[mirror_ubuntu-artful-kernel.git] / fs / udf / udf_i.h

#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 */
	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 {
		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;
};

static inline struct udf_inode_info *UDF_I(struct inode *inode)
{
	return container_of(inode, struct udf_inode_info, vfs_inode);
}

#endif /* _UDF_I_H) */
Commit	Line	Data
15aebd28 CH	1	#ifndef _UDF_I_H
	2	#define _UDF_I_H
	3
99600051 NJ	4	struct extent_position {
	5	struct buffer_head *bh;
	6	uint32_t offset;
	7	struct kernel_lb_addr block;
	8	};
	9
	10	struct udf_ext_cache {
	11	/* Extent position */
	12	struct extent_position epos;
	13	/* Start logical offset in bytes */
	14	loff_t lstart;
	15	};
	16
4d0fb621 AIB	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
15aebd28 CH	29	struct udf_inode_info {
	30	struct timespec i_crtime;
	31	/* Physical address of inode */
5ca4e4be	32	struct kernel_lb_addr i_location;
15aebd28 CH	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;
d5e2cf07	39	__u32 i_checkpoint;
15aebd28	40	unsigned i_alloc_type : 3;
d652eefb	41	unsigned i_efe : 1; /* extendedFileEntry */
d652eefb	42	unsigned i_use : 1; /* unallocSpaceEntry */
15aebd28 CH	43	unsigned i_strat4096 : 1;
	44	unsigned reserved : 26;
	45	union {
5ca4e4be PE	46	struct short_ad *i_sad;
5ca4e4be PE	47	struct long_ad *i_lad;
15aebd28 CH	48	__u8 *i_data;
15aebd28 CH	49	} i_ext;
4d0fb621	50	struct rw_semaphore i_data_sem;
99600051 NJ	51	struct udf_ext_cache cached_extent;
	52	/* Spinlock for protecting extent cache */
	53	spinlock_t i_extent_cache_lock;
15aebd28 CH	54	struct inode vfs_inode;
15aebd28 CH	55	};
1da177e4	56
1da177e4 LT	57	static inline struct udf_inode_info UDF_I(struct inode inode)
1da177e4 LT	58	{
db6172c4	59	return container_of(inode, struct udf_inode_info, vfs_inode);
1da177e4 LT	60	}
1da177e4 LT	61
15aebd28	62	#endif /* _UDF_I_H) */