CN106096447A - A kind of document protection method and device - Google Patents
A kind of document protection method and device Download PDFInfo
- Publication number
- CN106096447A CN106096447A CN201610422156.8A CN201610422156A CN106096447A CN 106096447 A CN106096447 A CN 106096447A CN 201610422156 A CN201610422156 A CN 201610422156A CN 106096447 A CN106096447 A CN 106096447A
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- Prior art keywords
- file
- attribute information
- change
- backup
- backup file
- Prior art date
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1448—Management of the data involved in backup or backup restore
Abstract
The embodiment of the invention discloses a kind of document protection method and device, method comprises determining that the attribute information of the file to be protected of storage in file system；Create the backup file corresponding to the attribute information of described file；Whether the attribute information detecting described file is changed；When the attribute information described file being detected occurs change, read the attribute information after change, according to the attribute information after described change, update corresponding backup file.As can be seen here; the attribute information of file to be protected is backed up; so that after this document is deleted; when needing to recover it; according to corresponding backup file; realize file access pattern, solve the inode preserving in JFS in prior art and be capped the problem updating and causing deleted file to be resumed.
Description
Technical field
The present invention relates to data processing field, particularly to a kind of document protection method and device.
Background technology
Existing file system is to be stored separately file attribute and the file content of file mostly.Such as linux file
In system, attribute information inode is for storing each attribute of file, comprising: owner information, authority information, temporal information,
Positional information of flag information, content information and corresponding block etc., wherein, block is for storing the content of file.
In addition, during file in deletion file system, remove the inode of this document, the block of file still suffers from.
Wherein, having the JFS of failover capability as more common file system, it disclosure satisfy that use
The demand of deleted file is recovered at family.Concrete, for the JFS with failover capability, delete literary composition
It during part, before the inode of this document is deleted, is first saved in this inode in the log region in JFS, when need
When recovering this deleted file, from this log region, find out the inode of this deleted file, according in inode
Block positional information recovers this deleted file.
But, there is capacity limit the log region in JFS, such as ext3, only 64M space, therefore daily record
The inode preserving in file system is often capped and updates.
Content of the invention
The purpose of the embodiment of the present invention is to provide a kind of document protection method and device, to solve daily record in prior art
The problem that the inode preserving in file system is capped renewal.
For reaching above-mentioned purpose, the embodiment of the invention discloses a kind of document protection method, comprising:
Determine the attribute information of the file to be protected of storage in file system；
Create the backup file corresponding to the attribute information of described file；
Whether the attribute information detecting described file is changed；
When detect described file attribute information occur change when, read change after attribute information, according to described more
Attribute information after changing, updates corresponding backup file.
Optionally, before the backup file corresponding to the described attribute information creating described file, can also include:
Determine the primary importance of the attribute information of the described file of storage；
The described backup file corresponding to attribute information creating described file, may include that
It in the second position being different from described primary importance, is that the attribute information of described file creates corresponding backup
File.
Optionally, whether the attribute information of the described file of described detection is changed, and may include that
Detect whether the modification time in the attribute information of described file is changed, if it is, represent described file
Attribute information is changed.
Optionally, described according to the attribute information after described change, update corresponding backup file, may include that
Attribute information after described change is contrasted with corresponding backup file, determines and described corresponding backup literary composition
The difference content of part；
By in described for the write of described difference content corresponding backup file.
Optionally, described according to the attribute information after described change, update corresponding backup file, may include that
Re-create the backup file corresponding to attribute information after described change.
Optionally, described method can also include:
Determine the backup file of the attribute information of file to be restored；Wherein, described file to be restored is for from described file system
The file protected deleted in system；
According to described backup file, described file to be restored is recovered.
For reaching above-mentioned purpose, the embodiment of the invention also discloses a kind of file protection device, comprising:
First determining module, for determining the attribute information of the file to be protected of storage in file system；
Creation module, for creating the backup file corresponding to attribute information of described file；
Detection module, whether the attribute information for detecting described file is changed；
Read module, when the attribute information for described file being detected when described detection module occurs change, reads more
Attribute information after changing；
More new module, for according to the attribute information after described change, updates corresponding backup file.
Optionally, can also include:
Second determining module, for determining the primary importance of the attribute information storing described file；
Described creation module, specifically may be used for:
It in the second position being different from described primary importance, is that the attribute information of described file creates corresponding backup
File.
Optionally, described detection module, specifically may be used for:
Detect whether the modification time in the attribute information of described file is changed, if it is, represent described file
Attribute information is changed.
Optionally, described more new module, specifically may be used for:
Attribute information after described change is contrasted with corresponding backup file, determines and described corresponding backup literary composition
The difference content of part；
By in described for the write of described difference content corresponding backup file.
Optionally, described more new module, specifically may be used for:
Re-create the backup file corresponding to attribute information after described change.
Optionally, described device can also include:
3rd determining module, for determining the backup file of the attribute information of file to be restored；Wherein, described literary composition to be restored
Part is the file protected deleted from described file system；
Recover module, for according to described backup file, recovering described file to be restored.
As seen from the above technical solution, apply the embodiment of the present invention, determine the file to be protected of storage in file system
Attribute information；Create the backup file corresponding to the attribute information of described file；Whether detect the attribute information of described file
Change；When detect described file attribute information occur change when, read change after attribute information, according to described more
Attribute information after changing, updates corresponding backup file.As can be seen here, the attribute information of file to be protected is backed up,
So that after this document is deleted, when needing to recover it, according to corresponding backup file, it is achieved file access pattern, solve
The inode preserving in JFS in prior art is capped renewal and causes the deleted file to be resumed
Problem.
Certainly, implement arbitrary product of the present invention or method must be not necessarily required to reach all the above excellent simultaneously
Point.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the accompanying drawing of required use is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, all right
Obtain other accompanying drawing according to these accompanying drawings.
The first schematic flow sheet of the document protection method that Fig. 1 provides for the embodiment of the present invention；
The second schematic flow sheet of the document protection method that Fig. 2 provides for the embodiment of the present invention；
The first structural representation of the file protection device that Fig. 3 provides for the embodiment of the present invention；
The second structural representation of the file protection device that Fig. 4 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
In order to solve prior art problem, embodiments provide a kind of document protection method and device, lower kept man of a noblewoman
A kind of document protection method first providing the embodiment of the present invention is described in detail.
The first schematic flow sheet of the document protection method that Fig. 1 provides for the embodiment of the present invention, comprising:
S101: determine the attribute information of the file to be protected of storage in file system.
In order to solve prior art problem, the embodiment of the present invention uses the mode of backup attribute information.Think based on this process
Think, it may be determined that the attribute information of the file to be protected of storage in file system, and then the follow-up genus to file to be protected
Property information carries out back-up processing.Wherein, the attribute information of file is the inode of this document, concrete, and the inode of file can
With including but not limited to: owner information, authority information, temporal information, flag information, content information and corresponding
The positional information of block.
In illustrated embodiment of the present invention, file to be protected can be the All Files of storage in file system, it is possible to
To be the partial document of storage in file system.
It is understood that file to be protected can be specified voluntarily by user, such as: be used for indicating user for user's output
Select the operation interface of file to be protected, and then, user can be selected the file of required protection by this operation interface；Certainly,
File to be protected can determine, for example voluntarily for operating system: uses frequency higher the executable file of application program, user
Document files, the file relating to user privacy information etc. as file to be protected, this is all feasible.
In it is emphasized that the present invention implements, determine the attribute information of the file to be protected of storage in file system
Specific implementation can use of the prior art any one determine mode, do not limit at this.
For example, the system format of file system can (Extended file system extends file system for ext
System) the 2nd, ext4 etc., for the file system of different system form, determine the file to be protected of storage in file system
The mode using during attribute information can be different.Therefore, before determining attribute information, can first determine this document system is
System form, according to the system format determining, determines the attribute information of the file to be protected of storage in this document system.This area
Artisans will appreciate that, determine that the attribute information of the file to be protected of storage in different file is existing skill
Art, therefore not to repeat here.
S102: create the backup file corresponding to the attribute information of described file.
After the attribute information of the file to be protected storing in determining file system, the genus of described file can be created
Property backup file corresponding to information, wherein, the attribute information of described file can have unique correspondence with backup file, also
It is exactly that the corresponding respective backup file of each file, the content in this backup file is the attribute information of corresponding file.
As one embodiment of the present invention, before S102, it may also be determined that store the attribute information of described file
Primary importance, S102 may include that in the second position being different from described primary importance, be described file attribute information
Create corresponding backup file.
During it is understood that attribute information is backed up, can select different from the storage position of this attribute information
Position store the backup file of this attribute information, to avoid when the disk of attribute information storage breaks down, this attribute is believed
The backup file of breath also damages because of disk failure, causes attribute information to recover.
Certainly, backing up file and also can being stored in the identical position of corresponding attribute information, this is not restricted.
S103: whether the attribute information detecting described file is changed, if it is, perform S104.
Wherein, owing to file exists the possibility being modified, and when file is modified, the attribute information of file is also therewith
Change, in order to ensure to back up synchronism and the validity of file, in order to the follow-up deleted file that effectively recovers, therefore,
Whether can change the attribute information of timing or the real-time described file of detection, and perform difference according to different judged results
Operation.Concrete, when the attribute information described file being detected occurs change, show that described file is currently corresponding standby
The file content of part file is no longer equal to the attribute information of this document, therefore, it can perform S104；And it is described when detecting
When the attribute information of file does not occurs change, can not deal with.
Concrete, in one implementation, whether the attribute information detecting described file is changed, and may include that
Detect whether the modification time in the attribute information of described file is changed, if it is, represent the attribute information of described file
Change.
It is understood that attribute information includes the temporal informations such as establishment time and the modification time of file, Ke Yijian
Modification time in the attribute information of control this document, if modification time there occurs change, then it represents that the attribute information of file is sent out
Change.If the attribute information of file there occurs change, then perform S104.
S104: read the attribute information after change, according to the attribute information after change, updates corresponding backup file.
In order to ensure to back up synchronism and the validity of file such that it is able to effectively recover deleted file,
When detecting that the attribute information of described file occurs change, the attribute information after change can be read, according to the attribute after change
Information, updates corresponding backup file.
In a kind of specific implementation, the described attribute information reading after changing, may include that the described file system of determination
The system format of system；According to the system format determining, it is thus achieved that the attribute information after change.
For example, the system format of file system can be ext2, ext4 etc., for the file system of different system form
For system, the mode using when reading the attribute information in file system is different.Therefore, before reading attributes information, need
Determine the system format of the file system storing attribute information to be read, according to the system format determining, it is thus achieved that attribute information.
It will be appreciated by persons skilled in the art that the attribute information reading storage in different file is prior art, at this not
Repeat.
In illustrated embodiment of the present invention, according to the attribute information after change, update corresponding backup file, can use
Following manner:
Attribute information after change is contrasted with corresponding backup file, determines corresponding with described by first kind of way
Backup file difference content；By in described for the write of described difference content corresponding backup file.
Adopt in this way, when attribute information changes, only the difference content changing is write this attribute letter
Ceasing in corresponding backup file, the content of write will not be a lot of every time, and write efficiency is higher.
The second way, re-creates the backup file corresponding to the attribute information after change.
Adopt in this way, when attribute information changes, backup is re-started to attribute information, eliminate and will change
After the corresponding backup process that contrasts of file of attribute information, operate simpler.
When there is change in the attribute information of file, this attribute information that upgrades in time corresponding backup file, ensure that
Backup file and the synchronism of attribute information, when the attribute information of file is deleted, utilize its corresponding backup file to this article
When part recovers, it is possible to increase the accuracy of recovery.
In addition, method file protected compared to existing JFS, when file changes, no
Need, in the file system changing write storage this document that will occur, to simplify operation.
Apply embodiment illustrated in fig. 1 of the present invention, determine the attribute information of the file to be protected of storage in file system；Wound
Build the backup file corresponding to the attribute information of described file；Whether the attribute information detecting described file is changed；Work as inspection
When measuring the attribute information generation change of described file, read the attribute information after change, believe according to the attribute after described change
Breath, updates corresponding backup file.As can be seen here, the attribute information of file to be protected is backed up, in order to by this article
After part is deleted, when needing to recover it, according to corresponding backup file, it is achieved file access pattern, solve in prior art
The inode preserving in JFS is capped the problem updating and causing deleted file to be resumed.
The second schematic flow sheet of the document protection method that Fig. 2 provides for the embodiment of the present invention, real shown in Fig. 2 of the present invention
Execute example on the basis of embodiment illustrated in fig. 1 of the present invention, increase following steps:
S105: determine the backup file of the attribute information of file to be restored.
Wherein, described file to be restored is the file protected deleted from described file system.To be restored
File can be specified voluntarily by user, it is also possible to is determined voluntarily by operating system, and this is all rational.
S106: according to described backup file, described file to be restored is recovered.
It is understood that carry out the file of file protection for the scheme utilizing embodiment illustrated in fig. 1 of the present invention to provide
For, if after deleting this document, when needing to recover it, embodiment illustrated in fig. 2 of the present invention can be used to provide
Scheme.
When deleting the file in file system, the attribute information of this document can be removed.Assume this document system stores
File A based in embodiment illustrated in fig. 1 of the present invention provide document protection method carried out file protection, say, that deposit
Store up the attribute information corresponding backup file of file A.Assume file A to be deleted, now need to recover it:
Then determine the backup file of the attribute information of file A to be restored, utilize this backup file, file A to be restored is entered
Row recovers.
Apply embodiment illustrated in fig. 2 of the present invention, when needs recover deleted file, according to the attribute information of this document
Backup file, be capable of the recovery to this document, solve prior art log region capacity constraint and cause being deleted
The problem that cannot be resumed of file.
Corresponding with above-mentioned embodiment of the method, the embodiment of the present invention also provides a kind of file protection device.
The first structural representation of the file protection device that Fig. 3 provides for the embodiment of the present invention, comprising:
First determining module 301, for determining the attribute information of the file to be protected of storage in file system；
Creation module 302, for creating the backup file corresponding to attribute information of described file；
In illustrated embodiment of the present invention, can also include: the second determining module, for determining the genus storing described file
The primary importance of property information；
Creation module 302, specifically may be used for: in the second position being different from described primary importance, is described file
Attribute information create corresponding backup file.
Detection module 303, whether the attribute information for detecting described file is changed；
In illustrated embodiment of the present invention, detection module 303, specifically may be used for:
Detect whether the modification time in the attribute information of described file is changed, if it is, represent described file
Attribute information is changed.
Read module 304, when the attribute information for described file being detected when detection module 303 occurs change, reads
Attribute information after change；
In illustrated embodiment of the present invention, read module 304, specifically may be used for: determine the system of described file system
Form；
According to the system format determining, it is thus achieved that the attribute information after change.
More new module 305, for according to the attribute information after described change, updates corresponding backup file.
As one embodiment of the present invention, more new module 305, specifically may be used for:
Attribute information after described change is contrasted with corresponding backup file, determines and described corresponding backup literary composition
The difference content of part；By in described for the write of described difference content corresponding backup file.
As another embodiment of the invention, more new module 305, specifically may be used for:
Re-create the backup file corresponding to attribute information after described change.
Apply embodiment illustrated in fig. 3 of the present invention, determine the attribute information of the file to be protected of storage in file system；Wound
Build the backup file corresponding to the attribute information of described file；Whether the attribute information detecting described file is changed；Work as inspection
When measuring the attribute information generation change of described file, read the attribute information after change, believe according to the attribute after described change
Breath, updates corresponding backup file.As can be seen here, the attribute information of file to be protected is backed up, in order to by this article
After part is deleted, when needing to recover it, according to corresponding backup file, it is achieved file access pattern, solve in prior art
The inode preserving in JFS is capped the problem updating and causing deleted file to be resumed.
The second structural representation of the file protection device that Fig. 4 provides for the embodiment of the present invention, real shown in Fig. 4 of the present invention
Execute example on the basis of embodiment illustrated in fig. 3 of the present invention, can also include:
3rd determining module 306, for determining the backup file of the attribute information of file to be restored；Wherein, described treat extensive
Multiple file is the file protected deleted from described file system；
Recover module 307, for according to described backup file, recovering described file to be restored.
Apply embodiment illustrated in fig. 4 of the present invention, when needs recover deleted file, according to the attribute information of this document
Backup file, be capable of the recovery to this document, solve prior art log region capacity constraint and cause being deleted
The problem that cannot be resumed of file.
It should be noted that herein, the relational terms of such as first and second or the like is used merely to a reality
Body or operation separate with another entity or operating space, and deposit between not necessarily requiring or imply these entities or operating
Relation or order in any this reality.And, term " includes ", "comprising" or its any other variant are intended to
Comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include that those are wanted
Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment
Intrinsic key element.In the case of there is no more restriction, the key element being limited by statement " including ... ", it is not excluded that
Including the process of described key element, method, article or equipment there is also other identical element.
Each embodiment in this specification all uses related mode to describe, identical similar portion between each embodiment
Dividing and seeing mutually, what each embodiment stressed is the difference with other embodiments.Real especially for device
For executing example, owing to it is substantially similar to embodiment of the method, so describe is fairly simple, related part sees embodiment of the method
Part illustrate.
One of ordinary skill in the art will appreciate that all or part of step realizing in said method embodiment is can
Completing to instruct related hardware by program, described program can be stored in computer read/write memory medium,
The storage medium obtaining designated herein, such as: ROM/RAM, magnetic disc, CD etc..
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.All
Any modification, equivalent substitution and improvement etc. made within the spirit and principles in the present invention, are all contained in protection scope of the present invention
In.
Claims (12)
1. a document protection method, it is characterised in that include:
Determine the attribute information of the file to be protected of storage in file system；
Create the backup file corresponding to the attribute information of described file；
Whether the attribute information detecting described file is changed；
When the attribute information described file being detected occurs change, read the attribute information after change, after described change
Attribute information, update corresponding backup file.
2. method according to claim 1, it is characterised in that corresponding to the described attribute information creating described file
Before backup file, also include:
Determine the primary importance of the attribute information of the described file of storage；
The described backup file corresponding to attribute information creating described file, comprising:
It in the second position being different from described primary importance, is that the attribute information of described file creates corresponding backup literary composition
Part.
3. method according to claim 1, it is characterised in that whether the attribute information of the described file of described detection occurs more
Change, comprising:
Detect whether the modification time in the attribute information of described file is changed, if it is, represent the attribute of described file
Information is changed.
4. method according to claim 1, it is characterised in that described according to the attribute information after described change, it is right to update
The backup file answered, comprising:
Attribute information after described change is contrasted with corresponding backup file, determines and described corresponding backup file
Difference content；
By in described for the write of described difference content corresponding backup file.
5. method according to claim 1, it is characterised in that described according to the attribute information after described change, it is right to update
The backup file answered, comprising:
Re-create the backup file corresponding to attribute information after described change.
6. the method according to any one of claim 1-5, it is characterised in that also include:
Determine the backup file of the attribute information of file to be restored；Wherein, described file to be restored is for from described file system
The file protected deleted；
According to described backup file, described file to be restored is recovered.
7. a file protection device, it is characterised in that include:
First determining module, for determining the attribute information of the file to be protected of storage in file system；
Creation module, for creating the backup file corresponding to attribute information of described file；
Detection module, whether the attribute information for detecting described file is changed；
Read module, when the attribute information for described file being detected when described detection module occurs change, after reading change
Attribute information；
More new module, for according to the attribute information after described change, updates corresponding backup file.
8. device according to claim 7, it is characterised in that also include:
Second determining module, for determining the primary importance of the attribute information storing described file；
Described creation module, specifically for:
It in the second position being different from described primary importance, is that the attribute information of described file creates corresponding backup literary composition
Part.
9. device according to claim 7, it is characterised in that described detection module, specifically for:
Detect whether the modification time in the attribute information of described file is changed, if it is, represent the attribute of described file
Information is changed.
10. device according to claim 7, it is characterised in that described more new module, specifically for:
Attribute information after described change is contrasted with corresponding backup file, determines and described corresponding backup file
Difference content；
By in described for the write of described difference content corresponding backup file.
11. devices according to claim 7, it is characterised in that described more new module, specifically for:
Re-create the backup file corresponding to attribute information after described change.
12. devices according to any one of claim 7-11, it is characterised in that also include:
3rd determining module, for determining the backup file of the attribute information of file to be restored；Wherein, described file to be restored is
The file protected deleted from described file system；
Recover module, for according to described backup file, recovering described file to be restored.
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| CN201610422156.8A CN106096447A (en) | 2016-06-15 | 2016-06-15 | A kind of document protection method and device |
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