nfsd41: control nfsv4.1 svc via /proc/fs/nfsd/versions

Support enabling and disabling nfsv4.1 via /proc/fs/nfsd/versions
by writing the strings "+4.1" or "-4.1" correspondingly.

Use user mode nfs-utils (rpc.nfsd option) to enable.
This will allow us to get rid of CONFIG_NFSD_V4_1

[nfsd41: disable support for minorversion by default]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index db208dd8fdca..52bb14debb30 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -921,7 +921,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
          * According to RFC3010, this takes precedence over all other errors.
          */
         status = nfserr_minor_vers_mismatch;
-        if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
+        if (args->minorversion > nfsd_supported_minorversion)
                 goto out;
 
         if (!nfs41_op_ordering_ok(args)) {