(2014/12/11 17:31), Dongsheng Yang wrote:
> We just need the type of a chunk to calculate the number of parity stripes,
> but we have to pass a structure of lookup_map to it. This will prevent some
> callers to use it where there is no a convenient lookup_map to be passed.
>
> This patch replace the parameter of struct map_lookup * with a profile type.
> Then we can use it more easily.
>
> Signed-off-by: Dongsheng Yang <yangds.f...@cn.fujitsu.com>
Although patch 1/3 and patch 3/3 is being discussed, at least
this patch (patch 2/3) looks fine to me.
Reviewed-by: Satoru Takeuchi <takeuchi_sat...@jp.fujitsu.com>
Thanks,
Satoru
> ---
> fs/btrfs/raid56.h | 8 ++++----
> fs/btrfs/volumes.c | 2 +-
> 2 files changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/fs/btrfs/raid56.h b/fs/btrfs/raid56.h
> index ea5d73b..68ac9d3 100644
> --- a/fs/btrfs/raid56.h
> +++ b/fs/btrfs/raid56.h
> @@ -19,11 +19,11 @@
>
> #ifndef __BTRFS_RAID56__
> #define __BTRFS_RAID56__
> -static inline int nr_parity_stripes(struct map_lookup *map)
> +static inline int nr_parity_stripes(u64 type)
> {
> - if (map->type & BTRFS_BLOCK_GROUP_RAID5)
> + if (type & BTRFS_BLOCK_GROUP_RAID5)
> return 1;
> - else if (map->type & BTRFS_BLOCK_GROUP_RAID6)
> + else if (type & BTRFS_BLOCK_GROUP_RAID6)
> return 2;
> else
> return 0;
> @@ -31,7 +31,7 @@ static inline int nr_parity_stripes(struct map_lookup *map)
>
> static inline int nr_data_stripes(struct map_lookup *map)
> {
> - return map->num_stripes - nr_parity_stripes(map);
> + return map->num_stripes - nr_parity_stripes(map->type);
> }
> #define RAID5_P_STRIPE ((u64)-2)
> #define RAID6_Q_STRIPE ((u64)-1)
> diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
> index f61278f..aa3a907 100644
> --- a/fs/btrfs/volumes.c
> +++ b/fs/btrfs/volumes.c
> @@ -5174,7 +5174,7 @@ static int __btrfs_map_block(struct btrfs_fs_info
> *fs_info, int rw,
>
> /* RAID[56] write or recovery. Return all stripes */
> num_stripes = map->num_stripes;
> - max_errors = nr_parity_stripes(map);
> + max_errors = nr_parity_stripes(map->type);
>
> raid_map = kmalloc_array(num_stripes, sizeof(u64),
> GFP_NOFS);
>
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