115 lines
3.0 KiB
C
115 lines
3.0 KiB
C
|
/*
|
||
|
|
* fs/kernfs/kernfs-internal.h - kernfs internal header file
|
||
|
|
*
|
||
|
|
* Copyright (c) 2001-3 Patrick Mochel
|
||
|
|
* Copyright (c) 2007 SUSE Linux Products GmbH
|
||
|
|
* Copyright (c) 2007, 2013 Tejun Heo <teheo@suse.de>
|
||
|
|
*
|
||
|
|
* This file is released under the GPLv2.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __KERNFS_INTERNAL_H
|
||
|
|
#define __KERNFS_INTERNAL_H
|
||
|
|
|
||
|
|
#include <linux/lockdep.h>
|
||
|
|
#include <linux/fs.h>
|
||
|
|
#include <linux/mutex.h>
|
||
|
|
#include <linux/xattr.h>
|
||
|
|
|
||
|
|
#include <linux/kernfs.h>
|
||
|
|
|
||
|
|
struct kernfs_iattrs {
|
||
|
|
struct iattr ia_iattr;
|
||
|
|
void *ia_secdata;
|
||
|
|
u32 ia_secdata_len;
|
||
|
|
|
||
|
|
struct simple_xattrs xattrs;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* +1 to avoid triggering overflow warning when negating it */
|
||
|
|
#define KN_DEACTIVATED_BIAS (INT_MIN + 1)
|
||
|
|
|
||
|
|
/* KERNFS_TYPE_MASK and types are defined in include/linux/kernfs.h */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* kernfs_root - find out the kernfs_root a kernfs_node belongs to
|
||
|
|
* @kn: kernfs_node of interest
|
||
|
|
*
|
||
|
|
* Return the kernfs_root @kn belongs to.
|
||
|
|
*/
|
||
|
|
static inline struct kernfs_root *kernfs_root(struct kernfs_node *kn)
|
||
|
|
{
|
||
|
|
/* if parent exists, it's always a dir; otherwise, @sd is a dir */
|
||
|
|
if (kn->parent)
|
||
|
|
kn = kn->parent;
|
||
|
|
return kn->dir.root;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* mount.c
|
||
|
|
*/
|
||
|
|
struct kernfs_super_info {
|
||
|
|
struct super_block *sb;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The root associated with this super_block. Each super_block is
|
||
|
|
* identified by the root and ns it's associated with.
|
||
|
|
*/
|
||
|
|
struct kernfs_root *root;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Each sb is associated with one namespace tag, currently the
|
||
|
|
* network namespace of the task which mounted this kernfs
|
||
|
|
* instance. If multiple tags become necessary, make the following
|
||
|
|
* an array and compare kernfs_node tag against every entry.
|
||
|
|
*/
|
||
|
|
const void *ns;
|
||
|
|
|
||
|
|
/* anchored at kernfs_root->supers, protected by kernfs_mutex */
|
||
|
|
struct list_head node;
|
||
|
|
};
|
||
|
|
#define kernfs_info(SB) ((struct kernfs_super_info *)(SB->s_fs_info))
|
||
|
|
|
||
|
|
extern const struct super_operations kernfs_sops;
|
||
|
|
extern struct kmem_cache *kernfs_node_cache;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* inode.c
|
||
|
|
*/
|
||
|
|
extern const struct xattr_handler *kernfs_xattr_handlers[];
|
||
|
|
void kernfs_evict_inode(struct inode *inode);
|
||
|
|
int kernfs_iop_permission(struct inode *inode, int mask);
|
||
|
|
int kernfs_iop_setattr(struct dentry *dentry, struct iattr *iattr);
|
||
|
|
int kernfs_iop_getattr(struct vfsmount *mnt, struct dentry *dentry,
|
||
|
|
struct kstat *stat);
|
||
|
|
ssize_t kernfs_iop_listxattr(struct dentry *dentry, char *buf, size_t size);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* dir.c
|
||
|
|
*/
|
||
|
|
extern struct mutex kernfs_mutex;
|
||
|
|
extern const struct dentry_operations kernfs_dops;
|
||
|
|
extern const struct file_operations kernfs_dir_fops;
|
||
|
|
extern const struct inode_operations kernfs_dir_iops;
|
||
|
|
|
||
|
|
struct kernfs_node *kernfs_get_active(struct kernfs_node *kn);
|
||
|
|
void kernfs_put_active(struct kernfs_node *kn);
|
||
|
|
int kernfs_add_one(struct kernfs_node *kn);
|
||
|
|
struct kernfs_node *kernfs_new_node(struct kernfs_node *parent,
|
||
|
|
const char *name, umode_t mode,
|
||
|
|
unsigned flags);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* file.c
|
||
|
|
*/
|
||
|
|
extern const struct file_operations kernfs_file_fops;
|
||
|
|
|
||
|
|
void kernfs_unmap_bin_file(struct kernfs_node *kn);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* symlink.c
|
||
|
|
*/
|
||
|
|
extern const struct inode_operations kernfs_symlink_iops;
|
||
|
|
|
||
|
|
#endif /* __KERNFS_INTERNAL_H */
|