CN102799691A - File system conversion access method and file system conversion access equipment - Google Patents
File system conversion access method and file system conversion access equipment Download PDFInfo
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- CN102799691A CN102799691A CN2012102899573A CN201210289957A CN102799691A CN 102799691 A CN102799691 A CN 102799691A CN 2012102899573 A CN2012102899573 A CN 2012102899573A CN 201210289957 A CN201210289957 A CN 201210289957A CN 102799691 A CN102799691 A CN 102799691A
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Abstract
The invention relates to a file system conversion access method and file system conversion access equipment. The file system conversion access method comprises the following steps of: acquiring a file directory list of accessed external storage equipment; reading the file directory list of the external storage equipment according to a file system format of the accessed external storage equipment; mapping the file directory list of the external storage equipment into a file control table which can be identified by a target file system; and virtualizing files and a file target list of the external storage equipment into a format or a compatible format which can be identified by a target host according to a mapping relation. According to the file system conversion access method and the file system conversion access equipment, software installed for accessing a compatible file system on the target host, i.e. a computer, is avoided through providing the file system conversion access equipment, that is to say, non-compatible file system access supporting software is not needed to be installed, and the access of the non-compatible file system in the external storage equipment can be directly finished through the file system conversion access equipment, which is not only convenient for file access, but also can be used for greatly improving the safety of 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
Because the industry spot reliability requirement can use the high file system format of some reliabilities; Embedded system also can be used the correspondent file system form according to different systems; The file system format that uses between the different operating systems also maybe be compatible.Special in the mobile unit, stop working or device powers down or sudden power state guarantee that data are not destroyed at vehicle like need such as digital video cassette recorders, higher to data storage backup reliability requirement, generally adopt the high file system format of reliability.When reading of data inconvenience will appear like this.
Want to make operating system can visit non-compatible file system, the general method of using has following two kinds: through revising device drives, make operating system as visiting compatible file system, to visit;
Or remove to read each file through specific read-write application software, convert operating system compatible format file then into.
Existing two kinds of technology all need be installed corresponding software and realized on each computing machine that needs to visit, for the 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 visit the incompatibility file system.
Simultaneously, a kind of filesystem conversion access means that can conveniently visit the incompatibility file system is provided.
A kind of filesystem conversion access method comprises the steps:
Information obtaining 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 whether file system is identical with target file system,
Then do not carry out if judge
Mapping relations establishment step: the file directory tabulation of obtaining the External memory equipment of access; The file directory tabulation of reading this External memory equipment according to the file system format that inserts External memory equipment is the discernible file control table of target file system with the file directory maps of External memory equipment;
Switch process: the form discerned or the compatible format that the file of External memory equipment, file destination tabulation are invented destination host according to mapping relations.
In a preferred embodiment; Also comprise: read step: if receive the access instruction of destination host; Obtain destination host file, the directory name of visit in advance, obtain the file directory tabulation of External memory equipment according to file control table, thereby read corresponding to the corresponding data in the External memory equipment according to file, the directory name of preparatory visit; And returning driving, form discerned or compatible format that the corresponding data during storage is provided with converts destination host to send to destination host.
In a preferred embodiment, the said mapping relations step of setting up also comprises:
The node table obtaining step: obtain the node table of the file system that inserts External memory equipment,
File allocation table generates step: according to the transformational relation of file system with the target file system of destination host of External memory equipment, with the file allocation table of node table conversion generation target file system;
The file access control table generates step: obtain the file directory tabulation of External memory equipment, the file directory tabulation is converted to the file access control table of target file system form or compatible format;
Physical file address mapping table establishment step: the physical file address mapping table that the physical address of foundation and External memory equipment is linked, the physical address of the address directed outwards memory device in the said physical file address mapping table.
In a preferred embodiment, the corresponding setting of fileinfo of the address information of said physical file address mapping table and said file access control table.
In a preferred embodiment, said read step also comprises: if receive the access instruction of destination host, obtain destination host file, the directory name of visit in advance, the address of file that obtains preparatory visit through physical file accessed mapping table is to conduct interviews; Said destination host inserts through the USB device controller; Said External memory equipment is hard disk and passes through the hard-disk interface mouth and insert.
A kind of filesystem conversion access means comprises:
Information acquisition 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 whether file system is identical with target file system,
If the identical judge module of system is judged as not, then said file access conversion equipment also comprises:
Mapping relations are set up module: the file directory tabulation of obtaining the External memory equipment of access; The file directory tabulation of reading this External memory equipment according to the file system format that inserts External memory equipment is the discernible file control table of target file system with the file directory maps of External memory equipment;
Modular converter: the form discerned or the compatible format that the file of External memory equipment, file destination tabulation are invented destination host according to mapping relations.
In a preferred embodiment, also comprise:
Read module: if receive the access instruction of destination host; Obtain destination host file, the directory name of visit in advance; Obtain the file directory tabulation of External memory equipment according to file control table; Thereby file, directory name according to preparatory visit read corresponding to the corresponding data in the External memory equipment, and return driving, and form discerned or compatible format that the corresponding data during storage is provided with converts destination host to send to destination host.
In a preferred embodiment, the said mapping relations module of setting up also comprises:
The node table acquisition module: obtain the node table of the file system that inserts External memory equipment,
File allocation table generation module:, the node table conversion is generated the file allocation table of target file system according to the transformational relation of the target file system of the file system of External memory equipment and destination host;
File access control table generation module: obtain the file directory tabulation of External memory equipment, the file directory tabulation is converted to the file access control table of target file system form or compatible format;
The physical file address mapping table is set up module: the physical file address mapping table that the physical address of foundation and External memory equipment is linked, the physical address of the address directed outwards memory device in the said physical file address mapping table.
In a preferred embodiment, the corresponding setting of fileinfo of the address information of said physical file address mapping table and said file access control table.
In a preferred embodiment; Said read module also comprises: if receive the access instruction of destination host; Obtain destination host in advance file, the directory name of visit, obtain through physical file accessed mapping table according to the file access control table preparatory visit file corresponding to the physical address of External memory equipment to conduct interviews; Said destination host inserts through the USB device controller; Said External memory equipment is hard disk and passes through hard-disk interface and insert.
Above-mentioned filesystem conversion access method and filesystem conversion access means; Through the filesystem conversion access means is provided; Release destination host be on the computing machine for visiting compatible file system installed software, non-compatible file system access support programs promptly needn't be installed, can directly accomplish visit through the filesystem conversion access means to non-compatible file system in the External memory equipment; Not only convenience file visit, the security of the visit of raising system more greatly.The target file system of the file system of the External memory equipment of filesystem conversion access means through obtaining access and the destination host of access; Judge whether file system is identical with target file system; If judge different file directory tabulations of then obtaining the External memory equipment of access; The file directory tabulation of reading this External memory equipment according to the file system format that inserts External memory equipment is the discernible file control table of target file system with the file directory maps of External memory equipment; And according to mapping relations the file of External memory equipment, file destination tabulation are invented the form discerned or the compatible format of destination host; Thereby with being the file compatible with incompatible file system of destination host or file conversion in the External memory equipment with destination host; Read to make things convenient for destination host to carry out data; Simultaneously; Be convenient to the high-reliability storage backup of External memory equipment, and conveniently read, and improved the security of system's visit through filesystem conversion access means of the present invention; Owing to can exempt destination host the compatible access software of different file is installed, thereby has also reduced the complexity of destination host, improve the safe reliability of system through filesystem conversion access means of the present invention.
Description of 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 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 synoptic diagram of the filesystem conversion access means of one embodiment of the invention;
Fig. 6 is the functional block diagram synoptic diagram of the filesystem conversion access means of another preferred embodiment of the present invention;
Fig. 7 sets up the functional block diagram synoptic diagram of module for the mapping relations of the filesystem conversion access means of one embodiment of the invention.
Embodiment
As shown in Figure 1, the filesystem conversion access method of one embodiment of the invention comprises the steps:
Step S101, information obtaining 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 whether file system is identical with target file system;
Then do not carry out if judge
Step S105; Mapping relations establishment step: the file directory tabulation of obtaining the External memory equipment of access; The file directory tabulation of reading this External memory equipment according to the file system format that inserts External memory equipment is the discernible file control table of target file system with the file directory maps of External memory equipment;
Step S107, switch process: the form discerned or the compatible format that the file of External memory equipment, file destination tabulation are invented destination host according to mapping relations.
As shown in Figure 2; In a preferred embodiment; The filesystem conversion access method of present embodiment also comprises: step S109, read step: if receive the access instruction of destination host, obtain destination host file, the directory name of visit in advance; Obtain the file directory tabulation of External memory equipment according to file control table; Thereby file, directory name according to preparatory visit read corresponding to the corresponding data in the External memory equipment, and return driving, convert the corresponding data in the External memory equipment form discerned of destination host to or the data or the file of compatible format sends to destination host.
As shown in Figure 3, in the present embodiment, further, step S105 sets up the mapping relations step and further comprises the steps:
Step S301: node table obtaining step: the node table that obtains the file system that inserts External memory equipment;
Step S303: file allocation table generates step: according to the transformational relation of file system with the target file system of destination host of External memory equipment, with the file allocation table of node table conversion generation target file system;
Step S305: the file access control table generates step: obtain the file directory tabulation of External memory equipment, the file directory tabulation 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: the physical file address mapping table that the physical address of foundation and External memory equipment is linked.The physical address of the address directed outwards memory device in the 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 destination host file, the directory name of visit in advance, the address of file that obtains preparatory visit through physical file accessed mapping table is to conduct interviews.
In one embodiment of the invention, adopt EXT3 and the FAT32 of linux to convert example into, specify.Wherein External memory equipment adopts the linux system, and destination host adopts the windows system to describe.
In filesystem conversion access means 100 of the present invention, preset the access method of different file; The information of the file system of at first definite External memory equipment and the file system of destination host; If the file system of judgement External memory equipment is different with the file system of destination host; Then corresponding according to different files system call converting system is accomplished 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 the External memory equipment;
Step S503 is according to the conversion corresponding relation of EXT3 and FAT32, with " I node table " the corresponding FAT32 table that generates;
Step S505, the file directory tabulation of obtaining External memory equipment;
Step S507 converts the file directory tabulation of External memory equipment to the file access control table of FAT32 form;
Step S509 sets up the physical file accessed mapping table with the corresponding setting of the information of file access control table, according to the physical address of mapping relations with the address directed outwards memory device in the physical file accessed mapping table.
Further, in the present embodiment, be connected with destination host for ease, destination host is linked in the filesystem conversion access means of the present invention through the USB device controller.External memory equipment can be linked in the filesystem conversion access means of the present invention for hard disk and through the hard-disk interface mouth.
As shown in Figure 5, the filesystem conversion access means 100 of one embodiment of the invention comprises: information acquisition module 22, the identical judge module 24 of system.
Information acquisition 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 whether the file system of External memory equipment is identical with target file system.
Do not judge promptly that the file system of External memory equipment and target file system are inequality if the identical judge module 24 of system is judged as, then the filesystem conversion access means 100 of present embodiment also comprises: mapping relations are set up module 26, modular converter 28.
Mapping relations are set up module 26: the file directory tabulation of obtaining the External memory equipment of access; The file directory tabulation of reading this External memory equipment according to the file system format that inserts External memory equipment is the discernible file control table of target file system with the file directory maps of External memory equipment.
Modular converter 28: the form discerned or the compatible format that the file of External memory equipment, file destination tabulation are invented destination host 92 according to mapping relations.
As shown in Figure 6, in a preferred embodiment, the filesystem conversion access means 100 of present embodiment also comprises: read module 40.Read module 40: if receive the access instruction of destination host; Obtain destination host file, the directory name of visit in advance; Obtain the file directory tabulation of External memory equipment according to file control table; Thereby file, directory name according to preparatory visit read corresponding to the corresponding data in the External memory equipment, and return driving, and form discerned or compatible format that the corresponding data during storage is provided with converts destination host to send to destination host.
As shown in Figure 7, further, set up mapping relations module 26 and also comprise: 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 that inserts External memory equipment.
File allocation table generation module 262:, the node table conversion is generated the file allocation table of target file system according to the transformational relation of the target file system of the file system of External memory equipment and destination host.
File access control table generation module 264: obtain the file directory tabulation of External memory equipment, the file directory tabulation is converted to the file access control table of target file system form or compatible format.
The physical file address mapping table is set up module 266: the physical file address mapping table that the physical address of foundation and External memory equipment is linked.The physical address of the address directed outwards memory device in the 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 the preferred embodiment; Read module 40 also comprises: if receive the access instruction of destination host; Obtain destination host in advance file, the directory name of visit, obtain through physical file accessed mapping table according to the file access control table preparatory visit file corresponding to the physical address of External memory equipment to conduct interviews.
The present invention is through providing filesystem conversion access means 100; Exempt on computers for visiting compatible file system installed software; Non-compatible file system access support programs promptly needn't be installed; Can directly accomplish visit through filesystem conversion access means 100, not only convenience file visit, the security of the visit of raising system more greatly to non-compatible file system in the External memory equipment.
When using filesystem conversion access means 100 of the present invention to carry out filesystem conversion, earlier External memory equipment such as hard disk are changed in the access means 100 through corresponding interface such as hard-disk interface incoming file system.Simultaneously filesystem conversion access means 100 is inserted destination host through USB; With 100 energisings of filesystem conversion access means; Filesystem conversion access means 100 reads External memory equipment such as hard disk confirm that External memory equipment such as hard disk are effectively after, filesystem conversion access means 100 read the file directory tabulation in External memory equipment such as the hard disk according to External memory equipment such as fixed disk file system format.The file that filesystem conversion access means 100 reads, file directory tabulation invent the destination host compatible format.
When destination host visit respective file, file directory; According to file directory tabulation and file access control table mapping relations; The file that filesystem conversion access means 100 will be visited in advance, directory name read corresponding to the corresponding data of External memory equipment; And return data or the file that converts the destination host compatible format to, driving sends to destination host and reads.
Through filesystem conversion access means 100, can exempt the software that the compatible visit of different file is installed in destination host, thereby reduce the complexity of destination host, improve the safe reliability of system.
The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, 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 accompanying claims.
Claims (10)
1. a filesystem conversion access method is characterized in that, comprising:
Information obtaining 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 whether file system is identical with target file system;
Then do not carry out if judge
Mapping relations establishment step: the file directory tabulation of obtaining the External memory equipment of access; The file directory tabulation of reading this External memory equipment according to the file system format that inserts External memory equipment is the discernible file control table of target file system with the file directory maps of External memory equipment;
Switch process: the form discerned or the compatible format that the file of External memory equipment, file destination tabulation are invented destination host according to mapping relations.
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 destination host file, the directory name of visit in advance; Obtain the file directory tabulation of External memory equipment according to file control table; Thereby file, directory name according to preparatory visit read corresponding to the corresponding data in the External memory equipment, and return driving, and form discerned or compatible format that the corresponding data during storage is provided with converts destination host to send to destination host.
3. filesystem conversion access method according to claim 2 is characterized in that: the said mapping relations step of setting up also comprises:
The node table obtaining step: obtain the node table of the file system that inserts External memory equipment,
File allocation table generates step: according to the transformational relation of file system with the target file system of destination host of External memory equipment, with the file allocation table of node table conversion generation target file system;
The file access control table generates step: obtain the file directory tabulation of External memory equipment, the file directory tabulation is converted to the file access control table of target file system form or compatible format;
Physical file address mapping table establishment step: the physical file address mapping table that the physical address of foundation and External memory equipment is linked, the physical address of the address directed outwards memory device in the said physical file address mapping table.
4. filesystem conversion access method according to claim 3 is characterized in that: the corresponding setting of fileinfo of the address information of said physical file address mapping table and said file access control table.
5. filesystem conversion access method according to claim 4; It is characterized in that: said read step also comprises: if receive the access instruction of destination host; Obtain destination host in advance file, the directory name of visit, the address of file that obtains preparatory visit through physical file accessed mapping table is to conduct interviews; Said destination host inserts through the USB device controller; Said External memory equipment is hard disk and passes through the hard-disk interface mouth and insert.
6. a filesystem conversion access means is characterized in that, comprising:
Information acquisition 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 whether file system is identical with target file system,
If the identical judge module of system is judged as not,
Then said file access conversion equipment also comprises:
Mapping relations are set up module: the file directory tabulation of obtaining the External memory equipment of access; The file directory tabulation of reading this External memory equipment according to the file system format that inserts External memory equipment is the discernible file control table of target file system with the file directory maps of External memory equipment;
Modular converter: the form discerned or the compatible format that the file of External memory equipment, file destination tabulation are invented destination host according to mapping relations.
7. filesystem conversion access means according to claim 6 is characterized in that: also comprise:
Read module: if receive the access instruction of destination host; Obtain destination host file, the directory name of visit in advance; Obtain the file directory tabulation of External memory equipment according to file control table; Thereby file, directory name according to preparatory visit read corresponding to the corresponding data in the External memory equipment, and return driving, and form discerned or compatible format that the corresponding data during storage is provided with converts destination host to send to destination host.
8. filesystem conversion access means according to claim 7 is characterized in that:
The said mapping relations module of setting up also comprises:
The node table acquisition module: obtain the node table of the file system that inserts External memory equipment,
File allocation table generation module:, the node table conversion is generated the file allocation table of target file system according to the transformational relation of the target file system of the file system of External memory equipment and destination host;
File access control table generation module: obtain the file directory tabulation of External memory equipment, the file directory tabulation is converted to the file access control table of target file system form or compatible format;
The physical file address mapping table is set up module: the physical file address mapping table that the physical address of foundation and External memory equipment is linked, the physical address of the address directed outwards memory device in the said physical file address mapping table.
9. filesystem conversion access means according to claim 8 is characterized in that: the corresponding setting of fileinfo of the address information of said physical file address mapping table and said file access control table.
10. filesystem conversion access means according to claim 9; It is characterized in that: said read module also comprises: if receive the access instruction of destination host; Obtain destination host in advance file, the directory name of visit, obtain through physical file accessed mapping table according to the file access control table preparatory visit file corresponding to the physical address of External memory equipment to conduct interviews; Said destination host inserts through the USB device controller; Said External memory equipment is hard disk and passes through hard-disk interface and insert.
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| CN112506918A (en) * | 2020-11-03 | 2021-03-16 | 深圳市宏电技术股份有限公司 | Data access method, terminal and computer readable storage medium |
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| CN111428272A (en) * | 2020-04-21 | 2020-07-17 | 深圳融安网络科技有限公司 | Secure access method and device of mobile storage device and storage medium |
| 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 |
| CN112506918A (en) * | 2020-11-03 | 2021-03-16 | 深圳市宏电技术股份有限公司 | Data access method, terminal and computer readable storage medium |
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