geforkt von Mirrors/Paper
7df472527f
A long standing bug in spigot and its derivatives was the fact that players taking damage while blocking with a shield would not receive invulnerability, while they do in vanilla. This enabled the pvp technique of disabling a shield and immediately attacking again to knock a player into the air. While upstream fixed this and properly aligned itself with vanilla damage logic (in this specific case) changing such long standing behaviour has some downsides. To allow players used to this specific bug to still use it, this patch introduces a configuration option to re-introduce said bug. As there is no easy way to *only* re-add this bug, the option is found in the unsupported section as it may introduce other damage related disparity from vanilla.
205 Zeilen
9.9 KiB
Diff
205 Zeilen
9.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Fri, 15 Feb 2019 01:08:19 -0500
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Subject: [PATCH] Allow Saving of Oversized Chunks
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Note 1.17 update: With 1.17, Entities are no longer stored in chunk slices, so this needs updating!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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The Minecraft World Region File format has a hard cap of 1MB per chunk.
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This is due to the fact that the header of the file format only allocates
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a single byte for sector count, meaning a maximum of 256 sectors, at 4k per sector.
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This limit can be reached fairly easily with books, resulting in the chunk being unable
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to save to the world. Worse off, is that nothing printed when this occured, and silently
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performed a chunk rollback on next load.
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This leads to security risk with duplication and is being actively exploited.
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This patch catches the too large scenario, falls back and moves any large Entity
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or Tile Entity into a new compound, and this compound is saved into a different file.
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On Chunk Load, we check for oversized status, and if so, we load the extra file and
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merge the Entities and Tile Entities from the oversized chunk back into the level to
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then be loaded as normal.
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Once a chunk is returned back to normal size, the oversized flag will clear, and no
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extra data file will exist.
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This fix maintains compatability with all existing Anvil Region Format tools as it
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does not alter the save format. They will just not know about the extra entities.
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This fix also maintains compatability if someone switches server jars to one without
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this fix, as the data will remain in the oversized file. Once the server returns
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to a jar with this fix, the data will be restored.
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diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
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index e858436bcf1b234d4bc6e6a117f5224d5c2d9f90..e761b63eebc1e76b2bb1cb887d83d0b63ad6ec90 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
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@@ -18,10 +18,13 @@ import java.nio.file.LinkOption;
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import java.nio.file.Path;
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import java.nio.file.StandardCopyOption;
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import java.nio.file.StandardOpenOption;
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+import java.util.zip.InflaterInputStream; // Paper
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import javax.annotation.Nullable;
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import net.minecraft.Util;
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import net.minecraft.resources.ResourceLocation;
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import net.minecraft.util.profiling.jfr.JvmProfiler;
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+import net.minecraft.nbt.CompoundTag; // Paper
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+import net.minecraft.nbt.NbtIo; // Paper
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import net.minecraft.world.level.ChunkPos;
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import org.slf4j.Logger;
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@@ -58,6 +61,7 @@ public class RegionFile implements AutoCloseable {
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this.usedSectors = new RegionBitmap();
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this.info = storageKey;
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this.path = path;
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+ initOversizedState(); // Paper
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this.version = compressionFormat;
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if (!Files.isDirectory(directory, new LinkOption[0])) {
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throw new IllegalArgumentException("Expected directory, got " + String.valueOf(directory.toAbsolutePath()));
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@@ -443,6 +447,74 @@ public class RegionFile implements AutoCloseable {
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}
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public static final int MAX_CHUNK_SIZE = 500 * 1024 * 1024; // Paper - don't write garbage data to disk if writing serialization fails
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+ // Paper start
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+ private final byte[] oversized = new byte[1024];
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+ private int oversizedCount;
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+
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+ private synchronized void initOversizedState() throws IOException {
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+ Path metaFile = getOversizedMetaFile();
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+ if (Files.exists(metaFile)) {
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+ final byte[] read = java.nio.file.Files.readAllBytes(metaFile);
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+ System.arraycopy(read, 0, oversized, 0, oversized.length);
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+ for (byte temp : oversized) {
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+ oversizedCount += temp;
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+ }
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+ }
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+ }
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+
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+ private static int getChunkIndex(int x, int z) {
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+ return (x & 31) + (z & 31) * 32;
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+ }
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+ synchronized boolean isOversized(int x, int z) {
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+ return this.oversized[getChunkIndex(x, z)] == 1;
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+ }
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+ synchronized void setOversized(int x, int z, boolean oversized) throws IOException {
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+ final int offset = getChunkIndex(x, z);
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+ boolean previous = this.oversized[offset] == 1;
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+ this.oversized[offset] = (byte) (oversized ? 1 : 0);
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+ if (!previous && oversized) {
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+ oversizedCount++;
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+ } else if (!oversized && previous) {
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+ oversizedCount--;
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+ }
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+ if (previous && !oversized) {
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+ Path oversizedFile = getOversizedFile(x, z);
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+ if (Files.exists(oversizedFile)) {
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+ Files.delete(oversizedFile);
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+ }
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+ }
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+ if (oversizedCount > 0) {
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+ if (previous != oversized) {
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+ writeOversizedMeta();
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+ }
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+ } else if (previous) {
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+ Path oversizedMetaFile = getOversizedMetaFile();
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+ if (Files.exists(oversizedMetaFile)) {
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+ Files.delete(oversizedMetaFile);
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+ }
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+ }
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+ }
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+
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+ private void writeOversizedMeta() throws IOException {
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+ java.nio.file.Files.write(getOversizedMetaFile(), oversized);
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+ }
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+
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+ private Path getOversizedMetaFile() {
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+ return this.path.getParent().resolve(this.path.getFileName().toString().replaceAll("\\.mca$", "") + ".oversized.nbt");
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+ }
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+
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+ private Path getOversizedFile(int x, int z) {
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+ return this.path.getParent().resolve(this.path.getFileName().toString().replaceAll("\\.mca$", "") + "_oversized_" + x + "_" + z + ".nbt");
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+ }
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+
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+ synchronized CompoundTag getOversizedData(int x, int z) throws IOException {
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+ Path file = getOversizedFile(x, z);
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+ try (DataInputStream out = new DataInputStream(new java.io.BufferedInputStream(new InflaterInputStream(Files.newInputStream(file))))) {
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+ return NbtIo.read((java.io.DataInput) out);
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+ }
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+
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+ }
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+ // Paper end
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private class ChunkBuffer extends ByteArrayOutputStream {
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private final ChunkPos pos;
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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 18054304e08c8a6346c0135a0e6a68e77fe5c37c..0615fd82b71efb9a397de01615050e6d906c2844 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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@@ -144,6 +144,43 @@ public class RegionFileStorage implements AutoCloseable, ca.spottedleaf.moonrise
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// Paper end - rewrite chunk system
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}
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+ // Paper start
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+ private static void printOversizedLog(String msg, Path file, int x, int z) {
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+ org.apache.logging.log4j.LogManager.getLogger().fatal(msg + " (" + file.toString().replaceAll(".+[\\\\/]", "") + " - " + x + "," + z + ") Go clean it up to remove this message. /minecraft:tp " + (x<<4)+" 128 "+(z<<4) + " - DO NOT REPORT THIS TO PAPER - You may ask for help on Discord, but do not file an issue. These error messages can not be removed.");
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+ }
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+
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+ private static CompoundTag readOversizedChunk(RegionFile regionfile, ChunkPos chunkCoordinate) throws IOException {
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+ synchronized (regionfile) {
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+ try (DataInputStream datainputstream = regionfile.getChunkDataInputStream(chunkCoordinate)) {
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+ CompoundTag oversizedData = regionfile.getOversizedData(chunkCoordinate.x, chunkCoordinate.z);
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+ CompoundTag chunk = NbtIo.read((DataInput) datainputstream);
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+ if (oversizedData == null) {
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+ return chunk;
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+ }
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+ CompoundTag oversizedLevel = oversizedData.getCompound("Level");
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+
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+ mergeChunkList(chunk.getCompound("Level"), oversizedLevel, "Entities", "Entities");
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+ mergeChunkList(chunk.getCompound("Level"), oversizedLevel, "TileEntities", "TileEntities");
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+
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+ return chunk;
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+ } catch (Throwable throwable) {
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+ throwable.printStackTrace();
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+ throw throwable;
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+ }
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+ }
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+ }
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+
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+ private static void mergeChunkList(CompoundTag level, CompoundTag oversizedLevel, String key, String oversizedKey) {
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+ net.minecraft.nbt.ListTag levelList = level.getList(key, net.minecraft.nbt.Tag.TAG_COMPOUND);
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+ net.minecraft.nbt.ListTag oversizedList = oversizedLevel.getList(oversizedKey, net.minecraft.nbt.Tag.TAG_COMPOUND);
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+
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+ if (!oversizedList.isEmpty()) {
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+ levelList.addAll(oversizedList);
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+ level.put(key, levelList);
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+ }
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+ }
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+ // Paper end
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+
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@Nullable
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public CompoundTag read(ChunkPos pos) throws IOException {
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// CraftBukkit start - SPIGOT-5680: There's no good reason to preemptively create files on read, save that for writing
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@@ -154,6 +191,12 @@ public class RegionFileStorage implements AutoCloseable, ca.spottedleaf.moonrise
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// CraftBukkit end
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DataInputStream datainputstream = regionfile.getChunkDataInputStream(pos);
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+ // Paper start
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+ if (regionfile.isOversized(pos.x, pos.z)) {
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+ printOversizedLog("Loading Oversized Chunk!", regionfile.getPath(), pos.x, pos.z);
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+ return readOversizedChunk(regionfile, pos);
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+ }
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+ // Paper end
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CompoundTag nbttagcompound;
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label43:
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{
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@@ -242,6 +285,7 @@ public class RegionFileStorage implements AutoCloseable, ca.spottedleaf.moonrise
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try {
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NbtIo.write(nbt, (DataOutput) dataoutputstream);
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+ regionfile.setOversized(pos.x, pos.z, false); // Paper - We don't do this anymore, mojang stores differently, but clear old meta flag if it exists to get rid of our own meta file once last oversized is gone
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// Paper start - don't write garbage data to disk if writing serialization fails
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dataoutputstream.close(); // Only write if successful
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} catch (final RegionFileSizeException e) {
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