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Commit 5f568556 authored by James Smart's avatar James Smart Committed by Christoph Hellwig
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nvme-fc: create fc class and transport device 



Added a new fc class and a device node for udev events under it.  I
expect the fc class will eventually be the location where the FC SCSI and
FC NVME merge in the future. Therefore names are kept somewhat generic.

Signed-off-by: default avatarJames Smart <james.smart@broadcom.com>
Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent eaefd5ab

drivers/nvme/host/fc.c

+54 −1
Original line number Diff line number Diff line
@@ -213,6 +213,13 @@ static DEFINE_IDA(nvme_fc_ctrl_cnt); 






/*

 * These items are short-term. They will eventually be moved into

 * a generic FC class. See comments in module init.

 */

static struct class *fc_class;

static struct device *fc_udev_device;





/* *********************** FC-NVME Port Management ************************ */
@@ -3046,7 +3053,50 @@ static struct nvmf_transport_ops nvme_fc_transport = { 


static int __init nvme_fc_init_module(void)

{

	return nvmf_register_transport(&nvme_fc_transport);

	int ret;



	/*

	 * NOTE:

	 * It is expected that in the future the kernel will combine

	 * the FC-isms that are currently under scsi and now being

	 * added to by NVME into a new standalone FC class. The SCSI

	 * and NVME protocols and their devices would be under this

	 * new FC class.

	 *

	 * As we need something to post FC-specific udev events to,

	 * specifically for nvme probe events, start by creating the

	 * new device class.  When the new standalone FC class is

	 * put in place, this code will move to a more generic

	 * location for the class.

	 */

	fc_class = class_create(THIS_MODULE, "fc");

	if (IS_ERR(fc_class)) {

		pr_err("couldn't register class fc\n");

		return PTR_ERR(fc_class);

	}



	/*

	 * Create a device for the FC-centric udev events

	 */

	fc_udev_device = device_create(fc_class, NULL, MKDEV(0, 0), NULL,

				"fc_udev_device");

	if (IS_ERR(fc_udev_device)) {

		pr_err("couldn't create fc_udev device!\n");

		ret = PTR_ERR(fc_udev_device);

		goto out_destroy_class;

	}



	ret = nvmf_register_transport(&nvme_fc_transport);

	if (ret)

		goto out_destroy_device;



	return 0;



out_destroy_device:

	device_destroy(fc_class, MKDEV(0, 0));

out_destroy_class:

	class_destroy(fc_class);

	return ret;

}



static void __exit nvme_fc_exit_module(void)
@@ -3059,6 +3109,9 @@ static void __exit nvme_fc_exit_module(void) 


	ida_destroy(&nvme_fc_local_port_cnt);

	ida_destroy(&nvme_fc_ctrl_cnt);



	device_destroy(fc_class, MKDEV(0, 0));

	class_destroy(fc_class);

}



module_init(nvme_fc_init_module);