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   SZ_16M
 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 | UNITS_NEGATIVE));
 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                 if (ndevs >= fi_args.num_devices) {
 539                         error("unexpected number of devices: %d >= %llu", ndevs,
 540                                 (unsigned long long)fi_args.num_devices);
 541                         goto out;
 542                 }
 543                 memset(&dev_info, 0, sizeof(dev_info));
 544                 ret = get_device_info(fd, i, &dev_info);
 545
 546                 if (ret == -ENODEV)
 547                         continue;
 548                 if (ret) {
 549                         error("cannot get info about device devid=%d", i);
 550                         goto out;
 551                 }
 552
 553                 info[ndevs].devid = dev_info.devid;
 554                 if (!dev_info.path[0]) {
 555                         strcpy(info[ndevs].path, "missing");
 556                 } else {
 557                         strcpy(info[ndevs].path, (char *)dev_info.path);
 558                         info[ndevs].device_size =
 559                                 get_partition_size((char *)dev_info.path);
 560                 }
 561                 info[ndevs].size = dev_info.total_bytes;
 562                 ++ndevs;
 563         }
 564
 565         if (ndevs != fi_args.num_devices) {
 566                 error("unexpected number of devices: %d != %llu", ndevs,
 567                                 (unsigned long long)fi_args.num_devices);
 568                 goto out;
 569         }
 570
 571         qsort(info, fi_args.num_devices,
 572                 sizeof(struct device_info), cmp_device_info);
 573
 574         *device_info_count = fi_args.num_devices;
 575         *device_info_ptr = info;
 576
 577         return 0;
 578
 579 out:
 580         free(info);
 581         return ret;
 582 }
 583
 584 int load_chunk_and_device_info(int fd, struct chunk_info **chunkinfo,
 585                 int *chunkcount, struct device_info **devinfo, int *devcount)
 586 {
 587         int ret;
 588
 589         ret = load_chunk_info(fd, chunkinfo, chunkcount);
 590         if (ret == -EPERM) {
 591                 warning(
 592 "cannot read detailed chunk info, RAID5/6 numbers will be incorrect, run as root");
 593         } else if (ret) {
 594                 return ret;
 595         }
 596
 597         ret = load_device_info(fd, devinfo, devcount);
 598         if (ret == -EPERM) {
 599                 warning(
 600                 "cannot get filesystem info from ioctl(FS_INFO), run as root");
 601                 ret = 0;
 602         }
 603
 604         return ret;
 605 }
 606
 607 /*
 608  *  This function computes the size of a chunk in a disk
 609  */
 610 static u64 calc_chunk_size(struct chunk_info *ci)
 611 {
 612         if (ci->type & BTRFS_BLOCK_GROUP_RAID0)
 613                 return ci->size / ci->num_stripes;
 614         else if (ci->type & BTRFS_BLOCK_GROUP_RAID1)
 615                 return ci->size ;
 616         else if (ci->type & BTRFS_BLOCK_GROUP_DUP)
 617                 return ci->size ;
 618         else if (ci->type & BTRFS_BLOCK_GROUP_RAID5)
 619                 return ci->size / (ci->num_stripes -1);
 620         else if (ci->type & BTRFS_BLOCK_GROUP_RAID6)
 621                 return ci->size / (ci->num_stripes -2);
 622         else if (ci->type & BTRFS_BLOCK_GROUP_RAID10)
 623                 return ci->size / ci->num_stripes;
 624         return ci->size;
 625 }
 626
 627 /*
 628  *  This function print the results of the command "btrfs fi usage"
 629  *  in tabular format
 630  */
 631 static void _cmd_filesystem_usage_tabular(unsigned unit_mode,
 632                                         struct btrfs_ioctl_space_args *sargs,
 633                                         struct chunk_info *chunks_info_ptr,
 634                                         int chunks_info_count,
 635                                         struct device_info *device_info_ptr,
 636                                         int device_info_count)
 637 {
 638         int i;
 639         u64 total_unused = 0;
 640         struct string_table *matrix = NULL;
 641         int  ncols, nrows;
 642         int col;
 643         int unallocated_col;
 644         int spaceinfos_col;
 645         const int vhdr_skip = 3;        /* amount of vertical header space */
 646
 647         /* id, path, unallocated */
 648         ncols = 3;
 649         spaceinfos_col = 2;
 650         /* Properly count the real space infos */
 651         for (i = 0; i < sargs->total_spaces; i++) {
 652                 if (sargs->spaces[i].flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 653                         continue;
 654                 ncols++;
 655         }
 656
 657         /* 2 for header, empty line, devices, ===, total, used */
 658         nrows = vhdr_skip + device_info_count + 1 + 2;
 659
 660         matrix = table_create(ncols, nrows);
 661         if (!matrix) {
 662                 error("not enough memory");
 663                 return;
 664         }
 665
 666         /*
 667          * We have to skip the global block reserve everywhere as it's an
 668          * artificial blockgroup
 669          */
 670
 671         /* header */
 672         for (i = 0, col = spaceinfos_col; i < sargs->total_spaces; i++) {
 673                 u64 flags = sargs->spaces[i].flags;
 674
 675                 if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 676                         continue;
 677
 678                 table_printf(matrix, col, 0, "<%s",
 679                                 btrfs_group_type_str(flags));
 680                 table_printf(matrix, col, 1, "<%s",
 681                                 btrfs_group_profile_str(flags));
 682                 col++;
 683         }
 684         unallocated_col = col;
 685
 686         table_printf(matrix, 0, 1, "<Id");
 687         table_printf(matrix, 1, 1, "<Path");
 688         table_printf(matrix, unallocated_col, 1, "<Unallocated");
 689
 690         /* body */
 691         for (i = 0; i < device_info_count; i++) {
 692                 int k;
 693                 char *p;
 694
 695                 u64  total_allocated = 0, unused;
 696
 697                 p = strrchr(device_info_ptr[i].path, '/');
 698                 if (!p)
 699                         p = device_info_ptr[i].path;
 700                 else
 701                         p++;
 702
 703                 table_printf(matrix, 0, vhdr_skip + i, ">%llu",
 704                                 device_info_ptr[i].devid);
 705                 table_printf(matrix, 1, vhdr_skip + i, "<%s",
 706                                 device_info_ptr[i].path);
 707
 708                 for (col = spaceinfos_col, k = 0; k < sargs->total_spaces; k++) {
 709                         u64     flags = sargs->spaces[k].flags;
 710                         u64 devid = device_info_ptr[i].devid;
 711                         int     j;
 712                         u64 size = 0;
 713
 714                         if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 715                                 continue;
 716
 717                         for (j = 0 ; j < chunks_info_count ; j++) {
 718                                 if (chunks_info_ptr[j].type != flags )
 719                                                 continue;
 720                                 if (chunks_info_ptr[j].devid != devid)
 721                                                 continue;
 722
 723                                 size += calc_chunk_size(chunks_info_ptr+j);
 724                         }
 725
 726                         if (size)
 727                                 table_printf(matrix, col, vhdr_skip+ i,
 728                                         ">%s", pretty_size_mode(size, unit_mode));
 729                         else
 730                                 table_printf(matrix, col, vhdr_skip + i, ">-");
 731
 732                         total_allocated += size;
 733                         col++;
 734                 }
 735
 736                 unused = get_partition_size(device_info_ptr[i].path)
 737                                 - total_allocated;
 738
 739                 table_printf(matrix, unallocated_col, vhdr_skip + i, ">%s",
 740                         pretty_size_mode(unused, unit_mode | UNITS_NEGATIVE));
 741                 total_unused += unused;
 742
 743         }
 744
 745         for (i = 0; i < spaceinfos_col; i++) {
 746                 table_printf(matrix, i, vhdr_skip - 1, "*-");
 747                 table_printf(matrix, i, vhdr_skip + device_info_count, "*-");
 748         }
 749
 750         for (i = 0, col = spaceinfos_col; i < sargs->total_spaces; i++) {
 751                 if (sargs->spaces[i].flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 752                         continue;
 753
 754                 table_printf(matrix, col, vhdr_skip - 1, "*-");
 755                 table_printf(matrix, col, vhdr_skip + device_info_count, "*-");
 756                 col++;
 757         }
 758         /* One for Unallocated */
 759         table_printf(matrix, col, vhdr_skip - 1, "*-");
 760         table_printf(matrix, col, vhdr_skip + device_info_count, "*-");
 761
 762         /* footer */
 763         table_printf(matrix, 1, vhdr_skip + device_info_count + 1, "<Total");
 764         for (i = 0, col = spaceinfos_col; i < sargs->total_spaces; i++) {
 765                 if (sargs->spaces[i].flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 766                         continue;
 767
 768                 table_printf(matrix, col++, vhdr_skip + device_info_count + 1,
 769                         ">%s",
 770                         pretty_size_mode(sargs->spaces[i].total_bytes, unit_mode));
 771         }
 772
 773         table_printf(matrix, unallocated_col, vhdr_skip + device_info_count + 1,
 774                 ">%s",
 775                 pretty_size_mode(total_unused, unit_mode | UNITS_NEGATIVE));
 776
 777         table_printf(matrix, 1, vhdr_skip + device_info_count + 2, "<Used");
 778         for (i = 0, col = spaceinfos_col; i < sargs->total_spaces; i++) {
 779                 if (sargs->spaces[i].flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 780                         continue;
 781
 782                 table_printf(matrix, col++, vhdr_skip + device_info_count + 2,
 783                         ">%s",
 784                         pretty_size_mode(sargs->spaces[i].used_bytes, unit_mode));
 785         }
 786
 787         table_dump(matrix);
 788         table_free(matrix);
 789 }
 790
 791 /*
 792  *  This function prints the unused space per every disk
 793  */
 794 static void print_unused(struct chunk_info *info_ptr,
 795                           int info_count,
 796                           struct device_info *device_info_ptr,
 797                           int device_info_count,
 798                           unsigned unit_mode)
 799 {
 800         int i;
 801         for (i = 0; i < device_info_count; i++) {
 802                 int     j;
 803                 u64     total = 0;
 804
 805                 for (j = 0; j < info_count; j++)
 806                         if (info_ptr[j].devid == device_info_ptr[i].devid)
 807                                 total += calc_chunk_size(info_ptr+j);
 808
 809                 printf("   %s\t%10s\n",
 810                         device_info_ptr[i].path,
 811                         pretty_size_mode(device_info_ptr[i].size - total,
 812                                 unit_mode));
 813         }
 814 }
 815
 816 /*
 817  *  This function prints the allocated chunk per every disk
 818  */
 819 static void print_chunk_device(u64 chunk_type,
 820                                 struct chunk_info *chunks_info_ptr,
 821                                 int chunks_info_count,
 822                                 struct device_info *device_info_ptr,
 823                                 int device_info_count,
 824                                 unsigned unit_mode)
 825 {
 826         int i;
 827
 828         for (i = 0; i < device_info_count; i++) {
 829                 int     j;
 830                 u64     total = 0;
 831
 832                 for (j = 0; j < chunks_info_count; j++) {
 833
 834                         if (chunks_info_ptr[j].type != chunk_type)
 835                                 continue;
 836                         if (chunks_info_ptr[j].devid != device_info_ptr[i].devid)
 837                                 continue;
 838
 839                         total += calc_chunk_size(&(chunks_info_ptr[j]));
 840                         //total += chunks_info_ptr[j].size;
 841                 }
 842
 843                 if (total > 0)
 844                         printf("   %s\t%10s\n",
 845                                 device_info_ptr[i].path,
 846                                 pretty_size_mode(total, unit_mode));
 847         }
 848 }
 849
 850 /*
 851  *  This function print the results of the command "btrfs fi usage"
 852  *  in linear format
 853  */
 854 static void _cmd_filesystem_usage_linear(unsigned unit_mode,
 855                                         struct btrfs_ioctl_space_args *sargs,
 856                                         struct chunk_info *info_ptr,
 857                                         int info_count,
 858                                         struct device_info *device_info_ptr,
 859                                         int device_info_count)
 860 {
 861         int i;
 862
 863         for (i = 0; i < sargs->total_spaces; i++) {
 864                 const char *description;
 865                 const char *r_mode;
 866                 u64 flags = sargs->spaces[i].flags;
 867
 868                 if (flags & BTRFS_SPACE_INFO_GLOBAL_RSV)
 869                         continue;
 870
 871                 description = btrfs_group_type_str(flags);
 872                 r_mode = btrfs_group_profile_str(flags);
 873
 874                 printf("%s,%s: Size:%s, ",
 875                         description,
 876                         r_mode,
 877                         pretty_size_mode(sargs->spaces[i].total_bytes,
 878                                 unit_mode));
 879                 printf("Used:%s\n",
 880                         pretty_size_mode(sargs->spaces[i].used_bytes, unit_mode));
 881                 print_chunk_device(flags, info_ptr, info_count,
 882                                 device_info_ptr, device_info_count, unit_mode);
 883                 printf("\n");
 884         }
 885
 886         printf("Unallocated:\n");
 887         print_unused(info_ptr, info_count, device_info_ptr, device_info_count,
 888                         unit_mode | UNITS_NEGATIVE);
 889 }
 890
 891 static int print_filesystem_usage_by_chunk(int fd,
 892                 struct chunk_info *chunkinfo, int chunkcount,
 893                 struct device_info *devinfo, int devcount,
 894                 char *path, unsigned unit_mode, int tabular)
 895 {
 896         struct btrfs_ioctl_space_args *sargs;
 897         int ret = 0;
 898
 899         if (!chunkinfo)
 900                 return 0;
 901
 902         sargs = load_space_info(fd, path);
 903         if (!sargs) {
 904                 ret = 1;
 905                 goto out;
 906         }
 907
 908         if (tabular)
 909                 _cmd_filesystem_usage_tabular(unit_mode, sargs, chunkinfo,
 910                                 chunkcount, devinfo, devcount);
 911         else
 912                 _cmd_filesystem_usage_linear(unit_mode, sargs, chunkinfo,
 913                                 chunkcount, devinfo, devcount);
 914
 915         free(sargs);
 916 out:
 917         return ret;
 918 }
 919
 920 const char * const cmd_filesystem_usage_usage[] = {
 921         "btrfs filesystem usage [options] <path> [<path>..]",
 922         "Show detailed information about internal filesystem usage .",
 923         HELPINFO_UNITS_SHORT_LONG,
 924         "-T                 show data in tabular format",
 925         NULL
 926 };
 927
 928 int cmd_filesystem_usage(int argc, char **argv)
 929 {
 930         int ret = 0;
 931         unsigned unit_mode;
 932         int i;
 933         int more_than_one = 0;
 934         int tabular = 0;
 935
 936         unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
 937
 938         while (1) {
 939                 int c;
 940
 941                 c = getopt(argc, argv, "T");
 942                 if (c < 0)
 943                         break;
 944
 945                 switch (c) {
 946                 case 'T':
 947                         tabular = 1;
 948                         break;
 949                 default:
 950                         usage(cmd_filesystem_usage_usage);
 951                 }
 952         }
 953
 954         if (check_argc_min(argc - optind, 1))
 955                 usage(cmd_filesystem_usage_usage);
 956
 957         for (i = optind; i < argc; i++) {
 958                 int fd;
 959                 DIR *dirstream = NULL;
 960                 struct chunk_info *chunkinfo = NULL;
 961                 struct device_info *devinfo = NULL;
 962                 int chunkcount = 0;
 963                 int devcount = 0;
 964
 965                 fd = btrfs_open_dir(argv[i], &dirstream, 1);
 966                 if (fd < 0) {
 967                         ret = 1;
 968                         goto out;
 969                 }
 970                 if (more_than_one)
 971                         printf("\n");
 972
 973                 ret = load_chunk_and_device_info(fd, &chunkinfo, &chunkcount,
 974                                 &devinfo, &devcount);
 975                 if (ret)
 976                         goto cleanup;
 977
 978                 ret = print_filesystem_usage_overall(fd, chunkinfo, chunkcount,
 979                                 devinfo, devcount, argv[i], unit_mode);
 980                 if (ret)
 981                         goto cleanup;
 982                 printf("\n");
 983                 ret = print_filesystem_usage_by_chunk(fd, chunkinfo, chunkcount,
 984                                 devinfo, devcount, argv[i], unit_mode, tabular);
 985 cleanup:
 986                 close_file_or_dir(fd, dirstream);
 987                 free(chunkinfo);
 988                 free(devinfo);
 989
 990                 if (ret)
 991                         goto out;
 992                 more_than_one = 1;
 993         }
 994
 995 out:
 996         return !!ret;
 997 }
 998
 999 void print_device_chunks(int fd, struct device_info *devinfo,
1000                 struct chunk_info *chunks_info_ptr,
1001                 int chunks_info_count, unsigned unit_mode)
1002 {
1003         int i;
1004         u64 allocated = 0;
1005
1006         for (i = 0 ; i < chunks_info_count ; i++) {
1007                 const char *description;
1008                 const char *r_mode;
1009                 u64 flags;
1010                 u64 size;
1011
1012                 if (chunks_info_ptr[i].devid != devinfo->devid)
1013                         continue;
1014
1015                 flags = chunks_info_ptr[i].type;
1016
1017                 description = btrfs_group_type_str(flags);
1018                 r_mode = btrfs_group_profile_str(flags);
1019                 size = calc_chunk_size(chunks_info_ptr+i);
1020                 printf("   %s,%s:%*s%10s\n",
1021                         description,
1022                         r_mode,
1023                         (int)(20 - strlen(description) - strlen(r_mode)), "",
1024                         pretty_size_mode(size, unit_mode));
1025
1026                 allocated += size;
1027
1028         }
1029         printf("   Unallocated: %*s%10s\n",
1030                 (int)(20 - strlen("Unallocated")), "",
1031                 pretty_size_mode(devinfo->size - allocated,
1032                         unit_mode | UNITS_NEGATIVE));
1033 }
1034
1035 void print_device_sizes(int fd, struct device_info *devinfo, unsigned unit_mode)
1036 {
1037         printf("   Device size: %*s%10s\n",
1038                 (int)(20 - strlen("Device size")), "",
1039                 pretty_size_mode(devinfo->device_size, unit_mode));
1040         printf("   Device slack: %*s%10s\n",
1041                 (int)(20 - strlen("Device slack")), "",
1042                 pretty_size_mode(devinfo->device_size - devinfo->size,
1043                         unit_mode));
1044 }