105 lines
4.2 KiB
C
105 lines
4.2 KiB
C
/****************************************************************************
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* fs/mount/mount.h
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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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#ifndef __FS_MOUNT_MOUNT_H
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#define __FS_MOUNT_MOUNT_H
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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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#ifndef CONFIG_DISABLE_MOUNTPOINT
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/****************************************************************************
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* Public Types
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****************************************************************************/
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struct statfs; /* Forward reference */
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/* Callback used by foreach_mountpoints to traverse all mountpoints in the
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* pseudo-file system.
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*/
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typedef int (*foreach_mountpoint_t)(FAR const char *mountpoint,
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FAR struct statfs *statbuf,
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FAR void *arg);
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: foreach_mountpoint
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*
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* Description:
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* Visit each mountpoint in the pseudo-file system. The traversal is
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* terminated when the callback 'handler' returns a non-zero value, or when
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* all of the mountpoints have been visited.
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*
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* This is just a front end "filter" to foreach_inode() that forwards only
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* mountpoint inodes. It is intended to support the mount() command to
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* when the mount command is used to enumerate mounts.
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*
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* NOTE 1: Use with caution... The pseudo-file system is locked throughout
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* the traversal.
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* NOTE 2: The search algorithm is recursive and could, in principle, use
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* an indeterminant amount of stack space. This will not usually be a
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* real work issue.
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*
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****************************************************************************/
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int foreach_mountpoint(foreach_mountpoint_t handler, FAR void *arg);
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/****************************************************************************
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* Name: fs_gettype
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*
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* Description:
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* Given the result of statfs(), return a string representing the type of
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* the file system.
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*
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* Input Parameters:
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* statbuf - The result of a previouis statbuf statfs on the file system.
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*
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* Returned Value:
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* A reference to a string representing the type of the file system.
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*
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****************************************************************************/
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FAR const char *fs_gettype(FAR struct statfs *statbuf);
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#endif /* CONFIG_DISABLE_MOUNTPOINT */
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#endif /* __FS_MOUNT_MOUNT_H */ |