/**************************************************************************** * fs/nxffs/nxffs_ioctl.c * * Copyright (C) 2011, 2013, 2017 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * References: Linux/Documentation/filesystems/romfs.txt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include #include "nxffs.h" /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: nxffs_ioctl * * Description: * Standard mountpoint ioctl method. * ****************************************************************************/ int nxffs_ioctl(FAR struct file *filep, int cmd, unsigned long arg) { FAR struct nxffs_volume_s *volume; int ret; finfo("cmd: %d arg: %08lx\n", cmd, arg); /* Sanity checks */ DEBUGASSERT(filep->f_priv != NULL && filep->f_inode != NULL); /* Recover the file system state from the open file */ volume = filep->f_inode->i_private; DEBUGASSERT(volume != NULL); /* Get exclusive access to the volume. Note that the volume exclsem * protects the open file list. */ ret = nxsem_wait(&volume->exclsem); if (ret < 0) { ferr("ERROR: nxsem_wait failed: %d\n", ret); goto errout; } /* Only a reformat and optimize commands are supported */ if (cmd == FIOC_REFORMAT) { finfo("Reformat command\n"); /* We cannot reformat the volume if there are any open inodes */ if (volume->ofiles) { ferr("ERROR: Open files\n"); ret = -EBUSY; goto errout_with_semaphore; } /* Re-format the volume -- all is lost */ ret = nxffs_reformat(volume); } else if (cmd == FIOC_OPTIMIZE) { finfo("Optimize command\n"); /* Pack the volume */ ret = nxffs_pack(volume); } else { /* No other commands supported */ ret = -ENOTTY; } errout_with_semaphore: nxsem_post(&volume->exclsem); errout: return ret; }