Commit b9039eba authored by Krzysztof Karas's avatar Krzysztof Karas Committed by Jim Harris
Browse files

bdev/passthru: generate UUID from parent bdev UUID 



Use base bdev UUID to generate new UUID for passthru bdev.

Change-Id: Ic4fb28d25766499aed6683f84f1ccd39280cd321
Signed-off-by: default avatarKrzysztof Karas <krzysztof.karas@intel.com>
Signed-off-by: default avatarJim Harris <james.r.harris@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/17125


Reviewed-by: default avatarAleksey Marchuk <alexeymar@nvidia.com>
Tested-by: default avatarSPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
parent 12359c17

module/bdev/passthru/vbdev_passthru.c

+16 −0
Original line number Diff line number Diff line
@@ -22,6 +22,8 @@ 
#include "spdk/bdev_module.h"

#include "spdk/log.h"



/* This namespace UUID was generated using uuid_generate() method. */

#define BDEV_PASSTHRU_NAMESPACE_UUID "7e25812e-c8c0-4d3f-8599-16d790555b85"



static int vbdev_passthru_init(void);

static int vbdev_passthru_get_ctx_size(void);
@@ -581,8 +583,11 @@ vbdev_passthru_register(const char *bdev_name) 
	struct bdev_names *name;

	struct vbdev_passthru *pt_node;

	struct spdk_bdev *bdev;

	struct spdk_uuid ns_uuid;

	int rc = 0;



	spdk_uuid_parse(&ns_uuid, BDEV_PASSTHRU_NAMESPACE_UUID);



	/* Check our list of names from config versus this bdev and if

	 * there's a match, create the pt_node & bdev accordingly.

	 */
@@ -624,6 +629,17 @@ vbdev_passthru_register(const char *bdev_name) 
		bdev = spdk_bdev_desc_get_bdev(pt_node->base_desc);

		pt_node->base_bdev = bdev;



		/* Generate UUID based on namespace UUID + base bdev UUID. */

		rc = spdk_uuid_generate_sha1(&pt_node->pt_bdev.uuid, &ns_uuid,

					     (const char *)&pt_node->base_bdev->uuid, sizeof(struct spdk_uuid));

		if (rc) {

			SPDK_ERRLOG("Unable to generate new UUID for passthru bdev\n");

			spdk_bdev_close(pt_node->base_desc);

			free(pt_node->pt_bdev.name);

			free(pt_node);

			break;

		}



		/* Copy some properties from the underlying base bdev. */

		pt_node->pt_bdev.write_cache = bdev->write_cache;

		pt_node->pt_bdev.required_alignment = bdev->required_alignment;