From: Adam Manzanares <[email protected]> When the IOCB_IOPRIO flag is set because the user supplied iocb has the RWF_IOPRIO flag is set then we set the priority value of the kiocb from the iocb.
When a bio is created for an aio request by the block dev we set the priority value of the bio to the user supplied value. Signed-off-by: Adam Manzanares <[email protected]> --- fs/aio.c | 9 +++++++++ fs/block_dev.c | 1 + 2 files changed, 10 insertions(+) diff --git a/fs/aio.c b/fs/aio.c index 88d7927ffbc6..47591f9e7ba3 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -1603,6 +1603,15 @@ static int io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb, goto out_put_req; } + if (req->common.ki_flags & IOCB_IOPRIO) + /* + * The IOCB_IOPRIO flag is set when the user supplied iocb + * aio_rw_flag field has the RWF_IOPRIO flag set. If so, + * aio_reqprio is interpreted as a I/O scheduling class and + * priority. + */ + req->common.ki_ioprio = iocb->aio_reqprio; + ret = put_user(KIOCB_KEY, &user_iocb->aio_key); if (unlikely(ret)) { pr_debug("EFAULT: aio_key\n"); diff --git a/fs/block_dev.c b/fs/block_dev.c index 7ec920e27065..da1e94d2bb75 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -355,6 +355,7 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages) bio->bi_write_hint = iocb->ki_hint; bio->bi_private = dio; bio->bi_end_io = blkdev_bio_end_io; + bio->bi_ioprio = iocb->ki_ioprio; ret = bio_iov_iter_get_pages(bio, iter); if (unlikely(ret)) { -- 2.15.1
