mirror of https://github.com/digint/btrbk
btrbk: unconditionally add clone sources to btrfs-send if necessary
Preferences for parent (and required clone sources): 1. closest older in snapdir (by btrbk timestamp), related 2. closest older related (by cgen) 3. closest newer related (by cgen) 4. closest older in snapdir (by btrbk timestamp) 5. closest newer in snapdir (by btrbk timestamp) Note: prefering 1 over 2 helps keeping parent-chain within droot on target (assuming that btrfs always uses correlated parent on btrfs-receive). This will e.g. add a clone source on "btrbk resume", if both older AND newer snapshot/backup pairs exists. Also makes sure that the closest older btrbk snapshot is always added as clone source, even if another related subvolume has newer cgen.pull/274/head
Axel Burri
parent
95e25eb2d1
commit
c407d41db2
204
btrbk
204
btrbk
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@ -1378,31 +1378,26 @@ sub btrfs_send_receive($$;$$$)
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my $snapshot = shift || die;
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my $target = shift || die;
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my $parent = shift;
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my $clone_src = shift // []; # arrayref of [ vinfo, correlated_target_node ]
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my $clone_src = shift // [];
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my $ret_vol_received = shift;
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my $snapshot_path = $snapshot->{PATH} // die;
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my $target_path = $target->{PATH} // die;
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my $parent_path = $parent ? $parent->{PATH} : undef;
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my @clone_src_path;
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my $incremental_clones = config_key($target, "incremental_clones");
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if(my $cnt = $incremental_clones) {
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@clone_src_path = map { --$cnt < 0 ? ( ) : $_->[0]{PATH} } @$clone_src;
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}
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my $vol_received = vinfo_child($target, $snapshot->{NAME});
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$$ret_vol_received = $vol_received if(ref $ret_vol_received);
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print STDOUT "Creating backup: $vol_received->{PRINT}\n" if($show_progress && (not $dryrun));
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INFO "[send/receive] target: $vol_received->{PRINT}";
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INFO "[send/receive] source: $snapshot->{PRINT}";
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INFO "[send/receive] parent: $parent->{PRINT}" if($parent);
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INFO "[send/receive] target: $vol_received->{PRINT}";
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INFO "[send/receive] using " . (scalar @clone_src_path) . " clone sources" if($incremental_clones);
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INFO "[send/receive] clone-src: $_->{PRINT}" foreach(@$clone_src);
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my @send_options;
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my @receive_options;
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push(@send_options, '-p', { unsafe => $parent_path} ) if($parent_path);
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push(@send_options, '-c', { unsafe => $_ } ) foreach(@clone_src_path);
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push(@send_options, '-c', { unsafe => $_ } ) foreach(map { $_->{PATH} } @$clone_src);
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# push(@send_options, '-v') if($loglevel >= 3);
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# push(@receive_options, '-v') if($loglevel >= 3);
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@ -2951,7 +2946,6 @@ sub _correlated_nodes($$)
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my $uuid = $src_vol->{node}{uuid};
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my $received_uuid = $src_vol->{node}{received_uuid};
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$received_uuid = undef if($received_uuid eq '-');
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TRACE "correlated_nodes: src_vol=\"$src_vol->{PRINT}\", droot=\"$droot->{PRINT}\"";
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my $received_uuid_hash = $droot->{node}{TREE_ROOT}{RECEIVED_UUID_HASH};
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my $uuid_hash = $droot->{node}{TREE_ROOT}{UUID_HASH};
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@ -2965,7 +2959,7 @@ sub _correlated_nodes($$)
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}
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@ret = grep($_->{readonly}, @match);
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TRACE "correlated_nodes: " . scalar(@ret) . " receive targets in \"$droot->{PRINT}/\" for: $src_vol->{PRINT}";
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TRACE "correlated_nodes: droot=\"$droot->{PRINT}/\", src_vol=\"$src_vol->{PRINT}\": " . join(", ", map _fs_path($_),@ret) if($loglevel >= 4);
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return @ret;
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}
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@ -3005,26 +2999,25 @@ sub get_receive_targets($$;@)
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# returns best correlated receive target within droot (independent of btrbk name)
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sub get_best_correlated_target($$;@)
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sub get_best_correlated($$;@)
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{
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my $droot = shift || die;
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my $src_vol = shift || die;
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my %opts = @_;
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my $filtered_nodes = $opts{push_filtered_nodes};
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my $inaccessible_nodes = $opts{push_inaccessible_nodes};
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my @correlated = _correlated_nodes($droot, $src_vol); # all matching src_vol, from droot->TREE_ROOT
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foreach (@correlated) {
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my $vinfo = vinfo_resolved($_, $droot); # $vinfo is within $resolve_droot
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return $vinfo if($vinfo);
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push @$filtered_nodes, $_ if($filtered_nodes);
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my $vinfo = vinfo_resolved($_, $droot); # $vinfo is within $droot
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return [ $src_vol, $vinfo ] if($vinfo);
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}
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if($opts{fallback_all_mountpoints}) {
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foreach (@correlated) {
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my $vinfo = vinfo_resolved_all_mountpoints($_, $droot); # $vinfo is within any mountpoint of filesystem at $droot
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return $vinfo if($vinfo);
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push @$filtered_nodes, $_ if($filtered_nodes);
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return [ $src_vol, $vinfo ] if($vinfo);
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}
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}
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push @$inaccessible_nodes, @correlated if($inaccessible_nodes);
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return undef;
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}
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@ -3071,8 +3064,8 @@ sub _push_related_children
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# returns all related readonly nodes (by parent_uuid relationship),
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# sort by absolute cgen delta, favor older
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sub get_related_subvolume_nodes($)
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# sorted by relation distance.
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sub get_related_readonly_nodes($)
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{
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my $vol = shift // die;
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TRACE "related_nodes: resolving related subvolumes of: $vol->{PATH}";
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@ -3100,21 +3093,22 @@ sub get_related_subvolume_nodes($)
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}
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WARN "Maximum distance reached, related subvolume search aborted" if($distance >= 256);
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TRACE "related_nodes: found total=" . scalar(@related_nodes) . " related readonly subvolumes";
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my @sorted = sort { (abs($cgen_ref - $a->{cgen}) <=> abs($cgen_ref - $b->{cgen})) ||
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($a->{cgen} <=> $b->{cgen}) } @related_nodes;
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return \@sorted;
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return \@related_nodes;
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}
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# returns ( parent, first_matching_target_node )
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# returns parent, along with clone sources
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sub get_best_parent($$$;@)
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{
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my $svol = shift // die;
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my $snaproot = shift // die;
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my $droot = shift || die;
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my %opts = @_;
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my $fallback_btrbk_basename = $opts{fallback_btrbk_basename} // 1; # default true, see below
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my $clone_src = $opts{clone_src};
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my $ret_clone_src = $opts{clone_src};
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my $ret_clone_src_extra = $opts{clone_src_extra};
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my $ret_target_parent_node = $opts{target_parent_node};
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TRACE "get_best_parent: resolving best common parent for subvolume: $svol->{PRINT} (droot=$droot->{PRINT})";
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# honor incremental_resolve option
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my $source_incremental_resolve = config_key($svol, "incremental_resolve");
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@ -3131,26 +3125,37 @@ sub get_best_parent($$$;@)
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my $source_fallback_all_mountpoints = ($source_incremental_resolve eq "_all_accessible");
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my $target_fallback_all_mountpoints = ($target_incremental_resolve eq "_all_accessible");
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TRACE "get_best_parent: resolving best common parent for subvolume: $svol->{PATH} (droot=$droot->{PRINT})";
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my $all_related_nodes = get_related_subvolume_nodes($svol);
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my @inaccessible_nodes;
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my %gbc_opts = ( push_inaccessible_nodes => \@inaccessible_nodes,
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fallback_all_mountpoints => $target_fallback_all_mountpoints,
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);
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# filter candidates
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my @candidate; # candidates for parent, ordered by "best suited"
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foreach (@$all_related_nodes) {
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# resolve correlated subvolumes by parent_uuid relationship
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my %c_rel_id; # map id to c_related
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my @c_related; # candidates for parent (correlated + related), unsorted
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foreach (@{get_related_readonly_nodes($svol)}) {
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my $vinfo = vinfo_resolved($_, $resolve_sroot);
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if((not $vinfo) && $source_fallback_all_mountpoints) { # related node is not under $resolve_sroot
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$vinfo = vinfo_resolved_all_mountpoints($_, $svol);
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}
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if($vinfo) {
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push @candidate, $vinfo;
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my $correlated = get_best_correlated($droot, $vinfo, %gbc_opts);
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push @c_related, $correlated if($correlated);
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$c_rel_id{$_->{id}} = $correlated;
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} else {
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DEBUG "Related subvolume is not accessible within $source_incremental_resolve \"$resolve_sroot->{PRINT}\": " . _fs_path($_);
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}
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}
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# sort by cgen
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my $cgen_ref = $svol->{node}{readonly} ? $svol->{node}{cgen} : $svol->{node}{gen};
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my @c_related_older = sort { ($cgen_ref - $a->[0]{node}{cgen}) <=> ($cgen_ref - $b->[0]{node}{cgen}) }
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grep { $_->[0]{node}{cgen} <= $cgen_ref } @c_related;
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my @c_related_newer = sort { ($a->[0]{node}{cgen} - $cgen_ref) <=> ($b->[0]{node}{cgen} - $cgen_ref) }
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grep { $_->[0]{node}{cgen} > $cgen_ref } @c_related;
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# NOTE: get_related_subvolume_nodes() is very sophisticated and
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# returns all known relations, there is always a chance that
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# relations get broken.
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# NOTE: While get_related_readonly_nodes() returns deep parent_uuid
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# relations, there is always a chance that these relations get
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# broken.
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#
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# Consider parent_uuid chain ($svol readonly)
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# B->A, C->B, delete B: C has no relation to A.
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@ -3159,43 +3164,88 @@ sub get_best_parent($$$;@)
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# For snapshots (here: S=$svol readwrite) the scenario is different:
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# A->S, B->S, C->S, delete B: A still has a relation to C.
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#
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# add subvolumes in same directory matching btrbk file name scheme
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if($fallback_btrbk_basename && exists($svol->{node}{BTRBK_BASENAME})) {
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# resolve correlated subvolumes in same directory matching btrbk file name scheme
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my (@c_snapdir_older, @c_snapdir_newer);
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if(exists($svol->{node}{BTRBK_BASENAME})) {
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my $snaproot_btrbk_direct_leaf = vinfo_subvol_list($snaproot, readonly => 1, btrbk_direct_leaf => $svol->{node}{BTRBK_BASENAME});
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my @direct_leaf_older = grep { cmp_date($_->{node}{BTRBK_DATE}, $svol->{node}{BTRBK_DATE}) < 0 } @$snaproot_btrbk_direct_leaf;
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my @direct_leaf_newer = grep { cmp_date($_->{node}{BTRBK_DATE}, $svol->{node}{BTRBK_DATE}) > 0 } @$snaproot_btrbk_direct_leaf;
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push @candidate, sort { cmp_date($b->{node}{BTRBK_DATE}, $a->{node}{BTRBK_DATE}) } @direct_leaf_older;
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push @candidate, sort { cmp_date($a->{node}{BTRBK_DATE}, $b->{node}{BTRBK_DATE}) } @direct_leaf_newer;
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TRACE "get_best_parent: subvolume has btrbk naming scheme, add " . scalar(@direct_leaf_older) . " older and " . scalar(@direct_leaf_newer) . " newer (by file suffix) candidates with scheme: $snaproot->{PRINT}/$svol->{node}{BTRBK_BASENAME}.*";
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my @sbdl_older = sort { cmp_date($b->{node}{BTRBK_DATE}, $a->{node}{BTRBK_DATE}) }
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grep { cmp_date($_->{node}{BTRBK_DATE}, $svol->{node}{BTRBK_DATE}) < 0 } @$snaproot_btrbk_direct_leaf;
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my @sbdl_newer = sort { cmp_date($a->{node}{BTRBK_DATE}, $b->{node}{BTRBK_DATE}) }
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grep { cmp_date($_->{node}{BTRBK_DATE}, $svol->{node}{BTRBK_DATE}) > 0 } @$snaproot_btrbk_direct_leaf;
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@c_snapdir_older = map { $c_rel_id{$_->{node}{id}} // get_best_correlated($droot, $_, %gbc_opts) // () } @sbdl_older;
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@c_snapdir_newer = map { $c_rel_id{$_->{node}{id}} // get_best_correlated($droot, $_, %gbc_opts) // () } @sbdl_newer;
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}
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# get correlated receive targets of candidates, return first matching within $resolve_droot
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my @resolved;
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my @filtered_nodes;
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my %uniq;
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foreach my $cand (@candidate) {
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next if($uniq{$cand->{node}{id}});
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my $correlated_target = get_best_correlated_target($resolve_droot, $cand, push_filtered_nodes => \@filtered_nodes, fallback_all_mountpoints => $target_fallback_all_mountpoints);
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if($correlated_target) {
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TRACE "get_best_parent: common related from root=\"$resolve_droot->{PRINT}\": \"$cand->{PRINT}\", \"$correlated_target->{PRINT}\"";
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push @resolved, [ $cand, $correlated_target ];
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last unless($clone_src);
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}
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$uniq{$cand->{node}{id}} = 1;
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}
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if(scalar @filtered_nodes) {
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WARN "Best common parent for \"$svol->{PRINT}\" is not accessible within target $target_incremental_resolve \"$resolve_droot->{PRINT}\", ignoring: " . join(", ", map('"' . _fs_path($_) . '"',@filtered_nodes));
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if($loglevel >= 4) {
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TRACE "get_best_parent: related reference cgen=$svol->{node}{cgen}";
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TRACE "get_best_parent: related older: $_->[0]{PRINT} (cgen=$_->[0]{node}{cgen})" foreach(@c_related_older);
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TRACE "get_best_parent: related newer: $_->[0]{PRINT} (cgen=$_->[0]{node}{cgen})" foreach(@c_related_newer);
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TRACE "get_best_parent: snapdir older: $_->[0]{PRINT}" foreach(@c_snapdir_older);
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TRACE "get_best_parent: snapdir newer: $_->[0]{PRINT}" foreach(@c_snapdir_newer);
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}
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if(scalar @resolved) {
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DEBUG "Resolved best common parent (" . (scalar @resolved) . " total): " . $resolved[0][0]->{PRINT};
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my $parent = shift @resolved;
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$$clone_src = \@resolved if($clone_src);
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return ($parent->[0], $parent->[1]->{node});
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} else {
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if(scalar @inaccessible_nodes) { # populated by get_best_correlated()
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WARN "Best common parent for \"$svol->{PRINT}\" is not accessible within target $target_incremental_resolve \"$resolve_droot->{PRINT}\", ignoring: " . join(", ", map('"' . _fs_path($_) . '"',@inaccessible_nodes));
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}
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# preferences for parent (and required clone sources):
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# 1. closest older in snapdir (by btrbk timestamp), related
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# 2. closest older related (by cgen)
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# 3. closest newer related (by cgen)
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# 4. closest older in snapdir (by btrbk timestamp)
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# 5. closest newer in snapdir (by btrbk timestamp)
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#
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my @parent;
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if(my $cc = shift @c_related_older) {
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push @parent, $cc; # 2. closest older related (by cgen)
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DEBUG "Resolved best common parent (closest older parent_uuid relationship): $cc->[0]{PRINT}";
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}
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if(my $cc = shift @c_related_newer) {
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DEBUG ((scalar @parent ? "Adding clone source" : "Resolved best common parent") . " (closest newer parent_uuid relationship): $cc->[0]{PRINT}");
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push @parent, $cc; # 3. closest newer related (by cgen)
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}
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if(my $cc = shift @c_snapdir_older) {
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unless(grep { $_->[0]{node}{id} == $cc->[0]{node}{id} } @parent) {
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if($c_rel_id{$cc->[0]{node}{id}}) {
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DEBUG "Resolved best common parent (closest older btrbk timestamp, with parent_uuid relationship): $cc->[0]{PRINT}";
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unshift @parent, $cc; # 1. closest older in snapdir (by btrbk timestamp), related
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}
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else {
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DEBUG ((scalar @parent ? "Adding clone source" : "Resolved best common parent") . " (closest older btrbk timestamp): $cc->[0]{PRINT}");
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push @parent, $cc; # 4. closest older in snapdir (by btrbk timestamp)
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}
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}
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}
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if(my $cc = shift @c_snapdir_newer) {
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unless(grep { $_->[0]{node}{id} == $cc->[0]{node}{id} } @parent) {
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DEBUG ((scalar @parent ? "Adding clone source" : "Resolved best common parent") . " (closest newer btrbk timestamp): $cc->[0]{PRINT}");
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push @parent, $cc; # 5. closest newer in snapdir (by btrbk timestamp)
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}
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}
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# assemble results
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unless(scalar @parent) {
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DEBUG("No common parents of \"$svol->{PRINT}\" found in src=\"$resolve_sroot->{PRINT}/\", target=\"$resolve_droot->{PRINT}/\"");
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return undef;
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}
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my @extra_clones;
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foreach my $cc (@c_related_older, @c_related_newer, grep { not exists($c_rel_id{$_->[0]{node}{id}}) } (@c_snapdir_older, @c_snapdir_newer)) {
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push @extra_clones, $cc->[0] unless(grep { $_->[0]{node}{id} == $cc->[0]{node}{id} } @parent);
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}
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DEBUG "Resolved " . (scalar @extra_clones) . " extra clone sources";
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if($loglevel >= 4) {
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TRACE "get_best_parent: parent,clones: $_->[0]{PRINT}" foreach(@parent);
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TRACE "get_best_parent: extra clone : $_->{PRINT}" foreach(@extra_clones);
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}
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my $ret_parent = shift @parent;
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my @clone_src = map { $_->[0] } @parent;
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$$ret_clone_src = \@clone_src if($ret_clone_src);
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$$ret_clone_src_extra = \@extra_clones if($ret_clone_src_extra);
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$$ret_target_parent_node = $ret_parent->[1]{node} if($ret_target_parent_node);
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return $ret_parent->[0];
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}
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@ -3765,7 +3815,8 @@ sub macro_send_receive(@)
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my $source = $info{source} || die;
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my $target = $info{target} || die;
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my $parent = $info{parent};
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my $clone_src = $info{clone_src}; # arrayref of [ vinfo, correlated_target_node ]
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my @clone_src = @{ $info{clone_src} // [] }; # copy array
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my $clone_src_extra = $info{clone_src_extra} // [];
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my $config_target = $target->{CONFIG};
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die unless($config_target->{CONTEXT} eq "target");
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my $target_type = $config_target->{target_type} || die;
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@ -3796,11 +3847,14 @@ sub macro_send_receive(@)
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ABORTED($config_target, "No common parent subvolume found, and option \"incremental\" is set to \"strict\"");
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return undef;
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}
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# add extra clone_src if "incremental_clones" is set
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my $ic = config_key($target, "incremental_clones");
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push @clone_src, map { --$ic < 0 ? () : $_ } @$clone_src_extra if($ic);
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}
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else {
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INFO "Creating full backup...";
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$parent = undef;
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$clone_src = undef;
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@clone_src = ();
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delete $info{parent};
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}
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@ -3809,7 +3863,7 @@ sub macro_send_receive(@)
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my $raw_info;
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if($target_type eq "send-receive")
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{
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$ret = btrfs_send_receive($source, $target, $parent, $clone_src, \$vol_received);
|
||||
$ret = btrfs_send_receive($source, $target, $parent, \@clone_src, \$vol_received);
|
||||
ABORTED($config_target, "Failed to send/receive subvolume") unless($ret);
|
||||
}
|
||||
elsif($target_type eq "raw")
|
||||
|
|
@ -3967,12 +4021,16 @@ sub macro_archive_target($$$;$)
|
|||
my $archive_success = 0;
|
||||
foreach my $svol (@archive)
|
||||
{
|
||||
my $clone_src;
|
||||
my ($parent, $target_parent_node) = get_best_parent($svol, $sroot, $droot, clone_src => \$clone_src);
|
||||
my ($clone_src, $clone_src_extra, $target_parent_node);
|
||||
my $parent = get_best_parent($svol, $sroot, $droot,
|
||||
clone_src => \$clone_src,
|
||||
clone_src_extra => \$clone_src_extra,
|
||||
target_parent_node => \$target_parent_node);
|
||||
if(macro_send_receive(source => $svol,
|
||||
target => $droot,
|
||||
parent => $parent, # this is <undef> if no suitable parent found
|
||||
clone_src => $clone_src,
|
||||
clone_src_extra => $clone_src_extra,
|
||||
target_parent_node => $target_parent_node,
|
||||
))
|
||||
{
|
||||
|
|
@ -6097,12 +6155,16 @@ MAIN:
|
|||
}
|
||||
|
||||
INFO "Creating subvolume backup (send-receive) for: $child->{PRINT}";
|
||||
my $clone_src;
|
||||
my ($parent, $target_parent_node) = get_best_parent($child, $snaproot, $droot, clone_src => \$clone_src);
|
||||
my ($clone_src, $clone_src_extra, $target_parent_node);
|
||||
my $parent = get_best_parent($child, $snaproot, $droot,
|
||||
clone_src => \$clone_src,
|
||||
clone_src_extra => \$clone_src_extra,
|
||||
target_parent_node => \$target_parent_node);
|
||||
if(macro_send_receive(source => $child,
|
||||
target => $droot,
|
||||
parent => $parent, # this is <undef> if no suitable parent found
|
||||
clone_src => $clone_src,
|
||||
clone_src_extra => $clone_src_extra,
|
||||
target_parent_node => $target_parent_node,
|
||||
))
|
||||
{
|
||||
|
|
|
|||
Loading…
Reference in New Issue