[PATCH ifupdown2] d/patches: preserve OVS options on reload

[Pavel Afonin <afonin.pb@yandex.ru>]

When reloading an existing OVS bridge, the openvswitch addon currently
adds the bridge and applies configured OVS options before clearing stale
bridge and interface state.

This can generate a command sequence where configured values such as
other_config entries are set first and then immediately removed again by
the following clear bridge command. As a result, OVS options configured
in /etc/network/interfaces disappear after ifreload.

Add a downstream patch that moves bridge creation and OVS option
application after the cleanup block, so stale state is cleared first and
the desired configuration is applied afterwards.

Fixes: https://bugzilla.proxmox.com/show_bug.cgi?id=7030
Link: https://github.com/CumulusNetworks/ifupdown2/issues/344
Link: https://github.com/CumulusNetworks/ifupdown2/pull/345

Signed-off-by: Pavel Afonin <afonin.pb@yandex.ru>
---
 ...witch-preserve-ovs-options-on-reload.patch | 69 +++++++++++++++++++
 debian/patches/series                         |  1 +
 2 files changed, 70 insertions(+)
 create mode 100644 debian/patches/pve/0016-openvswitch-preserve-ovs-options-on-reload.patch

diff --git a/debian/patches/pve/0016-openvswitch-preserve-ovs-options-on-reload.patch b/debian/patches/pve/0016-openvswitch-preserve-ovs-options-on-reload.patch
new file mode 100644
index 0000000..be7b9ff
--- /dev/null
+++ b/debian/patches/pve/0016-openvswitch-preserve-ovs-options-on-reload.patch
@@ -0,0 +1,69 @@
+From 221cce42f29e5578a5d074f718942636d5917e97 Mon Sep 17 00:00:00 2001
+From: Pavel Afonin <afonin.pb@yandex.ru>
+Date: Sat, 25 Apr 2026 23:29:27 +0300
+Subject: [PATCH] openvswitch: preserve OVS options on reload
+
+When reloading an existing OVS bridge, the openvswitch addon currently
+adds the bridge and applies configured OVS options before clearing stale
+bridge and interface state.
+
+This can generate a command sequence where configured values such as
+other_config entries are set first and then immediately removed again by
+the following clear bridge command. As a result, OVS options configured
+in /etc/network/interfaces disappear after ifreload.
+
+Move bridge creation and OVS option application after the cleanup block,
+so stale state is cleared first and the desired configuration is applied
+afterwards. Initial bridge creation is unchanged, because the cleanup
+block only runs for existing links.
+
+Fixes: https://bugzilla.proxmox.com/show_bug.cgi?id=7030
+Link: https://github.com/CumulusNetworks/ifupdown2/issues/344
+Link: https://github.com/CumulusNetworks/ifupdown2/pull/345
+
+Signed-off-by: Pavel Afonin <afonin.pb@yandex.ru>
+---
+ ifupdown2/addons/openvswitch.py | 20 ++++++++++----------
+ 1 file changed, 10 insertions(+), 10 deletions(-)
+
+diff --git a/ifupdown2/addons/openvswitch.py b/ifupdown2/addons/openvswitch.py
+index 0a124ba..352633a 100644
+--- a/ifupdown2/addons/openvswitch.py
++++ b/ifupdown2/addons/openvswitch.py
+@@ -155,16 +155,6 @@ class openvswitch(Addon, moduleBase):
+ 
+         cmd_list = []
+ 
+-        cmd = "--may-exist add-br %s"%(iface)
+-        if ovsparent is not None and ovsoptions:
+-            cmd = cmd + " %s" %(ovsoptions)
+-
+-        cmd_list.append(cmd)
+-
+-        if ovsparent is None and ovsoptions:
+-            cmd = "set bridge %s %s" %(iface, ovsoptions)
+-            cmd_list.append(cmd)
+-
+         #update
+         if self.cache.link_exists (iface):
+             # on update, delete active ports not in the new port list
+@@ -192,6 +182,16 @@ class openvswitch(Addon, moduleBase):
+             cmd = "--if-exists clear interface %s mtu_request external-ids other_config options"%(iface)
+             cmd_list.append(cmd)
+ 
++        cmd = "--may-exist add-br %s"%(iface)
++        if ovsparent is not None and ovsoptions:
++            cmd = cmd + " %s" %(ovsoptions)
++
++        cmd_list.append(cmd)
++
++        if ovsparent is None and ovsoptions:
++            cmd = "set bridge %s %s" %(iface, ovsoptions)
++            cmd_list.append(cmd)
++
+         if ovsextra is not None:
+             cmd_list.extend(ovsextra)
+ 
+-- 
+2.39.5
+
diff --git a/debian/patches/series b/debian/patches/series
index 2865533..35198f4 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -16,3 +16,4 @@ upstream/0001-use-raw-strings-for-regex-to-fix-backslash-interpret.patch
 upstream/0002-vxlan-add-support-for-IPv6-vxlan-local-tunnelip.patch
 pve/0014-nlmanager-read-ipv6-devconf-disable_ipv6-attribute-t.patch
 pve/0015-revert-addons-bond-warn-if-sub-interface-is-detected-on-bond-slave.patch
+pve/0016-openvswitch-preserve-ovs-options-on-reload.patch
-- 
2.39.5