WO2017008675A1

WO2017008675A1 - Method and device for transmitting data in virtual environment

Info

Publication number: WO2017008675A1
Application number: PCT/CN2016/089077
Authority: WO
Inventors: 李宇; 张献涛
Original assignee: 阿里巴巴集团控股有限公司
Priority date: 2015-07-16
Filing date: 2016-07-07
Publication date: 2017-01-19
Also published as: CN106354670A

Abstract

Disclosed are a method and device for transmitting data in a virtual environment. The method specifically comprises: a client device creating a first data transmission module, and a main terminal device creating a second data transmission module; the client device distributing a shared memory located in a kernel space according to the first data transmission module and allowing the main terminal device to perform a read-write operation on the shared memory; the main terminal device acquiring an access right of the shared memory; and the client device and the main terminal device performing data transmission with the shared memory via the first data transmission module and the second data transmission module respectively. By taking a shared memory located in a kernel space as a transfer station for transmitting data, a data transmission rate is high, the operation is simple and few system resources are occupied.

Description

Method and device for transmitting data in virtualized environment

The present application claims priority to Chinese Patent Application No. 201510418471.9, entitled "A Method and Apparatus for Transmitting Data in a Virtualized Environment", filed on July 16, 2015, the entire contents of which are incorporated by reference. In this application.

Technical field

The present application relates to the field of computers, and in particular, to a technology for transmitting data in a virtualized environment.

Background technique

In a virtualized environment, data is typically transferred between the host and the virtual machine over the network. However, when there is a problem in the network, there are two technical solutions in the prior art that can realize data transmission between the host computer and the virtual machine, one is through a serial port transmission method, and the other is through hot plugging and unplugging the disk. There are some drawbacks to the scheme.

The transmission rate of serial devices is usually low, so the serial transmission mode cannot meet the requirements of fast data transmission. Hot swapping a disk requires creating a virtual disk in the host. First insert the virtual disk into the host, copy the data to be transferred to the virtual disk, and then unplug the virtual disk from the host. Go to the virtual machine, copy the data to be transferred from the virtual disk to the virtual machine, and then pull out the virtual disk, so that the data transmission from the host to the virtual machine can be completed. It can be seen that the method of hot swapping a disk involves hot swapping of multiple devices, and the number of times of copying data is large, and the operation steps are too cumbersome, resulting in excessive system overhead.

Summary of the invention

The technical problem to be solved by the present application is how to transmit data in a virtualized environment, how to increase the transmission rate, and simplify the operation steps to reduce system overhead.

To solve the above technical problem, the present application provides a method for transmitting data in a virtual environment on a client device side, where the method includes: creating a first data transmission module; and allocating according to the first data transmission module a shared memory, and the shared memory allows the primary device to perform a read/write operation; and the first data transmission module performs data transmission with the shared memory, wherein the performing data transmission includes at least one of the following: The first to-be-transmitted data is stored in the shared memory, and the second to-be-transmitted data stored by the primary-end device in the shared memory is obtained.

Further, storing the first to-be-transmitted data in the shared memory includes: reading the first to-be-transmitted data into a user space; and copying the first to-be-transmitted data from the user space to a location in a kernel space The shared memory.

Further, copying the first to-be-transmitted data from the user space to the sharing located in a kernel space The memory includes: copying, according to the related capacity information of the shared memory, the first to-be-transmitted data read to the user space into the shared memory located in a kernel space; wherein, after each copy, Sending a first data transmission message to the primary device; after acquiring the first data read message returned by the primary device, performing the next copy until the transmission is completed.

Further, acquiring the second to-be-transmitted data stored by the primary-end device in the shared memory includes: reading a second to-be-transmitted data stored by the primary-end device in the shared memory; and reading the second Copying the data to be transmitted to the user space; storing the second data to be transmitted copied to the user space to the storage medium.

Further, reading the second to-be-transmitted data stored by the primary-end device in the shared memory includes: reading, according to the second data transmission message sent by the primary-end device, that the primary-end device is stored in the sharing a second data to be transmitted of the memory; after the reading is completed, returning a second data read message to the primary device.

Further, the method further includes: performing transmission event communication with the primary device before performing data transmission by the first data transmission module and the shared memory, and performing transmission event communication includes at least one of the following: Sending, to the primary device, first data information about the first to-be-transmitted data; and acquiring, by the primary device, second data information about the second to-be-transmitted data.

According to an aspect of the present application, the present application provides a method for transmitting data in a virtual environment on a primary device side, wherein the method includes: creating a second data transmission module; acquiring a shared allocated by the client device Accessing the memory, so that the shared memory allows the primary device to perform a read/write operation; and the second data transmission module performs data transmission with the shared memory, wherein the performing data transmission includes at least one of the following Obtaining, by the client device, the first to-be-transmitted data stored in the shared memory, and storing the second to-be-transmitted data in the shared memory.

Further, storing the second to-be-transmitted data in the shared memory includes: reading the second to-be-transmitted data into a user space; and copying the second to-be-transmitted data from the user space to a location in a kernel space The shared memory.

Further, copying the second to-be-transmitted data from the user space to the shared memory located in a kernel space includes: reading the read to the user space based on related capacity information of the shared memory The second to be transmitted data is copied to the shared memory located in the kernel space; wherein, after each copy, the second data transmission message is sent to the client device; when the second device returns the second device After the data is read, the next copy is made until the transfer is complete.

Further, acquiring the first data to be transmitted that is stored by the client device in the shared memory includes: reading, by the client device, first data to be transmitted stored in the shared memory; Copy the data to be transferred to User space; storing the first to-be-transmitted data copied to the user space to a storage medium.

Further, reading the first data to be transmitted stored by the client device in the shared memory includes: reading, according to the first data transmission message sent by the client device, the client device being stored in the sharing The first data to be transmitted of the memory; after the reading is completed, returning the first data read message to the client device.

Further, the method further includes: performing transmission event communication with the client device before performing data transmission by the second data transmission module and the shared memory, and performing transmission event communication includes at least one of the following: Sending, to the client device, second data information about the second to-be-transmitted data; acquiring first data information about the first to-be-transmitted data sent by the client device.

According to another aspect of the present application, the present application provides an apparatus for performing data transmission in a virtual environment, where the apparatus includes: a client creation apparatus for creating a first data transmission module; a client allocation apparatus, And configured to allocate a shared memory according to the first data transmission module, and the shared memory allows the primary device to perform a read/write operation; and the client data transmission device is configured to pass the first data transmission module and the shared memory Performing data transmission, wherein the client data transmission device includes at least one of the following: a client data storage unit, configured to store the first to-be-transmitted data in the shared memory, a client data acquisition unit, And configured to acquire second to-be-transmitted data stored by the primary device in the shared memory.

Further, the client data storage unit includes: a subunit for reading the first data to be transmitted to the user space; and copying the first data to be transmitted from the user space to the kernel The subunit of the shared memory of space.

Further, the subunit for copying the first to-be-transmitted data from the user space to the shared memory located in a kernel space includes: configured to use the related capacity information based on the shared memory And reading, by the sub-unit of the shared memory located in the kernel space, the sub-units of the shared memory that are read into the user space; and sending, by each copy, the first data transmission message to the primary end device a subunit; a subunit for performing the next copy until the transmission is completed after acquiring the first data read message returned by the primary device.

Further, the client data obtaining unit includes: a subunit for reading the second data to be transmitted stored by the master device in the shared memory; and configured to copy the read second data to be transmitted a subunit to the user space; a second unit to be used for storing the copy to the user space to the subunit of the storage medium.

Further, the subunit for reading the second data to be transmitted stored by the primary device in the shared memory includes: a second data transmission message reading station according to the primary device a subunit of the second data to be transmitted stored by the master device in the shared memory; a subunit for returning a second data read message to the master device after the reading is completed.

Further, the device further includes: a client communication device, configured to perform transmission event communication with the primary device before performing data transmission with the shared memory by the first data transmission module, where The client communication device includes at least one of the following: a client information sending unit, configured to send first data information about the first data to be transmitted to the primary device, and a client information acquiring unit, configured to acquire And second data information about the second data to be transmitted sent by the primary device.

According to another aspect of the present disclosure, the present application provides an apparatus for performing data transmission in a virtual environment, where the apparatus includes: a primary end creating device for creating a second data transmission module; a primary end allocation device, The access authority for obtaining the shared memory allocated by the client device, so that the shared memory allows the master device to perform read and write operations; and the primary data transmission device is configured to share with the second data transmission module The data transmission is performed by the memory, wherein the primary data transmission device includes at least one of the following: a primary data acquisition unit, configured to acquire first data to be transmitted stored in the shared memory by the client device, and the primary end a data storage unit, configured to store the second to-be-transmitted data in the shared memory.

Further, the primary data storage unit includes: a subunit for reading the second data to be transmitted to the user space; and copying the second data to be transmitted from the user space to the kernel The subunit of the shared memory of space.

Further, the subunit for copying the second data to be transmitted from the user space to the shared memory located in a kernel space includes: configured to use the related capacity information based on the shared memory And reading, by the sub-unit of the shared memory located in the kernel space, for each second copy, sending a second data transmission message to the client device after each copy a subunit; a subunit for performing a next copy until the transfer is completed after acquiring the second data read message returned by the guest device.

Further, the primary data obtaining unit includes: a subunit for reading the first data to be transmitted stored by the client device in the shared memory; and configured to copy the read first data to be transmitted a subunit to the user space; the first to be transmitted data for copying the copy to the user space to a subunit of the storage medium.

Further, the subunit for reading the first data to be transmitted stored by the client device in the shared memory includes: a first data transmission message reading station according to the client device a subunit of the first data to be transmitted stored in the shared memory by the client device; and a subunit for returning the first data read message to the guest device after the reading is completed.

Further, the device further includes: a primary communication device, configured to perform transmission event communication with the client device before performing data transmission with the shared memory by the second data transmission module, where The primary communication device includes at least one of: a primary information transmitting unit, configured to send, to the client device, the The second data information of the second data to be transmitted; the primary information acquiring unit is configured to acquire first data information about the first data to be transmitted sent by the client device.

Compared with the prior art, in one embodiment of the present application, the client device creates a first data transmission module, and the primary device creates a second data transmission module, the first data transmission module and the second data transmission module. Providing a data transmission channel between the user space of the client device and the user space of the host device; the client device allocates a shared memory located in the kernel space according to the first data transmission module, and allows the primary terminal The device reads and writes the shared memory, and the primary device acquires access rights of the shared memory; the client device and the primary device respectively pass the first data transmission module and the second The data transmission module performs data transmission with the shared memory. Specifically, the client device stores the first to-be-transmitted data in the shared memory, and the primary device obtains the storage of the client device. The first to-be-transmitted data of the shared memory, the primary device stores the second to-be-transmitted data in the shared memory, and the guest device acquires the primary Data stored in the second device to be transmitted to the shared memory.

In this way, the shared memory located in the kernel space is used as the transfer station to transmit data, which greatly improves the data transmission rate compared with the existing serial port transmission mode, and the operation is relatively simple compared with the existing hot-swappable disk method. System resources are used less.

DRAWINGS

Other features, objects, and advantages of the present application will become more apparent from the detailed description of the accompanying drawings.

1 illustrates a client device for data transmission in a virtual environment, in accordance with an embodiment of an aspect of the present application;

2 illustrates a client data transmission device of a client device for performing data transmission in a virtual environment, in accordance with a preferred embodiment of an aspect of the present application;

3 illustrates a client device for data transmission in a virtual environment in accordance with a preferred embodiment of an aspect of the present application;

4 illustrates a primary device for performing data transmission in a virtual environment, in accordance with an embodiment of an aspect of the present application;

FIG. 5 illustrates a primary end data transmission device of a primary end device for performing data transmission in a virtual environment according to a preferred embodiment of an aspect of the present application; FIG.

6 illustrates a data transmission in a virtual environment in accordance with a preferred embodiment of an aspect of the present application. Master device

FIG. 7 is a schematic diagram showing a cooperation between a client device and a master device for performing data transmission in a virtual environment according to an embodiment of an aspect of the present application; FIG.

FIG. 8 illustrates a flow chart of a method for transmitting data in a virtual environment on a client device side according to an embodiment of another aspect of the present application; FIG.

FIG. 9 is a flowchart of a method for transmitting data in a virtual environment on a primary device side according to an embodiment of another aspect of the present application; FIG.

FIG. 10 illustrates a flow chart of a method for transmitting data in a virtual environment, in accordance with an embodiment of another aspect of the present application.

The same or similar reference numerals in the drawings denote the same or similar components.

detailed description

The present application is further described in detail below with reference to the accompanying drawings.

1 shows a client device 1 for data transmission in a virtual environment, wherein the client device 1 includes a client creation device 11, a client distribution device 12, and a client, in accordance with an embodiment of an aspect of the present application. Data transmission device 13.

Specifically, the client creating device 11 creates a first data transmission module; the client allocation device 12 allocates a shared memory according to the first data transmission module, and the shared memory allows the primary device to perform read and write operations. The client data transmission device 13 performs data transmission with the shared memory through the first data transmission module.

Here, the client device 1 includes an electronic device capable of automatically performing numerical calculation and information processing according to an instruction set or stored in advance, the hardware of which includes but is not limited to a microprocessor, an application specific integrated circuit (ASIC), Programmable gate array (FPGA), digital processor (DSP), embedded devices, etc. The client device 1 can also be a collection of computer data and instructions organized in a series of sequences. In addition, the client device may also be a combination of a collection of computer data and instructions organized in a specific order and electronic devices capable of automatically performing numerical calculations and information processing in accordance with pre-set or stored instructions. A person skilled in the art should understand that the client device 1 is only an example, and other existing or future client devices 1 may be included in the application, and should be included in the scope of the present application. It is included here by reference.

The above devices are continuously working. Here, those skilled in the art should understand that "continuous" refers to the above-mentioned respective devices respectively in real time or according to the set or real-time adjusted working mode requirements, for example, the client is created. The device 11 creates a first data transmission module, and the first data transmission module created by the client creation device 11 is continuously used by the client distribution device 12 and the client data transmission device 13, the client distribution device 12 continuous roots According to the first data transmission module, a shared memory is allocated, and the shared memory allows the primary device to perform read and write operations, and the client data transmission device 13 continues to perform the first data transmission module and the shared memory. Data is transmitted until the guest device 1 stops working.

In a specific embodiment, in a virtualized environment, the guest device may be a guest virtual machine (guest), and the primary device may be a privileged virtual machine (host), and one or more non-privileged levels may be implemented by the privileged virtual machine. Management of customer virtual machines.

The client creation device 11 creates a first data transmission module.

The first data transmission module includes a guest virtual device and a client driver. The creating of the first data transmission module by the client creation device 11 includes: creating a guest virtual device and loading a client driver of the guest virtual device.

Further, the client creating device 11 adds a client virtual device by modifying a corresponding logic according to a type of a hypervisor of the host, where the guest virtual device is used between the kernel space and the user space, and the guest and the host. Communication between kernel spaces. Specifically, in the creation phase of the guest, the client creation device 11 can directly add the guest virtual device by using the created method. If the guest already exists, the client creation device 11 can use the hot plug method to increase the client. Virtual device.

Here, the virtual memory of the operating system of the guest device (for example, the Linux operating system) is divided into kernel space and user space, and the core software running in the kernel space has all the rights to access the hardware device, and has a higher privilege level; Ordinary applications in user space can only see some of the system resources that they are allowed to use, and cannot use certain system features or direct access to kernel space and hardware devices.

Therefore, the created first data transmission module provides a data transmission channel between the kernel space and the user space, which facilitates the smooth progress of subsequent data transmission.

The client allocation device 12 allocates a shared memory according to the first data transmission module, and the shared memory allows the primary device to perform read and write operations.

In a specific embodiment, when the guest driver in the first data transmission module detects the guest virtual device, a shared memory is allocated, the shared memory is located in the kernel space, and the second data transmission module of the primary device is allowed. The master driver in the access accesses the shared memory. Specifically, when the guest driver in the first data transmission module detects the guest virtual device, allocate a transmission page for data transmission, and allocate a control page for controlling data transmission, where the transmission page and the location are The control page is the shared memory page.

Here, the shared memory located in the kernel space is used as a transfer station to transmit data, which greatly improves the data transfer rate compared with the existing serial port transmission mode, and is simpler in operation than the existing hot-swappable disk. Correct System resources are used less.

Referring to FIG. 2, the client data transmission device 13 performs data transmission with the shared memory through the first data transmission module, and the client data transmission device 13 includes a client data storage unit 131 and client data acquisition. At least one of the units 132, wherein the client data storage unit 131 stores the first to-be-transmitted data in the shared memory, and the client data acquiring unit 132 acquires the primary device storage The second data to be transmitted in the shared memory.

Here, the client data storage unit 131 is configured to send the first data to be transmitted to the primary device, where the client data acquiring unit 132 is configured to receive the second data to be transmitted sent by the primary device. . The client data transmission device 13 may only include the client data storage unit 131, that is, send the first data to be transmitted to the master device; the client data transmission device 13 may also include only the client. The data acquiring unit 132 receives the second data to be transmitted sent by the primary device; the client data transmitting device 13 may further include the client data storage unit 131 and the client data acquiring unit 132. That is, sending the first to-be-transmitted data to the primary end device and receiving the second to-be-transmitted data sent by the primary-end device simultaneously.

Specifically, the client data storage unit 131 may include: a subunit for reading the first data to be transmitted to the user space; and copying the first data to be transmitted from the user space to A subunit of the shared memory located in kernel space.

Here, the client data storage unit 131 reads the first data to be transmitted from the storage medium of the client device 1 to the user space of the client device in the memory, and the shared memory is located in the kernel space of the memory, so The first to-be-transmitted data is copied from the user space to the shared memory.

Specifically, the subunit for copying the first to-be-transmitted data from the user space to the shared memory located in a kernel space includes: for using the related capacity information of the shared memory, And reading, by the sub-unit of the shared memory located in the kernel space, the sub-units of the shared memory that are read into the user space; and sending, by each copy, the first data transmission message to the primary end device a subunit; a subunit for performing the next copy until the transmission is completed after acquiring the first data read message returned by the primary device.

Here, the related capacity information of the shared memory may include, but is not limited to, the size of the transmission page for data transmission, and the size of the transmission page SIZET=the number of sub-pages TP×sub-page size PAGESIZE. Preferably, when the first to-be-transmitted data is copied from the user space to the shared memory, the copying is performed in units of the transmission page.

Assuming that the size of the first data to be transmitted is N, the size of the data transmitted by the client data transmission device 13 is ALREADY, the initial value is 0, and the number of free subpages of the transmission page SEND1 is FREE, and the number of the subpage number A is The initial value is 0, and the process of copying the first to-be-transmitted data from the client data transmission device 13 to the shared memory is as follows:

The first step is to determine whether the LEFT is 0 according to the size of the first untransmitted portion of the data to be transmitted, LEFT=N−ALREADY, and if yes, the transmission of the first data to be transmitted on the client device end has ended. , determining, by subsequent steps, whether data can be copied to the shared memory;

In the second step, it is determined whether the size LEFT of the untransferred portion of the first to-be-transmitted data is greater than or equal to the size SIZET of the transmission page SEND1, and if so, the size of the data to be copied is INPUT=SIZET, and if not, the copy is to be copied. The size of the data is INPUT=LEFT, that is, the maximum size of SIZET data is copied at a time;

The third step is to determine whether the size of the data to be copied INPUT is greater than or equal to the subpage size PAGESIZE, and if so, then go to the fourth step, and if not, go to the fifth step;

In the fourth step, the data of the PAGESIZE size is copied to the transmission page SEND1, and the address of the subpage in the shared memory is ADDR=0, and the length of the subpage LEN_SIZE=PAGESIZE and its subpage number A are placed in the control page. Medium, then execute INPUT-=PAGESIZE, A=(++A)>=TP? 0: A, that is, the data to be copied is equal to the new value after subtracting the size of the sub-page. After the page number A is incremented by 1, it is judged whether the maximum number of sub-pages TP of the transmission page SEND1 is reached. If A reaches TP, the value A is assigned to 0, and then third step;

In the fifth step, the data of the INPUT size is copied to the transmission page SEND1, and the address of the subpage in the shared memory is ADDR=0, and the length of the subpage LEN_SIZE=INPUT and its subpage number A are placed in the control page. Medium, then execute A=(++A)>=TP? 0: A, that is, after the page number A is incremented by 1, it is judged whether the maximum number of sub-pages TP of the transmission page SEND1 is reached, and if A reaches TP, A is assigned a value of 0, and then the sixth step is performed;

The sixth step is to execute ALREADY+=the size of the data copied to the shared memory, FREE-=the number of subpages used this time, that is, the data size ALREADY sent by the client data transmission device 13 is equal to the copy. a new value after the data size of the shared memory, the number of free subpages of the transmission page SEND1 is equal to the new value after subtracting the number of subpages used this time; and then sending the first data to the primary device Transmitting a message to notify the primary device to read the data copied to the shared memory, and after obtaining the first data read message returned by the primary device, perform FREE=TP, and then switch to the first step.

A person skilled in the art should understand that the above method for copying the first data to be transmitted from the user space to the shared memory is only an example, and other existing or future possible copies of the first to-be-transmitted data from the user space to the sharing may occur. The method of memory, as applicable to the present application, is also intended to be included within the scope of the present application and is hereby incorporated by reference.

Specifically, the client data obtaining unit 132 includes: configured to read, that the master device is stored in the sharing a subunit of the second data to be transmitted in the memory; a subunit for copying the read second data to be transmitted to the user space; and storing the second data to be transmitted copied to the user space to the storage medium Subunit.

Here, the client data obtaining unit 132 copies the second data to be transmitted sent by the master device from the shared memory to the user space, and then copies the data from the user space to the storage medium. The storage medium refers to a non-volatile storage medium such as, but not limited to, a hard disk, an optical disk, a USB flash drive, an SD card, or the like.

Specifically, the subunit for reading the second data to be transmitted stored by the primary device in the shared memory includes: a second data transmission message reading station according to the primary device a subunit of the second data to be transmitted stored by the master device in the shared memory; a subunit for returning a second data read message to the master device after the reading is completed.

For example, if the size of the second data to be transmitted is N, the data size received by the client data transmission device 13 is GET, and the initial value is 0, and the second data to be transmitted is copied from the shared memory to the client. The flow of the data transmission device 13 is as follows:

In the first step, it is determined whether the equation GET==N is true, that is, whether the data size GET received by the client data transmission device 13 is equal to the size N of the second data to be transmitted, and if so, the client device 1 has completed the pair. Reading the second data to be transmitted, and returning a second data read message to the primary device; if not, proceeding to the second step;

In the second step, waiting for the second data transmission message sent by the primary device, after receiving the second data transmission message sent by the primary device, according to the length LEN_SLICE of the transmission page RECEIVE1 in the control page, and transmitting The page RECEIVE1 subpage number and the information of the address ADDR of the transmission page RECEIVE1 in the shared memory are sequentially processed and the data in the transmission page RECEIVE1 is copied to the user space, and the client data obtaining unit 132 copies the content to the user space. The second data to be transmitted is stored to the storage medium, and then GET+=the size of the data acquired from the shared memory, that is, the data size GET received by the client data transmission device 13 is equal to the current shared memory. The new value after the obtained data size is returned to the primary device to return a second data read message, and then the first step is taken.

Those skilled in the art should understand that the above method for copying the second data to be transmitted from the shared memory to the user space is only an example, and other existing or future possible copies of the second data to be transmitted are copied from the shared memory to the user space. The method is applicable to the present application and is also included in the scope of the present application, and is hereby incorporated by reference.

3 illustrates a client device 1 for data transmission in a virtual environment, wherein the client device 1 includes a client creation device 11', a client distribution device, in accordance with a preferred embodiment of an aspect of the present application, 12', the client data transmission device 13' and the client communication device 14'.

Here, the content of the client creation device 11', the client distribution device 12', the client data transmission device 13', and the client creation device 11, the client distribution device 12, and the client data transmission device 13 in FIG. The same or basically the same, for the sake of brevity, no longer repeat them.

The client communication device 14' performs transmission event communication with the primary device before performing data transmission with the shared memory by the first data transmission module. Specifically, the client communication device includes at least one of a client information transmitting unit (not shown) and a client information acquiring unit (not shown), wherein the client information is transmitted. The unit sends the first data information about the first data to be transmitted to the primary device, where the client information obtaining unit acquires the second data about the second data to be transmitted sent by the primary device. information.

Here, the first to-be-transmitted data is transmitted to the storage device in the form of a file, and the first data information includes a storage path of the file, a name of the file, and a length of the file. After the second to-be-transmitted data is transmitted to the client device, it is stored in a storage medium in a file format, and the second data information includes a storage path of the file, a name of the file, and a length of the file. By the client communication device performing transmission event communication with the primary device before the data transmission starts, some low-level errors similar to repeated transmission can be avoided, and the data transmission success rate is effectively improved.

For example, assume that in the Xen virtualization environment, the client device 1 communicates with the host device for event communication: the transfer command can be placed in a xenstore (a storage device in the Xen virtual environment, and the xenstore is completed based on the event channel). The transfer command includes the first data information and notifies the host device that a new command exists. The master device obtains a transmission command from the xenstore, extracts the first data information, and first checks whether the storage path of the file in the first data information already exists, and if yes, returns an error, and notifies the client device 1 of the corresponding error. The information then ends the transmission; if not, the file is created according to the storage path of the file in the first data information, and the client device 1 is notified that the transmission command has been accepted and the processing is normal.

4 illustrates a primary device 2 for performing data transmission in a virtual environment, wherein the primary device 2 includes a primary device 25, a primary device 26, and a primary device, in accordance with an embodiment of an aspect of an aspect of the present application. Data transmission device 27.

Specifically, the primary end creating device 25 creates a second data transmission module; the primary end allocation device 26 acquires access rights of the shared memory allocated by the guest device, so that the shared memory allows the primary device to read and write. The primary data transmission device 27 performs data transmission with the shared memory through the second data transmission module.

Here, the master device 2 includes an automatic numerical meter capable of automatically setting or storing the instructions in advance. Electronic devices for computing and information processing, including but not limited to microprocessors, application specific integrated circuits (ASICs), programmable gate arrays (FPGAs), digital processors (DSPs), embedded devices, and the like. The primary device 2 can also be a collection of computer data and instructions organized in a sequence of specific sequences. Furthermore, the master device 2 may also be a combination of a collection of computer data and instructions organized in a specific sequence and electronic devices capable of automatically performing numerical calculations and information processing in accordance with pre-set or stored instructions. Those skilled in the art should understand that the primary device 2 is merely an example, and other existing or future primary devices 2 may be applicable to the present application, and should also be included in the protection scope of the present application. It is included here by reference.

The above-mentioned devices are continuously working. Here, those skilled in the art should understand that "continuous" refers to the above-mentioned respective devices respectively in real time or according to the set or real-time adjusted working mode requirements, for example, the primary end is created. The device 25 creates a second data transmission module, the second data transmission module created by the primary terminal creation device 25 is continuously used by the primary distribution device 26 and the primary data transmission device 27, the primary distribution device 26 continuously obtaining access rights of the shared memory allocated by the client device, so that the shared memory allows the master device to perform read and write operations, and the master data transmission device 27 continues to pass the second data transmission module and the The shared memory performs data transfer until the primary device 2 stops working.

Further, the primary end creating device 25 creates a second data transmission module.

The second data transmission module includes a primary virtual device and a primary drive. The creating, by the primary end creating device 25, the second data transmission module includes: creating a primary virtual device and loading a primary driver of the primary virtual device.

Further, the primary end creating device 25 increases the primary virtual device by modifying the corresponding logic according to the type of the hypervisor of the host, and the primary virtual device is used between the kernel space and the user space and the host and the guest. Communication between kernel spaces.

Here, the virtual memory of the operating system of the primary device (for example, the Linux operating system) is divided into kernel space and user space, and the core software running in the kernel space has all the rights to access the hardware device, and has a higher privilege level; Ordinary applications in user space can only see some of the system resources that they are allowed to use, and cannot use certain system features or direct access to kernel space and hardware devices.

Therefore, the created second data transmission module provides a data transmission channel between the kernel space and the user space, which facilitates the smooth progress of subsequent data transmission.

The primary distribution device 26 obtains access rights of the shared memory allocated by the client device, so that the shared memory allows the primary device to perform read and write operations.

In a specific embodiment, the guest driver in the first data transmission module of the client device allocates a shared memory when detecting the guest virtual device, the shared memory is located in the kernel space, and allows the second data transmission module The master driver in the access accesses the shared memory. Specifically, when the guest driver in the first data transmission module detects the guest virtual device in the first data transmission module, allocate a transmission page for data transmission, and allocate a control page for controlling data transmission. The transfer page and the control page are both the shared memory page.

Here, the shared memory located in the kernel space is used as a transfer station to transmit data, which greatly improves the data transfer rate compared with the existing serial port transmission mode, and is simpler in operation than the existing hot-swappable disk. Less use of system resources.

Referring to FIG. 5, the primary data transmission device 27 performs data transmission with the shared memory through the second data transmission module, and the primary data transmission device 27 includes a primary data storage unit 271 and a primary data acquisition. At least one of the unit 272, wherein the primary data storage unit 271 acquires the first data to be transmitted stored by the client device in the shared memory, and the primary data acquiring unit 272 The two to-be-transmitted data is stored in the shared memory.

Here, the primary data storage unit 271 is configured to receive the first data to be transmitted sent by the client device, and the primary data acquiring unit 272 is configured to send the second data to be transmitted to the client device. . The primary data transmission device 27 may include only the primary data storage unit 271, that is, receive the first to-be-transmitted number sent by the client device; the primary data transmission device 27 may also include only the The primary data acquiring unit 272 sends the second data to be transmitted to the client device. The primary data transmitting device 27 may further include the primary data storage unit 271 and the primary data acquiring unit 272. That is, receiving the first to-be-transmitted data sent by the client device and transmitting the second to-be-transmitted data to the client device simultaneously.

Specifically, the primary data storage unit 271 may include: a subunit for reading the second data to be transmitted to the user space; and copying the second data to be transmitted from the user space to A subunit of the shared memory located in kernel space.

Here, the primary data storage unit 271 reads the second data to be transmitted from the storage medium of the primary device 2 to the user space of the primary device in the memory, and the shared memory is located in the kernel space of the memory, so The second to-be-transmitted data is copied from the user space to the shared memory.

Specifically, the subunit for copying the second to-be-transmitted data from the user space to the shared memory located in a kernel space includes: for using the related capacity information of the shared memory, Read to The second to-be-transmitted data of the user space is copied to the sub-unit of the shared memory located in the kernel space; for each copy, the sub-unit of the second data transmission message is sent to the client device; After obtaining the second data read message returned by the client device, the next copy is performed until the subunit is completed.

Here, the related capacity information of the shared memory may include, but is not limited to, the size of the transmission page for data transmission, and the size of the transmission page SIZET=the number of sub-pages TP×sub-page size PAGESIZE. Preferably, when the second to-be-transmitted data is copied from the user space to the shared memory, the copying is performed in units of the transmission page.

Assuming that the size of the second data to be transmitted is N, the data size transmitted by the primary data transmission device 27 is ALREADY, the initial value is 0, the number of free subpages of the transmission page SEND2 is FREE, and the initial value of the subpage number A is The process of copying the second data to be transmitted from the primary data transmission device 27 to the shared memory is as follows:

The first step is to determine whether the LEFT is 0 according to the size of the untransmitted portion of the second data to be transmitted, LEFT=N−ALREADY, and if yes, the transmission of the second data to be transmitted on the primary device end has ended. , determining, by subsequent steps, whether data can be copied to the shared memory;

In the second step, it is determined whether the size LEFT of the untransferred portion of the second to-be-transmitted data is greater than or equal to the size SIZET of the transmission page SEND2, and if so, the size of the data to be copied is INPUT=SIZET, and if not, the copy is to be copied. The size of the data is INPUT=LEFT, that is, the maximum size of SIZET data is copied at a time;

In the fourth step, the data of the PAGESIZE size is copied to the transmission page SEND2, and the address of the subpage in the shared memory is ADDR=0, and the length of the subpage LEN_SIZE=PAGESIZE and its subpage number A are placed in the control page. Medium, then execute INPUT-=PAGESIZE, A=(++A)>=TP? 0: A, that is, the data to be copied is equal to the new value after subtracting the size of the subpage. After the page number A is incremented by 1, it is judged whether the maximum number of subpages TP of the transmission page SEND2 is reached. If A reaches TP, the value A is assigned to 0, and then third step;

In the fifth step, the data of the INPUT size is copied to the transmission page SEND2, and the address of the subpage in the shared memory is ADDR=0, and the length of the subpage LEN_SIZE=INPUT and its subpage number A are placed in the control page. Medium, then execute A=(++A)>=TP? 0: A, that is, after the page number A is incremented by 1, it is judged whether the maximum number of sub-pages TP of the transmission page SEND2 is reached, and if A reaches TP, A is assigned a value of 0, and then the sixth step is performed;

The sixth step is to execute ALREADY+=the size of the data copied to the shared memory, FREE-=the number of subpages used this time, that is, the data size ALREADY sent by the primary data transmission device 27 is equal to the copy. The new value after the data size of the shared memory, the number of free subpages of the transmission page SEND2 is equal to the new value after subtracting the number of subpages used this time; then sending the second to the client device Transmitting a message to notify the client device to read the data copied to the shared memory, and after obtaining the second data read message returned by the client device, performing FREE=TP, and then transferring step.

A person skilled in the art should understand that the above method for copying the second data to be transmitted from the user space to the shared memory is only an example, and other existing or future possible copies of the second data to be transmitted are copied from the user space to the shared space. The method of memory, as applicable to the present application, is also intended to be included within the scope of the present application and is hereby incorporated by reference.

Specifically, the primary data storage unit 271 includes: a subunit for reading the first data to be transmitted stored by the guest device in the shared memory; and the first data to be transmitted to be read Copying to a subunit of the user space; storing the first data to be transmitted copied to the user space to a subunit of the storage medium.

Here, the primary data storage unit 271 copies the first data to be transmitted sent by the client device from the shared memory to the user space, and then copies the data from the user space to the storage medium. The storage medium refers to a non-volatile storage medium such as, but not limited to, a hard disk, an optical disk, a USB flash drive, an SD card, or the like.

Specifically, the subunit for reading the first data to be transmitted stored by the client device in the shared memory includes: a first data transmission message reading station according to the client device a subunit of the first data to be transmitted stored in the shared memory by the client device; a subunit for returning the first data read message to the guest device after the reading is completed.

For example, if the size of the first data to be transmitted is N, the data size received by the primary data transmission device 27 is GET, and the initial value is 0, and the first data to be transmitted is copied from the shared memory to the primary end. The flow of the data transfer device 27 is as follows:

In the first step, it is determined whether the equation GET==N is true, that is, whether the data size GET received by the primary data transmission device 27 is equal to the size N of the first data to be transmitted, and if so, the primary device 2 has completed the pair. Reading the first data to be transmitted, and returning a first data read message to the client device, and if not, proceeding to the second step;

In the second step, waiting for the first data transmission message sent by the client device, after receiving the first data transmission message sent by the client device, according to the length of the transmission page RECEIVE2 in the control page, LEN_SLICE, transmission The page RECEIVE2 subpage number and the information such as the address ADDR of the transmission page RECEIVE2 in the shared memory are sequentially processed and the data in the transmission page RECEIVE2 is copied to the user space, and the first data to be transmitted copied to the user space is stored to the storage. Media, then perform GET+= the size of the data acquired from the shared memory this time, that is, the data size GET that the primary data transmission device 27 has received is equal to the current The new value after the size of the data acquired in the shared memory returns a first data read message to the client device, and then proceeds to the first step.

Those skilled in the art should understand that the above method for copying the first data to be transmitted from the shared memory to the user space is only an example, and other existing or future possible copies of the first to-be-transmitted data from the shared memory to the user space may occur. The method is applicable to the present application and is also included in the scope of the present application, and is hereby incorporated by reference.

6 shows a master device 2 for performing data transmission in a virtual environment, wherein the master device 2 includes a master device 25', a master device, according to a preferred embodiment of an aspect of the present application. 26', the primary data transmission device 27' and the primary communication device 28'.

Here, the content of the primary end creating device 25', the primary distributing device 26', the primary data transmitting device 27', and the primary end creating device 25, the primary distributing device 26, and the primary data transmitting device 27 in FIG. The same or basically the same, for the sake of brevity, no longer repeat them.

The primary communication device 28' performs transmission event communication with the guest device prior to data transmission by the second data transmission module and the shared memory. Specifically, the primary communication device includes at least one of a primary information transmitting unit (not shown) and a primary information acquiring unit (not shown), wherein the primary information is sent. The unit sends the second data information about the second data to be transmitted to the client device, where the master information acquiring unit acquires the first data about the first data to be transmitted sent by the client device. information.

Here, after the second to-be-transmitted data is transmitted to the client device, it is stored in a storage medium in a file format, and the second data information includes a storage path of the file, a name of the file, and a length of the file. After the first to-be-transmitted data is transmitted to the primary device, the file is stored in a storage medium in a file format, and the first data information includes a storage path of the file, a name of the file, and a length of the file. By the primary communication device performing transmission event communication with the client device before the data transmission starts, some low-level errors similar to repeated transmission can be avoided, and the data transmission success rate is effectively improved.

For example, assume that in the Xen virtualization environment, the primary end device 2 communicates with the guest device for event communication: the transfer command can be placed in a xenstore (a storage device in the Xen virtual environment, and the xenstore is completed based on the event channel). The transmission command includes the second data information and notifies the client device that there is a new command. The client device obtains a transmission command from the xenstore, extracts the second data information, and first checks whether the storage path of the file in the second data information already exists, and if yes, returns an error, and notifies the primary device 2 of the corresponding error. Information, then ending the transmission; if not, creating a file according to the storage path of the file in the second data information, And notify the master device 2 that the transfer command has been accepted and the processing is normal.

FIG. 7 illustrates a schematic diagram of a client device 1 cooperating with a master device 2 for data transmission in a virtual environment, in accordance with an embodiment of an aspect of the present application. The client device 1 includes a client creating device 11", a client device 12" and a client data transmitting device 13", the master device 2 including a master creating device 25", a master distributing device 26" and Primary data transmission device 27". The client creating device 11" of the client device 1 creates a first data transmission module; the master device creating device 25" of the master device 2 creates a second data transmission module; the client device 12" of the client device 1 according to the The first data transmission module allocates a shared memory, and the shared memory allows the primary device 2 to perform read and write operations; the primary distribution device 26" of the primary device 2 acquires access rights of the shared memory allocated by the client device 1, So that the shared memory allows the primary device 2 to perform read and write operations; the client data transmission device 13" of the client device 1 performs data transmission with the shared memory through the first data transmission module, the client data The transmission device 13" includes at least one of a client data storage unit and a client data acquisition unit, wherein the client data storage unit stores the first to-be-transmitted data in the shared memory, The client data acquiring unit acquires the second data to be transmitted stored by the master device 2 in the shared memory; the master data transmitting device 27" of the master device 2 passes the second data transmitting module and the Shared memory for data transmission, the primary data transmission device 27" includes at least one of a primary data storage unit and a primary data acquisition unit, wherein the primary data storage unit acquires the client device 1 stored in The first to-be-transmitted data of the shared memory, the primary-end data acquiring unit stores the second to-be-transmitted data in the shared memory. Here, the client creation device 11", the client distribution device 12", the client data transmission device 13" of the client device 1 and the client creation device 11 of the client device 1 in FIG. 1, the client distribution device 12, The contents of the client data transmission device 13 are the same or substantially the same, and the master terminal creating device 25", the master terminal distributing device 26", the master terminal data transmitting device 27" of the master device 2 and the master of the master device 2 in FIG. The content of the end creating device 25, the primary end distributing device 26, and the primary data transmitting device 27 are the same or substantially the same, and are not described here for brevity and are hereby incorporated by reference.

FIG. 8 illustrates a flow chart of a method for transmitting data in a virtual environment on a client device side, according to an embodiment of another aspect of the present application.

The method includes step S81, step S82, and step S83. Specifically, in step S81, the client device 1 creates a first data transmission module; in step S82, the client device 1 allocates a shared memory according to the first data transmission module, and the shared memory allows the primary device Performing a read/write operation; in step S83, the client device 1 performs data transmission with the shared memory through the first data transmission module.

Here, the client device 1 includes an automatic numerical meter capable of automatically following an instruction set or stored in advance. Electronic devices for computing and information processing, including but not limited to microprocessors, application specific integrated circuits (ASICs), programmable gate arrays (FPGAs), digital processors (DSPs), embedded devices, and the like. The client device 1 can also be a collection of computer data and instructions organized in a series of sequences. In addition, the client device may also be a combination of a collection of computer data and instructions organized in a specific order and electronic devices capable of automatically performing numerical calculations and information processing in accordance with pre-set or stored instructions. A person skilled in the art should understand that the client device 1 is only an example, and other existing or future client devices 1 may be included in the application, and should be included in the scope of the present application. It is included here by reference.

The various steps of the client device 1 are continuously working. Specifically, in step S81, the client device 1 creates a first data transmission module, and the first data transmission module created by the client device 1 in the step S81 is continuously used by the step S82 and the step S83. In step S82, the client device 1 continues to allocate a shared memory according to the first data transmission module, and the shared memory allows the primary device to perform read and write operations. In step S83, the client device 1 continues to pass the first A data transmission module performs data transmission with the shared memory until the guest device 1 stops working.

In step S81, the client device 1 creates a first data transmission module.

The first data transmission module includes a guest virtual device and a client driver. The creation of the first data transmission module by the client device 1 includes: creating a guest virtual device and loading a guest driver of the guest virtual device.

Further, the client device 1 adds the client virtual device by modifying the corresponding logic according to the type of the host hypervisor, and the guest virtual device is used between the kernel space and the user space and the kernel space of the guest and the host. Communication between. Specifically, in the creation phase of the guest, the client device 1 can directly add the guest virtual device by using the created method. If the guest already exists, the client device 1 can use the hot plug method to add the guest virtual device.

In step S82, the client device 1 allocates a shared memory according to the first data transmission module, and the shared memory allows the primary device to perform read and write operations.

In step S83, the client device 1 performs data transmission with the shared memory through the first data transmission module. The step S83 includes at least one of step S831 (not shown) and step S832 (not shown), wherein in step S831, the client device 1 stores the first data to be transmitted in In the shared memory, in step S832, the client device 1 acquires the second data to be transmitted stored by the master device in the shared memory.

Here, in step S831, the client device 1 is configured to send the first data to be transmitted to the master device, and the client device 1 is configured to receive the second data to be transmitted sent by the master device in step S832. The step S83 may include only the step S831, that is, sending the first data to be transmitted to the primary device; the step S83 may also include only the step S832, that is, receiving the first message sent by the primary device. The step S83 may further include the step S831 and the step S832, that is, sending the first data to be transmitted to the primary device and receiving the second data to be transmitted sent by the primary device. At the same time.

Specifically, in step S831, the client device 1 reads the first to-be-transmitted data into the user space, and copies the first to-be-transmitted data from the user space to the shared memory located in the kernel space.

Here, the client device 1 reads the first data to be transmitted from the storage medium of the client device 1 to the user space of the client device in the memory, and the shared memory is located in the kernel space of the memory, so the first device The data to be transmitted is copied from the user space to the shared memory.

Specifically, in step S831, the client device 1 copies the first to-be-transmitted data read to the user space into the shared memory located in the kernel space, based on the related capacity information of the shared memory. After each copy, the first data transmission message is sent to the primary device; after the first data read message returned by the primary device is obtained, the next copy is performed until the transmission is completed.

Here, the related capacity information of the shared memory may include, but is not limited to, the transmission page for data transmission. The size of the face, the size of the transfer page SIZET = the number of sub-pages TP × sub-page size PAGESIZE. Preferably, when the first to-be-transmitted data is copied from the user space to the shared memory, the copying is performed in units of the transmission page.

Assume that the size of the first data to be transmitted is N, the size of the data transmitted by the client device 1 is ALREADY, the initial value is 0, the number of free subpages of the transmission page SEND1 is FREE, and the initial value of the subpage number A is 0. The process of copying the first to-be-transmitted data from the client device 1 to the shared memory is as follows:

The sixth step is to execute ALREADY+=the size of the data copied to the shared memory, FREE-=the number of subpages used this time, that is, the data size ALREADY sent by the client device 1 is equal to the copy to the location. The new value after the data size of the shared memory, the number of free subpages of the transmission page SEND1 is equal to the new value after subtracting the number of subpages used this time; then the client device 1 sends the number to the primary device a data transmission message, to notify the primary device to read the data copied to the shared memory, and the client device 1 obtains the first data read message returned by the primary device, and then executes FREE=TP. Then turn to the first step.

Those skilled in the art should understand that the above-mentioned first to-be-transmitted data is copied from the user space to the shared memory. The method is only an example, and other existing or future possible methods for copying the first data to be transmitted from the user space to the shared memory, as applicable to the present application, are also included in the scope of protection of the present application. It is included here by reference.

Specifically, in step S832, the client device 1 reads the second data to be transmitted stored by the master device in the shared memory, and copies the read second data to be transmitted to the user space, The second to-be-transmitted data copied to the user space is stored to the storage medium.

Here, the client device 1 copies the second data to be transmitted sent by the master device from the shared memory to the user space, and then copies the space from the user space to the storage medium. The storage medium refers to a non-volatile storage medium such as, but not limited to, a hard disk, an optical disk, a USB flash drive, an SD card, or the like.

Specifically, in step S832, the client device 1 reads the second data to be transmitted stored by the master device in the shared memory according to the second data transmission message sent by the master device, and the reading is completed. Thereafter, a second data read message is returned to the primary device.

For example, if the size of the second data to be transmitted is N, the data size received by the client device 1 is GET, and the initial value is 0, and the second data to be transmitted is copied from the shared memory to the client device 1 The process is as follows:

The first step is to determine whether the equality GET==N is true, that is, whether the data size GET received by the client device 1 is equal to the size N of the second data to be transmitted, and if so, the client device 1 has completed the Reading the second data to be transmitted, and returning a second data read message to the primary device; if not, proceeding to the second step;

In the second step, waiting for the second data transmission message sent by the primary device, after receiving the second data transmission message sent by the primary device, according to the length LEN_SLICE of the transmission page RECEIVE1 in the control page, and transmitting The page RECEIVE1 subpage number and the information such as the address ADDR of the transmission page RECEIVE1 in the shared memory are sequentially processed and the data in the transmission page RECEIVE1 is copied to the user space, and the client device 1 copies the copy to the second to be transmitted in the user space. The data is stored to the storage medium, and then GET+=the size of the data acquired from the shared memory, that is, the data size GET received by the client device 1 is equal to the size of the data acquired from the shared memory. The new value, the client device 1 returns a second data read message to the master device, and then proceeds to the first step.

According to a preferred embodiment of the present application, the method may further include: the client device 1 is passing the first Before the data transmission module performs data transmission with the shared memory, performing transmission event communication with the primary end device, wherein the performing transmission event communication includes at least one of the following:

The client device 1 sends first data information about the first data to be transmitted to the primary device;

The client device 1 acquires second data information about the second to-be-transmitted data sent by the primary device.

Here, the first to-be-transmitted data is transmitted to the storage device in the form of a file, and the first data information includes a storage path of the file, a name of the file, and a length of the file. After the second to-be-transmitted data is transmitted to the client device, it is stored in a storage medium in a file format, and the second data information includes a storage path of the file, a name of the file, and a length of the file. By the client device 1 performing transmission event communication with the master device before the data transmission starts, some low-level errors similar to repeated transmission can be avoided, and the data transmission success rate is effectively improved.

FIG. 9 illustrates a flow chart of a method for transmitting data in a virtual environment on a primary end device side, in accordance with an embodiment of another aspect of the present application.

The method includes step S95, step S96, and step S97. Specifically, in step S95, the primary device 2 creates a second data transmission module; in step S96, the primary device 2 acquires access rights of the shared memory allocated by the client device, so that the shared memory allows the primary terminal. The device performs a read/write operation; in step S97, the primary device 2 performs data transmission with the shared memory through the second data transmission module.

Here, the master device 2 includes an electronic device capable of automatically performing numerical calculation and information processing according to an instruction set or stored in advance, and the hardware thereof includes but is not limited to a microprocessor, an application specific integrated circuit (ASIC), Programmable gate array (FPGA), digital processor (DSP), embedded devices, etc. The primary device 2 can also be a collection of computer data and instructions organized in a sequence of specific sequences. Furthermore, the master device 2 may also be a combination of a collection of computer data and instructions organized in a specific sequence and electronic devices capable of automatically performing numerical calculations and information processing in accordance with pre-set or stored instructions. Those skilled in the art should understand that the primary device 2 is merely an example, and other existing or future possible primary devices 2 may be applied to the present application as well. It is intended to be included within the scope of this application and is hereby incorporated by reference.

The various steps of the master device 2 are continuously working. Specifically, in step S95, the primary device 2 creates a second data transmission module, and the second data transmission module created by the primary device 2 in the step S95 continues to be used in the step S96 and the step S97. In step S96, the master device 2 continuously obtains the access rights of the shared memory allocated by the client device, so that the shared memory allows the master device to perform read and write operations. In step S97, the master device 2 continues to pass the The second data transmission module performs data transmission with the shared memory until the primary device 2 stops working.

In step S95, the primary device 2 creates a second data transmission module.

The second data transmission module includes a primary virtual device and a primary drive. The creation of the second data transmission module by the primary device 2 includes: creating a primary virtual device and loading a primary driver of the primary virtual device.

Further, the master device 2 increases the master virtual device by modifying the corresponding logic according to the type of the host hypervisor, and the master virtual device is used for the kernel space between the kernel space and the user space and between the host and the guest. Communication between.

In step S96, the master device 2 acquires the access rights of the shared memory allocated by the client device, so that the shared memory allows the master device to perform read and write operations.

Here, the shared memory located in the kernel space is used as a transfer station to transmit data, and the existing serial port transmission method In comparison, the data transmission rate is greatly improved, and the operation is simpler and less occupied by system resources than the existing hot-swappable disk.

In step S97, the primary device 2 performs data transmission with the shared memory through the second data transmission module. The step S97 includes at least one of step S975 (not shown) and step S976 (not shown), wherein in step S975, the master device 2 acquires that the client device is stored in The first to-be-transmitted data of the shared memory, in step S976, the primary-end device 2 stores the second to-be-transmitted data in the shared memory.

Here, in step S975, the primary device 2 is configured to receive the first data to be transmitted sent by the client device, and the primary device 2 is configured to send the second data to be transmitted to the client device in step S976. The step S97 may include only the step S975, that is, receiving the first to-be-transmitted number sent by the client device; the step S97 may also include only the step S976, that is, sending the first to the client device. The step S97 may further include the step S975 and the step S976, that is, receiving the first data to be transmitted sent by the client device and sending the second data to be transmitted to the client device. At the same time.

Specifically, in step S976, the primary device 2 reads the second to-be-transmitted data into the user space, and copies the second to-be-transmitted data from the user space to the shared memory located in the kernel space.

Here, the master device 2 reads the second data to be transmitted from the storage medium of the master device 2 to the user space of the master device in the memory, and the shared memory is located in the kernel space of the memory, so the second device The data to be transmitted is copied from the user space to the shared memory.

Specifically, in step S976, the master device 2 copies the second to-be-transmitted data read to the user space into the shared memory located in the kernel space, based on the related capacity information of the shared memory. After each copy, the second data transmission message is sent to the client device; after the second data read message returned by the client device is obtained, the next copy is performed until the transmission is completed.

Assuming that the size of the second data to be transmitted is N, the size of the data transmitted by the master device 2 is ALREADY, the initial value is 0, the number of free subpages of the transmission page SEND2 is FREE, and the initial value of the subpage number A is 0. The process of copying the second to-be-transmitted data from the primary device 2 to the shared memory is as follows:

In the first step, according to the size of the untransmitted portion of the second data to be transmitted, LEFT=N–ALREADY, Whether the LEFT is 0 or not, if yes, the transmission of the second data to be transmitted on the primary device end has ended; if not, determining whether data can be copied to the shared memory through subsequent steps;

The sixth step is to execute ALREADY+=the size of the data copied to the shared memory, FREE-=the number of subpages used this time, that is, the data size ALREADY sent by the master device 2 is equal to the copy to the location. The new value after the data size of the shared memory, the number of free subpages of the transmission page SEND2 is equal to the new value after subtracting the number of subpages used this time; then the master device 2 sends the number to the client device a data transmission message, to notify the client device to read the data copied to the shared memory, and the master device 2 obtains the second data read message returned by the client device, and then executes FREE=TP. Then turn to the first step.

Specifically, in step S975, the master device 2 reads the first data to be transmitted stored in the shared memory by the client device, and copies the read first data to be transmitted to the user space, and the The first to-be-transmitted data copied to the user space is stored to the storage medium.

Here, the master device 2 copies the first to-be-transmitted data sent by the client device from the shared memory to User space, then copy from user space to storage media. The storage medium refers to a non-volatile storage medium such as, but not limited to, a hard disk, an optical disk, a USB flash drive, an SD card, or the like.

Specifically, in step S975, the primary device 2 reads the first data to be transmitted stored in the shared memory by the client device according to the first data transmission message sent by the client device, and the reading is completed. Thereafter, the first data read message is returned to the guest device.

For example, if the size of the first data to be transmitted is N, the size of the data that the primary device 2 has received is GET, and the initial value is 0, and the first data to be transmitted is copied from the shared memory to the primary device 2 The process is as follows:

The first step is to determine whether the equality GET==N is true, that is, whether the data size GET received by the primary device 2 is equal to the size N of the first data to be transmitted, and if so, the primary device 2 has completed the Reading the first data to be transmitted, and returning the first data read message to the client device, and if not, proceeding to the second step;

In the second step, waiting for the first data transmission message sent by the client device, after receiving the first data transmission message sent by the client device, according to the length of the transmission page RECEIVE2 in the control page, LEN_SLICE, transmission The page RECEIVE2 subpage number and the information such as the address ADDR of the transmission page RECEIVE2 in the shared memory are sequentially processed and the data in the transmission page RECEIVE2 is copied to the user space, and the primary device 2 copies the first to be transmitted to the user space. The data is stored to the storage medium, and then GET+=the size of the data acquired from the shared memory, that is, the data size GET received by the primary device 2 is equal to the size of the data acquired from the shared memory. The new value, the master device 2 returns a first data read message to the client device, and then proceeds to the first step.

According to a preferred embodiment of the present application, the method may further include: the primary device 2 performs transmission event communication with the client device before performing data transmission with the shared memory by the second data transmission module, The transmitting event communication includes at least one of the following:

The primary device 2 sends second data information about the second data to be transmitted to the client device;

The master device 2 acquires first data information about the first to-be-transmitted data sent by the client device.

Here, after the second to-be-transmitted data is transmitted to the client device, it is stored in a storage medium in a file format, and the second data information includes a storage path of the file, a name of the file, and a length of the file. After the first to-be-transmitted data is transmitted to the primary device end, the data is stored in a storage medium, and the first data information includes The storage path of the file, the name of the file, and the length of the file. By the primary communication device performing transmission event communication with the client device before the data transmission starts, some low-level errors similar to repeated transmission can be avoided, and the data transmission success rate is effectively improved.

For example, assume that in the Xen virtualization environment, the primary end device 2 communicates with the guest device for event communication: the transfer command can be placed in a xenstore (a storage device in the Xen virtual environment, and the xenstore is completed based on the event channel). The transmission command includes the second data information and notifies the client device that there is a new command. The client device obtains a transmission command from the xenstore, extracts the second data information, and first checks whether the storage path of the file in the second data information already exists, and if yes, returns an error, and notifies the primary device 2 of the corresponding error. The information then ends the transmission; if not, the file is created according to the storage path of the file in the second data information, and the host device 2 is notified that the transmission command has been accepted and the processing is normal.

FIG. 10 illustrates a flow chart of a method for transmitting data in a virtual environment, in accordance with an embodiment of another aspect of the present application. The method includes steps S81' to S83' and steps S95' to S97'. Specifically, in step S81', the client device 1 creates a first data transmission module; in step S95', the master device 2 creates a second data transmission module; in step S82', the client device 1 according to the The first data transmission module allocates a shared memory, and the shared memory allows the primary device 2 to perform a read/write operation; in step S96', the primary device 2 obtains the access permission of the shared memory allocated by the client device 1 to The shared memory is allowed to perform the read and write operations of the primary device 2; in step S83', the client device 1 performs data transmission with the shared memory through the first data transmission module, and the step S83' includes the following at least Any one of: storing the first data to be transmitted in the shared memory, and acquiring second data to be transmitted stored by the primary device 2 in the shared memory; in step S97, the primary device 2 passes through The second data transmission module performs data transmission with the shared memory, and the step S97' includes at least one of the following: acquiring the first data to be transmitted stored by the client device 1 in the shared memory, Two data to be transmitted is stored in the shared memory. Here, steps S81' to S83' are the same as or substantially the same as the contents of steps S81 to S83 in FIG. 8, and steps S95' to S97' are the same as or substantially the same as the contents of steps S95 to S97 in FIG. 9, for the sake of brevity. Therefore, it will not be repeated here, and is included herein by reference.

Compared with the prior art, in one embodiment of the present application, the client device creates a first data transmission module, and the primary device creates a second data transmission module, the first data transmission module and the second data transmission module. Providing a data transmission channel between the user space of the client device and the user space of the host device; the client device allocates a shared memory located in the kernel space according to the first data transmission module, and allows the primary terminal The device reads and writes the shared memory, and the primary device acquires access rights of the shared memory; the client device and the primary device respectively pass the first data transmission module and the second Data transmission module and the shared memory Performing data transmission, specifically, the client device stores the first to-be-transmitted data in the shared memory, and the primary device acquires the first to-be-transmitted storage of the client device in the shared memory. Data, the primary device stores the second data to be transmitted in the shared memory, and the client device acquires second data to be transmitted stored by the primary device in the shared memory.

Moreover, in a typical configuration of the present application, the terminal, the device of the service network, and the trusted party each include one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include non-persistent memory, random access memory (RAM), and/or non-volatile memory in a computer readable medium, such as read only memory (ROM) or flash memory. Memory is an example of a computer readable medium.

Computer readable media includes both permanent and non-persistent, removable and non-removable media. Information storage can be implemented by any method or technology. The information can be computer readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory. (ROM), electrically erasable programmable read only memory (EEPROM), flash memory or other memory technology, compact disk read only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, A magnetic tape cartridge, magnetic tape storage or other magnetic storage device or any other non-transportable medium that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include non-transitory computer readable media, such as modulated data signals and carrier waves.

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

It should be noted that the present application can be implemented in software and/or a combination of software and hardware, for example, using an application specific integrated circuit (ASIC), a general purpose computer, or any other similar hardware device. In one embodiment, the software program of the present application can be executed by a processor to implement the steps or functions described above. Likewise, the software programs (including related data structures) of the present application can be stored in a computer readable recording medium such as a RAM memory, a magnetic or optical drive or a floppy disk and the like. In addition, some of the steps or functions of the present application may be implemented in hardware, for example, as a circuit that cooperates with a processor to perform various steps or functions.

In addition, a portion of the present application can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide a method and/or technical solution in accordance with the present application. The program instructions for invoking the method of the present application may be stored in a fixed or removable recording medium, and/or transmitted by a data stream in a broadcast or other signal bearing medium, and/or stored in a The working memory of the computer device in which the program instructions are run. Herein, an embodiment in accordance with the present application includes a device including a memory for storing computer program instructions and a processor for executing program instructions, wherein when the computer program instructions are executed by the processor, triggering The apparatus operates based on the aforementioned methods and/or technical solutions in accordance with various embodiments of the present application.

It is obvious to those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the invention is defined by the appended claims instead All changes in the meaning and scope of equivalent elements are included in this application. Any reference signs in the claims should not be construed as limiting the claim. In addition, it is to be understood that the word "comprising" does not exclude other elements or steps. A plurality of units or devices recited in the device claims may also be implemented by a unit or device by software or hardware. The first, second, etc. words are used to denote names and do not denote any particular order.

Claims

A method for transmitting data in a virtual environment on a client device side, wherein the method includes:

Creating a first data transmission module;

Allocating a shared memory according to the first data transmission module, and the shared memory allows the primary device to perform a read and write operation;

Data transmission by the first data transmission module and the shared memory, wherein the performing data transmission includes at least one of the following:

The first to-be-transmitted data is stored in the shared memory,

Obtaining second to-be-transmitted data stored by the primary device in the shared memory.
The method of claim 1, wherein storing the first data to be transmitted in the shared memory comprises:

Reading the first to-be-transmitted data into a user space;

Copying the first to-be-transmitted data from the user space to the shared memory located in a kernel space.
The method of claim 2, wherein copying the first data to be transmitted from the user space to the shared memory located in a kernel space comprises:

Decoding, according to the related capacity information of the shared memory, the first to-be-transmitted data read to the user space to the shared memory located in a kernel space;

The first data transmission message is sent to the primary device after each copy;

After acquiring the first data read message returned by the primary device, the next copy is performed until the transfer is completed.
The method according to any one of claims 1 to 3, wherein acquiring the second data to be transmitted stored by the primary device in the shared memory comprises:

Reading the second to-be-transmitted data stored by the primary device in the shared memory;

Copying the read second to-be-transmitted data to the user space;

The second to-be-transmitted data copied to the user space is stored to the storage medium.
The method of claim 4, wherein reading the second data to be transmitted stored by the primary device in the shared memory comprises:

Reading, according to the second data transmission message sent by the primary device, the second to-be-transmitted data stored by the primary device in the shared memory;

After the reading is completed, a second data read message is returned to the primary device.
The method of any of claims 1 to 5, wherein the method further comprises:

Before performing data transmission with the shared memory by the first data transmission module, performing transmission event communication with the primary device, and performing transmission event communication includes at least one of the following:

Transmitting, to the primary device, first data information about the first to-be-transmitted data;

Obtaining second data information about the second to-be-transmitted data sent by the primary device.
A method for transmitting data in a virtual environment on a host device side, wherein the method includes:

Creating a second data transmission module;

Obtaining access rights of the shared memory allocated by the client device, so that the shared memory allows the host device to perform read and write operations;

Data transmission is performed by the second data transmission module and the shared memory, wherein the performing data transmission includes at least one of the following:

Obtaining, by the client device, the first data to be transmitted stored in the shared memory, where

The second to-be-transmitted data is stored in the shared memory.
The method of claim 7, wherein storing the second data to be transmitted in the shared memory comprises:

Reading the second data to be transmitted to the user space;

Copying the second to-be-transmitted data from the user space to the shared memory located in a kernel space.
The method of claim 8, wherein copying the second data to be transmitted from the user space to the shared memory located in a kernel space comprises:

And downloading, according to the related capacity information of the shared memory, the second to-be-transmitted data read to the user space to the shared memory located in a kernel space;

The second data transmission message is sent to the client device after each copy;

After acquiring the second data read message returned by the client device, the next copy is performed until the transfer is completed.
The method according to any one of claims 7 to 9, wherein acquiring the first data to be transmitted stored by the client device in the shared memory comprises:

Reading the first data to be transmitted stored by the client device in the shared memory;

Copying the read first to-be-transmitted data to the user space;

The first to-be-transmitted data copied to the user space is stored to the storage medium.
The method of claim 10, wherein reading the guest device is stored in the shared memory The first data to be transmitted includes:

Reading, according to the first data transmission message sent by the client device, the first to-be-transmitted data stored by the client device in the shared memory;

After the reading is completed, a first data read message is returned to the guest device.
The method of any of claims 7 to 11, wherein the method further comprises:

Before the data transmission by the second data transmission module and the shared memory, performing transmission event communication with the client device, and performing transmission event communication includes at least one of the following:

Transmitting, to the client device, second data information about the second data to be transmitted;

Obtaining first data information about the first to-be-transmitted data sent by the client device.
A client device for transmitting data in a virtual environment, wherein the device includes:

a client creation device, configured to create a first data transmission module;

a client allocation device, configured to allocate a shared memory according to the first data transmission module, and the shared memory allows the primary device to perform a read and write operation;

a client data transmission device, configured to perform data transmission with the shared memory by using the first data transmission module, wherein the client data transmission device includes at least one of the following:

a client data storage unit, configured to store the first to-be-transmitted data in the shared memory,

The client data obtaining unit is configured to acquire second data to be transmitted stored by the master device in the shared memory.
The device of claim 13, wherein the client data storage unit comprises:

a subunit for reading the first data to be transmitted to a user space;

And for copying the first to-be-transmitted data from the user space to a sub-unit of the shared memory located in a kernel space.
The device according to claim 14, wherein the subunit for copying the first data to be transmitted from the user space to the shared memory located in a kernel space comprises:

And configured to, according to the related capacity information of the shared memory, copy the first to-be-transmitted data read to the user space into sub-units of the shared memory located in a kernel space;

For transmitting, after each copy, a subunit of the first data transmission message to the primary device;

Sub-unit for performing the next copy until the transfer is completed after acquiring the first data read message returned by the primary device.
The device according to any one of claims 13 to 15, wherein the client data acquisition unit package include:

a subunit for reading the second data to be transmitted stored by the primary device in the shared memory;

a subunit for copying the read second data to be transmitted to the user space;

The second to-be-transmitted data for copying the copy to the user space is stored to a sub-unit of the storage medium.
The device according to claim 16, wherein the subunit for reading the second data to be transmitted stored by the primary device in the shared memory comprises:

And reading, by the second data transmission message sent by the primary device, a subunit of the second data to be transmitted stored by the primary device in the shared memory;

A subunit for returning a second data read message to the primary device after the reading is completed.
The device according to any one of claims 13 to 17, wherein the device further comprises:

a client communication device, configured to perform transmission event communication with the primary device before performing data transmission with the shared memory by the first data transmission module, wherein the client communication device includes at least one of item:

a client information sending unit, configured to send, to the primary device, first data information about the first data to be transmitted;

The client information acquiring unit is configured to acquire second data information about the second data to be transmitted sent by the primary device.
A host device for transmitting data in a virtual environment, where the device includes:

a primary end creating device, configured to create a second data transmission module;

The primary end allocation device is configured to obtain access rights of the shared memory allocated by the client device, so that the shared memory allows the primary device to perform read and write operations;

The primary data transmission device is configured to perform data transmission with the shared memory by using the second data transmission module, where the primary data transmission device includes at least one of the following:

a primary data acquiring unit, configured to acquire first data to be transmitted that is stored in the shared memory by the client device, where

And a primary data storage unit, configured to store the second to-be-transmitted data in the shared memory.
The device of claim 19, wherein the primary data storage unit comprises:

a subunit for reading the second data to be transmitted to a user space;

And a subunit for copying the second to-be-transmitted data from the user space to the shared memory located in a kernel space.
The apparatus according to claim 20, wherein said means for transmitting said second data to be transmitted from said use The subspace of the shared space to the shared memory located in the kernel space includes:

And the second to-be-transmitted data read to the user space is separately copied to the sub-unit of the shared memory located in the kernel space according to the related capacity information of the shared memory;

For transmitting, after each copy, a subunit of the second data transmission message to the client device;

Sub-unit for performing the next copy until the transfer is completed after acquiring the second data read message returned by the guest device.
The device according to any one of claims 19 to 21, wherein the primary data acquisition unit comprises:

a subunit for reading the first data to be transmitted stored by the client device in the shared memory;

a subunit for copying the read first data to be transmitted to the user space;

The first to-be-transmitted data for copying the copy to the user space is stored to a sub-unit of the storage medium.
The device according to claim 22, wherein the subunit for reading the first data to be transmitted stored by the client device in the shared memory comprises:

And a subunit for reading, by the client device, the first data to be transmitted stored in the shared memory according to the first data transmission message sent by the client device;

A subunit for returning a first data read message to the guest device after the reading is completed.
The device according to any one of claims 19 to 23, wherein the device further comprises:

a primary communication device configured to perform transmission event communication with the client device before performing data transmission with the shared memory by the second data transmission module, wherein the primary communication device includes at least one of item:

a primary end information sending unit, configured to send, to the client device, second data information about the second to-be-transmitted data;

The primary end information acquiring unit is configured to acquire first data information about the first to-be-transmitted data sent by the client device.