[mirror_ubuntu-artful-kernel.git] / fs / xfs / libxfs / xfs_rmap.h

/*
 * Copyright (C) 2016 Oracle.  All Rights Reserved.
 *
 * Author: Darrick J. Wong <darrick.wong@oracle.com>
 *
 * 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; either version 2
 * of the License, or (at your option) any later version.
 *
 * 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_RMAP_H__
#define __XFS_RMAP_H__

static inline void
xfs_rmap_ag_owner(
	struct xfs_owner_info	*oi,
	uint64_t		owner)
{
	oi->oi_owner = owner;
	oi->oi_offset = 0;
	oi->oi_flags = 0;
}

static inline void
xfs_rmap_ino_bmbt_owner(
	struct xfs_owner_info	*oi,
	xfs_ino_t		ino,
	int			whichfork)
{
	oi->oi_owner = ino;
	oi->oi_offset = 0;
	oi->oi_flags = XFS_OWNER_INFO_BMBT_BLOCK;
	if (whichfork == XFS_ATTR_FORK)
		oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
}

static inline void
xfs_rmap_ino_owner(
	struct xfs_owner_info	*oi,
	xfs_ino_t		ino,
	int			whichfork,
	xfs_fileoff_t		offset)
{
	oi->oi_owner = ino;
	oi->oi_offset = offset;
	oi->oi_flags = 0;
	if (whichfork == XFS_ATTR_FORK)
		oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
}

static inline void
xfs_rmap_skip_owner_update(
	struct xfs_owner_info	*oi)
{
	oi->oi_owner = XFS_RMAP_OWN_UNKNOWN;
}

/* Reverse mapping functions. */

struct xfs_buf;

static inline __u64
xfs_rmap_irec_offset_pack(
	const struct xfs_rmap_irec	*irec)
{
	__u64			x;

	x = XFS_RMAP_OFF(irec->rm_offset);
	if (irec->rm_flags & XFS_RMAP_ATTR_FORK)
		x |= XFS_RMAP_OFF_ATTR_FORK;
	if (irec->rm_flags & XFS_RMAP_BMBT_BLOCK)
		x |= XFS_RMAP_OFF_BMBT_BLOCK;
	if (irec->rm_flags & XFS_RMAP_UNWRITTEN)
		x |= XFS_RMAP_OFF_UNWRITTEN;
	return x;
}

static inline int
xfs_rmap_irec_offset_unpack(
	__u64			offset,
	struct xfs_rmap_irec	*irec)
{
	if (offset & ~(XFS_RMAP_OFF_MASK | XFS_RMAP_OFF_FLAGS))
		return -EFSCORRUPTED;
	irec->rm_offset = XFS_RMAP_OFF(offset);
	if (offset & XFS_RMAP_OFF_ATTR_FORK)
		irec->rm_flags |= XFS_RMAP_ATTR_FORK;
	if (offset & XFS_RMAP_OFF_BMBT_BLOCK)
		irec->rm_flags |= XFS_RMAP_BMBT_BLOCK;
	if (offset & XFS_RMAP_OFF_UNWRITTEN)
		irec->rm_flags |= XFS_RMAP_UNWRITTEN;
	return 0;
}

static inline void
xfs_owner_info_unpack(
	struct xfs_owner_info	*oinfo,
	uint64_t		*owner,
	uint64_t		*offset,
	unsigned int		*flags)
{
	unsigned int		r = 0;

	*owner = oinfo->oi_owner;
	*offset = oinfo->oi_offset;
	if (oinfo->oi_flags & XFS_OWNER_INFO_ATTR_FORK)
		r |= XFS_RMAP_ATTR_FORK;
	if (oinfo->oi_flags & XFS_OWNER_INFO_BMBT_BLOCK)
		r |= XFS_RMAP_BMBT_BLOCK;
	*flags = r;
}

static inline void
xfs_owner_info_pack(
	struct xfs_owner_info	*oinfo,
	uint64_t		owner,
	uint64_t		offset,
	unsigned int		flags)
{
	oinfo->oi_owner = owner;
	oinfo->oi_offset = XFS_RMAP_OFF(offset);
	oinfo->oi_flags = 0;
	if (flags & XFS_RMAP_ATTR_FORK)
		oinfo->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
	if (flags & XFS_RMAP_BMBT_BLOCK)
		oinfo->oi_flags |= XFS_OWNER_INFO_BMBT_BLOCK;
}

int xfs_rmap_alloc(struct xfs_trans *tp, struct xfs_buf *agbp,
		   xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
		   struct xfs_owner_info *oinfo);
int xfs_rmap_free(struct xfs_trans *tp, struct xfs_buf *agbp,
		  xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
		  struct xfs_owner_info *oinfo);

int xfs_rmap_lookup_le(struct xfs_btree_cur *cur, xfs_agblock_t bno,
		xfs_extlen_t len, uint64_t owner, uint64_t offset,
		unsigned int flags, int *stat);
int xfs_rmap_lookup_eq(struct xfs_btree_cur *cur, xfs_agblock_t bno,
		xfs_extlen_t len, uint64_t owner, uint64_t offset,
		unsigned int flags, int *stat);
int xfs_rmap_insert(struct xfs_btree_cur *rcur, xfs_agblock_t agbno,
		xfs_extlen_t len, uint64_t owner, uint64_t offset,
		unsigned int flags);
int xfs_rmap_get_rec(struct xfs_btree_cur *cur, struct xfs_rmap_irec *irec,
		int *stat);

typedef int (*xfs_rmap_query_range_fn)(
	struct xfs_btree_cur	*cur,
	struct xfs_rmap_irec	*rec,
	void			*priv);

int xfs_rmap_query_range(struct xfs_btree_cur *cur,
		struct xfs_rmap_irec *low_rec, struct xfs_rmap_irec *high_rec,
		xfs_rmap_query_range_fn fn, void *priv);
int xfs_rmap_query_all(struct xfs_btree_cur *cur, xfs_rmap_query_range_fn fn,
		void *priv);

enum xfs_rmap_intent_type {
	XFS_RMAP_MAP,
	XFS_RMAP_MAP_SHARED,
	XFS_RMAP_UNMAP,
	XFS_RMAP_UNMAP_SHARED,
	XFS_RMAP_CONVERT,
	XFS_RMAP_CONVERT_SHARED,
	XFS_RMAP_ALLOC,
	XFS_RMAP_FREE,
};

struct xfs_rmap_intent {
	struct list_head			ri_list;
	enum xfs_rmap_intent_type		ri_type;
	__uint64_t				ri_owner;
	int					ri_whichfork;
	struct xfs_bmbt_irec			ri_bmap;
};

/* functions for updating the rmapbt based on bmbt map/unmap operations */
int xfs_rmap_map_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
		struct xfs_inode *ip, int whichfork,
		struct xfs_bmbt_irec *imap);
int xfs_rmap_unmap_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
		struct xfs_inode *ip, int whichfork,
		struct xfs_bmbt_irec *imap);
int xfs_rmap_convert_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
		struct xfs_inode *ip, int whichfork,
		struct xfs_bmbt_irec *imap);
int xfs_rmap_alloc_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
		xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
		__uint64_t owner);
int xfs_rmap_free_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
		xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
		__uint64_t owner);

void xfs_rmap_finish_one_cleanup(struct xfs_trans *tp,
		struct xfs_btree_cur *rcur, int error);
int xfs_rmap_finish_one(struct xfs_trans *tp, enum xfs_rmap_intent_type type,
		__uint64_t owner, int whichfork, xfs_fileoff_t startoff,
		xfs_fsblock_t startblock, xfs_filblks_t blockcount,
		xfs_exntst_t state, struct xfs_btree_cur **pcur);

int xfs_rmap_find_left_neighbor(struct xfs_btree_cur *cur, xfs_agblock_t bno,
		uint64_t owner, uint64_t offset, unsigned int flags,
		struct xfs_rmap_irec *irec, int	*stat);
int xfs_rmap_lookup_le_range(struct xfs_btree_cur *cur, xfs_agblock_t bno,
		uint64_t owner, uint64_t offset, unsigned int flags,
		struct xfs_rmap_irec *irec, int	*stat);

#endif	/* __XFS_RMAP_H__ */
Commit	Line	Data
340785cc DW	1	/*
	2	* Copyright (C) 2016 Oracle. All Rights Reserved.
	3	*
	4	* Author: Darrick J. Wong <darrick.wong@oracle.com>
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version 2
	9	* of the License, or (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it would be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write the Free Software Foundation,
	18	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
	19	*/
	20	#ifndef __XFS_RMAP_H__
	21	#define __XFS_RMAP_H__
	22
	23	static inline void
	24	xfs_rmap_ag_owner(
	25	struct xfs_owner_info *oi,
	26	uint64_t owner)
	27	{
	28	oi->oi_owner = owner;
	29	oi->oi_offset = 0;
	30	oi->oi_flags = 0;
	31	}
	32
	33	static inline void
	34	xfs_rmap_ino_bmbt_owner(
	35	struct xfs_owner_info *oi,
	36	xfs_ino_t ino,
	37	int whichfork)
	38	{
	39	oi->oi_owner = ino;
	40	oi->oi_offset = 0;
	41	oi->oi_flags = XFS_OWNER_INFO_BMBT_BLOCK;
	42	if (whichfork == XFS_ATTR_FORK)
	43	oi->oi_flags \|= XFS_OWNER_INFO_ATTR_FORK;
	44	}
	45
	46	static inline void
	47	xfs_rmap_ino_owner(
	48	struct xfs_owner_info *oi,
	49	xfs_ino_t ino,
	50	int whichfork,
	51	xfs_fileoff_t offset)
	52	{
	53	oi->oi_owner = ino;
	54	oi->oi_offset = offset;
	55	oi->oi_flags = 0;
	56	if (whichfork == XFS_ATTR_FORK)
	57	oi->oi_flags \|= XFS_OWNER_INFO_ATTR_FORK;
	58	}
	59
	60	static inline void
	61	xfs_rmap_skip_owner_update(
	62	struct xfs_owner_info *oi)
	63	{
	64	oi->oi_owner = XFS_RMAP_OWN_UNKNOWN;
65	}
66
673930c3 DW	67	/* Reverse mapping functions. */
	68
	69	struct xfs_buf;
	70
035e00ac DW	71	static inline __u64
	72	xfs_rmap_irec_offset_pack(
	73	const struct xfs_rmap_irec *irec)
	74	{
	75	__u64 x;
	76
	77	x = XFS_RMAP_OFF(irec->rm_offset);
	78	if (irec->rm_flags & XFS_RMAP_ATTR_FORK)
	79	x \|= XFS_RMAP_OFF_ATTR_FORK;
	80	if (irec->rm_flags & XFS_RMAP_BMBT_BLOCK)
	81	x \|= XFS_RMAP_OFF_BMBT_BLOCK;
	82	if (irec->rm_flags & XFS_RMAP_UNWRITTEN)
	83	x \|= XFS_RMAP_OFF_UNWRITTEN;
	84	return x;
	85	}
	86
	87	static inline int
	88	xfs_rmap_irec_offset_unpack(
	89	__u64 offset,
	90	struct xfs_rmap_irec *irec)
	91	{
	92	if (offset & ~(XFS_RMAP_OFF_MASK \| XFS_RMAP_OFF_FLAGS))
	93	return -EFSCORRUPTED;
	94	irec->rm_offset = XFS_RMAP_OFF(offset);
	95	if (offset & XFS_RMAP_OFF_ATTR_FORK)
	96	irec->rm_flags \|= XFS_RMAP_ATTR_FORK;
	97	if (offset & XFS_RMAP_OFF_BMBT_BLOCK)
	98	irec->rm_flags \|= XFS_RMAP_BMBT_BLOCK;
	99	if (offset & XFS_RMAP_OFF_UNWRITTEN)
	100	irec->rm_flags \|= XFS_RMAP_UNWRITTEN;
	101	return 0;
	102	}
	103
	104	static inline void
	105	xfs_owner_info_unpack(
	106	struct xfs_owner_info *oinfo,
	107	uint64_t *owner,
	108	uint64_t *offset,
	109	unsigned int *flags)
	110	{
	111	unsigned int r = 0;
	112
	113	*owner = oinfo->oi_owner;
	114	*offset = oinfo->oi_offset;
	115	if (oinfo->oi_flags & XFS_OWNER_INFO_ATTR_FORK)
	116	r \|= XFS_RMAP_ATTR_FORK;
	117	if (oinfo->oi_flags & XFS_OWNER_INFO_BMBT_BLOCK)
	118	r \|= XFS_RMAP_BMBT_BLOCK;
	119	*flags = r;
	120	}
	121
	122	static inline void
	123	xfs_owner_info_pack(
	124	struct xfs_owner_info *oinfo,
	125	uint64_t owner,
	126	uint64_t offset,
	127	unsigned int flags)
	128	{
	129	oinfo->oi_owner = owner;
	130	oinfo->oi_offset = XFS_RMAP_OFF(offset);
	131	oinfo->oi_flags = 0;
	132	if (flags & XFS_RMAP_ATTR_FORK)
	133	oinfo->oi_flags \|= XFS_OWNER_INFO_ATTR_FORK;
	134	if (flags & XFS_RMAP_BMBT_BLOCK)
135	oinfo->oi_flags \|= XFS_OWNER_INFO_BMBT_BLOCK;
136	}
137
673930c3 DW	138	int xfs_rmap_alloc(struct xfs_trans tp, struct xfs_buf agbp,
	139	xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
	140	struct xfs_owner_info *oinfo);
	141	int xfs_rmap_free(struct xfs_trans tp, struct xfs_buf agbp,
	142	xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
	143	struct xfs_owner_info *oinfo);
	144
4b8ed677 DW	145	int xfs_rmap_lookup_le(struct xfs_btree_cur *cur, xfs_agblock_t bno,
	146	xfs_extlen_t len, uint64_t owner, uint64_t offset,
	147	unsigned int flags, int *stat);
	148	int xfs_rmap_lookup_eq(struct xfs_btree_cur *cur, xfs_agblock_t bno,
	149	xfs_extlen_t len, uint64_t owner, uint64_t offset,
	150	unsigned int flags, int *stat);
abf09233 DW	151	int xfs_rmap_insert(struct xfs_btree_cur *rcur, xfs_agblock_t agbno,
	152	xfs_extlen_t len, uint64_t owner, uint64_t offset,
	153	unsigned int flags);
4b8ed677 DW	154	int xfs_rmap_get_rec(struct xfs_btree_cur cur, struct xfs_rmap_irec irec,
	155	int *stat);
	156
c543838a DW	157	typedef int (*xfs_rmap_query_range_fn)(
	158	struct xfs_btree_cur *cur,
	159	struct xfs_rmap_irec *rec,
	160	void *priv);
	161
	162	int xfs_rmap_query_range(struct xfs_btree_cur *cur,
	163	struct xfs_rmap_irec low_rec, struct xfs_rmap_irec high_rec,
	164	xfs_rmap_query_range_fn fn, void *priv);
e9a2599a DW	165	int xfs_rmap_query_all(struct xfs_btree_cur *cur, xfs_rmap_query_range_fn fn,
e9a2599a DW	166	void *priv);
c543838a	167
5880f2d7 DW	168	enum xfs_rmap_intent_type {
	169	XFS_RMAP_MAP,
	170	XFS_RMAP_MAP_SHARED,
	171	XFS_RMAP_UNMAP,
	172	XFS_RMAP_UNMAP_SHARED,
	173	XFS_RMAP_CONVERT,
	174	XFS_RMAP_CONVERT_SHARED,
	175	XFS_RMAP_ALLOC,
	176	XFS_RMAP_FREE,
	177	};
	178
	179	struct xfs_rmap_intent {
	180	struct list_head ri_list;
	181	enum xfs_rmap_intent_type ri_type;
	182	__uint64_t ri_owner;
	183	int ri_whichfork;
	184	struct xfs_bmbt_irec ri_bmap;
	185	};
	186
9c194644 DW	187	/* functions for updating the rmapbt based on bmbt map/unmap operations */
	188	int xfs_rmap_map_extent(struct xfs_mount mp, struct xfs_defer_ops dfops,
	189	struct xfs_inode *ip, int whichfork,
	190	struct xfs_bmbt_irec *imap);
	191	int xfs_rmap_unmap_extent(struct xfs_mount mp, struct xfs_defer_ops dfops,
	192	struct xfs_inode *ip, int whichfork,
	193	struct xfs_bmbt_irec *imap);
	194	int xfs_rmap_convert_extent(struct xfs_mount mp, struct xfs_defer_ops dfops,
	195	struct xfs_inode *ip, int whichfork,
	196	struct xfs_bmbt_irec *imap);
	197	int xfs_rmap_alloc_extent(struct xfs_mount mp, struct xfs_defer_ops dfops,
	198	xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
	199	__uint64_t owner);
	200	int xfs_rmap_free_extent(struct xfs_mount mp, struct xfs_defer_ops dfops,
	201	xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
	202	__uint64_t owner);
	203
	204	void xfs_rmap_finish_one_cleanup(struct xfs_trans *tp,
	205	struct xfs_btree_cur *rcur, int error);
	206	int xfs_rmap_finish_one(struct xfs_trans *tp, enum xfs_rmap_intent_type type,
	207	__uint64_t owner, int whichfork, xfs_fileoff_t startoff,
	208	xfs_fsblock_t startblock, xfs_filblks_t blockcount,
	209	xfs_exntst_t state, struct xfs_btree_cur **pcur);
	210
ceeb9c83 DW	211	int xfs_rmap_find_left_neighbor(struct xfs_btree_cur *cur, xfs_agblock_t bno,
	212	uint64_t owner, uint64_t offset, unsigned int flags,
	213	struct xfs_rmap_irec irec, int stat);
	214	int xfs_rmap_lookup_le_range(struct xfs_btree_cur *cur, xfs_agblock_t bno,
	215	uint64_t owner, uint64_t offset, unsigned int flags,
	216	struct xfs_rmap_irec irec, int stat);
	217
340785cc	218	#endif /* __XFS_RMAP_H__ */