fs/btrfs/extent_io.h

100 	 * The address where the eb can be accessed without any cross-page handling.
108 	/* >= 0 if eb belongs to a log tree, -1 otherwise */
129 	struct extent_buffer *eb;
130 	/* Block group @eb resides in. Only used for zoned mode. */
134 static inline unsigned long offset_in_eb_folio(const struct extent_buffer *eb,
137 	ASSERT(eb->folio_size);
138 	return start & (eb->folio_size - 1);
144  * @eb:		target extent buffer
149 static inline size_t get_eb_offset_in_folio(const struct extent_buffer *eb,
154 	 *    1.1) One large folio covering the whole eb
155 	 *	   The eb->start is aligned to folio size, thus adding it
158 	 *	   The eb->start is aligned to folio (page) size, thus
164 	 *    We need to add eb->start to properly access the offset inside
165 	 *    that eb.
167 	return offset_in_folio(eb->folios[0], offset + eb->start);
170 static inline unsigned long get_eb_folio_index(const struct extent_buffer *eb,
175 	 *    1.1) One large folio covering the whole eb.
185 	return offset >> eb->folio_shift;
260 void free_extent_buffer(struct extent_buffer *eb);
261 void free_extent_buffer_stale(struct extent_buffer *eb);
265 int read_extent_buffer_pages(struct extent_buffer *eb, int wait, int mirror_num,
267 void wait_on_extent_buffer_writeback(struct extent_buffer *eb);
272 static inline int num_extent_pages(const struct extent_buffer *eb)
276 	 * sectorsize, it's just eb->len >> PAGE_SHIFT.
281 	return (eb->len >> PAGE_SHIFT) ?: 1;
285  * This can only be determined at runtime by checking eb::folios[0].
287  * As we can have either one large folio covering the whole eb
291 static inline int num_extent_folios(const struct extent_buffer *eb)
293 	if (folio_order(eb->folios[0]))
295 	return num_extent_pages(eb);
298 static inline int extent_buffer_uptodate(const struct extent_buffer *eb)
300 	return test_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags);
303 int memcmp_extent_buffer(const struct extent_buffer *eb, const void *ptrv,
305 void read_extent_buffer(const struct extent_buffer *eb, void *dst,
308 int read_extent_buffer_to_user_nofault(const struct extent_buffer *eb,
311 void write_extent_buffer(const struct extent_buffer *eb, const void *src,
315 		const struct extent_buffer *eb, const void *chunk_tree_uuid)
317 	write_extent_buffer(eb, chunk_tree_uuid,
322 static inline void write_extent_buffer_fsid(const struct extent_buffer *eb,
325 	write_extent_buffer(eb, fsid, offsetof(struct btrfs_header, fsid),
341 void memzero_extent_buffer(const struct extent_buffer *eb, unsigned long start,
343 int extent_buffer_test_bit(const struct extent_buffer *eb, unsigned long start,
345 void extent_buffer_bitmap_set(const struct extent_buffer *eb, unsigned long start,
347 void extent_buffer_bitmap_clear(const struct extent_buffer *eb,
350 void set_extent_buffer_dirty(struct extent_buffer *eb);
351 void set_extent_buffer_uptodate(struct extent_buffer *eb);
352 void clear_extent_buffer_uptodate(struct extent_buffer *eb);