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