813 	cursor->resid = min_t(size_t, length, data->bio_length);  in ceph_msg_data_bio_cursor_init()
815 	if (cursor->resid < it->iter.bi_size)  in ceph_msg_data_bio_cursor_init()
816 		it->iter.bi_size = cursor->resid;  in ceph_msg_data_bio_cursor_init()
818 	BUG_ON(cursor->resid < bio_iter_len(it->bio, it->iter));  in ceph_msg_data_bio_cursor_init()
819 	cursor->last_piece = cursor->resid == bio_iter_len(it->bio, it->iter);  in ceph_msg_data_bio_cursor_init()
840 	BUG_ON(bytes > cursor->resid);  in ceph_msg_data_bio_advance()
842 	cursor->resid -= bytes;  in ceph_msg_data_bio_advance()
845 	if (!cursor->resid) {  in ceph_msg_data_bio_advance()
857 		if (cursor->resid < it->iter.bi_size)  in ceph_msg_data_bio_advance()
858 			it->iter.bi_size = cursor->resid;  in ceph_msg_data_bio_advance()
862 	BUG_ON(cursor->resid < bio_iter_len(it->bio, it->iter));  in ceph_msg_data_bio_advance()
863 	cursor->last_piece = cursor->resid == bio_iter_len(it->bio, it->iter);  in ceph_msg_data_bio_advance()
874 	cursor->resid = min_t(size_t, length, data->bvec_pos.iter.bi_size);  in ceph_msg_data_bvecs_cursor_init()
876 	cursor->bvec_iter.bi_size = cursor->resid;  in ceph_msg_data_bvecs_cursor_init()
878 	BUG_ON(cursor->resid < bvec_iter_len(bvecs, cursor->bvec_iter));  in ceph_msg_data_bvecs_cursor_init()
880 	    cursor->resid == bvec_iter_len(bvecs, cursor->bvec_iter);  in ceph_msg_data_bvecs_cursor_init()
901 	BUG_ON(bytes > cursor->resid);  in ceph_msg_data_bvecs_advance()
903 	cursor->resid -= bytes;  in ceph_msg_data_bvecs_advance()
906 	if (!cursor->resid) {  in ceph_msg_data_bvecs_advance()
916 	BUG_ON(cursor->resid < bvec_iter_len(bvecs, cursor->bvec_iter));  in ceph_msg_data_bvecs_advance()
918 	    cursor->resid == bvec_iter_len(bvecs, cursor->bvec_iter);  in ceph_msg_data_bvecs_advance()
937 	cursor->resid = min(length, data->length);  in ceph_msg_data_pages_cursor_init()
944 	cursor->last_piece = cursor->page_offset + cursor->resid <= PAGE_SIZE;  in ceph_msg_data_pages_cursor_init()
960 		*length = cursor->resid;  in ceph_msg_data_pages_next()
976 	cursor->resid -= bytes;  in ceph_msg_data_pages_advance()
981 	if (!cursor->resid)  in ceph_msg_data_pages_advance()
988 	cursor->last_piece = cursor->resid <= PAGE_SIZE;  in ceph_msg_data_pages_advance()
1016 	cursor->resid = min(length, pagelist->length);  in ceph_msg_data_pagelist_cursor_init()
1019 	cursor->last_piece = cursor->resid <= PAGE_SIZE;  in ceph_msg_data_pagelist_cursor_init()
1035 	BUG_ON(cursor->offset + cursor->resid != pagelist->length);  in ceph_msg_data_pagelist_next()
1040 		*length = cursor->resid;  in ceph_msg_data_pagelist_next()
1058 	BUG_ON(cursor->offset + cursor->resid != pagelist->length);  in ceph_msg_data_pagelist_advance()
1063 	cursor->resid -= bytes;  in ceph_msg_data_pagelist_advance()
1069 	if (!cursor->resid)  in ceph_msg_data_pagelist_advance()
1076 	cursor->last_piece = cursor->resid <= PAGE_SIZE;  in ceph_msg_data_pagelist_advance()
1165 	BUG_ON(*length > cursor->resid);  in ceph_msg_data_next()
1181 	BUG_ON(bytes > cursor->resid);  in ceph_msg_data_advance()
1204 	if (!cursor->resid && cursor->total_resid) {  in ceph_msg_data_advance()
1580 		if (!cursor->resid) {  in write_partial_message_data()
2327 		if (!cursor->resid) {  in read_partial_msg_data()