72 #define EXTENT_FOLIO_PRIVATE			1
77  * 1. The bitmaps must be little-endian on disk.
82 #define BYTE_MASK ((1 << BITS_PER_BYTE) - 1)
84 	((BYTE_MASK << ((start) & (BITS_PER_BYTE - 1))) & BYTE_MASK)
86 	(BYTE_MASK >> (-(nbits) & (BITS_PER_BYTE - 1)))
101 	 * The address where the eb can be accessed without any cross-page handling.
109 	/* >= 0 if eb belongs to a log tree, -1 otherwise */
130 	struct extent_buffer *eb;  member
131 	/* Block group @eb resides in. Only used for zoned mode. */
135 static inline unsigned long offset_in_eb_folio(const struct extent_buffer *eb,  in offset_in_eb_folio()  argument
138 	ASSERT(eb->folio_size);  in offset_in_eb_folio()
139 	return start & (eb->folio_size - 1);  in offset_in_eb_folio()
145  * @eb:		target extent buffer
150 static inline size_t get_eb_offset_in_folio(const struct extent_buffer *eb,  in get_eb_offset_in_folio()  argument
154 	 * 1) sectorsize == PAGE_SIZE and nodesize >= PAGE_SIZE case  in get_eb_offset_in_folio()
155 	 *    1.1) One large folio covering the whole eb  in get_eb_offset_in_folio()
156 	 *	   The eb->start is aligned to folio size, thus adding it  in get_eb_offset_in_folio()
159 	 *	   The eb->start is aligned to folio (page) size, thus  in get_eb_offset_in_folio()
165 	 *    We need to add eb->start to properly access the offset inside  in get_eb_offset_in_folio()
166 	 *    that eb.  in get_eb_offset_in_folio()
168 	return offset_in_folio(eb->folios[0], offset + eb->start);  in get_eb_offset_in_folio()
171 static inline unsigned long get_eb_folio_index(const struct extent_buffer *eb,  in get_eb_folio_index()  argument
175 	 * 1) sectorsize == PAGE_SIZE and nodesize >= PAGE_SIZE case  in get_eb_folio_index()
176 	 *    1.1) One large folio covering the whole eb.  in get_eb_folio_index()
186 	return offset >> eb->folio_shift;  in get_eb_folio_index()
262 void free_extent_buffer(struct extent_buffer *eb);
263 void free_extent_buffer_stale(struct extent_buffer *eb);
264 int read_extent_buffer_pages(struct extent_buffer *eb, int mirror_num,
266 int read_extent_buffer_pages_nowait(struct extent_buffer *eb, int mirror_num,
269 static inline void wait_on_extent_buffer_writeback(struct extent_buffer *eb)  in wait_on_extent_buffer_writeback()  argument
271 	wait_on_bit_io(&eb->bflags, EXTENT_BUFFER_WRITEBACK,  in wait_on_extent_buffer_writeback()
279 static inline int num_extent_pages(const struct extent_buffer *eb)  in num_extent_pages()  argument
283 	 * sectorsize, it's just eb->len >> PAGE_SHIFT.  in num_extent_pages()
288 	return (eb->len >> PAGE_SHIFT) ?: 1;  in num_extent_pages()
292  * This can only be determined at runtime by checking eb::folios[0].
294  * As we can have either one large folio covering the whole eb
298 static inline int num_extent_folios(const struct extent_buffer *eb)  in num_extent_folios()  argument
300 	if (folio_order(eb->folios[0]))  in num_extent_folios()
301 		return 1;  in num_extent_folios()
302 	return num_extent_pages(eb);  in num_extent_folios()
305 static inline int extent_buffer_uptodate(const struct extent_buffer *eb)  in extent_buffer_uptodate()  argument
307 	return test_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags);  in extent_buffer_uptodate()
310 int memcmp_extent_buffer(const struct extent_buffer *eb, const void *ptrv,
312 void read_extent_buffer(const struct extent_buffer *eb, void *dst,
315 int read_extent_buffer_to_user_nofault(const struct extent_buffer *eb,
318 void write_extent_buffer(const struct extent_buffer *eb, const void *src,
322 		const struct extent_buffer *eb, const void *chunk_tree_uuid)  in write_extent_buffer_chunk_tree_uuid()  argument
324 	write_extent_buffer(eb, chunk_tree_uuid,  in write_extent_buffer_chunk_tree_uuid()
329 static inline void write_extent_buffer_fsid(const struct extent_buffer *eb,  in write_extent_buffer_fsid()  argument
332 	write_extent_buffer(eb, fsid, offsetof(struct btrfs_header, fsid),  in write_extent_buffer_fsid()
348 void memzero_extent_buffer(const struct extent_buffer *eb, unsigned long start,
350 int extent_buffer_test_bit(const struct extent_buffer *eb, unsigned long start,
352 void extent_buffer_bitmap_set(const struct extent_buffer *eb, unsigned long start,
354 void extent_buffer_bitmap_clear(const struct extent_buffer *eb,
357 void set_extent_buffer_dirty(struct extent_buffer *eb);
358 void set_extent_buffer_uptodate(struct extent_buffer *eb);
359 void clear_extent_buffer_uptodate(struct extent_buffer *eb);