From f3bf535104a6413b46ab5bb2d5ed1b8e0aba9d1a Mon Sep 17 00:00:00 2001
From: Magnus Olsen <magnus@greatlord.com>
Date: Sun, 7 May 2006 18:50:18 +0000
Subject: [PATCH] bug 1457: patch by w3seek : VFAT: Implement FileEaInformation
 for FAT32

svn path=/trunk/; revision=21839
---
 reactos/drivers/filesystems/vfat/direntry.c |  4 +-
 reactos/drivers/filesystems/vfat/finfo.c    | 53 +++++++++++++++++++--
 reactos/drivers/filesystems/vfat/vfat.h     | 41 +++++++++++++++-
 3 files changed, 91 insertions(+), 7 deletions(-)

diff --git a/reactos/drivers/filesystems/vfat/direntry.c b/reactos/drivers/filesystems/vfat/direntry.c
index f18d6b29c09..3dda26a5db0 100644
--- a/reactos/drivers/filesystems/vfat/direntry.c
+++ b/reactos/drivers/filesystems/vfat/direntry.c
@@ -21,8 +21,8 @@ vfatDirEntryGetFirstCluster (PDEVICE_EXTENSION  pDeviceExt,
 
   if (pDeviceExt->FatInfo.FatType == FAT32)
   {
-    cluster = pFatDirEntry->Fat.FirstCluster +
-      pFatDirEntry->Fat.FirstClusterHigh * 65536;
+    cluster = pFatDirEntry->Fat.FirstCluster |
+              (pFatDirEntry->Fat.FirstClusterHigh << 16);
   }
   else if (pDeviceExt->Flags & VCB_IS_FATX)
   {
diff --git a/reactos/drivers/filesystems/vfat/finfo.c b/reactos/drivers/filesystems/vfat/finfo.c
index 1b593e10d0a..055e097d6ec 100644
--- a/reactos/drivers/filesystems/vfat/finfo.c
+++ b/reactos/drivers/filesystems/vfat/finfo.c
@@ -444,6 +444,28 @@ VfatGetNetworkOpenInformation(PVFATFCB Fcb,
 }
 
 
+static NTSTATUS
+VfatGetEaInformation(PFILE_OBJECT FileObject,
+		     PVFATFCB Fcb,
+		     PDEVICE_OBJECT DeviceObject,
+		     PFILE_EA_INFORMATION Info,
+		     PULONG BufferLength)
+{
+    PDEVICE_EXTENSION DeviceExt = DeviceObject->DeviceExtension;
+
+    /* FIXME - use SEH to access the buffer! */
+    Info->EaSize = 0;
+    *BufferLength -= sizeof(*Info);
+    if (DeviceExt->FatInfo.FatType == FAT12 ||
+        DeviceExt->FatInfo.FatType == FAT16)
+    {
+        /* FIXME */
+        DPRINT1("VFAT: FileEaInformation not implemented!\n");
+    }
+    return STATUS_SUCCESS;
+}
+
+
 static NTSTATUS
 VfatGetAllInformation(PFILE_OBJECT FileObject,
 		      PVFATFCB Fcb,
@@ -585,8 +607,16 @@ VfatSetAllocationSizeInformation(PFILE_OBJECT FileObject,
       }
       else
       {
-        Fcb->entry.Fat.FirstCluster = (unsigned short)(FirstCluster & 0x0000FFFF);
-        Fcb->entry.Fat.FirstClusterHigh = (unsigned short)((FirstCluster & 0xFFFF0000) >> 16);
+        if (DeviceExt->FatInfo.FatType == FAT32)
+        {
+          Fcb->entry.Fat.FirstCluster = (unsigned short)(FirstCluster & 0x0000FFFF);
+          Fcb->entry.Fat.FirstClusterHigh = FirstCluster >> 16;
+        }
+        else
+        {
+            ASSERT((FirstCluster >> 16) == 0);
+            Fcb->entry.Fat.FirstCluster = (unsigned short)(FirstCluster & 0x0000FFFF);
+        }
       }
     }
     else
@@ -670,8 +700,15 @@ VfatSetAllocationSizeInformation(PFILE_OBJECT FileObject,
       }
       else
       {
-        Fcb->entry.Fat.FirstCluster = 0;
-        Fcb->entry.Fat.FirstClusterHigh = 0;
+        if (DeviceExt->FatInfo.FatType == FAT32)
+        {
+          Fcb->entry.Fat.FirstCluster = 0;
+          Fcb->entry.Fat.FirstClusterHigh = 0;
+        }
+        else
+        {
+            Fcb->entry.Fat.FirstCluster = 0;
+        }
       }
 
       NCluster = Cluster = FirstCluster;
@@ -780,6 +817,14 @@ NTSTATUS VfatQueryInformation(PVFAT_IRP_CONTEXT IrpContext)
 				 &BufferLength);
       break;
 
+    case FileEaInformation:
+      RC = VfatGetEaInformation(IrpContext->FileObject,
+				FCB,
+				IrpContext->DeviceObject,
+				SystemBuffer,
+				&BufferLength);
+      break;
+
     case FileAlternateNameInformation:
       RC = STATUS_NOT_IMPLEMENTED;
       break;
diff --git a/reactos/drivers/filesystems/vfat/vfat.h b/reactos/drivers/filesystems/vfat/vfat.h
index d1f8f1d86a6..ec7a1dfc0f2 100644
--- a/reactos/drivers/filesystems/vfat/vfat.h
+++ b/reactos/drivers/filesystems/vfat/vfat.h
@@ -97,13 +97,52 @@ struct _FATDirEntry
   unsigned char  lCase;
   unsigned char  CreationTimeMs;
   unsigned short CreationTime,CreationDate,AccessDate;
-  unsigned short FirstClusterHigh;                      // higher
+  union
+  {
+    unsigned short FirstClusterHigh; // FAT32
+    unsigned short ExtendedAttributes; // FAT12/FAT16
+  };
   unsigned short UpdateTime;                            //time create/update
   unsigned short UpdateDate;                            //date create/update
   unsigned short FirstCluster;
   unsigned long  FileSize;
 };
 
+#define FAT_EAFILE  "EA DATA. SF"
+
+typedef struct _EAFileHeader FAT_EA_FILE_HEADER, *PFAT_EA_FILE_HEADER;
+
+struct _EAFileHeader
+{
+  unsigned short Signature; // ED
+  unsigned short Unknown[15];
+  unsigned short EASetTable[240];
+};
+
+typedef struct _EASetHeader FAT_EA_SET_HEADER, *PFAT_EA_SET_HEADER;
+
+struct _EASetHeader
+{
+  unsigned short Signature; // EA
+  unsigned short Offset; // relative offset, same value as in the EASetTable
+  unsigned short Unknown1[2];
+  char TargetFileName[12];
+  unsigned short Unknown2[3];
+  unsigned int EALength;
+  // EA Header
+};
+
+typedef struct _EAHeader FAT_EA_HEADER, *PFAT_EA_HEADER;
+
+struct _EAHeader
+{
+  unsigned char Unknown;
+  unsigned char EANameLength;
+  unsigned short EAValueLength;
+  // Name Data
+  // Value Data
+};
+
 typedef struct _FATDirEntry FAT_DIR_ENTRY, *PFAT_DIR_ENTRY;
 
 struct _FATXDirEntry