2 * QEMU Guest Agent POSIX-specific command implementations
4 * Copyright IBM Corp. 2011
7 * Michael Roth <mdroth@linux.vnet.ibm.com>
8 * Michal Privoznik <mprivozn@redhat.com>
10 * This work is licensed under the terms of the GNU GPL, version 2 or later.
11 * See the COPYING file in the top-level directory.
14 #include "qemu/osdep.h"
15 #include <sys/ioctl.h>
16 #include <sys/utsname.h>
19 #include "qemu-common.h"
20 #include "guest-agent-core.h"
21 #include "qga-qapi-commands.h"
22 #include "qapi/error.h"
23 #include "qapi/qmp/qerror.h"
24 #include "qemu/queue.h"
25 #include "qemu/host-utils.h"
26 #include "qemu/sockets.h"
27 #include "qemu/base64.h"
28 #include "qemu/cutils.h"
29 #include "commands-common.h"
35 #ifndef CONFIG_HAS_ENVIRON
37 #include <crt_externs.h>
38 #define environ (*_NSGetEnviron())
40 extern char **environ
;
44 #if defined(__linux__)
48 #include <arpa/inet.h>
49 #include <sys/socket.h>
51 #include <sys/statvfs.h>
58 #define CONFIG_FSFREEZE
65 static void ga_wait_child(pid_t pid
, int *status
, Error
**errp
)
72 rpid
= waitpid(pid
, status
, 0);
73 } while (rpid
== -1 && errno
== EINTR
);
76 error_setg_errno(errp
, errno
, "failed to wait for child (pid: %d)",
81 g_assert(rpid
== pid
);
84 void qmp_guest_shutdown(bool has_mode
, const char *mode
, Error
**errp
)
86 const char *shutdown_flag
;
87 Error
*local_err
= NULL
;
91 slog("guest-shutdown called, mode: %s", mode
);
92 if (!has_mode
|| strcmp(mode
, "powerdown") == 0) {
94 } else if (strcmp(mode
, "halt") == 0) {
96 } else if (strcmp(mode
, "reboot") == 0) {
100 "mode is invalid (valid values are: halt|powerdown|reboot");
106 /* child, start the shutdown */
108 reopen_fd_to_null(0);
109 reopen_fd_to_null(1);
110 reopen_fd_to_null(2);
112 execle("/sbin/shutdown", "shutdown", "-h", shutdown_flag
, "+0",
113 "hypervisor initiated shutdown", (char *)NULL
, environ
);
115 } else if (pid
< 0) {
116 error_setg_errno(errp
, errno
, "failed to create child process");
120 ga_wait_child(pid
, &status
, &local_err
);
122 error_propagate(errp
, local_err
);
126 if (!WIFEXITED(status
)) {
127 error_setg(errp
, "child process has terminated abnormally");
131 if (WEXITSTATUS(status
)) {
132 error_setg(errp
, "child process has failed to shutdown");
139 void qmp_guest_set_time(bool has_time
, int64_t time_ns
, Error
**errp
)
144 Error
*local_err
= NULL
;
146 static const char hwclock_path
[] = "/sbin/hwclock";
147 static int hwclock_available
= -1;
149 if (hwclock_available
< 0) {
150 hwclock_available
= (access(hwclock_path
, X_OK
) == 0);
153 if (!hwclock_available
) {
154 error_setg(errp
, QERR_UNSUPPORTED
);
158 /* If user has passed a time, validate and set it. */
162 /* year-2038 will overflow in case time_t is 32bit */
163 if (time_ns
/ 1000000000 != (time_t)(time_ns
/ 1000000000)) {
164 error_setg(errp
, "Time %" PRId64
" is too large", time_ns
);
168 tv
.tv_sec
= time_ns
/ 1000000000;
169 tv
.tv_usec
= (time_ns
% 1000000000) / 1000;
170 g_date_set_time_t(&date
, tv
.tv_sec
);
171 if (date
.year
< 1970 || date
.year
>= 2070) {
172 error_setg_errno(errp
, errno
, "Invalid time");
176 ret
= settimeofday(&tv
, NULL
);
178 error_setg_errno(errp
, errno
, "Failed to set time to guest");
183 /* Now, if user has passed a time to set and the system time is set, we
184 * just need to synchronize the hardware clock. However, if no time was
185 * passed, user is requesting the opposite: set the system time from the
186 * hardware clock (RTC). */
190 reopen_fd_to_null(0);
191 reopen_fd_to_null(1);
192 reopen_fd_to_null(2);
194 /* Use '/sbin/hwclock -w' to set RTC from the system time,
195 * or '/sbin/hwclock -s' to set the system time from RTC. */
196 execle(hwclock_path
, "hwclock", has_time
? "-w" : "-s",
199 } else if (pid
< 0) {
200 error_setg_errno(errp
, errno
, "failed to create child process");
204 ga_wait_child(pid
, &status
, &local_err
);
206 error_propagate(errp
, local_err
);
210 if (!WIFEXITED(status
)) {
211 error_setg(errp
, "child process has terminated abnormally");
215 if (WEXITSTATUS(status
)) {
216 error_setg(errp
, "hwclock failed to set hardware clock to system time");
227 struct GuestFileHandle
{
231 QTAILQ_ENTRY(GuestFileHandle
) next
;
235 QTAILQ_HEAD(, GuestFileHandle
) filehandles
;
236 } guest_file_state
= {
237 .filehandles
= QTAILQ_HEAD_INITIALIZER(guest_file_state
.filehandles
),
240 static int64_t guest_file_handle_add(FILE *fh
, Error
**errp
)
242 GuestFileHandle
*gfh
;
245 handle
= ga_get_fd_handle(ga_state
, errp
);
250 gfh
= g_new0(GuestFileHandle
, 1);
253 QTAILQ_INSERT_TAIL(&guest_file_state
.filehandles
, gfh
, next
);
258 GuestFileHandle
*guest_file_handle_find(int64_t id
, Error
**errp
)
260 GuestFileHandle
*gfh
;
262 QTAILQ_FOREACH(gfh
, &guest_file_state
.filehandles
, next
)
269 error_setg(errp
, "handle '%" PRId64
"' has not been found", id
);
273 typedef const char * const ccpc
;
279 /* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */
280 static const struct {
283 } guest_file_open_modes
[] = {
284 { (ccpc
[]){ "r", NULL
}, O_RDONLY
},
285 { (ccpc
[]){ "rb", NULL
}, O_RDONLY
| O_BINARY
},
286 { (ccpc
[]){ "w", NULL
}, O_WRONLY
| O_CREAT
| O_TRUNC
},
287 { (ccpc
[]){ "wb", NULL
}, O_WRONLY
| O_CREAT
| O_TRUNC
| O_BINARY
},
288 { (ccpc
[]){ "a", NULL
}, O_WRONLY
| O_CREAT
| O_APPEND
},
289 { (ccpc
[]){ "ab", NULL
}, O_WRONLY
| O_CREAT
| O_APPEND
| O_BINARY
},
290 { (ccpc
[]){ "r+", NULL
}, O_RDWR
},
291 { (ccpc
[]){ "rb+", "r+b", NULL
}, O_RDWR
| O_BINARY
},
292 { (ccpc
[]){ "w+", NULL
}, O_RDWR
| O_CREAT
| O_TRUNC
},
293 { (ccpc
[]){ "wb+", "w+b", NULL
}, O_RDWR
| O_CREAT
| O_TRUNC
| O_BINARY
},
294 { (ccpc
[]){ "a+", NULL
}, O_RDWR
| O_CREAT
| O_APPEND
},
295 { (ccpc
[]){ "ab+", "a+b", NULL
}, O_RDWR
| O_CREAT
| O_APPEND
| O_BINARY
}
299 find_open_flag(const char *mode_str
, Error
**errp
)
303 for (mode
= 0; mode
< ARRAY_SIZE(guest_file_open_modes
); ++mode
) {
306 form
= guest_file_open_modes
[mode
].forms
;
307 while (*form
!= NULL
&& strcmp(*form
, mode_str
) != 0) {
315 if (mode
== ARRAY_SIZE(guest_file_open_modes
)) {
316 error_setg(errp
, "invalid file open mode '%s'", mode_str
);
319 return guest_file_open_modes
[mode
].oflag_base
| O_NOCTTY
| O_NONBLOCK
;
322 #define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \
323 S_IRGRP | S_IWGRP | \
327 safe_open_or_create(const char *path
, const char *mode
, Error
**errp
)
329 Error
*local_err
= NULL
;
332 oflag
= find_open_flag(mode
, &local_err
);
333 if (local_err
== NULL
) {
336 /* If the caller wants / allows creation of a new file, we implement it
337 * with a two step process: open() + (open() / fchmod()).
339 * First we insist on creating the file exclusively as a new file. If
340 * that succeeds, we're free to set any file-mode bits on it. (The
341 * motivation is that we want to set those file-mode bits independently
342 * of the current umask.)
344 * If the exclusive creation fails because the file already exists
345 * (EEXIST is not possible for any other reason), we just attempt to
346 * open the file, but in this case we won't be allowed to change the
347 * file-mode bits on the preexistent file.
349 * The pathname should never disappear between the two open()s in
350 * practice. If it happens, then someone very likely tried to race us.
351 * In this case just go ahead and report the ENOENT from the second
352 * open() to the caller.
354 * If the caller wants to open a preexistent file, then the first
355 * open() is decisive and its third argument is ignored, and the second
356 * open() and the fchmod() are never called.
358 fd
= open(path
, oflag
| ((oflag
& O_CREAT
) ? O_EXCL
: 0), 0);
359 if (fd
== -1 && errno
== EEXIST
) {
360 oflag
&= ~(unsigned)O_CREAT
;
361 fd
= open(path
, oflag
);
365 error_setg_errno(&local_err
, errno
, "failed to open file '%s' "
366 "(mode: '%s')", path
, mode
);
368 qemu_set_cloexec(fd
);
370 if ((oflag
& O_CREAT
) && fchmod(fd
, DEFAULT_NEW_FILE_MODE
) == -1) {
371 error_setg_errno(&local_err
, errno
, "failed to set permission "
372 "0%03o on new file '%s' (mode: '%s')",
373 (unsigned)DEFAULT_NEW_FILE_MODE
, path
, mode
);
377 f
= fdopen(fd
, mode
);
379 error_setg_errno(&local_err
, errno
, "failed to associate "
380 "stdio stream with file descriptor %d, "
381 "file '%s' (mode: '%s')", fd
, path
, mode
);
388 if (oflag
& O_CREAT
) {
394 error_propagate(errp
, local_err
);
398 int64_t qmp_guest_file_open(const char *path
, bool has_mode
, const char *mode
,
402 Error
*local_err
= NULL
;
408 slog("guest-file-open called, filepath: %s, mode: %s", path
, mode
);
409 fh
= safe_open_or_create(path
, mode
, &local_err
);
410 if (local_err
!= NULL
) {
411 error_propagate(errp
, local_err
);
415 /* set fd non-blocking to avoid common use cases (like reading from a
416 * named pipe) from hanging the agent
418 qemu_set_nonblock(fileno(fh
));
420 handle
= guest_file_handle_add(fh
, errp
);
426 slog("guest-file-open, handle: %" PRId64
, handle
);
430 void qmp_guest_file_close(int64_t handle
, Error
**errp
)
432 GuestFileHandle
*gfh
= guest_file_handle_find(handle
, errp
);
435 slog("guest-file-close called, handle: %" PRId64
, handle
);
440 ret
= fclose(gfh
->fh
);
442 error_setg_errno(errp
, errno
, "failed to close handle");
446 QTAILQ_REMOVE(&guest_file_state
.filehandles
, gfh
, next
);
450 GuestFileRead
*guest_file_read_unsafe(GuestFileHandle
*gfh
,
451 int64_t count
, Error
**errp
)
453 GuestFileRead
*read_data
= NULL
;
458 /* explicitly flush when switching from writing to reading */
459 if (gfh
->state
== RW_STATE_WRITING
) {
460 int ret
= fflush(fh
);
462 error_setg_errno(errp
, errno
, "failed to flush file");
465 gfh
->state
= RW_STATE_NEW
;
468 buf
= g_malloc0(count
+ 1);
469 read_count
= fread(buf
, 1, count
, fh
);
471 error_setg_errno(errp
, errno
, "failed to read file");
474 read_data
= g_new0(GuestFileRead
, 1);
475 read_data
->count
= read_count
;
476 read_data
->eof
= feof(fh
);
478 read_data
->buf_b64
= g_base64_encode(buf
, read_count
);
480 gfh
->state
= RW_STATE_READING
;
488 GuestFileWrite
*qmp_guest_file_write(int64_t handle
, const char *buf_b64
,
489 bool has_count
, int64_t count
,
492 GuestFileWrite
*write_data
= NULL
;
496 GuestFileHandle
*gfh
= guest_file_handle_find(handle
, errp
);
505 if (gfh
->state
== RW_STATE_READING
) {
506 int ret
= fseek(fh
, 0, SEEK_CUR
);
508 error_setg_errno(errp
, errno
, "failed to seek file");
511 gfh
->state
= RW_STATE_NEW
;
514 buf
= qbase64_decode(buf_b64
, -1, &buf_len
, errp
);
521 } else if (count
< 0 || count
> buf_len
) {
522 error_setg(errp
, "value '%" PRId64
"' is invalid for argument count",
528 write_count
= fwrite(buf
, 1, count
, fh
);
530 error_setg_errno(errp
, errno
, "failed to write to file");
531 slog("guest-file-write failed, handle: %" PRId64
, handle
);
533 write_data
= g_new0(GuestFileWrite
, 1);
534 write_data
->count
= write_count
;
535 write_data
->eof
= feof(fh
);
536 gfh
->state
= RW_STATE_WRITING
;
544 struct GuestFileSeek
*qmp_guest_file_seek(int64_t handle
, int64_t offset
,
545 GuestFileWhence
*whence_code
,
548 GuestFileHandle
*gfh
= guest_file_handle_find(handle
, errp
);
549 GuestFileSeek
*seek_data
= NULL
;
559 /* We stupidly exposed 'whence':'int' in our qapi */
560 whence
= ga_parse_whence(whence_code
, &err
);
562 error_propagate(errp
, err
);
567 ret
= fseek(fh
, offset
, whence
);
569 error_setg_errno(errp
, errno
, "failed to seek file");
570 if (errno
== ESPIPE
) {
571 /* file is non-seekable, stdio shouldn't be buffering anyways */
572 gfh
->state
= RW_STATE_NEW
;
575 seek_data
= g_new0(GuestFileSeek
, 1);
576 seek_data
->position
= ftell(fh
);
577 seek_data
->eof
= feof(fh
);
578 gfh
->state
= RW_STATE_NEW
;
585 void qmp_guest_file_flush(int64_t handle
, Error
**errp
)
587 GuestFileHandle
*gfh
= guest_file_handle_find(handle
, errp
);
598 error_setg_errno(errp
, errno
, "failed to flush file");
600 gfh
->state
= RW_STATE_NEW
;
604 /* linux-specific implementations. avoid this if at all possible. */
605 #if defined(__linux__)
607 #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM)
608 typedef struct FsMount
{
611 unsigned int devmajor
, devminor
;
612 QTAILQ_ENTRY(FsMount
) next
;
615 typedef QTAILQ_HEAD(FsMountList
, FsMount
) FsMountList
;
617 static void free_fs_mount_list(FsMountList
*mounts
)
619 FsMount
*mount
, *temp
;
625 QTAILQ_FOREACH_SAFE(mount
, mounts
, next
, temp
) {
626 QTAILQ_REMOVE(mounts
, mount
, next
);
627 g_free(mount
->dirname
);
628 g_free(mount
->devtype
);
633 static int dev_major_minor(const char *devpath
,
634 unsigned int *devmajor
, unsigned int *devminor
)
641 if (stat(devpath
, &st
) < 0) {
642 slog("failed to stat device file '%s': %s", devpath
, strerror(errno
));
645 if (S_ISDIR(st
.st_mode
)) {
646 /* It is bind mount */
649 if (S_ISBLK(st
.st_mode
)) {
650 *devmajor
= major(st
.st_rdev
);
651 *devminor
= minor(st
.st_rdev
);
658 * Walk the mount table and build a list of local file systems
660 static void build_fs_mount_list_from_mtab(FsMountList
*mounts
, Error
**errp
)
664 char const *mtab
= "/proc/self/mounts";
666 unsigned int devmajor
, devminor
;
668 fp
= setmntent(mtab
, "r");
670 error_setg(errp
, "failed to open mtab file: '%s'", mtab
);
674 while ((ment
= getmntent(fp
))) {
676 * An entry which device name doesn't start with a '/' is
677 * either a dummy file system or a network file system.
678 * Add special handling for smbfs and cifs as is done by
681 if ((ment
->mnt_fsname
[0] != '/') ||
682 (strcmp(ment
->mnt_type
, "smbfs") == 0) ||
683 (strcmp(ment
->mnt_type
, "cifs") == 0)) {
686 if (dev_major_minor(ment
->mnt_fsname
, &devmajor
, &devminor
) == -2) {
687 /* Skip bind mounts */
691 mount
= g_new0(FsMount
, 1);
692 mount
->dirname
= g_strdup(ment
->mnt_dir
);
693 mount
->devtype
= g_strdup(ment
->mnt_type
);
694 mount
->devmajor
= devmajor
;
695 mount
->devminor
= devminor
;
697 QTAILQ_INSERT_TAIL(mounts
, mount
, next
);
703 static void decode_mntname(char *name
, int len
)
706 for (i
= 0; i
<= len
; i
++) {
707 if (name
[i
] != '\\') {
709 } else if (name
[i
+ 1] == '\\') {
712 } else if (name
[i
+ 1] >= '0' && name
[i
+ 1] <= '3' &&
713 name
[i
+ 2] >= '0' && name
[i
+ 2] <= '7' &&
714 name
[i
+ 3] >= '0' && name
[i
+ 3] <= '7') {
715 name
[j
++] = (name
[i
+ 1] - '0') * 64 +
716 (name
[i
+ 2] - '0') * 8 +
725 static void build_fs_mount_list(FsMountList
*mounts
, Error
**errp
)
728 char const *mountinfo
= "/proc/self/mountinfo";
730 char *line
= NULL
, *dash
;
733 unsigned int devmajor
, devminor
;
734 int ret
, dir_s
, dir_e
, type_s
, type_e
, dev_s
, dev_e
;
736 fp
= fopen(mountinfo
, "r");
738 build_fs_mount_list_from_mtab(mounts
, errp
);
742 while (getline(&line
, &n
, fp
) != -1) {
743 ret
= sscanf(line
, "%*u %*u %u:%u %*s %n%*s%n%c",
744 &devmajor
, &devminor
, &dir_s
, &dir_e
, &check
);
748 dash
= strstr(line
+ dir_e
, " - ");
752 ret
= sscanf(dash
, " - %n%*s%n %n%*s%n%c",
753 &type_s
, &type_e
, &dev_s
, &dev_e
, &check
);
760 decode_mntname(line
+ dir_s
, dir_e
- dir_s
);
761 decode_mntname(dash
+ dev_s
, dev_e
- dev_s
);
763 /* btrfs reports major number = 0 */
764 if (strcmp("btrfs", dash
+ type_s
) != 0 ||
765 dev_major_minor(dash
+ dev_s
, &devmajor
, &devminor
) < 0) {
770 mount
= g_new0(FsMount
, 1);
771 mount
->dirname
= g_strdup(line
+ dir_s
);
772 mount
->devtype
= g_strdup(dash
+ type_s
);
773 mount
->devmajor
= devmajor
;
774 mount
->devminor
= devminor
;
776 QTAILQ_INSERT_TAIL(mounts
, mount
, next
);
784 #if defined(CONFIG_FSFREEZE)
786 static char *get_pci_driver(char const *syspath
, int pathlen
, Error
**errp
)
794 path
= g_strndup(syspath
, pathlen
);
795 dpath
= g_strdup_printf("%s/driver", path
);
796 len
= readlink(dpath
, buf
, sizeof(buf
) - 1);
799 driver
= g_path_get_basename(buf
);
806 static int compare_uint(const void *_a
, const void *_b
)
808 unsigned int a
= *(unsigned int *)_a
;
809 unsigned int b
= *(unsigned int *)_b
;
811 return a
< b
? -1 : a
> b
? 1 : 0;
814 /* Walk the specified sysfs and build a sorted list of host or ata numbers */
815 static int build_hosts(char const *syspath
, char const *host
, bool ata
,
816 unsigned int *hosts
, int hosts_max
, Error
**errp
)
820 struct dirent
*entry
;
823 path
= g_strndup(syspath
, host
- syspath
);
826 error_setg_errno(errp
, errno
, "opendir(\"%s\")", path
);
831 while (i
< hosts_max
) {
832 entry
= readdir(dir
);
836 if (ata
&& sscanf(entry
->d_name
, "ata%d", hosts
+ i
) == 1) {
838 } else if (!ata
&& sscanf(entry
->d_name
, "host%d", hosts
+ i
) == 1) {
843 qsort(hosts
, i
, sizeof(hosts
[0]), compare_uint
);
851 * Store disk device info for devices on the PCI bus.
852 * Returns true if information has been stored, or false for failure.
854 static bool build_guest_fsinfo_for_pci_dev(char const *syspath
,
855 GuestDiskAddress
*disk
,
858 unsigned int pci
[4], host
, hosts
[8], tgt
[3];
859 int i
, nhosts
= 0, pcilen
;
860 GuestPCIAddress
*pciaddr
= disk
->pci_controller
;
861 bool has_ata
= false, has_host
= false, has_tgt
= false;
862 char *p
, *q
, *driver
= NULL
;
865 p
= strstr(syspath
, "/devices/pci");
866 if (!p
|| sscanf(p
+ 12, "%*x:%*x/%x:%x:%x.%x%n",
867 pci
, pci
+ 1, pci
+ 2, pci
+ 3, &pcilen
) < 4) {
868 g_debug("only pci device is supported: sysfs path '%s'", syspath
);
874 driver
= get_pci_driver(syspath
, p
- syspath
, errp
);
875 if (driver
&& (g_str_equal(driver
, "ata_piix") ||
876 g_str_equal(driver
, "sym53c8xx") ||
877 g_str_equal(driver
, "virtio-pci") ||
878 g_str_equal(driver
, "ahci"))) {
883 if (sscanf(p
, "/%x:%x:%x.%x%n",
884 pci
, pci
+ 1, pci
+ 2, pci
+ 3, &pcilen
) == 4) {
889 g_debug("unsupported driver or sysfs path '%s'", syspath
);
893 p
= strstr(syspath
, "/target");
894 if (p
&& sscanf(p
+ 7, "%*u:%*u:%*u/%*u:%u:%u:%u",
895 tgt
, tgt
+ 1, tgt
+ 2) == 3) {
899 p
= strstr(syspath
, "/ata");
904 p
= strstr(syspath
, "/host");
907 if (p
&& sscanf(q
, "%u", &host
) == 1) {
909 nhosts
= build_hosts(syspath
, p
, has_ata
, hosts
,
910 ARRAY_SIZE(hosts
), errp
);
916 pciaddr
->domain
= pci
[0];
917 pciaddr
->bus
= pci
[1];
918 pciaddr
->slot
= pci
[2];
919 pciaddr
->function
= pci
[3];
921 if (strcmp(driver
, "ata_piix") == 0) {
922 /* a host per ide bus, target*:0:<unit>:0 */
923 if (!has_host
|| !has_tgt
) {
924 g_debug("invalid sysfs path '%s' (driver '%s')", syspath
, driver
);
927 for (i
= 0; i
< nhosts
; i
++) {
928 if (host
== hosts
[i
]) {
929 disk
->bus_type
= GUEST_DISK_BUS_TYPE_IDE
;
936 g_debug("no host for '%s' (driver '%s')", syspath
, driver
);
939 } else if (strcmp(driver
, "sym53c8xx") == 0) {
940 /* scsi(LSI Logic): target*:0:<unit>:0 */
942 g_debug("invalid sysfs path '%s' (driver '%s')", syspath
, driver
);
945 disk
->bus_type
= GUEST_DISK_BUS_TYPE_SCSI
;
947 } else if (strcmp(driver
, "virtio-pci") == 0) {
949 /* virtio-scsi: target*:0:0:<unit> */
950 disk
->bus_type
= GUEST_DISK_BUS_TYPE_SCSI
;
953 /* virtio-blk: 1 disk per 1 device */
954 disk
->bus_type
= GUEST_DISK_BUS_TYPE_VIRTIO
;
956 } else if (strcmp(driver
, "ahci") == 0) {
957 /* ahci: 1 host per 1 unit */
958 if (!has_host
|| !has_tgt
) {
959 g_debug("invalid sysfs path '%s' (driver '%s')", syspath
, driver
);
962 for (i
= 0; i
< nhosts
; i
++) {
963 if (host
== hosts
[i
]) {
965 disk
->bus_type
= GUEST_DISK_BUS_TYPE_SATA
;
970 g_debug("no host for '%s' (driver '%s')", syspath
, driver
);
974 g_debug("unknown driver '%s' (sysfs path '%s')", driver
, syspath
);
986 * Store disk device info for non-PCI virtio devices (for example s390x
987 * channel I/O devices). Returns true if information has been stored, or
990 static bool build_guest_fsinfo_for_nonpci_virtio(char const *syspath
,
991 GuestDiskAddress
*disk
,
997 if (!strstr(syspath
, "/virtio") || !strstr(syspath
, "/block")) {
998 g_debug("Unsupported virtio device '%s'", syspath
);
1002 p
= strstr(syspath
, "/target");
1003 if (p
&& sscanf(p
+ 7, "%*u:%*u:%*u/%*u:%u:%u:%u",
1004 &tgt
[0], &tgt
[1], &tgt
[2]) == 3) {
1005 /* virtio-scsi: target*:0:<target>:<unit> */
1006 disk
->bus_type
= GUEST_DISK_BUS_TYPE_SCSI
;
1008 disk
->target
= tgt
[1];
1009 disk
->unit
= tgt
[2];
1011 /* virtio-blk: 1 disk per 1 device */
1012 disk
->bus_type
= GUEST_DISK_BUS_TYPE_VIRTIO
;
1019 * Store disk device info for CCW devices (s390x channel I/O devices).
1020 * Returns true if information has been stored, or false for failure.
1022 static bool build_guest_fsinfo_for_ccw_dev(char const *syspath
,
1023 GuestDiskAddress
*disk
,
1026 unsigned int cssid
, ssid
, subchno
, devno
;
1029 p
= strstr(syspath
, "/devices/css");
1030 if (!p
|| sscanf(p
+ 12, "%*x/%x.%x.%x/%*x.%*x.%x/",
1031 &cssid
, &ssid
, &subchno
, &devno
) < 4) {
1032 g_debug("could not parse ccw device sysfs path: %s", syspath
);
1036 disk
->has_ccw_address
= true;
1037 disk
->ccw_address
= g_new0(GuestCCWAddress
, 1);
1038 disk
->ccw_address
->cssid
= cssid
;
1039 disk
->ccw_address
->ssid
= ssid
;
1040 disk
->ccw_address
->subchno
= subchno
;
1041 disk
->ccw_address
->devno
= devno
;
1043 if (strstr(p
, "/virtio")) {
1044 build_guest_fsinfo_for_nonpci_virtio(syspath
, disk
, errp
);
1050 /* Store disk device info specified by @sysfs into @fs */
1051 static void build_guest_fsinfo_for_real_device(char const *syspath
,
1052 GuestFilesystemInfo
*fs
,
1055 GuestDiskAddress
*disk
;
1056 GuestPCIAddress
*pciaddr
;
1058 #ifdef CONFIG_LIBUDEV
1059 struct udev
*udev
= NULL
;
1060 struct udev_device
*udevice
= NULL
;
1063 pciaddr
= g_new0(GuestPCIAddress
, 1);
1064 pciaddr
->domain
= -1; /* -1 means field is invalid */
1067 pciaddr
->function
= -1;
1069 disk
= g_new0(GuestDiskAddress
, 1);
1070 disk
->pci_controller
= pciaddr
;
1071 disk
->bus_type
= GUEST_DISK_BUS_TYPE_UNKNOWN
;
1073 #ifdef CONFIG_LIBUDEV
1075 udevice
= udev_device_new_from_syspath(udev
, syspath
);
1076 if (udev
== NULL
|| udevice
== NULL
) {
1077 g_debug("failed to query udev");
1079 const char *devnode
, *serial
;
1080 devnode
= udev_device_get_devnode(udevice
);
1081 if (devnode
!= NULL
) {
1082 disk
->dev
= g_strdup(devnode
);
1083 disk
->has_dev
= true;
1085 serial
= udev_device_get_property_value(udevice
, "ID_SERIAL");
1086 if (serial
!= NULL
&& *serial
!= 0) {
1087 disk
->serial
= g_strdup(serial
);
1088 disk
->has_serial
= true;
1093 udev_device_unref(udevice
);
1096 if (strstr(syspath
, "/devices/pci")) {
1097 has_hwinf
= build_guest_fsinfo_for_pci_dev(syspath
, disk
, errp
);
1098 } else if (strstr(syspath
, "/devices/css")) {
1099 has_hwinf
= build_guest_fsinfo_for_ccw_dev(syspath
, disk
, errp
);
1100 } else if (strstr(syspath
, "/virtio")) {
1101 has_hwinf
= build_guest_fsinfo_for_nonpci_virtio(syspath
, disk
, errp
);
1103 g_debug("Unsupported device type for '%s'", syspath
);
1107 if (has_hwinf
|| disk
->has_dev
|| disk
->has_serial
) {
1108 QAPI_LIST_PREPEND(fs
->disk
, disk
);
1110 qapi_free_GuestDiskAddress(disk
);
1114 static void build_guest_fsinfo_for_device(char const *devpath
,
1115 GuestFilesystemInfo
*fs
,
1118 /* Store a list of slave devices of virtual volume specified by @syspath into
1120 static void build_guest_fsinfo_for_virtual_device(char const *syspath
,
1121 GuestFilesystemInfo
*fs
,
1127 struct dirent
*entry
;
1129 dirpath
= g_strdup_printf("%s/slaves", syspath
);
1130 dir
= opendir(dirpath
);
1132 if (errno
!= ENOENT
) {
1133 error_setg_errno(errp
, errno
, "opendir(\"%s\")", dirpath
);
1141 entry
= readdir(dir
);
1142 if (entry
== NULL
) {
1144 error_setg_errno(errp
, errno
, "readdir(\"%s\")", dirpath
);
1149 if (entry
->d_type
== DT_LNK
) {
1152 g_debug(" slave device '%s'", entry
->d_name
);
1153 path
= g_strdup_printf("%s/slaves/%s", syspath
, entry
->d_name
);
1154 build_guest_fsinfo_for_device(path
, fs
, &err
);
1158 error_propagate(errp
, err
);
1168 static bool is_disk_virtual(const char *devpath
, Error
**errp
)
1170 g_autofree
char *syspath
= realpath(devpath
, NULL
);
1173 error_setg_errno(errp
, errno
, "realpath(\"%s\")", devpath
);
1176 return strstr(syspath
, "/devices/virtual/block/") != NULL
;
1179 /* Dispatch to functions for virtual/real device */
1180 static void build_guest_fsinfo_for_device(char const *devpath
,
1181 GuestFilesystemInfo
*fs
,
1185 g_autofree
char *syspath
= NULL
;
1186 bool is_virtual
= false;
1188 syspath
= realpath(devpath
, NULL
);
1190 error_setg_errno(errp
, errno
, "realpath(\"%s\")", devpath
);
1195 fs
->name
= g_path_get_basename(syspath
);
1198 g_debug(" parse sysfs path '%s'", syspath
);
1199 is_virtual
= is_disk_virtual(syspath
, errp
);
1200 if (*errp
!= NULL
) {
1204 build_guest_fsinfo_for_virtual_device(syspath
, fs
, errp
);
1206 build_guest_fsinfo_for_real_device(syspath
, fs
, errp
);
1210 #ifdef CONFIG_LIBUDEV
1213 * Wrapper around build_guest_fsinfo_for_device() for getting just
1216 static GuestDiskAddress
*get_disk_address(const char *syspath
, Error
**errp
)
1218 g_autoptr(GuestFilesystemInfo
) fs
= NULL
;
1220 fs
= g_new0(GuestFilesystemInfo
, 1);
1221 build_guest_fsinfo_for_device(syspath
, fs
, errp
);
1222 if (fs
->disk
!= NULL
) {
1223 return g_steal_pointer(&fs
->disk
->value
);
1228 static char *get_alias_for_syspath(const char *syspath
)
1230 struct udev
*udev
= NULL
;
1231 struct udev_device
*udevice
= NULL
;
1236 g_debug("failed to query udev");
1239 udevice
= udev_device_new_from_syspath(udev
, syspath
);
1240 if (udevice
== NULL
) {
1241 g_debug("failed to query udev for path: %s", syspath
);
1244 const char *alias
= udev_device_get_property_value(
1245 udevice
, "DM_NAME");
1247 * NULL means there was an error and empty string means there is no
1248 * alias. In case of no alias we return NULL instead of empty string.
1250 if (alias
== NULL
) {
1251 g_debug("failed to query udev for device alias for: %s",
1253 } else if (*alias
!= 0) {
1254 ret
= g_strdup(alias
);
1260 udev_device_unref(udevice
);
1264 static char *get_device_for_syspath(const char *syspath
)
1266 struct udev
*udev
= NULL
;
1267 struct udev_device
*udevice
= NULL
;
1272 g_debug("failed to query udev");
1275 udevice
= udev_device_new_from_syspath(udev
, syspath
);
1276 if (udevice
== NULL
) {
1277 g_debug("failed to query udev for path: %s", syspath
);
1280 ret
= g_strdup(udev_device_get_devnode(udevice
));
1285 udev_device_unref(udevice
);
1289 static void get_disk_deps(const char *disk_dir
, GuestDiskInfo
*disk
)
1291 g_autofree
char *deps_dir
= NULL
;
1293 GDir
*dp_deps
= NULL
;
1295 /* List dependent disks */
1296 deps_dir
= g_strdup_printf("%s/slaves", disk_dir
);
1297 g_debug(" listing entries in: %s", deps_dir
);
1298 dp_deps
= g_dir_open(deps_dir
, 0, NULL
);
1299 if (dp_deps
== NULL
) {
1300 g_debug("failed to list entries in %s", deps_dir
);
1303 disk
->has_dependencies
= true;
1304 while ((dep
= g_dir_read_name(dp_deps
)) != NULL
) {
1305 g_autofree
char *dep_dir
= NULL
;
1308 /* Add dependent disks */
1309 dep_dir
= g_strdup_printf("%s/%s", deps_dir
, dep
);
1310 dev_name
= get_device_for_syspath(dep_dir
);
1311 if (dev_name
!= NULL
) {
1312 g_debug(" adding dependent device: %s", dev_name
);
1313 QAPI_LIST_PREPEND(disk
->dependencies
, dev_name
);
1316 g_dir_close(dp_deps
);
1320 * Detect partitions subdirectory, name is "<disk_name><number>" or
1321 * "<disk_name>p<number>"
1323 * @disk_name -- last component of /sys path (e.g. sda)
1324 * @disk_dir -- sys path of the disk (e.g. /sys/block/sda)
1325 * @disk_dev -- device node of the disk (e.g. /dev/sda)
1327 static GuestDiskInfoList
*get_disk_partitions(
1328 GuestDiskInfoList
*list
,
1329 const char *disk_name
, const char *disk_dir
,
1330 const char *disk_dev
)
1332 GuestDiskInfoList
*ret
= list
;
1333 struct dirent
*de_disk
;
1334 DIR *dp_disk
= NULL
;
1335 size_t len
= strlen(disk_name
);
1337 dp_disk
= opendir(disk_dir
);
1338 while ((de_disk
= readdir(dp_disk
)) != NULL
) {
1339 g_autofree
char *partition_dir
= NULL
;
1341 GuestDiskInfo
*partition
;
1343 if (!(de_disk
->d_type
& DT_DIR
)) {
1347 if (!(strncmp(disk_name
, de_disk
->d_name
, len
) == 0 &&
1348 ((*(de_disk
->d_name
+ len
) == 'p' &&
1349 isdigit(*(de_disk
->d_name
+ len
+ 1))) ||
1350 isdigit(*(de_disk
->d_name
+ len
))))) {
1354 partition_dir
= g_strdup_printf("%s/%s",
1355 disk_dir
, de_disk
->d_name
);
1356 dev_name
= get_device_for_syspath(partition_dir
);
1357 if (dev_name
== NULL
) {
1358 g_debug("Failed to get device name for syspath: %s",
1362 partition
= g_new0(GuestDiskInfo
, 1);
1363 partition
->name
= dev_name
;
1364 partition
->partition
= true;
1365 partition
->has_dependencies
= true;
1366 /* Add parent disk as dependent for easier tracking of hierarchy */
1367 QAPI_LIST_PREPEND(partition
->dependencies
, g_strdup(disk_dev
));
1369 QAPI_LIST_PREPEND(ret
, partition
);
1376 GuestDiskInfoList
*qmp_guest_get_disks(Error
**errp
)
1378 GuestDiskInfoList
*ret
= NULL
;
1379 GuestDiskInfo
*disk
;
1381 struct dirent
*de
= NULL
;
1383 g_debug("listing /sys/block directory");
1384 dp
= opendir("/sys/block");
1386 error_setg_errno(errp
, errno
, "Can't open directory \"/sys/block\"");
1389 while ((de
= readdir(dp
)) != NULL
) {
1390 g_autofree
char *disk_dir
= NULL
, *line
= NULL
,
1393 Error
*local_err
= NULL
;
1394 if (de
->d_type
!= DT_LNK
) {
1395 g_debug(" skipping entry: %s", de
->d_name
);
1399 /* Check size and skip zero-sized disks */
1400 g_debug(" checking disk size");
1401 size_path
= g_strdup_printf("/sys/block/%s/size", de
->d_name
);
1402 if (!g_file_get_contents(size_path
, &line
, NULL
, NULL
)) {
1403 g_debug(" failed to read disk size");
1406 if (g_strcmp0(line
, "0\n") == 0) {
1407 g_debug(" skipping zero-sized disk");
1411 g_debug(" adding %s", de
->d_name
);
1412 disk_dir
= g_strdup_printf("/sys/block/%s", de
->d_name
);
1413 dev_name
= get_device_for_syspath(disk_dir
);
1414 if (dev_name
== NULL
) {
1415 g_debug("Failed to get device name for syspath: %s",
1419 disk
= g_new0(GuestDiskInfo
, 1);
1420 disk
->name
= dev_name
;
1421 disk
->partition
= false;
1422 disk
->alias
= get_alias_for_syspath(disk_dir
);
1423 disk
->has_alias
= (disk
->alias
!= NULL
);
1424 QAPI_LIST_PREPEND(ret
, disk
);
1426 /* Get address for non-virtual devices */
1427 bool is_virtual
= is_disk_virtual(disk_dir
, &local_err
);
1428 if (local_err
!= NULL
) {
1429 g_debug(" failed to check disk path, ignoring error: %s",
1430 error_get_pretty(local_err
));
1431 error_free(local_err
);
1433 /* Don't try to get the address */
1437 disk
->address
= get_disk_address(disk_dir
, &local_err
);
1438 if (local_err
!= NULL
) {
1439 g_debug(" failed to get device info, ignoring error: %s",
1440 error_get_pretty(local_err
));
1441 error_free(local_err
);
1443 } else if (disk
->address
!= NULL
) {
1444 disk
->has_address
= true;
1448 get_disk_deps(disk_dir
, disk
);
1449 ret
= get_disk_partitions(ret
, de
->d_name
, disk_dir
, dev_name
);
1459 GuestDiskInfoList
*qmp_guest_get_disks(Error
**errp
)
1461 error_setg(errp
, QERR_UNSUPPORTED
);
1467 /* Return a list of the disk device(s)' info which @mount lies on */
1468 static GuestFilesystemInfo
*build_guest_fsinfo(struct FsMount
*mount
,
1471 GuestFilesystemInfo
*fs
= g_malloc0(sizeof(*fs
));
1473 unsigned long used
, nonroot_total
, fr_size
;
1474 char *devpath
= g_strdup_printf("/sys/dev/block/%u:%u",
1475 mount
->devmajor
, mount
->devminor
);
1477 fs
->mountpoint
= g_strdup(mount
->dirname
);
1478 fs
->type
= g_strdup(mount
->devtype
);
1479 build_guest_fsinfo_for_device(devpath
, fs
, errp
);
1481 if (statvfs(fs
->mountpoint
, &buf
) == 0) {
1482 fr_size
= buf
.f_frsize
;
1483 used
= buf
.f_blocks
- buf
.f_bfree
;
1484 nonroot_total
= used
+ buf
.f_bavail
;
1485 fs
->used_bytes
= used
* fr_size
;
1486 fs
->total_bytes
= nonroot_total
* fr_size
;
1488 fs
->has_total_bytes
= true;
1489 fs
->has_used_bytes
= true;
1497 GuestFilesystemInfoList
*qmp_guest_get_fsinfo(Error
**errp
)
1500 struct FsMount
*mount
;
1501 GuestFilesystemInfoList
*ret
= NULL
;
1502 Error
*local_err
= NULL
;
1504 QTAILQ_INIT(&mounts
);
1505 build_fs_mount_list(&mounts
, &local_err
);
1507 error_propagate(errp
, local_err
);
1511 QTAILQ_FOREACH(mount
, &mounts
, next
) {
1512 g_debug("Building guest fsinfo for '%s'", mount
->dirname
);
1514 QAPI_LIST_PREPEND(ret
, build_guest_fsinfo(mount
, &local_err
));
1516 error_propagate(errp
, local_err
);
1517 qapi_free_GuestFilesystemInfoList(ret
);
1523 free_fs_mount_list(&mounts
);
1529 FSFREEZE_HOOK_THAW
= 0,
1530 FSFREEZE_HOOK_FREEZE
,
1533 static const char *fsfreeze_hook_arg_string
[] = {
1538 static void execute_fsfreeze_hook(FsfreezeHookArg arg
, Error
**errp
)
1543 const char *arg_str
= fsfreeze_hook_arg_string
[arg
];
1544 Error
*local_err
= NULL
;
1546 hook
= ga_fsfreeze_hook(ga_state
);
1550 if (access(hook
, X_OK
) != 0) {
1551 error_setg_errno(errp
, errno
, "can't access fsfreeze hook '%s'", hook
);
1555 slog("executing fsfreeze hook with arg '%s'", arg_str
);
1559 reopen_fd_to_null(0);
1560 reopen_fd_to_null(1);
1561 reopen_fd_to_null(2);
1563 execle(hook
, hook
, arg_str
, NULL
, environ
);
1564 _exit(EXIT_FAILURE
);
1565 } else if (pid
< 0) {
1566 error_setg_errno(errp
, errno
, "failed to create child process");
1570 ga_wait_child(pid
, &status
, &local_err
);
1572 error_propagate(errp
, local_err
);
1576 if (!WIFEXITED(status
)) {
1577 error_setg(errp
, "fsfreeze hook has terminated abnormally");
1581 status
= WEXITSTATUS(status
);
1583 error_setg(errp
, "fsfreeze hook has failed with status %d", status
);
1589 * Return status of freeze/thaw
1591 GuestFsfreezeStatus
qmp_guest_fsfreeze_status(Error
**errp
)
1593 if (ga_is_frozen(ga_state
)) {
1594 return GUEST_FSFREEZE_STATUS_FROZEN
;
1597 return GUEST_FSFREEZE_STATUS_THAWED
;
1600 int64_t qmp_guest_fsfreeze_freeze(Error
**errp
)
1602 return qmp_guest_fsfreeze_freeze_list(false, NULL
, errp
);
1606 * Walk list of mounted file systems in the guest, and freeze the ones which
1607 * are real local file systems.
1609 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints
,
1610 strList
*mountpoints
,
1616 struct FsMount
*mount
;
1617 Error
*local_err
= NULL
;
1620 slog("guest-fsfreeze called");
1622 execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE
, &local_err
);
1624 error_propagate(errp
, local_err
);
1628 QTAILQ_INIT(&mounts
);
1629 build_fs_mount_list(&mounts
, &local_err
);
1631 error_propagate(errp
, local_err
);
1635 /* cannot risk guest agent blocking itself on a write in this state */
1636 ga_set_frozen(ga_state
);
1638 QTAILQ_FOREACH_REVERSE(mount
, &mounts
, next
) {
1639 /* To issue fsfreeze in the reverse order of mounts, check if the
1640 * mount is listed in the list here */
1641 if (has_mountpoints
) {
1642 for (list
= mountpoints
; list
; list
= list
->next
) {
1643 if (strcmp(list
->value
, mount
->dirname
) == 0) {
1652 fd
= qemu_open_old(mount
->dirname
, O_RDONLY
);
1654 error_setg_errno(errp
, errno
, "failed to open %s", mount
->dirname
);
1658 /* we try to cull filesystems we know won't work in advance, but other
1659 * filesystems may not implement fsfreeze for less obvious reasons.
1660 * these will report EOPNOTSUPP. we simply ignore these when tallying
1661 * the number of frozen filesystems.
1662 * if a filesystem is mounted more than once (aka bind mount) a
1663 * consecutive attempt to freeze an already frozen filesystem will
1666 * any other error means a failure to freeze a filesystem we
1667 * expect to be freezable, so return an error in those cases
1668 * and return system to thawed state.
1670 ret
= ioctl(fd
, FIFREEZE
);
1672 if (errno
!= EOPNOTSUPP
&& errno
!= EBUSY
) {
1673 error_setg_errno(errp
, errno
, "failed to freeze %s",
1684 free_fs_mount_list(&mounts
);
1685 /* We may not issue any FIFREEZE here.
1686 * Just unset ga_state here and ready for the next call.
1689 ga_unset_frozen(ga_state
);
1694 free_fs_mount_list(&mounts
);
1695 qmp_guest_fsfreeze_thaw(NULL
);
1700 * Walk list of frozen file systems in the guest, and thaw them.
1702 int64_t qmp_guest_fsfreeze_thaw(Error
**errp
)
1707 int fd
, i
= 0, logged
;
1708 Error
*local_err
= NULL
;
1710 QTAILQ_INIT(&mounts
);
1711 build_fs_mount_list(&mounts
, &local_err
);
1713 error_propagate(errp
, local_err
);
1717 QTAILQ_FOREACH(mount
, &mounts
, next
) {
1719 fd
= qemu_open_old(mount
->dirname
, O_RDONLY
);
1723 /* we have no way of knowing whether a filesystem was actually unfrozen
1724 * as a result of a successful call to FITHAW, only that if an error
1725 * was returned the filesystem was *not* unfrozen by that particular
1728 * since multiple preceding FIFREEZEs require multiple calls to FITHAW
1729 * to unfreeze, continuing issuing FITHAW until an error is returned,
1730 * in which case either the filesystem is in an unfreezable state, or,
1731 * more likely, it was thawed previously (and remains so afterward).
1733 * also, since the most recent successful call is the one that did
1734 * the actual unfreeze, we can use this to provide an accurate count
1735 * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which
1736 * may * be useful for determining whether a filesystem was unfrozen
1737 * during the freeze/thaw phase by a process other than qemu-ga.
1740 ret
= ioctl(fd
, FITHAW
);
1741 if (ret
== 0 && !logged
) {
1749 ga_unset_frozen(ga_state
);
1750 free_fs_mount_list(&mounts
);
1752 execute_fsfreeze_hook(FSFREEZE_HOOK_THAW
, errp
);
1757 static void guest_fsfreeze_cleanup(void)
1761 if (ga_is_frozen(ga_state
) == GUEST_FSFREEZE_STATUS_FROZEN
) {
1762 qmp_guest_fsfreeze_thaw(&err
);
1764 slog("failed to clean up frozen filesystems: %s",
1765 error_get_pretty(err
));
1770 #endif /* CONFIG_FSFREEZE */
1772 #if defined(CONFIG_FSTRIM)
1774 * Walk list of mounted file systems in the guest, and trim them.
1776 GuestFilesystemTrimResponse
*
1777 qmp_guest_fstrim(bool has_minimum
, int64_t minimum
, Error
**errp
)
1779 GuestFilesystemTrimResponse
*response
;
1780 GuestFilesystemTrimResult
*result
;
1783 struct FsMount
*mount
;
1785 Error
*local_err
= NULL
;
1786 struct fstrim_range r
;
1788 slog("guest-fstrim called");
1790 QTAILQ_INIT(&mounts
);
1791 build_fs_mount_list(&mounts
, &local_err
);
1793 error_propagate(errp
, local_err
);
1797 response
= g_malloc0(sizeof(*response
));
1799 QTAILQ_FOREACH(mount
, &mounts
, next
) {
1800 result
= g_malloc0(sizeof(*result
));
1801 result
->path
= g_strdup(mount
->dirname
);
1803 QAPI_LIST_PREPEND(response
->paths
, result
);
1805 fd
= qemu_open_old(mount
->dirname
, O_RDONLY
);
1807 result
->error
= g_strdup_printf("failed to open: %s",
1809 result
->has_error
= true;
1813 /* We try to cull filesystems we know won't work in advance, but other
1814 * filesystems may not implement fstrim for less obvious reasons.
1815 * These will report EOPNOTSUPP; while in some other cases ENOTTY
1816 * will be reported (e.g. CD-ROMs).
1817 * Any other error means an unexpected error.
1821 r
.minlen
= has_minimum
? minimum
: 0;
1822 ret
= ioctl(fd
, FITRIM
, &r
);
1824 result
->has_error
= true;
1825 if (errno
== ENOTTY
|| errno
== EOPNOTSUPP
) {
1826 result
->error
= g_strdup("trim not supported");
1828 result
->error
= g_strdup_printf("failed to trim: %s",
1835 result
->has_minimum
= true;
1836 result
->minimum
= r
.minlen
;
1837 result
->has_trimmed
= true;
1838 result
->trimmed
= r
.len
;
1842 free_fs_mount_list(&mounts
);
1845 #endif /* CONFIG_FSTRIM */
1848 #define LINUX_SYS_STATE_FILE "/sys/power/state"
1849 #define SUSPEND_SUPPORTED 0
1850 #define SUSPEND_NOT_SUPPORTED 1
1853 SUSPEND_MODE_DISK
= 0,
1854 SUSPEND_MODE_RAM
= 1,
1855 SUSPEND_MODE_HYBRID
= 2,
1859 * Executes a command in a child process using g_spawn_sync,
1860 * returning an int >= 0 representing the exit status of the
1863 * If the program wasn't found in path, returns -1.
1865 * If a problem happened when creating the child process,
1866 * returns -1 and errp is set.
1868 static int run_process_child(const char *command
[], Error
**errp
)
1870 int exit_status
, spawn_flag
;
1871 GError
*g_err
= NULL
;
1874 spawn_flag
= G_SPAWN_SEARCH_PATH
| G_SPAWN_STDOUT_TO_DEV_NULL
|
1875 G_SPAWN_STDERR_TO_DEV_NULL
;
1877 success
= g_spawn_sync(NULL
, (char **)command
, environ
, spawn_flag
,
1878 NULL
, NULL
, NULL
, NULL
,
1879 &exit_status
, &g_err
);
1882 return WEXITSTATUS(exit_status
);
1885 if (g_err
&& (g_err
->code
!= G_SPAWN_ERROR_NOENT
)) {
1886 error_setg(errp
, "failed to create child process, error '%s'",
1890 g_error_free(g_err
);
1894 static bool systemd_supports_mode(SuspendMode mode
, Error
**errp
)
1896 const char *systemctl_args
[3] = {"systemd-hibernate", "systemd-suspend",
1897 "systemd-hybrid-sleep"};
1898 const char *cmd
[4] = {"systemctl", "status", systemctl_args
[mode
], NULL
};
1901 status
= run_process_child(cmd
, errp
);
1904 * systemctl status uses LSB return codes so we can expect
1905 * status > 0 and be ok. To assert if the guest has support
1906 * for the selected suspend mode, status should be < 4. 4 is
1907 * the code for unknown service status, the return value when
1908 * the service does not exist. A common value is status = 3
1909 * (program is not running).
1911 if (status
> 0 && status
< 4) {
1918 static void systemd_suspend(SuspendMode mode
, Error
**errp
)
1920 Error
*local_err
= NULL
;
1921 const char *systemctl_args
[3] = {"hibernate", "suspend", "hybrid-sleep"};
1922 const char *cmd
[3] = {"systemctl", systemctl_args
[mode
], NULL
};
1925 status
= run_process_child(cmd
, &local_err
);
1931 if ((status
== -1) && !local_err
) {
1932 error_setg(errp
, "the helper program 'systemctl %s' was not found",
1933 systemctl_args
[mode
]);
1938 error_propagate(errp
, local_err
);
1940 error_setg(errp
, "the helper program 'systemctl %s' returned an "
1941 "unexpected exit status code (%d)",
1942 systemctl_args
[mode
], status
);
1946 static bool pmutils_supports_mode(SuspendMode mode
, Error
**errp
)
1948 Error
*local_err
= NULL
;
1949 const char *pmutils_args
[3] = {"--hibernate", "--suspend",
1950 "--suspend-hybrid"};
1951 const char *cmd
[3] = {"pm-is-supported", pmutils_args
[mode
], NULL
};
1954 status
= run_process_child(cmd
, &local_err
);
1956 if (status
== SUSPEND_SUPPORTED
) {
1960 if ((status
== -1) && !local_err
) {
1965 error_propagate(errp
, local_err
);
1968 "the helper program '%s' returned an unexpected exit"
1969 " status code (%d)", "pm-is-supported", status
);
1975 static void pmutils_suspend(SuspendMode mode
, Error
**errp
)
1977 Error
*local_err
= NULL
;
1978 const char *pmutils_binaries
[3] = {"pm-hibernate", "pm-suspend",
1979 "pm-suspend-hybrid"};
1980 const char *cmd
[2] = {pmutils_binaries
[mode
], NULL
};
1983 status
= run_process_child(cmd
, &local_err
);
1989 if ((status
== -1) && !local_err
) {
1990 error_setg(errp
, "the helper program '%s' was not found",
1991 pmutils_binaries
[mode
]);
1996 error_propagate(errp
, local_err
);
1999 "the helper program '%s' returned an unexpected exit"
2000 " status code (%d)", pmutils_binaries
[mode
], status
);
2004 static bool linux_sys_state_supports_mode(SuspendMode mode
, Error
**errp
)
2006 const char *sysfile_strs
[3] = {"disk", "mem", NULL
};
2007 const char *sysfile_str
= sysfile_strs
[mode
];
2008 char buf
[32]; /* hopefully big enough */
2013 error_setg(errp
, "unknown guest suspend mode");
2017 fd
= open(LINUX_SYS_STATE_FILE
, O_RDONLY
);
2022 ret
= read(fd
, buf
, sizeof(buf
) - 1);
2029 if (strstr(buf
, sysfile_str
)) {
2035 static void linux_sys_state_suspend(SuspendMode mode
, Error
**errp
)
2037 Error
*local_err
= NULL
;
2038 const char *sysfile_strs
[3] = {"disk", "mem", NULL
};
2039 const char *sysfile_str
= sysfile_strs
[mode
];
2044 error_setg(errp
, "unknown guest suspend mode");
2054 reopen_fd_to_null(0);
2055 reopen_fd_to_null(1);
2056 reopen_fd_to_null(2);
2058 fd
= open(LINUX_SYS_STATE_FILE
, O_WRONLY
);
2060 _exit(EXIT_FAILURE
);
2063 if (write(fd
, sysfile_str
, strlen(sysfile_str
)) < 0) {
2064 _exit(EXIT_FAILURE
);
2067 _exit(EXIT_SUCCESS
);
2068 } else if (pid
< 0) {
2069 error_setg_errno(errp
, errno
, "failed to create child process");
2073 ga_wait_child(pid
, &status
, &local_err
);
2075 error_propagate(errp
, local_err
);
2079 if (WEXITSTATUS(status
)) {
2080 error_setg(errp
, "child process has failed to suspend");
2085 static void guest_suspend(SuspendMode mode
, Error
**errp
)
2087 Error
*local_err
= NULL
;
2088 bool mode_supported
= false;
2090 if (systemd_supports_mode(mode
, &local_err
)) {
2091 mode_supported
= true;
2092 systemd_suspend(mode
, &local_err
);
2099 error_free(local_err
);
2102 if (pmutils_supports_mode(mode
, &local_err
)) {
2103 mode_supported
= true;
2104 pmutils_suspend(mode
, &local_err
);
2111 error_free(local_err
);
2114 if (linux_sys_state_supports_mode(mode
, &local_err
)) {
2115 mode_supported
= true;
2116 linux_sys_state_suspend(mode
, &local_err
);
2119 if (!mode_supported
) {
2120 error_free(local_err
);
2122 "the requested suspend mode is not supported by the guest");
2124 error_propagate(errp
, local_err
);
2128 void qmp_guest_suspend_disk(Error
**errp
)
2130 guest_suspend(SUSPEND_MODE_DISK
, errp
);
2133 void qmp_guest_suspend_ram(Error
**errp
)
2135 guest_suspend(SUSPEND_MODE_RAM
, errp
);
2138 void qmp_guest_suspend_hybrid(Error
**errp
)
2140 guest_suspend(SUSPEND_MODE_HYBRID
, errp
);
2143 static GuestNetworkInterface
*
2144 guest_find_interface(GuestNetworkInterfaceList
*head
,
2147 for (; head
; head
= head
->next
) {
2148 if (strcmp(head
->value
->name
, name
) == 0) {
2156 static int guest_get_network_stats(const char *name
,
2157 GuestNetworkInterfaceStat
*stats
)
2160 char const *devinfo
= "/proc/net/dev";
2162 char *line
= NULL
, *colon
;
2164 fp
= fopen(devinfo
, "r");
2168 name_len
= strlen(name
);
2169 while (getline(&line
, &n
, fp
) != -1) {
2172 long long rx_packets
;
2174 long long rx_dropped
;
2176 long long tx_packets
;
2178 long long tx_dropped
;
2180 trim_line
= g_strchug(line
);
2181 if (trim_line
[0] == '\0') {
2184 colon
= strchr(trim_line
, ':');
2188 if (colon
- name_len
== trim_line
&&
2189 strncmp(trim_line
, name
, name_len
) == 0) {
2190 if (sscanf(colon
+ 1,
2191 "%lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld",
2192 &rx_bytes
, &rx_packets
, &rx_errs
, &rx_dropped
,
2193 &dummy
, &dummy
, &dummy
, &dummy
,
2194 &tx_bytes
, &tx_packets
, &tx_errs
, &tx_dropped
,
2195 &dummy
, &dummy
, &dummy
, &dummy
) != 16) {
2198 stats
->rx_bytes
= rx_bytes
;
2199 stats
->rx_packets
= rx_packets
;
2200 stats
->rx_errs
= rx_errs
;
2201 stats
->rx_dropped
= rx_dropped
;
2202 stats
->tx_bytes
= tx_bytes
;
2203 stats
->tx_packets
= tx_packets
;
2204 stats
->tx_errs
= tx_errs
;
2205 stats
->tx_dropped
= tx_dropped
;
2213 g_debug("/proc/net/dev: Interface '%s' not found", name
);
2218 * Build information about guest interfaces
2220 GuestNetworkInterfaceList
*qmp_guest_network_get_interfaces(Error
**errp
)
2222 GuestNetworkInterfaceList
*head
= NULL
, **tail
= &head
;
2223 struct ifaddrs
*ifap
, *ifa
;
2225 if (getifaddrs(&ifap
) < 0) {
2226 error_setg_errno(errp
, errno
, "getifaddrs failed");
2230 for (ifa
= ifap
; ifa
; ifa
= ifa
->ifa_next
) {
2231 GuestNetworkInterface
*info
;
2232 GuestIpAddressList
**address_tail
;
2233 GuestIpAddress
*address_item
= NULL
;
2234 GuestNetworkInterfaceStat
*interface_stat
= NULL
;
2235 char addr4
[INET_ADDRSTRLEN
];
2236 char addr6
[INET6_ADDRSTRLEN
];
2239 unsigned char *mac_addr
;
2242 g_debug("Processing %s interface", ifa
->ifa_name
);
2244 info
= guest_find_interface(head
, ifa
->ifa_name
);
2247 info
= g_malloc0(sizeof(*info
));
2248 info
->name
= g_strdup(ifa
->ifa_name
);
2250 QAPI_LIST_APPEND(tail
, info
);
2253 if (!info
->has_hardware_address
&& ifa
->ifa_flags
& SIOCGIFHWADDR
) {
2254 /* we haven't obtained HW address yet */
2255 sock
= socket(PF_INET
, SOCK_STREAM
, 0);
2257 error_setg_errno(errp
, errno
, "failed to create socket");
2261 memset(&ifr
, 0, sizeof(ifr
));
2262 pstrcpy(ifr
.ifr_name
, IF_NAMESIZE
, info
->name
);
2263 if (ioctl(sock
, SIOCGIFHWADDR
, &ifr
) == -1) {
2264 error_setg_errno(errp
, errno
,
2265 "failed to get MAC address of %s",
2272 mac_addr
= (unsigned char *) &ifr
.ifr_hwaddr
.sa_data
;
2274 info
->hardware_address
=
2275 g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x",
2276 (int) mac_addr
[0], (int) mac_addr
[1],
2277 (int) mac_addr
[2], (int) mac_addr
[3],
2278 (int) mac_addr
[4], (int) mac_addr
[5]);
2280 info
->has_hardware_address
= true;
2283 if (ifa
->ifa_addr
&&
2284 ifa
->ifa_addr
->sa_family
== AF_INET
) {
2285 /* interface with IPv4 address */
2286 p
= &((struct sockaddr_in
*)ifa
->ifa_addr
)->sin_addr
;
2287 if (!inet_ntop(AF_INET
, p
, addr4
, sizeof(addr4
))) {
2288 error_setg_errno(errp
, errno
, "inet_ntop failed");
2292 address_item
= g_malloc0(sizeof(*address_item
));
2293 address_item
->ip_address
= g_strdup(addr4
);
2294 address_item
->ip_address_type
= GUEST_IP_ADDRESS_TYPE_IPV4
;
2296 if (ifa
->ifa_netmask
) {
2297 /* Count the number of set bits in netmask.
2298 * This is safe as '1' and '0' cannot be shuffled in netmask. */
2299 p
= &((struct sockaddr_in
*)ifa
->ifa_netmask
)->sin_addr
;
2300 address_item
->prefix
= ctpop32(((uint32_t *) p
)[0]);
2302 } else if (ifa
->ifa_addr
&&
2303 ifa
->ifa_addr
->sa_family
== AF_INET6
) {
2304 /* interface with IPv6 address */
2305 p
= &((struct sockaddr_in6
*)ifa
->ifa_addr
)->sin6_addr
;
2306 if (!inet_ntop(AF_INET6
, p
, addr6
, sizeof(addr6
))) {
2307 error_setg_errno(errp
, errno
, "inet_ntop failed");
2311 address_item
= g_malloc0(sizeof(*address_item
));
2312 address_item
->ip_address
= g_strdup(addr6
);
2313 address_item
->ip_address_type
= GUEST_IP_ADDRESS_TYPE_IPV6
;
2315 if (ifa
->ifa_netmask
) {
2316 /* Count the number of set bits in netmask.
2317 * This is safe as '1' and '0' cannot be shuffled in netmask. */
2318 p
= &((struct sockaddr_in6
*)ifa
->ifa_netmask
)->sin6_addr
;
2319 address_item
->prefix
=
2320 ctpop32(((uint32_t *) p
)[0]) +
2321 ctpop32(((uint32_t *) p
)[1]) +
2322 ctpop32(((uint32_t *) p
)[2]) +
2323 ctpop32(((uint32_t *) p
)[3]);
2327 if (!address_item
) {
2331 address_tail
= &info
->ip_addresses
;
2332 while (*address_tail
) {
2333 address_tail
= &(*address_tail
)->next
;
2335 QAPI_LIST_APPEND(address_tail
, address_item
);
2337 info
->has_ip_addresses
= true;
2339 if (!info
->has_statistics
) {
2340 interface_stat
= g_malloc0(sizeof(*interface_stat
));
2341 if (guest_get_network_stats(info
->name
, interface_stat
) == -1) {
2342 info
->has_statistics
= false;
2343 g_free(interface_stat
);
2345 info
->statistics
= interface_stat
;
2346 info
->has_statistics
= true;
2356 qapi_free_GuestNetworkInterfaceList(head
);
2360 /* Transfer online/offline status between @vcpu and the guest system.
2362 * On input either @errp or *@errp must be NULL.
2364 * In system-to-@vcpu direction, the following @vcpu fields are accessed:
2365 * - R: vcpu->logical_id
2367 * - W: vcpu->can_offline
2369 * In @vcpu-to-system direction, the following @vcpu fields are accessed:
2370 * - R: vcpu->logical_id
2373 * Written members remain unmodified on error.
2375 static void transfer_vcpu(GuestLogicalProcessor
*vcpu
, bool sys2vcpu
,
2376 char *dirpath
, Error
**errp
)
2381 static const char fn
[] = "online";
2383 dirfd
= open(dirpath
, O_RDONLY
| O_DIRECTORY
);
2385 error_setg_errno(errp
, errno
, "open(\"%s\")", dirpath
);
2389 fd
= openat(dirfd
, fn
, sys2vcpu
? O_RDONLY
: O_RDWR
);
2391 if (errno
!= ENOENT
) {
2392 error_setg_errno(errp
, errno
, "open(\"%s/%s\")", dirpath
, fn
);
2393 } else if (sys2vcpu
) {
2394 vcpu
->online
= true;
2395 vcpu
->can_offline
= false;
2396 } else if (!vcpu
->online
) {
2397 error_setg(errp
, "logical processor #%" PRId64
" can't be "
2398 "offlined", vcpu
->logical_id
);
2399 } /* otherwise pretend successful re-onlining */
2401 unsigned char status
;
2403 res
= pread(fd
, &status
, 1, 0);
2405 error_setg_errno(errp
, errno
, "pread(\"%s/%s\")", dirpath
, fn
);
2406 } else if (res
== 0) {
2407 error_setg(errp
, "pread(\"%s/%s\"): unexpected EOF", dirpath
,
2409 } else if (sys2vcpu
) {
2410 vcpu
->online
= (status
!= '0');
2411 vcpu
->can_offline
= true;
2412 } else if (vcpu
->online
!= (status
!= '0')) {
2413 status
= '0' + vcpu
->online
;
2414 if (pwrite(fd
, &status
, 1, 0) == -1) {
2415 error_setg_errno(errp
, errno
, "pwrite(\"%s/%s\")", dirpath
,
2418 } /* otherwise pretend successful re-(on|off)-lining */
2428 GuestLogicalProcessorList
*qmp_guest_get_vcpus(Error
**errp
)
2430 GuestLogicalProcessorList
*head
, **tail
;
2431 const char *cpu_dir
= "/sys/devices/system/cpu";
2433 g_autoptr(GDir
) cpu_gdir
= NULL
;
2434 Error
*local_err
= NULL
;
2438 cpu_gdir
= g_dir_open(cpu_dir
, 0, NULL
);
2440 if (cpu_gdir
== NULL
) {
2441 error_setg_errno(errp
, errno
, "failed to list entries: %s", cpu_dir
);
2445 while (local_err
== NULL
&& (line
= g_dir_read_name(cpu_gdir
)) != NULL
) {
2446 GuestLogicalProcessor
*vcpu
;
2448 if (sscanf(line
, "cpu%" PRId64
, &id
)) {
2449 g_autofree
char *path
= g_strdup_printf("/sys/devices/system/cpu/"
2450 "cpu%" PRId64
"/", id
);
2451 vcpu
= g_malloc0(sizeof *vcpu
);
2452 vcpu
->logical_id
= id
;
2453 vcpu
->has_can_offline
= true; /* lolspeak ftw */
2454 transfer_vcpu(vcpu
, true, path
, &local_err
);
2455 QAPI_LIST_APPEND(tail
, vcpu
);
2459 if (local_err
== NULL
) {
2460 /* there's no guest with zero VCPUs */
2461 g_assert(head
!= NULL
);
2465 qapi_free_GuestLogicalProcessorList(head
);
2466 error_propagate(errp
, local_err
);
2470 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList
*vcpus
, Error
**errp
)
2473 Error
*local_err
= NULL
;
2476 while (vcpus
!= NULL
) {
2477 char *path
= g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64
"/",
2478 vcpus
->value
->logical_id
);
2480 transfer_vcpu(vcpus
->value
, false, path
, &local_err
);
2482 if (local_err
!= NULL
) {
2486 vcpus
= vcpus
->next
;
2489 if (local_err
!= NULL
) {
2490 if (processed
== 0) {
2491 error_propagate(errp
, local_err
);
2493 error_free(local_err
);
2500 void qmp_guest_set_user_password(const char *username
,
2501 const char *password
,
2505 Error
*local_err
= NULL
;
2506 char *passwd_path
= NULL
;
2509 int datafd
[2] = { -1, -1 };
2510 char *rawpasswddata
= NULL
;
2511 size_t rawpasswdlen
;
2512 char *chpasswddata
= NULL
;
2515 rawpasswddata
= (char *)qbase64_decode(password
, -1, &rawpasswdlen
, errp
);
2516 if (!rawpasswddata
) {
2519 rawpasswddata
= g_renew(char, rawpasswddata
, rawpasswdlen
+ 1);
2520 rawpasswddata
[rawpasswdlen
] = '\0';
2522 if (strchr(rawpasswddata
, '\n')) {
2523 error_setg(errp
, "forbidden characters in raw password");
2527 if (strchr(username
, '\n') ||
2528 strchr(username
, ':')) {
2529 error_setg(errp
, "forbidden characters in username");
2533 chpasswddata
= g_strdup_printf("%s:%s\n", username
, rawpasswddata
);
2534 chpasswdlen
= strlen(chpasswddata
);
2536 passwd_path
= g_find_program_in_path("chpasswd");
2539 error_setg(errp
, "cannot find 'passwd' program in PATH");
2543 if (pipe(datafd
) < 0) {
2544 error_setg(errp
, "cannot create pipe FDs");
2554 reopen_fd_to_null(1);
2555 reopen_fd_to_null(2);
2558 execle(passwd_path
, "chpasswd", "-e", NULL
, environ
);
2560 execle(passwd_path
, "chpasswd", NULL
, environ
);
2562 _exit(EXIT_FAILURE
);
2563 } else if (pid
< 0) {
2564 error_setg_errno(errp
, errno
, "failed to create child process");
2570 if (qemu_write_full(datafd
[1], chpasswddata
, chpasswdlen
) != chpasswdlen
) {
2571 error_setg_errno(errp
, errno
, "cannot write new account password");
2577 ga_wait_child(pid
, &status
, &local_err
);
2579 error_propagate(errp
, local_err
);
2583 if (!WIFEXITED(status
)) {
2584 error_setg(errp
, "child process has terminated abnormally");
2588 if (WEXITSTATUS(status
)) {
2589 error_setg(errp
, "child process has failed to set user password");
2594 g_free(chpasswddata
);
2595 g_free(rawpasswddata
);
2596 g_free(passwd_path
);
2597 if (datafd
[0] != -1) {
2600 if (datafd
[1] != -1) {
2605 static void ga_read_sysfs_file(int dirfd
, const char *pathname
, char *buf
,
2606 int size
, Error
**errp
)
2612 fd
= openat(dirfd
, pathname
, O_RDONLY
);
2614 error_setg_errno(errp
, errno
, "open sysfs file \"%s\"", pathname
);
2618 res
= pread(fd
, buf
, size
, 0);
2620 error_setg_errno(errp
, errno
, "pread sysfs file \"%s\"", pathname
);
2621 } else if (res
== 0) {
2622 error_setg(errp
, "pread sysfs file \"%s\": unexpected EOF", pathname
);
2627 static void ga_write_sysfs_file(int dirfd
, const char *pathname
,
2628 const char *buf
, int size
, Error
**errp
)
2633 fd
= openat(dirfd
, pathname
, O_WRONLY
);
2635 error_setg_errno(errp
, errno
, "open sysfs file \"%s\"", pathname
);
2639 if (pwrite(fd
, buf
, size
, 0) == -1) {
2640 error_setg_errno(errp
, errno
, "pwrite sysfs file \"%s\"", pathname
);
2646 /* Transfer online/offline status between @mem_blk and the guest system.
2648 * On input either @errp or *@errp must be NULL.
2650 * In system-to-@mem_blk direction, the following @mem_blk fields are accessed:
2651 * - R: mem_blk->phys_index
2652 * - W: mem_blk->online
2653 * - W: mem_blk->can_offline
2655 * In @mem_blk-to-system direction, the following @mem_blk fields are accessed:
2656 * - R: mem_blk->phys_index
2657 * - R: mem_blk->online
2658 *- R: mem_blk->can_offline
2659 * Written members remain unmodified on error.
2661 static void transfer_memory_block(GuestMemoryBlock
*mem_blk
, bool sys2memblk
,
2662 GuestMemoryBlockResponse
*result
,
2668 Error
*local_err
= NULL
;
2674 error_setg(errp
, "Internal error, 'result' should not be NULL");
2678 dp
= opendir("/sys/devices/system/memory/");
2679 /* if there is no 'memory' directory in sysfs,
2680 * we think this VM does not support online/offline memory block,
2681 * any other solution?
2684 if (errno
== ENOENT
) {
2686 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED
;
2693 dirpath
= g_strdup_printf("/sys/devices/system/memory/memory%" PRId64
"/",
2694 mem_blk
->phys_index
);
2695 dirfd
= open(dirpath
, O_RDONLY
| O_DIRECTORY
);
2698 error_setg_errno(errp
, errno
, "open(\"%s\")", dirpath
);
2700 if (errno
== ENOENT
) {
2701 result
->response
= GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND
;
2704 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED
;
2712 status
= g_malloc0(10);
2713 ga_read_sysfs_file(dirfd
, "state", status
, 10, &local_err
);
2715 /* treat with sysfs file that not exist in old kernel */
2716 if (errno
== ENOENT
) {
2717 error_free(local_err
);
2719 mem_blk
->online
= true;
2720 mem_blk
->can_offline
= false;
2721 } else if (!mem_blk
->online
) {
2723 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED
;
2727 error_propagate(errp
, local_err
);
2729 error_free(local_err
);
2731 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED
;
2738 char removable
= '0';
2740 mem_blk
->online
= (strncmp(status
, "online", 6) == 0);
2742 ga_read_sysfs_file(dirfd
, "removable", &removable
, 1, &local_err
);
2744 /* if no 'removable' file, it doesn't support offline mem blk */
2745 if (errno
== ENOENT
) {
2746 error_free(local_err
);
2747 mem_blk
->can_offline
= false;
2749 error_propagate(errp
, local_err
);
2752 mem_blk
->can_offline
= (removable
!= '0');
2755 if (mem_blk
->online
!= (strncmp(status
, "online", 6) == 0)) {
2756 const char *new_state
= mem_blk
->online
? "online" : "offline";
2758 ga_write_sysfs_file(dirfd
, "state", new_state
, strlen(new_state
),
2761 error_free(local_err
);
2763 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED
;
2767 result
->response
= GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS
;
2768 result
->has_error_code
= false;
2769 } /* otherwise pretend successful re-(on|off)-lining */
2780 result
->has_error_code
= true;
2781 result
->error_code
= errno
;
2785 GuestMemoryBlockList
*qmp_guest_get_memory_blocks(Error
**errp
)
2787 GuestMemoryBlockList
*head
, **tail
;
2788 Error
*local_err
= NULL
;
2795 dp
= opendir("/sys/devices/system/memory/");
2797 /* it's ok if this happens to be a system that doesn't expose
2798 * memory blocks via sysfs, but otherwise we should report
2801 if (errno
!= ENOENT
) {
2802 error_setg_errno(errp
, errno
, "Can't open directory"
2803 "\"/sys/devices/system/memory/\"");
2808 /* Note: the phys_index of memory block may be discontinuous,
2809 * this is because a memblk is the unit of the Sparse Memory design, which
2810 * allows discontinuous memory ranges (ex. NUMA), so here we should
2811 * traverse the memory block directory.
2813 while ((de
= readdir(dp
)) != NULL
) {
2814 GuestMemoryBlock
*mem_blk
;
2816 if ((strncmp(de
->d_name
, "memory", 6) != 0) ||
2817 !(de
->d_type
& DT_DIR
)) {
2821 mem_blk
= g_malloc0(sizeof *mem_blk
);
2822 /* The d_name is "memoryXXX", phys_index is block id, same as XXX */
2823 mem_blk
->phys_index
= strtoul(&de
->d_name
[6], NULL
, 10);
2824 mem_blk
->has_can_offline
= true; /* lolspeak ftw */
2825 transfer_memory_block(mem_blk
, true, NULL
, &local_err
);
2830 QAPI_LIST_APPEND(tail
, mem_blk
);
2834 if (local_err
== NULL
) {
2835 /* there's no guest with zero memory blocks */
2837 error_setg(errp
, "guest reported zero memory blocks!");
2842 qapi_free_GuestMemoryBlockList(head
);
2843 error_propagate(errp
, local_err
);
2847 GuestMemoryBlockResponseList
*
2848 qmp_guest_set_memory_blocks(GuestMemoryBlockList
*mem_blks
, Error
**errp
)
2850 GuestMemoryBlockResponseList
*head
, **tail
;
2851 Error
*local_err
= NULL
;
2856 while (mem_blks
!= NULL
) {
2857 GuestMemoryBlockResponse
*result
;
2858 GuestMemoryBlock
*current_mem_blk
= mem_blks
->value
;
2860 result
= g_malloc0(sizeof(*result
));
2861 result
->phys_index
= current_mem_blk
->phys_index
;
2862 transfer_memory_block(current_mem_blk
, false, result
, &local_err
);
2863 if (local_err
) { /* should never happen */
2867 QAPI_LIST_APPEND(tail
, result
);
2868 mem_blks
= mem_blks
->next
;
2873 qapi_free_GuestMemoryBlockResponseList(head
);
2874 error_propagate(errp
, local_err
);
2878 GuestMemoryBlockInfo
*qmp_guest_get_memory_block_info(Error
**errp
)
2880 Error
*local_err
= NULL
;
2884 GuestMemoryBlockInfo
*info
;
2886 dirpath
= g_strdup_printf("/sys/devices/system/memory/");
2887 dirfd
= open(dirpath
, O_RDONLY
| O_DIRECTORY
);
2889 error_setg_errno(errp
, errno
, "open(\"%s\")", dirpath
);
2895 buf
= g_malloc0(20);
2896 ga_read_sysfs_file(dirfd
, "block_size_bytes", buf
, 20, &local_err
);
2900 error_propagate(errp
, local_err
);
2904 info
= g_new0(GuestMemoryBlockInfo
, 1);
2905 info
->size
= strtol(buf
, NULL
, 16); /* the unit is bytes */
2912 #else /* defined(__linux__) */
2914 void qmp_guest_suspend_disk(Error
**errp
)
2916 error_setg(errp
, QERR_UNSUPPORTED
);
2919 void qmp_guest_suspend_ram(Error
**errp
)
2921 error_setg(errp
, QERR_UNSUPPORTED
);
2924 void qmp_guest_suspend_hybrid(Error
**errp
)
2926 error_setg(errp
, QERR_UNSUPPORTED
);
2929 GuestNetworkInterfaceList
*qmp_guest_network_get_interfaces(Error
**errp
)
2931 error_setg(errp
, QERR_UNSUPPORTED
);
2935 GuestLogicalProcessorList
*qmp_guest_get_vcpus(Error
**errp
)
2937 error_setg(errp
, QERR_UNSUPPORTED
);
2941 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList
*vcpus
, Error
**errp
)
2943 error_setg(errp
, QERR_UNSUPPORTED
);
2947 void qmp_guest_set_user_password(const char *username
,
2948 const char *password
,
2952 error_setg(errp
, QERR_UNSUPPORTED
);
2955 GuestMemoryBlockList
*qmp_guest_get_memory_blocks(Error
**errp
)
2957 error_setg(errp
, QERR_UNSUPPORTED
);
2961 GuestMemoryBlockResponseList
*
2962 qmp_guest_set_memory_blocks(GuestMemoryBlockList
*mem_blks
, Error
**errp
)
2964 error_setg(errp
, QERR_UNSUPPORTED
);
2968 GuestMemoryBlockInfo
*qmp_guest_get_memory_block_info(Error
**errp
)
2970 error_setg(errp
, QERR_UNSUPPORTED
);
2976 #if !defined(CONFIG_FSFREEZE)
2978 GuestFilesystemInfoList
*qmp_guest_get_fsinfo(Error
**errp
)
2980 error_setg(errp
, QERR_UNSUPPORTED
);
2984 GuestFsfreezeStatus
qmp_guest_fsfreeze_status(Error
**errp
)
2986 error_setg(errp
, QERR_UNSUPPORTED
);
2991 int64_t qmp_guest_fsfreeze_freeze(Error
**errp
)
2993 error_setg(errp
, QERR_UNSUPPORTED
);
2998 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints
,
2999 strList
*mountpoints
,
3002 error_setg(errp
, QERR_UNSUPPORTED
);
3007 int64_t qmp_guest_fsfreeze_thaw(Error
**errp
)
3009 error_setg(errp
, QERR_UNSUPPORTED
);
3014 GuestDiskInfoList
*qmp_guest_get_disks(Error
**errp
)
3016 error_setg(errp
, QERR_UNSUPPORTED
);
3020 #endif /* CONFIG_FSFREEZE */
3022 #if !defined(CONFIG_FSTRIM)
3023 GuestFilesystemTrimResponse
*
3024 qmp_guest_fstrim(bool has_minimum
, int64_t minimum
, Error
**errp
)
3026 error_setg(errp
, QERR_UNSUPPORTED
);
3031 /* add unsupported commands to the blacklist */
3032 GList
*ga_command_blacklist_init(GList
*blacklist
)
3034 #if !defined(__linux__)
3036 const char *list
[] = {
3037 "guest-suspend-disk", "guest-suspend-ram",
3038 "guest-suspend-hybrid", "guest-network-get-interfaces",
3039 "guest-get-vcpus", "guest-set-vcpus",
3040 "guest-get-memory-blocks", "guest-set-memory-blocks",
3041 "guest-get-memory-block-size", "guest-get-memory-block-info",
3043 char **p
= (char **)list
;
3046 blacklist
= g_list_append(blacklist
, g_strdup(*p
++));
3051 #if !defined(CONFIG_FSFREEZE)
3053 const char *list
[] = {
3054 "guest-get-fsinfo", "guest-fsfreeze-status",
3055 "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list",
3056 "guest-fsfreeze-thaw", "guest-get-fsinfo",
3057 "guest-get-disks", NULL
};
3058 char **p
= (char **)list
;
3061 blacklist
= g_list_append(blacklist
, g_strdup(*p
++));
3066 #if !defined(CONFIG_FSTRIM)
3067 blacklist
= g_list_append(blacklist
, g_strdup("guest-fstrim"));
3070 blacklist
= g_list_append(blacklist
, g_strdup("guest-get-devices"));
3075 /* register init/cleanup routines for stateful command groups */
3076 void ga_command_state_init(GAState
*s
, GACommandState
*cs
)
3078 #if defined(CONFIG_FSFREEZE)
3079 ga_command_state_add(cs
, NULL
, guest_fsfreeze_cleanup
);
3085 #define QGA_MICRO_SECOND_TO_SECOND 1000000
3087 static double ga_get_login_time(struct utmpx
*user_info
)
3089 double seconds
= (double)user_info
->ut_tv
.tv_sec
;
3090 double useconds
= (double)user_info
->ut_tv
.tv_usec
;
3091 useconds
/= QGA_MICRO_SECOND_TO_SECOND
;
3092 return seconds
+ useconds
;
3095 GuestUserList
*qmp_guest_get_users(Error
**errp
)
3097 GHashTable
*cache
= NULL
;
3098 GuestUserList
*head
= NULL
, **tail
= &head
;
3099 struct utmpx
*user_info
= NULL
;
3100 gpointer value
= NULL
;
3101 GuestUser
*user
= NULL
;
3102 double login_time
= 0;
3104 cache
= g_hash_table_new(g_str_hash
, g_str_equal
);
3108 user_info
= getutxent();
3109 if (user_info
== NULL
) {
3111 } else if (user_info
->ut_type
!= USER_PROCESS
) {
3113 } else if (g_hash_table_contains(cache
, user_info
->ut_user
)) {
3114 value
= g_hash_table_lookup(cache
, user_info
->ut_user
);
3115 user
= (GuestUser
*)value
;
3116 login_time
= ga_get_login_time(user_info
);
3117 /* We're ensuring the earliest login time to be sent */
3118 if (login_time
< user
->login_time
) {
3119 user
->login_time
= login_time
;
3124 user
= g_new0(GuestUser
, 1);
3125 user
->user
= g_strdup(user_info
->ut_user
);
3126 user
->login_time
= ga_get_login_time(user_info
);
3128 g_hash_table_insert(cache
, user
->user
, user
);
3130 QAPI_LIST_APPEND(tail
, user
);
3133 g_hash_table_destroy(cache
);
3139 GuestUserList
*qmp_guest_get_users(Error
**errp
)
3141 error_setg(errp
, QERR_UNSUPPORTED
);
3147 /* Replace escaped special characters with theire real values. The replacement
3148 * is done in place -- returned value is in the original string.
3150 static void ga_osrelease_replace_special(gchar
*value
)
3152 gchar
*p
, *p2
, quote
;
3154 /* Trim the string at first space or semicolon if it is not enclosed in
3155 * single or double quotes. */
3156 if ((value
[0] != '"') || (value
[0] == '\'')) {
3157 p
= strchr(value
, ' ');
3161 p
= strchr(value
, ';');
3182 /* Keep literal backslash followed by whatever is there */
3186 } else if (*p
== quote
) {
3194 static GKeyFile
*ga_parse_osrelease(const char *fname
)
3196 gchar
*content
= NULL
;
3197 gchar
*content2
= NULL
;
3199 GKeyFile
*keys
= g_key_file_new();
3200 const char *group
= "[os-release]\n";
3202 if (!g_file_get_contents(fname
, &content
, NULL
, &err
)) {
3203 slog("failed to read '%s', error: %s", fname
, err
->message
);
3207 if (!g_utf8_validate(content
, -1, NULL
)) {
3208 slog("file is not utf-8 encoded: %s", fname
);
3211 content2
= g_strdup_printf("%s%s", group
, content
);
3213 if (!g_key_file_load_from_data(keys
, content2
, -1, G_KEY_FILE_NONE
,
3215 slog("failed to parse file '%s', error: %s", fname
, err
->message
);
3227 g_key_file_free(keys
);
3231 GuestOSInfo
*qmp_guest_get_osinfo(Error
**errp
)
3233 GuestOSInfo
*info
= NULL
;
3234 struct utsname kinfo
;
3235 GKeyFile
*osrelease
= NULL
;
3236 const char *qga_os_release
= g_getenv("QGA_OS_RELEASE");
3238 info
= g_new0(GuestOSInfo
, 1);
3240 if (uname(&kinfo
) != 0) {
3241 error_setg_errno(errp
, errno
, "uname failed");
3243 info
->has_kernel_version
= true;
3244 info
->kernel_version
= g_strdup(kinfo
.version
);
3245 info
->has_kernel_release
= true;
3246 info
->kernel_release
= g_strdup(kinfo
.release
);
3247 info
->has_machine
= true;
3248 info
->machine
= g_strdup(kinfo
.machine
);
3251 if (qga_os_release
!= NULL
) {
3252 osrelease
= ga_parse_osrelease(qga_os_release
);
3254 osrelease
= ga_parse_osrelease("/etc/os-release");
3255 if (osrelease
== NULL
) {
3256 osrelease
= ga_parse_osrelease("/usr/lib/os-release");
3260 if (osrelease
!= NULL
) {
3263 #define GET_FIELD(field, osfield) do { \
3264 value = g_key_file_get_value(osrelease, "os-release", osfield, NULL); \
3265 if (value != NULL) { \
3266 ga_osrelease_replace_special(value); \
3267 info->has_ ## field = true; \
3268 info->field = value; \
3271 GET_FIELD(id
, "ID");
3272 GET_FIELD(name
, "NAME");
3273 GET_FIELD(pretty_name
, "PRETTY_NAME");
3274 GET_FIELD(version
, "VERSION");
3275 GET_FIELD(version_id
, "VERSION_ID");
3276 GET_FIELD(variant
, "VARIANT");
3277 GET_FIELD(variant_id
, "VARIANT_ID");
3280 g_key_file_free(osrelease
);
3286 GuestDeviceInfoList
*qmp_guest_get_devices(Error
**errp
)
3288 error_setg(errp
, QERR_UNSUPPORTED
);