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 static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
 164 {
 165         int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
 166         int i;
 167         printf("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
 168                (unsigned long long)btrfs_chunk_length(eb, chunk),
 169                (unsigned long long)btrfs_chunk_owner(eb, chunk),
 170                (unsigned long long)btrfs_chunk_type(eb, chunk),
 171                num_stripes);
 172         for (i = 0 ; i < num_stripes ; i++) {
 173                 printf("\t\t\tstripe %d devid %llu offset %llu\n", i,
 174                       (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
 175                       (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
 176         }
 177 }
 178
 179 static void print_dev_item(struct extent_buffer *eb,
 180                            struct btrfs_dev_item *dev_item)
 181 {
 182         printf("\t\tdev item devid %llu "
 183                "total_bytes %llu bytes used %Lu\n",
 184                (unsigned long long)btrfs_device_id(eb, dev_item),
 185                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
 186                (unsigned long long)btrfs_device_bytes_used(eb, dev_item));
 187 }
 188
 189 static void print_uuids(struct extent_buffer *eb)
 190 {
 191         char fs_uuid[BTRFS_UUID_UNPARSED_SIZE];
 192         char chunk_uuid[BTRFS_UUID_UNPARSED_SIZE];
 193         u8 disk_uuid[BTRFS_UUID_SIZE];
 194
 195         read_extent_buffer(eb, disk_uuid, btrfs_header_fsid(),
 196                            BTRFS_FSID_SIZE);
 197
 198         fs_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 199         uuid_unparse(disk_uuid, fs_uuid);
 200
 201         read_extent_buffer(eb, disk_uuid,
 202                            btrfs_header_chunk_tree_uuid(eb),
 203                            BTRFS_UUID_SIZE);
 204
 205         chunk_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 206         uuid_unparse(disk_uuid, chunk_uuid);
 207         printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
 208 }
 209
 210 static void print_file_extent_item(struct extent_buffer *eb,
 211                                    struct btrfs_item *item,
 212                                    int slot,
 213                                    struct btrfs_file_extent_item *fi)
 214 {
 215         int extent_type = btrfs_file_extent_type(eb, fi);
 216
 217         if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 218                 printf("\t\tinline extent data size %u "
 219                        "ram %u compress %d\n",
 220                   btrfs_file_extent_inline_item_len(eb, item),
 221                   btrfs_file_extent_inline_len(eb, slot, fi),
 222                   btrfs_file_extent_compression(eb, fi));
 223                 return;
 224         }
 225         if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
 226                 printf("\t\tprealloc data disk byte %llu nr %llu\n",
 227                   (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 228                   (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 229                 printf("\t\tprealloc data offset %llu nr %llu\n",
 230                   (unsigned long long)btrfs_file_extent_offset(eb, fi),
 231                   (unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
 232                 return;
 233         }
 234         printf("\t\textent data disk byte %llu nr %llu\n",
 235                 (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 236                 (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 237         printf("\t\textent data offset %llu nr %llu ram %llu\n",
 238                 (unsigned long long)btrfs_file_extent_offset(eb, fi),
 239                 (unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
 240                 (unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
 241         printf("\t\textent compression %d\n",
 242                btrfs_file_extent_compression(eb, fi));
 243 }
 244
 245 static void print_extent_item(struct extent_buffer *eb, int slot, int metadata)
 246 {
 247         struct btrfs_extent_item *ei;
 248         struct btrfs_extent_inline_ref *iref;
 249         struct btrfs_extent_data_ref *dref;
 250         struct btrfs_shared_data_ref *sref;
 251         struct btrfs_disk_key key;
 252         unsigned long end;
 253         unsigned long ptr;
 254         int type;
 255         u32 item_size = btrfs_item_size_nr(eb, slot);
 256         u64 flags;
 257         u64 offset;
 258
 259         if (item_size < sizeof(*ei)) {
 260 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 261                 struct btrfs_extent_item_v0 *ei0;
 262                 BUG_ON(item_size != sizeof(*ei0));
 263                 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
 264                 printf("\t\textent refs %u\n",
 265                        btrfs_extent_refs_v0(eb, ei0));
 266                 return;
 267 #else
 268                 BUG();
 269 #endif
 270         }
 271
 272         ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
 273         flags = btrfs_extent_flags(eb, ei);
 274
 275         printf("\t\textent refs %llu gen %llu flags %llu\n",
 276                (unsigned long long)btrfs_extent_refs(eb, ei),
 277                (unsigned long long)btrfs_extent_generation(eb, ei),
 278                (unsigned long long)flags);
 279
 280         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK && !metadata) {
 281                 struct btrfs_tree_block_info *info;
 282                 info = (struct btrfs_tree_block_info *)(ei + 1);
 283                 btrfs_tree_block_key(eb, info, &key);
 284                 printf("\t\ttree block ");
 285                 btrfs_print_key(&key);
 286                 printf(" level %d\n", btrfs_tree_block_level(eb, info));
 287                 iref = (struct btrfs_extent_inline_ref *)(info + 1);
 288         } else if (metadata) {
 289                 struct btrfs_key tmp;
 290
 291                 btrfs_item_key_to_cpu(eb, &tmp, slot);
 292                 printf("\t\ttree block skinny level %d\n", (int)tmp.offset);
 293                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 294         } else{
 295                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 296         }
 297
 298         ptr = (unsigned long)iref;
 299         end = (unsigned long)ei + item_size;
 300         while (ptr < end) {
 301                 iref = (struct btrfs_extent_inline_ref *)ptr;
 302                 type = btrfs_extent_inline_ref_type(eb, iref);
 303                 offset = btrfs_extent_inline_ref_offset(eb, iref);
 304                 switch (type) {
 305                 case BTRFS_TREE_BLOCK_REF_KEY:
 306                         printf("\t\ttree block backref root %llu\n",
 307                                (unsigned long long)offset);
 308                         break;
 309                 case BTRFS_SHARED_BLOCK_REF_KEY:
 310                         printf("\t\tshared block backref parent %llu\n",
 311                                (unsigned long long)offset);
 312                         break;
 313                 case BTRFS_EXTENT_DATA_REF_KEY:
 314                         dref = (struct btrfs_extent_data_ref *)(&iref->offset);
 315                         printf("\t\textent data backref root %llu "
 316                                "objectid %llu offset %llu count %u\n",
 317                                (unsigned long long)btrfs_extent_data_ref_root(eb, dref),
 318                                (unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
 319                                (unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
 320                                btrfs_extent_data_ref_count(eb, dref));
 321                         break;
 322                 case BTRFS_SHARED_DATA_REF_KEY:
 323                         sref = (struct btrfs_shared_data_ref *)(iref + 1);
 324                         printf("\t\tshared data backref parent %llu count %u\n",
 325                                (unsigned long long)offset,
 326                                btrfs_shared_data_ref_count(eb, sref));
 327                         break;
 328                 default:
 329                         return;
 330                 }
 331                 ptr += btrfs_extent_inline_ref_size(type);
 332         }
 333         WARN_ON(ptr > end);
 334 }
 335
 336 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 337 static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
 338 {
 339         struct btrfs_extent_ref_v0 *ref0;
 340
 341         ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
 342         printf("\t\textent back ref root %llu gen %llu "
 343                 "owner %llu num_refs %lu\n",
 344                 (unsigned long long)btrfs_ref_root_v0(eb, ref0),
 345                 (unsigned long long)btrfs_ref_generation_v0(eb, ref0),
 346                 (unsigned long long)btrfs_ref_objectid_v0(eb, ref0),
 347                 (unsigned long)btrfs_ref_count_v0(eb, ref0));
 348 }
 349 #endif
 350
 351 static void print_root_ref(struct extent_buffer *leaf, int slot, char *tag)
 352 {
 353         struct btrfs_root_ref *ref;
 354         char namebuf[BTRFS_NAME_LEN];
 355         int namelen;
 356
 357         ref = btrfs_item_ptr(leaf, slot, struct btrfs_root_ref);
 358         namelen = btrfs_root_ref_name_len(leaf, ref);
 359         read_extent_buffer(leaf, namebuf, (unsigned long)(ref + 1), namelen);
 360         printf("\t\troot %s key dirid %llu sequence %llu name %.*s\n", tag,
 361                (unsigned long long)btrfs_root_ref_dirid(leaf, ref),
 362                (unsigned long long)btrfs_root_ref_sequence(leaf, ref),
 363                namelen, namebuf);
 364 }
 365
 366 static int count_bytes(void *buf, int len, char b)
 367 {
 368         int cnt = 0;
 369         int i;
 370         for (i = 0; i < len; i++) {
 371                 if (((char*)buf)[i] == b)
 372                         cnt++;
 373         }
 374         return cnt;
 375 }
 376
 377 static void print_root(struct extent_buffer *leaf, int slot)
 378 {
 379         struct btrfs_root_item *ri;
 380         struct btrfs_root_item root_item;
 381         int len;
 382         char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
 383
 384         ri = btrfs_item_ptr(leaf, slot, struct btrfs_root_item);
 385         len = btrfs_item_size_nr(leaf, slot);
 386
 387         memset(&root_item, 0, sizeof(root_item));
 388         read_extent_buffer(leaf, &root_item, (unsigned long)ri, len);
 389
 390         printf("\t\troot data bytenr %llu level %d dirid %llu refs %u gen %llu\n",
 391                 (unsigned long long)btrfs_root_bytenr(&root_item),
 392                 btrfs_root_level(&root_item),
 393                 (unsigned long long)btrfs_root_dirid(&root_item),
 394                 btrfs_root_refs(&root_item),
 395                 (unsigned long long)btrfs_root_generation(&root_item));
 396
 397         if (root_item.generation == root_item.generation_v2) {
 398                 uuid_unparse(root_item.uuid, uuid_str);
 399                 printf("\t\tuuid %s\n", uuid_str);
 400                 if (count_bytes(root_item.parent_uuid, BTRFS_UUID_SIZE, 0) != BTRFS_UUID_SIZE) {
 401                         uuid_unparse(root_item.parent_uuid, uuid_str);
 402                         printf("\t\tparent_uuid %s\n", uuid_str);
 403                 }
 404                 if (count_bytes(root_item.received_uuid, BTRFS_UUID_SIZE, 0) != BTRFS_UUID_SIZE) {
 405                         uuid_unparse(root_item.received_uuid, uuid_str);
 406                         printf("\t\treceived_uuid %s\n", uuid_str);
 407                 }
 408                 if (root_item.ctransid) {
 409                         printf("\t\tctransid %llu otransid %llu stransid %llu rtransid %llu\n",
 410                                 btrfs_root_ctransid(&root_item),
 411                                 btrfs_root_otransid(&root_item),
 412                                 btrfs_root_stransid(&root_item),
 413                                 btrfs_root_rtransid(&root_item));
 414                 }
 415         }
 416         if (btrfs_root_refs(&root_item) == 0) {
 417                 struct btrfs_key drop_key;
 418                 btrfs_disk_key_to_cpu(&drop_key,
 419                                       &root_item.drop_progress);
 420                 printf("\t\tdrop ");
 421                 btrfs_print_key(&root_item.drop_progress);
 422                 printf(" level %d\n", root_item.drop_level);
 423         }
 424 }
 425
 426 static void print_free_space_header(struct extent_buffer *leaf, int slot)
 427 {
 428         struct btrfs_free_space_header *header;
 429         struct btrfs_disk_key location;
 430
 431         header = btrfs_item_ptr(leaf, slot, struct btrfs_free_space_header);
 432         btrfs_free_space_key(leaf, header, &location);
 433         printf("\t\tlocation ");
 434         btrfs_print_key(&location);
 435         printf("\n");
 436         printf("\t\tcache generation %llu entries %llu bitmaps %llu\n",
 437                (unsigned long long)btrfs_free_space_generation(leaf, header),
 438                (unsigned long long)btrfs_free_space_entries(leaf, header),
 439                (unsigned long long)btrfs_free_space_bitmaps(leaf, header));
 440 }
 441
 442 static void print_key_type(u64 objectid, u8 type)
 443 {
 444         if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID) {
 445                 printf("UNTYPED");
 446                 return;
 447         }
 448
 449         switch (type) {
 450         case BTRFS_INODE_ITEM_KEY:
 451                 printf("INODE_ITEM");
 452                 break;
 453         case BTRFS_INODE_REF_KEY:
 454                 printf("INODE_REF");
 455                 break;
 456         case BTRFS_INODE_EXTREF_KEY:
 457                 printf("INODE_EXTREF");
 458                 break;
 459         case BTRFS_DIR_ITEM_KEY:
 460                 printf("DIR_ITEM");
 461                 break;
 462         case BTRFS_DIR_INDEX_KEY:
 463                 printf("DIR_INDEX");
 464                 break;
 465         case BTRFS_DIR_LOG_ITEM_KEY:
 466                 printf("DIR_LOG_ITEM");
 467                 break;
 468         case BTRFS_DIR_LOG_INDEX_KEY:
 469                 printf("DIR_LOG_INDEX");
 470                 break;
 471         case BTRFS_XATTR_ITEM_KEY:
 472                 printf("XATTR_ITEM");
 473                 break;
 474         case BTRFS_ORPHAN_ITEM_KEY:
 475                 printf("ORPHAN_ITEM");
 476                 break;
 477         case BTRFS_ROOT_ITEM_KEY:
 478                 printf("ROOT_ITEM");
 479                 break;
 480         case BTRFS_ROOT_REF_KEY:
 481                 printf("ROOT_REF");
 482                 break;
 483         case BTRFS_ROOT_BACKREF_KEY:
 484                 printf("ROOT_BACKREF");
 485                 break;
 486         case BTRFS_EXTENT_ITEM_KEY:
 487                 printf("EXTENT_ITEM");
 488                 break;
 489         case BTRFS_METADATA_ITEM_KEY:
 490                 printf("METADATA_ITEM");
 491                 break;
 492         case BTRFS_TREE_BLOCK_REF_KEY:
 493                 printf("TREE_BLOCK_REF");
 494                 break;
 495         case BTRFS_SHARED_BLOCK_REF_KEY:
 496                 printf("SHARED_BLOCK_REF");
 497                 break;
 498         case BTRFS_EXTENT_DATA_REF_KEY:
 499                 printf("EXTENT_DATA_REF");
 500                 break;
 501         case BTRFS_SHARED_DATA_REF_KEY:
 502                 printf("SHARED_DATA_REF");
 503                 break;
 504         case BTRFS_EXTENT_REF_V0_KEY:
 505                 printf("EXTENT_REF_V0");
 506                 break;
 507         case BTRFS_CSUM_ITEM_KEY:
 508                 printf("CSUM_ITEM");
 509                 break;
 510         case BTRFS_EXTENT_CSUM_KEY:
 511                 printf("EXTENT_CSUM");
 512                 break;
 513         case BTRFS_EXTENT_DATA_KEY:
 514                 printf("EXTENT_DATA");
 515                 break;
 516         case BTRFS_BLOCK_GROUP_ITEM_KEY:
 517                 printf("BLOCK_GROUP_ITEM");
 518                 break;
 519         case BTRFS_CHUNK_ITEM_KEY:
 520                 printf("CHUNK_ITEM");
 521                 break;
 522         case BTRFS_DEV_ITEM_KEY:
 523                 printf("DEV_ITEM");
 524                 break;
 525         case BTRFS_DEV_EXTENT_KEY:
 526                 printf("DEV_EXTENT");
 527                 break;
 528         case BTRFS_BALANCE_ITEM_KEY:
 529                 printf("BALANCE_ITEM");
 530                 break;
 531         case BTRFS_DEV_REPLACE_KEY:
 532                 printf("DEV_REPLACE_ITEM");
 533                 break;
 534         case BTRFS_STRING_ITEM_KEY:
 535                 printf("STRING_ITEM");
 536                 break;
 537         case BTRFS_QGROUP_STATUS_KEY:
 538                 printf("BTRFS_STATUS_KEY");
 539                 break;
 540         case BTRFS_QGROUP_RELATION_KEY:
 541                 printf("BTRFS_QGROUP_RELATION_KEY");
 542                 break;
 543         case BTRFS_QGROUP_INFO_KEY:
 544                 printf("BTRFS_QGROUP_INFO_KEY");
 545                 break;
 546         case BTRFS_QGROUP_LIMIT_KEY:
 547                 printf("BTRFS_QGROUP_LIMIT_KEY");
 548                 break;
 549         case BTRFS_DEV_STATS_KEY:
 550                 printf("DEV_STATS_ITEM");
 551                 break;
 552         case BTRFS_UUID_KEY_SUBVOL:
 553                 printf("BTRFS_UUID_KEY_SUBVOL");
 554                 break;
 555         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 556                 printf("BTRFS_UUID_KEY_RECEIVED_SUBVOL");
 557                 break;
 558         default:
 559                 printf("UNKNOWN.%d", type);
 560         };
 561 }
 562
 563 static void print_objectid(u64 objectid, u8 type)
 564 {
 565         switch (type) {
 566         case BTRFS_DEV_EXTENT_KEY:
 567                 printf("%llu", (unsigned long long)objectid); /* device id */
 568                 return;
 569         case BTRFS_QGROUP_RELATION_KEY:
 570                 printf("%llu/%llu", objectid >> 48,
 571                         objectid & ((1ll << 48) - 1));
 572                 return;
 573         case BTRFS_UUID_KEY_SUBVOL:
 574         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 575                 printf("0x%016llx", (unsigned long long)objectid);
 576                 return;
 577         }
 578
 579         switch (objectid) {
 580         case BTRFS_ROOT_TREE_OBJECTID:
 581                 if (type == BTRFS_DEV_ITEM_KEY)
 582                         printf("DEV_ITEMS");
 583                 else
 584                         printf("ROOT_TREE");
 585                 break;
 586         case BTRFS_EXTENT_TREE_OBJECTID:
 587                 printf("EXTENT_TREE");
 588                 break;
 589         case BTRFS_CHUNK_TREE_OBJECTID:
 590                 printf("CHUNK_TREE");
 591                 break;
 592         case BTRFS_DEV_TREE_OBJECTID:
 593                 printf("DEV_TREE");
 594                 break;
 595         case BTRFS_FS_TREE_OBJECTID:
 596                 printf("FS_TREE");
 597                 break;
 598         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 599                 printf("ROOT_TREE_DIR");
 600                 break;
 601         case BTRFS_CSUM_TREE_OBJECTID:
 602                 printf("CSUM_TREE");
 603                 break;
 604         case BTRFS_BALANCE_OBJECTID:
 605                 printf("BALANCE");
 606                 break;
 607         case BTRFS_ORPHAN_OBJECTID:
 608                 printf("ORPHAN");
 609                 break;
 610         case BTRFS_TREE_LOG_OBJECTID:
 611                 printf("TREE_LOG");
 612                 break;
 613         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 614                 printf("LOG_FIXUP");
 615                 break;
 616         case BTRFS_TREE_RELOC_OBJECTID:
 617                 printf("TREE_RELOC");
 618                 break;
 619         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 620                 printf("DATA_RELOC_TREE");
 621                 break;
 622         case BTRFS_EXTENT_CSUM_OBJECTID:
 623                 printf("EXTENT_CSUM");
 624                 break;
 625         case BTRFS_FREE_SPACE_OBJECTID:
 626                 printf("FREE_SPACE");
 627                 break;
 628         case BTRFS_FREE_INO_OBJECTID:
 629                 printf("FREE_INO");
 630                 break;
 631         case BTRFS_QUOTA_TREE_OBJECTID:
 632                 printf("QUOTA_TREE");
 633                 break;
 634         case BTRFS_UUID_TREE_OBJECTID:
 635                 printf("UUID_TREE");
 636                 break;
 637         case BTRFS_MULTIPLE_OBJECTIDS:
 638                 printf("MULTIPLE");
 639                 break;
 640         case (u64)-1:
 641                 printf("-1");
 642                 break;
 643         case BTRFS_FIRST_CHUNK_TREE_OBJECTID:
 644                 if (type == BTRFS_CHUNK_ITEM_KEY) {
 645                         printf("FIRST_CHUNK_TREE");
 646                         break;
 647                 }
 648                 /* fall-thru */
 649         default:
 650                 printf("%llu", (unsigned long long)objectid);
 651         }
 652 }
 653
 654 void btrfs_print_key(struct btrfs_disk_key *disk_key)
 655 {
 656         u64 objectid = btrfs_disk_key_objectid(disk_key);
 657         u8 type = btrfs_disk_key_type(disk_key);
 658         u64 offset = btrfs_disk_key_offset(disk_key);
 659
 660         printf("key (");
 661         print_objectid(objectid, type);
 662         printf(" ");
 663         print_key_type(objectid, type);
 664         switch (type) {
 665         case BTRFS_QGROUP_RELATION_KEY:
 666         case BTRFS_QGROUP_INFO_KEY:
 667         case BTRFS_QGROUP_LIMIT_KEY:
 668                 printf(" %llu/%llu)", (unsigned long long)(offset >> 48),
 669                         (unsigned long long)(offset & ((1ll << 48) - 1)));
 670                 break;
 671         case BTRFS_UUID_KEY_SUBVOL:
 672         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 673                 printf(" 0x%016llx)", (unsigned long long)offset);
 674                 break;
 675         default:
 676                 if (offset == (u64)-1)
 677                         printf(" -1)");
 678                 else
 679                         printf(" %llu)", (unsigned long long)offset);
 680                 break;
 681         }
 682 }
 683
 684 static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
 685                             u32 item_size)
 686 {
 687         if (item_size & (sizeof(u64) - 1)) {
 688                 printf("btrfs: uuid item with illegal size %lu!\n",
 689                        (unsigned long)item_size);
 690                 return;
 691         }
 692         while (item_size) {
 693                 __le64 subvol_id;
 694
 695                 read_extent_buffer(l, &subvol_id, offset, sizeof(u64));
 696                 printf("\t\tsubvol_id %llu\n",
 697                         (unsigned long long)le64_to_cpu(subvol_id));
 698                 item_size -= sizeof(u64);
 699                 offset += sizeof(u64);
 700         }
 701 }
 702
 703 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 704 {
 705         int i;
 706         char *str;
 707         struct btrfs_item *item;
 708         struct btrfs_dir_item *di;
 709         struct btrfs_inode_item *ii;
 710         struct btrfs_file_extent_item *fi;
 711         struct btrfs_block_group_item *bi;
 712         struct btrfs_extent_data_ref *dref;
 713         struct btrfs_shared_data_ref *sref;
 714         struct btrfs_inode_ref *iref;
 715         struct btrfs_inode_extref *iref2;
 716         struct btrfs_dev_extent *dev_extent;
 717         struct btrfs_disk_key disk_key;
 718         struct btrfs_block_group_item bg_item;
 719         struct btrfs_dir_log_item *dlog;
 720         struct btrfs_qgroup_info_item *qg_info;
 721         struct btrfs_qgroup_limit_item *qg_limit;
 722         struct btrfs_qgroup_status_item *qg_status;
 723         u32 nr = btrfs_header_nritems(l);
 724         u64 objectid;
 725         u32 type;
 726
 727         printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
 728                 (unsigned long long)btrfs_header_bytenr(l), nr,
 729                 btrfs_leaf_free_space(root, l),
 730                 (unsigned long long)btrfs_header_generation(l),
 731                 (unsigned long long)btrfs_header_owner(l));
 732         print_uuids(l);
 733         fflush(stdout);
 734         for (i = 0 ; i < nr ; i++) {
 735                 item = btrfs_item_nr(i);
 736                 btrfs_item_key(l, &disk_key, i);
 737                 objectid = btrfs_disk_key_objectid(&disk_key);
 738                 type = btrfs_disk_key_type(&disk_key);
 739                 printf("\titem %d ", i);
 740                 btrfs_print_key(&disk_key);
 741                 printf(" itemoff %d itemsize %d\n",
 742                         btrfs_item_offset(l, item),
 743                         btrfs_item_size(l, item));
 744
 745                 if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID)
 746                         print_free_space_header(l, i);
 747
 748                 switch (type) {
 749                 case BTRFS_INODE_ITEM_KEY:
 750                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
 751                         printf("\t\tinode generation %llu transid %llu size %llu block group %llu mode %o links %u\n",
 752                                (unsigned long long)btrfs_inode_generation(l, ii),
 753                                (unsigned long long)btrfs_inode_transid(l, ii),
 754                                (unsigned long long)btrfs_inode_size(l, ii),
 755                                (unsigned long long)btrfs_inode_block_group(l,ii),
 756                                btrfs_inode_mode(l, ii),
 757                                btrfs_inode_nlink(l, ii));
 758                         break;
 759                 case BTRFS_INODE_REF_KEY:
 760                         iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
 761                         print_inode_ref_item(l, item, iref);
 762                         break;
 763                 case BTRFS_INODE_EXTREF_KEY:
 764                         iref2 = btrfs_item_ptr(l, i, struct btrfs_inode_extref);
 765                         print_inode_extref_item(l, item, iref2);
 766                         break;
 767                 case BTRFS_DIR_ITEM_KEY:
 768                 case BTRFS_DIR_INDEX_KEY:
 769                 case BTRFS_XATTR_ITEM_KEY:
 770                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 771                         print_dir_item(l, item, di);
 772                         break;
 773                 case BTRFS_DIR_LOG_INDEX_KEY:
 774                 case BTRFS_DIR_LOG_ITEM_KEY:
 775                         dlog = btrfs_item_ptr(l, i, struct btrfs_dir_log_item);
 776                         printf("\t\tdir log end %Lu\n",
 777                                (unsigned long long)btrfs_dir_log_end(l, dlog));
 778                        break;
 779                 case BTRFS_ORPHAN_ITEM_KEY:
 780                         printf("\t\torphan item\n");
 781                         break;
 782                 case BTRFS_ROOT_ITEM_KEY:
 783                         print_root(l, i);
 784                         break;
 785                 case BTRFS_ROOT_REF_KEY:
 786                         print_root_ref(l, i, "ref");
 787                         break;
 788                 case BTRFS_ROOT_BACKREF_KEY:
 789                         print_root_ref(l, i, "backref");
 790                         break;
 791                 case BTRFS_EXTENT_ITEM_KEY:
 792                         print_extent_item(l, i, 0);
 793                         break;
 794                 case BTRFS_METADATA_ITEM_KEY:
 795                         print_extent_item(l, i, 1);
 796                         break;
 797                 case BTRFS_TREE_BLOCK_REF_KEY:
 798                         printf("\t\ttree block backref\n");
 799                         break;
 800                 case BTRFS_SHARED_BLOCK_REF_KEY:
 801                         printf("\t\tshared block backref\n");
 802                         break;
 803                 case BTRFS_EXTENT_DATA_REF_KEY:
 804                         dref = btrfs_item_ptr(l, i, struct btrfs_extent_data_ref);
 805                         printf("\t\textent data backref root %llu "
 806                                "objectid %llu offset %llu count %u\n",
 807                                (unsigned long long)btrfs_extent_data_ref_root(l, dref),
 808                                (unsigned long long)btrfs_extent_data_ref_objectid(l, dref),
 809                                (unsigned long long)btrfs_extent_data_ref_offset(l, dref),
 810                                btrfs_extent_data_ref_count(l, dref));
 811                         break;
 812                 case BTRFS_SHARED_DATA_REF_KEY:
 813                         sref = btrfs_item_ptr(l, i, struct btrfs_shared_data_ref);
 814                         printf("\t\tshared data backref count %u\n",
 815                                btrfs_shared_data_ref_count(l, sref));
 816                         break;
 817                 case BTRFS_EXTENT_REF_V0_KEY:
 818 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 819                         print_extent_ref_v0(l, i);
 820 #else
 821                         BUG();
 822 #endif
 823                         break;
 824                 case BTRFS_CSUM_ITEM_KEY:
 825                         printf("\t\tcsum item\n");
 826                         break;
 827                 case BTRFS_EXTENT_CSUM_KEY:
 828                         printf("\t\textent csum item\n");
 829                         break;
 830                 case BTRFS_EXTENT_DATA_KEY:
 831                         fi = btrfs_item_ptr(l, i,
 832                                             struct btrfs_file_extent_item);
 833                         print_file_extent_item(l, item, i, fi);
 834                         break;
 835                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 836                         bi = btrfs_item_ptr(l, i,
 837                                             struct btrfs_block_group_item);
 838                         read_extent_buffer(l, &bg_item, (unsigned long)bi,
 839                                            sizeof(bg_item));
 840                         printf("\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
 841                                (unsigned long long)btrfs_block_group_used(&bg_item),
 842                                (unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
 843                                (unsigned long long)btrfs_block_group_flags(&bg_item));
 844                         break;
 845                 case BTRFS_CHUNK_ITEM_KEY:
 846                         print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
 847                         break;
 848                 case BTRFS_DEV_ITEM_KEY:
 849                         print_dev_item(l, btrfs_item_ptr(l, i,
 850                                         struct btrfs_dev_item));
 851                         break;
 852                 case BTRFS_DEV_EXTENT_KEY:
 853                         dev_extent = btrfs_item_ptr(l, i,
 854                                                     struct btrfs_dev_extent);
 855                         printf("\t\tdev extent chunk_tree %llu\n"
 856                                "\t\tchunk objectid %llu chunk offset %llu "
 857                                "length %llu\n",
 858                                (unsigned long long)
 859                                btrfs_dev_extent_chunk_tree(l, dev_extent),
 860                                (unsigned long long)
 861                                btrfs_dev_extent_chunk_objectid(l, dev_extent),
 862                                (unsigned long long)
 863                                btrfs_dev_extent_chunk_offset(l, dev_extent),
 864                                (unsigned long long)
 865                                btrfs_dev_extent_length(l, dev_extent));
 866                         break;
 867                 case BTRFS_QGROUP_STATUS_KEY:
 868                         qg_status = btrfs_item_ptr(l, i,
 869                                         struct btrfs_qgroup_status_item);
 870                         printf("\t\tversion %llu generation %llu flags %#llx "
 871                                 "scan %lld\n",
 872                                 (unsigned long long)
 873                                 btrfs_qgroup_status_version(l, qg_status),
 874                                 (unsigned long long)
 875                                 btrfs_qgroup_status_generation(l, qg_status),
 876                                 (unsigned long long)
 877                                 btrfs_qgroup_status_flags(l, qg_status),
 878                                 (unsigned long long)
 879                                 btrfs_qgroup_status_scan(l, qg_status));
 880                         break;
 881                 case BTRFS_QGROUP_RELATION_KEY:
 882                         break;
 883                 case BTRFS_QGROUP_INFO_KEY:
 884                         qg_info = btrfs_item_ptr(l, i,
 885                                                  struct btrfs_qgroup_info_item);
 886                         printf("\t\tgeneration %llu\n"
 887                              "\t\treferenced %lld referenced compressed %lld\n"
 888                              "\t\texclusive %lld exclusive compressed %lld\n",
 889                                (unsigned long long)
 890                                btrfs_qgroup_info_generation(l, qg_info),
 891                                (long long)
 892                                btrfs_qgroup_info_referenced(l, qg_info),
 893                                (long long)
 894                                btrfs_qgroup_info_referenced_compressed(l,
 895                                                                        qg_info),
 896                                (long long)
 897                                btrfs_qgroup_info_exclusive(l, qg_info),
 898                                (long long)
 899                                btrfs_qgroup_info_exclusive_compressed(l,
 900                                                                       qg_info));
 901                         break;
 902                 case BTRFS_QGROUP_LIMIT_KEY:
 903                         qg_limit = btrfs_item_ptr(l, i,
 904                                          struct btrfs_qgroup_limit_item);
 905                         printf("\t\tflags %llx\n"
 906                              "\t\tmax referenced %lld max exclusive %lld\n"
 907                              "\t\trsv referenced %lld rsv exclusive %lld\n",
 908                                (unsigned long long)
 909                                btrfs_qgroup_limit_flags(l, qg_limit),
 910                                (long long)
 911                                btrfs_qgroup_limit_max_referenced(l, qg_limit),
 912                                (long long)
 913                                btrfs_qgroup_limit_max_exclusive(l, qg_limit),
 914                                (long long)
 915                                btrfs_qgroup_limit_rsv_referenced(l, qg_limit),
 916                                (long long)
 917                                btrfs_qgroup_limit_rsv_exclusive(l, qg_limit));
 918                         break;
 919                 case BTRFS_UUID_KEY_SUBVOL:
 920                 case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 921                         print_uuid_item(l, btrfs_item_ptr_offset(l, i),
 922                                         btrfs_item_size_nr(l, i));
 923                         break;
 924                 case BTRFS_STRING_ITEM_KEY:
 925                         /* dirty, but it's simple */
 926                         str = l->data + btrfs_item_ptr_offset(l, i);
 927                         printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
 928                         break;
 929                 case BTRFS_DEV_STATS_KEY:
 930                         printf("\t\tdevice stats\n");
 931                         break;
 932                 };
 933                 fflush(stdout);
 934         }
 935 }
 936
 937 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb, int follow)
 938 {
 939         int i;
 940         u32 nr;
 941         u32 size;
 942         struct btrfs_disk_key disk_key;
 943         struct btrfs_key key;
 944
 945         if (!eb)
 946                 return;
 947         nr = btrfs_header_nritems(eb);
 948         if (btrfs_is_leaf(eb)) {
 949                 btrfs_print_leaf(root, eb);
 950                 return;
 951         }
 952         printf("node %llu level %d items %d free %u generation %llu owner %llu\n",
 953                (unsigned long long)eb->start,
 954                 btrfs_header_level(eb), nr,
 955                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
 956                 (unsigned long long)btrfs_header_generation(eb),
 957                 (unsigned long long)btrfs_header_owner(eb));
 958         print_uuids(eb);
 959         fflush(stdout);
 960         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
 961         for (i = 0; i < nr; i++) {
 962                 u64 blocknr = btrfs_node_blockptr(eb, i);
 963                 btrfs_node_key(eb, &disk_key, i);
 964                 btrfs_disk_key_to_cpu(&key, &disk_key);
 965                 printf("\t");
 966                 btrfs_print_key(&disk_key);
 967                 printf(" block %llu (%llu) gen %llu\n",
 968                        (unsigned long long)blocknr,
 969                        (unsigned long long)blocknr / size,
 970                        (unsigned long long)btrfs_node_ptr_generation(eb, i));
 971                 fflush(stdout);
 972         }
 973         if (!follow)
 974                 return;
 975
 976         for (i = 0; i < nr; i++) {
 977                 struct extent_buffer *next = read_tree_block(root,
 978                                              btrfs_node_blockptr(eb, i),
 979                                              size,
 980                                              btrfs_node_ptr_generation(eb, i));
 981                 if (!next) {
 982                         fprintf(stderr, "failed to read %llu in tree %llu\n",
 983                                 (unsigned long long)btrfs_node_blockptr(eb, i),
 984                                 (unsigned long long)btrfs_header_owner(eb));
 985                         continue;
 986                 }
 987                 if (btrfs_is_leaf(next) &&
 988                     btrfs_header_level(eb) != 1)
 989                         BUG();
 990                 if (btrfs_header_level(next) !=
 991                         btrfs_header_level(eb) - 1)
 992                         BUG();
 993                 btrfs_print_tree(root, next, 1);
 994                 free_extent_buffer(next);
 995         }
 996 }