nfsd: Add custom rpcbind callbacks for knfsd

Add custom rpcbind callbacks in preparation for the knfsd
per-container version feature.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 46 insertions, 2 deletions

diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 6a52400c85e0..378edcfe9701 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -32,6 +32,18 @@
 
 extern struct svc_program       nfsd_program;
 static int                      nfsd(void *vrqstp);
+#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
+static int                      nfsd_acl_rpcbind_set(struct net *,
+                                                     const struct svc_program *,
+                                                     u32, int,
+                                                     unsigned short,
+                                                     unsigned short);
+#endif
+static int                      nfsd_rpcbind_set(struct net *,
+                                                 const struct svc_program *,
+                                                 u32, int,
+                                                 unsigned short,
+                                                 unsigned short);
 
 /*
  * nfsd_mutex protects nn->nfsd_serv -- both the pointer itself and the members
@@ -87,7 +99,7 @@ static struct svc_program	nfsd_acl_program = {
         .pg_stats               = &nfsd_acl_svcstats,
         .pg_authenticate        = &svc_set_client,
         .pg_init_request        = svc_generic_init_request,
-        .pg_rpcbind_set         = svc_generic_rpcbind_set,
+        .pg_rpcbind_set         = nfsd_acl_rpcbind_set,
 };
 
 static struct svc_stat  nfsd_acl_svcstats = {
@@ -121,7 +133,7 @@ struct svc_program		nfsd_program = {
         .pg_stats               = &nfsd_svcstats,       /* version table */
         .pg_authenticate        = &svc_set_client,      /* export authentication */
         .pg_init_request        = svc_generic_init_request,
-        .pg_rpcbind_set         = svc_generic_rpcbind_set,
+        .pg_rpcbind_set         = nfsd_rpcbind_set,
 };
 
 static bool nfsd_supported_minorversions[NFSD_SUPPORTED_MINOR_VERSION + 1] = {
@@ -670,6 +682,38 @@ out:
         return error;
 }
 
+#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
+static bool
+nfsd_support_acl_version(int vers)
+{
+        if (vers >= NFSD_ACL_MINVERS && vers < NFSD_ACL_NRVERS)
+                return nfsd_acl_version[vers] != NULL;
+        return false;
+}
+
+static int
+nfsd_acl_rpcbind_set(struct net *net, const struct svc_program *progp,
+                     u32 version, int family, unsigned short proto,
+                     unsigned short port)
+{
+        if (!nfsd_support_acl_version(version) ||
+            !nfsd_vers(version, NFSD_TEST))
+                return 0;
+        return svc_generic_rpcbind_set(net, progp, version, family,
+                        proto, port);
+}
+#endif
+
+static int
+nfsd_rpcbind_set(struct net *net, const struct svc_program *progp,
+                 u32 version, int family, unsigned short proto,
+                 unsigned short port)
+{
+        if (!nfsd_vers(version, NFSD_TEST))
+                return 0;
+        return svc_generic_rpcbind_set(net, progp, version, family,
+                        proto, port);
+}
 
 /*
  * This is the NFS server kernel thread