print-tree.c

   1 /*
   2  * Copyright (C) 2007 Oracle.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public
   6  * License v2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public
  14  * License along with this program; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 021110-1307, USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <uuid/uuid.h>
  22 #include "kerncompat.h"
  23 #include "radix-tree.h"
  24 #include "ctree.h"
  25 #include "disk-io.h"
  26 #include "print-tree.h"
  27
  28 static int print_dir_item(struct extent_buffer *eb, struct btrfs_item *item,
  29                           struct btrfs_dir_item *di)
  30 {
  31         u32 total;
  32         u32 cur = 0;
  33         u32 len;
  34         u32 name_len;
  35         u32 data_len;
  36         char namebuf[BTRFS_NAME_LEN];
  37         struct btrfs_disk_key location;
  38
  39         total = btrfs_item_size(eb, item);
  40         while(cur < total) {
  41                 btrfs_dir_item_key(eb, di, &location);
  42                 printf("\t\tlocation ");
  43                 btrfs_print_key(&location);
  44                 printf(" type %u\n", btrfs_dir_type(eb, di));
  45                 name_len = btrfs_dir_name_len(eb, di);
  46                 data_len = btrfs_dir_data_len(eb, di);
  47                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
  48                 read_extent_buffer(eb, namebuf, (unsigned long)(di + 1), len);
  49                 printf("\t\tnamelen %u datalen %u name: %.*s\n",
  50                        name_len, data_len, len, namebuf);
  51                 len = sizeof(*di) + name_len + data_len;
  52                 di = (struct btrfs_dir_item *)((char *)di + len);
  53                 cur += len;
  54         }
  55         return 0;
  56 }
  57
  58 static int print_inode_ref_item(struct extent_buffer *eb, struct btrfs_item *item,
  59                                 struct btrfs_inode_ref *ref)
  60 {
  61         u32 total;
  62         u32 cur = 0;
  63         u32 len;
  64         u32 name_len;
  65         u64 index;
  66         char namebuf[BTRFS_NAME_LEN];
  67         total = btrfs_item_size(eb, item);
  68         while(cur < total) {
  69                 name_len = btrfs_inode_ref_name_len(eb, ref);
  70                 index = btrfs_inode_ref_index(eb, ref);
  71                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
  72                 read_extent_buffer(eb, namebuf, (unsigned long)(ref + 1), len);
  73                 printf("\t\tinode ref index %llu namelen %u name: %.*s\n",
  74                        (unsigned long long)index, name_len, len, namebuf);
  75                 len = sizeof(*ref) + name_len;
  76                 ref = (struct btrfs_inode_ref *)((char *)ref + len);
  77                 cur += len;
  78         }
  79         return 0;
  80 }
  81
  82 static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
  83 {
  84         int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
  85         int i;
  86         printf("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
  87                (unsigned long long)btrfs_chunk_length(eb, chunk),
  88                (unsigned long long)btrfs_chunk_owner(eb, chunk),
  89                (unsigned long long)btrfs_chunk_type(eb, chunk),
  90                num_stripes);
  91         for (i = 0 ; i < num_stripes ; i++) {
  92                 printf("\t\t\tstripe %d devid %llu offset %llu\n", i,
  93                       (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
  94                       (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
  95         }
  96 }
  97
  98 static void print_dev_item(struct extent_buffer *eb,
  99                            struct btrfs_dev_item *dev_item)
 100 {
 101         printf("\t\tdev item devid %llu "
 102                "total_bytes %llu bytes used %Lu\n",
 103                (unsigned long long)btrfs_device_id(eb, dev_item),
 104                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
 105                (unsigned long long)btrfs_device_bytes_used(eb, dev_item));
 106 }
 107
 108 static void print_uuids(struct extent_buffer *eb)
 109 {
 110         char fs_uuid[37];
 111         char chunk_uuid[37];
 112         u8 disk_uuid[BTRFS_UUID_SIZE];
 113
 114         read_extent_buffer(eb, disk_uuid, (unsigned long)btrfs_header_fsid(eb),
 115                            BTRFS_FSID_SIZE);
 116
 117         fs_uuid[36] = '\0';
 118         uuid_unparse(disk_uuid, fs_uuid);
 119
 120         read_extent_buffer(eb, disk_uuid,
 121                            (unsigned long)btrfs_header_chunk_tree_uuid(eb),
 122                            BTRFS_UUID_SIZE);
 123
 124         chunk_uuid[36] = '\0';
 125         uuid_unparse(disk_uuid, chunk_uuid);
 126         printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
 127 }
 128
 129 static void print_file_extent_item(struct extent_buffer *eb,
 130                                    struct btrfs_item *item,
 131                                    struct btrfs_file_extent_item *fi)
 132 {
 133         int extent_type = btrfs_file_extent_type(eb, fi);
 134
 135         if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 136                 printf("\t\tinline extent data size %u "
 137                        "ram %u compress %d\n",
 138                   btrfs_file_extent_inline_item_len(eb, item),
 139                   btrfs_file_extent_inline_len(eb, fi),
 140                   btrfs_file_extent_compression(eb, fi));
 141                 return;
 142         }
 143         if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
 144                 printf("\t\tprealloc data disk byte %llu nr %llu\n",
 145                   (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 146                   (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 147                 printf("\t\tprealloc data offset %llu nr %llu\n",
 148                   (unsigned long long)btrfs_file_extent_offset(eb, fi),
 149                   (unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
 150                 return;
 151         }
 152         printf("\t\textent data disk byte %llu nr %llu\n",
 153                 (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 154                 (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 155         printf("\t\textent data offset %llu nr %llu ram %llu\n",
 156                 (unsigned long long)btrfs_file_extent_offset(eb, fi),
 157                 (unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
 158                 (unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
 159         printf("\t\textent compression %d\n",
 160                btrfs_file_extent_compression(eb, fi));
 161 }
 162
 163 static void print_extent_item(struct extent_buffer *eb, int slot)
 164 {
 165         struct btrfs_extent_item *ei;
 166         struct btrfs_extent_inline_ref *iref;
 167         struct btrfs_extent_data_ref *dref;
 168         struct btrfs_shared_data_ref *sref;
 169         struct btrfs_disk_key key;
 170         unsigned long end;
 171         unsigned long ptr;
 172         int type;
 173         u32 item_size = btrfs_item_size_nr(eb, slot);
 174         u64 flags;
 175         u64 offset;
 176
 177         if (item_size < sizeof(*ei)) {
 178 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 179                 struct btrfs_extent_item_v0 *ei0;
 180                 BUG_ON(item_size != sizeof(*ei0));
 181                 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
 182                 printf("\t\textent refs %u\n",
 183                        btrfs_extent_refs_v0(eb, ei0));
 184                 return;
 185 #else
 186                 BUG();
 187 #endif
 188         }
 189
 190         ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
 191         flags = btrfs_extent_flags(eb, ei);
 192
 193         printf("\t\textent refs %llu gen %llu flags %llu\n",
 194                (unsigned long long)btrfs_extent_refs(eb, ei),
 195                (unsigned long long)btrfs_extent_generation(eb, ei),
 196                (unsigned long long)flags);
 197
 198         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
 199                 struct btrfs_tree_block_info *info;
 200                 info = (struct btrfs_tree_block_info *)(ei + 1);
 201                 btrfs_tree_block_key(eb, info, &key);
 202                 printf("\t\ttree block key (%llu %x %llu) level %d\n",
 203                        (unsigned long long)btrfs_disk_key_objectid(&key),
 204                        key.type,
 205                        (unsigned long long)btrfs_disk_key_offset(&key),
 206                        btrfs_tree_block_level(eb, info));
 207                 iref = (struct btrfs_extent_inline_ref *)(info + 1);
 208         } else {
 209                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 210         }
 211
 212         ptr = (unsigned long)iref;
 213         end = (unsigned long)ei + item_size;
 214         while (ptr < end) {
 215                 iref = (struct btrfs_extent_inline_ref *)ptr;
 216                 type = btrfs_extent_inline_ref_type(eb, iref);
 217                 offset = btrfs_extent_inline_ref_offset(eb, iref);
 218                 switch (type) {
 219                 case BTRFS_TREE_BLOCK_REF_KEY:
 220                         printf("\t\ttree block backref root %llu\n",
 221                                (unsigned long long)offset);
 222                         break;
 223                 case BTRFS_SHARED_BLOCK_REF_KEY:
 224                         printf("\t\tshared block backref parent %llu\n",
 225                                (unsigned long long)offset);
 226                         break;
 227                 case BTRFS_EXTENT_DATA_REF_KEY:
 228                         dref = (struct btrfs_extent_data_ref *)(&iref->offset);
 229                         printf("\t\textent data backref root %llu "
 230                                "objectid %llu offset %llu count %u\n",
 231                                (unsigned long long)btrfs_extent_data_ref_root(eb, dref),
 232                                (unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
 233                                (unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
 234                                btrfs_extent_data_ref_count(eb, dref));
 235                         break;
 236                 case BTRFS_SHARED_DATA_REF_KEY:
 237                         sref = (struct btrfs_shared_data_ref *)(iref + 1);
 238                         printf("\t\tshared data backref parent %llu count %u\n",
 239                                (unsigned long long)offset,
 240                                btrfs_shared_data_ref_count(eb, sref));
 241                         break;
 242                 default:
 243                         return;
 244                 }
 245                 ptr += btrfs_extent_inline_ref_size(type);
 246         }
 247         WARN_ON(ptr > end);
 248 }
 249
 250 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 251 static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
 252 {
 253         struct btrfs_extent_ref_v0 *ref0;
 254
 255         ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
 256         printf("\t\textent back ref root %llu gen %llu "
 257                 "owner %llu num_refs %lu\n",
 258                 (unsigned long long)btrfs_ref_root_v0(eb, ref0),
 259                 (unsigned long long)btrfs_ref_generation_v0(eb, ref0),
 260                 (unsigned long long)btrfs_ref_objectid_v0(eb, ref0),
 261                 (unsigned long)btrfs_ref_count_v0(eb, ref0));
 262 }
 263 #endif
 264
 265 static void print_root_ref(struct extent_buffer *leaf, int slot, char *tag)
 266 {
 267         struct btrfs_root_ref *ref;
 268         char namebuf[BTRFS_NAME_LEN];
 269         int namelen;
 270
 271         ref = btrfs_item_ptr(leaf, slot, struct btrfs_root_ref);
 272         namelen = btrfs_root_ref_name_len(leaf, ref);
 273         read_extent_buffer(leaf, namebuf, (unsigned long)(ref + 1), namelen);
 274         printf("\t\troot %s key dirid %llu sequence %llu name %.*s\n", tag,
 275                (unsigned long long)btrfs_root_ref_dirid(leaf, ref),
 276                (unsigned long long)btrfs_root_ref_sequence(leaf, ref),
 277                namelen, namebuf);
 278 }
 279
 280 static void print_free_space_header(struct extent_buffer *leaf, int slot)
 281 {
 282         struct btrfs_free_space_header *header;
 283         struct btrfs_disk_key location;
 284
 285         header = btrfs_item_ptr(leaf, slot, struct btrfs_free_space_header);
 286         btrfs_free_space_key(leaf, header, &location);
 287         printf("\t\tlocation ");
 288         btrfs_print_key(&location);
 289         printf("\n");
 290         printf("\t\tcache generation %llu entries %llu bitmaps %llu\n",
 291                (unsigned long long)btrfs_free_space_generation(leaf, header),
 292                (unsigned long long)btrfs_free_space_entries(leaf, header),
 293                (unsigned long long)btrfs_free_space_bitmaps(leaf, header));
 294 }
 295
 296 static void print_key_type(u64 objectid, u8 type)
 297 {
 298         if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID) {
 299                 printf("UNTYPED");
 300                 return;
 301         }
 302
 303         switch (type) {
 304         case BTRFS_INODE_ITEM_KEY:
 305                 printf("INODE_ITEM");
 306                 break;
 307         case BTRFS_INODE_REF_KEY:
 308                 printf("INODE_REF");
 309                 break;
 310         case BTRFS_DIR_ITEM_KEY:
 311                 printf("DIR_ITEM");
 312                 break;
 313         case BTRFS_DIR_INDEX_KEY:
 314                 printf("DIR_INDEX");
 315                 break;
 316         case BTRFS_DIR_LOG_ITEM_KEY:
 317                 printf("DIR_LOG_ITEM");
 318                 break;
 319         case BTRFS_DIR_LOG_INDEX_KEY:
 320                 printf("DIR_LOG_INDEX");
 321                 break;
 322         case BTRFS_XATTR_ITEM_KEY:
 323                 printf("XATTR_ITEM");
 324                 break;
 325         case BTRFS_ORPHAN_ITEM_KEY:
 326                 printf("ORPHAN_ITEM");
 327                 break;
 328         case BTRFS_ROOT_ITEM_KEY:
 329                 printf("ROOT_ITEM");
 330                 break;
 331         case BTRFS_ROOT_REF_KEY:
 332                 printf("ROOT_REF");
 333                 break;
 334         case BTRFS_ROOT_BACKREF_KEY:
 335                 printf("ROOT_BACKREF");
 336                 break;
 337         case BTRFS_EXTENT_ITEM_KEY:
 338                 printf("EXTENT_ITEM");
 339                 break;
 340         case BTRFS_TREE_BLOCK_REF_KEY:
 341                 printf("TREE_BLOCK_REF");
 342                 break;
 343         case BTRFS_SHARED_BLOCK_REF_KEY:
 344                 printf("SHARED_BLOCK_REF");
 345                 break;
 346         case BTRFS_EXTENT_DATA_REF_KEY:
 347                 printf("EXTENT_DATA_REF");
 348                 break;
 349         case BTRFS_SHARED_DATA_REF_KEY:
 350                 printf("SHARED_DATA_REF");
 351                 break;
 352         case BTRFS_EXTENT_REF_V0_KEY:
 353                 printf("EXTENT_REF_V0");
 354                 break;
 355         case BTRFS_CSUM_ITEM_KEY:
 356                 printf("CSUM_ITEM");
 357                 break;
 358         case BTRFS_EXTENT_CSUM_KEY:
 359                 printf("EXTENT_CSUM");
 360                 break;
 361         case BTRFS_EXTENT_DATA_KEY:
 362                 printf("EXTENT_DATA");
 363                 break;
 364         case BTRFS_BLOCK_GROUP_ITEM_KEY:
 365                 printf("BLOCK_GROUP_ITEM");
 366                 break;
 367         case BTRFS_CHUNK_ITEM_KEY:
 368                 printf("CHUNK_ITEM");
 369                 break;
 370         case BTRFS_DEV_ITEM_KEY:
 371                 printf("DEV_ITEM");
 372                 break;
 373         case BTRFS_DEV_EXTENT_KEY:
 374                 printf("DEV_EXTENT");
 375                 break;
 376         case BTRFS_BALANCE_ITEM_KEY:
 377                 printf("BALANCE_ITEM");
 378                 break;
 379         case BTRFS_STRING_ITEM_KEY:
 380                 printf("STRING_ITEM");
 381                 break;
 382         default:
 383                 printf("UNKNOWN");
 384         };
 385 }
 386
 387 static void print_objectid(u64 objectid, u8 type)
 388 {
 389         if (type == BTRFS_DEV_EXTENT_KEY) {
 390                 printf("%llu", (unsigned long long)objectid); /* device id */
 391                 return;
 392         }
 393
 394         switch (objectid) {
 395         case BTRFS_ROOT_TREE_OBJECTID:
 396                 if (type == BTRFS_DEV_ITEM_KEY)
 397                         printf("DEV_ITEMS");
 398                 else
 399                         printf("ROOT_TREE");
 400                 break;
 401         case BTRFS_EXTENT_TREE_OBJECTID:
 402                 printf("EXTENT_TREE");
 403                 break;
 404         case BTRFS_CHUNK_TREE_OBJECTID:
 405                 printf("CHUNK_TREE");
 406                 break;
 407         case BTRFS_DEV_TREE_OBJECTID:
 408                 printf("DEV_TREE");
 409                 break;
 410         case BTRFS_FS_TREE_OBJECTID:
 411                 printf("FS_TREE");
 412                 break;
 413         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 414                 printf("ROOT_TREE_DIR");
 415                 break;
 416         case BTRFS_CSUM_TREE_OBJECTID:
 417                 printf("CSUM_TREE");
 418                 break;
 419         case BTRFS_BALANCE_OBJECTID:
 420                 printf("BALANCE");
 421                 break;
 422         case BTRFS_ORPHAN_OBJECTID:
 423                 printf("ORPHAN");
 424                 break;
 425         case BTRFS_TREE_LOG_OBJECTID:
 426                 printf("TREE_LOG");
 427                 break;
 428         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 429                 printf("LOG_FIXUP");
 430                 break;
 431         case BTRFS_TREE_RELOC_OBJECTID:
 432                 printf("TREE_RELOC");
 433                 break;
 434         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 435                 printf("DATA_RELOC_TREE");
 436                 break;
 437         case BTRFS_EXTENT_CSUM_OBJECTID:
 438                 printf("EXTENT_CSUM");
 439                 break;
 440         case BTRFS_FREE_SPACE_OBJECTID:
 441                 printf("FREE_SPACE");
 442                 break;
 443         case BTRFS_FREE_INO_OBJECTID:
 444                 printf("FREE_INO");
 445                 break;
 446         case BTRFS_MULTIPLE_OBJECTIDS:
 447                 printf("MULTIPLE");
 448                 break;
 449         case BTRFS_FIRST_CHUNK_TREE_OBJECTID:
 450                 if (type == BTRFS_CHUNK_ITEM_KEY) {
 451                         printf("FIRST_CHUNK_TREE");
 452                         break;
 453                 }
 454                 /* fall-thru */
 455         default:
 456                 printf("%llu", (unsigned long long)objectid);
 457         }
 458 }
 459
 460 void btrfs_print_key(struct btrfs_disk_key *disk_key)
 461 {
 462         u64 objectid = btrfs_disk_key_objectid(disk_key);
 463         u8 type = btrfs_disk_key_type(disk_key);
 464
 465         printf("key (");
 466         print_objectid(objectid, type);
 467         printf(" ");
 468         print_key_type(objectid, type);
 469         printf(" %llu)", (unsigned long long)btrfs_disk_key_offset(disk_key));
 470 }
 471
 472 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 473 {
 474         int i;
 475         char *str;
 476         struct btrfs_item *item;
 477         struct btrfs_root_item *ri;
 478         struct btrfs_dir_item *di;
 479         struct btrfs_inode_item *ii;
 480         struct btrfs_file_extent_item *fi;
 481         struct btrfs_block_group_item *bi;
 482         struct btrfs_extent_data_ref *dref;
 483         struct btrfs_shared_data_ref *sref;
 484         struct btrfs_inode_ref *iref;
 485         struct btrfs_dev_extent *dev_extent;
 486         struct btrfs_disk_key disk_key;
 487         struct btrfs_root_item root_item;
 488         struct btrfs_block_group_item bg_item;
 489         struct btrfs_dir_log_item *dlog;
 490         u32 nr = btrfs_header_nritems(l);
 491         u64 objectid;
 492         u32 type;
 493
 494         printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
 495                 (unsigned long long)btrfs_header_bytenr(l), nr,
 496                 btrfs_leaf_free_space(root, l),
 497                 (unsigned long long)btrfs_header_generation(l),
 498                 (unsigned long long)btrfs_header_owner(l));
 499         print_uuids(l);
 500         fflush(stdout);
 501         for (i = 0 ; i < nr ; i++) {
 502                 item = btrfs_item_nr(l, i);
 503                 btrfs_item_key(l, &disk_key, i);
 504                 objectid = btrfs_disk_key_objectid(&disk_key);
 505                 type = btrfs_disk_key_type(&disk_key);
 506                 printf("\titem %d ", i);
 507                 btrfs_print_key(&disk_key);
 508                 printf(" itemoff %d itemsize %d\n",
 509                         btrfs_item_offset(l, item),
 510                         btrfs_item_size(l, item));
 511
 512                 if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID)
 513                         print_free_space_header(l, i);
 514
 515                 switch (type) {
 516                 case BTRFS_INODE_ITEM_KEY:
 517                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
 518                         printf("\t\tinode generation %llu size %llu block group %llu mode %o links %u\n",
 519                                (unsigned long long)btrfs_inode_generation(l, ii),
 520                                (unsigned long long)btrfs_inode_size(l, ii),
 521                                (unsigned long long)btrfs_inode_block_group(l,ii),
 522                                btrfs_inode_mode(l, ii),
 523                                btrfs_inode_nlink(l, ii));
 524                         break;
 525                 case BTRFS_INODE_REF_KEY:
 526                         iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
 527                         print_inode_ref_item(l, item, iref);
 528                         break;
 529                 case BTRFS_DIR_ITEM_KEY:
 530                 case BTRFS_DIR_INDEX_KEY:
 531                 case BTRFS_XATTR_ITEM_KEY:
 532                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 533                         print_dir_item(l, item, di);
 534                         break;
 535                 case BTRFS_DIR_LOG_INDEX_KEY:
 536                 case BTRFS_DIR_LOG_ITEM_KEY:
 537                         dlog = btrfs_item_ptr(l, i, struct btrfs_dir_log_item);
 538                         printf("\t\tdir log end %Lu\n",
 539                                (unsigned long long)btrfs_dir_log_end(l, dlog));
 540                        break;
 541                 case BTRFS_ORPHAN_ITEM_KEY:
 542                         printf("\t\torphan item\n");
 543                         break;
 544                 case BTRFS_ROOT_ITEM_KEY:
 545                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
 546                         read_extent_buffer(l, &root_item, (unsigned long)ri, sizeof(root_item));
 547                         printf("\t\troot data bytenr %llu level %d dirid %llu refs %u gen %llu\n",
 548                                 (unsigned long long)btrfs_root_bytenr(&root_item),
 549                                 btrfs_root_level(&root_item),
 550                                 (unsigned long long)btrfs_root_dirid(&root_item),
 551                                 btrfs_root_refs(&root_item),
 552                                 (unsigned long long)btrfs_root_generation(&root_item));
 553                         if (btrfs_root_refs(&root_item) == 0) {
 554                                 struct btrfs_key drop_key;
 555                                 btrfs_disk_key_to_cpu(&drop_key,
 556                                                       &root_item.drop_progress);
 557                                 printf("\t\tdrop ");
 558                                 btrfs_print_key(&root_item.drop_progress);
 559                                 printf(" level %d\n", root_item.drop_level);
 560                         }
 561                         break;
 562                 case BTRFS_ROOT_REF_KEY:
 563                         print_root_ref(l, i, "ref");
 564                         break;
 565                 case BTRFS_ROOT_BACKREF_KEY:
 566                         print_root_ref(l, i, "backref");
 567                         break;
 568                 case BTRFS_EXTENT_ITEM_KEY:
 569                         print_extent_item(l, i);
 570                         break;
 571                 case BTRFS_TREE_BLOCK_REF_KEY:
 572                         printf("\t\ttree block backref\n");
 573                         break;
 574                 case BTRFS_SHARED_BLOCK_REF_KEY:
 575                         printf("\t\tshared block backref\n");
 576                         break;
 577                 case BTRFS_EXTENT_DATA_REF_KEY:
 578                         dref = btrfs_item_ptr(l, i, struct btrfs_extent_data_ref);
 579                         printf("\t\textent data backref root %llu "
 580                                "objectid %llu offset %llu count %u\n",
 581                                (unsigned long long)btrfs_extent_data_ref_root(l, dref),
 582                                (unsigned long long)btrfs_extent_data_ref_objectid(l, dref),
 583                                (unsigned long long)btrfs_extent_data_ref_offset(l, dref),
 584                                btrfs_extent_data_ref_count(l, dref));
 585                         break;
 586                 case BTRFS_SHARED_DATA_REF_KEY:
 587                         sref = btrfs_item_ptr(l, i, struct btrfs_shared_data_ref);
 588                         printf("\t\tshared data backref count %u\n",
 589                                btrfs_shared_data_ref_count(l, sref));
 590                         break;
 591                 case BTRFS_EXTENT_REF_V0_KEY:
 592 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 593                         print_extent_ref_v0(l, i);
 594 #else
 595                         BUG();
 596 #endif
 597                         break;
 598                 case BTRFS_CSUM_ITEM_KEY:
 599                         printf("\t\tcsum item\n");
 600                         break;
 601                 case BTRFS_EXTENT_CSUM_KEY:
 602                         printf("\t\textent csum item\n");
 603                         break;
 604                 case BTRFS_EXTENT_DATA_KEY:
 605                         fi = btrfs_item_ptr(l, i,
 606                                             struct btrfs_file_extent_item);
 607                         print_file_extent_item(l, item, fi);
 608                         break;
 609                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 610                         bi = btrfs_item_ptr(l, i,
 611                                             struct btrfs_block_group_item);
 612                         read_extent_buffer(l, &bg_item, (unsigned long)bi,
 613                                            sizeof(bg_item));
 614                         printf("\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
 615                                (unsigned long long)btrfs_block_group_used(&bg_item),
 616                                (unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
 617                                (unsigned long long)btrfs_block_group_flags(&bg_item));
 618                         break;
 619                 case BTRFS_CHUNK_ITEM_KEY:
 620                         print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
 621                         break;
 622                 case BTRFS_DEV_ITEM_KEY:
 623                         print_dev_item(l, btrfs_item_ptr(l, i,
 624                                         struct btrfs_dev_item));
 625                         break;
 626                 case BTRFS_DEV_EXTENT_KEY:
 627                         dev_extent = btrfs_item_ptr(l, i,
 628                                                     struct btrfs_dev_extent);
 629                         printf("\t\tdev extent chunk_tree %llu\n"
 630                                "\t\tchunk objectid %llu chunk offset %llu "
 631                                "length %llu\n",
 632                                (unsigned long long)
 633                                btrfs_dev_extent_chunk_tree(l, dev_extent),
 634                                (unsigned long long)
 635                                btrfs_dev_extent_chunk_objectid(l, dev_extent),
 636                                (unsigned long long)
 637                                btrfs_dev_extent_chunk_offset(l, dev_extent),
 638                                (unsigned long long)
 639                                btrfs_dev_extent_length(l, dev_extent));
 640                         break;
 641                 case BTRFS_STRING_ITEM_KEY:
 642                         /* dirty, but it's simple */
 643                         str = l->data + btrfs_item_ptr_offset(l, i);
 644                         printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
 645                         break;
 646                 };
 647                 fflush(stdout);
 648         }
 649 }
 650
 651 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb, int follow)
 652 {
 653         int i;
 654         u32 nr;
 655         u32 size;
 656         struct btrfs_disk_key disk_key;
 657         struct btrfs_key key;
 658
 659         if (!eb)
 660                 return;
 661         nr = btrfs_header_nritems(eb);
 662         if (btrfs_is_leaf(eb)) {
 663                 btrfs_print_leaf(root, eb);
 664                 return;
 665         }
 666         printf("node %llu level %d items %d free %u generation %llu owner %llu\n",
 667                (unsigned long long)eb->start,
 668                 btrfs_header_level(eb), nr,
 669                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
 670                 (unsigned long long)btrfs_header_generation(eb),
 671                 (unsigned long long)btrfs_header_owner(eb));
 672         print_uuids(eb);
 673         fflush(stdout);
 674         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
 675         for (i = 0; i < nr; i++) {
 676                 u64 blocknr = btrfs_node_blockptr(eb, i);
 677                 btrfs_node_key(eb, &disk_key, i);
 678                 btrfs_disk_key_to_cpu(&key, &disk_key);
 679                 printf("\t");
 680                 btrfs_print_key(&disk_key);
 681                 printf(" block %llu (%llu) gen %llu\n",
 682                        (unsigned long long)blocknr,
 683                        (unsigned long long)blocknr / size,
 684                        (unsigned long long)btrfs_node_ptr_generation(eb, i));
 685                 fflush(stdout);
 686         }
 687         if (!follow)
 688                 return;
 689
 690         for (i = 0; i < nr; i++) {
 691                 struct extent_buffer *next = read_tree_block(root,
 692                                              btrfs_node_blockptr(eb, i),
 693                                              size,
 694                                              btrfs_node_ptr_generation(eb, i));
 695                 if (!next) {
 696                         fprintf(stderr, "failed to read %llu in tree %llu\n",
 697                                 (unsigned long long)btrfs_node_blockptr(eb, i),
 698                                 (unsigned long long)btrfs_header_owner(eb));
 699                         continue;
 700                 }
 701                 if (btrfs_is_leaf(next) &&
 702                     btrfs_header_level(eb) != 1)
 703                         BUG();
 704                 if (btrfs_header_level(next) !=
 705                         btrfs_header_level(eb) - 1)
 706                         BUG();
 707                 btrfs_print_tree(root, next, 1);
 708                 free_extent_buffer(next);
 709         }
 710 }