test hash code

Author: RoyWFHuang

Makefile

@@ -1,6 +1,5 @@
 obj-m += simplefs.o
-simplefs-objs := fs.o super.o inode.o file.o dir.o extent.o
-
+simplefs-objs := fs.o super.o inode.o file.o dir.o extent.o symlink.o hash.o
 KDIR ?= /lib/modules/$(shell uname -r)/build
 
 MKFS = mkfs.simplefs

hash.c

@@ -0,0 +1,13 @@
+#include <linux/types.h>
+#include "simplefs.h"
+
+uint64_t fnv1a_64(const char *str)
+{
+    uint64_t h = 0xcbf29ce484222325ULL;
+    while (*str) {
+        h ^= (unsigned char)(*str++);
+        h *= 0x100000001b3ULL;
+    }
+    return h;
+}
+