FUSE-T on MacOS

Features and Ideas
1

Would FUSE-T be usable for Restic on Mac? I have MacFUSE working right now just fine, but I know Apple is trying to force users away from kernel extensions. A userspace FUSE makes sense. I’m just not sure if Restic could be made to utilize it?

I came across this while trying to mount an NTFS volume, and found instructions on how to hack FUSE-T in and use it instead of MacFUSE:

https://www.reddit.com/r/MacOS/comments/16vmecr/ntfs_on_macos_sonoma_hacky_but_works/

2

I am with you on this - FUSE-T support would be something extremely beneficial for macOS crowd. MacFUSE days are over already.

3

It looks like fuse-t can be supported without using CGO. There’s initial support in Get FUSE-T support stable · Issue #4 · anacrolix/fuse · GitHub . It would help if someone could give build(deps): bump github.com/anacrolix/fuse from 0.2.0 to 0.3.0 by dependabot[bot] · Pull Request #4556 · restic/restic · GitHub a try. However, last time I looked the code failed to compile on Linux, such that we likely have to wait for a new release of the fuse library.

1 Like
4

I was able to build it and mount my repo on an Intel MacBook :+1:

It mounted differently. It usually mounts on the desktop with “macFUSE Volume 0 (restic)” as the name. This time it mounted with the name of the mount folder instead. It also appears to have mounted MUCH more quickly with this new build. Promising indeed!

5

Oh wow! It was even able to mount my work repo.

So my home repo is about ~4TB. It mounts just fine with the main build and this build. But since this build did it faster, I was curious if it would mount my work repo.

My work repo is about ~7TB. On both my Intel and M1 Mac, it swells to about ~15GB of RAM then is killed by Zsh. Both Macs only have 16GB of RAM. I typically have to restic copy to a local, smaller repo, and can then mount it. Or use a combination of ls and restore to figure out what I want and restore it.

With this build, it took a good 10 minutes, but it only swelled to about ~13GB of RAM then successfully mounted and released all that RAM. So this PR is definitely on to something. :slight_smile:

EDIT: If I eject it via MacOS instead of CTRL+C in the Terminal, I do get a runtime error haha

repository f186139f opened (version 2, compression level max)
[1:50] 100.00%  476 / 476 index files loaded
Now serving the repository at /Users/akrabu/mnt/3
Use another terminal or tool to browse the contents of this folder.
When finished, quit with Ctrl-c here or umount the mountpoint.
panic: runtime error: slice bounds out of range [4:0]

goroutine 1 [running]:
github.com/anacrolix/fuse.(*Conn).ReadSingle(0x274a100?, {0xc0ee17a000, 0x1001000, 0x1001000})
	github.com/anacrolix/fuse@v0.3.0/fuse.go:611 +0xdd
github.com/anacrolix/fuse.(*Conn).ReadRequest(0xc05897f200)
	github.com/anacrolix/fuse@v0.3.0/fuse.go:628 +0xfa
github.com/anacrolix/fuse/fs.(*Server).Serve(0xc00035a000, {0x1f816c0?, 0xc0001d83c0})
	github.com/anacrolix/fuse@v0.3.0/fs/serve.go:503 +0x385
github.com/anacrolix/fuse/fs.Serve(0xc05897f200, {0x1f816c0, 0xc0001d83c0})
	github.com/anacrolix/fuse@v0.3.0/fs/serve.go:524 +0x135
main.runMount({_, _}, {0x0, 0x0, 0x0, {{}, {0x0, 0x0, 0x0}, {0x0, ...}, ...}, ...}, ...)
	github.com/restic/restic/cmd/restic/cmd_mount.go:198 +0x7c7
main.glob..func17(0xc000209700?, {0xc00040c0b0?, 0x4?, 0x1db6f12?})
	github.com/restic/restic/cmd/restic/cmd_mount.go:71 +0x89
github.com/spf13/cobra.(*Command).execute(0x275a820, {0xc00040c070, 0x1, 0x1})
	github.com/spf13/cobra@v1.7.0/command.go:940 +0x87c
github.com/spf13/cobra.(*Command).ExecuteC(0x275c7c0)
	github.com/spf13/cobra@v1.7.0/command.go:1068 +0x3a5
github.com/spf13/cobra.(*Command).Execute(...)
	github.com/spf13/cobra@v1.7.0/command.go:992
github.com/spf13/cobra.(*Command).ExecuteContext(...)
	github.com/spf13/cobra@v1.7.0/command.go:985
main.main()
	github.com/restic/restic/cmd/restic/main.go:109 +0x1a5