[reactos] 01/01: [FREELDR] Allow booting from NTFS volume. (#3775)

[Vadim Galyant]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=d01f9489257e9e89528a5…

commit d01f9489257e9e89528a5d85af84bcd05d3cd87b
Author:     Vadim Galyant <vgal(a)rambler.ru>
AuthorDate: Sat Mar 19 17:44:42 2022 +0300
Commit:     GitHub <noreply(a)github.com>
CommitDate: Sat Mar 19 15:44:42 2022 +0100

    [FREELDR] Allow booting from NTFS volume. (#3775)
---
 boot/freeldr/freeldr/include/fs/ntfs.h | 8 ++++++--
 boot/freeldr/freeldr/lib/fs/ntfs.c     | 6 +++---
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/boot/freeldr/freeldr/include/fs/ntfs.h
b/boot/freeldr/freeldr/include/fs/ntfs.h
index b1915e79619..9aad54904d7 100644
--- a/boot/freeldr/freeldr/include/fs/ntfs.h
+++ b/boot/freeldr/freeldr/include/fs/ntfs.h
@@ -65,6 +65,8 @@
 #define NTFS_FILE_NAME_DOS            2
 #define NTFS_FILE_NAME_WIN32_AND_DOS        3
 
+#define NTFS_MFT_MASK 0x0000FFFFFFFFFFFFULL
+
 #include <pshpack1.h>
 typedef struct
 {
@@ -115,6 +117,8 @@ typedef struct
     ULONG        BytesAllocated;
     ULONGLONG        BaseMFTRecord;
     USHORT        NextAttributeInstance;
+    USHORT        Padding;                     // Align to 4 UCHAR boundary (NTFS 3.1+
(Windows XP and above))
+    ULONG        MFTRecordNumber;             // Number of this MFT Record (NTFS 3.1+
(Windows XP and above))
 } NTFS_MFT_RECORD, *PNTFS_MFT_RECORD;
 
 typedef struct
@@ -185,7 +189,7 @@ typedef struct
     USHORT        Reserved;
     UCHAR        FileNameLength;
     UCHAR        FileNameType;
-    WCHAR        FileName[0];
+    WCHAR        FileName[1];
 } NTFS_FILE_NAME_ATTR, *PNTFS_FILE_NAME_ATTR;
 
 typedef struct
@@ -197,7 +201,7 @@ typedef struct
     ULONGLONG    StartingVCN;
     ULONGLONG    BaseFileRef;
     USHORT        AttrId;
-    PWCHAR        Name;
+    WCHAR        Name[1];
 } NTFS_ATTR_LIST_ATTR, *PNTFS_ATTR_LIST_ATTR;
 
 typedef struct
diff --git a/boot/freeldr/freeldr/lib/fs/ntfs.c b/boot/freeldr/freeldr/lib/fs/ntfs.c
index 233a2e5ac23..c7e41c23ef8 100644
--- a/boot/freeldr/freeldr/lib/fs/ntfs.c
+++ b/boot/freeldr/freeldr/lib/fs/ntfs.c
@@ -505,7 +505,7 @@ VOID NtfsPrintFile(PNTFS_INDEX_ENTRY IndexEntry)
         AnsiFileName[i] = (CHAR)FileName[i];
     AnsiFileName[i] = 0;
 
-    TRACE("- %s (%x)\n", AnsiFileName,
IndexEntry->Data.Directory.IndexedFile);
+    TRACE("- %s (%x)\n", AnsiFileName,
(IndexEntry->Data.Directory.IndexedFile & NTFS_MFT_MASK));
 }
 #endif
 
@@ -596,7 +596,7 @@ static BOOLEAN NtfsFindMftRecord(PNTFS_VOLUME_INFO Volume, ULONGLONG
MFTIndex, P
         {
             if (NtfsCompareFileName(FileName, IndexEntry))
             {
-                *OutMFTIndex = IndexEntry->Data.Directory.IndexedFile;
+                *OutMFTIndex = (IndexEntry->Data.Directory.IndexedFile &
NTFS_MFT_MASK);
                 FrLdrTempFree(IndexRecord, TAG_NTFS_INDEX_REC);
                 FrLdrTempFree(MftRecord, TAG_NTFS_MFT);
                 return TRUE;
@@ -680,7 +680,7 @@ static BOOLEAN NtfsFindMftRecord(PNTFS_VOLUME_INFO Volume, ULONGLONG
MFTIndex, P
                     if (NtfsCompareFileName(FileName, IndexEntry))
                     {
                         TRACE("File found\n");
-                        *OutMFTIndex = IndexEntry->Data.Directory.IndexedFile;
+                        *OutMFTIndex = (IndexEntry->Data.Directory.IndexedFile &
NTFS_MFT_MASK);
                         FrLdrTempFree(BitmapData, TAG_NTFS_BITMAP);
                         FrLdrTempFree(IndexRecord, TAG_NTFS_INDEX_REC);
                         FrLdrTempFree(MftRecord, TAG_NTFS_MFT);