[ros-diffs] [turner] 20157: Implement system handling of page file
creation sizes. Thanks to arty and insulanus for helping me
along the way.
turner at svn.reactos.com
turner at svn.reactos.com
Wed Dec 14 02:59:23 CET 2005
Implement system handling of page file creation sizes. Thanks to arty
and insulanus for helping me along the way.
Modified: trunk/reactos/subsys/smss/initpage.c
_____
Modified: trunk/reactos/subsys/smss/initpage.c
--- trunk/reactos/subsys/smss/initpage.c 2005-12-13 23:10:34 UTC
(rev 20156)
+++ trunk/reactos/subsys/smss/initpage.c 2005-12-14 01:59:19 UTC
(rev 20157)
@@ -28,66 +28,163 @@
#define NDEBUG
#include <debug.h>
+#define GIGABYTE (1024 * 1024 * 1024) /* One Gigabyte */
+
static NTSTATUS STDCALL
SmpPagingFilesQueryRoutine(PWSTR ValueName,
- ULONG ValueType,
- PVOID ValueData,
- ULONG ValueLength,
- PVOID Context,
- PVOID EntryContext)
+ ULONG ValueType,
+ PVOID ValueData,
+ ULONG ValueLength,
+ PVOID Context,
+ PVOID EntryContext)
{
- UNICODE_STRING FileName;
- LARGE_INTEGER InitialSize;
- LARGE_INTEGER MaximumSize;
- NTSTATUS Status;
- LPWSTR p;
+ UNICODE_STRING FileName;
+ LARGE_INTEGER InitialSize;
+ LARGE_INTEGER MaximumSize;
+ NTSTATUS Status = STATUS_SUCCESS;
+ LPWSTR p;
+ WCHAR RootDriveLetter[5];
- DPRINT("ValueName '%S' Type %lu Length %lu\n", ValueName,
ValueType, ValueLength);
- DPRINT("ValueData '%S'\n", (PWSTR)ValueData);
- if (ValueType != REG_SZ)
- {
- return(STATUS_SUCCESS);
- }
+ DPRINT("ValueName '%S' Type %lu Length %lu\n", ValueName,
ValueType, ValueLength);
+ DPRINT("ValueData '%S'\n", (PWSTR)ValueData);
- /*
+ if (ValueType != REG_SZ)
+ {
+ return STATUS_INVALID_PARAMETER_2;
+ }
+
+ if (!RtlDosPathNameToNtPathName_U ((LPWSTR)ValueData,
+ &FileName,
+ NULL,
+ NULL))
+ {
+ return STATUS_OBJECT_PATH_NOT_FOUND;
+ }
+ /*
* Format: "<path>[ <initial_size>[ <maximum_size>]]"
*/
- if ((p = wcschr(ValueData, ' ')) != NULL)
- {
+ if ((p = wcschr(ValueData, ' ')) != NULL)
+ {
*p = L'\0';
InitialSize.QuadPart = wcstoul(p + 1, &p, 0) * 256 * 4096;
if (*p == ' ')
- {
- MaximumSize.QuadPart = wcstoul(p + 1, NULL, 0) * 256 * 4096;
- }
+ {
+ MaximumSize.QuadPart = wcstoul(p + 1, NULL, 0) * 256 * 4096;
+ }
else
- MaximumSize = InitialSize;
- }
- else
- {
- InitialSize.QuadPart = 50 * 4096;
- MaximumSize.QuadPart = 80 * 4096;
- }
+ MaximumSize = InitialSize;
+ }
- if (!RtlDosPathNameToNtPathName_U ((LPWSTR)ValueData,
- &FileName,
- NULL,
- NULL))
- {
- return (STATUS_SUCCESS);
- }
+ /* If there is only a file name or if initial and max are both 0
+ the system will pick the sizes. 10% and 20% for initial and max
+ respectivly. There is a max of 1 gig before it doesnt make it
+ bigger. */
+ if((InitialSize.QuadPart == 0 && MaximumSize.QuadPart == 0) || p ==
NULL)
+ {
+ FILE_FS_SIZE_INFORMATION FileFsSize;
+ IO_STATUS_BLOCK IoStatusBlock;
+ HANDLE hFile;
+ UNICODE_STRING NtPathU;
+ LARGE_INTEGER FreeBytes;
+ OBJECT_ATTRIBUTES ObjectAttributes;
- DPRINT("SMSS: Created paging file %wZ with size %dKB\n",
- &FileName, InitialSize.QuadPart / 1024);
- Status = NtCreatePagingFile(&FileName,
- &InitialSize,
- &MaximumSize,
- 0);
+ DPRINT("System managed pagefile...\n");
+ /* Make sure the path that is given for the file actually has the
drive in it.
+ At this point if there is not file name, no sizes will be set
therefore no page
+ file will be created */
+ if (wcslen(((PWSTR)ValueData)) > 2 &&
+ ((PWSTR)ValueData)[1] == L':' &&
+ ((PWSTR)ValueData)[2] == L'\\')
+ {
+ /* copy the drive letter, the colon and the slash,
+ tack a null on the end */
+ p = ((PWSTR)ValueData);
+ wcsncpy(RootDriveLetter,p,3);
+ wcscat(RootDriveLetter,L"\0");
+ DPRINT("At least X:\\...%S\n",RootDriveLetter);
- RtlFreeUnicodeString(&FileName);
+ if (!RtlDosPathNameToNtPathName_U((LPWSTR)RootDriveLetter,
+ &NtPathU,
+ NULL,
+ NULL))
+ {
+ DPRINT("Invalid path\n");
+ return STATUS_OBJECT_PATH_NOT_FOUND;
+ }
- return(STATUS_SUCCESS);
+ InitializeObjectAttributes(&ObjectAttributes,
+ &NtPathU,
+ FILE_READ_ATTRIBUTES,
+ NULL,
+ NULL);
+
+ /* Get a handle to the root to find the free space on the
drive */
+ Status = NtCreateFile (&hFile,
+ FILE_GENERIC_READ,
+ &ObjectAttributes,
+ &IoStatusBlock,
+ NULL,
+ 0,
+ FILE_SHARE_READ,
+ FILE_OPEN,
+ 0,
+ NULL,
+ 0);
+
+ RtlFreeUnicodeString(&NtPathU);
+
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT ("Invalid handle\n");
+ return Status;
+ }
+
+ Status = NtQueryVolumeInformationFile(hFile,
+ &IoStatusBlock,
+ &FileFsSize,
+
sizeof(FILE_FS_SIZE_INFORMATION),
+ FileFsSizeInformation);
+
+ FreeBytes.QuadPart = FileFsSize.BytesPerSector *
+ FileFsSize.SectorsPerAllocationUnit *
+
FileFsSize.AvailableAllocationUnits.QuadPart;
+
+ DPRINT ("Free:%d\n",FreeBytes.QuadPart);
+
+ /* Set by percentage */
+ InitialSize.QuadPart = FreeBytes.QuadPart / 10;
+ MaximumSize.QuadPart = FreeBytes.QuadPart / 5;
+
+ /* The page file is more then a gig, size it down */
+ if (InitialSize.QuadPart > GIGABYTE)
+ {
+ InitialSize.QuadPart = GIGABYTE;
+ MaximumSize.QuadPart = GIGABYTE;
+ }
+
+ ZwClose(hFile);
+ }
+ else
+ {
+ /* No page file will be created,
+ but we return succes because that
+ is what the setting wants */
+ return (STATUS_SUCCESS);
+ }
+ }
+
+ DPRINT("SMSS: Created paging file %wZ with size %dKB\n",
+ &FileName, InitialSize.QuadPart / 1024);
+
+ Status = NtCreatePagingFile(&FileName,
+ &InitialSize,
+ &MaximumSize,
+ 0);
+
+ RtlFreeUnicodeString(&FileName);
+
+ return Status;
}
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