mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 14:43:58 +08:00
66f5496393
debugfs: implement symbolic links Implement a new function debugfs_create_symlink() which can be used to create symbolic links in debugfs. This function can be useful for people moving functionality from /proc to debugfs (e.g. the gcov-kernel patch). Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
/*
|
|
* debugfs.h - a tiny little debug file system
|
|
*
|
|
* Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
|
|
* Copyright (C) 2004 IBM Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version
|
|
* 2 as published by the Free Software Foundation.
|
|
*
|
|
* debugfs is for people to use instead of /proc or /sys.
|
|
* See Documentation/DocBook/kernel-api for more details.
|
|
*/
|
|
|
|
#ifndef _DEBUGFS_H_
|
|
#define _DEBUGFS_H_
|
|
|
|
#include <linux/fs.h>
|
|
|
|
#include <linux/types.h>
|
|
|
|
struct file_operations;
|
|
|
|
struct debugfs_blob_wrapper {
|
|
void *data;
|
|
unsigned long size;
|
|
};
|
|
|
|
#if defined(CONFIG_DEBUG_FS)
|
|
struct dentry *debugfs_create_file(const char *name, mode_t mode,
|
|
struct dentry *parent, void *data,
|
|
const struct file_operations *fops);
|
|
|
|
struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
|
|
|
|
struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
|
|
const char *dest);
|
|
|
|
void debugfs_remove(struct dentry *dentry);
|
|
|
|
struct dentry *debugfs_create_u8(const char *name, mode_t mode,
|
|
struct dentry *parent, u8 *value);
|
|
struct dentry *debugfs_create_u16(const char *name, mode_t mode,
|
|
struct dentry *parent, u16 *value);
|
|
struct dentry *debugfs_create_u32(const char *name, mode_t mode,
|
|
struct dentry *parent, u32 *value);
|
|
struct dentry *debugfs_create_bool(const char *name, mode_t mode,
|
|
struct dentry *parent, u32 *value);
|
|
|
|
struct dentry *debugfs_create_blob(const char *name, mode_t mode,
|
|
struct dentry *parent,
|
|
struct debugfs_blob_wrapper *blob);
|
|
#else
|
|
|
|
#include <linux/err.h>
|
|
|
|
/*
|
|
* We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
|
|
* so users have a chance to detect if there was a real error or not. We don't
|
|
* want to duplicate the design decision mistakes of procfs and devfs again.
|
|
*/
|
|
|
|
static inline struct dentry *debugfs_create_file(const char *name, mode_t mode,
|
|
struct dentry *parent, void *data,
|
|
const struct file_operations *fops)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
static inline struct dentry *debugfs_create_dir(const char *name,
|
|
struct dentry *parent)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
static inline struct dentry *debugfs_create_symlink(const char *name,
|
|
struct dentry *parent,
|
|
const char *dest)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
static inline void debugfs_remove(struct dentry *dentry)
|
|
{ }
|
|
|
|
static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode,
|
|
struct dentry *parent,
|
|
u8 *value)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode,
|
|
struct dentry *parent,
|
|
u16 *value)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode,
|
|
struct dentry *parent,
|
|
u32 *value)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
|
|
struct dentry *parent,
|
|
u32 *value)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
|
|
struct dentry *parent,
|
|
struct debugfs_blob_wrapper *blob)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif
|