Security log file system, implementation method thereof and medium

Abstract

The invention provides a security log file system, an implementation method thereof and a medium. The system comprises the following components of: a file configuration module which is used for distributing files and folders to directory entries, wherein the directory entries comprise file names, sizes and file content initial addresses, and the directory entries serve as directory file contents to be stored in a data area; a conversion module used for carrying out mapping from a logic address to a physical address, outage recovery, garbage collection and wear leveling, and providing a virtualdisk, so that an upper-layer application directly uses a storage device based on the flash memory; a storage module used for dividing a logic block into a data block and a log block according to a mixed flash memory conversion layer thought, wherein the data block adopts block-level mapping and is used for storing data. and the log block adopts page-level mapping and is used for storing and updating. The security log file system, the implementation method thereof and the medium provided by the invention meet the requirements, are innovated on the existing basis, and have relatively strong operability and expansibility.

Description

technical field [0001] The invention relates to the technical field of embedded file system optimization, in particular to a security log file system and its implementation method and medium. Background technique [0002] The basic idea of ​​implementing a functionally safe file system is to use a log-based transaction-oriented file system. Due to disk file system data structure such as directory structure, free pointer may be inconsistent due to system crash. These structures are usually modified appropriately before an operating system adopts log-based techniques. A typical operation such as file creation may involve modifying many structures within the file system. Modify the directory structure, allocate file control blocks and data blocks, and reduce the free count of these blocks. These modifications may be interrupted by system crashes, resulting in data inconsistencies. For example, a free count might indicate that a file control block has been allocated, but the...

AI Technical Summary

Problems solved by technology

While it is possible to allow corrupted data structures to be repaired through recovery, there are many problems with doing so

One problem is that the consistency check may fail to repair the structure, resulting in loss of files or even entire directories

Compared with the method of this technical solution based on the FAT file system, its scope of application is slightly narrower, its scalability is not strong, and it is not suitable for applications in the embedded field

The second is more inclined to use external hardware, such as a backup battery pack to ensure the atomicity of data writing, so the cost is higher, and it is not suitable for smaller scale or budget-constrained embedded devices

In this patent, additional hardware assistance is added to ensure the integrity of log writing in the log file system, which greatly increases the cost and is not suitable for small embedded system solutions

Images