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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Sun, 19 Dec 2021 09:13:41 -0800
Subject: [PATCH] Only write chunk data to disk if it serializes without
throwing
This ensures at least a valid version of the chunk exists
on disk, even if outdated
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
index 057875cbbdc92ba49b429f9a129514760edb32a2..ff092c6d0cd436f14a9a4ff5c8ddbb5538d1a8c5 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
@@ -539,6 +539,7 @@ public class RegionFile implements AutoCloseable, ca.spottedleaf.moonrise.patche
}
// Paper end
+ public static final int MAX_CHUNK_SIZE = 500 * 1024 * 1024; // Paper - don't write garbage data to disk if writing serialization fails
private class ChunkBuffer extends ByteArrayOutputStream implements ca.spottedleaf.moonrise.patches.chunk_system.storage.ChunkSystemChunkBuffer { // Paper - rewrite chunk system
private final ChunkPos pos;
@@ -571,6 +572,23 @@ public class RegionFile implements AutoCloseable, ca.spottedleaf.moonrise.patche
super.write(RegionFile.this.version.getId());
this.pos = chunkcoordintpair;
}
+ // Paper start - don't write garbage data to disk if writing serialization fails
+ @Override
+ public void write(final int b) {
+ if (this.count > MAX_CHUNK_SIZE) {
+ throw new RegionFileStorage.RegionFileSizeException("Region file too large: " + this.count);
+ }
+ super.write(b);
+ }
+
+ @Override
+ public void write(final byte[] b, final int off, final int len) {
+ if (this.count + len > MAX_CHUNK_SIZE) {
+ throw new RegionFileStorage.RegionFileSizeException("Region file too large: " + (this.count + len));
+ }
+ super.write(b, off, len);
+ }
+ // Paper end - don't write garbage data to disk if writing serialization fails
public void close() throws IOException {
ByteBuffer bytebuffer = ByteBuffer.wrap(this.buf, 0, this.count);
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
index fdf8e18d24442178b52397acb482ffa3306a32e3..8d66d6b7aeb9feb54ebd83f5c73b45d42b9a7034 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
@@ -19,6 +19,8 @@ import net.minecraft.world.level.ChunkPos;
public class RegionFileStorage implements AutoCloseable, ca.spottedleaf.moonrise.patches.chunk_system.io.ChunkSystemRegionFileStorage { // Paper - rewrite chunk system
+ private static final org.slf4j.Logger LOGGER = com.mojang.logging.LogUtils.getLogger(); // Paper
+
public static final String ANVIL_EXTENSION = ".mca";
private static final int MAX_CACHE_SIZE = 256;
public final Long2ObjectLinkedOpenHashMap<RegionFile> regionCache = new Long2ObjectLinkedOpenHashMap();
@@ -123,11 +125,24 @@ public class RegionFileStorage implements AutoCloseable, ca.spottedleaf.moonrise
// (and, the regionfile parameter is unused for writing until the write call)
final ca.spottedleaf.moonrise.patches.chunk_system.io.MoonriseRegionFileIO.RegionDataController.WriteData writeData = ((ca.spottedleaf.moonrise.patches.chunk_system.storage.ChunkSystemRegionFile)regionFile).moonrise$startWrite(compound, pos);
+ try { // Paper - implement RegionFileSizeException
try {
NbtIo.write(compound, writeData.output());
} finally {
writeData.output().close();
}
+ // Paper start - implement RegionFileSizeException
+ } catch (final RegionFileSizeException ex) {
+ // note: it's OK if close() is called, as close() here will not issue a write to the RegionFile
+ // see startWrite
+ final int maxSize = RegionFile.MAX_CHUNK_SIZE / (1024 * 1024);
+ LOGGER.error("Chunk at (" + chunkX + "," + chunkZ + ") in regionfile '" + regionFile.getPath().toString() + "' exceeds max size of " + maxSize + "MiB, it has been deleted from disk.");
+ return new ca.spottedleaf.moonrise.patches.chunk_system.io.MoonriseRegionFileIO.RegionDataController.WriteData(
+ compound, ca.spottedleaf.moonrise.patches.chunk_system.io.MoonriseRegionFileIO.RegionDataController.WriteData.WriteResult.DELETE,
+ null, null
+ );
+ }
+ // Paper end - implement RegionFileSizeException
return writeData;
}
@@ -378,10 +393,18 @@ public class RegionFileStorage implements AutoCloseable, ca.spottedleaf.moonrise
try {
NbtIo.write(nbt, (DataOutput) dataoutputstream);
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
+ // Paper start - don't write garbage data to disk if writing serialization fails
+ dataoutputstream.close(); // Only write if successful
+ } catch (final RegionFileSizeException ex) {
+ regionfile.clear(pos);
+ final int maxSize = RegionFile.MAX_CHUNK_SIZE / (1024 * 1024);
+ LOGGER.error("Chunk at (" + pos.x + "," + pos.z + ") in regionfile '" + regionfile.getPath().toString() + "' exceeds max size of " + maxSize + "MiB, it has been deleted from disk.");
+ return;
+ // Paper end - don't write garbage data to disk if writing serialization fails
} catch (Throwable throwable) {
if (dataoutputstream != null) {
try {
- dataoutputstream.close();
+ //dataoutputstream.close(); // Paper - don't write garbage data to disk if writing serialization fails
} catch (Throwable throwable1) {
throwable.addSuppressed(throwable1);
}
@@ -389,10 +412,7 @@ public class RegionFileStorage implements AutoCloseable, ca.spottedleaf.moonrise
throw throwable;
}
-
- if (dataoutputstream != null) {
- dataoutputstream.close();
- }
+ // Paper - don't write garbage data to disk if writing serialization fails; move into try block to only write if successfully serialized
}
}
@@ -435,4 +455,13 @@ public class RegionFileStorage implements AutoCloseable, ca.spottedleaf.moonrise
public RegionStorageInfo info() {
return this.info;
}
+
+ // Paper start - don't write garbage data to disk if writing serialization fails
+ public static final class RegionFileSizeException extends RuntimeException {
+
+ public RegionFileSizeException(String message) {
+ super(message);
+ }
+ }
+ // Paper end - don't write garbage data to disk if writing serialization fails
}
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