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Rewrite chunk system (#8177)

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Patch documentation to come

Issues with the old system that are fixed now:
- World generation does not scale with cpu cores effectively.
- Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps.
- Unreliable prioritisation of chunk gen/load calls that block the main thread.
- Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved.
- Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal.
- Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles.

The above list is not complete. The patch documentation will complete it.

New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil.

Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft.

The old legacy chunk system patches have been moved to the removed folder in case we need them again.
This commit is contained in:
Spottedleaf
2022-09-26 01:02:51 -07:00
parent 614f528234
commit 0f1a8717e8
122 changed files with 18921 additions and 12279 deletions
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34
patches/server/Anti-Xray.patch
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@@ -1047,30 +1047,12 @@ diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/j
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -0,0 +0,0 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
completablefuture1.thenAcceptAsync((either) -> {
either.ifLeft((chunk) -> {
this.tickingGenerated.getAndIncrement();
- MutableObject<ClientboundLevelChunkWithLightPacket> mutableobject = new MutableObject();
+ MutableObject<java.util.Map<Object, ClientboundLevelChunkWithLightPacket>> mutableobject = new MutableObject<>(); // Paper - Anti-Xray - Bypass
this.getPlayers(chunkcoordintpair, false).forEach((entityplayer) -> {
this.playerLoadedChunk(entityplayer, mutableobject, chunk);
@@ -0,0 +0,0 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
while (objectiterator.hasNext()) {
ChunkHolder playerchunk = (ChunkHolder) objectiterator.next();
ChunkPos chunkcoordintpair = playerchunk.getPos();
- MutableObject<ClientboundLevelChunkWithLightPacket> mutableobject = new MutableObject();
+ MutableObject<java.util.Map<Object, ClientboundLevelChunkWithLightPacket>> mutableobject = new MutableObject<>(); // Paper - Anti-Xray - Bypass
this.getPlayers(chunkcoordintpair, false).forEach((entityplayer) -> {
SectionPos sectionposition = entityplayer.getLastSectionPos();
@@ -0,0 +0,0 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
- protected void updateChunkTracking(ServerPlayer player, ChunkPos pos, MutableObject<ClientboundLevelChunkWithLightPacket> packet, boolean oldWithinViewDistance, boolean newWithinViewDistance) {
+ protected void updateChunkTracking(ServerPlayer player, ChunkPos pos, MutableObject<java.util.Map<Object, ClientboundLevelChunkWithLightPacket>> packet, boolean oldWithinViewDistance, boolean newWithinViewDistance) { // Paper - Anti-Xray - Bypass
- public void updateChunkTracking(ServerPlayer player, ChunkPos pos, MutableObject<ClientboundLevelChunkWithLightPacket> packet, boolean oldWithinViewDistance, boolean newWithinViewDistance) { // Paper - public
+ public void updateChunkTracking(ServerPlayer player, ChunkPos pos, MutableObject<java.util.Map<Object, ClientboundLevelChunkWithLightPacket>> packet, boolean oldWithinViewDistance, boolean newWithinViewDistance) { // Paper - public // Paper - Anti-Xray - Bypass
if (player.level == this.level) {
if (newWithinViewDistance && !oldWithinViewDistance) {
ChunkHolder playerchunk = this.getVisibleChunkIfPresent(pos.toLong());
@@ -1205,9 +1187,9 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
public LevelChunk(Level world, ChunkPos pos, UpgradeData upgradeData, LevelChunkTicks<Block> blockTickScheduler, LevelChunkTicks<Fluid> fluidTickScheduler, long inhabitedTime, @Nullable LevelChunkSection[] sectionArrayInitializer, @Nullable LevelChunk.PostLoadProcessor entityLoader, @Nullable BlendingData blendingData) {
- super(pos, upgradeData, world, world.registryAccess().registryOrThrow(Registry.BIOME_REGISTRY), inhabitedTime, sectionArrayInitializer, blendingData);
+ super(pos, upgradeData, world, net.minecraft.server.MinecraftServer.getServer().registryAccess().registryOrThrow(Registry.BIOME_REGISTRY), inhabitedTime, sectionArrayInitializer, blendingData); // Paper - Anti-Xray - The world isn't ready yet, use server singleton for registry
this.tickersInLevel = Maps.newHashMap();
this.clientLightReady = false;
this.level = (ServerLevel) world; // CraftBukkit - type
// Paper start - rewrite light engine
this.setBlockNibbles(ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(world));
this.setSkyNibbles(ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(world));
diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java
@@ -1560,7 +1542,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -0,0 +0,0 @@ public class CraftWorld extends CraftRegionAccessor implements World {
List<ServerPlayer> playersInRange = playerChunk.playerProvider.getPlayers(playerChunk.getPos(), false);
if (playersInRange.isEmpty()) return;
if (playersInRange.isEmpty()) return true; // Paper - rewrite player chunk loader
- ClientboundLevelChunkWithLightPacket refreshPacket = new ClientboundLevelChunkWithLightPacket(chunk, this.world.getLightEngine(), null, null, true);
+ // Paper start - Anti-Xray - Bypass
@@ -1575,8 +1557,8 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
+ }));
+ // Paper end
}
});
});
// Paper - rewrite player chunk loader
diff --git a/src/main/java/org/bukkit/craftbukkit/generator/OldCraftChunkData.java b/src/main/java/org/bukkit/craftbukkit/generator/OldCraftChunkData.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/generator/OldCraftChunkData.java