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