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