# HG changeset patch # User uta # Date 1369653480 -14400 # Node ID 9d2234cba0ffd4bc96f95ca32fa14fcddf5f00ec # Parent 04271182b2c1cac674808ca65ce636b29a5598f7 8014394: (fs) WatchService failing when watching \\server\$d Reviewed-by: alanb diff -r 04271182b2c1 -r 9d2234cba0ff jdk/src/windows/classes/sun/nio/fs/WindowsConstants.java --- a/jdk/src/windows/classes/sun/nio/fs/WindowsConstants.java Fri May 24 17:01:08 2013 -0700 +++ b/jdk/src/windows/classes/sun/nio/fs/WindowsConstants.java Mon May 27 15:18:00 2013 +0400 @@ -100,6 +100,7 @@ public static final int ERROR_INVALID_LEVEL = 124; public static final int ERROR_DIR_NOT_EMPTY = 145; public static final int ERROR_ALREADY_EXISTS = 183; + public static final int ERROR_MORE_DATA = 234; public static final int ERROR_DIRECTORY = 267; public static final int ERROR_NOTIFY_ENUM_DIR = 1022; public static final int ERROR_NONE_MAPPED = 1332; diff -r 04271182b2c1 -r 9d2234cba0ff jdk/src/windows/classes/sun/nio/fs/WindowsNativeDispatcher.java --- a/jdk/src/windows/classes/sun/nio/fs/WindowsNativeDispatcher.java Fri May 24 17:01:08 2013 -0700 +++ b/jdk/src/windows/classes/sun/nio/fs/WindowsNativeDispatcher.java Mon May 27 15:18:00 2013 +0400 @@ -973,19 +973,19 @@ * HANDLE CreateIoCompletionPort ( * HANDLE FileHandle, * HANDLE ExistingCompletionPort, - * DWORD CompletionKey, + * ULONG_PTR CompletionKey, * DWORD NumberOfConcurrentThreads * ) */ static native long CreateIoCompletionPort(long fileHandle, long existingPort, - int completionKey) throws WindowsException; + long completionKey) throws WindowsException; /** * GetQueuedCompletionStatus( * HANDLE CompletionPort, * LPDWORD lpNumberOfBytesTransferred, - * LPDWORD lpCompletionKey, + * PULONG_PTR lpCompletionKey, * LPOVERLAPPED *lpOverlapped, * DWORD dwMilliseconds */ @@ -999,12 +999,12 @@ static class CompletionStatus { private int error; private int bytesTransferred; - private int completionKey; + private long completionKey; private CompletionStatus() { } int error() { return error; } int bytesTransferred() { return bytesTransferred; } - int completionKey() { return completionKey; } + long completionKey() { return completionKey; } } private static native void GetQueuedCompletionStatus0(long completionPort, CompletionStatus status) throws WindowsException; @@ -1013,12 +1013,12 @@ * PostQueuedCompletionStatus( * HANDLE CompletionPort, * DWORD dwNumberOfBytesTransferred, - * DWORD dwCompletionKey, + * ULONG_PTR dwCompletionKey, * LPOVERLAPPED lpOverlapped * ) */ static native void PostQueuedCompletionStatus(long completionPort, - int completionKey) throws WindowsException; + long completionKey) throws WindowsException; /** * ReadDirectoryChangesW( diff -r 04271182b2c1 -r 9d2234cba0ff jdk/src/windows/classes/sun/nio/fs/WindowsWatchService.java --- a/jdk/src/windows/classes/sun/nio/fs/WindowsWatchService.java Fri May 24 17:01:08 2013 -0700 +++ b/jdk/src/windows/classes/sun/nio/fs/WindowsWatchService.java Mon May 27 15:18:00 2013 +0400 @@ -41,6 +41,7 @@ class WindowsWatchService extends AbstractWatchService { + private final static int WAKEUP_COMPLETION_KEY = 0; private final Unsafe unsafe = Unsafe.getUnsafe(); // background thread to service I/O completion port @@ -83,7 +84,7 @@ */ private class WindowsWatchKey extends AbstractWatchKey { // file key (used to detect existing registrations) - private FileKey fileKey; + private final FileKey fileKey; // handle to directory private volatile long handle = INVALID_HANDLE_VALUE; @@ -223,8 +224,7 @@ FileKey other = (FileKey)obj; if (this.volSerialNumber != other.volSerialNumber) return false; if (this.fileIndexHigh != other.fileIndexHigh) return false; - if (this.fileIndexLow != other.fileIndexLow) return false; - return true; + return this.fileIndexLow == other.fileIndexLow; } } @@ -268,6 +268,7 @@ private static final short OFFSETOF_FILENAME = 12; // size of per-directory buffer for events (FIXME - make this configurable) + // Need to be less than 4*16384 = 65536. DWORD align. private static final int CHANGES_BUFFER_SIZE = 16 * 1024; private final WindowsFileSystem fs; @@ -275,27 +276,28 @@ private final long port; // maps completion key to WatchKey - private final Map int2key; + private final Map ck2key; // maps file key to WatchKey private final Map fk2key; // unique completion key for each directory + // native completion key capacity is 64 bits on Win64. private int lastCompletionKey; Poller(WindowsFileSystem fs, WindowsWatchService watcher, long port) { this.fs = fs; this.watcher = watcher; this.port = port; - this.int2key = new HashMap(); - this.fk2key = new HashMap(); + this.ck2key = new HashMap<>(); + this.fk2key = new HashMap<>(); this.lastCompletionKey = 0; } @Override void wakeup() throws IOException { try { - PostQueuedCompletionStatus(port, 0); + PostQueuedCompletionStatus(port, WAKEUP_COMPLETION_KEY); } catch (WindowsException x) { throw new IOException(x.getMessage()); } @@ -322,7 +324,6 @@ for (WatchEvent.Modifier modifier: modifiers) { if (modifier == ExtendedWatchEventModifier.FILE_TREE) { watchSubtree = true; - continue; } else { if (modifier == null) return new NullPointerException(); @@ -333,7 +334,7 @@ } // open directory - long handle = -1L; + long handle; try { handle = CreateFile(dir.getPathForWin32Calls(), FILE_LIST_DIRECTORY, @@ -347,7 +348,7 @@ boolean registered = false; try { // read attributes and check file is a directory - WindowsFileAttributes attrs = null; + WindowsFileAttributes attrs; try { attrs = WindowsFileAttributes.readAttributes(handle); } catch (WindowsException x) { @@ -370,9 +371,10 @@ return existing; } - // unique completion key (skip 0) + // Can overflow the int type capacity. + // Skip WAKEUP_COMPLETION_KEY value. int completionKey = ++lastCompletionKey; - if (completionKey == 0) + if (completionKey == WAKEUP_COMPLETION_KEY) completionKey = ++lastCompletionKey; // associate handle with completion port @@ -418,13 +420,13 @@ // 1. remove mapping from old completion key to existing watch key // 2. release existing key's resources (handle/buffer) // 3. re-initialize key with new handle/buffer - int2key.remove(existing.completionKey()); + ck2key.remove(existing.completionKey()); existing.releaseResources(); watchKey = existing.init(handle, events, watchSubtree, buffer, countAddress, overlappedAddress, completionKey); } // map completion map to watch key - int2key.put(completionKey, watchKey); + ck2key.put(completionKey, watchKey); registered = true; return watchKey; @@ -440,7 +442,7 @@ WindowsWatchKey key = (WindowsWatchKey)obj; if (key.isValid()) { fk2key.remove(key.fileKey()); - int2key.remove(key.completionKey()); + ck2key.remove(key.completionKey()); key.invalidate(); } } @@ -449,11 +451,11 @@ @Override void implCloseAll() { // cancel all keys - for (Map.Entry entry: int2key.entrySet()) { + for (Map.Entry entry: ck2key.entrySet()) { entry.getValue().invalidate(); } fk2key.clear(); - int2key.clear(); + ck2key.clear(); // close I/O completion port CloseHandle(port); @@ -517,7 +519,7 @@ @Override public void run() { for (;;) { - CompletionStatus info = null; + CompletionStatus info; try { info = GetQueuedCompletionStatus(port); } catch (WindowsException x) { @@ -527,7 +529,7 @@ } // wakeup - if (info.completionKey() == 0) { + if (info.completionKey() == WAKEUP_COMPLETION_KEY) { boolean shutdown = processRequests(); if (shutdown) { return; @@ -536,7 +538,7 @@ } // map completionKey to get WatchKey - WindowsWatchKey key = int2key.get(info.completionKey()); + WindowsWatchKey key = ck2key.get((int)info.completionKey()); if (key == null) { // We get here when a registration is changed. In that case // the directory is closed which causes an event with the @@ -544,38 +546,44 @@ continue; } - // ReadDirectoryChangesW failed - if (info.error() != 0) { + boolean criticalError = false; + int errorCode = info.error(); + int messageSize = info.bytesTransferred(); + if (errorCode == ERROR_NOTIFY_ENUM_DIR) { // buffer overflow - if (info.error() == ERROR_NOTIFY_ENUM_DIR) { - key.signalEvent(StandardWatchEventKinds.OVERFLOW, null); - } else { - // other error so cancel key - implCancelKey(key); - key.signal(); - } - continue; - } + key.signalEvent(StandardWatchEventKinds.OVERFLOW, null); + } else if (errorCode != 0 && errorCode != ERROR_MORE_DATA) { + // ReadDirectoryChangesW failed + criticalError = true; + } else { + // ERROR_MORE_DATA is a warning about incomplite + // data transfer over TCP/UDP stack. For the case + // [messageSize] is zero in the most of cases. - // process the events - if (info.bytesTransferred() > 0) { - processEvents(key, info.bytesTransferred()); - } else { - // insufficient buffer size - key.signalEvent(StandardWatchEventKinds.OVERFLOW, null); - } + if (messageSize > 0) { + // process non-empty events. + processEvents(key, messageSize); + } else if (errorCode == 0) { + // insufficient buffer size + // not described, but can happen. + key.signalEvent(StandardWatchEventKinds.OVERFLOW, null); + } - // start read for next batch of changes - try { - ReadDirectoryChangesW(key.handle(), - key.buffer().address(), - CHANGES_BUFFER_SIZE, - key.watchSubtree(), - ALL_FILE_NOTIFY_EVENTS, - key.countAddress(), - key.overlappedAddress()); - } catch (WindowsException x) { - // no choice but to cancel key + // start read for next batch of changes + try { + ReadDirectoryChangesW(key.handle(), + key.buffer().address(), + CHANGES_BUFFER_SIZE, + key.watchSubtree(), + ALL_FILE_NOTIFY_EVENTS, + key.countAddress(), + key.overlappedAddress()); + } catch (WindowsException x) { + // no choice but to cancel key + criticalError = true; + } + } + if (criticalError) { implCancelKey(key); key.signal(); } diff -r 04271182b2c1 -r 9d2234cba0ff jdk/src/windows/native/sun/nio/fs/WindowsNativeDispatcher.c --- a/jdk/src/windows/native/sun/nio/fs/WindowsNativeDispatcher.c Fri May 24 17:01:08 2013 -0700 +++ b/jdk/src/windows/native/sun/nio/fs/WindowsNativeDispatcher.c Mon May 27 15:18:00 2013 +0400 @@ -162,7 +162,7 @@ } completionStatus_error = (*env)->GetFieldID(env, clazz, "error", "I"); completionStatus_bytesTransferred = (*env)->GetFieldID(env, clazz, "bytesTransferred", "I"); - completionStatus_completionKey = (*env)->GetFieldID(env, clazz, "completionKey", "I"); + completionStatus_completionKey = (*env)->GetFieldID(env, clazz, "completionKey", "J"); clazz = (*env)->FindClass(env, "sun/nio/fs/WindowsNativeDispatcher$BackupResult"); if (clazz == NULL) { @@ -1169,12 +1169,11 @@ JNIEXPORT jlong JNICALL Java_sun_nio_fs_WindowsNativeDispatcher_CreateIoCompletionPort(JNIEnv* env, jclass this, - jlong fileHandle, jlong existingPort, jint completionKey) + jlong fileHandle, jlong existingPort, jlong completionKey) { - ULONG_PTR ck = completionKey; HANDLE port = CreateIoCompletionPort((HANDLE)jlong_to_ptr(fileHandle), (HANDLE)jlong_to_ptr(existingPort), - ck, + (ULONG_PTR)completionKey, 0); if (port == NULL) { throwWindowsException(env, GetLastError()); @@ -1203,21 +1202,20 @@ (*env)->SetIntField(env, obj, completionStatus_error, ioResult); (*env)->SetIntField(env, obj, completionStatus_bytesTransferred, (jint)bytesTransferred); - (*env)->SetIntField(env, obj, completionStatus_completionKey, - (jint)completionKey); - + (*env)->SetLongField(env, obj, completionStatus_completionKey, + (jlong)completionKey); } } JNIEXPORT void JNICALL Java_sun_nio_fs_WindowsNativeDispatcher_PostQueuedCompletionStatus(JNIEnv* env, jclass this, - jlong completionPort, jint completionKey) + jlong completionPort, jlong completionKey) { BOOL res; res = PostQueuedCompletionStatus((HANDLE)jlong_to_ptr(completionPort), (DWORD)0, /* dwNumberOfBytesTransferred */ - (DWORD)completionKey, + (ULONG_PTR)completionKey, NULL); /* lpOverlapped */ if (res == 0) { throwWindowsException(env, GetLastError()); @@ -1232,7 +1230,17 @@ BOOL res; BOOL subtree = (watchSubTree == JNI_TRUE) ? TRUE : FALSE; - ((LPOVERLAPPED)jlong_to_ptr(pOverlapped))->hEvent = NULL; + /* Any unused members of [OVERLAPPED] structure should always be initialized to zero + before the structure is used in a function call. + Otherwise, the function may fail and return ERROR_INVALID_PARAMETER. + http://msdn.microsoft.com/en-us/library/windows/desktop/ms684342%28v=vs.85%29.aspx + + The [Offset] and [OffsetHigh] members of this structure are not used. + http://msdn.microsoft.com/en-us/library/windows/desktop/aa365465%28v=vs.85%29.aspx + + [hEvent] should be zero, other fields are the return values. */ + ZeroMemory((LPOVERLAPPED)jlong_to_ptr(pOverlapped), sizeof(OVERLAPPED)); + res = ReadDirectoryChangesW((HANDLE)jlong_to_ptr(hDirectory), (LPVOID)jlong_to_ptr(bufferAddress), (DWORD)bufferLength,