Function bcache_remove_clean_blocks

src/blockcache.cc:1278–1308

remove all clean blocks of the FILE

// remove all clean blocks of the FILE
void bcache_remove_clean_blocks(struct filemgr *file)
{
    struct list_elem *e;
    struct bcache_item *item;
    struct fnamedic_item *fname_item;

    fname_item = file->bcache;

    if (fname_item) {
        // Note that this function is only invoked as part of database file close or
        // removal when there are no database handles for a given file. Therefore,
        // we don't need to grab all the shard locks at once.

        // remove all clean blocks from each shard in a file.
        size_t i = 0;
        for (; i < fname_item->num_shards; ++i) {
            spin_lock(&fname_item->shards[i].lock);
            e = list_begin(&fname_item->shards[i].cleanlist);
            while(e){
                item = _get_entry(e, struct bcache_item, list_elem);
                // remove from clean list
                e = list_remove(&fname_item->shards[i].cleanlist, e);
                // remove from hash table
                hash_remove(&fname_item->shards[i].hashtable, &item->hash_elem);
                // insert into free list
                _bcache_release_freeblock(item);
            }
            spin_unlock(&fname_item->shards[i].lock);
        }
    }
}

// remove file from filename dictionary
// MUST sure that there is no dirty block belongs to this FILE