 continue;
1706 }
1707
1708 /* We try to cull filesystems we know won't work in advance, but other
1709 * filesystems may not implement fstrim for less obvious reasons.
1710 * These will report EOPNOTSUPP; while in some other cases ENOTTY
1711 * will be reported (e.g. CD-ROMs).
1712 * Any other error means an unexpected error.
1713 */
1714 r.start = 0;
1715 r.len = -1;
1716 r.minlen = has_minimum ? minimum : 0;
1717 ret = ioctl(fd, FITRIM, &r);
1718 if (ret == -1) {
1719 if (errno == ENOTTY || errno == EOPNOTSUPP) {
1720 result->error = g_strdup("trim not supported");
1721 } else {
1722 result->error = g_strdup_printf("failed to trim: %s",
1723 strerror(errno));
1724 }
1725 close(fd);
1726 continue;
1727 }
1728
1729 result->has_minimum = true;
1730 result->minimum = r.minlen;
1731 result->has_trimmed = true;
1732 result->trimmed = r.len;
1733 close(fd);
1734 }
1735
1736 free_fs_mount_list(&mounts);
1737 return response;
1738 }
1739 #endif /* CONFIG_FSTRIM */
1740
1741
1742 #define LINUX_SYS_STATE_FILE "/sys/power/state"
1743 #define SUSPEND_SUPPORTED 0
1744 #define SUSPEND_NOT_SUPPORTED 1
1745
1746 typedef enum {
1747 SUSPEND_MODE_DISK = 0,
1748 SUSPEND_MODE_RAM = 1,
1749 SUSPEND_MODE_HYBRID = 2,
1750 } SuspendMode;
1751
1752 /*
1753 * Executes a command in a child process using g_spawn_sync,
1754 * returning an int >= 0 representing the exit status of the
1755 * process.
1756 *
1757 * If the program wasn't found in path, returns -1.
1758 *
1759 * If a problem happened when creating the child process,
1760 * returns -1 and errp is set.
1761 */
1762 static int run_process_child(const char *command[], Error **errp)
1763 {
1764 int exit_status, spawn_flag;
1765 GError *g_err = NULL;
1766 bool success;
1767
1768 spawn_flag = G_SPAWN_SEARCH_PATH | G_SPAWN_STDOUT_TO_DEV_NULL |
1769 G_SPAWN_STDERR_TO_DEV_NULL;
1770
1771 success = g_spawn_sync(NULL, (char **)command, NULL, spawn_flag,
1772 NULL, NULL, NULL, NULL,
1773 &exit_status, &g_err);
1774
1775 if (success) {
1776 return WEXITSTATUS(exit_status);
1777 }
1778
1779 if (g_err && (g_err->code != G_SPAWN_ERROR_NOENT)) {
1780 error_setg(errp, "failed to create child process, error '%s'",
1781 g_err->message);
1782 }
1783
1784 g_error_free(g_err);
1785 return -1;
1786 }
1787
1788 static bool systemd_supports_mode(SuspendMode mode, Error **errp)
1789 {
1790 const char *systemctl_args[3] = {"systemd-hibernate", "systemd-suspend",
1791 "systemd-hybrid-sleep"};
1792 const char *cmd[4] = {"systemctl", "status", systemctl_args[mode], NULL};
1793 int status;
1794
1795 status = run_process_child(cmd, errp);
1796
1797 /*
1798 * systemctl status uses LSB return codes so we can expect
1799 * status > 0 and be ok. To assert if the guest has support
1800 * for the selected suspend mode, status should be < 4. 4 is
1801 * the code for unknown service status, the return value when
1802 * the service does not exist. A common value is status = 3
1803 * (program is not running).
1804 */
1805 if (status > 0 && status < 4) {
1806 return true;
1807 }
1808
1809 return false;
1810 }
1811
1812 static void systemd_suspend(SuspendMode mode, Error **errp)
1813 {
1814 Error *local_err = NULL;
1815 const char *systemctl_args[3] = {"hibernate", "suspend", "hybrid-sleep"};
1816 const char *cmd[3] = {"systemctl", systemctl_args[mode], NULL};
1817 int status;
1818
1819 status = run_process_child(cmd, &local_err);
1820
1821 if (status == 0) {
1822 return;
1823 }
1824
1825 if ((status == -1) && !local_err) {
1826 error_setg(errp, "the helper program 'systemctl %s' was not found",
1827 systemctl_args[mode]);
1828 return;
1829 }
1830
1831 if (local_err) {
1832 error_propagate(errp, local_err);
1833 } else {
1834 error_setg(errp, "the helper program 'systemctl %s' returned an "
1835 "unexpected exit status code (%d)",
1836 systemctl_args[mode], status);
1837 }
1838 }
1839
1840 static bool pmutils_supports_mode(SuspendMode mode, Error **errp)
1841 {
1842 Error *local_err = NULL;
1843 const char *pmutils_args[3] = {"--hibernate", "--suspend",
1844 "--suspend-hybrid"};
1845 const char *cmd[3] = {"pm-is-supported", pmutils_args[mode], NULL};
1846 int status;
1847
1848 status = run_process_child(cmd, &local_err);
1849
1850 if (status == SUSPEND_SUPPORTED) {
1851 return true;
1852 }
1853
1854 if ((status == -1) && !local_err) {
1855 return false;
1856 }
1857
1858 if (local_err) {
1859 error_propagate(errp, local_err);
1860 } else {
1861 error_setg(errp,
1862 "the helper program '%s' returned an unexpected exit"
1863 " status code (%d)", "pm-is-supported", status);
1864 }
1865
1866 return false;
1867 }
1868
1869 static void pmutils_suspend(SuspendMode mode, Error **errp)
1870 {
1871 Error *local_err = NULL;
1872 const char *pmutils_binaries[3] = {"pm-hibernate", "pm-suspend",
1873 "pm-suspend-hybrid"};
1874 const char *cmd[2] = {pmutils_binaries[mode], NULL};
1875 int status;
1876
1877 status = run_process_child(cmd, &local_err);
1878
1879 if (status == 0) {
1880 return;
1881 }
1882
1883 if ((status == -1) && !local_err) {
1884 error_setg(errp, "the helper program '%s' was not found",
1885 pmutils_binaries[mode]);
1886 return;
1887 }
1888
1889 if (local_err) {
1890 error_propagate(errp, local_err);
1891 } else {
1892 error_setg(errp,
1893 "the helper program '%s' returned an unexpected exit"
1894 " status code (%d)", pmutils_binaries[mode], status);
1895 }
1896 }
1897
1898 static bool linux_sys_state_supports_mode(SuspendMode mode, Error **errp)
1899 {
1900 const char *sysfile_strs[3] = {"disk", "mem", NULL};
1901 const char *sysfile_str = sysfile_strs[mode];
1902 char buf[32]; /* hopefully big enough */
1903 int fd;
1904 ssize_t ret;
1905
1906 if (!sysfile_str) {
1907 error_setg(errp, "unknown guest suspend mode");
1908 return false;
1909 }
1910
1911 fd = open(LINUX_SYS_STATE_FILE, O_RDONLY);
1912 if (fd < 0) {
1913 return false;
1914 }
1915
1916 ret = read(fd, buf, sizeof(buf) - 1);
1917 close(fd);
1918 if (ret <= 0) {
1919 return false;
1920 }
1921 buf[ret] = '\0';
1922
1923 if (strstr(buf, sysfile_str)) {
1924 return true;
1925 }
1926 return false;
1927 }
1928
1929 static void linux_sys_state_suspend(SuspendMode mode, Error **errp)
1930 {
1931 g_autoptr(GError) local_gerr = NULL;
1932 const char *sysfile_strs[3] = {"disk", "mem", NULL};
1933 const char *sysfile_str = sysfile_strs[mode];
1934
1935 if (!sysfile_str) {
1936 error_setg(errp, "unknown guest suspend mode");
1937 return;
1938 }
1939
1940 if (!g_file_set_contents(LINUX_SYS_STATE_FILE, sysfile_str,
1941 -1, &local_gerr)) {
1942 error_setg(errp, "suspend: cannot write to '%s': %s",
1943 LINUX_SYS_STATE_FILE, local_gerr->message);
1944 return;
1945 }
1946 }
1947
1948 static void guest_suspend(SuspendMode mode, Error **errp)
1949 {
1950 Error *local_err = NULL;
1951 bool mode_supported = false;
1952
1953 if (systemd_supports_mode(mode, &local_err)) {
1954 mode_supported = true;
1955 systemd_suspend(mode, &local_err);
1956
1957 if (!local_err) {
1958 return;
1959 }
1960 }
1961
1962 error_free(local_err);
1963 local_err = NULL;
1964
1965 if (pmutils_supports_mode(mode, &local_err)) {
1966 mode_supported = true;
1967 pmutils_suspend(mode, &local_err);
1968
1969 if (!local_err) {
1970 return;
1971 }
1972 }
1973
1974 error_free(local_err);
1975 local_err = NULL;
1976
1977 if (linux_sys_state_supports_mode(mode, &local_err)) {
1978 mode_supported = true;
1979 linux_sys_state_suspend(mode, &local_err);
1980 }
1981
1982 if (!mode_supported) {
1983 error_free(local_err);
1984 error_setg(errp,
1985 "the requested suspend mode is not supported by the guest");
1986 } else {
1987 error_propagate(errp, local_err);
1988 }
1989 }
1990
1991 void qmp_guest_suspend_disk(Error **errp)
1992 {
1993 guest_suspend(SUSPEND_MODE_DISK, errp);
1994 }
1995
1996 void qmp_guest_suspend_ram(Error **errp)
1997 {
1998 guest_suspend(SUSPEND_MODE_RAM, errp);
1999 }
2000
2001 void qmp_guest_suspend_hybrid(Error **errp)
2002 {
2003 guest_suspend(SUSPEND_MODE_HYBRID, errp);
2004 }
2005
2006 /* Transfer online/offline status between @vcpu and the guest system.
2007 *
2008 * On input either @errp or *@errp must be NULL.
2009 *
2010 * In system-to-@vcpu direction, the following @vcpu fields are accessed:
2011 * - R: vcpu->logical_id
2012 * - W: vcpu->online
2013 * - W: vcpu->can_offline
2014 *
2015 * In @vcpu-to-system direction, the following @vcpu fields are accessed:
2016 * - R: vcpu->logical_id
2017 * - R: vcpu->online
2018 *
2019 * Written members remain unmodified on error.
2020 */
2021 static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu,
2022 char *dirpath, Error **errp)
2023 {
2024 int fd;
2025 int res;
2026 int dirfd;
2027 static const char fn[] = "online";
2028
2029 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2030 if (dirfd == -1) {
2031 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2032 return;
2033 }
2034
2035 fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR);
2036 if (fd == -1) {
2037 if (errno != ENOENT) {
2038 error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn);
2039 } else if (sys2vcpu) {
2040 vcpu->online = true;
2041 vcpu->can_offline = false;
2042 } else if (!vcpu->online) {
2043 error_setg(errp, "logical processor #%" PRId64 " can't be "
2044 "offlined", vcpu->logical_id);
2045 } /* otherwise pretend successful re-onlining */
2046 } else {
2047 unsigned char status;
2048
2049 res = pread(fd, &status, 1, 0);
2050 if (res == -1) {
2051 error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn);
2052 } else if (res == 0) {
2053 error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath,
2054 fn);
2055 } else if (sys2vcpu) {
2056 vcpu->online = (status != '0');
2057 vcpu->can_offline = true;
2058 } else if (vcpu->online != (status != '0')) {
2059 status = '0' + vcpu->online;
2060 if (pwrite(fd, &status, 1, 0) == -1) {
2061 error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath,
2062 fn);
2063 }
2064 } /* otherwise pretend successful re-(on|off)-lining */
2065
2066 res = close(fd);
2067 g_assert(res == 0);
2068 }
2069
2070 res = close(dirfd);
2071 g_assert(res == 0);
2072 }
2073
2074 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
2075 {
2076 GuestLogicalProcessorList *head, **tail;
2077 const char *cpu_dir = "/sys/devices/system/cpu";
2078 const gchar *line;
2079 g_autoptr(GDir) cpu_gdir = NULL;
2080 Error *local_err = NULL;
2081
2082 head = NULL;
2083 tail = &head;
2084 cpu_gdir = g_dir_open(cpu_dir, 0, NULL);
2085
2086 if (cpu_gdir == NULL) {
2087 error_setg_errno(errp, errno, "failed to list entries: %s", cpu_dir);
2088 return NULL;
2089 }
2090
2091 while (local_err == NULL && (line = g_dir_read_name(cpu_gdir)) != NULL) {
2092 GuestLogicalProcessor *vcpu;
2093 int64_t id;
2094 if (sscanf(line, "cpu%" PRId64, &id)) {
2095 g_autofree char *path = g_strdup_printf("/sys/devices/system/cpu/"
2096 "cpu%" PRId64 "/", id);
2097 vcpu = g_malloc0(sizeof *vcpu);
2098 vcpu->logical_id = id;
2099 vcpu->has_can_offline = true; /* lolspeak ftw */
2100 transfer_vcpu(vcpu, true, path, &local_err);
2101 QAPI_LIST_APPEND(tail, vcpu);
2102 }
2103 }
2104
2105 if (local_err == NULL) {
2106 /* there's no guest with zero VCPUs */
2107 g_assert(head != NULL);
2108 return head;
2109 }
2110
2111 qapi_free_GuestLogicalProcessorList(head);
2112 error_propagate(errp, local_err);
2113 return NULL;
2114 }
2115
2116 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
2117 {
2118 int64_t processed;
2119 Error *local_err = NULL;
2120
2121 processed = 0;
2122 while (vcpus != NULL) {
2123 char *path = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/",
2124 vcpus->value->logical_id);
2125
2126 transfer_vcpu(vcpus->value, false, path, &local_err);
2127 g_free(path);
2128 if (local_err != NULL) {
2129 break;
2130 }
2131 ++processed;
2132 vcpus = vcpus->next;
2133 }
2134
2135 if (local_err != NULL) {
2136 if (processed == 0) {
2137 error_propagate(errp, local_err);
2138 } else {
2139 error_free(local_err);
2140 }
2141 }
2142
2143 return processed;
2144 }
2145 #endif /* __linux__ */
2146
2147 #if defined(__linux__) || defined(__FreeBSD__)
2148 void qmp_guest_set_user_password(const char *username,
2149 const char *password,
2150 bool crypted,
2151 Error **errp)
2152 {
2153 Error *local_err = NULL;
2154 g_autofree char *rawpasswddata = NULL;
2155 size_t rawpasswdlen;
2156
2157 rawpasswddata = (char *)qbase64_decode(password, -1, &rawpasswdlen, errp);
2158 if (!rawpasswddata) {
2159 return;
2160 }
2161 rawpasswddata = g_renew(char, rawpasswddata, rawpasswdlen + 1);
2162 rawpasswddata[rawpasswdlen] = '\0';
2163
2164 if (strchr(rawpasswddata, '\n')) {
2165 error_setg(errp, "forbidden characters in raw password");
2166 return;
2167 }
2168
2169 if (strchr(username, '\n') ||
2170 strchr(username, ':')) {
2171 error_setg(errp, "forbidden characters in username");
2172 return;
2173 }
2174
2175 #ifdef __FreeBSD__
2176 g_autofree char *chpasswdata = g_strdup(rawpasswddata);
2177 const char *crypt_flag = crypted ? "-H" : "-h";
2178 const char *argv[] = {"pw", "usermod", "-n", username,
2179 crypt_flag, "0", NULL};
2180 #else
2181 g_autofree char *chpasswddata = g_strdup_printf("%s:%s\n", username,
2182 rawpasswddata);
2183 const char *crypt_flag = crypted ? "-e" : NULL;
2184 const char *argv[] = {"chpasswd", crypt_flag, NULL};
2185 #endif
2186
2187 ga_run_command(argv, chpasswddata, "set user password", &local_err);
2188 if (local_err) {
2189 error_propagate(errp, local_err);
2190 return;
2191 }
2192 }
2193 #else /* __linux__ || __FreeBSD__ */
2194 void qmp_guest_set_user_password(const char *username,
2195 const char *password,
2196 bool crypted,
2197 Error **errp)
2198 {
2199 error_setg(errp, QERR_UNSUPPORTED);
2200 }
2201 #endif /* __linux__ || __FreeBSD__ */
2202
2203 #ifdef __linux__
2204 static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf,
2205 int size, Error **errp)
2206 {
2207 int fd;
2208 int res;
2209
2210 errno = 0;
2211 fd = openat(dirfd, pathname, O_RDONLY);
2212 if (fd == -1) {
2213 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname);
2214 return;
2215 }
2216
2217 res = pread(fd, buf, size, 0);
2218 if (res == -1) {
2219 error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname);
2220 } else if (res == 0) {
2221 error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname);
2222 }
2223 close(fd);
2224 }
2225
2226 static void ga_write_sysfs_file(int dirfd, const char *pathname,
2227 const char *buf, int size, Error **errp)
2228 {
2229 int fd;
2230
2231 errno = 0;
2232 fd = openat(dirfd, pathname, O_WRONLY);
2233 if (fd == -1) {
2234 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname);
2235 return;
2236 }
2237
2238 if (pwrite(fd, buf, size, 0) == -1) {
2239 error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname);
2240 }
2241
2242 close(fd);
2243 }
2244
2245 /* Transfer online/offline status between @mem_blk and the guest system.
2246 *
2247 * On input either @errp or *@errp must be NULL.
2248 *
2249 * In system-to-@mem_blk direction, the following @mem_blk fields are accessed:
2250 * - R: mem_blk->phys_index
2251 * - W: mem_blk->online
2252 * - W: mem_blk->can_offline
2253 *
2254 * In @mem_blk-to-system direction, the following @mem_blk fields are accessed:
2255 * - R: mem_blk->phys_index
2256 * - R: mem_blk->online
2257 *- R: mem_blk->can_offline
2258 * Written members remain unmodified on error.
2259 */
2260 static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk,
2261 GuestMemoryBlockResponse *result,
2262 Error **errp)
2263 {
2264 char *dirpath;
2265 int dirfd;
2266 char *status;
2267 Error *local_err = NULL;
2268
2269 if (!sys2memblk) {
2270 DIR *dp;
2271
2272 if (!result) {
2273 error_setg(errp, "Internal error, 'result' should not be NULL");
2274 return;
2275 }
2276 errno = 0;
2277 dp = opendir("/sys/devices/system/memory/");
2278 /* if there is no 'memory' directory in sysfs,
2279 * we think this VM does not support online/offline memory block,
2280 * any other solution?
2281 */
2282 if (!dp) {
2283 if (errno == ENOENT) {
2284 result->response =
2285 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED;
2286 }
2287 goto out1;
2288 }
2289 closedir(dp);
2290 }
2291
2292 dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/",
2293 mem_blk->phys_index);
2294 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2295 if (dirfd == -1) {
2296 if (sys2memblk) {
2297 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2298 } else {
2299 if (errno == ENOENT) {
2300 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND;
2301 } else {
2302 result->response =
2303 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2304 }
2305 }
2306 g_free(dirpath);
2307 goto out1;
2308 }
2309 g_free(dirpath);
2310
2311 status = g_malloc0(10);
2312 ga_read_sysfs_file(dirfd, "state", status, 10, &local_err);
2313 if (local_err) {
2314 /* treat with sysfs file that not exist in old kernel */
2315 if (errno == ENOENT) {
2316 error_free(local_err);
2317 if (sys2memblk) {
2318 mem_blk->online = true;
2319 mem_blk->can_offline = false;
2320 } else if (!mem_blk->online) {
2321 result->response =
2322 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED;
2323 }
2324 } else {
2325 if (sys2memblk) {
2326 error_propagate(errp, local_err);
2327 } else {
2328 error_free(local_err);
2329 result->response =
2330 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2331 }
2332 }
2333 goto out2;
2334 }
2335
2336 if (sys2memblk) {
2337 char removable = '0';
2338
2339 mem_blk->online = (strncmp(status, "online", 6) == 0);
2340
2341 ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err);
2342 if (local_err) {
2343 /* if no 'removable' file, it doesn't support offline mem blk */
2344 if (errno == ENOENT) {
2345 error_free(local_err);
2346 mem_blk->can_offline = false;
2347 } else {
2348 error_propagate(errp, local_err);
2349 }
2350 } else {
2351 mem_blk->can_offline = (removable != '0');
2352 }
2353 } else {
2354 if (mem_blk->online != (strncmp(status, "online", 6) == 0)) {
2355 const char *new_state = mem_blk->online ? "online" : "offline";
2356
2357 ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state),
2358 &local_err);
2359 if (local_err) {
2360 error_free(local_err);
2361 result->response =
2362 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2363 goto out2;
2364 }
2365
2366 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS;
2367 result->has_error_code = false;
2368 } /* otherwise pretend successful re-(on|off)-lining */
2369 }
2370 g_free(status);
2371 close(dirfd);
2372 return;
2373
2374 out2:
2375 g_free(status);
2376 close(dirfd);
2377 out1:
2378 if (!sys2memblk) {
2379 result->has_error_code = true;
2380 result->error_code = errno;
2381 }
2382 }
2383
2384 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp)
2385 {
2386 GuestMemoryBlockList *head, **tail;
2387 Error *local_err = NULL;
2388 struct dirent *de;
2389 DIR *dp;
2390
2391 head = NULL;
2392 tail = &head;
2393
2394 dp = opendir("/sys/devices/system/memory/");
2395 if (!dp) {
2396 /* it's ok if this happens to be a system that doesn't expose
2397 * memory blocks via sysfs, but otherwise we should report
2398 * an error
2399 */
2400 if (errno != ENOENT) {
2401 error_setg_errno(errp, errno, "Can't open directory"
2402 "\"/sys/devices/system/memory/\"");
2403 }
2404 return NULL;
2405 }
2406
2407 /* Note: the phys_index of memory block may be discontinuous,
2408 * this is because a memblk is the unit of the Sparse Memory design, which
2409 * allows discontinuous memory ranges (ex. NUMA), so here we should
2410 * traverse the memory block directory.
2411 */
2412 while ((de = readdir(dp)) != NULL) {
2413 GuestMemoryBlock *mem_blk;
2414
2415 if ((strncmp(de->d_name, "memory", 6) != 0) ||
2416 !(de->d_type & DT_DIR)) {
2417 continue;
2418 }
2419
2420 mem_blk = g_malloc0(sizeof *mem_blk);
2421 /* The d_name is "memoryXXX", phys_index is block id, same as XXX */
2422 mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10);
2423 mem_blk->has_can_offline = true; /* lolspeak ftw */
2424 transfer_memory_block(mem_blk, true, NULL, &local_err);
2425 if (local_err) {
2426 break;
2427 }
2428
2429 QAPI_LIST_APPEND(tail, mem_blk);
2430 }
2431
2432 closedir(dp);
2433 if (local_err == NULL) {
2434 /* there's no guest with zero memory blocks */
2435 if (head == NULL) {
2436 error_setg(errp, "guest reported zero memory blocks!");
2437 }
2438 return head;
2439 }
2440
2441 qapi_free_GuestMemoryBlockList(head);
2442 error_propagate(errp, local_err);
2443 return NULL;
2444 }
2445
2446 GuestMemoryBlockResponseList *
2447 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp)
2448 {
2449 GuestMemoryBlockResponseList *head, **tail;
2450 Error *local_err = NULL;
2451
2452 head = NULL;
2453 tail = &head;
2454
2455 while (mem_blks != NULL) {
2456 GuestMemoryBlockResponse *result;
2457 GuestMemoryBlock *current_mem_blk = mem_blks->value;
2458
2459 result = g_malloc0(sizeof(*result));
2460 result->phys_index = current_mem_blk->phys_index;
2461 transfer_memory_block(current_mem_blk, false, result, &local_err);
2462 if (local_err) { /* should never happen */
2463 goto err;
2464 }
2465
2466 QAPI_LIST_APPEND(tail, result);
2467 mem_blks = mem_blks->next;
2468 }
2469
2470 return head;
2471 err:
2472 qapi_free_GuestMemoryBlockResponseList(head);
2473 error_propagate(errp, local_err);
2474 return NULL;
2475 }
2476
2477 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp)
2478 {
2479 Error *local_err = NULL;
2480 char *dirpath;
2481 int dirfd;
2482 char *buf;
2483 GuestMemoryBlockInfo *info;
2484
2485 dirpath = g_strdup_printf("/sys/devices/system/memory/");
2486 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2487 if (dirfd == -1) {
2488 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2489 g_free(dirpath);
2490 return NULL;
2491 }
2492 g_free(dirpath);
2493
2494 buf = g_malloc0(20);
2495 ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err);
2496 close(dirfd);
2497 if (local_err) {
2498 g_free(buf);
2499 error_propagate(errp, local_err);
2500 return NULL;
2501 }
2502
2503 info = g_new0(GuestMemoryBlockInfo, 1);
2504 info->size = strtol(buf, NULL, 16); /* the unit is bytes */
2505
2506 g_free(buf);
2507
2508 return info;
2509 }
2510
2511 #define MAX_NAME_LEN 128
2512 static GuestDiskStatsInfoList *guest_get_diskstats(Error **errp)
2513 {
2514 #ifdef CONFIG_LINUX
2515 GuestDiskStatsInfoList *head = NULL, **tail = &head;
2516 const char *diskstats = "/proc/diskstats";
2517 FILE *fp;
2518 size_t n;
2519 char *line = NULL;
2520
2521 fp = fopen(diskstats, "r");
2522 if (fp == NULL) {
2523 error_setg_errno(errp, errno, "open(\"%s\")", diskstats);
2524 return NULL;
2525 }
2526
2527 while (getline(&line, &n, fp) != -1) {
2528 g_autofree GuestDiskStatsInfo *diskstatinfo = NULL;
2529 g_autofree GuestDiskStats *diskstat = NULL;
2530 char dev_name[MAX_NAME_LEN];
2531 unsigned int ios_pgr, tot_ticks, rq_ticks, wr_ticks, dc_ticks, fl_ticks;
2532 unsigned long rd_ios, rd_merges_or_rd_sec, rd_ticks_or_wr_sec, wr_ios;
2533 unsigned long wr_merges, rd_sec_or_wr_ios, wr_sec;
2534 unsigned long dc_ios, dc_merges, dc_sec, fl_ios;
2535 unsigned int major, minor;
2536 int i;
2537
2538 i = sscanf(line, "%u %u %s %lu %lu %lu"
2539 "%lu %lu %lu %lu %u %u %u %u"
2540 "%lu %lu %lu %u %lu %u",
2541 &major, &minor, dev_name,
2542 &rd_ios, &rd_merges_or_rd_sec, &rd_sec_or_wr_ios,
2543 &rd_ticks_or_wr_sec, &wr_ios, &wr_merges, &wr_sec,
2544 &wr_ticks, &ios_pgr, &tot_ticks, &rq_ticks,
2545 &dc_ios, &dc_merges, &dc_sec, &dc_ticks,
2546 &fl_ios, &fl_ticks);
2547
2548 if (i < 7) {
2549 continue;
2550 }
2551
2552 diskstatinfo = g_new0(GuestDiskStatsInfo, 1);
2553 diskstatinfo->name = g_strdup(dev_name);
2554 diskstatinfo->major = major;
2555 diskstatinfo->minor = minor;
2556
2557 diskstat = g_new0(GuestDiskStats, 1);
2558 if (i == 7) {
2559 diskstat->has_read_ios = true;
2560 diskstat->read_ios = rd_ios;
2561 diskstat->has_read_sectors = true;
2562 diskstat->read_sectors = rd_merges_or_rd_sec;
2563 diskstat->has_write_ios = true;
2564 diskstat->write_ios = rd_sec_or_wr_ios;
2565 diskstat->has_write_sectors = true;
2566 diskstat->write_sectors = rd_ticks_or_wr_sec;
2567 }
2568 if (i >= 14) {
2569 diskstat->has_read_ios = true;
2570 diskstat->read_ios = rd_ios;
2571 diskstat->has_read_sectors = true;
2572 diskstat->read_sectors = rd_sec_or_wr_ios;
2573 diskstat->has_read_merges = true;
2574 diskstat->read_merges = rd_merges_or_rd_sec;
2575 diskstat->has_read_ticks = true;
2576 diskstat->read_ticks = rd_ticks_or_wr_sec;
2577 diskstat->has_write_ios = true;
2578 diskstat->write_ios = wr_ios;
2579 diskstat->has_write_sectors = true;
2580 diskstat->write_sectors = wr_sec;
2581 diskstat->has_write_merges = true;
2582 diskstat->write_merges = wr_merges;
2583 diskstat->has_write_ticks = true;
2584 diskstat->write_ticks = wr_ticks;
2585 diskstat->has_ios_pgr = true;
2586 diskstat->ios_pgr = ios_pgr;
2587 diskstat->has_total_ticks = true;
2588 diskstat->total_ticks = tot_ticks;
2589 diskstat->has_weight_ticks = true;
2590 diskstat->weight_ticks = rq_ticks;
2591 }
2592 if (i >= 18) {
2593 diskstat->has_discard_ios = true;
2594 diskstat->discard_ios = dc_ios;
2595 diskstat->has_discard_merges = true;
2596 diskstat->discard_merges = dc_merges;
2597 diskstat->has_discard_sectors = true;
2598 diskstat->discard_sectors = dc_sec;
2599 diskstat->has_discard_ticks = true;
2600 diskstat->discard_ticks = dc_ticks;
2601 }
2602 if (i >= 20) {
2603 diskstat->has_flush_ios = true;
2604 diskstat->flush_ios = fl_ios;
2605 diskstat->has_flush_ticks = true;
2606 diskstat->flush_ticks = fl_ticks;
2607 }
2608
2609 diskstatinfo->stats = g_steal_pointer(&diskstat);
2610 QAPI_LIST_APPEND(tail, diskstatinfo);
2611 diskstatinfo = NULL;
2612 }
2613 free(line);
2614 fclose(fp);
2615 return head;
2616 #else
2617 g_debug("disk stats reporting available only for Linux");
2618 return NULL;
2619 #endif
2620 }
2621
2622 GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp)
2623 {
2624 return guest_get_diskstats(errp);
2625 }
2626
2627 GuestCpuStatsList *qmp_guest_get_cpustats(Error **errp)
2628 {
2629 GuestCpuStatsList *head = NULL, **tail = &head;
2630 const char *cpustats = "/proc/stat";
2631 int clk_tck = sysconf(_SC_CLK_TCK);
2632 FILE *fp;
2633 size_t n;
2634 char *line = NULL;
2635
2636 fp = fopen(cpustats, "r");
2637 if (fp == NULL) {
2638 error_setg_errno(errp, errno, "open(\"%s\")", cpustats);
2639 return NULL;
2640 }
2641
2642 while (getline(&line, &n, fp) != -1) {
2643 GuestCpuStats *cpustat = NULL;
2644 GuestLinuxCpuStats *linuxcpustat;
2645 int i;
2646 unsigned long user, system, idle, iowait, irq, softirq, steal, guest;
2647 unsigned long nice, guest_nice;
2648 char name[64];
2649
2650 i = sscanf(line, "%s %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu",
2651 name, &user, &nice, &system, &idle, &iowait, &irq, &softirq,
2652 &steal, &guest, &guest_nice);
2653
2654 /* drop "cpu 1 2 3 ...", get "cpuX 1 2 3 ..." only */
2655 if ((i == EOF) || strncmp(name, "cpu", 3) || (name[3] == '\0')) {
2656 continue;
2657 }
2658
2659 if (i < 5) {
2660 slog("Parsing cpu stat from %s failed, see \"man proc\"", cpustats);
2661 break;
2662 }
2663
2664 cpustat = g_new0(GuestCpuStats, 1);
2665 cpustat->type = GUEST_CPU_STATS_TYPE_LINUX;
2666
2667 linuxcpustat = &cpustat->u.q_linux;
2668 linuxcpustat->cpu = atoi(&name[3]);
2669 linuxcpustat->user = user * 1000 / clk_tck;
2670 linuxcpustat->nice = nice * 1000 / clk_tck;
2671 linuxcpustat->system = system * 1000 / clk_tck;
2672 linuxcpustat->idle = idle * 1000 / clk_tck;
2673
2674 if (i > 5) {
2675 linuxcpustat->has_iowait = true;
2676 linuxcpustat->iowait = iowait * 1000 / clk_tck;
2677 }
2678
2679 if (i > 6) {
2680 linuxcpustat->has_irq = true;
2681 linuxcpustat->irq = irq * 1000 / clk_tck;
2682 linuxcpustat->has_softirq = true;
2683 linuxcpustat->softirq = softirq * 1000 / clk_tck;
2684 }
2685
2686 if (i > 8) {
2687 linuxcpustat->has_steal = true;
2688 linuxcpustat->steal = steal * 1000 / clk_tck;
2689 }
2690
2691 if (i > 9) {
2692 linuxcpustat->has_guest = true;
2693 linuxcpustat->guest = guest * 1000 / clk_tck;
2694 }
2695
2696 if (i > 10) {
2697 linuxcpustat->has_guest = true;
2698 linuxcpustat->guest = guest * 1000 / clk_tck;
2699 linuxcpustat->has_guestnice = true;
2700 linuxcpustat->guestnice = guest_nice * 1000 / clk_tck;
2701 }
2702
2703 QAPI_LIST_APPEND(tail, cpustat);
2704 }
2705
2706 free(line);
2707 fclose(fp);
2708 return head;
2709 }
2710
2711 #else /* defined(__linux__) */
2712
2713 void qmp_guest_suspend_disk(Error **errp)
2714 {
2715 error_setg(errp, QERR_UNSUPPORTED);
2716 }
2717
2718 void qmp_guest_suspend_ram(Error **errp)
2719 {
2720 error_setg(errp, QERR_UNSUPPORTED);
2721 }
2722
2723 void qmp_guest_suspend_hybrid(Error **errp)
2724 {
2725 error_setg(errp, QERR_UNSUPPORTED);
2726 }
2727
2728 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
2729 {
2730 error_setg(errp, QERR_UNSUPPORTED);
2731 return NULL;
2732 }
2733
2734 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
2735 {
2736 error_setg(errp, QERR_UNSUPPORTED);
2737 return -1;
2738 }
2739
2740 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp)
2741 {
2742 error_setg(errp, QERR_UNSUPPORTED);
2743 return NULL;
2744 }
2745
2746 GuestMemoryBlockResponseList *
2747 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp)
2748 {
2749 error_setg(errp, QERR_UNSUPPORTED);
2750 return NULL;
2751 }
2752
2753 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp)
2754 {
2755 error_setg(errp, QERR_UNSUPPORTED);
2756 return NULL;
2757 }
2758
2759 #endif
2760
2761 #ifdef HAVE_GETIFADDRS
2762 static GuestNetworkInterface *
2763 guest_find_interface(GuestNetworkInterfaceList *head,
2764 const char *name)
2765 {
2766 for (; head; head = head->next) {
2767 if (strcmp(head->value->name, name) == 0) {
2768 return head->value;
2769 }
2770 }
2771
2772 return NULL;
2773 }
2774
2775 static int guest_get_network_stats(const char *name,
2776 GuestNetworkInterfaceStat *stats)
2777 {
2778 #ifdef CONFIG_LINUX
2779 int name_len;
2780 char const *devinfo = "/proc/net/dev";
2781 FILE *fp;
2782 char *line = NULL, *colon;
2783 size_t n = 0;
2784 fp = fopen(devinfo, "r");
2785 if (!fp) {
2786 g_debug("failed to open network stats %s: %s", devinfo,
2787 g_strerror(errno));
2788 return -1;
2789 }
2790 name_len = strlen(name);
2791 while (getline(&line, &n, fp) != -1) {
2792 long long dummy;
2793 long long rx_bytes;
2794 long long rx_packets;
2795 long long rx_errs;
2796 long long rx_dropped;
2797 long long tx_bytes;
2798 long long tx_packets;
2799 long long tx_errs;
2800 long long tx_dropped;
2801 char *trim_line;
2802 trim_line = g_strchug(line);
2803 if (trim_line[0] == '\0') {
2804 continue;
2805 }
2806 colon = strchr(trim_line, ':');
2807 if (!colon) {
2808 continue;
2809 }
2810 if (colon - name_len == trim_line &&
2811 strncmp(trim_line, name, name_len) == 0) {
2812 if (sscanf(colon + 1,
2813 "%lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld",
2814 &rx_bytes, &rx_packets, &rx_errs, &rx_dropped,
2815 &dummy, &dummy, &dummy, &dummy,
2816 &tx_bytes, &tx_packets, &tx_errs, &tx_dropped,
2817 &dummy, &dummy, &dummy, &dummy) != 16) {
2818 continue;
2819 }
2820 stats->rx_bytes = rx_bytes;
2821 stats->rx_packets = rx_packets;
2822 stats->rx_errs = rx_errs;
2823 stats->rx_dropped = rx_dropped;
2824 stats->tx_bytes = tx_bytes;
2825 stats->tx_packets = tx_packets;
2826 stats->tx_errs = tx_errs;
2827 stats->tx_dropped = tx_dropped;
2828 fclose(fp);
2829 g_free(line);
2830 return 0;
2831 }
2832 }
2833 fclose(fp);
2834 g_free(line);
2835 g_debug("/proc/net/dev: Interface '%s' not found", name);
2836 #else /* !CONFIG_LINUX */
2837 g_debug("Network stats reporting available only for Linux");
2838 #endif /* !CONFIG_LINUX */
2839 return -1;
2840 }
2841
2842 #ifndef CONFIG_BSD
2843 /*
2844 * Fill "buf" with MAC address by ifaddrs. Pointer buf must point to a
2845 * buffer with ETHER_ADDR_LEN length at least.
2846 *
2847 * Returns false in case of an error, otherwise true. "obtained" argument
2848 * is true if a MAC address was obtained successful, otherwise false.
2849 */
2850 bool guest_get_hw_addr(struct ifaddrs *ifa, unsigned char *buf,
2851 bool *obtained, Error **errp)
2852 {
2853 struct ifreq ifr;
2854 int sock;
2855
2856 *obtained = false;
2857
2858 /* we haven't obtained HW address yet */
2859 sock = socket(PF_INET, SOCK_STREAM, 0);
2860 if (sock == -1) {
2861 error_setg_errno(errp, errno, "failed to create socket");
2862 return false;
2863 }
2864
2865 memset(&ifr, 0, sizeof(ifr));
2866 pstrcpy(ifr.ifr_name, IF_NAMESIZE, ifa->ifa_name);
2867 if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) {
2868 /*
2869 * We can't get the hw addr of this interface, but that's not a
2870 * fatal error.
2871 */
2872 if (errno == EADDRNOTAVAIL) {
2873 /* The interface doesn't have a hw addr (e.g. loopback). */
2874 g_debug("failed to get MAC address of %s: %s",
2875 ifa->ifa_name, strerror(errno));
2876 } else{
2877 g_warning("failed to get MAC address of %s: %s",
2878 ifa->ifa_name, strerror(errno));
2879 }
2880 } else {
2881 #ifdef CONFIG_SOLARIS
2882 memcpy(buf, &ifr.ifr_addr.sa_data, ETHER_ADDR_LEN);
2883 #else
2884 memcpy(buf, &ifr.ifr_hwaddr.sa_data, ETHER_ADDR_LEN);
2885 #endif
2886 *obtained = true;
2887 }
2888 close(sock);
2889 return true;
2890 }
2891 #endif /* CONFIG_BSD */
2892
2893 /*
2894 * Build information about guest interfaces
2895 */
2896 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
2897 {
2898 GuestNetworkInterfaceList *head = NULL, **tail = &head;
2899 struct ifaddrs *ifap, *ifa;
2900
2901 if (getifaddrs(&ifap) < 0) {
2902 error_setg_errno(errp, errno, "getifaddrs failed");
2903 goto error;
2904 }
2905
2906 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
2907 GuestNetworkInterface *info;
2908 GuestIpAddressList **address_tail;
2909 GuestIpAddress *address_item = NULL;
2910 GuestNetworkInterfaceStat *interface_stat = NULL;
2911 char addr4[INET_ADDRSTRLEN];
2912 char addr6[INET6_ADDRSTRLEN];
2913 unsigned char mac_addr[ETHER_ADDR_LEN];
2914 bool obtained;
2915 void *p;
2916
2917 g_debug("Processing %s interface", ifa->ifa_name);
2918
2919 info = guest_find_interface(head, ifa->ifa_name);
2920
2921 if (!info) {
2922 info = g_malloc0(sizeof(*info));
2923 info->name = g_strdup(ifa->ifa_name);
2924
2925 QAPI_LIST_APPEND(tail, info);
2926 }
2927
2928 if (!info->hardware_address) {
2929 if (!guest_get_hw_addr(ifa, mac_addr, &obtained, errp)) {
2930 goto error;
2931 }
2932 if (obtained) {
2933 info->hardware_address =
2934 g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x",
2935 (int) mac_addr[0], (int) mac_addr[1],
2936 (int) mac_addr[2], (int) mac_addr[3],
2937 (int) mac_addr[4], (int) mac_addr[5]);
2938 }
2939 }
2940
2941 if (ifa->ifa_addr &&
2942 ifa->ifa_addr->sa_family == AF_INET) {
2943 /* interface with IPv4 address */
2944 p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
2945 if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) {
2946 error_setg_errno(errp, errno, "inet_ntop failed");
2947 goto error;
2948 }
2949
2950 address_item = g_malloc0(sizeof(*address_item));
2951 address_item->ip_address = g_strdup(addr4);
2952 address_item->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4;
2953
2954 if (ifa->ifa_netmask) {
2955 /* Count the number of set bits in netmask.
2956 * This is safe as '1' and '0' cannot be shuffled in netmask. */
2957 p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr;
2958 address_item->prefix = ctpop32(((uint32_t *) p)[0]);
2959 }
2960 } else if (ifa->ifa_addr &&
2961 ifa->ifa_addr->sa_family == AF_INET6) {
2962 /* interface with IPv6 address */
2963 p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
2964 if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) {
2965 error_setg_errno(errp, errno, "inet_ntop failed");
2966 goto error;
2967 }
2968
2969 address_item = g_malloc0(sizeof(*address_item));
2970 address_item->ip_address = g_strdup(addr6);
2971 address_item->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6;
2972
2973 if (ifa->ifa_netmask) {
2974 /* Count the number of set bits in netmask.
2975 * This is safe as '1' and '0' cannot be shuffled in netmask. */
2976 p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr;
2977 address_item->prefix =
2978 ctpop32(((uint32_t *) p)[0]) +
2979 ctpop32(((uint32_t *) p)[1]) +
2980 ctpop32(((uint32_t *) p)[2]) +
2981 ctpop32(((uint32_t *) p)[3]);
2982 }
2983 }
2984
2985 if (!address_item) {
2986 continue;
2987 }
2988
2989 address_tail = &info->ip_addresses;
2990 while (*address_tail) {
2991 address_tail = &(*address_tail)->next;
2992 }
2993 QAPI_LIST_APPEND(address_tail, address_item);
2994
2995 info->has_ip_addresses = true;
2996
2997 if (!info->statistics) {
2998 interface_stat = g_malloc0(sizeof(*interface_stat));
2999 if (guest_get_network_stats(info->name, interface_stat) == -1) {
3000 g_free(interface_stat);
3001 } else {
3002 info->statistics = interface_stat;
3003 }
3004 }
3005 }
3006
3007 freeifaddrs(ifap);
3008 return head;
3009
3010 error:
3011 freeifaddrs(ifap);
3012 qapi_free_GuestNetworkInterfaceList(head);
3013 return NULL;
3014 }
3015
3016 #else
3017
3018 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
3019 {
3020 error_setg(errp, QERR_UNSUPPORTED);
3021 return NULL;
3022 }
3023
3024 #endif /* HAVE_GETIFADDRS */
3025
3026 #if !defined(CONFIG_FSFREEZE)
3027
3028 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
3029 {
3030 error_setg(errp, QERR_UNSUPPORTED);
3031 return NULL;
3032 }
3033
3034 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
3035 {
3036 error_setg(errp, QERR_UNSUPPORTED);
3037
3038 return 0;
3039 }
3040
3041 int64_t qmp_guest_fsfreeze_freeze(Error **errp)
3042 {
3043 error_setg(errp, QERR_UNSUPPORTED);
3044
3045 return 0;
3046 }
3047
3048 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
3049 strList *mountpoints,
3050 Error **errp)
3051 {
3052 error_setg(errp, QERR_UNSUPPORTED);
3053
3054 return 0;
3055 }
3056
3057 int64_t qmp_guest_fsfreeze_thaw(Error **errp)
3058 {
3059 error_setg(errp, QERR_UNSUPPORTED);
3060
3061 return 0;
3062 }
3063
3064 GuestDiskInfoList *qmp_guest_get_disks(Error **errp)
3065 {
3066 error_setg(errp, QERR_UNSUPPORTED);
3067 return NULL;
3068 }
3069
3070 GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp)
3071 {
3072 error_setg(errp, QERR_UNSUPPORTED);
3073 return NULL;
3074 }
3075
3076 GuestCpuStatsList *qmp_guest_get_cpustats(Error **errp)
3077 {
3078 error_setg(errp, QERR_UNSUPPORTED);
3079 return NULL;
3080 }
3081
3082 #endif /* CONFIG_FSFREEZE */
3083
3084 #if !defined(CONFIG_FSTRIM)
3085 GuestFilesystemTrimResponse *
3086 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
3087 {
3088 error_setg(errp, QERR_UNSUPPORTED);
3089 return NULL;
3090 }
3091 #endif
3092
3093 /* add unsupported commands to the list of blocked RPCs */
3094 GList *ga_command_init_blockedrpcs(GList *blockedrpcs)
3095 {
3096 #if !defined(__linux__)
3097 {
3098 const char *list[] = {
3099 "guest-suspend-disk", "guest-suspend-ram",
3100 "guest-suspend-hybrid", "guest-get-vcpus", "guest-set-vcpus",
3101 "guest-get-memory-blocks", "guest-set-memory-blocks",
3102 "guest-get-memory-block-size", "guest-get-memory-block-info",
3103 NULL};
3104 char **p = (char **)list;
3105
3106 while (*p) {
3107 blockedrpcs = g_list_append(blockedrpcs, g_strdup(*p++));
3108 }
3109 }
3110 #endif
3111
3112 #if !defined(HAVE_GETIFADDRS)
3113 blockedrpcs = g_list_append(blockedrpcs,
3114 g_strdup("guest-network-get-interfaces"));
3115 #endif
3116
3117 #if !defined(CONFIG_FSFREEZE)
3118 {
3119 const char *list[] = {
3120 "guest-get-fsinfo", "guest-fsfreeze-status",
3121 "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list",
3122 "guest-fsfreeze-thaw", "guest-get-fsinfo",
3123 "guest-get-disks", NULL};
3124 char **p = (char **)list;
3125
3126 while (*p) {
3127 blockedrpcs = g_list_append(blockedrpcs, g_strdup(*p++));
3128 }
3129 }
3130 #endif
3131
3132 #if !defined(CONFIG_FSTRIM)
3133 blockedrpcs = g_list_append(blockedrpcs, g_strdup("guest-fstrim"));
3134 #endif
3135
3136 blockedrpcs = g_list_append(blockedrpcs, g_strdup("guest-get-devices"));
3137
3138 return blockedrpcs;
3139 }
3140
3141 /* register init/cleanup routines for stateful command groups */
3142 void ga_command_state_init(GAState *s, GACommandState *cs)
3143 {
3144 #if defined(CONFIG_FSFREEZE)
3145 ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup);
3146 #endif
3147 }
3148
3149 #ifdef HAVE_UTMPX
3150
3151 #define QGA_MICRO_SECOND_TO_SECOND 1000000
3152
3153 static double ga_get_login_time(struct utmpx *user_info)
3154 {
3155 double seconds = (double)user_info->ut_tv.tv_sec;
3156 double useconds = (double)user_info->ut_tv.tv_usec;
3157 useconds /= QGA_MICRO_SECOND_TO_SECOND;
3158 return seconds + useconds;
3159 }
3160
3161 GuestUserList *qmp_guest_get_users(Error **errp)
3162 {
3163 GHashTable *cache = NULL;
3164 GuestUserList *head = NULL, **tail = &head;
3165 struct utmpx *user_info = NULL;
3166 gpointer value = NULL;
3167 GuestUser *user = NULL;
3168 double login_time = 0;
3169
3170 cache = g_hash_table_new(g_str_hash, g_str_equal);
3171 setutxent();
3172
3173 for (;;) {
3174 user_info = getutxent();
3175 if (user_info == NULL) {
3176 break;
3177 } else if (user_info->ut_type != USER_PROCESS) {
3178 continue;
3179 } else if (g_hash_table_contains(cache, user_info->ut_user)) {
3180 value = g_hash_table_lookup(cache, user_info->ut_user);
3181 user = (GuestUser *)value;
3182 login_time = ga_get_login_time(user_info);
3183 /* We're ensuring the earliest login time to be sent */
3184 if (login_time < user->login_time) {
3185 user->login_time = login_time;
3186 }
3187 continue;
3188 }
3189
3190 user = g_new0(GuestUser, 1);
3191 user->user = g_strdup(user_info->ut_user);
3192 user->login_time = ga_get_login_time(user_info);
3193
3194 g_hash_table_insert(cache, user->user, user);
3195
3196 QAPI_LIST_APPEND(tail, user);
3197 }
3198 endutxent();
3199 g_hash_table_destroy(cache);
3200 return head;
3201 }
3202
3203 #else
3204
3205 GuestUserList *qmp_guest_get_users(Error **errp)
3206 {
3207 error_setg(errp, QERR_UNSUPPORTED);
3208 return NULL;
3209 }
3210
3211 #endif
3212
3213 /* Replace escaped special characters with their real values. The replacement
3214 * is done in place -- returned value is in the original string.
3215 */
3216 static void ga_osrelease_replace_special(gchar *value)
3217 {
3218 gchar *p, *p2, quote;
3219
3220 /* Trim the string at first space or semicolon if it is not enclosed in
3221 * single or double quotes. */
3222 if ((value[0] != '"') || (value[0] == '\'')) {
3223 p = strchr(value, ' ');
3224 if (p != NULL) {
3225 *p = 0;
3226 }
3227 p = strchr(value, ';');
3228 if (p != NULL) {
3229 *p = 0;
3230 }
3231 return;
3232 }
3233
3234 quote = value[0];
3235 p2 = value;
3236 p = value + 1;
3237 while (*p != 0) {
3238 if (*p == '\\') {
3239 p++;
3240 switch (*p) {
3241 case '$':
3242 case '\'':
3243 case '"':
3244 case '\\':
3245 case '`':
3246 break;
3247 default:
3248 /* Keep literal backslash followed by whatever is there */
3249 p--;
3250 break;
3251 }
3252 } else if (*p == quote) {
3253 *p2 = 0;
3254 break;
3255 }
3256 *(p2++) = *(p++);
3257 }
3258 }
3259
3260 static GKeyFile *ga_parse_osrelease(const char *fname)
3261 {
3262 gchar *content = NULL;
3263 gchar *content2 = NULL;
3264 GError *err = NULL;
3265 GKeyFile *keys = g_key_file_new();
3266 const char *group = "[os-release]\n";
3267
3268 if (!g_file_get_contents(fname, &content, NULL, &err)) {
3269 slog("failed to read '%s', error: %s", fname, err->message);
3270 goto fail;
3271 }
3272
3273 if (!g_utf8_validate(content, -1, NULL)) {
3274 slog("file is not utf-8 encoded: %s", fname);
3275 goto fail;
3276 }
3277 content2 = g_strdup_printf("%s%s", group, content);
3278
3279 if (!g_key_file_load_from_data(keys, content2, -1, G_KEY_FILE_NONE,
3280 &err)) {
3281 slog("failed to parse file '%s', error: %s", fname, err->message);
3282 goto fail;
3283 }
3284
3285 g_free(content);
3286 g_free(content2);
3287 return keys;
3288
3289 fail:
3290 g_error_free(err);
3291 g_free(content);
3292 g_free(content2);
3293 g_key_file_free(keys);
3294 return NULL;
3295 }
3296
3297 GuestOSInfo *qmp_guest_get_osinfo(Error **errp)
3298 {
3299 GuestOSInfo *info = NULL;
3300 struct utsname kinfo;
3301 GKeyFile *osrelease = NULL;
3302 const char *qga_os_release = g_getenv("QGA_OS_RELEASE");
3303
3304 info = g_new0(GuestOSInfo, 1);
3305
3306 if (uname(&kinfo) != 0) {
3307 error_setg_errno(errp, errno, "uname failed");
3308 } else {
3309 info->kernel_version = g_strdup(kinfo.version);
3310 info->kernel_release = g_strdup(kinfo.release);
3311 info->machine = g_strdup(kinfo.machine);
3312 }
3313
3314 if (qga_os_release != NULL) {
3315 osrelease = ga_parse_osrelease(qga_os_release);
3316 } else {
3317 osrelease = ga_parse_osrelease("/etc/os-release");
3318 if (osrelease == NULL) {
3319 osrelease = ga_parse_osrelease("/usr/lib/os-release");
3320 }
3321 }
3322
3323 if (osrelease != NULL) {
3324 char *value;
3325
3326 #define GET_FIELD(field, osfield) do { \
3327 value = g_key_file_get_value(osrelease, "os-release", osfield, NULL); \
3328 if (value != NULL) { \
3329 ga_osrelease_replace_special(value); \
3330 info->field = value; \
3331 } \
3332 } while (0)
3333 GET_FIELD(id, "ID");
3334 GET_FIELD(name, "NAME");
3335 GET_FIELD(pretty_name, "PRETTY_NAME");
3336 GET_FIELD(version, "VERSION");
3337 GET_FIELD(version_id, "VERSION_ID");
3338 GET_FIELD(variant, "VARIANT");
3339 GET_FIELD(variant_id, "VARIANT_ID");
3340 #undef GET_FIELD
3341
3342 g_key_file_free(osrelease);
3343 }
3344
3345 return info;
3346 }
3347
3348 GuestDeviceInfoList *qmp_guest_get_devices(Error **errp)
3349 {
3350 error_setg(errp, QERR_UNSUPPORTED);
3351
3352 return NULL;
3353 }
3354
3355 #ifndef HOST_NAME_MAX
3356 # ifdef _POSIX_HOST_NAME_MAX
3357 # define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
3358 # else
3359 # define HOST_NAME_MAX 255
3360 # endif
3361 #endif
3362
3363 char *qga_get_host_name(Error **errp)
3364 {
3365 long len = -1;
3366 g_autofree char *hostname = NULL;
3367
3368 #ifdef _SC_HOST_NAME_MAX
3369 len = sysconf(_SC_HOST_NAME_MAX);
3370 #endif /* _SC_HOST_NAME_MAX */
3371
3372 if (len < 0) {
3373 len = HOST_NAME_MAX;
3374 }
3375
3376 /* Unfortunately, gethostname() below does not guarantee a
3377 * NULL terminated string. Therefore, allocate one byte more
3378 * to be sure. */
3379 hostname = g_new0(char, len + 1);
3380
3381 if (gethostname(hostname, len) < 0) {
3382 error_setg_errno(errp, errno,
3383 "cannot get hostname");
3384 return NULL;
3385 }
3386
3387 return g_steal_pointer(&hostname);
3388 }
armbru's QEMU hackery