On Wed, Mar 21, 2018 at 08:32:32AM +0100, Christoph Hellwig wrote:
> Simple workqueue offload for now, but prepared for adding a real aio_fsync
> method if the need arises. Based on an earlier patch from Dave Chinner.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
> fs/aio.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 50 insertions(+)
>
> diff --git a/fs/aio.c b/fs/aio.c
> index da87cbf7c67a..79d3eb3d2dd9 100644
> --- a/fs/aio.c
> +++ b/fs/aio.c
> @@ -156,9 +156,16 @@ struct kioctx {
> unsigned id;
> };
>
> +struct fsync_iocb {
> + struct work_struct work;
> + struct file *file;
> + bool datasync;
> +};
> +
> struct aio_kiocb {
> union {
> struct kiocb rw;
> + struct fsync_iocb fsync;
> };
>
> struct kioctx *ki_ctx;
> @@ -1565,6 +1572,43 @@ static ssize_t aio_write(struct kiocb *req, struct iocb *iocb, bool vectored,
> return ret;
> }
>
> +static void aio_fsync_work(struct work_struct *work)
> +{
> + struct fsync_iocb *req = container_of(work, struct fsync_iocb, work);
> + int ret;
> +
> + ret = vfs_fsync(req->file, req->datasync);
> + fput(req->file);
> + aio_complete(container_of(req, struct aio_kiocb, fsync), ret, 0);
> +}
> +
> +static int aio_fsync(struct fsync_iocb *req, struct iocb *iocb, bool datasync)
I hate the "bool" arguments to functions as you always need to go back
and look them up. A "wrapper" of "aio_fsync_datasync()" and
"aio_fsync_nodatasync()" around this maybe?
Anyway, very tiny nit, not a big deal, it's your code, you can maintain
it as-is :)
Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
