Function Ext2FlushVcb

Ext4Fsd/ext3/generic.c:319–379

}

NTSTATUS
Ext2FlushVcb(IN PEXT2_VCB Vcb)
{
    LARGE_INTEGER        s = {0}, o;
    struct ext4_sb_info *sbi = &Vcb->sbi;
    struct rb_node      *node;
    struct buffer_head  *bh;

    if (!IsFlagOn(Vcb->Flags, VCB_GD_LOADED)) {
        CcFlushCache(&Vcb->SectionObject, NULL, 0, NULL);
        goto errorout;
    }

    ASSERT(ExIsResourceAcquiredExclusiveLite(&Vcb->MainResource));

    __try {

        /* acqurie gd block */
        ExAcquireResourceExclusiveLite(&Vcb->sbi.s_gd_lock, TRUE);

        /* acquire bd lock to avoid bh creation */
        ExAcquireResourceExclusiveLite(&Vcb->bd.bd_bh_lock, TRUE);

        /* drop unused bh */
        Ext2DropBH(Vcb);

        /* flush volume with all outstanding bh skipped */

        node = rb_first(&Vcb->bd.bd_bh_root);
        while (node) {

            bh = container_of(node, struct buffer_head, b_rb_node);
            node = rb_next(node);

            o.QuadPart = bh->b_blocknr << BLOCK_BITS;
            ASSERT(o.QuadPart >= s.QuadPart);

            if (o.QuadPart == s.QuadPart) {
                s.QuadPart = s.QuadPart + bh->b_size;
                continue;
            }

            if (o.QuadPart > s.QuadPart) {
                Ext2FlushRange(Vcb, s, o);
                s.QuadPart = (bh->b_blocknr << BLOCK_BITS) + bh->b_size;
                continue;
            }
        }

        o = Vcb->PartitionInformation.PartitionLength;
        Ext2FlushRange(Vcb, s, o);

    } __finally {

        ExReleaseResourceLite(&Vcb->bd.bd_bh_lock);
        ExReleaseResourceLite(&Vcb->sbi.s_gd_lock);
    }