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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * iov.c - helpers for using (partial) iovecs.
+ *
+ * Copyrigh Red Hat
+ * Author: Laurent Vivier <lvivier@redhat.com>
+ *
+ * This file also contains code originally from QEMU include/qemu/iov.h:
+ *
+ * Author(s):
+ * Amit Shah <amit.shah@redhat.com>
+ * Michael Tokarev <mjt@tls.msk.ru>
+ */
+
+#ifndef IOVEC_H
+#define IOVEC_H
+
+#include <unistd.h>
+#include <string.h>
+
+size_t iov_from_buf(const struct iovec *iov, size_t iov_cnt,
+ size_t offset, const void *buf, size_t bytes);
+size_t iov_to_buf(const struct iovec *iov, size_t iov_cnt,
+ size_t offset, void *buf, size_t bytes);
+size_t iov_size(const struct iovec *iov, size_t iov_cnt);
+unsigned iov_copy(struct iovec *dst_iov, size_t dst_iov_cnt,
+ const struct iovec *iov, size_t iov_cnt,
+ size_t offset, size_t bytes);
+#endif /* IOVEC_H */