141 lines
4.7 KiB
C
Executable File
141 lines
4.7 KiB
C
Executable File
/****************************************************************************
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* fs/nfs/nfs_util.h
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 <sys/types.h>
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#include <sys/time.h>
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#include <stdint.h>
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#include <queue.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#include <assert.h>
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#include <debug.h>
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#include <nuttx/fs/dirent.h>
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#include "nfs_proto.h"
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#include "nfs_mount.h"
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#include "nfs_node.h"
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Private Variables
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****************************************************************************/
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/****************************************************************************
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* Public Variables
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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: nfs_semtake
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****************************************************************************/
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void nfs_semtake(struct nfsmount *nmp)
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{
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/* Take the semaphore (perhaps waiting) */
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while (sem_wait(&nmp->nm_sem) != 0)
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{
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/* The only case that an error should occur here is if
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* the wait was awakened by a signal.
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*/
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ASSERT(*get_errno_ptr() == EINTR);
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}
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}
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/****************************************************************************
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* Name: nfs_semgive
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****************************************************************************/
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void nfs_semgive(struct nfsmount *nmp)
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{
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sem_post(&nmp->nm_sem);
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}
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/****************************************************************************
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* Name: nfs_checkmount
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*
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* Desciption: Check if the mountpoint is still valid.
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*
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* The caller should hold the mountpoint semaphore
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*
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****************************************************************************/
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int nfs_checkmount(struct nfsmount *nmp)
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{
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struct nfsnode *file;
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/* If the nm_mounted flag is false, then we have already handled the loss
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* of the mount.
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*/
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DEBUGASSERT(nmp);
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if (!nmp->nm_mounted)
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{
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/* Make sure that this is flagged in every opened file */
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for (file = nmp->nm_head; file; file = file->n_next)
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{
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file->n_open = false;
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}
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}
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return -ENODEV;
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}
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