SELinux : implementation of SELinux translator

The patch implement a part of SELinux translator to support setting
SELinux contexts on files in a glusterfs volume.

URL: https://github.com/gluster/glusterfs-specs/blob/master/accepted/SELinux-client-support.md

Change-Id: Id8916bd8e064ccf74ba86225ead95f86dc5a1a25
BUG: 1318100
Fixes : #55
Signed-off-by: Manikandan Selvaganesh <mselvaga@redhat.com>
Signed-off-by: Jiffin Tony Thottan <jthottan@redhat.com>
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: https://review.gluster.org/13762
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Manikandan Selvaganesh <manikandancs333@gmail.com>
Reviewed-by: Atin Mukherjee <amukherj@redhat.com>

1 files changed, 98 insertions, 0 deletions

diff --git a/xlators/features/selinux/src/selinux-messages.h b/xlators/features/selinux/src/selinux-messages.h
new file mode 100644
index 00000000000..a498dc21471
--- /dev/null
+++ b/xlators/features/selinux/src/selinux-messages.h
@@ -0,0 +1,98 @@
+/*
+  Copyright (c) 2017 Red Hat, Inc. <http://www.redhat.com>
+  This file is part of GlusterFS.
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+#ifndef _SELINUX_MESSAGES_H__
+#define _SELINUX_MESSAGES_H__
+
+#include "glfs-message-id.h"
+
+/*! \file selinux-messages.h
+ *  \brief Selinux log-message IDs and their descriptions
+ */
+
+/* NOTE: Rules for message additions
+ * 1) Each instance of a message is _better_ left with a unique message ID, even
+ *    if the message format is the same. Reasoning is that, if the message
+ *    format needs to change in one instance, the other instances are not
+ *    impacted or the new change does not change the ID of the instance being
+ *    modified.
+ * 2) Addition of a message,
+ *       - Should increment the GLFS_NUM_MESSAGES
+ *       - Append to the list of messages defined, towards the end
+ *       - Retain macro naming as glfs_msg_X (for readability across developers)
+ * NOTE: Rules for message format modifications
+ * 3) Check acorss the code if the message ID macro in question is reused
+ *    anywhere. If reused then then the modifications should ensure correctness
+ *    everywhere, or needs a new message ID as (1) above was not adhered to. If
+ *    not used anywhere, proceed with the required modification.
+ * NOTE: Rules for message deletion
+ * 4) Check (3) and if used anywhere else, then cannot be deleted. If not used
+ *    anywhere, then can be deleted, but will leave a hole by design, as
+ *    addition rules specify modification to the end of the list and not filling
+ *    holes.
+ */
+
+#define GLFS_SL_BASE                GLFS_MSGID_COMP_SL
+#define GLFS_SL_NUM_MESSAGES        5
+#define GLFS_SL_MSGID_END           (GLFS_SL_BASE + GLFS_NUM_MESSAGES + 1)
+/* Messages with message IDs */
+#define glfs_msg_start_x GLFS_SL_BASE, "Invalid: Start of messages"
+/*------------*/
+
+#define SL_MSG_INVALID_VOLFILE          (GLFS_SL_BASE + 1)
+
+/*!
+ * @messageid
+ * @diagnosis
+ * @recommendedaction
+ *
+ */
+
+#define SL_MSG_ENOMEM                   (GLFS_SL_BASE + 2)
+
+/*!
+ * @messageid
+ * @diagnosis
+ * @recommendedaction
+ *
+ */
+
+#define SL_MSG_MEM_ACCT_INIT_FAILED     (GLFS_SL_BASE + 3)
+
+/*!
+ * @messageid
+ * @diagnosis
+ * @recommendedaction
+ *
+ */
+
+#define SL_MSG_SELINUX_GLUSTER_XATTR_MISSING (GLFS_SL_BASE + 4)
+
+/*!
+ * @messageid
+ * @diagnosis
+ * @recommendedaction
+ *
+ */
+
+#define SL_MSG_SELINUX_XATTR_MISSING    (GLFS_SL_BASE + 5)
+
+/*!
+ * @messageid
+ * @diagnosis
+ * @recommendedaction
+ *
+ */
+
+/*-----------*/
+#define glfs_msg_end_x GLFS_MSGID_END, "Invalid: End of messages"
+
+#endif /*_SELINUX_MESSAGES_H */
+