On 12/23/2016 17:25, Christoph Hellwig wrote: > On Fri, Dec 23, 2016 at 05:18:03PM +0800, Kinglong Mee wrote: >> We can check it in check_export() when exporting filesystem, >> but, what can we do for the unsupported fsync filesystem? >> Just a warning message? or deny the exporting? >> I'd prefer the first one. > > Warn and refuse the writable export. > I'd like warn and covert the export to read-only straightly. For example, A test directory may be mounted many underlay filesystem (contain ISO9660, f2fs, etc) frequently. If refuse the writeable export, for ISO9660 the exports entry must be *(ro,...), but for f2fs may be *(rw,...). I don't think someone wants change it every time. thanks, Kinglong Mee -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html