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