SUNRPC: Add /proc/net/rpc/gss_krb5_enctypes file
I would like to replace the KRB5_SUPPORTED_ENCTYPES macro so that there is finer granularity about what enctype support is built in to the kernel and then advertised by it. The /proc/fs/nfsd/supported_krb5_enctypes file is a legacy API that advertises supported enctypes to rpc.svcgssd (I think?). It simply prints the value of the KRB5_SUPPORTED_ENCTYPES macro, so it will need to be replaced with something that can instead display exactly which enctypes are configured and built into the SunRPC layer. Completely decommissioning such APIs is hard. Instead, add a file that is managed by SunRPC's GSS Kerberos mechanism, which is authoritative about enctype support status. A subsequent patch will replace /proc/fs/nfsd/supported_krb5_enctypes with a symlink to this new file. Tested-by: Scott Mayhew <smayhew@redhat.com> Reviewed-by: Simo Sorce <simo@redhat.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
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