2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public
4 * License v2 as published by the Free Software Foundation.
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
9 * General Public License for more details.
11 * You should have received a copy of the GNU General Public
12 * License along with this program; if not, write to the
13 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
14 * Boston, MA 021110-1307, USA.
22 #include <sys/ioctl.h>
27 #include "kerncompat.h"
32 #include "cmds-fi-usage.h"
36 static const char * const device_cmd_group_usage
[] = {
37 "btrfs device <command> [<args>]",
41 static const char * const cmd_device_add_usage
[] = {
42 "btrfs device add [options] <device> [<device>...] <path>",
43 "Add a device to a filesystem",
44 "-K|--nodiscard do not perform whole device TRIM",
45 "-f|--force force overwrite existing filesystem on the disk",
49 static int cmd_device_add(int argc
, char **argv
)
52 int i
, fdmnt
, ret
=0, e
;
53 DIR *dirstream
= NULL
;
59 static const struct option long_options
[] = {
60 { "nodiscard", optional_argument
, NULL
, 'K'},
61 { "force", no_argument
, NULL
, 'f'},
65 c
= getopt_long(argc
, argv
, "Kf", long_options
, NULL
);
76 usage(cmd_device_add_usage
);
82 if (check_argc_min(argc
, 2))
83 usage(cmd_device_add_usage
);
85 mntpnt
= argv
[optind
+ argc
- 1];
87 fdmnt
= btrfs_open_dir(mntpnt
, &dirstream
, 1);
91 for (i
= optind
; i
< optind
+ argc
- 1; i
++){
92 struct btrfs_ioctl_vol_args ioctl_args
;
94 u64 dev_block_count
= 0;
98 res
= test_dev_for_mkfs(argv
[i
], force
);
104 devfd
= open(argv
[i
], O_RDWR
);
106 fprintf(stderr
, "ERROR: Unable to open device '%s'\n", argv
[i
]);
111 res
= btrfs_prepare_device(devfd
, argv
[i
], 1, &dev_block_count
,
119 path
= canonicalize_path(argv
[i
]);
122 "ERROR: Could not canonicalize pathname '%s': %s\n",
123 argv
[i
], strerror(errno
));
128 memset(&ioctl_args
, 0, sizeof(ioctl_args
));
129 strncpy_null(ioctl_args
.name
, path
);
130 res
= ioctl(fdmnt
, BTRFS_IOC_ADD_DEV
, &ioctl_args
);
133 fprintf(stderr
, "ERROR: error adding the device '%s' - %s\n",
141 close_file_or_dir(fdmnt
, dirstream
);
142 btrfs_close_all_devices();
146 static int _cmd_device_remove(int argc
, char **argv
,
147 const char * const *usagestr
)
150 int i
, fdmnt
, ret
=0, e
;
151 DIR *dirstream
= NULL
;
153 if (check_argc_min(argc
, 3))
156 mntpnt
= argv
[argc
- 1];
158 fdmnt
= btrfs_open_dir(mntpnt
, &dirstream
, 1);
162 for(i
=1 ; i
< argc
- 1; i
++ ){
163 struct btrfs_ioctl_vol_args arg
;
166 if (!is_block_device(argv
[i
])) {
168 "ERROR: %s is not a block device\n", argv
[i
]);
172 memset(&arg
, 0, sizeof(arg
));
173 strncpy_null(arg
.name
, argv
[i
]);
174 res
= ioctl(fdmnt
, BTRFS_IOC_RM_DEV
, &arg
);
180 msg
= btrfs_err_str(res
);
184 "ERROR: error removing the device '%s' - %s\n",
190 close_file_or_dir(fdmnt
, dirstream
);
194 static const char * const cmd_device_remove_usage
[] = {
195 "btrfs device remove <device> [<device>...] <path>",
196 "Remove a device from a filesystem",
200 static int cmd_device_remove(int argc
, char **argv
)
202 return _cmd_device_remove(argc
, argv
, cmd_device_remove_usage
);
205 static const char * const cmd_device_delete_usage
[] = {
206 "btrfs device delete <device> [<device>...] <path>",
207 "Remove a device from a filesystem",
211 static int cmd_device_delete(int argc
, char **argv
)
213 return _cmd_device_remove(argc
, argv
, cmd_device_delete_usage
);
216 static const char * const cmd_device_scan_usage
[] = {
217 "btrfs device scan [(-d|--all-devices)|<device> [<device>...]]",
218 "Scan devices for a btrfs filesystem",
219 " -d|--all-devices (deprecated)",
223 static int cmd_device_scan(int argc
, char **argv
)
233 static const struct option long_options
[] = {
234 { "all-devices", no_argument
, NULL
, 'd'},
238 c
= getopt_long(argc
, argv
, "d", long_options
, NULL
);
246 usage(cmd_device_scan_usage
);
250 if (all
&& check_argc_max(argc
, 2))
251 usage(cmd_device_scan_usage
);
253 if (all
|| argc
== 1) {
254 printf("Scanning for Btrfs filesystems\n");
255 ret
= btrfs_scan_lblkid();
257 fprintf(stderr
, "ERROR: error %d while scanning\n", ret
);
258 ret
= btrfs_register_all_devices();
260 fprintf(stderr
, "ERROR: error %d while registering\n", ret
);
264 for( i
= devstart
; i
< argc
; i
++ ){
267 if (!is_block_device(argv
[i
])) {
269 "ERROR: %s is not a block device\n", argv
[i
]);
273 path
= canonicalize_path(argv
[i
]);
276 "ERROR: Could not canonicalize path '%s': %s\n",
277 argv
[i
], strerror(errno
));
281 printf("Scanning for Btrfs filesystems in '%s'\n", path
);
282 if (btrfs_register_one_device(path
) != 0) {
291 btrfs_close_all_devices();
295 static const char * const cmd_device_ready_usage
[] = {
296 "btrfs device ready <device>",
297 "Check device to see if it has all of its devices in cache for mounting",
301 static int cmd_device_ready(int argc
, char **argv
)
303 struct btrfs_ioctl_vol_args args
;
308 if (check_argc_min(argc
, 2))
309 usage(cmd_device_ready_usage
);
311 fd
= open("/dev/btrfs-control", O_RDWR
);
313 perror("failed to open /dev/btrfs-control");
317 path
= canonicalize_path(argv
[argc
- 1]);
320 "ERROR: Could not canonicalize pathname '%s': %s\n",
321 argv
[argc
- 1], strerror(errno
));
326 if (!is_block_device(path
)) {
328 "ERROR: %s is not a block device\n", path
);
333 memset(&args
, 0, sizeof(args
));
334 strncpy_null(args
.name
, path
);
335 ret
= ioctl(fd
, BTRFS_IOC_DEVICES_READY
, &args
);
337 fprintf(stderr
, "ERROR: unable to determine if the device '%s'"
338 " is ready for mounting - %s\n", path
,
349 static const char * const cmd_device_stats_usage
[] = {
350 "btrfs device stats [-z] <path>|<device>",
351 "Show current device IO stats.",
353 "-z show current stats and reset values to zero",
357 static int cmd_device_stats(int argc
, char **argv
)
360 struct btrfs_ioctl_fs_info_args fi_args
;
361 struct btrfs_ioctl_dev_info_args
*di_args
= NULL
;
368 DIR *dirstream
= NULL
;
371 while ((c
= getopt(argc
, argv
, "z")) != -1) {
374 flags
= BTRFS_DEV_STATS_RESET
;
378 usage(cmd_device_stats_usage
);
382 argc
= argc
- optind
;
383 if (check_argc_exact(argc
, 1))
384 usage(cmd_device_stats_usage
);
386 dev_path
= argv
[optind
];
388 fdmnt
= open_path_or_dev_mnt(dev_path
, &dirstream
);
393 "ERROR: '%s' is not a mounted btrfs device\n",
396 fprintf(stderr
, "ERROR: can't access '%s': %s\n",
397 dev_path
, strerror(errno
));
401 ret
= get_fs_info(dev_path
, &fi_args
, &di_args
);
403 fprintf(stderr
, "ERROR: getting dev info for devstats failed: "
404 "%s\n", strerror(-ret
));
408 if (!fi_args
.num_devices
) {
409 fprintf(stderr
, "ERROR: no devices found\n");
414 for (i
= 0; i
< fi_args
.num_devices
; i
++) {
415 struct btrfs_ioctl_get_dev_stats args
= {0};
416 __u8 path
[BTRFS_DEVICE_PATH_NAME_MAX
+ 1];
418 strncpy((char *)path
, (char *)di_args
[i
].path
,
419 BTRFS_DEVICE_PATH_NAME_MAX
);
420 path
[BTRFS_DEVICE_PATH_NAME_MAX
] = '\0';
422 args
.devid
= di_args
[i
].devid
;
423 args
.nr_items
= BTRFS_DEV_STAT_VALUES_MAX
;
426 if (ioctl(fdmnt
, BTRFS_IOC_GET_DEV_STATS
, &args
) < 0) {
428 "ERROR: ioctl(BTRFS_IOC_GET_DEV_STATS) on %s failed: %s\n",
429 path
, strerror(errno
));
432 char *canonical_path
;
434 canonical_path
= canonicalize_path((char *)path
);
436 if (args
.nr_items
>= BTRFS_DEV_STAT_WRITE_ERRS
+ 1)
437 printf("[%s].write_io_errs %llu\n",
439 (unsigned long long) args
.values
[
440 BTRFS_DEV_STAT_WRITE_ERRS
]);
441 if (args
.nr_items
>= BTRFS_DEV_STAT_READ_ERRS
+ 1)
442 printf("[%s].read_io_errs %llu\n",
444 (unsigned long long) args
.values
[
445 BTRFS_DEV_STAT_READ_ERRS
]);
446 if (args
.nr_items
>= BTRFS_DEV_STAT_FLUSH_ERRS
+ 1)
447 printf("[%s].flush_io_errs %llu\n",
449 (unsigned long long) args
.values
[
450 BTRFS_DEV_STAT_FLUSH_ERRS
]);
451 if (args
.nr_items
>= BTRFS_DEV_STAT_CORRUPTION_ERRS
+ 1)
452 printf("[%s].corruption_errs %llu\n",
454 (unsigned long long) args
.values
[
455 BTRFS_DEV_STAT_CORRUPTION_ERRS
]);
456 if (args
.nr_items
>= BTRFS_DEV_STAT_GENERATION_ERRS
+ 1)
457 printf("[%s].generation_errs %llu\n",
459 (unsigned long long) args
.values
[
460 BTRFS_DEV_STAT_GENERATION_ERRS
]);
462 free(canonical_path
);
468 close_file_or_dir(fdmnt
, dirstream
);
469 btrfs_close_all_devices();
474 const char * const cmd_device_usage_usage
[] = {
475 "btrfs device usage [options] <path> [<path>..]",
476 "Show detailed information about internal allocations in devices.",
477 HELPINFO_OUTPUT_UNIT_DF
,
481 static int _cmd_device_usage(int fd
, char *path
, unsigned unit_mode
)
485 struct chunk_info
*chunkinfo
= NULL
;
486 struct device_info
*devinfo
= NULL
;
490 ret
= load_chunk_and_device_info(fd
, &chunkinfo
, &chunkcount
, &devinfo
,
495 for (i
= 0; i
< devcount
; i
++) {
496 printf("%s, ID: %llu\n", devinfo
[i
].path
, devinfo
[i
].devid
);
497 print_device_sizes(fd
, &devinfo
[i
], unit_mode
);
498 print_device_chunks(fd
, &devinfo
[i
], chunkinfo
, chunkcount
,
510 int cmd_device_usage(int argc
, char **argv
)
514 int more_than_one
= 0;
517 unit_mode
= get_unit_mode_from_arg(&argc
, argv
, 1);
519 if (check_argc_min(argc
, 2) || argv
[1][0] == '-')
520 usage(cmd_device_usage_usage
);
522 for (i
= 1; i
< argc
; i
++) {
524 DIR *dirstream
= NULL
;
529 fd
= btrfs_open_dir(argv
[i
], &dirstream
, 1);
535 ret
= _cmd_device_usage(fd
, argv
[i
], unit_mode
);
536 close_file_or_dir(fd
, dirstream
);
546 static const char device_cmd_group_info
[] =
547 "manage and query devices in the filesystem";
549 const struct cmd_group device_cmd_group
= {
550 device_cmd_group_usage
, device_cmd_group_info
, {
551 { "add", cmd_device_add
, cmd_device_add_usage
, NULL
, 0 },
552 { "delete", cmd_device_delete
, cmd_device_delete_usage
, NULL
,
554 { "remove", cmd_device_remove
, cmd_device_remove_usage
, NULL
, 0 },
555 { "scan", cmd_device_scan
, cmd_device_scan_usage
, NULL
, 0 },
556 { "ready", cmd_device_ready
, cmd_device_ready_usage
, NULL
, 0 },
557 { "stats", cmd_device_stats
, cmd_device_stats_usage
, NULL
, 0 },
558 { "usage", cmd_device_usage
,
559 cmd_device_usage_usage
, NULL
, 0 },
564 int cmd_device(int argc
, char **argv
)
566 return handle_command_group(&device_cmd_group
, argc
, argv
);