[linux.git] / fs / xfs / xfs_bmap_util.h

/*
 * Copyright (c) 2000-2006 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 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 General Public License for more details.
 *
 * You should have received a copy of the GNU 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_BMAP_UTIL_H__
#define	__XFS_BMAP_UTIL_H__

/* Kernel only BMAP related definitions and functions */

struct xfs_bmbt_irec;
struct xfs_extent_free_item;
struct xfs_ifork;
struct xfs_inode;
struct xfs_mount;
struct xfs_trans;
struct xfs_bmalloca;

#ifdef CONFIG_XFS_RT
int	xfs_bmap_rtalloc(struct xfs_bmalloca *ap);
#else /* !CONFIG_XFS_RT */
/*
 * Attempts to allocate RT extents when RT is disable indicates corruption and
 * should trigger a shutdown.
 */
static inline int
xfs_bmap_rtalloc(struct xfs_bmalloca *ap)
{
	return -EFSCORRUPTED;
}
#endif /* CONFIG_XFS_RT */

int	xfs_bmap_eof(struct xfs_inode *ip, xfs_fileoff_t endoff,
		     int whichfork, int *eof);
int	xfs_bmap_punch_delalloc_range(struct xfs_inode *ip,
		xfs_fileoff_t start_fsb, xfs_fileoff_t length);

struct kgetbmap {
	__s64		bmv_offset;	/* file offset of segment in blocks */
	__s64		bmv_block;	/* starting block (64-bit daddr_t)  */
	__s64		bmv_length;	/* length of segment, blocks	    */
	__s32		bmv_oflags;	/* output flags */
};
int	xfs_getbmap(struct xfs_inode *ip, struct getbmapx *bmv,
		struct kgetbmap *out);

/* functions in xfs_bmap.c that are only needed by xfs_bmap_util.c */
int	xfs_bmap_extsize_align(struct xfs_mount *mp, struct xfs_bmbt_irec *gotp,
			       struct xfs_bmbt_irec *prevp, xfs_extlen_t extsz,
			       int rt, int eof, int delay, int convert,
			       xfs_fileoff_t *offp, xfs_extlen_t *lenp);
void	xfs_bmap_adjacent(struct xfs_bmalloca *ap);
int	xfs_bmap_last_extent(struct xfs_trans *tp, struct xfs_inode *ip,
			     int whichfork, struct xfs_bmbt_irec *rec,
			     int *is_empty);

/* preallocation and hole punch interface */
int	xfs_alloc_file_space(struct xfs_inode *ip, xfs_off_t offset,
			     xfs_off_t len, int alloc_type);
int	xfs_free_file_space(struct xfs_inode *ip, xfs_off_t offset,
			    xfs_off_t len);
int	xfs_zero_file_space(struct xfs_inode *ip, xfs_off_t offset,
			    xfs_off_t len);
int	xfs_collapse_file_space(struct xfs_inode *, xfs_off_t offset,
				xfs_off_t len);
int	xfs_insert_file_space(struct xfs_inode *, xfs_off_t offset,
				xfs_off_t len);

/* EOF block manipulation functions */
bool	xfs_can_free_eofblocks(struct xfs_inode *ip, bool force);
int	xfs_free_eofblocks(struct xfs_inode *ip);

int	xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip,
			 struct xfs_swapext *sx);

xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);

xfs_extnum_t xfs_bmap_count_leaves(struct xfs_ifork *ifp, xfs_filblks_t *count);
int xfs_bmap_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
			  int whichfork, xfs_extnum_t *nextents,
			  xfs_filblks_t *count);

#endif	/* __XFS_BMAP_UTIL_H__ */
Commit	Line	Data
68988114 DC	1	/*
	2	* Copyright (c) 2000-2006 Silicon Graphics, Inc.
	3	* All Rights Reserved.
	4	*
	5	* This program is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU General Public License as
	7	* published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	17	*/
	18	#ifndef __XFS_BMAP_UTIL_H__
	19	#define __XFS_BMAP_UTIL_H__
	20
	21	/* Kernel only BMAP related definitions and functions */
	22
	23	struct xfs_bmbt_irec;
310a75a3	24	struct xfs_extent_free_item;
68988114 DC	25	struct xfs_ifork;
	26	struct xfs_inode;
	27	struct xfs_mount;
	28	struct xfs_trans;
9799b438	29	struct xfs_bmalloca;
68988114	30
bb9c2e54	31	#ifdef CONFIG_XFS_RT
68988114	32	int xfs_bmap_rtalloc(struct xfs_bmalloca *ap);
bb9c2e54 DC	33	#else /* !CONFIG_XFS_RT */
	34	/*
	35	* Attempts to allocate RT extents when RT is disable indicates corruption and
	36	* should trigger a shutdown.
	37	*/
	38	static inline int
	39	xfs_bmap_rtalloc(struct xfs_bmalloca *ap)
	40	{
	41	return -EFSCORRUPTED;
	42	}
	43	#endif /* CONFIG_XFS_RT */
	44
68988114 DC	45	int xfs_bmap_eof(struct xfs_inode *ip, xfs_fileoff_t endoff,
68988114 DC	46	int whichfork, int *eof);
68988114 DC	47	int xfs_bmap_punch_delalloc_range(struct xfs_inode *ip,
	48	xfs_fileoff_t start_fsb, xfs_fileoff_t length);
	49
232b5194 CH	50	struct kgetbmap {
	51	__s64 bmv_offset; /* file offset of segment in blocks */
	52	__s64 bmv_block; /* starting block (64-bit daddr_t) */
	53	__s64 bmv_length; /* length of segment, blocks */
	54	__s32 bmv_oflags; /* output flags */
	55	};
68988114	56	int xfs_getbmap(struct xfs_inode ip, struct getbmapx bmv,
232b5194	57	struct kgetbmap *out);
68988114 DC	58
68988114 DC	59	/* functions in xfs_bmap.c that are only needed by xfs_bmap_util.c */
68988114 DC	60	int xfs_bmap_extsize_align(struct xfs_mount mp, struct xfs_bmbt_irec gotp,
	61	struct xfs_bmbt_irec *prevp, xfs_extlen_t extsz,
	62	int rt, int eof, int delay, int convert,
	63	xfs_fileoff_t offp, xfs_extlen_t lenp);
	64	void xfs_bmap_adjacent(struct xfs_bmalloca *ap);
	65	int xfs_bmap_last_extent(struct xfs_trans tp, struct xfs_inode ip,
	66	int whichfork, struct xfs_bmbt_irec *rec,
	67	int *is_empty);
	68
c24b5dfa	69	/* preallocation and hole punch interface */
83aee9e4 CH	70	int xfs_alloc_file_space(struct xfs_inode *ip, xfs_off_t offset,
	71	xfs_off_t len, int alloc_type);
	72	int xfs_free_file_space(struct xfs_inode *ip, xfs_off_t offset,
	73	xfs_off_t len);
865e9446 CH	74	int xfs_zero_file_space(struct xfs_inode *ip, xfs_off_t offset,
865e9446 CH	75	xfs_off_t len);
e1d8fb88 NJ	76	int xfs_collapse_file_space(struct xfs_inode *, xfs_off_t offset,
e1d8fb88 NJ	77	xfs_off_t len);
a904b1ca NJ	78	int xfs_insert_file_space(struct xfs_inode *, xfs_off_t offset,
a904b1ca NJ	79	xfs_off_t len);
c24b5dfa DC	80
	81	/* EOF block manipulation functions */
	82	bool xfs_can_free_eofblocks(struct xfs_inode *ip, bool force);
a36b9261	83	int xfs_free_eofblocks(struct xfs_inode *ip);
c24b5dfa	84
a133d952 DC	85	int xfs_swap_extents(struct xfs_inode ip, struct xfs_inode tip,
	86	struct xfs_swapext *sx);
	87
68988114 DC	88	xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
68988114 DC	89
e17a5c6f	90	xfs_extnum_t xfs_bmap_count_leaves(struct xfs_ifork ifp, xfs_filblks_t count);
e7f5d5ca DW	91	int xfs_bmap_count_blocks(struct xfs_trans tp, struct xfs_inode ip,
	92	int whichfork, xfs_extnum_t *nextents,
	93	xfs_filblks_t *count);
	94
68988114	95	#endif /* __XFS_BMAP_UTIL_H__ */