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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
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 { | |
128dabc5 TS |
37 | __uint64_t ext_start; |
38 | __uint32_t ext_len; | |
6d192a9b TS |
39 | } __attribute__((packed)) xfs_extent_32_t; |
40 | ||
41 | typedef struct xfs_extent_64 { | |
128dabc5 TS |
42 | __uint64_t ext_start; |
43 | __uint32_t ext_len; | |
6d192a9b TS |
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 { | |
128dabc5 TS |
53 | __uint16_t efi_type; /* efi log item type */ |
54 | __uint16_t efi_size; /* size of this item */ | |
55 | __uint32_t efi_nextents; /* # extents to free */ | |
1da177e4 LT |
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 | 60 | typedef struct xfs_efi_log_format_32 { |
128dabc5 TS |
61 | __uint16_t efi_type; /* efi log item type */ |
62 | __uint16_t efi_size; /* size of this item */ | |
63 | __uint32_t efi_nextents; /* # extents to free */ | |
6d192a9b TS |
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 { | |
128dabc5 TS |
69 | __uint16_t efi_type; /* efi log item type */ |
70 | __uint16_t efi_size; /* size of this item */ | |
71 | __uint32_t efi_nextents; /* # extents to free */ | |
6d192a9b TS |
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 { | |
128dabc5 TS |
82 | __uint16_t efd_type; /* efd log item type */ |
83 | __uint16_t efd_size; /* size of this item */ | |
84 | __uint32_t efd_nextents; /* # of extents freed */ | |
1da177e4 LT |
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 | 89 | typedef struct xfs_efd_log_format_32 { |
128dabc5 TS |
90 | __uint16_t efd_type; /* efd log item type */ |
91 | __uint16_t efd_size; /* size of this item */ | |
92 | __uint32_t efd_nextents; /* # of extents freed */ | |
6d192a9b TS |
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 { | |
128dabc5 TS |
98 | __uint16_t efd_type; /* efd log item type */ |
99 | __uint16_t efd_size; /* size of this item */ | |
100 | __uint32_t efd_nextents; /* # of extents freed */ | |
6d192a9b TS |
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, |
157 | xfs_efi_log_format_t *dst_efi_fmt); | |
7d795ca3 CH |
158 | void xfs_efi_item_free(xfs_efi_log_item_t *); |
159 | ||
1da177e4 LT |
160 | #endif /* __KERNEL__ */ |
161 | ||
162 | #endif /* __XFS_EXTFREE_ITEM_H__ */ |