ReactOS  0.4.13-dev-645-g69454b4
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 */
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 */
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 
40  ext3_fsblk_t _rsv_start; /* First byte reserved */
41  ext3_fsblk_t _rsv_end; /* Last byte reserved or 0 */
42 };
43 
45  struct rb_node rsv_node;
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
153  struct inode vfs_inode;
154 };
155 
156 #endif /* _LINUX_EXT3_FS_I */
ext3_fsblk_t i_file_acl
Definition: ext3_fs_i.h:85
unsigned char __u8
Definition: compat.h:88
loff_t i_disksize
Definition: ext3_fs_i.h:135
int ext3_grpblk_t
Definition: ext3_fs_i.h:22
struct inode vfs_inode
Definition: ext3_fs_i.h:153
__u32 i_block_group
Definition: ext3_fs_i.h:96
struct ext3_block_alloc_info * i_block_alloc_info
Definition: ext3_fs_i.h:100
unsigned long long ext4_fsblk_t
Definition: ext3_fs_i.h:27
Definition: fs.h:78
Definition: list.h:15
ext3_fsblk_t _rsv_start
Definition: ext3_fs_i.h:40
__u32 i_dir_start_lookup
Definition: ext3_fs_i.h:102
__u32 i_dir_acl
Definition: ext3_fs_i.h:86
int ext4_grpblk_t
Definition: ext3_fs_i.h:23
unsigned short __u16
Definition: compat.h:89
struct ext3_reserve_window_node rsv_window_node
Definition: ext3_fs_i.h:53
ext3_fsblk_t _rsv_end
Definition: ext3_fs_i.h:41
unsigned int __u32
Definition: compat.h:90
struct ext3_reserve_window rsv_window
Definition: ext3_fs_i.h:48
__u32 ext4_lblk_t
Definition: ext3_fs_i.h:31
unsigned __int64 loff_t
Definition: types.h:80
unsigned int ext3_group_t
Definition: ext3_fs_i.h:34
struct list_head i_orphan
Definition: ext3_fs_i.h:118
__u32 ext3_lblk_t
Definition: ext3_fs_i.h:30
ext3_fsblk_t last_alloc_physical_block
Definition: ext3_fs_i.h:68
unsigned int ext4_group_t
Definition: ext3_fs_i.h:35
struct rb_node rsv_node
Definition: ext3_fs_i.h:45
__u16 i_extra_isize
Definition: ext3_fs_i.h:138
Definition: rbtree.h:97
unsigned long long ext3_fsblk_t
Definition: ext3_fs_i.h:26
Definition: module.h:446
__u32 last_alloc_logical_block
Definition: ext3_fs_i.h:60
#define __le32
Definition: types.h:40
__le32 i_data[15]
Definition: ext3_fs_i.h:78