[deliverable/linux.git] / fs / udf / udf_i.h

#ifndef _UDF_I_H
#define _UDF_I_H

/*
 * 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;
	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 inode vfs_inode;
};

static inline struct udf_inode_info *UDF_I(struct inode *inode)
{
	return list_entry(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
4d0fb621 AIB	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
15aebd28 CH	16	struct udf_inode_info {
	17	struct timespec i_crtime;
	18	/* Physical address of inode */
5ca4e4be	19	struct kernel_lb_addr i_location;
15aebd28 CH	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;
d652eefb	27	unsigned i_efe : 1; /* extendedFileEntry */
d652eefb	28	unsigned i_use : 1; /* unallocSpaceEntry */
15aebd28 CH	29	unsigned i_strat4096 : 1;
	30	unsigned reserved : 26;
	31	union {
5ca4e4be PE	32	struct short_ad *i_sad;
5ca4e4be PE	33	struct long_ad *i_lad;
15aebd28 CH	34	__u8 *i_data;
15aebd28 CH	35	} i_ext;
4d0fb621	36	struct rw_semaphore i_data_sem;
15aebd28 CH	37	struct inode vfs_inode;
15aebd28 CH	38	};
1da177e4	39
1da177e4 LT	40	static inline struct udf_inode_info UDF_I(struct inode inode)
	41	{
	42	return list_entry(inode, struct udf_inode_info, vfs_inode);
	43	}
	44
15aebd28	45	#endif /* _UDF_I_H) */