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 static void print_dev_item(struct extent_buffer *eb,
  98                            struct btrfs_dev_item *dev_item)
  99 {
 100         printf("\t\tdev item devid %llu "
 101                "total_bytes %llu bytes used %Lu\n",
 102                (unsigned long long)btrfs_device_id(eb, dev_item),
 103                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
 104                (unsigned long long)btrfs_device_bytes_used(eb, dev_item));
 105 }
 106
 107 static void print_uuids(struct extent_buffer *eb)
 108 {
 109         char fs_uuid[37];
 110         char chunk_uuid[37];
 111         u8 disk_uuid[BTRFS_UUID_SIZE];
 112
 113         read_extent_buffer(eb, disk_uuid, (unsigned long)btrfs_header_fsid(eb),
 114                            BTRFS_FSID_SIZE);
 115
 116         fs_uuid[36] = '\0';
 117         uuid_unparse(disk_uuid, fs_uuid);
 118
 119         read_extent_buffer(eb, disk_uuid,
 120                            (unsigned long)btrfs_header_chunk_tree_uuid(eb),
 121                            BTRFS_UUID_SIZE);
 122
 123         chunk_uuid[36] = '\0';
 124         uuid_unparse(disk_uuid, chunk_uuid);
 125         printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
 126 }
 127
 128 static void print_file_extent_item(struct extent_buffer *eb,
 129                                    struct btrfs_item *item,
 130                                    struct btrfs_file_extent_item *fi)
 131 {
 132         int extent_type = btrfs_file_extent_type(eb, fi);
 133
 134         if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 135                 printf("\t\tinline extent data size %u "
 136                        "ram %u compress %d\n",
 137                   btrfs_file_extent_inline_item_len(eb, item),
 138                   btrfs_file_extent_inline_len(eb, fi),
 139                   btrfs_file_extent_compression(eb, fi));
 140                 return;
 141         }
 142         if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
 143                 printf("\t\tprealloc data disk byte %llu nr %llu\n",
 144                   (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 145                   (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 146                 printf("\t\tprealloc data offset %llu nr %llu\n",
 147                   (unsigned long long)btrfs_file_extent_offset(eb, fi),
 148                   (unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
 149                 return;
 150         }
 151         printf("\t\textent data disk byte %llu nr %llu\n",
 152                 (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 153                 (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 154         printf("\t\textent data offset %llu nr %llu ram %llu\n",
 155                 (unsigned long long)btrfs_file_extent_offset(eb, fi),
 156                 (unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
 157                 (unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
 158         printf("\t\textent compression %d\n",
 159                btrfs_file_extent_compression(eb, fi));
 160 }
 161
 162 static void print_extent_item(struct extent_buffer *eb, int slot)
 163 {
 164         struct btrfs_extent_item *ei;
 165         struct btrfs_extent_inline_ref *iref;
 166         struct btrfs_extent_data_ref *dref;
 167         struct btrfs_shared_data_ref *sref;
 168         struct btrfs_disk_key key;
 169         unsigned long end;
 170         unsigned long ptr;
 171         int type;
 172         u32 item_size = btrfs_item_size_nr(eb, slot);
 173         u64 flags;
 174         u64 offset;
 175
 176         if (item_size < sizeof(*ei)) {
 177 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 178                 struct btrfs_extent_item_v0 *ei0;
 179                 BUG_ON(item_size != sizeof(*ei0));
 180                 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
 181                 printf("\t\textent refs %u\n",
 182                        btrfs_extent_refs_v0(eb, ei0));
 183                 return;
 184 #else
 185                 BUG();
 186 #endif
 187         }
 188
 189         ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
 190         flags = btrfs_extent_flags(eb, ei);
 191
 192         printf("\t\textent refs %llu gen %llu flags %llu\n",
 193                (unsigned long long)btrfs_extent_refs(eb, ei),
 194                (unsigned long long)btrfs_extent_generation(eb, ei),
 195                (unsigned long long)flags);
 196
 197         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
 198                 struct btrfs_tree_block_info *info;
 199                 info = (struct btrfs_tree_block_info *)(ei + 1);
 200                 btrfs_tree_block_key(eb, info, &key);
 201                 printf("\t\ttree block key (%llu %x %llu) level %d\n",
 202                        (unsigned long long)btrfs_disk_key_objectid(&key),
 203                        key.type,
 204                        (unsigned long long)btrfs_disk_key_offset(&key),
 205                        btrfs_tree_block_level(eb, info));
 206                 iref = (struct btrfs_extent_inline_ref *)(info + 1);
 207         } else {
 208                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 209         }
 210
 211         ptr = (unsigned long)iref;
 212         end = (unsigned long)ei + item_size;
 213         while (ptr < end) {
 214                 iref = (struct btrfs_extent_inline_ref *)ptr;
 215                 type = btrfs_extent_inline_ref_type(eb, iref);
 216                 offset = btrfs_extent_inline_ref_offset(eb, iref);
 217                 switch (type) {
 218                 case BTRFS_TREE_BLOCK_REF_KEY:
 219                         printf("\t\ttree block backref root %llu\n",
 220                                (unsigned long long)offset);
 221                         break;
 222                 case BTRFS_SHARED_BLOCK_REF_KEY:
 223                         printf("\t\tshared block backref parent %llu\n",
 224                                (unsigned long long)offset);
 225                         break;
 226                 case BTRFS_EXTENT_DATA_REF_KEY:
 227                         dref = (struct btrfs_extent_data_ref *)(&iref->offset);
 228                         printf("\t\textent data backref root %llu "
 229                                "objectid %llu offset %llu count %u\n",
 230                                (unsigned long long)btrfs_extent_data_ref_root(eb, dref),
 231                                (unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
 232                                (unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
 233                                btrfs_extent_data_ref_count(eb, dref));
 234                         break;
 235                 case BTRFS_SHARED_DATA_REF_KEY:
 236                         sref = (struct btrfs_shared_data_ref *)(iref + 1);
 237                         printf("\t\tshared data backref parent %llu count %u\n",
 238                                (unsigned long long)offset,
 239                                btrfs_shared_data_ref_count(eb, sref));
 240                         break;
 241                 default:
 242                         BUG();
 243                 }
 244                 ptr += btrfs_extent_inline_ref_size(type);
 245         }
 246         WARN_ON(ptr > end);
 247 }
 248
 249 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 250 static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
 251 {
 252         struct btrfs_extent_ref_v0 *ref0;
 253
 254         ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
 255         printf("\t\textent back ref root %llu gen %llu "
 256                 "owner %llu num_refs %lu\n",
 257                 (unsigned long long)btrfs_ref_root_v0(eb, ref0),
 258                 (unsigned long long)btrfs_ref_generation_v0(eb, ref0),
 259                 (unsigned long long)btrfs_ref_objectid_v0(eb, ref0),
 260                 (unsigned long)btrfs_ref_count_v0(eb, ref0));
 261 }
 262 #endif
 263
 264 static void print_root_ref(struct extent_buffer *leaf, int slot, char *tag)
 265 {
 266         struct btrfs_root_ref *ref;
 267         char namebuf[BTRFS_NAME_LEN];
 268         int namelen;
 269
 270         ref = btrfs_item_ptr(leaf, slot, struct btrfs_root_ref);
 271         namelen = btrfs_root_ref_name_len(leaf, ref);
 272         read_extent_buffer(leaf, namebuf, (unsigned long)(ref + 1), namelen);
 273         printf("\t\troot %s key dirid %llu sequence %llu name %.*s\n", tag,
 274                (unsigned long long)btrfs_root_ref_dirid(leaf, ref),
 275                (unsigned long long)btrfs_root_ref_sequence(leaf, ref),
 276                namelen, namebuf);
 277 }
 278
 279 static void print_key_type(u8 type)
 280 {
 281         switch (type) {
 282         case BTRFS_INODE_ITEM_KEY:
 283                 printf("INODE_ITEM");
 284                 break;
 285         case BTRFS_INODE_REF_KEY:
 286                 printf("INODE_REF");
 287                 break;
 288         case BTRFS_DIR_ITEM_KEY:
 289                 printf("DIR_ITEM");
 290                 break;
 291         case BTRFS_DIR_INDEX_KEY:
 292                 printf("DIR_INDEX");
 293                 break;
 294         case BTRFS_DIR_LOG_ITEM_KEY:
 295                 printf("DIR_LOG_ITEM");
 296                 break;
 297         case BTRFS_DIR_LOG_INDEX_KEY:
 298                 printf("DIR_LOG_INDEX");
 299                 break;
 300         case BTRFS_XATTR_ITEM_KEY:
 301                 printf("XATTR_ITEM");
 302                 break;
 303         case BTRFS_ORPHAN_ITEM_KEY:
 304                 printf("ORPHAN_ITEM");
 305                 break;
 306         case BTRFS_ROOT_ITEM_KEY:
 307                 printf("ROOT_ITEM");
 308                 break;
 309         case BTRFS_ROOT_REF_KEY:
 310                 printf("ROOT_REF");
 311                 break;
 312         case BTRFS_ROOT_BACKREF_KEY:
 313                 printf("ROOT_BACKREF");
 314                 break;
 315         case BTRFS_EXTENT_ITEM_KEY:
 316                 printf("EXTENT_ITEM");
 317                 break;
 318         case BTRFS_TREE_BLOCK_REF_KEY:
 319                 printf("TREE_BLOCK_REF");
 320                 break;
 321         case BTRFS_SHARED_BLOCK_REF_KEY:
 322                 printf("SHARED_BLOCK_REF");
 323                 break;
 324         case BTRFS_EXTENT_DATA_REF_KEY:
 325                 printf("EXTENT_DATA_REF");
 326                 break;
 327         case BTRFS_SHARED_DATA_REF_KEY:
 328                 printf("SHARED_DATA_REF");
 329                 break;
 330         case BTRFS_EXTENT_REF_V0_KEY:
 331                 printf("EXTENT_REF_V0");
 332                 break;
 333         case BTRFS_CSUM_ITEM_KEY:
 334                 printf("CSUM_ITEM");
 335                 break;
 336         case BTRFS_EXTENT_CSUM_KEY:
 337                 printf("EXTENT_CSUM");
 338                 break;
 339         case BTRFS_EXTENT_DATA_KEY:
 340                 printf("EXTENT_DATA");
 341                 break;
 342         case BTRFS_BLOCK_GROUP_ITEM_KEY:
 343                 printf("BLOCK_GROUP_ITEM");
 344                 break;
 345         case BTRFS_CHUNK_ITEM_KEY:
 346                 printf("CHUNK_ITEM");
 347                 break;
 348         case BTRFS_DEV_ITEM_KEY:
 349                 printf("DEV_ITEM");
 350                 break;
 351         case BTRFS_DEV_EXTENT_KEY:
 352                 printf("DEV_EXTENT");
 353                 break;
 354         case BTRFS_STRING_ITEM_KEY:
 355                 printf("STRING_ITEM");
 356                 break;
 357         default:
 358                 printf("UNKNOWN");
 359         };
 360 }
 361
 362 static void print_objectid(unsigned long long objectid, u8 type)
 363 {
 364         if (type == BTRFS_DEV_EXTENT_KEY) {
 365                 printf("%llu", objectid); /* device id */
 366                 return;
 367         }
 368
 369         switch (objectid) {
 370         case BTRFS_ROOT_TREE_OBJECTID:
 371                 if (type == BTRFS_DEV_ITEM_KEY)
 372                         printf("DEV_ITEMS");
 373                 else
 374                         printf("ROOT_TREE");
 375                 break;
 376         case BTRFS_EXTENT_TREE_OBJECTID:
 377                 printf("EXTENT_TREE");
 378                 break;
 379         case BTRFS_CHUNK_TREE_OBJECTID:
 380                 printf("CHUNK_TREE");
 381                 break;
 382         case BTRFS_DEV_TREE_OBJECTID:
 383                 printf("DEV_TREE");
 384                 break;
 385         case BTRFS_FS_TREE_OBJECTID:
 386                 printf("FS_TREE");
 387                 break;
 388         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 389                 printf("ROOT_TREE_DIR");
 390                 break;
 391         case BTRFS_CSUM_TREE_OBJECTID:
 392                 printf("CSUM_TREE");
 393                 break;
 394         case BTRFS_ORPHAN_OBJECTID:
 395                 printf("ORPHAN");
 396                 break;
 397         case BTRFS_TREE_LOG_OBJECTID:
 398                 printf("TREE_LOG");
 399                 break;
 400         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 401                 printf("LOG_FIXUP");
 402                 break;
 403         case BTRFS_TREE_RELOC_OBJECTID:
 404                 printf("TREE_RELOC");
 405                 break;
 406         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 407                 printf("DATA_RELOC_TREE");
 408                 break;
 409         case BTRFS_EXTENT_CSUM_OBJECTID:
 410                 printf("EXTENT_CSUM");
 411                 break;
 412         case BTRFS_MULTIPLE_OBJECTIDS:
 413                 printf("MULTIPLE");
 414                 break;
 415         case BTRFS_FIRST_CHUNK_TREE_OBJECTID:
 416                 if (type == BTRFS_CHUNK_ITEM_KEY) {
 417                         printf("FIRST_CHUNK_TREE");
 418                         break;
 419                 }
 420                 /* fall-thru */
 421         default:
 422                 printf("%llu", objectid);
 423         }
 424 }
 425
 426 void btrfs_print_key(struct btrfs_disk_key *disk_key)
 427 {
 428         u8 type;
 429         printf("key (");
 430         type = btrfs_disk_key_type(disk_key);
 431         print_objectid((unsigned long long)btrfs_disk_key_objectid(disk_key),
 432                 type);
 433         printf(" ");
 434         print_key_type(type);
 435         printf(" %llu)", (unsigned long long)btrfs_disk_key_offset(disk_key));
 436 }
 437
 438 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 439 {
 440         int i;
 441         char *str;
 442         struct btrfs_item *item;
 443         struct btrfs_root_item *ri;
 444         struct btrfs_dir_item *di;
 445         struct btrfs_inode_item *ii;
 446         struct btrfs_file_extent_item *fi;
 447         struct btrfs_csum_item *ci;
 448         struct btrfs_block_group_item *bi;
 449         struct btrfs_extent_data_ref *dref;
 450         struct btrfs_shared_data_ref *sref;
 451         struct btrfs_inode_ref *iref;
 452         struct btrfs_dev_extent *dev_extent;
 453         struct btrfs_disk_key disk_key;
 454         struct btrfs_root_item root_item;
 455         struct btrfs_block_group_item bg_item;
 456         struct btrfs_dir_log_item *dlog;
 457         u32 nr = btrfs_header_nritems(l);
 458         u32 type;
 459
 460         printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
 461                 (unsigned long long)btrfs_header_bytenr(l), nr,
 462                 btrfs_leaf_free_space(root, l),
 463                 (unsigned long long)btrfs_header_generation(l),
 464                 (unsigned long long)btrfs_header_owner(l));
 465         print_uuids(l);
 466         fflush(stdout);
 467         for (i = 0 ; i < nr ; i++) {
 468                 item = btrfs_item_nr(l, i);
 469                 btrfs_item_key(l, &disk_key, i);
 470                 type = btrfs_disk_key_type(&disk_key);
 471                 printf("\titem %d ", i);
 472                 btrfs_print_key(&disk_key);
 473                 printf(" itemoff %d itemsize %d\n",
 474                         btrfs_item_offset(l, item),
 475                         btrfs_item_size(l, item));
 476                 switch (type) {
 477                 case BTRFS_INODE_ITEM_KEY:
 478                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
 479                         printf("\t\tinode generation %llu size %llu block group %llu mode %o links %u\n",
 480                                (unsigned long long)btrfs_inode_generation(l, ii),
 481                                (unsigned long long)btrfs_inode_size(l, ii),
 482                                (unsigned long long)btrfs_inode_block_group(l,ii),
 483                                btrfs_inode_mode(l, ii),
 484                                btrfs_inode_nlink(l, ii));
 485                         break;
 486                 case BTRFS_INODE_REF_KEY:
 487                         iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
 488                         print_inode_ref_item(l, item, iref);
 489                         break;
 490                 case BTRFS_DIR_ITEM_KEY:
 491                 case BTRFS_DIR_INDEX_KEY:
 492                 case BTRFS_XATTR_ITEM_KEY:
 493                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 494                         print_dir_item(l, item, di);
 495                         break;
 496                 case BTRFS_DIR_LOG_INDEX_KEY:
 497                 case BTRFS_DIR_LOG_ITEM_KEY:
 498                         dlog = btrfs_item_ptr(l, i, struct btrfs_dir_log_item);
 499                         printf("\t\tdir log end %Lu\n",
 500                                btrfs_dir_log_end(l, dlog));
 501                        break;
 502                 case BTRFS_ORPHAN_ITEM_KEY:
 503                         printf("\t\torphan item\n");
 504                         break;
 505                 case BTRFS_ROOT_ITEM_KEY:
 506                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
 507                         read_extent_buffer(l, &root_item, (unsigned long)ri, sizeof(root_item));
 508                         printf("\t\troot data bytenr %llu level %d dirid %llu refs %u\n",
 509                                 (unsigned long long)btrfs_root_bytenr(&root_item),
 510                                 btrfs_root_level(&root_item),
 511                                 (unsigned long long)btrfs_root_dirid(&root_item),
 512                                 btrfs_root_refs(&root_item));
 513                         if (btrfs_root_refs(&root_item) == 0) {
 514                                 struct btrfs_key drop_key;
 515                                 btrfs_disk_key_to_cpu(&drop_key,
 516                                                       &root_item.drop_progress);
 517                                 printf("\t\tdrop ");
 518                                 btrfs_print_key(&root_item.drop_progress);
 519                                 printf(" level %d\n", root_item.drop_level);
 520                         }
 521                         break;
 522                 case BTRFS_ROOT_REF_KEY:
 523                         print_root_ref(l, i, "ref");
 524                         break;
 525                 case BTRFS_ROOT_BACKREF_KEY:
 526                         print_root_ref(l, i, "backref");
 527                         break;
 528                 case BTRFS_EXTENT_ITEM_KEY:
 529                         print_extent_item(l, i);
 530                         break;
 531                 case BTRFS_TREE_BLOCK_REF_KEY:
 532                         printf("\t\ttree block backref\n");
 533                         break;
 534                 case BTRFS_SHARED_BLOCK_REF_KEY:
 535                         printf("\t\tshared block backref\n");
 536                         break;
 537                 case BTRFS_EXTENT_DATA_REF_KEY:
 538                         dref = btrfs_item_ptr(l, i, struct btrfs_extent_data_ref);
 539                         printf("\t\textent data backref root %llu "
 540                                "objectid %llu offset %llu count %u\n",
 541                                (unsigned long long)btrfs_extent_data_ref_root(l, dref),
 542                                (unsigned long long)btrfs_extent_data_ref_objectid(l, dref),
 543                                (unsigned long long)btrfs_extent_data_ref_offset(l, dref),
 544                                btrfs_extent_data_ref_count(l, dref));
 545                         break;
 546                 case BTRFS_SHARED_DATA_REF_KEY:
 547                         sref = btrfs_item_ptr(l, i, struct btrfs_shared_data_ref);
 548                         printf("\t\tshared data backref count %u\n",
 549                                btrfs_shared_data_ref_count(l, sref));
 550                         break;
 551                 case BTRFS_EXTENT_REF_V0_KEY:
 552 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 553                         print_extent_ref_v0(l, i);
 554 #else
 555                         BUG();
 556 #endif
 557                         break;
 558                 case BTRFS_CSUM_ITEM_KEY:
 559                         ci = btrfs_item_ptr(l, i, struct btrfs_csum_item);
 560                         printf("\t\tcsum item\n");
 561                         break;
 562                 case BTRFS_EXTENT_CSUM_KEY:
 563                         ci = btrfs_item_ptr(l, i, struct btrfs_csum_item);
 564                         printf("\t\textent csum item\n");
 565                         break;
 566                 case BTRFS_EXTENT_DATA_KEY:
 567                         fi = btrfs_item_ptr(l, i,
 568                                             struct btrfs_file_extent_item);
 569                         print_file_extent_item(l, item, fi);
 570                         break;
 571                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 572                         bi = btrfs_item_ptr(l, i,
 573                                             struct btrfs_block_group_item);
 574                         read_extent_buffer(l, &bg_item, (unsigned long)bi,
 575                                            sizeof(bg_item));
 576                         printf("\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
 577                                (unsigned long long)btrfs_block_group_used(&bg_item),
 578                                (unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
 579                                (unsigned long long)btrfs_block_group_flags(&bg_item));
 580                         break;
 581                 case BTRFS_CHUNK_ITEM_KEY:
 582                         print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
 583                         break;
 584                 case BTRFS_DEV_ITEM_KEY:
 585                         print_dev_item(l, btrfs_item_ptr(l, i,
 586                                         struct btrfs_dev_item));
 587                         break;
 588                 case BTRFS_DEV_EXTENT_KEY:
 589                         dev_extent = btrfs_item_ptr(l, i,
 590                                                     struct btrfs_dev_extent);
 591                         printf("\t\tdev extent chunk_tree %llu\n"
 592                                "\t\tchunk objectid %llu chunk offset %llu "
 593                                "length %llu\n",
 594                                (unsigned long long)
 595                                btrfs_dev_extent_chunk_tree(l, dev_extent),
 596                                (unsigned long long)
 597                                btrfs_dev_extent_chunk_objectid(l, dev_extent),
 598                                (unsigned long long)
 599                                btrfs_dev_extent_chunk_offset(l, dev_extent),
 600                                (unsigned long long)
 601                                btrfs_dev_extent_length(l, dev_extent));
 602                         break;
 603                 case BTRFS_STRING_ITEM_KEY:
 604                         /* dirty, but it's simple */
 605                         str = l->data + btrfs_item_ptr_offset(l, i);
 606                         printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
 607                         break;
 608                 };
 609                 fflush(stdout);
 610         }
 611 }
 612
 613 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb, int follow)
 614 {
 615         int i;
 616         u32 nr;
 617         u32 size;
 618         struct btrfs_disk_key disk_key;
 619         struct btrfs_key key;
 620
 621         if (!eb)
 622                 return;
 623         nr = btrfs_header_nritems(eb);
 624         if (btrfs_is_leaf(eb)) {
 625                 btrfs_print_leaf(root, eb);
 626                 return;
 627         }
 628         printf("node %llu level %d items %d free %u generation %llu owner %llu\n",
 629                (unsigned long long)eb->start,
 630                 btrfs_header_level(eb), nr,
 631                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
 632                 (unsigned long long)btrfs_header_generation(eb),
 633                 (unsigned long long)btrfs_header_owner(eb));
 634         print_uuids(eb);
 635         fflush(stdout);
 636         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
 637         for (i = 0; i < nr; i++) {
 638                 u64 blocknr = btrfs_node_blockptr(eb, i);
 639                 btrfs_node_key(eb, &disk_key, i);
 640                 btrfs_disk_key_to_cpu(&key, &disk_key);
 641                 printf("\t");
 642                 btrfs_print_key(&disk_key);
 643                 printf(" block %llu (%llu) gen %llu\n",
 644                        (unsigned long long)blocknr,
 645                        (unsigned long long)blocknr / size,
 646                        (unsigned long long)btrfs_node_ptr_generation(eb, i));
 647                 fflush(stdout);
 648         }
 649         if (!follow)
 650                 return;
 651
 652         for (i = 0; i < nr; i++) {
 653                 struct extent_buffer *next = read_tree_block(root,
 654                                              btrfs_node_blockptr(eb, i),
 655                                              size,
 656                                              btrfs_node_ptr_generation(eb, i));
 657                 if (!next) {
 658                         fprintf(stderr, "failed to read %llu in tree %llu\n",
 659                                 (unsigned long long)btrfs_node_blockptr(eb, i),
 660                                 (unsigned long long)btrfs_header_owner(eb));
 661                         continue;
 662                 }
 663                 if (btrfs_is_leaf(next) &&
 664                     btrfs_header_level(eb) != 1)
 665                         BUG();
 666                 if (btrfs_header_level(next) !=
 667                         btrfs_header_level(eb) - 1)
 668                         BUG();
 669                 btrfs_print_tree(root, next, 1);
 670                 free_extent_buffer(next);
 671         }
 672 }