/*   SPDX-License-Identifier: BSD-3-Clause
 *   Copyright (C) 2017 Intel Corporation.
 *   All rights reserved.
 */

#include "spdk/stdinc.h"
#include "spdk/string.h"
#include "spdk/rpc.h"
#include "spdk/util.h"
#include "spdk/string.h"
#include "spdk/log.h"
#include "vbdev_error.h"

static int
rpc_error_bdev_decode_io_type(const struct spdk_json_val *val, void *out)
{
	uint32_t *io_type = out;

	if (spdk_json_strequal(val, "read") == true) {
		*io_type = SPDK_BDEV_IO_TYPE_READ;
	} else if (spdk_json_strequal(val, "write") == true) {
		*io_type = SPDK_BDEV_IO_TYPE_WRITE;
	} else if (spdk_json_strequal(val, "flush") == true) {
		*io_type = SPDK_BDEV_IO_TYPE_FLUSH;
	} else if (spdk_json_strequal(val, "unmap") == true) {
		*io_type = SPDK_BDEV_IO_TYPE_UNMAP;
	} else if (spdk_json_strequal(val, "all") == true) {
		*io_type = 0xffffffff;
	} else if (spdk_json_strequal(val, "clear") == true) {
		*io_type = 0;
	} else {
		SPDK_NOTICELOG("Invalid parameter value: io_type\n");
		return -EINVAL;
	}

	return 0;
}

static int
rpc_error_bdev_decode_error_type(const struct spdk_json_val *val, void *out)
{
	uint32_t *error_type = out;

	if (spdk_json_strequal(val, "failure") == true) {
		*error_type = VBDEV_IO_FAILURE;
	} else if (spdk_json_strequal(val, "pending") == true) {
		*error_type = VBDEV_IO_PENDING;
	} else if (spdk_json_strequal(val, "corrupt_data") == true) {
		*error_type = VBDEV_IO_CORRUPT_DATA;
	} else {
		SPDK_NOTICELOG("Invalid parameter value: error_type\n");
		return -EINVAL;
	}

	return 0;
}

struct rpc_bdev_error_create {
	char *base_name;
	char *uuid;
};

static void
free_rpc_bdev_error_create(struct rpc_bdev_error_create *req)
{
	free(req->base_name);
	free(req->uuid);
}

static const struct spdk_json_object_decoder rpc_bdev_error_create_decoders[] = {
	{"base_name", offsetof(struct rpc_bdev_error_create, base_name), spdk_json_decode_string},
	{"uuid", offsetof(struct rpc_bdev_error_create, uuid), spdk_json_decode_string, true},
};

static void
rpc_bdev_error_create(struct spdk_jsonrpc_request *request,
		      const struct spdk_json_val *params)
{
	struct rpc_bdev_error_create req = {};
	struct spdk_uuid *uuid = NULL;
	struct spdk_uuid decoded_uuid;
	int rc = 0;

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

	if (req.uuid) {
		if (spdk_uuid_parse(&decoded_uuid, req.uuid)) {
			spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS,
							 "Failed to parse bdev UUID");
			goto cleanup;
		}
		uuid = &decoded_uuid;
	}

	rc = vbdev_error_create(req.base_name, uuid);
	if (rc) {
		spdk_jsonrpc_send_error_response(request, rc, spdk_strerror(-rc));
		goto cleanup;
	}

	spdk_jsonrpc_send_bool_response(request, true);

cleanup:
	free_rpc_bdev_error_create(&req);
}
SPDK_RPC_REGISTER("bdev_error_create", rpc_bdev_error_create, SPDK_RPC_RUNTIME)

struct rpc_delete_error {
	char *name;
};

static void
free_rpc_delete_error(struct rpc_delete_error *r)
{
	free(r->name);
}

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

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

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

	vbdev_error_delete(req.name, rpc_bdev_error_delete_cb, request);

cleanup:
	free_rpc_delete_error(&req);
}
SPDK_RPC_REGISTER("bdev_error_delete", rpc_bdev_error_delete, SPDK_RPC_RUNTIME)

struct rpc_error_information {
	char *name;
	struct vbdev_error_inject_opts opts;
};

static const struct spdk_json_object_decoder rpc_error_information_decoders[] = {
	{"name", offsetof(struct rpc_error_information, name), spdk_json_decode_string},
	{"io_type", offsetof(struct rpc_error_information, opts.io_type), rpc_error_bdev_decode_io_type},
	{"error_type", offsetof(struct rpc_error_information, opts.error_type), rpc_error_bdev_decode_error_type},
	{"num", offsetof(struct rpc_error_information, opts.error_num), spdk_json_decode_uint32, true},
	{"corrupt_offset", offsetof(struct rpc_error_information, opts.corrupt_offset), spdk_json_decode_uint64, true},
	{"corrupt_value", offsetof(struct rpc_error_information, opts.corrupt_value), spdk_json_decode_uint8, true},
};

static void
free_rpc_error_information(struct rpc_error_information *p)
{
	free(p->name);
}

static void
rpc_bdev_error_inject_error(struct spdk_jsonrpc_request *request,
			    const struct spdk_json_val *params)
{
	struct rpc_error_information req = {.opts.error_num = 1};
	int rc = 0;

	if (spdk_json_decode_object(params, rpc_error_information_decoders,
				    SPDK_COUNTOF(rpc_error_information_decoders),
				    &req)) {
		SPDK_ERRLOG("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 = vbdev_error_inject_error(req.name, &req.opts);
	if (rc) {
		spdk_jsonrpc_send_error_response(request, rc, spdk_strerror(-rc));
		goto cleanup;
	}

	spdk_jsonrpc_send_bool_response(request, true);

cleanup:
	free_rpc_error_information(&req);
}
SPDK_RPC_REGISTER("bdev_error_inject_error", rpc_bdev_error_inject_error, SPDK_RPC_RUNTIME)