forked from Archive/PX4-Autopilot
151 lines
4.6 KiB
C
151 lines
4.6 KiB
C
/****************************************************************************
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* fs/nxffs/nxffs_ioctl.c
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* References: Linux/Documentation/filesystems/romfs.txt
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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 <string.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/fs/ioctl.h>
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#include <nuttx/mtd.h>
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#include "nxffs.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Types
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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: nxffs_ioctl
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*
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* Description:
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* Standard mountpoint ioctl method.
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*
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****************************************************************************/
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int nxffs_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
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{
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FAR struct nxffs_volume_s *volume;
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int ret;
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fvdbg("cmd: %d arg: %08lx\n", cmd, arg);
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/* Sanity checks */
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DEBUGASSERT(filep->f_priv != NULL && filep->f_inode != NULL);
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/* Recover the file system state from the open file */
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volume = filep->f_inode->i_private;
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DEBUGASSERT(volume != NULL);
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/* Get exclusive access to the volume. Note that the volume exclsem
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* protects the open file list.
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*/
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ret = sem_wait(&volume->exclsem);
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if (ret != OK)
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{
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ret = -errno;
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fdbg("sem_wait failed: %d\n", ret);
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goto errout;
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}
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/* Only a reformat and optimize commands are supported */
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if (cmd == FIOC_REFORMAT)
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{
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fvdbg("Reformat command\n");
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/* We cannot reformat the volume if there are any open inodes */
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if (volume->ofiles)
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{
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fdbg("Open files\n");
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ret = -EBUSY;
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goto errout_with_semaphore;
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}
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/* Re-format the volume -- all is lost */
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ret = nxffs_reformat(volume);
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}
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else if (cmd == FIOC_OPTIMIZE)
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{
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fvdbg("Optimize command\n");
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/* Pack the volume */
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ret = nxffs_pack(volume);
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}
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else
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{
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/* No other commands supported */
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ret = -ENOTTY;
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}
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errout_with_semaphore:
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sem_post(&volume->exclsem);
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errout:
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return ret;
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}
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