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 -e;
 110         }
 111         /* This really should never happen */
 112         if (!sargs->total_spaces) {
 113                 free(sargs);
 114                 return -ENOENT;
 115         }
 116         count = sargs->total_spaces;
 117         free(sargs);
 118
 119         sargs = malloc(sizeof(struct btrfs_ioctl_space_args) +
 120                         (count * sizeof(struct btrfs_ioctl_space_info)));
 121         if (!sargs)
 122                 ret = -ENOMEM;
 123
 124         sargs->space_slots = count;
 125         sargs->total_spaces = 0;
 126         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
 127         e = errno;
 128         if (ret) {
 129                 fprintf(stderr, "ERROR: get space info count %llu - %s\n",
 130                                 count, strerror(e));
 131                 free(sargs);
 132                 return -e;
 133         }
 134         *sargs_ret = sargs;
 135         return 0;
 136 }
 137
 138 static void print_df(struct btrfs_ioctl_space_args *sargs)
 139 {
 140         u64 i;
 141         struct btrfs_ioctl_space_info *sp = sargs->spaces;
 142
 143         for (i = 0; i < sargs->total_spaces; i++, sp++) {
 144                 printf("%s, %s: total=%s, used=%s\n",
 145                         group_type_str(sp->flags),
 146                         group_profile_str(sp->flags),
 147                         pretty_size(sp->total_bytes),
 148                         pretty_size(sp->used_bytes));
 149         }
 150 }
 151
 152 static int cmd_df(int argc, char **argv)
 153 {
 154         struct btrfs_ioctl_space_args *sargs = NULL;
 155         int ret;
 156         int fd;
 157         char *path;
 158         DIR  *dirstream = NULL;
 159
 160         if (check_argc_exact(argc, 2))
 161                 usage(cmd_df_usage);
 162
 163         path = argv[1];
 164
 165         fd = open_file_or_dir(path, &dirstream);
 166         if (fd < 0) {
 167                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 168                 return 1;
 169         }
 170         ret = get_df(fd, &sargs);
 171
 172         if (!ret && sargs) {
 173                 print_df(sargs);
 174                 free(sargs);
 175         } else {
 176                 fprintf(stderr, "ERROR: get_df failed %s\n", strerror(ret));
 177         }
 178
 179         close_file_or_dir(fd, dirstream);
 180         return !!ret;
 181 }
 182
 183 static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
 184 {
 185         char uuidbuf[37];
 186         struct list_head *cur;
 187         struct btrfs_device *device;
 188         int search_len = strlen(search);
 189
 190         search_len = min(search_len, 37);
 191         uuid_unparse(fs_devices->fsid, uuidbuf);
 192         if (!strncmp(uuidbuf, search, search_len))
 193                 return 1;
 194
 195         list_for_each(cur, &fs_devices->devices) {
 196                 device = list_entry(cur, struct btrfs_device, dev_list);
 197                 if ((device->label && strcmp(device->label, search) == 0) ||
 198                     strcmp(device->name, search) == 0)
 199                         return 1;
 200         }
 201         return 0;
 202 }
 203
 204 /*
 205  * Sort devices by devid, ascending
 206  */
 207 static int cmp_device_id(void *priv, struct list_head *a,
 208                 struct list_head *b)
 209 {
 210         const struct btrfs_device *da = list_entry(a, struct btrfs_device,
 211                         dev_list);
 212         const struct btrfs_device *db = list_entry(b, struct btrfs_device,
 213                         dev_list);
 214
 215         return da->devid < db->devid ? -1 :
 216                 da->devid > db->devid ? 1 : 0;
 217 }
 218
 219 static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
 220 {
 221         char uuidbuf[37];
 222         struct list_head *cur;
 223         struct btrfs_device *device;
 224         u64 devs_found = 0;
 225         u64 total;
 226
 227         uuid_unparse(fs_devices->fsid, uuidbuf);
 228         device = list_entry(fs_devices->devices.next, struct btrfs_device,
 229                             dev_list);
 230         if (device->label && device->label[0])
 231                 printf("Label: '%s' ", device->label);
 232         else
 233                 printf("Label: none ");
 234
 235
 236         total = device->total_devs;
 237         printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
 238                (unsigned long long)total,
 239                pretty_size(device->super_bytes_used));
 240
 241         list_sort(NULL, &fs_devices->devices, cmp_device_id);
 242         list_for_each(cur, &fs_devices->devices) {
 243                 device = list_entry(cur, struct btrfs_device, dev_list);
 244
 245                 printf("\tdevid %4llu size %s used %s path %s\n",
 246                        (unsigned long long)device->devid,
 247                        pretty_size(device->total_bytes),
 248                        pretty_size(device->bytes_used), device->name);
 249
 250                 devs_found++;
 251         }
 252         if (devs_found < total) {
 253                 printf("\t*** Some devices missing\n");
 254         }
 255         printf("\n");
 256 }
 257
 258 /* adds up all the used spaces as reported by the space info ioctl
 259  */
 260 static u64 calc_used_bytes(struct btrfs_ioctl_space_args *si)
 261 {
 262         u64 ret = 0;
 263         int i;
 264         for (i = 0; i < si->total_spaces; i++)
 265                 ret += si->spaces[i].used_bytes;
 266         return ret;
 267 }
 268
 269 static int print_one_fs(struct btrfs_ioctl_fs_info_args *fs_info,
 270                 struct btrfs_ioctl_dev_info_args *dev_info,
 271                 struct btrfs_ioctl_space_args *space_info,
 272                 char *label, char *path)
 273 {
 274         int i;
 275         char uuidbuf[37];
 276         struct btrfs_ioctl_dev_info_args *tmp_dev_info;
 277
 278         uuid_unparse(fs_info->fsid, uuidbuf);
 279         printf("Label: %s  uuid: %s\n",
 280                 strlen(label) ? label : "none", uuidbuf);
 281
 282         printf("\tTotal devices %llu FS bytes used %s\n",
 283                                 fs_info->num_devices,
 284                         pretty_size(calc_used_bytes(space_info)));
 285
 286         for (i = 0; i < fs_info->num_devices; i++) {
 287                 tmp_dev_info = (struct btrfs_ioctl_dev_info_args *)&dev_info[i];
 288                 printf("\tdevid    %llu size %s used %s path %s\n",
 289                         tmp_dev_info->devid,
 290                         pretty_size(tmp_dev_info->total_bytes),
 291                         pretty_size(tmp_dev_info->bytes_used),
 292                         tmp_dev_info->path);
 293         }
 294
 295         printf("\n");
 296         return 0;
 297 }
 298
 299 /* This function checks if the given input parameter is
 300  * an uuid or a path
 301  * return -1: some error in the given input
 302  * return 0: unknow input
 303  * return 1: given input is uuid
 304  * return 2: given input is path
 305  */
 306 static int check_arg_type(char *input)
 307 {
 308         uuid_t  out;
 309         char path[PATH_MAX];
 310
 311         if (!input)
 312                 return BTRFS_ARG_UNKNOWN;
 313
 314         if (realpath(input, path)) {
 315                 if (is_block_device(input) == 1)
 316                         return BTRFS_ARG_BLKDEV;
 317
 318                 if (is_mount_point(input) == 1)
 319                         return BTRFS_ARG_MNTPOINT;
 320
 321                 return BTRFS_ARG_UNKNOWN;
 322         }
 323
 324         if (!uuid_parse(input, out))
 325                 return BTRFS_ARG_UUID;
 326
 327         return BTRFS_ARG_UNKNOWN;
 328 }
 329
 330 static int btrfs_scan_kernel(void *search)
 331 {
 332         int ret = 0, fd, type;
 333         FILE *f;
 334         struct mntent *mnt;
 335         struct btrfs_ioctl_fs_info_args fs_info_arg;
 336         struct btrfs_ioctl_dev_info_args *dev_info_arg = NULL;
 337         struct btrfs_ioctl_space_args *space_info_arg;
 338         char label[BTRFS_LABEL_SIZE];
 339         uuid_t uuid;
 340
 341         f = setmntent("/proc/self/mounts", "r");
 342         if (f == NULL)
 343                 return 1;
 344
 345         type = check_arg_type(search);
 346         if (type == BTRFS_ARG_BLKDEV)
 347                 return 1;
 348
 349         while ((mnt = getmntent(f)) != NULL) {
 350                 if (strcmp(mnt->mnt_type, "btrfs"))
 351                         continue;
 352                 ret = get_fs_info(mnt->mnt_dir, &fs_info_arg,
 353                                 &dev_info_arg);
 354                 if (ret)
 355                         return ret;
 356
 357                 switch (type) {
 358                 case BTRFS_ARG_UUID:
 359                         ret = uuid_parse(search, uuid);
 360                         if (ret)
 361                                 return 1;
 362                         if (uuid_compare(fs_info_arg.fsid, uuid))
 363                                 continue;
 364                         break;
 365                 case BTRFS_ARG_MNTPOINT:
 366                         if (strcmp(search, mnt->mnt_dir))
 367                                 continue;
 368                         break;
 369                 case BTRFS_ARG_UNKNOWN:
 370                         break;
 371                 }
 372
 373                 fd = open(mnt->mnt_dir, O_RDONLY);
 374                 if ((fd != -1) && !get_df(fd, &space_info_arg)) {
 375                         get_label_mounted(mnt->mnt_dir, label);
 376                         print_one_fs(&fs_info_arg, dev_info_arg,
 377                                         space_info_arg, label, mnt->mnt_dir);
 378                         free(space_info_arg);
 379                 }
 380                 if (fd != -1)
 381                         close(fd);
 382                 free(dev_info_arg);
 383         }
 384         return ret;
 385 }
 386
 387 static const char * const cmd_show_usage[] = {
 388         "btrfs filesystem show [options|<path>|<uuid>]",
 389         "Show the structure of a filesystem",
 390         "-d|--all-devices   show only disks under /dev containing btrfs filesystem",
 391         "-m|--mounted       show only mounted btrfs",
 392         "If no argument is given, structure of all present filesystems is shown.",
 393         NULL
 394 };
 395
 396 static int cmd_show(int argc, char **argv)
 397 {
 398         struct list_head *all_uuids;
 399         struct btrfs_fs_devices *fs_devices;
 400         struct list_head *cur_uuid;
 401         char *search = NULL;
 402         int ret;
 403         int where = BTRFS_SCAN_LBLKID;
 404         int type = 0;
 405         char mp[BTRFS_PATH_NAME_MAX + 1];
 406
 407         while (1) {
 408                 int long_index;
 409                 static struct option long_options[] = {
 410                         { "all-devices", no_argument, NULL, 'd'},
 411                         { "mounted", no_argument, NULL, 'm'},
 412                         { NULL, no_argument, NULL, 0 },
 413                 };
 414                 int c = getopt_long(argc, argv, "dm", long_options,
 415                                         &long_index);
 416                 if (c < 0)
 417                         break;
 418                 switch (c) {
 419                 case 'd':
 420                         where = BTRFS_SCAN_DEV;
 421                         break;
 422                 case 'm':
 423                         where = BTRFS_SCAN_MOUNTED;
 424                         break;
 425                 default:
 426                         usage(cmd_show_usage);
 427                 }
 428         }
 429
 430         if (where == BTRFS_SCAN_LBLKID) {
 431                 if (check_argc_max(argc, optind + 1))
 432                         usage(cmd_show_usage);
 433         } else {
 434                 if (check_argc_max(argc, optind))
 435                         usage(cmd_show_usage);
 436         }
 437         if (argc > optind) {
 438                 search = argv[optind];
 439                 type = check_arg_type(search);
 440                 if (type == BTRFS_ARG_UNKNOWN) {
 441                         fprintf(stderr, "ERROR: arg type unknown\n");
 442                         usage(cmd_show_usage);
 443                 }
 444                 if (type == BTRFS_ARG_BLKDEV) {
 445                         ret = get_btrfs_mount(search, mp, sizeof(mp));
 446                         if (ret == 0)
 447                                 search = mp;
 448                 }
 449         }
 450
 451         if (where == BTRFS_SCAN_DEV)
 452                 goto devs_only;
 453
 454         /* show mounted btrfs */
 455         btrfs_scan_kernel(search);
 456
 457         /* shows mounted only */
 458         if (where == BTRFS_SCAN_MOUNTED)
 459                 goto out;
 460
 461 devs_only:
 462         ret = scan_for_btrfs(where, !BTRFS_UPDATE_KERNEL);
 463
 464         if (ret) {
 465                 fprintf(stderr, "ERROR: %d while scanning\n", ret);
 466                 return 1;
 467         }
 468
 469         all_uuids = btrfs_scanned_uuids();
 470         list_for_each(cur_uuid, all_uuids) {
 471                 fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
 472                                         list);
 473                 if (search && uuid_search(fs_devices, search) == 0)
 474                         continue;
 475
 476                 print_one_uuid(fs_devices);
 477         }
 478
 479 out:
 480         printf("%s\n", BTRFS_BUILD_VERSION);
 481         return 0;
 482 }
 483
 484 static const char * const cmd_sync_usage[] = {
 485         "btrfs filesystem sync <path>",
 486         "Force a sync on a filesystem",
 487         NULL
 488 };
 489
 490 static int cmd_sync(int argc, char **argv)
 491 {
 492         int     fd, res, e;
 493         char    *path;
 494         DIR     *dirstream = NULL;
 495
 496         if (check_argc_exact(argc, 2))
 497                 usage(cmd_sync_usage);
 498
 499         path = argv[1];
 500
 501         fd = open_file_or_dir(path, &dirstream);
 502         if (fd < 0) {
 503                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 504                 return 1;
 505         }
 506
 507         printf("FSSync '%s'\n", path);
 508         res = ioctl(fd, BTRFS_IOC_SYNC);
 509         e = errno;
 510         close_file_or_dir(fd, dirstream);
 511         if( res < 0 ){
 512                 fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
 513                         path, strerror(e));
 514                 return 1;
 515         }
 516
 517         return 0;
 518 }
 519
 520 static int parse_compress_type(char *s)
 521 {
 522         if (strcmp(optarg, "zlib") == 0)
 523                 return BTRFS_COMPRESS_ZLIB;
 524         else if (strcmp(optarg, "lzo") == 0)
 525                 return BTRFS_COMPRESS_LZO;
 526         else {
 527                 fprintf(stderr, "Unknown compress type %s\n", s);
 528                 exit(1);
 529         };
 530 }
 531
 532 static const char * const cmd_defrag_usage[] = {
 533         "btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
 534         "Defragment a file or a directory",
 535         "",
 536         "-v             be verbose",
 537         "-r             defragment files recursively",
 538         "-c[zlib,lzo]   compress the file while defragmenting",
 539         "-f             flush data to disk immediately after defragmenting",
 540         "-s start       defragment only from byte onward",
 541         "-l len         defragment only up to len bytes",
 542         "-t size        minimal size of file to be considered for defragmenting",
 543         NULL
 544 };
 545
 546 static int do_defrag(int fd, int fancy_ioctl,
 547                 struct btrfs_ioctl_defrag_range_args *range)
 548 {
 549         int ret;
 550
 551         if (!fancy_ioctl)
 552                 ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
 553         else
 554                 ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, range);
 555
 556         return ret;
 557 }
 558
 559 static int defrag_global_fancy_ioctl;
 560 static struct btrfs_ioctl_defrag_range_args defrag_global_range;
 561 static int defrag_global_verbose;
 562 static int defrag_global_errors;
 563 static int defrag_callback(const char *fpath, const struct stat *sb,
 564                 int typeflag, struct FTW *ftwbuf)
 565 {
 566         int ret = 0;
 567         int e = 0;
 568         int fd = 0;
 569
 570         if (typeflag == FTW_F) {
 571                 if (defrag_global_verbose)
 572                         printf("%s\n", fpath);
 573                 fd = open(fpath, O_RDWR);
 574                 e = errno;
 575                 if (fd < 0)
 576                         goto error;
 577                 ret = do_defrag(fd, defrag_global_fancy_ioctl, &defrag_global_range);
 578                 e = errno;
 579                 close(fd);
 580                 if (ret && e == ENOTTY) {
 581                         fprintf(stderr, "ERROR: defrag range ioctl not "
 582                                 "supported in this kernel, please try "
 583                                 "without any options.\n");
 584                         defrag_global_errors++;
 585                         return ENOTTY;
 586                 }
 587                 if (ret)
 588                         goto error;
 589         }
 590         return 0;
 591
 592 error:
 593         fprintf(stderr, "ERROR: defrag failed on %s - %s\n", fpath, strerror(e));
 594         defrag_global_errors++;
 595         return 0;
 596 }
 597
 598 static int cmd_defrag(int argc, char **argv)
 599 {
 600         int fd;
 601         int flush = 0;
 602         u64 start = 0;
 603         u64 len = (u64)-1;
 604         u32 thresh = 0;
 605         int i;
 606         int recursive = 0;
 607         int ret = 0;
 608         struct btrfs_ioctl_defrag_range_args range;
 609         int e = 0;
 610         int compress_type = BTRFS_COMPRESS_NONE;
 611         DIR *dirstream;
 612
 613         defrag_global_errors = 0;
 614         defrag_global_verbose = 0;
 615         defrag_global_errors = 0;
 616         defrag_global_fancy_ioctl = 0;
 617         optind = 1;
 618         while(1) {
 619                 int c = getopt(argc, argv, "vrc::fs:l:t:");
 620                 if (c < 0)
 621                         break;
 622
 623                 switch(c) {
 624                 case 'c':
 625                         compress_type = BTRFS_COMPRESS_ZLIB;
 626                         if (optarg)
 627                                 compress_type = parse_compress_type(optarg);
 628                         defrag_global_fancy_ioctl = 1;
 629                         break;
 630                 case 'f':
 631                         flush = 1;
 632                         defrag_global_fancy_ioctl = 1;
 633                         break;
 634                 case 'v':
 635                         defrag_global_verbose = 1;
 636                         break;
 637                 case 's':
 638                         start = parse_size(optarg);
 639                         defrag_global_fancy_ioctl = 1;
 640                         break;
 641                 case 'l':
 642                         len = parse_size(optarg);
 643                         defrag_global_fancy_ioctl = 1;
 644                         break;
 645                 case 't':
 646                         thresh = parse_size(optarg);
 647                         defrag_global_fancy_ioctl = 1;
 648                         break;
 649                 case 'r':
 650                         recursive = 1;
 651                         break;
 652                 default:
 653                         usage(cmd_defrag_usage);
 654                 }
 655         }
 656
 657         if (check_argc_min(argc - optind, 1))
 658                 usage(cmd_defrag_usage);
 659
 660         memset(&defrag_global_range, 0, sizeof(range));
 661         defrag_global_range.start = start;
 662         defrag_global_range.len = len;
 663         defrag_global_range.extent_thresh = thresh;
 664         if (compress_type) {
 665                 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
 666                 defrag_global_range.compress_type = compress_type;
 667         }
 668         if (flush)
 669                 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
 670
 671         for (i = optind; i < argc; i++) {
 672                 dirstream = NULL;
 673                 fd = open_file_or_dir(argv[i], &dirstream);
 674                 if (fd < 0) {
 675                         fprintf(stderr, "ERROR: failed to open %s - %s\n", argv[i],
 676                                         strerror(errno));
 677                         defrag_global_errors++;
 678                         close_file_or_dir(fd, dirstream);
 679                         continue;
 680                 }
 681                 if (recursive) {
 682                         struct stat st;
 683
 684                         fstat(fd, &st);
 685                         if (S_ISDIR(st.st_mode)) {
 686                                 ret = nftw(argv[i], defrag_callback, 10,
 687                                                 FTW_MOUNT | FTW_PHYS);
 688                                 if (ret == ENOTTY)
 689                                         exit(1);
 690                                 /* errors are handled in the callback */
 691                                 ret = 0;
 692                         } else {
 693                                 if (defrag_global_verbose)
 694                                         printf("%s\n", argv[i]);
 695                                 ret = do_defrag(fd, defrag_global_fancy_ioctl,
 696                                                 &defrag_global_range);
 697                                 e = errno;
 698                         }
 699                 } else {
 700                         if (defrag_global_verbose)
 701                                 printf("%s\n", argv[i]);
 702                         ret = do_defrag(fd, defrag_global_fancy_ioctl,
 703                                         &defrag_global_range);
 704                         e = errno;
 705                 }
 706                 close_file_or_dir(fd, dirstream);
 707                 if (ret && e == ENOTTY) {
 708                         fprintf(stderr, "ERROR: defrag range ioctl not "
 709                                 "supported in this kernel, please try "
 710                                 "without any options.\n");
 711                         defrag_global_errors++;
 712                         break;
 713                 }
 714                 if (ret) {
 715                         fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
 716                                 argv[i], strerror(e));
 717                         defrag_global_errors++;
 718                 }
 719         }
 720         if (defrag_global_verbose)
 721                 printf("%s\n", BTRFS_BUILD_VERSION);
 722         if (defrag_global_errors)
 723                 fprintf(stderr, "total %d failures\n", defrag_global_errors);
 724
 725         return !!defrag_global_errors;
 726 }
 727
 728 static const char * const cmd_resize_usage[] = {
 729         "btrfs filesystem resize [devid:][+/-]<newsize>[gkm]|[devid:]max <path>",
 730         "Resize a filesystem",
 731         "If 'max' is passed, the filesystem will occupy all available space",
 732         "on the device 'devid'.",
 733         NULL
 734 };
 735
 736 static int cmd_resize(int argc, char **argv)
 737 {
 738         struct btrfs_ioctl_vol_args     args;
 739         int     fd, res, len, e;
 740         char    *amount, *path;
 741         DIR     *dirstream = NULL;
 742
 743         if (check_argc_exact(argc, 3))
 744                 usage(cmd_resize_usage);
 745
 746         amount = argv[1];
 747         path = argv[2];
 748
 749         len = strlen(amount);
 750         if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
 751                 fprintf(stderr, "ERROR: size value too long ('%s)\n",
 752                         amount);
 753                 return 1;
 754         }
 755
 756         fd = open_file_or_dir(path, &dirstream);
 757         if (fd < 0) {
 758                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 759                 return 1;
 760         }
 761
 762         printf("Resize '%s' of '%s'\n", path, amount);
 763         strncpy_null(args.name, amount);
 764         res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
 765         e = errno;
 766         close_file_or_dir(fd, dirstream);
 767         if( res < 0 ){
 768                 fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
 769                         path, strerror(e));
 770                 return 1;
 771         }
 772         return 0;
 773 }
 774
 775 static const char * const cmd_label_usage[] = {
 776         "btrfs filesystem label [<device>|<mount_point>] [<newlabel>]",
 777         "Get or change the label of a filesystem",
 778         "With one argument, get the label of filesystem on <device>.",
 779         "If <newlabel> is passed, set the filesystem label to <newlabel>.",
 780         NULL
 781 };
 782
 783 static int cmd_label(int argc, char **argv)
 784 {
 785         if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
 786                 usage(cmd_label_usage);
 787
 788         if (argc > 2)
 789                 return set_label(argv[1], argv[2]);
 790         else
 791                 return get_label(argv[1]);
 792 }
 793
 794 const struct cmd_group filesystem_cmd_group = {
 795         filesystem_cmd_group_usage, NULL, {
 796                 { "df", cmd_df, cmd_df_usage, NULL, 0 },
 797                 { "show", cmd_show, cmd_show_usage, NULL, 0 },
 798                 { "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
 799                 { "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
 800                 { "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
 801                 { "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
 802                 { "label", cmd_label, cmd_label_usage, NULL, 0 },
 803                 NULL_CMD_STRUCT
 804         }
 805 };
 806
 807 int cmd_filesystem(int argc, char **argv)
 808 {
 809         return handle_command_group(&filesystem_cmd_group, argc, argv);
 810 }