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;
 202         char chunk_flags_str[32] = {0};
 203
 204         /* The chunk must contain at least one stripe */
 205         if (num_stripes < 1) {
 206                 printf("invalid num_stripes: %u\n", num_stripes);
 207                 return;
 208         }
 209
 210         chunk_item_size = btrfs_chunk_item_size(num_stripes);
 211
 212         if ((unsigned long)chunk + chunk_item_size > eb->len) {
 213                 printf("\t\tchunk item invalid\n");
 214                 return;
 215         }
 216
 217         bg_flags_to_str(btrfs_chunk_type(eb, chunk), chunk_flags_str);
 218         printf("\t\tlength %llu owner %llu stripe_len %llu type %s\n",
 219                (unsigned long long)btrfs_chunk_length(eb, chunk),
 220                (unsigned long long)btrfs_chunk_owner(eb, chunk),
 221                (unsigned long long)btrfs_chunk_stripe_len(eb, chunk),
 222                 chunk_flags_str);
 223         printf("\t\tio_align %u io_width %u sector_size %u\n",
 224                         btrfs_chunk_io_align(eb, chunk),
 225                         btrfs_chunk_io_width(eb, chunk),
 226                         btrfs_chunk_sector_size(eb, chunk));
 227         printf("\t\tnum_stripes %hu sub_stripes %hu\n", num_stripes,
 228                         btrfs_chunk_sub_stripes(eb, chunk));
 229         for (i = 0 ; i < num_stripes ; i++) {
 230                 unsigned char dev_uuid[BTRFS_UUID_SIZE];
 231                 char str_dev_uuid[BTRFS_UUID_UNPARSED_SIZE];
 232                 u64 uuid_offset;
 233                 u64 stripe_offset;
 234
 235                 uuid_offset = (unsigned long)btrfs_stripe_dev_uuid_nr(chunk, i);
 236                 stripe_offset = (unsigned long)btrfs_stripe_nr(chunk, i);
 237
 238                 if (uuid_offset < stripe_offset ||
 239                         (uuid_offset + BTRFS_UUID_SIZE) >
 240                                 (stripe_offset + sizeof(struct btrfs_stripe))) {
 241                         printf("\t\t\tstripe %d invalid\n", i);
 242                         break;
 243                 }
 244
 245                 read_extent_buffer(eb, dev_uuid,
 246                         uuid_offset,
 247                         BTRFS_UUID_SIZE);
 248                 uuid_unparse(dev_uuid, str_dev_uuid);
 249                 printf("\t\t\tstripe %d devid %llu offset %llu\n", i,
 250                       (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
 251                       (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
 252                 printf("\t\t\tdev_uuid %s\n", str_dev_uuid);
 253         }
 254 }
 255
 256 static void print_dev_item(struct extent_buffer *eb,
 257                            struct btrfs_dev_item *dev_item)
 258 {
 259         char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
 260         char fsid_str[BTRFS_UUID_UNPARSED_SIZE];
 261         u8 uuid[BTRFS_UUID_SIZE];
 262         u8 fsid[BTRFS_UUID_SIZE];
 263
 264         read_extent_buffer(eb, uuid,
 265                            (unsigned long)btrfs_device_uuid(dev_item),
 266                            BTRFS_UUID_SIZE);
 267         uuid_unparse(uuid, uuid_str);
 268         read_extent_buffer(eb, fsid,
 269                            (unsigned long)btrfs_device_fsid(dev_item),
 270                            BTRFS_UUID_SIZE);
 271         uuid_unparse(fsid, fsid_str);
 272         printf("\t\tdevid %llu total_bytes %llu bytes_used %Lu\n"
 273                "\t\tio_align %u io_width %u sector_size %u type %llu\n"
 274                "\t\tgeneration %llu start_offset %llu dev_group %u\n"
 275                "\t\tseek_speed %hhu bandwidth %hhu\n"
 276                "\t\tuuid %s\n"
 277                "\t\tfsid %s\n",
 278                (unsigned long long)btrfs_device_id(eb, dev_item),
 279                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
 280                (unsigned long long)btrfs_device_bytes_used(eb, dev_item),
 281                btrfs_device_io_align(eb, dev_item),
 282                btrfs_device_io_width(eb, dev_item),
 283                btrfs_device_sector_size(eb, dev_item),
 284                (unsigned long long)btrfs_device_type(eb, dev_item),
 285                (unsigned long long)btrfs_device_generation(eb, dev_item),
 286                (unsigned long long)btrfs_device_start_offset(eb, dev_item),
 287                btrfs_device_group(eb, dev_item),
 288                btrfs_device_seek_speed(eb, dev_item),
 289                btrfs_device_bandwidth(eb, dev_item),
 290                uuid_str, fsid_str);
 291 }
 292
 293 static void print_uuids(struct extent_buffer *eb)
 294 {
 295         char fs_uuid[BTRFS_UUID_UNPARSED_SIZE];
 296         char chunk_uuid[BTRFS_UUID_UNPARSED_SIZE];
 297         u8 disk_uuid[BTRFS_UUID_SIZE];
 298
 299         read_extent_buffer(eb, disk_uuid, btrfs_header_fsid(),
 300                            BTRFS_FSID_SIZE);
 301
 302         fs_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 303         uuid_unparse(disk_uuid, fs_uuid);
 304
 305         read_extent_buffer(eb, disk_uuid,
 306                            btrfs_header_chunk_tree_uuid(eb),
 307                            BTRFS_UUID_SIZE);
 308
 309         chunk_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 310         uuid_unparse(disk_uuid, chunk_uuid);
 311         printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
 312 }
 313
 314 static void compress_type_to_str(u8 compress_type, char *ret)
 315 {
 316         switch (compress_type) {
 317         case BTRFS_COMPRESS_NONE:
 318                 strcpy(ret, "none");
 319                 break;
 320         case BTRFS_COMPRESS_ZLIB:
 321                 strcpy(ret, "zlib");
 322                 break;
 323         case BTRFS_COMPRESS_LZO:
 324                 strcpy(ret, "lzo");
 325                 break;
 326         case BTRFS_COMPRESS_ZSTD:
 327                 strcpy(ret, "zstd");
 328                 break;
 329         default:
 330                 sprintf(ret, "UNKNOWN.%d", compress_type);
 331         }
 332 }
 333
 334 static const char* file_extent_type_to_str(u8 type)
 335 {
 336         switch (type) {
 337         case BTRFS_FILE_EXTENT_INLINE: return "inline";
 338         case BTRFS_FILE_EXTENT_PREALLOC: return "prealloc";
 339         case BTRFS_FILE_EXTENT_REG: return "regular";
 340         default: return "unknown";
 341         }
 342 }
 343
 344 static void print_file_extent_item(struct extent_buffer *eb,
 345                                    struct btrfs_item *item,
 346                                    int slot,
 347                                    struct btrfs_file_extent_item *fi)
 348 {
 349         unsigned char extent_type = btrfs_file_extent_type(eb, fi);
 350         char compress_str[16];
 351
 352         compress_type_to_str(btrfs_file_extent_compression(eb, fi),
 353                              compress_str);
 354
 355         printf("\t\tgeneration %llu type %hhu (%s)\n",
 356                         btrfs_file_extent_generation(eb, fi),
 357                         extent_type, file_extent_type_to_str(extent_type));
 358
 359         if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 360                 printf("\t\tinline extent data size %u ram_bytes %u compression %hhu (%s)\n",
 361                                 btrfs_file_extent_inline_item_len(eb, item),
 362                                 btrfs_file_extent_inline_len(eb, slot, fi),
 363                                 btrfs_file_extent_compression(eb, fi),
 364                                 compress_str);
 365                 return;
 366         }
 367         if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
 368                 printf("\t\tprealloc data disk byte %llu nr %llu\n",
 369                   (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 370                   (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 371                 printf("\t\tprealloc data offset %llu nr %llu\n",
 372                   (unsigned long long)btrfs_file_extent_offset(eb, fi),
 373                   (unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
 374                 return;
 375         }
 376         printf("\t\textent data disk byte %llu nr %llu\n",
 377                 (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 378                 (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 379         printf("\t\textent data offset %llu nr %llu ram %llu\n",
 380                 (unsigned long long)btrfs_file_extent_offset(eb, fi),
 381                 (unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
 382                 (unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
 383         printf("\t\textent compression %hhu (%s)\n",
 384                         btrfs_file_extent_compression(eb, fi),
 385                         compress_str);
 386 }
 387
 388 /* Caller should ensure sizeof(*ret) >= 16("DATA|TREE_BLOCK") */
 389 static void extent_flags_to_str(u64 flags, char *ret)
 390 {
 391         int empty = 1;
 392
 393         if (flags & BTRFS_EXTENT_FLAG_DATA) {
 394                 empty = 0;
 395                 strcpy(ret, "DATA");
 396         }
 397         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
 398                 if (!empty) {
 399                         empty = 0;
 400                         strcat(ret, "|");
 401                 }
 402                 strcat(ret, "TREE_BLOCK");
 403         }
 404         if (flags & BTRFS_BLOCK_FLAG_FULL_BACKREF) {
 405                 strcat(ret, "|");
 406                 strcat(ret, "FULL_BACKREF");
 407         }
 408 }
 409
 410 void print_extent_item(struct extent_buffer *eb, int slot, int metadata)
 411 {
 412         struct btrfs_extent_item *ei;
 413         struct btrfs_extent_inline_ref *iref;
 414         struct btrfs_extent_data_ref *dref;
 415         struct btrfs_shared_data_ref *sref;
 416         struct btrfs_disk_key key;
 417         unsigned long end;
 418         unsigned long ptr;
 419         int type;
 420         u32 item_size = btrfs_item_size_nr(eb, slot);
 421         u64 flags;
 422         u64 offset;
 423         char flags_str[32] = {0};
 424
 425         if (item_size < sizeof(*ei)) {
 426 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 427                 struct btrfs_extent_item_v0 *ei0;
 428                 BUG_ON(item_size != sizeof(*ei0));
 429                 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
 430                 printf("\t\trefs %u\n",
 431                        btrfs_extent_refs_v0(eb, ei0));
 432                 return;
 433 #else
 434                 BUG();
 435 #endif
 436         }
 437
 438         ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
 439         flags = btrfs_extent_flags(eb, ei);
 440         extent_flags_to_str(flags, flags_str);
 441
 442         printf("\t\trefs %llu gen %llu flags %s\n",
 443                (unsigned long long)btrfs_extent_refs(eb, ei),
 444                (unsigned long long)btrfs_extent_generation(eb, ei),
 445                flags_str);
 446
 447         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK && !metadata) {
 448                 struct btrfs_tree_block_info *info;
 449                 info = (struct btrfs_tree_block_info *)(ei + 1);
 450                 btrfs_tree_block_key(eb, info, &key);
 451                 printf("\t\ttree block ");
 452                 btrfs_print_key(&key);
 453                 printf(" level %d\n", btrfs_tree_block_level(eb, info));
 454                 iref = (struct btrfs_extent_inline_ref *)(info + 1);
 455         } else if (metadata) {
 456                 struct btrfs_key tmp;
 457
 458                 btrfs_item_key_to_cpu(eb, &tmp, slot);
 459                 printf("\t\ttree block skinny level %d\n", (int)tmp.offset);
 460                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 461         } else{
 462                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 463         }
 464
 465         ptr = (unsigned long)iref;
 466         end = (unsigned long)ei + item_size;
 467         while (ptr < end) {
 468                 iref = (struct btrfs_extent_inline_ref *)ptr;
 469                 type = btrfs_extent_inline_ref_type(eb, iref);
 470                 offset = btrfs_extent_inline_ref_offset(eb, iref);
 471                 switch (type) {
 472                 case BTRFS_TREE_BLOCK_REF_KEY:
 473                         printf("\t\ttree block backref root %llu\n",
 474                                (unsigned long long)offset);
 475                         break;
 476                 case BTRFS_SHARED_BLOCK_REF_KEY:
 477                         printf("\t\tshared block backref parent %llu\n",
 478                                (unsigned long long)offset);
 479                         break;
 480                 case BTRFS_EXTENT_DATA_REF_KEY:
 481                         dref = (struct btrfs_extent_data_ref *)(&iref->offset);
 482                         printf("\t\textent data backref root %llu "
 483                                "objectid %llu offset %llu count %u\n",
 484                                (unsigned long long)btrfs_extent_data_ref_root(eb, dref),
 485                                (unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
 486                                (unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
 487                                btrfs_extent_data_ref_count(eb, dref));
 488                         break;
 489                 case BTRFS_SHARED_DATA_REF_KEY:
 490                         sref = (struct btrfs_shared_data_ref *)(iref + 1);
 491                         printf("\t\tshared data backref parent %llu count %u\n",
 492                                (unsigned long long)offset,
 493                                btrfs_shared_data_ref_count(eb, sref));
 494                         break;
 495                 default:
 496                         return;
 497                 }
 498                 ptr += btrfs_extent_inline_ref_size(type);
 499         }
 500         WARN_ON(ptr > end);
 501 }
 502
 503 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 504 static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
 505 {
 506         struct btrfs_extent_ref_v0 *ref0;
 507
 508         ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
 509         printf("\t\textent back ref root %llu gen %llu "
 510                 "owner %llu num_refs %lu\n",
 511                 (unsigned long long)btrfs_ref_root_v0(eb, ref0),
 512                 (unsigned long long)btrfs_ref_generation_v0(eb, ref0),
 513                 (unsigned long long)btrfs_ref_objectid_v0(eb, ref0),
 514                 (unsigned long)btrfs_ref_count_v0(eb, ref0));
 515 }
 516 #endif
 517
 518 static void print_root_ref(struct extent_buffer *leaf, int slot, const char *tag)
 519 {
 520         struct btrfs_root_ref *ref;
 521         char namebuf[BTRFS_NAME_LEN];
 522         int namelen;
 523
 524         ref = btrfs_item_ptr(leaf, slot, struct btrfs_root_ref);
 525         namelen = btrfs_root_ref_name_len(leaf, ref);
 526         read_extent_buffer(leaf, namebuf, (unsigned long)(ref + 1), namelen);
 527         printf("\t\troot %s key dirid %llu sequence %llu name %.*s\n", tag,
 528                (unsigned long long)btrfs_root_ref_dirid(leaf, ref),
 529                (unsigned long long)btrfs_root_ref_sequence(leaf, ref),
 530                namelen, namebuf);
 531 }
 532
 533 static int empty_uuid(const u8 *uuid)
 534 {
 535         int i;
 536
 537         for (i = 0; i < BTRFS_UUID_SIZE; i++)
 538                 if (uuid[i])
 539                         return 0;
 540         return 1;
 541 }
 542
 543 /*
 544  * Caller must ensure sizeof(*ret) >= 7 "RDONLY"
 545  */
 546 static void root_flags_to_str(u64 flags, char *ret)
 547 {
 548         if (flags & BTRFS_ROOT_SUBVOL_RDONLY)
 549                 strcat(ret, "RDONLY");
 550         else
 551                 strcat(ret, "none");
 552 }
 553
 554 static void print_root_item(struct extent_buffer *leaf, int slot)
 555 {
 556         struct btrfs_root_item *ri;
 557         struct btrfs_root_item root_item;
 558         int len;
 559         char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
 560         char flags_str[32] = {0};
 561         struct btrfs_key drop_key;
 562
 563         ri = btrfs_item_ptr(leaf, slot, struct btrfs_root_item);
 564         len = btrfs_item_size_nr(leaf, slot);
 565
 566         memset(&root_item, 0, sizeof(root_item));
 567         read_extent_buffer(leaf, &root_item, (unsigned long)ri, len);
 568         root_flags_to_str(btrfs_root_flags(&root_item), flags_str);
 569
 570         printf("\t\tgeneration %llu root_dirid %llu bytenr %llu level %hhu refs %u\n",
 571                 (unsigned long long)btrfs_root_generation(&root_item),
 572                 (unsigned long long)btrfs_root_dirid(&root_item),
 573                 (unsigned long long)btrfs_root_bytenr(&root_item),
 574                 btrfs_root_level(&root_item),
 575                 btrfs_root_refs(&root_item));
 576         printf("\t\tlastsnap %llu byte_limit %llu bytes_used %llu flags 0x%llx(%s)\n",
 577                 (unsigned long long)btrfs_root_last_snapshot(&root_item),
 578                 (unsigned long long)btrfs_root_limit(&root_item),
 579                 (unsigned long long)btrfs_root_used(&root_item),
 580                 (unsigned long long)btrfs_root_flags(&root_item),
 581                 flags_str);
 582
 583         if (root_item.generation == root_item.generation_v2) {
 584                 uuid_unparse(root_item.uuid, uuid_str);
 585                 printf("\t\tuuid %s\n", uuid_str);
 586                 if (!empty_uuid(root_item.parent_uuid)) {
 587                         uuid_unparse(root_item.parent_uuid, uuid_str);
 588                         printf("\t\tparent_uuid %s\n", uuid_str);
 589                 }
 590                 if (!empty_uuid(root_item.received_uuid)) {
 591                         uuid_unparse(root_item.received_uuid, uuid_str);
 592                         printf("\t\treceived_uuid %s\n", uuid_str);
 593                 }
 594                 if (root_item.ctransid) {
 595                         printf("\t\tctransid %llu otransid %llu stransid %llu rtransid %llu\n",
 596                                 btrfs_root_ctransid(&root_item),
 597                                 btrfs_root_otransid(&root_item),
 598                                 btrfs_root_stransid(&root_item),
 599                                 btrfs_root_rtransid(&root_item));
 600                 }
 601         }
 602
 603         btrfs_disk_key_to_cpu(&drop_key, &root_item.drop_progress);
 604         printf("\t\tdrop ");
 605         btrfs_print_key(&root_item.drop_progress);
 606         printf(" level %hhu\n", root_item.drop_level);
 607 }
 608
 609 static void print_free_space_header(struct extent_buffer *leaf, int slot)
 610 {
 611         struct btrfs_free_space_header *header;
 612         struct btrfs_disk_key location;
 613
 614         header = btrfs_item_ptr(leaf, slot, struct btrfs_free_space_header);
 615         btrfs_free_space_key(leaf, header, &location);
 616         printf("\t\tlocation ");
 617         btrfs_print_key(&location);
 618         printf("\n");
 619         printf("\t\tcache generation %llu entries %llu bitmaps %llu\n",
 620                (unsigned long long)btrfs_free_space_generation(leaf, header),
 621                (unsigned long long)btrfs_free_space_entries(leaf, header),
 622                (unsigned long long)btrfs_free_space_bitmaps(leaf, header));
 623 }
 624
 625 void print_key_type(FILE *stream, u64 objectid, u8 type)
 626 {
 627         static const char* key_to_str[256] = {
 628                 [BTRFS_INODE_ITEM_KEY]          = "INODE_ITEM",
 629                 [BTRFS_INODE_REF_KEY]           = "INODE_REF",
 630                 [BTRFS_INODE_EXTREF_KEY]        = "INODE_EXTREF",
 631                 [BTRFS_DIR_ITEM_KEY]            = "DIR_ITEM",
 632                 [BTRFS_DIR_INDEX_KEY]           = "DIR_INDEX",
 633                 [BTRFS_DIR_LOG_ITEM_KEY]        = "DIR_LOG_ITEM",
 634                 [BTRFS_DIR_LOG_INDEX_KEY]       = "DIR_LOG_INDEX",
 635                 [BTRFS_XATTR_ITEM_KEY]          = "XATTR_ITEM",
 636                 [BTRFS_ORPHAN_ITEM_KEY]         = "ORPHAN_ITEM",
 637                 [BTRFS_ROOT_ITEM_KEY]           = "ROOT_ITEM",
 638                 [BTRFS_ROOT_REF_KEY]            = "ROOT_REF",
 639                 [BTRFS_ROOT_BACKREF_KEY]        = "ROOT_BACKREF",
 640                 [BTRFS_EXTENT_ITEM_KEY]         = "EXTENT_ITEM",
 641                 [BTRFS_METADATA_ITEM_KEY]       = "METADATA_ITEM",
 642                 [BTRFS_TREE_BLOCK_REF_KEY]      = "TREE_BLOCK_REF",
 643                 [BTRFS_SHARED_BLOCK_REF_KEY]    = "SHARED_BLOCK_REF",
 644                 [BTRFS_EXTENT_DATA_REF_KEY]     = "EXTENT_DATA_REF",
 645                 [BTRFS_SHARED_DATA_REF_KEY]     = "SHARED_DATA_REF",
 646                 [BTRFS_EXTENT_REF_V0_KEY]       = "EXTENT_REF_V0",
 647                 [BTRFS_CSUM_ITEM_KEY]           = "CSUM_ITEM",
 648                 [BTRFS_EXTENT_CSUM_KEY]         = "EXTENT_CSUM",
 649                 [BTRFS_EXTENT_DATA_KEY]         = "EXTENT_DATA",
 650                 [BTRFS_BLOCK_GROUP_ITEM_KEY]    = "BLOCK_GROUP_ITEM",
 651                 [BTRFS_FREE_SPACE_INFO_KEY]     = "FREE_SPACE_INFO",
 652                 [BTRFS_FREE_SPACE_EXTENT_KEY]   = "FREE_SPACE_EXTENT",
 653                 [BTRFS_FREE_SPACE_BITMAP_KEY]   = "FREE_SPACE_BITMAP",
 654                 [BTRFS_CHUNK_ITEM_KEY]          = "CHUNK_ITEM",
 655                 [BTRFS_DEV_ITEM_KEY]            = "DEV_ITEM",
 656                 [BTRFS_DEV_EXTENT_KEY]          = "DEV_EXTENT",
 657                 [BTRFS_TEMPORARY_ITEM_KEY]      = "TEMPORARY_ITEM",
 658                 [BTRFS_DEV_REPLACE_KEY]         = "DEV_REPLACE",
 659                 [BTRFS_STRING_ITEM_KEY]         = "STRING_ITEM",
 660                 [BTRFS_QGROUP_STATUS_KEY]       = "QGROUP_STATUS",
 661                 [BTRFS_QGROUP_RELATION_KEY]     = "QGROUP_RELATION",
 662                 [BTRFS_QGROUP_INFO_KEY]         = "QGROUP_INFO",
 663                 [BTRFS_QGROUP_LIMIT_KEY]        = "QGROUP_LIMIT",
 664                 [BTRFS_PERSISTENT_ITEM_KEY]     = "PERSISTENT_ITEM",
 665                 [BTRFS_UUID_KEY_SUBVOL]         = "UUID_KEY_SUBVOL",
 666                 [BTRFS_UUID_KEY_RECEIVED_SUBVOL] = "UUID_KEY_RECEIVED_SUBVOL",
 667         };
 668
 669         if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID) {
 670                 fprintf(stream, "UNTYPED");
 671                 return;
 672         }
 673
 674
 675         if (key_to_str[type])
 676                 fputs(key_to_str[type], stream);
 677         else
 678                 fprintf(stream, "UNKNOWN.%d", type);
 679 }
 680
 681 void print_objectid(FILE *stream, u64 objectid, u8 type)
 682 {
 683         switch (type) {
 684         case BTRFS_DEV_EXTENT_KEY:
 685                 /* device id */
 686                 fprintf(stream, "%llu", (unsigned long long)objectid);
 687                 return;
 688         case BTRFS_QGROUP_RELATION_KEY:
 689                 fprintf(stream, "%llu/%llu", btrfs_qgroup_level(objectid),
 690                        btrfs_qgroup_subvid(objectid));
 691                 return;
 692         case BTRFS_UUID_KEY_SUBVOL:
 693         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 694                 fprintf(stream, "0x%016llx", (unsigned long long)objectid);
 695                 return;
 696         }
 697
 698         switch (objectid) {
 699         case BTRFS_ROOT_TREE_OBJECTID:
 700                 if (type == BTRFS_DEV_ITEM_KEY)
 701                         fprintf(stream, "DEV_ITEMS");
 702                 else
 703                         fprintf(stream, "ROOT_TREE");
 704                 break;
 705         case BTRFS_EXTENT_TREE_OBJECTID:
 706                 fprintf(stream, "EXTENT_TREE");
 707                 break;
 708         case BTRFS_CHUNK_TREE_OBJECTID:
 709                 fprintf(stream, "CHUNK_TREE");
 710                 break;
 711         case BTRFS_DEV_TREE_OBJECTID:
 712                 fprintf(stream, "DEV_TREE");
 713                 break;
 714         case BTRFS_FS_TREE_OBJECTID:
 715                 fprintf(stream, "FS_TREE");
 716                 break;
 717         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 718                 fprintf(stream, "ROOT_TREE_DIR");
 719                 break;
 720         case BTRFS_CSUM_TREE_OBJECTID:
 721                 fprintf(stream, "CSUM_TREE");
 722                 break;
 723         case BTRFS_BALANCE_OBJECTID:
 724                 fprintf(stream, "BALANCE");
 725                 break;
 726         case BTRFS_ORPHAN_OBJECTID:
 727                 fprintf(stream, "ORPHAN");
 728                 break;
 729         case BTRFS_TREE_LOG_OBJECTID:
 730                 fprintf(stream, "TREE_LOG");
 731                 break;
 732         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 733                 fprintf(stream, "LOG_FIXUP");
 734                 break;
 735         case BTRFS_TREE_RELOC_OBJECTID:
 736                 fprintf(stream, "TREE_RELOC");
 737                 break;
 738         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 739                 fprintf(stream, "DATA_RELOC_TREE");
 740                 break;
 741         case BTRFS_EXTENT_CSUM_OBJECTID:
 742                 fprintf(stream, "EXTENT_CSUM");
 743                 break;
 744         case BTRFS_FREE_SPACE_OBJECTID:
 745                 fprintf(stream, "FREE_SPACE");
 746                 break;
 747         case BTRFS_FREE_INO_OBJECTID:
 748                 fprintf(stream, "FREE_INO");
 749                 break;
 750         case BTRFS_QUOTA_TREE_OBJECTID:
 751                 fprintf(stream, "QUOTA_TREE");
 752                 break;
 753         case BTRFS_UUID_TREE_OBJECTID:
 754                 fprintf(stream, "UUID_TREE");
 755                 break;
 756         case BTRFS_FREE_SPACE_TREE_OBJECTID:
 757                 fprintf(stream, "FREE_SPACE_TREE");
 758                 break;
 759         case BTRFS_MULTIPLE_OBJECTIDS:
 760                 fprintf(stream, "MULTIPLE");
 761                 break;
 762         case (u64)-1:
 763                 fprintf(stream, "-1");
 764                 break;
 765         case BTRFS_FIRST_CHUNK_TREE_OBJECTID:
 766                 if (type == BTRFS_CHUNK_ITEM_KEY) {
 767                         fprintf(stream, "FIRST_CHUNK_TREE");
 768                         break;
 769                 }
 770                 /* fall-thru */
 771         default:
 772                 fprintf(stream, "%llu", (unsigned long long)objectid);
 773         }
 774 }
 775
 776 void btrfs_print_key(struct btrfs_disk_key *disk_key)
 777 {
 778         u64 objectid = btrfs_disk_key_objectid(disk_key);
 779         u8 type = btrfs_disk_key_type(disk_key);
 780         u64 offset = btrfs_disk_key_offset(disk_key);
 781
 782         printf("key (");
 783         print_objectid(stdout, objectid, type);
 784         printf(" ");
 785         print_key_type(stdout, objectid, type);
 786         switch (type) {
 787         case BTRFS_QGROUP_RELATION_KEY:
 788         case BTRFS_QGROUP_INFO_KEY:
 789         case BTRFS_QGROUP_LIMIT_KEY:
 790                 printf(" %llu/%llu)", btrfs_qgroup_level(offset),
 791                        btrfs_qgroup_subvid(offset));
 792                 break;
 793         case BTRFS_UUID_KEY_SUBVOL:
 794         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 795                 printf(" 0x%016llx)", (unsigned long long)offset);
 796                 break;
 797
 798         /*
 799          * Key offsets of ROOT_ITEM point to tree root, print them in human
 800          * readable format.  Especially useful for trees like data/tree reloc
 801          * tree, whose tree id can be negative.
 802          */
 803         case BTRFS_ROOT_ITEM_KEY:
 804                 printf(" ");
 805                 print_objectid(stdout, offset, type);
 806                 printf(")");
 807                 break;
 808         default:
 809                 if (offset == (u64)-1)
 810                         printf(" -1)");
 811                 else
 812                         printf(" %llu)", (unsigned long long)offset);
 813                 break;
 814         }
 815 }
 816
 817 static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
 818                             u32 item_size)
 819 {
 820         if (item_size & (sizeof(u64) - 1)) {
 821                 printf("btrfs: uuid item with illegal size %lu!\n",
 822                        (unsigned long)item_size);
 823                 return;
 824         }
 825         while (item_size) {
 826                 __le64 subvol_id;
 827
 828                 read_extent_buffer(l, &subvol_id, offset, sizeof(u64));
 829                 printf("\t\tsubvol_id %llu\n",
 830                         (unsigned long long)le64_to_cpu(subvol_id));
 831                 item_size -= sizeof(u64);
 832                 offset += sizeof(u64);
 833         }
 834 }
 835
 836 /* Btrfs inode flag stringification helper */
 837 #define STRCAT_ONE_INODE_FLAG(flags, name, empty, dst) ({                       \
 838         if (flags & BTRFS_INODE_##name) {                               \
 839                 if (!empty)                                             \
 840                         strcat(dst, "|");                               \
 841                 strcat(dst, #name);                                     \
 842                 empty = 0;                                              \
 843         }                                                               \
 844 })
 845
 846 /*
 847  * Caller should ensure sizeof(*ret) >= 102: all charactors plus '|' of
 848  * BTRFS_INODE_* flags
 849  */
 850 static void inode_flags_to_str(u64 flags, char *ret)
 851 {
 852         int empty = 1;
 853
 854         STRCAT_ONE_INODE_FLAG(flags, NODATASUM, empty, ret);
 855         STRCAT_ONE_INODE_FLAG(flags, NODATACOW, empty, ret);
 856         STRCAT_ONE_INODE_FLAG(flags, READONLY, empty, ret);
 857         STRCAT_ONE_INODE_FLAG(flags, NOCOMPRESS, empty, ret);
 858         STRCAT_ONE_INODE_FLAG(flags, PREALLOC, empty, ret);
 859         STRCAT_ONE_INODE_FLAG(flags, SYNC, empty, ret);
 860         STRCAT_ONE_INODE_FLAG(flags, IMMUTABLE, empty, ret);
 861         STRCAT_ONE_INODE_FLAG(flags, APPEND, empty, ret);
 862         STRCAT_ONE_INODE_FLAG(flags, NODUMP, empty, ret);
 863         STRCAT_ONE_INODE_FLAG(flags, NOATIME, empty, ret);
 864         STRCAT_ONE_INODE_FLAG(flags, DIRSYNC, empty, ret);
 865         STRCAT_ONE_INODE_FLAG(flags, COMPRESS, empty, ret);
 866         if (empty)
 867                 strcat(ret, "none");
 868 }
 869
 870 static void print_timespec(struct extent_buffer *eb,
 871                 struct btrfs_timespec *timespec, const char *prefix,
 872                 const char *suffix)
 873 {
 874         struct tm tm;
 875         u64 tmp_u64;
 876         u32 tmp_u32;
 877         time_t tmp_time;
 878         char timestamp[256];
 879
 880         tmp_u64 = btrfs_timespec_sec(eb, timespec);
 881         tmp_u32 = btrfs_timespec_nsec(eb, timespec);
 882         tmp_time = tmp_u64;
 883         localtime_r(&tmp_time, &tm);
 884         strftime(timestamp, sizeof(timestamp),
 885                         "%Y-%m-%d %H:%M:%S", &tm);
 886         printf("%s%llu.%u (%s)%s", prefix, (unsigned long long)tmp_u64, tmp_u32,
 887                         timestamp, suffix);
 888 }
 889
 890 static void print_inode_item(struct extent_buffer *eb,
 891                 struct btrfs_inode_item *ii)
 892 {
 893         char flags_str[256];
 894
 895         memset(flags_str, 0, sizeof(flags_str));
 896         inode_flags_to_str(btrfs_inode_flags(eb, ii), flags_str);
 897         printf("\t\tgeneration %llu transid %llu size %llu nbytes %llu\n"
 898                "\t\tblock group %llu mode %o links %u uid %u gid %u rdev %llu\n"
 899                "\t\tsequence %llu flags 0x%llx(%s)\n",
 900                (unsigned long long)btrfs_inode_generation(eb, ii),
 901                (unsigned long long)btrfs_inode_transid(eb, ii),
 902                (unsigned long long)btrfs_inode_size(eb, ii),
 903                (unsigned long long)btrfs_inode_nbytes(eb, ii),
 904                (unsigned long long)btrfs_inode_block_group(eb,ii),
 905                btrfs_inode_mode(eb, ii),
 906                btrfs_inode_nlink(eb, ii),
 907                btrfs_inode_uid(eb, ii),
 908                btrfs_inode_gid(eb, ii),
 909                (unsigned long long)btrfs_inode_rdev(eb,ii),
 910                (unsigned long long)btrfs_inode_flags(eb,ii),
 911                (unsigned long long)btrfs_inode_sequence(eb, ii),
 912                flags_str);
 913         print_timespec(eb, btrfs_inode_atime(ii), "\t\tatime ", "\n");
 914         print_timespec(eb, btrfs_inode_ctime(ii), "\t\tctime ", "\n");
 915         print_timespec(eb, btrfs_inode_mtime(ii), "\t\tmtime ", "\n");
 916         print_timespec(eb, btrfs_inode_otime(ii), "\t\totime ", "\n");
 917 }
 918
 919 static void print_disk_balance_args(struct btrfs_disk_balance_args *ba)
 920 {
 921         printf("\t\tprofiles %llu devid %llu target %llu flags %llu\n",
 922                         (unsigned long long)le64_to_cpu(ba->profiles),
 923                         (unsigned long long)le64_to_cpu(ba->devid),
 924                         (unsigned long long)le64_to_cpu(ba->target),
 925                         (unsigned long long)le64_to_cpu(ba->flags));
 926         printf("\t\tusage_min %u usage_max %u pstart %llu pend %llu\n",
 927                         le32_to_cpu(ba->usage_min),
 928                         le32_to_cpu(ba->usage_max),
 929                         (unsigned long long)le64_to_cpu(ba->pstart),
 930                         (unsigned long long)le64_to_cpu(ba->pend));
 931         printf("\t\tvstart %llu vend %llu limit_min %u limit_max %u\n",
 932                         (unsigned long long)le64_to_cpu(ba->vstart),
 933                         (unsigned long long)le64_to_cpu(ba->vend),
 934                         le32_to_cpu(ba->limit_min),
 935                         le32_to_cpu(ba->limit_max));
 936         printf("\t\tstripes_min %u stripes_max %u\n",
 937                         le32_to_cpu(ba->stripes_min),
 938                         le32_to_cpu(ba->stripes_max));
 939 }
 940
 941 static void print_balance_item(struct extent_buffer *eb,
 942                 struct btrfs_balance_item *bi)
 943 {
 944         printf("\t\tbalance status flags %llu\n",
 945                         btrfs_balance_item_flags(eb, bi));
 946
 947         printf("\t\tDATA\n");
 948         print_disk_balance_args(btrfs_balance_item_data(eb, bi));
 949         printf("\t\tMETADATA\n");
 950         print_disk_balance_args(btrfs_balance_item_meta(eb, bi));
 951         printf("\t\tSYSTEM\n");
 952         print_disk_balance_args(btrfs_balance_item_sys(eb, bi));
 953 }
 954
 955 static void print_dev_stats(struct extent_buffer *eb,
 956                 struct btrfs_dev_stats_item *stats, u32 size)
 957 {
 958         int i;
 959         u32 known = BTRFS_DEV_STAT_VALUES_MAX * sizeof(__le64);
 960         __le64 *values = btrfs_dev_stats_values(eb, stats);
 961
 962         printf("\t\tdevice stats\n");
 963         printf("\t\twrite_errs %llu read_errs %llu flush_errs %llu corruption_errs %llu generation %llu\n",
 964                 (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_WRITE_ERRS]),
 965                 (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_READ_ERRS]),
 966                 (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_FLUSH_ERRS]),
 967                 (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_CORRUPTION_ERRS]),
 968                 (unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_GENERATION_ERRS]));
 969
 970         if (known < size) {
 971                 printf("\t\tunknown stats item bytes %u", size - known);
 972                 for (i = BTRFS_DEV_STAT_VALUES_MAX; i * sizeof(__le64) < size; i++) {
 973                         printf("\t\tunknown item %u offset %zu value %llu\n",
 974                                 i, i * sizeof(__le64),
 975                                 (unsigned long long)le64_to_cpu(values[i]));
 976                 }
 977         }
 978 }
 979
 980 static void print_block_group_item(struct extent_buffer *eb,
 981                 struct btrfs_block_group_item *bgi)
 982 {
 983         struct btrfs_block_group_item bg_item;
 984         char flags_str[256];
 985
 986         read_extent_buffer(eb, &bg_item, (unsigned long)bgi, sizeof(bg_item));
 987         memset(flags_str, 0, sizeof(flags_str));
 988         bg_flags_to_str(btrfs_block_group_flags(&bg_item), flags_str);
 989         printf("\t\tblock group used %llu chunk_objectid %llu flags %s\n",
 990                 (unsigned long long)btrfs_block_group_used(&bg_item),
 991                 (unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
 992                 flags_str);
 993 }
 994
 995 static void print_extent_data_ref(struct extent_buffer *eb, int slot)
 996 {
 997         struct btrfs_extent_data_ref *dref;
 998
 999         dref = btrfs_item_ptr(eb, slot, struct btrfs_extent_data_ref);
1000         printf("\t\textent data backref root %llu "
1001                 "objectid %llu offset %llu count %u\n",
1002                 (unsigned long long)btrfs_extent_data_ref_root(eb, dref),
1003                 (unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
1004                 (unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
1005                 btrfs_extent_data_ref_count(eb, dref));
1006 }
1007
1008 static void print_shared_data_ref(struct extent_buffer *eb, int slot)
1009 {
1010         struct btrfs_shared_data_ref *sref;
1011
1012         sref = btrfs_item_ptr(eb, slot, struct btrfs_shared_data_ref);
1013         printf("\t\tshared data backref count %u\n",
1014                 btrfs_shared_data_ref_count(eb, sref));
1015 }
1016
1017 static void print_free_space_info(struct extent_buffer *eb, int slot)
1018 {
1019         struct btrfs_free_space_info *free_info;
1020
1021         free_info = btrfs_item_ptr(eb, slot, struct btrfs_free_space_info);
1022         printf("\t\tfree space info extent count %u flags %u\n",
1023                 (unsigned)btrfs_free_space_extent_count(eb, free_info),
1024                 (unsigned)btrfs_free_space_flags(eb, free_info));
1025 }
1026
1027 static void print_dev_extent(struct extent_buffer *eb, int slot)
1028 {
1029         struct btrfs_dev_extent *dev_extent;
1030         u8 uuid[BTRFS_UUID_SIZE];
1031         char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
1032
1033         dev_extent = btrfs_item_ptr(eb, slot, struct btrfs_dev_extent);
1034         read_extent_buffer(eb, uuid,
1035                 (unsigned long)btrfs_dev_extent_chunk_tree_uuid(dev_extent),
1036                 BTRFS_UUID_SIZE);
1037         uuid_unparse(uuid, uuid_str);
1038         printf("\t\tdev extent chunk_tree %llu\n"
1039                 "\t\tchunk_objectid %llu chunk_offset %llu "
1040                 "length %llu\n"
1041                 "\t\tchunk_tree_uuid %s\n",
1042                 (unsigned long long)btrfs_dev_extent_chunk_tree(eb, dev_extent),
1043                 (unsigned long long)btrfs_dev_extent_chunk_objectid(eb, dev_extent),
1044                 (unsigned long long)btrfs_dev_extent_chunk_offset(eb, dev_extent),
1045                 (unsigned long long)btrfs_dev_extent_length(eb, dev_extent),
1046                 uuid_str);
1047 }
1048
1049 static void print_qgroup_status(struct extent_buffer *eb, int slot)
1050 {
1051         struct btrfs_qgroup_status_item *qg_status;
1052         char flags_str[256];
1053
1054         qg_status = btrfs_item_ptr(eb, slot, struct btrfs_qgroup_status_item);
1055         memset(flags_str, 0, sizeof(flags_str));
1056         qgroup_flags_to_str(btrfs_qgroup_status_flags(eb, qg_status),
1057                                         flags_str);
1058         printf("\t\tversion %llu generation %llu flags %s scan %lld\n",
1059                 (unsigned long long)btrfs_qgroup_status_version(eb, qg_status),
1060                 (unsigned long long)btrfs_qgroup_status_generation(eb, qg_status),
1061                 flags_str,
1062                 (unsigned long long)btrfs_qgroup_status_rescan(eb, qg_status));
1063 }
1064
1065 static void print_qgroup_info(struct extent_buffer *eb, int slot)
1066 {
1067         struct btrfs_qgroup_info_item *qg_info;
1068
1069         qg_info = btrfs_item_ptr(eb, slot, struct btrfs_qgroup_info_item);
1070         printf("\t\tgeneration %llu\n"
1071                 "\t\treferenced %llu referenced_compressed %llu\n"
1072                 "\t\texclusive %llu exclusive_compressed %llu\n",
1073                 (unsigned long long)btrfs_qgroup_info_generation(eb, qg_info),
1074                 (unsigned long long)btrfs_qgroup_info_referenced(eb, qg_info),
1075                 (unsigned long long)btrfs_qgroup_info_referenced_compressed(eb,
1076                                                                        qg_info),
1077                 (unsigned long long)btrfs_qgroup_info_exclusive(eb, qg_info),
1078                 (unsigned long long)btrfs_qgroup_info_exclusive_compressed(eb,
1079                                                                       qg_info));
1080 }
1081
1082 static void print_qgroup_limit(struct extent_buffer *eb, int slot)
1083 {
1084         struct btrfs_qgroup_limit_item *qg_limit;
1085
1086         qg_limit = btrfs_item_ptr(eb, slot, struct btrfs_qgroup_limit_item);
1087         printf("\t\tflags %llx\n"
1088                 "\t\tmax_referenced %lld max_exclusive %lld\n"
1089                 "\t\trsv_referenced %lld rsv_exclusive %lld\n",
1090                 (unsigned long long)btrfs_qgroup_limit_flags(eb, qg_limit),
1091                 (long long)btrfs_qgroup_limit_max_referenced(eb, qg_limit),
1092                 (long long)btrfs_qgroup_limit_max_exclusive(eb, qg_limit),
1093                 (long long)btrfs_qgroup_limit_rsv_referenced(eb, qg_limit),
1094                 (long long)btrfs_qgroup_limit_rsv_exclusive(eb, qg_limit));
1095 }
1096
1097 static void print_persistent_item(struct extent_buffer *eb, void *ptr,
1098                 u32 item_size, u64 objectid, u64 offset)
1099 {
1100         printf("\t\tpersistent item objectid ");
1101         print_objectid(stdout, objectid, BTRFS_PERSISTENT_ITEM_KEY);
1102         printf(" offset %llu\n", (unsigned long long)offset);
1103         switch (objectid) {
1104         case BTRFS_DEV_STATS_OBJECTID:
1105                 print_dev_stats(eb, ptr, item_size);
1106                 break;
1107         default:
1108                 printf("\t\tunknown persistent item objectid %llu\n", objectid);
1109         }
1110 }
1111
1112 static void print_temporary_item(struct extent_buffer *eb, void *ptr,
1113                 u64 objectid, u64 offset)
1114 {
1115         printf("\t\ttemporary item objectid ");
1116         print_objectid(stdout, objectid, BTRFS_TEMPORARY_ITEM_KEY);
1117         printf(" offset %llu\n", (unsigned long long)offset);
1118         switch (objectid) {
1119         case BTRFS_BALANCE_OBJECTID:
1120                 print_balance_item(eb, ptr);
1121                 break;
1122         default:
1123                 printf("\t\tunknown temporary item objectid %llu\n", objectid);
1124         }
1125 }
1126
1127 static void print_extent_csum(struct extent_buffer *eb,
1128                 struct btrfs_fs_info *fs_info, u32 item_size, u64 start)
1129 {
1130         u32 size;
1131
1132         size = (item_size / btrfs_super_csum_size(fs_info->super_copy)) *
1133                         fs_info->sectorsize;
1134         printf("\t\trange start %llu end %llu length %u\n",
1135                         (unsigned long long)start,
1136                         (unsigned long long)start + size, size);
1137 }
1138
1139 /* Caller must ensure sizeof(*ret) >= 14 "WRITTEN|RELOC" */
1140 static void header_flags_to_str(u64 flags, char *ret)
1141 {
1142         int empty = 1;
1143
1144         if (flags & BTRFS_HEADER_FLAG_WRITTEN) {
1145                 empty = 0;
1146                 strcpy(ret, "WRITTEN");
1147         }
1148         if (flags & BTRFS_HEADER_FLAG_RELOC) {
1149                 if (!empty)
1150                         strcat(ret, "|");
1151                 strcat(ret, "RELOC");
1152         }
1153 }
1154
1155 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *eb)
1156 {
1157         struct btrfs_item *item;
1158         struct btrfs_disk_key disk_key;
1159         char flags_str[128];
1160         u32 i;
1161         u32 nr;
1162         u64 flags;
1163         u8 backref_rev;
1164
1165         flags = btrfs_header_flags(eb) & ~BTRFS_BACKREF_REV_MASK;
1166         backref_rev = btrfs_header_flags(eb) >> BTRFS_BACKREF_REV_SHIFT;
1167         header_flags_to_str(flags, flags_str);
1168         nr = btrfs_header_nritems(eb);
1169
1170         printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
1171                 (unsigned long long)btrfs_header_bytenr(eb), nr,
1172                 btrfs_leaf_free_space(root, eb),
1173                 (unsigned long long)btrfs_header_generation(eb),
1174                 (unsigned long long)btrfs_header_owner(eb));
1175         printf("leaf %llu flags 0x%llx(%s) backref revision %d\n",
1176                 btrfs_header_bytenr(eb), flags, flags_str, backref_rev);
1177         print_uuids(eb);
1178         fflush(stdout);
1179
1180         for (i = 0; i < nr; i++) {
1181                 u32 item_size;
1182                 void *ptr;
1183                 u64 objectid;
1184                 u32 type;
1185                 u64 offset;
1186
1187                 item = btrfs_item_nr(i);
1188                 item_size = btrfs_item_size(eb, item);
1189                 /* Untyped extraction of slot from btrfs_item_ptr */
1190                 ptr = btrfs_item_ptr(eb, i, void*);
1191
1192                 btrfs_item_key(eb, &disk_key, i);
1193                 objectid = btrfs_disk_key_objectid(&disk_key);
1194                 type = btrfs_disk_key_type(&disk_key);
1195                 offset = btrfs_disk_key_offset(&disk_key);
1196
1197                 printf("\titem %d ", i);
1198                 btrfs_print_key(&disk_key);
1199                 printf(" itemoff %d itemsize %d\n",
1200                         btrfs_item_offset(eb, item),
1201                         btrfs_item_size(eb, item));
1202
1203                 if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID)
1204                         print_free_space_header(eb, i);
1205
1206                 switch (type) {
1207                 case BTRFS_INODE_ITEM_KEY:
1208                         print_inode_item(eb, ptr);
1209                         break;
1210                 case BTRFS_INODE_REF_KEY:
1211                         print_inode_ref_item(eb, item_size, ptr);
1212                         break;
1213                 case BTRFS_INODE_EXTREF_KEY:
1214                         print_inode_extref_item(eb, item_size, ptr);
1215                         break;
1216                 case BTRFS_DIR_ITEM_KEY:
1217                 case BTRFS_DIR_INDEX_KEY:
1218                 case BTRFS_XATTR_ITEM_KEY:
1219                         print_dir_item(eb, item_size, ptr);
1220                         break;
1221                 case BTRFS_DIR_LOG_INDEX_KEY:
1222                 case BTRFS_DIR_LOG_ITEM_KEY: {
1223                         struct btrfs_dir_log_item *dlog;
1224
1225                         dlog = btrfs_item_ptr(eb, i, struct btrfs_dir_log_item);
1226                         printf("\t\tdir log end %Lu\n",
1227                                (unsigned long long)btrfs_dir_log_end(eb, dlog));
1228                         break;
1229                         }
1230                 case BTRFS_ORPHAN_ITEM_KEY:
1231                         printf("\t\torphan item\n");
1232                         break;
1233                 case BTRFS_ROOT_ITEM_KEY:
1234                         print_root_item(eb, i);
1235                         break;
1236                 case BTRFS_ROOT_REF_KEY:
1237                         print_root_ref(eb, i, "ref");
1238                         break;
1239                 case BTRFS_ROOT_BACKREF_KEY:
1240                         print_root_ref(eb, i, "backref");
1241                         break;
1242                 case BTRFS_EXTENT_ITEM_KEY:
1243                         print_extent_item(eb, i, 0);
1244                         break;
1245                 case BTRFS_METADATA_ITEM_KEY:
1246                         print_extent_item(eb, i, 1);
1247                         break;
1248                 case BTRFS_TREE_BLOCK_REF_KEY:
1249                         printf("\t\ttree block backref\n");
1250                         break;
1251                 case BTRFS_SHARED_BLOCK_REF_KEY:
1252                         printf("\t\tshared block backref\n");
1253                         break;
1254                 case BTRFS_EXTENT_DATA_REF_KEY:
1255                         print_extent_data_ref(eb, i);
1256                         break;
1257                 case BTRFS_SHARED_DATA_REF_KEY:
1258                         print_shared_data_ref(eb, i);
1259                         break;
1260                 case BTRFS_EXTENT_REF_V0_KEY:
1261 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
1262                         print_extent_ref_v0(eb, i);
1263 #else
1264                         BUG();
1265 #endif
1266                         break;
1267                 case BTRFS_CSUM_ITEM_KEY:
1268                         printf("\t\tcsum item\n");
1269                         break;
1270                 case BTRFS_EXTENT_CSUM_KEY:
1271                         print_extent_csum(eb, root->fs_info, item_size,
1272                                         offset);
1273                         break;
1274                 case BTRFS_EXTENT_DATA_KEY:
1275                         print_file_extent_item(eb, item, i, ptr);
1276                         break;
1277                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
1278                         print_block_group_item(eb, ptr);
1279                         break;
1280                 case BTRFS_FREE_SPACE_INFO_KEY:
1281                         print_free_space_info(eb, i);
1282                         break;
1283                 case BTRFS_FREE_SPACE_EXTENT_KEY:
1284                         printf("\t\tfree space extent\n");
1285                         break;
1286                 case BTRFS_FREE_SPACE_BITMAP_KEY:
1287                         printf("\t\tfree space bitmap\n");
1288                         break;
1289                 case BTRFS_CHUNK_ITEM_KEY:
1290                         print_chunk_item(eb, ptr);
1291                         break;
1292                 case BTRFS_DEV_ITEM_KEY:
1293                         print_dev_item(eb, ptr);
1294                         break;
1295                 case BTRFS_DEV_EXTENT_KEY:
1296                         print_dev_extent(eb, i);
1297                         break;
1298                 case BTRFS_QGROUP_STATUS_KEY:
1299                         print_qgroup_status(eb, i);
1300                         break;
1301                 case BTRFS_QGROUP_RELATION_KEY:
1302                         break;
1303                 case BTRFS_QGROUP_INFO_KEY:
1304                         print_qgroup_info(eb, i);
1305                         break;
1306                 case BTRFS_QGROUP_LIMIT_KEY:
1307                         print_qgroup_limit(eb, i);
1308                         break;
1309                 case BTRFS_UUID_KEY_SUBVOL:
1310                 case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
1311                         print_uuid_item(eb, btrfs_item_ptr_offset(eb, i),
1312                                         btrfs_item_size_nr(eb, i));
1313                         break;
1314                 case BTRFS_STRING_ITEM_KEY: {
1315                         const char *str = eb->data + btrfs_item_ptr_offset(eb, i);
1316
1317                         printf("\t\titem data %.*s\n", item_size, str);
1318                         break;
1319                         }
1320                 case BTRFS_PERSISTENT_ITEM_KEY:
1321                         print_persistent_item(eb, ptr, item_size, objectid,
1322                                         offset);
1323                         break;
1324                 case BTRFS_TEMPORARY_ITEM_KEY:
1325                         print_temporary_item(eb, ptr, objectid, offset);
1326                         break;
1327                 };
1328                 fflush(stdout);
1329         }
1330 }
1331
1332 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb, int follow)
1333 {
1334         u32 i;
1335         u32 nr;
1336         struct btrfs_disk_key disk_key;
1337         struct btrfs_key key;
1338         struct extent_buffer *next;
1339
1340         if (!eb)
1341                 return;
1342         nr = btrfs_header_nritems(eb);
1343         if (btrfs_is_leaf(eb)) {
1344                 btrfs_print_leaf(root, eb);
1345                 return;
1346         }
1347         printf("node %llu level %d items %d free %u generation %llu owner %llu\n",
1348                (unsigned long long)eb->start,
1349                 btrfs_header_level(eb), nr,
1350                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
1351                 (unsigned long long)btrfs_header_generation(eb),
1352                 (unsigned long long)btrfs_header_owner(eb));
1353         print_uuids(eb);
1354         fflush(stdout);
1355         for (i = 0; i < nr; i++) {
1356                 u64 blocknr = btrfs_node_blockptr(eb, i);
1357                 btrfs_node_key(eb, &disk_key, i);
1358                 btrfs_disk_key_to_cpu(&key, &disk_key);
1359                 printf("\t");
1360                 btrfs_print_key(&disk_key);
1361                 printf(" block %llu (%llu) gen %llu\n",
1362                        (unsigned long long)blocknr,
1363                        (unsigned long long)blocknr / root->fs_info->nodesize,
1364                        (unsigned long long)btrfs_node_ptr_generation(eb, i));
1365                 fflush(stdout);
1366         }
1367         if (!follow)
1368                 return;
1369
1370         for (i = 0; i < nr; i++) {
1371                 next = read_tree_block(root->fs_info,
1372                                 btrfs_node_blockptr(eb, i),
1373                                 btrfs_node_ptr_generation(eb, i));
1374                 if (!extent_buffer_uptodate(next)) {
1375                         fprintf(stderr, "failed to read %llu in tree %llu\n",
1376                                 (unsigned long long)btrfs_node_blockptr(eb, i),
1377                                 (unsigned long long)btrfs_header_owner(eb));
1378                         continue;
1379                 }
1380                 if (btrfs_is_leaf(next) && btrfs_header_level(eb) != 1) {
1381                         warning(
1382         "eb corrupted: item %d eb level %d next level %d, skipping the rest",
1383                                 i, btrfs_header_level(next),
1384                                 btrfs_header_level(eb));
1385                         goto out;
1386                 }
1387                 if (btrfs_header_level(next) != btrfs_header_level(eb) - 1) {
1388                         warning(
1389         "eb corrupted: item %d eb level %d next level %d, skipping the rest",
1390                                 i, btrfs_header_level(next),
1391                                 btrfs_header_level(eb));
1392                         goto out;
1393                 }
1394                 btrfs_print_tree(root, next, 1);
1395                 free_extent_buffer(next);
1396         }
1397
1398         return;
1399
1400 out:
1401         free_extent_buffer(next);
1402 }