CN100432975C - Architecture of interface target machine for miniature computer system and data transmitting method - Google Patents
Architecture of interface target machine for miniature computer system and data transmitting method Download PDFInfo
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- CN100432975C CN100432975C CNB2006101504453A CN200610150445A CN100432975C CN 100432975 C CN100432975 C CN 100432975C CN B2006101504453 A CNB2006101504453 A CN B2006101504453A CN 200610150445 A CN200610150445 A CN 200610150445A CN 100432975 C CN100432975 C CN 100432975C
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Abstract
The invention supply small computer system interface target machine framework and data transmitting method. The framework includes front end drive layer used to receive SCSI request from host computer starter and transmit to middle managing layer and receive processed response back from the middle managing layer and transmit to host computer starter, middle managing layer used to receive SCSI request from the front end drive layer, generate SCSI command, manage the SCSI command, and transmit to back end processing layer receive processed response back from back end processing layer and transmit to front end drive layer, back end processing layer used to store configuration data, process SCSI command, return processed response to the middle managing layer. The invention can be used to keep SCSI target machine configuration data synchronizing with back end processing layer data, unify different SCSI target machine back end processing flow.
Description
Technical field
The present invention relates to communication field, relate in particular to a kind of interface target machine for miniature computer system and data transmission method.
Background technology
The major function of SCSI (small computer system interface) agreement is to transmit order, state and blocks of data between main frame and memory device, and since the eighties in 20th century, the SCSI agreement is the main agreement that data block is transmitted between server always.
SCSI was a kind of storage unit interface that designs for minicomputer system specially originally, was widely used in high reliability, high performance memory interface now, as SCSI hard disk, SAN (storage area network) array etc.SCSI protocol model synoptic diagram as shown in Figure 1.The SCSI protocol model is similar to client-server model, comprising: SCSI starter and scsi target device, and each SCSI starter and scsi target device all comprise link layer and Physical layer, the SCSI starter links to each other by physical data with the scsi target device.The SCSI starter is initiated the SCSI request, and the scsi target device receives the SCSI request.
The design architecture of scsi target device of the prior art all is to be used for the single controller pattern, and the configuration diagram of the scsi target device under typical single prosecutor formula as shown in Figure 2.The framework of each scsi target device comprises: front-end driven layer, middle layer and back-end processing layer.Wherein the front-end driven layer both can be that SCSI bottom (transport layer, link layer) drives, and also can be the driving of FC (optical-fibre channel) or IP (Internet agreement); Configuration data is responsible for preserving in the middle layer, realizes the tissue and the scheduling of scsi command; The back-end processing layer is responsible for the processing of concrete scsi command.
The shortcoming of the design architecture of above-mentioned scsi target device of the prior art is: this framework is kept at configuration data in the middle layer of scsi target device, but in the high two control patterns of reliability requirement, this design can't be satisfied scsi target device need of work, because the configuration data of two scsi target device requirements must keep synchronous under two control patterns, and synchronous operation is finished by configuration module, therefore, this framework will cause between two scsi target devices in the same system configuration data inconsistent.
Summary of the invention
The purpose of this invention is to provide a kind of interface target machine for miniature computer system and data transmission method, thus can realize scsi target device configuration data between two controls synchronously.
The objective of the invention is to be achieved through the following technical solutions:
A kind of interface target machine for miniature computer system comprises:
The front-end driven layer: the small computer system interface SCSI Intra-request Concurrency that receives the transmission of host-initiated device is given middle management level; The processing response that the reception middle management level returns also sends to the host-initiated device;
Middle management level: the SCSI request that the receiving front-end Drive Layer sends, generate scsi command according to this SCSI request, this scsi command is managed, scsi command is sent to the back-end processing layer; The processing response that reception back-end processing layer returns also sends to the front-end driven layer;
Back-end processing layer: preserve configuration data, handle the scsi command that middle management level sends, return processing response to middle management level according to this configuration data.
Described front-end driven layer comprises: the front end port of one or more types, and described back-end processing layer comprises: the rear end port of one or more types; Described every type front end port all with the rear end port correspondence of respective type.
Described middle management level specifically comprises:
The scsi command generation module: the SCSI request that is used for sending over according to the front-end driven layer that receives generates the middle layer scsi command, and the scsi command that generates is passed to the scsi command administration module;
The scsi command administration module: the scsi command that is used for the scsi command generation module is passed over is classified by different main frames and session; And call the front end port and the rear end port of corresponding types according to the type of this SCSI request corresponding equipment logical block unit;
Scsi command and data transfer module: the rear end port that is used for calling by the scsi command administration module is given the back-end processing layer with scsi command and data transfer, the scsi command that reception back-end processing layer returns and the processing response of data; The processing response that the front end port that calls by the scsi command administration module returns the back-end processing layer passes to the front-end driven layer.
Described back-end processing layer specifically comprises:
Configuration data is preserved module: the configuration data that is used to preserve the scsi target device;
Synchronous processing module: be used for when opposite end scsi target device is provided with its configuration data, the configuration data of local terminal scsi target device being set synchronously according to the scsi command that receives;
Scsi command and data processing module: be used for handling scsi command and the data that middle management level sends over, return processing response to middle management level according to the configuration data that configuration data preservation module is preserved.
Described interface target machine for miniature computer system is arranged at the controller of single control pattern or two control patterns.
A kind of data transmission method of interface target machine for miniature computer system comprises step:
A, front-end driven layer send to middle management level with the SCSI request, and described middle management level generates scsi command according to the SCSI request that receives, and scsi command is managed, and scsi command is sent to the back-end processing layer;
B, described back-end processing layer are handled the described scsi command that receives according to the configuration data of preserving, and return processing response to described middle management level, and the described processing response that described middle management level will receive sends to described front-end driven layer.
Described steps A specifically comprises:
A1, front-end driven layer send to middle management level with the SCSI request that the host-initiated device that receives sends, middle management level generates scsi command according to described SCSI request, at definite this scsi command legal and can carry out this scsi command after, execution in step A2;
A2, middle management level are classified to described scsi command; And call the front end port and the rear end port of corresponding types according to the type of this SCSI request corresponding equipment logical block unit; Described scsi command is passed to the back-end processing layer.
Described steps A 2 specifically comprises:
Middle management level is classified by different main frames and session to described scsi command, and each scsi command is all hung over below the corresponding session, by the rear end port that calls respective type scsi command is passed to the back-end processing layer.
Described step B specifically comprises:
After B1, back-end processing layer received described scsi command, the configuration data according to preserving called corresponding back-end processing function described scsi command is handled, and result is returned to middle management level; When opposite end scsi target device is provided with its configuration data, the configuration data of local terminal scsi target device is set synchronously;
The front end registration interface function of B2, the middle management level front end port by calling respective type, the result that described back-end processing layer is passed over passes to the front-end driven layer, and the front-end driven layer passes to the host-initiated device with this result.
Described step B also comprises:
B3, host-initiated device forward end driver send scsi data, and FED(front end driver) passes to middle management level with this scsi data, and middle management level passes to the back-end processing layer with this scsi data again;
B4, back-end processing layer return processing response to middle management level after described scsi data is handled, and middle management level passes to the host-initiated device by FED(front end driver) with this processing response; Host-initiated device notice FED(front end driver), middle management level and back-end processing layer discharge corresponding resource.
As seen from the above technical solution provided by the invention, the present invention is kept at the back-end processing layer with configuration data, middle management level only carries out the management of SCSI request, order, a kind of framework and data transmission and processing flow process of the scsi target device based on dual controller have been proposed, thereby can the data sync by the back-end processing layer keep scsi target device configuration data between two controls synchronously, and the treatment scheme of unified different scsi target devices rear end.
The present invention also allows to exist simultaneously the rear end port and the front end port of number of different types, front end port and rear end port are bound, handle thereby can give different rear end ports with scsi command, be convenient to management and carry out various scsi command according to the type of scsi target device front end port.Avoided in the system of the front end port of a plurality of types coexistence, the situation of system architecture confusion can't be carried out or cause to the SCSI request on request.
Description of drawings
Fig. 1 is a SCSI protocol model synoptic diagram;
Fig. 2 is the SCSI configuration diagram under typical single prosecutor formula in the prior art;
Fig. 3 is the synoptic diagram of the framework of scsi target device of the present invention;
Fig. 4 is the modular structure synoptic diagram of scsi target device of the present invention;
Fig. 5 is the concrete processing flow chart that the data transmission method of the framework of scsi target device of the present invention is implemented.
Embodiment
The invention provides a kind of framework and data transmission method of interface target machine for miniature computer system, core of the present invention is: middle management level only carries out the management of SCSI request, scsi command, configuration data is kept at the back-end processing layer, the back-end processing layer is also sent in the execution of SCSI request, and configuration data is synchronous between controlling by the realization of back-end processing layer is two.
Describe the present invention in detail below in conjunction with accompanying drawing, the synoptic diagram of the framework of scsi target device of the present invention as shown in Figure 3, the modular structure synoptic diagram of scsi target device of the present invention comprises as shown in Figure 4 as lower module:
The front-end driven layer: comprise the front end port of one or more types, and the front end port is driven, the front-end driven layer need be registered the front end port to middle management level.The front-end driven layer can be that SCSI drives, and also can be the driving of FC and ISCSI (SCSI over IP).Receive SCSI request and data that the host-initiated device sends to the scsi target device, and this SCSI request and data are sent to middle management level.The processing response of the scsi command that the reception middle management level returns sends to the host-initiated device with this processing response.Every kind of front end port type all with the rear end port binding of corresponding types.
Middle management level: the SCSI request that sends over according to the front-end driven layer generates the middle layer scsi command, and this scsi command is managed.Scsi command is classified by different Host (main frame) and Session (session).And call the front end registration interface function and the rear end registration interface function of corresponding types according to the type of this SCSI request corresponding equipment LUN (logical block unit).Handle to the back-end processing layer scsi command and data transfer by calling rear end registration interface function.The scsi command that reception back-end processing layer returns and the processing response of data pass to the front-end driven layer by the front end registration interface function that calls with this processing response.Middle management level comprises: scsi command generation module, scsi command administration module and scsi command and data transfer module.
Wherein, scsi command generation module: the SCSI request that is used for sending over according to the front-end driven layer that receives generates the middle layer scsi command, and the scsi command that generates is passed to the scsi command administration module.
Wherein, scsi command administration module: the scsi command that is used for the scsi command generation module is passed over is classified by different Host and Session; And call the front end port and the rear end port of corresponding types according to the type of this SCSI request corresponding equipment LUN.
Wherein, scsi command and data transfer module: the rear end port that is used for calling by the scsi command administration module handles to the back-end processing layer scsi command and data transfer, the scsi command that reception back-end processing layer returns and the processing response of data; The processing response that the front end port that calls by the scsi command administration module returns the back-end processing layer passes to the front-end driven layer.
Back-end processing layer: comprise the rear end port of one or more types, the rear end port is registered to middle management level.Preserve configuration data, when opposite end scsi target device is provided with its configuration data, the configuration data of local terminal scsi target device is set synchronously.Handle scsi command and the data that middle management level sends over according to the configuration data of preserving, return processing response to middle management level.Each rear end port type is all bound with corresponding front end port type.The back-end processing layer comprises: configuration data is preserved module, synchronous processing module and scsi command and data processing module.
Wherein, configuration data is preserved module: be used to preserve the configuration data of scsi target device, in actual applications, configuration data can be kept among the DB (configuration database).
Wherein, synchronous processing module: be used for when the configuration data of this controller is set, when opposite end scsi target device is provided with its configuration data, the configuration data of local terminal scsi target device being set synchronously according to the scsi command that receives.
Wherein, scsi command and data processing module: be used for handling scsi command and the data that middle management level sends over, return processing response to middle management level according to the configuration data of preserving.
The framework of above-mentioned scsi target device both had been applicable to that two control patterns also were applicable to single control pattern.Because configuration data has been saved in the back-end processing layer, can keep by the data sync of back-end processing layer scsi target device configuration data between two controls synchronously.
The concrete treatment scheme of the embodiment of the data transmission method of the framework of scsi target device of the present invention comprises the steps: as shown in Figure 5
The front-end driven layer of step 100:SCSI object machine is received the SCSI request that the host-initiated device sends, this SCSI request is passed to middle management level, middle management level generates corresponding scsi command according to this SCSI request, and the scsi command that generates is finished initialization.
Step 110: middle management level is judged the legitimacy of scsi command, such as: whether access parameter meets the SCSI protocol parameter that this scsi target device is supported, as NACA bit position, and judge whether can carry out scsi command now according to the state of scsi target device middle management level, such as whether unitattention is arranged, whether the main frame LUN of visit has access rights, if can carry out, then continues execution in step 120; Otherwise, the Interrupt Process flow process.
Step 120: middle management level is classified above-mentioned scsi command by different Host (main frame) and Session (session), each scsi command all can correspond under the Session of a specific Host, and each scsi command all hangs over below the corresponding Session.And call the rear end port of corresponding types according to the type of this request corresponding equipment LUN, above-mentioned scsi command is passed to the back-end processing layer handle.
After the back-end processing layer receives above-mentioned scsi command, call corresponding back-end processing function, according to the configuration data of preserving, the status attribute of query facility LUN, equipment LUN is exactly physics LUN, this notion is corresponding with the notion of logic LUN, and whether normal such as equipment LUN state, whether equipment LUN enters Flow Control etc.And judge whether rear end equipment LUN supports the processing of this scsi command, determines the type of scsi command, write the order of type or the order of reading type.
Step 130: the back-end processing layer returns to middle management level with the judged result of above-mentioned scsi command.
Step 140: middle management level is according to the judged result that the back-end processing layer returns, and determines that above-mentioned scsi command writes type command or read type command, if write type command, then processing layer sends the request of application internal memory, execution in step 150 to the back-end; Otherwise, execution in step 160.
Step 150: the back-end processing layer according to middle management level send over the application internal memory request, apply for internal memory after, return response to middle management level.Waits for too long when avoiding internal memory to exhaust, above-mentioned response adopt asynchronous system to return.Execution in step 160.
Step 160: the front end registration interface function forward end Drive Layer of the front end port of middle management level by calling respective type sends a notification message, and notice front-end driven layer carries out data transmission.
Step 170: the front-end driven layer passes to the host-initiated device with the above-mentioned notification message that middle management level sends, and receives the SCSI that the host-initiated device sends over and reads and writes data, and this SCSI read and write data pass to middle management level.
Step 180: the SCSI that middle management level passes over above-mentioned front-end driven layer reads and writes data and gives the back-end processing layer by the rear end registration interface function passes of calling, and the back-end processing layer calls corresponding back-end processing function, handles this SCSI and reads and writes data.
Step 190: the back-end processing layer is handled above-mentioned scsi command, if this scsi command is the order of query argument class, then directly obtains this configuration data from the DB of this control phase; If this scsi command is that the order of parameter class is set, be provided with among its DB in the configuration data at opposite end scsi target device, configuration data among the DB of local terminal scsi target device is set synchronously.Configuration data is synchronous between the two controls of realization.After above-mentioned scsi command is complete, result is returned to middle management level.This result can adopt asynchronous system to return.
Step 200: middle management level is given the front-end driven layer with the front end registration interface function passes of the front end port of the above-mentioned result that receives by calling respective type, and the front-end driven layer passes to the host-initiated device again with this result.
Step 210: the forward end Drive Layer was returned response after the host-initiated device received above-mentioned result, after the front-end driven layer is received this response, discharged corresponding front end resource.Reinform middle management level and discharge corresponding resource.
Step 220: middle management level notice back-end processing layer discharges corresponding backend resources, and above-mentioned SCSI Request Processing finishes.
The principal feature that the present invention compares with prior art is: all configuration informations all are to be placed on middle layer (on main frame LUN and the equipment LUN) in the prior art, can't accomplish that configuration data is synchronous between two controls.All configuration informations all are to be put into the back-end processing layer among the present invention, are convenient to realize that configuration data is synchronous between two controls.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1, a kind of interface target machine for miniature computer system is characterized in that, comprising:
The front-end driven layer: the small computer system interface SCSI Intra-request Concurrency that receives the transmission of host-initiated device is given middle management level; The processing response that the reception middle management level returns also sends to the host-initiated device;
Middle management level: the SCSI request that the receiving front-end Drive Layer sends, generate scsi command according to this SCSI request, this scsi command is managed, scsi command is sent to the back-end processing layer; The processing response that reception back-end processing layer returns also sends to the front-end driven layer;
Back-end processing layer: preserve configuration data, handle the scsi command that middle management level sends, return processing response to middle management level according to this configuration data.
2, interface target machine for miniature computer system according to claim 1 is characterized in that, described front-end driven layer comprises: the front end port of one or more types, and described back-end processing layer comprises: the rear end port of one or more types; Described every type front end port all with the rear end port correspondence of respective type.
3, interface target machine for miniature computer system according to claim 1 is characterized in that, described middle management level specifically comprises:
The scsi command generation module: the SCSI request that is used for sending over according to the front-end driven layer that receives generates the middle layer scsi command, and the scsi command that generates is passed to the scsi command administration module;
The scsi command administration module: the scsi command that is used for the scsi command generation module is passed over is classified by different main frames and session; And call the front end port and the rear end port of corresponding types according to the type of this SCSI request corresponding equipment logical block unit;
Scsi command and data transfer module: the rear end port that is used for calling by the scsi command administration module is given the back-end processing layer with scsi command and data transfer, the scsi command that reception back-end processing layer returns and the processing response of data; The processing response that the front end port that calls by the scsi command administration module returns the back-end processing layer passes to the front-end driven layer.
4, interface target machine for miniature computer system according to claim 1 is characterized in that, described back-end processing layer specifically comprises:
Configuration data is preserved module: the configuration data that is used to preserve the scsi target device;
Synchronous processing module: be used for when opposite end scsi target device is provided with its configuration data, the configuration data of local terminal scsi target device being set synchronously according to the scsi command that receives;
Scsi command and data processing module: be used for handling scsi command and the data that middle management level sends over, return processing response to middle management level according to the configuration data that configuration data preservation module is preserved.
According to claim 1,2,3 or 4 described interface target machine for miniature computer system, it is characterized in that 5, described interface target machine for miniature computer system is arranged at the controller of single control pattern or two control patterns.
6, a kind of data transmission method of interface target machine for miniature computer system is characterized in that, comprises step:
A, front-end driven layer send to middle management level with the SCSI request, and described middle management level generates scsi command according to the SCSI request that receives, and scsi command is managed, and scsi command is sent to the back-end processing layer;
B, described back-end processing layer are handled the described scsi command that receives according to the configuration data of preserving, and return processing response to described middle management level, and the described processing response that described middle management level will receive sends to described front-end driven layer.
7, method according to claim 6 is characterized in that, described steps A specifically comprises:
A1, front-end driven layer send to middle management level with the SCSI request that the host-initiated device that receives sends, middle management level generates scsi command according to described SCSI request, at definite this scsi command legal and can carry out this scsi command after, execution in step A2;
A2, middle management level are classified to described scsi command; And call the front end port and the rear end port of corresponding types according to the type of this SCSI request corresponding equipment logical block unit; Described scsi command is passed to the back-end processing layer.
8, method according to claim 7 is characterized in that, described steps A 2 specifically comprises:
Middle management level is classified by different main frames and session to described scsi command, and each scsi command is all hung over below the corresponding session, by the rear end port that calls respective type scsi command is passed to the back-end processing layer.
9, according to claim 6,7 or 8 described methods, it is characterized in that described step B specifically comprises:
After B1, back-end processing layer received described scsi command, the configuration data according to preserving called corresponding back-end processing function described scsi command is handled, and result is returned to middle management level; When opposite end scsi target device is provided with its configuration data, the configuration data of local terminal scsi target device is set synchronously;
The front end registration interface function of B2, the middle management level front end port by calling respective type, the result that described back-end processing layer is passed over passes to the front-end driven layer, and the front-end driven layer passes to the host-initiated device with this result.
10, method according to claim 9 is characterized in that, described step B also comprises:
B3, host-initiated device forward end driver send scsi data, and FED(front end driver) passes to middle management level with this scsi data, and middle management level passes to the back-end processing layer with this scsi data again;
B4, back-end processing layer return processing response to middle management level after described scsi data is handled, and middle management level passes to the host-initiated device by FED(front end driver) with this processing response; Host-initiated device notice FED(front end driver), middle management level and back-end processing layer discharge corresponding resource.
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| CN101566923B (en) * | 2008-04-25 | 2012-09-26 | 中兴通讯股份有限公司 | Unified driving module of target end SCSI equipment and method thereof |
| CN101504627B (en) * | 2009-02-25 | 2012-04-25 | 成都市华为赛门铁克科技有限公司 | Data transmission method and apparatus |
| CN101841566B (en) * | 2010-04-01 | 2013-12-18 | 中兴通讯股份有限公司南京分公司 | Driving system and method for network storage target end |
| CN102222033B (en) * | 2011-06-20 | 2017-07-11 | 中兴通讯股份有限公司 | A kind of method and device for preserving small computer system interface access error |
| CN103220162B (en) * | 2012-01-19 | 2016-08-31 | 百度在线网络技术（北京）有限公司 | The fault-tolerant optimization method and device of SCSI based on HDFS |
| CN105183568B (en) * | 2015-08-19 | 2018-08-07 | 山东超越数控电子有限公司 | A kind of scsi command synchronization methods between storage dual controller |
| CN105204779B (en) * | 2015-09-14 | 2018-10-02 | 北京鲸鲨软件科技有限公司 | SCSI TARGET access control methods based on dual control and device |
| FR3072480B1 (en) | 2017-10-12 | 2019-10-04 | Continental Automotive France | METHOD OF TRANSMITTING INTO A PASSIVE SYSTEM OF ACTIVATION OF AT LEAST ONE FUNCTIONALITY PRESENT IN A MOTOR VEHICLE |
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