1/* 2 * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of version 2 of the GNU General Public License as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it would be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 11 * 12 * Further, this software is distributed without any warranty that it is 13 * free of the rightful claim of any third person regarding infringement 14 * or the like. Any license provided herein, whether implied or 15 * otherwise, applies only to this software file. Patent licenses, if 16 * any, provided herein do not apply to combinations of this program with 17 * other software, or any other product whatsoever. 18 * 19 * You should have received a copy of the GNU General Public License along 20 * with this program; if not, write the Free Software Foundation, Inc., 59 21 * Temple Place - Suite 330, Boston MA 02111-1307, USA. 22 * 23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, 24 * Mountain View, CA 94043, or: 25 * 26 * http://www.sgi.com 27 * 28 * For further information regarding this notice, see: 29 * 30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ 31 */ 32#ifndef __XFS_EXTFREE_ITEM_H__ 33#define __XFS_EXTFREE_ITEM_H__ 34 35struct xfs_mount; 36struct kmem_zone; 37 38typedef struct xfs_extent { 39 xfs_dfsbno_t ext_start; 40 xfs_extlen_t ext_len; 41} xfs_extent_t; 42 43/* 44 * This is the structure used to lay out an efi log item in the 45 * log. The efi_extents field is a variable size array whose 46 * size is given by efi_nextents. 47 */ 48typedef struct xfs_efi_log_format { 49 unsigned short efi_type; /* efi log item type */ 50 unsigned short efi_size; /* size of this item */ 51 uint efi_nextents; /* # extents to free */ 52 __uint64_t efi_id; /* efi identifier */ 53 xfs_extent_t efi_extents[1]; /* array of extents to free */ 54} xfs_efi_log_format_t; 55 56/* 57 * This is the structure used to lay out an efd log item in the 58 * log. The efd_extents array is a variable size array whose 59 * size is given by efd_nextents; 60 */ 61typedef struct xfs_efd_log_format { 62 unsigned short efd_type; /* efd log item type */ 63 unsigned short efd_size; /* size of this item */ 64 uint efd_nextents; /* # of extents freed */ 65 __uint64_t efd_efi_id; /* id of corresponding efi */ 66 xfs_extent_t efd_extents[1]; /* array of extents freed */ 67} xfs_efd_log_format_t; 68 69 70#ifdef __KERNEL__ 71 72/* 73 * Max number of extents in fast allocation path. 74 */ 75#define XFS_EFI_MAX_FAST_EXTENTS 16 76 77/* 78 * Define EFI flags. 79 */ 80#define XFS_EFI_RECOVERED 0x1 81#define XFS_EFI_COMMITTED 0x2 82#define XFS_EFI_CANCELED 0x4 83 84/* 85 * This is the "extent free intention" log item. It is used 86 * to log the fact that some extents need to be free. It is 87 * used in conjunction with the "extent free done" log item 88 * described below. 89 */ 90typedef struct xfs_efi_log_item { 91 xfs_log_item_t efi_item; 92 uint efi_flags; /* misc flags */ 93 uint efi_next_extent; 94 xfs_efi_log_format_t efi_format; 95} xfs_efi_log_item_t; 96 97/* 98 * This is the "extent free done" log item. It is used to log 99 * the fact that some extents earlier mentioned in an efi item 100 * have been freed. 101 */ 102typedef struct xfs_efd_log_item { 103 xfs_log_item_t efd_item; 104 xfs_efi_log_item_t *efd_efip; 105 uint efd_next_extent; 106 xfs_efd_log_format_t efd_format; 107} xfs_efd_log_item_t; 108 109/* 110 * Max number of extents in fast allocation path. 111 */ 112#define XFS_EFD_MAX_FAST_EXTENTS 16 113 114extern struct kmem_zone *xfs_efi_zone; 115extern struct kmem_zone *xfs_efd_zone; 116 117xfs_efi_log_item_t *xfs_efi_init(struct xfs_mount *, uint); 118xfs_efd_log_item_t *xfs_efd_init(struct xfs_mount *, xfs_efi_log_item_t *, 119 uint); 120 121#endif /* __KERNEL__ */ 122 123#endif /* __XFS_EXTFREE_ITEM_H__ */ 124