Extended attributes

Posted Jan 4, 2019 9:01 UTC (Fri) by Cyberax (✭ supporter ✭, #52523)
In reply to: Extended attributes by epa
Parent article: A setback for fs-verity

Merkle tree is self-verifying, so it doesn't need to be further checksummed.

Extended attributes

Posted Jan 5, 2019 21:22 UTC (Sat) by epa (subscriber, #39769) [Link] (1 responses)

What I mean is that since the alternate data streams are exposed to user space, each one needs its Merkle tree. So it would appear you need to implement the verifying at some lower level of filesystem code where you are dealing with a single piece of data. Either that or generalize it to add one extra steam for each stream that exists - and then arrange to hide these extra ones from user space.

Extended attributes

Posted Jan 7, 2019 2:40 UTC (Mon) by marcH (subscriber, #57642) [Link]

> or generalize it to add one extra steam for each stream that exists

Sounds good.

> and then arrange to hide these extra ones from user space.

Why? Aren't stream typed on some way?