820 	cursor->resid = min_t(size_t, length, data->bio_length);  in ceph_msg_data_bio_cursor_init()
822 	if (cursor->resid < it->iter.bi_size)  in ceph_msg_data_bio_cursor_init()
823 		it->iter.bi_size = cursor->resid;  in ceph_msg_data_bio_cursor_init()
825 	BUG_ON(cursor->resid < bio_iter_len(it->bio, it->iter));  in ceph_msg_data_bio_cursor_init()
826 	cursor->last_piece = cursor->resid == bio_iter_len(it->bio, it->iter);  in ceph_msg_data_bio_cursor_init()
847 	BUG_ON(bytes > cursor->resid);  in ceph_msg_data_bio_advance()
849 	cursor->resid -= bytes;  in ceph_msg_data_bio_advance()
852 	if (!cursor->resid) {  in ceph_msg_data_bio_advance()
864 		if (cursor->resid < it->iter.bi_size)  in ceph_msg_data_bio_advance()
865 			it->iter.bi_size = cursor->resid;  in ceph_msg_data_bio_advance()
869 	BUG_ON(cursor->resid < bio_iter_len(it->bio, it->iter));  in ceph_msg_data_bio_advance()
870 	cursor->last_piece = cursor->resid == bio_iter_len(it->bio, it->iter);  in ceph_msg_data_bio_advance()
881 	cursor->resid = min_t(size_t, length, data->bvec_pos.iter.bi_size);  in ceph_msg_data_bvecs_cursor_init()
883 	cursor->bvec_iter.bi_size = cursor->resid;  in ceph_msg_data_bvecs_cursor_init()
885 	BUG_ON(cursor->resid < bvec_iter_len(bvecs, cursor->bvec_iter));  in ceph_msg_data_bvecs_cursor_init()
887 	    cursor->resid == bvec_iter_len(bvecs, cursor->bvec_iter);  in ceph_msg_data_bvecs_cursor_init()
908 	BUG_ON(bytes > cursor->resid);  in ceph_msg_data_bvecs_advance()
910 	cursor->resid -= bytes;  in ceph_msg_data_bvecs_advance()
913 	if (!cursor->resid) {  in ceph_msg_data_bvecs_advance()
923 	BUG_ON(cursor->resid < bvec_iter_len(bvecs, cursor->bvec_iter));  in ceph_msg_data_bvecs_advance()
925 	    cursor->resid == bvec_iter_len(bvecs, cursor->bvec_iter);  in ceph_msg_data_bvecs_advance()
944 	cursor->resid = min(length, data->length);  in ceph_msg_data_pages_cursor_init()
951 	cursor->last_piece = cursor->page_offset + cursor->resid <= PAGE_SIZE;  in ceph_msg_data_pages_cursor_init()
967 		*length = cursor->resid;  in ceph_msg_data_pages_next()
983 	cursor->resid -= bytes;  in ceph_msg_data_pages_advance()
988 	if (!cursor->resid)  in ceph_msg_data_pages_advance()
995 	cursor->last_piece = cursor->resid <= PAGE_SIZE;  in ceph_msg_data_pages_advance()
1023 	cursor->resid = min(length, pagelist->length);  in ceph_msg_data_pagelist_cursor_init()
1026 	cursor->last_piece = cursor->resid <= PAGE_SIZE;  in ceph_msg_data_pagelist_cursor_init()
1042 	BUG_ON(cursor->offset + cursor->resid != pagelist->length);  in ceph_msg_data_pagelist_next()
1047 		*length = cursor->resid;  in ceph_msg_data_pagelist_next()
1065 	BUG_ON(cursor->offset + cursor->resid != pagelist->length);  in ceph_msg_data_pagelist_advance()
1070 	cursor->resid -= bytes;  in ceph_msg_data_pagelist_advance()
1076 	if (!cursor->resid)  in ceph_msg_data_pagelist_advance()
1083 	cursor->last_piece = cursor->resid <= PAGE_SIZE;  in ceph_msg_data_pagelist_advance()
1172 	BUG_ON(*length > cursor->resid);  in ceph_msg_data_next()
1188 	BUG_ON(bytes > cursor->resid);  in ceph_msg_data_advance()
1211 	if (!cursor->resid && cursor->total_resid) {  in ceph_msg_data_advance()
1587 		if (!cursor->resid) {  in write_partial_message_data()
2336 		if (!cursor->resid) {  in read_partial_msg_data()