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>
18 #include "qga/guest-agent-core.h"
19 #include "qga-qmp-commands.h"
20 #include "qapi/qmp/qerror.h"
21 #include "qemu/queue.h"
22 #include "qemu/host-utils.h"
23 #include "qemu/sockets.h"
24 #include "qemu/base64.h"
25 #include "qemu/cutils.h"
27 #ifndef CONFIG_HAS_ENVIRON
29 #include <crt_externs.h>
30 #define environ (*_NSGetEnviron())
32 extern char **environ;
36 #if defined(__linux__)
40 #include <arpa/inet.h>
41 #include <sys/socket.h>
45 #define CONFIG_FSFREEZE
52 static void ga_wait_child(pid_t pid, int *status, Error **errp)
59 rpid = waitpid(pid, status, 0);
60 } while (rpid == -1 && errno == EINTR);
63 error_setg_errno(errp, errno, "failed to wait for child (pid: %d)",
68 g_assert(rpid == pid);
71 void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp)
73 const char *shutdown_flag;
74 Error *local_err = NULL;
78 slog("guest-shutdown called, mode: %s", mode);
79 if (!has_mode || strcmp(mode, "powerdown") == 0) {
81 } else if (strcmp(mode, "halt") == 0) {
83 } else if (strcmp(mode, "reboot") == 0) {
87 "mode is invalid (valid values are: halt|powerdown|reboot");
93 /* child, start the shutdown */
99 execle("/sbin/shutdown", "shutdown", "-h", shutdown_flag, "+0",
100 "hypervisor initiated shutdown", (char*)NULL, environ);
102 } else if (pid < 0) {
103 error_setg_errno(errp, errno, "failed to create child process");
107 ga_wait_child(pid, &status, &local_err);
109 error_propagate(errp, local_err);
113 if (!WIFEXITED(status)) {
114 error_setg(errp, "child process has terminated abnormally");
118 if (WEXITSTATUS(status)) {
119 error_setg(errp, "child process has failed to shutdown");
126 int64_t qmp_guest_get_time(Error **errp)
131 ret = qemu_gettimeofday(&tq);
133 error_setg_errno(errp, errno, "Failed to get time");
137 return tq.tv_sec * 1000000000LL + tq.tv_usec * 1000;
140 void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp)
145 Error *local_err = NULL;
148 /* If user has passed a time, validate and set it. */
152 /* year-2038 will overflow in case time_t is 32bit */
153 if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) {
154 error_setg(errp, "Time %" PRId64 " is too large", time_ns);
158 tv.tv_sec = time_ns / 1000000000;
159 tv.tv_usec = (time_ns % 1000000000) / 1000;
160 g_date_set_time_t(&date, tv.tv_sec);
161 if (date.year < 1970 || date.year >= 2070) {
162 error_setg_errno(errp, errno, "Invalid time");
166 ret = settimeofday(&tv, NULL);
168 error_setg_errno(errp, errno, "Failed to set time to guest");
173 /* Now, if user has passed a time to set and the system time is set, we
174 * just need to synchronize the hardware clock. However, if no time was
175 * passed, user is requesting the opposite: set the system time from the
176 * hardware clock (RTC). */
180 reopen_fd_to_null(0);
181 reopen_fd_to_null(1);
182 reopen_fd_to_null(2);
184 /* Use '/sbin/hwclock -w' to set RTC from the system time,
185 * or '/sbin/hwclock -s' to set the system time from RTC. */
186 execle("/sbin/hwclock", "hwclock", has_time ? "-w" : "-s",
189 } else if (pid < 0) {
190 error_setg_errno(errp, errno, "failed to create child process");
194 ga_wait_child(pid, &status, &local_err);
196 error_propagate(errp, local_err);
200 if (!WIFEXITED(status)) {
201 error_setg(errp, "child process has terminated abnormally");
205 if (WEXITSTATUS(status)) {
206 error_setg(errp, "hwclock failed to set hardware clock to system time");
217 typedef struct GuestFileHandle {
221 QTAILQ_ENTRY(GuestFileHandle) next;
225 QTAILQ_HEAD(, GuestFileHandle) filehandles;
226 } guest_file_state = {
227 .filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles),
230 static int64_t guest_file_handle_add(FILE *fh, Error **errp)
232 GuestFileHandle *gfh;
235 handle = ga_get_fd_handle(ga_state, errp);
240 gfh = g_new0(GuestFileHandle, 1);
243 QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next);
248 static GuestFileHandle *guest_file_handle_find(int64_t id, Error **errp)
250 GuestFileHandle *gfh;
252 QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next)
259 error_setg(errp, "handle '%" PRId64 "' has not been found", id);
263 typedef const char * const ccpc;
269 /* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */
270 static const struct {
273 } guest_file_open_modes[] = {
274 { (ccpc[]){ "r", NULL }, O_RDONLY },
275 { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY },
276 { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC },
277 { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY },
278 { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND },
279 { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY },
280 { (ccpc[]){ "r+", NULL }, O_RDWR },
281 { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY },
282 { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC },
283 { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY },
284 { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND },
285 { (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY }
289 find_open_flag(const char *mode_str, Error **errp)
293 for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) {
296 form = guest_file_open_modes[mode].forms;
297 while (*form != NULL && strcmp(*form, mode_str) != 0) {
305 if (mode == ARRAY_SIZE(guest_file_open_modes)) {
306 error_setg(errp, "invalid file open mode '%s'", mode_str);
309 return guest_file_open_modes[mode].oflag_base | O_NOCTTY | O_NONBLOCK;
312 #define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \
313 S_IRGRP | S_IWGRP | \
317 safe_open_or_create(const char *path, const char *mode, Error **errp)
319 Error *local_err = NULL;
322 oflag = find_open_flag(mode, &local_err);
323 if (local_err == NULL) {
326 /* If the caller wants / allows creation of a new file, we implement it
327 * with a two step process: open() + (open() / fchmod()).
329 * First we insist on creating the file exclusively as a new file. If
330 * that succeeds, we're free to set any file-mode bits on it. (The
331 * motivation is that we want to set those file-mode bits independently
332 * of the current umask.)
334 * If the exclusive creation fails because the file already exists
335 * (EEXIST is not possible for any other reason), we just attempt to
336 * open the file, but in this case we won't be allowed to change the
337 * file-mode bits on the preexistent file.
339 * The pathname should never disappear between the two open()s in
340 * practice. If it happens, then someone very likely tried to race us.
341 * In this case just go ahead and report the ENOENT from the second
342 * open() to the caller.
344 * If the caller wants to open a preexistent file, then the first
345 * open() is decisive and its third argument is ignored, and the second
346 * open() and the fchmod() are never called.
348 fd = open(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0);
349 if (fd == -1 && errno == EEXIST) {
350 oflag &= ~(unsigned)O_CREAT;
351 fd = open(path, oflag);
355 error_setg_errno(&local_err, errno, "failed to open file '%s' "
356 "(mode: '%s')", path, mode);
358 qemu_set_cloexec(fd);
360 if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) {
361 error_setg_errno(&local_err, errno, "failed to set permission "
362 "0%03o on new file '%s' (mode: '%s')",
363 (unsigned)DEFAULT_NEW_FILE_MODE, path, mode);
367 f = fdopen(fd, mode);
369 error_setg_errno(&local_err, errno, "failed to associate "
370 "stdio stream with file descriptor %d, "
371 "file '%s' (mode: '%s')", fd, path, mode);
378 if (oflag & O_CREAT) {
384 error_propagate(errp, local_err);
388 int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode,
392 Error *local_err = NULL;
398 slog("guest-file-open called, filepath: %s, mode: %s", path, mode);
399 fh = safe_open_or_create(path, mode, &local_err);
400 if (local_err != NULL) {
401 error_propagate(errp, local_err);
405 /* set fd non-blocking to avoid common use cases (like reading from a
406 * named pipe) from hanging the agent
408 qemu_set_nonblock(fileno(fh));
410 handle = guest_file_handle_add(fh, errp);
416 slog("guest-file-open, handle: %" PRId64, handle);
420 void qmp_guest_file_close(int64_t handle, Error **errp)
422 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
425 slog("guest-file-close called, handle: %" PRId64, handle);
430 ret = fclose(gfh->fh);
432 error_setg_errno(errp, errno, "failed to close handle");
436 QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next);
440 struct GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count,
441 int64_t count, Error **errp)
443 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
444 GuestFileRead *read_data = NULL;
454 count = QGA_READ_COUNT_DEFAULT;
455 } else if (count < 0) {
456 error_setg(errp, "value '%" PRId64 "' is invalid for argument count",
463 /* explicitly flush when switching from writing to reading */
464 if (gfh->state == RW_STATE_WRITING) {
465 int ret = fflush(fh);
467 error_setg_errno(errp, errno, "failed to flush file");
470 gfh->state = RW_STATE_NEW;
473 buf = g_malloc0(count+1);
474 read_count = fread(buf, 1, count, fh);
476 error_setg_errno(errp, errno, "failed to read file");
477 slog("guest-file-read failed, handle: %" PRId64, handle);
480 read_data = g_new0(GuestFileRead, 1);
481 read_data->count = read_count;
482 read_data->eof = feof(fh);
484 read_data->buf_b64 = g_base64_encode(buf, read_count);
486 gfh->state = RW_STATE_READING;
494 GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64,
495 bool has_count, int64_t count,
498 GuestFileWrite *write_data = NULL;
502 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
511 if (gfh->state == RW_STATE_READING) {
512 int ret = fseek(fh, 0, SEEK_CUR);
514 error_setg_errno(errp, errno, "failed to seek file");
517 gfh->state = RW_STATE_NEW;
520 buf = qbase64_decode(buf_b64, -1, &buf_len, errp);
527 } else if (count < 0 || count > buf_len) {
528 error_setg(errp, "value '%" PRId64 "' is invalid for argument count",
534 write_count = fwrite(buf, 1, count, fh);
536 error_setg_errno(errp, errno, "failed to write to file");
537 slog("guest-file-write failed, handle: %" PRId64, handle);
539 write_data = g_new0(GuestFileWrite, 1);
540 write_data->count = write_count;
541 write_data->eof = feof(fh);
542 gfh->state = RW_STATE_WRITING;
550 struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset,
551 GuestFileWhence *whence_code,
554 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
555 GuestFileSeek *seek_data = NULL;
565 /* We stupidly exposed 'whence':'int' in our qapi */
566 whence = ga_parse_whence(whence_code, &err);
568 error_propagate(errp, err);
573 ret = fseek(fh, offset, whence);
575 error_setg_errno(errp, errno, "failed to seek file");
576 if (errno == ESPIPE) {
577 /* file is non-seekable, stdio shouldn't be buffering anyways */
578 gfh->state = RW_STATE_NEW;
581 seek_data = g_new0(GuestFileSeek, 1);
582 seek_data->position = ftell(fh);
583 seek_data->eof = feof(fh);
584 gfh->state = RW_STATE_NEW;
591 void qmp_guest_file_flush(int64_t handle, Error **errp)
593 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
604 error_setg_errno(errp, errno, "failed to flush file");
606 gfh->state = RW_STATE_NEW;
610 /* linux-specific implementations. avoid this if at all possible. */
611 #if defined(__linux__)
613 #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM)
614 typedef struct FsMount {
617 unsigned int devmajor, devminor;
618 QTAILQ_ENTRY(FsMount) next;
621 typedef QTAILQ_HEAD(FsMountList, FsMount) FsMountList;
623 static void free_fs_mount_list(FsMountList *mounts)
625 FsMount *mount, *temp;
631 QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) {
632 QTAILQ_REMOVE(mounts, mount, next);
633 g_free(mount->dirname);
634 g_free(mount->devtype);
639 static int dev_major_minor(const char *devpath,
640 unsigned int *devmajor, unsigned int *devminor)
647 if (stat(devpath, &st) < 0) {
648 slog("failed to stat device file '%s': %s", devpath, strerror(errno));
651 if (S_ISDIR(st.st_mode)) {
652 /* It is bind mount */
655 if (S_ISBLK(st.st_mode)) {
656 *devmajor = major(st.st_rdev);
657 *devminor = minor(st.st_rdev);
664 * Walk the mount table and build a list of local file systems
666 static void build_fs_mount_list_from_mtab(FsMountList *mounts, Error **errp)
670 char const *mtab = "/proc/self/mounts";
672 unsigned int devmajor, devminor;
674 fp = setmntent(mtab, "r");
676 error_setg(errp, "failed to open mtab file: '%s'", mtab);
680 while ((ment = getmntent(fp))) {
682 * An entry which device name doesn't start with a '/' is
683 * either a dummy file system or a network file system.
684 * Add special handling for smbfs and cifs as is done by
687 if ((ment->mnt_fsname[0] != '/') ||
688 (strcmp(ment->mnt_type, "smbfs") == 0) ||
689 (strcmp(ment->mnt_type, "cifs") == 0)) {
692 if (dev_major_minor(ment->mnt_fsname, &devmajor, &devminor) == -2) {
693 /* Skip bind mounts */
697 mount = g_new0(FsMount, 1);
698 mount->dirname = g_strdup(ment->mnt_dir);
699 mount->devtype = g_strdup(ment->mnt_type);
700 mount->devmajor = devmajor;
701 mount->devminor = devminor;
703 QTAILQ_INSERT_TAIL(mounts, mount, next);
709 static void decode_mntname(char *name, int len)
712 for (i = 0; i <= len; i++) {
713 if (name[i] != '\\') {
715 } else if (name[i + 1] == '\\') {
718 } else if (name[i + 1] >= '0' && name[i + 1] <= '3' &&
719 name[i + 2] >= '0' && name[i + 2] <= '7' &&
720 name[i + 3] >= '0' && name[i + 3] <= '7') {
721 name[j++] = (name[i + 1] - '0') * 64 +
722 (name[i + 2] - '0') * 8 +
731 static void build_fs_mount_list(FsMountList *mounts, Error **errp)
734 char const *mountinfo = "/proc/self/mountinfo";
736 char *line = NULL, *dash;
739 unsigned int devmajor, devminor;
740 int ret, dir_s, dir_e, type_s, type_e, dev_s, dev_e;
742 fp = fopen(mountinfo, "r");
744 build_fs_mount_list_from_mtab(mounts, errp);
748 while (getline(&line, &n, fp) != -1) {
749 ret = sscanf(line, "%*u %*u %u:%u %*s %n%*s%n%c",
750 &devmajor, &devminor, &dir_s, &dir_e, &check);
754 dash = strstr(line + dir_e, " - ");
758 ret = sscanf(dash, " - %n%*s%n %n%*s%n%c",
759 &type_s, &type_e, &dev_s, &dev_e, &check);
766 decode_mntname(line + dir_s, dir_e - dir_s);
767 decode_mntname(dash + dev_s, dev_e - dev_s);
769 /* btrfs reports major number = 0 */
770 if (strcmp("btrfs", dash + type_s) != 0 ||
771 dev_major_minor(dash + dev_s, &devmajor, &devminor) < 0) {
776 mount = g_new0(FsMount, 1);
777 mount->dirname = g_strdup(line + dir_s);
778 mount->devtype = g_strdup(dash + type_s);
779 mount->devmajor = devmajor;
780 mount->devminor = devminor;
782 QTAILQ_INSERT_TAIL(mounts, mount, next);
790 #if defined(CONFIG_FSFREEZE)
792 static char *get_pci_driver(char const *syspath, int pathlen, Error **errp)
800 path = g_strndup(syspath, pathlen);
801 dpath = g_strdup_printf("%s/driver", path);
802 len = readlink(dpath, buf, sizeof(buf) - 1);
805 driver = g_strdup(basename(buf));
812 static int compare_uint(const void *_a, const void *_b)
814 unsigned int a = *(unsigned int *)_a;
815 unsigned int b = *(unsigned int *)_b;
817 return a < b ? -1 : a > b ? 1 : 0;
820 /* Walk the specified sysfs and build a sorted list of host or ata numbers */
821 static int build_hosts(char const *syspath, char const *host, bool ata,
822 unsigned int *hosts, int hosts_max, Error **errp)
826 struct dirent *entry;
829 path = g_strndup(syspath, host - syspath);
832 error_setg_errno(errp, errno, "opendir(\"%s\")", path);
837 while (i < hosts_max) {
838 entry = readdir(dir);
842 if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) {
844 } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) {
849 qsort(hosts, i, sizeof(hosts[0]), compare_uint);
856 /* Store disk device info specified by @sysfs into @fs */
857 static void build_guest_fsinfo_for_real_device(char const *syspath,
858 GuestFilesystemInfo *fs,
861 unsigned int pci[4], host, hosts[8], tgt[3];
862 int i, nhosts = 0, pcilen;
863 GuestDiskAddress *disk;
864 GuestPCIAddress *pciaddr;
865 GuestDiskAddressList *list = NULL;
866 bool has_ata = false, has_host = false, has_tgt = false;
867 char *p, *q, *driver = NULL;
869 p = strstr(syspath, "/devices/pci");
870 if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n",
871 pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) {
872 g_debug("only pci device is supported: sysfs path \"%s\"", syspath);
876 driver = get_pci_driver(syspath, (p + 12 + pcilen) - syspath, errp);
881 p = strstr(syspath, "/target");
882 if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u",
883 tgt, tgt + 1, tgt + 2) == 3) {
887 p = strstr(syspath, "/ata");
892 p = strstr(syspath, "/host");
895 if (p && sscanf(q, "%u", &host) == 1) {
897 nhosts = build_hosts(syspath, p, has_ata, hosts,
898 sizeof(hosts) / sizeof(hosts[0]), errp);
904 pciaddr = g_malloc0(sizeof(*pciaddr));
905 pciaddr->domain = pci[0];
906 pciaddr->bus = pci[1];
907 pciaddr->slot = pci[2];
908 pciaddr->function = pci[3];
910 disk = g_malloc0(sizeof(*disk));
911 disk->pci_controller = pciaddr;
913 list = g_malloc0(sizeof(*list));
916 if (strcmp(driver, "ata_piix") == 0) {
917 /* a host per ide bus, target*:0:<unit>:0 */
918 if (!has_host || !has_tgt) {
919 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
922 for (i = 0; i < nhosts; i++) {
923 if (host == hosts[i]) {
924 disk->bus_type = GUEST_DISK_BUS_TYPE_IDE;
931 g_debug("no host for '%s' (driver '%s')", syspath, driver);
934 } else if (strcmp(driver, "sym53c8xx") == 0) {
935 /* scsi(LSI Logic): target*:0:<unit>:0 */
937 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
940 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
942 } else if (strcmp(driver, "virtio-pci") == 0) {
944 /* virtio-scsi: target*:0:0:<unit> */
945 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
948 /* virtio-blk: 1 disk per 1 device */
949 disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO;
951 } else if (strcmp(driver, "ahci") == 0) {
952 /* ahci: 1 host per 1 unit */
953 if (!has_host || !has_tgt) {
954 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
957 for (i = 0; i < nhosts; i++) {
958 if (host == hosts[i]) {
960 disk->bus_type = GUEST_DISK_BUS_TYPE_SATA;
965 g_debug("no host for '%s' (driver '%s')", syspath, driver);
969 g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath);
973 list->next = fs->disk;
980 qapi_free_GuestDiskAddressList(list);
985 static void build_guest_fsinfo_for_device(char const *devpath,
986 GuestFilesystemInfo *fs,
989 /* Store a list of slave devices of virtual volume specified by @syspath into
991 static void build_guest_fsinfo_for_virtual_device(char const *syspath,
992 GuestFilesystemInfo *fs,
997 struct dirent *entry;
999 dirpath = g_strdup_printf("%s/slaves", syspath);
1000 dir = opendir(dirpath);
1002 error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath);
1009 entry = readdir(dir);
1010 if (entry == NULL) {
1012 error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath);
1017 if (entry->d_type == DT_LNK) {
1020 g_debug(" slave device '%s'", entry->d_name);
1021 path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name);
1022 build_guest_fsinfo_for_device(path, fs, errp);
1035 /* Dispatch to functions for virtual/real device */
1036 static void build_guest_fsinfo_for_device(char const *devpath,
1037 GuestFilesystemInfo *fs,
1040 char *syspath = realpath(devpath, NULL);
1043 error_setg_errno(errp, errno, "realpath(\"%s\")", devpath);
1048 fs->name = g_strdup(basename(syspath));
1051 g_debug(" parse sysfs path '%s'", syspath);
1053 if (strstr(syspath, "/devices/virtual/block/")) {
1054 build_guest_fsinfo_for_virtual_device(syspath, fs, errp);
1056 build_guest_fsinfo_for_real_device(syspath, fs, errp);
1062 /* Return a list of the disk device(s)' info which @mount lies on */
1063 static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount,
1066 GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs));
1067 char *devpath = g_strdup_printf("/sys/dev/block/%u:%u",
1068 mount->devmajor, mount->devminor);
1070 fs->mountpoint = g_strdup(mount->dirname);
1071 fs->type = g_strdup(mount->devtype);
1072 build_guest_fsinfo_for_device(devpath, fs, errp);
1078 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
1081 struct FsMount *mount;
1082 GuestFilesystemInfoList *new, *ret = NULL;
1083 Error *local_err = NULL;
1085 QTAILQ_INIT(&mounts);
1086 build_fs_mount_list(&mounts, &local_err);
1088 error_propagate(errp, local_err);
1092 QTAILQ_FOREACH(mount, &mounts, next) {
1093 g_debug("Building guest fsinfo for '%s'", mount->dirname);
1095 new = g_malloc0(sizeof(*ret));
1096 new->value = build_guest_fsinfo(mount, &local_err);
1100 error_propagate(errp, local_err);
1101 qapi_free_GuestFilesystemInfoList(ret);
1107 free_fs_mount_list(&mounts);
1113 FSFREEZE_HOOK_THAW = 0,
1114 FSFREEZE_HOOK_FREEZE,
1117 static const char *fsfreeze_hook_arg_string[] = {
1122 static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **errp)
1127 const char *arg_str = fsfreeze_hook_arg_string[arg];
1128 Error *local_err = NULL;
1130 hook = ga_fsfreeze_hook(ga_state);
1134 if (access(hook, X_OK) != 0) {
1135 error_setg_errno(errp, errno, "can't access fsfreeze hook '%s'", hook);
1139 slog("executing fsfreeze hook with arg '%s'", arg_str);
1143 reopen_fd_to_null(0);
1144 reopen_fd_to_null(1);
1145 reopen_fd_to_null(2);
1147 execle(hook, hook, arg_str, NULL, environ);
1148 _exit(EXIT_FAILURE);
1149 } else if (pid < 0) {
1150 error_setg_errno(errp, errno, "failed to create child process");
1154 ga_wait_child(pid, &status, &local_err);
1156 error_propagate(errp, local_err);
1160 if (!WIFEXITED(status)) {
1161 error_setg(errp, "fsfreeze hook has terminated abnormally");
1165 status = WEXITSTATUS(status);
1167 error_setg(errp, "fsfreeze hook has failed with status %d", status);
1173 * Return status of freeze/thaw
1175 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
1177 if (ga_is_frozen(ga_state)) {
1178 return GUEST_FSFREEZE_STATUS_FROZEN;
1181 return GUEST_FSFREEZE_STATUS_THAWED;
1184 int64_t qmp_guest_fsfreeze_freeze(Error **errp)
1186 return qmp_guest_fsfreeze_freeze_list(false, NULL, errp);
1190 * Walk list of mounted file systems in the guest, and freeze the ones which
1191 * are real local file systems.
1193 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
1194 strList *mountpoints,
1200 struct FsMount *mount;
1201 Error *local_err = NULL;
1204 slog("guest-fsfreeze called");
1206 execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err);
1208 error_propagate(errp, local_err);
1212 QTAILQ_INIT(&mounts);
1213 build_fs_mount_list(&mounts, &local_err);
1215 error_propagate(errp, local_err);
1219 /* cannot risk guest agent blocking itself on a write in this state */
1220 ga_set_frozen(ga_state);
1222 QTAILQ_FOREACH_REVERSE(mount, &mounts, FsMountList, next) {
1223 /* To issue fsfreeze in the reverse order of mounts, check if the
1224 * mount is listed in the list here */
1225 if (has_mountpoints) {
1226 for (list = mountpoints; list; list = list->next) {
1227 if (strcmp(list->value, mount->dirname) == 0) {
1236 fd = qemu_open(mount->dirname, O_RDONLY);
1238 error_setg_errno(errp, errno, "failed to open %s", mount->dirname);
1242 /* we try to cull filesystems we know won't work in advance, but other
1243 * filesystems may not implement fsfreeze for less obvious reasons.
1244 * these will report EOPNOTSUPP. we simply ignore these when tallying
1245 * the number of frozen filesystems.
1247 * any other error means a failure to freeze a filesystem we
1248 * expect to be freezable, so return an error in those cases
1249 * and return system to thawed state.
1251 ret = ioctl(fd, FIFREEZE);
1253 if (errno != EOPNOTSUPP) {
1254 error_setg_errno(errp, errno, "failed to freeze %s",
1265 free_fs_mount_list(&mounts);
1269 free_fs_mount_list(&mounts);
1270 qmp_guest_fsfreeze_thaw(NULL);
1275 * Walk list of frozen file systems in the guest, and thaw them.
1277 int64_t qmp_guest_fsfreeze_thaw(Error **errp)
1282 int fd, i = 0, logged;
1283 Error *local_err = NULL;
1285 QTAILQ_INIT(&mounts);
1286 build_fs_mount_list(&mounts, &local_err);
1288 error_propagate(errp, local_err);
1292 QTAILQ_FOREACH(mount, &mounts, next) {
1294 fd = qemu_open(mount->dirname, O_RDONLY);
1298 /* we have no way of knowing whether a filesystem was actually unfrozen
1299 * as a result of a successful call to FITHAW, only that if an error
1300 * was returned the filesystem was *not* unfrozen by that particular
1303 * since multiple preceding FIFREEZEs require multiple calls to FITHAW
1304 * to unfreeze, continuing issuing FITHAW until an error is returned,
1305 * in which case either the filesystem is in an unfreezable state, or,
1306 * more likely, it was thawed previously (and remains so afterward).
1308 * also, since the most recent successful call is the one that did
1309 * the actual unfreeze, we can use this to provide an accurate count
1310 * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which
1311 * may * be useful for determining whether a filesystem was unfrozen
1312 * during the freeze/thaw phase by a process other than qemu-ga.
1315 ret = ioctl(fd, FITHAW);
1316 if (ret == 0 && !logged) {
1324 ga_unset_frozen(ga_state);
1325 free_fs_mount_list(&mounts);
1327 execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, errp);
1332 static void guest_fsfreeze_cleanup(void)
1336 if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) {
1337 qmp_guest_fsfreeze_thaw(&err);
1339 slog("failed to clean up frozen filesystems: %s",
1340 error_get_pretty(err));
1345 #endif /* CONFIG_FSFREEZE */
1347 #if defined(CONFIG_FSTRIM)
1349 * Walk list of mounted file systems in the guest, and trim them.
1351 GuestFilesystemTrimResponse *
1352 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
1354 GuestFilesystemTrimResponse *response;
1355 GuestFilesystemTrimResultList *list;
1356 GuestFilesystemTrimResult *result;
1359 struct FsMount *mount;
1361 Error *local_err = NULL;
1362 struct fstrim_range r;
1364 slog("guest-fstrim called");
1366 QTAILQ_INIT(&mounts);
1367 build_fs_mount_list(&mounts, &local_err);
1369 error_propagate(errp, local_err);
1373 response = g_malloc0(sizeof(*response));
1375 QTAILQ_FOREACH(mount, &mounts, next) {
1376 result = g_malloc0(sizeof(*result));
1377 result->path = g_strdup(mount->dirname);
1379 list = g_malloc0(sizeof(*list));
1380 list->value = result;
1381 list->next = response->paths;
1382 response->paths = list;
1384 fd = qemu_open(mount->dirname, O_RDONLY);
1386 result->error = g_strdup_printf("failed to open: %s",
1388 result->has_error = true;
1392 /* We try to cull filesystems we know won't work in advance, but other
1393 * filesystems may not implement fstrim for less obvious reasons.
1394 * These will report EOPNOTSUPP; while in some other cases ENOTTY
1395 * will be reported (e.g. CD-ROMs).
1396 * Any other error means an unexpected error.
1400 r.minlen = has_minimum ? minimum : 0;
1401 ret = ioctl(fd, FITRIM, &r);
1403 result->has_error = true;
1404 if (errno == ENOTTY || errno == EOPNOTSUPP) {
1405 result->error = g_strdup("trim not supported");
1407 result->error = g_strdup_printf("failed to trim: %s",
1414 result->has_minimum = true;
1415 result->minimum = r.minlen;
1416 result->has_trimmed = true;
1417 result->trimmed = r.len;
1421 free_fs_mount_list(&mounts);
1424 #endif /* CONFIG_FSTRIM */
1427 #define LINUX_SYS_STATE_FILE "/sys/power/state"
1428 #define SUSPEND_SUPPORTED 0
1429 #define SUSPEND_NOT_SUPPORTED 1
1431 static void bios_supports_mode(const char *pmutils_bin, const char *pmutils_arg,
1432 const char *sysfile_str, Error **errp)
1434 Error *local_err = NULL;
1439 pmutils_path = g_find_program_in_path(pmutils_bin);
1443 char buf[32]; /* hopefully big enough */
1448 reopen_fd_to_null(0);
1449 reopen_fd_to_null(1);
1450 reopen_fd_to_null(2);
1453 execle(pmutils_path, pmutils_bin, pmutils_arg, NULL, environ);
1457 * If we get here either pm-utils is not installed or execle() has
1458 * failed. Let's try the manual method if the caller wants it.
1462 _exit(SUSPEND_NOT_SUPPORTED);
1465 fd = open(LINUX_SYS_STATE_FILE, O_RDONLY);
1467 _exit(SUSPEND_NOT_SUPPORTED);
1470 ret = read(fd, buf, sizeof(buf)-1);
1472 _exit(SUSPEND_NOT_SUPPORTED);
1476 if (strstr(buf, sysfile_str)) {
1477 _exit(SUSPEND_SUPPORTED);
1480 _exit(SUSPEND_NOT_SUPPORTED);
1481 } else if (pid < 0) {
1482 error_setg_errno(errp, errno, "failed to create child process");
1486 ga_wait_child(pid, &status, &local_err);
1488 error_propagate(errp, local_err);
1492 if (!WIFEXITED(status)) {
1493 error_setg(errp, "child process has terminated abnormally");
1497 switch (WEXITSTATUS(status)) {
1498 case SUSPEND_SUPPORTED:
1500 case SUSPEND_NOT_SUPPORTED:
1502 "the requested suspend mode is not supported by the guest");
1506 "the helper program '%s' returned an unexpected exit status"
1507 " code (%d)", pmutils_path, WEXITSTATUS(status));
1512 g_free(pmutils_path);
1515 static void guest_suspend(const char *pmutils_bin, const char *sysfile_str,
1518 Error *local_err = NULL;
1523 pmutils_path = g_find_program_in_path(pmutils_bin);
1531 reopen_fd_to_null(0);
1532 reopen_fd_to_null(1);
1533 reopen_fd_to_null(2);
1536 execle(pmutils_path, pmutils_bin, NULL, environ);
1540 * If we get here either pm-utils is not installed or execle() has
1541 * failed. Let's try the manual method if the caller wants it.
1545 _exit(EXIT_FAILURE);
1548 fd = open(LINUX_SYS_STATE_FILE, O_WRONLY);
1550 _exit(EXIT_FAILURE);
1553 if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) {
1554 _exit(EXIT_FAILURE);
1557 _exit(EXIT_SUCCESS);
1558 } else if (pid < 0) {
1559 error_setg_errno(errp, errno, "failed to create child process");
1563 ga_wait_child(pid, &status, &local_err);
1565 error_propagate(errp, local_err);
1569 if (!WIFEXITED(status)) {
1570 error_setg(errp, "child process has terminated abnormally");
1574 if (WEXITSTATUS(status)) {
1575 error_setg(errp, "child process has failed to suspend");
1580 g_free(pmutils_path);
1583 void qmp_guest_suspend_disk(Error **errp)
1585 Error *local_err = NULL;
1587 bios_supports_mode("pm-is-supported", "--hibernate", "disk", &local_err);
1589 error_propagate(errp, local_err);
1593 guest_suspend("pm-hibernate", "disk", errp);
1596 void qmp_guest_suspend_ram(Error **errp)
1598 Error *local_err = NULL;
1600 bios_supports_mode("pm-is-supported", "--suspend", "mem", &local_err);
1602 error_propagate(errp, local_err);
1606 guest_suspend("pm-suspend", "mem", errp);
1609 void qmp_guest_suspend_hybrid(Error **errp)
1611 Error *local_err = NULL;
1613 bios_supports_mode("pm-is-supported", "--suspend-hybrid", NULL,
1616 error_propagate(errp, local_err);
1620 guest_suspend("pm-suspend-hybrid", NULL, errp);
1623 static GuestNetworkInterfaceList *
1624 guest_find_interface(GuestNetworkInterfaceList *head,
1627 for (; head; head = head->next) {
1628 if (strcmp(head->value->name, name) == 0) {
1637 * Build information about guest interfaces
1639 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
1641 GuestNetworkInterfaceList *head = NULL, *cur_item = NULL;
1642 struct ifaddrs *ifap, *ifa;
1644 if (getifaddrs(&ifap) < 0) {
1645 error_setg_errno(errp, errno, "getifaddrs failed");
1649 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1650 GuestNetworkInterfaceList *info;
1651 GuestIpAddressList **address_list = NULL, *address_item = NULL;
1652 char addr4[INET_ADDRSTRLEN];
1653 char addr6[INET6_ADDRSTRLEN];
1656 unsigned char *mac_addr;
1659 g_debug("Processing %s interface", ifa->ifa_name);
1661 info = guest_find_interface(head, ifa->ifa_name);
1664 info = g_malloc0(sizeof(*info));
1665 info->value = g_malloc0(sizeof(*info->value));
1666 info->value->name = g_strdup(ifa->ifa_name);
1669 head = cur_item = info;
1671 cur_item->next = info;
1676 if (!info->value->has_hardware_address &&
1677 ifa->ifa_flags & SIOCGIFHWADDR) {
1678 /* we haven't obtained HW address yet */
1679 sock = socket(PF_INET, SOCK_STREAM, 0);
1681 error_setg_errno(errp, errno, "failed to create socket");
1685 memset(&ifr, 0, sizeof(ifr));
1686 pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->value->name);
1687 if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) {
1688 error_setg_errno(errp, errno,
1689 "failed to get MAC address of %s",
1696 mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data;
1698 info->value->hardware_address =
1699 g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x",
1700 (int) mac_addr[0], (int) mac_addr[1],
1701 (int) mac_addr[2], (int) mac_addr[3],
1702 (int) mac_addr[4], (int) mac_addr[5]);
1704 info->value->has_hardware_address = true;
1707 if (ifa->ifa_addr &&
1708 ifa->ifa_addr->sa_family == AF_INET) {
1709 /* interface with IPv4 address */
1710 p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
1711 if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) {
1712 error_setg_errno(errp, errno, "inet_ntop failed");
1716 address_item = g_malloc0(sizeof(*address_item));
1717 address_item->value = g_malloc0(sizeof(*address_item->value));
1718 address_item->value->ip_address = g_strdup(addr4);
1719 address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4;
1721 if (ifa->ifa_netmask) {
1722 /* Count the number of set bits in netmask.
1723 * This is safe as '1' and '0' cannot be shuffled in netmask. */
1724 p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr;
1725 address_item->value->prefix = ctpop32(((uint32_t *) p)[0]);
1727 } else if (ifa->ifa_addr &&
1728 ifa->ifa_addr->sa_family == AF_INET6) {
1729 /* interface with IPv6 address */
1730 p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
1731 if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) {
1732 error_setg_errno(errp, errno, "inet_ntop failed");
1736 address_item = g_malloc0(sizeof(*address_item));
1737 address_item->value = g_malloc0(sizeof(*address_item->value));
1738 address_item->value->ip_address = g_strdup(addr6);
1739 address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6;
1741 if (ifa->ifa_netmask) {
1742 /* Count the number of set bits in netmask.
1743 * This is safe as '1' and '0' cannot be shuffled in netmask. */
1744 p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr;
1745 address_item->value->prefix =
1746 ctpop32(((uint32_t *) p)[0]) +
1747 ctpop32(((uint32_t *) p)[1]) +
1748 ctpop32(((uint32_t *) p)[2]) +
1749 ctpop32(((uint32_t *) p)[3]);
1753 if (!address_item) {
1757 address_list = &info->value->ip_addresses;
1759 while (*address_list && (*address_list)->next) {
1760 address_list = &(*address_list)->next;
1763 if (!*address_list) {
1764 *address_list = address_item;
1766 (*address_list)->next = address_item;
1769 info->value->has_ip_addresses = true;
1779 qapi_free_GuestNetworkInterfaceList(head);
1783 #define SYSCONF_EXACT(name, errp) sysconf_exact((name), #name, (errp))
1785 static long sysconf_exact(int name, const char *name_str, Error **errp)
1790 ret = sysconf(name);
1793 error_setg(errp, "sysconf(%s): value indefinite", name_str);
1795 error_setg_errno(errp, errno, "sysconf(%s)", name_str);
1801 /* Transfer online/offline status between @vcpu and the guest system.
1803 * On input either @errp or *@errp must be NULL.
1805 * In system-to-@vcpu direction, the following @vcpu fields are accessed:
1806 * - R: vcpu->logical_id
1808 * - W: vcpu->can_offline
1810 * In @vcpu-to-system direction, the following @vcpu fields are accessed:
1811 * - R: vcpu->logical_id
1814 * Written members remain unmodified on error.
1816 static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu,
1822 dirpath = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/",
1824 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
1826 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
1828 static const char fn[] = "online";
1832 fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR);
1834 if (errno != ENOENT) {
1835 error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn);
1836 } else if (sys2vcpu) {
1837 vcpu->online = true;
1838 vcpu->can_offline = false;
1839 } else if (!vcpu->online) {
1840 error_setg(errp, "logical processor #%" PRId64 " can't be "
1841 "offlined", vcpu->logical_id);
1842 } /* otherwise pretend successful re-onlining */
1844 unsigned char status;
1846 res = pread(fd, &status, 1, 0);
1848 error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn);
1849 } else if (res == 0) {
1850 error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath,
1852 } else if (sys2vcpu) {
1853 vcpu->online = (status != '0');
1854 vcpu->can_offline = true;
1855 } else if (vcpu->online != (status != '0')) {
1856 status = '0' + vcpu->online;
1857 if (pwrite(fd, &status, 1, 0) == -1) {
1858 error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath,
1861 } /* otherwise pretend successful re-(on|off)-lining */
1874 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
1877 GuestLogicalProcessorList *head, **link;
1879 Error *local_err = NULL;
1884 sc_max = SYSCONF_EXACT(_SC_NPROCESSORS_CONF, &local_err);
1886 while (local_err == NULL && current < sc_max) {
1887 GuestLogicalProcessor *vcpu;
1888 GuestLogicalProcessorList *entry;
1890 vcpu = g_malloc0(sizeof *vcpu);
1891 vcpu->logical_id = current++;
1892 vcpu->has_can_offline = true; /* lolspeak ftw */
1893 transfer_vcpu(vcpu, true, &local_err);
1895 entry = g_malloc0(sizeof *entry);
1896 entry->value = vcpu;
1899 link = &entry->next;
1902 if (local_err == NULL) {
1903 /* there's no guest with zero VCPUs */
1904 g_assert(head != NULL);
1908 qapi_free_GuestLogicalProcessorList(head);
1909 error_propagate(errp, local_err);
1913 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
1916 Error *local_err = NULL;
1919 while (vcpus != NULL) {
1920 transfer_vcpu(vcpus->value, false, &local_err);
1921 if (local_err != NULL) {
1925 vcpus = vcpus->next;
1928 if (local_err != NULL) {
1929 if (processed == 0) {
1930 error_propagate(errp, local_err);
1932 error_free(local_err);
1939 void qmp_guest_set_user_password(const char *username,
1940 const char *password,
1944 Error *local_err = NULL;
1945 char *passwd_path = NULL;
1948 int datafd[2] = { -1, -1 };
1949 char *rawpasswddata = NULL;
1950 size_t rawpasswdlen;
1951 char *chpasswddata = NULL;
1954 rawpasswddata = (char *)qbase64_decode(password, -1, &rawpasswdlen, errp);
1955 if (!rawpasswddata) {
1958 rawpasswddata = g_renew(char, rawpasswddata, rawpasswdlen + 1);
1959 rawpasswddata[rawpasswdlen] = '\0';
1961 if (strchr(rawpasswddata, '\n')) {
1962 error_setg(errp, "forbidden characters in raw password");
1966 if (strchr(username, '\n') ||
1967 strchr(username, ':')) {
1968 error_setg(errp, "forbidden characters in username");
1972 chpasswddata = g_strdup_printf("%s:%s\n", username, rawpasswddata);
1973 chpasswdlen = strlen(chpasswddata);
1975 passwd_path = g_find_program_in_path("chpasswd");
1978 error_setg(errp, "cannot find 'passwd' program in PATH");
1982 if (pipe(datafd) < 0) {
1983 error_setg(errp, "cannot create pipe FDs");
1993 reopen_fd_to_null(1);
1994 reopen_fd_to_null(2);
1997 execle(passwd_path, "chpasswd", "-e", NULL, environ);
1999 execle(passwd_path, "chpasswd", NULL, environ);
2001 _exit(EXIT_FAILURE);
2002 } else if (pid < 0) {
2003 error_setg_errno(errp, errno, "failed to create child process");
2009 if (qemu_write_full(datafd[1], chpasswddata, chpasswdlen) != chpasswdlen) {
2010 error_setg_errno(errp, errno, "cannot write new account password");
2016 ga_wait_child(pid, &status, &local_err);
2018 error_propagate(errp, local_err);
2022 if (!WIFEXITED(status)) {
2023 error_setg(errp, "child process has terminated abnormally");
2027 if (WEXITSTATUS(status)) {
2028 error_setg(errp, "child process has failed to set user password");
2033 g_free(chpasswddata);
2034 g_free(rawpasswddata);
2035 g_free(passwd_path);
2036 if (datafd[0] != -1) {
2039 if (datafd[1] != -1) {
2044 static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf,
2045 int size, Error **errp)
2051 fd = openat(dirfd, pathname, O_RDONLY);
2053 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname);
2057 res = pread(fd, buf, size, 0);
2059 error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname);
2060 } else if (res == 0) {
2061 error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname);
2066 static void ga_write_sysfs_file(int dirfd, const char *pathname,
2067 const char *buf, int size, Error **errp)
2072 fd = openat(dirfd, pathname, O_WRONLY);
2074 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname);
2078 if (pwrite(fd, buf, size, 0) == -1) {
2079 error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname);
2085 /* Transfer online/offline status between @mem_blk and the guest system.
2087 * On input either @errp or *@errp must be NULL.
2089 * In system-to-@mem_blk direction, the following @mem_blk fields are accessed:
2090 * - R: mem_blk->phys_index
2091 * - W: mem_blk->online
2092 * - W: mem_blk->can_offline
2094 * In @mem_blk-to-system direction, the following @mem_blk fields are accessed:
2095 * - R: mem_blk->phys_index
2096 * - R: mem_blk->online
2097 *- R: mem_blk->can_offline
2098 * Written members remain unmodified on error.
2100 static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk,
2101 GuestMemoryBlockResponse *result,
2107 Error *local_err = NULL;
2113 error_setg(errp, "Internal error, 'result' should not be NULL");
2117 dp = opendir("/sys/devices/system/memory/");
2118 /* if there is no 'memory' directory in sysfs,
2119 * we think this VM does not support online/offline memory block,
2120 * any other solution?
2122 if (!dp && errno == ENOENT) {
2124 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED;
2130 dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/",
2131 mem_blk->phys_index);
2132 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2135 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2137 if (errno == ENOENT) {
2138 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND;
2141 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2149 status = g_malloc0(10);
2150 ga_read_sysfs_file(dirfd, "state", status, 10, &local_err);
2152 /* treat with sysfs file that not exist in old kernel */
2153 if (errno == ENOENT) {
2154 error_free(local_err);
2156 mem_blk->online = true;
2157 mem_blk->can_offline = false;
2158 } else if (!mem_blk->online) {
2160 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED;
2164 error_propagate(errp, local_err);
2167 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2174 char removable = '0';
2176 mem_blk->online = (strncmp(status, "online", 6) == 0);
2178 ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err);
2180 /* if no 'removable' file, it doesn't support offline mem blk */
2181 if (errno == ENOENT) {
2182 error_free(local_err);
2183 mem_blk->can_offline = false;
2185 error_propagate(errp, local_err);
2188 mem_blk->can_offline = (removable != '0');
2191 if (mem_blk->online != (strncmp(status, "online", 6) == 0)) {
2192 char *new_state = mem_blk->online ? g_strdup("online") :
2193 g_strdup("offline");
2195 ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state),
2199 error_free(local_err);
2201 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2205 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS;
2206 result->has_error_code = false;
2207 } /* otherwise pretend successful re-(on|off)-lining */
2218 result->has_error_code = true;
2219 result->error_code = errno;
2223 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp)
2225 GuestMemoryBlockList *head, **link;
2226 Error *local_err = NULL;
2233 dp = opendir("/sys/devices/system/memory/");
2235 /* it's ok if this happens to be a system that doesn't expose
2236 * memory blocks via sysfs, but otherwise we should report
2239 if (errno != ENOENT) {
2240 error_setg_errno(errp, errno, "Can't open directory"
2241 "\"/sys/devices/system/memory/\"");
2246 /* Note: the phys_index of memory block may be discontinuous,
2247 * this is because a memblk is the unit of the Sparse Memory design, which
2248 * allows discontinuous memory ranges (ex. NUMA), so here we should
2249 * traverse the memory block directory.
2251 while ((de = readdir(dp)) != NULL) {
2252 GuestMemoryBlock *mem_blk;
2253 GuestMemoryBlockList *entry;
2255 if ((strncmp(de->d_name, "memory", 6) != 0) ||
2256 !(de->d_type & DT_DIR)) {
2260 mem_blk = g_malloc0(sizeof *mem_blk);
2261 /* The d_name is "memoryXXX", phys_index is block id, same as XXX */
2262 mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10);
2263 mem_blk->has_can_offline = true; /* lolspeak ftw */
2264 transfer_memory_block(mem_blk, true, NULL, &local_err);
2266 entry = g_malloc0(sizeof *entry);
2267 entry->value = mem_blk;
2270 link = &entry->next;
2274 if (local_err == NULL) {
2275 /* there's no guest with zero memory blocks */
2277 error_setg(errp, "guest reported zero memory blocks!");
2282 qapi_free_GuestMemoryBlockList(head);
2283 error_propagate(errp, local_err);
2287 GuestMemoryBlockResponseList *
2288 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp)
2290 GuestMemoryBlockResponseList *head, **link;
2291 Error *local_err = NULL;
2296 while (mem_blks != NULL) {
2297 GuestMemoryBlockResponse *result;
2298 GuestMemoryBlockResponseList *entry;
2299 GuestMemoryBlock *current_mem_blk = mem_blks->value;
2301 result = g_malloc0(sizeof(*result));
2302 result->phys_index = current_mem_blk->phys_index;
2303 transfer_memory_block(current_mem_blk, false, result, &local_err);
2304 if (local_err) { /* should never happen */
2307 entry = g_malloc0(sizeof *entry);
2308 entry->value = result;
2311 link = &entry->next;
2312 mem_blks = mem_blks->next;
2317 qapi_free_GuestMemoryBlockResponseList(head);
2318 error_propagate(errp, local_err);
2322 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp)
2324 Error *local_err = NULL;
2328 GuestMemoryBlockInfo *info;
2330 dirpath = g_strdup_printf("/sys/devices/system/memory/");
2331 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2333 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2339 buf = g_malloc0(20);
2340 ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err);
2344 error_propagate(errp, local_err);
2348 info = g_new0(GuestMemoryBlockInfo, 1);
2349 info->size = strtol(buf, NULL, 16); /* the unit is bytes */
2356 #else /* defined(__linux__) */
2358 void qmp_guest_suspend_disk(Error **errp)
2360 error_setg(errp, QERR_UNSUPPORTED);
2363 void qmp_guest_suspend_ram(Error **errp)
2365 error_setg(errp, QERR_UNSUPPORTED);
2368 void qmp_guest_suspend_hybrid(Error **errp)
2370 error_setg(errp, QERR_UNSUPPORTED);
2373 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
2375 error_setg(errp, QERR_UNSUPPORTED);
2379 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
2381 error_setg(errp, QERR_UNSUPPORTED);
2385 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
2387 error_setg(errp, QERR_UNSUPPORTED);
2391 void qmp_guest_set_user_password(const char *username,
2392 const char *password,
2396 error_setg(errp, QERR_UNSUPPORTED);
2399 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp)
2401 error_setg(errp, QERR_UNSUPPORTED);
2405 GuestMemoryBlockResponseList *
2406 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp)
2408 error_setg(errp, QERR_UNSUPPORTED);
2412 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp)
2414 error_setg(errp, QERR_UNSUPPORTED);
2420 #if !defined(CONFIG_FSFREEZE)
2422 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
2424 error_setg(errp, QERR_UNSUPPORTED);
2428 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
2430 error_setg(errp, QERR_UNSUPPORTED);
2435 int64_t qmp_guest_fsfreeze_freeze(Error **errp)
2437 error_setg(errp, QERR_UNSUPPORTED);
2442 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
2443 strList *mountpoints,
2446 error_setg(errp, QERR_UNSUPPORTED);
2451 int64_t qmp_guest_fsfreeze_thaw(Error **errp)
2453 error_setg(errp, QERR_UNSUPPORTED);
2457 #endif /* CONFIG_FSFREEZE */
2459 #if !defined(CONFIG_FSTRIM)
2460 GuestFilesystemTrimResponse *
2461 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
2463 error_setg(errp, QERR_UNSUPPORTED);
2468 /* add unsupported commands to the blacklist */
2469 GList *ga_command_blacklist_init(GList *blacklist)
2471 #if !defined(__linux__)
2473 const char *list[] = {
2474 "guest-suspend-disk", "guest-suspend-ram",
2475 "guest-suspend-hybrid", "guest-network-get-interfaces",
2476 "guest-get-vcpus", "guest-set-vcpus",
2477 "guest-get-memory-blocks", "guest-set-memory-blocks",
2478 "guest-get-memory-block-size", NULL};
2479 char **p = (char **)list;
2482 blacklist = g_list_append(blacklist, g_strdup(*p++));
2487 #if !defined(CONFIG_FSFREEZE)
2489 const char *list[] = {
2490 "guest-get-fsinfo", "guest-fsfreeze-status",
2491 "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list",
2492 "guest-fsfreeze-thaw", "guest-get-fsinfo", NULL};
2493 char **p = (char **)list;
2496 blacklist = g_list_append(blacklist, g_strdup(*p++));
2501 #if !defined(CONFIG_FSTRIM)
2502 blacklist = g_list_append(blacklist, g_strdup("guest-fstrim"));
2508 /* register init/cleanup routines for stateful command groups */
2509 void ga_command_state_init(GAState *s, GACommandState *cs)
2511 #if defined(CONFIG_FSFREEZE)
2512 ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup);