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89d51d5f29
Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable. It should be noted that this decision does not promise all future exploits will be configurable.
58 lines
3.7 KiB
Diff
58 lines
3.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
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Date: Wed, 18 Nov 2020 20:52:25 -0800
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Subject: [PATCH] Entity load/save limit per chunk
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Adds a config option to limit the number of entities saved and loaded
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to a chunk. The default values of -1 disable the limit. Although
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defaults are only included for certain entites, this allows setting
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limits for any entity type.
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diff --git a/src/main/java/net/minecraft/world/entity/EntityType.java b/src/main/java/net/minecraft/world/entity/EntityType.java
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index 69bdf3f2ee731e59e8d454816a9ca72cb49c0fe0..09e8445a3f8c6b3ebc852a75a9a25b41a51ba659 100644
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--- a/src/main/java/net/minecraft/world/entity/EntityType.java
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+++ b/src/main/java/net/minecraft/world/entity/EntityType.java
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@@ -640,9 +640,20 @@ public class EntityType<T extends Entity> implements FeatureElement, EntityTypeT
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final Spliterator<? extends Tag> spliterator = entityNbtList.spliterator();
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return StreamSupport.stream(new Spliterator<Entity>() {
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+ final java.util.Map<EntityType<?>, Integer> loadedEntityCounts = new java.util.HashMap<>(); // Paper - Entity load/save limit per chunk
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public boolean tryAdvance(Consumer<? super Entity> consumer) {
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return spliterator.tryAdvance((nbtbase) -> {
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EntityType.loadEntityRecursive((CompoundTag) nbtbase, world, (entity) -> {
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+ // Paper start - Entity load/save limit per chunk
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+ final EntityType<?> entityType = entity.getType();
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+ final int saveLimit = world.paperConfig().chunks.entityPerChunkSaveLimit.getOrDefault(entityType, -1);
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+ if (saveLimit > -1) {
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+ if (this.loadedEntityCounts.getOrDefault(entityType, 0) >= saveLimit) {
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+ return null;
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+ }
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+ this.loadedEntityCounts.merge(entityType, 1, Integer::sum);
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+ }
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+ // Paper end - Entity load/save limit per chunk
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consumer.accept(entity);
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return entity;
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});
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diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java
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index 0ec0be22f7292d57c40da6f1f4575bdebf8dbd09..23dc37ff1f92951817864963bf93220d5aae91bb 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java
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@@ -110,7 +110,18 @@ public class EntityStorage implements EntityPersistentStorage<Entity> {
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}
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ListTag listTag = new ListTag();
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+ final java.util.Map<net.minecraft.world.entity.EntityType<?>, Integer> savedEntityCounts = new java.util.HashMap<>(); // Paper - Entity load/save limit per chunk
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entities.forEach((entity) -> { // diff here: use entities parameter
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+ // Paper start - Entity load/save limit per chunk
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+ final EntityType<?> entityType = entity.getType();
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+ final int saveLimit = level.paperConfig().chunks.entityPerChunkSaveLimit.getOrDefault(entityType, -1);
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+ if (saveLimit > -1) {
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+ if (savedEntityCounts.getOrDefault(entityType, 0) >= saveLimit) {
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+ return;
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+ }
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+ savedEntityCounts.merge(entityType, 1, Integer::sum);
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+ }
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+ // Paper end - Entity load/save limit per chunk
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CompoundTag compoundTag = new CompoundTag();
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if (entity.save(compoundTag)) {
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listTag.add(compoundTag);
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