Merge changes from topic "reverse-dns-lookup"

* changes:
  Disable gerrit.enableReverseDnsLookup by default
  Replace gerrit.disableReverseDnsLookup with gerrit.enableReverseDnsLookup
diff --git a/Documentation/config-gerrit.txt b/Documentation/config-gerrit.txt
index 6912e9a9..8479a8e 100644
--- a/Documentation/config-gerrit.txt
+++ b/Documentation/config-gerrit.txt
@@ -2015,11 +2015,16 @@
 +
 Defaults to "Report Bug".
 
-[[gerrit.disableReverseDnsLookup]]gerrit.disableReverseDnsLookup::
+[[gerrit.enableReverseDnsLookup]]gerrit.enableReverseDnsLookup::
 +
-Disables reverse DNS lookup during computing ref log entry for identified user.
+Enable reverse DNS lookup during computing ref log entry for identified user,
+to record the actual hostname of the user's host in the ref log.
 +
-Defaults to false.
+Enabling reverse DNS lookup can cause performance issues on git push when
+the reverse DNS lookup is slow.
++
+Defaults to false, reverse DNS lookup is disabled. The user's IP address
+will be recorded in the ref log rather than their hostname.
 
 [[gerrit.secureStoreClass]]gerrit.secureStoreClass::
 +
diff --git a/java/com/google/gerrit/pgm/util/BatchProgramModule.java b/java/com/google/gerrit/pgm/util/BatchProgramModule.java
index b0c1c25..2087104 100644
--- a/java/com/google/gerrit/pgm/util/BatchProgramModule.java
+++ b/java/com/google/gerrit/pgm/util/BatchProgramModule.java
@@ -48,8 +48,8 @@
 import com.google.gerrit.server.config.CanonicalWebUrl;
 import com.google.gerrit.server.config.CanonicalWebUrlProvider;
 import com.google.gerrit.server.config.DefaultUrlFormatter;
-import com.google.gerrit.server.config.DisableReverseDnsLookup;
-import com.google.gerrit.server.config.DisableReverseDnsLookupProvider;
+import com.google.gerrit.server.config.EnableReverseDnsLookup;
+import com.google.gerrit.server.config.EnableReverseDnsLookupProvider;
 import com.google.gerrit.server.config.GitReceivePackGroups;
 import com.google.gerrit.server.config.GitUploadPackGroups;
 import com.google.gerrit.server.config.SysExecutorModule;
@@ -120,8 +120,8 @@
         .annotatedWith(CanonicalWebUrl.class)
         .toProvider(CanonicalWebUrlProvider.class);
     bind(Boolean.class)
-        .annotatedWith(DisableReverseDnsLookup.class)
-        .toProvider(DisableReverseDnsLookupProvider.class)
+        .annotatedWith(EnableReverseDnsLookup.class)
+        .toProvider(EnableReverseDnsLookupProvider.class)
         .in(SINGLETON);
     bind(Realm.class).to(FakeRealm.class);
     bind(IdentifiedUser.class).toProvider(Providers.of(null));
diff --git a/java/com/google/gerrit/server/IdentifiedUser.java b/java/com/google/gerrit/server/IdentifiedUser.java
index e5e0cad..e65f562 100644
--- a/java/com/google/gerrit/server/IdentifiedUser.java
+++ b/java/com/google/gerrit/server/IdentifiedUser.java
@@ -32,7 +32,7 @@
 import com.google.gerrit.server.config.AnonymousCowardName;
 import com.google.gerrit.server.config.AuthConfig;
 import com.google.gerrit.server.config.CanonicalWebUrl;
-import com.google.gerrit.server.config.DisableReverseDnsLookup;
+import com.google.gerrit.server.config.EnableReverseDnsLookup;
 import com.google.gerrit.server.group.SystemGroupBackend;
 import com.google.inject.Inject;
 import com.google.inject.OutOfScopeException;
@@ -67,7 +67,7 @@
     private final Provider<String> canonicalUrl;
     private final AccountCache accountCache;
     private final GroupBackend groupBackend;
-    private final Boolean disableReverseDnsLookup;
+    private final Boolean enableReverseDnsLookup;
 
     @Inject
     public GenericFactory(
@@ -75,7 +75,7 @@
         Realm realm,
         @AnonymousCowardName String anonymousCowardName,
         @CanonicalWebUrl Provider<String> canonicalUrl,
-        @DisableReverseDnsLookup Boolean disableReverseDnsLookup,
+        @EnableReverseDnsLookup Boolean enableReverseDnsLookup,
         AccountCache accountCache,
         GroupBackend groupBackend) {
       this.authConfig = authConfig;
@@ -84,7 +84,7 @@
       this.canonicalUrl = canonicalUrl;
       this.accountCache = accountCache;
       this.groupBackend = groupBackend;
-      this.disableReverseDnsLookup = disableReverseDnsLookup;
+      this.enableReverseDnsLookup = enableReverseDnsLookup;
     }
 
     public IdentifiedUser create(AccountState state) {
@@ -95,7 +95,7 @@
           canonicalUrl,
           accountCache,
           groupBackend,
-          disableReverseDnsLookup,
+          enableReverseDnsLookup,
           Providers.of(null),
           state,
           null);
@@ -118,7 +118,7 @@
           canonicalUrl,
           accountCache,
           groupBackend,
-          disableReverseDnsLookup,
+          enableReverseDnsLookup,
           Providers.of(remotePeer),
           id,
           caller);
@@ -139,7 +139,7 @@
     private final Provider<String> canonicalUrl;
     private final AccountCache accountCache;
     private final GroupBackend groupBackend;
-    private final Boolean disableReverseDnsLookup;
+    private final Boolean enableReverseDnsLookup;
     private final Provider<SocketAddress> remotePeerProvider;
 
     @Inject
@@ -150,7 +150,7 @@
         @CanonicalWebUrl Provider<String> canonicalUrl,
         AccountCache accountCache,
         GroupBackend groupBackend,
-        @DisableReverseDnsLookup Boolean disableReverseDnsLookup,
+        @EnableReverseDnsLookup Boolean enableReverseDnsLookup,
         @RemotePeer Provider<SocketAddress> remotePeerProvider) {
       this.authConfig = authConfig;
       this.realm = realm;
@@ -158,7 +158,7 @@
       this.canonicalUrl = canonicalUrl;
       this.accountCache = accountCache;
       this.groupBackend = groupBackend;
-      this.disableReverseDnsLookup = disableReverseDnsLookup;
+      this.enableReverseDnsLookup = enableReverseDnsLookup;
       this.remotePeerProvider = remotePeerProvider;
     }
 
@@ -170,7 +170,7 @@
           canonicalUrl,
           accountCache,
           groupBackend,
-          disableReverseDnsLookup,
+          enableReverseDnsLookup,
           remotePeerProvider,
           id,
           null);
@@ -184,7 +184,7 @@
           canonicalUrl,
           accountCache,
           groupBackend,
-          disableReverseDnsLookup,
+          enableReverseDnsLookup,
           remotePeerProvider,
           id,
           caller);
@@ -201,7 +201,7 @@
   private final Realm realm;
   private final GroupBackend groupBackend;
   private final String anonymousCowardName;
-  private final Boolean disableReverseDnsLookup;
+  private final Boolean enableReverseDnsLookup;
   private final Set<String> validEmails = Sets.newTreeSet(String.CASE_INSENSITIVE_ORDER);
   private final CurrentUser realUser; // Must be final since cached properties depend on it.
 
@@ -221,7 +221,7 @@
       Provider<String> canonicalUrl,
       AccountCache accountCache,
       GroupBackend groupBackend,
-      Boolean disableReverseDnsLookup,
+      Boolean enableReverseDnsLookup,
       @Nullable Provider<SocketAddress> remotePeerProvider,
       AccountState state,
       @Nullable CurrentUser realUser) {
@@ -232,7 +232,7 @@
         canonicalUrl,
         accountCache,
         groupBackend,
-        disableReverseDnsLookup,
+        enableReverseDnsLookup,
         remotePeerProvider,
         state.getAccount().getId(),
         realUser);
@@ -246,7 +246,7 @@
       Provider<String> canonicalUrl,
       AccountCache accountCache,
       GroupBackend groupBackend,
-      Boolean disableReverseDnsLookup,
+      Boolean enableReverseDnsLookup,
       @Nullable Provider<SocketAddress> remotePeerProvider,
       Account.Id id,
       @Nullable CurrentUser realUser) {
@@ -256,7 +256,7 @@
     this.authConfig = authConfig;
     this.realm = realm;
     this.anonymousCowardName = anonymousCowardName;
-    this.disableReverseDnsLookup = disableReverseDnsLookup;
+    this.enableReverseDnsLookup = enableReverseDnsLookup;
     this.remotePeerProvider = remotePeerProvider;
     this.accountId = id;
     this.realUser = realUser != null ? realUser : this;
@@ -523,7 +523,7 @@
         Providers.of(canonicalUrl.get()),
         accountCache,
         groupBackend,
-        disableReverseDnsLookup,
+        enableReverseDnsLookup,
         remotePeer,
         state,
         realUser);
@@ -554,7 +554,7 @@
   }
 
   private String getHost(InetAddress in) {
-    if (Boolean.FALSE.equals(disableReverseDnsLookup)) {
+    if (Boolean.TRUE.equals(enableReverseDnsLookup)) {
       return in.getCanonicalHostName();
     }
     return in.getHostAddress();
diff --git a/java/com/google/gerrit/server/config/DisableReverseDnsLookup.java b/java/com/google/gerrit/server/config/EnableReverseDnsLookup.java
similarity index 94%
rename from java/com/google/gerrit/server/config/DisableReverseDnsLookup.java
rename to java/com/google/gerrit/server/config/EnableReverseDnsLookup.java
index 336edeb..ec57338 100644
--- a/java/com/google/gerrit/server/config/DisableReverseDnsLookup.java
+++ b/java/com/google/gerrit/server/config/EnableReverseDnsLookup.java
@@ -21,4 +21,4 @@
 
 @Retention(RUNTIME)
 @BindingAnnotation
-public @interface DisableReverseDnsLookup {}
+public @interface EnableReverseDnsLookup {}
diff --git a/java/com/google/gerrit/server/config/DisableReverseDnsLookupProvider.java b/java/com/google/gerrit/server/config/EnableReverseDnsLookupProvider.java
similarity index 71%
rename from java/com/google/gerrit/server/config/DisableReverseDnsLookupProvider.java
rename to java/com/google/gerrit/server/config/EnableReverseDnsLookupProvider.java
index 87d6bac2..71086a9 100644
--- a/java/com/google/gerrit/server/config/DisableReverseDnsLookupProvider.java
+++ b/java/com/google/gerrit/server/config/EnableReverseDnsLookupProvider.java
@@ -18,16 +18,16 @@
 import com.google.inject.Provider;
 import org.eclipse.jgit.lib.Config;
 
-public class DisableReverseDnsLookupProvider implements Provider<Boolean> {
-  private final boolean disableReverseDnsLookup;
+public class EnableReverseDnsLookupProvider implements Provider<Boolean> {
+  private final Boolean enableReverseDnsLookup;
 
   @Inject
-  DisableReverseDnsLookupProvider(@GerritServerConfig Config config) {
-    disableReverseDnsLookup = config.getBoolean("gerrit", null, "disableReverseDnsLookup", false);
+  EnableReverseDnsLookupProvider(@GerritServerConfig Config config) {
+    enableReverseDnsLookup = config.getBoolean("gerrit", null, "enableReverseDnsLookup", false);
   }
 
   @Override
   public Boolean get() {
-    return disableReverseDnsLookup;
+    return enableReverseDnsLookup;
   }
 }
diff --git a/java/com/google/gerrit/server/config/GerritGlobalModule.java b/java/com/google/gerrit/server/config/GerritGlobalModule.java
index 9650ac2..4158346 100644
--- a/java/com/google/gerrit/server/config/GerritGlobalModule.java
+++ b/java/com/google/gerrit/server/config/GerritGlobalModule.java
@@ -295,8 +295,8 @@
     bind(SoyTofu.class).annotatedWith(MailTemplates.class).toProvider(MailSoyTofuProvider.class);
     bind(FromAddressGenerator.class).toProvider(FromAddressGeneratorProvider.class).in(SINGLETON);
     bind(Boolean.class)
-        .annotatedWith(DisableReverseDnsLookup.class)
-        .toProvider(DisableReverseDnsLookupProvider.class)
+        .annotatedWith(EnableReverseDnsLookup.class)
+        .toProvider(EnableReverseDnsLookupProvider.class)
         .in(SINGLETON);
 
     bind(PatchSetInfoFactory.class);
diff --git a/javatests/com/google/gerrit/acceptance/rest/account/EmailIT.java b/javatests/com/google/gerrit/acceptance/rest/account/EmailIT.java
index 9749d67..0bdb4e4 100644
--- a/javatests/com/google/gerrit/acceptance/rest/account/EmailIT.java
+++ b/javatests/com/google/gerrit/acceptance/rest/account/EmailIT.java
@@ -43,7 +43,7 @@
 import com.google.gerrit.server.config.AnonymousCowardName;
 import com.google.gerrit.server.config.AuthConfig;
 import com.google.gerrit.server.config.CanonicalWebUrl;
-import com.google.gerrit.server.config.DisableReverseDnsLookup;
+import com.google.gerrit.server.config.EnableReverseDnsLookup;
 import com.google.gson.reflect.TypeToken;
 import com.google.inject.Inject;
 import com.google.inject.Provider;
@@ -55,7 +55,7 @@
 public class EmailIT extends AbstractDaemonTest {
   @Inject private @AnonymousCowardName String anonymousCowardName;
   @Inject private @CanonicalWebUrl Provider<String> canonicalUrl;
-  @Inject private @DisableReverseDnsLookup Boolean disableReverseDnsLookup;
+  @Inject private @EnableReverseDnsLookup boolean enableReverseDnsLookup;
   @Inject private @ServerInitiated Provider<AccountsUpdate> accountsUpdateProvider;
   @Inject private AuthConfig authConfig;
   @Inject private EmailExpander emailExpander;
@@ -275,7 +275,7 @@
             realm,
             anonymousCowardName,
             canonicalUrl,
-            disableReverseDnsLookup,
+            enableReverseDnsLookup,
             accountCache,
             groupBackend);
     return atrScope.set(atrScope.newContext(null, userFactory.create(admin.id)));
diff --git a/javatests/com/google/gerrit/server/IdentifiedUserTest.java b/javatests/com/google/gerrit/server/IdentifiedUserTest.java
index a8daac3..485de49 100644
--- a/javatests/com/google/gerrit/server/IdentifiedUserTest.java
+++ b/javatests/com/google/gerrit/server/IdentifiedUserTest.java
@@ -25,7 +25,7 @@
 import com.google.gerrit.server.config.AnonymousCowardName;
 import com.google.gerrit.server.config.AnonymousCowardNameProvider;
 import com.google.gerrit.server.config.CanonicalWebUrl;
-import com.google.gerrit.server.config.DisableReverseDnsLookup;
+import com.google.gerrit.server.config.EnableReverseDnsLookup;
 import com.google.gerrit.server.config.GerritServerConfig;
 import com.google.gerrit.server.group.SystemGroupBackend;
 import com.google.gerrit.server.util.time.TimeUtil;
@@ -81,8 +81,8 @@
           @Override
           protected void configure() {
             bind(Boolean.class)
-                .annotatedWith(DisableReverseDnsLookup.class)
-                .toInstance(Boolean.FALSE);
+                .annotatedWith(EnableReverseDnsLookup.class)
+                .toInstance(Boolean.TRUE);
             bind(Config.class).annotatedWith(GerritServerConfig.class).toInstance(config);
             bind(String.class)
                 .annotatedWith(AnonymousCowardName.class)
diff --git a/javatests/com/google/gerrit/server/notedb/AbstractChangeNotesTest.java b/javatests/com/google/gerrit/server/notedb/AbstractChangeNotesTest.java
index be523d8..712449e 100644
--- a/javatests/com/google/gerrit/server/notedb/AbstractChangeNotesTest.java
+++ b/javatests/com/google/gerrit/server/notedb/AbstractChangeNotesTest.java
@@ -42,7 +42,7 @@
 import com.google.gerrit.server.config.AnonymousCowardNameProvider;
 import com.google.gerrit.server.config.CanonicalWebUrl;
 import com.google.gerrit.server.config.DefaultUrlFormatter;
-import com.google.gerrit.server.config.DisableReverseDnsLookup;
+import com.google.gerrit.server.config.EnableReverseDnsLookup;
 import com.google.gerrit.server.config.GerritServerConfig;
 import com.google.gerrit.server.config.GerritServerId;
 import com.google.gerrit.server.extensions.events.GitReferenceUpdated;
@@ -147,8 +147,8 @@
                     .annotatedWith(CanonicalWebUrl.class)
                     .toInstance("http://localhost:8080/");
                 bind(Boolean.class)
-                    .annotatedWith(DisableReverseDnsLookup.class)
-                    .toInstance(Boolean.FALSE);
+                    .annotatedWith(EnableReverseDnsLookup.class)
+                    .toInstance(Boolean.TRUE);
                 bind(Realm.class).to(FakeRealm.class);
                 bind(GroupBackend.class).to(SystemGroupBackend.class).in(SINGLETON);
                 bind(AccountCache.class).toInstance(accountCache);