[pve-devel] [PATCH storage 1/3] prune: introduce keep-all option

[Fabian Ebner <f.ebner@proxmox.com>]

useful to have an alternative to the old maxfiles = 0. There has to
be a way for vzdump to distinguish between:
1. use the /etc/vzdump.conf default (when no options are configured for the storage)
2. use no limit (when keep-all=1)

Signed-off-by: Fabian Ebner <f.ebner@proxmox.com>
---

A mutual dependency bump between storage and manager is needed for this and
patch #3.

 PVE/Storage.pm           |  9 ++++++---
 PVE/Storage/PBSPlugin.pm | 15 +++++++++++----
 PVE/Storage/Plugin.pm    | 20 +++++++++++++++++++-
 3 files changed, 36 insertions(+), 8 deletions(-)

diff --git a/PVE/Storage.pm b/PVE/Storage.pm
index bd6e15e..d613469 100755
--- a/PVE/Storage.pm
+++ b/PVE/Storage.pm
@@ -41,11 +41,11 @@ use PVE::Storage::DRBDPlugin;
 use PVE::Storage::PBSPlugin;
 
 # Storage API version. Increment it on changes in storage API interface.
-use constant APIVER => 8;
+use constant APIVER => 9;
 # Age is the number of versions we're backward compatible with.
 # This is like having 'current=APIVER' and age='APIAGE' in libtool,
 # see https://www.gnu.org/software/libtool/manual/html_node/Libtool-versioning.html
-use constant APIAGE => 7;
+use constant APIAGE => 8;
 
 # load standard plugins
 PVE::Storage::DirPlugin->register();
@@ -1622,7 +1622,10 @@ my $prune_mark = sub {
 sub prune_mark_backup_group {
     my ($backup_group, $keep) = @_;
 
-    if (!scalar(grep {$_ > 0} values %{$keep})) {
+    my $keep_all = delete $keep->{'keep-all'};
+
+    if ($keep_all || !scalar(grep {$_ > 0} values %{$keep})) {
+	$keep = { 'keep-all' => 1 } if $keep_all;
 	foreach my $prune_entry (@{$backup_group}) {
 	    $prune_entry->{mark} = 'keep';
 	}
diff --git a/PVE/Storage/PBSPlugin.pm b/PVE/Storage/PBSPlugin.pm
index 2e6d3f6..ef9bc79 100644
--- a/PVE/Storage/PBSPlugin.pm
+++ b/PVE/Storage/PBSPlugin.pm
@@ -313,10 +313,17 @@ sub prune_backups {
     }
 
     my @param;
-    foreach my $opt (keys %{$keep}) {
-	next if $keep->{$opt} == 0;
-	push @param, "--$opt";
-	push @param, "$keep->{$opt}";
+
+    my $keep_all = delete $keep->{'keep-all'};
+
+    if (!$keep_all) {
+	foreach my $opt (keys %{$keep}) {
+	    next if $keep->{$opt} == 0;
+	    push @param, "--$opt";
+	    push @param, "$keep->{$opt}";
+	}
+    } else { # no need to pass anything to PBS
+	$keep = { 'keep-all' => 1 };
     }
 
     push @param, '--dry-run' if $dryrun;
diff --git a/PVE/Storage/Plugin.pm b/PVE/Storage/Plugin.pm
index fe56864..391f441 100644
--- a/PVE/Storage/Plugin.pm
+++ b/PVE/Storage/Plugin.pm
@@ -52,6 +52,11 @@ my %prune_option = (
 );
 
 our $prune_backups_format = {
+    'keep-all' => {
+	type => 'boolean',
+	description => 'Keep all backups. Conflicts with the other options when true.',
+	optional => 1,
+    },
     'keep-last' => {
 	%prune_option,
 	description => 'Keep the last <N> backups.',
@@ -82,7 +87,20 @@ our $prune_backups_format = {
 		       'than one backup for a single year, only the latest one is kept.'
     },
 };
-PVE::JSONSchema::register_format('prune-backups', $prune_backups_format);
+PVE::JSONSchema::register_format('prune-backups', $prune_backups_format, \&validate_prune_backups);
+sub validate_prune_backups {
+    my ($prune_backups) = @_;
+
+    my $keep_all = delete $prune_backups->{'keep-all'};
+
+    if (!scalar(grep {$_ > 0} values %{$prune_backups})) {
+	$prune_backups = { 'keep-all' => 1 };
+    } elsif ($keep_all) {
+	die "keep-all cannot be set together with other options.\n";
+    }
+
+    return $prune_backups;
+}
 register_standard_option('prune-backups', {
     description => "The retention options with shorter intervals are processed first " .
 		   "with --keep-last being the very first one. Each option covers a " .
-- 
2.20.1