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 "guest-agent-core.h"
20 #include "qga-qapi-commands.h"
21 #include "qapi/error.h"
22 #include "qapi/qmp/qerror.h"
23 #include "qemu/queue.h"
24 #include "qemu/host-utils.h"
25 #include "qemu/sockets.h"
26 #include "qemu/base64.h"
27 #include "qemu/cutils.h"
33 #ifndef CONFIG_HAS_ENVIRON
35 #include <crt_externs.h>
36 #define environ (*_NSGetEnviron())
38 extern char **environ;
42 #if defined(__linux__)
46 #include <arpa/inet.h>
47 #include <sys/socket.h>
49 #include <sys/statvfs.h>
52 #define CONFIG_FSFREEZE
59 static void ga_wait_child(pid_t pid, int *status, Error **errp)
66 rpid = waitpid(pid, status, 0);
67 } while (rpid == -1 && errno == EINTR);
70 error_setg_errno(errp, errno, "failed to wait for child (pid: %d)",
75 g_assert(rpid == pid);
78 void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp)
80 const char *shutdown_flag;
81 Error *local_err = NULL;
85 slog("guest-shutdown called, mode: %s", mode);
86 if (!has_mode || strcmp(mode, "powerdown") == 0) {
88 } else if (strcmp(mode, "halt") == 0) {
90 } else if (strcmp(mode, "reboot") == 0) {
94 "mode is invalid (valid values are: halt|powerdown|reboot");
100 /* child, start the shutdown */
102 reopen_fd_to_null(0);
103 reopen_fd_to_null(1);
104 reopen_fd_to_null(2);
106 execle("/sbin/shutdown", "shutdown", "-h", shutdown_flag, "+0",
107 "hypervisor initiated shutdown", (char*)NULL, environ);
109 } else if (pid < 0) {
110 error_setg_errno(errp, errno, "failed to create child process");
114 ga_wait_child(pid, &status, &local_err);
116 error_propagate(errp, local_err);
120 if (!WIFEXITED(status)) {
121 error_setg(errp, "child process has terminated abnormally");
125 if (WEXITSTATUS(status)) {
126 error_setg(errp, "child process has failed to shutdown");
133 int64_t qmp_guest_get_time(Error **errp)
138 ret = qemu_gettimeofday(&tq);
140 error_setg_errno(errp, errno, "Failed to get time");
144 return tq.tv_sec * 1000000000LL + tq.tv_usec * 1000;
147 void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp)
152 Error *local_err = NULL;
155 /* If user has passed a time, validate and set it. */
159 /* year-2038 will overflow in case time_t is 32bit */
160 if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) {
161 error_setg(errp, "Time %" PRId64 " is too large", time_ns);
165 tv.tv_sec = time_ns / 1000000000;
166 tv.tv_usec = (time_ns % 1000000000) / 1000;
167 g_date_set_time_t(&date, tv.tv_sec);
168 if (date.year < 1970 || date.year >= 2070) {
169 error_setg_errno(errp, errno, "Invalid time");
173 ret = settimeofday(&tv, NULL);
175 error_setg_errno(errp, errno, "Failed to set time to guest");
180 /* Now, if user has passed a time to set and the system time is set, we
181 * just need to synchronize the hardware clock. However, if no time was
182 * passed, user is requesting the opposite: set the system time from the
183 * hardware clock (RTC). */
187 reopen_fd_to_null(0);
188 reopen_fd_to_null(1);
189 reopen_fd_to_null(2);
191 /* Use '/sbin/hwclock -w' to set RTC from the system time,
192 * or '/sbin/hwclock -s' to set the system time from RTC. */
193 execle("/sbin/hwclock", "hwclock", has_time ? "-w" : "-s",
196 } else if (pid < 0) {
197 error_setg_errno(errp, errno, "failed to create child process");
201 ga_wait_child(pid, &status, &local_err);
203 error_propagate(errp, local_err);
207 if (!WIFEXITED(status)) {
208 error_setg(errp, "child process has terminated abnormally");
212 if (WEXITSTATUS(status)) {
213 error_setg(errp, "hwclock failed to set hardware clock to system time");
224 typedef struct GuestFileHandle {
228 QTAILQ_ENTRY(GuestFileHandle) next;
232 QTAILQ_HEAD(, GuestFileHandle) filehandles;
233 } guest_file_state = {
234 .filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles),
237 static int64_t guest_file_handle_add(FILE *fh, Error **errp)
239 GuestFileHandle *gfh;
242 handle = ga_get_fd_handle(ga_state, errp);
247 gfh = g_new0(GuestFileHandle, 1);
250 QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next);
255 static GuestFileHandle *guest_file_handle_find(int64_t id, Error **errp)
257 GuestFileHandle *gfh;
259 QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next)
266 error_setg(errp, "handle '%" PRId64 "' has not been found", id);
270 typedef const char * const ccpc;
276 /* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */
277 static const struct {
280 } guest_file_open_modes[] = {
281 { (ccpc[]){ "r", NULL }, O_RDONLY },
282 { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY },
283 { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC },
284 { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY },
285 { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND },
286 { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY },
287 { (ccpc[]){ "r+", NULL }, O_RDWR },
288 { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY },
289 { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC },
290 { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY },
291 { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND },
292 { (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY }
296 find_open_flag(const char *mode_str, Error **errp)
300 for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) {
303 form = guest_file_open_modes[mode].forms;
304 while (*form != NULL && strcmp(*form, mode_str) != 0) {
312 if (mode == ARRAY_SIZE(guest_file_open_modes)) {
313 error_setg(errp, "invalid file open mode '%s'", mode_str);
316 return guest_file_open_modes[mode].oflag_base | O_NOCTTY | O_NONBLOCK;
319 #define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \
320 S_IRGRP | S_IWGRP | \
324 safe_open_or_create(const char *path, const char *mode, Error **errp)
326 Error *local_err = NULL;
329 oflag = find_open_flag(mode, &local_err);
330 if (local_err == NULL) {
333 /* If the caller wants / allows creation of a new file, we implement it
334 * with a two step process: open() + (open() / fchmod()).
336 * First we insist on creating the file exclusively as a new file. If
337 * that succeeds, we're free to set any file-mode bits on it. (The
338 * motivation is that we want to set those file-mode bits independently
339 * of the current umask.)
341 * If the exclusive creation fails because the file already exists
342 * (EEXIST is not possible for any other reason), we just attempt to
343 * open the file, but in this case we won't be allowed to change the
344 * file-mode bits on the preexistent file.
346 * The pathname should never disappear between the two open()s in
347 * practice. If it happens, then someone very likely tried to race us.
348 * In this case just go ahead and report the ENOENT from the second
349 * open() to the caller.
351 * If the caller wants to open a preexistent file, then the first
352 * open() is decisive and its third argument is ignored, and the second
353 * open() and the fchmod() are never called.
355 fd = open(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0);
356 if (fd == -1 && errno == EEXIST) {
357 oflag &= ~(unsigned)O_CREAT;
358 fd = open(path, oflag);
362 error_setg_errno(&local_err, errno, "failed to open file '%s' "
363 "(mode: '%s')", path, mode);
365 qemu_set_cloexec(fd);
367 if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) {
368 error_setg_errno(&local_err, errno, "failed to set permission "
369 "0%03o on new file '%s' (mode: '%s')",
370 (unsigned)DEFAULT_NEW_FILE_MODE, path, mode);
374 f = fdopen(fd, mode);
376 error_setg_errno(&local_err, errno, "failed to associate "
377 "stdio stream with file descriptor %d, "
378 "file '%s' (mode: '%s')", fd, path, mode);
385 if (oflag & O_CREAT) {
391 error_propagate(errp, local_err);
395 int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode,
399 Error *local_err = NULL;
405 slog("guest-file-open called, filepath: %s, mode: %s", path, mode);
406 fh = safe_open_or_create(path, mode, &local_err);
407 if (local_err != NULL) {
408 error_propagate(errp, local_err);
412 /* set fd non-blocking to avoid common use cases (like reading from a
413 * named pipe) from hanging the agent
415 qemu_set_nonblock(fileno(fh));
417 handle = guest_file_handle_add(fh, errp);
423 slog("guest-file-open, handle: %" PRId64, handle);
427 void qmp_guest_file_close(int64_t handle, Error **errp)
429 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
432 slog("guest-file-close called, handle: %" PRId64, handle);
437 ret = fclose(gfh->fh);
439 error_setg_errno(errp, errno, "failed to close handle");
443 QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next);
447 struct GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count,
448 int64_t count, Error **errp)
450 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
451 GuestFileRead *read_data = NULL;
461 count = QGA_READ_COUNT_DEFAULT;
462 } else if (count < 0 || count >= UINT32_MAX) {
463 error_setg(errp, "value '%" PRId64 "' is invalid for argument count",
470 /* explicitly flush when switching from writing to reading */
471 if (gfh->state == RW_STATE_WRITING) {
472 int ret = fflush(fh);
474 error_setg_errno(errp, errno, "failed to flush file");
477 gfh->state = RW_STATE_NEW;
480 buf = g_malloc0(count+1);
481 read_count = fread(buf, 1, count, fh);
483 error_setg_errno(errp, errno, "failed to read file");
484 slog("guest-file-read failed, handle: %" PRId64, handle);
487 read_data = g_new0(GuestFileRead, 1);
488 read_data->count = read_count;
489 read_data->eof = feof(fh);
491 read_data->buf_b64 = g_base64_encode(buf, read_count);
493 gfh->state = RW_STATE_READING;
501 GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64,
502 bool has_count, int64_t count,
505 GuestFileWrite *write_data = NULL;
509 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
518 if (gfh->state == RW_STATE_READING) {
519 int ret = fseek(fh, 0, SEEK_CUR);
521 error_setg_errno(errp, errno, "failed to seek file");
524 gfh->state = RW_STATE_NEW;
527 buf = qbase64_decode(buf_b64, -1, &buf_len, errp);
534 } else if (count < 0 || count > buf_len) {
535 error_setg(errp, "value '%" PRId64 "' is invalid for argument count",
541 write_count = fwrite(buf, 1, count, fh);
543 error_setg_errno(errp, errno, "failed to write to file");
544 slog("guest-file-write failed, handle: %" PRId64, handle);
546 write_data = g_new0(GuestFileWrite, 1);
547 write_data->count = write_count;
548 write_data->eof = feof(fh);
549 gfh->state = RW_STATE_WRITING;
557 struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset,
558 GuestFileWhence *whence_code,
561 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
562 GuestFileSeek *seek_data = NULL;
572 /* We stupidly exposed 'whence':'int' in our qapi */
573 whence = ga_parse_whence(whence_code, &err);
575 error_propagate(errp, err);
580 ret = fseek(fh, offset, whence);
582 error_setg_errno(errp, errno, "failed to seek file");
583 if (errno == ESPIPE) {
584 /* file is non-seekable, stdio shouldn't be buffering anyways */
585 gfh->state = RW_STATE_NEW;
588 seek_data = g_new0(GuestFileSeek, 1);
589 seek_data->position = ftell(fh);
590 seek_data->eof = feof(fh);
591 gfh->state = RW_STATE_NEW;
598 void qmp_guest_file_flush(int64_t handle, Error **errp)
600 GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
611 error_setg_errno(errp, errno, "failed to flush file");
613 gfh->state = RW_STATE_NEW;
617 /* linux-specific implementations. avoid this if at all possible. */
618 #if defined(__linux__)
620 #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM)
621 typedef struct FsMount {
624 unsigned int devmajor, devminor;
625 QTAILQ_ENTRY(FsMount) next;
628 typedef QTAILQ_HEAD(FsMountList, FsMount) FsMountList;
630 static void free_fs_mount_list(FsMountList *mounts)
632 FsMount *mount, *temp;
638 QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) {
639 QTAILQ_REMOVE(mounts, mount, next);
640 g_free(mount->dirname);
641 g_free(mount->devtype);
646 static int dev_major_minor(const char *devpath,
647 unsigned int *devmajor, unsigned int *devminor)
654 if (stat(devpath, &st) < 0) {
655 slog("failed to stat device file '%s': %s", devpath, strerror(errno));
658 if (S_ISDIR(st.st_mode)) {
659 /* It is bind mount */
662 if (S_ISBLK(st.st_mode)) {
663 *devmajor = major(st.st_rdev);
664 *devminor = minor(st.st_rdev);
671 * Walk the mount table and build a list of local file systems
673 static void build_fs_mount_list_from_mtab(FsMountList *mounts, Error **errp)
677 char const *mtab = "/proc/self/mounts";
679 unsigned int devmajor, devminor;
681 fp = setmntent(mtab, "r");
683 error_setg(errp, "failed to open mtab file: '%s'", mtab);
687 while ((ment = getmntent(fp))) {
689 * An entry which device name doesn't start with a '/' is
690 * either a dummy file system or a network file system.
691 * Add special handling for smbfs and cifs as is done by
694 if ((ment->mnt_fsname[0] != '/') ||
695 (strcmp(ment->mnt_type, "smbfs") == 0) ||
696 (strcmp(ment->mnt_type, "cifs") == 0)) {
699 if (dev_major_minor(ment->mnt_fsname, &devmajor, &devminor) == -2) {
700 /* Skip bind mounts */
704 mount = g_new0(FsMount, 1);
705 mount->dirname = g_strdup(ment->mnt_dir);
706 mount->devtype = g_strdup(ment->mnt_type);
707 mount->devmajor = devmajor;
708 mount->devminor = devminor;
710 QTAILQ_INSERT_TAIL(mounts, mount, next);
716 static void decode_mntname(char *name, int len)
719 for (i = 0; i <= len; i++) {
720 if (name[i] != '\\') {
722 } else if (name[i + 1] == '\\') {
725 } else if (name[i + 1] >= '0' && name[i + 1] <= '3' &&
726 name[i + 2] >= '0' && name[i + 2] <= '7' &&
727 name[i + 3] >= '0' && name[i + 3] <= '7') {
728 name[j++] = (name[i + 1] - '0') * 64 +
729 (name[i + 2] - '0') * 8 +
738 static void build_fs_mount_list(FsMountList *mounts, Error **errp)
741 char const *mountinfo = "/proc/self/mountinfo";
743 char *line = NULL, *dash;
746 unsigned int devmajor, devminor;
747 int ret, dir_s, dir_e, type_s, type_e, dev_s, dev_e;
749 fp = fopen(mountinfo, "r");
751 build_fs_mount_list_from_mtab(mounts, errp);
755 while (getline(&line, &n, fp) != -1) {
756 ret = sscanf(line, "%*u %*u %u:%u %*s %n%*s%n%c",
757 &devmajor, &devminor, &dir_s, &dir_e, &check);
761 dash = strstr(line + dir_e, " - ");
765 ret = sscanf(dash, " - %n%*s%n %n%*s%n%c",
766 &type_s, &type_e, &dev_s, &dev_e, &check);
773 decode_mntname(line + dir_s, dir_e - dir_s);
774 decode_mntname(dash + dev_s, dev_e - dev_s);
776 /* btrfs reports major number = 0 */
777 if (strcmp("btrfs", dash + type_s) != 0 ||
778 dev_major_minor(dash + dev_s, &devmajor, &devminor) < 0) {
783 mount = g_new0(FsMount, 1);
784 mount->dirname = g_strdup(line + dir_s);
785 mount->devtype = g_strdup(dash + type_s);
786 mount->devmajor = devmajor;
787 mount->devminor = devminor;
789 QTAILQ_INSERT_TAIL(mounts, mount, next);
797 #if defined(CONFIG_FSFREEZE)
799 static char *get_pci_driver(char const *syspath, int pathlen, Error **errp)
807 path = g_strndup(syspath, pathlen);
808 dpath = g_strdup_printf("%s/driver", path);
809 len = readlink(dpath, buf, sizeof(buf) - 1);
812 driver = g_path_get_basename(buf);
819 static int compare_uint(const void *_a, const void *_b)
821 unsigned int a = *(unsigned int *)_a;
822 unsigned int b = *(unsigned int *)_b;
824 return a < b ? -1 : a > b ? 1 : 0;
827 /* Walk the specified sysfs and build a sorted list of host or ata numbers */
828 static int build_hosts(char const *syspath, char const *host, bool ata,
829 unsigned int *hosts, int hosts_max, Error **errp)
833 struct dirent *entry;
836 path = g_strndup(syspath, host - syspath);
839 error_setg_errno(errp, errno, "opendir(\"%s\")", path);
844 while (i < hosts_max) {
845 entry = readdir(dir);
849 if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) {
851 } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) {
856 qsort(hosts, i, sizeof(hosts[0]), compare_uint);
863 /* Store disk device info specified by @sysfs into @fs */
864 static void build_guest_fsinfo_for_real_device(char const *syspath,
865 GuestFilesystemInfo *fs,
868 unsigned int pci[4], host, hosts[8], tgt[3];
869 int i, nhosts = 0, pcilen;
870 GuestDiskAddress *disk;
871 GuestPCIAddress *pciaddr;
872 GuestDiskAddressList *list = NULL;
873 bool has_ata = false, has_host = false, has_tgt = false;
874 char *p, *q, *driver = NULL;
876 p = strstr(syspath, "/devices/pci");
877 if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n",
878 pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) {
879 g_debug("only pci device is supported: sysfs path '%s'", syspath);
885 driver = get_pci_driver(syspath, p - syspath, errp);
886 if (driver && (g_str_equal(driver, "ata_piix") ||
887 g_str_equal(driver, "sym53c8xx") ||
888 g_str_equal(driver, "virtio-pci") ||
889 g_str_equal(driver, "ahci"))) {
893 if (sscanf(p, "/%x:%x:%x.%x%n",
894 pci, pci + 1, pci + 2, pci + 3, &pcilen) == 4) {
899 g_debug("unsupported driver or sysfs path '%s'", syspath);
903 p = strstr(syspath, "/target");
904 if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u",
905 tgt, tgt + 1, tgt + 2) == 3) {
909 p = strstr(syspath, "/ata");
914 p = strstr(syspath, "/host");
917 if (p && sscanf(q, "%u", &host) == 1) {
919 nhosts = build_hosts(syspath, p, has_ata, hosts,
920 ARRAY_SIZE(hosts), errp);
926 pciaddr = g_malloc0(sizeof(*pciaddr));
927 pciaddr->domain = pci[0];
928 pciaddr->bus = pci[1];
929 pciaddr->slot = pci[2];
930 pciaddr->function = pci[3];
932 disk = g_malloc0(sizeof(*disk));
933 disk->pci_controller = pciaddr;
935 list = g_malloc0(sizeof(*list));
938 if (strcmp(driver, "ata_piix") == 0) {
939 /* a host per ide bus, target*:0:<unit>:0 */
940 if (!has_host || !has_tgt) {
941 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
944 for (i = 0; i < nhosts; i++) {
945 if (host == hosts[i]) {
946 disk->bus_type = GUEST_DISK_BUS_TYPE_IDE;
953 g_debug("no host for '%s' (driver '%s')", syspath, driver);
956 } else if (strcmp(driver, "sym53c8xx") == 0) {
957 /* scsi(LSI Logic): target*:0:<unit>:0 */
959 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
962 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
964 } else if (strcmp(driver, "virtio-pci") == 0) {
966 /* virtio-scsi: target*:0:0:<unit> */
967 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI;
970 /* virtio-blk: 1 disk per 1 device */
971 disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO;
973 } else if (strcmp(driver, "ahci") == 0) {
974 /* ahci: 1 host per 1 unit */
975 if (!has_host || !has_tgt) {
976 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver);
979 for (i = 0; i < nhosts; i++) {
980 if (host == hosts[i]) {
982 disk->bus_type = GUEST_DISK_BUS_TYPE_SATA;
987 g_debug("no host for '%s' (driver '%s')", syspath, driver);
991 g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath);
995 list->next = fs->disk;
1002 qapi_free_GuestDiskAddressList(list);
1007 static void build_guest_fsinfo_for_device(char const *devpath,
1008 GuestFilesystemInfo *fs,
1011 /* Store a list of slave devices of virtual volume specified by @syspath into
1013 static void build_guest_fsinfo_for_virtual_device(char const *syspath,
1014 GuestFilesystemInfo *fs,
1019 struct dirent *entry;
1021 dirpath = g_strdup_printf("%s/slaves", syspath);
1022 dir = opendir(dirpath);
1024 if (errno != ENOENT) {
1025 error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath);
1033 entry = readdir(dir);
1034 if (entry == NULL) {
1036 error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath);
1041 if (entry->d_type == DT_LNK) {
1044 g_debug(" slave device '%s'", entry->d_name);
1045 path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name);
1046 build_guest_fsinfo_for_device(path, fs, errp);
1059 /* Dispatch to functions for virtual/real device */
1060 static void build_guest_fsinfo_for_device(char const *devpath,
1061 GuestFilesystemInfo *fs,
1064 char *syspath = realpath(devpath, NULL);
1067 error_setg_errno(errp, errno, "realpath(\"%s\")", devpath);
1072 fs->name = g_path_get_basename(syspath);
1075 g_debug(" parse sysfs path '%s'", syspath);
1077 if (strstr(syspath, "/devices/virtual/block/")) {
1078 build_guest_fsinfo_for_virtual_device(syspath, fs, errp);
1080 build_guest_fsinfo_for_real_device(syspath, fs, errp);
1086 /* Return a list of the disk device(s)' info which @mount lies on */
1087 static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount,
1090 GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs));
1092 unsigned long used, nonroot_total, fr_size;
1093 char *devpath = g_strdup_printf("/sys/dev/block/%u:%u",
1094 mount->devmajor, mount->devminor);
1096 fs->mountpoint = g_strdup(mount->dirname);
1097 fs->type = g_strdup(mount->devtype);
1098 build_guest_fsinfo_for_device(devpath, fs, errp);
1100 if (statvfs(fs->mountpoint, &buf) == 0) {
1101 fr_size = buf.f_frsize;
1102 used = buf.f_blocks - buf.f_bfree;
1103 nonroot_total = used + buf.f_bavail;
1104 fs->used_bytes = used * fr_size;
1105 fs->total_bytes = nonroot_total * fr_size;
1107 fs->has_total_bytes = true;
1108 fs->has_used_bytes = true;
1116 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
1119 struct FsMount *mount;
1120 GuestFilesystemInfoList *new, *ret = NULL;
1121 Error *local_err = NULL;
1123 QTAILQ_INIT(&mounts);
1124 build_fs_mount_list(&mounts, &local_err);
1126 error_propagate(errp, local_err);
1130 QTAILQ_FOREACH(mount, &mounts, next) {
1131 g_debug("Building guest fsinfo for '%s'", mount->dirname);
1133 new = g_malloc0(sizeof(*ret));
1134 new->value = build_guest_fsinfo(mount, &local_err);
1138 error_propagate(errp, local_err);
1139 qapi_free_GuestFilesystemInfoList(ret);
1145 free_fs_mount_list(&mounts);
1151 FSFREEZE_HOOK_THAW = 0,
1152 FSFREEZE_HOOK_FREEZE,
1155 static const char *fsfreeze_hook_arg_string[] = {
1160 static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **errp)
1165 const char *arg_str = fsfreeze_hook_arg_string[arg];
1166 Error *local_err = NULL;
1168 hook = ga_fsfreeze_hook(ga_state);
1172 if (access(hook, X_OK) != 0) {
1173 error_setg_errno(errp, errno, "can't access fsfreeze hook '%s'", hook);
1177 slog("executing fsfreeze hook with arg '%s'", arg_str);
1181 reopen_fd_to_null(0);
1182 reopen_fd_to_null(1);
1183 reopen_fd_to_null(2);
1185 execle(hook, hook, arg_str, NULL, environ);
1186 _exit(EXIT_FAILURE);
1187 } else if (pid < 0) {
1188 error_setg_errno(errp, errno, "failed to create child process");
1192 ga_wait_child(pid, &status, &local_err);
1194 error_propagate(errp, local_err);
1198 if (!WIFEXITED(status)) {
1199 error_setg(errp, "fsfreeze hook has terminated abnormally");
1203 status = WEXITSTATUS(status);
1205 error_setg(errp, "fsfreeze hook has failed with status %d", status);
1211 * Return status of freeze/thaw
1213 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
1215 if (ga_is_frozen(ga_state)) {
1216 return GUEST_FSFREEZE_STATUS_FROZEN;
1219 return GUEST_FSFREEZE_STATUS_THAWED;
1222 int64_t qmp_guest_fsfreeze_freeze(Error **errp)
1224 return qmp_guest_fsfreeze_freeze_list(false, NULL, errp);
1228 * Walk list of mounted file systems in the guest, and freeze the ones which
1229 * are real local file systems.
1231 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
1232 strList *mountpoints,
1238 struct FsMount *mount;
1239 Error *local_err = NULL;
1242 slog("guest-fsfreeze called");
1244 execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err);
1246 error_propagate(errp, local_err);
1250 QTAILQ_INIT(&mounts);
1251 build_fs_mount_list(&mounts, &local_err);
1253 error_propagate(errp, local_err);
1257 /* cannot risk guest agent blocking itself on a write in this state */
1258 ga_set_frozen(ga_state);
1260 QTAILQ_FOREACH_REVERSE(mount, &mounts, FsMountList, next) {
1261 /* To issue fsfreeze in the reverse order of mounts, check if the
1262 * mount is listed in the list here */
1263 if (has_mountpoints) {
1264 for (list = mountpoints; list; list = list->next) {
1265 if (strcmp(list->value, mount->dirname) == 0) {
1274 fd = qemu_open(mount->dirname, O_RDONLY);
1276 error_setg_errno(errp, errno, "failed to open %s", mount->dirname);
1280 /* we try to cull filesystems we know won't work in advance, but other
1281 * filesystems may not implement fsfreeze for less obvious reasons.
1282 * these will report EOPNOTSUPP. we simply ignore these when tallying
1283 * the number of frozen filesystems.
1284 * if a filesystem is mounted more than once (aka bind mount) a
1285 * consecutive attempt to freeze an already frozen filesystem will
1288 * any other error means a failure to freeze a filesystem we
1289 * expect to be freezable, so return an error in those cases
1290 * and return system to thawed state.
1292 ret = ioctl(fd, FIFREEZE);
1294 if (errno != EOPNOTSUPP && errno != EBUSY) {
1295 error_setg_errno(errp, errno, "failed to freeze %s",
1306 free_fs_mount_list(&mounts);
1307 /* We may not issue any FIFREEZE here.
1308 * Just unset ga_state here and ready for the next call.
1311 ga_unset_frozen(ga_state);
1316 free_fs_mount_list(&mounts);
1317 qmp_guest_fsfreeze_thaw(NULL);
1322 * Walk list of frozen file systems in the guest, and thaw them.
1324 int64_t qmp_guest_fsfreeze_thaw(Error **errp)
1329 int fd, i = 0, logged;
1330 Error *local_err = NULL;
1332 QTAILQ_INIT(&mounts);
1333 build_fs_mount_list(&mounts, &local_err);
1335 error_propagate(errp, local_err);
1339 QTAILQ_FOREACH(mount, &mounts, next) {
1341 fd = qemu_open(mount->dirname, O_RDONLY);
1345 /* we have no way of knowing whether a filesystem was actually unfrozen
1346 * as a result of a successful call to FITHAW, only that if an error
1347 * was returned the filesystem was *not* unfrozen by that particular
1350 * since multiple preceding FIFREEZEs require multiple calls to FITHAW
1351 * to unfreeze, continuing issuing FITHAW until an error is returned,
1352 * in which case either the filesystem is in an unfreezable state, or,
1353 * more likely, it was thawed previously (and remains so afterward).
1355 * also, since the most recent successful call is the one that did
1356 * the actual unfreeze, we can use this to provide an accurate count
1357 * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which
1358 * may * be useful for determining whether a filesystem was unfrozen
1359 * during the freeze/thaw phase by a process other than qemu-ga.
1362 ret = ioctl(fd, FITHAW);
1363 if (ret == 0 && !logged) {
1371 ga_unset_frozen(ga_state);
1372 free_fs_mount_list(&mounts);
1374 execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, errp);
1379 static void guest_fsfreeze_cleanup(void)
1383 if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) {
1384 qmp_guest_fsfreeze_thaw(&err);
1386 slog("failed to clean up frozen filesystems: %s",
1387 error_get_pretty(err));
1392 #endif /* CONFIG_FSFREEZE */
1394 #if defined(CONFIG_FSTRIM)
1396 * Walk list of mounted file systems in the guest, and trim them.
1398 GuestFilesystemTrimResponse *
1399 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
1401 GuestFilesystemTrimResponse *response;
1402 GuestFilesystemTrimResultList *list;
1403 GuestFilesystemTrimResult *result;
1406 struct FsMount *mount;
1408 Error *local_err = NULL;
1409 struct fstrim_range r;
1411 slog("guest-fstrim called");
1413 QTAILQ_INIT(&mounts);
1414 build_fs_mount_list(&mounts, &local_err);
1416 error_propagate(errp, local_err);
1420 response = g_malloc0(sizeof(*response));
1422 QTAILQ_FOREACH(mount, &mounts, next) {
1423 result = g_malloc0(sizeof(*result));
1424 result->path = g_strdup(mount->dirname);
1426 list = g_malloc0(sizeof(*list));
1427 list->value = result;
1428 list->next = response->paths;
1429 response->paths = list;
1431 fd = qemu_open(mount->dirname, O_RDONLY);
1433 result->error = g_strdup_printf("failed to open: %s",
1435 result->has_error = true;
1439 /* We try to cull filesystems we know won't work in advance, but other
1440 * filesystems may not implement fstrim for less obvious reasons.
1441 * These will report EOPNOTSUPP; while in some other cases ENOTTY
1442 * will be reported (e.g. CD-ROMs).
1443 * Any other error means an unexpected error.
1447 r.minlen = has_minimum ? minimum : 0;
1448 ret = ioctl(fd, FITRIM, &r);
1450 result->has_error = true;
1451 if (errno == ENOTTY || errno == EOPNOTSUPP) {
1452 result->error = g_strdup("trim not supported");
1454 result->error = g_strdup_printf("failed to trim: %s",
1461 result->has_minimum = true;
1462 result->minimum = r.minlen;
1463 result->has_trimmed = true;
1464 result->trimmed = r.len;
1468 free_fs_mount_list(&mounts);
1471 #endif /* CONFIG_FSTRIM */
1474 #define LINUX_SYS_STATE_FILE "/sys/power/state"
1475 #define SUSPEND_SUPPORTED 0
1476 #define SUSPEND_NOT_SUPPORTED 1
1477 #define SUSPEND_MODE_DISK 1
1478 #define SUSPEND_MODE_RAM 2
1479 #define SUSPEND_MODE_HYBRID 3
1481 static bool pmutils_supports_mode(int suspend_mode, Error **errp)
1483 Error *local_err = NULL;
1484 const char *pmutils_arg;
1485 const char *pmutils_bin = "pm-is-supported";
1491 switch (suspend_mode) {
1493 case SUSPEND_MODE_DISK:
1494 pmutils_arg = "--hibernate";
1496 case SUSPEND_MODE_RAM:
1497 pmutils_arg = "--suspend";
1499 case SUSPEND_MODE_HYBRID:
1500 pmutils_arg = "--suspend-hybrid";
1506 pmutils_path = g_find_program_in_path(pmutils_bin);
1507 if (!pmutils_path) {
1514 execle(pmutils_path, pmutils_bin, pmutils_arg, NULL, environ);
1516 * If we get here execle() has failed.
1518 _exit(SUSPEND_NOT_SUPPORTED);
1519 } else if (pid < 0) {
1520 error_setg_errno(errp, errno, "failed to create child process");
1524 ga_wait_child(pid, &status, &local_err);
1526 error_propagate(errp, local_err);
1530 switch (WEXITSTATUS(status)) {
1531 case SUSPEND_SUPPORTED:
1534 case SUSPEND_NOT_SUPPORTED:
1538 "the helper program '%s' returned an unexpected exit status"
1539 " code (%d)", pmutils_path, WEXITSTATUS(status));
1544 g_free(pmutils_path);
1548 static bool linux_sys_state_supports_mode(int suspend_mode, Error **errp)
1550 const char *sysfile_str;
1551 char buf[32]; /* hopefully big enough */
1555 switch (suspend_mode) {
1557 case SUSPEND_MODE_DISK:
1558 sysfile_str = "disk";
1560 case SUSPEND_MODE_RAM:
1561 sysfile_str = "mem";
1567 fd = open(LINUX_SYS_STATE_FILE, O_RDONLY);
1572 ret = read(fd, buf, sizeof(buf) - 1);
1578 if (strstr(buf, sysfile_str)) {
1584 static void bios_supports_mode(int suspend_mode, Error **errp)
1586 Error *local_err = NULL;
1589 ret = pmutils_supports_mode(suspend_mode, &local_err);
1594 error_propagate(errp, local_err);
1597 ret = linux_sys_state_supports_mode(suspend_mode, errp);
1600 "the requested suspend mode is not supported by the guest");
1605 static void guest_suspend(int suspend_mode, Error **errp)
1607 Error *local_err = NULL;
1608 const char *pmutils_bin, *sysfile_str;
1613 bios_supports_mode(suspend_mode, &local_err);
1615 error_propagate(errp, local_err);
1619 switch (suspend_mode) {
1621 case SUSPEND_MODE_DISK:
1622 pmutils_bin = "pm-hibernate";
1623 sysfile_str = "disk";
1625 case SUSPEND_MODE_RAM:
1626 pmutils_bin = "pm-suspend";
1627 sysfile_str = "mem";
1629 case SUSPEND_MODE_HYBRID:
1630 pmutils_bin = "pm-suspend-hybrid";
1634 error_setg(errp, "unknown guest suspend mode");
1638 pmutils_path = g_find_program_in_path(pmutils_bin);
1646 reopen_fd_to_null(0);
1647 reopen_fd_to_null(1);
1648 reopen_fd_to_null(2);
1651 execle(pmutils_path, pmutils_bin, NULL, environ);
1655 * If we get here either pm-utils is not installed or execle() has
1656 * failed. Let's try the manual method if the caller wants it.
1660 _exit(EXIT_FAILURE);
1663 fd = open(LINUX_SYS_STATE_FILE, O_WRONLY);
1665 _exit(EXIT_FAILURE);
1668 if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) {
1669 _exit(EXIT_FAILURE);
1672 _exit(EXIT_SUCCESS);
1673 } else if (pid < 0) {
1674 error_setg_errno(errp, errno, "failed to create child process");
1678 ga_wait_child(pid, &status, &local_err);
1680 error_propagate(errp, local_err);
1684 if (!WIFEXITED(status)) {
1685 error_setg(errp, "child process has terminated abnormally");
1689 if (WEXITSTATUS(status)) {
1690 error_setg(errp, "child process has failed to suspend");
1695 g_free(pmutils_path);
1698 void qmp_guest_suspend_disk(Error **errp)
1700 guest_suspend(SUSPEND_MODE_DISK, errp);
1703 void qmp_guest_suspend_ram(Error **errp)
1705 guest_suspend(SUSPEND_MODE_RAM, errp);
1708 void qmp_guest_suspend_hybrid(Error **errp)
1710 guest_suspend(SUSPEND_MODE_HYBRID, errp);
1713 static GuestNetworkInterfaceList *
1714 guest_find_interface(GuestNetworkInterfaceList *head,
1717 for (; head; head = head->next) {
1718 if (strcmp(head->value->name, name) == 0) {
1726 static int guest_get_network_stats(const char *name,
1727 GuestNetworkInterfaceStat *stats)
1730 char const *devinfo = "/proc/net/dev";
1732 char *line = NULL, *colon;
1734 fp = fopen(devinfo, "r");
1738 name_len = strlen(name);
1739 while (getline(&line, &n, fp) != -1) {
1742 long long rx_packets;
1744 long long rx_dropped;
1746 long long tx_packets;
1748 long long tx_dropped;
1750 trim_line = g_strchug(line);
1751 if (trim_line[0] == '\0') {
1754 colon = strchr(trim_line, ':');
1758 if (colon - name_len == trim_line &&
1759 strncmp(trim_line, name, name_len) == 0) {
1760 if (sscanf(colon + 1,
1761 "%lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld",
1762 &rx_bytes, &rx_packets, &rx_errs, &rx_dropped,
1763 &dummy, &dummy, &dummy, &dummy,
1764 &tx_bytes, &tx_packets, &tx_errs, &tx_dropped,
1765 &dummy, &dummy, &dummy, &dummy) != 16) {
1768 stats->rx_bytes = rx_bytes;
1769 stats->rx_packets = rx_packets;
1770 stats->rx_errs = rx_errs;
1771 stats->rx_dropped = rx_dropped;
1772 stats->tx_bytes = tx_bytes;
1773 stats->tx_packets = tx_packets;
1774 stats->tx_errs = tx_errs;
1775 stats->tx_dropped = tx_dropped;
1783 g_debug("/proc/net/dev: Interface '%s' not found", name);
1788 * Build information about guest interfaces
1790 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
1792 GuestNetworkInterfaceList *head = NULL, *cur_item = NULL;
1793 struct ifaddrs *ifap, *ifa;
1795 if (getifaddrs(&ifap) < 0) {
1796 error_setg_errno(errp, errno, "getifaddrs failed");
1800 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1801 GuestNetworkInterfaceList *info;
1802 GuestIpAddressList **address_list = NULL, *address_item = NULL;
1803 GuestNetworkInterfaceStat *interface_stat = NULL;
1804 char addr4[INET_ADDRSTRLEN];
1805 char addr6[INET6_ADDRSTRLEN];
1808 unsigned char *mac_addr;
1811 g_debug("Processing %s interface", ifa->ifa_name);
1813 info = guest_find_interface(head, ifa->ifa_name);
1816 info = g_malloc0(sizeof(*info));
1817 info->value = g_malloc0(sizeof(*info->value));
1818 info->value->name = g_strdup(ifa->ifa_name);
1821 head = cur_item = info;
1823 cur_item->next = info;
1828 if (!info->value->has_hardware_address &&
1829 ifa->ifa_flags & SIOCGIFHWADDR) {
1830 /* we haven't obtained HW address yet */
1831 sock = socket(PF_INET, SOCK_STREAM, 0);
1833 error_setg_errno(errp, errno, "failed to create socket");
1837 memset(&ifr, 0, sizeof(ifr));
1838 pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->value->name);
1839 if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) {
1840 error_setg_errno(errp, errno,
1841 "failed to get MAC address of %s",
1848 mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data;
1850 info->value->hardware_address =
1851 g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x",
1852 (int) mac_addr[0], (int) mac_addr[1],
1853 (int) mac_addr[2], (int) mac_addr[3],
1854 (int) mac_addr[4], (int) mac_addr[5]);
1856 info->value->has_hardware_address = true;
1859 if (ifa->ifa_addr &&
1860 ifa->ifa_addr->sa_family == AF_INET) {
1861 /* interface with IPv4 address */
1862 p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
1863 if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) {
1864 error_setg_errno(errp, errno, "inet_ntop failed");
1868 address_item = g_malloc0(sizeof(*address_item));
1869 address_item->value = g_malloc0(sizeof(*address_item->value));
1870 address_item->value->ip_address = g_strdup(addr4);
1871 address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4;
1873 if (ifa->ifa_netmask) {
1874 /* Count the number of set bits in netmask.
1875 * This is safe as '1' and '0' cannot be shuffled in netmask. */
1876 p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr;
1877 address_item->value->prefix = ctpop32(((uint32_t *) p)[0]);
1879 } else if (ifa->ifa_addr &&
1880 ifa->ifa_addr->sa_family == AF_INET6) {
1881 /* interface with IPv6 address */
1882 p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
1883 if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) {
1884 error_setg_errno(errp, errno, "inet_ntop failed");
1888 address_item = g_malloc0(sizeof(*address_item));
1889 address_item->value = g_malloc0(sizeof(*address_item->value));
1890 address_item->value->ip_address = g_strdup(addr6);
1891 address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6;
1893 if (ifa->ifa_netmask) {
1894 /* Count the number of set bits in netmask.
1895 * This is safe as '1' and '0' cannot be shuffled in netmask. */
1896 p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr;
1897 address_item->value->prefix =
1898 ctpop32(((uint32_t *) p)[0]) +
1899 ctpop32(((uint32_t *) p)[1]) +
1900 ctpop32(((uint32_t *) p)[2]) +
1901 ctpop32(((uint32_t *) p)[3]);
1905 if (!address_item) {
1909 address_list = &info->value->ip_addresses;
1911 while (*address_list && (*address_list)->next) {
1912 address_list = &(*address_list)->next;
1915 if (!*address_list) {
1916 *address_list = address_item;
1918 (*address_list)->next = address_item;
1921 info->value->has_ip_addresses = true;
1923 if (!info->value->has_statistics) {
1924 interface_stat = g_malloc0(sizeof(*interface_stat));
1925 if (guest_get_network_stats(info->value->name,
1926 interface_stat) == -1) {
1927 info->value->has_statistics = false;
1928 g_free(interface_stat);
1930 info->value->statistics = interface_stat;
1931 info->value->has_statistics = true;
1941 qapi_free_GuestNetworkInterfaceList(head);
1945 #define SYSCONF_EXACT(name, errp) sysconf_exact((name), #name, (errp))
1947 static long sysconf_exact(int name, const char *name_str, Error **errp)
1952 ret = sysconf(name);
1955 error_setg(errp, "sysconf(%s): value indefinite", name_str);
1957 error_setg_errno(errp, errno, "sysconf(%s)", name_str);
1963 /* Transfer online/offline status between @vcpu and the guest system.
1965 * On input either @errp or *@errp must be NULL.
1967 * In system-to-@vcpu direction, the following @vcpu fields are accessed:
1968 * - R: vcpu->logical_id
1970 * - W: vcpu->can_offline
1972 * In @vcpu-to-system direction, the following @vcpu fields are accessed:
1973 * - R: vcpu->logical_id
1976 * Written members remain unmodified on error.
1978 static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu,
1984 dirpath = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/",
1986 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
1988 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
1990 static const char fn[] = "online";
1994 fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR);
1996 if (errno != ENOENT) {
1997 error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn);
1998 } else if (sys2vcpu) {
1999 vcpu->online = true;
2000 vcpu->can_offline = false;
2001 } else if (!vcpu->online) {
2002 error_setg(errp, "logical processor #%" PRId64 " can't be "
2003 "offlined", vcpu->logical_id);
2004 } /* otherwise pretend successful re-onlining */
2006 unsigned char status;
2008 res = pread(fd, &status, 1, 0);
2010 error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn);
2011 } else if (res == 0) {
2012 error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath,
2014 } else if (sys2vcpu) {
2015 vcpu->online = (status != '0');
2016 vcpu->can_offline = true;
2017 } else if (vcpu->online != (status != '0')) {
2018 status = '0' + vcpu->online;
2019 if (pwrite(fd, &status, 1, 0) == -1) {
2020 error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath,
2023 } /* otherwise pretend successful re-(on|off)-lining */
2036 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
2039 GuestLogicalProcessorList *head, **link;
2041 Error *local_err = NULL;
2046 sc_max = SYSCONF_EXACT(_SC_NPROCESSORS_CONF, &local_err);
2048 while (local_err == NULL && current < sc_max) {
2049 GuestLogicalProcessor *vcpu;
2050 GuestLogicalProcessorList *entry;
2052 vcpu = g_malloc0(sizeof *vcpu);
2053 vcpu->logical_id = current++;
2054 vcpu->has_can_offline = true; /* lolspeak ftw */
2055 transfer_vcpu(vcpu, true, &local_err);
2057 entry = g_malloc0(sizeof *entry);
2058 entry->value = vcpu;
2061 link = &entry->next;
2064 if (local_err == NULL) {
2065 /* there's no guest with zero VCPUs */
2066 g_assert(head != NULL);
2070 qapi_free_GuestLogicalProcessorList(head);
2071 error_propagate(errp, local_err);
2075 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
2078 Error *local_err = NULL;
2081 while (vcpus != NULL) {
2082 transfer_vcpu(vcpus->value, false, &local_err);
2083 if (local_err != NULL) {
2087 vcpus = vcpus->next;
2090 if (local_err != NULL) {
2091 if (processed == 0) {
2092 error_propagate(errp, local_err);
2094 error_free(local_err);
2101 void qmp_guest_set_user_password(const char *username,
2102 const char *password,
2106 Error *local_err = NULL;
2107 char *passwd_path = NULL;
2110 int datafd[2] = { -1, -1 };
2111 char *rawpasswddata = NULL;
2112 size_t rawpasswdlen;
2113 char *chpasswddata = NULL;
2116 rawpasswddata = (char *)qbase64_decode(password, -1, &rawpasswdlen, errp);
2117 if (!rawpasswddata) {
2120 rawpasswddata = g_renew(char, rawpasswddata, rawpasswdlen + 1);
2121 rawpasswddata[rawpasswdlen] = '\0';
2123 if (strchr(rawpasswddata, '\n')) {
2124 error_setg(errp, "forbidden characters in raw password");
2128 if (strchr(username, '\n') ||
2129 strchr(username, ':')) {
2130 error_setg(errp, "forbidden characters in username");
2134 chpasswddata = g_strdup_printf("%s:%s\n", username, rawpasswddata);
2135 chpasswdlen = strlen(chpasswddata);
2137 passwd_path = g_find_program_in_path("chpasswd");
2140 error_setg(errp, "cannot find 'passwd' program in PATH");
2144 if (pipe(datafd) < 0) {
2145 error_setg(errp, "cannot create pipe FDs");
2155 reopen_fd_to_null(1);
2156 reopen_fd_to_null(2);
2159 execle(passwd_path, "chpasswd", "-e", NULL, environ);
2161 execle(passwd_path, "chpasswd", NULL, environ);
2163 _exit(EXIT_FAILURE);
2164 } else if (pid < 0) {
2165 error_setg_errno(errp, errno, "failed to create child process");
2171 if (qemu_write_full(datafd[1], chpasswddata, chpasswdlen) != chpasswdlen) {
2172 error_setg_errno(errp, errno, "cannot write new account password");
2178 ga_wait_child(pid, &status, &local_err);
2180 error_propagate(errp, local_err);
2184 if (!WIFEXITED(status)) {
2185 error_setg(errp, "child process has terminated abnormally");
2189 if (WEXITSTATUS(status)) {
2190 error_setg(errp, "child process has failed to set user password");
2195 g_free(chpasswddata);
2196 g_free(rawpasswddata);
2197 g_free(passwd_path);
2198 if (datafd[0] != -1) {
2201 if (datafd[1] != -1) {
2206 static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf,
2207 int size, Error **errp)
2213 fd = openat(dirfd, pathname, O_RDONLY);
2215 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname);
2219 res = pread(fd, buf, size, 0);
2221 error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname);
2222 } else if (res == 0) {
2223 error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname);
2228 static void ga_write_sysfs_file(int dirfd, const char *pathname,
2229 const char *buf, int size, Error **errp)
2234 fd = openat(dirfd, pathname, O_WRONLY);
2236 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname);
2240 if (pwrite(fd, buf, size, 0) == -1) {
2241 error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname);
2247 /* Transfer online/offline status between @mem_blk and the guest system.
2249 * On input either @errp or *@errp must be NULL.
2251 * In system-to-@mem_blk direction, the following @mem_blk fields are accessed:
2252 * - R: mem_blk->phys_index
2253 * - W: mem_blk->online
2254 * - W: mem_blk->can_offline
2256 * In @mem_blk-to-system direction, the following @mem_blk fields are accessed:
2257 * - R: mem_blk->phys_index
2258 * - R: mem_blk->online
2259 *- R: mem_blk->can_offline
2260 * Written members remain unmodified on error.
2262 static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk,
2263 GuestMemoryBlockResponse *result,
2269 Error *local_err = NULL;
2275 error_setg(errp, "Internal error, 'result' should not be NULL");
2279 dp = opendir("/sys/devices/system/memory/");
2280 /* if there is no 'memory' directory in sysfs,
2281 * we think this VM does not support online/offline memory block,
2282 * any other solution?
2285 if (errno == ENOENT) {
2287 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED;
2294 dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/",
2295 mem_blk->phys_index);
2296 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2299 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2301 if (errno == ENOENT) {
2302 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND;
2305 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2313 status = g_malloc0(10);
2314 ga_read_sysfs_file(dirfd, "state", status, 10, &local_err);
2316 /* treat with sysfs file that not exist in old kernel */
2317 if (errno == ENOENT) {
2318 error_free(local_err);
2320 mem_blk->online = true;
2321 mem_blk->can_offline = false;
2322 } else if (!mem_blk->online) {
2324 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED;
2328 error_propagate(errp, local_err);
2331 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2338 char removable = '0';
2340 mem_blk->online = (strncmp(status, "online", 6) == 0);
2342 ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err);
2344 /* if no 'removable' file, it doesn't support offline mem blk */
2345 if (errno == ENOENT) {
2346 error_free(local_err);
2347 mem_blk->can_offline = false;
2349 error_propagate(errp, local_err);
2352 mem_blk->can_offline = (removable != '0');
2355 if (mem_blk->online != (strncmp(status, "online", 6) == 0)) {
2356 const char *new_state = mem_blk->online ? "online" : "offline";
2358 ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state),
2361 error_free(local_err);
2363 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
2367 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS;
2368 result->has_error_code = false;
2369 } /* otherwise pretend successful re-(on|off)-lining */
2380 result->has_error_code = true;
2381 result->error_code = errno;
2385 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp)
2387 GuestMemoryBlockList *head, **link;
2388 Error *local_err = NULL;
2395 dp = opendir("/sys/devices/system/memory/");
2397 /* it's ok if this happens to be a system that doesn't expose
2398 * memory blocks via sysfs, but otherwise we should report
2401 if (errno != ENOENT) {
2402 error_setg_errno(errp, errno, "Can't open directory"
2403 "\"/sys/devices/system/memory/\"");
2408 /* Note: the phys_index of memory block may be discontinuous,
2409 * this is because a memblk is the unit of the Sparse Memory design, which
2410 * allows discontinuous memory ranges (ex. NUMA), so here we should
2411 * traverse the memory block directory.
2413 while ((de = readdir(dp)) != NULL) {
2414 GuestMemoryBlock *mem_blk;
2415 GuestMemoryBlockList *entry;
2417 if ((strncmp(de->d_name, "memory", 6) != 0) ||
2418 !(de->d_type & DT_DIR)) {
2422 mem_blk = g_malloc0(sizeof *mem_blk);
2423 /* The d_name is "memoryXXX", phys_index is block id, same as XXX */
2424 mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10);
2425 mem_blk->has_can_offline = true; /* lolspeak ftw */
2426 transfer_memory_block(mem_blk, true, NULL, &local_err);
2428 entry = g_malloc0(sizeof *entry);
2429 entry->value = mem_blk;
2432 link = &entry->next;
2436 if (local_err == NULL) {
2437 /* there's no guest with zero memory blocks */
2439 error_setg(errp, "guest reported zero memory blocks!");
2444 qapi_free_GuestMemoryBlockList(head);
2445 error_propagate(errp, local_err);
2449 GuestMemoryBlockResponseList *
2450 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp)
2452 GuestMemoryBlockResponseList *head, **link;
2453 Error *local_err = NULL;
2458 while (mem_blks != NULL) {
2459 GuestMemoryBlockResponse *result;
2460 GuestMemoryBlockResponseList *entry;
2461 GuestMemoryBlock *current_mem_blk = mem_blks->value;
2463 result = g_malloc0(sizeof(*result));
2464 result->phys_index = current_mem_blk->phys_index;
2465 transfer_memory_block(current_mem_blk, false, result, &local_err);
2466 if (local_err) { /* should never happen */
2469 entry = g_malloc0(sizeof *entry);
2470 entry->value = result;
2473 link = &entry->next;
2474 mem_blks = mem_blks->next;
2479 qapi_free_GuestMemoryBlockResponseList(head);
2480 error_propagate(errp, local_err);
2484 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp)
2486 Error *local_err = NULL;
2490 GuestMemoryBlockInfo *info;
2492 dirpath = g_strdup_printf("/sys/devices/system/memory/");
2493 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
2495 error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
2501 buf = g_malloc0(20);
2502 ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err);
2506 error_propagate(errp, local_err);
2510 info = g_new0(GuestMemoryBlockInfo, 1);
2511 info->size = strtol(buf, NULL, 16); /* the unit is bytes */
2518 #else /* defined(__linux__) */
2520 void qmp_guest_suspend_disk(Error **errp)
2522 error_setg(errp, QERR_UNSUPPORTED);
2525 void qmp_guest_suspend_ram(Error **errp)
2527 error_setg(errp, QERR_UNSUPPORTED);
2530 void qmp_guest_suspend_hybrid(Error **errp)
2532 error_setg(errp, QERR_UNSUPPORTED);
2535 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
2537 error_setg(errp, QERR_UNSUPPORTED);
2541 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
2543 error_setg(errp, QERR_UNSUPPORTED);
2547 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
2549 error_setg(errp, QERR_UNSUPPORTED);
2553 void qmp_guest_set_user_password(const char *username,
2554 const char *password,
2558 error_setg(errp, QERR_UNSUPPORTED);
2561 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp)
2563 error_setg(errp, QERR_UNSUPPORTED);
2567 GuestMemoryBlockResponseList *
2568 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp)
2570 error_setg(errp, QERR_UNSUPPORTED);
2574 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp)
2576 error_setg(errp, QERR_UNSUPPORTED);
2582 #if !defined(CONFIG_FSFREEZE)
2584 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
2586 error_setg(errp, QERR_UNSUPPORTED);
2590 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
2592 error_setg(errp, QERR_UNSUPPORTED);
2597 int64_t qmp_guest_fsfreeze_freeze(Error **errp)
2599 error_setg(errp, QERR_UNSUPPORTED);
2604 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
2605 strList *mountpoints,
2608 error_setg(errp, QERR_UNSUPPORTED);
2613 int64_t qmp_guest_fsfreeze_thaw(Error **errp)
2615 error_setg(errp, QERR_UNSUPPORTED);
2619 #endif /* CONFIG_FSFREEZE */
2621 #if !defined(CONFIG_FSTRIM)
2622 GuestFilesystemTrimResponse *
2623 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
2625 error_setg(errp, QERR_UNSUPPORTED);
2630 /* add unsupported commands to the blacklist */
2631 GList *ga_command_blacklist_init(GList *blacklist)
2633 #if !defined(__linux__)
2635 const char *list[] = {
2636 "guest-suspend-disk", "guest-suspend-ram",
2637 "guest-suspend-hybrid", "guest-network-get-interfaces",
2638 "guest-get-vcpus", "guest-set-vcpus",
2639 "guest-get-memory-blocks", "guest-set-memory-blocks",
2640 "guest-get-memory-block-size", NULL};
2641 char **p = (char **)list;
2644 blacklist = g_list_append(blacklist, g_strdup(*p++));
2649 #if !defined(CONFIG_FSFREEZE)
2651 const char *list[] = {
2652 "guest-get-fsinfo", "guest-fsfreeze-status",
2653 "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list",
2654 "guest-fsfreeze-thaw", "guest-get-fsinfo", NULL};
2655 char **p = (char **)list;
2658 blacklist = g_list_append(blacklist, g_strdup(*p++));
2663 #if !defined(CONFIG_FSTRIM)
2664 blacklist = g_list_append(blacklist, g_strdup("guest-fstrim"));
2670 /* register init/cleanup routines for stateful command groups */
2671 void ga_command_state_init(GAState *s, GACommandState *cs)
2673 #if defined(CONFIG_FSFREEZE)
2674 ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup);
2680 #define QGA_MICRO_SECOND_TO_SECOND 1000000
2682 static double ga_get_login_time(struct utmpx *user_info)
2684 double seconds = (double)user_info->ut_tv.tv_sec;
2685 double useconds = (double)user_info->ut_tv.tv_usec;
2686 useconds /= QGA_MICRO_SECOND_TO_SECOND;
2687 return seconds + useconds;
2690 GuestUserList *qmp_guest_get_users(Error **err)
2692 GHashTable *cache = NULL;
2693 GuestUserList *head = NULL, *cur_item = NULL;
2694 struct utmpx *user_info = NULL;
2695 gpointer value = NULL;
2696 GuestUser *user = NULL;
2697 GuestUserList *item = NULL;
2698 double login_time = 0;
2700 cache = g_hash_table_new(g_str_hash, g_str_equal);
2704 user_info = getutxent();
2705 if (user_info == NULL) {
2707 } else if (user_info->ut_type != USER_PROCESS) {
2709 } else if (g_hash_table_contains(cache, user_info->ut_user)) {
2710 value = g_hash_table_lookup(cache, user_info->ut_user);
2711 user = (GuestUser *)value;
2712 login_time = ga_get_login_time(user_info);
2713 /* We're ensuring the earliest login time to be sent */
2714 if (login_time < user->login_time) {
2715 user->login_time = login_time;
2720 item = g_new0(GuestUserList, 1);
2721 item->value = g_new0(GuestUser, 1);
2722 item->value->user = g_strdup(user_info->ut_user);
2723 item->value->login_time = ga_get_login_time(user_info);
2725 g_hash_table_insert(cache, item->value->user, item->value);
2728 head = cur_item = item;
2730 cur_item->next = item;
2735 g_hash_table_destroy(cache);
2741 GuestUserList *qmp_guest_get_users(Error **errp)
2743 error_setg(errp, QERR_UNSUPPORTED);
2749 /* Replace escaped special characters with theire real values. The replacement
2750 * is done in place -- returned value is in the original string.
2752 static void ga_osrelease_replace_special(gchar *value)
2754 gchar *p, *p2, quote;
2756 /* Trim the string at first space or semicolon if it is not enclosed in
2757 * single or double quotes. */
2758 if ((value[0] != '"') || (value[0] == '\'')) {
2759 p = strchr(value, ' ');
2763 p = strchr(value, ';');
2784 /* Keep literal backslash followed by whatever is there */
2788 } else if (*p == quote) {
2796 static GKeyFile *ga_parse_osrelease(const char *fname)
2798 gchar *content = NULL;
2799 gchar *content2 = NULL;
2801 GKeyFile *keys = g_key_file_new();
2802 const char *group = "[os-release]\n";
2804 if (!g_file_get_contents(fname, &content, NULL, &err)) {
2805 slog("failed to read '%s', error: %s", fname, err->message);
2809 if (!g_utf8_validate(content, -1, NULL)) {
2810 slog("file is not utf-8 encoded: %s", fname);
2813 content2 = g_strdup_printf("%s%s", group, content);
2815 if (!g_key_file_load_from_data(keys, content2, -1, G_KEY_FILE_NONE,
2817 slog("failed to parse file '%s', error: %s", fname, err->message);
2829 g_key_file_free(keys);
2833 GuestOSInfo *qmp_guest_get_osinfo(Error **errp)
2835 GuestOSInfo *info = NULL;
2836 struct utsname kinfo;
2837 GKeyFile *osrelease = NULL;
2838 const char *qga_os_release = g_getenv("QGA_OS_RELEASE");
2840 info = g_new0(GuestOSInfo, 1);
2842 if (uname(&kinfo) != 0) {
2843 error_setg_errno(errp, errno, "uname failed");
2845 info->has_kernel_version = true;
2846 info->kernel_version = g_strdup(kinfo.version);
2847 info->has_kernel_release = true;
2848 info->kernel_release = g_strdup(kinfo.release);
2849 info->has_machine = true;
2850 info->machine = g_strdup(kinfo.machine);
2853 if (qga_os_release != NULL) {
2854 osrelease = ga_parse_osrelease(qga_os_release);
2856 osrelease = ga_parse_osrelease("/etc/os-release");
2857 if (osrelease == NULL) {
2858 osrelease = ga_parse_osrelease("/usr/lib/os-release");
2862 if (osrelease != NULL) {
2865 #define GET_FIELD(field, osfield) do { \
2866 value = g_key_file_get_value(osrelease, "os-release", osfield, NULL); \
2867 if (value != NULL) { \
2868 ga_osrelease_replace_special(value); \
2869 info->has_ ## field = true; \
2870 info->field = value; \
2873 GET_FIELD(id, "ID");
2874 GET_FIELD(name, "NAME");
2875 GET_FIELD(pretty_name, "PRETTY_NAME");
2876 GET_FIELD(version, "VERSION");
2877 GET_FIELD(version_id, "VERSION_ID");
2878 GET_FIELD(variant, "VARIANT");
2879 GET_FIELD(variant_id, "VARIANT_ID");
2882 g_key_file_free(osrelease);