nvme: make nvmf_register_transport require a create_ctrl callback
nvmf_create_ctrl() relys on the presence of a create_crtl callback in the
registered nvmf_transport_ops, so make nvmf_register_transport require one.
Update the available call-sites as well to reflect these changes.
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
index 916d136..5b7386f 100644
--- a/drivers/nvme/host/fabrics.c
+++ b/drivers/nvme/host/fabrics.c
@@ -480,11 +480,16 @@ EXPORT_SYMBOL_GPL(nvmf_connect_io_queue);
* being implemented to the common NVMe fabrics library. Part of
* the overall init sequence of starting up a fabrics driver.
*/
-void nvmf_register_transport(struct nvmf_transport_ops *ops)
+int nvmf_register_transport(struct nvmf_transport_ops *ops)
{
+ if (!ops->create_ctrl)
+ return -EINVAL;
+
mutex_lock(&nvmf_transports_mutex);
list_add_tail(&ops->entry, &nvmf_transports);
mutex_unlock(&nvmf_transports_mutex);
+
+ return 0;
}
EXPORT_SYMBOL_GPL(nvmf_register_transport);
diff --git a/drivers/nvme/host/fabrics.h b/drivers/nvme/host/fabrics.h
index 924145c9..1560181 100644
--- a/drivers/nvme/host/fabrics.h
+++ b/drivers/nvme/host/fabrics.h
@@ -128,7 +128,7 @@ int nvmf_reg_read64(struct nvme_ctrl *ctrl, u32 off, u64 *val);
int nvmf_reg_write32(struct nvme_ctrl *ctrl, u32 off, u32 val);
int nvmf_connect_admin_queue(struct nvme_ctrl *ctrl);
int nvmf_connect_io_queue(struct nvme_ctrl *ctrl, u16 qid);
-void nvmf_register_transport(struct nvmf_transport_ops *ops);
+int nvmf_register_transport(struct nvmf_transport_ops *ops);
void nvmf_unregister_transport(struct nvmf_transport_ops *ops);
void nvmf_free_options(struct nvmf_ctrl_options *opts);
const char *nvmf_get_subsysnqn(struct nvme_ctrl *ctrl);
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index fb51a8d..6186fde 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -2562,8 +2562,7 @@ static int __init nvme_fc_init_module(void)
if (!nvme_fc_wq)
return -ENOMEM;
- nvmf_register_transport(&nvme_fc_transport);
- return 0;
+ return nvmf_register_transport(&nvme_fc_transport);
}
static void __exit nvme_fc_exit_module(void)
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index a75e95d..aedac6e 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -2063,8 +2063,7 @@ static int __init nvme_rdma_init_module(void)
return ret;
}
- nvmf_register_transport(&nvme_rdma_transport);
- return 0;
+ return nvmf_register_transport(&nvme_rdma_transport);
}
static void __exit nvme_rdma_cleanup_module(void)
diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c
index f3862e3..d1f06e7 100644
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c
@@ -724,8 +724,7 @@ static int __init nvme_loop_init_module(void)
ret = nvmet_register_transport(&nvme_loop_ops);
if (ret)
return ret;
- nvmf_register_transport(&nvme_loop_transport);
- return 0;
+ return nvmf_register_transport(&nvme_loop_transport);
}
static void __exit nvme_loop_cleanup_module(void)