ReactOS 0.4.15-dev-5893-g1bb4167
ext3_fs_i.h
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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 */
22typedef int ext3_grpblk_t;
23typedef int ext4_grpblk_t;
24
25/* data type for filesystem-wide blocks number */
26typedef unsigned long long ext3_fsblk_t;
27typedef unsigned long long ext4_fsblk_t;
28
29/* data type for file logical block number */
32
33/* data type for block group number */
34typedef unsigned int ext3_group_t;
35typedef unsigned int ext4_group_t;
36
37#define E3FSBLK "%lu"
38
40 ext3_fsblk_t _rsv_start; /* First byte reserved */
41 ext3_fsblk_t _rsv_end; /* Last byte reserved or 0 */
42};
43
49};
50
52 /* information about reservation window */
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 */
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 */
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 */
78 __le32 i_data[15]; /* unconverted */
80#ifdef EXT3_FRAGMENTS
81 __u32 i_faddr;
82 __u8 i_frag_no;
83 __u8 i_frag_size;
84#endif
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 */
97 __u32 i_state; /* Dynamic state flags for ext3 */
98
99 /* block reservation info */
101
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 */
136
137 /* on-disk additional length */
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
154};
155
156#endif /* _LINUX_EXT3_FS_I */
u16 __u16
Definition: btrfs.h:18
u8 __u8
Definition: btrfs.h:17
u32 __u32
Definition: btrfs.h:19
#define __le32
Definition: types.h:40
unsigned __int64 loff_t
Definition: types.h:80
__u32 ext4_lblk_t
Definition: ext3_fs_i.h:31
unsigned long long ext4_fsblk_t
Definition: ext3_fs_i.h:27
unsigned int ext3_group_t
Definition: ext3_fs_i.h:34
int ext3_grpblk_t
Definition: ext3_fs_i.h:22
int ext4_grpblk_t
Definition: ext3_fs_i.h:23
unsigned long long ext3_fsblk_t
Definition: ext3_fs_i.h:26
unsigned int ext4_group_t
Definition: ext3_fs_i.h:35
__u32 ext3_lblk_t
Definition: ext3_fs_i.h:30
struct ext3_reserve_window_node rsv_window_node
Definition: ext3_fs_i.h:53
__u32 last_alloc_logical_block
Definition: ext3_fs_i.h:60
ext3_fsblk_t last_alloc_physical_block
Definition: ext3_fs_i.h:68
__u32 i_dir_acl
Definition: ext3_fs_i.h:86
__u32 i_block_group
Definition: ext3_fs_i.h:96
__u32 i_dir_start_lookup
Definition: ext3_fs_i.h:102
struct ext3_block_alloc_info * i_block_alloc_info
Definition: ext3_fs_i.h:100
struct inode vfs_inode
Definition: ext3_fs_i.h:153
loff_t i_disksize
Definition: ext3_fs_i.h:135
__u16 i_extra_isize
Definition: ext3_fs_i.h:138
__le32 i_data[15]
Definition: ext3_fs_i.h:78
ext3_fsblk_t i_file_acl
Definition: ext3_fs_i.h:85
struct list_head i_orphan
Definition: ext3_fs_i.h:118
struct ext3_reserve_window rsv_window
Definition: ext3_fs_i.h:48
struct rb_node rsv_node
Definition: ext3_fs_i.h:45
ext3_fsblk_t _rsv_start
Definition: ext3_fs_i.h:40
ext3_fsblk_t _rsv_end
Definition: ext3_fs_i.h:41
Definition: fs.h:78
Definition: list.h:15
Definition: module.h:446
Definition: rbtree.h:98