[thirdparty/xfsprogs-dev.git] / libxfs / xfs_alloc.h

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#ifndef __XFS_ALLOC_H__
#define	__XFS_ALLOC_H__

struct xfs_buf;
struct xfs_btree_cur;
struct xfs_mount;
struct xfs_perag;
struct xfs_trans;

extern struct workqueue_struct *xfs_alloc_wq;

unsigned int xfs_agfl_size(struct xfs_mount *mp);

/*
 * Freespace allocation types.  Argument to xfs_alloc_[v]extent.
 */
#define XFS_ALLOCTYPE_FIRST_AG	0x02	/* ... start at ag 0 */
#define XFS_ALLOCTYPE_THIS_AG	0x08	/* anywhere in this a.g. */
#define XFS_ALLOCTYPE_START_BNO	0x10	/* near this block else anywhere */
#define XFS_ALLOCTYPE_NEAR_BNO	0x20	/* in this a.g. and near this block */
#define XFS_ALLOCTYPE_THIS_BNO	0x40	/* at exactly this block */

/* this should become an enum again when the tracing code is fixed */
typedef unsigned int xfs_alloctype_t;

#define XFS_ALLOC_TYPES \
	{ XFS_ALLOCTYPE_FIRST_AG,	"FIRST_AG" }, \
	{ XFS_ALLOCTYPE_THIS_AG,	"THIS_AG" }, \
	{ XFS_ALLOCTYPE_START_BNO,	"START_BNO" }, \
	{ XFS_ALLOCTYPE_NEAR_BNO,	"NEAR_BNO" }, \
	{ XFS_ALLOCTYPE_THIS_BNO,	"THIS_BNO" }

/*
 * Flags for xfs_alloc_fix_freelist.
 */
#define	XFS_ALLOC_FLAG_TRYLOCK	0x00000001  /* use trylock for buffer locking */
#define	XFS_ALLOC_FLAG_FREEING	0x00000002  /* indicate caller is freeing extents*/
#define	XFS_ALLOC_FLAG_NORMAP	0x00000004  /* don't modify the rmapbt */
#define	XFS_ALLOC_FLAG_NOSHRINK	0x00000008  /* don't shrink the freelist */
#define	XFS_ALLOC_FLAG_CHECK	0x00000010  /* test only, don't modify args */

/*
 * Argument structure for xfs_alloc routines.
 * This is turned into a structure to avoid having 20 arguments passed
 * down several levels of the stack.
 */
typedef struct xfs_alloc_arg {
	struct xfs_trans *tp;		/* transaction pointer */
	struct xfs_mount *mp;		/* file system mount point */
	struct xfs_buf	*agbp;		/* buffer for a.g. freelist header */
	struct xfs_perag *pag;		/* per-ag struct for this agno */
	struct xfs_inode *ip;		/* for userdata zeroing method */
	xfs_fsblock_t	fsbno;		/* file system block number */
	xfs_agnumber_t	agno;		/* allocation group number */
	xfs_agblock_t	agbno;		/* allocation group-relative block # */
	xfs_extlen_t	minlen;		/* minimum size of extent */
	xfs_extlen_t	maxlen;		/* maximum size of extent */
	xfs_extlen_t	mod;		/* mod value for extent size */
	xfs_extlen_t	prod;		/* prod value for extent size */
	xfs_extlen_t	minleft;	/* min blocks must be left after us */
	xfs_extlen_t	total;		/* total blocks needed in xaction */
	xfs_extlen_t	alignment;	/* align answer to multiple of this */
	xfs_extlen_t	minalignslop;	/* slop for minlen+alignment calcs */
	xfs_agblock_t	min_agbno;	/* set an agbno range for NEAR allocs */
	xfs_agblock_t	max_agbno;	/* ... */
	xfs_extlen_t	len;		/* output: actual size of extent */
	xfs_alloctype_t	type;		/* allocation type XFS_ALLOCTYPE_... */
	xfs_alloctype_t	otype;		/* original allocation type */
	int		datatype;	/* mask defining data type treatment */
	char		wasdel;		/* set if allocation was prev delayed */
	char		wasfromfl;	/* set if allocation is from freelist */
	struct xfs_owner_info	oinfo;	/* owner of blocks being allocated */
	enum xfs_ag_resv_type	resv;	/* block reservation to use */
} xfs_alloc_arg_t;

/*
 * Defines for datatype
 */
#define XFS_ALLOC_USERDATA		(1 << 0)/* allocation is for user data*/
#define XFS_ALLOC_INITIAL_USER_DATA	(1 << 1)/* special case start of file */
#define XFS_ALLOC_USERDATA_ZERO		(1 << 2)/* zero extent on allocation */
#define XFS_ALLOC_NOBUSY		(1 << 3)/* Busy extents not allowed */

static inline bool
xfs_alloc_is_userdata(int datatype)
{
	return (datatype & ~XFS_ALLOC_NOBUSY) != 0;
}

static inline bool
xfs_alloc_allow_busy_reuse(int datatype)
{
	return (datatype & XFS_ALLOC_NOBUSY) == 0;
}

/* freespace limit calculations */
#define XFS_ALLOC_AGFL_RESERVE	4
unsigned int xfs_alloc_set_aside(struct xfs_mount *mp);
unsigned int xfs_alloc_ag_max_usable(struct xfs_mount *mp);

xfs_extlen_t xfs_alloc_longest_free_extent(struct xfs_perag *pag,
		xfs_extlen_t need, xfs_extlen_t reserved);
unsigned int xfs_alloc_min_freelist(struct xfs_mount *mp,
		struct xfs_perag *pag);

/*
 * Compute and fill in value of m_ag_maxlevels.
 */
void
xfs_alloc_compute_maxlevels(
	struct xfs_mount	*mp);	/* file system mount structure */

/*
 * Get a block from the freelist.
 * Returns with the buffer for the block gotten.
 */
int				/* error */
xfs_alloc_get_freelist(
	struct xfs_trans *tp,	/* transaction pointer */
	struct xfs_buf	*agbp,	/* buffer containing the agf structure */
	xfs_agblock_t	*bnop,	/* block address retrieved from freelist */
	int		btreeblk); /* destination is a AGF btree */

/*
 * Log the given fields from the agf structure.
 */
void
xfs_alloc_log_agf(
	struct xfs_trans *tp,	/* transaction pointer */
	struct xfs_buf	*bp,	/* buffer for a.g. freelist header */
	int		fields);/* mask of fields to be logged (XFS_AGF_...) */

/*
 * Interface for inode allocation to force the pag data to be initialized.
 */
int				/* error */
xfs_alloc_pagf_init(
	struct xfs_mount *mp,	/* file system mount structure */
	struct xfs_trans *tp,	/* transaction pointer */
	xfs_agnumber_t	agno,	/* allocation group number */
	int		flags);	/* XFS_ALLOC_FLAGS_... */

/*
 * Put the block on the freelist for the allocation group.
 */
int				/* error */
xfs_alloc_put_freelist(
	struct xfs_trans *tp,	/* transaction pointer */
	struct xfs_buf	*agbp,	/* buffer for a.g. freelist header */
	struct xfs_buf	*agflbp,/* buffer for a.g. free block array */
	xfs_agblock_t	bno,	/* block being freed */
	int		btreeblk); /* owner was a AGF btree */

/*
 * Read in the allocation group header (free/alloc section).
 */
int					/* error  */
xfs_alloc_read_agf(
	struct xfs_mount *mp,		/* mount point structure */
	struct xfs_trans *tp,		/* transaction pointer */
	xfs_agnumber_t	agno,		/* allocation group number */
	int		flags,		/* XFS_ALLOC_FLAG_... */
	struct xfs_buf	**bpp);		/* buffer for the ag freelist header */

/*
 * Allocate an extent (variable-size).
 */
int				/* error */
xfs_alloc_vextent(
	xfs_alloc_arg_t	*args);	/* allocation argument structure */

/*
 * Free an extent.
 */
int				/* error */
__xfs_free_extent(
	struct xfs_trans	*tp,	/* transaction pointer */
	xfs_fsblock_t		bno,	/* starting block number of extent */
	xfs_extlen_t		len,	/* length of extent */
	const struct xfs_owner_info	*oinfo,	/* extent owner */
	enum xfs_ag_resv_type	type,	/* block reservation type */
	bool			skip_discard);

static inline int
xfs_free_extent(
	struct xfs_trans	*tp,
	xfs_fsblock_t		bno,
	xfs_extlen_t		len,
	const struct xfs_owner_info	*oinfo,
	enum xfs_ag_resv_type	type)
{
	return __xfs_free_extent(tp, bno, len, oinfo, type, false);
}

int				/* error */
xfs_alloc_lookup_le(
	struct xfs_btree_cur	*cur,	/* btree cursor */
	xfs_agblock_t		bno,	/* starting block of extent */
	xfs_extlen_t		len,	/* length of extent */
	int			*stat);	/* success/failure */

int				/* error */
xfs_alloc_lookup_ge(
	struct xfs_btree_cur	*cur,	/* btree cursor */
	xfs_agblock_t		bno,	/* starting block of extent */
	xfs_extlen_t		len,	/* length of extent */
	int			*stat);	/* success/failure */

int					/* error */
xfs_alloc_get_rec(
	struct xfs_btree_cur	*cur,	/* btree cursor */
	xfs_agblock_t		*bno,	/* output: starting block of extent */
	xfs_extlen_t		*len,	/* output: length of extent */
	int			*stat);	/* output: success/failure */

int xfs_read_agf(struct xfs_mount *mp, struct xfs_trans *tp,
			xfs_agnumber_t agno, int flags, struct xfs_buf **bpp);
int xfs_alloc_read_agfl(struct xfs_mount *mp, struct xfs_trans *tp,
			xfs_agnumber_t agno, struct xfs_buf **bpp);
int xfs_free_agfl_block(struct xfs_trans *, xfs_agnumber_t, xfs_agblock_t,
			struct xfs_buf *, struct xfs_owner_info *);
int xfs_alloc_fix_freelist(struct xfs_alloc_arg *args, int flags);
int xfs_free_extent_fix_freelist(struct xfs_trans *tp, xfs_agnumber_t agno,
		struct xfs_buf **agbp);

xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp);

typedef int (*xfs_alloc_query_range_fn)(
	struct xfs_btree_cur		*cur,
	struct xfs_alloc_rec_incore	*rec,
	void				*priv);

int xfs_alloc_query_range(struct xfs_btree_cur *cur,
		struct xfs_alloc_rec_incore *low_rec,
		struct xfs_alloc_rec_incore *high_rec,
		xfs_alloc_query_range_fn fn, void *priv);
int xfs_alloc_query_all(struct xfs_btree_cur *cur, xfs_alloc_query_range_fn fn,
		void *priv);

int xfs_alloc_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno,
		xfs_extlen_t len, bool *exist);

typedef int (*xfs_agfl_walk_fn)(struct xfs_mount *mp, xfs_agblock_t bno,
		void *priv);
int xfs_agfl_walk(struct xfs_mount *mp, struct xfs_agf *agf,
		struct xfs_buf *agflbp, xfs_agfl_walk_fn walk_fn, void *priv);

#endif	/* __XFS_ALLOC_H__ */
Commit	Line	Data
37b3b4d6	1	// SPDX-License-Identifier: GPL-2.0
2bd0ea18	2	/*
f302e9e4 NS	3	* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
f302e9e4 NS	4	* All Rights Reserved.
2bd0ea18 NS	5	*/
2bd0ea18 NS	6	#ifndef __XFS_ALLOC_H__
dfc130f3	7	#define __XFS_ALLOC_H__
2bd0ea18 NS	8
2bd0ea18 NS	9	struct xfs_buf;
a2ceac1f	10	struct xfs_btree_cur;
2bd0ea18 NS	11	struct xfs_mount;
	12	struct xfs_perag;
	13	struct xfs_trans;
a2ceac1f DC	14
a2ceac1f DC	15	extern struct workqueue_struct *xfs_alloc_wq;
2bd0ea18	16
b8165508 DC	17	unsigned int xfs_agfl_size(struct xfs_mount *mp);
b8165508 DC	18
2bd0ea18	19	/*
dfc130f3	20	* Freespace allocation types. Argument to xfs_alloc_[v]extent.
2bd0ea18	21	*/
56b2de80	22	#define XFS_ALLOCTYPE_FIRST_AG 0x02 /* ... start at ag 0 */
56b2de80 DC	23	#define XFS_ALLOCTYPE_THIS_AG 0x08 /* anywhere in this a.g. */
	24	#define XFS_ALLOCTYPE_START_BNO 0x10 /* near this block else anywhere */
	25	#define XFS_ALLOCTYPE_NEAR_BNO 0x20 /* in this a.g. and near this block */
	26	#define XFS_ALLOCTYPE_THIS_BNO 0x40 /* at exactly this block */
	27
	28	/* this should become an enum again when the tracing code is fixed */
	29	typedef unsigned int xfs_alloctype_t;
	30
	31	#define XFS_ALLOC_TYPES \
56b2de80	32	{ XFS_ALLOCTYPE_FIRST_AG, "FIRST_AG" }, \
56b2de80 DC	33	{ XFS_ALLOCTYPE_THIS_AG, "THIS_AG" }, \
	34	{ XFS_ALLOCTYPE_START_BNO, "START_BNO" }, \
	35	{ XFS_ALLOCTYPE_NEAR_BNO, "NEAR_BNO" }, \
	36	{ XFS_ALLOCTYPE_THIS_BNO, "THIS_BNO" }
2bd0ea18 NS	37
	38	/*
	39	* Flags for xfs_alloc_fix_freelist.
	40	*/
dfc130f3	41	#define XFS_ALLOC_FLAG_TRYLOCK 0x00000001 /* use trylock for buffer locking */
5e656dbb	42	#define XFS_ALLOC_FLAG_FREEING 0x00000002 /* indicate caller is freeing extents*/
e365af6f DW	43	#define XFS_ALLOC_FLAG_NORMAP 0x00000004 /* don't modify the rmapbt */
e365af6f DW	44	#define XFS_ALLOC_FLAG_NOSHRINK 0x00000008 /* don't shrink the freelist */
2c003dc2	45	#define XFS_ALLOC_FLAG_CHECK 0x00000010 /* test only, don't modify args */
5e656dbb	46
2bd0ea18 NS	47	/*
	48	* Argument structure for xfs_alloc routines.
	49	* This is turned into a structure to avoid having 20 arguments passed
	50	* down several levels of the stack.
	51	*/
	52	typedef struct xfs_alloc_arg {
	53	struct xfs_trans tp; / transaction pointer */
	54	struct xfs_mount mp; / file system mount point */
	55	struct xfs_buf agbp; / buffer for a.g. freelist header */
	56	struct xfs_perag pag; / per-ag struct for this agno */
9542ae13	57	struct xfs_inode ip; / for userdata zeroing method */
2bd0ea18 NS	58	xfs_fsblock_t fsbno; /* file system block number */
	59	xfs_agnumber_t agno; /* allocation group number */
	60	xfs_agblock_t agbno; /* allocation group-relative block # */
	61	xfs_extlen_t minlen; /* minimum size of extent */
	62	xfs_extlen_t maxlen; /* maximum size of extent */
	63	xfs_extlen_t mod; /* mod value for extent size */
	64	xfs_extlen_t prod; /* prod value for extent size */
	65	xfs_extlen_t minleft; /* min blocks must be left after us */
	66	xfs_extlen_t total; /* total blocks needed in xaction */
	67	xfs_extlen_t alignment; /* align answer to multiple of this */
	68	xfs_extlen_t minalignslop; /* slop for minlen+alignment calcs */
ff3263dd BF	69	xfs_agblock_t min_agbno; /* set an agbno range for NEAR allocs */
ff3263dd BF	70	xfs_agblock_t max_agbno; /* ... */
2bd0ea18	71	xfs_extlen_t len; /* output: actual size of extent */
dfc130f3 RC	72	xfs_alloctype_t type; /* allocation type XFS_ALLOCTYPE_... */
dfc130f3 RC	73	xfs_alloctype_t otype; /* original allocation type */
1fccd5c8	74	int datatype; /* mask defining data type treatment */
2bd0ea18 NS	75	char wasdel; /* set if allocation was prev delayed */
2bd0ea18 NS	76	char wasfromfl; /* set if allocation is from freelist */
85aec44f	77	struct xfs_owner_info oinfo; /* owner of blocks being allocated */
cf8ce220	78	enum xfs_ag_resv_type resv; /* block reservation to use */
2bd0ea18 NS	79	} xfs_alloc_arg_t;
2bd0ea18 NS	80
34317449	81	/*
1fccd5c8	82	* Defines for datatype
34317449	83	*/
9542ae13 DC	84	#define XFS_ALLOC_USERDATA (1 << 0)/* allocation is for user data*/
	85	#define XFS_ALLOC_INITIAL_USER_DATA (1 << 1)/* special case start of file */
	86	#define XFS_ALLOC_USERDATA_ZERO (1 << 2)/* zero extent on allocation */
1fccd5c8 DC	87	#define XFS_ALLOC_NOBUSY (1 << 3)/* Busy extents not allowed */
	88
	89	static inline bool
	90	xfs_alloc_is_userdata(int datatype)
	91	{
	92	return (datatype & ~XFS_ALLOC_NOBUSY) != 0;
	93	}
	94
	95	static inline bool
	96	xfs_alloc_allow_busy_reuse(int datatype)
	97	{
	98	return (datatype & XFS_ALLOC_NOBUSY) == 0;
	99	}
34317449	100
b8a8d6e5 DW	101	/* freespace limit calculations */
	102	#define XFS_ALLOC_AGFL_RESERVE 4
	103	unsigned int xfs_alloc_set_aside(struct xfs_mount *mp);
	104	unsigned int xfs_alloc_ag_max_usable(struct xfs_mount *mp);
	105
1421de38 ES	106	xfs_extlen_t xfs_alloc_longest_free_extent(struct xfs_perag *pag,
1421de38 ES	107	xfs_extlen_t need, xfs_extlen_t reserved);
de046644 DC	108	unsigned int xfs_alloc_min_freelist(struct xfs_mount *mp,
de046644 DC	109	struct xfs_perag *pag);
23aab3f9	110
2bd0ea18 NS	111	/*
	112	* Compute and fill in value of m_ag_maxlevels.
	113	*/
	114	void
	115	xfs_alloc_compute_maxlevels(
	116	struct xfs_mount mp); / file system mount structure */
	117
2bd0ea18 NS	118	/*
	119	* Get a block from the freelist.
	120	* Returns with the buffer for the block gotten.
	121	*/
	122	int /* error */
	123	xfs_alloc_get_freelist(
	124	struct xfs_trans tp, / transaction pointer */
	125	struct xfs_buf agbp, / buffer containing the agf structure */
cdded3d8 DC	126	xfs_agblock_t bnop, / block address retrieved from freelist */
cdded3d8 DC	127	int btreeblk); /* destination is a AGF btree */
2bd0ea18 NS	128
	129	/*
	130	* Log the given fields from the agf structure.
	131	*/
	132	void
	133	xfs_alloc_log_agf(
	134	struct xfs_trans tp, / transaction pointer */
	135	struct xfs_buf bp, / buffer for a.g. freelist header */
	136	int fields);/* mask of fields to be logged (XFS_AGF_...) */
	137
	138	/*
	139	* Interface for inode allocation to force the pag data to be initialized.
	140	*/
	141	int /* error */
	142	xfs_alloc_pagf_init(
	143	struct xfs_mount mp, / file system mount structure */
	144	struct xfs_trans tp, / transaction pointer */
	145	xfs_agnumber_t agno, /* allocation group number */
dfc130f3	146	int flags); /* XFS_ALLOC_FLAGS_... */
2bd0ea18 NS	147
	148	/*
	149	* Put the block on the freelist for the allocation group.
	150	*/
	151	int /* error */
	152	xfs_alloc_put_freelist(
	153	struct xfs_trans tp, / transaction pointer */
	154	struct xfs_buf agbp, / buffer for a.g. freelist header */
	155	struct xfs_buf agflbp,/ buffer for a.g. free block array */
cdded3d8 DC	156	xfs_agblock_t bno, /* block being freed */
cdded3d8 DC	157	int btreeblk); /* owner was a AGF btree */
2bd0ea18 NS	158
	159	/*
	160	* Read in the allocation group header (free/alloc section).
	161	*/
	162	int /* error */
	163	xfs_alloc_read_agf(
	164	struct xfs_mount mp, / mount point structure */
	165	struct xfs_trans tp, / transaction pointer */
	166	xfs_agnumber_t agno, /* allocation group number */
	167	int flags, /* XFS_ALLOC_FLAG_... */
	168	struct xfs_buf *bpp); / buffer for the ag freelist header */
	169
	170	/*
	171	* Allocate an extent (variable-size).
	172	*/
	173	int /* error */
	174	xfs_alloc_vextent(
dfc130f3	175	xfs_alloc_arg_t args); / allocation argument structure */
2bd0ea18 NS	176
	177	/*
	178	* Free an extent.
	179	*/
	180	int /* error */
3a13f959	181	__xfs_free_extent(
85aec44f DW	182	struct xfs_trans tp, / transaction pointer */
	183	xfs_fsblock_t bno, /* starting block number of extent */
	184	xfs_extlen_t len, /* length of extent */
5837e73b	185	const struct xfs_owner_info oinfo, / extent owner */
3a13f959 BF	186	enum xfs_ag_resv_type type, /* block reservation type */
	187	bool skip_discard);
	188
	189	static inline int
	190	xfs_free_extent(
	191	struct xfs_trans *tp,
	192	xfs_fsblock_t bno,
	193	xfs_extlen_t len,
5837e73b	194	const struct xfs_owner_info *oinfo,
3a13f959 BF	195	enum xfs_ag_resv_type type)
	196	{
	197	return __xfs_free_extent(tp, bno, len, oinfo, type, false);
	198	}
	199
1fe41a73 DW	200	int /* error */
	201	xfs_alloc_lookup_le(
	202	struct xfs_btree_cur cur, / btree cursor */
	203	xfs_agblock_t bno, /* starting block of extent */
	204	xfs_extlen_t len, /* length of extent */
	205	int stat); / success/failure */
	206
a2ceac1f DC	207	int /* error */
	208	xfs_alloc_lookup_ge(
	209	struct xfs_btree_cur cur, / btree cursor */
	210	xfs_agblock_t bno, /* starting block of extent */
	211	xfs_extlen_t len, /* length of extent */
	212	int stat); / success/failure */
	213
	214	int /* error */
	215	xfs_alloc_get_rec(
	216	struct xfs_btree_cur cur, / btree cursor */
	217	xfs_agblock_t bno, / output: starting block of extent */
	218	xfs_extlen_t len, / output: length of extent */
	219	int stat); / output: success/failure */
	220
5a35bf2c DC	221	int xfs_read_agf(struct xfs_mount mp, struct xfs_trans tp,
5a35bf2c DC	222	xfs_agnumber_t agno, int flags, struct xfs_buf **bpp);
50bb67d6 DW	223	int xfs_alloc_read_agfl(struct xfs_mount mp, struct xfs_trans tp,
50bb67d6 DW	224	xfs_agnumber_t agno, struct xfs_buf **bpp);
30c8be8a BF	225	int xfs_free_agfl_block(struct xfs_trans *, xfs_agnumber_t, xfs_agblock_t,
30c8be8a BF	226	struct xfs_buf , struct xfs_owner_info );
e515cca1	227	int xfs_alloc_fix_freelist(struct xfs_alloc_arg *args, int flags);
2a6da3b8 DC	228	int xfs_free_extent_fix_freelist(struct xfs_trans *tp, xfs_agnumber_t agno,
2a6da3b8 DC	229	struct xfs_buf **agbp);
5a35bf2c	230
ef5340cd DW	231	xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp);
ef5340cd DW	232
b3d83fa6 DW	233	typedef int (*xfs_alloc_query_range_fn)(
	234	struct xfs_btree_cur *cur,
	235	struct xfs_alloc_rec_incore *rec,
	236	void *priv);
	237
	238	int xfs_alloc_query_range(struct xfs_btree_cur *cur,
	239	struct xfs_alloc_rec_incore *low_rec,
	240	struct xfs_alloc_rec_incore *high_rec,
	241	xfs_alloc_query_range_fn fn, void *priv);
7e05e856 DW	242	int xfs_alloc_query_all(struct xfs_btree_cur *cur, xfs_alloc_query_range_fn fn,
7e05e856 DW	243	void *priv);
b3d83fa6	244
1fe41a73 DW	245	int xfs_alloc_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno,
	246	xfs_extlen_t len, bool *exist);
	247
71a98c66 DW	248	typedef int (xfs_agfl_walk_fn)(struct xfs_mount mp, xfs_agblock_t bno,
	249	void *priv);
	250	int xfs_agfl_walk(struct xfs_mount mp, struct xfs_agf agf,
	251	struct xfs_buf agflbp, xfs_agfl_walk_fn walk_fn, void priv);
	252
2bd0ea18	253	#endif /* __XFS_ALLOC_H__ */