See the patch itself for the rationale behind it.
Signed-off-by: Christoph Heiss <c.he...@proxmox.com>
---
...-bridge-update-bridge-fd-valid-range.patch | 55 +++++++++++++++++++
debian/patches/series | 1 +
2 files changed, 56 insertions(+)
create mode 100644
debian/patches/pve/0012-Revert-addons-bridge-update-bridge-fd-valid-range.patch
diff --git
a/debian/patches/pve/0012-Revert-addons-bridge-update-bridge-fd-valid-range.patch
b/debian/patches/pve/0012-Revert-addons-bridge-update-bridge-fd-valid-range.patch
new file mode 100644
index 0000000..dbb8bfa
--- /dev/null
+++
b/debian/patches/pve/0012-Revert-addons-bridge-update-bridge-fd-valid-range.patch
@@ -0,0 +1,55 @@
+From 691b3a80713f4afb144f058610fc0a83ceb14be9 Mon Sep 17 00:00:00 2001
+From: Christoph Heiss <c.he...@proxmox.com>
+Date: Thu, 17 Apr 2025 11:49:52 +0200
+Subject: [PATCH] Revert "addons: bridge: update bridge-fd valid range"
+
+This reverts commit 74d286d18f89d4f54c10dac2d2284408d46b5c0e.
+
+When STP is disabled on the bridge (i.e. `bridge-stp off`), 0 is
+actually a valid value for the bridge forward delay, aka. `bridge-fd 0`.
+
+According to kernel commit
+
+ 8a921265e ("Revert "bridge: Allow forward delay to be cfgd when STP
enabled"")
+
+this is actually by design [0], to immediately mark the bridge as
+forwarding with STP turned off.
+
+So revert the broken upstream commit.
+
+[0]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8a921265e2cd31e61a0c2eda582af54c5bfef897
+
+Signed-off-by: Christoph Heiss <c.he...@proxmox.com>
+---
+ debian/changelog | 1 -
+ ifupdown2/addons/bridge.py | 2 +-
+ 2 files changed, 1 insertion(+), 2 deletions(-)
+
+diff --git a/debian/changelog b/debian/changelog
+index ed0d6622..9e8f12a0 100644
+--- a/debian/changelog
++++ b/debian/changelog
+@@ -39,7 +39,6 @@ ifupdown2 (3.3.0) unstable; urgency=medium
+ * Fix: keep link down after mac change if 'link-down yes' is specified
+ * Fix: addressvirtual: stale mac detection is missing vrr without ip
+ * Fix: bond: warn if sub interface is detected on bond slave
+- * Fix: bridge: update bridge-fd valid range to 2-255
+
+ -- Julien Fortin <jfor...@nvidia.com> Thu, 04 May 2023 23:42:42 -0700
+
+diff --git a/ifupdown2/addons/bridge.py b/ifupdown2/addons/bridge.py
+index e70710ee..5a38d56c 100644
+--- a/ifupdown2/addons/bridge.py
++++ b/ifupdown2/addons/bridge.py
+@@ -98,7 +98,7 @@ class bridge(Bridge, moduleBase):
+ },
+ "bridge-fd": {
+ "help": "bridge forward delay",
+- "validrange": ["2", "255"],
++ "validrange": ["0", "255"],
+ "example": ["bridge-fd 15"],
+ "default": "15"
+ },
+--
+2.48.1
+
diff --git a/debian/patches/series b/debian/patches/series
index 23ccbe6..eab43d8 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -10,3 +10,4 @@ pve/0008-lacp-bond-remove-bond-min-links-0-warning.patch
pve/0009-gvgeb-fix-python-interpreter-shebang.patch
pve/0010-main-ignore-dpkg-files-when-running-hook-scripts.patch
pve/0011-setup-drop-faulty-install-line-for-non-existing-ifup.patch
+pve/0012-Revert-addons-bridge-update-bridge-fd-valid-range.patch
--
2.49.0
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