[PATCH v2 07/13] nvme-multipath: add uring_cmd support

[John Garry <john.g.garry@oracle.com>]

Add callback nvme_mpath_chr_uring_cmd, which is equivalent to
nvme_ns_head_chr_uring_cmd().

Also fill in chr_uring_cmd_iopoll with same function as currently used,
chr_uring_cmd_iopoll().

Signed-off-by: John Garry <john.g.garry@oracle.com>
---
 drivers/nvme/host/ioctl.c     | 8 ++++++++
 drivers/nvme/host/multipath.c | 2 ++
 drivers/nvme/host/nvme.h      | 2 ++
 3 files changed, 12 insertions(+)

diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c
index ee99b8dbcdfff..07509a03d2ef4 100644
--- a/drivers/nvme/host/ioctl.c
+++ b/drivers/nvme/host/ioctl.c
@@ -719,6 +719,14 @@ void nvme_mpath_ioctl_finish(void *opaque)
 	nvme_put_ctrl(opaque);
 }
 
+int nvme_mpath_chr_uring_cmd(struct mpath_device *mpath_device,
+		struct io_uring_cmd *ioucmd,
+		unsigned int issue_flags)
+{
+	return nvme_ns_uring_cmd(nvme_mpath_to_ns(mpath_device), ioucmd,
+					issue_flags);
+}
+
 static int nvme_ns_head_ctrl_ioctl(struct nvme_ns *ns, unsigned int cmd,
 		void __user *argp, struct nvme_ns_head *head, int srcu_idx,
 		bool open_for_write)
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 5e49cd716f859..a51944ca56b1f 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -1448,4 +1448,6 @@ static const struct mpath_head_template mpdt = {
 	.cdev_ioctl = nvme_mpath_cdev_ioctl,
 	.ioctl_begin = nvme_mpath_ioctl_begin,
 	.ioctl_finish = nvme_mpath_ioctl_finish,
+	.chr_uring_cmd = nvme_mpath_chr_uring_cmd,
+	.chr_uring_cmd_iopoll = nvme_ns_chr_uring_cmd_iopoll,
 };
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 1ec45cce05c9c..efa868ba3fbf8 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -1052,6 +1052,8 @@ void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl);
 void nvme_mpath_remove_disk(struct nvme_ns_head *head);
 void nvme_mpath_start_request(struct request *rq);
 void nvme_mpath_end_request(struct request *rq);
+int nvme_mpath_chr_uring_cmd(struct mpath_device *mpath_device,
+		struct io_uring_cmd *ioucmd, unsigned int issue_flags);
 
 long nvme_mpath_cdev_ioctl(struct mpath_device *mpath_device, unsigned int cmd,
 			unsigned long arg, bool open_for_write);
-- 
2.43.5