New helper: deactivate_locked_super()

[safe/jmp/linux-2.6] / include / linux / securebits.h

diff --git a/include/linux/securebits.h b/include/linux/securebits.h
index c1f19db..d2c5ed8 100644 (file)
--- a/include/linux/securebits.h
+++ b/include/linux/securebits.h
@@ -7,14 +7,15 @@
    inheritance of root-permissions and suid-root executable under
    compatibility mode. We raise the effective and inheritable bitmasks
    *of the executable file* if the effective uid of the new process is
-   0. If the real uid is 0, we raise the inheritable bitmask of the
+   0. If the real uid is 0, we raise the effective (legacy) bit of the
    executable file. */
 #define SECURE_NOROOT                  0
 #define SECURE_NOROOT_LOCKED           1  /* make bit-0 immutable */
 
-/* When set, setuid to/from uid 0 does not trigger capability-"fixes"
-   to be compatible with old programs relying on set*uid to loose
-   privileges. When unset, setuid doesn't change privileges. */
+/* When set, setuid to/from uid 0 does not trigger capability-"fixup".
+   When unset, to provide compatiblility with old programs relying on
+   set*uid to gain/lose privilege, transitions to/from uid 0 cause
+   capabilities to be gained/lost. */
 #define SECURE_NO_SETUID_FIXUP         2
 #define SECURE_NO_SETUID_FIXUP_LOCKED  3  /* make bit-2 immutable */
 
@@ -26,12 +27,12 @@
 #define SECURE_KEEP_CAPS               4
 #define SECURE_KEEP_CAPS_LOCKED                5  /* make bit-4 immutable */
 
-/* Each securesetting is implemented using two bits. One bit specify
+/* Each securesetting is implemented using two bits. One bit specifies
    whether the setting is on or off. The other bit specify whether the
-   setting is fixed or not. A setting which is fixed cannot be changed
-   from user-level. */
+   setting is locked or not. A setting which is locked cannot be
+   changed from user-level. */
 #define issecure_mask(X)       (1 << (X))
-#define issecure(X)            (issecure_mask(X) & current->securebits)
+#define issecure(X)            (issecure_mask(X) & current_cred_xxx(securebits))
 
 #define SECURE_ALL_BITS                (issecure_mask(SECURE_NOROOT) | \
                                 issecure_mask(SECURE_NO_SETUID_FIXUP) | \