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Commit d952e2f8 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Alex Elder
Browse files

xfs: cleanup xfs_bmap.h 



Convert all function prototypes to the short form used elsewhere,
and remove duplicates of comments already placed at the function
body.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarAlex Elder <aelder@sgi.com>
parent b0eab14e

fs/xfs/xfs_bmap.h

+33 −192
Original line number Diff line number Diff line
@@ -155,121 +155,29 @@ typedef struct xfs_bmalloca { 
	{ BMAP_RIGHT_FILLING,	"RF" }, \

	{ BMAP_ATTRFORK,	"ATTR" }



/*

 * Add bmap trace insert entries for all the contents of the extent list.

 *

 * Quite excessive tracing.  Only do this for debug builds.

 */

#if defined(__KERNEL) && defined(DEBUG)

void

xfs_bmap_trace_exlist(

	struct xfs_inode	*ip,		/* incore inode pointer */

	xfs_extnum_t		cnt,		/* count of entries in list */

	int			whichfork,

	unsigned long		caller_ip);	/* data or attr fork */

void	xfs_bmap_trace_exlist(struct xfs_inode *ip, xfs_extnum_t cnt,

		int whichfork, unsigned long caller_ip);

#define	XFS_BMAP_TRACE_EXLIST(ip,c,w)	\

	xfs_bmap_trace_exlist(ip,c,w, _THIS_IP_)

#else

#define	XFS_BMAP_TRACE_EXLIST(ip,c,w)

#endif



/*

 * Convert inode from non-attributed to attributed.

 * Must not be in a transaction, ip must not be locked.

 */

int					/* error code */

xfs_bmap_add_attrfork(

	struct xfs_inode	*ip,	/* incore inode pointer */

	int			size,	/* space needed for new attribute */

	int			rsvd);	/* flag for reserved block allocation */



/*

 * Add the extent to the list of extents to be free at transaction end.

 * The list is maintained sorted (by block number).

 */

void

xfs_bmap_add_free(

	xfs_fsblock_t		bno,		/* fs block number of extent */

	xfs_filblks_t		len,		/* length of extent */

	xfs_bmap_free_t		*flist,		/* list of extents */

	struct xfs_mount	*mp);		/* mount point structure */



/*

 * Routine to clean up the free list data structure when

 * an error occurs during a transaction.

 */

void

xfs_bmap_cancel(

	xfs_bmap_free_t		*flist);	/* free list to clean up */



/*

 * Compute and fill in the value of the maximum depth of a bmap btree

 * in this filesystem.  Done once, during mount.

 */

void

xfs_bmap_compute_maxlevels(

	struct xfs_mount	*mp,	/* file system mount structure */

	int			whichfork);	/* data or attr fork */



/*

 * Returns the file-relative block number of the first unused block in the file.

 * This is the lowest-address hole if the file has holes, else the first block

 * past the end of file.

 */

int						/* error */

xfs_bmap_first_unused(

	struct xfs_trans	*tp,		/* transaction pointer */

	struct xfs_inode	*ip,		/* incore inode */

	xfs_extlen_t		len,		/* size of hole to find */

	xfs_fileoff_t		*unused,	/* unused block num */

	int			whichfork);	/* data or attr fork */



/*

 * Returns the file-relative block number of the last block + 1 before

 * last_block (input value) in the file.

 * This is not based on i_size, it is based on the extent list.

 * Returns 0 for local files, as they do not have an extent list.

 */

int						/* error */

xfs_bmap_last_before(

	struct xfs_trans	*tp,		/* transaction pointer */

	struct xfs_inode	*ip,		/* incore inode */

	xfs_fileoff_t		*last_block,	/* last block */

	int			whichfork);	/* data or attr fork */



/*

 * Returns the file-relative block number of the first block past eof in

 * the file.  This is not based on i_size, it is based on the extent list.

 * Returns 0 for local files, as they do not have an extent list.

 */

int						/* error */

xfs_bmap_last_offset(

	struct xfs_trans	*tp,		/* transaction pointer */

	struct xfs_inode	*ip,		/* incore inode */

	xfs_fileoff_t		*unused,	/* last block num */

	int			whichfork);	/* data or attr fork */



/*

 * Returns whether the selected fork of the inode has exactly one

 * block or not.  For the data fork we check this matches di_size,

 * implying the file's range is 0..bsize-1.

 */

int

xfs_bmap_one_block(

	struct xfs_inode	*ip,		/* incore inode */

	int			whichfork);	/* data or attr fork */



/*

 * Read in the extents to iu_extents.

 * All inode fields are set up by caller, we just traverse the btree

 * and copy the records in.

 */

int						/* error */

xfs_bmap_read_extents(

	struct xfs_trans	*tp,		/* transaction pointer */

	struct xfs_inode	*ip,		/* incore inode */

	int			whichfork);	/* data or attr fork */



int	xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);

void	xfs_bmap_add_free(xfs_fsblock_t bno, xfs_filblks_t len,

		struct xfs_bmap_free *flist, struct xfs_mount *mp);

void	xfs_bmap_cancel(struct xfs_bmap_free *flist);

void	xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork);

int	xfs_bmap_first_unused(struct xfs_trans *tp, struct xfs_inode *ip,

		xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork);

int	xfs_bmap_last_before(struct xfs_trans *tp, struct xfs_inode *ip,

		xfs_fileoff_t *last_block, int whichfork);

int	xfs_bmap_last_offset(struct xfs_trans *tp, struct xfs_inode *ip,

		xfs_fileoff_t *unused, int whichfork);

int	xfs_bmap_one_block(struct xfs_inode *ip, int whichfork);

int	xfs_bmap_read_extents(struct xfs_trans *tp, struct xfs_inode *ip,

		int whichfork);

int	xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno,

		xfs_filblks_t len, struct xfs_bmbt_irec *mval,

		int *nmap, int flags);
@@ -281,95 +189,28 @@ int xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip, 
		xfs_fsblock_t *firstblock, xfs_extlen_t total,

		struct xfs_bmbt_irec *mval, int *nmap,

		struct xfs_bmap_free *flist);



/*

 * Unmap (remove) blocks from a file.

 * If nexts is nonzero then the number of extents to remove is limited to

 * that value.  If not all extents in the block range can be removed then

 * *done is set.

 */

int						/* error */

xfs_bunmapi(

	struct xfs_trans	*tp,		/* transaction pointer */

	struct xfs_inode	*ip,		/* incore inode */

	xfs_fileoff_t		bno,		/* starting offset to unmap */

	xfs_filblks_t		len,		/* length to unmap in file */

	int			flags,		/* XFS_BMAPI_... */

	xfs_extnum_t		nexts,		/* number of extents max */

	xfs_fsblock_t		*firstblock,	/* first allocated block

						   controls a.g. for allocs */

	xfs_bmap_free_t		*flist,		/* i/o: list extents to free */

	int			*done);		/* set if not done yet */



/*

 * Check an extent list, which has just been read, for

 * any bit in the extent flag field.

 */

int

xfs_check_nostate_extents(

	struct xfs_ifork	*ifp,

	xfs_extnum_t		idx,

int	xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip,

		xfs_fileoff_t bno, xfs_filblks_t len, int flags,

		xfs_extnum_t nexts, xfs_fsblock_t *firstblock,

		struct xfs_bmap_free *flist, int *done);

int	xfs_check_nostate_extents(struct xfs_ifork *ifp, xfs_extnum_t idx,

		xfs_extnum_t num);



uint

xfs_default_attroffset(

	struct xfs_inode	*ip);

uint	xfs_default_attroffset(struct xfs_inode *ip);



#ifdef __KERNEL__



/*

 * Routine to be called at transaction's end by xfs_bmapi, xfs_bunmapi

 * caller.  Frees all the extents that need freeing, which must be done

 * last due to locking considerations.

 *

 * Return 1 if the given transaction was committed and a new one allocated,

 * and 0 otherwise.

 */

int						/* error */

xfs_bmap_finish(

	struct xfs_trans	**tp,		/* transaction pointer addr */

	xfs_bmap_free_t		*flist,		/* i/o: list extents to free */

	int			*committed);	/* xact committed or not */



/* bmap to userspace formatter - copy to user & advance pointer */

typedef int (*xfs_bmap_format_t)(void **, struct getbmapx *, int *);



/*

 * Get inode's extents as described in bmv, and format for output.

 */

int						/* error code */

xfs_getbmap(

	xfs_inode_t		*ip,

	struct getbmapx		*bmv,		/* user bmap structure */

	xfs_bmap_format_t	formatter,	/* format to user */

	void			*arg);		/* formatter arg */



/*

 * Check if the endoff is outside the last extent. If so the caller will grow

 * the allocation to a stripe unit boundary

 */

int

xfs_bmap_eof(

	struct xfs_inode        *ip,

	xfs_fileoff_t           endoff,

	int                     whichfork,

	int                     *eof);



/*

 * Count fsblocks of the given fork.

 */

int

xfs_bmap_count_blocks(

	xfs_trans_t		*tp,

	struct xfs_inode	*ip,

	int			whichfork,

	int			*count);



int

xfs_bmap_punch_delalloc_range(

	struct xfs_inode	*ip,

	xfs_fileoff_t		start_fsb,

	xfs_fileoff_t		length);

int	xfs_bmap_finish(struct xfs_trans **tp, struct xfs_bmap_free *flist,

		int *committed);

int	xfs_getbmap(struct xfs_inode *ip, struct getbmapx *bmv,

		xfs_bmap_format_t formatter, void *arg);

int	xfs_bmap_eof(struct xfs_inode *ip, xfs_fileoff_t endoff,

		int whichfork, int *eof);

int	xfs_bmap_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,

		int whichfork, int *count);

int	xfs_bmap_punch_delalloc_range(struct xfs_inode *ip,

		xfs_fileoff_t start_fsb, xfs_fileoff_t length);

#endif	/* __KERNEL__ */



#endif	/* __XFS_BMAP_H__ */