Adds a config file for directories by using a 'map' property string for
each node mapping.
Next to node & path, there is the optional announce-submounts parameter
which forces virtiofsd to report a different device number for each
submount it encounters. Without it, duplicates may be created because
inode IDs are only unique on a single filesystem.
example config:
```
some-dir-id
map node=node1,path=/mnt/share/,announce-submounts=1
map node=node2,path=/mnt/share/,
```
Signed-off-by: Markus Frank <m.fr...@proxmox.com>
---
src/Makefile | 1 +
src/PVE/Mapping/Dir.pm | 185 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 186 insertions(+)
create mode 100644 src/PVE/Mapping/Dir.pm
diff --git a/src/Makefile b/src/Makefile
index cbc40c1..030e7f7 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -15,6 +15,7 @@ install: PVE
install -m 0644 PVE/StorageTunnel.pm ${PERL5DIR}/PVE/
install -m 0644 PVE/Tunnel.pm ${PERL5DIR}/PVE/
install -d ${PERL5DIR}/PVE/Mapping
+ install -m 0644 PVE/Mapping/Dir.pm ${PERL5DIR}/PVE/Mapping/
install -m 0644 PVE/Mapping/PCI.pm ${PERL5DIR}/PVE/Mapping/
install -m 0644 PVE/Mapping/USB.pm ${PERL5DIR}/PVE/Mapping/
install -d ${PERL5DIR}/PVE/VZDump
diff --git a/src/PVE/Mapping/Dir.pm b/src/PVE/Mapping/Dir.pm
new file mode 100644
index 0000000..e6e2237
--- /dev/null
+++ b/src/PVE/Mapping/Dir.pm
@@ -0,0 +1,185 @@
+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::INotify;
+use PVE::JSONSchema qw(get_standard_option parse_property_string);
+use PVE::SectionConfig;
+
+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 => "Absolute directory path that should be shared with the
guest.",
+ type => 'string',
+ format => 'pve-storage-path',
+ },
+ 'announce-submounts' => {
+ type => 'boolean',
+ description => "Announce that the directory contains other mounted file
systems."
+ ." If this is not set and multiple file systems are mounted, the
guest may"
+ ." encounter duplicates due to file system specific inode IDs.",
+ optional => 1,
+ default => 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 => {
+ type => 'string',
+ description => "Description of the directory",
+ 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 map_fmt {
+ return $map_fmt;
+}
+
+sub options {
+ return {
+ description => { optional => 1 },
+ map => {},
+ };
+}
+
+sub assert_valid {
+ my ($dir_cfg) = @_;
+
+ my $path = $dir_cfg->{path};
+
+ if (! -e $path) {
+ die "Path $path does not exist\n";
+ } elsif (! -d $path) {
+ die "Path $path exists, but is not a directory\n";
+ }
+
+ return 1;
+};
+
+sub assert_no_duplicate_node {
+ my ($map_list) = @_;
+
+ my %count;
+ for my $map (@$map_list) {
+ my $entry = parse_property_string($map_fmt, $map);
+ $count{$entry->{node}}++;
+ }
+ for my $node (keys %count) {
+ if ($count{$node} > 1) {
+ die "Node '$node' is specified $count{$node} times.\n";
+ }
+ }
+}
+
+sub config {
+ return cfs_read_file($FILENAME);
+}
+
+sub lock_dir_config {
+ my ($code, $errmsg) = @_;
+
+ cfs_lock_file($FILENAME, undef, $code);
+ if (my $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};
+ for 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;
--
2.39.5
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