pve-qemu/debian/patches/pve/0001-PVE-Config-block-file-change-locking-default-to-off.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Wolfgang Bumiller <w.bumiller@proxmox.com>
Date: Tue, 10 Mar 2020 12:54:58 +0100
Subject: [PATCH 01/32] PVE: [Config] block/file: change locking default to off

'auto' only checks whether the system generally supports OFD
locks but not whether the storage the file resides on
supports any locking, causing issues with NFS.

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
---
 block/file-posix.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/block/file-posix.c b/block/file-posix.c
index 1b805bd938..44b49265ae 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -449,7 +449,7 @@ static QemuOptsList raw_runtime_opts = {
         {
             .name = "locking",
             .type = QEMU_OPT_STRING,
-            .help = "file locking mode (on/off/auto, default: auto)",
+            .help = "file locking mode (on/off/auto, default: off)",
         },
         {
             .name = "pr-manager",
@@ -538,7 +538,7 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
         s->use_lock = false;
         break;
     case ON_OFF_AUTO_AUTO:
-        s->use_lock = qemu_has_ofd_lock();
+        s->use_lock = false;
         break;
     default:
         abort();