selinux: Deprecate and schedule the removal of the the compat_net functionality

This patch is the first step towards removing the old "compat_net" code from
the kernel.  Secmark, the "compat_net" replacement was first introduced in
2.6.18 (September 2006) and the major Linux distributions with SELinux support
have transitioned to Secmark so it is time to start deprecating the "compat_net"
mechanism.  Testing a patched version of 2.6.28-rc6 with the initial release of
Fedora Core 5 did not show any problems when running in enforcing mode.

This patch adds an entry to the feature-removal-schedule.txt file and removes
the SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT configuration option, forcing
Secmark on by default although it can still be disabled at runtime.  The patch
also makes the Secmark permission checks "dynamic" in the sense that they are
only executed when Secmark is configured; this should help prevent problems
with older distributions that have not yet migrated to Secmark.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Acked-by: James Morris <jmorris@namei.org>

1 files changed, 0 insertions, 27 deletions

diff --git a/security/selinux/Kconfig b/security/selinux/Kconfig
index 26301dd651d..bca1b74a4a2 100644
--- a/security/selinux/Kconfig
+++ b/security/selinux/Kconfig
@@ -94,33 +94,6 @@ config SECURITY_SELINUX_CHECKREQPROT_VALUE
 
           If you are unsure how to answer this question, answer 1.
 
-config SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT
-        bool "NSA SELinux enable new secmark network controls by default"
-        depends on SECURITY_SELINUX
-        default n
-        help
-          This option determines whether the new secmark-based network
-          controls will be enabled by default.  If not, the old internal
-          per-packet controls will be enabled by default, preserving
-          old behavior.
-
-          If you enable the new controls, you will need updated
-          SELinux userspace libraries, tools and policy.  Typically,
-          your distribution will provide these and enable the new controls
-          in the kernel they also distribute.
-
-          Note that this option can be overridden at boot with the
-          selinux_compat_net parameter, and after boot via
-          /selinux/compat_net.  See Documentation/kernel-parameters.txt
-          for details on this parameter.
-
-          If you enable the new network controls, you will likely
-          also require the SECMARK and CONNSECMARK targets, as
-          well as any conntrack helpers for protocols which you
-          wish to control.
-
-          If you are unsure what to do here, select N.
-
 config SECURITY_SELINUX_POLICYDB_VERSION_MAX
         bool "NSA SELinux maximum supported policy format version"
         depends on SECURITY_SELINUX