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libc: add aio_read2() and aio_write2() functions
as wrappers around lio_listio(LIO_READ/WRITE | LIO_FOFFSET, &iocb, 1); Suggested and reviewed by: jhb Discussed with: asomers Sponsored by: The FreeBSD Foundation MFC after: 1 week Differrential revision: https://reviews.freebsd.org/D43448
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@ -13,6 +13,8 @@ SRCS+= \
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_rand48.c \
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_spinlock_stub.c \
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_thread_init.c \
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aio_read2.c \
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aio_write2.c \
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alarm.c \
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arc4random.c \
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arc4random-compat.c \
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@ -455,6 +455,8 @@ FBSD_1.7 {
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};
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FBSD_1.8 {
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aio_read2;
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aio_write2;
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execvpe;
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};
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56
lib/libc/gen/aio_read2.c
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56
lib/libc/gen/aio_read2.c
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@ -0,0 +1,56 @@
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/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2024 The FreeBSD Foundation
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*
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* This software were developed by Konstantin Belousov <kib@FreeBSD.org>
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/aio.h>
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#include <errno.h>
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#include <stddef.h>
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int
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aio_read2(struct aiocb *iocb, int flags)
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{
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int error;
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if ((flags & ~(AIO_OP2_FOFFSET)) != 0) {
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errno = EINVAL;
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return (-1);
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}
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iocb->aio_lio_opcode = LIO_READ;
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if ((flags & AIO_OP2_FOFFSET) != 0)
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iocb->aio_lio_opcode |= LIO_FOFFSET;
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error = lio_listio(LIO_NOWAIT, &iocb, 1, NULL);
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if (error == -1 && errno == EIO) {
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error = aio_error(iocb);
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if (error != -1 && error != 0)
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errno = error;
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error = -1;
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}
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return (error);
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}
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56
lib/libc/gen/aio_write2.c
Normal file
56
lib/libc/gen/aio_write2.c
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@ -0,0 +1,56 @@
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/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2024 The FreeBSD Foundation
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*
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* This software were developed by Konstantin Belousov <kib@FreeBSD.org>
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/aio.h>
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#include <errno.h>
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#include <stddef.h>
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int
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aio_write2(struct aiocb *iocb, int flags)
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{
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int error;
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if ((flags & ~(AIO_OP2_FOFFSET)) != 0) {
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errno = EINVAL;
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return (-1);
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}
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iocb->aio_lio_opcode = LIO_WRITE;
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if ((flags & AIO_OP2_FOFFSET) != 0)
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iocb->aio_lio_opcode |= LIO_FOFFSET;
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error = lio_listio(LIO_NOWAIT, &iocb, 1, NULL);
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if (error == -1 && errno == EIO) {
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error = aio_error(iocb);
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if (error != -1 && error != 0)
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errno = error;
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error = -1;
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}
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return (error);
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}
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@ -55,6 +55,11 @@
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#define LIO_FOFFSET 0x40
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#endif
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/* aio_read2/aio_write2 flags */
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#if __BSD_VISIBLE
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#define AIO_OP2_FOFFSET 0x00000001
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#endif
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/*
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* LIO modes
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*/
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@ -275,6 +280,8 @@ int aio_mlock(struct aiocb *);
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#if __BSD_VISIBLE
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ssize_t aio_waitcomplete(struct aiocb **, struct timespec *);
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int aio_read2(struct aiocb *, int);
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int aio_write2(struct aiocb *, int);
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#endif
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int aio_fsync(int op, struct aiocb *aiocbp);
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