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 char *group_type_str(u64 flag)
141 u64 mask = BTRFS_BLOCK_GROUP_TYPE_MASK |
142 BTRFS_SPACE_INFO_GLOBAL_RSV;
144 switch (flag & mask) {
145 case BTRFS_BLOCK_GROUP_DATA:
147 case BTRFS_BLOCK_GROUP_SYSTEM:
149 case BTRFS_BLOCK_GROUP_METADATA:
151 case BTRFS_BLOCK_GROUP_DATA|BTRFS_BLOCK_GROUP_METADATA:
152 return "Data+Metadata";
153 case BTRFS_SPACE_INFO_GLOBAL_RSV:
154 return "GlobalReserve";
160 static char *group_profile_str(u64 flag)
162 switch (flag & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
165 case BTRFS_BLOCK_GROUP_RAID0:
167 case BTRFS_BLOCK_GROUP_RAID1:
169 case BTRFS_BLOCK_GROUP_RAID5:
171 case BTRFS_BLOCK_GROUP_RAID6:
173 case BTRFS_BLOCK_GROUP_DUP:
175 case BTRFS_BLOCK_GROUP_RAID10:
182 static int get_df(int fd, struct btrfs_ioctl_space_args **sargs_ret)
186 struct btrfs_ioctl_space_args *sargs;
188 sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
192 sargs->space_slots = 0;
193 sargs->total_spaces = 0;
195 ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
198 fprintf(stderr, "ERROR: couldn't get space info - %s\n",
203 /* This really should never happen */
204 if (!sargs->total_spaces) {
208 count = sargs->total_spaces;
211 sargs = malloc(sizeof(struct btrfs_ioctl_space_args) +
212 (count * sizeof(struct btrfs_ioctl_space_info)));
216 sargs->space_slots = count;
217 sargs->total_spaces = 0;
218 ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
221 fprintf(stderr, "ERROR: get space info count %llu - %s\n",
230 static void print_df(struct btrfs_ioctl_space_args *sargs, unsigned unit_mode)
233 struct btrfs_ioctl_space_info *sp = sargs->spaces;
235 for (i = 0; i < sargs->total_spaces; i++, sp++) {
236 printf("%s, %s: total=%s, used=%s\n",
237 group_type_str(sp->flags),
238 group_profile_str(sp->flags),
239 pretty_size_mode(sp->total_bytes, unit_mode),
240 pretty_size_mode(sp->used_bytes, unit_mode));
244 static int cmd_df(int argc, char **argv)
246 struct btrfs_ioctl_space_args *sargs = NULL;
250 DIR *dirstream = NULL;
251 unsigned unit_mode = UNITS_DEFAULT;
255 static const struct option long_options[] = {
256 { "raw", no_argument, NULL, 'b'},
257 { "kbytes", no_argument, NULL, 'k'},
258 { "mbytes", no_argument, NULL, 'm'},
259 { "gbytes", no_argument, NULL, 'g'},
260 { "tbytes", no_argument, NULL, 't'},
261 { "si", no_argument, NULL, 256},
262 { "iec", no_argument, NULL, 257},
264 int c = getopt_long(argc, argv, "bhHkmgt", long_options,
270 unit_mode = UNITS_RAW;
273 units_set_base(&unit_mode, UNITS_KBYTES);
276 units_set_base(&unit_mode, UNITS_MBYTES);
279 units_set_base(&unit_mode, UNITS_GBYTES);
282 units_set_base(&unit_mode, UNITS_TBYTES);
285 unit_mode = UNITS_HUMAN_BINARY;
288 unit_mode = UNITS_HUMAN_DECIMAL;
291 units_set_mode(&unit_mode, UNITS_DECIMAL);
294 units_set_mode(&unit_mode, UNITS_BINARY);
301 if (check_argc_exact(argc, optind + 1))
306 fd = open_file_or_dir(path, &dirstream);
308 fprintf(stderr, "ERROR: can't access '%s'\n", path);
311 ret = get_df(fd, &sargs);
314 print_df(sargs, unit_mode);
317 fprintf(stderr, "ERROR: get_df failed %s\n", strerror(-ret));
320 close_file_or_dir(fd, dirstream);
324 static int match_search_item_kernel(__u8 *fsid, char *mnt, char *label,
327 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
328 int search_len = strlen(search);
330 search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
331 uuid_unparse(fsid, uuidbuf);
332 if (!strncmp(uuidbuf, search, search_len))
335 if (strlen(label) && strcmp(label, search) == 0)
338 if (strcmp(mnt, search) == 0)
344 static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
346 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
347 struct list_head *cur;
348 struct btrfs_device *device;
349 int search_len = strlen(search);
351 search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
352 uuid_unparse(fs_devices->fsid, uuidbuf);
353 if (!strncmp(uuidbuf, search, search_len))
356 list_for_each(cur, &fs_devices->devices) {
357 device = list_entry(cur, struct btrfs_device, dev_list);
358 if ((device->label && strcmp(device->label, search) == 0) ||
359 strcmp(device->name, search) == 0)
366 * Sort devices by devid, ascending
368 static int cmp_device_id(void *priv, struct list_head *a,
371 const struct btrfs_device *da = list_entry(a, struct btrfs_device,
373 const struct btrfs_device *db = list_entry(b, struct btrfs_device,
376 return da->devid < db->devid ? -1 :
377 da->devid > db->devid ? 1 : 0;
380 static void splice_device_list(struct list_head *seed_devices,
381 struct list_head *all_devices)
383 struct btrfs_device *in_all, *next_all;
384 struct btrfs_device *in_seed, *next_seed;
386 list_for_each_entry_safe(in_all, next_all, all_devices, dev_list) {
387 list_for_each_entry_safe(in_seed, next_seed, seed_devices,
389 if (in_all->devid == in_seed->devid) {
391 * When do dev replace in a sprout fs
392 * to a dev in its seed fs, the replacing
393 * dev will reside in the sprout fs and
394 * the replaced dev will still exist
396 * So pick the latest one when showing
399 if (in_all->generation
400 < in_seed->generation) {
401 list_del(&in_all->dev_list);
403 } else if (in_all->generation
404 > in_seed->generation) {
405 list_del(&in_seed->dev_list);
413 list_splice(seed_devices, all_devices);
416 static void print_devices(struct btrfs_fs_devices *fs_devices,
419 struct btrfs_device *device;
420 struct btrfs_fs_devices *cur_fs;
421 struct list_head *all_devices;
423 all_devices = &fs_devices->devices;
424 cur_fs = fs_devices->seed;
425 /* add all devices of seed fs to the fs to be printed */
427 splice_device_list(&cur_fs->devices, all_devices);
428 cur_fs = cur_fs->seed;
431 list_sort(NULL, all_devices, cmp_device_id);
432 list_for_each_entry(device, all_devices, dev_list) {
433 printf("\tdevid %4llu size %s used %s path %s\n",
434 (unsigned long long)device->devid,
435 pretty_size(device->total_bytes),
436 pretty_size(device->bytes_used), device->name);
442 static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
444 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
445 struct btrfs_device *device;
449 if (add_seen_fsid(fs_devices->fsid))
452 uuid_unparse(fs_devices->fsid, uuidbuf);
453 device = list_entry(fs_devices->devices.next, struct btrfs_device,
455 if (device->label && device->label[0])
456 printf("Label: '%s' ", device->label);
458 printf("Label: none ");
460 total = device->total_devs;
461 printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
462 (unsigned long long)total,
463 pretty_size(device->super_bytes_used));
465 print_devices(fs_devices, &devs_found);
467 if (devs_found < total) {
468 printf("\t*** Some devices missing\n");
473 /* adds up all the used spaces as reported by the space info ioctl
475 static u64 calc_used_bytes(struct btrfs_ioctl_space_args *si)
479 for (i = 0; i < si->total_spaces; i++)
480 ret += si->spaces[i].used_bytes;
484 static int print_one_fs(struct btrfs_ioctl_fs_info_args *fs_info,
485 struct btrfs_ioctl_dev_info_args *dev_info,
486 struct btrfs_ioctl_space_args *space_info,
487 char *label, char *path)
492 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
493 struct btrfs_ioctl_dev_info_args *tmp_dev_info;
496 ret = add_seen_fsid(fs_info->fsid);
502 uuid_unparse(fs_info->fsid, uuidbuf);
503 if (label && strlen(label))
504 printf("Label: '%s' ", label);
506 printf("Label: none ");
508 printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
509 fs_info->num_devices,
510 pretty_size(calc_used_bytes(space_info)));
512 for (i = 0; i < fs_info->num_devices; i++) {
513 char *canonical_path;
515 tmp_dev_info = (struct btrfs_ioctl_dev_info_args *)&dev_info[i];
516 canonical_path = canonicalize_path((char *)tmp_dev_info->path);
518 /* Add check for missing devices even mounted */
519 fd = open((char *)tmp_dev_info->path, O_RDONLY);
525 printf("\tdevid %4llu size %s used %s path %s\n",
527 pretty_size(tmp_dev_info->total_bytes),
528 pretty_size(tmp_dev_info->bytes_used),
531 free(canonical_path);
535 printf("\t*** Some devices missing\n");
540 /* This function checks if the given input parameter is
542 * return -1: some error in the given input
543 * return 0: unknow input
544 * return 1: given input is uuid
545 * return 2: given input is path
547 static int check_arg_type(char *input)
555 if (realpath(input, path)) {
556 if (is_block_device(path) == 1)
557 return BTRFS_ARG_BLKDEV;
559 if (is_mount_point(path) == 1)
560 return BTRFS_ARG_MNTPOINT;
562 return BTRFS_ARG_UNKNOWN;
565 if (strlen(input) == (BTRFS_UUID_UNPARSED_SIZE - 1) &&
566 !uuid_parse(input, out))
567 return BTRFS_ARG_UUID;
569 return BTRFS_ARG_UNKNOWN;
572 static int btrfs_scan_kernel(void *search)
578 struct btrfs_ioctl_fs_info_args fs_info_arg;
579 struct btrfs_ioctl_dev_info_args *dev_info_arg = NULL;
580 struct btrfs_ioctl_space_args *space_info_arg = NULL;
581 char label[BTRFS_LABEL_SIZE];
583 f = setmntent("/proc/self/mounts", "r");
587 memset(label, 0, sizeof(label));
588 while ((mnt = getmntent(f)) != NULL) {
589 if (strcmp(mnt->mnt_type, "btrfs"))
591 ret = get_fs_info(mnt->mnt_dir, &fs_info_arg,
596 if (get_label_mounted(mnt->mnt_dir, label)) {
600 if (search && !match_search_item_kernel(fs_info_arg.fsid,
601 mnt->mnt_dir, label, search)) {
606 fd = open(mnt->mnt_dir, O_RDONLY);
607 if ((fd != -1) && !get_df(fd, &space_info_arg)) {
608 print_one_fs(&fs_info_arg, dev_info_arg,
609 space_info_arg, label, mnt->mnt_dir);
610 kfree(space_info_arg);
611 memset(label, 0, sizeof(label));
624 static int dev_to_fsid(char *dev, __u8 *fsid)
626 struct btrfs_super_block *disk_super;
635 fd = open(dev, O_RDONLY);
642 disk_super = (struct btrfs_super_block *)buf;
643 ret = btrfs_read_dev_super(fd, disk_super,
644 BTRFS_SUPER_INFO_OFFSET, 0);
648 memcpy(fsid, disk_super->fsid, BTRFS_FSID_SIZE);
657 static void free_fs_devices(struct btrfs_fs_devices *fs_devices)
659 struct btrfs_fs_devices *cur_seed, *next_seed;
660 struct btrfs_device *device;
662 while (!list_empty(&fs_devices->devices)) {
663 device = list_entry(fs_devices->devices.next,
664 struct btrfs_device, dev_list);
665 list_del(&device->dev_list);
672 /* free seed fs chain */
673 cur_seed = fs_devices->seed;
674 fs_devices->seed = NULL;
676 next_seed = cur_seed->seed;
679 cur_seed = next_seed;
682 list_del(&fs_devices->list);
686 static int copy_device(struct btrfs_device *dst,
687 struct btrfs_device *src)
689 dst->devid = src->devid;
690 memcpy(dst->uuid, src->uuid, BTRFS_UUID_SIZE);
691 if (src->name == NULL)
694 dst->name = strdup(src->name);
698 if (src->label == NULL)
701 dst->label = strdup(src->label);
707 dst->total_devs = src->total_devs;
708 dst->super_bytes_used = src->super_bytes_used;
709 dst->total_bytes = src->total_bytes;
710 dst->bytes_used = src->bytes_used;
711 dst->generation = src->generation;
716 static int copy_fs_devices(struct btrfs_fs_devices *dst,
717 struct btrfs_fs_devices *src)
719 struct btrfs_device *cur_dev, *dev_copy;
722 memcpy(dst->fsid, src->fsid, BTRFS_FSID_SIZE);
723 INIT_LIST_HEAD(&dst->devices);
726 list_for_each_entry(cur_dev, &src->devices, dev_list) {
727 dev_copy = malloc(sizeof(*dev_copy));
733 ret = copy_device(dev_copy, cur_dev);
739 list_add(&dev_copy->dev_list, &dst->devices);
740 dev_copy->fs_devices = dst;
746 static int find_and_copy_seed(struct btrfs_fs_devices *seed,
747 struct btrfs_fs_devices *copy,
748 struct list_head *fs_uuids) {
749 struct btrfs_fs_devices *cur_fs;
751 list_for_each_entry(cur_fs, fs_uuids, list)
752 if (!memcmp(seed->fsid, cur_fs->fsid, BTRFS_FSID_SIZE))
753 return copy_fs_devices(copy, cur_fs);
758 static int map_seed_devices(struct list_head *all_uuids,
759 char *search, int *found)
761 struct btrfs_fs_devices *cur_fs, *cur_seed;
762 struct btrfs_fs_devices *fs_copy, *seed_copy;
763 struct btrfs_fs_devices *opened_fs;
764 struct btrfs_device *device;
765 struct btrfs_fs_info *fs_info;
766 struct list_head *fs_uuids;
769 fs_uuids = btrfs_scanned_uuids();
772 * The fs_uuids list is global, and open_ctree_* will
773 * modify it, make a private copy here
775 list_for_each_entry(cur_fs, fs_uuids, list) {
776 /* don't bother handle all fs, if search target specified */
778 if (uuid_search(cur_fs, search) == 0)
783 /* skip all fs already shown as mounted fs */
784 if (is_seen_fsid(cur_fs->fsid))
787 fs_copy = malloc(sizeof(*fs_copy));
793 ret = copy_fs_devices(fs_copy, cur_fs);
799 list_add(&fs_copy->list, all_uuids);
802 list_for_each_entry(cur_fs, all_uuids, list) {
803 device = list_first_entry(&cur_fs->devices,
804 struct btrfs_device, dev_list);
808 * open_ctree_* detects seed/sprout mapping
810 fs_info = open_ctree_fs_info(device->name, 0, 0,
816 * copy the seed chain under the opened fs
818 opened_fs = fs_info->fs_devices;
820 while (opened_fs->seed) {
821 seed_copy = malloc(sizeof(*seed_copy));
826 ret = find_and_copy_seed(opened_fs->seed, seed_copy,
833 cur_seed->seed = seed_copy;
835 opened_fs = opened_fs->seed;
836 cur_seed = cur_seed->seed;
839 close_ctree(fs_info->chunk_root);
845 close_ctree(fs_info->chunk_root);
849 static const char * const cmd_show_usage[] = {
850 "btrfs filesystem show [options] [<path>|<uuid>|<device>|label]",
851 "Show the structure of a filesystem",
852 "-d|--all-devices show only disks under /dev containing btrfs filesystem",
853 "-m|--mounted show only mounted btrfs",
854 "If no argument is given, structure of all present filesystems is shown.",
858 static int cmd_show(int argc, char **argv)
860 LIST_HEAD(all_uuids);
861 struct btrfs_fs_devices *fs_devices;
864 /* default, search both kernel and udev */
867 char mp[BTRFS_PATH_NAME_MAX + 1];
869 __u8 fsid[BTRFS_FSID_SIZE];
870 char uuid_buf[BTRFS_UUID_UNPARSED_SIZE];
875 static struct option long_options[] = {
876 { "all-devices", no_argument, NULL, 'd'},
877 { "mounted", no_argument, NULL, 'm'},
878 { NULL, no_argument, NULL, 0 },
880 int c = getopt_long(argc, argv, "dm", long_options,
886 where = BTRFS_SCAN_LBLKID;
889 where = BTRFS_SCAN_MOUNTED;
892 usage(cmd_show_usage);
896 if (check_argc_max(argc, optind + 1))
897 usage(cmd_show_usage);
900 search = argv[optind];
901 if (strlen(search) == 0)
902 usage(cmd_show_usage);
903 type = check_arg_type(search);
905 * needs spl handling if input arg is block dev
906 * And if input arg is mount-point just print it
909 if (type == BTRFS_ARG_BLKDEV) {
910 if (where == BTRFS_SCAN_LBLKID) {
911 /* we need to do this because
912 * legacy BTRFS_SCAN_DEV
913 * provides /dev/dm-x paths
915 if (realpath(search, path))
918 ret = get_btrfs_mount(search,
921 /* given block dev is mounted*/
923 type = BTRFS_ARG_MNTPOINT;
925 ret = dev_to_fsid(search, fsid);
928 "ERROR: No btrfs on %s\n",
932 uuid_unparse(fsid, uuid_buf);
934 type = BTRFS_ARG_UUID;
941 if (where == BTRFS_SCAN_LBLKID)
944 /* show mounted btrfs */
945 ret = btrfs_scan_kernel(search);
946 if (search && !ret) {
947 /* since search is found we are done */
951 /* shows mounted only */
952 if (where == BTRFS_SCAN_MOUNTED)
956 ret = btrfs_scan_lblkid();
959 fprintf(stderr, "ERROR: %d while scanning\n", ret);
964 * scan_for_btrfs() don't build seed/sprout mapping,
965 * do mapping build for each scanned fs here
967 ret = map_seed_devices(&all_uuids, search, &found);
970 "ERROR: %d while mapping seed devices\n", ret);
974 list_for_each_entry(fs_devices, &all_uuids, list)
975 print_one_uuid(fs_devices);
977 if (search && !found)
980 while (!list_empty(&all_uuids)) {
981 fs_devices = list_entry(all_uuids.next,
982 struct btrfs_fs_devices, list);
983 free_fs_devices(fs_devices);
986 printf("%s\n", BTRFS_BUILD_VERSION);
991 static const char * const cmd_sync_usage[] = {
992 "btrfs filesystem sync <path>",
993 "Force a sync on a filesystem",
997 static int cmd_sync(int argc, char **argv)
1001 DIR *dirstream = NULL;
1003 if (check_argc_exact(argc, 2))
1004 usage(cmd_sync_usage);
1008 fd = open_file_or_dir(path, &dirstream);
1010 fprintf(stderr, "ERROR: can't access '%s'\n", path);
1014 printf("FSSync '%s'\n", path);
1015 res = ioctl(fd, BTRFS_IOC_SYNC);
1017 close_file_or_dir(fd, dirstream);
1019 fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
1027 static int parse_compress_type(char *s)
1029 if (strcmp(optarg, "zlib") == 0)
1030 return BTRFS_COMPRESS_ZLIB;
1031 else if (strcmp(optarg, "lzo") == 0)
1032 return BTRFS_COMPRESS_LZO;
1034 fprintf(stderr, "Unknown compress type %s\n", s);
1039 static const char * const cmd_defrag_usage[] = {
1040 "btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
1041 "Defragment a file or a directory",
1044 "-r defragment files recursively",
1045 "-c[zlib,lzo] compress the file while defragmenting",
1046 "-f flush data to disk immediately after defragmenting",
1047 "-s start defragment only from byte onward",
1048 "-l len defragment only up to len bytes",
1049 "-t size minimal size of file to be considered for defragmenting",
1053 static int do_defrag(int fd, int fancy_ioctl,
1054 struct btrfs_ioctl_defrag_range_args *range)
1059 ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
1061 ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, range);
1066 static int defrag_global_fancy_ioctl;
1067 static struct btrfs_ioctl_defrag_range_args defrag_global_range;
1068 static int defrag_global_verbose;
1069 static int defrag_global_errors;
1070 static int defrag_callback(const char *fpath, const struct stat *sb,
1071 int typeflag, struct FTW *ftwbuf)
1077 if ((typeflag == FTW_F) && S_ISREG(sb->st_mode)) {
1078 if (defrag_global_verbose)
1079 printf("%s\n", fpath);
1080 fd = open(fpath, O_RDWR);
1084 ret = do_defrag(fd, defrag_global_fancy_ioctl, &defrag_global_range);
1087 if (ret && e == ENOTTY && defrag_global_fancy_ioctl) {
1088 fprintf(stderr, "ERROR: defrag range ioctl not "
1089 "supported in this kernel, please try "
1090 "without any options.\n");
1091 defrag_global_errors++;
1100 fprintf(stderr, "ERROR: defrag failed on %s - %s\n", fpath, strerror(e));
1101 defrag_global_errors++;
1105 static int cmd_defrag(int argc, char **argv)
1115 struct btrfs_ioctl_defrag_range_args range;
1117 int compress_type = BTRFS_COMPRESS_NONE;
1120 defrag_global_errors = 0;
1121 defrag_global_verbose = 0;
1122 defrag_global_errors = 0;
1123 defrag_global_fancy_ioctl = 0;
1126 int c = getopt(argc, argv, "vrc::fs:l:t:");
1132 compress_type = BTRFS_COMPRESS_ZLIB;
1134 compress_type = parse_compress_type(optarg);
1135 defrag_global_fancy_ioctl = 1;
1139 defrag_global_fancy_ioctl = 1;
1142 defrag_global_verbose = 1;
1145 start = parse_size(optarg);
1146 defrag_global_fancy_ioctl = 1;
1149 len = parse_size(optarg);
1150 defrag_global_fancy_ioctl = 1;
1153 thresh = parse_size(optarg);
1154 defrag_global_fancy_ioctl = 1;
1160 usage(cmd_defrag_usage);
1164 if (check_argc_min(argc - optind, 1))
1165 usage(cmd_defrag_usage);
1167 memset(&defrag_global_range, 0, sizeof(range));
1168 defrag_global_range.start = start;
1169 defrag_global_range.len = len;
1170 defrag_global_range.extent_thresh = thresh;
1171 if (compress_type) {
1172 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
1173 defrag_global_range.compress_type = compress_type;
1176 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
1178 for (i = optind; i < argc; i++) {
1182 fd = open_file_or_dir(argv[i], &dirstream);
1184 fprintf(stderr, "ERROR: failed to open %s - %s\n", argv[i],
1186 defrag_global_errors++;
1187 close_file_or_dir(fd, dirstream);
1190 if (fstat(fd, &st)) {
1191 fprintf(stderr, "ERROR: failed to stat %s - %s\n",
1192 argv[i], strerror(errno));
1193 defrag_global_errors++;
1194 close_file_or_dir(fd, dirstream);
1197 if (!(S_ISDIR(st.st_mode) || S_ISREG(st.st_mode))) {
1199 "ERROR: %s is not a directory or a regular file\n",
1201 defrag_global_errors++;
1202 close_file_or_dir(fd, dirstream);
1206 if (S_ISDIR(st.st_mode)) {
1207 ret = nftw(argv[i], defrag_callback, 10,
1208 FTW_MOUNT | FTW_PHYS);
1211 /* errors are handled in the callback */
1214 if (defrag_global_verbose)
1215 printf("%s\n", argv[i]);
1216 ret = do_defrag(fd, defrag_global_fancy_ioctl,
1217 &defrag_global_range);
1221 if (defrag_global_verbose)
1222 printf("%s\n", argv[i]);
1223 ret = do_defrag(fd, defrag_global_fancy_ioctl,
1224 &defrag_global_range);
1227 close_file_or_dir(fd, dirstream);
1228 if (ret && e == ENOTTY && defrag_global_fancy_ioctl) {
1229 fprintf(stderr, "ERROR: defrag range ioctl not "
1230 "supported in this kernel, please try "
1231 "without any options.\n");
1232 defrag_global_errors++;
1236 fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
1237 argv[i], strerror(e));
1238 defrag_global_errors++;
1241 if (defrag_global_verbose)
1242 printf("%s\n", BTRFS_BUILD_VERSION);
1243 if (defrag_global_errors)
1244 fprintf(stderr, "total %d failures\n", defrag_global_errors);
1246 return !!defrag_global_errors;
1249 static const char * const cmd_resize_usage[] = {
1250 "btrfs filesystem resize [devid:][+/-]<newsize>[kKmMgGtTpPeE]|[devid:]max <path>",
1251 "Resize a filesystem",
1252 "If 'max' is passed, the filesystem will occupy all available space",
1253 "on the device 'devid'.",
1254 "[kK] means KiB, which denotes 1KiB = 1024B, 1MiB = 1024KiB, etc.",
1258 static int cmd_resize(int argc, char **argv)
1260 struct btrfs_ioctl_vol_args args;
1261 int fd, res, len, e;
1262 char *amount, *path;
1263 DIR *dirstream = NULL;
1265 if (check_argc_exact(argc, 3))
1266 usage(cmd_resize_usage);
1271 len = strlen(amount);
1272 if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
1273 fprintf(stderr, "ERROR: size value too long ('%s)\n",
1278 fd = open_file_or_dir(path, &dirstream);
1280 fprintf(stderr, "ERROR: can't access '%s'\n", path);
1284 printf("Resize '%s' of '%s'\n", path, amount);
1285 strncpy_null(args.name, amount);
1286 res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
1288 close_file_or_dir(fd, dirstream);
1290 fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
1297 static const char * const cmd_label_usage[] = {
1298 "btrfs filesystem label [<device>|<mount_point>] [<newlabel>]",
1299 "Get or change the label of a filesystem",
1300 "With one argument, get the label of filesystem on <device>.",
1301 "If <newlabel> is passed, set the filesystem label to <newlabel>.",
1305 static int cmd_label(int argc, char **argv)
1307 if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
1308 usage(cmd_label_usage);
1311 return set_label(argv[1], argv[2]);
1313 char label[BTRFS_LABEL_SIZE];
1316 ret = get_label(argv[1], label);
1318 fprintf(stdout, "%s\n", label);
1324 const struct cmd_group filesystem_cmd_group = {
1325 filesystem_cmd_group_usage, NULL, {
1326 { "df", cmd_df, cmd_df_usage, NULL, 0 },
1327 { "show", cmd_show, cmd_show_usage, NULL, 0 },
1328 { "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
1329 { "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
1330 { "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
1331 { "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
1332 { "label", cmd_label, cmd_label_usage, NULL, 0 },
1337 int cmd_filesystem(int argc, char **argv)
1339 return handle_command_group(&filesystem_cmd_group, argc, argv);