[pschweitzer] 64316: [NTFS] - Divert NtfsLookupFile() as NtfsLookupFileAt() to allow opening relatives to a current MFT record. - Reimplement NtfsLookupFile() using NtfsLookupFileAt()

Author: pschweitzer
Date: Fri Sep 26 18:12:24 2014
New Revision: 64316

URL: http://svn.reactos.org/svn/reactos?rev=64316&view=rev
Log:
[NTFS]
- Divert NtfsLookupFile() as NtfsLookupFileAt() to allow opening relatives to a current
MFT record.
- Reimplement NtfsLookupFile() using NtfsLookupFileAt()

Modified:
    trunk/reactos/drivers/filesystems/ntfs/mft.c
    trunk/reactos/drivers/filesystems/ntfs/ntfs.h

Modified: trunk/reactos/drivers/filesystems/ntfs/mft.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/ntfs/m…
==============================================================================
--- trunk/reactos/drivers/filesystems/ntfs/mft.c	[iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/ntfs/mft.c	[iso-8859-1] Fri Sep 26 18:12:24 2014
@@ -645,54 +645,62 @@
 }
 
 NTSTATUS
+NtfsLookupFileAt(PDEVICE_EXTENSION Vcb,
+                 PUNICODE_STRING PathName,
+                 PFILE_RECORD_HEADER *FileRecord,
+                 PNTFS_ATTR_CONTEXT *DataContext,
+                 ULONGLONG CurrentMFTIndex)
+{
+    UNICODE_STRING Current, Remaining;
+    NTSTATUS Status;
+
+    DPRINT1("NtfsLookupFileAt(%p, %wZ, %p, %p, %I64x)\n", Vcb, PathName,
FileRecord, DataContext, CurrentMFTIndex);
+
+    FsRtlDissectName(*PathName, &Current, &Remaining);
+
+    while (Current.Length != 0)
+    {
+        DPRINT1("Lookup: %wZ\n", &Current);
+
+        Status = NtfsFindMftRecord(Vcb, CurrentMFTIndex, &Current,
&CurrentMFTIndex);
+        if (!NT_SUCCESS(Status))
+        {
+            return Status;
+        }
+
+        FsRtlDissectName(*PathName, &Current, &Remaining);
+    }
+
+    *FileRecord = ExAllocatePoolWithTag(NonPagedPool,
Vcb->NtfsInfo.BytesPerFileRecord, TAG_NTFS);
+    if (*FileRecord == NULL)
+    {
+        DPRINT("NtfsLookupFile: Can't allocate MFT record\n");
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    Status = ReadFileRecord(Vcb, CurrentMFTIndex, *FileRecord);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT("NtfsLookupFile: Can't read MFT record\n");
+        return Status;
+    }
+
+    Status = FindAttribute(Vcb, *FileRecord, AttributeData, PathName, DataContext);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT("NtfsLookupFile: Can't find data attribute\n");
+        return Status;
+    }
+
+    return STATUS_SUCCESS;
+}
+
+NTSTATUS
 NtfsLookupFile(PDEVICE_EXTENSION Vcb,
                PUNICODE_STRING PathName,
                PFILE_RECORD_HEADER *FileRecord,
                PNTFS_ATTR_CONTEXT *DataContext)
 {
-    ULONGLONG CurrentMFTIndex;
-    UNICODE_STRING Current, Remaining;
-    NTSTATUS Status;
-
-    DPRINT1("NtfsLookupFile(%p, %wZ, %p)\n", Vcb, PathName, FileRecord);
-
-    CurrentMFTIndex = NTFS_FILE_ROOT;
-    FsRtlDissectName(*PathName, &Current, &Remaining);
-
-    while (Current.Length != 0)
-    {
-        DPRINT1("Lookup: %wZ\n", &Current);
-
-        Status = NtfsFindMftRecord(Vcb, CurrentMFTIndex, &Current,
&CurrentMFTIndex);
-        if (!NT_SUCCESS(Status))
-        {
-            return Status;
-        }
-
-        FsRtlDissectName(*PathName, &Current, &Remaining);
-    }
-
-    *FileRecord = ExAllocatePoolWithTag(NonPagedPool,
Vcb->NtfsInfo.BytesPerFileRecord, TAG_NTFS);
-    if (*FileRecord == NULL)
-    {
-        DPRINT("NtfsLookupFile: Can't allocate MFT record\n");
-        return STATUS_INSUFFICIENT_RESOURCES;
-    }
-
-    Status = ReadFileRecord(Vcb, CurrentMFTIndex, *FileRecord);
-    if (!NT_SUCCESS(Status))
-    {
-        DPRINT("NtfsLookupFile: Can't read MFT record\n");
-        return Status;
-    }
-
-    Status = FindAttribute(Vcb, *FileRecord, AttributeData, PathName, DataContext);
-    if (!NT_SUCCESS(Status))
-    {
-        DPRINT("NtfsLookupFile: Can't find data attribute\n");
-        return Status;
-    }
-
-    return STATUS_SUCCESS;
+    return NtfsLookupFileAt(Vcb, PathName, FileRecord, DataContext, NTFS_FILE_ROOT);
 }
 /* EOF */

Modified: trunk/reactos/drivers/filesystems/ntfs/ntfs.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/ntfs/n…
==============================================================================
--- trunk/reactos/drivers/filesystems/ntfs/ntfs.h	[iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/ntfs/ntfs.h	[iso-8859-1] Fri Sep 26 18:12:24 2014
@@ -634,6 +634,13 @@
                PFILE_RECORD_HEADER *FileRecord,
                PNTFS_ATTR_CONTEXT *DataContext);
 
+NTSTATUS
+NtfsLookupFileAt(PDEVICE_EXTENSION Vcb,
+                 PUNICODE_STRING PathName,
+                 PFILE_RECORD_HEADER *FileRecord,
+                 PNTFS_ATTR_CONTEXT *DataContext,
+                 ULONGLONG CurrentMFTIndex);
+
 /* misc.c */
 
 BOOLEAN