CN109976877A - The method, apparatus and storage medium for realizing request are driven using virtio - Google Patents
The method, apparatus and storage medium for realizing request are driven using virtio Download PDFInfo
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- CN109976877A CN109976877A CN201910221640.8A CN201910221640A CN109976877A CN 109976877 A CN109976877 A CN 109976877A CN 201910221640 A CN201910221640 A CN 201910221640A CN 109976877 A CN109976877 A CN 109976877A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
- G06F8/65—Updates
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
- G06F2009/45579—I/O management, e.g. providing access to device drivers or storage
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Abstract
The present invention provides a kind of method for driving using virtio and realizing request, device and storage medium.This method comprises: receiving step, receives one or more requests；Information generates and storing step, when each request is processed, generates the processing information of corresponding descriptor, obtains the respective one or more processing information of one or more descriptors, and stored；Information acquiring step obtains one or more processing information of storage after the processing to one or more request is interrupted；Searching step handles information according to one or more, and untreated descriptor is retrieved from one or more descriptors, and according to the respective processing information of untreated descriptor, taking-up can be drawn with the current strop of ring；Indicate step, instruction handles request corresponding with untreated descriptor in one or more request, and indicates that the next strop drawn from current strop draws request corresponding to the descriptor started to process in available ring.
Description
Technical field
It the present invention relates to the use of method, apparatus and storage medium that request is realized in virtio driving.
Background technique
Virtio driving is commonly driven in current virtualized environment, and the driving is for requesting hair for the I/O in empty machine
Give the storage system of rear end.Virtio driving is divided into two parts, in the guest operating system (guest os) in empty machine
It is front-end driven part, on host is rear end drive part, after being usually sent to I/O request by front-end driven part
End drive part is handled.
In actual production environment, rear end drive part often corresponds to the incoming end of complicated storage system, possesses complexity
Service logic, be also frequently necessary to carry out edition upgrading or can there is a situation where unexpected collapses (crash).This is occurring at present
When kind situation, restored by way of restarting virtual machine.However, can cause to seriously affect to customer service in this way.
Summary of the invention
The present invention provides a kind of method for driving using virtio and realizing request, this method comprises:
Receiving step receives one or more requests, each that corresponding descriptor is requested to be recorded to the virtio drive
In dynamic available ring；
Information generates and storing step, when each request is processed, generates the processing of the corresponding descriptor
Information obtains the respective one or more processing information of one or more descriptors, and is stored；
Information acquiring step, to the processing of one or more of requests interrupt after, obtain the one of storage or
Multiple processing information；
Searching step retrieves not from one or more of descriptors according to one or more of processing information
Descriptor is handled, and according to the untreated respective processing information of descriptor, can be drawn with the current strop of ring described in taking-up；
Indicate step, instruction to request corresponding with the untreated descriptor in one or more of requests at
Reason, and indicate to draw from next strop that the current strop draws to start to process and described can be asked corresponding to the descriptor in ring
It asks.
Wherein, each processing information in one or more of processing information includes the processing status of descriptor, description
Symbol is in the carry that can be drawn with strop corresponding in ring and the corresponding strop draws.
Wherein, when request has handled completion or not yet started to process, the processing status is the first symbol, works as request
When present, the processing status is the second symbol.
Wherein, in the searching step, the processing status is retrieved from one or more of descriptors as institute
The descriptor of the second symbol is stated as the untreated descriptor, and according in the untreated respective processing information of descriptor
The strop draw with the carry, take out the current strop and draw.
The present invention also provides a kind of device for being driven using virtio and realizing and requesting, which includes:
Receiving unit receives one or more requests, each that corresponding descriptor is requested to be recorded to the virtio drive
In dynamic available ring；
Information generates and storage unit, when each request is processed, generates the processing of the corresponding descriptor
Information obtains the respective one or more processing information of one or more descriptors, and is stored；
Information acquisition unit, to the processing of one or more of requests interrupt after, obtain the one of storage or
Multiple processing information；
Retrieval unit retrieves not from one or more of descriptors according to one or more of processing information
Descriptor is handled, and according to the untreated respective processing information of descriptor, can be drawn with the current strop of ring described in taking-up；
Indicating unit, instruction to request corresponding with the untreated descriptor in one or more of requests at
Reason, and indicate to draw from next strop that the current strop draws to start to process and described can be asked corresponding to the descriptor in ring
It asks.
Wherein, each processing information in one or more of processing information includes the processing status of descriptor, description
Symbol is in the carry that can be drawn with strop corresponding in ring and the corresponding strop draws.
Wherein, when request has handled completion or not yet started to process, the processing status is the first symbol, works as request
When present, the processing status is the second symbol.
Wherein, it is described second that the retrieval unit retrieves the processing status from one or more of descriptors
The descriptor of symbol is as the untreated descriptor, and according in the untreated respective processing information of descriptor
Strop draws to be drawn with the carry, the taking-up current strop.
Wherein, described device further comprises processing unit, for handling one or more of requests.
The present invention also provides a kind of storage mediums, are stored with to drive using virtio on said storage and realize request
Program, described program is computer-executed to implement the method for realizing request using virtio driving, which includes:
Reception instructs, and receives one or more requests, each that corresponding descriptor is requested to be recorded to the virtio drive
In dynamic available ring；
Information generates and store instruction, when each request is processed, generates the processing of the corresponding descriptor
Information obtains the respective one or more processing information of one or more descriptors, and is stored；
Acquisition of information instruction, to the processing of one or more of requests interrupt after, obtain the one of storage or
Multiple processing information；
Search instruction retrieves not from one or more of descriptors according to one or more of processing information
Descriptor is handled, and according to the untreated respective processing information of descriptor, can be drawn with the current strop of ring described in taking-up；
Indicator, instruction to request corresponding with the untreated descriptor in one or more of requests at
Reason, and indicate to draw from next strop that the current strop draws to start to process and described can be asked corresponding to the descriptor in ring
It asks.
Through the invention, even if in the case where rear end drive part carries out edition upgrading or unexpected collapse occurs,
All requests for not yet handling completion can be continued with after restart, will not missed request or reprocessing request, realize fast
Speed is automatically restored, and avoids causing to seriously affect to customer service, while the unaware heat upgrading of virtio driving may be implemented.
Detailed description of the invention
Fig. 1 is the structure chart according to an embodiment of the present invention for being driven using virtio and realizing the device of request；
Fig. 2 is the flow chart according to an embodiment of the present invention for being driven using virtio and realizing the method for request.
Specific embodiment
With reference to the accompanying drawing, the embodiment of the present invention is described in detail.
Fig. 1 is the structure chart according to an embodiment of the present invention for being driven using virtio and realizing the device 1 of request.The device 1
Including receiving unit 10, information generates and storage unit 11, information acquisition unit 12, retrieval unit 13, indicating unit 14.The dress
Setting 1 is, for example, the rear end drive part in virtio driving.
Fig. 2 is the flow chart according to an embodiment of the present invention for being driven using virtio and realizing the method for request, such as Fig. 2 institute
Show, in receiving step S20, receiving unit 10 receives one or more requests, each that corresponding descriptor is requested to be recorded to
In the available ring of virtio driving.
In virtio driving, front-end driven part is sent one or more request (that is, I/O is requested) by vring
It is handled to rear end drive part.Vring includes descriptor array (desc), can use ring (available ring) He Yiyong
Ring (used ring).Descriptor array is stored with multiple descriptors, and each descriptor corresponds to a buffer (buffer).
Each request corresponds to a descriptor, and corresponding descriptor is recorded in available ring.
In information generation and storing step S21, when each request is processed, information generates and the generation pair of storage unit 11
The processing information for the descriptor answered obtains the respective one or more processing information of one or more descriptors, and is stored.
As shown in Figure 1, the device 10 further includes processing unit 15, processing unit 15 requests the one or more received
It is respectively processed.When processing unit 15 starts to process a request, information is generated and storage unit 11 will generate and is somebody's turn to do
Request the processing information of corresponding descriptor.
Wherein, the processing information of each descriptor includes that the processing status of the descriptor, the descriptor are right in available ring
The carry that the strop answered draws and corresponding strop draws.
It can be, for example, 16 with ring, there are 16 strops to draw, such as 0-15.The each descriptor being recorded in available ring
Draw corresponding to a strop.Here, the strop due to 16, which draws, is easy to unroll, and handling in information includes what strop drew
Carry, to distinguish the actual size that each strop draws.
The processing information of each descriptor is, for example, 32 unsigned ints, such as is indicated respectively by 0-31.Wherein,
0 indicates the processing status of the descriptor, and 1-15 indicate the descriptor carry that corresponding strop draws in available ring, 16-
31 indicate that the descriptor corresponding strop in available ring draws.Wherein, unsigned int is write-once, 32 nothings of alignment
The write-once of symbol integer can guarantee to handle the atomicity of information, therefore can operate bring discrimination to avoid Non-atomic
Justice.
When request, which has been processed the processing of unit 15, to be completed or not yet start to process, processing status is the first symbol, example
Such as " 0 ", when request is just in unit 15 processed processing, processing status is the second symbol, such as " 1 ".
That is, 0 of the processing information of each descriptor is " 0 ", indicate that request corresponding with the descriptor has been located
Reason is completed or is not yet started to process, and 0 of the processing information of each descriptor is " 1 ", indicates request corresponding with the descriptor
Present, that is, have begun processing but not yet processing is completed.In addition, the request is corresponding after the completion of requesting processed
0 of the processing information of descriptor is arranged to " 0 ", is then added to the corresponding descriptor of the request and has used in ring.
The one or more requests of 15 pairs of processing unit in the process of processing, when rear end drive part occur collapsing or
It needing normally to withdraw when being upgraded, processing of these requests can be interrupted, rear end drive part is restarted, so as to
Continue with request.
In information acquiring step S22, after the processing of 15 pairs of processing unit one or more requests is interrupted, acquisition of information list
Member 12 obtains one or more processing information of storage.
Then, in searching step S23, retrieval unit 13 is according to said one or multiple processing information, from one or more
Untreated descriptor is retrieved in descriptor, and according to these untreated respective processing information of descriptor, ring can be used by taking out
Current strop draws.
Wherein, retrieval unit 23 retrieves processing status from the one or more descriptors stored in descriptor array and is
The descriptor of second symbol " 1 ", as untreated descriptor.That is, taking out 0 of processing information from these descriptors
It is the descriptor of " 1 ", as untreated descriptor, such as descriptor d1 and d5.
Then, retrieval unit 23 draws and carry according to the strop in the respective processing information of these untreated descriptors, takes
Current strop draws out.Wherein, when carry difference, taking-up, which is worth strop corresponding to maximum carry, draws and draws as current strop,
When carry is identical, the maximum strop of taking-up value draws to be drawn as current strop.Do not locate for example, retrieval unit 23 has retrieved 2
Descriptor d1 and d5 are managed, the carry in the processing information of descriptor d1 is " 2 ", and it is " 4 ", the processing information of descriptor d5 that strop, which draws,
In carry be " 1 ", it is " 5 " that strop, which draws,.Wherein, the carry of descriptor d1 is greater than the carry of descriptor d5, therefore by descriptor
The strop of d1 draws " 4 " and draws as current strop.That is, can clearly distinguish each strop by the setting of carry and draw
Actual size.
In instruction step S24, the instruction of indicating unit 14 is asked to corresponding with untreated descriptor in one or more request
It asks and is handled, and indicate that the next strop drawn from current strop draws and asked corresponding to the descriptor started to process in available ring
It asks.
In this example, processing unit 15 according to the instruction of indicating unit 14, such as in one or more request with descriptor
Corresponding 2 requests of d1, d5 are handled, in this way, can continue with to request those of is being handled when interrupting, to keep away
Exempt to omit the request of untreated completion.In addition, processing unit 15 draws " 5 " beginning from next strop that current strop draws " 4 "
Reason can the request corresponding to the descriptor in ring, in this way, next request of the request handled when interrupting can be started after
Continuous processing, to avoid reprocessing processed request.
Wherein, during processing unit 15 continues with request according to the instruction of indicating unit 14, information generate and
Storage unit 11 equally can be that descriptor corresponding to the request of processing generates processing information, and is stored.
Through the invention, when handling the one or more requests received, though rear end drive part into
Row edition upgrading occurs to have interrupted processing in the case where unexpected collapse, can also continue with and not yet handle after restart
At all requests, will not missed request or reprocessing request, realization restore fast automaticly, avoid causing customer service
It seriously affects, while the unaware heat upgrading of virtio driving may be implemented.
The present invention also provides a kind of storage mediums, are stored with to drive using virtio on said storage and realize request
Program, described program is computer-executed to implement the method for realizing request using virtio driving, which includes:
Reception instructs, and receives one or more requests, each that corresponding descriptor is requested to be recorded to the virtio drive
In dynamic available ring；
Information generates and store instruction, when each request is processed, generates the processing of the corresponding descriptor
Information obtains the respective one or more processing information of one or more descriptors, and is stored；
Acquisition of information instruction, to the processing of one or more of requests interrupt after, obtain the one of storage or
Multiple processing information；
Search instruction retrieves not from one or more of descriptors according to one or more of processing information
Descriptor is handled, and according to the untreated respective processing information of descriptor, can be drawn with the current strop of ring described in taking-up；
Indicator, instruction to request corresponding with the untreated descriptor in one or more of requests at
Reason, and indicate to draw from next strop that the current strop draws to start to process and described can be asked corresponding to the descriptor in ring
It asks.
Although by being described in conjunction with specific embodiments to the present invention, for the ordinary artisan of this field,
It will be apparent according to many substitutions, modification and the variation made after mentioned above.Therefore, when such substitution, modification
When being fallen into variation within the spirit and scope of appended claims, it should be included in the present invention.
Claims (10)
1. a kind of drive the method for realizing request using virtio, which is characterized in that the described method includes:
Receiving step receives one or more requests, each that corresponding descriptor is requested to be recorded to the virtio driving
It can be in ring；
Information generates and storing step, when each request is processed, generates the processing information of the corresponding descriptor,
The respective one or more processing information of one or more descriptors are obtained, and are stored；
Information acquiring step obtains the one or more of of storage after interrupting to the processing of one or more of requests
Handle information；
Searching step retrieves untreated according to one or more of processing information from one or more of descriptors
Descriptor, and according to the untreated respective processing information of descriptor, it can be drawn with the current strop of ring described in taking-up；
Indicating step, instruction handles request corresponding with the untreated descriptor in one or more of requests,
And it indicates to draw from next strop that the current strop draws and starts to process request corresponding to the descriptor that can be used in ring.
2. the method as described in claim 1, which is characterized in that each processing information in one or more of processing information
Processing status, descriptor including descriptor can be drawn and the corresponding strop draws described with strop corresponding in ring
Carry.
3. method according to claim 2, which is characterized in that when request has handled completion or has not yet started to process, institute
Stating processing status is the first symbol, and when requesting present, the processing status is the second symbol.
4. method as claimed in claim 3, which is characterized in that in the searching step, from one or more of descriptions
Retrieved in symbol the processing status be second symbol descriptor as the untreated descriptor, and according to it is described not
The strop in the respective processing information of processing descriptor draws to be drawn with the carry, the taking-up current strop.
5. a kind of drive the device for realizing request using virtio, which is characterized in that described device includes:
Receiving unit receives one or more requests, each that corresponding descriptor is requested to be recorded to the virtio driving
It can be in ring；
Information generates and storage unit, when each request is processed, generates the processing information of the corresponding descriptor,
The respective one or more processing information of one or more descriptors are obtained, and are stored；
Information acquisition unit obtains the one or more of of storage after interrupting to the processing of one or more of requests
Handle information；
Retrieval unit retrieves untreated according to one or more of processing information from one or more of descriptors
Descriptor, and according to the untreated respective processing information of descriptor, it can be drawn with the current strop of ring described in taking-up；
Indicating unit, instruction handle request corresponding with the untreated descriptor in one or more of requests,
And it indicates to draw from next strop that the current strop draws and starts to process request corresponding to the descriptor that can be used in ring.
6. device as claimed in claim 5, which is characterized in that each processing information in one or more of processing information
Processing status, descriptor including descriptor can be drawn and the corresponding strop draws described with strop corresponding in ring
Carry.
7. device as claimed in claim 6, which is characterized in that when request has handled completion or has not yet started to process, institute
Stating processing status is the first symbol, and when requesting present, the processing status is the second symbol.
8. device as claimed in claim 7, which is characterized in that the retrieval unit is examined from one or more of descriptors
Rope goes out the descriptor that the processing status is second symbol and untreated retouches as the untreated descriptor, and according to described
State the strop accorded in respective processing information draw with the carry, take out the current strop and draw.
9. the device as described in any one of claim 5-8, which is characterized in that described device further comprises processing unit,
For handling one or more of requests.
10. a kind of storage medium is stored with the program for driving using virtio and realizing request, the journey on said storage
Sequence is computer-executed to implement the method for realizing request using virtio driving, which is characterized in that described program includes:
Reception instruction receives one or more requests, each that corresponding descriptor is requested to be recorded to the virtio driving
It can be in ring；
Information generates and store instruction, when each request is processed, generates the processing information of the corresponding descriptor,
The respective one or more processing information of one or more descriptors are obtained, and are stored；
Acquisition of information instruction obtains the one or more of of storage after interrupting to the processing of one or more of requests
Handle information；
Search instruction retrieves untreated according to one or more of processing information from one or more of descriptors
Descriptor, and according to the untreated respective processing information of descriptor, it can be drawn with the current strop of ring described in taking-up；
Indicator, instruction handle request corresponding with the untreated descriptor in one or more of requests,
And it indicates to draw from next strop that the current strop draws and starts to process request corresponding to the descriptor that can be used in ring.
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