config: allow matching on client tag

jay-config/src/_private.rs

@@ -99,6 +99,7 @@ pub enum ClientCriterionStringField {
     SandboxInstanceId,
     Comm,
     Exe,
+    Tag,
 }
 
 #[derive(Serialize, Deserialize, Clone, Debug, Hash, Eq, PartialEq)]

jay-config/src/_private/client.rs

@@ -1764,6 +1764,8 @@ impl ConfigClient {
             ClientCriterion::CommRegex(t) => string!(t, Comm, true),
             ClientCriterion::Exe(t) => string!(t, Exe, false),
             ClientCriterion::ExeRegex(t) => string!(t, Exe, true),
+            ClientCriterion::Tag(t) => string!(t, Tag, false),
+            ClientCriterion::TagRegex(t) => string!(t, Tag, true),
         };
         let res = self.send_with_response(&ClientMessage::CreateClientMatcher { criterion });
         get_response!(

jay-config/src/client.rs

@@ -91,6 +91,10 @@ pub enum ClientCriterion<'a> {
     Exe(&'a str),
     /// Matches the `/proc/pid/exe` of the client with a regular expression.
     ExeRegex(&'a str),
+    /// Matches the tag of the client verbatim.
+    Tag(&'a str),
+    /// Matches the tag of the client with a regular expression.
+    TagRegex(&'a str),
 }
 
 impl ClientCriterion<'_> {