SELinux: turn mount options strings into defines

Convert the strings used for mount options into #defines rather than
retyping the string throughout the SELinux code.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>

2 files changed, 13 insertions, 8 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 9d002f8484a3..93c809a6e4fa 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -321,10 +321,10 @@ enum {
 };
 
 static match_table_t tokens = {
-        {Opt_context, "context=%s"},
-        {Opt_fscontext, "fscontext=%s"},
-        {Opt_defcontext, "defcontext=%s"},
-        {Opt_rootcontext, "rootcontext=%s"},
+        {Opt_context, CONTEXT_STR "%s"},
+        {Opt_fscontext, FSCONTEXT_STR "%s"},
+        {Opt_defcontext, DEFCONTEXT_STR "%s"},
+        {Opt_rootcontext, ROOTCONTEXT_STR "%s"},
         {Opt_error, NULL},
 };
 
@@ -2287,10 +2287,10 @@ static inline int match_prefix(char *prefix, int plen, char *option, int olen)
 
 static inline int selinux_option(char *option, int len)
 {
-        return (match_prefix("context=", sizeof("context=")-1, option, len) ||
-                match_prefix("fscontext=", sizeof("fscontext=")-1, option, len) ||
-                match_prefix("defcontext=", sizeof("defcontext=")-1, option, len) ||
-                match_prefix("rootcontext=", sizeof("rootcontext=")-1, option, len));
+        return (match_prefix(CONTEXT_STR, sizeof(CONTEXT_STR)-1, option, len) ||
+                match_prefix(FSCONTEXT_STR, sizeof(FSCONTEXT_STR)-1, option, len) ||
+                match_prefix(DEFCONTEXT_STR, sizeof(DEFCONTEXT_STR)-1, option, len) ||
+                match_prefix(ROOTCONTEXT_STR, sizeof(ROOTCONTEXT_STR)-1, option, len));
 }
 
 static inline void take_option(char **to, char *from, int *first, int len)
diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
index dd70aa084637..bc823ef70a12 100644
--- a/security/selinux/include/security.h
+++ b/security/selinux/include/security.h
@@ -41,6 +41,11 @@
 #define ROOTCONTEXT_MNT 0x04
 #define DEFCONTEXT_MNT  0x08
 
+#define CONTEXT_STR     "context="
+#define FSCONTEXT_STR   "fscontext="
+#define ROOTCONTEXT_STR "rootcontext="
+#define DEFCONTEXT_STR  "defcontext="
+
 struct netlbl_lsm_secattr;
 
 extern int selinux_enabled;