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                            (unsigned long)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                                    struct btrfs_file_extent_item *fi)
 213 {
 214         int extent_type = btrfs_file_extent_type(eb, fi);
 215
 216         if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 217                 printf("\t\tinline extent data size %u "
 218                        "ram %u compress %d\n",
 219                   btrfs_file_extent_inline_item_len(eb, item),
 220                   btrfs_file_extent_inline_len(eb, fi),
 221                   btrfs_file_extent_compression(eb, fi));
 222                 return;
 223         }
 224         if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
 225                 printf("\t\tprealloc data disk byte %llu nr %llu\n",
 226                   (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 227                   (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 228                 printf("\t\tprealloc data offset %llu nr %llu\n",
 229                   (unsigned long long)btrfs_file_extent_offset(eb, fi),
 230                   (unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
 231                 return;
 232         }
 233         printf("\t\textent data disk byte %llu nr %llu\n",
 234                 (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 235                 (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 236         printf("\t\textent data offset %llu nr %llu ram %llu\n",
 237                 (unsigned long long)btrfs_file_extent_offset(eb, fi),
 238                 (unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
 239                 (unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
 240         printf("\t\textent compression %d\n",
 241                btrfs_file_extent_compression(eb, fi));
 242 }
 243
 244 static void print_extent_item(struct extent_buffer *eb, int slot, int metadata)
 245 {
 246         struct btrfs_extent_item *ei;
 247         struct btrfs_extent_inline_ref *iref;
 248         struct btrfs_extent_data_ref *dref;
 249         struct btrfs_shared_data_ref *sref;
 250         struct btrfs_disk_key key;
 251         unsigned long end;
 252         unsigned long ptr;
 253         int type;
 254         u32 item_size = btrfs_item_size_nr(eb, slot);
 255         u64 flags;
 256         u64 offset;
 257
 258         if (item_size < sizeof(*ei)) {
 259 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 260                 struct btrfs_extent_item_v0 *ei0;
 261                 BUG_ON(item_size != sizeof(*ei0));
 262                 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
 263                 printf("\t\textent refs %u\n",
 264                        btrfs_extent_refs_v0(eb, ei0));
 265                 return;
 266 #else
 267                 BUG();
 268 #endif
 269         }
 270
 271         ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
 272         flags = btrfs_extent_flags(eb, ei);
 273
 274         printf("\t\textent refs %llu gen %llu flags %llu\n",
 275                (unsigned long long)btrfs_extent_refs(eb, ei),
 276                (unsigned long long)btrfs_extent_generation(eb, ei),
 277                (unsigned long long)flags);
 278
 279         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK && !metadata) {
 280                 struct btrfs_tree_block_info *info;
 281                 info = (struct btrfs_tree_block_info *)(ei + 1);
 282                 btrfs_tree_block_key(eb, info, &key);
 283                 printf("\t\ttree block ");
 284                 btrfs_print_key(&key);
 285                 printf(" level %d\n", btrfs_tree_block_level(eb, info));
 286                 iref = (struct btrfs_extent_inline_ref *)(info + 1);
 287         } else if (metadata) {
 288                 struct btrfs_key tmp;
 289
 290                 btrfs_item_key_to_cpu(eb, &tmp, slot);
 291                 printf("\t\ttree block skinny level %d\n", (int)tmp.offset);
 292                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 293         } else{
 294                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 295         }
 296
 297         ptr = (unsigned long)iref;
 298         end = (unsigned long)ei + item_size;
 299         while (ptr < end) {
 300                 iref = (struct btrfs_extent_inline_ref *)ptr;
 301                 type = btrfs_extent_inline_ref_type(eb, iref);
 302                 offset = btrfs_extent_inline_ref_offset(eb, iref);
 303                 switch (type) {
 304                 case BTRFS_TREE_BLOCK_REF_KEY:
 305                         printf("\t\ttree block backref root %llu\n",
 306                                (unsigned long long)offset);
 307                         break;
 308                 case BTRFS_SHARED_BLOCK_REF_KEY:
 309                         printf("\t\tshared block backref parent %llu\n",
 310                                (unsigned long long)offset);
 311                         break;
 312                 case BTRFS_EXTENT_DATA_REF_KEY:
 313                         dref = (struct btrfs_extent_data_ref *)(&iref->offset);
 314                         printf("\t\textent data backref root %llu "
 315                                "objectid %llu offset %llu count %u\n",
 316                                (unsigned long long)btrfs_extent_data_ref_root(eb, dref),
 317                                (unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
 318                                (unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
 319                                btrfs_extent_data_ref_count(eb, dref));
 320                         break;
 321                 case BTRFS_SHARED_DATA_REF_KEY:
 322                         sref = (struct btrfs_shared_data_ref *)(iref + 1);
 323                         printf("\t\tshared data backref parent %llu count %u\n",
 324                                (unsigned long long)offset,
 325                                btrfs_shared_data_ref_count(eb, sref));
 326                         break;
 327                 default:
 328                         return;
 329                 }
 330                 ptr += btrfs_extent_inline_ref_size(type);
 331         }
 332         WARN_ON(ptr > end);
 333 }
 334
 335 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 336 static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
 337 {
 338         struct btrfs_extent_ref_v0 *ref0;
 339
 340         ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
 341         printf("\t\textent back ref root %llu gen %llu "
 342                 "owner %llu num_refs %lu\n",
 343                 (unsigned long long)btrfs_ref_root_v0(eb, ref0),
 344                 (unsigned long long)btrfs_ref_generation_v0(eb, ref0),
 345                 (unsigned long long)btrfs_ref_objectid_v0(eb, ref0),
 346                 (unsigned long)btrfs_ref_count_v0(eb, ref0));
 347 }
 348 #endif
 349
 350 static void print_root_ref(struct extent_buffer *leaf, int slot, char *tag)
 351 {
 352         struct btrfs_root_ref *ref;
 353         char namebuf[BTRFS_NAME_LEN];
 354         int namelen;
 355
 356         ref = btrfs_item_ptr(leaf, slot, struct btrfs_root_ref);
 357         namelen = btrfs_root_ref_name_len(leaf, ref);
 358         read_extent_buffer(leaf, namebuf, (unsigned long)(ref + 1), namelen);
 359         printf("\t\troot %s key dirid %llu sequence %llu name %.*s\n", tag,
 360                (unsigned long long)btrfs_root_ref_dirid(leaf, ref),
 361                (unsigned long long)btrfs_root_ref_sequence(leaf, ref),
 362                namelen, namebuf);
 363 }
 364
 365 static int count_bytes(void *buf, int len, char b)
 366 {
 367         int cnt = 0;
 368         int i;
 369         for (i = 0; i < len; i++) {
 370                 if (((char*)buf)[i] == b)
 371                         cnt++;
 372         }
 373         return cnt;
 374 }
 375
 376 static void print_root(struct extent_buffer *leaf, int slot)
 377 {
 378         struct btrfs_root_item *ri;
 379         struct btrfs_root_item root_item;
 380         int len;
 381         char uuid_str[128];
 382
 383         ri = btrfs_item_ptr(leaf, slot, struct btrfs_root_item);
 384         len = btrfs_item_size_nr(leaf, slot);
 385
 386         memset(&root_item, 0, sizeof(root_item));
 387         read_extent_buffer(leaf, &root_item, (unsigned long)ri, len);
 388
 389         printf("\t\troot data bytenr %llu level %d dirid %llu refs %u gen %llu\n",
 390                 (unsigned long long)btrfs_root_bytenr(&root_item),
 391                 btrfs_root_level(&root_item),
 392                 (unsigned long long)btrfs_root_dirid(&root_item),
 393                 btrfs_root_refs(&root_item),
 394                 (unsigned long long)btrfs_root_generation(&root_item));
 395
 396         if (root_item.generation == root_item.generation_v2) {
 397                 uuid_unparse(root_item.uuid, uuid_str);
 398                 printf("\t\tuuid %s\n", uuid_str);
 399                 if (count_bytes(root_item.parent_uuid, BTRFS_UUID_SIZE, 0) != BTRFS_UUID_SIZE) {
 400                         uuid_unparse(root_item.parent_uuid, uuid_str);
 401                         printf("\t\tparent_uuid %s\n", uuid_str);
 402                 }
 403                 if (count_bytes(root_item.received_uuid, BTRFS_UUID_SIZE, 0) != BTRFS_UUID_SIZE) {
 404                         uuid_unparse(root_item.received_uuid, uuid_str);
 405                         printf("\t\treceived_uuid %s\n", uuid_str);
 406                 }
 407                 if (root_item.ctransid) {
 408                         printf("\t\tctransid %llu otransid %llu stransid %llu rtransid %llu\n",
 409                                 btrfs_root_ctransid(&root_item),
 410                                 btrfs_root_otransid(&root_item),
 411                                 btrfs_root_stransid(&root_item),
 412                                 btrfs_root_rtransid(&root_item));
 413                 }
 414         }
 415         if (btrfs_root_refs(&root_item) == 0) {
 416                 struct btrfs_key drop_key;
 417                 btrfs_disk_key_to_cpu(&drop_key,
 418                                       &root_item.drop_progress);
 419                 printf("\t\tdrop ");
 420                 btrfs_print_key(&root_item.drop_progress);
 421                 printf(" level %d\n", root_item.drop_level);
 422         }
 423 }
 424
 425 static void print_free_space_header(struct extent_buffer *leaf, int slot)
 426 {
 427         struct btrfs_free_space_header *header;
 428         struct btrfs_disk_key location;
 429
 430         header = btrfs_item_ptr(leaf, slot, struct btrfs_free_space_header);
 431         btrfs_free_space_key(leaf, header, &location);
 432         printf("\t\tlocation ");
 433         btrfs_print_key(&location);
 434         printf("\n");
 435         printf("\t\tcache generation %llu entries %llu bitmaps %llu\n",
 436                (unsigned long long)btrfs_free_space_generation(leaf, header),
 437                (unsigned long long)btrfs_free_space_entries(leaf, header),
 438                (unsigned long long)btrfs_free_space_bitmaps(leaf, header));
 439 }
 440
 441 static void print_key_type(u64 objectid, u8 type)
 442 {
 443         if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID) {
 444                 printf("UNTYPED");
 445                 return;
 446         }
 447
 448         switch (type) {
 449         case BTRFS_INODE_ITEM_KEY:
 450                 printf("INODE_ITEM");
 451                 break;
 452         case BTRFS_INODE_REF_KEY:
 453                 printf("INODE_REF");
 454                 break;
 455         case BTRFS_INODE_EXTREF_KEY:
 456                 printf("INODE_EXTREF");
 457                 break;
 458         case BTRFS_DIR_ITEM_KEY:
 459                 printf("DIR_ITEM");
 460                 break;
 461         case BTRFS_DIR_INDEX_KEY:
 462                 printf("DIR_INDEX");
 463                 break;
 464         case BTRFS_DIR_LOG_ITEM_KEY:
 465                 printf("DIR_LOG_ITEM");
 466                 break;
 467         case BTRFS_DIR_LOG_INDEX_KEY:
 468                 printf("DIR_LOG_INDEX");
 469                 break;
 470         case BTRFS_XATTR_ITEM_KEY:
 471                 printf("XATTR_ITEM");
 472                 break;
 473         case BTRFS_ORPHAN_ITEM_KEY:
 474                 printf("ORPHAN_ITEM");
 475                 break;
 476         case BTRFS_ROOT_ITEM_KEY:
 477                 printf("ROOT_ITEM");
 478                 break;
 479         case BTRFS_ROOT_REF_KEY:
 480                 printf("ROOT_REF");
 481                 break;
 482         case BTRFS_ROOT_BACKREF_KEY:
 483                 printf("ROOT_BACKREF");
 484                 break;
 485         case BTRFS_EXTENT_ITEM_KEY:
 486                 printf("EXTENT_ITEM");
 487                 break;
 488         case BTRFS_METADATA_ITEM_KEY:
 489                 printf("METADATA_ITEM");
 490                 break;
 491         case BTRFS_TREE_BLOCK_REF_KEY:
 492                 printf("TREE_BLOCK_REF");
 493                 break;
 494         case BTRFS_SHARED_BLOCK_REF_KEY:
 495                 printf("SHARED_BLOCK_REF");
 496                 break;
 497         case BTRFS_EXTENT_DATA_REF_KEY:
 498                 printf("EXTENT_DATA_REF");
 499                 break;
 500         case BTRFS_SHARED_DATA_REF_KEY:
 501                 printf("SHARED_DATA_REF");
 502                 break;
 503         case BTRFS_EXTENT_REF_V0_KEY:
 504                 printf("EXTENT_REF_V0");
 505                 break;
 506         case BTRFS_CSUM_ITEM_KEY:
 507                 printf("CSUM_ITEM");
 508                 break;
 509         case BTRFS_EXTENT_CSUM_KEY:
 510                 printf("EXTENT_CSUM");
 511                 break;
 512         case BTRFS_EXTENT_DATA_KEY:
 513                 printf("EXTENT_DATA");
 514                 break;
 515         case BTRFS_BLOCK_GROUP_ITEM_KEY:
 516                 printf("BLOCK_GROUP_ITEM");
 517                 break;
 518         case BTRFS_CHUNK_ITEM_KEY:
 519                 printf("CHUNK_ITEM");
 520                 break;
 521         case BTRFS_DEV_ITEM_KEY:
 522                 printf("DEV_ITEM");
 523                 break;
 524         case BTRFS_DEV_EXTENT_KEY:
 525                 printf("DEV_EXTENT");
 526                 break;
 527         case BTRFS_BALANCE_ITEM_KEY:
 528                 printf("BALANCE_ITEM");
 529                 break;
 530         case BTRFS_DEV_REPLACE_KEY:
 531                 printf("DEV_REPLACE_ITEM");
 532                 break;
 533         case BTRFS_STRING_ITEM_KEY:
 534                 printf("STRING_ITEM");
 535                 break;
 536         case BTRFS_QGROUP_STATUS_KEY:
 537                 printf("BTRFS_STATUS_KEY");
 538                 break;
 539         case BTRFS_QGROUP_RELATION_KEY:
 540                 printf("BTRFS_QGROUP_RELATION_KEY");
 541                 break;
 542         case BTRFS_QGROUP_INFO_KEY:
 543                 printf("BTRFS_QGROUP_INFO_KEY");
 544                 break;
 545         case BTRFS_QGROUP_LIMIT_KEY:
 546                 printf("BTRFS_QGROUP_LIMIT_KEY");
 547                 break;
 548         case BTRFS_DEV_STATS_KEY:
 549                 printf("DEV_STATS_ITEM");
 550                 break;
 551         case BTRFS_UUID_KEY_SUBVOL:
 552                 printf("BTRFS_UUID_KEY_SUBVOL");
 553                 break;
 554         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 555                 printf("BTRFS_UUID_KEY_RECEIVED_SUBVOL");
 556                 break;
 557         default:
 558                 printf("UNKNOWN.%d", type);
 559         };
 560 }
 561
 562 static void print_objectid(u64 objectid, u8 type)
 563 {
 564         switch (type) {
 565         case BTRFS_DEV_EXTENT_KEY:
 566                 printf("%llu", (unsigned long long)objectid); /* device id */
 567                 return;
 568         case BTRFS_QGROUP_RELATION_KEY:
 569                 printf("%llu/%llu", objectid >> 48,
 570                         objectid & ((1ll << 48) - 1));
 571                 return;
 572         case BTRFS_UUID_KEY_SUBVOL:
 573         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 574                 printf("0x%016llx", (unsigned long long)objectid);
 575                 return;
 576         }
 577
 578         switch (objectid) {
 579         case BTRFS_ROOT_TREE_OBJECTID:
 580                 if (type == BTRFS_DEV_ITEM_KEY)
 581                         printf("DEV_ITEMS");
 582                 else
 583                         printf("ROOT_TREE");
 584                 break;
 585         case BTRFS_EXTENT_TREE_OBJECTID:
 586                 printf("EXTENT_TREE");
 587                 break;
 588         case BTRFS_CHUNK_TREE_OBJECTID:
 589                 printf("CHUNK_TREE");
 590                 break;
 591         case BTRFS_DEV_TREE_OBJECTID:
 592                 printf("DEV_TREE");
 593                 break;
 594         case BTRFS_FS_TREE_OBJECTID:
 595                 printf("FS_TREE");
 596                 break;
 597         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 598                 printf("ROOT_TREE_DIR");
 599                 break;
 600         case BTRFS_CSUM_TREE_OBJECTID:
 601                 printf("CSUM_TREE");
 602                 break;
 603         case BTRFS_BALANCE_OBJECTID:
 604                 printf("BALANCE");
 605                 break;
 606         case BTRFS_ORPHAN_OBJECTID:
 607                 printf("ORPHAN");
 608                 break;
 609         case BTRFS_TREE_LOG_OBJECTID:
 610                 printf("TREE_LOG");
 611                 break;
 612         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 613                 printf("LOG_FIXUP");
 614                 break;
 615         case BTRFS_TREE_RELOC_OBJECTID:
 616                 printf("TREE_RELOC");
 617                 break;
 618         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 619                 printf("DATA_RELOC_TREE");
 620                 break;
 621         case BTRFS_EXTENT_CSUM_OBJECTID:
 622                 printf("EXTENT_CSUM");
 623                 break;
 624         case BTRFS_FREE_SPACE_OBJECTID:
 625                 printf("FREE_SPACE");
 626                 break;
 627         case BTRFS_FREE_INO_OBJECTID:
 628                 printf("FREE_INO");
 629                 break;
 630         case BTRFS_QUOTA_TREE_OBJECTID:
 631                 printf("QUOTA_TREE");
 632                 break;
 633         case BTRFS_UUID_TREE_OBJECTID:
 634                 printf("UUID_TREE");
 635                 break;
 636         case BTRFS_MULTIPLE_OBJECTIDS:
 637                 printf("MULTIPLE");
 638                 break;
 639         case (u64)-1:
 640                 printf("-1");
 641                 break;
 642         case BTRFS_FIRST_CHUNK_TREE_OBJECTID:
 643                 if (type == BTRFS_CHUNK_ITEM_KEY) {
 644                         printf("FIRST_CHUNK_TREE");
 645                         break;
 646                 }
 647                 /* fall-thru */
 648         default:
 649                 printf("%llu", (unsigned long long)objectid);
 650         }
 651 }
 652
 653 void btrfs_print_key(struct btrfs_disk_key *disk_key)
 654 {
 655         u64 objectid = btrfs_disk_key_objectid(disk_key);
 656         u8 type = btrfs_disk_key_type(disk_key);
 657         u64 offset = btrfs_disk_key_offset(disk_key);
 658
 659         printf("key (");
 660         print_objectid(objectid, type);
 661         printf(" ");
 662         print_key_type(objectid, type);
 663         switch (type) {
 664         case BTRFS_QGROUP_RELATION_KEY:
 665         case BTRFS_QGROUP_INFO_KEY:
 666         case BTRFS_QGROUP_LIMIT_KEY:
 667                 printf(" %llu/%llu)", (unsigned long long)(offset >> 48),
 668                         (unsigned long long)(offset & ((1ll << 48) - 1)));
 669                 break;
 670         case BTRFS_UUID_KEY_SUBVOL:
 671         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 672                 printf(" 0x%016llx)", (unsigned long long)offset);
 673                 break;
 674         default:
 675                 if (offset == (u64)-1)
 676                         printf(" -1)");
 677                 else
 678                         printf(" %llu)", (unsigned long long)offset);
 679                 break;
 680         }
 681 }
 682
 683 static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
 684                             u32 item_size)
 685 {
 686         if (item_size & (sizeof(u64) - 1)) {
 687                 printf("btrfs: uuid item with illegal size %lu!\n",
 688                        (unsigned long)item_size);
 689                 return;
 690         }
 691         while (item_size) {
 692                 __le64 subvol_id;
 693
 694                 read_extent_buffer(l, &subvol_id, offset, sizeof(u64));
 695                 printf("\t\tsubvol_id %llu\n",
 696                         (unsigned long long)le64_to_cpu(subvol_id));
 697                 item_size -= sizeof(u64);
 698                 offset += sizeof(u64);
 699         }
 700 }
 701
 702 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 703 {
 704         int i;
 705         char *str;
 706         struct btrfs_item *item;
 707         struct btrfs_dir_item *di;
 708         struct btrfs_inode_item *ii;
 709         struct btrfs_file_extent_item *fi;
 710         struct btrfs_block_group_item *bi;
 711         struct btrfs_extent_data_ref *dref;
 712         struct btrfs_shared_data_ref *sref;
 713         struct btrfs_inode_ref *iref;
 714         struct btrfs_inode_extref *iref2;
 715         struct btrfs_dev_extent *dev_extent;
 716         struct btrfs_disk_key disk_key;
 717         struct btrfs_block_group_item bg_item;
 718         struct btrfs_dir_log_item *dlog;
 719         struct btrfs_qgroup_info_item *qg_info;
 720         struct btrfs_qgroup_limit_item *qg_limit;
 721         struct btrfs_qgroup_status_item *qg_status;
 722         u32 nr = btrfs_header_nritems(l);
 723         u64 objectid;
 724         u32 type;
 725
 726         printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
 727                 (unsigned long long)btrfs_header_bytenr(l), nr,
 728                 btrfs_leaf_free_space(root, l),
 729                 (unsigned long long)btrfs_header_generation(l),
 730                 (unsigned long long)btrfs_header_owner(l));
 731         print_uuids(l);
 732         fflush(stdout);
 733         for (i = 0 ; i < nr ; i++) {
 734                 item = btrfs_item_nr(i);
 735                 btrfs_item_key(l, &disk_key, i);
 736                 objectid = btrfs_disk_key_objectid(&disk_key);
 737                 type = btrfs_disk_key_type(&disk_key);
 738                 printf("\titem %d ", i);
 739                 btrfs_print_key(&disk_key);
 740                 printf(" itemoff %d itemsize %d\n",
 741                         btrfs_item_offset(l, item),
 742                         btrfs_item_size(l, item));
 743
 744                 if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID)
 745                         print_free_space_header(l, i);
 746
 747                 switch (type) {
 748                 case BTRFS_INODE_ITEM_KEY:
 749                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
 750                         printf("\t\tinode generation %llu transid %llu size %llu block group %llu mode %o links %u\n",
 751                                (unsigned long long)btrfs_inode_generation(l, ii),
 752                                (unsigned long long)btrfs_inode_transid(l, ii),
 753                                (unsigned long long)btrfs_inode_size(l, ii),
 754                                (unsigned long long)btrfs_inode_block_group(l,ii),
 755                                btrfs_inode_mode(l, ii),
 756                                btrfs_inode_nlink(l, ii));
 757                         break;
 758                 case BTRFS_INODE_REF_KEY:
 759                         iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
 760                         print_inode_ref_item(l, item, iref);
 761                         break;
 762                 case BTRFS_INODE_EXTREF_KEY:
 763                         iref2 = btrfs_item_ptr(l, i, struct btrfs_inode_extref);
 764                         print_inode_extref_item(l, item, iref2);
 765                         break;
 766                 case BTRFS_DIR_ITEM_KEY:
 767                 case BTRFS_DIR_INDEX_KEY:
 768                 case BTRFS_XATTR_ITEM_KEY:
 769                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 770                         print_dir_item(l, item, di);
 771                         break;
 772                 case BTRFS_DIR_LOG_INDEX_KEY:
 773                 case BTRFS_DIR_LOG_ITEM_KEY:
 774                         dlog = btrfs_item_ptr(l, i, struct btrfs_dir_log_item);
 775                         printf("\t\tdir log end %Lu\n",
 776                                (unsigned long long)btrfs_dir_log_end(l, dlog));
 777                        break;
 778                 case BTRFS_ORPHAN_ITEM_KEY:
 779                         printf("\t\torphan item\n");
 780                         break;
 781                 case BTRFS_ROOT_ITEM_KEY:
 782                         print_root(l, i);
 783                         break;
 784                 case BTRFS_ROOT_REF_KEY:
 785                         print_root_ref(l, i, "ref");
 786                         break;
 787                 case BTRFS_ROOT_BACKREF_KEY:
 788                         print_root_ref(l, i, "backref");
 789                         break;
 790                 case BTRFS_EXTENT_ITEM_KEY:
 791                         print_extent_item(l, i, 0);
 792                         break;
 793                 case BTRFS_METADATA_ITEM_KEY:
 794                         print_extent_item(l, i, 1);
 795                         break;
 796                 case BTRFS_TREE_BLOCK_REF_KEY:
 797                         printf("\t\ttree block backref\n");
 798                         break;
 799                 case BTRFS_SHARED_BLOCK_REF_KEY:
 800                         printf("\t\tshared block backref\n");
 801                         break;
 802                 case BTRFS_EXTENT_DATA_REF_KEY:
 803                         dref = btrfs_item_ptr(l, i, struct btrfs_extent_data_ref);
 804                         printf("\t\textent data backref root %llu "
 805                                "objectid %llu offset %llu count %u\n",
 806                                (unsigned long long)btrfs_extent_data_ref_root(l, dref),
 807                                (unsigned long long)btrfs_extent_data_ref_objectid(l, dref),
 808                                (unsigned long long)btrfs_extent_data_ref_offset(l, dref),
 809                                btrfs_extent_data_ref_count(l, dref));
 810                         break;
 811                 case BTRFS_SHARED_DATA_REF_KEY:
 812                         sref = btrfs_item_ptr(l, i, struct btrfs_shared_data_ref);
 813                         printf("\t\tshared data backref count %u\n",
 814                                btrfs_shared_data_ref_count(l, sref));
 815                         break;
 816                 case BTRFS_EXTENT_REF_V0_KEY:
 817 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 818                         print_extent_ref_v0(l, i);
 819 #else
 820                         BUG();
 821 #endif
 822                         break;
 823                 case BTRFS_CSUM_ITEM_KEY:
 824                         printf("\t\tcsum item\n");
 825                         break;
 826                 case BTRFS_EXTENT_CSUM_KEY:
 827                         printf("\t\textent csum item\n");
 828                         break;
 829                 case BTRFS_EXTENT_DATA_KEY:
 830                         fi = btrfs_item_ptr(l, i,
 831                                             struct btrfs_file_extent_item);
 832                         print_file_extent_item(l, item, fi);
 833                         break;
 834                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 835                         bi = btrfs_item_ptr(l, i,
 836                                             struct btrfs_block_group_item);
 837                         read_extent_buffer(l, &bg_item, (unsigned long)bi,
 838                                            sizeof(bg_item));
 839                         printf("\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
 840                                (unsigned long long)btrfs_block_group_used(&bg_item),
 841                                (unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
 842                                (unsigned long long)btrfs_block_group_flags(&bg_item));
 843                         break;
 844                 case BTRFS_CHUNK_ITEM_KEY:
 845                         print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
 846                         break;
 847                 case BTRFS_DEV_ITEM_KEY:
 848                         print_dev_item(l, btrfs_item_ptr(l, i,
 849                                         struct btrfs_dev_item));
 850                         break;
 851                 case BTRFS_DEV_EXTENT_KEY:
 852                         dev_extent = btrfs_item_ptr(l, i,
 853                                                     struct btrfs_dev_extent);
 854                         printf("\t\tdev extent chunk_tree %llu\n"
 855                                "\t\tchunk objectid %llu chunk offset %llu "
 856                                "length %llu\n",
 857                                (unsigned long long)
 858                                btrfs_dev_extent_chunk_tree(l, dev_extent),
 859                                (unsigned long long)
 860                                btrfs_dev_extent_chunk_objectid(l, dev_extent),
 861                                (unsigned long long)
 862                                btrfs_dev_extent_chunk_offset(l, dev_extent),
 863                                (unsigned long long)
 864                                btrfs_dev_extent_length(l, dev_extent));
 865                         break;
 866                 case BTRFS_QGROUP_STATUS_KEY:
 867                         qg_status = btrfs_item_ptr(l, i,
 868                                         struct btrfs_qgroup_status_item);
 869                         printf("\t\tversion %llu generation %llu flags %#llx "
 870                                 "scan %lld\n",
 871                                 (unsigned long long)
 872                                 btrfs_qgroup_status_version(l, qg_status),
 873                                 (unsigned long long)
 874                                 btrfs_qgroup_status_generation(l, qg_status),
 875                                 (unsigned long long)
 876                                 btrfs_qgroup_status_flags(l, qg_status),
 877                                 (unsigned long long)
 878                                 btrfs_qgroup_status_scan(l, qg_status));
 879                         break;
 880                 case BTRFS_QGROUP_RELATION_KEY:
 881                         break;
 882                 case BTRFS_QGROUP_INFO_KEY:
 883                         qg_info = btrfs_item_ptr(l, i,
 884                                                  struct btrfs_qgroup_info_item);
 885                         printf("\t\tgeneration %llu\n"
 886                              "\t\treferenced %lld referenced compressed %lld\n"
 887                              "\t\texclusive %lld exclusive compressed %lld\n",
 888                                (unsigned long long)
 889                                btrfs_qgroup_info_generation(l, qg_info),
 890                                (long long)
 891                                btrfs_qgroup_info_referenced(l, qg_info),
 892                                (long long)
 893                                btrfs_qgroup_info_referenced_compressed(l,
 894                                                                        qg_info),
 895                                (long long)
 896                                btrfs_qgroup_info_exclusive(l, qg_info),
 897                                (long long)
 898                                btrfs_qgroup_info_exclusive_compressed(l,
 899                                                                       qg_info));
 900                         break;
 901                 case BTRFS_QGROUP_LIMIT_KEY:
 902                         qg_limit = btrfs_item_ptr(l, i,
 903                                          struct btrfs_qgroup_limit_item);
 904                         printf("\t\tflags %llx\n"
 905                              "\t\tmax referenced %lld max exclusive %lld\n"
 906                              "\t\trsv referenced %lld rsv exclusive %lld\n",
 907                                (unsigned long long)
 908                                btrfs_qgroup_limit_flags(l, qg_limit),
 909                                (long long)
 910                                btrfs_qgroup_limit_max_referenced(l, qg_limit),
 911                                (long long)
 912                                btrfs_qgroup_limit_max_exclusive(l, qg_limit),
 913                                (long long)
 914                                btrfs_qgroup_limit_rsv_referenced(l, qg_limit),
 915                                (long long)
 916                                btrfs_qgroup_limit_rsv_exclusive(l, qg_limit));
 917                         break;
 918                 case BTRFS_UUID_KEY_SUBVOL:
 919                 case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 920                         print_uuid_item(l, btrfs_item_ptr_offset(l, i),
 921                                         btrfs_item_size_nr(l, i));
 922                         break;
 923                 case BTRFS_STRING_ITEM_KEY:
 924                         /* dirty, but it's simple */
 925                         str = l->data + btrfs_item_ptr_offset(l, i);
 926                         printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
 927                         break;
 928                 case BTRFS_DEV_STATS_KEY:
 929                         printf("\t\tdevice stats\n");
 930                         break;
 931                 };
 932                 fflush(stdout);
 933         }
 934 }
 935
 936 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb, int follow)
 937 {
 938         int i;
 939         u32 nr;
 940         u32 size;
 941         struct btrfs_disk_key disk_key;
 942         struct btrfs_key key;
 943
 944         if (!eb)
 945                 return;
 946         nr = btrfs_header_nritems(eb);
 947         if (btrfs_is_leaf(eb)) {
 948                 btrfs_print_leaf(root, eb);
 949                 return;
 950         }
 951         printf("node %llu level %d items %d free %u generation %llu owner %llu\n",
 952                (unsigned long long)eb->start,
 953                 btrfs_header_level(eb), nr,
 954                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
 955                 (unsigned long long)btrfs_header_generation(eb),
 956                 (unsigned long long)btrfs_header_owner(eb));
 957         print_uuids(eb);
 958         fflush(stdout);
 959         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
 960         for (i = 0; i < nr; i++) {
 961                 u64 blocknr = btrfs_node_blockptr(eb, i);
 962                 btrfs_node_key(eb, &disk_key, i);
 963                 btrfs_disk_key_to_cpu(&key, &disk_key);
 964                 printf("\t");
 965                 btrfs_print_key(&disk_key);
 966                 printf(" block %llu (%llu) gen %llu\n",
 967                        (unsigned long long)blocknr,
 968                        (unsigned long long)blocknr / size,
 969                        (unsigned long long)btrfs_node_ptr_generation(eb, i));
 970                 fflush(stdout);
 971         }
 972         if (!follow)
 973                 return;
 974
 975         for (i = 0; i < nr; i++) {
 976                 struct extent_buffer *next = read_tree_block(root,
 977                                              btrfs_node_blockptr(eb, i),
 978                                              size,
 979                                              btrfs_node_ptr_generation(eb, i));
 980                 if (!next) {
 981                         fprintf(stderr, "failed to read %llu in tree %llu\n",
 982                                 (unsigned long long)btrfs_node_blockptr(eb, i),
 983                                 (unsigned long long)btrfs_header_owner(eb));
 984                         continue;
 985                 }
 986                 if (btrfs_is_leaf(next) &&
 987                     btrfs_header_level(eb) != 1)
 988                         BUG();
 989                 if (btrfs_header_level(next) !=
 990                         btrfs_header_level(eb) - 1)
 991                         BUG();
 992                 btrfs_print_tree(root, next, 1);
 993                 free_extent_buffer(next);
 994         }
 995 }