コード例 #1
0
ファイル: tls_sw.c プロジェクト: SantoshShilimkar/linux
static void trim_sg(struct sock *sk, struct scatterlist *sg,
		    int *sg_num_elem, unsigned int *sg_size, int target_size)
{
	int i = *sg_num_elem - 1;
	int trim = *sg_size - target_size;

	if (trim <= 0) {
		WARN_ON(trim < 0);
		return;
	}

	*sg_size = target_size;
	while (trim >= sg[i].length) {
		trim -= sg[i].length;
		sk_mem_uncharge(sk, sg[i].length);
		put_page(sg_page(&sg[i]));
		i--;

		if (i < 0)
			goto out;
	}

	sg[i].length -= trim;
	sk_mem_uncharge(sk, trim);

out:
	*sg_num_elem = i + 1;
}
コード例 #2
0
ファイル: tls_sw.c プロジェクト: SantoshShilimkar/linux
static void free_sg(struct sock *sk, struct scatterlist *sg,
		    int *sg_num_elem, unsigned int *sg_size)
{
	int i, n = *sg_num_elem;

	for (i = 0; i < n; ++i) {
		sk_mem_uncharge(sk, sg[i].length);
		put_page(sg_page(&sg[i]));
	}
	*sg_num_elem = 0;
	*sg_size = 0;
}
コード例 #3
0
ファイル: kcmsock.c プロジェクト: BWhitten/linux-stable
static void kcm_rfree(struct sk_buff *skb)
{
	struct sock *sk = skb->sk;
	struct kcm_sock *kcm = kcm_sk(sk);
	struct kcm_mux *mux = kcm->mux;
	unsigned int len = skb->truesize;

	sk_mem_uncharge(sk, len);
	atomic_sub(len, &sk->sk_rmem_alloc);

	/* For reading rx_wait and rx_psock without holding lock */
	smp_mb__after_atomic();

	if (!kcm->rx_wait && !kcm->rx_psock &&
	    sk_rmem_alloc_get(sk) < sk->sk_rcvlowat) {
		spin_lock_bh(&mux->rx_lock);
		kcm_rcv_ready(kcm);
		spin_unlock_bh(&mux->rx_lock);
	}
}