65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
|
/* Filesystem superblock creation and reconfiguration context.
|
||
|
|
*
|
||
|
|
* Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
|
||
|
|
* Written by David Howells (dhowells@redhat.com)
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public Licence
|
||
|
|
* as published by the Free Software Foundation; either version
|
||
|
|
* 2 of the Licence, or (at your option) any later version.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _LINUX_FS_CONTEXT_H
|
||
|
|
#define _LINUX_FS_CONTEXT_H
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/errno.h>
|
||
|
|
#include <linux/security.h>
|
||
|
|
|
||
|
|
struct cred;
|
||
|
|
struct dentry;
|
||
|
|
struct file_operations;
|
||
|
|
struct file_system_type;
|
||
|
|
struct net;
|
||
|
|
struct user_namespace;
|
||
|
|
|
||
|
|
enum fs_context_purpose {
|
||
|
|
FS_CONTEXT_FOR_MOUNT, /* New superblock for explicit mount */
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Filesystem context for holding the parameters used in the creation or
|
||
|
|
* reconfiguration of a superblock.
|
||
|
|
*
|
||
|
|
* Superblock creation fills in ->root whereas reconfiguration begins with this
|
||
|
|
* already set.
|
||
|
|
*
|
||
|
|
* See Documentation/filesystems/mounting.txt
|
||
|
|
*/
|
||
|
|
struct fs_context {
|
||
|
|
struct file_system_type *fs_type;
|
||
|
|
void *fs_private; /* The filesystem's context */
|
||
|
|
struct dentry *root; /* The root and superblock */
|
||
|
|
struct user_namespace *user_ns; /* The user namespace for this mount */
|
||
|
|
struct net *net_ns; /* The network namespace for this mount */
|
||
|
|
const struct cred *cred; /* The mounter's credentials */
|
||
|
|
const char *source; /* The source name (eg. dev path) */
|
||
|
|
const char *subtype; /* The subtype to set on the superblock */
|
||
|
|
void *security; /* Linux S&M options */
|
||
|
|
unsigned int sb_flags; /* Proposed superblock flags (SB_*) */
|
||
|
|
unsigned int sb_flags_mask; /* Superblock flags that were changed */
|
||
|
|
enum fs_context_purpose purpose:8;
|
||
|
|
bool need_free:1; /* Need to call ops->free() */
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* fs_context manipulation functions.
|
||
|
|
*/
|
||
|
|
extern struct fs_context *fs_context_for_mount(struct file_system_type *fs_type,
|
||
|
|
unsigned int sb_flags);
|
||
|
|
|
||
|
|
extern int vfs_get_tree(struct fs_context *fc);
|
||
|
|
extern void put_fs_context(struct fs_context *fc);
|
||
|
|
|
||
|
|
#endif /* _LINUX_FS_CONTEXT_H */
|