[linux-2.6-block.git] / fs / xfs / libxfs / xfs_bmap.h

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#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 {
	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 */
	bool			xefi_skip_discard;
};

#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_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

/* Skip online discard of freed extents */
#define XFS_BMAPI_NODISCARD	0x1000

/* Do not update the rmap btree.  Used for reconstructing bmbt from rmapbt. */
#define XFS_BMAPI_NORMAP	0x2000

#define XFS_BMAPI_FLAGS \
	{ XFS_BMAPI_ENTIRE,	"ENTIRE" }, \
	{ XFS_BMAPI_METADATA,	"METADATA" }, \
	{ XFS_BMAPI_ATTRFORK,	"ATTRFORK" }, \
	{ XFS_BMAPI_PREALLOC,	"PREALLOC" }, \
	{ 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" }, \
	{ XFS_BMAPI_NODISCARD,	"NODISCARD" }, \
	{ XFS_BMAPI_NORMAP,	"NORMAP" }


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, bool skip_discard);
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_extlen_t total, struct xfs_bmbt_irec *mval, int *nmap);
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);
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, 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);
int	xfs_bmap_can_insert_extents(struct xfs_inode *ip, xfs_fileoff_t off,
		xfs_fileoff_t shift);
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);
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);

static inline 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)
{
	__xfs_bmap_add_free(mp, dfops, bno, len, oinfo, false);
}

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;
	}
}

xfs_failaddr_t xfs_bmap_validate_extent(struct xfs_inode *ip, int whichfork,
		struct xfs_bmbt_irec *irec);

int	xfs_bmapi_remap(struct xfs_trans *tp, struct xfs_inode *ip,
		xfs_fileoff_t bno, xfs_filblks_t len, xfs_fsblock_t startblock,
		int flags);

#endif	/* __XFS_BMAP_H__ */
Commit	Line	Data
0b61f8a4	1	// SPDX-License-Identifier: GPL-2.0
1da177e4	2	/*
3e57ecf6	3	* Copyright (c) 2000-2006 Silicon Graphics, Inc.
7b718769	4	* All Rights Reserved.
1da177e4 LT	5	*/
	6	#ifndef __XFS_BMAP_H__
	7	#define __XFS_BMAP_H__
	8
	9	struct getbmap;
	10	struct xfs_bmbt_irec;
4eea22f0	11	struct xfs_ifork;
1da177e4 LT	12	struct xfs_inode;
	13	struct xfs_mount;
	14	struct xfs_trans;
	15
a8272ce0 DC	16	extern kmem_zone_t *xfs_bmap_free_item_zone;
a8272ce0 DC	17
9799b438 DC	18	/*
	19	* Argument structure for xfs_bmap_alloc.
	20	*/
	21	struct xfs_bmalloca {
9799b438 DC	22	struct xfs_trans tp; / transaction pointer */
	23	struct xfs_inode ip; / incore inode pointer */
	24	struct xfs_bmbt_irec prev; /* extent before the new one */
	25	struct xfs_bmbt_irec got; /* extent after, or delayed */
	26
	27	xfs_fileoff_t offset; /* offset in file filling in */
	28	xfs_extlen_t length; /* i/o length asked/allocated */
	29	xfs_fsblock_t blkno; /* starting block of new extent */
	30
	31	struct xfs_btree_cur cur; / btree cursor */
b2b1712a	32	struct xfs_iext_cursor icur; /* incore extent cursor */
9799b438 DC	33	int nallocs;/* number of extents alloc'd */
	34	int logflags;/* flags for transaction logging */
	35
	36	xfs_extlen_t total; /* total blocks needed for xaction */
	37	xfs_extlen_t minlen; /* minimum allocation size (blocks) */
	38	xfs_extlen_t minleft; /* amount must be left after alloc */
	39	bool eof; /* set if allocating past last extent */
	40	bool wasdel; /* replacing a delayed allocation */
9799b438 DC	41	bool aeof; /* allocated space at eof */
9799b438 DC	42	bool conv; /* overwriting unwritten extents */
292378ed	43	int datatype;/* data type being allocated */
9799b438 DC	44	int flags;
	45	};
	46
1da177e4 LT	47	/*
	48	* List of extents to be free "later".
	49	* The list is kept sorted on xbf_startblock.
	50	*/
310a75a3	51	struct xfs_extent_free_item
1da177e4	52	{
310a75a3 DW	53	xfs_fsblock_t xefi_startblock;/* starting fs block number */
	54	xfs_extlen_t xefi_blockcount;/* number of blocks in extent */
	55	struct list_head xefi_list;
340785cc	56	struct xfs_owner_info xefi_oinfo; /* extent owner */
fcb762f5	57	bool xefi_skip_discard;
e66a4c67	58	};
1da177e4	59
1da177e4 LT	60	#define XFS_BMAP_MAX_NMAP 4
	61
	62	/*
c0dc7828	63	* Flags for xfs_bmapi_*
1da177e4	64	*/
c0dc7828 DC	65	#define XFS_BMAPI_ENTIRE 0x001 /* return entire extent, not trimmed */
	66	#define XFS_BMAPI_METADATA 0x002 /* mapping metadata not user data */
	67	#define XFS_BMAPI_ATTRFORK 0x004 /* use attribute fork not data */
	68	#define XFS_BMAPI_PREALLOC 0x008 /* preallocation op: unwritten space */
c0dc7828	69	#define XFS_BMAPI_CONTIG 0x020 /* must allocate only one extent */
44722352 DC	70	/*
	71	* unwritten extent conversion - this needs write cache flushing and no additional
	72	* allocation alignments. When specified with XFS_BMAPI_PREALLOC it converts
	73	* from written to unwritten, otherwise convert from unwritten to written.
	74	*/
c0dc7828	75	#define XFS_BMAPI_CONVERT 0x040
1da177e4	76
3fbbbea3 DC	77	/*
	78	* allocate zeroed extents - this requires all newly allocated user data extents
	79	* to be initialised to zero. It will be ignored if XFS_BMAPI_METADATA is set.
	80	* Use in conjunction with XFS_BMAPI_CONVERT to convert unwritten extents found
	81	* during the allocation range to zeroed written extents.
	82	*/
	83	#define XFS_BMAPI_ZERO 0x080
	84
f65306ea DW	85	/*
	86	* Map the inode offset to the block given in ap->firstblock. Primarily
	87	* used for reflink. The range must be in a hole, and this flag cannot be
	88	* turned on with PREALLOC or CONVERT, and cannot be used on the attr fork.
4847acf8 DW	89	*
	90	* For bunmapi, this flag unmaps the range without adjusting quota, reducing
	91	* refcount, or freeing the blocks.
f65306ea DW	92	*/
	93	#define XFS_BMAPI_REMAP 0x100
	94
3993baeb DW	95	/* Map something in the CoW fork. */
	96	#define XFS_BMAPI_COWFORK 0x200
	97
d2b3964a CH	98	/* Only convert delalloc space, don't allocate entirely new extents */
	99	#define XFS_BMAPI_DELALLOC 0x400
	100
b121459c CH	101	/* Only convert unwritten extents, don't allocate new blocks */
	102	#define XFS_BMAPI_CONVERT_ONLY 0x800
	103
fcb762f5 BF	104	/* Skip online discard of freed extents */
	105	#define XFS_BMAPI_NODISCARD 0x1000
	106
95eb308c DW	107	/* Do not update the rmap btree. Used for reconstructing bmbt from rmapbt. */
	108	#define XFS_BMAPI_NORMAP 0x2000
	109
0b1b213f	110	#define XFS_BMAPI_FLAGS \
0b1b213f CH	111	{ XFS_BMAPI_ENTIRE, "ENTIRE" }, \
0b1b213f CH	112	{ XFS_BMAPI_METADATA, "METADATA" }, \
0b1b213f	113	{ XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \
0b1b213f	114	{ XFS_BMAPI_PREALLOC, "PREALLOC" }, \
0b1b213f	115	{ XFS_BMAPI_CONTIG, "CONTIG" }, \
3fbbbea3	116	{ XFS_BMAPI_CONVERT, "CONVERT" }, \
f65306ea	117	{ XFS_BMAPI_ZERO, "ZERO" }, \
3993baeb	118	{ XFS_BMAPI_REMAP, "REMAP" }, \
d2b3964a	119	{ XFS_BMAPI_COWFORK, "COWFORK" }, \
b121459c	120	{ XFS_BMAPI_DELALLOC, "DELALLOC" }, \
fcb762f5	121	{ XFS_BMAPI_CONVERT_ONLY, "CONVERT_ONLY" }, \
95eb308c DW	122	{ XFS_BMAPI_NODISCARD, "NODISCARD" }, \
95eb308c DW	123	{ XFS_BMAPI_NORMAP, "NORMAP" }
0b1b213f CH	124
0b1b213f CH	125
a844f451 NS	126	static inline int xfs_bmapi_aflag(int w)
a844f451 NS	127	{
3993baeb DW	128	return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK :
	129	(w == XFS_COW_FORK ? XFS_BMAPI_COWFORK : 0));
	130	}
	131
	132	static inline int xfs_bmapi_whichfork(int bmapi_flags)
	133	{
	134	if (bmapi_flags & XFS_BMAPI_COWFORK)
	135	return XFS_COW_FORK;
	136	else if (bmapi_flags & XFS_BMAPI_ATTRFORK)
	137	return XFS_ATTR_FORK;
	138	return XFS_DATA_FORK;
a844f451	139	}
1da177e4 LT	140
	141	/*
	142	* Special values for xfs_bmbt_irec_t br_startblock field.
	143	*/
	144	#define DELAYSTARTBLOCK ((xfs_fsblock_t)-1LL)
	145	#define HOLESTARTBLOCK ((xfs_fsblock_t)-2LL)
	146
7574aa92 CH	147	/*
	148	* Flags for xfs_bmap_add_extent*.
	149	*/
	150	#define BMAP_LEFT_CONTIG (1 << 0)
	151	#define BMAP_RIGHT_CONTIG (1 << 1)
	152	#define BMAP_LEFT_FILLING (1 << 2)
	153	#define BMAP_RIGHT_FILLING (1 << 3)
	154	#define BMAP_LEFT_DELAY (1 << 4)
	155	#define BMAP_RIGHT_DELAY (1 << 5)
	156	#define BMAP_LEFT_VALID (1 << 6)
	157	#define BMAP_RIGHT_VALID (1 << 7)
6ef35544	158	#define BMAP_ATTRFORK (1 << 8)
3993baeb	159	#define BMAP_COWFORK (1 << 9)
7574aa92	160
0b1b213f CH	161	#define XFS_BMAP_EXT_FLAGS \
	162	{ BMAP_LEFT_CONTIG, "LC" }, \
	163	{ BMAP_RIGHT_CONTIG, "RC" }, \
	164	{ BMAP_LEFT_FILLING, "LF" }, \
	165	{ BMAP_RIGHT_FILLING, "RF" }, \
3993baeb DW	166	{ BMAP_ATTRFORK, "ATTR" }, \
3993baeb DW	167	{ BMAP_COWFORK, "COW" }
1da177e4	168
e1d8fb88	169
9c4f29d3 CH	170	/*
	171	* Return true if the extent is a real, allocated extent, or false if it is a
	172	* delayed allocation, and unwritten extent or a hole.
	173	*/
	174	static inline bool xfs_bmap_is_real_extent(struct xfs_bmbt_irec *irec)
	175	{
	176	return irec->br_state != XFS_EXT_UNWRITTEN &&
	177	irec->br_startblock != HOLESTARTBLOCK &&
	178	irec->br_startblock != DELAYSTARTBLOCK &&
	179	!isnullstartblock(irec->br_startblock);
	180	}
	181
0a0af28c DW	182	void xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno,
0a0af28c DW	183	xfs_filblks_t len);
40214d12	184	void xfs_trim_extent_eof(struct xfs_bmbt_irec , struct xfs_inode );
d952e2f8	185	int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
f3508bcd	186	void xfs_bmap_local_to_extents_empty(struct xfs_inode *ip, int whichfork);
fcb762f5	187	void __xfs_bmap_add_free(struct xfs_mount mp, struct xfs_defer_ops dfops,
340785cc	188	xfs_fsblock_t bno, xfs_filblks_t len,
fcb762f5	189	struct xfs_owner_info *oinfo, bool skip_discard);
d952e2f8 CH	190	void xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork);
	191	int xfs_bmap_first_unused(struct xfs_trans tp, struct xfs_inode ip,
	192	xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork);
	193	int xfs_bmap_last_before(struct xfs_trans tp, struct xfs_inode ip,
	194	xfs_fileoff_t *last_block, int whichfork);
7fb2cd4d ES	195	int xfs_bmap_last_offset(struct xfs_inode ip, xfs_fileoff_t unused,
7fb2cd4d ES	196	int whichfork);
d952e2f8	197	int xfs_bmap_one_block(struct xfs_inode *ip, int whichfork);
5c8ed202 DC	198	int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno,
	199	xfs_filblks_t len, struct xfs_bmbt_irec *mval,
	200	int *nmap, int flags);
c0dc7828 DC	201	int xfs_bmapi_write(struct xfs_trans tp, struct xfs_inode ip,
c0dc7828 DC	202	xfs_fileoff_t bno, xfs_filblks_t len, int flags,
a7beabea	203	xfs_extlen_t total, struct xfs_bmbt_irec mval, int nmap);
4453593b DW	204	int __xfs_bunmapi(struct xfs_trans tp, struct xfs_inode ip,
4453593b DW	205	xfs_fileoff_t bno, xfs_filblks_t *rlen, int flags,
2af52842	206	xfs_extnum_t nexts);
d952e2f8 CH	207	int xfs_bunmapi(struct xfs_trans tp, struct xfs_inode ip,
d952e2f8 CH	208	xfs_fileoff_t bno, xfs_filblks_t len, int flags,
2af52842	209	xfs_extnum_t nexts, int *done);
fa5c836c	210	int xfs_bmap_del_extent_delay(struct xfs_inode *ip, int whichfork,
b2b1712a CH	211	struct xfs_iext_cursor cur, struct xfs_bmbt_irec got,
	212	struct xfs_bmbt_irec *del);
	213	void xfs_bmap_del_extent_cow(struct xfs_inode *ip,
	214	struct xfs_iext_cursor cur, struct xfs_bmbt_irec got,
fa5c836c	215	struct xfs_bmbt_irec *del);
d952e2f8	216	uint xfs_default_attroffset(struct xfs_inode *ip);
ecfea3f0	217	int xfs_bmap_collapse_extents(struct xfs_trans tp, struct xfs_inode ip,
a904b1ca	218	xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
333f950c	219	bool *done);
f62cb48e DW	220	int xfs_bmap_can_insert_extents(struct xfs_inode *ip, xfs_fileoff_t off,
f62cb48e DW	221	xfs_fileoff_t shift);
ecfea3f0 CH	222	int xfs_bmap_insert_extents(struct xfs_trans tp, struct xfs_inode ip,
ecfea3f0 CH	223	xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
333f950c	224	bool *done, xfs_fileoff_t stop_fsb);
a904b1ca	225	int xfs_bmap_split_extent(struct xfs_inode *ip, xfs_fileoff_t split_offset);
be51f811	226	int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork,
974ae922	227	xfs_fileoff_t off, xfs_filblks_t len, xfs_filblks_t prealloc,
b2b1712a CH	228	struct xfs_bmbt_irec got, struct xfs_iext_cursor cur,
b2b1712a CH	229	int eof);
1a5902c5	230
fcb762f5 BF	231	static inline void
	232	xfs_bmap_add_free(
	233	struct xfs_mount *mp,
	234	struct xfs_defer_ops *dfops,
	235	xfs_fsblock_t bno,
	236	xfs_filblks_t len,
	237	struct xfs_owner_info *oinfo)
	238	{
	239	__xfs_bmap_add_free(mp, dfops, bno, len, oinfo, false);
	240	}
	241
77d61fe4 DW	242	enum xfs_bmap_intent_type {
	243	XFS_BMAP_MAP = 1,
	244	XFS_BMAP_UNMAP,
	245	};
	246
	247	struct xfs_bmap_intent {
	248	struct list_head bi_list;
	249	enum xfs_bmap_intent_type bi_type;
	250	struct xfs_inode *bi_owner;
	251	int bi_whichfork;
	252	struct xfs_bmbt_irec bi_bmap;
	253	};
	254
9f3afb57 DW	255	int xfs_bmap_finish_one(struct xfs_trans tp, struct xfs_defer_ops dfops,
	256	struct xfs_inode *ip, enum xfs_bmap_intent_type type,
	257	int whichfork, xfs_fileoff_t startoff, xfs_fsblock_t startblock,
e1a4e37c	258	xfs_filblks_t *blockcount, xfs_exntst_t state);
9f3afb57 DW	259	int xfs_bmap_map_extent(struct xfs_mount mp, struct xfs_defer_ops dfops,
	260	struct xfs_inode ip, struct xfs_bmbt_irec imap);
	261	int xfs_bmap_unmap_extent(struct xfs_mount mp, struct xfs_defer_ops dfops,
	262	struct xfs_inode ip, struct xfs_bmbt_irec imap);
	263
060ea65b CH	264	static inline int xfs_bmap_fork_to_state(int whichfork)
	265	{
	266	switch (whichfork) {
	267	case XFS_ATTR_FORK:
	268	return BMAP_ATTRFORK;
	269	case XFS_COW_FORK:
	270	return BMAP_COWFORK;
	271	default:
	272	return 0;
	273	}
	274	}
	275
30b0984d DW	276	xfs_failaddr_t xfs_bmap_validate_extent(struct xfs_inode *ip, int whichfork,
	277	struct xfs_bmbt_irec *irec);
	278
7cf199ba DW	279	int xfs_bmapi_remap(struct xfs_trans tp, struct xfs_inode ip,
7cf199ba DW	280	xfs_fileoff_t bno, xfs_filblks_t len, xfs_fsblock_t startblock,
ff3edf25	281	int flags);
7cf199ba	282
1da177e4	283	#endif /* __XFS_BMAP_H__ */