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
  36 static const char * const filesystem_cmd_group_usage[] = {
  37         "btrfs filesystem [<group>] <command> [<args>]",
  38         NULL
  39 };
  40
  41 static const char * const cmd_df_usage[] = {
  42         "btrfs filesystem df <path>",
  43         "Show space usage information for a mount point",
  44         NULL
  45 };
  46
  47 static int cmd_df(int argc, char **argv)
  48 {
  49         struct btrfs_ioctl_space_args *sargs, *sargs_orig;
  50         u64 count = 0, i;
  51         int ret;
  52         int fd;
  53         int e;
  54         char *path;
  55         DIR  *dirstream = NULL;
  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, &dirstream);
  63         if (fd < 0) {
  64                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
  65                 return 12;
  66         }
  67
  68         sargs_orig = 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                 goto out;
  81         }
  82         if (!sargs->total_spaces) {
  83                 ret = 0;
  84                 goto out;
  85         }
  86
  87         count = sargs->total_spaces;
  88
  89         sargs = realloc(sargs, sizeof(struct btrfs_ioctl_space_args) +
  90                         (count * sizeof(struct btrfs_ioctl_space_info)));
  91         if (!sargs) {
  92                 sargs = sargs_orig;
  93                 ret = -ENOMEM;
  94                 goto out;
  95         }
  96
  97         sargs->space_slots = count;
  98         sargs->total_spaces = 0;
  99
 100         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
 101         e = errno;
 102         if (ret) {
 103                 fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
 104                         path, strerror(e));
 105                 goto out;
 106         }
 107
 108         for (i = 0; i < sargs->total_spaces; i++) {
 109                 char description[80];
 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                 } else if (flags & BTRFS_BLOCK_GROUP_RAID5) {
 145                         snprintf(description+written, 9, "%s", ", RAID5");
 146                         written += 7;
 147                 } else if (flags & BTRFS_BLOCK_GROUP_RAID6) {
 148                         snprintf(description+written, 9, "%s", ", RAID6");
 149                         written += 7;
 150                 }
 151
 152                 printf("%s: total=%s, used=%s\n", description,
 153                         pretty_size(sargs->spaces[i].total_bytes),
 154                         pretty_size(sargs->spaces[i].used_bytes));
 155         }
 156 out:
 157         close_file_or_dir(fd, dirstream);
 158         free(sargs);
 159
 160         return 0;
 161 }
 162
 163 static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
 164 {
 165         char uuidbuf[37];
 166         struct list_head *cur;
 167         struct btrfs_device *device;
 168         int search_len = strlen(search);
 169
 170         search_len = min(search_len, 37);
 171         uuid_unparse(fs_devices->fsid, uuidbuf);
 172         if (!strncmp(uuidbuf, search, search_len))
 173                 return 1;
 174
 175         list_for_each(cur, &fs_devices->devices) {
 176                 device = list_entry(cur, struct btrfs_device, dev_list);
 177                 if ((device->label && strcmp(device->label, search) == 0) ||
 178                     strcmp(device->name, search) == 0)
 179                         return 1;
 180         }
 181         return 0;
 182 }
 183
 184 static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
 185 {
 186         char uuidbuf[37];
 187         struct list_head *cur;
 188         struct btrfs_device *device;
 189         u64 devs_found = 0;
 190         u64 total;
 191
 192         uuid_unparse(fs_devices->fsid, uuidbuf);
 193         device = list_entry(fs_devices->devices.next, struct btrfs_device,
 194                             dev_list);
 195         if (device->label && device->label[0])
 196                 printf("Label: '%s' ", device->label);
 197         else
 198                 printf("Label: none ");
 199
 200
 201         total = device->total_devs;
 202         printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
 203                (unsigned long long)total,
 204                pretty_size(device->super_bytes_used));
 205
 206         list_for_each(cur, &fs_devices->devices) {
 207                 device = list_entry(cur, struct btrfs_device, dev_list);
 208
 209                 printf("\tdevid %4llu size %s used %s path %s\n",
 210                        (unsigned long long)device->devid,
 211                        pretty_size(device->total_bytes),
 212                        pretty_size(device->bytes_used), device->name);
 213
 214                 devs_found++;
 215         }
 216         if (devs_found < total) {
 217                 printf("\t*** Some devices missing\n");
 218         }
 219         printf("\n");
 220 }
 221
 222 static const char * const cmd_show_usage[] = {
 223         "btrfs filesystem show [--all-devices|<uuid>]",
 224         "Show the structure of a filesystem",
 225         "If no argument is given, structure of all present filesystems is shown.",
 226         NULL
 227 };
 228
 229 static int cmd_show(int argc, char **argv)
 230 {
 231         struct list_head *all_uuids;
 232         struct btrfs_fs_devices *fs_devices;
 233         struct list_head *cur_uuid;
 234         char *search = NULL;
 235         int ret;
 236         int where = BTRFS_SCAN_PROC;
 237         int searchstart = 1;
 238
 239         if( argc > 1 && !strcmp(argv[1],"--all-devices")){
 240                 where = BTRFS_SCAN_DEV;
 241                 searchstart += 1;
 242         }
 243
 244         if (check_argc_max(argc, searchstart + 1))
 245                 usage(cmd_show_usage);
 246
 247         ret = scan_for_btrfs(where, 0);
 248
 249         if (ret){
 250                 fprintf(stderr, "ERROR: error %d while scanning\n", ret);
 251                 return 18;
 252         }
 253
 254         if(searchstart < argc)
 255                 search = argv[searchstart];
 256
 257         all_uuids = btrfs_scanned_uuids();
 258         list_for_each(cur_uuid, all_uuids) {
 259                 fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
 260                                         list);
 261                 if (search && uuid_search(fs_devices, search) == 0)
 262                         continue;
 263                 print_one_uuid(fs_devices);
 264         }
 265         printf("%s\n", BTRFS_BUILD_VERSION);
 266         return 0;
 267 }
 268
 269 static const char * const cmd_sync_usage[] = {
 270         "btrfs filesystem sync <path>",
 271         "Force a sync on a filesystem",
 272         NULL
 273 };
 274
 275 static int cmd_sync(int argc, char **argv)
 276 {
 277         int     fd, res, e;
 278         char    *path;
 279         DIR     *dirstream = NULL;
 280
 281         if (check_argc_exact(argc, 2))
 282                 usage(cmd_sync_usage);
 283
 284         path = argv[1];
 285
 286         fd = open_file_or_dir(path, &dirstream);
 287         if (fd < 0) {
 288                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 289                 return 12;
 290         }
 291
 292         printf("FSSync '%s'\n", path);
 293         res = ioctl(fd, BTRFS_IOC_SYNC);
 294         e = errno;
 295         close_file_or_dir(fd, dirstream);
 296         if( res < 0 ){
 297                 fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
 298                         path, strerror(e));
 299                 return 16;
 300         }
 301
 302         return 0;
 303 }
 304
 305 static int parse_compress_type(char *s)
 306 {
 307         if (strcmp(optarg, "zlib") == 0)
 308                 return BTRFS_COMPRESS_ZLIB;
 309         else if (strcmp(optarg, "lzo") == 0)
 310                 return BTRFS_COMPRESS_LZO;
 311         else {
 312                 fprintf(stderr, "Unknown compress type %s\n", s);
 313                 exit(1);
 314         };
 315 }
 316
 317 static const char * const cmd_defrag_usage[] = {
 318         "btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
 319         "Defragment a file or a directory",
 320         "",
 321         "-v             be verbose",
 322         "-c[zlib,lzo]   compress the file while defragmenting",
 323         "-f             flush data to disk immediately after defragmenting",
 324         "-s start       defragment only from byte onward",
 325         "-l len         defragment only up to len bytes",
 326         "-t size        minimal size of file to be considered for defragmenting",
 327         NULL
 328 };
 329
 330 static int cmd_defrag(int argc, char **argv)
 331 {
 332         int fd;
 333         int flush = 0;
 334         u64 start = 0;
 335         u64 len = (u64)-1;
 336         u32 thresh = 0;
 337         int i;
 338         int errors = 0;
 339         int ret = 0;
 340         int verbose = 0;
 341         int fancy_ioctl = 0;
 342         struct btrfs_ioctl_defrag_range_args range;
 343         int e=0;
 344         int compress_type = BTRFS_COMPRESS_NONE;
 345         DIR *dirstream = NULL;
 346
 347         optind = 1;
 348         while(1) {
 349                 int c = getopt(argc, argv, "vc::fs:l:t:");
 350                 if (c < 0)
 351                         break;
 352
 353                 switch(c) {
 354                 case 'c':
 355                         compress_type = BTRFS_COMPRESS_ZLIB;
 356                         if (optarg)
 357                                 compress_type = parse_compress_type(optarg);
 358                         fancy_ioctl = 1;
 359                         break;
 360                 case 'f':
 361                         flush = 1;
 362                         fancy_ioctl = 1;
 363                         break;
 364                 case 'v':
 365                         verbose = 1;
 366                         break;
 367                 case 's':
 368                         start = parse_size(optarg);
 369                         fancy_ioctl = 1;
 370                         break;
 371                 case 'l':
 372                         len = parse_size(optarg);
 373                         fancy_ioctl = 1;
 374                         break;
 375                 case 't':
 376                         thresh = parse_size(optarg);
 377                         fancy_ioctl = 1;
 378                         break;
 379                 default:
 380                         usage(cmd_defrag_usage);
 381                 }
 382         }
 383
 384         if (check_argc_min(argc - optind, 1))
 385                 usage(cmd_defrag_usage);
 386
 387         memset(&range, 0, sizeof(range));
 388         range.start = start;
 389         range.len = len;
 390         range.extent_thresh = thresh;
 391         if (compress_type) {
 392                 range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
 393                 range.compress_type = compress_type;
 394         }
 395         if (flush)
 396                 range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
 397
 398         for (i = optind; i < argc; i++) {
 399                 if (verbose)
 400                         printf("%s\n", argv[i]);
 401                 fd = open_file_or_dir(argv[i], &dirstream);
 402                 if (fd < 0) {
 403                         fprintf(stderr, "failed to open %s\n", argv[i]);
 404                         perror("open:");
 405                         errors++;
 406                         continue;
 407                 }
 408                 if (!fancy_ioctl) {
 409                         ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
 410                         e=errno;
 411                 } else {
 412                         ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, &range);
 413                         if (ret && errno == ENOTTY) {
 414                                 fprintf(stderr, "ERROR: defrag range ioctl not "
 415                                         "supported in this kernel, please try "
 416                                         "without any options.\n");
 417                                 errors++;
 418                                 close(fd);
 419                                 break;
 420                         }
 421                         e = errno;
 422                 }
 423                 if (ret) {
 424                         fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
 425                                 argv[i], strerror(e));
 426                         errors++;
 427                 }
 428                 close_file_or_dir(fd, dirstream);
 429         }
 430         if (verbose)
 431                 printf("%s\n", BTRFS_BUILD_VERSION);
 432         if (errors) {
 433                 fprintf(stderr, "total %d failures\n", errors);
 434                 exit(1);
 435         }
 436
 437         return errors;
 438 }
 439
 440 static const char * const cmd_resize_usage[] = {
 441         "btrfs filesystem resize [devid:][+/-]<newsize>[gkm]|[devid:]max <path>",
 442         "Resize a filesystem",
 443         "If 'max' is passed, the filesystem will occupy all available space",
 444         "on the device 'devid'.",
 445         NULL
 446 };
 447
 448 static int cmd_resize(int argc, char **argv)
 449 {
 450         struct btrfs_ioctl_vol_args     args;
 451         int     fd, res, len, e;
 452         char    *amount, *path;
 453         DIR     *dirstream = NULL;
 454
 455         if (check_argc_exact(argc, 3))
 456                 usage(cmd_resize_usage);
 457
 458         amount = argv[1];
 459         path = argv[2];
 460
 461         len = strlen(amount);
 462         if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
 463                 fprintf(stderr, "ERROR: size value too long ('%s)\n",
 464                         amount);
 465                 return 14;
 466         }
 467
 468         fd = open_file_or_dir(path, &dirstream);
 469         if (fd < 0) {
 470                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 471                 return 12;
 472         }
 473
 474         printf("Resize '%s' of '%s'\n", path, amount);
 475         strncpy_null(args.name, amount);
 476         res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
 477         e = errno;
 478         close_file_or_dir(fd, dirstream);
 479         if( res < 0 ){
 480                 fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
 481                         path, strerror(e));
 482                 return 30;
 483         }
 484         return 0;
 485 }
 486
 487 static const char * const cmd_label_usage[] = {
 488         "btrfs filesystem label [<device>|<mount_point>] [<newlabel>]",
 489         "Get or change the label of a filesystem",
 490         "With one argument, get the label of filesystem on <device>.",
 491         "If <newlabel> is passed, set the filesystem label to <newlabel>.",
 492         NULL
 493 };
 494
 495 static int cmd_label(int argc, char **argv)
 496 {
 497         if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
 498                 usage(cmd_label_usage);
 499
 500         if (argc > 2)
 501                 return set_label(argv[1], argv[2]);
 502         else
 503                 return get_label(argv[1]);
 504 }
 505
 506 const struct cmd_group filesystem_cmd_group = {
 507         filesystem_cmd_group_usage, NULL, {
 508                 { "df", cmd_df, cmd_df_usage, NULL, 0 },
 509                 { "show", cmd_show, cmd_show_usage, NULL, 0 },
 510                 { "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
 511                 { "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
 512                 { "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
 513                 { "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
 514                 { "label", cmd_label, cmd_label_usage, NULL, 0 },
 515                 NULL_CMD_STRUCT
 516         }
 517 };
 518
 519 int cmd_filesystem(int argc, char **argv)
 520 {
 521         return handle_command_group(&filesystem_cmd_group, argc, argv);
 522 }