linux-kernel - Re: [PATCH 2/3] io_uring: add interface for getting files

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Message-ID: <74320473-6f9f-7b10-4d5c-850c6f3af5ae@kernel.dk>
Date:   Tue, 21 Jan 2020 18:54:14 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Pavel Begunkov <asml.silence@...il.com>, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Cc:     Alexander Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH 2/3] io_uring: add interface for getting files

On 1/21/20 5:05 PM, Pavel Begunkov wrote:
> Preparation without functional changes. Adds io_get_file(), that allows
> to grab files not only into req->file.
> 
> Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
> ---
>  fs/io_uring.c | 66 ++++++++++++++++++++++++++++++++-------------------
>  1 file changed, 41 insertions(+), 25 deletions(-)
> 
> diff --git a/fs/io_uring.c b/fs/io_uring.c
> index 8f7846cb1ebf..e9e4aee0fb99 100644
> --- a/fs/io_uring.c
> +++ b/fs/io_uring.c
> @@ -1161,6 +1161,15 @@ static struct io_kiocb *io_get_req(struct io_ring_ctx *ctx,
>  	return NULL;
>  }
>  
> +static inline void io_put_file(struct io_ring_ctx *ctx, struct file *file,
> +			  bool fixed)
> +{
> +	if (fixed)
> +		percpu_ref_put(&ctx->file_data->refs);
> +	else
> +		fput(file);
> +}

Just make this take struct io_kiocb?

Apart from that, looks fine to me.

-- 
Jens Axboe