kernel-ark/include/linux/dcookies.h
Jan Blunck 448678a0f3 d_path: Make get_dcookie() use a struct path argument
get_dcookie() is always called with a dentry and a vfsmount from a struct
path.  Make get_dcookie() take it directly as an argument.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Jan Blunck <jblunck@suse.de>
Acked-by: Christoph Hellwig <hch@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14 21:17:08 -08:00

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/path.h>
#include <linux/types.h>
struct dcookie_user;
/**
* 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(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(struct path *path, unsigned long *cookie)
{
return -ENOSYS;
}
#endif /* CONFIG_PROFILING */
#endif /* DCOOKIES_H */