/**
* delete an entry from the volume group cache.
*
* If partition is scanning, actually puts the entry on a list of entries
* to delete when the scan is done.
*
* @param[in] dp disk partition object
* @param[in] parent parent volume id
* @param[in] child child volume id
*
* @pre VOL_LOCK held
*
* @return operation status
* @retval 0 success
*/
int
VVGCache_entry_del_r(struct DiskPartition64 * dp,
VolumeId parent, VolumeId child)
{
if (VVGCache.part[dp->index].state == VVGC_PART_STATE_UPDATING) {
int code;
code = _VVGC_dlist_add_r(dp, parent, child);
if (code) {
return code;
}
}
return _VVGC_entry_purge_r(dp, parent, child);
}
/**
* delete all of the entries in the dlist from the VGC.
*
* Traverses the to-delete list for the specified partition, and deletes
* the specified entries from the global VGC. Also deletes the entries from
* the dlist itself as it goes along.
*
* @param[in] dp the partition whose dlist we are flushing
*/
static void
_VVGC_flush_dlist(struct DiskPartition64 *dp)
{
int i;
VVGCache_dlist_entry_t *ent, *nent;
for (i = 0; i < VolumeHashTable.Size; i++) {
for (queue_Scan(&VVGCache.part[dp->index].dlist_hash_buckets[i],
ent, nent,
VVGCache_dlist_entry)) {
_VVGC_entry_purge_r(dp, ent->parent, ent->child);
queue_Remove(ent);
free(ent);
}
}
}