stratis: negative value as missing disc space, when tryint to do snapshot of FS.

[jscotka]

Explain what happens

I've just randomly tested stratis feature and try to just play with various features and my steps caused that I've seen negative integer in part where I've expect just unsigned int.

1. created some local loopback devices
2. created stratis pool with 2 discs
3. created few random FSs (in my case 4, some of them mounted) and ezhaoust all space of pool
4. try to create fs snapshot.
5. it show that you are unabel to do do snapshot. what is expected, but error is that there is negative number of space, what is bad and does not really probably show the problem, at least I've expected positive integer not negative value.

Version of Cockpit

311.1-1.el9

Where is the problem in Cockpit?

Storage

Server operating system

Red Hat Enterprise Linux

Server operating system version

9.4

What browsers are you using?

Firefox

System log

No response

[jscotka]

just randomly added another disc to pool, and now number there seems more senseful

There is not enough space in the pool to make a snapshot of this filesystem. At least 142 GB are required but only 105 GB are available.

So seems the issue is just in case there is zero space maybe

[jscotka]

as @mvollmer mentioned probably some rounding issue with subtracting 1MIB somewhere in the code. I'll inspect it later on.