/*
* Free the given descriptor.
*
* This requires setting the bit in the chunk's free mask corresponding
* to the given slot.
*/
void
xfs_trans_free_item(xfs_trans_t *tp, xfs_log_item_desc_t *lidp)
{
uint slot;
xfs_log_item_chunk_t *licp;
xfs_log_item_chunk_t **licpp;
slot = XFS_LIC_DESC_TO_SLOT(lidp);
licp = XFS_LIC_DESC_TO_CHUNK(lidp);
XFS_LIC_RELSE(licp, slot);
lidp->lid_item->li_desc = NULL;
tp->t_items_free++;
/*
* If there are no more used items in the chunk and this is not
* the chunk embedded in the transaction structure, then free
* the chunk. First pull it from the chunk list and then
* free it back to the heap. We didn't bother with a doubly
* linked list here because the lists should be very short
* and this is not a performance path. It's better to save
* the memory of the extra pointer.
*
* Also decrement the transaction structure's count of free items
* by the number in a chunk since we are freeing an empty chunk.
*/
if (XFS_LIC_ARE_ALL_FREE(licp) && (licp != &(tp->t_items))) {
licpp = &(tp->t_items.lic_next);
while (*licpp != licp) {
ASSERT(*licpp != NULL);
licpp = &((*licpp)->lic_next);
}
*licpp = licp->lic_next;
kmem_free(licp, sizeof(xfs_log_item_chunk_t));
tp->t_items_free -= XFS_LIC_NUM_SLOTS;
}
}
xfs_log_item_chunk_t *
xfs_lic_desc_to_chunk(xfs_log_item_desc_t *dp)
{
return XFS_LIC_DESC_TO_CHUNK(dp);
}
