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

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#ifndef __XFS_RTBITMAP_H__
#define	__XFS_RTBITMAP_H__

static inline xfs_rtblock_t
xfs_rtx_to_rtb(
	struct xfs_mount	*mp,
	xfs_rtxnum_t		rtx)
{
	return rtx * mp->m_sb.sb_rextsize;
}

static inline xfs_extlen_t
xfs_rtxlen_to_extlen(
	struct xfs_mount	*mp,
	xfs_rtxlen_t		rtxlen)
{
	return rtxlen * mp->m_sb.sb_rextsize;
}

/* Compute the misalignment between an extent length and a realtime extent .*/
static inline unsigned int
xfs_extlen_to_rtxmod(
	struct xfs_mount	*mp,
	xfs_extlen_t		len)
{
	return len % mp->m_sb.sb_rextsize;
}

static inline xfs_rtxlen_t
xfs_extlen_to_rtxlen(
	struct xfs_mount	*mp,
	xfs_extlen_t		len)
{
	return len / mp->m_sb.sb_rextsize;
}

/* Convert an rt block number into an rt extent number. */
static inline xfs_rtxnum_t
xfs_rtb_to_rtx(
	struct xfs_mount	*mp,
	xfs_rtblock_t		rtbno)
{
	return div_u64(rtbno, mp->m_sb.sb_rextsize);
}

/* Return the offset of an rt block number within an rt extent. */
static inline xfs_extlen_t
xfs_rtb_to_rtxoff(
	struct xfs_mount	*mp,
	xfs_rtblock_t		rtbno)
{
	return do_div(rtbno, mp->m_sb.sb_rextsize);
}

/*
 * Crack an rt block number into an rt extent number and an offset within that
 * rt extent.  Returns the rt extent number directly and the offset in @off.
 */
static inline xfs_rtxnum_t
xfs_rtb_to_rtxrem(
	struct xfs_mount	*mp,
	xfs_rtblock_t		rtbno,
	xfs_extlen_t		*off)
{
	return div_u64_rem(rtbno, mp->m_sb.sb_rextsize, off);
}

/*
 * Functions for walking free space rtextents in the realtime bitmap.
 */
struct xfs_rtalloc_rec {
	xfs_rtxnum_t		ar_startext;
	xfs_rtbxlen_t		ar_extcount;
};

typedef int (*xfs_rtalloc_query_range_fn)(
	struct xfs_mount		*mp,
	struct xfs_trans		*tp,
	const struct xfs_rtalloc_rec	*rec,
	void				*priv);

#ifdef CONFIG_XFS_RT
int xfs_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp,
		  xfs_fileoff_t block, int issum, struct xfs_buf **bpp);
int xfs_rtcheck_range(struct xfs_mount *mp, struct xfs_trans *tp,
		      xfs_rtxnum_t start, xfs_rtxlen_t len, int val,
		      xfs_rtxnum_t *new, int *stat);
int xfs_rtfind_back(struct xfs_mount *mp, struct xfs_trans *tp,
		    xfs_rtxnum_t start, xfs_rtxnum_t limit,
		    xfs_rtxnum_t *rtblock);
int xfs_rtfind_forw(struct xfs_mount *mp, struct xfs_trans *tp,
		    xfs_rtxnum_t start, xfs_rtxnum_t limit,
		    xfs_rtxnum_t *rtblock);
int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp,
		       xfs_rtxnum_t start, xfs_rtxlen_t len, int val);
int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp,
			     int log, xfs_fileoff_t bbno, int delta,
			     struct xfs_buf **rbpp, xfs_fileoff_t *rsb,
			     xfs_suminfo_t *sum);
int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log,
			 xfs_fileoff_t bbno, int delta, struct xfs_buf **rbpp,
			 xfs_fileoff_t *rsb);
int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp,
		     xfs_rtxnum_t start, xfs_rtxlen_t len,
		     struct xfs_buf **rbpp, xfs_fileoff_t *rsb);
int xfs_rtalloc_query_range(struct xfs_mount *mp, struct xfs_trans *tp,
		const struct xfs_rtalloc_rec *low_rec,
		const struct xfs_rtalloc_rec *high_rec,
		xfs_rtalloc_query_range_fn fn, void *priv);
int xfs_rtalloc_query_all(struct xfs_mount *mp, struct xfs_trans *tp,
			  xfs_rtalloc_query_range_fn fn,
			  void *priv);
int xfs_rtalloc_extent_is_free(struct xfs_mount *mp, struct xfs_trans *tp,
			       xfs_rtxnum_t start, xfs_rtxlen_t len,
			       bool *is_free);
/*
 * Free an extent in the realtime subvolume.  Length is expressed in
 * realtime extents, as is the block number.
 */
int					/* error */
xfs_rtfree_extent(
	struct xfs_trans	*tp,	/* transaction pointer */
	xfs_rtxnum_t		start,	/* starting rtext number to free */
	xfs_rtxlen_t		len);	/* length of extent freed */

/* Same as above, but in units of rt blocks. */
int xfs_rtfree_blocks(struct xfs_trans *tp, xfs_fsblock_t rtbno,
		xfs_filblks_t rtlen);
#else /* CONFIG_XFS_RT */
# define xfs_rtfree_extent(t,b,l)			(-ENOSYS)
# define xfs_rtfree_blocks(t,rb,rl)			(-ENOSYS)
# define xfs_rtalloc_query_range(m,t,l,h,f,p)		(-ENOSYS)
# define xfs_rtalloc_query_all(m,t,f,p)			(-ENOSYS)
# define xfs_rtbuf_get(m,t,b,i,p)			(-ENOSYS)
# define xfs_rtalloc_extent_is_free(m,t,s,l,i)		(-ENOSYS)
#endif /* CONFIG_XFS_RT */

#endif /* __XFS_RTBITMAP_H__ */
Commit	Line	Data
13928113 DW	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
	4	* All Rights Reserved.
	5	*/
	6	#ifndef __XFS_RTBITMAP_H__
	7	#define __XFS_RTBITMAP_H__
	8
fa5a3872 DW	9	static inline xfs_rtblock_t
	10	xfs_rtx_to_rtb(
	11	struct xfs_mount *mp,
	12	xfs_rtxnum_t rtx)
	13	{
	14	return rtx * mp->m_sb.sb_rextsize;
	15	}
	16
	17	static inline xfs_extlen_t
	18	xfs_rtxlen_to_extlen(
	19	struct xfs_mount *mp,
	20	xfs_rtxlen_t rtxlen)
	21	{
	22	return rtxlen * mp->m_sb.sb_rextsize;
	23	}
	24
68db60bf DW	25	/* Compute the misalignment between an extent length and a realtime extent .*/
	26	static inline unsigned int
	27	xfs_extlen_to_rtxmod(
	28	struct xfs_mount *mp,
	29	xfs_extlen_t len)
	30	{
	31	return len % mp->m_sb.sb_rextsize;
	32	}
	33
2c2b981b DW	34	static inline xfs_rtxlen_t
	35	xfs_extlen_to_rtxlen(
	36	struct xfs_mount *mp,
	37	xfs_extlen_t len)
	38	{
	39	return len / mp->m_sb.sb_rextsize;
	40	}
	41
5dc3a80d DW	42	/* Convert an rt block number into an rt extent number. */
	43	static inline xfs_rtxnum_t
	44	xfs_rtb_to_rtx(
	45	struct xfs_mount *mp,
	46	xfs_rtblock_t rtbno)
	47	{
	48	return div_u64(rtbno, mp->m_sb.sb_rextsize);
	49	}
	50
	51	/* Return the offset of an rt block number within an rt extent. */
	52	static inline xfs_extlen_t
	53	xfs_rtb_to_rtxoff(
	54	struct xfs_mount *mp,
	55	xfs_rtblock_t rtbno)
	56	{
	57	return do_div(rtbno, mp->m_sb.sb_rextsize);
	58	}
	59
	60	/*
	61	* Crack an rt block number into an rt extent number and an offset within that
	62	* rt extent. Returns the rt extent number directly and the offset in @off.
	63	*/
	64	static inline xfs_rtxnum_t
	65	xfs_rtb_to_rtxrem(
	66	struct xfs_mount *mp,
	67	xfs_rtblock_t rtbno,
	68	xfs_extlen_t *off)
	69	{
	70	return div_u64_rem(rtbno, mp->m_sb.sb_rextsize, off);
	71	}
	72
13928113	73	/*
2d5f216b	74	* Functions for walking free space rtextents in the realtime bitmap.
13928113 DW	75	*/
13928113 DW	76	struct xfs_rtalloc_rec {
2d5f216b	77	xfs_rtxnum_t ar_startext;
f29c3e74	78	xfs_rtbxlen_t ar_extcount;
13928113 DW	79	};
	80
	81	typedef int (*xfs_rtalloc_query_range_fn)(
	82	struct xfs_mount *mp,
	83	struct xfs_trans *tp,
	84	const struct xfs_rtalloc_rec *rec,
	85	void *priv);
	86
	87	#ifdef CONFIG_XFS_RT
	88	int xfs_rtbuf_get(struct xfs_mount mp, struct xfs_trans tp,
03f4de33	89	xfs_fileoff_t block, int issum, struct xfs_buf **bpp);
13928113	90	int xfs_rtcheck_range(struct xfs_mount mp, struct xfs_trans tp,
2d5f216b DW	91	xfs_rtxnum_t start, xfs_rtxlen_t len, int val,
2d5f216b DW	92	xfs_rtxnum_t new, int stat);
13928113	93	int xfs_rtfind_back(struct xfs_mount mp, struct xfs_trans tp,
2d5f216b DW	94	xfs_rtxnum_t start, xfs_rtxnum_t limit,
2d5f216b DW	95	xfs_rtxnum_t *rtblock);
13928113	96	int xfs_rtfind_forw(struct xfs_mount mp, struct xfs_trans tp,
2d5f216b DW	97	xfs_rtxnum_t start, xfs_rtxnum_t limit,
2d5f216b DW	98	xfs_rtxnum_t *rtblock);
13928113	99	int xfs_rtmodify_range(struct xfs_mount mp, struct xfs_trans tp,
2d5f216b	100	xfs_rtxnum_t start, xfs_rtxlen_t len, int val);
13928113	101	int xfs_rtmodify_summary_int(struct xfs_mount mp, struct xfs_trans tp,
03f4de33 DW	102	int log, xfs_fileoff_t bbno, int delta,
03f4de33 DW	103	struct xfs_buf *rbpp, xfs_fileoff_t rsb,
13928113 DW	104	xfs_suminfo_t *sum);
13928113 DW	105	int xfs_rtmodify_summary(struct xfs_mount mp, struct xfs_trans tp, int log,
03f4de33 DW	106	xfs_fileoff_t bbno, int delta, struct xfs_buf **rbpp,
03f4de33 DW	107	xfs_fileoff_t *rsb);
13928113	108	int xfs_rtfree_range(struct xfs_mount mp, struct xfs_trans tp,
2d5f216b	109	xfs_rtxnum_t start, xfs_rtxlen_t len,
03f4de33	110	struct xfs_buf *rbpp, xfs_fileoff_t rsb);
13928113 DW	111	int xfs_rtalloc_query_range(struct xfs_mount mp, struct xfs_trans tp,
	112	const struct xfs_rtalloc_rec *low_rec,
	113	const struct xfs_rtalloc_rec *high_rec,
	114	xfs_rtalloc_query_range_fn fn, void *priv);
	115	int xfs_rtalloc_query_all(struct xfs_mount mp, struct xfs_trans tp,
	116	xfs_rtalloc_query_range_fn fn,
	117	void *priv);
13928113	118	int xfs_rtalloc_extent_is_free(struct xfs_mount mp, struct xfs_trans tp,
2d5f216b	119	xfs_rtxnum_t start, xfs_rtxlen_t len,
13928113 DW	120	bool *is_free);
	121	/*
	122	* Free an extent in the realtime subvolume. Length is expressed in
	123	* realtime extents, as is the block number.
	124	*/
	125	int /* error */
	126	xfs_rtfree_extent(
	127	struct xfs_trans tp, / transaction pointer */
2d5f216b	128	xfs_rtxnum_t start, /* starting rtext number to free */
a684c538	129	xfs_rtxlen_t len); /* length of extent freed */
13928113 DW	130
	131	/* Same as above, but in units of rt blocks. */
	132	int xfs_rtfree_blocks(struct xfs_trans *tp, xfs_fsblock_t rtbno,
	133	xfs_filblks_t rtlen);
	134	#else /* CONFIG_XFS_RT */
	135	# define xfs_rtfree_extent(t,b,l) (-ENOSYS)
	136	# define xfs_rtfree_blocks(t,rb,rl) (-ENOSYS)
	137	# define xfs_rtalloc_query_range(m,t,l,h,f,p) (-ENOSYS)
	138	# define xfs_rtalloc_query_all(m,t,f,p) (-ENOSYS)
	139	# define xfs_rtbuf_get(m,t,b,i,p) (-ENOSYS)
	140	# define xfs_rtalloc_extent_is_free(m,t,s,l,i) (-ENOSYS)
	141	#endif /* CONFIG_XFS_RT */
	142
	143	#endif /* __XFS_RTBITMAP_H__ */