CN107229467A - A kind of device mapper partition methods based on android containers - Google Patents
A kind of device mapper partition methods based on android containers Download PDFInfo
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- CN107229467A CN107229467A CN201710326456.0A CN201710326456A CN107229467A CN 107229467 A CN107229467 A CN 107229467A CN 201710326456 A CN201710326456 A CN 201710326456A CN 107229467 A CN107229467 A CN 107229467A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/30—Creation or generation of source code
- G06F8/31—Programming languages or programming paradigms
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/445—Program loading or initiating
- G06F9/44521—Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading
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Abstract
The invention provides a kind of device mapper partition methods based on android containers, comprise the following steps：S1, be operating system nucleus in mnt namespace structures add a linked list head dm_list, the mnt_namespace structures are used to create device mapper, the device mapper newly created are suspended on using mnt_namespace linked list head dm_list as the chained list of head, each mnt namespace have a device mapper chained list.The beneficial effects of the invention are as follows：Because Device Mapper are kernel virtual drives, thus in the absence of different android machines it is incompatible the problem of, improve compatibility.
Description
Technical field
The present invention relates to partition method, more particularly to a kind of device mapper isolation sides based on android containers
Method.
Background technology
With android development, the multisystem scheme based on container is proposed out on android, wherein
Realize process isolation, file system isolation, Network Isolation etc..Android container schemes are to be based on linux kernel（Operation
System kernel）The namespace of offer（NameSpace）With cgroups technologies, isolated on single kernel multiple complete
Whole Virtual Space.
In order to illustrate mechanism below, how the isolation for first saying down file system in the scheme based on single kernel multisystem is
Realize.The isolation of file system is by chroot（Change Root, that is, root referenced during reprogramming execution
Directory location）Realized with mnt namespace, switch the rootfs in a new space by chroot（Root file system）, this
Sample we the bibliographic structure as on single system can be just created in new rootfs.
Device mapper（Device Mapper are to support the general of logical volume management to set in Linux2.6 kernels
Standby mapping mechanism, it provides the kernel frame of a high modularization for realization for the Block Device Driver of SRM
Structure）It is the virtual of linux block equipment, is highly suitable for integrated a variety of functions on the basis of block device.Device Mapper can
To realize a variety of functions such as soft raid, soft encryption, logical volume band, multipath, mirror image, snapshot.Google is on android
System subregions signature, completeness check and userdata subregion encryption functions are realized with Device mapper.
On android in single kernel multisystem scheme, each system realizes system schools with Device mapper
Test and encrypted with userdata, and bibliographic structure is the same.Primary Device mapper distinguish different using mount point
Device mapper entities ,/system this mount point wounds are passed through then just occurring in the scheme based on single kernel multisystem
Build up after work(Device Mapper, second system can not just use the mount point of same title to create Device Mapper
The problem of.
One feasible solution is that the file system of Device Mapper mechanism will be needed to use in different systems
Change different mount points into, but the program needs to change many codes using this document system, and the service newly increased is all needed
It is noted that the problem.
The content of the invention
In order to solve the problems of the prior art, the invention provides a kind of device based on android containers
Mapper partition methods.
The invention provides a kind of device mapper partition methods based on android containers, comprise the following steps：
S1, be operating system nucleus in mnt namespace structures addition one linked list head dm_list, the mnt_
Namespace structures are used to create device mapper, and the device mapper newly created are suspended to mnt_namespace
Linked list head dm_list for head chained list on, each mnt namespace have a device mapper chained list；
S2, inquiry device mapper in need operation, where being required for first determining the device mapper to be found
Mnt namespace, then on the linked list head dm_list of the mnt namespace search.
As a further improvement on the present invention, device mapper foundation step is：In operating system nucleus, look for
To the corresponding mnt namespace of current process, judge whether there is the device of mount point of the same name on the mnt namespace
Mapper, if so, then returning to mistake, if it is not, creating device mapper, and is mounted to correspondence mnt
On namespace linked list head dm_list.
The beneficial effects of the invention are as follows：Because Device Mapper are kernel virtual drives, so in the absence of difference
Android machines it is incompatible the problem of, improve compatibility.
Brief description of the drawings
Fig. 1 is a kind of device mapper of the device mapper partition methods based on android containers of the present invention
Chained list schematic diagram.
Fig. 2 is a kind of device mapper of the device mapper partition methods based on android containers of the present invention
Visioning procedure figure.
Embodiment
The invention will be further described for explanation and embodiment below in conjunction with the accompanying drawings.
The problem of conflicting for the Device Mapper mount points of the same name solved in single kernel multisystem, the present invention proposed one
The scheme based on linux namespace of kind, solves the problem in Device Mapper driving.
As shown in Figure 1 to Figure 2, a kind of device mapper partition methods based on android containers, including following step
Suddenly：
1st, it is that struct mnt_namespace in kernel add a linked list head dm_list, the structure with creating later
When building device mapper, the device mapper newly created are suspended to the chain using mnt_namespace dm_list as head
On table.
2nd, it is the mnt in kernel when calling one new mnt namespace of establishment by systems such as clone ()
Namespace's.
3rd, as one device mapper of some system creation, by the corresponding mnt namespace of the process, so
The device mapper structures newly created are suspended on correspondence mnt namespace dm_list afterwards.
4th, inquiry device mapper in need operation, be required for the device mapper institutes for first determining to be found
Mnt namespace, then on the dm_list of the mnt namespace search.
As shown in figure 1, each mnt namespace have a device mapper chained list.
Device mapper foundation step is：In operating system nucleus, the corresponding mnt of current process is found
Namespace, judges whether there are the device mapper of mount point of the same name on the mnt namespace, if so, then returning
Mistake is returned, if it is not, creating device mapper, and correspondence mnt namespace linked list head dm_list is mounted to
On.
A kind of device mapper partition methods based on android containers that the present invention is provided have advantages below：
1. because Device Mapper are kernel virtual drives, so incompatible in the absence of different android machines
The problem of.
2. without the concern for the interface used in modification android to device Mapper.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (2)
1. a kind of device mapper partition methods based on android containers, it is characterised in that comprise the following steps：
S1, be operating system nucleus in mnt namespace structures addition one linked list head dm_list, the mnt_
Namespace structures are used to create device mapper, and the device mapper newly created are suspended to mnt_namespace
Linked list head dm_list for head chained list on, each mnt namespace have a device mapper chained list；
S2, inquiry device mapper in need operation, where being required for first determining the device mapper to be found
Mnt namespace, then on the linked list head dm_list of the mnt namespace search.
2. the device mapper partition methods according to claim 1 based on android containers, it is characterised in that
Device mapper foundation step is：In operating system nucleus, the corresponding mnt namespace of current process are found, are sentenced
Whether on the mnt namespace have the device mapper of of the same name mount point, if so, mistake is then returned to, if do not had if breaking
Have, then create device mapper, and be mounted on correspondence mnt namespace linked list head dm_list.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710326456.0A CN107229467A (en) | 2017-05-10 | 2017-05-10 | A kind of device mapper partition methods based on android containers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710326456.0A CN107229467A (en) | 2017-05-10 | 2017-05-10 | A kind of device mapper partition methods based on android containers |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109190386A (en) * | 2018-04-04 | 2019-01-11 | 中国电子科技网络信息安全有限公司 | Container mirror image layered encryption storage method based on Device Mapper |
| CN113641437A (en) * | 2021-08-16 | 2021-11-12 | 深圳技德智能科技研究院有限公司 | Linux-compatible Android application interface rotation method and device |
Citations (2)
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| CN101334785A (en) * | 2008-07-30 | 2008-12-31 | 浙江大学 | Method for organizing dummy catalog and managing naming space for distributed file systems |
| CN106209741A (en) * | 2015-05-06 | 2016-12-07 | 阿里巴巴集团控股有限公司 | A kind of fictitious host computer and partition method, resource access request processing method and processing device |
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2017
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Patent Citations (2)
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|---|---|---|---|---|
| CN101334785A (en) * | 2008-07-30 | 2008-12-31 | 浙江大学 | Method for organizing dummy catalog and managing naming space for distributed file systems |
| CN106209741A (en) * | 2015-05-06 | 2016-12-07 | 阿里巴巴集团控股有限公司 | A kind of fictitious host computer and partition method, resource access request processing method and processing device |
Non-Patent Citations (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109190386A (en) * | 2018-04-04 | 2019-01-11 | 中国电子科技网络信息安全有限公司 | Container mirror image layered encryption storage method based on Device Mapper |
| CN113641437A (en) * | 2021-08-16 | 2021-11-12 | 深圳技德智能科技研究院有限公司 | Linux-compatible Android application interface rotation method and device |
| CN113641437B (en) * | 2021-08-16 | 2023-06-16 | 深圳技德智能科技研究院有限公司 | Android-compatible application interface rotation method and device for Linux |
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Effective date of abandoning: 20210423 |
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