mirror of
https://github.com/PaperMC/Paper.git
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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.
382 lines
20 KiB
Diff
382 lines
20 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Thu, 20 May 2021 07:02:22 -0700
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Subject: [PATCH] Fix and optimise world force upgrading
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The WorldUpgrader class was incorrectly modified by
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CB. It will store an IChunkLoader instance for all
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dimension types in the world, but obviously with how
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CB shifts around worlds only one dimension type exists
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per world. But this would be OK if CB did this
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change correctly. All IChunkLoader instances
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will point to the same regionfiles. And all
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IChunkLoader instances are going to be read from.
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This problem hasn't really been reported because
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it relies on the persistent legacy data to be converted
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as well to cause corruption. Why? Because the legacy
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data is also shared, it will result in different
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outputs from conversion (as once conversion for legacy
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persistent data takes place, it is REMOVED - so the next
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convert will _not_ have the data). Which means different
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sizes on disk. Which means different regionfile sector
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allocations. Which means there are 3 different possible
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regionfile sector allocations in memory, and none of them
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are going to be correct.
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I've fixed this by writing a world upgrader suited to
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CB's changes to world folder format. It was brain dead
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easy to add threading, so I did.
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== AT ==
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public net.minecraft.util.worldupdate.WorldUpgrader REGEX
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diff --git a/src/main/java/io/papermc/paper/world/ThreadedWorldUpgrader.java b/src/main/java/io/papermc/paper/world/ThreadedWorldUpgrader.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..513833c2ea23df5b079d157bc5cb89d5c9754c0b
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--- /dev/null
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+++ b/src/main/java/io/papermc/paper/world/ThreadedWorldUpgrader.java
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@@ -0,0 +1,209 @@
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+package io.papermc.paper.world;
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+
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+import com.mojang.datafixers.DataFixer;
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+import com.mojang.serialization.Codec;
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+import net.minecraft.SharedConstants;
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+import net.minecraft.nbt.CompoundTag;
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+import net.minecraft.resources.ResourceKey;
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+import net.minecraft.util.worldupdate.WorldUpgrader;
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+import net.minecraft.world.level.ChunkPos;
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+import net.minecraft.world.level.Level;
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+import net.minecraft.world.level.chunk.ChunkGenerator;
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+import net.minecraft.world.level.chunk.storage.ChunkStorage;
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+import net.minecraft.world.level.chunk.storage.RegionFileStorage;
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+import net.minecraft.world.level.dimension.DimensionType;
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+import net.minecraft.world.level.dimension.LevelStem;
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+import net.minecraft.world.level.levelgen.WorldGenSettings;
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+import net.minecraft.world.level.storage.DimensionDataStorage;
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+import net.minecraft.world.level.storage.LevelStorageSource;
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+import org.apache.logging.log4j.LogManager;
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+import org.apache.logging.log4j.Logger;
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+import java.io.File;
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+import java.io.IOException;
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+import java.text.DecimalFormat;
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+import java.util.Optional;
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+import java.util.concurrent.ExecutorService;
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+import java.util.concurrent.Executors;
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+import java.util.concurrent.ThreadFactory;
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+import java.util.concurrent.atomic.AtomicInteger;
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+import java.util.concurrent.atomic.AtomicLong;
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+import java.util.function.Supplier;
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+
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+public class ThreadedWorldUpgrader {
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+
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+ private static final Logger LOGGER = LogManager.getLogger();
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+
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+ private final ResourceKey<LevelStem> dimensionType;
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+ private final String worldName;
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+ private final File worldDir;
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+ private final ExecutorService threadPool;
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+ private final DataFixer dataFixer;
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+ private final Optional<ResourceKey<Codec<? extends ChunkGenerator>>> generatorKey;
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+ private final boolean removeCaches;
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+
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+ public ThreadedWorldUpgrader(final ResourceKey<LevelStem> dimensionType, final String worldName, final File worldDir, final int threads,
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+ final DataFixer dataFixer, final Optional<ResourceKey<Codec<? extends ChunkGenerator>>> generatorKey, final boolean removeCaches) {
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+ this.dimensionType = dimensionType;
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+ this.worldName = worldName;
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+ this.worldDir = worldDir;
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+ this.threadPool = Executors.newFixedThreadPool(Math.max(1, threads), new ThreadFactory() {
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+ private final AtomicInteger threadCounter = new AtomicInteger();
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+
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+ @Override
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+ public Thread newThread(final Runnable run) {
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+ final Thread ret = new Thread(run);
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+
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+ ret.setName("World upgrader thread for world " + ThreadedWorldUpgrader.this.worldName + " #" + this.threadCounter.getAndIncrement());
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+ ret.setUncaughtExceptionHandler((thread, throwable) -> {
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+ LOGGER.fatal("Error upgrading world", throwable);
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+ });
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+
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+ return ret;
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+ }
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+ });
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+ this.dataFixer = dataFixer;
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+ this.generatorKey = generatorKey;
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+ this.removeCaches = removeCaches;
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+ }
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+
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+ public void convert() {
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+ final File worldFolder = LevelStorageSource.getStorageFolder(this.worldDir.toPath(), this.dimensionType).toFile();
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+ final DimensionDataStorage worldPersistentData = new DimensionDataStorage(new File(worldFolder, "data"), this.dataFixer);
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+
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+ final File regionFolder = new File(worldFolder, "region");
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+
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+ LOGGER.info("Force upgrading " + this.worldName);
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+ LOGGER.info("Counting regionfiles for " + this.worldName);
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+ final File[] regionFiles = regionFolder.listFiles((final File dir, final String name) -> {
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+ return WorldUpgrader.REGEX.matcher(name).matches();
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+ });
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+ if (regionFiles == null) {
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+ LOGGER.info("Found no regionfiles to convert for world " + this.worldName);
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+ return;
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+ }
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+ LOGGER.info("Found " + regionFiles.length + " regionfiles to convert");
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+ LOGGER.info("Starting conversion now for world " + this.worldName);
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+
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+ final WorldInfo info = new WorldInfo(() -> worldPersistentData,
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+ new ChunkStorage(regionFolder.toPath(), this.dataFixer, false), this.removeCaches, this.dimensionType, this.generatorKey);
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+
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+ long expectedChunks = (long)regionFiles.length * (32L * 32L);
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+
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+ for (final File regionFile : regionFiles) {
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+ final ChunkPos regionPos = RegionFileStorage.getRegionFileCoordinates(regionFile.toPath());
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+ if (regionPos == null) {
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+ expectedChunks -= (32L * 32L);
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+ continue;
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+ }
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+
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+ this.threadPool.execute(new ConvertTask(info, regionPos.x >> 5, regionPos.z >> 5));
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+ }
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+ this.threadPool.shutdown();
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+
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+ final DecimalFormat format = new DecimalFormat("#0.00");
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+
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+ final long start = System.nanoTime();
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+
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+ while (!this.threadPool.isTerminated()) {
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+ final long current = info.convertedChunks.get();
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+
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+ LOGGER.info("{}% completed ({} / {} chunks)...", format.format((double)current / (double)expectedChunks * 100.0), current, expectedChunks);
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+
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+ try {
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+ Thread.sleep(1000L);
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+ } catch (final InterruptedException ignore) {}
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+ }
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+
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+ final long end = System.nanoTime();
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+
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+ try {
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+ info.loader.close();
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+ } catch (final IOException ex) {
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+ LOGGER.fatal("Failed to close chunk loader", ex);
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+ }
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+ LOGGER.info("Completed conversion. Took {}s, {} out of {} chunks needed to be converted/modified ({}%)",
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+ (int)Math.ceil((end - start) * 1.0e-9), info.modifiedChunks.get(), expectedChunks, format.format((double)info.modifiedChunks.get() / (double)expectedChunks * 100.0));
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+ }
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+
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+ private static final class WorldInfo {
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+
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+ public final Supplier<DimensionDataStorage> persistentDataSupplier;
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+ public final ChunkStorage loader;
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+ public final boolean removeCaches;
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+ public final ResourceKey<LevelStem> worldKey;
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+ public final Optional<ResourceKey<Codec<? extends ChunkGenerator>>> generatorKey;
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+ public final AtomicLong convertedChunks = new AtomicLong();
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+ public final AtomicLong modifiedChunks = new AtomicLong();
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+
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+ private WorldInfo(final Supplier<DimensionDataStorage> persistentDataSupplier, final ChunkStorage loader, final boolean removeCaches,
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+ final ResourceKey<LevelStem> worldKey, Optional<ResourceKey<Codec<? extends ChunkGenerator>>> generatorKey) {
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+ this.persistentDataSupplier = persistentDataSupplier;
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+ this.loader = loader;
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+ this.removeCaches = removeCaches;
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+ this.worldKey = worldKey;
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+ this.generatorKey = generatorKey;
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+ }
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+ }
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+
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+ private static final class ConvertTask implements Runnable {
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+
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+ private final WorldInfo worldInfo;
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+ private final int regionX;
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+ private final int regionZ;
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+
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+ public ConvertTask(final WorldInfo worldInfo, final int regionX, final int regionZ) {
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+ this.worldInfo = worldInfo;
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+ this.regionX = regionX;
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+ this.regionZ = regionZ;
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+ }
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+
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+ @Override
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+ public void run() {
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+ final int regionCX = this.regionX << 5;
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+ final int regionCZ = this.regionZ << 5;
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+
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+ final Supplier<DimensionDataStorage> persistentDataSupplier = this.worldInfo.persistentDataSupplier;
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+ final ChunkStorage loader = this.worldInfo.loader;
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+ final boolean removeCaches = this.worldInfo.removeCaches;
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+ final ResourceKey<LevelStem> worldKey = this.worldInfo.worldKey;
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+
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+ for (int cz = regionCZ; cz < (regionCZ + 32); ++cz) {
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+ for (int cx = regionCX; cx < (regionCX + 32); ++cx) {
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+ final ChunkPos chunkPos = new ChunkPos(cx, cz);
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+ try {
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+ // no need to check the coordinate of the chunk, the regionfilecache does that for us
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+
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+ CompoundTag chunkNBT = (loader.read(chunkPos).join()).orElse(null);
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+
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+ if (chunkNBT == null) {
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+ continue;
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+ }
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+
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+ final int versionBefore = ChunkStorage.getVersion(chunkNBT);
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+
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+ chunkNBT = loader.upgradeChunkTag(worldKey, persistentDataSupplier, chunkNBT, this.worldInfo.generatorKey, chunkPos, null);
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+
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+ boolean modified = versionBefore < SharedConstants.getCurrentVersion().getDataVersion().getVersion();
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+
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+ if (removeCaches) {
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+ final CompoundTag level = chunkNBT.getCompound("Level");
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+ modified |= level.contains("Heightmaps");
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+ level.remove("Heightmaps");
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+ modified |= level.contains("isLightOn");
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+ level.remove("isLightOn");
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+ }
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+
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+ if (modified) {
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+ this.worldInfo.modifiedChunks.getAndIncrement();
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+ loader.write(chunkPos, chunkNBT);
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+ }
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+ } catch (final Exception ex) {
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+ LOGGER.error("Error upgrading chunk {}", chunkPos, ex);
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+ } finally {
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+ this.worldInfo.convertedChunks.getAndIncrement();
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+ }
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+ }
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+ }
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+ }
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+ }
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+}
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diff --git a/src/main/java/net/minecraft/server/Main.java b/src/main/java/net/minecraft/server/Main.java
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index 72d013d06705b08ed696e3d3b6d631d65800c2c9..61840cfd64caba6595dfc99c91c76a195638d4ee 100644
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--- a/src/main/java/net/minecraft/server/Main.java
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+++ b/src/main/java/net/minecraft/server/Main.java
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@@ -399,6 +399,15 @@ public class Main {
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return new WorldLoader.InitConfig(worldloader_d, Commands.CommandSelection.DEDICATED, serverPropertiesHandler.functionPermissionLevel);
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}
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+ // Paper start - fix and optimise world upgrading
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+ public static void convertWorldButItWorks(net.minecraft.resources.ResourceKey<net.minecraft.world.level.dimension.LevelStem> dimensionType, net.minecraft.world.level.storage.LevelStorageSource.LevelStorageAccess worldSession,
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+ DataFixer dataFixer, Optional<net.minecraft.resources.ResourceKey<com.mojang.serialization.Codec<? extends net.minecraft.world.level.chunk.ChunkGenerator>>> generatorKey, boolean removeCaches) {
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+ int threads = Runtime.getRuntime().availableProcessors() * 3 / 8;
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+ final io.papermc.paper.world.ThreadedWorldUpgrader worldUpgrader = new io.papermc.paper.world.ThreadedWorldUpgrader(dimensionType, worldSession.getLevelId(), worldSession.levelDirectory.path().toFile(), threads, dataFixer, generatorKey, removeCaches);
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+ worldUpgrader.convert();
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+ }
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+ // Paper end - fix and optimise world upgrading
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+
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public static void forceUpgrade(LevelStorageSource.LevelStorageAccess session, DataFixer dataFixer, boolean eraseCache, BooleanSupplier continueCheck, Registry<LevelStem> dimensionOptionsRegistry) {
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Main.LOGGER.info("Forcing world upgrade! {}", session.getLevelId()); // CraftBukkit
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WorldUpgrader worldupgrader = new WorldUpgrader(session, dataFixer, dimensionOptionsRegistry, eraseCache);
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diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
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index 79de3c639795cfc0bd86f842446e2bb3ab71d23a..1dfafbe508b4e4598339f412e5fb9d92717b5d26 100644
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--- a/src/main/java/net/minecraft/server/MinecraftServer.java
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+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
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@@ -584,11 +584,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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worlddata = new PrimaryLevelData(worldsettings, worldoptions, worlddimensions_b.specialWorldProperty(), lifecycle);
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}
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worlddata.checkName(name); // CraftBukkit - Migration did not rewrite the level.dat; This forces 1.8 to take the last loaded world as respawn (in this case the end)
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- if (this.options.has("forceUpgrade")) {
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- net.minecraft.server.Main.forceUpgrade(worldSession, DataFixers.getDataFixer(), this.options.has("eraseCache"), () -> {
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- return true;
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- }, dimensions);
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- }
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+ // Paper - fix and optimise world upgrading; move down
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PrimaryLevelData iworlddataserver = worlddata;
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boolean flag = worlddata.isDebugWorld();
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@@ -603,6 +599,13 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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biomeProvider = gen.getDefaultBiomeProvider(worldInfo);
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}
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+ // Paper start - fix and optimise world upgrading
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+ if (options.has("forceUpgrade")) {
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+ net.minecraft.server.Main.convertWorldButItWorks(
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+ dimensionKey, worldSession, DataFixers.getDataFixer(), worlddimension.generator().getTypeNameForDataFixer(), options.has("eraseCache")
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+ );
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+ }
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+ // Paper end - fix and optimise world upgrading
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ResourceKey<Level> worldKey = ResourceKey.create(Registries.DIMENSION, dimensionKey.location());
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if (dimensionKey == LevelStem.OVERWORLD) {
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diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
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index 29368a97c6348e2d1d6241db3d57e84b9537231a..23643b18e9352289ddad1eb1e04d1c3ada5570ad 100644
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--- a/src/main/java/net/minecraft/world/level/Level.java
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+++ b/src/main/java/net/minecraft/world/level/Level.java
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@@ -181,6 +181,15 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
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public final Map<Explosion.CacheKey, Float> explosionDensityCache = new HashMap<>(); // Paper - Optimize explosions
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public java.util.ArrayDeque<net.minecraft.world.level.block.RedstoneTorchBlock.Toggle> redstoneUpdateInfos; // Paper - Faster redstone torch rapid clock removal; Move from Map in BlockRedstoneTorch to here
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+ // Paper start - fix and optimise world upgrading
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+ // copied from below
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+ public static ResourceKey<DimensionType> getDimensionKey(DimensionType manager) {
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+ return ((org.bukkit.craftbukkit.CraftServer)org.bukkit.Bukkit.getServer()).getHandle().getServer().registryAccess().registryOrThrow(net.minecraft.core.registries.Registries.DIMENSION_TYPE).getResourceKey(manager).orElseThrow(() -> {
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+ return new IllegalStateException("Unregistered dimension type: " + manager);
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+ });
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+ }
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+ // Paper end - fix and optimise world upgrading
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+
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public CraftWorld getWorld() {
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return this.world;
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}
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diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
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index 0db8ee3b640e6d1268e9c1cccda85459bd447105..42d37bee3a459adcd46408596ccf93abbcff51fe 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
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@@ -60,6 +60,29 @@ public class RegionFileStorage implements AutoCloseable {
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}
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// Paper start
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+ @Nullable
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+ public static ChunkPos getRegionFileCoordinates(Path file) {
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+ String fileName = file.getFileName().toString();
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+ if (!fileName.startsWith("r.") || !fileName.endsWith(".mca")) {
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+ return null;
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+ }
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+
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+ String[] split = fileName.split("\\.");
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+
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+ if (split.length != 4) {
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+ return null;
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+ }
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+
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+ try {
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+ int x = Integer.parseInt(split[1]);
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+ int z = Integer.parseInt(split[2]);
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+
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+ return new ChunkPos(x << 5, z << 5);
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+ } catch (NumberFormatException ex) {
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+ return null;
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+ }
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+ }
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+
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public synchronized RegionFile getRegionFileIfLoaded(ChunkPos chunkcoordintpair) {
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return this.regionCache.getAndMoveToFirst(ChunkPos.asLong(chunkcoordintpair.getRegionX(), chunkcoordintpair.getRegionZ()));
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}
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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index c9137151f0d2978adb432c40da68689465d2325d..ab7bc27e870227e6746b77a7b5e109e2cf198b5f 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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@@ -1357,9 +1357,7 @@ public final class CraftServer implements Server {
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worlddata.checkName(name);
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worlddata.setModdedInfo(this.console.getServerModName(), this.console.getModdedStatus().shouldReportAsModified());
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- if (this.console.options.has("forceUpgrade")) {
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- net.minecraft.server.Main.forceUpgrade(worldSession, DataFixers.getDataFixer(), this.console.options.has("eraseCache"), () -> true, iregistry);
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- }
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+ // Paper - fix and optimise world upgrading; move down
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long j = BiomeManager.obfuscateSeed(worlddata.worldGenOptions().seed()); // Paper - use world seed
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List<CustomSpawner> list = ImmutableList.of(new PhantomSpawner(), new PatrolSpawner(), new CatSpawner(), new VillageSiege(), new WanderingTraderSpawner(worlddata));
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@@ -1370,6 +1368,13 @@ public final class CraftServer implements Server {
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biomeProvider = generator.getDefaultBiomeProvider(worldInfo);
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}
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+ // Paper start - fix and optimise world upgrading
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+ if (this.console.options.has("forceUpgrade")) {
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+ net.minecraft.server.Main.convertWorldButItWorks(
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+ actualDimension, worldSession, DataFixers.getDataFixer(), worlddimension.generator().getTypeNameForDataFixer(), this.console.options.has("eraseCache")
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+ );
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+ }
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+ // Paper end - fix and optimise world upgrading
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ResourceKey<net.minecraft.world.level.Level> worldKey;
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String levelName = this.getServer().getProperties().levelName;
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if (name.equals(levelName + "_nether")) {
|