cmds-filesystem.c

   1 /*
   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.
   5  *
   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.
  10  *
  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.
  15  */
  16
  17 #define _XOPEN_SOURCE 500
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <unistd.h>
  22 #include <sys/ioctl.h>
  23 #include <errno.h>
  24 #include <uuid/uuid.h>
  25 #include <ctype.h>
  26 #include <fcntl.h>
  27 #include <ftw.h>
  28 #include <mntent.h>
  29 #include <linux/limits.h>
  30 #include <getopt.h>
  31
  32 #include "kerncompat.h"
  33 #include "ctree.h"
  34 #include "ioctl.h"
  35 #include "utils.h"
  36 #include "volumes.h"
  37 #include "version.h"
  38 #include "commands.h"
  39 #include "list_sort.h"
  40
  41
  42 /*
  43  * for btrfs fi show, we maintain a hash of fsids we've already printed.
  44  * This way we don't print dups if a given FS is mounted more than once.
  45  */
  46 #define SEEN_FSID_HASH_SIZE 256
  47
  48 struct seen_fsid {
  49         u8 fsid[BTRFS_FSID_SIZE];
  50         struct seen_fsid *next;
  51 };
  52
  53 static struct seen_fsid *seen_fsid_hash[SEEN_FSID_HASH_SIZE] = {NULL,};
  54
  55 static int add_seen_fsid(u8 *fsid)
  56 {
  57         u8 hash = fsid[0];
  58         int slot = hash % SEEN_FSID_HASH_SIZE;
  59         struct seen_fsid *seen = seen_fsid_hash[slot];
  60         struct seen_fsid *alloc;
  61
  62         if (!seen)
  63                 goto insert;
  64
  65         while (1) {
  66                 if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0)
  67                         return -EEXIST;
  68
  69                 if (!seen->next)
  70                         break;
  71
  72                 seen = seen->next;
  73         }
  74
  75 insert:
  76
  77         alloc = malloc(sizeof(*alloc));
  78         if (!alloc)
  79                 return -ENOMEM;
  80
  81         alloc->next = NULL;
  82         memcpy(alloc->fsid, fsid, BTRFS_FSID_SIZE);
  83
  84         if (seen)
  85                 seen->next = alloc;
  86         else
  87                 seen_fsid_hash[slot] = alloc;
  88
  89         return 0;
  90 }
  91
  92 static void free_seen_fsid(void)
  93 {
  94         int slot;
  95         struct seen_fsid *seen;
  96         struct seen_fsid *next;
  97
  98         for (slot = 0; slot < SEEN_FSID_HASH_SIZE; slot++) {
  99                 seen = seen_fsid_hash[slot];
 100                 while (seen) {
 101                         next = seen->next;
 102                         free(seen);
 103                         seen = next;
 104                 }
 105                 seen_fsid_hash[slot] = NULL;
 106         }
 107 }
 108
 109 static const char * const filesystem_cmd_group_usage[] = {
 110         "btrfs filesystem [<group>] <command> [<args>]",
 111         NULL
 112 };
 113
 114 static const char * const cmd_df_usage[] = {
 115         "btrfs filesystem df <path>",
 116         "Show space usage information for a mount point",
 117         NULL
 118 };
 119
 120 static char *group_type_str(u64 flag)
 121 {
 122         switch (flag & BTRFS_BLOCK_GROUP_TYPE_MASK) {
 123         case BTRFS_BLOCK_GROUP_DATA:
 124                 return "Data";
 125         case BTRFS_BLOCK_GROUP_SYSTEM:
 126                 return "System";
 127         case BTRFS_BLOCK_GROUP_METADATA:
 128                 return "Metadata";
 129         case BTRFS_BLOCK_GROUP_DATA|BTRFS_BLOCK_GROUP_METADATA:
 130                 return "Data+Metadata";
 131         default:
 132                 return "unknown";
 133         }
 134 }
 135
 136 static char *group_profile_str(u64 flag)
 137 {
 138         switch (flag & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
 139         case 0:
 140                 return "single";
 141         case BTRFS_BLOCK_GROUP_RAID0:
 142                 return "RAID0";
 143         case BTRFS_BLOCK_GROUP_RAID1:
 144                 return "RAID1";
 145         case BTRFS_BLOCK_GROUP_RAID5:
 146                 return "RAID5";
 147         case BTRFS_BLOCK_GROUP_RAID6:
 148                 return "RAID6";
 149         case BTRFS_BLOCK_GROUP_DUP:
 150                 return "DUP";
 151         case BTRFS_BLOCK_GROUP_RAID10:
 152                 return "RAID10";
 153         default:
 154                 return "unknown";
 155         }
 156 }
 157
 158 static int get_df(int fd, struct btrfs_ioctl_space_args **sargs_ret)
 159 {
 160         u64 count = 0;
 161         int ret, e;
 162         struct btrfs_ioctl_space_args *sargs;
 163
 164         sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
 165         if (!sargs)
 166                 return -ENOMEM;
 167
 168         sargs->space_slots = 0;
 169         sargs->total_spaces = 0;
 170
 171         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
 172         e = errno;
 173         if (ret) {
 174                 fprintf(stderr, "ERROR: couldn't get space info - %s\n",
 175                         strerror(e));
 176                 free(sargs);
 177                 return -e;
 178         }
 179         /* This really should never happen */
 180         if (!sargs->total_spaces) {
 181                 free(sargs);
 182                 return -ENOENT;
 183         }
 184         count = sargs->total_spaces;
 185         free(sargs);
 186
 187         sargs = malloc(sizeof(struct btrfs_ioctl_space_args) +
 188                         (count * sizeof(struct btrfs_ioctl_space_info)));
 189         if (!sargs)
 190                 ret = -ENOMEM;
 191
 192         sargs->space_slots = count;
 193         sargs->total_spaces = 0;
 194         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
 195         e = errno;
 196         if (ret) {
 197                 fprintf(stderr, "ERROR: get space info count %llu - %s\n",
 198                                 count, strerror(e));
 199                 free(sargs);
 200                 return -e;
 201         }
 202         *sargs_ret = sargs;
 203         return 0;
 204 }
 205
 206 static void print_df(struct btrfs_ioctl_space_args *sargs)
 207 {
 208         u64 i;
 209         struct btrfs_ioctl_space_info *sp = sargs->spaces;
 210
 211         for (i = 0; i < sargs->total_spaces; i++, sp++) {
 212                 printf("%s, %s: total=%s, used=%s\n",
 213                         group_type_str(sp->flags),
 214                         group_profile_str(sp->flags),
 215                         pretty_size(sp->total_bytes),
 216                         pretty_size(sp->used_bytes));
 217         }
 218 }
 219
 220 static int cmd_df(int argc, char **argv)
 221 {
 222         struct btrfs_ioctl_space_args *sargs = NULL;
 223         int ret;
 224         int fd;
 225         char *path;
 226         DIR  *dirstream = NULL;
 227
 228         if (check_argc_exact(argc, 2))
 229                 usage(cmd_df_usage);
 230
 231         path = argv[1];
 232
 233         fd = open_file_or_dir(path, &dirstream);
 234         if (fd < 0) {
 235                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 236                 return 1;
 237         }
 238         ret = get_df(fd, &sargs);
 239
 240         if (!ret && sargs) {
 241                 print_df(sargs);
 242                 free(sargs);
 243         } else {
 244                 fprintf(stderr, "ERROR: get_df failed %s\n", strerror(-ret));
 245         }
 246
 247         close_file_or_dir(fd, dirstream);
 248         return !!ret;
 249 }
 250
 251 static int match_search_item_kernel(__u8 *fsid, char *mnt, char *label,
 252                                         char *search)
 253 {
 254         char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
 255         int search_len = strlen(search);
 256
 257         search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
 258         uuid_unparse(fsid, uuidbuf);
 259         if (!strncmp(uuidbuf, search, search_len))
 260                 return 1;
 261
 262         if (strlen(label) && strcmp(label, search) == 0)
 263                 return 1;
 264
 265         if (strcmp(mnt, search) == 0)
 266                 return 1;
 267
 268         return 0;
 269 }
 270
 271 static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
 272 {
 273         char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
 274         struct list_head *cur;
 275         struct btrfs_device *device;
 276         int search_len = strlen(search);
 277
 278         search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
 279         uuid_unparse(fs_devices->fsid, uuidbuf);
 280         if (!strncmp(uuidbuf, search, search_len))
 281                 return 1;
 282
 283         list_for_each(cur, &fs_devices->devices) {
 284                 device = list_entry(cur, struct btrfs_device, dev_list);
 285                 if ((device->label && strcmp(device->label, search) == 0) ||
 286                     strcmp(device->name, search) == 0)
 287                         return 1;
 288         }
 289         return 0;
 290 }
 291
 292 /*
 293  * Sort devices by devid, ascending
 294  */
 295 static int cmp_device_id(void *priv, struct list_head *a,
 296                 struct list_head *b)
 297 {
 298         const struct btrfs_device *da = list_entry(a, struct btrfs_device,
 299                         dev_list);
 300         const struct btrfs_device *db = list_entry(b, struct btrfs_device,
 301                         dev_list);
 302
 303         return da->devid < db->devid ? -1 :
 304                 da->devid > db->devid ? 1 : 0;
 305 }
 306
 307 static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
 308 {
 309         char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
 310         struct list_head *cur;
 311         struct btrfs_device *device;
 312         u64 devs_found = 0;
 313         u64 total;
 314
 315         if (add_seen_fsid(fs_devices->fsid))
 316                 return;
 317
 318         uuid_unparse(fs_devices->fsid, uuidbuf);
 319         device = list_entry(fs_devices->devices.next, struct btrfs_device,
 320                             dev_list);
 321         if (device->label && device->label[0])
 322                 printf("Label: '%s' ", device->label);
 323         else
 324                 printf("Label: none ");
 325
 326
 327         total = device->total_devs;
 328         printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
 329                (unsigned long long)total,
 330                pretty_size(device->super_bytes_used));
 331
 332         list_sort(NULL, &fs_devices->devices, cmp_device_id);
 333         list_for_each(cur, &fs_devices->devices) {
 334                 device = list_entry(cur, struct btrfs_device, dev_list);
 335
 336                 printf("\tdevid %4llu size %s used %s path %s\n",
 337                        (unsigned long long)device->devid,
 338                        pretty_size(device->total_bytes),
 339                        pretty_size(device->bytes_used), device->name);
 340
 341                 devs_found++;
 342         }
 343         if (devs_found < total) {
 344                 printf("\t*** Some devices missing\n");
 345         }
 346         printf("\n");
 347 }
 348
 349 /* adds up all the used spaces as reported by the space info ioctl
 350  */
 351 static u64 calc_used_bytes(struct btrfs_ioctl_space_args *si)
 352 {
 353         u64 ret = 0;
 354         int i;
 355         for (i = 0; i < si->total_spaces; i++)
 356                 ret += si->spaces[i].used_bytes;
 357         return ret;
 358 }
 359
 360 static int print_one_fs(struct btrfs_ioctl_fs_info_args *fs_info,
 361                 struct btrfs_ioctl_dev_info_args *dev_info,
 362                 struct btrfs_ioctl_space_args *space_info,
 363                 char *label, char *path)
 364 {
 365         int i;
 366         char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
 367         struct btrfs_ioctl_dev_info_args *tmp_dev_info;
 368         int ret;
 369
 370         ret = add_seen_fsid(fs_info->fsid);
 371         if (ret == -EEXIST)
 372                 return 0;
 373         else if (ret)
 374                 return ret;
 375
 376         uuid_unparse(fs_info->fsid, uuidbuf);
 377         if (label && strlen(label))
 378                 printf("Label: '%s' ", label);
 379         else
 380                 printf("Label: none ");
 381
 382         printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
 383                         fs_info->num_devices,
 384                         pretty_size(calc_used_bytes(space_info)));
 385
 386         for (i = 0; i < fs_info->num_devices; i++) {
 387                 tmp_dev_info = (struct btrfs_ioctl_dev_info_args *)&dev_info[i];
 388                 printf("\tdevid %4llu size %s used %s path %s\n",
 389                         tmp_dev_info->devid,
 390                         pretty_size(tmp_dev_info->total_bytes),
 391                         pretty_size(tmp_dev_info->bytes_used),
 392                         tmp_dev_info->path);
 393         }
 394
 395         printf("\n");
 396         return 0;
 397 }
 398
 399 /* This function checks if the given input parameter is
 400  * an uuid or a path
 401  * return -1: some error in the given input
 402  * return 0: unknow input
 403  * return 1: given input is uuid
 404  * return 2: given input is path
 405  */
 406 static int check_arg_type(char *input)
 407 {
 408         uuid_t  out;
 409         char path[PATH_MAX];
 410
 411         if (!input)
 412                 return -EINVAL;
 413
 414         if (realpath(input, path)) {
 415                 if (is_block_device(input) == 1)
 416                         return BTRFS_ARG_BLKDEV;
 417
 418                 if (is_mount_point(input) == 1)
 419                         return BTRFS_ARG_MNTPOINT;
 420
 421                 return BTRFS_ARG_UNKNOWN;
 422         }
 423
 424         if (strlen(input) == (BTRFS_UUID_UNPARSED_SIZE - 1) &&
 425                 !uuid_parse(input, out))
 426                 return BTRFS_ARG_UUID;
 427
 428         return BTRFS_ARG_UNKNOWN;
 429 }
 430
 431 static int btrfs_scan_kernel(void *search)
 432 {
 433         int ret = 0, fd;
 434         FILE *f;
 435         struct mntent *mnt;
 436         struct btrfs_ioctl_fs_info_args fs_info_arg;
 437         struct btrfs_ioctl_dev_info_args *dev_info_arg = NULL;
 438         struct btrfs_ioctl_space_args *space_info_arg;
 439         char label[BTRFS_LABEL_SIZE];
 440
 441         f = setmntent("/proc/self/mounts", "r");
 442         if (f == NULL)
 443                 return 1;
 444
 445         memset(label, 0, sizeof(label));
 446         while ((mnt = getmntent(f)) != NULL) {
 447                 if (strcmp(mnt->mnt_type, "btrfs"))
 448                         continue;
 449                 ret = get_fs_info(mnt->mnt_dir, &fs_info_arg,
 450                                 &dev_info_arg);
 451                 if (ret)
 452                         return ret;
 453
 454                 if (get_label_mounted(mnt->mnt_dir, label)) {
 455                         kfree(dev_info_arg);
 456                         return 1;
 457                 }
 458                 if (search && !match_search_item_kernel(fs_info_arg.fsid,
 459                                         mnt->mnt_dir, label, search)) {
 460                         kfree(dev_info_arg);
 461                         continue;
 462                 }
 463
 464                 fd = open(mnt->mnt_dir, O_RDONLY);
 465                 if ((fd != -1) && !get_df(fd, &space_info_arg)) {
 466                         print_one_fs(&fs_info_arg, dev_info_arg,
 467                                         space_info_arg, label, mnt->mnt_dir);
 468                         kfree(space_info_arg);
 469                         memset(label, 0, sizeof(label));
 470                 }
 471                 if (fd != -1)
 472                         close(fd);
 473                 kfree(dev_info_arg);
 474                 if (search)
 475                         return 0;
 476         }
 477         if (search)
 478                 return 1;
 479         return 0;
 480 }
 481
 482 static const char * const cmd_show_usage[] = {
 483         "btrfs filesystem show [options] [<path>|<uuid>|<device>|label]",
 484         "Show the structure of a filesystem",
 485         "-d|--all-devices   show only disks under /dev containing btrfs filesystem",
 486         "-m|--mounted       show only mounted btrfs",
 487         "If no argument is given, structure of all present filesystems is shown.",
 488         NULL
 489 };
 490
 491 static int cmd_show(int argc, char **argv)
 492 {
 493         struct list_head *all_uuids;
 494         struct btrfs_fs_devices *fs_devices;
 495         struct list_head *cur_uuid;
 496         char *search = NULL;
 497         int ret;
 498         int where = BTRFS_SCAN_LBLKID;
 499         int type = 0;
 500         char mp[BTRFS_PATH_NAME_MAX + 1];
 501         char path[PATH_MAX];
 502
 503         while (1) {
 504                 int long_index;
 505                 static struct option long_options[] = {
 506                         { "all-devices", no_argument, NULL, 'd'},
 507                         { "mounted", no_argument, NULL, 'm'},
 508                         { NULL, no_argument, NULL, 0 },
 509                 };
 510                 int c = getopt_long(argc, argv, "dm", long_options,
 511                                         &long_index);
 512                 if (c < 0)
 513                         break;
 514                 switch (c) {
 515                 case 'd':
 516                         where = BTRFS_SCAN_DEV;
 517                         break;
 518                 case 'm':
 519                         where = BTRFS_SCAN_MOUNTED;
 520                         break;
 521                 default:
 522                         usage(cmd_show_usage);
 523                 }
 524         }
 525
 526         if (check_argc_max(argc, optind + 1))
 527                 usage(cmd_show_usage);
 528
 529         if (argc > optind) {
 530                 search = argv[optind];
 531                 if (strlen(search) == 0)
 532                         usage(cmd_show_usage);
 533                 type = check_arg_type(search);
 534                 if (type == BTRFS_ARG_BLKDEV) {
 535                         if (where == BTRFS_SCAN_DEV) {
 536                                 /* we need to do this because
 537                                  * legacy BTRFS_SCAN_DEV
 538                                  * provides /dev/dm-x paths
 539                                  */
 540                                 if (realpath(search, path))
 541                                         search = path;
 542                         } else {
 543                                 ret = get_btrfs_mount(search,
 544                                                 mp, sizeof(mp));
 545                                 if (!ret)
 546                                         /* given block dev is mounted*/
 547                                         search = mp;
 548                                 else
 549                                         goto devs_only;
 550                         }
 551                 }
 552         }
 553
 554         if (where == BTRFS_SCAN_DEV)
 555                 goto devs_only;
 556
 557         /* show mounted btrfs */
 558         ret = btrfs_scan_kernel(search);
 559         if (search && !ret)
 560                 return 0;
 561
 562         /* shows mounted only */
 563         if (where == BTRFS_SCAN_MOUNTED)
 564                 goto out;
 565
 566 devs_only:
 567         ret = scan_for_btrfs(where, !BTRFS_UPDATE_KERNEL);
 568
 569         if (ret) {
 570                 fprintf(stderr, "ERROR: %d while scanning\n", ret);
 571                 return 1;
 572         }
 573
 574         all_uuids = btrfs_scanned_uuids();
 575         list_for_each(cur_uuid, all_uuids) {
 576                 fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
 577                                         list);
 578                 if (search && uuid_search(fs_devices, search) == 0)
 579                         continue;
 580
 581                 print_one_uuid(fs_devices);
 582         }
 583
 584 out:
 585         printf("%s\n", BTRFS_BUILD_VERSION);
 586         free_seen_fsid();
 587         return 0;
 588 }
 589
 590 static const char * const cmd_sync_usage[] = {
 591         "btrfs filesystem sync <path>",
 592         "Force a sync on a filesystem",
 593         NULL
 594 };
 595
 596 static int cmd_sync(int argc, char **argv)
 597 {
 598         int     fd, res, e;
 599         char    *path;
 600         DIR     *dirstream = NULL;
 601
 602         if (check_argc_exact(argc, 2))
 603                 usage(cmd_sync_usage);
 604
 605         path = argv[1];
 606
 607         fd = open_file_or_dir(path, &dirstream);
 608         if (fd < 0) {
 609                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 610                 return 1;
 611         }
 612
 613         printf("FSSync '%s'\n", path);
 614         res = ioctl(fd, BTRFS_IOC_SYNC);
 615         e = errno;
 616         close_file_or_dir(fd, dirstream);
 617         if( res < 0 ){
 618                 fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
 619                         path, strerror(e));
 620                 return 1;
 621         }
 622
 623         return 0;
 624 }
 625
 626 static int parse_compress_type(char *s)
 627 {
 628         if (strcmp(optarg, "zlib") == 0)
 629                 return BTRFS_COMPRESS_ZLIB;
 630         else if (strcmp(optarg, "lzo") == 0)
 631                 return BTRFS_COMPRESS_LZO;
 632         else {
 633                 fprintf(stderr, "Unknown compress type %s\n", s);
 634                 exit(1);
 635         };
 636 }
 637
 638 static const char * const cmd_defrag_usage[] = {
 639         "btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
 640         "Defragment a file or a directory",
 641         "",
 642         "-v             be verbose",
 643         "-r             defragment files recursively",
 644         "-c[zlib,lzo]   compress the file while defragmenting",
 645         "-f             flush data to disk immediately after defragmenting",
 646         "-s start       defragment only from byte onward",
 647         "-l len         defragment only up to len bytes",
 648         "-t size        minimal size of file to be considered for defragmenting",
 649         NULL
 650 };
 651
 652 static int do_defrag(int fd, int fancy_ioctl,
 653                 struct btrfs_ioctl_defrag_range_args *range)
 654 {
 655         int ret;
 656
 657         if (!fancy_ioctl)
 658                 ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
 659         else
 660                 ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, range);
 661
 662         return ret;
 663 }
 664
 665 static int defrag_global_fancy_ioctl;
 666 static struct btrfs_ioctl_defrag_range_args defrag_global_range;
 667 static int defrag_global_verbose;
 668 static int defrag_global_errors;
 669 static int defrag_callback(const char *fpath, const struct stat *sb,
 670                 int typeflag, struct FTW *ftwbuf)
 671 {
 672         int ret = 0;
 673         int e = 0;
 674         int fd = 0;
 675
 676         if (typeflag == FTW_F) {
 677                 if (defrag_global_verbose)
 678                         printf("%s\n", fpath);
 679                 fd = open(fpath, O_RDWR);
 680                 e = errno;
 681                 if (fd < 0)
 682                         goto error;
 683                 ret = do_defrag(fd, defrag_global_fancy_ioctl, &defrag_global_range);
 684                 e = errno;
 685                 close(fd);
 686                 if (ret && e == ENOTTY) {
 687                         fprintf(stderr, "ERROR: defrag range ioctl not "
 688                                 "supported in this kernel, please try "
 689                                 "without any options.\n");
 690                         defrag_global_errors++;
 691                         return ENOTTY;
 692                 }
 693                 if (ret)
 694                         goto error;
 695         }
 696         return 0;
 697
 698 error:
 699         fprintf(stderr, "ERROR: defrag failed on %s - %s\n", fpath, strerror(e));
 700         defrag_global_errors++;
 701         return 0;
 702 }
 703
 704 static int cmd_defrag(int argc, char **argv)
 705 {
 706         int fd;
 707         int flush = 0;
 708         u64 start = 0;
 709         u64 len = (u64)-1;
 710         u32 thresh = 0;
 711         int i;
 712         int recursive = 0;
 713         int ret = 0;
 714         struct btrfs_ioctl_defrag_range_args range;
 715         int e = 0;
 716         int compress_type = BTRFS_COMPRESS_NONE;
 717         DIR *dirstream;
 718
 719         defrag_global_errors = 0;
 720         defrag_global_verbose = 0;
 721         defrag_global_errors = 0;
 722         defrag_global_fancy_ioctl = 0;
 723         optind = 1;
 724         while(1) {
 725                 int c = getopt(argc, argv, "vrc::fs:l:t:");
 726                 if (c < 0)
 727                         break;
 728
 729                 switch(c) {
 730                 case 'c':
 731                         compress_type = BTRFS_COMPRESS_ZLIB;
 732                         if (optarg)
 733                                 compress_type = parse_compress_type(optarg);
 734                         defrag_global_fancy_ioctl = 1;
 735                         break;
 736                 case 'f':
 737                         flush = 1;
 738                         defrag_global_fancy_ioctl = 1;
 739                         break;
 740                 case 'v':
 741                         defrag_global_verbose = 1;
 742                         break;
 743                 case 's':
 744                         start = parse_size(optarg);
 745                         defrag_global_fancy_ioctl = 1;
 746                         break;
 747                 case 'l':
 748                         len = parse_size(optarg);
 749                         defrag_global_fancy_ioctl = 1;
 750                         break;
 751                 case 't':
 752                         thresh = parse_size(optarg);
 753                         defrag_global_fancy_ioctl = 1;
 754                         break;
 755                 case 'r':
 756                         recursive = 1;
 757                         break;
 758                 default:
 759                         usage(cmd_defrag_usage);
 760                 }
 761         }
 762
 763         if (check_argc_min(argc - optind, 1))
 764                 usage(cmd_defrag_usage);
 765
 766         memset(&defrag_global_range, 0, sizeof(range));
 767         defrag_global_range.start = start;
 768         defrag_global_range.len = len;
 769         defrag_global_range.extent_thresh = thresh;
 770         if (compress_type) {
 771                 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
 772                 defrag_global_range.compress_type = compress_type;
 773         }
 774         if (flush)
 775                 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
 776
 777         for (i = optind; i < argc; i++) {
 778                 dirstream = NULL;
 779                 fd = open_file_or_dir(argv[i], &dirstream);
 780                 if (fd < 0) {
 781                         fprintf(stderr, "ERROR: failed to open %s - %s\n", argv[i],
 782                                         strerror(errno));
 783                         defrag_global_errors++;
 784                         close_file_or_dir(fd, dirstream);
 785                         continue;
 786                 }
 787                 if (recursive) {
 788                         struct stat st;
 789
 790                         if (fstat(fd, &st)) {
 791                                 fprintf(stderr, "ERROR: failed to stat %s - %s\n",
 792                                                 argv[i], strerror(errno));
 793                                 defrag_global_errors++;
 794                                 close_file_or_dir(fd, dirstream);
 795                                 continue;
 796                         }
 797                         if (S_ISDIR(st.st_mode)) {
 798                                 ret = nftw(argv[i], defrag_callback, 10,
 799                                                 FTW_MOUNT | FTW_PHYS);
 800                                 if (ret == ENOTTY)
 801                                         exit(1);
 802                                 /* errors are handled in the callback */
 803                                 ret = 0;
 804                         } else {
 805                                 if (defrag_global_verbose)
 806                                         printf("%s\n", argv[i]);
 807                                 ret = do_defrag(fd, defrag_global_fancy_ioctl,
 808                                                 &defrag_global_range);
 809                                 e = errno;
 810                         }
 811                 } else {
 812                         if (defrag_global_verbose)
 813                                 printf("%s\n", argv[i]);
 814                         ret = do_defrag(fd, defrag_global_fancy_ioctl,
 815                                         &defrag_global_range);
 816                         e = errno;
 817                 }
 818                 close_file_or_dir(fd, dirstream);
 819                 if (ret && e == ENOTTY) {
 820                         fprintf(stderr, "ERROR: defrag range ioctl not "
 821                                 "supported in this kernel, please try "
 822                                 "without any options.\n");
 823                         defrag_global_errors++;
 824                         break;
 825                 }
 826                 if (ret) {
 827                         fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
 828                                 argv[i], strerror(e));
 829                         defrag_global_errors++;
 830                 }
 831         }
 832         if (defrag_global_verbose)
 833                 printf("%s\n", BTRFS_BUILD_VERSION);
 834         if (defrag_global_errors)
 835                 fprintf(stderr, "total %d failures\n", defrag_global_errors);
 836
 837         return !!defrag_global_errors;
 838 }
 839
 840 static const char * const cmd_resize_usage[] = {
 841         "btrfs filesystem resize [devid:][+/-]<newsize>[gkm]|[devid:]max <path>",
 842         "Resize a filesystem",
 843         "If 'max' is passed, the filesystem will occupy all available space",
 844         "on the device 'devid'.",
 845         NULL
 846 };
 847
 848 static int cmd_resize(int argc, char **argv)
 849 {
 850         struct btrfs_ioctl_vol_args     args;
 851         int     fd, res, len, e;
 852         char    *amount, *path;
 853         DIR     *dirstream = NULL;
 854
 855         if (check_argc_exact(argc, 3))
 856                 usage(cmd_resize_usage);
 857
 858         amount = argv[1];
 859         path = argv[2];
 860
 861         len = strlen(amount);
 862         if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
 863                 fprintf(stderr, "ERROR: size value too long ('%s)\n",
 864                         amount);
 865                 return 1;
 866         }
 867
 868         fd = open_file_or_dir(path, &dirstream);
 869         if (fd < 0) {
 870                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 871                 return 1;
 872         }
 873
 874         printf("Resize '%s' of '%s'\n", path, amount);
 875         strncpy_null(args.name, amount);
 876         res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
 877         e = errno;
 878         close_file_or_dir(fd, dirstream);
 879         if( res < 0 ){
 880                 fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
 881                         path, strerror(e));
 882                 return 1;
 883         }
 884         return 0;
 885 }
 886
 887 static const char * const cmd_label_usage[] = {
 888         "btrfs filesystem label [<device>|<mount_point>] [<newlabel>]",
 889         "Get or change the label of a filesystem",
 890         "With one argument, get the label of filesystem on <device>.",
 891         "If <newlabel> is passed, set the filesystem label to <newlabel>.",
 892         NULL
 893 };
 894
 895 static int cmd_label(int argc, char **argv)
 896 {
 897         if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
 898                 usage(cmd_label_usage);
 899
 900         if (argc > 2) {
 901                 return set_label(argv[1], argv[2]);
 902         } else {
 903                 char label[BTRFS_LABEL_SIZE];
 904                 int ret;
 905
 906                 ret = get_label(argv[1], label);
 907                 if (!ret)
 908                         fprintf(stdout, "%s\n", label);
 909
 910                 return ret;
 911         }
 912 }
 913
 914 const struct cmd_group filesystem_cmd_group = {
 915         filesystem_cmd_group_usage, NULL, {
 916                 { "df", cmd_df, cmd_df_usage, NULL, 0 },
 917                 { "show", cmd_show, cmd_show_usage, NULL, 0 },
 918                 { "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
 919                 { "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
 920                 { "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
 921                 { "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
 922                 { "label", cmd_label, cmd_label_usage, NULL, 0 },
 923                 NULL_CMD_STRUCT
 924         }
 925 };
 926
 927 int cmd_filesystem(int argc, char **argv)
 928 {
 929         return handle_command_group(&filesystem_cmd_group, argc, argv);
 930 }