mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 23:55:21 +07:00
69 lines
1.3 KiB
C
69 lines
1.3 KiB
C
/*
|
|
* dcookies.h
|
|
*
|
|
* Persistent cookie-path mappings
|
|
*
|
|
* Copyright 2002 John Levon <levon@movementarian.org>
|
|
*/
|
|
|
|
#ifndef DCOOKIES_H
|
|
#define DCOOKIES_H
|
|
|
|
|
|
#ifdef CONFIG_PROFILING
|
|
|
|
#include <linux/dcache.h>
|
|
#include <linux/types.h>
|
|
|
|
struct dcookie_user;
|
|
struct path;
|
|
|
|
/**
|
|
* dcookie_register - register a user of dcookies
|
|
*
|
|
* Register as a dcookie user. Returns %NULL on failure.
|
|
*/
|
|
struct dcookie_user * dcookie_register(void);
|
|
|
|
/**
|
|
* dcookie_unregister - unregister a user of dcookies
|
|
*
|
|
* Unregister as a dcookie user. This may invalidate
|
|
* any dcookie values returned from get_dcookie().
|
|
*/
|
|
void dcookie_unregister(struct dcookie_user * user);
|
|
|
|
/**
|
|
* get_dcookie - acquire a dcookie
|
|
*
|
|
* Convert the given dentry/vfsmount pair into
|
|
* a cookie value.
|
|
*
|
|
* Returns -EINVAL if no living task has registered as a
|
|
* dcookie user.
|
|
*
|
|
* Returns 0 on success, with *cookie filled in
|
|
*/
|
|
int get_dcookie(const struct path *path, unsigned long *cookie);
|
|
|
|
#else
|
|
|
|
static inline struct dcookie_user * dcookie_register(void)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void dcookie_unregister(struct dcookie_user * user)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static inline int get_dcookie(const struct path *path, unsigned long *cookie)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
#endif /* CONFIG_PROFILING */
|
|
|
|
#endif /* DCOOKIES_H */
|