On Thu, Nov 29, 2012 at 04:19:51PM -0800, Patrick McLean wrote:
> >> [ 8.821584] FH(0)]
> >> [ 8.821586] FH(36)[01 00 07 01 89 00 00 00 00 00 00 00 e1 21 fe c4 9e 38 44 dc bf 1b d5 95 d6 76 d6 d9 a7 3c 1b 80 33 38 e3 62]
> >> [ 8.821601] filename: proc
> >
> > *whoa*
> >
> > So we have zero entry->fh->size? No wonder it doesn't match... Which NFS
> > version it is? entry->fh->size is set by nfs[34]_decode_dirent().
>
> This is nfs v3 over TCP on Linus git at commit e9296e89b85604862bd9ec2d54dc43edad775c0d with nfs-utils-1.2.6 userspace.
So we have nfs3_decode_dirent(), stepping into
/* In fact, a post_op_fh3: */
p = xdr_inline_decode(xdr, 4);
if (unlikely(p == NULL))
goto out_overflow;
if (*p != xdr_zero) {
error = decode_nfs_fh3(xdr, entry->fh);
if (unlikely(error)) {
if (error == -E2BIG)
goto out_truncated;
return error;
}
} else
zero_nfs_fh3(entry->fh);
Interesting... Server-side that should've been produced by
encode_entryplus_baggage(), which looks like failing compose_entry_fh()...
which has explicit
if (d_mountpoint(dchild))
goto out;
resulting in ENOENT on everything that's overmounted on server.
Do you, by any chance, have the server really exporting its own root
filesystem? Another thing to check: have nfs_prime_dcache() print
filename.name of everything that fails nfs_same_entry() and has
zero entry->fh->size, regardless of d_invalidate() results.
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