CN102799691B - Filesystem conversion access method and filesystem conversion access means - Google Patents
Filesystem conversion access method and filesystem conversion access means Download PDFInfo
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Abstract
A kind of filesystem conversion access method and equipment, obtain the file directory list of the External memory equipment of access, the file directory list of reading this External memory equipment according to the file system format of access External memory equipment is the discernible file control table of target file system by the file directory list mapping of External memory equipment; According to mapping relations, the file of External memory equipment, file destination list are invented to the form identified or the compatible format of destination host; Above-mentioned filesystem conversion access method and filesystem conversion access means, by filesystem conversion access means is provided, exempting is the software of installing for accessing compatible file system on computer at destination host, non-compatible file system access support programs needn't be installed, can directly complete the access to non-compatible file system in External memory equipment by filesystem conversion access means, not only convenience file access, the security that more can greatly improve system access.
Description
Technical field
The present invention relates to the access method of incompatibility file system, particularly relate to a kind of filesystem conversion access method and filesystem conversion access means.
Background technology
Due to industry spot reliability requirement, can use the file system format that some reliabilities are high; Embedded system also can be used corresponding file system format according to different systems; The file system format using between different operating system also may be compatible. Special in mobile unit, as digital video recorder etc. need be at vehicle flame-out or device powers down or unexpected off-position ensure that data are not destroyed, higher to data backup memory reliability requirement, generally adopt the file system format that reliability is high. In the time of reading out data, just there will be like this inconvenience.
Want to make operating system can access non-compatible file system, the general method using has following two kinds: by amendment device drives, operating system can be accessed as the compatible file system of access;
Or remove to read each file by specific read-write application software, be then converted to operating system compatible format file.
On the computer that existing two kinds of technology all need to need to access at each, corresponding software is installed and is realized, for user brings many troubles, and need consumption calculations machine CPU and memory source.
Summary of the invention
Based on this, be necessary to provide a kind of filesystem conversion access method that can conveniently access incompatibility file system.
Meanwhile, provide a kind of filesystem conversion access means that can conveniently access incompatibility file system.
A kind of filesystem conversion access method, comprises the steps:
Acquisition of information step: obtain the file system of the External memory equipment of access, obtain the target file system of the destination host of access;
The identical determining step of system: judge that whether file system is identical with target file system,
If judge no, carry out
Mapping relations establishment step: the file directory list of obtaining the External memory equipment of access, the file directory list of reading this External memory equipment according to the file system format of access External memory equipment is the discernible file control table of target file system by the file directory list mapping of External memory equipment;
Switch process: the form identified or the compatible format that according to mapping relations, the file of External memory equipment, file directory list are invented to destination host.
In a preferred embodiment, also comprise: read step: if receive the access instruction of destination host, obtain file, the directory name of the pre-access of destination host, obtain the file directory list of External memory equipment according to file control table, thereby read corresponding to the corresponding data in External memory equipment according to the file of pre-access, directory name, and returning to driving, the form identified or the compatible format that the corresponding data in External memory equipment are converted to destination host send to destination host.
In a preferred embodiment, the described mapping relations step of setting up also comprises:
Node table obtaining step: obtain the node table of the file system of access External memory equipment,
File allocation table generates step: according to the transformational relation of the target file system of the file system of External memory equipment and destination host, node table is changed to the file allocation table of generating object file system;
File access control table generates step: obtain the file directory list of External memory equipment, file directory list is converted to the file access control table of target file system form or compatible format;
Physical file address mapping table establishment step: set up the physical file address mapping table being linked with the physical address of External memory equipment, the physical address of External memory equipment is pointed in the address in described physical file address mapping table.
In a preferred embodiment, the corresponding setting of fileinfo of the address information of described physical file address mapping table and described file access control table.
In a preferred embodiment, described read step also comprises: if receive the access instruction of destination host, obtain file, the directory name of the pre-access of destination host, obtain the address of file of pre-access to conduct interviews by physical file address mapping table; Described destination host accesses by USB device controller; Described External memory equipment is hard disk and accesses by hard-disk interface mouth.
A kind of filesystem conversion access means, comprising:
Acquisition of information module: obtain the file system of the External memory equipment of access, obtain the target file system of the destination host of access;
The identical judge module of system: judge that whether file system is identical with target file system,
If the identical judge module of system is judged as NO, described filesystem conversion access means also comprises:
Mapping relations are set up module: the file directory list of obtaining the External memory equipment of access, the file directory list of reading this External memory equipment according to the file system format of access External memory equipment is the discernible file control table of target file system by the file directory list mapping of External memory equipment;
Modular converter: the form identified or the compatible format that according to mapping relations, the file of External memory equipment, file directory list are invented to destination host.
In a preferred embodiment, also comprise:
Read module: if receive the access instruction of destination host, obtain file, the directory name of the pre-access of destination host, obtain the file directory list of External memory equipment according to file control table, thereby read corresponding to the corresponding data in External memory equipment according to the file of pre-access, directory name, and returning to driving, the form identified or the compatible format that the corresponding data in External memory equipment are converted to destination host send to destination host.
In a preferred embodiment, the described mapping relations module of setting up also comprises:
Node table acquisition module: obtain the node table of the file system of access External memory equipment,
File allocation table generation module: according to the transformational relation of the target file system of the file system of External memory equipment and destination host, node table is changed to the file allocation table of generating object file system;
File access control table generation module: obtain the file directory list of External memory equipment, file directory list is converted to the file access control table of target file system form or compatible format;
Physical file address mapping table is set up module: set up the physical file address mapping table being linked with the physical address of External memory equipment, the physical address of External memory equipment is pointed in the address in described physical file address mapping table.
In a preferred embodiment, the corresponding setting of fileinfo of the address information of described physical file address mapping table and described file access control table.
In a preferred embodiment, described read module also comprises: if receive the access instruction of destination host, obtain file, the directory name of the pre-access of destination host, obtain the physical address corresponding to External memory equipment of file of pre-access by physical file address mapping table according to file access control table to conduct interviews; Described destination host accesses by USB device controller; Described External memory equipment is hard disk and accesses by hard-disk interface.
Above-mentioned filesystem conversion access method and filesystem conversion access means, by filesystem conversion access means is provided, exempting is the software of installing for accessing compatible file system on computer at destination host, non-compatible file system access support programs needn't be installed, can directly complete the access to non-compatible file system in External memory equipment by filesystem conversion access means, not only convenience file access, the security that more can greatly improve system access. Filesystem conversion access means is by obtaining the file system of External memory equipment of access and the target file system of the destination host of access, judge that whether file system is identical with target file system, if the different file directory lists of obtaining the External memory equipment of access of judgement, the file directory list of reading this External memory equipment according to the file system format of access External memory equipment is the discernible file control table of target file system by the file directory list mapping of External memory equipment; And according to mapping relations, the file of External memory equipment, file directory list are invented to the form identified or the compatible format of destination host; Thereby will in External memory equipment, be converted to and the file of destination host compatibility with the incompatible file system of destination host or file, read to facilitate destination host to carry out data, simultaneously, be convenient to the high-reliability storage backup of External memory equipment, and conveniently read by filesystem conversion access means of the present invention, and improve the security of system access; Owing to can exempt destination host by filesystem conversion access means of the present invention, different file calling on compatibility software is installed, thereby has also been reduced the complexity of destination host, improve the security reliability of system.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the filesystem conversion access method of one embodiment of the invention;
Fig. 2 is the schematic flow sheet of the filesystem conversion access method of another preferred embodiment of the present invention;
Fig. 3 is the schematic flow sheet of the mapping relations establishment step of the filesystem conversion access method of one embodiment of the invention;
Fig. 4 is the schematic flow sheet of the filesystem conversion access method of further embodiment of this invention;
Fig. 5 is the functional block diagram schematic diagram of the filesystem conversion access means of one embodiment of the invention;
Fig. 6 is the functional block diagram schematic diagram of the filesystem conversion access means of another preferred embodiment of the present invention;
Fig. 7 is the functional block diagram schematic diagram that the mapping relations of the filesystem conversion access means of one embodiment of the invention are set up module.
Detailed description of the invention
As shown in Figure 1, the filesystem conversion access method of one embodiment of the invention, comprises the steps:
Step S101, acquisition of information step: obtain the file system of the External memory equipment of access, obtain the target file system of the destination host of access;
Step S103, the identical determining step of system: judge that whether file system is identical with target file system;
If judge no, carry out
Step S105, mapping relations establishment step: the file directory list of obtaining the External memory equipment of access, the file directory list of reading this External memory equipment according to the file system format of access External memory equipment is the discernible file control table of target file system by the file directory list mapping of External memory equipment;
Step S107, switch process: the form identified or the compatible format that according to mapping relations, the file of External memory equipment, file directory list are invented to destination host.
As shown in Figure 2, in a preferred embodiment, the filesystem conversion access method of the present embodiment also comprises: step S109, read step: if receive the access instruction of destination host, obtain the file of the pre-access of destination host, directory name, obtain the file directory list of External memory equipment according to file control table, thereby according to the file of pre-access, directory name reads corresponding to the corresponding data in External memory equipment, and return to driving, convert the corresponding data in External memory equipment to the form identified of destination host or the data of compatible format or file and send to destination host.
As shown in Figure 3, in the present embodiment, further, step S105 mapping relations establishment step further comprises the steps:
Step S301: node table obtaining step: the node table that obtains the file system of access External memory equipment;
Step S303: file allocation table generates step: according to the transformational relation of the target file system of the file system of External memory equipment and destination host, node table is changed to the file allocation table of generating object file system;
Step S305: file access control table generates step: obtain the file directory list of External memory equipment, file directory list is converted to the file access control table of target file system form or compatible format;
Step S307: physical file address mapping table establishment step: set up the physical file address mapping table being linked with the physical address of External memory equipment. The physical address of External memory equipment is pointed in address in physical file address mapping table.
In the present embodiment, the corresponding setting of fileinfo of the address information of physical file address mapping table and file access control table.
As shown in Figure 3, further, in the present embodiment, step S109, read step also comprises: if receive the access instruction of destination host, obtain file, the directory name of the pre-access of destination host, obtain the address of file of pre-access to conduct interviews by physical file address mapping table.
In one embodiment of the invention, adopt EXT3 and the FAT32 of linux to be converted to example, be specifically described. Wherein External memory equipment adopts linux system, and destination host adopts windows system to describe.
The access method of preset different file in filesystem conversion access means 100 of the present invention, first determine the information of the file system of External memory equipment and the file system of destination host, if judge, the file system of External memory equipment is different with the file system of destination host, the converting system corresponding according to different file system calls, completes conversion.
As shown in Figure 4, the transfer process of the filesystem conversion access method of one embodiment of the invention comprises the steps:
Step S501, obtains " the I node table " of EXT3 file system in External memory equipment;
Step S503, according to the conversion corresponding relation of EXT3 and FAT32, by corresponding to " I node table " the FAT32 table that generates;
Step S505, the file directory list of obtaining External memory equipment;
Step S507, converts the file directory list of External memory equipment in the file access control table of FAT32 form;
Step S509, sets up and the physical file address mapping table of the corresponding setting of information of file access control table, according to mapping relations by the physical address of the address sensing External memory equipment in physical file address mapping table.
Further, in the present embodiment, be connected with destination host for convenient, destination host is linked in filesystem conversion access means of the present invention by USB device controller. External memory equipment can and be linked in filesystem conversion access means of the present invention by hard-disk interface mouth for hard disk.
As shown in Figure 5, the filesystem conversion access means 100 of one embodiment of the invention, comprising: acquisition of information module 22, the identical judge module 24 of system.
Acquisition of information module 22: obtain the file system of the External memory equipment of access, obtain the target file system of the destination host of access.
The identical judge module 24 of system: judge that whether the file system of External memory equipment is identical with target file system.
Judge that the file system of External memory equipment is not identical with target file system if the identical judge module 24 of system is judged as NO, the filesystem conversion access means 100 of the present embodiment also comprises: mapping relations are set up module 26, modular converter 28.
Mapping relations are set up module 26: the file directory list of obtaining the External memory equipment of access, the file directory list of reading this External memory equipment according to the file system format of access External memory equipment is the discernible file control table of target file system by the file directory list mapping of External memory equipment.
Modular converter 28: the form identified or the compatible format that according to mapping relations, the file of External memory equipment, file directory list are invented to destination host 92.
As shown in Figure 6, in a preferred embodiment, the filesystem conversion access means 100 of the present embodiment also comprises: read module 40. Read module 40: if receive the access instruction of destination host, obtain file, the directory name of the pre-access of destination host, obtain the file directory list of External memory equipment according to file control table, thereby read corresponding to the corresponding data in External memory equipment according to the file of pre-access, directory name, and returning to driving, the form identified or the compatible format that the corresponding data in External memory equipment are converted to destination host send to destination host.
As shown in Figure 7, further, mapping relations are set up module 26 and are also comprised: node table acquisition module 260, file allocation table generation module 262, file access control table generation module 264, physical file address mapping table are set up module 266.
Node table acquisition module 260: the node table that obtains the file system of access External memory equipment.
File allocation table generation module 262: according to the transformational relation of the target file system of the file system of External memory equipment and destination host, node table is changed to the file allocation table of generating object file system.
File access control table generation module 264: obtain the file directory list of External memory equipment, file directory list is converted to the file access control table of target file system form or compatible format.
Physical file address mapping table is set up module 266: set up the physical file address mapping table being linked with the physical address of External memory equipment. The physical address of External memory equipment is pointed in address in physical file address mapping table.
The corresponding setting of fileinfo of the address information of physical file address mapping table and file access control table.
In preferred embodiment, read module 40 also comprises: if receive the access instruction of destination host, obtain file, the directory name of the pre-access of destination host, obtain the physical address corresponding to External memory equipment of file of pre-access by physical file address mapping table according to file access control table to conduct interviews.
Destination host 92 is linked in the filesystem conversion access means 100 of the present embodiment by USB device controller 94. External memory equipment can be hard disk 90. Hard disk 90 is linked in the filesystem conversion access means 100 of the present embodiment by hard-disk interface 96.
The present invention is by providing filesystem conversion access means 100, exempt the software of installing for accessing compatible file system on computers, non-compatible file system access support programs needn't be installed, can directly complete the access to non-compatible file system in External memory equipment by filesystem conversion access means 100, not only convenience file access, the security that more can greatly improve system access.
While using filesystem conversion access means 100 of the present invention to carry out filesystem conversion, first by External memory equipment as hard disk by corresponding interface as in hard-disk interface incoming file system conversion access means 100. Filesystem conversion access means 100 is accessed to destination host by USB simultaneously; Filesystem conversion access means 100 is switched on; Filesystem conversion access means 100 read External memory equipment as hard disk confirm External memory equipment as hard disk effectively after, filesystem conversion access means 100 read External memory equipment as the file directory list in hard disk according to External memory equipment as Hard disk file system form. File, file directory list that filesystem conversion access means 100 reads invent destination host compatible format.
In the time of destination host access respective file, file directory, according to file directory list and file access control table mapping relations, filesystem conversion access means 100 reads file, the directory name of access in advance corresponding to the corresponding data of External memory equipment, and return to the data or the file that convert destination host compatible format to, drive and send to destination host to read.
By filesystem conversion access means 100, can exempt the software that different file calling on compatibility is installed in destination host, thereby reduce the complexity of destination host, improve the security reliability of system.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention. It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention. Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (6)
1. a filesystem conversion access method, is characterized in that, comprising:
Acquisition of information step: obtain the file system of the External memory equipment of access, obtain the target file system of the destination host of access;
The identical determining step of system: judge that whether file system is identical with target file system;
If judge no, carry out
Mapping relations establishment step: the file directory list of obtaining the External memory equipment of access, the file directory list of reading this External memory equipment according to the file system format of access External memory equipment is the discernible file control table of target file system by the file directory list mapping of External memory equipment;
Switch process: the form identified or the compatible format that according to mapping relations, the file of External memory equipment, file directory list are invented to destination host;
Described mapping relations establishment step also comprises:
Node table obtaining step: obtain the node table of the file system of access External memory equipment,
File allocation table generates step: according to the transformational relation of the target file system of the file system of External memory equipment and destination host, node table is changed to the file allocation table of generating object file system;
File access control table generates step: obtain the file directory list of External memory equipment, file directory list is converted to the file access control table of target file system form or compatible format;
Physical file address mapping table establishment step: set up the physical file address mapping table being linked with the physical address of External memory equipment, the physical address of External memory equipment is pointed in the address in described physical file address mapping table;
The corresponding setting of fileinfo of the address information of described physical file address mapping table and described file access control table.
2. filesystem conversion access method according to claim 1, is characterized in that: also comprise:
Read step: if receive the access instruction of destination host, obtain file, the directory name of the pre-access of destination host, obtain the file directory list of External memory equipment according to file control table, thereby read corresponding to the corresponding data in External memory equipment according to the file of pre-access, directory name, and returning to driving, the form identified or the compatible format that the corresponding data in External memory equipment are converted to destination host send to destination host.
3. filesystem conversion access method according to claim 2, it is characterized in that: described read step also comprises: if receive the access instruction of destination host, obtain file, the directory name of the pre-access of destination host, obtain the address of file of pre-access by physical file address mapping table to conduct interviews; Described destination host accesses by USB device controller; Described External memory equipment is hard disk and accesses by hard-disk interface.
4. a filesystem conversion access means, is characterized in that, comprising:
Acquisition of information module: obtain the file system of the External memory equipment of access, obtain the target file system of the destination host of access;
The identical judge module of system: judge that whether file system is identical with target file system,
If the identical judge module of system is judged as NO,
Described filesystem conversion access means also comprises:
Mapping relations are set up module: the file directory list of obtaining the External memory equipment of access, the file directory list of reading this External memory equipment according to the file system format of access External memory equipment is the discernible file control table of target file system by the file directory list mapping of External memory equipment;
Modular converter: the form identified or the compatible format that according to mapping relations, the file of External memory equipment, file directory list are invented to destination host;
Described mapping relations are set up module and are also comprised:
Node table acquisition module: obtain the node table of the file system of access External memory equipment,
File allocation table generation module: according to the transformational relation of the target file system of the file system of External memory equipment and destination host, node table is changed to the file allocation table of generating object file system;
File access control table generation module: obtain the file directory list of External memory equipment, file directory list is converted to the file access control table of target file system form or compatible format;
Physical file address mapping table is set up module: set up the physical file address mapping table being linked with the physical address of External memory equipment, the physical address of External memory equipment is pointed in the address in described physical file address mapping table;
The corresponding setting of fileinfo of the address information of described physical file address mapping table and file access control table.
5. filesystem conversion access means according to claim 4, is characterized in that: also comprise:
Read module: if receive the access instruction of destination host, obtain file, the directory name of the pre-access of destination host, obtain the file directory list of External memory equipment according to file control table, thereby read corresponding to the corresponding data in External memory equipment according to the file of pre-access, directory name, and returning to driving, the form identified or the compatible format that the corresponding data in External memory equipment are converted to destination host send to destination host.
6. filesystem conversion access means according to claim 5, it is characterized in that: described read module also comprises: if receive the access instruction of destination host, obtain file, the directory name of the pre-access of destination host, obtain the physical address corresponding to External memory equipment of file of pre-access by physical file address mapping table according to file access control table to conduct interviews; Described destination host accesses by USB device controller; Described External memory equipment is hard disk and accesses by hard-disk interface.
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| CN104615754B (en) * | 2015-02-13 | 2018-06-19 | 福州瑞芯微电子股份有限公司 | Data interactive method |
| CN104639553B (en) * | 2015-02-13 | 2018-03-27 | 福州瑞芯微电子股份有限公司 | Data interactive method, apparatus and system |
| CN104615385B (en) * | 2015-02-13 | 2017-12-19 | 福州瑞芯微电子股份有限公司 | A kind of data interactive method |
| CN106709014B (en) * | 2016-12-26 | 2020-08-25 | 华为技术有限公司 | File system conversion method and device |
| US10565162B2 (en) * | 2017-08-02 | 2020-02-18 | Mastercard International Incorporated | Systems and methods for customized operating system conversion |
| CN107679023A (en) * | 2017-09-27 | 2018-02-09 | 武汉颂大教育科技股份有限公司 | A kind of highly compatible electronic document conversion method combined using a variety of switch technologies |
| CN111428272B (en) * | 2020-04-21 | 2023-06-06 | 深圳融安网络科技有限公司 | Secure access method and device for mobile storage device and storage medium |
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| US6907494B2 (en) * | 2002-10-10 | 2005-06-14 | International Business Machines Corporation | Method and system of managing virtualized physical memory in a memory controller and processor system |
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