[thirdparty/xfsprogs-dev.git] / libxfs / xfs_bmap.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_H__
#define	__XFS_BMAP_H__

struct getbmap;
struct xfs_bmbt_irec;
struct xfs_ifork;
struct xfs_inode;
struct xfs_mount;
struct xfs_trans;

extern kmem_zone_t	*xfs_bmap_free_item_zone;

/*
 * Argument structure for xfs_bmap_alloc.
 */
struct xfs_bmalloca {
	xfs_fsblock_t		*firstblock; /* i/o first block allocated */
	struct xfs_defer_ops	*dfops;	/* bmap freelist */
	struct xfs_trans	*tp;	/* transaction pointer */
	struct xfs_inode	*ip;	/* incore inode pointer */
	struct xfs_bmbt_irec	prev;	/* extent before the new one */
	struct xfs_bmbt_irec	got;	/* extent after, or delayed */

	xfs_fileoff_t		offset;	/* offset in file filling in */
	xfs_extlen_t		length;	/* i/o length asked/allocated */
	xfs_fsblock_t		blkno;	/* starting block of new extent */

	struct xfs_btree_cur	*cur;	/* btree cursor */
	struct xfs_iext_cursor	icur;	/* incore extent cursor */
	int			nallocs;/* number of extents alloc'd */
	int			logflags;/* flags for transaction logging */

	xfs_extlen_t		total;	/* total blocks needed for xaction */
	xfs_extlen_t		minlen;	/* minimum allocation size (blocks) */
	xfs_extlen_t		minleft; /* amount must be left after alloc */
	bool			eof;	/* set if allocating past last extent */
	bool			wasdel;	/* replacing a delayed allocation */
	bool			aeof;	/* allocated space at eof */
	bool			conv;	/* overwriting unwritten extents */
	int			datatype;/* data type being allocated */
	int			flags;
};

/*
 * List of extents to be free "later".
 * The list is kept sorted on xbf_startblock.
 */
struct xfs_extent_free_item
{
	xfs_fsblock_t		xefi_startblock;/* starting fs block number */
	xfs_extlen_t		xefi_blockcount;/* number of blocks in extent */
	struct list_head	xefi_list;
	struct xfs_owner_info	xefi_oinfo;	/* extent owner */
};

#define	XFS_BMAP_MAX_NMAP	4

/*
 * Flags for xfs_bmapi_*
 */
#define XFS_BMAPI_ENTIRE	0x001	/* return entire extent, not trimmed */
#define XFS_BMAPI_METADATA	0x002	/* mapping metadata not user data */
#define XFS_BMAPI_ATTRFORK	0x004	/* use attribute fork not data */
#define XFS_BMAPI_PREALLOC	0x008	/* preallocation op: unwritten space */
#define XFS_BMAPI_IGSTATE	0x010	/* Ignore state - */
					/* combine contig. space */
#define XFS_BMAPI_CONTIG	0x020	/* must allocate only one extent */
/*
 * unwritten extent conversion - this needs write cache flushing and no additional
 * allocation alignments. When specified with XFS_BMAPI_PREALLOC it converts
 * from written to unwritten, otherwise convert from unwritten to written.
 */
#define XFS_BMAPI_CONVERT	0x040

/*
 * allocate zeroed extents - this requires all newly allocated user data extents
 * to be initialised to zero. It will be ignored if XFS_BMAPI_METADATA is set.
 * Use in conjunction with XFS_BMAPI_CONVERT to convert unwritten extents found
 * during the allocation range to zeroed written extents.
 */
#define XFS_BMAPI_ZERO		0x080

/*
 * Map the inode offset to the block given in ap->firstblock.  Primarily
 * used for reflink.  The range must be in a hole, and this flag cannot be
 * turned on with PREALLOC or CONVERT, and cannot be used on the attr fork.
 *
 * For bunmapi, this flag unmaps the range without adjusting quota, reducing
 * refcount, or freeing the blocks.
 */
#define XFS_BMAPI_REMAP		0x100

/* Map something in the CoW fork. */
#define XFS_BMAPI_COWFORK	0x200

/* Only convert delalloc space, don't allocate entirely new extents */
#define XFS_BMAPI_DELALLOC	0x400

/* Only convert unwritten extents, don't allocate new blocks */
#define XFS_BMAPI_CONVERT_ONLY	0x800

#define XFS_BMAPI_FLAGS \
	{ XFS_BMAPI_ENTIRE,	"ENTIRE" }, \
	{ XFS_BMAPI_METADATA,	"METADATA" }, \
	{ XFS_BMAPI_ATTRFORK,	"ATTRFORK" }, \
	{ XFS_BMAPI_PREALLOC,	"PREALLOC" }, \
	{ XFS_BMAPI_IGSTATE,	"IGSTATE" }, \
	{ XFS_BMAPI_CONTIG,	"CONTIG" }, \
	{ XFS_BMAPI_CONVERT,	"CONVERT" }, \
	{ XFS_BMAPI_ZERO,	"ZERO" }, \
	{ XFS_BMAPI_REMAP,	"REMAP" }, \
	{ XFS_BMAPI_COWFORK,	"COWFORK" }, \
	{ XFS_BMAPI_DELALLOC,	"DELALLOC" }, \
	{ XFS_BMAPI_CONVERT_ONLY, "CONVERT_ONLY" }


static inline int xfs_bmapi_aflag(int w)
{
	return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK :
	       (w == XFS_COW_FORK ? XFS_BMAPI_COWFORK : 0));
}

static inline int xfs_bmapi_whichfork(int bmapi_flags)
{
	if (bmapi_flags & XFS_BMAPI_COWFORK)
		return XFS_COW_FORK;
	else if (bmapi_flags & XFS_BMAPI_ATTRFORK)
		return XFS_ATTR_FORK;
	return XFS_DATA_FORK;
}

/*
 * Special values for xfs_bmbt_irec_t br_startblock field.
 */
#define	DELAYSTARTBLOCK		((xfs_fsblock_t)-1LL)
#define	HOLESTARTBLOCK		((xfs_fsblock_t)-2LL)

/*
 * Flags for xfs_bmap_add_extent*.
 */
#define BMAP_LEFT_CONTIG	(1 << 0)
#define BMAP_RIGHT_CONTIG	(1 << 1)
#define BMAP_LEFT_FILLING	(1 << 2)
#define BMAP_RIGHT_FILLING	(1 << 3)
#define BMAP_LEFT_DELAY		(1 << 4)
#define BMAP_RIGHT_DELAY	(1 << 5)
#define BMAP_LEFT_VALID		(1 << 6)
#define BMAP_RIGHT_VALID	(1 << 7)
#define BMAP_ATTRFORK		(1 << 8)
#define BMAP_COWFORK		(1 << 9)

#define XFS_BMAP_EXT_FLAGS \
	{ BMAP_LEFT_CONTIG,	"LC" }, \
	{ BMAP_RIGHT_CONTIG,	"RC" }, \
	{ BMAP_LEFT_FILLING,	"LF" }, \
	{ BMAP_RIGHT_FILLING,	"RF" }, \
	{ BMAP_ATTRFORK,	"ATTR" }, \
	{ BMAP_COWFORK,		"COW" }


/*
 * Return true if the extent is a real, allocated extent, or false if it is  a
 * delayed allocation, and unwritten extent or a hole.
 */
static inline bool xfs_bmap_is_real_extent(struct xfs_bmbt_irec *irec)
{
	return irec->br_state != XFS_EXT_UNWRITTEN &&
		irec->br_startblock != HOLESTARTBLOCK &&
		irec->br_startblock != DELAYSTARTBLOCK &&
		!isnullstartblock(irec->br_startblock);
}

void	xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno,
		xfs_filblks_t len);
void	xfs_trim_extent_eof(struct xfs_bmbt_irec *, struct xfs_inode *);
int	xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
void	xfs_bmap_local_to_extents_empty(struct xfs_inode *ip, int whichfork);
void	xfs_bmap_add_free(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
			  xfs_fsblock_t bno, xfs_filblks_t len,
			  struct xfs_owner_info *oinfo);
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_inode *ip, xfs_fileoff_t *unused,
		int whichfork);
int	xfs_bmap_one_block(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);
int	xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip,
		xfs_fileoff_t bno, xfs_filblks_t len, int flags,
		xfs_fsblock_t *firstblock, xfs_extlen_t total,
		struct xfs_bmbt_irec *mval, int *nmap,
		struct xfs_defer_ops *dfops);
int	__xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip,
		xfs_fileoff_t bno, xfs_filblks_t *rlen, int flags,
		xfs_extnum_t nexts, xfs_fsblock_t *firstblock,
		struct xfs_defer_ops *dfops);
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_defer_ops *dfops, int *done);
int	xfs_bmap_del_extent_delay(struct xfs_inode *ip, int whichfork,
		struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got,
		struct xfs_bmbt_irec *del);
void	xfs_bmap_del_extent_cow(struct xfs_inode *ip,
		struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got,
		struct xfs_bmbt_irec *del);
uint	xfs_default_attroffset(struct xfs_inode *ip);
int	xfs_bmap_collapse_extents(struct xfs_trans *tp, struct xfs_inode *ip,
		xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
		bool *done, xfs_fileoff_t stop_fsb, xfs_fsblock_t *firstblock,
		struct xfs_defer_ops *dfops);
int	xfs_bmap_insert_extents(struct xfs_trans *tp, struct xfs_inode *ip,
		xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
		bool *done, xfs_fileoff_t stop_fsb, xfs_fsblock_t *firstblock,
		struct xfs_defer_ops *dfops);
int	xfs_bmap_split_extent(struct xfs_inode *ip, xfs_fileoff_t split_offset);
int	xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork,
		xfs_fileoff_t off, xfs_filblks_t len, xfs_filblks_t prealloc,
		struct xfs_bmbt_irec *got, struct xfs_iext_cursor *cur,
		int eof);

enum xfs_bmap_intent_type {
	XFS_BMAP_MAP = 1,
	XFS_BMAP_UNMAP,
};

struct xfs_bmap_intent {
	struct list_head			bi_list;
	enum xfs_bmap_intent_type		bi_type;
	struct xfs_inode			*bi_owner;
	int					bi_whichfork;
	struct xfs_bmbt_irec			bi_bmap;
};

int	xfs_bmap_finish_one(struct xfs_trans *tp, struct xfs_defer_ops *dfops,
		struct xfs_inode *ip, enum xfs_bmap_intent_type type,
		int whichfork, xfs_fileoff_t startoff, xfs_fsblock_t startblock,
		xfs_filblks_t *blockcount, xfs_exntst_t state);
int	xfs_bmap_map_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
		struct xfs_inode *ip, struct xfs_bmbt_irec *imap);
int	xfs_bmap_unmap_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
		struct xfs_inode *ip, struct xfs_bmbt_irec *imap);

static inline int xfs_bmap_fork_to_state(int whichfork)
{
	switch (whichfork) {
	case XFS_ATTR_FORK:
		return BMAP_ATTRFORK;
	case XFS_COW_FORK:
		return BMAP_COWFORK;
	default:
		return 0;
	}
}

#endif	/* __XFS_BMAP_H__ */
Commit	Line	Data
2bd0ea18	1	/*
5e656dbb	2	* Copyright (c) 2000-2006 Silicon Graphics, Inc.
f302e9e4	3	* All Rights Reserved.
5000d01d	4	*
f302e9e4 NS	5	* This program is free software; you can redistribute it and/or
f302e9e4 NS	6	* modify it under the terms of the GNU General Public License as
2bd0ea18	7	* published by the Free Software Foundation.
5000d01d	8	*
f302e9e4 NS	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.
5000d01d	13	*
f302e9e4 NS	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
2bd0ea18 NS	17	*/
2bd0ea18 NS	18	#ifndef __XFS_BMAP_H__
dfc130f3	19	#define __XFS_BMAP_H__
2bd0ea18 NS	20
	21	struct getbmap;
	22	struct xfs_bmbt_irec;
5e656dbb	23	struct xfs_ifork;
2bd0ea18 NS	24	struct xfs_inode;
	25	struct xfs_mount;
	26	struct xfs_trans;
	27
5e656dbb BN	28	extern kmem_zone_t *xfs_bmap_free_item_zone;
5e656dbb BN	29
19ebedcf DC	30	/*
	31	* Argument structure for xfs_bmap_alloc.
	32	*/
	33	struct xfs_bmalloca {
	34	xfs_fsblock_t firstblock; / i/o first block allocated */
f33cea1a	35	struct xfs_defer_ops dfops; / bmap freelist */
19ebedcf DC	36	struct xfs_trans tp; / transaction pointer */
	37	struct xfs_inode ip; / incore inode pointer */
	38	struct xfs_bmbt_irec prev; /* extent before the new one */
	39	struct xfs_bmbt_irec got; /* extent after, or delayed */
	40
	41	xfs_fileoff_t offset; /* offset in file filling in */
	42	xfs_extlen_t length; /* i/o length asked/allocated */
	43	xfs_fsblock_t blkno; /* starting block of new extent */
	44
	45	struct xfs_btree_cur cur; / btree cursor */
9788e059	46	struct xfs_iext_cursor icur; /* incore extent cursor */
19ebedcf DC	47	int nallocs;/* number of extents alloc'd */
	48	int logflags;/* flags for transaction logging */
	49
	50	xfs_extlen_t total; /* total blocks needed for xaction */
	51	xfs_extlen_t minlen; /* minimum allocation size (blocks) */
	52	xfs_extlen_t minleft; /* amount must be left after alloc */
	53	bool eof; /* set if allocating past last extent */
	54	bool wasdel; /* replacing a delayed allocation */
19ebedcf DC	55	bool aeof; /* allocated space at eof */
19ebedcf DC	56	bool conv; /* overwriting unwritten extents */
1fccd5c8	57	int datatype;/* data type being allocated */
19ebedcf DC	58	int flags;
	59	};
	60
2bd0ea18 NS	61	/*
	62	* List of extents to be free "later".
	63	* The list is kept sorted on xbf_startblock.
	64	*/
6f530e9a	65	struct xfs_extent_free_item
2bd0ea18	66	{
6f530e9a DW	67	xfs_fsblock_t xefi_startblock;/* starting fs block number */
	68	xfs_extlen_t xefi_blockcount;/* number of blocks in extent */
	69	struct list_head xefi_list;
85aec44f	70	struct xfs_owner_info xefi_oinfo; /* extent owner */
2cf6d225	71	};
2bd0ea18	72
dfc130f3	73	#define XFS_BMAP_MAX_NMAP 4
2bd0ea18 NS	74
2bd0ea18 NS	75	/*
a2ceac1f	76	* Flags for xfs_bmapi_*
2bd0ea18	77	*/
a2ceac1f DC	78	#define XFS_BMAPI_ENTIRE 0x001 /* return entire extent, not trimmed */
	79	#define XFS_BMAPI_METADATA 0x002 /* mapping metadata not user data */
	80	#define XFS_BMAPI_ATTRFORK 0x004 /* use attribute fork not data */
	81	#define XFS_BMAPI_PREALLOC 0x008 /* preallocation op: unwritten space */
	82	#define XFS_BMAPI_IGSTATE 0x010 /* Ignore state - */
2bd0ea18	83	/* combine contig. space */
a2ceac1f	84	#define XFS_BMAPI_CONTIG 0x020 /* must allocate only one extent */
56b2de80 DC	85	/*
	86	* unwritten extent conversion - this needs write cache flushing and no additional
	87	* allocation alignments. When specified with XFS_BMAPI_PREALLOC it converts
	88	* from written to unwritten, otherwise convert from unwritten to written.
	89	*/
a2ceac1f	90	#define XFS_BMAPI_CONVERT 0x040
56b2de80	91
9542ae13 DC	92	/*
	93	* allocate zeroed extents - this requires all newly allocated user data extents
	94	* to be initialised to zero. It will be ignored if XFS_BMAPI_METADATA is set.
	95	* Use in conjunction with XFS_BMAPI_CONVERT to convert unwritten extents found
	96	* during the allocation range to zeroed written extents.
	97	*/
	98	#define XFS_BMAPI_ZERO 0x080
	99
34621a47 DW	100	/*
	101	* Map the inode offset to the block given in ap->firstblock. Primarily
	102	* used for reflink. The range must be in a hole, and this flag cannot be
	103	* turned on with PREALLOC or CONVERT, and cannot be used on the attr fork.
36b16da8 DW	104	*
	105	* For bunmapi, this flag unmaps the range without adjusting quota, reducing
	106	* refcount, or freeing the blocks.
34621a47 DW	107	*/
	108	#define XFS_BMAPI_REMAP 0x100
	109
cb8a004a DW	110	/* Map something in the CoW fork. */
	111	#define XFS_BMAPI_COWFORK 0x200
	112
7075a23f CH	113	/* Only convert delalloc space, don't allocate entirely new extents */
	114	#define XFS_BMAPI_DELALLOC 0x400
	115
8e87c884 CH	116	/* Only convert unwritten extents, don't allocate new blocks */
	117	#define XFS_BMAPI_CONVERT_ONLY 0x800
	118
56b2de80	119	#define XFS_BMAPI_FLAGS \
56b2de80 DC	120	{ XFS_BMAPI_ENTIRE, "ENTIRE" }, \
	121	{ XFS_BMAPI_METADATA, "METADATA" }, \
	122	{ XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \
56b2de80 DC	123	{ XFS_BMAPI_PREALLOC, "PREALLOC" }, \
	124	{ XFS_BMAPI_IGSTATE, "IGSTATE" }, \
	125	{ XFS_BMAPI_CONTIG, "CONTIG" }, \
9542ae13	126	{ XFS_BMAPI_CONVERT, "CONVERT" }, \
34621a47	127	{ XFS_BMAPI_ZERO, "ZERO" }, \
cb8a004a	128	{ XFS_BMAPI_REMAP, "REMAP" }, \
7075a23f	129	{ XFS_BMAPI_COWFORK, "COWFORK" }, \
8e87c884 CH	130	{ XFS_BMAPI_DELALLOC, "DELALLOC" }, \
8e87c884 CH	131	{ XFS_BMAPI_CONVERT_ONLY, "CONVERT_ONLY" }
56b2de80	132
2bd0ea18	133
f302e9e4 NS	134	static inline int xfs_bmapi_aflag(int w)
f302e9e4 NS	135	{
cb8a004a DW	136	return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK :
	137	(w == XFS_COW_FORK ? XFS_BMAPI_COWFORK : 0));
	138	}
	139
	140	static inline int xfs_bmapi_whichfork(int bmapi_flags)
	141	{
	142	if (bmapi_flags & XFS_BMAPI_COWFORK)
	143	return XFS_COW_FORK;
	144	else if (bmapi_flags & XFS_BMAPI_ATTRFORK)
	145	return XFS_ATTR_FORK;
	146	return XFS_DATA_FORK;
f302e9e4	147	}
2bd0ea18 NS	148
	149	/*
	150	* Special values for xfs_bmbt_irec_t br_startblock field.
	151	*/
dfc130f3 RC	152	#define DELAYSTARTBLOCK ((xfs_fsblock_t)-1LL)
dfc130f3 RC	153	#define HOLESTARTBLOCK ((xfs_fsblock_t)-2LL)
2bd0ea18	154
23aab3f9	155	/*
56b2de80	156	* Flags for xfs_bmap_add_extent*.
23aab3f9	157	*/
56b2de80 DC	158	#define BMAP_LEFT_CONTIG (1 << 0)
	159	#define BMAP_RIGHT_CONTIG (1 << 1)
	160	#define BMAP_LEFT_FILLING (1 << 2)
	161	#define BMAP_RIGHT_FILLING (1 << 3)
	162	#define BMAP_LEFT_DELAY (1 << 4)
	163	#define BMAP_RIGHT_DELAY (1 << 5)
	164	#define BMAP_LEFT_VALID (1 << 6)
	165	#define BMAP_RIGHT_VALID (1 << 7)
	166	#define BMAP_ATTRFORK (1 << 8)
cb8a004a	167	#define BMAP_COWFORK (1 << 9)
56b2de80 DC	168
	169	#define XFS_BMAP_EXT_FLAGS \
	170	{ BMAP_LEFT_CONTIG, "LC" }, \
	171	{ BMAP_RIGHT_CONTIG, "RC" }, \
	172	{ BMAP_LEFT_FILLING, "LF" }, \
	173	{ BMAP_RIGHT_FILLING, "RF" }, \
cb8a004a DW	174	{ BMAP_ATTRFORK, "ATTR" }, \
cb8a004a DW	175	{ BMAP_COWFORK, "COW" }
23aab3f9	176
ff105f75	177
cd83dc79 CH	178	/*
	179	* Return true if the extent is a real, allocated extent, or false if it is a
	180	* delayed allocation, and unwritten extent or a hole.
	181	*/
	182	static inline bool xfs_bmap_is_real_extent(struct xfs_bmbt_irec *irec)
	183	{
	184	return irec->br_state != XFS_EXT_UNWRITTEN &&
	185	irec->br_startblock != HOLESTARTBLOCK &&
	186	irec->br_startblock != DELAYSTARTBLOCK &&
	187	!isnullstartblock(irec->br_startblock);
	188	}
	189
b3fd8db7 DW	190	void xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno,
b3fd8db7 DW	191	xfs_filblks_t len);
ca75eb20	192	void xfs_trim_extent_eof(struct xfs_bmbt_irec , struct xfs_inode );
a2ceac1f	193	int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
3f17ed4b	194	void xfs_bmap_local_to_extents_empty(struct xfs_inode *ip, int whichfork);
f33cea1a	195	void xfs_bmap_add_free(struct xfs_mount mp, struct xfs_defer_ops dfops,
85aec44f DW	196	xfs_fsblock_t bno, xfs_filblks_t len,
85aec44f DW	197	struct xfs_owner_info *oinfo);
a2ceac1f DC	198	void xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork);
	199	int xfs_bmap_first_unused(struct xfs_trans tp, struct xfs_inode ip,
	200	xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork);
	201	int xfs_bmap_last_before(struct xfs_trans tp, struct xfs_inode ip,
	202	xfs_fileoff_t *last_block, int whichfork);
ff105f75 DC	203	int xfs_bmap_last_offset(struct xfs_inode ip, xfs_fileoff_t unused,
ff105f75 DC	204	int whichfork);
a2ceac1f	205	int xfs_bmap_one_block(struct xfs_inode *ip, int whichfork);
a2ceac1f DC	206	int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno,
	207	xfs_filblks_t len, struct xfs_bmbt_irec *mval,
	208	int *nmap, int flags);
a2ceac1f DC	209	int xfs_bmapi_write(struct xfs_trans tp, struct xfs_inode ip,
	210	xfs_fileoff_t bno, xfs_filblks_t len, int flags,
	211	xfs_fsblock_t *firstblock, xfs_extlen_t total,
	212	struct xfs_bmbt_irec mval, int nmap,
f33cea1a	213	struct xfs_defer_ops *dfops);
3d36acda DW	214	int __xfs_bunmapi(struct xfs_trans tp, struct xfs_inode ip,
	215	xfs_fileoff_t bno, xfs_filblks_t *rlen, int flags,
	216	xfs_extnum_t nexts, xfs_fsblock_t *firstblock,
	217	struct xfs_defer_ops *dfops);
a2ceac1f DC	218	int xfs_bunmapi(struct xfs_trans tp, struct xfs_inode ip,
	219	xfs_fileoff_t bno, xfs_filblks_t len, int flags,
	220	xfs_extnum_t nexts, xfs_fsblock_t *firstblock,
f33cea1a	221	struct xfs_defer_ops dfops, int done);
ece930fa	222	int xfs_bmap_del_extent_delay(struct xfs_inode *ip, int whichfork,
9788e059 CH	223	struct xfs_iext_cursor cur, struct xfs_bmbt_irec got,
	224	struct xfs_bmbt_irec *del);
	225	void xfs_bmap_del_extent_cow(struct xfs_inode *ip,
	226	struct xfs_iext_cursor cur, struct xfs_bmbt_irec got,
ece930fa	227	struct xfs_bmbt_irec *del);
a2ceac1f	228	uint xfs_default_attroffset(struct xfs_inode *ip);
a9f5d25e	229	int xfs_bmap_collapse_extents(struct xfs_trans tp, struct xfs_inode ip,
19ebedcf	230	xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
a9f5d25e CH	231	bool done, xfs_fileoff_t stop_fsb, xfs_fsblock_t firstblock,
	232	struct xfs_defer_ops *dfops);
	233	int xfs_bmap_insert_extents(struct xfs_trans tp, struct xfs_inode ip,
	234	xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
	235	bool done, xfs_fileoff_t stop_fsb, xfs_fsblock_t firstblock,
	236	struct xfs_defer_ops *dfops);
19ebedcf	237	int xfs_bmap_split_extent(struct xfs_inode *ip, xfs_fileoff_t split_offset);
cc66acaf	238	int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork,
f7b1a8b1	239	xfs_fileoff_t off, xfs_filblks_t len, xfs_filblks_t prealloc,
9788e059 CH	240	struct xfs_bmbt_irec got, struct xfs_iext_cursor cur,
9788e059 CH	241	int eof);
56b2de80	242
34f8f3e1 DW	243	enum xfs_bmap_intent_type {
	244	XFS_BMAP_MAP = 1,
	245	XFS_BMAP_UNMAP,
	246	};
	247
	248	struct xfs_bmap_intent {
	249	struct list_head bi_list;
	250	enum xfs_bmap_intent_type bi_type;
	251	struct xfs_inode *bi_owner;
	252	int bi_whichfork;
	253	struct xfs_bmbt_irec bi_bmap;
	254	};
	255
aeb88300 DW	256	int xfs_bmap_finish_one(struct xfs_trans tp, struct xfs_defer_ops dfops,
	257	struct xfs_inode *ip, enum xfs_bmap_intent_type type,
	258	int whichfork, xfs_fileoff_t startoff, xfs_fsblock_t startblock,
594956fa	259	xfs_filblks_t *blockcount, xfs_exntst_t state);
aeb88300 DW	260	int xfs_bmap_map_extent(struct xfs_mount mp, struct xfs_defer_ops dfops,
	261	struct xfs_inode ip, struct xfs_bmbt_irec imap);
	262	int xfs_bmap_unmap_extent(struct xfs_mount mp, struct xfs_defer_ops dfops,
	263	struct xfs_inode ip, struct xfs_bmbt_irec imap);
	264
7bd43334 CH	265	static inline int xfs_bmap_fork_to_state(int whichfork)
	266	{
	267	switch (whichfork) {
	268	case XFS_ATTR_FORK:
	269	return BMAP_ATTRFORK;
	270	case XFS_COW_FORK:
	271	return BMAP_COWFORK;
	272	default:
	273	return 0;
	274	}
	275	}
	276
2bd0ea18	277	#endif /* __XFS_BMAP_H__ */