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

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
 * Copyright (c) 2013 Red Hat, Inc.
 * All Rights Reserved.
 */
#ifndef __XFS_DA_BTREE_H__
#define	__XFS_DA_BTREE_H__

struct xfs_inode;
struct xfs_trans;

/*
 * Directory/attribute geometry information. There will be one of these for each
 * data fork type, and it will be passed around via the xfs_da_args. Global
 * structures will be attached to the xfs_mount.
 */
struct xfs_da_geometry {
	unsigned int	blksize;	/* da block size in bytes */
	unsigned int	fsbcount;	/* da block size in filesystem blocks */
	uint8_t		fsblog;		/* log2 of _filesystem_ block size */
	uint8_t		blklog;		/* log2 of da block size */
	unsigned int	node_hdr_size;	/* danode header size in bytes */
	unsigned int	node_ents;	/* # of entries in a danode */
	unsigned int	magicpct;	/* 37% of block size in bytes */
	xfs_dablk_t	datablk;	/* blockno of dir data v2 */
	unsigned int	leaf_hdr_size;	/* dir2 leaf header size */
	unsigned int	leaf_max_ents;	/* # of entries in dir2 leaf */
	xfs_dablk_t	leafblk;	/* blockno of leaf data v2 */
	unsigned int	free_hdr_size;	/* dir2 free header size */
	unsigned int	free_max_bests;	/* # of bests entries in dir2 free */
	xfs_dablk_t	freeblk;	/* blockno of free data v2 */
	xfs_extnum_t	max_extents;	/* Max. extents in corresponding fork */

	xfs_dir2_data_aoff_t data_first_offset;
	size_t		data_entry_offset;
};

/*========================================================================
 * Btree searching and modification structure definitions.
 *========================================================================*/

/*
 * Search comparison results
 */
enum xfs_dacmp {
	XFS_CMP_DIFFERENT,	/* names are completely different */
	XFS_CMP_EXACT,		/* names are exactly the same */
	XFS_CMP_CASE		/* names are same but differ in case */
};

/*
 * Structure to ease passing around component names.
 */
typedef struct xfs_da_args {
	struct xfs_da_geometry *geo;	/* da block geometry */
	const uint8_t		*name;		/* string (maybe not NULL terminated) */
	int		namelen;	/* length of string (maybe no NULL) */
	uint8_t		filetype;	/* filetype of inode for directories */
	void		*value;		/* set of bytes (maybe contain NULLs) */
	int		valuelen;	/* length of value */
	unsigned int	attr_filter;	/* XFS_ATTR_{ROOT,SECURE,INCOMPLETE} */
	unsigned int	attr_flags;	/* XATTR_{CREATE,REPLACE} */
	xfs_dahash_t	hashval;	/* hash value of name */
	xfs_ino_t	inumber;	/* input/output inode number */
	struct xfs_inode *dp;		/* directory inode to manipulate */
	struct xfs_trans *trans;	/* current trans (changes over time) */
	xfs_extlen_t	total;		/* total blocks needed, for 1st bmap */
	int		whichfork;	/* data or attribute fork */
	xfs_dablk_t	blkno;		/* blkno of attr leaf of interest */
	int		index;		/* index of attr of interest in blk */
	xfs_dablk_t	rmtblkno;	/* remote attr value starting blkno */
	int		rmtblkcnt;	/* remote attr value block count */
	int		rmtvaluelen;	/* remote attr value length in bytes */
	xfs_dablk_t	blkno2;		/* blkno of 2nd attr leaf of interest */
	int		index2;		/* index of 2nd attr in blk */
	xfs_dablk_t	rmtblkno2;	/* remote attr value starting blkno */
	int		rmtblkcnt2;	/* remote attr value block count */
	int		rmtvaluelen2;	/* remote attr value length in bytes */
	uint32_t	op_flags;	/* operation flags */
	enum xfs_dacmp	cmpresult;	/* name compare result for lookups */
} xfs_da_args_t;

/*
 * Operation flags:
 */
#define XFS_DA_OP_JUSTCHECK	(1u << 0) /* check for ok with no space */
#define XFS_DA_OP_REPLACE	(1u << 1) /* this is an atomic replace op */
#define XFS_DA_OP_ADDNAME	(1u << 2) /* this is an add operation */
#define XFS_DA_OP_OKNOENT	(1u << 3) /* lookup op, ENOENT ok, else die */
#define XFS_DA_OP_CILOOKUP	(1u << 4) /* lookup returns CI name if found */
#define XFS_DA_OP_NOTIME	(1u << 5) /* don't update inode timestamps */
#define XFS_DA_OP_REMOVE	(1u << 6) /* this is a remove operation */
#define XFS_DA_OP_RECOVERY	(1u << 7) /* Log recovery operation */
#define XFS_DA_OP_LOGGED	(1u << 8) /* Use intent items to track op */

#define XFS_DA_OP_FLAGS \
	{ XFS_DA_OP_JUSTCHECK,	"JUSTCHECK" }, \
	{ XFS_DA_OP_REPLACE,	"REPLACE" }, \
	{ XFS_DA_OP_ADDNAME,	"ADDNAME" }, \
	{ XFS_DA_OP_OKNOENT,	"OKNOENT" }, \
	{ XFS_DA_OP_CILOOKUP,	"CILOOKUP" }, \
	{ XFS_DA_OP_NOTIME,	"NOTIME" }, \
	{ XFS_DA_OP_REMOVE,	"REMOVE" }, \
	{ XFS_DA_OP_RECOVERY,	"RECOVERY" }, \
	{ XFS_DA_OP_LOGGED,	"LOGGED" }

/*
 * Storage for holding state during Btree searches and split/join ops.
 *
 * Only need space for 5 intermediate nodes.  With a minimum of 62-way
 * fanout to the Btree, we can support over 900 million directory blocks,
 * which is slightly more than enough.
 */
typedef struct xfs_da_state_blk {
	struct xfs_buf	*bp;		/* buffer containing block */
	xfs_dablk_t	blkno;		/* filesystem blkno of buffer */
	xfs_daddr_t	disk_blkno;	/* on-disk blkno (in BBs) of buffer */
	int		index;		/* relevant index into block */
	xfs_dahash_t	hashval;	/* last hash value in block */
	int		magic;		/* blk's magic number, ie: blk type */
} xfs_da_state_blk_t;

typedef struct xfs_da_state_path {
	int			active;		/* number of active levels */
	xfs_da_state_blk_t	blk[XFS_DA_NODE_MAXDEPTH];
} xfs_da_state_path_t;

typedef struct xfs_da_state {
	xfs_da_args_t		*args;		/* filename arguments */
	struct xfs_mount	*mp;		/* filesystem mount point */
	xfs_da_state_path_t	path;		/* search/split paths */
	xfs_da_state_path_t	altpath;	/* alternate path for join */
	unsigned char		inleaf;		/* insert into 1->lf, 0->splf */
	unsigned char		extravalid;	/* T/F: extrablk is in use */
	unsigned char		extraafter;	/* T/F: extrablk is after new */
	xfs_da_state_blk_t	extrablk;	/* for double-splits on leaves */
						/* for dirv2 extrablk is data */
} xfs_da_state_t;

/*
 * In-core version of the node header to abstract the differences in the v2 and
 * v3 disk format of the headers. Callers need to convert to/from disk format as
 * appropriate.
 */
struct xfs_da3_icnode_hdr {
	uint32_t		forw;
	uint32_t		back;
	uint16_t		magic;
	uint16_t		count;
	uint16_t		level;

	/*
	 * Pointer to the on-disk format entries, which are behind the
	 * variable size (v4 vs v5) header in the on-disk block.
	 */
	struct xfs_da_node_entry *btree;
};

/*
 * Utility macros to aid in logging changed structure fields.
 */
#define XFS_DA_LOGOFF(BASE, ADDR)	((char *)(ADDR) - (char *)(BASE))
#define XFS_DA_LOGRANGE(BASE, ADDR, SIZE)	\
		(uint)(XFS_DA_LOGOFF(BASE, ADDR)), \
		(uint)(XFS_DA_LOGOFF(BASE, ADDR)+(SIZE)-1)

/*========================================================================
 * Function prototypes.
 *========================================================================*/

/*
 * Routines used for growing the Btree.
 */
int	xfs_da3_node_create(struct xfs_da_args *args, xfs_dablk_t blkno,
			    int level, struct xfs_buf **bpp, int whichfork);
int	xfs_da3_split(xfs_da_state_t *state);

/*
 * Routines used for shrinking the Btree.
 */
int	xfs_da3_join(xfs_da_state_t *state);
void	xfs_da3_fixhashpath(struct xfs_da_state *state,
			    struct xfs_da_state_path *path_to_to_fix);

/*
 * Routines used for finding things in the Btree.
 */
int	xfs_da3_node_lookup_int(xfs_da_state_t *state, int *result);
int	xfs_da3_path_shift(xfs_da_state_t *state, xfs_da_state_path_t *path,
					 int forward, int release, int *result);
/*
 * Utility routines.
 */
int	xfs_da3_blk_link(xfs_da_state_t *state, xfs_da_state_blk_t *old_blk,
				       xfs_da_state_blk_t *new_blk);
int	xfs_da3_node_read(struct xfs_trans *tp, struct xfs_inode *dp,
			xfs_dablk_t bno, struct xfs_buf **bpp, int whichfork);
int	xfs_da3_node_read_mapped(struct xfs_trans *tp, struct xfs_inode *dp,
			xfs_daddr_t mappedbno, struct xfs_buf **bpp,
			int whichfork);

/*
 * Utility routines.
 */

#define XFS_DABUF_MAP_HOLE_OK	(1u << 0)

int	xfs_da_grow_inode(xfs_da_args_t *args, xfs_dablk_t *new_blkno);
int	xfs_da_grow_inode_int(struct xfs_da_args *args, xfs_fileoff_t *bno,
			      int count);
int	xfs_da_get_buf(struct xfs_trans *trans, struct xfs_inode *dp,
		xfs_dablk_t bno, struct xfs_buf **bp, int whichfork);
int	xfs_da_read_buf(struct xfs_trans *trans, struct xfs_inode *dp,
		xfs_dablk_t bno, unsigned int flags, struct xfs_buf **bpp,
		int whichfork, const struct xfs_buf_ops *ops);
int	xfs_da_reada_buf(struct xfs_inode *dp, xfs_dablk_t bno,
		unsigned int flags, int whichfork,
		const struct xfs_buf_ops *ops);
int	xfs_da_shrink_inode(xfs_da_args_t *args, xfs_dablk_t dead_blkno,
					  struct xfs_buf *dead_buf);
void	xfs_da_buf_copy(struct xfs_buf *dst, struct xfs_buf *src,
			size_t size);

uint xfs_da_hashname(const uint8_t *name_string, int name_length);
enum xfs_dacmp xfs_da_compname(struct xfs_da_args *args,
				const unsigned char *name, int len);


struct xfs_da_state *xfs_da_state_alloc(struct xfs_da_args *args);
void xfs_da_state_free(xfs_da_state_t *state);
void xfs_da_state_reset(struct xfs_da_state *state, struct xfs_da_args *args);

void	xfs_da3_node_hdr_from_disk(struct xfs_mount *mp,
		struct xfs_da3_icnode_hdr *to, struct xfs_da_intnode *from);
void	xfs_da3_node_hdr_to_disk(struct xfs_mount *mp,
		struct xfs_da_intnode *to, struct xfs_da3_icnode_hdr *from);

extern struct kmem_cache	*xfs_da_state_cache;

#endif	/* __XFS_DA_BTREE_H__ */
Commit	Line	Data
508578f2	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4	2	/*
7b718769	3	* Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
f5ea1100	4	* Copyright (c) 2013 Red Hat, Inc.
7b718769	5	* All Rights Reserved.
1da177e4 LT	6	*/
	7	#ifndef __XFS_DA_BTREE_H__
	8	#define __XFS_DA_BTREE_H__
	9
1da177e4	10	struct xfs_inode;
1da177e4	11	struct xfs_trans;
1da177e4	12
0650b554 DC	13	/*
	14	* Directory/attribute geometry information. There will be one of these for each
	15	* data fork type, and it will be passed around via the xfs_da_args. Global
	16	* structures will be attached to the xfs_mount.
	17	*/
	18	struct xfs_da_geometry {
b16be561 CH	19	unsigned int blksize; /* da block size in bytes */
b16be561 CH	20	unsigned int fsbcount; /* da block size in filesystem blocks */
0650b554 DC	21	uint8_t fsblog; /* log2 of _filesystem_ block size */
0650b554 DC	22	uint8_t blklog; /* log2 of da block size */
3b344413	23	unsigned int node_hdr_size; /* danode header size in bytes */
b16be561 CH	24	unsigned int node_ents; /* # of entries in a danode */
b16be561 CH	25	unsigned int magicpct; /* 37% of block size in bytes */
0650b554	26	xfs_dablk_t datablk; /* blockno of dir data v2 */
545910bc	27	unsigned int leaf_hdr_size; /* dir2 leaf header size */
478c7835	28	unsigned int leaf_max_ents; /* # of entries in dir2 leaf */
0650b554	29	xfs_dablk_t leafblk; /* blockno of leaf data v2 */
ed1d612f	30	unsigned int free_hdr_size; /* dir2 free header size */
5893e4fe	31	unsigned int free_max_bests; /* # of bests entries in dir2 free */
0650b554	32	xfs_dablk_t freeblk; /* blockno of free data v2 */
83a21c18	33	xfs_extnum_t max_extents; /* Max. extents in corresponding fork */
d73e1cee CH	34
	35	xfs_dir2_data_aoff_t data_first_offset;
	36	size_t data_entry_offset;
0650b554 DC	37	};
0650b554 DC	38
1da177e4 LT	39	/*========================================================================
	40	* Btree searching and modification structure definitions.
	41	========================================================================/
	42
5163f95a BN	43	/*
	44	* Search comparison results
	45	*/
	46	enum xfs_dacmp {
	47	XFS_CMP_DIFFERENT, /* names are completely different */
	48	XFS_CMP_EXACT, /* names are exactly the same */
	49	XFS_CMP_CASE /* names are same but differ in case */
	50	};
	51
1da177e4 LT	52	/*
	53	* Structure to ease passing around component names.
	54	*/
	55	typedef struct xfs_da_args {
0650b554	56	struct xfs_da_geometry geo; / da block geometry */
c8ce540d	57	const uint8_t name; / string (maybe not NULL terminated) */
1da177e4	58	int namelen; /* length of string (maybe no NULL) */
c8ce540d	59	uint8_t filetype; /* filetype of inode for directories */
ead189ad	60	void value; / set of bytes (maybe contain NULLs) */
1da177e4	61	int valuelen; /* length of value */
254f800f	62	unsigned int attr_filter; /* XFS_ATTR_{ROOT,SECURE,INCOMPLETE} */
d5f0f49a	63	unsigned int attr_flags; /* XATTR_{CREATE,REPLACE} */
1da177e4 LT	64	xfs_dahash_t hashval; /* hash value of name */
	65	xfs_ino_t inumber; /* input/output inode number */
	66	struct xfs_inode dp; / directory inode to manipulate */
1da177e4 LT	67	struct xfs_trans trans; / current trans (changes over time) */
	68	xfs_extlen_t total; /* total blocks needed, for 1st bmap */
	69	int whichfork; /* data or attribute fork */
	70	xfs_dablk_t blkno; /* blkno of attr leaf of interest */
	71	int index; /* index of attr of interest in blk */
	72	xfs_dablk_t rmtblkno; /* remote attr value starting blkno */
	73	int rmtblkcnt; /* remote attr value block count */
8275cdd0	74	int rmtvaluelen; /* remote attr value length in bytes */
1da177e4 LT	75	xfs_dablk_t blkno2; /* blkno of 2nd attr leaf of interest */
	76	int index2; /* index of 2nd attr in blk */
	77	xfs_dablk_t rmtblkno2; /* remote attr value starting blkno */
	78	int rmtblkcnt2; /* remote attr value block count */
8275cdd0	79	int rmtvaluelen2; /* remote attr value length in bytes */
3402d931	80	uint32_t op_flags; /* operation flags */
5163f95a	81	enum xfs_dacmp cmpresult; /* name compare result for lookups */
1da177e4 LT	82	} xfs_da_args_t;
1da177e4 LT	83
6a178100 BN	84	/*
	85	* Operation flags:
	86	*/
3402d931	87	#define XFS_DA_OP_JUSTCHECK (1u << 0) /* check for ok with no space */
e7f358de	88	#define XFS_DA_OP_REPLACE (1u << 1) /* this is an atomic replace op */
3402d931 DC	89	#define XFS_DA_OP_ADDNAME (1u << 2) /* this is an add operation */
	90	#define XFS_DA_OP_OKNOENT (1u << 3) /* lookup op, ENOENT ok, else die */
	91	#define XFS_DA_OP_CILOOKUP (1u << 4) /* lookup returns CI name if found */
	92	#define XFS_DA_OP_NOTIME (1u << 5) /* don't update inode timestamps */
e7f358de	93	#define XFS_DA_OP_REMOVE (1u << 6) /* this is a remove operation */
fdaf1bb3	94	#define XFS_DA_OP_RECOVERY (1u << 7) /* Log recovery operation */
f4288f01	95	#define XFS_DA_OP_LOGGED (1u << 8) /* Use intent items to track op */
6a178100	96
0b1b213f CH	97	#define XFS_DA_OP_FLAGS \
0b1b213f CH	98	{ XFS_DA_OP_JUSTCHECK, "JUSTCHECK" }, \
e7f358de	99	{ XFS_DA_OP_REPLACE, "REPLACE" }, \
0b1b213f CH	100	{ XFS_DA_OP_ADDNAME, "ADDNAME" }, \
0b1b213f CH	101	{ XFS_DA_OP_OKNOENT, "OKNOENT" }, \
ddbca70c	102	{ XFS_DA_OP_CILOOKUP, "CILOOKUP" }, \
e7f358de	103	{ XFS_DA_OP_NOTIME, "NOTIME" }, \
fdaf1bb3	104	{ XFS_DA_OP_REMOVE, "REMOVE" }, \
f4288f01 DW	105	{ XFS_DA_OP_RECOVERY, "RECOVERY" }, \
f4288f01 DW	106	{ XFS_DA_OP_LOGGED, "LOGGED" }
0b1b213f	107
1da177e4 LT	108	/*
	109	* Storage for holding state during Btree searches and split/join ops.
	110	*
	111	* Only need space for 5 intermediate nodes. With a minimum of 62-way
	112	* fanout to the Btree, we can support over 900 million directory blocks,
	113	* which is slightly more than enough.
	114	*/
	115	typedef struct xfs_da_state_blk {
1d9025e5	116	struct xfs_buf bp; / buffer containing block */
1da177e4 LT	117	xfs_dablk_t blkno; /* filesystem blkno of buffer */
	118	xfs_daddr_t disk_blkno; /* on-disk blkno (in BBs) of buffer */
	119	int index; /* relevant index into block */
	120	xfs_dahash_t hashval; /* last hash value in block */
	121	int magic; /* blk's magic number, ie: blk type */
	122	} xfs_da_state_blk_t;
	123
	124	typedef struct xfs_da_state_path {
	125	int active; /* number of active levels */
	126	xfs_da_state_blk_t blk[XFS_DA_NODE_MAXDEPTH];
	127	} xfs_da_state_path_t;
	128
	129	typedef struct xfs_da_state {
	130	xfs_da_args_t args; / filename arguments */
	131	struct xfs_mount mp; / filesystem mount point */
1da177e4 LT	132	xfs_da_state_path_t path; /* search/split paths */
	133	xfs_da_state_path_t altpath; /* alternate path for join */
	134	unsigned char inleaf; /* insert into 1->lf, 0->splf */
	135	unsigned char extravalid; /* T/F: extrablk is in use */
	136	unsigned char extraafter; /* T/F: extrablk is after new */
9da096fd	137	xfs_da_state_blk_t extrablk; /* for double-splits on leaves */
1da177e4 LT	138	/* for dirv2 extrablk is data */
	139	} xfs_da_state_t;
	140
a39f089a CH	141	/*
	142	* In-core version of the node header to abstract the differences in the v2 and
	143	* v3 disk format of the headers. Callers need to convert to/from disk format as
	144	* appropriate.
	145	*/
	146	struct xfs_da3_icnode_hdr {
	147	uint32_t forw;
	148	uint32_t back;
	149	uint16_t magic;
	150	uint16_t count;
	151	uint16_t level;
51908ca7 CH	152
	153	/*
	154	* Pointer to the on-disk format entries, which are behind the
	155	* variable size (v4 vs v5) header in the on-disk block.
	156	*/
	157	struct xfs_da_node_entry *btree;
a39f089a CH	158	};
a39f089a CH	159
1da177e4 LT	160	/*
	161	* Utility macros to aid in logging changed structure fields.
	162	*/
	163	#define XFS_DA_LOGOFF(BASE, ADDR) ((char )(ADDR) - (char )(BASE))
	164	#define XFS_DA_LOGRANGE(BASE, ADDR, SIZE) \
	165	(uint)(XFS_DA_LOGOFF(BASE, ADDR)), \
	166	(uint)(XFS_DA_LOGOFF(BASE, ADDR)+(SIZE)-1)
	167
1da177e4	168	/*========================================================================
847fff5c	169	* Function prototypes.
1da177e4 LT	170	========================================================================/
	171
	172	/*
	173	* Routines used for growing the Btree.
	174	*/
f5ea1100 DC	175	int xfs_da3_node_create(struct xfs_da_args *args, xfs_dablk_t blkno,
	176	int level, struct xfs_buf **bpp, int whichfork);
	177	int xfs_da3_split(xfs_da_state_t *state);
1da177e4 LT	178
	179	/*
	180	* Routines used for shrinking the Btree.
	181	*/
f5ea1100 DC	182	int xfs_da3_join(xfs_da_state_t *state);
	183	void xfs_da3_fixhashpath(struct xfs_da_state *state,
	184	struct xfs_da_state_path *path_to_to_fix);
1da177e4 LT	185
	186	/*
	187	* Routines used for finding things in the Btree.
	188	*/
f5ea1100 DC	189	int xfs_da3_node_lookup_int(xfs_da_state_t state, int result);
f5ea1100 DC	190	int xfs_da3_path_shift(xfs_da_state_t state, xfs_da_state_path_t path,
1da177e4 LT	191	int forward, int release, int *result);
	192	/*
	193	* Utility routines.
	194	*/
f5ea1100	195	int xfs_da3_blk_link(xfs_da_state_t state, xfs_da_state_blk_t old_blk,
1da177e4	196	xfs_da_state_blk_t *new_blk);
f5ea1100	197	int xfs_da3_node_read(struct xfs_trans tp, struct xfs_inode dp,
02c57f0a CH	198	xfs_dablk_t bno, struct xfs_buf **bpp, int whichfork);
	199	int xfs_da3_node_read_mapped(struct xfs_trans tp, struct xfs_inode dp,
	200	xfs_daddr_t mappedbno, struct xfs_buf **bpp,
	201	int whichfork);
1da177e4 LT	202
	203	/*
	204	* Utility routines.
	205	*/
199e9ba4	206
3402d931	207	#define XFS_DABUF_MAP_HOLE_OK (1u << 0)
199e9ba4	208
1da177e4	209	int xfs_da_grow_inode(xfs_da_args_t args, xfs_dablk_t new_blkno);
77936d02 CH	210	int xfs_da_grow_inode_int(struct xfs_da_args args, xfs_fileoff_t bno,
77936d02 CH	211	int count);
1da177e4	212	int xfs_da_get_buf(struct xfs_trans trans, struct xfs_inode dp,
2911edb6	213	xfs_dablk_t bno, struct xfs_buf **bp, int whichfork);
1da177e4	214	int xfs_da_read_buf(struct xfs_trans trans, struct xfs_inode dp,
cd2c9f1b CH	215	xfs_dablk_t bno, unsigned int flags, struct xfs_buf **bpp,
cd2c9f1b CH	216	int whichfork, const struct xfs_buf_ops *ops);
7a652bbe	217	int xfs_da_reada_buf(struct xfs_inode *dp, xfs_dablk_t bno,
06566fda CH	218	unsigned int flags, int whichfork,
06566fda CH	219	const struct xfs_buf_ops *ops);
1da177e4	220	int xfs_da_shrink_inode(xfs_da_args_t *args, xfs_dablk_t dead_blkno,
1d9025e5	221	struct xfs_buf *dead_buf);
fd45ddb9 ZT	222	void xfs_da_buf_copy(struct xfs_buf dst, struct xfs_buf src,
fd45ddb9 ZT	223	size_t size);
1da177e4	224
c8ce540d	225	uint xfs_da_hashname(const uint8_t *name_string, int name_length);
5163f95a	226	enum xfs_dacmp xfs_da_compname(struct xfs_da_args *args,
2bc75421	227	const unsigned char *name, int len);
5163f95a BN	228
5163f95a BN	229
4491a3dd	230	struct xfs_da_state xfs_da_state_alloc(struct xfs_da_args args);
1da177e4	231	void xfs_da_state_free(xfs_da_state_t *state);
4d0cdd2b	232	void xfs_da_state_reset(struct xfs_da_state state, struct xfs_da_args args);
1da177e4	233
f475dc4d CH	234	void xfs_da3_node_hdr_from_disk(struct xfs_mount *mp,
f475dc4d CH	235	struct xfs_da3_icnode_hdr to, struct xfs_da_intnode from);
e1c8af1e CH	236	void xfs_da3_node_hdr_to_disk(struct xfs_mount *mp,
e1c8af1e CH	237	struct xfs_da_intnode to, struct xfs_da3_icnode_hdr from);
f475dc4d	238
182696fb	239	extern struct kmem_cache *xfs_da_state_cache;
1da177e4 LT	240
1da177e4 LT	241	#endif /* __XFS_DA_BTREE_H__ */