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Paper/Spigot-Server-Patches/0322-Detect-and-repair-corrupt-Region-Files.patch
Shane Freeder fb25dc17c6 Updated Upstream (Bukkit/CraftBukkit) 
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
da08d022 SPIGOT-4700: Add PlayerFishEvent.State.REEL_IN
0cef14e4 Remove draft API from selectEntities

CraftBukkit Changes:
a46fdbc6 Remove outdated build delay.
3697519b SPIGOT-4708: Fix ExactChoice recipes neglecting material
9ead7009 SPIGOT-4677: Add minecraft.admin.command_feedback permission
c3749a23 Remove the Damage tag from items when it is 0.
f74c7b95 SPIGOT-4706: Can't interact with active item
494eef45 Mention requirement of JIRA ticket for bug fixes
51d62dec SPIGOT-4702: Exception when middle clicking certain slots
be557e69 SPIGOT-4700: Add PlayerFishEvent.State.REEL_IN
2019-04-22 22:36:14 +01:00

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From 4c3edd05499f6111fd2b4feadc51ebb6a864be3d 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 e2d4450e90..c20511588d 100644
--- a/src/main/java/net/minecraft/server/RegionFile.java
+++ b/src/main/java/net/minecraft/server/RegionFile.java
@@ -25,10 +25,10 @@ public class RegionFile {
private static final boolean ENABLE_EXTENDED_SAVE = Boolean.parseBoolean(System.getProperty("net.minecraft.server.RegionFile.enableExtendedSave", "true"));
// Spigot end
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;
@@ -43,7 +43,7 @@ public class RegionFile {
}
this.c = new RandomAccessFile(file, "rw");
- if (this.c.length() < 4096L) {
+ if (this.c.length() < 8192L) { // Paper - headers should be 8192
this.c.write(RegionFile.a);
this.c.write(RegionFile.a);
this.g += 8192;
@@ -93,22 +93,23 @@ public class RegionFile {
this.c.seek(j * 4 + 4); // Go back to where we were
}
}
- if (k != 0 && (k >> 8) + (length) <= 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 < (length); ++l) {
// Spigot end
this.f.set((k >> 8) + l, false);
}
}
// Spigot start
- else if (length > 0) {
- org.bukkit.Bukkit.getLogger().log(java.util.logging.Level.WARNING, "Invalid chunk: ({0}, {1}) Offset: {2} Length: {3} runs off end file. {4}", new Object[]{j % 32, (int) (j / 32), k >> 8, length, file});
+ else if (k != 0) { // Paper
+ org.bukkit.Bukkit.getLogger().log(java.util.logging.Level.SEVERE, "Invalid chunk: ({0}, {1}) Offset: {2} Length: {3} runs off end file. {4}", new Object[]{j % 32, (int) (j / 32), k >> 8, length, file}); // Paper
+ deleteChunk(j); // Paper
}
// Spigot end
}
for (j = 0; j < 1024; ++j) {
k = headerAsInts.get(); // Paper
- this.e[j] = k;
+ if (offsets[j] != 0) this.timestamps[j] = k; // Paper - don't set timestamp if it got 0'd above due to corruption
}
} catch (IOException ioexception) {
ioexception.printStackTrace();
@@ -144,10 +145,10 @@ public class RegionFile {
int j1 = this.c.readInt();
if (j1 > 4096 * i1) {
- org.bukkit.Bukkit.getLogger().log(java.util.logging.Level.WARNING, "Invalid chunk: ({0}, {1}) Offset: {2} Invalid Size: {3}>{4} {5}", new Object[]{i, j, l, j1, i1 * 4096, this.b}); // Spigot
+ org.bukkit.Bukkit.getLogger().log(java.util.logging.Level.SEVERE, "Invalid chunk: ({0}, {1}) Offset: {2} Invalid Size: {3}>{4} {5}", new Object[]{i, j, l, j1, i1 * 4096, this.b}); // Spigot
return null;
} else if (j1 <= 0) {
- org.bukkit.Bukkit.getLogger().log(java.util.logging.Level.WARNING, "Invalid chunk: ({0}, {1}) Offset: {2} Invalid Size: {3} {4}", new Object[]{i, j, l, j1, this.b}); // Spigot
+ org.bukkit.Bukkit.getLogger().log(java.util.logging.Level.SEVERE, "Invalid chunk: ({0}, {1}) Offset: {2} Invalid Size: {3} {4}", new Object[]{i, j, l, j1, this.b}); // Spigot
return null;
} else {
byte b0 = this.c.readByte();
@@ -327,6 +328,54 @@ 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);
+ String debug = "idx:" + + j1 + " - " + x + "," + z + " - offset: " + offset + " - len: " + len;
+ try {
+ timestamps[j1] = 0;
+ offsets[j1] = 0;
+ RandomAccessFile file = getDataFile();
+ file.seek(j1 * 4);
+ file.writeInt(0);
+ // clear the timestamp
+ file.seek(4096 + j1 * 4);
+ file.writeInt(0);
+ org.bukkit.Bukkit.getLogger().log(java.util.logging.Level.SEVERE, "Deleted corrupt chunk (" + debug + ") " + getFile().getAbsolutePath(), e);
+ } catch (IOException e) {
+
+ org.bukkit.Bukkit.getLogger().log(java.util.logging.Level.SEVERE, "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;
--
2.21.0
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