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[NTOS/FSRTL]

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- Implement FsRtlSplitLargeMcb. 168 tests executed / 59 failures.

svn path=/trunk/; revision=59348
This commit is contained in:
Aleksey Bragin 2013-06-27 09:18:32 +00:00
parent e329b10e5c
commit 793b193422
1 changed files with 43 additions and 3 deletions
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46
reactos/ntoskrnl/fsrtl/largemcb.c
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@ -975,11 +975,51 @@ FsRtlSplitBaseMcb(IN PBASE_MCB OpaqueMcb,
IN LONGLONG Vbn,
IN LONGLONG Amount)
{
//PBASE_MCB_INTERNAL Mcb = (PBASE_MCB_INTERNAL)OpaqueMcb;
PBASE_MCB_INTERNAL Mcb = (PBASE_MCB_INTERNAL)OpaqueMcb;
PLARGE_MCB_MAPPING_ENTRY Run, InsertLowerRun = NULL, ExistingRun = NULL;
LARGE_MCB_MAPPING_ENTRY LowerRun;
BOOLEAN NewElement;
UNIMPLEMENTED;
/* Traverse the tree */
for (Run = (PLARGE_MCB_MAPPING_ENTRY)RtlEnumerateGenericTable(&Mcb->Mapping->Table, TRUE);
Run;
Run = (PLARGE_MCB_MAPPING_ENTRY)RtlEnumerateGenericTable(&Mcb->Mapping->Table, FALSE))
{
/* unaffected run? */
/* FIXME: performance: effective skip of all 'lower' runs without traversing them */
if (Vbn >= Run->RunStartVbn.QuadPart) continue;
return FALSE;
/* crossing run to be split?
* 'lower_run' is created on the original place; just shortened.
* current 'run' is shifted up later
*/
if (Vbn < Run->RunEndVbn.QuadPart)
{
LowerRun = *Run;
LowerRun.RunEndVbn.QuadPart = Vbn;
/* FIXME: shift 'run->Lbn_start' ? */
Run->RunStartVbn.QuadPart = Vbn;
InsertLowerRun = &LowerRun;
}
/* Shift the current 'run'.
* Ordering is not changed in Generic Tree so I hope I do not need to reinsert it.
*/
Run->RunStartVbn.QuadPart += Amount;
ASSERT(Run->RunEndVbn.QuadPart + Amount > Run->RunEndVbn.QuadPart); /* overflow? */
Run->RunEndVbn.QuadPart += Amount;
/* FIXME: shift 'run->Lbn_start' ? */
/* continue the traversal */
}
if (InsertLowerRun)
ExistingRun = RtlInsertElementGenericTable(&Mcb->Mapping->Table, InsertLowerRun, sizeof(*InsertLowerRun), &NewElement);
ASSERT(ExistingRun == NULL);
return (InsertLowerRun != NULL); /* the hole was successfuly created? */
}
/*