From: Weston Andros Adamson <dros@netapp.com>
Date: Tue, 24 Sep 2013 17:58:02 +0000 (-0400)
Subject: NFSv4.1: try SECINFO_NO_NAME flavs until one works
X-Git-Tag: v3.12-rc4~34^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=58a8cf1212f0f3b9afb07b73647a2bca4e5a28af;p=pandora-kernel.git

NFSv4.1: try SECINFO_NO_NAME flavs until one works

Call nfs4_lookup_root_sec for each flavor returned by SECINFO_NO_NAME until
one works.

One example of a situation this fixes:

 - server configured for krb5
 - server principal somehow gets deleted from KDC
 - server still thinking krb is good, sends krb5 as first entry in
    SECINFO_NO_NAME response
 - client tries krb5, but this fails without even sending an RPC because
    gssd's requests to the KDC can't find the server's principal

Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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