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 #include "version.h"
  32 #include "commands.h"
  33 #include "list_sort.h"
  34
  35 static const char * const filesystem_cmd_group_usage[] = {
  36         "btrfs filesystem [<group>] <command> [<args>]",
  37         NULL
  38 };
  39
  40 static const char * const cmd_df_usage[] = {
  41         "btrfs filesystem df <path>",
  42         "Show space usage information for a mount point",
  43         NULL
  44 };
  45
  46 static int cmd_df(int argc, char **argv)
  47 {
  48         struct btrfs_ioctl_space_args *sargs, *sargs_orig;
  49         u64 count = 0, i;
  50         int ret;
  51         int fd;
  52         int e;
  53         char *path;
  54         DIR  *dirstream = NULL;
  55
  56         if (check_argc_exact(argc, 2))
  57                 usage(cmd_df_usage);
  58
  59         path = argv[1];
  60
  61         fd = open_file_or_dir(path, &dirstream);
  62         if (fd < 0) {
  63                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
  64                 return 1;
  65         }
  66
  67         sargs_orig = sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
  68         if (!sargs) {
  69                 ret = -ENOMEM;
  70                 goto out;
  71         }
  72
  73         sargs->space_slots = 0;
  74         sargs->total_spaces = 0;
  75
  76         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
  77         e = errno;
  78         if (ret) {
  79                 fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
  80                         path, strerror(e));
  81                 goto out;
  82         }
  83         if (!sargs->total_spaces) {
  84                 ret = 0;
  85                 goto out;
  86         }
  87
  88         count = sargs->total_spaces;
  89
  90         sargs = realloc(sargs, sizeof(struct btrfs_ioctl_space_args) +
  91                         (count * sizeof(struct btrfs_ioctl_space_info)));
  92         if (!sargs) {
  93                 sargs = sargs_orig;
  94                 ret = -ENOMEM;
  95                 goto out;
  96         }
  97
  98         sargs->space_slots = count;
  99         sargs->total_spaces = 0;
 100
 101         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
 102         e = errno;
 103         if (ret) {
 104                 fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
 105                         path, strerror(e));
 106                 goto out;
 107         }
 108
 109         for (i = 0; i < sargs->total_spaces; i++) {
 110                 char description[80];
 111                 int written = 0;
 112                 u64 flags = sargs->spaces[i].flags;
 113
 114                 memset(description, 0, 80);
 115
 116                 if (flags & BTRFS_BLOCK_GROUP_DATA) {
 117                         if (flags & BTRFS_BLOCK_GROUP_METADATA) {
 118                                 snprintf(description, 14, "%s",
 119                                          "Data+Metadata");
 120                                 written += 13;
 121                         } else {
 122                                 snprintf(description, 5, "%s", "Data");
 123                                 written += 4;
 124                         }
 125                 } else if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
 126                         snprintf(description, 7, "%s", "System");
 127                         written += 6;
 128                 } else if (flags & BTRFS_BLOCK_GROUP_METADATA) {
 129                         snprintf(description, 9, "%s", "Metadata");
 130                         written += 8;
 131                 }
 132
 133                 if (flags & BTRFS_BLOCK_GROUP_RAID0) {
 134                         snprintf(description+written, 8, "%s", ", RAID0");
 135                         written += 7;
 136                 } else if (flags & BTRFS_BLOCK_GROUP_RAID1) {
 137                         snprintf(description+written, 8, "%s", ", RAID1");
 138                         written += 7;
 139                 } else if (flags & BTRFS_BLOCK_GROUP_DUP) {
 140                         snprintf(description+written, 6, "%s", ", DUP");
 141                         written += 5;
 142                 } else if (flags & BTRFS_BLOCK_GROUP_RAID10) {
 143                         snprintf(description+written, 9, "%s", ", RAID10");
 144                         written += 8;
 145                 } else if (flags & BTRFS_BLOCK_GROUP_RAID5) {
 146                         snprintf(description+written, 9, "%s", ", RAID5");
 147                         written += 7;
 148                 } else if (flags & BTRFS_BLOCK_GROUP_RAID6) {
 149                         snprintf(description+written, 9, "%s", ", RAID6");
 150                         written += 7;
 151                 }
 152
 153                 printf("%s: total=%s, used=%s\n", description,
 154                         pretty_size(sargs->spaces[i].total_bytes),
 155                         pretty_size(sargs->spaces[i].used_bytes));
 156         }
 157 out:
 158         close_file_or_dir(fd, dirstream);
 159         free(sargs);
 160
 161         return !!ret;
 162 }
 163
 164 static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
 165 {
 166         char uuidbuf[37];
 167         struct list_head *cur;
 168         struct btrfs_device *device;
 169         int search_len = strlen(search);
 170
 171         search_len = min(search_len, 37);
 172         uuid_unparse(fs_devices->fsid, uuidbuf);
 173         if (!strncmp(uuidbuf, search, search_len))
 174                 return 1;
 175
 176         list_for_each(cur, &fs_devices->devices) {
 177                 device = list_entry(cur, struct btrfs_device, dev_list);
 178                 if ((device->label && strcmp(device->label, search) == 0) ||
 179                     strcmp(device->name, search) == 0)
 180                         return 1;
 181         }
 182         return 0;
 183 }
 184
 185 /*
 186  * Sort devices by devid, ascending
 187  */
 188 static int cmp_device_id(void *priv, struct list_head *a,
 189                 struct list_head *b)
 190 {
 191         const struct btrfs_device *da = list_entry(a, struct btrfs_device,
 192                         dev_list);
 193         const struct btrfs_device *db = list_entry(b, struct btrfs_device,
 194                         dev_list);
 195
 196         return da->devid < db->devid ? -1 :
 197                 da->devid > db->devid ? 1 : 0;
 198 }
 199
 200 static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
 201 {
 202         char uuidbuf[37];
 203         struct list_head *cur;
 204         struct btrfs_device *device;
 205         u64 devs_found = 0;
 206         u64 total;
 207
 208         uuid_unparse(fs_devices->fsid, uuidbuf);
 209         device = list_entry(fs_devices->devices.next, struct btrfs_device,
 210                             dev_list);
 211         if (device->label && device->label[0])
 212                 printf("Label: '%s' ", device->label);
 213         else
 214                 printf("Label: none ");
 215
 216
 217         total = device->total_devs;
 218         printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
 219                (unsigned long long)total,
 220                pretty_size(device->super_bytes_used));
 221
 222         list_sort(NULL, &fs_devices->devices, cmp_device_id);
 223         list_for_each(cur, &fs_devices->devices) {
 224                 device = list_entry(cur, struct btrfs_device, dev_list);
 225
 226                 printf("\tdevid %4llu size %s used %s path %s\n",
 227                        (unsigned long long)device->devid,
 228                        pretty_size(device->total_bytes),
 229                        pretty_size(device->bytes_used), device->name);
 230
 231                 devs_found++;
 232         }
 233         if (devs_found < total) {
 234                 printf("\t*** Some devices missing\n");
 235         }
 236         printf("\n");
 237 }
 238
 239 static const char * const cmd_show_usage[] = {
 240         "btrfs filesystem show [--all-devices|<uuid>]",
 241         "Show the structure of a filesystem",
 242         "If no argument is given, structure of all present filesystems is shown.",
 243         NULL
 244 };
 245
 246 static int cmd_show(int argc, char **argv)
 247 {
 248         struct list_head *all_uuids;
 249         struct btrfs_fs_devices *fs_devices;
 250         struct list_head *cur_uuid;
 251         char *search = NULL;
 252         int ret;
 253         int where = BTRFS_SCAN_PROC;
 254         int searchstart = 1;
 255
 256         if( argc > 1 && !strcmp(argv[1],"--all-devices")){
 257                 where = BTRFS_SCAN_DEV;
 258                 searchstart += 1;
 259         }
 260
 261         if (check_argc_max(argc, searchstart + 1))
 262                 usage(cmd_show_usage);
 263
 264         ret = scan_for_btrfs(where, 0);
 265
 266         if (ret){
 267                 fprintf(stderr, "ERROR: error %d while scanning\n", ret);
 268                 return 1;
 269         }
 270
 271         if(searchstart < argc)
 272                 search = argv[searchstart];
 273
 274         all_uuids = btrfs_scanned_uuids();
 275         list_for_each(cur_uuid, all_uuids) {
 276                 fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
 277                                         list);
 278                 if (search && uuid_search(fs_devices, search) == 0)
 279                         continue;
 280                 print_one_uuid(fs_devices);
 281         }
 282         printf("%s\n", BTRFS_BUILD_VERSION);
 283         return 0;
 284 }
 285
 286 static const char * const cmd_sync_usage[] = {
 287         "btrfs filesystem sync <path>",
 288         "Force a sync on a filesystem",
 289         NULL
 290 };
 291
 292 static int cmd_sync(int argc, char **argv)
 293 {
 294         int     fd, res, e;
 295         char    *path;
 296         DIR     *dirstream = NULL;
 297
 298         if (check_argc_exact(argc, 2))
 299                 usage(cmd_sync_usage);
 300
 301         path = argv[1];
 302
 303         fd = open_file_or_dir(path, &dirstream);
 304         if (fd < 0) {
 305                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 306                 return 1;
 307         }
 308
 309         printf("FSSync '%s'\n", path);
 310         res = ioctl(fd, BTRFS_IOC_SYNC);
 311         e = errno;
 312         close_file_or_dir(fd, dirstream);
 313         if( res < 0 ){
 314                 fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
 315                         path, strerror(e));
 316                 return 1;
 317         }
 318
 319         return 0;
 320 }
 321
 322 static int parse_compress_type(char *s)
 323 {
 324         if (strcmp(optarg, "zlib") == 0)
 325                 return BTRFS_COMPRESS_ZLIB;
 326         else if (strcmp(optarg, "lzo") == 0)
 327                 return BTRFS_COMPRESS_LZO;
 328         else {
 329                 fprintf(stderr, "Unknown compress type %s\n", s);
 330                 exit(1);
 331         };
 332 }
 333
 334 static const char * const cmd_defrag_usage[] = {
 335         "btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
 336         "Defragment a file or a directory",
 337         "",
 338         "-v             be verbose",
 339         "-c[zlib,lzo]   compress the file while defragmenting",
 340         "-f             flush data to disk immediately after defragmenting",
 341         "-s start       defragment only from byte onward",
 342         "-l len         defragment only up to len bytes",
 343         "-t size        minimal size of file to be considered for defragmenting",
 344         NULL
 345 };
 346
 347 static int cmd_defrag(int argc, char **argv)
 348 {
 349         int fd;
 350         int flush = 0;
 351         u64 start = 0;
 352         u64 len = (u64)-1;
 353         u32 thresh = 0;
 354         int i;
 355         int errors = 0;
 356         int ret = 0;
 357         int verbose = 0;
 358         int fancy_ioctl = 0;
 359         struct btrfs_ioctl_defrag_range_args range;
 360         int e=0;
 361         int compress_type = BTRFS_COMPRESS_NONE;
 362         DIR *dirstream = NULL;
 363
 364         optind = 1;
 365         while(1) {
 366                 int c = getopt(argc, argv, "vc::fs:l:t:");
 367                 if (c < 0)
 368                         break;
 369
 370                 switch(c) {
 371                 case 'c':
 372                         compress_type = BTRFS_COMPRESS_ZLIB;
 373                         if (optarg)
 374                                 compress_type = parse_compress_type(optarg);
 375                         fancy_ioctl = 1;
 376                         break;
 377                 case 'f':
 378                         flush = 1;
 379                         fancy_ioctl = 1;
 380                         break;
 381                 case 'v':
 382                         verbose = 1;
 383                         break;
 384                 case 's':
 385                         start = parse_size(optarg);
 386                         fancy_ioctl = 1;
 387                         break;
 388                 case 'l':
 389                         len = parse_size(optarg);
 390                         fancy_ioctl = 1;
 391                         break;
 392                 case 't':
 393                         thresh = parse_size(optarg);
 394                         fancy_ioctl = 1;
 395                         break;
 396                 default:
 397                         usage(cmd_defrag_usage);
 398                 }
 399         }
 400
 401         if (check_argc_min(argc - optind, 1))
 402                 usage(cmd_defrag_usage);
 403
 404         memset(&range, 0, sizeof(range));
 405         range.start = start;
 406         range.len = len;
 407         range.extent_thresh = thresh;
 408         if (compress_type) {
 409                 range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
 410                 range.compress_type = compress_type;
 411         }
 412         if (flush)
 413                 range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
 414
 415         for (i = optind; i < argc; i++) {
 416                 if (verbose)
 417                         printf("%s\n", argv[i]);
 418                 fd = open_file_or_dir(argv[i], &dirstream);
 419                 if (fd < 0) {
 420                         fprintf(stderr, "failed to open %s\n", argv[i]);
 421                         perror("open:");
 422                         errors++;
 423                         continue;
 424                 }
 425                 if (!fancy_ioctl) {
 426                         ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
 427                         e=errno;
 428                 } else {
 429                         ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, &range);
 430                         if (ret && errno == ENOTTY) {
 431                                 fprintf(stderr, "ERROR: defrag range ioctl not "
 432                                         "supported in this kernel, please try "
 433                                         "without any options.\n");
 434                                 errors++;
 435                                 close(fd);
 436                                 break;
 437                         }
 438                         e = errno;
 439                 }
 440                 if (ret) {
 441                         fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
 442                                 argv[i], strerror(e));
 443                         errors++;
 444                 }
 445                 close_file_or_dir(fd, dirstream);
 446         }
 447         if (verbose)
 448                 printf("%s\n", BTRFS_BUILD_VERSION);
 449         if (errors)
 450                 fprintf(stderr, "total %d failures\n", errors);
 451
 452         return !!errors;
 453 }
 454
 455 static const char * const cmd_resize_usage[] = {
 456         "btrfs filesystem resize [devid:][+/-]<newsize>[gkm]|[devid:]max <path>",
 457         "Resize a filesystem",
 458         "If 'max' is passed, the filesystem will occupy all available space",
 459         "on the device 'devid'.",
 460         NULL
 461 };
 462
 463 static int cmd_resize(int argc, char **argv)
 464 {
 465         struct btrfs_ioctl_vol_args     args;
 466         int     fd, res, len, e;
 467         char    *amount, *path;
 468         DIR     *dirstream = NULL;
 469
 470         if (check_argc_exact(argc, 3))
 471                 usage(cmd_resize_usage);
 472
 473         amount = argv[1];
 474         path = argv[2];
 475
 476         len = strlen(amount);
 477         if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
 478                 fprintf(stderr, "ERROR: size value too long ('%s)\n",
 479                         amount);
 480                 return 1;
 481         }
 482
 483         fd = open_file_or_dir(path, &dirstream);
 484         if (fd < 0) {
 485                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 486                 return 1;
 487         }
 488
 489         printf("Resize '%s' of '%s'\n", path, amount);
 490         strncpy_null(args.name, amount);
 491         res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
 492         e = errno;
 493         close_file_or_dir(fd, dirstream);
 494         if( res < 0 ){
 495                 fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
 496                         path, strerror(e));
 497                 return 1;
 498         }
 499         return 0;
 500 }
 501
 502 static const char * const cmd_label_usage[] = {
 503         "btrfs filesystem label [<device>|<mount_point>] [<newlabel>]",
 504         "Get or change the label of a filesystem",
 505         "With one argument, get the label of filesystem on <device>.",
 506         "If <newlabel> is passed, set the filesystem label to <newlabel>.",
 507         NULL
 508 };
 509
 510 static int cmd_label(int argc, char **argv)
 511 {
 512         if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
 513                 usage(cmd_label_usage);
 514
 515         if (argc > 2)
 516                 return set_label(argv[1], argv[2]);
 517         else
 518                 return get_label(argv[1]);
 519 }
 520
 521 const struct cmd_group filesystem_cmd_group = {
 522         filesystem_cmd_group_usage, NULL, {
 523                 { "df", cmd_df, cmd_df_usage, NULL, 0 },
 524                 { "show", cmd_show, cmd_show_usage, NULL, 0 },
 525                 { "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
 526                 { "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
 527                 { "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
 528                 { "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
 529                 { "label", cmd_label, cmd_label_usage, NULL, 0 },
 530                 NULL_CMD_STRUCT
 531         }
 532 };
 533
 534 int cmd_filesystem(int argc, char **argv)
 535 {
 536         return handle_command_group(&filesystem_cmd_group, argc, argv);
 537 }