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