/*

 * Copyright (C) 2017 Red Hat, Inc.

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 *

 * Author: Gris Ge <fge@redhat.com>

 */

#ifndef __ISCSI_USR_MISC_H__

#define __ISCSI_USR_MISC_H__

#include <stdint.h>

#include <stdbool.h>

#include <assert.h>

#include <stdarg.h>

#include <dirent.h>

#include <net/if.h>

#include "libopeniscsiusr/libopeniscsiusr.h"

#define _good(rc, rc_val, out) \

	do { \

		rc_val = rc; \

		if (rc_val != LIBISCSI_OK) \

			goto out; \

	} while(0)

#define _asprintf(...) \

	(asprintf(__VA_ARGS__) == -1 ? LIBISCSI_ERR_NOMEM : LIBISCSI_OK)

__DLL_LOCAL void _iscsi_log(struct iscsi_context *ctx, int priority,

			    const char *file, int line, const char *func_name,

			    const char *format, ...);

__DLL_LOCAL void _iscsi_log_stderr(struct iscsi_context *ctx, int priority,

				   const char *file, int line,

				   const char *func_name, const char *format,

				   va_list args);

#define _iscsi_log_cond(ctx, prio, arg...) \

	do { \

		if ((ctx != NULL) && \

		    (iscsi_context_log_priority_get(ctx) >= prio)) \

			_iscsi_log(ctx, prio, __FILE__, __LINE__, \

				   __FUNCTION__, ## arg); \

	} while (0)

#define _debug(ctx, arg...) \

	_iscsi_log_cond(ctx, LIBISCSI_LOG_PRIORITY_DEBUG, ## arg)

#define _info(ctx, arg...) \

	_iscsi_log_cond(ctx, LIBISCSI_LOG_PRIORITY_INFO, ## arg)

#define _warn(ctx, arg...) \

	_iscsi_log_cond(ctx, LIBISCSI_LOG_PRIORITY_WARNING, ## arg)

#define _error(ctx, arg...) \

	_iscsi_log_cond(ctx, LIBISCSI_LOG_PRIORITY_ERROR, ## arg)

#define _iscsi_getter_func_gen(struct_name, prop_name, prop_type) \

	prop_type struct_name##_##prop_name##_get(struct struct_name *d) \

	{ \

		assert(d != NULL); \

		return d->prop_name; \

	}

/*

 * Check pointer returned by malloc() or strdup() or calloc(), if NULL, set

 * rc as LIBISCSI_ERR_NO_MEMORY, report error and goto goto_out.

 */

#define _alloc_null_check(ctx, ptr, rc, goto_out) \

	do { \

		if (ptr == NULL) { \

			rc = LIBISCSI_ERR_NOMEM; \

			_error(ctx, iscsi_strerror(rc)); \

			goto goto_out; \

		} \

	} while(0)

#define _STRERR_BUFF_LEN	1024

#define _strerror(err_no, buff) \

	strerror_r(err_no, buff, _STRERR_BUFF_LEN)

/* Workaround for suppress GCC 8 `stringop-truncation` warnings. */

#define _strncpy(dst, src, size) \

	do { \

		memcpy(dst, src, \

		       (size_t) size > strlen(src) ? \

		       strlen(src) : (size_t) size); \

		* (char *) (dst + \

			    ((size_t) size - 1 > strlen(src) ? \

			     strlen(src) : (size_t) (size - 1))) = '\0'; \

	} while(0)

__DLL_LOCAL int _scan_filter_skip_dot(const struct dirent *dir);

__DLL_LOCAL bool _file_exists(const char *path);

#define _ETH_DRIVER_NAME_MAX_LEN	32

/* ^ Defined in linux/ethtool.h `struct ethtool_drvinfo`. */

struct _eth_if {

	char driver_name[_ETH_DRIVER_NAME_MAX_LEN];

	char if_name[IF_NAMESIZE];

};

__DLL_LOCAL int _eth_ifs_get(struct iscsi_context *ctx,

			     struct _eth_if ***eifs, uint32_t *eif_count);

__DLL_LOCAL void _eth_ifs_free(struct _eth_if **eifs, uint32_t eif_count);

__DLL_LOCAL int _scandir(struct iscsi_context *ctx, const char *dir_path,

			 struct dirent ***namelist, int *count);

__DLL_LOCAL void _scandir_free(struct dirent **namelist, int count);

#endif /* End of __ISCSI_USR_MISC_H__ */