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