1#ifndef _UDF_I_H 2#define _UDF_I_H 3 4struct 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 17/* 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 29struct udf_inode_info { 30 struct timespec i_crtime; 31 /* Physical address of inode */ 32 struct kernel_lb_addr i_location; 33 __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; 39 __u32 i_checkpoint; 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; 45 union { 46 struct short_ad *i_sad; 47 struct long_ad *i_lad; 48 __u8 *i_data; 49 } i_ext; 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; 55}; 56 57static inline struct udf_inode_info *UDF_I(struct inode *inode) 58{ 59 return container_of(inode, struct udf_inode_info, vfs_inode); 60} 61 62#endif /* _UDF_I_H) */ 63