CN104199750B - A kind of file access pattern method and device of Linux system - Google Patents
A kind of file access pattern method and device of Linux system Download PDFInfo
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- CN104199750B CN104199750B CN201410425645.XA CN201410425645A CN104199750B CN 104199750 B CN104199750 B CN 104199750B CN 201410425645 A CN201410425645 A CN 201410425645A CN 104199750 B CN104199750 B CN 104199750B
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Abstract
The invention discloses a kind of file access pattern method and device of Linux system, to the Ext4 files for recovering to be deleted with rm on linux servers by mistake, it is to avoid lose server significant data and bring about great losses.Methods described, including：It was found that the file data of Ext4 file system is deleted by mistake, the disk partition file data deleted by mistake where is recorded as disk partition to be restored；It is switched under the root of Linux system；The position of disk partition to be restored is searched in directory tree, positional information is obtained；According to positional information, disk partition to be restored is unloaded；By checking that inode values confirm to be currently under the root of Linux system；Download and disk traversal instrument is installed；Disk partition to be restored is traveled through, the listed files of all inode information failures is obtained, finds the file data deleted by mistake；The corresponding inode information of the file data deleted by mistake is revised as effectively.
Description
Technical field
The present invention relates to field of computer technology, a kind of file access pattern method and device of Linux system is especially related to.
Background technology
Linux be it is a set of it is free using and Free propagation class Unix (You Nisi) operating system, be a multi-user, many
Task, the operating system for supporting multithreading and multi -CPU.It supports 32 and 64 hardware.Linux inherit Unix using network as
The design philosophy of core, is the stable multiple-user network operating system of a performance.
Linux basic thought has at 2 points：First, all are all files；Second, each software has the purposes of determination.
Wherein first is exactly particularly that all in system are attributed to a file, including order, hardware and software equipment, behaviour
Make system, process etc. for operating system nucleus, be considered as possessing the file of respective characteristic or type.
Linux file system has Ext 2, Ext 3,4 three kinds of Ext.Wherein, Ext4 (The fourth extended
File system, the 4th extension file system) be a kind of extension Journal File System for the systems of Ext 3, be exclusively for
The fourth edition of the original extension file system (ext or extfs) of Linux exploitations.
In Linux file system, file is carried out only by inode (a kind of data structure includes documentary all information)
One mark.Each file is made up of inode and block (block), and inode is the most basic unit of file system composition, and it is preserved
The base attribute (size, authority, owner's group etc.) of file and the positional information of storage.And block is used for data storage.It is similar
Key-value (clue-value) storage system, inode is exactly key, block correspondence value, searches key by key corresponding
value.A kind of dictionary of similar python (explanation type, object-oriented, the high-level programming language of dynamic data type).,
The software deleted in Linux server by graphic interface can typically recover in recycle bin, and pass through order line
It is difficult to recover that the data deleted are ordered with " rm-rf* ".The disk of Ext2 file formats can generally pass through " debugfs instruments "
To recover, the data in magnetic disk of Ext3 file formats can be recovered by " ext3rescue instruments ", but because Ext4 forms
Disk structure, it is impossible to which the recovery instrument before directly using, the recovery for recovering Ext4 format disc data at present is extremely difficult.
The content of the invention
The present invention provides a kind of file access pattern method and device of Linux system, to recover to use on linux servers
The Ext4 files that rm is deleted by mistake, it is to avoid lose server significant data and bring about great losses.
The present invention provides a kind of file access pattern method of Linux system, for Ext4 file system, including：
It was found that the file data of Ext4 file system is deleted, by the disk partition file data deleted by mistake where by mistake
It is recorded as disk partition to be restored；
It is switched under the root of Linux system；
The position of the disk partition to be restored is searched in the directory tree of Linux system, positional information is obtained；
According to the positional information, the disk partition to be restored is unloaded；
By checking that inode values confirm to be currently under the root of Linux system；
Download and disk traversal instrument is installed；
Instrument is traveled through by the disk and travels through the disk partition to be restored, the text of all inode information failures is obtained
Part list, the file data deleted by mistake is found according to the listed files；
The corresponding inode information of the file data deleted by mistake is revised as effectively.
It is preferred that, in above-mentioned method, it has been revised as by the corresponding inode information of the file data deleted by mistake
After the step of effect, in addition to：
The file deleted by mistake is verified by the instrument for calculating and verifying file message digest, checked whether
It is successfully recovered.
It is preferred that, in above-mentioned method, the instrument of calculating and verification the file message digest is ordered for " md5sum ".
It is preferred that, it is described by checking that inode values confirm to be currently at the root of Linux system in above-mentioned method
Under step in, if the inode values be 2, confirmation be currently under the root of Linux system.
The present invention also provides a kind of file restoring device of Linux system, for Ext4 file system, including：
Recording unit, is used for：It was found that the file data of Ext4 file system is deleted, by the file data deleted by mistake by mistake
The disk partition at place is recorded as disk partition to be restored；
Switch unit, is used for：It is switched under the root of Linux system；
Positional information unit, is used for：The position of the disk partition to be restored is searched in the directory tree of Linux system,
Obtain positional information；
Unloading unit, is used for：According to the positional information, the disk partition to be restored is unloaded；
Confirmation unit, is used for：By checking that inode values confirm to be currently under the root of Linux system；
Installation unit, is used for：Download and disk traversal instrument is installed；
Traversal Unit, is used for：Instrument is traveled through by the disk and travels through the disk partition to be restored, is owned
The listed files of inode information failure, the file data deleted by mistake is found according to the listed files；
Unit is changed, is used for：The corresponding inode information of the file data deleted by mistake is revised as effectively.
It is preferred that, in above-mentioned device, in addition to：
Verification unit, is used for：The file deleted by mistake is entered by the instrument for calculating and verifying file message digest
Row verification, checks whether and is successfully recovered.
It is preferred that, in above-mentioned device, the instrument of calculating and verification the file message digest is ordered for " md5sum ".
It is preferred that, in above-mentioned device, the confirmation unit specifically for：If the inode values are 2, confirm to work as
Under the preceding root in Linux system.
It is preferred that, in above-mentioned device, the installation unit includes：
Network adapter, for connecting internet；
Search unit, for searching for and downloading the disk traversal instrument on the internet.
It is preferred that, in above-mentioned device, the installation unit also includes：
Memory cell, for prestoring the disk traversal instrument or prestoring under the disk traversal instrument
Set address.
The embodiment of the present invention has following technique effect：
1) in the embodiment of the present invention, after find to delete by mistake, it is switched in time under root, and unload the magnetic to be restored
Disk subregion, so as to prevent that deleting file by mistake is capped, can effectively recover the Ext4 texts deleted by mistake with rm on linux servers
Part, it is to avoid lose server significant data and bring about great losses.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write
Specifically noted structure is realized and obtained in book, claims and accompanying drawing.
Below by drawings and examples, technical scheme is described in further detail.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for specification, the reality with the present invention
Applying example is used to explain the present invention together, is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the flow chart of the file access pattern method of the embodiment of the present invention；
Fig. 2 is the schematic diagram of the file restoring device of the embodiment of the present invention.
Embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that preferred reality described herein
Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
In linux system, the inode values of general " root " catalogue are 2, when a subregion is mounted under a catalogue, this
The inode values of " root " catalogue are 2, the disk partition of loss data is mounted to first/mnt catalogues under, it is to avoid data are capped,
It is not the real file deleted in disk partition that file is deleted under Linux, but by the sector in the inode nodes of file
Pointer is removed, while discharging the corresponding data block of these data, when the data block of release is redistributed by system, those are deleted
The data removed will be capped, so delete after data by mistake, answer the subregion where horse back uninstall file.
Fig. 1 is the flow chart of the file access pattern method of the embodiment of the present invention, as shown in figure 1, a kind of file of Linux system
Restoration methods, for Ext4 file system, it includes：
It was found that the file data of Ext4 file system is deleted, by the disk partition file data deleted by mistake where by mistake
It is recorded as disk partition to be restored；
It is switched under the root of Linux system；
The position of the disk partition to be restored is searched in the directory tree of Linux system, positional information is obtained；
According to the positional information, the disk partition to be restored is unloaded；
By checking that inode values confirm to be currently under the root of Linux system；
Download and disk traversal instrument is installed；
Instrument is traveled through by the disk and travels through the disk partition to be restored, the text of all inode information failures is obtained
Part list, the file data deleted by mistake is found according to the listed files；
The corresponding inode information of the file data deleted by mistake is revised as effectively.
It can be seen that, in the embodiment of the present invention, after find to delete by mistake, it is switched in time under root, and treat extensive described in unloading
Multiple disk partition, so as to prevent that deleting file by mistake is capped, and can effectively recover the Ext4 deleted with rm on linux servers by mistake
File, it is to avoid lose server significant data and bring about great losses.
In one embodiment of the invention, changed by the corresponding inode information of the file data deleted by mistake
After effective step, in addition to：
The file deleted by mistake is verified by the instrument for calculating and verifying file message digest, checked whether
It is successfully recovered.So as to whether the accurate information being successfully recovered.
In one embodiment of the invention, the instrument of calculating and verification the file message digest is ordered for " md5sum "
Order.
In one embodiment of the invention, it is described by checking that inode values confirm to be currently at the root mesh of Linux system
In step under record, if the inode values are 2, confirmation is currently under the root of Linux system.
Fig. 2 is the schematic diagram of the file restoring device of the embodiment of the present invention, as shown in Fig. 2 a kind of file of Linux system
Recovery device, for Ext4 file system, it includes：
Recording unit 201, is used for：It was found that the file data of Ext4 file system is deleted, by the file deleted by mistake by mistake
Disk partition where data is recorded as disk partition to be restored；
Switch unit 202, is used for：It is switched under the root of Linux system；
Positional information unit 203, is used for：The position of the disk partition to be restored is searched in the directory tree of Linux system
Put, obtain positional information；
Unloading unit 204, is used for：According to the positional information, the disk partition to be restored is unloaded；
Confirmation unit 205, is used for：By checking that inode values confirm to be currently under the root of Linux system；
Installation unit 206, is used for：Download and disk traversal instrument is installed；
Traversal Unit 207, is used for：Instrument is traveled through by the disk and travels through the disk partition to be restored, is owned
The listed files of inode information failure, the file data deleted by mistake is found according to the listed files；
Unit 208 is changed, is used for：The corresponding inode information of the file data deleted by mistake is revised as effectively.
In one embodiment of the invention, in addition to：Verification unit, is used for：Plucked by calculating and verifying file message
The instrument wanted is verified to the file deleted by mistake, is checked whether and is successfully recovered.
Wherein, the instrument of calculating and verification the file message digest is ordered for " md5sum ".The confirmation unit is specific
For：If the inode values are 2, confirmation is currently under the root of Linux system.
In one embodiment of the invention, the installation unit includes：
Network adapter, for connecting internet；
Search unit, for searching for and downloading the disk traversal instrument on the internet.Search unit can be with
The plug-in unit of function of search.
The installation unit also includes：Memory cell, for prestoring the disk traversal instrument or prestoring
The disk travels through the download address of instrument.In this way, disk traversal instrument can be prestored, it is straight when using
Connecing installation just can be with.Download location can also be prestored, the process of search is eliminated.
From the foregoing, it will be observed that the embodiment of the present invention has the advantage that：
1) in the embodiment of the present invention, after find to delete by mistake, it is switched in time under root, and unload the magnetic to be restored
Disk subregion, so as to prevent that deleting file by mistake is capped, can effectively recover the Ext4 texts deleted by mistake with rm on linux servers
Part, it is to avoid lose server significant data and bring about great losses.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can be using the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the present invention can be used in one or more computers for wherein including computer usable program code
The shape for the computer program product that usable storage medium is implemented on (including but is not limited to magnetic disk storage and optical memory etc.)
Formula.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product
Figure and/or block diagram are described.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which is produced, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that in meter
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, thus in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
1. a kind of file access pattern method of Linux system, for Ext4 file system, it is characterised in that including：
It was found that the file data of Ext4 file system is deleted by mistake, the disk partition file data deleted by mistake where is recorded
For disk partition to be restored；
It is switched under the root of Linux system；
The position of the disk partition to be restored is searched in the directory tree of Linux system, positional information is obtained；
According to the positional information, the disk partition to be restored is unloaded；
By checking that inode values confirm to be currently under the root of Linux system；
Download and disk traversal instrument is installed；
Instrument is traveled through by the disk and travels through the disk partition to be restored, the file row of all inode information failures are obtained
Table, the file data deleted by mistake is found according to the listed files；
The corresponding inode information of the file data deleted by mistake is revised as effectively.
2. the method as described in claim 1, it is characterised in that by the corresponding inode of the file data deleted by mistake
Information is revised as after effective step, in addition to：
The file deleted by mistake is verified by the instrument for calculating and verifying file message digest, recovery is checked whether
Success.
3. method as claimed in claim 2, it is characterised in that the calculating and verify the instrument of file message digest and be
" md5sum " is ordered.
4. method as claimed in claim 2, it is characterised in that described by checking that inode value confirmations are currently at linux systems
In step under the root of system, if the inode values are 2, confirmation is currently under the root of Linux system.
5. a kind of file restoring device of Linux system, for Ext4 file system, it is characterised in that including：
Recording unit, is used for：It was found that the file data of Ext4 file system is deleted, by the file data deleted by mistake where by mistake
Disk partition be recorded as disk partition to be restored；
Switch unit, is used for：It is switched under the root of Linux system；
Positional information unit, is used for：The position of the disk partition to be restored is searched in the directory tree of Linux system, is obtained
Positional information；
Unloading unit, is used for：According to the positional information, the disk partition to be restored is unloaded；
Confirmation unit, is used for：By checking that inode values confirm to be currently under the root of Linux system；
Installation unit, is used for：Download and disk traversal instrument is installed；
Traversal Unit, is used for：Instrument is traveled through by the disk and travels through the disk partition to be restored, all inode letters are obtained
The listed files of failure is ceased, the file data deleted by mistake is found according to the listed files；
Unit is changed, is used for：The corresponding inode information of the file data deleted by mistake is revised as effectively.
6. device as claimed in claim 5, it is characterised in that also include：
Verification unit, is used for：School is carried out to the file deleted by mistake by the instrument for calculating and verifying file message digest
Test, check whether and be successfully recovered.
7. device as claimed in claim 6, it is characterised in that the calculating and verify the instrument of file message digest and be
" md5sum " is ordered.
8. device as claimed in claim 6, it is characterised in that the confirmation unit specifically for：If the inode values are
2, then confirm to be currently under the root of Linux system.
9. device as claimed in claim 5, it is characterised in that the installation unit includes：
Network adapter, for connecting internet；
Search unit, for searching for and downloading the disk traversal instrument on the internet.
10. device as claimed in claim 9, it is characterised in that the installation unit also includes：
Memory cell, for prestoring disk traversal instrument or prestoring the download of the disk traversal instrument
Location.
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| CN201410425645.XA CN104199750B (en) | 2014-08-26 | 2014-08-26 | A kind of file access pattern method and device of Linux system |
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| CN201410425645.XA CN104199750B (en) | 2014-08-26 | 2014-08-26 | A kind of file access pattern method and device of Linux system |
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| CN104199750B true CN104199750B (en) | 2017-07-28 |
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| CN104850470A (en) * | 2015-05-12 | 2015-08-19 | 浪潮电子信息产业股份有限公司 | Method for fast recovering mis-deleted data under linux system |
| CN105068889B (en) * | 2015-08-03 | 2018-05-25 | 四川效率源信息安全技术股份有限公司 | Recover the method for complete deletion file in Ext3/Ext4 |
| CN105095025B (en) * | 2015-08-28 | 2018-11-02 | 小米科技有限责任公司 | Restore the method and device of deleted document in ext file system |
| CN105204959B (en) * | 2015-08-28 | 2018-11-30 | 小米科技有限责任公司 | Restore the method and device of deleted document in ext file system |
| CN105095026A (en) * | 2015-08-31 | 2015-11-25 | 小米科技有限责任公司 | Superblock repair method and apparatus for EXT file system and intelligent device |
| CN105183586A (en) * | 2015-08-31 | 2015-12-23 | 小米科技有限责任公司 | Method and apparatus for restoring accidentally deleted file in EXT file system and intelligent device |
| CN105701146B (en) * | 2015-12-28 | 2019-07-05 | 小米科技有限责任公司 | The method and apparatus to create directory |
| CN107783776B (en) * | 2016-08-26 | 2021-10-15 | 斑马智行网络(香港)有限公司 | Processing method and device of firmware upgrade package and electronic equipment |
| CN107239521A (en) * | 2017-05-26 | 2017-10-10 | 郑州云海信息技术有限公司 | Recycle bin application process and system on a kind of distributed type assemblies |
| CN107562898A (en) * | 2017-09-07 | 2018-01-09 | 郑州云海信息技术有限公司 | A kind of method that recycle bin is created based on KUX operating systems |
| JP7057382B2 (en) * | 2018-02-08 | 2022-04-19 | 富士フイルム株式会社 | Electronic album device and its operation method and operation program |
| CN110659162B (en) * | 2019-09-27 | 2022-10-25 | 厦门市美亚柏科信息股份有限公司 | Data recovery method, device and system of TPSFS file system and storage medium |
| CN110659254B (en) * | 2019-09-27 | 2022-04-22 | 浪潮电子信息产业股份有限公司 | Deleted file recovery method, device, equipment and readable storage medium |
| CN112052118B (en) * | 2020-08-20 | 2022-08-23 | 厦门市美亚柏科信息股份有限公司 | GlobalFs deleted file recovery method and system |
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