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