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1da177e4 LT |
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 | ||
35 | struct xfs_mount; | |
36 | struct kmem_zone; | |
37 | ||
38 | typedef 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 | */ | |
48 | typedef 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 | */ | |
61 | typedef 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 | */ | |
90 | typedef 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 | */ | |
102 | typedef 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 | ||
114 | extern struct kmem_zone *xfs_efi_zone; | |
115 | extern struct kmem_zone *xfs_efd_zone; | |
116 | ||
117 | xfs_efi_log_item_t *xfs_efi_init(struct xfs_mount *, uint); | |
118 | xfs_efd_log_item_t *xfs_efd_init(struct xfs_mount *, xfs_efi_log_item_t *, | |
119 | uint); | |
120 | ||
7d795ca3 CH |
121 | void xfs_efi_item_free(xfs_efi_log_item_t *); |
122 | ||
1da177e4 LT |
123 | #endif /* __KERNEL__ */ |
124 | ||
125 | #endif /* __XFS_EXTFREE_ITEM_H__ */ |