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 "version.h"
  30 #include "utils.h"
  31
  32 static int print_usage(void)
  33 {
  34         fprintf(stderr, "usage: btrfs-debug-tree [-e] [-d] [-r] [-R] [-u]\n");
  35         fprintf(stderr, "                        [-b block_num ] device\n");
  36         fprintf(stderr, "\t-e : print detailed extents info\n");
  37         fprintf(stderr, "\t-d : print info of btrfs device and root tree dirs"
  38                     " only\n");
  39         fprintf(stderr, "\t-r : print info of roots only\n");
  40         fprintf(stderr, "\t-R : print info of roots and root backups\n");
  41         fprintf(stderr, "\t-u : print info of uuid tree only\n");
  42         fprintf(stderr, "\t-b block_num : print info of the specified block"
  43                     " only\n");
  44         fprintf(stderr,
  45                 "\t-t tree_id : print only the tree with the given id\n");
  46         fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
  47         exit(1);
  48 }
  49
  50 static void print_extents(struct btrfs_root *root, struct extent_buffer *eb)
  51 {
  52         int i;
  53         u32 nr;
  54         u32 size;
  55
  56         if (!eb)
  57                 return;
  58
  59         if (btrfs_is_leaf(eb)) {
  60                 btrfs_print_leaf(root, eb);
  61                 return;
  62         }
  63
  64         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
  65         nr = btrfs_header_nritems(eb);
  66         for (i = 0; i < nr; i++) {
  67                 struct extent_buffer *next = read_tree_block(root,
  68                                              btrfs_node_blockptr(eb, i),
  69                                              size,
  70                                              btrfs_node_ptr_generation(eb, i));
  71                 if (btrfs_is_leaf(next) &&
  72                     btrfs_header_level(eb) != 1)
  73                         BUG();
  74                 if (btrfs_header_level(next) !=
  75                         btrfs_header_level(eb) - 1)
  76                         BUG();
  77                 print_extents(root, next);
  78                 free_extent_buffer(next);
  79         }
  80 }
  81
  82 static void print_old_roots(struct btrfs_super_block *super)
  83 {
  84         struct btrfs_root_backup *backup;
  85         int i;
  86
  87         for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) {
  88                 backup = super->super_roots + i;
  89                 printf("btrfs root backup slot %d\n", i);
  90                 printf("\ttree root gen %llu block %llu\n",
  91                        (unsigned long long)btrfs_backup_tree_root_gen(backup),
  92                        (unsigned long long)btrfs_backup_tree_root(backup));
  93
  94                 printf("\t\textent root gen %llu block %llu\n",
  95                        (unsigned long long)btrfs_backup_extent_root_gen(backup),
  96                        (unsigned long long)btrfs_backup_extent_root(backup));
  97
  98                 printf("\t\tchunk root gen %llu block %llu\n",
  99                        (unsigned long long)btrfs_backup_chunk_root_gen(backup),
 100                        (unsigned long long)btrfs_backup_chunk_root(backup));
 101
 102                 printf("\t\tdevice root gen %llu block %llu\n",
 103                        (unsigned long long)btrfs_backup_dev_root_gen(backup),
 104                        (unsigned long long)btrfs_backup_dev_root(backup));
 105
 106                 printf("\t\tcsum root gen %llu block %llu\n",
 107                        (unsigned long long)btrfs_backup_csum_root_gen(backup),
 108                        (unsigned long long)btrfs_backup_csum_root(backup));
 109
 110                 printf("\t\tfs root gen %llu block %llu\n",
 111                        (unsigned long long)btrfs_backup_fs_root_gen(backup),
 112                        (unsigned long long)btrfs_backup_fs_root(backup));
 113
 114                 printf("\t\t%llu used %llu total %llu devices\n",
 115                        (unsigned long long)btrfs_backup_bytes_used(backup),
 116                        (unsigned long long)btrfs_backup_total_bytes(backup),
 117                        (unsigned long long)btrfs_backup_num_devices(backup));
 118         }
 119 }
 120
 121 int main(int ac, char **av)
 122 {
 123         struct btrfs_root *root;
 124         struct btrfs_fs_info *info;
 125         struct btrfs_path path;
 126         struct btrfs_key key;
 127         struct btrfs_root_item ri;
 128         struct extent_buffer *leaf;
 129         struct btrfs_disk_key disk_key;
 130         struct btrfs_key found_key;
 131         char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
 132         int ret;
 133         int slot;
 134         int extent_only = 0;
 135         int device_only = 0;
 136         int uuid_tree_only = 0;
 137         int roots_only = 0;
 138         int root_backups = 0;
 139         u64 block_only = 0;
 140         struct btrfs_root *tree_root_scan;
 141         u64 tree_id = 0;
 142
 143         radix_tree_init();
 144
 145         while(1) {
 146                 int c;
 147                 c = getopt(ac, av, "deb:rRut:");
 148                 if (c < 0)
 149                         break;
 150                 switch(c) {
 151                         case 'e':
 152                                 extent_only = 1;
 153                                 break;
 154                         case 'd':
 155                                 device_only = 1;
 156                                 break;
 157                         case 'r':
 158                                 roots_only = 1;
 159                                 break;
 160                         case 'u':
 161                                 uuid_tree_only = 1;
 162                                 break;
 163                         case 'R':
 164                                 roots_only = 1;
 165                                 root_backups = 1;
 166                                 break;
 167                         case 'b':
 168                                 block_only = arg_strtou64(optarg);
 169                                 break;
 170                         case 't':
 171                                 tree_id = arg_strtou64(optarg);
 172                                 break;
 173                         default:
 174                                 print_usage();
 175                 }
 176         }
 177         set_argv0(av);
 178         ac = ac - optind;
 179         if (check_argc_exact(ac, 1))
 180                 print_usage();
 181
 182         ret = check_arg_type(av[optind]);
 183         if (ret != BTRFS_ARG_BLKDEV && ret != BTRFS_ARG_REG) {
 184                 fprintf(stderr, "'%s' is not a block device or regular file\n",
 185                         av[optind]);
 186                 exit(1);
 187         }
 188
 189         info = open_ctree_fs_info(av[optind], 0, 0, OPEN_CTREE_PARTIAL);
 190         if (!info) {
 191                 fprintf(stderr, "unable to open %s\n", av[optind]);
 192                 exit(1);
 193         }
 194
 195         root = info->fs_root;
 196         if (!root) {
 197                 fprintf(stderr, "unable to open %s\n", av[optind]);
 198                 exit(1);
 199         }
 200
 201         if (block_only) {
 202                 leaf = read_tree_block(root,
 203                                       block_only,
 204                                       root->leafsize, 0);
 205
 206                 if (leaf && btrfs_header_level(leaf) != 0) {
 207                         free_extent_buffer(leaf);
 208                         leaf = NULL;
 209                 }
 210
 211                 if (!leaf) {
 212                         leaf = read_tree_block(root,
 213                                               block_only,
 214                                               root->nodesize, 0);
 215                 }
 216                 if (!leaf) {
 217                         fprintf(stderr, "failed to read %llu\n",
 218                                 (unsigned long long)block_only);
 219                         goto close_root;
 220                 }
 221                 btrfs_print_tree(root, leaf, 0);
 222                 goto close_root;
 223         }
 224
 225         if (!(extent_only || uuid_tree_only || tree_id)) {
 226                 if (roots_only) {
 227                         printf("root tree: %llu level %d\n",
 228                              (unsigned long long)info->tree_root->node->start,
 229                              btrfs_header_level(info->tree_root->node));
 230                         printf("chunk tree: %llu level %d\n",
 231                              (unsigned long long)info->chunk_root->node->start,
 232                              btrfs_header_level(info->chunk_root->node));
 233                 } else {
 234                         if (info->tree_root->node) {
 235                                 printf("root tree\n");
 236                                 btrfs_print_tree(info->tree_root,
 237                                                  info->tree_root->node, 1);
 238                         }
 239
 240                         if (info->chunk_root->node) {
 241                                 printf("chunk tree\n");
 242                                 btrfs_print_tree(info->chunk_root,
 243                                                  info->chunk_root->node, 1);
 244                         }
 245                 }
 246         }
 247         tree_root_scan = info->tree_root;
 248
 249         btrfs_init_path(&path);
 250 again:
 251         if (!extent_buffer_uptodate(tree_root_scan->node))
 252                 goto no_node;
 253
 254         key.offset = 0;
 255         key.objectid = 0;
 256         btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
 257         ret = btrfs_search_slot(NULL, tree_root_scan, &key, &path, 0, 0);
 258         BUG_ON(ret < 0);
 259         while(1) {
 260                 leaf = path.nodes[0];
 261                 slot = path.slots[0];
 262                 if (slot >= btrfs_header_nritems(leaf)) {
 263                         ret = btrfs_next_leaf(tree_root_scan, &path);
 264                         if (ret != 0)
 265                                 break;
 266                         leaf = path.nodes[0];
 267                         slot = path.slots[0];
 268                 }
 269                 btrfs_item_key(leaf, &disk_key, path.slots[0]);
 270                 btrfs_disk_key_to_cpu(&found_key, &disk_key);
 271                 if (btrfs_key_type(&found_key) == BTRFS_ROOT_ITEM_KEY) {
 272                         unsigned long offset;
 273                         struct extent_buffer *buf;
 274                         int skip = extent_only | device_only | uuid_tree_only;
 275
 276                         offset = btrfs_item_ptr_offset(leaf, slot);
 277                         read_extent_buffer(leaf, &ri, offset, sizeof(ri));
 278                         buf = read_tree_block(tree_root_scan,
 279                                               btrfs_root_bytenr(&ri),
 280                                               btrfs_level_size(tree_root_scan,
 281                                                         btrfs_root_level(&ri)),
 282                                               0);
 283                         if (!extent_buffer_uptodate(buf))
 284                                 goto next;
 285                         if (tree_id && found_key.objectid != tree_id)
 286                                 goto next;
 287
 288                         switch(found_key.objectid) {
 289                         case BTRFS_ROOT_TREE_OBJECTID:
 290                                 if (!skip)
 291                                         printf("root");
 292                                 break;
 293                         case BTRFS_EXTENT_TREE_OBJECTID:
 294                                 if (!device_only && !uuid_tree_only)
 295                                         skip = 0;
 296                                 if (!skip)
 297                                         printf("extent");
 298                                 break;
 299                         case BTRFS_CHUNK_TREE_OBJECTID:
 300                                 if (!skip) {
 301                                         printf("chunk");
 302                                 }
 303                                 break;
 304                         case BTRFS_DEV_TREE_OBJECTID:
 305                                 if (!uuid_tree_only)
 306                                         skip = 0;
 307                                 if (!skip)
 308                                         printf("device");
 309                                 break;
 310                         case BTRFS_FS_TREE_OBJECTID:
 311                                 if (!skip) {
 312                                         printf("fs");
 313                                 }
 314                                 break;
 315                         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 316                                 skip = 0;
 317                                 printf("directory");
 318                                 break;
 319                         case BTRFS_CSUM_TREE_OBJECTID:
 320                                 if (!skip) {
 321                                         printf("checksum");
 322                                 }
 323                                 break;
 324                         case BTRFS_ORPHAN_OBJECTID:
 325                                 if (!skip) {
 326                                         printf("orphan");
 327                                 }
 328                                 break;
 329                         case BTRFS_TREE_LOG_OBJECTID:
 330                                 if (!skip) {
 331                                         printf("log");
 332                                 }
 333                                 break;
 334                         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 335                                 if (!skip) {
 336                                         printf("log fixup");
 337                                 }
 338                                 break;
 339                         case BTRFS_TREE_RELOC_OBJECTID:
 340                                 if (!skip) {
 341                                         printf("reloc");
 342                                 }
 343                                 break;
 344                         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 345                                 if (!skip) {
 346                                         printf("data reloc");
 347                                 }
 348                                 break;
 349                         case BTRFS_EXTENT_CSUM_OBJECTID:
 350                                 if (!skip) {
 351                                         printf("extent checksum");
 352                                 }
 353                                 break;
 354                         case BTRFS_QUOTA_TREE_OBJECTID:
 355                                 if (!skip) {
 356                                         printf("quota");
 357                                 }
 358                                 break;
 359                         case BTRFS_UUID_TREE_OBJECTID:
 360                                 if (!extent_only && !device_only)
 361                                         skip = 0;
 362                                 if (!skip)
 363                                         printf("uuid");
 364                                 break;
 365                         case BTRFS_MULTIPLE_OBJECTIDS:
 366                                 if (!skip) {
 367                                         printf("multiple");
 368                                 }
 369                                 break;
 370                         default:
 371                                 if (!skip) {
 372                                         printf("file");
 373                                 }
 374                         }
 375                         if (extent_only && !skip) {
 376                                 print_extents(tree_root_scan, buf);
 377                         } else if (!skip) {
 378                                 printf(" tree ");
 379                                 btrfs_print_key(&disk_key);
 380                                 if (roots_only) {
 381                                         printf(" %llu level %d\n",
 382                                                (unsigned long long)buf->start,
 383                                                btrfs_header_level(buf));
 384                                 } else {
 385                                         printf(" \n");
 386                                         btrfs_print_tree(tree_root_scan, buf, 1);
 387                                 }
 388                         }
 389                         free_extent_buffer(buf);
 390                 }
 391 next:
 392                 path.slots[0]++;
 393         }
 394 no_node:
 395         btrfs_release_path(&path);
 396
 397         if (tree_root_scan == info->tree_root &&
 398             info->log_root_tree) {
 399                 tree_root_scan = info->log_root_tree;
 400                 goto again;
 401         }
 402
 403         if (extent_only || device_only || uuid_tree_only)
 404                 goto close_root;
 405
 406         if (root_backups)
 407                 print_old_roots(info->super_copy);
 408
 409         printf("total bytes %llu\n",
 410                (unsigned long long)btrfs_super_total_bytes(info->super_copy));
 411         printf("bytes used %llu\n",
 412                (unsigned long long)btrfs_super_bytes_used(info->super_copy));
 413         uuidbuf[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 414         uuid_unparse(info->super_copy->fsid, uuidbuf);
 415         printf("uuid %s\n", uuidbuf);
 416         printf("%s\n", BTRFS_BUILD_VERSION);
 417 close_root:
 418         return close_ctree(root);
 419 }