• Weston Andros Adamson's avatar
    NFS: add support for multiple sec= mount options · 4d4b69dd
    Weston Andros Adamson authored
    This patch adds support for multiple security options which can be
    specified using a colon-delimited list of security flavors (the same
    syntax as nfsd's exports file).
    
    This is useful, for instance, when NFSv4.x mounts cross SECINFO
    boundaries. With this patch a user can use "sec=krb5i,krb5p"
    to mount a remote filesystem using krb5i, but can still cross
    into krb5p-only exports.
    
    New mounts will try all security options before failing.  NFSv4.x
    SECINFO results will be compared against the sec= flavors to
    find the first flavor in both lists or if no match is found will
    return -EPERM.
    Signed-off-by: default avatarWeston Andros Adamson <dros@netapp.com>
    Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
    4d4b69dd
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