1#ifndef _UDF_I_H 2#define _UDF_I_H 3 4/* 5 * The i_data_sem and i_mutex serve for protection of allocation information 6 * of a regular files and symlinks. This includes all extents belonging to 7 * the file/symlink, a fact whether data are in-inode or in external data 8 * blocks, preallocation, goal block information... When extents are read, 9 * i_mutex or i_data_sem must be held (for reading is enough in case of 10 * i_data_sem). When extents are changed, i_data_sem must be held for writing 11 * and also i_mutex must be held. 12 * 13 * For directories i_mutex is used for all the necessary protection. 14 */ 15 16struct udf_inode_info { 17 struct timespec i_crtime; 18 /* Physical address of inode */ 19 struct kernel_lb_addr i_location; 20 __u64 i_unique; 21 __u32 i_lenEAttr; 22 __u32 i_lenAlloc; 23 __u64 i_lenExtents; 24 __u32 i_next_alloc_block; 25 __u32 i_next_alloc_goal; 26 unsigned i_alloc_type : 3; 27 unsigned i_efe : 1; /* extendedFileEntry */ 28 unsigned i_use : 1; /* unallocSpaceEntry */ 29 unsigned i_strat4096 : 1; 30 unsigned reserved : 26; 31 union { 32 struct short_ad *i_sad; 33 struct long_ad *i_lad; 34 __u8 *i_data; 35 } i_ext; 36 struct rw_semaphore i_data_sem; 37 struct inode vfs_inode; 38}; 39 40static inline struct udf_inode_info *UDF_I(struct inode *inode) 41{ 42 return list_entry(inode, struct udf_inode_info, vfs_inode); 43} 44 45#endif /* _UDF_I_H) */ 46