Previously, the web GUI timed out when removing content (e.g. backup) took
too long. Doing the main part of the API DELETE call in a fork_worker solves
this.

Signed-off-by: Dominic Jäger <d.jae...@proxmox.com>
---
v3->v4: Unchanged 

 PVE/API2/Storage/Content.pm | 45 +++++++++++++++++++++++++++++--------
 1 file changed, 36 insertions(+), 9 deletions(-)

diff --git a/PVE/API2/Storage/Content.pm b/PVE/API2/Storage/Content.pm
index cd4746b..9731720 100644
--- a/PVE/API2/Storage/Content.pm
+++ b/PVE/API2/Storage/Content.pm
@@ -285,9 +285,16 @@ __PACKAGE__->register_method ({
                type => 'string',
                completion => \&PVE::Storage::complete_volume,
            },
+           delay => {
+               type => 'integer',
+               description => "Time to wait for the task to finish. We return 
'null' if the task finish within that time.",
+               minimum => 1,
+               maximum => 30,
+               optional => 1,
+           },
        },
     },
-    returns => { type => 'null' },
+    returns => { type => 'string', optional => 1, },
     code => sub {
        my ($param) = @_;
 
@@ -306,16 +313,36 @@ __PACKAGE__->register_method ({
            $rpcenv->check($authuser, "/storage/$storeid", 
['Datastore.Allocate']);
        }
 
-       PVE::Storage::vdisk_free ($cfg, $volid);
+       my $worker = sub {
+           PVE::Storage::vdisk_free ($cfg, $volid);
+           print "Removed volume '$volid'\n";
+           if ($vtype eq 'backup'
+               && $path =~ 
/(.*\/vzdump-\w+-\d+-\d{4}_\d{2}_\d{2}-\d{2}_\d{2}_\d{2})[^\/]+$/) {
+               my $logpath = "$1.log";
+               # try to cleanup our backup log file too, if still exisiting, 
#318
+               unlink($logpath) if -e $logpath;
+           }
+       };
 
-       if ($vtype eq 'backup'
-           && $path =~ 
/(.*\/vzdump-\w+-\d+-\d{4}_\d{2}_\d{2}-\d{2}_\d{2}_\d{2})[^\/]+$/) {
-           my $logpath = "$1.log";
-           # try to cleanup our backup log file too, if still exisiting, #318
-           unlink($logpath) if -e $logpath;
+       my $id = (defined $ownervm ? "$ownervm@" : '') . $storeid;
+       my $upid = $rpcenv->fork_worker('imgdel', $id, $authuser, $worker);
+       my $background_delay = $param->{delay};
+       if ($background_delay) {
+           my $end_time = time() + $background_delay;
+           my $currently_deleting; # not necessarily true, e.g. sequential api 
call from cli
+           do {
+               my $task = PVE::Tools::upid_decode($upid);
+               $currently_deleting = 
PVE::ProcFSTools::check_process_running($task->{pid}, $task->{pstart});
+               sleep 1 if $currently_deleting;
+           } while (time() < $end_time && $currently_deleting);
+
+           if (!$currently_deleting) {
+               my $status = PVE::Tools::upid_read_status($upid);
+               return undef if $status eq 'OK';
+               die $status;
+           }
        }
-
-       return undef;
+       return $upid;
     }});
 
 __PACKAGE__->register_method ({
-- 
2.20.1

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