Release 4.14 include/linux/debugfs.h

Directory: include/linux
/*
 *  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/filesystems/ for more details.
 */

#ifndef _DEBUGFS_H_

#define _DEBUGFS_H_

#include <linux/fs.h>
#include <linux/seq_file.h>

#include <linux/types.h>
#include <linux/compiler.h>

struct device;
struct file_operations;
struct srcu_struct;


struct debugfs_blob_wrapper {
	
void *data;
	
unsigned long size;
};


struct debugfs_reg32 {
	
char *name;
	
unsigned long offset;
};


struct debugfs_regset32 {
	
const struct debugfs_reg32 *regs;
	
int nregs;
	
void __iomem *base;
};

extern struct dentry *arch_debugfs_dir;

extern struct srcu_struct debugfs_srcu;

/**
 * debugfs_real_fops - getter for the real file operation
 * @filp: a pointer to a struct file
 *
 * Must only be called under the protection established by
 * debugfs_use_file_start().
 */

static inline const struct file_operations *debugfs_real_fops(const struct file *filp)
	__must_hold(&debugfs_srcuContributors
Person Tokens Prop Commits CommitProp
Christian Lamparter 16 94.12% 1 50.00%
Jakub Kiciński 1 5.88% 1 50.00%
Total 17 100.00% 2 100.00%

)
{
	/*
         * Neither the pointer to the struct file_operations, nor its
         * contents ever change -- srcu_dereference() is not needed here.
         */
	return filp->f_path.dentry->d_fsdata;
}


#define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt)		\
static int __fops ## _open(struct inode *inode, struct file *file)      \
{                                                                       \
        __simple_attr_check_format(__fmt, 0ull);                        \
        return simple_attr_open(inode, file, __get, __set, __fmt);      \
}                                                                       \
static const struct file_operations __fops = {                          \
        .owner   = THIS_MODULE,                                         \
        .open    = __fops ## _open,                                     \
        .release = simple_attr_release,                                 \
        .read    = debugfs_attr_read,                                   \
        .write   = debugfs_attr_write,                                  \
        .llseek  = no_llseek,                                           \
}

#if defined(CONFIG_DEBUG_FS)

struct dentry *debugfs_lookup(const char *name, struct dentry *parent);

struct dentry *debugfs_create_file(const char *name, umode_t mode,
				   struct dentry *parent, void *data,
				   const struct file_operations *fops);
struct dentry *debugfs_create_file_unsafe(const char *name, umode_t mode,
				   struct dentry *parent, void *data,
				   const struct file_operations *fops);

struct dentry *debugfs_create_file_size(const char *name, umode_t mode,
					struct dentry *parent, void *data,
					const struct file_operations *fops,
					loff_t file_size);

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);


typedef struct vfsmount *(*debugfs_automount_t)(struct dentry *, void *);
struct dentry *debugfs_create_automount(const char *name,
					struct dentry *parent,
					debugfs_automount_t f,
					void *data);

void debugfs_remove(struct dentry *dentry);
void debugfs_remove_recursive(struct dentry *dentry);

int debugfs_use_file_start(const struct dentry *dentry, int *srcu_idx)
	
__acquires(&debugfs_srcu
);


void debugfs_use_file_finish(int srcu_idx) __releases(&debugfs_srcu
);

ssize_t debugfs_attr_read(struct file *file, char __user *buf,
			size_t len, loff_t *ppos);
ssize_t debugfs_attr_write(struct file *file, const char __user *buf,
			size_t len, loff_t *ppos);

struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
                struct dentry *new_dir, const char *new_name);

struct dentry *debugfs_create_u8(const char *name, umode_t mode,
				 struct dentry *parent, u8 *value);
struct dentry *debugfs_create_u16(const char *name, umode_t mode,
				  struct dentry *parent, u16 *value);
struct dentry *debugfs_create_u32(const char *name, umode_t mode,
				  struct dentry *parent, u32 *value);
struct dentry *debugfs_create_u64(const char *name, umode_t mode,
				  struct dentry *parent, u64 *value);
struct dentry *debugfs_create_ulong(const char *name, umode_t mode,
				    struct dentry *parent, unsigned long *value);
struct dentry *debugfs_create_x8(const char *name, umode_t mode,
				 struct dentry *parent, u8 *value);
struct dentry *debugfs_create_x16(const char *name, umode_t mode,
				  struct dentry *parent, u16 *value);
struct dentry *debugfs_create_x32(const char *name, umode_t mode,
				  struct dentry *parent, u32 *value);
struct dentry *debugfs_create_x64(const char *name, umode_t mode,
				  struct dentry *parent, u64 *value);
struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
				     struct dentry *parent, size_t *value);
struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
				     struct dentry *parent, atomic_t *value);
struct dentry *debugfs_create_bool(const char *name, umode_t mode,
				  struct dentry *parent, bool *value);

struct dentry *debugfs_create_blob(const char *name, umode_t mode,
				  struct dentry *parent,
				  struct debugfs_blob_wrapper *blob);

struct dentry *debugfs_create_regset32(const char *name, umode_t mode,
				     struct dentry *parent,
				     struct debugfs_regset32 *regset);

void debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
			  int nregs, void __iomem *base, char *prefix);

struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
					struct dentry *parent,
					u32 *array, u32 elements);

struct dentry *debugfs_create_devm_seqfile(struct device *dev, const char *name,
					   struct dentry *parent,
					   int (*read_fn)(struct seq_file *s,
							  void *data));

bool debugfs_initialized(void);

ssize_t debugfs_read_file_bool(struct file *file, char __user *user_buf,
			       size_t count, loff_t *ppos);

ssize_t debugfs_write_file_bool(struct file *file, const char __user *user_buf,
				size_t count, loff_t *ppos);

#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_lookup(const char *name,
					    struct dentry *parent)
{
	return ERR_PTR(-ENODEV);
}

Contributors
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Omar Sandoval 26 100.00% 1 100.00%
Total 26 100.00% 1 100.00%



static inline struct dentry *debugfs_create_file(const char *name, umode_t mode,
					struct dentry *parent, void *data,
					const struct file_operations *fops)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Greg Kroah-Hartman 37 94.87% 1 33.33%
Al Viro 1 2.56% 1 33.33%
Jean Delvare 1 2.56% 1 33.33%
Total 39 100.00% 3 100.00%



static inline struct dentry *debugfs_create_file_unsafe(const char *name,
					umode_t mode, struct dentry *parent,
					void *data,
					const struct file_operations *fops)
{
	return ERR_PTR(-ENODEV);
}

Contributors
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Viresh Kumar 39 100.00% 1 100.00%
Total 39 100.00% 1 100.00%



static inline struct dentry *debugfs_create_file_size(const char *name, umode_t mode,
					struct dentry *parent, void *data,
					const struct file_operations *fops,
					loff_t file_size)
{
	return ERR_PTR(-ENODEV);
}

Contributors
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David Howells 42 100.00% 1 100.00%
Total 42 100.00% 1 100.00%



static inline struct dentry *debugfs_create_dir(const char *name,
						struct dentry *parent)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Greg Kroah-Hartman 26 100.00% 1 100.00%
Total 26 100.00% 1 100.00%



static inline struct dentry *debugfs_create_symlink(const char *name,
						    struct dentry *parent,
						    const char *dest)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Oberparleiter 31 100.00% 1 100.00%
Total 31 100.00% 1 100.00%


static inline struct dentry *debugfs_create_automount(const char *name,
					struct dentry *parent,
					struct vfsmount *(*f)(void *),
					void *data)
{
	return ERR_PTR(-ENODEV);
}



static inline void debugfs_remove(struct dentry *dentry)
{ }

Contributors
Person Tokens Prop Commits CommitProp
Greg Kroah-Hartman 11 100.00% 1 100.00%
Total 11 100.00% 1 100.00%



static inline void debugfs_remove_recursive(struct dentry *dentry)
{ }

Contributors
Person Tokens Prop Commits CommitProp
Håvard Skinnemoen 11 100.00% 1 100.00%
Total 11 100.00% 1 100.00%


static inline int debugfs_use_file_start(const struct dentry *dentry,
					int *srcu_idx)
	__acquires(&debugfs_srcuContributors
Person Tokens Prop Commits CommitProp
Nicolai Stange 18 100.00% 1 100.00%
Total 18 100.00% 1 100.00%

)
{
	return 0;
}


static inline void debugfs_use_file_finish(int srcu_idx)
	__releases(&debugfs_srcuContributors
Person Tokens Prop Commits CommitProp
Nicolai Stange 11 100.00% 1 100.00%
Total 11 100.00% 1 100.00%

)
{ }



static inline ssize_t debugfs_attr_read(struct file *file, char __user *buf,
					size_t len, loff_t *ppos)
{
	return -ENODEV;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnd Bergmann 23 82.14% 1 50.00%
Nicolai Stange 5 17.86% 1 50.00%
Total 28 100.00% 2 100.00%



static inline ssize_t debugfs_attr_write(struct file *file,
					const char __user *buf,
					size_t len, loff_t *ppos)
{
	return -ENODEV;
}

Contributors
Person Tokens Prop Commits CommitProp
Arnd Bergmann 29 100.00% 1 100.00%
Total 29 100.00% 1 100.00%



static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
                struct dentry *new_dir, char *new_name)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Jan Kara 35 100.00% 1 100.00%
Total 35 100.00% 1 100.00%



static inline struct dentry *debugfs_create_u8(const char *name, umode_t mode,
					       struct dentry *parent,
					       u8 *value)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Greg Kroah-Hartman 32 96.97% 1 50.00%
Al Viro 1 3.03% 1 50.00%
Total 33 100.00% 2 100.00%



static inline struct dentry *debugfs_create_u16(const char *name, umode_t mode,
						struct dentry *parent,
						u16 *value)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Greg Kroah-Hartman 31 93.94% 1 33.33%
Michal Ostrowski 1 3.03% 1 33.33%
Al Viro 1 3.03% 1 33.33%
Total 33 100.00% 3 100.00%



static inline struct dentry *debugfs_create_u32(const char *name, umode_t mode,
						struct dentry *parent,
						u32 *value)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Greg Kroah-Hartman 31 93.94% 1 33.33%
Al Viro 1 3.03% 1 33.33%
Michal Ostrowski 1 3.03% 1 33.33%
Total 33 100.00% 3 100.00%



static inline struct dentry *debugfs_create_u64(const char *name, umode_t mode,
						struct dentry *parent,
						u64 *value)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Michael Ellerman 32 96.97% 1 50.00%
Al Viro 1 3.03% 1 50.00%
Total 33 100.00% 2 100.00%



static inline struct dentry *debugfs_create_ulong(const char *name,
						umode_t mode,
						struct dentry *parent,
						unsigned long *value)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Viresh Kumar 34 100.00% 1 100.00%
Total 34 100.00% 1 100.00%



static inline struct dentry *debugfs_create_x8(const char *name, umode_t mode,
					       struct dentry *parent,
					       u8 *value)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Robin Getz 32 96.97% 1 50.00%
Al Viro 1 3.03% 1 50.00%
Total 33 100.00% 2 100.00%



static inline struct dentry *debugfs_create_x16(const char *name, umode_t mode,
						struct dentry *parent,
						u16 *value)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Robin Getz 32 96.97% 1 50.00%
Al Viro 1 3.03% 1 50.00%
Total 33 100.00% 2 100.00%



static inline struct dentry *debugfs_create_x32(const char *name, umode_t mode,
						struct dentry *parent,
						u32 *value)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Robin Getz 23 69.70% 1 33.33%
Johannes Berg 9 27.27% 1 33.33%
Al Viro 1 3.03% 1 33.33%
Total 33 100.00% 3 100.00%



static inline struct dentry *debugfs_create_x64(const char *name, umode_t mode,
						struct dentry *parent,
						u64 *value)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Johannes Berg 24 72.73% 1 50.00%
Robin Getz 9 27.27% 1 50.00%
Total 33 100.00% 2 100.00%



static inline struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
				     struct dentry *parent,
				     size_t *value)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Iñaky Pérez-González 30 90.91% 1 33.33%
Linus Torvalds 2 6.06% 1 33.33%
Al Viro 1 3.03% 1 33.33%
Total 33 100.00% 3 100.00%



static inline struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
				     struct dentry *parent, atomic_t *value)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Weijie Yang 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%



static inline struct dentry *debugfs_create_bool(const char *name, umode_t mode,
						 struct dentry *parent,
						 bool *value)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Greg Kroah-Hartman 30 90.91% 1 25.00%
Al Viro 1 3.03% 1 25.00%
Andrew Morton 1 3.03% 1 25.00%
Viresh Kumar 1 3.03% 1 25.00%
Total 33 100.00% 4 100.00%



static inline struct dentry *debugfs_create_blob(const char *name, umode_t mode,
				  struct dentry *parent,
				  struct debugfs_blob_wrapper *blob)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Michael Ellerman 33 97.06% 1 50.00%
Al Viro 1 2.94% 1 50.00%
Total 34 100.00% 2 100.00%



static inline struct dentry *debugfs_create_regset32(const char *name,
				   umode_t mode, struct dentry *parent,
				   struct debugfs_regset32 *regset)
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Alessandro Rubini 33 97.06% 1 50.00%
Al Viro 1 2.94% 1 50.00%
Total 34 100.00% 2 100.00%



static inline void debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
			 int nregs, void __iomem *base, char *prefix)
{
}

Contributors
Person Tokens Prop Commits CommitProp
Weijie Yang 27 93.10% 1 50.00%
Joe Perches 2 6.90% 1 50.00%
Total 29 100.00% 2 100.00%



static inline bool debugfs_initialized(void)
{
	return false;
}

Contributors
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Frédéric Weisbecker 12 100.00% 1 100.00%
Total 12 100.00% 1 100.00%



static inline struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
					struct dentry *parent,
					u32 *array, u32 elements)
{
	return ERR_PTR(-ENODEV);
}

Contributors
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Srivatsa Vaddagiri 36 100.00% 1 100.00%
Total 36 100.00% 1 100.00%



static inline struct dentry *debugfs_create_devm_seqfile(struct device *dev,
							 const char *name,
							 struct dentry *parent,
					   int (*read_fn)(struct seq_file *s,
							  void *data))
{
	return ERR_PTR(-ENODEV);
}

Contributors
Person Tokens Prop Commits CommitProp
Arend Van Spriel 47 100.00% 1 100.00%
Total 47 100.00% 1 100.00%



static inline ssize_t debugfs_read_file_bool(struct file *file,
					     char __user *user_buf,
					     size_t count, loff_t *ppos)
{
	return -ENODEV;
}

Contributors
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Richard Fitzgerald 28 100.00% 1 100.00%
Total 28 100.00% 1 100.00%



static inline ssize_t debugfs_write_file_bool(struct file *file,
					      const char __user *user_buf,
					      size_t count, loff_t *ppos)
{
	return -ENODEV;
}

Contributors
Person Tokens Prop Commits CommitProp
Richard Fitzgerald 29 100.00% 1 100.00%
Total 29 100.00% 1 100.00%

#endif

#endif
Overall Contributors
Person Tokens Prop Commits CommitProp
Greg Kroah-Hartman 355 18.21% 1 2.13%
Robin Getz 162 8.31% 1 2.13%
Nicolai Stange 154 7.90% 2 4.26%
Michael Ellerman 123 6.31% 2 4.26%
Alessandro Rubini 116 5.95% 2 4.26%
Richard Fitzgerald 100 5.13% 1 2.13%
Viresh Kumar 99 5.08% 3 6.38%
Arend Van Spriel 88 4.51% 2 4.26%
David Howells 74 3.79% 1 2.13%
Arnd Bergmann 65 3.33% 1 2.13%
Srivatsa Vaddagiri 62 3.18% 1 2.13%
Jan Kara 61 3.13% 1 2.13%
Weijie Yang 60 3.08% 1 2.13%
Iñaky Pérez-González 52 2.67% 2 4.26%
Peter Oberparleiter 52 2.67% 1 2.13%
Jiaxing Wang 42 2.15% 1 2.13%
Omar Sandoval 42 2.15% 1 2.13%
Al Viro 37 1.90% 3 6.38%
Johannes Berg 33 1.69% 1 2.13%
Christian Lamparter 30 1.54% 1 2.13%
Eric W. Biedermann 28 1.44% 1 2.13%
Seth Jennings 23 1.18% 1 2.13%
Huang Ying 22 1.13% 1 2.13%
Håvard Skinnemoen 20 1.03% 1 2.13%
Frédéric Weisbecker 18 0.92% 1 2.13%
Roland Dreier 9 0.46% 1 2.13%
Venkatesh Pallipadi 6 0.31% 1 2.13%
Jeff Garzik 3 0.15% 1 2.13%
Joe Perches 3 0.15% 1 2.13%
Linus Torvalds 2 0.10% 1 2.13%
Michal Ostrowski 2 0.10% 1 2.13%
Andrew Morton 1 0.05% 1 2.13%
Jakub Kiciński 1 0.05% 1 2.13%
Arjan van de Ven 1 0.05% 1 2.13%
Jean Delvare 1 0.05% 1 2.13%
Felipe Balbi 1 0.05% 1 2.13%
Mauro Carvalho Chehab 1 0.05% 1 2.13%
Geliang Tang 1 0.05% 1 2.13%
Total 1950 100.00% 47 100.00%
Directory: include/linux

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Person	Tokens	Prop	Commits	CommitProp
Christian Lamparter	16	94.12%	1	50.00%
Jakub Kiciński	1	5.88%	1	50.00%
Total	17	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.14 include/linux/debugfs.h

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