This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / net / netlabel / netlabel_user.c

diff --git a/net/netlabel/netlabel_user.c b/net/netlabel/netlabel_user.c
new file mode 100644 (file)
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+++ b/net/netlabel/netlabel_user.c
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+/*
+ * NetLabel NETLINK Interface
+ *
+ * This file defines the NETLINK interface for the NetLabel system.  The
+ * NetLabel system manages static and dynamic label mappings for network
+ * protocols such as CIPSO and RIPSO.
+ *
+ * Author: Paul Moore <paul.moore@hp.com>
+ *
+ */
+
+/*
+ * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
+ *
+ * This program is free software;  you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program;  if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/socket.h>
+#include <linux/audit.h>
+#include <linux/tty.h>
+#include <linux/security.h>
+#include <net/sock.h>
+#include <net/netlink.h>
+#include <net/genetlink.h>
+#include <net/netlabel.h>
+#include <asm/bug.h>
+
+#include "netlabel_mgmt.h"
+#include "netlabel_unlabeled.h"
+#include "netlabel_cipso_v4.h"
+#include "netlabel_user.h"
+
+/* do not do any auditing if audit_enabled == 0, see kernel/audit.c for
+ * details */
+extern int audit_enabled;
+
+/*
+ * NetLabel NETLINK Setup Functions
+ */
+
+/**
+ * netlbl_netlink_init - Initialize the NETLINK communication channel
+ *
+ * Description:
+ * Call out to the NetLabel components so they can register their families and
+ * commands with the Generic NETLINK mechanism.  Returns zero on success and
+ * non-zero on failure.
+ *
+ */
+int netlbl_netlink_init(void)
+{
+       int ret_val;
+
+       ret_val = netlbl_mgmt_genl_init();
+       if (ret_val != 0)
+               return ret_val;
+
+       ret_val = netlbl_cipsov4_genl_init();
+       if (ret_val != 0)
+               return ret_val;
+
+       ret_val = netlbl_unlabel_genl_init();
+       if (ret_val != 0)
+               return ret_val;
+
+       return 0;
+}
+
+/*
+ * NetLabel Audit Functions
+ */
+
+/**
+ * netlbl_audit_start_common - Start an audit message
+ * @type: audit message type
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Start an audit message using the type specified in @type and fill the audit
+ * message with some fields common to all NetLabel audit messages.  Returns
+ * a pointer to the audit buffer on success, NULL on failure.
+ *
+ */
+struct audit_buffer *netlbl_audit_start_common(int type,
+                                              struct netlbl_audit *audit_info)
+{
+       struct audit_context *audit_ctx = current->audit_context;
+       struct audit_buffer *audit_buf;
+       char *secctx;
+       u32 secctx_len;
+
+       if (audit_enabled == 0)
+               return NULL;
+
+       audit_buf = audit_log_start(audit_ctx, GFP_ATOMIC, type);
+       if (audit_buf == NULL)
+               return NULL;
+
+       audit_log_format(audit_buf, "netlabel: auid=%u", audit_info->loginuid);
+
+       if (audit_info->secid != 0 &&
+           security_secid_to_secctx(audit_info->secid,
+                                    &secctx,
+                                    &secctx_len) == 0)
+               audit_log_format(audit_buf, " subj=%s", secctx);
+
+       return audit_buf;
+}