include/uapi/linux/nilfs2_api.h - kernel/msm-4.9 - Gitiles

 /*
  * nilfs2_api.h - NILFS2 user space API
  *
  * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
  *
  * 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; either version 2.1 of the License, or
  * (at your option) any later version.
  */

 #ifndef _LINUX_NILFS2_API_H
 #define _LINUX_NILFS2_API_H

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

 /**
  * struct nilfs_cpinfo - checkpoint information
  * @ci_flags: flags
  * @ci_pad: padding
  * @ci_cno: checkpoint number
  * @ci_create: creation timestamp
  * @ci_nblk_inc: number of blocks incremented by this checkpoint
  * @ci_inodes_count: inodes count
  * @ci_blocks_count: blocks count
  * @ci_next: next checkpoint number in snapshot list
  */
 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;
 };

 /* checkpoint flags */
 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)

 /**
  * nilfs_suinfo - segment usage information
  * @sui_lastmod: timestamp of last modification
  * @sui_nblocks: number of written blocks in segment
  * @sui_flags: segment usage flags
  */
 struct nilfs_suinfo {
 	__u64 sui_lastmod;
 	__u32 sui_nblocks;
 	__u32 sui_flags;
 };

 /* segment usage 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;
 }

 /**
  * nilfs_suinfo_update - segment usage information update
  * @sup_segnum: segment number
  * @sup_flags: flags for which fields are active in sup_sui
  * @sup_reserved: reserved necessary for alignment
  * @sup_sui: segment usage information
  */
 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 - change checkpoint mode structure
  * @cm_cno: checkpoint number
  * @cm_mode: mode of checkpoint
  * @cm_pad: padding
  */
 struct nilfs_cpmode {
 	__u64 cm_cno;
 	__u32 cm_mode;
 	__u32 cm_pad;
 };

 /**
  * struct nilfs_argv - argument vector
  * @v_base: pointer on data array from userspace
  * @v_nmembs: number of members in data array
  * @v_size: size of data array in bytes
  * @v_flags: flags
  * @v_index: start number of target data items
  */
 struct nilfs_argv {
 	__u64 v_base;
 	__u32 v_nmembs;	/* number of members */
 	__u16 v_size;	/* size of members */
 	__u16 v_flags;
 	__u64 v_index;
 };

 /**
  * struct nilfs_period - period of checkpoint numbers
  * @p_start: start checkpoint number (inclusive)
  * @p_end: end checkpoint number (exclusive)
  */
 struct nilfs_period {
 	__u64 p_start;
 	__u64 p_end;
 };

 /**
  * struct nilfs_cpstat - checkpoint statistics
  * @cs_cno: checkpoint number
  * @cs_ncps: number of checkpoints
  * @cs_nsss: number of snapshots
  */
 struct nilfs_cpstat {
 	__u64 cs_cno;
 	__u64 cs_ncps;
 	__u64 cs_nsss;
 };

 /**
  * struct nilfs_sustat - segment usage statistics
  * @ss_nsegs: number of segments
  * @ss_ncleansegs: number of clean segments
  * @ss_ndirtysegs: number of dirty segments
  * @ss_ctime: creation time of the last segment
  * @ss_nongc_ctime: creation time of the last segment not for GC
  * @ss_prot_seq: least sequence number of segments which must not be reclaimed
  */
 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 - virtual block number information
  * @vi_vblocknr: virtual block number
  * @vi_start: start checkpoint number (inclusive)
  * @vi_end: end checkpoint number (exclusive)
  * @vi_blocknr: disk block number
  */
 struct nilfs_vinfo {
 	__u64 vi_vblocknr;
 	__u64 vi_start;
 	__u64 vi_end;
 	__u64 vi_blocknr;
 };

 /**
  * struct nilfs_vdesc - descriptor of virtual block number
  * @vd_ino: inode number
  * @vd_cno: checkpoint number
  * @vd_vblocknr: virtual block number
  * @vd_period: period of checkpoint numbers
  * @vd_blocknr: disk block number
  * @vd_offset: logical block offset inside a file
  * @vd_flags: flags (data or node block)
  * @vd_pad: padding
  */
 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 - descriptor of disk block number
  * @bd_ino: inode number
  * @bd_oblocknr: disk block address (for skipping dead blocks)
  * @bd_blocknr: disk block address
  * @bd_offset: logical block offset inside a file
  * @bd_level: level in the b-tree organization
  * @bd_pad: padding
  */
 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 /* _LINUX_NILFS2_API_H */
	/*
	* nilfs2_api.h - NILFS2 user space API
	*
	* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
	*
	* 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; either version 2.1 of the License, or
	* (at your option) any later version.
	*/

	#ifndef _LINUX_NILFS2_API_H
	#define _LINUX_NILFS2_API_H

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

	/**
	* struct nilfs_cpinfo - checkpoint information
	* @ci_flags: flags
	* @ci_pad: padding
	* @ci_cno: checkpoint number
	* @ci_create: creation timestamp
	* @ci_nblk_inc: number of blocks incremented by this checkpoint
	* @ci_inodes_count: inodes count
	* @ci_blocks_count: blocks count
	* @ci_next: next checkpoint number in snapshot list
	*/
	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;
	};

	/* checkpoint flags */
	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)

	/**
	* nilfs_suinfo - segment usage information
	* @sui_lastmod: timestamp of last modification
	* @sui_nblocks: number of written blocks in segment
	* @sui_flags: segment usage flags
	*/
	struct nilfs_suinfo {
	__u64 sui_lastmod;
	__u32 sui_nblocks;
	__u32 sui_flags;
	};

	/* segment usage 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;
	}

	/**
	* nilfs_suinfo_update - segment usage information update
	* @sup_segnum: segment number
	* @sup_flags: flags for which fields are active in sup_sui
	* @sup_reserved: reserved necessary for alignment
	* @sup_sui: segment usage information
	*/
	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 - change checkpoint mode structure
	* @cm_cno: checkpoint number
	* @cm_mode: mode of checkpoint
	* @cm_pad: padding
	*/
	struct nilfs_cpmode {
	__u64 cm_cno;
	__u32 cm_mode;
	__u32 cm_pad;
	};

	/**
	* struct nilfs_argv - argument vector
	* @v_base: pointer on data array from userspace
	* @v_nmembs: number of members in data array
	* @v_size: size of data array in bytes
	* @v_flags: flags
	* @v_index: start number of target data items
	*/
	struct nilfs_argv {
	__u64 v_base;
	__u32 v_nmembs; /* number of members */
	__u16 v_size; /* size of members */
	__u16 v_flags;
	__u64 v_index;
	};

	/**
	* struct nilfs_period - period of checkpoint numbers
	* @p_start: start checkpoint number (inclusive)
	* @p_end: end checkpoint number (exclusive)
	*/
	struct nilfs_period {
	__u64 p_start;
	__u64 p_end;
	};

	/**
	* struct nilfs_cpstat - checkpoint statistics
	* @cs_cno: checkpoint number
	* @cs_ncps: number of checkpoints
	* @cs_nsss: number of snapshots
	*/
	struct nilfs_cpstat {
	__u64 cs_cno;
	__u64 cs_ncps;
	__u64 cs_nsss;
	};

	/**
	* struct nilfs_sustat - segment usage statistics
	* @ss_nsegs: number of segments
	* @ss_ncleansegs: number of clean segments
	* @ss_ndirtysegs: number of dirty segments
	* @ss_ctime: creation time of the last segment
	* @ss_nongc_ctime: creation time of the last segment not for GC
	* @ss_prot_seq: least sequence number of segments which must not be reclaimed
	*/
	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 - virtual block number information
	* @vi_vblocknr: virtual block number
	* @vi_start: start checkpoint number (inclusive)
	* @vi_end: end checkpoint number (exclusive)
	* @vi_blocknr: disk block number
	*/
	struct nilfs_vinfo {
	__u64 vi_vblocknr;
	__u64 vi_start;
	__u64 vi_end;
	__u64 vi_blocknr;
	};

	/**
	* struct nilfs_vdesc - descriptor of virtual block number
	* @vd_ino: inode number
	* @vd_cno: checkpoint number
	* @vd_vblocknr: virtual block number
	* @vd_period: period of checkpoint numbers
	* @vd_blocknr: disk block number
	* @vd_offset: logical block offset inside a file
	* @vd_flags: flags (data or node block)
	* @vd_pad: padding
	*/
	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 - descriptor of disk block number
	* @bd_ino: inode number
	* @bd_oblocknr: disk block address (for skipping dead blocks)
	* @bd_blocknr: disk block address
	* @bd_offset: logical block offset inside a file
	* @bd_level: level in the b-tree organization
	* @bd_pad: padding
	*/
	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 /* _LINUX_NILFS2_API_H */