linux-kernel - [PATCH v1 3/3] virtio-blk: add uring

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Message-Id: <20241218092435.21671-4-mengferry@linux.alibaba.com>
Date: Wed, 18 Dec 2024 17:24:35 +0800
From: Ferry Meng <mengferry@...ux.alibaba.com>
To: "Michael S . Tsirkin" <mst@...hat.com>,
	Jason Wang <jasowang@...hat.com>,
	linux-block@...r.kernel.org,
	Jens Axboe <axboe@...nel.dk>,
	virtualization@...ts.linux.dev
Cc: linux-kernel@...r.kernel.org,
	io-uring@...r.kernel.org,
	Stefan Hajnoczi <stefanha@...hat.com>,
	Christoph Hellwig <hch@...radead.org>,
	Joseph Qi <joseph.qi@...ux.alibaba.com>,
	Jeffle Xu <jefflexu@...ux.alibaba.com>,
	Ferry Meng <mengferry@...ux.alibaba.com>
Subject: [PATCH v1 3/3] virtio-blk: add uring_cmd iopoll support.

Add polling support for uring_cmd polling support for virtblk, which
will be called during completion-polling.

Signed-off-by: Ferry Meng <mengferry@...ux.alibaba.com>
---
 drivers/block/virtio_blk.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index cd88cf939144..cd4c74e06107 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -1464,6 +1464,18 @@ static int virtblk_chr_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue
 	return virtblk_uring_cmd(vblk, ioucmd, issue_flags);
 }
 
+static int virtblk_chr_uring_cmd_iopoll(struct io_uring_cmd *ioucmd,
+				 struct io_comp_batch *iob,
+				 unsigned int poll_flags)
+{
+	struct virtblk_uring_cmd_pdu *pdu = virtblk_get_uring_cmd_pdu(ioucmd);
+	struct request *req = pdu->req;
+
+	if (req && blk_rq_is_poll(req))
+		return blk_rq_poll(req, iob, poll_flags);
+	return 0;
+}
+
 static void virtblk_cdev_rel(struct device *dev)
 {
 	ida_free(&vd_chr_minor_ida, MINOR(dev->devt));
@@ -1512,6 +1524,7 @@ static int virtblk_cdev_add(struct virtio_blk *vblk,
 static const struct file_operations virtblk_chr_fops = {
 	.owner		= THIS_MODULE,
 	.uring_cmd	= virtblk_chr_uring_cmd,
+	.uring_cmd_iopoll = virtblk_chr_uring_cmd_iopoll,
 };
 
 static unsigned int virtblk_queue_depth;
-- 
2.43.5