1 files changed, 143 insertions, 0 deletions

diff --git a/net/sunrpc/auth_null.c b/net/sunrpc/auth_null.c
new file mode 100644
index 000000000000..9b72d3abf823
--- /dev/null
+++ b/net/sunrpc/auth_null.c
@@ -0,0 +1,143 @@
+/*
+ * linux/net/sunrpc/auth_null.c
+ *
+ * AUTH_NULL authentication. Really :-)
+ *
+ * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
+ */
+
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/module.h>
+#include <linux/in.h>
+#include <linux/utsname.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/sched.h>
+
+#ifdef RPC_DEBUG
+# define RPCDBG_FACILITY        RPCDBG_AUTH
+#endif
+
+static struct rpc_auth null_auth;
+static struct rpc_cred null_cred;
+
+static struct rpc_auth *
+nul_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
+{
+        atomic_inc(&null_auth.au_count);
+        return &null_auth;
+}
+
+static void
+nul_destroy(struct rpc_auth *auth)
+{
+}
+
+/*
+ * Lookup NULL creds for current process
+ */
+static struct rpc_cred *
+nul_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
+{
+        return get_rpccred(&null_cred);
+}
+
+/*
+ * Destroy cred handle.
+ */
+static void
+nul_destroy_cred(struct rpc_cred *cred)
+{
+}
+
+/*
+ * Match cred handle against current process
+ */
+static int
+nul_match(struct auth_cred *acred, struct rpc_cred *cred, int taskflags)
+{
+        return 1;
+}
+
+/*
+ * Marshal credential.
+ */
+static u32 *
+nul_marshal(struct rpc_task *task, u32 *p)
+{
+        *p++ = htonl(RPC_AUTH_NULL);
+        *p++ = 0;
+        *p++ = htonl(RPC_AUTH_NULL);
+        *p++ = 0;
+
+        return p;
+}
+
+/*
+ * Refresh credential. This is a no-op for AUTH_NULL
+ */
+static int
+nul_refresh(struct rpc_task *task)
+{
+        task->tk_msg.rpc_cred->cr_flags |= RPCAUTH_CRED_UPTODATE;
+        return 0;
+}
+
+static u32 *
+nul_validate(struct rpc_task *task, u32 *p)
+{
+        rpc_authflavor_t        flavor;
+        u32                     size;
+
+        flavor = ntohl(*p++);
+        if (flavor != RPC_AUTH_NULL) {
+                printk("RPC: bad verf flavor: %u\n", flavor);
+                return NULL;
+        }
+
+        size = ntohl(*p++);
+        if (size != 0) {
+                printk("RPC: bad verf size: %u\n", size);
+                return NULL;
+        }
+
+        return p;
+}
+
+struct rpc_authops authnull_ops = {
+        .owner          = THIS_MODULE,
+        .au_flavor      = RPC_AUTH_NULL,
+#ifdef RPC_DEBUG
+        .au_name        = "NULL",
+#endif
+        .create         = nul_create,
+        .destroy        = nul_destroy,
+        .lookup_cred    = nul_lookup_cred,
+};
+
+static
+struct rpc_auth null_auth = {
+        .au_cslack      = 4,
+        .au_rslack      = 2,
+        .au_ops         = &authnull_ops,
+};
+
+static
+struct rpc_credops      null_credops = {
+        .cr_name        = "AUTH_NULL",
+        .crdestroy      = nul_destroy_cred,
+        .crmatch        = nul_match,
+        .crmarshal      = nul_marshal,
+        .crrefresh      = nul_refresh,
+        .crvalidate     = nul_validate,
+};
+
+static
+struct rpc_cred null_cred = {
+        .cr_ops         = &null_credops,
+        .cr_count       = ATOMIC_INIT(1),
+        .cr_flags       = RPCAUTH_CRED_UPTODATE,
+#ifdef RPC_DEBUG
+        .cr_magic       = RPCAUTH_CRED_MAGIC,
+#endif
+};