CN103200085A - Method and system for achieving transmission and receiving of VXLAN message line speed - Google Patents
Method and system for achieving transmission and receiving of VXLAN message line speed Download PDFInfo
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- CN103200085A CN103200085A CN201310130270XA CN201310130270A CN103200085A CN 103200085 A CN103200085 A CN 103200085A CN 201310130270X A CN201310130270X A CN 201310130270XA CN 201310130270 A CN201310130270 A CN 201310130270A CN 103200085 A CN103200085 A CN 103200085A
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Abstract
The invention belongs to the field of network data processing, and provides a method and a system for achieving transmission and receiving of VXLAN message line speed. The method comprises the steps that a virtual machine application program calls a VXLAN interface library to open a network card device port, the VXLAN interface library distributes direct memory access (DMA) buffer area queues in user space, and transmits an address of a buffer area to a network card driver, a network card extension drive program writes a received VXLAN message in the DMA buffer area, an interface library function conducts VXLAN agreement de-encapsulation to the received message and submits the message to the virtual machine application program, the virtual machine application program calls the interface library function to sent the message, the interface library function conducts VXLAN encapsulation to the message and writes the message in the DMA buffer area, and the network card extension drive program transmits the message according to a target address. According to the method and the system for achieving the transmission and the receiving of the VXLAN message line speed, real-time processing to the VXLAN message is achieved in a cloud computing environment and cost of VXLAN message processing is effectively lowered on the premise that hardware equipment is not exchanged.
Description
Technical field
The invention belongs to the network data processing field, relate in particular to a kind of method and system of the VXLAN of realization message linear speed transmitting-receiving.
Background technology
Vlan technology is subjected to the restriction of 12 labels, can only provide 4096 virtual subnets in one network at most.In many tenants' system for cloud computing, to the quantity required of the virtual network ability considerably beyond VLAN, therefore be the realization framework that the producer of representative has proposed VXLAN with VMWARE, CISCO, 1,600 ten thousand virtual networks can be provided at most, thereby have thoroughly solved this problem.
In the prior art, realize the VXLAN framework, generally need server updating and the software and hardware external member of relevant producer is installed, and network performance is subjected to the restriction of soft hardware performance, both increased cost, again can't guaranteed qos.
Summary of the invention
The embodiment of the invention provides a kind of method of the VXLAN of realization message linear speed transmitting-receiving, is intended to address the above problem.
The embodiment of the invention is achieved in that a kind of method of the VXLAN of realization message linear speed transmitting-receiving, and described method comprises the steps:
Virtual machine application is called the VXLAN interface library and is opened the network card equipment port;
The VXLAN interface library distributes the formation of DMA buffering area at user's space, and drives the transmission buffer zone address to network interface card;
When receiving the VXLAN message, network interface card external drive program writes the DMA buffering area with the VXLAN message of receiving, directly reads for interface library, and the interface library function carries out the message of receiving to submit to virtual machine application after the decapsulation of VXLAN agreement;
When sending the VXLAN message, virtual machine application calling interface built-in function sends message, and the interface library function carries out message to write the DMA buffering area after the VXLAN encapsulation, and network interface card external drive program is transmitted according to destination address.
The embodiment of the invention also provides a kind of system of the VXLAN of realization message linear speed transmitting-receiving, and described system comprises:
The VXLAN interface library is used for distributing the formation of DMA buffering area; The reading DMA buffer data, and carry out the VXLAN decapsulation, parse VNI number, be transmitted to purpose virtual machine VM, call operation system general-purpose library function sends the ARP message audit destination address of band VXLAN encapsulation; Message is carried out the VXLAN encapsulation, and write buffering area, call intel network interface card external drive interface and send;
Network interface card external drive program is used for the reading DMA buffer data, and exports the physical port of network interface card to; Reception writes the DMA buffering area with the VXLAN ARP message that this machine MAC is destination address.
The embodiment of the invention is not being changed under the hardware devices circumstances, realizes the real-time processing to the VXLAN message in cloud computing environment, effectively reduces the cost that the VXLAN message is handled.
Description of drawings
Fig. 1 is the method flow diagram of the realization VXLAN message linear speed transmitting-receiving that provides of the embodiment of the invention;
Fig. 2 is the system construction drawing of the realization VXLAN message linear speed transmitting-receiving that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
The embodiment of the invention is used DMA buffering area queue processing VXLAN message, solved the packet sending and receiving efficiency, do not need to use special-purpose VXLAN protocol processes chip, realized calling the VXLAN function at common apparatus, and not newly-increased network card equipment, can realize the compatible processing to VXLAN message and common message, greatly reduce cost.
The method flow diagram that Fig. 1 receives and dispatches for the VXLAN message linear speed that the embodiment of the invention provides, details are as follows:
In step S101, virtual machine application is called the VXLAN interface library and is opened the network card equipment port;
In step S102, the VXLAN interface library distributes the formation of DMA buffering area at user's space, and drives the transmission buffer zone address to network interface card;
In step S103, when receiving the VXLAN message, network interface card external drive program writes the DMA buffering area with the VXLAN message of receiving, directly reads for interface library, and the interface library function carries out the message of receiving to submit to virtual machine application after the decapsulation of VXLAN agreement;
In step S104, when sending the VXLAN message, virtual machine application calling interface built-in function sends message, and the interface library function carries out message to write the DMA buffering area after the VXLAN encapsulation, and network interface card external drive program is transmitted according to destination address.
In embodiments of the present invention, when non-virtual machine application transmitting-receiving message, the built-in function of calling system acquiescence still, network interface card external drive program is not carried out the encapsulation of VXLAN and is connect encapsulation process it.Network interface card drives the transmitting-receiving of supporting simultaneously VXLAN message and common message.
In embodiments of the present invention, provide VXLAN packet sending and receiving support by the interface library mode for virtual machine application; Realize that cloud computing environment to the support of 1,600 ten thousand VLAN, is transparent to virtual machine application simultaneously basically.
In the embodiment of the invention, virtual machine application sends the implementation method of VXLAN message, and details are as follows:
1. virtual machine application is called the VXLAN interface library and is sent message;
2.VXLAN interface library distributes the formation of DMA buffering area;
3.VXLAN interface library calls intel network interface card external drive interface, and the DMA buffer zone address of distributing is passed to intel network interface card external drive;
4.VXLAN interface library call operation system general-purpose library function sends the ARP message audit destination address of band VXLAN encapsulation, if ip multicast should send to the VXLAN multicast address so, otherwise, if MAC Address is known, directly unicast to corresponding IP; If unknown, then be broadcast to the VXLAN gateway address;
5.intel network interface card external drive reading DMA buffer data, and output to the physical port of network interface card;
6. after recipient's main frame was received multicast message, the target MAC (Media Access Control) address of finding this message was oneself, namely began the VXLAN packet parsing and found purpose VNI number, determined purpose virtual machine VM, was transmitted to purpose VM.Purpose VM uses the MAC Address response transmit leg of oneself, and recipient's main frame uses this response of VXLAN protocol encapsulation, and uses the IP route to return transmit leg;
7.VXLAN interface library is preserved VNI and IP address translation table;
8.VXLAN interface library uses mode of unicast that message is carried out the VXLAN encapsulation, and the VXLAN message is write buffering area, calls intel network interface card external drive interface and sends;
9.intel network interface card external drive reading DMA buffer data, and output to the physical port of network interface card;
10. after the recipient received message, parsing VXLAN packet parsing also found purpose VNI number, determines purpose virtual machine VM, is transmitted to purpose VM.
In embodiments of the present invention, virtual machine application receives the implementation method of VXLAN message, and details are as follows:
1. virtual machine application is called the udp port that the VXLAN interface library is monitored appointment, registers the VNI of this virtual machine simultaneously;
2.VXLAN interface library distributes the formation of DMA buffering area;
3.VXLAN interface library calls intel network interface card external drive interface, and the DMA buffer zone address of distributing is passed to intel network interface card external drive;
4.intel it is the VXLAN ARP message of destination address that the network interface card external drive is received with this machine MAC, writes the DMA buffering area;
5.VXLAN interface library reading DMA buffer data, and carry out the VXLAN decapsulation, parse VNI number, be transmitted to purpose virtual machine VM;
6. purpose virtual machine VM replys response message, and the VXLAN interface library carries out the VXLAN encapsulation to response message, and writes the DMA buffering area, calls intel network interface card external drive interface and sends;
7.intel network interface card external drive reading DMA buffer data, and output to the physical port of network interface card.
The system construction drawing that Fig. 2 receives and dispatches for the realization VXLAN message linear speed that the embodiment of the invention provides, details are as follows:
Network interface card external drive program 22 reading DMA buffer datas, and export the physical port of network interface card to; Reception writes the DMA buffering area with the VXLAN ARP message that this machine MAC is destination address.
In embodiments of the present invention, VXLAN interface library 21 comprises that the user's space buffering area distributes and administration module 211, application call interface module 212, and VXLAN protocol process module 213.Wherein:
The distribution of user's space buffering area and administration module 211 are when the initialization of user's application call interface library, set up a plurality of DMA buffering areas at user's space, and provide buffering area control address to intel network interface card external drive, because the intel network interface card is supported the multiple buffer queue technology, message can be evenly distributed to each buffering area, thereby realize the multithreading load balancing of interface library.
Application call interface module 212 provides the calling interface function for virtual machine program, when virtual machine program transmitting-receiving VXLAN message, only need call corresponding receiver function.Interface is bound by the VM at Virtual Machine Manager control program and application program place, and distributes to VNI of each VM virtual machine (VXLAN sign).
VXLAN protocol process module 213 is responsible for encapsulation, decapsulation, read-write buffering area, the L2 study of VXLAN message.When receiving the VXLAN message of virtual machine application, at first send ARP message audit destination address, if ip multicast should send to the VXLAN multicast address so, otherwise, if MAC Address is known, directly unicast to corresponding IP; If unknown, then be broadcast to the VXLAN gateway address.The VXLAN encapsulation operation is added VXLAN packet header, UDP packet header, IP packet header for order.The VXLAN decapsulation is operating as removes IP packet header, UDP packet header, VXLAN packet header to the UDP message of receiving, returns to the VM application program.When receiving the VXLAN broadcast packet, VNI and IP address translation table that record VXLAN message carries.
In embodiments of the present invention, Intel network interface card external drive program 22 is to have carried out the function expansion on the basis of original driving, and its mixing of supporting DMA buffering area zero-copy pattern and common net mode card is used.Intel network interface card external drive program 22 comprises DMA buffering area control module 221, mixes packet sending and receiving module 222.Wherein:
The control address that DMA buffering area control module 221 is responsible for receiving from the VXLAN interface library formation of DMA buffering area; Distribute thread according to the DMA number of buffer of obtaining, guarantee the data homology chummage that each buffering area writes.
Mix packet sending and receiving module 222 according to the difference of calling interface, adopt DMA buffering area zero-copy pattern and common net mode card dual mode to handle message, for the former, from DMA buffer area read-write message, for the latter, from kernel spacing read-write message; This mode guarantees that network interface card can support common application and VXLAN to use simultaneously.
It is to solve owing to the newly-increased propagation delay time of virtual machine application call VXLAN interface library that the embodiment of the invention is used the purpose of DMA buffering area zero-copy pattern transmitting-receiving VXLAN message, guarantees the QoS of VXLAN business.
The embodiment of the invention is used DMA buffering area queue processing VXLAN message, solved the packet sending and receiving efficiency, do not need to use special-purpose VXLAN protocol processes chip, realized calling the VXLAN function at common apparatus, and not newly-increased network card equipment, can realize the compatible processing to VXLAN message and common message, greatly reduce cost.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. system that realizes VXLAN message linear speed transmitting-receiving is characterized in that described system comprises:
The VXLAN interface library is used for distributing the formation of DMA buffering area; The reading DMA buffer data, and carry out the VXLAN decapsulation, parse VNI number, be transmitted to purpose virtual machine VM, call operation system general-purpose library function sends the ARP message audit destination address of band VXLAN encapsulation; Message is carried out the VXLAN encapsulation, and write buffering area, call intel network interface card external drive interface and send;
Network interface card external drive program is used for the reading DMA buffer data, and exports the physical port of network interface card to; Reception writes the DMA buffering area with the VXLAN ARP message that this machine MAC is destination address.
2. the system as claimed in claim 1 is characterized in that, described VXLAN interface library comprises:
The user's space buffering area distributes and administration module, when being used for initialization, sets up a plurality of DMA buffering areas at user's space, and provides buffering area control address to intel network interface card external drive;
The application call interface module is used to virtual machine program that the calling interface function is provided, and when virtual machine program transmitting-receiving VXLAN message, only need call corresponding receiver function;
The VXLAN protocol process module is used for encapsulation, decapsulation, read-write buffering area, the L2 study of VXLAN message.
3. the system as claimed in claim 1 is characterized in that, described network interface card external drive program comprises:
DMA buffering area control module is used for from the control address of described VXLAN interface library reception DMA buffering area formation; Distribute thread according to the DMA number of buffer of obtaining, guarantee the data homology chummage that each buffering area writes;
Mix the packet sending and receiving module, be used for the difference according to calling interface, adopt DMA buffering area zero-copy pattern and common net mode card dual mode to handle message.
4. as the described system of claim 1-3, it is characterized in that described interface library mode provides VXLAN packet sending and receiving support for virtual machine application; Realize that cloud computing environment to the support of 1,600 ten thousand VLAN, is transparent to virtual machine application simultaneously basically.
5. as the described system of claim 1-3, it is characterized in that, handle the VXLAN message by DMA buffering area formation mode.
6. a method that realizes the transmitting-receiving of VXLAN message linear speed is characterized in that described method comprises the steps:
Virtual machine application is called the VXLAN interface library and is opened the network card equipment port;
The VXLAN interface library distributes the formation of DMA buffering area at user's space, and drives the transmission buffer zone address to network interface card;
When receiving the VXLAN message, network interface card external drive program writes the DMA buffering area with the VXLAN message of receiving, directly reads for interface library, and the interface library function carries out the message of receiving to submit to virtual machine application after the decapsulation of VXLAN agreement;
When sending the VXLAN message, virtual machine application calling interface built-in function sends message, and the interface library function carries out message to write the DMA buffering area after the VXLAN encapsulation, and network interface card external drive program is transmitted according to destination address.
7. method as claimed in claim 6 is characterized in that, it is characterized in that, described interface library mode provides VXLAN packet sending and receiving support for virtual machine application.
8. method as claimed in claim 7 is characterized in that, handles the VXLAN message by DMA buffering area formation mode.
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| CN109361723A (en) * | 2018-04-18 | 2019-02-19 | 上海锐智集数电子有限公司 | A kind of effective message transmission timing control method of UDP |
| CN109361723B (en) * | 2018-04-18 | 2021-08-31 | 上海锐智集数电子有限公司 | UDP (user Datagram protocol) effective message sending time sequence control method |
| CN110943941A (en) * | 2019-12-06 | 2020-03-31 | 北京天融信网络安全技术有限公司 | Message receiving method, message sending method, network card and electronic equipment |
| CN110943941B (en) * | 2019-12-06 | 2022-03-11 | 北京天融信网络安全技术有限公司 | Message receiving method, network card and electronic equipment |
| CN113630341A (en) * | 2021-08-03 | 2021-11-09 | 武汉绿色网络信息服务有限责任公司 | Data information processing method and server |
| CN113630341B (en) * | 2021-08-03 | 2023-06-06 | 武汉绿色网络信息服务有限责任公司 | Data information processing method and server |
| CN115225525A (en) * | 2022-07-07 | 2022-10-21 | 金锐软件技术(杭州)有限公司 | Network flow management system based on internet |
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