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         static const char* dir_item_str[] = {
  35                 [BTRFS_FT_REG_FILE]     = "FILE",
  36                 [BTRFS_FT_DIR]          = "DIR",
  37                 [BTRFS_FT_CHRDEV]       = "CHRDEV",
  38                 [BTRFS_FT_BLKDEV]       = "BLKDEV",
  39                 [BTRFS_FT_FIFO]         = "FIFO",
  40                 [BTRFS_FT_SOCK]         = "SOCK",
  41                 [BTRFS_FT_SYMLINK]      = "SYMLINK",
  42                 [BTRFS_FT_XATTR]        = "XATTR"
  43         };
  44
  45         if (type < ARRAY_SIZE(dir_item_str) && dir_item_str[type])
  46                 printf("%s", dir_item_str[type]);
  47         else
  48                 printf("DIR_ITEM.%u", type);
  49 }
  50
  51 static void print_dir_item(struct extent_buffer *eb, u32 size,
  52                           struct btrfs_dir_item *di)
  53 {
  54         u32 cur = 0;
  55         u32 len;
  56         u32 name_len;
  57         u32 data_len;
  58         char namebuf[BTRFS_NAME_LEN];
  59         struct btrfs_disk_key location;
  60
  61         while (cur < size) {
  62                 btrfs_dir_item_key(eb, di, &location);
  63                 printf("\t\tlocation ");
  64                 btrfs_print_key(&location);
  65                 printf(" type ");
  66                 print_dir_item_type(eb, di);
  67                 printf("\n");
  68                 name_len = btrfs_dir_name_len(eb, di);
  69                 data_len = btrfs_dir_data_len(eb, di);
  70                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
  71                 read_extent_buffer(eb, namebuf, (unsigned long)(di + 1), len);
  72                 printf("\t\ttransid %llu data_len %u name_len %u\n",
  73                                 btrfs_dir_transid(eb, di),
  74                                 data_len, name_len);
  75                 printf("\t\tname: %.*s\n", len, namebuf);
  76                 if (data_len) {
  77                         len = (data_len <= sizeof(namebuf))? data_len: sizeof(namebuf);
  78                         read_extent_buffer(eb, namebuf,
  79                                 (unsigned long)(di + 1) + name_len, len);
  80                         printf("\t\tdata %.*s\n", len, namebuf);
  81                 }
  82                 len = sizeof(*di) + name_len + data_len;
  83                 di = (struct btrfs_dir_item *)((char *)di + len);
  84                 cur += len;
  85         }
  86 }
  87
  88 static void print_inode_extref_item(struct extent_buffer *eb, u32 size,
  89                 struct btrfs_inode_extref *extref)
  90 {
  91         u32 cur = 0;
  92         u32 len;
  93         u32 name_len = 0;
  94         u64 index = 0;
  95         u64 parent_objid;
  96         char namebuf[BTRFS_NAME_LEN];
  97
  98         while (cur < size) {
  99                 index = btrfs_inode_extref_index(eb, extref);
 100                 name_len = btrfs_inode_extref_name_len(eb, extref);
 101                 parent_objid = btrfs_inode_extref_parent(eb, extref);
 102
 103                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
 104
 105                 read_extent_buffer(eb, namebuf, (unsigned long)(extref->name), len);
 106
 107                 printf("\t\tinode extref index %llu parent %llu namelen %u "
 108                        "name: %.*s\n",
 109                        (unsigned long long)index,
 110                        (unsigned long long)parent_objid,
 111                        name_len, len, namebuf);
 112
 113                 len = sizeof(*extref) + name_len;
 114                 extref = (struct btrfs_inode_extref *)((char *)extref + len);
 115                 cur += len;
 116         }
 117 }
 118
 119 static void print_inode_ref_item(struct extent_buffer *eb, u32 size,
 120                                 struct btrfs_inode_ref *ref)
 121 {
 122         u32 cur = 0;
 123         u32 len;
 124         u32 name_len;
 125         u64 index;
 126         char namebuf[BTRFS_NAME_LEN];
 127
 128         while (cur < size) {
 129                 name_len = btrfs_inode_ref_name_len(eb, ref);
 130                 index = btrfs_inode_ref_index(eb, ref);
 131                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
 132                 read_extent_buffer(eb, namebuf, (unsigned long)(ref + 1), len);
 133                 printf("\t\tinode ref index %llu namelen %u name: %.*s\n",
 134                        (unsigned long long)index, name_len, len, namebuf);
 135                 len = sizeof(*ref) + name_len;
 136                 ref = (struct btrfs_inode_ref *)((char *)ref + len);
 137                 cur += len;
 138         }
 139 }
 140
 141 /* Caller should ensure sizeof(*ret)>=21 "DATA|METADATA|RAID10" */
 142 static void bg_flags_to_str(u64 flags, char *ret)
 143 {
 144         int empty = 1;
 145
 146         if (flags & BTRFS_BLOCK_GROUP_DATA) {
 147                 empty = 0;
 148                 strcpy(ret, "DATA");
 149         }
 150         if (flags & BTRFS_BLOCK_GROUP_METADATA) {
 151                 if (!empty)
 152                         strcat(ret, "|");
 153                 strcat(ret, "METADATA");
 154         }
 155         if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
 156                 if (!empty)
 157                         strcat(ret, "|");
 158                 strcat(ret, "SYSTEM");
 159         }
 160         switch (flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
 161         case BTRFS_BLOCK_GROUP_RAID0:
 162                 strcat(ret, "|RAID0");
 163                 break;
 164         case BTRFS_BLOCK_GROUP_RAID1:
 165                 strcat(ret, "|RAID1");
 166                 break;
 167         case BTRFS_BLOCK_GROUP_DUP:
 168                 strcat(ret, "|DUP");
 169                 break;
 170         case BTRFS_BLOCK_GROUP_RAID10:
 171                 strcat(ret, "|RAID10");
 172                 break;
 173         case BTRFS_BLOCK_GROUP_RAID5:
 174                 strcat(ret, "|RAID5");
 175                 break;
 176         case BTRFS_BLOCK_GROUP_RAID6:
 177                 strcat(ret, "|RAID6");
 178                 break;
 179         default:
 180                 break;
 181         }
 182 }
 183
 184 /* Caller should ensure sizeof(*ret)>= 26 "OFF|SCANNING|INCONSISTENT" */
 185 static void qgroup_flags_to_str(u64 flags, char *ret)
 186 {
 187         if (flags & BTRFS_QGROUP_STATUS_FLAG_ON)
 188                 strcpy(ret, "ON");
 189         else
 190                 strcpy(ret, "OFF");
 191
 192         if (flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN)
 193                 strcat(ret, "|SCANNING");
 194         if (flags & BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT)
 195                 strcat(ret, "|INCONSISTENT");
 196 }
 197
 198 void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
 199 {
 200         u16 num_stripes = btrfs_chunk_num_stripes(eb, chunk);
 201         int i;
 202         u32 chunk_item_size = btrfs_chunk_item_size(num_stripes);
 203         char chunk_flags_str[32] = {0};
 204
 205         if ((unsigned long)chunk + chunk_item_size > eb->len) {
 206                 printf("\t\tchunk item invalid\n");
 207                 return;
 208         }
 209
 210         bg_flags_to_str(btrfs_chunk_type(eb, chunk), chunk_flags_str);
 211         printf("\t\tlength %llu owner %llu stripe_len %llu type %s\n",
 212                (unsigned long long)btrfs_chunk_length(eb, chunk),
 213                (unsigned long long)btrfs_chunk_owner(eb, chunk),
 214                (unsigned long long)btrfs_chunk_stripe_len(eb, chunk),
 215                 chunk_flags_str);
 216         printf("\t\tio_align %u io_width %u sector_size %u\n",
 217                         btrfs_chunk_io_align(eb, chunk),
 218                         btrfs_chunk_io_width(eb, chunk),
 219                         btrfs_chunk_sector_size(eb, chunk));
 220         printf("\t\tnum_stripes %hu sub_stripes %hu\n", num_stripes,
 221                         btrfs_chunk_sub_stripes(eb, chunk));
 222         for (i = 0 ; i < num_stripes ; i++) {
 223                 unsigned char dev_uuid[BTRFS_UUID_SIZE];
 224                 char str_dev_uuid[BTRFS_UUID_UNPARSED_SIZE];
 225                 u64 uuid_offset;
 226                 u64 stripe_offset;
 227
 228                 uuid_offset = (unsigned long)btrfs_stripe_dev_uuid_nr(chunk, i);
 229                 stripe_offset = (unsigned long)btrfs_stripe_nr(chunk, i);
 230
 231                 if (uuid_offset < stripe_offset ||
 232                         (uuid_offset + BTRFS_UUID_SIZE) >
 233                                 (stripe_offset + sizeof(struct btrfs_stripe))) {
 234                         printf("\t\t\tstripe %d invalid\n", i);
 235                         break;
 236                 }
 237
 238                 read_extent_buffer(eb, dev_uuid,
 239                         uuid_offset,
 240                         BTRFS_UUID_SIZE);
 241                 uuid_unparse(dev_uuid, str_dev_uuid);
 242                 printf("\t\t\tstripe %d devid %llu offset %llu\n", i,
 243                       (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
 244                       (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
 245                 printf("\t\t\tdev_uuid %s\n", str_dev_uuid);
 246         }
 247 }
 248
 249 static void print_dev_item(struct extent_buffer *eb,
 250                            struct btrfs_dev_item *dev_item)
 251 {
 252         char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
 253         char fsid_str[BTRFS_UUID_UNPARSED_SIZE];
 254         u8 uuid[BTRFS_UUID_SIZE];
 255         u8 fsid[BTRFS_UUID_SIZE];
 256
 257         read_extent_buffer(eb, uuid,
 258                            (unsigned long)btrfs_device_uuid(dev_item),
 259                            BTRFS_UUID_SIZE);
 260         uuid_unparse(uuid, uuid_str);
 261         read_extent_buffer(eb, fsid,
 262                            (unsigned long)btrfs_device_fsid(dev_item),
 263                            BTRFS_UUID_SIZE);
 264         uuid_unparse(fsid, fsid_str);
 265         printf("\t\tdevid %llu total_bytes %llu bytes_used %Lu\n"
 266                "\t\tio_align %u io_width %u sector_size %u type %llu\n"
 267                "\t\tgeneration %llu start_offset %llu dev_group %u\n"
 268                "\t\tseek_speed %hhu bandwidth %hhu\n"
 269                "\t\tuuid %s\n"
 270                "\t\tfsid %s\n",
 271                (unsigned long long)btrfs_device_id(eb, dev_item),
 272                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
 273                (unsigned long long)btrfs_device_bytes_used(eb, dev_item),
 274                btrfs_device_io_align(eb, dev_item),
 275                btrfs_device_io_width(eb, dev_item),
 276                btrfs_device_sector_size(eb, dev_item),
 277                (unsigned long long)btrfs_device_type(eb, dev_item),
 278                (unsigned long long)btrfs_device_generation(eb, dev_item),
 279                (unsigned long long)btrfs_device_start_offset(eb, dev_item),
 280                btrfs_device_group(eb, dev_item),
 281                btrfs_device_seek_speed(eb, dev_item),
 282                btrfs_device_bandwidth(eb, dev_item),
 283                uuid_str, fsid_str);
 284 }
 285
 286 static void print_uuids(struct extent_buffer *eb)
 287 {
 288         char fs_uuid[BTRFS_UUID_UNPARSED_SIZE];
 289         char chunk_uuid[BTRFS_UUID_UNPARSED_SIZE];
 290         u8 disk_uuid[BTRFS_UUID_SIZE];
 291
 292         read_extent_buffer(eb, disk_uuid, btrfs_header_fsid(),
 293                            BTRFS_FSID_SIZE);
 294
 295         fs_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 296         uuid_unparse(disk_uuid, fs_uuid);
 297
 298         read_extent_buffer(eb, disk_uuid,
 299                            btrfs_header_chunk_tree_uuid(eb),
 300                            BTRFS_UUID_SIZE);
 301
 302         chunk_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 303         uuid_unparse(disk_uuid, chunk_uuid);
 304         printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
 305 }
 306
 307 static void compress_type_to_str(u8 compress_type, char *ret)
 308 {
 309         switch (compress_type) {
 310         case BTRFS_COMPRESS_NONE:
 311                 strcpy(ret, "none");
 312                 break;
 313         case BTRFS_COMPRESS_ZLIB:
 314                 strcpy(ret, "zlib");
 315                 break;
 316         case BTRFS_COMPRESS_LZO:
 317                 strcpy(ret, "lzo");
 318                 break;
 319         default:
 320                 sprintf(ret, "UNKNOWN.%d", compress_type);
 321         }
 322 }
 323
 324 static const char* file_extent_type_to_str(u8 type)
 325 {
 326         switch (type) {
 327         case BTRFS_FILE_EXTENT_INLINE: return "inline";
 328         case BTRFS_FILE_EXTENT_PREALLOC: return "prealloc";
 329         case BTRFS_FILE_EXTENT_REG: return "regular";
 330         default: return "unknown";
 331         }
 332 }
 333
 334 static void print_file_extent_item(struct extent_buffer *eb,
 335                                    struct btrfs_item *item,
 336                                    int slot,
 337                                    struct btrfs_file_extent_item *fi)
 338 {
 339         unsigned char extent_type = btrfs_file_extent_type(eb, fi);
 340         char compress_str[16];
 341
 342         compress_type_to_str(btrfs_file_extent_compression(eb, fi),
 343                              compress_str);
 344
 345         printf("\t\tgeneration %llu type %hhu (%s)\n",
 346                         btrfs_file_extent_generation(eb, fi),
 347                         extent_type, file_extent_type_to_str(extent_type));
 348
 349         if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 350                 printf("\t\tinline extent data size %u ram_bytes %u compression %hhu (%s)\n",
 351                                 btrfs_file_extent_inline_item_len(eb, item),
 352                                 btrfs_file_extent_inline_len(eb, slot, fi),
 353                                 btrfs_file_extent_compression(eb, fi),
 354                                 compress_str);
 355                 return;
 356         }
 357         if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
 358                 printf("\t\tprealloc data disk byte %llu nr %llu\n",
 359                   (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 360                   (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 361                 printf("\t\tprealloc data offset %llu nr %llu\n",
 362                   (unsigned long long)btrfs_file_extent_offset(eb, fi),
 363                   (unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
 364                 return;
 365         }
 366         printf("\t\textent data disk byte %llu nr %llu\n",
 367                 (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 368                 (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 369         printf("\t\textent data offset %llu nr %llu ram %llu\n",
 370                 (unsigned long long)btrfs_file_extent_offset(eb, fi),
 371                 (unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
 372                 (unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
 373         printf("\t\textent compression %hhu (%s)\n",
 374                         btrfs_file_extent_compression(eb, fi),
 375                         compress_str);
 376 }
 377
 378 /* Caller should ensure sizeof(*ret) >= 16("DATA|TREE_BLOCK") */
 379 static void extent_flags_to_str(u64 flags, char *ret)
 380 {
 381         int empty = 1;
 382
 383         if (flags & BTRFS_EXTENT_FLAG_DATA) {
 384                 empty = 0;
 385                 strcpy(ret, "DATA");
 386         }
 387         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
 388                 if (!empty) {
 389                         empty = 0;
 390                         strcat(ret, "|");
 391                 }
 392                 strcat(ret, "TREE_BLOCK");
 393         }
 394         if (flags & BTRFS_BLOCK_FLAG_FULL_BACKREF) {
 395                 strcat(ret, "|");
 396                 strcat(ret, "FULL_BACKREF");
 397         }
 398 }
 399
 400 void print_extent_item(struct extent_buffer *eb, int slot, int metadata)
 401 {
 402         struct btrfs_extent_item *ei;
 403         struct btrfs_extent_inline_ref *iref;
 404         struct btrfs_extent_data_ref *dref;
 405         struct btrfs_shared_data_ref *sref;
 406         struct btrfs_disk_key key;
 407         unsigned long end;
 408         unsigned long ptr;
 409         int type;
 410         u32 item_size = btrfs_item_size_nr(eb, slot);
 411         u64 flags;
 412         u64 offset;
 413         char flags_str[32] = {0};
 414
 415         if (item_size < sizeof(*ei)) {
 416 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 417                 struct btrfs_extent_item_v0 *ei0;
 418                 BUG_ON(item_size != sizeof(*ei0));
 419                 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
 420                 printf("\t\textent refs %u\n",
 421                        btrfs_extent_refs_v0(eb, ei0));
 422                 return;
 423 #else
 424                 BUG();
 425 #endif
 426         }
 427
 428         ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
 429         flags = btrfs_extent_flags(eb, ei);
 430         extent_flags_to_str(flags, flags_str);
 431
 432         printf("\t\textent refs %llu gen %llu flags %s\n",
 433                (unsigned long long)btrfs_extent_refs(eb, ei),
 434                (unsigned long long)btrfs_extent_generation(eb, ei),
 435                flags_str);
 436
 437         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK && !metadata) {
 438                 struct btrfs_tree_block_info *info;
 439                 info = (struct btrfs_tree_block_info *)(ei + 1);
 440                 btrfs_tree_block_key(eb, info, &key);
 441                 printf("\t\ttree block ");
 442                 btrfs_print_key(&key);
 443                 printf(" level %d\n", btrfs_tree_block_level(eb, info));
 444                 iref = (struct btrfs_extent_inline_ref *)(info + 1);
 445         } else if (metadata) {
 446                 struct btrfs_key tmp;
 447
 448                 btrfs_item_key_to_cpu(eb, &tmp, slot);
 449                 printf("\t\ttree block skinny level %d\n", (int)tmp.offset);
 450                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 451         } else{
 452                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 453         }
 454
 455         ptr = (unsigned long)iref;
 456         end = (unsigned long)ei + item_size;
 457         while (ptr < end) {
 458                 iref = (struct btrfs_extent_inline_ref *)ptr;
 459                 type = btrfs_extent_inline_ref_type(eb, iref);
 460                 offset = btrfs_extent_inline_ref_offset(eb, iref);
 461                 switch (type) {
 462                 case BTRFS_TREE_BLOCK_REF_KEY:
 463                         printf("\t\ttree block backref root %llu\n",
 464                                (unsigned long long)offset);
 465                         break;
 466                 case BTRFS_SHARED_BLOCK_REF_KEY:
 467                         printf("\t\tshared block backref parent %llu\n",
 468                                (unsigned long long)offset);
 469                         break;
 470                 case BTRFS_EXTENT_DATA_REF_KEY:
 471                         dref = (struct btrfs_extent_data_ref *)(&iref->offset);
 472                         printf("\t\textent data backref root %llu "
 473                                "objectid %llu offset %llu count %u\n",
 474                                (unsigned long long)btrfs_extent_data_ref_root(eb, dref),
 475                                (unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
 476                                (unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
 477                                btrfs_extent_data_ref_count(eb, dref));
 478                         break;
 479                 case BTRFS_SHARED_DATA_REF_KEY:
 480                         sref = (struct btrfs_shared_data_ref *)(iref + 1);
 481                         printf("\t\tshared data backref parent %llu count %u\n",
 482                                (unsigned long long)offset,
 483                                btrfs_shared_data_ref_count(eb, sref));
 484                         break;
 485                 default:
 486                         return;
 487                 }
 488                 ptr += btrfs_extent_inline_ref_size(type);
 489         }
 490         WARN_ON(ptr > end);
 491 }
 492
 493 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 494 static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
 495 {
 496         struct btrfs_extent_ref_v0 *ref0;
 497
 498         ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
 499         printf("\t\textent back ref root %llu gen %llu "
 500                 "owner %llu num_refs %lu\n",
 501                 (unsigned long long)btrfs_ref_root_v0(eb, ref0),
 502                 (unsigned long long)btrfs_ref_generation_v0(eb, ref0),
 503                 (unsigned long long)btrfs_ref_objectid_v0(eb, ref0),
 504                 (unsigned long)btrfs_ref_count_v0(eb, ref0));
 505 }
 506 #endif
 507
 508 static void print_root_ref(struct extent_buffer *leaf, int slot, const char *tag)
 509 {
 510         struct btrfs_root_ref *ref;
 511         char namebuf[BTRFS_NAME_LEN];
 512         int namelen;
 513
 514         ref = btrfs_item_ptr(leaf, slot, struct btrfs_root_ref);
 515         namelen = btrfs_root_ref_name_len(leaf, ref);
 516         read_extent_buffer(leaf, namebuf, (unsigned long)(ref + 1), namelen);
 517         printf("\t\troot %s key dirid %llu sequence %llu name %.*s\n", tag,
 518                (unsigned long long)btrfs_root_ref_dirid(leaf, ref),
 519                (unsigned long long)btrfs_root_ref_sequence(leaf, ref),
 520                namelen, namebuf);
 521 }
 522
 523 static int empty_uuid(const u8 *uuid)
 524 {
 525         int i;
 526
 527         for (i = 0; i < BTRFS_UUID_SIZE; i++)
 528                 if (uuid[i])
 529                         return 0;
 530         return 1;
 531 }
 532
 533 /*
 534  * Caller must ensure sizeof(*ret) >= 7 "RDONLY"
 535  */
 536 static void root_flags_to_str(u64 flags, char *ret)
 537 {
 538         if (flags & BTRFS_ROOT_SUBVOL_RDONLY)
 539                 strcat(ret, "RDONLY");
 540         else
 541                 strcat(ret, "none");
 542 }
 543
 544 static void print_root(struct extent_buffer *leaf, int slot)
 545 {
 546         struct btrfs_root_item *ri;
 547         struct btrfs_root_item root_item;
 548         int len;
 549         char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
 550         char flags_str[32] = {0};
 551         struct btrfs_key drop_key;
 552
 553         ri = btrfs_item_ptr(leaf, slot, struct btrfs_root_item);
 554         len = btrfs_item_size_nr(leaf, slot);
 555
 556         memset(&root_item, 0, sizeof(root_item));
 557         read_extent_buffer(leaf, &root_item, (unsigned long)ri, len);
 558         root_flags_to_str(btrfs_root_flags(&root_item), flags_str);
 559
 560         printf("\t\tgeneration %llu root_dirid %llu bytenr %llu level %hhu refs %u\n",
 561                 (unsigned long long)btrfs_root_generation(&root_item),
 562                 (unsigned long long)btrfs_root_dirid(&root_item),
 563                 (unsigned long long)btrfs_root_bytenr(&root_item),
 564                 btrfs_root_level(&root_item),
 565                 btrfs_root_refs(&root_item));
 566         printf("\t\tlastsnap %llu byte_limit %llu bytes_used %llu flags 0x%llx(%s)\n",
 567                 (unsigned long long)btrfs_root_last_snapshot(&root_item),
 568                 (unsigned long long)btrfs_root_limit(&root_item),
 569                 (unsigned long long)btrfs_root_used(&root_item),
 570                 (unsigned long long)btrfs_root_flags(&root_item),
 571                 flags_str);
 572
 573         if (root_item.generation == root_item.generation_v2) {
 574                 uuid_unparse(root_item.uuid, uuid_str);
 575                 printf("\t\tuuid %s\n", uuid_str);
 576                 if (!empty_uuid(root_item.parent_uuid)) {
 577                         uuid_unparse(root_item.parent_uuid, uuid_str);
 578                         printf("\t\tparent_uuid %s\n", uuid_str);
 579                 }
 580                 if (!empty_uuid(root_item.received_uuid)) {
 581                         uuid_unparse(root_item.received_uuid, uuid_str);
 582                         printf("\t\treceived_uuid %s\n", uuid_str);
 583                 }
 584                 if (root_item.ctransid) {
 585                         printf("\t\tctransid %llu otransid %llu stransid %llu rtransid %llu\n",
 586                                 btrfs_root_ctransid(&root_item),
 587                                 btrfs_root_otransid(&root_item),
 588                                 btrfs_root_stransid(&root_item),
 589                                 btrfs_root_rtransid(&root_item));
 590                 }
 591         }
 592
 593         btrfs_disk_key_to_cpu(&drop_key, &root_item.drop_progress);
 594         printf("\t\tdrop ");
 595         btrfs_print_key(&root_item.drop_progress);
 596         printf(" level %hhu\n", root_item.drop_level);
 597 }
 598
 599 static void print_free_space_header(struct extent_buffer *leaf, int slot)
 600 {
 601         struct btrfs_free_space_header *header;
 602         struct btrfs_disk_key location;
 603
 604         header = btrfs_item_ptr(leaf, slot, struct btrfs_free_space_header);
 605         btrfs_free_space_key(leaf, header, &location);
 606         printf("\t\tlocation ");
 607         btrfs_print_key(&location);
 608         printf("\n");
 609         printf("\t\tcache generation %llu entries %llu bitmaps %llu\n",
 610                (unsigned long long)btrfs_free_space_generation(leaf, header),
 611                (unsigned long long)btrfs_free_space_entries(leaf, header),
 612                (unsigned long long)btrfs_free_space_bitmaps(leaf, header));
 613 }
 614
 615 void print_key_type(FILE *stream, u64 objectid, u8 type)
 616 {
 617         static const char* key_to_str[256] = {
 618                 [BTRFS_INODE_ITEM_KEY]          = "INODE_ITEM",
 619                 [BTRFS_INODE_REF_KEY]           = "INODE_REF",
 620                 [BTRFS_INODE_EXTREF_KEY]        = "INODE_EXTREF",
 621                 [BTRFS_DIR_ITEM_KEY]            = "DIR_ITEM",
 622                 [BTRFS_DIR_INDEX_KEY]           = "DIR_INDEX",
 623                 [BTRFS_DIR_LOG_ITEM_KEY]        = "DIR_LOG_ITEM",
 624                 [BTRFS_DIR_LOG_INDEX_KEY]       = "DIR_LOG_INDEX",
 625                 [BTRFS_XATTR_ITEM_KEY]          = "XATTR_ITEM",
 626                 [BTRFS_ORPHAN_ITEM_KEY]         = "ORPHAN_ITEM",
 627                 [BTRFS_ROOT_ITEM_KEY]           = "ROOT_ITEM",
 628                 [BTRFS_ROOT_REF_KEY]            = "ROOT_REF",
 629                 [BTRFS_ROOT_BACKREF_KEY]        = "ROOT_BACKREF",
 630                 [BTRFS_EXTENT_ITEM_KEY]         = "EXTENT_ITEM",
 631                 [BTRFS_METADATA_ITEM_KEY]       = "METADATA_ITEM",
 632                 [BTRFS_TREE_BLOCK_REF_KEY]      = "TREE_BLOCK_REF",
 633                 [BTRFS_SHARED_BLOCK_REF_KEY]    = "SHARED_BLOCK_REF",
 634                 [BTRFS_EXTENT_DATA_REF_KEY]     = "EXTENT_DATA_REF",
 635                 [BTRFS_SHARED_DATA_REF_KEY]     = "SHARED_DATA_REF",
 636                 [BTRFS_EXTENT_REF_V0_KEY]       = "EXTENT_REF_V0",
 637                 [BTRFS_CSUM_ITEM_KEY]           = "CSUM_ITEM",
 638                 [BTRFS_EXTENT_CSUM_KEY]         = "EXTENT_CSUM",
 639                 [BTRFS_EXTENT_DATA_KEY]         = "EXTENT_DATA",
 640                 [BTRFS_BLOCK_GROUP_ITEM_KEY]    = "BLOCK_GROUP_ITEM",
 641                 [BTRFS_FREE_SPACE_INFO_KEY]     = "FREE_SPACE_INFO",
 642                 [BTRFS_FREE_SPACE_EXTENT_KEY]   = "FREE_SPACE_EXTENT",
 643                 [BTRFS_FREE_SPACE_BITMAP_KEY]   = "FREE_SPACE_BITMAP",
 644                 [BTRFS_CHUNK_ITEM_KEY]          = "CHUNK_ITEM",
 645                 [BTRFS_DEV_ITEM_KEY]            = "DEV_ITEM",
 646                 [BTRFS_DEV_EXTENT_KEY]          = "DEV_EXTENT",
 647                 [BTRFS_TEMPORARY_ITEM_KEY]      = "TEMPORARY_ITEM",
 648                 [BTRFS_DEV_REPLACE_KEY]         = "DEV_REPLACE",
 649                 [BTRFS_STRING_ITEM_KEY]         = "STRING_ITEM",
 650                 [BTRFS_QGROUP_STATUS_KEY]       = "QGROUP_STATUS",
 651                 [BTRFS_QGROUP_RELATION_KEY]     = "QGROUP_RELATION",
 652                 [BTRFS_QGROUP_INFO_KEY]         = "QGROUP_INFO",
 653                 [BTRFS_QGROUP_LIMIT_KEY]        = "QGROUP_LIMIT",
 654                 [BTRFS_PERSISTENT_ITEM_KEY]     = "PERSISTENT_ITEM",
 655                 [BTRFS_UUID_KEY_SUBVOL]         = "UUID_KEY_SUBVOL",
 656                 [BTRFS_UUID_KEY_RECEIVED_SUBVOL] = "UUID_KEY_RECEIVED_SUBVOL",
 657         };
 658
 659         if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID) {
 660                 fprintf(stream, "UNTYPED");
 661                 return;
 662         }
 663
 664
 665         if (key_to_str[type])
 666                 fputs(key_to_str[type], stream);
 667         else
 668                 fprintf(stream, "UNKNOWN.%d", type);
 669 }
 670
 671 void print_objectid(FILE *stream, u64 objectid, u8 type)
 672 {
 673         switch (type) {
 674         case BTRFS_DEV_EXTENT_KEY:
 675                 /* device id */
 676                 fprintf(stream, "%llu", (unsigned long long)objectid);
 677                 return;
 678         case BTRFS_QGROUP_RELATION_KEY:
 679                 fprintf(stream, "%llu/%llu", btrfs_qgroup_level(objectid),
 680                        btrfs_qgroup_subvid(objectid));
 681                 return;
 682         case BTRFS_UUID_KEY_SUBVOL:
 683         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 684                 fprintf(stream, "0x%016llx", (unsigned long long)objectid);
 685                 return;
 686         }
 687
 688         switch (objectid) {
 689         case BTRFS_ROOT_TREE_OBJECTID:
 690                 if (type == BTRFS_DEV_ITEM_KEY)
 691                         fprintf(stream, "DEV_ITEMS");
 692                 else
 693                         fprintf(stream, "ROOT_TREE");
 694                 break;
 695         case BTRFS_EXTENT_TREE_OBJECTID:
 696                 fprintf(stream, "EXTENT_TREE");
 697                 break;
 698         case BTRFS_CHUNK_TREE_OBJECTID:
 699                 fprintf(stream, "CHUNK_TREE");
 700                 break;
 701         case BTRFS_DEV_TREE_OBJECTID:
 702                 fprintf(stream, "DEV_TREE");
 703                 break;
 704         case BTRFS_FS_TREE_OBJECTID:
 705                 fprintf(stream, "FS_TREE");
 706                 break;
 707         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 708                 fprintf(stream, "ROOT_TREE_DIR");
 709                 break;
 710         case BTRFS_CSUM_TREE_OBJECTID:
 711                 fprintf(stream, "CSUM_TREE");
 712                 break;
 713         case BTRFS_BALANCE_OBJECTID:
 714                 fprintf(stream, "BALANCE");
 715                 break;
 716         case BTRFS_ORPHAN_OBJECTID:
 717                 fprintf(stream, "ORPHAN");
 718                 break;
 719         case BTRFS_TREE_LOG_OBJECTID:
 720                 fprintf(stream, "TREE_LOG");
 721                 break;
 722         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 723                 fprintf(stream, "LOG_FIXUP");
 724                 break;
 725         case BTRFS_TREE_RELOC_OBJECTID:
 726                 fprintf(stream, "TREE_RELOC");
 727                 break;
 728         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 729                 fprintf(stream, "DATA_RELOC_TREE");
 730                 break;
 731         case BTRFS_EXTENT_CSUM_OBJECTID:
 732                 fprintf(stream, "EXTENT_CSUM");
 733                 break;
 734         case BTRFS_FREE_SPACE_OBJECTID:
 735                 fprintf(stream, "FREE_SPACE");
 736                 break;
 737         case BTRFS_FREE_INO_OBJECTID:
 738                 fprintf(stream, "FREE_INO");
 739                 break;
 740         case BTRFS_QUOTA_TREE_OBJECTID:
 741                 fprintf(stream, "QUOTA_TREE");
 742                 break;
 743         case BTRFS_UUID_TREE_OBJECTID:
 744                 fprintf(stream, "UUID_TREE");
 745                 break;
 746         case BTRFS_FREE_SPACE_TREE_OBJECTID:
 747                 fprintf(stream, "FREE_SPACE_TREE");
 748                 break;
 749         case BTRFS_MULTIPLE_OBJECTIDS:
 750                 fprintf(stream, "MULTIPLE");
 751                 break;
 752         case (u64)-1:
 753                 fprintf(stream, "-1");
 754                 break;
 755         case BTRFS_FIRST_CHUNK_TREE_OBJECTID:
 756                 if (type == BTRFS_CHUNK_ITEM_KEY) {
 757                         fprintf(stream, "FIRST_CHUNK_TREE");
 758                         break;
 759                 }
 760                 /* fall-thru */
 761         default:
 762                 fprintf(stream, "%llu", (unsigned long long)objectid);
 763         }
 764 }
 765
 766 void btrfs_print_key(struct btrfs_disk_key *disk_key)
 767 {
 768         u64 objectid = btrfs_disk_key_objectid(disk_key);
 769         u8 type = btrfs_disk_key_type(disk_key);
 770         u64 offset = btrfs_disk_key_offset(disk_key);
 771
 772         printf("key (");
 773         print_objectid(stdout, objectid, type);
 774         printf(" ");
 775         print_key_type(stdout, objectid, type);
 776         switch (type) {
 777         case BTRFS_QGROUP_RELATION_KEY:
 778         case BTRFS_QGROUP_INFO_KEY:
 779         case BTRFS_QGROUP_LIMIT_KEY:
 780                 printf(" %llu/%llu)", btrfs_qgroup_level(offset),
 781                        btrfs_qgroup_subvid(offset));
 782                 break;
 783         case BTRFS_UUID_KEY_SUBVOL:
 784         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 785                 printf(" 0x%016llx)", (unsigned long long)offset);
 786                 break;
 787         default:
 788                 if (offset == (u64)-1)
 789                         printf(" -1)");
 790                 else
 791                         printf(" %llu)", (unsigned long long)offset);
 792                 break;
 793         }
 794 }
 795
 796 static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
 797                             u32 item_size)
 798 {
 799         if (item_size & (sizeof(u64) - 1)) {
 800                 printf("btrfs: uuid item with illegal size %lu!\n",
 801                        (unsigned long)item_size);
 802                 return;
 803         }
 804         while (item_size) {
 805                 __le64 subvol_id;
 806
 807                 read_extent_buffer(l, &subvol_id, offset, sizeof(u64));
 808                 printf("\t\tsubvol_id %llu\n",
 809                         (unsigned long long)le64_to_cpu(subvol_id));
 810                 item_size -= sizeof(u64);
 811                 offset += sizeof(u64);
 812         }
 813 }
 814
 815 /* Btrfs inode flag stringification helper */
 816 #define STRCAT_ONE_INODE_FLAG(flags, name, empty, dst) ({                       \
 817         if (flags & BTRFS_INODE_##name) {                               \
 818                 if (!empty)                                             \
 819                         strcat(dst, "|");                               \
 820                 strcat(dst, #name);                                     \
 821                 empty = 0;                                              \
 822         }                                                               \
 823 })
 824
 825 /*
 826  * Caller should ensure sizeof(*ret) >= 102: all charactors plus '|' of
 827  * BTRFS_INODE_* flags
 828  */
 829 static void inode_flags_to_str(u64 flags, char *ret)
 830 {
 831         int empty = 1;
 832
 833         STRCAT_ONE_INODE_FLAG(flags, NODATASUM, empty, ret);
 834         STRCAT_ONE_INODE_FLAG(flags, NODATACOW, empty, ret);
 835         STRCAT_ONE_INODE_FLAG(flags, READONLY, empty, ret);
 836         STRCAT_ONE_INODE_FLAG(flags, NOCOMPRESS, empty, ret);
 837         STRCAT_ONE_INODE_FLAG(flags, PREALLOC, empty, ret);
 838         STRCAT_ONE_INODE_FLAG(flags, SYNC, empty, ret);
 839         STRCAT_ONE_INODE_FLAG(flags, IMMUTABLE, empty, ret);
 840         STRCAT_ONE_INODE_FLAG(flags, APPEND, empty, ret);
 841         STRCAT_ONE_INODE_FLAG(flags, NODUMP, empty, ret);
 842         STRCAT_ONE_INODE_FLAG(flags, NOATIME, empty, ret);
 843         STRCAT_ONE_INODE_FLAG(flags, DIRSYNC, empty, ret);
 844         STRCAT_ONE_INODE_FLAG(flags, COMPRESS, empty, ret);
 845         if (empty)
 846                 strcat(ret, "none");
 847 }
 848
 849 static void print_timespec(struct extent_buffer *eb,
 850                 struct btrfs_timespec *timespec, const char *prefix,
 851                 const char *suffix)
 852 {
 853         struct tm tm;
 854         u64 tmp_u64;
 855         u32 tmp_u32;
 856         time_t tmp_time;
 857         char timestamp[256];
 858
 859         tmp_u64 = btrfs_timespec_sec(eb, timespec);
 860         tmp_u32 = btrfs_timespec_nsec(eb, timespec);
 861         tmp_time = tmp_u64;
 862         localtime_r(&tmp_time, &tm);
 863         strftime(timestamp, sizeof(timestamp),
 864                         "%Y-%m-%d %H:%M:%S", &tm);
 865         printf("%s%llu.%u (%s)%s", prefix, (unsigned long long)tmp_u64, tmp_u32,
 866                         timestamp, suffix);
 867 }
 868
 869 static void print_inode_item(struct extent_buffer *eb,
 870                 struct btrfs_inode_item *ii)
 871 {
 872         char flags_str[256];
 873
 874         memset(flags_str, 0, sizeof(flags_str));
 875         inode_flags_to_str(btrfs_inode_flags(eb, ii), flags_str);
 876         printf("\t\tinode generation %llu transid %llu size %llu nbytes %llu\n"
 877                "\t\tblock group %llu mode %o links %u uid %u gid %u rdev %llu\n"
 878                "\t\tsequence %llu flags 0x%llx(%s)\n",
 879                (unsigned long long)btrfs_inode_generation(eb, ii),
 880                (unsigned long long)btrfs_inode_transid(eb, ii),
 881                (unsigned long long)btrfs_inode_size(eb, ii),
 882                (unsigned long long)btrfs_inode_nbytes(eb, ii),
 883                (unsigned long long)btrfs_inode_block_group(eb,ii),
 884                btrfs_inode_mode(eb, ii),
 885                btrfs_inode_nlink(eb, ii),
 886                btrfs_inode_uid(eb, ii),
 887                btrfs_inode_gid(eb, ii),
 888                (unsigned long long)btrfs_inode_rdev(eb,ii),
 889                (unsigned long long)btrfs_inode_flags(eb,ii),
 890                (unsigned long long)btrfs_inode_sequence(eb, ii),
 891                flags_str);
 892         print_timespec(eb, btrfs_inode_atime(ii), "\t\tatime ", "\n");
 893         print_timespec(eb, btrfs_inode_ctime(ii), "\t\tctime ", "\n");
 894         print_timespec(eb, btrfs_inode_mtime(ii), "\t\tmtime ", "\n");
 895         print_timespec(eb, btrfs_inode_otime(ii), "\t\totime ", "\n");
 896 }
 897
 898 static void print_disk_balance_args(struct btrfs_disk_balance_args *ba)
 899 {
 900         printf("\t\tprofiles %llu devid %llu target %llu flags %llu\n",
 901                         (unsigned long long)le64_to_cpu(ba->profiles),
 902                         (unsigned long long)le64_to_cpu(ba->devid),
 903                         (unsigned long long)le64_to_cpu(ba->target),
 904                         (unsigned long long)le64_to_cpu(ba->flags));
 905         printf("\t\tusage_min %u usage_max %u pstart %llu pend %llu\n",
 906                         le32_to_cpu(ba->usage_min),
 907                         le32_to_cpu(ba->usage_max),
 908                         (unsigned long long)le64_to_cpu(ba->pstart),
 909                         (unsigned long long)le64_to_cpu(ba->pend));
 910         printf("\t\tvstart %llu vend %llu limit_min %u limit_max %u\n",
 911                         (unsigned long long)le64_to_cpu(ba->vstart),
 912                         (unsigned long long)le64_to_cpu(ba->vend),
 913                         le32_to_cpu(ba->limit_min),
 914                         le32_to_cpu(ba->limit_max));
 915         printf("\t\tstripes_min %u stripes_max %u\n",
 916                         le32_to_cpu(ba->stripes_min),
 917                         le32_to_cpu(ba->stripes_max));
 918 }
 919
 920 static void print_balance_item(struct extent_buffer *eb,
 921                 struct btrfs_balance_item *bi)
 922 {
 923         printf("\t\tbalance status flags %llu\n",
 924                         btrfs_balance_item_flags(eb, bi));
 925
 926         printf("\t\tDATA\n");
 927         print_disk_balance_args(btrfs_balance_item_data(eb, bi));
 928         printf("\t\tMETADATA\n");
 929         print_disk_balance_args(btrfs_balance_item_meta(eb, bi));
 930         printf("\t\tSYSTEM\n");
 931         print_disk_balance_args(btrfs_balance_item_sys(eb, bi));
 932 }
 933
 934 static void print_dev_stats(struct extent_buffer *eb,
 935                 struct btrfs_dev_stats_item *stats, u32 size)
 936 {
 937         int i;
 938         u32 known = BTRFS_DEV_STAT_VALUES_MAX * sizeof(__le64);
 939         __le64 *values = btrfs_dev_stats_values(eb, stats);
 940
 941         printf("\t\tdevice stats\n");
 942         printf("\t\twrite_errs %llu read_errs %llu flush_errs %llu corruption_errs %llu generation %llu\n",
 943                 (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_WRITE_ERRS]),
 944                 (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_READ_ERRS]),
 945                 (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_FLUSH_ERRS]),
 946                 (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_CORRUPTION_ERRS]),
 947                 (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_GENERATION_ERRS]));
 948
 949         if (known < size) {
 950                 printf("\t\tunknown stats item bytes %u", size - known);
 951                 for (i = BTRFS_DEV_STAT_VALUES_MAX; i * sizeof(__le64) < size; i++) {
 952                         printf("\t\tunknown item %u offset %zu value %llu\n",
 953                                 i, i * sizeof(__le64),
 954                                 (unsigned long long)le64_to_cpu(values[i]));
 955                 }
 956         }
 957 }
 958
 959 /* Caller must ensure sizeof(*ret) >= 14 "WRITTEN|RELOC" */
 960 static void header_flags_to_str(u64 flags, char *ret)
 961 {
 962         int empty = 1;
 963
 964         if (flags & BTRFS_HEADER_FLAG_WRITTEN) {
 965                 empty = 0;
 966                 strcpy(ret, "WRITTEN");
 967         }
 968         if (flags & BTRFS_HEADER_FLAG_RELOC) {
 969                 if (!empty)
 970                         strcat(ret, "|");
 971                 strcat(ret, "RELOC");
 972         }
 973 }
 974
 975 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *eb)
 976 {
 977         struct btrfs_item *item;
 978         struct btrfs_disk_key disk_key;
 979         char flags_str[128];
 980         u32 i;
 981         u32 nr;
 982         u64 flags;
 983         u8 backref_rev;
 984
 985         flags = btrfs_header_flags(eb) & ~BTRFS_BACKREF_REV_MASK;
 986         backref_rev = btrfs_header_flags(eb) >> BTRFS_BACKREF_REV_SHIFT;
 987         header_flags_to_str(flags, flags_str);
 988         nr = btrfs_header_nritems(eb);
 989
 990         printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
 991                 (unsigned long long)btrfs_header_bytenr(eb), nr,
 992                 btrfs_leaf_free_space(root, eb),
 993                 (unsigned long long)btrfs_header_generation(eb),
 994                 (unsigned long long)btrfs_header_owner(eb));
 995         printf("leaf %llu flags 0x%llx(%s) backref revision %d\n",
 996                 btrfs_header_bytenr(eb), flags, flags_str, backref_rev);
 997         print_uuids(eb);
 998         fflush(stdout);
 999
1000         for (i = 0; i < nr; i++) {
1001                 u32 item_size;
1002                 void *ptr;
1003                 u64 objectid;
1004                 u32 type;
1005                 u64 offset;
1006                 char flags_str[256];
1007                 char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
1008                 u8 uuid[BTRFS_UUID_SIZE];
1009
1010                 item = btrfs_item_nr(i);
1011                 item_size = btrfs_item_size(eb, item);
1012                 /* Untyped extraction of slot from btrfs_item_ptr */
1013                 ptr = btrfs_item_ptr(eb, i, void*);
1014
1015                 btrfs_item_key(eb, &disk_key, i);
1016                 objectid = btrfs_disk_key_objectid(&disk_key);
1017                 type = btrfs_disk_key_type(&disk_key);
1018                 offset = btrfs_disk_key_offset(&disk_key);
1019
1020                 printf("\titem %d ", i);
1021                 btrfs_print_key(&disk_key);
1022                 printf(" itemoff %d itemsize %d\n",
1023                         btrfs_item_offset(eb, item),
1024                         btrfs_item_size(eb, item));
1025
1026                 if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID)
1027                         print_free_space_header(eb, i);
1028
1029                 switch (type) {
1030                 case BTRFS_INODE_ITEM_KEY:
1031                         print_inode_item(eb, ptr);
1032                         break;
1033                 case BTRFS_INODE_REF_KEY:
1034                         print_inode_ref_item(eb, item_size, ptr);
1035                         break;
1036                 case BTRFS_INODE_EXTREF_KEY:
1037                         print_inode_extref_item(eb, item_size, ptr);
1038                         break;
1039                 case BTRFS_DIR_ITEM_KEY:
1040                 case BTRFS_DIR_INDEX_KEY:
1041                 case BTRFS_XATTR_ITEM_KEY:
1042                         print_dir_item(eb, item_size, ptr);
1043                         break;
1044                 case BTRFS_DIR_LOG_INDEX_KEY:
1045                 case BTRFS_DIR_LOG_ITEM_KEY: {
1046                         struct btrfs_dir_log_item *dlog;
1047
1048                         dlog = btrfs_item_ptr(eb, i, struct btrfs_dir_log_item);
1049                         printf("\t\tdir log end %Lu\n",
1050                                (unsigned long long)btrfs_dir_log_end(eb, dlog));
1051                         break;
1052                         }
1053                 case BTRFS_ORPHAN_ITEM_KEY:
1054                         printf("\t\torphan item\n");
1055                         break;
1056                 case BTRFS_ROOT_ITEM_KEY:
1057                         print_root(eb, i);
1058                         break;
1059                 case BTRFS_ROOT_REF_KEY:
1060                         print_root_ref(eb, i, "ref");
1061                         break;
1062                 case BTRFS_ROOT_BACKREF_KEY:
1063                         print_root_ref(eb, i, "backref");
1064                         break;
1065                 case BTRFS_EXTENT_ITEM_KEY:
1066                         print_extent_item(eb, i, 0);
1067                         break;
1068                 case BTRFS_METADATA_ITEM_KEY:
1069                         print_extent_item(eb, i, 1);
1070                         break;
1071                 case BTRFS_TREE_BLOCK_REF_KEY:
1072                         printf("\t\ttree block backref\n");
1073                         break;
1074                 case BTRFS_SHARED_BLOCK_REF_KEY:
1075                         printf("\t\tshared block backref\n");
1076                         break;
1077                 case BTRFS_EXTENT_DATA_REF_KEY: {
1078                         struct btrfs_extent_data_ref *dref;
1079
1080                         dref = btrfs_item_ptr(eb, i, struct btrfs_extent_data_ref);
1081                         printf("\t\textent data backref root %llu "
1082                                "objectid %llu offset %llu count %u\n",
1083                                (unsigned long long)btrfs_extent_data_ref_root(eb, dref),
1084                                (unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
1085                                (unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
1086                                btrfs_extent_data_ref_count(eb, dref));
1087                         break;
1088                         }
1089                 case BTRFS_SHARED_DATA_REF_KEY: {
1090                         struct btrfs_shared_data_ref *sref;
1091                         sref = btrfs_item_ptr(eb, i, struct btrfs_shared_data_ref);
1092                         printf("\t\tshared data backref count %u\n",
1093                                btrfs_shared_data_ref_count(eb, sref));
1094                         break;
1095                         }
1096                 case BTRFS_EXTENT_REF_V0_KEY:
1097 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
1098                         print_extent_ref_v0(eb, i);
1099 #else
1100                         BUG();
1101 #endif
1102                         break;
1103                 case BTRFS_CSUM_ITEM_KEY:
1104                         printf("\t\tcsum item\n");
1105                         break;
1106                 case BTRFS_EXTENT_CSUM_KEY:
1107                         printf("\t\textent csum item\n");
1108                         break;
1109                 case BTRFS_EXTENT_DATA_KEY:
1110                         print_file_extent_item(eb, item, i, ptr);
1111                         break;
1112                 case BTRFS_BLOCK_GROUP_ITEM_KEY: {
1113                         struct btrfs_block_group_item bg_item;
1114
1115                         read_extent_buffer(eb, &bg_item, (unsigned long)ptr,
1116                                            sizeof(bg_item));
1117                         memset(flags_str, 0, sizeof(flags_str));
1118                         bg_flags_to_str(btrfs_block_group_flags(&bg_item),
1119                                         flags_str);
1120                         printf("\t\tblock group used %llu chunk_objectid %llu flags %s\n",
1121                                (unsigned long long)btrfs_block_group_used(&bg_item),
1122                                (unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
1123                                flags_str);
1124                         break;
1125                         }
1126                 case BTRFS_FREE_SPACE_INFO_KEY: {
1127                         struct btrfs_free_space_info *free_info;
1128
1129                         free_info = btrfs_item_ptr(eb, i, struct btrfs_free_space_info);
1130                         printf("\t\tfree space info extent count %u flags %u\n",
1131                                (unsigned)btrfs_free_space_extent_count(eb, free_info),
1132                                (unsigned)btrfs_free_space_flags(eb, free_info));
1133                         break;
1134                         }
1135                 case BTRFS_FREE_SPACE_EXTENT_KEY:
1136                         printf("\t\tfree space extent\n");
1137                         break;
1138                 case BTRFS_FREE_SPACE_BITMAP_KEY:
1139                         printf("\t\tfree space bitmap\n");
1140                         break;
1141                 case BTRFS_CHUNK_ITEM_KEY:
1142                         print_chunk(eb, ptr);
1143                         break;
1144                 case BTRFS_DEV_ITEM_KEY:
1145                         print_dev_item(eb, ptr);
1146                         break;
1147                 case BTRFS_DEV_EXTENT_KEY: {
1148                         struct btrfs_dev_extent *dev_extent;
1149
1150                         dev_extent = btrfs_item_ptr(eb, i,
1151                                                     struct btrfs_dev_extent);
1152                         read_extent_buffer(eb, uuid,
1153                                 (unsigned long)btrfs_dev_extent_chunk_tree_uuid(dev_extent),
1154                                 BTRFS_UUID_SIZE);
1155                         uuid_unparse(uuid, uuid_str);
1156                         printf("\t\tdev extent chunk_tree %llu\n"
1157                                "\t\tchunk_objectid %llu chunk_offset %llu "
1158                                "length %llu\n"
1159                                "\t\tchunk_tree_uuid %s\n",
1160                                (unsigned long long)
1161                                btrfs_dev_extent_chunk_tree(eb, dev_extent),
1162                                (unsigned long long)
1163                                btrfs_dev_extent_chunk_objectid(eb, dev_extent),
1164                                (unsigned long long)
1165                                btrfs_dev_extent_chunk_offset(eb, dev_extent),
1166                                (unsigned long long)
1167                                btrfs_dev_extent_length(eb, dev_extent),
1168                                uuid_str);
1169                         break;
1170                         }
1171                 case BTRFS_QGROUP_STATUS_KEY: {
1172                         struct btrfs_qgroup_status_item *qg_status;
1173
1174                         qg_status = btrfs_item_ptr(eb, i,
1175                                         struct btrfs_qgroup_status_item);
1176                         memset(flags_str, 0, sizeof(flags_str));
1177                         qgroup_flags_to_str(btrfs_qgroup_status_flags(eb, qg_status),
1178                                         flags_str);
1179                         printf("\t\tversion %llu generation %llu flags %s "
1180                                 "scan %lld\n",
1181                                 (unsigned long long)
1182                                 btrfs_qgroup_status_version(eb, qg_status),
1183                                 (unsigned long long)
1184                                 btrfs_qgroup_status_generation(eb, qg_status),
1185                                 flags_str,
1186                                 (unsigned long long)
1187                                 btrfs_qgroup_status_rescan(eb, qg_status));
1188                         break;
1189                         }
1190                 case BTRFS_QGROUP_RELATION_KEY:
1191                         break;
1192                 case BTRFS_QGROUP_INFO_KEY: {
1193                         struct btrfs_qgroup_info_item *qg_info;
1194
1195                         qg_info = btrfs_item_ptr(eb, i,
1196                                                  struct btrfs_qgroup_info_item);
1197                         printf("\t\tgeneration %llu\n"
1198                              "\t\treferenced %llu referenced_compressed %llu\n"
1199                              "\t\texclusive %llu exclusive_compressed %llu\n",
1200                                (unsigned long long)
1201                                btrfs_qgroup_info_generation(eb, qg_info),
1202                                (unsigned long long)
1203                                btrfs_qgroup_info_referenced(eb, qg_info),
1204                                (unsigned long long)
1205                                btrfs_qgroup_info_referenced_compressed(eb,
1206                                                                        qg_info),
1207                                (unsigned long long)
1208                                btrfs_qgroup_info_exclusive(eb, qg_info),
1209                                (unsigned long long)
1210                                btrfs_qgroup_info_exclusive_compressed(eb,
1211                                                                       qg_info));
1212                         break;
1213                         }
1214                 case BTRFS_QGROUP_LIMIT_KEY: {
1215                         struct btrfs_qgroup_limit_item *qg_limit;
1216
1217                         qg_limit = btrfs_item_ptr(eb, i,
1218                                          struct btrfs_qgroup_limit_item);
1219                         printf("\t\tflags %llx\n"
1220                              "\t\tmax_referenced %lld max_exclusive %lld\n"
1221                              "\t\trsv_referenced %lld rsv_exclusive %lld\n",
1222                                (unsigned long long)
1223                                btrfs_qgroup_limit_flags(eb, qg_limit),
1224                                (long long)
1225                                btrfs_qgroup_limit_max_referenced(eb, qg_limit),
1226                                (long long)
1227                                btrfs_qgroup_limit_max_exclusive(eb, qg_limit),
1228                                (long long)
1229                                btrfs_qgroup_limit_rsv_referenced(eb, qg_limit),
1230                                (long long)
1231                                btrfs_qgroup_limit_rsv_exclusive(eb, qg_limit));
1232                         break;
1233                         }
1234                 case BTRFS_UUID_KEY_SUBVOL:
1235                 case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
1236                         print_uuid_item(eb, btrfs_item_ptr_offset(eb, i),
1237                                         btrfs_item_size_nr(eb, i));
1238                         break;
1239                 case BTRFS_STRING_ITEM_KEY: {
1240                         const char *str = eb->data + btrfs_item_ptr_offset(eb, i);
1241
1242                         printf("\t\titem data %.*s\n", item_size, str);
1243                         break;
1244                         }
1245                 case BTRFS_PERSISTENT_ITEM_KEY:
1246                         printf("\t\tpersistent item objectid ");
1247                         print_objectid(stdout, objectid, BTRFS_PERSISTENT_ITEM_KEY);
1248                         printf(" offset %llu\n", (unsigned long long)offset);
1249                         switch (objectid) {
1250                         case BTRFS_DEV_STATS_OBJECTID:
1251                                 print_dev_stats(eb, ptr, item_size);
1252                                 break;
1253                         default:
1254                                 printf("\t\tunknown persistent item objectid %llu\n",
1255                                                 objectid);
1256                         }
1257                         break;
1258                 case BTRFS_TEMPORARY_ITEM_KEY:
1259                         printf("\t\ttemporary item objectid ");
1260                         print_objectid(stdout, objectid, BTRFS_TEMPORARY_ITEM_KEY);
1261                         printf(" offset %llu\n", (unsigned long long)offset);
1262                         switch (objectid) {
1263                         case BTRFS_BALANCE_OBJECTID:
1264                                 print_balance_item(eb, ptr);
1265                                 break;
1266                         default:
1267                                 printf("\t\tunknown temporary item objectid %llu\n",
1268                                                 objectid);
1269                         }
1270                         break;
1271                 };
1272                 fflush(stdout);
1273         }
1274 }
1275
1276 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb, int follow)
1277 {
1278         u32 i;
1279         u32 nr;
1280         struct btrfs_disk_key disk_key;
1281         struct btrfs_key key;
1282         struct extent_buffer *next;
1283
1284         if (!eb)
1285                 return;
1286         nr = btrfs_header_nritems(eb);
1287         if (btrfs_is_leaf(eb)) {
1288                 btrfs_print_leaf(root, eb);
1289                 return;
1290         }
1291         printf("node %llu level %d items %d free %u generation %llu owner %llu\n",
1292                (unsigned long long)eb->start,
1293                 btrfs_header_level(eb), nr,
1294                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
1295                 (unsigned long long)btrfs_header_generation(eb),
1296                 (unsigned long long)btrfs_header_owner(eb));
1297         print_uuids(eb);
1298         fflush(stdout);
1299         for (i = 0; i < nr; i++) {
1300                 u64 blocknr = btrfs_node_blockptr(eb, i);
1301                 btrfs_node_key(eb, &disk_key, i);
1302                 btrfs_disk_key_to_cpu(&key, &disk_key);
1303                 printf("\t");
1304                 btrfs_print_key(&disk_key);
1305                 printf(" block %llu (%llu) gen %llu\n",
1306                        (unsigned long long)blocknr,
1307                        (unsigned long long)blocknr / root->fs_info->nodesize,
1308                        (unsigned long long)btrfs_node_ptr_generation(eb, i));
1309                 fflush(stdout);
1310         }
1311         if (!follow)
1312                 return;
1313
1314         for (i = 0; i < nr; i++) {
1315                 next = read_tree_block(root->fs_info,
1316                                 btrfs_node_blockptr(eb, i), root->fs_info->nodesize,
1317                                 btrfs_node_ptr_generation(eb, i));
1318                 if (!extent_buffer_uptodate(next)) {
1319                         fprintf(stderr, "failed to read %llu in tree %llu\n",
1320                                 (unsigned long long)btrfs_node_blockptr(eb, i),
1321                                 (unsigned long long)btrfs_header_owner(eb));
1322                         continue;
1323                 }
1324                 if (btrfs_is_leaf(next) && btrfs_header_level(eb) != 1) {
1325                         warning(
1326         "eb corrupted: item %d eb level %d next level %d, skipping the rest",
1327                                 i, btrfs_header_level(next),
1328                                 btrfs_header_level(eb));
1329                         goto out;
1330                 }
1331                 if (btrfs_header_level(next) != btrfs_header_level(eb) - 1) {
1332                         warning(
1333         "eb corrupted: item %d eb level %d next level %d, skipping the rest",
1334                                 i, btrfs_header_level(next),
1335                                 btrfs_header_level(eb));
1336                         goto out;
1337                 }
1338                 btrfs_print_tree(root, next, 1);
1339                 free_extent_buffer(next);
1340         }
1341
1342         return;
1343
1344 out:
1345         free_extent_buffer(next);
1346 }