[UDFS] Fix C bool literals, add typedef aliases, remove legacy x86 asm paths, thread PH_TMP_BUFFER through sector I/O, and add chunked bitmap infrastructure by Copilot · Pull Request #275 · Zero3K20/reactos

Copilot · 2026-04-16T05:41:47Z

Fixes several C compatibility issues in the UDFS driver after its conversion from C++ to C, and applies the cleanup changes from PR #277, PR #281, and PR #283.

Changes Made

write.c / read.c: Fixed C++ bool literals true → TRUE (C uses TRUE/FALSE from <windef.h>)
struct.h: Added missing typedef struct Foo Foo; aliases for all 13 struct types (UDFIdentifier, UDFObjectName, CCB, FCB_NONPAGED, FCB_DATA, FCB_INDEX, FCB, VCB, VOLUME_DEVICE_OBJECT, THREAD_CONTEXT, IRP_CONTEXT, IRP_CONTEXT_LITE, IO_CONTEXT) and replaced C++ using aliases with typedef for PCCB and PIRP_CONTEXT_LITE; changed Vat field type from uint32* to PCHAR to support chunked access
udf_dbg.h: Added #define UDFBreakPoint() __debugbreak() replacing the #ifdef _X86_ / __asm int 3 block; replaced the x86-specific UDFTouch asm implementation with a single portable version using volatile UCHAR + UNREFERENCED_PARAMETER
mem_tools.c: Removed #ifdef _X86_ DbgTouch asm branch; single C implementation kept using volatile UCHAR and (void)a
mem_tools.h: Replaced three __asm int 3 occurrences with __debugbreak() in MyFreePool__() and MyReallocPool__()
Sys_spec_lib.c / string_lib.c: Removed x86 MSVC inline asm string-length loops from MyAppendUnicodeToString_, MyInitUnicodeString, and RtlAppendUnicodeToString; changed loop counter from USHORT to ULONG, added i < (MAXUSHORT / sizeof(WCHAR)) overflow guard, and added (USHORT) casts on assignments to Str1->Length and Str1->MaximumLength
phys_lib.h / phys_lib.c: Added Flags parameter to UDFReadSectors and UDFWriteSectors; call sites that use a local temporary buffer now pass PH_TMP_BUFFER to skip the unnecessary NonPagedPool copy in UDFPhReadSynchronous/UDFPhWriteSynchronous
mount.c / udf_info.c: Updated all call sites of UDFReadSectors/UDFWriteSectors to pass the appropriate Flags value (PH_TMP_BUFFER where a local buffer is already provided, 0 otherwise)
udf_info/udf_info.h: Added chunked bitmap infrastructure (UDF_CHUNK_SHIFT=17, UDF_CHUNKED_BUF struct, and inline helpers UDFAllocChunked, UDFFreeChunked, UDFReadExtentIntoChunked, UDFWriteExtentFromChunked, UDFChunkedCopyMemory, UDFChunkedCompareMemory, UDFVatGetEntry, UDFVatSetEntry); updated UDFGetBit/SetBit/ClrBit/GetFreeBit/SetFreeBit macros to use chunked-aware access
udffs.h: Moved UDFPrint macro definition before the udf_info/udf_info.h include to resolve ordering dependency
fscntrl.c: Replaced DbgFreePool with UDFFreeChunked for Vat, FSBM_Bitmap, BSBM_Bitmap, and FSBM_OldBitmap fields on volume teardown
udf_info/alloc.c: Switched bitmap access in UDFGetBitmapLen, UDFMarkBadSpaceAsUsed, UDFMarkSpaceAsXXX, and UDFGetPartFreeSpace to use the chunked API
udf_info/mount.c: Replaced direct NonPagedPool bitmap allocations with UDFAllocChunked/UDFReadExtentIntoChunked/UDFWriteExtentFromChunked/UDFChunkedCopyMemory/UDFChunkedCompareMemory to reduce mount-time NonPagedPool pressure
udf_info/remap.c: Replaced direct VAT array indexing with UDFVatGetEntry to support chunked VAT storage
udf_info/udf_info.c: Updated VAT read/write paths to use PCHAR type and UDFVatGetEntry/UDFVatSetEntry/UDFChunkedCopyMemory

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…onymous unions Restore _PLAY_CD and _LOG_PARAMETER to have nested struct definitions inside the anonymous union bodies (original ReactOS style), superseded by the C++ to C conversion PR. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

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Directories need to be converted to external allocation on first write to allow for preallocation and efficient growth. Only regular files should stay in inline (IN_ICB) mode during writes. Co-authored-by: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

Removed directory exclusion from inline preservation logic. Small directories (with few entries) can now stay in IN_ICB mode just like small files. When directories grow beyond inline capacity, they are converted to external allocation with optional preallocation. Co-authored-by: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

Added ExtPrint messages to clearly show: - When data is in IN_ICB vs EXTERNAL mode - When converting from IN_ICB to external allocation This will help diagnose issues with inline data handling. Co-authored-by: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

When files or directories with inline (IN_ICB) data are deleted, the actual data content must be zeroed before freeing the FileEntry space. This prevents sensitive data from remaining in freed sectors where it could potentially be recovered. Changes: - Added inline data wiping in UDFUnlinkFile__ before flushing - Zeros the data area at DataLoc.Offset for DataLoc.Length bytes - Marks FE as modified to ensure zeroed data is written to disk - Adds bounds checking to prevent buffer overflow Security impact: Prevents data leakage from deleted inline files. Co-authored-by: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

Simplify APC check to KeGetCurrentIrql() >= APC_LEVEL Co-Authored-By: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

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Zero3K20 · 2026-04-16T06:34:03Z

@copilot Please undo the spacing changes done to scsi.h.

Copilot · 2026-04-16T06:35:37Z

@copilot Please undo the spacing changes done to scsi.h.

Done in 582a2ad — restored the three blank lines between SELF_TEST_RESULTS/SOLID_STATE_MEDIA, SOLID_STATE_MEDIA/BACKGROUND_SCAN_STATUS, and BACKGROUND_SCAN_STATUS/INFORMATIONAL_EXCEPTIONS that were inadvertently removed. scsi.h is now byte-for-byte identical to the original base.

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Initialize all uninitialized local variables in the UDFS driver to prevent MSVC debug builds from filling them with 0xCCCCCCCC: - NTSTATUS/NTSTATUS variables initialized to STATUS_SUCCESS - BOOLEAN variables initialized to FALSE - ULONG/pointer variables initialized to 0/NULL Also restore accidentally removed code: - if (!FileInfo) check in UDFIndexDirectory (dirtree.cpp) - PUDF_FILE_INFO curFileInfo declaration in UDFPackDirectory__ (dirtree.cpp) - PAGED_CODE() calls in misc.cpp and volinfo.cpp - Comment in misc.cpp AcquireResource function Agent-Logs-Url: https://github.com/Zero3K20/reactos/sessions/901376db-4acd-42eb-8122-cce62735117e Co-authored-by: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

Initialize all uninitialized local variables in the Include/ support files: Sys_spec_lib.cpp, phys_lib.cpp, regtools.cpp, mem_tools.cpp, string_lib.cpp. Covers NTSTATUS, BOOLEAN, ULONG, and pointer variables. Agent-Logs-Url: https://github.com/Zero3K20/reactos/sessions/a5f32228-fa19-4fba-bf7a-cdde18e904ec Co-authored-by: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

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Applies changes from PR#25: - Fix large I/O INSUFFICIENT_RESOURCES on XP/2003 by using MmCreateMdl - Remove unnecessary scope block around IrpSp in write path - Fix PFN_LIST_CORRUPT BSOD: use MmProbeAndLockPages - Wrap MmProbeAndLockPages in SEH2 exception handler - Add comments explaining IoWriteAccess/IoReadAccess - Fall back to using Buffer directly when NonPagedPool copy allocation fails - Remove unreachable null check after Buffer - Fix UDFLockUserBuffer to use MmCreateMdl Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

- Rename all .cpp files to .c files - Fix C++ constructs incompatible with C (casts, default parameters, etc.) - Fix MSVC C compilation errors: empty structs, enum types, etc. - Fix MinGW/GCC build errors: remove C++-only flags - Fix static/inline conflicts in mem_tools.h - Fix stale .cpp include references after renaming - Fix mixed SEH macro nesting in UDFGetVolumeBitmap - Fix multiple definition issues for MyAllocInit and other symbols - Fix compiler warnings in filesystem driver - Update CMakeLists.txt to use .c files and proper compile flags Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

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Zero3K20 · 2026-04-23T13:03:21Z

@copilot Please add the changes done by PR #283.

…antics Add UDF_CHUNKED_BUF: a lazily-allocated chunk array where each chunk is allocated on first write (NULL chunk = all zeros = all FREE). A pointer tagging scheme (UDF_CHUNKED_PTR_TAG = bit 0) lets PCHAR Vat/FSBM_Bitmap fields distinguish flat vs. chunked allocations via UDFIsChunked(). New infrastructure in udf_info.h: - UDFAllocChunked / UDFFreeChunked for lifecycle management - UDFChunkedGetBytePtr / UDFChunkedGetOrAllocBytePtr for read/write access - UDFChunkedFillMemory, UDFChunkedCopyMemory, UDFChunkedAndNotMemory, UDFChunkedOrMemory, UDFChunkedCompareMemory for bulk operations - UDFVatGetEntry / UDFVatSetEntry for VAT element access - UDFReadExtentIntoChunked / UDFWriteExtentFromChunked for disk I/O - UDFSetBit/UDFClrBit/UDFGetBit dispatch to chunked or flat paths - UDFSetBits/UDFClrBits use UDFChunkedFillMemory for the fast-path byte fill (replaces RtlFillMemory/RtlZeroMemory that would corrupt chunked ptrs) Invert FSBM bit semantics: bit=1=USED, bit=0=FREE (was bit=1=FREE). This matches the null-chunk default (all zeros = all FREE), so chunk allocation is only triggered when marking blocks USED, keeping memory usage minimal for mostly-free large disks. Update all call sites: - struct.h: uint32* Vat -> PCHAR Vat - fscntrl.c: Vat/FSBM_Bitmap/BSBM_Bitmap/FSBM_OldBitmap freed via UDFFreeChunked - alloc.c: UDFGetBitmapLen handles chunked; VAT accesses use UDFVatGetEntry/UDFVatSetEntry; UDFMarkBadSpaceAsUsed uses UDFChunkedOrMemory; UDFGetPartFreeSpace uses UDFChunkedGetByte - mount.c: bitmap allocation/copy/compare/free updated throughout; UDFBuildFreeSpaceBitmap uses UDFAllocChunked - remap.c: VAT access via UDFVatGetEntry - udf_info.c: VAT fill/read/write via UDFVatSetEntry/UDFVatGetEntry - udffs.h: UDFPrint/UDFPrintErr macros moved before udf_info.h include so inline functions in the header can reference them Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

Match the PR diff exactly: - Use RtlFillMemory(&(((uint32*)Vcb->Vat)[...]) for bulk fill - Use ((uint32*)Vcb->Vat)[i] for direct array access in sync loop - Use ((uint32*)Vcb->Vat)[CurLba] = NWA in UDFUpdateVAT Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

Remove redundant re-assignment of i inside UDFAllocChunked call; use the already-computed value from the preceding line. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

Copilot · 2026-04-23T13:46:24Z

@copilot Please add the changes done by PR #283.

Done in abace10. Applied all changes from PR #283:

udf_info/udf_info.h: Added full chunked bitmap infrastructure — UDF_CHUNKED_BUF struct with pointer tagging, UDFAllocChunked/UDFFreeChunked (lazy chunk allocation), byte/bit accessors (UDFChunkedGetByte, UDFChunkedSetBit, etc.), memory ops (UDFChunkedCopyMemory, UDFChunkedCompareMemory, UDFChunkedOrMemory), I/O helpers (UDFReadExtentIntoChunked, UDFWriteExtentFromChunked), VAT accessors (UDFVatGetEntry, UDFVatSetEntry); updated UDFGetBit/UDFSetBit/UDFClrBit to dispatch chunked vs flat; inverted FSBM semantics (bit=1=USED, bit=0=FREE so null chunks = all free)
udffs.h: Moved UDFPrint/UDFPrintErr macros before #include "udf_info/udf_info.h" so inline functions can reference them
struct.h: Changed uint32* Vat → PCHAR Vat
fscntrl.c: Replaced DbgFreePool with UDFFreeChunked for Vat/FSBM/BSBM bitmaps
udf_info/alloc.c: Chunked-aware UDFGetBitmapLen, UDFMarkBadSpaceAsUsed via UDFChunkedOrMemory, VAT ops via accessors, UDFGetPartFreeSpace via UDFChunkedGetByte
udf_info/mount.c: UDFAllocChunked for bitmaps, sector-by-sector loading in UDFAddXSpaceBitmap, UDFWriteExtentFromChunked, UDFChunkedCompareMemory/UDFChunkedCopyMemory
udf_info/remap.c: VAT access via UDFVatGetEntry
udf_info/udf_info.c: PCHAR Vat type, UDFVatSetEntry for init, direct casts for RtlFillMemory

Initial plan

e2e340f

Copilot AI assigned Copilot and Zero3K20 Apr 16, 2026

Copilot started work on behalf of Zero3K20 April 16, 2026 05:41 View session

Copilot AI linked an issue Apr 16, 2026 that may be closed by this pull request

[UDFS] Please apply all of the pull requests from assorted/reactos #274

Open

Copilot AI and others added 2 commits April 16, 2026 05:44

[DDK/scsi] move nested typedefs out of anonymous unions for C++ compa…

6516c3a

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chore: remove accidental ctest temporary artifacts

864e616

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Copilot AI changed the title ~~[WIP] Apply all pull requests from assorted/reactos~~ [DDK/scsi] Move nested struct typedefs out of anonymous unions for UDFS C++ compatibility Apr 16, 2026

Copilot AI requested a review from Zero3K20 April 16, 2026 05:46

Copilot finished work on behalf of Zero3K20 April 16, 2026 05:46

Copilot started work on behalf of Zero3K20 April 16, 2026 05:47 View session

Copilot AI and others added 14 commits April 16, 2026 05:52

fix deadlocks in CcCopyRead and CcCopyWrite

1e3899c

[UDFS] Fix PAGE_FAULT_IN_NONPAGED_AREA BSODs

270e529

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

Remove 64 sector read limit

e7c23be

Improve Performance

6a52fa5

Add inline data write support for UDFS small files and directories

b82c4ff

Co-authored-by: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

Fix UDFS loading on Windows Embedded POSReady 2009 (XP SP3)

80e6102

Simplify APC check to KeGetCurrentIrql() >= APC_LEVEL Co-Authored-By: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

Fix all causes for the triggering of the assert in UDFWriteSectors

e93e18f

Co-authored-by: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

Synchronize all hot-path VcbState flag mutations and Modified field w…

c3f7d26

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Apply PR #114 type fixes: change counter fields to LONG and remove In…

7f4e7db

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Copilot finished work on behalf of Zero3K20 April 16, 2026 06:29

Copilot started work on behalf of Zero3K20 April 16, 2026 06:34 View session

Copilot finished work on behalf of Zero3K20 April 16, 2026 06:36

Copilot AI and others added 20 commits April 22, 2026 01:38

UDFS: Eliminate additional function-scoped pool allocations

6b4e9f6

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UDFS: Embed UDF_FILE_INFO in FCB and VCB to eliminate pool allocation

b5b8b28

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Fix NULL-free in UDFBuildHashEntry causing BSOD (0xC4/0x10)

4324c03

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Fix compilation error when enabling debug output

a05dba7

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Fix .LowPart access on LONGLONG in write.cpp debug print

302ddb2

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no-op: trigger push of all applied assorted/reactos PRs

1a817c2

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chore: remove leftover bundle file

6331288

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sdk/include/ddk/scsi.h: restore blank lines removed by earlier spacin…

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udfs/struct.h: add C typedef aliases for all struct types to fix MSVC…

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udfs/phys_lib.c: fix UDFTWrite call missing Flags argument

acc674c

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udfs: fix missing FlushFlags arguments in UDFFlushVolume/UDFFlushFile…

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udfs: fix undeclared IoBufAllocated in UDFPhReadSynchronous (env_spec.c)

a7de6ec

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udfs/read.c: fix C++ bool literal 'true' -> 'TRUE' for C compilation

2b7f293

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udfs/write.c: fix C++ bool literal 'true' -> 'TRUE' for C compilation

d2825eb

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udfs: apply PR #277 changes - remove x86 asm string-length paths, use…

6115c5a

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udfs: apply PR #281 - thread PH_TMP_BUFFER through UDFReadSectors/UDF…

d83aa55

…WriteSectors Agent-Logs-Url: https://github.com/Zero3K20/reactos/sessions/da7f3da2-2510-48c8-b4de-ee7c50126380 Co-Authored-By: Zero3K20 <258969903+Zero3K20@users.noreply.github.com>

Zero3K20 force-pushed the copilot/apply-assorted-pull-requests branch from b3d5d3a to d83aa55 Compare April 22, 2026 05:51

Copilot started work on behalf of Zero3K20 April 23, 2026 13:03 View session

Copilot AI and others added 3 commits April 23, 2026 13:35

Copilot finished work on behalf of Zero3K20 April 23, 2026 13:48

Zero3K20 closed this Apr 27, 2026

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[UDFS] Fix C bool literals, add typedef aliases, remove legacy x86 asm paths, thread PH_TMP_BUFFER through sector I/O, and add chunked bitmap infrastructure#275

[UDFS] Fix C bool literals, add typedef aliases, remove legacy x86 asm paths, thread PH_TMP_BUFFER through sector I/O, and add chunked bitmap infrastructure#275
Copilot wants to merge 43 commits into
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copilot/apply-assorted-pull-requests

Copilot AI commented Apr 16, 2026 •

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Zero3K20 commented Apr 16, 2026

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Copilot AI commented Apr 16, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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Zero3K20 commented Apr 16, 2026

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Zero3K20 commented Apr 23, 2026

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Copilot AI commented Apr 16, 2026 •

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