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/*
* 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/kernfs.h>
struct sysfs_inode_attrs {
struct iattr ia_iattr;
void *ia_secdata;
u32 ia_secdata_len;
};
#define SD_DEACTIVATED_BIAS INT_MIN
/* SYSFS_TYPE_MASK and types are defined in include/linux/kernfs.h */
/**
* kernfs_root - find out the kernfs_root a sysfs_dirent belongs to
* @sd: sysfs_dirent of interest
*
* Return the kernfs_root @sd belongs to.
*/
static inline struct kernfs_root *kernfs_root(struct sysfs_dirent *sd)
{
/* if parent exists, it's always a dir; otherwise, @sd is a dir */
if (sd->s_parent)
sd = sd->s_parent;
return sd->s_dir.root;
}
/*
* Context structure to be used while adding/removing nodes.
*/
struct sysfs_addrm_cxt {
struct sysfs_dirent *removed;
};
/*
* mount.c
*/
struct sysfs_super_info {
/*
* 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 sysfs instance. If multiple
* tags become necessary, make the following an array and compare
* sysfs_dirent tag against every entry.
*/
const void *ns;
};
#define sysfs_info(SB) ((struct sysfs_super_info *)(SB->s_fs_info))
extern struct kmem_cache *sysfs_dir_cachep;
/*
* inode.c
*/
struct inode *sysfs_get_inode(struct super_block *sb, struct sysfs_dirent *sd);
void sysfs_evict_inode(struct inode *inode);
int sysfs_permission(struct inode *inode, int mask);
int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat);
int sysfs_setxattr(struct dentry *dentry, const char *name, const void *value,
size_t size, int flags);
void sysfs_inode_init(void);
/*
* dir.c
*/
extern struct mutex sysfs_mutex;
extern const struct dentry_operations sysfs_dentry_ops;
extern const struct file_operations sysfs_dir_operations;
extern const struct inode_operations sysfs_dir_inode_operations;
struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd);
void sysfs_put_active(struct sysfs_dirent *sd);
void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt);
int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd,
struct sysfs_dirent *parent_sd);
void sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt);
struct sysfs_dirent *sysfs_new_dirent(struct kernfs_root *root,
const char *name, umode_t mode, int type);
/*
* file.c
*/
extern const struct file_operations kernfs_file_operations;
void sysfs_unmap_bin_file(struct sysfs_dirent *sd);
/*
* symlink.c
*/
extern const struct inode_operations sysfs_symlink_inode_operations;
#endif /* __KERNFS_INTERNAL_H */
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