print-tree.c

   1 /*
   2  * Copyright (C) 2007 Oracle.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public
   6  * License v2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public
  14  * License along with this program; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 021110-1307, USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <uuid/uuid.h>
  22 #include "kerncompat.h"
  23 #include "radix-tree.h"
  24 #include "ctree.h"
  25 #include "disk-io.h"
  26 #include "print-tree.h"
  27
  28 static int print_dir_item(struct extent_buffer *eb, struct btrfs_item *item,
  29                           struct btrfs_dir_item *di)
  30 {
  31         u32 total;
  32         u32 cur = 0;
  33         u32 len;
  34         u32 name_len;
  35         u32 data_len;
  36         char namebuf[BTRFS_NAME_LEN];
  37         struct btrfs_disk_key location;
  38
  39         total = btrfs_item_size(eb, item);
  40         while(cur < total) {
  41                 btrfs_dir_item_key(eb, di, &location);
  42                 printf("\t\tlocation ");
  43                 btrfs_print_key(&location);
  44                 printf(" type %u\n", btrfs_dir_type(eb, di));
  45                 name_len = btrfs_dir_name_len(eb, di);
  46                 data_len = btrfs_dir_data_len(eb, di);
  47                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
  48                 read_extent_buffer(eb, namebuf, (unsigned long)(di + 1), len);
  49                 printf("\t\tnamelen %u datalen %u name: %.*s\n",
  50                        name_len, data_len, len, namebuf);
  51                 if (data_len) {
  52                         len = (data_len <= sizeof(namebuf))? data_len: sizeof(namebuf);
  53                         read_extent_buffer(eb, namebuf,
  54                                 (unsigned long)(di + 1) + name_len, len);
  55                         printf("\t\tdata %.*s\n", len, namebuf);
  56                 }
  57                 len = sizeof(*di) + name_len + data_len;
  58                 di = (struct btrfs_dir_item *)((char *)di + len);
  59                 cur += len;
  60         }
  61         return 0;
  62 }
  63
  64 static int print_inode_ref_item(struct extent_buffer *eb, struct btrfs_item *item,
  65                                 struct btrfs_inode_ref *ref)
  66 {
  67         u32 total;
  68         u32 cur = 0;
  69         u32 len;
  70         u32 name_len;
  71         u64 index;
  72         char namebuf[BTRFS_NAME_LEN];
  73         total = btrfs_item_size(eb, item);
  74         while(cur < total) {
  75                 name_len = btrfs_inode_ref_name_len(eb, ref);
  76                 index = btrfs_inode_ref_index(eb, ref);
  77                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
  78                 read_extent_buffer(eb, namebuf, (unsigned long)(ref + 1), len);
  79                 printf("\t\tinode ref index %llu namelen %u name: %.*s\n",
  80                        (unsigned long long)index, name_len, len, namebuf);
  81                 len = sizeof(*ref) + name_len;
  82                 ref = (struct btrfs_inode_ref *)((char *)ref + len);
  83                 cur += len;
  84         }
  85         return 0;
  86 }
  87
  88 static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
  89 {
  90         int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
  91         int i;
  92         printf("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
  93                (unsigned long long)btrfs_chunk_length(eb, chunk),
  94                (unsigned long long)btrfs_chunk_owner(eb, chunk),
  95                (unsigned long long)btrfs_chunk_type(eb, chunk),
  96                num_stripes);
  97         for (i = 0 ; i < num_stripes ; i++) {
  98                 printf("\t\t\tstripe %d devid %llu offset %llu\n", i,
  99                       (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
 100                       (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
 101         }
 102 }
 103
 104 static void print_dev_item(struct extent_buffer *eb,
 105                            struct btrfs_dev_item *dev_item)
 106 {
 107         printf("\t\tdev item devid %llu "
 108                "total_bytes %llu bytes used %Lu\n",
 109                (unsigned long long)btrfs_device_id(eb, dev_item),
 110                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
 111                (unsigned long long)btrfs_device_bytes_used(eb, dev_item));
 112 }
 113
 114 static void print_uuids(struct extent_buffer *eb)
 115 {
 116         char fs_uuid[37];
 117         char chunk_uuid[37];
 118         u8 disk_uuid[BTRFS_UUID_SIZE];
 119
 120         read_extent_buffer(eb, disk_uuid, (unsigned long)btrfs_header_fsid(eb),
 121                            BTRFS_FSID_SIZE);
 122
 123         fs_uuid[36] = '\0';
 124         uuid_unparse(disk_uuid, fs_uuid);
 125
 126         read_extent_buffer(eb, disk_uuid,
 127                            (unsigned long)btrfs_header_chunk_tree_uuid(eb),
 128                            BTRFS_UUID_SIZE);
 129
 130         chunk_uuid[36] = '\0';
 131         uuid_unparse(disk_uuid, chunk_uuid);
 132         printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
 133 }
 134
 135 static void print_file_extent_item(struct extent_buffer *eb,
 136                                    struct btrfs_item *item,
 137                                    struct btrfs_file_extent_item *fi)
 138 {
 139         int extent_type = btrfs_file_extent_type(eb, fi);
 140
 141         if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 142                 printf("\t\tinline extent data size %u "
 143                        "ram %u compress %d\n",
 144                   btrfs_file_extent_inline_item_len(eb, item),
 145                   btrfs_file_extent_inline_len(eb, fi),
 146                   btrfs_file_extent_compression(eb, fi));
 147                 return;
 148         }
 149         if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
 150                 printf("\t\tprealloc data disk byte %llu nr %llu\n",
 151                   (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 152                   (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 153                 printf("\t\tprealloc data offset %llu nr %llu\n",
 154                   (unsigned long long)btrfs_file_extent_offset(eb, fi),
 155                   (unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
 156                 return;
 157         }
 158         printf("\t\textent data disk byte %llu nr %llu\n",
 159                 (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 160                 (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 161         printf("\t\textent data offset %llu nr %llu ram %llu\n",
 162                 (unsigned long long)btrfs_file_extent_offset(eb, fi),
 163                 (unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
 164                 (unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
 165         printf("\t\textent compression %d\n",
 166                btrfs_file_extent_compression(eb, fi));
 167 }
 168
 169 static void print_extent_item(struct extent_buffer *eb, int slot)
 170 {
 171         struct btrfs_extent_item *ei;
 172         struct btrfs_extent_inline_ref *iref;
 173         struct btrfs_extent_data_ref *dref;
 174         struct btrfs_shared_data_ref *sref;
 175         struct btrfs_disk_key key;
 176         unsigned long end;
 177         unsigned long ptr;
 178         int type;
 179         u32 item_size = btrfs_item_size_nr(eb, slot);
 180         u64 flags;
 181         u64 offset;
 182
 183         if (item_size < sizeof(*ei)) {
 184 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 185                 struct btrfs_extent_item_v0 *ei0;
 186                 BUG_ON(item_size != sizeof(*ei0));
 187                 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
 188                 printf("\t\textent refs %u\n",
 189                        btrfs_extent_refs_v0(eb, ei0));
 190                 return;
 191 #else
 192                 BUG();
 193 #endif
 194         }
 195
 196         ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
 197         flags = btrfs_extent_flags(eb, ei);
 198
 199         printf("\t\textent refs %llu gen %llu flags %llu\n",
 200                (unsigned long long)btrfs_extent_refs(eb, ei),
 201                (unsigned long long)btrfs_extent_generation(eb, ei),
 202                (unsigned long long)flags);
 203
 204         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
 205                 struct btrfs_tree_block_info *info;
 206                 info = (struct btrfs_tree_block_info *)(ei + 1);
 207                 btrfs_tree_block_key(eb, info, &key);
 208                 printf("\t\ttree block key (%llu %x %llu) level %d\n",
 209                        (unsigned long long)btrfs_disk_key_objectid(&key),
 210                        key.type,
 211                        (unsigned long long)btrfs_disk_key_offset(&key),
 212                        btrfs_tree_block_level(eb, info));
 213                 iref = (struct btrfs_extent_inline_ref *)(info + 1);
 214         } else {
 215                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 216         }
 217
 218         ptr = (unsigned long)iref;
 219         end = (unsigned long)ei + item_size;
 220         while (ptr < end) {
 221                 iref = (struct btrfs_extent_inline_ref *)ptr;
 222                 type = btrfs_extent_inline_ref_type(eb, iref);
 223                 offset = btrfs_extent_inline_ref_offset(eb, iref);
 224                 switch (type) {
 225                 case BTRFS_TREE_BLOCK_REF_KEY:
 226                         printf("\t\ttree block backref root %llu\n",
 227                                (unsigned long long)offset);
 228                         break;
 229                 case BTRFS_SHARED_BLOCK_REF_KEY:
 230                         printf("\t\tshared block backref parent %llu\n",
 231                                (unsigned long long)offset);
 232                         break;
 233                 case BTRFS_EXTENT_DATA_REF_KEY:
 234                         dref = (struct btrfs_extent_data_ref *)(&iref->offset);
 235                         printf("\t\textent data backref root %llu "
 236                                "objectid %llu offset %llu count %u\n",
 237                                (unsigned long long)btrfs_extent_data_ref_root(eb, dref),
 238                                (unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
 239                                (unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
 240                                btrfs_extent_data_ref_count(eb, dref));
 241                         break;
 242                 case BTRFS_SHARED_DATA_REF_KEY:
 243                         sref = (struct btrfs_shared_data_ref *)(iref + 1);
 244                         printf("\t\tshared data backref parent %llu count %u\n",
 245                                (unsigned long long)offset,
 246                                btrfs_shared_data_ref_count(eb, sref));
 247                         break;
 248                 default:
 249                         return;
 250                 }
 251                 ptr += btrfs_extent_inline_ref_size(type);
 252         }
 253         WARN_ON(ptr > end);
 254 }
 255
 256 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 257 static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
 258 {
 259         struct btrfs_extent_ref_v0 *ref0;
 260
 261         ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
 262         printf("\t\textent back ref root %llu gen %llu "
 263                 "owner %llu num_refs %lu\n",
 264                 (unsigned long long)btrfs_ref_root_v0(eb, ref0),
 265                 (unsigned long long)btrfs_ref_generation_v0(eb, ref0),
 266                 (unsigned long long)btrfs_ref_objectid_v0(eb, ref0),
 267                 (unsigned long)btrfs_ref_count_v0(eb, ref0));
 268 }
 269 #endif
 270
 271 static void print_root_ref(struct extent_buffer *leaf, int slot, char *tag)
 272 {
 273         struct btrfs_root_ref *ref;
 274         char namebuf[BTRFS_NAME_LEN];
 275         int namelen;
 276
 277         ref = btrfs_item_ptr(leaf, slot, struct btrfs_root_ref);
 278         namelen = btrfs_root_ref_name_len(leaf, ref);
 279         read_extent_buffer(leaf, namebuf, (unsigned long)(ref + 1), namelen);
 280         printf("\t\troot %s key dirid %llu sequence %llu name %.*s\n", tag,
 281                (unsigned long long)btrfs_root_ref_dirid(leaf, ref),
 282                (unsigned long long)btrfs_root_ref_sequence(leaf, ref),
 283                namelen, namebuf);
 284 }
 285
 286 static int count_bytes(void *buf, int len, char b)
 287 {
 288         int cnt = 0;
 289         int i;
 290         for (i = 0; i < len; i++) {
 291                 if (((char*)buf)[i] == b)
 292                         cnt++;
 293         }
 294         return cnt;
 295 }
 296
 297 static void print_root(struct extent_buffer *leaf, int slot)
 298 {
 299         struct btrfs_root_item *ri;
 300         struct btrfs_root_item root_item;
 301         int len;
 302         char uuid_str[128];
 303
 304         ri = btrfs_item_ptr(leaf, slot, struct btrfs_root_item);
 305         len = btrfs_item_size_nr(leaf, slot);
 306
 307         memset(&root_item, 0, sizeof(root_item));
 308         read_extent_buffer(leaf, &root_item, (unsigned long)ri, len);
 309
 310         printf("\t\troot data bytenr %llu level %d dirid %llu refs %u gen %llu\n",
 311                 (unsigned long long)btrfs_root_bytenr(&root_item),
 312                 btrfs_root_level(&root_item),
 313                 (unsigned long long)btrfs_root_dirid(&root_item),
 314                 btrfs_root_refs(&root_item),
 315                 (unsigned long long)btrfs_root_generation(&root_item));
 316
 317         if (root_item.generation == root_item.generation_v2) {
 318                 uuid_unparse(root_item.uuid, uuid_str);
 319                 printf("\t\tuuid %s\n", uuid_str);
 320                 if (count_bytes(root_item.parent_uuid, BTRFS_UUID_SIZE, 0) != BTRFS_UUID_SIZE) {
 321                         uuid_unparse(root_item.parent_uuid, uuid_str);
 322                         printf("\t\tparent_uuid %s\n", uuid_str);
 323                 }
 324                 if (count_bytes(root_item.received_uuid, BTRFS_UUID_SIZE, 0) != BTRFS_UUID_SIZE) {
 325                         uuid_unparse(root_item.received_uuid, uuid_str);
 326                         printf("\t\treceived_uuid %s\n", uuid_str);
 327                 }
 328                 if (root_item.ctransid) {
 329                         printf("\t\tctransid %llu otransid %llu stransid %llu rtransid %llu\n",
 330                                 btrfs_root_ctransid(&root_item),
 331                                 btrfs_root_otransid(&root_item),
 332                                 btrfs_root_stransid(&root_item),
 333                                 btrfs_root_rtransid(&root_item));
 334                 }
 335         }
 336         if (btrfs_root_refs(&root_item) == 0) {
 337                 struct btrfs_key drop_key;
 338                 btrfs_disk_key_to_cpu(&drop_key,
 339                                       &root_item.drop_progress);
 340                 printf("\t\tdrop ");
 341                 btrfs_print_key(&root_item.drop_progress);
 342                 printf(" level %d\n", root_item.drop_level);
 343         }
 344 }
 345
 346 static void print_free_space_header(struct extent_buffer *leaf, int slot)
 347 {
 348         struct btrfs_free_space_header *header;
 349         struct btrfs_disk_key location;
 350
 351         header = btrfs_item_ptr(leaf, slot, struct btrfs_free_space_header);
 352         btrfs_free_space_key(leaf, header, &location);
 353         printf("\t\tlocation ");
 354         btrfs_print_key(&location);
 355         printf("\n");
 356         printf("\t\tcache generation %llu entries %llu bitmaps %llu\n",
 357                (unsigned long long)btrfs_free_space_generation(leaf, header),
 358                (unsigned long long)btrfs_free_space_entries(leaf, header),
 359                (unsigned long long)btrfs_free_space_bitmaps(leaf, header));
 360 }
 361
 362 static void print_key_type(u64 objectid, u8 type)
 363 {
 364         if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID) {
 365                 printf("UNTYPED");
 366                 return;
 367         }
 368
 369         switch (type) {
 370         case BTRFS_INODE_ITEM_KEY:
 371                 printf("INODE_ITEM");
 372                 break;
 373         case BTRFS_INODE_REF_KEY:
 374                 printf("INODE_REF");
 375                 break;
 376         case BTRFS_DIR_ITEM_KEY:
 377                 printf("DIR_ITEM");
 378                 break;
 379         case BTRFS_DIR_INDEX_KEY:
 380                 printf("DIR_INDEX");
 381                 break;
 382         case BTRFS_DIR_LOG_ITEM_KEY:
 383                 printf("DIR_LOG_ITEM");
 384                 break;
 385         case BTRFS_DIR_LOG_INDEX_KEY:
 386                 printf("DIR_LOG_INDEX");
 387                 break;
 388         case BTRFS_XATTR_ITEM_KEY:
 389                 printf("XATTR_ITEM");
 390                 break;
 391         case BTRFS_ORPHAN_ITEM_KEY:
 392                 printf("ORPHAN_ITEM");
 393                 break;
 394         case BTRFS_ROOT_ITEM_KEY:
 395                 printf("ROOT_ITEM");
 396                 break;
 397         case BTRFS_ROOT_REF_KEY:
 398                 printf("ROOT_REF");
 399                 break;
 400         case BTRFS_ROOT_BACKREF_KEY:
 401                 printf("ROOT_BACKREF");
 402                 break;
 403         case BTRFS_EXTENT_ITEM_KEY:
 404                 printf("EXTENT_ITEM");
 405                 break;
 406         case BTRFS_TREE_BLOCK_REF_KEY:
 407                 printf("TREE_BLOCK_REF");
 408                 break;
 409         case BTRFS_SHARED_BLOCK_REF_KEY:
 410                 printf("SHARED_BLOCK_REF");
 411                 break;
 412         case BTRFS_EXTENT_DATA_REF_KEY:
 413                 printf("EXTENT_DATA_REF");
 414                 break;
 415         case BTRFS_SHARED_DATA_REF_KEY:
 416                 printf("SHARED_DATA_REF");
 417                 break;
 418         case BTRFS_EXTENT_REF_V0_KEY:
 419                 printf("EXTENT_REF_V0");
 420                 break;
 421         case BTRFS_CSUM_ITEM_KEY:
 422                 printf("CSUM_ITEM");
 423                 break;
 424         case BTRFS_EXTENT_CSUM_KEY:
 425                 printf("EXTENT_CSUM");
 426                 break;
 427         case BTRFS_EXTENT_DATA_KEY:
 428                 printf("EXTENT_DATA");
 429                 break;
 430         case BTRFS_BLOCK_GROUP_ITEM_KEY:
 431                 printf("BLOCK_GROUP_ITEM");
 432                 break;
 433         case BTRFS_CHUNK_ITEM_KEY:
 434                 printf("CHUNK_ITEM");
 435                 break;
 436         case BTRFS_DEV_ITEM_KEY:
 437                 printf("DEV_ITEM");
 438                 break;
 439         case BTRFS_DEV_EXTENT_KEY:
 440                 printf("DEV_EXTENT");
 441                 break;
 442         case BTRFS_BALANCE_ITEM_KEY:
 443                 printf("BALANCE_ITEM");
 444                 break;
 445         case BTRFS_STRING_ITEM_KEY:
 446                 printf("STRING_ITEM");
 447                 break;
 448         default:
 449                 printf("UNKNOWN");
 450         };
 451 }
 452
 453 static void print_objectid(u64 objectid, u8 type)
 454 {
 455         if (type == BTRFS_DEV_EXTENT_KEY) {
 456                 printf("%llu", (unsigned long long)objectid); /* device id */
 457                 return;
 458         }
 459
 460         switch (objectid) {
 461         case BTRFS_ROOT_TREE_OBJECTID:
 462                 if (type == BTRFS_DEV_ITEM_KEY)
 463                         printf("DEV_ITEMS");
 464                 else
 465                         printf("ROOT_TREE");
 466                 break;
 467         case BTRFS_EXTENT_TREE_OBJECTID:
 468                 printf("EXTENT_TREE");
 469                 break;
 470         case BTRFS_CHUNK_TREE_OBJECTID:
 471                 printf("CHUNK_TREE");
 472                 break;
 473         case BTRFS_DEV_TREE_OBJECTID:
 474                 printf("DEV_TREE");
 475                 break;
 476         case BTRFS_FS_TREE_OBJECTID:
 477                 printf("FS_TREE");
 478                 break;
 479         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 480                 printf("ROOT_TREE_DIR");
 481                 break;
 482         case BTRFS_CSUM_TREE_OBJECTID:
 483                 printf("CSUM_TREE");
 484                 break;
 485         case BTRFS_BALANCE_OBJECTID:
 486                 printf("BALANCE");
 487                 break;
 488         case BTRFS_ORPHAN_OBJECTID:
 489                 printf("ORPHAN");
 490                 break;
 491         case BTRFS_TREE_LOG_OBJECTID:
 492                 printf("TREE_LOG");
 493                 break;
 494         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 495                 printf("LOG_FIXUP");
 496                 break;
 497         case BTRFS_TREE_RELOC_OBJECTID:
 498                 printf("TREE_RELOC");
 499                 break;
 500         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 501                 printf("DATA_RELOC_TREE");
 502                 break;
 503         case BTRFS_EXTENT_CSUM_OBJECTID:
 504                 printf("EXTENT_CSUM");
 505                 break;
 506         case BTRFS_FREE_SPACE_OBJECTID:
 507                 printf("FREE_SPACE");
 508                 break;
 509         case BTRFS_FREE_INO_OBJECTID:
 510                 printf("FREE_INO");
 511                 break;
 512         case BTRFS_MULTIPLE_OBJECTIDS:
 513                 printf("MULTIPLE");
 514                 break;
 515         case BTRFS_FIRST_CHUNK_TREE_OBJECTID:
 516                 if (type == BTRFS_CHUNK_ITEM_KEY) {
 517                         printf("FIRST_CHUNK_TREE");
 518                         break;
 519                 }
 520                 /* fall-thru */
 521         default:
 522                 printf("%llu", (unsigned long long)objectid);
 523         }
 524 }
 525
 526 void btrfs_print_key(struct btrfs_disk_key *disk_key)
 527 {
 528         u64 objectid = btrfs_disk_key_objectid(disk_key);
 529         u8 type = btrfs_disk_key_type(disk_key);
 530
 531         printf("key (");
 532         print_objectid(objectid, type);
 533         printf(" ");
 534         print_key_type(objectid, type);
 535         printf(" %llu)", (unsigned long long)btrfs_disk_key_offset(disk_key));
 536 }
 537
 538 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 539 {
 540         int i;
 541         char *str;
 542         struct btrfs_item *item;
 543         struct btrfs_dir_item *di;
 544         struct btrfs_inode_item *ii;
 545         struct btrfs_file_extent_item *fi;
 546         struct btrfs_block_group_item *bi;
 547         struct btrfs_extent_data_ref *dref;
 548         struct btrfs_shared_data_ref *sref;
 549         struct btrfs_inode_ref *iref;
 550         struct btrfs_dev_extent *dev_extent;
 551         struct btrfs_disk_key disk_key;
 552         struct btrfs_block_group_item bg_item;
 553         struct btrfs_dir_log_item *dlog;
 554         u32 nr = btrfs_header_nritems(l);
 555         u64 objectid;
 556         u32 type;
 557
 558         printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
 559                 (unsigned long long)btrfs_header_bytenr(l), nr,
 560                 btrfs_leaf_free_space(root, l),
 561                 (unsigned long long)btrfs_header_generation(l),
 562                 (unsigned long long)btrfs_header_owner(l));
 563         print_uuids(l);
 564         fflush(stdout);
 565         for (i = 0 ; i < nr ; i++) {
 566                 item = btrfs_item_nr(l, i);
 567                 btrfs_item_key(l, &disk_key, i);
 568                 objectid = btrfs_disk_key_objectid(&disk_key);
 569                 type = btrfs_disk_key_type(&disk_key);
 570                 printf("\titem %d ", i);
 571                 btrfs_print_key(&disk_key);
 572                 printf(" itemoff %d itemsize %d\n",
 573                         btrfs_item_offset(l, item),
 574                         btrfs_item_size(l, item));
 575
 576                 if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID)
 577                         print_free_space_header(l, i);
 578
 579                 switch (type) {
 580                 case BTRFS_INODE_ITEM_KEY:
 581                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
 582                         printf("\t\tinode generation %llu transid %llu size %llu block group %llu mode %o links %u\n",
 583                                (unsigned long long)btrfs_inode_generation(l, ii),
 584                                (unsigned long long)btrfs_inode_transid(l, ii),
 585                                (unsigned long long)btrfs_inode_size(l, ii),
 586                                (unsigned long long)btrfs_inode_block_group(l,ii),
 587                                btrfs_inode_mode(l, ii),
 588                                btrfs_inode_nlink(l, ii));
 589                         break;
 590                 case BTRFS_INODE_REF_KEY:
 591                         iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
 592                         print_inode_ref_item(l, item, iref);
 593                         break;
 594                 case BTRFS_DIR_ITEM_KEY:
 595                 case BTRFS_DIR_INDEX_KEY:
 596                 case BTRFS_XATTR_ITEM_KEY:
 597                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 598                         print_dir_item(l, item, di);
 599                         break;
 600                 case BTRFS_DIR_LOG_INDEX_KEY:
 601                 case BTRFS_DIR_LOG_ITEM_KEY:
 602                         dlog = btrfs_item_ptr(l, i, struct btrfs_dir_log_item);
 603                         printf("\t\tdir log end %Lu\n",
 604                                (unsigned long long)btrfs_dir_log_end(l, dlog));
 605                        break;
 606                 case BTRFS_ORPHAN_ITEM_KEY:
 607                         printf("\t\torphan item\n");
 608                         break;
 609                 case BTRFS_ROOT_ITEM_KEY:
 610                         print_root(l, i);
 611                         break;
 612                 case BTRFS_ROOT_REF_KEY:
 613                         print_root_ref(l, i, "ref");
 614                         break;
 615                 case BTRFS_ROOT_BACKREF_KEY:
 616                         print_root_ref(l, i, "backref");
 617                         break;
 618                 case BTRFS_EXTENT_ITEM_KEY:
 619                         print_extent_item(l, i);
 620                         break;
 621                 case BTRFS_TREE_BLOCK_REF_KEY:
 622                         printf("\t\ttree block backref\n");
 623                         break;
 624                 case BTRFS_SHARED_BLOCK_REF_KEY:
 625                         printf("\t\tshared block backref\n");
 626                         break;
 627                 case BTRFS_EXTENT_DATA_REF_KEY:
 628                         dref = btrfs_item_ptr(l, i, struct btrfs_extent_data_ref);
 629                         printf("\t\textent data backref root %llu "
 630                                "objectid %llu offset %llu count %u\n",
 631                                (unsigned long long)btrfs_extent_data_ref_root(l, dref),
 632                                (unsigned long long)btrfs_extent_data_ref_objectid(l, dref),
 633                                (unsigned long long)btrfs_extent_data_ref_offset(l, dref),
 634                                btrfs_extent_data_ref_count(l, dref));
 635                         break;
 636                 case BTRFS_SHARED_DATA_REF_KEY:
 637                         sref = btrfs_item_ptr(l, i, struct btrfs_shared_data_ref);
 638                         printf("\t\tshared data backref count %u\n",
 639                                btrfs_shared_data_ref_count(l, sref));
 640                         break;
 641                 case BTRFS_EXTENT_REF_V0_KEY:
 642 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 643                         print_extent_ref_v0(l, i);
 644 #else
 645                         BUG();
 646 #endif
 647                         break;
 648                 case BTRFS_CSUM_ITEM_KEY:
 649                         printf("\t\tcsum item\n");
 650                         break;
 651                 case BTRFS_EXTENT_CSUM_KEY:
 652                         printf("\t\textent csum item\n");
 653                         break;
 654                 case BTRFS_EXTENT_DATA_KEY:
 655                         fi = btrfs_item_ptr(l, i,
 656                                             struct btrfs_file_extent_item);
 657                         print_file_extent_item(l, item, fi);
 658                         break;
 659                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 660                         bi = btrfs_item_ptr(l, i,
 661                                             struct btrfs_block_group_item);
 662                         read_extent_buffer(l, &bg_item, (unsigned long)bi,
 663                                            sizeof(bg_item));
 664                         printf("\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
 665                                (unsigned long long)btrfs_block_group_used(&bg_item),
 666                                (unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
 667                                (unsigned long long)btrfs_block_group_flags(&bg_item));
 668                         break;
 669                 case BTRFS_CHUNK_ITEM_KEY:
 670                         print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
 671                         break;
 672                 case BTRFS_DEV_ITEM_KEY:
 673                         print_dev_item(l, btrfs_item_ptr(l, i,
 674                                         struct btrfs_dev_item));
 675                         break;
 676                 case BTRFS_DEV_EXTENT_KEY:
 677                         dev_extent = btrfs_item_ptr(l, i,
 678                                                     struct btrfs_dev_extent);
 679                         printf("\t\tdev extent chunk_tree %llu\n"
 680                                "\t\tchunk objectid %llu chunk offset %llu "
 681                                "length %llu\n",
 682                                (unsigned long long)
 683                                btrfs_dev_extent_chunk_tree(l, dev_extent),
 684                                (unsigned long long)
 685                                btrfs_dev_extent_chunk_objectid(l, dev_extent),
 686                                (unsigned long long)
 687                                btrfs_dev_extent_chunk_offset(l, dev_extent),
 688                                (unsigned long long)
 689                                btrfs_dev_extent_length(l, dev_extent));
 690                         break;
 691                 case BTRFS_STRING_ITEM_KEY:
 692                         /* dirty, but it's simple */
 693                         str = l->data + btrfs_item_ptr_offset(l, i);
 694                         printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
 695                         break;
 696                 };
 697                 fflush(stdout);
 698         }
 699 }
 700
 701 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb, int follow)
 702 {
 703         int i;
 704         u32 nr;
 705         u32 size;
 706         struct btrfs_disk_key disk_key;
 707         struct btrfs_key key;
 708
 709         if (!eb)
 710                 return;
 711         nr = btrfs_header_nritems(eb);
 712         if (btrfs_is_leaf(eb)) {
 713                 btrfs_print_leaf(root, eb);
 714                 return;
 715         }
 716         printf("node %llu level %d items %d free %u generation %llu owner %llu\n",
 717                (unsigned long long)eb->start,
 718                 btrfs_header_level(eb), nr,
 719                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
 720                 (unsigned long long)btrfs_header_generation(eb),
 721                 (unsigned long long)btrfs_header_owner(eb));
 722         print_uuids(eb);
 723         fflush(stdout);
 724         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
 725         for (i = 0; i < nr; i++) {
 726                 u64 blocknr = btrfs_node_blockptr(eb, i);
 727                 btrfs_node_key(eb, &disk_key, i);
 728                 btrfs_disk_key_to_cpu(&key, &disk_key);
 729                 printf("\t");
 730                 btrfs_print_key(&disk_key);
 731                 printf(" block %llu (%llu) gen %llu\n",
 732                        (unsigned long long)blocknr,
 733                        (unsigned long long)blocknr / size,
 734                        (unsigned long long)btrfs_node_ptr_generation(eb, i));
 735                 fflush(stdout);
 736         }
 737         if (!follow)
 738                 return;
 739
 740         for (i = 0; i < nr; i++) {
 741                 struct extent_buffer *next = read_tree_block(root,
 742                                              btrfs_node_blockptr(eb, i),
 743                                              size,
 744                                              btrfs_node_ptr_generation(eb, i));
 745                 if (!next) {
 746                         fprintf(stderr, "failed to read %llu in tree %llu\n",
 747                                 (unsigned long long)btrfs_node_blockptr(eb, i),
 748                                 (unsigned long long)btrfs_header_owner(eb));
 749                         continue;
 750                 }
 751                 if (btrfs_is_leaf(next) &&
 752                     btrfs_header_level(eb) != 1)
 753                         BUG();
 754                 if (btrfs_header_level(next) !=
 755                         btrfs_header_level(eb) - 1)
 756                         BUG();
 757                 btrfs_print_tree(root, next, 1);
 758                 free_extent_buffer(next);
 759         }
 760 }