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Per POSIX, aio_read() and aio_write() must return -1 and set errno to EINVAL when the request cannot be queued (aio_reqprio < 0, aio_offset < 0), and the error must also be retrievable via aio_error(). Conversely, when queuing fails with a bad file descriptor, the error belongs to the asynchronous operation: the functions must return 0 and report EBADF through aio_error(). - Merge the offset/reqprio checks and return ERROR with errno set, after storing the result in aio_result for aio_error(). - Drop the aio_fildes < 0 early return: a closed descriptor is now caught by fcntl()/aio_queue() and reported through aio_result with the function returning OK. - aio_error(): report -EINVAL (failed validation) through errno instead of returning it as an error value. Signed-off-by: tengshuangshuang <tengshuangshuang@xiaomi.com>
120 lines
4.1 KiB
C
120 lines
4.1 KiB
C
/****************************************************************************
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* libs/libc/aio/aio_error.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <aio.h>
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#include <assert.h>
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#include <errno.h>
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#ifdef CONFIG_FS_AIO
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: aio_error
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*
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* Description:
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* The aio_error() function returns the error status associated with the
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* aiocb structure referenced by the aiocbp argument. The error status for
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* an asynchronous I/O operation is the errno value that would be set by
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* the corresponding read(), write(), fdatasync(), or fsync() operation. If
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* the operation has not yet completed, then the error status will be equal
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* to EINPROGRESS.
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*
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* Input Parameters:
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* aiocbp - A pointer to an instance of struct aiocb
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*
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* Returned Value:
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* If the asynchronous I/O operation has completed successfully, then 0
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* will be returned. If the asynchronous operation has completed
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* unsuccessfully, then the error status, as described for read(),
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* write(), fdatasync(), and fsync(), will be returned. If the
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* asynchronous I/O operation has not yet completed, then EINPROGRESS will
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* be returned.
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*
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* The aio_error() function may fail if:
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*
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* EINVAL - The aiocbp argument does not refer to an asynchronous
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* operation whose return status has not yet been retrieved.
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*
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****************************************************************************/
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int aio_error(FAR const struct aiocb *aiocbp)
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{
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DEBUGASSERT(aiocbp);
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/* the aio_reqprio field must be large or equal than 0 */
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if (aiocbp->aio_reqprio < 0)
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{
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return EINVAL;
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}
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if (aiocbp->aio_offset < 0)
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{
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return -aiocbp->aio_result;
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}
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if (aiocbp->aio_result == -EINVAL)
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{
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set_errno(EINVAL);
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return ERROR;
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}
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if (aiocbp->aio_result < 0)
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{
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return -aiocbp->aio_result;
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}
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return OK;
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}
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#endif /* CONFIG_FS_AIO */
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