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vm start/stop: cleanup passed-through pci devices in more situations

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if the preparing of PCI devices or the start of the VM fails, we need
to cleanup the PCI devices (reservations *and* mdevs), or else it
might happen that there are leftovers which must be manually removed.

to include also mdevs now, refactor the cleanup code from
'vm_stop_cleanup' into it's own function, and call that instead of
only 'remove_pci_reservation'

also simplifies the code, such that it now removes all PCI ids
reserved for that VMID, since we cannot have multiple VMs with the
same VMID anyway

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
This commit is contained in:
Dominik Csapak 2022-09-20 14:50:16 +02:00 committed by Thomas Lamprecht
parent 76b29aafd7
commit 1b189121fc
2 changed files with 25 additions and 21 deletions
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34
PVE/QemuServer.pm
View File

@ -5632,7 +5632,7 @@ sub vm_start_nolock {
push @$cmd, '-uuid', $uuid if defined($uuid);
};
if (my $err = $@) {
eval { PVE::QemuServer::PCI::remove_pci_reservation($pci_id_list) };
eval { cleanup_pci_devices($vmid, $conf) };
warn $@ if $@;
die $err;
}
@ -5728,7 +5728,9 @@ sub vm_start_nolock {
if (my $err = $@) {
# deactivate volumes if start fails
eval { PVE::Storage::deactivate_volumes($storecfg, $vollist); };
eval { PVE::QemuServer::PCI::remove_pci_reservation($pci_id_list) };
warn $@ if $@;
eval { cleanup_pci_devices($vmid, $conf) };
warn $@ if $@;
die "start failed: $err";
}
@ -5893,6 +5895,19 @@ sub get_vm_volumes {
return $vollist;
}
sub cleanup_pci_devices {
my ($vmid, $conf) = @_;
foreach my $key (keys %$conf) {
next if $key !~ m/^hostpci(\d+)$/;
my $hostpciindex = $1;
my $uuid = PVE::SysFSTools::generate_mdev_uuid($vmid, $hostpciindex);
my $d = parse_hostpci($conf->{$key});
PVE::SysFSTools::pci_cleanup_mdev_device($uuid) if $d->{mdev};
}
PVE::QemuServer::PCI::remove_pci_reservation($vmid);
}
sub vm_stop_cleanup {
my ($storecfg, $vmid, $conf, $keepActive, $apply_pending_changes) = @_;
@ -5924,20 +5939,7 @@ sub vm_stop_cleanup {
unlink '/dev/shm/pve-shm-' . ($ivshmem->{name} // $vmid);
}
my $ids = [];
foreach my $key (keys %$conf) {
next if $key !~ m/^hostpci(\d+)$/;
my $hostpciindex = $1;
my $d = parse_hostpci($conf->{$key});
my $uuid = PVE::SysFSTools::generate_mdev_uuid($vmid, $hostpciindex);
foreach my $pci (@{$d->{pciid}}) {
my $pciid = $pci->{id};
push @$ids, $pci->{id};
PVE::SysFSTools::pci_cleanup_mdev_device($pciid, $uuid);
}
}
PVE::QemuServer::PCI::remove_pci_reservation($ids);
cleanup_pci_devices($vmid, $conf);
vmconfig_apply_pending($vmid, $conf, $storecfg) if $apply_pending_changes;
};

12
PVE/QemuServer/PCI.pm
View File

@ -552,15 +552,17 @@ my $write_pci_reservation_unlocked = sub {
PVE::Tools::file_set_contents($PCIID_RESERVATION_FILE, $data);
};
# removes all pci reservations of the given vmid
sub remove_pci_reservation {
my ($dropped_ids) = @_;
$dropped_ids = [ $dropped_ids ] if !ref($dropped_ids);
return if !scalar(@$dropped_ids); # do nothing for empty list
my ($vmid) = @_;
PVE::Tools::lock_file($PCIID_RESERVATION_LOCK, 2, sub {
my $reservation_list = $parse_pci_reservation_unlocked->();
delete $reservation_list->@{$dropped_ids->@*};
for my $id (keys %$reservation_list) {
my $reservation = $reservation_list->{$id};
next if $reservation->{vmid} != $vmid;
delete $reservation_list->{$id};
}
$write_pci_reservation_unlocked->($reservation_list);
});
die $@ if $@;