CN103473067A - Embedded Linux partitioning and data recovery method, embedded Linux partitioning and data recovery system and system development method - Google Patents
Embedded Linux partitioning and data recovery method, embedded Linux partitioning and data recovery system and system development method Download PDFInfo
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Abstract
The invention discloses an embedded Linux partitioning and data recovery method which comprises the following steps that S101, a bootloader creates an initial partition table in an information area; S102, the bootloader upgrades a mirror image program according to the initial partition table, upgrades the partition table according to an upgraded mirror image data address and stores upgraded mirror image data into a backup mirror image partition; and S103, the bootloader transmits partition information into a Linux inner core, the Linux inner core analyzes the partition information and the partition information which is successfully analyzed is associated with a storage medium. The invention also discloses an embedded Linux partitioning and data recovery system and a system development method. Compared with the prior art, the embedded Linux partitioning and data recovery method has the advantages that dynamic partitioning on an embedded Linux system and fault recovery of a file system can be implemented; and maintenance and development cost of a product is reduced.
Description
Technical field
The present invention relates to computer application field, relate in particular to a kind of built-in Linux subregion and data restoration method, system and system development method.
Background technology
Embedded Linux system is used at present widely in electron trade and microcomputer industry, is characterized in developing convenient, portable strong, task highly-efficient treatment and saving hardware resource.
Embedded Linux system main data storage medium at present has hard disk, Nandflash and iNand/SD/MMC, and wherein Nandflash is due to storer cheap, that memory capacity large and highly versatile is generally used in industry.Nandflash is because the electrical specification of himself is to carry out Update Table with charge-discharge principle, this will inevitably cause the storage unit of data, produce the number of non-compliances certificate after repeatedly revising, this number of non-compliances is according to the storage unit at place, we are commonly called as bad piece (invalid block), the generation of bad piece a series of data storage problems such as will inevitably cause the breakage of file system under linux system and subregion normally not to use.
In view of the phenomenon of bad piece may appear in the Linux storage medium, and Embedded Industry is used the subregion of Linux generally to use default settings in linux kernel at present, can have the failure of subregion carry and the abnormal risk of file system data.
Summary of the invention
For addressing the above problem, the technical scheme that the present invention adopts is:
A kind of built-in Linux subregion and data restoration method are provided, comprise step: S101, bootloader create the primary partition table in block of information, partition table is for recording the corresponding partition information of mirrored partition, and mirrored partition comprises bootloader subregion, linux kernel subregion, backup image subregion, root file system subregion, user file system partitioning; S102, bootloader be according to primary partition table upgrade image program, and according to the mirror image data address regeneration block table of upgrading, and the mirror image data of upgrading is stored to the backup image subregion; S103, bootloader import partition information into linux kernel, and linux kernel is resolved partition information and the partition information of successfully resolved is associated with storage medium.
Another technical solution used in the present invention is:
A kind of built-in Linux subregion and data restoring system development approach are provided, comprise step: the external Man Machine Interface of bootloader is set, for supporting under default delivering path, the upgrading of all subregion mirror images of data storage medium and parameter setting; The bootloader data storage medium is set and drives interface, for judging bad piece and correctly reading and writing data; Preset primary partition table in the bootloader code, partition table is kept at block of information, block of information is the configuration information district, position that bad piece can not appear in data storage medium, partition table is for recording the corresponding partition information of mirrored partition, and mirrored partition comprises bootloader subregion, linux kernel subregion, backup image subregion, root file system subregion, user file system partitioning; In the bootloader code, design bad block management mechanism, when bad piece appears in the programmed decision of bootloader upgrade image, skip bad piece by the start address of subregion and move backward, and the start address of new subregion is updated to partition table.The partition information data layout that design Linux can identify in the bootloader code is to import partition table into linux kernel, and partition information comprises start address, subregion capacity, the zone attribute of partition number, partition name, subregion; Add the analytical function to the partition information data layout in the Linux source code, for kernel, resolve partition information and the partition information of successfully resolved is associated with storage medium, wherein resolving is in early or init stage.
Built-in Linux subregion provided by the invention and data restoration method, system and system development method, utilize management and the protection of bootloader to each mirror image, when starting, embedded Linux kernel imports dynamic partition information into, the partition information that embedded Linux kernel parsing bootloader imports into is also associated with data storage medium, root file system is read-only and can guide carry user file system, when carry failure or customer requirements reduction, obliterated data storage medium mark zone marked invalid, bootloader judges that whether the user file system region is invalid while starting, if invalid, it is reduced from backup area.Compared to prior art, the present invention increases embedded Linux system dynamic partition, the reduction of file system fault, reduces maintenance and the cost of development of product.
The accompanying drawing explanation
Fig. 1 is the flowchart of a kind of built-in Linux subregion and data restoring system development approach in an embodiment of the present invention;
Fig. 2 is the mirrored partition schematic diagram in an embodiment of the present invention;
Fig. 3 is the flowchart of a kind of built-in Linux subregion and data restoration method in an embodiment of the present invention;
Fig. 4 is the concrete flowchart of data reduction step;
Fig. 5 is the concrete flowchart of step S102;
Fig. 6 is a kind of built-in Linux subregion and data restoring system in an embodiment of the present invention;
Fig. 7 is the functional block diagram of upgrading module in Fig. 6.
The main element symbol description
Embodiment
By describing technology contents of the present invention, structural attitude in detail, being realized purpose and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.
Referring to Fig. 1, is the flowchart of a kind of built-in Linux dynamic partition and data restoring system development approach in an embodiment of the present invention.
A kind of built-in Linux subregion and data restoring system development approach, comprise the steps:
Step S301, the external Man Machine Interface of bootloader is set, described external Man Machine Interface is for supporting under default delivering path, the upgrading of all subregion mirror images of data storage medium and parameter setting.
Step S302, the bootloader data storage medium is set drives interface, described storage medium drives interface for judging bad piece and correctly reading and writing data.
Step S303, in the bootloader code preset primary partition table, partition table is kept at block of information, block of information is the configuration information district, position that bad piece can not appear in data storage medium, partition table is for recording the corresponding partition information of mirrored partition.Referring to Fig. 2, is the mirrored partition schematic diagram in an embodiment of the present invention.In the present embodiment, mirrored partition comprises bootloader subregion, linux kernel subregion, backup image subregion, root file system subregion, user file system partitioning.
Step S304, in the bootloader code design bad block management mechanism, described bad block management mechanism is for when bad piece appears in the programmed decision of bootloader upgrade image, the start address of subregion is skipped to bad piece and move backward, and after completing movement, the start address of new subregion is updated to partition table.
Step S305, the partition information data layout that design Linux can identify in the bootloader code, partition information comprises start address, subregion capacity, the zone attribute of partition number, partition name, subregion.
Particularly, the partition information group is wrapped in cmdline, its form is as follows:
cmdline=mtdarry:[num],[name],[start],[size],[opt]；
Wherein, num means the mtd partition number, and name means the mtd partition name, and start means the start address of current subregion, and size means the subregion capacity, and opt means zone attribute.
Step S306, add the analytical function to the partition information data layout in the Linux source code, described analytical function is resolved partition information and the partition information of successfully resolved is associated with storage medium for kernel, and wherein resolving is in early or init stage.
In the present embodiment, described a kind of built-in Linux dynamic partition and data restoring system development approach also comprise step:
Step S307, in the bootloader code designing backup mechanism, described back mechanism is for being stored to the mirror image data of upgrading backup image subregion backup.
Step S308, add the carry failure mechanism in the script of root file system carry user file system, described carry failure mechanism for being labeled as the illegal starting system of laying equal stress on by the user file system partitioning when carry is failed.
Step S309, in the bootloader code, design reduction mechanism, described reduction mechanism is illegal for before starting at linux kernel, judging whether the user file system partitioning is labeled as, and from described backup image subregion, the mirror image data of upgrading is copied to the user file system partitioning when judgement is illegal, it is legal then the user file system partitioning to be labeled as.
Wherein, also comprise step before described step S308: add an implementing procedure for erasable subregion in root file system; Described " by the user file system partitioning, being labeled as illegal " is specially: use described implementing procedure that the user file system partitioning is wiped to 10 pieces with the 0th block address skew; Described " judging whether the user file system partitioning is labeled as illegal " is specially: judge whether the data on the 0th block address of user file system partitioning are wiped free of, if be wiped free of be judged to be illegal; Described " it is legal that the user file system partitioning is labeled as " is specially the data markers on the 0th block address of user file system partitioning as using.For example, suppose that the user file system is at mtd the 3rd subregion, and belong to the UBI file system, add as issued orders:
The meaning of above order is, carry mtd3 subregion, if failure mtd3 is wiped to 10 pieces, then software restarting equipment with 0 address offset.
Wherein, described implementing procedure is used open source software mtd-utils-tools compiling to generate.
Built-in Linux subregion of the present invention and data restoring system development approach, the system that solved causes bad piece of the data storage medium normal problem of using of subregion that exerts an influence in escalation process repeatedly, has reduced modification and the maintenance of kernel source code; Having solved the damaged situation of file system can't carry, thereby need to do over again maintenance replacement data storage medium and the problem that refreshes mirror image, has saved to a great extent development and maintenance cycle and cost.
Below the built-in Linux dynamic partition developed based on above-mentioned development approach and performed a kind of built-in Linux dynamic partition and the data restoration method of data restoring system are described.
Referring to Fig. 3, is the flowchart of a kind of built-in Linux subregion and data restoration method in an embodiment of the present invention, comprises step:
Step S101, bootloader create the primary partition table in block of information, partition table is for recording the corresponding partition information of mirrored partition, and mirrored partition comprises bootloader subregion, linux kernel subregion, backup image subregion, root file system subregion, user file system partitioning.
Wherein, described block of information is the position that bad piece can not appear in data storage medium, and described partition information comprises start address, the subregion capacity of each subregion.
Step S102, bootloader be according to primary partition table upgrade image program, and according to the mirror image data address regeneration block table of upgrading, and the mirror image data of upgrading is stored to the backup image subregion.
Step S103, bootloader import partition information into linux kernel, and linux kernel is resolved partition information and 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 comprise the data reduction step, refer to Fig. 4, are the concrete flowchart of data reduction step.This data reduction step specifically comprises:
It is legal that step S201, bootloader judged whether the user file system partitioning is labeled as before linux kernel starts, and if not, enters step S202, if enter step S203;
Step S202, bootloader copy to the user file system partitioning from described backup image subregion by the mirror image data of upgrading, and it is legal then the user file system partitioning to be labeled as, and enters step S201;
Step S203, after linux kernel starts, carry out root file system carry alternative document system and also judge whether the carry success, if not, enter step S204, if system is normally moved;
Step S204, the user file system partitioning is labeled as to the illegal starting system of laying equal stress on.
Wherein, described " being labeled as illegal by the user file system partitioning " concrete steps are: the tool using program is wiped 10 pieces by the user file system partitioning with the 0th block address skew; Described " judging whether the user file system partitioning is labeled as illegal " is specially: judge whether the data on the 0th block address of user file system partitioning are wiped free of, if be wiped free of be judged to be illegal; Described " it is legal that the user file system partitioning is labeled as " is specially the data markers on the 0th block address of user file system partitioning as using.
Wherein, referring to Fig. 5, is the concrete flowchart of step S102.Described step S102 specifically comprises:
Step S1021, bootloader download to linux kernel, user file system and other data in specified partition, in this process, if the subregion head in bad piece zone, moves a unit by the corresponding data of subregion, the table of regeneration block simultaneously backward;
Step S1022, when bootloader upgrade image program, judge whether to occur bad piece;
Step S1023, when bad piece judge occurring, the start address of subregion is skipped to bad piece and moves backward;
Step S1024, when complete mobile after, the start address of new subregion is updated to partition table.
Referring to Fig. 6, is in the functional module of a kind of built-in Linux dynamic partition and data restoring system in an embodiment of the present invention.Described built-in Linux dynamic partition and data restoring system 100 comprise creation module 10, upgrading module 20, relating module 30.
Upgrading module 20 is for using 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 image data of upgrading is stored to the backup image subregion;
Relating module 30 is for using bootloader to import partition information into linux kernel, and linux kernel is resolved partition information and the partition information of successfully resolved is associated with storage medium.
Wherein, described block of information is the position that bad piece can not appear in data storage medium, and described partition information comprises start address, the subregion capacity of each subregion.
In the present embodiment, described a kind of built-in Linux subregion and data restoring system 100 also comprise the first judge module 40, replication module 50, carry judge module 60, restart module 70.
The first judge module 40 is legal for using bootloader to judge whether the user file system partitioning is labeled as before linux kernel starts.
When replication module 50 is legal for being labeled as when the first judge module 40 judgement user file systems, use bootloader, from described backup image subregion, the mirror image data of upgrading is copied to the user file system partitioning, then it is legal the user file system partitioning to be labeled as, and then notifies the first judge module 40 to carry out decision operation.
Referring to Fig. 7, is the functional block diagram of upgrading module in Fig. 6.In the present embodiment, described upgrading module 20 specifically comprises that downloading submodule 21, upgrading judgement submodule 22, bad piece skips submodule 23, upgrades submodule 24.
Bad piece is skipped submodule 23 and, the start address of subregion is skipped to bad piece and move backward when judging the bad piece of appearance for judge submodule when upgrading.
Built-in Linux subregion provided by the invention and data restoration method, system and system development method, utilize management and the protection of bootloader to each mirror image, when starting, embedded Linux kernel imports dynamic partition information into, the partition information that embedded Linux kernel parsing bootloader imports into is also associated with data storage medium, root file system is read-only and can guide carry user file system, when carry failure or customer requirements reduction, obliterated data storage medium mark zone marked invalid, bootloader judges that whether the user file system region is invalid while starting, if invalid, it is reduced from backup area.Compared to prior art, the present invention can realize embedded Linux system dynamic partition, the reduction of file system fault are reduced to maintenance and the cost of development of product.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes instructions of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present invention.
Claims (12)
1. a built-in Linux subregion and data restoration method, is characterized in that, comprises step:
S101, bootloader create the primary partition table in block of information, partition table is for recording the corresponding partition information of mirrored partition, and mirrored partition comprises bootloader subregion, linux kernel subregion, backup image subregion, root file system subregion, user file system partitioning;
S102, bootloader be according to primary partition table upgrade image program, and according to the mirror image data address regeneration block table of upgrading, and the mirror image data of upgrading is stored to the backup image subregion;
S103, bootloader import partition information into linux kernel, and linux kernel is resolved partition information and the partition information of successfully resolved is associated with storage medium.
2. a kind of built-in Linux subregion according to claim 1 and data restoration method, is characterized in that, described block of information is the position that bad piece can not appear in data storage medium, and described partition information comprises start address, the subregion capacity of each subregion.
3. a kind of built-in Linux subregion according to claim 2 and data restoration method, is characterized in that, also comprises the data reduction step, and this data reduction step specifically comprises:
It is legal that S201, bootloader judged whether the user file system partitioning is labeled as before linux kernel starts, and if not, enters step S202, if enter step S203;
S202, bootloader copy to the user file system partitioning from described backup image subregion by the mirror image data of upgrading, and it is legal then the user file system partitioning to be labeled as, and enters step S201;
S203, after linux kernel starts, carry out root file system carry alternative document system and also judge whether the carry success, if not, enter step S204, if system is normally moved;
S204, the user file system partitioning is labeled as to the illegal starting system of laying equal stress on.
4. a kind of built-in Linux subregion according to claim 2 and data restoration method, is characterized in that, described step S102 specifically comprises:
Bootloader downloads to linux kernel, user file system and other data in specified partition, in this process, if the subregion head in bad piece zone, moves a unit by the corresponding data of subregion, the table of regeneration block simultaneously backward;
When bootloader upgrade image program, judge whether to occur bad piece;
When judging the bad piece of appearance, the start address of subregion is skipped to bad piece and move backward;
After completing movement, the start address of new subregion is updated to partition table.
5. a built-in Linux subregion and data restoring system, is characterized in that, comprising:
Creation module, for using bootloader to create the primary partition table in block of information, partition table is for recording the corresponding partition information of mirrored partition, and mirrored partition comprises bootloader subregion, linux kernel subregion, backup image subregion, root file system subregion, user file system partitioning;
The upgrading module, for using 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 image data of upgrading is stored to the backup image subregion;
Relating module, import partition information into linux kernel for using bootloader, and linux kernel is resolved partition information and the partition information of successfully resolved is associated with storage medium.
6. a kind of built-in Linux subregion according to claim 5 and data restoring system, is characterized in that, described block of information is the position that bad piece can not appear in data storage medium, and described partition information comprises start address, the subregion capacity of each subregion.
7. a kind of built-in Linux subregion according to claim 6 and data restoring system, is characterized in that, also comprises:
The first judge module, legal for using bootloader to judge whether the user file system partitioning is labeled as before linux kernel starts;
Replication module, when legal for being labeled as when the first judge module judgement user file system, use bootloader, from described backup image subregion, the mirror image data of upgrading is copied to the user file system partitioning, then it is legal the user file system partitioning to be labeled as, and then notifies the first judge module to carry out decision operation;
The carry judge module, for judging that when the first judge module the user file system marks is when legal, and, after linux kernel starts, carry out root file system carry alternative document system and also judge whether the carry success, if system is normally moved;
Restart module, while for judging when the carry judge module, there is no the carry success, the user file system partitioning is labeled as to the illegal starting system of laying equal stress on.
8. a kind of built-in Linux subregion according to claim 6 and data restoring system, is characterized in that, described upgrading module specifically comprises:
Download submodule, for using bootloader that linux kernel, user file system and other data are downloaded to specified partition, in this process, if the subregion head is in bad piece zone, the corresponding data of subregion is moved to a unit backward, the table of regeneration block simultaneously;
Upgrading judgement submodule, for when the bootloader upgrade image program, judge whether to occur bad piece;
Bad piece is skipped submodule, for judge submodule when upgrading, when judging the bad piece of appearance, the start address of subregion is skipped to bad piece and move backward;
Upgrade submodule, for after skipping submodule when bad piece and completing movement, the start address of new subregion is updated to partition table.
9. a built-in Linux subregion and data restoring system development approach, is characterized in that, comprises step:
The external Man Machine Interface of bootloader is set, and described external Man Machine Interface is used for supporting under default delivering path, the upgrading of all subregion mirror images of data storage medium and parameter setting;
The bootloader data storage medium is set and drives interface, described data storage medium drives interface for judging bad piece and correctly reading and writing data;
Preset primary partition table in the bootloader code, partition table is kept at block of information, block of information is the configuration information district, position that bad piece can not appear in data storage medium, partition table is for recording the corresponding partition information of mirrored partition, and mirrored partition comprises bootloader subregion, linux kernel subregion, backup image subregion, root file system subregion, user file system partitioning;
Design bad block management mechanism in the bootloader code, described bad block management mechanism is for when bad piece appears in the programmed decision of bootloader upgrade image, the start address of subregion is skipped to bad piece and move backward, the start address of new subregion is updated to partition table;
The partition information data layout that design Linux can identify in the bootloader code, partition information comprises start address, subregion capacity, the zone attribute of partition number, partition name, subregion;
Add the analytical function to the partition information data layout in the Linux source code, described analytical function is resolved partition information and the partition information of successfully resolved is associated with storage medium for kernel, and wherein resolving is in early or init stage.
10. a kind of built-in Linux subregion according to claim 9 and data restoring system development approach, is characterized in that, also comprises step:
Designing backup mechanism in the bootloader code, described back mechanism is for being stored to the mirror image data of upgrading the backup of backup image subregion;
Add the carry failure mechanism in the script of root file system carry user file system, described carry failure mechanism for being labeled as the illegal starting system of laying equal stress on by the user file system partitioning when carry is failed;
Design reduction mechanism in the bootloader code, described reduction mechanism is illegal for before starting at linux kernel, judging whether the user file system partitioning is labeled as, and from described backup image subregion, the mirror image data of upgrading is copied to the user file system partitioning when judgement is illegal, it is legal then the user file system partitioning to be labeled as.
11. a kind of built-in Linux subregion according to claim 10 and data restoring system development approach, is characterized in that, also comprises step: add an implementing procedure for erasable subregion in root file system;
Described " by the user file system partitioning, being labeled as illegal " is specially: use described implementing procedure that the user file system partitioning is wiped to 10 pieces with the 0th block address skew;
Described " judging whether the user file system partitioning is labeled as illegal " is specially: judge whether the data on the 0th block address of user file system partitioning are wiped free of, if be wiped free of be judged to be illegal;
Described " it is legal that the user file system partitioning is labeled as " is specially the data markers on the 0th block address of user file system partitioning as using.
12. a kind of built-in Linux subregion according to claim 11 and data restoring system development approach, is characterized in that, described implementing procedure is used open source software mtd-utils-tools compiling to generate.
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| CN106095620A (en) | 2016-11-09 |
| CN103473067B (en) | 2016-08-31 |
| CN106095620B (en) | 2019-02-05 |
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