Gabriel dd5de6900b Add some basic bind filter functions (#274)
* Add some basic bind filter functions

This change adds the ability to mount a a single folder or a volume
inside another folder, using the bind filter API.

While the API allows mounting multiple sources inside a single mount
point, acting as an overlay, we disable this functionality in the ApplyFileBinding
function.

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

* Add some tests

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

* Move bind filter to different package

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

* Use string in signature and fix getFinalPath

  * Properly close handle in getFinalPath()
  * Use string in function signature. mksyscall generates proper code to
    convert to utf16
  * Enable TestRemoveFileBinding on Windows Server 2019

Windows Server 2019 only exposes 2 function in bindfltapi.dll:

  * BfRemoveMapping
  * BfSetupFilter

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

* Use windows.UTF16ToString to decode string

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

* Optimize bfGetMappings signature

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

* Skip unsupported tests on ltsc2019

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

* Fix typo, add testcase

  * Additionally check if we can write to a read-only mount point, not
    just delete from it
  * No need to set FILE_FLAG_OPEN_REPARSE_POINT when opening a file

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

* Remove extra flags

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

* Add test to account for symlinks as sources

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

---------

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>
2023-02-28 11:37:19 -05:00
2022-08-22 11:09:02 -04:00
2023-02-13 12:19:14 -05:00
2023-02-13 12:19:14 -05:00
2016-01-30 18:11:47 -08:00
2022-06-16 18:05:25 +00:00
2022-08-29 16:27:34 -04:00

go-winio Build Status

This repository contains utilities for efficiently performing Win32 IO operations in Go. Currently, this is focused on accessing named pipes and other file handles, and for using named pipes as a net transport.

This code relies on IO completion ports to avoid blocking IO on system threads, allowing Go to reuse the thread to schedule another goroutine. This limits support to Windows Vista and newer operating systems. This is similar to the implementation of network sockets in Go's net package.

Please see the LICENSE file for licensing information.

Contributing

This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit Microsoft CLA.

When you submit a pull request, a CLA-bot will automatically determine whether you need to provide a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.

Additionally, the pull request pipeline requires the following steps to be performed before mergining.

Code Sign-Off

We require that contributors sign their commits using git commit --signoff to certify they either authored the work themselves or otherwise have permission to use it in this project.

A range of commits can be signed off using git rebase --signoff.

Please see the developer certificate for more info, as well as to make sure that you can attest to the rules listed. Our CI uses the DCO Github app to ensure that all commits in a given PR are signed-off.

Linting

Code must pass a linting stage, which uses golangci-lint. The linting settings are stored in .golangci.yaml, and can be run automatically with VSCode by adding the following to your workspace or folder settings:

    "go.lintTool": "golangci-lint",
    "go.lintOnSave": "package",

Additional editor integrations options are also available.

Alternatively, golangci-lint can be installed locally and run from the repo root:

# use . or specify a path to only lint a package
# to show all lint errors, use flags "--max-issues-per-linter=0 --max-same-issues=0"
> golangci-lint run ./...

Go Generate

The pipeline checks that auto-generated code, via go generate, are up to date.

This can be done for the entire repo:

> go generate ./...

Code of Conduct

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.

Special Thanks

Thanks to natefinch for the inspiration for this library. See npipe for another named pipe implementation.

S
Description
Win32 IO-related utilities for Go
Readme MIT
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