Btrfs devel - Aug 2007 - Quick question

Hello,

Ok I've just about got this xattr stuff working, the name is getting saved
properly, but the data isn't.  This is what I'm doing to write the data
in the
dir item

        btrfs_set_dir_data_len(dir_item, data_len);
        name_ptr = (char *)(dir_item + 1);
        data_ptr = (char *)(name_ptr + name_len + 1);

        btrfs_memcpy(root, path->nodes[0]->b_data, name_ptr, name,
name_len);
        btrfs_memcpy(root, path->nodes[0]->b_data, data_ptr, data,
data_len);
        btrfs_mark_buffer_dirty(path->nodes[0]);

this keeps resulting in garbage when i try to read it off the disk.  What am I
missing?  Thank you,

Josef

On Mon, 27 Aug 2007 17:37:37 -0400
Josef Bacik <jbacik@redhat.com> wrote:
> Hello,
> 
> Ok I've just about got this xattr stuff working, the name is getting
> saved properly, but the data isn't.  This is what I'm doing to
write
> the data in the dir item
> 
>         btrfs_set_dir_data_len(dir_item, data_len);
>         name_ptr = (char *)(dir_item + 1);
>         data_ptr = (char *)(name_ptr + name_len + 1);
> 
>         btrfs_memcpy(root, path->nodes[0]->b_data, name_ptr, name,
> name_len); btrfs_memcpy(root, path->nodes[0]->b_data, data_ptr, data,
> data_len); btrfs_mark_buffer_dirty(path->nodes[0]);
> 
> this keeps resulting in garbage when i try to read it off the disk.
> What am I missing?  Thank you,
It works best to hack knowledge of your stuff into
btrfsprogs/print-tree.c, so that debug-tree will show you what is going
on.  But, the length of the item in the item header needs to include
the length of the data, so my guess is that's the problem.  If you post
the code I can take a look.

-chris