[linux-2.6-block.git] / fs / xfs / xfs_extfree_item.h

/*
 * Copyright (c) 2000,2005 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_EXTFREE_ITEM_H__
#define	__XFS_EXTFREE_ITEM_H__

struct xfs_mount;
struct kmem_zone;

typedef struct xfs_extent {
	xfs_dfsbno_t	ext_start;
	xfs_extlen_t	ext_len;
} xfs_extent_t;

/*
 * Since an xfs_extent_t has types (start:64, len: 32)
 * there are different alignments on 32 bit and 64 bit kernels.
 * So we provide the different variants for use by a
 * conversion routine.
 */

#ifndef HAVE_FORMAT32
typedef struct xfs_extent_32 {
	__uint64_t	ext_start;
	__uint32_t	ext_len;
} __attribute__((packed)) xfs_extent_32_t;
#endif

typedef struct xfs_extent_64 {
	__uint64_t	ext_start;
	__uint32_t	ext_len;
	__uint32_t	ext_pad;
} xfs_extent_64_t;

/*
 * This is the structure used to lay out an efi log item in the
 * log.  The efi_extents field is a variable size array whose
 * size is given by efi_nextents.
 */
typedef struct xfs_efi_log_format {
	__uint16_t		efi_type;	/* efi log item type */
	__uint16_t		efi_size;	/* size of this item */
	__uint32_t		efi_nextents;	/* # extents to free */
	__uint64_t		efi_id;		/* efi identifier */
	xfs_extent_t		efi_extents[1];	/* array of extents to free */
} xfs_efi_log_format_t;

#ifndef HAVE_FORMAT32
typedef struct xfs_efi_log_format_32 {
	__uint16_t		efi_type;	/* efi log item type */
	__uint16_t		efi_size;	/* size of this item */
	__uint32_t		efi_nextents;	/* # extents to free */
	__uint64_t		efi_id;		/* efi identifier */
	xfs_extent_32_t		efi_extents[1];	/* array of extents to free */
} __attribute__((packed)) xfs_efi_log_format_32_t;
#endif

typedef struct xfs_efi_log_format_64 {
	__uint16_t		efi_type;	/* efi log item type */
	__uint16_t		efi_size;	/* size of this item */
	__uint32_t		efi_nextents;	/* # extents to free */
	__uint64_t		efi_id;		/* efi identifier */
	xfs_extent_64_t		efi_extents[1];	/* array of extents to free */
} xfs_efi_log_format_64_t;

/*
 * This is the structure used to lay out an efd log item in the
 * log.  The efd_extents array is a variable size array whose
 * size is given by efd_nextents;
 */
typedef struct xfs_efd_log_format {
	__uint16_t		efd_type;	/* efd log item type */
	__uint16_t		efd_size;	/* size of this item */
	__uint32_t		efd_nextents;	/* # of extents freed */
	__uint64_t		efd_efi_id;	/* id of corresponding efi */
	xfs_extent_t		efd_extents[1];	/* array of extents freed */
} xfs_efd_log_format_t;

#ifndef HAVE_FORMAT32
typedef struct xfs_efd_log_format_32 {
	__uint16_t		efd_type;	/* efd log item type */
	__uint16_t		efd_size;	/* size of this item */
	__uint32_t		efd_nextents;	/* # of extents freed */
	__uint64_t		efd_efi_id;	/* id of corresponding efi */
	xfs_extent_32_t		efd_extents[1];	/* array of extents freed */
} __attribute__((packed)) xfs_efd_log_format_32_t;
#endif

typedef struct xfs_efd_log_format_64 {
	__uint16_t		efd_type;	/* efd log item type */
	__uint16_t		efd_size;	/* size of this item */
	__uint32_t		efd_nextents;	/* # of extents freed */
	__uint64_t		efd_efi_id;	/* id of corresponding efi */
	xfs_extent_64_t		efd_extents[1];	/* array of extents freed */
} xfs_efd_log_format_64_t;


#ifdef __KERNEL__

/*
 * Max number of extents in fast allocation path.
 */
#define	XFS_EFI_MAX_FAST_EXTENTS	16

/*
 * Define EFI flags.
 */
#define	XFS_EFI_RECOVERED	0x1
#define	XFS_EFI_COMMITTED	0x2
#define	XFS_EFI_CANCELED	0x4

/*
 * This is the "extent free intention" log item.  It is used
 * to log the fact that some extents need to be free.  It is
 * used in conjunction with the "extent free done" log item
 * described below.
 */
typedef struct xfs_efi_log_item {
	xfs_log_item_t		efi_item;
	uint			efi_flags;	/* misc flags */
	uint			efi_next_extent;
	xfs_efi_log_format_t	efi_format;
} xfs_efi_log_item_t;

/*
 * This is the "extent free done" log item.  It is used to log
 * the fact that some extents earlier mentioned in an efi item
 * have been freed.
 */
typedef struct xfs_efd_log_item {
	xfs_log_item_t		efd_item;
	xfs_efi_log_item_t	*efd_efip;
	uint			efd_next_extent;
	xfs_efd_log_format_t	efd_format;
} xfs_efd_log_item_t;

/*
 * Max number of extents in fast allocation path.
 */
#define	XFS_EFD_MAX_FAST_EXTENTS	16

extern struct kmem_zone	*xfs_efi_zone;
extern struct kmem_zone	*xfs_efd_zone;

xfs_efi_log_item_t	*xfs_efi_init(struct xfs_mount *, uint);
xfs_efd_log_item_t	*xfs_efd_init(struct xfs_mount *, xfs_efi_log_item_t *,
				      uint);
int			xfs_efi_copy_format(xfs_log_iovec_t *buf,
					    xfs_efi_log_format_t *dst_efi_fmt);
void			xfs_efi_item_free(xfs_efi_log_item_t *);

#endif	/* __KERNEL__ */

#endif	/* __XFS_EXTFREE_ITEM_H__ */
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000,2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 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.
1da177e4	13	*
7b718769 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
1da177e4 LT	17	*/
	18	#ifndef __XFS_EXTFREE_ITEM_H__
	19	#define __XFS_EXTFREE_ITEM_H__
	20
	21	struct xfs_mount;
	22	struct kmem_zone;
	23
	24	typedef struct xfs_extent {
	25	xfs_dfsbno_t ext_start;
	26	xfs_extlen_t ext_len;
	27	} xfs_extent_t;
	28
6d192a9b TS	29	/*
	30	* Since an xfs_extent_t has types (start:64, len: 32)
	31	* there are different alignments on 32 bit and 64 bit kernels.
	32	* So we provide the different variants for use by a
	33	* conversion routine.
	34	*/
	35
128dabc5	36	#ifndef HAVE_FORMAT32
6d192a9b	37	typedef struct xfs_extent_32 {
128dabc5 TS	38	__uint64_t ext_start;
128dabc5 TS	39	__uint32_t ext_len;
6d192a9b	40	} __attribute__((packed)) xfs_extent_32_t;
128dabc5	41	#endif
6d192a9b TS	42
6d192a9b TS	43	typedef struct xfs_extent_64 {
128dabc5 TS	44	__uint64_t ext_start;
128dabc5 TS	45	__uint32_t ext_len;
6d192a9b TS	46	__uint32_t ext_pad;
	47	} xfs_extent_64_t;
	48
1da177e4 LT	49	/*
	50	* This is the structure used to lay out an efi log item in the
	51	* log. The efi_extents field is a variable size array whose
	52	* size is given by efi_nextents.
	53	*/
	54	typedef struct xfs_efi_log_format {
128dabc5 TS	55	__uint16_t efi_type; /* efi log item type */
	56	__uint16_t efi_size; /* size of this item */
	57	__uint32_t efi_nextents; /* # extents to free */
1da177e4 LT	58	__uint64_t efi_id; /* efi identifier */
	59	xfs_extent_t efi_extents[1]; /* array of extents to free */
	60	} xfs_efi_log_format_t;
	61
128dabc5	62	#ifndef HAVE_FORMAT32
6d192a9b	63	typedef struct xfs_efi_log_format_32 {
128dabc5 TS	64	__uint16_t efi_type; /* efi log item type */
	65	__uint16_t efi_size; /* size of this item */
	66	__uint32_t efi_nextents; /* # extents to free */
6d192a9b TS	67	__uint64_t efi_id; /* efi identifier */
	68	xfs_extent_32_t efi_extents[1]; /* array of extents to free */
	69	} __attribute__((packed)) xfs_efi_log_format_32_t;
128dabc5	70	#endif
6d192a9b TS	71
6d192a9b TS	72	typedef struct xfs_efi_log_format_64 {
128dabc5 TS	73	__uint16_t efi_type; /* efi log item type */
	74	__uint16_t efi_size; /* size of this item */
	75	__uint32_t efi_nextents; /* # extents to free */
6d192a9b TS	76	__uint64_t efi_id; /* efi identifier */
	77	xfs_extent_64_t efi_extents[1]; /* array of extents to free */
	78	} xfs_efi_log_format_64_t;
	79
1da177e4 LT	80	/*
	81	* This is the structure used to lay out an efd log item in the
	82	* log. The efd_extents array is a variable size array whose
	83	* size is given by efd_nextents;
	84	*/
	85	typedef struct xfs_efd_log_format {
128dabc5 TS	86	__uint16_t efd_type; /* efd log item type */
	87	__uint16_t efd_size; /* size of this item */
	88	__uint32_t efd_nextents; /* # of extents freed */
1da177e4 LT	89	__uint64_t efd_efi_id; /* id of corresponding efi */
	90	xfs_extent_t efd_extents[1]; /* array of extents freed */
	91	} xfs_efd_log_format_t;
	92
128dabc5	93	#ifndef HAVE_FORMAT32
6d192a9b	94	typedef struct xfs_efd_log_format_32 {
128dabc5 TS	95	__uint16_t efd_type; /* efd log item type */
	96	__uint16_t efd_size; /* size of this item */
	97	__uint32_t efd_nextents; /* # of extents freed */
6d192a9b TS	98	__uint64_t efd_efi_id; /* id of corresponding efi */
	99	xfs_extent_32_t efd_extents[1]; /* array of extents freed */
	100	} __attribute__((packed)) xfs_efd_log_format_32_t;
128dabc5	101	#endif
6d192a9b TS	102
6d192a9b TS	103	typedef struct xfs_efd_log_format_64 {
128dabc5 TS	104	__uint16_t efd_type; /* efd log item type */
	105	__uint16_t efd_size; /* size of this item */
	106	__uint32_t efd_nextents; /* # of extents freed */
6d192a9b TS	107	__uint64_t efd_efi_id; /* id of corresponding efi */
	108	xfs_extent_64_t efd_extents[1]; /* array of extents freed */
	109	} xfs_efd_log_format_64_t;
	110
1da177e4 LT	111
	112	#ifdef __KERNEL__
	113
	114	/*
	115	* Max number of extents in fast allocation path.
	116	*/
	117	#define XFS_EFI_MAX_FAST_EXTENTS 16
	118
	119	/*
	120	* Define EFI flags.
	121	*/
	122	#define XFS_EFI_RECOVERED 0x1
	123	#define XFS_EFI_COMMITTED 0x2
	124	#define XFS_EFI_CANCELED 0x4
	125
	126	/*
	127	* This is the "extent free intention" log item. It is used
	128	* to log the fact that some extents need to be free. It is
	129	* used in conjunction with the "extent free done" log item
	130	* described below.
	131	*/
	132	typedef struct xfs_efi_log_item {
	133	xfs_log_item_t efi_item;
	134	uint efi_flags; /* misc flags */
	135	uint efi_next_extent;
	136	xfs_efi_log_format_t efi_format;
	137	} xfs_efi_log_item_t;
	138
	139	/*
	140	* This is the "extent free done" log item. It is used to log
	141	* the fact that some extents earlier mentioned in an efi item
	142	* have been freed.
	143	*/
	144	typedef struct xfs_efd_log_item {
	145	xfs_log_item_t efd_item;
	146	xfs_efi_log_item_t *efd_efip;
	147	uint efd_next_extent;
	148	xfs_efd_log_format_t efd_format;
	149	} xfs_efd_log_item_t;
	150
	151	/*
	152	* Max number of extents in fast allocation path.
	153	*/
	154	#define XFS_EFD_MAX_FAST_EXTENTS 16
	155
	156	extern struct kmem_zone *xfs_efi_zone;
	157	extern struct kmem_zone *xfs_efd_zone;
	158
	159	xfs_efi_log_item_t xfs_efi_init(struct xfs_mount , uint);
	160	xfs_efd_log_item_t xfs_efd_init(struct xfs_mount , xfs_efi_log_item_t *,
	161	uint);
6d192a9b TS	162	int xfs_efi_copy_format(xfs_log_iovec_t *buf,
6d192a9b TS	163	xfs_efi_log_format_t *dst_efi_fmt);
7d795ca3 CH	164	void xfs_efi_item_free(xfs_efi_log_item_t *);
7d795ca3 CH	165
1da177e4 LT	166	#endif /* __KERNEL__ */
	167
	168	#endif /* __XFS_EXTFREE_ITEM_H__ */