If checksum root is corrupted, fsck will get segmentation. This
is because if we fail to load checksum root, root's node is NULL which
cause NULL pointer deferences later.
To fix this problem, we just did something like extent tree rebuilding.
Allocate a new one and clear uptodate flag. We will do sanity check
before fsck going on.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
ret = -EIO;
goto close_out;
}
+ if (!extent_buffer_uptodate(info->csum_root->node)) {
+ fprintf(stderr, "Checksum root corrupted, rerun with --init-csum-tree option\n");
+ ret = -EIO;
+ goto close_out;
+ }
fprintf(stderr, "checking extents\n");
ret = check_chunks_and_extents(root);
printk("Couldn't setup csum tree\n");
if (!(flags & OPEN_CTREE_PARTIAL))
return -EIO;
+ /* do the same thing as extent tree rebuilding */
+ fs_info->csum_root->node =
+ btrfs_find_create_tree_block(fs_info->extent_root, 0,
+ leafsize);
+ if (!fs_info->csum_root->node)
+ return -ENOMEM;
+ clear_extent_buffer_uptodate(NULL, fs_info->csum_root->node);
}
fs_info->csum_root->track_dirty = 1;