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Examples
ext3_fs_i.h
Go to the documentation of this file.
1
/*
2
* linux/include/linux/ext3_fs_i.h
3
*
4
* Copyright (C) 1992, 1993, 1994, 1995
5
* Remy Card (card@masi.ibp.fr)
6
* Laboratoire MASI - Institut Blaise Pascal
7
* Universite Pierre et Marie Curie (Paris VI)
8
*
9
* from
10
*
11
* linux/include/linux/minix_fs_i.h
12
*
13
* Copyright (C) 1991, 1992 Linus Torvalds
14
*/
15
16
#ifndef _LINUX_EXT3_FS_I
17
#define _LINUX_EXT3_FS_I
18
19
#include <
linux/rbtree.h
>
20
21
/* data type for block offset of block group */
22
typedef
int
ext3_grpblk_t
;
23
typedef
int
ext4_grpblk_t
;
24
25
/* data type for filesystem-wide blocks number */
26
typedef
unsigned
long
long
ext3_fsblk_t
;
27
typedef
unsigned
long
long
ext4_fsblk_t
;
28
29
/* data type for file logical block number */
30
typedef
__u32
ext3_lblk_t
;
31
typedef
__u32
ext4_lblk_t
;
32
33
/* data type for block group number */
34
typedef
unsigned
int
ext3_group_t
;
35
typedef
unsigned
int
ext4_group_t
;
36
37
#define E3FSBLK "%lu"
38
39
struct
ext3_reserve_window
{
40
ext3_fsblk_t
_rsv_start
;
/* First byte reserved */
41
ext3_fsblk_t
_rsv_end
;
/* Last byte reserved or 0 */
42
};
43
44
struct
ext3_reserve_window_node
{
45
struct
rb_node
rsv_node
;
46
__u32
rsv_goal_size
;
47
__u32
rsv_alloc_hit
;
48
struct
ext3_reserve_window
rsv_window
;
49
};
50
51
struct
ext3_block_alloc_info
{
52
/* information about reservation window */
53
struct
ext3_reserve_window_node
rsv_window_node
;
54
/*
55
* was i_next_alloc_block in ext3_inode_info
56
* is the logical (file-relative) number of the
57
* most-recently-allocated block in this file.
58
* We use this for detecting linearly ascending allocation requests.
59
*/
60
__u32
last_alloc_logical_block
;
61
/*
62
* Was i_next_alloc_goal in ext3_inode_info
63
* is the *physical* companion to i_next_alloc_block.
64
* it the physical block number of the block which was most-recentl
65
* allocated to this file. This give us the goal (target) for the next
66
* allocation when we detect linearly ascending requests.
67
*/
68
ext3_fsblk_t
last_alloc_physical_block
;
69
};
70
71
#define rsv_start rsv_window._rsv_start
72
#define rsv_end rsv_window._rsv_end
73
74
/*
75
* third extended file system inode data in memory
76
*/
77
struct
ext3_inode_info
{
78
__le32
i_data
[15];
/* unconverted */
79
__u32
i_flags
;
80
#ifdef EXT3_FRAGMENTS
81
__u32
i_faddr;
82
__u8
i_frag_no;
83
__u8
i_frag_size;
84
#endif
85
ext3_fsblk_t
i_file_acl
;
86
__u32
i_dir_acl
;
87
__u32
i_dtime
;
88
89
/*
90
* i_block_group is the number of the block group which contains
91
* this file's inode. Constant across the lifetime of the inode,
92
* it is ued for making block allocation decisions - we try to
93
* place a file's data blocks near its inode block, and new inodes
94
* near to their parent directory's inode.
95
*/
96
__u32
i_block_group
;
97
__u32
i_state
;
/* Dynamic state flags for ext3 */
98
99
/* block reservation info */
100
struct
ext3_block_alloc_info
*
i_block_alloc_info
;
101
102
__u32
i_dir_start_lookup
;
103
#ifdef CONFIG_EXT3_FS_XATTR
104
/*
105
* Extended attributes can be read independently of the main file
106
* data. Taking i_mutex even when reading would cause contention
107
* between readers of EAs and writers of regular file data, so
108
* instead we synchronize on xattr_sem when reading or changing
109
* EAs.
110
*/
111
struct
rw_semaphore xattr_sem;
112
#endif
113
#ifdef CONFIG_EXT3_FS_POSIX_ACL
114
struct
posix_acl *i_acl;
115
struct
posix_acl *i_default_acl;
116
#endif
117
118
struct
list_head
i_orphan
;
/* unlinked but open inodes */
119
120
/*
121
* i_disksize keeps track of what the inode size is ON DISK, not
122
* in memory. During truncate, i_size is set to the new size by
123
* the VFS prior to calling ext3_truncate(), but the filesystem won't
124
* set i_disksize to 0 until the truncate is actually under way.
125
*
126
* The intent is that i_disksize always represents the blocks which
127
* are used by this file. This allows recovery to restart truncate
128
* on orphans if we crash during truncate. We actually write i_disksize
129
* into the on-disk inode when writing inodes out, instead of i_size.
130
*
131
* The only time when i_disksize and i_size may be different is when
132
* a truncate is in progress. The only things which change i_disksize
133
* are ext3_get_block (growth) and ext3_truncate (shrinkth).
134
*/
135
loff_t
i_disksize
;
136
137
/* on-disk additional length */
138
__u16
i_extra_isize
;
139
140
#if 0
141
/*
142
* truncate_mutex is for serialising ext3_truncate() against
143
* ext3_getblock(). In the 2.4 ext2 design, great chunks of inode's
144
* data tree are chopped off during truncate. We can't do that in
145
* ext3 because whenever we perform intermediate commits during
146
* truncate, the inode and all the metadata blocks *must* be in a
147
* consistent state which allows truncation of the orphans to restart
148
* during recovery. Hence we must fix the get_block-vs-truncate race
149
* by other means, so we have truncate_mutex.
150
*/
151
struct
mutex
truncate_mutex;
152
#endif
153
struct
inode
vfs_inode
;
154
};
155
156
#endif
/* _LINUX_EXT3_FS_I */
__u16
u16 __u16
Definition:
btrfs.h:18
__u8
u8 __u8
Definition:
btrfs.h:17
__u32
u32 __u32
Definition:
btrfs.h:19
rbtree.h
__le32
#define __le32
Definition:
types.h:44
loff_t
unsigned __int64 loff_t
Definition:
types.h:84
ext4_lblk_t
__u32 ext4_lblk_t
Definition:
ext3_fs_i.h:31
ext4_fsblk_t
unsigned long long ext4_fsblk_t
Definition:
ext3_fs_i.h:27
ext3_group_t
unsigned int ext3_group_t
Definition:
ext3_fs_i.h:34
ext3_grpblk_t
int ext3_grpblk_t
Definition:
ext3_fs_i.h:22
ext4_grpblk_t
int ext4_grpblk_t
Definition:
ext3_fs_i.h:23
ext3_fsblk_t
unsigned long long ext3_fsblk_t
Definition:
ext3_fs_i.h:26
ext4_group_t
unsigned int ext4_group_t
Definition:
ext3_fs_i.h:35
ext3_lblk_t
__u32 ext3_lblk_t
Definition:
ext3_fs_i.h:30
ext3_block_alloc_info
Definition:
ext3_fs_i.h:51
ext3_block_alloc_info::rsv_window_node
struct ext3_reserve_window_node rsv_window_node
Definition:
ext3_fs_i.h:53
ext3_block_alloc_info::last_alloc_logical_block
__u32 last_alloc_logical_block
Definition:
ext3_fs_i.h:60
ext3_block_alloc_info::last_alloc_physical_block
ext3_fsblk_t last_alloc_physical_block
Definition:
ext3_fs_i.h:68
ext3_inode_info
Definition:
ext3_fs_i.h:77
ext3_inode_info::i_dir_acl
__u32 i_dir_acl
Definition:
ext3_fs_i.h:86
ext3_inode_info::i_flags
__u32 i_flags
Definition:
ext3_fs_i.h:79
ext3_inode_info::i_block_group
__u32 i_block_group
Definition:
ext3_fs_i.h:96
ext3_inode_info::i_state
__u32 i_state
Definition:
ext3_fs_i.h:97
ext3_inode_info::i_dir_start_lookup
__u32 i_dir_start_lookup
Definition:
ext3_fs_i.h:102
ext3_inode_info::i_block_alloc_info
struct ext3_block_alloc_info * i_block_alloc_info
Definition:
ext3_fs_i.h:100
ext3_inode_info::vfs_inode
struct inode vfs_inode
Definition:
ext3_fs_i.h:153
ext3_inode_info::i_disksize
loff_t i_disksize
Definition:
ext3_fs_i.h:135
ext3_inode_info::i_extra_isize
__u16 i_extra_isize
Definition:
ext3_fs_i.h:138
ext3_inode_info::i_data
__le32 i_data[15]
Definition:
ext3_fs_i.h:78
ext3_inode_info::i_file_acl
ext3_fsblk_t i_file_acl
Definition:
ext3_fs_i.h:85
ext3_inode_info::i_dtime
__u32 i_dtime
Definition:
ext3_fs_i.h:87
ext3_inode_info::i_orphan
struct list_head i_orphan
Definition:
ext3_fs_i.h:118
ext3_reserve_window_node
Definition:
ext3_fs_i.h:44
ext3_reserve_window_node::rsv_window
struct ext3_reserve_window rsv_window
Definition:
ext3_fs_i.h:48
ext3_reserve_window_node::rsv_goal_size
__u32 rsv_goal_size
Definition:
ext3_fs_i.h:46
ext3_reserve_window_node::rsv_node
struct rb_node rsv_node
Definition:
ext3_fs_i.h:45
ext3_reserve_window_node::rsv_alloc_hit
__u32 rsv_alloc_hit
Definition:
ext3_fs_i.h:47
ext3_reserve_window
Definition:
ext3_fs_i.h:39
ext3_reserve_window::_rsv_start
ext3_fsblk_t _rsv_start
Definition:
ext3_fs_i.h:40
ext3_reserve_window::_rsv_end
ext3_fsblk_t _rsv_end
Definition:
ext3_fs_i.h:41
inode
Definition:
fs.h:78
list_head
Definition:
list.h:15
mutex
Definition:
module.h:456
rb_node
Definition:
rbtree.h:98
drivers
filesystems
ext2
inc
linux
ext3_fs_i.h
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