linux-ext4 - Re: [PATCH 06/10] fs: Introduce IOMAP

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Date:   Thu, 25 May 2017 10:33:49 +0200
From:   Jan Kara <jack@...e.cz>
To:     Goldwyn Rodrigues <rgoldwyn@...e.de>
Cc:     linux-fsdevel@...r.kernel.org, jack@...e.com, hch@...radead.org,
        linux-block@...r.kernel.org, linux-btrfs@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org,
        axboe@...nel.dk, linux-api@...r.kernel.org,
        adam.manzanares@....com, viro@...iv.linux.org.uk,
        Goldwyn Rodrigues <rgoldwyn@...e.com>
Subject: Re: [PATCH 06/10] fs: Introduce IOMAP_NOWAIT

On Wed 24-05-17 11:41:46, Goldwyn Rodrigues wrote:
> From: Goldwyn Rodrigues <rgoldwyn@...e.com>
> 
> IOCB_NOWAIT translates to IOMAP_NOWAIT for iomaps.
> This is used by XFS in the XFS patch.
> 
> Signed-off-by: Goldwyn Rodrigues <rgoldwyn@...e.com>
> Reviewed-by: Christoph Hellwig <hch@....de>

Looks good. You can add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  fs/iomap.c            | 2 ++
>  include/linux/iomap.h | 1 +
>  2 files changed, 3 insertions(+)
> 
> diff --git a/fs/iomap.c b/fs/iomap.c
> index 4b10892967a5..5d85ec6e7b20 100644
> --- a/fs/iomap.c
> +++ b/fs/iomap.c
> @@ -879,6 +879,8 @@ iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
>  	} else {
>  		dio->flags |= IOMAP_DIO_WRITE;
>  		flags |= IOMAP_WRITE;
> +		if (iocb->ki_flags & IOCB_NOWAIT)
> +			flags |= IOMAP_NOWAIT;
>  	}
>  
>  	ret = filemap_write_and_wait_range(mapping, start, end);
> diff --git a/include/linux/iomap.h b/include/linux/iomap.h
> index f753e788da31..69f4e9470084 100644
> --- a/include/linux/iomap.h
> +++ b/include/linux/iomap.h
> @@ -52,6 +52,7 @@ struct iomap {
>  #define IOMAP_REPORT		(1 << 2) /* report extent status, e.g. FIEMAP */
>  #define IOMAP_FAULT		(1 << 3) /* mapping for page fault */
>  #define IOMAP_DIRECT		(1 << 4) /* direct I/O */
> +#define IOMAP_NOWAIT		(1 << 5) /* Don't wait for writeback */
>  
>  struct iomap_ops {
>  	/*
> -- 
> 2.12.0
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR