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2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
397 lines
11 KiB
C
397 lines
11 KiB
C
/*
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* debugfs.h - a tiny little debug file system
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*
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* Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (C) 2004 IBM Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* debugfs is for people to use instead of /proc or /sys.
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* See Documentation/DocBook/filesystems for more details.
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*/
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#ifndef _DEBUGFS_H_
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#define _DEBUGFS_H_
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#include <linux/fs.h>
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#include <linux/seq_file.h>
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#include <linux/types.h>
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#include <linux/compiler.h>
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struct device;
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struct file_operations;
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struct srcu_struct;
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struct debugfs_blob_wrapper {
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void *data;
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unsigned long size;
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};
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struct debugfs_reg32 {
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char *name;
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unsigned long offset;
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};
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struct debugfs_regset32 {
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const struct debugfs_reg32 *regs;
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int nregs;
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void __iomem *base;
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};
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extern struct dentry *arch_debugfs_dir;
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extern struct srcu_struct debugfs_srcu;
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/**
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* debugfs_real_fops - getter for the real file operation
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* @filp: a pointer to a struct file
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*
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* Must only be called under the protection established by
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* debugfs_use_file_start().
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*/
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static inline const struct file_operations *debugfs_real_fops(struct file *filp)
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__must_hold(&debugfs_srcu)
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{
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/*
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* Neither the pointer to the struct file_operations, nor its
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* contents ever change -- srcu_dereference() is not needed here.
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*/
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return filp->f_path.dentry->d_fsdata;
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}
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#define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt) \
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static int __fops ## _open(struct inode *inode, struct file *file) \
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{ \
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__simple_attr_check_format(__fmt, 0ull); \
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return simple_attr_open(inode, file, __get, __set, __fmt); \
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} \
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static const struct file_operations __fops = { \
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.owner = THIS_MODULE, \
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.open = __fops ## _open, \
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.release = simple_attr_release, \
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.read = debugfs_attr_read, \
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.write = debugfs_attr_write, \
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.llseek = generic_file_llseek, \
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}
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#if defined(CONFIG_DEBUG_FS)
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struct dentry *debugfs_create_file(const char *name, umode_t mode,
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struct dentry *parent, void *data,
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const struct file_operations *fops);
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struct dentry *debugfs_create_file_unsafe(const char *name, umode_t mode,
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struct dentry *parent, void *data,
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const struct file_operations *fops);
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struct dentry *debugfs_create_file_size(const char *name, umode_t mode,
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struct dentry *parent, void *data,
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const struct file_operations *fops,
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loff_t file_size);
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struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
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struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
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const char *dest);
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typedef struct vfsmount *(*debugfs_automount_t)(struct dentry *, void *);
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struct dentry *debugfs_create_automount(const char *name,
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struct dentry *parent,
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debugfs_automount_t f,
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void *data);
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void debugfs_remove(struct dentry *dentry);
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void debugfs_remove_recursive(struct dentry *dentry);
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int debugfs_use_file_start(const struct dentry *dentry, int *srcu_idx)
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__acquires(&debugfs_srcu);
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void debugfs_use_file_finish(int srcu_idx) __releases(&debugfs_srcu);
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ssize_t debugfs_attr_read(struct file *file, char __user *buf,
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size_t len, loff_t *ppos);
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ssize_t debugfs_attr_write(struct file *file, const char __user *buf,
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size_t len, loff_t *ppos);
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struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
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struct dentry *new_dir, const char *new_name);
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struct dentry *debugfs_create_u8(const char *name, umode_t mode,
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struct dentry *parent, u8 *value);
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struct dentry *debugfs_create_u16(const char *name, umode_t mode,
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struct dentry *parent, u16 *value);
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struct dentry *debugfs_create_u32(const char *name, umode_t mode,
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struct dentry *parent, u32 *value);
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struct dentry *debugfs_create_u64(const char *name, umode_t mode,
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struct dentry *parent, u64 *value);
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struct dentry *debugfs_create_ulong(const char *name, umode_t mode,
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struct dentry *parent, unsigned long *value);
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struct dentry *debugfs_create_x8(const char *name, umode_t mode,
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struct dentry *parent, u8 *value);
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struct dentry *debugfs_create_x16(const char *name, umode_t mode,
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struct dentry *parent, u16 *value);
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struct dentry *debugfs_create_x32(const char *name, umode_t mode,
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struct dentry *parent, u32 *value);
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struct dentry *debugfs_create_x64(const char *name, umode_t mode,
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struct dentry *parent, u64 *value);
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struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
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struct dentry *parent, size_t *value);
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struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
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struct dentry *parent, atomic_t *value);
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struct dentry *debugfs_create_atomic_unchecked_t(const char *name, umode_t mode,
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struct dentry *parent, atomic_unchecked_t *value);
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struct dentry *debugfs_create_bool(const char *name, umode_t mode,
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struct dentry *parent, bool *value);
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struct dentry *debugfs_create_blob(const char *name, umode_t mode,
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struct dentry *parent,
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struct debugfs_blob_wrapper *blob);
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struct dentry *debugfs_create_regset32(const char *name, umode_t mode,
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struct dentry *parent,
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struct debugfs_regset32 *regset);
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void debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
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int nregs, void __iomem *base, char *prefix);
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struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
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struct dentry *parent,
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u32 *array, u32 elements);
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struct dentry *debugfs_create_devm_seqfile(struct device *dev, const char *name,
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struct dentry *parent,
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int (*read_fn)(struct seq_file *s,
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void *data));
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bool debugfs_initialized(void);
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ssize_t debugfs_read_file_bool(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos);
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ssize_t debugfs_write_file_bool(struct file *file, const char __user *user_buf,
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size_t count, loff_t *ppos);
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#else
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#include <linux/err.h>
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/*
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* We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
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* so users have a chance to detect if there was a real error or not. We don't
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* want to duplicate the design decision mistakes of procfs and devfs again.
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*/
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static inline struct dentry *debugfs_create_file(const char *name, umode_t mode,
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struct dentry *parent, void *data,
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const struct file_operations *fops)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_file_size(const char *name, umode_t mode,
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struct dentry *parent, void *data,
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const struct file_operations *fops,
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loff_t file_size)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_dir(const char *name,
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struct dentry *parent)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_symlink(const char *name,
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struct dentry *parent,
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const char *dest)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_automount(const char *name,
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struct dentry *parent,
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struct vfsmount *(*f)(void *),
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void *data)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline void debugfs_remove(struct dentry *dentry)
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{ }
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static inline void debugfs_remove_recursive(struct dentry *dentry)
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{ }
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static inline int debugfs_use_file_start(const struct dentry *dentry,
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int *srcu_idx)
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__acquires(&debugfs_srcu)
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{
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return 0;
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}
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static inline void debugfs_use_file_finish(int srcu_idx)
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__releases(&debugfs_srcu)
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{ }
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static inline ssize_t debugfs_attr_read(struct file *file, char __user *buf,
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size_t len, loff_t *ppos)
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{
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return -ENODEV;
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}
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static inline ssize_t debugfs_attr_write(struct file *file,
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const char __user *buf,
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size_t len, loff_t *ppos)
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{
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return -ENODEV;
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}
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static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
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struct dentry *new_dir, char *new_name)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_u8(const char *name, umode_t mode,
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struct dentry *parent,
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u8 *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_u16(const char *name, umode_t mode,
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struct dentry *parent,
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u16 *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_u32(const char *name, umode_t mode,
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struct dentry *parent,
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u32 *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_u64(const char *name, umode_t mode,
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struct dentry *parent,
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u64 *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_x8(const char *name, umode_t mode,
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struct dentry *parent,
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u8 *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_x16(const char *name, umode_t mode,
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struct dentry *parent,
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u16 *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_x32(const char *name, umode_t mode,
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struct dentry *parent,
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u32 *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_x64(const char *name, umode_t mode,
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struct dentry *parent,
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u64 *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
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struct dentry *parent,
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size_t *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
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struct dentry *parent, atomic_t *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_atomic_unchecked_t(const char *name, umode_t mode,
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struct dentry *parent, atomic_unchecked_t *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_bool(const char *name, umode_t mode,
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struct dentry *parent,
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bool *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_blob(const char *name, umode_t mode,
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struct dentry *parent,
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struct debugfs_blob_wrapper *blob)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_regset32(const char *name,
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umode_t mode, struct dentry *parent,
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struct debugfs_regset32 *regset)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline void debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
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int nregs, void __iomem *base, char *prefix)
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{
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}
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static inline bool debugfs_initialized(void)
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{
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return false;
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}
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static inline struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
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struct dentry *parent,
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u32 *array, u32 elements)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_devm_seqfile(struct device *dev,
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const char *name,
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struct dentry *parent,
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int (*read_fn)(struct seq_file *s,
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void *data))
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{
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return ERR_PTR(-ENODEV);
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}
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static inline ssize_t debugfs_read_file_bool(struct file *file,
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char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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return -ENODEV;
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}
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static inline ssize_t debugfs_write_file_bool(struct file *file,
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const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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return -ENODEV;
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}
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#endif
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#endif
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