selinux: convert range transition list to a hashtab
Per https://bugzilla.redhat.com/show_bug.cgi?id=548145
there are sufficient range transition rules in modern (Fedora) policy to
make mls_compute_sid a significant factor on the shmem file setup path
due to the length of the range_tr list. Replace the simple range_tr
list with a hashtab inside the security server to help mitigate this
problem.
Signed-off-by: Stephen D. Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/security/selinux/ss/policydb.h b/security/selinux/ss/policydb.h
index cdcc570..193736b 100644
--- a/security/selinux/ss/policydb.h
+++ b/security/selinux/ss/policydb.h
@@ -113,8 +113,6 @@
u32 source_type;
u32 target_type;
u32 target_class;
- struct mls_range target_range;
- struct range_trans *next;
};
/* Boolean data type */
@@ -240,8 +238,8 @@
fixed labeling behavior. */
struct genfs *genfs;
- /* range transitions */
- struct range_trans *range_tr;
+ /* range transitions table (range_trans_key -> mls_range) */
+ struct hashtab *range_tr;
/* type -> attribute reverse mapping */
struct ebitmap *type_attr_map;
