Spdk/module/bdev/passthru/vbdev_passthru_rpc.c

/*-
 *   BSD LICENSE
 *
 *   Copyright (c) Intel Corporation.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "vbdev_passthru.h"
#include "spdk/rpc.h"
#include "spdk/util.h"
#include "spdk/string.h"
#include "spdk/log.h"

/* Structure to hold the parameters for this RPC method. */
struct rpc_bdev_passthru_create {
	char *base_bdev_name;
	char *name;
};

/* Free the allocated memory resource after the RPC handling. */
static void
free_rpc_bdev_passthru_create(struct rpc_bdev_passthru_create *r)
{
	free(r->base_bdev_name);
	free(r->name);
}

/* Structure to decode the input parameters for this RPC method. */
static const struct spdk_json_object_decoder rpc_bdev_passthru_create_decoders[] = {
	{"base_bdev_name", offsetof(struct rpc_bdev_passthru_create, base_bdev_name), spdk_json_decode_string},
	{"name", offsetof(struct rpc_bdev_passthru_create, name), spdk_json_decode_string},
};

/* Decode the parameters for this RPC method and properly construct the passthru
 * device. Error status returned in the failed cases.
 */
static void
rpc_bdev_passthru_create(struct spdk_jsonrpc_request *request,
			 const struct spdk_json_val *params)
{
	struct rpc_bdev_passthru_create req = {NULL};
	struct spdk_json_write_ctx *w;
	int rc;

	if (spdk_json_decode_object(params, rpc_bdev_passthru_create_decoders,
				    SPDK_COUNTOF(rpc_bdev_passthru_create_decoders),
				    &req)) {
		SPDK_DEBUGLOG(vbdev_passthru, "spdk_json_decode_object failed\n");
		spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INTERNAL_ERROR,
						 "spdk_json_decode_object failed");
		goto cleanup;
	}

	rc = bdev_passthru_create_disk(req.base_bdev_name, req.name);
	if (rc != 0) {
		spdk_jsonrpc_send_error_response(request, rc, spdk_strerror(-rc));
		goto cleanup;
	}

	w = spdk_jsonrpc_begin_result(request);
	spdk_json_write_string(w, req.name);
	spdk_jsonrpc_end_result(request, w);

cleanup:
	free_rpc_bdev_passthru_create(&req);
}
SPDK_RPC_REGISTER("bdev_passthru_create", rpc_bdev_passthru_create, SPDK_RPC_RUNTIME)

struct rpc_bdev_passthru_delete {
	char *name;
};

static void
free_rpc_bdev_passthru_delete(struct rpc_bdev_passthru_delete *req)
{
	free(req->name);
}

static const struct spdk_json_object_decoder rpc_bdev_passthru_delete_decoders[] = {
	{"name", offsetof(struct rpc_bdev_passthru_delete, name), spdk_json_decode_string},
};

static void
rpc_bdev_passthru_delete_cb(void *cb_arg, int bdeverrno)
{
	struct spdk_jsonrpc_request *request = cb_arg;

	if (bdeverrno == 0) {
		spdk_jsonrpc_send_bool_response(request, true);
	} else {
		spdk_jsonrpc_send_error_response(request, bdeverrno, spdk_strerror(-bdeverrno));
	}
}

static void
rpc_bdev_passthru_delete(struct spdk_jsonrpc_request *request,
			 const struct spdk_json_val *params)
{
	struct rpc_bdev_passthru_delete req = {NULL};

	if (spdk_json_decode_object(params, rpc_bdev_passthru_delete_decoders,
				    SPDK_COUNTOF(rpc_bdev_passthru_delete_decoders),
				    &req)) {
		spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INTERNAL_ERROR,
						 "spdk_json_decode_object failed");
		goto cleanup;
	}

	bdev_passthru_delete_disk(req.name, rpc_bdev_passthru_delete_cb, request);

cleanup:
	free_rpc_bdev_passthru_delete(&req);
}
SPDK_RPC_REGISTER("bdev_passthru_delete", rpc_bdev_passthru_delete, SPDK_RPC_RUNTIME)