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 ; |
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 i_hidden : 1; /* hidden system inode */ |
48 | unsigned reserved : 24; |
49 | __u8 *i_data; |
50 | struct kernel_lb_addr i_locStreamdir; |
51 | __u64 i_lenStreams; |
52 | struct rw_semaphore i_data_sem; |
53 | struct udf_ext_cache cached_extent; |
54 | /* Spinlock for protecting extent cache */ |
55 | spinlock_t i_extent_cache_lock; |
56 | struct inode vfs_inode; |
57 | }; |
58 | |
59 | static inline struct udf_inode_info *UDF_I(struct inode *inode) |
60 | { |
61 | return container_of(inode, struct udf_inode_info, vfs_inode); |
62 | } |
63 | |
64 | #endif /* _UDF_I_H) */ |
65 | |