dajac commented on a change in pull request #9628:
URL: https://github.com/apache/kafka/pull/9628#discussion_r537615920



##########
File path: core/src/main/scala/kafka/server/AdminManager.scala
##########
@@ -920,32 +954,51 @@ class AdminManager(val config: KafkaConfig,
         !name.isDefined || !strict
     }
 
-    def fromProps(props: Map[String, String]): Map[String, Double] = {
-      props.map { case (key, value) =>
-        val doubleValue = try value.toDouble catch {
-          case _: NumberFormatException =>
-            throw new IllegalStateException(s"Unexpected client quota 
configuration value: $key -> $value")
-        }
-        key -> doubleValue
-      }
-    }
-
-    (userEntries ++ clientIdEntries ++ bothEntries).map { case ((u, c), p) =>
+    (userEntries ++ clientIdEntries ++ bothEntries).flatMap { case ((u, c), p) 
=>
       val quotaProps = p.asScala.filter { case (key, _) => 
QuotaConfigs.isQuotaConfig(key) }
       if (quotaProps.nonEmpty && matches(userComponent, u) && 
matches(clientIdComponent, c))
         Some(userClientIdToEntity(u, c) -> fromProps(quotaProps))
       else
         None
-    }.flatten.toMap
+    }.toMap
+  }
+
+  def handleDescribeIpQuotas(ipComponent: Option[ClientQuotaFilterComponent], 
strict: Boolean): Map[ClientQuotaEntity, Map[String, Double]] = {
+    val ip = ipComponent.flatMap(c => toOption(c.`match`))
+    val exactIp = wantExact(ipComponent)
+    val allIps = ipComponent.exists(_.`match` == null) || (ipComponent.isEmpty 
&& !strict)
+    val ipEntries = if (exactIp)
+      Map(Some(ip.get) -> adminZkClient.fetchEntityConfig(ConfigType.Ip, 
sanitized(ip)))
+    else if (allIps)
+      adminZkClient.fetchAllEntityConfigs(ConfigType.Ip).map { case (name, 
props) =>
+        Some(desanitizeEntityName(name)) -> props
+      }
+    else
+      Map.empty
+
+    def ipToQuotaEntity(ip: Option[String]): ClientQuotaEntity = {
+      new ClientQuotaEntity(ip.map(ipName => ClientQuotaEntity.IP -> 
ipName).toMap.asJava)
+    }
+
+    ipEntries.flatMap { case (ip, props) =>
+      val ipQuotaProps = props.asScala.filter { case (key, _) => 
DynamicConfig.Ip.names.contains(key) }
+      if (ipQuotaProps.nonEmpty)
+        Some(ipToQuotaEntity(ip) -> fromProps(ipQuotaProps))
+      else
+        None
+    }
   }
 
   def alterClientQuotas(entries: Seq[ClientQuotaAlteration], validateOnly: 
Boolean): Map[ClientQuotaEntity, ApiError] = {
     def alterEntityQuotas(entity: ClientQuotaEntity, ops: 
Iterable[ClientQuotaAlteration.Op]): Unit = {
-      val (path, configType, configKeys) = 
entityToSanitizedUserClientId(entity) match {
-        case (Some(user), Some(clientId)) => (user + "/clients/" + clientId, 
ConfigType.User, DynamicConfig.User.configKeys)
-        case (Some(user), None) => (user, ConfigType.User, 
DynamicConfig.User.configKeys)
-        case (None, Some(clientId)) => (clientId, ConfigType.Client, 
DynamicConfig.Client.configKeys)
-        case _ => throw new InvalidRequestException("Invalid empty client 
quota entity")
+      val (path, configType, configKeys) = parseAndSanitizeQuotaEntity(entity) 
match {
+        case (Some(user), Some(clientId), None) => (user + "/clients/" + 
clientId, ConfigType.User, DynamicConfig.User.configKeys)
+        case (Some(user), None, None) => (user, ConfigType.User, 
DynamicConfig.User.configKeys)
+        case (None, Some(clientId), None) => (clientId, ConfigType.Client, 
DynamicConfig.Client.configKeys)
+        case (None, None, Some(ip)) => (ip, ConfigType.Ip, 
DynamicConfig.Ip.configKeys)
+        case (_, _, Some(_)) => throw new InvalidRequestException(s"Invalid 
quota entity combination, " +

Review comment:
       Thanks for the explanation. That makes sense.




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