cmds-inspect-dump-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 <unistd.h>
  22 #include <uuid/uuid.h>
  23 #include <getopt.h>
  24
  25 #include "kerncompat.h"
  26 #include "radix-tree.h"
  27 #include "ctree.h"
  28 #include "disk-io.h"
  29 #include "print-tree.h"
  30 #include "transaction.h"
  31 #include "volumes.h"
  32 #include "commands.h"
  33 #include "utils.h"
  34 #include "cmds-inspect-dump-tree.h"
  35
  36 static void print_extents(struct btrfs_root *root, struct extent_buffer *eb)
  37 {
  38         int i;
  39         u32 nr;
  40         u32 size;
  41
  42         if (!eb)
  43                 return;
  44
  45         if (btrfs_is_leaf(eb)) {
  46                 btrfs_print_leaf(root, eb);
  47                 return;
  48         }
  49
  50         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
  51         nr = btrfs_header_nritems(eb);
  52         for (i = 0; i < nr; i++) {
  53                 struct extent_buffer *next = read_tree_block(root,
  54                                              btrfs_node_blockptr(eb, i),
  55                                              size,
  56                                              btrfs_node_ptr_generation(eb, i));
  57                 if (!extent_buffer_uptodate(next))
  58                         continue;
  59                 if (btrfs_is_leaf(next) &&
  60                     btrfs_header_level(eb) != 1)
  61                         BUG();
  62                 if (btrfs_header_level(next) !=
  63                         btrfs_header_level(eb) - 1)
  64                         BUG();
  65                 print_extents(root, next);
  66                 free_extent_buffer(next);
  67         }
  68 }
  69
  70 static void print_old_roots(struct btrfs_super_block *super)
  71 {
  72         struct btrfs_root_backup *backup;
  73         int i;
  74
  75         for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) {
  76                 backup = super->super_roots + i;
  77                 printf("btrfs root backup slot %d\n", i);
  78                 printf("\ttree root gen %llu block %llu\n",
  79                        (unsigned long long)btrfs_backup_tree_root_gen(backup),
  80                        (unsigned long long)btrfs_backup_tree_root(backup));
  81
  82                 printf("\t\textent root gen %llu block %llu\n",
  83                        (unsigned long long)btrfs_backup_extent_root_gen(backup),
  84                        (unsigned long long)btrfs_backup_extent_root(backup));
  85
  86                 printf("\t\tchunk root gen %llu block %llu\n",
  87                        (unsigned long long)btrfs_backup_chunk_root_gen(backup),
  88                        (unsigned long long)btrfs_backup_chunk_root(backup));
  89
  90                 printf("\t\tdevice root gen %llu block %llu\n",
  91                        (unsigned long long)btrfs_backup_dev_root_gen(backup),
  92                        (unsigned long long)btrfs_backup_dev_root(backup));
  93
  94                 printf("\t\tcsum root gen %llu block %llu\n",
  95                        (unsigned long long)btrfs_backup_csum_root_gen(backup),
  96                        (unsigned long long)btrfs_backup_csum_root(backup));
  97
  98                 printf("\t\tfs root gen %llu block %llu\n",
  99                        (unsigned long long)btrfs_backup_fs_root_gen(backup),
 100                        (unsigned long long)btrfs_backup_fs_root(backup));
 101
 102                 printf("\t\t%llu used %llu total %llu devices\n",
 103                        (unsigned long long)btrfs_backup_bytes_used(backup),
 104                        (unsigned long long)btrfs_backup_total_bytes(backup),
 105                        (unsigned long long)btrfs_backup_num_devices(backup));
 106         }
 107 }
 108
 109 const char * const cmd_inspect_dump_tree_usage[] = {
 110         "btrfs inspect-internal dump-tree [options] device",
 111         "Dump structures from a device",
 112         "-e|--extents           print detailed extents info",
 113         "-d|--device            print info of btrfs device and root tree dir only",
 114         "-r|--roots             print info of roots only",
 115         "-R|--backups           print info of roots and root backups",
 116         "-u|--uuid              print info of uuid tree only",
 117         "-b|--block <block_num> print info of the specified block only",
 118         "-t|--tree  <tree_id>   print only the tree with the given id",
 119         NULL
 120 };
 121
 122 int cmd_inspect_dump_tree(int argc, char **argv)
 123 {
 124         struct btrfs_root *root;
 125         struct btrfs_fs_info *info;
 126         struct btrfs_path path;
 127         struct btrfs_key key;
 128         struct btrfs_root_item ri;
 129         struct extent_buffer *leaf;
 130         struct btrfs_disk_key disk_key;
 131         struct btrfs_key found_key;
 132         char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
 133         int ret;
 134         int slot;
 135         int extent_only = 0;
 136         int device_only = 0;
 137         int uuid_tree_only = 0;
 138         int roots_only = 0;
 139         int root_backups = 0;
 140         u64 block_only = 0;
 141         struct btrfs_root *tree_root_scan;
 142         u64 tree_id = 0;
 143
 144         while (1) {
 145                 int c;
 146                 static const struct option long_options[] = {
 147                         { "extents", no_argument, NULL, 'e'},
 148                         { "device", no_argument, NULL, 'd'},
 149                         { "roots", no_argument, NULL, 'r'},
 150                         { "backups", no_argument, NULL, 'R'},
 151                         { "uuid", no_argument, NULL, 'u'},
 152                         { "block", required_argument, NULL, 'b'},
 153                         { "tree", required_argument, NULL, 't'},
 154                         { NULL, 0, NULL, 0 }
 155                 };
 156
 157                 c = getopt_long(argc, argv, "deb:rRut:", long_options, NULL);
 158                 if (c < 0)
 159                         break;
 160                 switch (c) {
 161                 case 'e':
 162                         extent_only = 1;
 163                         break;
 164                 case 'd':
 165                         device_only = 1;
 166                         break;
 167                 case 'r':
 168                         roots_only = 1;
 169                         break;
 170                 case 'u':
 171                         uuid_tree_only = 1;
 172                         break;
 173                 case 'R':
 174                         roots_only = 1;
 175                         root_backups = 1;
 176                         break;
 177                 case 'b':
 178                         block_only = arg_strtou64(optarg);
 179                         break;
 180                 case 't':
 181                         tree_id = arg_strtou64(optarg);
 182                         break;
 183                 default:
 184                         usage(cmd_inspect_dump_tree_usage);
 185                 }
 186         }
 187
 188         if (check_argc_exact(argc - optind, 1))
 189                 usage(cmd_inspect_dump_tree_usage);
 190
 191         ret = check_arg_type(argv[optind]);
 192         if (ret != BTRFS_ARG_BLKDEV && ret != BTRFS_ARG_REG) {
 193                 error("not a block device or regular file: %s", argv[optind]);
 194                 goto out;
 195         }
 196
 197         printf("%s\n", PACKAGE_STRING);
 198
 199         info = open_ctree_fs_info(argv[optind], 0, 0, 0, OPEN_CTREE_PARTIAL);
 200         if (!info) {
 201                 error("unable to open %s", argv[optind]);
 202                 goto out;
 203         }
 204
 205         root = info->fs_root;
 206         if (!root) {
 207                 error("unable to open %s", argv[optind]);
 208                 goto out;
 209         }
 210
 211         if (block_only) {
 212                 leaf = read_tree_block(root,
 213                                       block_only,
 214                                       root->leafsize, 0);
 215
 216                 if (extent_buffer_uptodate(leaf) &&
 217                     btrfs_header_level(leaf) != 0) {
 218                         free_extent_buffer(leaf);
 219                         leaf = NULL;
 220                 }
 221
 222                 if (!leaf) {
 223                         leaf = read_tree_block(root,
 224                                               block_only,
 225                                               root->nodesize, 0);
 226                 }
 227                 if (!extent_buffer_uptodate(leaf)) {
 228                         error("failed to read %llu",
 229                                 (unsigned long long)block_only);
 230                         goto close_root;
 231                 }
 232                 btrfs_print_tree(root, leaf, 0);
 233                 free_extent_buffer(leaf);
 234                 goto close_root;
 235         }
 236
 237         if (!(extent_only || uuid_tree_only || tree_id)) {
 238                 if (roots_only) {
 239                         printf("root tree: %llu level %d\n",
 240                              (unsigned long long)info->tree_root->node->start,
 241                              btrfs_header_level(info->tree_root->node));
 242                         printf("chunk tree: %llu level %d\n",
 243                              (unsigned long long)info->chunk_root->node->start,
 244                              btrfs_header_level(info->chunk_root->node));
 245                 } else {
 246                         if (info->tree_root->node) {
 247                                 printf("root tree\n");
 248                                 btrfs_print_tree(info->tree_root,
 249                                                  info->tree_root->node, 1);
 250                         }
 251
 252                         if (info->chunk_root->node) {
 253                                 printf("chunk tree\n");
 254                                 btrfs_print_tree(info->chunk_root,
 255                                                  info->chunk_root->node, 1);
 256                         }
 257                 }
 258         }
 259         tree_root_scan = info->tree_root;
 260
 261         btrfs_init_path(&path);
 262 again:
 263         if (!extent_buffer_uptodate(tree_root_scan->node))
 264                 goto no_node;
 265
 266         /*
 267          * Tree's that are not pointed by the tree of tree roots
 268          */
 269         if (tree_id && tree_id == BTRFS_ROOT_TREE_OBJECTID) {
 270                 if (!info->tree_root->node) {
 271                         error("cannot print root tree, invalid pointer");
 272                         goto no_node;
 273                 }
 274                 printf("root tree\n");
 275                 btrfs_print_tree(info->tree_root, info->tree_root->node, 1);
 276                 goto no_node;
 277         }
 278
 279         if (tree_id && tree_id == BTRFS_CHUNK_TREE_OBJECTID) {
 280                 if (!info->chunk_root->node) {
 281                         error("cannot print chunk tree, invalid pointer");
 282                         goto no_node;
 283                 }
 284                 printf("chunk tree\n");
 285                 btrfs_print_tree(info->chunk_root, info->chunk_root->node, 1);
 286                 goto no_node;
 287         }
 288
 289         key.offset = 0;
 290         key.objectid = 0;
 291         btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
 292         ret = btrfs_search_slot(NULL, tree_root_scan, &key, &path, 0, 0);
 293         BUG_ON(ret < 0);
 294         while (1) {
 295                 leaf = path.nodes[0];
 296                 slot = path.slots[0];
 297                 if (slot >= btrfs_header_nritems(leaf)) {
 298                         ret = btrfs_next_leaf(tree_root_scan, &path);
 299                         if (ret != 0)
 300                                 break;
 301                         leaf = path.nodes[0];
 302                         slot = path.slots[0];
 303                 }
 304                 btrfs_item_key(leaf, &disk_key, path.slots[0]);
 305                 btrfs_disk_key_to_cpu(&found_key, &disk_key);
 306                 if (btrfs_key_type(&found_key) == BTRFS_ROOT_ITEM_KEY) {
 307                         unsigned long offset;
 308                         struct extent_buffer *buf;
 309                         int skip = extent_only | device_only | uuid_tree_only;
 310
 311                         offset = btrfs_item_ptr_offset(leaf, slot);
 312                         read_extent_buffer(leaf, &ri, offset, sizeof(ri));
 313                         buf = read_tree_block(tree_root_scan,
 314                                               btrfs_root_bytenr(&ri),
 315                                               btrfs_level_size(tree_root_scan,
 316                                                         btrfs_root_level(&ri)),
 317                                               0);
 318                         if (!extent_buffer_uptodate(buf))
 319                                 goto next;
 320                         if (tree_id && found_key.objectid != tree_id) {
 321                                 free_extent_buffer(buf);
 322                                 goto next;
 323                         }
 324
 325                         switch (found_key.objectid) {
 326                         case BTRFS_ROOT_TREE_OBJECTID:
 327                                 if (!skip)
 328                                         printf("root");
 329                                 break;
 330                         case BTRFS_EXTENT_TREE_OBJECTID:
 331                                 if (!device_only && !uuid_tree_only)
 332                                         skip = 0;
 333                                 if (!skip)
 334                                         printf("extent");
 335                                 break;
 336                         case BTRFS_CHUNK_TREE_OBJECTID:
 337                                 if (!skip) {
 338                                         printf("chunk");
 339                                 }
 340                                 break;
 341                         case BTRFS_DEV_TREE_OBJECTID:
 342                                 if (!uuid_tree_only)
 343                                         skip = 0;
 344                                 if (!skip)
 345                                         printf("device");
 346                                 break;
 347                         case BTRFS_FS_TREE_OBJECTID:
 348                                 if (!skip) {
 349                                         printf("fs");
 350                                 }
 351                                 break;
 352                         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 353                                 skip = 0;
 354                                 printf("directory");
 355                                 break;
 356                         case BTRFS_CSUM_TREE_OBJECTID:
 357                                 if (!skip) {
 358                                         printf("checksum");
 359                                 }
 360                                 break;
 361                         case BTRFS_ORPHAN_OBJECTID:
 362                                 if (!skip) {
 363                                         printf("orphan");
 364                                 }
 365                                 break;
 366                         case BTRFS_TREE_LOG_OBJECTID:
 367                                 if (!skip) {
 368                                         printf("log");
 369                                 }
 370                                 break;
 371                         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 372                                 if (!skip) {
 373                                         printf("log fixup");
 374                                 }
 375                                 break;
 376                         case BTRFS_TREE_RELOC_OBJECTID:
 377                                 if (!skip) {
 378                                         printf("reloc");
 379                                 }
 380                                 break;
 381                         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 382                                 if (!skip) {
 383                                         printf("data reloc");
 384                                 }
 385                                 break;
 386                         case BTRFS_EXTENT_CSUM_OBJECTID:
 387                                 if (!skip) {
 388                                         printf("extent checksum");
 389                                 }
 390                                 break;
 391                         case BTRFS_QUOTA_TREE_OBJECTID:
 392                                 if (!skip) {
 393                                         printf("quota");
 394                                 }
 395                                 break;
 396                         case BTRFS_UUID_TREE_OBJECTID:
 397                                 if (!extent_only && !device_only)
 398                                         skip = 0;
 399                                 if (!skip)
 400                                         printf("uuid");
 401                                 break;
 402                         case BTRFS_FREE_SPACE_TREE_OBJECTID:
 403                                 if (!skip)
 404                                         printf("free space");
 405                                 break;
 406                         case BTRFS_MULTIPLE_OBJECTIDS:
 407                                 if (!skip) {
 408                                         printf("multiple");
 409                                 }
 410                                 break;
 411                         default:
 412                                 if (!skip) {
 413                                         printf("file");
 414                                 }
 415                         }
 416                         if (extent_only && !skip) {
 417                                 printf(" tree ");
 418                                 btrfs_print_key(&disk_key);
 419                                 printf("\n");
 420                                 print_extents(tree_root_scan, buf);
 421                         } else if (!skip) {
 422                                 printf(" tree ");
 423                                 btrfs_print_key(&disk_key);
 424                                 if (roots_only) {
 425                                         printf(" %llu level %d\n",
 426                                                (unsigned long long)buf->start,
 427                                                btrfs_header_level(buf));
 428                                 } else {
 429                                         printf(" \n");
 430                                         btrfs_print_tree(tree_root_scan, buf, 1);
 431                                 }
 432                         }
 433                         free_extent_buffer(buf);
 434                 }
 435 next:
 436                 path.slots[0]++;
 437         }
 438 no_node:
 439         btrfs_release_path(&path);
 440
 441         if (tree_root_scan == info->tree_root &&
 442             info->log_root_tree) {
 443                 tree_root_scan = info->log_root_tree;
 444                 goto again;
 445         }
 446
 447         if (extent_only || device_only || uuid_tree_only)
 448                 goto close_root;
 449
 450         if (root_backups)
 451                 print_old_roots(info->super_copy);
 452
 453         printf("total bytes %llu\n",
 454                (unsigned long long)btrfs_super_total_bytes(info->super_copy));
 455         printf("bytes used %llu\n",
 456                (unsigned long long)btrfs_super_bytes_used(info->super_copy));
 457         uuidbuf[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 458         uuid_unparse(info->super_copy->fsid, uuidbuf);
 459         printf("uuid %s\n", uuidbuf);
 460 close_root:
 461         ret = close_ctree(root);
 462 out:
 463         return !!ret;
 464 }