From d9a08a9e616beeccdbd0e7262b7225ffdfa49e92 Mon Sep 17 00:00:00 2001 From: Adam Manzanares <adam.manzanares@wdc.com> Date: Tue, 22 May 2018 10:52:19 -0700 Subject: fs: Add aio iopriority support This is the per-I/O equivalent of the ioprio_set system call. When IOCB_FLAG_IOPRIO is set on the iocb aio_flags field, then we set the newly added kiocb ki_ioprio field to the value in the iocb aio_reqprio field. This patch depends on block: add ioprio_check_cap function. Signed-off-by: Adam Manzanares <adam.manzanares@wdc.com> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> --- drivers/block/loop.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/block/loop.c') diff --git a/drivers/block/loop.c b/drivers/block/loop.c index 5d4e31655d96..dd98dfd97f5e 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -76,6 +76,8 @@ #include <linux/miscdevice.h> #include <linux/falloc.h> #include <linux/uio.h> +#include <linux/ioprio.h> + #include "loop.h" #include <linux/uaccess.h> @@ -559,6 +561,7 @@ static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd, cmd->iocb.ki_filp = file; cmd->iocb.ki_complete = lo_rw_aio_complete; cmd->iocb.ki_flags = IOCB_DIRECT; + cmd->iocb.ki_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_NONE, 0); if (cmd->css) kthread_associate_blkcg(cmd->css); -- cgit v1.2.3