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From: Markus Frank <m.frank@proxmox.com>
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Date: Thu, 6 Jul 2023 12:54:12 +0200
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Subject: [pve-devel] [PATCH guest-common v6 1/1] add DIR mapping config
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adds a config file for directories by using a 'map'
array propertystring for each node mapping.
next to node & path, there are xattr, acl & submounts parameters for
virtiofsd in the map array.
example config:
```
some-dir-id
map node=node1,path=/mnt/share/,xattr=1,acl=1,submounts=1
map node=node2,path=/mnt/share/,xattr=1
map node=node3,path=/mnt/share/,submounts=1
map node=node4,path=/mnt/share/
```
Signed-off-by: Markus Frank <m.frank@proxmox.com>
---
src/Makefile | 1 +
src/PVE/Mapping/DIR.pm | 175 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 176 insertions(+)
create mode 100644 src/PVE/Mapping/DIR.pm
diff --git a/src/Makefile b/src/Makefile
index cbc40c1..876829a 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -17,6 +17,7 @@ install: PVE
install -d ${PERL5DIR}/PVE/Mapping
install -m 0644 PVE/Mapping/PCI.pm ${PERL5DIR}/PVE/Mapping/
install -m 0644 PVE/Mapping/USB.pm ${PERL5DIR}/PVE/Mapping/
+ install -m 0644 PVE/Mapping/DIR.pm ${PERL5DIR}/PVE/Mapping/
install -d ${PERL5DIR}/PVE/VZDump
install -m 0644 PVE/VZDump/Plugin.pm ${PERL5DIR}/PVE/VZDump/
install -m 0644 PVE/VZDump/Common.pm ${PERL5DIR}/PVE/VZDump/
diff --git a/src/PVE/Mapping/DIR.pm b/src/PVE/Mapping/DIR.pm
new file mode 100644
index 0000000..a5da042
--- /dev/null
+++ b/src/PVE/Mapping/DIR.pm
@@ -0,0 +1,175 @@
+package PVE::Mapping::DIR;
+
+use strict;
+use warnings;
+
+use PVE::Cluster qw(cfs_register_file cfs_read_file cfs_lock_file cfs_write_file);
+use PVE::JSONSchema qw(get_standard_option parse_property_string);
+use PVE::SectionConfig;
+use PVE::INotify;
+
+use base qw(PVE::SectionConfig);
+
+my $FILENAME = 'mapping/dir.cfg';
+
+cfs_register_file($FILENAME,
+ sub { __PACKAGE__->parse_config(@_); },
+ sub { __PACKAGE__->write_config(@_); });
+
+
+# so we don't have to repeat the type every time
+sub parse_section_header {
+ my ($class, $line) = @_;
+
+ if ($line =~ m/^(\S+)\s*$/) {
+ my $id = $1;
+ my $errmsg = undef; # set if you want to skip whole section
+ eval { PVE::JSONSchema::pve_verify_configid($id) };
+ $errmsg = $@ if $@;
+ my $config = {}; # to return additional attributes
+ return ('dir', $id, $errmsg, $config);
+ }
+ return undef;
+}
+
+sub format_section_header {
+ my ($class, $type, $sectionId, $scfg, $done_hash) = @_;
+
+ return "$sectionId\n";
+}
+
+sub type {
+ return 'dir';
+}
+
+my $map_fmt = {
+ node => get_standard_option('pve-node'),
+ path => {
+ description => "Directory-path that should be shared with the guest.",
+ type => 'string',
+ format => 'pve-storage-path',
+ },
+ xattr => {
+ type => 'boolean',
+ description => "Enable support for extended attributes (xattrs).",
+ optional => 1,
+ },
+ acl => {
+ type => 'boolean',
+ description => "Enable support for posix ACLs (implies --xattr).",
+ optional => 1,
+ },
+ submounts => {
+ type => 'boolean',
+ description => "Option to tell the guest which directories are mount points.",
+ optional => 1,
+ },
+ description => {
+ description => "Description of the node specific directory.",
+ type => 'string',
+ optional => 1,
+ maxLength => 4096,
+ },
+};
+
+my $defaultData = {
+ propertyList => {
+ id => {
+ type => 'string',
+ description => "The ID of the directory",
+ format => 'pve-configid',
+ },
+ description => {
+ description => "Description of the directory",
+ type => 'string',
+ optional => 1,
+ maxLength => 4096,
+ },
+ map => {
+ type => 'array',
+ description => 'A list of maps for the cluster nodes.',
+ optional => 1,
+ items => {
+ type => 'string',
+ format => $map_fmt,
+ },
+ },
+ },
+};
+
+sub private {
+ return $defaultData;
+}
+
+sub options {
+ return {
+ description => { optional => 1 },
+ map => {},
+ };
+}
+
+sub assert_valid {
+ my ($dir_cfg) = @_;
+
+ my $path = $dir_cfg->{path};
+
+ if (! -e $path) {
+ die "Path $path does not exist\n";
+ }
+ if ((-e $path) && (! -d $path)) {
+ die "Path $path exists but is not a directory\n"
+ }
+
+ return 1;
+};
+
+sub config {
+ return cfs_read_file($FILENAME);
+}
+
+sub lock_dir_config {
+ my ($code, $errmsg) = @_;
+
+ cfs_lock_file($FILENAME, undef, $code);
+ my $err = $@;
+ if ($err) {
+ $errmsg ? die "$errmsg: $err" : die $err;
+ }
+}
+
+sub write_dir_config {
+ my ($cfg) = @_;
+
+ cfs_write_file($FILENAME, $cfg);
+}
+
+sub find_on_current_node {
+ my ($id) = @_;
+
+ my $cfg = config();
+ my $node = PVE::INotify::nodename();
+
+ return get_node_mapping($cfg, $id, $node);
+}
+
+sub get_node_mapping {
+ my ($cfg, $id, $nodename) = @_;
+
+ return undef if !defined($cfg->{ids}->{$id});
+
+ my $res = [];
+ my $mapping_list = $cfg->{ids}->{$id}->{map};
+ foreach my $map (@{$mapping_list}) {
+ my $entry = eval { parse_property_string($map_fmt, $map) };
+ warn $@ if $@;
+ if ($entry && $entry->{node} eq $nodename) {
+ push $res->@*, $entry;
+ }
+ }
+ return $res;
+}
+
+PVE::Mapping::DIR->register();
+PVE::Mapping::DIR->init();
+
+1;
--
2.39.2