cmds-fi-disk_usage.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 <stdarg.h>
  24
  25 #include "utils.h"
  26 #include "kerncompat.h"
  27 #include "ctree.h"
  28 #include "string-table.h"
  29 #include "cmds-fi-disk_usage.h"
  30 #include "commands.h"
  31
  32 #include "version.h"
  33
  34 /*
  35  * Add the chunk info to the chunk_info list
  36  */
  37 static int add_info_to_list(struct chunk_info **info_ptr,
  38                         int *info_count,
  39                         struct btrfs_chunk *chunk)
  40 {
  41
  42         u64 type = btrfs_stack_chunk_type(chunk);
  43         u64 size = btrfs_stack_chunk_length(chunk);
  44         int num_stripes = btrfs_stack_chunk_num_stripes(chunk);
  45         int j;
  46
  47         for (j = 0 ; j < num_stripes ; j++) {
  48                 int i;
  49                 struct chunk_info *p = 0;
  50                 struct btrfs_stripe *stripe;
  51                 u64    devid;
  52
  53                 stripe = btrfs_stripe_nr(chunk, j);
  54                 devid = btrfs_stack_stripe_devid(stripe);
  55
  56                 for (i = 0 ; i < *info_count ; i++)
  57                         if ((*info_ptr)[i].type == type &&
  58                             (*info_ptr)[i].devid == devid &&
  59                             (*info_ptr)[i].num_stripes == num_stripes ) {
  60                                 p = (*info_ptr) + i;
  61                                 break;
  62                         }
  63
  64                 if (!p) {
  65                         int size = sizeof(struct btrfs_chunk) * (*info_count+1);
  66                         struct chunk_info *res = realloc(*info_ptr, size);
  67
  68                         if (!res) {
  69                                 free(*info_ptr);
  70                                 fprintf(stderr, "ERROR: not enough memory\n");
  71                                 return -ENOMEM;
  72                         }
  73
  74                         *info_ptr = res;
  75                         p = res + *info_count;
  76                         (*info_count)++;
  77
  78                         p->devid = devid;
  79                         p->type = type;
  80                         p->size = 0;
  81                         p->num_stripes = num_stripes;
  82                 }
  83
  84                 p->size += size;
  85
  86         }
  87
  88         return 0;
  89
  90 }
  91
  92 /*
  93  *  Helper to sort the chunk type
  94  */
  95 static int cmp_chunk_block_group(u64 f1, u64 f2)
  96 {
  97
  98         u64 mask;
  99
 100         if ((f1 & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
 101                 (f2 & BTRFS_BLOCK_GROUP_TYPE_MASK))
 102                         mask = BTRFS_BLOCK_GROUP_PROFILE_MASK;
 103         else if (f2 & BTRFS_BLOCK_GROUP_SYSTEM)
 104                         return -1;
 105         else if (f1 & BTRFS_BLOCK_GROUP_SYSTEM)
 106                         return +1;
 107         else
 108                         mask = BTRFS_BLOCK_GROUP_TYPE_MASK;
 109
 110         if ((f1 & mask) > (f2 & mask))
 111                 return +1;
 112         else if ((f1 & mask) < (f2 & mask))
 113                 return -1;
 114         else
 115                 return 0;
 116 }
 117
 118 /*
 119  * Helper to sort the chunk
 120  */
 121 static int cmp_chunk_info(const void *a, const void *b)
 122 {
 123         return cmp_chunk_block_group(
 124                 ((struct chunk_info *)a)->type,
 125                 ((struct chunk_info *)b)->type);
 126 }
 127
 128 static int load_chunk_info(int fd, struct chunk_info **info_ptr, int *info_count)
 129 {
 130         int ret;
 131         struct btrfs_ioctl_search_args args;
 132         struct btrfs_ioctl_search_key *sk = &args.key;
 133         struct btrfs_ioctl_search_header *sh;
 134         unsigned long off = 0;
 135         int i, e;
 136
 137         memset(&args, 0, sizeof(args));
 138
 139         /*
 140          * there may be more than one ROOT_ITEM key if there are
 141          * snapshots pending deletion, we have to loop through
 142          * them.
 143          */
 144         sk->tree_id = BTRFS_CHUNK_TREE_OBJECTID;
 145
 146         sk->min_objectid = 0;
 147         sk->max_objectid = (u64)-1;
 148         sk->max_type = 0;
 149         sk->min_type = (u8)-1;
 150         sk->min_offset = 0;
 151         sk->max_offset = (u64)-1;
 152         sk->min_transid = 0;
 153         sk->max_transid = (u64)-1;
 154         sk->nr_items = 4096;
 155
 156         while (1) {
 157                 ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
 158                 e = errno;
 159                 if (ret == -EPERM)
 160                         return ret;
 161
 162                 if (ret < 0) {
 163                         fprintf(stderr,
 164                                 "ERROR: can't perform the search - %s\n",
 165                                 strerror(e));
 166                         return ret;
 167                 }
 168                 /* the ioctl returns the number of item it found in nr_items */
 169
 170                 if (sk->nr_items == 0)
 171                         break;
 172
 173                 off = 0;
 174                 for (i = 0; i < sk->nr_items; i++) {
 175                         struct btrfs_chunk *item;
 176                         sh = (struct btrfs_ioctl_search_header *)(args.buf +
 177                                                                   off);
 178
 179                         off += sizeof(*sh);
 180                         item = (struct btrfs_chunk *)(args.buf + off);
 181
 182                         ret = add_info_to_list(info_ptr, info_count, item);
 183                         if (ret) {
 184                                 *info_ptr = 0;
 185                                 return ret;
 186                         }
 187
 188                         off += sh->len;
 189
 190                         sk->min_objectid = sh->objectid;
 191                         sk->min_type = sh->type;
 192                         sk->min_offset = sh->offset+1;
 193
 194                 }
 195                 if (!sk->min_offset)    /* overflow */
 196                         sk->min_type++;
 197                 else
 198                         continue;
 199
 200                 if (!sk->min_type)
 201                         sk->min_objectid++;
 202                  else
 203                         continue;
 204
 205                 if (!sk->min_objectid)
 206                         break;
 207         }
 208
 209         qsort(*info_ptr, *info_count, sizeof(struct chunk_info),
 210                 cmp_chunk_info);
 211
 212         return 0;
 213 }
 214
 215 /*
 216  * Helper to sort the struct btrfs_ioctl_space_info
 217  */
 218 static int cmp_btrfs_ioctl_space_info(const void *a, const void *b)
 219 {
 220         return cmp_chunk_block_group(
 221                 ((struct btrfs_ioctl_space_info *)a)->flags,
 222                 ((struct btrfs_ioctl_space_info *)b)->flags);
 223 }
 224
 225 /*
 226  * This function load all the information about the space usage
 227  */
 228 static struct btrfs_ioctl_space_args *load_space_info(int fd, char *path)
 229 {
 230         struct btrfs_ioctl_space_args *sargs = 0, *sargs_orig = 0;
 231         int e, ret, count;
 232
 233         sargs_orig = sargs = calloc(1, sizeof(struct btrfs_ioctl_space_args));
 234         if (!sargs) {
 235                 fprintf(stderr, "ERROR: not enough memory\n");
 236                 return NULL;
 237         }
 238
 239         sargs->space_slots = 0;
 240         sargs->total_spaces = 0;
 241
 242         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
 243         e = errno;
 244         if (ret) {
 245                 fprintf(stderr,
 246                         "ERROR: couldn't get space info on '%s' - %s\n",
 247                         path, strerror(e));
 248                 free(sargs);
 249                 return NULL;
 250         }
 251         if (!sargs->total_spaces) {
 252                 free(sargs);
 253                 printf("No chunks found\n");
 254                 return NULL;
 255         }
 256
 257         count = sargs->total_spaces;
 258
 259         sargs = realloc(sargs, sizeof(struct btrfs_ioctl_space_args) +
 260                         (count * sizeof(struct btrfs_ioctl_space_info)));
 261         if (!sargs) {
 262                 free(sargs_orig);
 263                 fprintf(stderr, "ERROR: not enough memory\n");
 264                 return NULL;
 265         }
 266
 267         sargs->space_slots = count;
 268         sargs->total_spaces = 0;
 269
 270         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
 271         e = errno;
 272
 273         if (ret) {
 274                 fprintf(stderr,
 275                         "ERROR: couldn't get space info on '%s' - %s\n",
 276                         path, strerror(e));
 277                 free(sargs);
 278                 return NULL;
 279         }
 280
 281         qsort(&(sargs->spaces), count, sizeof(struct btrfs_ioctl_space_info),
 282                 cmp_btrfs_ioctl_space_info);
 283
 284         return sargs;
 285 }
 286
 287 /*
 288  * This function computes the space occuped by a *single* RAID5/RAID6 chunk.
 289  * The computation is performed on the basis of the number of stripes
 290  * which compose the chunk, which could be different from the number of devices
 291  * if a disk is added later.
 292  */
 293 static void get_raid56_used(int fd, struct chunk_info *chunks, int chunkcount,
 294                 u64 *raid5_used, u64 *raid6_used)
 295 {
 296         struct chunk_info *info_ptr = chunks;
 297         *raid5_used = 0;
 298         *raid6_used = 0;
 299
 300         while (chunkcount-- > 0) {
 301                 if (info_ptr->type & BTRFS_BLOCK_GROUP_RAID5)
 302                         (*raid5_used) += info_ptr->size / (info_ptr->num_stripes - 1);
 303                 if (info_ptr->type & BTRFS_BLOCK_GROUP_RAID6)
 304                         (*raid6_used) += info_ptr->size / (info_ptr->num_stripes - 2);
 305                 info_ptr++;
 306         }
 307 }
 308
 309 static int print_filesystem_usage_overall(int fd, struct chunk_info *chunkinfo,
 310                 int chunkcount, struct device_info *devinfo, int devcount,
 311                 char *path, int mode)
 312 {
 313         struct btrfs_ioctl_space_args *sargs = 0;
 314         int i;
 315         int ret = 0;
 316         int e, width;
 317         u64 total_disk;         /* filesystem size == sum of
 318                                    device sizes */
 319         u64 total_chunks;       /* sum of chunks sizes on disk(s) */
 320         u64 total_used;         /* logical space used */
 321         u64 total_free;         /* logical space un-used */
 322         double K;
 323         u64 raid5_used, raid6_used;
 324         u64 global_reserve;
 325         u64 global_reserve_used;
 326
 327         sargs = load_space_info(fd, path);
 328         if (!sargs) {
 329                 ret = 1;
 330                 goto exit;
 331         }
 332
 333         total_disk = disk_size(path);
 334         e = errno;
 335         if (total_disk == 0) {
 336                 fprintf(stderr,
 337                         "ERROR: couldn't get space info on '%s' - %s\n",
 338                         path, strerror(e));
 339
 340                 ret = 1;
 341                 goto exit;
 342         }
 343         get_raid56_used(fd, chunkinfo, chunkcount, &raid5_used, &raid6_used);
 344
 345         total_chunks = 0;
 346         total_used = 0;
 347         total_free = 0;
 348         global_reserve = 0;
 349         global_reserve_used = 0;
 350
 351         for (i = 0; i < sargs->total_spaces; i++) {
 352                 float ratio = 1;
 353                 u64 allocated;
 354                 u64 flags = sargs->spaces[i].flags;
 355
 356                 /*
 357                  * The raid5/raid6 ratio depends by the stripes number
 358                  * used by every chunk. It is computed separately
 359                  */
 360                 if (flags & BTRFS_BLOCK_GROUP_RAID0)
 361                         ratio = 1;
 362                 else if (flags & BTRFS_BLOCK_GROUP_RAID1)
 363                         ratio = 2;
 364                 else if (flags & BTRFS_BLOCK_GROUP_RAID5)
 365                         ratio = 0;
 366                 else if (flags & BTRFS_BLOCK_GROUP_RAID6)
 367                         ratio = 0;
 368                 else if (flags & BTRFS_BLOCK_GROUP_DUP)
 369                         ratio = 2;
 370                 else if (flags & BTRFS_BLOCK_GROUP_RAID10)
 371                         ratio = 2;
 372                 else
 373                         ratio = 1;
 374
 375                 if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV) {
 376                         global_reserve = sargs->spaces[i].total_bytes;
 377                         global_reserve_used = sargs->spaces[i].used_bytes;
 378                 }
 379
 380                 allocated = sargs->spaces[i].total_bytes * ratio;
 381
 382                 total_chunks += allocated;
 383                 total_used += sargs->spaces[i].used_bytes;
 384                 total_free += (sargs->spaces[i].total_bytes -
 385                                         sargs->spaces[i].used_bytes);
 386
 387         }
 388
 389         /* add the raid5/6 allocated space */
 390         total_chunks += raid5_used + raid6_used;
 391
 392         K = ((double)total_used + (double)total_free) / (double)total_chunks;
 393
 394         if (mode == UNITS_HUMAN)
 395                 width = 10;
 396         else
 397                 width = 18;
 398
 399         printf("Overall:\n");
 400
 401         printf("    Device size:\t\t%*s\n", width,
 402                 pretty_size_mode(total_disk, mode));
 403         printf("    Device allocated:\t\t%*s\n", width,
 404                 pretty_size_mode(total_chunks, mode));
 405         printf("    Device unallocated:\t\t%*s\n", width,
 406                 pretty_size_mode(total_disk - total_chunks, mode));
 407         printf("    Used:\t\t\t%*s\n", width,
 408                 pretty_size_mode(total_used, mode));
 409         printf("    Free (Estimated):\t\t%*s\t(",
 410                 width,
 411                 pretty_size_mode((u64)(K * total_disk - total_used), mode));
 412         printf("Max: %s, ",
 413                 pretty_size_mode(total_disk - total_chunks + total_free, mode));
 414         printf("min: %s)\n",
 415                 pretty_size_mode((total_disk-total_chunks) / 2 + total_free, mode));
 416         printf("    Data to device ratio:\t%*.0f %%\n",
 417                 width - 2, K * 100);
 418         printf("    Global reserve:\t\t%*s\t(used: %s)\n", width,
 419                 pretty_size_mode(global_reserve, mode),
 420                 pretty_size_mode(global_reserve_used, mode));
 421
 422 exit:
 423
 424         if (sargs)
 425                 free(sargs);
 426
 427         return ret;
 428 }
 429
 430 /*
 431  *  Helper to sort the device_info structure
 432  */
 433 static int cmp_device_info(const void *a, const void *b)
 434 {
 435         return strcmp(((struct device_info *)a)->path,
 436                         ((struct device_info *)b)->path);
 437 }
 438
 439 /*
 440  *  This function loads the device_info structure and put them in an array
 441  */
 442 static int load_device_info(int fd, struct device_info **device_info_ptr,
 443                            int *device_info_count)
 444 {
 445         int ret, i, ndevs;
 446         struct btrfs_ioctl_fs_info_args fi_args;
 447         struct btrfs_ioctl_dev_info_args dev_info;
 448         struct device_info *info;
 449
 450         *device_info_count = 0;
 451         *device_info_ptr = 0;
 452
 453         ret = ioctl(fd, BTRFS_IOC_FS_INFO, &fi_args);
 454         if (ret == -EPERM)
 455                 return ret;
 456         if (ret < 0) {
 457                 fprintf(stderr, "ERROR: cannot get filesystem info\n");
 458                 return ret;
 459         }
 460
 461         info = calloc(fi_args.num_devices, sizeof(struct device_info));
 462         if (!info) {
 463                 fprintf(stderr, "ERROR: not enough memory\n");
 464                 return ret;
 465         }
 466
 467         for (i = 0, ndevs = 0 ; i <= fi_args.max_id ; i++) {
 468                 BUG_ON(ndevs >= fi_args.num_devices);
 469                 memset(&dev_info, 0, sizeof(dev_info));
 470                 ret = get_device_info(fd, i, &dev_info);
 471
 472                 if (ret == -ENODEV)
 473                         continue;
 474                 if (ret) {
 475                         fprintf(stderr,
 476                             "ERROR: cannot get info about device devid=%d\n",
 477                             i);
 478                         free(info);
 479                         return ret;
 480                 }
 481
 482                 info[ndevs].devid = dev_info.devid;
 483                 strcpy(info[ndevs].path, (char *)dev_info.path);
 484                 info[ndevs].device_size = get_partition_size((char *)dev_info.path);
 485                 info[ndevs].size = dev_info.total_bytes;
 486                 ++ndevs;
 487         }
 488
 489         BUG_ON(ndevs != fi_args.num_devices);
 490         qsort(info, fi_args.num_devices,
 491                 sizeof(struct device_info), cmp_device_info);
 492
 493         *device_info_count = fi_args.num_devices;
 494         *device_info_ptr = info;
 495
 496         return 0;
 497 }
 498
 499 int load_chunk_and_device_info(int fd, struct chunk_info **chunkinfo,
 500                 int *chunkcount, struct device_info **devinfo, int *devcount)
 501 {
 502         int ret;
 503
 504         ret = load_chunk_info(fd, chunkinfo, chunkcount);
 505         if (ret == -EPERM) {
 506                 fprintf(stderr,
 507                         "WARNING: can't read detailed chunk info, RAID5/6 numbers will be incorrect, run as root\n");
 508         } else if (ret) {
 509                 return ret;
 510         }
 511
 512         ret = load_device_info(fd, devinfo, devcount);
 513         if (ret == -EPERM) {
 514                 fprintf(stderr,
 515                         "WARNING: can't get filesystem info from ioctl(FS_INFO), run as root\n");
 516                 ret = 0;
 517         }
 518
 519         return ret;
 520 }
 521
 522 /*
 523  *  This function computes the size of a chunk in a disk
 524  */
 525 static u64 calc_chunk_size(struct chunk_info *ci)
 526 {
 527         if (ci->type & BTRFS_BLOCK_GROUP_RAID0)
 528                 return ci->size / ci->num_stripes;
 529         else if (ci->type & BTRFS_BLOCK_GROUP_RAID1)
 530                 return ci->size ;
 531         else if (ci->type & BTRFS_BLOCK_GROUP_DUP)
 532                 return ci->size ;
 533         else if (ci->type & BTRFS_BLOCK_GROUP_RAID5)
 534                 return ci->size / (ci->num_stripes -1);
 535         else if (ci->type & BTRFS_BLOCK_GROUP_RAID6)
 536                 return ci->size / (ci->num_stripes -2);
 537         else if (ci->type & BTRFS_BLOCK_GROUP_RAID10)
 538                 return ci->size / ci->num_stripes;
 539         return ci->size;
 540 }
 541
 542 /*
 543  *  This function print the results of the command "btrfs fi usage"
 544  *  in tabular format
 545  */
 546 static void _cmd_filesystem_usage_tabular(int mode,
 547                                         struct btrfs_ioctl_space_args *sargs,
 548                                         struct chunk_info *chunks_info_ptr,
 549                                         int chunks_info_count,
 550                                         struct device_info *device_info_ptr,
 551                                         int device_info_count)
 552 {
 553         int i;
 554         u64 total_unused = 0;
 555         struct string_table *matrix = 0;
 556         int  ncols, nrows;
 557
 558         ncols = sargs->total_spaces + 2;
 559         nrows = 2 + 1 + device_info_count + 1 + 2;
 560
 561         matrix = table_create(ncols, nrows);
 562         if (!matrix) {
 563                 fprintf(stderr, "ERROR: not enough memory\n");
 564                 return;
 565         }
 566
 567         /* header */
 568         for (i = 0; i < sargs->total_spaces; i++) {
 569                 const char *description;
 570                 u64 flags = sargs->spaces[i].flags;
 571
 572                 if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 573                         continue;
 574
 575                 description = btrfs_group_type_str(flags);
 576
 577                 table_printf(matrix, 1+i, 0, "<%s", description);
 578         }
 579
 580         for (i = 0; i < sargs->total_spaces; i++) {
 581                 const char *r_mode;
 582
 583                 u64 flags = sargs->spaces[i].flags;
 584                 r_mode = btrfs_group_profile_str(flags);
 585
 586                 table_printf(matrix, 1+i, 1, "<%s", r_mode);
 587         }
 588
 589         table_printf(matrix, 1+sargs->total_spaces, 1, "<Unallocated");
 590
 591         /* body */
 592         for (i = 0; i < device_info_count; i++) {
 593                 int k, col;
 594                 char *p;
 595
 596                 u64  total_allocated = 0, unused;
 597
 598                 p = strrchr(device_info_ptr[i].path, '/');
 599                 if (!p)
 600                         p = device_info_ptr[i].path;
 601                 else
 602                         p++;
 603
 604                 table_printf(matrix, 0, i + 3, "<%s", device_info_ptr[i].path);
 605
 606                 for (col = 1, k = 0 ; k < sargs->total_spaces ; k++)  {
 607                         u64     flags = sargs->spaces[k].flags;
 608                         u64 devid = device_info_ptr[i].devid;
 609                         int     j;
 610                         u64 size = 0;
 611
 612                         for (j = 0 ; j < chunks_info_count ; j++) {
 613                                 if (chunks_info_ptr[j].type != flags )
 614                                                 continue;
 615                                 if (chunks_info_ptr[j].devid != devid)
 616                                                 continue;
 617
 618                                 size += calc_chunk_size(chunks_info_ptr+j);
 619                         }
 620
 621                         if (size)
 622                                 table_printf(matrix, col, i+3,
 623                                         ">%s", pretty_size_mode(size, mode));
 624                         else
 625                                 table_printf(matrix, col, i+3, ">-");
 626
 627                         total_allocated += size;
 628                         col++;
 629                 }
 630
 631                 unused = get_partition_size(device_info_ptr[i].path)
 632                                 - total_allocated;
 633
 634                 table_printf(matrix, sargs->total_spaces + 1, i + 3,
 635                                ">%s", pretty_size_mode(unused, mode));
 636                 total_unused += unused;
 637
 638         }
 639
 640         for (i = 0; i <= sargs->total_spaces; i++)
 641                 table_printf(matrix, i + 1, device_info_count + 3, "=");
 642
 643         /* footer */
 644         table_printf(matrix, 0, device_info_count + 4, "<Total");
 645         for (i = 0; i < sargs->total_spaces; i++)
 646                 table_printf(matrix, 1 + i, device_info_count + 4, ">%s",
 647                         pretty_size_mode(sargs->spaces[i].total_bytes, mode));
 648
 649         table_printf(matrix, sargs->total_spaces + 1, device_info_count + 4,
 650                         ">%s", pretty_size_mode(total_unused, mode));
 651
 652         table_printf(matrix, 0, device_info_count + 5, "<Used");
 653         for (i = 0; i < sargs->total_spaces; i++)
 654                 table_printf(matrix, 1 + i, device_info_count+5, ">%s",
 655                         pretty_size_mode(sargs->spaces[i].used_bytes, mode));
 656
 657         table_dump(matrix);
 658         table_free(matrix);
 659 }
 660
 661 /*
 662  *  This function prints the unused space per every disk
 663  */
 664 static void print_unused(struct chunk_info *info_ptr,
 665                           int info_count,
 666                           struct device_info *device_info_ptr,
 667                           int device_info_count,
 668                           int mode)
 669 {
 670         int i;
 671         for (i = 0; i < device_info_count; i++) {
 672                 int     j;
 673                 u64     total = 0;
 674
 675                 for (j = 0; j < info_count; j++)
 676                         if (info_ptr[j].devid == device_info_ptr[i].devid)
 677                                 total += calc_chunk_size(info_ptr+j);
 678
 679                 printf("   %s\t%10s\n",
 680                         device_info_ptr[i].path,
 681                         pretty_size_mode(device_info_ptr[i].size - total, mode));
 682         }
 683 }
 684
 685 /*
 686  *  This function prints the allocated chunk per every disk
 687  */
 688 static void print_chunk_device(u64 chunk_type,
 689                                 struct chunk_info *chunks_info_ptr,
 690                                 int chunks_info_count,
 691                                 struct device_info *device_info_ptr,
 692                                 int device_info_count,
 693                                 int mode)
 694 {
 695         int i;
 696
 697         for (i = 0; i < device_info_count; i++) {
 698                 int     j;
 699                 u64     total = 0;
 700
 701                 for (j = 0; j < chunks_info_count; j++) {
 702
 703                         if (chunks_info_ptr[j].type != chunk_type)
 704                                 continue;
 705                         if (chunks_info_ptr[j].devid != device_info_ptr[i].devid)
 706                                 continue;
 707
 708                         total += calc_chunk_size(&(chunks_info_ptr[j]));
 709                         //total += chunks_info_ptr[j].size;
 710                 }
 711
 712                 if (total > 0)
 713                         printf("   %s\t%10s\n",
 714                                 device_info_ptr[i].path,
 715                                 pretty_size_mode(total, mode));
 716         }
 717 }
 718
 719 /*
 720  *  This function print the results of the command "btrfs fi usage"
 721  *  in linear format
 722  */
 723 static void _cmd_filesystem_usage_linear(int mode,
 724                                         struct btrfs_ioctl_space_args *sargs,
 725                                         struct chunk_info *info_ptr,
 726                                         int info_count,
 727                                         struct device_info *device_info_ptr,
 728                                         int device_info_count)
 729 {
 730         int i;
 731
 732         for (i = 0; i < sargs->total_spaces; i++) {
 733                 const char *description;
 734                 const char *r_mode;
 735                 u64 flags = sargs->spaces[i].flags;
 736
 737                 if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 738                         continue;
 739
 740                 description = btrfs_group_type_str(flags);
 741                 r_mode = btrfs_group_profile_str(flags);
 742
 743                 printf("%s,%s: Size:%s, ",
 744                         description,
 745                         r_mode,
 746                         pretty_size_mode(sargs->spaces[i].total_bytes,
 747                             mode));
 748                 printf("Used:%s\n",
 749                         pretty_size_mode(sargs->spaces[i].used_bytes, mode));
 750                 print_chunk_device(flags, info_ptr, info_count,
 751                                 device_info_ptr, device_info_count, mode);
 752                 printf("\n");
 753         }
 754
 755         printf("Unallocated:\n");
 756         print_unused(info_ptr, info_count, device_info_ptr, device_info_count,
 757                         mode);
 758 }
 759
 760 static int print_filesystem_usage_by_chunk(int fd,
 761                 struct chunk_info *chunkinfo, int chunkcount,
 762                 struct device_info *devinfo, int devcount,
 763                 char *path, int mode, int tabular)
 764 {
 765         struct btrfs_ioctl_space_args *sargs;
 766         int ret = 0;
 767
 768         if (!chunkinfo)
 769                 return 0;
 770
 771         sargs = load_space_info(fd, path);
 772         if (!sargs) {
 773                 ret = 1;
 774                 goto out;
 775         }
 776
 777         if (tabular)
 778                 _cmd_filesystem_usage_tabular(mode, sargs, chunkinfo,
 779                                 chunkcount, devinfo, devcount);
 780         else
 781                 _cmd_filesystem_usage_linear(mode, sargs, chunkinfo,
 782                                 chunkcount, devinfo, devcount);
 783
 784         free(sargs);
 785 out:
 786         return ret;
 787 }
 788
 789 const char * const cmd_filesystem_usage_usage[] = {
 790         "btrfs filesystem usage [-b][-t] <path> [<path>..]",
 791         "Show in which disk the chunks are allocated.",
 792         "",
 793         "-b\tSet byte as unit",
 794         "-t\tShow data in tabular format",
 795         NULL
 796 };
 797
 798 int cmd_filesystem_usage(int argc, char **argv)
 799 {
 800         int mode = UNITS_HUMAN;
 801         int ret = 0;
 802         int     i, more_than_one = 0;
 803         int     tabular = 0;
 804
 805         optind = 1;
 806         while (1) {
 807                 int c = getopt(argc, argv, "bt");
 808
 809                 if (c < 0)
 810                         break;
 811
 812                 switch (c) {
 813                 case 'b':
 814                         mode = UNITS_RAW;
 815                         break;
 816                 case 't':
 817                         tabular = 1;
 818                         break;
 819                 default:
 820                         usage(cmd_filesystem_usage_usage);
 821                 }
 822         }
 823
 824         if (check_argc_min(argc - optind, 1))
 825                 usage(cmd_filesystem_usage_usage);
 826
 827         for (i = optind; i < argc; i++) {
 828                 int fd;
 829                 DIR *dirstream = NULL;
 830                 struct chunk_info *chunkinfo = NULL;
 831                 struct device_info *devinfo = NULL;
 832                 int chunkcount = 0;
 833                 int devcount = 0;
 834
 835                 fd = open_file_or_dir(argv[i], &dirstream);
 836                 if (fd < 0) {
 837                         fprintf(stderr, "ERROR: can't access '%s'\n",
 838                                 argv[i]);
 839                         ret = 1;
 840                         goto out;
 841                 }
 842                 if (more_than_one)
 843                         printf("\n");
 844
 845                 ret = load_chunk_and_device_info(fd, &chunkinfo, &chunkcount,
 846                                 &devinfo, &devcount);
 847                 if (ret)
 848                         goto cleanup;
 849
 850                 ret = print_filesystem_usage_overall(fd, chunkinfo, chunkcount,
 851                                 devinfo, devcount, argv[i], mode);
 852                 if (ret)
 853                         goto cleanup;
 854                 printf("\n");
 855                 ret = print_filesystem_usage_by_chunk(fd, chunkinfo, chunkcount,
 856                                 devinfo, devcount, argv[i], mode, tabular);
 857 cleanup:
 858                 close_file_or_dir(fd, dirstream);
 859                 free(chunkinfo);
 860                 free(devinfo);
 861
 862                 if (ret)
 863                         goto out;
 864                 more_than_one = 1;
 865         }
 866
 867 out:
 868         return !!ret;
 869 }
 870
 871 void print_device_chunks(int fd, struct device_info *devinfo,
 872                 struct chunk_info *chunks_info_ptr,
 873                 int chunks_info_count, int mode)
 874 {
 875         int i;
 876         u64 allocated = 0;
 877
 878         for (i = 0 ; i < chunks_info_count ; i++) {
 879                 const char *description;
 880                 const char *r_mode;
 881                 u64 flags;
 882                 u64 size;
 883
 884                 if (chunks_info_ptr[i].devid != devinfo->devid)
 885                         continue;
 886
 887                 flags = chunks_info_ptr[i].type;
 888
 889                 description = btrfs_group_type_str(flags);
 890                 r_mode = btrfs_group_profile_str(flags);
 891                 size = calc_chunk_size(chunks_info_ptr+i);
 892                 printf("   %s,%s:%*s%10s\n",
 893                         description,
 894                         r_mode,
 895                         (int)(20 - strlen(description) - strlen(r_mode)), "",
 896                         pretty_size_mode(size, mode));
 897
 898                 allocated += size;
 899
 900         }
 901         printf("   Unallocated: %*s%10s\n",
 902                 (int)(20 - strlen("Unallocated")), "",
 903                 pretty_size_mode(devinfo->size - allocated, mode));
 904 }
 905
 906 void print_device_sizes(int fd, struct device_info *devinfo, int mode)
 907 {
 908         printf("   Device size: %*s%10s\n",
 909                 (int)(20 - strlen("Device size")), "",
 910                 pretty_size_mode(devinfo->device_size, mode));
 911 #if 0
 912         /*
 913          * The term has not seen an agreement and we don't want to change it
 914          * once it's in non-development branches or even released.
 915          */
 916         printf("   FS occupied: %*s%10s\n",
 917                 (int)(20 - strlen("FS occupied")), "",
 918                 pretty_size_mode(devinfo->size, mode));
 919 #endif
 920 }