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 = atoll(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         root = info->fs_root;
 181
 182         if (block_only) {
 183                 if (!root) {
 184                         fprintf(stderr, "unable to open %s\n", av[optind]);
 185                         exit(1);
 186                 }
 187                 leaf = read_tree_block(root,
 188                                       block_only,
 189                                       root->leafsize, 0);
 190
 191                 if (leaf && btrfs_header_level(leaf) != 0) {
 192                         free_extent_buffer(leaf);
 193                         leaf = NULL;
 194                 }
 195
 196                 if (!leaf) {
 197                         leaf = read_tree_block(root,
 198                                               block_only,
 199                                               root->nodesize, 0);
 200                 }
 201                 if (!leaf) {
 202                         fprintf(stderr, "failed to read %llu\n",
 203                                 (unsigned long long)block_only);
 204                         goto close_root;
 205                 }
 206                 btrfs_print_tree(root, leaf, 0);
 207                 goto close_root;
 208         }
 209
 210         if (!(extent_only || uuid_tree_only)) {
 211                 if (roots_only) {
 212                         printf("root tree: %llu level %d\n",
 213                              (unsigned long long)info->tree_root->node->start,
 214                              btrfs_header_level(info->tree_root->node));
 215                         printf("chunk tree: %llu level %d\n",
 216                              (unsigned long long)info->chunk_root->node->start,
 217                              btrfs_header_level(info->chunk_root->node));
 218                 } else {
 219                         if (info->tree_root->node) {
 220                                 printf("root tree\n");
 221                                 btrfs_print_tree(info->tree_root,
 222                                                  info->tree_root->node, 1);
 223                         }
 224
 225                         if (info->chunk_root->node) {
 226                                 printf("chunk tree\n");
 227                                 btrfs_print_tree(info->chunk_root,
 228                                                  info->chunk_root->node, 1);
 229                         }
 230                 }
 231         }
 232         tree_root_scan = info->tree_root;
 233
 234         btrfs_init_path(&path);
 235 again:
 236         if (!extent_buffer_uptodate(tree_root_scan->node))
 237                 goto no_node;
 238
 239         key.offset = 0;
 240         key.objectid = 0;
 241         btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
 242         ret = btrfs_search_slot(NULL, tree_root_scan, &key, &path, 0, 0);
 243         BUG_ON(ret < 0);
 244         while(1) {
 245                 leaf = path.nodes[0];
 246                 slot = path.slots[0];
 247                 if (slot >= btrfs_header_nritems(leaf)) {
 248                         ret = btrfs_next_leaf(tree_root_scan, &path);
 249                         if (ret != 0)
 250                                 break;
 251                         leaf = path.nodes[0];
 252                         slot = path.slots[0];
 253                 }
 254                 btrfs_item_key(leaf, &disk_key, path.slots[0]);
 255                 btrfs_disk_key_to_cpu(&found_key, &disk_key);
 256                 if (btrfs_key_type(&found_key) == BTRFS_ROOT_ITEM_KEY) {
 257                         unsigned long offset;
 258                         struct extent_buffer *buf;
 259                         int skip = extent_only | device_only | uuid_tree_only;
 260
 261                         offset = btrfs_item_ptr_offset(leaf, slot);
 262                         read_extent_buffer(leaf, &ri, offset, sizeof(ri));
 263                         buf = read_tree_block(tree_root_scan,
 264                                               btrfs_root_bytenr(&ri),
 265                                               btrfs_level_size(tree_root_scan,
 266                                                         btrfs_root_level(&ri)),
 267                                               0);
 268                         if (!extent_buffer_uptodate(buf))
 269                                 goto next;
 270
 271                         switch(found_key.objectid) {
 272                         case BTRFS_ROOT_TREE_OBJECTID:
 273                                 if (!skip)
 274                                         printf("root");
 275                                 break;
 276                         case BTRFS_EXTENT_TREE_OBJECTID:
 277                                 if (!device_only && !uuid_tree_only)
 278                                         skip = 0;
 279                                 if (!skip)
 280                                         printf("extent");
 281                                 break;
 282                         case BTRFS_CHUNK_TREE_OBJECTID:
 283                                 if (!skip) {
 284                                         printf("chunk");
 285                                 }
 286                                 break;
 287                         case BTRFS_DEV_TREE_OBJECTID:
 288                                 if (!uuid_tree_only)
 289                                         skip = 0;
 290                                 if (!skip)
 291                                         printf("device");
 292                                 break;
 293                         case BTRFS_FS_TREE_OBJECTID:
 294                                 if (!skip) {
 295                                         printf("fs");
 296                                 }
 297                                 break;
 298                         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 299                                 skip = 0;
 300                                 printf("directory");
 301                                 break;
 302                         case BTRFS_CSUM_TREE_OBJECTID:
 303                                 if (!skip) {
 304                                         printf("checksum");
 305                                 }
 306                                 break;
 307                         case BTRFS_ORPHAN_OBJECTID:
 308                                 if (!skip) {
 309                                         printf("orphan");
 310                                 }
 311                                 break;
 312                         case BTRFS_TREE_LOG_OBJECTID:
 313                                 if (!skip) {
 314                                         printf("log");
 315                                 }
 316                                 break;
 317                         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 318                                 if (!skip) {
 319                                         printf("log fixup");
 320                                 }
 321                                 break;
 322                         case BTRFS_TREE_RELOC_OBJECTID:
 323                                 if (!skip) {
 324                                         printf("reloc");
 325                                 }
 326                                 break;
 327                         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 328                                 if (!skip) {
 329                                         printf("data reloc");
 330                                 }
 331                                 break;
 332                         case BTRFS_EXTENT_CSUM_OBJECTID:
 333                                 if (!skip) {
 334                                         printf("extent checksum");
 335                                 }
 336                                 break;
 337                         case BTRFS_QUOTA_TREE_OBJECTID:
 338                                 if (!skip) {
 339                                         printf("quota");
 340                                 }
 341                                 break;
 342                         case BTRFS_UUID_TREE_OBJECTID:
 343                                 if (!extent_only && !device_only)
 344                                         skip = 0;
 345                                 if (!skip)
 346                                         printf("uuid");
 347                                 break;
 348                         case BTRFS_MULTIPLE_OBJECTIDS:
 349                                 if (!skip) {
 350                                         printf("multiple");
 351                                 }
 352                                 break;
 353                         default:
 354                                 if (!skip) {
 355                                         printf("file");
 356                                 }
 357                         }
 358                         if (extent_only && !skip) {
 359                                 print_extents(tree_root_scan, buf);
 360                         } else if (!skip) {
 361                                 printf(" tree ");
 362                                 btrfs_print_key(&disk_key);
 363                                 if (roots_only) {
 364                                         printf(" %llu level %d\n",
 365                                                (unsigned long long)buf->start,
 366                                                btrfs_header_level(buf));
 367                                 } else {
 368                                         printf(" \n");
 369                                         btrfs_print_tree(tree_root_scan, buf, 1);
 370                                 }
 371                         }
 372                         free_extent_buffer(buf);
 373                 }
 374 next:
 375                 path.slots[0]++;
 376         }
 377 no_node:
 378         btrfs_release_path(&path);
 379
 380         if (tree_root_scan == info->tree_root &&
 381             info->log_root_tree) {
 382                 tree_root_scan = info->log_root_tree;
 383                 goto again;
 384         }
 385
 386         if (extent_only || device_only || uuid_tree_only)
 387                 goto close_root;
 388
 389         if (root_backups)
 390                 print_old_roots(info->super_copy);
 391
 392         printf("total bytes %llu\n",
 393                (unsigned long long)btrfs_super_total_bytes(info->super_copy));
 394         printf("bytes used %llu\n",
 395                (unsigned long long)btrfs_super_bytes_used(info->super_copy));
 396         uuidbuf[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 397         uuid_unparse(info->super_copy->fsid, uuidbuf);
 398         printf("uuid %s\n", uuidbuf);
 399         printf("%s\n", BTRFS_BUILD_VERSION);
 400 close_root:
 401         return close_ctree(root);
 402 }