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 = NULL;
  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                                 error("not enough memory");
  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                         error("cannot look up chunk tree info: %s",
 165                                 strerror(e));
 166                         return 1;
 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 = NULL;
 185                                 return 1;
 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 = NULL, *sargs_orig = NULL;
 231         int e, ret, count;
 232
 233         sargs_orig = sargs = calloc(1, sizeof(struct btrfs_ioctl_space_args));
 234         if (!sargs) {
 235                 error("not enough memory");
 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                 error("cannot get space info on '%s': %s", path, strerror(e));
 246                 free(sargs);
 247                 return NULL;
 248         }
 249         if (!sargs->total_spaces) {
 250                 free(sargs);
 251                 printf("No chunks found\n");
 252                 return NULL;
 253         }
 254
 255         count = sargs->total_spaces;
 256
 257         sargs = realloc(sargs, sizeof(struct btrfs_ioctl_space_args) +
 258                         (count * sizeof(struct btrfs_ioctl_space_info)));
 259         if (!sargs) {
 260                 free(sargs_orig);
 261                 error("not enough memory");
 262                 return NULL;
 263         }
 264
 265         sargs->space_slots = count;
 266         sargs->total_spaces = 0;
 267
 268         ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
 269         e = errno;
 270
 271         if (ret) {
 272                 error("cannot get space info with %u slots: %s",
 273                         count, strerror(e));
 274                 free(sargs);
 275                 return NULL;
 276         }
 277
 278         qsort(&(sargs->spaces), count, sizeof(struct btrfs_ioctl_space_info),
 279                 cmp_btrfs_ioctl_space_info);
 280
 281         return sargs;
 282 }
 283
 284 /*
 285  * This function computes the space occuped by a *single* RAID5/RAID6 chunk.
 286  * The computation is performed on the basis of the number of stripes
 287  * which compose the chunk, which could be different from the number of devices
 288  * if a disk is added later.
 289  */
 290 static void get_raid56_used(int fd, struct chunk_info *chunks, int chunkcount,
 291                 u64 *raid5_used, u64 *raid6_used)
 292 {
 293         struct chunk_info *info_ptr = chunks;
 294         *raid5_used = 0;
 295         *raid6_used = 0;
 296
 297         while (chunkcount-- > 0) {
 298                 if (info_ptr->type & BTRFS_BLOCK_GROUP_RAID5)
 299                         (*raid5_used) += info_ptr->size / (info_ptr->num_stripes - 1);
 300                 if (info_ptr->type & BTRFS_BLOCK_GROUP_RAID6)
 301                         (*raid6_used) += info_ptr->size / (info_ptr->num_stripes - 2);
 302                 info_ptr++;
 303         }
 304 }
 305
 306 #define MIN_UNALOCATED_THRESH   (16 * 1024 * 1024)
 307 static int print_filesystem_usage_overall(int fd, struct chunk_info *chunkinfo,
 308                 int chunkcount, struct device_info *devinfo, int devcount,
 309                 char *path, unsigned unit_mode)
 310 {
 311         struct btrfs_ioctl_space_args *sargs = NULL;
 312         int i;
 313         int ret = 0;
 314         int width = 10;         /* default 10 for human units */
 315         /*
 316          * r_* prefix is for raw data
 317          * l_* is for logical
 318          */
 319         u64 r_total_size = 0;   /* filesystem size, sum of device sizes */
 320         u64 r_total_chunks = 0; /* sum of chunks sizes on disk(s) */
 321         u64 r_total_used = 0;
 322         u64 r_total_unused = 0;
 323         u64 r_total_missing = 0;        /* sum of missing devices size */
 324         u64 r_data_used = 0;
 325         u64 r_data_chunks = 0;
 326         u64 l_data_chunks = 0;
 327         u64 r_metadata_used = 0;
 328         u64 r_metadata_chunks = 0;
 329         u64 l_metadata_chunks = 0;
 330         u64 r_system_used = 0;
 331         u64 r_system_chunks = 0;
 332         double data_ratio;
 333         double metadata_ratio;
 334         /* logical */
 335         u64 raid5_used = 0;
 336         u64 raid6_used = 0;
 337         u64 l_global_reserve = 0;
 338         u64 l_global_reserve_used = 0;
 339         u64 free_estimated = 0;
 340         u64 free_min = 0;
 341         int max_data_ratio = 1;
 342
 343         sargs = load_space_info(fd, path);
 344         if (!sargs) {
 345                 ret = 1;
 346                 goto exit;
 347         }
 348
 349         r_total_size = 0;
 350         for (i = 0; i < devcount; i++) {
 351                 r_total_size += devinfo[i].size;
 352                 if (!devinfo[i].device_size)
 353                         r_total_missing += devinfo[i].size;
 354         }
 355
 356         if (r_total_size == 0) {
 357                 error("cannot get space info on '%s': %s",
 358                         path, strerror(errno));
 359
 360                 ret = 1;
 361                 goto exit;
 362         }
 363         get_raid56_used(fd, chunkinfo, chunkcount, &raid5_used, &raid6_used);
 364
 365         for (i = 0; i < sargs->total_spaces; i++) {
 366                 int ratio;
 367                 u64 flags = sargs->spaces[i].flags;
 368
 369                 /*
 370                  * The raid5/raid6 ratio depends by the stripes number
 371                  * used by every chunk. It is computed separately
 372                  */
 373                 if (flags & BTRFS_BLOCK_GROUP_RAID0)
 374                         ratio = 1;
 375                 else if (flags & BTRFS_BLOCK_GROUP_RAID1)
 376                         ratio = 2;
 377                 else if (flags & BTRFS_BLOCK_GROUP_RAID5)
 378                         ratio = 0;
 379                 else if (flags & BTRFS_BLOCK_GROUP_RAID6)
 380                         ratio = 0;
 381                 else if (flags & BTRFS_BLOCK_GROUP_DUP)
 382                         ratio = 2;
 383                 else if (flags & BTRFS_BLOCK_GROUP_RAID10)
 384                         ratio = 2;
 385                 else
 386                         ratio = 1;
 387
 388                 if (!ratio)
 389                         warning("RAID56 detected, not implemented");
 390
 391                 if (ratio > max_data_ratio)
 392                         max_data_ratio = ratio;
 393
 394                 if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV) {
 395                         l_global_reserve = sargs->spaces[i].total_bytes;
 396                         l_global_reserve_used = sargs->spaces[i].used_bytes;
 397                 }
 398                 if ((flags & (BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA))
 399                         == (BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA)) {
 400                         warning("MIXED blockgroups not handled");
 401                 }
 402
 403                 if (flags & BTRFS_BLOCK_GROUP_DATA) {
 404                         r_data_used += sargs->spaces[i].used_bytes * ratio;
 405                         r_data_chunks += sargs->spaces[i].total_bytes * ratio;
 406                         l_data_chunks += sargs->spaces[i].total_bytes;
 407                 }
 408                 if (flags & BTRFS_BLOCK_GROUP_METADATA) {
 409                         r_metadata_used += sargs->spaces[i].used_bytes * ratio;
 410                         r_metadata_chunks += sargs->spaces[i].total_bytes * ratio;
 411                         l_metadata_chunks += sargs->spaces[i].total_bytes;
 412                 }
 413                 if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
 414                         r_system_used += sargs->spaces[i].used_bytes * ratio;
 415                         r_system_chunks += sargs->spaces[i].total_bytes * ratio;
 416                 }
 417         }
 418
 419         r_total_chunks = r_data_chunks + r_metadata_chunks + r_system_chunks;
 420         r_total_used = r_data_used + r_metadata_used + r_system_used;
 421         r_total_unused = r_total_size - r_total_chunks;
 422
 423         /* Raw / Logical = raid factor, >= 1 */
 424         data_ratio = (double)r_data_chunks / l_data_chunks;
 425         metadata_ratio = (double)r_metadata_chunks / l_metadata_chunks;
 426
 427 #if 0
 428         /* add the raid5/6 allocated space */
 429         total_chunks += raid5_used + raid6_used;
 430 #endif
 431
 432         /*
 433          * We're able to fill at least DATA for the unused space
 434          *
 435          * With mixed raid levels, this gives a rough estimate but more
 436          * accurate than just counting the logical free space
 437          * (l_data_chunks - l_data_used)
 438          *
 439          * In non-mixed case there's no difference.
 440          */
 441         free_estimated = (r_data_chunks - r_data_used) / data_ratio;
 442         free_min = free_estimated;
 443
 444         /* Chop unallocatable space */
 445         /* FIXME: must be applied per device */
 446         if (r_total_unused >= MIN_UNALOCATED_THRESH) {
 447                 free_estimated += r_total_unused / data_ratio;
 448                 /* Match the calculation of 'df', use the highest raid ratio */
 449                 free_min += r_total_unused / max_data_ratio;
 450         }
 451
 452         if (unit_mode != UNITS_HUMAN)
 453                 width = 18;
 454
 455         printf("Overall:\n");
 456
 457         printf("    Device size:\t\t%*s\n", width,
 458                 pretty_size_mode(r_total_size, unit_mode));
 459         printf("    Device allocated:\t\t%*s\n", width,
 460                 pretty_size_mode(r_total_chunks, unit_mode));
 461         printf("    Device unallocated:\t\t%*s\n", width,
 462                 pretty_size_mode(r_total_unused, unit_mode));
 463         printf("    Device missing:\t\t%*s\n", width,
 464                 pretty_size_mode(r_total_missing, unit_mode));
 465         printf("    Used:\t\t\t%*s\n", width,
 466                 pretty_size_mode(r_total_used, unit_mode));
 467         printf("    Free (estimated):\t\t%*s\t(",
 468                 width,
 469                 pretty_size_mode(free_estimated, unit_mode));
 470         printf("min: %s)\n", pretty_size_mode(free_min, unit_mode));
 471         printf("    Data ratio:\t\t\t%*.2f\n",
 472                 width, data_ratio);
 473         printf("    Metadata ratio:\t\t%*.2f\n",
 474                 width, metadata_ratio);
 475         printf("    Global reserve:\t\t%*s\t(used: %s)\n", width,
 476                 pretty_size_mode(l_global_reserve, unit_mode),
 477                 pretty_size_mode(l_global_reserve_used, unit_mode));
 478
 479 exit:
 480
 481         if (sargs)
 482                 free(sargs);
 483
 484         return ret;
 485 }
 486
 487 /*
 488  *  Helper to sort the device_info structure
 489  */
 490 static int cmp_device_info(const void *a, const void *b)
 491 {
 492         return strcmp(((struct device_info *)a)->path,
 493                         ((struct device_info *)b)->path);
 494 }
 495
 496 /*
 497  *  This function loads the device_info structure and put them in an array
 498  */
 499 static int load_device_info(int fd, struct device_info **device_info_ptr,
 500                            int *device_info_count)
 501 {
 502         int ret, i, ndevs;
 503         struct btrfs_ioctl_fs_info_args fi_args;
 504         struct btrfs_ioctl_dev_info_args dev_info;
 505         struct device_info *info;
 506
 507         *device_info_count = 0;
 508         *device_info_ptr = NULL;
 509
 510         ret = ioctl(fd, BTRFS_IOC_FS_INFO, &fi_args);
 511         if (ret < 0) {
 512                 if (errno == EPERM)
 513                         return -errno;
 514                 error("cannot get filesystem info: %s",
 515                                 strerror(errno));
 516                 return 1;
 517         }
 518
 519         info = calloc(fi_args.num_devices, sizeof(struct device_info));
 520         if (!info) {
 521                 error("not enough memory");
 522                 return 1;
 523         }
 524
 525         for (i = 0, ndevs = 0 ; i <= fi_args.max_id ; i++) {
 526                 BUG_ON(ndevs >= fi_args.num_devices);
 527                 memset(&dev_info, 0, sizeof(dev_info));
 528                 ret = get_device_info(fd, i, &dev_info);
 529
 530                 if (ret == -ENODEV)
 531                         continue;
 532                 if (ret) {
 533                         error("cannot get info about device devid=%d", i);
 534                         free(info);
 535                         return ret;
 536                 }
 537
 538                 info[ndevs].devid = dev_info.devid;
 539                 if (!dev_info.path[0]) {
 540                         strcpy(info[ndevs].path, "missing");
 541                 } else {
 542                         strcpy(info[ndevs].path, (char *)dev_info.path);
 543                         info[ndevs].device_size =
 544                                 get_partition_size((char *)dev_info.path);
 545                 }
 546                 info[ndevs].size = dev_info.total_bytes;
 547                 ++ndevs;
 548         }
 549
 550         BUG_ON(ndevs != fi_args.num_devices);
 551         qsort(info, fi_args.num_devices,
 552                 sizeof(struct device_info), cmp_device_info);
 553
 554         *device_info_count = fi_args.num_devices;
 555         *device_info_ptr = info;
 556
 557         return 0;
 558 }
 559
 560 int load_chunk_and_device_info(int fd, struct chunk_info **chunkinfo,
 561                 int *chunkcount, struct device_info **devinfo, int *devcount)
 562 {
 563         int ret;
 564
 565         ret = load_chunk_info(fd, chunkinfo, chunkcount);
 566         if (ret == -EPERM) {
 567                 warning(
 568 "cannot read detailed chunk info, RAID5/6 numbers will be incorrect, run as root");
 569         } else if (ret) {
 570                 return ret;
 571         }
 572
 573         ret = load_device_info(fd, devinfo, devcount);
 574         if (ret == -EPERM) {
 575                 warning(
 576                 "cannot get filesystem info from ioctl(FS_INFO), run as root");
 577                 ret = 0;
 578         }
 579
 580         return ret;
 581 }
 582
 583 /*
 584  *  This function computes the size of a chunk in a disk
 585  */
 586 static u64 calc_chunk_size(struct chunk_info *ci)
 587 {
 588         if (ci->type & BTRFS_BLOCK_GROUP_RAID0)
 589                 return ci->size / ci->num_stripes;
 590         else if (ci->type & BTRFS_BLOCK_GROUP_RAID1)
 591                 return ci->size ;
 592         else if (ci->type & BTRFS_BLOCK_GROUP_DUP)
 593                 return ci->size ;
 594         else if (ci->type & BTRFS_BLOCK_GROUP_RAID5)
 595                 return ci->size / (ci->num_stripes -1);
 596         else if (ci->type & BTRFS_BLOCK_GROUP_RAID6)
 597                 return ci->size / (ci->num_stripes -2);
 598         else if (ci->type & BTRFS_BLOCK_GROUP_RAID10)
 599                 return ci->size / ci->num_stripes;
 600         return ci->size;
 601 }
 602
 603 /*
 604  *  This function print the results of the command "btrfs fi usage"
 605  *  in tabular format
 606  */
 607 static void _cmd_filesystem_usage_tabular(unsigned unit_mode,
 608                                         struct btrfs_ioctl_space_args *sargs,
 609                                         struct chunk_info *chunks_info_ptr,
 610                                         int chunks_info_count,
 611                                         struct device_info *device_info_ptr,
 612                                         int device_info_count)
 613 {
 614         int i;
 615         u64 total_unused = 0;
 616         struct string_table *matrix = NULL;
 617         int  ncols, nrows;
 618         int col;
 619         int unallocated_col;
 620         int spaceinfos_col;
 621         const int vhdr_skip = 3;        /* amount of vertical header space */
 622
 623         /* id, path, unallocated */
 624         ncols = 3;
 625         spaceinfos_col = 2;
 626         /* Properly count the real space infos */
 627         for (i = 0; i < sargs->total_spaces; i++) {
 628                 if (sargs->spaces[i].flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 629                         continue;
 630                 ncols++;
 631         }
 632
 633         /* 2 for header, empty line, devices, ===, total, used */
 634         nrows = vhdr_skip + device_info_count + 1 + 2;
 635
 636         matrix = table_create(ncols, nrows);
 637         if (!matrix) {
 638                 error("not enough memory");
 639                 return;
 640         }
 641
 642         /*
 643          * We have to skip the global block reserve everywhere as it's an
 644          * artificial blockgroup
 645          */
 646
 647         /* header */
 648         for (i = 0, col = spaceinfos_col; i < sargs->total_spaces; i++) {
 649                 u64 flags = sargs->spaces[i].flags;
 650
 651                 if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 652                         continue;
 653
 654                 table_printf(matrix, col, 0, "<%s",
 655                                 btrfs_group_type_str(flags));
 656                 table_printf(matrix, col, 1, "<%s",
 657                                 btrfs_group_profile_str(flags));
 658                 col++;
 659         }
 660         unallocated_col = col;
 661
 662         table_printf(matrix, 0, 1, "<Id");
 663         table_printf(matrix, 1, 1, "<Path");
 664         table_printf(matrix, unallocated_col, 1, "<Unallocated");
 665
 666         /* body */
 667         for (i = 0; i < device_info_count; i++) {
 668                 int k;
 669                 char *p;
 670
 671                 u64  total_allocated = 0, unused;
 672
 673                 p = strrchr(device_info_ptr[i].path, '/');
 674                 if (!p)
 675                         p = device_info_ptr[i].path;
 676                 else
 677                         p++;
 678
 679                 table_printf(matrix, 0, vhdr_skip + i, ">%llu",
 680                                 device_info_ptr[i].devid);
 681                 table_printf(matrix, 1, vhdr_skip + i, "<%s",
 682                                 device_info_ptr[i].path);
 683
 684                 for (col = spaceinfos_col, k = 0; k < sargs->total_spaces; k++) {
 685                         u64     flags = sargs->spaces[k].flags;
 686                         u64 devid = device_info_ptr[i].devid;
 687                         int     j;
 688                         u64 size = 0;
 689
 690                         if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 691                                 continue;
 692
 693                         for (j = 0 ; j < chunks_info_count ; j++) {
 694                                 if (chunks_info_ptr[j].type != flags )
 695                                                 continue;
 696                                 if (chunks_info_ptr[j].devid != devid)
 697                                                 continue;
 698
 699                                 size += calc_chunk_size(chunks_info_ptr+j);
 700                         }
 701
 702                         if (size)
 703                                 table_printf(matrix, col, vhdr_skip+ i,
 704                                         ">%s", pretty_size_mode(size, unit_mode));
 705                         else
 706                                 table_printf(matrix, col, vhdr_skip + i, ">-");
 707
 708                         total_allocated += size;
 709                         col++;
 710                 }
 711
 712                 unused = get_partition_size(device_info_ptr[i].path)
 713                                 - total_allocated;
 714
 715                 table_printf(matrix, unallocated_col, vhdr_skip + i,
 716                                ">%s", pretty_size_mode(unused, unit_mode));
 717                 total_unused += unused;
 718
 719         }
 720
 721         for (i = 0; i < spaceinfos_col; i++) {
 722                 table_printf(matrix, i, vhdr_skip - 1, "*-");
 723                 table_printf(matrix, i, vhdr_skip + device_info_count, "*-");
 724         }
 725
 726         for (i = 0, col = spaceinfos_col; i < sargs->total_spaces; i++) {
 727                 if (sargs->spaces[i].flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 728                         continue;
 729
 730                 table_printf(matrix, col, vhdr_skip - 1, "*-");
 731                 table_printf(matrix, col, vhdr_skip + device_info_count, "*-");
 732                 col++;
 733         }
 734         /* One for Unallocated */
 735         table_printf(matrix, col, vhdr_skip - 1, "*-");
 736         table_printf(matrix, col, vhdr_skip + device_info_count, "*-");
 737
 738         /* footer */
 739         table_printf(matrix, 1, vhdr_skip + device_info_count + 1, "<Total");
 740         for (i = 0, col = spaceinfos_col; i < sargs->total_spaces; i++) {
 741                 if (sargs->spaces[i].flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 742                         continue;
 743
 744                 table_printf(matrix, col++, vhdr_skip + device_info_count + 1,
 745                         ">%s",
 746                         pretty_size_mode(sargs->spaces[i].total_bytes, unit_mode));
 747         }
 748
 749         table_printf(matrix, unallocated_col, vhdr_skip + device_info_count + 1,
 750                         ">%s", pretty_size_mode(total_unused, unit_mode));
 751
 752         table_printf(matrix, 1, vhdr_skip + device_info_count + 2, "<Used");
 753         for (i = 0, col = spaceinfos_col; i < sargs->total_spaces; i++) {
 754                 if (sargs->spaces[i].flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 755                         continue;
 756
 757                 table_printf(matrix, col++, vhdr_skip + device_info_count + 2,
 758                         ">%s",
 759                         pretty_size_mode(sargs->spaces[i].used_bytes, unit_mode));
 760         }
 761
 762         table_dump(matrix);
 763         table_free(matrix);
 764 }
 765
 766 /*
 767  *  This function prints the unused space per every disk
 768  */
 769 static void print_unused(struct chunk_info *info_ptr,
 770                           int info_count,
 771                           struct device_info *device_info_ptr,
 772                           int device_info_count,
 773                           unsigned unit_mode)
 774 {
 775         int i;
 776         for (i = 0; i < device_info_count; i++) {
 777                 int     j;
 778                 u64     total = 0;
 779
 780                 for (j = 0; j < info_count; j++)
 781                         if (info_ptr[j].devid == device_info_ptr[i].devid)
 782                                 total += calc_chunk_size(info_ptr+j);
 783
 784                 printf("   %s\t%10s\n",
 785                         device_info_ptr[i].path,
 786                         pretty_size_mode(device_info_ptr[i].size - total,
 787                                 unit_mode));
 788         }
 789 }
 790
 791 /*
 792  *  This function prints the allocated chunk per every disk
 793  */
 794 static void print_chunk_device(u64 chunk_type,
 795                                 struct chunk_info *chunks_info_ptr,
 796                                 int chunks_info_count,
 797                                 struct device_info *device_info_ptr,
 798                                 int device_info_count,
 799                                 unsigned unit_mode)
 800 {
 801         int i;
 802
 803         for (i = 0; i < device_info_count; i++) {
 804                 int     j;
 805                 u64     total = 0;
 806
 807                 for (j = 0; j < chunks_info_count; j++) {
 808
 809                         if (chunks_info_ptr[j].type != chunk_type)
 810                                 continue;
 811                         if (chunks_info_ptr[j].devid != device_info_ptr[i].devid)
 812                                 continue;
 813
 814                         total += calc_chunk_size(&(chunks_info_ptr[j]));
 815                         //total += chunks_info_ptr[j].size;
 816                 }
 817
 818                 if (total > 0)
 819                         printf("   %s\t%10s\n",
 820                                 device_info_ptr[i].path,
 821                                 pretty_size_mode(total, unit_mode));
 822         }
 823 }
 824
 825 /*
 826  *  This function print the results of the command "btrfs fi usage"
 827  *  in linear format
 828  */
 829 static void _cmd_filesystem_usage_linear(unsigned unit_mode,
 830                                         struct btrfs_ioctl_space_args *sargs,
 831                                         struct chunk_info *info_ptr,
 832                                         int info_count,
 833                                         struct device_info *device_info_ptr,
 834                                         int device_info_count)
 835 {
 836         int i;
 837
 838         for (i = 0; i < sargs->total_spaces; i++) {
 839                 const char *description;
 840                 const char *r_mode;
 841                 u64 flags = sargs->spaces[i].flags;
 842
 843                 if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 844                         continue;
 845
 846                 description = btrfs_group_type_str(flags);
 847                 r_mode = btrfs_group_profile_str(flags);
 848
 849                 printf("%s,%s: Size:%s, ",
 850                         description,
 851                         r_mode,
 852                         pretty_size_mode(sargs->spaces[i].total_bytes,
 853                                 unit_mode));
 854                 printf("Used:%s\n",
 855                         pretty_size_mode(sargs->spaces[i].used_bytes, unit_mode));
 856                 print_chunk_device(flags, info_ptr, info_count,
 857                                 device_info_ptr, device_info_count, unit_mode);
 858                 printf("\n");
 859         }
 860
 861         printf("Unallocated:\n");
 862         print_unused(info_ptr, info_count, device_info_ptr, device_info_count,
 863                         unit_mode);
 864 }
 865
 866 static int print_filesystem_usage_by_chunk(int fd,
 867                 struct chunk_info *chunkinfo, int chunkcount,
 868                 struct device_info *devinfo, int devcount,
 869                 char *path, unsigned unit_mode, int tabular)
 870 {
 871         struct btrfs_ioctl_space_args *sargs;
 872         int ret = 0;
 873
 874         if (!chunkinfo)
 875                 return 0;
 876
 877         sargs = load_space_info(fd, path);
 878         if (!sargs) {
 879                 ret = 1;
 880                 goto out;
 881         }
 882
 883         if (tabular)
 884                 _cmd_filesystem_usage_tabular(unit_mode, sargs, chunkinfo,
 885                                 chunkcount, devinfo, devcount);
 886         else
 887                 _cmd_filesystem_usage_linear(unit_mode, sargs, chunkinfo,
 888                                 chunkcount, devinfo, devcount);
 889
 890         free(sargs);
 891 out:
 892         return ret;
 893 }
 894
 895 const char * const cmd_filesystem_usage_usage[] = {
 896         "btrfs filesystem usage [options] <path> [<path>..]",
 897         "Show detailed information about internal filesystem usage .",
 898         HELPINFO_UNITS_SHORT_LONG,
 899         "-T                 show data in tabular format",
 900         NULL
 901 };
 902
 903 int cmd_filesystem_usage(int argc, char **argv)
 904 {
 905         int ret = 0;
 906         unsigned unit_mode;
 907         int i;
 908         int more_than_one = 0;
 909         int tabular = 0;
 910
 911         unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
 912
 913         optind = 1;
 914         while (1) {
 915                 int c;
 916
 917                 c = getopt(argc, argv, "T");
 918                 if (c < 0)
 919                         break;
 920
 921                 switch (c) {
 922                 case 'T':
 923                         tabular = 1;
 924                         break;
 925                 default:
 926                         usage(cmd_filesystem_usage_usage);
 927                 }
 928         }
 929
 930         if (check_argc_min(argc - optind, 1))
 931                 usage(cmd_filesystem_usage_usage);
 932
 933         for (i = optind; i < argc; i++) {
 934                 int fd;
 935                 DIR *dirstream = NULL;
 936                 struct chunk_info *chunkinfo = NULL;
 937                 struct device_info *devinfo = NULL;
 938                 int chunkcount = 0;
 939                 int devcount = 0;
 940
 941                 fd = btrfs_open_dir(argv[i], &dirstream, 1);
 942                 if (fd < 0) {
 943                         ret = 1;
 944                         goto out;
 945                 }
 946                 if (more_than_one)
 947                         printf("\n");
 948
 949                 ret = load_chunk_and_device_info(fd, &chunkinfo, &chunkcount,
 950                                 &devinfo, &devcount);
 951                 if (ret)
 952                         goto cleanup;
 953
 954                 ret = print_filesystem_usage_overall(fd, chunkinfo, chunkcount,
 955                                 devinfo, devcount, argv[i], unit_mode);
 956                 if (ret)
 957                         goto cleanup;
 958                 printf("\n");
 959                 ret = print_filesystem_usage_by_chunk(fd, chunkinfo, chunkcount,
 960                                 devinfo, devcount, argv[i], unit_mode, tabular);
 961 cleanup:
 962                 close_file_or_dir(fd, dirstream);
 963                 free(chunkinfo);
 964                 free(devinfo);
 965
 966                 if (ret)
 967                         goto out;
 968                 more_than_one = 1;
 969         }
 970
 971 out:
 972         return !!ret;
 973 }
 974
 975 void print_device_chunks(int fd, struct device_info *devinfo,
 976                 struct chunk_info *chunks_info_ptr,
 977                 int chunks_info_count, unsigned unit_mode)
 978 {
 979         int i;
 980         u64 allocated = 0;
 981
 982         for (i = 0 ; i < chunks_info_count ; i++) {
 983                 const char *description;
 984                 const char *r_mode;
 985                 u64 flags;
 986                 u64 size;
 987
 988                 if (chunks_info_ptr[i].devid != devinfo->devid)
 989                         continue;
 990
 991                 flags = chunks_info_ptr[i].type;
 992
 993                 description = btrfs_group_type_str(flags);
 994                 r_mode = btrfs_group_profile_str(flags);
 995                 size = calc_chunk_size(chunks_info_ptr+i);
 996                 printf("   %s,%s:%*s%10s\n",
 997                         description,
 998                         r_mode,
 999                         (int)(20 - strlen(description) - strlen(r_mode)), "",
1000                         pretty_size_mode(size, unit_mode));
1001
1002                 allocated += size;
1003
1004         }
1005         printf("   Unallocated: %*s%10s\n",
1006                 (int)(20 - strlen("Unallocated")), "",
1007                 pretty_size_mode(devinfo->size - allocated, unit_mode));
1008 }
1009
1010 void print_device_sizes(int fd, struct device_info *devinfo, unsigned unit_mode)
1011 {
1012         printf("   Device size: %*s%10s\n",
1013                 (int)(20 - strlen("Device size")), "",
1014                 pretty_size_mode(devinfo->device_size, unit_mode));
1015 #if 0
1016         /*
1017          * The term has not seen an agreement and we don't want to change it
1018          * once it's in non-development branches or even released.
1019          */
1020         printf("   FS occupied: %*s%10s\n",
1021                 (int)(20 - strlen("FS occupied")), "",
1022                 pretty_size_mode(devinfo->size, unit_mode));
1023 #endif
1024 }