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) */ 68