[PATCH 3/5] aio: add iocb->ki_blk_qc field
From: Jens Axboe <axboe@kernel.dk>
Date: 2018-11-18 10:11:53
Also in:
linux-fsdevel
Subsystem:
filesystems (vfs and infrastructure), the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
Add the field and have the blockdev direct_IO() helpers set it. This is in preparation for being able to poll for iocb completion. Signed-off-by: Jens Axboe <axboe@kernel.dk> --- fs/block_dev.c | 2 ++ include/linux/fs.h | 1 + 2 files changed, 3 insertions(+)
diff --git a/fs/block_dev.c b/fs/block_dev.c
index d233a59ea364..8a2fed18e3fc 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c@@ -236,6 +236,7 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter, bio.bi_opf |= REQ_HIPRI; qc = submit_bio(&bio); + WRITE_ONCE(iocb->ki_blk_qc, qc); for (;;) { __set_current_state(TASK_UNINTERRUPTIBLE);
@@ -396,6 +397,7 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages) bio->bi_opf |= REQ_HIPRI; qc = submit_bio(bio); + WRITE_ONCE(iocb->ki_blk_qc, qc); break; }
diff --git a/include/linux/fs.h b/include/linux/fs.h
index c95c0807471f..032761d9b218 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h@@ -310,6 +310,7 @@ struct kiocb { int ki_flags; u16 ki_hint; u16 ki_ioprio; /* See linux/ioprio.h */ + u32 ki_blk_qc; } __randomize_layout; static inline bool is_sync_kiocb(struct kiocb *kiocb)
--
2.17.1