CN106095620A - A kind of development approach of built-in Linux partition holding - Google Patents
A kind of development approach of built-in Linux partition holding Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
- G06F11/1469—Backup restoration techniques
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Abstract
The open a kind of built-in Linux subregion of the present invention and data restoration method, including step: S101, bootloader create primary partition table in the information area；S102, bootloader are according to primary partition table upgrade image program, and according to the mirror image data address regeneration block table of upgrading, and store the mirror image data of upgrading to backup image subregion；Incoming for partition information linux kernel, linux kernel are resolved partition information and are associated with storage medium by the partition information of successfully resolved by S103, bootloader.Invention additionally discloses a kind of built-in Linux subregion and data convert system and system development method.Compared to prior art, the present invention can realize, to embedded Linux system dynamic partition, the reduction of file system fault, reducing maintenance and the development cost of product.
Description
This case is with Application No. 201310435177.X, the applying date: JIUYUE 23 in 2013, entitled " embedded
Linux subregion and data restoration method, system and system development method " the divisional application that patent application is female case.
Technical field
The present invention relates to computer application field, particularly relate to a kind of built-in Linux subregion and data restoration method, be
System and system development method.
Background technology
Embedded Linux system is widely used in electron trade and microcomputer industry at present, is characterized in exploitation
Conveniently, portability is strong, task process is efficient and saving hardware resource.
Embedded Linux system data storage medium currently mainly has hard disk, Nandflash and iNand/SD/MMC,
Wherein Nandflash is owing to cheap, memory capacity is big and highly versatile is in the memorizer commonly used in industry.
Nandflash is to use charge-discharge principle to revise data due to the electrical characteristic of himself, and this inevitably results in depositing of data
Storage unit, produces number of non-compliances evidence after repeatedly amendment, and this number of non-compliances is according to the memory element at place, and we are commonly called as bad block
(invalid block), the generation of bad block inevitably results in the breakage of file system under linux system and subregion can not normally make
With waiting volume of data storage problem.
In view of Linux storage medium is likely to occur the phenomenon of bad block, and the subregion of the Linux of Embedded Industry use at present is general
All over using default settings in linux kernel, the failure of subregion carry and the risk of file system data exception can be there is.
Summary of the invention
For solving the problems referred to above, the technical scheme that the present invention uses is:
There is provided a kind of built-in Linux subregion and data restoration method, including step: S101, bootloader are in information
District creates primary partition table, and partition table is used for recording mirrored partition correspondence partition information, and mirrored partition includes that bootloader divides
District, linux kernel subregion, backup image subregion, root file system subregion, user file system partitioning；S102、bootloader
According to primary partition table upgrade image program, and according to the mirror image data address regeneration block table of upgrading, and the mirror by upgrading
As data store to backup image subregion；Incoming for partition information linux kernel, linux kernel are resolved by S103, bootloader
The partition information of successfully resolved is also associated by partition information with storage medium.
Another technical solution used in the present invention is:
There is provided a kind of built-in Linux subregion and data convert system development method, including step: arrange bootloader
Externally Man Machine Interface, is used for supporting under Preset Transfer approach, the upgrading of data storage medium all subregions mirror image and ginseng
Number is arranged；Bootloader data storage medium is set and drives interface, be used for judging bad block and correctly reading and writing data；?
Preset primary partition table in bootloader code, partition table is saved in the information area, and the information area is that data storage medium is impossible
The configuration information district, position of bad block occur, partition table is used for recording mirrored partition correspondence partition information, and mirrored partition includes
Bootloader subregion, linux kernel subregion, backup image subregion, root file system subregion, user file system partitioning；?
Bootloader code designs bad block management mechanism, when bad block occurs in bootloader upgrade image programmed decision, will divide
The initial address in district is skipped bad block and is moved rearwards by, and the initial address of new subregion is updated to partition table.In bootloader generation
Designing the partition information data form that is capable of identify that of Linux in Ma with by incoming for partition table linux kernel, partition information includes point
Area code, partition name, the initial address of subregion, subregion capacity, zone attribute；Linux source code adds partition information number
According to the analytical function of form, resolve partition information for kernel and the partition information of successfully resolved be associated with storage medium,
Wherein resolving is in early or the init stage.
The built-in Linux subregion that the present invention provides and data restoration method, system and system development method, utilize
Bootloader, to the management of each mirror image and protection, the incoming dynamic partition information when embedded Linux kernel starts, embeds
Formula linux kernel resolves partition information incoming for bootloader and associates with data storage medium, and root file system is read-only also
Can guide carry user file system, when carry failure or user require reduction, erasing data storage medium mark zone is also
Marked invalid, bootloader judges that user file system area is the most invalid when starting, and it is reduced from backup area if invalid.
Compared to prior art, the present invention increases embedded Linux system dynamic partition, the reduction of file system fault, reduces product
Maintenance and development cost.
Accompanying drawing explanation
Fig. 1 is the holding of a kind of built-in Linux subregion and data convert system development method in an embodiment of the present invention
Row flow chart；
Fig. 2 is the mirrored partition schematic diagram in an embodiment of the present invention；
Fig. 3 is a kind of built-in Linux subregion and the execution flow chart of data restoration method in an embodiment of the present invention；
Fig. 4 be data convert step specifically perform flow chart；
Fig. 5 be step S102 specifically perform flow chart；
Fig. 6 is a kind of built-in Linux subregion and data convert system in an embodiment of the present invention；
Fig. 7 is the functional block diagram of upgraded module in Fig. 6.
Main element symbol description
Built-in Linux dynamic partition and data convert system 100；
Creation module 10；
Upgraded module 20；
Relating module 30；
First judge module 40；
Replication module 50；
Carry judge module 60；
Restart module 70；
Download submodule 21；
Upgrading judges submodule 22；
Bad block skips submodule 23；
Update submodule 24.
Detailed description of the invention
By describing the technology contents of the present invention, structural feature in detail, being realized purpose and effect, below in conjunction with embodiment
And coordinate accompanying drawing to be explained in detail.
Refer to Fig. 1, be that in an embodiment of the present invention, a kind of built-in Linux dynamic partition is opened with data convert system
The execution flow chart of forwarding method.
A kind of built-in Linux subregion and data convert system development method, comprise the steps:
Step S301, arranging the external Man Machine Interface of bootloader, described external Man Machine Interface is used for supporting
Under Preset Transfer approach, the upgrading of data storage medium all subregions mirror image and parameter are arranged.
Step S302, arrange bootloader data storage medium drive interface, described storage medium drive interface be used for
Judge bad block and correctly read and write data.
Step S303, in bootloader code preset primary partition table, partition table is saved in the information area, and the information area is
Data storage medium is it is unlikely that the configuration information district, position of bad block, and partition table is used for recording mirrored partition correspondence subregion letter
Breath.Refer to Fig. 2, be the mirrored partition schematic diagram in an embodiment of the present invention.In the present embodiment, mirrored partition includes
Bootloader subregion, linux kernel subregion, backup image subregion, root file system subregion, user file system partitioning.
Step S304, in bootloader code design bad block management mechanism, described bad block management mechanism for work as
When bad block occurs in bootloader upgrade image programmed decision, the initial address of subregion is skipped bad block and is moved rearwards by, and worked as
Become, after moving, the initial address of new subregion is updated to partition table.
Step S305, the partition information data form that design Linux is capable of identify that in bootloader code, subregion is believed
Breath includes partition number, partition name, the initial address of subregion, subregion capacity, zone attribute.
Specifically, wrapping in cmdline by partition information group, its form is as follows:
Cmdline=mtdarry:[num], [name], [start], [size], [opt]；
Wherein, num represents mtd partition number, and name represents mtd partition name, and start represents the starting point of current bay
Location, size represents subregion capacity, and opt represents zone attribute.
Step S306, adding the analytical function to partition information data form in Linux source code, described analytical function is used
Resolving partition information in kernel and be associated with storage medium by the partition information of successfully resolved, wherein resolving is in
Early or the init stage.
In the present embodiment, described a kind of built-in Linux dynamic partition and data convert system development method, also
Including step:
Step S307, in bootloader code designing backup mechanism, described back mechanism for will upgrading mirror image
Data store to backup image Area-Specific Archive.
Step S308, in the script of root file system carry user file system add carry failure mechanism, described extension
Carry failure mechanism for user file system partitioning being labeled as when carry failure illegal starting system of laying equal stress on.
Step S309, designing reduction mechanism in bootloader code, described reduction mechanism is for opening at linux kernel
It is dynamic that to judge whether user file system partitioning is labeled as before illegal, and when judgement is illegal from described backup image subregion
The mirror image data of upgrading copies to user file system partitioning, and it is legal to be then labeled as by user file system partitioning.
Wherein, one work for erasable subregion of interpolation in root file system is further comprised the steps of: before described step S308
Tool program；Described " being labeled as illegal by user file system partitioning " is particularly as follows: use described implementing procedure by user file
System partitioning is with the 0th block address skew 10 blocks of erasing；Described " judging whether user file system partitioning is labeled as illegal "
Particularly as follows: whether the data judged in the 0th block address of user file system partitioning are wiped free of, if be wiped free of, it is judged to not
Legal；Described " it is legal to be labeled as by user file system partitioning " is specially in the 0th block address of user file system partitioning
Data markers for use.For example, it is assumed that user file system is at mtd the 3rd subregion, and belong to UBI file system, then add
Add as issued orders:
“ubiattch/dev/ubi_ctrl-m 3
mount-t ubifs ubi1:usrfs/usr
if[$？！=0]；
then
echo“mount fail”
/etc/mtd/flash_erase/dev/mtd3 0x0 10
echo“reboot”
reboot
else
echo“mount ok”
fi；”
The meaning more than ordered is, carry mtd3 subregion, if failure, by mtd3 with 0 address offset 10 blocks of erasing,
Then software restarting equipment.
Wherein, described implementing procedure uses open source software mtd-utils-tools compiling to generate.
The built-in Linux subregion of the present invention and data convert system development method, the system that solves was being upgraded repeatedly
Journey causes data storage medium bad block produce and affect the problem that subregion normally uses, decrease amendment and the dimension of kernel source code
Protect；Solve file system breakage cannot carry, thus need do over again maintenance replacement data storage medium with refresh mirror image
Problem, largely save exploitation maintenance period and cost.
Below to performed by the built-in Linux dynamic partition developed based on above-mentioned development approach and data convert system
A kind of built-in Linux dynamic partition illustrate with data restoration method.
Refer to Fig. 3, be a kind of built-in Linux subregion and the execution of data restoration method in an embodiment of the present invention
Flow chart, including step:
Step S101, bootloader create primary partition table in the information area, and it is corresponding that partition table is used for recording mirrored partition
Partition information, mirrored partition includes that bootloader subregion, linux kernel subregion, backup image subregion, root file system divide
District, user file system partitioning.
Wherein, the described information area be data storage medium it is unlikely that the position of bad block, described partition information includes respectively
The initial address of subregion, subregion capacity.
Step S102, bootloader are according to primary partition table upgrade image program, and according to the mirror image data ground of upgrading
Location regeneration block table, and the mirror image data of upgrading is stored to backup image subregion.
Step S103, bootloader are by incoming for partition information linux kernel, and linux kernel parsing partition information also will
The partition information of successfully resolved is associated with storage medium.
In the present embodiment, described a kind of built-in Linux subregion and data restoration method also include data convert
Step, refers to Fig. 4, be data convert step specifically perform flow chart.This data convert step specifically includes:
Step S201, bootloader judged whether user file system partitioning is labeled as before linux kernel starts
Legal, if it is not, enter step S202, if so, enter step S203；
The mirror image data of upgrading is copied to user file system from described backup image subregion by step S202, bootloader
System subregion, it is legal to be then labeled as by user file system partitioning, enters step S201；
Step S203, after linux kernel starts, perform root file system carry alternative document system and also judge whether to hang
Carrying successfully, if it is not, enter step S204, if so, system is properly functioning；
Step S204, user file system partitioning is labeled as illegal starting system of laying equal stress on.
Wherein, described " user file system partitioning is labeled as illegal " concretely comprise the following steps: use implementing procedure to use
File partition, family is with the 0th block address skew 10 blocks of erasing；Described " judge whether user file system partitioning is labeled as not
Legal " particularly as follows: whether the data judged in the 0th block address of user file system partitioning are wiped free of, if be wiped free of, sentence
It is set to illegal；Described " it is legal to be labeled as by user file system partitioning " is specially the 0th piece of user file system partitioning
Data markers on address is for use.
Wherein, refer to Fig. 5, be step S102 specifically perform flow chart.Described step S102 specifically includes:
Linux kernel, user file system and other data are downloaded to specified partition by step S1021, bootloader
In, in this process, if subregion head is in bad block region, the corresponding data of subregion is moved rearwards by a unit, updates simultaneously
Partition table；
Step S1022, when bootloader upgrade image program, it may be judged whether bad block occurs；
Step S1023, when judge occur bad block time, the initial address of subregion is skipped bad block and is moved rearwards by；
Step S1024, when complete mobile after, the initial address of new subregion is updated to partition table.
Refer to Fig. 6, be a kind of built-in Linux dynamic partition and data convert system in an embodiment of the present invention
In functional module.Described built-in Linux dynamic partition and data convert system 100 include creation module 10, upgraded module 20,
Relating module 30.
Creation module 10 is used for using bootloader to create primary partition table in the information area, and partition table is used for recording mirror image
Subregion correspondence partition information, mirrored partition includes bootloader subregion, linux kernel subregion, backup image subregion, root file
System partitioning, user file system partitioning.
Upgraded module 20 be used for using bootloader according to primary partition table upgrade image program, and according to the mirror of upgrading
As data address regeneration block table, and the mirror image data of upgrading is stored to backup image subregion；
Relating module 30 is used for using bootloader that incoming for partition information linux kernel, linux kernel are resolved subregion
The partition information of successfully resolved is also associated by information with storage medium.
Wherein, the described information area be data storage medium it is unlikely that the position of bad block, described partition information includes respectively
The initial address of subregion, subregion capacity.
In the present embodiment, described a kind of built-in Linux subregion and data convert system 100 also include that first sentences
Disconnected module 40, replication module 50, carry judge module 60, restart module 70.
First judge module 40 is used for using bootloader to judge that user file system was divided before linux kernel starts
It is legal whether district is labeled as.
Replication module 50, for when the first judge module 40 judges that user file system is labeled as legal, uses
The mirror image data of upgrading is copied to user file system partitioning, then by user from described backup image subregion by bootloader
File partition is labeled as legal, then notifies that the first judge module 40 performs to judge operation.
Carry judge module 60 is for judging that user file system marks as time legal, and is worked as when the first judge module 40
After linux kernel starts, performing root file system carry alternative document system and judge whether carry success, if so, system is just
Often run.
Restart module 70 for when carry judge module judge there is no carry success time, by user file system partitioning labelling
For illegal starting system of laying equal stress on.
Refer to Fig. 7, be the functional block diagram of upgraded module in Fig. 6.In the present embodiment, described upgraded module 20 has
Body includes downloading submodule 21, upgrading judges that submodule 22, bad block are skipped submodule 23, updated submodule 24.
Download submodule 21 to be used for using bootloader linux kernel, user file system and other data to be downloaded
In specified partition, in this process, if subregion head is in bad block region, the corresponding data of subregion is moved rearwards by a list
Unit, simultaneously regeneration block table.
Upgrading judges that submodule 22 is for when bootloader upgrade image program, it may be judged whether bad block occur.
When bad block skips submodule 23 for judging submodule when upgrading when judgement appearance bad block, by the initial address of subregion
Skip bad block to be moved rearwards by.
Update submodule 24 for when bad block skip submodule 23 complete mobile after, the initial address of new subregion is updated
To partition table.
The built-in Linux subregion that the present invention provides and data restoration method, system and system development method, utilize
Bootloader, to the management of each mirror image and protection, the incoming dynamic partition information when embedded Linux kernel starts, embeds
Formula linux kernel resolves partition information incoming for bootloader and associates with data storage medium, and root file system is read-only also
Can guide carry user file system, when carry failure or user require reduction, erasing data storage medium mark zone is also
Marked invalid, bootloader judges that user file system area is the most invalid when starting, and it is reduced from backup area if invalid.
Compared to prior art, the present invention can realize, to embedded Linux system dynamic partition, the reduction of file system fault, reducing and producing
The maintenance of product and development cost.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, every utilize this
Equivalent structure or equivalence flow process that bright description and accompanying drawing content are made convert, or are directly or indirectly used in other relevant skills
Art field, is the most in like manner included in the scope of patent protection of the present invention.
Claims (4)
1. the development approach of a built-in Linux partition holding, it is characterised in that include step:
Arranging the external Man Machine Interface of bootloader, described external Man Machine Interface is used for supporting Preset Transfer approach
Under, the upgrading of data storage medium all subregions mirror image and parameter are arranged；
Bootloader data storage medium is set and drives interface, described data storage medium drive interface be used for judging bad block with
And correctly read and write data；
Preset primary partition table in bootloader code, partition table is saved in the information area, and the information area is data storage medium
It is unlikely that the configuration information district, position of bad block, partition table is used for recording mirrored partition correspondence partition information, mirrored partition bag
Include bootloader subregion, linux kernel subregion, backup image subregion, root file system subregion, user file system partitioning；
Designing bad block management mechanism in bootloader code, described bad block management mechanism is for when bootloader upgrading mirror
When bad block occurring as programmed decision, the initial address of subregion is skipped bad block and is moved rearwards by, by the initial address of new subregion more
New to partition table；
In bootloader code, design the partition information data form that is capable of identify that of Linux, partition information include partition number,
Partition name, the initial address of subregion, subregion capacity, zone attribute；
Adding the analytical function to partition information data form in Linux source code, described analytical function resolves for kernel and divides
The partition information of successfully resolved is also associated by district's information with storage medium, and wherein resolving is in early or the init stage.
The development approach of a kind of built-in Linux partition holding the most according to claim 1, it is characterised in that also include
Step:
Designing backup mechanism in bootloader code, described back mechanism is for storing the mirror image data of upgrading to backup
Mirrored partition backs up
Adding carry failure mechanism in the script of root file system carry user file system, described carry failure mechanism is used for
When carry failure, user file system partitioning is labeled as illegal starting system of laying equal stress on；
Designing reduction mechanism in bootloader code, described reduction mechanism judged to use before starting at linux kernel
It is illegal whether file partition, family is labeled as, and the mirror image will upgraded from described backup image subregion when judging illegal
Data copy to user file system partitioning, and it is legal to be then labeled as by user file system partitioning.
The development approach of a kind of built-in Linux partition holding the most according to claim 2, it is characterised in that also include
Step: add an implementing procedure for erasable subregion in root file system；
Described " being labeled as illegal by user file system partitioning " is particularly as follows: use described implementing procedure by user file system
Subregion is with the 0th block address skew 10 blocks of erasing；
Described " judging whether user file system partitioning is labeled as illegal " is particularly as follows: judge the of user file system partitioning
Whether the data in 0 block address are wiped free of, if be wiped free of, are judged to illegal；
Described " it is legal to be labeled as by user file system partitioning " is specially in the 0th block address of user file system partitioning
Data markers is for use.
The development approach of a kind of built-in Linux partition holding the most according to claim 3, it is characterised in that described work
Tool program uses open source software mtd-utils-tools compiling to generate.
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106095620B (en) | 2019-02-05 |
| CN103473067A (en) | 2013-12-25 |
| CN103473067B (en) | 2016-08-31 |
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