1 files changed, 72 insertions, 0 deletions

diff --git a/tools/lib/bpf/nlattr.h b/tools/lib/bpf/nlattr.h
new file mode 100644
index 000000000000..931a71f68f93
--- /dev/null
+++ b/tools/lib/bpf/nlattr.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+
+/*
+ * NETLINK      Netlink attributes
+ *
+ *      This library is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU Lesser General Public
+ *      License as published by the Free Software Foundation version 2.1
+ *      of the License.
+ *
+ * Copyright (c) 2003-2013 Thomas Graf <tgraf@suug.ch>
+ */
+
+#ifndef __NLATTR_H
+#define __NLATTR_H
+
+#include <stdint.h>
+#include <linux/netlink.h>
+/* avoid multiple definition of netlink features */
+#define __LINUX_NETLINK_H
+
+/**
+ * Standard attribute types to specify validation policy
+ */
+enum {
+        NLA_UNSPEC,     /**< Unspecified type, binary data chunk */
+        NLA_U8,         /**< 8 bit integer */
+        NLA_U16,        /**< 16 bit integer */
+        NLA_U32,        /**< 32 bit integer */
+        NLA_U64,        /**< 64 bit integer */
+        NLA_STRING,     /**< NUL terminated character string */
+        NLA_FLAG,       /**< Flag */
+        NLA_MSECS,      /**< Micro seconds (64bit) */
+        NLA_NESTED,     /**< Nested attributes */
+        __NLA_TYPE_MAX,
+};
+
+#define NLA_TYPE_MAX (__NLA_TYPE_MAX - 1)
+
+/**
+ * @ingroup attr
+ * Attribute validation policy.
+ *
+ * See section @core_doc{core_attr_parse,Attribute Parsing} for more details.
+ */
+struct nla_policy {
+        /** Type of attribute or NLA_UNSPEC */
+        uint16_t        type;
+
+        /** Minimal length of payload required */
+        uint16_t        minlen;
+
+        /** Maximal length of payload allowed */
+        uint16_t        maxlen;
+};
+
+/**
+ * @ingroup attr
+ * Iterate over a stream of attributes
+ * @arg pos     loop counter, set to current attribute
+ * @arg head    head of attribute stream
+ * @arg len     length of attribute stream
+ * @arg rem     initialized to len, holds bytes currently remaining in stream
+ */
+#define nla_for_each_attr(pos, head, len, rem) \
+        for (pos = head, rem = len; \
+             nla_ok(pos, rem); \
+             pos = nla_next(pos, &(rem)))
+
+int nla_dump_errormsg(struct nlmsghdr *nlh);
+
+#endif /* __NLATTR_H */