xfs_fs.h

linux得一些常用命令,以及linux环境下的c编程

/*
 * Structures returned from ioctl XFS_IOC_FSBULKSTAT & XFS_IOC_FSBULKSTAT_SINGLE
 */
typedef struct xfs_bstime {
	time_t		tv_sec;		/* seconds		*/
	__s32		tv_nsec;	/* and nanoseconds	*/
} xfs_bstime_t;

typedef struct xfs_bstat {
	__u64		bs_ino;		/* inode number			*/
	__u16		bs_mode;	/* type and mode		*/
	__u16		bs_nlink;	/* number of links		*/
	__u32		bs_uid;		/* user id			*/
	__u32		bs_gid;		/* group id			*/
	__u32		bs_rdev;	/* device value			*/
	__s32		bs_blksize;	/* block size			*/
	__s64		bs_size;	/* file size			*/
	xfs_bstime_t	bs_atime;	/* access time			*/
	xfs_bstime_t	bs_mtime;	/* modify time			*/
	xfs_bstime_t	bs_ctime;	/* inode change time		*/
	int64_t		bs_blocks;	/* number of blocks		*/
	__u32		bs_xflags;	/* extended flags		*/
	__s32		bs_extsize;	/* extent size			*/
	__s32		bs_extents;	/* number of extents		*/
	__u32		bs_gen;		/* generation count		*/
	__u16		bs_projid;	/* project id			*/
	unsigned char	bs_pad[14];	/* pad space, unused		*/
	__u32		bs_dmevmask;	/* DMIG event mask		*/
	__u16		bs_dmstate;	/* DMIG state info		*/
	__u16		bs_aextents;	/* attribute number of extents	*/
} xfs_bstat_t;

/*
 * The user-level BulkStat Request interface structure.
 */
typedef struct xfs_fsop_bulkreq {
	__u64		*lastip;	/* last inode # pointer		*/
	__s32		icount;		/* count of entries in buffer	*/
	void		*ubuffer;	/* user buffer for inode desc.	*/
	__s32		*ocount;	/* output count pointer		*/
} xfs_fsop_bulkreq_t;


/*
 * Structures returned from xfs_inumbers routine (XFS_IOC_FSINUMBERS).
 */
typedef struct xfs_inogrp {
	__u64		xi_startino;	/* starting inode number	*/
	__s32		xi_alloccount;	/* # bits set in allocmask	*/
	__u64		xi_allocmask;	/* mask of allocated inodes	*/
} xfs_inogrp_t;


/*
 * Error injection.
 */
typedef struct xfs_error_injection {
	__s32           fd;
	__s32           errtag;
} xfs_error_injection_t;


/*
 * The user-level Handle Request interface structure.
 */
typedef struct xfs_fsop_handlereq {
	__u32		fd;		/* fd for FD_TO_HANDLE		*/
	void		*path;		/* user pathname		*/
	__u32		oflags;		/* open flags			*/
	void		*ihandle;	/* user supplied handle		*/
	__u32		ihandlen;	/* user supplied length		*/
	void		*ohandle;	/* user buffer for handle	*/
	__u32		*ohandlen;	/* user buffer length		*/
} xfs_fsop_handlereq_t;

/*
 * Compound structures for passing args through Handle Request interfaces
 * xfs_fssetdm_by_handle, xfs_attrlist_by_handle, xfs_attrmulti_by_handle
 * - ioctls: XFS_IOC_FSSETDM_BY_HANDLE, XFS_IOC_ATTRLIST_BY_HANDLE, and
 *           XFS_IOC_ATTRMULTI_BY_HANDLE
 */

typedef struct xfs_fsop_setdm_handlereq {
	struct xfs_fsop_handlereq hreq; /* handle interface structure */
	struct fsdmidata *data;	        /* DMAPI data to set          */
} xfs_fsop_setdm_handlereq_t;

typedef struct xfs_attrlist_cursor {
	__u32	opaque[4];
} xfs_attrlist_cursor_t;

typedef struct xfs_fsop_attrlist_handlereq {
	struct xfs_fsop_handlereq hreq; /* handle interface structure */
	struct xfs_attrlist_cursor pos; /* opaque cookie, list offset */
	__u32 flags;                    /* flags, use ROOT/USER names */
	__u32 buflen;                   /* length of buffer supplied  */
	void *buffer;                   /* attrlist data to return    */
} xfs_fsop_attrlist_handlereq_t;

typedef struct xfs_attr_multiop {
	__u32	am_opcode;
	__s32	am_error;
	void	*am_attrname;
	void	*am_attrvalue;
	__u32	am_length;
	__u32	am_flags;
} xfs_attr_multiop_t;

typedef struct xfs_fsop_attrmulti_handlereq {
	struct xfs_fsop_handlereq hreq; /* handle interface structure */
	__u32 opcount;                  /* count of following multiop */
	struct xfs_attr_multiop *ops;   /* attr_multi data to get/set */
} xfs_fsop_attrmulti_handlereq_t;

/*
 * File system identifier. Should be unique (at least per machine).
 */
typedef struct {
	__u32 val[2];			/* file system id type */
} xfs_fsid_t;

/*
 * File identifier.  Should be unique per filesystem on a single machine.
 * This is typically called by a stateless file server in order to generate
 * "file handles".
 */
#define MAXFIDSZ        46
typedef struct fid {
	__u16		fid_len;		/* length of data in bytes */
	unsigned char	fid_data[MAXFIDSZ];	/* data (variable length)  */
} fid_t;

typedef struct xfs_fid {
	__u16	xfs_fid_len;		/* length of remainder	*/
	__u16	xfs_fid_pad;
	__u32	xfs_fid_gen;		/* generation number	*/
	__u64	xfs_fid_ino;		/* 64 bits inode number	*/
} xfs_fid_t;

typedef struct xfs_fid2 {
	__u16	fid_len;	/* length of remainder */
	__u16	fid_pad;	/* padding, must be zero */
	__u32	fid_gen;	/* generation number */
	__u64	fid_ino;	/* inode number */
} xfs_fid2_t;

typedef struct xfs_handle {
	union {
		__s64	    align;	/* force alignment of ha_fid	 */
		xfs_fsid_t  _ha_fsid;	/* unique file system identifier */
	} ha_u;
	xfs_fid_t	ha_fid;		/* file system specific file ID  */
} xfs_handle_t;
#define ha_fsid ha_u._ha_fsid

#define	XFS_HSIZE(handle)	(((char *) &(handle).ha_fid.xfs_fid_pad  \
				 - (char *) &(handle))			  \
				 + (handle).ha_fid.xfs_fid_len)

#define XFS_HANDLE_CMP(h1, h2)	bcmp(h1, h2, sizeof (xfs_handle_t))

#define FSHSIZE		sizeof (fsid_t)


/*
 * ioctl commands that replace IRIX fcntl()'s
 * For 'documentation' purposed more than anything else,
 * the "cmd #" field reflects the IRIX fcntl number.
 */
#define	XFS_IOC_ALLOCSP		_IOW ('X', 10, struct xfs_flock64)
#define	XFS_IOC_FREESP		_IOW ('X', 11, struct xfs_flock64)
#define	XFS_IOC_DIOINFO		_IOR ('X', 30, struct dioattr)
#define	XFS_IOC_FSGETXATTR	_IOR ('X', 31, struct fsxattr)
#define	XFS_IOC_FSSETXATTR	_IOW ('X', 32, struct fsxattr)
#define	XFS_IOC_ALLOCSP64	_IOW ('X', 36, struct xfs_flock64)
#define	XFS_IOC_FREESP64	_IOW ('X', 37, struct xfs_flock64)
#define	XFS_IOC_GETBMAP		_IOWR('X', 38, struct getbmap)
#define	XFS_IOC_FSSETDM		_IOW ('X', 39, struct fsdmidata)
#define	XFS_IOC_RESVSP		_IOW ('X', 40, struct xfs_flock64)
#define	XFS_IOC_UNRESVSP	_IOW ('X', 41, struct xfs_flock64)
#define	XFS_IOC_RESVSP64	_IOW ('X', 42, struct xfs_flock64)
#define	XFS_IOC_UNRESVSP64	_IOW ('X', 43, struct xfs_flock64)
#define	XFS_IOC_GETBMAPA	_IOWR('X', 44, struct getbmap)
#define	XFS_IOC_FSGETXATTRA	_IOR ('X', 45, struct fsxattr)
/*      XFS_IOC_SETBIOSIZE ---- deprecated 46      */
/*      XFS_IOC_GETBIOSIZE ---- deprecated 47      */
#define	XFS_IOC_GETBMAPX	_IOWR('X', 56, struct getbmap)

/*
 * ioctl commands that replace IRIX syssgi()'s
 */
#define	XFS_IOC_FSGEOMETRY	     _IOR ('X', 100, struct xfs_fsop_geom)
#define	XFS_IOC_FSBULKSTAT	     _IOWR('X', 101, struct xfs_fsop_bulkreq)
#define	XFS_IOC_FSBULKSTAT_SINGLE    _IOWR('X', 102, struct xfs_fsop_bulkreq)
#define	XFS_IOC_FSINUMBERS	     _IOWR('X', 103, struct xfs_fsop_bulkreq)
#define	XFS_IOC_PATH_TO_FSHANDLE     _IOWR('X', 104, struct xfs_fsop_handlereq)
#define	XFS_IOC_PATH_TO_HANDLE	     _IOWR('X', 105, struct xfs_fsop_handlereq)
#define	XFS_IOC_FD_TO_HANDLE	     _IOWR('X', 106, struct xfs_fsop_handlereq)
#define	XFS_IOC_OPEN_BY_HANDLE	     _IOWR('X', 107, struct xfs_fsop_handlereq)
#define	XFS_IOC_READLINK_BY_HANDLE   _IOWR('X', 108, struct xfs_fsop_handlereq)
#define XFS_IOC_SWAPEXT		     _IOWR('X', 109, struct xfs_swapext)
#define	XFS_IOC_FSGROWFSDATA	     _IOW ('X', 110, struct xfs_growfs_data)
#define	XFS_IOC_FSGROWFSLOG	     _IOW ('X', 111, struct xfs_growfs_log)
#define	XFS_IOC_FSGROWFSRT	     _IOW ('X', 112, struct xfs_growfs_rt)
#define	XFS_IOC_FSCOUNTS	     _IOR ('X', 113, struct xfs_fsop_counts)
#define	XFS_IOC_SET_RESBLKS	     _IOR ('X', 114, struct xfs_fsop_resblks)
#define	XFS_IOC_GET_RESBLKS	     _IOR ('X', 115, struct xfs_fsop_resblks)
#define XFS_IOC_ERROR_INJECTION      _IOW ('X', 116, struct xfs_error_injection)
#define XFS_IOC_ERROR_CLEARALL       _IOW ('X', 117, struct xfs_error_injection)
/*      XFS_IOC_ATTRCTL_BY_HANDLE -- deprecated 118      */
#define XFS_IOC_FREEZE		     _IOWR('X', 119, int)
#define XFS_IOC_THAW		     _IOWR('X', 120, int)
#define	XFS_IOC_FSSETDM_BY_HANDLE    _IOW ('X', 121, struct xfs_fsop_setdm_handlereq)
#define	XFS_IOC_ATTRLIST_BY_HANDLE   _IOW ('X', 122, struct xfs_fsop_attrlist_handlereq)
#define	XFS_IOC_ATTRMULTI_BY_HANDLE  _IOW ('X', 123, struct xfs_fsop_attrmulti_handlereq)
/*      XFS_IOC_GETFSUUID ---------- deprecated 140      */


/*
 * Block I/O parameterization.  A basic block (BB) is the lowest size of
 * filesystem allocation, and must equal 512.  Length units given to bio
 * routines are in BB's.
 */
#define	BBSHIFT		9
#define	BBSIZE		(1<<BBSHIFT)
#define	BBMASK		(BBSIZE-1)
#define	BTOBB(bytes)	(((__u64)(bytes) + BBSIZE - 1) >> BBSHIFT)
#define	BTOBBT(bytes)	((__u64)(bytes) >> BBSHIFT)
#define	BBTOB(bbs)	((bbs) << BBSHIFT)
#define OFFTOBB(bytes)	(((__u64)(bytes) + BBSIZE - 1) >> BBSHIFT)
#define	OFFTOBBT(bytes)	((__u64)(bytes) >> BBSHIFT)
#define	BBTOOFF(bbs)	((__u64)(bbs) << BBSHIFT)     
     
#define SEEKLIMIT32	0x7fffffff
#define BBSEEKLIMIT32	BTOBBT(SEEKLIMIT32)
#define SEEKLIMIT	0x7fffffffffffffffLL
#define BBSEEKLIMIT	OFFTOBBT(SEEKLIMIT)     

#endif	/* _LINUX_XFS_FS_H */