[pve-devel] [PATCH qemu] PVE backup: improve error when copy-before-write fails for fleecing

[Fiona Ebner]

Am 29.04.24 um 14:53 schrieb Fiona Ebner:
> With fleecing, failure for copy-before-write does not fail the guest
> write, but only sets the snapshot error that is associated to the
> copy-before-write filter, making further requests to the snapshot
> access fail with EACCES, which then also fails the job. But that error
> code is not the root cause of why the backup failed, so bubble up the
> original snapshot error instead.
> 
> Reported-by: Friedrich Weber <f.weber at proxmox.com>
> Signed-off-by: Fiona Ebner <f.ebner at proxmox.com>
> Tested-by: Friedrich Weber <f.weber at proxmox.com>
> ---
> 
> Should have a "fixes #5409:" prefix when applied in the parent git

It seems the user does not run into the timeout, but some other issue
https://bugzilla.proxmox.com/show_bug.cgi?id=5409#c15
So while we will better see what the issue is, it's not a fix after all.

> module. Please consider applying this after the update to QEMU 9.0.0.
> Otherwise, I'll have to adapt and re-send that.
>