On 2018/11/28 上午3:53, David Sterba wrote: > We can use simple enum for values that are not part of on-disk format: > ordered extent flags. > > Signed-off-by: David Sterba <dste...@suse.com>
Reviewed-by: Qu Wenruo <w...@suse.com>
Thanks,
Qu
> ---
> fs/btrfs/ordered-data.h | 45 +++++++++++++++++++++++------------------
> 1 file changed, 25 insertions(+), 20 deletions(-)
>
> diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
> index b10e6765d88f..fb9a161f0215 100644
> --- a/fs/btrfs/ordered-data.h
> +++ b/fs/btrfs/ordered-data.h
> @@ -37,26 +37,31 @@ struct btrfs_ordered_sum {
> * rbtree, just before waking any waiters. It is used to indicate the
> * IO is done and any metadata is inserted into the tree.
> */
> -#define BTRFS_ORDERED_IO_DONE 0 /* set when all the pages are written */
> -
> -#define BTRFS_ORDERED_COMPLETE 1 /* set when removed from the tree */
> -
> -#define BTRFS_ORDERED_NOCOW 2 /* set when we want to write in place */
> -
> -#define BTRFS_ORDERED_COMPRESSED 3 /* writing a zlib compressed extent */
> -
> -#define BTRFS_ORDERED_PREALLOC 4 /* set when writing to preallocated extent
> */
> -
> -#define BTRFS_ORDERED_DIRECT 5 /* set when we're doing DIO with this extent
> */
> -
> -#define BTRFS_ORDERED_IOERR 6 /* We had an io error when writing this out */
> -
> -#define BTRFS_ORDERED_UPDATED_ISIZE 7 /* indicates whether this ordered
> extent
> - * has done its due diligence in updating
> - * the isize. */
> -#define BTRFS_ORDERED_TRUNCATED 8 /* Set when we have to truncate an extent
> */
> -
> -#define BTRFS_ORDERED_REGULAR 10 /* Regular IO for COW */
> +enum {
> + /* set when all the pages are written */
> + BTRFS_ORDERED_IO_DONE,
> + /* set when removed from the tree */
> + BTRFS_ORDERED_COMPLETE,
> + /* set when we want to write in place */
> + BTRFS_ORDERED_NOCOW,
> + /* writing a zlib compressed extent */
> + BTRFS_ORDERED_COMPRESSED,
> + /* set when writing to preallocated extent */
> + BTRFS_ORDERED_PREALLOC,
> + /* set when we're doing DIO with this extent */
> + BTRFS_ORDERED_DIRECT,
> + /* We had an io error when writing this out */
> + BTRFS_ORDERED_IOERR,
> + /*
> + * indicates whether this ordered extent has done its due diligence in
> + * updating the isize
> + */
> + BTRFS_ORDERED_UPDATED_ISIZE,
> + /* Set when we have to truncate an extent */
> + BTRFS_ORDERED_TRUNCATED,
> + /* Regular IO for COW */
> + BTRFS_ORDERED_REGULAR,
> +};
>
> struct btrfs_ordered_extent {
> /* logical offset in the file */
>
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