1 files changed, 44 insertions, 0 deletions

diff --git a/security/selinux/ss/symtab.c b/security/selinux/ss/symtab.c
new file mode 100644
index 000000000000..24a10d36d3b6
--- /dev/null
+++ b/security/selinux/ss/symtab.c
@@ -0,0 +1,44 @@
+/*
+ * Implementation of the symbol table type.
+ *
+ * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
+ */
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include "symtab.h"
+
+static unsigned int symhash(struct hashtab *h, void *key)
+{
+        char *p, *keyp;
+        unsigned int size;
+        unsigned int val;
+
+        val = 0;
+        keyp = key;
+        size = strlen(keyp);
+        for (p = keyp; (p - keyp) < size; p++)
+                val = (val << 4 | (val >> (8*sizeof(unsigned int)-4))) ^ (*p);
+        return val & (h->size - 1);
+}
+
+static int symcmp(struct hashtab *h, void *key1, void *key2)
+{
+        char *keyp1, *keyp2;
+
+        keyp1 = key1;
+        keyp2 = key2;
+        return strcmp(keyp1, keyp2);
+}
+
+
+int symtab_init(struct symtab *s, unsigned int size)
+{
+        s->table = hashtab_create(symhash, symcmp, size);
+        if (!s->table)
+                return -1;
+        s->nprim = 0;
+        return 0;
+}
+