4 struct extent_position {
5 struct buffer_head *bh;
7 struct kernel_lb_addr block;
10 struct udf_ext_cache {
12 struct extent_position epos;
13 /* Start logical offset in bytes */
18 * The i_data_sem and i_mutex serve for protection of allocation information
19 * of a regular files and symlinks. This includes all extents belonging to
20 * the file/symlink, a fact whether data are in-inode or in external data
21 * blocks, preallocation, goal block information... When extents are read,
22 * i_mutex or i_data_sem must be held (for reading is enough in case of
23 * i_data_sem). When extents are changed, i_data_sem must be held for writing
24 * and also i_mutex must be held.
26 * For directories i_mutex is used for all the necessary protection.
29 struct udf_inode_info {
30 struct timespec i_crtime;
31 /* Physical address of inode */
32 struct kernel_lb_addr i_location;
37 __u32 i_next_alloc_block;
38 __u32 i_next_alloc_goal;
40 unsigned i_alloc_type : 3;
41 unsigned i_efe : 1; /* extendedFileEntry */
42 unsigned i_use : 1; /* unallocSpaceEntry */
43 unsigned i_strat4096 : 1;
44 unsigned reserved : 26;
46 struct short_ad *i_sad;
47 struct long_ad *i_lad;
50 struct rw_semaphore i_data_sem;
51 struct udf_ext_cache cached_extent;
52 /* Spinlock for protecting extent cache */
53 spinlock_t i_extent_cache_lock;
54 struct inode vfs_inode;
57 static inline struct udf_inode_info *UDF_I(struct inode *inode)
59 return list_entry(inode, struct udf_inode_info, vfs_inode);
62 #endif /* _UDF_I_H) */