[GitHub/mt8127/android_kernel_alcatel_ttab.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.
 */

typedef struct xfs_extent_32 {
	xfs_dfsbno_t	ext_start;
	xfs_extlen_t	ext_len;
} __attribute__((packed)) xfs_extent_32_t;

typedef struct xfs_extent_64 {
	xfs_dfsbno_t	ext_start;
	xfs_extlen_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 {
	unsigned short		efi_type;	/* efi log item type */
	unsigned short		efi_size;	/* size of this item */
	uint			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;

typedef struct xfs_efi_log_format_32 {
	unsigned short		efi_type;	/* efi log item type */
	unsigned short		efi_size;	/* size of this item */
	uint			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;

typedef struct xfs_efi_log_format_64 {
	unsigned short		efi_type;	/* efi log item type */
	unsigned short		efi_size;	/* size of this item */
	uint			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 {
	unsigned short		efd_type;	/* efd log item type */
	unsigned short		efd_size;	/* size of this item */
	uint			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;

typedef struct xfs_efd_log_format_32 {
	unsigned short		efd_type;	/* efd log item type */
	unsigned short		efd_size;	/* size of this item */
	uint			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;

typedef struct xfs_efd_log_format_64 {
	unsigned short		efd_type;	/* efd log item type */
	unsigned short		efd_size;	/* size of this item */
	uint			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
	36	typedef struct xfs_extent_32 {
	37	xfs_dfsbno_t ext_start;
	38	xfs_extlen_t ext_len;
	39	} __attribute__((packed)) xfs_extent_32_t;
	40
	41	typedef struct xfs_extent_64 {
	42	xfs_dfsbno_t ext_start;
	43	xfs_extlen_t ext_len;
	44	__uint32_t ext_pad;
	45	} xfs_extent_64_t;
	46
1da177e4 LT	47	/*
	48	* This is the structure used to lay out an efi log item in the
	49	* log. The efi_extents field is a variable size array whose
	50	* size is given by efi_nextents.
	51	*/
	52	typedef struct xfs_efi_log_format {
	53	unsigned short efi_type; /* efi log item type */
	54	unsigned short efi_size; /* size of this item */
	55	uint efi_nextents; /* # extents to free */
	56	__uint64_t efi_id; /* efi identifier */
	57	xfs_extent_t efi_extents[1]; /* array of extents to free */
	58	} xfs_efi_log_format_t;
	59
6d192a9b TS	60	typedef struct xfs_efi_log_format_32 {
	61	unsigned short efi_type; /* efi log item type */
	62	unsigned short efi_size; /* size of this item */
	63	uint efi_nextents; /* # extents to free */
	64	__uint64_t efi_id; /* efi identifier */
	65	xfs_extent_32_t efi_extents[1]; /* array of extents to free */
	66	} __attribute__((packed)) xfs_efi_log_format_32_t;
	67
	68	typedef struct xfs_efi_log_format_64 {
	69	unsigned short efi_type; /* efi log item type */
	70	unsigned short efi_size; /* size of this item */
	71	uint efi_nextents; /* # extents to free */
	72	__uint64_t efi_id; /* efi identifier */
	73	xfs_extent_64_t efi_extents[1]; /* array of extents to free */
	74	} xfs_efi_log_format_64_t;
	75
1da177e4 LT	76	/*
	77	* This is the structure used to lay out an efd log item in the
	78	* log. The efd_extents array is a variable size array whose
	79	* size is given by efd_nextents;
	80	*/
	81	typedef struct xfs_efd_log_format {
	82	unsigned short efd_type; /* efd log item type */
	83	unsigned short efd_size; /* size of this item */
	84	uint efd_nextents; /* # of extents freed */
	85	__uint64_t efd_efi_id; /* id of corresponding efi */
	86	xfs_extent_t efd_extents[1]; /* array of extents freed */
	87	} xfs_efd_log_format_t;
	88
6d192a9b TS	89	typedef struct xfs_efd_log_format_32 {
	90	unsigned short efd_type; /* efd log item type */
	91	unsigned short efd_size; /* size of this item */
	92	uint efd_nextents; /* # of extents freed */
	93	__uint64_t efd_efi_id; /* id of corresponding efi */
	94	xfs_extent_32_t efd_extents[1]; /* array of extents freed */
	95	} __attribute__((packed)) xfs_efd_log_format_32_t;
	96
	97	typedef struct xfs_efd_log_format_64 {
	98	unsigned short efd_type; /* efd log item type */
	99	unsigned short efd_size; /* size of this item */
	100	uint efd_nextents; /* # of extents freed */
	101	__uint64_t efd_efi_id; /* id of corresponding efi */
	102	xfs_extent_64_t efd_extents[1]; /* array of extents freed */
	103	} xfs_efd_log_format_64_t;
	104
1da177e4 LT	105
	106	#ifdef __KERNEL__
	107
	108	/*
	109	* Max number of extents in fast allocation path.
	110	*/
	111	#define XFS_EFI_MAX_FAST_EXTENTS 16
	112
	113	/*
	114	* Define EFI flags.
	115	*/
	116	#define XFS_EFI_RECOVERED 0x1
	117	#define XFS_EFI_COMMITTED 0x2
	118	#define XFS_EFI_CANCELED 0x4
	119
	120	/*
	121	* This is the "extent free intention" log item. It is used
	122	* to log the fact that some extents need to be free. It is
	123	* used in conjunction with the "extent free done" log item
	124	* described below.
	125	*/
	126	typedef struct xfs_efi_log_item {
	127	xfs_log_item_t efi_item;
	128	uint efi_flags; /* misc flags */
	129	uint efi_next_extent;
	130	xfs_efi_log_format_t efi_format;
	131	} xfs_efi_log_item_t;
	132
	133	/*
	134	* This is the "extent free done" log item. It is used to log
	135	* the fact that some extents earlier mentioned in an efi item
	136	* have been freed.
	137	*/
	138	typedef struct xfs_efd_log_item {
	139	xfs_log_item_t efd_item;
	140	xfs_efi_log_item_t *efd_efip;
	141	uint efd_next_extent;
	142	xfs_efd_log_format_t efd_format;
	143	} xfs_efd_log_item_t;
	144
	145	/*
	146	* Max number of extents in fast allocation path.
	147	*/
	148	#define XFS_EFD_MAX_FAST_EXTENTS 16
	149
	150	extern struct kmem_zone *xfs_efi_zone;
	151	extern struct kmem_zone *xfs_efd_zone;
	152
	153	xfs_efi_log_item_t xfs_efi_init(struct xfs_mount , uint);
	154	xfs_efd_log_item_t xfs_efd_init(struct xfs_mount , xfs_efi_log_item_t *,
	155	uint);
6d192a9b TS	156	int xfs_efi_copy_format(xfs_log_iovec_t *buf,
6d192a9b TS	157	xfs_efi_log_format_t *dst_efi_fmt);
7d795ca3 CH	158	void xfs_efi_item_free(xfs_efi_log_item_t *);
7d795ca3 CH	159
1da177e4 LT	160	#endif /* __KERNEL__ */
	161
	162	#endif /* __XFS_EXTFREE_ITEM_H__ */