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 tmp = sizeof(struct btrfs_chunk) * (*info_count + 1);
  67                         struct chunk_info *res = realloc(*info_ptr, tmp);
  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 += btrfs_search_header_len(sh);
 189
 190                         sk->min_objectid = btrfs_search_header_objectid(sh);
 191                         sk->min_type = btrfs_search_header_type(sh);
 192                         sk->min_offset = btrfs_search_header_offset(sh)+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 occupied 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         int mixed = 0;
 341
 342         sargs = load_space_info(fd, path);
 343         if (!sargs) {
 344                 ret = 1;
 345                 goto exit;
 346         }
 347
 348         r_total_size = 0;
 349         for (i = 0; i < devcount; i++) {
 350                 r_total_size += devinfo[i].size;
 351                 if (!devinfo[i].device_size)
 352                         r_total_missing += devinfo[i].size;
 353         }
 354
 355         if (r_total_size == 0) {
 356                 error("cannot get space info on '%s': %s",
 357                         path, strerror(errno));
 358
 359                 ret = 1;
 360                 goto exit;
 361         }
 362         get_raid56_used(fd, chunkinfo, chunkcount, &raid5_used, &raid6_used);
 363
 364         for (i = 0; i < sargs->total_spaces; i++) {
 365                 int ratio;
 366                 u64 flags = sargs->spaces[i].flags;
 367
 368                 /*
 369                  * The raid5/raid6 ratio depends by the stripes number
 370                  * used by every chunk. It is computed separately
 371                  */
 372                 if (flags & BTRFS_BLOCK_GROUP_RAID0)
 373                         ratio = 1;
 374                 else if (flags & BTRFS_BLOCK_GROUP_RAID1)
 375                         ratio = 2;
 376                 else if (flags & BTRFS_BLOCK_GROUP_RAID5)
 377                         ratio = 0;
 378                 else if (flags & BTRFS_BLOCK_GROUP_RAID6)
 379                         ratio = 0;
 380                 else if (flags & BTRFS_BLOCK_GROUP_DUP)
 381                         ratio = 2;
 382                 else if (flags & BTRFS_BLOCK_GROUP_RAID10)
 383                         ratio = 2;
 384                 else
 385                         ratio = 1;
 386
 387                 if (!ratio)
 388                         warning("RAID56 detected, not implemented");
 389
 390                 if (ratio > max_data_ratio)
 391                         max_data_ratio = ratio;
 392
 393                 if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV) {
 394                         l_global_reserve = sargs->spaces[i].total_bytes;
 395                         l_global_reserve_used = sargs->spaces[i].used_bytes;
 396                 }
 397                 if ((flags & (BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA))
 398                     == (BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA)) {
 399                         mixed = 1;
 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_system_chunks;
 418         r_total_used = r_data_used + r_system_used;
 419         if (!mixed) {
 420                 r_total_chunks += r_metadata_chunks;
 421                 r_total_used += r_metadata_used;
 422         }
 423         r_total_unused = r_total_size - r_total_chunks;
 424
 425         /* Raw / Logical = raid factor, >= 1 */
 426         data_ratio = (double)r_data_chunks / l_data_chunks;
 427         if (mixed)
 428                 metadata_ratio = data_ratio;
 429         else
 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         /*
 448          * For mixed-bg the metadata are left out in calculations thus global
 449          * reserve would be lost. Part of it could be permanently allocated,
 450          * we have to subtract the used bytes so we don't go under zero free.
 451          */
 452         if (mixed)
 453                 free_estimated -= l_global_reserve - l_global_reserve_used;
 454         free_min = free_estimated;
 455
 456         /* Chop unallocatable space */
 457         /* FIXME: must be applied per device */
 458         if (r_total_unused >= MIN_UNALOCATED_THRESH) {
 459                 free_estimated += r_total_unused / data_ratio;
 460                 /* Match the calculation of 'df', use the highest raid ratio */
 461                 free_min += r_total_unused / max_data_ratio;
 462         }
 463
 464         if (unit_mode != UNITS_HUMAN)
 465                 width = 18;
 466
 467         printf("Overall:\n");
 468
 469         printf("    Device size:\t\t%*s\n", width,
 470                 pretty_size_mode(r_total_size, unit_mode));
 471         printf("    Device allocated:\t\t%*s\n", width,
 472                 pretty_size_mode(r_total_chunks, unit_mode));
 473         printf("    Device unallocated:\t\t%*s\n", width,
 474                 pretty_size_mode(r_total_unused, unit_mode));
 475         printf("    Device missing:\t\t%*s\n", width,
 476                 pretty_size_mode(r_total_missing, unit_mode));
 477         printf("    Used:\t\t\t%*s\n", width,
 478                 pretty_size_mode(r_total_used, unit_mode));
 479         printf("    Free (estimated):\t\t%*s\t(",
 480                 width,
 481                 pretty_size_mode(free_estimated, unit_mode));
 482         printf("min: %s)\n", pretty_size_mode(free_min, unit_mode));
 483         printf("    Data ratio:\t\t\t%*.2f\n",
 484                 width, data_ratio);
 485         printf("    Metadata ratio:\t\t%*.2f\n",
 486                 width, metadata_ratio);
 487         printf("    Global reserve:\t\t%*s\t(used: %s)\n", width,
 488                 pretty_size_mode(l_global_reserve, unit_mode),
 489                 pretty_size_mode(l_global_reserve_used, unit_mode));
 490
 491 exit:
 492
 493         if (sargs)
 494                 free(sargs);
 495
 496         return ret;
 497 }
 498
 499 /*
 500  *  Helper to sort the device_info structure
 501  */
 502 static int cmp_device_info(const void *a, const void *b)
 503 {
 504         return strcmp(((struct device_info *)a)->path,
 505                         ((struct device_info *)b)->path);
 506 }
 507
 508 /*
 509  *  This function loads the device_info structure and put them in an array
 510  */
 511 static int load_device_info(int fd, struct device_info **device_info_ptr,
 512                            int *device_info_count)
 513 {
 514         int ret, i, ndevs;
 515         struct btrfs_ioctl_fs_info_args fi_args;
 516         struct btrfs_ioctl_dev_info_args dev_info;
 517         struct device_info *info;
 518
 519         *device_info_count = 0;
 520         *device_info_ptr = NULL;
 521
 522         ret = ioctl(fd, BTRFS_IOC_FS_INFO, &fi_args);
 523         if (ret < 0) {
 524                 if (errno == EPERM)
 525                         return -errno;
 526                 error("cannot get filesystem info: %s",
 527                                 strerror(errno));
 528                 return 1;
 529         }
 530
 531         info = calloc(fi_args.num_devices, sizeof(struct device_info));
 532         if (!info) {
 533                 error("not enough memory");
 534                 return 1;
 535         }
 536
 537         for (i = 0, ndevs = 0 ; i <= fi_args.max_id ; i++) {
 538                 BUG_ON(ndevs >= fi_args.num_devices);
 539                 memset(&dev_info, 0, sizeof(dev_info));
 540                 ret = get_device_info(fd, i, &dev_info);
 541
 542                 if (ret == -ENODEV)
 543                         continue;
 544                 if (ret) {
 545                         error("cannot get info about device devid=%d", i);
 546                         free(info);
 547                         return ret;
 548                 }
 549
 550                 info[ndevs].devid = dev_info.devid;
 551                 if (!dev_info.path[0]) {
 552                         strcpy(info[ndevs].path, "missing");
 553                 } else {
 554                         strcpy(info[ndevs].path, (char *)dev_info.path);
 555                         info[ndevs].device_size =
 556                                 get_partition_size((char *)dev_info.path);
 557                 }
 558                 info[ndevs].size = dev_info.total_bytes;
 559                 ++ndevs;
 560         }
 561
 562         BUG_ON(ndevs != fi_args.num_devices);
 563         qsort(info, fi_args.num_devices,
 564                 sizeof(struct device_info), cmp_device_info);
 565
 566         *device_info_count = fi_args.num_devices;
 567         *device_info_ptr = info;
 568
 569         return 0;
 570 }
 571
 572 int load_chunk_and_device_info(int fd, struct chunk_info **chunkinfo,
 573                 int *chunkcount, struct device_info **devinfo, int *devcount)
 574 {
 575         int ret;
 576
 577         ret = load_chunk_info(fd, chunkinfo, chunkcount);
 578         if (ret == -EPERM) {
 579                 warning(
 580 "cannot read detailed chunk info, RAID5/6 numbers will be incorrect, run as root");
 581         } else if (ret) {
 582                 return ret;
 583         }
 584
 585         ret = load_device_info(fd, devinfo, devcount);
 586         if (ret == -EPERM) {
 587                 warning(
 588                 "cannot get filesystem info from ioctl(FS_INFO), run as root");
 589                 ret = 0;
 590         }
 591
 592         return ret;
 593 }
 594
 595 /*
 596  *  This function computes the size of a chunk in a disk
 597  */
 598 static u64 calc_chunk_size(struct chunk_info *ci)
 599 {
 600         if (ci->type & BTRFS_BLOCK_GROUP_RAID0)
 601                 return ci->size / ci->num_stripes;
 602         else if (ci->type & BTRFS_BLOCK_GROUP_RAID1)
 603                 return ci->size ;
 604         else if (ci->type & BTRFS_BLOCK_GROUP_DUP)
 605                 return ci->size ;
 606         else if (ci->type & BTRFS_BLOCK_GROUP_RAID5)
 607                 return ci->size / (ci->num_stripes -1);
 608         else if (ci->type & BTRFS_BLOCK_GROUP_RAID6)
 609                 return ci->size / (ci->num_stripes -2);
 610         else if (ci->type & BTRFS_BLOCK_GROUP_RAID10)
 611                 return ci->size / ci->num_stripes;
 612         return ci->size;
 613 }
 614
 615 /*
 616  *  This function print the results of the command "btrfs fi usage"
 617  *  in tabular format
 618  */
 619 static void _cmd_filesystem_usage_tabular(unsigned unit_mode,
 620                                         struct btrfs_ioctl_space_args *sargs,
 621                                         struct chunk_info *chunks_info_ptr,
 622                                         int chunks_info_count,
 623                                         struct device_info *device_info_ptr,
 624                                         int device_info_count)
 625 {
 626         int i;
 627         u64 total_unused = 0;
 628         struct string_table *matrix = NULL;
 629         int  ncols, nrows;
 630         int col;
 631         int unallocated_col;
 632         int spaceinfos_col;
 633         const int vhdr_skip = 3;        /* amount of vertical header space */
 634
 635         /* id, path, unallocated */
 636         ncols = 3;
 637         spaceinfos_col = 2;
 638         /* Properly count the real space infos */
 639         for (i = 0; i < sargs->total_spaces; i++) {
 640                 if (sargs->spaces[i].flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 641                         continue;
 642                 ncols++;
 643         }
 644
 645         /* 2 for header, empty line, devices, ===, total, used */
 646         nrows = vhdr_skip + device_info_count + 1 + 2;
 647
 648         matrix = table_create(ncols, nrows);
 649         if (!matrix) {
 650                 error("not enough memory");
 651                 return;
 652         }
 653
 654         /*
 655          * We have to skip the global block reserve everywhere as it's an
 656          * artificial blockgroup
 657          */
 658
 659         /* header */
 660         for (i = 0, col = spaceinfos_col; i < sargs->total_spaces; i++) {
 661                 u64 flags = sargs->spaces[i].flags;
 662
 663                 if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 664                         continue;
 665
 666                 table_printf(matrix, col, 0, "<%s",
 667                                 btrfs_group_type_str(flags));
 668                 table_printf(matrix, col, 1, "<%s",
 669                                 btrfs_group_profile_str(flags));
 670                 col++;
 671         }
 672         unallocated_col = col;
 673
 674         table_printf(matrix, 0, 1, "<Id");
 675         table_printf(matrix, 1, 1, "<Path");
 676         table_printf(matrix, unallocated_col, 1, "<Unallocated");
 677
 678         /* body */
 679         for (i = 0; i < device_info_count; i++) {
 680                 int k;
 681                 char *p;
 682
 683                 u64  total_allocated = 0, unused;
 684
 685                 p = strrchr(device_info_ptr[i].path, '/');
 686                 if (!p)
 687                         p = device_info_ptr[i].path;
 688                 else
 689                         p++;
 690
 691                 table_printf(matrix, 0, vhdr_skip + i, ">%llu",
 692                                 device_info_ptr[i].devid);
 693                 table_printf(matrix, 1, vhdr_skip + i, "<%s",
 694                                 device_info_ptr[i].path);
 695
 696                 for (col = spaceinfos_col, k = 0; k < sargs->total_spaces; k++) {
 697                         u64     flags = sargs->spaces[k].flags;
 698                         u64 devid = device_info_ptr[i].devid;
 699                         int     j;
 700                         u64 size = 0;
 701
 702                         if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 703                                 continue;
 704
 705                         for (j = 0 ; j < chunks_info_count ; j++) {
 706                                 if (chunks_info_ptr[j].type != flags )
 707                                                 continue;
 708                                 if (chunks_info_ptr[j].devid != devid)
 709                                                 continue;
 710
 711                                 size += calc_chunk_size(chunks_info_ptr+j);
 712                         }
 713
 714                         if (size)
 715                                 table_printf(matrix, col, vhdr_skip+ i,
 716                                         ">%s", pretty_size_mode(size, unit_mode));
 717                         else
 718                                 table_printf(matrix, col, vhdr_skip + i, ">-");
 719
 720                         total_allocated += size;
 721                         col++;
 722                 }
 723
 724                 unused = get_partition_size(device_info_ptr[i].path)
 725                                 - total_allocated;
 726
 727                 table_printf(matrix, unallocated_col, vhdr_skip + i,
 728                                ">%s", pretty_size_mode(unused, unit_mode));
 729                 total_unused += unused;
 730
 731         }
 732
 733         for (i = 0; i < spaceinfos_col; i++) {
 734                 table_printf(matrix, i, vhdr_skip - 1, "*-");
 735                 table_printf(matrix, i, vhdr_skip + device_info_count, "*-");
 736         }
 737
 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 - 1, "*-");
 743                 table_printf(matrix, col, vhdr_skip + device_info_count, "*-");
 744                 col++;
 745         }
 746         /* One for Unallocated */
 747         table_printf(matrix, col, vhdr_skip - 1, "*-");
 748         table_printf(matrix, col, vhdr_skip + device_info_count, "*-");
 749
 750         /* footer */
 751         table_printf(matrix, 1, vhdr_skip + device_info_count + 1, "<Total");
 752         for (i = 0, col = spaceinfos_col; i < sargs->total_spaces; i++) {
 753                 if (sargs->spaces[i].flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 754                         continue;
 755
 756                 table_printf(matrix, col++, vhdr_skip + device_info_count + 1,
 757                         ">%s",
 758                         pretty_size_mode(sargs->spaces[i].total_bytes, unit_mode));
 759         }
 760
 761         table_printf(matrix, unallocated_col, vhdr_skip + device_info_count + 1,
 762                         ">%s", pretty_size_mode(total_unused, unit_mode));
 763
 764         table_printf(matrix, 1, vhdr_skip + device_info_count + 2, "<Used");
 765         for (i = 0, col = spaceinfos_col; i < sargs->total_spaces; i++) {
 766                 if (sargs->spaces[i].flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 767                         continue;
 768
 769                 table_printf(matrix, col++, vhdr_skip + device_info_count + 2,
 770                         ">%s",
 771                         pretty_size_mode(sargs->spaces[i].used_bytes, unit_mode));
 772         }
 773
 774         table_dump(matrix);
 775         table_free(matrix);
 776 }
 777
 778 /*
 779  *  This function prints the unused space per every disk
 780  */
 781 static void print_unused(struct chunk_info *info_ptr,
 782                           int info_count,
 783                           struct device_info *device_info_ptr,
 784                           int device_info_count,
 785                           unsigned unit_mode)
 786 {
 787         int i;
 788         for (i = 0; i < device_info_count; i++) {
 789                 int     j;
 790                 u64     total = 0;
 791
 792                 for (j = 0; j < info_count; j++)
 793                         if (info_ptr[j].devid == device_info_ptr[i].devid)
 794                                 total += calc_chunk_size(info_ptr+j);
 795
 796                 printf("   %s\t%10s\n",
 797                         device_info_ptr[i].path,
 798                         pretty_size_mode(device_info_ptr[i].size - total,
 799                                 unit_mode));
 800         }
 801 }
 802
 803 /*
 804  *  This function prints the allocated chunk per every disk
 805  */
 806 static void print_chunk_device(u64 chunk_type,
 807                                 struct chunk_info *chunks_info_ptr,
 808                                 int chunks_info_count,
 809                                 struct device_info *device_info_ptr,
 810                                 int device_info_count,
 811                                 unsigned unit_mode)
 812 {
 813         int i;
 814
 815         for (i = 0; i < device_info_count; i++) {
 816                 int     j;
 817                 u64     total = 0;
 818
 819                 for (j = 0; j < chunks_info_count; j++) {
 820
 821                         if (chunks_info_ptr[j].type != chunk_type)
 822                                 continue;
 823                         if (chunks_info_ptr[j].devid != device_info_ptr[i].devid)
 824                                 continue;
 825
 826                         total += calc_chunk_size(&(chunks_info_ptr[j]));
 827                         //total += chunks_info_ptr[j].size;
 828                 }
 829
 830                 if (total > 0)
 831                         printf("   %s\t%10s\n",
 832                                 device_info_ptr[i].path,
 833                                 pretty_size_mode(total, unit_mode));
 834         }
 835 }
 836
 837 /*
 838  *  This function print the results of the command "btrfs fi usage"
 839  *  in linear format
 840  */
 841 static void _cmd_filesystem_usage_linear(unsigned unit_mode,
 842                                         struct btrfs_ioctl_space_args *sargs,
 843                                         struct chunk_info *info_ptr,
 844                                         int info_count,
 845                                         struct device_info *device_info_ptr,
 846                                         int device_info_count)
 847 {
 848         int i;
 849
 850         for (i = 0; i < sargs->total_spaces; i++) {
 851                 const char *description;
 852                 const char *r_mode;
 853                 u64 flags = sargs->spaces[i].flags;
 854
 855                 if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 856                         continue;
 857
 858                 description = btrfs_group_type_str(flags);
 859                 r_mode = btrfs_group_profile_str(flags);
 860
 861                 printf("%s,%s: Size:%s, ",
 862                         description,
 863                         r_mode,
 864                         pretty_size_mode(sargs->spaces[i].total_bytes,
 865                                 unit_mode));
 866                 printf("Used:%s\n",
 867                         pretty_size_mode(sargs->spaces[i].used_bytes, unit_mode));
 868                 print_chunk_device(flags, info_ptr, info_count,
 869                                 device_info_ptr, device_info_count, unit_mode);
 870                 printf("\n");
 871         }
 872
 873         printf("Unallocated:\n");
 874         print_unused(info_ptr, info_count, device_info_ptr, device_info_count,
 875                         unit_mode);
 876 }
 877
 878 static int print_filesystem_usage_by_chunk(int fd,
 879                 struct chunk_info *chunkinfo, int chunkcount,
 880                 struct device_info *devinfo, int devcount,
 881                 char *path, unsigned unit_mode, int tabular)
 882 {
 883         struct btrfs_ioctl_space_args *sargs;
 884         int ret = 0;
 885
 886         if (!chunkinfo)
 887                 return 0;
 888
 889         sargs = load_space_info(fd, path);
 890         if (!sargs) {
 891                 ret = 1;
 892                 goto out;
 893         }
 894
 895         if (tabular)
 896                 _cmd_filesystem_usage_tabular(unit_mode, sargs, chunkinfo,
 897                                 chunkcount, devinfo, devcount);
 898         else
 899                 _cmd_filesystem_usage_linear(unit_mode, sargs, chunkinfo,
 900                                 chunkcount, devinfo, devcount);
 901
 902         free(sargs);
 903 out:
 904         return ret;
 905 }
 906
 907 const char * const cmd_filesystem_usage_usage[] = {
 908         "btrfs filesystem usage [options] <path> [<path>..]",
 909         "Show detailed information about internal filesystem usage .",
 910         HELPINFO_UNITS_SHORT_LONG,
 911         "-T                 show data in tabular format",
 912         NULL
 913 };
 914
 915 int cmd_filesystem_usage(int argc, char **argv)
 916 {
 917         int ret = 0;
 918         unsigned unit_mode;
 919         int i;
 920         int more_than_one = 0;
 921         int tabular = 0;
 922
 923         unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
 924
 925         optind = 1;
 926         while (1) {
 927                 int c;
 928
 929                 c = getopt(argc, argv, "T");
 930                 if (c < 0)
 931                         break;
 932
 933                 switch (c) {
 934                 case 'T':
 935                         tabular = 1;
 936                         break;
 937                 default:
 938                         usage(cmd_filesystem_usage_usage);
 939                 }
 940         }
 941
 942         if (check_argc_min(argc - optind, 1))
 943                 usage(cmd_filesystem_usage_usage);
 944
 945         for (i = optind; i < argc; i++) {
 946                 int fd;
 947                 DIR *dirstream = NULL;
 948                 struct chunk_info *chunkinfo = NULL;
 949                 struct device_info *devinfo = NULL;
 950                 int chunkcount = 0;
 951                 int devcount = 0;
 952
 953                 fd = btrfs_open_dir(argv[i], &dirstream, 1);
 954                 if (fd < 0) {
 955                         ret = 1;
 956                         goto out;
 957                 }
 958                 if (more_than_one)
 959                         printf("\n");
 960
 961                 ret = load_chunk_and_device_info(fd, &chunkinfo, &chunkcount,
 962                                 &devinfo, &devcount);
 963                 if (ret)
 964                         goto cleanup;
 965
 966                 ret = print_filesystem_usage_overall(fd, chunkinfo, chunkcount,
 967                                 devinfo, devcount, argv[i], unit_mode);
 968                 if (ret)
 969                         goto cleanup;
 970                 printf("\n");
 971                 ret = print_filesystem_usage_by_chunk(fd, chunkinfo, chunkcount,
 972                                 devinfo, devcount, argv[i], unit_mode, tabular);
 973 cleanup:
 974                 close_file_or_dir(fd, dirstream);
 975                 free(chunkinfo);
 976                 free(devinfo);
 977
 978                 if (ret)
 979                         goto out;
 980                 more_than_one = 1;
 981         }
 982
 983 out:
 984         return !!ret;
 985 }
 986
 987 void print_device_chunks(int fd, struct device_info *devinfo,
 988                 struct chunk_info *chunks_info_ptr,
 989                 int chunks_info_count, unsigned unit_mode)
 990 {
 991         int i;
 992         u64 allocated = 0;
 993
 994         for (i = 0 ; i < chunks_info_count ; i++) {
 995                 const char *description;
 996                 const char *r_mode;
 997                 u64 flags;
 998                 u64 size;
 999
1000                 if (chunks_info_ptr[i].devid != devinfo->devid)
1001                         continue;
1002
1003                 flags = chunks_info_ptr[i].type;
1004
1005                 description = btrfs_group_type_str(flags);
1006                 r_mode = btrfs_group_profile_str(flags);
1007                 size = calc_chunk_size(chunks_info_ptr+i);
1008                 printf("   %s,%s:%*s%10s\n",
1009                         description,
1010                         r_mode,
1011                         (int)(20 - strlen(description) - strlen(r_mode)), "",
1012                         pretty_size_mode(size, unit_mode));
1013
1014                 allocated += size;
1015
1016         }
1017         printf("   Unallocated: %*s%10s\n",
1018                 (int)(20 - strlen("Unallocated")), "",
1019                 pretty_size_mode(devinfo->size - allocated, unit_mode));
1020 }
1021
1022 void print_device_sizes(int fd, struct device_info *devinfo, unsigned unit_mode)
1023 {
1024         printf("   Device size: %*s%10s\n",
1025                 (int)(20 - strlen("Device size")), "",
1026                 pretty_size_mode(devinfo->device_size, unit_mode));
1027 #if 0
1028         /*
1029          * The term has not seen an agreement and we don't want to change it
1030          * once it's in non-development branches or even released.
1031          */
1032         printf("   FS occupied: %*s%10s\n",
1033                 (int)(20 - strlen("FS occupied")), "",
1034                 pretty_size_mode(devinfo->size, unit_mode));
1035 #endif
1036 }