Messages in this thread |  | | From | "H. Peter Anvin" <> | Subject | Re: automount doesn't "follow" bind mounts | Date | 20 Aug 2002 14:35:26 -0700 |
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Followup to: <ajuahu$hf$1@cesium.transmeta.com> By author: "H. Peter Anvin" <hpa@zytor.com> In newsgroup: linux.dev.kernel > > Followup to: <Pine.LNX.4.44.0208201752430.23681-100000@r2-pc.dcs.qmul.ac.uk> > By author: Matt Bernstein <mb/lkml@dcs.qmul.ac.uk> > In newsgroup: linux.dev.kernel > > > > I tried to subscribe to the autofs list, but majordomo isn't replying to > > me! I think this is a problem in the automount daemon rather than the > > kernel autofs code itself. > > > > I'm trying to automount our home dirs as > > /homes/$USERNAME > > which should bind mount to > > :/home/$SERVER/$HOMENAME/$USERNAME > > which should bind mount to > > :/home/$SERVER/$VOLUME/$PATH/$USERNAME > > which (phew!) will be an NFS mount to > > $SERVER:/$VOLUME/$PATH/$USERNAME > > > > The idea is that: > > (1) `/bin/pwd` = "/homes/$USERNAME" > > (2) when you run "quota" it'll only report for $SERVER:/$VOLUME > > > > Now.. this all works perfectly if before looking at /homes/$USERNAME you > > look at firstly /home/$SERVER/$VOLUME/$PATH/$USERNAME and then secondly > > /home/$SERVER/$HOMENAME/$USERNAME, because the bind mounts have something > > to bind to. Of course you shouldn't need to know the middle bits, but you > > could look them up. Currently the binds mount fail and automount drops in > > symlinks; this satisfies (2) above, but unfortunately not (1). > > > > I hope someone can make sense of this. Is it different in autofs4? > > > > This is unfortunately nearly impossible to solve. It's a known bug, > but it's questionable if anything can be done about it. > > For right now, autofs cannot bind-mount to a mount from the same > automount point (the problem is with the double-use of /home/$SERVER > in your case.) >
Actually, if you're using autofs v3, which it sounds like you're doing, it's even more broken, since autofs v3 doesn't support multilevel mounts.
-hpa -- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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