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\tindex %llu parent %llu namelen %u name: %.*s\n",
 108                        (unsigned long long)index,
 109                        (unsigned long long)parent_objid,
 110                        name_len, len, namebuf);
 111
 112                 len = sizeof(*extref) + name_len;
 113                 extref = (struct btrfs_inode_extref *)((char *)extref + len);
 114                 cur += len;
 115         }
 116 }
 117
 118 static void print_inode_ref_item(struct extent_buffer *eb, u32 size,
 119                                 struct btrfs_inode_ref *ref)
 120 {
 121         u32 cur = 0;
 122         u32 len;
 123         u32 name_len;
 124         u64 index;
 125         char namebuf[BTRFS_NAME_LEN];
 126
 127         while (cur < size) {
 128                 name_len = btrfs_inode_ref_name_len(eb, ref);
 129                 index = btrfs_inode_ref_index(eb, ref);
 130                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
 131                 read_extent_buffer(eb, namebuf, (unsigned long)(ref + 1), len);
 132                 printf("\t\tindex %llu namelen %u name: %.*s\n",
 133                        (unsigned long long)index, name_len, len, namebuf);
 134                 len = sizeof(*ref) + name_len;
 135                 ref = (struct btrfs_inode_ref *)((char *)ref + len);
 136                 cur += len;
 137         }
 138 }
 139
 140 /* Caller should ensure sizeof(*ret)>=21 "DATA|METADATA|RAID10" */
 141 static void bg_flags_to_str(u64 flags, char *ret)
 142 {
 143         int empty = 1;
 144
 145         if (flags & BTRFS_BLOCK_GROUP_DATA) {
 146                 empty = 0;
 147                 strcpy(ret, "DATA");
 148         }
 149         if (flags & BTRFS_BLOCK_GROUP_METADATA) {
 150                 if (!empty)
 151                         strcat(ret, "|");
 152                 strcat(ret, "METADATA");
 153         }
 154         if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
 155                 if (!empty)
 156                         strcat(ret, "|");
 157                 strcat(ret, "SYSTEM");
 158         }
 159         switch (flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
 160         case BTRFS_BLOCK_GROUP_RAID0:
 161                 strcat(ret, "|RAID0");
 162                 break;
 163         case BTRFS_BLOCK_GROUP_RAID1:
 164                 strcat(ret, "|RAID1");
 165                 break;
 166         case BTRFS_BLOCK_GROUP_DUP:
 167                 strcat(ret, "|DUP");
 168                 break;
 169         case BTRFS_BLOCK_GROUP_RAID10:
 170                 strcat(ret, "|RAID10");
 171                 break;
 172         case BTRFS_BLOCK_GROUP_RAID5:
 173                 strcat(ret, "|RAID5");
 174                 break;
 175         case BTRFS_BLOCK_GROUP_RAID6:
 176                 strcat(ret, "|RAID6");
 177                 break;
 178         default:
 179                 break;
 180         }
 181 }
 182
 183 /* Caller should ensure sizeof(*ret)>= 26 "OFF|SCANNING|INCONSISTENT" */
 184 static void qgroup_flags_to_str(u64 flags, char *ret)
 185 {
 186         if (flags & BTRFS_QGROUP_STATUS_FLAG_ON)
 187                 strcpy(ret, "ON");
 188         else
 189                 strcpy(ret, "OFF");
 190
 191         if (flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN)
 192                 strcat(ret, "|SCANNING");
 193         if (flags & BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT)
 194                 strcat(ret, "|INCONSISTENT");
 195 }
 196
 197 void print_chunk_item(struct extent_buffer *eb, struct btrfs_chunk *chunk)
 198 {
 199         u16 num_stripes = btrfs_chunk_num_stripes(eb, chunk);
 200         int i;
 201         u32 chunk_item_size = btrfs_chunk_item_size(num_stripes);
 202         char chunk_flags_str[32] = {0};
 203
 204         if ((unsigned long)chunk + chunk_item_size > eb->len) {
 205                 printf("\t\tchunk item invalid\n");
 206                 return;
 207         }
 208
 209         bg_flags_to_str(btrfs_chunk_type(eb, chunk), chunk_flags_str);
 210         printf("\t\tlength %llu owner %llu stripe_len %llu type %s\n",
 211                (unsigned long long)btrfs_chunk_length(eb, chunk),
 212                (unsigned long long)btrfs_chunk_owner(eb, chunk),
 213                (unsigned long long)btrfs_chunk_stripe_len(eb, chunk),
 214                 chunk_flags_str);
 215         printf("\t\tio_align %u io_width %u sector_size %u\n",
 216                         btrfs_chunk_io_align(eb, chunk),
 217                         btrfs_chunk_io_width(eb, chunk),
 218                         btrfs_chunk_sector_size(eb, chunk));
 219         printf("\t\tnum_stripes %hu sub_stripes %hu\n", num_stripes,
 220                         btrfs_chunk_sub_stripes(eb, chunk));
 221         for (i = 0 ; i < num_stripes ; i++) {
 222                 unsigned char dev_uuid[BTRFS_UUID_SIZE];
 223                 char str_dev_uuid[BTRFS_UUID_UNPARSED_SIZE];
 224                 u64 uuid_offset;
 225                 u64 stripe_offset;
 226
 227                 uuid_offset = (unsigned long)btrfs_stripe_dev_uuid_nr(chunk, i);
 228                 stripe_offset = (unsigned long)btrfs_stripe_nr(chunk, i);
 229
 230                 if (uuid_offset < stripe_offset ||
 231                         (uuid_offset + BTRFS_UUID_SIZE) >
 232                                 (stripe_offset + sizeof(struct btrfs_stripe))) {
 233                         printf("\t\t\tstripe %d invalid\n", i);
 234                         break;
 235                 }
 236
 237                 read_extent_buffer(eb, dev_uuid,
 238                         uuid_offset,
 239                         BTRFS_UUID_SIZE);
 240                 uuid_unparse(dev_uuid, str_dev_uuid);
 241                 printf("\t\t\tstripe %d devid %llu offset %llu\n", i,
 242                       (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
 243                       (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
 244                 printf("\t\t\tdev_uuid %s\n", str_dev_uuid);
 245         }
 246 }
 247
 248 static void print_dev_item(struct extent_buffer *eb,
 249                            struct btrfs_dev_item *dev_item)
 250 {
 251         char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
 252         char fsid_str[BTRFS_UUID_UNPARSED_SIZE];
 253         u8 uuid[BTRFS_UUID_SIZE];
 254         u8 fsid[BTRFS_UUID_SIZE];
 255
 256         read_extent_buffer(eb, uuid,
 257                            (unsigned long)btrfs_device_uuid(dev_item),
 258                            BTRFS_UUID_SIZE);
 259         uuid_unparse(uuid, uuid_str);
 260         read_extent_buffer(eb, fsid,
 261                            (unsigned long)btrfs_device_fsid(dev_item),
 262                            BTRFS_UUID_SIZE);
 263         uuid_unparse(fsid, fsid_str);
 264         printf("\t\tdevid %llu total_bytes %llu bytes_used %Lu\n"
 265                "\t\tio_align %u io_width %u sector_size %u type %llu\n"
 266                "\t\tgeneration %llu start_offset %llu dev_group %u\n"
 267                "\t\tseek_speed %hhu bandwidth %hhu\n"
 268                "\t\tuuid %s\n"
 269                "\t\tfsid %s\n",
 270                (unsigned long long)btrfs_device_id(eb, dev_item),
 271                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
 272                (unsigned long long)btrfs_device_bytes_used(eb, dev_item),
 273                btrfs_device_io_align(eb, dev_item),
 274                btrfs_device_io_width(eb, dev_item),
 275                btrfs_device_sector_size(eb, dev_item),
 276                (unsigned long long)btrfs_device_type(eb, dev_item),
 277                (unsigned long long)btrfs_device_generation(eb, dev_item),
 278                (unsigned long long)btrfs_device_start_offset(eb, dev_item),
 279                btrfs_device_group(eb, dev_item),
 280                btrfs_device_seek_speed(eb, dev_item),
 281                btrfs_device_bandwidth(eb, dev_item),
 282                uuid_str, fsid_str);
 283 }
 284
 285 static void print_uuids(struct extent_buffer *eb)
 286 {
 287         char fs_uuid[BTRFS_UUID_UNPARSED_SIZE];
 288         char chunk_uuid[BTRFS_UUID_UNPARSED_SIZE];
 289         u8 disk_uuid[BTRFS_UUID_SIZE];
 290
 291         read_extent_buffer(eb, disk_uuid, btrfs_header_fsid(),
 292                            BTRFS_FSID_SIZE);
 293
 294         fs_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 295         uuid_unparse(disk_uuid, fs_uuid);
 296
 297         read_extent_buffer(eb, disk_uuid,
 298                            btrfs_header_chunk_tree_uuid(eb),
 299                            BTRFS_UUID_SIZE);
 300
 301         chunk_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 302         uuid_unparse(disk_uuid, chunk_uuid);
 303         printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
 304 }
 305
 306 static void compress_type_to_str(u8 compress_type, char *ret)
 307 {
 308         switch (compress_type) {
 309         case BTRFS_COMPRESS_NONE:
 310                 strcpy(ret, "none");
 311                 break;
 312         case BTRFS_COMPRESS_ZLIB:
 313                 strcpy(ret, "zlib");
 314                 break;
 315         case BTRFS_COMPRESS_LZO:
 316                 strcpy(ret, "lzo");
 317                 break;
 318         default:
 319                 sprintf(ret, "UNKNOWN.%d", compress_type);
 320         }
 321 }
 322
 323 static const char* file_extent_type_to_str(u8 type)
 324 {
 325         switch (type) {
 326         case BTRFS_FILE_EXTENT_INLINE: return "inline";
 327         case BTRFS_FILE_EXTENT_PREALLOC: return "prealloc";
 328         case BTRFS_FILE_EXTENT_REG: return "regular";
 329         default: return "unknown";
 330         }
 331 }
 332
 333 static void print_file_extent_item(struct extent_buffer *eb,
 334                                    struct btrfs_item *item,
 335                                    int slot,
 336                                    struct btrfs_file_extent_item *fi)
 337 {
 338         unsigned char extent_type = btrfs_file_extent_type(eb, fi);
 339         char compress_str[16];
 340
 341         compress_type_to_str(btrfs_file_extent_compression(eb, fi),
 342                              compress_str);
 343
 344         printf("\t\tgeneration %llu type %hhu (%s)\n",
 345                         btrfs_file_extent_generation(eb, fi),
 346                         extent_type, file_extent_type_to_str(extent_type));
 347
 348         if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 349                 printf("\t\tinline extent data size %u ram_bytes %u compression %hhu (%s)\n",
 350                                 btrfs_file_extent_inline_item_len(eb, item),
 351                                 btrfs_file_extent_inline_len(eb, slot, fi),
 352                                 btrfs_file_extent_compression(eb, fi),
 353                                 compress_str);
 354                 return;
 355         }
 356         if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
 357                 printf("\t\tprealloc data disk byte %llu nr %llu\n",
 358                   (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 359                   (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 360                 printf("\t\tprealloc data offset %llu nr %llu\n",
 361                   (unsigned long long)btrfs_file_extent_offset(eb, fi),
 362                   (unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
 363                 return;
 364         }
 365         printf("\t\textent data disk byte %llu nr %llu\n",
 366                 (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 367                 (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 368         printf("\t\textent data offset %llu nr %llu ram %llu\n",
 369                 (unsigned long long)btrfs_file_extent_offset(eb, fi),
 370                 (unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
 371                 (unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
 372         printf("\t\textent compression %hhu (%s)\n",
 373                         btrfs_file_extent_compression(eb, fi),
 374                         compress_str);
 375 }
 376
 377 /* Caller should ensure sizeof(*ret) >= 16("DATA|TREE_BLOCK") */
 378 static void extent_flags_to_str(u64 flags, char *ret)
 379 {
 380         int empty = 1;
 381
 382         if (flags & BTRFS_EXTENT_FLAG_DATA) {
 383                 empty = 0;
 384                 strcpy(ret, "DATA");
 385         }
 386         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
 387                 if (!empty) {
 388                         empty = 0;
 389                         strcat(ret, "|");
 390                 }
 391                 strcat(ret, "TREE_BLOCK");
 392         }
 393         if (flags & BTRFS_BLOCK_FLAG_FULL_BACKREF) {
 394                 strcat(ret, "|");
 395                 strcat(ret, "FULL_BACKREF");
 396         }
 397 }
 398
 399 void print_extent_item(struct extent_buffer *eb, int slot, int metadata)
 400 {
 401         struct btrfs_extent_item *ei;
 402         struct btrfs_extent_inline_ref *iref;
 403         struct btrfs_extent_data_ref *dref;
 404         struct btrfs_shared_data_ref *sref;
 405         struct btrfs_disk_key key;
 406         unsigned long end;
 407         unsigned long ptr;
 408         int type;
 409         u32 item_size = btrfs_item_size_nr(eb, slot);
 410         u64 flags;
 411         u64 offset;
 412         char flags_str[32] = {0};
 413
 414         if (item_size < sizeof(*ei)) {
 415 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 416                 struct btrfs_extent_item_v0 *ei0;
 417                 BUG_ON(item_size != sizeof(*ei0));
 418                 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
 419                 printf("\t\trefs %u\n",
 420                        btrfs_extent_refs_v0(eb, ei0));
 421                 return;
 422 #else
 423                 BUG();
 424 #endif
 425         }
 426
 427         ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
 428         flags = btrfs_extent_flags(eb, ei);
 429         extent_flags_to_str(flags, flags_str);
 430
 431         printf("\t\trefs %llu gen %llu flags %s\n",
 432                (unsigned long long)btrfs_extent_refs(eb, ei),
 433                (unsigned long long)btrfs_extent_generation(eb, ei),
 434                flags_str);
 435
 436         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK && !metadata) {
 437                 struct btrfs_tree_block_info *info;
 438                 info = (struct btrfs_tree_block_info *)(ei + 1);
 439                 btrfs_tree_block_key(eb, info, &key);
 440                 printf("\t\ttree block ");
 441                 btrfs_print_key(&key);
 442                 printf(" level %d\n", btrfs_tree_block_level(eb, info));
 443                 iref = (struct btrfs_extent_inline_ref *)(info + 1);
 444         } else if (metadata) {
 445                 struct btrfs_key tmp;
 446
 447                 btrfs_item_key_to_cpu(eb, &tmp, slot);
 448                 printf("\t\ttree block skinny level %d\n", (int)tmp.offset);
 449                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 450         } else{
 451                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 452         }
 453
 454         ptr = (unsigned long)iref;
 455         end = (unsigned long)ei + item_size;
 456         while (ptr < end) {
 457                 iref = (struct btrfs_extent_inline_ref *)ptr;
 458                 type = btrfs_extent_inline_ref_type(eb, iref);
 459                 offset = btrfs_extent_inline_ref_offset(eb, iref);
 460                 switch (type) {
 461                 case BTRFS_TREE_BLOCK_REF_KEY:
 462                         printf("\t\ttree block backref root %llu\n",
 463                                (unsigned long long)offset);
 464                         break;
 465                 case BTRFS_SHARED_BLOCK_REF_KEY:
 466                         printf("\t\tshared block backref parent %llu\n",
 467                                (unsigned long long)offset);
 468                         break;
 469                 case BTRFS_EXTENT_DATA_REF_KEY:
 470                         dref = (struct btrfs_extent_data_ref *)(&iref->offset);
 471                         printf("\t\textent data backref root %llu "
 472                                "objectid %llu offset %llu count %u\n",
 473                                (unsigned long long)btrfs_extent_data_ref_root(eb, dref),
 474                                (unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
 475                                (unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
 476                                btrfs_extent_data_ref_count(eb, dref));
 477                         break;
 478                 case BTRFS_SHARED_DATA_REF_KEY:
 479                         sref = (struct btrfs_shared_data_ref *)(iref + 1);
 480                         printf("\t\tshared data backref parent %llu count %u\n",
 481                                (unsigned long long)offset,
 482                                btrfs_shared_data_ref_count(eb, sref));
 483                         break;
 484                 default:
 485                         return;
 486                 }
 487                 ptr += btrfs_extent_inline_ref_size(type);
 488         }
 489         WARN_ON(ptr > end);
 490 }
 491
 492 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 493 static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
 494 {
 495         struct btrfs_extent_ref_v0 *ref0;
 496
 497         ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
 498         printf("\t\textent back ref root %llu gen %llu "
 499                 "owner %llu num_refs %lu\n",
 500                 (unsigned long long)btrfs_ref_root_v0(eb, ref0),
 501                 (unsigned long long)btrfs_ref_generation_v0(eb, ref0),
 502                 (unsigned long long)btrfs_ref_objectid_v0(eb, ref0),
 503                 (unsigned long)btrfs_ref_count_v0(eb, ref0));
 504 }
 505 #endif
 506
 507 static void print_root_ref(struct extent_buffer *leaf, int slot, const char *tag)
 508 {
 509         struct btrfs_root_ref *ref;
 510         char namebuf[BTRFS_NAME_LEN];
 511         int namelen;
 512
 513         ref = btrfs_item_ptr(leaf, slot, struct btrfs_root_ref);
 514         namelen = btrfs_root_ref_name_len(leaf, ref);
 515         read_extent_buffer(leaf, namebuf, (unsigned long)(ref + 1), namelen);
 516         printf("\t\troot %s key dirid %llu sequence %llu name %.*s\n", tag,
 517                (unsigned long long)btrfs_root_ref_dirid(leaf, ref),
 518                (unsigned long long)btrfs_root_ref_sequence(leaf, ref),
 519                namelen, namebuf);
 520 }
 521
 522 static int empty_uuid(const u8 *uuid)
 523 {
 524         int i;
 525
 526         for (i = 0; i < BTRFS_UUID_SIZE; i++)
 527                 if (uuid[i])
 528                         return 0;
 529         return 1;
 530 }
 531
 532 /*
 533  * Caller must ensure sizeof(*ret) >= 7 "RDONLY"
 534  */
 535 static void root_flags_to_str(u64 flags, char *ret)
 536 {
 537         if (flags & BTRFS_ROOT_SUBVOL_RDONLY)
 538                 strcat(ret, "RDONLY");
 539         else
 540                 strcat(ret, "none");
 541 }
 542
 543 static void print_root_item(struct extent_buffer *leaf, int slot)
 544 {
 545         struct btrfs_root_item *ri;
 546         struct btrfs_root_item root_item;
 547         int len;
 548         char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
 549         char flags_str[32] = {0};
 550         struct btrfs_key drop_key;
 551
 552         ri = btrfs_item_ptr(leaf, slot, struct btrfs_root_item);
 553         len = btrfs_item_size_nr(leaf, slot);
 554
 555         memset(&root_item, 0, sizeof(root_item));
 556         read_extent_buffer(leaf, &root_item, (unsigned long)ri, len);
 557         root_flags_to_str(btrfs_root_flags(&root_item), flags_str);
 558
 559         printf("\t\tgeneration %llu root_dirid %llu bytenr %llu level %hhu refs %u\n",
 560                 (unsigned long long)btrfs_root_generation(&root_item),
 561                 (unsigned long long)btrfs_root_dirid(&root_item),
 562                 (unsigned long long)btrfs_root_bytenr(&root_item),
 563                 btrfs_root_level(&root_item),
 564                 btrfs_root_refs(&root_item));
 565         printf("\t\tlastsnap %llu byte_limit %llu bytes_used %llu flags 0x%llx(%s)\n",
 566                 (unsigned long long)btrfs_root_last_snapshot(&root_item),
 567                 (unsigned long long)btrfs_root_limit(&root_item),
 568                 (unsigned long long)btrfs_root_used(&root_item),
 569                 (unsigned long long)btrfs_root_flags(&root_item),
 570                 flags_str);
 571
 572         if (root_item.generation == root_item.generation_v2) {
 573                 uuid_unparse(root_item.uuid, uuid_str);
 574                 printf("\t\tuuid %s\n", uuid_str);
 575                 if (!empty_uuid(root_item.parent_uuid)) {
 576                         uuid_unparse(root_item.parent_uuid, uuid_str);
 577                         printf("\t\tparent_uuid %s\n", uuid_str);
 578                 }
 579                 if (!empty_uuid(root_item.received_uuid)) {
 580                         uuid_unparse(root_item.received_uuid, uuid_str);
 581                         printf("\t\treceived_uuid %s\n", uuid_str);
 582                 }
 583                 if (root_item.ctransid) {
 584                         printf("\t\tctransid %llu otransid %llu stransid %llu rtransid %llu\n",
 585                                 btrfs_root_ctransid(&root_item),
 586                                 btrfs_root_otransid(&root_item),
 587                                 btrfs_root_stransid(&root_item),
 588                                 btrfs_root_rtransid(&root_item));
 589                 }
 590         }
 591
 592         btrfs_disk_key_to_cpu(&drop_key, &root_item.drop_progress);
 593         printf("\t\tdrop ");
 594         btrfs_print_key(&root_item.drop_progress);
 595         printf(" level %hhu\n", root_item.drop_level);
 596 }
 597
 598 static void print_free_space_header(struct extent_buffer *leaf, int slot)
 599 {
 600         struct btrfs_free_space_header *header;
 601         struct btrfs_disk_key location;
 602
 603         header = btrfs_item_ptr(leaf, slot, struct btrfs_free_space_header);
 604         btrfs_free_space_key(leaf, header, &location);
 605         printf("\t\tlocation ");
 606         btrfs_print_key(&location);
 607         printf("\n");
 608         printf("\t\tcache generation %llu entries %llu bitmaps %llu\n",
 609                (unsigned long long)btrfs_free_space_generation(leaf, header),
 610                (unsigned long long)btrfs_free_space_entries(leaf, header),
 611                (unsigned long long)btrfs_free_space_bitmaps(leaf, header));
 612 }
 613
 614 void print_key_type(FILE *stream, u64 objectid, u8 type)
 615 {
 616         static const char* key_to_str[256] = {
 617                 [BTRFS_INODE_ITEM_KEY]          = "INODE_ITEM",
 618                 [BTRFS_INODE_REF_KEY]           = "INODE_REF",
 619                 [BTRFS_INODE_EXTREF_KEY]        = "INODE_EXTREF",
 620                 [BTRFS_DIR_ITEM_KEY]            = "DIR_ITEM",
 621                 [BTRFS_DIR_INDEX_KEY]           = "DIR_INDEX",
 622                 [BTRFS_DIR_LOG_ITEM_KEY]        = "DIR_LOG_ITEM",
 623                 [BTRFS_DIR_LOG_INDEX_KEY]       = "DIR_LOG_INDEX",
 624                 [BTRFS_XATTR_ITEM_KEY]          = "XATTR_ITEM",
 625                 [BTRFS_ORPHAN_ITEM_KEY]         = "ORPHAN_ITEM",
 626                 [BTRFS_ROOT_ITEM_KEY]           = "ROOT_ITEM",
 627                 [BTRFS_ROOT_REF_KEY]            = "ROOT_REF",
 628                 [BTRFS_ROOT_BACKREF_KEY]        = "ROOT_BACKREF",
 629                 [BTRFS_EXTENT_ITEM_KEY]         = "EXTENT_ITEM",
 630                 [BTRFS_METADATA_ITEM_KEY]       = "METADATA_ITEM",
 631                 [BTRFS_TREE_BLOCK_REF_KEY]      = "TREE_BLOCK_REF",
 632                 [BTRFS_SHARED_BLOCK_REF_KEY]    = "SHARED_BLOCK_REF",
 633                 [BTRFS_EXTENT_DATA_REF_KEY]     = "EXTENT_DATA_REF",
 634                 [BTRFS_SHARED_DATA_REF_KEY]     = "SHARED_DATA_REF",
 635                 [BTRFS_EXTENT_REF_V0_KEY]       = "EXTENT_REF_V0",
 636                 [BTRFS_CSUM_ITEM_KEY]           = "CSUM_ITEM",
 637                 [BTRFS_EXTENT_CSUM_KEY]         = "EXTENT_CSUM",
 638                 [BTRFS_EXTENT_DATA_KEY]         = "EXTENT_DATA",
 639                 [BTRFS_BLOCK_GROUP_ITEM_KEY]    = "BLOCK_GROUP_ITEM",
 640                 [BTRFS_FREE_SPACE_INFO_KEY]     = "FREE_SPACE_INFO",
 641                 [BTRFS_FREE_SPACE_EXTENT_KEY]   = "FREE_SPACE_EXTENT",
 642                 [BTRFS_FREE_SPACE_BITMAP_KEY]   = "FREE_SPACE_BITMAP",
 643                 [BTRFS_CHUNK_ITEM_KEY]          = "CHUNK_ITEM",
 644                 [BTRFS_DEV_ITEM_KEY]            = "DEV_ITEM",
 645                 [BTRFS_DEV_EXTENT_KEY]          = "DEV_EXTENT",
 646                 [BTRFS_TEMPORARY_ITEM_KEY]      = "TEMPORARY_ITEM",
 647                 [BTRFS_DEV_REPLACE_KEY]         = "DEV_REPLACE",
 648                 [BTRFS_STRING_ITEM_KEY]         = "STRING_ITEM",
 649                 [BTRFS_QGROUP_STATUS_KEY]       = "QGROUP_STATUS",
 650                 [BTRFS_QGROUP_RELATION_KEY]     = "QGROUP_RELATION",
 651                 [BTRFS_QGROUP_INFO_KEY]         = "QGROUP_INFO",
 652                 [BTRFS_QGROUP_LIMIT_KEY]        = "QGROUP_LIMIT",
 653                 [BTRFS_PERSISTENT_ITEM_KEY]     = "PERSISTENT_ITEM",
 654                 [BTRFS_UUID_KEY_SUBVOL]         = "UUID_KEY_SUBVOL",
 655                 [BTRFS_UUID_KEY_RECEIVED_SUBVOL] = "UUID_KEY_RECEIVED_SUBVOL",
 656         };
 657
 658         if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID) {
 659                 fprintf(stream, "UNTYPED");
 660                 return;
 661         }
 662
 663
 664         if (key_to_str[type])
 665                 fputs(key_to_str[type], stream);
 666         else
 667                 fprintf(stream, "UNKNOWN.%d", type);
 668 }
 669
 670 void print_objectid(FILE *stream, u64 objectid, u8 type)
 671 {
 672         switch (type) {
 673         case BTRFS_DEV_EXTENT_KEY:
 674                 /* device id */
 675                 fprintf(stream, "%llu", (unsigned long long)objectid);
 676                 return;
 677         case BTRFS_QGROUP_RELATION_KEY:
 678                 fprintf(stream, "%llu/%llu", btrfs_qgroup_level(objectid),
 679                        btrfs_qgroup_subvid(objectid));
 680                 return;
 681         case BTRFS_UUID_KEY_SUBVOL:
 682         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 683                 fprintf(stream, "0x%016llx", (unsigned long long)objectid);
 684                 return;
 685         }
 686
 687         switch (objectid) {
 688         case BTRFS_ROOT_TREE_OBJECTID:
 689                 if (type == BTRFS_DEV_ITEM_KEY)
 690                         fprintf(stream, "DEV_ITEMS");
 691                 else
 692                         fprintf(stream, "ROOT_TREE");
 693                 break;
 694         case BTRFS_EXTENT_TREE_OBJECTID:
 695                 fprintf(stream, "EXTENT_TREE");
 696                 break;
 697         case BTRFS_CHUNK_TREE_OBJECTID:
 698                 fprintf(stream, "CHUNK_TREE");
 699                 break;
 700         case BTRFS_DEV_TREE_OBJECTID:
 701                 fprintf(stream, "DEV_TREE");
 702                 break;
 703         case BTRFS_FS_TREE_OBJECTID:
 704                 fprintf(stream, "FS_TREE");
 705                 break;
 706         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 707                 fprintf(stream, "ROOT_TREE_DIR");
 708                 break;
 709         case BTRFS_CSUM_TREE_OBJECTID:
 710                 fprintf(stream, "CSUM_TREE");
 711                 break;
 712         case BTRFS_BALANCE_OBJECTID:
 713                 fprintf(stream, "BALANCE");
 714                 break;
 715         case BTRFS_ORPHAN_OBJECTID:
 716                 fprintf(stream, "ORPHAN");
 717                 break;
 718         case BTRFS_TREE_LOG_OBJECTID:
 719                 fprintf(stream, "TREE_LOG");
 720                 break;
 721         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 722                 fprintf(stream, "LOG_FIXUP");
 723                 break;
 724         case BTRFS_TREE_RELOC_OBJECTID:
 725                 fprintf(stream, "TREE_RELOC");
 726                 break;
 727         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 728                 fprintf(stream, "DATA_RELOC_TREE");
 729                 break;
 730         case BTRFS_EXTENT_CSUM_OBJECTID:
 731                 fprintf(stream, "EXTENT_CSUM");
 732                 break;
 733         case BTRFS_FREE_SPACE_OBJECTID:
 734                 fprintf(stream, "FREE_SPACE");
 735                 break;
 736         case BTRFS_FREE_INO_OBJECTID:
 737                 fprintf(stream, "FREE_INO");
 738                 break;
 739         case BTRFS_QUOTA_TREE_OBJECTID:
 740                 fprintf(stream, "QUOTA_TREE");
 741                 break;
 742         case BTRFS_UUID_TREE_OBJECTID:
 743                 fprintf(stream, "UUID_TREE");
 744                 break;
 745         case BTRFS_FREE_SPACE_TREE_OBJECTID:
 746                 fprintf(stream, "FREE_SPACE_TREE");
 747                 break;
 748         case BTRFS_MULTIPLE_OBJECTIDS:
 749                 fprintf(stream, "MULTIPLE");
 750                 break;
 751         case (u64)-1:
 752                 fprintf(stream, "-1");
 753                 break;
 754         case BTRFS_FIRST_CHUNK_TREE_OBJECTID:
 755                 if (type == BTRFS_CHUNK_ITEM_KEY) {
 756                         fprintf(stream, "FIRST_CHUNK_TREE");
 757                         break;
 758                 }
 759                 /* fall-thru */
 760         default:
 761                 fprintf(stream, "%llu", (unsigned long long)objectid);
 762         }
 763 }
 764
 765 void btrfs_print_key(struct btrfs_disk_key *disk_key)
 766 {
 767         u64 objectid = btrfs_disk_key_objectid(disk_key);
 768         u8 type = btrfs_disk_key_type(disk_key);
 769         u64 offset = btrfs_disk_key_offset(disk_key);
 770
 771         printf("key (");
 772         print_objectid(stdout, objectid, type);
 773         printf(" ");
 774         print_key_type(stdout, objectid, type);
 775         switch (type) {
 776         case BTRFS_QGROUP_RELATION_KEY:
 777         case BTRFS_QGROUP_INFO_KEY:
 778         case BTRFS_QGROUP_LIMIT_KEY:
 779                 printf(" %llu/%llu)", btrfs_qgroup_level(offset),
 780                        btrfs_qgroup_subvid(offset));
 781                 break;
 782         case BTRFS_UUID_KEY_SUBVOL:
 783         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 784                 printf(" 0x%016llx)", (unsigned long long)offset);
 785                 break;
 786         default:
 787                 if (offset == (u64)-1)
 788                         printf(" -1)");
 789                 else
 790                         printf(" %llu)", (unsigned long long)offset);
 791                 break;
 792         }
 793 }
 794
 795 static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
 796                             u32 item_size)
 797 {
 798         if (item_size & (sizeof(u64) - 1)) {
 799                 printf("btrfs: uuid item with illegal size %lu!\n",
 800                        (unsigned long)item_size);
 801                 return;
 802         }
 803         while (item_size) {
 804                 __le64 subvol_id;
 805
 806                 read_extent_buffer(l, &subvol_id, offset, sizeof(u64));
 807                 printf("\t\tsubvol_id %llu\n",
 808                         (unsigned long long)le64_to_cpu(subvol_id));
 809                 item_size -= sizeof(u64);
 810                 offset += sizeof(u64);
 811         }
 812 }
 813
 814 /* Btrfs inode flag stringification helper */
 815 #define STRCAT_ONE_INODE_FLAG(flags, name, empty, dst) ({                       \
 816         if (flags & BTRFS_INODE_##name) {                               \
 817                 if (!empty)                                             \
 818                         strcat(dst, "|");                               \
 819                 strcat(dst, #name);                                     \
 820                 empty = 0;                                              \
 821         }                                                               \
 822 })
 823
 824 /*
 825  * Caller should ensure sizeof(*ret) >= 102: all charactors plus '|' of
 826  * BTRFS_INODE_* flags
 827  */
 828 static void inode_flags_to_str(u64 flags, char *ret)
 829 {
 830         int empty = 1;
 831
 832         STRCAT_ONE_INODE_FLAG(flags, NODATASUM, empty, ret);
 833         STRCAT_ONE_INODE_FLAG(flags, NODATACOW, empty, ret);
 834         STRCAT_ONE_INODE_FLAG(flags, READONLY, empty, ret);
 835         STRCAT_ONE_INODE_FLAG(flags, NOCOMPRESS, empty, ret);
 836         STRCAT_ONE_INODE_FLAG(flags, PREALLOC, empty, ret);
 837         STRCAT_ONE_INODE_FLAG(flags, SYNC, empty, ret);
 838         STRCAT_ONE_INODE_FLAG(flags, IMMUTABLE, empty, ret);
 839         STRCAT_ONE_INODE_FLAG(flags, APPEND, empty, ret);
 840         STRCAT_ONE_INODE_FLAG(flags, NODUMP, empty, ret);
 841         STRCAT_ONE_INODE_FLAG(flags, NOATIME, empty, ret);
 842         STRCAT_ONE_INODE_FLAG(flags, DIRSYNC, empty, ret);
 843         STRCAT_ONE_INODE_FLAG(flags, COMPRESS, empty, ret);
 844         if (empty)
 845                 strcat(ret, "none");
 846 }
 847
 848 static void print_timespec(struct extent_buffer *eb,
 849                 struct btrfs_timespec *timespec, const char *prefix,
 850                 const char *suffix)
 851 {
 852         struct tm tm;
 853         u64 tmp_u64;
 854         u32 tmp_u32;
 855         time_t tmp_time;
 856         char timestamp[256];
 857
 858         tmp_u64 = btrfs_timespec_sec(eb, timespec);
 859         tmp_u32 = btrfs_timespec_nsec(eb, timespec);
 860         tmp_time = tmp_u64;
 861         localtime_r(&tmp_time, &tm);
 862         strftime(timestamp, sizeof(timestamp),
 863                         "%Y-%m-%d %H:%M:%S", &tm);
 864         printf("%s%llu.%u (%s)%s", prefix, (unsigned long long)tmp_u64, tmp_u32,
 865                         timestamp, suffix);
 866 }
 867
 868 static void print_inode_item(struct extent_buffer *eb,
 869                 struct btrfs_inode_item *ii)
 870 {
 871         char flags_str[256];
 872
 873         memset(flags_str, 0, sizeof(flags_str));
 874         inode_flags_to_str(btrfs_inode_flags(eb, ii), flags_str);
 875         printf("\t\tgeneration %llu transid %llu size %llu nbytes %llu\n"
 876                "\t\tblock group %llu mode %o links %u uid %u gid %u rdev %llu\n"
 877                "\t\tsequence %llu flags 0x%llx(%s)\n",
 878                (unsigned long long)btrfs_inode_generation(eb, ii),
 879                (unsigned long long)btrfs_inode_transid(eb, ii),
 880                (unsigned long long)btrfs_inode_size(eb, ii),
 881                (unsigned long long)btrfs_inode_nbytes(eb, ii),
 882                (unsigned long long)btrfs_inode_block_group(eb,ii),
 883                btrfs_inode_mode(eb, ii),
 884                btrfs_inode_nlink(eb, ii),
 885                btrfs_inode_uid(eb, ii),
 886                btrfs_inode_gid(eb, ii),
 887                (unsigned long long)btrfs_inode_rdev(eb,ii),
 888                (unsigned long long)btrfs_inode_flags(eb,ii),
 889                (unsigned long long)btrfs_inode_sequence(eb, ii),
 890                flags_str);
 891         print_timespec(eb, btrfs_inode_atime(ii), "\t\tatime ", "\n");
 892         print_timespec(eb, btrfs_inode_ctime(ii), "\t\tctime ", "\n");
 893         print_timespec(eb, btrfs_inode_mtime(ii), "\t\tmtime ", "\n");
 894         print_timespec(eb, btrfs_inode_otime(ii), "\t\totime ", "\n");
 895 }
 896
 897 static void print_disk_balance_args(struct btrfs_disk_balance_args *ba)
 898 {
 899         printf("\t\tprofiles %llu devid %llu target %llu flags %llu\n",
 900                         (unsigned long long)le64_to_cpu(ba->profiles),
 901                         (unsigned long long)le64_to_cpu(ba->devid),
 902                         (unsigned long long)le64_to_cpu(ba->target),
 903                         (unsigned long long)le64_to_cpu(ba->flags));
 904         printf("\t\tusage_min %u usage_max %u pstart %llu pend %llu\n",
 905                         le32_to_cpu(ba->usage_min),
 906                         le32_to_cpu(ba->usage_max),
 907                         (unsigned long long)le64_to_cpu(ba->pstart),
 908                         (unsigned long long)le64_to_cpu(ba->pend));
 909         printf("\t\tvstart %llu vend %llu limit_min %u limit_max %u\n",
 910                         (unsigned long long)le64_to_cpu(ba->vstart),
 911                         (unsigned long long)le64_to_cpu(ba->vend),
 912                         le32_to_cpu(ba->limit_min),
 913                         le32_to_cpu(ba->limit_max));
 914         printf("\t\tstripes_min %u stripes_max %u\n",
 915                         le32_to_cpu(ba->stripes_min),
 916                         le32_to_cpu(ba->stripes_max));
 917 }
 918
 919 static void print_balance_item(struct extent_buffer *eb,
 920                 struct btrfs_balance_item *bi)
 921 {
 922         printf("\t\tbalance status flags %llu\n",
 923                         btrfs_balance_item_flags(eb, bi));
 924
 925         printf("\t\tDATA\n");
 926         print_disk_balance_args(btrfs_balance_item_data(eb, bi));
 927         printf("\t\tMETADATA\n");
 928         print_disk_balance_args(btrfs_balance_item_meta(eb, bi));
 929         printf("\t\tSYSTEM\n");
 930         print_disk_balance_args(btrfs_balance_item_sys(eb, bi));
 931 }
 932
 933 static void print_dev_stats(struct extent_buffer *eb,
 934                 struct btrfs_dev_stats_item *stats, u32 size)
 935 {
 936         int i;
 937         u32 known = BTRFS_DEV_STAT_VALUES_MAX * sizeof(__le64);
 938         __le64 *values = btrfs_dev_stats_values(eb, stats);
 939
 940         printf("\t\tdevice stats\n");
 941         printf("\t\twrite_errs %llu read_errs %llu flush_errs %llu corruption_errs %llu generation %llu\n",
 942                 (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_WRITE_ERRS]),
 943                 (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_READ_ERRS]),
 944                 (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_FLUSH_ERRS]),
 945                 (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_CORRUPTION_ERRS]),
 946                 (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_GENERATION_ERRS]));
 947
 948         if (known < size) {
 949                 printf("\t\tunknown stats item bytes %u", size - known);
 950                 for (i = BTRFS_DEV_STAT_VALUES_MAX; i * sizeof(__le64) < size; i++) {
 951                         printf("\t\tunknown item %u offset %zu value %llu\n",
 952                                 i, i * sizeof(__le64),
 953                                 (unsigned long long)le64_to_cpu(values[i]));
 954                 }
 955         }
 956 }
 957
 958 static void print_block_group_item(struct extent_buffer *eb,
 959                 struct btrfs_block_group_item *bgi)
 960 {
 961         struct btrfs_block_group_item bg_item;
 962         char flags_str[256];
 963
 964         read_extent_buffer(eb, &bg_item, (unsigned long)bgi, sizeof(bg_item));
 965         memset(flags_str, 0, sizeof(flags_str));
 966         bg_flags_to_str(btrfs_block_group_flags(&bg_item), flags_str);
 967         printf("\t\tblock group used %llu chunk_objectid %llu flags %s\n",
 968                 (unsigned long long)btrfs_block_group_used(&bg_item),
 969                 (unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
 970                 flags_str);
 971 }
 972
 973 static void print_extent_data_ref(struct extent_buffer *eb, int slot)
 974 {
 975         struct btrfs_extent_data_ref *dref;
 976
 977         dref = btrfs_item_ptr(eb, slot, struct btrfs_extent_data_ref);
 978         printf("\t\textent data backref root %llu "
 979                 "objectid %llu offset %llu count %u\n",
 980                 (unsigned long long)btrfs_extent_data_ref_root(eb, dref),
 981                 (unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
 982                 (unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
 983                 btrfs_extent_data_ref_count(eb, dref));
 984 }
 985
 986 static void print_shared_data_ref(struct extent_buffer *eb, int slot)
 987 {
 988         struct btrfs_shared_data_ref *sref;
 989
 990         sref = btrfs_item_ptr(eb, slot, struct btrfs_shared_data_ref);
 991         printf("\t\tshared data backref count %u\n",
 992                 btrfs_shared_data_ref_count(eb, sref));
 993 }
 994
 995 static void print_free_space_info(struct extent_buffer *eb, int slot)
 996 {
 997         struct btrfs_free_space_info *free_info;
 998
 999         free_info = btrfs_item_ptr(eb, slot, struct btrfs_free_space_info);
1000         printf("\t\tfree space info extent count %u flags %u\n",
1001                 (unsigned)btrfs_free_space_extent_count(eb, free_info),
1002                 (unsigned)btrfs_free_space_flags(eb, free_info));
1003 }
1004
1005 static void print_dev_extent(struct extent_buffer *eb, int slot)
1006 {
1007         struct btrfs_dev_extent *dev_extent;
1008         u8 uuid[BTRFS_UUID_SIZE];
1009         char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
1010
1011         dev_extent = btrfs_item_ptr(eb, slot, struct btrfs_dev_extent);
1012         read_extent_buffer(eb, uuid,
1013                 (unsigned long)btrfs_dev_extent_chunk_tree_uuid(dev_extent),
1014                 BTRFS_UUID_SIZE);
1015         uuid_unparse(uuid, uuid_str);
1016         printf("\t\tdev extent chunk_tree %llu\n"
1017                 "\t\tchunk_objectid %llu chunk_offset %llu "
1018                 "length %llu\n"
1019                 "\t\tchunk_tree_uuid %s\n",
1020                 (unsigned long long)btrfs_dev_extent_chunk_tree(eb, dev_extent),
1021                 (unsigned long long)btrfs_dev_extent_chunk_objectid(eb, dev_extent),
1022                 (unsigned long long)btrfs_dev_extent_chunk_offset(eb, dev_extent),
1023                 (unsigned long long)btrfs_dev_extent_length(eb, dev_extent),
1024                 uuid_str);
1025 }
1026
1027 static void print_qgroup_status(struct extent_buffer *eb, int slot)
1028 {
1029         struct btrfs_qgroup_status_item *qg_status;
1030         char flags_str[256];
1031
1032         qg_status = btrfs_item_ptr(eb, slot, struct btrfs_qgroup_status_item);
1033         memset(flags_str, 0, sizeof(flags_str));
1034         qgroup_flags_to_str(btrfs_qgroup_status_flags(eb, qg_status),
1035                                         flags_str);
1036         printf("\t\tversion %llu generation %llu flags %s scan %lld\n",
1037                 (unsigned long long)btrfs_qgroup_status_version(eb, qg_status),
1038                 (unsigned long long)btrfs_qgroup_status_generation(eb, qg_status),
1039                 flags_str,
1040                 (unsigned long long)btrfs_qgroup_status_rescan(eb, qg_status));
1041 }
1042
1043 static void print_qgroup_info(struct extent_buffer *eb, int slot)
1044 {
1045         struct btrfs_qgroup_info_item *qg_info;
1046
1047         qg_info = btrfs_item_ptr(eb, slot, struct btrfs_qgroup_info_item);
1048         printf("\t\tgeneration %llu\n"
1049                 "\t\treferenced %llu referenced_compressed %llu\n"
1050                 "\t\texclusive %llu exclusive_compressed %llu\n",
1051                 (unsigned long long)btrfs_qgroup_info_generation(eb, qg_info),
1052                 (unsigned long long)btrfs_qgroup_info_referenced(eb, qg_info),
1053                 (unsigned long long)btrfs_qgroup_info_referenced_compressed(eb,
1054                                                                        qg_info),
1055                 (unsigned long long)btrfs_qgroup_info_exclusive(eb, qg_info),
1056                 (unsigned long long)btrfs_qgroup_info_exclusive_compressed(eb,
1057                                                                       qg_info));
1058 }
1059
1060 static void print_qgroup_limit(struct extent_buffer *eb, int slot)
1061 {
1062         struct btrfs_qgroup_limit_item *qg_limit;
1063
1064         qg_limit = btrfs_item_ptr(eb, slot, struct btrfs_qgroup_limit_item);
1065         printf("\t\tflags %llx\n"
1066                 "\t\tmax_referenced %lld max_exclusive %lld\n"
1067                 "\t\trsv_referenced %lld rsv_exclusive %lld\n",
1068                 (unsigned long long)btrfs_qgroup_limit_flags(eb, qg_limit),
1069                 (long long)btrfs_qgroup_limit_max_referenced(eb, qg_limit),
1070                 (long long)btrfs_qgroup_limit_max_exclusive(eb, qg_limit),
1071                 (long long)btrfs_qgroup_limit_rsv_referenced(eb, qg_limit),
1072                 (long long)btrfs_qgroup_limit_rsv_exclusive(eb, qg_limit));
1073 }
1074
1075 static void print_persistent_item(struct extent_buffer *eb, void *ptr,
1076                 u32 item_size, u64 objectid, u64 offset)
1077 {
1078         printf("\t\tpersistent item objectid ");
1079         print_objectid(stdout, objectid, BTRFS_PERSISTENT_ITEM_KEY);
1080         printf(" offset %llu\n", (unsigned long long)offset);
1081         switch (objectid) {
1082         case BTRFS_DEV_STATS_OBJECTID:
1083                 print_dev_stats(eb, ptr, item_size);
1084                 break;
1085         default:
1086                 printf("\t\tunknown persistent item objectid %llu\n", objectid);
1087         }
1088 }
1089
1090 static void print_temporary_item(struct extent_buffer *eb, void *ptr,
1091                 u64 objectid, u64 offset)
1092 {
1093         printf("\t\ttemporary item objectid ");
1094         print_objectid(stdout, objectid, BTRFS_TEMPORARY_ITEM_KEY);
1095         printf(" offset %llu\n", (unsigned long long)offset);
1096         switch (objectid) {
1097         case BTRFS_BALANCE_OBJECTID:
1098                 print_balance_item(eb, ptr);
1099                 break;
1100         default:
1101                 printf("\t\tunknown temporary item objectid %llu\n", objectid);
1102         }
1103 }
1104
1105 static void print_extent_csum(struct extent_buffer *eb,
1106                 struct btrfs_fs_info *fs_info, u32 item_size, u64 start)
1107 {
1108         u32 size;
1109
1110         size = (item_size / btrfs_super_csum_size(fs_info->super_copy)) *
1111                         fs_info->sectorsize;
1112         printf("\t\trange start %llu end %llu length %u\n",
1113                         (unsigned long long)start,
1114                         (unsigned long long)start + size, size);
1115 }
1116
1117 /* Caller must ensure sizeof(*ret) >= 14 "WRITTEN|RELOC" */
1118 static void header_flags_to_str(u64 flags, char *ret)
1119 {
1120         int empty = 1;
1121
1122         if (flags & BTRFS_HEADER_FLAG_WRITTEN) {
1123                 empty = 0;
1124                 strcpy(ret, "WRITTEN");
1125         }
1126         if (flags & BTRFS_HEADER_FLAG_RELOC) {
1127                 if (!empty)
1128                         strcat(ret, "|");
1129                 strcat(ret, "RELOC");
1130         }
1131 }
1132
1133 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *eb)
1134 {
1135         struct btrfs_item *item;
1136         struct btrfs_disk_key disk_key;
1137         char flags_str[128];
1138         u32 i;
1139         u32 nr;
1140         u64 flags;
1141         u8 backref_rev;
1142
1143         flags = btrfs_header_flags(eb) & ~BTRFS_BACKREF_REV_MASK;
1144         backref_rev = btrfs_header_flags(eb) >> BTRFS_BACKREF_REV_SHIFT;
1145         header_flags_to_str(flags, flags_str);
1146         nr = btrfs_header_nritems(eb);
1147
1148         printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
1149                 (unsigned long long)btrfs_header_bytenr(eb), nr,
1150                 btrfs_leaf_free_space(root, eb),
1151                 (unsigned long long)btrfs_header_generation(eb),
1152                 (unsigned long long)btrfs_header_owner(eb));
1153         printf("leaf %llu flags 0x%llx(%s) backref revision %d\n",
1154                 btrfs_header_bytenr(eb), flags, flags_str, backref_rev);
1155         print_uuids(eb);
1156         fflush(stdout);
1157
1158         for (i = 0; i < nr; i++) {
1159                 u32 item_size;
1160                 void *ptr;
1161                 u64 objectid;
1162                 u32 type;
1163                 u64 offset;
1164
1165                 item = btrfs_item_nr(i);
1166                 item_size = btrfs_item_size(eb, item);
1167                 /* Untyped extraction of slot from btrfs_item_ptr */
1168                 ptr = btrfs_item_ptr(eb, i, void*);
1169
1170                 btrfs_item_key(eb, &disk_key, i);
1171                 objectid = btrfs_disk_key_objectid(&disk_key);
1172                 type = btrfs_disk_key_type(&disk_key);
1173                 offset = btrfs_disk_key_offset(&disk_key);
1174
1175                 printf("\titem %d ", i);
1176                 btrfs_print_key(&disk_key);
1177                 printf(" itemoff %d itemsize %d\n",
1178                         btrfs_item_offset(eb, item),
1179                         btrfs_item_size(eb, item));
1180
1181                 if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID)
1182                         print_free_space_header(eb, i);
1183
1184                 switch (type) {
1185                 case BTRFS_INODE_ITEM_KEY:
1186                         print_inode_item(eb, ptr);
1187                         break;
1188                 case BTRFS_INODE_REF_KEY:
1189                         print_inode_ref_item(eb, item_size, ptr);
1190                         break;
1191                 case BTRFS_INODE_EXTREF_KEY:
1192                         print_inode_extref_item(eb, item_size, ptr);
1193                         break;
1194                 case BTRFS_DIR_ITEM_KEY:
1195                 case BTRFS_DIR_INDEX_KEY:
1196                 case BTRFS_XATTR_ITEM_KEY:
1197                         print_dir_item(eb, item_size, ptr);
1198                         break;
1199                 case BTRFS_DIR_LOG_INDEX_KEY:
1200                 case BTRFS_DIR_LOG_ITEM_KEY: {
1201                         struct btrfs_dir_log_item *dlog;
1202
1203                         dlog = btrfs_item_ptr(eb, i, struct btrfs_dir_log_item);
1204                         printf("\t\tdir log end %Lu\n",
1205                                (unsigned long long)btrfs_dir_log_end(eb, dlog));
1206                         break;
1207                         }
1208                 case BTRFS_ORPHAN_ITEM_KEY:
1209                         printf("\t\torphan item\n");
1210                         break;
1211                 case BTRFS_ROOT_ITEM_KEY:
1212                         print_root_item(eb, i);
1213                         break;
1214                 case BTRFS_ROOT_REF_KEY:
1215                         print_root_ref(eb, i, "ref");
1216                         break;
1217                 case BTRFS_ROOT_BACKREF_KEY:
1218                         print_root_ref(eb, i, "backref");
1219                         break;
1220                 case BTRFS_EXTENT_ITEM_KEY:
1221                         print_extent_item(eb, i, 0);
1222                         break;
1223                 case BTRFS_METADATA_ITEM_KEY:
1224                         print_extent_item(eb, i, 1);
1225                         break;
1226                 case BTRFS_TREE_BLOCK_REF_KEY:
1227                         printf("\t\ttree block backref\n");
1228                         break;
1229                 case BTRFS_SHARED_BLOCK_REF_KEY:
1230                         printf("\t\tshared block backref\n");
1231                         break;
1232                 case BTRFS_EXTENT_DATA_REF_KEY:
1233                         print_extent_data_ref(eb, i);
1234                         break;
1235                 case BTRFS_SHARED_DATA_REF_KEY:
1236                         print_shared_data_ref(eb, i);
1237                         break;
1238                 case BTRFS_EXTENT_REF_V0_KEY:
1239 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
1240                         print_extent_ref_v0(eb, i);
1241 #else
1242                         BUG();
1243 #endif
1244                         break;
1245                 case BTRFS_CSUM_ITEM_KEY:
1246                         printf("\t\tcsum item\n");
1247                         break;
1248                 case BTRFS_EXTENT_CSUM_KEY:
1249                         print_extent_csum(eb, root->fs_info, item_size,
1250                                         disk_key.offset);
1251                         break;
1252                 case BTRFS_EXTENT_DATA_KEY:
1253                         print_file_extent_item(eb, item, i, ptr);
1254                         break;
1255                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
1256                         print_block_group_item(eb, ptr);
1257                         break;
1258                 case BTRFS_FREE_SPACE_INFO_KEY:
1259                         print_free_space_info(eb, i);
1260                         break;
1261                 case BTRFS_FREE_SPACE_EXTENT_KEY:
1262                         printf("\t\tfree space extent\n");
1263                         break;
1264                 case BTRFS_FREE_SPACE_BITMAP_KEY:
1265                         printf("\t\tfree space bitmap\n");
1266                         break;
1267                 case BTRFS_CHUNK_ITEM_KEY:
1268                         print_chunk_item(eb, ptr);
1269                         break;
1270                 case BTRFS_DEV_ITEM_KEY:
1271                         print_dev_item(eb, ptr);
1272                         break;
1273                 case BTRFS_DEV_EXTENT_KEY:
1274                         print_dev_extent(eb, i);
1275                         break;
1276                 case BTRFS_QGROUP_STATUS_KEY:
1277                         print_qgroup_status(eb, i);
1278                         break;
1279                 case BTRFS_QGROUP_RELATION_KEY:
1280                         break;
1281                 case BTRFS_QGROUP_INFO_KEY:
1282                         print_qgroup_info(eb, i);
1283                         break;
1284                 case BTRFS_QGROUP_LIMIT_KEY:
1285                         print_qgroup_limit(eb, i);
1286                         break;
1287                 case BTRFS_UUID_KEY_SUBVOL:
1288                 case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
1289                         print_uuid_item(eb, btrfs_item_ptr_offset(eb, i),
1290                                         btrfs_item_size_nr(eb, i));
1291                         break;
1292                 case BTRFS_STRING_ITEM_KEY: {
1293                         const char *str = eb->data + btrfs_item_ptr_offset(eb, i);
1294
1295                         printf("\t\titem data %.*s\n", item_size, str);
1296                         break;
1297                         }
1298                 case BTRFS_PERSISTENT_ITEM_KEY:
1299                         print_persistent_item(eb, ptr, item_size, objectid,
1300                                         offset);
1301                         break;
1302                 case BTRFS_TEMPORARY_ITEM_KEY:
1303                         print_temporary_item(eb, ptr, objectid, offset);
1304                         break;
1305                 };
1306                 fflush(stdout);
1307         }
1308 }
1309
1310 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb, int follow)
1311 {
1312         u32 i;
1313         u32 nr;
1314         struct btrfs_disk_key disk_key;
1315         struct btrfs_key key;
1316         struct extent_buffer *next;
1317
1318         if (!eb)
1319                 return;
1320         nr = btrfs_header_nritems(eb);
1321         if (btrfs_is_leaf(eb)) {
1322                 btrfs_print_leaf(root, eb);
1323                 return;
1324         }
1325         printf("node %llu level %d items %d free %u generation %llu owner %llu\n",
1326                (unsigned long long)eb->start,
1327                 btrfs_header_level(eb), nr,
1328                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
1329                 (unsigned long long)btrfs_header_generation(eb),
1330                 (unsigned long long)btrfs_header_owner(eb));
1331         print_uuids(eb);
1332         fflush(stdout);
1333         for (i = 0; i < nr; i++) {
1334                 u64 blocknr = btrfs_node_blockptr(eb, i);
1335                 btrfs_node_key(eb, &disk_key, i);
1336                 btrfs_disk_key_to_cpu(&key, &disk_key);
1337                 printf("\t");
1338                 btrfs_print_key(&disk_key);
1339                 printf(" block %llu (%llu) gen %llu\n",
1340                        (unsigned long long)blocknr,
1341                        (unsigned long long)blocknr / root->fs_info->nodesize,
1342                        (unsigned long long)btrfs_node_ptr_generation(eb, i));
1343                 fflush(stdout);
1344         }
1345         if (!follow)
1346                 return;
1347
1348         for (i = 0; i < nr; i++) {
1349                 next = read_tree_block(root->fs_info,
1350                                 btrfs_node_blockptr(eb, i),
1351                                 btrfs_node_ptr_generation(eb, i));
1352                 if (!extent_buffer_uptodate(next)) {
1353                         fprintf(stderr, "failed to read %llu in tree %llu\n",
1354                                 (unsigned long long)btrfs_node_blockptr(eb, i),
1355                                 (unsigned long long)btrfs_header_owner(eb));
1356                         continue;
1357                 }
1358                 if (btrfs_is_leaf(next) && btrfs_header_level(eb) != 1) {
1359                         warning(
1360         "eb corrupted: item %d eb level %d next level %d, skipping the rest",
1361                                 i, btrfs_header_level(next),
1362                                 btrfs_header_level(eb));
1363                         goto out;
1364                 }
1365                 if (btrfs_header_level(next) != btrfs_header_level(eb) - 1) {
1366                         warning(
1367         "eb corrupted: item %d eb level %d next level %d, skipping the rest",
1368                                 i, btrfs_header_level(next),
1369                                 btrfs_header_level(eb));
1370                         goto out;
1371                 }
1372                 btrfs_print_tree(root, next, 1);
1373                 free_extent_buffer(next);
1374         }
1375
1376         return;
1377
1378 out:
1379         free_extent_buffer(next);
1380 }