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 <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 "utils.h"
  32
  33 static int print_usage(int ret)
  34 {
  35         fprintf(stderr, "usage: btrfs-debug-tree [-e] [-d] [-r] [-R] [-u]\n");
  36         fprintf(stderr, "                        [-b block_num ] device\n");
  37         fprintf(stderr, "\t-e : print detailed extents info\n");
  38         fprintf(stderr, "\t-d : print info of btrfs device and root tree dirs"
  39                     " only\n");
  40         fprintf(stderr, "\t-r : print info of roots only\n");
  41         fprintf(stderr, "\t-R : print info of roots and root backups\n");
  42         fprintf(stderr, "\t-u : print info of uuid tree only\n");
  43         fprintf(stderr, "\t-b block_num : print info of the specified block"
  44                     " only\n");
  45         fprintf(stderr,
  46                 "\t-t tree_id : print only the tree with the given id\n");
  47         fprintf(stderr, "%s\n", PACKAGE_STRING);
  48         exit(ret);
  49 }
  50
  51 static void print_extents(struct btrfs_root *root, struct extent_buffer *eb)
  52 {
  53         int i;
  54         u32 nr;
  55         u32 size;
  56
  57         if (!eb)
  58                 return;
  59
  60         if (btrfs_is_leaf(eb)) {
  61                 btrfs_print_leaf(root, eb);
  62                 return;
  63         }
  64
  65         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
  66         nr = btrfs_header_nritems(eb);
  67         for (i = 0; i < nr; i++) {
  68                 struct extent_buffer *next = read_tree_block(root,
  69                                              btrfs_node_blockptr(eb, i),
  70                                              size,
  71                                              btrfs_node_ptr_generation(eb, i));
  72                 if (!extent_buffer_uptodate(next))
  73                         continue;
  74                 if (btrfs_is_leaf(next) &&
  75                     btrfs_header_level(eb) != 1)
  76                         BUG();
  77                 if (btrfs_header_level(next) !=
  78                         btrfs_header_level(eb) - 1)
  79                         BUG();
  80                 print_extents(root, next);
  81                 free_extent_buffer(next);
  82         }
  83 }
  84
  85 static void print_old_roots(struct btrfs_super_block *super)
  86 {
  87         struct btrfs_root_backup *backup;
  88         int i;
  89
  90         for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) {
  91                 backup = super->super_roots + i;
  92                 printf("btrfs root backup slot %d\n", i);
  93                 printf("\ttree root gen %llu block %llu\n",
  94                        (unsigned long long)btrfs_backup_tree_root_gen(backup),
  95                        (unsigned long long)btrfs_backup_tree_root(backup));
  96
  97                 printf("\t\textent root gen %llu block %llu\n",
  98                        (unsigned long long)btrfs_backup_extent_root_gen(backup),
  99                        (unsigned long long)btrfs_backup_extent_root(backup));
 100
 101                 printf("\t\tchunk root gen %llu block %llu\n",
 102                        (unsigned long long)btrfs_backup_chunk_root_gen(backup),
 103                        (unsigned long long)btrfs_backup_chunk_root(backup));
 104
 105                 printf("\t\tdevice root gen %llu block %llu\n",
 106                        (unsigned long long)btrfs_backup_dev_root_gen(backup),
 107                        (unsigned long long)btrfs_backup_dev_root(backup));
 108
 109                 printf("\t\tcsum root gen %llu block %llu\n",
 110                        (unsigned long long)btrfs_backup_csum_root_gen(backup),
 111                        (unsigned long long)btrfs_backup_csum_root(backup));
 112
 113                 printf("\t\tfs root gen %llu block %llu\n",
 114                        (unsigned long long)btrfs_backup_fs_root_gen(backup),
 115                        (unsigned long long)btrfs_backup_fs_root(backup));
 116
 117                 printf("\t\t%llu used %llu total %llu devices\n",
 118                        (unsigned long long)btrfs_backup_bytes_used(backup),
 119                        (unsigned long long)btrfs_backup_total_bytes(backup),
 120                        (unsigned long long)btrfs_backup_num_devices(backup));
 121         }
 122 }
 123
 124 int main(int ac, char **av)
 125 {
 126         struct btrfs_root *root;
 127         struct btrfs_fs_info *info;
 128         struct btrfs_path path;
 129         struct btrfs_key key;
 130         struct btrfs_root_item ri;
 131         struct extent_buffer *leaf;
 132         struct btrfs_disk_key disk_key;
 133         struct btrfs_key found_key;
 134         char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
 135         int ret;
 136         int slot;
 137         int extent_only = 0;
 138         int device_only = 0;
 139         int uuid_tree_only = 0;
 140         int roots_only = 0;
 141         int root_backups = 0;
 142         u64 block_only = 0;
 143         struct btrfs_root *tree_root_scan;
 144         u64 tree_id = 0;
 145
 146         radix_tree_init();
 147
 148         while(1) {
 149                 int c;
 150                 static const struct option long_options[] = {
 151                         { "help", no_argument, NULL, GETOPT_VAL_HELP},
 152                         { NULL, 0, NULL, 0 }
 153                 };
 154
 155                 c = getopt_long(ac, av, "deb:rRut:", long_options, NULL);
 156                 if (c < 0)
 157                         break;
 158                 switch(c) {
 159                         case 'e':
 160                                 extent_only = 1;
 161                                 break;
 162                         case 'd':
 163                                 device_only = 1;
 164                                 break;
 165                         case 'r':
 166                                 roots_only = 1;
 167                                 break;
 168                         case 'u':
 169                                 uuid_tree_only = 1;
 170                                 break;
 171                         case 'R':
 172                                 roots_only = 1;
 173                                 root_backups = 1;
 174                                 break;
 175                         case 'b':
 176                                 block_only = arg_strtou64(optarg);
 177                                 break;
 178                         case 't':
 179                                 tree_id = arg_strtou64(optarg);
 180                                 break;
 181                         case GETOPT_VAL_HELP:
 182                         default:
 183                                 print_usage(c != GETOPT_VAL_HELP);
 184                 }
 185         }
 186         set_argv0(av);
 187         ac = ac - optind;
 188         if (check_argc_exact(ac, 1))
 189                 print_usage(1);
 190
 191         ret = check_arg_type(av[optind]);
 192         if (ret != BTRFS_ARG_BLKDEV && ret != BTRFS_ARG_REG) {
 193                 fprintf(stderr, "'%s' is not a block device or regular file\n",
 194                         av[optind]);
 195                 exit(1);
 196         }
 197
 198         info = open_ctree_fs_info(av[optind], 0, 0, OPEN_CTREE_PARTIAL);
 199         if (!info) {
 200                 fprintf(stderr, "unable to open %s\n", av[optind]);
 201                 exit(1);
 202         }
 203
 204         root = info->fs_root;
 205         if (!root) {
 206                 fprintf(stderr, "unable to open %s\n", av[optind]);
 207                 exit(1);
 208         }
 209
 210         if (block_only) {
 211                 leaf = read_tree_block(root,
 212                                       block_only,
 213                                       root->leafsize, 0);
 214
 215                 if (extent_buffer_uptodate(leaf) &&
 216                     btrfs_header_level(leaf) != 0) {
 217                         free_extent_buffer(leaf);
 218                         leaf = NULL;
 219                 }
 220
 221                 if (!leaf) {
 222                         leaf = read_tree_block(root,
 223                                               block_only,
 224                                               root->nodesize, 0);
 225                 }
 226                 if (!extent_buffer_uptodate(leaf)) {
 227                         fprintf(stderr, "failed to read %llu\n",
 228                                 (unsigned long long)block_only);
 229                         goto close_root;
 230                 }
 231                 btrfs_print_tree(root, leaf, 0);
 232                 free_extent_buffer(leaf);
 233                 goto close_root;
 234         }
 235
 236         if (!(extent_only || uuid_tree_only || tree_id)) {
 237                 if (roots_only) {
 238                         printf("root tree: %llu level %d\n",
 239                              (unsigned long long)info->tree_root->node->start,
 240                              btrfs_header_level(info->tree_root->node));
 241                         printf("chunk tree: %llu level %d\n",
 242                              (unsigned long long)info->chunk_root->node->start,
 243                              btrfs_header_level(info->chunk_root->node));
 244                 } else {
 245                         if (info->tree_root->node) {
 246                                 printf("root tree\n");
 247                                 btrfs_print_tree(info->tree_root,
 248                                                  info->tree_root->node, 1);
 249                         }
 250
 251                         if (info->chunk_root->node) {
 252                                 printf("chunk tree\n");
 253                                 btrfs_print_tree(info->chunk_root,
 254                                                  info->chunk_root->node, 1);
 255                         }
 256                 }
 257         }
 258         tree_root_scan = info->tree_root;
 259
 260         btrfs_init_path(&path);
 261 again:
 262         if (!extent_buffer_uptodate(tree_root_scan->node))
 263                 goto no_node;
 264
 265         key.offset = 0;
 266         key.objectid = 0;
 267         btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
 268         ret = btrfs_search_slot(NULL, tree_root_scan, &key, &path, 0, 0);
 269         BUG_ON(ret < 0);
 270         while(1) {
 271                 leaf = path.nodes[0];
 272                 slot = path.slots[0];
 273                 if (slot >= btrfs_header_nritems(leaf)) {
 274                         ret = btrfs_next_leaf(tree_root_scan, &path);
 275                         if (ret != 0)
 276                                 break;
 277                         leaf = path.nodes[0];
 278                         slot = path.slots[0];
 279                 }
 280                 btrfs_item_key(leaf, &disk_key, path.slots[0]);
 281                 btrfs_disk_key_to_cpu(&found_key, &disk_key);
 282                 if (btrfs_key_type(&found_key) == BTRFS_ROOT_ITEM_KEY) {
 283                         unsigned long offset;
 284                         struct extent_buffer *buf;
 285                         int skip = extent_only | device_only | uuid_tree_only;
 286
 287                         offset = btrfs_item_ptr_offset(leaf, slot);
 288                         read_extent_buffer(leaf, &ri, offset, sizeof(ri));
 289                         buf = read_tree_block(tree_root_scan,
 290                                               btrfs_root_bytenr(&ri),
 291                                               btrfs_level_size(tree_root_scan,
 292                                                         btrfs_root_level(&ri)),
 293                                               0);
 294                         if (!extent_buffer_uptodate(buf))
 295                                 goto next;
 296                         if (tree_id && found_key.objectid != tree_id) {
 297                                 free_extent_buffer(buf);
 298                                 goto next;
 299                         }
 300
 301                         switch(found_key.objectid) {
 302                         case BTRFS_ROOT_TREE_OBJECTID:
 303                                 if (!skip)
 304                                         printf("root");
 305                                 break;
 306                         case BTRFS_EXTENT_TREE_OBJECTID:
 307                                 if (!device_only && !uuid_tree_only)
 308                                         skip = 0;
 309                                 if (!skip)
 310                                         printf("extent");
 311                                 break;
 312                         case BTRFS_CHUNK_TREE_OBJECTID:
 313                                 if (!skip) {
 314                                         printf("chunk");
 315                                 }
 316                                 break;
 317                         case BTRFS_DEV_TREE_OBJECTID:
 318                                 if (!uuid_tree_only)
 319                                         skip = 0;
 320                                 if (!skip)
 321                                         printf("device");
 322                                 break;
 323                         case BTRFS_FS_TREE_OBJECTID:
 324                                 if (!skip) {
 325                                         printf("fs");
 326                                 }
 327                                 break;
 328                         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 329                                 skip = 0;
 330                                 printf("directory");
 331                                 break;
 332                         case BTRFS_CSUM_TREE_OBJECTID:
 333                                 if (!skip) {
 334                                         printf("checksum");
 335                                 }
 336                                 break;
 337                         case BTRFS_ORPHAN_OBJECTID:
 338                                 if (!skip) {
 339                                         printf("orphan");
 340                                 }
 341                                 break;
 342                         case BTRFS_TREE_LOG_OBJECTID:
 343                                 if (!skip) {
 344                                         printf("log");
 345                                 }
 346                                 break;
 347                         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 348                                 if (!skip) {
 349                                         printf("log fixup");
 350                                 }
 351                                 break;
 352                         case BTRFS_TREE_RELOC_OBJECTID:
 353                                 if (!skip) {
 354                                         printf("reloc");
 355                                 }
 356                                 break;
 357                         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 358                                 if (!skip) {
 359                                         printf("data reloc");
 360                                 }
 361                                 break;
 362                         case BTRFS_EXTENT_CSUM_OBJECTID:
 363                                 if (!skip) {
 364                                         printf("extent checksum");
 365                                 }
 366                                 break;
 367                         case BTRFS_QUOTA_TREE_OBJECTID:
 368                                 if (!skip) {
 369                                         printf("quota");
 370                                 }
 371                                 break;
 372                         case BTRFS_UUID_TREE_OBJECTID:
 373                                 if (!extent_only && !device_only)
 374                                         skip = 0;
 375                                 if (!skip)
 376                                         printf("uuid");
 377                                 break;
 378                         case BTRFS_MULTIPLE_OBJECTIDS:
 379                                 if (!skip) {
 380                                         printf("multiple");
 381                                 }
 382                                 break;
 383                         default:
 384                                 if (!skip) {
 385                                         printf("file");
 386                                 }
 387                         }
 388                         if (extent_only && !skip) {
 389                                 print_extents(tree_root_scan, buf);
 390                         } else if (!skip) {
 391                                 printf(" tree ");
 392                                 btrfs_print_key(&disk_key);
 393                                 if (roots_only) {
 394                                         printf(" %llu level %d\n",
 395                                                (unsigned long long)buf->start,
 396                                                btrfs_header_level(buf));
 397                                 } else {
 398                                         printf(" \n");
 399                                         btrfs_print_tree(tree_root_scan, buf, 1);
 400                                 }
 401                         }
 402                         free_extent_buffer(buf);
 403                 }
 404 next:
 405                 path.slots[0]++;
 406         }
 407 no_node:
 408         btrfs_release_path(&path);
 409
 410         if (tree_root_scan == info->tree_root &&
 411             info->log_root_tree) {
 412                 tree_root_scan = info->log_root_tree;
 413                 goto again;
 414         }
 415
 416         if (extent_only || device_only || uuid_tree_only)
 417                 goto close_root;
 418
 419         if (root_backups)
 420                 print_old_roots(info->super_copy);
 421
 422         printf("total bytes %llu\n",
 423                (unsigned long long)btrfs_super_total_bytes(info->super_copy));
 424         printf("bytes used %llu\n",
 425                (unsigned long long)btrfs_super_bytes_used(info->super_copy));
 426         uuidbuf[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 427         uuid_unparse(info->super_copy->fsid, uuidbuf);
 428         printf("uuid %s\n", uuidbuf);
 429         printf("%s\n", PACKAGE_STRING);
 430 close_root:
 431         return close_ctree(root);
 432 }