[mirror_ubuntu-bionic-kernel.git] / fs / ext4 / extents_status.h

/*
 *  fs/ext4/extents_status.h
 *
 * Written by Yongqiang Yang <xiaoqiangnk@gmail.com>
 * Modified by
 *	Allison Henderson <achender@linux.vnet.ibm.com>
 *	Zheng Liu <wenqing.lz@taobao.com>
 *
 */

#ifndef _EXT4_EXTENTS_STATUS_H
#define _EXT4_EXTENTS_STATUS_H

/*
 * Turn on ES_DEBUG__ to get lots of info about extent status operations.
 */
#ifdef ES_DEBUG__
#define es_debug(fmt, ...)	printk(fmt, ##__VA_ARGS__)
#else
#define es_debug(fmt, ...)	no_printk(fmt, ##__VA_ARGS__)
#endif

/*
 * With ES_AGGRESSIVE_TEST defined, the result of es caching will be
 * checked with old map_block's result.
 */
#define ES_AGGRESSIVE_TEST__

/*
 * These flags live in the high bits of extent_status.es_pblk
 */
#define EXTENT_STATUS_WRITTEN	(1ULL << 63)
#define EXTENT_STATUS_UNWRITTEN (1ULL << 62)
#define EXTENT_STATUS_DELAYED	(1ULL << 61)
#define EXTENT_STATUS_HOLE	(1ULL << 60)

#define EXTENT_STATUS_FLAGS	(EXTENT_STATUS_WRITTEN | \
				 EXTENT_STATUS_UNWRITTEN | \
				 EXTENT_STATUS_DELAYED | \
				 EXTENT_STATUS_HOLE)

struct ext4_sb_info;
struct ext4_extent;

struct extent_status {
	struct rb_node rb_node;
	ext4_lblk_t es_lblk;	/* first logical block extent covers */
	ext4_lblk_t es_len;	/* length of extent in block */
	ext4_fsblk_t es_pblk;	/* first physical block */
};

struct ext4_es_tree {
	struct rb_root root;
	struct extent_status *cache_es;	/* recently accessed extent */
};

extern int __init ext4_init_es(void);
extern void ext4_exit_es(void);
extern void ext4_es_init_tree(struct ext4_es_tree *tree);

extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk,
				 ext4_lblk_t len, ext4_fsblk_t pblk,
				 unsigned long long status);
extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk,
				 ext4_lblk_t len);
extern void ext4_es_find_delayed_extent_range(struct inode *inode,
					ext4_lblk_t lblk, ext4_lblk_t end,
					struct extent_status *es);
extern int ext4_es_lookup_extent(struct inode *inode, ext4_lblk_t lblk,
				 struct extent_status *es);
extern int ext4_es_zeroout(struct inode *inode, struct ext4_extent *ex);

static inline int ext4_es_is_written(struct extent_status *es)
{
	return (es->es_pblk & EXTENT_STATUS_WRITTEN) != 0;
}

static inline int ext4_es_is_unwritten(struct extent_status *es)
{
	return (es->es_pblk & EXTENT_STATUS_UNWRITTEN) != 0;
}

static inline int ext4_es_is_delayed(struct extent_status *es)
{
	return (es->es_pblk & EXTENT_STATUS_DELAYED) != 0;
}

static inline int ext4_es_is_hole(struct extent_status *es)
{
	return (es->es_pblk & EXTENT_STATUS_HOLE) != 0;
}

static inline ext4_fsblk_t ext4_es_status(struct extent_status *es)
{
	return (es->es_pblk & EXTENT_STATUS_FLAGS);
}

static inline ext4_fsblk_t ext4_es_pblock(struct extent_status *es)
{
	return (es->es_pblk & ~EXTENT_STATUS_FLAGS);
}

static inline void ext4_es_store_pblock(struct extent_status *es,
					ext4_fsblk_t pb)
{
	ext4_fsblk_t block;

	block = (pb & ~EXTENT_STATUS_FLAGS) |
		(es->es_pblk & EXTENT_STATUS_FLAGS);
	es->es_pblk = block;
}

static inline void ext4_es_store_status(struct extent_status *es,
					unsigned long long status)
{
	ext4_fsblk_t block;

	block = (status & EXTENT_STATUS_FLAGS) |
		(es->es_pblk & ~EXTENT_STATUS_FLAGS);
	es->es_pblk = block;
}

extern void ext4_es_register_shrinker(struct ext4_sb_info *sbi);
extern void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi);
extern void ext4_es_lru_add(struct inode *inode);
extern void ext4_es_lru_del(struct inode *inode);

#endif /* _EXT4_EXTENTS_STATUS_H */
Commit	Line	Data
c0677e6d ZL	1	/*
	2	* fs/ext4/extents_status.h
	3	*
	4	* Written by Yongqiang Yang <xiaoqiangnk@gmail.com>
	5	* Modified by
	6	* Allison Henderson <achender@linux.vnet.ibm.com>
	7	* Zheng Liu <wenqing.lz@taobao.com>
	8	*
	9	*/
	10
	11	#ifndef _EXT4_EXTENTS_STATUS_H
	12	#define _EXT4_EXTENTS_STATUS_H
	13
654598be ZL	14	/*
	15	* Turn on ES_DEBUG__ to get lots of info about extent status operations.
	16	*/
	17	#ifdef ES_DEBUG__
	18	#define es_debug(fmt, ...) printk(fmt, ##__VA_ARGS__)
	19	#else
	20	#define es_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__)
	21	#endif
	22
921f266b DM	23	/*
	24	* With ES_AGGRESSIVE_TEST defined, the result of es caching will be
	25	* checked with old map_block's result.
	26	*/
	27	#define ES_AGGRESSIVE_TEST__
	28
8e919d13 TT	29	/*
	30	* These flags live in the high bits of extent_status.es_pblk
	31	*/
	32	#define EXTENT_STATUS_WRITTEN (1ULL << 63)
	33	#define EXTENT_STATUS_UNWRITTEN (1ULL << 62)
	34	#define EXTENT_STATUS_DELAYED (1ULL << 61)
	35	#define EXTENT_STATUS_HOLE (1ULL << 60)
fdc0212e ZL	36
	37	#define EXTENT_STATUS_FLAGS (EXTENT_STATUS_WRITTEN \| \
	38	EXTENT_STATUS_UNWRITTEN \| \
	39	EXTENT_STATUS_DELAYED \| \
	40	EXTENT_STATUS_HOLE)
	41
d3922a77	42	struct ext4_sb_info;
adb23551 ZL	43	struct ext4_extent;
adb23551 ZL	44
c0677e6d ZL	45	struct extent_status {
c0677e6d ZL	46	struct rb_node rb_node;
06b0c886 ZL	47	ext4_lblk_t es_lblk; /* first logical block extent covers */
06b0c886 ZL	48	ext4_lblk_t es_len; /* length of extent in block */
fdc0212e	49	ext4_fsblk_t es_pblk; /* first physical block */
c0677e6d ZL	50	};
	51
	52	struct ext4_es_tree {
	53	struct rb_root root;
	54	struct extent_status cache_es; / recently accessed extent */
	55	};
	56
654598be ZL	57	extern int __init ext4_init_es(void);
	58	extern void ext4_exit_es(void);
	59	extern void ext4_es_init_tree(struct ext4_es_tree *tree);
	60
06b0c886	61	extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk,
fdc0212e ZL	62	ext4_lblk_t len, ext4_fsblk_t pblk,
fdc0212e ZL	63	unsigned long long status);
06b0c886	64	extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk,
654598be	65	ext4_lblk_t len);
e30b5dca YZ	66	extern void ext4_es_find_delayed_extent_range(struct inode *inode,
e30b5dca YZ	67	ext4_lblk_t lblk, ext4_lblk_t end,
be401363	68	struct extent_status *es);
d100eef2 ZL	69	extern int ext4_es_lookup_extent(struct inode *inode, ext4_lblk_t lblk,
d100eef2 ZL	70	struct extent_status *es);
adb23551	71	extern int ext4_es_zeroout(struct inode inode, struct ext4_extent ex);
654598be	72
fdc0212e ZL	73	static inline int ext4_es_is_written(struct extent_status *es)
fdc0212e ZL	74	{
8e919d13	75	return (es->es_pblk & EXTENT_STATUS_WRITTEN) != 0;
fdc0212e ZL	76	}
	77
	78	static inline int ext4_es_is_unwritten(struct extent_status *es)
	79	{
8e919d13	80	return (es->es_pblk & EXTENT_STATUS_UNWRITTEN) != 0;
fdc0212e ZL	81	}
	82
	83	static inline int ext4_es_is_delayed(struct extent_status *es)
	84	{
8e919d13	85	return (es->es_pblk & EXTENT_STATUS_DELAYED) != 0;
fdc0212e ZL	86	}
	87
	88	static inline int ext4_es_is_hole(struct extent_status *es)
	89	{
8e919d13	90	return (es->es_pblk & EXTENT_STATUS_HOLE) != 0;
fdc0212e ZL	91	}
	92
	93	static inline ext4_fsblk_t ext4_es_status(struct extent_status *es)
	94	{
	95	return (es->es_pblk & EXTENT_STATUS_FLAGS);
	96	}
	97
	98	static inline ext4_fsblk_t ext4_es_pblock(struct extent_status *es)
	99	{
	100	return (es->es_pblk & ~EXTENT_STATUS_FLAGS);
	101	}
	102
	103	static inline void ext4_es_store_pblock(struct extent_status *es,
	104	ext4_fsblk_t pb)
	105	{
	106	ext4_fsblk_t block;
	107
	108	block = (pb & ~EXTENT_STATUS_FLAGS) \|
	109	(es->es_pblk & EXTENT_STATUS_FLAGS);
	110	es->es_pblk = block;
	111	}
	112
	113	static inline void ext4_es_store_status(struct extent_status *es,
	114	unsigned long long status)
	115	{
	116	ext4_fsblk_t block;
	117
	118	block = (status & EXTENT_STATUS_FLAGS) \|
	119	(es->es_pblk & ~EXTENT_STATUS_FLAGS);
	120	es->es_pblk = block;
	121	}
	122
d3922a77 ZL	123	extern void ext4_es_register_shrinker(struct ext4_sb_info *sbi);
d3922a77 ZL	124	extern void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi);
74cd15cd ZL	125	extern void ext4_es_lru_add(struct inode *inode);
	126	extern void ext4_es_lru_del(struct inode *inode);
	127
c0677e6d	128	#endif /* _EXT4_EXTENTS_STATUS_H */