cmds-inspect-dump-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 "commands.h"
  33 #include "utils.h"
  34 #include "cmds-inspect-dump-tree.h"
  35 #include "help.h"
  36
  37 static void print_extents(struct btrfs_root *root, struct extent_buffer *eb)
  38 {
  39         struct extent_buffer *next;
  40         int i;
  41         u32 nr;
  42         u32 size;
  43
  44         if (!eb)
  45                 return;
  46
  47         if (btrfs_is_leaf(eb)) {
  48                 btrfs_print_leaf(root, eb);
  49                 return;
  50         }
  51
  52         size = root->nodesize;
  53         nr = btrfs_header_nritems(eb);
  54         for (i = 0; i < nr; i++) {
  55                 next = read_tree_block(root, btrfs_node_blockptr(eb, i),
  56                                 size, btrfs_node_ptr_generation(eb, i));
  57                 if (!extent_buffer_uptodate(next))
  58                         continue;
  59                 if (btrfs_is_leaf(next) && btrfs_header_level(eb) != 1) {
  60                         warning(
  61         "eb corrupted: item %d eb level %d next level %d, skipping the rest",
  62                                 i, btrfs_header_level(next),
  63                                 btrfs_header_level(eb));
  64                         goto out;
  65                 }
  66                 if (btrfs_header_level(next) != btrfs_header_level(eb) - 1) {
  67                         warning(
  68         "eb corrupted: item %d eb level %d next level %d, skipping the rest",
  69                                 i, btrfs_header_level(next),
  70                                 btrfs_header_level(eb));
  71                         goto out;
  72                 }
  73                 print_extents(root, next);
  74                 free_extent_buffer(next);
  75         }
  76
  77         return;
  78
  79 out:
  80         free_extent_buffer(next);
  81 }
  82
  83 static void print_old_roots(struct btrfs_super_block *super)
  84 {
  85         struct btrfs_root_backup *backup;
  86         int i;
  87
  88         for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) {
  89                 backup = super->super_roots + i;
  90                 printf("btrfs root backup slot %d\n", i);
  91                 printf("\ttree root gen %llu block %llu\n",
  92                        (unsigned long long)btrfs_backup_tree_root_gen(backup),
  93                        (unsigned long long)btrfs_backup_tree_root(backup));
  94
  95                 printf("\t\textent root gen %llu block %llu\n",
  96                        (unsigned long long)btrfs_backup_extent_root_gen(backup),
  97                        (unsigned long long)btrfs_backup_extent_root(backup));
  98
  99                 printf("\t\tchunk root gen %llu block %llu\n",
 100                        (unsigned long long)btrfs_backup_chunk_root_gen(backup),
 101                        (unsigned long long)btrfs_backup_chunk_root(backup));
 102
 103                 printf("\t\tdevice root gen %llu block %llu\n",
 104                        (unsigned long long)btrfs_backup_dev_root_gen(backup),
 105                        (unsigned long long)btrfs_backup_dev_root(backup));
 106
 107                 printf("\t\tcsum root gen %llu block %llu\n",
 108                        (unsigned long long)btrfs_backup_csum_root_gen(backup),
 109                        (unsigned long long)btrfs_backup_csum_root(backup));
 110
 111                 printf("\t\tfs root gen %llu block %llu\n",
 112                        (unsigned long long)btrfs_backup_fs_root_gen(backup),
 113                        (unsigned long long)btrfs_backup_fs_root(backup));
 114
 115                 printf("\t\t%llu used %llu total %llu devices\n",
 116                        (unsigned long long)btrfs_backup_bytes_used(backup),
 117                        (unsigned long long)btrfs_backup_total_bytes(backup),
 118                        (unsigned long long)btrfs_backup_num_devices(backup));
 119         }
 120 }
 121
 122 /*
 123  * Convert a tree name from various forms to the numerical id if possible
 124  * Accepted forms:
 125  * - case does not matter
 126  * - same as the key name, BTRFS_ROOT_TREE_OBJECTID
 127  * - dtto shortened, BTRFS_ROOT_TREE
 128  * - dtto without prefix, ROOT_TREE
 129  * - common name, ROOT, CHUNK, EXTENT, ...
 130  * - dtto alias, DEVICE for DEV, CHECKSUM for CSUM
 131  *
 132  * Returns 0 if the tree id was not recognized.
 133  */
 134 static u64 treeid_from_string(const char *str, const char **end)
 135 {
 136         int match = 0;
 137         int i;
 138         u64 id;
 139         static struct treename {
 140                 const char *name;
 141                 u64 id;
 142         } tn[] = {
 143                 { "ROOT", BTRFS_ROOT_TREE_OBJECTID },
 144                 { "EXTENT", BTRFS_EXTENT_TREE_OBJECTID },
 145                 { "CHUNK", BTRFS_CHUNK_TREE_OBJECTID },
 146                 { "DEVICE", BTRFS_DEV_TREE_OBJECTID },
 147                 { "DEV", BTRFS_DEV_TREE_OBJECTID },
 148                 { "FS_TREE", BTRFS_FS_TREE_OBJECTID },
 149                 { "CSUM", BTRFS_CSUM_TREE_OBJECTID },
 150                 { "CHECKSUM", BTRFS_CSUM_TREE_OBJECTID },
 151                 { "QUOTA", BTRFS_QUOTA_TREE_OBJECTID },
 152                 { "UUID", BTRFS_UUID_TREE_OBJECTID },
 153                 { "FREE_SPACE", BTRFS_FREE_SPACE_TREE_OBJECTID },
 154                 { "TREE_LOG_FIXUP", BTRFS_TREE_LOG_FIXUP_OBJECTID },
 155                 { "TREE_LOG", BTRFS_TREE_LOG_OBJECTID },
 156                 { "TREE_RELOC", BTRFS_TREE_RELOC_OBJECTID },
 157                 { "DATA_RELOC", BTRFS_DATA_RELOC_TREE_OBJECTID }
 158         };
 159
 160         if (strncasecmp("BTRFS_", str, strlen("BTRFS_")) == 0)
 161                 str += strlen("BTRFS_");
 162
 163         for (i = 0; i < ARRAY_SIZE(tn); i++) {
 164                 int len = strlen(tn[i].name);
 165
 166                 if (strncasecmp(tn[i].name, str, len) == 0) {
 167                         id = tn[i].id;
 168                         match = 1;
 169                         str += len;
 170                         break;
 171                 }
 172         }
 173
 174         if (!match)
 175                 return 0;
 176
 177         if (strncasecmp("_TREE", str, strlen("_TREE")) == 0)
 178                 str += strlen("_TREE");
 179
 180         if (strncasecmp("_OBJECTID", str, strlen("_OBJECTID")) == 0)
 181                 str += strlen("_OBJECTID");
 182
 183         *end = str;
 184
 185         return id;
 186 }
 187
 188 const char * const cmd_inspect_dump_tree_usage[] = {
 189         "btrfs inspect-internal dump-tree [options] device",
 190         "Dump tree structures from a given device",
 191         "Dump tree structures from a given device in textual form, expand keys to human",
 192         "readable equivalents where possible.",
 193         "Note: contains file names, consider that if you're asked to send the dump",
 194         "for analysis.",
 195         "",
 196         "-e|--extents           print only extent info: extent and device trees",
 197         "-d|--device            print only device info: tree root, chunk and device trees",
 198         "-r|--roots             print only short root node info",
 199         "-R|--backups           same as --roots plus print backup root info",
 200         "-u|--uuid              print only the uuid tree",
 201         "-b|--block <block_num> print info from the specified block only",
 202         "-t|--tree <tree_id>    print only tree with the given id (string or number)",
 203         NULL
 204 };
 205
 206 int cmd_inspect_dump_tree(int argc, char **argv)
 207 {
 208         struct btrfs_root *root;
 209         struct btrfs_fs_info *info;
 210         struct btrfs_path path;
 211         struct btrfs_key key;
 212         struct btrfs_root_item ri;
 213         struct extent_buffer *leaf;
 214         struct btrfs_disk_key disk_key;
 215         struct btrfs_key found_key;
 216         char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
 217         int ret;
 218         int slot;
 219         int extent_only = 0;
 220         int device_only = 0;
 221         int uuid_tree_only = 0;
 222         int roots_only = 0;
 223         int root_backups = 0;
 224         u64 block_only = 0;
 225         struct btrfs_root *tree_root_scan;
 226         u64 tree_id = 0;
 227
 228         while (1) {
 229                 int c;
 230                 static const struct option long_options[] = {
 231                         { "extents", no_argument, NULL, 'e'},
 232                         { "device", no_argument, NULL, 'd'},
 233                         { "roots", no_argument, NULL, 'r'},
 234                         { "backups", no_argument, NULL, 'R'},
 235                         { "uuid", no_argument, NULL, 'u'},
 236                         { "block", required_argument, NULL, 'b'},
 237                         { "tree", required_argument, NULL, 't'},
 238                         { NULL, 0, NULL, 0 }
 239                 };
 240
 241                 c = getopt_long(argc, argv, "deb:rRut:", long_options, NULL);
 242                 if (c < 0)
 243                         break;
 244                 switch (c) {
 245                 case 'e':
 246                         extent_only = 1;
 247                         break;
 248                 case 'd':
 249                         device_only = 1;
 250                         break;
 251                 case 'r':
 252                         roots_only = 1;
 253                         break;
 254                 case 'u':
 255                         uuid_tree_only = 1;
 256                         break;
 257                 case 'R':
 258                         roots_only = 1;
 259                         root_backups = 1;
 260                         break;
 261                 case 'b':
 262                         block_only = arg_strtou64(optarg);
 263                         break;
 264                 case 't': {
 265                         const char *end = NULL;
 266
 267                         if (string_is_numerical(optarg))
 268                                 tree_id = arg_strtou64(optarg);
 269                         else
 270                                 tree_id = treeid_from_string(optarg, &end);
 271
 272                         if (!tree_id) {
 273                                 error("unrecognized tree id: %s",
 274                                                 optarg);
 275                                 exit(1);
 276                         }
 277
 278                         if (end && *end) {
 279                                 error("unexpected tree id suffix of '%s': %s",
 280                                                 optarg, end);
 281                                 exit(1);
 282                         }
 283                         break;
 284                         }
 285                 default:
 286                         usage(cmd_inspect_dump_tree_usage);
 287                 }
 288         }
 289
 290         if (check_argc_exact(argc - optind, 1))
 291                 usage(cmd_inspect_dump_tree_usage);
 292
 293         ret = check_arg_type(argv[optind]);
 294         if (ret != BTRFS_ARG_BLKDEV && ret != BTRFS_ARG_REG) {
 295                 error("not a block device or regular file: %s", argv[optind]);
 296                 goto out;
 297         }
 298
 299         printf("%s\n", PACKAGE_STRING);
 300
 301         info = open_ctree_fs_info(argv[optind], 0, 0, 0, OPEN_CTREE_PARTIAL);
 302         if (!info) {
 303                 error("unable to open %s", argv[optind]);
 304                 goto out;
 305         }
 306
 307         root = info->fs_root;
 308         if (!root) {
 309                 error("unable to open %s", argv[optind]);
 310                 goto out;
 311         }
 312
 313         if (block_only) {
 314                 leaf = read_tree_block(root,
 315                                       block_only,
 316                                       root->nodesize, 0);
 317
 318                 if (extent_buffer_uptodate(leaf) &&
 319                     btrfs_header_level(leaf) != 0) {
 320                         free_extent_buffer(leaf);
 321                         leaf = NULL;
 322                 }
 323
 324                 if (!leaf) {
 325                         leaf = read_tree_block(root,
 326                                               block_only,
 327                                               root->nodesize, 0);
 328                 }
 329                 if (!extent_buffer_uptodate(leaf)) {
 330                         error("failed to read %llu",
 331                                 (unsigned long long)block_only);
 332                         goto close_root;
 333                 }
 334                 btrfs_print_tree(root, leaf, 0);
 335                 free_extent_buffer(leaf);
 336                 goto close_root;
 337         }
 338
 339         if (!(extent_only || uuid_tree_only || tree_id)) {
 340                 if (roots_only) {
 341                         printf("root tree: %llu level %d\n",
 342                              (unsigned long long)info->tree_root->node->start,
 343                              btrfs_header_level(info->tree_root->node));
 344                         printf("chunk tree: %llu level %d\n",
 345                              (unsigned long long)info->chunk_root->node->start,
 346                              btrfs_header_level(info->chunk_root->node));
 347                 } else {
 348                         if (info->tree_root->node) {
 349                                 printf("root tree\n");
 350                                 btrfs_print_tree(info->tree_root,
 351                                                  info->tree_root->node, 1);
 352                         }
 353
 354                         if (info->chunk_root->node) {
 355                                 printf("chunk tree\n");
 356                                 btrfs_print_tree(info->chunk_root,
 357                                                  info->chunk_root->node, 1);
 358                         }
 359                 }
 360         }
 361         tree_root_scan = info->tree_root;
 362
 363         btrfs_init_path(&path);
 364 again:
 365         if (!extent_buffer_uptodate(tree_root_scan->node))
 366                 goto no_node;
 367
 368         /*
 369          * Tree's that are not pointed by the tree of tree roots
 370          */
 371         if (tree_id && tree_id == BTRFS_ROOT_TREE_OBJECTID) {
 372                 if (!info->tree_root->node) {
 373                         error("cannot print root tree, invalid pointer");
 374                         goto close_root;
 375                 }
 376                 printf("root tree\n");
 377                 btrfs_print_tree(info->tree_root, info->tree_root->node, 1);
 378                 goto close_root;
 379         }
 380
 381         if (tree_id && tree_id == BTRFS_CHUNK_TREE_OBJECTID) {
 382                 if (!info->chunk_root->node) {
 383                         error("cannot print chunk tree, invalid pointer");
 384                         goto close_root;
 385                 }
 386                 printf("chunk tree\n");
 387                 btrfs_print_tree(info->chunk_root, info->chunk_root->node, 1);
 388                 goto close_root;
 389         }
 390
 391         key.offset = 0;
 392         key.objectid = 0;
 393         key.type = BTRFS_ROOT_ITEM_KEY;
 394         ret = btrfs_search_slot(NULL, tree_root_scan, &key, &path, 0, 0);
 395         if (ret < 0) {
 396                 error("cannot read ROOT_ITEM from tree %llu: %s",
 397                         (unsigned long long)tree_root_scan->root_key.objectid,
 398                         strerror(-ret));
 399                 goto close_root;
 400         }
 401         while (1) {
 402                 leaf = path.nodes[0];
 403                 slot = path.slots[0];
 404                 if (slot >= btrfs_header_nritems(leaf)) {
 405                         ret = btrfs_next_leaf(tree_root_scan, &path);
 406                         if (ret != 0)
 407                                 break;
 408                         leaf = path.nodes[0];
 409                         slot = path.slots[0];
 410                 }
 411                 btrfs_item_key(leaf, &disk_key, path.slots[0]);
 412                 btrfs_disk_key_to_cpu(&found_key, &disk_key);
 413                 if (found_key.type == BTRFS_ROOT_ITEM_KEY) {
 414                         unsigned long offset;
 415                         struct extent_buffer *buf;
 416                         int skip = extent_only | device_only | uuid_tree_only;
 417
 418                         offset = btrfs_item_ptr_offset(leaf, slot);
 419                         read_extent_buffer(leaf, &ri, offset, sizeof(ri));
 420                         buf = read_tree_block(tree_root_scan,
 421                                               btrfs_root_bytenr(&ri),
 422                                               tree_root_scan->nodesize,
 423                                               0);
 424                         if (!extent_buffer_uptodate(buf))
 425                                 goto next;
 426                         if (tree_id && found_key.objectid != tree_id) {
 427                                 free_extent_buffer(buf);
 428                                 goto next;
 429                         }
 430
 431                         switch (found_key.objectid) {
 432                         case BTRFS_ROOT_TREE_OBJECTID:
 433                                 if (!skip)
 434                                         printf("root");
 435                                 break;
 436                         case BTRFS_EXTENT_TREE_OBJECTID:
 437                                 if (!device_only && !uuid_tree_only)
 438                                         skip = 0;
 439                                 if (!skip)
 440                                         printf("extent");
 441                                 break;
 442                         case BTRFS_CHUNK_TREE_OBJECTID:
 443                                 if (!skip) {
 444                                         printf("chunk");
 445                                 }
 446                                 break;
 447                         case BTRFS_DEV_TREE_OBJECTID:
 448                                 if (!uuid_tree_only)
 449                                         skip = 0;
 450                                 if (!skip)
 451                                         printf("device");
 452                                 break;
 453                         case BTRFS_FS_TREE_OBJECTID:
 454                                 if (!skip) {
 455                                         printf("fs");
 456                                 }
 457                                 break;
 458                         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 459                                 skip = 0;
 460                                 printf("directory");
 461                                 break;
 462                         case BTRFS_CSUM_TREE_OBJECTID:
 463                                 if (!skip) {
 464                                         printf("checksum");
 465                                 }
 466                                 break;
 467                         case BTRFS_ORPHAN_OBJECTID:
 468                                 if (!skip) {
 469                                         printf("orphan");
 470                                 }
 471                                 break;
 472                         case BTRFS_TREE_LOG_OBJECTID:
 473                                 if (!skip) {
 474                                         printf("log");
 475                                 }
 476                                 break;
 477                         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 478                                 if (!skip) {
 479                                         printf("log fixup");
 480                                 }
 481                                 break;
 482                         case BTRFS_TREE_RELOC_OBJECTID:
 483                                 if (!skip) {
 484                                         printf("reloc");
 485                                 }
 486                                 break;
 487                         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 488                                 if (!skip) {
 489                                         printf("data reloc");
 490                                 }
 491                                 break;
 492                         case BTRFS_EXTENT_CSUM_OBJECTID:
 493                                 if (!skip) {
 494                                         printf("extent checksum");
 495                                 }
 496                                 break;
 497                         case BTRFS_QUOTA_TREE_OBJECTID:
 498                                 if (!skip) {
 499                                         printf("quota");
 500                                 }
 501                                 break;
 502                         case BTRFS_UUID_TREE_OBJECTID:
 503                                 if (!extent_only && !device_only)
 504                                         skip = 0;
 505                                 if (!skip)
 506                                         printf("uuid");
 507                                 break;
 508                         case BTRFS_FREE_SPACE_TREE_OBJECTID:
 509                                 if (!skip)
 510                                         printf("free space");
 511                                 break;
 512                         case BTRFS_MULTIPLE_OBJECTIDS:
 513                                 if (!skip) {
 514                                         printf("multiple");
 515                                 }
 516                                 break;
 517                         default:
 518                                 if (!skip) {
 519                                         printf("file");
 520                                 }
 521                         }
 522                         if (extent_only && !skip) {
 523                                 printf(" tree ");
 524                                 btrfs_print_key(&disk_key);
 525                                 printf("\n");
 526                                 print_extents(tree_root_scan, buf);
 527                         } else if (!skip) {
 528                                 printf(" tree ");
 529                                 btrfs_print_key(&disk_key);
 530                                 if (roots_only) {
 531                                         printf(" %llu level %d\n",
 532                                                (unsigned long long)buf->start,
 533                                                btrfs_header_level(buf));
 534                                 } else {
 535                                         printf(" \n");
 536                                         btrfs_print_tree(tree_root_scan, buf, 1);
 537                                 }
 538                         }
 539                         free_extent_buffer(buf);
 540                 }
 541 next:
 542                 path.slots[0]++;
 543         }
 544 no_node:
 545         btrfs_release_path(&path);
 546
 547         if (tree_root_scan == info->tree_root && info->log_root_tree) {
 548                 tree_root_scan = info->log_root_tree;
 549                 goto again;
 550         }
 551
 552         if (extent_only || device_only || uuid_tree_only)
 553                 goto close_root;
 554
 555         if (root_backups)
 556                 print_old_roots(info->super_copy);
 557
 558         printf("total bytes %llu\n",
 559                (unsigned long long)btrfs_super_total_bytes(info->super_copy));
 560         printf("bytes used %llu\n",
 561                (unsigned long long)btrfs_super_bytes_used(info->super_copy));
 562         uuidbuf[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 563         uuid_unparse(info->super_copy->fsid, uuidbuf);
 564         printf("uuid %s\n", uuidbuf);
 565 close_root:
 566         ret = close_ctree(root);
 567 out:
 568         return !!ret;
 569 }