From: Jens Axboe <axboe@kernel.dk> To: linux-fsdevel@vger.kernel.org, linux-aio@kvack.org, linux-block@vger.kernel.org, linux-arch@vger.kernel.org Cc: hch@lst.de, jmoyer@redhat.com, avi@scylladb.com, Jens Axboe <axboe@kernel.dk> Subject: [PATCH 02/15] block: wire up block device iopoll method Date: Wed, 16 Jan 2019 10:49:50 -0700 Message-ID: <20190116175003.17880-3-axboe@kernel.dk> (raw) In-Reply-To: <20190116175003.17880-1-axboe@kernel.dk> From: Christoph Hellwig <hch@lst.de> Just call blk_poll on the iocb cookie, we can derive the block device from the inode trivially. Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk> --- fs/block_dev.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/fs/block_dev.c b/fs/block_dev.c index c546cdce77e6..5415579f3e14 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -279,6 +279,14 @@ 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; @@ -396,6 +404,7 @@ __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_cookie, qc); break; } @@ -2068,6 +2077,7 @@ 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, -- 2.17.1
next prev parent reply index Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-01-16 17:49 [PATCHSET v5] io_uring IO interface Jens Axboe 2019-01-16 17:49 ` [PATCH 01/15] fs: add an iopoll method to struct file_operations Jens Axboe 2019-01-16 17:49 ` Jens Axboe [this message] 2019-01-16 17:49 ` [PATCH 03/15] block: add bio_set_polled() helper Jens Axboe 2019-01-16 17:49 ` [PATCH 04/15] iomap: wire up the iopoll method Jens Axboe 2019-01-16 17:49 ` [PATCH 05/15] Add io_uring IO interface Jens Axboe 2019-01-17 12:02 ` Roman Penyaev 2019-01-17 13:54 ` Jens Axboe 2019-01-17 14:34 ` Roman Penyaev 2019-01-17 14:54 ` Jens Axboe 2019-01-17 15:19 ` Roman Penyaev 2019-01-17 12:48 ` Roman Penyaev 2019-01-17 14:01 ` Jens Axboe 2019-01-17 20:03 ` Jeff Moyer 2019-01-17 20:09 ` Jens Axboe 2019-01-17 20:14 ` Jens Axboe 2019-01-17 20:50 ` Jeff Moyer 2019-01-17 20:53 ` Jens Axboe 2019-01-17 21:02 ` Jeff Moyer 2019-01-17 21:17 ` Jens Axboe 2019-01-17 21:21 ` Jeff Moyer 2019-01-17 21:27 ` Jens Axboe 2019-01-18 8:23 ` Roman Penyaev 2019-01-16 17:49 ` [PATCH 06/15] io_uring: add fsync support Jens Axboe 2019-01-16 17:49 ` [PATCH 07/15] io_uring: support for IO polling Jens Axboe 2019-01-16 17:49 ` [PATCH 08/15] fs: add fget_many() and fput_many() Jens Axboe 2019-01-16 17:49 ` [PATCH 09/15] io_uring: use fget/fput_many() for file references Jens Axboe 2019-01-16 17:49 ` [PATCH 10/15] io_uring: batch io_kiocb allocation Jens Axboe 2019-01-16 17:49 ` [PATCH 11/15] block: implement bio helper to add iter bvec pages to bio Jens Axboe 2019-01-16 17:50 ` [PATCH 12/15] io_uring: add support for pre-mapped user IO buffers Jens Axboe 2019-01-16 20:53 ` Dave Chinner 2019-01-16 21:20 ` Jens Axboe 2019-01-16 22:09 ` Dave Chinner 2019-01-16 22:21 ` Jens Axboe 2019-01-16 23:09 ` Dave Chinner 2019-01-16 23:17 ` Jens Axboe 2019-01-16 22:13 ` Jens Axboe 2019-01-16 17:50 ` [PATCH 13/15] io_uring: add submission polling Jens Axboe 2019-01-16 17:50 ` [PATCH 14/15] io_uring: add file registration Jens Axboe 2019-01-16 17:50 ` [PATCH 15/15] io_uring: add io_uring_event cache hit information Jens Axboe -- strict thread matches above, loose matches on Subject: below -- 2019-01-10 2:43 [PATCHSET v2] io_uring IO interface Jens Axboe 2019-01-10 2:43 ` [PATCH 02/15] block: wire up block device iopoll method Jens Axboe
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