block: List anonymous device BBs in query-block
[qemu/kevin.git] / qga / commands-posix.c
blobd8e412275e5b48f1fda7be3a9e9c10587b7b959d
1 /*
2 * QEMU Guest Agent POSIX-specific command implementations
4 * Copyright IBM Corp. 2011
6 * Authors:
7 * Michael Roth <mdroth@linux.vnet.ibm.com>
8 * Michal Privoznik <mprivozn@redhat.com>
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.
14 #include "qemu/osdep.h"
15 #include <sys/ioctl.h>
16 #include <sys/wait.h>
17 #include <dirent.h>
18 #include <utmpx.h>
19 #include "qga/guest-agent-core.h"
20 #include "qga-qmp-commands.h"
21 #include "qapi/qmp/qerror.h"
22 #include "qemu/queue.h"
23 #include "qemu/host-utils.h"
24 #include "qemu/sockets.h"
25 #include "qemu/base64.h"
26 #include "qemu/cutils.h"
28 #ifndef CONFIG_HAS_ENVIRON
29 #ifdef __APPLE__
30 #include <crt_externs.h>
31 #define environ (*_NSGetEnviron())
32 #else
33 extern char **environ;
34 #endif
35 #endif
37 #if defined(__linux__)
38 #include <mntent.h>
39 #include <linux/fs.h>
40 #include <ifaddrs.h>
41 #include <arpa/inet.h>
42 #include <sys/socket.h>
43 #include <net/if.h>
45 #ifdef FIFREEZE
46 #define CONFIG_FSFREEZE
47 #endif
48 #ifdef FITRIM
49 #define CONFIG_FSTRIM
50 #endif
51 #endif
53 static void ga_wait_child(pid_t pid, int *status, Error **errp)
55 pid_t rpid;
57 *status = 0;
59 do {
60 rpid = waitpid(pid, status, 0);
61 } while (rpid == -1 && errno == EINTR);
63 if (rpid == -1) {
64 error_setg_errno(errp, errno, "failed to wait for child (pid: %d)",
65 pid);
66 return;
69 g_assert(rpid == pid);
72 void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp)
74 const char *shutdown_flag;
75 Error *local_err = NULL;
76 pid_t pid;
77 int status;
79 slog("guest-shutdown called, mode: %s", mode);
80 if (!has_mode || strcmp(mode, "powerdown") == 0) {
81 shutdown_flag = "-P";
82 } else if (strcmp(mode, "halt") == 0) {
83 shutdown_flag = "-H";
84 } else if (strcmp(mode, "reboot") == 0) {
85 shutdown_flag = "-r";
86 } else {
87 error_setg(errp,
88 "mode is invalid (valid values are: halt|powerdown|reboot");
89 return;
92 pid = fork();
93 if (pid == 0) {
94 /* child, start the shutdown */
95 setsid();
96 reopen_fd_to_null(0);
97 reopen_fd_to_null(1);
98 reopen_fd_to_null(2);
100 execle("/sbin/shutdown", "shutdown", "-h", shutdown_flag, "+0",
101 "hypervisor initiated shutdown", (char*)NULL, environ);
102 _exit(EXIT_FAILURE);
103 } else if (pid < 0) {
104 error_setg_errno(errp, errno, "failed to create child process");
105 return;
108 ga_wait_child(pid, &status, &local_err);
109 if (local_err) {
110 error_propagate(errp, local_err);
111 return;
114 if (!WIFEXITED(status)) {
115 error_setg(errp, "child process has terminated abnormally");
116 return;
119 if (WEXITSTATUS(status)) {
120 error_setg(errp, "child process has failed to shutdown");
121 return;
124 /* succeeded */
127 int64_t qmp_guest_get_time(Error **errp)
129 int ret;
130 qemu_timeval tq;
132 ret = qemu_gettimeofday(&tq);
133 if (ret < 0) {
134 error_setg_errno(errp, errno, "Failed to get time");
135 return -1;
138 return tq.tv_sec * 1000000000LL + tq.tv_usec * 1000;
141 void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp)
143 int ret;
144 int status;
145 pid_t pid;
146 Error *local_err = NULL;
147 struct timeval tv;
149 /* If user has passed a time, validate and set it. */
150 if (has_time) {
151 GDate date = { 0, };
153 /* year-2038 will overflow in case time_t is 32bit */
154 if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) {
155 error_setg(errp, "Time %" PRId64 " is too large", time_ns);
156 return;
159 tv.tv_sec = time_ns / 1000000000;
160 tv.tv_usec = (time_ns % 1000000000) / 1000;
161 g_date_set_time_t(&date, tv.tv_sec);
162 if (date.year < 1970 || date.year >= 2070) {
163 error_setg_errno(errp, errno, "Invalid time");
164 return;
167 ret = settimeofday(&tv, NULL);
168 if (ret < 0) {
169 error_setg_errno(errp, errno, "Failed to set time to guest");
170 return;
174 /* Now, if user has passed a time to set and the system time is set, we
175 * just need to synchronize the hardware clock. However, if no time was
176 * passed, user is requesting the opposite: set the system time from the
177 * hardware clock (RTC). */
178 pid = fork();
179 if (pid == 0) {
180 setsid();
181 reopen_fd_to_null(0);
182 reopen_fd_to_null(1);
183 reopen_fd_to_null(2);
185 /* Use '/sbin/hwclock -w' to set RTC from the system time,
186 * or '/sbin/hwclock -s' to set the system time from RTC. */
187 execle("/sbin/hwclock", "hwclock", has_time ? "-w" : "-s",
188 NULL, environ);
189 _exit(EXIT_FAILURE);
190 } else if (pid < 0) {
191 error_setg_errno(errp, errno, "failed to create child process");
192 return;
195 ga_wait_child(pid, &status, &local_err);
196 if (local_err) {
197 error_propagate(errp, local_err);
198 return;
201 if (!WIFEXITED(status)) {
202 error_setg(errp, "child process has terminated abnormally");
203 return;
206 if (WEXITSTATUS(status)) {
207 error_setg(errp, "hwclock failed to set hardware clock to system time");
208 return;
212 typedef enum {
213 RW_STATE_NEW,
214 RW_STATE_READING,
215 RW_STATE_WRITING,
216 } RwState;
218 typedef struct GuestFileHandle {
219 uint64_t id;
220 FILE *fh;
221 RwState state;
222 QTAILQ_ENTRY(GuestFileHandle) next;
223 } GuestFileHandle;
225 static struct {
226 QTAILQ_HEAD(, GuestFileHandle) filehandles;
227 } guest_file_state = {
228 .filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles),
231 static int64_t guest_file_handle_add(FILE *fh, Error **errp)
233 GuestFileHandle *gfh;
234 int64_t handle;
236 handle = ga_get_fd_handle(ga_state, errp);
237 if (handle < 0) {
238 return -1;
241 gfh = g_new0(GuestFileHandle, 1);
242 gfh->id = handle;
243 gfh->fh = fh;
244 QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next);
246 return handle;
249 static GuestFileHandle *guest_file_handle_find(int64_t id, Error **errp)
251 GuestFileHandle *gfh;
253 QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next)
255 if (gfh->id == id) {
256 return gfh;
260 error_setg(errp, "handle '%" PRId64 "' has not been found", id);
261 return NULL;
264 typedef const char * const ccpc;
266 #ifndef O_BINARY
267 #define O_BINARY 0
268 #endif
270 /* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */
271 static const struct {
272 ccpc *forms;
273 int oflag_base;
274 } guest_file_open_modes[] = {
275 { (ccpc[]){ "r", NULL }, O_RDONLY },
276 { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY },
277 { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC },
278 { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY },
279 { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND },
280 { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY },
281 { (ccpc[]){ "r+", NULL }, O_RDWR },
282 { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY },
283 { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC },
284 { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY },
285 { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND },
286 { (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY }
289 static int
290 find_open_flag(const char *mode_str, Error **errp)
292 unsigned mode;
294 for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) {
295 ccpc *form;
297 form = guest_file_open_modes[mode].forms;
298 while (*form != NULL && strcmp(*form, mode_str) != 0) {
299 ++form;
301 if (*form != NULL) {
302 break;
306 if (mode == ARRAY_SIZE(guest_file_open_modes)) {
307 error_setg(errp, "invalid file open mode '%s'", mode_str);
308 return -1;
310 return guest_file_open_modes[mode].oflag_base | O_NOCTTY | O_NONBLOCK;
313 #define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \
314 S_IRGRP | S_IWGRP | \
315 S_IROTH | S_IWOTH)
317 static FILE *
318 safe_open_or_create(const char *path, const char *mode, Error **errp)
320 Error *local_err = NULL;
321 int oflag;
323 oflag = find_open_flag(mode, &local_err);
324 if (local_err == NULL) {
325 int fd;
327 /* If the caller wants / allows creation of a new file, we implement it
328 * with a two step process: open() + (open() / fchmod()).
330 * First we insist on creating the file exclusively as a new file. If
331 * that succeeds, we're free to set any file-mode bits on it. (The
332 * motivation is that we want to set those file-mode bits independently
333 * of the current umask.)
335 * If the exclusive creation fails because the file already exists
336 * (EEXIST is not possible for any other reason), we just attempt to
337 * open the file, but in this case we won't be allowed to change the
338 * file-mode bits on the preexistent file.
340 * The pathname should never disappear between the two open()s in
341 * practice. If it happens, then someone very likely tried to race us.
342 * In this case just go ahead and report the ENOENT from the second
343 * open() to the caller.
345 * If the caller wants to open a preexistent file, then the first
346 * open() is decisive and its third argument is ignored, and the second
347 * open() and the fchmod() are never called.
349 fd = open(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0);
350 if (fd == -1 && errno == EEXIST) {
351 oflag &= ~(unsigned)O_CREAT;
352 fd = open(path, oflag);
355 if (fd == -1) {
356 error_setg_errno(&local_err, errno, "failed to open file '%s' "
357 "(mode: '%s')", path, mode);
358 } else {
359 qemu_set_cloexec(fd);
361 if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) {
362 error_setg_errno(&local_err, errno, "failed to set permission "
363 "0%03o on new file '%s' (mode: '%s')",
364 (unsigned)DEFAULT_NEW_FILE_MODE, path, mode);
365 } else {
366 FILE *f;
368 f = fdopen(fd, mode);
369 if (f == NULL) {
370 error_setg_errno(&local_err, errno, "failed to associate "
371 "stdio stream with file descriptor %d, "
372 "file '%s' (mode: '%s')", fd, path, mode);
373 } else {
374 return f;
378 close(fd);
379 if (oflag & O_CREAT) {
380 unlink(path);
385 error_propagate(errp, local_err);
386 return NULL;
389 int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode,
390 Error **errp)
392 FILE *fh;
393 Error *local_err = NULL;
394 int64_t handle;
396 if (!has_mode) {
397 mode = "r";
399 slog("guest-file-open called, filepath: %s, mode: %s", path, mode);
400 fh = safe_open_or_create(path, mode, &local_err);
401 if (local_err != NULL) {
402 error_propagate(errp, local_err);
403 return -1;
406 /* set fd non-blocking to avoid common use cases (like reading from a
407 * named pipe) from hanging the agent
409 qemu_set_nonblock(fileno(fh));
411 handle = guest_file_handle_add(fh, errp);
412 if (handle < 0) {
413 fclose(fh);
414 return -1;
417 slog("guest-file-open, handle: %" PRId64, handle);
418 return handle;
421 void qmp_guest_file_close(int64_t handle, Error **errp)
423 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
424 int ret;
426 slog("guest-file-close called, handle: %" PRId64, handle);
427 if (!gfh) {
428 return;
431 ret = fclose(gfh->fh);
432 if (ret == EOF) {
433 error_setg_errno(errp, errno, "failed to close handle");
434 return;
437 QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next);
438 g_free(gfh);
441 struct GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count,
442 int64_t count, Error **errp)
444 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
445 GuestFileRead *read_data = NULL;
446 guchar *buf;
447 FILE *fh;
448 size_t read_count;
450 if (!gfh) {
451 return NULL;
454 if (!has_count) {
455 count = QGA_READ_COUNT_DEFAULT;
456 } else if (count < 0) {
457 error_setg(errp, "value '%" PRId64 "' is invalid for argument count",
458 count);
459 return NULL;
462 fh = gfh->fh;
464 /* explicitly flush when switching from writing to reading */
465 if (gfh->state == RW_STATE_WRITING) {
466 int ret = fflush(fh);
467 if (ret == EOF) {
468 error_setg_errno(errp, errno, "failed to flush file");
469 return NULL;
471 gfh->state = RW_STATE_NEW;
474 buf = g_malloc0(count+1);
475 read_count = fread(buf, 1, count, fh);
476 if (ferror(fh)) {
477 error_setg_errno(errp, errno, "failed to read file");
478 slog("guest-file-read failed, handle: %" PRId64, handle);
479 } else {
480 buf[read_count] = 0;
481 read_data = g_new0(GuestFileRead, 1);
482 read_data->count = read_count;
483 read_data->eof = feof(fh);
484 if (read_count) {
485 read_data->buf_b64 = g_base64_encode(buf, read_count);
487 gfh->state = RW_STATE_READING;
489 g_free(buf);
490 clearerr(fh);
492 return read_data;
495 GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64,
496 bool has_count, int64_t count,
497 Error **errp)
499 GuestFileWrite *write_data = NULL;
500 guchar *buf;
501 gsize buf_len;
502 int write_count;
503 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
504 FILE *fh;
506 if (!gfh) {
507 return NULL;
510 fh = gfh->fh;
512 if (gfh->state == RW_STATE_READING) {
513 int ret = fseek(fh, 0, SEEK_CUR);
514 if (ret == -1) {
515 error_setg_errno(errp, errno, "failed to seek file");
516 return NULL;
518 gfh->state = RW_STATE_NEW;
521 buf = qbase64_decode(buf_b64, -1, &buf_len, errp);
522 if (!buf) {
523 return NULL;
526 if (!has_count) {
527 count = buf_len;
528 } else if (count < 0 || count > buf_len) {
529 error_setg(errp, "value '%" PRId64 "' is invalid for argument count",
530 count);
531 g_free(buf);
532 return NULL;
535 write_count = fwrite(buf, 1, count, fh);
536 if (ferror(fh)) {
537 error_setg_errno(errp, errno, "failed to write to file");
538 slog("guest-file-write failed, handle: %" PRId64, handle);
539 } else {
540 write_data = g_new0(GuestFileWrite, 1);
541 write_data->count = write_count;
542 write_data->eof = feof(fh);
543 gfh->state = RW_STATE_WRITING;
545 g_free(buf);
546 clearerr(fh);
548 return write_data;
551 struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset,
552 GuestFileWhence *whence_code,
553 Error **errp)
555 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
556 GuestFileSeek *seek_data = NULL;
557 FILE *fh;
558 int ret;
559 int whence;
560 Error *err = NULL;
562 if (!gfh) {
563 return NULL;
566 /* We stupidly exposed 'whence':'int' in our qapi */
567 whence = ga_parse_whence(whence_code, &err);
568 if (err) {
569 error_propagate(errp, err);
570 return NULL;
573 fh = gfh->fh;
574 ret = fseek(fh, offset, whence);
575 if (ret == -1) {
576 error_setg_errno(errp, errno, "failed to seek file");
577 if (errno == ESPIPE) {
578 /* file is non-seekable, stdio shouldn't be buffering anyways */
579 gfh->state = RW_STATE_NEW;
581 } else {
582 seek_data = g_new0(GuestFileSeek, 1);
583 seek_data->position = ftell(fh);
584 seek_data->eof = feof(fh);
585 gfh->state = RW_STATE_NEW;
587 clearerr(fh);
589 return seek_data;
592 void qmp_guest_file_flush(int64_t handle, Error **errp)
594 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
595 FILE *fh;
596 int ret;
598 if (!gfh) {
599 return;
602 fh = gfh->fh;
603 ret = fflush(fh);
604 if (ret == EOF) {
605 error_setg_errno(errp, errno, "failed to flush file");
606 } else {
607 gfh->state = RW_STATE_NEW;
611 /* linux-specific implementations. avoid this if at all possible. */
612 #if defined(__linux__)
614 #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM)
615 typedef struct FsMount {
616 char *dirname;
617 char *devtype;
618 unsigned int devmajor, devminor;
619 QTAILQ_ENTRY(FsMount) next;
620 } FsMount;
622 typedef QTAILQ_HEAD(FsMountList, FsMount) FsMountList;
624 static void free_fs_mount_list(FsMountList *mounts)
626 FsMount *mount, *temp;
628 if (!mounts) {
629 return;
632 QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) {
633 QTAILQ_REMOVE(mounts, mount, next);
634 g_free(mount->dirname);
635 g_free(mount->devtype);
636 g_free(mount);
640 static int dev_major_minor(const char *devpath,
641 unsigned int *devmajor, unsigned int *devminor)
643 struct stat st;
645 *devmajor = 0;
646 *devminor = 0;
648 if (stat(devpath, &st) < 0) {
649 slog("failed to stat device file '%s': %s", devpath, strerror(errno));
650 return -1;
652 if (S_ISDIR(st.st_mode)) {
653 /* It is bind mount */
654 return -2;
656 if (S_ISBLK(st.st_mode)) {
657 *devmajor = major(st.st_rdev);
658 *devminor = minor(st.st_rdev);
659 return 0;
661 return -1;
665 * Walk the mount table and build a list of local file systems
667 static void build_fs_mount_list_from_mtab(FsMountList *mounts, Error **errp)
669 struct mntent *ment;
670 FsMount *mount;
671 char const *mtab = "/proc/self/mounts";
672 FILE *fp;
673 unsigned int devmajor, devminor;
675 fp = setmntent(mtab, "r");
676 if (!fp) {
677 error_setg(errp, "failed to open mtab file: '%s'", mtab);
678 return;
681 while ((ment = getmntent(fp))) {
683 * An entry which device name doesn't start with a '/' is
684 * either a dummy file system or a network file system.
685 * Add special handling for smbfs and cifs as is done by
686 * coreutils as well.
688 if ((ment->mnt_fsname[0] != '/') ||
689 (strcmp(ment->mnt_type, "smbfs") == 0) ||
690 (strcmp(ment->mnt_type, "cifs") == 0)) {
691 continue;
693 if (dev_major_minor(ment->mnt_fsname, &devmajor, &devminor) == -2) {
694 /* Skip bind mounts */
695 continue;
698 mount = g_new0(FsMount, 1);
699 mount->dirname = g_strdup(ment->mnt_dir);
700 mount->devtype = g_strdup(ment->mnt_type);
701 mount->devmajor = devmajor;
702 mount->devminor = devminor;
704 QTAILQ_INSERT_TAIL(mounts, mount, next);
707 endmntent(fp);
710 static void decode_mntname(char *name, int len)
712 int i, j = 0;
713 for (i = 0; i <= len; i++) {
714 if (name[i] != '\\') {
715 name[j++] = name[i];
716 } else if (name[i + 1] == '\\') {
717 name[j++] = '\\';
718 i++;
719 } else if (name[i + 1] >= '0' && name[i + 1] <= '3' &&
720 name[i + 2] >= '0' && name[i + 2] <= '7' &&
721 name[i + 3] >= '0' && name[i + 3] <= '7') {
722 name[j++] = (name[i + 1] - '0') * 64 +
723 (name[i + 2] - '0') * 8 +
724 (name[i + 3] - '0');
725 i += 3;
726 } else {
727 name[j++] = name[i];
732 static void build_fs_mount_list(FsMountList *mounts, Error **errp)
734 FsMount *mount;
735 char const *mountinfo = "/proc/self/mountinfo";
736 FILE *fp;
737 char *line = NULL, *dash;
738 size_t n;
739 char check;
740 unsigned int devmajor, devminor;
741 int ret, dir_s, dir_e, type_s, type_e, dev_s, dev_e;
743 fp = fopen(mountinfo, "r");
744 if (!fp) {
745 build_fs_mount_list_from_mtab(mounts, errp);
746 return;
749 while (getline(&line, &n, fp) != -1) {
750 ret = sscanf(line, "%*u %*u %u:%u %*s %n%*s%n%c",
751 &devmajor, &devminor, &dir_s, &dir_e, &check);
752 if (ret < 3) {
753 continue;
755 dash = strstr(line + dir_e, " - ");
756 if (!dash) {
757 continue;
759 ret = sscanf(dash, " - %n%*s%n %n%*s%n%c",
760 &type_s, &type_e, &dev_s, &dev_e, &check);
761 if (ret < 1) {
762 continue;
764 line[dir_e] = 0;
765 dash[type_e] = 0;
766 dash[dev_e] = 0;
767 decode_mntname(line + dir_s, dir_e - dir_s);
768 decode_mntname(dash + dev_s, dev_e - dev_s);
769 if (devmajor == 0) {
770 /* btrfs reports major number = 0 */
771 if (strcmp("btrfs", dash + type_s) != 0 ||
772 dev_major_minor(dash + dev_s, &devmajor, &devminor) < 0) {
773 continue;
777 mount = g_new0(FsMount, 1);
778 mount->dirname = g_strdup(line + dir_s);
779 mount->devtype = g_strdup(dash + type_s);
780 mount->devmajor = devmajor;
781 mount->devminor = devminor;
783 QTAILQ_INSERT_TAIL(mounts, mount, next);
785 free(line);
787 fclose(fp);
789 #endif
791 #if defined(CONFIG_FSFREEZE)
793 static char *get_pci_driver(char const *syspath, int pathlen, Error **errp)
795 char *path;
796 char *dpath;
797 char *driver = NULL;
798 char buf[PATH_MAX];
799 ssize_t len;
801 path = g_strndup(syspath, pathlen);
802 dpath = g_strdup_printf("%s/driver", path);
803 len = readlink(dpath, buf, sizeof(buf) - 1);
804 if (len != -1) {
805 buf[len] = 0;
806 driver = g_strdup(basename(buf));
808 g_free(dpath);
809 g_free(path);
810 return driver;
813 static int compare_uint(const void *_a, const void *_b)
815 unsigned int a = *(unsigned int *)_a;
816 unsigned int b = *(unsigned int *)_b;
818 return a < b ? -1 : a > b ? 1 : 0;
821 /* Walk the specified sysfs and build a sorted list of host or ata numbers */
822 static int build_hosts(char const *syspath, char const *host, bool ata,
823 unsigned int *hosts, int hosts_max, Error **errp)
825 char *path;
826 DIR *dir;
827 struct dirent *entry;
828 int i = 0;
830 path = g_strndup(syspath, host - syspath);
831 dir = opendir(path);
832 if (!dir) {
833 error_setg_errno(errp, errno, "opendir(\"%s\")", path);
834 g_free(path);
835 return -1;
838 while (i < hosts_max) {
839 entry = readdir(dir);
840 if (!entry) {
841 break;
843 if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) {
844 ++i;
845 } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) {
846 ++i;
850 qsort(hosts, i, sizeof(hosts[0]), compare_uint);
852 g_free(path);
853 closedir(dir);
854 return i;
857 /* Store disk device info specified by @sysfs into @fs */
858 static void build_guest_fsinfo_for_real_device(char const *syspath,
859 GuestFilesystemInfo *fs,
860 Error **errp)
862 unsigned int pci[4], host, hosts[8], tgt[3];
863 int i, nhosts = 0, pcilen;
864 GuestDiskAddress *disk;
865 GuestPCIAddress *pciaddr;
866 GuestDiskAddressList *list = NULL;
867 bool has_ata = false, has_host = false, has_tgt = false;
868 char *p, *q, *driver = NULL;
870 p = strstr(syspath, "/devices/pci");
871 if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n",
872 pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) {
873 g_debug("only pci device is supported: sysfs path \"%s\"", syspath);
874 return;
877 driver = get_pci_driver(syspath, (p + 12 + pcilen) - syspath, errp);
878 if (!driver) {
879 goto cleanup;
882 p = strstr(syspath, "/target");
883 if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u",
884 tgt, tgt + 1, tgt + 2) == 3) {
885 has_tgt = true;
888 p = strstr(syspath, "/ata");
889 if (p) {
890 q = p + 4;
891 has_ata = true;
892 } else {
893 p = strstr(syspath, "/host");
894 q = p + 5;
896 if (p && sscanf(q, "%u", &host) == 1) {
897 has_host = true;
898 nhosts = build_hosts(syspath, p, has_ata, hosts,
899 sizeof(hosts) / sizeof(hosts[0]), errp);
900 if (nhosts < 0) {
901 goto cleanup;
905 pciaddr = g_malloc0(sizeof(*pciaddr));
906 pciaddr->domain = pci[0];
907 pciaddr->bus = pci[1];
908 pciaddr->slot = pci[2];
909 pciaddr->function = pci[3];
911 disk = g_malloc0(sizeof(*disk));
912 disk->pci_controller = pciaddr;
914 list = g_malloc0(sizeof(*list));
915 list->value = disk;
917 if (strcmp(driver, "ata_piix") == 0) {
918 /* a host per ide bus, target*:0:<unit>:0 */
919 if (!has_host || !has_tgt) {
920 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
921 goto cleanup;
923 for (i = 0; i < nhosts; i++) {
924 if (host == hosts[i]) {
925 disk->bus_type = GUEST_DISK_BUS_TYPE_IDE;
926 disk->bus = i;
927 disk->unit = tgt[1];
928 break;
931 if (i >= nhosts) {
932 g_debug("no host for '%s' (driver '%s')", syspath, driver);
933 goto cleanup;
935 } else if (strcmp(driver, "sym53c8xx") == 0) {
936 /* scsi(LSI Logic): target*:0:<unit>:0 */
937 if (!has_tgt) {
938 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
939 goto cleanup;
941 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
942 disk->unit = tgt[1];
943 } else if (strcmp(driver, "virtio-pci") == 0) {
944 if (has_tgt) {
945 /* virtio-scsi: target*:0:0:<unit> */
946 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
947 disk->unit = tgt[2];
948 } else {
949 /* virtio-blk: 1 disk per 1 device */
950 disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO;
952 } else if (strcmp(driver, "ahci") == 0) {
953 /* ahci: 1 host per 1 unit */
954 if (!has_host || !has_tgt) {
955 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
956 goto cleanup;
958 for (i = 0; i < nhosts; i++) {
959 if (host == hosts[i]) {
960 disk->unit = i;
961 disk->bus_type = GUEST_DISK_BUS_TYPE_SATA;
962 break;
965 if (i >= nhosts) {
966 g_debug("no host for '%s' (driver '%s')", syspath, driver);
967 goto cleanup;
969 } else {
970 g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath);
971 goto cleanup;
974 list->next = fs->disk;
975 fs->disk = list;
976 g_free(driver);
977 return;
979 cleanup:
980 if (list) {
981 qapi_free_GuestDiskAddressList(list);
983 g_free(driver);
986 static void build_guest_fsinfo_for_device(char const *devpath,
987 GuestFilesystemInfo *fs,
988 Error **errp);
990 /* Store a list of slave devices of virtual volume specified by @syspath into
991 * @fs */
992 static void build_guest_fsinfo_for_virtual_device(char const *syspath,
993 GuestFilesystemInfo *fs,
994 Error **errp)
996 DIR *dir;
997 char *dirpath;
998 struct dirent *entry;
1000 dirpath = g_strdup_printf("%s/slaves", syspath);
1001 dir = opendir(dirpath);
1002 if (!dir) {
1003 if (errno != ENOENT) {
1004 error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath);
1006 g_free(dirpath);
1007 return;
1010 for (;;) {
1011 errno = 0;
1012 entry = readdir(dir);
1013 if (entry == NULL) {
1014 if (errno) {
1015 error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath);
1017 break;
1020 if (entry->d_type == DT_LNK) {
1021 char *path;
1023 g_debug(" slave device '%s'", entry->d_name);
1024 path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name);
1025 build_guest_fsinfo_for_device(path, fs, errp);
1026 g_free(path);
1028 if (*errp) {
1029 break;
1034 g_free(dirpath);
1035 closedir(dir);
1038 /* Dispatch to functions for virtual/real device */
1039 static void build_guest_fsinfo_for_device(char const *devpath,
1040 GuestFilesystemInfo *fs,
1041 Error **errp)
1043 char *syspath = realpath(devpath, NULL);
1045 if (!syspath) {
1046 error_setg_errno(errp, errno, "realpath(\"%s\")", devpath);
1047 return;
1050 if (!fs->name) {
1051 fs->name = g_strdup(basename(syspath));
1054 g_debug(" parse sysfs path '%s'", syspath);
1056 if (strstr(syspath, "/devices/virtual/block/")) {
1057 build_guest_fsinfo_for_virtual_device(syspath, fs, errp);
1058 } else {
1059 build_guest_fsinfo_for_real_device(syspath, fs, errp);
1062 free(syspath);
1065 /* Return a list of the disk device(s)' info which @mount lies on */
1066 static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount,
1067 Error **errp)
1069 GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs));
1070 char *devpath = g_strdup_printf("/sys/dev/block/%u:%u",
1071 mount->devmajor, mount->devminor);
1073 fs->mountpoint = g_strdup(mount->dirname);
1074 fs->type = g_strdup(mount->devtype);
1075 build_guest_fsinfo_for_device(devpath, fs, errp);
1077 g_free(devpath);
1078 return fs;
1081 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
1083 FsMountList mounts;
1084 struct FsMount *mount;
1085 GuestFilesystemInfoList *new, *ret = NULL;
1086 Error *local_err = NULL;
1088 QTAILQ_INIT(&mounts);
1089 build_fs_mount_list(&mounts, &local_err);
1090 if (local_err) {
1091 error_propagate(errp, local_err);
1092 return NULL;
1095 QTAILQ_FOREACH(mount, &mounts, next) {
1096 g_debug("Building guest fsinfo for '%s'", mount->dirname);
1098 new = g_malloc0(sizeof(*ret));
1099 new->value = build_guest_fsinfo(mount, &local_err);
1100 new->next = ret;
1101 ret = new;
1102 if (local_err) {
1103 error_propagate(errp, local_err);
1104 qapi_free_GuestFilesystemInfoList(ret);
1105 ret = NULL;
1106 break;
1110 free_fs_mount_list(&mounts);
1111 return ret;
1115 typedef enum {
1116 FSFREEZE_HOOK_THAW = 0,
1117 FSFREEZE_HOOK_FREEZE,
1118 } FsfreezeHookArg;
1120 static const char *fsfreeze_hook_arg_string[] = {
1121 "thaw",
1122 "freeze",
1125 static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **errp)
1127 int status;
1128 pid_t pid;
1129 const char *hook;
1130 const char *arg_str = fsfreeze_hook_arg_string[arg];
1131 Error *local_err = NULL;
1133 hook = ga_fsfreeze_hook(ga_state);
1134 if (!hook) {
1135 return;
1137 if (access(hook, X_OK) != 0) {
1138 error_setg_errno(errp, errno, "can't access fsfreeze hook '%s'", hook);
1139 return;
1142 slog("executing fsfreeze hook with arg '%s'", arg_str);
1143 pid = fork();
1144 if (pid == 0) {
1145 setsid();
1146 reopen_fd_to_null(0);
1147 reopen_fd_to_null(1);
1148 reopen_fd_to_null(2);
1150 execle(hook, hook, arg_str, NULL, environ);
1151 _exit(EXIT_FAILURE);
1152 } else if (pid < 0) {
1153 error_setg_errno(errp, errno, "failed to create child process");
1154 return;
1157 ga_wait_child(pid, &status, &local_err);
1158 if (local_err) {
1159 error_propagate(errp, local_err);
1160 return;
1163 if (!WIFEXITED(status)) {
1164 error_setg(errp, "fsfreeze hook has terminated abnormally");
1165 return;
1168 status = WEXITSTATUS(status);
1169 if (status) {
1170 error_setg(errp, "fsfreeze hook has failed with status %d", status);
1171 return;
1176 * Return status of freeze/thaw
1178 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
1180 if (ga_is_frozen(ga_state)) {
1181 return GUEST_FSFREEZE_STATUS_FROZEN;
1184 return GUEST_FSFREEZE_STATUS_THAWED;
1187 int64_t qmp_guest_fsfreeze_freeze(Error **errp)
1189 return qmp_guest_fsfreeze_freeze_list(false, NULL, errp);
1193 * Walk list of mounted file systems in the guest, and freeze the ones which
1194 * are real local file systems.
1196 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
1197 strList *mountpoints,
1198 Error **errp)
1200 int ret = 0, i = 0;
1201 strList *list;
1202 FsMountList mounts;
1203 struct FsMount *mount;
1204 Error *local_err = NULL;
1205 int fd;
1207 slog("guest-fsfreeze called");
1209 execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err);
1210 if (local_err) {
1211 error_propagate(errp, local_err);
1212 return -1;
1215 QTAILQ_INIT(&mounts);
1216 build_fs_mount_list(&mounts, &local_err);
1217 if (local_err) {
1218 error_propagate(errp, local_err);
1219 return -1;
1222 /* cannot risk guest agent blocking itself on a write in this state */
1223 ga_set_frozen(ga_state);
1225 QTAILQ_FOREACH_REVERSE(mount, &mounts, FsMountList, next) {
1226 /* To issue fsfreeze in the reverse order of mounts, check if the
1227 * mount is listed in the list here */
1228 if (has_mountpoints) {
1229 for (list = mountpoints; list; list = list->next) {
1230 if (strcmp(list->value, mount->dirname) == 0) {
1231 break;
1234 if (!list) {
1235 continue;
1239 fd = qemu_open(mount->dirname, O_RDONLY);
1240 if (fd == -1) {
1241 error_setg_errno(errp, errno, "failed to open %s", mount->dirname);
1242 goto error;
1245 /* we try to cull filesystems we know won't work in advance, but other
1246 * filesystems may not implement fsfreeze for less obvious reasons.
1247 * these will report EOPNOTSUPP. we simply ignore these when tallying
1248 * the number of frozen filesystems.
1249 * if a filesystem is mounted more than once (aka bind mount) a
1250 * consecutive attempt to freeze an already frozen filesystem will
1251 * return EBUSY.
1253 * any other error means a failure to freeze a filesystem we
1254 * expect to be freezable, so return an error in those cases
1255 * and return system to thawed state.
1257 ret = ioctl(fd, FIFREEZE);
1258 if (ret == -1) {
1259 if (errno != EOPNOTSUPP && errno != EBUSY) {
1260 error_setg_errno(errp, errno, "failed to freeze %s",
1261 mount->dirname);
1262 close(fd);
1263 goto error;
1265 } else {
1266 i++;
1268 close(fd);
1271 free_fs_mount_list(&mounts);
1272 return i;
1274 error:
1275 free_fs_mount_list(&mounts);
1276 qmp_guest_fsfreeze_thaw(NULL);
1277 return 0;
1281 * Walk list of frozen file systems in the guest, and thaw them.
1283 int64_t qmp_guest_fsfreeze_thaw(Error **errp)
1285 int ret;
1286 FsMountList mounts;
1287 FsMount *mount;
1288 int fd, i = 0, logged;
1289 Error *local_err = NULL;
1291 QTAILQ_INIT(&mounts);
1292 build_fs_mount_list(&mounts, &local_err);
1293 if (local_err) {
1294 error_propagate(errp, local_err);
1295 return 0;
1298 QTAILQ_FOREACH(mount, &mounts, next) {
1299 logged = false;
1300 fd = qemu_open(mount->dirname, O_RDONLY);
1301 if (fd == -1) {
1302 continue;
1304 /* we have no way of knowing whether a filesystem was actually unfrozen
1305 * as a result of a successful call to FITHAW, only that if an error
1306 * was returned the filesystem was *not* unfrozen by that particular
1307 * call.
1309 * since multiple preceding FIFREEZEs require multiple calls to FITHAW
1310 * to unfreeze, continuing issuing FITHAW until an error is returned,
1311 * in which case either the filesystem is in an unfreezable state, or,
1312 * more likely, it was thawed previously (and remains so afterward).
1314 * also, since the most recent successful call is the one that did
1315 * the actual unfreeze, we can use this to provide an accurate count
1316 * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which
1317 * may * be useful for determining whether a filesystem was unfrozen
1318 * during the freeze/thaw phase by a process other than qemu-ga.
1320 do {
1321 ret = ioctl(fd, FITHAW);
1322 if (ret == 0 && !logged) {
1323 i++;
1324 logged = true;
1326 } while (ret == 0);
1327 close(fd);
1330 ga_unset_frozen(ga_state);
1331 free_fs_mount_list(&mounts);
1333 execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, errp);
1335 return i;
1338 static void guest_fsfreeze_cleanup(void)
1340 Error *err = NULL;
1342 if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) {
1343 qmp_guest_fsfreeze_thaw(&err);
1344 if (err) {
1345 slog("failed to clean up frozen filesystems: %s",
1346 error_get_pretty(err));
1347 error_free(err);
1351 #endif /* CONFIG_FSFREEZE */
1353 #if defined(CONFIG_FSTRIM)
1355 * Walk list of mounted file systems in the guest, and trim them.
1357 GuestFilesystemTrimResponse *
1358 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
1360 GuestFilesystemTrimResponse *response;
1361 GuestFilesystemTrimResultList *list;
1362 GuestFilesystemTrimResult *result;
1363 int ret = 0;
1364 FsMountList mounts;
1365 struct FsMount *mount;
1366 int fd;
1367 Error *local_err = NULL;
1368 struct fstrim_range r;
1370 slog("guest-fstrim called");
1372 QTAILQ_INIT(&mounts);
1373 build_fs_mount_list(&mounts, &local_err);
1374 if (local_err) {
1375 error_propagate(errp, local_err);
1376 return NULL;
1379 response = g_malloc0(sizeof(*response));
1381 QTAILQ_FOREACH(mount, &mounts, next) {
1382 result = g_malloc0(sizeof(*result));
1383 result->path = g_strdup(mount->dirname);
1385 list = g_malloc0(sizeof(*list));
1386 list->value = result;
1387 list->next = response->paths;
1388 response->paths = list;
1390 fd = qemu_open(mount->dirname, O_RDONLY);
1391 if (fd == -1) {
1392 result->error = g_strdup_printf("failed to open: %s",
1393 strerror(errno));
1394 result->has_error = true;
1395 continue;
1398 /* We try to cull filesystems we know won't work in advance, but other
1399 * filesystems may not implement fstrim for less obvious reasons.
1400 * These will report EOPNOTSUPP; while in some other cases ENOTTY
1401 * will be reported (e.g. CD-ROMs).
1402 * Any other error means an unexpected error.
1404 r.start = 0;
1405 r.len = -1;
1406 r.minlen = has_minimum ? minimum : 0;
1407 ret = ioctl(fd, FITRIM, &r);
1408 if (ret == -1) {
1409 result->has_error = true;
1410 if (errno == ENOTTY || errno == EOPNOTSUPP) {
1411 result->error = g_strdup("trim not supported");
1412 } else {
1413 result->error = g_strdup_printf("failed to trim: %s",
1414 strerror(errno));
1416 close(fd);
1417 continue;
1420 result->has_minimum = true;
1421 result->minimum = r.minlen;
1422 result->has_trimmed = true;
1423 result->trimmed = r.len;
1424 close(fd);
1427 free_fs_mount_list(&mounts);
1428 return response;
1430 #endif /* CONFIG_FSTRIM */
1433 #define LINUX_SYS_STATE_FILE "/sys/power/state"
1434 #define SUSPEND_SUPPORTED 0
1435 #define SUSPEND_NOT_SUPPORTED 1
1437 static void bios_supports_mode(const char *pmutils_bin, const char *pmutils_arg,
1438 const char *sysfile_str, Error **errp)
1440 Error *local_err = NULL;
1441 char *pmutils_path;
1442 pid_t pid;
1443 int status;
1445 pmutils_path = g_find_program_in_path(pmutils_bin);
1447 pid = fork();
1448 if (!pid) {
1449 char buf[32]; /* hopefully big enough */
1450 ssize_t ret;
1451 int fd;
1453 setsid();
1454 reopen_fd_to_null(0);
1455 reopen_fd_to_null(1);
1456 reopen_fd_to_null(2);
1458 if (pmutils_path) {
1459 execle(pmutils_path, pmutils_bin, pmutils_arg, NULL, environ);
1463 * If we get here either pm-utils is not installed or execle() has
1464 * failed. Let's try the manual method if the caller wants it.
1467 if (!sysfile_str) {
1468 _exit(SUSPEND_NOT_SUPPORTED);
1471 fd = open(LINUX_SYS_STATE_FILE, O_RDONLY);
1472 if (fd < 0) {
1473 _exit(SUSPEND_NOT_SUPPORTED);
1476 ret = read(fd, buf, sizeof(buf)-1);
1477 if (ret <= 0) {
1478 _exit(SUSPEND_NOT_SUPPORTED);
1480 buf[ret] = '\0';
1482 if (strstr(buf, sysfile_str)) {
1483 _exit(SUSPEND_SUPPORTED);
1486 _exit(SUSPEND_NOT_SUPPORTED);
1487 } else if (pid < 0) {
1488 error_setg_errno(errp, errno, "failed to create child process");
1489 goto out;
1492 ga_wait_child(pid, &status, &local_err);
1493 if (local_err) {
1494 error_propagate(errp, local_err);
1495 goto out;
1498 if (!WIFEXITED(status)) {
1499 error_setg(errp, "child process has terminated abnormally");
1500 goto out;
1503 switch (WEXITSTATUS(status)) {
1504 case SUSPEND_SUPPORTED:
1505 goto out;
1506 case SUSPEND_NOT_SUPPORTED:
1507 error_setg(errp,
1508 "the requested suspend mode is not supported by the guest");
1509 goto out;
1510 default:
1511 error_setg(errp,
1512 "the helper program '%s' returned an unexpected exit status"
1513 " code (%d)", pmutils_path, WEXITSTATUS(status));
1514 goto out;
1517 out:
1518 g_free(pmutils_path);
1521 static void guest_suspend(const char *pmutils_bin, const char *sysfile_str,
1522 Error **errp)
1524 Error *local_err = NULL;
1525 char *pmutils_path;
1526 pid_t pid;
1527 int status;
1529 pmutils_path = g_find_program_in_path(pmutils_bin);
1531 pid = fork();
1532 if (pid == 0) {
1533 /* child */
1534 int fd;
1536 setsid();
1537 reopen_fd_to_null(0);
1538 reopen_fd_to_null(1);
1539 reopen_fd_to_null(2);
1541 if (pmutils_path) {
1542 execle(pmutils_path, pmutils_bin, NULL, environ);
1546 * If we get here either pm-utils is not installed or execle() has
1547 * failed. Let's try the manual method if the caller wants it.
1550 if (!sysfile_str) {
1551 _exit(EXIT_FAILURE);
1554 fd = open(LINUX_SYS_STATE_FILE, O_WRONLY);
1555 if (fd < 0) {
1556 _exit(EXIT_FAILURE);
1559 if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) {
1560 _exit(EXIT_FAILURE);
1563 _exit(EXIT_SUCCESS);
1564 } else if (pid < 0) {
1565 error_setg_errno(errp, errno, "failed to create child process");
1566 goto out;
1569 ga_wait_child(pid, &status, &local_err);
1570 if (local_err) {
1571 error_propagate(errp, local_err);
1572 goto out;
1575 if (!WIFEXITED(status)) {
1576 error_setg(errp, "child process has terminated abnormally");
1577 goto out;
1580 if (WEXITSTATUS(status)) {
1581 error_setg(errp, "child process has failed to suspend");
1582 goto out;
1585 out:
1586 g_free(pmutils_path);
1589 void qmp_guest_suspend_disk(Error **errp)
1591 Error *local_err = NULL;
1593 bios_supports_mode("pm-is-supported", "--hibernate", "disk", &local_err);
1594 if (local_err) {
1595 error_propagate(errp, local_err);
1596 return;
1599 guest_suspend("pm-hibernate", "disk", errp);
1602 void qmp_guest_suspend_ram(Error **errp)
1604 Error *local_err = NULL;
1606 bios_supports_mode("pm-is-supported", "--suspend", "mem", &local_err);
1607 if (local_err) {
1608 error_propagate(errp, local_err);
1609 return;
1612 guest_suspend("pm-suspend", "mem", errp);
1615 void qmp_guest_suspend_hybrid(Error **errp)
1617 Error *local_err = NULL;
1619 bios_supports_mode("pm-is-supported", "--suspend-hybrid", NULL,
1620 &local_err);
1621 if (local_err) {
1622 error_propagate(errp, local_err);
1623 return;
1626 guest_suspend("pm-suspend-hybrid", NULL, errp);
1629 static GuestNetworkInterfaceList *
1630 guest_find_interface(GuestNetworkInterfaceList *head,
1631 const char *name)
1633 for (; head; head = head->next) {
1634 if (strcmp(head->value->name, name) == 0) {
1635 break;
1639 return head;
1643 * Build information about guest interfaces
1645 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
1647 GuestNetworkInterfaceList *head = NULL, *cur_item = NULL;
1648 struct ifaddrs *ifap, *ifa;
1650 if (getifaddrs(&ifap) < 0) {
1651 error_setg_errno(errp, errno, "getifaddrs failed");
1652 goto error;
1655 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1656 GuestNetworkInterfaceList *info;
1657 GuestIpAddressList **address_list = NULL, *address_item = NULL;
1658 char addr4[INET_ADDRSTRLEN];
1659 char addr6[INET6_ADDRSTRLEN];
1660 int sock;
1661 struct ifreq ifr;
1662 unsigned char *mac_addr;
1663 void *p;
1665 g_debug("Processing %s interface", ifa->ifa_name);
1667 info = guest_find_interface(head, ifa->ifa_name);
1669 if (!info) {
1670 info = g_malloc0(sizeof(*info));
1671 info->value = g_malloc0(sizeof(*info->value));
1672 info->value->name = g_strdup(ifa->ifa_name);
1674 if (!cur_item) {
1675 head = cur_item = info;
1676 } else {
1677 cur_item->next = info;
1678 cur_item = info;
1682 if (!info->value->has_hardware_address &&
1683 ifa->ifa_flags & SIOCGIFHWADDR) {
1684 /* we haven't obtained HW address yet */
1685 sock = socket(PF_INET, SOCK_STREAM, 0);
1686 if (sock == -1) {
1687 error_setg_errno(errp, errno, "failed to create socket");
1688 goto error;
1691 memset(&ifr, 0, sizeof(ifr));
1692 pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->value->name);
1693 if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) {
1694 error_setg_errno(errp, errno,
1695 "failed to get MAC address of %s",
1696 ifa->ifa_name);
1697 close(sock);
1698 goto error;
1701 close(sock);
1702 mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data;
1704 info->value->hardware_address =
1705 g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x",
1706 (int) mac_addr[0], (int) mac_addr[1],
1707 (int) mac_addr[2], (int) mac_addr[3],
1708 (int) mac_addr[4], (int) mac_addr[5]);
1710 info->value->has_hardware_address = true;
1713 if (ifa->ifa_addr &&
1714 ifa->ifa_addr->sa_family == AF_INET) {
1715 /* interface with IPv4 address */
1716 p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
1717 if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) {
1718 error_setg_errno(errp, errno, "inet_ntop failed");
1719 goto error;
1722 address_item = g_malloc0(sizeof(*address_item));
1723 address_item->value = g_malloc0(sizeof(*address_item->value));
1724 address_item->value->ip_address = g_strdup(addr4);
1725 address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4;
1727 if (ifa->ifa_netmask) {
1728 /* Count the number of set bits in netmask.
1729 * This is safe as '1' and '0' cannot be shuffled in netmask. */
1730 p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr;
1731 address_item->value->prefix = ctpop32(((uint32_t *) p)[0]);
1733 } else if (ifa->ifa_addr &&
1734 ifa->ifa_addr->sa_family == AF_INET6) {
1735 /* interface with IPv6 address */
1736 p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
1737 if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) {
1738 error_setg_errno(errp, errno, "inet_ntop failed");
1739 goto error;
1742 address_item = g_malloc0(sizeof(*address_item));
1743 address_item->value = g_malloc0(sizeof(*address_item->value));
1744 address_item->value->ip_address = g_strdup(addr6);
1745 address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6;
1747 if (ifa->ifa_netmask) {
1748 /* Count the number of set bits in netmask.
1749 * This is safe as '1' and '0' cannot be shuffled in netmask. */
1750 p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr;
1751 address_item->value->prefix =
1752 ctpop32(((uint32_t *) p)[0]) +
1753 ctpop32(((uint32_t *) p)[1]) +
1754 ctpop32(((uint32_t *) p)[2]) +
1755 ctpop32(((uint32_t *) p)[3]);
1759 if (!address_item) {
1760 continue;
1763 address_list = &info->value->ip_addresses;
1765 while (*address_list && (*address_list)->next) {
1766 address_list = &(*address_list)->next;
1769 if (!*address_list) {
1770 *address_list = address_item;
1771 } else {
1772 (*address_list)->next = address_item;
1775 info->value->has_ip_addresses = true;
1780 freeifaddrs(ifap);
1781 return head;
1783 error:
1784 freeifaddrs(ifap);
1785 qapi_free_GuestNetworkInterfaceList(head);
1786 return NULL;
1789 #define SYSCONF_EXACT(name, errp) sysconf_exact((name), #name, (errp))
1791 static long sysconf_exact(int name, const char *name_str, Error **errp)
1793 long ret;
1795 errno = 0;
1796 ret = sysconf(name);
1797 if (ret == -1) {
1798 if (errno == 0) {
1799 error_setg(errp, "sysconf(%s): value indefinite", name_str);
1800 } else {
1801 error_setg_errno(errp, errno, "sysconf(%s)", name_str);
1804 return ret;
1807 /* Transfer online/offline status between @vcpu and the guest system.
1809 * On input either @errp or *@errp must be NULL.
1811 * In system-to-@vcpu direction, the following @vcpu fields are accessed:
1812 * - R: vcpu->logical_id
1813 * - W: vcpu->online
1814 * - W: vcpu->can_offline
1816 * In @vcpu-to-system direction, the following @vcpu fields are accessed:
1817 * - R: vcpu->logical_id
1818 * - R: vcpu->online
1820 * Written members remain unmodified on error.
1822 static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu,
1823 Error **errp)
1825 char *dirpath;
1826 int dirfd;
1828 dirpath = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/",
1829 vcpu->logical_id);
1830 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
1831 if (dirfd == -1) {
1832 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
1833 } else {
1834 static const char fn[] = "online";
1835 int fd;
1836 int res;
1838 fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR);
1839 if (fd == -1) {
1840 if (errno != ENOENT) {
1841 error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn);
1842 } else if (sys2vcpu) {
1843 vcpu->online = true;
1844 vcpu->can_offline = false;
1845 } else if (!vcpu->online) {
1846 error_setg(errp, "logical processor #%" PRId64 " can't be "
1847 "offlined", vcpu->logical_id);
1848 } /* otherwise pretend successful re-onlining */
1849 } else {
1850 unsigned char status;
1852 res = pread(fd, &status, 1, 0);
1853 if (res == -1) {
1854 error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn);
1855 } else if (res == 0) {
1856 error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath,
1857 fn);
1858 } else if (sys2vcpu) {
1859 vcpu->online = (status != '0');
1860 vcpu->can_offline = true;
1861 } else if (vcpu->online != (status != '0')) {
1862 status = '0' + vcpu->online;
1863 if (pwrite(fd, &status, 1, 0) == -1) {
1864 error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath,
1865 fn);
1867 } /* otherwise pretend successful re-(on|off)-lining */
1869 res = close(fd);
1870 g_assert(res == 0);
1873 res = close(dirfd);
1874 g_assert(res == 0);
1877 g_free(dirpath);
1880 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
1882 int64_t current;
1883 GuestLogicalProcessorList *head, **link;
1884 long sc_max;
1885 Error *local_err = NULL;
1887 current = 0;
1888 head = NULL;
1889 link = &head;
1890 sc_max = SYSCONF_EXACT(_SC_NPROCESSORS_CONF, &local_err);
1892 while (local_err == NULL && current < sc_max) {
1893 GuestLogicalProcessor *vcpu;
1894 GuestLogicalProcessorList *entry;
1896 vcpu = g_malloc0(sizeof *vcpu);
1897 vcpu->logical_id = current++;
1898 vcpu->has_can_offline = true; /* lolspeak ftw */
1899 transfer_vcpu(vcpu, true, &local_err);
1901 entry = g_malloc0(sizeof *entry);
1902 entry->value = vcpu;
1904 *link = entry;
1905 link = &entry->next;
1908 if (local_err == NULL) {
1909 /* there's no guest with zero VCPUs */
1910 g_assert(head != NULL);
1911 return head;
1914 qapi_free_GuestLogicalProcessorList(head);
1915 error_propagate(errp, local_err);
1916 return NULL;
1919 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
1921 int64_t processed;
1922 Error *local_err = NULL;
1924 processed = 0;
1925 while (vcpus != NULL) {
1926 transfer_vcpu(vcpus->value, false, &local_err);
1927 if (local_err != NULL) {
1928 break;
1930 ++processed;
1931 vcpus = vcpus->next;
1934 if (local_err != NULL) {
1935 if (processed == 0) {
1936 error_propagate(errp, local_err);
1937 } else {
1938 error_free(local_err);
1942 return processed;
1945 void qmp_guest_set_user_password(const char *username,
1946 const char *password,
1947 bool crypted,
1948 Error **errp)
1950 Error *local_err = NULL;
1951 char *passwd_path = NULL;
1952 pid_t pid;
1953 int status;
1954 int datafd[2] = { -1, -1 };
1955 char *rawpasswddata = NULL;
1956 size_t rawpasswdlen;
1957 char *chpasswddata = NULL;
1958 size_t chpasswdlen;
1960 rawpasswddata = (char *)qbase64_decode(password, -1, &rawpasswdlen, errp);
1961 if (!rawpasswddata) {
1962 return;
1964 rawpasswddata = g_renew(char, rawpasswddata, rawpasswdlen + 1);
1965 rawpasswddata[rawpasswdlen] = '\0';
1967 if (strchr(rawpasswddata, '\n')) {
1968 error_setg(errp, "forbidden characters in raw password");
1969 goto out;
1972 if (strchr(username, '\n') ||
1973 strchr(username, ':')) {
1974 error_setg(errp, "forbidden characters in username");
1975 goto out;
1978 chpasswddata = g_strdup_printf("%s:%s\n", username, rawpasswddata);
1979 chpasswdlen = strlen(chpasswddata);
1981 passwd_path = g_find_program_in_path("chpasswd");
1983 if (!passwd_path) {
1984 error_setg(errp, "cannot find 'passwd' program in PATH");
1985 goto out;
1988 if (pipe(datafd) < 0) {
1989 error_setg(errp, "cannot create pipe FDs");
1990 goto out;
1993 pid = fork();
1994 if (pid == 0) {
1995 close(datafd[1]);
1996 /* child */
1997 setsid();
1998 dup2(datafd[0], 0);
1999 reopen_fd_to_null(1);
2000 reopen_fd_to_null(2);
2002 if (crypted) {
2003 execle(passwd_path, "chpasswd", "-e", NULL, environ);
2004 } else {
2005 execle(passwd_path, "chpasswd", NULL, environ);
2007 _exit(EXIT_FAILURE);
2008 } else if (pid < 0) {
2009 error_setg_errno(errp, errno, "failed to create child process");
2010 goto out;
2012 close(datafd[0]);
2013 datafd[0] = -1;
2015 if (qemu_write_full(datafd[1], chpasswddata, chpasswdlen) != chpasswdlen) {
2016 error_setg_errno(errp, errno, "cannot write new account password");
2017 goto out;
2019 close(datafd[1]);
2020 datafd[1] = -1;
2022 ga_wait_child(pid, &status, &local_err);
2023 if (local_err) {
2024 error_propagate(errp, local_err);
2025 goto out;
2028 if (!WIFEXITED(status)) {
2029 error_setg(errp, "child process has terminated abnormally");
2030 goto out;
2033 if (WEXITSTATUS(status)) {
2034 error_setg(errp, "child process has failed to set user password");
2035 goto out;
2038 out:
2039 g_free(chpasswddata);
2040 g_free(rawpasswddata);
2041 g_free(passwd_path);
2042 if (datafd[0] != -1) {
2043 close(datafd[0]);
2045 if (datafd[1] != -1) {
2046 close(datafd[1]);
2050 static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf,
2051 int size, Error **errp)
2053 int fd;
2054 int res;
2056 errno = 0;
2057 fd = openat(dirfd, pathname, O_RDONLY);
2058 if (fd == -1) {
2059 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname);
2060 return;
2063 res = pread(fd, buf, size, 0);
2064 if (res == -1) {
2065 error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname);
2066 } else if (res == 0) {
2067 error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname);
2069 close(fd);
2072 static void ga_write_sysfs_file(int dirfd, const char *pathname,
2073 const char *buf, int size, Error **errp)
2075 int fd;
2077 errno = 0;
2078 fd = openat(dirfd, pathname, O_WRONLY);
2079 if (fd == -1) {
2080 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname);
2081 return;
2084 if (pwrite(fd, buf, size, 0) == -1) {
2085 error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname);
2088 close(fd);
2091 /* Transfer online/offline status between @mem_blk and the guest system.
2093 * On input either @errp or *@errp must be NULL.
2095 * In system-to-@mem_blk direction, the following @mem_blk fields are accessed:
2096 * - R: mem_blk->phys_index
2097 * - W: mem_blk->online
2098 * - W: mem_blk->can_offline
2100 * In @mem_blk-to-system direction, the following @mem_blk fields are accessed:
2101 * - R: mem_blk->phys_index
2102 * - R: mem_blk->online
2103 *- R: mem_blk->can_offline
2104 * Written members remain unmodified on error.
2106 static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk,
2107 GuestMemoryBlockResponse *result,
2108 Error **errp)
2110 char *dirpath;
2111 int dirfd;
2112 char *status;
2113 Error *local_err = NULL;
2115 if (!sys2memblk) {
2116 DIR *dp;
2118 if (!result) {
2119 error_setg(errp, "Internal error, 'result' should not be NULL");
2120 return;
2122 errno = 0;
2123 dp = opendir("/sys/devices/system/memory/");
2124 /* if there is no 'memory' directory in sysfs,
2125 * we think this VM does not support online/offline memory block,
2126 * any other solution?
2128 if (!dp) {
2129 if (errno == ENOENT) {
2130 result->response =
2131 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED;
2133 goto out1;
2135 closedir(dp);
2138 dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/",
2139 mem_blk->phys_index);
2140 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2141 if (dirfd == -1) {
2142 if (sys2memblk) {
2143 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2144 } else {
2145 if (errno == ENOENT) {
2146 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND;
2147 } else {
2148 result->response =
2149 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2152 g_free(dirpath);
2153 goto out1;
2155 g_free(dirpath);
2157 status = g_malloc0(10);
2158 ga_read_sysfs_file(dirfd, "state", status, 10, &local_err);
2159 if (local_err) {
2160 /* treat with sysfs file that not exist in old kernel */
2161 if (errno == ENOENT) {
2162 error_free(local_err);
2163 if (sys2memblk) {
2164 mem_blk->online = true;
2165 mem_blk->can_offline = false;
2166 } else if (!mem_blk->online) {
2167 result->response =
2168 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED;
2170 } else {
2171 if (sys2memblk) {
2172 error_propagate(errp, local_err);
2173 } else {
2174 result->response =
2175 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2178 goto out2;
2181 if (sys2memblk) {
2182 char removable = '0';
2184 mem_blk->online = (strncmp(status, "online", 6) == 0);
2186 ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err);
2187 if (local_err) {
2188 /* if no 'removable' file, it doesn't support offline mem blk */
2189 if (errno == ENOENT) {
2190 error_free(local_err);
2191 mem_blk->can_offline = false;
2192 } else {
2193 error_propagate(errp, local_err);
2195 } else {
2196 mem_blk->can_offline = (removable != '0');
2198 } else {
2199 if (mem_blk->online != (strncmp(status, "online", 6) == 0)) {
2200 const char *new_state = mem_blk->online ? "online" : "offline";
2202 ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state),
2203 &local_err);
2204 if (local_err) {
2205 error_free(local_err);
2206 result->response =
2207 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2208 goto out2;
2211 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS;
2212 result->has_error_code = false;
2213 } /* otherwise pretend successful re-(on|off)-lining */
2215 g_free(status);
2216 close(dirfd);
2217 return;
2219 out2:
2220 g_free(status);
2221 close(dirfd);
2222 out1:
2223 if (!sys2memblk) {
2224 result->has_error_code = true;
2225 result->error_code = errno;
2229 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp)
2231 GuestMemoryBlockList *head, **link;
2232 Error *local_err = NULL;
2233 struct dirent *de;
2234 DIR *dp;
2236 head = NULL;
2237 link = &head;
2239 dp = opendir("/sys/devices/system/memory/");
2240 if (!dp) {
2241 /* it's ok if this happens to be a system that doesn't expose
2242 * memory blocks via sysfs, but otherwise we should report
2243 * an error
2245 if (errno != ENOENT) {
2246 error_setg_errno(errp, errno, "Can't open directory"
2247 "\"/sys/devices/system/memory/\"");
2249 return NULL;
2252 /* Note: the phys_index of memory block may be discontinuous,
2253 * this is because a memblk is the unit of the Sparse Memory design, which
2254 * allows discontinuous memory ranges (ex. NUMA), so here we should
2255 * traverse the memory block directory.
2257 while ((de = readdir(dp)) != NULL) {
2258 GuestMemoryBlock *mem_blk;
2259 GuestMemoryBlockList *entry;
2261 if ((strncmp(de->d_name, "memory", 6) != 0) ||
2262 !(de->d_type & DT_DIR)) {
2263 continue;
2266 mem_blk = g_malloc0(sizeof *mem_blk);
2267 /* The d_name is "memoryXXX", phys_index is block id, same as XXX */
2268 mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10);
2269 mem_blk->has_can_offline = true; /* lolspeak ftw */
2270 transfer_memory_block(mem_blk, true, NULL, &local_err);
2272 entry = g_malloc0(sizeof *entry);
2273 entry->value = mem_blk;
2275 *link = entry;
2276 link = &entry->next;
2279 closedir(dp);
2280 if (local_err == NULL) {
2281 /* there's no guest with zero memory blocks */
2282 if (head == NULL) {
2283 error_setg(errp, "guest reported zero memory blocks!");
2285 return head;
2288 qapi_free_GuestMemoryBlockList(head);
2289 error_propagate(errp, local_err);
2290 return NULL;
2293 GuestMemoryBlockResponseList *
2294 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp)
2296 GuestMemoryBlockResponseList *head, **link;
2297 Error *local_err = NULL;
2299 head = NULL;
2300 link = &head;
2302 while (mem_blks != NULL) {
2303 GuestMemoryBlockResponse *result;
2304 GuestMemoryBlockResponseList *entry;
2305 GuestMemoryBlock *current_mem_blk = mem_blks->value;
2307 result = g_malloc0(sizeof(*result));
2308 result->phys_index = current_mem_blk->phys_index;
2309 transfer_memory_block(current_mem_blk, false, result, &local_err);
2310 if (local_err) { /* should never happen */
2311 goto err;
2313 entry = g_malloc0(sizeof *entry);
2314 entry->value = result;
2316 *link = entry;
2317 link = &entry->next;
2318 mem_blks = mem_blks->next;
2321 return head;
2322 err:
2323 qapi_free_GuestMemoryBlockResponseList(head);
2324 error_propagate(errp, local_err);
2325 return NULL;
2328 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp)
2330 Error *local_err = NULL;
2331 char *dirpath;
2332 int dirfd;
2333 char *buf;
2334 GuestMemoryBlockInfo *info;
2336 dirpath = g_strdup_printf("/sys/devices/system/memory/");
2337 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2338 if (dirfd == -1) {
2339 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2340 g_free(dirpath);
2341 return NULL;
2343 g_free(dirpath);
2345 buf = g_malloc0(20);
2346 ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err);
2347 close(dirfd);
2348 if (local_err) {
2349 g_free(buf);
2350 error_propagate(errp, local_err);
2351 return NULL;
2354 info = g_new0(GuestMemoryBlockInfo, 1);
2355 info->size = strtol(buf, NULL, 16); /* the unit is bytes */
2357 g_free(buf);
2359 return info;
2362 #else /* defined(__linux__) */
2364 void qmp_guest_suspend_disk(Error **errp)
2366 error_setg(errp, QERR_UNSUPPORTED);
2369 void qmp_guest_suspend_ram(Error **errp)
2371 error_setg(errp, QERR_UNSUPPORTED);
2374 void qmp_guest_suspend_hybrid(Error **errp)
2376 error_setg(errp, QERR_UNSUPPORTED);
2379 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
2381 error_setg(errp, QERR_UNSUPPORTED);
2382 return NULL;
2385 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
2387 error_setg(errp, QERR_UNSUPPORTED);
2388 return NULL;
2391 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
2393 error_setg(errp, QERR_UNSUPPORTED);
2394 return -1;
2397 void qmp_guest_set_user_password(const char *username,
2398 const char *password,
2399 bool crypted,
2400 Error **errp)
2402 error_setg(errp, QERR_UNSUPPORTED);
2405 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp)
2407 error_setg(errp, QERR_UNSUPPORTED);
2408 return NULL;
2411 GuestMemoryBlockResponseList *
2412 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp)
2414 error_setg(errp, QERR_UNSUPPORTED);
2415 return NULL;
2418 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp)
2420 error_setg(errp, QERR_UNSUPPORTED);
2421 return NULL;
2424 #endif
2426 #if !defined(CONFIG_FSFREEZE)
2428 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
2430 error_setg(errp, QERR_UNSUPPORTED);
2431 return NULL;
2434 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
2436 error_setg(errp, QERR_UNSUPPORTED);
2438 return 0;
2441 int64_t qmp_guest_fsfreeze_freeze(Error **errp)
2443 error_setg(errp, QERR_UNSUPPORTED);
2445 return 0;
2448 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
2449 strList *mountpoints,
2450 Error **errp)
2452 error_setg(errp, QERR_UNSUPPORTED);
2454 return 0;
2457 int64_t qmp_guest_fsfreeze_thaw(Error **errp)
2459 error_setg(errp, QERR_UNSUPPORTED);
2461 return 0;
2463 #endif /* CONFIG_FSFREEZE */
2465 #if !defined(CONFIG_FSTRIM)
2466 GuestFilesystemTrimResponse *
2467 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
2469 error_setg(errp, QERR_UNSUPPORTED);
2470 return NULL;
2472 #endif
2474 /* add unsupported commands to the blacklist */
2475 GList *ga_command_blacklist_init(GList *blacklist)
2477 #if !defined(__linux__)
2479 const char *list[] = {
2480 "guest-suspend-disk", "guest-suspend-ram",
2481 "guest-suspend-hybrid", "guest-network-get-interfaces",
2482 "guest-get-vcpus", "guest-set-vcpus",
2483 "guest-get-memory-blocks", "guest-set-memory-blocks",
2484 "guest-get-memory-block-size", NULL};
2485 char **p = (char **)list;
2487 while (*p) {
2488 blacklist = g_list_append(blacklist, g_strdup(*p++));
2491 #endif
2493 #if !defined(CONFIG_FSFREEZE)
2495 const char *list[] = {
2496 "guest-get-fsinfo", "guest-fsfreeze-status",
2497 "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list",
2498 "guest-fsfreeze-thaw", "guest-get-fsinfo", NULL};
2499 char **p = (char **)list;
2501 while (*p) {
2502 blacklist = g_list_append(blacklist, g_strdup(*p++));
2505 #endif
2507 #if !defined(CONFIG_FSTRIM)
2508 blacklist = g_list_append(blacklist, g_strdup("guest-fstrim"));
2509 #endif
2511 return blacklist;
2514 /* register init/cleanup routines for stateful command groups */
2515 void ga_command_state_init(GAState *s, GACommandState *cs)
2517 #if defined(CONFIG_FSFREEZE)
2518 ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup);
2519 #endif
2522 #define QGA_MICRO_SECOND_TO_SECOND 1000000
2524 static double ga_get_login_time(struct utmpx *user_info)
2526 double seconds = (double)user_info->ut_tv.tv_sec;
2527 double useconds = (double)user_info->ut_tv.tv_usec;
2528 useconds /= QGA_MICRO_SECOND_TO_SECOND;
2529 return seconds + useconds;
2532 GuestUserList *qmp_guest_get_users(Error **err)
2534 GHashTable *cache = NULL;
2535 GuestUserList *head = NULL, *cur_item = NULL;
2536 struct utmpx *user_info = NULL;
2537 gpointer value = NULL;
2538 GuestUser *user = NULL;
2539 GuestUserList *item = NULL;
2540 double login_time = 0;
2542 cache = g_hash_table_new(g_str_hash, g_str_equal);
2543 setutxent();
2545 for (;;) {
2546 user_info = getutxent();
2547 if (user_info == NULL) {
2548 break;
2549 } else if (user_info->ut_type != USER_PROCESS) {
2550 continue;
2551 } else if (g_hash_table_contains(cache, user_info->ut_user)) {
2552 value = g_hash_table_lookup(cache, user_info->ut_user);
2553 user = (GuestUser *)value;
2554 login_time = ga_get_login_time(user_info);
2555 /* We're ensuring the earliest login time to be sent */
2556 if (login_time < user->login_time) {
2557 user->login_time = login_time;
2559 continue;
2562 item = g_new0(GuestUserList, 1);
2563 item->value = g_new0(GuestUser, 1);
2564 item->value->user = g_strdup(user_info->ut_user);
2565 item->value->login_time = ga_get_login_time(user_info);
2567 g_hash_table_insert(cache, item->value->user, item->value);
2569 if (!cur_item) {
2570 head = cur_item = item;
2571 } else {
2572 cur_item->next = item;
2573 cur_item = item;
2576 endutxent();
2577 g_hash_table_destroy(cache);
2578 return head;