[U-Boot] [PATCH] fs: btrfs: Fix not all CHUNK_ITEMs being read from CHUNK_TREE

[Marek Behún]

Hmm, for some reason there are some items with objectid=0 and type=0
betwenn CHUNK_ITEM_KEYs, and thus the reading breaks before reading all
items. I am not sure if this is an error in our driver or there really
are such items, but yout patch solves this.

Reviewed-by: Marek Behun <marek.behun at nic.cz>

On Tue,  5 Jun 2018 13:11:01 +0300
Yevgeny Popovych <yevgenyp at pointgrab.com> wrote:

> This causes errors when translating logical addresses to physical:
>   btrfs_map_logical_to_physical: Cannot map logical address <addr> to
> physical btrfs_file_read: Error reading extent
> 
> The behavior of btrfs_map_logical_to_physical() is to stop traversing
> CHUNK_TREE when it encounters first non-CHUNK_ITEM, which makes
> only some portion of CHUNK_ITEMs being read.
> Change it to skip over non-chunk items.
> 
> Signed-off-by: Yevgeny Popovych <yevgenyp at pointgrab.com>
> Cc: Marek Behun <marek.behun at nic.cz>
> Cc: Sergey Struzh <sergeys at pointgrab.com>
> ---
>  fs/btrfs/chunk-map.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/btrfs/chunk-map.c b/fs/btrfs/chunk-map.c
> index b3b5ef7..beb6a4b 100644
> --- a/fs/btrfs/chunk-map.c
> +++ b/fs/btrfs/chunk-map.c
> @@ -158,7 +158,7 @@ int btrfs_read_chunk_tree(void)
>  	do {
>  		found_key = btrfs_path_leaf_key(&path);
>  		if (btrfs_comp_keys_type(&key, found_key))
> -			break;
> +			continue;
>  
>  		chunk = btrfs_path_item_ptr(&path, struct
> btrfs_chunk); btrfs_chunk_to_cpu(chunk);