Subversion Repositories HelenOS

    fat_node_t *parentp = (fat_node_t *)prnt;

    fat_node_t *childp = (fat_node_t *)chld;

    fat_bs_t *bs;

    fat_dentry_t *d;

    uint16_t bps;

    block_t *b;

    futex_down(&parentp->lock);

    futex_down(&childp->lock);

    assert(childp->lnkcnt == 1);

    futex_down(&childp->idx->lock);

    bs = block_bb_get(childp->idx->dev_handle);

    bps = uint16_t_le2host(bs->bps);

    b = _fat_block_get(bs, childp->idx->dev_handle, childp->idx->pfc,

        (childp->idx->pdi * sizeof(fat_dentry_t)) / bps,

        BLOCK_FLAGS_NONE);

    d = (fat_dentry_t *)b->data +

        (childp->idx->pdi % (bps / sizeof(fat_dentry_t)));

    /* mark the dentry as not-currently-used */

    d->name[0] = FAT_DENTRY_ERASED;

    block_put(b);

    /* remove the index structure from the position hash */

    fat_idx_hashout(childp->idx);

    /* clear position information */

    childp->idx->pfc = FAT_CLST_RES0;

    childp->idx->pdi = 0;

    futex_up(&childp->idx->lock);

    childp->lnkcnt = 0;

    childp->dirty = true;

    futex_up(&childp->lock);

    futex_up(&parentp->lock);

    return EOK;