CN1790328B - Extensible file system - Google Patents
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- CN1790328B CN1790328B CN 200510125054 CN200510125054A CN1790328B CN 1790328 B CN1790328 B CN 1790328B CN 200510125054 CN200510125054 CN 200510125054 CN 200510125054 A CN200510125054 A CN 200510125054A CN 1790328 B CN1790328 B CN 1790328B
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Abstract
An extensible file system format for portable storage media is provided. The extensible file system format includes the specification of primary and secondary directory entry types that may be custom defined. The primary and secondary directory entry types can be further classified as critical and benign directory entries.
Description
The cross reference of related application
The application requires in the United States Patent (USP) provisional application the 60/637th of the FILE SYSTEM FORMAT FORPORTABLE MEDIA by name (file system format that is used for portable medium) of submission on Dec 17th, 2004; No. 407 right of priority; The United States Patent (USP) provisional application is included in this 60/637th, No. 407 by reference.
Background technology
Generally speaking, there are numerous portable computing devices, such as digital camera, DV, media player, mobile phone, mobile computing device, personal digital assistant etc., their service datas on such as storage mediums such as portable storage medias.The sustainable development of the more complicated portable computing device and the portable storage media of large storage capacity more is to the higher requirement of dirigibility proposition of the file system format that on storage medium, uses.Can enough dirigibility this respects be provided for storage size capacity and/or the medium application program that increases, the present file system format method imperfection that may become.
Summary of the invention
The extensible file system that is used for portable storage media form is provided.This extensible file system form comprises the standard of the firsts and seconds directory entry type that can be made by oneself the free burial ground for the destitute definition.Firsts and seconds directory entry type can further be divided into crucial and optimum directory entry.
According to an aspect of the present invention, but a kind of computer-readable medium that is useful on storage data computing machine executive module that contains is provided.This computer-readable components can comprise the boot parameter assembly that is used to file system appointment boot parameter.This computer-readable components also comprises the file allocation table assembly that is used to define the file allocation table that is associated with file system.In addition, this computer-readable components comprises the first class catalogue item assembly of the data that are used for specifying file system root directory.In addition, computer-readable components comprises at least one the second-level directory item assembly corresponding to first class catalogue item assembly.Second-level directory item component definition the metadata that is associated with first class catalogue item assembly.Firsts and seconds directory entry assembly can further be divided into key or optimum.
According to a further aspect in the invention, but provide and contained the computer-readable medium that is useful on storage data computing machine executive module.This computer-readable components comprises the boot parameter assembly that is used to file system appointment boot parameter.This computer-readable components also comprises the file allocation table assembly that is used to define the file allocation table that is associated with file system.In addition, this computer-readable components comprises the root directory assembly of the data that are used for specifying file system root directory.In addition, this computer-readable components comprises at least one the extensible meta-data assembly corresponding to root directory item assembly.Metadata component has defined the metadata that is associated with root directory item assembly.
In illustrative example, file system can not be Unidentified one-level or root directory item installation volume.File system can be ignored Unidentified optimum first class catalogue item, crucial second-level directory item and optimum second-level directory item.
Provide this general introduction to come to have introduced the one group of notion that further describes in the embodiment hereinafter with the form of simplifying.This general introduction is not intended to identify the key feature of the protection theme that requires, and is not intended to be used to assist to confirm the scope of theme required for protection yet.
Description of drawings
When combining accompanying drawing, through the detailed description with reference to hereinafter, aforementioned aspect of the present invention and numerous attendant advantages will be more readily understood and understand better, in the accompanying drawing:
Figure 1A-1C illustrates according to each side of the present invention, comprises the block diagram of the Illustrative environment of the portable computing device of realizing the extensible file system form and memory device;
Fig. 2 illustrates according to each side of the present invention, corresponding to the block diagram of the various volume layout assemblies of extensible file system form;
Fig. 3 illustrates according to each side of the present invention, comprises the block diagram of the extensible file system bibliographic structure of firsts and seconds directory entry structure;
Fig. 4 illustrates according to each side of the present invention, is used for realizing the block diagram of data package of the boot process piece of extensible file system form;
Fig. 5 illustrates according to each side of the present invention, is used for realizing the block diagram of data package of the directory entry of extensible file system form;
Fig. 6 illustrates according to each side of the present invention, is used for realizing the block diagram of data package of filename and the extension name of extensible file system form;
Fig. 7 illustrates according to each side of the present invention, is used for realizing the block diagram of data package of the volume identifier of extensible file system form;
Fig. 8 illustrates according to each side of the present invention, is used for realizing the block diagram of data package of the directory entry expanded of extensible file system form;
Fig. 9 illustrates according to each side of the present invention, is used for realizing the block diagram of data package of the directory entry expanded of extensible file system form;
Figure 10 illustrates according to each side of the present invention, is used for realizing the block diagram of data package of the ACL of extensible file system form; And
Figure 11 illustrates according to each side of the present invention, and the filename of extensible file system form is created the process flow diagram of routine.
Embodiment
Generally speaking, the various processes that the present invention relates to the extensible file system form and be associated with the extensible file system form.In an illustrative example, the extensible file system form is corresponding to extensible file system form that is used for portable storage media and the various processes that are associated with extensible file system form on the portable storage media.Although the present invention will describe about the portable storage media file system form, be illustrative in itself yet those skilled in the relevant art are appreciated that the embodiment that is disclosed, and should not be interpreted as restriction.In addition, those skilled in the relevant art are appreciated that the data structure and the data layout that use in the illustrated examples maybe be about the extraneous informations of performance, safety etc.
Figure 1A-1C is the block diagram that the various operating environments 100 of extensible file system form of the present invention are shown.With reference to Figure 1A, in an illustrative example, the extensible file system form is used for storing from such as mobile computing device 102 computing equipments such as grade with such as the data of storage mediums such as portable storage media 104.In an illustrative example, mobile computing device 102 can include but not limited to portable computing device, mobile phone, personal digital assistant, music player, media player corresponding in the various computing equipments any one.Portable storage media can include, but not limited to hard disk drive, flash media, microdrive and other storage medium.In an illustrative example, the extensible file system form on the portable storage media 104 needn't comprise carrying out or the readable software assembly of any kind that utilized by mobile computing device 102 such as operating environment etc.Perhaps, the extensible file system form on the portable storage media 104 can comprise carrying out or the readable software assembly by mobile device 102 uses.
In an illustrative example, mobile computing device 102 can with other computing device communication, be used to collect/exchange the data that will be stored on the portable storage media 104.With reference to Figure 1B, mobile computing device 102 can with another computing equipment 106 and storage medium 108 direct communications.In an illustrative example, direct communication can be corresponding to various wired or wireless communication methods.In an illustrative example, do not require that other storage medium 108 extensible file system form according to the present invention formats.With reference to figure 1C, in a similar fashion, mobile computing device 102 also can connect through network communicates by letter with storage medium 112 with another computing equipment 110.In an illustrative example, network connects and can be connected with wide area network (WAN) corresponding to Local Area Network.
With reference now to Fig. 2,, with the illustrative example volume layout 200 of describing the extensible file system form.Volume layout 200 comprises boot parameter assembly 202, and this assembly comprises the various information of description about the file system parameter of subregion.In an illustrative example, boot parameter assembly 202 can comprise the basic file system parameter and the various error detection information of subregion that is used for carrying out from the subregion of definition code, this definition of program designation.The data structure that is used to define at least a portion boot parameter will be described about Fig. 4 hereinafter.
But volume layout 200 also comprises the spreading parameter assembly by 204 appointments of OEM parameter, this component definition the employed various additional data structure of combination file system.In an illustrative example, but original equipment manufacturer (OEM) can be specified the various extended data structure that can define during fabrication, such as the performance parameter of storage medium.Volume layout 200 can also comprise the file allocation table assembly 206 that defined file and catalogue are distributed.In an illustrative example, each in the file allocation table assembly 206 corresponding to expression distributed bunch, 32 items of unappropriated bunch or disabled bunch.Volume layout 200 also can comprise a series of file data assembly 208A-208X corresponding to the data of storing according to file system format.The various data structures that are used to define a part of file data assembly 208A-208X will define about Fig. 3-10.
Turn to Fig. 3 now, on the one hand, file data assembly 208 can comprise the one or more directory entries according to bibliographic structure 300.In an illustrative example, bibliographic structure 300 is organized into first class catalogue item 302 and second-level directory item 304.Each directory entry in the firsts and seconds item is typed.For example, in an illustrative example, the types value of firsts and seconds directory entry can be corresponding to the scope of 1-255.First class catalogue item 302 is corresponding to the item in the root directory of file system.Second-level directory item 304 is followed first class catalogue Xiang Bingyu first class catalogue item and is associated.The second-level directory item is expanded the metadata that is associated with relevant first class catalogue item.
Continuation is with reference to figure 3, and in an illustrative example, first class catalogue item 302 can further be categorized as crucial first class catalogue item 306 and optimum first class catalogue item 308.Crucial first class catalogue item 306 is potential different form for each directory entry defines.In an illustrative example, be described below, operating environment can not installed the volume corresponding to the extensible file system form with unknown crucial first class catalogue item.The example of known first class catalogue item 306 can comprise assignment bit map, upper case character table, label, encryption key and normal directory entry.Optimum first class catalogue item 308 also defines potential different form for each directory entry, if but specific optimum first class catalogue item when not understood can be ignored by file system.Optimum first class catalogue item 308 can be associated with another bunch that links volume.In addition, optimum first class catalogue item 308 also can be associated with numerous second-level directory items 304.
To be similar to the mode of first class catalogue item 302, second-level directory item 304 also can further be divided into crucial second-level directory item 310 and optimum second-level directory item 312.As stated, crucial second-level directory item 310 is associated with optimum first class catalogue item with optimum second-level directory item 312, and the metadata that is associated with the first class catalogue item of expansion.Crucial second-level directory item 310 can be associated with another bunch that links volume with optimum second-level directory item 312.
For the volume with correspondence is mounted to the extensible file system form, file system realizes installing and licks journey.In an illustrative example, install and lick the version number that journey attempts to check volume.If (for example, this version number is higher) do not understood by version number, this volume is not installed so.In normal catalogue enumeration process, any crucial first class catalogue item that file system is unknown will stop installs volume.Afterwards, the process that starts such as various users such as File Opens will make file system enumeration second-level directory item.If crucial second-level directory item 310 is unknown by file system, will skip whole directory entry so.In addition, if optimum second-level directory item 312 is unknown by file system, will ignore specific unknown optimum second-level directory item so.
With reference now to Fig. 4,, description is illustrated the block diagram of the data package 400 of the boot process piece that is used for realizing boot parameter assembly 202 (Fig. 2).Data package 400 comprises the OEM name assembly 402 of the file system format create name that is used to storage medium.Data package 400 also comprises the size of data descriptor assembly 404 of the various characteristics that are used for specifying the data that are stored in file system.For example, size of data descriptor assembly 404 can be specified the sector number, FAT table side-play amount of byte number, each allocation units of each sector and to the sector count of all data structures.Data package comprises and is used to specify a plurality of existing with FAT marker assemblies 406 with FAT at present on the file system.In an illustrative example, file system can be supported a plurality of FAT, is used for using with some operating system environment.Data package 400 can also comprise the volume identification assembly 408 that is used to identify volume sequence number and/or version number.In addition, data package 400 can comprise the file system type that is used to file system specified file system format.Those skilled in the relevant art are appreciated that data package 400 can comprise the assembly 402-410 that is used to realize the preceding text sign and a plurality of additional/replacement row of other assembly.
Turn to Fig. 5 now, describe the block diagram of the data package 500 that the directory entry that is used for realizing the extensible file system form is shown.Turn to Fig. 6 now, use description to realize the block diagram of the data package 500 of filename and extension name.Data package 500 comprises and is used for specifying whether in use use assembly 502 of particular category item.In an illustrative example, if this directory entry in use, the high position of this data package will be changed to " 1 " so.Data package 500 also comprises the type assignment component 504 that is used to specify directory entry to be associated with normal directory entry.Data package 500 also comprises the second-level directory item assembly 506 that is used to specify a plurality of second-level directory items that are associated with this normal directory entry.Data package 500 also comprises the file attribute assembly 508 that is used to each file system attributes of directory entry appointment.In addition, data package 500 comprises and is used to specify such as creating time stamp, revising the time stamp and the time component 510 of various temporal informations such as information At All Other Times.In addition, data package 500 also comprises the time area assembly 512 in the time stamp appointment time zone that is used to nearest establishment.Those skilled in the relevant art are appreciated that data package 500 can comprise the assembly 502-512 that is used to realize the preceding text sign and a plurality of additional/replacement row of other assembly.
Turn to Fig. 6 now, described the block diagram of the data package 600 that is used to realize filename and extension name.Data package 600 comprises and is used for indicating whether in use use assembly 602 of particular category item.In an illustrative example, if directory entry in use, the high position of this data package will be changed to " 1 " so.Data package 600 also comprises and is used to the type assignment component 604 of specifying directory entry to be associated with file system name.Data package also comprises filename length assembly 606 and filename hash assembly 608.The use of filename hash assembly 608 will be described below.Data package 600 also comprises the filename assembly 610 that is used to specify filename.Those skilled in the relevant art are appreciated that data package 600 can comprise the assembly 602-610 that is used to realize the preceding text sign and a plurality of additional/replacement row of other assembly.In addition, the file name list item can be expanded by the second-level directory item.
With reference now to Fig. 7,, the block diagram of the data package 700 that the volume identifier that is used for realizing the extensible file system form is shown is provided.Data package 700 comprises the use assembly 702 that is used for specifying the particular category item whether using.In an illustrative example, if directory entry in use, the high position of this data package will be changed to " 1 " so.Data package 700 also comprises and is used to the type assignment component 704 of specifying directory entry to be associated with volume identifier.Data package 700 also comprises the second-level directory item assembly 706 that is used to specify a plurality of second-level directory items that are associated with this volume identifier.Data package 700 also comprises volume identifier 708, such as GUID.Those skilled in the relevant art are appreciated that data package 700 can comprise the assembly 702-708 that is used to realize the preceding text sign and a plurality of additional/replacement row of other assembly.In addition, in an illustrative example, the optimum directory entry that data package 700 is ignored corresponding to the file system that can not supported volume identifier.
With reference now to Fig. 8 and 9,, in an illustrative example, can define specific optimum first class catalogue item type 308 and optimum second-level directory item type 312 such as each side such as OEM.As stated, if in specific optimum first class catalogue item type 308 or the optimum second-level directory item 312 any can not discerned or understand to file system, file system can be ignored defined directory entry type so.
With reference to figure 8, description is illustrated the block diagram that is used for to expand the data package 800 of optimum first class catalogue item 308 in the realization of extensible file system form.Data package 800 comprises the use assembly 802 that is used for indicating the particular category item whether using.In an illustrative example, if directory entry in use, the high position of this data package will be changed to " 1 " so.Data package 800 comprises that also being used to specify directory entry is the type assignment component 804 of optimum first class catalogue item.Data package 800 also comprises the second-level directory item assembly 806 that is used to specify a plurality of second-level directory items that are associated with volume identifier.Data package 800 also comprises volume identifier 808, such as GUID.Data package 800 can also comprise additional information 810, such as authorization information and starting cluster.Those skilled in the relevant art are appreciated that data package 800 can comprise the assembly 802-806 that is used to realize the preceding text sign and a plurality of additional/replacement row of other assembly.
With reference to figure 9, description is illustrated the block diagram that is used for realizing the data package 900 of optimum second-level directory item at the extensible file system form.Data package 900 comprises and is used for specifying whether in use use assembly 902 of particular category item.In an illustrative example, if directory entry in use, the high position of this data package will be changed to " 1 " so.Data package 900 comprises that also being used to specify directory entry is the type assignment component 904 of optimum first class catalogue item.Data package 900 also comprises the second-level directory item assembly 906 that is used to specify a plurality of second-level directory items that are associated with volume identifier.Data package 900 also comprises volume identifier 908, such as GUID.Data package 900 can also comprise additional information 910, such as authorization information and starting cluster.Those skilled in the relevant art are appreciated that data package 900 can comprise the assembly 902-906 that is used to realize the preceding text sign and a plurality of additional/replacement row of other assembly.
In an illustrative example, optimum first class catalogue item and/or second-level directory item can be associated with access control list (ACL) information.Figure 10 illustrates the block diagram that is used for realizing at the extensible file system form data package 1000 of ACL.Data package 100 comprises and is used for specifying whether in use use assembly 1002 of particular category item.In an illustrative example, if directory entry in use, the high position of this data package will be changed to " 1 " so.Data package 1000 comprises that also being used to specify directory entry is the type assignment component 1004 of ACL directory entry.Data package 100 also comprises a plurality of ACL fields 1006, such as the ACL mark, point to the pointer of ACL database etc.Those skilled in the relevant art are appreciated that data package 1000 can comprise the assembly 1002-1006 that is used to realize the preceding text sign and a plurality of additional/replacement row of other assembly.
With reference now to Figure 11,, the filename of describing the extensible file system form is created routine 1100.At frame 1102 places, file system obtains to create the request of the directory entry with particular file name.In an illustrative example, this particular file name can be corresponding to naming convention, such as the naming convention of digital camera picture.At frame 1104 places, file system generates the destination name hash.At frame 1106 places, begin iterative loop through checking next directory entry hashed value.The illustrative directory entry type that is used for storage directory item hashed value is described about data package 600 (Fig. 6) hereinbefore.
At decision box 1108 places, test to confirm whether the target hashed value matees current directory item hashed value.If they do not match, routine 1100 is back to frame 1106 (up to checking out all directory entries) so.If at decision box 1108 places, hash value matches, file system is obtained the complete file name of the directory entry that possibly mate so.The illustrative directory entry type that is used for storage directory item complete file name is described about data package 600 (Fig. 6) hereinbefore.At decision box 1112 places, test to confirm whether the file destination name matees the complete file name that possibly mate directory entry.If routine 1100 stops through the report conflict so, and new filename is selected by the demand file system.If the complete file name does not match, routine 1100 will turn back to frame 1106 and continue as all the directory entry inspection hashed values in the file system so.
According to each side of the present invention, can add various extra functions through specifying the particular category type.For example, can flow directory entry through create name and support name stream.In addition, also can come to encrypt on the support disc through using particular encryption algorithm and key change.In addition, the time zone transforms and can be associated with directory entry, automatically current time zone and the time zone of making directory entry are transformed.
Although illustrate and described illustrative example, be appreciated that and carry out various modifications therein and do not deviate from the spirit and scope of the present invention.
Claims (9)
1. equipment with the multiple arrangement that is used to store data, said multiple arrangement comprises:
First device, it is used to file system and specifies boot parameter;
Second device, it is used to define the file allocation table that is associated with said file system;
The 3rd device; It is used for specifying the data of said file system root directory, wherein said the 3rd device also comprise the crucial first class catalogue item assembly that must be understood by said file system and by said file system can uncared-for optimum first class catalogue item assembly during the unknown; And
At least one the 4th device; It is corresponding to said the 3rd device and be used to define the metadata apparatus associated with the said the 3rd, and wherein said at least one the 4th device can cause the said the 3rd to install and the said the 4th install uncared-for crucial second-level directory assembly when further being included in by the unknown of said file system institute.
2. equipment as claimed in claim 1 is characterized in that, said the 4th device also be included in by said file system can uncared-for optimum second-level directory assembly during the unknown.
3. equipment as claimed in claim 1 is characterized in that, comprises two the 4th devices, and they are corresponding to said the 3rd device and be used to define the metadata apparatus associated with the said the 3rd.
4. equipment as claimed in claim 1 is characterized in that, said the 3rd device comprise be used to define in the storage medium bunch the assignment bit map of availability.
5. equipment as claimed in claim 1 is characterized in that, said the 3rd device comprises volume identifier.
6. equipment as claimed in claim 1 is characterized in that, said the 3rd device comprises the filename identifier.
7. equipment as claimed in claim 6 is characterized in that, said filename identifier comprises complete file name and filename hash.
8. equipment as claimed in claim 1 is characterized in that, said at least one the 4th device comprises can expand the second-level directory item.
9. equipment as claimed in claim 1 is characterized in that, also comprises the 5th device, and it is used in reference to customization and makes the quotient data structure.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US63740704P | 2004-12-17 | 2004-12-17 | |
| US60/637,407 | 2004-12-17 | ||
| US11/229,485 US9639554B2 (en) | 2004-12-17 | 2005-09-16 | Extensible file system |
| US11/229,485 | 2005-09-16 |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210063035.0A Division CN102682075B (en) | 2004-12-17 | 2005-11-17 | Extensible file system |
| CN2010101890267A Division CN101853302B (en) | 2004-12-17 | 2005-11-17 | Extensible file system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1790328A CN1790328A (en) | 2006-06-21 |
| CN1790328B true CN1790328B (en) | 2012-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510125054 Active CN1790328B (en) | 2004-12-17 | 2005-11-17 | Extensible file system |
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| CN (1) | CN1790328B (en) |
| ZA (1) | ZA200509273B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9639554B2 (en) | 2004-12-17 | 2017-05-02 | Microsoft Technology Licensing, Llc | Extensible file system |
| US7873596B2 (en) | 2006-05-23 | 2011-01-18 | Microsoft Corporation | Extending cluster allocations in an extensible file system |
| US8606830B2 (en) | 2004-12-17 | 2013-12-10 | Microsoft Corporation | Contiguous file allocation in an extensible file system |
| US8321439B2 (en) | 2004-12-17 | 2012-11-27 | Microsoft Corporation | Quick filename lookup using name hash |
| CN103701821B (en) * | 2013-12-31 | 2017-07-28 | 北京网康科技有限公司 | File type identification method and device |
| CN112181918B (en) * | 2020-09-30 | 2023-03-03 | 上海商米科技集团股份有限公司 | Quick pre-allocation method for video file of camera for embedded system |
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| EP0618540A2 (en) * | 1993-04-01 | 1994-10-05 | Microsoft Corporation | Common name space for long and short filenames |
| CN1266234A (en) * | 1999-03-04 | 2000-09-13 | 英业达股份有限公司 | Method for backup and recovery of long file name in computer |
| US6374265B1 (en) * | 1999-03-29 | 2002-04-16 | Inventec Corp. | Method for backup and recovery of the long filename in computer system |
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2005
- 2005-11-16 ZA ZA200509273A patent/ZA200509273B/en unknown
- 2005-11-17 CN CN 200510125054 patent/CN1790328B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0618540A2 (en) * | 1993-04-01 | 1994-10-05 | Microsoft Corporation | Common name space for long and short filenames |
| CN1266234A (en) * | 1999-03-04 | 2000-09-13 | 英业达股份有限公司 | Method for backup and recovery of long file name in computer |
| US6374265B1 (en) * | 1999-03-29 | 2002-04-16 | Inventec Corp. | Method for backup and recovery of the long filename in computer system |
Also Published As
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| CN1790328A (en) | 2006-06-21 |
| ZA200509273B (en) | 2008-12-31 |
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