/* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */


#ifndef _LINUX_NILFS2_API_H
#define _LINUX_NILFS2_API_H

#include <linux/types.h>
#include <linux/ioctl.h>


struct nilfs_cpinfo {
	__u32 ci_flags;
	__u32 ci_pad;
	__u64 ci_cno;
	__u64 ci_create;
	__u64 ci_nblk_inc;
	__u64 ci_inodes_count;
	__u64 ci_blocks_count;
	__u64 ci_next;
};


enum {
	NILFS_CPINFO_SNAPSHOT,
	NILFS_CPINFO_INVALID,
	NILFS_CPINFO_SKETCH,
	NILFS_CPINFO_MINOR,
};

#define NILFS_CPINFO_FNS(flag, name)					\
static inline int							\
nilfs_cpinfo_##name(const struct nilfs_cpinfo *cpinfo)			\
{									\
	return !!(cpinfo->ci_flags & (1UL << NILFS_CPINFO_##flag));	\
}

NILFS_CPINFO_FNS(SNAPSHOT, snapshot)
NILFS_CPINFO_FNS(INVALID, invalid)
NILFS_CPINFO_FNS(MINOR, minor)


struct nilfs_suinfo {
	__u64 sui_lastmod;
	__u32 sui_nblocks;
	__u32 sui_flags;
};


enum {
	NILFS_SUINFO_ACTIVE,
	NILFS_SUINFO_DIRTY,
	NILFS_SUINFO_ERROR,
};

#define NILFS_SUINFO_FNS(flag, name)					\
static inline int							\
nilfs_suinfo_##name(const struct nilfs_suinfo *si)			\
{									\
	return si->sui_flags & (1UL << NILFS_SUINFO_##flag);		\
}

NILFS_SUINFO_FNS(ACTIVE, active)
NILFS_SUINFO_FNS(DIRTY, dirty)
NILFS_SUINFO_FNS(ERROR, error)

static inline int nilfs_suinfo_clean(const struct nilfs_suinfo *si)
{
	return !si->sui_flags;
}


struct nilfs_suinfo_update {
	__u64 sup_segnum;
	__u32 sup_flags;
	__u32 sup_reserved;
	struct nilfs_suinfo sup_sui;
};

enum {
	NILFS_SUINFO_UPDATE_LASTMOD,
	NILFS_SUINFO_UPDATE_NBLOCKS,
	NILFS_SUINFO_UPDATE_FLAGS,
	__NR_NILFS_SUINFO_UPDATE_FIELDS,
};

#define NILFS_SUINFO_UPDATE_FNS(flag, name)				\
static inline void							\
nilfs_suinfo_update_set_##name(struct nilfs_suinfo_update *sup)		\
{									\
	sup->sup_flags |= 1UL << NILFS_SUINFO_UPDATE_##flag;		\
}									\
static inline void							\
nilfs_suinfo_update_clear_##name(struct nilfs_suinfo_update *sup)	\
{									\
	sup->sup_flags &= ~(1UL << NILFS_SUINFO_UPDATE_##flag);		\
}									\
static inline int							\
nilfs_suinfo_update_##name(const struct nilfs_suinfo_update *sup)	\
{									\
	return !!(sup->sup_flags & (1UL << NILFS_SUINFO_UPDATE_##flag));\
}

NILFS_SUINFO_UPDATE_FNS(LASTMOD, lastmod)
NILFS_SUINFO_UPDATE_FNS(NBLOCKS, nblocks)
NILFS_SUINFO_UPDATE_FNS(FLAGS, flags)

enum {
	NILFS_CHECKPOINT,
	NILFS_SNAPSHOT,
};


struct nilfs_cpmode {
	__u64 cm_cno;
	__u32 cm_mode;
	__u32 cm_pad;
};


struct nilfs_argv {
	__u64 v_base;
	__u32 v_nmembs;	
	__u16 v_size;	
	__u16 v_flags;
	__u64 v_index;
};


struct nilfs_period {
	__u64 p_start;
	__u64 p_end;
};


struct nilfs_cpstat {
	__u64 cs_cno;
	__u64 cs_ncps;
	__u64 cs_nsss;
};


struct nilfs_sustat {
	__u64 ss_nsegs;
	__u64 ss_ncleansegs;
	__u64 ss_ndirtysegs;
	__u64 ss_ctime;
	__u64 ss_nongc_ctime;
	__u64 ss_prot_seq;
};


struct nilfs_vinfo {
	__u64 vi_vblocknr;
	__u64 vi_start;
	__u64 vi_end;
	__u64 vi_blocknr;
};


struct nilfs_vdesc {
	__u64 vd_ino;
	__u64 vd_cno;
	__u64 vd_vblocknr;
	struct nilfs_period vd_period;
	__u64 vd_blocknr;
	__u64 vd_offset;
	__u32 vd_flags;
	__u32 vd_pad;
};


struct nilfs_bdesc {
	__u64 bd_ino;
	__u64 bd_oblocknr;
	__u64 bd_blocknr;
	__u64 bd_offset;
	__u32 bd_level;
	__u32 bd_pad;
};

#define NILFS_IOCTL_IDENT	'n'

#define NILFS_IOCTL_CHANGE_CPMODE					\
	_IOW(NILFS_IOCTL_IDENT, 0x80, struct nilfs_cpmode)
#define NILFS_IOCTL_DELETE_CHECKPOINT					\
	_IOW(NILFS_IOCTL_IDENT, 0x81, __u64)
#define NILFS_IOCTL_GET_CPINFO						\
	_IOR(NILFS_IOCTL_IDENT, 0x82, struct nilfs_argv)
#define NILFS_IOCTL_GET_CPSTAT						\
	_IOR(NILFS_IOCTL_IDENT, 0x83, struct nilfs_cpstat)
#define NILFS_IOCTL_GET_SUINFO						\
	_IOR(NILFS_IOCTL_IDENT, 0x84, struct nilfs_argv)
#define NILFS_IOCTL_GET_SUSTAT						\
	_IOR(NILFS_IOCTL_IDENT, 0x85, struct nilfs_sustat)
#define NILFS_IOCTL_GET_VINFO						\
	_IOWR(NILFS_IOCTL_IDENT, 0x86, struct nilfs_argv)
#define NILFS_IOCTL_GET_BDESCS						\
	_IOWR(NILFS_IOCTL_IDENT, 0x87, struct nilfs_argv)
#define NILFS_IOCTL_CLEAN_SEGMENTS					\
	_IOW(NILFS_IOCTL_IDENT, 0x88, struct nilfs_argv[5])
#define NILFS_IOCTL_SYNC						\
	_IOR(NILFS_IOCTL_IDENT, 0x8A, __u64)
#define NILFS_IOCTL_RESIZE						\
	_IOW(NILFS_IOCTL_IDENT, 0x8B, __u64)
#define NILFS_IOCTL_SET_ALLOC_RANGE					\
	_IOW(NILFS_IOCTL_IDENT, 0x8C, __u64[2])
#define NILFS_IOCTL_SET_SUINFO						\
	_IOW(NILFS_IOCTL_IDENT, 0x8D, struct nilfs_argv)

#endif 
