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