linux/fs/kernfs/kernfs-internal.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * 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 <[email protected]>
 */

#ifndef __KERNFS_INTERNAL_H
#define __KERNFS_INTERNAL_H

#include <linux/lockdep.h>
#include <linux/fs.h>
#include <linux/mutex.h>
#include <linux/rwsem.h>
#include <linux/xattr.h>

#include <linux/kernfs.h>
#include <linux/fs_context.h>

struct kernfs_iattrs { … };

struct kernfs_root { … };

/* +1 to avoid triggering overflow warning when negating it */
#define KN_DEACTIVATED_BIAS …

/* 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)
{ … }

/*
 * mount.c
 */
struct kernfs_super_info { … };
#define kernfs_info(SB) …

static inline struct kernfs_node *kernfs_dentry_node(struct dentry *dentry)
{ … }

static inline void kernfs_set_rev(struct kernfs_node *parent,
				  struct dentry *dentry)
{ … }

static inline void kernfs_inc_rev(struct kernfs_node *parent)
{ … }

static inline bool kernfs_dir_changed(struct kernfs_node *parent,
				      struct dentry *dentry)
{ … }

extern const struct super_operations kernfs_sops;
extern struct kmem_cache *kernfs_node_cache, *kernfs_iattrs_cache;

/*
 * inode.c
 */
extern const struct xattr_handler * const kernfs_xattr_handlers[];
void kernfs_evict_inode(struct inode *inode);
int kernfs_iop_permission(struct mnt_idmap *idmap,
			  struct inode *inode, int mask);
int kernfs_iop_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
		       struct iattr *iattr);
int kernfs_iop_getattr(struct mnt_idmap *idmap,
		       const struct path *path, struct kstat *stat,
		       u32 request_mask, unsigned int query_flags);
ssize_t kernfs_iop_listxattr(struct dentry *dentry, char *buf, size_t size);
int __kernfs_setattr(struct kernfs_node *kn, const struct iattr *iattr);

/*
 * dir.c
 */
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,
				    kuid_t uid, kgid_t gid,
				    unsigned flags);

/*
 * file.c
 */
extern const struct file_operations kernfs_file_fops;

bool kernfs_should_drain_open_files(struct kernfs_node *kn);
void kernfs_drain_open_files(struct kernfs_node *kn);

/*
 * symlink.c
 */
extern const struct inode_operations kernfs_symlink_iops;

/*
 * kernfs locks
 */
extern struct kernfs_global_locks *kernfs_locks;
#endif	/* __KERNFS_INTERNAL_H */