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
  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);
  62         if (fd < 0) {
  63                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
  64                 return 12;
  65         }
  66
  67         sargs_orig = sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
  68         if (!sargs)
  69                 return -ENOMEM;
  70
  71         sargs->space_slots = 0;
  72         sargs->total_spaces = 0;
  73
  74         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
  75         e = errno;
  76         if (ret) {
  77                 fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
  78                         path, strerror(e));
  79                 close(fd);
  80                 free(sargs);
  81                 return ret;
  82         }
  83         if (!sargs->total_spaces) {
  84                 close(fd);
  85                 free(sargs);
  86                 return 0;
  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                 close(fd);
  95                 free(sargs_orig);
  96                 return -ENOMEM;
  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                 close(fd);
 108                 free(sargs);
 109                 return ret;
 110         }
 111
 112         for (i = 0; i < sargs->total_spaces; i++) {
 113                 char description[80];
 114                 char *total_bytes;
 115                 char *used_bytes;
 116                 int written = 0;
 117                 u64 flags = sargs->spaces[i].flags;
 118
 119                 memset(description, 0, 80);
 120
 121                 if (flags & BTRFS_BLOCK_GROUP_DATA) {
 122                         if (flags & BTRFS_BLOCK_GROUP_METADATA) {
 123                                 snprintf(description, 14, "%s",
 124                                          "Data+Metadata");
 125                                 written += 13;
 126                         } else {
 127                                 snprintf(description, 5, "%s", "Data");
 128                                 written += 4;
 129                         }
 130                 } else if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
 131                         snprintf(description, 7, "%s", "System");
 132                         written += 6;
 133                 } else if (flags & BTRFS_BLOCK_GROUP_METADATA) {
 134                         snprintf(description, 9, "%s", "Metadata");
 135                         written += 8;
 136                 }
 137
 138                 if (flags & BTRFS_BLOCK_GROUP_RAID0) {
 139                         snprintf(description+written, 8, "%s", ", RAID0");
 140                         written += 7;
 141                 } else if (flags & BTRFS_BLOCK_GROUP_RAID1) {
 142                         snprintf(description+written, 8, "%s", ", RAID1");
 143                         written += 7;
 144                 } else if (flags & BTRFS_BLOCK_GROUP_DUP) {
 145                         snprintf(description+written, 6, "%s", ", DUP");
 146                         written += 5;
 147                 } else if (flags & BTRFS_BLOCK_GROUP_RAID10) {
 148                         snprintf(description+written, 9, "%s", ", RAID10");
 149                         written += 8;
 150                 } else if (flags & BTRFS_BLOCK_GROUP_RAID5) {
 151                         snprintf(description+written, 9, "%s", ", RAID5");
 152                         written += 7;
 153                 } else if (flags & BTRFS_BLOCK_GROUP_RAID6) {
 154                         snprintf(description+written, 9, "%s", ", RAID6");
 155                         written += 7;
 156                 }
 157
 158                 total_bytes = pretty_sizes(sargs->spaces[i].total_bytes);
 159                 used_bytes = pretty_sizes(sargs->spaces[i].used_bytes);
 160                 printf("%s: total=%s, used=%s\n", description, total_bytes,
 161                        used_bytes);
 162         }
 163         close(fd);
 164         free(sargs);
 165
 166         return 0;
 167 }
 168
 169 static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
 170 {
 171         char uuidbuf[37];
 172         struct list_head *cur;
 173         struct btrfs_device *device;
 174         int search_len = strlen(search);
 175
 176         search_len = min(search_len, 37);
 177         uuid_unparse(fs_devices->fsid, uuidbuf);
 178         if (!strncmp(uuidbuf, search, search_len))
 179                 return 1;
 180
 181         list_for_each(cur, &fs_devices->devices) {
 182                 device = list_entry(cur, struct btrfs_device, dev_list);
 183                 if ((device->label && strcmp(device->label, search) == 0) ||
 184                     strcmp(device->name, search) == 0)
 185                         return 1;
 186         }
 187         return 0;
 188 }
 189
 190 static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
 191 {
 192         char uuidbuf[37];
 193         struct list_head *cur;
 194         struct btrfs_device *device;
 195         char *super_bytes_used;
 196         u64 devs_found = 0;
 197         u64 total;
 198
 199         uuid_unparse(fs_devices->fsid, uuidbuf);
 200         device = list_entry(fs_devices->devices.next, struct btrfs_device,
 201                             dev_list);
 202         if (device->label && device->label[0])
 203                 printf("Label: '%s' ", device->label);
 204         else
 205                 printf("Label: none ");
 206
 207         super_bytes_used = pretty_sizes(device->super_bytes_used);
 208
 209         total = device->total_devs;
 210         printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
 211                (unsigned long long)total, super_bytes_used);
 212
 213         free(super_bytes_used);
 214
 215         list_for_each(cur, &fs_devices->devices) {
 216                 char *total_bytes;
 217                 char *bytes_used;
 218                 device = list_entry(cur, struct btrfs_device, dev_list);
 219                 total_bytes = pretty_sizes(device->total_bytes);
 220                 bytes_used = pretty_sizes(device->bytes_used);
 221                 printf("\tdevid %4llu size %s used %s path %s\n",
 222                        (unsigned long long)device->devid,
 223                        total_bytes, bytes_used, device->name);
 224                 free(total_bytes);
 225                 free(bytes_used);
 226                 devs_found++;
 227         }
 228         if (devs_found < total) {
 229                 printf("\t*** Some devices missing\n");
 230         }
 231         printf("\n");
 232 }
 233
 234 static const char * const cmd_show_usage[] = {
 235         "btrfs filesystem show [--all-devices] [<uuid>|<label>]",
 236         "Show the structure of a filesystem",
 237         "If no argument is given, structure of all present filesystems is shown.",
 238         NULL
 239 };
 240
 241 static int cmd_show(int argc, char **argv)
 242 {
 243         struct list_head *all_uuids;
 244         struct btrfs_fs_devices *fs_devices;
 245         struct list_head *cur_uuid;
 246         char *search = 0;
 247         int ret;
 248         int checklist = 1;
 249         int searchstart = 1;
 250
 251         if( argc > 1 && !strcmp(argv[1],"--all-devices")){
 252                 checklist = 0;
 253                 searchstart += 1;
 254         }
 255
 256         if (check_argc_max(argc, searchstart + 1))
 257                 usage(cmd_show_usage);
 258
 259         if(checklist)
 260                 ret = btrfs_scan_block_devices(0);
 261         else
 262                 ret = btrfs_scan_one_dir("/dev", 0);
 263
 264         if (ret){
 265                 fprintf(stderr, "ERROR: error %d while scanning\n", ret);
 266                 return 18;
 267         }
 268
 269         if(searchstart < argc)
 270                 search = argv[searchstart];
 271
 272         all_uuids = btrfs_scanned_uuids();
 273         list_for_each(cur_uuid, all_uuids) {
 274                 fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
 275                                         list);
 276                 if (search && uuid_search(fs_devices, search) == 0)
 277                         continue;
 278                 print_one_uuid(fs_devices);
 279         }
 280         printf("%s\n", BTRFS_BUILD_VERSION);
 281         return 0;
 282 }
 283
 284 static const char * const cmd_sync_usage[] = {
 285         "btrfs filesystem sync <path>",
 286         "Force a sync on a filesystem",
 287         NULL
 288 };
 289
 290 static int cmd_sync(int argc, char **argv)
 291 {
 292         int     fd, res, e;
 293         char    *path;
 294
 295         if (check_argc_exact(argc, 2))
 296                 usage(cmd_sync_usage);
 297
 298         path = argv[1];
 299
 300         fd = open_file_or_dir(path);
 301         if (fd < 0) {
 302                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 303                 return 12;
 304         }
 305
 306         printf("FSSync '%s'\n", path);
 307         res = ioctl(fd, BTRFS_IOC_SYNC);
 308         e = errno;
 309         close(fd);
 310         if( res < 0 ){
 311                 fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
 312                         path, strerror(e));
 313                 return 16;
 314         }
 315
 316         return 0;
 317 }
 318
 319 static int parse_compress_type(char *s)
 320 {
 321         if (strcmp(optarg, "zlib") == 0)
 322                 return BTRFS_COMPRESS_ZLIB;
 323         else if (strcmp(optarg, "lzo") == 0)
 324                 return BTRFS_COMPRESS_LZO;
 325         else {
 326                 fprintf(stderr, "Unknown compress type %s\n", s);
 327                 exit(1);
 328         };
 329 }
 330
 331 static const char * const cmd_defrag_usage[] = {
 332         "btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
 333         "Defragment a file or a directory",
 334         "",
 335         "-v             be verbose",
 336         "-c[zlib,lzo]   compress the file while defragmenting",
 337         "-f             flush data to disk immediately after defragmenting",
 338         "-s start       defragment only from byte onward",
 339         "-l len         defragment only up to len bytes",
 340         "-t size        minimal size of file to be considered for defragmenting",
 341         NULL
 342 };
 343
 344 static int cmd_defrag(int argc, char **argv)
 345 {
 346         int fd;
 347         int flush = 0;
 348         u64 start = 0;
 349         u64 len = (u64)-1;
 350         u32 thresh = 0;
 351         int i;
 352         int errors = 0;
 353         int ret = 0;
 354         int verbose = 0;
 355         int fancy_ioctl = 0;
 356         struct btrfs_ioctl_defrag_range_args range;
 357         int e=0;
 358         int compress_type = BTRFS_COMPRESS_NONE;
 359
 360         optind = 1;
 361         while(1) {
 362                 int c = getopt(argc, argv, "vc::fs:l:t:");
 363                 if (c < 0)
 364                         break;
 365
 366                 switch(c) {
 367                 case 'c':
 368                         compress_type = BTRFS_COMPRESS_ZLIB;
 369                         if (optarg)
 370                                 compress_type = parse_compress_type(optarg);
 371                         fancy_ioctl = 1;
 372                         break;
 373                 case 'f':
 374                         flush = 1;
 375                         fancy_ioctl = 1;
 376                         break;
 377                 case 'v':
 378                         verbose = 1;
 379                         break;
 380                 case 's':
 381                         start = parse_size(optarg);
 382                         fancy_ioctl = 1;
 383                         break;
 384                 case 'l':
 385                         len = parse_size(optarg);
 386                         fancy_ioctl = 1;
 387                         break;
 388                 case 't':
 389                         thresh = parse_size(optarg);
 390                         fancy_ioctl = 1;
 391                         break;
 392                 default:
 393                         usage(cmd_defrag_usage);
 394                 }
 395         }
 396
 397         if (check_argc_min(argc - optind, 1))
 398                 usage(cmd_defrag_usage);
 399
 400         memset(&range, 0, sizeof(range));
 401         range.start = start;
 402         range.len = len;
 403         range.extent_thresh = thresh;
 404         if (compress_type) {
 405                 range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
 406                 range.compress_type = compress_type;
 407         }
 408         if (flush)
 409                 range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
 410
 411         for (i = optind; i < argc; i++) {
 412                 if (verbose)
 413                         printf("%s\n", argv[i]);
 414                 fd = open_file_or_dir(argv[i]);
 415                 if (fd < 0) {
 416                         fprintf(stderr, "failed to open %s\n", argv[i]);
 417                         perror("open:");
 418                         errors++;
 419                         continue;
 420                 }
 421                 if (!fancy_ioctl) {
 422                         ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
 423                         e=errno;
 424                 } else {
 425                         ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, &range);
 426                         if (ret && errno == ENOTTY) {
 427                                 fprintf(stderr, "ERROR: defrag range ioctl not "
 428                                         "supported in this kernel, please try "
 429                                         "without any options.\n");
 430                                 errors++;
 431                                 close(fd);
 432                                 break;
 433                         }
 434                         e = errno;
 435                 }
 436                 if (ret) {
 437                         fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
 438                                 argv[i], strerror(e));
 439                         errors++;
 440                 }
 441                 close(fd);
 442         }
 443         if (verbose)
 444                 printf("%s\n", BTRFS_BUILD_VERSION);
 445         if (errors) {
 446                 fprintf(stderr, "total %d failures\n", errors);
 447                 exit(1);
 448         }
 449
 450         return errors;
 451 }
 452
 453 static const char * const cmd_resize_usage[] = {
 454         "btrfs filesystem resize [devid:][+/-]<newsize>[gkm]|[devid:]max <path>",
 455         "Resize a filesystem",
 456         "If 'max' is passed, the filesystem will occupy all available space",
 457         "on the device 'devid'.",
 458         NULL
 459 };
 460
 461 static int cmd_resize(int argc, char **argv)
 462 {
 463         struct btrfs_ioctl_vol_args     args;
 464         int     fd, res, len, e;
 465         char    *amount, *path;
 466
 467         if (check_argc_exact(argc, 3))
 468                 usage(cmd_resize_usage);
 469
 470         amount = argv[1];
 471         path = argv[2];
 472
 473         len = strlen(amount);
 474         if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
 475                 fprintf(stderr, "ERROR: size value too long ('%s)\n",
 476                         amount);
 477                 return 14;
 478         }
 479
 480         fd = open_file_or_dir(path);
 481         if (fd < 0) {
 482                 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
 483                 return 12;
 484         }
 485
 486         printf("Resize '%s' of '%s'\n", path, amount);
 487         strncpy_null(args.name, amount);
 488         res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
 489         e = errno;
 490         close(fd);
 491         if( res < 0 ){
 492                 fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
 493                         path, strerror(e));
 494                 return 30;
 495         }
 496         return 0;
 497 }
 498
 499 static const char * const cmd_label_usage[] = {
 500         "btrfs filesystem label [<device>|<mountpoint>] [<newlabel>]",
 501         "Get or change the label of a filesystem",
 502         "With one argument, get the label of filesystem on <device>.",
 503         "If <newlabel> is passed, set the filesystem label to <newlabel>.",
 504         NULL
 505 };
 506
 507 static int cmd_label(int argc, char **argv)
 508 {
 509         if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
 510                 usage(cmd_label_usage);
 511
 512         if (argc > 2)
 513                 return set_label(argv[1], argv[2]);
 514         else
 515                 return get_label(argv[1]);
 516 }
 517
 518 const struct cmd_group filesystem_cmd_group = {
 519         filesystem_cmd_group_usage, NULL, {
 520                 { "df", cmd_df, cmd_df_usage, NULL, 0 },
 521                 { "show", cmd_show, cmd_show_usage, NULL, 0 },
 522                 { "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
 523                 { "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
 524                 { "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
 525                 { "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
 526                 { "label", cmd_label, cmd_label_usage, NULL, 0 },
 527                 { 0, 0, 0, 0, 0 },
 528         }
 529 };
 530
 531 int cmd_filesystem(int argc, char **argv)
 532 {
 533         return handle_command_group(&filesystem_cmd_group, argc, argv);
 534 }