cephfs内核客户端回写
cephfs内核客户端回写：
const struct address_space_operations ceph_aops = {.readpage = ceph_readpage,.readpages = ceph_readpages,.writepage = ceph_writepage,.writepages = ceph_writepages_start,.write_begin = ceph_write_begin,.write_end = ceph_write_end,.set_page_dirty = ceph_set_page_dirty,.invalidatepage = ceph_invalidatepage,.releasepage = ceph_releasepage,.direct_IO = ceph_direct_io,
};