btrfs-debug-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 "kerncompat.h"
  24 #include "radix-tree.h"
  25 #include "ctree.h"
  26 #include "disk-io.h"
  27 #include "print-tree.h"
  28 #include "transaction.h"
  29 #include "utils.h"
  30
  31 static int print_usage(void)
  32 {
  33         fprintf(stderr, "usage: btrfs-debug-tree [-e] [-d] [-r] [-R] [-u]\n");
  34         fprintf(stderr, "                        [-b block_num ] device\n");
  35         fprintf(stderr, "\t-e : print detailed extents info\n");
  36         fprintf(stderr, "\t-d : print info of btrfs device and root tree dirs"
  37                     " only\n");
  38         fprintf(stderr, "\t-r : print info of roots only\n");
  39         fprintf(stderr, "\t-R : print info of roots and root backups\n");
  40         fprintf(stderr, "\t-u : print info of uuid tree only\n");
  41         fprintf(stderr, "\t-b block_num : print info of the specified block"
  42                     " only\n");
  43         fprintf(stderr,
  44                 "\t-t tree_id : print only the tree with the given id\n");
  45         fprintf(stderr, "%s\n", PACKAGE_STRING);
  46         exit(1);
  47 }
  48
  49 static void print_extents(struct btrfs_root *root, struct extent_buffer *eb)
  50 {
  51         int i;
  52         u32 nr;
  53         u32 size;
  54
  55         if (!eb)
  56                 return;
  57
  58         if (btrfs_is_leaf(eb)) {
  59                 btrfs_print_leaf(root, eb);
  60                 return;
  61         }
  62
  63         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
  64         nr = btrfs_header_nritems(eb);
  65         for (i = 0; i < nr; i++) {
  66                 struct extent_buffer *next = read_tree_block(root,
  67                                              btrfs_node_blockptr(eb, i),
  68                                              size,
  69                                              btrfs_node_ptr_generation(eb, i));
  70                 if (!extent_buffer_uptodate(next))
  71                         continue;
  72                 if (btrfs_is_leaf(next) &&
  73                     btrfs_header_level(eb) != 1)
  74                         BUG();
  75                 if (btrfs_header_level(next) !=
  76                         btrfs_header_level(eb) - 1)
  77                         BUG();
  78                 print_extents(root, next);
  79                 free_extent_buffer(next);
  80         }
  81 }
  82
  83 static void print_old_roots(struct btrfs_super_block *super)
  84 {
  85         struct btrfs_root_backup *backup;
  86         int i;
  87
  88         for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) {
  89                 backup = super->super_roots + i;
  90                 printf("btrfs root backup slot %d\n", i);
  91                 printf("\ttree root gen %llu block %llu\n",
  92                        (unsigned long long)btrfs_backup_tree_root_gen(backup),
  93                        (unsigned long long)btrfs_backup_tree_root(backup));
  94
  95                 printf("\t\textent root gen %llu block %llu\n",
  96                        (unsigned long long)btrfs_backup_extent_root_gen(backup),
  97                        (unsigned long long)btrfs_backup_extent_root(backup));
  98
  99                 printf("\t\tchunk root gen %llu block %llu\n",
 100                        (unsigned long long)btrfs_backup_chunk_root_gen(backup),
 101                        (unsigned long long)btrfs_backup_chunk_root(backup));
 102
 103                 printf("\t\tdevice root gen %llu block %llu\n",
 104                        (unsigned long long)btrfs_backup_dev_root_gen(backup),
 105                        (unsigned long long)btrfs_backup_dev_root(backup));
 106
 107                 printf("\t\tcsum root gen %llu block %llu\n",
 108                        (unsigned long long)btrfs_backup_csum_root_gen(backup),
 109                        (unsigned long long)btrfs_backup_csum_root(backup));
 110
 111                 printf("\t\tfs root gen %llu block %llu\n",
 112                        (unsigned long long)btrfs_backup_fs_root_gen(backup),
 113                        (unsigned long long)btrfs_backup_fs_root(backup));
 114
 115                 printf("\t\t%llu used %llu total %llu devices\n",
 116                        (unsigned long long)btrfs_backup_bytes_used(backup),
 117                        (unsigned long long)btrfs_backup_total_bytes(backup),
 118                        (unsigned long long)btrfs_backup_num_devices(backup));
 119         }
 120 }
 121
 122 int main(int ac, char **av)
 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         radix_tree_init();
 145
 146         while(1) {
 147                 int c;
 148                 c = getopt(ac, av, "deb:rRut:");
 149                 if (c < 0)
 150                         break;
 151                 switch(c) {
 152                         case 'e':
 153                                 extent_only = 1;
 154                                 break;
 155                         case 'd':
 156                                 device_only = 1;
 157                                 break;
 158                         case 'r':
 159                                 roots_only = 1;
 160                                 break;
 161                         case 'u':
 162                                 uuid_tree_only = 1;
 163                                 break;
 164                         case 'R':
 165                                 roots_only = 1;
 166                                 root_backups = 1;
 167                                 break;
 168                         case 'b':
 169                                 block_only = arg_strtou64(optarg);
 170                                 break;
 171                         case 't':
 172                                 tree_id = arg_strtou64(optarg);
 173                                 break;
 174                         default:
 175                                 print_usage();
 176                 }
 177         }
 178         set_argv0(av);
 179         ac = ac - optind;
 180         if (check_argc_exact(ac, 1))
 181                 print_usage();
 182
 183         ret = check_arg_type(av[optind]);
 184         if (ret != BTRFS_ARG_BLKDEV && ret != BTRFS_ARG_REG) {
 185                 fprintf(stderr, "'%s' is not a block device or regular file\n",
 186                         av[optind]);
 187                 exit(1);
 188         }
 189
 190         info = open_ctree_fs_info(av[optind], 0, 0, OPEN_CTREE_PARTIAL);
 191         if (!info) {
 192                 fprintf(stderr, "unable to open %s\n", av[optind]);
 193                 exit(1);
 194         }
 195
 196         root = info->fs_root;
 197         if (!root) {
 198                 fprintf(stderr, "unable to open %s\n", av[optind]);
 199                 exit(1);
 200         }
 201
 202         if (block_only) {
 203                 leaf = read_tree_block(root,
 204                                       block_only,
 205                                       root->leafsize, 0);
 206
 207                 if (extent_buffer_uptodate(leaf) &&
 208                     btrfs_header_level(leaf) != 0) {
 209                         free_extent_buffer(leaf);
 210                         leaf = NULL;
 211                 }
 212
 213                 if (!leaf) {
 214                         leaf = read_tree_block(root,
 215                                               block_only,
 216                                               root->nodesize, 0);
 217                 }
 218                 if (!extent_buffer_uptodate(leaf)) {
 219                         fprintf(stderr, "failed to read %llu\n",
 220                                 (unsigned long long)block_only);
 221                         goto close_root;
 222                 }
 223                 btrfs_print_tree(root, leaf, 0);
 224                 goto close_root;
 225         }
 226
 227         if (!(extent_only || uuid_tree_only || tree_id)) {
 228                 if (roots_only) {
 229                         printf("root tree: %llu level %d\n",
 230                              (unsigned long long)info->tree_root->node->start,
 231                              btrfs_header_level(info->tree_root->node));
 232                         printf("chunk tree: %llu level %d\n",
 233                              (unsigned long long)info->chunk_root->node->start,
 234                              btrfs_header_level(info->chunk_root->node));
 235                 } else {
 236                         if (info->tree_root->node) {
 237                                 printf("root tree\n");
 238                                 btrfs_print_tree(info->tree_root,
 239                                                  info->tree_root->node, 1);
 240                         }
 241
 242                         if (info->chunk_root->node) {
 243                                 printf("chunk tree\n");
 244                                 btrfs_print_tree(info->chunk_root,
 245                                                  info->chunk_root->node, 1);
 246                         }
 247                 }
 248         }
 249         tree_root_scan = info->tree_root;
 250
 251         btrfs_init_path(&path);
 252 again:
 253         if (!extent_buffer_uptodate(tree_root_scan->node))
 254                 goto no_node;
 255
 256         key.offset = 0;
 257         key.objectid = 0;
 258         btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
 259         ret = btrfs_search_slot(NULL, tree_root_scan, &key, &path, 0, 0);
 260         BUG_ON(ret < 0);
 261         while(1) {
 262                 leaf = path.nodes[0];
 263                 slot = path.slots[0];
 264                 if (slot >= btrfs_header_nritems(leaf)) {
 265                         ret = btrfs_next_leaf(tree_root_scan, &path);
 266                         if (ret != 0)
 267                                 break;
 268                         leaf = path.nodes[0];
 269                         slot = path.slots[0];
 270                 }
 271                 btrfs_item_key(leaf, &disk_key, path.slots[0]);
 272                 btrfs_disk_key_to_cpu(&found_key, &disk_key);
 273                 if (btrfs_key_type(&found_key) == BTRFS_ROOT_ITEM_KEY) {
 274                         unsigned long offset;
 275                         struct extent_buffer *buf;
 276                         int skip = extent_only | device_only | uuid_tree_only;
 277
 278                         offset = btrfs_item_ptr_offset(leaf, slot);
 279                         read_extent_buffer(leaf, &ri, offset, sizeof(ri));
 280                         buf = read_tree_block(tree_root_scan,
 281                                               btrfs_root_bytenr(&ri),
 282                                               btrfs_level_size(tree_root_scan,
 283                                                         btrfs_root_level(&ri)),
 284                                               0);
 285                         if (!extent_buffer_uptodate(buf))
 286                                 goto next;
 287                         if (tree_id && found_key.objectid != tree_id)
 288                                 goto next;
 289
 290                         switch(found_key.objectid) {
 291                         case BTRFS_ROOT_TREE_OBJECTID:
 292                                 if (!skip)
 293                                         printf("root");
 294                                 break;
 295                         case BTRFS_EXTENT_TREE_OBJECTID:
 296                                 if (!device_only && !uuid_tree_only)
 297                                         skip = 0;
 298                                 if (!skip)
 299                                         printf("extent");
 300                                 break;
 301                         case BTRFS_CHUNK_TREE_OBJECTID:
 302                                 if (!skip) {
 303                                         printf("chunk");
 304                                 }
 305                                 break;
 306                         case BTRFS_DEV_TREE_OBJECTID:
 307                                 if (!uuid_tree_only)
 308                                         skip = 0;
 309                                 if (!skip)
 310                                         printf("device");
 311                                 break;
 312                         case BTRFS_FS_TREE_OBJECTID:
 313                                 if (!skip) {
 314                                         printf("fs");
 315                                 }
 316                                 break;
 317                         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 318                                 skip = 0;
 319                                 printf("directory");
 320                                 break;
 321                         case BTRFS_CSUM_TREE_OBJECTID:
 322                                 if (!skip) {
 323                                         printf("checksum");
 324                                 }
 325                                 break;
 326                         case BTRFS_ORPHAN_OBJECTID:
 327                                 if (!skip) {
 328                                         printf("orphan");
 329                                 }
 330                                 break;
 331                         case BTRFS_TREE_LOG_OBJECTID:
 332                                 if (!skip) {
 333                                         printf("log");
 334                                 }
 335                                 break;
 336                         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 337                                 if (!skip) {
 338                                         printf("log fixup");
 339                                 }
 340                                 break;
 341                         case BTRFS_TREE_RELOC_OBJECTID:
 342                                 if (!skip) {
 343                                         printf("reloc");
 344                                 }
 345                                 break;
 346                         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 347                                 if (!skip) {
 348                                         printf("data reloc");
 349                                 }
 350                                 break;
 351                         case BTRFS_EXTENT_CSUM_OBJECTID:
 352                                 if (!skip) {
 353                                         printf("extent checksum");
 354                                 }
 355                                 break;
 356                         case BTRFS_QUOTA_TREE_OBJECTID:
 357                                 if (!skip) {
 358                                         printf("quota");
 359                                 }
 360                                 break;
 361                         case BTRFS_UUID_TREE_OBJECTID:
 362                                 if (!extent_only && !device_only)
 363                                         skip = 0;
 364                                 if (!skip)
 365                                         printf("uuid");
 366                                 break;
 367                         case BTRFS_MULTIPLE_OBJECTIDS:
 368                                 if (!skip) {
 369                                         printf("multiple");
 370                                 }
 371                                 break;
 372                         default:
 373                                 if (!skip) {
 374                                         printf("file");
 375                                 }
 376                         }
 377                         if (extent_only && !skip) {
 378                                 print_extents(tree_root_scan, buf);
 379                         } else if (!skip) {
 380                                 printf(" tree ");
 381                                 btrfs_print_key(&disk_key);
 382                                 if (roots_only) {
 383                                         printf(" %llu level %d\n",
 384                                                (unsigned long long)buf->start,
 385                                                btrfs_header_level(buf));
 386                                 } else {
 387                                         printf(" \n");
 388                                         btrfs_print_tree(tree_root_scan, buf, 1);
 389                                 }
 390                         }
 391                         free_extent_buffer(buf);
 392                 }
 393 next:
 394                 path.slots[0]++;
 395         }
 396 no_node:
 397         btrfs_release_path(&path);
 398
 399         if (tree_root_scan == info->tree_root &&
 400             info->log_root_tree) {
 401                 tree_root_scan = info->log_root_tree;
 402                 goto again;
 403         }
 404
 405         if (extent_only || device_only || uuid_tree_only)
 406                 goto close_root;
 407
 408         if (root_backups)
 409                 print_old_roots(info->super_copy);
 410
 411         printf("total bytes %llu\n",
 412                (unsigned long long)btrfs_super_total_bytes(info->super_copy));
 413         printf("bytes used %llu\n",
 414                (unsigned long long)btrfs_super_bytes_used(info->super_copy));
 415         uuidbuf[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 416         uuid_unparse(info->super_copy->fsid, uuidbuf);
 417         printf("uuid %s\n", uuidbuf);
 418         printf("%s\n", PACKAGE_STRING);
 419 close_root:
 420         return close_ctree(root);
 421 }