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150 lines
4.6 KiB
150 lines
4.6 KiB
/**************************************************************************** |
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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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