Method and system for implementing write protection of block memory stack

Abstract

The invention discloses a method and a system for realizing write protection to a block memory bank. The invention utilizes the setting of the driving procedure of a block memory bank to indicate the data structure of the write permission of each block in the block memory bank and a driving procedure to judge whether write operation can be conducted to each block in the block memory bank or not. Therefore, whether a write command is given out by a file system or other application procedures, the driving procedure is used to execute write operation to each block in the block memory bank, so that due to the fact that the data structure is set for the driving procedure and the driving procedure judges whether conducting write operation according to the structure, under the circumstances that the file system or other application procedures give out write commands, the protection to the block memory bank can be realized, thereby increasing the reliability of the write protection to the block memory bank. In addition, in the invention, the realization of write protection to the block memory bank does not need the function expansion of the file system, and the cost of the write protection to the block memory bank is reduced.

Description

technical field [0001] The invention relates to data protection technology, in particular to a method for realizing write protection of a block storage body and a system for realizing write protection of a block storage body. Background technique [0002] A block storage body refers to a carrier for data storage organized in blocks on hardware or software. For example, flash memory (Flash) devices are divided into different blocks by storage addresses, and data is stored in the form of address blocks. Specifically, the data stored in the Flash device is stored in the address corresponding to the Flash device in the form of data blocks. In the block, when the data in a certain address block needs to be modified, the entire address block where the data is located must be erased first, and then the modified data is rewritten into the erased address block. For another example, the hard disk is divided into different blocks by sectors, and is organized in sector blocks. When the...

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Problems solved by technology

[0008] However, for the above two methods, it can only be guaranteed that the file system will not send a write command indicating to write a file to a block that stores data that needs to be protected under normal circumstances, so as to achieve write protection. However, if other applications target the storage block Sending a write command to write data will still rewrite the write-protected data and cannot achieve write protection

Moreover, for the above-mentioned first method, the file system needs to have complex functions and huge code, so the cost is too high for embedded devices with limited resources

[0009] It can be seen that the existing schemes for block storage write protection have low reliability and high cost

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