Transfer authorization to manager signature authentication, reducing the possibility of key authentication leakage

kernel/.gitignore

@@ -19,4 +19,9 @@
 # kernel patch module
 *.kpm
 
-kpimg
+kpimg
+
+*.img
+kernel
+kernel-b
+*.bat

kernel/linux/include/linux/fs.h

@@ -357,6 +357,24 @@ static inline loff_t vfs_llseek(struct file *file, loff_t offset, int whence)
     kfunc_direct_call(vfs_llseek, file, offset, whence);
 }
 
+/* Directory iteration context (kernel 3.11+).
+ * Actor signature: int return (4.x) or bool return (5.0+) — both are ABI-compatible
+ * on arm64 for 0/1 values, so we use the 5.0+ bool form to satisfy the compiler.
+ */
+struct dir_context {
+    bool (*actor)(struct dir_context *, const char *, int, loff_t, u64, unsigned int);
+    loff_t pos;
+};
+
+extern int kfunc_def(iterate_dir)(struct file *, struct dir_context *);
+
+static inline int iterate_dir(struct file *file, struct dir_context *ctx)
+{
+    kfunc_call(iterate_dir, file, ctx);
+    kfunc_not_found();
+    return 0; /* symbol not resolved; caller checks result via its context */
+}
+
 static inline void putname(struct filename *name)
 {
     kfunc_direct_call_void(putname, name);