[linux-2.6-block.git] / fs / udf / udf_i.h

/* SPDX-License-Identifier: GPL-2.0 */
#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 timespec64	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
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
15aebd28 CH	2	#ifndef _UDF_I_H
	3	#define _UDF_I_H
	4
99600051 NJ	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
4d0fb621 AIB	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
15aebd28	30	struct udf_inode_info {
c3b9cecd	31	struct timespec64 i_crtime;
15aebd28	32	/* Physical address of inode */
5ca4e4be	33	struct kernel_lb_addr i_location;
15aebd28 CH	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;
d5e2cf07	40	__u32 i_checkpoint;
15aebd28	41	unsigned i_alloc_type : 3;
d652eefb	42	unsigned i_efe : 1; /* extendedFileEntry */
d652eefb	43	unsigned i_use : 1; /* unallocSpaceEntry */
15aebd28 CH	44	unsigned i_strat4096 : 1;
	45	unsigned reserved : 26;
	46	union {
5ca4e4be PE	47	struct short_ad *i_sad;
5ca4e4be PE	48	struct long_ad *i_lad;
15aebd28 CH	49	__u8 *i_data;
15aebd28 CH	50	} i_ext;
4d0fb621	51	struct rw_semaphore i_data_sem;
99600051 NJ	52	struct udf_ext_cache cached_extent;
	53	/* Spinlock for protecting extent cache */
	54	spinlock_t i_extent_cache_lock;
15aebd28 CH	55	struct inode vfs_inode;
15aebd28 CH	56	};
1da177e4	57
1da177e4 LT	58	static inline struct udf_inode_info UDF_I(struct inode inode)
1da177e4 LT	59	{
db6172c4	60	return container_of(inode, struct udf_inode_info, vfs_inode);
1da177e4 LT	61	}
1da177e4 LT	62
15aebd28	63	#endif /* _UDF_I_H) */