lib: fs: implement mounting filesystems; reading, writing from files

lib/libfs/interface.h

@@ -2,12 +2,17 @@
 #define _FS_INTERFACE_H_
 
 #include <mango/types.h>
+#include <xpc/buffer.h>
+#include <xpc/context.h>
+#include <xpc/endpoint.h>
+#include <xpc/string.h>
 
 struct msg_endpoint;
 
 extern kern_status_t fs_msg_open(
-	const struct msg_endpoint *sender,
-	const char *path,
+	xpc_context_t *ctx,
+	const xpc_endpoint_t *sender,
+	const xpc_string_t *path,
 	int flags,
 	int *out_err,
 	void *arg);
@@ -18,4 +23,13 @@ extern kern_status_t fs_msg_close(
 	int *out_err,
 	void *arg);
 
+extern kern_status_t fs_msg_read(
+	xpc_context_t *ctx,
+	const xpc_endpoint_t *sender,
+	size_t count,
+	int *out_err,
+	size_t *out_nr_read,
+	xpc_buffer_t *out_data,
+	void *arg);
+
 #endif