numam-spdk/lib/bdev/rpc/bdev_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 "spdk/log.h"
#include "spdk/rpc.h"

#include "spdk_internal/bdev.h"

static void
spdk_rpc_get_bdevs(struct spdk_jsonrpc_request *request,
		   const struct spdk_json_val *params)
{
	struct spdk_json_write_ctx *w;
	struct spdk_bdev *bdev;

	if (params != NULL) {
		spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS,
						 "get_bdevs requires no parameters");
		return;
	}

	w = spdk_jsonrpc_begin_result(request);
	if (w == NULL) {
		return;
	}

	spdk_json_write_array_begin(w);

	for (bdev = spdk_bdev_first(); bdev != NULL; bdev = spdk_bdev_next(bdev)) {
		spdk_json_write_object_begin(w);

		spdk_json_write_name(w, "name");
		spdk_json_write_string(w, spdk_bdev_get_name(bdev));

		spdk_json_write_name(w, "product_name");
		spdk_json_write_string(w, spdk_bdev_get_product_name(bdev));

		spdk_json_write_name(w, "block_size");
		spdk_json_write_uint32(w, spdk_bdev_get_block_size(bdev));

		spdk_json_write_name(w, "num_blocks");
		spdk_json_write_uint64(w, spdk_bdev_get_num_blocks(bdev));

		spdk_json_write_name(w, "bdev_opened_for_write");
		spdk_json_write_bool(w, bdev->bdev_opened_for_write);

		spdk_json_write_name(w, "vbdevs_opened_for_write");
		spdk_json_write_uint32(w, bdev->vbdevs_opened_for_write);

		spdk_json_write_name(w, "driver_specific");
		spdk_json_write_object_begin(w);
		spdk_bdev_dump_config_json(bdev, w);
		spdk_json_write_object_end(w);

		spdk_json_write_object_end(w);
	}
	spdk_json_write_array_end(w);

	spdk_jsonrpc_end_result(request, w);
}
SPDK_RPC_REGISTER("get_bdevs", spdk_rpc_get_bdevs)


struct rpc_delete_bdev {
	char *name;
};

static void
free_rpc_delete_bdev(struct rpc_delete_bdev *r)
{
	free(r->name);
}

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

static void
spdk_rpc_delete_bdev(struct spdk_jsonrpc_request *request,
		     const struct spdk_json_val *params)
{
	struct rpc_delete_bdev req = {};
	struct spdk_bdev *bdev;
	struct spdk_json_write_ctx *w;

	if (spdk_json_decode_object(params, rpc_delete_bdev_decoders,
				    sizeof(rpc_delete_bdev_decoders) / sizeof(*rpc_delete_bdev_decoders),
				    &req)) {
		SPDK_ERRLOG("spdk_json_decode_object failed\n");
		goto invalid;
	}

	if (req.name == NULL) {
		SPDK_ERRLOG("missing name param\n");
		goto invalid;
	}

	bdev = spdk_bdev_get_by_name(req.name);
	if (bdev == NULL) {
		SPDK_ERRLOG("bdev '%s' does not exist\n", req.name);
		goto invalid;
	}

	spdk_bdev_unregister(bdev);

	free_rpc_delete_bdev(&req);

	w = spdk_jsonrpc_begin_result(request);
	if (w == NULL) {
		return;
	}

	spdk_json_write_bool(w, true);
	spdk_jsonrpc_end_result(request, w);
	return;

invalid:
	spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS, "Invalid parameters");
	free_rpc_delete_bdev(&req);
}
SPDK_RPC_REGISTER("delete_bdev", spdk_rpc_delete_bdev)