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 uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
 252 {
 253         char uuidbuf[37];
 254         struct list_head *cur;
 255         struct btrfs_device *device;
 256         int search_len = strlen(search);
 257
 258         search_len = min(search_len, 37);
 259         uuid_unparse(fs_devices->fsid, uuidbuf);
 260         if (!strncmp(uuidbuf, search, search_len))
 261                 return 1;
 262
 263         list_for_each(cur, &fs_devices->devices) {
 264                 device = list_entry(cur, struct btrfs_device, dev_list);
 265                 if ((device->label && strcmp(device->label, search) == 0) ||
 266                     strcmp(device->name, search) == 0)
 267                         return 1;
 268         }
 269         return 0;
 270 }
 271
 272 /*
 273  * Sort devices by devid, ascending
 274  */
 275 static int cmp_device_id(void *priv, struct list_head *a,
 276                 struct list_head *b)
 277 {
 278         const struct btrfs_device *da = list_entry(a, struct btrfs_device,
 279                         dev_list);
 280         const struct btrfs_device *db = list_entry(b, struct btrfs_device,
 281                         dev_list);
 282
 283         return da->devid < db->devid ? -1 :
 284                 da->devid > db->devid ? 1 : 0;
 285 }
 286
 287 static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
 288 {
 289         char uuidbuf[37];
 290         struct list_head *cur;
 291         struct btrfs_device *device;
 292         u64 devs_found = 0;
 293         u64 total;
 294
 295         if (add_seen_fsid(fs_devices->fsid))
 296                 return;
 297
 298         uuid_unparse(fs_devices->fsid, uuidbuf);
 299         device = list_entry(fs_devices->devices.next, struct btrfs_device,
 300                             dev_list);
 301         if (device->label && device->label[0])
 302                 printf("Label: '%s' ", device->label);
 303         else
 304                 printf("Label: none ");
 305
 306
 307         total = device->total_devs;
 308         printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
 309                (unsigned long long)total,
 310                pretty_size(device->super_bytes_used));
 311
 312         list_sort(NULL, &fs_devices->devices, cmp_device_id);
 313         list_for_each(cur, &fs_devices->devices) {
 314                 device = list_entry(cur, struct btrfs_device, dev_list);
 315
 316                 printf("\tdevid %4llu size %s used %s path %s\n",
 317                        (unsigned long long)device->devid,
 318                        pretty_size(device->total_bytes),
 319                        pretty_size(device->bytes_used), device->name);
 320
 321                 devs_found++;
 322         }
 323         if (devs_found < total) {
 324                 printf("\t*** Some devices missing\n");
 325         }
 326         printf("\n");
 327 }
 328
 329 /* adds up all the used spaces as reported by the space info ioctl
 330  */
 331 static u64 calc_used_bytes(struct btrfs_ioctl_space_args *si)
 332 {
 333         u64 ret = 0;
 334         int i;
 335         for (i = 0; i < si->total_spaces; i++)
 336                 ret += si->spaces[i].used_bytes;
 337         return ret;
 338 }
 339
 340 static int print_one_fs(struct btrfs_ioctl_fs_info_args *fs_info,
 341                 struct btrfs_ioctl_dev_info_args *dev_info,
 342                 struct btrfs_ioctl_space_args *space_info,
 343                 char *label, char *path)
 344 {
 345         int i;
 346         char uuidbuf[37];
 347         struct btrfs_ioctl_dev_info_args *tmp_dev_info;
 348         int ret;
 349
 350         ret = add_seen_fsid(fs_info->fsid);
 351         if (ret == -EEXIST)
 352                 return 0;
 353         else if (ret)
 354                 return ret;
 355
 356         uuid_unparse(fs_info->fsid, uuidbuf);
 357         printf("Label: %s  uuid: %s\n",
 358                 strlen(label) ? label : "none", uuidbuf);
 359
 360         printf("\tTotal devices %llu FS bytes used %s\n",
 361                                 fs_info->num_devices,
 362                         pretty_size(calc_used_bytes(space_info)));
 363
 364         for (i = 0; i < fs_info->num_devices; i++) {
 365                 tmp_dev_info = (struct btrfs_ioctl_dev_info_args *)&dev_info[i];
 366                 printf("\tdevid    %llu size %s used %s path %s\n",
 367                         tmp_dev_info->devid,
 368                         pretty_size(tmp_dev_info->total_bytes),
 369                         pretty_size(tmp_dev_info->bytes_used),
 370                         tmp_dev_info->path);
 371         }
 372
 373         printf("\n");
 374         return 0;
 375 }
 376
 377 /* This function checks if the given input parameter is
 378  * an uuid or a path
 379  * return -1: some error in the given input
 380  * return 0: unknow input
 381  * return 1: given input is uuid
 382  * return 2: given input is path
 383  */
 384 static int check_arg_type(char *input)
 385 {
 386         uuid_t  out;
 387         char path[PATH_MAX];
 388
 389         if (!input)
 390                 return BTRFS_ARG_UNKNOWN;
 391
 392         if (realpath(input, path)) {
 393                 if (is_block_device(input) == 1)
 394                         return BTRFS_ARG_BLKDEV;
 395
 396                 if (is_mount_point(input) == 1)
 397                         return BTRFS_ARG_MNTPOINT;
 398
 399                 return BTRFS_ARG_UNKNOWN;
 400         }
 401
 402         if (!uuid_parse(input, out))
 403                 return BTRFS_ARG_UUID;
 404
 405         return BTRFS_ARG_UNKNOWN;
 406 }
 407
 408 static int btrfs_scan_kernel(void *search)
 409 {
 410         int ret = 0, fd, type;
 411         FILE *f;
 412         struct mntent *mnt;
 413         struct btrfs_ioctl_fs_info_args fs_info_arg;
 414         struct btrfs_ioctl_dev_info_args *dev_info_arg = NULL;
 415         struct btrfs_ioctl_space_args *space_info_arg;
 416         char label[BTRFS_LABEL_SIZE];
 417         uuid_t uuid;
 418
 419         f = setmntent("/proc/self/mounts", "r");
 420         if (f == NULL)
 421                 return 1;
 422
 423         type = check_arg_type(search);
 424         if (type == BTRFS_ARG_BLKDEV)
 425                 return 1;
 426
 427         while ((mnt = getmntent(f)) != NULL) {
 428                 if (strcmp(mnt->mnt_type, "btrfs"))
 429                         continue;
 430                 ret = get_fs_info(mnt->mnt_dir, &fs_info_arg,
 431                                 &dev_info_arg);
 432                 if (ret)
 433                         return ret;
 434
 435                 switch (type) {
 436                 case BTRFS_ARG_UUID:
 437                         ret = uuid_parse(search, uuid);
 438                         if (ret)
 439                                 return 1;
 440                         if (uuid_compare(fs_info_arg.fsid, uuid))
 441                                 continue;
 442                         break;
 443                 case BTRFS_ARG_MNTPOINT:
 444                         if (strcmp(search, mnt->mnt_dir))
 445                                 continue;
 446                         break;
 447                 case BTRFS_ARG_UNKNOWN:
 448                         break;
 449                 }
 450
 451                 fd = open(mnt->mnt_dir, O_RDONLY);
 452                 if ((fd != -1) && !get_df(fd, &space_info_arg)) {
 453                         get_label_mounted(mnt->mnt_dir, label);
 454                         print_one_fs(&fs_info_arg, dev_info_arg,
 455                                         space_info_arg, label, mnt->mnt_dir);
 456                         free(space_info_arg);
 457                 }
 458                 if (fd != -1)
 459                         close(fd);
 460                 free(dev_info_arg);
 461         }
 462         return ret;
 463 }
 464
 465 static const char * const cmd_show_usage[] = {
 466         "btrfs filesystem show [options|<path>|<uuid>]",
 467         "Show the structure of a filesystem",
 468         "-d|--all-devices   show only disks under /dev containing btrfs filesystem",
 469         "-m|--mounted       show only mounted btrfs",
 470         "If no argument is given, structure of all present filesystems is shown.",
 471         NULL
 472 };
 473
 474 static int cmd_show(int argc, char **argv)
 475 {
 476         struct list_head *all_uuids;
 477         struct btrfs_fs_devices *fs_devices;
 478         struct list_head *cur_uuid;
 479         char *search = NULL;
 480         int ret;
 481         int where = BTRFS_SCAN_LBLKID;
 482         int type = 0;
 483         char mp[BTRFS_PATH_NAME_MAX + 1];
 484
 485         while (1) {
 486                 int long_index;
 487                 static struct option long_options[] = {
 488                         { "all-devices", no_argument, NULL, 'd'},
 489                         { "mounted", no_argument, NULL, 'm'},
 490                         { NULL, no_argument, NULL, 0 },
 491                 };
 492                 int c = getopt_long(argc, argv, "dm", long_options,
 493                                         &long_index);
 494                 if (c < 0)
 495                         break;
 496                 switch (c) {
 497                 case 'd':
 498                         where = BTRFS_SCAN_DEV;
 499                         break;
 500                 case 'm':
 501                         where = BTRFS_SCAN_MOUNTED;
 502                         break;
 503                 default:
 504                         usage(cmd_show_usage);
 505                 }
 506         }
 507
 508         if (where == BTRFS_SCAN_LBLKID) {
 509                 if (check_argc_max(argc, optind + 1))
 510                         usage(cmd_show_usage);
 511         } else {
 512                 if (check_argc_max(argc, optind))
 513                         usage(cmd_show_usage);
 514         }
 515         if (argc > optind) {
 516                 search = argv[optind];
 517                 type = check_arg_type(search);
 518                 if (type == BTRFS_ARG_UNKNOWN) {
 519                         fprintf(stderr, "ERROR: arg type unknown\n");
 520                         usage(cmd_show_usage);
 521                 }
 522                 if (type == BTRFS_ARG_BLKDEV) {
 523                         ret = get_btrfs_mount(search, mp, sizeof(mp));
 524                         if (ret == 0)
 525                                 search = mp;
 526                 }
 527         }
 528
 529         if (where == BTRFS_SCAN_DEV)
 530                 goto devs_only;
 531
 532         /* show mounted btrfs */
 533         btrfs_scan_kernel(search);
 534
 535         /* shows mounted only */
 536         if (where == BTRFS_SCAN_MOUNTED)
 537                 goto out;
 538
 539 devs_only:
 540         ret = scan_for_btrfs(where, !BTRFS_UPDATE_KERNEL);
 541
 542         if (ret) {
 543                 fprintf(stderr, "ERROR: %d while scanning\n", ret);
 544                 return 1;
 545         }
 546
 547         all_uuids = btrfs_scanned_uuids();
 548         list_for_each(cur_uuid, all_uuids) {
 549                 fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
 550                                         list);
 551                 if (search && uuid_search(fs_devices, search) == 0)
 552                         continue;
 553
 554                 print_one_uuid(fs_devices);
 555         }
 556
 557 out:
 558         printf("%s\n", BTRFS_BUILD_VERSION);
 559         free_seen_fsid();
 560         return 0;
 561 }
 562
 563 static const char * const cmd_sync_usage[] = {
 564         "btrfs filesystem sync <path>",
 565         "Force a sync on a filesystem",
 566         NULL
 567 };
 568
 569 static int cmd_sync(int argc, char **argv)
 570 {
 571         int     fd, res, e;
 572         char    *path;
 573         DIR     *dirstream = NULL;
 574
 575         if (check_argc_exact(argc, 2))
 576                 usage(cmd_sync_usage);
 577
 578         path = argv[1];
 579
 580         fd = open_file_or_dir(path, &dirstream);
 581         if (fd < 0) {
 582                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 583                 return 1;
 584         }
 585
 586         printf("FSSync '%s'\n", path);
 587         res = ioctl(fd, BTRFS_IOC_SYNC);
 588         e = errno;
 589         close_file_or_dir(fd, dirstream);
 590         if( res < 0 ){
 591                 fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
 592                         path, strerror(e));
 593                 return 1;
 594         }
 595
 596         return 0;
 597 }
 598
 599 static int parse_compress_type(char *s)
 600 {
 601         if (strcmp(optarg, "zlib") == 0)
 602                 return BTRFS_COMPRESS_ZLIB;
 603         else if (strcmp(optarg, "lzo") == 0)
 604                 return BTRFS_COMPRESS_LZO;
 605         else {
 606                 fprintf(stderr, "Unknown compress type %s\n", s);
 607                 exit(1);
 608         };
 609 }
 610
 611 static const char * const cmd_defrag_usage[] = {
 612         "btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
 613         "Defragment a file or a directory",
 614         "",
 615         "-v             be verbose",
 616         "-r             defragment files recursively",
 617         "-c[zlib,lzo]   compress the file while defragmenting",
 618         "-f             flush data to disk immediately after defragmenting",
 619         "-s start       defragment only from byte onward",
 620         "-l len         defragment only up to len bytes",
 621         "-t size        minimal size of file to be considered for defragmenting",
 622         NULL
 623 };
 624
 625 static int do_defrag(int fd, int fancy_ioctl,
 626                 struct btrfs_ioctl_defrag_range_args *range)
 627 {
 628         int ret;
 629
 630         if (!fancy_ioctl)
 631                 ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
 632         else
 633                 ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, range);
 634
 635         return ret;
 636 }
 637
 638 static int defrag_global_fancy_ioctl;
 639 static struct btrfs_ioctl_defrag_range_args defrag_global_range;
 640 static int defrag_global_verbose;
 641 static int defrag_global_errors;
 642 static int defrag_callback(const char *fpath, const struct stat *sb,
 643                 int typeflag, struct FTW *ftwbuf)
 644 {
 645         int ret = 0;
 646         int e = 0;
 647         int fd = 0;
 648
 649         if (typeflag == FTW_F) {
 650                 if (defrag_global_verbose)
 651                         printf("%s\n", fpath);
 652                 fd = open(fpath, O_RDWR);
 653                 e = errno;
 654                 if (fd < 0)
 655                         goto error;
 656                 ret = do_defrag(fd, defrag_global_fancy_ioctl, &defrag_global_range);
 657                 e = errno;
 658                 close(fd);
 659                 if (ret && e == ENOTTY) {
 660                         fprintf(stderr, "ERROR: defrag range ioctl not "
 661                                 "supported in this kernel, please try "
 662                                 "without any options.\n");
 663                         defrag_global_errors++;
 664                         return ENOTTY;
 665                 }
 666                 if (ret)
 667                         goto error;
 668         }
 669         return 0;
 670
 671 error:
 672         fprintf(stderr, "ERROR: defrag failed on %s - %s\n", fpath, strerror(e));
 673         defrag_global_errors++;
 674         return 0;
 675 }
 676
 677 static int cmd_defrag(int argc, char **argv)
 678 {
 679         int fd;
 680         int flush = 0;
 681         u64 start = 0;
 682         u64 len = (u64)-1;
 683         u32 thresh = 0;
 684         int i;
 685         int recursive = 0;
 686         int ret = 0;
 687         struct btrfs_ioctl_defrag_range_args range;
 688         int e = 0;
 689         int compress_type = BTRFS_COMPRESS_NONE;
 690         DIR *dirstream;
 691
 692         defrag_global_errors = 0;
 693         defrag_global_verbose = 0;
 694         defrag_global_errors = 0;
 695         defrag_global_fancy_ioctl = 0;
 696         optind = 1;
 697         while(1) {
 698                 int c = getopt(argc, argv, "vrc::fs:l:t:");
 699                 if (c < 0)
 700                         break;
 701
 702                 switch(c) {
 703                 case 'c':
 704                         compress_type = BTRFS_COMPRESS_ZLIB;
 705                         if (optarg)
 706                                 compress_type = parse_compress_type(optarg);
 707                         defrag_global_fancy_ioctl = 1;
 708                         break;
 709                 case 'f':
 710                         flush = 1;
 711                         defrag_global_fancy_ioctl = 1;
 712                         break;
 713                 case 'v':
 714                         defrag_global_verbose = 1;
 715                         break;
 716                 case 's':
 717                         start = parse_size(optarg);
 718                         defrag_global_fancy_ioctl = 1;
 719                         break;
 720                 case 'l':
 721                         len = parse_size(optarg);
 722                         defrag_global_fancy_ioctl = 1;
 723                         break;
 724                 case 't':
 725                         thresh = parse_size(optarg);
 726                         defrag_global_fancy_ioctl = 1;
 727                         break;
 728                 case 'r':
 729                         recursive = 1;
 730                         break;
 731                 default:
 732                         usage(cmd_defrag_usage);
 733                 }
 734         }
 735
 736         if (check_argc_min(argc - optind, 1))
 737                 usage(cmd_defrag_usage);
 738
 739         memset(&defrag_global_range, 0, sizeof(range));
 740         defrag_global_range.start = start;
 741         defrag_global_range.len = len;
 742         defrag_global_range.extent_thresh = thresh;
 743         if (compress_type) {
 744                 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
 745                 defrag_global_range.compress_type = compress_type;
 746         }
 747         if (flush)
 748                 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
 749
 750         for (i = optind; i < argc; i++) {
 751                 dirstream = NULL;
 752                 fd = open_file_or_dir(argv[i], &dirstream);
 753                 if (fd < 0) {
 754                         fprintf(stderr, "ERROR: failed to open %s - %s\n", argv[i],
 755                                         strerror(errno));
 756                         defrag_global_errors++;
 757                         close_file_or_dir(fd, dirstream);
 758                         continue;
 759                 }
 760                 if (recursive) {
 761                         struct stat st;
 762
 763                         if (fstat(fd, &st)) {
 764                                 fprintf(stderr, "ERROR: failed to stat %s - %s\n",
 765                                                 argv[i], strerror(errno));
 766                                 defrag_global_errors++;
 767                                 close_file_or_dir(fd, dirstream);
 768                                 continue;
 769                         }
 770                         if (S_ISDIR(st.st_mode)) {
 771                                 ret = nftw(argv[i], defrag_callback, 10,
 772                                                 FTW_MOUNT | FTW_PHYS);
 773                                 if (ret == ENOTTY)
 774                                         exit(1);
 775                                 /* errors are handled in the callback */
 776                                 ret = 0;
 777                         } else {
 778                                 if (defrag_global_verbose)
 779                                         printf("%s\n", argv[i]);
 780                                 ret = do_defrag(fd, defrag_global_fancy_ioctl,
 781                                                 &defrag_global_range);
 782                                 e = errno;
 783                         }
 784                 } else {
 785                         if (defrag_global_verbose)
 786                                 printf("%s\n", argv[i]);
 787                         ret = do_defrag(fd, defrag_global_fancy_ioctl,
 788                                         &defrag_global_range);
 789                         e = errno;
 790                 }
 791                 close_file_or_dir(fd, dirstream);
 792                 if (ret && e == ENOTTY) {
 793                         fprintf(stderr, "ERROR: defrag range ioctl not "
 794                                 "supported in this kernel, please try "
 795                                 "without any options.\n");
 796                         defrag_global_errors++;
 797                         break;
 798                 }
 799                 if (ret) {
 800                         fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
 801                                 argv[i], strerror(e));
 802                         defrag_global_errors++;
 803                 }
 804         }
 805         if (defrag_global_verbose)
 806                 printf("%s\n", BTRFS_BUILD_VERSION);
 807         if (defrag_global_errors)
 808                 fprintf(stderr, "total %d failures\n", defrag_global_errors);
 809
 810         return !!defrag_global_errors;
 811 }
 812
 813 static const char * const cmd_resize_usage[] = {
 814         "btrfs filesystem resize [devid:][+/-]<newsize>[gkm]|[devid:]max <path>",
 815         "Resize a filesystem",
 816         "If 'max' is passed, the filesystem will occupy all available space",
 817         "on the device 'devid'.",
 818         NULL
 819 };
 820
 821 static int cmd_resize(int argc, char **argv)
 822 {
 823         struct btrfs_ioctl_vol_args     args;
 824         int     fd, res, len, e;
 825         char    *amount, *path;
 826         DIR     *dirstream = NULL;
 827
 828         if (check_argc_exact(argc, 3))
 829                 usage(cmd_resize_usage);
 830
 831         amount = argv[1];
 832         path = argv[2];
 833
 834         len = strlen(amount);
 835         if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
 836                 fprintf(stderr, "ERROR: size value too long ('%s)\n",
 837                         amount);
 838                 return 1;
 839         }
 840
 841         fd = open_file_or_dir(path, &dirstream);
 842         if (fd < 0) {
 843                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 844                 return 1;
 845         }
 846
 847         printf("Resize '%s' of '%s'\n", path, amount);
 848         strncpy_null(args.name, amount);
 849         res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
 850         e = errno;
 851         close_file_or_dir(fd, dirstream);
 852         if( res < 0 ){
 853                 fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
 854                         path, strerror(e));
 855                 return 1;
 856         }
 857         return 0;
 858 }
 859
 860 static const char * const cmd_label_usage[] = {
 861         "btrfs filesystem label [<device>|<mount_point>] [<newlabel>]",
 862         "Get or change the label of a filesystem",
 863         "With one argument, get the label of filesystem on <device>.",
 864         "If <newlabel> is passed, set the filesystem label to <newlabel>.",
 865         NULL
 866 };
 867
 868 static int cmd_label(int argc, char **argv)
 869 {
 870         if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
 871                 usage(cmd_label_usage);
 872
 873         if (argc > 2)
 874                 return set_label(argv[1], argv[2]);
 875         else
 876                 return get_label(argv[1]);
 877 }
 878
 879 const struct cmd_group filesystem_cmd_group = {
 880         filesystem_cmd_group_usage, NULL, {
 881                 { "df", cmd_df, cmd_df_usage, NULL, 0 },
 882                 { "show", cmd_show, cmd_show_usage, NULL, 0 },
 883                 { "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
 884                 { "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
 885                 { "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
 886                 { "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
 887                 { "label", cmd_label, cmd_label_usage, NULL, 0 },
 888                 NULL_CMD_STRUCT
 889         }
 890 };
 891
 892 int cmd_filesystem(int argc, char **argv)
 893 {
 894         return handle_command_group(&filesystem_cmd_group, argc, argv);
 895 }