[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 */
	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_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

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

#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" }, \
	{ XFS_BMAPI_NODISCARD,	"NODISCARD" }


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_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_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);

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);
}

static inline void
xfs_bmap_add_free_nodiscard(
	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, true);
}

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);

#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 */
3a13f959	71	bool xefi_skip_discard;
2cf6d225	72	};
2bd0ea18	73
dfc130f3	74	#define XFS_BMAP_MAX_NMAP 4
2bd0ea18 NS	75
2bd0ea18 NS	76	/*
a2ceac1f	77	* Flags for xfs_bmapi_*
2bd0ea18	78	*/
a2ceac1f DC	79	#define XFS_BMAPI_ENTIRE 0x001 /* return entire extent, not trimmed */
	80	#define XFS_BMAPI_METADATA 0x002 /* mapping metadata not user data */
	81	#define XFS_BMAPI_ATTRFORK 0x004 /* use attribute fork not data */
	82	#define XFS_BMAPI_PREALLOC 0x008 /* preallocation op: unwritten space */
	83	#define XFS_BMAPI_IGSTATE 0x010 /* Ignore state - */
2bd0ea18	84	/* combine contig. space */
a2ceac1f	85	#define XFS_BMAPI_CONTIG 0x020 /* must allocate only one extent */
56b2de80 DC	86	/*
	87	* unwritten extent conversion - this needs write cache flushing and no additional
	88	* allocation alignments. When specified with XFS_BMAPI_PREALLOC it converts
	89	* from written to unwritten, otherwise convert from unwritten to written.
	90	*/
a2ceac1f	91	#define XFS_BMAPI_CONVERT 0x040
56b2de80	92
9542ae13 DC	93	/*
	94	* allocate zeroed extents - this requires all newly allocated user data extents
	95	* to be initialised to zero. It will be ignored if XFS_BMAPI_METADATA is set.
	96	* Use in conjunction with XFS_BMAPI_CONVERT to convert unwritten extents found
	97	* during the allocation range to zeroed written extents.
	98	*/
	99	#define XFS_BMAPI_ZERO 0x080
	100
34621a47 DW	101	/*
	102	* Map the inode offset to the block given in ap->firstblock. Primarily
	103	* used for reflink. The range must be in a hole, and this flag cannot be
	104	* turned on with PREALLOC or CONVERT, and cannot be used on the attr fork.
36b16da8 DW	105	*
	106	* For bunmapi, this flag unmaps the range without adjusting quota, reducing
	107	* refcount, or freeing the blocks.
34621a47 DW	108	*/
	109	#define XFS_BMAPI_REMAP 0x100
	110
cb8a004a DW	111	/* Map something in the CoW fork. */
	112	#define XFS_BMAPI_COWFORK 0x200
	113
7075a23f CH	114	/* Only convert delalloc space, don't allocate entirely new extents */
	115	#define XFS_BMAPI_DELALLOC 0x400
	116
8e87c884 CH	117	/* Only convert unwritten extents, don't allocate new blocks */
	118	#define XFS_BMAPI_CONVERT_ONLY 0x800
	119
3a13f959 BF	120	/* Skip online discard of freed extents */
	121	#define XFS_BMAPI_NODISCARD 0x1000
	122
56b2de80	123	#define XFS_BMAPI_FLAGS \
56b2de80 DC	124	{ XFS_BMAPI_ENTIRE, "ENTIRE" }, \
	125	{ XFS_BMAPI_METADATA, "METADATA" }, \
	126	{ XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \
56b2de80 DC	127	{ XFS_BMAPI_PREALLOC, "PREALLOC" }, \
	128	{ XFS_BMAPI_IGSTATE, "IGSTATE" }, \
	129	{ XFS_BMAPI_CONTIG, "CONTIG" }, \
9542ae13	130	{ XFS_BMAPI_CONVERT, "CONVERT" }, \
34621a47	131	{ XFS_BMAPI_ZERO, "ZERO" }, \
cb8a004a	132	{ XFS_BMAPI_REMAP, "REMAP" }, \
7075a23f	133	{ XFS_BMAPI_COWFORK, "COWFORK" }, \
8e87c884	134	{ XFS_BMAPI_DELALLOC, "DELALLOC" }, \
3a13f959 BF	135	{ XFS_BMAPI_CONVERT_ONLY, "CONVERT_ONLY" }, \
3a13f959 BF	136	{ XFS_BMAPI_NODISCARD, "NODISCARD" }
56b2de80	137
2bd0ea18	138
f302e9e4 NS	139	static inline int xfs_bmapi_aflag(int w)
f302e9e4 NS	140	{
cb8a004a DW	141	return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK :
	142	(w == XFS_COW_FORK ? XFS_BMAPI_COWFORK : 0));
	143	}
	144
	145	static inline int xfs_bmapi_whichfork(int bmapi_flags)
	146	{
	147	if (bmapi_flags & XFS_BMAPI_COWFORK)
	148	return XFS_COW_FORK;
	149	else if (bmapi_flags & XFS_BMAPI_ATTRFORK)
	150	return XFS_ATTR_FORK;
	151	return XFS_DATA_FORK;
f302e9e4	152	}
2bd0ea18 NS	153
	154	/*
	155	* Special values for xfs_bmbt_irec_t br_startblock field.
	156	*/
dfc130f3 RC	157	#define DELAYSTARTBLOCK ((xfs_fsblock_t)-1LL)
dfc130f3 RC	158	#define HOLESTARTBLOCK ((xfs_fsblock_t)-2LL)
2bd0ea18	159
23aab3f9	160	/*
56b2de80	161	* Flags for xfs_bmap_add_extent*.
23aab3f9	162	*/
56b2de80 DC	163	#define BMAP_LEFT_CONTIG (1 << 0)
	164	#define BMAP_RIGHT_CONTIG (1 << 1)
	165	#define BMAP_LEFT_FILLING (1 << 2)
	166	#define BMAP_RIGHT_FILLING (1 << 3)
	167	#define BMAP_LEFT_DELAY (1 << 4)
	168	#define BMAP_RIGHT_DELAY (1 << 5)
	169	#define BMAP_LEFT_VALID (1 << 6)
	170	#define BMAP_RIGHT_VALID (1 << 7)
	171	#define BMAP_ATTRFORK (1 << 8)
cb8a004a	172	#define BMAP_COWFORK (1 << 9)
56b2de80 DC	173
	174	#define XFS_BMAP_EXT_FLAGS \
	175	{ BMAP_LEFT_CONTIG, "LC" }, \
	176	{ BMAP_RIGHT_CONTIG, "RC" }, \
	177	{ BMAP_LEFT_FILLING, "LF" }, \
	178	{ BMAP_RIGHT_FILLING, "RF" }, \
cb8a004a DW	179	{ BMAP_ATTRFORK, "ATTR" }, \
cb8a004a DW	180	{ BMAP_COWFORK, "COW" }
23aab3f9	181
ff105f75	182
cd83dc79 CH	183	/*
	184	* Return true if the extent is a real, allocated extent, or false if it is a
	185	* delayed allocation, and unwritten extent or a hole.
	186	*/
	187	static inline bool xfs_bmap_is_real_extent(struct xfs_bmbt_irec *irec)
	188	{
	189	return irec->br_state != XFS_EXT_UNWRITTEN &&
	190	irec->br_startblock != HOLESTARTBLOCK &&
	191	irec->br_startblock != DELAYSTARTBLOCK &&
	192	!isnullstartblock(irec->br_startblock);
	193	}
	194
b3fd8db7 DW	195	void xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno,
b3fd8db7 DW	196	xfs_filblks_t len);
ca75eb20	197	void xfs_trim_extent_eof(struct xfs_bmbt_irec , struct xfs_inode );
a2ceac1f	198	int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
3f17ed4b	199	void xfs_bmap_local_to_extents_empty(struct xfs_inode *ip, int whichfork);
3a13f959	200	void __xfs_bmap_add_free(struct xfs_mount mp, struct xfs_defer_ops dfops,
85aec44f	201	xfs_fsblock_t bno, xfs_filblks_t len,
3a13f959	202	struct xfs_owner_info *oinfo, bool skip_discard);
a2ceac1f DC	203	void xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork);
	204	int xfs_bmap_first_unused(struct xfs_trans tp, struct xfs_inode ip,
	205	xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork);
	206	int xfs_bmap_last_before(struct xfs_trans tp, struct xfs_inode ip,
	207	xfs_fileoff_t *last_block, int whichfork);
ff105f75 DC	208	int xfs_bmap_last_offset(struct xfs_inode ip, xfs_fileoff_t unused,
ff105f75 DC	209	int whichfork);
a2ceac1f	210	int xfs_bmap_one_block(struct xfs_inode *ip, int whichfork);
a2ceac1f DC	211	int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno,
	212	xfs_filblks_t len, struct xfs_bmbt_irec *mval,
	213	int *nmap, int flags);
a2ceac1f DC	214	int xfs_bmapi_write(struct xfs_trans tp, struct xfs_inode ip,
	215	xfs_fileoff_t bno, xfs_filblks_t len, int flags,
	216	xfs_fsblock_t *firstblock, xfs_extlen_t total,
	217	struct xfs_bmbt_irec mval, int nmap,
f33cea1a	218	struct xfs_defer_ops *dfops);
3d36acda DW	219	int __xfs_bunmapi(struct xfs_trans tp, struct xfs_inode ip,
	220	xfs_fileoff_t bno, xfs_filblks_t *rlen, int flags,
	221	xfs_extnum_t nexts, xfs_fsblock_t *firstblock,
	222	struct xfs_defer_ops *dfops);
a2ceac1f DC	223	int xfs_bunmapi(struct xfs_trans tp, struct xfs_inode ip,
	224	xfs_fileoff_t bno, xfs_filblks_t len, int flags,
	225	xfs_extnum_t nexts, xfs_fsblock_t *firstblock,
f33cea1a	226	struct xfs_defer_ops dfops, int done);
ece930fa	227	int xfs_bmap_del_extent_delay(struct xfs_inode *ip, int whichfork,
9788e059 CH	228	struct xfs_iext_cursor cur, struct xfs_bmbt_irec got,
	229	struct xfs_bmbt_irec *del);
	230	void xfs_bmap_del_extent_cow(struct xfs_inode *ip,
	231	struct xfs_iext_cursor cur, struct xfs_bmbt_irec got,
ece930fa	232	struct xfs_bmbt_irec *del);
a2ceac1f	233	uint xfs_default_attroffset(struct xfs_inode *ip);
a9f5d25e	234	int xfs_bmap_collapse_extents(struct xfs_trans tp, struct xfs_inode ip,
19ebedcf	235	xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
1421de38	236	bool done, xfs_fsblock_t firstblock,
a9f5d25e CH	237	struct xfs_defer_ops *dfops);
	238	int xfs_bmap_insert_extents(struct xfs_trans tp, struct xfs_inode ip,
	239	xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
	240	bool done, xfs_fileoff_t stop_fsb, xfs_fsblock_t firstblock,
	241	struct xfs_defer_ops *dfops);
19ebedcf	242	int xfs_bmap_split_extent(struct xfs_inode *ip, xfs_fileoff_t split_offset);
cc66acaf	243	int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork,
f7b1a8b1	244	xfs_fileoff_t off, xfs_filblks_t len, xfs_filblks_t prealloc,
9788e059 CH	245	struct xfs_bmbt_irec got, struct xfs_iext_cursor cur,
9788e059 CH	246	int eof);
56b2de80	247
3a13f959 BF	248	static inline void
	249	xfs_bmap_add_free(
	250	struct xfs_mount *mp,
	251	struct xfs_defer_ops *dfops,
	252	xfs_fsblock_t bno,
	253	xfs_filblks_t len,
	254	struct xfs_owner_info *oinfo)
	255	{
	256	__xfs_bmap_add_free(mp, dfops, bno, len, oinfo, false);
	257	}
	258
	259	static inline void
	260	xfs_bmap_add_free_nodiscard(
	261	struct xfs_mount *mp,
	262	struct xfs_defer_ops *dfops,
	263	xfs_fsblock_t bno,
	264	xfs_filblks_t len,
	265	struct xfs_owner_info *oinfo)
	266	{
	267	__xfs_bmap_add_free(mp, dfops, bno, len, oinfo, true);
	268	}
	269
34f8f3e1 DW	270	enum xfs_bmap_intent_type {
	271	XFS_BMAP_MAP = 1,
	272	XFS_BMAP_UNMAP,
	273	};
	274
	275	struct xfs_bmap_intent {
	276	struct list_head bi_list;
	277	enum xfs_bmap_intent_type bi_type;
	278	struct xfs_inode *bi_owner;
	279	int bi_whichfork;
	280	struct xfs_bmbt_irec bi_bmap;
	281	};
	282
aeb88300 DW	283	int xfs_bmap_finish_one(struct xfs_trans tp, struct xfs_defer_ops dfops,
	284	struct xfs_inode *ip, enum xfs_bmap_intent_type type,
	285	int whichfork, xfs_fileoff_t startoff, xfs_fsblock_t startblock,
594956fa	286	xfs_filblks_t *blockcount, xfs_exntst_t state);
aeb88300 DW	287	int xfs_bmap_map_extent(struct xfs_mount mp, struct xfs_defer_ops dfops,
	288	struct xfs_inode ip, struct xfs_bmbt_irec imap);
	289	int xfs_bmap_unmap_extent(struct xfs_mount mp, struct xfs_defer_ops dfops,
	290	struct xfs_inode ip, struct xfs_bmbt_irec imap);
	291
7bd43334 CH	292	static inline int xfs_bmap_fork_to_state(int whichfork)
	293	{
	294	switch (whichfork) {
	295	case XFS_ATTR_FORK:
	296	return BMAP_ATTRFORK;
	297	case XFS_COW_FORK:
	298	return BMAP_COWFORK;
	299	default:
	300	return 0;
	301	}
	302	}
	303
0cf6a3a9 DW	304	xfs_failaddr_t xfs_bmap_validate_extent(struct xfs_inode *ip, int whichfork,
	305	struct xfs_bmbt_irec *irec);
	306
2bd0ea18	307	#endif /* __XFS_BMAP_H__ */