On Wed, Feb 26, 2020 at 04:37:18PM +0800, Bob Liu wrote:
> Support protect information passed from use sapce, on direct io
> is considered now.
>
> Signed-off-by: Bob Liu <bob.liu@xxxxxxxxxx>
> ---
> fs/block_dev.c | 17 +++++++++++++++++
> 1 file changed, 17 insertions(+)
>
> diff --git a/fs/block_dev.c b/fs/block_dev.c
> index 69bf2fb..10e3299 100644
> --- a/fs/block_dev.c
> +++ b/fs/block_dev.c
> @@ -348,6 +348,13 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages)
> loff_t pos = iocb->ki_pos;
> blk_qc_t qc = BLK_QC_T_NONE;
> int ret = 0;
> + struct iovec *pi_iov;
> +
> + if (iocb->ki_flags & IOCB_USE_PI) {
> + ret = iter_slice_protect_info(iter, nr_pages, &pi_iov);
> + if (ret)
> + return -EINVAL;
> + }
>
> if ((pos | iov_iter_alignment(iter)) &
> (bdev_logical_block_size(bdev) - 1))
> @@ -411,6 +418,16 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages)
> polled = true;
> }
>
> + /* Add protection information to bio */
> + if (iocb->ki_flags & IOCB_USE_PI) {
> + ret = bio_integrity_prep_from_iovec(bio, pi_iov);
> + if (ret) {
> + bio->bi_status = BLK_STS_IOERR;
> + bio_endio(bio);
If you're just going to mash all the error codes into IOERR, then this
could very well become bio_io_error() ?
--D
> + break;
> + }
> + }
> +
> qc = submit_bio(bio);
>
> if (polled)
> --
> 2.9.5
>
