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
  27 static int print_dir_item(struct extent_buffer *eb, struct btrfs_item *item,
  28                           struct btrfs_dir_item *di)
  29 {
  30         u32 total;
  31         u32 cur = 0;
  32         u32 len;
  33         u32 name_len;
  34         u32 data_len;
  35         char namebuf[BTRFS_NAME_LEN];
  36         struct btrfs_disk_key location;
  37
  38         total = btrfs_item_size(eb, item);
  39         while(cur < total) {
  40                 btrfs_dir_item_key(eb, di, &location);
  41                 printf("\t\tdir index %llu type %u\n",
  42                        (unsigned long long)btrfs_disk_key_objectid(&location),
  43                        btrfs_dir_type(eb, di));
  44                 name_len = btrfs_dir_name_len(eb, di);
  45                 data_len = btrfs_dir_data_len(eb, di);
  46                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
  47                 read_extent_buffer(eb, namebuf, (unsigned long)(di + 1), len);
  48                 printf("\t\tnamelen %u datalen %u name: %.*s\n",
  49                        name_len, data_len, len, namebuf);
  50                 len = sizeof(*di) + name_len + data_len;
  51                 di = (struct btrfs_dir_item *)((char *)di + len);
  52                 cur += len;
  53         }
  54         return 0;
  55 }
  56
  57 static int print_inode_ref_item(struct extent_buffer *eb, struct btrfs_item *item,
  58                                 struct btrfs_inode_ref *ref)
  59 {
  60         u32 total;
  61         u32 cur = 0;
  62         u32 len;
  63         u32 name_len;
  64         u64 index;
  65         char namebuf[BTRFS_NAME_LEN];
  66         total = btrfs_item_size(eb, item);
  67         while(cur < total) {
  68                 name_len = btrfs_inode_ref_name_len(eb, ref);
  69                 index = btrfs_inode_ref_index(eb, ref);
  70                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
  71                 read_extent_buffer(eb, namebuf, (unsigned long)(ref + 1), len);
  72                 printf("\t\tinode ref index %llu namelen %u name: %.*s\n",
  73                        index, name_len, len, namebuf);
  74                 len = sizeof(*ref) + name_len;
  75                 ref = (struct btrfs_inode_ref *)((char *)ref + len);
  76                 cur += len;
  77         }
  78         return 0;
  79 }
  80
  81 static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
  82 {
  83         int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
  84         int i;
  85         printf("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
  86                (unsigned long long)btrfs_chunk_length(eb, chunk),
  87                (unsigned long long)btrfs_chunk_owner(eb, chunk),
  88                (unsigned long long)btrfs_chunk_type(eb, chunk),
  89                num_stripes);
  90         for (i = 0 ; i < num_stripes ; i++) {
  91                 printf("\t\t\tstripe %d devid %llu offset %llu\n", i,
  92                       (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
  93                       (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
  94         }
  95 }
  96 static void print_dev_item(struct extent_buffer *eb,
  97                            struct btrfs_dev_item *dev_item)
  98 {
  99         printf("\t\tdev item devid %llu "
 100                "total_bytes %llu bytes used %Lu\n",
 101                (unsigned long long)btrfs_device_id(eb, dev_item),
 102                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
 103                (unsigned long long)btrfs_device_bytes_used(eb, dev_item));
 104 }
 105
 106 static void print_uuids(struct extent_buffer *eb)
 107 {
 108         char fs_uuid[37];
 109         char chunk_uuid[37];
 110         u8 disk_uuid[BTRFS_UUID_SIZE];
 111
 112         read_extent_buffer(eb, disk_uuid, (unsigned long)btrfs_header_fsid(eb),
 113                            BTRFS_FSID_SIZE);
 114
 115         fs_uuid[36] = '\0';
 116         uuid_unparse(disk_uuid, fs_uuid);
 117
 118         read_extent_buffer(eb, disk_uuid,
 119                            (unsigned long)btrfs_header_chunk_tree_uuid(eb),
 120                            BTRFS_UUID_SIZE);
 121
 122         chunk_uuid[36] = '\0';
 123         uuid_unparse(disk_uuid, chunk_uuid);
 124         printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
 125 }
 126
 127 static void print_file_extent_item(struct extent_buffer *eb,
 128                                    struct btrfs_item *item,
 129                                    struct btrfs_file_extent_item *fi)
 130 {
 131         int extent_type = btrfs_file_extent_type(eb, fi);
 132
 133         if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 134                 printf("\t\tinline extent data size %u "
 135                        "ram %u compress %d\n",
 136                   btrfs_file_extent_inline_item_len(eb, item),
 137                   btrfs_file_extent_inline_len(eb, fi),
 138                   btrfs_file_extent_compression(eb, fi));
 139                 return;
 140         }
 141         if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
 142                 printf("\t\tprealloc data disk byte %llu nr %llu\n",
 143                   (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 144                   (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 145                 printf("\t\tprealloc data offset %llu nr %llu\n",
 146                   (unsigned long long)btrfs_file_extent_offset(eb, fi),
 147                   (unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
 148                 return;
 149         }
 150         printf("\t\textent data disk byte %llu nr %llu\n",
 151                 (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 152                 (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 153         printf("\t\textent data offset %llu nr %llu ram %llu\n",
 154                 (unsigned long long)btrfs_file_extent_offset(eb, fi),
 155                 (unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
 156                 (unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
 157         printf("\t\textent compression %d\n",
 158                btrfs_file_extent_compression(eb, fi));
 159 }
 160
 161
 162 static void print_root_ref(struct extent_buffer *leaf, int slot, char *tag)
 163 {
 164         struct btrfs_root_ref *ref;
 165         char namebuf[BTRFS_NAME_LEN];
 166         int namelen;
 167
 168         ref = btrfs_item_ptr(leaf, slot, struct btrfs_root_ref);
 169         namelen = btrfs_root_ref_name_len(leaf, ref);
 170         read_extent_buffer(leaf, namebuf, (unsigned long)(ref + 1), namelen);
 171         printf("\t\troot %s key dirid %llu sequence %llu name %.*s\n", tag,
 172                (unsigned long long)btrfs_root_ref_dirid(leaf, ref),
 173                (unsigned long long)btrfs_root_ref_sequence(leaf, ref),
 174                namelen, namebuf);
 175 }
 176
 177 static void print_key_type(u8 type)
 178 {
 179         switch (type) {
 180         case BTRFS_INODE_ITEM_KEY:
 181                 printf("INODE_ITEM");
 182                 break;
 183         case BTRFS_INODE_REF_KEY:
 184                 printf("INODE_REF");
 185                 break;
 186         case BTRFS_DIR_ITEM_KEY:
 187                 printf("DIR_ITEM");
 188                 break;
 189         case BTRFS_DIR_INDEX_KEY:
 190                 printf("DIR_INDEX");
 191                 break;
 192         case BTRFS_XATTR_ITEM_KEY:
 193                 printf("XATTR_ITEM");
 194                 break;
 195         case BTRFS_ORPHAN_ITEM_KEY:
 196                 printf("ORPHAN_ITEM");
 197                 break;
 198         case BTRFS_ROOT_ITEM_KEY:
 199                 printf("ROOT_ITEM");
 200                 break;
 201         case BTRFS_ROOT_REF_KEY:
 202                 printf("ROOT_REF");
 203                 break;
 204         case BTRFS_ROOT_BACKREF_KEY:
 205                 printf("ROOT_BACKREF");
 206                 break;
 207         case BTRFS_EXTENT_ITEM_KEY:
 208                 printf("EXTENT_ITEM");
 209                 break;
 210         case BTRFS_EXTENT_REF_KEY:
 211                 printf("EXTENT_REF");
 212                 break;
 213         case BTRFS_CSUM_ITEM_KEY:
 214                 printf("CSUM_ITEM");
 215                 break;
 216         case BTRFS_EXTENT_CSUM_KEY:
 217                 printf("EXTENT_CSUM");
 218                 break;
 219         case BTRFS_EXTENT_DATA_KEY:
 220                 printf("EXTENT_DATA");
 221                 break;
 222         case BTRFS_BLOCK_GROUP_ITEM_KEY:
 223                 printf("GROUP_ITEM");
 224                 break;
 225         case BTRFS_CHUNK_ITEM_KEY:
 226                 printf("CHUNK_ITEM");
 227                 break;
 228         case BTRFS_DEV_ITEM_KEY:
 229                 printf("DEV_ITEM");
 230                 break;
 231         case BTRFS_DEV_EXTENT_KEY:
 232                 printf("DEV_EXTENT");
 233                 break;
 234         case BTRFS_STRING_ITEM_KEY:
 235                 printf("STRING_ITEM");
 236                 break;
 237         default:
 238                 printf("UNKNOWN");
 239         };
 240 }
 241
 242 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 243 {
 244         int i;
 245         char *str;
 246         struct btrfs_item *item;
 247         struct btrfs_extent_item *ei;
 248         struct btrfs_root_item *ri;
 249         struct btrfs_dir_item *di;
 250         struct btrfs_inode_item *ii;
 251         struct btrfs_file_extent_item *fi;
 252         struct btrfs_csum_item *ci;
 253         struct btrfs_block_group_item *bi;
 254         struct btrfs_extent_ref *ref;
 255         struct btrfs_inode_ref *iref;
 256         struct btrfs_dev_extent *dev_extent;
 257         struct btrfs_disk_key disk_key;
 258         struct btrfs_root_item root_item;
 259         struct btrfs_block_group_item bg_item;
 260         u32 nr = btrfs_header_nritems(l);
 261         u32 type;
 262
 263         printf("leaf %llu ptrs %d free space %d generation %llu owner %llu\n",
 264                 (unsigned long long)btrfs_header_bytenr(l), nr,
 265                 btrfs_leaf_free_space(root, l),
 266                 (unsigned long long)btrfs_header_generation(l),
 267                 (unsigned long long)btrfs_header_owner(l));
 268         print_uuids(l);
 269         fflush(stdout);
 270         for (i = 0 ; i < nr ; i++) {
 271                 item = btrfs_item_nr(l, i);
 272                 btrfs_item_key(l, &disk_key, i);
 273                 type = btrfs_disk_key_type(&disk_key);
 274                 printf("\titem %d key (%llu ",
 275                         i,
 276                         (unsigned long long)btrfs_disk_key_objectid(&disk_key));
 277                 print_key_type(type);
 278                 printf(" %llu) itemoff %d itemsize %d\n",
 279                         (unsigned long long)btrfs_disk_key_offset(&disk_key),
 280                         btrfs_item_offset(l, item),
 281                         btrfs_item_size(l, item));
 282                 switch (type) {
 283                 case BTRFS_INODE_ITEM_KEY:
 284                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
 285                         printf("\t\tinode generation %llu size %llu block group %llu mode %o links %u\n",
 286                                (unsigned long long)btrfs_inode_generation(l, ii),
 287                                (unsigned long long)btrfs_inode_size(l, ii),
 288                                (unsigned long long)btrfs_inode_block_group(l,ii),
 289                                btrfs_inode_mode(l, ii),
 290                                btrfs_inode_nlink(l, ii));
 291                         break;
 292                 case BTRFS_INODE_REF_KEY:
 293                         iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
 294                         print_inode_ref_item(l, item, iref);
 295                         break;
 296                 case BTRFS_DIR_ITEM_KEY:
 297                 case BTRFS_DIR_INDEX_KEY:
 298                 case BTRFS_XATTR_ITEM_KEY:
 299                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 300                         print_dir_item(l, item, di);
 301                         break;
 302                 case BTRFS_ORPHAN_ITEM_KEY:
 303                         printf("\t\torphan item\n");
 304                         break;
 305                 case BTRFS_ROOT_ITEM_KEY:
 306                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
 307                         read_extent_buffer(l, &root_item, (unsigned long)ri, sizeof(root_item));
 308                         printf("\t\troot data bytenr %llu level %d dirid %llu refs %u\n",
 309                                 (unsigned long long)btrfs_root_bytenr(&root_item),
 310                                 btrfs_root_level(&root_item),
 311                                 (unsigned long long)btrfs_root_dirid(&root_item),
 312                                 btrfs_root_refs(&root_item));
 313                         if (1 || btrfs_root_refs(&root_item) == 0) {
 314                                 struct btrfs_key drop_key;
 315                                 btrfs_disk_key_to_cpu(&drop_key,
 316                                                       &root_item.drop_progress);
 317                                 printf("\t\tdrop key %Lu %x %Lu level %d\n",
 318                                        (unsigned long long)drop_key.objectid,
 319                                        drop_key.type,
 320                                        (unsigned long long)drop_key.offset,
 321                                        root_item.drop_level);
 322                         }
 323                         break;
 324                 case BTRFS_ROOT_REF_KEY:
 325                         print_root_ref(l, i, "ref");
 326                         break;
 327                 case BTRFS_ROOT_BACKREF_KEY:
 328                         print_root_ref(l, i, "backref");
 329                         break;
 330                 case BTRFS_EXTENT_ITEM_KEY:
 331                         ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
 332                         printf("\t\textent data refs %u\n",
 333                                 btrfs_extent_refs(l, ei));
 334                         break;
 335                 case BTRFS_EXTENT_REF_KEY:
 336                         ref = btrfs_item_ptr(l, i, struct btrfs_extent_ref);
 337                         printf("\t\textent back ref root %llu gen %llu "
 338                                "owner %llu num_refs %lu\n",
 339                                (unsigned long long)btrfs_ref_root(l, ref),
 340                                (unsigned long long)btrfs_ref_generation(l, ref),
 341                                (unsigned long long)btrfs_ref_objectid(l, ref),
 342                                (unsigned long)btrfs_ref_num_refs(l, ref));
 343                         break;
 344                 case BTRFS_CSUM_ITEM_KEY:
 345                         ci = btrfs_item_ptr(l, i, struct btrfs_csum_item);
 346                         printf("\t\tcsum item\n");
 347                         break;
 348                 case BTRFS_EXTENT_CSUM_KEY:
 349                         ci = btrfs_item_ptr(l, i, struct btrfs_csum_item);
 350                         printf("\t\textent csum item\n");
 351                         break;
 352                 case BTRFS_EXTENT_DATA_KEY:
 353                         fi = btrfs_item_ptr(l, i,
 354                                             struct btrfs_file_extent_item);
 355                         print_file_extent_item(l, item, fi);
 356                         break;
 357                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 358                         bi = btrfs_item_ptr(l, i,
 359                                             struct btrfs_block_group_item);
 360                         read_extent_buffer(l, &bg_item, (unsigned long)bi,
 361                                            sizeof(bg_item));
 362                         printf("\t\tblock group used %llu flags %llu\n",
 363                                (unsigned long long)btrfs_block_group_used(&bg_item),
 364                                (unsigned long long)btrfs_block_group_flags(&bg_item));
 365                         break;
 366                 case BTRFS_CHUNK_ITEM_KEY:
 367                         print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
 368                         break;
 369                 case BTRFS_DEV_ITEM_KEY:
 370                         print_dev_item(l, btrfs_item_ptr(l, i,
 371                                         struct btrfs_dev_item));
 372                         break;
 373                 case BTRFS_DEV_EXTENT_KEY:
 374                         dev_extent = btrfs_item_ptr(l, i,
 375                                                     struct btrfs_dev_extent);
 376                         printf("\t\tdev extent chunk_tree %llu\n"
 377                                "\t\tchunk objectid %llu chunk offset %llu "
 378                                "length %llu\n",
 379                                (unsigned long long)
 380                                btrfs_dev_extent_chunk_tree(l, dev_extent),
 381                                (unsigned long long)
 382                                btrfs_dev_extent_chunk_objectid(l, dev_extent),
 383                                (unsigned long long)
 384                                btrfs_dev_extent_chunk_offset(l, dev_extent),
 385                                (unsigned long long)
 386                                btrfs_dev_extent_length(l, dev_extent));
 387                         break;
 388                 case BTRFS_STRING_ITEM_KEY:
 389                         /* dirty, but it's simple */
 390                         str = l->data + btrfs_item_ptr_offset(l, i);
 391                         printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
 392                         break;
 393                 };
 394                 fflush(stdout);
 395         }
 396 }
 397
 398 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb)
 399 {
 400         int i;
 401         u32 nr;
 402         u32 size;
 403         struct btrfs_key key;
 404
 405         if (!eb)
 406                 return;
 407         nr = btrfs_header_nritems(eb);
 408         if (btrfs_is_leaf(eb)) {
 409                 btrfs_print_leaf(root, eb);
 410                 return;
 411         }
 412         printf("node %llu level %d ptrs %d free %u generation %llu owner %llu\n",
 413                (unsigned long long)eb->start,
 414                 btrfs_header_level(eb), nr,
 415                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
 416                 (unsigned long long)btrfs_header_generation(eb),
 417                 (unsigned long long)btrfs_header_owner(eb));
 418         print_uuids(eb);
 419         fflush(stdout);
 420         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
 421         for (i = 0; i < nr; i++) {
 422                 u64 blocknr = btrfs_node_blockptr(eb, i);
 423                 btrfs_node_key_to_cpu(eb, &key, i);
 424                 printf("\tkey %d (%llu ",
 425                        i,
 426                        (unsigned long long)key.objectid);
 427                 print_key_type(key.type);
 428                 printf(" %llu) block %llu (%llu) gen %llu\n",
 429                        (unsigned long long)key.offset,
 430                        (unsigned long long)blocknr,
 431                        (unsigned long long)blocknr / size,
 432                        (unsigned long long)btrfs_node_ptr_generation(eb, i));
 433                 fflush(stdout);
 434         }
 435         for (i = 0; i < nr; i++) {
 436                 struct extent_buffer *next = read_tree_block(root,
 437                                              btrfs_node_blockptr(eb, i),
 438                                              size,
 439                                              btrfs_node_ptr_generation(eb, i));
 440                 if (btrfs_is_leaf(next) &&
 441                     btrfs_header_level(eb) != 1)
 442                         BUG();
 443                 if (btrfs_header_level(next) !=
 444                         btrfs_header_level(eb) - 1)
 445                         BUG();
 446                 btrfs_print_tree(root, next);
 447                 free_extent_buffer(next);
 448         }
 449 }
 450