Data access control method of block device of VxWorks system driver layer

A vxworks, access control technology, applied in the access control of embedded operating systems, VxWorks system driver layer block device data access control field, can solve the VxWorks system security issues and other issues, to achieve the effect of improving security

Active Publication Date: 2015-01-28
JIANGSU BOZHI SOFTWARE TECH CO LTD
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  • Application Information

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  • Data access control method of block device of VxWorks system driver layer
  • Data access control method of block device of VxWorks system driver layer
  • Data access control method of block device of VxWorks system driver layer

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with specific embodiments and accompanying drawings. Here, the technical scheme of the present invention is further described by taking the development board equipped with the VxWorks system adopting the S3C2410 processor in ARM9 as an example.

[0032] Such as figure 1As shown, it is a schematic diagram of the system call structure after embedding the access monitor of the present invention, where different access monitors are embedded at the entrance of the dosFs file system driver layer and the block device driver layer, and the access monitor is embedded at the entrance of the block device driver layer , to control the read and write access to data in the block device; the access monitor is embedded in the dosFs file system driver layer, because the dosFs file system driver layer automatically caches the data read from the block device, and the illegal task is skipped at this time to read...

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Abstract

The invention discloses a data access control method of a block device of a VxWorks system driver layer. The method comprises the following steps: setting an authority library of a VxWorks system; performing basic package without disk cache on a block device interface to establish a CBIO (Cache Block Input/Output) device; performing embedded access to a monitor on a block device driver layer and a dosFs (Distributed Operating System Formal System Model) file system driver layer respectively; enabling that a task enters and accesses the monitor firstly during access of block device data, accessing the authority library which is previously set according to the matching of a current task ID (Identifier) and the block device, and controlling the access of the task to the block device data. Compared with the existing access control method, the method has the advantages that a better access control effect is realized and the security of data in the block device is improved.

Description

technical field [0001] The invention relates to access control of an embedded operating system, in particular to a VxWorks system drive layer block device data access control method, which belongs to the technical field of embedded system security. Background technique [0002] The VxWorks system itself does not take any measures for block device data security. Tian Li and Yuan Jiabin proposed the VxWorks security kernel mechanism in the article "Research on VxWorks Security Issues in Embedded Systems", and proposed security tags and multi-policy-based mandatory access control, etc. The security mechanism implements security marking and mandatory access control for Wind tasks, semaphores (binary / mutual exclusion / counting semaphores), message queues, pipelines, events, etc., and improves the security of the VxWorks system. However, there are few studies on data access control in VxWorks system block devices in this paper, and data access control is still an important issue. ...

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Application Information

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IPC IPC(8): G06F21/50G06F21/30G06F21/60
CPCG06F12/1458G06F21/45G06F2221/2141
Inventor 戴跃伟薛朋骏翟江涛
Owner JIANGSU BOZHI SOFTWARE TECH CO LTD
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