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