cmds-fi-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 #include <getopt.h>
  25
  26 #include "utils.h"
  27 #include "kerncompat.h"
  28 #include "ctree.h"
  29 #include "string-table.h"
  30 #include "cmds-fi-usage.h"
  31 #include "commands.h"
  32
  33 #include "version.h"
  34
  35 /*
  36  * Add the chunk info to the chunk_info list
  37  */
  38 static int add_info_to_list(struct chunk_info **info_ptr,
  39                         int *info_count,
  40                         struct btrfs_chunk *chunk)
  41 {
  42
  43         u64 type = btrfs_stack_chunk_type(chunk);
  44         u64 size = btrfs_stack_chunk_length(chunk);
  45         int num_stripes = btrfs_stack_chunk_num_stripes(chunk);
  46         int j;
  47
  48         for (j = 0 ; j < num_stripes ; j++) {
  49                 int i;
  50                 struct chunk_info *p = 0;
  51                 struct btrfs_stripe *stripe;
  52                 u64    devid;
  53
  54                 stripe = btrfs_stripe_nr(chunk, j);
  55                 devid = btrfs_stack_stripe_devid(stripe);
  56
  57                 for (i = 0 ; i < *info_count ; i++)
  58                         if ((*info_ptr)[i].type == type &&
  59                             (*info_ptr)[i].devid == devid &&
  60                             (*info_ptr)[i].num_stripes == num_stripes ) {
  61                                 p = (*info_ptr) + i;
  62                                 break;
  63                         }
  64
  65                 if (!p) {
  66                         int size = sizeof(struct btrfs_chunk) * (*info_count+1);
  67                         struct chunk_info *res = realloc(*info_ptr, size);
  68
  69                         if (!res) {
  70                                 free(*info_ptr);
  71                                 fprintf(stderr, "ERROR: not enough memory\n");
  72                                 return -ENOMEM;
  73                         }
  74
  75                         *info_ptr = res;
  76                         p = res + *info_count;
  77                         (*info_count)++;
  78
  79                         p->devid = devid;
  80                         p->type = type;
  81                         p->size = 0;
  82                         p->num_stripes = num_stripes;
  83                 }
  84
  85                 p->size += size;
  86
  87         }
  88
  89         return 0;
  90
  91 }
  92
  93 /*
  94  *  Helper to sort the chunk type
  95  */
  96 static int cmp_chunk_block_group(u64 f1, u64 f2)
  97 {
  98
  99         u64 mask;
 100
 101         if ((f1 & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
 102                 (f2 & BTRFS_BLOCK_GROUP_TYPE_MASK))
 103                         mask = BTRFS_BLOCK_GROUP_PROFILE_MASK;
 104         else if (f2 & BTRFS_BLOCK_GROUP_SYSTEM)
 105                         return -1;
 106         else if (f1 & BTRFS_BLOCK_GROUP_SYSTEM)
 107                         return +1;
 108         else
 109                         mask = BTRFS_BLOCK_GROUP_TYPE_MASK;
 110
 111         if ((f1 & mask) > (f2 & mask))
 112                 return +1;
 113         else if ((f1 & mask) < (f2 & mask))
 114                 return -1;
 115         else
 116                 return 0;
 117 }
 118
 119 /*
 120  * Helper to sort the chunk
 121  */
 122 static int cmp_chunk_info(const void *a, const void *b)
 123 {
 124         return cmp_chunk_block_group(
 125                 ((struct chunk_info *)a)->type,
 126                 ((struct chunk_info *)b)->type);
 127 }
 128
 129 static int load_chunk_info(int fd, struct chunk_info **info_ptr, int *info_count)
 130 {
 131         int ret;
 132         struct btrfs_ioctl_search_args args;
 133         struct btrfs_ioctl_search_key *sk = &args.key;
 134         struct btrfs_ioctl_search_header *sh;
 135         unsigned long off = 0;
 136         int i, e;
 137
 138         memset(&args, 0, sizeof(args));
 139
 140         /*
 141          * there may be more than one ROOT_ITEM key if there are
 142          * snapshots pending deletion, we have to loop through
 143          * them.
 144          */
 145         sk->tree_id = BTRFS_CHUNK_TREE_OBJECTID;
 146
 147         sk->min_objectid = 0;
 148         sk->max_objectid = (u64)-1;
 149         sk->max_type = 0;
 150         sk->min_type = (u8)-1;
 151         sk->min_offset = 0;
 152         sk->max_offset = (u64)-1;
 153         sk->min_transid = 0;
 154         sk->max_transid = (u64)-1;
 155         sk->nr_items = 4096;
 156
 157         while (1) {
 158                 ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
 159                 e = errno;
 160                 if (e == EPERM)
 161                         return -e;
 162
 163                 if (ret < 0) {
 164                         fprintf(stderr,
 165                                 "ERROR: can't perform the search - %s\n",
 166                                 strerror(e));
 167                         return 1;
 168                 }
 169                 /* the ioctl returns the number of item it found in nr_items */
 170
 171                 if (sk->nr_items == 0)
 172                         break;
 173
 174                 off = 0;
 175                 for (i = 0; i < sk->nr_items; i++) {
 176                         struct btrfs_chunk *item;
 177                         sh = (struct btrfs_ioctl_search_header *)(args.buf +
 178                                                                   off);
 179
 180                         off += sizeof(*sh);
 181                         item = (struct btrfs_chunk *)(args.buf + off);
 182
 183                         ret = add_info_to_list(info_ptr, info_count, item);
 184                         if (ret) {
 185                                 *info_ptr = 0;
 186                                 return 1;
 187                         }
 188
 189                         off += sh->len;
 190
 191                         sk->min_objectid = sh->objectid;
 192                         sk->min_type = sh->type;
 193                         sk->min_offset = sh->offset+1;
 194
 195                 }
 196                 if (!sk->min_offset)    /* overflow */
 197                         sk->min_type++;
 198                 else
 199                         continue;
 200
 201                 if (!sk->min_type)
 202                         sk->min_objectid++;
 203                  else
 204                         continue;
 205
 206                 if (!sk->min_objectid)
 207                         break;
 208         }
 209
 210         qsort(*info_ptr, *info_count, sizeof(struct chunk_info),
 211                 cmp_chunk_info);
 212
 213         return 0;
 214 }
 215
 216 /*
 217  * Helper to sort the struct btrfs_ioctl_space_info
 218  */
 219 static int cmp_btrfs_ioctl_space_info(const void *a, const void *b)
 220 {
 221         return cmp_chunk_block_group(
 222                 ((struct btrfs_ioctl_space_info *)a)->flags,
 223                 ((struct btrfs_ioctl_space_info *)b)->flags);
 224 }
 225
 226 /*
 227  * This function load all the information about the space usage
 228  */
 229 static struct btrfs_ioctl_space_args *load_space_info(int fd, char *path)
 230 {
 231         struct btrfs_ioctl_space_args *sargs = 0, *sargs_orig = 0;
 232         int e, ret, count;
 233
 234         sargs_orig = sargs = calloc(1, sizeof(struct btrfs_ioctl_space_args));
 235         if (!sargs) {
 236                 fprintf(stderr, "ERROR: not enough memory\n");
 237                 return NULL;
 238         }
 239
 240         sargs->space_slots = 0;
 241         sargs->total_spaces = 0;
 242
 243         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
 244         e = errno;
 245         if (ret) {
 246                 fprintf(stderr,
 247                         "ERROR: couldn't get space info on '%s' - %s\n",
 248                         path, strerror(e));
 249                 free(sargs);
 250                 return NULL;
 251         }
 252         if (!sargs->total_spaces) {
 253                 free(sargs);
 254                 printf("No chunks found\n");
 255                 return NULL;
 256         }
 257
 258         count = sargs->total_spaces;
 259
 260         sargs = realloc(sargs, sizeof(struct btrfs_ioctl_space_args) +
 261                         (count * sizeof(struct btrfs_ioctl_space_info)));
 262         if (!sargs) {
 263                 free(sargs_orig);
 264                 fprintf(stderr, "ERROR: not enough memory\n");
 265                 return NULL;
 266         }
 267
 268         sargs->space_slots = count;
 269         sargs->total_spaces = 0;
 270
 271         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
 272         e = errno;
 273
 274         if (ret) {
 275                 fprintf(stderr,
 276                         "ERROR: couldn't get space info on '%s' - %s\n",
 277                         path, strerror(e));
 278                 free(sargs);
 279                 return NULL;
 280         }
 281
 282         qsort(&(sargs->spaces), count, sizeof(struct btrfs_ioctl_space_info),
 283                 cmp_btrfs_ioctl_space_info);
 284
 285         return sargs;
 286 }
 287
 288 /*
 289  * This function computes the space occuped by a *single* RAID5/RAID6 chunk.
 290  * The computation is performed on the basis of the number of stripes
 291  * which compose the chunk, which could be different from the number of devices
 292  * if a disk is added later.
 293  */
 294 static void get_raid56_used(int fd, struct chunk_info *chunks, int chunkcount,
 295                 u64 *raid5_used, u64 *raid6_used)
 296 {
 297         struct chunk_info *info_ptr = chunks;
 298         *raid5_used = 0;
 299         *raid6_used = 0;
 300
 301         while (chunkcount-- > 0) {
 302                 if (info_ptr->type & BTRFS_BLOCK_GROUP_RAID5)
 303                         (*raid5_used) += info_ptr->size / (info_ptr->num_stripes - 1);
 304                 if (info_ptr->type & BTRFS_BLOCK_GROUP_RAID6)
 305                         (*raid6_used) += info_ptr->size / (info_ptr->num_stripes - 2);
 306                 info_ptr++;
 307         }
 308 }
 309
 310 #define MIN_UNALOCATED_THRESH   (16 * 1024 * 1024)
 311 static int print_filesystem_usage_overall(int fd, struct chunk_info *chunkinfo,
 312                 int chunkcount, struct device_info *devinfo, int devcount,
 313                 char *path, unsigned unit_mode)
 314 {
 315         struct btrfs_ioctl_space_args *sargs = 0;
 316         int i;
 317         int ret = 0;
 318         int width = 10;         /* default 10 for human units */
 319         /*
 320          * r_* prefix is for raw data
 321          * l_* is for logical
 322          */
 323         u64 r_total_size = 0;   /* filesystem size, sum of device sizes */
 324         u64 r_total_chunks = 0; /* sum of chunks sizes on disk(s) */
 325         u64 r_total_used = 0;
 326         u64 r_total_unused = 0;
 327         u64 r_total_missing = 0;        /* sum of missing devices size */
 328         u64 r_data_used = 0;
 329         u64 r_data_chunks = 0;
 330         u64 l_data_chunks = 0;
 331         u64 r_metadata_used = 0;
 332         u64 r_metadata_chunks = 0;
 333         u64 l_metadata_chunks = 0;
 334         u64 r_system_used = 0;
 335         u64 r_system_chunks = 0;
 336         double data_ratio;
 337         double metadata_ratio;
 338         /* logical */
 339         u64 raid5_used = 0;
 340         u64 raid6_used = 0;
 341         u64 l_global_reserve = 0;
 342         u64 l_global_reserve_used = 0;
 343         u64 free_estimated = 0;
 344         u64 free_min = 0;
 345         int max_data_ratio = 1;
 346
 347         sargs = load_space_info(fd, path);
 348         if (!sargs) {
 349                 ret = 1;
 350                 goto exit;
 351         }
 352
 353         r_total_size = 0;
 354         for (i = 0; i < devcount; i++) {
 355                 r_total_size += devinfo[i].size;
 356                 if (!devinfo[i].device_size)
 357                         r_total_missing += devinfo[i].size;
 358         }
 359
 360         if (r_total_size == 0) {
 361                 fprintf(stderr,
 362                         "ERROR: couldn't get space info on '%s' - %s\n",
 363                         path, strerror(errno));
 364
 365                 ret = 1;
 366                 goto exit;
 367         }
 368         get_raid56_used(fd, chunkinfo, chunkcount, &raid5_used, &raid6_used);
 369
 370         for (i = 0; i < sargs->total_spaces; i++) {
 371                 int ratio;
 372                 u64 flags = sargs->spaces[i].flags;
 373
 374                 /*
 375                  * The raid5/raid6 ratio depends by the stripes number
 376                  * used by every chunk. It is computed separately
 377                  */
 378                 if (flags & BTRFS_BLOCK_GROUP_RAID0)
 379                         ratio = 1;
 380                 else if (flags & BTRFS_BLOCK_GROUP_RAID1)
 381                         ratio = 2;
 382                 else if (flags & BTRFS_BLOCK_GROUP_RAID5)
 383                         ratio = 0;
 384                 else if (flags & BTRFS_BLOCK_GROUP_RAID6)
 385                         ratio = 0;
 386                 else if (flags & BTRFS_BLOCK_GROUP_DUP)
 387                         ratio = 2;
 388                 else if (flags & BTRFS_BLOCK_GROUP_RAID10)
 389                         ratio = 2;
 390                 else
 391                         ratio = 1;
 392
 393                 if (!ratio)
 394                         fprintf(stderr, "WARNING: RAID56 detected, not implemented\n");
 395
 396                 if (ratio > max_data_ratio)
 397                         max_data_ratio = ratio;
 398
 399                 if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV) {
 400                         l_global_reserve = sargs->spaces[i].total_bytes;
 401                         l_global_reserve_used = sargs->spaces[i].used_bytes;
 402                 }
 403                 if ((flags & (BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA))
 404                         == (BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA)) {
 405                         fprintf(stderr, "WARNING: MIXED blockgroups not handled\n");
 406                 }
 407
 408                 if (flags & BTRFS_BLOCK_GROUP_DATA) {
 409                         r_data_used += sargs->spaces[i].used_bytes * ratio;
 410                         r_data_chunks += sargs->spaces[i].total_bytes * ratio;
 411                         l_data_chunks += sargs->spaces[i].total_bytes;
 412                 }
 413                 if (flags & BTRFS_BLOCK_GROUP_METADATA) {
 414                         r_metadata_used += sargs->spaces[i].used_bytes * ratio;
 415                         r_metadata_chunks += sargs->spaces[i].total_bytes * ratio;
 416                         l_metadata_chunks += sargs->spaces[i].total_bytes;
 417                 }
 418                 if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
 419                         r_system_used += sargs->spaces[i].used_bytes * ratio;
 420                         r_system_chunks += sargs->spaces[i].total_bytes * ratio;
 421                 }
 422         }
 423
 424         r_total_chunks = r_data_chunks + r_metadata_chunks + r_system_chunks;
 425         r_total_used = r_data_used + r_metadata_used + r_system_used;
 426         r_total_unused = r_total_size - r_total_chunks;
 427
 428         /* Raw / Logical = raid factor, >= 1 */
 429         data_ratio = (double)r_data_chunks / l_data_chunks;
 430         metadata_ratio = (double)r_metadata_chunks / l_metadata_chunks;
 431
 432 #if 0
 433         /* add the raid5/6 allocated space */
 434         total_chunks += raid5_used + raid6_used;
 435 #endif
 436
 437         /*
 438          * We're able to fill at least DATA for the unused space
 439          *
 440          * With mixed raid levels, this gives a rough estimate but more
 441          * accurate than just counting the logical free space
 442          * (l_data_chunks - l_data_used)
 443          *
 444          * In non-mixed case there's no difference.
 445          */
 446         free_estimated = (r_data_chunks - r_data_used) / data_ratio;
 447         free_min = free_estimated;
 448
 449         /* Chop unallocatable space */
 450         /* FIXME: must be applied per device */
 451         if (r_total_unused >= MIN_UNALOCATED_THRESH) {
 452                 free_estimated += r_total_unused / data_ratio;
 453                 /* Match the calculation of 'df', use the highest raid ratio */
 454                 free_min += r_total_unused / max_data_ratio;
 455         }
 456
 457         if (unit_mode != UNITS_HUMAN)
 458                 width = 18;
 459
 460         printf("Overall:\n");
 461
 462         printf("    Device size:\t\t%*s\n", width,
 463                 pretty_size_mode(r_total_size, unit_mode));
 464         printf("    Device allocated:\t\t%*s\n", width,
 465                 pretty_size_mode(r_total_chunks, unit_mode));
 466         printf("    Device unallocated:\t\t%*s\n", width,
 467                 pretty_size_mode(r_total_unused, unit_mode));
 468         printf("    Device missing:\t\t%*s\n", width,
 469                 pretty_size_mode(r_total_missing, unit_mode));
 470         printf("    Used:\t\t\t%*s\n", width,
 471                 pretty_size_mode(r_total_used, unit_mode));
 472         printf("    Free (estimated):\t\t%*s\t(",
 473                 width,
 474                 pretty_size_mode(free_estimated, unit_mode));
 475         printf("min: %s)\n", pretty_size_mode(free_min, unit_mode));
 476         printf("    Data ratio:\t\t\t%*.2f\n",
 477                 width, data_ratio);
 478         printf("    Metadata ratio:\t\t%*.2f\n",
 479                 width, metadata_ratio);
 480         printf("    Global reserve:\t\t%*s\t(used: %s)\n", width,
 481                 pretty_size_mode(l_global_reserve, unit_mode),
 482                 pretty_size_mode(l_global_reserve_used, unit_mode));
 483
 484 exit:
 485
 486         if (sargs)
 487                 free(sargs);
 488
 489         return ret;
 490 }
 491
 492 /*
 493  *  Helper to sort the device_info structure
 494  */
 495 static int cmp_device_info(const void *a, const void *b)
 496 {
 497         return strcmp(((struct device_info *)a)->path,
 498                         ((struct device_info *)b)->path);
 499 }
 500
 501 /*
 502  *  This function loads the device_info structure and put them in an array
 503  */
 504 static int load_device_info(int fd, struct device_info **device_info_ptr,
 505                            int *device_info_count)
 506 {
 507         int ret, i, ndevs;
 508         struct btrfs_ioctl_fs_info_args fi_args;
 509         struct btrfs_ioctl_dev_info_args dev_info;
 510         struct device_info *info;
 511
 512         *device_info_count = 0;
 513         *device_info_ptr = 0;
 514
 515         ret = ioctl(fd, BTRFS_IOC_FS_INFO, &fi_args);
 516         if (ret < 0) {
 517                 if (errno == EPERM)
 518                         return -errno;
 519                 fprintf(stderr, "ERROR: cannot get filesystem info - %s\n",
 520                                 strerror(errno));
 521                 return 1;
 522         }
 523
 524         info = calloc(fi_args.num_devices, sizeof(struct device_info));
 525         if (!info) {
 526                 fprintf(stderr, "ERROR: not enough memory\n");
 527                 return 1;
 528         }
 529
 530         for (i = 0, ndevs = 0 ; i <= fi_args.max_id ; i++) {
 531                 BUG_ON(ndevs >= fi_args.num_devices);
 532                 memset(&dev_info, 0, sizeof(dev_info));
 533                 ret = get_device_info(fd, i, &dev_info);
 534
 535                 if (ret == -ENODEV)
 536                         continue;
 537                 if (ret) {
 538                         fprintf(stderr,
 539                             "ERROR: cannot get info about device devid=%d\n",
 540                             i);
 541                         free(info);
 542                         return ret;
 543                 }
 544
 545                 info[ndevs].devid = dev_info.devid;
 546                 if (!dev_info.path[0]) {
 547                         strcpy(info[ndevs].path, "missing");
 548                 } else {
 549                         strcpy(info[ndevs].path, (char *)dev_info.path);
 550                         info[ndevs].device_size =
 551                                 get_partition_size((char *)dev_info.path);
 552                 }
 553                 info[ndevs].size = dev_info.total_bytes;
 554                 ++ndevs;
 555         }
 556
 557         BUG_ON(ndevs != fi_args.num_devices);
 558         qsort(info, fi_args.num_devices,
 559                 sizeof(struct device_info), cmp_device_info);
 560
 561         *device_info_count = fi_args.num_devices;
 562         *device_info_ptr = info;
 563
 564         return 0;
 565 }
 566
 567 int load_chunk_and_device_info(int fd, struct chunk_info **chunkinfo,
 568                 int *chunkcount, struct device_info **devinfo, int *devcount)
 569 {
 570         int ret;
 571
 572         ret = load_chunk_info(fd, chunkinfo, chunkcount);
 573         if (ret == -EPERM) {
 574                 fprintf(stderr,
 575                         "WARNING: can't read detailed chunk info, RAID5/6 numbers will be incorrect, run as root\n");
 576         } else if (ret) {
 577                 return ret;
 578         }
 579
 580         ret = load_device_info(fd, devinfo, devcount);
 581         if (ret == -EPERM) {
 582                 fprintf(stderr,
 583                         "WARNING: can't get filesystem info from ioctl(FS_INFO), run as root\n");
 584                 ret = 0;
 585         }
 586
 587         return ret;
 588 }
 589
 590 /*
 591  *  This function computes the size of a chunk in a disk
 592  */
 593 static u64 calc_chunk_size(struct chunk_info *ci)
 594 {
 595         if (ci->type & BTRFS_BLOCK_GROUP_RAID0)
 596                 return ci->size / ci->num_stripes;
 597         else if (ci->type & BTRFS_BLOCK_GROUP_RAID1)
 598                 return ci->size ;
 599         else if (ci->type & BTRFS_BLOCK_GROUP_DUP)
 600                 return ci->size ;
 601         else if (ci->type & BTRFS_BLOCK_GROUP_RAID5)
 602                 return ci->size / (ci->num_stripes -1);
 603         else if (ci->type & BTRFS_BLOCK_GROUP_RAID6)
 604                 return ci->size / (ci->num_stripes -2);
 605         else if (ci->type & BTRFS_BLOCK_GROUP_RAID10)
 606                 return ci->size / ci->num_stripes;
 607         return ci->size;
 608 }
 609
 610 /*
 611  *  This function print the results of the command "btrfs fi usage"
 612  *  in tabular format
 613  */
 614 static void _cmd_filesystem_usage_tabular(unsigned unit_mode,
 615                                         struct btrfs_ioctl_space_args *sargs,
 616                                         struct chunk_info *chunks_info_ptr,
 617                                         int chunks_info_count,
 618                                         struct device_info *device_info_ptr,
 619                                         int device_info_count)
 620 {
 621         int i;
 622         u64 total_unused = 0;
 623         struct string_table *matrix = 0;
 624         int  ncols, nrows;
 625         int col;
 626         int unallocated_col;
 627         int spaceinfos_col;
 628         const int vhdr_skip = 3;        /* amount of vertical header space */
 629
 630         /* path, unallocated */
 631         ncols = 2;
 632         spaceinfos_col = 1;
 633         /* Properly count the real space infos */
 634         for (i = 0; i < sargs->total_spaces; i++) {
 635                 if (sargs->spaces[i].flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 636                         continue;
 637                 ncols++;
 638         }
 639
 640         /* 2 for header, empty line, devices, ===, total, used */
 641         nrows = vhdr_skip + device_info_count + 1 + 2;
 642
 643         matrix = table_create(ncols, nrows);
 644         if (!matrix) {
 645                 fprintf(stderr, "ERROR: not enough memory\n");
 646                 return;
 647         }
 648
 649         /*
 650          * We have to skip the global block reserve everywhere as it's an
 651          * artificial blockgroup
 652          */
 653
 654         /* header */
 655         for (i = 0, col = spaceinfos_col; i < sargs->total_spaces; i++) {
 656                 u64 flags = sargs->spaces[i].flags;
 657
 658                 if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 659                         continue;
 660
 661                 table_printf(matrix, col, 0, "<%s",
 662                                 btrfs_group_type_str(flags));
 663                 table_printf(matrix, col, 1, "<%s",
 664                                 btrfs_group_profile_str(flags));
 665                 col++;
 666         }
 667         unallocated_col = col;
 668
 669         table_printf(matrix, 0, 1, "<Path");
 670         table_printf(matrix, unallocated_col, 1, "<Unallocated");
 671
 672         /* body */
 673         for (i = 0; i < device_info_count; i++) {
 674                 int k;
 675                 char *p;
 676
 677                 u64  total_allocated = 0, unused;
 678
 679                 p = strrchr(device_info_ptr[i].path, '/');
 680                 if (!p)
 681                         p = device_info_ptr[i].path;
 682                 else
 683                         p++;
 684
 685                 table_printf(matrix, 0, vhdr_skip + i, "<%s",
 686                                 device_info_ptr[i].path);
 687
 688                 for (col = spaceinfos_col, k = 0; k < sargs->total_spaces; k++) {
 689                         u64     flags = sargs->spaces[k].flags;
 690                         u64 devid = device_info_ptr[i].devid;
 691                         int     j;
 692                         u64 size = 0;
 693
 694                         if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 695                                 continue;
 696
 697                         for (j = 0 ; j < chunks_info_count ; j++) {
 698                                 if (chunks_info_ptr[j].type != flags )
 699                                                 continue;
 700                                 if (chunks_info_ptr[j].devid != devid)
 701                                                 continue;
 702
 703                                 size += calc_chunk_size(chunks_info_ptr+j);
 704                         }
 705
 706                         if (size)
 707                                 table_printf(matrix, col, vhdr_skip+ i,
 708                                         ">%s", pretty_size_mode(size, unit_mode));
 709                         else
 710                                 table_printf(matrix, col, vhdr_skip + i, ">-");
 711
 712                         total_allocated += size;
 713                         col++;
 714                 }
 715
 716                 unused = get_partition_size(device_info_ptr[i].path)
 717                                 - total_allocated;
 718
 719                 table_printf(matrix, unallocated_col, vhdr_skip + i,
 720                                ">%s", pretty_size_mode(unused, unit_mode));
 721                 total_unused += unused;
 722
 723         }
 724
 725         for (i = 0, col = spaceinfos_col; i < sargs->total_spaces; i++) {
 726                 if (sargs->spaces[i].flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 727                         continue;
 728
 729                 table_printf(matrix, col++, vhdr_skip + device_info_count, "=");
 730         }
 731         /* One for Unallocated */
 732         table_printf(matrix, col, vhdr_skip + device_info_count, "=");
 733
 734         /* footer */
 735         table_printf(matrix, 0, vhdr_skip + device_info_count + 1, "<Total");
 736         for (i = 0, col = spaceinfos_col; i < sargs->total_spaces; i++) {
 737                 if (sargs->spaces[i].flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 738                         continue;
 739
 740                 table_printf(matrix, col++, vhdr_skip + device_info_count + 1,
 741                         ">%s",
 742                         pretty_size_mode(sargs->spaces[i].total_bytes, unit_mode));
 743         }
 744
 745         table_printf(matrix, unallocated_col, vhdr_skip + device_info_count + 1,
 746                         ">%s", pretty_size_mode(total_unused, unit_mode));
 747
 748         table_printf(matrix, 0, vhdr_skip + device_info_count + 2, "<Used");
 749         for (i = 0, col = spaceinfos_col; i < sargs->total_spaces; i++) {
 750                 if (sargs->spaces[i].flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 751                         continue;
 752
 753                 table_printf(matrix, col++, vhdr_skip + device_info_count + 2,
 754                         ">%s",
 755                         pretty_size_mode(sargs->spaces[i].used_bytes, unit_mode));
 756         }
 757
 758         table_dump(matrix);
 759         table_free(matrix);
 760 }
 761
 762 /*
 763  *  This function prints the unused space per every disk
 764  */
 765 static void print_unused(struct chunk_info *info_ptr,
 766                           int info_count,
 767                           struct device_info *device_info_ptr,
 768                           int device_info_count,
 769                           unsigned unit_mode)
 770 {
 771         int i;
 772         for (i = 0; i < device_info_count; i++) {
 773                 int     j;
 774                 u64     total = 0;
 775
 776                 for (j = 0; j < info_count; j++)
 777                         if (info_ptr[j].devid == device_info_ptr[i].devid)
 778                                 total += calc_chunk_size(info_ptr+j);
 779
 780                 printf("   %s\t%10s\n",
 781                         device_info_ptr[i].path,
 782                         pretty_size_mode(device_info_ptr[i].size - total,
 783                                 unit_mode));
 784         }
 785 }
 786
 787 /*
 788  *  This function prints the allocated chunk per every disk
 789  */
 790 static void print_chunk_device(u64 chunk_type,
 791                                 struct chunk_info *chunks_info_ptr,
 792                                 int chunks_info_count,
 793                                 struct device_info *device_info_ptr,
 794                                 int device_info_count,
 795                                 unsigned unit_mode)
 796 {
 797         int i;
 798
 799         for (i = 0; i < device_info_count; i++) {
 800                 int     j;
 801                 u64     total = 0;
 802
 803                 for (j = 0; j < chunks_info_count; j++) {
 804
 805                         if (chunks_info_ptr[j].type != chunk_type)
 806                                 continue;
 807                         if (chunks_info_ptr[j].devid != device_info_ptr[i].devid)
 808                                 continue;
 809
 810                         total += calc_chunk_size(&(chunks_info_ptr[j]));
 811                         //total += chunks_info_ptr[j].size;
 812                 }
 813
 814                 if (total > 0)
 815                         printf("   %s\t%10s\n",
 816                                 device_info_ptr[i].path,
 817                                 pretty_size_mode(total, unit_mode));
 818         }
 819 }
 820
 821 /*
 822  *  This function print the results of the command "btrfs fi usage"
 823  *  in linear format
 824  */
 825 static void _cmd_filesystem_usage_linear(unsigned unit_mode,
 826                                         struct btrfs_ioctl_space_args *sargs,
 827                                         struct chunk_info *info_ptr,
 828                                         int info_count,
 829                                         struct device_info *device_info_ptr,
 830                                         int device_info_count)
 831 {
 832         int i;
 833
 834         for (i = 0; i < sargs->total_spaces; i++) {
 835                 const char *description;
 836                 const char *r_mode;
 837                 u64 flags = sargs->spaces[i].flags;
 838
 839                 if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 840                         continue;
 841
 842                 description = btrfs_group_type_str(flags);
 843                 r_mode = btrfs_group_profile_str(flags);
 844
 845                 printf("%s,%s: Size:%s, ",
 846                         description,
 847                         r_mode,
 848                         pretty_size_mode(sargs->spaces[i].total_bytes,
 849                                 unit_mode));
 850                 printf("Used:%s\n",
 851                         pretty_size_mode(sargs->spaces[i].used_bytes, unit_mode));
 852                 print_chunk_device(flags, info_ptr, info_count,
 853                                 device_info_ptr, device_info_count, unit_mode);
 854                 printf("\n");
 855         }
 856
 857         printf("Unallocated:\n");
 858         print_unused(info_ptr, info_count, device_info_ptr, device_info_count,
 859                         unit_mode);
 860 }
 861
 862 static int print_filesystem_usage_by_chunk(int fd,
 863                 struct chunk_info *chunkinfo, int chunkcount,
 864                 struct device_info *devinfo, int devcount,
 865                 char *path, unsigned unit_mode, int tabular)
 866 {
 867         struct btrfs_ioctl_space_args *sargs;
 868         int ret = 0;
 869
 870         if (!chunkinfo)
 871                 return 0;
 872
 873         sargs = load_space_info(fd, path);
 874         if (!sargs) {
 875                 ret = 1;
 876                 goto out;
 877         }
 878
 879         if (tabular)
 880                 _cmd_filesystem_usage_tabular(unit_mode, sargs, chunkinfo,
 881                                 chunkcount, devinfo, devcount);
 882         else
 883                 _cmd_filesystem_usage_linear(unit_mode, sargs, chunkinfo,
 884                                 chunkcount, devinfo, devcount);
 885
 886         free(sargs);
 887 out:
 888         return ret;
 889 }
 890
 891 const char * const cmd_filesystem_usage_usage[] = {
 892         "btrfs filesystem usage [options] <path> [<path>..]",
 893         "Show detailed information about internal filesystem usage .",
 894         HELPINFO_OUTPUT_UNIT_DF,
 895         "-T                 show data in tabular format",
 896         NULL
 897 };
 898
 899 int cmd_filesystem_usage(int argc, char **argv)
 900 {
 901         int ret = 0;
 902         unsigned unit_mode;
 903         int i;
 904         int more_than_one = 0;
 905         int tabular = 0;
 906
 907         unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
 908
 909         optind = 1;
 910         while (1) {
 911                 int c;
 912
 913                 c = getopt(argc, argv, "T");
 914                 if (c < 0)
 915                         break;
 916
 917                 switch (c) {
 918                 case 'T':
 919                         tabular = 1;
 920                         break;
 921                 default:
 922                         usage(cmd_filesystem_usage_usage);
 923                 }
 924         }
 925
 926         if (check_argc_min(argc - optind, 1))
 927                 usage(cmd_filesystem_usage_usage);
 928
 929         for (i = optind; i < argc; i++) {
 930                 int fd;
 931                 DIR *dirstream = NULL;
 932                 struct chunk_info *chunkinfo = NULL;
 933                 struct device_info *devinfo = NULL;
 934                 int chunkcount = 0;
 935                 int devcount = 0;
 936
 937                 fd = btrfs_open_dir(argv[i], &dirstream, 1);
 938                 if (fd < 0) {
 939                         ret = 1;
 940                         goto out;
 941                 }
 942                 if (more_than_one)
 943                         printf("\n");
 944
 945                 ret = load_chunk_and_device_info(fd, &chunkinfo, &chunkcount,
 946                                 &devinfo, &devcount);
 947                 if (ret)
 948                         goto cleanup;
 949
 950                 ret = print_filesystem_usage_overall(fd, chunkinfo, chunkcount,
 951                                 devinfo, devcount, argv[i], unit_mode);
 952                 if (ret)
 953                         goto cleanup;
 954                 printf("\n");
 955                 ret = print_filesystem_usage_by_chunk(fd, chunkinfo, chunkcount,
 956                                 devinfo, devcount, argv[i], unit_mode, tabular);
 957 cleanup:
 958                 close_file_or_dir(fd, dirstream);
 959                 free(chunkinfo);
 960                 free(devinfo);
 961
 962                 if (ret)
 963                         goto out;
 964                 more_than_one = 1;
 965         }
 966
 967 out:
 968         return !!ret;
 969 }
 970
 971 void print_device_chunks(int fd, struct device_info *devinfo,
 972                 struct chunk_info *chunks_info_ptr,
 973                 int chunks_info_count, unsigned unit_mode)
 974 {
 975         int i;
 976         u64 allocated = 0;
 977
 978         for (i = 0 ; i < chunks_info_count ; i++) {
 979                 const char *description;
 980                 const char *r_mode;
 981                 u64 flags;
 982                 u64 size;
 983
 984                 if (chunks_info_ptr[i].devid != devinfo->devid)
 985                         continue;
 986
 987                 flags = chunks_info_ptr[i].type;
 988
 989                 description = btrfs_group_type_str(flags);
 990                 r_mode = btrfs_group_profile_str(flags);
 991                 size = calc_chunk_size(chunks_info_ptr+i);
 992                 printf("   %s,%s:%*s%10s\n",
 993                         description,
 994                         r_mode,
 995                         (int)(20 - strlen(description) - strlen(r_mode)), "",
 996                         pretty_size_mode(size, unit_mode));
 997
 998                 allocated += size;
 999
1000         }
1001         printf("   Unallocated: %*s%10s\n",
1002                 (int)(20 - strlen("Unallocated")), "",
1003                 pretty_size_mode(devinfo->size - allocated, unit_mode));
1004 }
1005
1006 void print_device_sizes(int fd, struct device_info *devinfo, unsigned unit_mode)
1007 {
1008         printf("   Device size: %*s%10s\n",
1009                 (int)(20 - strlen("Device size")), "",
1010                 pretty_size_mode(devinfo->device_size, unit_mode));
1011 #if 0
1012         /*
1013          * The term has not seen an agreement and we don't want to change it
1014          * once it's in non-development branches or even released.
1015          */
1016         printf("   FS occupied: %*s%10s\n",
1017                 (int)(20 - strlen("FS occupied")), "",
1018                 pretty_size_mode(devinfo->size, unit_mode));
1019 #endif
1020 }