diff options
Diffstat (limited to 'btrfs-corrupt-block.c')
| -rw-r--r-- | btrfs-corrupt-block.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/btrfs-corrupt-block.c b/btrfs-corrupt-block.c index cf926730..6c335b95 100644 --- a/btrfs-corrupt-block.c +++ b/btrfs-corrupt-block.c @@ -110,6 +110,9 @@ static void print_usage(void) 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"); exit(1); } @@ -843,6 +846,26 @@ out: return ret; } +static int delete_csum(struct btrfs_root *root, u64 bytenr, u64 bytes) +{ + struct btrfs_trans_handle *trans; + int ret; + + root = root->fs_info->csum_root; + trans = btrfs_start_transaction(root, 1); + if (IS_ERR(trans)) { + fprintf(stderr, "Couldn't start transaction %ld\n", + PTR_ERR(trans)); + return PTR_ERR(trans); + } + + ret = btrfs_del_csums(trans, root, bytenr, bytes); + if (ret) + fprintf(stderr, "Error deleting csums %d\n", ret); + btrfs_commit_transaction(trans, root); + return ret; +} + /* corrupt item using NO cow. * Because chunk recover will recover based on whole partition scaning, * If using COW, chunk recover will use the old item to recover, @@ -1009,6 +1032,7 @@ int main(int ac, char **av) u64 inode = 0; u64 file_extent = (u64)-1; u64 root_objectid = 0; + u64 csum_bytenr = 0; char field[FIELD_BUF_LEN]; field[0] = '\0'; @@ -1036,10 +1060,11 @@ int main(int ac, char **av) { "dir-item", no_argument, NULL, 'D'}, { "delete", no_argument, NULL, 'd'}, { "root", no_argument, NULL, 'r'}, + { "csum", required_argument, NULL, 'C'}, { NULL, 0, NULL, 0 } }; - c = getopt_long(ac, av, "l:c:b:eEkuUi:f:x:m:K:IDdr:", + c = getopt_long(ac, av, "l:c:b:eEkuUi:f:x:m:K:IDdr:C:", long_options, NULL); if (c < 0) break; @@ -1103,6 +1128,9 @@ int main(int ac, char **av) case 'r': root_objectid = arg_strtou64(optarg); break; + case 'C': + csum_bytenr = arg_strtou64(optarg); + break; default: print_usage(); } @@ -1205,6 +1233,10 @@ int main(int ac, char **av) ret = corrupt_dir_item(root, &key, field); goto out_close; } + if (csum_bytenr) { + ret = delete_csum(root, csum_bytenr, bytes); + goto out_close; + } if (corrupt_item) { if (!key.objectid) print_usage(); |