On Thu, Mar 7, 2024 at 2:04 PM Steve French <smfrench@xxxxxxxxx> wrote: > > On Thu, Mar 7, 2024 at 11:45 AM Kent Overstreet > <kent.overstreet@xxxxxxxxx> wrote: > > > > On Thu, Mar 07, 2024 at 10:37:13AM -0600, Steve French wrote: > > > > Which API is used in other OS to query the offline bit? > > > > Do they use SMB specific API, as Windows does? > > > > > > No it is not smb specific - a local fs can also report this. It is > > > included in the attribute bits for files and directories, it also > > > includes a few additional bits that are used by HSM software on local > > > drives (e.g. FILE_ATTRIBUTE_PINNED when the file may not be taken > > > offline by HSM software) > > > ATTRIBUTE_HIDDEN > > > ATTRIBUTE_SYSTEM > > > ATTRIBUTE_DIRECTORY > > > ATTRIGBUTE_ARCHIVE > > > ATTRIBUTE_TEMPORARY > > > ATTRIBUTE_SPARSE_FILE > > > ATTRIBUTE_REPARE_POINT > > > ATTRIBUTE_COMPRESSED > > > ATTRIBUTE_NOT_CONTENT_INDEXED > > > ATTRIBUTE_ENCRYPTED > > > ATTRIBUTE_OFFLINE > > > > we've already got some of these as inode flags available with the > > getflags ioctl (compressed, also perhaps encrypted?) - but statx does > > seem a better place for them. > > > > statx can also report when they're supported, which does make sense for > > these. > > > > ATTRIBUTE_DIRECTORY, though? > > > > we also need to try to define the semantics for these and not just dump > > them in as just a bunch of identifiers if we want them to be used by > > other things - and we do. > > They are all pretty clearly defined, but many are already in Linux, > and a few are not relevant (e.g. ATTRIBUTE_DIRECTORY is handled in > mode bits). I suspect that Macs have equivalents of most of these > too. MacOS and FreeBSD return many of these in stat(2) output via st_flags. Current set of supported flags are documented in chflags(2) manpage on both platforms.
