btrfs-corrupt-block.c

   1 /*
   2  * Copyright (C) 2009 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 <fcntl.h>
  22 #include <unistd.h>
  23 #include <getopt.h>
  24 #include <limits.h>
  25
  26 #include "kerncompat.h"
  27 #include "ctree.h"
  28 #include "volumes.h"
  29 #include "disk-io.h"
  30 #include "print-tree.h"
  31 #include "transaction.h"
  32 #include "list.h"
  33 #include "utils.h"
  34 #include "help.h"
  35
  36 #define FIELD_BUF_LEN 80
  37
  38 static int debug_corrupt_block(struct extent_buffer *eb,
  39                 struct btrfs_root *root, u64 bytenr, u32 blocksize, u64 copy)
  40 {
  41         int ret;
  42         u64 length;
  43         struct btrfs_multi_bio *multi = NULL;
  44         struct btrfs_device *device;
  45         int num_copies;
  46         int mirror_num = 1;
  47
  48         length = blocksize;
  49         while (1) {
  50                 ret = btrfs_map_block(root->fs_info, READ, eb->start, &length,
  51                                       &multi, mirror_num, NULL);
  52                 if (ret) {
  53                         error("cannot map block %llu length %llu mirror %d: %d",
  54                                         (unsigned long long)eb->start,
  55                                         (unsigned long long)length,
  56                                         mirror_num, ret);
  57                         return ret;
  58                 }
  59                 device = multi->stripes[0].dev;
  60                 eb->fd = device->fd;
  61                 device->total_ios++;
  62                 eb->dev_bytenr = multi->stripes[0].physical;
  63
  64                 fprintf(stdout,
  65                         "mirror %d logical %llu physical %llu device %s\n",
  66                         mirror_num, (unsigned long long)bytenr,
  67                         (unsigned long long)eb->dev_bytenr, device->name);
  68                 free(multi);
  69
  70                 if (!copy || mirror_num == copy) {
  71                         ret = read_extent_from_disk(eb, 0, eb->len);
  72                         if (ret < 0) {
  73                                 error("cannot read eb bytenr %llu: %s",
  74                                                 (unsigned long long)eb->dev_bytenr,
  75                                                 strerror(-ret));
  76                                 return ret;
  77                         }
  78                         printf("corrupting %llu copy %d\n", eb->start,
  79                                mirror_num);
  80                         memset(eb->data, 0, eb->len);
  81                         ret = write_extent_to_disk(eb);
  82                         if (ret < 0) {
  83                                 error("cannot write eb bytenr %llu: %s",
  84                                                 (unsigned long long)eb->dev_bytenr,
  85                                                 strerror(-ret));
  86                                 return ret;
  87                         }
  88                         fsync(eb->fd);
  89                 }
  90
  91                 num_copies = btrfs_num_copies(root->fs_info, eb->start,
  92                                               eb->len);
  93                 if (num_copies == 1)
  94                         break;
  95
  96                 mirror_num++;
  97                 if (mirror_num > num_copies)
  98                         break;
  99         }
 100
 101         return 0;
 102 }
 103
 104 static void print_usage(int ret)
 105 {
 106         printf("usage: btrfs-corrupt-block [options] device\n");
 107         printf("\t-l   Logical extent to be corrupted\n");
 108         printf("\t-c   Copy of the extent to be corrupted (usually 1 or 2, default: 0)\n");
 109         printf("\t-b   Number of bytes to be corrupted\n");
 110         printf("\t-e   Extent to be corrupted\n");
 111         printf("\t-E   The whole extent tree to be corrupted\n");
 112         printf("\t-u   Given chunk item to be corrupted\n");
 113         printf("\t-U   The whole chunk tree to be corrupted\n");
 114         printf("\t-i   The inode item to corrupt (must also specify the field to corrupt)\n");
 115         printf("\t-x   The file extent item to corrupt (must also specify -i for the inode and -f for the field to corrupt)\n");
 116         printf("\t-m   The metadata block to corrupt (must also specify -f for the field to corrupt)\n");
 117         printf("\t-K <u64,u8,u64> Corrupt the given key (must also specify -f for the field and optionally -r for the root)\n");
 118         printf("\t-f   The field in the item to corrupt\n");
 119         printf("\t-I <u64,u8,u64> Corrupt an item corresponding to the passed key triplet (must also specify the field to corrupt and root for the item)\n");
 120         printf("\t-D <u64,u8,u64> Corrupt a dir item corresponding to the passed key triplet, must also specify a field\n");
 121         printf("\t-d <u64,u8,u64> Delete item corresponding to passed key triplet\n");
 122         printf("\t-r   Operate on this root (only works with -d)\n");
 123         printf("\t-C   Delete a csum for the specified bytenr.  When used with -b it'll delete that many bytes, otherwise it's just sectorsize\n");
 124         exit(ret);
 125 }
 126
 127 static void corrupt_keys(struct btrfs_trans_handle *trans,
 128                          struct btrfs_fs_info *fs_info,
 129                          struct extent_buffer *eb)
 130 {
 131         int slot;
 132         int bad_slot;
 133         int nr;
 134         struct btrfs_disk_key bad_key;;
 135
 136         nr = btrfs_header_nritems(eb);
 137         if (nr == 0)
 138                 return;
 139
 140         slot = rand_range(nr);
 141         bad_slot = rand_range(nr);
 142
 143         if (bad_slot == slot)
 144                 return;
 145
 146         fprintf(stderr,
 147                 "corrupting keys in block %llu slot %d swapping with %d\n",
 148                 (unsigned long long)eb->start, slot, bad_slot);
 149
 150         if (btrfs_header_level(eb) == 0) {
 151                 btrfs_item_key(eb, &bad_key, bad_slot);
 152                 btrfs_set_item_key(eb, &bad_key, slot);
 153         } else {
 154                 btrfs_node_key(eb, &bad_key, bad_slot);
 155                 btrfs_set_node_key(eb, &bad_key, slot);
 156         }
 157         btrfs_mark_buffer_dirty(eb);
 158         if (!trans) {
 159                 u16 csum_size =
 160                         btrfs_super_csum_size(fs_info->super_copy);
 161                 csum_tree_block_size(eb, csum_size, 0);
 162                 write_extent_to_disk(eb);
 163         }
 164 }
 165
 166
 167 static int corrupt_keys_in_block(struct btrfs_fs_info *fs_info, u64 bytenr)
 168 {
 169         struct extent_buffer *eb;
 170
 171         eb = read_tree_block(fs_info, bytenr, 0);
 172         if (!extent_buffer_uptodate(eb))
 173                 return -EIO;;
 174
 175         corrupt_keys(NULL, fs_info, eb);
 176         free_extent_buffer(eb);
 177         return 0;
 178 }
 179
 180 static int corrupt_extent(struct btrfs_trans_handle *trans,
 181                           struct btrfs_root *root, u64 bytenr)
 182 {
 183         struct btrfs_key key;
 184         struct extent_buffer *leaf;
 185         u32 item_size;
 186         unsigned long ptr;
 187         struct btrfs_path *path;
 188         int ret;
 189         int slot;
 190         int should_del = rand_range(3);
 191
 192         path = btrfs_alloc_path();
 193         if (!path)
 194                 return -ENOMEM;
 195
 196         key.objectid = bytenr;
 197         key.type = (u8)-1;
 198         key.offset = (u64)-1;
 199
 200         while(1) {
 201                 ret = btrfs_search_slot(trans, root->fs_info->extent_root,
 202                                         &key, path, -1, 1);
 203                 if (ret < 0)
 204                         break;
 205
 206                 if (ret > 0) {
 207                         if (path->slots[0] == 0)
 208                                 break;
 209                         path->slots[0]--;
 210                         ret = 0;
 211                 }
 212                 leaf = path->nodes[0];
 213                 slot = path->slots[0];
 214                 btrfs_item_key_to_cpu(leaf, &key, slot);
 215                 if (key.objectid != bytenr)
 216                         break;
 217
 218                 if (key.type != BTRFS_EXTENT_ITEM_KEY &&
 219                     key.type != BTRFS_METADATA_ITEM_KEY &&
 220                     key.type != BTRFS_TREE_BLOCK_REF_KEY &&
 221                     key.type != BTRFS_EXTENT_DATA_REF_KEY &&
 222                     key.type != BTRFS_EXTENT_REF_V0_KEY &&
 223                     key.type != BTRFS_SHARED_BLOCK_REF_KEY &&
 224                     key.type != BTRFS_SHARED_DATA_REF_KEY)
 225                         goto next;
 226
 227                 if (should_del) {
 228                         fprintf(stderr,
 229                                 "deleting extent record: key %llu %u %llu\n",
 230                                 key.objectid, key.type, key.offset);
 231
 232                         if (key.type == BTRFS_EXTENT_ITEM_KEY) {
 233                                 /* make sure this extent doesn't get
 234                                  * reused for other purposes */
 235                                 btrfs_pin_extent(root->fs_info,
 236                                                  key.objectid, key.offset);
 237                         }
 238
 239                         btrfs_del_item(trans, root, path);
 240                 } else {
 241                         fprintf(stderr,
 242                                 "corrupting extent record: key %llu %u %llu\n",
 243                                 key.objectid, key.type, key.offset);
 244                         ptr = btrfs_item_ptr_offset(leaf, slot);
 245                         item_size = btrfs_item_size_nr(leaf, slot);
 246                         memset_extent_buffer(leaf, 0, ptr, item_size);
 247                         btrfs_mark_buffer_dirty(leaf);
 248                 }
 249 next:
 250                 btrfs_release_path(path);
 251
 252                 if (key.offset > 0)
 253                         key.offset--;
 254                 if (key.offset == 0)
 255                         break;
 256         }
 257
 258         btrfs_free_path(path);
 259         return 0;
 260 }
 261
 262 static void btrfs_corrupt_extent_leaf(struct btrfs_trans_handle *trans,
 263                                       struct btrfs_root *root,
 264                                       struct extent_buffer *eb)
 265 {
 266         u32 nr = btrfs_header_nritems(eb);
 267         u32 victim = rand_range(nr);
 268         u64 objectid;
 269         struct btrfs_key key;
 270
 271         btrfs_item_key_to_cpu(eb, &key, victim);
 272         objectid = key.objectid;
 273         corrupt_extent(trans, root, objectid);
 274 }
 275
 276 static void btrfs_corrupt_extent_tree(struct btrfs_trans_handle *trans,
 277                                       struct btrfs_root *root,
 278                                       struct extent_buffer *eb)
 279 {
 280         struct btrfs_fs_info *fs_info = root->fs_info;
 281         int i;
 282
 283         if (!eb)
 284                 return;
 285
 286         if (btrfs_is_leaf(eb)) {
 287                 btrfs_corrupt_extent_leaf(trans, root, eb);
 288                 return;
 289         }
 290
 291         if (btrfs_header_level(eb) == 1 && eb != root->node) {
 292                 if (rand_range(5))
 293                         return;
 294         }
 295
 296         for (i = 0; i < btrfs_header_nritems(eb); i++) {
 297                 struct extent_buffer *next;
 298
 299                 next = read_tree_block(fs_info, btrfs_node_blockptr(eb, i),
 300                                        btrfs_node_ptr_generation(eb, i));
 301                 if (!extent_buffer_uptodate(next))
 302                         continue;
 303                 btrfs_corrupt_extent_tree(trans, root, next);
 304                 free_extent_buffer(next);
 305         }
 306 }
 307
 308 enum btrfs_inode_field {
 309         BTRFS_INODE_FIELD_ISIZE,
 310         BTRFS_INODE_FIELD_NBYTES,
 311         BTRFS_INODE_FIELD_NLINK,
 312         BTRFS_INODE_FIELD_GENERATION,
 313         BTRFS_INODE_FIELD_TRANSID,
 314         BTRFS_INODE_FIELD_BLOCK_GROUP,
 315         BTRFS_INODE_FIELD_MODE,
 316         BTRFS_INODE_FIELD_UID,
 317         BTRFS_INODE_FIELD_GID,
 318         BTRFS_INODE_FIELD_BAD,
 319 };
 320
 321 enum btrfs_file_extent_field {
 322         BTRFS_FILE_EXTENT_DISK_BYTENR,
 323         BTRFS_FILE_EXTENT_BAD,
 324 };
 325
 326 enum btrfs_dir_item_field {
 327         BTRFS_DIR_ITEM_NAME,
 328         BTRFS_DIR_ITEM_LOCATION_OBJECTID,
 329         BTRFS_DIR_ITEM_BAD,
 330 };
 331
 332 enum btrfs_metadata_block_field {
 333         BTRFS_METADATA_BLOCK_GENERATION,
 334         BTRFS_METADATA_BLOCK_SHIFT_ITEMS,
 335         BTRFS_METADATA_BLOCK_BAD,
 336 };
 337
 338 enum btrfs_item_field {
 339         BTRFS_ITEM_OFFSET,
 340         BTRFS_ITEM_BAD,
 341 };
 342
 343 enum btrfs_key_field {
 344         BTRFS_KEY_OBJECTID,
 345         BTRFS_KEY_TYPE,
 346         BTRFS_KEY_OFFSET,
 347         BTRFS_KEY_BAD,
 348 };
 349
 350 static enum btrfs_inode_field convert_inode_field(char *field)
 351 {
 352         if (!strncmp(field, "isize", FIELD_BUF_LEN))
 353                 return BTRFS_INODE_FIELD_ISIZE;
 354         if (!strncmp(field, "nbytes", FIELD_BUF_LEN))
 355                 return BTRFS_INODE_FIELD_NBYTES;
 356         if (!strncmp(field, "nlink", FIELD_BUF_LEN))
 357                 return BTRFS_INODE_FIELD_NLINK;
 358         if (!strncmp(field, "generation", FIELD_BUF_LEN))
 359                 return BTRFS_INODE_FIELD_GENERATION;
 360         if (!strncmp(field, "transid", FIELD_BUF_LEN))
 361                 return BTRFS_INODE_FIELD_TRANSID;
 362         if (!strncmp(field, "block_group", FIELD_BUF_LEN))
 363                 return BTRFS_INODE_FIELD_BLOCK_GROUP;
 364         if (!strncmp(field, "mode", FIELD_BUF_LEN))
 365                 return BTRFS_INODE_FIELD_MODE;
 366         if (!strncmp(field, "uid", FIELD_BUF_LEN))
 367                 return BTRFS_INODE_FIELD_UID;
 368         if (!strncmp(field, "gid", FIELD_BUF_LEN))
 369                 return BTRFS_INODE_FIELD_GID;
 370         return BTRFS_INODE_FIELD_BAD;
 371 }
 372
 373 static enum btrfs_file_extent_field convert_file_extent_field(char *field)
 374 {
 375         if (!strncmp(field, "disk_bytenr", FIELD_BUF_LEN))
 376                 return BTRFS_FILE_EXTENT_DISK_BYTENR;
 377         return BTRFS_FILE_EXTENT_BAD;
 378 }
 379
 380 static enum btrfs_metadata_block_field
 381 convert_metadata_block_field(char *field)
 382 {
 383         if (!strncmp(field, "generation", FIELD_BUF_LEN))
 384                 return BTRFS_METADATA_BLOCK_GENERATION;
 385         if (!strncmp(field, "shift_items", FIELD_BUF_LEN))
 386                 return BTRFS_METADATA_BLOCK_SHIFT_ITEMS;
 387         return BTRFS_METADATA_BLOCK_BAD;
 388 }
 389
 390 static enum btrfs_key_field convert_key_field(char *field)
 391 {
 392         if (!strncmp(field, "objectid", FIELD_BUF_LEN))
 393                 return BTRFS_KEY_OBJECTID;
 394         if (!strncmp(field, "type", FIELD_BUF_LEN))
 395                 return BTRFS_KEY_TYPE;
 396         if (!strncmp(field, "offset", FIELD_BUF_LEN))
 397                 return BTRFS_KEY_OFFSET;
 398         return BTRFS_KEY_BAD;
 399 }
 400
 401 static enum btrfs_item_field convert_item_field(char *field)
 402 {
 403         if (!strncmp(field, "offset", FIELD_BUF_LEN))
 404                 return BTRFS_ITEM_OFFSET;
 405         return BTRFS_ITEM_BAD;
 406 }
 407
 408 static enum btrfs_dir_item_field convert_dir_item_field(char *field)
 409 {
 410         if (!strncmp(field, "name", FIELD_BUF_LEN))
 411                 return BTRFS_DIR_ITEM_NAME;
 412         if (!strncmp(field, "location_objectid", FIELD_BUF_LEN))
 413                 return BTRFS_DIR_ITEM_LOCATION_OBJECTID;
 414         return BTRFS_DIR_ITEM_BAD;
 415 }
 416
 417 static u64 generate_u64(u64 orig)
 418 {
 419         u64 ret;
 420         do {
 421                 ret = rand_u64();
 422         } while (ret == orig);
 423         return ret;
 424 }
 425
 426 static u32 generate_u32(u32 orig)
 427 {
 428         u32 ret;
 429         do {
 430                 ret = rand_u32();
 431         } while (ret == orig);
 432         return ret;
 433 }
 434
 435 static u8 generate_u8(u8 orig)
 436 {
 437         u8 ret;
 438         do {
 439                 ret = rand_u8();
 440         } while (ret == orig);
 441         return ret;
 442 }
 443
 444 static int corrupt_key(struct btrfs_root *root, struct btrfs_key *key,
 445                        char *field)
 446 {
 447         enum btrfs_key_field corrupt_field = convert_key_field(field);
 448         struct btrfs_path *path;
 449         struct btrfs_trans_handle *trans;
 450         int ret;
 451
 452         if (corrupt_field == BTRFS_KEY_BAD) {
 453                 fprintf(stderr, "Invalid field %s\n", field);
 454                 return -EINVAL;
 455         }
 456
 457         path = btrfs_alloc_path();
 458         if (!path)
 459                 return -ENOMEM;
 460
 461         trans = btrfs_start_transaction(root, 1);
 462         if (IS_ERR(trans)) {
 463                 btrfs_free_path(path);
 464                 return PTR_ERR(trans);
 465         }
 466
 467         ret = btrfs_search_slot(trans, root, key, path, 0, 1);
 468         if (ret < 0)
 469                 goto out;
 470         if (ret > 0) {
 471                 fprintf(stderr, "Couldn't find the key to corrupt\n");
 472                 ret = -ENOENT;
 473                 goto out;
 474         }
 475
 476         switch (corrupt_field) {
 477         case BTRFS_KEY_OBJECTID:
 478                 key->objectid = generate_u64(key->objectid);
 479                 break;
 480         case BTRFS_KEY_TYPE:
 481                 key->type = generate_u8(key->type);
 482                 break;
 483         case BTRFS_KEY_OFFSET:
 484                 key->offset = generate_u64(key->objectid);
 485                 break;
 486         default:
 487                 fprintf(stderr, "Invalid field %s, %d\n", field,
 488                         corrupt_field);
 489                 ret = -EINVAL;
 490                 goto out;
 491         }
 492
 493         btrfs_set_item_key_unsafe(root, path, key);
 494 out:
 495         btrfs_free_path(path);
 496         btrfs_commit_transaction(trans, root);
 497         return ret;
 498 }
 499
 500 static int corrupt_dir_item(struct btrfs_root *root, struct btrfs_key *key,
 501                             char *field)
 502 {
 503         struct btrfs_trans_handle *trans;
 504         struct btrfs_dir_item *di;
 505         struct btrfs_path *path;
 506         char name[PATH_MAX];
 507         struct btrfs_key location;
 508         struct btrfs_disk_key disk_key;
 509         unsigned long name_ptr;
 510         enum btrfs_dir_item_field corrupt_field =
 511                 convert_dir_item_field(field);
 512         u64 bogus;
 513         u16 name_len;
 514         int ret;
 515
 516         if (corrupt_field == BTRFS_DIR_ITEM_BAD) {
 517                 fprintf(stderr, "Invalid field %s\n", field);
 518                 return -EINVAL;
 519         }
 520
 521         path = btrfs_alloc_path();
 522         if (!path)
 523                 return -ENOMEM;
 524
 525         trans = btrfs_start_transaction(root, 1);
 526         if (IS_ERR(trans)) {
 527                 btrfs_free_path(path);
 528                 return PTR_ERR(trans);
 529         }
 530
 531         ret = btrfs_search_slot(trans, root, key, path, 0, 1);
 532         if (ret) {
 533                 if (ret > 0)
 534                         ret = -ENOENT;
 535                 fprintf(stderr, "Error searching for dir item %d\n", ret);
 536                 goto out;
 537         }
 538
 539         di = btrfs_item_ptr(path->nodes[0], path->slots[0],
 540                             struct btrfs_dir_item);
 541
 542         switch (corrupt_field) {
 543         case BTRFS_DIR_ITEM_NAME:
 544                 name_len = btrfs_dir_name_len(path->nodes[0], di);
 545                 name_ptr = (unsigned long)(di + 1);
 546                 read_extent_buffer(path->nodes[0], name, name_ptr, name_len);
 547                 name[0]++;
 548                 write_extent_buffer(path->nodes[0], name, name_ptr, name_len);
 549                 btrfs_mark_buffer_dirty(path->nodes[0]);
 550                 goto out;
 551         case BTRFS_DIR_ITEM_LOCATION_OBJECTID:
 552                 btrfs_dir_item_key_to_cpu(path->nodes[0], di, &location);
 553                 bogus = generate_u64(location.objectid);
 554                 location.objectid = bogus;
 555                 btrfs_cpu_key_to_disk(&disk_key, &location);
 556                 btrfs_set_dir_item_key(path->nodes[0], di, &disk_key);
 557                 btrfs_mark_buffer_dirty(path->nodes[0]);
 558                 goto out;
 559         default:
 560                 ret = -EINVAL;
 561                 goto out;
 562         }
 563 out:
 564         btrfs_commit_transaction(trans, root);
 565         btrfs_free_path(path);
 566         return ret;
 567 }
 568
 569 static int corrupt_inode(struct btrfs_trans_handle *trans,
 570                          struct btrfs_root *root, u64 inode, char *field)
 571 {
 572         struct btrfs_inode_item *ei;
 573         struct btrfs_path *path;
 574         struct btrfs_key key;
 575         enum btrfs_inode_field corrupt_field = convert_inode_field(field);
 576         u64 bogus;
 577         u64 orig;
 578         int ret;
 579
 580         if (corrupt_field == BTRFS_INODE_FIELD_BAD) {
 581                 fprintf(stderr, "Invalid field %s\n", field);
 582                 return -EINVAL;
 583         }
 584
 585         key.objectid = inode;
 586         key.type = BTRFS_INODE_ITEM_KEY;
 587         key.offset = (u64)-1;
 588
 589         path = btrfs_alloc_path();
 590         if (!path)
 591                 return -ENOMEM;
 592
 593         ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
 594         if (ret < 0)
 595                 goto out;
 596         if (ret) {
 597                 if (!path->slots[0]) {
 598                         fprintf(stderr, "Couldn't find inode %Lu\n", inode);
 599                         ret = -ENOENT;
 600                         goto out;
 601                 }
 602                 path->slots[0]--;
 603                 ret = 0;
 604         }
 605
 606         btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
 607         if (key.objectid != inode) {
 608                 fprintf(stderr, "Couldn't find inode %Lu\n", inode);
 609                 ret = -ENOENT;
 610                 goto out;
 611         }
 612
 613         ei = btrfs_item_ptr(path->nodes[0], path->slots[0],
 614                             struct btrfs_inode_item);
 615         switch (corrupt_field) {
 616         case BTRFS_INODE_FIELD_ISIZE:
 617                 orig = btrfs_inode_size(path->nodes[0], ei);
 618                 bogus = generate_u64(orig);
 619                 btrfs_set_inode_size(path->nodes[0], ei, bogus);
 620                 break;
 621         case BTRFS_INODE_FIELD_NBYTES:
 622                 orig = btrfs_inode_nbytes(path->nodes[0], ei);
 623                 bogus = generate_u64(orig);
 624                 btrfs_set_inode_nbytes(path->nodes[0], ei, bogus);
 625                 break;
 626         case BTRFS_INODE_FIELD_NLINK:
 627                 orig = btrfs_inode_nlink(path->nodes[0], ei);
 628                 bogus = generate_u32(orig);
 629                 btrfs_set_inode_nlink(path->nodes[0], ei, bogus);
 630                 break;
 631         case BTRFS_INODE_FIELD_GENERATION:
 632                 orig = btrfs_inode_generation(path->nodes[0], ei);
 633                 bogus = generate_u64(orig);
 634                 btrfs_set_inode_generation(path->nodes[0], ei, bogus);
 635                 break;
 636         case BTRFS_INODE_FIELD_TRANSID:
 637                 orig = btrfs_inode_transid(path->nodes[0], ei);
 638                 bogus = generate_u64(orig);
 639                 btrfs_set_inode_transid(path->nodes[0], ei, bogus);
 640                 break;
 641         case BTRFS_INODE_FIELD_BLOCK_GROUP:
 642                 orig = btrfs_inode_block_group(path->nodes[0], ei);
 643                 bogus = generate_u64(orig);
 644                 btrfs_set_inode_block_group(path->nodes[0], ei, bogus);
 645                 break;
 646         case BTRFS_INODE_FIELD_MODE:
 647                 orig = btrfs_inode_mode(path->nodes[0], ei);
 648                 bogus = generate_u32(orig);
 649                 btrfs_set_inode_mode(path->nodes[0], ei, bogus);
 650                 break;
 651         case BTRFS_INODE_FIELD_UID:
 652                 orig = btrfs_inode_uid(path->nodes[0], ei);
 653                 bogus = generate_u32(orig);
 654                 btrfs_set_inode_uid(path->nodes[0], ei, bogus);
 655                 break;
 656         case BTRFS_INODE_FIELD_GID:
 657                 orig = btrfs_inode_gid(path->nodes[0], ei);
 658                 bogus = generate_u32(orig);
 659                 btrfs_set_inode_gid(path->nodes[0], ei, bogus);
 660                 break;
 661         default:
 662                 ret = -EINVAL;
 663                 break;
 664         }
 665         btrfs_mark_buffer_dirty(path->nodes[0]);
 666 out:
 667         btrfs_free_path(path);
 668         return ret;
 669 }
 670
 671 static int corrupt_file_extent(struct btrfs_trans_handle *trans,
 672                                struct btrfs_root *root, u64 inode, u64 extent,
 673                                char *field)
 674 {
 675         struct btrfs_file_extent_item *fi;
 676         struct btrfs_path *path;
 677         struct btrfs_key key;
 678         enum btrfs_file_extent_field corrupt_field;
 679         u64 bogus;
 680         u64 orig;
 681         int ret = 0;
 682
 683         corrupt_field = convert_file_extent_field(field);
 684         if (corrupt_field == BTRFS_FILE_EXTENT_BAD) {
 685                 fprintf(stderr, "Invalid field %s\n", field);
 686                 return -EINVAL;
 687         }
 688
 689         key.objectid = inode;
 690         key.type = BTRFS_EXTENT_DATA_KEY;
 691         key.offset = extent;
 692
 693         path = btrfs_alloc_path();
 694         if (!path)
 695                 return -ENOMEM;
 696
 697         ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
 698         if (ret < 0)
 699                 goto out;
 700         if (ret) {
 701                 fprintf(stderr, "Couldn't find extent %llu for inode %llu\n",
 702                         extent, inode);
 703                 ret = -ENOENT;
 704                 goto out;
 705         }
 706
 707         fi = btrfs_item_ptr(path->nodes[0], path->slots[0],
 708                             struct btrfs_file_extent_item);
 709         switch (corrupt_field) {
 710         case BTRFS_FILE_EXTENT_DISK_BYTENR:
 711                 orig = btrfs_file_extent_disk_bytenr(path->nodes[0], fi);
 712                 bogus = generate_u64(orig);
 713                 btrfs_set_file_extent_disk_bytenr(path->nodes[0], fi, bogus);
 714                 break;
 715         default:
 716                 ret = -EINVAL;
 717                 break;
 718         }
 719         btrfs_mark_buffer_dirty(path->nodes[0]);
 720 out:
 721         btrfs_free_path(path);
 722         return ret;
 723 }
 724
 725 static void shift_items(struct btrfs_root *root, struct extent_buffer *eb)
 726 {
 727         int nritems = btrfs_header_nritems(eb);
 728         int shift_space = btrfs_leaf_free_space(eb) / 2;
 729         int slot = nritems / 2;
 730         int i = 0;
 731         unsigned int data_end = btrfs_item_offset_nr(eb, nritems - 1);
 732
 733         /* Shift the item data up to and including slot back by shift space */
 734         memmove_extent_buffer(eb, btrfs_leaf_data(eb) + data_end - shift_space,
 735                               btrfs_leaf_data(eb) + data_end,
 736                               btrfs_item_offset_nr(eb, slot - 1) - data_end);
 737
 738         /* Now update the item pointers. */
 739         for (i = nritems - 1; i >= slot; i--) {
 740                 u32 offset = btrfs_item_offset_nr(eb, i);
 741                 offset -= shift_space;
 742                 btrfs_set_item_offset(eb, btrfs_item_nr(i), offset);
 743         }
 744 }
 745
 746 static int corrupt_metadata_block(struct btrfs_fs_info *fs_info, u64 block,
 747                                   char *field)
 748 {
 749         struct btrfs_trans_handle *trans;
 750         struct btrfs_root *root;
 751         struct btrfs_path *path;
 752         struct extent_buffer *eb;
 753         struct btrfs_key key, root_key;
 754         enum btrfs_metadata_block_field corrupt_field;
 755         u64 root_objectid;
 756         u64 orig, bogus;
 757         u8 level;
 758         int ret;
 759
 760         corrupt_field = convert_metadata_block_field(field);
 761         if (corrupt_field == BTRFS_METADATA_BLOCK_BAD) {
 762                 fprintf(stderr, "Invalid field %s\n", field);
 763                 return -EINVAL;
 764         }
 765
 766         eb = read_tree_block(fs_info, block, 0);
 767         if (!extent_buffer_uptodate(eb)) {
 768                 fprintf(stderr, "Couldn't read in tree block %s\n", field);
 769                 return -EINVAL;
 770         }
 771         root_objectid = btrfs_header_owner(eb);
 772         level = btrfs_header_level(eb);
 773         if (level)
 774                 btrfs_node_key_to_cpu(eb, &key, 0);
 775         else
 776                 btrfs_item_key_to_cpu(eb, &key, 0);
 777         free_extent_buffer(eb);
 778
 779         root_key.objectid = root_objectid;
 780         root_key.type = BTRFS_ROOT_ITEM_KEY;
 781         root_key.offset = (u64)-1;
 782
 783         root = btrfs_read_fs_root(fs_info, &root_key);
 784         if (IS_ERR(root)) {
 785                 fprintf(stderr, "Couldn't find owner root %llu\n",
 786                         key.objectid);
 787                 return PTR_ERR(root);
 788         }
 789
 790         path = btrfs_alloc_path();
 791         if (!path)
 792                 return -ENOMEM;
 793
 794         trans = btrfs_start_transaction(root, 1);
 795         if (IS_ERR(trans)) {
 796                 btrfs_free_path(path);
 797                 fprintf(stderr, "Couldn't start transaction %ld\n",
 798                         PTR_ERR(trans));
 799                 return PTR_ERR(trans);
 800         }
 801
 802         path->lowest_level = level;
 803         ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
 804         if (ret < 0) {
 805                 fprintf(stderr, "Error searching to node %d\n", ret);
 806                 goto out;
 807         }
 808         eb = path->nodes[level];
 809
 810         ret = 0;
 811         switch (corrupt_field) {
 812         case BTRFS_METADATA_BLOCK_GENERATION:
 813                 orig = btrfs_header_generation(eb);
 814                 bogus = generate_u64(orig);
 815                 btrfs_set_header_generation(eb, bogus);
 816                 break;
 817         case BTRFS_METADATA_BLOCK_SHIFT_ITEMS:
 818                 shift_items(root, path->nodes[level]);
 819                 break;
 820         default:
 821                 ret = -EINVAL;
 822                 break;
 823         }
 824         btrfs_mark_buffer_dirty(path->nodes[level]);
 825 out:
 826         btrfs_commit_transaction(trans, root);
 827         btrfs_free_path(path);
 828         return ret;
 829 }
 830
 831 static int corrupt_btrfs_item(struct btrfs_root *root, struct btrfs_key *key,
 832                               char *field)
 833 {
 834         struct btrfs_trans_handle *trans;
 835         struct btrfs_path *path;
 836         enum btrfs_item_field corrupt_field;
 837         u32 orig, bogus;
 838         int ret;
 839
 840         corrupt_field = convert_item_field(field);
 841         if (corrupt_field == BTRFS_ITEM_BAD) {
 842                 fprintf(stderr, "Invalid field %s\n", field);
 843                 return -EINVAL;
 844         }
 845
 846         path = btrfs_alloc_path();
 847         if (!path)
 848                 return -ENOMEM;
 849
 850         trans = btrfs_start_transaction(root, 1);
 851         if (IS_ERR(trans)) {
 852                 btrfs_free_path(path);
 853                 fprintf(stderr, "Couldn't start transaction %ld\n",
 854                         PTR_ERR(trans));
 855                 return PTR_ERR(trans);
 856         }
 857
 858         ret = btrfs_search_slot(trans, root, key, path, 0, 1);
 859         if (ret != 0) {
 860                 fprintf(stderr, "Error searching to node %d\n", ret);
 861                 goto out;
 862         }
 863
 864         ret = 0;
 865         switch (corrupt_field) {
 866         case BTRFS_ITEM_OFFSET:
 867                 orig = btrfs_item_offset_nr(path->nodes[0], path->slots[0]);
 868                 bogus = generate_u32(orig);
 869                 btrfs_set_item_offset(path->nodes[0],
 870                                       btrfs_item_nr(path->slots[0]), bogus);
 871                 break;
 872         default:
 873                 ret = -EINVAL;
 874                 break;
 875         }
 876         btrfs_mark_buffer_dirty(path->nodes[0]);
 877 out:
 878         btrfs_commit_transaction(trans, root);
 879         btrfs_free_path(path);
 880         return ret;
 881 }
 882
 883 static int delete_item(struct btrfs_root *root, struct btrfs_key *key)
 884 {
 885         struct btrfs_trans_handle *trans;
 886         struct btrfs_path *path;
 887         int ret;
 888
 889         path = btrfs_alloc_path();
 890         if (!path)
 891                 return -ENOMEM;
 892
 893         trans = btrfs_start_transaction(root, 1);
 894         if (IS_ERR(trans)) {
 895                 btrfs_free_path(path);
 896                 fprintf(stderr, "Couldn't start transaction %ld\n",
 897                         PTR_ERR(trans));
 898                 return PTR_ERR(trans);
 899         }
 900
 901         ret = btrfs_search_slot(trans, root, key, path, -1, 1);
 902         if (ret) {
 903                 if (ret > 0)
 904                         ret = -ENOENT;
 905                 fprintf(stderr, "Error searching to node %d\n", ret);
 906                 goto out;
 907         }
 908         ret = btrfs_del_item(trans, root, path);
 909         btrfs_mark_buffer_dirty(path->nodes[0]);
 910 out:
 911         btrfs_commit_transaction(trans, root);
 912         btrfs_free_path(path);
 913         return ret;
 914 }
 915
 916 static int delete_csum(struct btrfs_root *root, u64 bytenr, u64 bytes)
 917 {
 918         struct btrfs_trans_handle *trans;
 919         int ret;
 920
 921         root = root->fs_info->csum_root;
 922         trans = btrfs_start_transaction(root, 1);
 923         if (IS_ERR(trans)) {
 924                 fprintf(stderr, "Couldn't start transaction %ld\n",
 925                         PTR_ERR(trans));
 926                 return PTR_ERR(trans);
 927         }
 928
 929         ret = btrfs_del_csums(trans, root, bytenr, bytes);
 930         if (ret)
 931                 fprintf(stderr, "Error deleting csums %d\n", ret);
 932         btrfs_commit_transaction(trans, root);
 933         return ret;
 934 }
 935
 936 /* corrupt item using NO cow.
 937  * Because chunk recover will recover based on whole partition scanning,
 938  * If using COW, chunk recover will use the old item to recover,
 939  * which is still OK but we want to check the ability to rebuild chunk
 940  * not only restore the old ones */
 941 static int corrupt_item_nocow(struct btrfs_trans_handle *trans,
 942                        struct btrfs_root *root, struct btrfs_path *path,
 943                        int del)
 944 {
 945         int ret = 0;
 946         struct btrfs_key key;
 947         struct extent_buffer *leaf;
 948         unsigned long ptr;
 949         int slot;
 950         u32 item_size;
 951
 952         leaf = path->nodes[0];
 953         slot = path->slots[0];
 954         /* Not deleting the first item of a leaf to keep leaf structure */
 955         if (slot == 0)
 956                 del = 0;
 957         /* Only accept valid eb */
 958         if (slot >= btrfs_header_nritems(leaf)) {
 959                 error("invalid eb: no data or slot out of range: %d >= %d",
 960                                 slot, btrfs_header_nritems(leaf));
 961                 return -EINVAL;
 962         }
 963         btrfs_item_key_to_cpu(leaf, &key, slot);
 964         if (del) {
 965                 fprintf(stdout, "Deleting key and data [%llu, %u, %llu].\n",
 966                         key.objectid, key.type, key.offset);
 967                 btrfs_del_item(trans, root, path);
 968         } else {
 969                 fprintf(stdout, "Corrupting key and data [%llu, %u, %llu].\n",
 970                         key.objectid, key.type, key.offset);
 971                 ptr = btrfs_item_ptr_offset(leaf, slot);
 972                 item_size = btrfs_item_size_nr(leaf, slot);
 973                 memset_extent_buffer(leaf, 0, ptr, item_size);
 974                 btrfs_mark_buffer_dirty(leaf);
 975         }
 976         return ret;
 977 }
 978 static int corrupt_chunk_tree(struct btrfs_trans_handle *trans,
 979                        struct btrfs_root *root)
 980 {
 981         int ret;
 982         int del;
 983         int slot;
 984         struct btrfs_path *path;
 985         struct btrfs_key key;
 986         struct btrfs_key found_key;
 987         struct extent_buffer *leaf;
 988
 989         path = btrfs_alloc_path();
 990         if (!path)
 991                 return -ENOMEM;
 992
 993         key.objectid = (u64)-1;
 994         key.offset = (u64)-1;
 995         key.type = (u8)-1;
 996
 997         /* Here, cow and ins_len must equals 0 for the following reasons:
 998          * 1) chunk recover is based on disk scanning, so COW should be
 999          *    disabled in case the original chunk being scanned and
1000          *    recovered using the old chunk.
1001          * 2) if cow = 0, ins_len must also be set to 0, or BUG_ON will be
1002          *    triggered.
1003          */
1004         ret = btrfs_search_slot(trans, root, &key, path, 0, 0);
1005         BUG_ON(ret == 0);
1006         if (ret < 0) {
1007                 fprintf(stderr, "Error searching tree\n");
1008                 goto free_out;
1009         }
1010         /* corrupt/del dev_item first */
1011         while (!btrfs_previous_item(root, path, 0, BTRFS_DEV_ITEM_KEY)) {
1012                 slot = path->slots[0];
1013                 leaf = path->nodes[0];
1014                 del = rand_range(3);
1015                 /* Never delete the first item to keep the leaf structure */
1016                 if (path->slots[0] == 0)
1017                         del = 0;
1018                 ret = corrupt_item_nocow(trans, root, path, del);
1019                 if (ret)
1020                         goto free_out;
1021         }
1022         btrfs_release_path(path);
1023
1024         /* Here, cow and ins_len must equals 0 for the following reasons:
1025          * 1) chunk recover is based on disk scanning, so COW should be
1026          *    disabled in case the original chunk being scanned and
1027          *    recovered using the old chunk.
1028          * 2) if cow = 0, ins_len must also be set to 0, or BUG_ON will be
1029          *    triggered.
1030          */
1031         ret = btrfs_search_slot(trans, root, &key, path, 0, 0);
1032         BUG_ON(ret == 0);
1033         if (ret < 0) {
1034                 fprintf(stderr, "Error searching tree\n");
1035                 goto free_out;
1036         }
1037         /* corrupt/del chunk then*/
1038         while (!btrfs_previous_item(root, path, 0, BTRFS_CHUNK_ITEM_KEY)) {
1039                 slot = path->slots[0];
1040                 leaf = path->nodes[0];
1041                 del = rand_range(3);
1042                 btrfs_item_key_to_cpu(leaf, &found_key, slot);
1043                 ret = corrupt_item_nocow(trans, root, path, del);
1044                 if (ret)
1045                         goto free_out;
1046         }
1047 free_out:
1048         btrfs_free_path(path);
1049         return ret;
1050 }
1051 static int find_chunk_offset(struct btrfs_root *root,
1052                       struct btrfs_path *path, u64 offset)
1053 {
1054         struct btrfs_key key;
1055         int ret;
1056
1057         key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
1058         key.type = BTRFS_CHUNK_ITEM_KEY;
1059         key.offset = offset;
1060
1061         /* Here, cow and ins_len must equals 0 for following reasons:
1062          * 1) chunk recover is based on disk scanning, so COW should
1063          *    be disabled in case the original chunk being scanned
1064          *    and recovered using the old chunk.
1065          * 2) if cow = 0, ins_len must also be set to 0, or BUG_ON
1066          *    will be triggered.
1067          */
1068         ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
1069         if (ret > 0) {
1070                 fprintf(stderr, "Can't find chunk with given offset %llu\n",
1071                         offset);
1072                 goto out;
1073         }
1074         if (ret < 0) {
1075                 fprintf(stderr, "Error searching chunk\n");
1076                 goto out;
1077         }
1078 out:
1079         return ret;
1080
1081 }
1082
1083 static void parse_key(u64 *objectid, u8 *type, u64 *offset)
1084 {
1085
1086         int ret = sscanf(optarg, "%llu,%hhu,%llu", objectid, type, offset);
1087         if (ret != 3) {
1088                 fprintf(stderr, "error parsing key '%s': %d\n", optarg, errno);
1089                 print_usage(1);
1090         }
1091 }
1092
1093 static struct btrfs_root *open_root(struct btrfs_fs_info *fs_info,
1094                                     u64 root_objectid)
1095 {
1096
1097         struct btrfs_key root_key;
1098         struct btrfs_root *root;
1099
1100         root_key.objectid = root_objectid;
1101         root_key.type = BTRFS_ROOT_ITEM_KEY;
1102         root_key.offset = (u64)-1;
1103
1104         root = btrfs_read_fs_root(fs_info, &root_key);
1105         if (IS_ERR(root)) {
1106                 fprintf(stderr, "couldn't find root %llu\n", root_objectid);
1107                 print_usage(1);
1108         }
1109
1110         return root;
1111 }
1112 int main(int argc, char **argv)
1113 {
1114         struct cache_tree root_cache;
1115         struct btrfs_key key;
1116         struct btrfs_root *root, *target_root;
1117         char *dev;
1118         /* chunk offset can be 0,so change to (u64)-1 */
1119         u64 logical = (u64)-1;
1120         int ret = 0;
1121         u64 copy = 0;
1122         u64 bytes = 4096;
1123         int extent_rec = 0;
1124         int extent_tree = 0;
1125         int corrupt_block_keys = 0;
1126         int chunk_rec = 0;
1127         int chunk_tree = 0;
1128         int corrupt_item = 0;
1129         int corrupt_di = 0;
1130         int delete = 0;
1131         int should_corrupt_key = 0;
1132         u64 metadata_block = 0;
1133         u64 inode = 0;
1134         u64 file_extent = (u64)-1;
1135         u64 root_objectid = 0;
1136         u64 csum_bytenr = 0;
1137         char field[FIELD_BUF_LEN];
1138
1139         field[0] = '\0';
1140         memset(&key, 0, sizeof(key));
1141
1142         while(1) {
1143                 int c;
1144                 static const struct option long_options[] = {
1145                         /* { "byte-count", 1, NULL, 'b' }, */
1146                         { "logical", required_argument, NULL, 'l' },
1147                         { "copy", required_argument, NULL, 'c' },
1148                         { "bytes", required_argument, NULL, 'b' },
1149                         { "extent-record", no_argument, NULL, 'e' },
1150                         { "extent-tree", no_argument, NULL, 'E' },
1151                         { "keys", no_argument, NULL, 'k' },
1152                         { "chunk-record", no_argument, NULL, 'u' },
1153                         { "chunk-tree", no_argument, NULL, 'U' },
1154                         { "inode", required_argument, NULL, 'i'},
1155                         { "file-extent", required_argument, NULL, 'x'},
1156                         { "metadata-block", required_argument, NULL, 'm'},
1157                         { "field", required_argument, NULL, 'f'},
1158                         { "key", required_argument, NULL, 'K'},
1159                         { "item", no_argument, NULL, 'I'},
1160                         { "dir-item", no_argument, NULL, 'D'},
1161                         { "delete", no_argument, NULL, 'd'},
1162                         { "root", no_argument, NULL, 'r'},
1163                         { "csum", required_argument, NULL, 'C'},
1164                         { "help", no_argument, NULL, GETOPT_VAL_HELP},
1165                         { NULL, 0, NULL, 0 }
1166                 };
1167
1168                 c = getopt_long(argc, argv, "l:c:b:eEkuUi:f:x:m:K:I:D:d:r:C:",
1169                                 long_options, NULL);
1170                 if (c < 0)
1171                         break;
1172                 switch(c) {
1173                         case 'l':
1174                                 logical = arg_strtou64(optarg);
1175                                 break;
1176                         case 'c':
1177                                 copy = arg_strtou64(optarg);
1178                                 break;
1179                         case 'b':
1180                                 bytes = arg_strtou64(optarg);
1181                                 break;
1182                         case 'e':
1183                                 extent_rec = 1;
1184                                 break;
1185                         case 'E':
1186                                 extent_tree = 1;
1187                                 break;
1188                         case 'k':
1189                                 corrupt_block_keys = 1;
1190                                 break;
1191                         case 'u':
1192                                 chunk_rec = 1;
1193                                 break;
1194                         case 'U':
1195                                 chunk_tree = 1;
1196                                 break;
1197                         case 'i':
1198                                 inode = arg_strtou64(optarg);
1199                                 break;
1200                         case 'f':
1201                                 strncpy(field, optarg, FIELD_BUF_LEN);
1202                                 break;
1203                         case 'x':
1204                                 file_extent = arg_strtou64(optarg);
1205                                 break;
1206                         case 'm':
1207                                 metadata_block = arg_strtou64(optarg);
1208                                 break;
1209                         case 'K':
1210                                 should_corrupt_key = 1;
1211                                 parse_key(&key.objectid, &key.type, &key.offset);
1212                                 break;
1213                         case 'D':
1214                                 corrupt_di = 1;
1215                                 parse_key(&key.objectid, &key.type, &key.offset);
1216                                 break;
1217                         case 'I':
1218                                 corrupt_item = 1;
1219                                 parse_key(&key.objectid, &key.type, &key.offset);
1220                                 break;
1221                         case 'd':
1222                                 delete = 1;
1223                                 parse_key(&key.objectid, &key.type, &key.offset);
1224                                 break;
1225                         case 'r':
1226                                 root_objectid = arg_strtou64(optarg);
1227                                 break;
1228                         case 'C':
1229                                 csum_bytenr = arg_strtou64(optarg);
1230                                 break;
1231                         case GETOPT_VAL_HELP:
1232                         default:
1233                                 print_usage(c != GETOPT_VAL_HELP);
1234                 }
1235         }
1236         set_argv0(argv);
1237         if (check_argc_min(argc - optind, 1))
1238                 print_usage(1);
1239         dev = argv[optind];
1240
1241         radix_tree_init();
1242         cache_tree_init(&root_cache);
1243
1244         root = open_ctree(dev, 0, OPEN_CTREE_WRITES);
1245         if (!root) {
1246                 fprintf(stderr, "Open ctree failed\n");
1247                 exit(1);
1248         }
1249         target_root = root;
1250         if (root_objectid)
1251                 target_root = open_root(root->fs_info, root_objectid);
1252
1253         if (extent_rec) {
1254                 struct btrfs_trans_handle *trans;
1255
1256                 if (logical == (u64)-1)
1257                         print_usage(1);
1258                 trans = btrfs_start_transaction(root, 1);
1259                 BUG_ON(IS_ERR(trans));
1260                 ret = corrupt_extent(trans, root, logical);
1261                 btrfs_commit_transaction(trans, root);
1262                 goto out_close;
1263         }
1264         if (extent_tree) {
1265                 struct btrfs_trans_handle *trans;
1266
1267                 trans = btrfs_start_transaction(root, 1);
1268                 BUG_ON(IS_ERR(trans));
1269                 btrfs_corrupt_extent_tree(trans, root->fs_info->extent_root,
1270                                           root->fs_info->extent_root->node);
1271                 btrfs_commit_transaction(trans, root);
1272                 goto out_close;
1273         }
1274         if (chunk_rec) {
1275                 struct btrfs_trans_handle *trans;
1276                 struct btrfs_path *path;
1277                 int del;
1278
1279                 if (logical == (u64)-1)
1280                         print_usage(1);
1281                 del = rand_range(3);
1282                 path = btrfs_alloc_path();
1283                 if (!path) {
1284                         fprintf(stderr, "path allocation failed\n");
1285                         goto out_close;
1286                 }
1287
1288                 if (find_chunk_offset(root->fs_info->chunk_root, path,
1289                                       logical) != 0) {
1290                         btrfs_free_path(path);
1291                         goto out_close;
1292                 }
1293                 trans = btrfs_start_transaction(root, 1);
1294                 BUG_ON(IS_ERR(trans));
1295                 ret = corrupt_item_nocow(trans, root->fs_info->chunk_root,
1296                                          path, del);
1297                 if (ret < 0)
1298                         fprintf(stderr, "Failed to corrupt chunk record\n");
1299                 btrfs_commit_transaction(trans, root);
1300                 goto out_close;
1301         }
1302         if (chunk_tree) {
1303                 struct btrfs_trans_handle *trans;
1304
1305                 trans = btrfs_start_transaction(root, 1);
1306                 BUG_ON(IS_ERR(trans));
1307                 ret = corrupt_chunk_tree(trans, root->fs_info->chunk_root);
1308                 if (ret < 0)
1309                         fprintf(stderr, "Failed to corrupt chunk tree\n");
1310                 btrfs_commit_transaction(trans, root);
1311                 goto out_close;
1312         }
1313         if (inode) {
1314                 struct btrfs_trans_handle *trans;
1315
1316                 if (*field == 0)
1317                         print_usage(1);
1318
1319                 trans = btrfs_start_transaction(root, 1);
1320                 BUG_ON(IS_ERR(trans));
1321                 if (file_extent == (u64)-1) {
1322                         printf("corrupting inode\n");
1323                         ret = corrupt_inode(trans, root, inode, field);
1324                 } else {
1325                         printf("corrupting file extent\n");
1326                         ret = corrupt_file_extent(trans, root, inode,
1327                                                   file_extent, field);
1328                 }
1329                 btrfs_commit_transaction(trans, root);
1330                 goto out_close;
1331         }
1332         if (metadata_block) {
1333                 if (*field == 0)
1334                         print_usage(1);
1335                 ret = corrupt_metadata_block(root->fs_info, metadata_block,
1336                                              field);
1337                 goto out_close;
1338         }
1339         if (corrupt_di) {
1340                 if (!key.objectid || *field == 0)
1341                         print_usage(1);
1342                 ret = corrupt_dir_item(target_root, &key, field);
1343                 goto out_close;
1344         }
1345         if (csum_bytenr) {
1346                 ret = delete_csum(root, csum_bytenr, bytes);
1347                 goto out_close;
1348         }
1349         if (corrupt_item) {
1350                 if (!key.objectid)
1351                         print_usage(1);
1352                 if (!root_objectid)
1353                         print_usage(1);
1354
1355                 ret = corrupt_btrfs_item(target_root, &key, field);
1356                 goto out_close;
1357         }
1358         if (delete) {
1359                 if (!key.objectid)
1360                         print_usage(1);
1361
1362                 ret = delete_item(target_root, &key);
1363                 goto out_close;
1364         }
1365         if (should_corrupt_key) {
1366                 if (*field == 0)
1367                         print_usage(1);
1368
1369                 ret = corrupt_key(target_root, &key, field);
1370                 goto out_close;
1371         }
1372         /*
1373          * If we made it here and we have extent set then we didn't specify
1374          * inode and we're screwed.
1375          */
1376         if (file_extent != (u64)-1)
1377                 print_usage(1);
1378
1379         if (logical == (u64)-1)
1380                 print_usage(1);
1381
1382         if (bytes == 0)
1383                 bytes = root->fs_info->sectorsize;
1384
1385         bytes = round_up(bytes, root->fs_info->sectorsize);
1386
1387         while (bytes > 0) {
1388                 if (corrupt_block_keys) {
1389                         corrupt_keys_in_block(root->fs_info, logical);
1390                 } else {
1391                         struct extent_buffer *eb;
1392
1393                         eb = btrfs_find_create_tree_block(root->fs_info,
1394                                         logical);
1395                         if (!eb) {
1396                                 error(
1397                 "not enough memory to allocate extent buffer for bytenr %llu",
1398                                         (unsigned long long)logical);
1399                                 ret = 1;
1400                                 goto out_close;
1401                         }
1402
1403                         debug_corrupt_block(eb, root, logical,
1404                                             root->fs_info->sectorsize, copy);
1405                         free_extent_buffer(eb);
1406                 }
1407                 logical += root->fs_info->sectorsize;
1408                 bytes -= root->fs_info->sectorsize;
1409         }
1410         return ret;
1411 out_close:
1412         close_ctree(root);
1413         return ret;
1414 }