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 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <string.h>
  20 #include <unistd.h>
  21 #include <sys/ioctl.h>
  22 #include <errno.h>
  23 #include <uuid/uuid.h>
  24 #include <ctype.h>
  25
  26 #include "kerncompat.h"
  27 #include "ctree.h"
  28 #include "ioctl.h"
  29 #include "utils.h"
  30 #include "volumes.h"
  31
  32 #include "version.h"
  33
  34 #include "commands.h"
  35 #include "btrfslabel.h"
  36
  37 static const char * const filesystem_cmd_group_usage[] = {
  38         "btrfs filesystem [<group>] <command> [<args>]",
  39         NULL
  40 };
  41
  42 static const char * const cmd_df_usage[] = {
  43         "btrfs filesystem df <path>",
  44         "Show space usage information for a mount point",
  45         NULL
  46 };
  47
  48 static int cmd_df(int argc, char **argv)
  49 {
  50         struct btrfs_ioctl_space_args *sargs;
  51         u64 count = 0, i;
  52         int ret;
  53         int fd;
  54         int e;
  55         char *path;
  56
  57         if (check_argc_exact(argc, 2))
  58                 usage(cmd_df_usage);
  59
  60         path = argv[1];
  61
  62         fd = open_file_or_dir(path);
  63         if (fd < 0) {
  64                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
  65                 return 12;
  66         }
  67
  68         sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
  69         if (!sargs)
  70                 return -ENOMEM;
  71
  72         sargs->space_slots = 0;
  73         sargs->total_spaces = 0;
  74
  75         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
  76         e = errno;
  77         if (ret) {
  78                 fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
  79                         path, strerror(e));
  80                 free(sargs);
  81                 return ret;
  82         }
  83         if (!sargs->total_spaces)
  84                 return 0;
  85
  86         count = sargs->total_spaces;
  87
  88         sargs = realloc(sargs, sizeof(struct btrfs_ioctl_space_args) +
  89                         (count * sizeof(struct btrfs_ioctl_space_info)));
  90         if (!sargs)
  91                 return -ENOMEM;
  92
  93         sargs->space_slots = count;
  94         sargs->total_spaces = 0;
  95
  96         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
  97         e = errno;
  98         if (ret) {
  99                 fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
 100                         path, strerror(e));
 101                 close(fd);
 102                 free(sargs);
 103                 return ret;
 104         }
 105
 106         for (i = 0; i < sargs->total_spaces; i++) {
 107                 char description[80];
 108                 char *total_bytes;
 109                 char *used_bytes;
 110                 int written = 0;
 111                 u64 flags = sargs->spaces[i].flags;
 112
 113                 memset(description, 0, 80);
 114
 115                 if (flags & BTRFS_BLOCK_GROUP_DATA) {
 116                         if (flags & BTRFS_BLOCK_GROUP_METADATA) {
 117                                 snprintf(description, 14, "%s",
 118                                          "Data+Metadata");
 119                                 written += 13;
 120                         } else {
 121                                 snprintf(description, 5, "%s", "Data");
 122                                 written += 4;
 123                         }
 124                 } else if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
 125                         snprintf(description, 7, "%s", "System");
 126                         written += 6;
 127                 } else if (flags & BTRFS_BLOCK_GROUP_METADATA) {
 128                         snprintf(description, 9, "%s", "Metadata");
 129                         written += 8;
 130                 }
 131
 132                 if (flags & BTRFS_BLOCK_GROUP_RAID0) {
 133                         snprintf(description+written, 8, "%s", ", RAID0");
 134                         written += 7;
 135                 } else if (flags & BTRFS_BLOCK_GROUP_RAID1) {
 136                         snprintf(description+written, 8, "%s", ", RAID1");
 137                         written += 7;
 138                 } else if (flags & BTRFS_BLOCK_GROUP_DUP) {
 139                         snprintf(description+written, 6, "%s", ", DUP");
 140                         written += 5;
 141                 } else if (flags & BTRFS_BLOCK_GROUP_RAID10) {
 142                         snprintf(description+written, 9, "%s", ", RAID10");
 143                         written += 8;
 144                 }
 145
 146                 total_bytes = pretty_sizes(sargs->spaces[i].total_bytes);
 147                 used_bytes = pretty_sizes(sargs->spaces[i].used_bytes);
 148                 printf("%s: total=%s, used=%s\n", description, total_bytes,
 149                        used_bytes);
 150         }
 151         free(sargs);
 152
 153         return 0;
 154 }
 155
 156 static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
 157 {
 158         char uuidbuf[37];
 159         struct list_head *cur;
 160         struct btrfs_device *device;
 161         int search_len = strlen(search);
 162
 163         search_len = min(search_len, 37);
 164         uuid_unparse(fs_devices->fsid, uuidbuf);
 165         if (!strncmp(uuidbuf, search, search_len))
 166                 return 1;
 167
 168         list_for_each(cur, &fs_devices->devices) {
 169                 device = list_entry(cur, struct btrfs_device, dev_list);
 170                 if ((device->label && strcmp(device->label, search) == 0) ||
 171                     strcmp(device->name, search) == 0)
 172                         return 1;
 173         }
 174         return 0;
 175 }
 176
 177 static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
 178 {
 179         char uuidbuf[37];
 180         struct list_head *cur;
 181         struct btrfs_device *device;
 182         char *super_bytes_used;
 183         u64 devs_found = 0;
 184         u64 total;
 185
 186         uuid_unparse(fs_devices->fsid, uuidbuf);
 187         device = list_entry(fs_devices->devices.next, struct btrfs_device,
 188                             dev_list);
 189         if (device->label && device->label[0])
 190                 printf("Label: '%s' ", device->label);
 191         else
 192                 printf("Label: none ");
 193
 194         super_bytes_used = pretty_sizes(device->super_bytes_used);
 195
 196         total = device->total_devs;
 197         printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
 198                (unsigned long long)total, super_bytes_used);
 199
 200         free(super_bytes_used);
 201
 202         list_for_each(cur, &fs_devices->devices) {
 203                 char *total_bytes;
 204                 char *bytes_used;
 205                 device = list_entry(cur, struct btrfs_device, dev_list);
 206                 total_bytes = pretty_sizes(device->total_bytes);
 207                 bytes_used = pretty_sizes(device->bytes_used);
 208                 printf("\tdevid %4llu size %s used %s path %s\n",
 209                        (unsigned long long)device->devid,
 210                        total_bytes, bytes_used, device->name);
 211                 free(total_bytes);
 212                 free(bytes_used);
 213                 devs_found++;
 214         }
 215         if (devs_found < total) {
 216                 printf("\t*** Some devices missing\n");
 217         }
 218         printf("\n");
 219 }
 220
 221 static const char * const cmd_show_usage[] = {
 222         "btrfs filesystem show [--all-devices] [<uuid>|<label>]",
 223         "Show the structure of a filesystem",
 224         "If no argument is given, structure of all present filesystems is shown.",
 225         NULL
 226 };
 227
 228 static int cmd_show(int argc, char **argv)
 229 {
 230         struct list_head *all_uuids;
 231         struct btrfs_fs_devices *fs_devices;
 232         struct list_head *cur_uuid;
 233         char *search = 0;
 234         int ret;
 235         int checklist = 1;
 236         int searchstart = 1;
 237
 238         if( argc > 1 && !strcmp(argv[1],"--all-devices")){
 239                 checklist = 0;
 240                 searchstart += 1;
 241         }
 242
 243         if (check_argc_max(argc, searchstart + 1))
 244                 usage(cmd_show_usage);
 245
 246         if(checklist)
 247                 ret = btrfs_scan_block_devices(0);
 248         else
 249                 ret = btrfs_scan_one_dir("/dev", 0);
 250
 251         if (ret){
 252                 fprintf(stderr, "ERROR: error %d while scanning\n", ret);
 253                 return 18;
 254         }
 255
 256         if(searchstart < argc)
 257                 search = argv[searchstart];
 258
 259         all_uuids = btrfs_scanned_uuids();
 260         list_for_each(cur_uuid, all_uuids) {
 261                 fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
 262                                         list);
 263                 if (search && uuid_search(fs_devices, search) == 0)
 264                         continue;
 265                 print_one_uuid(fs_devices);
 266         }
 267         printf("%s\n", BTRFS_BUILD_VERSION);
 268         return 0;
 269 }
 270
 271 static const char * const cmd_sync_usage[] = {
 272         "btrfs filesystem sync <path>",
 273         "Force a sync on a filesystem",
 274         NULL
 275 };
 276
 277 static int cmd_sync(int argc, char **argv)
 278 {
 279         int     fd, res, e;
 280         char    *path;
 281
 282         if (check_argc_exact(argc, 2))
 283                 usage(cmd_sync_usage);
 284
 285         path = argv[1];
 286
 287         fd = open_file_or_dir(path);
 288         if (fd < 0) {
 289                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 290                 return 12;
 291         }
 292
 293         printf("FSSync '%s'\n", path);
 294         res = ioctl(fd, BTRFS_IOC_SYNC);
 295         e = errno;
 296         close(fd);
 297         if( res < 0 ){
 298                 fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
 299                         path, strerror(e));
 300                 return 16;
 301         }
 302
 303         return 0;
 304 }
 305
 306 static u64 parse_size(char *s)
 307 {
 308         int len = strlen(s);
 309         char c;
 310         u64 mult = 1;
 311
 312         if (!isdigit(s[len - 1])) {
 313                 c = tolower(s[len - 1]);
 314                 switch (c) {
 315                 case 'g':
 316                         mult *= 1024;
 317                 case 'm':
 318                         mult *= 1024;
 319                 case 'k':
 320                         mult *= 1024;
 321                 case 'b':
 322                         break;
 323                 default:
 324                         fprintf(stderr, "Unknown size descriptor %c\n", c);
 325                         exit(1);
 326                 }
 327                 s[len - 1] = '\0';
 328         }
 329         return atoll(s) * mult;
 330 }
 331
 332 static int parse_compress_type(char *s)
 333 {
 334         if (strcmp(optarg, "zlib") == 0)
 335                 return BTRFS_COMPRESS_ZLIB;
 336         else if (strcmp(optarg, "lzo") == 0)
 337                 return BTRFS_COMPRESS_LZO;
 338         else {
 339                 fprintf(stderr, "Unknown compress type %s\n", s);
 340                 exit(1);
 341         };
 342 }
 343
 344 static const char * const cmd_defrag_usage[] = {
 345         "btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
 346         "Defragment a file or a directory",
 347         "",
 348         "-v             be verbose",
 349         "-c[zlib,lzo]   compress the file while defragmenting",
 350         "-f             flush data to disk immediately after defragmenting",
 351         "-s start       defragment only from byte onward",
 352         "-l len         defragment only up to len bytes",
 353         "-t size        minimal size of file to be considered for defragmenting",
 354         NULL
 355 };
 356
 357 static int cmd_defrag(int argc, char **argv)
 358 {
 359         int fd;
 360         int flush = 0;
 361         u64 start = 0;
 362         u64 len = (u64)-1;
 363         u32 thresh = 0;
 364         int i;
 365         int errors = 0;
 366         int ret = 0;
 367         int verbose = 0;
 368         int fancy_ioctl = 0;
 369         struct btrfs_ioctl_defrag_range_args range;
 370         int e=0;
 371         int compress_type = BTRFS_COMPRESS_NONE;
 372
 373         optind = 1;
 374         while(1) {
 375                 int c = getopt(argc, argv, "vc::fs:l:t:");
 376                 if (c < 0)
 377                         break;
 378
 379                 switch(c) {
 380                 case 'c':
 381                         compress_type = BTRFS_COMPRESS_ZLIB;
 382                         if (optarg)
 383                                 compress_type = parse_compress_type(optarg);
 384                         fancy_ioctl = 1;
 385                         break;
 386                 case 'f':
 387                         flush = 1;
 388                         fancy_ioctl = 1;
 389                         break;
 390                 case 'v':
 391                         verbose = 1;
 392                         break;
 393                 case 's':
 394                         start = parse_size(optarg);
 395                         fancy_ioctl = 1;
 396                         break;
 397                 case 'l':
 398                         len = parse_size(optarg);
 399                         fancy_ioctl = 1;
 400                         break;
 401                 case 't':
 402                         thresh = parse_size(optarg);
 403                         fancy_ioctl = 1;
 404                         break;
 405                 default:
 406                         usage(cmd_defrag_usage);
 407                 }
 408         }
 409
 410         if (check_argc_min(argc - optind, 1))
 411                 usage(cmd_defrag_usage);
 412
 413         memset(&range, 0, sizeof(range));
 414         range.start = start;
 415         range.len = len;
 416         range.extent_thresh = thresh;
 417         if (compress_type) {
 418                 range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
 419                 range.compress_type = compress_type;
 420         }
 421         if (flush)
 422                 range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
 423
 424         for (i = optind; i < argc; i++) {
 425                 if (verbose)
 426                         printf("%s\n", argv[i]);
 427                 fd = open_file_or_dir(argv[i]);
 428                 if (fd < 0) {
 429                         fprintf(stderr, "failed to open %s\n", argv[i]);
 430                         perror("open:");
 431                         errors++;
 432                         continue;
 433                 }
 434                 if (!fancy_ioctl) {
 435                         ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
 436                         e=errno;
 437                 } else {
 438                         ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, &range);
 439                         if (ret && errno == ENOTTY) {
 440                                 fprintf(stderr, "ERROR: defrag range ioctl not "
 441                                         "supported in this kernel, please try "
 442                                         "without any options.\n");
 443                                 errors++;
 444                                 close(fd);
 445                                 break;
 446                         }
 447                 }
 448                 if (ret) {
 449                         fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
 450                                 argv[i], strerror(e));
 451                         errors++;
 452                 }
 453                 close(fd);
 454         }
 455         if (verbose)
 456                 printf("%s\n", BTRFS_BUILD_VERSION);
 457         if (errors) {
 458                 fprintf(stderr, "total %d failures\n", errors);
 459                 exit(1);
 460         }
 461
 462         return errors + 20;
 463 }
 464
 465 static const char * const cmd_resize_usage[] = {
 466         "btrfs filesystem resize [devid:][+/-]<newsize>[gkm]|[devid:]max <path>",
 467         "Resize a filesystem",
 468         "If 'max' is passed, the filesystem will occupy all available space",
 469         "on the device 'devid'.",
 470         NULL
 471 };
 472
 473 static int cmd_resize(int argc, char **argv)
 474 {
 475         struct btrfs_ioctl_vol_args     args;
 476         int     fd, res, len, e;
 477         char    *amount, *path;
 478
 479         if (check_argc_exact(argc, 3))
 480                 usage(cmd_resize_usage);
 481
 482         amount = argv[1];
 483         path = argv[2];
 484
 485         fd = open_file_or_dir(path);
 486         if (fd < 0) {
 487                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 488                 return 12;
 489         }
 490         len = strlen(amount);
 491         if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
 492                 fprintf(stderr, "ERROR: size value too long ('%s)\n",
 493                         amount);
 494                 return 14;
 495         }
 496
 497         printf("Resize '%s' of '%s'\n", path, amount);
 498         strncpy(args.name, amount, BTRFS_PATH_NAME_MAX);
 499         args.name[BTRFS_PATH_NAME_MAX-1] = 0;
 500         res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
 501         e = errno;
 502         close(fd);
 503         if( res < 0 ){
 504                 fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
 505                         path, strerror(e));
 506                 return 30;
 507         }
 508         return 0;
 509 }
 510
 511 static const char * const cmd_label_usage[] = {
 512         "btrfs filesystem label <device> [<newlabel>]",
 513         "Get or change the label of an unmounted filesystem",
 514         "With one argument, get the label of filesystem on <device>.",
 515         "If <newlabel> is passed, set the filesystem label to <newlabel>.",
 516         NULL
 517 };
 518
 519 static int cmd_label(int argc, char **argv)
 520 {
 521         if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
 522                 usage(cmd_label_usage);
 523
 524         if (argc > 2)
 525                 return set_label(argv[1], argv[2]);
 526         else
 527                 return get_label(argv[1]);
 528 }
 529
 530 const struct cmd_group filesystem_cmd_group = {
 531         filesystem_cmd_group_usage, NULL, {
 532                 { "df", cmd_df, cmd_df_usage, NULL, 0 },
 533                 { "show", cmd_show, cmd_show_usage, NULL, 0 },
 534                 { "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
 535                 { "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
 536                 { "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
 537                 { "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
 538                 { "label", cmd_label, cmd_label_usage, NULL, 0 },
 539                 { 0, 0, 0, 0, 0 },
 540         }
 541 };
 542
 543 int cmd_filesystem(int argc, char **argv)
 544 {
 545         return handle_command_group(&filesystem_cmd_group, argc, argv);
 546 }