# Storage API version. Icrement it on changes in storage API interface.
use constant APIVER => 2;
+# 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 => 1;
# load standard plugins
PVE::Storage::DirPlugin->register();
eval {
require $file;
+
+ # Check perl interface:
+ die "not derived from PVE::Storage::Plugin\n"
+ if !$modname->isa('PVE::Storage::Plugin');
+ die "does not provide an api() method\n"
+ if !$modname->can('api');
+ # Check storage API version and that file is really storage plugin.
+ my $version = $modname->api();
+ die "implements an API version newer than current\n"
+ if $version > APIVER;
+ die "API version too old, pluse update the plugin\n"
+ if $version < (APIVER-APIAGE);
+ import $file;
+ $modname->register();
+
+ # If we got this far and the API version is not the same, make some
+ # noise:
+ warn "Plugin \"$modname\" is implementing an older storage API, an upgrade is recommended\n"
+ if $version != APIVER;
};
if ($@) {
- warn $@;
- # Check storage API version and that file is really storage plugin.
- } elsif ($modname->isa('PVE::Storage::Plugin') && $modname->can('api') && $modname->api() == APIVER) {
- eval {
- import $file;
- $modname->register();
- };
- warn $@ if $@;
- } else {
- warn "Error loading storage plugin \"$modname\" because of API version mismatch. Please, update it.\n"
+ warn "Error loading storage plugin \"$modname\": $@";
}
});
}