/*
 * Copyright (c) 2004-2005 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_LINUX_H__
#define __XFS_LINUX_H__

#include <uuid/uuid.h>
#include <sys/vfs.h>
#include <sys/ioctl.h>
#include <sys/param.h>
#include <sys/sysmacros.h>
#include <sys/stat.h>
#include <inttypes.h>
#include <malloc.h>
#include <getopt.h>
#include <errno.h>
#include <endian.h>
#include <stdbool.h>
#include <asm/types.h>
#include <mntent.h>

static __inline__ int xfsctl(const char *path, int fd, int cmd, void *p)
{
	return ioctl(fd, cmd, p);
}

/*
 * platform_test_xfs_*() implies that xfsctl will succeed on the file;
 * on Linux, at least, special files don't get xfs file ops,
 * so return 0 for those
 */

static __inline__ int platform_test_xfs_fd(int fd)
{
	struct statfs statfsbuf;
	struct stat statbuf;

	if (fstatfs(fd, &statfsbuf) < 0)
		return 0;
	if (fstat(fd, &statbuf) < 0)
		return 0;
	if (!S_ISREG(statbuf.st_mode) && !S_ISDIR(statbuf.st_mode))
		return 0;
	return (statfsbuf.f_type == 0x58465342);	/* XFSB */
}

static __inline__ int platform_test_xfs_path(const char *path)
{
	struct statfs statfsbuf;
	struct stat statbuf;

	if (statfs(path, &statfsbuf) < 0)
		return 0;
	if (stat(path, &statbuf) < 0)
		return 0;
	if (!S_ISREG(statbuf.st_mode) && !S_ISDIR(statbuf.st_mode))
		return 0;
	return (statfsbuf.f_type == 0x58465342);	/* XFSB */
}

static __inline__ int platform_fstatfs(int fd, struct statfs *buf)
{
	return fstatfs(fd, buf);
}

static __inline__ void platform_getoptreset(void)
{
	extern int optind;
	optind = 0;
}

static __inline__ int platform_uuid_compare(uuid_t *uu1, uuid_t *uu2)
{
	return uuid_compare(*uu1, *uu2);
}

static __inline__ void platform_uuid_unparse(uuid_t *uu, char *buffer)
{
	uuid_unparse(*uu, buffer);
}

static __inline__ int platform_uuid_parse(char *buffer, uuid_t *uu)
{
	return uuid_parse(buffer, *uu);
}

static __inline__ int platform_uuid_is_null(uuid_t *uu)
{
	return uuid_is_null(*uu);
}

static __inline__ void platform_uuid_generate(uuid_t *uu)
{
	uuid_generate(*uu);
}

static __inline__ void platform_uuid_clear(uuid_t *uu)
{
	uuid_clear(*uu);
}

static __inline__ void platform_uuid_copy(uuid_t *dst, uuid_t *src)
{
	uuid_copy(*dst, *src);
}

#ifndef BLKDISCARD
#define BLKDISCARD	_IO(0x12,119)
#endif

static __inline__ int
platform_discard_blocks(int fd, uint64_t start, uint64_t len)
{
	__uint64_t range[2] = { start, len };

	if (ioctl(fd, BLKDISCARD, &range) < 0)
		return errno;
	return 0;
}

#if (__GLIBC__ < 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ <= 1))
# define constpp	const char * const *
#else
# define constpp	char * const *
#endif

#define ENOATTR		ENODATA	/* Attribute not found */
#define EFSCORRUPTED	EUCLEAN	/* Filesystem is corrupted */
#define EFSBADCRC	EBADMSG	/* Bad CRC detected */

typedef loff_t		xfs_off_t;
typedef __uint64_t	xfs_ino_t;
typedef __uint32_t	xfs_dev_t;
typedef __int64_t	xfs_daddr_t;

/**
 * Abstraction of mountpoints.
 */
struct mntent_cursor {
	FILE *mtabp;
};

static inline int platform_mntent_open(struct mntent_cursor * cursor, char *mtab)
{
	cursor->mtabp = setmntent(mtab, "r");
	if (!cursor->mtabp) {
		fprintf(stderr, "Error: cannot read %s\n", mtab);
		return 1;
	}
	return 0;
}

static inline struct mntent * platform_mntent_next(struct mntent_cursor * cursor)
{
	return getmntent(cursor->mtabp);
}

static inline void platform_mntent_close(struct mntent_cursor * cursor)
{
	endmntent(cursor->mtabp);
}

#endif	/* __XFS_LINUX_H__ */