Open ktprograms opened 2 years ago
Hey @ktprograms creating idmapped mounts requires filesystem support and 9p simply hasn't been converted to support idmapped mounts yet.
Ah, I see. From reading the description of it I thought it didn't require filesystem support.
Would there be any way to do ID-mapping for 9pfs?
In principle 9pfs can support this going forward.
What changes would need to be made?
Could you please link to the implementation for other filesystems so I can take a look? I wouldn't mind looking at trying to implement it.
Yeah, I can certainly help you there. Is it ok if I wait until after next week. I won't have time before that.
On Thu Jun 16, 2022 at 8:47 PM +08, Christian Brauner wrote:
Yeah, I can certainly help you there. Is it ok if I wait until after next week. I won't have time before that.
Thanks. Sure, I'm in no hurry to get it done.
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Hi @brauner, do you have some links to documentation/other implementations?
Hi, I found out about ID-mapped mounts from LWN and found this tool.
I was able to make it work mounting a regular directory, but when I tried to ID-map a directory mounted from QEMU 9p virtio share, I get an
Invalid argument
error. I'm on Alpine aarch64, with kernel 5.15.29. Commands ran and output below: