[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/security/selinux/ss/sidtab.h b/src/kernel/linux/v4.14/security/selinux/ss/sidtab.h
new file mode 100644
index 0000000..a1a1d26
--- /dev/null
+++ b/src/kernel/linux/v4.14/security/selinux/ss/sidtab.h
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * A security identifier table (sidtab) is a hash table
+ * of security context structures indexed by SID value.
+ *
+ * Author : Stephen Smalley, <sds@tycho.nsa.gov>
+ */
+#ifndef _SS_SIDTAB_H_
+#define _SS_SIDTAB_H_
+
+#include "context.h"
+
+struct sidtab_node {
+ u32 sid; /* security identifier */
+ struct context context; /* security context structure */
+ struct sidtab_node *next;
+};
+
+#define SIDTAB_HASH_BITS 7
+#define SIDTAB_HASH_BUCKETS (1 << SIDTAB_HASH_BITS)
+#define SIDTAB_HASH_MASK (SIDTAB_HASH_BUCKETS-1)
+
+#define SIDTAB_SIZE SIDTAB_HASH_BUCKETS
+
+struct sidtab {
+ struct sidtab_node **htable;
+ unsigned int nel; /* number of elements */
+ unsigned int next_sid; /* next SID to allocate */
+ unsigned char shutdown;
+#define SIDTAB_CACHE_LEN 3
+ struct sidtab_node *cache[SIDTAB_CACHE_LEN];
+ spinlock_t lock;
+};
+
+int sidtab_init(struct sidtab *s);
+int sidtab_insert(struct sidtab *s, u32 sid, struct context *context);
+struct context *sidtab_search(struct sidtab *s, u32 sid);
+struct context *sidtab_search_force(struct sidtab *s, u32 sid);
+
+int sidtab_map(struct sidtab *s,
+ int (*apply) (u32 sid,
+ struct context *context,
+ void *args),
+ void *args);
+
+int sidtab_context_to_sid(struct sidtab *s,
+ struct context *context,
+ u32 *sid);
+
+void sidtab_hash_eval(struct sidtab *h, char *tag);
+void sidtab_destroy(struct sidtab *s);
+void sidtab_set(struct sidtab *dst, struct sidtab *src);
+void sidtab_shutdown(struct sidtab *s);
+
+#endif /* _SS_SIDTAB_H_ */
+
+