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 1;
  66         }
  67
  68         sargs_orig = sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
  69         if (!sargs) {
  70                 ret = -ENOMEM;
  71                 goto out;
  72         }
  73
  74         sargs->space_slots = 0;
  75         sargs->total_spaces = 0;
  76
  77         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
  78         e = errno;
  79         if (ret) {
  80                 fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
  81                         path, strerror(e));
  82                 goto out;
  83         }
  84         if (!sargs->total_spaces) {
  85                 ret = 0;
  86                 goto out;
  87         }
  88
  89         count = sargs->total_spaces;
  90
  91         sargs = realloc(sargs, sizeof(struct btrfs_ioctl_space_args) +
  92                         (count * sizeof(struct btrfs_ioctl_space_info)));
  93         if (!sargs) {
  94                 sargs = sargs_orig;
  95                 ret = -ENOMEM;
  96                 goto out;
  97         }
  98
  99         sargs->space_slots = count;
 100         sargs->total_spaces = 0;
 101
 102         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
 103         e = errno;
 104         if (ret) {
 105                 fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
 106                         path, strerror(e));
 107                 goto out;
 108         }
 109
 110         for (i = 0; i < sargs->total_spaces; i++) {
 111                 char description[80];
 112                 int written = 0;
 113                 u64 flags = sargs->spaces[i].flags;
 114
 115                 memset(description, 0, 80);
 116
 117                 if (flags & BTRFS_BLOCK_GROUP_DATA) {
 118                         if (flags & BTRFS_BLOCK_GROUP_METADATA) {
 119                                 snprintf(description, 14, "%s",
 120                                          "Data+Metadata");
 121                                 written += 13;
 122                         } else {
 123                                 snprintf(description, 5, "%s", "Data");
 124                                 written += 4;
 125                         }
 126                 } else if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
 127                         snprintf(description, 7, "%s", "System");
 128                         written += 6;
 129                 } else if (flags & BTRFS_BLOCK_GROUP_METADATA) {
 130                         snprintf(description, 9, "%s", "Metadata");
 131                         written += 8;
 132                 }
 133
 134                 if (flags & BTRFS_BLOCK_GROUP_RAID0) {
 135                         snprintf(description+written, 8, "%s", ", RAID0");
 136                         written += 7;
 137                 } else if (flags & BTRFS_BLOCK_GROUP_RAID1) {
 138                         snprintf(description+written, 8, "%s", ", RAID1");
 139                         written += 7;
 140                 } else if (flags & BTRFS_BLOCK_GROUP_DUP) {
 141                         snprintf(description+written, 6, "%s", ", DUP");
 142                         written += 5;
 143                 } else if (flags & BTRFS_BLOCK_GROUP_RAID10) {
 144                         snprintf(description+written, 9, "%s", ", RAID10");
 145                         written += 8;
 146                 } else if (flags & BTRFS_BLOCK_GROUP_RAID5) {
 147                         snprintf(description+written, 9, "%s", ", RAID5");
 148                         written += 7;
 149                 } else if (flags & BTRFS_BLOCK_GROUP_RAID6) {
 150                         snprintf(description+written, 9, "%s", ", RAID6");
 151                         written += 7;
 152                 }
 153
 154                 printf("%s: total=%s, used=%s\n", description,
 155                         pretty_size(sargs->spaces[i].total_bytes),
 156                         pretty_size(sargs->spaces[i].used_bytes));
 157         }
 158 out:
 159         close_file_or_dir(fd, dirstream);
 160         free(sargs);
 161
 162         return !!ret;
 163 }
 164
 165 static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
 166 {
 167         char uuidbuf[37];
 168         struct list_head *cur;
 169         struct btrfs_device *device;
 170         int search_len = strlen(search);
 171
 172         search_len = min(search_len, 37);
 173         uuid_unparse(fs_devices->fsid, uuidbuf);
 174         if (!strncmp(uuidbuf, search, search_len))
 175                 return 1;
 176
 177         list_for_each(cur, &fs_devices->devices) {
 178                 device = list_entry(cur, struct btrfs_device, dev_list);
 179                 if ((device->label && strcmp(device->label, search) == 0) ||
 180                     strcmp(device->name, search) == 0)
 181                         return 1;
 182         }
 183         return 0;
 184 }
 185
 186 static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
 187 {
 188         char uuidbuf[37];
 189         struct list_head *cur;
 190         struct btrfs_device *device;
 191         u64 devs_found = 0;
 192         u64 total;
 193
 194         uuid_unparse(fs_devices->fsid, uuidbuf);
 195         device = list_entry(fs_devices->devices.next, struct btrfs_device,
 196                             dev_list);
 197         if (device->label && device->label[0])
 198                 printf("Label: '%s' ", device->label);
 199         else
 200                 printf("Label: none ");
 201
 202
 203         total = device->total_devs;
 204         printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
 205                (unsigned long long)total,
 206                pretty_size(device->super_bytes_used));
 207
 208         list_for_each(cur, &fs_devices->devices) {
 209                 device = list_entry(cur, struct btrfs_device, dev_list);
 210
 211                 printf("\tdevid %4llu size %s used %s path %s\n",
 212                        (unsigned long long)device->devid,
 213                        pretty_size(device->total_bytes),
 214                        pretty_size(device->bytes_used), device->name);
 215
 216                 devs_found++;
 217         }
 218         if (devs_found < total) {
 219                 printf("\t*** Some devices missing\n");
 220         }
 221         printf("\n");
 222 }
 223
 224 static const char * const cmd_show_usage[] = {
 225         "btrfs filesystem show [--all-devices|<uuid>]",
 226         "Show the structure of a filesystem",
 227         "If no argument is given, structure of all present filesystems is shown.",
 228         NULL
 229 };
 230
 231 static int cmd_show(int argc, char **argv)
 232 {
 233         struct list_head *all_uuids;
 234         struct btrfs_fs_devices *fs_devices;
 235         struct list_head *cur_uuid;
 236         char *search = NULL;
 237         int ret;
 238         int where = BTRFS_SCAN_PROC;
 239         int searchstart = 1;
 240
 241         if( argc > 1 && !strcmp(argv[1],"--all-devices")){
 242                 where = BTRFS_SCAN_DEV;
 243                 searchstart += 1;
 244         }
 245
 246         if (check_argc_max(argc, searchstart + 1))
 247                 usage(cmd_show_usage);
 248
 249         ret = scan_for_btrfs(where, 0);
 250
 251         if (ret){
 252                 fprintf(stderr, "ERROR: error %d while scanning\n", ret);
 253                 return 1;
 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         DIR     *dirstream = NULL;
 282
 283         if (check_argc_exact(argc, 2))
 284                 usage(cmd_sync_usage);
 285
 286         path = argv[1];
 287
 288         fd = open_file_or_dir(path, &dirstream);
 289         if (fd < 0) {
 290                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 291                 return 1;
 292         }
 293
 294         printf("FSSync '%s'\n", path);
 295         res = ioctl(fd, BTRFS_IOC_SYNC);
 296         e = errno;
 297         close_file_or_dir(fd, dirstream);
 298         if( res < 0 ){
 299                 fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
 300                         path, strerror(e));
 301                 return 1;
 302         }
 303
 304         return 0;
 305 }
 306
 307 static int parse_compress_type(char *s)
 308 {
 309         if (strcmp(optarg, "zlib") == 0)
 310                 return BTRFS_COMPRESS_ZLIB;
 311         else if (strcmp(optarg, "lzo") == 0)
 312                 return BTRFS_COMPRESS_LZO;
 313         else {
 314                 fprintf(stderr, "Unknown compress type %s\n", s);
 315                 exit(1);
 316         };
 317 }
 318
 319 static const char * const cmd_defrag_usage[] = {
 320         "btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
 321         "Defragment a file or a directory",
 322         "",
 323         "-v             be verbose",
 324         "-c[zlib,lzo]   compress the file while defragmenting",
 325         "-f             flush data to disk immediately after defragmenting",
 326         "-s start       defragment only from byte onward",
 327         "-l len         defragment only up to len bytes",
 328         "-t size        minimal size of file to be considered for defragmenting",
 329         NULL
 330 };
 331
 332 static int cmd_defrag(int argc, char **argv)
 333 {
 334         int fd;
 335         int flush = 0;
 336         u64 start = 0;
 337         u64 len = (u64)-1;
 338         u32 thresh = 0;
 339         int i;
 340         int errors = 0;
 341         int ret = 0;
 342         int verbose = 0;
 343         int fancy_ioctl = 0;
 344         struct btrfs_ioctl_defrag_range_args range;
 345         int e=0;
 346         int compress_type = BTRFS_COMPRESS_NONE;
 347         DIR *dirstream = NULL;
 348
 349         optind = 1;
 350         while(1) {
 351                 int c = getopt(argc, argv, "vc::fs:l:t:");
 352                 if (c < 0)
 353                         break;
 354
 355                 switch(c) {
 356                 case 'c':
 357                         compress_type = BTRFS_COMPRESS_ZLIB;
 358                         if (optarg)
 359                                 compress_type = parse_compress_type(optarg);
 360                         fancy_ioctl = 1;
 361                         break;
 362                 case 'f':
 363                         flush = 1;
 364                         fancy_ioctl = 1;
 365                         break;
 366                 case 'v':
 367                         verbose = 1;
 368                         break;
 369                 case 's':
 370                         start = parse_size(optarg);
 371                         fancy_ioctl = 1;
 372                         break;
 373                 case 'l':
 374                         len = parse_size(optarg);
 375                         fancy_ioctl = 1;
 376                         break;
 377                 case 't':
 378                         thresh = parse_size(optarg);
 379                         fancy_ioctl = 1;
 380                         break;
 381                 default:
 382                         usage(cmd_defrag_usage);
 383                 }
 384         }
 385
 386         if (check_argc_min(argc - optind, 1))
 387                 usage(cmd_defrag_usage);
 388
 389         memset(&range, 0, sizeof(range));
 390         range.start = start;
 391         range.len = len;
 392         range.extent_thresh = thresh;
 393         if (compress_type) {
 394                 range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
 395                 range.compress_type = compress_type;
 396         }
 397         if (flush)
 398                 range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
 399
 400         for (i = optind; i < argc; i++) {
 401                 if (verbose)
 402                         printf("%s\n", argv[i]);
 403                 fd = open_file_or_dir(argv[i], &dirstream);
 404                 if (fd < 0) {
 405                         fprintf(stderr, "failed to open %s\n", argv[i]);
 406                         perror("open:");
 407                         errors++;
 408                         continue;
 409                 }
 410                 if (!fancy_ioctl) {
 411                         ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
 412                         e=errno;
 413                 } else {
 414                         ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, &range);
 415                         if (ret && errno == ENOTTY) {
 416                                 fprintf(stderr, "ERROR: defrag range ioctl not "
 417                                         "supported in this kernel, please try "
 418                                         "without any options.\n");
 419                                 errors++;
 420                                 close(fd);
 421                                 break;
 422                         }
 423                         e = errno;
 424                 }
 425                 if (ret) {
 426                         fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
 427                                 argv[i], strerror(e));
 428                         errors++;
 429                 }
 430                 close_file_or_dir(fd, dirstream);
 431         }
 432         if (verbose)
 433                 printf("%s\n", BTRFS_BUILD_VERSION);
 434         if (errors)
 435                 fprintf(stderr, "total %d failures\n", errors);
 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 1;
 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 1;
 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 1;
 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 }