diff options
| author | Christoph Hellwig <hch@lst.de> | 2018-11-30 08:31:52 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-02-24 08:20:17 -0700 |
| commit | eae83ce10b4713d9f4f3419af16436f89c1a7172 (patch) | |
| tree | 38025badb32cde77d2558d4b7c8a152388466949 /fs/block_dev.c | |
| parent | fb7e160019f4abb4082740bfeb27a38f6389c745 (diff) | |
| download | lwn-eae83ce10b4713d9f4f3419af16436f89c1a7172.tar.gz lwn-eae83ce10b4713d9f4f3419af16436f89c1a7172.zip | |
block: wire up block device iopoll method
Just call blk_poll on the iocb cookie, we can derive the block device
from the inode trivially.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/block_dev.c')
| -rw-r--r-- | fs/block_dev.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index 7758adee6efe..1fe498b08f1b 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -294,6 +294,14 @@ struct blkdev_dio { static struct bio_set blkdev_dio_pool; +static int blkdev_iopoll(struct kiocb *kiocb, bool wait) +{ + struct block_device *bdev = I_BDEV(kiocb->ki_filp->f_mapping->host); + struct request_queue *q = bdev_get_queue(bdev); + + return blk_poll(q, READ_ONCE(kiocb->ki_cookie), wait); +} + static void blkdev_bio_end_io(struct bio *bio) { struct blkdev_dio *dio = bio->bi_private; @@ -408,10 +416,17 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages) nr_pages = iov_iter_npages(iter, BIO_MAX_PAGES); if (!nr_pages) { - if (iocb->ki_flags & IOCB_HIPRI) + bool polled = false; + + if (iocb->ki_flags & IOCB_HIPRI) { bio->bi_opf |= REQ_HIPRI; + polled = true; + } qc = submit_bio(bio); + + if (polled) + WRITE_ONCE(iocb->ki_cookie, qc); break; } @@ -2078,6 +2093,7 @@ const struct file_operations def_blk_fops = { .llseek = block_llseek, .read_iter = blkdev_read_iter, .write_iter = blkdev_write_iter, + .iopoll = blkdev_iopoll, .mmap = generic_file_mmap, .fsync = blkdev_fsync, .unlocked_ioctl = block_ioctl, |