CN107632782B - A BMC code protection method and device based on ARM whole cabinet server node - Google Patents

Abstract

The invention provides a BMC code protection method and device based on an ARM complete cabinet server node, belonging to the field of server security. The device includes: a plug-in trigger circuit module, which is used to know the information of the node to be pulled out by the user, and transmits the obtained information to the server node in the form of an electrical signal; a BMC protection module is used for receiving the plug-in trigger The circuit module sends out the signal of pulling out the node, and after receiving the signal, it stops the read and write operations of the BMC to the Flash, and at the same time, it performs read and write protection processing on the data inside the Flash; the display module is used for the BMC protection module. After the data is protected, the user is notified that it is possible to unplug the node. The invention is used in the whole cabinet server product based on the ARM CPU, and can effectively protect the software code information in the BMC Flash when plugging and unplugging the whole cabinet node, thereby improving the reliability of the product.

Description

A BMC code protection method and device based on ARM whole cabinet server node

technical field

The invention relates to the technical field of server security, in particular to a BMC code protection method and device based on an ARM whole cabinet server node.

Background technique

The whole cabinet server is a new type of server system, which can integrate modules such as power supply, cooling, and switching in one cabinet. As a whole platform, the whole cabinet has a higher degree of integration, which is convenient for centralized maintenance and management, can realize the rapid delivery of the whole cabinet, and improve the management efficiency and delivery speed. Compared with traditional servers, each server node of the entire cabinet server can be independently plugged and maintained for independent maintenance, which makes operation and maintenance simpler. Usually, the shutdown of the server node on the entire cabinet is to power off and shut down the CPU system on the motherboard. However, in order for users to remotely monitor and manage the node through the BMC, the BMC circuit system on the motherboard is still working. Therefore, when the node is shut down for maintenance, it is possible that the BMC is still working, for example, the BMC is reading and writing information to the Flash. Software information, causing an error in the server node system.

In the prior art, BMC's operations on Flash are usually completed through a file system, which is a method and data structure used by an operating system to specify files on a storage device or partition, that is, a method for organizing files on a storage device. The file system can ensure that the data will not be damaged in the event of an unexpected power failure to a certain extent through the log structure and other methods, but this is a passive method. The system does not know when the power is lost or when the data may be damaged. Fundamentally protect data.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a BMC code protection device and method based on an ARM whole cabinet server node, which is used to protect the software code information in the BMC Flash when plugging and unplugging the whole cabinet node, so as to improve the reliability of the product .

In order to achieve the above object, the present invention provides a BMC code protection device based on an ARM whole cabinet server node, the device comprising:

The plug-in trigger circuit module is used to know the information of the node to be pulled out by the user, and transmit the obtained information to the server node in the form of electrical signals;

The BMC protection module is used to receive the pull-out node signal sent by the plug-in trigger circuit module, and after receiving the signal, stop the BMC's read and write operations on the Flash, and at the same time perform read and write protection on the data inside the Flash to prevent users from The internal data of Flash is damaged when the unplugged node is powered off;

The display module is used for notifying the user that the operation of pulling out the node can be performed after the BMC protection module completes the data protection inside the Flash.

As an optimization, the plug-in trigger circuit module includes a plug-in trigger circuit, and the plug-in trigger circuit multiplexes the power switch button of the server node as the input button of the circuit, and when the button is pressed for a short time, the system is normally turned on and off; When the button is long pressed, it means that the user wants to unplug the node.

As an optimization, the BMC protection module realizes the protection of information in the BMC Flash through the cooperation of the CPLD and the BMC chip. The CPLD receives the pull-out node signal sent by the plug-in trigger circuit module, and then notifies the BMC to stop reading and writing to the Flash. At the same time, set the status register of Flash according to the need to configure the protection range and protection mode of the internal data of Flash. Finally, the BMC stops working and suspends waiting for the user to pull out the node operation.

As an optimization, the display module includes a display light. After the BMC protection module completes the protection of the internal data of the Flash, it returns a notification signal to the CPLD, and the CPLD lights the display light after receiving the returned notification signal to Inform the user to safely unplug the node.

In addition, the present invention also provides a BMC code protection method based on an ARM whole cabinet server node, the method comprising the following steps:

S1. Acquire the information of the node to be pulled out by the user, and transmit the obtained information to the server node in the form of an electrical signal;

S2, the BMC on the main board of the server node receives the electrical signal sent in the S1, and stops reading and writing operations on the Flash after receiving the electrical signal, and at the same time performs read-write protection processing on the data inside the Flash;

S3. After the BMC of the server node completes the protection of the data inside the Flash, the user is notified to perform an operation of pulling out the node.

As an optimization, in the above S1, the power switch button of the server node is reused as the input button. When the input button is pressed for a short time, the system is normally turned on and off; when the input button is long pressed, it indicates that the user wants to unplug the node.

As an optimization, in the S2, the CPLD and the BMC chip cooperate to realize the protection of the information in the BMC Flash. The CPLD receives the pull-out node signal sent in S1, and then notifies the BMC to stop the read and write operations on the Flash, and at the same time Set the status register of the Flash as required to configure the protection range and protection mode of the internal data of the Flash. Finally, the BMC stops working and suspends waiting for the user to pull out the node operation.

As an optimization, in the above S3, after the BMC completes the protection of the internal data of the Flash, it returns a notification signal to the CPLD. After receiving the returned notification signal, the CPLD lights up the corresponding indicator on the server node to notify the user to safely pull out out node.

The effects provided in the summary of the invention are only the effects of the embodiments, rather than all the effects of the invention. One of the above technical solutions has the following advantages or beneficial effects:

The invention proposes a BMC code protection device and method based on an ARM whole cabinet server node. The hardware circuit lets the node know when the power is going to be cut off, the system completes the normal operation before the power cut off, and notifies the system after the normal operation is completed. The user can unplug the node, thus avoiding corrupting the data in the Flash. The device and method of the invention are applied to the whole cabinet server product based on ARM CPU, can effectively protect the software code information in the BMC Flash when plugging and unplugging the whole cabinet node, and effectively prevent the BMC caused by the user plugging and unplugging the node. Data corruption in Flash improves product reliability.

Description of drawings

1 is a schematic structural diagram of a BMC code protection device based on an ARM whole cabinet server node provided by an embodiment of the present invention;

Fig. 2 is the working schematic diagram of the plug-in trigger circuit module in Fig. 1;

Fig. 3 is the working flow chart of BMC protection module in Fig. 1;

FIG. 4 is a flowchart for realizing the BMC code protection method based on the server node of the ARM whole cabinet provided by the embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

FIG. 1 is a schematic structural diagram of a BMC code protection device based on an ARM entire cabinet server node in this embodiment. The device includes a plug-in trigger circuit module 1 , a BMC protection module 2 and a display module 3 . The plug-in trigger circuit module 1 is used to know the information of the plug-in node to be performed by the user, and transmit the obtained information to the server node in the form of an electrical signal; the BMC protection module 2 is used to receive the plug-in trigger circuit The module sends out the unplug node signal, and after receiving the signal, the BMC stops the read and write operations of the Flash, and at the same time, it performs read and write protection on the data inside the Flash to prevent the user from pulling out the node when the power is turned off. The display module 3 is used to notify the user that the node can be pulled out after the BMC protection module completes data protection inside the Flash. The user needs to trigger the plugging trigger circuit module 1 before plugging and unplugging the node. The circuit module can be triggered by the user actively or passively. Trigger the circuit. If it is not triggered, the node will be locked on the cabinet to prevent the node from falling off the cabinet.

Specifically, as shown in FIG. 2 , the plug trigger circuit module 1 includes a plug trigger circuit, and the plug trigger circuit multiplexes the power switch button of the server node as the input button of the circuit. When the input button is pressed for a short time Indicates that the system is normally switched on and off; when the button is long-pressed, it indicates that the user wants to unplug the node. In the actual design, the circuit design can be realized by the single-chip microcomputer. The specific realization process is as follows: after pressing the input button, the "KEY_Power_On" signal changes from high level to low level, and the single-chip microcomputer starts timing to detect the input signal. If the time of pressing the key is less than 7s, it is considered that the user is switching the machine on and off, and the microcontroller sends the power-on signal "Power_on" to the server node. The node unplug signal "Node_present" is sent to the server node.

Further, as shown in FIG. 3 , the BMC protection module 2 realizes the protection of information in the BMC Flash through the cooperation of the CPLD and the BMC chip. After receiving the pull-out node signal "Node_present" sent by the single-chip microcomputer in the plug-in trigger circuit module 1, the CPLD notifies the BMC to stop reading and writing operations to the Flash, and performs the following actions at the same time: first, set the SRP0, SRP1 and SRP1 of the status register of the Flash as required. SEC, TB, BP3, BP2, BP1 and other bits are used to configure the protection range and protection mode of the internal data of the Flash, and then pull down the WP and CS signal bits of the Flash to prohibit reading and writing operations to the Flash and prevent the power-down process The interfering signal in the Flash will erroneously rewrite the data in the Flash through the signal line, and finally the BMC stops working and hangs up waiting for the user to unplug the node.

Described display module 3 comprises display light, when described BMC protection module 2 completes the protection to Flash internal data, returns notification signal " BMC_protect_ok " to CPLD, CPLD receives the returned notification signal and displays light on server node. Lights up and flashes at the appropriate frequency to inform the user that it is safe to unplug the node.

Fig. 4 provides the realization flow chart of the BMC code protection method based on ARM whole cabinet server node, described method comprises the following steps:

S1. Acquire the information of the node to be pulled out by the user, and transmit the obtained information to the server node in the form of an electrical signal;

S2, the BMC on the main board of the server node receives the electrical signal sent in the S1, and stops reading and writing operations on the Flash after receiving the electrical signal, and at the same time performs read-write protection processing on the data inside the Flash;

S3. After the BMC of the server node completes the protection of the data inside the Flash, the user is notified to perform an operation of pulling out the node.

Specifically, in the above S1, the power switch button of the server node is multiplexed as an input button. When the input button is pressed for a short time, the system is normally turned on and off; when the input button is long pressed, it indicates that the user wants to unplug the node. Specifically, it can be realized by single-chip microcomputer. The specific realization process is: single-chip microcomputer detects the input signal by timing. If the time for pressing the input button is short, such as less than 7s, it is considered that the user is switching the machine on and off, and the single-chip microcomputer sends the power-on and off signal to the server node; If it is detected that the input button is pressed for a long time, such as more than 7s, it is considered that the user is pulling out the node operation, and the single-chip microcomputer sends the node pulling out signal to the server node.

Further, in the described S2, the CPLD and the BMC chip cooperate with each other to realize the protection of the information in the BMC Flash. After the CPLD receives the pull-out node signal sent by the single-chip microcomputer in S1, it notifies the BMC to stop the read and write operations to the Flash. At the same time, the following actions are performed: first, set the corresponding bits of the status register of the Flash as required to configure the protection range and protection mode of the internal data of the Flash, and then pull down the WP and CS signal bits of the Flash to prohibit reading and writing operations to the Flash. To prevent the interference signal in the power-down process from incorrectly rewriting the data in the Flash through the signal line, and finally the BMC stops working and suspends waiting for the user to unplug the node.

Further, in the described S3, after the BMC completes the protection of the internal data of the Flash, it returns a notification signal to the CPLD, and after the CPLD receives the returned notification signal, the corresponding display lamp on the server node is lit to notify the The user safely unplugs the node.

The BMC code protection device and method based on an ARM whole cabinet server node in this embodiment, when applied to a whole cabinet server product based on an ARM CPU, can effectively prevent users from plugging and unplugging nodes in the BMC Flash during operation and maintenance. data corruption and improve product reliability.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, any modifications, improvements and equivalent replacements made without departing from the principles of the present invention, etc. , are included in the protection scope of the present invention.

Claims (6)

1. a BMC code protection device based on ARM whole cabinet server node, is characterized in that, described device comprises: The plug-in trigger circuit module is used to know the information of the node to be pulled out by the user, and transmit the obtained information to the server node in the form of electrical signals; The BMC protection module is used for receiving the pull-out node signal sent by the plug-in trigger circuit module, and after receiving the signal, stops the read-write operation of the Flash by the BMC, and at the same time performs read-write protection processing on the data inside the Flash; The BMC protection module realizes the protection of information in the BMC Flash through the cooperation of the CPLD and the BMC chip. The CPLD receives the pull-out node signal sent by the plug-in trigger circuit module, and then notifies the BMC to stop the read and write operations on the Flash, and at the same time as required. Set the status register of the Flash to configure the protection range and protection mode of the internal data of the Flash, and finally the BMC stops working and suspends waiting for the user to pull out the node operation; The display module is used for notifying the user to perform the operation of pulling out the node after the BMC protection module completes the data protection processing inside the BMC Flash. 2. a kind of BMC code protection device based on ARM whole cabinet server node according to claim 1, is characterized in that, described plug-in trigger circuit module comprises plug-in trigger circuit, and the plug-in trigger circuit changes the power supply of server node. The switch button is multiplexed as the input button of the circuit. When the button is pressed for a short time, it means that the machine is turned on and off normally, and when the button is pressed for a long time, it means that the user wants to unplug the node. 3. a kind of BMC code protection device based on ARM whole cabinet server node according to claim 1, is characterized in that, described display module comprises display lamp, after described BMC protection module completes the protection to Flash internal data, The notification signal is returned to the CPLD, and after receiving the returned notification signal, the CPLD lights the display light to notify the user to safely unplug the node. 4. a BMC code protection method based on ARM whole cabinet server node, is characterized in that, described method comprises the following steps: S1. Acquire the information of the node to be pulled out by the user, and transmit the obtained information to the server node in the form of an electrical signal; S2, the BMC on the main board of the server node receives the electrical signal sent in the S1, and stops reading and writing operations on the Flash after receiving the electrical signal, and at the same time performs read-write protection processing on the data inside the Flash; In the S2, the CPLD and the BMC chip are used together to protect the information in the BMC Flash. The CPLD receives the pull-out node signal sent in the S1, and then notifies the BMC to stop reading and writing operations to the Flash. The status register of the Flash is used to configure the protection range and protection method of the internal data of the Flash. Finally, the BMC stops working and suspends to wait for the user's unplugging node operation; S3. After the BMC of the server node completes the protection of the data inside the Flash, the user is notified to perform an operation of pulling out the node. 5. a kind of BMC code protection method based on ARM whole cabinet server node according to claim 4, is characterized in that, in described S1, the power switch key of server node is multiplexed as input key, when short When the input button is pressed, it means that the system is turned on and off normally; when the input button is long-pressed, it means that the user wants to unplug the node. 6. a kind of BMC code protection method based on ARM whole cabinet server node according to claim 4, is characterized in that, in described S3, after BMC completes the protection to Flash internal data, returns notification signal to CPLD , after receiving the returned notification signal, the CPLD lights up the corresponding indicator on the server node to notify the user to safely pull out the node.

Images