1 files changed, 58 insertions, 0 deletions
diff --git a/lib/libc/gen/aio_read2.c b/lib/libc/gen/aio_read2.c
new file mode 100644
index 000000000000..a5186d509b26
--- /dev/null
+++ b/lib/libc/gen/aio_read2.c
@@ -0,0 +1,58 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2024 The FreeBSD Foundation
+ *
+ * This software were developed by Konstantin Belousov <kib@FreeBSD.org>
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/aio.h>
+#include <errno.h>
+#include <stddef.h>
+
+int
+aio_read2(struct aiocb *iocb, int flags)
+{
+	int error;
+
+	if ((flags & ~(AIO_OP2_FOFFSET | AIO_OP2_VECTORED)) != 0) {
+		errno = EINVAL;
+		return (-1);
+	}
+	iocb->aio_lio_opcode = LIO_READ;
+	if ((flags & AIO_OP2_FOFFSET) != 0)
+		iocb->aio_lio_opcode |= LIO_FOFFSET;
+	if ((flags & AIO_OP2_VECTORED) != 0)
+		iocb->aio_lio_opcode |= LIO_VECTORED;
+
+	error = lio_listio(LIO_NOWAIT, &iocb, 1, NULL);
+	if (error == -1 && errno == EIO) {
+		error = aio_error(iocb);
+		if (error != -1 && error != 0)
+			errno = error;
+		error = -1;
+	}
+	return (error);
+}