Root/fs/udf/udf_i.h

1#ifndef _UDF_I_H
2#define _UDF_I_H
3
4/*
5 * The i_data_sem and i_mutex serve for protection of allocation information
6 * of a regular files and symlinks. This includes all extents belonging to
7 * the file/symlink, a fact whether data are in-inode or in external data
8 * blocks, preallocation, goal block information... When extents are read,
9 * i_mutex or i_data_sem must be held (for reading is enough in case of
10 * i_data_sem). When extents are changed, i_data_sem must be held for writing
11 * and also i_mutex must be held.
12 *
13 * For directories i_mutex is used for all the necessary protection.
14 */
15
16struct udf_inode_info {
17    struct timespec i_crtime;
18    /* Physical address of inode */
19    struct kernel_lb_addr i_location;
20    __u64 i_unique;
21    __u32 i_lenEAttr;
22    __u32 i_lenAlloc;
23    __u64 i_lenExtents;
24    __u32 i_next_alloc_block;
25    __u32 i_next_alloc_goal;
26    unsigned i_alloc_type : 3;
27    unsigned i_efe : 1; /* extendedFileEntry */
28    unsigned i_use : 1; /* unallocSpaceEntry */
29    unsigned i_strat4096 : 1;
30    unsigned reserved : 26;
31    union {
32        struct short_ad *i_sad;
33        struct long_ad *i_lad;
34        __u8 *i_data;
35    } i_ext;
36    struct rw_semaphore i_data_sem;
37    struct inode vfs_inode;
38};
39
40static inline struct udf_inode_info *UDF_I(struct inode *inode)
41{
42    return list_entry(inode, struct udf_inode_info, vfs_inode);
43}
44
45#endif /* _UDF_I_H) */
46

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