139 lines
4.7 KiB
C
139 lines
4.7 KiB
C
/*++
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Copyright(c) 1998,99 Microsoft Corporation
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Module Name:
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log.c
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Abstract:
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Windows Load Balancing Service (WLBS)
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Driver - event logging support
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Author:
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kyrilf
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--*/
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#include <ntddk.h>
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#include "log.h"
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#include "univ.h"
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/* PROCEDURES */
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BOOLEAN Log_event (
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NTSTATUS code,
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PWSTR msg1,
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PWSTR msg2,
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PWSTR msg3,
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PWSTR msg4,
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ULONG loc,
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ULONG d1,
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ULONG d2,
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ULONG d3,
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ULONG d4)
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{
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PIO_ERROR_LOG_PACKET ErrorLogEntry;
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UNICODE_STRING ErrorStr[4];
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PWCHAR InsertStr;
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ULONG EntrySize;
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ULONG BytesLeft;
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ULONG i;
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RtlInitUnicodeString(&ErrorStr[0], msg1);
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RtlInitUnicodeString(&ErrorStr[1], msg2);
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RtlInitUnicodeString(&ErrorStr[2], msg3);
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RtlInitUnicodeString(&ErrorStr[3], msg4);
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/* Remember the insertion string should be NUL terminated. So we allocate the
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extra space of WCHAR. The first parameter to IoAllocateErrorLogEntry can
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be either the driver object or the device object. If it is given a device
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object, the name of the device (used in IoCreateDevice) will show up in the
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place of %1 in the message. See the message file (.mc) for more details. */
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EntrySize = sizeof(IO_ERROR_LOG_PACKET) + LOG_NUMBER_DUMP_DATA_ENTRIES * sizeof (ULONG) +
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ErrorStr[0].Length + ErrorStr[1].Length + ErrorStr[2].Length + ErrorStr[3].Length + 4 * sizeof(WCHAR);
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/* Truncate the size if necessary. */
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if (EntrySize > ERROR_LOG_MAXIMUM_SIZE) {
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if (ERROR_LOG_MAXIMUM_SIZE > (sizeof(IO_ERROR_LOG_PACKET) + LOG_NUMBER_DUMP_DATA_ENTRIES * sizeof (ULONG))) {
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UNIV_PRINT (("Log_event: log entry size too large, truncating: size=%u, max=%u", EntrySize, ERROR_LOG_MAXIMUM_SIZE));
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EntrySize = ERROR_LOG_MAXIMUM_SIZE;
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} else {
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UNIV_PRINT (("Log_event: log entry size too large, exiting: size=%u, max=%u", EntrySize, ERROR_LOG_MAXIMUM_SIZE));
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return FALSE;
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}
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}
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ErrorLogEntry = IoAllocateErrorLogEntry(univ_driver_ptr, (UCHAR)(EntrySize));
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if (ErrorLogEntry == NULL) {
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#if DBG
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/* Convert Unicode string to AnsiCode; %ls can only be used in PASSIVE_LEVEL. */
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CHAR AnsiString[64];
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for (i = 0; (i < sizeof(AnsiString) - 1) && (i < ErrorStr[0].Length); i++)
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AnsiString[i] = (CHAR)msg1[i];
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AnsiString[i] = '\0';
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UNIV_PRINT (("Log_event: error allocating log entry %s", AnsiString));
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#endif
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return FALSE;
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}
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ErrorLogEntry -> ErrorCode = code;
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ErrorLogEntry -> SequenceNumber = 0;
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ErrorLogEntry -> MajorFunctionCode = 0;
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ErrorLogEntry -> RetryCount = 0;
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ErrorLogEntry -> UniqueErrorValue = 0;
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ErrorLogEntry -> FinalStatus = STATUS_SUCCESS;
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ErrorLogEntry -> DumpDataSize = (LOG_NUMBER_DUMP_DATA_ENTRIES + 1) * sizeof (ULONG);
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ErrorLogEntry -> StringOffset = sizeof (IO_ERROR_LOG_PACKET) + LOG_NUMBER_DUMP_DATA_ENTRIES * sizeof (ULONG);
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ErrorLogEntry -> NumberOfStrings = 0;
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/* load the NUMBER_DUMP_DATA_ENTRIES plus location id here */
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ErrorLogEntry -> DumpData [0] = loc;
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ErrorLogEntry -> DumpData [1] = d1;
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ErrorLogEntry -> DumpData [2] = d2;
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ErrorLogEntry -> DumpData [3] = d3;
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ErrorLogEntry -> DumpData [4] = d4;
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/* Calculate the number of bytes available in the string storage area. */
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BytesLeft = EntrySize - ErrorLogEntry->StringOffset;
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/* Set a pointer to the beginning of the string storage area. */
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InsertStr = (PWCHAR)((PCHAR)ErrorLogEntry + ErrorLogEntry->StringOffset);
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/* Loop through all strings and put in as many as we can. */
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for (i = 0; i < 4, BytesLeft > 0; i++) {
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/* Find out how much of this string we can fit into the buffer - save room for the NUL character. */
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ULONG Length = (ErrorStr[i].Length <= (BytesLeft - sizeof(WCHAR))) ? ErrorStr[i].Length : BytesLeft - sizeof(WCHAR);
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/* Copy the number of characters that will fit. */
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RtlMoveMemory(InsertStr, ErrorStr[i].Buffer, Length);
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/* Put the NUL character at the end. */
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*(PWCHAR)((PCHAR)InsertStr + Length) = L'\0';
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/* Increment the number of strings successfully fit in the buffer. */
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ErrorLogEntry->NumberOfStrings++;
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/* Move the string pointer past the string. */
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InsertStr = (PWCHAR)((PCHAR)InsertStr + Length + sizeof(WCHAR));
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/* Calculate the number of bytes left now. */
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BytesLeft -= (Length + sizeof(WCHAR));
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}
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IoWriteErrorLogEntry(ErrorLogEntry);
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return TRUE;
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}
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