On Tue, 2023-08-29 at 23:44 +0100, Al Viro wrote: > On Tue, Jul 25, 2023 at 10:58:14AM -0400, Jeff Layton wrote: > > generic_fillattr just fills in the entire stat struct indiscriminately > > today, copying data from the inode. There is at least one attribute > > (STATX_CHANGE_COOKIE) that can have side effects when it is reported, > > and we're looking at adding more with the addition of multigrain > > timestamps. > > > > Add a request_mask argument to generic_fillattr and have most callers > > just pass in the value that is passed to getattr. Have other callers > > (e.g. ksmbd) just pass in STATX_BASIC_STATS. Also move the setting of > > STATX_CHANGE_COOKIE into generic_fillattr. > > Out of curiosity - how much PITA would it be to put request_mask into > kstat? Set it in vfs_getattr_nosec() (and those get_file_..._info() > on smbd side) and don't bother with that kind of propagation boilerplate > - just have generic_fillattr() pick it there... > > Reduces the patchset size quite a bit... It could be done. To do that right, I think we'd want to drop request_mask from the ->getattr prototype as well and just have everything use the mask in the kstat. I don't think it'd reduce the size of the patchset in any meaningful way, but it might make for a more sensible API over the long haul. -- Jeff Layton <jlayton@xxxxxxxxxx>
