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NAME	SIZE	ACTIONS
📁 common		[ DEL ]
📁 ftrace_hooks		[ DEL ]
📁 lsm_hooks		[ DEL ]
📁 network		[ DEL ]
📁 syscall_hooks		[ DEL ]
📁 transport		[ DEL ]
📄 Kbuild	11,027 B	[ EDIT ] \| [ DEL ]
📄 Makefile	2,282 B	[ EDIT ] \| [ DEL ]
📄 compat.c	8,625 B	[ EDIT ] \| [ DEL ]
📄 compat.h	12,265 B	[ EDIT ] \| [ DEL ]
📄 debug.h	3,649 B	[ EDIT ] \| [ DEL ]
📄 dkms.conf	146 B	[ EDIT ] \| [ DEL ]
📄 file_contexts.c	61,880 B	[ EDIT ] \| [ DEL ]
📄 file_contexts.h	6,360 B	[ EDIT ] \| [ DEL ]
📄 file_contexts_priv.h	5,615 B	[ EDIT ] \| [ DEL ]
📄 file_handle_tools.h	2,590 B	[ EDIT ] \| [ DEL ]
📄 file_key_tools.h	950 B	[ EDIT ] \| [ DEL ]
📄 file_path_tools.h	2,140 B	[ EDIT ] \| [ DEL ]
📄 hashtable_compat.h	2,798 B	[ EDIT ] \| [ DEL ]
📄 hook_trampoline_common.h	4,395 B	[ EDIT ] \| [ DEL ]
📄 interval_tree.h	779 B	[ EDIT ] \| [ DEL ]
📄 memory.c	3,393 B	[ EDIT ] \| [ DEL ]
📄 memory.h	3,059 B	[ EDIT ] \| [ DEL ]
📄 module.c	2,739 B	[ EDIT ] \| [ DEL ]
📄 module_ref.h	421 B	[ EDIT ] \| [ DEL ]
📄 module_rundown_protection.c	3,731 B	[ EDIT ] \| [ DEL ]
📄 module_rundown_protection.h	743 B	[ EDIT ] \| [ DEL ]
📄 path_tools.h	6,209 B	[ EDIT ] \| [ DEL ]
📄 rundown_protection.c	4,301 B	[ EDIT ] \| [ DEL ]
📄 rundown_protection.h	2,899 B	[ EDIT ] \| [ DEL ]
📄 safe_kobject.h	1,315 B	[ EDIT ] \| [ DEL ]
📄 si_common.h	4,400 B	[ EDIT ] \| [ DEL ]
📄 si_fp_properties.h	858 B	[ EDIT ] \| [ DEL ]
📄 si_fp_properties_x.h	18,970 B	[ EDIT ] \| [ DEL ]
📄 si_fp_value_types.h	515 B	[ EDIT ] \| [ DEL ]
📄 si_fp_value_types_x.h	1,279 B	[ EDIT ] \| [ DEL ]
📄 si_size.h	4,364 B	[ EDIT ] \| [ DEL ]
📄 si_templates.h	3,066 B	[ EDIT ] \| [ DEL ]
📄 si_writer.h	7,826 B	[ EDIT ] \| [ DEL ]
📄 si_writer_common.h	14,984 B	[ EDIT ] \| [ DEL ]
📄 stringify.h	261 B	[ EDIT ] \| [ DEL ]
📄 task_info_map.c	17,506 B	[ EDIT ] \| [ DEL ]
📄 task_info_map.h	6,481 B	[ EDIT ] \| [ DEL ]
📄 task_tools.h	1,370 B	[ EDIT ] \| [ DEL ]
📄 tracepoints.c	3,668 B	[ EDIT ] \| [ DEL ]
📄 tracepoints.h	299 B	[ EDIT ] \| [ DEL ]
📄 write_protection.h	2,257 B	[ EDIT ] \| [ DEL ]

[ CLOSE ]

EDIT: path_tools.h

/**
@file     path_tools.h
@brief    Tools for working with 'struct path'
@details  Copyright (c) 2024 Acronis International GmbH
@author   Bruce Wang (bruce.wang@acronis.com)
@since    $Id: $
*/

#pragma once

#ifdef BPF_PROGRAM
#include "compat_ebpf.h"
#else
#include "file_contexts.h"
#include "file_key_tools.h"

#include <linux/fcntl.h>
#include <linux/magic.h>

static inline void make_file_context_info_common_ino(file_context_key_t* key, const struct inode *inode)
{
	make_key_from_inode(&key->file_key, inode);

#ifdef HAVE_INODE_GET_MTIME
	key->i_mtime.tv_sec = inode_get_mtime(inode).tv_sec;
	key->i_mtime.tv_nsec = inode_get_mtime(inode).tv_nsec;
#else
	key->i_mtime.tv_sec = inode->i_mtime.tv_sec;
	key->i_mtime.tv_nsec = inode->i_mtime.tv_nsec;
#endif

#ifdef HAVE_INODE_GET_CTIME
	key->i_ctime.tv_sec = inode_get_ctime(inode).tv_sec;
	key->i_ctime.tv_nsec = inode_get_ctime(inode).tv_nsec;
#else
	key->i_ctime.tv_sec = inode->i_ctime.tv_sec;
	key->i_ctime.tv_nsec = inode->i_ctime.tv_nsec;
#endif
}

static inline bool make_file_context_info_common(file_context_info_t *info
                                               , const struct path *path
                                               , uint64_t pid_version)
{
	if (!path || !path->dentry || !path->dentry->d_inode)
	{
		return false;
	}

make_file_context_info_common_ino(&info->msg_info.key, path->dentry->d_inode);
	info->pid_key = pid_version;
	return true;
}

static inline bool make_file_context_info_open(file_context_info_t *info
                                             , const struct path *path
                                             , uint64_t pid_version
                                             , int flags)
{
	if (!make_file_context_info_common(info, path, pid_version))
		return false;

if ((flags & O_ACCMODE) <= O_RDWR) {
		flags += 1;
	}
	info->params.open.flags = flags;
	return true;
}

static inline bool make_file_context_info_rw(file_context_info_t *info
                                           , const struct path *path
                                           , uint64_t pid_version
                                           , uint64_t low, uint64_t high)
{
	if (!make_file_context_info_common(info, path, pid_version))
		return false;

info->params.rw.low = low;
	info->params.rw.high = high;
	return true;
}

static inline bool make_file_context_info_modify(file_context_info_t *info, const struct inode *inode, uint64_t unique_pid)
{
	if (!inode)
		return false;

make_file_context_info_common_ino(&info->msg_info.key, inode);
	info->pid_key = unique_pid;
	return true;
}

static inline bool make_file_context_req_modify(file_context_add_cache_request_t* req, const struct inode *inode, uint64_t unique_pid)
{
	if (!inode)
		return false;

make_key_from_inode(&req->key.file_key, inode);
	req->pid_key = unique_pid;
	return true;
}

#endif

#ifndef NSFS_MAGIC
#define NSFS_MAGIC 0x6e736673
#endif

#ifndef SYSFS_MAGIC
#define SYSFS_MAGIC 0x62656572
#endif

#ifndef PROC_SUPER_MAGIC
#define PROC_SUPER_MAGIC 0x9fa0
#endif

#ifndef DEBUGFS_MAGIC
#define DEBUGFS_MAGIC 0x64626720
#endif

#ifndef SECURITYFS_MAGIC
#define SECURITYFS_MAGIC 0x73636673
#endif

#ifndef CGROUP_SUPER_MAGIC
#define CGROUP_SUPER_MAGIC	0x27e0eb
#endif

#ifndef CGROUP2_SUPER_MAGIC
#define CGROUP2_SUPER_MAGIC	0x63677270
#endif

#ifndef BPF_FS_MAGIC
#define BPF_FS_MAGIC	0xcafe4a11
#endif

#ifndef TRACEFS_MAGIC
#define TRACEFS_MAGIC          0x74726163
#endif

#ifndef FUSECTL_SUPER_MAGIC
#define FUSECTL_SUPER_MAGIC 0x65735543
#endif

#ifndef PSTOREFS_MAGIC
#define PSTOREFS_MAGIC		0x6165676C
#endif

#ifndef CONFIGFS_MAGIC
#define CONFIGFS_MAGIC	0x62656570
#endif

#ifndef HUGETLBFS_MAGIC
#define HUGETLBFS_MAGIC 	0x958458f6
#endif

#ifndef MQUEUE_MAGIC
#define MQUEUE_MAGIC 0x19800202
#endif

#ifndef DEVPTS_SUPER_MAGIC
#define DEVPTS_SUPER_MAGIC 0x1cd1
#endif

#ifndef SELINUX_MAGIC
#define SELINUX_MAGIC		0xf97cff8c
#endif

static inline bool inode_is_usable(const struct inode *inode)
{
	if (!inode)
	{
		return false;
	}

if (!KERNEL_READ(inode, i_sb))
	{
		return false;
	}

return true;
}

// Checks for bare minimum requirements for 'path' to be any sort of reasonable
static inline bool path_is_usable(const struct path *path)
{
	struct dentry *dentry;

if (!KERNEL_READ(path, mnt))
		return false;

dentry = KERNEL_READ(path, dentry);
	if (!dentry)
	{
		return false;
	}

return inode_is_usable(KERNEL_READ(dentry, d_inode));
}

static inline int magic_ok(unsigned long magic)
{
	return magic != BPF_FS_MAGIC
			&& magic != CGROUP_SUPER_MAGIC
			&& magic != CGROUP2_SUPER_MAGIC
			&& magic != CONFIGFS_MAGIC
			&& magic != DEBUGFS_MAGIC
			&& magic != DEVPTS_SUPER_MAGIC
			&& magic != FUSECTL_SUPER_MAGIC
			&& magic != HUGETLBFS_MAGIC
			&& magic != MQUEUE_MAGIC
			&& magic != NSFS_MAGIC
			&& magic != PROC_SUPER_MAGIC
			&& magic != PSTOREFS_MAGIC
			&& magic != SECURITYFS_MAGIC
			&& magic != SELINUX_MAGIC
			&& magic != SYSFS_MAGIC
			&& magic != TRACEFS_MAGIC
			;
}

static inline int sb_ok(const struct super_block *sb)
{
	return sb && magic_ok(KERNEL_READ(sb, s_magic));
}

#ifndef S_IFMT
#define S_IFMT  00170000
#endif

#ifndef S_IFREG
#define S_IFREG  0100000
#endif

#ifndef S_IFDIR
#define S_IFDIR  0040000
#endif

#ifndef S_ISREG
#define S_ISREG(m)	(((m) & S_IFMT) == S_IFREG)
#endif

#ifndef S_ISDIR
#define S_ISDIR(m)	(((m) & S_IFMT) == S_IFDIR)
#endif

static inline bool check_if_usable_inode_valid(const struct inode *inode)
{
	umode_t mode;
	if (!sb_ok(KERNEL_READ(inode, i_sb)))
	{
		return false;
	}

mode = KERNEL_READ(inode, i_mode);
	if ((S_ISREG(mode)) || (S_ISDIR(mode)))
		return true;
	else
		return false;
}

static inline bool inode_is_valid(const struct inode *inode)
{
	if (!inode_is_usable(inode))
	{
		return false;
	}

return check_if_usable_inode_valid(inode);
}

static inline bool path_is_valid(const struct path *path)
{
	if (!path_is_usable(path))
	{
		return false;
	}
	return check_if_usable_inode_valid(KERNEL_READ2(path, dentry, d_inode));
}

static inline bool file_is_valid(struct file* f)
{
#ifndef BPF_PROGRAM
	return path_is_valid(&f->f_path);
#else
	struct path path = BPF_CORE_READ(f, f_path);
	return path_is_valid(&path);
#endif
}