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143 lines
4.8 KiB
143 lines
4.8 KiB
/**************************************************************************** |
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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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return -ENODEV; |
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} |
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return 0; |
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} |
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