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