[reactos] 01/01: [NTOS:KD] KdpDebugLogInit: Fix ZwCreateFile flags for appending to debug logging file.

[Hermès Bélusca-Maïto]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=a49732e5b650bef2c05126...

commit a49732e5b650bef2c051260e78228e0eefa62b67
Author:     Hermès Bélusca-Maïto [e-mail]
AuthorDate: Mon Jan 9 20:42:11 2023 +0100
Commit:     Hermès Bélusca-Maïto [e-mail]
CommitDate: Thu Mar 9 18:59:16 2023 +0100

[NTOS:KD] KdpDebugLogInit: Fix ZwCreateFile flags for appending to debug logging file.

However, ReactOS currently doesn't handle FILE_APPEND_DATA correctly,
    so temporarily add a hack for fixing its support.

CORE-18789
---
 ntoskrnl/kd/kdio.c | 38 ++++++++++++++++++++++++++++++++++++--
 1 file changed, 36 insertions(+), 2 deletions(-)

diff --git a/ntoskrnl/kd/kdio.c b/ntoskrnl/kd/kdio.c
index c186e60752d..742121e08fb 100644
--- a/ntoskrnl/kd/kdio.c
+++ b/ntoskrnl/kd/kdio.c
@@ -272,8 +272,9 @@ KdpDebugLogInit(
                               NULL,
                               FILE_ATTRIBUTE_NORMAL,
                               FILE_SHARE_READ,
-                              FILE_SUPERSEDE,
-                              FILE_WRITE_THROUGH | FILE_SYNCHRONOUS_IO_NONALERT,
+                              FILE_OPEN_IF,
+                              FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT |
+                                FILE_SEQUENTIAL_ONLY | FILE_WRITE_THROUGH,
                               NULL,
                               0);

@@ -285,6 +286,39 @@ KdpDebugLogInit(
             return;
         }

+        /**    HACK for FILE_APPEND_DATA     **
+         ** Remove once CORE-18789 is fixed. **
+         ** Enforce to go to the end of file **/
+        {
+            FILE_STANDARD_INFORMATION FileInfo;
+            FILE_POSITION_INFORMATION FilePosInfo;
+
+            Status = ZwQueryInformationFile(KdpLogFileHandle,
+                                            &Iosb,
+                                            &FileInfo,
+                                            sizeof(FileInfo),
+                                            FileStandardInformation);
+            DPRINT("Status: 0x%08lx - EOF offset: %I64d\n",
+                    Status, FileInfo.EndOfFile.QuadPart);
+
+            Status = ZwQueryInformationFile(KdpLogFileHandle,
+                                            &Iosb,
+                                            &FilePosInfo,
+                                            sizeof(FilePosInfo),
+                                            FilePositionInformation);
+            DPRINT("Status: 0x%08lx - Position: %I64d\n",
+                    Status, FilePosInfo.CurrentByteOffset.QuadPart);
+
+            FilePosInfo.CurrentByteOffset.QuadPart = FileInfo.EndOfFile.QuadPart;
+            Status = ZwSetInformationFile(KdpLogFileHandle,
+                                          &Iosb,
+                                          &FilePosInfo,
+                                          sizeof(FilePosInfo),
+                                          FilePositionInformation);
+            DPRINT("ZwSetInformationFile(FilePositionInfo) returned: 0x%08lx\n", Status);
+        }
+        /** END OF HACK **/
+
         KeInitializeEvent(&KdpLoggerThreadEvent, SynchronizationEvent, TRUE);

/* Create the logger thread */