diff options
Diffstat (limited to 'fs/udf/udf_i.h')
| -rw-r--r-- | fs/udf/udf_i.h | 36 |
1 files changed, 33 insertions, 3 deletions
diff --git a/fs/udf/udf_i.h b/fs/udf/udf_i.h index 4f86b1d98a5..b5cd8ed2aa1 100644 --- a/fs/udf/udf_i.h +++ b/fs/udf/udf_i.h @@ -1,26 +1,56 @@ #ifndef _UDF_I_H #define _UDF_I_H +struct extent_position { + struct buffer_head *bh; + uint32_t offset; + struct kernel_lb_addr block; +}; + +struct udf_ext_cache { + /* Extent position */ + struct extent_position epos; + /* Start logical offset in bytes */ + loff_t lstart; +}; + +/* + * The i_data_sem and i_mutex serve for protection of allocation information + * of a regular files and symlinks. This includes all extents belonging to + * the file/symlink, a fact whether data are in-inode or in external data + * blocks, preallocation, goal block information... When extents are read, + * i_mutex or i_data_sem must be held (for reading is enough in case of + * i_data_sem). When extents are changed, i_data_sem must be held for writing + * and also i_mutex must be held. + * + * For directories i_mutex is used for all the necessary protection. + */ + struct udf_inode_info { struct timespec i_crtime; /* Physical address of inode */ - kernel_lb_addr i_location; + struct kernel_lb_addr i_location; __u64 i_unique; __u32 i_lenEAttr; __u32 i_lenAlloc; __u64 i_lenExtents; __u32 i_next_alloc_block; __u32 i_next_alloc_goal; + __u32 i_checkpoint; unsigned i_alloc_type : 3; unsigned i_efe : 1; /* extendedFileEntry */ unsigned i_use : 1; /* unallocSpaceEntry */ unsigned i_strat4096 : 1; unsigned reserved : 26; union { - short_ad *i_sad; - long_ad *i_lad; + struct short_ad *i_sad; + struct long_ad *i_lad; __u8 *i_data; } i_ext; + struct rw_semaphore i_data_sem; + struct udf_ext_cache cached_extent; + /* Spinlock for protecting extent cache */ + spinlock_t i_extent_cache_lock; struct inode vfs_inode; }; |