1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _UDF_I_H
3 #define _UDF_I_H
4
5 struct extent_position {
6 struct buffer_head *bh;
7 uint32_t offset;
8 struct kernel_lb_addr block;
9 };
10
11 struct udf_ext_cache {
12 /* Extent position */
13 struct extent_position epos;
14 /* Start logical offset in bytes */
15 loff_t lstart;
16 };
17
18 /*
19 * The i_data_sem and i_mutex serve for protection of allocation information
20 * of a regular files and symlinks. This includes all extents belonging to
21 * the file/symlink, a fact whether data are in-inode or in external data
22 * blocks, preallocation, goal block information... When extents are read,
23 * i_mutex or i_data_sem must be held (for reading is enough in case of
24 * i_data_sem). When extents are changed, i_data_sem must be held for writing
25 * and also i_mutex must be held.
26 *
27 * For directories i_mutex is used for all the necessary protection.
28 */
29
30 struct udf_inode_info {
31 struct timespec64 i_crtime;
32 /* Physical address of inode */
33 struct kernel_lb_addr i_location;
34 __u64 i_unique;
35 __u32 i_lenEAttr;
36 __u32 i_lenAlloc;
37 __u64 i_lenExtents;
38 __u32 i_next_alloc_block;
39 __u32 i_next_alloc_goal;
40 __u32 i_checkpoint;
41 __u32 i_extraPerms;
42 unsigned i_alloc_type : 3;
43 unsigned i_efe : 1; /* extendedFileEntry */
44 unsigned i_use : 1; /* unallocSpaceEntry */
45 unsigned i_strat4096 : 1;
46 unsigned i_streamdir : 1;
47 unsigned reserved : 25;
48 union {
49 struct short_ad *i_sad;
50 struct long_ad *i_lad;
51 __u8 *i_data;
52 } i_ext;
53 struct kernel_lb_addr i_locStreamdir;
54 __u64 i_lenStreams;
55 struct rw_semaphore i_data_sem;
56 struct udf_ext_cache cached_extent;
57 /* Spinlock for protecting extent cache */
58 spinlock_t i_extent_cache_lock;
59 struct inode vfs_inode;
60 };
61
62 static inline struct udf_inode_info *UDF_I(struct inode *inode)
63 {
64 return container_of(inode, struct udf_inode_info, vfs_inode);
65 }
66
67 #endif /* _UDF_I_H) */