[PATCH qemu-server v3 0/3] improve guest cleanup handling

[Dominik Csapak <d.csapak@proxmox.com>]

this is a combination of my previous patches[0][1] (v3 because [0] was
already v2)

First we make the cleanup handling more consistent (1/3)
then we check explicitely for the backup lock to improve the error
message for stop backup mode (2/3)
and then we fix #7119 by waiting up to 30s for a possibly still running
guest to stop (e.g. this can occur when using usb passthrouh) (3/3)

changes from v2/RFC:
* use 'vm_running_locally' for getting the pid
* improve error messages
* use a 'use_old_cleanup' flag that will be auto-removed by a reboot
  to signal if we can use the new cleanup logic or the old

0: https://lore.proxmox.com/pve-devel/20260210111612.2017883-1-d.csapak@proxmox.com/
1: https://lore.proxmox.com/pve-devel/20260223105542.1525232-1-d.csapak@proxmox.com/

Dominik Csapak (3):
  cleanup: refactor to make cleanup flow consistent
  qm cleanup: die early when encountering a running stop mode backup
  fix #7119: qm cleanup: wait for process exiting for up to 30 seconds

 debian/preinst                   | 16 +++++++++++++++
 src/PVE/CLI/qm.pm                | 35 +++++++++++++++++++++++++++-----
 src/PVE/QemuServer.pm            | 14 +++++++++++++
 src/PVE/QemuServer/RunState.pm   | 28 +++++++++++++++++++++++++
 src/test/MigrationTest/QmMock.pm | 16 +++++++++++++++
 5 files changed, 104 insertions(+), 5 deletions(-)
 create mode 100755 debian/preinst

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2.47.3