2 * Copyright (C) 2009 Oracle. All rights reserved.
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.
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.
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.
26 #include "kerncompat.h"
30 #include "print-tree.h"
31 #include "transaction.h"
36 #define FIELD_BUF_LEN 80
38 static int debug_corrupt_block(struct extent_buffer *eb,
39 struct btrfs_root *root, u64 bytenr, u32 blocksize, u64 copy)
43 struct btrfs_multi_bio *multi = NULL;
44 struct btrfs_device *device;
50 ret = btrfs_map_block(root->fs_info, READ, eb->start, &length,
51 &multi, mirror_num, NULL);
53 error("cannot map block %llu length %llu mirror %d: %d",
54 (unsigned long long)eb->start,
55 (unsigned long long)length,
59 device = multi->stripes[0].dev;
62 eb->dev_bytenr = multi->stripes[0].physical;
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);
70 if (!copy || mirror_num == copy) {
71 ret = read_extent_from_disk(eb, 0, eb->len);
73 error("cannot read eb bytenr %llu: %s",
74 (unsigned long long)eb->dev_bytenr,
78 printf("corrupting %llu copy %d\n", eb->start,
80 memset(eb->data, 0, eb->len);
81 ret = write_extent_to_disk(eb);
83 error("cannot write eb bytenr %llu: %s",
84 (unsigned long long)eb->dev_bytenr,
91 num_copies = btrfs_num_copies(root->fs_info, eb->start,
97 if (mirror_num > num_copies)
104 static void print_usage(int ret)
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 The key to corrupt in the format <num>,<num>,<num> (must also specify -f for the field)\n");
118 printf("\t-f The field in the item to corrupt\n");
119 printf("\t-I An item to corrupt (must also specify the field to corrupt and a root+key for the item)\n");
120 printf("\t-D Corrupt a dir item, must specify key and field\n");
121 printf("\t-d Delete this item (must specify -K)\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");
127 static void corrupt_keys(struct btrfs_trans_handle *trans,
128 struct btrfs_fs_info *fs_info,
129 struct extent_buffer *eb)
134 struct btrfs_disk_key bad_key;;
136 nr = btrfs_header_nritems(eb);
140 slot = rand_range(nr);
141 bad_slot = rand_range(nr);
143 if (bad_slot == slot)
147 "corrupting keys in block %llu slot %d swapping with %d\n",
148 (unsigned long long)eb->start, slot, bad_slot);
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);
154 btrfs_node_key(eb, &bad_key, bad_slot);
155 btrfs_set_node_key(eb, &bad_key, slot);
157 btrfs_mark_buffer_dirty(eb);
160 btrfs_super_csum_size(fs_info->super_copy);
161 csum_tree_block_size(eb, csum_size, 0);
162 write_extent_to_disk(eb);
167 static int corrupt_keys_in_block(struct btrfs_fs_info *fs_info, u64 bytenr)
169 struct extent_buffer *eb;
171 eb = read_tree_block(fs_info, bytenr, fs_info->nodesize, 0);
172 if (!extent_buffer_uptodate(eb))
175 corrupt_keys(NULL, fs_info, eb);
176 free_extent_buffer(eb);
180 static int corrupt_extent(struct btrfs_trans_handle *trans,
181 struct btrfs_root *root, u64 bytenr)
183 struct btrfs_key key;
184 struct extent_buffer *leaf;
187 struct btrfs_path *path;
190 int should_del = rand_range(3);
192 path = btrfs_alloc_path();
196 key.objectid = bytenr;
198 key.offset = (u64)-1;
201 ret = btrfs_search_slot(trans, root->fs_info->extent_root,
207 if (path->slots[0] == 0)
212 leaf = path->nodes[0];
213 slot = path->slots[0];
214 btrfs_item_key_to_cpu(leaf, &key, slot);
215 if (key.objectid != bytenr)
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)
229 "deleting extent record: key %llu %u %llu\n",
230 key.objectid, key.type, key.offset);
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);
239 btrfs_del_item(trans, root, path);
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);
250 btrfs_release_path(path);
258 btrfs_free_path(path);
262 static void btrfs_corrupt_extent_leaf(struct btrfs_trans_handle *trans,
263 struct btrfs_root *root,
264 struct extent_buffer *eb)
266 u32 nr = btrfs_header_nritems(eb);
267 u32 victim = rand_range(nr);
269 struct btrfs_key key;
271 btrfs_item_key_to_cpu(eb, &key, victim);
272 objectid = key.objectid;
273 corrupt_extent(trans, root, objectid);
276 static void btrfs_corrupt_extent_tree(struct btrfs_trans_handle *trans,
277 struct btrfs_root *root,
278 struct extent_buffer *eb)
280 struct btrfs_fs_info *fs_info = root->fs_info;
286 if (btrfs_is_leaf(eb)) {
287 btrfs_corrupt_extent_leaf(trans, root, eb);
291 if (btrfs_header_level(eb) == 1 && eb != root->node) {
296 for (i = 0; i < btrfs_header_nritems(eb); i++) {
297 struct extent_buffer *next;
299 next = read_tree_block(fs_info, btrfs_node_blockptr(eb, i),
301 btrfs_node_ptr_generation(eb, i));
302 if (!extent_buffer_uptodate(next))
304 btrfs_corrupt_extent_tree(trans, root, next);
305 free_extent_buffer(next);
309 enum btrfs_inode_field {
310 BTRFS_INODE_FIELD_ISIZE,
311 BTRFS_INODE_FIELD_NBYTES,
312 BTRFS_INODE_FIELD_NLINK,
313 BTRFS_INODE_FIELD_GENERATION,
314 BTRFS_INODE_FIELD_TRANSID,
315 BTRFS_INODE_FIELD_BLOCK_GROUP,
316 BTRFS_INODE_FIELD_MODE,
317 BTRFS_INODE_FIELD_UID,
318 BTRFS_INODE_FIELD_GID,
319 BTRFS_INODE_FIELD_BAD,
322 enum btrfs_file_extent_field {
323 BTRFS_FILE_EXTENT_DISK_BYTENR,
324 BTRFS_FILE_EXTENT_BAD,
327 enum btrfs_dir_item_field {
329 BTRFS_DIR_ITEM_LOCATION_OBJECTID,
333 enum btrfs_metadata_block_field {
334 BTRFS_METADATA_BLOCK_GENERATION,
335 BTRFS_METADATA_BLOCK_SHIFT_ITEMS,
336 BTRFS_METADATA_BLOCK_BAD,
339 enum btrfs_item_field {
344 enum btrfs_key_field {
351 static enum btrfs_inode_field convert_inode_field(char *field)
353 if (!strncmp(field, "isize", FIELD_BUF_LEN))
354 return BTRFS_INODE_FIELD_ISIZE;
355 if (!strncmp(field, "nbytes", FIELD_BUF_LEN))
356 return BTRFS_INODE_FIELD_NBYTES;
357 if (!strncmp(field, "nlink", FIELD_BUF_LEN))
358 return BTRFS_INODE_FIELD_NLINK;
359 if (!strncmp(field, "generation", FIELD_BUF_LEN))
360 return BTRFS_INODE_FIELD_GENERATION;
361 if (!strncmp(field, "transid", FIELD_BUF_LEN))
362 return BTRFS_INODE_FIELD_TRANSID;
363 if (!strncmp(field, "block_group", FIELD_BUF_LEN))
364 return BTRFS_INODE_FIELD_BLOCK_GROUP;
365 if (!strncmp(field, "mode", FIELD_BUF_LEN))
366 return BTRFS_INODE_FIELD_MODE;
367 if (!strncmp(field, "uid", FIELD_BUF_LEN))
368 return BTRFS_INODE_FIELD_UID;
369 if (!strncmp(field, "gid", FIELD_BUF_LEN))
370 return BTRFS_INODE_FIELD_GID;
371 return BTRFS_INODE_FIELD_BAD;
374 static enum btrfs_file_extent_field convert_file_extent_field(char *field)
376 if (!strncmp(field, "disk_bytenr", FIELD_BUF_LEN))
377 return BTRFS_FILE_EXTENT_DISK_BYTENR;
378 return BTRFS_FILE_EXTENT_BAD;
381 static enum btrfs_metadata_block_field
382 convert_metadata_block_field(char *field)
384 if (!strncmp(field, "generation", FIELD_BUF_LEN))
385 return BTRFS_METADATA_BLOCK_GENERATION;
386 if (!strncmp(field, "shift_items", FIELD_BUF_LEN))
387 return BTRFS_METADATA_BLOCK_SHIFT_ITEMS;
388 return BTRFS_METADATA_BLOCK_BAD;
391 static enum btrfs_key_field convert_key_field(char *field)
393 if (!strncmp(field, "objectid", FIELD_BUF_LEN))
394 return BTRFS_KEY_OBJECTID;
395 if (!strncmp(field, "type", FIELD_BUF_LEN))
396 return BTRFS_KEY_TYPE;
397 if (!strncmp(field, "offset", FIELD_BUF_LEN))
398 return BTRFS_KEY_OFFSET;
399 return BTRFS_KEY_BAD;
402 static enum btrfs_item_field convert_item_field(char *field)
404 if (!strncmp(field, "offset", FIELD_BUF_LEN))
405 return BTRFS_ITEM_OFFSET;
406 return BTRFS_ITEM_BAD;
409 static enum btrfs_dir_item_field convert_dir_item_field(char *field)
411 if (!strncmp(field, "name", FIELD_BUF_LEN))
412 return BTRFS_DIR_ITEM_NAME;
413 if (!strncmp(field, "location_objectid", FIELD_BUF_LEN))
414 return BTRFS_DIR_ITEM_LOCATION_OBJECTID;
415 return BTRFS_DIR_ITEM_BAD;
418 static u64 generate_u64(u64 orig)
423 } while (ret == orig);
427 static u32 generate_u32(u32 orig)
432 } while (ret == orig);
436 static u8 generate_u8(u8 orig)
441 } while (ret == orig);
445 static int corrupt_key(struct btrfs_root *root, struct btrfs_key *key,
448 enum btrfs_key_field corrupt_field = convert_key_field(field);
449 struct btrfs_path *path;
450 struct btrfs_trans_handle *trans;
453 root = root->fs_info->fs_root;
454 if (corrupt_field == BTRFS_KEY_BAD) {
455 fprintf(stderr, "Invalid field %s\n", field);
459 path = btrfs_alloc_path();
463 trans = btrfs_start_transaction(root, 1);
465 btrfs_free_path(path);
466 return PTR_ERR(trans);
469 ret = btrfs_search_slot(trans, root, key, path, 0, 1);
473 fprintf(stderr, "Couldn't find the key to corrupt\n");
478 switch (corrupt_field) {
479 case BTRFS_KEY_OBJECTID:
480 key->objectid = generate_u64(key->objectid);
483 key->type = generate_u8(key->type);
485 case BTRFS_KEY_OFFSET:
486 key->offset = generate_u64(key->objectid);
489 fprintf(stderr, "Invalid field %s, %d\n", field,
495 btrfs_set_item_key_unsafe(root, path, key);
497 btrfs_free_path(path);
498 btrfs_commit_transaction(trans, root);
502 static int corrupt_dir_item(struct btrfs_root *root, struct btrfs_key *key,
505 struct btrfs_trans_handle *trans;
506 struct btrfs_dir_item *di;
507 struct btrfs_path *path;
509 struct btrfs_key location;
510 struct btrfs_disk_key disk_key;
511 unsigned long name_ptr;
512 enum btrfs_dir_item_field corrupt_field =
513 convert_dir_item_field(field);
518 if (corrupt_field == BTRFS_DIR_ITEM_BAD) {
519 fprintf(stderr, "Invalid field %s\n", field);
523 path = btrfs_alloc_path();
527 trans = btrfs_start_transaction(root, 1);
529 btrfs_free_path(path);
530 return PTR_ERR(trans);
533 ret = btrfs_search_slot(trans, root, key, path, 0, 1);
537 fprintf(stderr, "Error searching for dir item %d\n", ret);
541 di = btrfs_item_ptr(path->nodes[0], path->slots[0],
542 struct btrfs_dir_item);
544 switch (corrupt_field) {
545 case BTRFS_DIR_ITEM_NAME:
546 name_len = btrfs_dir_name_len(path->nodes[0], di);
547 name_ptr = (unsigned long)(di + 1);
548 read_extent_buffer(path->nodes[0], name, name_ptr, name_len);
550 write_extent_buffer(path->nodes[0], name, name_ptr, name_len);
551 btrfs_mark_buffer_dirty(path->nodes[0]);
553 case BTRFS_DIR_ITEM_LOCATION_OBJECTID:
554 btrfs_dir_item_key_to_cpu(path->nodes[0], di, &location);
555 bogus = generate_u64(location.objectid);
556 location.objectid = bogus;
557 btrfs_cpu_key_to_disk(&disk_key, &location);
558 btrfs_set_dir_item_key(path->nodes[0], di, &disk_key);
559 btrfs_mark_buffer_dirty(path->nodes[0]);
566 btrfs_commit_transaction(trans, root);
567 btrfs_free_path(path);
571 static int corrupt_inode(struct btrfs_trans_handle *trans,
572 struct btrfs_root *root, u64 inode, char *field)
574 struct btrfs_inode_item *ei;
575 struct btrfs_path *path;
576 struct btrfs_key key;
577 enum btrfs_inode_field corrupt_field = convert_inode_field(field);
582 if (corrupt_field == BTRFS_INODE_FIELD_BAD) {
583 fprintf(stderr, "Invalid field %s\n", field);
587 key.objectid = inode;
588 key.type = BTRFS_INODE_ITEM_KEY;
589 key.offset = (u64)-1;
591 path = btrfs_alloc_path();
595 ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
599 if (!path->slots[0]) {
600 fprintf(stderr, "Couldn't find inode %Lu\n", inode);
608 btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
609 if (key.objectid != inode) {
610 fprintf(stderr, "Couldn't find inode %Lu\n", inode);
615 ei = btrfs_item_ptr(path->nodes[0], path->slots[0],
616 struct btrfs_inode_item);
617 switch (corrupt_field) {
618 case BTRFS_INODE_FIELD_ISIZE:
619 orig = btrfs_inode_size(path->nodes[0], ei);
620 bogus = generate_u64(orig);
621 btrfs_set_inode_size(path->nodes[0], ei, bogus);
623 case BTRFS_INODE_FIELD_NBYTES:
624 orig = btrfs_inode_nbytes(path->nodes[0], ei);
625 bogus = generate_u64(orig);
626 btrfs_set_inode_nbytes(path->nodes[0], ei, bogus);
628 case BTRFS_INODE_FIELD_NLINK:
629 orig = btrfs_inode_nlink(path->nodes[0], ei);
630 bogus = generate_u32(orig);
631 btrfs_set_inode_nlink(path->nodes[0], ei, bogus);
633 case BTRFS_INODE_FIELD_GENERATION:
634 orig = btrfs_inode_generation(path->nodes[0], ei);
635 bogus = generate_u64(orig);
636 btrfs_set_inode_generation(path->nodes[0], ei, bogus);
638 case BTRFS_INODE_FIELD_TRANSID:
639 orig = btrfs_inode_transid(path->nodes[0], ei);
640 bogus = generate_u64(orig);
641 btrfs_set_inode_transid(path->nodes[0], ei, bogus);
643 case BTRFS_INODE_FIELD_BLOCK_GROUP:
644 orig = btrfs_inode_block_group(path->nodes[0], ei);
645 bogus = generate_u64(orig);
646 btrfs_set_inode_block_group(path->nodes[0], ei, bogus);
648 case BTRFS_INODE_FIELD_MODE:
649 orig = btrfs_inode_mode(path->nodes[0], ei);
650 bogus = generate_u32(orig);
651 btrfs_set_inode_mode(path->nodes[0], ei, bogus);
653 case BTRFS_INODE_FIELD_UID:
654 orig = btrfs_inode_uid(path->nodes[0], ei);
655 bogus = generate_u32(orig);
656 btrfs_set_inode_uid(path->nodes[0], ei, bogus);
658 case BTRFS_INODE_FIELD_GID:
659 orig = btrfs_inode_gid(path->nodes[0], ei);
660 bogus = generate_u32(orig);
661 btrfs_set_inode_gid(path->nodes[0], ei, bogus);
667 btrfs_mark_buffer_dirty(path->nodes[0]);
669 btrfs_free_path(path);
673 static int corrupt_file_extent(struct btrfs_trans_handle *trans,
674 struct btrfs_root *root, u64 inode, u64 extent,
677 struct btrfs_file_extent_item *fi;
678 struct btrfs_path *path;
679 struct btrfs_key key;
680 enum btrfs_file_extent_field corrupt_field;
685 corrupt_field = convert_file_extent_field(field);
686 if (corrupt_field == BTRFS_FILE_EXTENT_BAD) {
687 fprintf(stderr, "Invalid field %s\n", field);
691 key.objectid = inode;
692 key.type = BTRFS_EXTENT_DATA_KEY;
695 path = btrfs_alloc_path();
699 ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
703 fprintf(stderr, "Couldn't find extent %llu for inode %llu\n",
709 fi = btrfs_item_ptr(path->nodes[0], path->slots[0],
710 struct btrfs_file_extent_item);
711 switch (corrupt_field) {
712 case BTRFS_FILE_EXTENT_DISK_BYTENR:
713 orig = btrfs_file_extent_disk_bytenr(path->nodes[0], fi);
714 bogus = generate_u64(orig);
715 btrfs_set_file_extent_disk_bytenr(path->nodes[0], fi, bogus);
721 btrfs_mark_buffer_dirty(path->nodes[0]);
723 btrfs_free_path(path);
727 static void shift_items(struct btrfs_root *root, struct extent_buffer *eb)
729 int nritems = btrfs_header_nritems(eb);
730 int shift_space = btrfs_leaf_free_space(root, eb) / 2;
731 int slot = nritems / 2;
733 unsigned int data_end = btrfs_item_offset_nr(eb, nritems - 1);
735 /* Shift the item data up to and including slot back by shift space */
736 memmove_extent_buffer(eb, btrfs_leaf_data(eb) + data_end - shift_space,
737 btrfs_leaf_data(eb) + data_end,
738 btrfs_item_offset_nr(eb, slot - 1) - data_end);
740 /* Now update the item pointers. */
741 for (i = nritems - 1; i >= slot; i--) {
742 u32 offset = btrfs_item_offset_nr(eb, i);
743 offset -= shift_space;
744 btrfs_set_item_offset(eb, btrfs_item_nr(i), offset);
748 static int corrupt_metadata_block(struct btrfs_fs_info *fs_info, u64 block,
751 struct btrfs_trans_handle *trans;
752 struct btrfs_root *root;
753 struct btrfs_path *path;
754 struct extent_buffer *eb;
755 struct btrfs_key key, root_key;
756 enum btrfs_metadata_block_field corrupt_field;
762 corrupt_field = convert_metadata_block_field(field);
763 if (corrupt_field == BTRFS_METADATA_BLOCK_BAD) {
764 fprintf(stderr, "Invalid field %s\n", field);
768 eb = read_tree_block(fs_info, block, fs_info->nodesize, 0);
769 if (!extent_buffer_uptodate(eb)) {
770 fprintf(stderr, "Couldn't read in tree block %s\n", field);
773 root_objectid = btrfs_header_owner(eb);
774 level = btrfs_header_level(eb);
776 btrfs_node_key_to_cpu(eb, &key, 0);
778 btrfs_item_key_to_cpu(eb, &key, 0);
779 free_extent_buffer(eb);
781 root_key.objectid = root_objectid;
782 root_key.type = BTRFS_ROOT_ITEM_KEY;
783 root_key.offset = (u64)-1;
785 root = btrfs_read_fs_root(fs_info, &root_key);
787 fprintf(stderr, "Couldn't find owner root %llu\n",
789 return PTR_ERR(root);
792 path = btrfs_alloc_path();
796 trans = btrfs_start_transaction(root, 1);
798 btrfs_free_path(path);
799 fprintf(stderr, "Couldn't start transaction %ld\n",
801 return PTR_ERR(trans);
804 path->lowest_level = level;
805 ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
807 fprintf(stderr, "Error searching to node %d\n", ret);
810 eb = path->nodes[level];
813 switch (corrupt_field) {
814 case BTRFS_METADATA_BLOCK_GENERATION:
815 orig = btrfs_header_generation(eb);
816 bogus = generate_u64(orig);
817 btrfs_set_header_generation(eb, bogus);
819 case BTRFS_METADATA_BLOCK_SHIFT_ITEMS:
820 shift_items(root, path->nodes[level]);
826 btrfs_mark_buffer_dirty(path->nodes[level]);
828 btrfs_commit_transaction(trans, root);
829 btrfs_free_path(path);
833 static int corrupt_btrfs_item(struct btrfs_root *root, struct btrfs_key *key,
836 struct btrfs_trans_handle *trans;
837 struct btrfs_path *path;
838 enum btrfs_item_field corrupt_field;
842 corrupt_field = convert_item_field(field);
843 if (corrupt_field == BTRFS_ITEM_BAD) {
844 fprintf(stderr, "Invalid field %s\n", field);
848 path = btrfs_alloc_path();
852 trans = btrfs_start_transaction(root, 1);
854 btrfs_free_path(path);
855 fprintf(stderr, "Couldn't start transaction %ld\n",
857 return PTR_ERR(trans);
860 ret = btrfs_search_slot(trans, root, key, path, 0, 1);
862 fprintf(stderr, "Error searching to node %d\n", ret);
867 switch (corrupt_field) {
868 case BTRFS_ITEM_OFFSET:
869 orig = btrfs_item_offset_nr(path->nodes[0], path->slots[0]);
870 bogus = generate_u32(orig);
871 btrfs_set_item_offset(path->nodes[0],
872 btrfs_item_nr(path->slots[0]), bogus);
878 btrfs_mark_buffer_dirty(path->nodes[0]);
880 btrfs_commit_transaction(trans, root);
881 btrfs_free_path(path);
885 static int delete_item(struct btrfs_root *root, struct btrfs_key *key)
887 struct btrfs_trans_handle *trans;
888 struct btrfs_path *path;
891 path = btrfs_alloc_path();
895 trans = btrfs_start_transaction(root, 1);
897 btrfs_free_path(path);
898 fprintf(stderr, "Couldn't start transaction %ld\n",
900 return PTR_ERR(trans);
903 ret = btrfs_search_slot(trans, root, key, path, -1, 1);
907 fprintf(stderr, "Error searching to node %d\n", ret);
910 ret = btrfs_del_item(trans, root, path);
911 btrfs_mark_buffer_dirty(path->nodes[0]);
913 btrfs_commit_transaction(trans, root);
914 btrfs_free_path(path);
918 static int delete_csum(struct btrfs_root *root, u64 bytenr, u64 bytes)
920 struct btrfs_trans_handle *trans;
923 root = root->fs_info->csum_root;
924 trans = btrfs_start_transaction(root, 1);
926 fprintf(stderr, "Couldn't start transaction %ld\n",
928 return PTR_ERR(trans);
931 ret = btrfs_del_csums(trans, root, bytenr, bytes);
933 fprintf(stderr, "Error deleting csums %d\n", ret);
934 btrfs_commit_transaction(trans, root);
938 /* corrupt item using NO cow.
939 * Because chunk recover will recover based on whole partition scanning,
940 * If using COW, chunk recover will use the old item to recover,
941 * which is still OK but we want to check the ability to rebuild chunk
942 * not only restore the old ones */
943 static int corrupt_item_nocow(struct btrfs_trans_handle *trans,
944 struct btrfs_root *root, struct btrfs_path *path,
948 struct btrfs_key key;
949 struct extent_buffer *leaf;
954 leaf = path->nodes[0];
955 slot = path->slots[0];
956 /* Not deleting the first item of a leaf to keep leaf structure */
959 /* Only accept valid eb */
960 if (slot >= btrfs_header_nritems(leaf)) {
961 error("invalid eb: no data or slot out of range: %d >= %d",
962 slot, btrfs_header_nritems(leaf));
965 btrfs_item_key_to_cpu(leaf, &key, slot);
967 fprintf(stdout, "Deleting key and data [%llu, %u, %llu].\n",
968 key.objectid, key.type, key.offset);
969 btrfs_del_item(trans, root, path);
971 fprintf(stdout, "Corrupting key and data [%llu, %u, %llu].\n",
972 key.objectid, key.type, key.offset);
973 ptr = btrfs_item_ptr_offset(leaf, slot);
974 item_size = btrfs_item_size_nr(leaf, slot);
975 memset_extent_buffer(leaf, 0, ptr, item_size);
976 btrfs_mark_buffer_dirty(leaf);
980 static int corrupt_chunk_tree(struct btrfs_trans_handle *trans,
981 struct btrfs_root *root)
986 struct btrfs_path *path;
987 struct btrfs_key key;
988 struct btrfs_key found_key;
989 struct extent_buffer *leaf;
991 path = btrfs_alloc_path();
995 key.objectid = (u64)-1;
996 key.offset = (u64)-1;
999 /* Here, cow and ins_len must equals 0 for the following reasons:
1000 * 1) chunk recover is based on disk scanning, so COW should be
1001 * disabled in case the original chunk being scanned and
1002 * recovered using the old chunk.
1003 * 2) if cow = 0, ins_len must also be set to 0, or BUG_ON will be
1006 ret = btrfs_search_slot(trans, root, &key, path, 0, 0);
1009 fprintf(stderr, "Error searching tree\n");
1012 /* corrupt/del dev_item first */
1013 while (!btrfs_previous_item(root, path, 0, BTRFS_DEV_ITEM_KEY)) {
1014 slot = path->slots[0];
1015 leaf = path->nodes[0];
1016 del = rand_range(3);
1017 /* Never delete the first item to keep the leaf structure */
1018 if (path->slots[0] == 0)
1020 ret = corrupt_item_nocow(trans, root, path, del);
1024 btrfs_release_path(path);
1026 /* Here, cow and ins_len must equals 0 for the following reasons:
1027 * 1) chunk recover is based on disk scanning, so COW should be
1028 * disabled in case the original chunk being scanned and
1029 * recovered using the old chunk.
1030 * 2) if cow = 0, ins_len must also be set to 0, or BUG_ON will be
1033 ret = btrfs_search_slot(trans, root, &key, path, 0, 0);
1036 fprintf(stderr, "Error searching tree\n");
1039 /* corrupt/del chunk then*/
1040 while (!btrfs_previous_item(root, path, 0, BTRFS_CHUNK_ITEM_KEY)) {
1041 slot = path->slots[0];
1042 leaf = path->nodes[0];
1043 del = rand_range(3);
1044 btrfs_item_key_to_cpu(leaf, &found_key, slot);
1045 ret = corrupt_item_nocow(trans, root, path, del);
1050 btrfs_free_path(path);
1053 static int find_chunk_offset(struct btrfs_root *root,
1054 struct btrfs_path *path, u64 offset)
1056 struct btrfs_key key;
1059 key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
1060 key.type = BTRFS_CHUNK_ITEM_KEY;
1061 key.offset = offset;
1063 /* Here, cow and ins_len must equals 0 for following reasons:
1064 * 1) chunk recover is based on disk scanning, so COW should
1065 * be disabled in case the original chunk being scanned
1066 * and recovered using the old chunk.
1067 * 2) if cow = 0, ins_len must also be set to 0, or BUG_ON
1068 * will be triggered.
1070 ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
1072 fprintf(stderr, "Can't find chunk with given offset %llu\n",
1077 fprintf(stderr, "Error searching chunk\n");
1084 int main(int argc, char **argv)
1086 struct cache_tree root_cache;
1087 struct btrfs_key key;
1088 struct btrfs_root *root;
1090 /* chunk offset can be 0,so change to (u64)-1 */
1091 u64 logical = (u64)-1;
1096 int extent_tree = 0;
1097 int corrupt_block_keys = 0;
1100 int corrupt_item = 0;
1103 u64 metadata_block = 0;
1105 u64 file_extent = (u64)-1;
1106 u64 root_objectid = 0;
1107 u64 csum_bytenr = 0;
1108 char field[FIELD_BUF_LEN];
1111 memset(&key, 0, sizeof(key));
1115 static const struct option long_options[] = {
1116 /* { "byte-count", 1, NULL, 'b' }, */
1117 { "logical", required_argument, NULL, 'l' },
1118 { "copy", required_argument, NULL, 'c' },
1119 { "bytes", required_argument, NULL, 'b' },
1120 { "extent-record", no_argument, NULL, 'e' },
1121 { "extent-tree", no_argument, NULL, 'E' },
1122 { "keys", no_argument, NULL, 'k' },
1123 { "chunk-record", no_argument, NULL, 'u' },
1124 { "chunk-tree", no_argument, NULL, 'U' },
1125 { "inode", required_argument, NULL, 'i'},
1126 { "file-extent", required_argument, NULL, 'x'},
1127 { "metadata-block", required_argument, NULL, 'm'},
1128 { "field", required_argument, NULL, 'f'},
1129 { "key", required_argument, NULL, 'K'},
1130 { "item", no_argument, NULL, 'I'},
1131 { "dir-item", no_argument, NULL, 'D'},
1132 { "delete", no_argument, NULL, 'd'},
1133 { "root", no_argument, NULL, 'r'},
1134 { "csum", required_argument, NULL, 'C'},
1135 { "help", no_argument, NULL, GETOPT_VAL_HELP},
1136 { NULL, 0, NULL, 0 }
1139 c = getopt_long(argc, argv, "l:c:b:eEkuUi:f:x:m:K:IDdr:C:",
1140 long_options, NULL);
1145 logical = arg_strtou64(optarg);
1148 copy = arg_strtou64(optarg);
1151 bytes = arg_strtou64(optarg);
1160 corrupt_block_keys = 1;
1169 inode = arg_strtou64(optarg);
1172 strncpy(field, optarg, FIELD_BUF_LEN);
1175 file_extent = arg_strtou64(optarg);
1178 metadata_block = arg_strtou64(optarg);
1181 ret = sscanf(optarg, "%llu,%u,%llu",
1183 (unsigned int *)&key.type,
1186 fprintf(stderr, "error reading key "
1201 root_objectid = arg_strtou64(optarg);
1204 csum_bytenr = arg_strtou64(optarg);
1206 case GETOPT_VAL_HELP:
1208 print_usage(c != GETOPT_VAL_HELP);
1212 if (check_argc_min(argc - optind, 1))
1217 cache_tree_init(&root_cache);
1219 root = open_ctree(dev, 0, OPEN_CTREE_WRITES);
1221 fprintf(stderr, "Open ctree failed\n");
1225 struct btrfs_trans_handle *trans;
1227 if (logical == (u64)-1)
1229 trans = btrfs_start_transaction(root, 1);
1230 ret = corrupt_extent(trans, root, logical);
1231 btrfs_commit_transaction(trans, root);
1235 struct btrfs_trans_handle *trans;
1236 trans = btrfs_start_transaction(root, 1);
1237 btrfs_corrupt_extent_tree(trans, root->fs_info->extent_root,
1238 root->fs_info->extent_root->node);
1239 btrfs_commit_transaction(trans, root);
1243 struct btrfs_trans_handle *trans;
1244 struct btrfs_path *path;
1247 if (logical == (u64)-1)
1249 del = rand_range(3);
1250 path = btrfs_alloc_path();
1252 fprintf(stderr, "path allocation failed\n");
1256 if (find_chunk_offset(root->fs_info->chunk_root, path,
1258 btrfs_free_path(path);
1261 trans = btrfs_start_transaction(root, 1);
1262 ret = corrupt_item_nocow(trans, root->fs_info->chunk_root,
1265 fprintf(stderr, "Failed to corrupt chunk record\n");
1266 btrfs_commit_transaction(trans, root);
1270 struct btrfs_trans_handle *trans;
1271 trans = btrfs_start_transaction(root, 1);
1272 ret = corrupt_chunk_tree(trans, root->fs_info->chunk_root);
1274 fprintf(stderr, "Failed to corrupt chunk tree\n");
1275 btrfs_commit_transaction(trans, root);
1279 struct btrfs_trans_handle *trans;
1284 trans = btrfs_start_transaction(root, 1);
1285 if (file_extent == (u64)-1) {
1286 printf("corrupting inode\n");
1287 ret = corrupt_inode(trans, root, inode, field);
1289 printf("corrupting file extent\n");
1290 ret = corrupt_file_extent(trans, root, inode,
1291 file_extent, field);
1293 btrfs_commit_transaction(trans, root);
1296 if (metadata_block) {
1299 ret = corrupt_metadata_block(root->fs_info, metadata_block,
1304 if (!key.objectid || *field == 0)
1306 ret = corrupt_dir_item(root, &key, field);
1310 ret = delete_csum(root, csum_bytenr, bytes);
1316 ret = corrupt_btrfs_item(root, &key, field);
1319 struct btrfs_root *target = root;
1323 if (root_objectid) {
1324 struct btrfs_key root_key;
1326 root_key.objectid = root_objectid;
1327 root_key.type = BTRFS_ROOT_ITEM_KEY;
1328 root_key.offset = (u64)-1;
1330 target = btrfs_read_fs_root(root->fs_info, &root_key);
1331 if (IS_ERR(target)) {
1332 fprintf(stderr, "Couldn't find root %llu\n",
1333 (unsigned long long)root_objectid);
1337 ret = delete_item(target, &key);
1340 if (key.objectid || key.offset || key.type) {
1343 ret = corrupt_key(root, &key, field);
1347 * If we made it here and we have extent set then we didn't specify
1348 * inode and we're screwed.
1350 if (file_extent != (u64)-1)
1353 if (logical == (u64)-1)
1357 bytes = root->fs_info->sectorsize;
1359 bytes = round_up(bytes, root->fs_info->sectorsize);
1362 if (corrupt_block_keys) {
1363 corrupt_keys_in_block(root->fs_info, logical);
1365 struct extent_buffer *eb;
1367 eb = btrfs_find_create_tree_block(root->fs_info,
1368 logical, root->fs_info->sectorsize);
1371 "not enough memory to allocate extent buffer for bytenr %llu",
1372 (unsigned long long)logical);
1377 debug_corrupt_block(eb, root, logical,
1378 root->fs_info->sectorsize, copy);
1379 free_extent_buffer(eb);
1381 logical += root->fs_info->sectorsize;
1382 bytes -= root->fs_info->sectorsize;