| /**************************************************************************** |
| * include/sys/mount.h |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. The |
| * ASF licenses this file to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the |
| * License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations |
| * under the License. |
| * |
| ****************************************************************************/ |
| |
| #ifndef __INCLUDE_SYS_MOUNT_H |
| #define __INCLUDE_SYS_MOUNT_H |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <nuttx/compiler.h> |
| #include <nuttx/fs/ioctl.h> |
| |
| /**************************************************************************** |
| * Pre-processor Definitions |
| ****************************************************************************/ |
| |
| #define BLKSSZGET BIOC_BLKSSZGET |
| #define BLKGETSIZE BIOC_BLKGETSIZE |
| |
| /* Mount flags */ |
| |
| #define MS_RDONLY 1 /* Mount file system read-only */ |
| |
| /* Un-mount flags |
| * |
| * These flags control the behavior of umount2() when there are open file |
| * references through the mountpoint. umount2() with no flag bits set is |
| * equivalent to umount(), i.e., the umount() will fail with EBUSY if there |
| * are open references on the file. |
| * |
| * MNT_FORCE - Force unmount even if busy. This can cause data loss. |
| * MNT_DETACH - Perform a lazy unmount: make the mount point unavailable |
| * for new accesses, and actually perform the unmount when the mount |
| * point ceases to be busy. |
| * MNT_EXPIRE - Mark the mount point as expired. If a mount point is not |
| * currently in use, then an initial call to umount2() with this flag |
| * fails with the error EAGAIN, but marks the mount point as expired. The |
| * mount point remains expired as long as it isn't accessed by any |
| * process. A second umount2() call specifying MNT_EXPIRE unmounts an |
| * expired mount point. This flag cannot be specified with either |
| * MNT_FORCE or MNT_DETACH. |
| * UMOUNT_NOFOLLOW (- Don't dereference target if it is a symbolic link. |
| * For Linux, this flag allows security problems to be avoided in |
| * set-user-ID-root programs that allow unprivileged users to unmount |
| * file systems. For NuttX, it is provided only for compatibility |
| * |
| * Not all options are supported on all file systems. |
| */ |
| |
| #define MNT_FORCE (1 << 0) |
| #define MNT_DETACH (1 << 1) |
| #define MNT_EXPIRE (1 << 2) |
| #define UMOUNT_NOFOLLOW (0) |
| |
| /* umount() is equivalent to umount2() with flags = 0 */ |
| |
| #define umount(t) umount2(t,0) |
| |
| /**************************************************************************** |
| * Public Type Definitions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Public Function Prototypes |
| ****************************************************************************/ |
| |
| #undef EXTERN |
| #if defined(__cplusplus) |
| #define EXTERN extern "C" |
| extern "C" |
| { |
| #else |
| #define EXTERN extern |
| #endif |
| |
| int mount(FAR const char *source, FAR const char *target, |
| FAR const char *filesystemtype, unsigned long mountflags, |
| FAR const void *data); |
| int umount2(FAR const char *target, unsigned int flags); |
| |
| #undef EXTERN |
| #if defined(__cplusplus) |
| } |
| #endif |
| |
| #endif /* __INCLUDE_SYS_MOUNT_H */ |