Function Ext2LookupFile

Ext4Fsd/create.c:272–562

}

NTSTATUS
Ext2LookupFile (
    IN PEXT2_IRP_CONTEXT    IrpContext,
    IN PEXT2_VCB            Vcb,
    IN PUNICODE_STRING      FullName,
    IN PEXT2_MCB            Parent,
    OUT PEXT2_MCB *         Ext2Mcb,
    IN ULONG                Linkdep
)
{
    NTSTATUS        Status = STATUS_OBJECT_NAME_NOT_FOUND;
    UNICODE_STRING  FileName;
    PEXT2_MCB       Mcb = NULL;
    struct dentry  *de = NULL;

    USHORT          i = 0, End;
    ULONG           Inode;

    BOOLEAN         bParent = FALSE;
    BOOLEAN         bDirectory = FALSE;
    BOOLEAN         LockAcquired = FALSE;
    BOOLEAN         bNotFollow = FALSE;

    __try {

        ExAcquireResourceExclusiveLite(&Vcb->McbLock, TRUE);
        LockAcquired = TRUE;

        bNotFollow = IsFlagOn(Linkdep, EXT2_LOOKUP_NOT_FOLLOW);
        Linkdep = ClearFlag(Linkdep, EXT2_LOOKUP_FLAG_MASK);

        *Ext2Mcb = NULL;

        DEBUG(DL_RES, ("Ext2LookupFile: %wZ\n", FullName));

        /* check names and parameters */
        if (FullName->Buffer[0] == L'\\') {
            Parent = Vcb->McbTree;
        } else if (Parent) {
            bParent = TRUE;
        } else {
            Parent = Vcb->McbTree;
        }

        /* make sure the parent is NULL */
        if (!IsMcbDirectory(Parent)) {
            Status =  STATUS_NOT_A_DIRECTORY;
            __leave;
        }

        /* use symlink's target as parent directory */
        if (IsMcbSymLink(Parent)) {
            Parent = Parent->Target;
            ASSERT(!IsMcbSymLink(Parent));
            if (IsFileDeleted(Parent)) {
                Status =  STATUS_NOT_A_DIRECTORY;
                __leave;
            }