print-tree.c

   1 /*
   2  * Copyright (C) 2007 Oracle.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public
   6  * License v2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public
  14  * License along with this program; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 021110-1307, USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <uuid/uuid.h>
  22 #include "kerncompat.h"
  23 #include "radix-tree.h"
  24 #include "ctree.h"
  25 #include "disk-io.h"
  26 #include "print-tree.h"
  27 #include "utils.h"
  28
  29
  30 static void print_dir_item_type(struct extent_buffer *eb,
  31                                 struct btrfs_dir_item *di)
  32 {
  33         u8 type = btrfs_dir_type(eb, di);
  34
  35         switch (type) {
  36         case BTRFS_FT_REG_FILE:
  37                 printf("FILE");
  38                 break;
  39         case BTRFS_FT_DIR:
  40                 printf("DIR");
  41                 break;
  42         case BTRFS_FT_CHRDEV:
  43                 printf("CHRDEV");
  44                 break;
  45         case BTRFS_FT_BLKDEV:
  46                 printf("BLKDEV");
  47                 break;
  48         case BTRFS_FT_FIFO:
  49                 printf("FIFO");
  50                 break;
  51         case BTRFS_FT_SOCK:
  52                 printf("SOCK");
  53                 break;
  54         case BTRFS_FT_SYMLINK:
  55                 printf("SYMLINK");
  56                 break;
  57         case BTRFS_FT_XATTR:
  58                 printf("XATTR");
  59                 break;
  60         default:
  61                 printf("%u", type);
  62         }
  63 }
  64
  65 static int print_dir_item(struct extent_buffer *eb, struct btrfs_item *item,
  66                           struct btrfs_dir_item *di)
  67 {
  68         u32 total;
  69         u32 cur = 0;
  70         u32 len;
  71         u32 name_len;
  72         u32 data_len;
  73         char namebuf[BTRFS_NAME_LEN];
  74         struct btrfs_disk_key location;
  75
  76         total = btrfs_item_size(eb, item);
  77         while(cur < total) {
  78                 btrfs_dir_item_key(eb, di, &location);
  79                 printf("\t\tlocation ");
  80                 btrfs_print_key(&location);
  81                 printf(" type ");
  82                 print_dir_item_type(eb, di);
  83                 printf("\n");
  84                 name_len = btrfs_dir_name_len(eb, di);
  85                 data_len = btrfs_dir_data_len(eb, di);
  86                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
  87                 read_extent_buffer(eb, namebuf, (unsigned long)(di + 1), len);
  88                 printf("\t\tnamelen %u datalen %u name: %.*s\n",
  89                        name_len, data_len, len, namebuf);
  90                 if (data_len) {
  91                         len = (data_len <= sizeof(namebuf))? data_len: sizeof(namebuf);
  92                         read_extent_buffer(eb, namebuf,
  93                                 (unsigned long)(di + 1) + name_len, len);
  94                         printf("\t\tdata %.*s\n", len, namebuf);
  95                 }
  96                 len = sizeof(*di) + name_len + data_len;
  97                 di = (struct btrfs_dir_item *)((char *)di + len);
  98                 cur += len;
  99         }
 100         return 0;
 101 }
 102
 103 static int print_inode_extref_item(struct extent_buffer *eb,
 104                                    struct btrfs_item *item,
 105                                    struct btrfs_inode_extref *extref)
 106 {
 107         u32 total;
 108         u32 cur = 0;
 109         u32 len;
 110         u32 name_len = 0;
 111         u64 index = 0;
 112         u64 parent_objid;
 113         char namebuf[BTRFS_NAME_LEN];
 114
 115         total = btrfs_item_size(eb, item);
 116
 117         while (cur < total) {
 118                 index = btrfs_inode_extref_index(eb, extref);
 119                 name_len = btrfs_inode_extref_name_len(eb, extref);
 120                 parent_objid = btrfs_inode_extref_parent(eb, extref);
 121
 122                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
 123
 124                 read_extent_buffer(eb, namebuf, (unsigned long)(extref->name), len);
 125
 126                 printf("\t\tinode extref index %llu parent %llu namelen %u "
 127                        "name: %.*s\n",
 128                        (unsigned long long)index,
 129                        (unsigned long long)parent_objid,
 130                        name_len, len, namebuf);
 131
 132                 len = sizeof(*extref) + name_len;
 133                 extref = (struct btrfs_inode_extref *)((char *)extref + len);
 134                 cur += len;
 135         }
 136         return 0;
 137 }
 138
 139 static int print_inode_ref_item(struct extent_buffer *eb, struct btrfs_item *item,
 140                                 struct btrfs_inode_ref *ref)
 141 {
 142         u32 total;
 143         u32 cur = 0;
 144         u32 len;
 145         u32 name_len;
 146         u64 index;
 147         char namebuf[BTRFS_NAME_LEN];
 148         total = btrfs_item_size(eb, item);
 149         while(cur < total) {
 150                 name_len = btrfs_inode_ref_name_len(eb, ref);
 151                 index = btrfs_inode_ref_index(eb, ref);
 152                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
 153                 read_extent_buffer(eb, namebuf, (unsigned long)(ref + 1), len);
 154                 printf("\t\tinode ref index %llu namelen %u name: %.*s\n",
 155                        (unsigned long long)index, name_len, len, namebuf);
 156                 len = sizeof(*ref) + name_len;
 157                 ref = (struct btrfs_inode_ref *)((char *)ref + len);
 158                 cur += len;
 159         }
 160         return 0;
 161 }
 162
 163 /* Caller should ensure sizeof(*ret)>=21 "DATA|METADATA|RAID10" */
 164 static void bg_flags_to_str(u64 flags, char *ret)
 165 {
 166         int empty = 1;
 167
 168         if (flags & BTRFS_BLOCK_GROUP_DATA) {
 169                 empty = 0;
 170                 strcpy(ret, "DATA");
 171         }
 172         if (flags & BTRFS_BLOCK_GROUP_METADATA) {
 173                 if (!empty)
 174                         strcat(ret, "|");
 175                 strcat(ret, "METADATA");
 176         }
 177         if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
 178                 if (!empty)
 179                         strcat(ret, "|");
 180                 strcat(ret, "SYSTEM");
 181         }
 182         switch (flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
 183         case BTRFS_BLOCK_GROUP_RAID0:
 184                 strcat(ret, "|RAID0");
 185                 break;
 186         case BTRFS_BLOCK_GROUP_RAID1:
 187                 strcat(ret, "|RAID1");
 188                 break;
 189         case BTRFS_BLOCK_GROUP_DUP:
 190                 strcat(ret, "|DUP");
 191                 break;
 192         case BTRFS_BLOCK_GROUP_RAID10:
 193                 strcat(ret, "|RAID10");
 194                 break;
 195         case BTRFS_BLOCK_GROUP_RAID5:
 196                 strcat(ret, "|RAID5");
 197                 break;
 198         case BTRFS_BLOCK_GROUP_RAID6:
 199                 strcat(ret, "|RAID6");
 200                 break;
 201         default:
 202                 break;
 203         }
 204 }
 205
 206 void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
 207 {
 208         int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
 209         int i;
 210         char chunk_flags_str[32] = {0};
 211
 212         bg_flags_to_str(btrfs_chunk_type(eb, chunk), chunk_flags_str);
 213         printf("\t\tchunk length %llu owner %llu type %s num_stripes %d\n",
 214                (unsigned long long)btrfs_chunk_length(eb, chunk),
 215                (unsigned long long)btrfs_chunk_owner(eb, chunk),
 216                chunk_flags_str, num_stripes);
 217         for (i = 0 ; i < num_stripes ; i++) {
 218                 printf("\t\t\tstripe %d devid %llu offset %llu\n", i,
 219                       (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
 220                       (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
 221         }
 222 }
 223
 224 static void print_dev_item(struct extent_buffer *eb,
 225                            struct btrfs_dev_item *dev_item)
 226 {
 227         char disk_uuid_c[BTRFS_UUID_UNPARSED_SIZE];
 228         u8 disk_uuid[BTRFS_UUID_SIZE];
 229
 230         read_extent_buffer(eb, disk_uuid,
 231                            (unsigned long)btrfs_device_uuid(dev_item),
 232                            BTRFS_UUID_SIZE);
 233         uuid_unparse(disk_uuid, disk_uuid_c);
 234         printf("\t\tdev item devid %llu "
 235                "total_bytes %llu bytes used %Lu\n"
 236                "\t\tdev uuid %s\n",
 237                (unsigned long long)btrfs_device_id(eb, dev_item),
 238                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
 239                (unsigned long long)btrfs_device_bytes_used(eb, dev_item),
 240                disk_uuid_c);
 241 }
 242
 243 static void print_uuids(struct extent_buffer *eb)
 244 {
 245         char fs_uuid[BTRFS_UUID_UNPARSED_SIZE];
 246         char chunk_uuid[BTRFS_UUID_UNPARSED_SIZE];
 247         u8 disk_uuid[BTRFS_UUID_SIZE];
 248
 249         read_extent_buffer(eb, disk_uuid, btrfs_header_fsid(),
 250                            BTRFS_FSID_SIZE);
 251
 252         fs_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 253         uuid_unparse(disk_uuid, fs_uuid);
 254
 255         read_extent_buffer(eb, disk_uuid,
 256                            btrfs_header_chunk_tree_uuid(eb),
 257                            BTRFS_UUID_SIZE);
 258
 259         chunk_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 260         uuid_unparse(disk_uuid, chunk_uuid);
 261         printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
 262 }
 263
 264 static void print_file_extent_item(struct extent_buffer *eb,
 265                                    struct btrfs_item *item,
 266                                    int slot,
 267                                    struct btrfs_file_extent_item *fi)
 268 {
 269         int extent_type = btrfs_file_extent_type(eb, fi);
 270
 271         if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 272                 printf("\t\tinline extent data size %u "
 273                        "ram %u compress %d\n",
 274                   btrfs_file_extent_inline_item_len(eb, item),
 275                   btrfs_file_extent_inline_len(eb, slot, fi),
 276                   btrfs_file_extent_compression(eb, fi));
 277                 return;
 278         }
 279         if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
 280                 printf("\t\tprealloc data disk byte %llu nr %llu\n",
 281                   (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 282                   (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 283                 printf("\t\tprealloc data offset %llu nr %llu\n",
 284                   (unsigned long long)btrfs_file_extent_offset(eb, fi),
 285                   (unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
 286                 return;
 287         }
 288         printf("\t\textent data disk byte %llu nr %llu\n",
 289                 (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 290                 (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 291         printf("\t\textent data offset %llu nr %llu ram %llu\n",
 292                 (unsigned long long)btrfs_file_extent_offset(eb, fi),
 293                 (unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
 294                 (unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
 295         printf("\t\textent compression %d\n",
 296                btrfs_file_extent_compression(eb, fi));
 297 }
 298
 299 /* Caller should ensure sizeof(*ret) >= 16("DATA|TREE_BLOCK") */
 300 static void extent_flags_to_str(u64 flags, char *ret)
 301 {
 302         int empty = 1;
 303
 304         if (flags & BTRFS_EXTENT_FLAG_DATA) {
 305                 empty = 0;
 306                 strcpy(ret, "DATA");
 307         }
 308         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
 309                 if (!empty) {
 310                         empty = 0;
 311                         strcat(ret, "|");
 312                 }
 313                 strcat(ret, "TREE_BLOCK");
 314         }
 315 }
 316
 317 void print_extent_item(struct extent_buffer *eb, int slot, int metadata)
 318 {
 319         struct btrfs_extent_item *ei;
 320         struct btrfs_extent_inline_ref *iref;
 321         struct btrfs_extent_data_ref *dref;
 322         struct btrfs_shared_data_ref *sref;
 323         struct btrfs_disk_key key;
 324         unsigned long end;
 325         unsigned long ptr;
 326         int type;
 327         u32 item_size = btrfs_item_size_nr(eb, slot);
 328         u64 flags;
 329         u64 offset;
 330         char flags_str[32] = {0};
 331
 332         if (item_size < sizeof(*ei)) {
 333 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 334                 struct btrfs_extent_item_v0 *ei0;
 335                 BUG_ON(item_size != sizeof(*ei0));
 336                 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
 337                 printf("\t\textent refs %u\n",
 338                        btrfs_extent_refs_v0(eb, ei0));
 339                 return;
 340 #else
 341                 BUG();
 342 #endif
 343         }
 344
 345         ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
 346         flags = btrfs_extent_flags(eb, ei);
 347         extent_flags_to_str(flags, flags_str);
 348
 349         printf("\t\textent refs %llu gen %llu flags %s\n",
 350                (unsigned long long)btrfs_extent_refs(eb, ei),
 351                (unsigned long long)btrfs_extent_generation(eb, ei),
 352                flags_str);
 353
 354         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK && !metadata) {
 355                 struct btrfs_tree_block_info *info;
 356                 info = (struct btrfs_tree_block_info *)(ei + 1);
 357                 btrfs_tree_block_key(eb, info, &key);
 358                 printf("\t\ttree block ");
 359                 btrfs_print_key(&key);
 360                 printf(" level %d\n", btrfs_tree_block_level(eb, info));
 361                 iref = (struct btrfs_extent_inline_ref *)(info + 1);
 362         } else if (metadata) {
 363                 struct btrfs_key tmp;
 364
 365                 btrfs_item_key_to_cpu(eb, &tmp, slot);
 366                 printf("\t\ttree block skinny level %d\n", (int)tmp.offset);
 367                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 368         } else{
 369                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 370         }
 371
 372         ptr = (unsigned long)iref;
 373         end = (unsigned long)ei + item_size;
 374         while (ptr < end) {
 375                 iref = (struct btrfs_extent_inline_ref *)ptr;
 376                 type = btrfs_extent_inline_ref_type(eb, iref);
 377                 offset = btrfs_extent_inline_ref_offset(eb, iref);
 378                 switch (type) {
 379                 case BTRFS_TREE_BLOCK_REF_KEY:
 380                         printf("\t\ttree block backref root %llu\n",
 381                                (unsigned long long)offset);
 382                         break;
 383                 case BTRFS_SHARED_BLOCK_REF_KEY:
 384                         printf("\t\tshared block backref parent %llu\n",
 385                                (unsigned long long)offset);
 386                         break;
 387                 case BTRFS_EXTENT_DATA_REF_KEY:
 388                         dref = (struct btrfs_extent_data_ref *)(&iref->offset);
 389                         printf("\t\textent data backref root %llu "
 390                                "objectid %llu offset %llu count %u\n",
 391                                (unsigned long long)btrfs_extent_data_ref_root(eb, dref),
 392                                (unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
 393                                (unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
 394                                btrfs_extent_data_ref_count(eb, dref));
 395                         break;
 396                 case BTRFS_SHARED_DATA_REF_KEY:
 397                         sref = (struct btrfs_shared_data_ref *)(iref + 1);
 398                         printf("\t\tshared data backref parent %llu count %u\n",
 399                                (unsigned long long)offset,
 400                                btrfs_shared_data_ref_count(eb, sref));
 401                         break;
 402                 default:
 403                         return;
 404                 }
 405                 ptr += btrfs_extent_inline_ref_size(type);
 406         }
 407         WARN_ON(ptr > end);
 408 }
 409
 410 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 411 static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
 412 {
 413         struct btrfs_extent_ref_v0 *ref0;
 414
 415         ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
 416         printf("\t\textent back ref root %llu gen %llu "
 417                 "owner %llu num_refs %lu\n",
 418                 (unsigned long long)btrfs_ref_root_v0(eb, ref0),
 419                 (unsigned long long)btrfs_ref_generation_v0(eb, ref0),
 420                 (unsigned long long)btrfs_ref_objectid_v0(eb, ref0),
 421                 (unsigned long)btrfs_ref_count_v0(eb, ref0));
 422 }
 423 #endif
 424
 425 static void print_root_ref(struct extent_buffer *leaf, int slot, char *tag)
 426 {
 427         struct btrfs_root_ref *ref;
 428         char namebuf[BTRFS_NAME_LEN];
 429         int namelen;
 430
 431         ref = btrfs_item_ptr(leaf, slot, struct btrfs_root_ref);
 432         namelen = btrfs_root_ref_name_len(leaf, ref);
 433         read_extent_buffer(leaf, namebuf, (unsigned long)(ref + 1), namelen);
 434         printf("\t\troot %s key dirid %llu sequence %llu name %.*s\n", tag,
 435                (unsigned long long)btrfs_root_ref_dirid(leaf, ref),
 436                (unsigned long long)btrfs_root_ref_sequence(leaf, ref),
 437                namelen, namebuf);
 438 }
 439
 440 static int count_bytes(void *buf, int len, char b)
 441 {
 442         int cnt = 0;
 443         int i;
 444         for (i = 0; i < len; i++) {
 445                 if (((char*)buf)[i] == b)
 446                         cnt++;
 447         }
 448         return cnt;
 449 }
 450
 451 static void print_root(struct extent_buffer *leaf, int slot)
 452 {
 453         struct btrfs_root_item *ri;
 454         struct btrfs_root_item root_item;
 455         int len;
 456         char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
 457
 458         ri = btrfs_item_ptr(leaf, slot, struct btrfs_root_item);
 459         len = btrfs_item_size_nr(leaf, slot);
 460
 461         memset(&root_item, 0, sizeof(root_item));
 462         read_extent_buffer(leaf, &root_item, (unsigned long)ri, len);
 463
 464         printf("\t\troot data bytenr %llu level %d dirid %llu refs %u gen %llu\n",
 465                 (unsigned long long)btrfs_root_bytenr(&root_item),
 466                 btrfs_root_level(&root_item),
 467                 (unsigned long long)btrfs_root_dirid(&root_item),
 468                 btrfs_root_refs(&root_item),
 469                 (unsigned long long)btrfs_root_generation(&root_item));
 470
 471         if (root_item.generation == root_item.generation_v2) {
 472                 uuid_unparse(root_item.uuid, uuid_str);
 473                 printf("\t\tuuid %s\n", uuid_str);
 474                 if (count_bytes(root_item.parent_uuid, BTRFS_UUID_SIZE, 0) != BTRFS_UUID_SIZE) {
 475                         uuid_unparse(root_item.parent_uuid, uuid_str);
 476                         printf("\t\tparent_uuid %s\n", uuid_str);
 477                 }
 478                 if (count_bytes(root_item.received_uuid, BTRFS_UUID_SIZE, 0) != BTRFS_UUID_SIZE) {
 479                         uuid_unparse(root_item.received_uuid, uuid_str);
 480                         printf("\t\treceived_uuid %s\n", uuid_str);
 481                 }
 482                 if (root_item.ctransid) {
 483                         printf("\t\tctransid %llu otransid %llu stransid %llu rtransid %llu\n",
 484                                 btrfs_root_ctransid(&root_item),
 485                                 btrfs_root_otransid(&root_item),
 486                                 btrfs_root_stransid(&root_item),
 487                                 btrfs_root_rtransid(&root_item));
 488                 }
 489         }
 490         if (btrfs_root_refs(&root_item) == 0) {
 491                 struct btrfs_key drop_key;
 492                 btrfs_disk_key_to_cpu(&drop_key,
 493                                       &root_item.drop_progress);
 494                 printf("\t\tdrop ");
 495                 btrfs_print_key(&root_item.drop_progress);
 496                 printf(" level %d\n", root_item.drop_level);
 497         }
 498 }
 499
 500 static void print_free_space_header(struct extent_buffer *leaf, int slot)
 501 {
 502         struct btrfs_free_space_header *header;
 503         struct btrfs_disk_key location;
 504
 505         header = btrfs_item_ptr(leaf, slot, struct btrfs_free_space_header);
 506         btrfs_free_space_key(leaf, header, &location);
 507         printf("\t\tlocation ");
 508         btrfs_print_key(&location);
 509         printf("\n");
 510         printf("\t\tcache generation %llu entries %llu bitmaps %llu\n",
 511                (unsigned long long)btrfs_free_space_generation(leaf, header),
 512                (unsigned long long)btrfs_free_space_entries(leaf, header),
 513                (unsigned long long)btrfs_free_space_bitmaps(leaf, header));
 514 }
 515
 516 static void print_key_type(u64 objectid, u8 type)
 517 {
 518         if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID) {
 519                 printf("UNTYPED");
 520                 return;
 521         }
 522
 523         switch (type) {
 524         case BTRFS_INODE_ITEM_KEY:
 525                 printf("INODE_ITEM");
 526                 break;
 527         case BTRFS_INODE_REF_KEY:
 528                 printf("INODE_REF");
 529                 break;
 530         case BTRFS_INODE_EXTREF_KEY:
 531                 printf("INODE_EXTREF");
 532                 break;
 533         case BTRFS_DIR_ITEM_KEY:
 534                 printf("DIR_ITEM");
 535                 break;
 536         case BTRFS_DIR_INDEX_KEY:
 537                 printf("DIR_INDEX");
 538                 break;
 539         case BTRFS_DIR_LOG_ITEM_KEY:
 540                 printf("DIR_LOG_ITEM");
 541                 break;
 542         case BTRFS_DIR_LOG_INDEX_KEY:
 543                 printf("DIR_LOG_INDEX");
 544                 break;
 545         case BTRFS_XATTR_ITEM_KEY:
 546                 printf("XATTR_ITEM");
 547                 break;
 548         case BTRFS_ORPHAN_ITEM_KEY:
 549                 printf("ORPHAN_ITEM");
 550                 break;
 551         case BTRFS_ROOT_ITEM_KEY:
 552                 printf("ROOT_ITEM");
 553                 break;
 554         case BTRFS_ROOT_REF_KEY:
 555                 printf("ROOT_REF");
 556                 break;
 557         case BTRFS_ROOT_BACKREF_KEY:
 558                 printf("ROOT_BACKREF");
 559                 break;
 560         case BTRFS_EXTENT_ITEM_KEY:
 561                 printf("EXTENT_ITEM");
 562                 break;
 563         case BTRFS_METADATA_ITEM_KEY:
 564                 printf("METADATA_ITEM");
 565                 break;
 566         case BTRFS_TREE_BLOCK_REF_KEY:
 567                 printf("TREE_BLOCK_REF");
 568                 break;
 569         case BTRFS_SHARED_BLOCK_REF_KEY:
 570                 printf("SHARED_BLOCK_REF");
 571                 break;
 572         case BTRFS_EXTENT_DATA_REF_KEY:
 573                 printf("EXTENT_DATA_REF");
 574                 break;
 575         case BTRFS_SHARED_DATA_REF_KEY:
 576                 printf("SHARED_DATA_REF");
 577                 break;
 578         case BTRFS_EXTENT_REF_V0_KEY:
 579                 printf("EXTENT_REF_V0");
 580                 break;
 581         case BTRFS_CSUM_ITEM_KEY:
 582                 printf("CSUM_ITEM");
 583                 break;
 584         case BTRFS_EXTENT_CSUM_KEY:
 585                 printf("EXTENT_CSUM");
 586                 break;
 587         case BTRFS_EXTENT_DATA_KEY:
 588                 printf("EXTENT_DATA");
 589                 break;
 590         case BTRFS_BLOCK_GROUP_ITEM_KEY:
 591                 printf("BLOCK_GROUP_ITEM");
 592                 break;
 593         case BTRFS_CHUNK_ITEM_KEY:
 594                 printf("CHUNK_ITEM");
 595                 break;
 596         case BTRFS_DEV_ITEM_KEY:
 597                 printf("DEV_ITEM");
 598                 break;
 599         case BTRFS_DEV_EXTENT_KEY:
 600                 printf("DEV_EXTENT");
 601                 break;
 602         case BTRFS_BALANCE_ITEM_KEY:
 603                 printf("BALANCE_ITEM");
 604                 break;
 605         case BTRFS_DEV_REPLACE_KEY:
 606                 printf("DEV_REPLACE_ITEM");
 607                 break;
 608         case BTRFS_STRING_ITEM_KEY:
 609                 printf("STRING_ITEM");
 610                 break;
 611         case BTRFS_QGROUP_STATUS_KEY:
 612                 printf("BTRFS_STATUS_KEY");
 613                 break;
 614         case BTRFS_QGROUP_RELATION_KEY:
 615                 printf("BTRFS_QGROUP_RELATION_KEY");
 616                 break;
 617         case BTRFS_QGROUP_INFO_KEY:
 618                 printf("BTRFS_QGROUP_INFO_KEY");
 619                 break;
 620         case BTRFS_QGROUP_LIMIT_KEY:
 621                 printf("BTRFS_QGROUP_LIMIT_KEY");
 622                 break;
 623         case BTRFS_DEV_STATS_KEY:
 624                 printf("DEV_STATS_ITEM");
 625                 break;
 626         case BTRFS_UUID_KEY_SUBVOL:
 627                 printf("BTRFS_UUID_KEY_SUBVOL");
 628                 break;
 629         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 630                 printf("BTRFS_UUID_KEY_RECEIVED_SUBVOL");
 631                 break;
 632         default:
 633                 printf("UNKNOWN.%d", type);
 634         };
 635 }
 636
 637 static void print_objectid(u64 objectid, u8 type)
 638 {
 639         switch (type) {
 640         case BTRFS_DEV_EXTENT_KEY:
 641                 printf("%llu", (unsigned long long)objectid); /* device id */
 642                 return;
 643         case BTRFS_QGROUP_RELATION_KEY:
 644                 printf("%llu/%llu", objectid >> 48,
 645                         objectid & ((1ll << 48) - 1));
 646                 return;
 647         case BTRFS_UUID_KEY_SUBVOL:
 648         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 649                 printf("0x%016llx", (unsigned long long)objectid);
 650                 return;
 651         }
 652
 653         switch (objectid) {
 654         case BTRFS_ROOT_TREE_OBJECTID:
 655                 if (type == BTRFS_DEV_ITEM_KEY)
 656                         printf("DEV_ITEMS");
 657                 else
 658                         printf("ROOT_TREE");
 659                 break;
 660         case BTRFS_EXTENT_TREE_OBJECTID:
 661                 printf("EXTENT_TREE");
 662                 break;
 663         case BTRFS_CHUNK_TREE_OBJECTID:
 664                 printf("CHUNK_TREE");
 665                 break;
 666         case BTRFS_DEV_TREE_OBJECTID:
 667                 printf("DEV_TREE");
 668                 break;
 669         case BTRFS_FS_TREE_OBJECTID:
 670                 printf("FS_TREE");
 671                 break;
 672         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 673                 printf("ROOT_TREE_DIR");
 674                 break;
 675         case BTRFS_CSUM_TREE_OBJECTID:
 676                 printf("CSUM_TREE");
 677                 break;
 678         case BTRFS_BALANCE_OBJECTID:
 679                 printf("BALANCE");
 680                 break;
 681         case BTRFS_ORPHAN_OBJECTID:
 682                 printf("ORPHAN");
 683                 break;
 684         case BTRFS_TREE_LOG_OBJECTID:
 685                 printf("TREE_LOG");
 686                 break;
 687         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 688                 printf("LOG_FIXUP");
 689                 break;
 690         case BTRFS_TREE_RELOC_OBJECTID:
 691                 printf("TREE_RELOC");
 692                 break;
 693         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 694                 printf("DATA_RELOC_TREE");
 695                 break;
 696         case BTRFS_EXTENT_CSUM_OBJECTID:
 697                 printf("EXTENT_CSUM");
 698                 break;
 699         case BTRFS_FREE_SPACE_OBJECTID:
 700                 printf("FREE_SPACE");
 701                 break;
 702         case BTRFS_FREE_INO_OBJECTID:
 703                 printf("FREE_INO");
 704                 break;
 705         case BTRFS_QUOTA_TREE_OBJECTID:
 706                 printf("QUOTA_TREE");
 707                 break;
 708         case BTRFS_UUID_TREE_OBJECTID:
 709                 printf("UUID_TREE");
 710                 break;
 711         case BTRFS_MULTIPLE_OBJECTIDS:
 712                 printf("MULTIPLE");
 713                 break;
 714         case (u64)-1:
 715                 printf("-1");
 716                 break;
 717         case BTRFS_FIRST_CHUNK_TREE_OBJECTID:
 718                 if (type == BTRFS_CHUNK_ITEM_KEY) {
 719                         printf("FIRST_CHUNK_TREE");
 720                         break;
 721                 }
 722                 /* fall-thru */
 723         default:
 724                 printf("%llu", (unsigned long long)objectid);
 725         }
 726 }
 727
 728 void btrfs_print_key(struct btrfs_disk_key *disk_key)
 729 {
 730         u64 objectid = btrfs_disk_key_objectid(disk_key);
 731         u8 type = btrfs_disk_key_type(disk_key);
 732         u64 offset = btrfs_disk_key_offset(disk_key);
 733
 734         printf("key (");
 735         print_objectid(objectid, type);
 736         printf(" ");
 737         print_key_type(objectid, type);
 738         switch (type) {
 739         case BTRFS_QGROUP_RELATION_KEY:
 740         case BTRFS_QGROUP_INFO_KEY:
 741         case BTRFS_QGROUP_LIMIT_KEY:
 742                 printf(" %llu/%llu)", (unsigned long long)(offset >> 48),
 743                         (unsigned long long)(offset & ((1ll << 48) - 1)));
 744                 break;
 745         case BTRFS_UUID_KEY_SUBVOL:
 746         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 747                 printf(" 0x%016llx)", (unsigned long long)offset);
 748                 break;
 749         default:
 750                 if (offset == (u64)-1)
 751                         printf(" -1)");
 752                 else
 753                         printf(" %llu)", (unsigned long long)offset);
 754                 break;
 755         }
 756 }
 757
 758 static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
 759                             u32 item_size)
 760 {
 761         if (item_size & (sizeof(u64) - 1)) {
 762                 printf("btrfs: uuid item with illegal size %lu!\n",
 763                        (unsigned long)item_size);
 764                 return;
 765         }
 766         while (item_size) {
 767                 __le64 subvol_id;
 768
 769                 read_extent_buffer(l, &subvol_id, offset, sizeof(u64));
 770                 printf("\t\tsubvol_id %llu\n",
 771                         (unsigned long long)le64_to_cpu(subvol_id));
 772                 item_size -= sizeof(u64);
 773                 offset += sizeof(u64);
 774         }
 775 }
 776
 777 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 778 {
 779         int i;
 780         char *str;
 781         struct btrfs_item *item;
 782         struct btrfs_dir_item *di;
 783         struct btrfs_inode_item *ii;
 784         struct btrfs_file_extent_item *fi;
 785         struct btrfs_block_group_item *bi;
 786         struct btrfs_extent_data_ref *dref;
 787         struct btrfs_shared_data_ref *sref;
 788         struct btrfs_inode_ref *iref;
 789         struct btrfs_inode_extref *iref2;
 790         struct btrfs_dev_extent *dev_extent;
 791         struct btrfs_disk_key disk_key;
 792         struct btrfs_block_group_item bg_item;
 793         struct btrfs_dir_log_item *dlog;
 794         struct btrfs_qgroup_info_item *qg_info;
 795         struct btrfs_qgroup_limit_item *qg_limit;
 796         struct btrfs_qgroup_status_item *qg_status;
 797         u32 nr = btrfs_header_nritems(l);
 798         u64 objectid;
 799         u32 type;
 800         char bg_flags_str[32];
 801
 802         printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
 803                 (unsigned long long)btrfs_header_bytenr(l), nr,
 804                 btrfs_leaf_free_space(root, l),
 805                 (unsigned long long)btrfs_header_generation(l),
 806                 (unsigned long long)btrfs_header_owner(l));
 807         print_uuids(l);
 808         fflush(stdout);
 809         for (i = 0 ; i < nr ; i++) {
 810                 item = btrfs_item_nr(i);
 811                 btrfs_item_key(l, &disk_key, i);
 812                 objectid = btrfs_disk_key_objectid(&disk_key);
 813                 type = btrfs_disk_key_type(&disk_key);
 814                 printf("\titem %d ", i);
 815                 btrfs_print_key(&disk_key);
 816                 printf(" itemoff %d itemsize %d\n",
 817                         btrfs_item_offset(l, item),
 818                         btrfs_item_size(l, item));
 819
 820                 if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID)
 821                         print_free_space_header(l, i);
 822
 823                 switch (type) {
 824                 case BTRFS_INODE_ITEM_KEY:
 825                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
 826                         printf("\t\tinode generation %llu transid %llu size %llu block group %llu mode %o links %u uid %u gid %u rdev %llu flags 0x%llx\n",
 827                                (unsigned long long)btrfs_inode_generation(l, ii),
 828                                (unsigned long long)btrfs_inode_transid(l, ii),
 829                                (unsigned long long)btrfs_inode_size(l, ii),
 830                                (unsigned long long)btrfs_inode_block_group(l,ii),
 831                                btrfs_inode_mode(l, ii),
 832                                btrfs_inode_nlink(l, ii),
 833                                btrfs_inode_uid(l, ii),
 834                                btrfs_inode_gid(l, ii),
 835                                (unsigned long long)btrfs_inode_rdev(l,ii),
 836                                (unsigned long long)btrfs_inode_flags(l,ii));
 837                         break;
 838                 case BTRFS_INODE_REF_KEY:
 839                         iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
 840                         print_inode_ref_item(l, item, iref);
 841                         break;
 842                 case BTRFS_INODE_EXTREF_KEY:
 843                         iref2 = btrfs_item_ptr(l, i, struct btrfs_inode_extref);
 844                         print_inode_extref_item(l, item, iref2);
 845                         break;
 846                 case BTRFS_DIR_ITEM_KEY:
 847                 case BTRFS_DIR_INDEX_KEY:
 848                 case BTRFS_XATTR_ITEM_KEY:
 849                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 850                         print_dir_item(l, item, di);
 851                         break;
 852                 case BTRFS_DIR_LOG_INDEX_KEY:
 853                 case BTRFS_DIR_LOG_ITEM_KEY:
 854                         dlog = btrfs_item_ptr(l, i, struct btrfs_dir_log_item);
 855                         printf("\t\tdir log end %Lu\n",
 856                                (unsigned long long)btrfs_dir_log_end(l, dlog));
 857                        break;
 858                 case BTRFS_ORPHAN_ITEM_KEY:
 859                         printf("\t\torphan item\n");
 860                         break;
 861                 case BTRFS_ROOT_ITEM_KEY:
 862                         print_root(l, i);
 863                         break;
 864                 case BTRFS_ROOT_REF_KEY:
 865                         print_root_ref(l, i, "ref");
 866                         break;
 867                 case BTRFS_ROOT_BACKREF_KEY:
 868                         print_root_ref(l, i, "backref");
 869                         break;
 870                 case BTRFS_EXTENT_ITEM_KEY:
 871                         print_extent_item(l, i, 0);
 872                         break;
 873                 case BTRFS_METADATA_ITEM_KEY:
 874                         print_extent_item(l, i, 1);
 875                         break;
 876                 case BTRFS_TREE_BLOCK_REF_KEY:
 877                         printf("\t\ttree block backref\n");
 878                         break;
 879                 case BTRFS_SHARED_BLOCK_REF_KEY:
 880                         printf("\t\tshared block backref\n");
 881                         break;
 882                 case BTRFS_EXTENT_DATA_REF_KEY:
 883                         dref = btrfs_item_ptr(l, i, struct btrfs_extent_data_ref);
 884                         printf("\t\textent data backref root %llu "
 885                                "objectid %llu offset %llu count %u\n",
 886                                (unsigned long long)btrfs_extent_data_ref_root(l, dref),
 887                                (unsigned long long)btrfs_extent_data_ref_objectid(l, dref),
 888                                (unsigned long long)btrfs_extent_data_ref_offset(l, dref),
 889                                btrfs_extent_data_ref_count(l, dref));
 890                         break;
 891                 case BTRFS_SHARED_DATA_REF_KEY:
 892                         sref = btrfs_item_ptr(l, i, struct btrfs_shared_data_ref);
 893                         printf("\t\tshared data backref count %u\n",
 894                                btrfs_shared_data_ref_count(l, sref));
 895                         break;
 896                 case BTRFS_EXTENT_REF_V0_KEY:
 897 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 898                         print_extent_ref_v0(l, i);
 899 #else
 900                         BUG();
 901 #endif
 902                         break;
 903                 case BTRFS_CSUM_ITEM_KEY:
 904                         printf("\t\tcsum item\n");
 905                         break;
 906                 case BTRFS_EXTENT_CSUM_KEY:
 907                         printf("\t\textent csum item\n");
 908                         break;
 909                 case BTRFS_EXTENT_DATA_KEY:
 910                         fi = btrfs_item_ptr(l, i,
 911                                             struct btrfs_file_extent_item);
 912                         print_file_extent_item(l, item, i, fi);
 913                         break;
 914                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 915                         bi = btrfs_item_ptr(l, i,
 916                                             struct btrfs_block_group_item);
 917                         read_extent_buffer(l, &bg_item, (unsigned long)bi,
 918                                            sizeof(bg_item));
 919                         memset(bg_flags_str, 0, sizeof(bg_flags_str));
 920                         bg_flags_to_str(btrfs_block_group_flags(&bg_item),
 921                                         bg_flags_str);
 922                         printf("\t\tblock group used %llu chunk_objectid %llu flags %s\n",
 923                                (unsigned long long)btrfs_block_group_used(&bg_item),
 924                                (unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
 925                                bg_flags_str);
 926                         break;
 927                 case BTRFS_CHUNK_ITEM_KEY:
 928                         print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
 929                         break;
 930                 case BTRFS_DEV_ITEM_KEY:
 931                         print_dev_item(l, btrfs_item_ptr(l, i,
 932                                         struct btrfs_dev_item));
 933                         break;
 934                 case BTRFS_DEV_EXTENT_KEY:
 935                         dev_extent = btrfs_item_ptr(l, i,
 936                                                     struct btrfs_dev_extent);
 937                         printf("\t\tdev extent chunk_tree %llu\n"
 938                                "\t\tchunk objectid %llu chunk offset %llu "
 939                                "length %llu\n",
 940                                (unsigned long long)
 941                                btrfs_dev_extent_chunk_tree(l, dev_extent),
 942                                (unsigned long long)
 943                                btrfs_dev_extent_chunk_objectid(l, dev_extent),
 944                                (unsigned long long)
 945                                btrfs_dev_extent_chunk_offset(l, dev_extent),
 946                                (unsigned long long)
 947                                btrfs_dev_extent_length(l, dev_extent));
 948                         break;
 949                 case BTRFS_QGROUP_STATUS_KEY:
 950                         qg_status = btrfs_item_ptr(l, i,
 951                                         struct btrfs_qgroup_status_item);
 952                         printf("\t\tversion %llu generation %llu flags %#llx "
 953                                 "scan %lld\n",
 954                                 (unsigned long long)
 955                                 btrfs_qgroup_status_version(l, qg_status),
 956                                 (unsigned long long)
 957                                 btrfs_qgroup_status_generation(l, qg_status),
 958                                 (unsigned long long)
 959                                 btrfs_qgroup_status_flags(l, qg_status),
 960                                 (unsigned long long)
 961                                 btrfs_qgroup_status_scan(l, qg_status));
 962                         break;
 963                 case BTRFS_QGROUP_RELATION_KEY:
 964                         break;
 965                 case BTRFS_QGROUP_INFO_KEY:
 966                         qg_info = btrfs_item_ptr(l, i,
 967                                                  struct btrfs_qgroup_info_item);
 968                         printf("\t\tgeneration %llu\n"
 969                              "\t\treferenced %llu referenced compressed %llu\n"
 970                              "\t\texclusive %llu exclusive compressed %llu\n",
 971                                (unsigned long long)
 972                                btrfs_qgroup_info_generation(l, qg_info),
 973                                (unsigned long long)
 974                                btrfs_qgroup_info_referenced(l, qg_info),
 975                                (unsigned long long)
 976                                btrfs_qgroup_info_referenced_compressed(l,
 977                                                                        qg_info),
 978                                (unsigned long long)
 979                                btrfs_qgroup_info_exclusive(l, qg_info),
 980                                (unsigned long long)
 981                                btrfs_qgroup_info_exclusive_compressed(l,
 982                                                                       qg_info));
 983                         break;
 984                 case BTRFS_QGROUP_LIMIT_KEY:
 985                         qg_limit = btrfs_item_ptr(l, i,
 986                                          struct btrfs_qgroup_limit_item);
 987                         printf("\t\tflags %llx\n"
 988                              "\t\tmax referenced %lld max exclusive %lld\n"
 989                              "\t\trsv referenced %lld rsv exclusive %lld\n",
 990                                (unsigned long long)
 991                                btrfs_qgroup_limit_flags(l, qg_limit),
 992                                (long long)
 993                                btrfs_qgroup_limit_max_referenced(l, qg_limit),
 994                                (long long)
 995                                btrfs_qgroup_limit_max_exclusive(l, qg_limit),
 996                                (long long)
 997                                btrfs_qgroup_limit_rsv_referenced(l, qg_limit),
 998                                (long long)
 999                                btrfs_qgroup_limit_rsv_exclusive(l, qg_limit));
1000                         break;
1001                 case BTRFS_UUID_KEY_SUBVOL:
1002                 case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
1003                         print_uuid_item(l, btrfs_item_ptr_offset(l, i),
1004                                         btrfs_item_size_nr(l, i));
1005                         break;
1006                 case BTRFS_STRING_ITEM_KEY:
1007                         /* dirty, but it's simple */
1008                         str = l->data + btrfs_item_ptr_offset(l, i);
1009                         printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
1010                         break;
1011                 case BTRFS_DEV_STATS_KEY:
1012                         printf("\t\tdevice stats\n");
1013                         break;
1014                 };
1015                 fflush(stdout);
1016         }
1017 }
1018
1019 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb, int follow)
1020 {
1021         int i;
1022         u32 nr;
1023         u32 size;
1024         struct btrfs_disk_key disk_key;
1025         struct btrfs_key key;
1026
1027         if (!eb)
1028                 return;
1029         nr = btrfs_header_nritems(eb);
1030         if (btrfs_is_leaf(eb)) {
1031                 btrfs_print_leaf(root, eb);
1032                 return;
1033         }
1034         printf("node %llu level %d items %d free %u generation %llu owner %llu\n",
1035                (unsigned long long)eb->start,
1036                 btrfs_header_level(eb), nr,
1037                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
1038                 (unsigned long long)btrfs_header_generation(eb),
1039                 (unsigned long long)btrfs_header_owner(eb));
1040         print_uuids(eb);
1041         fflush(stdout);
1042         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
1043         for (i = 0; i < nr; i++) {
1044                 u64 blocknr = btrfs_node_blockptr(eb, i);
1045                 btrfs_node_key(eb, &disk_key, i);
1046                 btrfs_disk_key_to_cpu(&key, &disk_key);
1047                 printf("\t");
1048                 btrfs_print_key(&disk_key);
1049                 printf(" block %llu (%llu) gen %llu\n",
1050                        (unsigned long long)blocknr,
1051                        (unsigned long long)blocknr / size,
1052                        (unsigned long long)btrfs_node_ptr_generation(eb, i));
1053                 fflush(stdout);
1054         }
1055         if (!follow)
1056                 return;
1057
1058         for (i = 0; i < nr; i++) {
1059                 struct extent_buffer *next = read_tree_block(root,
1060                                              btrfs_node_blockptr(eb, i),
1061                                              size,
1062                                              btrfs_node_ptr_generation(eb, i));
1063                 if (!next) {
1064                         fprintf(stderr, "failed to read %llu in tree %llu\n",
1065                                 (unsigned long long)btrfs_node_blockptr(eb, i),
1066                                 (unsigned long long)btrfs_header_owner(eb));
1067                         continue;
1068                 }
1069                 if (btrfs_is_leaf(next) &&
1070                     btrfs_header_level(eb) != 1)
1071                         BUG();
1072                 if (btrfs_header_level(next) !=
1073                         btrfs_header_level(eb) - 1)
1074                         BUG();
1075                 btrfs_print_tree(root, next, 1);
1076                 free_extent_buffer(next);
1077         }
1078 }