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.
17 #define _XOPEN_SOURCE 500
22 #include <sys/ioctl.h>
24 #include <uuid/uuid.h>
29 #include <linux/limits.h>
32 #include "kerncompat.h"
39 #include "list_sort.h"
44 * for btrfs fi show, we maintain a hash of fsids we've already printed.
45 * This way we don't print dups if a given FS is mounted more than once.
47 #define SEEN_FSID_HASH_SIZE 256
50 u8 fsid[BTRFS_FSID_SIZE];
51 struct seen_fsid *next;
54 static struct seen_fsid *seen_fsid_hash[SEEN_FSID_HASH_SIZE] = {NULL,};
56 static int is_seen_fsid(u8 *fsid)
59 int slot = hash % SEEN_FSID_HASH_SIZE;
60 struct seen_fsid *seen = seen_fsid_hash[slot];
65 static int add_seen_fsid(u8 *fsid)
68 int slot = hash % SEEN_FSID_HASH_SIZE;
69 struct seen_fsid *seen = seen_fsid_hash[slot];
70 struct seen_fsid *alloc;
76 if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0)
87 alloc = malloc(sizeof(*alloc));
92 memcpy(alloc->fsid, fsid, BTRFS_FSID_SIZE);
97 seen_fsid_hash[slot] = alloc;
102 static void free_seen_fsid(void)
105 struct seen_fsid *seen;
106 struct seen_fsid *next;
108 for (slot = 0; slot < SEEN_FSID_HASH_SIZE; slot++) {
109 seen = seen_fsid_hash[slot];
115 seen_fsid_hash[slot] = NULL;
119 static const char * const filesystem_cmd_group_usage[] = {
120 "btrfs filesystem [<group>] <command> [<args>]",
124 static const char * const cmd_df_usage[] = {
125 "btrfs filesystem df [options] <path>",
126 "Show space usage information for a mount point",
127 "-b|--raw raw numbers in bytes",
128 "-h human friendly numbers, base 1024 (default)",
129 "-H human friendly numbers, base 1000",
130 "--iec use 1024 as a base (KiB, MiB, GiB, TiB)",
131 "--si use 1000 as a base (kB, MB, GB, TB)",
132 "-k|--kbytes show sizes in KiB, or kB with --si",
133 "-m|--mbytes show sizes in MiB, or MB with --si",
134 "-g|--gbytes show sizes in GiB, or GB with --si",
135 "-t|--tbytes show sizes in TiB, or TB with --si",
139 static int get_df(int fd, struct btrfs_ioctl_space_args **sargs_ret)
143 struct btrfs_ioctl_space_args *sargs;
145 sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
149 sargs->space_slots = 0;
150 sargs->total_spaces = 0;
152 ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
155 fprintf(stderr, "ERROR: couldn't get space info - %s\n",
160 /* This really should never happen */
161 if (!sargs->total_spaces) {
165 count = sargs->total_spaces;
168 sargs = malloc(sizeof(struct btrfs_ioctl_space_args) +
169 (count * sizeof(struct btrfs_ioctl_space_info)));
173 sargs->space_slots = count;
174 sargs->total_spaces = 0;
175 ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
178 fprintf(stderr, "ERROR: get space info count %llu - %s\n",
187 static void print_df(struct btrfs_ioctl_space_args *sargs, unsigned unit_mode)
190 struct btrfs_ioctl_space_info *sp = sargs->spaces;
192 for (i = 0; i < sargs->total_spaces; i++, sp++) {
193 printf("%s, %s: total=%s, used=%s\n",
194 btrfs_group_type_str(sp->flags),
195 btrfs_group_profile_str(sp->flags),
196 pretty_size_mode(sp->total_bytes, unit_mode),
197 pretty_size_mode(sp->used_bytes, unit_mode));
201 static int cmd_df(int argc, char **argv)
203 struct btrfs_ioctl_space_args *sargs = NULL;
207 DIR *dirstream = NULL;
208 unsigned unit_mode = UNITS_DEFAULT;
212 static const struct option long_options[] = {
213 { "raw", no_argument, NULL, 'b'},
214 { "kbytes", no_argument, NULL, 'k'},
215 { "mbytes", no_argument, NULL, 'm'},
216 { "gbytes", no_argument, NULL, 'g'},
217 { "tbytes", no_argument, NULL, 't'},
218 { "si", no_argument, NULL, 256},
219 { "iec", no_argument, NULL, 257},
221 int c = getopt_long(argc, argv, "bhHkmgt", long_options,
227 unit_mode = UNITS_RAW;
230 units_set_base(&unit_mode, UNITS_KBYTES);
233 units_set_base(&unit_mode, UNITS_MBYTES);
236 units_set_base(&unit_mode, UNITS_GBYTES);
239 units_set_base(&unit_mode, UNITS_TBYTES);
242 unit_mode = UNITS_HUMAN_BINARY;
245 unit_mode = UNITS_HUMAN_DECIMAL;
248 units_set_mode(&unit_mode, UNITS_DECIMAL);
251 units_set_mode(&unit_mode, UNITS_BINARY);
258 if (check_argc_exact(argc, optind + 1))
263 fd = open_file_or_dir(path, &dirstream);
265 fprintf(stderr, "ERROR: can't access '%s'\n", path);
268 ret = get_df(fd, &sargs);
271 print_df(sargs, unit_mode);
274 fprintf(stderr, "ERROR: get_df failed %s\n", strerror(-ret));
277 close_file_or_dir(fd, dirstream);
281 static int match_search_item_kernel(__u8 *fsid, char *mnt, char *label,
284 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
285 int search_len = strlen(search);
287 search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
288 uuid_unparse(fsid, uuidbuf);
289 if (!strncmp(uuidbuf, search, search_len))
292 if (strlen(label) && strcmp(label, search) == 0)
295 if (strcmp(mnt, search) == 0)
301 static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
303 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
304 struct list_head *cur;
305 struct btrfs_device *device;
306 int search_len = strlen(search);
308 search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
309 uuid_unparse(fs_devices->fsid, uuidbuf);
310 if (!strncmp(uuidbuf, search, search_len))
313 list_for_each(cur, &fs_devices->devices) {
314 device = list_entry(cur, struct btrfs_device, dev_list);
315 if ((device->label && strcmp(device->label, search) == 0) ||
316 strcmp(device->name, search) == 0)
323 * Sort devices by devid, ascending
325 static int cmp_device_id(void *priv, struct list_head *a,
328 const struct btrfs_device *da = list_entry(a, struct btrfs_device,
330 const struct btrfs_device *db = list_entry(b, struct btrfs_device,
333 return da->devid < db->devid ? -1 :
334 da->devid > db->devid ? 1 : 0;
337 static void splice_device_list(struct list_head *seed_devices,
338 struct list_head *all_devices)
340 struct btrfs_device *in_all, *next_all;
341 struct btrfs_device *in_seed, *next_seed;
343 list_for_each_entry_safe(in_all, next_all, all_devices, dev_list) {
344 list_for_each_entry_safe(in_seed, next_seed, seed_devices,
346 if (in_all->devid == in_seed->devid) {
348 * When do dev replace in a sprout fs
349 * to a dev in its seed fs, the replacing
350 * dev will reside in the sprout fs and
351 * the replaced dev will still exist
353 * So pick the latest one when showing
356 if (in_all->generation
357 < in_seed->generation) {
358 list_del(&in_all->dev_list);
360 } else if (in_all->generation
361 > in_seed->generation) {
362 list_del(&in_seed->dev_list);
370 list_splice(seed_devices, all_devices);
373 static void print_devices(struct btrfs_fs_devices *fs_devices,
376 struct btrfs_device *device;
377 struct btrfs_fs_devices *cur_fs;
378 struct list_head *all_devices;
380 all_devices = &fs_devices->devices;
381 cur_fs = fs_devices->seed;
382 /* add all devices of seed fs to the fs to be printed */
384 splice_device_list(&cur_fs->devices, all_devices);
385 cur_fs = cur_fs->seed;
388 list_sort(NULL, all_devices, cmp_device_id);
389 list_for_each_entry(device, all_devices, dev_list) {
390 printf("\tdevid %4llu size %s used %s path %s\n",
391 (unsigned long long)device->devid,
392 pretty_size(device->total_bytes),
393 pretty_size(device->bytes_used), device->name);
399 static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
401 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
402 struct btrfs_device *device;
406 if (add_seen_fsid(fs_devices->fsid))
409 uuid_unparse(fs_devices->fsid, uuidbuf);
410 device = list_entry(fs_devices->devices.next, struct btrfs_device,
412 if (device->label && device->label[0])
413 printf("Label: '%s' ", device->label);
415 printf("Label: none ");
417 total = device->total_devs;
418 printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
419 (unsigned long long)total,
420 pretty_size(device->super_bytes_used));
422 print_devices(fs_devices, &devs_found);
424 if (devs_found < total) {
425 printf("\t*** Some devices missing\n");
430 /* adds up all the used spaces as reported by the space info ioctl
432 static u64 calc_used_bytes(struct btrfs_ioctl_space_args *si)
436 for (i = 0; i < si->total_spaces; i++)
437 ret += si->spaces[i].used_bytes;
441 static int print_one_fs(struct btrfs_ioctl_fs_info_args *fs_info,
442 struct btrfs_ioctl_dev_info_args *dev_info,
443 struct btrfs_ioctl_space_args *space_info,
444 char *label, char *path)
449 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
450 struct btrfs_ioctl_dev_info_args *tmp_dev_info;
453 ret = add_seen_fsid(fs_info->fsid);
459 uuid_unparse(fs_info->fsid, uuidbuf);
460 if (label && strlen(label))
461 printf("Label: '%s' ", label);
463 printf("Label: none ");
465 printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
466 fs_info->num_devices,
467 pretty_size(calc_used_bytes(space_info)));
469 for (i = 0; i < fs_info->num_devices; i++) {
470 char *canonical_path;
472 tmp_dev_info = (struct btrfs_ioctl_dev_info_args *)&dev_info[i];
473 canonical_path = canonicalize_path((char *)tmp_dev_info->path);
475 /* Add check for missing devices even mounted */
476 fd = open((char *)tmp_dev_info->path, O_RDONLY);
482 printf("\tdevid %4llu size %s used %s path %s\n",
484 pretty_size(tmp_dev_info->total_bytes),
485 pretty_size(tmp_dev_info->bytes_used),
488 free(canonical_path);
492 printf("\t*** Some devices missing\n");
497 /* This function checks if the given input parameter is
499 * return -1: some error in the given input
500 * return 0: unknow input
501 * return 1: given input is uuid
502 * return 2: given input is path
504 static int check_arg_type(char *input)
512 if (realpath(input, path)) {
513 if (is_block_device(path) == 1)
514 return BTRFS_ARG_BLKDEV;
516 if (is_mount_point(path) == 1)
517 return BTRFS_ARG_MNTPOINT;
519 return BTRFS_ARG_UNKNOWN;
522 if (strlen(input) == (BTRFS_UUID_UNPARSED_SIZE - 1) &&
523 !uuid_parse(input, out))
524 return BTRFS_ARG_UUID;
526 return BTRFS_ARG_UNKNOWN;
529 static int btrfs_scan_kernel(void *search)
535 struct btrfs_ioctl_fs_info_args fs_info_arg;
536 struct btrfs_ioctl_dev_info_args *dev_info_arg = NULL;
537 struct btrfs_ioctl_space_args *space_info_arg = NULL;
538 char label[BTRFS_LABEL_SIZE];
540 f = setmntent("/proc/self/mounts", "r");
544 memset(label, 0, sizeof(label));
545 while ((mnt = getmntent(f)) != NULL) {
546 if (strcmp(mnt->mnt_type, "btrfs"))
548 ret = get_fs_info(mnt->mnt_dir, &fs_info_arg,
553 if (get_label_mounted(mnt->mnt_dir, label)) {
557 if (search && !match_search_item_kernel(fs_info_arg.fsid,
558 mnt->mnt_dir, label, search)) {
563 fd = open(mnt->mnt_dir, O_RDONLY);
564 if ((fd != -1) && !get_df(fd, &space_info_arg)) {
565 print_one_fs(&fs_info_arg, dev_info_arg,
566 space_info_arg, label, mnt->mnt_dir);
567 kfree(space_info_arg);
568 memset(label, 0, sizeof(label));
581 static int dev_to_fsid(char *dev, __u8 *fsid)
583 struct btrfs_super_block *disk_super;
592 fd = open(dev, O_RDONLY);
599 disk_super = (struct btrfs_super_block *)buf;
600 ret = btrfs_read_dev_super(fd, disk_super,
601 BTRFS_SUPER_INFO_OFFSET, 0);
605 memcpy(fsid, disk_super->fsid, BTRFS_FSID_SIZE);
614 static void free_fs_devices(struct btrfs_fs_devices *fs_devices)
616 struct btrfs_fs_devices *cur_seed, *next_seed;
617 struct btrfs_device *device;
619 while (!list_empty(&fs_devices->devices)) {
620 device = list_entry(fs_devices->devices.next,
621 struct btrfs_device, dev_list);
622 list_del(&device->dev_list);
629 /* free seed fs chain */
630 cur_seed = fs_devices->seed;
631 fs_devices->seed = NULL;
633 next_seed = cur_seed->seed;
636 cur_seed = next_seed;
639 list_del(&fs_devices->list);
643 static int copy_device(struct btrfs_device *dst,
644 struct btrfs_device *src)
646 dst->devid = src->devid;
647 memcpy(dst->uuid, src->uuid, BTRFS_UUID_SIZE);
648 if (src->name == NULL)
651 dst->name = strdup(src->name);
655 if (src->label == NULL)
658 dst->label = strdup(src->label);
664 dst->total_devs = src->total_devs;
665 dst->super_bytes_used = src->super_bytes_used;
666 dst->total_bytes = src->total_bytes;
667 dst->bytes_used = src->bytes_used;
668 dst->generation = src->generation;
673 static int copy_fs_devices(struct btrfs_fs_devices *dst,
674 struct btrfs_fs_devices *src)
676 struct btrfs_device *cur_dev, *dev_copy;
679 memcpy(dst->fsid, src->fsid, BTRFS_FSID_SIZE);
680 INIT_LIST_HEAD(&dst->devices);
683 list_for_each_entry(cur_dev, &src->devices, dev_list) {
684 dev_copy = malloc(sizeof(*dev_copy));
690 ret = copy_device(dev_copy, cur_dev);
696 list_add(&dev_copy->dev_list, &dst->devices);
697 dev_copy->fs_devices = dst;
703 static int find_and_copy_seed(struct btrfs_fs_devices *seed,
704 struct btrfs_fs_devices *copy,
705 struct list_head *fs_uuids) {
706 struct btrfs_fs_devices *cur_fs;
708 list_for_each_entry(cur_fs, fs_uuids, list)
709 if (!memcmp(seed->fsid, cur_fs->fsid, BTRFS_FSID_SIZE))
710 return copy_fs_devices(copy, cur_fs);
715 static int map_seed_devices(struct list_head *all_uuids,
716 char *search, int *found)
718 struct btrfs_fs_devices *cur_fs, *cur_seed;
719 struct btrfs_fs_devices *fs_copy, *seed_copy;
720 struct btrfs_fs_devices *opened_fs;
721 struct btrfs_device *device;
722 struct btrfs_fs_info *fs_info;
723 struct list_head *fs_uuids;
726 fs_uuids = btrfs_scanned_uuids();
729 * The fs_uuids list is global, and open_ctree_* will
730 * modify it, make a private copy here
732 list_for_each_entry(cur_fs, fs_uuids, list) {
733 /* don't bother handle all fs, if search target specified */
735 if (uuid_search(cur_fs, search) == 0)
740 /* skip all fs already shown as mounted fs */
741 if (is_seen_fsid(cur_fs->fsid))
744 fs_copy = malloc(sizeof(*fs_copy));
750 ret = copy_fs_devices(fs_copy, cur_fs);
756 list_add(&fs_copy->list, all_uuids);
759 list_for_each_entry(cur_fs, all_uuids, list) {
760 device = list_first_entry(&cur_fs->devices,
761 struct btrfs_device, dev_list);
765 * open_ctree_* detects seed/sprout mapping
767 fs_info = open_ctree_fs_info(device->name, 0, 0,
773 * copy the seed chain under the opened fs
775 opened_fs = fs_info->fs_devices;
777 while (opened_fs->seed) {
778 seed_copy = malloc(sizeof(*seed_copy));
783 ret = find_and_copy_seed(opened_fs->seed, seed_copy,
790 cur_seed->seed = seed_copy;
792 opened_fs = opened_fs->seed;
793 cur_seed = cur_seed->seed;
796 close_ctree(fs_info->chunk_root);
802 close_ctree(fs_info->chunk_root);
806 static const char * const cmd_show_usage[] = {
807 "btrfs filesystem show [options] [<path>|<uuid>|<device>|label]",
808 "Show the structure of a filesystem",
809 "-d|--all-devices show only disks under /dev containing btrfs filesystem",
810 "-m|--mounted show only mounted btrfs",
811 "If no argument is given, structure of all present filesystems is shown.",
815 static int cmd_show(int argc, char **argv)
817 LIST_HEAD(all_uuids);
818 struct btrfs_fs_devices *fs_devices;
821 /* default, search both kernel and udev */
824 char mp[BTRFS_PATH_NAME_MAX + 1];
826 __u8 fsid[BTRFS_FSID_SIZE];
827 char uuid_buf[BTRFS_UUID_UNPARSED_SIZE];
832 static struct option long_options[] = {
833 { "all-devices", no_argument, NULL, 'd'},
834 { "mounted", no_argument, NULL, 'm'},
835 { NULL, no_argument, NULL, 0 },
837 int c = getopt_long(argc, argv, "dm", long_options,
843 where = BTRFS_SCAN_LBLKID;
846 where = BTRFS_SCAN_MOUNTED;
849 usage(cmd_show_usage);
853 if (check_argc_max(argc, optind + 1))
854 usage(cmd_show_usage);
857 search = argv[optind];
858 if (strlen(search) == 0)
859 usage(cmd_show_usage);
860 type = check_arg_type(search);
863 * For search is a device:
864 * realpath do /dev/mapper/XX => /dev/dm-X
865 * which is required by BTRFS_SCAN_DEV
866 * For search is a mountpoint:
867 * realpath do /mnt/btrfs/ => /mnt/btrfs
868 * which shall be recognized by btrfs_scan_kernel()
870 if (!realpath(search, path)) {
871 fprintf(stderr, "ERROR: Could not show %s: %s\n",
872 search, strerror(errno));
879 * Needs special handling if input arg is block dev And if
880 * input arg is mount-point just print it right away
882 if (type == BTRFS_ARG_BLKDEV && where != BTRFS_SCAN_LBLKID) {
883 ret = get_btrfs_mount(search, mp, sizeof(mp));
885 /* given block dev is mounted */
887 type = BTRFS_ARG_MNTPOINT;
889 ret = dev_to_fsid(search, fsid);
892 "ERROR: No btrfs on %s\n",
896 uuid_unparse(fsid, uuid_buf);
898 type = BTRFS_ARG_UUID;
904 if (where == BTRFS_SCAN_LBLKID)
907 /* show mounted btrfs */
908 ret = btrfs_scan_kernel(search);
909 if (search && !ret) {
910 /* since search is found we are done */
914 /* shows mounted only */
915 if (where == BTRFS_SCAN_MOUNTED)
919 ret = btrfs_scan_lblkid();
922 fprintf(stderr, "ERROR: %d while scanning\n", ret);
927 * scan_for_btrfs() don't build seed/sprout mapping,
928 * do mapping build for each scanned fs here
930 ret = map_seed_devices(&all_uuids, search, &found);
933 "ERROR: %d while mapping seed devices\n", ret);
937 list_for_each_entry(fs_devices, &all_uuids, list)
938 print_one_uuid(fs_devices);
940 if (search && !found)
943 while (!list_empty(&all_uuids)) {
944 fs_devices = list_entry(all_uuids.next,
945 struct btrfs_fs_devices, list);
946 free_fs_devices(fs_devices);
949 printf("%s\n", BTRFS_BUILD_VERSION);
954 static const char * const cmd_sync_usage[] = {
955 "btrfs filesystem sync <path>",
956 "Force a sync on a filesystem",
960 static int cmd_sync(int argc, char **argv)
964 DIR *dirstream = NULL;
966 if (check_argc_exact(argc, 2))
967 usage(cmd_sync_usage);
971 fd = open_file_or_dir(path, &dirstream);
973 fprintf(stderr, "ERROR: can't access '%s'\n", path);
977 printf("FSSync '%s'\n", path);
978 res = ioctl(fd, BTRFS_IOC_SYNC);
980 close_file_or_dir(fd, dirstream);
982 fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
990 static int parse_compress_type(char *s)
992 if (strcmp(optarg, "zlib") == 0)
993 return BTRFS_COMPRESS_ZLIB;
994 else if (strcmp(optarg, "lzo") == 0)
995 return BTRFS_COMPRESS_LZO;
997 fprintf(stderr, "Unknown compress type %s\n", s);
1002 static const char * const cmd_defrag_usage[] = {
1003 "btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
1004 "Defragment a file or a directory",
1007 "-r defragment files recursively",
1008 "-c[zlib,lzo] compress the file while defragmenting",
1009 "-f flush data to disk immediately after defragmenting",
1010 "-s start defragment only from byte onward",
1011 "-l len defragment only up to len bytes",
1012 "-t size minimal size of file to be considered for defragmenting",
1016 static int do_defrag(int fd, int fancy_ioctl,
1017 struct btrfs_ioctl_defrag_range_args *range)
1022 ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
1024 ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, range);
1029 static int defrag_global_fancy_ioctl;
1030 static struct btrfs_ioctl_defrag_range_args defrag_global_range;
1031 static int defrag_global_verbose;
1032 static int defrag_global_errors;
1033 static int defrag_callback(const char *fpath, const struct stat *sb,
1034 int typeflag, struct FTW *ftwbuf)
1040 if ((typeflag == FTW_F) && S_ISREG(sb->st_mode)) {
1041 if (defrag_global_verbose)
1042 printf("%s\n", fpath);
1043 fd = open(fpath, O_RDWR);
1047 ret = do_defrag(fd, defrag_global_fancy_ioctl, &defrag_global_range);
1050 if (ret && e == ENOTTY && defrag_global_fancy_ioctl) {
1051 fprintf(stderr, "ERROR: defrag range ioctl not "
1052 "supported in this kernel, please try "
1053 "without any options.\n");
1054 defrag_global_errors++;
1063 fprintf(stderr, "ERROR: defrag failed on %s - %s\n", fpath, strerror(e));
1064 defrag_global_errors++;
1068 static int cmd_defrag(int argc, char **argv)
1078 struct btrfs_ioctl_defrag_range_args range;
1080 int compress_type = BTRFS_COMPRESS_NONE;
1083 defrag_global_errors = 0;
1084 defrag_global_verbose = 0;
1085 defrag_global_errors = 0;
1086 defrag_global_fancy_ioctl = 0;
1089 int c = getopt(argc, argv, "vrc::fs:l:t:");
1095 compress_type = BTRFS_COMPRESS_ZLIB;
1097 compress_type = parse_compress_type(optarg);
1098 defrag_global_fancy_ioctl = 1;
1102 defrag_global_fancy_ioctl = 1;
1105 defrag_global_verbose = 1;
1108 start = parse_size(optarg);
1109 defrag_global_fancy_ioctl = 1;
1112 len = parse_size(optarg);
1113 defrag_global_fancy_ioctl = 1;
1116 thresh = parse_size(optarg);
1117 defrag_global_fancy_ioctl = 1;
1123 usage(cmd_defrag_usage);
1127 if (check_argc_min(argc - optind, 1))
1128 usage(cmd_defrag_usage);
1130 memset(&defrag_global_range, 0, sizeof(range));
1131 defrag_global_range.start = start;
1132 defrag_global_range.len = len;
1133 defrag_global_range.extent_thresh = thresh;
1134 if (compress_type) {
1135 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
1136 defrag_global_range.compress_type = compress_type;
1139 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
1141 for (i = optind; i < argc; i++) {
1145 fd = open_file_or_dir(argv[i], &dirstream);
1147 fprintf(stderr, "ERROR: failed to open %s - %s\n", argv[i],
1149 defrag_global_errors++;
1150 close_file_or_dir(fd, dirstream);
1153 if (fstat(fd, &st)) {
1154 fprintf(stderr, "ERROR: failed to stat %s - %s\n",
1155 argv[i], strerror(errno));
1156 defrag_global_errors++;
1157 close_file_or_dir(fd, dirstream);
1160 if (!(S_ISDIR(st.st_mode) || S_ISREG(st.st_mode))) {
1162 "ERROR: %s is not a directory or a regular file\n",
1164 defrag_global_errors++;
1165 close_file_or_dir(fd, dirstream);
1169 if (S_ISDIR(st.st_mode)) {
1170 ret = nftw(argv[i], defrag_callback, 10,
1171 FTW_MOUNT | FTW_PHYS);
1174 /* errors are handled in the callback */
1177 if (defrag_global_verbose)
1178 printf("%s\n", argv[i]);
1179 ret = do_defrag(fd, defrag_global_fancy_ioctl,
1180 &defrag_global_range);
1184 if (defrag_global_verbose)
1185 printf("%s\n", argv[i]);
1186 ret = do_defrag(fd, defrag_global_fancy_ioctl,
1187 &defrag_global_range);
1190 close_file_or_dir(fd, dirstream);
1191 if (ret && e == ENOTTY && defrag_global_fancy_ioctl) {
1192 fprintf(stderr, "ERROR: defrag range ioctl not "
1193 "supported in this kernel, please try "
1194 "without any options.\n");
1195 defrag_global_errors++;
1199 fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
1200 argv[i], strerror(e));
1201 defrag_global_errors++;
1204 if (defrag_global_verbose)
1205 printf("%s\n", BTRFS_BUILD_VERSION);
1206 if (defrag_global_errors)
1207 fprintf(stderr, "total %d failures\n", defrag_global_errors);
1209 return !!defrag_global_errors;
1212 static const char * const cmd_resize_usage[] = {
1213 "btrfs filesystem resize [devid:][+/-]<newsize>[kKmMgGtTpPeE]|[devid:]max <path>",
1214 "Resize a filesystem",
1215 "If 'max' is passed, the filesystem will occupy all available space",
1216 "on the device 'devid'.",
1217 "[kK] means KiB, which denotes 1KiB = 1024B, 1MiB = 1024KiB, etc.",
1221 static int cmd_resize(int argc, char **argv)
1223 struct btrfs_ioctl_vol_args args;
1224 int fd, res, len, e;
1225 char *amount, *path;
1226 DIR *dirstream = NULL;
1228 if (check_argc_exact(argc, 3))
1229 usage(cmd_resize_usage);
1234 len = strlen(amount);
1235 if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
1236 fprintf(stderr, "ERROR: size value too long ('%s)\n",
1241 fd = open_file_or_dir(path, &dirstream);
1243 fprintf(stderr, "ERROR: can't access '%s'\n", path);
1247 printf("Resize '%s' of '%s'\n", path, amount);
1248 strncpy_null(args.name, amount);
1249 res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
1251 close_file_or_dir(fd, dirstream);
1253 fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
1260 static const char * const cmd_label_usage[] = {
1261 "btrfs filesystem label [<device>|<mount_point>] [<newlabel>]",
1262 "Get or change the label of a filesystem",
1263 "With one argument, get the label of filesystem on <device>.",
1264 "If <newlabel> is passed, set the filesystem label to <newlabel>.",
1268 static int cmd_label(int argc, char **argv)
1270 if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
1271 usage(cmd_label_usage);
1274 return set_label(argv[1], argv[2]);
1276 char label[BTRFS_LABEL_SIZE];
1279 ret = get_label(argv[1], label);
1281 fprintf(stdout, "%s\n", label);
1287 const struct cmd_group filesystem_cmd_group = {
1288 filesystem_cmd_group_usage, NULL, {
1289 { "df", cmd_df, cmd_df_usage, NULL, 0 },
1290 { "show", cmd_show, cmd_show_usage, NULL, 0 },
1291 { "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
1292 { "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
1293 { "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
1294 { "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
1295 { "label", cmd_label, cmd_label_usage, NULL, 0 },
1300 int cmd_filesystem(int argc, char **argv)
1302 return handle_command_group(&filesystem_cmd_group, argc, argv);