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fs: Add aio iopriority support

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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>
This commit is contained in:
Adam Manzanares
2018-05-22 10:52:19 -07:00
committed by Al Viro
parent fc28724d67
commit d9a08a9e61
4 changed files with 23 additions and 0 deletions
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include/uapi/linux/aio_abi.h
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@@ -53,6 +53,7 @@ enum {
* is valid.
*/
#define IOCB_FLAG_RESFD (1 << 0)
#define IOCB_FLAG_IOPRIO (1 << 1)
/* read() from /dev/aio returns these structures. */
struct io_event {