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;
53 DIR *dirstream = NULL;
60 static const struct option long_options[] = {
61 { "nodiscard", optional_argument, NULL, 'K'},
62 { "force", no_argument, NULL, 'f'},
66 c = getopt_long(argc, argv, "Kf", long_options, NULL);
77 usage(cmd_device_add_usage);
81 if (check_argc_min(argc - optind, 2))
82 usage(cmd_device_add_usage);
85 mntpnt = argv[last_dev];
87 fdmnt = btrfs_open_dir(mntpnt, &dirstream, 1);
91 for (i = optind; i < last_dev; i++){
92 struct btrfs_ioctl_vol_args ioctl_args;
94 u64 dev_block_count = 0;
97 res = test_dev_for_mkfs(argv[i], force);
103 devfd = open(argv[i], O_RDWR);
105 error("unable to open device '%s'", argv[i]);
110 res = btrfs_prepare_device(devfd, argv[i], 1, &dev_block_count,
118 path = canonicalize_path(argv[i]);
120 error("could not canonicalize pathname '%s': %s",
121 argv[i], strerror(errno));
126 memset(&ioctl_args, 0, sizeof(ioctl_args));
127 strncpy_null(ioctl_args.name, path);
128 res = ioctl(fdmnt, BTRFS_IOC_ADD_DEV, &ioctl_args);
130 error("error adding device '%s': %s",
131 path, strerror(errno));
138 close_file_or_dir(fdmnt, dirstream);
142 static int _cmd_device_remove(int argc, char **argv,
143 const char * const *usagestr)
146 int i, fdmnt, ret = 0;
147 DIR *dirstream = NULL;
149 if (check_argc_min(argc, 3))
152 mntpnt = argv[argc - 1];
154 fdmnt = btrfs_open_dir(mntpnt, &dirstream, 1);
158 for(i=1 ; i < argc - 1; i++ ){
159 struct btrfs_ioctl_vol_args arg;
162 if (is_block_device(argv[i]) != 1 && strcmp(argv[i], "missing")) {
163 error("not a block device: %s", argv[i]);
167 memset(&arg, 0, sizeof(arg));
168 strncpy_null(arg.name, argv[i]);
170 * Positive values are from BTRFS_ERROR_DEV_*,
171 * otherwise it's a generic error, one of errnos
173 res = ioctl(fdmnt, BTRFS_IOC_RM_DEV, &arg);
178 msg = btrfs_err_str(res);
180 msg = strerror(errno);
181 error("error removing device '%s': %s",
187 close_file_or_dir(fdmnt, dirstream);
191 static const char * const cmd_device_remove_usage[] = {
192 "btrfs device remove <device> [<device>...] <path>",
193 "Remove a device from a filesystem",
197 static int cmd_device_remove(int argc, char **argv)
199 return _cmd_device_remove(argc, argv, cmd_device_remove_usage);
202 static const char * const cmd_device_delete_usage[] = {
203 "btrfs device delete <device> [<device>...] <path>",
204 "Remove a device from a filesystem",
208 static int cmd_device_delete(int argc, char **argv)
210 return _cmd_device_remove(argc, argv, cmd_device_delete_usage);
213 static const char * const cmd_device_scan_usage[] = {
214 "btrfs device scan [(-d|--all-devices)|<device> [<device>...]]",
215 "Scan devices for a btrfs filesystem",
216 " -d|--all-devices (deprecated)",
220 static int cmd_device_scan(int argc, char **argv)
230 static const struct option long_options[] = {
231 { "all-devices", no_argument, NULL, 'd'},
235 c = getopt_long(argc, argv, "d", long_options, NULL);
243 usage(cmd_device_scan_usage);
247 if (all && check_argc_max(argc, 2))
248 usage(cmd_device_scan_usage);
250 if (all || argc == 1) {
251 printf("Scanning for Btrfs filesystems\n");
252 ret = btrfs_scan_lblkid();
253 error_on(ret, "error %d while scanning", ret);
254 ret = btrfs_register_all_devices();
255 error_on(ret, "error %d while registering devices", ret);
259 for( i = devstart ; i < argc ; i++ ){
262 if (is_block_device(argv[i]) != 1) {
263 error("not a block device: %s", argv[i]);
267 path = canonicalize_path(argv[i]);
269 error("could not canonicalize path '%s': %s",
270 argv[i], strerror(errno));
274 printf("Scanning for Btrfs filesystems in '%s'\n", path);
275 if (btrfs_register_one_device(path) != 0) {
287 static const char * const cmd_device_ready_usage[] = {
288 "btrfs device ready <device>",
289 "Check device to see if it has all of its devices in cache for mounting",
293 static int cmd_device_ready(int argc, char **argv)
295 struct btrfs_ioctl_vol_args args;
300 if (check_argc_min(argc, 2))
301 usage(cmd_device_ready_usage);
303 fd = open("/dev/btrfs-control", O_RDWR);
305 perror("failed to open /dev/btrfs-control");
309 path = canonicalize_path(argv[argc - 1]);
311 error("could not canonicalize pathname '%s': %s",
312 argv[argc - 1], strerror(errno));
317 if (is_block_device(path) != 1) {
318 error("not a block device: %s", path);
323 memset(&args, 0, sizeof(args));
324 strncpy_null(args.name, path);
325 ret = ioctl(fd, BTRFS_IOC_DEVICES_READY, &args);
327 error("unable to determine if device '%s' is ready for mount: %s",
328 path, strerror(errno));
338 static const char * const cmd_device_stats_usage[] = {
339 "btrfs device stats [-z] <path>|<device>",
340 "Show current device IO stats.",
342 "-z show current stats and reset values to zero",
346 static int cmd_device_stats(int argc, char **argv)
349 struct btrfs_ioctl_fs_info_args fi_args;
350 struct btrfs_ioctl_dev_info_args *di_args = NULL;
357 DIR *dirstream = NULL;
360 while ((c = getopt(argc, argv, "z")) != -1) {
363 flags = BTRFS_DEV_STATS_RESET;
367 usage(cmd_device_stats_usage);
371 argc = argc - optind;
372 if (check_argc_exact(argc, 1))
373 usage(cmd_device_stats_usage);
375 dev_path = argv[optind];
377 fdmnt = open_path_or_dev_mnt(dev_path, &dirstream, 1);
381 ret = get_fs_info(dev_path, &fi_args, &di_args);
383 error("getting dev info for devstats failed: %s",
388 if (!fi_args.num_devices) {
389 error("no devices found");
394 for (i = 0; i < fi_args.num_devices; i++) {
395 struct btrfs_ioctl_get_dev_stats args = {0};
396 __u8 path[BTRFS_DEVICE_PATH_NAME_MAX + 1];
398 strncpy((char *)path, (char *)di_args[i].path,
399 BTRFS_DEVICE_PATH_NAME_MAX);
400 path[BTRFS_DEVICE_PATH_NAME_MAX] = '\0';
402 args.devid = di_args[i].devid;
403 args.nr_items = BTRFS_DEV_STAT_VALUES_MAX;
406 if (ioctl(fdmnt, BTRFS_IOC_GET_DEV_STATS, &args) < 0) {
407 error("DEV_STATS ioctl failed on %s: %s",
408 path, strerror(errno));
411 char *canonical_path;
413 canonical_path = canonicalize_path((char *)path);
415 if (args.nr_items >= BTRFS_DEV_STAT_WRITE_ERRS + 1)
416 printf("[%s].write_io_errs %llu\n",
418 (unsigned long long) args.values[
419 BTRFS_DEV_STAT_WRITE_ERRS]);
420 if (args.nr_items >= BTRFS_DEV_STAT_READ_ERRS + 1)
421 printf("[%s].read_io_errs %llu\n",
423 (unsigned long long) args.values[
424 BTRFS_DEV_STAT_READ_ERRS]);
425 if (args.nr_items >= BTRFS_DEV_STAT_FLUSH_ERRS + 1)
426 printf("[%s].flush_io_errs %llu\n",
428 (unsigned long long) args.values[
429 BTRFS_DEV_STAT_FLUSH_ERRS]);
430 if (args.nr_items >= BTRFS_DEV_STAT_CORRUPTION_ERRS + 1)
431 printf("[%s].corruption_errs %llu\n",
433 (unsigned long long) args.values[
434 BTRFS_DEV_STAT_CORRUPTION_ERRS]);
435 if (args.nr_items >= BTRFS_DEV_STAT_GENERATION_ERRS + 1)
436 printf("[%s].generation_errs %llu\n",
438 (unsigned long long) args.values[
439 BTRFS_DEV_STAT_GENERATION_ERRS]);
441 free(canonical_path);
447 close_file_or_dir(fdmnt, dirstream);
452 static const char * const cmd_device_usage_usage[] = {
453 "btrfs device usage [options] <path> [<path>..]",
454 "Show detailed information about internal allocations in devices.",
455 HELPINFO_UNITS_SHORT_LONG,
459 static int _cmd_device_usage(int fd, char *path, unsigned unit_mode)
463 struct chunk_info *chunkinfo = NULL;
464 struct device_info *devinfo = NULL;
468 ret = load_chunk_and_device_info(fd, &chunkinfo, &chunkcount, &devinfo,
473 for (i = 0; i < devcount; i++) {
474 printf("%s, ID: %llu\n", devinfo[i].path, devinfo[i].devid);
475 print_device_sizes(fd, &devinfo[i], unit_mode);
476 print_device_chunks(fd, &devinfo[i], chunkinfo, chunkcount,
488 static int cmd_device_usage(int argc, char **argv)
494 unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
496 if (check_argc_min(argc, 2) || argv[1][0] == '-')
497 usage(cmd_device_usage_usage);
499 for (i = 1; i < argc; i++) {
501 DIR *dirstream = NULL;
506 fd = btrfs_open_dir(argv[i], &dirstream, 1);
512 ret = _cmd_device_usage(fd, argv[i], unit_mode);
513 close_file_or_dir(fd, dirstream);
522 static const char device_cmd_group_info[] =
523 "manage and query devices in the filesystem";
525 const struct cmd_group device_cmd_group = {
526 device_cmd_group_usage, device_cmd_group_info, {
527 { "add", cmd_device_add, cmd_device_add_usage, NULL, 0 },
528 { "delete", cmd_device_delete, cmd_device_delete_usage, NULL,
530 { "remove", cmd_device_remove, cmd_device_remove_usage, NULL, 0 },
531 { "scan", cmd_device_scan, cmd_device_scan_usage, NULL, 0 },
532 { "ready", cmd_device_ready, cmd_device_ready_usage, NULL, 0 },
533 { "stats", cmd_device_stats, cmd_device_stats_usage, NULL, 0 },
534 { "usage", cmd_device_usage,
535 cmd_device_usage_usage, NULL, 0 },
540 int cmd_device(int argc, char **argv)
542 return handle_command_group(&device_cmd_group, argc, argv);