diff options
Diffstat (limited to 'nuttx/fs/fs_umount.c')
| -rw-r--r-- | nuttx/fs/fs_umount.c | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/nuttx/fs/fs_umount.c b/nuttx/fs/fs_umount.c deleted file mode 100644 index 5bf44e4f7..000000000 --- a/nuttx/fs/fs_umount.c +++ /dev/null @@ -1,206 +0,0 @@ -/**************************************************************************** - * fs/fs_umount.c - * - * Copyright (C) 2007-2009 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * 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 <nuttx/config.h> - -#include <sys/mount.h> -#include <errno.h> -#include <nuttx/fs/fs.h> - -#include "fs_internal.h" - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/**************************************************************************** - * Private Variables - ****************************************************************************/ - -/**************************************************************************** - * Public Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: umount - * - * Description: - * umount() detaches the filesystem mounted at the path specified by - * 'target.' - * - * Return: - * Zero is returned on success; -1 is returned on an error and errno is - * set appropriately: - * - * EACCES A component of a path was not searchable or mounting a read-only - * filesystem was attempted without giving the MS_RDONLY flag. - * EBUSY The target could not be unmounted because it is busy. - * EFAULT The pointer argument points outside the user address space. - * - ****************************************************************************/ - -int umount(const char *target) -{ - FAR struct inode *mountpt_inode; - FAR struct inode *blkdrvr_inode = NULL; - int errcode = OK; - int status; - - /* Verify required pointer arguments */ - - if (!target) - { - errcode = EFAULT; - goto errout; - } - - /* Find the mountpt */ - - mountpt_inode = inode_find(target, NULL); - if (!mountpt_inode) - { - errcode = ENOENT; - goto errout; - } - - /* Verify that the inode is a mountpoint */ - - if (!INODE_IS_MOUNTPT(mountpt_inode)) - { - errcode = EINVAL; - goto errout_with_mountpt; - } - - /* Unbind the block driver from the file system (destroying any fs - * private data. - */ - - if (!mountpt_inode->u.i_mops->unbind) - { - /* The filesystem does not support the unbind operation ??? */ - - errcode = EINVAL; - goto errout_with_mountpt; - } - - /* The unbind method returns the number of references to the - * filesystem (i.e., open files), zero if the unbind was - * performed, or a negated error code on a failure. - */ - - inode_semtake(); /* Hold the semaphore through the unbind logic */ - status = mountpt_inode->u.i_mops->unbind( mountpt_inode->i_private, &blkdrvr_inode); - if (status < 0) - { - /* The inode is unhappy with the blkdrvr for some reason */ - - errcode = -status; - goto errout_with_semaphore; - } - else if (status > 0) - { - errcode = EBUSY; - goto errout_with_semaphore; - } - - /* Successfully unbound */ - - mountpt_inode->i_private = NULL; - - /* Successfully unbound, remove the mountpoint inode from - * the inode tree. The inode will not be deleted yet because - * there is still at least reference on it (from the mount) - */ - - status = inode_remove(target); - inode_semgive(); - - /* The return value of -EBUSY is normal (in fact, it should - * not be OK) - */ - - if (status != OK && status != -EBUSY) - { - errcode = -status; - goto errout_with_mountpt; - } - - /* Release the mountpoint inode and any block driver inode - * returned by the file system unbind above. This should cause - * the inode to be deleted (unless there are other references) - */ - - inode_release(mountpt_inode); - - /* Did the unbind method return a contained block driver */ - - if (blkdrvr_inode) - { - inode_release(blkdrvr_inode); - } - - return OK; - - /* A lot of goto's! But they make the error handling much simpler */ - -errout_with_semaphore: - inode_semgive(); -errout_with_mountpt: - inode_release(mountpt_inode); - if (blkdrvr_inode) - { - inode_release(blkdrvr_inode); - } -errout: - set_errno(errcode); - return ERROR; -} - |