Paper/Spigot-Server-Patches/0325-Detect-and-repair-corrupt-Region-Files.patch

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4.9 KiB
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From cd74ac2197650f3df5f0f1148ad08de5a75e3d8c Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sat, 11 Aug 2018 00:49:20 -0400
Subject: [PATCH] Detect and repair corrupt Region Files
If the file has partial data written but not the full 8192 bytes,
then the server will be unable to load that region file...
I don't know why mojang only checks for 4096, when anything less than 8192 is a crash.
But to be safe, it will attempt to back up the file.
diff --git a/src/main/java/net/minecraft/server/RegionFile.java b/src/main/java/net/minecraft/server/RegionFile.java
index 5d2853b9c..6a2edfd1e 100644
--- a/src/main/java/net/minecraft/server/RegionFile.java
+++ b/src/main/java/net/minecraft/server/RegionFile.java
@@ -22,10 +22,10 @@ import javax.annotation.Nullable;
public class RegionFile {
private static final byte[] a = new byte[4096];
- private final File b;
- private RandomAccessFile c;
- private final int[] d = new int[1024];
- private final int[] e = new int[1024];
+ private final File b;private File getFile() { return b; } // Paper - OBFHELPER
+ private RandomAccessFile c;private RandomAccessFile getDataFile() { return c; } // Paper - OBFHELPER
+ private final int[] d = new int[1024];private int[] offsets = d; // Paper - OBFHELPER
+ private final int[] e = new int[1024];private int[] timestamps = e; // Paper - OBFHELPER
private List<Boolean> f;
private int g;
private long h;
@@ -40,7 +40,7 @@ public class RegionFile {
}
this.c = new RandomAccessFile(file1, "rw");
- if (this.c.length() < 4096L) {
+ if (this.c.length() < 8192L) { // Paper - headers should be 8192
this.c.write(a);
this.c.write(a);
this.g += 8192;
@@ -74,16 +74,16 @@ public class RegionFile {
for(int j1 = 0; j1 < 1024; ++j1) {
int k = headerAsInts.get(); // Paper
this.d[j1] = k;
- if (k != 0 && (k >> 8) + (k & 255) <= this.f.size()) {
+ if (k > 0 && (k >> 8) > 1 && (k >> 8) + (k & 255) <= this.f.size()) { // Paper >= 1 as 0/1 are the headers, and negative isnt valid
for(int l = 0; l < (k & 255); ++l) {
this.f.set((k >> 8) + l, false);
}
- }
+ } else if (k != 0) deleteChunk(j1); // Paper
}
for(int k1 = 0; k1 < 1024; ++k1) {
int l1 = headerAsInts.get(); // Paper
- this.e[k1] = l1;
+ if (offsets[k1] != 0) this.timestamps[k1] = l1; // Paper - don't set timestamp if it got 0'd above due to corruption
}
} catch (IOException ioexception) {
ioexception.printStackTrace();
@@ -276,6 +276,55 @@ public class RegionFile {
}
+ // Paper start
+ public synchronized void deleteChunk(int j1) {
+ backup();
+ int k = offsets[j1];
+ int x = j1 & 1024;
+ int z = j1 >> 2;
+ int offset = (k >> 8);
+ int len = (k & 255);
+ org.apache.logging.log4j.Logger logger = org.apache.logging.log4j.LogManager.getLogger();
+ String debug = "idx:" + + j1 + " - " + x + "," + z + " - offset: " + offset + " - len: " + len;
+ try {
+ RandomAccessFile file = getDataFile();
+ file.seek(j1 * 4);
+ file.writeInt(0);
+ // clear the timestamp
+ file.seek(4096 + j1 * 4);
+ file.writeInt(0);
+ timestamps[j1] = 0;
+ offsets[j1] = 0;
+ logger.error("Deleted corrupt chunk (" + debug + ") " + getFile().getAbsolutePath(), e);
+ } catch (IOException e) {
+
+ logger.error("Error deleting corrupt chunk (" + debug + ") " + getFile().getAbsolutePath(), e);
+ }
+ }
+ private boolean backedUp = false;
+ private synchronized void backup() {
+ if (backedUp) {
+ return;
+ }
+ backedUp = true;
+ File file = this.getFile();
+ java.text.DateFormat formatter = new java.text.SimpleDateFormat("yyyy-MM-dd");
+ java.util.Date today = new java.util.Date();
+ File corrupt = new File(file.getParentFile(), file.getName() + "." + formatter.format(today) + ".corrupt");
+ if (corrupt.exists()) {
+ return;
+ }
+ org.apache.logging.log4j.Logger logger = org.apache.logging.log4j.LogManager.getLogger();
+ logger.error("Region file " + file.getAbsolutePath() + " was corrupt. Backing up to " + corrupt.getAbsolutePath() + " and repairing");
+ try {
+ java.nio.file.Files.copy(file.toPath(), corrupt.toPath());
+
+ } catch (IOException e) {
+ logger.error("Error backing up corrupt file" + file.getAbsolutePath(), e);
+ }
+ }
+ // Paper end
+
class ChunkBuffer extends ByteArrayOutputStream {
private final int b;
private final int c;
--
2.20.0