* @sk_dst_cache: destination cache
* @sk_dst_pending_confirm: need to confirm neighbour
* @sk_policy: flow policy
- * @sk_rx_skb_cache: cache copy of recently accessed RX skb
* @sk_receive_queue: incoming packets
* @sk_wmem_alloc: transmit queue bytes committed
* @sk_tsq_flags: TCP Small Queues flags
* @sk_peek_off: current peek_offset value
* @sk_send_head: front of stuff to transmit
* @tcp_rtx_queue: TCP re-transmit queue [union with @sk_send_head]
- * @sk_tx_skb_cache: cache copy of recently accessed TX skb
* @sk_security: used by security modules
* @sk_mark: generic packet mark
* @sk_cgrp_data: cgroup data for this cgroup
atomic_t sk_drops;
int sk_rcvlowat;
struct sk_buff_head sk_error_queue;
- struct sk_buff *sk_rx_skb_cache;
struct sk_buff_head sk_receive_queue;
/*
* The backlog queue is special, it is always used with
struct sk_buff *sk_send_head;
struct rb_root tcp_rtx_queue;
};
- struct sk_buff *sk_tx_skb_cache;
struct sk_buff_head sk_write_queue;
__s32 sk_peek_off;
int sk_write_pending;
__sk_mem_reclaim(sk, 1 << 20);
}
-DECLARE_STATIC_KEY_FALSE(tcp_tx_skb_cache_key);
static inline void sk_wmem_free_skb(struct sock *sk, struct sk_buff *skb)
{
sk_wmem_queued_add(sk, -skb->truesize);
sk_mem_uncharge(sk, skb->truesize);
- if (static_branch_unlikely(&tcp_tx_skb_cache_key) &&
- !sk->sk_tx_skb_cache && !skb_cloned(skb)) {
- skb_ext_reset(skb);
- skb_zcopy_clear(skb, true);
- sk->sk_tx_skb_cache = skb;
- return;
- }
__kfree_skb(skb);
}
&skb_shinfo(skb)->tskey);
}
-DECLARE_STATIC_KEY_FALSE(tcp_rx_skb_cache_key);
/**
* sk_eat_skb - Release a skb if it is no longer needed
* @sk: socket to eat this skb from
static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb)
{
__skb_unlink(skb, &sk->sk_receive_queue);
- if (static_branch_unlikely(&tcp_rx_skb_cache_key) &&
- !sk->sk_rx_skb_cache) {
- sk->sk_rx_skb_cache = skb;
- skb_orphan(skb);
- return;
- }
__kfree_skb(skb);
}