blob: b5cd8ed2aa12ff3e27a8b3681886152943bf3af4 [file] [log] [blame]
Christoph Hellwig15aebd22008-02-22 12:39:12 +01001#ifndef _UDF_I_H
2#define _UDF_I_H
Linus Torvalds1da177e2005-04-16 15:20:36 -07003
Namjae Jeon99600052013-01-19 11:17:14 +09004struct extent_position {
5 struct buffer_head *bh;
6 uint32_t offset;
7 struct kernel_lb_addr block;
8};
9
10struct udf_ext_cache {
11 /* Extent position */
12 struct extent_position epos;
13 /* Start logical offset in bytes */
14 loff_t lstart;
15};
16
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +010017/*
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.
25 *
26 * For directories i_mutex is used for all the necessary protection.
27 */
28
Christoph Hellwig15aebd22008-02-22 12:39:12 +010029struct udf_inode_info {
30 struct timespec i_crtime;
31 /* Physical address of inode */
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020032 struct kernel_lb_addr i_location;
Christoph Hellwig15aebd22008-02-22 12:39:12 +010033 __u64 i_unique;
34 __u32 i_lenEAttr;
35 __u32 i_lenAlloc;
36 __u64 i_lenExtents;
37 __u32 i_next_alloc_block;
38 __u32 i_next_alloc_goal;
Steve Nickeld5e2cf02012-02-14 00:28:42 -050039 __u32 i_checkpoint;
Christoph Hellwig15aebd22008-02-22 12:39:12 +010040 unsigned i_alloc_type : 3;
marcin.slusarz@gmail.comd652eef2008-01-30 22:03:59 +010041 unsigned i_efe : 1; /* extendedFileEntry */
42 unsigned i_use : 1; /* unallocSpaceEntry */
Christoph Hellwig15aebd22008-02-22 12:39:12 +010043 unsigned i_strat4096 : 1;
44 unsigned reserved : 26;
45 union {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020046 struct short_ad *i_sad;
47 struct long_ad *i_lad;
Christoph Hellwig15aebd22008-02-22 12:39:12 +010048 __u8 *i_data;
49 } i_ext;
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +010050 struct rw_semaphore i_data_sem;
Namjae Jeon99600052013-01-19 11:17:14 +090051 struct udf_ext_cache cached_extent;
52 /* Spinlock for protecting extent cache */
53 spinlock_t i_extent_cache_lock;
Christoph Hellwig15aebd22008-02-22 12:39:12 +010054 struct inode vfs_inode;
55};
56
Linus Torvalds1da177e2005-04-16 15:20:36 -070057static inline struct udf_inode_info *UDF_I(struct inode *inode)
58{
59 return list_entry(inode, struct udf_inode_info, vfs_inode);
60}
61
Christoph Hellwig15aebd22008-02-22 12:39:12 +010062#endif /* _UDF_I_H) */