WO2016197848A1

WO2016197848A1 - Method, apparatus and system for managing network card

Info

Publication number: WO2016197848A1
Application number: PCT/CN2016/084335
Authority: WO
Inventors: 姚治成; 马久跃; 隋秀峰; 包云岗
Original assignee: 华为技术有限公司
Priority date: 2015-06-09
Filing date: 2016-06-01
Publication date: 2016-12-15
Also published as: CN106301859A; CN106301859B

Abstract

Disclosed is a method for managing a network card. The method comprises the following steps: establishing a mapping table, wherein the mapping table is used to save a mapping relationship between plural virtual network cards and plural physical network cards; receiving a data packet; querying the mapping table according to a virtual new-generation peripheral component interface express (PCIe) address of the data packet, and acquiring address information, i.e. a physical PCIe address, about a physical network card corresponding to the virtual PCIe address; and forwarding the data packet to the physical network card corresponding to the virtual PCIe address. In the present invention, the mapping table is utilized to establish the mapping relationship between plural virtual network cards and plural physical network cards, unified management of a plurality of physical network cards is implemented, the flexibility of a system is improved, and hot plugging of a network card can be done according to different needs, having a very good fault tolerance function and reliability.

Description

Method, device and system for managing network card

Technical field

Embodiments of the present invention relate to the field of information technology, and in particular, to a method, device, and system for managing a network card.

Background technique

Virtualization abstracts and transforms various physical resources of a computer, such as servers, networks, memory, and storage, and breaks down barriers between physical structures. Computer components run on a virtual basis rather than on a real basis. To enable users to better apply these resources. Virtualization technology can simulate multiple independent hardware environments on a single hardware platform, so that one platform can run multiple operating systems at the same time, and applications can run in separate spaces without affecting each other, thus significantly improving the work of the computer. effectiveness.

In the existing virtualization technology, virtual network cards used by virtual machines (VMs) are provided by the hypervisor software at the software layer, and all virtual network cards share a physical network card. The inventor found that although the virtual network card provided by the software layer is convenient and flexible to use, it has problems such as complicated implementation, insufficient performance, and poor reliability. First of all, the hypervisor software of virtualization technology is complex in design. At this level, virtualized management of devices requires complex control logic. However, the traffic isolation of virtual network cards needs to be guaranteed at this level, further increasing the Hypervisor software. Design difficulty. Secondly, the complex implementation results in a virtual software card stack that is too thick, and its performance is severely degraded in the case of high load and multiple virtual network cards. In addition, the software-level NIC virtualization technology also has poor reliability. The virtual NIC of the software layer shares a physical NIC, so once the physical NIC fails, all virtual layer NICs based on it will not work properly.

Summary of the invention

It is an object of embodiments of the present invention to provide a method, apparatus, and system for managing a network card that can improve system stability and scalability.

In a first aspect, a method of managing a network card is provided, including the following steps:

Establishing a mapping table, where the mapping table is used to save a plurality of virtual network cards and a plurality of physical network cards Mapping relationship between

Receiving a data packet;

Querying the mapping table according to the virtual new generation peripheral component expansion interface PCIe address of the data packet, and acquiring the address information of the physical network card corresponding to the virtual PCIe address, that is, the physical PCIe address;

And forwarding the data packet to a physical network card corresponding to the virtual PCIe address.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the mapping table specifically includes: a virtual PCIe address, a virtual MAC address, a physical PCIe address, and weight information.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the forwarding, by the physical network card corresponding to the virtual PCIe address, the data packet The steps specifically include:

When the physical network card corresponding to the virtual PCIe address is one, the data packet is directly forwarded to the corresponding physical network card;

When there are multiple physical network cards corresponding to the virtual PCIe address, the data packet is sent to one physical network card of the plurality of physical network cards by using load balancing technology.

With reference to the first aspect, and the first to the second possible possible implementation manners of the first aspect, in a third possible implementation manner of the first aspect, the querying according to the virtual PCIe address Before the step of mapping the table, the method further includes:

The NIC manager temporarily stores the data packet in the cache unit;

The NIC manager obtains the virtual PCIe address information.

In a second aspect, a network card manager is provided, including:

a receiving unit, configured to receive a data packet;

a storage unit, configured to store a network card mapping table, where the mapping table stores a mapping relationship between a plurality of virtual network cards and a plurality of physical network cards, wherein one virtual network card may also be mapped to multiple physical network cards;

a control unit, configured to query the mapping table according to the virtual new generation peripheral component expansion interface PCIe address of the data packet, and obtain address information of a physical network card corresponding to the virtual PCIe address;

And a sending unit, configured to send the data packet to a physical network card corresponding to the address information according to an instruction of the control unit.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the mapping table specifically includes: a virtual PCIe address, a virtual MAC address, a physical PCIe address, and weight information.

In conjunction with the second aspect or the first possible implementation of the second aspect, in a second possible implementation of the second aspect, the control unit is further configured to:

When the physical network card corresponding to the virtual PCIe address is one, the sending unit is controlled to directly forward the data packet to the corresponding physical network card;

When there are multiple physical network cards corresponding to the virtual PCIe address, the load balancing technology is used to control the sending unit to send the data packet to one of the plurality of physical network cards.

With reference to the second aspect, in a third possible implementation manner of the second aspect, the method further includes:

a cache unit, configured to cache the data packet;

The control unit is further configured to acquire a virtual PCIe address of the data packet.

A third aspect provides a network card management system, including: a plurality of physical network cards, a plurality of virtual network cards, and a network card manager, wherein the plurality of physical network cards are connected to the network card manager, and the plurality of virtual network cards are virtualized by the network card manager. The network card manager further includes:

a receiving unit, configured to receive a data packet;

In conjunction with the third aspect, in a first possible implementation manner of the third aspect, the control unit is further configured to:

With the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the network controller further includes:

a cache unit, configured to cache the data packet;

The beneficial effects of the embodiments of the present invention are: in the embodiment of the present invention, a mapping relationship between a plurality of virtual network cards and a plurality of physical network cards is established by using a mapping table, and two or more virtual network cards may be mapped to one physical network card to improve physical network cards. The utilization efficiency; a virtual network card can also be mapped to multiple physical network cards. When one of the physical network cards fails, the network card manager can offload the data packets to other physical network cards that can work normally, and play the role of backup protection to improve virtuality. The stability of the machine system. In addition, the physical network card may be temporarily added according to the service requirement. In this case, only the mapping table of the network card manager needs to be updated, and the added physical network card is added to the mapping table, and the network card manager can split the data packet according to the updated mapping table. The flexibility and scalability of the virtual machine system is greatly enhanced.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without any creative work.

1 is a schematic structural diagram of a network card management system according to an embodiment of the present invention;

2 is a schematic structural diagram of a network card manager according to an embodiment of the present invention;

3 is a schematic flow chart of a method according to a first embodiment of the present invention;

4 is a flow chart showing the method of the second embodiment of the present invention.

detailed description

As shown in FIG. 1 , a network card management system according to an embodiment of the present invention includes: a plurality of physical network cards, a network card manager, and a plurality of virtual network cards. A plurality of physical network cards are respectively connected to the network card manager, and a plurality of virtual network cards are virtualized through the network card manager.

As shown in FIG. 2, the network card manager of the present invention further includes: a receiving unit, a buffer unit (RINGBUFFER), a storage unit, a control unit, and a transmitting unit. The receiving unit is configured to receive a data packet, and the cache unit is configured to cache a data packet received by the physical network card, a data packet sent to the virtual network card, and other temporary data packets, and a storage unit configured to save the network interface card (Network Interface Card) , NIC) mapping table, the contents of the mapping table are shown in Table 1:

Virtual PCIe address

Virtual MAC address

Physical PCIe address

Weights

Reserved

VNIC₁ VNIC ₁	MAC₁ MAC ₁	PNIC₁ PNIC ₁	weightWeight	reservedReserved
VNIC₂ VNIC ₂	MAC₂ MAC ₂	PNIC₂ PNIC ₂	weightWeight	reservedReserved
VNIC₃ VNIC ₃	MAC₃ MAC ₃	PNIC₂，PNIC₄ PNIC ₂ , PNIC ₄	weightWeight	reservedReserved
…...	…...	…...	weightWeight	reservedReserved
VNIC_k VNIC _k	MAC_k MAC _k	PNIC_n PNIC _n	weightWeight	reservedReserved

Table 1

The mapping table is used to store a mapping relationship between a plurality of virtual network interface cards (VNICs) and a plurality of physical network interface cards (PNICs), wherein multiple virtual network cards can be mapped to one physical network card, one virtual The NIC can also be mapped to multiple physical NICs. As shown in Table 1, the virtual network card VNIC1 corresponds to the unique physical network card PNIC1, and the virtual network card VNIC3 is mapped to two physical network cards (PNIC2 and PNIC4).

a control unit, configured to query the mapping table according to the virtual new generation peripheral component expansion interface PCIe address of the data packet to obtain address information of a physical network card corresponding to the virtual PCIe address, and the control unit further includes direct memory access (Direct Memory Access, DMA) controller, protocol analysis (PA) logic, etc., used to control the entire workflow of the NIC manager;

As shown in FIG. 3, when there is downlink data transmission, the operation process of the method according to the first embodiment of the present invention is as follows:

S100, the receiving unit of the network card manager receives the data packet from the upper layer device, and assumes that the virtual PCIe (Peripheral Component Interconnect Express) address of the data packet is VNIC1;

S102. The network card manager temporarily saves the data packet in a cache unit.

S104, the control unit of the network card manager obtains the virtual PCIe address of the data packet, that is, VNIC1;

S106, the control unit of the network card manager queries the mapping table saved by the storage unit through the virtual PCIe address of the data packet, and obtains the address information of the physical network card corresponding to the virtual PCIe address of the data packet, that is, PNIC1;

S108. The sending unit of the network card manager sends the data packet to the physical network card corresponding to the address information. Further, if the virtual network address corresponding to the virtual PCIe address of the data packet is Multiple, for example, the virtual network card VNIC3 corresponds to two physical network cards (PNIC2 and PNIC4), and the data packet can be sent to one of the physical network cards PNIC2 or PNIC4 by using load balancing technology.

As shown in FIG. 4, when there is uplink data transmission, the operation procedure of the method of the second embodiment of the present invention is as follows:

S200, the receiving unit of the network card manager receives the data packet from the physical network card, and assumes that the physical PCIe (Peripheral Component Interconnect Express) address of the data packet is PNIC1;

S202, the control unit of the network card manager acquires the physical PCIe address, that is, PNIC1;

S204, the control unit of the network card manager queries the mapping table saved by the storage unit through the physical PCIe address, and obtains the address information of the virtual network card corresponding to the physical PCIe address, that is, VNIC1;

S206, the network card manager temporarily saves the data packet in a cache unit corresponding to the virtual network card;

S208. After the data in the buffer unit reaches a certain condition, the DMA interrupt is regenerated, and the data is sent to the designated memory. The certain condition refers to that the cached data reaches a specified number or the time exceeds a specified time or a read request sent by the upper layer software is received. In addition, the memory address of the DMA interrupt transfer data of each virtual network card is allocated by the upper input/output memory management unit (IO MMU), so that the virtual machine VM can directly use the virtual network card instead of Interventions at the hypervisor level are required.

According to an embodiment of the present invention, a mapping relationship between a plurality of virtual network cards and a plurality of physical network cards is established by using a mapping table, and two or more virtual network cards may be mapped to one physical network card to improve utilization efficiency of the physical network card; and a virtual network card is also used. It can be mapped to multiple physical NICs. When one of the physical NICs fails, the NIC manager can offload the packets to other physical NICs that can work normally, and play the role of backup protection to improve the stability of the virtual machine system. In addition, the physical network card may be temporarily added according to the service requirement. In this case, only the mapping table of the network card manager needs to be updated, and the added physical network card is added to the mapping table, and the network card manager can split the data packet according to the updated mapping table. The flexibility and scalability of the virtual machine system is greatly enhanced.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device implementations described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed. Alternatively, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interface, device or unit. The indirect coupling or communication connection can be in electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above description is only the embodiment of the present application, and thus does not limit the scope of the patent application, and the equivalent structure or equivalent process transformation of the specification and the drawings of the present application, or directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of this application.

Claims

A method of managing a network card, comprising the following steps:

Establishing a mapping table, where the mapping table is used to save a mapping relationship between a plurality of virtual network cards and a plurality of physical network cards;

Receiving a data packet;

Querying the mapping table according to the virtual new generation peripheral component expansion interface PCIe address of the data packet, and acquiring the address information of the physical network card corresponding to the virtual PCIe address, that is, the physical PCIe address;

And forwarding the data packet to a physical network card corresponding to the virtual PCIe address.
The method according to claim 1, wherein the mapping table specifically comprises:

Virtual PCIe address, virtual MAC address, physical PCIe address, and weight information.
The method according to claim 1 or 2, wherein the step of forwarding the data packet to the physical network card corresponding to the virtual PCIe address comprises:

When the physical network card corresponding to the virtual PCIe address is one, the data packet is directly forwarded to the corresponding physical network card;

When there are multiple physical network cards corresponding to the virtual PCIe address, the data packet is sent to one physical network card of the plurality of physical network cards by using load balancing technology.
The method according to any one of claims 1 to 3, further comprising: before the step of querying the mapping table according to the virtual PCIe address, further comprising:

The NIC manager temporarily stores the data packet in the cache unit;

The NIC manager obtains the virtual PCIe address information.
A network card manager, comprising:

a receiving unit, configured to receive a data packet;

a storage unit, configured to store a network card mapping table, where the mapping table stores a mapping relationship between a plurality of virtual network cards and a plurality of physical network cards, wherein one virtual network card may also be mapped to multiple physical network cards;

a control unit, configured to query the mapping table according to the virtual new generation peripheral component expansion interface PCIe address of the data packet, and obtain address information of a physical network card corresponding to the virtual PCIe address;

And a sending unit, configured to send the data packet to a physical network card corresponding to the address information according to an instruction of the control unit.
The device according to claim 5, wherein the mapping table specifically comprises:

Virtual PCIe address, virtual MAC address, physical PCIe address, and weight information.
The device according to claim 5 or 6, wherein the control unit is further configured to:

When the physical network card corresponding to the virtual PCIe address is one, the sending unit is controlled to directly forward the data packet to the corresponding physical network card;

When there are multiple physical network cards corresponding to the virtual PCIe address, the load balancing technology is used to control the sending unit to send the data packet to one of the plurality of physical network cards.
The device according to claim 5, further comprising:

a cache unit, configured to cache the data packet;

The control unit is further configured to acquire a virtual PCIe address of the data packet.
A network card management system, comprising: a plurality of physical network cards, a plurality of virtual network cards, and a network card manager, wherein the plurality of physical network cards are connected to the network card manager, and the plurality of virtual network cards are virtualized by the network card manager. The network card manager further includes:

a receiving unit, configured to receive a data packet;

a storage unit, configured to store a network card mapping table, where the mapping table stores a mapping relationship between a plurality of virtual network cards and a plurality of physical network cards, wherein one virtual network card may also be mapped to multiple physical network cards;

a control unit, configured to query the mapping table according to the virtual new generation peripheral component expansion interface PCIe address of the data packet, and obtain address information of a physical network card corresponding to the virtual PCIe address;

And a sending unit, configured to send the data packet to a physical network card corresponding to the address information according to an instruction of the control unit.
The system of claim 9 wherein said control unit is further configured to:

When the physical network card corresponding to the virtual PCIe address is one, the sending unit is controlled to directly forward the data packet to the corresponding physical network card;

When there are multiple physical network cards corresponding to the virtual PCIe address, the load balancing technology is used to control the sending unit to send the data packet to one of the plurality of physical network cards.
The system of claim 9 or 10, wherein the network controller further comprises:

a cache unit, configured to cache the data packet;

The control unit is further configured to acquire a virtual PCIe address of the data packet.