Ralf Baechle wrote: > On Thu, Nov 15, 2007 at 11:26:06AM -0800, Kaz Kylheku wrote: > >> After backing out the nfsutils patch, the diskless node does boot. >> >> However, the original "exportfs -a" problem comes back! >> >> So this problem is not resolved simply by using the correct compat >> routine; it's deeper. >> >> Sigh. > > Thanks for testing anyway! I'm continuing to dig into the problem. The export logic doesn't even go through nfsctl() anyway, which is why I originally hadn't even suspected that syscall. The nfsexport() function in nfsutils first tries opening "/proc/net/rpc/nfsd.fh./channel". If that works, it uses that, via a text-based protocol. Only if that interface doesn't exist does it fall back on the nfsctl(NFSCTL_EXPORT, ...) interface.
