CN101013380A - Hot-swap processing method based on HPI model - Google Patents
Hot-swap processing method based on HPI model Download PDFInfo
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Abstract
The invention provides a hot swap method based on HPI model, including hot insert and removed. The method includes logical domain separation mechanism and the mechanism for handling hot-swappable. The domain separation mechanism abstracts the hot-swappable components as entities and manages them in logic groups in terms of resources. The resources are divided into domain to be managed. When hot remove happens, the domain separation mechanism controls the access to domain objects and resource objects to ensure that the remove of components will not affect the availability of system service. The mechanism for handling hot-swappable interact with the domain separation mechanism to initialize the logic domain, make the system components in different logic domains, and be responsible for control the state of components when they are inserted or removed to ensure that the insertion and remove of components will not affect the availability of system service. The invention effectively overcomes the impact of system stability induced the hot swap process.
Description
Technical field
The present invention relates to computer craze plug technical field, a kind of design and the realization technology in the high available ATCA telecommunication server of field of telecommunications particularly at the hot plug processing policy, specifically, the present invention has designed a kind of new hot-swap processing method based on the HPI model.
Background technology
Along with the fast development of computer technology, the network user has higher requirement to the telecommunication system availability---have the ability that continuous service is provided; The year downtime of this Capability Requirement system must not be above 30 seconds.In order to satisfy the high availability that this demand improves service, in shutdown system not, taking out under the situation of not cutting off the electricity supply and changing the system components such as fan, power supply, hard disk and internal memory that damage becomes a kind of technology that field of telecommunications is paid close attention to; So-called hot plug technology that Here it is.Hot plug technology comprises that hot drawing goes out and heat is inserted.
All there has been hot plug preferably to handle in Windows and the (SuSE) Linux OS to USB, Ieee1394, PCI equipment and network equipment.
The design of hot plug is divided into three layers among the Linux: at first be Drive Layer, in order to dispose a hot-plug equipment, it must at first be created and be registered in the kernel; This task is finished by relevant device drives usually.The driving of these equipment has all been carried out corresponding change in order to support hot plug.Next is the hot-swap handling procedure in middle layer, and this is the emphasis of hot plug technology.The superiors, the hot plug subsystem of Linux is undertaken by shell and system user alternately.
The processing of hot-swap handling procedure is divided into following a few step among the Linux:
The variation of equipment and hot pluggable condition on the detection system bus;
The insertion of treatment facility or extract incident;
The driving of notifying operation system loads or unloading relevant device.
(is example with Windows2000) hot-swap system can be divided into two-layer in the Windows system: Drive Layer and hot-swap processing layer.In Windows2000 in order to support hot plug integrated hot plug tool set (Hot Swap Kit is called for short HSK by Pigeon Point Systems and Auriga exploitation) in kernel.HSK has finished the function that is similar to hot-swap processing and command interaction layer among the Linux.
The treatment mechanism of HSK can summarize into following some:
Confirm the number and the hot pluggable condition of equipment on the system bus;
Increased hot plug state of a control register (HS_CSR) at hardware in order to support hot plug;
Catch and handle electric signal or operation requests is extracted in processing;
The variation of equipment on the notifying operation service system bus;
Operating system loads or unloads the driving of relevant device according to respective change;
Having reserved API is convenient to other program and carries out hot pluggable condition inquiry.
Hot plug treatment mechanism among Windows and the Linux is basic identical, yet all is only to have solved extracting and the insertion problem of equipment.Operate being nowhere near that the influence of system is considered for extracting operation or insertion, yet these influences are vital to the system that high available service is provided.
The HPI model is to mention in the HPI standard that in September, 2002, Service Availability Forum was issued, and it mainly is to come server hardware is carried out unified management by unified abstract mechanism, thereby to upper layer application and middleware shielding hardware differences; Improve the reliability of telecommunication system and the high availability of service.
Summary of the invention
The objective of the invention is to overcome the influence to system when extracting operation or inserting operation of existing hot plug technology, provide a kind of hot plug processing policy also with it efficient realization, system can be in operation change the assembly that damages and then make the user can obtain continual system service.
In order to realize the foregoing invention purpose, the technical scheme of employing is as follows:
A kind of hot-swap processing method based on the HPI model comprises that heat is inserted and heat shifts out, and the treating method comprises domain logic separate mechanism and hot plug treatment mechanism; Described domain logic separate mechanism is carried out in logic grouping management in the mode of resource for entity with the hot plug assembly is abstract, resource divides into groups to manage in the mode in territory again, when hot drawing goes out, described domain logic separate mechanism is controlled the visit of field object and resource object, has guaranteed that shifting out of assembly do not influence the availability of system service; Hot plug treatment mechanism and domain logic separate mechanism are mutual, realization is to the initialization of domain logic, system component is in the different domain logics, and is responsible for heat is inserted and heat shifts out in the process state of assembly and controls, guaranteed the insertion of assembly and shifted out the availability that does not influence system service.
Described domain logic separate mechanism is divided into a plurality of domain logics to system component, and is that each one-level logic region---the territory reference table has been set up in the territory when setting up domain logic, is the two-level logic zone---and resource has been set up resource and has been attended table; Territory reference table record and self associated territory, and control is to the visit of field object; Resource attends to show all resources in the recording domain then, and control is to the visit of resource object.
Described domain logic separate mechanism with the redundant component of system as simple logic territory independently.
Redundant component can be the redundancy of plate level, also can be the redundancy of hot plug assembly.
Hot-swap processing method based on the HPI model of the present invention, when component heat shifts out, described hot plug treatment mechanism shifts out resource with the resource of this assembly entity correspondence and attends table, refreshes resource then and attends table, makes all and the mutual termination of this entity move; Then, the simple logic territory descriptor that contains the redundancy that shifts out assembly is joined in the territory reference table of this assembly, make other assembly still can have access to the entity that shifts out the assembly correspondence.
Described hot plug treatment mechanism is inserted heat and heat shifts out in the process State Control of assembly and comprises state is divided into not existence, inserts suspended state, state of activation, extracts suspended state, unactivated state; Described not existence can be switched to the insertion suspended state, insert suspended state and can be switched to state of activation, state of activation can be switched to extracts suspended state, extract suspended state and can be switched to unactivated state, described insertion suspended state, state of activation, extract suspended state, unactivated state and all can be switched to not existence.
The hot insertion process of described hot plug treatment mechanism comprises load driver and client layer hot plug control; Described load driver is behind assembly of new insertion, the interrupt service routine of device driver scans whole C ompactPCI bus after receiving signal, been scanned calls call_usermodehelper by kernel function request_module and user's space carries out alternately, kernel function request_module is arg[1] be initialized to will load-on module name, then utilization/sbin/modprobe and configuration file/etc/modprobe.conf determine will load-on module details; Described client layer hot plug control joins the pairing FRU entity of plug-in package in the territory by Addresource command calls function R esourceAdd, after the operation of ResourceAdd function adding novel entities is finished, can call automatically that the Rptflush function refreshes when setting up domain logic to be safeguarded resource attend table, last fill order hotplug-〉 active, this order can be called the new entity of ResourceActive function activation and make it to be in active state in the territory, and service normally is provided.
The heat of described hot plug treatment mechanism shifts out process and shifts out the residing domain logic of the pairing logical model of assembly in the location earlier; And carry out Inactive instruction passivation reorganization part, stop the session of other assembly and its generation; Then resource is shifted out residing domain logic, promptly the resource of safeguarding from the territory attends to reject the table this assembly; Refresh resource again and attend table, make all with this assembly institute correspondent entity all stop alternately move; Domain logic information with the redundant component place of this assembly adds in the territory reference table of safeguarding in this territory, assembly place at last, makes mode access that other application can be by the hierarchy domain visit to this assembly.
The present invention has successfully divided a plurality of domain logics to the ATCA server system by the logical abstraction of HPI model to ATCA hardware.And need be when setting up domain logic with the redundant component of ATCA server separately as simple field independently.Redundant assembly can be the redundancy of plate level, also can be the redundancy of hot plug assembly.Mainly comprise two parts, the one, the domain logic separate mechanism; The 2nd, hot plug is handled.Hot-plug method of the present invention has important meaning for the high availability that improves telecommunication server, and the present invention operates to aim with halt system not, the system component that damages is shifted out system repairs, and after the assembly reparation is finished with its dynamic adding system.The assurance system service is not interrupted in the whole process, and the availability of system is strengthened.
The present invention can not stop to be in the system of running status, the goal systems assembly carried out heat is inserted and heat shifts out, reduce the downtime of system, the reliability of raising system, make it efficiently, stably to run on telecommunications service platform, satisfy high available running environment demand.
Description of drawings
Fig. 1 is hot plug general frame figure;
Fig. 2 is the logic isolation structural drawing;
Fig. 3 is the hot pluggable condition transition graph;
Fig. 4 is that heat is inserted processing flow chart;
Fig. 5 shifts out processing flow chart for heat.
Embodiment
The processing of hot plug needs the hot plug handling procedure cooperation of operating system and client layer to finish among the present invention.Operating system loads corresponding driving when mainly being responsible for inserting new equipment in system; The hot-swap handling procedure of client layer can notify the kernel unloading corresponding driving when unloading damages assembly.The hot plug handling procedure at first will carry out the initialization of domain logic, and system component is in the different domain logics; To be responsible for then heat is inserted and heat shifts out in the process state of assembly and controls, the availability of system applies is safeguarded; The final availability that realizes hot plug raising telecommunication system.
The hot plug technology that the present invention is designed, its functional characteristics can be subdivided into following several aspect:
(1) domain logic is separated:
The assembly that hot plug technology requires to carry out hot plug operations and other assembly of system can not have too many alternately.Otherwise hot plug operations may influence the availability of system service.Based on this present invention the ATCA server system has been carried out isolation in logic.The heat that is divided into domain logic shifts out and lays a good foundation.
(2) dynamic load:
Hot plug technology can add new assembly system and make it normal operation under the situation of halt system not.
(3) dynamic offloading
Hot plug technology also can be under the situation of halt system not, with damage and hardware on support the system component of hot plug to shift out system.The availability of maintenance service in shifting out process.
(4) migration of Ying Yonging
The migration of using is an important ring in the hot plug processing procedure.Shifting out of each assembly all can be to system service generation influence more or less, and this just need take certain strategy that issuable influence is handled.
Below in conjunction with accompanying drawing, concrete enforcement of the present invention is described in further detail.
Accompanying drawing 1 has been showed the architecture and the chief component of hot plug mechanism.Be divided into three levels: Drive Layer, hot plug processing layer, the command interaction terminal of supporting hot plug.Wherein, Drive Layer helps the management of application program realization to the hot plug assembly, and the hot plug processing layer is responsible for the control of hot pluggable condition migration and the switching of assembly, and the command interaction terminal then provides the interactive maintenance of system user and hot-swap handling procedure.
To carry out hot plug treatment mechanism of the present invention is described in detail at each key components below.
Hot plug treatment mechanism of the present invention is based on the management of HPI model to hardware, carries out in logic grouping management in the mode of resource for entity with the hot plug assembly is abstract.Resource also can divide into groups to manage in the mode in territory again.The hot plug processing that is divided into is in logic had laid a good foundation.Hot plug mechanism among the present invention has been followed the complete hot plug model that defines in the HPI standard, and the employing of hot plug model is significant to the availability of the service of raising system fully.
Accompanying drawing 2 has provided the synoptic diagram that the ATCA server is carried out logic isolation.These subregion and ATCA hardware in logic have corresponding relation (in HPI-to-AdvancedTCA Mapping Specification to how setting up the detailed explanation of being mapped with of the two).It mainly is to the controlling alternately of assembly, so that extract assembly easily that this assembly is in logic separated.When setting up domain logic, next, is the two-level logic zone for each one-level logic region---the territory reference table has been set up in the territory---resource has been set up resource and has been attended table.All resources in the recording domain then attended to show in territory reference table record and self associated territory, resource; They are controlled the visit of field object and resource object respectively.Being established as the assembly of extracting damage and carrying out fast assembly of these two tables switched and laid a good foundation.
Generally (Field Replaceable can be used to the system component of the hot plug in generation a hot swappable Field Replaceable in the ATCA server, be that each hot swappable system component can be regarded an on-the-spot unit of replacing as, claim FRU again) abstract be a resource; After the assembly in the system breaks down, navigate to the residing resource of this entity fast according to physical path.After navigating to the assembly of damage, only the resource of this entity correspondence need be shifted out resource and attend table, refresh resource then and attend table, all can the stopping alternately of all and this entity is (because resource is can hot plug like this, entity then can not, so in order to provide reliable service directly to carry out the hot plug of resource).Then, the simple field descriptor that contains the redundancy of damaging assembly---add in the territory reference table that damages assembly, other assembly still can have access to corresponding entity like this.The switching of assembly is transparent to upper layer application.Fig. 2 is the detailed description to this process; Because ATCA server itself designs based on the framework of redundancy, generally the assembly of redundancy is divided into an independently simple field (as shown in Figure 2, the redundant component of resource 2 is in the simple field).When resource 2 break down be moved out of resource and attend table after, territory B can be joined in the territory reference table of territory A simultaneously, system still can continue the visit of resource 2 like this, thereby has guaranteed the availability that does not influence system service that shifts out of damage assembly.Certainly be not that all system components all have redundancy, but these assemblies that do not have redundancy generally are equipment very little to the system service influence or that be difficult for breaking down.Simultaneously for the availability that guarantees system has adopted the mode (promptly when the constructing system, with one to two veneer as redundant plate) of plate level redundancy for this exception, and then the hot plug of employing veneer guarantees the high availability of system service.
Accompanying drawing 3 has provided the state exchange synoptic diagram of hot-swap.By this synoptic diagram, can see the hot plug strategy is supported among the present invention five transition states and possible transition relationship.
Do not exist: existence is not actually a virtual state, and it represents that a certain resource is not in current domain logic.The resource that is in this state is meant that Field Replaceable (FRU) physically is inserted into state before or it has been attended from the resource of system to shift out the table.Support the resource of complete hot plug model to move to this state from non-activated state (INACTIVE), if but producing accident extracts, and resource can be transformed into this state from free position (insert and hang up, activate, extract hang-up).When moving to not existence, the resource hot pluggable condition can issue HS STATE NOT_PRESENT hot plug incident.This incident can illustrate normal migration or unexpected migration.Event level is Information_normal during normal the migration.After the resource failed relevant with FRU, all territories can find that all " there is not " state in FRU, and report that moves to the not incident of existence.If resource is resumed subsequently, system will detect FRU, and reports another migration event (never having current hot pluggable condition).
Insert to hang up: just be referred to as to enter hot plug after can managing in certain territory and insert suspended state when a resource of supporting complete hot plug is inserted in the system physically and logically is added to.This state shows new equipment adding system is arranged and carried out processing in logic.After entering the insertion suspended state, respective resources issue HS_STATE_INS_PENDING incident.Physically after entering slot, equipment produces this incident.After system console received this incident, the system manager can check the ability of this resource before powering up for this resource by FRU.Can carry out at this state FRU and to power on and reset operation.
Activate: activated state represents that resource is active member in the territory.After FRU finished the hardware connection procedure, relevant resource entered state of activation.But this does not mean that FRU activates at software layer, and this only shows that FRU has powered on and has been in and enlivens attitude in system, can not arbitrarily pull out, and also needs to carry out the activation manipulation on the software.After entering state of activation, resource can be issued the HS_STATE_ACTIVE incident of producing.
Extract hang-up: extract suspended state and represent that the system resource request extracts associated FRU, generally after pressing the hot plug button, enter and extract suspended state.Produce hot plug incident HS_STATE_EXT_PENDING simultaneously.HPI user can unload driving after being subjected to this incident, redistributes processor or unloading of file system (disconnecting software connects); Electricity disconnection physical connection is extracted resource down then.
Non-activated state: the resource that non-activated state expresses support for complete hot plug is sluggish in system, and it has been finished and extracts processing.After the disconnection on the FRU realization hardware, it is logically isolated with electrical specification aspect and platform, but from seeing that physically it is still in system platform, so still have this resource in the relevant territory.Can generation incident HS_STATE_INACTIVE after the hot pluggable condition of resource is moved to non-activated state.
Accompanying drawing 4 has provided the flowchart that heat is inserted in the hot plug process.In fact, this is that the implementation procedure that the assembly adding system of hot plug is supported in process control is handled in hot plug.
At first be Drive Layer, this generally is responsible for realization by ATCA hardware device supplier, and each equipment supplier can provide good driver to be supported for the hardware of oneself, only needs that it is carried out suitable compiling and gets final product.After inserting a FRU entity to the ATCA server, new entity can send electric signal after inserting, and the interrupt service routine of device driver begins to carry out after receiving signal; Interrupt service routine scanning whole C ompactPCI bus reads the hot-swap register, removes corresponding state, and changes inventory according to the INS/EXT mode bit apparatus for establishing of equipment, notice hot-swap processing threads.Hot-swap processing threads fetch equipment change inventory, can find to have the equipment of firm insertion, the notifying operation system rescans the CompactPCI bus then, and been scanned operating system can be called call_usermodehelper and user's space carries out alternately by kernel function request_module.This function can be arg[1] be initialized to will load-on module name, then utilization/sbin/modprobe and configuration file/etc/modprobe.conf determine will load-on module details.The hot-swap handling procedure of transferring user's space behind the driver module loaded to carries out remaining operation.
Finger daemon in the hot-swap handling procedure can be found initiate FRU entity, and tells the system manager to have new entity to add system to system console transmission message.After the system manager waits for that the operating system load driver finishes, the FRU entity is joined in certain territory (selection in territory can according to keeper's self custom, because the division of system initialization time domain is also fully by system manager's decision) by Addresource command calls function R esourceAdd.After the operation that the ResourceAdd function adds novel entities is finished, can call automatically that the Rptflush function refreshes when setting up domain logic to be safeguarded resource attend table (RPT table).The final system keeper system console fill order hotplug-active, this order can be called the ResourceActive function and be activated new entity make it to be in active state in the territory, and service normally is provided.
Accompanying drawing 5 has provided the flowchart that hot drawing goes out in the hot plug process, and in fact, this is that hot plug processing process control supports the assembly of hot plug to shift out the implementation procedure of system.
At first remain Drive Layer, mainly describe the processing procedure that shifts out of hot-swap program here.To carry out heat to assembly and shift out, need be positioned at the relevant position of assembly in the domain logic according to physical path.Detailed process as shown in Figure 5, can brief overview be following some:
The residing domain logic of the logical model of positioning component correspondence;
Carry out Inactive instruction passivation reorganization part, stop the session of other assembly and its generation;
Resource is shifted out residing domain logic; Promptly the resource of safeguarding from the territory attends to reject the table this assembly;
Refresh resource and attend table;
Unloading drives, from physically extracting assembly;
The domain logic information at the backup assembly place of this assembly is added in the territory reference table of safeguarding in this territory, assembly place; The application on upper strata just can be arrived this assembly by the mode access of hierarchy domain visit like this.This process has been safeguarded the availability of system service;
Reload driving; Guarantee backup assembly operate as normal.
Claims (8)
1, a kind of hot-swap processing method based on the HPI model comprises that heat is inserted and heat shifts out, and it is characterized in that the treating method comprises domain logic separate mechanism and hot plug treatment mechanism;
Described domain logic separate mechanism is carried out in logic grouping management in the mode of resource for entity with the hot plug assembly is abstract, resource divides into groups to manage in the mode in territory again, when hot drawing goes out, described domain logic separate mechanism is controlled the visit of field object and resource object, has guaranteed that shifting out of assembly do not influence the availability of system service;
Hot plug treatment mechanism and domain logic separate mechanism are mutual, realization is to the initialization of domain logic, system component is in the different domain logics, and is responsible for heat is inserted and heat shifts out in the process state of assembly and controls, guaranteed the insertion of assembly and shifted out the availability that does not influence system service.
2, the hot-swap processing method based on the HPI model according to claim 1, it is characterized in that described domain logic separate mechanism is divided into a plurality of domain logics to system component, and be that each one-level logic region---the territory reference table has been set up in the territory when setting up domain logic, being the two-level logic zone---resource has been set up resource and has been attended table;
Territory reference table record and self associated territory, and control is to the visit of field object;
Resource attends to show all resources in the recording domain then, and control is to the visit of resource object.
3, the hot-swap processing method based on the HPI model according to claim 2, it is characterized in that described domain logic separate mechanism with the redundant component of system as simple logic territory independently.
4, the hot-swap processing method based on the HPI model according to claim 3 is characterized in that redundant component can be the redundancy of plate level, also can be the redundancy of hot plug assembly.
5, according to claim 2 or 3 or 4 described hot-swap processing methods based on the HPI model, it is characterized in that when component heat shifts out, described hot plug treatment mechanism shifts out resource with the resource of this assembly entity correspondence and attends table, refresh resource then and attend table, make all and the mutual termination of this entity move; Then, the simple logic territory descriptor that contains the redundancy that shifts out assembly is joined in the territory reference table of this assembly, make other assembly still can have access to the entity that shifts out the assembly correspondence.
6, the hot-swap processing method based on the HPI model according to claim 1 is characterized in that described hot plug treatment mechanism is inserted heat and heat shifts out in the process State Control of assembly and comprises state is divided into not existence, inserts suspended state, state of activation, extracts suspended state, unactivated state;
Described not existence can be switched to the insertion suspended state, insert suspended state and can be switched to state of activation, state of activation can be switched to extracts suspended state, extract suspended state and can be switched to unactivated state, described insertion suspended state, state of activation, extract suspended state, unactivated state and all can be switched to not existence.
7, the hot-swap processing method based on the HPI model according to claim 1 is characterized in that the hot insertion process of described hot plug treatment mechanism comprises load driver and client layer hot plug control;
Described load driver is behind assembly of new insertion, the interrupt service routine of device driver scans whole C ompactPCI bus after receiving signal, been scanned calls call_usermodehelper by kernel function request_module and user's space carries out alternately, kernel function request_module is arg[1] be initialized to will load-on module name, then utilization/sbin/modprobe and configuration file/etc/modprobe.conf determine will load-on module details;
Described client layer hot plug control joins the pairing FRU entity of plug-in package in the territory by Addresource command calls function R esourceAdd, after the operation of ResourceAdd function adding novel entities is finished, can call automatically that the Rptflush function refreshes when setting up domain logic to be safeguarded resource attend table, last fill order hotplug-〉active, this order can be called the new entity of ResourceActive function activation and make it to be in active state in the territory, and service normally is provided.
8, the hot-swap processing method based on the HPI model according to claim 11, the heat that it is characterized in that described hot plug treatment mechanism shift out process and shift out the residing domain logic of the pairing logical model of assembly in the location earlier; And carry out Inactive instruction passivation reorganization part, stop the session of other assembly and its generation; Then resource is shifted out residing domain logic, promptly the resource of safeguarding from the territory attends to reject the table this assembly; Refresh resource again and attend table, make all with this assembly institute correspondent entity all stop alternately move; Domain logic information with the redundant component place of this assembly adds in the territory reference table of safeguarding in this territory, assembly place at last, makes mode access that other application can be by the hierarchy domain visit to this assembly.
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| CN106155801A (en) * | 2015-03-27 | 2016-11-23 | 华为技术有限公司 | A kind of method of equipment transportation and resource management center |
| CN106155801B (en) * | 2015-03-27 | 2019-06-28 | 华为技术有限公司 | A kind of method and resource management center of equipment transportation |
| CN107590045A (en) * | 2017-08-24 | 2018-01-16 | 郑州云海信息技术有限公司 | A kind of method for carrying out hot plug test to EIO boards under linux system |
| CN109032972A (en) * | 2018-07-25 | 2018-12-18 | 郑州云海信息技术有限公司 | A kind of processing method and system of hot plugging event |
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