smack: Add a new '-CIPSO' option to the network address label configuration
This patch adds a new special option '-CIPSO' to the Smack subsystem. When used
in the netlabel list, it means "use CIPSO networking". A use case is when your
local network speaks CIPSO and you want also to connect to the unlabeled
Internet. This patch also add some documentation describing that. The patch
also corrects an oops when setting a '' SMACK64 xattr to a file.
Signed-off-by: Etienne Basset <etienne.basset@numericable.fr>
Signed-off-by: Paul Moore <paul.moore@hp.com>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/security/smack/smack.h b/security/smack/smack.h
index 5e5a3bc..42ef313 100644
--- a/security/smack/smack.h
+++ b/security/smack/smack.h
@@ -132,6 +132,8 @@
#define XATTR_NAME_SMACKIPIN XATTR_SECURITY_PREFIX XATTR_SMACK_IPIN
#define XATTR_NAME_SMACKIPOUT XATTR_SECURITY_PREFIX XATTR_SMACK_IPOUT
+#define SMACK_CIPSO_OPTION "-CIPSO"
+
/*
* How communications on this socket are treated.
* Usually it's determined by the underlying netlabel code
@@ -199,6 +201,7 @@
extern int smack_cipso_direct;
extern char *smack_net_ambient;
extern char *smack_onlycap;
+extern const char *smack_cipso_option;
extern struct smack_known smack_known_floor;
extern struct smack_known smack_known_hat;