mirror of https://gitee.com/openkylin/linux.git
126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
/*
|
|
* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of version 2 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.
|
|
*
|
|
* Further, this software is distributed without any warranty that it is
|
|
* free of the rightful claim of any third person regarding infringement
|
|
* or the like. Any license provided herein, whether implied or
|
|
* otherwise, applies only to this software file. Patent licenses, if
|
|
* any, provided herein do not apply to combinations of this program with
|
|
* other software, or any other product whatsoever.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write the Free Software Foundation, Inc., 59
|
|
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
|
|
*
|
|
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
|
|
* Mountain View, CA 94043, or:
|
|
*
|
|
* http://www.sgi.com
|
|
*
|
|
* For further information regarding this notice, see:
|
|
*
|
|
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
|
|
*/
|
|
#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;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
|
|
#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);
|
|
|
|
void xfs_efi_item_free(xfs_efi_log_item_t *);
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* __XFS_EXTFREE_ITEM_H__ */
|