[thirdparty/u-boot.git] / fs / btrfs / extent-io.h

// SPDX-License-Identifier: GPL-2.0+

/*
 * Crossported from btrfs-progs/extent_io.h
 *
 * Modification includes:
 * - extent_buffer:data
 *   Use pointer to provide better alignment.
 * - Remove max_cache_size related interfaces
 *   Includes free_extent_buffer_nocache()
 *   As we don't cache eb in U-Boot.
 * - Include headers
 *
 * Write related functions are kept as we still need to modify dummy extent
 * buffers even in RO environment.
 */
#ifndef __BTRFS_EXTENT_IO_H__
#define __BTRFS_EXTENT_IO_H__

#include <linux/types.h>
#include <linux/list.h>
#include <linux/err.h>
#include <linux/bitops.h>
#include <fs_internal.h>
#include "extent-cache.h"

#define EXTENT_DIRTY		(1U << 0)
#define EXTENT_WRITEBACK	(1U << 1)
#define EXTENT_UPTODATE		(1U << 2)
#define EXTENT_LOCKED		(1U << 3)
#define EXTENT_NEW		(1U << 4)
#define EXTENT_DELALLOC		(1U << 5)
#define EXTENT_DEFRAG		(1U << 6)
#define EXTENT_DEFRAG_DONE	(1U << 7)
#define EXTENT_BUFFER_FILLED	(1U << 8)
#define EXTENT_CSUM		(1U << 9)
#define EXTENT_BAD_TRANSID	(1U << 10)
#define EXTENT_BUFFER_DUMMY	(1U << 11)
#define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)

#define BLOCK_GROUP_DATA	(1U << 1)
#define BLOCK_GROUP_METADATA	(1U << 2)
#define BLOCK_GROUP_SYSTEM	(1U << 4)

/*
 * The extent buffer bitmap operations are done with byte granularity instead of
 * word granularity for two reasons:
 * 1. The bitmaps must be little-endian on disk.
 * 2. Bitmap items are not guaranteed to be aligned to a word and therefore a
 *    single word in a bitmap may straddle two pages in the extent buffer.
 */
#define BIT_BYTE(nr) ((nr) / BITS_PER_BYTE)
#define BYTE_MASK ((1 << BITS_PER_BYTE) - 1)
#define BITMAP_FIRST_BYTE_MASK(start) \
	((BYTE_MASK << ((start) & (BITS_PER_BYTE - 1))) & BYTE_MASK)
#define BITMAP_LAST_BYTE_MASK(nbits) \
	(BYTE_MASK >> (-(nbits) & (BITS_PER_BYTE - 1)))

static inline int le_test_bit(int nr, const u8 *addr)
{
	return 1U & (addr[BIT_BYTE(nr)] >> (nr & (BITS_PER_BYTE-1)));
}

struct btrfs_fs_info;

struct extent_io_tree {
	struct cache_tree state;
	struct cache_tree cache;
	u64 cache_size;
};

struct extent_state {
	struct cache_extent cache_node;
	u64 start;
	u64 end;
	int refs;
	unsigned long state;
	u64 xprivate;
};

struct extent_buffer {
	struct cache_extent cache_node;
	u64 start;
	u32 len;
	int refs;
	u32 flags;
	struct btrfs_fs_info *fs_info;
	char *data;
};

static inline void extent_buffer_get(struct extent_buffer *eb)
{
	eb->refs++;
}

void extent_io_tree_init(struct extent_io_tree *tree);
void extent_io_tree_cleanup(struct extent_io_tree *tree);
int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, int bits);
int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, int bits);
int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
			  u64 *start_ret, u64 *end_ret, int bits);
int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
		   int bits, int filled);
int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end);
int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end);
static inline int set_extent_buffer_uptodate(struct extent_buffer *eb)
{
	eb->flags |= EXTENT_UPTODATE;
	return 0;
}

static inline int clear_extent_buffer_uptodate(struct extent_buffer *eb)
{
	eb->flags &= ~EXTENT_UPTODATE;
	return 0;
}

static inline int extent_buffer_uptodate(struct extent_buffer *eb)
{
	if (!eb || IS_ERR(eb))
		return 0;
	if (eb->flags & EXTENT_UPTODATE)
		return 1;
	return 0;
}

int set_state_private(struct extent_io_tree *tree, u64 start, u64 xprivate);
int get_state_private(struct extent_io_tree *tree, u64 start, u64 *xprivate);
struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree,
					 u64 bytenr, u32 blocksize);
struct extent_buffer *find_first_extent_buffer(struct extent_io_tree *tree,
					       u64 start);
struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
					  u64 bytenr, u32 blocksize);
struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src);
struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
						u64 bytenr, u32 blocksize);
void free_extent_buffer(struct extent_buffer *eb);
int read_extent_from_disk(struct blk_desc *desc, struct disk_partition *part,
			  u64 physical, struct extent_buffer *eb,
			  unsigned long offset, unsigned long len);
int memcmp_extent_buffer(const struct extent_buffer *eb, const void *ptrv,
			 unsigned long start, unsigned long len);
void read_extent_buffer(const struct extent_buffer *eb, void *dst,
			unsigned long start, unsigned long len);
void write_extent_buffer(struct extent_buffer *eb, const void *src,
			 unsigned long start, unsigned long len);
void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src,
			unsigned long dst_offset, unsigned long src_offset,
			unsigned long len);
void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
			   unsigned long src_offset, unsigned long len);
void memset_extent_buffer(struct extent_buffer *eb, char c,
			  unsigned long start, unsigned long len);
int extent_buffer_test_bit(struct extent_buffer *eb, unsigned long start,
			   unsigned long nr);
int set_extent_buffer_dirty(struct extent_buffer *eb);
int clear_extent_buffer_dirty(struct extent_buffer *eb);
void extent_buffer_bitmap_clear(struct extent_buffer *eb, unsigned long start,
				unsigned long pos, unsigned long len);
void extent_buffer_bitmap_set(struct extent_buffer *eb, unsigned long start,
			      unsigned long pos, unsigned long len);

#endif
Commit	Line	Data
9a9be5ec QW	1	// SPDX-License-Identifier: GPL-2.0+
	2
	3	/*
	4	* Crossported from btrfs-progs/extent_io.h
	5	*
	6	* Modification includes:
	7	* - extent_buffer:data
	8	* Use pointer to provide better alignment.
	9	* - Remove max_cache_size related interfaces
	10	* Includes free_extent_buffer_nocache()
1be82afa	11	* As we don't cache eb in U-Boot.
9a9be5ec QW	12	* - Include headers
	13	*
	14	* Write related functions are kept as we still need to modify dummy extent
	15	* buffers even in RO environment.
	16	*/
	17	#ifndef __BTRFS_EXTENT_IO_H__
	18	#define __BTRFS_EXTENT_IO_H__
	19
	20	#include <linux/types.h>
	21	#include <linux/list.h>
	22	#include <linux/err.h>
	23	#include <linux/bitops.h>
	24	#include <fs_internal.h>
	25	#include "extent-cache.h"
	26
	27	#define EXTENT_DIRTY (1U << 0)
	28	#define EXTENT_WRITEBACK (1U << 1)
	29	#define EXTENT_UPTODATE (1U << 2)
	30	#define EXTENT_LOCKED (1U << 3)
	31	#define EXTENT_NEW (1U << 4)
	32	#define EXTENT_DELALLOC (1U << 5)
	33	#define EXTENT_DEFRAG (1U << 6)
	34	#define EXTENT_DEFRAG_DONE (1U << 7)
	35	#define EXTENT_BUFFER_FILLED (1U << 8)
	36	#define EXTENT_CSUM (1U << 9)
	37	#define EXTENT_BAD_TRANSID (1U << 10)
	38	#define EXTENT_BUFFER_DUMMY (1U << 11)
	39	#define EXTENT_IOBITS (EXTENT_LOCKED \| EXTENT_WRITEBACK)
	40
	41	#define BLOCK_GROUP_DATA (1U << 1)
	42	#define BLOCK_GROUP_METADATA (1U << 2)
	43	#define BLOCK_GROUP_SYSTEM (1U << 4)
	44
	45	/*
	46	* The extent buffer bitmap operations are done with byte granularity instead of
	47	* word granularity for two reasons:
	48	* 1. The bitmaps must be little-endian on disk.
	49	* 2. Bitmap items are not guaranteed to be aligned to a word and therefore a
	50	* single word in a bitmap may straddle two pages in the extent buffer.
	51	*/
	52	#define BIT_BYTE(nr) ((nr) / BITS_PER_BYTE)
	53	#define BYTE_MASK ((1 << BITS_PER_BYTE) - 1)
	54	#define BITMAP_FIRST_BYTE_MASK(start) \
	55	((BYTE_MASK << ((start) & (BITS_PER_BYTE - 1))) & BYTE_MASK)
	56	#define BITMAP_LAST_BYTE_MASK(nbits) \
	57	(BYTE_MASK >> (-(nbits) & (BITS_PER_BYTE - 1)))
	58
	59	static inline int le_test_bit(int nr, const u8 *addr)
	60	{
	61	return 1U & (addr[BIT_BYTE(nr)] >> (nr & (BITS_PER_BYTE-1)));
	62	}
	63
	64	struct btrfs_fs_info;
	65
	66	struct extent_io_tree {
	67	struct cache_tree state;
	68	struct cache_tree cache;
	69	u64 cache_size;
	70	};
	71
	72	struct extent_state {
	73	struct cache_extent cache_node;
	74	u64 start;
	75	u64 end;
76	int refs;
77	unsigned long state;
78	u64 xprivate;
79	};
80
81	struct extent_buffer {
82	struct cache_extent cache_node;
83	u64 start;
84	u32 len;
85	int refs;
86	u32 flags;
87	struct btrfs_fs_info *fs_info;
88	char *data;
89	};
90
91	static inline void extent_buffer_get(struct extent_buffer *eb)
92	{
93	eb->refs++;
94	}
95
96	void extent_io_tree_init(struct extent_io_tree *tree);
97	void extent_io_tree_cleanup(struct extent_io_tree *tree);
98	int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, int bits);
99	int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, int bits);
100	int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
101	u64 start_ret, u64 end_ret, int bits);
102	int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
103	int bits, int filled);
104	int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end);
105	int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end);
106	static inline int set_extent_buffer_uptodate(struct extent_buffer *eb)
107	{
108	eb->flags \|= EXTENT_UPTODATE;
109	return 0;
110	}
111
112	static inline int clear_extent_buffer_uptodate(struct extent_buffer *eb)
113	{
114	eb->flags &= ~EXTENT_UPTODATE;
115	return 0;
116	}
117
118	static inline int extent_buffer_uptodate(struct extent_buffer *eb)
119	{
120	if (!eb \|\| IS_ERR(eb))
121	return 0;
122	if (eb->flags & EXTENT_UPTODATE)
123	return 1;
124	return 0;
125	}
126
127	int set_state_private(struct extent_io_tree *tree, u64 start, u64 xprivate);
128	int get_state_private(struct extent_io_tree tree, u64 start, u64 xprivate);
129	struct extent_buffer find_extent_buffer(struct extent_io_tree tree,
130	u64 bytenr, u32 blocksize);
131	struct extent_buffer find_first_extent_buffer(struct extent_io_tree tree,
132	u64 start);
133	struct extent_buffer alloc_extent_buffer(struct btrfs_fs_info fs_info,
134	u64 bytenr, u32 blocksize);
135	struct extent_buffer btrfs_clone_extent_buffer(struct extent_buffer src);
136	struct extent_buffer alloc_dummy_extent_buffer(struct btrfs_fs_info fs_info,
137	u64 bytenr, u32 blocksize);
138	void free_extent_buffer(struct extent_buffer *eb);
139	int read_extent_from_disk(struct blk_desc desc, struct disk_partition part,
140	u64 physical, struct extent_buffer *eb,
141	unsigned long offset, unsigned long len);
142	int memcmp_extent_buffer(const struct extent_buffer eb, const void ptrv,
143	unsigned long start, unsigned long len);
144	void read_extent_buffer(const struct extent_buffer eb, void dst,
145	unsigned long start, unsigned long len);
146	void write_extent_buffer(struct extent_buffer eb, const void src,
147	unsigned long start, unsigned long len);
148	void copy_extent_buffer(struct extent_buffer dst, struct extent_buffer src,
149	unsigned long dst_offset, unsigned long src_offset,
150	unsigned long len);
151	void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
152	unsigned long src_offset, unsigned long len);
153	void memset_extent_buffer(struct extent_buffer *eb, char c,
154	unsigned long start, unsigned long len);
155	int extent_buffer_test_bit(struct extent_buffer *eb, unsigned long start,
156	unsigned long nr);
157	int set_extent_buffer_dirty(struct extent_buffer *eb);
158	int clear_extent_buffer_dirty(struct extent_buffer *eb);
159	void extent_buffer_bitmap_clear(struct extent_buffer *eb, unsigned long start,
160	unsigned long pos, unsigned long len);
161	void extent_buffer_bitmap_set(struct extent_buffer *eb, unsigned long start,
162	unsigned long pos, unsigned long len);
163
164	#endif