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 #include "utils.h"
  28
  29
  30 static void print_dir_item_type(struct extent_buffer *eb,
  31                                 struct btrfs_dir_item *di)
  32 {
  33         u8 type = btrfs_dir_type(eb, di);
  34
  35         switch (type) {
  36         case BTRFS_FT_REG_FILE:
  37                 printf("FILE");
  38                 break;
  39         case BTRFS_FT_DIR:
  40                 printf("DIR");
  41                 break;
  42         case BTRFS_FT_CHRDEV:
  43                 printf("CHRDEV");
  44                 break;
  45         case BTRFS_FT_BLKDEV:
  46                 printf("BLKDEV");
  47                 break;
  48         case BTRFS_FT_FIFO:
  49                 printf("FIFO");
  50                 break;
  51         case BTRFS_FT_SOCK:
  52                 printf("SOCK");
  53                 break;
  54         case BTRFS_FT_SYMLINK:
  55                 printf("SYMLINK");
  56                 break;
  57         case BTRFS_FT_XATTR:
  58                 printf("XATTR");
  59                 break;
  60         default:
  61                 printf("%u", type);
  62         }
  63 }
  64
  65 static int print_dir_item(struct extent_buffer *eb, struct btrfs_item *item,
  66                           struct btrfs_dir_item *di)
  67 {
  68         u32 total;
  69         u32 cur = 0;
  70         u32 len;
  71         u32 name_len;
  72         u32 data_len;
  73         char namebuf[BTRFS_NAME_LEN];
  74         struct btrfs_disk_key location;
  75
  76         total = btrfs_item_size(eb, item);
  77         while(cur < total) {
  78                 btrfs_dir_item_key(eb, di, &location);
  79                 printf("\t\tlocation ");
  80                 btrfs_print_key(&location);
  81                 printf(" type ");
  82                 print_dir_item_type(eb, di);
  83                 printf("\n");
  84                 name_len = btrfs_dir_name_len(eb, di);
  85                 data_len = btrfs_dir_data_len(eb, di);
  86                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
  87                 read_extent_buffer(eb, namebuf, (unsigned long)(di + 1), len);
  88                 printf("\t\tnamelen %u datalen %u name: %.*s\n",
  89                        name_len, data_len, len, namebuf);
  90                 if (data_len) {
  91                         len = (data_len <= sizeof(namebuf))? data_len: sizeof(namebuf);
  92                         read_extent_buffer(eb, namebuf,
  93                                 (unsigned long)(di + 1) + name_len, len);
  94                         printf("\t\tdata %.*s\n", len, namebuf);
  95                 }
  96                 len = sizeof(*di) + name_len + data_len;
  97                 di = (struct btrfs_dir_item *)((char *)di + len);
  98                 cur += len;
  99         }
 100         return 0;
 101 }
 102
 103 static int print_inode_extref_item(struct extent_buffer *eb,
 104                                    struct btrfs_item *item,
 105                                    struct btrfs_inode_extref *extref)
 106 {
 107         u32 total;
 108         u32 cur = 0;
 109         u32 len;
 110         u32 name_len = 0;
 111         u64 index = 0;
 112         u64 parent_objid;
 113         char namebuf[BTRFS_NAME_LEN];
 114
 115         total = btrfs_item_size(eb, item);
 116
 117         while (cur < total) {
 118                 index = btrfs_inode_extref_index(eb, extref);
 119                 name_len = btrfs_inode_extref_name_len(eb, extref);
 120                 parent_objid = btrfs_inode_extref_parent(eb, extref);
 121
 122                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
 123
 124                 read_extent_buffer(eb, namebuf, (unsigned long)(extref->name), len);
 125
 126                 printf("\t\tinode extref index %llu parent %llu namelen %u "
 127                        "name: %.*s\n",
 128                        (unsigned long long)index,
 129                        (unsigned long long)parent_objid,
 130                        name_len, len, namebuf);
 131
 132                 len = sizeof(*extref) + name_len;
 133                 extref = (struct btrfs_inode_extref *)((char *)extref + len);
 134                 cur += len;
 135         }
 136         return 0;
 137 }
 138
 139 static int print_inode_ref_item(struct extent_buffer *eb, struct btrfs_item *item,
 140                                 struct btrfs_inode_ref *ref)
 141 {
 142         u32 total;
 143         u32 cur = 0;
 144         u32 len;
 145         u32 name_len;
 146         u64 index;
 147         char namebuf[BTRFS_NAME_LEN];
 148         total = btrfs_item_size(eb, item);
 149         while(cur < total) {
 150                 name_len = btrfs_inode_ref_name_len(eb, ref);
 151                 index = btrfs_inode_ref_index(eb, ref);
 152                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
 153                 read_extent_buffer(eb, namebuf, (unsigned long)(ref + 1), len);
 154                 printf("\t\tinode ref index %llu namelen %u name: %.*s\n",
 155                        (unsigned long long)index, name_len, len, namebuf);
 156                 len = sizeof(*ref) + name_len;
 157                 ref = (struct btrfs_inode_ref *)((char *)ref + len);
 158                 cur += len;
 159         }
 160         return 0;
 161 }
 162
 163 /* Caller should ensure sizeof(*ret)>=21 "DATA|METADATA|RAID10" */
 164 static void bg_flags_to_str(u64 flags, char *ret)
 165 {
 166         int empty = 1;
 167
 168         if (flags & BTRFS_BLOCK_GROUP_DATA) {
 169                 empty = 0;
 170                 strcpy(ret, "DATA");
 171         }
 172         if (flags & BTRFS_BLOCK_GROUP_METADATA) {
 173                 if (!empty)
 174                         strcat(ret, "|");
 175                 strcat(ret, "METADATA");
 176         }
 177         if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
 178                 if (!empty)
 179                         strcat(ret, "|");
 180                 strcat(ret, "SYSTEM");
 181         }
 182         switch (flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
 183         case BTRFS_BLOCK_GROUP_RAID0:
 184                 strcat(ret, "|RAID0");
 185                 break;
 186         case BTRFS_BLOCK_GROUP_RAID1:
 187                 strcat(ret, "|RAID1");
 188                 break;
 189         case BTRFS_BLOCK_GROUP_DUP:
 190                 strcat(ret, "|DUP");
 191                 break;
 192         case BTRFS_BLOCK_GROUP_RAID10:
 193                 strcat(ret, "|RAID10");
 194                 break;
 195         case BTRFS_BLOCK_GROUP_RAID5:
 196                 strcat(ret, "|RAID5");
 197                 break;
 198         case BTRFS_BLOCK_GROUP_RAID6:
 199                 strcat(ret, "|RAID6");
 200                 break;
 201         default:
 202                 break;
 203         }
 204 }
 205
 206 /* Caller should ensure sizeof(*ret)>= 26 "OFF|SCANNING|INCONSISTENT" */
 207 static void qgroup_flags_to_str(u64 flags, char *ret)
 208 {
 209         if (flags & BTRFS_QGROUP_STATUS_FLAG_ON)
 210                 strcpy(ret, "ON");
 211         else
 212                 strcpy(ret, "OFF");
 213
 214         if (flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN)
 215                 strcat(ret, "|SCANNING");
 216         if (flags & BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT)
 217                 strcat(ret, "|INCONSISTENT");
 218 }
 219
 220 void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
 221 {
 222         int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
 223         int i;
 224         char chunk_flags_str[32] = {0};
 225
 226         bg_flags_to_str(btrfs_chunk_type(eb, chunk), chunk_flags_str);
 227         printf("\t\tchunk length %llu owner %llu stripe_len %llu\n",
 228                (unsigned long long)btrfs_chunk_length(eb, chunk),
 229                (unsigned long long)btrfs_chunk_owner(eb, chunk),
 230                (unsigned long long)btrfs_chunk_stripe_len(eb, chunk));
 231         printf("\t\ttype %s num_stripes %d\n",
 232                chunk_flags_str, num_stripes);
 233         for (i = 0 ; i < num_stripes ; i++) {
 234                 printf("\t\t\tstripe %d devid %llu offset %llu\n", i,
 235                       (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
 236                       (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
 237         }
 238 }
 239
 240 static void print_dev_item(struct extent_buffer *eb,
 241                            struct btrfs_dev_item *dev_item)
 242 {
 243         char disk_uuid_c[BTRFS_UUID_UNPARSED_SIZE];
 244         u8 disk_uuid[BTRFS_UUID_SIZE];
 245
 246         read_extent_buffer(eb, disk_uuid,
 247                            (unsigned long)btrfs_device_uuid(dev_item),
 248                            BTRFS_UUID_SIZE);
 249         uuid_unparse(disk_uuid, disk_uuid_c);
 250         printf("\t\tdev item devid %llu "
 251                "total_bytes %llu bytes used %Lu\n"
 252                "\t\tdev uuid %s\n",
 253                (unsigned long long)btrfs_device_id(eb, dev_item),
 254                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
 255                (unsigned long long)btrfs_device_bytes_used(eb, dev_item),
 256                disk_uuid_c);
 257 }
 258
 259 static void print_uuids(struct extent_buffer *eb)
 260 {
 261         char fs_uuid[BTRFS_UUID_UNPARSED_SIZE];
 262         char chunk_uuid[BTRFS_UUID_UNPARSED_SIZE];
 263         u8 disk_uuid[BTRFS_UUID_SIZE];
 264
 265         read_extent_buffer(eb, disk_uuid, btrfs_header_fsid(),
 266                            BTRFS_FSID_SIZE);
 267
 268         fs_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 269         uuid_unparse(disk_uuid, fs_uuid);
 270
 271         read_extent_buffer(eb, disk_uuid,
 272                            btrfs_header_chunk_tree_uuid(eb),
 273                            BTRFS_UUID_SIZE);
 274
 275         chunk_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 276         uuid_unparse(disk_uuid, chunk_uuid);
 277         printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
 278 }
 279
 280 static void print_file_extent_item(struct extent_buffer *eb,
 281                                    struct btrfs_item *item,
 282                                    int slot,
 283                                    struct btrfs_file_extent_item *fi)
 284 {
 285         int extent_type = btrfs_file_extent_type(eb, fi);
 286
 287         if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 288                 printf("\t\tinline extent data size %u "
 289                        "ram %u compress %d\n",
 290                   btrfs_file_extent_inline_item_len(eb, item),
 291                   btrfs_file_extent_inline_len(eb, slot, fi),
 292                   btrfs_file_extent_compression(eb, fi));
 293                 return;
 294         }
 295         if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
 296                 printf("\t\tprealloc data disk byte %llu nr %llu\n",
 297                   (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 298                   (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 299                 printf("\t\tprealloc data offset %llu nr %llu\n",
 300                   (unsigned long long)btrfs_file_extent_offset(eb, fi),
 301                   (unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
 302                 return;
 303         }
 304         printf("\t\textent data disk byte %llu nr %llu\n",
 305                 (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 306                 (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 307         printf("\t\textent data offset %llu nr %llu ram %llu\n",
 308                 (unsigned long long)btrfs_file_extent_offset(eb, fi),
 309                 (unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
 310                 (unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
 311         printf("\t\textent compression %d\n",
 312                btrfs_file_extent_compression(eb, fi));
 313 }
 314
 315 /* Caller should ensure sizeof(*ret) >= 16("DATA|TREE_BLOCK") */
 316 static void extent_flags_to_str(u64 flags, char *ret)
 317 {
 318         int empty = 1;
 319
 320         if (flags & BTRFS_EXTENT_FLAG_DATA) {
 321                 empty = 0;
 322                 strcpy(ret, "DATA");
 323         }
 324         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
 325                 if (!empty) {
 326                         empty = 0;
 327                         strcat(ret, "|");
 328                 }
 329                 strcat(ret, "TREE_BLOCK");
 330         }
 331         if (flags & BTRFS_BLOCK_FLAG_FULL_BACKREF) {
 332                 strcat(ret, "|");
 333                 strcat(ret, "FULL_BACKREF");
 334         }
 335 }
 336
 337 void print_extent_item(struct extent_buffer *eb, int slot, int metadata)
 338 {
 339         struct btrfs_extent_item *ei;
 340         struct btrfs_extent_inline_ref *iref;
 341         struct btrfs_extent_data_ref *dref;
 342         struct btrfs_shared_data_ref *sref;
 343         struct btrfs_disk_key key;
 344         unsigned long end;
 345         unsigned long ptr;
 346         int type;
 347         u32 item_size = btrfs_item_size_nr(eb, slot);
 348         u64 flags;
 349         u64 offset;
 350         char flags_str[32] = {0};
 351
 352         if (item_size < sizeof(*ei)) {
 353 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 354                 struct btrfs_extent_item_v0 *ei0;
 355                 BUG_ON(item_size != sizeof(*ei0));
 356                 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
 357                 printf("\t\textent refs %u\n",
 358                        btrfs_extent_refs_v0(eb, ei0));
 359                 return;
 360 #else
 361                 BUG();
 362 #endif
 363         }
 364
 365         ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
 366         flags = btrfs_extent_flags(eb, ei);
 367         extent_flags_to_str(flags, flags_str);
 368
 369         printf("\t\textent refs %llu gen %llu flags %s\n",
 370                (unsigned long long)btrfs_extent_refs(eb, ei),
 371                (unsigned long long)btrfs_extent_generation(eb, ei),
 372                flags_str);
 373
 374         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK && !metadata) {
 375                 struct btrfs_tree_block_info *info;
 376                 info = (struct btrfs_tree_block_info *)(ei + 1);
 377                 btrfs_tree_block_key(eb, info, &key);
 378                 printf("\t\ttree block ");
 379                 btrfs_print_key(&key);
 380                 printf(" level %d\n", btrfs_tree_block_level(eb, info));
 381                 iref = (struct btrfs_extent_inline_ref *)(info + 1);
 382         } else if (metadata) {
 383                 struct btrfs_key tmp;
 384
 385                 btrfs_item_key_to_cpu(eb, &tmp, slot);
 386                 printf("\t\ttree block skinny level %d\n", (int)tmp.offset);
 387                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 388         } else{
 389                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 390         }
 391
 392         ptr = (unsigned long)iref;
 393         end = (unsigned long)ei + item_size;
 394         while (ptr < end) {
 395                 iref = (struct btrfs_extent_inline_ref *)ptr;
 396                 type = btrfs_extent_inline_ref_type(eb, iref);
 397                 offset = btrfs_extent_inline_ref_offset(eb, iref);
 398                 switch (type) {
 399                 case BTRFS_TREE_BLOCK_REF_KEY:
 400                         printf("\t\ttree block backref root %llu\n",
 401                                (unsigned long long)offset);
 402                         break;
 403                 case BTRFS_SHARED_BLOCK_REF_KEY:
 404                         printf("\t\tshared block backref parent %llu\n",
 405                                (unsigned long long)offset);
 406                         break;
 407                 case BTRFS_EXTENT_DATA_REF_KEY:
 408                         dref = (struct btrfs_extent_data_ref *)(&iref->offset);
 409                         printf("\t\textent data backref root %llu "
 410                                "objectid %llu offset %llu count %u\n",
 411                                (unsigned long long)btrfs_extent_data_ref_root(eb, dref),
 412                                (unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
 413                                (unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
 414                                btrfs_extent_data_ref_count(eb, dref));
 415                         break;
 416                 case BTRFS_SHARED_DATA_REF_KEY:
 417                         sref = (struct btrfs_shared_data_ref *)(iref + 1);
 418                         printf("\t\tshared data backref parent %llu count %u\n",
 419                                (unsigned long long)offset,
 420                                btrfs_shared_data_ref_count(eb, sref));
 421                         break;
 422                 default:
 423                         return;
 424                 }
 425                 ptr += btrfs_extent_inline_ref_size(type);
 426         }
 427         WARN_ON(ptr > end);
 428 }
 429
 430 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 431 static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
 432 {
 433         struct btrfs_extent_ref_v0 *ref0;
 434
 435         ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
 436         printf("\t\textent back ref root %llu gen %llu "
 437                 "owner %llu num_refs %lu\n",
 438                 (unsigned long long)btrfs_ref_root_v0(eb, ref0),
 439                 (unsigned long long)btrfs_ref_generation_v0(eb, ref0),
 440                 (unsigned long long)btrfs_ref_objectid_v0(eb, ref0),
 441                 (unsigned long)btrfs_ref_count_v0(eb, ref0));
 442 }
 443 #endif
 444
 445 static void print_root_ref(struct extent_buffer *leaf, int slot, char *tag)
 446 {
 447         struct btrfs_root_ref *ref;
 448         char namebuf[BTRFS_NAME_LEN];
 449         int namelen;
 450
 451         ref = btrfs_item_ptr(leaf, slot, struct btrfs_root_ref);
 452         namelen = btrfs_root_ref_name_len(leaf, ref);
 453         read_extent_buffer(leaf, namebuf, (unsigned long)(ref + 1), namelen);
 454         printf("\t\troot %s key dirid %llu sequence %llu name %.*s\n", tag,
 455                (unsigned long long)btrfs_root_ref_dirid(leaf, ref),
 456                (unsigned long long)btrfs_root_ref_sequence(leaf, ref),
 457                namelen, namebuf);
 458 }
 459
 460 static int count_bytes(void *buf, int len, char b)
 461 {
 462         int cnt = 0;
 463         int i;
 464         for (i = 0; i < len; i++) {
 465                 if (((char*)buf)[i] == b)
 466                         cnt++;
 467         }
 468         return cnt;
 469 }
 470
 471 static void print_root(struct extent_buffer *leaf, int slot)
 472 {
 473         struct btrfs_root_item *ri;
 474         struct btrfs_root_item root_item;
 475         int len;
 476         char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
 477
 478         ri = btrfs_item_ptr(leaf, slot, struct btrfs_root_item);
 479         len = btrfs_item_size_nr(leaf, slot);
 480
 481         memset(&root_item, 0, sizeof(root_item));
 482         read_extent_buffer(leaf, &root_item, (unsigned long)ri, len);
 483
 484         printf("\t\troot data bytenr %llu level %d dirid %llu refs %u gen %llu\n",
 485                 (unsigned long long)btrfs_root_bytenr(&root_item),
 486                 btrfs_root_level(&root_item),
 487                 (unsigned long long)btrfs_root_dirid(&root_item),
 488                 btrfs_root_refs(&root_item),
 489                 (unsigned long long)btrfs_root_generation(&root_item));
 490
 491         if (root_item.generation == root_item.generation_v2) {
 492                 uuid_unparse(root_item.uuid, uuid_str);
 493                 printf("\t\tuuid %s\n", uuid_str);
 494                 if (count_bytes(root_item.parent_uuid, BTRFS_UUID_SIZE, 0) != BTRFS_UUID_SIZE) {
 495                         uuid_unparse(root_item.parent_uuid, uuid_str);
 496                         printf("\t\tparent_uuid %s\n", uuid_str);
 497                 }
 498                 if (count_bytes(root_item.received_uuid, BTRFS_UUID_SIZE, 0) != BTRFS_UUID_SIZE) {
 499                         uuid_unparse(root_item.received_uuid, uuid_str);
 500                         printf("\t\treceived_uuid %s\n", uuid_str);
 501                 }
 502                 if (root_item.ctransid) {
 503                         printf("\t\tctransid %llu otransid %llu stransid %llu rtransid %llu\n",
 504                                 btrfs_root_ctransid(&root_item),
 505                                 btrfs_root_otransid(&root_item),
 506                                 btrfs_root_stransid(&root_item),
 507                                 btrfs_root_rtransid(&root_item));
 508                 }
 509         }
 510         if (btrfs_root_refs(&root_item) == 0) {
 511                 struct btrfs_key drop_key;
 512                 btrfs_disk_key_to_cpu(&drop_key,
 513                                       &root_item.drop_progress);
 514                 printf("\t\tdrop ");
 515                 btrfs_print_key(&root_item.drop_progress);
 516                 printf(" level %d\n", root_item.drop_level);
 517         }
 518 }
 519
 520 static void print_free_space_header(struct extent_buffer *leaf, int slot)
 521 {
 522         struct btrfs_free_space_header *header;
 523         struct btrfs_disk_key location;
 524
 525         header = btrfs_item_ptr(leaf, slot, struct btrfs_free_space_header);
 526         btrfs_free_space_key(leaf, header, &location);
 527         printf("\t\tlocation ");
 528         btrfs_print_key(&location);
 529         printf("\n");
 530         printf("\t\tcache generation %llu entries %llu bitmaps %llu\n",
 531                (unsigned long long)btrfs_free_space_generation(leaf, header),
 532                (unsigned long long)btrfs_free_space_entries(leaf, header),
 533                (unsigned long long)btrfs_free_space_bitmaps(leaf, header));
 534 }
 535
 536 static void print_key_type(u64 objectid, u8 type)
 537 {
 538         if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID) {
 539                 printf("UNTYPED");
 540                 return;
 541         }
 542
 543         switch (type) {
 544         case BTRFS_INODE_ITEM_KEY:
 545                 printf("INODE_ITEM");
 546                 break;
 547         case BTRFS_INODE_REF_KEY:
 548                 printf("INODE_REF");
 549                 break;
 550         case BTRFS_INODE_EXTREF_KEY:
 551                 printf("INODE_EXTREF");
 552                 break;
 553         case BTRFS_DIR_ITEM_KEY:
 554                 printf("DIR_ITEM");
 555                 break;
 556         case BTRFS_DIR_INDEX_KEY:
 557                 printf("DIR_INDEX");
 558                 break;
 559         case BTRFS_DIR_LOG_ITEM_KEY:
 560                 printf("DIR_LOG_ITEM");
 561                 break;
 562         case BTRFS_DIR_LOG_INDEX_KEY:
 563                 printf("DIR_LOG_INDEX");
 564                 break;
 565         case BTRFS_XATTR_ITEM_KEY:
 566                 printf("XATTR_ITEM");
 567                 break;
 568         case BTRFS_ORPHAN_ITEM_KEY:
 569                 printf("ORPHAN_ITEM");
 570                 break;
 571         case BTRFS_ROOT_ITEM_KEY:
 572                 printf("ROOT_ITEM");
 573                 break;
 574         case BTRFS_ROOT_REF_KEY:
 575                 printf("ROOT_REF");
 576                 break;
 577         case BTRFS_ROOT_BACKREF_KEY:
 578                 printf("ROOT_BACKREF");
 579                 break;
 580         case BTRFS_EXTENT_ITEM_KEY:
 581                 printf("EXTENT_ITEM");
 582                 break;
 583         case BTRFS_METADATA_ITEM_KEY:
 584                 printf("METADATA_ITEM");
 585                 break;
 586         case BTRFS_TREE_BLOCK_REF_KEY:
 587                 printf("TREE_BLOCK_REF");
 588                 break;
 589         case BTRFS_SHARED_BLOCK_REF_KEY:
 590                 printf("SHARED_BLOCK_REF");
 591                 break;
 592         case BTRFS_EXTENT_DATA_REF_KEY:
 593                 printf("EXTENT_DATA_REF");
 594                 break;
 595         case BTRFS_SHARED_DATA_REF_KEY:
 596                 printf("SHARED_DATA_REF");
 597                 break;
 598         case BTRFS_EXTENT_REF_V0_KEY:
 599                 printf("EXTENT_REF_V0");
 600                 break;
 601         case BTRFS_CSUM_ITEM_KEY:
 602                 printf("CSUM_ITEM");
 603                 break;
 604         case BTRFS_EXTENT_CSUM_KEY:
 605                 printf("EXTENT_CSUM");
 606                 break;
 607         case BTRFS_EXTENT_DATA_KEY:
 608                 printf("EXTENT_DATA");
 609                 break;
 610         case BTRFS_BLOCK_GROUP_ITEM_KEY:
 611                 printf("BLOCK_GROUP_ITEM");
 612                 break;
 613         case BTRFS_CHUNK_ITEM_KEY:
 614                 printf("CHUNK_ITEM");
 615                 break;
 616         case BTRFS_DEV_ITEM_KEY:
 617                 printf("DEV_ITEM");
 618                 break;
 619         case BTRFS_DEV_EXTENT_KEY:
 620                 printf("DEV_EXTENT");
 621                 break;
 622         case BTRFS_BALANCE_ITEM_KEY:
 623                 printf("BALANCE_ITEM");
 624                 break;
 625         case BTRFS_DEV_REPLACE_KEY:
 626                 printf("DEV_REPLACE");
 627                 break;
 628         case BTRFS_STRING_ITEM_KEY:
 629                 printf("STRING_ITEM");
 630                 break;
 631         case BTRFS_QGROUP_STATUS_KEY:
 632                 printf("QGROUP_STATUS");
 633                 break;
 634         case BTRFS_QGROUP_RELATION_KEY:
 635                 printf("QGROUP_RELATION");
 636                 break;
 637         case BTRFS_QGROUP_INFO_KEY:
 638                 printf("QGROUP_INFO");
 639                 break;
 640         case BTRFS_QGROUP_LIMIT_KEY:
 641                 printf("QGROUP_LIMIT");
 642                 break;
 643         case BTRFS_DEV_STATS_KEY:
 644                 printf("DEV_STATS");
 645                 break;
 646         case BTRFS_UUID_KEY_SUBVOL:
 647                 printf("UUID_KEY_SUBVOL");
 648                 break;
 649         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 650                 printf("UUID_KEY_RECEIVED_SUBVOL");
 651                 break;
 652         default:
 653                 printf("UNKNOWN.%d", type);
 654         };
 655 }
 656
 657 static void print_objectid(u64 objectid, u8 type)
 658 {
 659         switch (type) {
 660         case BTRFS_DEV_EXTENT_KEY:
 661                 printf("%llu", (unsigned long long)objectid); /* device id */
 662                 return;
 663         case BTRFS_QGROUP_RELATION_KEY:
 664                 printf("%llu/%llu", btrfs_qgroup_level(objectid),
 665                        btrfs_qgroup_subvid(objectid));
 666                 return;
 667         case BTRFS_UUID_KEY_SUBVOL:
 668         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 669                 printf("0x%016llx", (unsigned long long)objectid);
 670                 return;
 671         }
 672
 673         switch (objectid) {
 674         case BTRFS_ROOT_TREE_OBJECTID:
 675                 if (type == BTRFS_DEV_ITEM_KEY)
 676                         printf("DEV_ITEMS");
 677                 else
 678                         printf("ROOT_TREE");
 679                 break;
 680         case BTRFS_EXTENT_TREE_OBJECTID:
 681                 printf("EXTENT_TREE");
 682                 break;
 683         case BTRFS_CHUNK_TREE_OBJECTID:
 684                 printf("CHUNK_TREE");
 685                 break;
 686         case BTRFS_DEV_TREE_OBJECTID:
 687                 printf("DEV_TREE");
 688                 break;
 689         case BTRFS_FS_TREE_OBJECTID:
 690                 printf("FS_TREE");
 691                 break;
 692         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 693                 printf("ROOT_TREE_DIR");
 694                 break;
 695         case BTRFS_CSUM_TREE_OBJECTID:
 696                 printf("CSUM_TREE");
 697                 break;
 698         case BTRFS_BALANCE_OBJECTID:
 699                 printf("BALANCE");
 700                 break;
 701         case BTRFS_ORPHAN_OBJECTID:
 702                 printf("ORPHAN");
 703                 break;
 704         case BTRFS_TREE_LOG_OBJECTID:
 705                 printf("TREE_LOG");
 706                 break;
 707         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 708                 printf("LOG_FIXUP");
 709                 break;
 710         case BTRFS_TREE_RELOC_OBJECTID:
 711                 printf("TREE_RELOC");
 712                 break;
 713         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 714                 printf("DATA_RELOC_TREE");
 715                 break;
 716         case BTRFS_EXTENT_CSUM_OBJECTID:
 717                 printf("EXTENT_CSUM");
 718                 break;
 719         case BTRFS_FREE_SPACE_OBJECTID:
 720                 printf("FREE_SPACE");
 721                 break;
 722         case BTRFS_FREE_INO_OBJECTID:
 723                 printf("FREE_INO");
 724                 break;
 725         case BTRFS_QUOTA_TREE_OBJECTID:
 726                 printf("QUOTA_TREE");
 727                 break;
 728         case BTRFS_UUID_TREE_OBJECTID:
 729                 printf("UUID_TREE");
 730                 break;
 731         case BTRFS_MULTIPLE_OBJECTIDS:
 732                 printf("MULTIPLE");
 733                 break;
 734         case (u64)-1:
 735                 printf("-1");
 736                 break;
 737         case BTRFS_FIRST_CHUNK_TREE_OBJECTID:
 738                 if (type == BTRFS_CHUNK_ITEM_KEY) {
 739                         printf("FIRST_CHUNK_TREE");
 740                         break;
 741                 }
 742                 /* fall-thru */
 743         default:
 744                 printf("%llu", (unsigned long long)objectid);
 745         }
 746 }
 747
 748 void btrfs_print_key(struct btrfs_disk_key *disk_key)
 749 {
 750         u64 objectid = btrfs_disk_key_objectid(disk_key);
 751         u8 type = btrfs_disk_key_type(disk_key);
 752         u64 offset = btrfs_disk_key_offset(disk_key);
 753
 754         printf("key (");
 755         print_objectid(objectid, type);
 756         printf(" ");
 757         print_key_type(objectid, type);
 758         switch (type) {
 759         case BTRFS_QGROUP_RELATION_KEY:
 760         case BTRFS_QGROUP_INFO_KEY:
 761         case BTRFS_QGROUP_LIMIT_KEY:
 762                 printf(" %llu/%llu)", btrfs_qgroup_level(offset),
 763                        btrfs_qgroup_subvid(offset));
 764                 break;
 765         case BTRFS_UUID_KEY_SUBVOL:
 766         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 767                 printf(" 0x%016llx)", (unsigned long long)offset);
 768                 break;
 769         default:
 770                 if (offset == (u64)-1)
 771                         printf(" -1)");
 772                 else
 773                         printf(" %llu)", (unsigned long long)offset);
 774                 break;
 775         }
 776 }
 777
 778 static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
 779                             u32 item_size)
 780 {
 781         if (item_size & (sizeof(u64) - 1)) {
 782                 printf("btrfs: uuid item with illegal size %lu!\n",
 783                        (unsigned long)item_size);
 784                 return;
 785         }
 786         while (item_size) {
 787                 __le64 subvol_id;
 788
 789                 read_extent_buffer(l, &subvol_id, offset, sizeof(u64));
 790                 printf("\t\tsubvol_id %llu\n",
 791                         (unsigned long long)le64_to_cpu(subvol_id));
 792                 item_size -= sizeof(u64);
 793                 offset += sizeof(u64);
 794         }
 795 }
 796
 797 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 798 {
 799         int i;
 800         char *str;
 801         struct btrfs_item *item;
 802         struct btrfs_dir_item *di;
 803         struct btrfs_inode_item *ii;
 804         struct btrfs_file_extent_item *fi;
 805         struct btrfs_block_group_item *bi;
 806         struct btrfs_extent_data_ref *dref;
 807         struct btrfs_shared_data_ref *sref;
 808         struct btrfs_inode_ref *iref;
 809         struct btrfs_inode_extref *iref2;
 810         struct btrfs_dev_extent *dev_extent;
 811         struct btrfs_disk_key disk_key;
 812         struct btrfs_block_group_item bg_item;
 813         struct btrfs_dir_log_item *dlog;
 814         struct btrfs_qgroup_info_item *qg_info;
 815         struct btrfs_qgroup_limit_item *qg_limit;
 816         struct btrfs_qgroup_status_item *qg_status;
 817         u32 nr = btrfs_header_nritems(l);
 818         u64 objectid;
 819         u32 type;
 820         char flags_str[32];
 821
 822         printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
 823                 (unsigned long long)btrfs_header_bytenr(l), nr,
 824                 btrfs_leaf_free_space(root, l),
 825                 (unsigned long long)btrfs_header_generation(l),
 826                 (unsigned long long)btrfs_header_owner(l));
 827         print_uuids(l);
 828         fflush(stdout);
 829         for (i = 0 ; i < nr ; i++) {
 830                 item = btrfs_item_nr(i);
 831                 btrfs_item_key(l, &disk_key, i);
 832                 objectid = btrfs_disk_key_objectid(&disk_key);
 833                 type = btrfs_disk_key_type(&disk_key);
 834                 printf("\titem %d ", i);
 835                 btrfs_print_key(&disk_key);
 836                 printf(" itemoff %d itemsize %d\n",
 837                         btrfs_item_offset(l, item),
 838                         btrfs_item_size(l, item));
 839
 840                 if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID)
 841                         print_free_space_header(l, i);
 842
 843                 switch (type) {
 844                 case BTRFS_INODE_ITEM_KEY:
 845                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
 846                         printf("\t\tinode generation %llu transid %llu size %llu nbytes %llu\n"
 847                                "\t\tblock group %llu mode %o links %u uid %u gid %u\n"
 848                                "\t\trdev %llu flags 0x%llx\n",
 849                                (unsigned long long)btrfs_inode_generation(l, ii),
 850                                (unsigned long long)btrfs_inode_transid(l, ii),
 851                                (unsigned long long)btrfs_inode_size(l, ii),
 852                                (unsigned long long)btrfs_inode_nbytes(l, ii),
 853                                (unsigned long long)btrfs_inode_block_group(l,ii),
 854                                btrfs_inode_mode(l, ii),
 855                                btrfs_inode_nlink(l, ii),
 856                                btrfs_inode_uid(l, ii),
 857                                btrfs_inode_gid(l, ii),
 858                                (unsigned long long)btrfs_inode_rdev(l,ii),
 859                                (unsigned long long)btrfs_inode_flags(l,ii));
 860                         break;
 861                 case BTRFS_INODE_REF_KEY:
 862                         iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
 863                         print_inode_ref_item(l, item, iref);
 864                         break;
 865                 case BTRFS_INODE_EXTREF_KEY:
 866                         iref2 = btrfs_item_ptr(l, i, struct btrfs_inode_extref);
 867                         print_inode_extref_item(l, item, iref2);
 868                         break;
 869                 case BTRFS_DIR_ITEM_KEY:
 870                 case BTRFS_DIR_INDEX_KEY:
 871                 case BTRFS_XATTR_ITEM_KEY:
 872                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 873                         print_dir_item(l, item, di);
 874                         break;
 875                 case BTRFS_DIR_LOG_INDEX_KEY:
 876                 case BTRFS_DIR_LOG_ITEM_KEY:
 877                         dlog = btrfs_item_ptr(l, i, struct btrfs_dir_log_item);
 878                         printf("\t\tdir log end %Lu\n",
 879                                (unsigned long long)btrfs_dir_log_end(l, dlog));
 880                        break;
 881                 case BTRFS_ORPHAN_ITEM_KEY:
 882                         printf("\t\torphan item\n");
 883                         break;
 884                 case BTRFS_ROOT_ITEM_KEY:
 885                         print_root(l, i);
 886                         break;
 887                 case BTRFS_ROOT_REF_KEY:
 888                         print_root_ref(l, i, "ref");
 889                         break;
 890                 case BTRFS_ROOT_BACKREF_KEY:
 891                         print_root_ref(l, i, "backref");
 892                         break;
 893                 case BTRFS_EXTENT_ITEM_KEY:
 894                         print_extent_item(l, i, 0);
 895                         break;
 896                 case BTRFS_METADATA_ITEM_KEY:
 897                         print_extent_item(l, i, 1);
 898                         break;
 899                 case BTRFS_TREE_BLOCK_REF_KEY:
 900                         printf("\t\ttree block backref\n");
 901                         break;
 902                 case BTRFS_SHARED_BLOCK_REF_KEY:
 903                         printf("\t\tshared block backref\n");
 904                         break;
 905                 case BTRFS_EXTENT_DATA_REF_KEY:
 906                         dref = btrfs_item_ptr(l, i, struct btrfs_extent_data_ref);
 907                         printf("\t\textent data backref root %llu "
 908                                "objectid %llu offset %llu count %u\n",
 909                                (unsigned long long)btrfs_extent_data_ref_root(l, dref),
 910                                (unsigned long long)btrfs_extent_data_ref_objectid(l, dref),
 911                                (unsigned long long)btrfs_extent_data_ref_offset(l, dref),
 912                                btrfs_extent_data_ref_count(l, dref));
 913                         break;
 914                 case BTRFS_SHARED_DATA_REF_KEY:
 915                         sref = btrfs_item_ptr(l, i, struct btrfs_shared_data_ref);
 916                         printf("\t\tshared data backref count %u\n",
 917                                btrfs_shared_data_ref_count(l, sref));
 918                         break;
 919                 case BTRFS_EXTENT_REF_V0_KEY:
 920 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 921                         print_extent_ref_v0(l, i);
 922 #else
 923                         BUG();
 924 #endif
 925                         break;
 926                 case BTRFS_CSUM_ITEM_KEY:
 927                         printf("\t\tcsum item\n");
 928                         break;
 929                 case BTRFS_EXTENT_CSUM_KEY:
 930                         printf("\t\textent csum item\n");
 931                         break;
 932                 case BTRFS_EXTENT_DATA_KEY:
 933                         fi = btrfs_item_ptr(l, i,
 934                                             struct btrfs_file_extent_item);
 935                         print_file_extent_item(l, item, i, fi);
 936                         break;
 937                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 938                         bi = btrfs_item_ptr(l, i,
 939                                             struct btrfs_block_group_item);
 940                         read_extent_buffer(l, &bg_item, (unsigned long)bi,
 941                                            sizeof(bg_item));
 942                         memset(flags_str, 0, sizeof(flags_str));
 943                         bg_flags_to_str(btrfs_block_group_flags(&bg_item),
 944                                         flags_str);
 945                         printf("\t\tblock group used %llu chunk_objectid %llu flags %s\n",
 946                                (unsigned long long)btrfs_block_group_used(&bg_item),
 947                                (unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
 948                                flags_str);
 949                         break;
 950                 case BTRFS_CHUNK_ITEM_KEY:
 951                         print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
 952                         break;
 953                 case BTRFS_DEV_ITEM_KEY:
 954                         print_dev_item(l, btrfs_item_ptr(l, i,
 955                                         struct btrfs_dev_item));
 956                         break;
 957                 case BTRFS_DEV_EXTENT_KEY:
 958                         dev_extent = btrfs_item_ptr(l, i,
 959                                                     struct btrfs_dev_extent);
 960                         printf("\t\tdev extent chunk_tree %llu\n"
 961                                "\t\tchunk objectid %llu chunk offset %llu "
 962                                "length %llu\n",
 963                                (unsigned long long)
 964                                btrfs_dev_extent_chunk_tree(l, dev_extent),
 965                                (unsigned long long)
 966                                btrfs_dev_extent_chunk_objectid(l, dev_extent),
 967                                (unsigned long long)
 968                                btrfs_dev_extent_chunk_offset(l, dev_extent),
 969                                (unsigned long long)
 970                                btrfs_dev_extent_length(l, dev_extent));
 971                         break;
 972                 case BTRFS_QGROUP_STATUS_KEY:
 973                         qg_status = btrfs_item_ptr(l, i,
 974                                         struct btrfs_qgroup_status_item);
 975                         memset(flags_str, 0, sizeof(flags_str));
 976                         qgroup_flags_to_str(btrfs_qgroup_status_flags(l, qg_status),
 977                                         flags_str);
 978                         printf("\t\tversion %llu generation %llu flags %s "
 979                                 "scan %lld\n",
 980                                 (unsigned long long)
 981                                 btrfs_qgroup_status_version(l, qg_status),
 982                                 (unsigned long long)
 983                                 btrfs_qgroup_status_generation(l, qg_status),
 984                                 flags_str,
 985                                 (unsigned long long)
 986                                 btrfs_qgroup_status_scan(l, qg_status));
 987                         break;
 988                 case BTRFS_QGROUP_RELATION_KEY:
 989                         break;
 990                 case BTRFS_QGROUP_INFO_KEY:
 991                         qg_info = btrfs_item_ptr(l, i,
 992                                                  struct btrfs_qgroup_info_item);
 993                         printf("\t\tgeneration %llu\n"
 994                              "\t\treferenced %llu referenced compressed %llu\n"
 995                              "\t\texclusive %llu exclusive compressed %llu\n",
 996                                (unsigned long long)
 997                                btrfs_qgroup_info_generation(l, qg_info),
 998                                (unsigned long long)
 999                                btrfs_qgroup_info_referenced(l, qg_info),
1000                                (unsigned long long)
1001                                btrfs_qgroup_info_referenced_compressed(l,
1002                                                                        qg_info),
1003                                (unsigned long long)
1004                                btrfs_qgroup_info_exclusive(l, qg_info),
1005                                (unsigned long long)
1006                                btrfs_qgroup_info_exclusive_compressed(l,
1007                                                                       qg_info));
1008                         break;
1009                 case BTRFS_QGROUP_LIMIT_KEY:
1010                         qg_limit = btrfs_item_ptr(l, i,
1011                                          struct btrfs_qgroup_limit_item);
1012                         printf("\t\tflags %llx\n"
1013                              "\t\tmax referenced %lld max exclusive %lld\n"
1014                              "\t\trsv referenced %lld rsv exclusive %lld\n",
1015                                (unsigned long long)
1016                                btrfs_qgroup_limit_flags(l, qg_limit),
1017                                (long long)
1018                                btrfs_qgroup_limit_max_referenced(l, qg_limit),
1019                                (long long)
1020                                btrfs_qgroup_limit_max_exclusive(l, qg_limit),
1021                                (long long)
1022                                btrfs_qgroup_limit_rsv_referenced(l, qg_limit),
1023                                (long long)
1024                                btrfs_qgroup_limit_rsv_exclusive(l, qg_limit));
1025                         break;
1026                 case BTRFS_UUID_KEY_SUBVOL:
1027                 case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
1028                         print_uuid_item(l, btrfs_item_ptr_offset(l, i),
1029                                         btrfs_item_size_nr(l, i));
1030                         break;
1031                 case BTRFS_STRING_ITEM_KEY:
1032                         /* dirty, but it's simple */
1033                         str = l->data + btrfs_item_ptr_offset(l, i);
1034                         printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
1035                         break;
1036                 case BTRFS_DEV_STATS_KEY:
1037                         printf("\t\tdevice stats\n");
1038                         break;
1039                 };
1040                 fflush(stdout);
1041         }
1042 }
1043
1044 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb, int follow)
1045 {
1046         int i;
1047         u32 nr;
1048         u32 size;
1049         struct btrfs_disk_key disk_key;
1050         struct btrfs_key key;
1051
1052         if (!eb)
1053                 return;
1054         nr = btrfs_header_nritems(eb);
1055         if (btrfs_is_leaf(eb)) {
1056                 btrfs_print_leaf(root, eb);
1057                 return;
1058         }
1059         printf("node %llu level %d items %d free %u generation %llu owner %llu\n",
1060                (unsigned long long)eb->start,
1061                 btrfs_header_level(eb), nr,
1062                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
1063                 (unsigned long long)btrfs_header_generation(eb),
1064                 (unsigned long long)btrfs_header_owner(eb));
1065         print_uuids(eb);
1066         fflush(stdout);
1067         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
1068         for (i = 0; i < nr; i++) {
1069                 u64 blocknr = btrfs_node_blockptr(eb, i);
1070                 btrfs_node_key(eb, &disk_key, i);
1071                 btrfs_disk_key_to_cpu(&key, &disk_key);
1072                 printf("\t");
1073                 btrfs_print_key(&disk_key);
1074                 printf(" block %llu (%llu) gen %llu\n",
1075                        (unsigned long long)blocknr,
1076                        (unsigned long long)blocknr / size,
1077                        (unsigned long long)btrfs_node_ptr_generation(eb, i));
1078                 fflush(stdout);
1079         }
1080         if (!follow)
1081                 return;
1082
1083         for (i = 0; i < nr; i++) {
1084                 struct extent_buffer *next = read_tree_block(root,
1085                                              btrfs_node_blockptr(eb, i),
1086                                              size,
1087                                              btrfs_node_ptr_generation(eb, i));
1088                 if (!extent_buffer_uptodate(next)) {
1089                         fprintf(stderr, "failed to read %llu in tree %llu\n",
1090                                 (unsigned long long)btrfs_node_blockptr(eb, i),
1091                                 (unsigned long long)btrfs_header_owner(eb));
1092                         continue;
1093                 }
1094                 if (btrfs_is_leaf(next) &&
1095                     btrfs_header_level(eb) != 1)
1096                         BUG();
1097                 if (btrfs_header_level(next) !=
1098                         btrfs_header_level(eb) - 1)
1099                         BUG();
1100                 btrfs_print_tree(root, next, 1);
1101                 free_extent_buffer(next);
1102         }
1103 }