32 #define bio_iter_iovec(bio, iter)				\  argument
33 	bvec_iter_bvec((bio)->bi_io_vec, (iter))
35 #define bio_iter_page(bio, iter)				\  argument
36 	bvec_iter_page((bio)->bi_io_vec, (iter))
37 #define bio_iter_len(bio, iter)					\  argument
38 	bvec_iter_len((bio)->bi_io_vec, (iter))
39 #define bio_iter_offset(bio, iter)				\  argument
40 	bvec_iter_offset((bio)->bi_io_vec, (iter))
46 #define bvec_iter_sectors(iter)	((iter).bi_size >> 9)  argument
47 #define bvec_iter_end_sector(iter) ((iter).bi_sector + bvec_iter_sectors((iter)))  argument
125 				    struct bvec_iter_all *iter)  in bio_next_segment()  argument
127 	if (iter->idx >= bio->bi_vcnt)  in bio_next_segment()
130 	bvec_advance(&bio->bi_io_vec[iter->idx], iter);  in bio_next_segment()
138 #define bio_for_each_segment_all(bvl, bio, iter) \  argument
139 	for (bvl = bvec_init_iter_all(&iter); bio_next_segment((bio), &iter); )
142 				    struct bvec_iter *iter, unsigned int bytes)  in bio_advance_iter()  argument
144 	iter->bi_sector += bytes >> 9;  in bio_advance_iter()
147 		iter->bi_size -= bytes;  in bio_advance_iter()
149 		bvec_iter_advance(bio->bi_io_vec, iter, bytes);  in bio_advance_iter()
155 					   struct bvec_iter *iter,  in bio_advance_iter_single()  argument
158 	iter->bi_sector += bytes >> 9;  in bio_advance_iter_single()
161 		iter->bi_size -= bytes;  in bio_advance_iter_single()
163 		bvec_iter_advance_single(bio->bi_io_vec, iter, bytes);  in bio_advance_iter_single()
166 #define __bio_for_each_segment(bvl, bio, iter, start)			\  argument
167 	for (iter = (start);						\
168 	     (iter).bi_size &&						\
169 		((bvl = bio_iter_iovec((bio), (iter))), 1);		\
170 	     bio_advance_iter_single((bio), &(iter), (bvl).bv_len))
172 #define bio_for_each_segment(bvl, bio, iter)				\  argument
173 	__bio_for_each_segment(bvl, bio, iter, (bio)->bi_iter)
175 #define __bio_for_each_bvec(bvl, bio, iter, start)		\  argument
176 	for (iter = (start);						\
177 	     (iter).bi_size &&						\
178 		((bvl = mp_bvec_iter_bvec((bio)->bi_io_vec, (iter))), 1); \
179 	     bio_advance_iter_single((bio), &(iter), (bvl).bv_len))
182 #define bio_for_each_bvec(bvl, bio, iter)			\  argument
183 	__bio_for_each_bvec(bvl, bio, iter, (bio)->bi_iter)
193 #define bio_iter_last(bvec, iter) ((iter).bi_size == (bvec).bv_len)  argument
199 	struct bvec_iter iter;  in bio_segments()  local
217 	bio_for_each_segment(bv, bio, iter)  in bio_segments()
275 	struct bvec_iter iter = bio->bi_iter;  in bio_get_last_bvec()  local
282 	bio_advance_iter(bio, &iter, iter.bi_size);  in bio_get_last_bvec()
284 	if (!iter.bi_bvec_done)  in bio_get_last_bvec()
285 		idx = iter.bi_idx - 1;  in bio_get_last_bvec()
287 		idx = iter.bi_idx;  in bio_get_last_bvec()
295 	if (iter.bi_bvec_done)  in bio_get_last_bvec()
296 		bv->bv_len = iter.bi_bvec_done;  in bio_get_last_bvec()
449 static inline int bio_iov_vecs_to_alloc(struct iov_iter *iter, int max_segs)  in bio_iov_vecs_to_alloc()  argument
451 	if (iov_iter_is_bvec(iter))  in bio_iov_vecs_to_alloc()
453 	return iov_iter_npages(iter, max_segs);  in bio_iov_vecs_to_alloc()
476 int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter);
698 #define bip_for_each_vec(bvl, bip, iter)				\  argument
699 	for_each_bvec(bvl, (bip)->bip_vec, iter, (bip)->bip_iter)