2 * QEMU Guest Agent POSIX-specific command implementations
4 * Copyright IBM Corp. 2011
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/utsname.h>
19 #include "qemu-common.h"
20 #include "guest-agent-core.h"
21 #include "qga-qapi-commands.h"
22 #include "qapi/error.h"
23 #include "qapi/qmp/qerror.h"
24 #include "qemu/queue.h"
25 #include "qemu/host-utils.h"
26 #include "qemu/sockets.h"
27 #include "qemu/base64.h"
28 #include "qemu/cutils.h"
29 #include "commands-common.h"
35 #ifndef CONFIG_HAS_ENVIRON
37 #include <crt_externs.h>
38 #define environ (*_NSGetEnviron())
40 extern char **environ;
44 #if defined(__linux__)
48 #include <arpa/inet.h>
49 #include <sys/socket.h>
51 #include <sys/statvfs.h>
58 #define CONFIG_FSFREEZE
65 static void ga_wait_child(pid_t pid, int *status, Error **errp)
72 rpid = waitpid(pid, status, 0);
73 } while (rpid == -1 && errno == EINTR);
76 error_setg_errno(errp, errno, "failed to wait for child (pid: %d)",
81 g_assert(rpid == pid);
84 void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp)
86 const char *shutdown_flag;
87 Error *local_err = NULL;
91 slog("guest-shutdown called, mode: %s", mode);
92 if (!has_mode || strcmp(mode, "powerdown") == 0) {
94 } else if (strcmp(mode, "halt") == 0) {
96 } else if (strcmp(mode, "reboot") == 0) {
100 "mode is invalid (valid values are: halt|powerdown|reboot");
106 /* child, start the shutdown */
108 reopen_fd_to_null(0);
109 reopen_fd_to_null(1);
110 reopen_fd_to_null(2);
112 execle("/sbin/shutdown", "shutdown", "-h", shutdown_flag, "+0",
113 "hypervisor initiated shutdown", (char*)NULL, environ);
115 } else if (pid < 0) {
116 error_setg_errno(errp, errno, "failed to create child process");
120 ga_wait_child(pid, &status, &local_err);
122 error_propagate(errp, local_err);
126 if (!WIFEXITED(status)) {
127 error_setg(errp, "child process has terminated abnormally");
131 if (WEXITSTATUS(status)) {
132 error_setg(errp, "child process has failed to shutdown");
139 int64_t qmp_guest_get_time(Error **errp)
144 ret = qemu_gettimeofday(&tq);
146 error_setg_errno(errp, errno, "Failed to get time");
150 return tq.tv_sec * 1000000000LL + tq.tv_usec * 1000;
153 void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp)
158 Error *local_err = NULL;
160 static const char hwclock_path[] = "/sbin/hwclock";
161 static int hwclock_available = -1;
163 if (hwclock_available < 0) {
164 hwclock_available = (access(hwclock_path, X_OK) == 0);
167 if (!hwclock_available) {
168 error_setg(errp, QERR_UNSUPPORTED);
172 /* If user has passed a time, validate and set it. */
176 /* year-2038 will overflow in case time_t is 32bit */
177 if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) {
178 error_setg(errp, "Time %" PRId64 " is too large", time_ns);
182 tv.tv_sec = time_ns / 1000000000;
183 tv.tv_usec = (time_ns % 1000000000) / 1000;
184 g_date_set_time_t(&date, tv.tv_sec);
185 if (date.year < 1970 || date.year >= 2070) {
186 error_setg_errno(errp, errno, "Invalid time");
190 ret = settimeofday(&tv, NULL);
192 error_setg_errno(errp, errno, "Failed to set time to guest");
197 /* Now, if user has passed a time to set and the system time is set, we
198 * just need to synchronize the hardware clock. However, if no time was
199 * passed, user is requesting the opposite: set the system time from the
200 * hardware clock (RTC). */
204 reopen_fd_to_null(0);
205 reopen_fd_to_null(1);
206 reopen_fd_to_null(2);
208 /* Use '/sbin/hwclock -w' to set RTC from the system time,
209 * or '/sbin/hwclock -s' to set the system time from RTC. */
210 execle(hwclock_path, "hwclock", has_time ? "-w" : "-s",
213 } else if (pid < 0) {
214 error_setg_errno(errp, errno, "failed to create child process");
218 ga_wait_child(pid, &status, &local_err);
220 error_propagate(errp, local_err);
224 if (!WIFEXITED(status)) {
225 error_setg(errp, "child process has terminated abnormally");
229 if (WEXITSTATUS(status)) {
230 error_setg(errp, "hwclock failed to set hardware clock to system time");
241 struct GuestFileHandle {
245 QTAILQ_ENTRY(GuestFileHandle) next;
249 QTAILQ_HEAD(, GuestFileHandle) filehandles;
250 } guest_file_state = {
251 .filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles),
254 static int64_t guest_file_handle_add(FILE *fh, Error **errp)
256 GuestFileHandle *gfh;
259 handle = ga_get_fd_handle(ga_state, errp);
264 gfh = g_new0(GuestFileHandle, 1);
267 QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next);
272 GuestFileHandle *guest_file_handle_find(int64_t id, Error **errp)
274 GuestFileHandle *gfh;
276 QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next)
283 error_setg(errp, "handle '%" PRId64 "' has not been found", id);
287 typedef const char * const ccpc;
293 /* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */
294 static const struct {
297 } guest_file_open_modes[] = {
298 { (ccpc[]){ "r", NULL }, O_RDONLY },
299 { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY },
300 { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC },
301 { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY },
302 { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND },
303 { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY },
304 { (ccpc[]){ "r+", NULL }, O_RDWR },
305 { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY },
306 { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC },
307 { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY },
308 { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND },
309 { (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY }
313 find_open_flag(const char *mode_str, Error **errp)
317 for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) {
320 form = guest_file_open_modes[mode].forms;
321 while (*form != NULL && strcmp(*form, mode_str) != 0) {
329 if (mode == ARRAY_SIZE(guest_file_open_modes)) {
330 error_setg(errp, "invalid file open mode '%s'", mode_str);
333 return guest_file_open_modes[mode].oflag_base | O_NOCTTY | O_NONBLOCK;
336 #define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \
337 S_IRGRP | S_IWGRP | \
341 safe_open_or_create(const char *path, const char *mode, Error **errp)
343 Error *local_err = NULL;
346 oflag = find_open_flag(mode, &local_err);
347 if (local_err == NULL) {
350 /* If the caller wants / allows creation of a new file, we implement it
351 * with a two step process: open() + (open() / fchmod()).
353 * First we insist on creating the file exclusively as a new file. If
354 * that succeeds, we're free to set any file-mode bits on it. (The
355 * motivation is that we want to set those file-mode bits independently
356 * of the current umask.)
358 * If the exclusive creation fails because the file already exists
359 * (EEXIST is not possible for any other reason), we just attempt to
360 * open the file, but in this case we won't be allowed to change the
361 * file-mode bits on the preexistent file.
363 * The pathname should never disappear between the two open()s in
364 * practice. If it happens, then someone very likely tried to race us.
365 * In this case just go ahead and report the ENOENT from the second
366 * open() to the caller.
368 * If the caller wants to open a preexistent file, then the first
369 * open() is decisive and its third argument is ignored, and the second
370 * open() and the fchmod() are never called.
372 fd = open(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0);
373 if (fd == -1 && errno == EEXIST) {
374 oflag &= ~(unsigned)O_CREAT;
375 fd = open(path, oflag);
379 error_setg_errno(&local_err, errno, "failed to open file '%s' "
380 "(mode: '%s')", path, mode);
382 qemu_set_cloexec(fd);
384 if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) {
385 error_setg_errno(&local_err, errno, "failed to set permission "
386 "0%03o on new file '%s' (mode: '%s')",
387 (unsigned)DEFAULT_NEW_FILE_MODE, path, mode);
391 f = fdopen(fd, mode);
393 error_setg_errno(&local_err, errno, "failed to associate "
394 "stdio stream with file descriptor %d, "
395 "file '%s' (mode: '%s')", fd, path, mode);
402 if (oflag & O_CREAT) {
408 error_propagate(errp, local_err);
412 int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode,
416 Error *local_err = NULL;
422 slog("guest-file-open called, filepath: %s, mode: %s", path, mode);
423 fh = safe_open_or_create(path, mode, &local_err);
424 if (local_err != NULL) {
425 error_propagate(errp, local_err);
429 /* set fd non-blocking to avoid common use cases (like reading from a
430 * named pipe) from hanging the agent
432 qemu_set_nonblock(fileno(fh));
434 handle = guest_file_handle_add(fh, errp);
440 slog("guest-file-open, handle: %" PRId64, handle);
444 void qmp_guest_file_close(int64_t handle, Error **errp)
446 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
449 slog("guest-file-close called, handle: %" PRId64, handle);
454 ret = fclose(gfh->fh);
456 error_setg_errno(errp, errno, "failed to close handle");
460 QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next);
464 GuestFileRead *guest_file_read_unsafe(GuestFileHandle *gfh,
465 int64_t count, Error **errp)
467 GuestFileRead *read_data = NULL;
472 /* explicitly flush when switching from writing to reading */
473 if (gfh->state == RW_STATE_WRITING) {
474 int ret = fflush(fh);
476 error_setg_errno(errp, errno, "failed to flush file");
479 gfh->state = RW_STATE_NEW;
482 buf = g_malloc0(count+1);
483 read_count = fread(buf, 1, count, fh);
485 error_setg_errno(errp, errno, "failed to read file");
488 read_data = g_new0(GuestFileRead, 1);
489 read_data->count = read_count;
490 read_data->eof = feof(fh);
492 read_data->buf_b64 = g_base64_encode(buf, read_count);
494 gfh->state = RW_STATE_READING;
502 GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64,
503 bool has_count, int64_t count,
506 GuestFileWrite *write_data = NULL;
510 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
519 if (gfh->state == RW_STATE_READING) {
520 int ret = fseek(fh, 0, SEEK_CUR);
522 error_setg_errno(errp, errno, "failed to seek file");
525 gfh->state = RW_STATE_NEW;
528 buf = qbase64_decode(buf_b64, -1, &buf_len, errp);
535 } else if (count < 0 || count > buf_len) {
536 error_setg(errp, "value '%" PRId64 "' is invalid for argument count",
542 write_count = fwrite(buf, 1, count, fh);
544 error_setg_errno(errp, errno, "failed to write to file");
545 slog("guest-file-write failed, handle: %" PRId64, handle);
547 write_data = g_new0(GuestFileWrite, 1);
548 write_data->count = write_count;
549 write_data->eof = feof(fh);
550 gfh->state = RW_STATE_WRITING;
558 struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset,
559 GuestFileWhence *whence_code,
562 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
563 GuestFileSeek *seek_data = NULL;
573 /* We stupidly exposed 'whence':'int' in our qapi */
574 whence = ga_parse_whence(whence_code, &err);
576 error_propagate(errp, err);
581 ret = fseek(fh, offset, whence);
583 error_setg_errno(errp, errno, "failed to seek file");
584 if (errno == ESPIPE) {
585 /* file is non-seekable, stdio shouldn't be buffering anyways */
586 gfh->state = RW_STATE_NEW;
589 seek_data = g_new0(GuestFileSeek, 1);
590 seek_data->position = ftell(fh);
591 seek_data->eof = feof(fh);
592 gfh->state = RW_STATE_NEW;
599 void qmp_guest_file_flush(int64_t handle, Error **errp)
601 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
612 error_setg_errno(errp, errno, "failed to flush file");
614 gfh->state = RW_STATE_NEW;
618 /* linux-specific implementations. avoid this if at all possible. */
619 #if defined(__linux__)
621 #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM)
622 typedef struct FsMount {
625 unsigned int devmajor, devminor;
626 QTAILQ_ENTRY(FsMount) next;
629 typedef QTAILQ_HEAD(FsMountList, FsMount) FsMountList;
631 static void free_fs_mount_list(FsMountList *mounts)
633 FsMount *mount, *temp;
639 QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) {
640 QTAILQ_REMOVE(mounts, mount, next);
641 g_free(mount->dirname);
642 g_free(mount->devtype);
647 static int dev_major_minor(const char *devpath,
648 unsigned int *devmajor, unsigned int *devminor)
655 if (stat(devpath, &st) < 0) {
656 slog("failed to stat device file '%s': %s", devpath, strerror(errno));
659 if (S_ISDIR(st.st_mode)) {
660 /* It is bind mount */
663 if (S_ISBLK(st.st_mode)) {
664 *devmajor = major(st.st_rdev);
665 *devminor = minor(st.st_rdev);
672 * Walk the mount table and build a list of local file systems
674 static void build_fs_mount_list_from_mtab(FsMountList *mounts, Error **errp)
678 char const *mtab = "/proc/self/mounts";
680 unsigned int devmajor, devminor;
682 fp = setmntent(mtab, "r");
684 error_setg(errp, "failed to open mtab file: '%s'", mtab);
688 while ((ment = getmntent(fp))) {
690 * An entry which device name doesn't start with a '/' is
691 * either a dummy file system or a network file system.
692 * Add special handling for smbfs and cifs as is done by
695 if ((ment->mnt_fsname[0] != '/') ||
696 (strcmp(ment->mnt_type, "smbfs") == 0) ||
697 (strcmp(ment->mnt_type, "cifs") == 0)) {
700 if (dev_major_minor(ment->mnt_fsname, &devmajor, &devminor) == -2) {
701 /* Skip bind mounts */
705 mount = g_new0(FsMount, 1);
706 mount->dirname = g_strdup(ment->mnt_dir);
707 mount->devtype = g_strdup(ment->mnt_type);
708 mount->devmajor = devmajor;
709 mount->devminor = devminor;
711 QTAILQ_INSERT_TAIL(mounts, mount, next);
717 static void decode_mntname(char *name, int len)
720 for (i = 0; i <= len; i++) {
721 if (name[i] != '\\') {
723 } else if (name[i + 1] == '\\') {
726 } else if (name[i + 1] >= '0' && name[i + 1] <= '3' &&
727 name[i + 2] >= '0' && name[i + 2] <= '7' &&
728 name[i + 3] >= '0' && name[i + 3] <= '7') {
729 name[j++] = (name[i + 1] - '0') * 64 +
730 (name[i + 2] - '0') * 8 +
739 static void build_fs_mount_list(FsMountList *mounts, Error **errp)
742 char const *mountinfo = "/proc/self/mountinfo";
744 char *line = NULL, *dash;
747 unsigned int devmajor, devminor;
748 int ret, dir_s, dir_e, type_s, type_e, dev_s, dev_e;
750 fp = fopen(mountinfo, "r");
752 build_fs_mount_list_from_mtab(mounts, errp);
756 while (getline(&line, &n, fp) != -1) {
757 ret = sscanf(line, "%*u %*u %u:%u %*s %n%*s%n%c",
758 &devmajor, &devminor, &dir_s, &dir_e, &check);
762 dash = strstr(line + dir_e, " - ");
766 ret = sscanf(dash, " - %n%*s%n %n%*s%n%c",
767 &type_s, &type_e, &dev_s, &dev_e, &check);
774 decode_mntname(line + dir_s, dir_e - dir_s);
775 decode_mntname(dash + dev_s, dev_e - dev_s);
777 /* btrfs reports major number = 0 */
778 if (strcmp("btrfs", dash + type_s) != 0 ||
779 dev_major_minor(dash + dev_s, &devmajor, &devminor) < 0) {
784 mount = g_new0(FsMount, 1);
785 mount->dirname = g_strdup(line + dir_s);
786 mount->devtype = g_strdup(dash + type_s);
787 mount->devmajor = devmajor;
788 mount->devminor = devminor;
790 QTAILQ_INSERT_TAIL(mounts, mount, next);
798 #if defined(CONFIG_FSFREEZE)
800 static char *get_pci_driver(char const *syspath, int pathlen, Error **errp)
808 path = g_strndup(syspath, pathlen);
809 dpath = g_strdup_printf("%s/driver", path);
810 len = readlink(dpath, buf, sizeof(buf) - 1);
813 driver = g_path_get_basename(buf);
820 static int compare_uint(const void *_a, const void *_b)
822 unsigned int a = *(unsigned int *)_a;
823 unsigned int b = *(unsigned int *)_b;
825 return a < b ? -1 : a > b ? 1 : 0;
828 /* Walk the specified sysfs and build a sorted list of host or ata numbers */
829 static int build_hosts(char const *syspath, char const *host, bool ata,
830 unsigned int *hosts, int hosts_max, Error **errp)
834 struct dirent *entry;
837 path = g_strndup(syspath, host - syspath);
840 error_setg_errno(errp, errno, "opendir(\"%s\")", path);
845 while (i < hosts_max) {
846 entry = readdir(dir);
850 if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) {
852 } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) {
857 qsort(hosts, i, sizeof(hosts[0]), compare_uint);
864 /* Store disk device info specified by @sysfs into @fs */
865 static void build_guest_fsinfo_for_real_device(char const *syspath,
866 GuestFilesystemInfo *fs,
869 unsigned int pci[4], host, hosts[8], tgt[3];
870 int i, nhosts = 0, pcilen;
871 GuestDiskAddress *disk;
872 GuestPCIAddress *pciaddr;
873 GuestDiskAddressList *list = NULL;
874 bool has_ata = false, has_host = false, has_tgt = false;
875 char *p, *q, *driver = NULL;
876 #ifdef CONFIG_LIBUDEV
877 struct udev *udev = NULL;
878 struct udev_device *udevice = NULL;
881 p = strstr(syspath, "/devices/pci");
882 if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n",
883 pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) {
884 g_debug("only pci device is supported: sysfs path '%s'", syspath);
890 driver = get_pci_driver(syspath, p - syspath, errp);
891 if (driver && (g_str_equal(driver, "ata_piix") ||
892 g_str_equal(driver, "sym53c8xx") ||
893 g_str_equal(driver, "virtio-pci") ||
894 g_str_equal(driver, "ahci"))) {
899 if (sscanf(p, "/%x:%x:%x.%x%n",
900 pci, pci + 1, pci + 2, pci + 3, &pcilen) == 4) {
905 g_debug("unsupported driver or sysfs path '%s'", syspath);
909 p = strstr(syspath, "/target");
910 if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u",
911 tgt, tgt + 1, tgt + 2) == 3) {
915 p = strstr(syspath, "/ata");
920 p = strstr(syspath, "/host");
923 if (p && sscanf(q, "%u", &host) == 1) {
925 nhosts = build_hosts(syspath, p, has_ata, hosts,
926 ARRAY_SIZE(hosts), errp);
932 pciaddr = g_malloc0(sizeof(*pciaddr));
933 pciaddr->domain = pci[0];
934 pciaddr->bus = pci[1];
935 pciaddr->slot = pci[2];
936 pciaddr->function = pci[3];
938 disk = g_malloc0(sizeof(*disk));
939 disk->pci_controller = pciaddr;
941 list = g_malloc0(sizeof(*list));
944 #ifdef CONFIG_LIBUDEV
946 udevice = udev_device_new_from_syspath(udev, syspath);
947 if (udev == NULL || udevice == NULL) {
948 g_debug("failed to query udev");
950 const char *devnode, *serial;
951 devnode = udev_device_get_devnode(udevice);
952 if (devnode != NULL) {
953 disk->dev = g_strdup(devnode);
954 disk->has_dev = true;
956 serial = udev_device_get_property_value(udevice, "ID_SERIAL");
957 if (serial != NULL && *serial != 0) {
958 disk->serial = g_strdup(serial);
959 disk->has_serial = true;
964 if (strcmp(driver, "ata_piix") == 0) {
965 /* a host per ide bus, target*:0:<unit>:0 */
966 if (!has_host || !has_tgt) {
967 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
970 for (i = 0; i < nhosts; i++) {
971 if (host == hosts[i]) {
972 disk->bus_type = GUEST_DISK_BUS_TYPE_IDE;
979 g_debug("no host for '%s' (driver '%s')", syspath, driver);
982 } else if (strcmp(driver, "sym53c8xx") == 0) {
983 /* scsi(LSI Logic): target*:0:<unit>:0 */
985 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
988 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
990 } else if (strcmp(driver, "virtio-pci") == 0) {
992 /* virtio-scsi: target*:0:0:<unit> */
993 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
996 /* virtio-blk: 1 disk per 1 device */
997 disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO;
999 } else if (strcmp(driver, "ahci") == 0) {
1000 /* ahci: 1 host per 1 unit */
1001 if (!has_host || !has_tgt) {
1002 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
1005 for (i = 0; i < nhosts; i++) {
1006 if (host == hosts[i]) {
1008 disk->bus_type = GUEST_DISK_BUS_TYPE_SATA;
1013 g_debug("no host for '%s' (driver '%s')", syspath, driver);
1017 g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath);
1021 list->next = fs->disk;
1027 qapi_free_GuestDiskAddressList(list);
1031 #ifdef CONFIG_LIBUDEV
1033 udev_device_unref(udevice);
1038 static void build_guest_fsinfo_for_device(char const *devpath,
1039 GuestFilesystemInfo *fs,
1042 /* Store a list of slave devices of virtual volume specified by @syspath into
1044 static void build_guest_fsinfo_for_virtual_device(char const *syspath,
1045 GuestFilesystemInfo *fs,
1051 struct dirent *entry;
1053 dirpath = g_strdup_printf("%s/slaves", syspath);
1054 dir = opendir(dirpath);
1056 if (errno != ENOENT) {
1057 error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath);
1065 entry = readdir(dir);
1066 if (entry == NULL) {
1068 error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath);
1073 if (entry->d_type == DT_LNK) {
1076 g_debug(" slave device '%s'", entry->d_name);
1077 path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name);
1078 build_guest_fsinfo_for_device(path, fs, &err);
1082 error_propagate(errp, err);
1092 /* Dispatch to functions for virtual/real device */
1093 static void build_guest_fsinfo_for_device(char const *devpath,
1094 GuestFilesystemInfo *fs,
1097 char *syspath = realpath(devpath, NULL);
1100 error_setg_errno(errp, errno, "realpath(\"%s\")", devpath);
1105 fs->name = g_path_get_basename(syspath);
1108 g_debug(" parse sysfs path '%s'", syspath);
1110 if (strstr(syspath, "/devices/virtual/block/")) {
1111 build_guest_fsinfo_for_virtual_device(syspath, fs, errp);
1113 build_guest_fsinfo_for_real_device(syspath, fs, errp);
1119 /* Return a list of the disk device(s)' info which @mount lies on */
1120 static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount,
1123 GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs));
1125 unsigned long used, nonroot_total, fr_size;
1126 char *devpath = g_strdup_printf("/sys/dev/block/%u:%u",
1127 mount->devmajor, mount->devminor);
1129 fs->mountpoint = g_strdup(mount->dirname);
1130 fs->type = g_strdup(mount->devtype);
1131 build_guest_fsinfo_for_device(devpath, fs, errp);
1133 if (statvfs(fs->mountpoint, &buf) == 0) {
1134 fr_size = buf.f_frsize;
1135 used = buf.f_blocks - buf.f_bfree;
1136 nonroot_total = used + buf.f_bavail;
1137 fs->used_bytes = used * fr_size;
1138 fs->total_bytes = nonroot_total * fr_size;
1140 fs->has_total_bytes = true;
1141 fs->has_used_bytes = true;
1149 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
1152 struct FsMount *mount;
1153 GuestFilesystemInfoList *new, *ret = NULL;
1154 Error *local_err = NULL;
1156 QTAILQ_INIT(&mounts);
1157 build_fs_mount_list(&mounts, &local_err);
1159 error_propagate(errp, local_err);
1163 QTAILQ_FOREACH(mount, &mounts, next) {
1164 g_debug("Building guest fsinfo for '%s'", mount->dirname);
1166 new = g_malloc0(sizeof(*ret));
1167 new->value = build_guest_fsinfo(mount, &local_err);
1171 error_propagate(errp, local_err);
1172 qapi_free_GuestFilesystemInfoList(ret);
1178 free_fs_mount_list(&mounts);
1184 FSFREEZE_HOOK_THAW = 0,
1185 FSFREEZE_HOOK_FREEZE,
1188 static const char *fsfreeze_hook_arg_string[] = {
1193 static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **errp)
1198 const char *arg_str = fsfreeze_hook_arg_string[arg];
1199 Error *local_err = NULL;
1201 hook = ga_fsfreeze_hook(ga_state);
1205 if (access(hook, X_OK) != 0) {
1206 error_setg_errno(errp, errno, "can't access fsfreeze hook '%s'", hook);
1210 slog("executing fsfreeze hook with arg '%s'", arg_str);
1214 reopen_fd_to_null(0);
1215 reopen_fd_to_null(1);
1216 reopen_fd_to_null(2);
1218 execle(hook, hook, arg_str, NULL, environ);
1219 _exit(EXIT_FAILURE);
1220 } else if (pid < 0) {
1221 error_setg_errno(errp, errno, "failed to create child process");
1225 ga_wait_child(pid, &status, &local_err);
1227 error_propagate(errp, local_err);
1231 if (!WIFEXITED(status)) {
1232 error_setg(errp, "fsfreeze hook has terminated abnormally");
1236 status = WEXITSTATUS(status);
1238 error_setg(errp, "fsfreeze hook has failed with status %d", status);
1244 * Return status of freeze/thaw
1246 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
1248 if (ga_is_frozen(ga_state)) {
1249 return GUEST_FSFREEZE_STATUS_FROZEN;
1252 return GUEST_FSFREEZE_STATUS_THAWED;
1255 int64_t qmp_guest_fsfreeze_freeze(Error **errp)
1257 return qmp_guest_fsfreeze_freeze_list(false, NULL, errp);
1261 * Walk list of mounted file systems in the guest, and freeze the ones which
1262 * are real local file systems.
1264 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
1265 strList *mountpoints,
1271 struct FsMount *mount;
1272 Error *local_err = NULL;
1275 slog("guest-fsfreeze called");
1277 execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err);
1279 error_propagate(errp, local_err);
1283 QTAILQ_INIT(&mounts);
1284 build_fs_mount_list(&mounts, &local_err);
1286 error_propagate(errp, local_err);
1290 /* cannot risk guest agent blocking itself on a write in this state */
1291 ga_set_frozen(ga_state);
1293 QTAILQ_FOREACH_REVERSE(mount, &mounts, next) {
1294 /* To issue fsfreeze in the reverse order of mounts, check if the
1295 * mount is listed in the list here */
1296 if (has_mountpoints) {
1297 for (list = mountpoints; list; list = list->next) {
1298 if (strcmp(list->value, mount->dirname) == 0) {
1307 fd = qemu_open(mount->dirname, O_RDONLY);
1309 error_setg_errno(errp, errno, "failed to open %s", mount->dirname);
1313 /* we try to cull filesystems we know won't work in advance, but other
1314 * filesystems may not implement fsfreeze for less obvious reasons.
1315 * these will report EOPNOTSUPP. we simply ignore these when tallying
1316 * the number of frozen filesystems.
1317 * if a filesystem is mounted more than once (aka bind mount) a
1318 * consecutive attempt to freeze an already frozen filesystem will
1321 * any other error means a failure to freeze a filesystem we
1322 * expect to be freezable, so return an error in those cases
1323 * and return system to thawed state.
1325 ret = ioctl(fd, FIFREEZE);
1327 if (errno != EOPNOTSUPP && errno != EBUSY) {
1328 error_setg_errno(errp, errno, "failed to freeze %s",
1339 free_fs_mount_list(&mounts);
1340 /* We may not issue any FIFREEZE here.
1341 * Just unset ga_state here and ready for the next call.
1344 ga_unset_frozen(ga_state);
1349 free_fs_mount_list(&mounts);
1350 qmp_guest_fsfreeze_thaw(NULL);
1355 * Walk list of frozen file systems in the guest, and thaw them.
1357 int64_t qmp_guest_fsfreeze_thaw(Error **errp)
1362 int fd, i = 0, logged;
1363 Error *local_err = NULL;
1365 QTAILQ_INIT(&mounts);
1366 build_fs_mount_list(&mounts, &local_err);
1368 error_propagate(errp, local_err);
1372 QTAILQ_FOREACH(mount, &mounts, next) {
1374 fd = qemu_open(mount->dirname, O_RDONLY);
1378 /* we have no way of knowing whether a filesystem was actually unfrozen
1379 * as a result of a successful call to FITHAW, only that if an error
1380 * was returned the filesystem was *not* unfrozen by that particular
1383 * since multiple preceding FIFREEZEs require multiple calls to FITHAW
1384 * to unfreeze, continuing issuing FITHAW until an error is returned,
1385 * in which case either the filesystem is in an unfreezable state, or,
1386 * more likely, it was thawed previously (and remains so afterward).
1388 * also, since the most recent successful call is the one that did
1389 * the actual unfreeze, we can use this to provide an accurate count
1390 * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which
1391 * may * be useful for determining whether a filesystem was unfrozen
1392 * during the freeze/thaw phase by a process other than qemu-ga.
1395 ret = ioctl(fd, FITHAW);
1396 if (ret == 0 && !logged) {
1404 ga_unset_frozen(ga_state);
1405 free_fs_mount_list(&mounts);
1407 execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, errp);
1412 static void guest_fsfreeze_cleanup(void)
1416 if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) {
1417 qmp_guest_fsfreeze_thaw(&err);
1419 slog("failed to clean up frozen filesystems: %s",
1420 error_get_pretty(err));
1425 #endif /* CONFIG_FSFREEZE */
1427 #if defined(CONFIG_FSTRIM)
1429 * Walk list of mounted file systems in the guest, and trim them.
1431 GuestFilesystemTrimResponse *
1432 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
1434 GuestFilesystemTrimResponse *response;
1435 GuestFilesystemTrimResultList *list;
1436 GuestFilesystemTrimResult *result;
1439 struct FsMount *mount;
1441 Error *local_err = NULL;
1442 struct fstrim_range r;
1444 slog("guest-fstrim called");
1446 QTAILQ_INIT(&mounts);
1447 build_fs_mount_list(&mounts, &local_err);
1449 error_propagate(errp, local_err);
1453 response = g_malloc0(sizeof(*response));
1455 QTAILQ_FOREACH(mount, &mounts, next) {
1456 result = g_malloc0(sizeof(*result));
1457 result->path = g_strdup(mount->dirname);
1459 list = g_malloc0(sizeof(*list));
1460 list->value = result;
1461 list->next = response->paths;
1462 response->paths = list;
1464 fd = qemu_open(mount->dirname, O_RDONLY);
1466 result->error = g_strdup_printf("failed to open: %s",
1468 result->has_error = true;
1472 /* We try to cull filesystems we know won't work in advance, but other
1473 * filesystems may not implement fstrim for less obvious reasons.
1474 * These will report EOPNOTSUPP; while in some other cases ENOTTY
1475 * will be reported (e.g. CD-ROMs).
1476 * Any other error means an unexpected error.
1480 r.minlen = has_minimum ? minimum : 0;
1481 ret = ioctl(fd, FITRIM, &r);
1483 result->has_error = true;
1484 if (errno == ENOTTY || errno == EOPNOTSUPP) {
1485 result->error = g_strdup("trim not supported");
1487 result->error = g_strdup_printf("failed to trim: %s",
1494 result->has_minimum = true;
1495 result->minimum = r.minlen;
1496 result->has_trimmed = true;
1497 result->trimmed = r.len;
1501 free_fs_mount_list(&mounts);
1504 #endif /* CONFIG_FSTRIM */
1507 #define LINUX_SYS_STATE_FILE "/sys/power/state"
1508 #define SUSPEND_SUPPORTED 0
1509 #define SUSPEND_NOT_SUPPORTED 1
1512 SUSPEND_MODE_DISK = 0,
1513 SUSPEND_MODE_RAM = 1,
1514 SUSPEND_MODE_HYBRID = 2,
1518 * Executes a command in a child process using g_spawn_sync,
1519 * returning an int >= 0 representing the exit status of the
1522 * If the program wasn't found in path, returns -1.
1524 * If a problem happened when creating the child process,
1525 * returns -1 and errp is set.
1527 static int run_process_child(const char *command[], Error **errp)
1529 int exit_status, spawn_flag;
1530 GError *g_err = NULL;
1533 spawn_flag = G_SPAWN_SEARCH_PATH | G_SPAWN_STDOUT_TO_DEV_NULL |
1534 G_SPAWN_STDERR_TO_DEV_NULL;
1536 success = g_spawn_sync(NULL, (char **)command, environ, spawn_flag,
1537 NULL, NULL, NULL, NULL,
1538 &exit_status, &g_err);
1541 return WEXITSTATUS(exit_status);
1544 if (g_err && (g_err->code != G_SPAWN_ERROR_NOENT)) {
1545 error_setg(errp, "failed to create child process, error '%s'",
1549 g_error_free(g_err);
1553 static bool systemd_supports_mode(SuspendMode mode, Error **errp)
1555 Error *local_err = NULL;
1556 const char *systemctl_args[3] = {"systemd-hibernate", "systemd-suspend",
1557 "systemd-hybrid-sleep"};
1558 const char *cmd[4] = {"systemctl", "status", systemctl_args[mode], NULL};
1561 status = run_process_child(cmd, &local_err);
1564 * systemctl status uses LSB return codes so we can expect
1565 * status > 0 and be ok. To assert if the guest has support
1566 * for the selected suspend mode, status should be < 4. 4 is
1567 * the code for unknown service status, the return value when
1568 * the service does not exist. A common value is status = 3
1569 * (program is not running).
1571 if (status > 0 && status < 4) {
1575 error_propagate(errp, local_err);
1579 static void systemd_suspend(SuspendMode mode, Error **errp)
1581 Error *local_err = NULL;
1582 const char *systemctl_args[3] = {"hibernate", "suspend", "hybrid-sleep"};
1583 const char *cmd[3] = {"systemctl", systemctl_args[mode], NULL};
1586 status = run_process_child(cmd, &local_err);
1592 if ((status == -1) && !local_err) {
1593 error_setg(errp, "the helper program 'systemctl %s' was not found",
1594 systemctl_args[mode]);
1599 error_propagate(errp, local_err);
1601 error_setg(errp, "the helper program 'systemctl %s' returned an "
1602 "unexpected exit status code (%d)",
1603 systemctl_args[mode], status);
1607 static bool pmutils_supports_mode(SuspendMode mode, Error **errp)
1609 Error *local_err = NULL;
1610 const char *pmutils_args[3] = {"--hibernate", "--suspend",
1611 "--suspend-hybrid"};
1612 const char *cmd[3] = {"pm-is-supported", pmutils_args[mode], NULL};
1615 status = run_process_child(cmd, &local_err);
1617 if (status == SUSPEND_SUPPORTED) {
1621 if ((status == -1) && !local_err) {
1626 error_propagate(errp, local_err);
1629 "the helper program '%s' returned an unexpected exit"
1630 " status code (%d)", "pm-is-supported", status);
1636 static void pmutils_suspend(SuspendMode mode, Error **errp)
1638 Error *local_err = NULL;
1639 const char *pmutils_binaries[3] = {"pm-hibernate", "pm-suspend",
1640 "pm-suspend-hybrid"};
1641 const char *cmd[2] = {pmutils_binaries[mode], NULL};
1644 status = run_process_child(cmd, &local_err);
1650 if ((status == -1) && !local_err) {
1651 error_setg(errp, "the helper program '%s' was not found",
1652 pmutils_binaries[mode]);
1657 error_propagate(errp, local_err);
1660 "the helper program '%s' returned an unexpected exit"
1661 " status code (%d)", pmutils_binaries[mode], status);
1665 static bool linux_sys_state_supports_mode(SuspendMode mode, Error **errp)
1667 const char *sysfile_strs[3] = {"disk", "mem", NULL};
1668 const char *sysfile_str = sysfile_strs[mode];
1669 char buf[32]; /* hopefully big enough */
1674 error_setg(errp, "unknown guest suspend mode");
1678 fd = open(LINUX_SYS_STATE_FILE, O_RDONLY);
1683 ret = read(fd, buf, sizeof(buf) - 1);
1690 if (strstr(buf, sysfile_str)) {
1696 static void linux_sys_state_suspend(SuspendMode mode, Error **errp)
1698 Error *local_err = NULL;
1699 const char *sysfile_strs[3] = {"disk", "mem", NULL};
1700 const char *sysfile_str = sysfile_strs[mode];
1705 error_setg(errp, "unknown guest suspend mode");
1715 reopen_fd_to_null(0);
1716 reopen_fd_to_null(1);
1717 reopen_fd_to_null(2);
1719 fd = open(LINUX_SYS_STATE_FILE, O_WRONLY);
1721 _exit(EXIT_FAILURE);
1724 if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) {
1725 _exit(EXIT_FAILURE);
1728 _exit(EXIT_SUCCESS);
1729 } else if (pid < 0) {
1730 error_setg_errno(errp, errno, "failed to create child process");
1734 ga_wait_child(pid, &status, &local_err);
1736 error_propagate(errp, local_err);
1740 if (WEXITSTATUS(status)) {
1741 error_setg(errp, "child process has failed to suspend");
1746 static void guest_suspend(SuspendMode mode, Error **errp)
1748 Error *local_err = NULL;
1749 bool mode_supported = false;
1751 if (systemd_supports_mode(mode, &local_err)) {
1752 mode_supported = true;
1753 systemd_suspend(mode, &local_err);
1760 error_free(local_err);
1763 if (pmutils_supports_mode(mode, &local_err)) {
1764 mode_supported = true;
1765 pmutils_suspend(mode, &local_err);
1772 error_free(local_err);
1775 if (linux_sys_state_supports_mode(mode, &local_err)) {
1776 mode_supported = true;
1777 linux_sys_state_suspend(mode, &local_err);
1780 if (!mode_supported) {
1781 error_free(local_err);
1783 "the requested suspend mode is not supported by the guest");
1785 error_propagate(errp, local_err);
1789 void qmp_guest_suspend_disk(Error **errp)
1791 guest_suspend(SUSPEND_MODE_DISK, errp);
1794 void qmp_guest_suspend_ram(Error **errp)
1796 guest_suspend(SUSPEND_MODE_RAM, errp);
1799 void qmp_guest_suspend_hybrid(Error **errp)
1801 guest_suspend(SUSPEND_MODE_HYBRID, errp);
1804 static GuestNetworkInterfaceList *
1805 guest_find_interface(GuestNetworkInterfaceList *head,
1808 for (; head; head = head->next) {
1809 if (strcmp(head->value->name, name) == 0) {
1817 static int guest_get_network_stats(const char *name,
1818 GuestNetworkInterfaceStat *stats)
1821 char const *devinfo = "/proc/net/dev";
1823 char *line = NULL, *colon;
1825 fp = fopen(devinfo, "r");
1829 name_len = strlen(name);
1830 while (getline(&line, &n, fp) != -1) {
1833 long long rx_packets;
1835 long long rx_dropped;
1837 long long tx_packets;
1839 long long tx_dropped;
1841 trim_line = g_strchug(line);
1842 if (trim_line[0] == '\0') {
1845 colon = strchr(trim_line, ':');
1849 if (colon - name_len == trim_line &&
1850 strncmp(trim_line, name, name_len) == 0) {
1851 if (sscanf(colon + 1,
1852 "%lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld",
1853 &rx_bytes, &rx_packets, &rx_errs, &rx_dropped,
1854 &dummy, &dummy, &dummy, &dummy,
1855 &tx_bytes, &tx_packets, &tx_errs, &tx_dropped,
1856 &dummy, &dummy, &dummy, &dummy) != 16) {
1859 stats->rx_bytes = rx_bytes;
1860 stats->rx_packets = rx_packets;
1861 stats->rx_errs = rx_errs;
1862 stats->rx_dropped = rx_dropped;
1863 stats->tx_bytes = tx_bytes;
1864 stats->tx_packets = tx_packets;
1865 stats->tx_errs = tx_errs;
1866 stats->tx_dropped = tx_dropped;
1874 g_debug("/proc/net/dev: Interface '%s' not found", name);
1879 * Build information about guest interfaces
1881 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
1883 GuestNetworkInterfaceList *head = NULL, *cur_item = NULL;
1884 struct ifaddrs *ifap, *ifa;
1886 if (getifaddrs(&ifap) < 0) {
1887 error_setg_errno(errp, errno, "getifaddrs failed");
1891 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1892 GuestNetworkInterfaceList *info;
1893 GuestIpAddressList **address_list = NULL, *address_item = NULL;
1894 GuestNetworkInterfaceStat *interface_stat = NULL;
1895 char addr4[INET_ADDRSTRLEN];
1896 char addr6[INET6_ADDRSTRLEN];
1899 unsigned char *mac_addr;
1902 g_debug("Processing %s interface", ifa->ifa_name);
1904 info = guest_find_interface(head, ifa->ifa_name);
1907 info = g_malloc0(sizeof(*info));
1908 info->value = g_malloc0(sizeof(*info->value));
1909 info->value->name = g_strdup(ifa->ifa_name);
1912 head = cur_item = info;
1914 cur_item->next = info;
1919 if (!info->value->has_hardware_address &&
1920 ifa->ifa_flags & SIOCGIFHWADDR) {
1921 /* we haven't obtained HW address yet */
1922 sock = socket(PF_INET, SOCK_STREAM, 0);
1924 error_setg_errno(errp, errno, "failed to create socket");
1928 memset(&ifr, 0, sizeof(ifr));
1929 pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->value->name);
1930 if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) {
1931 error_setg_errno(errp, errno,
1932 "failed to get MAC address of %s",
1939 mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data;
1941 info->value->hardware_address =
1942 g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x",
1943 (int) mac_addr[0], (int) mac_addr[1],
1944 (int) mac_addr[2], (int) mac_addr[3],
1945 (int) mac_addr[4], (int) mac_addr[5]);
1947 info->value->has_hardware_address = true;
1950 if (ifa->ifa_addr &&
1951 ifa->ifa_addr->sa_family == AF_INET) {
1952 /* interface with IPv4 address */
1953 p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
1954 if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) {
1955 error_setg_errno(errp, errno, "inet_ntop failed");
1959 address_item = g_malloc0(sizeof(*address_item));
1960 address_item->value = g_malloc0(sizeof(*address_item->value));
1961 address_item->value->ip_address = g_strdup(addr4);
1962 address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4;
1964 if (ifa->ifa_netmask) {
1965 /* Count the number of set bits in netmask.
1966 * This is safe as '1' and '0' cannot be shuffled in netmask. */
1967 p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr;
1968 address_item->value->prefix = ctpop32(((uint32_t *) p)[0]);
1970 } else if (ifa->ifa_addr &&
1971 ifa->ifa_addr->sa_family == AF_INET6) {
1972 /* interface with IPv6 address */
1973 p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
1974 if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) {
1975 error_setg_errno(errp, errno, "inet_ntop failed");
1979 address_item = g_malloc0(sizeof(*address_item));
1980 address_item->value = g_malloc0(sizeof(*address_item->value));
1981 address_item->value->ip_address = g_strdup(addr6);
1982 address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6;
1984 if (ifa->ifa_netmask) {
1985 /* Count the number of set bits in netmask.
1986 * This is safe as '1' and '0' cannot be shuffled in netmask. */
1987 p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr;
1988 address_item->value->prefix =
1989 ctpop32(((uint32_t *) p)[0]) +
1990 ctpop32(((uint32_t *) p)[1]) +
1991 ctpop32(((uint32_t *) p)[2]) +
1992 ctpop32(((uint32_t *) p)[3]);
1996 if (!address_item) {
2000 address_list = &info->value->ip_addresses;
2002 while (*address_list && (*address_list)->next) {
2003 address_list = &(*address_list)->next;
2006 if (!*address_list) {
2007 *address_list = address_item;
2009 (*address_list)->next = address_item;
2012 info->value->has_ip_addresses = true;
2014 if (!info->value->has_statistics) {
2015 interface_stat = g_malloc0(sizeof(*interface_stat));
2016 if (guest_get_network_stats(info->value->name,
2017 interface_stat) == -1) {
2018 info->value->has_statistics = false;
2019 g_free(interface_stat);
2021 info->value->statistics = interface_stat;
2022 info->value->has_statistics = true;
2032 qapi_free_GuestNetworkInterfaceList(head);
2036 #define SYSCONF_EXACT(name, errp) sysconf_exact((name), #name, (errp))
2038 static long sysconf_exact(int name, const char *name_str, Error **errp)
2043 ret = sysconf(name);
2046 error_setg(errp, "sysconf(%s): value indefinite", name_str);
2048 error_setg_errno(errp, errno, "sysconf(%s)", name_str);
2054 /* Transfer online/offline status between @vcpu and the guest system.
2056 * On input either @errp or *@errp must be NULL.
2058 * In system-to-@vcpu direction, the following @vcpu fields are accessed:
2059 * - R: vcpu->logical_id
2061 * - W: vcpu->can_offline
2063 * In @vcpu-to-system direction, the following @vcpu fields are accessed:
2064 * - R: vcpu->logical_id
2067 * Written members remain unmodified on error.
2069 static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu,
2070 char *dirpath, Error **errp)
2075 static const char fn[] = "online";
2077 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2079 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2083 fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR);
2085 if (errno != ENOENT) {
2086 error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn);
2087 } else if (sys2vcpu) {
2088 vcpu->online = true;
2089 vcpu->can_offline = false;
2090 } else if (!vcpu->online) {
2091 error_setg(errp, "logical processor #%" PRId64 " can't be "
2092 "offlined", vcpu->logical_id);
2093 } /* otherwise pretend successful re-onlining */
2095 unsigned char status;
2097 res = pread(fd, &status, 1, 0);
2099 error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn);
2100 } else if (res == 0) {
2101 error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath,
2103 } else if (sys2vcpu) {
2104 vcpu->online = (status != '0');
2105 vcpu->can_offline = true;
2106 } else if (vcpu->online != (status != '0')) {
2107 status = '0' + vcpu->online;
2108 if (pwrite(fd, &status, 1, 0) == -1) {
2109 error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath,
2112 } /* otherwise pretend successful re-(on|off)-lining */
2122 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
2125 GuestLogicalProcessorList *head, **link;
2127 Error *local_err = NULL;
2132 sc_max = SYSCONF_EXACT(_SC_NPROCESSORS_CONF, &local_err);
2134 while (local_err == NULL && current < sc_max) {
2135 GuestLogicalProcessor *vcpu;
2136 GuestLogicalProcessorList *entry;
2137 int64_t id = current++;
2138 char *path = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/",
2141 if (g_file_test(path, G_FILE_TEST_EXISTS)) {
2142 vcpu = g_malloc0(sizeof *vcpu);
2143 vcpu->logical_id = id;
2144 vcpu->has_can_offline = true; /* lolspeak ftw */
2145 transfer_vcpu(vcpu, true, path, &local_err);
2146 entry = g_malloc0(sizeof *entry);
2147 entry->value = vcpu;
2149 link = &entry->next;
2154 if (local_err == NULL) {
2155 /* there's no guest with zero VCPUs */
2156 g_assert(head != NULL);
2160 qapi_free_GuestLogicalProcessorList(head);
2161 error_propagate(errp, local_err);
2165 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
2168 Error *local_err = NULL;
2171 while (vcpus != NULL) {
2172 char *path = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/",
2173 vcpus->value->logical_id);
2175 transfer_vcpu(vcpus->value, false, path, &local_err);
2177 if (local_err != NULL) {
2181 vcpus = vcpus->next;
2184 if (local_err != NULL) {
2185 if (processed == 0) {
2186 error_propagate(errp, local_err);
2188 error_free(local_err);
2195 void qmp_guest_set_user_password(const char *username,
2196 const char *password,
2200 Error *local_err = NULL;
2201 char *passwd_path = NULL;
2204 int datafd[2] = { -1, -1 };
2205 char *rawpasswddata = NULL;
2206 size_t rawpasswdlen;
2207 char *chpasswddata = NULL;
2210 rawpasswddata = (char *)qbase64_decode(password, -1, &rawpasswdlen, errp);
2211 if (!rawpasswddata) {
2214 rawpasswddata = g_renew(char, rawpasswddata, rawpasswdlen + 1);
2215 rawpasswddata[rawpasswdlen] = '\0';
2217 if (strchr(rawpasswddata, '\n')) {
2218 error_setg(errp, "forbidden characters in raw password");
2222 if (strchr(username, '\n') ||
2223 strchr(username, ':')) {
2224 error_setg(errp, "forbidden characters in username");
2228 chpasswddata = g_strdup_printf("%s:%s\n", username, rawpasswddata);
2229 chpasswdlen = strlen(chpasswddata);
2231 passwd_path = g_find_program_in_path("chpasswd");
2234 error_setg(errp, "cannot find 'passwd' program in PATH");
2238 if (pipe(datafd) < 0) {
2239 error_setg(errp, "cannot create pipe FDs");
2249 reopen_fd_to_null(1);
2250 reopen_fd_to_null(2);
2253 execle(passwd_path, "chpasswd", "-e", NULL, environ);
2255 execle(passwd_path, "chpasswd", NULL, environ);
2257 _exit(EXIT_FAILURE);
2258 } else if (pid < 0) {
2259 error_setg_errno(errp, errno, "failed to create child process");
2265 if (qemu_write_full(datafd[1], chpasswddata, chpasswdlen) != chpasswdlen) {
2266 error_setg_errno(errp, errno, "cannot write new account password");
2272 ga_wait_child(pid, &status, &local_err);
2274 error_propagate(errp, local_err);
2278 if (!WIFEXITED(status)) {
2279 error_setg(errp, "child process has terminated abnormally");
2283 if (WEXITSTATUS(status)) {
2284 error_setg(errp, "child process has failed to set user password");
2289 g_free(chpasswddata);
2290 g_free(rawpasswddata);
2291 g_free(passwd_path);
2292 if (datafd[0] != -1) {
2295 if (datafd[1] != -1) {
2300 static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf,
2301 int size, Error **errp)
2307 fd = openat(dirfd, pathname, O_RDONLY);
2309 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname);
2313 res = pread(fd, buf, size, 0);
2315 error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname);
2316 } else if (res == 0) {
2317 error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname);
2322 static void ga_write_sysfs_file(int dirfd, const char *pathname,
2323 const char *buf, int size, Error **errp)
2328 fd = openat(dirfd, pathname, O_WRONLY);
2330 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname);
2334 if (pwrite(fd, buf, size, 0) == -1) {
2335 error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname);
2341 /* Transfer online/offline status between @mem_blk and the guest system.
2343 * On input either @errp or *@errp must be NULL.
2345 * In system-to-@mem_blk direction, the following @mem_blk fields are accessed:
2346 * - R: mem_blk->phys_index
2347 * - W: mem_blk->online
2348 * - W: mem_blk->can_offline
2350 * In @mem_blk-to-system direction, the following @mem_blk fields are accessed:
2351 * - R: mem_blk->phys_index
2352 * - R: mem_blk->online
2353 *- R: mem_blk->can_offline
2354 * Written members remain unmodified on error.
2356 static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk,
2357 GuestMemoryBlockResponse *result,
2363 Error *local_err = NULL;
2369 error_setg(errp, "Internal error, 'result' should not be NULL");
2373 dp = opendir("/sys/devices/system/memory/");
2374 /* if there is no 'memory' directory in sysfs,
2375 * we think this VM does not support online/offline memory block,
2376 * any other solution?
2379 if (errno == ENOENT) {
2381 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED;
2388 dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/",
2389 mem_blk->phys_index);
2390 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2393 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2395 if (errno == ENOENT) {
2396 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND;
2399 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2407 status = g_malloc0(10);
2408 ga_read_sysfs_file(dirfd, "state", status, 10, &local_err);
2410 /* treat with sysfs file that not exist in old kernel */
2411 if (errno == ENOENT) {
2412 error_free(local_err);
2414 mem_blk->online = true;
2415 mem_blk->can_offline = false;
2416 } else if (!mem_blk->online) {
2418 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED;
2422 error_propagate(errp, local_err);
2424 error_free(local_err);
2426 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2433 char removable = '0';
2435 mem_blk->online = (strncmp(status, "online", 6) == 0);
2437 ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err);
2439 /* if no 'removable' file, it doesn't support offline mem blk */
2440 if (errno == ENOENT) {
2441 error_free(local_err);
2442 mem_blk->can_offline = false;
2444 error_propagate(errp, local_err);
2447 mem_blk->can_offline = (removable != '0');
2450 if (mem_blk->online != (strncmp(status, "online", 6) == 0)) {
2451 const char *new_state = mem_blk->online ? "online" : "offline";
2453 ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state),
2456 error_free(local_err);
2458 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2462 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS;
2463 result->has_error_code = false;
2464 } /* otherwise pretend successful re-(on|off)-lining */
2475 result->has_error_code = true;
2476 result->error_code = errno;
2480 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp)
2482 GuestMemoryBlockList *head, **link;
2483 Error *local_err = NULL;
2490 dp = opendir("/sys/devices/system/memory/");
2492 /* it's ok if this happens to be a system that doesn't expose
2493 * memory blocks via sysfs, but otherwise we should report
2496 if (errno != ENOENT) {
2497 error_setg_errno(errp, errno, "Can't open directory"
2498 "\"/sys/devices/system/memory/\"");
2503 /* Note: the phys_index of memory block may be discontinuous,
2504 * this is because a memblk is the unit of the Sparse Memory design, which
2505 * allows discontinuous memory ranges (ex. NUMA), so here we should
2506 * traverse the memory block directory.
2508 while ((de = readdir(dp)) != NULL) {
2509 GuestMemoryBlock *mem_blk;
2510 GuestMemoryBlockList *entry;
2512 if ((strncmp(de->d_name, "memory", 6) != 0) ||
2513 !(de->d_type & DT_DIR)) {
2517 mem_blk = g_malloc0(sizeof *mem_blk);
2518 /* The d_name is "memoryXXX", phys_index is block id, same as XXX */
2519 mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10);
2520 mem_blk->has_can_offline = true; /* lolspeak ftw */
2521 transfer_memory_block(mem_blk, true, NULL, &local_err);
2526 entry = g_malloc0(sizeof *entry);
2527 entry->value = mem_blk;
2530 link = &entry->next;
2534 if (local_err == NULL) {
2535 /* there's no guest with zero memory blocks */
2537 error_setg(errp, "guest reported zero memory blocks!");
2542 qapi_free_GuestMemoryBlockList(head);
2543 error_propagate(errp, local_err);
2547 GuestMemoryBlockResponseList *
2548 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp)
2550 GuestMemoryBlockResponseList *head, **link;
2551 Error *local_err = NULL;
2556 while (mem_blks != NULL) {
2557 GuestMemoryBlockResponse *result;
2558 GuestMemoryBlockResponseList *entry;
2559 GuestMemoryBlock *current_mem_blk = mem_blks->value;
2561 result = g_malloc0(sizeof(*result));
2562 result->phys_index = current_mem_blk->phys_index;
2563 transfer_memory_block(current_mem_blk, false, result, &local_err);
2564 if (local_err) { /* should never happen */
2567 entry = g_malloc0(sizeof *entry);
2568 entry->value = result;
2571 link = &entry->next;
2572 mem_blks = mem_blks->next;
2577 qapi_free_GuestMemoryBlockResponseList(head);
2578 error_propagate(errp, local_err);
2582 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp)
2584 Error *local_err = NULL;
2588 GuestMemoryBlockInfo *info;
2590 dirpath = g_strdup_printf("/sys/devices/system/memory/");
2591 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2593 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2599 buf = g_malloc0(20);
2600 ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err);
2604 error_propagate(errp, local_err);
2608 info = g_new0(GuestMemoryBlockInfo, 1);
2609 info->size = strtol(buf, NULL, 16); /* the unit is bytes */
2616 #else /* defined(__linux__) */
2618 void qmp_guest_suspend_disk(Error **errp)
2620 error_setg(errp, QERR_UNSUPPORTED);
2623 void qmp_guest_suspend_ram(Error **errp)
2625 error_setg(errp, QERR_UNSUPPORTED);
2628 void qmp_guest_suspend_hybrid(Error **errp)
2630 error_setg(errp, QERR_UNSUPPORTED);
2633 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
2635 error_setg(errp, QERR_UNSUPPORTED);
2639 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
2641 error_setg(errp, QERR_UNSUPPORTED);
2645 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
2647 error_setg(errp, QERR_UNSUPPORTED);
2651 void qmp_guest_set_user_password(const char *username,
2652 const char *password,
2656 error_setg(errp, QERR_UNSUPPORTED);
2659 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp)
2661 error_setg(errp, QERR_UNSUPPORTED);
2665 GuestMemoryBlockResponseList *
2666 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp)
2668 error_setg(errp, QERR_UNSUPPORTED);
2672 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp)
2674 error_setg(errp, QERR_UNSUPPORTED);
2680 #if !defined(CONFIG_FSFREEZE)
2682 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
2684 error_setg(errp, QERR_UNSUPPORTED);
2688 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
2690 error_setg(errp, QERR_UNSUPPORTED);
2695 int64_t qmp_guest_fsfreeze_freeze(Error **errp)
2697 error_setg(errp, QERR_UNSUPPORTED);
2702 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
2703 strList *mountpoints,
2706 error_setg(errp, QERR_UNSUPPORTED);
2711 int64_t qmp_guest_fsfreeze_thaw(Error **errp)
2713 error_setg(errp, QERR_UNSUPPORTED);
2717 #endif /* CONFIG_FSFREEZE */
2719 #if !defined(CONFIG_FSTRIM)
2720 GuestFilesystemTrimResponse *
2721 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
2723 error_setg(errp, QERR_UNSUPPORTED);
2728 /* add unsupported commands to the blacklist */
2729 GList *ga_command_blacklist_init(GList *blacklist)
2731 #if !defined(__linux__)
2733 const char *list[] = {
2734 "guest-suspend-disk", "guest-suspend-ram",
2735 "guest-suspend-hybrid", "guest-network-get-interfaces",
2736 "guest-get-vcpus", "guest-set-vcpus",
2737 "guest-get-memory-blocks", "guest-set-memory-blocks",
2738 "guest-get-memory-block-size", "guest-get-memory-block-info",
2740 char **p = (char **)list;
2743 blacklist = g_list_append(blacklist, g_strdup(*p++));
2748 #if !defined(CONFIG_FSFREEZE)
2750 const char *list[] = {
2751 "guest-get-fsinfo", "guest-fsfreeze-status",
2752 "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list",
2753 "guest-fsfreeze-thaw", "guest-get-fsinfo", NULL};
2754 char **p = (char **)list;
2757 blacklist = g_list_append(blacklist, g_strdup(*p++));
2762 #if !defined(CONFIG_FSTRIM)
2763 blacklist = g_list_append(blacklist, g_strdup("guest-fstrim"));
2769 /* register init/cleanup routines for stateful command groups */
2770 void ga_command_state_init(GAState *s, GACommandState *cs)
2772 #if defined(CONFIG_FSFREEZE)
2773 ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup);
2779 #define QGA_MICRO_SECOND_TO_SECOND 1000000
2781 static double ga_get_login_time(struct utmpx *user_info)
2783 double seconds = (double)user_info->ut_tv.tv_sec;
2784 double useconds = (double)user_info->ut_tv.tv_usec;
2785 useconds /= QGA_MICRO_SECOND_TO_SECOND;
2786 return seconds + useconds;
2789 GuestUserList *qmp_guest_get_users(Error **errp)
2791 GHashTable *cache = NULL;
2792 GuestUserList *head = NULL, *cur_item = NULL;
2793 struct utmpx *user_info = NULL;
2794 gpointer value = NULL;
2795 GuestUser *user = NULL;
2796 GuestUserList *item = NULL;
2797 double login_time = 0;
2799 cache = g_hash_table_new(g_str_hash, g_str_equal);
2803 user_info = getutxent();
2804 if (user_info == NULL) {
2806 } else if (user_info->ut_type != USER_PROCESS) {
2808 } else if (g_hash_table_contains(cache, user_info->ut_user)) {
2809 value = g_hash_table_lookup(cache, user_info->ut_user);
2810 user = (GuestUser *)value;
2811 login_time = ga_get_login_time(user_info);
2812 /* We're ensuring the earliest login time to be sent */
2813 if (login_time < user->login_time) {
2814 user->login_time = login_time;
2819 item = g_new0(GuestUserList, 1);
2820 item->value = g_new0(GuestUser, 1);
2821 item->value->user = g_strdup(user_info->ut_user);
2822 item->value->login_time = ga_get_login_time(user_info);
2824 g_hash_table_insert(cache, item->value->user, item->value);
2827 head = cur_item = item;
2829 cur_item->next = item;
2834 g_hash_table_destroy(cache);
2840 GuestUserList *qmp_guest_get_users(Error **errp)
2842 error_setg(errp, QERR_UNSUPPORTED);
2848 /* Replace escaped special characters with theire real values. The replacement
2849 * is done in place -- returned value is in the original string.
2851 static void ga_osrelease_replace_special(gchar *value)
2853 gchar *p, *p2, quote;
2855 /* Trim the string at first space or semicolon if it is not enclosed in
2856 * single or double quotes. */
2857 if ((value[0] != '"') || (value[0] == '\'')) {
2858 p = strchr(value, ' ');
2862 p = strchr(value, ';');
2883 /* Keep literal backslash followed by whatever is there */
2887 } else if (*p == quote) {
2895 static GKeyFile *ga_parse_osrelease(const char *fname)
2897 gchar *content = NULL;
2898 gchar *content2 = NULL;
2900 GKeyFile *keys = g_key_file_new();
2901 const char *group = "[os-release]\n";
2903 if (!g_file_get_contents(fname, &content, NULL, &err)) {
2904 slog("failed to read '%s', error: %s", fname, err->message);
2908 if (!g_utf8_validate(content, -1, NULL)) {
2909 slog("file is not utf-8 encoded: %s", fname);
2912 content2 = g_strdup_printf("%s%s", group, content);
2914 if (!g_key_file_load_from_data(keys, content2, -1, G_KEY_FILE_NONE,
2916 slog("failed to parse file '%s', error: %s", fname, err->message);
2928 g_key_file_free(keys);
2932 GuestOSInfo *qmp_guest_get_osinfo(Error **errp)
2934 GuestOSInfo *info = NULL;
2935 struct utsname kinfo;
2936 GKeyFile *osrelease = NULL;
2937 const char *qga_os_release = g_getenv("QGA_OS_RELEASE");
2939 info = g_new0(GuestOSInfo, 1);
2941 if (uname(&kinfo) != 0) {
2942 error_setg_errno(errp, errno, "uname failed");
2944 info->has_kernel_version = true;
2945 info->kernel_version = g_strdup(kinfo.version);
2946 info->has_kernel_release = true;
2947 info->kernel_release = g_strdup(kinfo.release);
2948 info->has_machine = true;
2949 info->machine = g_strdup(kinfo.machine);
2952 if (qga_os_release != NULL) {
2953 osrelease = ga_parse_osrelease(qga_os_release);
2955 osrelease = ga_parse_osrelease("/etc/os-release");
2956 if (osrelease == NULL) {
2957 osrelease = ga_parse_osrelease("/usr/lib/os-release");
2961 if (osrelease != NULL) {
2964 #define GET_FIELD(field, osfield) do { \
2965 value = g_key_file_get_value(osrelease, "os-release", osfield, NULL); \
2966 if (value != NULL) { \
2967 ga_osrelease_replace_special(value); \
2968 info->has_ ## field = true; \
2969 info->field = value; \
2972 GET_FIELD(id, "ID");
2973 GET_FIELD(name, "NAME");
2974 GET_FIELD(pretty_name, "PRETTY_NAME");
2975 GET_FIELD(version, "VERSION");
2976 GET_FIELD(version_id, "VERSION_ID");
2977 GET_FIELD(variant, "VARIANT");
2978 GET_FIELD(variant_id, "VARIANT_ID");
2981 g_key_file_free(osrelease);