On 12/6/06, Rob Ross <rross@xxxxxxxxxxx> wrote:
David Chinner wrote: > On Tue, Dec 05, 2006 at 05:47:16PM +0100, Latchesar Ionkov wrote: >> On 12/5/06, Rob Ross <rross@xxxxxxxxxxx> wrote: >>> Hi, >>> >>> I agree that it is not feasible to add new system calls every time >>> somebody has a problem, and we don't take adding system calls lightly. >>> However, in this case we're talking about an entire *community* of >>> people (high-end computing), not just one or two people. Of course it >>> may still be the case that that community is not important enough to >>> justify the addition of system calls; that's obviously not my call to make! >> I have the feeling that openg stuff is rushed without looking into all >> solutions, that don't require changes to the current interface. > > I also get the feeling that interfaces that already do this > open-by-handle stuff haven't been explored either. > > Does anyone here know about the XFS libhandle API? This has been > around for years and it does _exactly_ what these proposed syscalls > are supposed to do (and more). > > See: > > http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi?coll=linux&db=man&fname=/usr/share/catman/man3/open_by_handle.3.html&srch=open_by_handle > > For the libhandle man page. Basically: > > openg == path_to_handle > sutoc == open_by_handle > > And here for the userspace code: > > http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-cmds/xfsprogs/libhandle/ > > Cheers, > > Dave. Thanks for pointing these out Dave. These are indeed along the same lines as the openg()/openfh() approach.
The open-by-handle makes a little more sense, because the "handle" is not opened, it only points to a resolved file. As I mentioned before, it doesn't make much sense to bundle in openg name resolution and file open. Still I am not convinced that we need two ways of "finding" files. Thanks, Lucho - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
