audit: documentation of audit= kernel parameter

Further documentation of the 3 possible kernel value of the audit
command line option.

Signed-off-by: Eric Paris <eparis@redhat.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index ab86766e28cb..e81e1d0d8d78 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -465,6 +465,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
         audit=          [KNL] Enable the audit sub-system
                         Format: { "0" | "1" } (0 = disabled, 1 = enabled)
+                        0 - kernel audit is disabled and can not be enabled
+                            until the next reboot
+                        unset - kernel audit is initialized but disabled and
+                            will be fully enabled by the userspace auditd.
+                        1 - kernel audit is initialized and partially enabled,
+                            storing at most audit_backlog_limit messages in
+                            RAM until it is fully enabled by the userspace
+                            auditd.
                         Default: unset
                         
         audit_backlog_limit= [KNL] Set the audit queue size limit.