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