29 #define bio_iter_iovec(bio, iter)				\  argument
30 	bvec_iter_bvec((bio)->bi_io_vec, (iter))
32 #define bio_iter_page(bio, iter)				\  argument
33 	bvec_iter_page((bio)->bi_io_vec, (iter))
34 #define bio_iter_len(bio, iter)					\  argument
35 	bvec_iter_len((bio)->bi_io_vec, (iter))
36 #define bio_iter_offset(bio, iter)				\  argument
37 	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); )
141 static inline void bio_advance_iter(struct bio *bio, struct bvec_iter *iter,  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()
153 #define __bio_for_each_segment(bvl, bio, iter, start)			\  argument
154 	for (iter = (start);						\
155 	     (iter).bi_size &&						\
156 		((bvl = bio_iter_iovec((bio), (iter))), 1);		\
157 	     bio_advance_iter((bio), &(iter), (bvl).bv_len))
159 #define bio_for_each_segment(bvl, bio, iter)				\  argument
160 	__bio_for_each_segment(bvl, bio, iter, (bio)->bi_iter)
162 #define __bio_for_each_bvec(bvl, bio, iter, start)		\  argument
163 	for (iter = (start);						\
164 	     (iter).bi_size &&						\
165 		((bvl = mp_bvec_iter_bvec((bio)->bi_io_vec, (iter))), 1); \
166 	     bio_advance_iter((bio), &(iter), (bvl).bv_len))
169 #define bio_for_each_bvec(bvl, bio, iter)			\  argument
170 	__bio_for_each_bvec(bvl, bio, iter, (bio)->bi_iter)
172 #define bio_iter_last(bvec, iter) ((iter).bi_size == (bvec).bv_len)  argument
178 	struct bvec_iter iter;  in bio_segments()  local
196 	bio_for_each_segment(bv, bio, iter)  in bio_segments()
254 	struct bvec_iter iter = bio->bi_iter;  in bio_get_last_bvec()  local
262 	bio_advance_iter(bio, &iter, iter.bi_size);  in bio_get_last_bvec()
264 	if (!iter.bi_bvec_done)  in bio_get_last_bvec()
265 		idx = iter.bi_idx - 1;  in bio_get_last_bvec()
267 		idx = iter.bi_idx;  in bio_get_last_bvec()
275 	if (iter.bi_bvec_done)  in bio_get_last_bvec()
276 		bv->bv_len = iter.bi_bvec_done;  in bio_get_last_bvec()
442 int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter);
472 void zero_fill_bio_iter(struct bio *bio, struct bvec_iter iter);
742 #define bip_for_each_vec(bvl, bip, iter)				\  argument
743 	for_each_bvec(bvl, (bip)->bip_vec, iter, (bip)->bip_iter)