SELinux: move SELINUX_MAGIC into magic.h

The selinuxfs superblock magic is used inside the IMA code, but is being
defined in two places and could someday get out of sync.  This patch moves the
declaration into magic.h so it is only done once.

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>

3 files changed, 5 insertions, 7 deletions

diff --git a/include/linux/magic.h b/include/linux/magic.h
index 5b4e28bcb788..927138cf3050 100644
--- a/include/linux/magic.h
+++ b/include/linux/magic.h
@@ -9,6 +9,7 @@
 #define DEBUGFS_MAGIC          0x64626720
 #define SYSFS_MAGIC             0x62656572
 #define SECURITYFS_MAGIC        0x73636673
+#define SELINUX_MAGIC           0xf97cff8c
 #define TMPFS_MAGIC             0x01021994
 #define SQUASHFS_MAGIC          0x73717368
 #define EFS_SUPER_MAGIC         0x414A53
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index dec6dcb1c8de..31d677f7c65f 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -49,14 +49,12 @@ struct ima_measure_rule_entry {
  * written in terms of .action, .func, .mask, .fsmagic, and .uid
  */
 static struct ima_measure_rule_entry default_rules[] = {
-        {.action = DONT_MEASURE,.fsmagic = PROC_SUPER_MAGIC,
-         .flags = IMA_FSMAGIC},
+        {.action = DONT_MEASURE,.fsmagic = PROC_SUPER_MAGIC,.flags = IMA_FSMAGIC},
         {.action = DONT_MEASURE,.fsmagic = SYSFS_MAGIC,.flags = IMA_FSMAGIC},
         {.action = DONT_MEASURE,.fsmagic = DEBUGFS_MAGIC,.flags = IMA_FSMAGIC},
         {.action = DONT_MEASURE,.fsmagic = TMPFS_MAGIC,.flags = IMA_FSMAGIC},
-        {.action = DONT_MEASURE,.fsmagic = SECURITYFS_MAGIC,
-         .flags = IMA_FSMAGIC},
-        {.action = DONT_MEASURE,.fsmagic = 0xF97CFF8C,.flags = IMA_FSMAGIC},
+        {.action = DONT_MEASURE,.fsmagic = SECURITYFS_MAGIC,.flags = IMA_FSMAGIC},
+        {.action = DONT_MEASURE,.fsmagic = SELINUX_MAGIC,.flags = IMA_FSMAGIC},
         {.action = MEASURE,.func = FILE_MMAP,.mask = MAY_EXEC,
          .flags = IMA_FUNC | IMA_MASK},
         {.action = MEASURE,.func = BPRM_CHECK,.mask = MAY_EXEC,
diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
index a7be3f01fb08..ca835795a8b3 100644
--- a/security/selinux/include/security.h
+++ b/security/selinux/include/security.h
@@ -8,14 +8,13 @@
 #ifndef _SELINUX_SECURITY_H_
 #define _SELINUX_SECURITY_H_
 
+#include <linux/magic.h>
 #include "flask.h"
 
 #define SECSID_NULL                     0x00000000 /* unspecified SID */
 #define SECSID_WILD                     0xffffffff /* wildcard SID */
 #define SECCLASS_NULL                   0x0000 /* no class */
 
-#define SELINUX_MAGIC 0xf97cff8c
-
 /* Identify specific policy version changes */
 #define POLICYDB_VERSION_BASE           15
 #define POLICYDB_VERSION_BOOL           16