wireup linux/name_to_handle_at and name_to_handle_at syscalls

include/fcntl.h

@@ -155,6 +155,11 @@ int lockf(int, int, off_t);
 #define F_OWNER_PID 1
 #define F_OWNER_PGRP 2
 #define F_OWNER_GID 2
+struct file_handle {
+	unsigned handle_bytes;
+	int handle_type;
+	unsigned char f_handle[];
+};
 struct f_owner_ex {
 	int type;
 	pid_t pid;
@@ -170,6 +175,8 @@ struct f_owner_ex {
 #define SPLICE_F_GIFT 8
 int fallocate(int, int, off_t, off_t);
 #define fallocate64 fallocate
+int name_to_handle_at(int, const char *, struct file_handle *, int *, int);
+int open_by_handle_at(int, struct file_handle *, int);
 ssize_t readahead(int, off_t, size_t);
 int sync_file_range(int, off_t, off_t, unsigned);
 ssize_t vmsplice(int, const struct iovec *, size_t, unsigned);

src/linux/name_to_handle_at.c

@@ -0,0 +1,10 @@
+#define _GNU_SOURCE
+#include <fcntl.h>
+#include "syscall.h"
+
+int name_to_handle_at(int dirfd, const char *pathname,
+	struct file_handle *handle, int *mount_id, int flags)
+{
+	return syscall(SYS_name_to_handle_at, dirfd,
+		pathname, handle, mount_id, flags);
+}

src/linux/open_by_handle_at.c

@@ -0,0 +1,8 @@
+#define _GNU_SOURCE
+#include <fcntl.h>
+#include "syscall.h"
+
+int open_by_handle_at(int mount_fd, struct file_handle *handle, int flags)
+{
+	return syscall(SYS_open_by_handle_at, mount_fd, handle, flags);
+}