93d03d0418
This commit adds VFS docmentation, and details about the VFS interface. Signed-off-by: Saurav Pal <resyfer.dev@gmail.com>
103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/****************************************************************************
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* fs/vfs/fs_syncfs.c
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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 <nuttx/cancelpt.h>
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#include <nuttx/fs/fs.h>
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#include <errno.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: file_syncfs
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*
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* Description:
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* Equivalent to the standard syncfs() function except that is accepts a
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* struct file instance instead of a fd descriptor and it does not set
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* the errno variable
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*
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****************************************************************************/
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int file_syncfs(FAR struct file *filep)
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{
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FAR struct inode *inode = filep->f_inode;
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if (inode != NULL)
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{
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#ifndef CONFIG_DISABLE_MOUNTPOINT
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if (INODE_IS_MOUNTPT(inode) && inode->u.i_mops &&
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inode->u.i_mops->syncfs)
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{
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return inode->u.i_mops->syncfs(inode);
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}
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#endif /* !CONFIG_DISABLE_MOUNTPOINT */
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}
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return -EBADF;
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}
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/****************************************************************************
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* Name: syncfs
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*
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* Description:
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* syncfs() is like sync(), but synchronizes just the filesystem
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* containing file referred to by the open file descriptor fd.
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*
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* Returned Value:
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* syncfs() returns 0 on success; on error, it returns -1 and sets
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* errno to indicate the error.
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*
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* Assumptions:
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*
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****************************************************************************/
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int syncfs(int fd)
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{
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FAR struct file *filep;
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int ret;
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enter_cancellation_point();
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ret = fs_getfilep(fd, &filep);
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if (ret == OK)
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{
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DEBUGASSERT(filep != NULL);
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ret = file_syncfs(filep);
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}
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leave_cancellation_point();
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if (ret < 0)
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{
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set_errno(-ret);
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ret = ERROR;
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}
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return ret;
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}
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