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Name	Size	Permission	Date
common	[ DIR ]	drwxr-xr-x	2025-09-08 19:44
ftrace_hooks	[ DIR ]	drwxr-xr-x	2025-09-08 19:44
lsm_hooks	[ DIR ]	drwxr-xr-x	2025-09-08 19:44
syscall_hooks	[ DIR ]	drwxr-xr-x	2025-09-08 19:44
transport	[ DIR ]	drwxr-xr-x	2025-09-08 19:44
Kbuild	10.29 KB	-rw-r--r--	2025-09-08 19:44
Makefile	2.23 KB	-rw-r--r--	2025-09-08 19:44
compat.c	8.42 KB	-rw-r--r--	2025-09-08 19:44
compat.h	11.98 KB	-rw-r--r--	2025-09-08 19:44
debug.h	3.56 KB	-rw-r--r--	2025-09-08 19:44
dkms.conf	146 B	-rw-r--r--	2025-09-08 19:44
file_contexts.c	52.97 KB	-rw-r--r--	2025-09-08 19:44
file_contexts.h	2.86 KB	-rw-r--r--	2025-09-08 19:44
file_contexts_priv.h	5.33 KB	-rw-r--r--	2025-09-08 19:44
file_handle_tools.h	2.53 KB	-rw-r--r--	2025-09-08 19:44
file_key_tools.h	950 B	-rw-r--r--	2025-09-08 19:44
file_path_tools.h	2.09 KB	-rw-r--r--	2025-09-08 19:44
hashtable_compat.h	2.73 KB	-rw-r--r--	2025-09-08 19:44
hook_trampoline_common.h	4.29 KB	-rw-r--r--	2025-09-08 19:44
interval_tree.h	779 B	-rw-r--r--	2025-09-08 19:44
memory.c	3.31 KB	-rw-r--r--	2025-09-08 19:44
memory.h	2.99 KB	-rw-r--r--	2025-09-08 19:44
module.c	2.67 KB	-rw-r--r--	2025-09-08 19:44
module_ref.h	421 B	-rw-r--r--	2025-09-08 19:44
module_rundown_protection.c	3.64 KB	-rw-r--r--	2025-09-08 19:44
module_rundown_protection.h	743 B	-rw-r--r--	2025-09-08 19:44
path_tools.h	5.84 KB	-rw-r--r--	2025-09-08 19:44
rundown_protection.c	4.2 KB	-rw-r--r--	2025-09-08 19:44
rundown_protection.h	2.83 KB	-rw-r--r--	2025-09-08 19:44
safe_kobject.h	1.28 KB	-rw-r--r--	2025-09-08 19:44
si_common.h	4.3 KB	-rw-r--r--	2025-09-08 19:44
si_fp_properties.h	858 B	-rw-r--r--	2025-09-08 19:44
si_fp_properties_x.h	18.53 KB	-rw-r--r--	2025-09-08 19:44
si_fp_value_types.h	515 B	-rw-r--r--	2025-09-08 19:44
si_fp_value_types_x.h	1.25 KB	-rw-r--r--	2025-09-08 19:44
si_size.h	4.26 KB	-rw-r--r--	2025-09-08 19:44
si_templates.h	2.99 KB	-rw-r--r--	2025-09-08 19:44
si_writer.h	7.52 KB	-rw-r--r--	2025-09-08 19:44
si_writer_common.h	14.63 KB	-rw-r--r--	2025-09-08 19:44
stringify.h	261 B	-rw-r--r--	2025-09-08 19:44
task_info_map.c	17.1 KB	-rw-r--r--	2025-09-08 19:44
task_info_map.h	6.33 KB	-rw-r--r--	2025-09-08 19:44
task_tools.h	1.34 KB	-rw-r--r--	2025-09-08 19:44
tracepoints.c	3.58 KB	-rw-r--r--	2025-09-08 19:44
tracepoints.h	299 B	-rw-r--r--	2025-09-08 19:44
write_protection.h	2.2 KB	-rw-r--r--	2025-09-08 19:44

Rename

/**
@file     file_contexts.h
@brief    Store the opened file contexts(inode + pid)
@details  Copyright (c) 2023 Acronis International GmbH
@author   Bruce Wang (bruce.wang@acronis.com)
@since    $Id: $
*/

#pragma once

#include "interval_tree.h"
#include "transport.h"
#include "transport_id.h"

typedef struct
{
    long long tv_sec;
    long tv_nsec;
} timespec_compat_t;

typedef struct
{
    file_key_t file_key;
    timespec_compat_t i_mtime; /* last modify time */
    timespec_compat_t i_ctime; /* last change time */
} file_context_key_t;

// This struct is stored in msg_t, to keep the necessary information
typedef struct
{
    file_context_key_t key;
    transport_id_t skipped_transport_ids[MAX_TRANSPORT_SIZE];
} file_context_msg_info_t;

// A struct to store the temporary file context information
typedef struct
{
    union
    {
        uint64_t pid_version;
        uint64_t unique_pid;
    };
    uint64_t low;
    uint64_t high;
    int flags;
    file_context_msg_info_t msg_info;
} file_context_info_t;

// Context that is global per file
typedef struct
{
    // currently unused
} file_context_open_file_t;

// Context that is global per file + process
typedef struct
{
    atomic_t flags;
} file_context_open_process_t;

typedef struct
{
    atomic_t flags;
} file_context_process_t;

typedef struct
{
    interval_set_t interval_set;
    spinlock_t spinlock;
    atomic_t is_reported;
} file_context_rw_t;

typedef enum
{
    FILE_CONTEXT_OPEN_TABLE = 0,
    FILE_CONTEXT_READ_TABLE,
    FILE_CONTEXT_WRITE_TABLE,
} file_context_table_type_t;

int file_contexts_init(void);
void file_contexts_init_fail_free(void);
void file_contexts_deinit(void);
void remove_common_cache_all(const file_key_t* file_key);
int acquire_file_context_entry(transport_id_t id);
void release_file_context_entry(transport_id_t id);
bool check_open_cache(const transport_ids_t* ids, file_context_info_t *info);
int add_open_cache(transport_id_t id, const file_context_info_t *info,
                   file_context_open_file_t **file_node, file_context_open_process_t **process_node);
void put_open_cache(file_context_open_file_t *file_node, file_context_open_process_t *process_node);
file_context_rw_t *add_rw_cache(transport_id_t id, file_context_info_t *info, file_context_table_type_t type);
bool check_and_update_read_cache(const transport_ids_t* ids, file_context_info_t *info);
bool check_write_cache(const transport_ids_t* ids, file_context_info_t *info, file_context_table_type_t type);
void put_rw_cache(file_context_rw_t *node);
void clean_interval_tree(interval_set_t *set);
bool insert_interval(uint64_t low, uint64_t high, interval_set_t *set);
bool check_interval(uint64_t low, uint64_t high, interval_set_t *set);
bool check_update_file_modify_cache(file_context_info_t *info);
bool add_file_modify_cache(file_context_info_t *info);
int acquire_file_modify_entry(void);
void release_file_modify_entry(void);