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- fixed access rights and shared access checks in IoSetShareAccess()

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- remove obsolete checks in IoCheckShareAccess() and IoUpdateShareAccess() to simplify them

svn path=/trunk/; revision=14223
This commit is contained in:
Thomas Bluemel 2005-03-20 15:54:22 +00:00
parent 8b9646ca2a
commit de138c3bb4
1 changed files with 69 additions and 154 deletions
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205
reactos/ntoskrnl/io/share.c
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@ -22,43 +22,20 @@ VOID STDCALL
IoUpdateShareAccess(PFILE_OBJECT FileObject,
PSHARE_ACCESS ShareAccess)
{
if ((FileObject->ReadAccess == FALSE) &&
(FileObject->WriteAccess == FALSE) &&
(FileObject->DeleteAccess == FALSE))
{
return;
}
PAGED_CODE();
if (FileObject->ReadAccess ||
FileObject->WriteAccess ||
FileObject->DeleteAccess)
{
ShareAccess->OpenCount++;
if (FileObject->ReadAccess == TRUE)
{
ShareAccess->Readers++;
}
if (FileObject->WriteAccess == TRUE)
{
ShareAccess->Writers++;
}
if (FileObject->DeleteAccess == TRUE)
{
ShareAccess->Deleters++;
}
if (FileObject->SharedRead == TRUE)
{
ShareAccess->SharedRead++;
}
if (FileObject->SharedWrite == TRUE)
{
ShareAccess->SharedWrite++;
}
if (FileObject->SharedDelete == TRUE)
{
ShareAccess->SharedDelete++;
ShareAccess->Readers += FileObject->ReadAccess;
ShareAccess->Writers += FileObject->WriteAccess;
ShareAccess->Deleters += FileObject->DeleteAccess;
ShareAccess->SharedRead += FileObject->SharedRead;
ShareAccess->SharedWrite += FileObject->SharedWrite;
ShareAccess->SharedDelete += FileObject->SharedDelete;
}
}
@ -80,84 +57,47 @@ IoCheckShareAccess(IN ACCESS_MASK DesiredAccess,
BOOLEAN SharedWrite;
BOOLEAN SharedDelete;
ReadAccess = (DesiredAccess & (FILE_READ_DATA | FILE_EXECUTE));
WriteAccess = (DesiredAccess & (FILE_WRITE_DATA | FILE_APPEND_DATA));
DeleteAccess = (DesiredAccess & DELETE);
PAGED_CODE();
ReadAccess = (DesiredAccess & (FILE_READ_DATA | FILE_EXECUTE)) != 0;
WriteAccess = (DesiredAccess & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0;
DeleteAccess = (DesiredAccess & DELETE) != 0;
FileObject->ReadAccess = ReadAccess;
FileObject->WriteAccess = WriteAccess;
FileObject->DeleteAccess = DeleteAccess;
if (!ReadAccess && !WriteAccess && !DeleteAccess)
if (ReadAccess || WriteAccess || DeleteAccess)
{
return(STATUS_SUCCESS);
}
SharedRead = (DesiredShareAccess & FILE_SHARE_READ);
SharedWrite = (DesiredShareAccess & FILE_SHARE_WRITE);
SharedDelete = (DesiredShareAccess & FILE_SHARE_DELETE);
SharedRead = (DesiredShareAccess & FILE_SHARE_READ) != 0;
SharedWrite = (DesiredShareAccess & FILE_SHARE_WRITE) != 0;
SharedDelete = (DesiredShareAccess & FILE_SHARE_DELETE) != 0;
FileObject->SharedRead = SharedRead;
FileObject->SharedWrite = SharedWrite;
FileObject->SharedDelete = SharedDelete;
if (ReadAccess)
if ((ReadAccess && (ShareAccess->SharedRead < ShareAccess->OpenCount)) ||
(WriteAccess && (ShareAccess->SharedWrite < ShareAccess->OpenCount)) ||
(DeleteAccess && (ShareAccess->SharedDelete < ShareAccess->OpenCount)) ||
((ShareAccess->Readers != 0) && !SharedRead) ||
((ShareAccess->Writers != 0) && !SharedWrite) ||
((ShareAccess->Deleters != 0) && !SharedDelete))
{
if (ShareAccess->SharedRead < ShareAccess->OpenCount)
return(STATUS_SHARING_VIOLATION);
}
if (WriteAccess)
{
if (ShareAccess->SharedWrite < ShareAccess->OpenCount)
return(STATUS_SHARING_VIOLATION);
}
if (DeleteAccess)
{
if (ShareAccess->SharedDelete < ShareAccess->OpenCount)
return(STATUS_SHARING_VIOLATION);
}
if (ShareAccess->Readers != 0)
{
if (SharedRead == FALSE)
return(STATUS_SHARING_VIOLATION);
}
if (ShareAccess->Writers != 0)
{
if (SharedWrite == FALSE)
return(STATUS_SHARING_VIOLATION);
}
if (ShareAccess->Deleters != 0)
{
if (SharedDelete == FALSE)
return(STATUS_SHARING_VIOLATION);
}
if (Update == TRUE)
if (Update)
{
ShareAccess->OpenCount++;
if (ReadAccess == TRUE)
ShareAccess->Readers++;
if (WriteAccess == TRUE)
ShareAccess->Writers++;
if (DeleteAccess == TRUE)
ShareAccess->Deleters++;
if (SharedRead == TRUE)
ShareAccess->SharedRead++;
if (SharedWrite == TRUE)
ShareAccess->SharedWrite++;
if (SharedDelete == TRUE)
ShareAccess->SharedDelete++;
ShareAccess->Readers += ReadAccess;
ShareAccess->Writers += WriteAccess;
ShareAccess->Deleters += DeleteAccess;
ShareAccess->SharedRead += SharedRead;
ShareAccess->SharedWrite += SharedWrite;
ShareAccess->SharedDelete += SharedDelete;
}
}
return(STATUS_SUCCESS);
@ -171,43 +111,20 @@ VOID STDCALL
IoRemoveShareAccess(IN PFILE_OBJECT FileObject,
IN PSHARE_ACCESS ShareAccess)
{
if ((FileObject->ReadAccess == FALSE) &&
(FileObject->WriteAccess == FALSE) &&
(FileObject->DeleteAccess == FALSE))
{
return;
}
PAGED_CODE();
if (FileObject->ReadAccess ||
FileObject->WriteAccess ||
FileObject->DeleteAccess)
{
ShareAccess->OpenCount--;
if (FileObject->ReadAccess == TRUE)
{
ShareAccess->Readers--;
}
if (FileObject->WriteAccess == TRUE)
{
ShareAccess->Writers--;
}
if (FileObject->DeleteAccess == TRUE)
{
ShareAccess->Deleters--;
}
if (FileObject->SharedRead == TRUE)
{
ShareAccess->SharedRead--;
}
if (FileObject->SharedWrite == TRUE)
{
ShareAccess->SharedWrite--;
}
if (FileObject->SharedDelete == TRUE)
{
ShareAccess->SharedDelete--;
ShareAccess->Readers -= FileObject->ReadAccess;
ShareAccess->Writers -= FileObject->WriteAccess;
ShareAccess->Deleters -= FileObject->DeleteAccess;
ShareAccess->SharedRead -= FileObject->SharedRead;
ShareAccess->SharedWrite -= FileObject->SharedWrite;
ShareAccess->SharedDelete -= FileObject->SharedDelete;
}
}
@ -228,9 +145,11 @@ IoSetShareAccess(IN ACCESS_MASK DesiredAccess,
BOOLEAN SharedWrite;
BOOLEAN SharedDelete;
ReadAccess = (DesiredAccess & (FILE_READ_DATA | FILE_EXECUTE));
WriteAccess = (DesiredAccess & (FILE_WRITE_DATA | FILE_APPEND_DATA));
DeleteAccess = (DesiredAccess & DELETE);
PAGED_CODE();
ReadAccess = (DesiredAccess & (FILE_READ_DATA | FILE_EXECUTE)) != 0;
WriteAccess = (DesiredAccess & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0;
DeleteAccess = (DesiredAccess & DELETE) != 0;
FileObject->ReadAccess = ReadAccess;
FileObject->WriteAccess = WriteAccess;
@ -238,10 +157,6 @@ IoSetShareAccess(IN ACCESS_MASK DesiredAccess,
if (!ReadAccess && !WriteAccess && !DeleteAccess)
{
FileObject->SharedRead = FALSE;
FileObject->SharedWrite = FALSE;
FileObject->SharedDelete = FALSE;
ShareAccess->OpenCount = 0;
ShareAccess->Readers = 0;
ShareAccess->Writers = 0;
@ -253,22 +168,22 @@ IoSetShareAccess(IN ACCESS_MASK DesiredAccess,
}
else
{
SharedRead = (DesiredShareAccess & FILE_SHARE_READ);
SharedWrite = (DesiredShareAccess & FILE_SHARE_WRITE);
SharedDelete = (DesiredShareAccess & FILE_SHARE_DELETE);
SharedRead = (DesiredShareAccess & FILE_SHARE_READ) != 0;
SharedWrite = (DesiredShareAccess & FILE_SHARE_WRITE) != 0;
SharedDelete = (DesiredShareAccess & FILE_SHARE_DELETE) != 0;
FileObject->SharedRead = SharedRead;
FileObject->SharedWrite = SharedWrite;
FileObject->SharedDelete = SharedDelete;
ShareAccess->OpenCount = 1;
ShareAccess->Readers = (ReadAccess) ? 1 : 0;
ShareAccess->Writers = (WriteAccess) ? 1 : 0;
ShareAccess->Deleters = (DeleteAccess) ? 1 : 0;
ShareAccess->Readers = ReadAccess;
ShareAccess->Writers = WriteAccess;
ShareAccess->Deleters = DeleteAccess;
ShareAccess->SharedRead = (SharedRead) ? 1 : 0;
ShareAccess->SharedWrite = (SharedWrite) ? 1 : 0;
ShareAccess->SharedDelete = (SharedDelete) ? 1 : 0;
ShareAccess->SharedRead = SharedRead;
ShareAccess->SharedWrite = SharedWrite;
ShareAccess->SharedDelete = SharedDelete;
}
}
@ -346,7 +261,7 @@ IoSetInformation(IN PFILE_OBJECT FileObject,
Status = ObReferenceObjectByPointer(FileObject,
FILE_WRITE_ATTRIBUTES,
0, /* FIXME - depends on the information class */
IoFileObjectType,
KernelMode);
if (!NT_SUCCESS(Status))