X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=btrfs-corrupt-block.c;h=59ee1b45922e986c8db469d98570b774011580f6;hb=905b3d18ae118931839b0a1ece17870073b51484;hp=f2cc42c72384f264d8776bbf9d6babc3df0f2a9c;hpb=e4a2d99dfee4c88f8c4c0d5aac8d92212bf0dddd;p=platform%2Fupstream%2Fbtrfs-progs.git diff --git a/btrfs-corrupt-block.c b/btrfs-corrupt-block.c index f2cc42c..59ee1b4 100644 --- a/btrfs-corrupt-block.c +++ b/btrfs-corrupt-block.c @@ -31,10 +31,11 @@ #include "transaction.h" #include "list.h" #include "utils.h" +#include "help.h" #define FIELD_BUF_LEN 80 -static void debug_corrupt_block(struct extent_buffer *eb, +static int debug_corrupt_block(struct extent_buffer *eb, struct btrfs_root *root, u64 bytenr, u32 blocksize, u64 copy) { int ret; @@ -46,10 +47,15 @@ static void debug_corrupt_block(struct extent_buffer *eb, length = blocksize; while (1) { - ret = btrfs_map_block(&root->fs_info->mapping_tree, READ, - eb->start, &length, &multi, - mirror_num, NULL); - BUG_ON(ret); + ret = btrfs_map_block(root->fs_info, READ, eb->start, &length, + &multi, mirror_num, NULL); + if (ret) { + error("cannot map block %llu length %llu mirror %d: %d", + (unsigned long long)eb->start, + (unsigned long long)length, + mirror_num, ret); + return ret; + } device = multi->stripes[0].dev; eb->fd = device->fd; device->total_ios++; @@ -59,19 +65,31 @@ static void debug_corrupt_block(struct extent_buffer *eb, "mirror %d logical %llu physical %llu device %s\n", mirror_num, (unsigned long long)bytenr, (unsigned long long)eb->dev_bytenr, device->name); - kfree(multi); + free(multi); if (!copy || mirror_num == copy) { ret = read_extent_from_disk(eb, 0, eb->len); + if (ret < 0) { + error("cannot read eb bytenr %llu: %s", + (unsigned long long)eb->dev_bytenr, + strerror(-ret)); + return ret; + } printf("corrupting %llu copy %d\n", eb->start, mirror_num); memset(eb->data, 0, eb->len); - write_extent_to_disk(eb); + ret = write_extent_to_disk(eb); + if (ret < 0) { + error("cannot write eb bytenr %llu: %s", + (unsigned long long)eb->dev_bytenr, + strerror(-ret)); + return ret; + } fsync(eb->fd); } - num_copies = btrfs_num_copies(&root->fs_info->mapping_tree, - eb->start, eb->len); + num_copies = btrfs_num_copies(root->fs_info, eb->start, + eb->len); if (num_copies == 1) break; @@ -79,41 +97,35 @@ static void debug_corrupt_block(struct extent_buffer *eb, if (mirror_num > num_copies) break; } + + return 0; } static void print_usage(int ret) { - fprintf(stderr, "usage: btrfs-corrupt-block [options] device\n"); - fprintf(stderr, "\t-l Logical extent to be corrupted\n"); - fprintf(stderr, "\t-c Copy of the extent to be corrupted" - " (usually 1 or 2, default: 0)\n"); - fprintf(stderr, "\t-b Number of bytes to be corrupted\n"); - fprintf(stderr, "\t-e Extent to be corrupted\n"); - fprintf(stderr, "\t-E The whole extent tree to be corrupted\n"); - fprintf(stderr, "\t-u Given chunk item to be corrupted\n"); - fprintf(stderr, "\t-U The whole chunk tree to be corrupted\n"); - fprintf(stderr, "\t-i The inode item to corrupt (must also specify " - "the field to corrupt)\n"); - fprintf(stderr, "\t-x The file extent item to corrupt (must also " - "specify -i for the inode and -f for the field to corrupt)\n"); - fprintf(stderr, "\t-m The metadata block to corrupt (must also " - "specify -f for the field to corrupt)\n"); - fprintf(stderr, "\t-K The key to corrupt in the format " - ",, (must also specify -f for the field)\n"); - fprintf(stderr, "\t-f The field in the item to corrupt\n"); - fprintf(stderr, "\t-I An item to corrupt (must also specify the field " - "to corrupt and a root+key for the item)\n"); - fprintf(stderr, "\t-D Corrupt a dir item, must specify key and field\n"); - fprintf(stderr, "\t-d Delete this item (must specify -K)\n"); - fprintf(stderr, "\t-r Operate on this root (only works with -d)\n"); - fprintf(stderr, "\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"); + printf("usage: btrfs-corrupt-block [options] device\n"); + printf("\t-l Logical extent to be corrupted\n"); + printf("\t-c Copy of the extent to be corrupted (usually 1 or 2, default: 0)\n"); + printf("\t-b Number of bytes to be corrupted\n"); + printf("\t-e Extent to be corrupted\n"); + printf("\t-E The whole extent tree to be corrupted\n"); + printf("\t-u Given chunk item to be corrupted\n"); + printf("\t-U The whole chunk tree to be corrupted\n"); + printf("\t-i The inode item to corrupt (must also specify the field to corrupt)\n"); + printf("\t-x The file extent item to corrupt (must also specify -i for the inode and -f for the field to corrupt)\n"); + printf("\t-m The metadata block to corrupt (must also specify -f for the field to corrupt)\n"); + printf("\t-K The key to corrupt in the format ,, (must also specify -f for the field)\n"); + printf("\t-f The field in the item to corrupt\n"); + printf("\t-I An item to corrupt (must also specify the field to corrupt and a root+key for the item)\n"); + printf("\t-D Corrupt a dir item, must specify key and field\n"); + printf("\t-d Delete this item (must specify -K)\n"); + printf("\t-r Operate on this root (only works with -d)\n"); + 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"); exit(ret); } static void corrupt_keys(struct btrfs_trans_handle *trans, - struct btrfs_root *root, + struct btrfs_fs_info *fs_info, struct extent_buffer *eb) { int slot; @@ -145,28 +157,28 @@ static void corrupt_keys(struct btrfs_trans_handle *trans, btrfs_mark_buffer_dirty(eb); if (!trans) { u16 csum_size = - btrfs_super_csum_size(root->fs_info->super_copy); + btrfs_super_csum_size(fs_info->super_copy); csum_tree_block_size(eb, csum_size, 0); write_extent_to_disk(eb); } } -static int corrupt_keys_in_block(struct btrfs_root *root, u64 bytenr) +static int corrupt_keys_in_block(struct btrfs_fs_info *fs_info, u64 bytenr) { struct extent_buffer *eb; - eb = read_tree_block(root, bytenr, root->nodesize, 0); + eb = read_tree_block(fs_info, bytenr, 0); if (!extent_buffer_uptodate(eb)) return -EIO;; - corrupt_keys(NULL, root, eb); + corrupt_keys(NULL, fs_info, eb); free_extent_buffer(eb); return 0; } static int corrupt_extent(struct btrfs_trans_handle *trans, - struct btrfs_root *root, u64 bytenr, u64 copy) + struct btrfs_root *root, u64 bytenr) { struct btrfs_key key; struct extent_buffer *leaf; @@ -258,13 +270,14 @@ static void btrfs_corrupt_extent_leaf(struct btrfs_trans_handle *trans, btrfs_item_key_to_cpu(eb, &key, victim); objectid = key.objectid; - corrupt_extent(trans, root, objectid, 1); + corrupt_extent(trans, root, objectid); } static void btrfs_corrupt_extent_tree(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct extent_buffer *eb) { + struct btrfs_fs_info *fs_info = root->fs_info; int i; if (!eb) @@ -283,8 +296,7 @@ static void btrfs_corrupt_extent_tree(struct btrfs_trans_handle *trans, for (i = 0; i < btrfs_header_nritems(eb); i++) { struct extent_buffer *next; - next = read_tree_block(root, btrfs_node_blockptr(eb, i), - root->nodesize, + next = read_tree_block(fs_info, btrfs_node_blockptr(eb, i), btrfs_node_ptr_generation(eb, i)); if (!extent_buffer_uptodate(next)) continue; @@ -296,6 +308,13 @@ static void btrfs_corrupt_extent_tree(struct btrfs_trans_handle *trans, enum btrfs_inode_field { BTRFS_INODE_FIELD_ISIZE, BTRFS_INODE_FIELD_NBYTES, + BTRFS_INODE_FIELD_NLINK, + BTRFS_INODE_FIELD_GENERATION, + BTRFS_INODE_FIELD_TRANSID, + BTRFS_INODE_FIELD_BLOCK_GROUP, + BTRFS_INODE_FIELD_MODE, + BTRFS_INODE_FIELD_UID, + BTRFS_INODE_FIELD_GID, BTRFS_INODE_FIELD_BAD, }; @@ -334,6 +353,20 @@ static enum btrfs_inode_field convert_inode_field(char *field) return BTRFS_INODE_FIELD_ISIZE; if (!strncmp(field, "nbytes", FIELD_BUF_LEN)) return BTRFS_INODE_FIELD_NBYTES; + if (!strncmp(field, "nlink", FIELD_BUF_LEN)) + return BTRFS_INODE_FIELD_NLINK; + if (!strncmp(field, "generation", FIELD_BUF_LEN)) + return BTRFS_INODE_FIELD_GENERATION; + if (!strncmp(field, "transid", FIELD_BUF_LEN)) + return BTRFS_INODE_FIELD_TRANSID; + if (!strncmp(field, "block_group", FIELD_BUF_LEN)) + return BTRFS_INODE_FIELD_BLOCK_GROUP; + if (!strncmp(field, "mode", FIELD_BUF_LEN)) + return BTRFS_INODE_FIELD_MODE; + if (!strncmp(field, "uid", FIELD_BUF_LEN)) + return BTRFS_INODE_FIELD_UID; + if (!strncmp(field, "gid", FIELD_BUF_LEN)) + return BTRFS_INODE_FIELD_GID; return BTRFS_INODE_FIELD_BAD; } @@ -591,6 +624,41 @@ static int corrupt_inode(struct btrfs_trans_handle *trans, bogus = generate_u64(orig); btrfs_set_inode_nbytes(path->nodes[0], ei, bogus); break; + case BTRFS_INODE_FIELD_NLINK: + orig = btrfs_inode_nlink(path->nodes[0], ei); + bogus = generate_u32(orig); + btrfs_set_inode_nlink(path->nodes[0], ei, bogus); + break; + case BTRFS_INODE_FIELD_GENERATION: + orig = btrfs_inode_generation(path->nodes[0], ei); + bogus = generate_u64(orig); + btrfs_set_inode_generation(path->nodes[0], ei, bogus); + break; + case BTRFS_INODE_FIELD_TRANSID: + orig = btrfs_inode_transid(path->nodes[0], ei); + bogus = generate_u64(orig); + btrfs_set_inode_transid(path->nodes[0], ei, bogus); + break; + case BTRFS_INODE_FIELD_BLOCK_GROUP: + orig = btrfs_inode_block_group(path->nodes[0], ei); + bogus = generate_u64(orig); + btrfs_set_inode_block_group(path->nodes[0], ei, bogus); + break; + case BTRFS_INODE_FIELD_MODE: + orig = btrfs_inode_mode(path->nodes[0], ei); + bogus = generate_u32(orig); + btrfs_set_inode_mode(path->nodes[0], ei, bogus); + break; + case BTRFS_INODE_FIELD_UID: + orig = btrfs_inode_uid(path->nodes[0], ei); + bogus = generate_u32(orig); + btrfs_set_inode_uid(path->nodes[0], ei, bogus); + break; + case BTRFS_INODE_FIELD_GID: + orig = btrfs_inode_gid(path->nodes[0], ei); + bogus = generate_u32(orig); + btrfs_set_inode_gid(path->nodes[0], ei, bogus); + break; default: ret = -EINVAL; break; @@ -676,10 +744,11 @@ static void shift_items(struct btrfs_root *root, struct extent_buffer *eb) } } -static int corrupt_metadata_block(struct btrfs_root *root, u64 block, +static int corrupt_metadata_block(struct btrfs_fs_info *fs_info, u64 block, char *field) { struct btrfs_trans_handle *trans; + struct btrfs_root *root; struct btrfs_path *path; struct extent_buffer *eb; struct btrfs_key key, root_key; @@ -695,7 +764,7 @@ static int corrupt_metadata_block(struct btrfs_root *root, u64 block, return -EINVAL; } - eb = read_tree_block(root, block, root->nodesize, 0); + eb = read_tree_block(fs_info, block, 0); if (!extent_buffer_uptodate(eb)) { fprintf(stderr, "Couldn't read in tree block %s\n", field); return -EINVAL; @@ -712,7 +781,7 @@ static int corrupt_metadata_block(struct btrfs_root *root, u64 block, root_key.type = BTRFS_ROOT_ITEM_KEY; root_key.offset = (u64)-1; - root = btrfs_read_fs_root(root->fs_info, &root_key); + root = btrfs_read_fs_root(fs_info, &root_key); if (IS_ERR(root)) { fprintf(stderr, "Couldn't find owner root %llu\n", key.objectid); @@ -887,7 +956,11 @@ static int corrupt_item_nocow(struct btrfs_trans_handle *trans, if (slot == 0) del = 0; /* Only accept valid eb */ - BUG_ON(!leaf->data || slot >= btrfs_header_nritems(leaf)); + if (slot >= btrfs_header_nritems(leaf)) { + error("invalid eb: no data or slot out of range: %d >= %d", + slot, btrfs_header_nritems(leaf)); + return -EINVAL; + } btrfs_item_key_to_cpu(leaf, &key, slot); if (del) { fprintf(stdout, "Deleting key and data [%llu, %u, %llu].\n", @@ -1153,13 +1226,16 @@ int main(int argc, char **argv) if (logical == (u64)-1) print_usage(1); trans = btrfs_start_transaction(root, 1); - ret = corrupt_extent (trans, root, logical, 0); + BUG_ON(IS_ERR(trans)); + ret = corrupt_extent(trans, root, logical); btrfs_commit_transaction(trans, root); goto out_close; } if (extent_tree) { struct btrfs_trans_handle *trans; + trans = btrfs_start_transaction(root, 1); + BUG_ON(IS_ERR(trans)); btrfs_corrupt_extent_tree(trans, root->fs_info->extent_root, root->fs_info->extent_root->node); btrfs_commit_transaction(trans, root); @@ -1185,6 +1261,7 @@ int main(int argc, char **argv) goto out_close; } trans = btrfs_start_transaction(root, 1); + BUG_ON(IS_ERR(trans)); ret = corrupt_item_nocow(trans, root->fs_info->chunk_root, path, del); if (ret < 0) @@ -1194,7 +1271,9 @@ int main(int argc, char **argv) } if (chunk_tree) { struct btrfs_trans_handle *trans; + trans = btrfs_start_transaction(root, 1); + BUG_ON(IS_ERR(trans)); ret = corrupt_chunk_tree(trans, root->fs_info->chunk_root); if (ret < 0) fprintf(stderr, "Failed to corrupt chunk tree\n"); @@ -1208,6 +1287,7 @@ int main(int argc, char **argv) print_usage(1); trans = btrfs_start_transaction(root, 1); + BUG_ON(IS_ERR(trans)); if (file_extent == (u64)-1) { printf("corrupting inode\n"); ret = corrupt_inode(trans, root, inode, field); @@ -1222,7 +1302,8 @@ int main(int argc, char **argv) if (metadata_block) { if (*field == 0) print_usage(1); - ret = corrupt_metadata_block(root, metadata_block, field); + ret = corrupt_metadata_block(root->fs_info, metadata_block, + field); goto out_close; } if (corrupt_di) { @@ -1279,19 +1360,18 @@ int main(int argc, char **argv) print_usage(1); if (bytes == 0) - bytes = root->sectorsize; + bytes = root->fs_info->sectorsize; - bytes = (bytes + root->sectorsize - 1) / root->sectorsize; - bytes *= root->sectorsize; + bytes = round_up(bytes, root->fs_info->sectorsize); while (bytes > 0) { if (corrupt_block_keys) { - corrupt_keys_in_block(root, logical); + corrupt_keys_in_block(root->fs_info, logical); } else { struct extent_buffer *eb; eb = btrfs_find_create_tree_block(root->fs_info, - logical, root->sectorsize); + logical); if (!eb) { error( "not enough memory to allocate extent buffer for bytenr %llu", @@ -1300,12 +1380,12 @@ int main(int argc, char **argv) goto out_close; } - debug_corrupt_block(eb, root, logical, root->sectorsize, - copy); + debug_corrupt_block(eb, root, logical, + root->fs_info->sectorsize, copy); free_extent_buffer(eb); } - logical += root->sectorsize; - bytes -= root->sectorsize; + logical += root->fs_info->sectorsize; + bytes -= root->fs_info->sectorsize; } return ret; out_close: