land lustre part of b_hd_sec on HEAD.

[fs/lustre-release.git] / lustre / sec / sec_null.c

diff --git a/lustre/sec/sec_null.c b/lustre/sec/sec_null.c
new file mode 100644 (file)
index 0000000..3d9d908
--- /dev/null
+++ b/lustre/sec/sec_null.c
@@ -0,0 +1,195 @@
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * Copyright (C) 2004 Cluster File Systems, Inc.
+ *
+ *   This file is part of Lustre, http://www.lustre.org.
+ *
+ *   Lustre is free software; you can redistribute it and/or
+ *   modify it under the terms of version 2 of the GNU General Public
+ *   License as published by the Free Software Foundation.
+ *
+ *   Lustre is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Lustre; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef EXPORT_SYMTAB
+# define EXPORT_SYMTAB
+#endif
+#define DEBUG_SUBSYSTEM S_SEC
+#ifdef __KERNEL__
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#else
+#include <liblustre.h>
+#endif
+
+#include <libcfs/kp30.h>
+#include <linux/obd_support.h>
+#include <linux/lustre_net.h>
+#include <linux/lustre_sec.h>
+
+static int null_cred_refresh(struct ptlrpc_cred *cred)
+{
+        ENTRY;
+        LASSERT(cred->pc_flags & PTLRPC_CRED_UPTODATE);
+        RETURN(0);
+}
+
+static int null_cred_match(struct ptlrpc_cred *cred,
+                           struct ptlrpc_request *req,
+                           struct vfs_cred *vcred)
+{
+        ENTRY;
+        RETURN(1);
+}
+
+static int null_cred_sign(struct ptlrpc_cred *cred,
+                          struct ptlrpc_request *req)
+{
+        struct ptlrpcs_wire_hdr *hdr = buf_to_sec_hdr(req->rq_reqbuf);
+        ENTRY;
+
+        hdr->sec_len = cpu_to_le32(0);
+
+        RETURN(0);
+}
+
+static int null_cred_verify(struct ptlrpc_cred *cred,
+                            struct ptlrpc_request *req)
+{
+        struct ptlrpcs_wire_hdr *hdr = buf_to_sec_hdr(req->rq_repbuf);
+
+        if (hdr->sec_len != 0) {
+                CERROR("security payload %u not zero\n", hdr->sec_len);
+                RETURN(-EPROTO);
+        }
+
+        req->rq_repmsg = (struct lustre_msg *)(hdr + 1);
+        req->rq_replen = hdr->msg_len;
+        CDEBUG(D_SEC, "set repmsg at %p, len %d\n",
+               req->rq_repmsg, req->rq_replen);
+
+        RETURN(0);
+}
+
+static void null_cred_destroy(struct ptlrpc_cred *cred)
+{
+        LASSERT(!atomic_read(&cred->pc_refcount));
+
+        CDEBUG(D_SEC, "NULL_SEC: destroy cred %p\n", cred);
+        OBD_FREE(cred, sizeof(*cred));
+}
+
+static struct ptlrpc_credops null_credops = {
+        .refresh        = null_cred_refresh,
+        .match          = null_cred_match,
+        .sign           = null_cred_sign,
+        .verify         = null_cred_verify,
+        .destroy        = null_cred_destroy,
+};
+
+static
+struct ptlrpc_sec* null_create_sec(ptlrpcs_flavor_t *flavor,
+                                   const char *pipe_dir,
+                                   void *pipe_data)
+{
+        struct ptlrpc_sec *sec;
+        ENTRY;
+
+        LASSERT(flavor->flavor == PTLRPC_SEC_NULL);
+
+        OBD_ALLOC(sec, sizeof(*sec));
+        if (!sec)
+                RETURN(ERR_PTR(-ENOMEM));
+
+        sec->ps_sectype = PTLRPC_SEC_TYPE_NONE;
+        sec->ps_expire = (-1UL >> 1); /* never expire */
+        sec->ps_nextgc = (-1UL >> 1);
+        sec->ps_flags = 0;
+
+        CDEBUG(D_SEC, "Create NULL security module at %p\n", sec);
+        RETURN(sec);
+}
+
+static
+void null_destroy_sec(struct ptlrpc_sec *sec)
+{
+        ENTRY;
+
+        CDEBUG(D_SEC, "Destroy NULL security module at %p\n", sec);
+
+        LASSERT(!atomic_read(&sec->ps_refcount));
+        OBD_FREE(sec, sizeof(*sec));
+        EXIT;
+}
+
+static
+struct ptlrpc_cred* null_create_cred(struct ptlrpc_sec *sec,
+                                     struct ptlrpc_request *req,
+                                     struct vfs_cred *vcred)
+{
+        struct ptlrpc_cred *cred;
+        ENTRY;
+
+        OBD_ALLOC(cred, sizeof(*cred));
+        if (!cred)
+                RETURN(NULL);
+
+        INIT_LIST_HEAD(&cred->pc_hash);
+        atomic_set(&cred->pc_refcount, 0);
+        cred->pc_sec = sec;
+        cred->pc_ops = &null_credops;
+        cred->pc_req = req;
+        cred->pc_expire = (-1UL >> 1); /* never expire */
+        cred->pc_flags = PTLRPC_CRED_UPTODATE;
+        cred->pc_pag = vcred->vc_pag;
+        cred->pc_uid = vcred->vc_uid;
+        CDEBUG(D_SEC, "create a null cred at %p("LPU64"/%u)\n",
+               cred, vcred->vc_pag, vcred->vc_uid);
+
+        RETURN(cred);
+}
+
+static struct ptlrpc_secops null_secops = {
+        .create_sec     = null_create_sec,
+        .destroy_sec    = null_destroy_sec,
+        .create_cred    = null_create_cred,
+};
+
+static struct ptlrpc_sec_type null_type = {
+        .pst_owner      = THIS_MODULE,
+        .pst_name       = "NULL_SEC",
+        .pst_inst       = ATOMIC_INIT(0),
+        .pst_flavor     = {PTLRPC_SEC_NULL, 0},
+        .pst_ops        = &null_secops,
+};
+
+int ptlrpcs_null_init(void)
+{
+        int rc;
+
+        rc = ptlrpcs_register(&null_type);
+        if (rc)
+                CERROR("failed to register NULL security: %d\n", rc);
+
+        return rc;
+}
+
+int ptlrpcs_null_exit(void)
+{
+        int rc;
+
+        rc = ptlrpcs_unregister(&null_type);
+        if (rc)
+                CERROR("cannot unregister NULL security: %d\n", rc);
+
+        return rc;
+}