--- Begin Message ---
Hi,
Sorry. But I always get extremely triggered by functions called
‘disable_ipv6()’.
Can someone hit me with a cluebat as to why that function even exists?
(Since we deploy Proxmox without IPv4, so anywhere where ipv6 is
actively disabled, will break stuff for us).
—
Mark Schouten, CTO
Tuxis B.V.
m...@tuxis.nl
------ Original Message ------
From "DERUMIER, Alexandre" <alexandre.derum...@groupe-cyllene.com>
To "Wolfgang Bumiller" <w.bumil...@proxmox.com>; "Alexandre Derumier"
<aderum...@odiso.com>
Cc "pve-devel@lists.proxmox.com" <pve-devel@lists.proxmox.com>
Date 20/10/2022 18:18:06
Subject Re: [pve-devel] [PATCH pve-common] fix #4299: network :
disable_ipv6: fix path checking
I'm really unable to reproduce this.
User is able to reproduce it 100%, depending on the brigde where the vm is
started.
(some bridge with sdn generated for example).
I don't have asked to user to reboot.
ifupdown2 seem to thrown warning too, so I don't known if it's a special sysctl
triggering this, or a kernel bug, or something else.
________________________________
From: Wolfgang Bumiller <w.bumil...@proxmox.com>
Sent: Thursday, October 20, 2022 12:05 PM
To: Alexandre Derumier <aderum...@odiso.com>
Cc: pve-devel@lists.proxmox.com <pve-devel@lists.proxmox.com>
Subject: Re: [pve-devel] [PATCH pve-common] fix #4299: network : disable_ipv6:
fix path checking
On Thu, Oct 20, 2022 at 12:24:29AM +0200, Alexandre Derumier wrote:
It's possible to have a
/proc/sys/net/ipv6/ directory
but no
/proc/sys/net/ipv6/conf/$iface/disable_ipv6
Do we know why this happens? That doesn't seem right to me, unless
some kind of race somewhere with the interface creation?
Or is there a legitimate kernel option that causes this?
Signed-off-by: Alexandre Derumier <aderum...@odiso.com>
---
src/PVE/Network.pm | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/PVE/Network.pm b/src/PVE/Network.pm
index c468e40..9d726cd 100644
--- a/src/PVE/Network.pm
+++ b/src/PVE/Network.pm
@@ -210,8 +210,8 @@ my $cond_create_bridge = sub {
sub disable_ipv6 {
my ($iface) = @_;
- return if !-d '/proc/sys/net/ipv6'; # ipv6 might be completely disabled
my $file = "/proc/sys/net/ipv6/conf/$iface/disable_ipv6";
+ return if !-e $file; # ipv6 might be completely disabled
open(my $fh, '>', $file) or die "failed to open $file for writing: $!\n";
print {$fh} "1\n" or die "failed to disable link-local ipv6 for $iface\n";
close($fh);
--
2.30.2
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