[PATCH 10/19] nvme-multipath: add uring_cmd support

John Garry
2026-02-25T15:41:05Z

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 | 9 +++++++++
drivers/nvme/host/multipath.c | 2 ++
drivers/nvme/host/nvme.h | 2 ++
3 files changed, 13 insertions(+)

diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c
index 7f0bd38f8c24e..773c819cde52a 100644
--- a/drivers/nvme/host/ioctl.c
+++ b/drivers/nvme/host/ioctl.c
@@ -701,6 +701,15 @@ static int nvme_mpath_device_ctrl_ioctl(struct mpath_device *mpath_device,
return ret;
}

+int nvme_mpath_chr_uring_cmd(struct mpath_device *mpath_device,
+ struct io_uring_cmd *ioucmd,
+ unsigned int issue_flags)
+{
+ struct nvme_ns *ns = nvme_mpath_to_ns(mpath_device);
+
+ return nvme_ns_uring_cmd(ns, 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 513d73e589a58..12386f9caa72a 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -1492,4 +1492,6 @@ static const struct mpath_head_template mpdt = {
.get_access_state = nvme_mpath_get_access_state,
.bdev_ioctl = nvme_mpath_bdev_ioctl,
.cdev_ioctl = nvme_mpath_cdev_ioctl,
+ .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 11b63e92502ad..bc0ad0bbb68fd 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -1053,6 +1053,8 @@ int nvme_mpath_bdev_ioctl(struct block_device *bdev,
int nvme_mpath_cdev_ioctl(struct mpath_head *mpath_device,
struct mpath_device *mpath_head, blk_mode_t mode,
unsigned int cmd, unsigned long arg, int srcu_idx);
+int nvme_mpath_chr_uring_cmd(struct mpath_device *mpath_device,
+ struct io_uring_cmd *ioucmd, unsigned int issue_flags);

static inline bool nvme_is_mpath_request(struct request *req)
{
--
2.43.5