Function fs_trim_cache

tinyemu/fs_net.c:670–697

remove elements in the cache considering that 'added_size' will be added */

/* remove elements in the cache considering that 'added_size' will be
   added */
static void fs_trim_cache(FSDevice *fs1, int64_t added_size)
{
    FSDeviceMem *fs = (FSDeviceMem *)fs1;
    struct list_head *el, *el1;
    FSINode *n;

    if ((fs->inode_cache_size + added_size) <= fs->inode_cache_size_limit)
        return;
    list_for_each_prev_safe(el, el1, &fs->inode_cache_list) {
        n = list_entry(el, FSINode, u.reg.link);
        assert(n->u.reg.state == REG_STATE_LOADED);
        /* cannot remove open files */
        //        printf("open_count=%d\n", n->open_count);
        if (n->open_count != 0)
            continue;
#ifdef DEBUG_CACHE
        printf("fs_trim_cache: remove '%s' size=%ld\n",
               n->u.reg.filename, (long)n->u.reg.size);
#endif
        file_buffer_reset(&n->u.reg.fbuf);
        n->u.reg.state = REG_STATE_UNLOADED;
        list_del(&n->u.reg.link);
        fs->inode_cache_size -= n->u.reg.size;
        assert(fs->inode_cache_size >= 0);
        if ((fs->inode_cache_size + added_size) <= fs->inode_cache_size_limit)
            break;
    }
}

static void fs_open_end(FSOpenInfo *oi)
{