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 "volumes.h"
  32 #include "utils.h"
  33
  34 static int print_usage(int ret)
  35 {
  36         fprintf(stderr, "usage: btrfs-debug-tree [-e] [-d] [-r] [-R] [-u]\n");
  37         fprintf(stderr, "                        [-b block_num ] device\n");
  38         fprintf(stderr, "\t-e : print detailed extents info\n");
  39         fprintf(stderr, "\t-d : print info of btrfs device and root tree dirs"
  40                     " only\n");
  41         fprintf(stderr, "\t-r : print info of roots only\n");
  42         fprintf(stderr, "\t-R : print info of roots and root backups\n");
  43         fprintf(stderr, "\t-u : print info of uuid tree only\n");
  44         fprintf(stderr, "\t-b block_num : print info of the specified block"
  45                     " only\n");
  46         fprintf(stderr,
  47                 "\t-t tree_id : print only the tree with the given id\n");
  48         fprintf(stderr, "%s\n", PACKAGE_STRING);
  49         exit(ret);
  50 }
  51
  52 static void print_extents(struct btrfs_root *root, struct extent_buffer *eb)
  53 {
  54         int i;
  55         u32 nr;
  56         u32 size;
  57
  58         if (!eb)
  59                 return;
  60
  61         if (btrfs_is_leaf(eb)) {
  62                 btrfs_print_leaf(root, eb);
  63                 return;
  64         }
  65
  66         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
  67         nr = btrfs_header_nritems(eb);
  68         for (i = 0; i < nr; i++) {
  69                 struct extent_buffer *next = read_tree_block(root,
  70                                              btrfs_node_blockptr(eb, i),
  71                                              size,
  72                                              btrfs_node_ptr_generation(eb, i));
  73                 if (!extent_buffer_uptodate(next))
  74                         continue;
  75                 if (btrfs_is_leaf(next) &&
  76                     btrfs_header_level(eb) != 1)
  77                         BUG();
  78                 if (btrfs_header_level(next) !=
  79                         btrfs_header_level(eb) - 1)
  80                         BUG();
  81                 print_extents(root, next);
  82                 free_extent_buffer(next);
  83         }
  84 }
  85
  86 static void print_old_roots(struct btrfs_super_block *super)
  87 {
  88         struct btrfs_root_backup *backup;
  89         int i;
  90
  91         for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) {
  92                 backup = super->super_roots + i;
  93                 printf("btrfs root backup slot %d\n", i);
  94                 printf("\ttree root gen %llu block %llu\n",
  95                        (unsigned long long)btrfs_backup_tree_root_gen(backup),
  96                        (unsigned long long)btrfs_backup_tree_root(backup));
  97
  98                 printf("\t\textent root gen %llu block %llu\n",
  99                        (unsigned long long)btrfs_backup_extent_root_gen(backup),
 100                        (unsigned long long)btrfs_backup_extent_root(backup));
 101
 102                 printf("\t\tchunk root gen %llu block %llu\n",
 103                        (unsigned long long)btrfs_backup_chunk_root_gen(backup),
 104                        (unsigned long long)btrfs_backup_chunk_root(backup));
 105
 106                 printf("\t\tdevice root gen %llu block %llu\n",
 107                        (unsigned long long)btrfs_backup_dev_root_gen(backup),
 108                        (unsigned long long)btrfs_backup_dev_root(backup));
 109
 110                 printf("\t\tcsum root gen %llu block %llu\n",
 111                        (unsigned long long)btrfs_backup_csum_root_gen(backup),
 112                        (unsigned long long)btrfs_backup_csum_root(backup));
 113
 114                 printf("\t\tfs root gen %llu block %llu\n",
 115                        (unsigned long long)btrfs_backup_fs_root_gen(backup),
 116                        (unsigned long long)btrfs_backup_fs_root(backup));
 117
 118                 printf("\t\t%llu used %llu total %llu devices\n",
 119                        (unsigned long long)btrfs_backup_bytes_used(backup),
 120                        (unsigned long long)btrfs_backup_total_bytes(backup),
 121                        (unsigned long long)btrfs_backup_num_devices(backup));
 122         }
 123 }
 124
 125 int main(int ac, char **av)
 126 {
 127         struct btrfs_root *root;
 128         struct btrfs_fs_info *info;
 129         struct btrfs_path path;
 130         struct btrfs_key key;
 131         struct btrfs_root_item ri;
 132         struct extent_buffer *leaf;
 133         struct btrfs_disk_key disk_key;
 134         struct btrfs_key found_key;
 135         char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
 136         int ret;
 137         int slot;
 138         int extent_only = 0;
 139         int device_only = 0;
 140         int uuid_tree_only = 0;
 141         int roots_only = 0;
 142         int root_backups = 0;
 143         u64 block_only = 0;
 144         struct btrfs_root *tree_root_scan;
 145         u64 tree_id = 0;
 146
 147         radix_tree_init();
 148
 149         while(1) {
 150                 int c;
 151                 static const struct option long_options[] = {
 152                         { "help", no_argument, NULL, GETOPT_VAL_HELP},
 153                         { NULL, 0, NULL, 0 }
 154                 };
 155
 156                 c = getopt_long(ac, av, "deb:rRut:", long_options, NULL);
 157                 if (c < 0)
 158                         break;
 159                 switch(c) {
 160                         case 'e':
 161                                 extent_only = 1;
 162                                 break;
 163                         case 'd':
 164                                 device_only = 1;
 165                                 break;
 166                         case 'r':
 167                                 roots_only = 1;
 168                                 break;
 169                         case 'u':
 170                                 uuid_tree_only = 1;
 171                                 break;
 172                         case 'R':
 173                                 roots_only = 1;
 174                                 root_backups = 1;
 175                                 break;
 176                         case 'b':
 177                                 block_only = arg_strtou64(optarg);
 178                                 break;
 179                         case 't':
 180                                 tree_id = arg_strtou64(optarg);
 181                                 break;
 182                         case GETOPT_VAL_HELP:
 183                         default:
 184                                 print_usage(c != GETOPT_VAL_HELP);
 185                 }
 186         }
 187         set_argv0(av);
 188         ac = ac - optind;
 189         if (check_argc_exact(ac, 1))
 190                 print_usage(1);
 191
 192         ret = check_arg_type(av[optind]);
 193         if (ret != BTRFS_ARG_BLKDEV && ret != BTRFS_ARG_REG) {
 194                 fprintf(stderr, "'%s' is not a block device or regular file\n",
 195                         av[optind]);
 196                 exit(1);
 197         }
 198
 199         info = open_ctree_fs_info(av[optind], 0, 0, OPEN_CTREE_PARTIAL);
 200         if (!info) {
 201                 fprintf(stderr, "unable to open %s\n", av[optind]);
 202                 exit(1);
 203         }
 204
 205         root = info->fs_root;
 206         if (!root) {
 207                 fprintf(stderr, "unable to open %s\n", av[optind]);
 208                 exit(1);
 209         }
 210
 211         if (block_only) {
 212                 leaf = read_tree_block(root,
 213                                       block_only,
 214                                       root->leafsize, 0);
 215
 216                 if (extent_buffer_uptodate(leaf) &&
 217                     btrfs_header_level(leaf) != 0) {
 218                         free_extent_buffer(leaf);
 219                         leaf = NULL;
 220                 }
 221
 222                 if (!leaf) {
 223                         leaf = read_tree_block(root,
 224                                               block_only,
 225                                               root->nodesize, 0);
 226                 }
 227                 if (!extent_buffer_uptodate(leaf)) {
 228                         fprintf(stderr, "failed to read %llu\n",
 229                                 (unsigned long long)block_only);
 230                         goto close_root;
 231                 }
 232                 btrfs_print_tree(root, leaf, 0);
 233                 free_extent_buffer(leaf);
 234                 goto close_root;
 235         }
 236
 237         if (!(extent_only || uuid_tree_only || tree_id)) {
 238                 if (roots_only) {
 239                         printf("root tree: %llu level %d\n",
 240                              (unsigned long long)info->tree_root->node->start,
 241                              btrfs_header_level(info->tree_root->node));
 242                         printf("chunk tree: %llu level %d\n",
 243                              (unsigned long long)info->chunk_root->node->start,
 244                              btrfs_header_level(info->chunk_root->node));
 245                 } else {
 246                         if (info->tree_root->node) {
 247                                 printf("root tree\n");
 248                                 btrfs_print_tree(info->tree_root,
 249                                                  info->tree_root->node, 1);
 250                         }
 251
 252                         if (info->chunk_root->node) {
 253                                 printf("chunk tree\n");
 254                                 btrfs_print_tree(info->chunk_root,
 255                                                  info->chunk_root->node, 1);
 256                         }
 257                 }
 258         }
 259         tree_root_scan = info->tree_root;
 260
 261         btrfs_init_path(&path);
 262 again:
 263         if (!extent_buffer_uptodate(tree_root_scan->node))
 264                 goto no_node;
 265
 266         key.offset = 0;
 267         key.objectid = 0;
 268         btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
 269         ret = btrfs_search_slot(NULL, tree_root_scan, &key, &path, 0, 0);
 270         BUG_ON(ret < 0);
 271         while(1) {
 272                 leaf = path.nodes[0];
 273                 slot = path.slots[0];
 274                 if (slot >= btrfs_header_nritems(leaf)) {
 275                         ret = btrfs_next_leaf(tree_root_scan, &path);
 276                         if (ret != 0)
 277                                 break;
 278                         leaf = path.nodes[0];
 279                         slot = path.slots[0];
 280                 }
 281                 btrfs_item_key(leaf, &disk_key, path.slots[0]);
 282                 btrfs_disk_key_to_cpu(&found_key, &disk_key);
 283                 if (btrfs_key_type(&found_key) == BTRFS_ROOT_ITEM_KEY) {
 284                         unsigned long offset;
 285                         struct extent_buffer *buf;
 286                         int skip = extent_only | device_only | uuid_tree_only;
 287
 288                         offset = btrfs_item_ptr_offset(leaf, slot);
 289                         read_extent_buffer(leaf, &ri, offset, sizeof(ri));
 290                         buf = read_tree_block(tree_root_scan,
 291                                               btrfs_root_bytenr(&ri),
 292                                               btrfs_level_size(tree_root_scan,
 293                                                         btrfs_root_level(&ri)),
 294                                               0);
 295                         if (!extent_buffer_uptodate(buf))
 296                                 goto next;
 297                         if (tree_id && found_key.objectid != tree_id) {
 298                                 free_extent_buffer(buf);
 299                                 goto next;
 300                         }
 301
 302                         switch(found_key.objectid) {
 303                         case BTRFS_ROOT_TREE_OBJECTID:
 304                                 if (!skip)
 305                                         printf("root");
 306                                 break;
 307                         case BTRFS_EXTENT_TREE_OBJECTID:
 308                                 if (!device_only && !uuid_tree_only)
 309                                         skip = 0;
 310                                 if (!skip)
 311                                         printf("extent");
 312                                 break;
 313                         case BTRFS_CHUNK_TREE_OBJECTID:
 314                                 if (!skip) {
 315                                         printf("chunk");
 316                                 }
 317                                 break;
 318                         case BTRFS_DEV_TREE_OBJECTID:
 319                                 if (!uuid_tree_only)
 320                                         skip = 0;
 321                                 if (!skip)
 322                                         printf("device");
 323                                 break;
 324                         case BTRFS_FS_TREE_OBJECTID:
 325                                 if (!skip) {
 326                                         printf("fs");
 327                                 }
 328                                 break;
 329                         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 330                                 skip = 0;
 331                                 printf("directory");
 332                                 break;
 333                         case BTRFS_CSUM_TREE_OBJECTID:
 334                                 if (!skip) {
 335                                         printf("checksum");
 336                                 }
 337                                 break;
 338                         case BTRFS_ORPHAN_OBJECTID:
 339                                 if (!skip) {
 340                                         printf("orphan");
 341                                 }
 342                                 break;
 343                         case BTRFS_TREE_LOG_OBJECTID:
 344                                 if (!skip) {
 345                                         printf("log");
 346                                 }
 347                                 break;
 348                         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 349                                 if (!skip) {
 350                                         printf("log fixup");
 351                                 }
 352                                 break;
 353                         case BTRFS_TREE_RELOC_OBJECTID:
 354                                 if (!skip) {
 355                                         printf("reloc");
 356                                 }
 357                                 break;
 358                         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 359                                 if (!skip) {
 360                                         printf("data reloc");
 361                                 }
 362                                 break;
 363                         case BTRFS_EXTENT_CSUM_OBJECTID:
 364                                 if (!skip) {
 365                                         printf("extent checksum");
 366                                 }
 367                                 break;
 368                         case BTRFS_QUOTA_TREE_OBJECTID:
 369                                 if (!skip) {
 370                                         printf("quota");
 371                                 }
 372                                 break;
 373                         case BTRFS_UUID_TREE_OBJECTID:
 374                                 if (!extent_only && !device_only)
 375                                         skip = 0;
 376                                 if (!skip)
 377                                         printf("uuid");
 378                                 break;
 379                         case BTRFS_FREE_SPACE_TREE_OBJECTID:
 380                                 if (!skip)
 381                                         printf("free space");
 382                                 break;
 383                         case BTRFS_MULTIPLE_OBJECTIDS:
 384                                 if (!skip) {
 385                                         printf("multiple");
 386                                 }
 387                                 break;
 388                         default:
 389                                 if (!skip) {
 390                                         printf("file");
 391                                 }
 392                         }
 393                         if (extent_only && !skip) {
 394                                 print_extents(tree_root_scan, buf);
 395                         } else if (!skip) {
 396                                 printf(" tree ");
 397                                 btrfs_print_key(&disk_key);
 398                                 if (roots_only) {
 399                                         printf(" %llu level %d\n",
 400                                                (unsigned long long)buf->start,
 401                                                btrfs_header_level(buf));
 402                                 } else {
 403                                         printf(" \n");
 404                                         btrfs_print_tree(tree_root_scan, buf, 1);
 405                                 }
 406                         }
 407                         free_extent_buffer(buf);
 408                 }
 409 next:
 410                 path.slots[0]++;
 411         }
 412 no_node:
 413         btrfs_release_path(&path);
 414
 415         if (tree_root_scan == info->tree_root &&
 416             info->log_root_tree) {
 417                 tree_root_scan = info->log_root_tree;
 418                 goto again;
 419         }
 420
 421         if (extent_only || device_only || uuid_tree_only)
 422                 goto close_root;
 423
 424         if (root_backups)
 425                 print_old_roots(info->super_copy);
 426
 427         printf("total bytes %llu\n",
 428                (unsigned long long)btrfs_super_total_bytes(info->super_copy));
 429         printf("bytes used %llu\n",
 430                (unsigned long long)btrfs_super_bytes_used(info->super_copy));
 431         uuidbuf[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 432         uuid_unparse(info->super_copy->fsid, uuidbuf);
 433         printf("uuid %s\n", uuidbuf);
 434         printf("%s\n", PACKAGE_STRING);
 435 close_root:
 436         ret = close_ctree(root);
 437         btrfs_close_all_devices();
 438         return ret;
 439 }